[PATCH 4.7 097/186] pNFS: Fix LAYOUTGET handling of NFS4ERR_BAD_STATEID and NFS4ERR_EXPIRED
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-08-18 14:13:20
Also in:
lkml
4.7-stable review patch. If anyone has any objections, please let me know.
------------------
From: Trond Myklebust <redacted>
commit f7db0b283868411dc6bc8a223fd032b211d2d91f upstream.
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: 183d9e7b112aa ("pnfs: rework LAYOUTGET retry handling")
Signed-off-by: Trond Myklebust <redacted>
Reviewed-by: Jeff Layton <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/nfs/nfs4proc.c | 32 ++++++++++++++------------------
1 file changed, 14 insertions(+), 18 deletions(-)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c@@ -7872,6 +7872,7 @@ nfs4_layoutget_handle_exception(struct r 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);
@@ -7916,30 +7917,25 @@ nfs4_layoutget_handle_exception(struct r 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); - spin_unlock(&inode->i_lock); - pnfs_free_lseg_list(&head); - status = -EAGAIN; - goto out; - } else - spin_unlock(&inode->i_lock); + /* + * Mark the bad layout state as invalid, then retry + */ + set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); + pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0); + spin_unlock(&inode->i_lock); + pnfs_free_lseg_list(&head); + status = -EAGAIN; + goto out; } err = nfs4_handle_exception(server, nfs4err, exception);