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FS-Cache: Check that there are no read ops when cookie relinquished

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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>
This commit is contained in:
David Howells 2012-12-20 21:52:33 +00:00
parent 5f4f9f4af1
commit 0f972b5696
1 changed files with 8 additions and 0 deletions
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8
fs/fscache/cookie.c
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@ -452,6 +452,14 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, int retire)
_debug("RELEASE OBJ%x", object->debug_id); _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 */ /* detach each cache object from the object cookie */
spin_lock(&object->lock); spin_lock(&object->lock);
hlist_del_init(&object->cookie_link); hlist_del_init(&object->cookie_link);