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pNFS: Fix LAYOUTGET handling of NFS4ERR_BAD_STATEID and NFS4ERR_EXPIRED

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We want to recover the open stateid if there is no layout stateid
and/or the stateid argument matches an open stateid.
Otherwise throw out the existing layout and recover from scratch, as
the layout stateid is bad.

Fixes: 183d9e7b11 ("pnfs: rework LAYOUTGET retry handling")
Cc: stable@vger.kernel.org # 4.7
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
This commit is contained in:
Trond Myklebust 2016-07-14 15:14:02 -04:00
parent 66b53f3258
commit f7db0b2838
1 changed files with 14 additions and 18 deletions
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14
fs/nfs/nfs4proc.c
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@ -7886,6 +7886,7 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
struct pnfs_layout_hdr *lo;
int nfs4err = task->tk_status;
int err, status = 0;
LIST_HEAD(head);
dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
@ -7930,21 +7931,18 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
case -NFS4ERR_BAD_STATEID:
exception->timeout = 0;
spin_lock(&inode->i_lock);
if (nfs4_stateid_match(&lgp->args.stateid,
lo = NFS_I(inode)->layout;
/* If the open stateid was bad, then recover it. */
if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
nfs4_stateid_match_other(&lgp->args.stateid,
&lgp->args.ctx->state->stateid)) {
spin_unlock(&inode->i_lock);
/* If the open stateid was bad, then recover it. */
exception->state = lgp->args.ctx->state;
break;
}
lo = NFS_I(inode)->layout;
if (lo && !test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) &&
nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
LIST_HEAD(head);
/*
* Mark the bad layout state as invalid, then retry
* with the current stateid.
*/
set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0);
@ -7952,8 +7950,6 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
pnfs_free_lseg_list(&head);
status = -EAGAIN;
goto out;
} else
spin_unlock(&inode->i_lock);
}
err = nfs4_handle_exception(server, nfs4err, exception);