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fsnotify: Add group pointer in fsnotify_init_mark()

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Currently we initialize mark->group only in fsnotify_add_mark_lock().
However we will need to access fsnotify_ops of corresponding group from
fsnotify_put_mark() so we need mark->group initialized earlier. Do that
in fsnotify_init_mark() which has a consequence that once
fsnotify_init_mark() is called on a mark, the mark has to be destroyed
by fsnotify_put_mark().

Reviewed-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2016-12-21 18:32:48 +01:00
parent ebb3b47e37
commit 7b12932340
8 changed files with 38 additions and 32 deletions
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12
include/linux/fsnotify_backend.h
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@ -340,15 +340,17 @@ 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, void (*free_mark)(struct fsnotify_mark *mark));
extern void fsnotify_init_mark(struct fsnotify_mark *mark,
struct fsnotify_group *group,
void (*free_mark)(struct fsnotify_mark *mark));
/* Find mark belonging to given group in the list of marks */
extern struct fsnotify_mark *fsnotify_find_mark(
struct fsnotify_mark_connector __rcu **connp,
struct fsnotify_group *group);
/* attach the mark to both the group and the inode */
extern int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group,
struct inode *inode, struct vfsmount *mnt, int allow_dups);
extern int fsnotify_add_mark_locked(struct fsnotify_mark *mark, struct fsnotify_group *group,
/* attach the mark to the inode or vfsmount */
extern int fsnotify_add_mark(struct fsnotify_mark *mark, struct inode *inode,
struct vfsmount *mnt, int allow_dups);
extern int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
struct inode *inode, struct vfsmount *mnt, int allow_dups);
/* given a group and a mark, flag mark to be freed when all references are dropped */
extern void fsnotify_destroy_mark(struct fsnotify_mark *mark,