From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031552AbbKDW2b (ORCPT ); Wed, 4 Nov 2015 17:28:31 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34200 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031035AbbKDWIm (ORCPT ); Wed, 4 Nov 2015 17:08:42 -0500 From: mchristi@redhat.com To: linux-fsdevel@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, drbd-dev@lists.linbit.com Cc: Mike Christie Subject: [PATCH 07/32] dm: prepare for bi_rw split Date: Wed, 4 Nov 2015 16:08:04 -0600 Message-Id: <1446674909-5371-8-git-send-email-mchristi@redhat.com> In-Reply-To: <1446674909-5371-1-git-send-email-mchristi@redhat.com> References: <1446674909-5371-1-git-send-email-mchristi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mike Christie This patch prepares dm's submit_bio use for the next patches that split bi_rw into a operation and flags field. Instead of passing in a bitmap with both the operation and flags mixed in, the callers will now pass them in seperately. This patch modifies the code related to the submit_bio calls so the flags and operation are seperated. When this is done for all code, one of the later patches in the series will the actual submit_bio call, so the patches are bisectable. Signed-off-by: Mike Christie --- drivers/md/dm-bufio.c | 6 +++-- drivers/md/dm-io.c | 56 ++++++++++++++++++++++------------------- drivers/md/dm-kcopyd.c | 3 ++- drivers/md/dm-log.c | 5 ++-- drivers/md/dm-raid1.c | 11 +++++--- drivers/md/dm-snap-persistent.c | 24 ++++++++++-------- drivers/md/dm-thin.c | 6 ++--- include/linux/dm-io.h | 3 ++- 8 files changed, 64 insertions(+), 50 deletions(-) diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index 83cc52e..9d5ef0c 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -554,7 +554,8 @@ static void use_dmio(struct dm_buffer *b, int rw, sector_t block, { int r; struct dm_io_request io_req = { - .bi_rw = rw, + .bi_op = rw, + .bi_op_flags = 0, .notify.fn = dmio_complete, .notify.context = b, .client = b->c->dm_io, @@ -1302,7 +1303,8 @@ EXPORT_SYMBOL_GPL(dm_bufio_write_dirty_buffers); int dm_bufio_issue_flush(struct dm_bufio_client *c) { struct dm_io_request io_req = { - .bi_rw = WRITE_FLUSH, + .bi_op = REQ_OP_WRITE, + .bi_op_flags = WRITE_FLUSH, .mem.type = DM_IO_KMEM, .mem.ptr.addr = NULL, .client = c->dm_io, diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index 6f8e83b2..6479096 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -279,8 +279,9 @@ static void km_dp_init(struct dpages *dp, void *data) /*----------------------------------------------------------------- * IO routines that accept a list of pages. *---------------------------------------------------------------*/ -static void do_region(int rw, unsigned region, struct dm_io_region *where, - struct dpages *dp, struct io *io) +static void do_region(int op, int op_flags, unsigned region, + struct dm_io_region *where, struct dpages *dp, + struct io *io) { struct bio *bio; struct page *page; @@ -296,24 +297,25 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, /* * Reject unsupported discard and write same requests. */ - if (rw & REQ_DISCARD) + if (op == REQ_DISCARD) special_cmd_max_sectors = q->limits.max_discard_sectors; - else if (rw & REQ_WRITE_SAME) + else if (op == REQ_WRITE_SAME) special_cmd_max_sectors = q->limits.max_write_same_sectors; - if ((rw & (REQ_DISCARD | REQ_WRITE_SAME)) && special_cmd_max_sectors == 0) { + if ((op == REQ_DISCARD || op == REQ_WRITE_SAME) && + special_cmd_max_sectors == 0) { dec_count(io, region, -EOPNOTSUPP); return; } /* - * where->count may be zero if rw holds a flush and we need to + * where->count may be zero if op holds a flush and we need to * send a zero-sized flush. */ do { /* * Allocate a suitably sized-bio. */ - if ((rw & REQ_DISCARD) || (rw & REQ_WRITE_SAME)) + if ((op == REQ_DISCARD) || (op == REQ_WRITE_SAME)) num_bvecs = 1; else num_bvecs = min_t(int, BIO_MAX_PAGES, @@ -325,11 +327,11 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, bio->bi_end_io = endio; store_io_and_region_in_bio(bio, io, region); - if (rw & REQ_DISCARD) { + if (op == REQ_DISCARD) { num_sectors = min_t(sector_t, special_cmd_max_sectors, remaining); bio->bi_iter.bi_size = num_sectors << SECTOR_SHIFT; remaining -= num_sectors; - } else if (rw & REQ_WRITE_SAME) { + } else if (op == REQ_WRITE_SAME) { /* * WRITE SAME only uses a single page. */ @@ -356,11 +358,11 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, } atomic_inc(&io->count); - submit_bio(rw, bio); + submit_bio(op | op_flags, bio); } while (remaining); } -static void dispatch_io(int rw, unsigned int num_regions, +static void dispatch_io(int op, int op_flags, unsigned int num_regions, struct dm_io_region *where, struct dpages *dp, struct io *io, int sync) { @@ -370,7 +372,7 @@ static void dispatch_io(int rw, unsigned int num_regions, BUG_ON(num_regions > DM_IO_MAX_REGIONS); if (sync) - rw |= REQ_SYNC; + op_flags |= REQ_SYNC; /* * For multiple regions we need to be careful to rewind @@ -378,8 +380,8 @@ static void dispatch_io(int rw, unsigned int num_regions, */ for (i = 0; i < num_regions; i++) { *dp = old_pages; - if (where[i].count || (rw & REQ_FLUSH)) - do_region(rw, i, where + i, dp, io); + if (where[i].count || (op_flags & REQ_FLUSH)) + do_region(op, op_flags, i, where + i, dp, io); } /* @@ -403,13 +405,13 @@ static void sync_io_complete(unsigned long error, void *context) } static int sync_io(struct dm_io_client *client, unsigned int num_regions, - struct dm_io_region *where, int rw, struct dpages *dp, - unsigned long *error_bits) + struct dm_io_region *where, int op, int op_flags, + struct dpages *dp, unsigned long *error_bits) { struct io *io; struct sync_io sio; - if (num_regions > 1 && (rw & RW_MASK) != WRITE) { + if (num_regions > 1 && op != WRITE) { WARN_ON(1); return -EIO; } @@ -426,7 +428,7 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions, io->vma_invalidate_address = dp->vma_invalidate_address; io->vma_invalidate_size = dp->vma_invalidate_size; - dispatch_io(rw, num_regions, where, dp, io, 1); + dispatch_io(op, op_flags, num_regions, where, dp, io, 1); wait_for_completion_io(&sio.wait); @@ -437,12 +439,12 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions, } static int async_io(struct dm_io_client *client, unsigned int num_regions, - struct dm_io_region *where, int rw, struct dpages *dp, - io_notify_fn fn, void *context) + struct dm_io_region *where, int op, int op_flags, + struct dpages *dp, io_notify_fn fn, void *context) { struct io *io; - if (num_regions > 1 && (rw & RW_MASK) != WRITE) { + if (num_regions > 1 && op != WRITE) { WARN_ON(1); fn(1, context); return -EIO; @@ -458,7 +460,7 @@ static int async_io(struct dm_io_client *client, unsigned int num_regions, io->vma_invalidate_address = dp->vma_invalidate_address; io->vma_invalidate_size = dp->vma_invalidate_size; - dispatch_io(rw, num_regions, where, dp, io, 0); + dispatch_io(op, op_flags, num_regions, where, dp, io, 0); return 0; } @@ -481,7 +483,7 @@ static int dp_init(struct dm_io_request *io_req, struct dpages *dp, case DM_IO_VMA: flush_kernel_vmap_range(io_req->mem.ptr.vma, size); - if ((io_req->bi_rw & RW_MASK) == READ) { + if (io_req->bi_op == READ) { dp->vma_invalidate_address = io_req->mem.ptr.vma; dp->vma_invalidate_size = size; } @@ -519,10 +521,12 @@ int dm_io(struct dm_io_request *io_req, unsigned num_regions, if (!io_req->notify.fn) return sync_io(io_req->client, num_regions, where, - io_req->bi_rw, &dp, sync_error_bits); + io_req->bi_op, io_req->bi_op_flags, &dp, + sync_error_bits); - return async_io(io_req->client, num_regions, where, io_req->bi_rw, - &dp, io_req->notify.fn, io_req->notify.context); + return async_io(io_req->client, num_regions, where, io_req->bi_op, + io_req->bi_op_flags, &dp, io_req->notify.fn, + io_req->notify.context); } EXPORT_SYMBOL(dm_io); diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c index 3a7cade..02dccbe 100644 --- a/drivers/md/dm-kcopyd.c +++ b/drivers/md/dm-kcopyd.c @@ -496,7 +496,8 @@ static int run_io_job(struct kcopyd_job *job) { int r; struct dm_io_request io_req = { - .bi_rw = job->rw, + .bi_op = job->rw, + .bi_op_flags = 0, .mem.type = DM_IO_PAGE_LIST, .mem.ptr.pl = job->pages, .mem.offset = 0, diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c index 627d191..4ca2d1d 100644 --- a/drivers/md/dm-log.c +++ b/drivers/md/dm-log.c @@ -293,7 +293,7 @@ static void header_from_disk(struct log_header_core *core, struct log_header_dis static int rw_header(struct log_c *lc, int rw) { - lc->io_req.bi_rw = rw; + lc->io_req.bi_op = rw; return dm_io(&lc->io_req, 1, &lc->header_location, NULL); } @@ -306,7 +306,8 @@ static int flush_header(struct log_c *lc) .count = 0, }; - lc->io_req.bi_rw = WRITE_FLUSH; + lc->io_req.bi_op = REQ_OP_WRITE; + lc->io_req.bi_op_flags = WRITE_FLUSH; return dm_io(&lc->io_req, 1, &null_location, NULL); } diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index f2a363a..ec48487 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -260,7 +260,8 @@ static int mirror_flush(struct dm_target *ti) struct dm_io_region io[ms->nr_mirrors]; struct mirror *m; struct dm_io_request io_req = { - .bi_rw = WRITE_FLUSH, + .bi_op = REQ_OP_WRITE, + .bi_op_flags = WRITE_FLUSH, .mem.type = DM_IO_KMEM, .mem.ptr.addr = NULL, .client = ms->io_client, @@ -541,7 +542,8 @@ static void read_async_bio(struct mirror *m, struct bio *bio) { struct dm_io_region io; struct dm_io_request io_req = { - .bi_rw = READ, + .bi_op = REQ_OP_READ, + .bi_op_flags = 0, .mem.type = DM_IO_BIO, .mem.ptr.bio = bio, .notify.fn = read_callback, @@ -654,7 +656,8 @@ static void do_write(struct mirror_set *ms, struct bio *bio) struct dm_io_region io[ms->nr_mirrors], *dest = io; struct mirror *m; struct dm_io_request io_req = { - .bi_rw = WRITE | (bio->bi_rw & WRITE_FLUSH_FUA), + .bi_op = REQ_OP_WRITE, + .bi_op_flags = bio->bi_rw & WRITE_FLUSH_FUA, .mem.type = DM_IO_BIO, .mem.ptr.bio = bio, .notify.fn = write_callback, @@ -663,7 +666,7 @@ static void do_write(struct mirror_set *ms, struct bio *bio) }; if (bio->bi_rw & REQ_DISCARD) { - io_req.bi_rw |= REQ_DISCARD; + io_req.bi_op_flags |= REQ_DISCARD; io_req.mem.type = DM_IO_KMEM; io_req.mem.ptr.addr = NULL; } diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c index 117a05e..1032fcb 100644 --- a/drivers/md/dm-snap-persistent.c +++ b/drivers/md/dm-snap-persistent.c @@ -226,8 +226,8 @@ static void do_metadata(struct work_struct *work) /* * Read or write a chunk aligned and sized block of data from a device. */ -static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, int rw, - int metadata) +static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, int op, + int op_flags, int metadata) { struct dm_io_region where = { .bdev = dm_snap_cow(ps->store->snap)->bdev, @@ -235,7 +235,8 @@ static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, int rw, .count = ps->store->chunk_size, }; struct dm_io_request io_req = { - .bi_rw = rw, + .bi_op = op, + .bi_op_flags = op_flags, .mem.type = DM_IO_VMA, .mem.ptr.vma = area, .client = ps->io_client, @@ -281,14 +282,14 @@ static void skip_metadata(struct pstore *ps) * Read or write a metadata area. Remembering to skip the first * chunk which holds the header. */ -static int area_io(struct pstore *ps, int rw) +static int area_io(struct pstore *ps, int op, int op_flags) { int r; chunk_t chunk; chunk = area_location(ps, ps->current_area); - r = chunk_io(ps, ps->area, chunk, rw, 0); + r = chunk_io(ps, ps->area, chunk, op, op_flags, 0); if (r) return r; @@ -302,7 +303,8 @@ static void zero_memory_area(struct pstore *ps) static int zero_disk_area(struct pstore *ps, chunk_t area) { - return chunk_io(ps, ps->zero_area, area_location(ps, area), WRITE, 0); + return chunk_io(ps, ps->zero_area, area_location(ps, area), WRITE, 0, + 0); } static int read_header(struct pstore *ps, int *new_snapshot) @@ -334,7 +336,7 @@ static int read_header(struct pstore *ps, int *new_snapshot) if (r) return r; - r = chunk_io(ps, ps->header_area, 0, READ, 1); + r = chunk_io(ps, ps->header_area, 0, READ, 0, 1); if (r) goto bad; @@ -395,7 +397,7 @@ static int write_header(struct pstore *ps) dh->version = cpu_to_le32(ps->version); dh->chunk_size = cpu_to_le32(ps->store->chunk_size); - return chunk_io(ps, ps->header_area, 0, WRITE, 1); + return chunk_io(ps, ps->header_area, 0, WRITE, 0, 1); } /* @@ -736,7 +738,7 @@ static void persistent_commit_exception(struct dm_exception_store *store, /* * Commit exceptions to disk. */ - if (ps->valid && area_io(ps, WRITE_FLUSH_FUA)) + if (ps->valid && area_io(ps, REQ_OP_WRITE, WRITE_FLUSH_FUA)) ps->valid = 0; /* @@ -776,7 +778,7 @@ static int persistent_prepare_merge(struct dm_exception_store *store, return 0; ps->current_area--; - r = area_io(ps, READ); + r = area_io(ps, REQ_OP_READ, 0); if (r < 0) return r; ps->current_committed = ps->exceptions_per_area; @@ -813,7 +815,7 @@ static int persistent_commit_merge(struct dm_exception_store *store, for (i = 0; i < nr_merged; i++) clear_exception(ps, ps->current_committed - 1 - i); - r = area_io(ps, WRITE_FLUSH_FUA); + r = area_io(ps, REQ_OP_WRITE, WRITE_FLUSH_FUA); if (r < 0) return r; diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index 3897b90..1500582 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -338,7 +338,7 @@ static int __blkdev_issue_discard_async(struct block_device *bdev, sector_t sect struct bio *parent_bio) { struct request_queue *q = bdev_get_queue(bdev); - int type = REQ_WRITE | REQ_DISCARD; + int op_flags = 0; struct bio *bio; if (!q || !nr_sects) @@ -350,7 +350,7 @@ static int __blkdev_issue_discard_async(struct block_device *bdev, sector_t sect if (flags & BLKDEV_DISCARD_SECURE) { if (!blk_queue_secdiscard(q)) return -EOPNOTSUPP; - type |= REQ_SECURE; + op_flags |= REQ_SECURE; } /* @@ -366,7 +366,7 @@ static int __blkdev_issue_discard_async(struct block_device *bdev, sector_t sect bio->bi_bdev = bdev; bio->bi_iter.bi_size = nr_sects << 9; - submit_bio(type, bio); + submit_bio(REQ_OP_DISCARD | op_flags, bio); return 0; } diff --git a/include/linux/dm-io.h b/include/linux/dm-io.h index a68cbe5..b91b023 100644 --- a/include/linux/dm-io.h +++ b/include/linux/dm-io.h @@ -57,7 +57,8 @@ struct dm_io_notify { */ struct dm_io_client; struct dm_io_request { - int bi_rw; /* READ|WRITE - not READA */ + int bi_op; /* REQ_OP */ + int bi_op_flags; /* rq_flag_bits */ struct dm_io_memory mem; /* Memory to use for io */ struct dm_io_notify notify; /* Synchronous if notify.fn is NULL */ struct dm_io_client *client; /* Client memory handler */ -- 1.8.3.1