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OpenCloudOS-Kernel
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nfs: clean up rest of reqs when failing to add one 

If we fail to set up things before sending anything over wire,
we need to clean up the reqs that are still attached to the
IO descriptor.

Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Peng Tao 2015-12-05 01:59:56 +08:00 committed by Trond Myklebust
parent d600ad1f2b
commit c18b96a1b8
1 changed files with 14 additions and 3 deletions
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17
fs/nfs/pagelist.c
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@ -1126,6 +1126,7 @@ static int nfs_do_recoalesce(struct nfs_pageio_descriptor *desc)
static int nfs_pageio_add_request_mirror(struct nfs_pageio_descriptor *desc,
struct nfs_page *req)
{
struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
int ret;
do {
@ -1153,7 +1154,7 @@ int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
nfs_pageio_setup_mirroring(desc, req);
if (desc->pg_error < 0)
return 0;
goto out_failed;
for (midx = 0; midx < desc->pg_mirror_count; midx++) {
if (midx) {
@ -1170,7 +1171,8 @@ int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
if (IS_ERR(dupreq)) {
nfs_page_group_unlock(req);
return 0;
desc->pg_error = PTR_ERR(dupreq);
goto out_failed;
}
nfs_lock_request(dupreq);
@ -1183,10 +1185,19 @@ int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
if (nfs_pgio_has_mirroring(desc))
desc->pg_mirror_idx = midx;
if (!nfs_pageio_add_request_mirror(desc, dupreq))
return 0;
goto out_failed;
}
return 1;
out_failed:
/*
* We might have failed before sending any reqs over wire.
* clean up rest of the reqs in mirror pg_list
*/
if (desc->pg_error)
desc->pg_completion_ops->error_cleanup(&mirror->pg_list);
return 0;
}
/*