Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 425 insertions, 0 deletions

diff --git a/source4/ntvfs/posix/vfs_posix.c b/source4/ntvfs/posix/vfs_posix.c
new file mode 100644
index 0000000..9f13158
--- /dev/null
+++ b/source4/ntvfs/posix/vfs_posix.c
@@ -0,0 +1,425 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   POSIX NTVFS backend
+
+   Copyright (C) Andrew Tridgell 2004
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program 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 General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+  this implements most of the POSIX NTVFS backend
+  This is the default backend
+*/
+
+#include "includes.h"
+#include "vfs_posix.h"
+#include "librpc/gen_ndr/security.h"
+#include <tdb.h>
+#include "lib/tdb_wrap/tdb_wrap.h"
+#include "libcli/security/security.h"
+#include "lib/events/events.h"
+#include "param/param.h"
+
+/*
+  setup config options for a posix share
+*/
+static void pvfs_setup_options(struct pvfs_state *pvfs)
+{
+	struct share_config *scfg = pvfs->ntvfs->ctx->config;
+	char *eadb;
+	char *xattr_backend;
+	bool def_perm_override = false;
+
+	if (share_bool_option(scfg, SHARE_MAP_HIDDEN, SHARE_MAP_HIDDEN_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_MAP_HIDDEN;
+	if (share_bool_option(scfg, SHARE_MAP_ARCHIVE, SHARE_MAP_ARCHIVE_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_MAP_ARCHIVE;
+	if (share_bool_option(scfg, SHARE_MAP_SYSTEM, SHARE_MAP_SYSTEM_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_MAP_SYSTEM;
+	if (share_bool_option(scfg, SHARE_READONLY, SHARE_READONLY_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_READONLY;
+	if (share_bool_option(scfg, SHARE_STRICT_SYNC, SHARE_STRICT_SYNC_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_STRICT_SYNC;
+	if (share_bool_option(scfg, SHARE_STRICT_LOCKING, SHARE_STRICT_LOCKING_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_STRICT_LOCKING;
+	if (share_bool_option(scfg, SHARE_CI_FILESYSTEM, SHARE_CI_FILESYSTEM_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_CI_FILESYSTEM;
+	if (share_bool_option(scfg, PVFS_FAKE_OPLOCKS, PVFS_FAKE_OPLOCKS_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_FAKE_OPLOCKS;
+
+#if defined(O_DIRECTORY) && defined(O_NOFOLLOW)
+	/* set PVFS_PERM_OVERRIDE by default only if the system
+	 * supports the necessary capabilities to make it secure
+	 */
+	def_perm_override = true;
+#endif
+	if (share_bool_option(scfg, PVFS_PERM_OVERRIDE, def_perm_override))
+		pvfs->flags |= PVFS_FLAG_PERM_OVERRIDE;
+
+	/* file perm options */
+	pvfs->options.create_mask       = share_int_option(scfg,
+							   SHARE_CREATE_MASK,
+							   SHARE_CREATE_MASK_DEFAULT);
+	pvfs->options.dir_mask          = share_int_option(scfg,
+							   SHARE_DIR_MASK,
+							   SHARE_DIR_MASK_DEFAULT);
+	pvfs->options.force_dir_mode    = share_int_option(scfg,
+							   SHARE_FORCE_DIR_MODE,
+							   SHARE_FORCE_DIR_MODE_DEFAULT);
+	pvfs->options.force_create_mode = share_int_option(scfg,
+							   SHARE_FORCE_CREATE_MODE,
+							   SHARE_FORCE_CREATE_MODE_DEFAULT);
+	/* this must be a power of 2 */
+	pvfs->alloc_size_rounding = share_int_option(scfg,
+							PVFS_ALLOCATION_ROUNDING,
+							PVFS_ALLOCATION_ROUNDING_DEFAULT);
+
+	pvfs->search.inactivity_time = share_int_option(scfg,
+							PVFS_SEARCH_INACTIVITY,
+							PVFS_SEARCH_INACTIVITY_DEFAULT);
+
+#ifdef HAVE_XATTR_SUPPORT
+	if (share_bool_option(scfg, PVFS_XATTR, PVFS_XATTR_DEFAULT))
+		pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
+#endif
+
+	pvfs->sharing_violation_delay = share_int_option(scfg,
+							PVFS_SHARE_DELAY,
+							PVFS_SHARE_DELAY_DEFAULT);
+
+	pvfs->oplock_break_timeout = share_int_option(scfg,
+						      PVFS_OPLOCK_TIMEOUT,
+						      PVFS_OPLOCK_TIMEOUT_DEFAULT);
+
+	pvfs->writetime_delay = share_int_option(scfg,
+						 PVFS_WRITETIME_DELAY,
+						 PVFS_WRITETIME_DELAY_DEFAULT);
+
+	pvfs->share_name = talloc_strdup(pvfs, scfg->name);
+
+	pvfs->fs_attribs = 
+		FS_ATTR_CASE_SENSITIVE_SEARCH | 
+		FS_ATTR_CASE_PRESERVED_NAMES |
+		FS_ATTR_UNICODE_ON_DISK;
+
+	/* allow xattrs to be stored in a external tdb */
+	eadb = share_string_option(pvfs, scfg, PVFS_EADB, NULL);
+	if (eadb != NULL) {
+		pvfs->ea_db = tdb_wrap_open(
+			pvfs, eadb, 50000,
+			lpcfg_tdb_flags(pvfs->ntvfs->ctx->lp_ctx, TDB_DEFAULT),
+			O_RDWR|O_CREAT, 0600);
+		if (pvfs->ea_db != NULL) {
+			pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
+		} else {
+			DEBUG(0,("Failed to open eadb '%s' - %s\n",
+				 eadb, strerror(errno)));
+			pvfs->flags &= ~PVFS_FLAG_XATTR_ENABLE;
+		}
+		TALLOC_FREE(eadb);
+	}
+
+	if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
+		pvfs->fs_attribs |= FS_ATTR_NAMED_STREAMS;
+	}
+	if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
+		pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS;
+	}
+
+	pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER);
+	pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP);
+
+	/* check if the system really supports xattrs */
+	if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
+		pvfs_xattr_probe(pvfs);
+	}
+
+	/* enable an ACL backend */
+	xattr_backend = share_string_option(pvfs, scfg, PVFS_ACL, "xattr");
+	pvfs->acl_ops = pvfs_acl_backend_byname(xattr_backend);
+	TALLOC_FREE(xattr_backend);
+}
+
+static int pvfs_state_destructor(struct pvfs_state *pvfs)
+{
+	struct pvfs_file *f, *fn;
+	struct pvfs_search_state *s, *sn;
+
+	/* 
+	 * make sure we cleanup files and searches before anything else
+	 * because there destructors need to acess the pvfs_state struct
+	 */
+	for (f=pvfs->files.list; f; f=fn) {
+		fn = f->next;
+		talloc_free(f);
+	}
+
+	for (s=pvfs->search.list; s; s=sn) {
+		sn = s->next;
+		talloc_free(s);
+	}
+
+	return 0;
+}
+
+/*
+  connect to a share - used when a tree_connect operation comes
+  in. For a disk based backend we needs to ensure that the base
+  directory exists (tho it doesn't need to be accessible by the user,
+  that comes later)
+*/
+static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
+			     struct ntvfs_request *req,
+			     union smb_tcon* tcon)
+{
+	struct pvfs_state *pvfs;
+	struct stat st;
+	char *base_directory;
+	NTSTATUS status;
+	const char *sharename;
+
+	switch (tcon->generic.level) {
+	case RAW_TCON_TCON:
+		sharename = tcon->tcon.in.service;
+		break;
+	case RAW_TCON_TCONX:
+		sharename = tcon->tconx.in.path;
+		break;
+	case RAW_TCON_SMB2:
+		sharename = tcon->smb2.in.path;
+		break;
+	default:
+		return NT_STATUS_INVALID_LEVEL;
+	}
+
+	if (strncmp(sharename, "\\\\", 2) == 0) {
+		char *p = strchr(sharename+2, '\\');
+		if (p) {
+			sharename = p + 1;
+		}
+	}
+
+	/*
+	 * TODO: call this from ntvfs_posix_init()
+	 *       but currently we don't have a lp_ctx there
+	 */
+	status = pvfs_acl_init();
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	pvfs = talloc_zero(ntvfs, struct pvfs_state);
+	NT_STATUS_HAVE_NO_MEMORY(pvfs);
+
+	/* for simplicity of path construction, remove any trailing slash now */
+	base_directory = share_string_option(pvfs, ntvfs->ctx->config, SHARE_PATH, "");
+	NT_STATUS_HAVE_NO_MEMORY(base_directory);
+	if (strcmp(base_directory, "/") != 0) {
+		trim_string(base_directory, NULL, "/");
+	}
+
+	pvfs->ntvfs = ntvfs;
+	pvfs->base_directory = base_directory;
+
+	/* the directory must exist. Note that we deliberately don't
+	   check that it is readable */
+	if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
+		DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n", 
+			 pvfs->base_directory, sharename));
+		return NT_STATUS_BAD_NETWORK_NAME;
+	}
+
+	ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
+	NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
+
+	ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
+	NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
+
+	if (tcon->generic.level == RAW_TCON_TCONX) {
+		tcon->tconx.out.fs_type = ntvfs->ctx->fs_type;
+		tcon->tconx.out.dev_type = ntvfs->ctx->dev_type;
+	}
+
+	ntvfs->private_data = pvfs;
+
+	pvfs->brl_context = brlock_init(pvfs, 
+				     pvfs->ntvfs->ctx->server_id,
+				     pvfs->ntvfs->ctx->lp_ctx,
+				     pvfs->ntvfs->ctx->msg_ctx);
+	if (pvfs->brl_context == NULL) {
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
+	if (pvfs->odb_context == NULL) {
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	/* allow this to be NULL - we just disable change notify */
+	pvfs->notify_context = notify_init(pvfs, 
+					   pvfs->ntvfs->ctx->server_id,  
+					   pvfs->ntvfs->ctx->msg_ctx, 
+					   pvfs->ntvfs->ctx->lp_ctx,
+					   pvfs->ntvfs->ctx->event_ctx,
+					   pvfs->ntvfs->ctx->config);
+
+	/* allocate the search handle -> ptr tree */
+	pvfs->search.idtree = idr_init(pvfs);
+	NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
+
+	status = pvfs_mangle_init(pvfs);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	pvfs_setup_options(pvfs);
+
+	talloc_set_destructor(pvfs, pvfs_state_destructor);
+
+#ifdef SIGXFSZ
+	/* who had the stupid idea to generate a signal on a large
+	   file write instead of just failing it!? */
+	BlockSignals(true, SIGXFSZ);
+#endif
+
+	return NT_STATUS_OK;
+}
+
+/*
+  disconnect from a share
+*/
+static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
+{
+	return NT_STATUS_OK;
+}
+
+/*
+  check if a directory exists
+*/
+static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
+			     struct ntvfs_request *req,
+			     union smb_chkpath *cp)
+{
+	struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
+				  struct pvfs_state);
+	struct pvfs_filename *name;
+	NTSTATUS status;
+
+	/* resolve the cifs name to a posix name */
+	status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	if (!name->exists) {
+		return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+	}
+
+	if (!S_ISDIR(name->st.st_mode)) {
+		return NT_STATUS_NOT_A_DIRECTORY;
+	}
+
+	return NT_STATUS_OK;
+}
+
+/*
+  copy a set of files
+*/
+static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs,
+			  struct ntvfs_request *req, struct smb_copy *cp)
+{
+	DEBUG(0,("pvfs_copy not implemented\n"));
+	return NT_STATUS_NOT_SUPPORTED;
+}
+
+/*
+  return print queue info
+*/
+static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs,
+			 struct ntvfs_request *req, union smb_lpq *lpq)
+{
+	return NT_STATUS_NOT_SUPPORTED;
+}
+
+/* SMBtrans - not used on file shares */
+static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs,
+			   struct ntvfs_request *req, struct smb_trans2 *trans2)
+{
+	return NT_STATUS_ACCESS_DENIED;
+}
+
+/*
+  initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
+ */
+NTSTATUS ntvfs_posix_init(TALLOC_CTX *ctx)
+{
+	NTSTATUS ret;
+	struct ntvfs_ops ops;
+	NTVFS_CURRENT_CRITICAL_SIZES(vers);
+
+	ZERO_STRUCT(ops);
+
+	ops.type = NTVFS_DISK;
+	
+	/* fill in all the operations */
+	ops.connect_fn = pvfs_connect;
+	ops.disconnect_fn = pvfs_disconnect;
+	ops.unlink_fn = pvfs_unlink;
+	ops.chkpath_fn = pvfs_chkpath;
+	ops.qpathinfo_fn = pvfs_qpathinfo;
+	ops.setpathinfo_fn = pvfs_setpathinfo;
+	ops.open_fn = pvfs_open;
+	ops.mkdir_fn = pvfs_mkdir;
+	ops.rmdir_fn = pvfs_rmdir;
+	ops.rename_fn = pvfs_rename;
+	ops.copy_fn = pvfs_copy;
+	ops.ioctl_fn = pvfs_ioctl;
+	ops.read_fn = pvfs_read;
+	ops.write_fn = pvfs_write;
+	ops.seek_fn = pvfs_seek;
+	ops.flush_fn = pvfs_flush;
+	ops.close_fn = pvfs_close;
+	ops.exit_fn = pvfs_exit;
+	ops.lock_fn = pvfs_lock;
+	ops.setfileinfo_fn = pvfs_setfileinfo;
+	ops.qfileinfo_fn = pvfs_qfileinfo;
+	ops.fsinfo_fn = pvfs_fsinfo;
+	ops.lpq_fn = pvfs_lpq;
+	ops.search_first_fn = pvfs_search_first;
+	ops.search_next_fn = pvfs_search_next;
+	ops.search_close_fn = pvfs_search_close;
+	ops.trans_fn = pvfs_trans;
+	ops.logoff_fn = pvfs_logoff;
+	ops.async_setup_fn = pvfs_async_setup;
+	ops.cancel_fn = pvfs_cancel;
+	ops.notify_fn = pvfs_notify;
+
+	/* register ourselves with the NTVFS subsystem. We register
+	   under the name 'default' as we wish to be the default
+	   backend, and also register as 'posix' */
+	ops.name = "default";
+	ret = ntvfs_register(&ops, &vers);
+
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
+	}
+
+	ops.name = "posix";
+	ret = ntvfs_register(&ops, &vers);
+
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
+	}
+
+	if (NT_STATUS_IS_OK(ret)) {
+		ret = ntvfs_common_init();
+	}
+
+	return ret;
+}