[PATCH v2 0/3] btrfs-progs: avoid repeated data write for metadata and a small cleanup

[Qu Wenruo <wqu@suse.com>]

[CHANGELOG]
v2:
- Separate the fixes from the initial patch
- Fix a bug in BUG_ON() condition which causes mkfs test failure

There is a bug report from Shinichiro that for zoned device mkfs -m DUP
(using RST) doesn't work.

It turns out to be a bug in commit 2a93728391a1 ("btrfs-progs: use
write_data_to_disk() to replace write_extent_to_disk()"), which I
wrongly assumed that write_data_to_disk() will only write the data to
one mirror.

In fact, write_data_to_disk() writes data to all mirrors, thus the
@mirror argument is completely unnecessary.

The first patch will fix the problem and cleanup the unnecessary
argument to avoid confusion.

Then the 2nd patch will fix a BUG_ON() condition.

Finally the last patch will cleanup write_and_map_eb() to completely
rely on write_data_to_disk(), without manually handling RAID56. 


Qu Wenruo (3):
  btrfs-progs: avoid repeated data write for metadata
  btrfs-progs: fix a BUG_ON() condition for write_data_to_disk()
  btrfs-progs: use write_data_to_disk() to handle RAID56 in
    write_and_map_eb()

 image/main.c              |  2 +-
 kernel-shared/disk-io.c   | 39 +++------------------------------------
 kernel-shared/extent_io.c | 12 +++++++++---
 kernel-shared/extent_io.h |  2 +-
 4 files changed, 14 insertions(+), 41 deletions(-)

-- 
2.37.0