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staging/lustre/llite: don't add to page cache upon failure 

Reading directory pages may fail on MDS, in this case client should
not cache a non-up-to-date directory page, because it will cause
a later read on the same page fail.

Signed-off-by: Lai Siyao <lai.siyao@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5461
Reviewed-on: http://review.whamcloud.com/11450
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lai Siyao 2015-02-01 21:52:17 -05:00 committed by Greg Kroah-Hartman
parent 437dfb201a
commit c67587a748
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/lustre/lustre/llite/dir.c
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@ -183,7 +183,10 @@ static int ll_dir_filler(void *_hash, struct page *page0)
op_data->op_offset = hash;
rc = md_readpage(exp, op_data, page_pool, &request);
ll_finish_md_op_data(op_data);
if (rc == 0) {
if (rc < 0) {
/* page0 is special, which was added into page cache early */
delete_from_page_cache(page0);
} else if (rc == 0) {
body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
/* Checked by mdc_readpage() */
LASSERT(body != NULL);