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Diffstat (limited to 'fs/notify/inotify/inotify_user.c')
-rw-r--r--fs/notify/inotify/inotify_user.c81
1 files changed, 25 insertions, 56 deletions
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 498d609b26c7..7cc7d3fb1862 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -47,7 +47,7 @@
/* configurable via /proc/sys/fs/inotify/ */
static int inotify_max_queued_events __read_mostly;
-static struct kmem_cache *inotify_inode_mark_cachep __read_mostly;
+struct kmem_cache *inotify_inode_mark_cachep __read_mostly;
#ifdef CONFIG_SYSCTL
@@ -395,21 +395,6 @@ static struct inotify_inode_mark *inotify_idr_find(struct fsnotify_group *group,
return i_mark;
}
-static void do_inotify_remove_from_idr(struct fsnotify_group *group,
- struct inotify_inode_mark *i_mark)
-{
- struct idr *idr = &group->inotify_data.idr;
- spinlock_t *idr_lock = &group->inotify_data.idr_lock;
- int wd = i_mark->wd;
-
- assert_spin_locked(idr_lock);
-
- idr_remove(idr, wd);
-
- /* removed from the idr, drop that ref */
- fsnotify_put_mark(&i_mark->fsn_mark);
-}
-
/*
* Remove the mark from the idr (if present) and drop the reference
* on the mark because it was in the idr.
@@ -417,6 +402,7 @@ static void do_inotify_remove_from_idr(struct fsnotify_group *group,
static void inotify_remove_from_idr(struct fsnotify_group *group,
struct inotify_inode_mark *i_mark)
{
+ struct idr *idr = &group->inotify_data.idr;
spinlock_t *idr_lock = &group->inotify_data.idr_lock;
struct inotify_inode_mark *found_i_mark = NULL;
int wd;
@@ -429,18 +415,16 @@ static void inotify_remove_from_idr(struct fsnotify_group *group,
* if it wasn't....
*/
if (wd == -1) {
- WARN_ONCE(1, "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p"
- " i_mark->inode=%p\n", __func__, i_mark, i_mark->wd,
- i_mark->fsn_mark.group, i_mark->fsn_mark.inode);
+ WARN_ONCE(1, "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p\n",
+ __func__, i_mark, i_mark->wd, i_mark->fsn_mark.group);
goto out;
}
/* Lets look in the idr to see if we find it */
found_i_mark = inotify_idr_find_locked(group, wd);
if (unlikely(!found_i_mark)) {
- WARN_ONCE(1, "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p"
- " i_mark->inode=%p\n", __func__, i_mark, i_mark->wd,
- i_mark->fsn_mark.group, i_mark->fsn_mark.inode);
+ WARN_ONCE(1, "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p\n",
+ __func__, i_mark, i_mark->wd, i_mark->fsn_mark.group);
goto out;
}
@@ -451,35 +435,33 @@ static void inotify_remove_from_idr(struct fsnotify_group *group,
*/
if (unlikely(found_i_mark != i_mark)) {
WARN_ONCE(1, "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p "
- "mark->inode=%p found_i_mark=%p found_i_mark->wd=%d "
- "found_i_mark->group=%p found_i_mark->inode=%p\n",
- __func__, i_mark, i_mark->wd, i_mark->fsn_mark.group,
- i_mark->fsn_mark.inode, found_i_mark, found_i_mark->wd,
- found_i_mark->fsn_mark.group,
- found_i_mark->fsn_mark.inode);
+ "found_i_mark=%p found_i_mark->wd=%d "
+ "found_i_mark->group=%p\n", __func__, i_mark,
+ i_mark->wd, i_mark->fsn_mark.group, found_i_mark,
+ found_i_mark->wd, found_i_mark->fsn_mark.group);
goto out;
}
/*
* One ref for being in the idr
- * one ref held by the caller trying to kill us
* one ref grabbed by inotify_idr_find
*/
- if (unlikely(atomic_read(&i_mark->fsn_mark.refcnt) < 3)) {
- printk(KERN_ERR "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p"
- " i_mark->inode=%p\n", __func__, i_mark, i_mark->wd,
- i_mark->fsn_mark.group, i_mark->fsn_mark.inode);
+ if (unlikely(atomic_read(&i_mark->fsn_mark.refcnt) < 2)) {
+ printk(KERN_ERR "%s: i_mark=%p i_mark->wd=%d i_mark->group=%p\n",
+ __func__, i_mark, i_mark->wd, i_mark->fsn_mark.group);
/* we can't really recover with bad ref cnting.. */
BUG();
}
- do_inotify_remove_from_idr(group, i_mark);
+ idr_remove(idr, wd);
+ /* Removed from the idr, drop that ref. */
+ fsnotify_put_mark(&i_mark->fsn_mark);
out:
+ i_mark->wd = -1;
+ spin_unlock(idr_lock);
/* match the ref taken by inotify_idr_find_locked() */
if (found_i_mark)
fsnotify_put_mark(&found_i_mark->fsn_mark);
- i_mark->wd = -1;
- spin_unlock(idr_lock);
}
/*
@@ -492,7 +474,7 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
/* Queue ignore event for the watch */
inotify_handle_event(group, NULL, fsn_mark, NULL, FS_IN_IGNORED,
- NULL, FSNOTIFY_EVENT_NONE, NULL, 0);
+ NULL, FSNOTIFY_EVENT_NONE, NULL, 0, NULL);
i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
/* remove this mark from the idr */
@@ -501,16 +483,6 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
dec_inotify_watches(group->inotify_data.ucounts);
}
-/* 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)
@@ -524,21 +496,19 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
mask = inotify_arg_to_mask(arg);
- fsn_mark = fsnotify_find_inode_mark(group, inode);
+ fsn_mark = fsnotify_find_mark(&inode->i_fsnotify_marks, group);
if (!fsn_mark)
return -ENOENT;
i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
spin_lock(&fsn_mark->lock);
-
old_mask = fsn_mark->mask;
if (add)
- fsnotify_set_mark_mask_locked(fsn_mark, (fsn_mark->mask | mask));
+ fsn_mark->mask |= mask;
else
- fsnotify_set_mark_mask_locked(fsn_mark, mask);
+ fsn_mark->mask = mask;
new_mask = fsn_mark->mask;
-
spin_unlock(&fsn_mark->lock);
if (old_mask != new_mask) {
@@ -549,7 +519,7 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
/* update the inode with this new fsn_mark */
if (dropped || do_inode)
- fsnotify_recalc_inode_mask(inode);
+ fsnotify_recalc_mask(inode->i_fsnotify_marks);
}
@@ -578,7 +548,7 @@ static int inotify_new_watch(struct fsnotify_group *group,
if (unlikely(!tmp_i_mark))
return -ENOMEM;
- fsnotify_init_mark(&tmp_i_mark->fsn_mark, inotify_free_mark);
+ fsnotify_init_mark(&tmp_i_mark->fsn_mark, group);
tmp_i_mark->fsn_mark.mask = mask;
tmp_i_mark->wd = -1;
@@ -594,8 +564,7 @@ static int inotify_new_watch(struct fsnotify_group *group,
}
/* we are on the idr, now get on the inode */
- ret = fsnotify_add_mark_locked(&tmp_i_mark->fsn_mark, group, inode,
- NULL, 0);
+ ret = fsnotify_add_mark_locked(&tmp_i_mark->fsn_mark, inode, NULL, 0);
if (ret) {
/* we failed to get on the inode, get off the idr */
inotify_remove_from_idr(group, tmp_i_mark);