diff mbox

[v3,1/2] FSCACHE: Increase reference of parent after registering, netfs success

Message ID 552BC630.20906@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kinglong Mee April 13, 2015, 1:35 p.m. UTC 
If netfs exist, fscache should not increase the reference of parent's
usage and n_children, otherwise, never be decreased.

v2: thanks David's suggest,
 move increasing reference of parent if success
 use kmem_cache_free() freeing primary_index directly

v3: don't move "netfs->primary_index->parent = &fscache_fsdef_index;"

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
 fs/fscache/netfs.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

Comments

David Howells April 14, 2015, 9:34 a.m. UTC | #1 
Applied here:

	http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=fscache

David
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diff mbox

Patch

diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c
index 6d941f5..458cc96 100644
--- a/fs/fscache/netfs.c
+++ b/fs/fscache/netfs.c
@@ -47,9 +47,6 @@  int __fscache_register_netfs(struct fscache_netfs *netfs)
 	netfs->primary_index->netfs_data	= netfs;
 	netfs->primary_index->flags		= 1 << FSCACHE_COOKIE_ENABLED;
 
-	atomic_inc(&netfs->primary_index->parent->usage);
-	atomic_inc(&netfs->primary_index->parent->n_children);
-
 	spin_lock_init(&netfs->primary_index->lock);
 	INIT_HLIST_HEAD(&netfs->primary_index->backing_objects);
 
@@ -62,6 +59,9 @@  int __fscache_register_netfs(struct fscache_netfs *netfs)
 			goto already_registered;
 	}
 
+	atomic_inc(&netfs->primary_index->parent->usage);
+	atomic_inc(&netfs->primary_index->parent->n_children);
+
 	list_add(&netfs->link, &fscache_netfs_list);
 	ret = 0;
 
@@ -71,8 +71,7 @@  already_registered:
 	up_write(&fscache_addremove_sem);
 
 	if (ret < 0) {
-		netfs->primary_index->parent = NULL;
-		__fscache_cookie_put(netfs->primary_index);
+		kmem_cache_free(fscache_cookie_jar, netfs->primary_index);
 		netfs->primary_index = NULL;
 	}