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| author | Anna Schumaker <Anna.Schumaker@netapp.com> | 2014-09-03 20:15:40 +0200 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-09-10 21:47:00 +0200 |
| commit | 61beef75cc5bae119e500c9f25daad8596c7cbe4 (patch) | |
| tree | b274ddc0b8fb3387e7a10b9aaa9b2f5850b79f7f /fs/nfs/nfs4proc.c | |
| parent | rpc: xs_bind - do not bind when requesting a random ephemeral port (diff) | |
| download | linux-61beef75cc5bae119e500c9f25daad8596c7cbe4.tar.xz linux-61beef75cc5bae119e500c9f25daad8596c7cbe4.zip | |
NFS: Clear up state owner lock usage
can_open_cached() reads values out of the state structure, meaning that
we need the so_lock to have a correct return value. As a bonus, this
helps clear up some potentially confusing code.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/nfs4proc.c')
| -rw-r--r-- | fs/nfs/nfs4proc.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 7dd8aca31c29..18eb31c1ea0b 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1307,15 +1307,13 @@ static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) int ret = -EAGAIN; for (;;) { + spin_lock(&state->owner->so_lock); if (can_open_cached(state, fmode, open_mode)) { - spin_lock(&state->owner->so_lock); - if (can_open_cached(state, fmode, open_mode)) { - update_open_stateflags(state, fmode); - spin_unlock(&state->owner->so_lock); - goto out_return_state; - } + update_open_stateflags(state, fmode); spin_unlock(&state->owner->so_lock); + goto out_return_state; } + spin_unlock(&state->owner->so_lock); rcu_read_lock(); delegation = rcu_dereference(nfsi->delegation); if (!can_open_delegated(delegation, fmode)) { |