[V13,14/19] block: allow bio_for_each_segment_all() to iterate over multi-page bvec

Message ID	20190111110127.21664-15-ming.lei@redhat.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <owner-linux-mm@kvack.org> Received-SPF: pass (google.com: domain of ming.lei@redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; From: Ming Lei <ming.lei@redhat.com> To: Jens Axboe <axboe@kernel.dk> Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Theodore Ts'o <tytso@mit.edu>, Omar Sandoval <osandov@fb.com>, Sagi Grimberg <sagi@grimberg.me>, Dave Chinner <dchinner@redhat.com>, Kent Overstreet <kent.overstreet@gmail.com>, Mike Snitzer <snitzer@redhat.com>, dm-devel@redhat.com, Alexander Viro <viro@zeniv.linux.org.uk>, linux-fsdevel@vger.kernel.org, linux-raid@vger.kernel.org, David Sterba <dsterba@suse.com>, linux-btrfs@vger.kernel.org, "Darrick J . Wong" <darrick.wong@oracle.com>, linux-xfs@vger.kernel.org, Gao Xiang <gaoxiang25@huawei.com>, Christoph Hellwig <hch@lst.de>, linux-ext4@vger.kernel.org, Coly Li <colyli@suse.de>, linux-bcache@vger.kernel.org, Boaz Harrosh <ooo@electrozaur.com>, Bob Peterson <rpeterso@redhat.com>, cluster-devel@redhat.com, Ming Lei <ming.lei@redhat.com> Subject: [PATCH V13 14/19] block: allow bio_for_each_segment_all() to iterate over multi-page bvec Date: Fri, 11 Jan 2019 19:01:22 +0800 Message-Id: <20190111110127.21664-15-ming.lei@redhat.com> In-Reply-To: <20190111110127.21664-1-ming.lei@redhat.com> References: <20190111110127.21664-1-ming.lei@redhat.com> Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	block: support multi-page bvec \| expand [V13,00/19] block: support multi-page bvec [V13,01/19] btrfs: look at bi_size for repair decisions [V13,02/19] block: don't use bio->bi_vcnt to figure out segment number [V13,03/19] block: remove bvec_iter_rewind() [V13,04/19] block: rename bvec helpers [V13,05/19] block: introduce multi-page bvec helpers [V13,06/19] block: introduce bio_for_each_bvec() and rq_for_each_bvec() [V13,07/19] block: use bio_for_each_bvec() to compute multi-page bvec count [V13,08/19] block: use bio_for_each_bvec() to map sg [V13,09/19] block: introduce bvec_last_segment() [V13,10/19] fs/buffer.c: use bvec iterator to truncate the bio [V13,11/19] btrfs: use bvec_last_segment to get bio's last page [V13,12/19] block: loop: pass multi-page bvec to iov_iter [V13,13/19] bcache: avoid to use bio_for_each_segment_all() in bch_bio_alloc_pages() [V13,14/19] block: allow bio_for_each_segment_all() to iterate over multi-page bvec [V13,15/19] block: enable multipage bvecs [V13,16/19] block: always define BIO_MAX_PAGES as 256 [V13,17/19] block: document usage of bio iterator helpers [V13,18/19] block: kill QUEUE_FLAG_NO_SG_MERGE [V13,19/19] block: kill BLK_MQ_F_SG_MERGE

diff --git a/block/bio.c b/block/bio.c index 4db1008309ed..968b12fea564 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1072,8 +1072,9 @@ static int bio_copy_from_iter(struct bio *bio, struct iov_iter *iter) { int i; struct bio_vec *bvec; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { ssize_t ret; ret = copy_page_from_iter(bvec->bv_page, @@ -1103,8 +1104,9 @@ static int bio_copy_to_iter(struct bio *bio, struct iov_iter iter) { int i; struct bio_vec *bvec; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { ssize_t ret; ret = copy_page_to_iter(bvec->bv_page, @@ -1126,8 +1128,9 @@ void bio_free_pages(struct bio *bio) { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) + bio_for_each_segment_all(bvec, bio, i, iter_all) __free_page(bvec->bv_page); } EXPORT_SYMBOL(bio_free_pages); @@ -1295,6 +1298,7 @@ struct bio *bio_map_user_iov(struct request_queue *q, struct bio *bio; int ret; struct bio_vec *bvec; + struct bvec_iter_all iter_all; if (!iov_iter_count(iter)) return ERR_PTR(-EINVAL); @@ -1368,7 +1372,7 @@ struct bio *bio_map_user_iov(struct request_queue *q, return bio; out_unmap: - bio_for_each_segment_all(bvec, bio, j) { + bio_for_each_segment_all(bvec, bio, j, iter_all) { put_page(bvec->bv_page); } bio_put(bio); @@ -1379,11 +1383,12 @@ static void __bio_unmap_user(struct bio *bio) { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; /* * make sure we dirty pages we wrote to */ - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { if (bio_data_dir(bio) == READ) set_page_dirty_lock(bvec->bv_page); @@ -1475,8 +1480,9 @@ static void bio_copy_kern_endio_read(struct bio *bio) char *p = bio->bi_private; struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { memcpy(p, page_address(bvec->bv_page), bvec->bv_len); p += bvec->bv_len; } @@ -1585,8 +1591,9 @@ void bio_set_pages_dirty(struct bio *bio) { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { if (!PageCompound(bvec->bv_page)) set_page_dirty_lock(bvec->bv_page); } @@ -1596,8 +1603,9 @@ static void bio_release_pages(struct bio *bio) { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) + bio_for_each_segment_all(bvec, bio, i, iter_all) put_page(bvec->bv_page); } @@ -1644,8 +1652,9 @@ void bio_check_pages_dirty(struct bio *bio) struct bio_vec *bvec; unsigned long flags; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { if (!PageDirty(bvec->bv_page) && !PageCompound(bvec->bv_page)) goto defer; } diff --git a/block/bounce.c b/block/bounce.c index ffb9e9ecfa7e..add085e28b1d 100644 --- a/block/bounce.c +++ b/block/bounce.c @@ -165,11 +165,12 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool) struct bio_vec *bvec, orig_vec; int i; struct bvec_iter orig_iter = bio_orig->bi_iter; + struct bvec_iter_all iter_all; /* * free up bounce indirect pages used */ - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { orig_vec = bio_iter_iovec(bio_orig, orig_iter); if (bvec->bv_page != orig_vec.bv_page) { dec_zone_page_state(bvec->bv_page, NR_BOUNCE); @@ -294,6 +295,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig, bool bounce = false; int sectors = 0; bool passthrough = bio_is_passthrough(*bio_orig); + struct bvec_iter_all iter_all; bio_for_each_segment(from, *bio_orig, iter) { if (i++ < BIO_MAX_PAGES) @@ -313,7 +315,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig, bio = bounce_clone_bio(*bio_orig, GFP_NOIO, passthrough ? NULL : &bounce_bio_set); - bio_for_each_segment_all(to, bio, i) { + bio_for_each_segment_all(to, bio, i, iter_all) { struct page *page = to->bv_page; if (page_to_pfn(page) <= q->limits.bounce_pfn) diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index 23cb1dc7296b..64def336f053 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -432,8 +432,9 @@ static void do_btree_node_write(struct btree *b) int j; struct bio_vec *bv; void *base = (void *) ((unsigned long) i & ~(PAGE_SIZE - 1)); + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bv, b->bio, j) + bio_for_each_segment_all(bv, b->bio, j, iter_all) memcpy(page_address(bv->bv_page), base + j * PAGE_SIZE, PAGE_SIZE); diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 0ff22159a0ca..856df7b959c9 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1447,8 +1447,9 @@ static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone) { unsigned int i; struct bio_vec *bv; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bv, clone, i) { + bio_for_each_segment_all(bv, clone, i, iter_all) { BUG_ON(!bv->bv_page); mempool_free(bv->bv_page, &cc->page_pool); } diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 1d54109071cc..6f74a3b06c7e 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -2114,13 +2114,14 @@ static void process_checks(struct r1bio *r1_bio) struct page **spages = get_resync_pages(sbio)->pages; struct bio_vec *bi; int page_len[RESYNC_PAGES] = { 0 }; + struct bvec_iter_all iter_all; if (sbio->bi_end_io != end_sync_read) continue; /* Now we can 'fixup' the error value */ sbio->bi_status = 0; - bio_for_each_segment_all(bi, sbio, j) + bio_for_each_segment_all(bi, sbio, j, iter_all) page_len[j] = bi->bv_len; if (!status) { diff --git a/drivers/staging/erofs/data.c b/drivers/staging/erofs/data.c index 5a55f0bfdfbb..4871ba7b7d9a 100644 --- a/drivers/staging/erofs/data.c +++ b/drivers/staging/erofs/data.c @@ -20,8 +20,9 @@ static inline void read_endio(struct bio *bio) int i; struct bio_vec *bvec; const blk_status_t err = bio->bi_status; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; /* page is already locked */ diff --git a/drivers/staging/erofs/unzip_vle.c b/drivers/staging/erofs/unzip_vle.c index 4ac1099a39c6..c057c5616b1d 100644 --- a/drivers/staging/erofs/unzip_vle.c +++ b/drivers/staging/erofs/unzip_vle.c @@ -830,8 +830,9 @@ static inline void z_erofs_vle_read_endio(struct bio *bio) #ifdef EROFS_FS_HAS_MANAGED_CACHE struct address_space *mc = NULL; #endif + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; bool cachemngd = false; diff --git a/fs/block_dev.c b/fs/block_dev.c index c546cdce77e6..33b6a2f03468 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -197,6 +197,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, ssize_t ret; blk_qc_t qc; int i; + struct bvec_iter_all iter_all; if ((pos | iov_iter_alignment(iter)) & (bdev_logical_block_size(bdev) - 1)) @@ -246,7 +247,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, } __set_current_state(TASK_RUNNING); - bio_for_each_segment_all(bvec, &bio, i) { + bio_for_each_segment_all(bvec, &bio, i, iter_all) { if (should_dirty && !PageCompound(bvec->bv_page)) set_page_dirty_lock(bvec->bv_page); put_page(bvec->bv_page); @@ -315,8 +316,9 @@ static void blkdev_bio_end_io(struct bio *bio) } else { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) + bio_for_each_segment_all(bvec, bio, i, iter_all) put_page(bvec->bv_page); bio_put(bio); } diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 548057630b69..6896ea60c843 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -162,13 +162,14 @@ static void end_compressed_bio_read(struct bio *bio) } else { int i; struct bio_vec *bvec; + struct bvec_iter_all iter_all; /* * we have verified the checksum already, set page * checked so the end_io handlers know about it */ ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment_all(bvec, cb->orig_bio, i) + bio_for_each_segment_all(bvec, cb->orig_bio, i, iter_all) SetPageChecked(bvec->bv_page); bio_endio(cb->orig_bio); diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 8da2f380d3c0..5cc391fc6a57 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -832,9 +832,10 @@ static blk_status_t btree_csum_one_bio(struct bio *bio) struct bio_vec *bvec; struct btrfs_root *root; int i, ret = 0; + struct bvec_iter_all iter_all; ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { root = BTRFS_I(bvec->bv_page->mapping->host)->root; ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); if (ret) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index c092f88700bd..e4c39f0e8c8e 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2422,9 +2422,10 @@ static void end_bio_extent_writepage(struct bio *bio) u64 start; u64 end; int i; + struct bvec_iter_all iter_all; ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; struct inode *inode = page->mapping->host; struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); @@ -2493,9 +2494,10 @@ static void end_bio_extent_readpage(struct bio *bio) int mirror; int ret; int i; + struct bvec_iter_all iter_all; ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; struct inode *inode = page->mapping->host; struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); @@ -3635,9 +3637,10 @@ static void end_bio_extent_buffer_writepage(struct bio *bio) struct bio_vec *bvec; struct extent_buffer *eb; int i, done; + struct bvec_iter_all iter_all; ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; eb = (struct extent_buffer *)page->private; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 43eb4535319d..861593ab1cbb 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -7778,6 +7778,7 @@ static void btrfs_retry_endio_nocsum(struct bio *bio) struct bio_vec *bvec; struct extent_io_tree *io_tree, *failure_tree; int i; + struct bvec_iter_all iter_all; if (bio->bi_status) goto end; @@ -7789,7 +7790,7 @@ static void btrfs_retry_endio_nocsum(struct bio *bio) done->uptodate = 1; ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment_all(bvec, bio, i) + bio_for_each_segment_all(bvec, bio, i, iter_all) clean_io_failure(BTRFS_I(inode)->root->fs_info, failure_tree, io_tree, done->start, bvec->bv_page, btrfs_ino(BTRFS_I(inode)), 0); @@ -7868,6 +7869,7 @@ static void btrfs_retry_endio(struct bio *bio) int uptodate; int ret; int i; + struct bvec_iter_all iter_all; if (bio->bi_status) goto end; @@ -7881,7 +7883,7 @@ static void btrfs_retry_endio(struct bio *bio) failure_tree = &BTRFS_I(inode)->io_failure_tree; ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { ret = __readpage_endio_check(inode, io_bio, i, bvec->bv_page, bvec->bv_offset, done->start, bvec->bv_len); diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c index e74455eb42f9..1869ba8e5981 100644 --- a/fs/btrfs/raid56.c +++ b/fs/btrfs/raid56.c @@ -1443,10 +1443,11 @@ static void set_bio_pages_uptodate(struct bio *bio) { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment_all(bvec, bio, i) + bio_for_each_segment_all(bvec, bio, i, iter_all) SetPageUptodate(bvec->bv_page); } diff --git a/fs/crypto/bio.c b/fs/crypto/bio.c index 0959044c5cee..5759bcd018cd 100644 --- a/fs/crypto/bio.c +++ b/fs/crypto/bio.c @@ -30,8 +30,9 @@ static void __fscrypt_decrypt_bio(struct bio *bio, bool done) { struct bio_vec *bv; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bv, bio, i) { + bio_for_each_segment_all(bv, bio, i, iter_all) { struct page *page = bv->bv_page; int ret = fscrypt_decrypt_page(page->mapping->host, page, PAGE_SIZE, 0, page->index); diff --git a/fs/direct-io.c b/fs/direct-io.c index dbc1a1f080ce..47fb973b92e2 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -551,7 +551,9 @@ static blk_status_t dio_bio_complete(struct dio *dio, struct bio *bio) if (dio->is_async && dio->op == REQ_OP_READ && dio->should_dirty) { bio_check_pages_dirty(bio); /* transfers ownership */ } else { - bio_for_each_segment_all(bvec, bio, i) { + struct bvec_iter_all iter_all; + + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; if (dio->op == REQ_OP_READ && !PageCompound(page) && diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c index 5331a15a61f1..24a8e34882e9 100644 --- a/fs/exofs/ore.c +++ b/fs/exofs/ore.c @@ -420,8 +420,9 @@ static void _clear_bio(struct bio *bio) { struct bio_vec *bv; unsigned i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bv, bio, i) { + bio_for_each_segment_all(bv, bio, i, iter_all) { unsigned this_count = bv->bv_len; if (likely(PAGE_SIZE == this_count)) diff --git a/fs/exofs/ore_raid.c b/fs/exofs/ore_raid.c index 199590f36203..e83bab54b03e 100644 --- a/fs/exofs/ore_raid.c +++ b/fs/exofs/ore_raid.c @@ -468,11 +468,12 @@ static void _mark_read4write_pages_uptodate(struct ore_io_state *ios, int ret) /* loop on all devices all pages */ for (d = 0; d < ios->numdevs; d++) { struct bio *bio = ios->per_dev[d].bio; + struct bvec_iter_all iter_all; if (!bio) continue; - bio_for_each_segment_all(bv, bio, i) { + bio_for_each_segment_all(bv, bio, i, iter_all) { struct page *page = bv->bv_page; SetPageUptodate(page); diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 2aa62d58d8dd..cff4c4aa7a9c 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -63,8 +63,9 @@ static void ext4_finish_bio(struct bio *bio) { int i; struct bio_vec *bvec; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; #ifdef CONFIG_EXT4_FS_ENCRYPTION struct page *data_page = NULL; diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c index 6aa282ee455a..e53639784892 100644 --- a/fs/ext4/readpage.c +++ b/fs/ext4/readpage.c @@ -72,6 +72,7 @@ static void mpage_end_io(struct bio *bio) { struct bio_vec *bv; int i; + struct bvec_iter_all iter_all; if (ext4_bio_encrypted(bio)) { if (bio->bi_status) { @@ -81,7 +82,7 @@ static void mpage_end_io(struct bio *bio) return; } } - bio_for_each_segment_all(bv, bio, i) { + bio_for_each_segment_all(bv, bio, i, iter_all) { struct page *page = bv->bv_page; if (!bio->bi_status) { diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index f91d8630c9a2..da060b77f64d 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -87,8 +87,9 @@ static void __read_end_io(struct bio *bio) struct page *page; struct bio_vec *bv; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bv, bio, i) { + bio_for_each_segment_all(bv, bio, i, iter_all) { page = bv->bv_page; /* PG_error was set if any post_read step failed */ @@ -164,13 +165,14 @@ static void f2fs_write_end_io(struct bio *bio) struct f2fs_sb_info *sbi = bio->bi_private; struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; if (time_to_inject(sbi, FAULT_WRITE_IO)) { f2fs_show_injection_info(FAULT_WRITE_IO); bio->bi_status = BLK_STS_IOERR; } - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; enum count_type type = WB_DATA_TYPE(page); @@ -347,6 +349,7 @@ static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, struct bio_vec *bvec; struct page *target; int i; + struct bvec_iter_all iter_all; if (!io->bio) return false; @@ -354,7 +357,7 @@ static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, if (!inode && !page && !ino) return true; - bio_for_each_segment_all(bvec, io->bio, i) { + bio_for_each_segment_all(bvec, io->bio, i, iter_all) { if (bvec->bv_page->mapping) target = bvec->bv_page; diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 94dcab655bc0..ef68bf6232e7 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -170,7 +170,8 @@ u64 gfs2_log_bmap(struct gfs2_sbd *sdp) * that is pinned in the pagecache. */ -static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec, +static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, + struct bio_vec *bvec, blk_status_t error) { struct buffer_head *bh, *next; @@ -208,6 +209,7 @@ static void gfs2_end_log_write(struct bio *bio) struct bio_vec *bvec; struct page *page; int i; + struct bvec_iter_all iter_all; if (bio->bi_status) { fs_err(sdp, "Error %d writing to journal, jid=%u\n", @@ -215,7 +217,7 @@ static void gfs2_end_log_write(struct bio *bio) wake_up(&sdp->sd_logd_waitq); } - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { page = bvec->bv_page; if (page_has_buffers(page)) gfs2_end_log_write_bh(sdp, bvec, bio->bi_status); diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c index be9c0bf697fe..3201342404a7 100644 --- a/fs/gfs2/meta_io.c +++ b/fs/gfs2/meta_io.c @@ -190,8 +190,9 @@ static void gfs2_meta_read_endio(struct bio *bio) { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, i, iter_all) { struct page *page = bvec->bv_page; struct buffer_head *bh = page_buffers(page); unsigned int len = bvec->bv_len; diff --git a/fs/iomap.c b/fs/iomap.c index a3088fae567b..af736acd9006 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -267,8 +267,9 @@ iomap_read_end_io(struct bio *bio) int error = blk_status_to_errno(bio->bi_status); struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) + bio_for_each_segment_all(bvec, bio, i, iter_all) iomap_read_page_end_io(bvec, error); bio_put(bio); } @@ -1559,8 +1560,9 @@ static void iomap_dio_bio_end_io(struct bio *bio) } else { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bvec, bio, i) + bio_for_each_segment_all(bvec, bio, i, iter_all) put_page(bvec->bv_page); bio_put(bio); } diff --git a/fs/mpage.c b/fs/mpage.c index c820dc9bebab..3f19da75178b 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -48,8 +48,9 @@ static void mpage_end_io(struct bio *bio) { struct bio_vec *bv; int i; + struct bvec_iter_all iter_all; - bio_for_each_segment_all(bv, bio, i) { + bio_for_each_segment_all(bv, bio, i, iter_all) { struct page *page = bv->bv_page; page_endio(page, bio_op(bio), blk_status_to_errno(bio->bi_status)); diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 338b9d9984e0..1f1829e506e8 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -62,7 +62,7 @@ xfs_find_daxdev_for_inode( static void xfs_finish_page_writeback( struct inode *inode, - struct bio_vec *bvec, + struct bio_vec *bvec, int error) { struct iomap_page *iop = to_iomap_page(bvec->bv_page); @@ -98,6 +98,7 @@ xfs_destroy_ioend( for (bio = &ioend->io_inline_bio; bio; bio = next) { struct bio_vec *bvec; int i; + struct bvec_iter_all iter_all; /* * For the last bio, bi_private points to the ioend, so we @@ -109,7 +110,7 @@ xfs_destroy_ioend( next = bio->bi_private; /* walk each page on bio, ending page IO on them */ - bio_for_each_segment_all(bvec, bio, i) + bio_for_each_segment_all(bvec, bio, i, iter_all) xfs_finish_page_writeback(inode, bvec, error); bio_put(bio); } diff --git a/include/linux/bio.h b/include/linux/bio.h index 06888d45beb4..c5231e5c7e85 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -128,12 +128,19 @@ static inline bool bio_full(struct bio *bio) return bio->bi_vcnt >= bio->bi_max_vecs; } +#define bvec_for_each_segment(bv, bvl, i, iter_all) \ + for (bv = bvec_init_iter_all(&iter_all); \ + (iter_all.done < (bvl)->bv_len) && \ + (bvec_next_segment((bvl), &iter_all), 1); \ + iter_all.done += bv->bv_len, i += 1) + /* * drivers should _never_ use the all version - the bio may have been split * before it got to the driver and the driver won't own all of it */ -#define bio_for_each_segment_all(bvl, bio, i) \ - for (i = 0, bvl = (bio)->bi_io_vec; i < (bio)->bi_vcnt; i++, bvl++) +#define bio_for_each_segment_all(bvl, bio, i, iter_all) \ + for (i = 0, iter_all.idx = 0; iter_all.idx < (bio)->bi_vcnt; iter_all.idx++) \ + bvec_for_each_segment(bvl, &((bio)->bi_io_vec[iter_all.idx]), i, iter_all) static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, unsigned bytes) diff --git a/include/linux/bvec.h b/include/linux/bvec.h index ca6e630f88ab..94620cf01762 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -45,6 +45,12 @@ struct bvec_iter { current bvec */ }; +struct bvec_iter_all { + struct bio_vec bv; + int idx; + unsigned done; +}; + /* * various member access, note that bio_data should of course not be used * on highmem page vectors @@ -131,6 +137,30 @@ static inline bool bvec_iter_advance(const struct bio_vec *bv, .bi_bvec_done = 0, \ } +static inline struct bio_vec *bvec_init_iter_all(struct bvec_iter_all *iter_all) +{ + iter_all->bv.bv_page = NULL; + iter_all->done = 0; + + return &iter_all->bv; +} + +static inline void bvec_next_segment(const struct bio_vec *bvec, + struct bvec_iter_all *iter_all) +{ + struct bio_vec *bv = &iter_all->bv; + + if (bv->bv_page) { + bv->bv_page = nth_page(bv->bv_page, 1); + bv->bv_offset = 0; + } else { + bv->bv_page = bvec->bv_page; + bv->bv_offset = bvec->bv_offset; + } + bv->bv_len = min_t(unsigned int, PAGE_SIZE - bv->bv_offset, + bvec->bv_len - iter_all->done); +} + /* * Get the last single-page segment from the multi-page bvec and store it * in @seg

[V13,14/19] block: allow bio_for_each_segment_all() to iterate over multi-page bvec

Commit Message

Patch