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pnfs: recoalesce when ld write pagelist fails 

For pnfs pagelist write failure, we need to pg_recoalesce and resend IO to
mds.

Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Cc: stable@kernel.org [3.0]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Peng Tao 2011-09-22 21:50:14 -04:00 committed by Trond Myklebust
parent 1b0ae06877
commit 8ce160c5ef
3 changed files with 32 additions and 15 deletions
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20
fs/nfs/pnfs.c
View File

@ -1168,23 +1168,17 @@ EXPORT_SYMBOL_GPL(pnfs_generic_pg_test);
/*
* Called by non rpc-based layout drivers
*/
int
pnfs_ld_write_done(struct nfs_write_data *data)
void pnfs_ld_write_done(struct nfs_write_data *data)
{
int status;
if (!data->pnfs_error) {
if (likely(!data->pnfs_error)) {
pnfs_set_layoutcommit(data);
data->mds_ops->rpc_call_done(&data->task, data);
data->mds_ops->rpc_release(data);
return 0;
} else {
put_lseg(data->lseg);
data->lseg = NULL;
dprintk("pnfs write error = %d\n", data->pnfs_error);
}
dprintk("%s: pnfs_error=%d, retry via MDS\n", __func__,
data->pnfs_error);
status = nfs_initiate_write(data, NFS_CLIENT(data->inode),
data->mds_ops, NFS_FILE_SYNC);
return status ? : -EAGAIN;
data->mds_ops->rpc_release(data);
}
EXPORT_SYMBOL_GPL(pnfs_ld_write_done);

2
fs/nfs/pnfs.h
View File

@ -201,7 +201,7 @@ void pnfs_set_layoutcommit(struct nfs_write_data *wdata);
void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
int _pnfs_return_layout(struct inode *);
int pnfs_ld_write_done(struct nfs_write_data *);
void pnfs_ld_write_done(struct nfs_write_data *);
int pnfs_ld_read_done(struct nfs_read_data *);
struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
struct nfs_open_context *ctx,

25
fs/nfs/write.c
View File

@ -1166,7 +1166,13 @@ static void nfs_writeback_done_full(struct rpc_task *task, void *calldata)
static void nfs_writeback_release_full(void *calldata)
{
struct nfs_write_data *data = calldata;
int status = data->task.tk_status;
int ret, status = data->task.tk_status;
struct nfs_pageio_descriptor pgio;
if (data->pnfs_error) {
nfs_pageio_init_write_mds(&pgio, data->inode, FLUSH_STABLE);
pgio.pg_recoalesce = 1;
}
/* Update attributes as result of writeback. */
while (!list_empty(&data->pages)) {
@ -1182,6 +1188,11 @@ static void nfs_writeback_release_full(void *calldata)
req->wb_bytes,
(long long)req_offset(req));
if (data->pnfs_error) {
dprintk(", pnfs error = %d\n", data->pnfs_error);
goto next;
}
if (status < 0) {
nfs_set_pageerror(page);
nfs_context_set_write_error(req->wb_context, status);
@ -1201,7 +1212,19 @@ remove_request:
next:
nfs_clear_page_tag_locked(req);
nfs_end_page_writeback(page);
if (data->pnfs_error) {
lock_page(page);
nfs_pageio_cond_complete(&pgio, page->index);
ret = nfs_page_async_flush(&pgio, page, 0);
if (ret) {
nfs_set_pageerror(page);
dprintk("rewrite to MDS error = %d\n", ret);
}
unlock_page(page);
}
}
if (data->pnfs_error)
nfs_pageio_complete(&pgio);
nfs_writedata_release(calldata);
}