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Revert "NFSv4/flexfiles: Abort I/O early if the layout segment was invalidated" 

This reverts commit a79f194aa4.
The mechanism for aborting I/O is racy, since we are not guaranteed that
the request is asleep while we're changing both task->tk_status and
task->tk_action.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v5.1
This commit is contained in:
Trond Myklebust 2019-08-16 08:37:26 -04:00
parent 80f455da6c
commit d5711920ec
3 changed files with 0 additions and 25 deletions
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17
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1148,8 +1148,6 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task,
break;
case -NFS4ERR_RETRY_UNCACHED_REP:
break;
case -EAGAIN:
return -NFS4ERR_RESET_TO_PNFS;
/* Invalidate Layout errors */
case -NFS4ERR_PNFS_NO_LAYOUT:
case -ESTALE: /* mapped NFS4ERR_STALE */
@ -1210,7 +1208,6 @@ static int ff_layout_async_handle_error_v3(struct rpc_task *task,
case -EBADHANDLE:
case -ELOOP:
case -ENOSPC:
case -EAGAIN:
break;
case -EJUKEBOX:
nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
@ -1445,16 +1442,6 @@ static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
ff_layout_read_prepare_common(task, hdr);
}
static void
ff_layout_io_prepare_transmit(struct rpc_task *task,
void *data)
{
struct nfs_pgio_header *hdr = data;
if (!pnfs_is_valid_lseg(hdr->lseg))
rpc_exit(task, -EAGAIN);
}
static void ff_layout_read_call_done(struct rpc_task *task, void *data)
{
struct nfs_pgio_header *hdr = data;
@ -1740,7 +1727,6 @@ static void ff_layout_commit_release(void *data)
static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
.rpc_call_prepare = ff_layout_read_prepare_v3,
.rpc_call_prepare_transmit = ff_layout_io_prepare_transmit,
.rpc_call_done = ff_layout_read_call_done,
.rpc_count_stats = ff_layout_read_count_stats,
.rpc_release = ff_layout_read_release,
@ -1748,7 +1734,6 @@ static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
.rpc_call_prepare = ff_layout_read_prepare_v4,
.rpc_call_prepare_transmit = ff_layout_io_prepare_transmit,
.rpc_call_done = ff_layout_read_call_done,
.rpc_count_stats = ff_layout_read_count_stats,
.rpc_release = ff_layout_read_release,
@ -1756,7 +1741,6 @@ static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
.rpc_call_prepare = ff_layout_write_prepare_v3,
.rpc_call_prepare_transmit = ff_layout_io_prepare_transmit,
.rpc_call_done = ff_layout_write_call_done,
.rpc_count_stats = ff_layout_write_count_stats,
.rpc_release = ff_layout_write_release,
@ -1764,7 +1748,6 @@ static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
.rpc_call_prepare = ff_layout_write_prepare_v4,
.rpc_call_prepare_transmit = ff_layout_io_prepare_transmit,
.rpc_call_done = ff_layout_write_call_done,
.rpc_count_stats = ff_layout_write_count_stats,
.rpc_release = ff_layout_write_release,

1
include/linux/sunrpc/sched.h
View File

@ -98,7 +98,6 @@ typedef void (*rpc_action)(struct rpc_task *);
struct rpc_call_ops {
void (*rpc_call_prepare)(struct rpc_task *, void *);
void (*rpc_call_prepare_transmit)(struct rpc_task *, void *);
void (*rpc_call_done)(struct rpc_task *, void *);
void (*rpc_count_stats)(struct rpc_task *, void *);
void (*rpc_release)(void *);

7
net/sunrpc/xprt.c
View File

@ -1408,13 +1408,6 @@ xprt_request_transmit(struct rpc_rqst *req, struct rpc_task *snd_task)
status = -EBADMSG;
goto out_dequeue;
}
if (task->tk_ops->rpc_call_prepare_transmit) {
task->tk_ops->rpc_call_prepare_transmit(task,
task->tk_calldata);
status = task->tk_status;
if (status < 0)
goto out_dequeue;
}
if (RPC_SIGNALLED(task)) {
status = -ERESTARTSYS;
goto out_dequeue;