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nfs: track whether server sets MAY_NOTIFY_LOCK flag 

We want to handle the two cases differently, such that we poll more
aggressively when we don't expect a callback.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Jeff Layton 2016-09-17 18:17:35 -04:00 committed by Anna Schumaker
parent eed7c4143d
commit a8ce377a5d
2 changed files with 3 additions and 0 deletions
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1
fs/nfs/nfs4_fs.h
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@ -157,6 +157,7 @@ enum {
NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */
NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */
NFS_STATE_RECOVERY_FAILED, /* OPEN stateid state recovery failed */
NFS_STATE_MAY_NOTIFY_LOCK, /* server may CB_NOTIFY_LOCK */
};
struct nfs4_state {

2
fs/nfs/nfs4proc.c
View File

@ -2537,6 +2537,8 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
goto out;
if (server->caps & NFS_CAP_POSIX_LOCK)
set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
dentry = opendata->dentry;
if (d_really_is_negative(dentry)) {