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authorDavid Howells <dhowells@redhat.com>2012-12-20 21:52:33 +0000
committerDavid Howells <dhowells@redhat.com>2012-12-20 21:58:25 +0000
commit0f972b5696c0a0677a9b3a18fee45cc0e8de4184 (patch)
tree3cde9016353e20e4c52cc01a652bb87461809520 /fs/fscache
parent5f4f9f4af185d5e76c966d2d3420a61870c856e7 (diff)
FS-Cache: Check that there are no read ops when cookie relinquished
Check that the netfs isn't trying to relinquish a cookie that still has read operations in progress upon it. If there are, then give log a warning and BUG. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/fscache')
-rw-r--r--fs/fscache/cookie.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index 990535071a8a..0666996adf80 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -452,6 +452,14 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, int retire)
_debug("RELEASE OBJ%x", object->debug_id);
+ if (atomic_read(&object->n_reads)) {
+ spin_unlock(&cookie->lock);
+ printk(KERN_ERR "FS-Cache:"
+ " Cookie '%s' still has %d outstanding reads\n",
+ cookie->def->name, atomic_read(&object->n_reads));
+ BUG();
+ }
+
/* detach each cache object from the object cookie */
spin_lock(&object->lock);
hlist_del_init(&object->cookie_link);