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apparmor: share profile name on replacement

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The profile names are the same, leverage this.

Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2017-06-09 07:09:05 -07:00
parent cf797c0e5e
commit a1bd627b46
3 changed files with 72 additions and 9 deletions
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32
security/apparmor/include/lib.h
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@ -100,6 +100,36 @@ static inline bool path_mediated_fs(struct dentry *dentry)
return !(dentry->d_sb->s_flags & MS_NOUSER);
}
struct counted_str {
struct kref count;
char name[];
};
#define str_to_counted(str) \
((struct counted_str *)(str - offsetof(struct counted_str, name)))
#define __counted /* atm just a notation */
void aa_str_kref(struct kref *kref);
char *aa_str_alloc(int size, gfp_t gfp);
static inline __counted char *aa_get_str(__counted char *str)
{
if (str)
kref_get(&(str_to_counted(str)->count));
return str;
}
static inline void aa_put_str(__counted char *str)
{
if (str)
kref_put(&str_to_counted(str)->count, aa_str_kref);
}
/* struct aa_policy - common part of both namespaces and profiles
* @name: name of the object
* @hname - The hierarchical name
@ -108,7 +138,7 @@ static inline bool path_mediated_fs(struct dentry *dentry)
*/
struct aa_policy {
const char *name;
const char *hname;
__counted char *hname;
struct list_head list;
struct list_head profiles;
};