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nfs: Fix a missed page unlock after pg_doio() 

We must check pg_error and call error_cleanup after any call to pg_doio.
Currently, we are skipping the unlock of a page if we encounter an error in
nfs_pageio_complete() before handing off the work to the RPC layer.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Benjamin Coddington 2018-10-18 15:01:48 -04:00 committed by Trond Myklebust
parent e732f4485a
commit fdbd1a2e4a
1 changed files with 21 additions and 19 deletions
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40
fs/nfs/pagelist.c
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@ -1110,6 +1110,20 @@ static int nfs_pageio_add_request_mirror(struct nfs_pageio_descriptor *desc,
return ret;
}
static void nfs_pageio_error_cleanup(struct nfs_pageio_descriptor *desc)
{
u32 midx;
struct nfs_pgio_mirror *mirror;
if (!desc->pg_error)
return;
for (midx = 0; midx < desc->pg_mirror_count; midx++) {
mirror = &desc->pg_mirrors[midx];
desc->pg_completion_ops->error_cleanup(&mirror->pg_list);
}
}
int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
struct nfs_page *req)
{
@ -1160,25 +1174,11 @@ int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
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) {
struct nfs_pgio_mirror *mirror;
void (*func)(struct list_head *);
/* remember fatal errors */
if (nfs_error_is_fatal(desc->pg_error))
nfs_context_set_write_error(req->wb_context,
desc->pg_error);
func = desc->pg_completion_ops->error_cleanup;
for (midx = 0; midx < desc->pg_mirror_count; midx++) {
mirror = &desc->pg_mirrors[midx];
func(&mirror->pg_list);
}
}
/* remember fatal errors */
if (nfs_error_is_fatal(desc->pg_error))
nfs_context_set_write_error(req->wb_context,
desc->pg_error);
nfs_pageio_error_cleanup(desc);
return 0;
}
@ -1250,6 +1250,8 @@ void nfs_pageio_complete(struct nfs_pageio_descriptor *desc)
for (midx = 0; midx < desc->pg_mirror_count; midx++)
nfs_pageio_complete_mirror(desc, midx);
if (desc->pg_error < 0)
nfs_pageio_error_cleanup(desc);
if (desc->pg_ops->pg_cleanup)
desc->pg_ops->pg_cleanup(desc);
nfs_pageio_cleanup_mirroring(desc);