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drbd: _drbd_no_send_page(): Return 0 upon success and an error code otherwise

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Andreas Gruenbacher 2011-03-16 09:41:10 +01:00 committed by Philipp Reisner
parent 73218a3c4c
commit b987427b53
1 changed files with 15 additions and 9 deletions
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24
drivers/block/drbd/drbd_main.c
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@ -1403,13 +1403,19 @@ static void drbd_update_congested(struct drbd_tconn *tconn)
* with page_count == 0 or PageSlab.
*/
static int _drbd_no_send_page(struct drbd_conf *mdev, struct page *page,
int offset, size_t size, unsigned msg_flags)
int offset, size_t size, unsigned msg_flags)
{
int sent = drbd_send(mdev->tconn, mdev->tconn->data.socket, kmap(page) + offset, size, msg_flags);
struct socket *socket;
void *addr;
int err;
socket = mdev->tconn->data.socket;
addr = kmap(page) + offset;
err = drbd_send_all(mdev->tconn, socket, addr, size, msg_flags);
kunmap(page);
if (sent == size)
mdev->send_cnt += size>>9;
return sent == size;
if (!err)
mdev->send_cnt += size >> 9;
return err;
}
static int _drbd_send_page(struct drbd_conf *mdev, struct page *page,
@ -1426,7 +1432,7 @@ static int _drbd_send_page(struct drbd_conf *mdev, struct page *page,
* __page_cache_release a page that would actually still be referenced
* by someone, leading to some obscure delayed Oops somewhere else. */
if (disable_sendpage || (page_count(page) < 1) || PageSlab(page))
return _drbd_no_send_page(mdev, page, offset, size, msg_flags);
return !_drbd_no_send_page(mdev, page, offset, size, msg_flags);
msg_flags |= MSG_NOSIGNAL;
drbd_update_congested(mdev->tconn);
@ -1465,9 +1471,9 @@ static int _drbd_send_bio(struct drbd_conf *mdev, struct bio *bio)
int i;
/* hint all but last page with MSG_MORE */
__bio_for_each_segment(bvec, bio, i, 0) {
if (!_drbd_no_send_page(mdev, bvec->bv_page,
bvec->bv_offset, bvec->bv_len,
i == bio->bi_vcnt -1 ? 0 : MSG_MORE))
if (_drbd_no_send_page(mdev, bvec->bv_page,
bvec->bv_offset, bvec->bv_len,
i == bio->bi_vcnt -1 ? 0 : MSG_MORE))
return 0;
}
return 1;