diff options
| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2016-11-18 15:21:30 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-19 20:17:22 +0100 |
| commit | 8ff851bf2240d877aaeec92795142535e07c3328 (patch) | |
| tree | 029166a41d4ff83ee80affa23c6fe67ac89aa2a8 | |
| parent | 7aae6e3c0c529e736d45322d7ad97cef33d63120 (diff) | |
pNFS: Fix race in pnfs_wait_on_layoutreturn
commit ee284e35d8c71bf5d4d807eaff6f67a17134b359 upstream.
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@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/nfs/pnfs.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 5cd3568eea06..3cae0726c1b1 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1185,13 +1185,11 @@ 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; } |