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-rw-r--r--fs/notify/dnotify/dnotify.c3
-rw-r--r--fs/notify/group.c48
-rw-r--r--fs/notify/inotify/inotify_user.c11
-rw-r--r--include/linux/fsnotify_backend.h10
-rw-r--r--kernel/audit_tree.c3
-rw-r--r--kernel/audit_watch.c2
6 files changed, 7 insertions, 70 deletions
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index a213b83a59c..1f46aeac338 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -433,8 +433,7 @@ static int __init dnotify_init(void)
dnotify_struct_cache = KMEM_CACHE(dnotify_struct, SLAB_PANIC);
dnotify_mark_entry_cache = KMEM_CACHE(dnotify_mark_entry, SLAB_PANIC);
- dnotify_group = fsnotify_obtain_group(DNOTIFY_GROUP_NUM,
- 0, &dnotify_fsnotify_ops);
+ dnotify_group = fsnotify_obtain_group(0, &dnotify_fsnotify_ops);
if (IS_ERR(dnotify_group))
panic("unable to allocate fsnotify group for dnotify\n");
return 0;
diff --git a/fs/notify/group.c b/fs/notify/group.c
index 777ca821225..62fb8961a57 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -78,15 +78,6 @@ void fsnotify_recalc_group_mask(struct fsnotify_group *group)
}
/*
- * Take a reference to a group so things found under the fsnotify_grp_mutex
- * can't get freed under us
- */
-static void fsnotify_get_group(struct fsnotify_group *group)
-{
- atomic_inc(&group->refcnt);
-}
-
-/*
* Final freeing of a group
*/
void fsnotify_final_destroy_group(struct fsnotify_group *group)
@@ -171,40 +162,14 @@ void fsnotify_put_group(struct fsnotify_group *group)
}
/*
- * Simply run the fsnotify_groups list and find a group which matches
- * the given parameters. If a group is found we take a reference to that
- * group.
- */
-static struct fsnotify_group *fsnotify_find_group(unsigned int group_num, __u32 mask,
- const struct fsnotify_ops *ops)
-{
- struct fsnotify_group *group_iter;
- struct fsnotify_group *group = NULL;
-
- BUG_ON(!mutex_is_locked(&fsnotify_grp_mutex));
-
- list_for_each_entry_rcu(group_iter, &fsnotify_groups, group_list) {
- if (group_iter->group_num == group_num) {
- if ((group_iter->mask == mask) &&
- (group_iter->ops == ops)) {
- fsnotify_get_group(group_iter);
- group = group_iter;
- } else
- group = ERR_PTR(-EEXIST);
- }
- }
- return group;
-}
-
-/*
* Either finds an existing group which matches the group_num, mask, and ops or
* creates a new group and adds it to the global group list. In either case we
* take a reference for the group returned.
*/
-struct fsnotify_group *fsnotify_obtain_group(unsigned int group_num, __u32 mask,
+struct fsnotify_group *fsnotify_obtain_group(__u32 mask,
const struct fsnotify_ops *ops)
{
- struct fsnotify_group *group, *tgroup;
+ struct fsnotify_group *group;
/* very low use, simpler locking if we just always alloc */
group = kzalloc(sizeof(struct fsnotify_group), GFP_KERNEL);
@@ -214,7 +179,6 @@ struct fsnotify_group *fsnotify_obtain_group(unsigned int group_num, __u32 mask,
atomic_set(&group->refcnt, 1);
group->on_group_list = 0;
- group->group_num = group_num;
group->mask = mask;
mutex_init(&group->notification_mutex);
@@ -230,14 +194,6 @@ struct fsnotify_group *fsnotify_obtain_group(unsigned int group_num, __u32 mask,
group->ops = ops;
mutex_lock(&fsnotify_grp_mutex);
- tgroup = fsnotify_find_group(group_num, mask, ops);
- if (tgroup) {
- /* group already exists */
- mutex_unlock(&fsnotify_grp_mutex);
- /* destroy the new one we made */
- fsnotify_put_group(group);
- return tgroup;
- }
/* group not found, add a new one */
list_add_rcu(&group->group_list, &fsnotify_groups);
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index cbe16df326f..cae317f5bd9 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -51,12 +51,6 @@ int inotify_max_user_watches __read_mostly;
static struct kmem_cache *inotify_inode_mark_cachep __read_mostly;
struct kmem_cache *event_priv_cachep __read_mostly;
-/*
- * When inotify registers a new group it increments this and uses that
- * value as an offset to set the fsnotify group "name" and priority.
- */
-static atomic_t inotify_grp_num;
-
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
@@ -700,11 +694,8 @@ retry:
static struct fsnotify_group *inotify_new_group(struct user_struct *user, unsigned int max_events)
{
struct fsnotify_group *group;
- unsigned int grp_num;
- /* fsnotify_obtain_group took a reference to group, we put this when we kill the file in the end */
- grp_num = (INOTIFY_GROUP_NUM - atomic_inc_return(&inotify_grp_num));
- group = fsnotify_obtain_group(grp_num, 0, &inotify_fsnotify_ops);
+ group = fsnotify_obtain_group(0, &inotify_fsnotify_ops);
if (IS_ERR(group))
return group;
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 427f6ffab12..57e503d017c 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -60,12 +60,6 @@
#define FS_MOVE (FS_MOVED_FROM | FS_MOVED_TO)
-/* listeners that hard code group numbers near the top */
-#define DNOTIFY_GROUP_NUM UINT_MAX
-#define AUDIT_WATCH_GROUP_NUM (DNOTIFY_GROUP_NUM-1)
-#define AUDIT_TREE_GROUP_NUM (AUDIT_WATCH_GROUP_NUM-1)
-#define INOTIFY_GROUP_NUM (AUDIT_TREE_GROUP_NUM-1)
-
struct fsnotify_group;
struct fsnotify_event;
struct fsnotify_mark_entry;
@@ -124,7 +118,6 @@ struct fsnotify_group {
* closed.
*/
atomic_t refcnt; /* things with interest in this group */
- unsigned int group_num; /* simply prevents accidental group collision */
const struct fsnotify_ops *ops; /* how this group handles things */
@@ -312,8 +305,7 @@ static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode
/* must call when a group changes its ->mask */
extern void fsnotify_recalc_global_mask(void);
/* get a reference to an existing or create a new group */
-extern struct fsnotify_group *fsnotify_obtain_group(unsigned int group_num,
- __u32 mask,
+extern struct fsnotify_group *fsnotify_obtain_group(__u32 mask,
const struct fsnotify_ops *ops);
/* run all marks associated with this group and update group->mask */
extern void fsnotify_recalc_group_mask(struct fsnotify_group *group);
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index e3d63b596ef..59065e72a2e 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -937,8 +937,7 @@ static int __init audit_tree_init(void)
{
int i;
- audit_tree_group = fsnotify_obtain_group(AUDIT_TREE_GROUP_NUM,
- 0, &audit_tree_ops);
+ audit_tree_group = fsnotify_obtain_group(0, &audit_tree_ops);
if (IS_ERR(audit_tree_group))
audit_panic("cannot initialize fsnotify group for rectree watches");
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index 85c43aa292e..c500104d38c 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -577,7 +577,7 @@ static const struct fsnotify_ops audit_watch_fsnotify_ops = {
static int __init audit_watch_init(void)
{
- audit_watch_group = fsnotify_obtain_group(AUDIT_WATCH_GROUP_NUM, AUDIT_FS_WATCH,
+ audit_watch_group = fsnotify_obtain_group(AUDIT_FS_WATCH,
&audit_watch_fsnotify_ops);
if (IS_ERR(audit_watch_group)) {
audit_watch_group = NULL;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-03 14:27:02 +0000