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NFSv4/pnfs: Don't switch off layoutget-on-open for transient errors 

Ensure that we only switch off the LAYOUTGET operation in the OPEN
compound when the server is truly broken, and/or it is complaining
that the compound is too large.
Currently, we end up turning off the functionality permanently,
even for transient errors such as EACCES or ENOSPC.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
hifive-unleashed-5.1
Trond Myklebust 2017-02-01 21:02:07 -05:00 committed by Trond Myklebust
parent d49e0d5b99
commit 8dc96566c0
1 changed files with 15 additions and 7 deletions
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22
fs/nfs/pnfs.c
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@ -2111,14 +2111,22 @@ void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
dprintk("%s: entered with status %i\n", __func__, lgp->res.status);
if (lgp->res.status) {
switch (lgp->res.status) {
case -NFS4ERR_DELAY:
case -NFS4ERR_GRACE:
case -NFS4ERR_LAYOUTTRYLATER:
break;
default:
/* FIXME - Any error not listed above permanently
* halts lgopen attempts.
*/
break;
/*
* Halt lgopen attempts if the server doesn't recognise
* the "current stateid" value, the layout type, or the
* layoutget operation as being valid.
* Also if it complains about too many ops in the compound
* or of the request/reply being too big.
*/
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_NOTSUPP:
case -NFS4ERR_REP_TOO_BIG:
case -NFS4ERR_REP_TOO_BIG_TO_CACHE:
case -NFS4ERR_REQ_TOO_BIG:
case -NFS4ERR_TOO_MANY_OPS:
case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
srv->caps &= ~NFS_CAP_LGOPEN;
}
return;