f2fs: allow pinning empty compressed files

Commit a64a3fec11e7 ("f2fs: force out-place update for all writes on
compressed file") updated f2fs_should_update_outplace() to always
return true for compressed files. However, this function is also
called during f2fs_ioc_set_pin_file() validation, so pinning an
empty file with compression enabled now fails with -EINVAL before the
compression flag can be stripped.

Fix this by guarding the f2fs_compressed_file(inode) check with fio in
f2fs_should_update_outplace(). This preserves forced OPU for actual
compressed writes (fio != NULL), while allowing f2fs_ioc_set_pin_file()
(fio == NULL) to proceed to f2fs_disable_compressed_file(inode).

Cc: stable@kernel.org
Fixes: a64a3fec11e7 ("f2fs: force out-place update for all writes on compressed file")
Assisted-by: LLM
Signed-off-by: Joanne Chang <joannechien@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

0 files changed, 0 insertions, 0 deletions