23 files changed, 10504 insertions, 0 deletions

diff --git a/libkmod/.gitignore b/libkmod/.gitignore
new file mode 100644
index 0000000..826fd62
--- /dev/null
+++ b/libkmod/.gitignore
@@ -0,0 +1,6 @@
+.dirstamp
+.deps/
+.libs/
+*.la
+*.lo
+libkmod.pc
diff --git a/libkmod/COPYING b/libkmod/COPYING
new file mode 100644
index 0000000..8add30a
--- /dev/null
+++ b/libkmod/COPYING
@@ -0,0 +1,504 @@
+		  GNU LESSER GENERAL PUBLIC LICENSE
+		       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+     51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
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diff --git a/libkmod/Makefile b/libkmod/Makefile
new file mode 100644
index 0000000..223bec2
--- /dev/null
+++ b/libkmod/Makefile
@@ -0,0 +1,13 @@
+#  Copyright 2010 Lennart Poettering
+#
+# This file has been copied from systemd. It is a dirty trick to simplify
+# compilation when CWD is not the root of the source tree. This file is not
+# intended to be distributed.  So, don't touch it, even better ignore it!
+
+all:
+	$(MAKE) -C ..
+
+clean:
+	$(MAKE) -C .. clean
+
+.PHONY: all clean
diff --git a/libkmod/README b/libkmod/README
new file mode 100644
index 0000000..3e1c8dc
--- /dev/null
+++ b/libkmod/README
@@ -0,0 +1,58 @@
+libkmod - linux kernel module handling library
+
+ABSTRACT
+========
+
+libkmod was created to allow programs to easily insert, remove and
+list modules, also checking its properties, dependencies and aliases.
+
+there is no shared/global context information and it can be used by
+multiple sites on a single program, also being able to be used from
+threads, although it's not thread safe (you must lock explicitly).
+
+
+OVERVIEW
+========
+
+Every user should create and manage it's own library context with:
+
+   struct kmod_ctx *ctx = kmod_new(kernel_dirname);
+   kmod_unref(ctx);
+
+
+Modules can be created by various means:
+
+   struct kmod_module *mod;
+   int err;
+
+   err = kmod_module_new_from_path(ctx, path, &mod);
+   if (err < 0) {
+      /* code */
+   } else {
+      /* code */
+      kmod_module_unref(mod);
+   }
+
+   err = kmod_module_new_from_name(ctx, name, &mod);
+   if (err < 0) {
+      /* code */
+   } else {
+      /* code */
+      kmod_module_unref(mod);
+   }
+
+
+Or could be resolved from a known alias to a list of alternatives:
+
+   struct kmod_list *list, *itr;
+   int err;
+   err = kmod_module_new_from_lookup(ctx, alias, &list);
+   if (err < 0) {
+      /* code */
+   } else {
+      kmod_list_foreach(itr, list) {
+         struct kmod_module *mod = kmod_module_get_module(itr);
+         /* code */
+      }
+   }
+
diff --git a/libkmod/docs/.gitignore b/libkmod/docs/.gitignore
new file mode 100644
index 0000000..7514b08
--- /dev/null
+++ b/libkmod/docs/.gitignore
@@ -0,0 +1,14 @@
+*.bak
+*.stamp
+*.sgml
+libkmod.*
+libkmod-*.xml
+!libkmod-docs.xml
+libkmod-*.txt
+!libkmod-sections.txt
+version.xml
+xml
+html
+gtk-doc.make
+Makefile
+Makefile.in
diff --git a/libkmod/docs/Makefile.am b/libkmod/docs/Makefile.am
new file mode 100644
index 0000000..c4f3d69
--- /dev/null
+++ b/libkmod/docs/Makefile.am
@@ -0,0 +1,34 @@
+
+AUTOMAKE_OPTIONS = 1.11
+
+DOC_MODULE = libkmod
+
+DOC_MODULE_VERSION = 3
+
+DOC_MAIN_SGML_FILE = $(DOC_MODULE)-docs.xml
+
+DOC_SOURCE_DIR = $(top_srcdir)/libkmod
+
+SCAN_OPTIONS = --ignore-decorators="__must_check|KMOD_EXPORT"
+
+MKDB_OPTIONS = --xml-mode --output-format=xml --name-space kmod --tmpl-dir=.
+
+MKTMPL_OPTIONS = --output-dir=.
+
+MKHTML_OPTIONS = --path=$(abs_srcdir)/doc --path=$(abs_builddir)/doc
+
+HFILE_GLOB = $(top_srcdir)/libkmod/libkmod.h
+CFILE_GLOB = $(top_srcdir)/libkmod/libkmod.c $(top_srcdir)/libkmod/libkmod-module.c $(top_srcdir)/libkmod/libkmod-list.c
+
+IGNORE_HFILES = libkmod-internal.h \
+		libkmod-index.h
+
+content_files = version.xml
+
+EXTRA_DIST =
+
+if ENABLE_GTK_DOC
+include $(top_srcdir)/libkmod/docs/gtk-doc.make
+else
+EXTRA_DIST += libkmod-docs.xml libkmod-sections.txt
+endif
diff --git a/libkmod/docs/libkmod-docs.xml b/libkmod/docs/libkmod-docs.xml
new file mode 100644
index 0000000..fd17506
--- /dev/null
+++ b/libkmod/docs/libkmod-docs.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd"
+[
+  <!ENTITY % local.common.attrib "xmlns:xi  CDATA  #FIXED 'http://www.w3.org/2003/XInclude'">
+  <!ENTITY version SYSTEM "version.xml">
+]>
+<book id="index">
+  <bookinfo>
+    <title>libkmod Reference Manual</title>
+    <releaseinfo>for libkmod version &version;</releaseinfo>
+  </bookinfo>
+
+  <chapter>
+    <title>libkmod</title>
+    <xi:include href="xml/libkmod.xml"/>
+    <xi:include href="xml/libkmod-list.xml"/>
+    <xi:include href="xml/libkmod-config.xml"/>
+    <xi:include href="xml/libkmod-module.xml"/>
+    <xi:include href="xml/libkmod-loaded.xml"/>
+  </chapter>
+
+  <index id="api-index-full">
+    <title>API Index</title>
+    <xi:include href="xml/api-index-full.xml"><xi:fallback /></xi:include>
+  </index>
+</book>
diff --git a/libkmod/docs/libkmod-sections.txt b/libkmod/docs/libkmod-sections.txt
new file mode 100644
index 0000000..33d9eec
--- /dev/null
+++ b/libkmod/docs/libkmod-sections.txt
@@ -0,0 +1,108 @@
+<SECTION>
+<FILE>libkmod</FILE>
+kmod_ctx
+kmod_new
+kmod_ref
+kmod_unref
+
+kmod_load_resources
+kmod_unload_resources
+kmod_validate_resources
+kmod_dump_index
+
+kmod_set_log_priority
+kmod_get_log_priority
+kmod_set_log_fn
+kmod_get_userdata
+kmod_set_userdata
+kmod_get_dirname
+</SECTION>
+
+<SECTION>
+<FILE>libkmod-list</FILE>
+kmod_list
+kmod_list_foreach
+kmod_list_foreach_reverse
+kmod_list_last
+kmod_list_next
+kmod_list_prev
+</SECTION>
+
+<SECTION>
+<FILE>libkmod-config</FILE>
+kmod_config_iter
+kmod_config_get_blacklists
+kmod_config_get_install_commands
+kmod_config_get_remove_commands
+kmod_config_get_aliases
+kmod_config_get_options
+kmod_config_get_softdeps
+kmod_config_iter_get_key
+kmod_config_iter_get_value
+kmod_config_iter_next
+kmod_config_iter_free_iter
+</SECTION>
+
+<SECTION>
+<FILE>libkmod-module</FILE>
+kmod_module
+kmod_module_new_from_lookup
+kmod_module_new_from_name_lookup
+kmod_module_new_from_name
+kmod_module_new_from_path
+
+kmod_module_ref
+kmod_module_unref
+kmod_module_unref_list
+
+kmod_module_insert_module
+kmod_module_probe_insert_module
+kmod_module_remove_module
+
+kmod_module_get_module
+kmod_module_get_dependencies
+kmod_module_get_softdeps
+kmod_module_apply_filter
+kmod_module_get_filtered_blacklist
+kmod_module_get_install_commands
+kmod_module_get_remove_commands
+kmod_module_get_name
+kmod_module_get_options
+kmod_module_get_path
+
+kmod_module_get_dependency_symbols
+kmod_module_dependency_symbol_get_bind
+kmod_module_dependency_symbol_get_crc
+kmod_module_dependency_symbol_get_symbol
+kmod_module_dependency_symbols_free_list
+
+kmod_module_get_sections
+kmod_module_section_free_list
+kmod_module_section_get_address
+kmod_module_section_get_name
+
+kmod_module_get_symbols
+kmod_module_symbol_get_crc
+kmod_module_symbol_get_symbol
+kmod_module_symbols_free_list
+
+kmod_module_get_versions
+kmod_module_version_get_crc
+kmod_module_version_get_symbol
+kmod_module_versions_free_list
+
+kmod_module_get_info
+kmod_module_info_free_list
+kmod_module_info_get_key
+kmod_module_info_get_value
+</SECTION>
+
+<SECTION>
+<FILE>libkmod-loaded</FILE>
+kmod_module_new_from_loaded
+kmod_module_get_initstate
+kmod_module_initstate_str
+kmod_module_get_size
+kmod_module_get_refcnt
+kmod_module_get_holders
+</SECTION>
diff --git a/libkmod/docs/version.xml.in b/libkmod/docs/version.xml.in
new file mode 100644
index 0000000..d78bda9
--- /dev/null
+++ b/libkmod/docs/version.xml.in
@@ -0,0 +1 @@
+@VERSION@
diff --git a/libkmod/libkmod-builtin.c b/libkmod/libkmod-builtin.c
new file mode 100644
index 0000000..65334a8
--- /dev/null
+++ b/libkmod/libkmod-builtin.c
@@ -0,0 +1,330 @@
+/*
+ * libkmod - interface to kernel built-in modules
+ *
+ * Copyright (C) 2019  Alexey Gladkov <gladkov.alexey@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "libkmod.h"
+#include "libkmod-internal.h"
+
+#define MODULES_BUILTIN_MODINFO "modules.builtin.modinfo"
+
+struct kmod_builtin_iter {
+	struct kmod_ctx *ctx;
+
+	// The file descriptor.
+	int file;
+
+	// The total size in bytes.
+	ssize_t size;
+
+	// The offset of current module.
+	off_t pos;
+
+	// The offset at which the next module is located.
+	off_t next;
+
+	// Number of strings in the current block.
+	ssize_t nstrings;
+
+	// Internal buffer and its size.
+	size_t bufsz;
+	char *buf;
+};
+
+static struct kmod_builtin_iter *kmod_builtin_iter_new(struct kmod_ctx *ctx)
+{
+	char path[PATH_MAX];
+	int file, sv_errno;
+	struct stat sb;
+	struct kmod_builtin_iter *iter = NULL;
+	const char *dirname = kmod_get_dirname(ctx);
+	size_t len = strlen(dirname);
+
+	file = -1;
+
+	if ((len + 1 + strlen(MODULES_BUILTIN_MODINFO) + 1) >= PATH_MAX) {
+		sv_errno = ENAMETOOLONG;
+		goto fail;
+	}
+
+	snprintf(path, PATH_MAX, "%s/%s", dirname, MODULES_BUILTIN_MODINFO);
+
+	file = open(path, O_RDONLY|O_CLOEXEC);
+	if (file < 0) {
+		sv_errno = errno;
+		goto fail;
+	}
+
+	if (fstat(file, &sb) < 0) {
+		sv_errno = errno;
+		goto fail;
+	}
+
+	iter = malloc(sizeof(*iter));
+	if (!iter) {
+		sv_errno = ENOMEM;
+		goto fail;
+	}
+
+	iter->ctx = ctx;
+	iter->file = file;
+	iter->size = sb.st_size;
+	iter->nstrings = 0;
+	iter->pos = 0;
+	iter->next = 0;
+	iter->bufsz = 0;
+	iter->buf = NULL;
+
+	return iter;
+fail:
+	if (file >= 0)
+		close(file);
+
+	errno = sv_errno;
+
+	return iter;
+}
+
+static void kmod_builtin_iter_free(struct kmod_builtin_iter *iter)
+{
+	close(iter->file);
+	free(iter->buf);
+	free(iter);
+}
+
+static off_t get_string(struct kmod_builtin_iter *iter, off_t offset,
+			char **line, size_t *size)
+{
+	int sv_errno;
+	char *nullp = NULL;
+	size_t linesz = 0;
+
+	while (!nullp) {
+		char buf[BUFSIZ];
+		ssize_t sz;
+		size_t partsz;
+
+		sz = pread(iter->file, buf, BUFSIZ, offset);
+		if (sz < 0) {
+			sv_errno = errno;
+			goto fail;
+		} else if (sz == 0) {
+			offset = 0;
+			break;
+		}
+
+		nullp = memchr(buf, '\0', (size_t) sz);
+		partsz = (size_t)((nullp) ? (nullp - buf) + 1 : sz);
+		offset += (off_t) partsz;
+
+		if (iter->bufsz < linesz + partsz) {
+			iter->bufsz = linesz + partsz;
+			iter->buf = realloc(iter->buf, iter->bufsz);
+
+			if (!iter->buf) {
+				sv_errno = errno;
+				goto fail;
+			}
+		}
+
+		strncpy(iter->buf + linesz, buf, partsz);
+		linesz += partsz;
+	}
+
+	if (linesz) {
+		*line = iter->buf;
+		*size = linesz;
+	}
+
+	return offset;
+fail:
+	errno = sv_errno;
+	return -1;
+}
+
+static bool kmod_builtin_iter_next(struct kmod_builtin_iter *iter)
+{
+	char *line,  *modname;
+	size_t linesz;
+	off_t pos, offset, modlen;
+
+	modname = NULL;
+
+	iter->nstrings = 0;
+	offset = pos = iter->next;
+
+	while (offset < iter->size) {
+		char *dot;
+		off_t len;
+
+		offset = get_string(iter, pos, &line, &linesz);
+		if (offset <= 0) {
+			if (offset)
+				ERR(iter->ctx, "get_string: %s\n", strerror(errno));
+			pos = iter->size;
+			break;
+		}
+
+		dot = strchr(line, '.');
+		if (!dot) {
+			ERR(iter->ctx, "kmod_builtin_iter_next: unexpected string without modname prefix\n");
+			pos = iter->size;
+			break;
+		}
+
+		len = dot - line;
+
+		if (!modname) {
+			modname = strdup(line);
+			modlen = len;
+		} else if (modlen != len || strncmp(modname, line, len)) {
+			break;
+		}
+
+		iter->nstrings++;
+		pos = offset;
+	}
+
+	iter->pos = iter->next;
+	iter->next = pos;
+
+	free(modname);
+
+	return (iter->pos < iter->size);
+}
+
+static bool kmod_builtin_iter_get_modname(struct kmod_builtin_iter *iter,
+				char modname[static PATH_MAX])
+{
+	int sv_errno;
+	char *line, *dot;
+	size_t linesz, len;
+	off_t offset;
+
+	if (iter->pos == iter->size)
+		return false;
+
+	line = NULL;
+
+	offset = get_string(iter, iter->pos, &line, &linesz);
+	if (offset <= 0) {
+		sv_errno = errno;
+		if (offset)
+			ERR(iter->ctx, "get_string: %s\n", strerror(errno));
+		goto fail;
+	}
+
+	dot = strchr(line, '.');
+	if (!dot) {
+		sv_errno = errno;
+		ERR(iter->ctx, "kmod_builtin_iter_get_modname: unexpected string without modname prefix\n");
+		goto fail;
+	}
+
+	len = dot - line;
+
+	if (len >= PATH_MAX) {
+		sv_errno = ENAMETOOLONG;
+		goto fail;
+	}
+
+	strncpy(modname, line, len);
+	modname[len] = '\0';
+
+	return true;
+fail:
+	errno = sv_errno;
+	return false;
+}
+
+/* array will be allocated with strings in a single malloc, just free *array */
+ssize_t kmod_builtin_get_modinfo(struct kmod_ctx *ctx, const char *modname,
+				char ***modinfo)
+{
+	ssize_t count = 0;
+	char *s, *line = NULL;
+	size_t i, n, linesz, modlen, size;
+	off_t pos, offset;
+
+	char *name = NULL;
+	char buf[PATH_MAX];
+
+	struct kmod_builtin_iter *iter = kmod_builtin_iter_new(ctx);
+
+	if (!iter)
+		return -errno;
+
+	while (!name && kmod_builtin_iter_next(iter)) {
+		if (!kmod_builtin_iter_get_modname(iter, buf)) {
+			count = -errno;
+			goto fail;
+		}
+
+		if (strcmp(modname, buf))
+			continue;
+
+		name = buf;
+	}
+
+	if (!name) {
+		count = -ENOSYS;
+		goto fail;
+	}
+
+	modlen = strlen(modname) + 1;
+	count = iter->nstrings;
+	size = iter->next - iter->pos - (modlen * count);
+
+	*modinfo = malloc(size + sizeof(char *) * (count + 1));
+	if (!*modinfo) {
+		count = -errno;
+		goto fail;
+	}
+
+	s = (char *)(*modinfo + count + 1);
+	i = 0;
+
+	n = 0;
+	offset = pos = iter->pos;
+
+	while (offset < iter->next) {
+		offset = get_string(iter, pos, &line, &linesz);
+		if (offset <= 0) {
+			count = (offset) ? -errno : -EINVAL;
+			free(*modinfo);
+			goto fail;
+		}
+
+		strcpy(s + i, line + modlen);
+		(*modinfo)[n++] = s + i;
+		i += linesz - modlen;
+
+		pos = offset;
+	}
+fail:
+	kmod_builtin_iter_free(iter);
+	return count;
+}
diff --git a/libkmod/libkmod-config.c b/libkmod/libkmod-config.c
new file mode 100644
index 0000000..e83621b
--- /dev/null
+++ b/libkmod/libkmod-config.c
@@ -0,0 +1,1252 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ * Copyright (C) 2013  Intel Corporation. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <shared/util.h>
+
+#include "libkmod.h"
+#include "libkmod-internal.h"
+
+struct kmod_alias {
+	char *name;
+	char modname[];
+};
+
+struct kmod_options {
+	char *options;
+	char modname[];
+};
+
+struct kmod_command {
+	char *command;
+	char modname[];
+};
+
+struct kmod_softdep {
+	char *name;
+	const char **pre;
+	const char **post;
+	unsigned int n_pre;
+	unsigned int n_post;
+};
+
+const char *kmod_blacklist_get_modname(const struct kmod_list *l)
+{
+	return l->data;
+}
+
+const char *kmod_alias_get_name(const struct kmod_list *l) {
+	const struct kmod_alias *alias = l->data;
+	return alias->name;
+}
+
+const char *kmod_alias_get_modname(const struct kmod_list *l) {
+	const struct kmod_alias *alias = l->data;
+	return alias->modname;
+}
+
+const char *kmod_option_get_options(const struct kmod_list *l) {
+	const struct kmod_options *alias = l->data;
+	return alias->options;
+}
+
+const char *kmod_option_get_modname(const struct kmod_list *l) {
+	const struct kmod_options *alias = l->data;
+	return alias->modname;
+}
+
+const char *kmod_command_get_command(const struct kmod_list *l) {
+	const struct kmod_command *alias = l->data;
+	return alias->command;
+}
+
+const char *kmod_command_get_modname(const struct kmod_list *l) {
+	const struct kmod_command *alias = l->data;
+	return alias->modname;
+}
+
+const char *kmod_softdep_get_name(const struct kmod_list *l) {
+	const struct kmod_softdep *dep = l->data;
+	return dep->name;
+}
+
+const char * const *kmod_softdep_get_pre(const struct kmod_list *l, unsigned int *count) {
+	const struct kmod_softdep *dep = l->data;
+	*count = dep->n_pre;
+	return dep->pre;
+}
+
+const char * const *kmod_softdep_get_post(const struct kmod_list *l, unsigned int *count) {
+	const struct kmod_softdep *dep = l->data;
+	*count = dep->n_post;
+	return dep->post;
+}
+
+static int kmod_config_add_command(struct kmod_config *config,
+						const char *modname,
+						const char *command,
+						const char *command_name,
+						struct kmod_list **list)
+{
+	_cleanup_free_ struct kmod_command *cmd;
+	struct kmod_list *l;
+	size_t modnamelen = strlen(modname) + 1;
+	size_t commandlen = strlen(command) + 1;
+
+	DBG(config->ctx, "modname='%s' cmd='%s %s'\n", modname, command_name,
+								command);
+
+	cmd = malloc(sizeof(*cmd) + modnamelen + commandlen);
+	if (!cmd)
+		return -ENOMEM;
+
+	cmd->command = sizeof(*cmd) + modnamelen + (char *)cmd;
+	memcpy(cmd->modname, modname, modnamelen);
+	memcpy(cmd->command, command, commandlen);
+
+	l = kmod_list_append(*list, cmd);
+	if (!l)
+		return -ENOMEM;
+
+	*list = l;
+	cmd = NULL;
+	return 0;
+}
+
+static void kmod_config_free_command(struct kmod_config *config,
+					struct kmod_list *l,
+					struct kmod_list **list)
+{
+	struct kmod_command *cmd = l->data;
+
+	free(cmd);
+	*list = kmod_list_remove(l);
+}
+
+static int kmod_config_add_options(struct kmod_config *config,
+				const char *modname, const char *options)
+{
+	_cleanup_free_ struct kmod_options *opt;
+	struct kmod_list *list;
+	size_t modnamelen = strlen(modname) + 1;
+	size_t optionslen = strlen(options) + 1;
+
+	DBG(config->ctx, "modname='%s' options='%s'\n", modname, options);
+
+	opt = malloc(sizeof(*opt) + modnamelen + optionslen);
+	if (!opt)
+		return -ENOMEM;
+
+	opt->options = sizeof(*opt) + modnamelen + (char *)opt;
+
+	memcpy(opt->modname, modname, modnamelen);
+	memcpy(opt->options, options, optionslen);
+	strchr_replace(opt->options, '\t', ' ');
+
+	list = kmod_list_append(config->options, opt);
+	if (!list)
+		return -ENOMEM;
+
+	opt = NULL;
+	config->options = list;
+	return 0;
+}
+
+static void kmod_config_free_options(struct kmod_config *config,
+							struct kmod_list *l)
+{
+	struct kmod_options *opt = l->data;
+
+	free(opt);
+
+	config->options = kmod_list_remove(l);
+}
+
+static int kmod_config_add_alias(struct kmod_config *config,
+					const char *name, const char *modname)
+{
+	_cleanup_free_ struct kmod_alias *alias;
+	struct kmod_list *list;
+	size_t namelen = strlen(name) + 1, modnamelen = strlen(modname) + 1;
+
+	DBG(config->ctx, "name=%s modname=%s\n", name, modname);
+
+	alias = malloc(sizeof(*alias) + namelen + modnamelen);
+	if (!alias)
+		return -ENOMEM;
+
+	alias->name = sizeof(*alias) + modnamelen + (char *)alias;
+
+	memcpy(alias->modname, modname, modnamelen);
+	memcpy(alias->name, name, namelen);
+
+	list = kmod_list_append(config->aliases, alias);
+	if (!list)
+		return -ENOMEM;
+
+	alias = NULL;
+	config->aliases = list;
+	return 0;
+}
+
+static void kmod_config_free_alias(struct kmod_config *config,
+							struct kmod_list *l)
+{
+	struct kmod_alias *alias = l->data;
+
+	free(alias);
+
+	config->aliases = kmod_list_remove(l);
+}
+
+static int kmod_config_add_blacklist(struct kmod_config *config,
+							const char *modname)
+{
+	_cleanup_free_ char *p;
+	struct kmod_list *list;
+
+	DBG(config->ctx, "modname=%s\n", modname);
+
+	p = strdup(modname);
+	if (!p)
+		return -ENOMEM;
+
+	list = kmod_list_append(config->blacklists, p);
+	if (!list)
+		return -ENOMEM;
+
+	p = NULL;
+	config->blacklists = list;
+	return 0;
+}
+
+static void kmod_config_free_blacklist(struct kmod_config *config,
+							struct kmod_list *l)
+{
+	free(l->data);
+	config->blacklists = kmod_list_remove(l);
+}
+
+static int kmod_config_add_softdep(struct kmod_config *config,
+							const char *modname,
+							const char *line)
+{
+	struct kmod_list *list;
+	struct kmod_softdep *dep;
+	const char *s, *p;
+	char *itr;
+	unsigned int n_pre = 0, n_post = 0;
+	size_t modnamelen = strlen(modname) + 1;
+	size_t buflen = 0;
+	bool was_space = false;
+	enum { S_NONE, S_PRE, S_POST } mode = S_NONE;
+
+	DBG(config->ctx, "modname=%s\n", modname);
+
+	/* analyze and count */
+	for (p = s = line; ; s++) {
+		size_t plen;
+
+		if (*s != '\0') {
+			if (!isspace(*s)) {
+				was_space = false;
+				continue;
+			}
+
+			if (was_space) {
+				p = s + 1;
+				continue;
+			}
+			was_space = true;
+
+			if (p >= s)
+				continue;
+		}
+		plen = s - p;
+
+		if (plen == sizeof("pre:") - 1 &&
+				memcmp(p, "pre:", sizeof("pre:") - 1) == 0)
+			mode = S_PRE;
+		else if (plen == sizeof("post:") - 1 &&
+				memcmp(p, "post:", sizeof("post:") - 1) == 0)
+			mode = S_POST;
+		else if (*s != '\0' || (*s == '\0' && !was_space)) {
+			if (mode == S_PRE) {
+				buflen += plen + 1;
+				n_pre++;
+			} else if (mode == S_POST) {
+				buflen += plen + 1;
+				n_post++;
+			}
+		}
+		p = s + 1;
+		if (*s == '\0')
+			break;
+	}
+
+	DBG(config->ctx, "%u pre, %u post\n", n_pre, n_post);
+
+	dep = malloc(sizeof(struct kmod_softdep) + modnamelen +
+		     n_pre * sizeof(const char *) +
+		     n_post * sizeof(const char *) +
+		     buflen);
+	if (dep == NULL) {
+		ERR(config->ctx, "out-of-memory modname=%s\n", modname);
+		return -ENOMEM;
+	}
+	dep->n_pre = n_pre;
+	dep->n_post = n_post;
+	dep->pre = (const char **)((char *)dep + sizeof(struct kmod_softdep));
+	dep->post = dep->pre + n_pre;
+	dep->name = (char *)(dep->post + n_post);
+
+	memcpy(dep->name, modname, modnamelen);
+
+	/* copy strings */
+	itr = dep->name + modnamelen;
+	n_pre = 0;
+	n_post = 0;
+	mode = S_NONE;
+	was_space = false;
+	for (p = s = line; ; s++) {
+		size_t plen;
+
+		if (*s != '\0') {
+			if (!isspace(*s)) {
+				was_space = false;
+				continue;
+			}
+
+			if (was_space) {
+				p = s + 1;
+				continue;
+			}
+			was_space = true;
+
+			if (p >= s)
+				continue;
+		}
+		plen = s - p;
+
+		if (plen == sizeof("pre:") - 1 &&
+				memcmp(p, "pre:", sizeof("pre:") - 1) == 0)
+			mode = S_PRE;
+		else if (plen == sizeof("post:") - 1 &&
+				memcmp(p, "post:", sizeof("post:") - 1) == 0)
+			mode = S_POST;
+		else if (*s != '\0' || (*s == '\0' && !was_space)) {
+			if (mode == S_PRE) {
+				dep->pre[n_pre] = itr;
+				memcpy(itr, p, plen);
+				itr[plen] = '\0';
+				itr += plen + 1;
+				n_pre++;
+			} else if (mode == S_POST) {
+				dep->post[n_post] = itr;
+				memcpy(itr, p, plen);
+				itr[plen] = '\0';
+				itr += plen + 1;
+				n_post++;
+			}
+		}
+		p = s + 1;
+		if (*s == '\0')
+			break;
+	}
+
+	list = kmod_list_append(config->softdeps, dep);
+	if (list == NULL) {
+		free(dep);
+		return -ENOMEM;
+	}
+	config->softdeps = list;
+
+	return 0;
+}
+
+static char *softdep_to_char(struct kmod_softdep *dep) {
+	const size_t sz_preprefix = sizeof("pre: ") - 1;
+	const size_t sz_postprefix = sizeof("post: ") - 1;
+	size_t sz = 1; /* at least '\0' */
+	size_t sz_pre, sz_post;
+	const char *start, *end;
+	char *s, *itr;
+
+	/*
+	 * Rely on the fact that dep->pre[] and dep->post[] are strv's that
+	 * point to a contiguous buffer
+	 */
+	if (dep->n_pre > 0) {
+		start = dep->pre[0];
+		end = dep->pre[dep->n_pre - 1]
+					+ strlen(dep->pre[dep->n_pre - 1]);
+		sz_pre = end - start;
+		sz += sz_pre + sz_preprefix;
+	} else
+		sz_pre = 0;
+
+	if (dep->n_post > 0) {
+		start = dep->post[0];
+		end = dep->post[dep->n_post - 1]
+					+ strlen(dep->post[dep->n_post - 1]);
+		sz_post = end - start;
+		sz += sz_post + sz_postprefix;
+	} else
+		sz_post = 0;
+
+	itr = s = malloc(sz);
+	if (s == NULL)
+		return NULL;
+
+	if (sz_pre) {
+		char *p;
+
+		memcpy(itr, "pre: ", sz_preprefix);
+		itr += sz_preprefix;
+
+		/* include last '\0' */
+		memcpy(itr, dep->pre[0], sz_pre + 1);
+		for (p = itr; p < itr + sz_pre; p++) {
+			if (*p == '\0')
+				*p = ' ';
+		}
+		itr = p;
+	}
+
+	if (sz_post) {
+		char *p;
+
+		memcpy(itr, "post: ", sz_postprefix);
+		itr += sz_postprefix;
+
+		/* include last '\0' */
+		memcpy(itr, dep->post[0], sz_post + 1);
+		for (p = itr; p < itr + sz_post; p++) {
+			if (*p == '\0')
+				*p = ' ';
+		}
+		itr = p;
+	}
+
+	*itr = '\0';
+
+	return s;
+}
+
+static void kmod_config_free_softdep(struct kmod_config *config,
+							struct kmod_list *l)
+{
+	free(l->data);
+	config->softdeps = kmod_list_remove(l);
+}
+
+static void kcmdline_parse_result(struct kmod_config *config, char *modname,
+						char *param, char *value)
+{
+	if (modname == NULL || param == NULL)
+		return;
+
+	DBG(config->ctx, "%s %s\n", modname, param);
+
+	if (streq(modname, "modprobe") && !strncmp(param, "blacklist=", 10)) {
+		for (;;) {
+			char *t = strsep(&value, ",");
+			if (t == NULL)
+				break;
+
+			kmod_config_add_blacklist(config, t);
+		}
+	} else {
+		if (underscores(modname) < 0) {
+			ERR(config->ctx, "Ignoring bad option on kernel command line while parsing module name: '%s'\n",
+			    modname);
+		} else {
+			kmod_config_add_options(config, modname, param);
+		}
+	}
+}
+
+static int kmod_config_parse_kcmdline(struct kmod_config *config)
+{
+	char buf[KCMD_LINE_SIZE];
+	int fd, err;
+	char *p, *p_quote_start, *modname,  *param = NULL, *value = NULL;
+	bool is_quoted = false, iter = true;
+	enum state {
+		STATE_IGNORE,
+		STATE_MODNAME,
+		STATE_PARAM,
+		STATE_VALUE,
+		STATE_COMPLETE,
+	} state;
+
+	fd = open("/proc/cmdline", O_RDONLY|O_CLOEXEC);
+	if (fd < 0) {
+		err = -errno;
+		DBG(config->ctx, "could not open '/proc/cmdline' for reading: %m\n");
+		return err;
+	}
+
+	err = read_str_safe(fd, buf, sizeof(buf));
+	close(fd);
+	if (err < 0) {
+		ERR(config->ctx, "could not read from '/proc/cmdline': %s\n",
+							strerror(-err));
+		return err;
+	}
+
+	state = STATE_MODNAME;
+	p_quote_start = NULL;
+	for (p = buf, modname = buf; iter; p++) {
+		switch (*p) {
+		case '"':
+			is_quoted = !is_quoted;
+
+			/*
+			 * only allow starting quote as first char when looking
+			 * for a modname: anything else is considered ill-formed
+			 */
+			if (is_quoted && state == STATE_MODNAME && p == modname) {
+				p_quote_start = p;
+				modname = p + 1;
+			} else if (state != STATE_VALUE) {
+				state = STATE_IGNORE;
+			}
+
+			break;
+		case '\0':
+			iter = false;
+			/* fall-through */
+		case ' ':
+		case '\n':
+		case '\t':
+		case '\v':
+		case '\f':
+		case '\r':
+			if (is_quoted && state == STATE_VALUE) {
+				/* no state change*/;
+			} else if (is_quoted) {
+				/* spaces are only allowed in the value part */
+				state = STATE_IGNORE;
+			} else if (state == STATE_VALUE || state == STATE_PARAM) {
+				*p = '\0';
+				state = STATE_COMPLETE;
+			} else {
+				/*
+				 * go to next option, ignoring any possible
+				 * partial match we have
+				 */
+				modname = p + 1;
+				state = STATE_MODNAME;
+				p_quote_start = NULL;
+			}
+			break;
+		case '.':
+			if (state == STATE_MODNAME) {
+				*p = '\0';
+				param = p + 1;
+				state = STATE_PARAM;
+			} else if (state == STATE_PARAM) {
+				state = STATE_IGNORE;
+			}
+			break;
+		case '=':
+			if (state == STATE_PARAM) {
+				/*
+				 * Don't set *p to '\0': the value var shadows
+				 * param
+				 */
+				value = p + 1;
+				state = STATE_VALUE;
+			} else if (state == STATE_MODNAME) {
+				state = STATE_IGNORE;
+			}
+			break;
+		}
+
+		if (state == STATE_COMPLETE) {
+			/*
+			 * We may need to re-quote to unmangle what the
+			 * bootloader passed. Example: grub passes the option as
+			 * "parport.dyndbg=file drivers/parport/ieee1284_ops.c +mpf"
+			 * instead of
+			 * parport.dyndbg="file drivers/parport/ieee1284_ops.c +mpf"
+			 */
+			if (p_quote_start && p_quote_start < modname) {
+				/*
+				 * p_quote_start
+				 * |
+				 * |modname  param  value
+				 * ||        |      |
+				 * vv        v      v
+				 * "parport\0dyndbg=file drivers/parport/ieee1284_ops.c +mpf" */
+				memmove(p_quote_start, modname, value - modname);
+				value--; modname--; param--;
+				*value = '"';
+			}
+			kcmdline_parse_result(config, modname, param, value);
+			/* start over on next iteration */
+			modname = p + 1;
+			state = STATE_MODNAME;
+			p_quote_start = NULL;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Take an fd and own it. It will be closed on return. filename is used only
+ * for debug messages
+ */
+static int kmod_config_parse(struct kmod_config *config, int fd,
+							const char *filename)
+{
+	struct kmod_ctx *ctx = config->ctx;
+	char *line;
+	FILE *fp;
+	unsigned int linenum = 0;
+	int err;
+
+	fp = fdopen(fd, "r");
+	if (fp == NULL) {
+		err = -errno;
+		ERR(config->ctx, "fd %d: %m\n", fd);
+		close(fd);
+		return err;
+	}
+
+	while ((line = freadline_wrapped(fp, &linenum)) != NULL) {
+		char *cmd, *saveptr;
+
+		if (line[0] == '\0' || line[0] == '#')
+			goto done_next;
+
+		cmd = strtok_r(line, "\t ", &saveptr);
+		if (cmd == NULL)
+			goto done_next;
+
+		if (streq(cmd, "alias")) {
+			char *alias = strtok_r(NULL, "\t ", &saveptr);
+			char *modname = strtok_r(NULL, "\t ", &saveptr);
+
+			if (underscores(alias) < 0 || underscores(modname) < 0)
+				goto syntax_error;
+
+			kmod_config_add_alias(config, alias, modname);
+		} else if (streq(cmd, "blacklist")) {
+			char *modname = strtok_r(NULL, "\t ", &saveptr);
+
+			if (underscores(modname) < 0)
+				goto syntax_error;
+
+			kmod_config_add_blacklist(config, modname);
+		} else if (streq(cmd, "options")) {
+			char *modname = strtok_r(NULL, "\t ", &saveptr);
+			char *options = strtok_r(NULL, "\0", &saveptr);
+
+			if (underscores(modname) < 0 || options == NULL)
+				goto syntax_error;
+
+			kmod_config_add_options(config, modname, options);
+		} else if (streq(cmd, "install")) {
+			char *modname = strtok_r(NULL, "\t ", &saveptr);
+			char *installcmd = strtok_r(NULL, "\0", &saveptr);
+
+			if (underscores(modname) < 0 || installcmd == NULL)
+				goto syntax_error;
+
+			kmod_config_add_command(config, modname, installcmd,
+					cmd, &config->install_commands);
+		} else if (streq(cmd, "remove")) {
+			char *modname = strtok_r(NULL, "\t ", &saveptr);
+			char *removecmd = strtok_r(NULL, "\0", &saveptr);
+
+			if (underscores(modname) < 0 || removecmd == NULL)
+				goto syntax_error;
+
+			kmod_config_add_command(config, modname, removecmd,
+					cmd, &config->remove_commands);
+		} else if (streq(cmd, "softdep")) {
+			char *modname = strtok_r(NULL, "\t ", &saveptr);
+			char *softdeps = strtok_r(NULL, "\0", &saveptr);
+
+			if (underscores(modname) < 0 || softdeps == NULL)
+				goto syntax_error;
+
+			kmod_config_add_softdep(config, modname, softdeps);
+		} else if (streq(cmd, "include")
+				|| streq(cmd, "config")) {
+			ERR(ctx, "%s: command %s is deprecated and not parsed anymore\n",
+								filename, cmd);
+		} else {
+syntax_error:
+			ERR(ctx, "%s line %u: ignoring bad line starting with '%s'\n",
+						filename, linenum, cmd);
+		}
+
+done_next:
+		free(line);
+	}
+
+	fclose(fp);
+
+	return 0;
+}
+
+void kmod_config_free(struct kmod_config *config)
+{
+	while (config->aliases)
+		kmod_config_free_alias(config, config->aliases);
+
+	while (config->blacklists)
+		kmod_config_free_blacklist(config, config->blacklists);
+
+	while (config->options)
+		kmod_config_free_options(config, config->options);
+
+	while (config->install_commands) {
+		kmod_config_free_command(config, config->install_commands,
+						&config->install_commands);
+	}
+
+	while (config->remove_commands) {
+		kmod_config_free_command(config, config->remove_commands,
+						&config->remove_commands);
+	}
+
+	while (config->softdeps)
+		kmod_config_free_softdep(config, config->softdeps);
+
+	for (; config->paths != NULL;
+				config->paths = kmod_list_remove(config->paths))
+		free(config->paths->data);
+
+	free(config);
+}
+
+static bool conf_files_filter_out(struct kmod_ctx *ctx, DIR *d,
+					const char *path, const char *fn)
+{
+	size_t len = strlen(fn);
+	struct stat st;
+
+	if (fn[0] == '.')
+		return true;
+
+	if (len < 6 || (!streq(&fn[len - 5], ".conf")
+				&& !streq(&fn[len - 6], ".alias")))
+		return true;
+
+	fstatat(dirfd(d), fn, &st, 0);
+
+	if (S_ISDIR(st.st_mode)) {
+		ERR(ctx, "Directories inside directories are not supported: "
+							"%s/%s\n", path, fn);
+		return true;
+	}
+
+	return false;
+}
+
+struct conf_file {
+	const char *path;
+	bool is_single;
+	char name[];
+};
+
+static int conf_files_insert_sorted(struct kmod_ctx *ctx,
+					struct kmod_list **list,
+					const char *path, const char *name)
+{
+	struct kmod_list *lpos, *tmp;
+	struct conf_file *cf;
+	size_t namelen;
+	int cmp = -1;
+	bool is_single = false;
+
+	if (name == NULL) {
+		name = basename(path);
+		is_single = true;
+	}
+
+	kmod_list_foreach(lpos, *list) {
+		cf = lpos->data;
+
+		if ((cmp = strcmp(name, cf->name)) <= 0)
+			break;
+	}
+
+	if (cmp == 0) {
+		DBG(ctx, "Ignoring duplicate config file: %s/%s\n", path,
+									name);
+		return -EEXIST;
+	}
+
+	namelen = strlen(name);
+	cf = malloc(sizeof(*cf) + namelen + 1);
+	if (cf == NULL)
+		return -ENOMEM;
+
+	memcpy(cf->name, name, namelen + 1);
+	cf->path = path;
+	cf->is_single = is_single;
+
+	if (lpos == NULL)
+		tmp = kmod_list_append(*list, cf);
+	else if (lpos == *list)
+		tmp = kmod_list_prepend(*list, cf);
+	else
+		tmp = kmod_list_insert_before(lpos, cf);
+
+	if (tmp == NULL) {
+		free(cf);
+		return -ENOMEM;
+	}
+
+	if (lpos == NULL || lpos == *list)
+		*list = tmp;
+
+	return 0;
+}
+
+/*
+ * Insert configuration files in @list, ignoring duplicates
+ */
+static int conf_files_list(struct kmod_ctx *ctx, struct kmod_list **list,
+						const char *path,
+						unsigned long long *path_stamp)
+{
+	DIR *d;
+	int err;
+	struct stat st;
+	struct dirent *dent;
+
+	if (stat(path, &st) != 0) {
+		err = -errno;
+		DBG(ctx, "could not stat '%s': %m\n", path);
+		return err;
+	}
+
+	*path_stamp = stat_mstamp(&st);
+
+	if (!S_ISDIR(st.st_mode)) {
+		conf_files_insert_sorted(ctx, list, path, NULL);
+		return 0;
+	}
+
+	d = opendir(path);
+	if (d == NULL) {
+		ERR(ctx, "opendir(%s): %m\n", path);
+		return -EINVAL;
+	}
+
+	for (dent = readdir(d); dent != NULL; dent = readdir(d)) {
+		if (conf_files_filter_out(ctx, d, path, dent->d_name))
+			continue;
+
+		conf_files_insert_sorted(ctx, list, path, dent->d_name);
+	}
+
+	closedir(d);
+	return 0;
+}
+
+int kmod_config_new(struct kmod_ctx *ctx, struct kmod_config **p_config,
+					const char * const *config_paths)
+{
+	struct kmod_config *config;
+	struct kmod_list *list = NULL;
+	struct kmod_list *path_list = NULL;
+	size_t i;
+
+	conf_files_insert_sorted(ctx, &list, kmod_get_dirname(ctx), "modules.softdep");
+
+	for (i = 0; config_paths[i] != NULL; i++) {
+		const char *path = config_paths[i];
+		unsigned long long path_stamp = 0;
+		size_t pathlen;
+		struct kmod_list *tmp;
+		struct kmod_config_path *cf;
+
+		if (conf_files_list(ctx, &list, path, &path_stamp) < 0)
+			continue;
+
+		pathlen = strlen(path) + 1;
+		cf = malloc(sizeof(*cf) + pathlen);
+		if (cf == NULL)
+			goto oom;
+
+		cf->stamp = path_stamp;
+		memcpy(cf->path, path, pathlen);
+
+		tmp = kmod_list_append(path_list, cf);
+		if (tmp == NULL) {
+			free(cf);
+			goto oom;
+		}
+		path_list = tmp;
+	}
+
+	*p_config = config = calloc(1, sizeof(struct kmod_config));
+	if (config == NULL)
+		goto oom;
+
+	config->paths = path_list;
+	config->ctx = ctx;
+
+	for (; list != NULL; list = kmod_list_remove(list)) {
+		char buf[PATH_MAX];
+		const char *fn = buf;
+		struct conf_file *cf = list->data;
+		int fd;
+
+		if (cf->is_single) {
+			fn = cf->path;
+		} else if (snprintf(buf, sizeof(buf), "%s/%s",
+				    cf->path, cf->name) >= (int)sizeof(buf)) {
+			ERR(ctx, "Error parsing %s/%s: path too long\n",
+			    cf->path, cf->name);
+			free(cf);
+			continue;
+		}
+
+		fd = open(fn, O_RDONLY|O_CLOEXEC);
+		DBG(ctx, "parsing file '%s' fd=%d\n", fn, fd);
+
+		if (fd >= 0)
+			kmod_config_parse(config, fd, fn);
+
+		free(cf);
+	}
+
+	kmod_config_parse_kcmdline(config);
+
+	return 0;
+
+oom:
+	for (; list != NULL; list = kmod_list_remove(list))
+		free(list->data);
+
+	for (; path_list != NULL; path_list = kmod_list_remove(path_list))
+		free(path_list->data);
+
+	return -ENOMEM;
+}
+
+/**********************************************************************
+ * struct kmod_config_iter functions
+ **********************************************************************/
+
+enum config_type {
+	CONFIG_TYPE_BLACKLIST = 0,
+	CONFIG_TYPE_INSTALL,
+	CONFIG_TYPE_REMOVE,
+	CONFIG_TYPE_ALIAS,
+	CONFIG_TYPE_OPTION,
+	CONFIG_TYPE_SOFTDEP,
+};
+
+struct kmod_config_iter {
+	enum config_type type;
+	bool intermediate;
+	const struct kmod_list *list;
+	const struct kmod_list *curr;
+	void *data;
+	const char *(*get_key)(const struct kmod_list *l);
+	const char *(*get_value)(const struct kmod_list *l);
+};
+
+static const char *softdep_get_plain_softdep(const struct kmod_list *l)
+{
+	char *s = softdep_to_char(l->data);
+	return s;
+}
+
+static struct kmod_config_iter *kmod_config_iter_new(const struct kmod_ctx* ctx,
+							enum config_type type)
+{
+	struct kmod_config_iter *iter = calloc(1, sizeof(*iter));
+	const struct kmod_config *config = kmod_get_config(ctx);
+
+	if (iter == NULL)
+		return NULL;
+
+	iter->type = type;
+
+	switch (type) {
+	case CONFIG_TYPE_BLACKLIST:
+		iter->list = config->blacklists;
+		iter->get_key = kmod_blacklist_get_modname;
+		break;
+	case CONFIG_TYPE_INSTALL:
+		iter->list = config->install_commands;
+		iter->get_key = kmod_command_get_modname;
+		iter->get_value = kmod_command_get_command;
+		break;
+	case CONFIG_TYPE_REMOVE:
+		iter->list = config->remove_commands;
+		iter->get_key = kmod_command_get_modname;
+		iter->get_value = kmod_command_get_command;
+		break;
+	case CONFIG_TYPE_ALIAS:
+		iter->list = config->aliases;
+		iter->get_key = kmod_alias_get_name;
+		iter->get_value = kmod_alias_get_modname;
+		break;
+	case CONFIG_TYPE_OPTION:
+		iter->list = config->options;
+		iter->get_key = kmod_option_get_modname;
+		iter->get_value = kmod_option_get_options;
+		break;
+	case CONFIG_TYPE_SOFTDEP:
+		iter->list = config->softdeps;
+		iter->get_key = kmod_softdep_get_name;
+		iter->get_value = softdep_get_plain_softdep;
+		iter->intermediate = true;
+		break;
+	}
+
+	return iter;
+}
+
+/**
+ * SECTION:libkmod-config
+ * @short_description: retrieve current libkmod configuration
+ */
+
+/**
+ * kmod_config_get_blacklists:
+ * @ctx: kmod library context
+ *
+ * Retrieve an iterator to deal with the blacklist maintained inside the
+ * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and
+ * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must
+ * be made to initialize the iterator and check if it's valid.
+ *
+ * Returns: a new iterator over the blacklists or NULL on failure. Free it
+ * with kmod_config_iter_free_iter().
+ */
+KMOD_EXPORT struct kmod_config_iter *kmod_config_get_blacklists(const struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;;
+
+	return kmod_config_iter_new(ctx, CONFIG_TYPE_BLACKLIST);
+}
+
+/**
+ * kmod_config_get_install_commands:
+ * @ctx: kmod library context
+ *
+ * Retrieve an iterator to deal with the install commands maintained inside the
+ * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and
+ * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must
+ * be made to initialize the iterator and check if it's valid.
+ *
+ * Returns: a new iterator over the install commands or NULL on failure. Free
+ * it with kmod_config_iter_free_iter().
+ */
+KMOD_EXPORT struct kmod_config_iter *kmod_config_get_install_commands(const struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;;
+
+	return kmod_config_iter_new(ctx, CONFIG_TYPE_INSTALL);
+}
+
+/**
+ * kmod_config_get_remove_commands:
+ * @ctx: kmod library context
+ *
+ * Retrieve an iterator to deal with the remove commands maintained inside the
+ * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and
+ * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must
+ * be made to initialize the iterator and check if it's valid.
+ *
+ * Returns: a new iterator over the remove commands or NULL on failure. Free
+ * it with kmod_config_iter_free_iter().
+ */
+KMOD_EXPORT struct kmod_config_iter *kmod_config_get_remove_commands(const struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;;
+
+	return kmod_config_iter_new(ctx, CONFIG_TYPE_REMOVE);
+}
+
+/**
+ * kmod_config_get_aliases:
+ * @ctx: kmod library context
+ *
+ * Retrieve an iterator to deal with the aliases maintained inside the
+ * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and
+ * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must
+ * be made to initialize the iterator and check if it's valid.
+ *
+ * Returns: a new iterator over the aliases or NULL on failure. Free it with
+ * kmod_config_iter_free_iter().
+ */
+KMOD_EXPORT struct kmod_config_iter *kmod_config_get_aliases(const struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;;
+
+	return kmod_config_iter_new(ctx, CONFIG_TYPE_ALIAS);
+}
+
+/**
+ * kmod_config_get_options:
+ * @ctx: kmod library context
+ *
+ * Retrieve an iterator to deal with the options maintained inside the
+ * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and
+ * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must
+ * be made to initialize the iterator and check if it's valid.
+ *
+ * Returns: a new iterator over the options or NULL on failure. Free it with
+ * kmod_config_iter_free_iter().
+ */
+KMOD_EXPORT struct kmod_config_iter *kmod_config_get_options(const struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;;
+
+	return kmod_config_iter_new(ctx, CONFIG_TYPE_OPTION);
+}
+
+/**
+ * kmod_config_get_softdeps:
+ * @ctx: kmod library context
+ *
+ * Retrieve an iterator to deal with the softdeps maintained inside the
+ * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and
+ * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must
+ * be made to initialize the iterator and check if it's valid.
+ *
+ * Returns: a new iterator over the softdeps or NULL on failure. Free it with
+ * kmod_config_iter_free_iter().
+ */
+KMOD_EXPORT struct kmod_config_iter *kmod_config_get_softdeps(const struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;;
+
+	return kmod_config_iter_new(ctx, CONFIG_TYPE_SOFTDEP);
+}
+
+/**
+ * kmod_config_iter_get_key:
+ * @iter: iterator over a certain configuration
+ *
+ * When using a new allocated iterator, user must perform a call to
+ * kmod_config_iter_next() to initialize iterator's position and check if it's
+ * valid.
+ *
+ * Returns: the key of the current configuration pointed by @iter.
+ */
+KMOD_EXPORT const char *kmod_config_iter_get_key(const struct kmod_config_iter *iter)
+{
+	if (iter == NULL || iter->curr == NULL)
+		return NULL;
+
+	return iter->get_key(iter->curr);
+}
+
+/**
+ * kmod_config_iter_get_value:
+ * @iter: iterator over a certain configuration
+ *
+ * When using a new allocated iterator, user must perform a call to
+ * kmod_config_iter_next() to initialize iterator's position and check if it's
+ * valid.
+ *
+ * Returns: the value of the current configuration pointed by @iter.
+ */
+KMOD_EXPORT const char *kmod_config_iter_get_value(const struct kmod_config_iter *iter)
+{
+	const char *s;
+
+	if (iter == NULL || iter->curr == NULL)
+		return NULL;
+
+	if (iter->get_value == NULL)
+		return NULL;
+
+	if (iter->intermediate) {
+		struct kmod_config_iter *i = (struct kmod_config_iter *)iter;
+
+		free(i->data);
+		s = i->data = (void *) iter->get_value(iter->curr);
+	} else
+		s = iter->get_value(iter->curr);
+
+	return s;
+}
+
+/**
+ * kmod_config_iter_next:
+ * @iter: iterator over a certain configuration
+ *
+ * Make @iter point to the next item of a certain configuration. It's an
+ * automatically recycling iterator. When it reaches the end, false is
+ * returned; then if user wants to iterate again, it's sufficient to call this
+ * function once more.
+ *
+ * Returns: true if next position of @iter is valid or false if its end is
+ * reached.
+ */
+KMOD_EXPORT bool kmod_config_iter_next(struct kmod_config_iter *iter)
+{
+	if (iter == NULL)
+		return false;
+
+	if (iter->curr == NULL) {
+		iter->curr = iter->list;
+		return iter->curr != NULL;
+	}
+
+	iter->curr = kmod_list_next(iter->list, iter->curr);
+
+	return iter->curr != NULL;
+}
+
+/**
+ * kmod_config_iter_free_iter:
+ * @iter: iterator over a certain configuration
+ *
+ * Free resources used by the iterator.
+ */
+KMOD_EXPORT void kmod_config_iter_free_iter(struct kmod_config_iter *iter)
+{
+	free(iter->data);
+	free(iter);
+}
diff --git a/libkmod/libkmod-elf.c b/libkmod/libkmod-elf.c
new file mode 100644
index 0000000..933825b
--- /dev/null
+++ b/libkmod/libkmod-elf.c
@@ -0,0 +1,1219 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <elf.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <shared/util.h>
+
+#include "libkmod.h"
+#include "libkmod-internal.h"
+
+enum kmod_elf_class {
+	KMOD_ELF_32 = (1 << 1),
+	KMOD_ELF_64 = (1 << 2),
+	KMOD_ELF_LSB = (1 << 3),
+	KMOD_ELF_MSB = (1 << 4)
+};
+
+/* as defined in module-init-tools */
+struct kmod_modversion32 {
+	uint32_t crc;
+	char name[64 - sizeof(uint32_t)];
+};
+
+struct kmod_modversion64 {
+	uint64_t crc;
+	char name[64 - sizeof(uint64_t)];
+};
+
+struct kmod_elf {
+	const uint8_t *memory;
+	uint8_t *changed;
+	uint64_t size;
+	enum kmod_elf_class class;
+	struct kmod_elf_header {
+		struct {
+			uint64_t offset;
+			uint16_t count;
+			uint16_t entry_size;
+		} section;
+		struct {
+			uint16_t section; /* index of the strings section */
+			uint64_t size;
+			uint64_t offset;
+			uint32_t nameoff; /* offset in strings itself */
+		} strings;
+		uint16_t machine;
+	} header;
+};
+
+//#define ENABLE_ELFDBG 1
+
+#if defined(ENABLE_LOGGING) && defined(ENABLE_ELFDBG)
+#define ELFDBG(elf, ...)			\
+	_elf_dbg(elf, __FILE__, __LINE__, __func__, __VA_ARGS__);
+
+static inline void _elf_dbg(const struct kmod_elf *elf, const char *fname, unsigned line, const char *func, const char *fmt, ...)
+{
+	va_list args;
+
+	fprintf(stderr, "ELFDBG-%d%c: %s:%u %s() ",
+		(elf->class & KMOD_ELF_32) ? 32 : 64,
+		(elf->class & KMOD_ELF_MSB) ? 'M' : 'L',
+		fname, line, func);
+	va_start(args, fmt);
+	vfprintf(stderr, fmt, args);
+	va_end(args);
+}
+#else
+#define ELFDBG(elf, ...)
+#endif
+
+
+static int elf_identify(const void *memory, uint64_t size)
+{
+	const uint8_t *p = memory;
+	int class = 0;
+
+	if (size <= EI_NIDENT || memcmp(p, ELFMAG, SELFMAG) != 0)
+		return -ENOEXEC;
+
+	switch (p[EI_CLASS]) {
+	case ELFCLASS32:
+		if (size <= sizeof(Elf32_Ehdr))
+			return -EINVAL;
+		class |= KMOD_ELF_32;
+		break;
+	case ELFCLASS64:
+		if (size <= sizeof(Elf64_Ehdr))
+			return -EINVAL;
+		class |= KMOD_ELF_64;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (p[EI_DATA]) {
+	case ELFDATA2LSB:
+		class |= KMOD_ELF_LSB;
+		break;
+	case ELFDATA2MSB:
+		class |= KMOD_ELF_MSB;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return class;
+}
+
+static inline uint64_t elf_get_uint(const struct kmod_elf *elf, uint64_t offset, uint16_t size)
+{
+	const uint8_t *p;
+	uint64_t ret = 0;
+	size_t i;
+
+	assert(size <= sizeof(uint64_t));
+	assert(offset + size <= elf->size);
+	if (offset + size > elf->size) {
+		ELFDBG(elf, "out of bounds: %"PRIu64" + %"PRIu16" = %"PRIu64"> %"PRIu64" (ELF size)\n",
+		       offset, size, offset + size, elf->size);
+		return (uint64_t)-1;
+	}
+
+	p = elf->memory + offset;
+	if (elf->class & KMOD_ELF_MSB) {
+		for (i = 0; i < size; i++)
+			ret = (ret << 8) | p[i];
+	} else {
+		for (i = 1; i <= size; i++)
+			ret = (ret << 8) | p[size - i];
+	}
+
+	ELFDBG(elf, "size=%"PRIu16" offset=%"PRIu64" value=%"PRIu64"\n",
+	       size, offset, ret);
+
+	return ret;
+}
+
+static inline int elf_set_uint(struct kmod_elf *elf, uint64_t offset, uint64_t size, uint64_t value)
+{
+	uint8_t *p;
+	size_t i;
+
+	ELFDBG(elf, "size=%"PRIu16" offset=%"PRIu64" value=%"PRIu64" write memory=%p\n",
+	       size, offset, value, elf->changed);
+
+	assert(size <= sizeof(uint64_t));
+	assert(offset + size <= elf->size);
+	if (offset + size > elf->size) {
+		ELFDBG(elf, "out of bounds: %"PRIu64" + %"PRIu16" = %"PRIu64"> %"PRIu64" (ELF size)\n",
+		       offset, size, offset + size, elf->size);
+		return -1;
+	}
+
+	if (elf->changed == NULL) {
+		elf->changed = malloc(elf->size);
+		if (elf->changed == NULL)
+			return -errno;
+		memcpy(elf->changed, elf->memory, elf->size);
+		elf->memory = elf->changed;
+		ELFDBG(elf, "copied memory to allow writing.\n");
+	}
+
+	p = elf->changed + offset;
+	if (elf->class & KMOD_ELF_MSB) {
+		for (i = 1; i <= size; i++) {
+			p[size - i] = value & 0xff;
+			value = (value & 0xffffffffffffff00) >> 8;
+		}
+	} else {
+		for (i = 0; i < size; i++) {
+			p[i] = value & 0xff;
+			value = (value & 0xffffffffffffff00) >> 8;
+		}
+	}
+
+	return 0;
+}
+
+static inline const void *elf_get_mem(const struct kmod_elf *elf, uint64_t offset)
+{
+	assert(offset < elf->size);
+	if (offset >= elf->size) {
+		ELFDBG(elf, "out-of-bounds: %"PRIu64" >= %"PRIu64" (ELF size)\n",
+		       offset, elf->size);
+		return NULL;
+	}
+	return elf->memory + offset;
+}
+
+static inline const void *elf_get_section_header(const struct kmod_elf *elf, uint16_t idx)
+{
+	assert(idx != SHN_UNDEF);
+	assert(idx < elf->header.section.count);
+	if (idx == SHN_UNDEF || idx >= elf->header.section.count) {
+		ELFDBG(elf, "invalid section number: %"PRIu16", last=%"PRIu16"\n",
+		       idx, elf->header.section.count);
+		return NULL;
+	}
+	return elf_get_mem(elf, elf->header.section.offset +
+			   (uint64_t)(idx * elf->header.section.entry_size));
+}
+
+static inline int elf_get_section_info(const struct kmod_elf *elf, uint16_t idx, uint64_t *offset, uint64_t *size, uint32_t *nameoff)
+{
+	const uint8_t *p = elf_get_section_header(elf, idx);
+	uint64_t min_size, off = p - elf->memory;
+
+	if (p == NULL) {
+		ELFDBG(elf, "no section at %"PRIu16"\n", idx);
+		*offset = 0;
+		*size = 0;
+		*nameoff = 0;
+		return -EINVAL;
+	}
+
+#define READV(field) \
+	elf_get_uint(elf, off + offsetof(typeof(*hdr), field), sizeof(hdr->field))
+
+	if (elf->class & KMOD_ELF_32) {
+		const Elf32_Shdr *hdr _unused_ = (const Elf32_Shdr *)p;
+		*size = READV(sh_size);
+		*offset = READV(sh_offset);
+		*nameoff = READV(sh_name);
+	} else {
+		const Elf64_Shdr *hdr _unused_ = (const Elf64_Shdr *)p;
+		*size = READV(sh_size);
+		*offset = READV(sh_offset);
+		*nameoff = READV(sh_name);
+	}
+#undef READV
+
+	if (addu64_overflow(*offset, *size, &min_size)
+	    || min_size > elf->size) {
+		ELFDBG(elf, "out-of-bounds: %"PRIu64" >= %"PRIu64" (ELF size)\n",
+		       min_size, elf->size);
+		return -EINVAL;
+	}
+
+	ELFDBG(elf, "section=%"PRIu16" is: offset=%"PRIu64" size=%"PRIu64" nameoff=%"PRIu32"\n",
+	       idx, *offset, *size, *nameoff);
+
+	return 0;
+}
+
+static const char *elf_get_strings_section(const struct kmod_elf *elf, uint64_t *size)
+{
+	*size = elf->header.strings.size;
+	return elf_get_mem(elf, elf->header.strings.offset);
+}
+
+struct kmod_elf *kmod_elf_new(const void *memory, off_t size)
+{
+	struct kmod_elf *elf;
+	uint64_t min_size;
+	size_t shdrs_size, shdr_size;
+	int class;
+
+	assert_cc(sizeof(uint16_t) == sizeof(Elf32_Half));
+	assert_cc(sizeof(uint16_t) == sizeof(Elf64_Half));
+	assert_cc(sizeof(uint32_t) == sizeof(Elf32_Word));
+	assert_cc(sizeof(uint32_t) == sizeof(Elf64_Word));
+
+	if (!memory) {
+		errno = -EINVAL;
+		return NULL;
+	}
+
+	class = elf_identify(memory, size);
+	if (class < 0) {
+		errno = -class;
+		return NULL;
+	}
+
+	elf = malloc(sizeof(struct kmod_elf));
+	if (elf == NULL) {
+		return NULL;
+	}
+
+	elf->memory = memory;
+	elf->changed = NULL;
+	elf->size = size;
+	elf->class = class;
+
+#define READV(field) \
+	elf_get_uint(elf, offsetof(typeof(*hdr), field), sizeof(hdr->field))
+
+#define LOAD_HEADER						\
+	elf->header.section.offset = READV(e_shoff);		\
+	elf->header.section.count = READV(e_shnum);		\
+	elf->header.section.entry_size = READV(e_shentsize);	\
+	elf->header.strings.section = READV(e_shstrndx);	\
+	elf->header.machine = READV(e_machine)
+	if (elf->class & KMOD_ELF_32) {
+		const Elf32_Ehdr *hdr _unused_ = elf_get_mem(elf, 0);
+		LOAD_HEADER;
+		shdr_size = sizeof(Elf32_Shdr);
+	} else {
+		const Elf64_Ehdr *hdr _unused_ = elf_get_mem(elf, 0);
+		LOAD_HEADER;
+		shdr_size = sizeof(Elf64_Shdr);
+	}
+#undef LOAD_HEADER
+#undef READV
+
+	ELFDBG(elf, "section: offset=%"PRIu64" count=%"PRIu16" entry_size=%"PRIu16" strings index=%"PRIu16"\n",
+	       elf->header.section.offset,
+	       elf->header.section.count,
+	       elf->header.section.entry_size,
+	       elf->header.strings.section);
+
+	if (elf->header.section.entry_size != shdr_size) {
+		ELFDBG(elf, "unexpected section entry size: %"PRIu16", expected %"PRIu16"\n",
+		       elf->header.section.entry_size, shdr_size);
+		goto invalid;
+	}
+	shdrs_size = shdr_size * elf->header.section.count;
+	if (addu64_overflow(shdrs_size, elf->header.section.offset, &min_size)
+	    || min_size > elf->size) {
+		ELFDBG(elf, "file is too short to hold sections\n");
+		goto invalid;
+	}
+
+	if (elf_get_section_info(elf, elf->header.strings.section,
+					&elf->header.strings.offset,
+					&elf->header.strings.size,
+					&elf->header.strings.nameoff) < 0) {
+		ELFDBG(elf, "could not get strings section\n");
+		goto invalid;
+	} else {
+		uint64_t slen;
+		const char *s = elf_get_strings_section(elf, &slen);
+		if (slen == 0 || s[slen - 1] != '\0') {
+			ELFDBG(elf, "strings section does not ends with \\0\n");
+			goto invalid;
+		}
+	}
+
+	return elf;
+
+invalid:
+	free(elf);
+	errno = EINVAL;
+	return NULL;
+}
+
+void kmod_elf_unref(struct kmod_elf *elf)
+{
+	free(elf->changed);
+	free(elf);
+}
+
+const void *kmod_elf_get_memory(const struct kmod_elf *elf)
+{
+	return elf->memory;
+}
+
+static int elf_find_section(const struct kmod_elf *elf, const char *section)
+{
+	uint64_t nameslen;
+	const char *names = elf_get_strings_section(elf, &nameslen);
+	uint16_t i;
+
+	for (i = 1; i < elf->header.section.count; i++) {
+		uint64_t off, size;
+		uint32_t nameoff;
+		const char *n;
+		int err = elf_get_section_info(elf, i, &off, &size, &nameoff);
+		if (err < 0)
+			continue;
+		if (nameoff >= nameslen)
+			continue;
+		n = names + nameoff;
+		if (!streq(section, n))
+			continue;
+
+		return i;
+	}
+
+	return -ENODATA;
+}
+
+int kmod_elf_get_section(const struct kmod_elf *elf, const char *section, const void **buf, uint64_t *buf_size)
+{
+	uint64_t nameslen;
+	const char *names = elf_get_strings_section(elf, &nameslen);
+	uint16_t i;
+
+	*buf = NULL;
+	*buf_size = 0;
+
+	for (i = 1; i < elf->header.section.count; i++) {
+		uint64_t off, size;
+		uint32_t nameoff;
+		const char *n;
+		int err = elf_get_section_info(elf, i, &off, &size, &nameoff);
+		if (err < 0)
+			continue;
+		if (nameoff >= nameslen)
+			continue;
+		n = names + nameoff;
+		if (!streq(section, n))
+			continue;
+
+		*buf = elf_get_mem(elf, off);
+		*buf_size = size;
+		return 0;
+	}
+
+	return -ENODATA;
+}
+
+/* array will be allocated with strings in a single malloc, just free *array */
+int kmod_elf_get_strings(const struct kmod_elf *elf, const char *section, char ***array)
+{
+	size_t i, j, count;
+	uint64_t size;
+	const void *buf;
+	const char *strings;
+	char *s, **a;
+	int err;
+
+	*array = NULL;
+
+	err = kmod_elf_get_section(elf, section, &buf, &size);
+	if (err < 0)
+		return err;
+
+	strings = buf;
+	if (strings == NULL || size == 0)
+		return 0;
+
+	/* skip zero padding */
+	while (strings[0] == '\0' && size > 1) {
+		strings++;
+		size--;
+	}
+
+	if (size <= 1)
+		return 0;
+
+	for (i = 0, count = 0; i < size; ) {
+		if (strings[i] != '\0') {
+			i++;
+			continue;
+		}
+
+		while (strings[i] == '\0' && i < size)
+			i++;
+
+		count++;
+	}
+
+	if (strings[i - 1] != '\0')
+		count++;
+
+	*array = a = malloc(size + 1 + sizeof(char *) * (count + 1));
+	if (*array == NULL)
+		return -errno;
+
+	s = (char *)(a + count + 1);
+	memcpy(s, strings, size);
+
+	/* make sure the last string is NULL-terminated */
+	s[size] = '\0';
+	a[count] = NULL;
+	a[0] = s;
+
+	for (i = 0, j = 1; j < count && i < size; ) {
+		if (s[i] != '\0') {
+			i++;
+			continue;
+		}
+
+		while (strings[i] == '\0' && i < size)
+			i++;
+
+		a[j] = &s[i];
+		j++;
+	}
+
+	return count;
+}
+
+/* array will be allocated with strings in a single malloc, just free *array */
+int kmod_elf_get_modversions(const struct kmod_elf *elf, struct kmod_modversion **array)
+{
+	size_t off, offcrc, slen;
+	uint64_t size;
+	struct kmod_modversion *a;
+	const void *buf;
+	char *itr;
+	int i, count, err;
+#define MODVERSION_SEC_SIZE (sizeof(struct kmod_modversion64))
+
+	assert_cc(sizeof(struct kmod_modversion64) ==
+					sizeof(struct kmod_modversion32));
+
+	if (elf->class & KMOD_ELF_32)
+		offcrc = sizeof(uint32_t);
+	else
+		offcrc = sizeof(uint64_t);
+
+	*array = NULL;
+
+	err = kmod_elf_get_section(elf, "__versions", &buf, &size);
+	if (err < 0)
+		return err;
+
+	if (buf == NULL || size == 0)
+		return 0;
+
+	if (size % MODVERSION_SEC_SIZE != 0)
+		return -EINVAL;
+
+	count = size / MODVERSION_SEC_SIZE;
+
+	off = (const uint8_t *)buf - elf->memory;
+	slen = 0;
+
+	for (i = 0; i < count; i++, off += MODVERSION_SEC_SIZE) {
+		const char *symbol = elf_get_mem(elf, off + offcrc);
+
+		if (symbol[0] == '.')
+			symbol++;
+
+		slen += strlen(symbol) + 1;
+	}
+
+	*array = a = malloc(sizeof(struct kmod_modversion) * count + slen);
+	if (*array == NULL)
+		return -errno;
+
+	itr = (char *)(a + count);
+	off = (const uint8_t *)buf - elf->memory;
+
+	for (i = 0; i < count; i++, off += MODVERSION_SEC_SIZE) {
+		uint64_t crc = elf_get_uint(elf, off, offcrc);
+		const char *symbol = elf_get_mem(elf, off + offcrc);
+		size_t symbollen;
+
+		if (symbol[0] == '.')
+			symbol++;
+
+		a[i].crc = crc;
+		a[i].bind = KMOD_SYMBOL_UNDEF;
+		a[i].symbol = itr;
+		symbollen = strlen(symbol) + 1;
+		memcpy(itr, symbol, symbollen);
+		itr += symbollen;
+	}
+
+	return count;
+}
+
+int kmod_elf_strip_section(struct kmod_elf *elf, const char *section)
+{
+	uint64_t off, size;
+	const void *buf;
+	int idx = elf_find_section(elf, section);
+	uint64_t val;
+
+	if (idx < 0)
+		return idx;
+
+	buf = elf_get_section_header(elf, idx);
+	off = (const uint8_t *)buf - elf->memory;
+
+	if (elf->class & KMOD_ELF_32) {
+		off += offsetof(Elf32_Shdr, sh_flags);
+		size = sizeof(((Elf32_Shdr *)buf)->sh_flags);
+	} else {
+		off += offsetof(Elf64_Shdr, sh_flags);
+		size = sizeof(((Elf64_Shdr *)buf)->sh_flags);
+	}
+
+	val = elf_get_uint(elf, off, size);
+	val &= ~(uint64_t)SHF_ALLOC;
+
+	return elf_set_uint(elf, off, size, val);
+}
+
+int kmod_elf_strip_vermagic(struct kmod_elf *elf)
+{
+	uint64_t i, size;
+	const void *buf;
+	const char *strings;
+	int err;
+
+	err = kmod_elf_get_section(elf, ".modinfo", &buf, &size);
+	if (err < 0)
+		return err;
+	strings = buf;
+	if (strings == NULL || size == 0)
+		return 0;
+
+	/* skip zero padding */
+	while (strings[0] == '\0' && size > 1) {
+		strings++;
+		size--;
+	}
+	if (size <= 1)
+		return 0;
+
+	for (i = 0; i < size; i++) {
+		const char *s;
+		size_t off, len;
+
+		if (strings[i] == '\0')
+			continue;
+		if (i + 1 >= size)
+			continue;
+
+		s = strings + i;
+		len = sizeof("vermagic=") - 1;
+		if (i + len >= size)
+			continue;
+		if (strncmp(s, "vermagic=", len) != 0) {
+			i += strlen(s);
+			continue;
+		}
+		off = (const uint8_t *)s - elf->memory;
+
+		if (elf->changed == NULL) {
+			elf->changed = malloc(elf->size);
+			if (elf->changed == NULL)
+				return -errno;
+			memcpy(elf->changed, elf->memory, elf->size);
+			elf->memory = elf->changed;
+			ELFDBG(elf, "copied memory to allow writing.\n");
+		}
+
+		len = strlen(s);
+		ELFDBG(elf, "clear .modinfo vermagic \"%s\" (%zd bytes)\n",
+		       s, len);
+		memset(elf->changed + off, '\0', len);
+		return 0;
+	}
+
+	ELFDBG(elf, "no vermagic found in .modinfo\n");
+	return -ENODATA;
+}
+
+
+static int kmod_elf_get_symbols_symtab(const struct kmod_elf *elf, struct kmod_modversion **array)
+{
+	uint64_t i, last, size;
+	const void *buf;
+	const char *strings;
+	char *itr;
+	struct kmod_modversion *a;
+	int count, err;
+
+	*array = NULL;
+
+	err = kmod_elf_get_section(elf, "__ksymtab_strings", &buf, &size);
+	if (err < 0)
+		return err;
+	strings = buf;
+	if (strings == NULL || size == 0)
+		return 0;
+
+	/* skip zero padding */
+	while (strings[0] == '\0' && size > 1) {
+		strings++;
+		size--;
+	}
+	if (size <= 1)
+		return 0;
+
+	last = 0;
+	for (i = 0, count = 0; i < size; i++) {
+		if (strings[i] == '\0') {
+			if (last == i) {
+				last = i + 1;
+				continue;
+			}
+			count++;
+			last = i + 1;
+		}
+	}
+	if (strings[i - 1] != '\0')
+		count++;
+
+	*array = a = malloc(size + 1 + sizeof(struct kmod_modversion) * count);
+	if (*array == NULL)
+		return -errno;
+
+	itr = (char *)(a + count);
+	last = 0;
+	for (i = 0, count = 0; i < size; i++) {
+		if (strings[i] == '\0') {
+			size_t slen = i - last;
+			if (last == i) {
+				last = i + 1;
+				continue;
+			}
+			a[count].crc = 0;
+			a[count].bind = KMOD_SYMBOL_GLOBAL;
+			a[count].symbol = itr;
+			memcpy(itr, strings + last, slen);
+			itr[slen] = '\0';
+			itr += slen + 1;
+			count++;
+			last = i + 1;
+		}
+	}
+	if (strings[i - 1] != '\0') {
+		size_t slen = i - last;
+		a[count].crc = 0;
+		a[count].bind = KMOD_SYMBOL_GLOBAL;
+		a[count].symbol = itr;
+		memcpy(itr, strings + last, slen);
+		itr[slen] = '\0';
+		count++;
+	}
+
+	return count;
+}
+
+static inline uint8_t kmod_symbol_bind_from_elf(uint8_t elf_value)
+{
+	switch (elf_value) {
+	case STB_LOCAL:
+		return KMOD_SYMBOL_LOCAL;
+	case STB_GLOBAL:
+		return KMOD_SYMBOL_GLOBAL;
+	case STB_WEAK:
+		return KMOD_SYMBOL_WEAK;
+	default:
+		return KMOD_SYMBOL_NONE;
+	}
+}
+
+static uint64_t kmod_elf_resolve_crc(const struct kmod_elf *elf, uint64_t crc, uint16_t shndx)
+{
+	int err;
+	uint64_t off, size;
+	uint32_t nameoff;
+
+	if (shndx == SHN_ABS || shndx == SHN_UNDEF)
+		return crc;
+
+	err = elf_get_section_info(elf, shndx, &off, &size, &nameoff);
+	if (err < 0) {
+		ELFDBG("Cound not find section index %"PRIu16" for crc", shndx);
+		return (uint64_t)-1;
+	}
+
+	if (crc > (size - sizeof(uint32_t))) {
+		ELFDBG("CRC offset %"PRIu64" is too big, section %"PRIu16" size is %"PRIu64"\n",
+		       crc, shndx, size);
+		return (uint64_t)-1;
+	}
+
+	crc = elf_get_uint(elf, off + crc, sizeof(uint32_t));
+	return crc;
+}
+
+/* array will be allocated with strings in a single malloc, just free *array */
+int kmod_elf_get_symbols(const struct kmod_elf *elf, struct kmod_modversion **array)
+{
+	static const char crc_str[] = "__crc_";
+	static const size_t crc_strlen = sizeof(crc_str) - 1;
+	uint64_t strtablen, symtablen, str_off, sym_off;
+	const void *strtab, *symtab;
+	struct kmod_modversion *a;
+	char *itr;
+	size_t slen, symlen;
+	int i, count, symcount, err;
+
+	err = kmod_elf_get_section(elf, ".strtab", &strtab, &strtablen);
+	if (err < 0) {
+		ELFDBG(elf, "no .strtab found.\n");
+		goto fallback;
+	}
+
+	err = kmod_elf_get_section(elf, ".symtab", &symtab, &symtablen);
+	if (err < 0) {
+		ELFDBG(elf, "no .symtab found.\n");
+		goto fallback;
+	}
+
+	if (elf->class & KMOD_ELF_32)
+		symlen = sizeof(Elf32_Sym);
+	else
+		symlen = sizeof(Elf64_Sym);
+
+	if (symtablen % symlen != 0) {
+		ELFDBG(elf, "unexpected .symtab of length %"PRIu64", not multiple of %"PRIu64" as expected.\n", symtablen, symlen);
+		goto fallback;
+	}
+
+	symcount = symtablen / symlen;
+	count = 0;
+	slen = 0;
+	str_off = (const uint8_t *)strtab - elf->memory;
+	sym_off = (const uint8_t *)symtab - elf->memory + symlen;
+	for (i = 1; i < symcount; i++, sym_off += symlen) {
+		const char *name;
+		uint32_t name_off;
+
+#define READV(field)							\
+		elf_get_uint(elf, sym_off + offsetof(typeof(*s), field),\
+			     sizeof(s->field))
+		if (elf->class & KMOD_ELF_32) {
+			Elf32_Sym *s;
+			name_off = READV(st_name);
+		} else {
+			Elf64_Sym *s;
+			name_off = READV(st_name);
+		}
+#undef READV
+		if (name_off >= strtablen) {
+			ELFDBG(elf, ".strtab is %"PRIu64" bytes, but .symtab entry %d wants to access offset %"PRIu32".\n", strtablen, i, name_off);
+			goto fallback;
+		}
+
+		name = elf_get_mem(elf, str_off + name_off);
+
+		if (strncmp(name, crc_str, crc_strlen) != 0)
+			continue;
+		slen += strlen(name + crc_strlen) + 1;
+		count++;
+	}
+
+	if (count == 0)
+		goto fallback;
+
+	*array = a = malloc(sizeof(struct kmod_modversion) * count + slen);
+	if (*array == NULL)
+		return -errno;
+
+	itr = (char *)(a + count);
+	count = 0;
+	str_off = (const uint8_t *)strtab - elf->memory;
+	sym_off = (const uint8_t *)symtab - elf->memory + symlen;
+	for (i = 1; i < symcount; i++, sym_off += symlen) {
+		const char *name;
+		uint32_t name_off;
+		uint64_t crc;
+		uint8_t info, bind;
+		uint16_t shndx;
+
+#define READV(field)							\
+		elf_get_uint(elf, sym_off + offsetof(typeof(*s), field),\
+			     sizeof(s->field))
+		if (elf->class & KMOD_ELF_32) {
+			Elf32_Sym *s;
+			name_off = READV(st_name);
+			crc = READV(st_value);
+			info = READV(st_info);
+			shndx = READV(st_shndx);
+		} else {
+			Elf64_Sym *s;
+			name_off = READV(st_name);
+			crc = READV(st_value);
+			info = READV(st_info);
+			shndx = READV(st_shndx);
+		}
+#undef READV
+		name = elf_get_mem(elf, str_off + name_off);
+		if (strncmp(name, crc_str, crc_strlen) != 0)
+			continue;
+		name += crc_strlen;
+
+		if (elf->class & KMOD_ELF_32)
+			bind = ELF32_ST_BIND(info);
+		else
+			bind = ELF64_ST_BIND(info);
+
+		a[count].crc = kmod_elf_resolve_crc(elf, crc, shndx);
+		a[count].bind = kmod_symbol_bind_from_elf(bind);
+		a[count].symbol = itr;
+		slen = strlen(name);
+		memcpy(itr, name, slen);
+		itr[slen] = '\0';
+		itr += slen + 1;
+		count++;
+	}
+	return count;
+
+fallback:
+	ELFDBG(elf, "Falling back to __ksymtab_strings!\n");
+	return kmod_elf_get_symbols_symtab(elf, array);
+}
+
+static int kmod_elf_crc_find(const struct kmod_elf *elf, const void *versions, uint64_t versionslen, const char *name, uint64_t *crc)
+{
+	size_t verlen, crclen, off;
+	uint64_t i;
+
+	if (elf->class & KMOD_ELF_32) {
+		struct kmod_modversion32 *mv;
+		verlen = sizeof(*mv);
+		crclen = sizeof(mv->crc);
+	} else {
+		struct kmod_modversion64 *mv;
+		verlen = sizeof(*mv);
+		crclen = sizeof(mv->crc);
+	}
+
+	off = (const uint8_t *)versions - elf->memory;
+	for (i = 0; i < versionslen; i += verlen) {
+		const char *symbol = elf_get_mem(elf, off + i + crclen);
+		if (!streq(name, symbol))
+			continue;
+		*crc = elf_get_uint(elf, off + i, crclen);
+		return i / verlen;
+	}
+
+	ELFDBG(elf, "could not find crc for symbol '%s'\n", name);
+	*crc = 0;
+	return -1;
+}
+
+/* from module-init-tools:elfops_core.c */
+#ifndef STT_REGISTER
+#define STT_REGISTER    13              /* Global register reserved to app. */
+#endif
+
+/* array will be allocated with strings in a single malloc, just free *array */
+int kmod_elf_get_dependency_symbols(const struct kmod_elf *elf, struct kmod_modversion **array)
+{
+	uint64_t versionslen, strtablen, symtablen, str_off, sym_off, ver_off;
+	const void *versions, *strtab, *symtab;
+	struct kmod_modversion *a;
+	char *itr;
+	size_t slen, verlen, symlen, crclen;
+	int i, count, symcount, vercount, err;
+	bool handle_register_symbols;
+	uint8_t *visited_versions;
+	uint64_t *symcrcs;
+
+	err = kmod_elf_get_section(elf, "__versions", &versions, &versionslen);
+	if (err < 0) {
+		versions = NULL;
+		versionslen = 0;
+		verlen = 0;
+		crclen = 0;
+	} else {
+		if (elf->class & KMOD_ELF_32) {
+			struct kmod_modversion32 *mv;
+			verlen = sizeof(*mv);
+			crclen = sizeof(mv->crc);
+		} else {
+			struct kmod_modversion64 *mv;
+			verlen = sizeof(*mv);
+			crclen = sizeof(mv->crc);
+		}
+		if (versionslen % verlen != 0) {
+			ELFDBG(elf, "unexpected __versions of length %"PRIu64", not multiple of %zd as expected.\n", versionslen, verlen);
+			versions = NULL;
+			versionslen = 0;
+		}
+	}
+
+	err = kmod_elf_get_section(elf, ".strtab", &strtab, &strtablen);
+	if (err < 0) {
+		ELFDBG(elf, "no .strtab found.\n");
+		return -EINVAL;
+	}
+
+	err = kmod_elf_get_section(elf, ".symtab", &symtab, &symtablen);
+	if (err < 0) {
+		ELFDBG(elf, "no .symtab found.\n");
+		return -EINVAL;
+	}
+
+	if (elf->class & KMOD_ELF_32)
+		symlen = sizeof(Elf32_Sym);
+	else
+		symlen = sizeof(Elf64_Sym);
+
+	if (symtablen % symlen != 0) {
+		ELFDBG(elf, "unexpected .symtab of length %"PRIu64", not multiple of %"PRIu64" as expected.\n", symtablen, symlen);
+		return -EINVAL;
+	}
+
+	if (versionslen == 0) {
+		vercount = 0;
+		visited_versions = NULL;
+	} else {
+		vercount = versionslen / verlen;
+		visited_versions = calloc(vercount, sizeof(uint8_t));
+		if (visited_versions == NULL)
+			return -ENOMEM;
+	}
+
+	handle_register_symbols = (elf->header.machine == EM_SPARC ||
+				   elf->header.machine == EM_SPARCV9);
+
+	symcount = symtablen / symlen;
+	count = 0;
+	slen = 0;
+	str_off = (const uint8_t *)strtab - elf->memory;
+	sym_off = (const uint8_t *)symtab - elf->memory + symlen;
+
+	symcrcs = calloc(symcount, sizeof(uint64_t));
+	if (symcrcs == NULL) {
+		free(visited_versions);
+		return -ENOMEM;
+	}
+
+	for (i = 1; i < symcount; i++, sym_off += symlen) {
+		const char *name;
+		uint64_t crc;
+		uint32_t name_off;
+		uint16_t secidx;
+		uint8_t info;
+		int idx;
+
+#define READV(field)							\
+		elf_get_uint(elf, sym_off + offsetof(typeof(*s), field),\
+			     sizeof(s->field))
+		if (elf->class & KMOD_ELF_32) {
+			Elf32_Sym *s;
+			name_off = READV(st_name);
+			secidx = READV(st_shndx);
+			info = READV(st_info);
+		} else {
+			Elf64_Sym *s;
+			name_off = READV(st_name);
+			secidx = READV(st_shndx);
+			info = READV(st_info);
+		}
+#undef READV
+		if (secidx != SHN_UNDEF)
+			continue;
+
+		if (handle_register_symbols) {
+			uint8_t type;
+			if (elf->class & KMOD_ELF_32)
+				type = ELF32_ST_TYPE(info);
+			else
+				type = ELF64_ST_TYPE(info);
+
+			/* Not really undefined: sparc gcc 3.3 creates
+			 * U references when you have global asm
+			 * variables, to avoid anyone else misusing
+			 * them.
+			 */
+			if (type == STT_REGISTER)
+				continue;
+		}
+
+		if (name_off >= strtablen) {
+			ELFDBG(elf, ".strtab is %"PRIu64" bytes, but .symtab entry %d wants to access offset %"PRIu32".\n", strtablen, i, name_off);
+			free(visited_versions);
+			free(symcrcs);
+			return -EINVAL;
+		}
+
+		name = elf_get_mem(elf, str_off + name_off);
+		if (name[0] == '\0') {
+			ELFDBG(elf, "empty symbol name at index %"PRIu64"\n", i);
+			continue;
+		}
+
+		slen += strlen(name) + 1;
+		count++;
+
+		idx = kmod_elf_crc_find(elf, versions, versionslen, name, &crc);
+		if (idx >= 0 && visited_versions != NULL)
+			visited_versions[idx] = 1;
+		symcrcs[i] = crc;
+	}
+
+	if (visited_versions != NULL) {
+		/* module_layout/struct_module are not visited, but needed */
+		ver_off = (const uint8_t *)versions - elf->memory;
+		for (i = 0; i < vercount; i++) {
+			if (visited_versions[i] == 0) {
+				const char *name;
+				name = elf_get_mem(elf, ver_off + i * verlen + crclen);
+				slen += strlen(name) + 1;
+
+				count++;
+			}
+		}
+	}
+
+	if (count == 0) {
+		free(visited_versions);
+		free(symcrcs);
+		*array = NULL;
+		return 0;
+	}
+
+	*array = a = malloc(sizeof(struct kmod_modversion) * count + slen);
+	if (*array == NULL) {
+		free(visited_versions);
+		free(symcrcs);
+		return -errno;
+	}
+
+	itr = (char *)(a + count);
+	count = 0;
+	str_off = (const uint8_t *)strtab - elf->memory;
+	sym_off = (const uint8_t *)symtab - elf->memory + symlen;
+	for (i = 1; i < symcount; i++, sym_off += symlen) {
+		const char *name;
+		uint64_t crc;
+		uint32_t name_off;
+		uint16_t secidx;
+		uint8_t info, bind;
+
+#define READV(field)							\
+		elf_get_uint(elf, sym_off + offsetof(typeof(*s), field),\
+			     sizeof(s->field))
+		if (elf->class & KMOD_ELF_32) {
+			Elf32_Sym *s;
+			name_off = READV(st_name);
+			secidx = READV(st_shndx);
+			info = READV(st_info);
+		} else {
+			Elf64_Sym *s;
+			name_off = READV(st_name);
+			secidx = READV(st_shndx);
+			info = READV(st_info);
+		}
+#undef READV
+		if (secidx != SHN_UNDEF)
+			continue;
+
+		if (handle_register_symbols) {
+			uint8_t type;
+			if (elf->class & KMOD_ELF_32)
+				type = ELF32_ST_TYPE(info);
+			else
+				type = ELF64_ST_TYPE(info);
+
+			/* Not really undefined: sparc gcc 3.3 creates
+			 * U references when you have global asm
+			 * variables, to avoid anyone else misusing
+			 * them.
+			 */
+			if (type == STT_REGISTER)
+				continue;
+		}
+
+		name = elf_get_mem(elf, str_off + name_off);
+		if (name[0] == '\0') {
+			ELFDBG(elf, "empty symbol name at index %"PRIu64"\n", i);
+			continue;
+		}
+
+		if (elf->class & KMOD_ELF_32)
+			bind = ELF32_ST_BIND(info);
+		else
+			bind = ELF64_ST_BIND(info);
+		if (bind == STB_WEAK)
+			bind = KMOD_SYMBOL_WEAK;
+		else
+			bind = KMOD_SYMBOL_UNDEF;
+
+		slen = strlen(name);
+		crc = symcrcs[i];
+
+		a[count].crc = crc;
+		a[count].bind = bind;
+		a[count].symbol = itr;
+		memcpy(itr, name, slen);
+		itr[slen] = '\0';
+		itr += slen + 1;
+
+		count++;
+	}
+
+	free(symcrcs);
+
+	if (visited_versions == NULL)
+		return count;
+
+	/* add unvisited (module_layout/struct_module) */
+	ver_off = (const uint8_t *)versions - elf->memory;
+	for (i = 0; i < vercount; i++) {
+		const char *name;
+		uint64_t crc;
+
+		if (visited_versions[i] != 0)
+			continue;
+
+		name = elf_get_mem(elf, ver_off + i * verlen + crclen);
+		slen = strlen(name);
+		crc = elf_get_uint(elf, ver_off + i * verlen, crclen);
+
+		a[count].crc = crc;
+		a[count].bind = KMOD_SYMBOL_UNDEF;
+		a[count].symbol = itr;
+		memcpy(itr, name, slen);
+		itr[slen] = '\0';
+		itr += slen + 1;
+
+		count++;
+	}
+	free(visited_versions);
+	return count;
+}
diff --git a/libkmod/libkmod-file.c b/libkmod/libkmod-file.c
new file mode 100644
index 0000000..b138e7e
--- /dev/null
+++ b/libkmod/libkmod-file.c
@@ -0,0 +1,541 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#ifdef ENABLE_ZSTD
+#include <zstd.h>
+#endif
+#ifdef ENABLE_XZ
+#include <lzma.h>
+#endif
+#ifdef ENABLE_ZLIB
+#include <zlib.h>
+#endif
+
+#include <shared/util.h>
+
+#include "libkmod.h"
+#include "libkmod-internal.h"
+
+struct kmod_file;
+struct file_ops {
+	int (*load)(struct kmod_file *file);
+	void (*unload)(struct kmod_file *file);
+};
+
+struct kmod_file {
+#ifdef ENABLE_ZSTD
+	bool zstd_used;
+#endif
+#ifdef ENABLE_XZ
+	bool xz_used;
+#endif
+#ifdef ENABLE_ZLIB
+	gzFile gzf;
+#endif
+	int fd;
+	enum kmod_file_compression_type compression;
+	off_t size;
+	void *memory;
+	const struct file_ops *ops;
+	const struct kmod_ctx *ctx;
+	struct kmod_elf *elf;
+};
+
+#ifdef ENABLE_ZSTD
+static int zstd_read_block(struct kmod_file *file, size_t block_size,
+			   ZSTD_inBuffer *input, size_t *input_capacity)
+{
+	ssize_t rdret;
+	int ret;
+
+	if (*input_capacity < block_size) {
+		free((void *)input->src);
+		input->src = malloc(block_size);
+		if (input->src == NULL) {
+			ret = -errno;
+			ERR(file->ctx, "zstd: %m\n");
+			return ret;
+		}
+		*input_capacity = block_size;
+	}
+
+	rdret = read(file->fd, (void *)input->src, block_size);
+	if (rdret < 0) {
+		ret = -errno;
+		ERR(file->ctx, "zstd: %m\n");
+		return ret;
+	}
+
+	input->pos = 0;
+	input->size = rdret;
+	return 0;
+}
+
+static int zstd_ensure_outbuffer_space(ZSTD_outBuffer *buffer, size_t min_free)
+{
+	uint8_t *old_buffer = buffer->dst;
+	int ret = 0;
+
+	if (buffer->size - buffer->pos >= min_free)
+		return 0;
+
+	buffer->size += min_free;
+	buffer->dst = realloc(buffer->dst, buffer->size);
+	if (buffer->dst == NULL) {
+		ret = -errno;
+		free(old_buffer);
+	}
+
+	return ret;
+}
+
+static int zstd_decompress_block(struct kmod_file *file, ZSTD_DStream *dstr,
+				 ZSTD_inBuffer *input, ZSTD_outBuffer *output,
+				 size_t *next_block_size)
+{
+	size_t out_buf_min_size = ZSTD_DStreamOutSize();
+	int ret = 0;
+
+	do {
+		ssize_t dsret;
+
+		ret = zstd_ensure_outbuffer_space(output, out_buf_min_size);
+		if (ret) {
+			ERR(file->ctx, "zstd: %s\n", strerror(-ret));
+			break;
+		}
+
+		dsret = ZSTD_decompressStream(dstr, output, input);
+		if (ZSTD_isError(dsret)) {
+			ret = -EINVAL;
+			ERR(file->ctx, "zstd: %s\n", ZSTD_getErrorName(dsret));
+			break;
+		}
+		if (dsret > 0)
+			*next_block_size = (size_t)dsret;
+	} while (input->pos < input->size
+		 || output->pos > output->size
+		 || output->size - output->pos < out_buf_min_size);
+
+	return ret;
+}
+
+static int load_zstd(struct kmod_file *file)
+{
+	ZSTD_DStream *dstr;
+	size_t next_block_size;
+	size_t zst_inb_capacity = 0;
+	ZSTD_inBuffer zst_inb = { 0 };
+	ZSTD_outBuffer zst_outb = { 0 };
+	int ret;
+
+	dstr = ZSTD_createDStream();
+	if (dstr == NULL) {
+		ret = -EINVAL;
+		ERR(file->ctx, "zstd: Failed to create decompression stream\n");
+		goto out;
+	}
+
+	next_block_size = ZSTD_initDStream(dstr);
+
+	while (true) {
+		ret = zstd_read_block(file, next_block_size, &zst_inb,
+				      &zst_inb_capacity);
+		if (ret != 0)
+			goto out;
+		if (zst_inb.size == 0) /* EOF */
+			break;
+
+		ret = zstd_decompress_block(file, dstr, &zst_inb, &zst_outb,
+					    &next_block_size);
+		if (ret != 0)
+			goto out;
+	}
+
+	ZSTD_freeDStream(dstr);
+	free((void *)zst_inb.src);
+	file->zstd_used = true;
+	file->memory = zst_outb.dst;
+	file->size = zst_outb.pos;
+	return 0;
+out:
+	if (dstr != NULL)
+		ZSTD_freeDStream(dstr);
+	free((void *)zst_inb.src);
+	free((void *)zst_outb.dst);
+	return ret;
+}
+
+static void unload_zstd(struct kmod_file *file)
+{
+	if (!file->zstd_used)
+		return;
+	free(file->memory);
+}
+
+static const char magic_zstd[] = {0x28, 0xB5, 0x2F, 0xFD};
+#endif
+
+#ifdef ENABLE_XZ
+static void xz_uncompress_belch(struct kmod_file *file, lzma_ret ret)
+{
+	switch (ret) {
+	case LZMA_MEM_ERROR:
+		ERR(file->ctx, "xz: %s\n", strerror(ENOMEM));
+		break;
+	case LZMA_FORMAT_ERROR:
+		ERR(file->ctx, "xz: File format not recognized\n");
+		break;
+	case LZMA_OPTIONS_ERROR:
+		ERR(file->ctx, "xz: Unsupported compression options\n");
+		break;
+	case LZMA_DATA_ERROR:
+		ERR(file->ctx, "xz: File is corrupt\n");
+		break;
+	case LZMA_BUF_ERROR:
+		ERR(file->ctx, "xz: Unexpected end of input\n");
+		break;
+	default:
+		ERR(file->ctx, "xz: Internal error (bug)\n");
+		break;
+	}
+}
+
+static int xz_uncompress(lzma_stream *strm, struct kmod_file *file)
+{
+	uint8_t in_buf[BUFSIZ], out_buf[BUFSIZ];
+	lzma_action action = LZMA_RUN;
+	lzma_ret ret;
+	void *p = NULL;
+	size_t total = 0;
+
+	strm->avail_in  = 0;
+	strm->next_out  = out_buf;
+	strm->avail_out = sizeof(out_buf);
+
+	while (true) {
+		if (strm->avail_in == 0) {
+			ssize_t rdret = read(file->fd, in_buf, sizeof(in_buf));
+			if (rdret < 0) {
+				ret = -errno;
+				goto out;
+			}
+			strm->next_in  = in_buf;
+			strm->avail_in = rdret;
+			if (rdret == 0)
+				action = LZMA_FINISH;
+		}
+		ret = lzma_code(strm, action);
+		if (strm->avail_out == 0 || ret != LZMA_OK) {
+			size_t write_size = BUFSIZ - strm->avail_out;
+			char *tmp = realloc(p, total + write_size);
+			if (tmp == NULL) {
+				ret = -errno;
+				goto out;
+			}
+			memcpy(tmp + total, out_buf, write_size);
+			total += write_size;
+			p = tmp;
+			strm->next_out = out_buf;
+			strm->avail_out = BUFSIZ;
+		}
+		if (ret == LZMA_STREAM_END)
+			break;
+		if (ret != LZMA_OK) {
+			xz_uncompress_belch(file, ret);
+			ret = -EINVAL;
+			goto out;
+		}
+	}
+	file->xz_used = true;
+	file->memory = p;
+	file->size = total;
+	return 0;
+ out:
+	free(p);
+	return ret;
+}
+
+static int load_xz(struct kmod_file *file)
+{
+	lzma_stream strm = LZMA_STREAM_INIT;
+	lzma_ret lzret;
+	int ret;
+
+	lzret = lzma_stream_decoder(&strm, UINT64_MAX, LZMA_CONCATENATED);
+	if (lzret == LZMA_MEM_ERROR) {
+		ERR(file->ctx, "xz: %s\n", strerror(ENOMEM));
+		return -ENOMEM;
+	} else if (lzret != LZMA_OK) {
+		ERR(file->ctx, "xz: Internal error (bug)\n");
+		return -EINVAL;
+	}
+	ret = xz_uncompress(&strm, file);
+	lzma_end(&strm);
+	return ret;
+}
+
+static void unload_xz(struct kmod_file *file)
+{
+	if (!file->xz_used)
+		return;
+	free(file->memory);
+}
+
+static const char magic_xz[] = {0xfd, '7', 'z', 'X', 'Z', 0};
+#endif
+
+#ifdef ENABLE_ZLIB
+#define READ_STEP (4 * 1024 * 1024)
+static int load_zlib(struct kmod_file *file)
+{
+	int err = 0;
+	off_t did = 0, total = 0;
+	_cleanup_free_ unsigned char *p = NULL;
+
+	errno = 0;
+	file->gzf = gzdopen(file->fd, "rb");
+	if (file->gzf == NULL)
+		return -errno;
+	file->fd = -1; /* now owned by gzf due gzdopen() */
+
+	for (;;) {
+		int r;
+
+		if (did == total) {
+			void *tmp = realloc(p, total + READ_STEP);
+			if (tmp == NULL) {
+				err = -errno;
+				goto error;
+			}
+			total += READ_STEP;
+			p = tmp;
+		}
+
+		r = gzread(file->gzf, p + did, total - did);
+		if (r == 0)
+			break;
+		else if (r < 0) {
+			int gzerr;
+			const char *gz_errmsg = gzerror(file->gzf, &gzerr);
+
+			ERR(file->ctx, "gzip: %s\n", gz_errmsg);
+
+			/* gzip might not set errno here */
+			err = gzerr == Z_ERRNO ? -errno : -EINVAL;
+			goto error;
+		}
+		did += r;
+	}
+
+	file->memory = p;
+	file->size = did;
+	p = NULL;
+	return 0;
+
+error:
+	gzclose(file->gzf);
+	return err;
+}
+
+static void unload_zlib(struct kmod_file *file)
+{
+	if (file->gzf == NULL)
+		return;
+	free(file->memory);
+	gzclose(file->gzf); /* closes file->fd */
+}
+
+static const char magic_zlib[] = {0x1f, 0x8b};
+#endif
+
+static const struct comp_type {
+	size_t magic_size;
+	enum kmod_file_compression_type compression;
+	const char *magic_bytes;
+	const struct file_ops ops;
+} comp_types[] = {
+#ifdef ENABLE_ZSTD
+	{sizeof(magic_zstd),	KMOD_FILE_COMPRESSION_ZSTD, magic_zstd, {load_zstd, unload_zstd}},
+#endif
+#ifdef ENABLE_XZ
+	{sizeof(magic_xz),	KMOD_FILE_COMPRESSION_XZ, magic_xz, {load_xz, unload_xz}},
+#endif
+#ifdef ENABLE_ZLIB
+	{sizeof(magic_zlib),	KMOD_FILE_COMPRESSION_ZLIB, magic_zlib, {load_zlib, unload_zlib}},
+#endif
+	{0,			KMOD_FILE_COMPRESSION_NONE, NULL, {NULL, NULL}}
+};
+
+static int load_reg(struct kmod_file *file)
+{
+	struct stat st;
+
+	if (fstat(file->fd, &st) < 0)
+		return -errno;
+
+	file->size = st.st_size;
+	file->memory = mmap(NULL, file->size, PROT_READ, MAP_PRIVATE,
+			    file->fd, 0);
+	if (file->memory == MAP_FAILED)
+		return -errno;
+
+	return 0;
+}
+
+static void unload_reg(struct kmod_file *file)
+{
+	munmap(file->memory, file->size);
+}
+
+static const struct file_ops reg_ops = {
+	load_reg, unload_reg
+};
+
+struct kmod_elf *kmod_file_get_elf(struct kmod_file *file)
+{
+	if (file->elf)
+		return file->elf;
+
+	kmod_file_load_contents(file);
+	file->elf = kmod_elf_new(file->memory, file->size);
+	return file->elf;
+}
+
+struct kmod_file *kmod_file_open(const struct kmod_ctx *ctx,
+						const char *filename)
+{
+	struct kmod_file *file = calloc(1, sizeof(struct kmod_file));
+	const struct comp_type *itr;
+	size_t magic_size_max = 0;
+	int err = 0;
+
+	if (file == NULL)
+		return NULL;
+
+	file->fd = open(filename, O_RDONLY|O_CLOEXEC);
+	if (file->fd < 0) {
+		err = -errno;
+		goto error;
+	}
+
+	for (itr = comp_types; itr->ops.load != NULL; itr++) {
+		if (magic_size_max < itr->magic_size)
+			magic_size_max = itr->magic_size;
+	}
+
+	if (magic_size_max > 0) {
+		char *buf = alloca(magic_size_max + 1);
+		ssize_t sz;
+
+		if (buf == NULL) {
+			err = -errno;
+			goto error;
+		}
+		sz = read_str_safe(file->fd, buf, magic_size_max + 1);
+		lseek(file->fd, 0, SEEK_SET);
+		if (sz != (ssize_t)magic_size_max) {
+			if (sz < 0)
+				err = sz;
+			else
+				err = -EINVAL;
+			goto error;
+		}
+
+		for (itr = comp_types; itr->ops.load != NULL; itr++) {
+			if (memcmp(buf, itr->magic_bytes, itr->magic_size) == 0) {
+				file->ops = &itr->ops;
+				file->compression = itr->compression;
+				break;
+			}
+		}
+	}
+
+	if (file->ops == NULL) {
+		file->ops = &reg_ops;
+		file->compression = KMOD_FILE_COMPRESSION_NONE;
+	}
+
+	file->ctx = ctx;
+
+error:
+	if (err < 0) {
+		if (file->fd >= 0)
+			close(file->fd);
+		free(file);
+		errno = -err;
+		return NULL;
+	}
+
+	return file;
+}
+
+/*
+ *  Callers should just check file->memory got updated
+ */
+void kmod_file_load_contents(struct kmod_file *file)
+{
+	if (file->memory)
+		return;
+
+	/*  The load functions already log possible errors. */
+	file->ops->load(file);
+}
+
+void *kmod_file_get_contents(const struct kmod_file *file)
+{
+	return file->memory;
+}
+
+off_t kmod_file_get_size(const struct kmod_file *file)
+{
+	return file->size;
+}
+
+enum kmod_file_compression_type kmod_file_get_compression(const struct kmod_file *file)
+{
+	return file->compression;
+}
+
+int kmod_file_get_fd(const struct kmod_file *file)
+{
+	return file->fd;
+}
+
+void kmod_file_unref(struct kmod_file *file)
+{
+	if (file->elf)
+		kmod_elf_unref(file->elf);
+
+	if (file->memory)
+		file->ops->unload(file);
+
+	if (file->fd >= 0)
+		close(file->fd);
+	free(file);
+}
diff --git a/libkmod/libkmod-index.c b/libkmod/libkmod-index.c
new file mode 100644
index 0000000..6a34c8d
--- /dev/null
+++ b/libkmod/libkmod-index.c
@@ -0,0 +1,1082 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <arpa/inet.h>
+#include <assert.h>
+#include <errno.h>
+#include <fnmatch.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <shared/macro.h>
+#include <shared/strbuf.h>
+#include <shared/util.h>
+
+#include "libkmod-internal.h"
+#include "libkmod-index.h"
+
+/* libkmod-index.c: module index file implementation
+ *
+ * Integers are stored as 32 bit unsigned in "network" order, i.e. MSB first.
+ * All files start with a magic number.
+ *
+ * Magic spells "BOOTFAST". Second one used on newer versioned binary files.
+ * #define INDEX_MAGIC_OLD 0xB007FA57
+ *
+ * We use a version string to keep track of changes to the binary format
+ * This is stored in the form: INDEX_MAJOR (hi) INDEX_MINOR (lo) just in
+ * case we ever decide to have minor changes that are not incompatible.
+ */
+#define INDEX_MAGIC 0xB007F457
+#define INDEX_VERSION_MAJOR 0x0002
+#define INDEX_VERSION_MINOR 0x0001
+#define INDEX_VERSION ((INDEX_VERSION_MAJOR<<16)|INDEX_VERSION_MINOR)
+
+/* The index file maps keys to values. Both keys and values are ASCII strings.
+ * Each key can have multiple values. Values are sorted by an integer priority.
+ *
+ * The reader also implements a wildcard search (including range expressions)
+ * where the keys in the index are treated as patterns.
+ * This feature is required for module aliases.
+ */
+#define INDEX_CHILDMAX 128
+
+/* Disk format:
+ *
+ *  uint32_t magic = INDEX_MAGIC;
+ *  uint32_t version = INDEX_VERSION;
+ *  uint32_t root_offset;
+ *
+ *  (node_offset & INDEX_NODE_MASK) specifies the file offset of nodes:
+ *
+ *       char[] prefix; // nul terminated
+ *
+ *       char first;
+ *       char last;
+ *       uint32_t children[last - first + 1];
+ *
+ *       uint32_t value_count;
+ *       struct {
+ *           uint32_t priority;
+ *           char[] value; // nul terminated
+ *       } values[value_count];
+ *
+ *  (node_offset & INDEX_NODE_FLAGS) indicates which fields are present.
+ *  Empty prefixes are omitted, leaf nodes omit the three child-related fields.
+ *
+ *  This could be optimised further by adding a sparse child format
+ *  (indicated using a new flag).
+ *
+ *
+ * Implementation is based on a radix tree, or "trie".
+ * Each arc from parent to child is labelled with a character.
+ * Each path from the root represents a string.
+ *
+ * == Example strings ==
+ *
+ * ask
+ * ate
+ * on
+ * once
+ * one
+ *
+ * == Key ==
+ *  + Normal node
+ *  * Marked node, representing a key and it's values.
+ *
+ * +
+ * |-a-+-s-+-k-*
+ * |   |
+ * |   `-t-+-e-*
+ * |
+ * `-o-+-n-*-c-+-e-*
+ *         |
+ *         `-e-*
+ *
+ * Naive implementations tend to be very space inefficient; child pointers
+ * are stored in arrays indexed by character, but most child pointers are null.
+ *
+ * Our implementation uses a scheme described by Wikipedia as a Patrica trie,
+ *
+ *     "easiest to understand as a space-optimized trie where
+ *      each node with only one child is merged with its child"
+ *
+ * +
+ * |-a-+-sk-*
+ * |   |
+ * |   `-te-*
+ * |
+ * `-on-*-ce-*
+ *      |
+ *      `-e-*
+ *
+ * We still use arrays of child pointers indexed by a single character;
+ * the remaining characters of the label are stored as a "prefix" in the child.
+ *
+ * The paper describing the original Patrica trie works on individiual bits -
+ * each node has a maximum of two children, which increases space efficiency.
+ * However for this application it is simpler to use the ASCII character set.
+ * Since the index file is read-only, it can be compressed by omitting null
+ * child pointers at the start and end of arrays.
+ */
+
+/* Format of node offsets within index file */
+enum node_offset {
+	INDEX_NODE_FLAGS    = 0xF0000000, /* Flags in high nibble */
+	INDEX_NODE_PREFIX   = 0x80000000,
+	INDEX_NODE_VALUES = 0x40000000,
+	INDEX_NODE_CHILDS   = 0x20000000,
+
+	INDEX_NODE_MASK     = 0x0FFFFFFF, /* Offset value */
+};
+
+void index_values_free(struct index_value *values)
+{
+	while (values) {
+		struct index_value *value = values;
+
+		values = value->next;
+		free(value);
+	}
+}
+
+static int add_value(struct index_value **values,
+		     const char *value, unsigned len, unsigned int priority)
+{
+	struct index_value *v;
+
+	/* find position to insert value */
+	while (*values && (*values)->priority < priority)
+		values = &(*values)->next;
+
+	v = malloc(sizeof(struct index_value) + len + 1);
+	if (!v)
+		return -1;
+	v->next = *values;
+	v->priority = priority;
+	v->len = len;
+	memcpy(v->value, value, len);
+	v->value[len] = '\0';
+	*values = v;
+
+	return 0;
+}
+
+static void read_error(void)
+{
+	fatal("Module index: unexpected error: %s\n"
+			"Try re-running depmod\n", errno ? strerror(errno) : "EOF");
+}
+
+static int read_char(FILE *in)
+{
+	int ch;
+
+	errno = 0;
+	ch = getc_unlocked(in);
+	if (ch == EOF)
+		read_error();
+	return ch;
+}
+
+static uint32_t read_long(FILE *in)
+{
+	uint32_t l;
+
+	errno = 0;
+	if (fread(&l, sizeof(uint32_t), 1, in) != sizeof(uint32_t))
+		read_error();
+	return ntohl(l);
+}
+
+static unsigned buf_freadchars(struct strbuf *buf, FILE *in)
+{
+	unsigned i = 0;
+	int ch;
+
+	while ((ch = read_char(in))) {
+		if (!strbuf_pushchar(buf, ch))
+			break;
+		i++;
+	}
+
+	return i;
+}
+
+/*
+ * Index file searching
+ */
+struct index_node_f {
+	FILE *file;
+	char *prefix;		/* path compression */
+	struct index_value *values;
+	unsigned char first;	/* range of child nodes */
+	unsigned char last;
+	uint32_t children[0];
+};
+
+static struct index_node_f *index_read(FILE *in, uint32_t offset)
+{
+	struct index_node_f *node;
+	char *prefix;
+	int i, child_count = 0;
+
+	if ((offset & INDEX_NODE_MASK) == 0)
+		return NULL;
+
+	if (fseek(in, offset & INDEX_NODE_MASK, SEEK_SET) < 0)
+		return NULL;
+
+	if (offset & INDEX_NODE_PREFIX) {
+		struct strbuf buf;
+		strbuf_init(&buf);
+		buf_freadchars(&buf, in);
+		prefix = strbuf_steal(&buf);
+	} else
+		prefix = NOFAIL(strdup(""));
+
+	if (offset & INDEX_NODE_CHILDS) {
+		char first = read_char(in);
+		char last = read_char(in);
+		child_count = last - first + 1;
+
+		node = NOFAIL(malloc(sizeof(struct index_node_f) +
+				     sizeof(uint32_t) * child_count));
+
+		node->first = first;
+		node->last = last;
+
+		for (i = 0; i < child_count; i++)
+			node->children[i] = read_long(in);
+	} else {
+		node = NOFAIL(malloc(sizeof(struct index_node_f)));
+		node->first = INDEX_CHILDMAX;
+		node->last = 0;
+	}
+
+	node->values = NULL;
+	if (offset & INDEX_NODE_VALUES) {
+		int value_count;
+		struct strbuf buf;
+		const char *value;
+		unsigned int priority;
+
+		value_count = read_long(in);
+
+		strbuf_init(&buf);
+		while (value_count--) {
+			priority = read_long(in);
+			buf_freadchars(&buf, in);
+			value = strbuf_str(&buf);
+			add_value(&node->values, value, buf.used, priority);
+			strbuf_clear(&buf);
+		}
+		strbuf_release(&buf);
+	}
+
+	node->prefix = prefix;
+	node->file = in;
+	return node;
+}
+
+static void index_close(struct index_node_f *node)
+{
+	free(node->prefix);
+	index_values_free(node->values);
+	free(node);
+}
+
+struct index_file {
+	FILE *file;
+	uint32_t root_offset;
+};
+
+struct index_file *index_file_open(const char *filename)
+{
+	FILE *file;
+	uint32_t magic, version;
+	struct index_file *new;
+
+	file = fopen(filename, "re");
+	if (!file)
+		return NULL;
+	errno = EINVAL;
+
+	magic = read_long(file);
+	if (magic != INDEX_MAGIC) {
+		fclose(file);
+		return NULL;
+	}
+
+	version = read_long(file);
+	if (version >> 16 != INDEX_VERSION_MAJOR) {
+		fclose(file);
+		return NULL;
+	}
+
+	new = NOFAIL(malloc(sizeof(struct index_file)));
+	new->file = file;
+	new->root_offset = read_long(new->file);
+
+	errno = 0;
+	return new;
+}
+
+void index_file_close(struct index_file *idx)
+{
+	fclose(idx->file);
+	free(idx);
+}
+
+static struct index_node_f *index_readroot(struct index_file *in)
+{
+	return index_read(in->file, in->root_offset);
+}
+
+static struct index_node_f *index_readchild(const struct index_node_f *parent,
+					    int ch)
+{
+	if (parent->first <= ch && ch <= parent->last) {
+		return index_read(parent->file,
+		                       parent->children[ch - parent->first]);
+	}
+
+	return NULL;
+}
+
+static void index_dump_node(struct index_node_f *node, struct strbuf *buf,
+								int fd)
+{
+	struct index_value *v;
+	int ch, pushed;
+
+	pushed = strbuf_pushchars(buf, node->prefix);
+
+	for (v = node->values; v != NULL; v = v->next) {
+		write_str_safe(fd, buf->bytes, buf->used);
+		write_str_safe(fd, " ", 1);
+		write_str_safe(fd, v->value, strlen(v->value));
+		write_str_safe(fd, "\n", 1);
+	}
+
+	for (ch = node->first; ch <= node->last; ch++) {
+		struct index_node_f *child = index_readchild(node, ch);
+
+		if (!child)
+			continue;
+
+		strbuf_pushchar(buf, ch);
+		index_dump_node(child, buf, fd);
+		strbuf_popchar(buf);
+	}
+
+	strbuf_popchars(buf, pushed);
+	index_close(node);
+}
+
+void index_dump(struct index_file *in, int fd, const char *prefix)
+{
+	struct index_node_f *root;
+	struct strbuf buf;
+
+	root = index_readroot(in);
+	if (root == NULL)
+		return;
+
+	strbuf_init(&buf);
+	strbuf_pushchars(&buf, prefix);
+	index_dump_node(root, &buf, fd);
+	strbuf_release(&buf);
+}
+
+static char *index_search__node(struct index_node_f *node, const char *key, int i)
+{
+	char *value;
+	struct index_node_f *child;
+	int ch;
+	int j;
+
+	while(node) {
+		for (j = 0; node->prefix[j]; j++) {
+			ch = node->prefix[j];
+
+			if (ch != key[i+j]) {
+				index_close(node);
+				return NULL;
+			}
+		}
+
+		i += j;
+
+		if (key[i] == '\0') {
+			value = node->values != NULL
+				? strdup(node->values[0].value)
+				: NULL;
+
+			index_close(node);
+			return value;
+		}
+
+		child = index_readchild(node, key[i]);
+		index_close(node);
+		node = child;
+		i++;
+	}
+
+	return NULL;
+}
+
+/*
+ * Search the index for a key
+ *
+ * Returns the value of the first match
+ *
+ * The recursive functions free their node argument (using index_close).
+ */
+char *index_search(struct index_file *in, const char *key)
+{
+// FIXME: return value by reference instead of strdup
+	struct index_node_f *root;
+	char *value;
+
+	root = index_readroot(in);
+	value = index_search__node(root, key, 0);
+
+	return value;
+}
+
+
+
+/* Level 4: add all the values from a matching node */
+static void index_searchwild__allvalues(struct index_node_f *node,
+					struct index_value **out)
+{
+	struct index_value *v;
+
+	for (v = node->values; v != NULL; v = v->next)
+		add_value(out, v->value, v->len, v->priority);
+
+	index_close(node);
+}
+
+/*
+ * Level 3: traverse a sub-keyspace which starts with a wildcard,
+ * looking for matches.
+ */
+static void index_searchwild__all(struct index_node_f *node, int j,
+				  struct strbuf *buf,
+				  const char *subkey,
+				  struct index_value **out)
+{
+	int pushed = 0;
+	int ch;
+
+	while (node->prefix[j]) {
+		ch = node->prefix[j];
+
+		strbuf_pushchar(buf, ch);
+		pushed++;
+		j++;
+	}
+
+	for (ch = node->first; ch <= node->last; ch++) {
+		struct index_node_f *child = index_readchild(node, ch);
+
+		if (!child)
+			continue;
+
+		strbuf_pushchar(buf, ch);
+		index_searchwild__all(child, 0, buf, subkey, out);
+		strbuf_popchar(buf);
+	}
+
+	if (node->values) {
+		if (fnmatch(strbuf_str(buf), subkey, 0) == 0)
+			index_searchwild__allvalues(node, out);
+		else
+			index_close(node);
+	} else {
+		index_close(node);
+	}
+
+	strbuf_popchars(buf, pushed);
+}
+
+/* Level 2: descend the tree (until we hit a wildcard) */
+static void index_searchwild__node(struct index_node_f *node,
+				   struct strbuf *buf,
+				   const char *key, int i,
+				   struct index_value **out)
+{
+	struct index_node_f *child;
+	int j;
+	int ch;
+
+	while(node) {
+		for (j = 0; node->prefix[j]; j++) {
+			ch = node->prefix[j];
+
+			if (ch == '*' || ch == '?' || ch == '[') {
+				index_searchwild__all(node, j, buf,
+						      &key[i+j], out);
+				return;
+			}
+
+			if (ch != key[i+j]) {
+				index_close(node);
+				return;
+			}
+		}
+
+		i += j;
+
+		child = index_readchild(node, '*');
+		if (child) {
+			strbuf_pushchar(buf, '*');
+			index_searchwild__all(child, 0, buf, &key[i], out);
+			strbuf_popchar(buf);
+		}
+
+		child = index_readchild(node, '?');
+		if (child) {
+			strbuf_pushchar(buf, '?');
+			index_searchwild__all(child, 0, buf, &key[i], out);
+			strbuf_popchar(buf);
+		}
+
+		child = index_readchild(node, '[');
+		if (child) {
+			strbuf_pushchar(buf, '[');
+			index_searchwild__all(child, 0, buf, &key[i], out);
+			strbuf_popchar(buf);
+		}
+
+		if (key[i] == '\0') {
+			index_searchwild__allvalues(node, out);
+
+			return;
+		}
+
+		child = index_readchild(node, key[i]);
+		index_close(node);
+		node = child;
+		i++;
+	}
+}
+
+/*
+ * Search the index for a key.  The index may contain wildcards.
+ *
+ * Returns a list of all the values of matching keys.
+ */
+struct index_value *index_searchwild(struct index_file *in, const char *key)
+{
+	struct index_node_f *root = index_readroot(in);
+	struct strbuf buf;
+	struct index_value *out = NULL;
+
+	strbuf_init(&buf);
+	index_searchwild__node(root, &buf, key, 0, &out);
+	strbuf_release(&buf);
+	return out;
+}
+
+/**************************************************************************/
+/*
+ * Alternative implementation, using mmap to map all the file to memory when
+ * starting
+ */
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+static const char _idx_empty_str[] = "";
+
+struct index_mm {
+	const struct kmod_ctx *ctx;
+	void *mm;
+	uint32_t root_offset;
+	size_t size;
+};
+
+struct index_mm_value {
+	unsigned int priority;
+	unsigned int len;
+	const char *value;
+};
+
+struct index_mm_value_array {
+	struct index_mm_value *values;
+	unsigned int len;
+};
+
+struct index_mm_node {
+	struct index_mm *idx;
+	const char *prefix; /* mmape'd value */
+	struct index_mm_value_array values;
+	unsigned char first;
+	unsigned char last;
+	uint32_t children[];
+};
+
+static inline uint32_t read_long_mm(void **p)
+{
+	uint8_t *addr = *(uint8_t **)p;
+	uint32_t v;
+
+	/* addr may be unalined to uint32_t */
+	v = get_unaligned((uint32_t *) addr);
+
+	*p = addr + sizeof(uint32_t);
+	return ntohl(v);
+}
+
+static inline uint8_t read_char_mm(void **p)
+{
+	uint8_t *addr = *(uint8_t **)p;
+	uint8_t v = *addr;
+	*p = addr + sizeof(uint8_t);
+	return v;
+}
+
+static inline char *read_chars_mm(void **p, unsigned *rlen)
+{
+	char *addr = *(char **)p;
+	size_t len = *rlen = strlen(addr);
+	*p = addr + len + 1;
+	return addr;
+}
+
+static struct index_mm_node *index_mm_read_node(struct index_mm *idx,
+							uint32_t offset) {
+	void *p = idx->mm;
+	struct index_mm_node *node;
+	const char *prefix;
+	int i, child_count, value_count, children_padding;
+	uint32_t children[INDEX_CHILDMAX];
+	char first, last;
+
+	if ((offset & INDEX_NODE_MASK) == 0)
+		return NULL;
+
+	p = (char *)p + (offset & INDEX_NODE_MASK);
+
+	if (offset & INDEX_NODE_PREFIX) {
+		unsigned len;
+		prefix = read_chars_mm(&p, &len);
+	} else
+		prefix = _idx_empty_str;
+
+	if (offset & INDEX_NODE_CHILDS) {
+		first = read_char_mm(&p);
+		last = read_char_mm(&p);
+		child_count = last - first + 1;
+		for (i = 0; i < child_count; i++)
+			children[i] = read_long_mm(&p);
+	} else {
+		first = INDEX_CHILDMAX;
+		last = 0;
+		child_count = 0;
+	}
+
+	children_padding = (sizeof(struct index_mm_node) +
+			    (sizeof(uint32_t) * child_count)) % sizeof(void *);
+
+	if (offset & INDEX_NODE_VALUES)
+		value_count = read_long_mm(&p);
+	else
+		value_count = 0;
+
+	node = malloc(sizeof(struct index_mm_node)
+		      + sizeof(uint32_t) * child_count + children_padding
+		      + sizeof(struct index_mm_value) * value_count);
+	if (node == NULL)
+		return NULL;
+
+	node->idx = idx;
+	node->prefix = prefix;
+	if (value_count == 0)
+		node->values.values = NULL;
+	else {
+		node->values.values = (struct index_mm_value *)
+			((char *)node + sizeof(struct index_mm_node) +
+			 sizeof(uint32_t) * child_count + children_padding);
+	}
+	node->values.len = value_count;
+	node->first = first;
+	node->last = last;
+	memcpy(node->children, children, sizeof(uint32_t) * child_count);
+
+	for (i = 0; i < value_count; i++) {
+		struct index_mm_value *v = node->values.values + i;
+		v->priority = read_long_mm(&p);
+		v->value = read_chars_mm(&p, &v->len);
+	}
+
+	return node;
+}
+
+static void index_mm_free_node(struct index_mm_node *node)
+{
+	free(node);
+}
+
+int index_mm_open(const struct kmod_ctx *ctx, const char *filename,
+		  unsigned long long *stamp, struct index_mm **pidx)
+{
+	int fd, err;
+	struct stat st;
+	struct index_mm *idx;
+	struct {
+		uint32_t magic;
+		uint32_t version;
+		uint32_t root_offset;
+	} hdr;
+	void *p;
+
+	assert(pidx != NULL);
+
+	DBG(ctx, "file=%s\n", filename);
+
+	idx = malloc(sizeof(*idx));
+	if (idx == NULL) {
+		ERR(ctx, "malloc: %m\n");
+		return -ENOMEM;
+	}
+
+	if ((fd = open(filename, O_RDONLY|O_CLOEXEC)) < 0) {
+		DBG(ctx, "open(%s, O_RDONLY|O_CLOEXEC): %m\n", filename);
+		err = -errno;
+		goto fail_open;
+	}
+
+	if (fstat(fd, &st) < 0 || (size_t) st.st_size < sizeof(hdr)) {
+		err = -EINVAL;
+		goto fail_nommap;
+	}
+
+	idx->mm = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+	if (idx->mm == MAP_FAILED) {
+		ERR(ctx, "mmap(NULL, %"PRIu64", PROT_READ, %d, MAP_PRIVATE, 0): %m\n",
+							st.st_size, fd);
+		err = -errno;
+		goto fail_nommap;
+	}
+
+	p = idx->mm;
+	hdr.magic = read_long_mm(&p);
+	hdr.version = read_long_mm(&p);
+	hdr.root_offset = read_long_mm(&p);
+
+	if (hdr.magic != INDEX_MAGIC) {
+		ERR(ctx, "magic check fail: %x instead of %x\n", hdr.magic,
+								INDEX_MAGIC);
+		err = -EINVAL;
+		goto fail;
+	}
+
+	if (hdr.version >> 16 != INDEX_VERSION_MAJOR) {
+		ERR(ctx, "major version check fail: %u instead of %u\n",
+					hdr.version >> 16, INDEX_VERSION_MAJOR);
+		err = -EINVAL;
+		goto fail;
+	}
+
+	idx->root_offset = hdr.root_offset;
+	idx->size = st.st_size;
+	idx->ctx = ctx;
+	close(fd);
+
+	*stamp = stat_mstamp(&st);
+	*pidx = idx;
+
+	return 0;
+
+fail:
+	munmap(idx->mm, st.st_size);
+fail_nommap:
+	close(fd);
+fail_open:
+	free(idx);
+	return err;
+}
+
+void index_mm_close(struct index_mm *idx)
+{
+	munmap(idx->mm, idx->size);
+	free(idx);
+}
+
+static struct index_mm_node *index_mm_readroot(struct index_mm *idx)
+{
+	return index_mm_read_node(idx, idx->root_offset);
+}
+
+static struct index_mm_node *index_mm_readchild(const struct index_mm_node *parent,
+									int ch)
+{
+	if (parent->first <= ch && ch <= parent->last) {
+		return index_mm_read_node(parent->idx,
+					parent->children[ch - parent->first]);
+	}
+
+	return NULL;
+}
+
+static void index_mm_dump_node(struct index_mm_node *node, struct strbuf *buf,
+								int fd)
+{
+	struct index_mm_value *itr, *itr_end;
+	int ch, pushed;
+
+	pushed = strbuf_pushchars(buf, node->prefix);
+
+	itr = node->values.values;
+	itr_end = itr + node->values.len;
+	for (; itr < itr_end; itr++) {
+		write_str_safe(fd, buf->bytes, buf->used);
+		write_str_safe(fd, " ", 1);
+		write_str_safe(fd, itr->value, itr->len);
+		write_str_safe(fd, "\n", 1);
+	}
+
+	for (ch = node->first; ch <= node->last; ch++) {
+		struct index_mm_node *child = index_mm_readchild(node, ch);
+
+		if (child == NULL)
+			continue;
+
+		strbuf_pushchar(buf, ch);
+		index_mm_dump_node(child, buf, fd);
+		strbuf_popchar(buf);
+	}
+
+	strbuf_popchars(buf, pushed);
+	index_mm_free_node(node);
+}
+
+void index_mm_dump(struct index_mm *idx, int fd, const char *prefix)
+{
+	struct index_mm_node *root;
+	struct strbuf buf;
+
+	root = index_mm_readroot(idx);
+	if (root == NULL)
+		return;
+
+	strbuf_init(&buf);
+	strbuf_pushchars(&buf, prefix);
+	index_mm_dump_node(root, &buf, fd);
+	strbuf_release(&buf);
+}
+
+static char *index_mm_search_node(struct index_mm_node *node, const char *key,
+									int i)
+{
+	char *value;
+	struct index_mm_node *child;
+	int ch;
+	int j;
+
+	while(node) {
+		for (j = 0; node->prefix[j]; j++) {
+			ch = node->prefix[j];
+
+			if (ch != key[i+j]) {
+				index_mm_free_node(node);
+				return NULL;
+			}
+		}
+
+		i += j;
+
+		if (key[i] == '\0') {
+			value = node->values.len > 0
+				? strdup(node->values.values[0].value)
+				: NULL;
+
+			index_mm_free_node(node);
+			return value;
+		}
+
+		child = index_mm_readchild(node, key[i]);
+		index_mm_free_node(node);
+		node = child;
+		i++;
+	}
+
+	return NULL;
+}
+
+/*
+ * Search the index for a key
+ *
+ * Returns the value of the first match
+ *
+ * The recursive functions free their node argument (using index_close).
+ */
+char *index_mm_search(struct index_mm *idx, const char *key)
+{
+// FIXME: return value by reference instead of strdup
+	struct index_mm_node *root;
+	char *value;
+
+	root = index_mm_readroot(idx);
+	value = index_mm_search_node(root, key, 0);
+
+	return value;
+}
+
+/* Level 4: add all the values from a matching node */
+static void index_mm_searchwild_allvalues(struct index_mm_node *node,
+						struct index_value **out)
+{
+	struct index_mm_value *itr, *itr_end;
+
+	itr = node->values.values;
+	itr_end = itr + node->values.len;
+	for (; itr < itr_end; itr++)
+		add_value(out, itr->value, itr->len, itr->priority);
+
+	index_mm_free_node(node);
+}
+
+/*
+ * Level 3: traverse a sub-keyspace which starts with a wildcard,
+ * looking for matches.
+ */
+static void index_mm_searchwild_all(struct index_mm_node *node, int j,
+					  struct strbuf *buf,
+					  const char *subkey,
+					  struct index_value **out)
+{
+	int pushed = 0;
+	int ch;
+
+	while (node->prefix[j]) {
+		ch = node->prefix[j];
+
+		strbuf_pushchar(buf, ch);
+		pushed++;
+		j++;
+	}
+
+	for (ch = node->first; ch <= node->last; ch++) {
+		struct index_mm_node *child = index_mm_readchild(node, ch);
+
+		if (!child)
+			continue;
+
+		strbuf_pushchar(buf, ch);
+		index_mm_searchwild_all(child, 0, buf, subkey, out);
+		strbuf_popchar(buf);
+	}
+
+	if (node->values.len > 0) {
+		if (fnmatch(strbuf_str(buf), subkey, 0) == 0)
+			index_mm_searchwild_allvalues(node, out);
+		else
+			index_mm_free_node(node);
+	} else {
+		index_mm_free_node(node);
+	}
+
+	strbuf_popchars(buf, pushed);
+}
+
+/* Level 2: descend the tree (until we hit a wildcard) */
+static void index_mm_searchwild_node(struct index_mm_node *node,
+					   struct strbuf *buf,
+					   const char *key, int i,
+					   struct index_value **out)
+{
+	struct index_mm_node *child;
+	int j;
+	int ch;
+
+	while(node) {
+		for (j = 0; node->prefix[j]; j++) {
+			ch = node->prefix[j];
+
+			if (ch == '*' || ch == '?' || ch == '[') {
+				index_mm_searchwild_all(node, j, buf,
+						      &key[i+j], out);
+				return;
+			}
+
+			if (ch != key[i+j]) {
+				index_mm_free_node(node);
+				return;
+			}
+		}
+
+		i += j;
+
+		child = index_mm_readchild(node, '*');
+		if (child) {
+			strbuf_pushchar(buf, '*');
+			index_mm_searchwild_all(child, 0, buf, &key[i], out);
+			strbuf_popchar(buf);
+		}
+
+		child = index_mm_readchild(node, '?');
+		if (child) {
+			strbuf_pushchar(buf, '?');
+			index_mm_searchwild_all(child, 0, buf, &key[i], out);
+			strbuf_popchar(buf);
+		}
+
+		child = index_mm_readchild(node, '[');
+		if (child) {
+			strbuf_pushchar(buf, '[');
+			index_mm_searchwild_all(child, 0, buf, &key[i], out);
+			strbuf_popchar(buf);
+		}
+
+		if (key[i] == '\0') {
+			index_mm_searchwild_allvalues(node, out);
+
+			return;
+		}
+
+		child = index_mm_readchild(node, key[i]);
+		index_mm_free_node(node);
+		node = child;
+		i++;
+	}
+}
+
+/*
+ * Search the index for a key.  The index may contain wildcards.
+ *
+ * Returns a list of all the values of matching keys.
+ */
+struct index_value *index_mm_searchwild(struct index_mm *idx, const char *key)
+{
+	struct index_mm_node *root = index_mm_readroot(idx);
+	struct strbuf buf;
+	struct index_value *out = NULL;
+
+	strbuf_init(&buf);
+	index_mm_searchwild_node(root, &buf, key, 0, &out);
+	strbuf_release(&buf);
+	return out;
+}
diff --git a/libkmod/libkmod-index.h b/libkmod/libkmod-index.h
new file mode 100644
index 0000000..db671b0
--- /dev/null
+++ b/libkmod/libkmod-index.h
@@ -0,0 +1,48 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <inttypes.h>
+
+struct index_value {
+	struct index_value *next;
+	unsigned int priority;
+	unsigned int len;
+	char value[0];
+};
+
+/* In-memory index (depmod only) */
+struct index_file;
+struct index_file *index_file_open(const char *filename);
+void index_file_close(struct index_file *idx);
+char *index_search(struct index_file *idx, const char *key);
+void index_dump(struct index_file *in, int fd, const char *prefix);
+struct index_value *index_searchwild(struct index_file *idx, const char *key);
+
+void index_values_free(struct index_value *values);
+
+/* Implementation using mmap */
+struct index_mm;
+int index_mm_open(const struct kmod_ctx *ctx, const char *filename,
+		  unsigned long long *stamp, struct index_mm **pidx);
+void index_mm_close(struct index_mm *index);
+char *index_mm_search(struct index_mm *idx, const char *key);
+struct index_value *index_mm_searchwild(struct index_mm *idx, const char *key);
+void index_mm_dump(struct index_mm *idx, int fd, const char *prefix);
diff --git a/libkmod/libkmod-internal.h b/libkmod/libkmod-internal.h
new file mode 100644
index 0000000..26a7e28
--- /dev/null
+++ b/libkmod/libkmod-internal.h
@@ -0,0 +1,210 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <syslog.h>
+#include <limits.h>
+
+#include <shared/macro.h>
+#include <shared/missing.h>
+
+#include "libkmod.h"
+
+static _always_inline_ _printf_format_(2, 3) void
+	kmod_log_null(const struct kmod_ctx *ctx, const char *format, ...) {}
+
+#define kmod_log_cond(ctx, prio, arg...) \
+	do { \
+		if (kmod_get_log_priority(ctx) >= prio) \
+		kmod_log(ctx, prio, __FILE__, __LINE__, __func__, ## arg);\
+	} while (0)
+
+#ifdef ENABLE_LOGGING
+#  ifdef ENABLE_DEBUG
+#    define DBG(ctx, arg...) kmod_log_cond(ctx, LOG_DEBUG, ## arg)
+#  else
+#    define DBG(ctx, arg...) kmod_log_null(ctx, ## arg)
+#  endif
+#  define NOTICE(ctx, arg...) kmod_log_cond(ctx, LOG_NOTICE, ## arg)
+#  define INFO(ctx, arg...) kmod_log_cond(ctx, LOG_INFO, ## arg)
+#  define ERR(ctx, arg...) kmod_log_cond(ctx, LOG_ERR, ## arg)
+#else
+#  define DBG(ctx, arg...) kmod_log_null(ctx, ## arg)
+#  define NOTICE(ctx, arg...) kmod_log_null(ctx, ## arg)
+#  define INFO(ctx, arg...) kmod_log_null(ctx, ## arg)
+#  define ERR(ctx, arg...) kmod_log_null(ctx, ## arg)
+#endif
+
+#define KMOD_EXPORT __attribute__ ((visibility("default")))
+
+#define KCMD_LINE_SIZE 4096
+
+#ifndef HAVE_SECURE_GETENV
+#  ifdef HAVE___SECURE_GETENV
+#    define secure_getenv __secure_getenv
+#  else
+#    warning neither secure_getenv nor __secure_getenv is available
+#    define secure_getenv getenv
+#  endif
+#endif
+
+void kmod_log(const struct kmod_ctx *ctx,
+		int priority, const char *file, int line, const char *fn,
+		const char *format, ...) __attribute__((format(printf, 6, 7))) __attribute__((nonnull(1, 3, 5)));
+
+struct list_node {
+	struct list_node *next, *prev;
+};
+
+struct kmod_list {
+	struct list_node node;
+	void *data;
+};
+
+enum kmod_file_compression_type {
+	KMOD_FILE_COMPRESSION_NONE = 0,
+	KMOD_FILE_COMPRESSION_ZSTD,
+	KMOD_FILE_COMPRESSION_XZ,
+	KMOD_FILE_COMPRESSION_ZLIB,
+};
+
+struct kmod_list *kmod_list_append(struct kmod_list *list, const void *data) _must_check_ __attribute__((nonnull(2)));
+struct kmod_list *kmod_list_prepend(struct kmod_list *list, const void *data) _must_check_ __attribute__((nonnull(2)));
+struct kmod_list *kmod_list_remove(struct kmod_list *list) _must_check_;
+struct kmod_list *kmod_list_remove_data(struct kmod_list *list,
+					const void *data) _must_check_ __attribute__((nonnull(2)));
+struct kmod_list *kmod_list_remove_n_latest(struct kmod_list *list,
+						unsigned int n) _must_check_;
+struct kmod_list *kmod_list_insert_after(struct kmod_list *list, const void *data) __attribute__((nonnull(2)));
+struct kmod_list *kmod_list_insert_before(struct kmod_list *list, const void *data) __attribute__((nonnull(2)));
+struct kmod_list *kmod_list_append_list(struct kmod_list *list1, struct kmod_list *list2) _must_check_;
+
+#undef kmod_list_foreach
+#define kmod_list_foreach(list_entry, first_entry) \
+	for (list_entry = ((first_entry) == NULL) ? NULL : (first_entry); \
+		list_entry != NULL; \
+		list_entry = (list_entry->node.next == &((first_entry)->node)) ? NULL : \
+		container_of(list_entry->node.next, struct kmod_list, node))
+
+#undef kmod_list_foreach_reverse
+#define kmod_list_foreach_reverse(list_entry, first_entry) \
+	for (list_entry = (((first_entry) == NULL) ? NULL : container_of(first_entry->node.prev, struct kmod_list, node)); \
+		list_entry != NULL; \
+		list_entry = ((list_entry == first_entry) ? NULL :	\
+		container_of(list_entry->node.prev, struct kmod_list, node)))
+
+/* libkmod.c */
+int kmod_lookup_alias_from_config(struct kmod_ctx *ctx, const char *name, struct kmod_list **list) __attribute__((nonnull(1, 2, 3)));
+int kmod_lookup_alias_from_symbols_file(struct kmod_ctx *ctx, const char *name, struct kmod_list **list) __attribute__((nonnull(1, 2, 3)));
+int kmod_lookup_alias_from_aliases_file(struct kmod_ctx *ctx, const char *name, struct kmod_list **list) __attribute__((nonnull(1, 2, 3)));
+int kmod_lookup_alias_from_moddep_file(struct kmod_ctx *ctx, const char *name, struct kmod_list **list) __attribute__((nonnull(1, 2, 3)));
+int kmod_lookup_alias_from_kernel_builtin_file(struct kmod_ctx *ctx, const char *name, struct kmod_list **list) __attribute__((nonnull(1, 2, 3)));
+int kmod_lookup_alias_from_builtin_file(struct kmod_ctx *ctx, const char *name, struct kmod_list **list) __attribute__((nonnull(1, 2, 3)));
+bool kmod_lookup_alias_is_builtin(struct kmod_ctx *ctx, const char *name) __attribute__((nonnull(1, 2)));
+int kmod_lookup_alias_from_commands(struct kmod_ctx *ctx, const char *name, struct kmod_list **list) __attribute__((nonnull(1, 2, 3)));
+void kmod_set_modules_visited(struct kmod_ctx *ctx, bool visited) __attribute__((nonnull((1))));
+void kmod_set_modules_required(struct kmod_ctx *ctx, bool required) __attribute__((nonnull((1))));
+
+char *kmod_search_moddep(struct kmod_ctx *ctx, const char *name) __attribute__((nonnull(1,2)));
+
+struct kmod_module *kmod_pool_get_module(struct kmod_ctx *ctx, const char *key) __attribute__((nonnull(1,2)));
+void kmod_pool_add_module(struct kmod_ctx *ctx, struct kmod_module *mod, const char *key) __attribute__((nonnull(1, 2, 3)));
+void kmod_pool_del_module(struct kmod_ctx *ctx, struct kmod_module *mod, const char *key) __attribute__((nonnull(1, 2, 3)));
+
+const struct kmod_config *kmod_get_config(const struct kmod_ctx *ctx) __attribute__((nonnull(1)));
+enum kmod_file_compression_type kmod_get_kernel_compression(const struct kmod_ctx *ctx) __attribute__((nonnull(1)));
+
+/* libkmod-config.c */
+struct kmod_config_path {
+	unsigned long long stamp;
+	char path[];
+};
+
+struct kmod_config {
+	struct kmod_ctx *ctx;
+	struct kmod_list *aliases;
+	struct kmod_list *blacklists;
+	struct kmod_list *options;
+	struct kmod_list *remove_commands;
+	struct kmod_list *install_commands;
+	struct kmod_list *softdeps;
+
+	struct kmod_list *paths;
+};
+
+int kmod_config_new(struct kmod_ctx *ctx, struct kmod_config **config, const char * const *config_paths) __attribute__((nonnull(1, 2,3)));
+void kmod_config_free(struct kmod_config *config) __attribute__((nonnull(1)));
+const char *kmod_blacklist_get_modname(const struct kmod_list *l) __attribute__((nonnull(1)));
+const char *kmod_alias_get_name(const struct kmod_list *l) __attribute__((nonnull(1)));
+const char *kmod_alias_get_modname(const struct kmod_list *l) __attribute__((nonnull(1)));
+const char *kmod_option_get_options(const struct kmod_list *l) __attribute__((nonnull(1)));
+const char *kmod_option_get_modname(const struct kmod_list *l) __attribute__((nonnull(1)));
+const char *kmod_command_get_command(const struct kmod_list *l) __attribute__((nonnull(1)));
+const char *kmod_command_get_modname(const struct kmod_list *l) __attribute__((nonnull(1)));
+
+const char *kmod_softdep_get_name(const struct kmod_list *l) __attribute__((nonnull(1)));
+const char * const *kmod_softdep_get_pre(const struct kmod_list *l, unsigned int *count) __attribute__((nonnull(1, 2)));
+const char * const *kmod_softdep_get_post(const struct kmod_list *l, unsigned int *count);
+
+
+/* libkmod-module.c */
+int kmod_module_new_from_alias(struct kmod_ctx *ctx, const char *alias, const char *name, struct kmod_module **mod);
+int kmod_module_parse_depline(struct kmod_module *mod, char *line) __attribute__((nonnull(1, 2)));
+void kmod_module_set_install_commands(struct kmod_module *mod, const char *cmd) __attribute__((nonnull(1)));
+void kmod_module_set_remove_commands(struct kmod_module *mod, const char *cmd) __attribute__((nonnull(1)));
+void kmod_module_set_visited(struct kmod_module *mod, bool visited) __attribute__((nonnull(1)));
+void kmod_module_set_builtin(struct kmod_module *mod, bool builtin) __attribute__((nonnull((1))));
+void kmod_module_set_required(struct kmod_module *mod, bool required) __attribute__((nonnull(1)));
+bool kmod_module_is_builtin(struct kmod_module *mod) __attribute__((nonnull(1)));
+
+/* libkmod-file.c */
+struct kmod_file *kmod_file_open(const struct kmod_ctx *ctx, const char *filename) _must_check_ __attribute__((nonnull(1,2)));
+struct kmod_elf *kmod_file_get_elf(struct kmod_file *file) __attribute__((nonnull(1)));
+void kmod_file_load_contents(struct kmod_file *file) __attribute__((nonnull(1)));
+void *kmod_file_get_contents(const struct kmod_file *file) _must_check_ __attribute__((nonnull(1)));
+off_t kmod_file_get_size(const struct kmod_file *file) _must_check_ __attribute__((nonnull(1)));
+enum kmod_file_compression_type kmod_file_get_compression(const struct kmod_file *file) _must_check_ __attribute__((nonnull(1)));
+int kmod_file_get_fd(const struct kmod_file *file) _must_check_ __attribute__((nonnull(1)));
+void kmod_file_unref(struct kmod_file *file) __attribute__((nonnull(1)));
+
+/* libkmod-elf.c */
+struct kmod_elf;
+struct kmod_modversion {
+	uint64_t crc;
+	enum kmod_symbol_bind bind;
+	char *symbol;
+};
+
+struct kmod_elf *kmod_elf_new(const void *memory, off_t size) _must_check_;
+void kmod_elf_unref(struct kmod_elf *elf) __attribute__((nonnull(1)));
+const void *kmod_elf_get_memory(const struct kmod_elf *elf) _must_check_ __attribute__((nonnull(1)));
+int kmod_elf_get_strings(const struct kmod_elf *elf, const char *section, char ***array) _must_check_ __attribute__((nonnull(1,2,3)));
+int kmod_elf_get_modversions(const struct kmod_elf *elf, struct kmod_modversion **array) _must_check_ __attribute__((nonnull(1,2)));
+int kmod_elf_get_symbols(const struct kmod_elf *elf, struct kmod_modversion **array) _must_check_ __attribute__((nonnull(1,2)));
+int kmod_elf_get_dependency_symbols(const struct kmod_elf *elf, struct kmod_modversion **array) _must_check_ __attribute__((nonnull(1,2)));
+int kmod_elf_strip_section(struct kmod_elf *elf, const char *section) _must_check_ __attribute__((nonnull(1,2)));
+int kmod_elf_strip_vermagic(struct kmod_elf *elf) _must_check_ __attribute__((nonnull(1)));
+
+/*
+ * Debug mock lib need to find section ".gnu.linkonce.this_module" in order to
+ * get modname
+ */
+int kmod_elf_get_section(const struct kmod_elf *elf, const char *section, const void **buf, uint64_t *buf_size) _must_check_ __attribute__((nonnull(1,2,3,4)));
+
+/* libkmod-signature.c */
+struct kmod_signature_info {
+	const char *signer;
+	size_t signer_len;
+	const char *key_id;
+	size_t key_id_len;
+	const char *algo, *hash_algo, *id_type;
+	const char *sig;
+	size_t sig_len;
+	void (*free)(void *);
+	void *private;
+};
+bool kmod_module_signature_info(const struct kmod_file *file, struct kmod_signature_info *sig_info) _must_check_ __attribute__((nonnull(1, 2)));
+void kmod_module_signature_info_free(struct kmod_signature_info *sig_info) __attribute__((nonnull));
+
+/* libkmod-builtin.c */
+ssize_t kmod_builtin_get_modinfo(struct kmod_ctx *ctx, const char *modname, char ***modinfo) __attribute__((nonnull(1, 2, 3)));
diff --git a/libkmod/libkmod-list.c b/libkmod/libkmod-list.c
new file mode 100644
index 0000000..7623693
--- /dev/null
+++ b/libkmod/libkmod-list.c
@@ -0,0 +1,314 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+
+#include "libkmod.h"
+#include "libkmod-internal.h"
+
+/**
+ * SECTION:libkmod-list
+ * @short_description: general purpose list
+ */
+
+static inline struct list_node *list_node_init(struct list_node *node)
+{
+	node->next = node;
+	node->prev = node;
+
+	return node;
+}
+
+static inline void list_node_append(struct list_node *list,
+							struct list_node *node)
+{
+	if (list == NULL) {
+		list_node_init(node);
+		return;
+	}
+
+	node->prev = list->prev;
+	list->prev->next = node;
+	list->prev = node;
+	node->next = list;
+}
+
+static inline struct list_node *list_node_remove(struct list_node *node)
+{
+	if (node->prev == node || node->next == node)
+		return NULL;
+
+	node->prev->next = node->next;
+	node->next->prev = node->prev;
+
+	return node->next;
+}
+
+static inline void list_node_insert_after(struct list_node *list,
+							struct list_node *node)
+{
+	if (list == NULL) {
+		list_node_init(node);
+		return;
+	}
+
+	node->prev = list;
+	node->next = list->next;
+	list->next->prev = node;
+	list->next = node;
+}
+
+static inline void list_node_insert_before(struct list_node *list,
+							struct list_node *node)
+{
+	if (list == NULL) {
+		list_node_init(node);
+		return;
+	}
+
+	node->next = list;
+	node->prev = list->prev;
+	list->prev->next = node;
+	list->prev = node;
+}
+
+static inline void list_node_append_list(struct list_node *list1,
+							struct list_node *list2)
+{
+	struct list_node *list1_last;
+
+	if (list1 == NULL) {
+		list_node_init(list2);
+		return;
+	}
+
+	list1->prev->next = list2;
+	list2->prev->next = list1;
+
+	/* cache the last, because we will lose the pointer */
+	list1_last = list1->prev;
+
+	list1->prev = list2->prev;
+	list2->prev = list1_last;
+}
+
+struct kmod_list *kmod_list_append(struct kmod_list *list, const void *data)
+{
+	struct kmod_list *new;
+
+	new = malloc(sizeof(*new));
+	if (new == NULL)
+		return NULL;
+
+	new->data = (void *)data;
+	list_node_append(list ? &list->node : NULL, &new->node);
+
+	return list ? list : new;
+}
+
+struct kmod_list *kmod_list_insert_after(struct kmod_list *list,
+							const void *data)
+{
+	struct kmod_list *new;
+
+	if (list == NULL)
+		return kmod_list_append(list, data);
+
+	new = malloc(sizeof(*new));
+	if (new == NULL)
+		return NULL;
+
+	new->data = (void *)data;
+	list_node_insert_after(&list->node, &new->node);
+
+	return list;
+}
+
+struct kmod_list *kmod_list_insert_before(struct kmod_list *list,
+							const void *data)
+{
+	struct kmod_list *new;
+
+	if (list == NULL)
+		return kmod_list_append(list, data);
+
+	new = malloc(sizeof(*new));
+	if (new == NULL)
+		return NULL;
+
+	new->data = (void *)data;
+	list_node_insert_before(&list->node, &new->node);
+
+	return new;
+}
+
+struct kmod_list *kmod_list_append_list(struct kmod_list *list1,
+						struct kmod_list *list2)
+{
+	if (list1 == NULL)
+		return list2;
+
+	if (list2 == NULL)
+		return list1;
+
+	list_node_append_list(&list1->node, &list2->node);
+
+	return list1;
+}
+
+struct kmod_list *kmod_list_prepend(struct kmod_list *list, const void *data)
+{
+	struct kmod_list *new;
+
+	new = malloc(sizeof(*new));
+	if (new == NULL)
+		return NULL;
+
+	new->data = (void *)data;
+	list_node_append(list ? &list->node : NULL, &new->node);
+
+	return new;
+}
+
+struct kmod_list *kmod_list_remove(struct kmod_list *list)
+{
+	struct list_node *node;
+
+	if (list == NULL)
+		return NULL;
+
+	node = list_node_remove(&list->node);
+	free(list);
+
+	if (node == NULL)
+		return NULL;
+
+	return container_of(node, struct kmod_list, node);
+}
+
+struct kmod_list *kmod_list_remove_data(struct kmod_list *list,
+							const void *data)
+{
+	struct kmod_list *itr;
+	struct list_node *node;
+
+	for (itr = list; itr != NULL; itr = kmod_list_next(list, itr)) {
+		if (itr->data == data)
+			break;
+	}
+
+	if (itr == NULL)
+		return list;
+
+	node = list_node_remove(&itr->node);
+	free(itr);
+
+	if (node == NULL)
+		return NULL;
+
+	return container_of(node, struct kmod_list, node);
+}
+
+/*
+ * n must be greater to or equal the number of elements (we don't check the
+ * condition)
+ */
+struct kmod_list *kmod_list_remove_n_latest(struct kmod_list *list,
+							unsigned int n)
+{
+	struct kmod_list *l = list;
+	unsigned int i;
+
+	for (i = 0; i < n; i++) {
+		l = kmod_list_last(l);
+		l = kmod_list_remove(l);
+	}
+
+	return l;
+}
+
+/**
+ * kmod_list_prev:
+ * @list: the head of the list
+ * @curr: the current node in the list
+ *
+ * Get the previous node in @list relative to @curr as if @list was not a
+ * circular list. I.e.: the previous of the head is NULL. It can be used to
+ * iterate a list by checking for NULL return to know when all elements were
+ * iterated.
+ *
+ * Returns: node previous to @curr or NULL if either this node is the head of
+ * the list or the list is empty.
+ */
+KMOD_EXPORT struct kmod_list *kmod_list_prev(const struct kmod_list *list,
+						const struct kmod_list *curr)
+{
+	if (list == NULL || curr == NULL)
+		return NULL;
+
+	if (list == curr)
+		return NULL;
+
+	return container_of(curr->node.prev, struct kmod_list, node);
+}
+
+/**
+ * kmod_list_next:
+ * @list: the head of the list
+ * @curr: the current node in the list
+ *
+ * Get the next node in @list relative to @curr as if @list was not a circular
+ * list. I.e. calling this function in the last node of the list returns
+ * NULL.. It can be used to iterate a list by checking for NULL return to know
+ * when all elements were iterated.
+ *
+ * Returns: node next to @curr or NULL if either this node is the last of or
+ * list is empty.
+ */
+KMOD_EXPORT struct kmod_list *kmod_list_next(const struct kmod_list *list,
+						const struct kmod_list *curr)
+{
+	if (list == NULL || curr == NULL)
+		return NULL;
+
+	if (curr->node.next == &list->node)
+		return NULL;
+
+	return container_of(curr->node.next, struct kmod_list, node);
+}
+
+/**
+ * kmod_list_last:
+ * @list: the head of the list
+ *
+ * Get the last element of the @list. As @list is a circular list,
+ * this is a cheap operation O(1) with the last element being the
+ * previous element.
+ *
+ * If the list has a single element it will return the list itself (as
+ * expected, and this is what differentiates from kmod_list_prev()).
+ *
+ * Returns: last node at @list or NULL if the list is empty.
+ */
+KMOD_EXPORT struct kmod_list *kmod_list_last(const struct kmod_list *list)
+{
+	if (list == NULL)
+		return NULL;
+	return container_of(list->node.prev, struct kmod_list, node);
+}
diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
new file mode 100644
index 0000000..585da41
--- /dev/null
+++ b/libkmod/libkmod-module.c
@@ -0,0 +1,2986 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fnmatch.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#ifdef HAVE_LINUX_MODULE_H
+#include <linux/module.h>
+#endif
+
+#include <shared/util.h>
+
+#include "libkmod.h"
+#include "libkmod-internal.h"
+
+/**
+ * SECTION:libkmod-module
+ * @short_description: operate on kernel modules
+ */
+
+enum kmod_module_builtin {
+    KMOD_MODULE_BUILTIN_UNKNOWN,
+    KMOD_MODULE_BUILTIN_NO,
+    KMOD_MODULE_BUILTIN_YES,
+};
+
+/**
+ * kmod_module:
+ *
+ * Opaque object representing a module.
+ */
+struct kmod_module {
+	struct kmod_ctx *ctx;
+	char *hashkey;
+	char *name;
+	char *path;
+	struct kmod_list *dep;
+	char *options;
+	const char *install_commands;	/* owned by kmod_config */
+	const char *remove_commands;	/* owned by kmod_config */
+	char *alias; /* only set if this module was created from an alias */
+	struct kmod_file *file;
+	int n_dep;
+	int refcount;
+	struct {
+		bool dep : 1;
+		bool options : 1;
+		bool install_commands : 1;
+		bool remove_commands : 1;
+	} init;
+
+	/*
+	 * mark if module is builtin, i.e. it's present on modules.builtin
+	 * file. This is set as soon as it is needed or as soon as we know
+	 * about it, i.e. the module was created from builtin lookup.
+	 */
+	enum kmod_module_builtin builtin;
+
+	/*
+	 * private field used by kmod_module_get_probe_list() to detect
+	 * dependency loops
+	 */
+	bool visited : 1;
+
+	/*
+	 * set by kmod_module_get_probe_list: indicates for probe_insert()
+	 * whether the module's command and softdep should be ignored
+	 */
+	bool ignorecmd : 1;
+
+	/*
+	 * set by kmod_module_get_probe_list: indicates whether this is the
+	 * module the user asked for or its dependency, or whether this
+	 * is a softdep only
+	 */
+	bool required : 1;
+};
+
+static inline const char *path_join(const char *path, size_t prefixlen,
+							char buf[PATH_MAX])
+{
+	size_t pathlen;
+
+	if (path[0] == '/')
+		return path;
+
+	pathlen = strlen(path);
+	if (prefixlen + pathlen + 1 >= PATH_MAX)
+		return NULL;
+
+	memcpy(buf + prefixlen, path, pathlen + 1);
+	return buf;
+}
+
+static inline bool module_is_inkernel(struct kmod_module *mod)
+{
+	int state = kmod_module_get_initstate(mod);
+
+	if (state == KMOD_MODULE_LIVE ||
+			state == KMOD_MODULE_BUILTIN)
+		return true;
+
+	return false;
+}
+
+int kmod_module_parse_depline(struct kmod_module *mod, char *line)
+{
+	struct kmod_ctx *ctx = mod->ctx;
+	struct kmod_list *list = NULL;
+	const char *dirname;
+	char buf[PATH_MAX];
+	char *p, *saveptr;
+	int err = 0, n = 0;
+	size_t dirnamelen;
+
+	if (mod->init.dep)
+		return mod->n_dep;
+	assert(mod->dep == NULL);
+	mod->init.dep = true;
+
+	p = strchr(line, ':');
+	if (p == NULL)
+		return 0;
+
+	*p = '\0';
+	dirname = kmod_get_dirname(mod->ctx);
+	dirnamelen = strlen(dirname);
+	if (dirnamelen + 2 >= PATH_MAX)
+		return 0;
+
+	memcpy(buf, dirname, dirnamelen);
+	buf[dirnamelen] = '/';
+	dirnamelen++;
+	buf[dirnamelen] = '\0';
+
+	if (mod->path == NULL) {
+		const char *str = path_join(line, dirnamelen, buf);
+		if (str == NULL)
+			return 0;
+		mod->path = strdup(str);
+		if (mod->path == NULL)
+			return 0;
+	}
+
+	p++;
+	for (p = strtok_r(p, " \t", &saveptr); p != NULL;
+					p = strtok_r(NULL, " \t", &saveptr)) {
+		struct kmod_module *depmod = NULL;
+		const char *path;
+
+		path = path_join(p, dirnamelen, buf);
+		if (path == NULL) {
+			ERR(ctx, "could not join path '%s' and '%s'.\n",
+			    dirname, p);
+			goto fail;
+		}
+
+		err = kmod_module_new_from_path(ctx, path, &depmod);
+		if (err < 0) {
+			ERR(ctx, "ctx=%p path=%s error=%s\n",
+						ctx, path, strerror(-err));
+			goto fail;
+		}
+
+		DBG(ctx, "add dep: %s\n", path);
+
+		list = kmod_list_prepend(list, depmod);
+		n++;
+	}
+
+	DBG(ctx, "%d dependencies for %s\n", n, mod->name);
+
+	mod->dep = list;
+	mod->n_dep = n;
+	return n;
+
+fail:
+	kmod_module_unref_list(list);
+	mod->init.dep = false;
+	return err;
+}
+
+void kmod_module_set_visited(struct kmod_module *mod, bool visited)
+{
+	mod->visited = visited;
+}
+
+void kmod_module_set_builtin(struct kmod_module *mod, bool builtin)
+{
+	mod->builtin =
+		builtin ? KMOD_MODULE_BUILTIN_YES : KMOD_MODULE_BUILTIN_NO;
+}
+
+void kmod_module_set_required(struct kmod_module *mod, bool required)
+{
+	mod->required = required;
+}
+
+bool kmod_module_is_builtin(struct kmod_module *mod)
+{
+	if (mod->builtin == KMOD_MODULE_BUILTIN_UNKNOWN) {
+		kmod_module_set_builtin(mod,
+					kmod_lookup_alias_is_builtin(mod->ctx, mod->name));
+	}
+
+	return mod->builtin == KMOD_MODULE_BUILTIN_YES;
+}
+/*
+ * Memory layout with alias:
+ *
+ * struct kmod_module {
+ *        hashkey -----.
+ *        alias -----. |
+ *        name ----. | |
+ * }               | | |
+ * name <----------' | |
+ * alias <-----------' |
+ * name\alias <--------'
+ *
+ * Memory layout without alias:
+ *
+ * struct kmod_module {
+ *        hashkey ---.
+ *        alias -----|----> NULL
+ *        name ----. |
+ * }               | |
+ * name <----------'-'
+ *
+ * @key is "name\alias" or "name" (in which case alias == NULL)
+ */
+static int kmod_module_new(struct kmod_ctx *ctx, const char *key,
+				const char *name, size_t namelen,
+				const char *alias, size_t aliaslen,
+				struct kmod_module **mod)
+{
+	struct kmod_module *m;
+	size_t keylen;
+
+	m = kmod_pool_get_module(ctx, key);
+	if (m != NULL) {
+		*mod = kmod_module_ref(m);
+		return 0;
+	}
+
+	if (alias == NULL)
+		keylen = namelen;
+	else
+		keylen = namelen + aliaslen + 1;
+
+	m = malloc(sizeof(*m) + (alias == NULL ? 1 : 2) * (keylen + 1));
+	if (m == NULL)
+		return -ENOMEM;
+
+	memset(m, 0, sizeof(*m));
+
+	m->ctx = kmod_ref(ctx);
+	m->name = (char *)m + sizeof(*m);
+	memcpy(m->name, key, keylen + 1);
+	if (alias == NULL) {
+		m->hashkey = m->name;
+		m->alias = NULL;
+	} else {
+		m->name[namelen] = '\0';
+		m->alias = m->name + namelen + 1;
+		m->hashkey = m->name + keylen + 1;
+		memcpy(m->hashkey, key, keylen + 1);
+	}
+
+	m->refcount = 1;
+	kmod_pool_add_module(ctx, m, m->hashkey);
+	*mod = m;
+
+	return 0;
+}
+
+/**
+ * kmod_module_new_from_name:
+ * @ctx: kmod library context
+ * @name: name of the module
+ * @mod: where to save the created struct kmod_module
+ *
+ * Create a new struct kmod_module using the module name. @name can not be an
+ * alias, file name or anything else; it must be a module name. There's no
+ * check if the module exists in the system.
+ *
+ * This function is also used internally by many others that return a new
+ * struct kmod_module or a new list of modules.
+ *
+ * The initial refcount is 1, and needs to be decremented to release the
+ * resources of the kmod_module. Since libkmod keeps track of all
+ * kmod_modules created, they are all released upon @ctx destruction too. Do
+ * not unref @ctx before all the desired operations with the returned
+ * kmod_module are done.
+ *
+ * Returns: 0 on success or < 0 otherwise. It fails if name is not a valid
+ * module name or if memory allocation failed.
+ */
+KMOD_EXPORT int kmod_module_new_from_name(struct kmod_ctx *ctx,
+						const char *name,
+						struct kmod_module **mod)
+{
+	size_t namelen;
+	char name_norm[PATH_MAX];
+
+	if (ctx == NULL || name == NULL || mod == NULL)
+		return -ENOENT;
+
+	modname_normalize(name, name_norm, &namelen);
+
+	return kmod_module_new(ctx, name_norm, name_norm, namelen, NULL, 0, mod);
+}
+
+int kmod_module_new_from_alias(struct kmod_ctx *ctx, const char *alias,
+				const char *name, struct kmod_module **mod)
+{
+	int err;
+	char key[PATH_MAX];
+	size_t namelen = strlen(name);
+	size_t aliaslen = strlen(alias);
+
+	if (namelen + aliaslen + 2 > PATH_MAX)
+		return -ENAMETOOLONG;
+
+	memcpy(key, name, namelen);
+	memcpy(key + namelen + 1, alias, aliaslen + 1);
+	key[namelen] = '\\';
+
+	err = kmod_module_new(ctx, key, name, namelen, alias, aliaslen, mod);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+/**
+ * kmod_module_new_from_path:
+ * @ctx: kmod library context
+ * @path: path where to find the given module
+ * @mod: where to save the created struct kmod_module
+ *
+ * Create a new struct kmod_module using the module path. @path must be an
+ * existent file with in the filesystem and must be accessible to libkmod.
+ *
+ * The initial refcount is 1, and needs to be decremented to release the
+ * resources of the kmod_module. Since libkmod keeps track of all
+ * kmod_modules created, they are all released upon @ctx destruction too. Do
+ * not unref @ctx before all the desired operations with the returned
+ * kmod_module are done.
+ *
+ * If @path is relative, it's treated as relative to the current working
+ * directory. Otherwise, give an absolute path.
+ *
+ * Returns: 0 on success or < 0 otherwise. It fails if file does not exist, if
+ * it's not a valid file for a kmod_module or if memory allocation failed.
+ */
+KMOD_EXPORT int kmod_module_new_from_path(struct kmod_ctx *ctx,
+						const char *path,
+						struct kmod_module **mod)
+{
+	struct kmod_module *m;
+	int err;
+	struct stat st;
+	char name[PATH_MAX];
+	char *abspath;
+	size_t namelen;
+
+	if (ctx == NULL || path == NULL || mod == NULL)
+		return -ENOENT;
+
+	abspath = path_make_absolute_cwd(path);
+	if (abspath == NULL) {
+		DBG(ctx, "no absolute path for %s\n", path);
+		return -ENOMEM;
+	}
+
+	err = stat(abspath, &st);
+	if (err < 0) {
+		err = -errno;
+		DBG(ctx, "stat %s: %s\n", path, strerror(errno));
+		free(abspath);
+		return err;
+	}
+
+	if (path_to_modname(path, name, &namelen) == NULL) {
+		DBG(ctx, "could not get modname from path %s\n", path);
+		free(abspath);
+		return -ENOENT;
+	}
+
+	m = kmod_pool_get_module(ctx, name);
+	if (m != NULL) {
+		if (m->path == NULL)
+			m->path = abspath;
+		else if (streq(m->path, abspath))
+			free(abspath);
+		else {
+			ERR(ctx, "kmod_module '%s' already exists with different path: new-path='%s' old-path='%s'\n",
+							name, abspath, m->path);
+			free(abspath);
+			return -EEXIST;
+		}
+
+		kmod_module_ref(m);
+	} else {
+		err = kmod_module_new(ctx, name, name, namelen, NULL, 0, &m);
+		if (err < 0) {
+			free(abspath);
+			return err;
+		}
+
+		m->path = abspath;
+	}
+
+	m->builtin = KMOD_MODULE_BUILTIN_NO;
+	*mod = m;
+
+	return 0;
+}
+
+/**
+ * kmod_module_unref:
+ * @mod: kmod module
+ *
+ * Drop a reference of the kmod module. If the refcount reaches zero, its
+ * resources are released.
+ *
+ * Returns: NULL if @mod is NULL or if the module was released. Otherwise it
+ * returns the passed @mod with its refcount decremented.
+ */
+KMOD_EXPORT struct kmod_module *kmod_module_unref(struct kmod_module *mod)
+{
+	if (mod == NULL)
+		return NULL;
+
+	if (--mod->refcount > 0)
+		return mod;
+
+	DBG(mod->ctx, "kmod_module %p released\n", mod);
+
+	kmod_pool_del_module(mod->ctx, mod, mod->hashkey);
+	kmod_module_unref_list(mod->dep);
+
+	if (mod->file)
+		kmod_file_unref(mod->file);
+
+	kmod_unref(mod->ctx);
+	free(mod->options);
+	free(mod->path);
+	free(mod);
+	return NULL;
+}
+
+/**
+ * kmod_module_ref:
+ * @mod: kmod module
+ *
+ * Take a reference of the kmod module, incrementing its refcount.
+ *
+ * Returns: the passed @module with its refcount incremented.
+ */
+KMOD_EXPORT struct kmod_module *kmod_module_ref(struct kmod_module *mod)
+{
+	if (mod == NULL)
+		return NULL;
+
+	mod->refcount++;
+
+	return mod;
+}
+
+typedef int (*lookup_func)(struct kmod_ctx *ctx, const char *name, struct kmod_list **list) __attribute__((nonnull(1, 2, 3)));
+
+static int __kmod_module_new_from_lookup(struct kmod_ctx *ctx, const lookup_func lookup[],
+					 size_t lookup_count, const char *s,
+					 struct kmod_list **list)
+{
+	unsigned int i;
+
+	for (i = 0; i < lookup_count; i++) {
+		int err;
+
+		err = lookup[i](ctx, s, list);
+		if (err < 0 && err != -ENOSYS)
+			return err;
+		else if (*list != NULL)
+			return 0;
+	}
+
+	return 0;
+}
+
+/**
+ * kmod_module_new_from_lookup:
+ * @ctx: kmod library context
+ * @given_alias: alias to look for
+ * @list: an empty list where to save the list of modules matching
+ * @given_alias
+ *
+ * Create a new list of kmod modules using an alias or module name and lookup
+ * libkmod's configuration files and indexes in order to find the module.
+ * Once it's found in one of the places, it stops searching and create the
+ * list of modules that is saved in @list.
+ *
+ * The search order is: 1. aliases in configuration file; 2. module names in
+ * modules.dep index; 3. symbol aliases in modules.symbols index; 4. aliases
+ * from install commands; 5. builtin indexes from kernel.
+ *
+ * The initial refcount is 1, and needs to be decremented to release the
+ * resources of the kmod_module. The returned @list must be released by
+ * calling kmod_module_unref_list(). Since libkmod keeps track of all
+ * kmod_modules created, they are all released upon @ctx destruction too. Do
+ * not unref @ctx before all the desired operations with the returned list are
+ * completed.
+ *
+ * Returns: 0 on success or < 0 otherwise. It fails if any of the lookup
+ * methods failed, which is basically due to memory allocation fail. If module
+ * is not found, it still returns 0, but @list is an empty list.
+ */
+KMOD_EXPORT int kmod_module_new_from_lookup(struct kmod_ctx *ctx,
+						const char *given_alias,
+						struct kmod_list **list)
+{
+	static const lookup_func lookup[] = {
+		kmod_lookup_alias_from_config,
+		kmod_lookup_alias_from_moddep_file,
+		kmod_lookup_alias_from_symbols_file,
+		kmod_lookup_alias_from_commands,
+		kmod_lookup_alias_from_aliases_file,
+		kmod_lookup_alias_from_builtin_file,
+		kmod_lookup_alias_from_kernel_builtin_file,
+	};
+	char alias[PATH_MAX];
+	int err;
+
+	if (ctx == NULL || given_alias == NULL)
+		return -ENOENT;
+
+	if (list == NULL || *list != NULL) {
+		ERR(ctx, "An empty list is needed to create lookup\n");
+		return -ENOSYS;
+	}
+
+	if (alias_normalize(given_alias, alias, NULL) < 0) {
+		DBG(ctx, "invalid alias: %s\n", given_alias);
+		return -EINVAL;
+	}
+
+	DBG(ctx, "input alias=%s, normalized=%s\n", given_alias, alias);
+
+	err = __kmod_module_new_from_lookup(ctx, lookup, ARRAY_SIZE(lookup),
+					    alias, list);
+
+	DBG(ctx, "lookup=%s found=%d\n", alias, err >= 0 && *list);
+
+	if (err < 0) {
+		kmod_module_unref_list(*list);
+		*list = NULL;
+	}
+
+	return err;
+}
+
+/**
+ * kmod_module_new_from_name_lookup:
+ * @ctx: kmod library context
+ * @modname: module name to look for
+ * @mod: returned module on success
+ *
+ * Lookup by module name, without considering possible aliases. This is similar
+ * to kmod_module_new_from_lookup(), but don't consider as source indexes and
+ * configurations that work with aliases. When succesful, this always resolves
+ * to one and only one module.
+ *
+ * The search order is: 1. module names in modules.dep index;
+ * 2. builtin indexes from kernel.
+ *
+ * The initial refcount is 1, and needs to be decremented to release the
+ * resources of the kmod_module. Since libkmod keeps track of all
+ * kmod_modules created, they are all released upon @ctx destruction too. Do
+ * not unref @ctx before all the desired operations with the returned list are
+ * completed.
+ *
+ * Returns: 0 on success or < 0 otherwise. It fails if any of the lookup
+ * methods failed, which is basically due to memory allocation failure. If
+ * module is not found, it still returns 0, but @mod is left untouched.
+ */
+KMOD_EXPORT int kmod_module_new_from_name_lookup(struct kmod_ctx *ctx,
+						 const char *modname,
+						 struct kmod_module **mod)
+{
+	static const lookup_func lookup[] = {
+		kmod_lookup_alias_from_moddep_file,
+		kmod_lookup_alias_from_builtin_file,
+		kmod_lookup_alias_from_kernel_builtin_file,
+	};
+	char name_norm[PATH_MAX];
+	struct kmod_list *list = NULL;
+	int err;
+
+	if (ctx == NULL || modname == NULL || mod == NULL)
+		return -ENOENT;
+
+	modname_normalize(modname, name_norm, NULL);
+
+	DBG(ctx, "input modname=%s, normalized=%s\n", modname, name_norm);
+
+	err = __kmod_module_new_from_lookup(ctx, lookup, ARRAY_SIZE(lookup),
+					    name_norm, &list);
+
+	DBG(ctx, "lookup=%s found=%d\n", name_norm, err >= 0 && list);
+
+	if (err >= 0 && list != NULL)
+		*mod = kmod_module_get_module(list);
+
+	kmod_module_unref_list(list);
+
+	return err;
+}
+
+/**
+ * kmod_module_unref_list:
+ * @list: list of kmod modules
+ *
+ * Drop a reference of each kmod module in @list and releases the resources
+ * taken by the list itself.
+ *
+ * Returns: 0
+ */
+KMOD_EXPORT int kmod_module_unref_list(struct kmod_list *list)
+{
+	for (; list != NULL; list = kmod_list_remove(list))
+		kmod_module_unref(list->data);
+
+	return 0;
+}
+
+/**
+ * kmod_module_get_filtered_blacklist:
+ * @ctx: kmod library context
+ * @input: list of kmod_module to be filtered with blacklist
+ * @output: where to save the new list
+ *
+ * This function should not be used. Use kmod_module_apply_filter instead.
+ *
+ * Given a list @input, this function filter it out with config's blacklist
+ * and save it in @output.
+ *
+ * Returns: 0 on success or < 0 otherwise. @output is saved with the updated
+ * list.
+ */
+KMOD_EXPORT int kmod_module_get_filtered_blacklist(const struct kmod_ctx *ctx,
+						const struct kmod_list *input,
+						struct kmod_list **output)
+{
+	return kmod_module_apply_filter(ctx, KMOD_FILTER_BLACKLIST, input, output);
+}
+
+static const struct kmod_list *module_get_dependencies_noref(const struct kmod_module *mod)
+{
+	if (!mod->init.dep) {
+		/* lazy init */
+		char *line = kmod_search_moddep(mod->ctx, mod->name);
+
+		if (line == NULL)
+			return NULL;
+
+		kmod_module_parse_depline((struct kmod_module *)mod, line);
+		free(line);
+
+		if (!mod->init.dep)
+			return NULL;
+	}
+
+	return mod->dep;
+}
+
+/**
+ * kmod_module_get_dependencies:
+ * @mod: kmod module
+ *
+ * Search the modules.dep index to find the dependencies of the given @mod.
+ * The result is cached in @mod, so subsequent calls to this function will
+ * return the already searched list of modules.
+ *
+ * Returns: NULL on failure. Otherwise it returns a list of kmod modules
+ * that can be released by calling kmod_module_unref_list().
+ */
+KMOD_EXPORT struct kmod_list *kmod_module_get_dependencies(const struct kmod_module *mod)
+{
+	struct kmod_list *l, *l_new, *list_new = NULL;
+
+	if (mod == NULL)
+		return NULL;
+
+	module_get_dependencies_noref(mod);
+
+	kmod_list_foreach(l, mod->dep) {
+		l_new = kmod_list_append(list_new, kmod_module_ref(l->data));
+		if (l_new == NULL) {
+			kmod_module_unref(l->data);
+			goto fail;
+		}
+
+		list_new = l_new;
+	}
+
+	return list_new;
+
+fail:
+	ERR(mod->ctx, "out of memory\n");
+	kmod_module_unref_list(list_new);
+	return NULL;
+}
+
+/**
+ * kmod_module_get_module:
+ * @entry: an entry in a list of kmod modules.
+ *
+ * Get the kmod module of this @entry in the list, increasing its refcount.
+ * After it's used, unref it. Since the refcount is incremented upon return,
+ * you still have to call kmod_module_unref_list() to release the list of kmod
+ * modules.
+ *
+ * Returns: NULL on failure or the kmod_module contained in this list entry
+ * with its refcount incremented.
+ */
+KMOD_EXPORT struct kmod_module *kmod_module_get_module(const struct kmod_list *entry)
+{
+	if (entry == NULL)
+		return NULL;
+
+	return kmod_module_ref(entry->data);
+}
+
+/**
+ * kmod_module_get_name:
+ * @mod: kmod module
+ *
+ * Get the name of this kmod module. Name is always available, independently
+ * if it was created by kmod_module_new_from_name() or another function and
+ * it's always normalized (dashes are replaced with underscores).
+ *
+ * Returns: the name of this kmod module.
+ */
+KMOD_EXPORT const char *kmod_module_get_name(const struct kmod_module *mod)
+{
+	if (mod == NULL)
+		return NULL;
+
+	return mod->name;
+}
+
+/**
+ * kmod_module_get_path:
+ * @mod: kmod module
+ *
+ * Get the path of this kmod module. If this kmod module was not created by
+ * path, it can search the modules.dep index in order to find out the module
+ * under context's dirname.
+ *
+ * Returns: the path of this kmod module or NULL if such information is not
+ * available.
+ */
+KMOD_EXPORT const char *kmod_module_get_path(const struct kmod_module *mod)
+{
+	char *line;
+
+	if (mod == NULL)
+		return NULL;
+
+	DBG(mod->ctx, "name='%s' path='%s'\n", mod->name, mod->path);
+
+	if (mod->path != NULL)
+		return mod->path;
+	if (mod->init.dep)
+		return NULL;
+
+	/* lazy init */
+	line = kmod_search_moddep(mod->ctx, mod->name);
+	if (line == NULL)
+		return NULL;
+
+	kmod_module_parse_depline((struct kmod_module *) mod, line);
+	free(line);
+
+	return mod->path;
+}
+
+
+extern long delete_module(const char *name, unsigned int flags);
+
+/**
+ * kmod_module_remove_module:
+ * @mod: kmod module
+ * @flags: flags used when removing the module.
+ * KMOD_REMOVE_FORCE: force remove module regardless if it's still in
+ * use by a kernel subsystem or other process; passed directly to Linux kernel
+ * KMOD_REMOVE_NOWAIT: is always enforced, causing us to pass O_NONBLOCK to
+ * delete_module(2).
+ * KMOD_REMOVE_NOLOG: when module removal fails, do not log anything as the
+ * caller may want to handle retries and log when appropriate.
+ *
+ * Remove a module from Linux kernel.
+ *
+ * Returns: 0 on success or < 0 on failure.
+ */
+KMOD_EXPORT int kmod_module_remove_module(struct kmod_module *mod,
+							unsigned int flags)
+{
+	unsigned int libkmod_flags = flags & 0xff;
+
+	int err;
+
+	if (mod == NULL)
+		return -ENOENT;
+
+	/* Filter out other flags and force ONONBLOCK */
+	flags &= KMOD_REMOVE_FORCE;
+	flags |= KMOD_REMOVE_NOWAIT;
+
+	err = delete_module(mod->name, flags);
+	if (err != 0) {
+		err = -errno;
+		if (!(libkmod_flags & KMOD_REMOVE_NOLOG))
+			ERR(mod->ctx, "could not remove '%s': %m\n", mod->name);
+	}
+
+	return err;
+}
+
+extern long init_module(const void *mem, unsigned long len, const char *args);
+
+static int do_finit_module(struct kmod_module *mod, unsigned int flags,
+			   const char *args)
+{
+	enum kmod_file_compression_type compression, kernel_compression;
+	unsigned int kernel_flags = 0;
+	int err;
+
+	/*
+	 * When module is not compressed or its compression type matches the
+	 * one in use by the kernel, there is no need to read the file
+	 * in userspace. Otherwise, re-use ENOSYS to trigger the same fallback
+	 * as when finit_module() is not supported.
+	 */
+	compression = kmod_file_get_compression(mod->file);
+	kernel_compression = kmod_get_kernel_compression(mod->ctx);
+	if (!(compression == KMOD_FILE_COMPRESSION_NONE ||
+	      compression == kernel_compression))
+		return -ENOSYS;
+
+	if (compression != KMOD_FILE_COMPRESSION_NONE)
+		kernel_flags |= MODULE_INIT_COMPRESSED_FILE;
+
+	if (flags & KMOD_INSERT_FORCE_VERMAGIC)
+		kernel_flags |= MODULE_INIT_IGNORE_VERMAGIC;
+	if (flags & KMOD_INSERT_FORCE_MODVERSION)
+		kernel_flags |= MODULE_INIT_IGNORE_MODVERSIONS;
+
+	err = finit_module(kmod_file_get_fd(mod->file), args, kernel_flags);
+	if (err < 0)
+		err = -errno;
+
+	return err;
+}
+
+static int do_init_module(struct kmod_module *mod, unsigned int flags,
+			  const char *args)
+{
+	struct kmod_elf *elf;
+	const void *mem;
+	off_t size;
+	int err;
+
+	kmod_file_load_contents(mod->file);
+
+	if (flags & (KMOD_INSERT_FORCE_VERMAGIC | KMOD_INSERT_FORCE_MODVERSION)) {
+		elf = kmod_file_get_elf(mod->file);
+		if (elf == NULL) {
+			err = -errno;
+			return err;
+		}
+
+		if (flags & KMOD_INSERT_FORCE_MODVERSION) {
+			err = kmod_elf_strip_section(elf, "__versions");
+			if (err < 0)
+				INFO(mod->ctx, "Failed to strip modversion: %s\n", strerror(-err));
+		}
+
+		if (flags & KMOD_INSERT_FORCE_VERMAGIC) {
+			err = kmod_elf_strip_vermagic(elf);
+			if (err < 0)
+				INFO(mod->ctx, "Failed to strip vermagic: %s\n", strerror(-err));
+		}
+
+		mem = kmod_elf_get_memory(elf);
+	} else {
+		mem = kmod_file_get_contents(mod->file);
+	}
+	size = kmod_file_get_size(mod->file);
+
+	err = init_module(mem, size, args);
+	if (err < 0)
+		err = -errno;
+
+	return err;
+}
+
+/**
+ * kmod_module_insert_module:
+ * @mod: kmod module
+ * @flags: flags are not passed to Linux Kernel, but instead they dictate the
+ * behavior of this function, valid flags are
+ * KMOD_INSERT_FORCE_VERMAGIC: ignore kernel version magic;
+ * KMOD_INSERT_FORCE_MODVERSION: ignore symbol version hashes.
+ * @options: module's options to pass to Linux Kernel.
+ *
+ * Insert a module in Linux kernel. It opens the file pointed by @mod,
+ * mmap'ing it and passing to kernel.
+ *
+ * Returns: 0 on success or < 0 on failure. If module is already loaded it
+ * returns -EEXIST.
+ */
+KMOD_EXPORT int kmod_module_insert_module(struct kmod_module *mod,
+							unsigned int flags,
+							const char *options)
+{
+	int err;
+	const char *path;
+	const char *args = options ? options : "";
+
+	if (mod == NULL)
+		return -ENOENT;
+
+	path = kmod_module_get_path(mod);
+	if (path == NULL) {
+		ERR(mod->ctx, "could not find module by name='%s'\n", mod->name);
+		return -ENOENT;
+	}
+
+	if (!mod->file) {
+		mod->file = kmod_file_open(mod->ctx, path);
+		if (mod->file == NULL) {
+			err = -errno;
+			return err;
+		}
+	}
+
+	err = do_finit_module(mod, flags, args);
+	if (err == -ENOSYS)
+		err = do_init_module(mod, flags, args);
+
+	if (err < 0)
+		INFO(mod->ctx, "Failed to insert module '%s': %s\n",
+		     path, strerror(-err));
+
+	return err;
+}
+
+static bool module_is_blacklisted(struct kmod_module *mod)
+{
+	struct kmod_ctx *ctx = mod->ctx;
+	const struct kmod_config *config = kmod_get_config(ctx);
+	const struct kmod_list *bl = config->blacklists;
+	const struct kmod_list *l;
+
+	kmod_list_foreach(l, bl) {
+		const char *modname = kmod_blacklist_get_modname(l);
+
+		if (streq(modname, mod->name))
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * kmod_module_apply_filter
+ * @ctx: kmod library context
+ * @filter_type: bitmask to filter modules out, valid types are
+ * KMOD_FILTER_BLACKLIST: filter modules in blacklist out;
+ * KMOD_FILTER_BUILTIN: filter builtin modules out.
+ * @input: list of kmod_module to be filtered
+ * @output: where to save the new list
+ *
+ * Given a list @input, this function filter it out by the filter mask
+ * and save it in @output.
+ *
+ * Returns: 0 on success or < 0 otherwise. @output is saved with the updated
+ * list.
+ */
+KMOD_EXPORT int kmod_module_apply_filter(const struct kmod_ctx *ctx,
+						enum kmod_filter filter_type,
+						const struct kmod_list *input,
+						struct kmod_list **output)
+{
+	const struct kmod_list *li;
+
+	if (ctx == NULL || output == NULL)
+		return -ENOENT;
+
+	*output = NULL;
+	if (input == NULL)
+		return 0;
+
+	kmod_list_foreach(li, input) {
+		struct kmod_module *mod = li->data;
+		struct kmod_list *node;
+
+		if ((filter_type & KMOD_FILTER_BLACKLIST) &&
+				module_is_blacklisted(mod))
+			continue;
+
+		if ((filter_type & KMOD_FILTER_BUILTIN)
+		    && kmod_module_is_builtin(mod))
+			continue;
+
+		node = kmod_list_append(*output, mod);
+		if (node == NULL)
+			goto fail;
+
+		*output = node;
+		kmod_module_ref(mod);
+	}
+
+	return 0;
+
+fail:
+	kmod_module_unref_list(*output);
+	*output = NULL;
+	return -ENOMEM;
+}
+
+static int command_do(struct kmod_module *mod, const char *type,
+							const char *cmd)
+{
+	const char *modname = kmod_module_get_name(mod);
+	int err;
+
+	DBG(mod->ctx, "%s %s\n", type, cmd);
+
+	setenv("MODPROBE_MODULE", modname, 1);
+	err = system(cmd);
+	unsetenv("MODPROBE_MODULE");
+
+	if (err == -1) {
+		ERR(mod->ctx, "Could not run %s command '%s' for module %s: %m\n",
+		    type, cmd, modname);
+		return -EINVAL;
+	}
+
+	if (WEXITSTATUS(err)) {
+		ERR(mod->ctx, "Error running %s command '%s' for module %s: retcode %d\n",
+		    type, cmd, modname, WEXITSTATUS(err));
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+struct probe_insert_cb {
+	int (*run_install)(struct kmod_module *m, const char *cmd, void *data);
+	void *data;
+};
+
+static int module_do_install_commands(struct kmod_module *mod,
+					const char *options,
+					struct probe_insert_cb *cb)
+{
+	const char *command = kmod_module_get_install_commands(mod);
+	char *p;
+	_cleanup_free_ char *cmd;
+	int err;
+	size_t cmdlen, options_len, varlen;
+
+	assert(command);
+
+	if (options == NULL)
+		options = "";
+
+	options_len = strlen(options);
+	cmdlen = strlen(command);
+	varlen = sizeof("$CMDLINE_OPTS") - 1;
+
+	cmd = memdup(command, cmdlen + 1);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	while ((p = strstr(cmd, "$CMDLINE_OPTS")) != NULL) {
+		size_t prefixlen = p - cmd;
+		size_t suffixlen = cmdlen - prefixlen - varlen;
+		size_t slen = cmdlen - varlen + options_len;
+		char *suffix = p + varlen;
+		char *s = malloc(slen + 1);
+		if (!s)
+			return -ENOMEM;
+
+		memcpy(s, cmd, p - cmd);
+		memcpy(s + prefixlen, options, options_len);
+		memcpy(s + prefixlen + options_len, suffix, suffixlen);
+		s[slen] = '\0';
+
+		free(cmd);
+		cmd = s;
+		cmdlen = slen;
+	}
+
+	if (cb->run_install != NULL)
+		err = cb->run_install(mod, cmd, cb->data);
+	else
+		err = command_do(mod, "install", cmd);
+
+	return err;
+}
+
+static char *module_options_concat(const char *opt, const char *xopt)
+{
+	// TODO: we might need to check if xopt overrides options on opt
+	size_t optlen = opt == NULL ? 0 : strlen(opt);
+	size_t xoptlen = xopt == NULL ? 0 : strlen(xopt);
+	char *r;
+
+	if (optlen == 0 && xoptlen == 0)
+		return NULL;
+
+	r = malloc(optlen + xoptlen + 2);
+
+	if (opt != NULL) {
+		memcpy(r, opt, optlen);
+		r[optlen] = ' ';
+		optlen++;
+	}
+
+	if (xopt != NULL)
+		memcpy(r + optlen, xopt, xoptlen);
+
+	r[optlen + xoptlen] = '\0';
+
+	return r;
+}
+
+static int __kmod_module_get_probe_list(struct kmod_module *mod,
+						bool required,
+						bool ignorecmd,
+						struct kmod_list **list);
+
+/* re-entrant */
+static int __kmod_module_fill_softdep(struct kmod_module *mod,
+						struct kmod_list **list)
+{
+	struct kmod_list *pre = NULL, *post = NULL, *l;
+	int err;
+
+	err = kmod_module_get_softdeps(mod, &pre, &post);
+	if (err < 0) {
+		ERR(mod->ctx, "could not get softdep: %s\n",
+							strerror(-err));
+		goto fail;
+	}
+
+	kmod_list_foreach(l, pre) {
+		struct kmod_module *m = l->data;
+		err = __kmod_module_get_probe_list(m, false, false, list);
+		if (err < 0)
+			goto fail;
+	}
+
+	l = kmod_list_append(*list, kmod_module_ref(mod));
+	if (l == NULL) {
+		kmod_module_unref(mod);
+		err = -ENOMEM;
+		goto fail;
+	}
+	*list = l;
+	mod->ignorecmd = (pre != NULL || post != NULL);
+
+	kmod_list_foreach(l, post) {
+		struct kmod_module *m = l->data;
+		err = __kmod_module_get_probe_list(m, false, false, list);
+		if (err < 0)
+			goto fail;
+	}
+
+fail:
+	kmod_module_unref_list(pre);
+	kmod_module_unref_list(post);
+
+	return err;
+}
+
+/* re-entrant */
+static int __kmod_module_get_probe_list(struct kmod_module *mod,
+						bool required,
+						bool ignorecmd,
+						struct kmod_list **list)
+{
+	struct kmod_list *dep, *l;
+	int err = 0;
+
+	if (mod->visited) {
+		DBG(mod->ctx, "Ignore module '%s': already visited\n",
+								mod->name);
+		return 0;
+	}
+	mod->visited = true;
+
+	dep = kmod_module_get_dependencies(mod);
+	if (required) {
+		/*
+		 * Called from kmod_module_probe_insert_module(); set the
+		 * ->required flag on mod and all its dependencies before
+		 * they are possibly visited through some softdeps.
+		 */
+		mod->required = true;
+		kmod_list_foreach(l, dep) {
+			struct kmod_module *m = l->data;
+			m->required = true;
+		}
+	}
+
+	kmod_list_foreach(l, dep) {
+		struct kmod_module *m = l->data;
+		err = __kmod_module_fill_softdep(m, list);
+		if (err < 0)
+			goto finish;
+	}
+
+	if (ignorecmd) {
+		l = kmod_list_append(*list, kmod_module_ref(mod));
+		if (l == NULL) {
+			kmod_module_unref(mod);
+			err = -ENOMEM;
+			goto finish;
+		}
+		*list = l;
+		mod->ignorecmd = true;
+	} else
+		err = __kmod_module_fill_softdep(mod, list);
+
+finish:
+	kmod_module_unref_list(dep);
+	return err;
+}
+
+static int kmod_module_get_probe_list(struct kmod_module *mod,
+						bool ignorecmd,
+						struct kmod_list **list)
+{
+	int err;
+
+	assert(mod != NULL);
+	assert(list != NULL && *list == NULL);
+
+	/*
+	 * Make sure we don't get screwed by previous calls to this function
+	 */
+	kmod_set_modules_visited(mod->ctx, false);
+	kmod_set_modules_required(mod->ctx, false);
+
+	err = __kmod_module_get_probe_list(mod, true, ignorecmd, list);
+	if (err < 0) {
+		kmod_module_unref_list(*list);
+		*list = NULL;
+	}
+
+	return err;
+}
+
+/**
+ * kmod_module_probe_insert_module:
+ * @mod: kmod module
+ * @flags: flags are not passed to Linux Kernel, but instead they dictate the
+ * behavior of this function, valid flags are
+ * KMOD_PROBE_FORCE_VERMAGIC: ignore kernel version magic;
+ * KMOD_PROBE_FORCE_MODVERSION: ignore symbol version hashes;
+ * KMOD_PROBE_IGNORE_COMMAND: whether the probe should ignore install
+ * commands and softdeps configured in the system;
+ * KMOD_PROBE_IGNORE_LOADED: do not check whether the module is already
+ * live in kernel or not;
+ * KMOD_PROBE_DRY_RUN: dry run, do not insert module, just call the
+ * associated callback function;
+ * KMOD_PROBE_FAIL_ON_LOADED: if KMOD_PROBE_IGNORE_LOADED is not specified
+ * and the module is already live in kernel, the function will fail if this
+ * flag is specified;
+ * KMOD_PROBE_APPLY_BLACKLIST_ALL: probe will apply KMOD_FILTER_BLACKLIST
+ * filter to this module and its dependencies. If any of the dependencies (or
+ * the module) is blacklisted, the probe will fail, unless the blacklisted
+ * module is already live in kernel;
+ * KMOD_PROBE_APPLY_BLACKLIST: probe will fail if the module is blacklisted;
+ * KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY: probe will fail if the module is an
+ * alias and is blacklisted.
+ * @extra_options: module's options to pass to Linux Kernel. It applies only
+ * to @mod, not to its dependencies.
+ * @run_install: function to run when @mod is backed by an install command.
+ * @data: data to give back to @run_install callback
+ * @print_action: function to call with the action being taken (install or
+ * insmod). It's useful for tools like modprobe when running with verbose
+ * output or in dry-run mode.
+ *
+ * Insert a module in Linux kernel resolving dependencies, soft dependencies,
+ * install commands and applying blacklist.
+ *
+ * If @run_install is NULL, this function will fork and exec by calling
+ * system(3). Don't pass a NULL argument in @run_install if your binary is
+ * setuid/setgid (see warning in system(3)). If you need control over the
+ * execution of an install command, give a callback function instead.
+ *
+ * Returns: 0 on success, > 0 if stopped by a reason given in @flags or < 0 on
+ * failure.
+ */
+KMOD_EXPORT int kmod_module_probe_insert_module(struct kmod_module *mod,
+			unsigned int flags, const char *extra_options,
+			int (*run_install)(struct kmod_module *m,
+						const char *cmd, void *data),
+			const void *data,
+			void (*print_action)(struct kmod_module *m,
+						bool install,
+						const char *options))
+{
+	struct kmod_list *list = NULL, *l;
+	struct probe_insert_cb cb;
+	int err;
+
+	if (mod == NULL)
+		return -ENOENT;
+
+	if (!(flags & KMOD_PROBE_IGNORE_LOADED)
+					&& module_is_inkernel(mod)) {
+		if (flags & KMOD_PROBE_FAIL_ON_LOADED)
+			return -EEXIST;
+		else
+			return 0;
+	}
+
+	/*
+	 * Ugly assignement + check. We need to check if we were told to check
+	 * blacklist and also return the reason why we failed.
+	 * KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY will take effect only if the
+	 * module is an alias, so we also need to check it
+	 */
+	if ((mod->alias != NULL && ((err = flags & KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY)))
+			|| (err = flags & KMOD_PROBE_APPLY_BLACKLIST_ALL)
+			|| (err = flags & KMOD_PROBE_APPLY_BLACKLIST)) {
+		if (module_is_blacklisted(mod))
+			return err;
+	}
+
+	err = kmod_module_get_probe_list(mod,
+				!!(flags & KMOD_PROBE_IGNORE_COMMAND), &list);
+	if (err < 0)
+		return err;
+
+	if (flags & KMOD_PROBE_APPLY_BLACKLIST_ALL) {
+		struct kmod_list *filtered = NULL;
+
+		err = kmod_module_apply_filter(mod->ctx,
+				KMOD_FILTER_BLACKLIST, list, &filtered);
+		if (err < 0)
+			return err;
+
+		kmod_module_unref_list(list);
+		if (filtered == NULL)
+			return KMOD_PROBE_APPLY_BLACKLIST_ALL;
+
+		list = filtered;
+	}
+
+	cb.run_install = run_install;
+	cb.data = (void *) data;
+
+	kmod_list_foreach(l, list) {
+		struct kmod_module *m = l->data;
+		const char *moptions = kmod_module_get_options(m);
+		const char *cmd = kmod_module_get_install_commands(m);
+		char *options;
+
+		if (!(flags & KMOD_PROBE_IGNORE_LOADED)
+						&& module_is_inkernel(m)) {
+			DBG(mod->ctx, "Ignoring module '%s': already loaded\n",
+								m->name);
+			err = -EEXIST;
+			goto finish_module;
+		}
+
+		options = module_options_concat(moptions,
+					m == mod ? extra_options : NULL);
+
+		if (cmd != NULL && !m->ignorecmd) {
+			if (print_action != NULL)
+				print_action(m, true, options ?: "");
+
+			if (!(flags & KMOD_PROBE_DRY_RUN))
+				err = module_do_install_commands(m, options,
+									&cb);
+		} else {
+			if (print_action != NULL)
+				print_action(m, false, options ?: "");
+
+			if (!(flags & KMOD_PROBE_DRY_RUN))
+				err = kmod_module_insert_module(m, flags,
+								options);
+		}
+
+		free(options);
+
+finish_module:
+		/*
+		 * Treat "already loaded" error. If we were told to stop on
+		 * already loaded and the module being loaded is not a softdep
+		 * or dep, bail out. Otherwise, just ignore and continue.
+		 *
+		 * We need to check here because of race conditions. We
+		 * checked first if module was already loaded but it may have
+		 * been loaded between the check and the moment we try to
+		 * insert it.
+		 */
+		if (err == -EEXIST && m == mod &&
+				(flags & KMOD_PROBE_FAIL_ON_LOADED))
+			break;
+
+		/*
+		 * Ignore errors from softdeps
+		 */
+		if (err == -EEXIST || !m->required)
+			err = 0;
+
+		else if (err < 0)
+			break;
+	}
+
+	kmod_module_unref_list(list);
+	return err;
+}
+
+/**
+ * kmod_module_get_options:
+ * @mod: kmod module
+ *
+ * Get options of this kmod module. Options come from the configuration file
+ * and are cached in @mod. The first call to this function will search for
+ * this module in configuration and subsequent calls return the cached string.
+ *
+ * Returns: a string with all the options separated by spaces. This string is
+ * owned by @mod, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_get_options(const struct kmod_module *mod)
+{
+	if (mod == NULL)
+		return NULL;
+
+	if (!mod->init.options) {
+		/* lazy init */
+		struct kmod_module *m = (struct kmod_module *)mod;
+		const struct kmod_list *l;
+		const struct kmod_config *config;
+		char *opts = NULL;
+		size_t optslen = 0;
+
+		config = kmod_get_config(mod->ctx);
+
+		kmod_list_foreach(l, config->options) {
+			const char *modname = kmod_option_get_modname(l);
+			const char *str;
+			size_t len;
+			void *tmp;
+
+			DBG(mod->ctx, "modname=%s mod->name=%s mod->alias=%s\n", modname, mod->name, mod->alias);
+			if (!(streq(modname, mod->name) || (mod->alias != NULL &&
+						streq(modname, mod->alias))))
+				continue;
+
+			DBG(mod->ctx, "passed = modname=%s mod->name=%s mod->alias=%s\n", modname, mod->name, mod->alias);
+			str = kmod_option_get_options(l);
+			len = strlen(str);
+			if (len < 1)
+				continue;
+
+			tmp = realloc(opts, optslen + len + 2);
+			if (tmp == NULL) {
+				free(opts);
+				goto failed;
+			}
+
+			opts = tmp;
+
+			if (optslen > 0) {
+				opts[optslen] = ' ';
+				optslen++;
+			}
+
+			memcpy(opts + optslen, str, len);
+			optslen += len;
+			opts[optslen] = '\0';
+		}
+
+		m->init.options = true;
+		m->options = opts;
+	}
+
+	return mod->options;
+
+failed:
+	ERR(mod->ctx, "out of memory\n");
+	return NULL;
+}
+
+/**
+ * kmod_module_get_install_commands:
+ * @mod: kmod module
+ *
+ * Get install commands for this kmod module. Install commands come from the
+ * configuration file and are cached in @mod. The first call to this function
+ * will search for this module in configuration and subsequent calls return
+ * the cached string. The install commands are returned as they were in the
+ * configuration, concatenated by ';'. No other processing is made in this
+ * string.
+ *
+ * Returns: a string with all install commands separated by semicolons. This
+ * string is owned by @mod, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_get_install_commands(const struct kmod_module *mod)
+{
+	if (mod == NULL)
+		return NULL;
+
+	if (!mod->init.install_commands) {
+		/* lazy init */
+		struct kmod_module *m = (struct kmod_module *)mod;
+		const struct kmod_list *l;
+		const struct kmod_config *config;
+
+		config = kmod_get_config(mod->ctx);
+
+		kmod_list_foreach(l, config->install_commands) {
+			const char *modname = kmod_command_get_modname(l);
+
+			if (fnmatch(modname, mod->name, 0) != 0)
+				continue;
+
+			m->install_commands = kmod_command_get_command(l);
+
+			/*
+			 * find only the first command, as modprobe from
+			 * module-init-tools does
+			 */
+			break;
+		}
+
+		m->init.install_commands = true;
+	}
+
+	return mod->install_commands;
+}
+
+void kmod_module_set_install_commands(struct kmod_module *mod, const char *cmd)
+{
+	mod->init.install_commands = true;
+	mod->install_commands = cmd;
+}
+
+static struct kmod_list *lookup_softdep(struct kmod_ctx *ctx, const char * const * array, unsigned int count)
+{
+	struct kmod_list *ret = NULL;
+	unsigned i;
+
+	for (i = 0; i < count; i++) {
+		const char *depname = array[i];
+		struct kmod_list *lst = NULL;
+		int err;
+
+		err = kmod_module_new_from_lookup(ctx, depname, &lst);
+		if (err < 0) {
+			ERR(ctx, "failed to lookup soft dependency '%s', continuing anyway.\n", depname);
+			continue;
+		} else if (lst != NULL)
+			ret = kmod_list_append_list(ret, lst);
+	}
+	return ret;
+}
+
+/**
+ * kmod_module_get_softdeps:
+ * @mod: kmod module
+ * @pre: where to save the list of preceding soft dependencies.
+ * @post: where to save the list of post soft dependencies.
+ *
+ * Get soft dependencies for this kmod module. Soft dependencies come
+ * from configuration file and are not cached in @mod because it may include
+ * dependency cycles that would make we leak kmod_module. Any call
+ * to this function will search for this module in configuration, allocate a
+ * list and return the result.
+ *
+ * Both @pre and @post are newly created list of kmod_module and
+ * should be unreferenced with kmod_module_unref_list().
+ *
+ * Returns: 0 on success or < 0 otherwise.
+ */
+KMOD_EXPORT int kmod_module_get_softdeps(const struct kmod_module *mod,
+						struct kmod_list **pre,
+						struct kmod_list **post)
+{
+	const struct kmod_list *l;
+	const struct kmod_config *config;
+
+	if (mod == NULL || pre == NULL || post == NULL)
+		return -ENOENT;
+
+	assert(*pre == NULL);
+	assert(*post == NULL);
+
+	config = kmod_get_config(mod->ctx);
+
+	kmod_list_foreach(l, config->softdeps) {
+		const char *modname = kmod_softdep_get_name(l);
+		const char * const *array;
+		unsigned count;
+
+		if (fnmatch(modname, mod->name, 0) != 0)
+			continue;
+
+		array = kmod_softdep_get_pre(l, &count);
+		*pre = lookup_softdep(mod->ctx, array, count);
+		array = kmod_softdep_get_post(l, &count);
+		*post = lookup_softdep(mod->ctx, array, count);
+
+		/*
+		 * find only the first command, as modprobe from
+		 * module-init-tools does
+		 */
+		break;
+	}
+
+	return 0;
+}
+
+/**
+ * kmod_module_get_remove_commands:
+ * @mod: kmod module
+ *
+ * Get remove commands for this kmod module. Remove commands come from the
+ * configuration file and are cached in @mod. The first call to this function
+ * will search for this module in configuration and subsequent calls return
+ * the cached string. The remove commands are returned as they were in the
+ * configuration, concatenated by ';'. No other processing is made in this
+ * string.
+ *
+ * Returns: a string with all remove commands separated by semicolons. This
+ * string is owned by @mod, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_get_remove_commands(const struct kmod_module *mod)
+{
+	if (mod == NULL)
+		return NULL;
+
+	if (!mod->init.remove_commands) {
+		/* lazy init */
+		struct kmod_module *m = (struct kmod_module *)mod;
+		const struct kmod_list *l;
+		const struct kmod_config *config;
+
+		config = kmod_get_config(mod->ctx);
+
+		kmod_list_foreach(l, config->remove_commands) {
+			const char *modname = kmod_command_get_modname(l);
+
+			if (fnmatch(modname, mod->name, 0) != 0)
+				continue;
+
+			m->remove_commands = kmod_command_get_command(l);
+
+			/*
+			 * find only the first command, as modprobe from
+			 * module-init-tools does
+			 */
+			break;
+		}
+
+		m->init.remove_commands = true;
+	}
+
+	return mod->remove_commands;
+}
+
+void kmod_module_set_remove_commands(struct kmod_module *mod, const char *cmd)
+{
+	mod->init.remove_commands = true;
+	mod->remove_commands = cmd;
+}
+
+/**
+ * SECTION:libkmod-loaded
+ * @short_description: currently loaded modules
+ *
+ * Information about currently loaded modules, as reported by Linux kernel.
+ * These information are not cached by libkmod and are always read from /sys
+ * and /proc/modules.
+ */
+
+/**
+ * kmod_module_new_from_loaded:
+ * @ctx: kmod library context
+ * @list: where to save the list of loaded modules
+ *
+ * Create a new list of kmod modules with all modules currently loaded in
+ * kernel. It uses /proc/modules to get the names of loaded modules and to
+ * create kmod modules by calling kmod_module_new_from_name() in each of them.
+ * They are put in @list in no particular order.
+ *
+ * The initial refcount is 1, and needs to be decremented to release the
+ * resources of the kmod_module. The returned @list must be released by
+ * calling kmod_module_unref_list(). Since libkmod keeps track of all
+ * kmod_modules created, they are all released upon @ctx destruction too. Do
+ * not unref @ctx before all the desired operations with the returned list are
+ * completed.
+ *
+ * Returns: 0 on success or < 0 on error.
+ */
+KMOD_EXPORT int kmod_module_new_from_loaded(struct kmod_ctx *ctx,
+						struct kmod_list **list)
+{
+	struct kmod_list *l = NULL;
+	FILE *fp;
+	char line[4096];
+
+	if (ctx == NULL || list == NULL)
+		return -ENOENT;
+
+	fp = fopen("/proc/modules", "re");
+	if (fp == NULL) {
+		int err = -errno;
+		ERR(ctx, "could not open /proc/modules: %s\n", strerror(errno));
+		return err;
+	}
+
+	while (fgets(line, sizeof(line), fp)) {
+		struct kmod_module *m;
+		struct kmod_list *node;
+		int err;
+		size_t len = strlen(line);
+		char *saveptr, *name = strtok_r(line, " \t", &saveptr);
+
+		err = kmod_module_new_from_name(ctx, name, &m);
+		if (err < 0) {
+			ERR(ctx, "could not get module from name '%s': %s\n",
+				name, strerror(-err));
+			goto eat_line;
+		}
+
+		node = kmod_list_append(l, m);
+		if (node)
+			l = node;
+		else {
+			ERR(ctx, "out of memory\n");
+			kmod_module_unref(m);
+		}
+eat_line:
+		while (line[len - 1] != '\n' && fgets(line, sizeof(line), fp))
+			len = strlen(line);
+	}
+
+	fclose(fp);
+	*list = l;
+
+	return 0;
+}
+
+/**
+ * kmod_module_initstate_str:
+ * @state: the state as returned by kmod_module_get_initstate()
+ *
+ * Translate a initstate to a string.
+ *
+ * Returns: the string associated to the @state. This string is statically
+ * allocated, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_initstate_str(enum kmod_module_initstate state)
+{
+	switch (state) {
+	case KMOD_MODULE_BUILTIN:
+		return "builtin";
+	case KMOD_MODULE_LIVE:
+		return "live";
+	case KMOD_MODULE_COMING:
+		return "coming";
+	case KMOD_MODULE_GOING:
+		return "going";
+	default:
+		return NULL;
+	}
+}
+
+/**
+ * kmod_module_get_initstate:
+ * @mod: kmod module
+ *
+ * Get the initstate of this @mod, as returned by Linux Kernel, by reading
+ * /sys filesystem.
+ *
+ * Returns: < 0 on error or module state if module is found in kernel, valid states are
+ * KMOD_MODULE_BUILTIN: module is builtin;
+ * KMOD_MODULE_LIVE: module is live in kernel;
+ * KMOD_MODULE_COMING: module is being loaded;
+ * KMOD_MODULE_GOING: module is being unloaded.
+ */
+KMOD_EXPORT int kmod_module_get_initstate(const struct kmod_module *mod)
+{
+	char path[PATH_MAX], buf[32];
+	int fd, err, pathlen;
+
+	if (mod == NULL)
+		return -ENOENT;
+
+	/* remove const: this can only change internal state */
+	if (kmod_module_is_builtin((struct kmod_module *)mod))
+		return KMOD_MODULE_BUILTIN;
+
+	pathlen = snprintf(path, sizeof(path),
+				"/sys/module/%s/initstate", mod->name);
+	if (pathlen >= (int)sizeof(path)) {
+		/* Too long path was truncated */
+		return -ENAMETOOLONG;
+	}
+	fd = open(path, O_RDONLY|O_CLOEXEC);
+	if (fd < 0) {
+		err = -errno;
+
+		DBG(mod->ctx, "could not open '%s': %s\n",
+			path, strerror(-err));
+
+		if (pathlen > (int)sizeof("/initstate") - 1) {
+			struct stat st;
+			path[pathlen - (sizeof("/initstate") - 1)] = '\0';
+			if (stat(path, &st) == 0 && S_ISDIR(st.st_mode))
+				return KMOD_MODULE_COMING;
+		}
+
+		DBG(mod->ctx, "could not open '%s': %s\n",
+			path, strerror(-err));
+		return err;
+	}
+
+	err = read_str_safe(fd, buf, sizeof(buf));
+	close(fd);
+	if (err < 0) {
+		ERR(mod->ctx, "could not read from '%s': %s\n",
+			path, strerror(-err));
+		return err;
+	}
+
+	if (streq(buf, "live\n"))
+		return KMOD_MODULE_LIVE;
+	else if (streq(buf, "coming\n"))
+		return KMOD_MODULE_COMING;
+	else if (streq(buf, "going\n"))
+		return KMOD_MODULE_GOING;
+
+	ERR(mod->ctx, "unknown %s: '%s'\n", path, buf);
+	return -EINVAL;
+}
+
+/**
+ * kmod_module_get_size:
+ * @mod: kmod module
+ *
+ * Get the size of this kmod module as returned by Linux kernel. If supported,
+ * the size is read from the coresize attribute in /sys/module. For older
+ * kernels, this falls back on /proc/modules and searches for the specified
+ * module to get its size.
+ *
+ * Returns: the size of this kmod module.
+ */
+KMOD_EXPORT long kmod_module_get_size(const struct kmod_module *mod)
+{
+	FILE *fp;
+	char line[4096];
+	int lineno = 0;
+	long size = -ENOENT;
+	int dfd, cfd;
+
+	if (mod == NULL)
+		return -ENOENT;
+
+	/* try to open the module dir in /sys. If this fails, don't
+	 * bother trying to find the size as we know the module isn't
+	 * loaded.
+	 */
+	snprintf(line, sizeof(line), "/sys/module/%s", mod->name);
+	dfd = open(line, O_RDONLY|O_CLOEXEC);
+	if (dfd < 0)
+		return -errno;
+
+	/* available as of linux 3.3.x */
+	cfd = openat(dfd, "coresize", O_RDONLY|O_CLOEXEC);
+	if (cfd >= 0) {
+		if (read_str_long(cfd, &size, 10) < 0)
+			ERR(mod->ctx, "failed to read coresize from %s\n", line);
+		close(cfd);
+		goto done;
+	}
+
+	/* fall back on parsing /proc/modules */
+	fp = fopen("/proc/modules", "re");
+	if (fp == NULL) {
+		int err = -errno;
+		ERR(mod->ctx,
+		    "could not open /proc/modules: %s\n", strerror(errno));
+		close(dfd);
+		return err;
+	}
+
+	while (fgets(line, sizeof(line), fp)) {
+		size_t len = strlen(line);
+		char *saveptr, *endptr, *tok = strtok_r(line, " \t", &saveptr);
+		long value;
+
+		lineno++;
+		if (tok == NULL || !streq(tok, mod->name))
+			goto eat_line;
+
+		tok = strtok_r(NULL, " \t", &saveptr);
+		if (tok == NULL) {
+			ERR(mod->ctx,
+			"invalid line format at /proc/modules:%d\n", lineno);
+			break;
+		}
+
+		value = strtol(tok, &endptr, 10);
+		if (endptr == tok || *endptr != '\0') {
+			ERR(mod->ctx,
+			"invalid line format at /proc/modules:%d\n", lineno);
+			break;
+		}
+
+		size = value;
+		break;
+eat_line:
+		while (line[len - 1] != '\n' && fgets(line, sizeof(line), fp))
+			len = strlen(line);
+	}
+	fclose(fp);
+
+done:
+	close(dfd);
+	return size;
+}
+
+/**
+ * kmod_module_get_refcnt:
+ * @mod: kmod module
+ *
+ * Get the ref count of this @mod, as returned by Linux Kernel, by reading
+ * /sys filesystem.
+ *
+ * Returns: the reference count on success or < 0 on failure.
+ */
+KMOD_EXPORT int kmod_module_get_refcnt(const struct kmod_module *mod)
+{
+	char path[PATH_MAX];
+	long refcnt;
+	int fd, err;
+
+	if (mod == NULL)
+		return -ENOENT;
+
+	snprintf(path, sizeof(path), "/sys/module/%s/refcnt", mod->name);
+	fd = open(path, O_RDONLY|O_CLOEXEC);
+	if (fd < 0) {
+		err = -errno;
+		DBG(mod->ctx, "could not open '%s': %s\n",
+			path, strerror(errno));
+		return err;
+	}
+
+	err = read_str_long(fd, &refcnt, 10);
+	close(fd);
+	if (err < 0) {
+		ERR(mod->ctx, "could not read integer from '%s': '%s'\n",
+			path, strerror(-err));
+		return err;
+	}
+
+	return (int)refcnt;
+}
+
+/**
+ * kmod_module_get_holders:
+ * @mod: kmod module
+ *
+ * Get a list of kmod modules that are holding this @mod, as returned by Linux
+ * Kernel. After use, free the @list by calling kmod_module_unref_list().
+ *
+ * Returns: a new list of kmod modules on success or NULL on failure.
+ */
+KMOD_EXPORT struct kmod_list *kmod_module_get_holders(const struct kmod_module *mod)
+{
+	char dname[PATH_MAX];
+	struct kmod_list *list = NULL;
+	struct dirent *dent;
+	DIR *d;
+
+	if (mod == NULL || mod->ctx == NULL)
+		return NULL;
+
+	snprintf(dname, sizeof(dname), "/sys/module/%s/holders", mod->name);
+
+	d = opendir(dname);
+	if (d == NULL) {
+		ERR(mod->ctx, "could not open '%s': %s\n",
+						dname, strerror(errno));
+		return NULL;
+	}
+
+	for (dent = readdir(d); dent != NULL; dent = readdir(d)) {
+		struct kmod_module *holder;
+		struct kmod_list *l;
+		int err;
+
+		if (dent->d_name[0] == '.') {
+			if (dent->d_name[1] == '\0' ||
+			    (dent->d_name[1] == '.' && dent->d_name[2] == '\0'))
+				continue;
+		}
+
+		err = kmod_module_new_from_name(mod->ctx, dent->d_name,
+						&holder);
+		if (err < 0) {
+			ERR(mod->ctx, "could not create module for '%s': %s\n",
+				dent->d_name, strerror(-err));
+			goto fail;
+		}
+
+		l = kmod_list_append(list, holder);
+		if (l != NULL) {
+			list = l;
+		} else {
+			ERR(mod->ctx, "out of memory\n");
+			kmod_module_unref(holder);
+			goto fail;
+		}
+	}
+
+	closedir(d);
+	return list;
+
+fail:
+	closedir(d);
+	kmod_module_unref_list(list);
+	return NULL;
+}
+
+struct kmod_module_section {
+	unsigned long address;
+	char name[];
+};
+
+static void kmod_module_section_free(struct kmod_module_section *section)
+{
+	free(section);
+}
+
+/**
+ * kmod_module_get_sections:
+ * @mod: kmod module
+ *
+ * Get a list of kmod sections of this @mod, as returned by Linux Kernel. The
+ * structure contained in this list is internal to libkmod and their fields
+ * can be obtained by calling kmod_module_section_get_name() and
+ * kmod_module_section_get_address().
+ *
+ * After use, free the @list by calling kmod_module_section_free_list().
+ *
+ * Returns: a new list of kmod module sections on success or NULL on failure.
+ */
+KMOD_EXPORT struct kmod_list *kmod_module_get_sections(const struct kmod_module *mod)
+{
+	char dname[PATH_MAX];
+	struct kmod_list *list = NULL;
+	struct dirent *dent;
+	DIR *d;
+	int dfd;
+
+	if (mod == NULL)
+		return NULL;
+
+	snprintf(dname, sizeof(dname), "/sys/module/%s/sections", mod->name);
+
+	d = opendir(dname);
+	if (d == NULL) {
+		ERR(mod->ctx, "could not open '%s': %s\n",
+			dname, strerror(errno));
+		return NULL;
+	}
+
+	dfd = dirfd(d);
+
+	for (dent = readdir(d); dent; dent = readdir(d)) {
+		struct kmod_module_section *section;
+		struct kmod_list *l;
+		unsigned long address;
+		size_t namesz;
+		int fd, err;
+
+		if (dent->d_name[0] == '.') {
+			if (dent->d_name[1] == '\0' ||
+			    (dent->d_name[1] == '.' && dent->d_name[2] == '\0'))
+				continue;
+		}
+
+		fd = openat(dfd, dent->d_name, O_RDONLY|O_CLOEXEC);
+		if (fd < 0) {
+			ERR(mod->ctx, "could not open '%s/%s': %m\n",
+							dname, dent->d_name);
+			goto fail;
+		}
+
+		err = read_str_ulong(fd, &address, 16);
+		close(fd);
+		if (err < 0) {
+			ERR(mod->ctx, "could not read long from '%s/%s': %m\n",
+							dname, dent->d_name);
+			goto fail;
+		}
+
+		namesz = strlen(dent->d_name) + 1;
+		section = malloc(sizeof(*section) + namesz);
+
+		if (section == NULL) {
+			ERR(mod->ctx, "out of memory\n");
+			goto fail;
+		}
+
+		section->address = address;
+		memcpy(section->name, dent->d_name, namesz);
+
+		l = kmod_list_append(list, section);
+		if (l != NULL) {
+			list = l;
+		} else {
+			ERR(mod->ctx, "out of memory\n");
+			free(section);
+			goto fail;
+		}
+	}
+
+	closedir(d);
+	return list;
+
+fail:
+	closedir(d);
+	kmod_module_unref_list(list);
+	return NULL;
+}
+
+/**
+ * kmod_module_section_get_module_name:
+ * @entry: a list entry representing a kmod module section
+ *
+ * Get the name of a kmod module section.
+ *
+ * After use, free the @list by calling kmod_module_section_free_list().
+ *
+ * Returns: the name of this kmod module section on success or NULL on
+ * failure. The string is owned by the section, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_section_get_name(const struct kmod_list *entry)
+{
+	struct kmod_module_section *section;
+
+	if (entry == NULL)
+		return NULL;
+
+	section = entry->data;
+	return section->name;
+}
+
+/**
+ * kmod_module_section_get_address:
+ * @entry: a list entry representing a kmod module section
+ *
+ * Get the address of a kmod module section.
+ *
+ * After use, free the @list by calling kmod_module_section_free_list().
+ *
+ * Returns: the address of this kmod module section on success or ULONG_MAX
+ * on failure.
+ */
+KMOD_EXPORT unsigned long kmod_module_section_get_address(const struct kmod_list *entry)
+{
+	struct kmod_module_section *section;
+
+	if (entry == NULL)
+		return (unsigned long)-1;
+
+	section = entry->data;
+	return section->address;
+}
+
+/**
+ * kmod_module_section_free_list:
+ * @list: kmod module section list
+ *
+ * Release the resources taken by @list
+ */
+KMOD_EXPORT void kmod_module_section_free_list(struct kmod_list *list)
+{
+	while (list) {
+		kmod_module_section_free(list->data);
+		list = kmod_list_remove(list);
+	}
+}
+
+static struct kmod_elf *kmod_module_get_elf(const struct kmod_module *mod)
+{
+	if (mod->file == NULL) {
+		const char *path = kmod_module_get_path(mod);
+
+		if (path == NULL) {
+			errno = ENOENT;
+			return NULL;
+		}
+
+		((struct kmod_module *)mod)->file = kmod_file_open(mod->ctx,
+									path);
+		if (mod->file == NULL)
+			return NULL;
+	}
+
+	return kmod_file_get_elf(mod->file);
+}
+
+struct kmod_module_info {
+	char *key;
+	char value[];
+};
+
+static struct kmod_module_info *kmod_module_info_new(const char *key, size_t keylen, const char *value, size_t valuelen)
+{
+	struct kmod_module_info *info;
+
+	info = malloc(sizeof(struct kmod_module_info) + keylen + valuelen + 2);
+	if (info == NULL)
+		return NULL;
+
+	info->key = (char *)info + sizeof(struct kmod_module_info)
+		    + valuelen + 1;
+	memcpy(info->key, key, keylen);
+	info->key[keylen] = '\0';
+	memcpy(info->value, value, valuelen);
+	info->value[valuelen] = '\0';
+	return info;
+}
+
+static void kmod_module_info_free(struct kmod_module_info *info)
+{
+	free(info);
+}
+
+static struct kmod_list *kmod_module_info_append(struct kmod_list **list, const char *key, size_t keylen, const char *value, size_t valuelen)
+{
+	struct kmod_module_info *info;
+	struct kmod_list *n;
+
+	info = kmod_module_info_new(key, keylen, value, valuelen);
+	if (info == NULL)
+		return NULL;
+	n = kmod_list_append(*list, info);
+	if (n != NULL)
+		*list = n;
+	else
+		kmod_module_info_free(info);
+	return n;
+}
+
+static char *kmod_module_hex_to_str(const char *hex, size_t len)
+{
+	char *str;
+	int i;
+	int j;
+	const size_t line_limit = 20;
+	size_t str_len;
+
+	str_len = len * 3; /* XX: or XX\0 */
+	str_len += ((str_len + line_limit - 1) / line_limit - 1) * 3; /* \n\t\t */
+
+	str = malloc(str_len);
+	if (str == NULL)
+		return NULL;
+
+	for (i = 0, j = 0; i < (int)len; i++) {
+		j += sprintf(str + j, "%02X", (unsigned char)hex[i]);
+		if (i < (int)len - 1) {
+			str[j++] = ':';
+
+			if ((i + 1) % line_limit == 0)
+				j += sprintf(str + j, "\n\t\t");
+		}
+	}
+	return str;
+}
+
+static struct kmod_list *kmod_module_info_append_hex(struct kmod_list **list,
+						     const char *key,
+						     size_t keylen,
+						     const char *value,
+						     size_t valuelen)
+{
+	char *hex;
+	struct kmod_list *n;
+
+	if (valuelen > 0) {
+		/* Display as 01:12:DE:AD:BE:EF:... */
+		hex = kmod_module_hex_to_str(value, valuelen);
+		if (hex == NULL)
+			goto list_error;
+		n = kmod_module_info_append(list, key, keylen, hex, strlen(hex));
+		free(hex);
+		if (n == NULL)
+			goto list_error;
+	} else {
+		n = kmod_module_info_append(list, key, keylen, NULL, 0);
+		if (n == NULL)
+			goto list_error;
+	}
+
+	return n;
+
+list_error:
+	return NULL;
+}
+
+/**
+ * kmod_module_get_info:
+ * @mod: kmod module
+ * @list: where to return list of module information. Use
+ *        kmod_module_info_get_key() and
+ *        kmod_module_info_get_value(). Release this list with
+ *        kmod_module_info_free_list()
+ *
+ * Get a list of entries in ELF section ".modinfo", these contain
+ * alias, license, depends, vermagic and other keys with respective
+ * values. If the module is signed (CONFIG_MODULE_SIG), information
+ * about the module signature is included as well: signer,
+ * sig_key and sig_hashalgo.
+ *
+ * After use, free the @list by calling kmod_module_info_free_list().
+ *
+ * Returns: number of entries in @list on success or < 0 otherwise.
+ */
+KMOD_EXPORT int kmod_module_get_info(const struct kmod_module *mod, struct kmod_list **list)
+{
+	struct kmod_elf *elf;
+	char **strings;
+	int i, count, ret = -ENOMEM;
+	struct kmod_signature_info sig_info = {};
+
+	if (mod == NULL || list == NULL)
+		return -ENOENT;
+
+	assert(*list == NULL);
+
+	/* remove const: this can only change internal state */
+	if (kmod_module_is_builtin((struct kmod_module *)mod)) {
+		count = kmod_builtin_get_modinfo(mod->ctx,
+						kmod_module_get_name(mod),
+						&strings);
+		if (count < 0)
+			return count;
+	} else {
+		elf = kmod_module_get_elf(mod);
+		if (elf == NULL)
+			return -errno;
+
+		count = kmod_elf_get_strings(elf, ".modinfo", &strings);
+		if (count < 0)
+			return count;
+	}
+
+	for (i = 0; i < count; i++) {
+		struct kmod_list *n;
+		const char *key, *value;
+		size_t keylen, valuelen;
+
+		key = strings[i];
+		value = strchr(key, '=');
+		if (value == NULL) {
+			keylen = strlen(key);
+			valuelen = 0;
+			value = key;
+		} else {
+			keylen = value - key;
+			value++;
+			valuelen = strlen(value);
+		}
+
+		n = kmod_module_info_append(list, key, keylen, value, valuelen);
+		if (n == NULL)
+			goto list_error;
+	}
+
+	if (mod->file && kmod_module_signature_info(mod->file, &sig_info)) {
+		struct kmod_list *n;
+
+		n = kmod_module_info_append(list, "sig_id", strlen("sig_id"),
+				sig_info.id_type, strlen(sig_info.id_type));
+		if (n == NULL)
+			goto list_error;
+		count++;
+
+		n = kmod_module_info_append(list, "signer", strlen("signer"),
+				sig_info.signer, sig_info.signer_len);
+		if (n == NULL)
+			goto list_error;
+		count++;
+
+
+		n = kmod_module_info_append_hex(list, "sig_key", strlen("sig_key"),
+						sig_info.key_id,
+						sig_info.key_id_len);
+		if (n == NULL)
+			goto list_error;
+		count++;
+
+		n = kmod_module_info_append(list,
+				"sig_hashalgo", strlen("sig_hashalgo"),
+				sig_info.hash_algo, strlen(sig_info.hash_algo));
+		if (n == NULL)
+			goto list_error;
+		count++;
+
+		/*
+		 * Omit sig_info.algo for now, as these
+		 * are currently constant.
+		 */
+		n = kmod_module_info_append_hex(list, "signature",
+						strlen("signature"),
+						sig_info.sig,
+						sig_info.sig_len);
+
+		if (n == NULL)
+			goto list_error;
+		count++;
+
+	}
+	ret = count;
+
+list_error:
+	/* aux structures freed in normal case also */
+	kmod_module_signature_info_free(&sig_info);
+
+	if (ret < 0) {
+		kmod_module_info_free_list(*list);
+		*list = NULL;
+	}
+	free(strings);
+	return ret;
+}
+
+/**
+ * kmod_module_info_get_key:
+ * @entry: a list entry representing a kmod module info
+ *
+ * Get the key of a kmod module info.
+ *
+ * Returns: the key of this kmod module info on success or NULL on
+ * failure. The string is owned by the info, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_info_get_key(const struct kmod_list *entry)
+{
+	struct kmod_module_info *info;
+
+	if (entry == NULL)
+		return NULL;
+
+	info = entry->data;
+	return info->key;
+}
+
+/**
+ * kmod_module_info_get_value:
+ * @entry: a list entry representing a kmod module info
+ *
+ * Get the value of a kmod module info.
+ *
+ * Returns: the value of this kmod module info on success or NULL on
+ * failure. The string is owned by the info, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_info_get_value(const struct kmod_list *entry)
+{
+	struct kmod_module_info *info;
+
+	if (entry == NULL)
+		return NULL;
+
+	info = entry->data;
+	return info->value;
+}
+
+/**
+ * kmod_module_info_free_list:
+ * @list: kmod module info list
+ *
+ * Release the resources taken by @list
+ */
+KMOD_EXPORT void kmod_module_info_free_list(struct kmod_list *list)
+{
+	while (list) {
+		kmod_module_info_free(list->data);
+		list = kmod_list_remove(list);
+	}
+}
+
+struct kmod_module_version {
+	uint64_t crc;
+	char symbol[];
+};
+
+static struct kmod_module_version *kmod_module_versions_new(uint64_t crc, const char *symbol)
+{
+	struct kmod_module_version *mv;
+	size_t symbollen = strlen(symbol) + 1;
+
+	mv = malloc(sizeof(struct kmod_module_version) + symbollen);
+	if (mv == NULL)
+		return NULL;
+
+	mv->crc = crc;
+	memcpy(mv->symbol, symbol, symbollen);
+	return mv;
+}
+
+static void kmod_module_version_free(struct kmod_module_version *version)
+{
+	free(version);
+}
+
+/**
+ * kmod_module_get_versions:
+ * @mod: kmod module
+ * @list: where to return list of module versions. Use
+ *        kmod_module_version_get_symbol() and
+ *        kmod_module_version_get_crc(). Release this list with
+ *        kmod_module_versions_free_list()
+ *
+ * Get a list of entries in ELF section "__versions".
+ *
+ * After use, free the @list by calling kmod_module_versions_free_list().
+ *
+ * Returns: 0 on success or < 0 otherwise.
+ */
+KMOD_EXPORT int kmod_module_get_versions(const struct kmod_module *mod, struct kmod_list **list)
+{
+	struct kmod_elf *elf;
+	struct kmod_modversion *versions;
+	int i, count, ret = 0;
+
+	if (mod == NULL || list == NULL)
+		return -ENOENT;
+
+	assert(*list == NULL);
+
+	elf = kmod_module_get_elf(mod);
+	if (elf == NULL)
+		return -errno;
+
+	count = kmod_elf_get_modversions(elf, &versions);
+	if (count < 0)
+		return count;
+
+	for (i = 0; i < count; i++) {
+		struct kmod_module_version *mv;
+		struct kmod_list *n;
+
+		mv = kmod_module_versions_new(versions[i].crc, versions[i].symbol);
+		if (mv == NULL) {
+			ret = -errno;
+			kmod_module_versions_free_list(*list);
+			*list = NULL;
+			goto list_error;
+		}
+
+		n = kmod_list_append(*list, mv);
+		if (n != NULL)
+			*list = n;
+		else {
+			kmod_module_version_free(mv);
+			kmod_module_versions_free_list(*list);
+			*list = NULL;
+			ret = -ENOMEM;
+			goto list_error;
+		}
+	}
+	ret = count;
+
+list_error:
+	free(versions);
+	return ret;
+}
+
+/**
+ * kmod_module_version_get_symbol:
+ * @entry: a list entry representing a kmod module versions
+ *
+ * Get the symbol of a kmod module versions.
+ *
+ * Returns: the symbol of this kmod module versions on success or NULL
+ * on failure. The string is owned by the versions, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_version_get_symbol(const struct kmod_list *entry)
+{
+	struct kmod_module_version *version;
+
+	if (entry == NULL || entry->data == NULL)
+		return NULL;
+
+	version = entry->data;
+	return version->symbol;
+}
+
+/**
+ * kmod_module_version_get_crc:
+ * @entry: a list entry representing a kmod module version
+ *
+ * Get the crc of a kmod module version.
+ *
+ * Returns: the crc of this kmod module version if available, otherwise default to 0.
+ */
+KMOD_EXPORT uint64_t kmod_module_version_get_crc(const struct kmod_list *entry)
+{
+	struct kmod_module_version *version;
+
+	if (entry == NULL || entry->data == NULL)
+		return 0;
+
+	version = entry->data;
+	return version->crc;
+}
+
+/**
+ * kmod_module_versions_free_list:
+ * @list: kmod module versions list
+ *
+ * Release the resources taken by @list
+ */
+KMOD_EXPORT void kmod_module_versions_free_list(struct kmod_list *list)
+{
+	while (list) {
+		kmod_module_version_free(list->data);
+		list = kmod_list_remove(list);
+	}
+}
+
+struct kmod_module_symbol {
+	uint64_t crc;
+	char symbol[];
+};
+
+static struct kmod_module_symbol *kmod_module_symbols_new(uint64_t crc, const char *symbol)
+{
+	struct kmod_module_symbol *mv;
+	size_t symbollen = strlen(symbol) + 1;
+
+	mv = malloc(sizeof(struct kmod_module_symbol) + symbollen);
+	if (mv == NULL)
+		return NULL;
+
+	mv->crc = crc;
+	memcpy(mv->symbol, symbol, symbollen);
+	return mv;
+}
+
+static void kmod_module_symbol_free(struct kmod_module_symbol *symbol)
+{
+	free(symbol);
+}
+
+/**
+ * kmod_module_get_symbols:
+ * @mod: kmod module
+ * @list: where to return list of module symbols. Use
+ *        kmod_module_symbol_get_symbol() and
+ *        kmod_module_symbol_get_crc(). Release this list with
+ *        kmod_module_symbols_free_list()
+ *
+ * Get a list of entries in ELF section ".symtab" or "__ksymtab_strings".
+ *
+ * After use, free the @list by calling kmod_module_symbols_free_list().
+ *
+ * Returns: 0 on success or < 0 otherwise.
+ */
+KMOD_EXPORT int kmod_module_get_symbols(const struct kmod_module *mod, struct kmod_list **list)
+{
+	struct kmod_elf *elf;
+	struct kmod_modversion *symbols;
+	int i, count, ret = 0;
+
+	if (mod == NULL || list == NULL)
+		return -ENOENT;
+
+	assert(*list == NULL);
+
+	elf = kmod_module_get_elf(mod);
+	if (elf == NULL)
+		return -errno;
+
+	count = kmod_elf_get_symbols(elf, &symbols);
+	if (count < 0)
+		return count;
+
+	for (i = 0; i < count; i++) {
+		struct kmod_module_symbol *mv;
+		struct kmod_list *n;
+
+		mv = kmod_module_symbols_new(symbols[i].crc, symbols[i].symbol);
+		if (mv == NULL) {
+			ret = -errno;
+			kmod_module_symbols_free_list(*list);
+			*list = NULL;
+			goto list_error;
+		}
+
+		n = kmod_list_append(*list, mv);
+		if (n != NULL)
+			*list = n;
+		else {
+			kmod_module_symbol_free(mv);
+			kmod_module_symbols_free_list(*list);
+			*list = NULL;
+			ret = -ENOMEM;
+			goto list_error;
+		}
+	}
+	ret = count;
+
+list_error:
+	free(symbols);
+	return ret;
+}
+
+/**
+ * kmod_module_symbol_get_symbol:
+ * @entry: a list entry representing a kmod module symbols
+ *
+ * Get the symbol of a kmod module symbols.
+ *
+ * Returns: the symbol of this kmod module symbols on success or NULL
+ * on failure. The string is owned by the symbols, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_symbol_get_symbol(const struct kmod_list *entry)
+{
+	struct kmod_module_symbol *symbol;
+
+	if (entry == NULL || entry->data == NULL)
+		return NULL;
+
+	symbol = entry->data;
+	return symbol->symbol;
+}
+
+/**
+ * kmod_module_symbol_get_crc:
+ * @entry: a list entry representing a kmod module symbol
+ *
+ * Get the crc of a kmod module symbol.
+ *
+ * Returns: the crc of this kmod module symbol if available, otherwise default to 0.
+ */
+KMOD_EXPORT uint64_t kmod_module_symbol_get_crc(const struct kmod_list *entry)
+{
+	struct kmod_module_symbol *symbol;
+
+	if (entry == NULL || entry->data == NULL)
+		return 0;
+
+	symbol = entry->data;
+	return symbol->crc;
+}
+
+/**
+ * kmod_module_symbols_free_list:
+ * @list: kmod module symbols list
+ *
+ * Release the resources taken by @list
+ */
+KMOD_EXPORT void kmod_module_symbols_free_list(struct kmod_list *list)
+{
+	while (list) {
+		kmod_module_symbol_free(list->data);
+		list = kmod_list_remove(list);
+	}
+}
+
+struct kmod_module_dependency_symbol {
+	uint64_t crc;
+	uint8_t bind;
+	char symbol[];
+};
+
+static struct kmod_module_dependency_symbol *kmod_module_dependency_symbols_new(uint64_t crc, uint8_t bind, const char *symbol)
+{
+	struct kmod_module_dependency_symbol *mv;
+	size_t symbollen = strlen(symbol) + 1;
+
+	mv = malloc(sizeof(struct kmod_module_dependency_symbol) + symbollen);
+	if (mv == NULL)
+		return NULL;
+
+	mv->crc = crc;
+	mv->bind = bind;
+	memcpy(mv->symbol, symbol, symbollen);
+	return mv;
+}
+
+static void kmod_module_dependency_symbol_free(struct kmod_module_dependency_symbol *dependency_symbol)
+{
+	free(dependency_symbol);
+}
+
+/**
+ * kmod_module_get_dependency_symbols:
+ * @mod: kmod module
+ * @list: where to return list of module dependency_symbols. Use
+ *        kmod_module_dependency_symbol_get_symbol() and
+ *        kmod_module_dependency_symbol_get_crc(). Release this list with
+ *        kmod_module_dependency_symbols_free_list()
+ *
+ * Get a list of entries in ELF section ".symtab" or "__ksymtab_strings".
+ *
+ * After use, free the @list by calling
+ * kmod_module_dependency_symbols_free_list().
+ *
+ * Returns: 0 on success or < 0 otherwise.
+ */
+KMOD_EXPORT int kmod_module_get_dependency_symbols(const struct kmod_module *mod, struct kmod_list **list)
+{
+	struct kmod_elf *elf;
+	struct kmod_modversion *symbols;
+	int i, count, ret = 0;
+
+	if (mod == NULL || list == NULL)
+		return -ENOENT;
+
+	assert(*list == NULL);
+
+	elf = kmod_module_get_elf(mod);
+	if (elf == NULL)
+		return -errno;
+
+	count = kmod_elf_get_dependency_symbols(elf, &symbols);
+	if (count < 0)
+		return count;
+
+	for (i = 0; i < count; i++) {
+		struct kmod_module_dependency_symbol *mv;
+		struct kmod_list *n;
+
+		mv = kmod_module_dependency_symbols_new(symbols[i].crc,
+							symbols[i].bind,
+							symbols[i].symbol);
+		if (mv == NULL) {
+			ret = -errno;
+			kmod_module_dependency_symbols_free_list(*list);
+			*list = NULL;
+			goto list_error;
+		}
+
+		n = kmod_list_append(*list, mv);
+		if (n != NULL)
+			*list = n;
+		else {
+			kmod_module_dependency_symbol_free(mv);
+			kmod_module_dependency_symbols_free_list(*list);
+			*list = NULL;
+			ret = -ENOMEM;
+			goto list_error;
+		}
+	}
+	ret = count;
+
+list_error:
+	free(symbols);
+	return ret;
+}
+
+/**
+ * kmod_module_dependency_symbol_get_symbol:
+ * @entry: a list entry representing a kmod module dependency_symbols
+ *
+ * Get the dependency symbol of a kmod module
+ *
+ * Returns: the symbol of this kmod module dependency_symbols on success or NULL
+ * on failure. The string is owned by the dependency_symbols, do not free it.
+ */
+KMOD_EXPORT const char *kmod_module_dependency_symbol_get_symbol(const struct kmod_list *entry)
+{
+	struct kmod_module_dependency_symbol *dependency_symbol;
+
+	if (entry == NULL || entry->data == NULL)
+		return NULL;
+
+	dependency_symbol = entry->data;
+	return dependency_symbol->symbol;
+}
+
+/**
+ * kmod_module_dependency_symbol_get_crc:
+ * @entry: a list entry representing a kmod module dependency_symbol
+ *
+ * Get the crc of a kmod module dependency_symbol.
+ *
+ * Returns: the crc of this kmod module dependency_symbol if available, otherwise default to 0.
+ */
+KMOD_EXPORT uint64_t kmod_module_dependency_symbol_get_crc(const struct kmod_list *entry)
+{
+	struct kmod_module_dependency_symbol *dependency_symbol;
+
+	if (entry == NULL || entry->data == NULL)
+		return 0;
+
+	dependency_symbol = entry->data;
+	return dependency_symbol->crc;
+}
+
+/**
+ * kmod_module_dependency_symbol_get_bind:
+ * @entry: a list entry representing a kmod module dependency_symbol
+ *
+ * Get the bind type of a kmod module dependency_symbol.
+ *
+ * Returns: the bind of this kmod module dependency_symbol on success
+ * or < 0 on failure.
+ */
+KMOD_EXPORT int kmod_module_dependency_symbol_get_bind(const struct kmod_list *entry)
+{
+	struct kmod_module_dependency_symbol *dependency_symbol;
+
+	if (entry == NULL || entry->data == NULL)
+		return 0;
+
+	dependency_symbol = entry->data;
+	return dependency_symbol->bind;
+}
+
+/**
+ * kmod_module_dependency_symbols_free_list:
+ * @list: kmod module dependency_symbols list
+ *
+ * Release the resources taken by @list
+ */
+KMOD_EXPORT void kmod_module_dependency_symbols_free_list(struct kmod_list *list)
+{
+	while (list) {
+		kmod_module_dependency_symbol_free(list->data);
+		list = kmod_list_remove(list);
+	}
+}
diff --git a/libkmod/libkmod-signature.c b/libkmod/libkmod-signature.c
new file mode 100644
index 0000000..80f6447
--- /dev/null
+++ b/libkmod/libkmod-signature.c
@@ -0,0 +1,358 @@
+/*
+ * libkmod - module signature display
+ *
+ * Copyright (C) 2013 Michal Marek, SUSE
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <endian.h>
+#include <inttypes.h>
+#ifdef ENABLE_OPENSSL
+#include <openssl/pkcs7.h>
+#include <openssl/ssl.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <shared/missing.h>
+#include <shared/util.h>
+
+#include "libkmod-internal.h"
+
+/* These types and tables were copied from the 3.7 kernel sources.
+ * As this is just description of the signature format, it should not be
+ * considered derived work (so libkmod can use the LGPL license).
+ */
+enum pkey_algo {
+	PKEY_ALGO_DSA,
+	PKEY_ALGO_RSA,
+	PKEY_ALGO__LAST
+};
+
+static const char *const pkey_algo[PKEY_ALGO__LAST] = {
+	[PKEY_ALGO_DSA]		= "DSA",
+	[PKEY_ALGO_RSA]		= "RSA",
+};
+
+enum pkey_hash_algo {
+	PKEY_HASH_MD4,
+	PKEY_HASH_MD5,
+	PKEY_HASH_SHA1,
+	PKEY_HASH_RIPE_MD_160,
+	PKEY_HASH_SHA256,
+	PKEY_HASH_SHA384,
+	PKEY_HASH_SHA512,
+	PKEY_HASH_SHA224,
+	PKEY_HASH_SM3,
+	PKEY_HASH__LAST
+};
+
+const char *const pkey_hash_algo[PKEY_HASH__LAST] = {
+	[PKEY_HASH_MD4]		= "md4",
+	[PKEY_HASH_MD5]		= "md5",
+	[PKEY_HASH_SHA1]	= "sha1",
+	[PKEY_HASH_RIPE_MD_160]	= "rmd160",
+	[PKEY_HASH_SHA256]	= "sha256",
+	[PKEY_HASH_SHA384]	= "sha384",
+	[PKEY_HASH_SHA512]	= "sha512",
+	[PKEY_HASH_SHA224]	= "sha224",
+	[PKEY_HASH_SM3]		= "sm3",
+};
+
+enum pkey_id_type {
+	PKEY_ID_PGP,		/* OpenPGP generated key ID */
+	PKEY_ID_X509,		/* X.509 arbitrary subjectKeyIdentifier */
+	PKEY_ID_PKCS7,		/* Signature in PKCS#7 message */
+	PKEY_ID_TYPE__LAST
+};
+
+const char *const pkey_id_type[PKEY_ID_TYPE__LAST] = {
+	[PKEY_ID_PGP]		= "PGP",
+	[PKEY_ID_X509]		= "X509",
+	[PKEY_ID_PKCS7]		= "PKCS#7",
+};
+
+/*
+ * Module signature information block.
+ */
+struct module_signature {
+	uint8_t algo;        /* Public-key crypto algorithm [enum pkey_algo] */
+	uint8_t hash;        /* Digest algorithm [enum pkey_hash_algo] */
+	uint8_t id_type;     /* Key identifier type [enum pkey_id_type] */
+	uint8_t signer_len;  /* Length of signer's name */
+	uint8_t key_id_len;  /* Length of key identifier */
+	uint8_t __pad[3];
+	uint32_t sig_len;    /* Length of signature data (big endian) */
+};
+
+static bool fill_default(const char *mem, off_t size,
+			 const struct module_signature *modsig, size_t sig_len,
+			 struct kmod_signature_info *sig_info)
+{
+	size -= sig_len;
+	sig_info->sig = mem + size;
+	sig_info->sig_len = sig_len;
+
+	size -= modsig->key_id_len;
+	sig_info->key_id = mem + size;
+	sig_info->key_id_len = modsig->key_id_len;
+
+	size -= modsig->signer_len;
+	sig_info->signer = mem + size;
+	sig_info->signer_len = modsig->signer_len;
+
+	sig_info->algo = pkey_algo[modsig->algo];
+	sig_info->hash_algo = pkey_hash_algo[modsig->hash];
+	sig_info->id_type = pkey_id_type[modsig->id_type];
+
+	return true;
+}
+
+#ifdef ENABLE_OPENSSL
+
+struct pkcs7_private {
+	PKCS7 *pkcs7;
+	unsigned char *key_id;
+	BIGNUM *sno;
+	char *hash_algo;
+};
+
+static void pkcs7_free(void *s)
+{
+	struct kmod_signature_info *si = s;
+	struct pkcs7_private *pvt = si->private;
+
+	PKCS7_free(pvt->pkcs7);
+	BN_free(pvt->sno);
+	free(pvt->key_id);
+	free(pvt->hash_algo);
+	free(pvt);
+	si->private = NULL;
+}
+
+static const char *x509_name_to_str(X509_NAME *name)
+{
+	int i;
+	X509_NAME_ENTRY *e;
+	ASN1_STRING *d;
+	ASN1_OBJECT *o;
+	int nid = -1;
+	const char *str;
+
+	for (i = 0; i < X509_NAME_entry_count(name); i++) {
+		e = X509_NAME_get_entry(name, i);
+		o = X509_NAME_ENTRY_get_object(e);
+		nid = OBJ_obj2nid(o);
+		if (nid == NID_commonName)
+			break;
+	}
+	if (nid == -1)
+		return NULL;
+
+	d = X509_NAME_ENTRY_get_data(e);
+	str = (const char *)ASN1_STRING_get0_data(d);
+
+	return str;
+}
+
+static bool fill_pkcs7(const char *mem, off_t size,
+		       const struct module_signature *modsig, size_t sig_len,
+		       struct kmod_signature_info *sig_info)
+{
+	const char *pkcs7_raw;
+	PKCS7 *pkcs7;
+	STACK_OF(PKCS7_SIGNER_INFO) *sis;
+	PKCS7_SIGNER_INFO *si;
+	PKCS7_ISSUER_AND_SERIAL *is;
+	X509_NAME *issuer;
+	ASN1_INTEGER *sno;
+	ASN1_OCTET_STRING *sig;
+	BIGNUM *sno_bn;
+	X509_ALGOR *dig_alg;
+	X509_ALGOR *sig_alg;
+	const ASN1_OBJECT *o;
+	BIO *in;
+	int len;
+	unsigned char *key_id_str;
+	struct pkcs7_private *pvt;
+	const char *issuer_str;
+	char *hash_algo;
+	int hash_algo_len;
+
+	size -= sig_len;
+	pkcs7_raw = mem + size;
+
+	in = BIO_new_mem_buf(pkcs7_raw, sig_len);
+
+	pkcs7 = d2i_PKCS7_bio(in, NULL);
+	if (pkcs7 == NULL) {
+		BIO_free(in);
+		return false;
+	}
+
+	BIO_free(in);
+
+	sis = PKCS7_get_signer_info(pkcs7);
+	if (sis == NULL)
+		goto err;
+
+	si = sk_PKCS7_SIGNER_INFO_value(sis, 0);
+	if (si == NULL)
+		goto err;
+
+	is = si->issuer_and_serial;
+	if (is == NULL)
+		goto err;
+	issuer = is->issuer;
+	sno = is->serial;
+
+	sig = si->enc_digest;
+	if (sig == NULL)
+		goto err;
+
+	PKCS7_SIGNER_INFO_get0_algs(si, NULL, &dig_alg, &sig_alg);
+
+	sig_info->sig = (const char *)ASN1_STRING_get0_data(sig);
+	sig_info->sig_len = ASN1_STRING_length(sig);
+
+	sno_bn = ASN1_INTEGER_to_BN(sno, NULL);
+	if (sno_bn == NULL)
+		goto err;
+
+	len = BN_num_bytes(sno_bn);
+	key_id_str = malloc(len);
+	if (key_id_str == NULL)
+		goto err2;
+	BN_bn2bin(sno_bn, key_id_str);
+
+	sig_info->key_id = (const char *)key_id_str;
+	sig_info->key_id_len = len;
+
+	issuer_str = x509_name_to_str(issuer);
+	if (issuer_str != NULL) {
+		sig_info->signer = issuer_str;
+		sig_info->signer_len = strlen(issuer_str);
+	}
+
+	X509_ALGOR_get0(&o, NULL, NULL, dig_alg);
+
+	// Use OBJ_obj2txt to calculate string length
+	hash_algo_len = OBJ_obj2txt(NULL, 0, o, 0);
+	if (hash_algo_len < 0)
+		goto err3;
+	hash_algo = malloc(hash_algo_len + 1);
+	if (hash_algo == NULL)
+		goto err3;
+	hash_algo_len = OBJ_obj2txt(hash_algo, hash_algo_len + 1, o, 0);
+	if (hash_algo_len < 0)
+		goto err4;
+
+	// Assign libcrypto hash algo string or number
+	sig_info->hash_algo = hash_algo;
+
+	sig_info->id_type = pkey_id_type[modsig->id_type];
+
+	pvt = malloc(sizeof(*pvt));
+	if (pvt == NULL)
+		goto err4;
+
+	pvt->pkcs7 = pkcs7;
+	pvt->key_id = key_id_str;
+	pvt->sno = sno_bn;
+	pvt->hash_algo = hash_algo;
+	sig_info->private = pvt;
+
+	sig_info->free = pkcs7_free;
+
+	return true;
+err4:
+	free(hash_algo);
+err3:
+	free(key_id_str);
+err2:
+	BN_free(sno_bn);
+err:
+	PKCS7_free(pkcs7);
+	return false;
+}
+
+#else /* ENABLE OPENSSL */
+
+static bool fill_pkcs7(const char *mem, off_t size,
+		       const struct module_signature *modsig, size_t sig_len,
+		       struct kmod_signature_info *sig_info)
+{
+	sig_info->hash_algo = "unknown";
+	sig_info->id_type = pkey_id_type[modsig->id_type];
+	return true;
+}
+
+#endif /* ENABLE OPENSSL */
+
+#define SIG_MAGIC "~Module signature appended~\n"
+
+/*
+ * A signed module has the following layout:
+ *
+ * [ module                  ]
+ * [ signer's name           ]
+ * [ key identifier          ]
+ * [ signature data          ]
+ * [ struct module_signature ]
+ * [ SIG_MAGIC               ]
+ */
+
+bool kmod_module_signature_info(const struct kmod_file *file, struct kmod_signature_info *sig_info)
+{
+	const char *mem;
+	off_t size;
+	const struct module_signature *modsig;
+	size_t sig_len;
+
+	size = kmod_file_get_size(file);
+	mem = kmod_file_get_contents(file);
+	if (size < (off_t)strlen(SIG_MAGIC))
+		return false;
+	size -= strlen(SIG_MAGIC);
+	if (memcmp(SIG_MAGIC, mem + size, strlen(SIG_MAGIC)) != 0)
+		return false;
+
+	if (size < (off_t)sizeof(struct module_signature))
+		return false;
+	size -= sizeof(struct module_signature);
+	modsig = (struct module_signature *)(mem + size);
+	if (modsig->algo >= PKEY_ALGO__LAST ||
+			modsig->hash >= PKEY_HASH__LAST ||
+			modsig->id_type >= PKEY_ID_TYPE__LAST)
+		return false;
+	sig_len = be32toh(get_unaligned(&modsig->sig_len));
+	if (sig_len == 0 ||
+	    size < (int64_t)(modsig->signer_len + modsig->key_id_len + sig_len))
+		return false;
+
+	switch (modsig->id_type) {
+	case PKEY_ID_PKCS7:
+		return fill_pkcs7(mem, size, modsig, sig_len, sig_info);
+	default:
+		return fill_default(mem, size, modsig, sig_len, sig_info);
+	}
+}
+
+void kmod_module_signature_info_free(struct kmod_signature_info *sig_info)
+{
+	if (sig_info->free)
+		sig_info->free(sig_info);
+}
diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
new file mode 100644
index 0000000..213b424
--- /dev/null
+++ b/libkmod/libkmod.c
@@ -0,0 +1,1024 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fnmatch.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/utsname.h>
+
+#include <shared/hash.h>
+#include <shared/util.h>
+
+#include "libkmod.h"
+#include "libkmod-internal.h"
+#include "libkmod-index.h"
+
+#define KMOD_HASH_SIZE (256)
+#define KMOD_LRU_MAX (128)
+#define _KMOD_INDEX_MODULES_SIZE KMOD_INDEX_MODULES_BUILTIN + 1
+
+/**
+ * SECTION:libkmod
+ * @short_description: libkmod context
+ *
+ * The context contains the default values for the library user,
+ * and is passed to all library operations.
+ */
+
+static const struct {
+	const char *fn;
+	const char *prefix;
+} index_files[] = {
+	[KMOD_INDEX_MODULES_DEP] = { .fn = "modules.dep", .prefix = "" },
+	[KMOD_INDEX_MODULES_ALIAS] = { .fn = "modules.alias", .prefix = "alias " },
+	[KMOD_INDEX_MODULES_SYMBOL] = { .fn = "modules.symbols", .prefix = "alias "},
+	[KMOD_INDEX_MODULES_BUILTIN_ALIAS] = { .fn = "modules.builtin.alias", .prefix = "" },
+	[KMOD_INDEX_MODULES_BUILTIN] = { .fn = "modules.builtin", .prefix = ""},
+};
+
+static const char *const default_config_paths[] = {
+	SYSCONFDIR "/modprobe.d",
+	"/run/modprobe.d",
+	"/usr/local/lib/modprobe.d",
+	DISTCONFDIR "/modprobe.d",
+	"/lib/modprobe.d",
+	NULL
+};
+
+/**
+ * kmod_ctx:
+ *
+ * Opaque object representing the library context.
+ */
+struct kmod_ctx {
+	int refcount;
+	int log_priority;
+	void (*log_fn)(void *data,
+			int priority, const char *file, int line,
+			const char *fn, const char *format, va_list args);
+	void *log_data;
+	const void *userdata;
+	char *dirname;
+	enum kmod_file_compression_type kernel_compression;
+	struct kmod_config *config;
+	struct hash *modules_by_name;
+	struct index_mm *indexes[_KMOD_INDEX_MODULES_SIZE];
+	unsigned long long indexes_stamp[_KMOD_INDEX_MODULES_SIZE];
+};
+
+void kmod_log(const struct kmod_ctx *ctx,
+		int priority, const char *file, int line, const char *fn,
+		const char *format, ...)
+{
+	va_list args;
+
+	if (ctx->log_fn == NULL)
+		return;
+
+	va_start(args, format);
+	ctx->log_fn(ctx->log_data, priority, file, line, fn, format, args);
+	va_end(args);
+}
+
+_printf_format_(6, 0)
+static void log_filep(void *data,
+			int priority, const char *file, int line,
+			const char *fn, const char *format, va_list args)
+{
+	FILE *fp = data;
+#ifdef ENABLE_DEBUG
+	char buf[16];
+	const char *priname;
+	switch (priority) {
+	case LOG_EMERG:
+		priname = "EMERGENCY";
+		break;
+	case LOG_ALERT:
+		priname = "ALERT";
+		break;
+	case LOG_CRIT:
+		priname = "CRITICAL";
+		break;
+	case LOG_ERR:
+		priname = "ERROR";
+		break;
+	case LOG_WARNING:
+		priname = "WARNING";
+		break;
+	case LOG_NOTICE:
+		priname = "NOTICE";
+		break;
+	case LOG_INFO:
+		priname = "INFO";
+		break;
+	case LOG_DEBUG:
+		priname = "DEBUG";
+		break;
+	default:
+		snprintf(buf, sizeof(buf), "L:%d", priority);
+		priname = buf;
+	}
+	fprintf(fp, "libkmod: %s %s:%d %s: ", priname, file, line, fn);
+#else
+	fprintf(fp, "libkmod: %s: ", fn);
+#endif
+	vfprintf(fp, format, args);
+}
+
+
+/**
+ * kmod_get_dirname:
+ * @ctx: kmod library context
+ *
+ * Retrieve the absolute path used for linux modules in this context. The path
+ * is computed from the arguments to kmod_new().
+ */
+KMOD_EXPORT const char *kmod_get_dirname(const struct kmod_ctx *ctx)
+{
+	return ctx->dirname;
+}
+
+/**
+ * kmod_get_userdata:
+ * @ctx: kmod library context
+ *
+ * Retrieve stored data pointer from library context. This might be useful
+ * to access from callbacks.
+ *
+ * Returns: stored userdata
+ */
+KMOD_EXPORT void *kmod_get_userdata(const struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;
+	return (void *)ctx->userdata;
+}
+
+/**
+ * kmod_set_userdata:
+ * @ctx: kmod library context
+ * @userdata: data pointer
+ *
+ * Store custom @userdata in the library context.
+ */
+KMOD_EXPORT void kmod_set_userdata(struct kmod_ctx *ctx, const void *userdata)
+{
+	if (ctx == NULL)
+		return;
+	ctx->userdata = userdata;
+}
+
+static int log_priority(const char *priority)
+{
+	char *endptr;
+	int prio;
+
+	prio = strtol(priority, &endptr, 10);
+	if (endptr[0] == '\0' || isspace(endptr[0]))
+		return prio;
+	if (strncmp(priority, "err", 3) == 0)
+		return LOG_ERR;
+	if (strncmp(priority, "info", 4) == 0)
+		return LOG_INFO;
+	if (strncmp(priority, "debug", 5) == 0)
+		return LOG_DEBUG;
+	return 0;
+}
+
+static const char *dirname_default_prefix = MODULE_DIRECTORY;
+
+static char *get_kernel_release(const char *dirname)
+{
+	struct utsname u;
+	char *p;
+
+	if (dirname != NULL)
+		return path_make_absolute_cwd(dirname);
+
+	if (uname(&u) < 0)
+		return NULL;
+
+	if (asprintf(&p, "%s/%s", dirname_default_prefix, u.release) < 0)
+		return NULL;
+
+	return p;
+}
+
+static enum kmod_file_compression_type get_kernel_compression(struct kmod_ctx *ctx)
+{
+	const char *path = "/sys/module/compression";
+	char buf[16];
+	int fd;
+	int err;
+
+	fd = open(path, O_RDONLY|O_CLOEXEC);
+	if (fd < 0) {
+		/* Not having the file is not an error: kernel may be too old */
+		DBG(ctx, "could not open '%s' for reading: %m\n", path);
+		return KMOD_FILE_COMPRESSION_NONE;
+	}
+
+	err = read_str_safe(fd, buf, sizeof(buf));
+	close(fd);
+	if (err < 0) {
+		ERR(ctx, "could not read from '%s': %s\n",
+		    path, strerror(-err));
+		return KMOD_FILE_COMPRESSION_NONE;
+	}
+
+	if (streq(buf, "zstd\n"))
+		return KMOD_FILE_COMPRESSION_ZSTD;
+	else if (streq(buf, "xz\n"))
+		return KMOD_FILE_COMPRESSION_XZ;
+	else if (streq(buf, "gzip\n"))
+		return KMOD_FILE_COMPRESSION_ZLIB;
+
+	ERR(ctx, "unknown kernel compression %s", buf);
+
+	return KMOD_FILE_COMPRESSION_NONE;
+}
+
+/**
+ * kmod_new:
+ * @dirname: what to consider as linux module's directory, if NULL
+ *           defaults to $MODULE_DIRECTORY/`uname -r`. If it's relative,
+ *           it's treated as relative to the current working directory.
+ *           Otherwise, give an absolute dirname.
+ * @config_paths: ordered array of paths (directories or files) where
+ *                to load from user-defined configuration parameters such as
+ *                alias, blacklists, commands (install, remove). If NULL
+ *                defaults to /etc/modprobe.d, /run/modprobe.d,
+ *                /usr/local/lib/modprobe.d, DISTCONFDIR/modprobe.d, and
+ *                /lib/modprobe.d. Give an empty vector if configuration should
+ *                not be read. This array must be null terminated.
+ *
+ * Create kmod library context. This reads the kmod configuration
+ * and fills in the default values.
+ *
+ * The initial refcount is 1, and needs to be decremented to
+ * release the resources of the kmod library context.
+ *
+ * Returns: a new kmod library context
+ */
+KMOD_EXPORT struct kmod_ctx *kmod_new(const char *dirname,
+					const char * const *config_paths)
+{
+	const char *env;
+	struct kmod_ctx *ctx;
+	int err;
+
+	ctx = calloc(1, sizeof(struct kmod_ctx));
+	if (!ctx)
+		return NULL;
+
+	ctx->refcount = 1;
+	ctx->log_fn = log_filep;
+	ctx->log_data = stderr;
+	ctx->log_priority = LOG_ERR;
+
+	ctx->dirname = get_kernel_release(dirname);
+
+	/* environment overwrites config */
+	env = secure_getenv("KMOD_LOG");
+	if (env != NULL)
+		kmod_set_log_priority(ctx, log_priority(env));
+
+	ctx->kernel_compression = get_kernel_compression(ctx);
+
+	if (config_paths == NULL)
+		config_paths = default_config_paths;
+	err = kmod_config_new(ctx, &ctx->config, config_paths);
+	if (err < 0) {
+		ERR(ctx, "could not create config\n");
+		goto fail;
+	}
+
+	ctx->modules_by_name = hash_new(KMOD_HASH_SIZE, NULL);
+	if (ctx->modules_by_name == NULL) {
+		ERR(ctx, "could not create by-name hash\n");
+		goto fail;
+	}
+
+	INFO(ctx, "ctx %p created\n", ctx);
+	DBG(ctx, "log_priority=%d\n", ctx->log_priority);
+
+	return ctx;
+
+fail:
+	free(ctx->modules_by_name);
+	free(ctx->dirname);
+	free(ctx);
+	return NULL;
+}
+
+/**
+ * kmod_ref:
+ * @ctx: kmod library context
+ *
+ * Take a reference of the kmod library context.
+ *
+ * Returns: the passed kmod library context
+ */
+KMOD_EXPORT struct kmod_ctx *kmod_ref(struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;
+	ctx->refcount++;
+	return ctx;
+}
+
+/**
+ * kmod_unref:
+ * @ctx: kmod library context
+ *
+ * Drop a reference of the kmod library context. If the refcount
+ * reaches zero, the resources of the context will be released.
+ *
+ * Returns: the passed kmod library context or NULL if it's freed
+ */
+KMOD_EXPORT struct kmod_ctx *kmod_unref(struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return NULL;
+
+	if (--ctx->refcount > 0)
+		return ctx;
+
+	INFO(ctx, "context %p released\n", ctx);
+
+	kmod_unload_resources(ctx);
+	hash_free(ctx->modules_by_name);
+	free(ctx->dirname);
+	if (ctx->config)
+		kmod_config_free(ctx->config);
+
+	free(ctx);
+	return NULL;
+}
+
+/**
+ * kmod_set_log_fn:
+ * @ctx: kmod library context
+ * @log_fn: function to be called for logging messages
+ * @data: data to pass to log function
+ *
+ * The built-in logging writes to stderr. It can be
+ * overridden by a custom function, to plug log messages
+ * into the user's logging functionality.
+ */
+KMOD_EXPORT void kmod_set_log_fn(struct kmod_ctx *ctx,
+					void (*log_fn)(void *data,
+						int priority, const char *file,
+						int line, const char *fn,
+						const char *format, va_list args),
+					const void *data)
+{
+	if (ctx == NULL)
+		return;
+	ctx->log_fn = log_fn;
+	ctx->log_data = (void *)data;
+	INFO(ctx, "custom logging function %p registered\n", log_fn);
+}
+
+/**
+ * kmod_get_log_priority:
+ * @ctx: kmod library context
+ *
+ * Returns: the current logging priority
+ */
+KMOD_EXPORT int kmod_get_log_priority(const struct kmod_ctx *ctx)
+{
+	if (ctx == NULL)
+		return -1;
+	return ctx->log_priority;
+}
+
+/**
+ * kmod_set_log_priority:
+ * @ctx: kmod library context
+ * @priority: the new logging priority
+ *
+ * Set the current logging priority. The value controls which messages
+ * are logged.
+ */
+KMOD_EXPORT void kmod_set_log_priority(struct kmod_ctx *ctx, int priority)
+{
+	if (ctx == NULL)
+		return;
+	ctx->log_priority = priority;
+}
+
+struct kmod_module *kmod_pool_get_module(struct kmod_ctx *ctx,
+							const char *key)
+{
+	struct kmod_module *mod;
+
+	mod = hash_find(ctx->modules_by_name, key);
+
+	DBG(ctx, "get module name='%s' found=%p\n", key, mod);
+
+	return mod;
+}
+
+void kmod_pool_add_module(struct kmod_ctx *ctx, struct kmod_module *mod,
+							const char *key)
+{
+	DBG(ctx, "add %p key='%s'\n", mod, key);
+
+	hash_add(ctx->modules_by_name, key, mod);
+}
+
+void kmod_pool_del_module(struct kmod_ctx *ctx, struct kmod_module *mod,
+							const char *key)
+{
+	DBG(ctx, "del %p key='%s'\n", mod, key);
+
+	hash_del(ctx->modules_by_name, key);
+}
+
+static int kmod_lookup_alias_from_alias_bin(struct kmod_ctx *ctx,
+						enum kmod_index index_number,
+						const char *name,
+						struct kmod_list **list)
+{
+	int err, nmatch = 0;
+	struct index_file *idx;
+	struct index_value *realnames, *realname;
+
+	if (ctx->indexes[index_number] != NULL) {
+		DBG(ctx, "use mmaped index '%s' for name=%s\n",
+			index_files[index_number].fn, name);
+		realnames = index_mm_searchwild(ctx->indexes[index_number],
+									name);
+	} else {
+		char fn[PATH_MAX];
+
+		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,
+					index_files[index_number].fn);
+
+		DBG(ctx, "file=%s name=%s\n", fn, name);
+
+		idx = index_file_open(fn);
+		if (idx == NULL)
+			return -ENOSYS;
+
+		realnames = index_searchwild(idx, name);
+		index_file_close(idx);
+	}
+
+	for (realname = realnames; realname; realname = realname->next) {
+		struct kmod_module *mod;
+
+		err = kmod_module_new_from_alias(ctx, name, realname->value, &mod);
+		if (err < 0) {
+			ERR(ctx, "Could not create module for alias=%s realname=%s: %s\n",
+			    name, realname->value, strerror(-err));
+			goto fail;
+		}
+
+		*list = kmod_list_append(*list, mod);
+		nmatch++;
+	}
+
+	index_values_free(realnames);
+	return nmatch;
+
+fail:
+	*list = kmod_list_remove_n_latest(*list, nmatch);
+	index_values_free(realnames);
+	return err;
+
+}
+
+int kmod_lookup_alias_from_symbols_file(struct kmod_ctx *ctx, const char *name,
+						struct kmod_list **list)
+{
+	if (!strstartswith(name, "symbol:"))
+		return 0;
+
+	return kmod_lookup_alias_from_alias_bin(ctx, KMOD_INDEX_MODULES_SYMBOL,
+								name, list);
+}
+
+int kmod_lookup_alias_from_aliases_file(struct kmod_ctx *ctx, const char *name,
+						struct kmod_list **list)
+{
+	return kmod_lookup_alias_from_alias_bin(ctx, KMOD_INDEX_MODULES_ALIAS,
+								name, list);
+}
+
+static char *lookup_builtin_file(struct kmod_ctx *ctx, const char *name)
+{
+	char *line;
+
+	if (ctx->indexes[KMOD_INDEX_MODULES_BUILTIN]) {
+		DBG(ctx, "use mmaped index '%s' modname=%s\n",
+				index_files[KMOD_INDEX_MODULES_BUILTIN].fn,
+				name);
+		line = index_mm_search(ctx->indexes[KMOD_INDEX_MODULES_BUILTIN],
+									name);
+	} else {
+		struct index_file *idx;
+		char fn[PATH_MAX];
+
+		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,
+				index_files[KMOD_INDEX_MODULES_BUILTIN].fn);
+		DBG(ctx, "file=%s modname=%s\n", fn, name);
+
+		idx = index_file_open(fn);
+		if (idx == NULL) {
+			DBG(ctx, "could not open builtin file '%s'\n", fn);
+			return NULL;
+		}
+
+		line = index_search(idx, name);
+		index_file_close(idx);
+	}
+
+	return line;
+}
+
+int kmod_lookup_alias_from_kernel_builtin_file(struct kmod_ctx *ctx,
+						const char *name,
+						struct kmod_list **list)
+{
+	struct kmod_list *l;
+	int ret;
+
+	assert(*list == NULL);
+
+	ret = kmod_lookup_alias_from_alias_bin(ctx,
+					       KMOD_INDEX_MODULES_BUILTIN_ALIAS,
+					       name, list);
+
+	kmod_list_foreach(l, *list) {
+		struct kmod_module *mod = l->data;
+		kmod_module_set_builtin(mod, true);
+	}
+
+	return ret;
+}
+
+int kmod_lookup_alias_from_builtin_file(struct kmod_ctx *ctx, const char *name,
+						struct kmod_list **list)
+{
+	char *line;
+	int err = 0;
+
+	assert(*list == NULL);
+
+	line = lookup_builtin_file(ctx, name);
+	if (line != NULL) {
+		struct kmod_module *mod;
+
+		err = kmod_module_new_from_name(ctx, name, &mod);
+		if (err < 0) {
+			ERR(ctx, "Could not create module from name %s: %s\n",
+							name, strerror(-err));
+			goto finish;
+		}
+
+		/* already mark it as builtin since it's being created from
+		 * this index */
+		kmod_module_set_builtin(mod, true);
+		*list = kmod_list_append(*list, mod);
+		if (*list == NULL)
+			err = -ENOMEM;
+	}
+
+finish:
+	free(line);
+	return err;
+}
+
+bool kmod_lookup_alias_is_builtin(struct kmod_ctx *ctx, const char *name)
+{
+	_cleanup_free_ char *line;
+
+	line = lookup_builtin_file(ctx, name);
+
+	return line != NULL;
+}
+
+char *kmod_search_moddep(struct kmod_ctx *ctx, const char *name)
+{
+	struct index_file *idx;
+	char fn[PATH_MAX];
+	char *line;
+
+	if (ctx->indexes[KMOD_INDEX_MODULES_DEP]) {
+		DBG(ctx, "use mmaped index '%s' modname=%s\n",
+				index_files[KMOD_INDEX_MODULES_DEP].fn, name);
+		return index_mm_search(ctx->indexes[KMOD_INDEX_MODULES_DEP],
+									name);
+	}
+
+	snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,
+					index_files[KMOD_INDEX_MODULES_DEP].fn);
+
+	DBG(ctx, "file=%s modname=%s\n", fn, name);
+
+	idx = index_file_open(fn);
+	if (idx == NULL) {
+		DBG(ctx, "could not open moddep file '%s'\n", fn);
+		return NULL;
+	}
+
+	line = index_search(idx, name);
+	index_file_close(idx);
+
+	return line;
+}
+
+int kmod_lookup_alias_from_moddep_file(struct kmod_ctx *ctx, const char *name,
+						struct kmod_list **list)
+{
+	char *line;
+	int n = 0;
+
+	/*
+	 * Module names do not contain ':'. Return early if we know it will
+	 * not be found.
+	 */
+	if (strchr(name, ':'))
+		return 0;
+
+	line = kmod_search_moddep(ctx, name);
+	if (line != NULL) {
+		struct kmod_module *mod;
+
+		n = kmod_module_new_from_name(ctx, name, &mod);
+		if (n < 0) {
+			ERR(ctx, "Could not create module from name %s: %s\n",
+			    name, strerror(-n));
+			goto finish;
+		}
+
+		*list = kmod_list_append(*list, mod);
+		kmod_module_parse_depline(mod, line);
+	}
+
+finish:
+	free(line);
+
+	return n;
+}
+
+int kmod_lookup_alias_from_config(struct kmod_ctx *ctx, const char *name,
+						struct kmod_list **list)
+{
+	struct kmod_config *config = ctx->config;
+	struct kmod_list *l;
+	int err, nmatch = 0;
+
+	kmod_list_foreach(l, config->aliases) {
+		const char *aliasname = kmod_alias_get_name(l);
+		const char *modname = kmod_alias_get_modname(l);
+
+		if (fnmatch(aliasname, name, 0) == 0) {
+			struct kmod_module *mod;
+
+			err = kmod_module_new_from_alias(ctx, aliasname,
+								modname, &mod);
+			if (err < 0) {
+				ERR(ctx, "Could not create module for alias=%s modname=%s: %s\n",
+				    name, modname, strerror(-err));
+				goto fail;
+			}
+
+			*list = kmod_list_append(*list, mod);
+			nmatch++;
+		}
+	}
+
+	return nmatch;
+
+fail:
+	*list = kmod_list_remove_n_latest(*list, nmatch);
+	return err;
+}
+
+int kmod_lookup_alias_from_commands(struct kmod_ctx *ctx, const char *name,
+						struct kmod_list **list)
+{
+	struct kmod_config *config = ctx->config;
+	struct kmod_list *l, *node;
+	int err, nmatch = 0;
+
+	kmod_list_foreach(l, config->install_commands) {
+		const char *modname = kmod_command_get_modname(l);
+
+		if (streq(modname, name)) {
+			const char *cmd = kmod_command_get_command(l);
+			struct kmod_module *mod;
+
+			err = kmod_module_new_from_name(ctx, modname, &mod);
+			if (err < 0) {
+				ERR(ctx, "Could not create module from name %s: %s\n",
+				    modname, strerror(-err));
+				return err;
+			}
+
+			node = kmod_list_append(*list, mod);
+			if (node == NULL) {
+				ERR(ctx, "out of memory\n");
+				return -ENOMEM;
+			}
+
+			*list = node;
+			nmatch = 1;
+
+			kmod_module_set_install_commands(mod, cmd);
+
+			/*
+			 * match only the first one, like modprobe from
+			 * module-init-tools does
+			 */
+			break;
+		}
+	}
+
+	if (nmatch)
+		return nmatch;
+
+	kmod_list_foreach(l, config->remove_commands) {
+		const char *modname = kmod_command_get_modname(l);
+
+		if (streq(modname, name)) {
+			const char *cmd = kmod_command_get_command(l);
+			struct kmod_module *mod;
+
+			err = kmod_module_new_from_name(ctx, modname, &mod);
+			if (err < 0) {
+				ERR(ctx, "Could not create module from name %s: %s\n",
+				    modname, strerror(-err));
+				return err;
+			}
+
+			node = kmod_list_append(*list, mod);
+			if (node == NULL) {
+				ERR(ctx, "out of memory\n");
+				return -ENOMEM;
+			}
+
+			*list = node;
+			nmatch = 1;
+
+			kmod_module_set_remove_commands(mod, cmd);
+
+			/*
+			 * match only the first one, like modprobe from
+			 * module-init-tools does
+			 */
+			break;
+		}
+	}
+
+	return nmatch;
+}
+
+void kmod_set_modules_visited(struct kmod_ctx *ctx, bool visited)
+{
+	struct hash_iter iter;
+	const void *v;
+
+	hash_iter_init(ctx->modules_by_name, &iter);
+	while (hash_iter_next(&iter, NULL, &v))
+		kmod_module_set_visited((struct kmod_module *)v, visited);
+}
+
+void kmod_set_modules_required(struct kmod_ctx *ctx, bool required)
+{
+	struct hash_iter iter;
+	const void *v;
+
+	hash_iter_init(ctx->modules_by_name, &iter);
+	while (hash_iter_next(&iter, NULL, &v))
+		kmod_module_set_required((struct kmod_module *)v, required);
+}
+
+static bool is_cache_invalid(const char *path, unsigned long long stamp)
+{
+	struct stat st;
+
+	if (stat(path, &st) < 0)
+		return true;
+
+	if (stamp != stat_mstamp(&st))
+		return true;
+
+	return false;
+}
+
+/**
+ * kmod_validate_resources:
+ * @ctx: kmod library context
+ *
+ * Check if indexes and configuration files changed on disk and the current
+ * context is not valid anymore.
+ *
+ * Returns: KMOD_RESOURCES_OK if resources are still valid,
+ * KMOD_RESOURCES_MUST_RELOAD if it's sufficient to call
+ * kmod_unload_resources() and kmod_load_resources() or
+ * KMOD_RESOURCES_MUST_RECREATE if @ctx must be re-created.
+ */
+KMOD_EXPORT int kmod_validate_resources(struct kmod_ctx *ctx)
+{
+	struct kmod_list *l;
+	size_t i;
+
+	if (ctx == NULL || ctx->config == NULL)
+		return KMOD_RESOURCES_MUST_RECREATE;
+
+	kmod_list_foreach(l, ctx->config->paths) {
+		struct kmod_config_path *cf = l->data;
+
+		if (is_cache_invalid(cf->path, cf->stamp))
+			return KMOD_RESOURCES_MUST_RECREATE;
+	}
+
+	for (i = 0; i < _KMOD_INDEX_MODULES_SIZE; i++) {
+		char path[PATH_MAX];
+
+		if (ctx->indexes[i] == NULL)
+			continue;
+
+		snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname,
+						index_files[i].fn);
+
+		if (is_cache_invalid(path, ctx->indexes_stamp[i]))
+			return KMOD_RESOURCES_MUST_RELOAD;
+	}
+
+	return KMOD_RESOURCES_OK;
+}
+
+/**
+ * kmod_load_resources:
+ * @ctx: kmod library context
+ *
+ * Load indexes and keep them open in @ctx. This way it's faster to lookup
+ * information within the indexes. If this function is not called before a
+ * search, the necessary index is always opened and closed.
+ *
+ * If user will do more than one or two lookups, insertions, deletions, most
+ * likely it's good to call this function first. Particularly in a daemon like
+ * udev that on bootup issues hundreds of calls to lookup the index, calling
+ * this function will speedup the searches.
+ *
+ * Returns: 0 on success or < 0 otherwise.
+ */
+KMOD_EXPORT int kmod_load_resources(struct kmod_ctx *ctx)
+{
+	int ret = 0;
+	size_t i;
+
+	if (ctx == NULL)
+		return -ENOENT;
+
+	for (i = 0; i < _KMOD_INDEX_MODULES_SIZE; i++) {
+		char path[PATH_MAX];
+
+		if (ctx->indexes[i] != NULL) {
+			INFO(ctx, "Index %s already loaded\n",
+							index_files[i].fn);
+			continue;
+		}
+
+		snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname,
+							index_files[i].fn);
+		ret = index_mm_open(ctx, path, &ctx->indexes_stamp[i],
+				    &ctx->indexes[i]);
+
+		/*
+		 * modules.builtin.alias are considered optional since it's
+		 * recently added and older installations may not have it;
+		 * we allow failing for any reason
+		 */
+		if (ret) {
+			if (i != KMOD_INDEX_MODULES_BUILTIN_ALIAS)
+				break;
+			ret = 0;
+		}
+	}
+
+	if (ret)
+		kmod_unload_resources(ctx);
+
+	return ret;
+}
+
+/**
+ * kmod_unload_resources:
+ * @ctx: kmod library context
+ *
+ * Unload all the indexes. This will free the resources to maintain the index
+ * open and all subsequent searches will need to open and close the index.
+ *
+ * User is free to call kmod_load_resources() and kmod_unload_resources() as
+ * many times as wanted during the lifecycle of @ctx. For example, if a daemon
+ * knows that when starting up it will lookup a lot of modules, it could call
+ * kmod_load_resources() and after the first burst of searches is gone, it
+ * could free the resources by calling kmod_unload_resources().
+ *
+ * Returns: 0 on success or < 0 otherwise.
+ */
+KMOD_EXPORT void kmod_unload_resources(struct kmod_ctx *ctx)
+{
+	size_t i;
+
+	if (ctx == NULL)
+		return;
+
+	for (i = 0; i < _KMOD_INDEX_MODULES_SIZE; i++) {
+		if (ctx->indexes[i] != NULL) {
+			index_mm_close(ctx->indexes[i]);
+			ctx->indexes[i] = NULL;
+			ctx->indexes_stamp[i] = 0;
+		}
+	}
+}
+
+/**
+ * kmod_dump_index:
+ * @ctx: kmod library context
+ * @type: index to dump, valid indexes are
+ * KMOD_INDEX_MODULES_DEP: index of module dependencies;
+ * KMOD_INDEX_MODULES_ALIAS: index of module aliases;
+ * KMOD_INDEX_MODULES_SYMBOL: index of symbol aliases;
+ * KMOD_INDEX_MODULES_BUILTIN: index of builtin module.
+ * @fd: file descriptor to dump index to
+ *
+ * Dump index to file descriptor. Note that this function doesn't use stdio.h
+ * so call fflush() before calling this function to be sure data is written in
+ * order.
+ *
+ * Returns: 0 on success or < 0 otherwise.
+ */
+KMOD_EXPORT int kmod_dump_index(struct kmod_ctx *ctx, enum kmod_index type,
+									int fd)
+{
+	if (ctx == NULL)
+		return -ENOSYS;
+
+	if (type < 0 || type >= _KMOD_INDEX_MODULES_SIZE)
+		return -ENOENT;
+
+	if (ctx->indexes[type] != NULL) {
+		DBG(ctx, "use mmaped index '%s'\n", index_files[type].fn);
+		index_mm_dump(ctx->indexes[type], fd,
+						index_files[type].prefix);
+	} else {
+		char fn[PATH_MAX];
+		struct index_file *idx;
+
+		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,
+						index_files[type].fn);
+
+		DBG(ctx, "file=%s\n", fn);
+
+		idx = index_file_open(fn);
+		if (idx == NULL)
+			return -ENOSYS;
+
+		index_dump(idx, fd, index_files[type].prefix);
+		index_file_close(idx);
+	}
+
+	return 0;
+}
+
+const struct kmod_config *kmod_get_config(const struct kmod_ctx *ctx)
+{
+	return ctx->config;
+}
+
+enum kmod_file_compression_type kmod_get_kernel_compression(const struct kmod_ctx *ctx)
+{
+	return ctx->kernel_compression;
+}
diff --git a/libkmod/libkmod.h b/libkmod/libkmod.h
new file mode 100644
index 0000000..7251aa7
--- /dev/null
+++ b/libkmod/libkmod.h
@@ -0,0 +1,270 @@
+/*
+ * libkmod - interface to kernel module operations
+ *
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#ifndef _LIBKMOD_H_
+#define _LIBKMOD_H_
+
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <inttypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * kmod_ctx
+ *
+ * library user context - reads the config and system
+ * environment, user variables, allows custom logging
+ */
+struct kmod_ctx;
+struct kmod_ctx *kmod_new(const char *dirname, const char * const *config_paths);
+struct kmod_ctx *kmod_ref(struct kmod_ctx *ctx);
+struct kmod_ctx *kmod_unref(struct kmod_ctx *ctx);
+void kmod_set_log_fn(struct kmod_ctx *ctx,
+			void (*log_fn)(void *log_data,
+					int priority, const char *file, int line,
+					const char *fn, const char *format,
+					va_list args),
+			const void *data);
+int kmod_get_log_priority(const struct kmod_ctx *ctx);
+void kmod_set_log_priority(struct kmod_ctx *ctx, int priority);
+void *kmod_get_userdata(const struct kmod_ctx *ctx);
+void kmod_set_userdata(struct kmod_ctx *ctx, const void *userdata);
+
+const char *kmod_get_dirname(const struct kmod_ctx *ctx);
+
+/*
+ * Management of libkmod's resources
+ */
+int kmod_load_resources(struct kmod_ctx *ctx);
+void kmod_unload_resources(struct kmod_ctx *ctx);
+
+enum kmod_resources {
+	KMOD_RESOURCES_OK = 0,
+	KMOD_RESOURCES_MUST_RELOAD = 1,
+	KMOD_RESOURCES_MUST_RECREATE = 2,
+};
+int kmod_validate_resources(struct kmod_ctx *ctx);
+
+enum kmod_index {
+	KMOD_INDEX_MODULES_DEP = 0,
+	KMOD_INDEX_MODULES_ALIAS,
+	KMOD_INDEX_MODULES_SYMBOL,
+	KMOD_INDEX_MODULES_BUILTIN_ALIAS,
+	KMOD_INDEX_MODULES_BUILTIN,
+	/* Padding to make sure enum is not mapped to char */
+	_KMOD_INDEX_PAD = 1U << 31,
+};
+int kmod_dump_index(struct kmod_ctx *ctx, enum kmod_index type, int fd);
+
+/*
+ * kmod_list
+ *
+ * access to kmod generated lists
+ */
+struct kmod_list;
+struct kmod_list *kmod_list_next(const struct kmod_list *list,
+						const struct kmod_list *curr);
+struct kmod_list *kmod_list_prev(const struct kmod_list *list,
+						const struct kmod_list *curr);
+struct kmod_list *kmod_list_last(const struct kmod_list *list);
+
+#define kmod_list_foreach(list_entry, first_entry) \
+	for (list_entry = first_entry; \
+		list_entry != NULL; \
+		list_entry = kmod_list_next(first_entry, list_entry))
+
+#define kmod_list_foreach_reverse(list_entry, first_entry) \
+	for (list_entry = kmod_list_last(first_entry); \
+		list_entry != NULL; \
+		list_entry = kmod_list_prev(first_entry, list_entry))
+
+/*
+ * kmod_config_iter
+ *
+ * access to configuration lists - it allows to get each configuration's
+ * key/value stored by kmod
+ */
+struct kmod_config_iter;
+struct kmod_config_iter *kmod_config_get_blacklists(const struct kmod_ctx *ctx);
+struct kmod_config_iter *kmod_config_get_install_commands(const struct kmod_ctx *ctx);
+struct kmod_config_iter *kmod_config_get_remove_commands(const struct kmod_ctx *ctx);
+struct kmod_config_iter *kmod_config_get_aliases(const struct kmod_ctx *ctx);
+struct kmod_config_iter *kmod_config_get_options(const struct kmod_ctx *ctx);
+struct kmod_config_iter *kmod_config_get_softdeps(const struct kmod_ctx *ctx);
+const char *kmod_config_iter_get_key(const struct kmod_config_iter *iter);
+const char *kmod_config_iter_get_value(const struct kmod_config_iter *iter);
+bool kmod_config_iter_next(struct kmod_config_iter *iter);
+void kmod_config_iter_free_iter(struct kmod_config_iter *iter);
+
+/*
+ * kmod_module
+ *
+ * Operate on kernel modules
+ */
+struct kmod_module;
+int kmod_module_new_from_name(struct kmod_ctx *ctx, const char *name,
+						struct kmod_module **mod);
+int kmod_module_new_from_path(struct kmod_ctx *ctx, const char *path,
+						struct kmod_module **mod);
+int kmod_module_new_from_lookup(struct kmod_ctx *ctx, const char *given_alias,
+						struct kmod_list **list);
+int kmod_module_new_from_name_lookup(struct kmod_ctx *ctx,
+				     const char *modname,
+				     struct kmod_module **mod);
+int kmod_module_new_from_loaded(struct kmod_ctx *ctx,
+						struct kmod_list **list);
+
+struct kmod_module *kmod_module_ref(struct kmod_module *mod);
+struct kmod_module *kmod_module_unref(struct kmod_module *mod);
+int kmod_module_unref_list(struct kmod_list *list);
+struct kmod_module *kmod_module_get_module(const struct kmod_list *entry);
+
+
+/* Removal flags */
+enum kmod_remove {
+	KMOD_REMOVE_FORCE = O_TRUNC,
+	KMOD_REMOVE_NOWAIT = O_NONBLOCK, /* always set */
+	/* libkmod-only defines, not passed to kernel */
+	KMOD_REMOVE_NOLOG = 1,
+};
+
+/* Insertion flags */
+enum kmod_insert {
+	KMOD_INSERT_FORCE_VERMAGIC = 0x1,
+	KMOD_INSERT_FORCE_MODVERSION = 0x2,
+};
+
+/* Flags to kmod_module_probe_insert_module() */
+enum kmod_probe {
+	KMOD_PROBE_FORCE_VERMAGIC =		0x00001,
+	KMOD_PROBE_FORCE_MODVERSION =		0x00002,
+	KMOD_PROBE_IGNORE_COMMAND =		0x00004,
+	KMOD_PROBE_IGNORE_LOADED =		0x00008,
+	KMOD_PROBE_DRY_RUN =			0x00010,
+	KMOD_PROBE_FAIL_ON_LOADED =		0x00020,
+
+	/* codes below can be used in return value, too */
+	KMOD_PROBE_APPLY_BLACKLIST_ALL =	0x10000,
+	KMOD_PROBE_APPLY_BLACKLIST =		0x20000,
+	KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY =	0x40000,
+};
+
+/* Flags to kmod_module_apply_filter() */
+enum kmod_filter {
+	KMOD_FILTER_BLACKLIST = 0x00001,
+	KMOD_FILTER_BUILTIN = 0x00002,
+};
+
+int kmod_module_remove_module(struct kmod_module *mod, unsigned int flags);
+int kmod_module_insert_module(struct kmod_module *mod, unsigned int flags,
+							const char *options);
+int kmod_module_probe_insert_module(struct kmod_module *mod,
+			unsigned int flags, const char *extra_options,
+			int (*run_install)(struct kmod_module *m,
+						const char *cmdline, void *data),
+			const void *data,
+			void (*print_action)(struct kmod_module *m, bool install,
+						const char *options));
+
+
+const char *kmod_module_get_name(const struct kmod_module *mod);
+const char *kmod_module_get_path(const struct kmod_module *mod);
+const char *kmod_module_get_options(const struct kmod_module *mod);
+const char *kmod_module_get_install_commands(const struct kmod_module *mod);
+const char *kmod_module_get_remove_commands(const struct kmod_module *mod);
+struct kmod_list *kmod_module_get_dependencies(const struct kmod_module *mod);
+int kmod_module_get_softdeps(const struct kmod_module *mod,
+				struct kmod_list **pre, struct kmod_list **post);
+int kmod_module_get_filtered_blacklist(const struct kmod_ctx *ctx,
+					const struct kmod_list *input,
+					struct kmod_list **output) __attribute__ ((deprecated));
+int kmod_module_apply_filter(const struct kmod_ctx *ctx,
+					enum kmod_filter filter_type,
+					const struct kmod_list *input,
+					struct kmod_list **output);
+
+
+
+/*
+ * Information regarding "live information" from module's state, as returned
+ * by kernel
+ */
+
+enum kmod_module_initstate {
+	KMOD_MODULE_BUILTIN = 0,
+	KMOD_MODULE_LIVE,
+	KMOD_MODULE_COMING,
+	KMOD_MODULE_GOING,
+	/* Padding to make sure enum is not mapped to char */
+	_KMOD_MODULE_PAD = 1U << 31,
+};
+const char *kmod_module_initstate_str(enum kmod_module_initstate state);
+int kmod_module_get_initstate(const struct kmod_module *mod);
+int kmod_module_get_refcnt(const struct kmod_module *mod);
+struct kmod_list *kmod_module_get_holders(const struct kmod_module *mod);
+struct kmod_list *kmod_module_get_sections(const struct kmod_module *mod);
+const char *kmod_module_section_get_name(const struct kmod_list *entry);
+unsigned long kmod_module_section_get_address(const struct kmod_list *entry);
+void kmod_module_section_free_list(struct kmod_list *list);
+long kmod_module_get_size(const struct kmod_module *mod);
+
+
+
+/*
+ * Information retrieved from ELF headers and sections
+ */
+
+int kmod_module_get_info(const struct kmod_module *mod, struct kmod_list **list);
+const char *kmod_module_info_get_key(const struct kmod_list *entry);
+const char *kmod_module_info_get_value(const struct kmod_list *entry);
+void kmod_module_info_free_list(struct kmod_list *list);
+
+int kmod_module_get_versions(const struct kmod_module *mod, struct kmod_list **list);
+const char *kmod_module_version_get_symbol(const struct kmod_list *entry);
+uint64_t kmod_module_version_get_crc(const struct kmod_list *entry);
+void kmod_module_versions_free_list(struct kmod_list *list);
+
+int kmod_module_get_symbols(const struct kmod_module *mod, struct kmod_list **list);
+const char *kmod_module_symbol_get_symbol(const struct kmod_list *entry);
+uint64_t kmod_module_symbol_get_crc(const struct kmod_list *entry);
+void kmod_module_symbols_free_list(struct kmod_list *list);
+
+enum kmod_symbol_bind {
+	KMOD_SYMBOL_NONE = '\0',
+	KMOD_SYMBOL_LOCAL = 'L',
+	KMOD_SYMBOL_GLOBAL = 'G',
+	KMOD_SYMBOL_WEAK = 'W',
+	KMOD_SYMBOL_UNDEF = 'U'
+};
+
+int kmod_module_get_dependency_symbols(const struct kmod_module *mod, struct kmod_list **list);
+const char *kmod_module_dependency_symbol_get_symbol(const struct kmod_list *entry);
+int kmod_module_dependency_symbol_get_bind(const struct kmod_list *entry);
+uint64_t kmod_module_dependency_symbol_get_crc(const struct kmod_list *entry);
+void kmod_module_dependency_symbols_free_list(struct kmod_list *list);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+#endif
diff --git a/libkmod/libkmod.pc.in b/libkmod/libkmod.pc.in
new file mode 100644
index 0000000..3acca6a
--- /dev/null
+++ b/libkmod/libkmod.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libkmod
+Description: Library to deal with kernel modules
+Version: @VERSION@
+Libs: -L${libdir} -lkmod
+Libs.private: @libzstd_LIBS@ @liblzma_LIBS@ @zlib_LIBS@
+Cflags: -I${includedir}
diff --git a/libkmod/libkmod.sym b/libkmod/libkmod.sym
new file mode 100644
index 0000000..0c04fda
--- /dev/null
+++ b/libkmod/libkmod.sym
@@ -0,0 +1,94 @@
+LIBKMOD_5 {
+global:
+	kmod_get_log_priority;
+	kmod_get_userdata;
+	kmod_new;
+	kmod_ref;
+	kmod_set_log_fn;
+	kmod_set_log_priority;
+	kmod_set_userdata;
+	kmod_unref;
+	kmod_list_next;
+	kmod_list_prev;
+	kmod_list_last;
+
+	kmod_load_resources;
+	kmod_unload_resources;
+	kmod_validate_resources;
+	kmod_config_get_blacklists;
+	kmod_config_get_install_commands;
+	kmod_config_get_remove_commands;
+	kmod_config_get_aliases;
+	kmod_config_get_options;
+	kmod_config_get_softdeps;
+	kmod_config_iter_get_key;
+	kmod_config_iter_get_value;
+	kmod_config_iter_next;
+	kmod_config_iter_free_iter;
+	kmod_dump_index;
+
+	kmod_module_new_from_name;
+	kmod_module_new_from_path;
+	kmod_module_new_from_lookup;
+	kmod_module_new_from_name_lookup;
+	kmod_module_new_from_loaded;
+	kmod_module_ref;
+	kmod_module_unref;
+	kmod_module_unref_list;
+	kmod_module_get_module;
+	kmod_module_remove_module;
+	kmod_module_insert_module;
+	kmod_module_probe_insert_module;
+
+	kmod_module_get_dependencies;
+	kmod_module_get_softdeps;
+	kmod_module_get_filtered_blacklist;
+
+	kmod_module_get_name;
+	kmod_module_get_path;
+
+	kmod_module_initstate_str;
+	kmod_module_get_initstate;
+	kmod_module_get_refcnt;
+	kmod_module_get_sections;
+	kmod_module_section_free_list;
+	kmod_module_section_get_name;
+	kmod_module_section_get_address;
+	kmod_module_get_holders;
+	kmod_module_get_size;
+
+	kmod_module_get_options;
+	kmod_module_get_install_commands;
+	kmod_module_get_remove_commands;
+
+	kmod_module_get_info;
+	kmod_module_info_get_key;
+	kmod_module_info_get_value;
+	kmod_module_info_free_list;
+	kmod_module_get_versions;
+	kmod_module_version_get_symbol;
+	kmod_module_version_get_crc;
+	kmod_module_versions_free_list;
+	kmod_module_get_symbols;
+	kmod_module_symbol_get_symbol;
+	kmod_module_symbol_get_crc;
+	kmod_module_symbols_free_list;
+
+	kmod_module_get_dependency_symbols;
+	kmod_module_dependency_symbol_get_symbol;
+	kmod_module_dependency_symbol_get_crc;
+	kmod_module_dependency_symbol_get_bind;
+	kmod_module_dependency_symbols_free_list;
+local:
+        *;
+};
+
+LIBKMOD_6 {
+global:
+	kmod_module_apply_filter;
+} LIBKMOD_5;
+
+LIBKMOD_22 {
+global:
+	kmod_get_dirname;
+} LIBKMOD_6;