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Wong" , Naohiro Aota Subject: [PATCH v10 21/41] btrfs: use bio_add_zone_append_page for zoned btrfs Date: Tue, 10 Nov 2020 20:26:24 +0900 Message-Id: <190a0c66e8debf9017e91ceccf05320451b4529e.1605007036.git.naohiro.aota@wdc.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Zoned device has its own hardware restrictions e.g. max_zone_append_size when using REQ_OP_ZONE_APPEND. To follow the restrictions, use bio_add_zone_append_page() instead of bio_add_page(). We need target device to use bio_add_zone_append_page(), so this commit reads the chunk information to memoize the target device to btrfs_io_bio(bio)->device. Currently, zoned btrfs only supports SINGLE profile. In the feature, btrfs_io_bio can hold extent_map and check the restrictions for all the devices the bio will be mapped. Signed-off-by: Naohiro Aota --- fs/btrfs/extent_io.c | 30 +++++++++++++++++++++++++++--- 1 file changed, 27 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 868ae0874a34..b9b366f4d942 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3033,6 +3033,7 @@ static bool btrfs_bio_add_page(struct bio *bio, struct page *page, u64 logical, { sector_t sector = logical >> SECTOR_SHIFT; bool contig; + int ret; if (prev_bio_flags != bio_flags) return false; @@ -3047,7 +3048,12 @@ static bool btrfs_bio_add_page(struct bio *bio, struct page *page, u64 logical, if (btrfs_bio_fits_in_stripe(page, size, bio, bio_flags)) return false; - return bio_add_page(bio, page, size, pg_offset) == size; + if (bio_op(bio) == REQ_OP_ZONE_APPEND) + ret = bio_add_zone_append_page(bio, page, size, pg_offset); + else + ret = bio_add_page(bio, page, size, pg_offset); + + return ret == size; } /* @@ -3078,7 +3084,9 @@ static int submit_extent_page(unsigned int opf, int ret = 0; struct bio *bio; size_t page_size = min_t(size_t, size, PAGE_SIZE); - struct extent_io_tree *tree = &BTRFS_I(page->mapping->host)->io_tree; + struct btrfs_inode *inode = BTRFS_I(page->mapping->host); + struct extent_io_tree *tree = &inode->io_tree; + struct btrfs_fs_info *fs_info = inode->root->fs_info; ASSERT(bio_ret); @@ -3109,11 +3117,27 @@ static int submit_extent_page(unsigned int opf, if (wbc) { struct block_device *bdev; - bdev = BTRFS_I(page->mapping->host)->root->fs_info->fs_devices->latest_bdev; + bdev = fs_info->fs_devices->latest_bdev; bio_set_dev(bio, bdev); wbc_init_bio(wbc, bio); wbc_account_cgroup_owner(wbc, page, page_size); } + if (btrfs_is_zoned(fs_info) && + bio_op(bio) == REQ_OP_ZONE_APPEND) { + struct extent_map *em; + struct map_lookup *map; + + em = btrfs_get_chunk_map(fs_info, offset, page_size); + if (IS_ERR(em)) + return PTR_ERR(em); + + map = em->map_lookup; + /* We only support SINGLE profile for now */ + ASSERT(map->num_stripes == 1); + btrfs_io_bio(bio)->device = map->stripes[0].dev; + + free_extent_map(em); + } *bio_ret = bio; -- 2.27.0