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pNFS/flexfiles: never nfs4_mark_deviceid_unavailable 

The flexfiles layout should never mark a device unavailable.

Move nfs4_mark_deviceid_unavailable out of nfs4_pnfs_ds_connect and call
directly from files layout where it's still needed.

The flexfiles driver still handles marked devices in error paths, but will
now print a rate limited warning.

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Weston Andros Adamson 2017-03-09 12:56:49 -05:00 committed by Anna Schumaker
parent a33e4b036d
commit da066f3f03
4 changed files with 31 additions and 10 deletions
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1
fs/nfs/filelayout/filelayoutdev.c
View File

@ -282,6 +282,7 @@ nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
dataserver_retrans, 4,
s->nfs_client->cl_minorversion);
if (status) {
nfs4_mark_deviceid_unavailable(devid);
ret = NULL;
goto out;
}

14
fs/nfs/flexfilelayout/flexfilelayout.h
View File

@ -175,7 +175,19 @@ ff_layout_no_read_on_rw(struct pnfs_layout_segment *lseg)
static inline bool
ff_layout_test_devid_unavailable(struct nfs4_deviceid_node *node)
{
return nfs4_test_deviceid_unavailable(node);
/*
* Flexfiles should never mark a DS unavailable, but if it does
* print a (ratelimited) warning as this can affect performance.
*/
if (nfs4_test_deviceid_unavailable(node)) {
u32 *p = (u32 *)node->deviceid.data;
pr_warn_ratelimited("NFS: flexfiles layout referencing an "
"unavailable device [%x%x%x%x]\n",
p[0], p[1], p[2], p[3]);
return true;
}
return false;
}
static inline int

2
fs/nfs/flexfilelayout/flexfilelayoutdev.c
View File

@ -421,11 +421,11 @@ nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
mirror->mirror_ds->ds_versions[0].wsize = max_payload;
goto out;
}
out_fail:
ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
mirror, lseg->pls_range.offset,
lseg->pls_range.length, NFS4ERR_NXIO,
OP_ILLEGAL, GFP_NOIO);
out_fail:
if (fail_return || !ff_layout_has_available_ds(lseg))
pnfs_error_mark_layout_for_return(ino, lseg);
ds = NULL;

24
fs/nfs/pnfs_nfs.c
View File

@ -751,9 +751,11 @@ int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
struct nfs4_deviceid_node *devid, unsigned int timeo,
unsigned int retrans, u32 version, u32 minor_version)
{
if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
int err = 0;
int err;
again:
err = 0;
if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
if (version == 3) {
err = _nfs4_pnfs_v3_ds_connect(mds_srv, ds, timeo,
retrans);
@ -766,23 +768,29 @@ int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
err = -EPROTONOSUPPORT;
}
if (err)
nfs4_mark_deviceid_unavailable(devid);
nfs4_clear_ds_conn_bit(ds);
} else {
nfs4_wait_ds_connect(ds);
/* what was waited on didn't connect AND didn't mark unavail */
if (!ds->ds_clp && !nfs4_test_deviceid_unavailable(devid))
goto again;
}
/*
* At this point the ds->ds_clp should be ready, but it might have
* hit an error.
*/
if (!ds->ds_clp || !nfs_client_init_is_complete(ds->ds_clp)) {
WARN_ON_ONCE(1);
return -EINVAL;
if (!err) {
if (!ds->ds_clp || !nfs_client_init_is_complete(ds->ds_clp)) {
WARN_ON_ONCE(ds->ds_clp ||
!nfs4_test_deviceid_unavailable(devid));
return -EINVAL;
}
err = nfs_client_init_status(ds->ds_clp);
}
return nfs_client_init_status(ds->ds_clp);
return err;
}
EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_connect);