The NFSv4.1 protocol explicitly forbids us from using the zero stateid
together with layoutget, so when we see that nfs4_select_rw_stateid()
is unable to return a valid delegation, lock or open stateid, then
we should initiate recovery and retry.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
fs/nfs/nfs4state.c | 3 +--
fs/nfs/pnfs.c | 13 ++++++++++---
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index f32b02c2bc73..9afd051a4876 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1064,8 +1064,7 @@ int nfs4_select_rw_stateid(struct nfs4_state *state,
* choose to use.
*/
goto out;
- nfs4_copy_open_stateid(dst, state);
- ret = 0;
+ ret = nfs4_copy_open_stateid(dst, state) ? 0 : -EAGAIN;
out:
if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41))
dst->seqid = 0;
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 56e423cd8180..519b7221e7e8 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1915,6 +1915,7 @@ pnfs_update_layout(struct inode *ino,
* stateid.
*/
if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) {
+ int status;
/*
* The first layoutget for the file. Need to serialize per
@@ -1934,13 +1935,19 @@ pnfs_update_layout(struct inode *ino,
}
first = true;
- if (nfs4_select_rw_stateid(ctx->state,
+ status = nfs4_select_rw_stateid(ctx->state,
iomode == IOMODE_RW ? FMODE_WRITE : FMODE_READ,
- NULL, &stateid, NULL) != 0) {
+ NULL, &stateid, NULL);
+ if (status != 0) {
trace_pnfs_update_layout(ino, pos, count,
iomode, lo, lseg,
PNFS_UPDATE_LAYOUT_INVALID_OPEN);
- goto out_unlock;
+ if (status != -EAGAIN)
+ goto out_unlock;
+ nfs4_schedule_stateid_recovery(server, ctx->state);
+ pnfs_clear_first_layoutget(lo);
+ pnfs_put_layout_hdr(lo);
+ goto lookup_again;
}
} else {
nfs4_stateid_copy(&stateid, &lo->plh_stateid);
--
2.21.0
