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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /security/apparmor/include/policy_unpack.h
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'security/apparmor/include/policy_unpack.h')
-rw-r--r--security/apparmor/include/policy_unpack.h127
1 files changed, 127 insertions, 0 deletions
diff --git a/security/apparmor/include/policy_unpack.h b/security/apparmor/include/policy_unpack.h
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+++ b/security/apparmor/include/policy_unpack.h
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * AppArmor security module
+ *
+ * This file contains AppArmor policy loading interface function definitions.
+ *
+ * Copyright (C) 1998-2008 Novell/SUSE
+ * Copyright 2009-2010 Canonical Ltd.
+ */
+
+#ifndef __POLICY_INTERFACE_H
+#define __POLICY_INTERFACE_H
+
+#include <linux/list.h>
+#include <linux/kref.h>
+#include <linux/dcache.h>
+#include <linux/workqueue.h>
+
+struct aa_load_ent {
+ struct list_head list;
+ struct aa_profile *new;
+ struct aa_profile *old;
+ struct aa_profile *rename;
+ const char *ns_name;
+};
+
+void aa_load_ent_free(struct aa_load_ent *ent);
+struct aa_load_ent *aa_load_ent_alloc(void);
+
+#define PACKED_FLAG_HAT 1
+
+#define PACKED_MODE_ENFORCE 0
+#define PACKED_MODE_COMPLAIN 1
+#define PACKED_MODE_KILL 2
+#define PACKED_MODE_UNCONFINED 3
+
+struct aa_ns;
+
+enum {
+ AAFS_LOADDATA_ABI = 0,
+ AAFS_LOADDATA_REVISION,
+ AAFS_LOADDATA_HASH,
+ AAFS_LOADDATA_DATA,
+ AAFS_LOADDATA_COMPRESSED_SIZE,
+ AAFS_LOADDATA_DIR, /* must be last actual entry */
+ AAFS_LOADDATA_NDENTS /* count of entries */
+};
+
+/*
+ * struct aa_loaddata - buffer of policy raw_data set
+ *
+ * there is no loaddata ref for being on ns list, nor a ref from
+ * d_inode(@dentry) when grab a ref from these, @ns->lock must be held
+ * && __aa_get_loaddata() needs to be used, and the return value
+ * checked, if NULL the loaddata is already being reaped and should be
+ * considered dead.
+ */
+struct aa_loaddata {
+ struct kref count;
+ struct list_head list;
+ struct work_struct work;
+ struct dentry *dents[AAFS_LOADDATA_NDENTS];
+ struct aa_ns *ns;
+ char *name;
+ size_t size; /* the original size of the payload */
+ size_t compressed_size; /* the compressed size of the payload */
+ long revision; /* the ns policy revision this caused */
+ int abi;
+ unsigned char *hash;
+
+ /* Pointer to payload. If @compressed_size > 0, then this is the
+ * compressed version of the payload, else it is the uncompressed
+ * version (with the size indicated by @size).
+ */
+ char *data;
+};
+
+int aa_unpack(struct aa_loaddata *udata, struct list_head *lh, const char **ns);
+
+/**
+ * __aa_get_loaddata - get a reference count to uncounted data reference
+ * @data: reference to get a count on
+ *
+ * Returns: pointer to reference OR NULL if race is lost and reference is
+ * being repeated.
+ * Requires: @data->ns->lock held, and the return code MUST be checked
+ *
+ * Use only from inode->i_private and @data->list found references
+ */
+static inline struct aa_loaddata *
+__aa_get_loaddata(struct aa_loaddata *data)
+{
+ if (data && kref_get_unless_zero(&(data->count)))
+ return data;
+
+ return NULL;
+}
+
+/**
+ * aa_get_loaddata - get a reference count from a counted data reference
+ * @data: reference to get a count on
+ *
+ * Returns: point to reference
+ * Requires: @data to have a valid reference count on it. It is a bug
+ * if the race to reap can be encountered when it is used.
+ */
+static inline struct aa_loaddata *
+aa_get_loaddata(struct aa_loaddata *data)
+{
+ struct aa_loaddata *tmp = __aa_get_loaddata(data);
+
+ AA_BUG(data && !tmp);
+
+ return tmp;
+}
+
+void __aa_loaddata_update(struct aa_loaddata *data, long revision);
+bool aa_rawdata_eq(struct aa_loaddata *l, struct aa_loaddata *r);
+void aa_loaddata_kref(struct kref *kref);
+struct aa_loaddata *aa_loaddata_alloc(size_t size);
+static inline void aa_put_loaddata(struct aa_loaddata *data)
+{
+ if (data)
+ kref_put(&data->count, aa_loaddata_kref);
+}
+
+#endif /* __POLICY_INTERFACE_H */