Re: [PATCH v3 11/20] cifs: set mapping error when page writeback fails in writepage or launder_pages

Christoph Hellwig
2017-04-24T15:27:09Z

On Mon, Apr 24, 2017 at 09:22:50AM -0400, Jeff Layton wrote:
> Signed-off-by: Jeff Layton <jlayton@redhat.com>
> ---
> fs/cifs/file.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/fs/cifs/file.c b/fs/cifs/file.c
> index 21d404535739..4b696a23b0b1 100644
> --- a/fs/cifs/file.c
> +++ b/fs/cifs/file.c
> @@ -2234,14 +2234,16 @@ cifs_writepage_locked(struct page *page, struct writeback_control *wbc)
> set_page_writeback(page);
> retry_write:
> rc = cifs_partialpagewrite(page, 0, PAGE_SIZE);
> + if (rc == -EAGAIN && wbc->sync_mode == WB_SYNC_ALL) {
> goto retry_write;
> + } else if (rc == -EAGAIN) {
> redirty_page_for_writepage(wbc, page);
> + } else if (rc != 0) {
> SetPageError(page);
> + mapping_set_error(page->mapping, rc);
> + } else {
> SetPageUptodate(page);
> + }

Hmmm. I might be a little too nitpicky, but I hate having the same
partial condition duplicated if possible. Why not:

if (rc == -EAGAIN) {
if (wbc->sync_mode == WB_SYNC_ALL)
goto retry_write;
redirty_page_for_writepage(wbc, page);
} else if (rc) {
SetPageError(page);
mapping_set_error(page->mapping, rc);
} else {
SetPageUptodate(page);
}

Otherwise this looks fine to me:

Reviewed-by: Christoph Hellwig <hch@lst.de>