[v14,28/42] btrfs: enable zone append writing for direct IO

Commit Message

Naohiro Aota Jan. 26, 2021, 2:25 a.m. UTC

Likewise to buffered IO, enable zone append writing for direct IO when its
used on a zoned block device.

Reviewed-by: Josef Bacik <[e-mail]>
Signed-off-by: Naohiro Aota <[e-mail]>
---
 fs/btrfs/inode.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

Patch

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e3e4b4f7c0d7..a9bf78eaed42 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7743,6 +7743,9 @@  static int btrfs_dio_iomap_begin(struct inode *inode, loff_t start,
 	iomap->bdev = fs_info->fs_devices->latest_bdev;
 	iomap->length = len;
 
+	if (write && btrfs_use_zone_append(BTRFS_I(inode), em))
+		iomap->flags |= IOMAP_F_ZONE_APPEND;
+
 	free_extent_map(em);
 
 	return 0;
@@ -7969,6 +7972,8 @@  static void btrfs_end_dio_bio(struct bio *bio)
 	if (err)
 		dip->dio_bio->bi_status = err;
 
+	btrfs_record_physical_zoned(dip->inode, dip->logical_offset, bio);
+
 	bio_put(bio);
 	btrfs_dio_private_put(dip);
 }
@@ -8121,6 +8126,19 @@  static blk_qc_t btrfs_submit_direct(struct inode *inode, struct iomap *iomap,
 		bio->bi_end_io = btrfs_end_dio_bio;
 		btrfs_io_bio(bio)->logical = file_offset;
 
+		WARN_ON_ONCE(write && btrfs_is_zoned(fs_info) &&
+			     fs_info->max_zone_append_size &&
+			     bio_op(bio) != REQ_OP_ZONE_APPEND);
+
+		if (bio_op(bio) == REQ_OP_ZONE_APPEND) {
+			status = extract_ordered_extent(BTRFS_I(inode), bio,
+							file_offset);
+			if (status) {
+				bio_put(bio);
+				goto out_err;
+			}
+		}
+
 		ASSERT(submit_len >= clone_len);
 		submit_len -= clone_len;