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Commit 9e1c7432 authored by Eric Paris's avatar Eric Paris
Browse files

fsnotify: duplicate fsnotify_mark_entry data between 2 marks 



Simple copy fsnotify information from one mark to another in preparation
for the second mark to replace the first.

Signed-off-by: default avatarEric Paris <eparis@redhat.com>
parent a05fb6cc

fs/notify/inode_mark.c

+9 −1
Original line number Diff line number Diff line
@@ -282,12 +282,20 @@ struct fsnotify_mark_entry *fsnotify_find_mark_entry(struct fsnotify_group *grou 
	return NULL;

}



void fsnotify_duplicate_mark(struct fsnotify_mark_entry *new, struct fsnotify_mark_entry *old)

{

	assert_spin_locked(&old->lock);

	new->inode = old->inode;

	new->group = old->group;

	new->mask = old->mask;

	new->free_mark = old->free_mark;

}



/*

 * Nothing fancy, just initialize lists and locks and counters.

 */

void fsnotify_init_mark(struct fsnotify_mark_entry *entry,

			void (*free_mark)(struct fsnotify_mark_entry *entry))



{

	spin_lock_init(&entry->lock);

	atomic_set(&entry->refcnt, 1);

include/linux/fsnotify_backend.h

+2 −0
Original line number Diff line number Diff line
@@ -342,6 +342,8 @@ extern void fsnotify_recalc_inode_mask(struct inode *inode); 
extern void fsnotify_init_mark(struct fsnotify_mark_entry *entry, void (*free_mark)(struct fsnotify_mark_entry *entry));

/* find (and take a reference) to a mark associated with group and inode */

extern struct fsnotify_mark_entry *fsnotify_find_mark_entry(struct fsnotify_group *group, struct inode *inode);

/* copy the values from old into new */

extern void fsnotify_duplicate_mark(struct fsnotify_mark_entry *new, struct fsnotify_mark_entry *old);

/* attach the mark to both the group and the inode */

extern int fsnotify_add_mark(struct fsnotify_mark_entry *entry, struct fsnotify_group *group, struct inode *inode);

/* given a mark, flag it to be freed when all references are dropped */