We must put the task to sleep while holding the inode->i_lock in order
to ensure atomicity with the test for NFS_LAYOUT_RETURN.
Fixes: 500d701f336b ("NFS41: make close wait for layoutreturn")
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
fs/nfs/pnfs.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 06bfcd277006..e17d9ec82ca7 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1257,13 +1257,11 @@ bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
* i_lock */
spin_lock(&ino->i_lock);
lo = nfsi->layout;
- if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
+ if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) {
+ rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL);
sleep = true;
+ }
spin_unlock(&ino->i_lock);
-
- if (sleep)
- rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL);
-
return sleep;
}
--
2.9.3
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
