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pNFS/flexfiles: Record resend attempts on I/O failure 

If the attempt to do pNFS fails, then record what action we
take to recover (resend, reset to pnfs or reset to mds).

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2020-01-06 15:25:07 -05:00 committed by Anna Schumaker
parent 118b629219
commit 0722dc9fea
3 changed files with 14 additions and 8 deletions
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6
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1321,7 +1321,6 @@ static int ff_layout_read_done_cb(struct rpc_task *task,
int new_idx = hdr->pgio_mirror_idx;
int err;
trace_nfs4_pnfs_read(hdr, task->tk_status);
if (task->tk_status < 0)
ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
hdr->args.offset, hdr->args.count,
@ -1331,6 +1330,7 @@ static int ff_layout_read_done_cb(struct rpc_task *task,
hdr->ds_clp, hdr->lseg,
hdr->pgio_mirror_idx);
trace_nfs4_pnfs_read(hdr, err);
clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
switch (err) {
@ -1494,7 +1494,6 @@ static int ff_layout_write_done_cb(struct rpc_task *task,
loff_t end_offs = 0;
int err;
trace_nfs4_pnfs_write(hdr, task->tk_status);
if (task->tk_status < 0)
ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
hdr->args.offset, hdr->args.count,
@ -1504,6 +1503,7 @@ static int ff_layout_write_done_cb(struct rpc_task *task,
hdr->ds_clp, hdr->lseg,
hdr->pgio_mirror_idx);
trace_nfs4_pnfs_write(hdr, err);
clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
switch (err) {
@ -1537,7 +1537,6 @@ static int ff_layout_commit_done_cb(struct rpc_task *task,
{
int err;
trace_nfs4_pnfs_commit_ds(data, task->tk_status);
if (task->tk_status < 0)
ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
data->args.offset, data->args.count,
@ -1546,6 +1545,7 @@ static int ff_layout_commit_done_cb(struct rpc_task *task,
err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
data->lseg, data->ds_commit_index);
trace_nfs4_pnfs_commit_ds(data, err);
switch (err) {
case -NFS4ERR_RESET_TO_PNFS:
pnfs_generic_prepare_to_resend_writes(data);

8
fs/nfs/nfs4trace.h
View File

@ -155,6 +155,9 @@ TRACE_DEFINE_ENUM(NFS4ERR_WRONG_CRED);
TRACE_DEFINE_ENUM(NFS4ERR_WRONG_TYPE);
TRACE_DEFINE_ENUM(NFS4ERR_XDEV);
TRACE_DEFINE_ENUM(NFS4ERR_RESET_TO_MDS);
TRACE_DEFINE_ENUM(NFS4ERR_RESET_TO_PNFS);
#define show_nfsv4_errors(error) \
__print_symbolic(error, \
{ NFS4_OK, "OK" }, \
@ -305,7 +308,10 @@ TRACE_DEFINE_ENUM(NFS4ERR_XDEV);
{ NFS4ERR_WRONGSEC, "WRONGSEC" }, \
{ NFS4ERR_WRONG_CRED, "WRONG_CRED" }, \
{ NFS4ERR_WRONG_TYPE, "WRONG_TYPE" }, \
{ NFS4ERR_XDEV, "XDEV" })
{ NFS4ERR_XDEV, "XDEV" }, \
/* ***** Internal to Linux NFS client ***** */ \
{ NFS4ERR_RESET_TO_MDS, "RESET_TO_MDS" }, \
{ NFS4ERR_RESET_TO_PNFS, "RESET_TO_PNFS" })
#define show_open_flags(flags) \
__print_flags(flags, "|", \

8
fs/nfs/pnfs.h
View File

@ -79,6 +79,10 @@ enum pnfs_try_status {
PNFS_TRY_AGAIN = 2,
};
/* error codes for internal use */
#define NFS4ERR_RESET_TO_MDS 12001
#define NFS4ERR_RESET_TO_PNFS 12002
#ifdef CONFIG_NFS_V4_1
#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
@ -91,10 +95,6 @@ enum pnfs_try_status {
#define NFS4_DEF_DS_RETRANS 5
#define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ)
/* error codes for internal use */
#define NFS4ERR_RESET_TO_MDS 12001
#define NFS4ERR_RESET_TO_PNFS 12002
enum {
NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */