blob: e0e1ca7ebc380f1e9ddfc342cbc4d772f284f627 [file] [log] [blame]
/* 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.
#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);
struct aa_ns;
enum {
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 */