X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=drivers%2Fmd%2Fdm.c;h=a3f21dc02bd891fb84d8df00c5b22b2ad15a2e64;hb=682c30ed2165d5694a414d31eac7c63ac5700fb0;hp=d21e1284604f6a2e391ce37c8a6c85a1b06c91ca;hpb=fea069152614cdeefba4b2bf80afcddb9c217fc8;p=~andy%2Flinux diff --git a/drivers/md/dm.c b/drivers/md/dm.c index d21e1284604..a3f21dc02bd 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -338,6 +339,7 @@ static int dm_blk_open(struct block_device *bdev, fmode_t mode) { struct mapped_device *md; + lock_kernel(); spin_lock(&_minor_lock); md = bdev->bd_disk->private_data; @@ -355,6 +357,7 @@ static int dm_blk_open(struct block_device *bdev, fmode_t mode) out: spin_unlock(&_minor_lock); + unlock_kernel(); return md ? 0 : -ENXIO; } @@ -362,8 +365,12 @@ out: static int dm_blk_close(struct gendisk *disk, fmode_t mode) { struct mapped_device *md = disk->private_data; + + lock_kernel(); atomic_dec(&md->open_count); dm_put(md); + unlock_kernel(); + return 0; } @@ -614,7 +621,7 @@ static void dec_pending(struct dm_io *io, int error) */ spin_lock_irqsave(&md->deferred_lock, flags); if (__noflush_suspending(md)) { - if (!bio_rw_flagged(io->bio, BIO_RW_BARRIER)) + if (!(io->bio->bi_rw & REQ_HARDBARRIER)) bio_list_add_head(&md->deferred, io->bio); } else @@ -626,7 +633,7 @@ static void dec_pending(struct dm_io *io, int error) io_error = io->error; bio = io->bio; - if (bio_rw_flagged(bio, BIO_RW_BARRIER)) { + if (bio->bi_rw & REQ_HARDBARRIER) { /* * There can be just one barrier request so we use * a per-device variable for error reporting. @@ -792,12 +799,12 @@ static void dm_end_request(struct request *clone, int error) { int rw = rq_data_dir(clone); int run_queue = 1; - bool is_barrier = blk_barrier_rq(clone); + bool is_barrier = clone->cmd_flags & REQ_HARDBARRIER; struct dm_rq_target_io *tio = clone->end_io_data; struct mapped_device *md = tio->md; struct request *rq = tio->orig; - if (blk_pc_request(rq) && !is_barrier) { + if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !is_barrier) { rq->errors = clone->errors; rq->resid_len = clone->resid_len; @@ -844,7 +851,7 @@ void dm_requeue_unmapped_request(struct request *clone) struct request_queue *q = rq->q; unsigned long flags; - if (unlikely(blk_barrier_rq(clone))) { + if (unlikely(clone->cmd_flags & REQ_HARDBARRIER)) { /* * Barrier clones share an original request. * Leave it to dm_end_request(), which handles this special @@ -943,7 +950,7 @@ static void dm_complete_request(struct request *clone, int error) struct dm_rq_target_io *tio = clone->end_io_data; struct request *rq = tio->orig; - if (unlikely(blk_barrier_rq(clone))) { + if (unlikely(clone->cmd_flags & REQ_HARDBARRIER)) { /* * Barrier clones share an original request. So can't use * softirq_done with the original. @@ -972,7 +979,7 @@ void dm_kill_unmapped_request(struct request *clone, int error) struct dm_rq_target_io *tio = clone->end_io_data; struct request *rq = tio->orig; - if (unlikely(blk_barrier_rq(clone))) { + if (unlikely(clone->cmd_flags & REQ_HARDBARRIER)) { /* * Barrier clones share an original request. * Leave it to dm_end_request(), which handles this special @@ -1106,7 +1113,7 @@ static struct bio *split_bvec(struct bio *bio, sector_t sector, clone->bi_sector = sector; clone->bi_bdev = bio->bi_bdev; - clone->bi_rw = bio->bi_rw & ~(1 << BIO_RW_BARRIER); + clone->bi_rw = bio->bi_rw & ~REQ_HARDBARRIER; clone->bi_vcnt = 1; clone->bi_size = to_bytes(len); clone->bi_io_vec->bv_offset = offset; @@ -1133,7 +1140,7 @@ static struct bio *clone_bio(struct bio *bio, sector_t sector, clone = bio_alloc_bioset(GFP_NOIO, bio->bi_max_vecs, bs); __bio_clone(clone, bio); - clone->bi_rw &= ~(1 << BIO_RW_BARRIER); + clone->bi_rw &= ~REQ_HARDBARRIER; clone->bi_destructor = dm_bio_destructor; clone->bi_sector = sector; clone->bi_idx = idx; @@ -1301,7 +1308,7 @@ static void __split_and_process_bio(struct mapped_device *md, struct bio *bio) ci.map = dm_get_live_table(md); if (unlikely(!ci.map)) { - if (!bio_rw_flagged(bio, BIO_RW_BARRIER)) + if (!(bio->bi_rw & REQ_HARDBARRIER)) bio_io_error(bio); else if (!md->barrier_error) @@ -1414,7 +1421,7 @@ static int _dm_request(struct request_queue *q, struct bio *bio) * we have to queue this io for later. */ if (unlikely(test_bit(DMF_QUEUE_IO_TO_THREAD, &md->flags)) || - unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER))) { + unlikely(bio->bi_rw & REQ_HARDBARRIER)) { up_read(&md->io_lock); if (unlikely(test_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags)) && @@ -1455,20 +1462,9 @@ static int dm_request(struct request_queue *q, struct bio *bio) return _dm_request(q, bio); } -/* - * Mark this request as flush request, so that dm_request_fn() can - * recognize. - */ -static void dm_rq_prepare_flush(struct request_queue *q, struct request *rq) -{ - rq->cmd_type = REQ_TYPE_LINUX_BLOCK; - rq->cmd[0] = REQ_LB_OP_FLUSH; -} - static bool dm_rq_is_flush_request(struct request *rq) { - if (rq->cmd_type == REQ_TYPE_LINUX_BLOCK && - rq->cmd[0] == REQ_LB_OP_FLUSH) + if (rq->cmd_flags & REQ_FLUSH) return true; else return false; @@ -1912,8 +1908,7 @@ static struct mapped_device *alloc_dev(int minor) blk_queue_softirq_done(md->queue, dm_softirq_done); blk_queue_prep_rq(md->queue, dm_prep_fn); blk_queue_lld_busy(md->queue, dm_lld_busy); - blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN_FLUSH, - dm_rq_prepare_flush); + blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN_FLUSH); md->disk = alloc_disk(1); if (!md->disk) @@ -2296,7 +2291,7 @@ static void dm_wq_work(struct work_struct *work) if (dm_request_based(md)) generic_make_request(c); else { - if (bio_rw_flagged(c, BIO_RW_BARRIER)) + if (c->bi_rw & REQ_HARDBARRIER) process_barrier(md, c); else __split_and_process_bio(md, c);