f2fs: honor per-I/O write streams for direct writes

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io_uring can pass a per-I/O write stream through kiocb->ki_write_stream,
and block direct I/O propagates that value to bio->bi_write_stream.

F2FS added FDP stream mapping for DATA writes, but its direct write
submit hook always rewrites bio->bi_write_stream from the inode write
hint and F2FS temperature. As a result, a direct write with an explicit
io_uring write_stream is submitted to the F2FS-selected stream instead
of the user-requested stream.

Validate an explicit write stream before starting F2FS direct I/O, pass
the kiocb through the iomap private pointer, and preserve the per-I/O
stream in the direct write bio. When no per-I/O stream is supplied, keep
using the existing F2FS temperature-to-stream mapping.

Fixes: 42f7a7a50a33 ("f2fs: map data writes to FDP streams")
Signed-off-by: Wenjie Qi <qiwenjie@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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Wenjie Qi 2026-05-22 14:12:06 +08:00 • committed by Jaegeuk Kim

parent 8712353ed8

commit 28ebb922b9

1 changed files with 23 additions and 1 deletions

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fs/f2fs/file.c

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