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block: unify flags for struct bio and struct request

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Remove the current bio flags and reuse the request flags for the bio, too.
This allows to more easily trace the type of I/O from the filesystem
down to the block driver.  There were two flags in the bio that were
missing in the requests:  BIO_RW_UNPLUG and BIO_RW_AHEAD.  Also I've
renamed two request flags that had a superflous RW in them.

Note that the flags are in bio.h despite having the REQ_ name - as
blkdev.h includes bio.h that is the only way to go for now.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2010-08-07 18:20:39 +02:00 • committed by Jens Axboe
commit 7b6d91daee
47 changed files with 242 additions and 289 deletions
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4
fs/gfs2/log.c
View file

@ -595,7 +595,7 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
goto skip_barrier;
get_bh(bh);
submit_bh(WRITE_BARRIER | (1 << BIO_RW_META), bh);
submit_bh(WRITE_BARRIER | REQ_META, bh);
wait_on_buffer(bh);
if (buffer_eopnotsupp(bh)) {
clear_buffer_eopnotsupp(bh);
@ -605,7 +605,7 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
lock_buffer(bh);
skip_barrier:
get_bh(bh);
submit_bh(WRITE_SYNC | (1 << BIO_RW_META), bh);
submit_bh(WRITE_SYNC | REQ_META, bh);
wait_on_buffer(bh);
}
if (!buffer_uptodate(bh))

8
fs/gfs2/meta_io.c
View file

@ -36,8 +36,8 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
{
struct buffer_head *bh, *head;
int nr_underway = 0;
int write_op = (1 << BIO_RW_META) | ((wbc->sync_mode == WB_SYNC_ALL ?
WRITE_SYNC_PLUG : WRITE));
int write_op = REQ_META |
(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC_PLUG : WRITE);
BUG_ON(!PageLocked(page));
BUG_ON(!page_has_buffers(page));
@ -225,7 +225,7 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
}
bh->b_end_io = end_buffer_read_sync;
get_bh(bh);
submit_bh(READ_SYNC | (1 << BIO_RW_META), bh);
submit_bh(READ_SYNC | REQ_META, bh);
if (!(flags & DIO_WAIT))
return 0;
@ -432,7 +432,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
if (buffer_uptodate(first_bh))
goto out;
if (!buffer_locked(first_bh))
ll_rw_block(READ_SYNC | (1 << BIO_RW_META), 1, &first_bh);
ll_rw_block(READ_SYNC | REQ_META, 1, &first_bh);
dblock++;
extlen--;

2
fs/gfs2/ops_fstype.c
View file

@ -275,7 +275,7 @@ static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
bio->bi_end_io = end_bio_io_page;
bio->bi_private = page;
submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
submit_bio(READ_SYNC | REQ_META, bio);
wait_on_page_locked(page);
bio_put(bio);
if (!PageUptodate(page)) {