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[SCSI] libosd: osd_req_{read,write} takes a length parameter

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For supporting of chained-bios we can not inspect the first
bio only, as before. Caller shall pass the total length of the
request, ie. sum_bytes(bio-chain).

Also since the bio might be a chain we don't set it's direction
on behalf of it's callers. The bio direction should be properly
set prior to this call. So fix a couple of write users that now
need to set the bio direction properly

[In this patch I change both library code and user sites at
 exofs, to make it easy on integration. It should be submitted
 via James's scsi-misc tree.]

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
CC: Jeff Garzik <jeff@garzik.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Boaz Harrosh
2009-05-24 20:04:26 +03:00
committed by James Bottomley
parent 546881aea9
commit 62f469b596
3 changed files with 18 additions and 14 deletions
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5
fs/exofs/inode.c
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@@ -266,7 +266,7 @@ static int read_exec(struct page_collect *pcol, bool is_sync)
goto err;
}
osd_req_read(or, &obj, pcol->bio, i_start);
osd_req_read(or, &obj, i_start, pcol->bio, pcol->length);
if (is_sync) {
exofs_sync_op(or, pcol->sbi->s_timeout, oi->i_cred);
@@ -522,7 +522,8 @@ static int write_exec(struct page_collect *pcol)
*pcol_copy = *pcol;
osd_req_write(or, &obj, pcol_copy->bio, i_start);
pcol_copy->bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */
osd_req_write(or, &obj, i_start, pcol_copy->bio, pcol_copy->length);
ret = exofs_async_op(or, writepages_done, pcol_copy, oi->i_cred);
if (unlikely(ret)) {
EXOFS_ERR("write_exec: exofs_async_op() Faild\n");