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fs/dax: Reject IOCB_ATOMIC in dax_iomap_rw()

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The DAX write path does not support IOCB_ATOMIC, so reject it when set.

Suggested-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
This commit is contained in:
John Garry 2025-07-24 08:12:13 +00:00 committed by Carlos Maiolino
parent 82efde9cf2
commit e7fb9b7132
1 changed files with 3 additions and 0 deletions
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3
fs/dax.c
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@ -1743,6 +1743,9 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
loff_t done = 0;
int ret;
if (WARN_ON_ONCE(iocb->ki_flags & IOCB_ATOMIC))
return -EIO;
if (!iomi.len)
return 0;