Pointer to ->free_mark callback unnecessarily occupies one long in each
fsnotify_mark although they are the same for all marks from one
notification group. Move the callback pointer to fsnotify_ops.
Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/notify/dnotify/dnotify.c | 3 ++-
fs/notify/fanotify/fanotify.c | 6 ++++++
fs/notify/fanotify/fanotify.h | 1 +
fs/notify/fanotify/fanotify_user.c | 9 ++-------
fs/notify/inotify/inotify.h | 2 ++
fs/notify/inotify/inotify_fsnotify.c | 11 +++++++++++
fs/notify/inotify/inotify_user.c | 14 ++------------
fs/notify/mark.c | 13 +++++++------
include/linux/fsnotify_backend.h | 6 +++---
kernel/audit_fsnotify.c | 4 ++--
kernel/audit_tree.c | 4 ++--
kernel/audit_watch.c | 4 ++--
12 files changed, 42 insertions(+), 35 deletions(-)
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index eb8ee2cbdb8f..7ff92308aa54 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -135,6 +135,7 @@ static void dnotify_free_mark(struct fsnotify_mark *fsn_mark)
static struct fsnotify_ops dnotify_fsnotify_ops = {
.handle_event = dnotify_handle_event,
+ .free_mark = dnotify_free_mark,
};
/*
@@ -305,7 +306,7 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
/* set up the new_fsn_mark and new_dn_mark */
new_fsn_mark = &new_dn_mark->fsn_mark;
- fsnotify_init_mark(new_fsn_mark, dnotify_group, dnotify_free_mark);
+ fsnotify_init_mark(new_fsn_mark, dnotify_group);
new_fsn_mark->mask = mask;
new_dn_mark->dn = NULL;
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index 98d7dc94d34c..9e2ce260c444 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -268,8 +268,14 @@ static void fanotify_free_event(struct fsnotify_event *fsn_event)
kmem_cache_free(fanotify_event_cachep, event);
}
+static void fanotify_free_mark(struct fsnotify_mark *fsn_mark)
+{
+ kmem_cache_free(fanotify_mark_cache, fsn_mark);
+}
+
const struct fsnotify_ops fanotify_fsnotify_ops = {
.handle_event = fanotify_handle_event,
.free_group_priv = fanotify_free_group_priv,
.free_event = fanotify_free_event,
+ .free_mark = fanotify_free_mark,
};
diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h
index 4500a74f8d38..4eb6f5efa282 100644
--- a/fs/notify/fanotify/fanotify.h
+++ b/fs/notify/fanotify/fanotify.h
@@ -2,6 +2,7 @@
#include <linux/path.h>
#include <linux/slab.h>
+extern struct kmem_cache *fanotify_mark_cache;
extern struct kmem_cache *fanotify_event_cachep;
extern struct kmem_cache *fanotify_perm_event_cachep;
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 4ba51b836a44..a1d5b121fdf8 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -40,7 +40,7 @@
extern const struct fsnotify_ops fanotify_fsnotify_ops;
-static struct kmem_cache *fanotify_mark_cache __read_mostly;
+struct kmem_cache *fanotify_mark_cache __read_mostly;
struct kmem_cache *fanotify_event_cachep __read_mostly;
struct kmem_cache *fanotify_perm_event_cachep __read_mostly;
@@ -444,11 +444,6 @@ static const struct file_operations fanotify_fops = {
.llseek = noop_llseek,
};
-static void fanotify_free_mark(struct fsnotify_mark *fsn_mark)
-{
- kmem_cache_free(fanotify_mark_cache, fsn_mark);
-}
-
static int fanotify_find_path(int dfd, const char __user *filename,
struct path *path, unsigned int flags)
{
@@ -627,7 +622,7 @@ static struct fsnotify_mark *fanotify_add_new_mark(struct fsnotify_group *group,
if (!mark)
return ERR_PTR(-ENOMEM);
- fsnotify_init_mark(mark, group, fanotify_free_mark);
+ fsnotify_init_mark(mark, group);
ret = fsnotify_add_mark_locked(mark, inode, mnt, 0);
if (ret) {
fsnotify_put_mark(mark);
diff --git a/fs/notify/inotify/inotify.h b/fs/notify/inotify/inotify.h
index 507840969edc..049e15da5564 100644
--- a/fs/notify/inotify/inotify.h
+++ b/fs/notify/inotify/inotify.h
@@ -31,3 +31,5 @@ extern int inotify_handle_event(struct fsnotify_group *group,
int *srcu_idx);
extern const struct fsnotify_ops inotify_fsnotify_ops;
+
+extern struct kmem_cache *inotify_inode_mark_cachep;
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index 35f2f39514b8..a33aa3173a2d 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -177,9 +177,20 @@ static void inotify_free_event(struct fsnotify_event *fsn_event)
kfree(INOTIFY_E(fsn_event));
}
+/* ding dong the mark is dead */
+static void inotify_free_mark(struct fsnotify_mark *fsn_mark)
+{
+ struct inotify_inode_mark *i_mark;
+
+ i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
+
+ kmem_cache_free(inotify_inode_mark_cachep, i_mark);
+}
+
const struct fsnotify_ops inotify_fsnotify_ops = {
.handle_event = inotify_handle_event,
.free_group_priv = inotify_free_group_priv,
.free_event = inotify_free_event,
.freeing_mark = inotify_freeing_mark,
+ .free_mark = inotify_free_mark,
};
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 38e66d497b3b..f16d591f0b41 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -49,7 +49,7 @@ static int inotify_max_user_instances __read_mostly;
static int inotify_max_queued_events __read_mostly;
static int inotify_max_user_watches __read_mostly;
-static struct kmem_cache *inotify_inode_mark_cachep __read_mostly;
+struct kmem_cache *inotify_inode_mark_cachep __read_mostly;
#ifdef CONFIG_SYSCTL
@@ -486,16 +486,6 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
atomic_dec(&group->inotify_data.user->inotify_watches);
}
-/* ding dong the mark is dead */
-static void inotify_free_mark(struct fsnotify_mark *fsn_mark)
-{
- struct inotify_inode_mark *i_mark;
-
- i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
-
- kmem_cache_free(inotify_inode_mark_cachep, i_mark);
-}
-
static int inotify_update_existing_watch(struct fsnotify_group *group,
struct inode *inode,
u32 arg)
@@ -561,7 +551,7 @@ static int inotify_new_watch(struct fsnotify_group *group,
if (unlikely(!tmp_i_mark))
return -ENOMEM;
- fsnotify_init_mark(&tmp_i_mark->fsn_mark, group, inotify_free_mark);
+ fsnotify_init_mark(&tmp_i_mark->fsn_mark, group);
tmp_i_mark->fsn_mark.mask = mask;
tmp_i_mark->wd = -1;
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index fae0c69c8cae..63449d155f78 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -197,9 +197,12 @@ static struct inode *fsnotify_detach_connector_from_object(
static void fsnotify_final_mark_destroy(struct fsnotify_mark *mark)
{
- if (mark->group)
- fsnotify_put_group(mark->group);
- mark->free_mark(mark);
+ struct fsnotify_group *group = mark->group;
+
+ if (WARN_ON_ONCE(!group))
+ return;
+ group->ops->free_mark(mark);
+ fsnotify_put_group(group);
}
void fsnotify_put_mark(struct fsnotify_mark *mark)
@@ -718,13 +721,11 @@ void fsnotify_destroy_marks(struct fsnotify_mark_connector **connp)
* Nothing fancy, just initialize lists and locks and counters.
*/
void fsnotify_init_mark(struct fsnotify_mark *mark,
- struct fsnotify_group *group,
- void (*free_mark)(struct fsnotify_mark *mark))
+ struct fsnotify_group *group)
{
memset(mark, 0, sizeof(*mark));
spin_lock_init(&mark->lock);
atomic_set(&mark->refcnt, 1);
- mark->free_mark = free_mark;
fsnotify_get_group(group);
mark->group = group;
}
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index f87d447c1457..0239741b0dc8 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -102,6 +102,8 @@ struct fsnotify_ops {
void (*free_group_priv)(struct fsnotify_group *group);
void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
void (*free_event)(struct fsnotify_event *event);
+ /* called on final put+free to free memory */
+ void (*free_mark)(struct fsnotify_mark *mark);
};
/*
@@ -259,7 +261,6 @@ struct fsnotify_mark {
#define FSNOTIFY_MARK_FLAG_ALIVE 0x02
#define FSNOTIFY_MARK_FLAG_ATTACHED 0x04
unsigned int flags; /* flags [mark->lock] */
- void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */
};
#ifdef CONFIG_FSNOTIFY
@@ -339,8 +340,7 @@ extern struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group
/* Calculate mask of events for a list of marks */
extern void fsnotify_recalc_mask(struct fsnotify_mark_connector *conn);
extern void fsnotify_init_mark(struct fsnotify_mark *mark,
- struct fsnotify_group *group,
- void (*free_mark)(struct fsnotify_mark *mark));
+ struct fsnotify_group *group);
/* Find mark belonging to given group in the list of marks */
extern struct fsnotify_mark *fsnotify_find_mark(
struct fsnotify_mark_connector **connp,
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c
index 5bb7e920f126..7c724b59fe7d 100644
--- a/kernel/audit_fsnotify.c
+++ b/kernel/audit_fsnotify.c
@@ -103,8 +103,7 @@ struct audit_fsnotify_mark *audit_alloc_mark(struct audit_krule *krule, char *pa
goto out;
}
- fsnotify_init_mark(&audit_mark->mark, audit_fsnotify_group,
- audit_fsnotify_free_mark);
+ fsnotify_init_mark(&audit_mark->mark, audit_fsnotify_group);
audit_mark->mark.mask = AUDIT_FS_EVENTS;
audit_mark->path = pathname;
audit_update_mark(audit_mark, dentry->d_inode);
@@ -203,6 +202,7 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
static const struct fsnotify_ops audit_mark_fsnotify_ops = {
.handle_event = audit_mark_handle_event,
+ .free_mark = audit_fsnotify_free_mark,
};
static int __init audit_fsnotify_init(void)
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index a799cea717de..b625908b835c 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -154,8 +154,7 @@ static struct audit_chunk *alloc_chunk(int count)
INIT_LIST_HEAD(&chunk->owners[i].list);
chunk->owners[i].index = i;
}
- fsnotify_init_mark(&chunk->mark, audit_tree_group,
- audit_tree_destroy_watch);
+ fsnotify_init_mark(&chunk->mark, audit_tree_group);
chunk->mark.mask = FS_IN_IGNORED;
return chunk;
}
@@ -1003,6 +1002,7 @@ static void audit_tree_freeing_mark(struct fsnotify_mark *entry, struct fsnotify
static const struct fsnotify_ops audit_tree_ops = {
.handle_event = audit_tree_handle_event,
.freeing_mark = audit_tree_freeing_mark,
+ .free_mark = audit_tree_destroy_watch,
};
static int __init audit_tree_init(void)
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index 0f355086215a..d32b68b10cf7 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -157,8 +157,7 @@ static struct audit_parent *audit_init_parent(struct path *path)
INIT_LIST_HEAD(&parent->watches);
- fsnotify_init_mark(&parent->mark, audit_watch_group,
- audit_watch_free_mark);
+ fsnotify_init_mark(&parent->mark, audit_watch_group);
parent->mark.mask = AUDIT_FS_WATCH;
ret = fsnotify_add_mark(&parent->mark, inode, NULL, 0);
if (ret < 0) {
@@ -508,6 +507,7 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
static const struct fsnotify_ops audit_watch_fsnotify_ops = {
.handle_event = audit_watch_handle_event,
+ .free_mark = audit_watch_free_mark,
};
static int __init audit_watch_init(void)
--
2.10.2
--
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