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io_uring: correct check for O_TMPFILE 

O_TMPFILE is actually __O_TMPFILE|O_DIRECTORY. This means that the old
check for whether RESOLVE_CACHED can be used would incorrectly think
that O_DIRECTORY could not be used with RESOLVE_CACHED.

Cc: stable@vger.kernel.org # v5.12+
Fixes: 3a81fd0204 ("io_uring: enable LOOKUP_CACHED path resolution for filename lookups")
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Link: https://lore.kernel.org/r/20230807-resolve_cached-o_tmpfile-v3-1-e49323e1ef6f@cyphar.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Aleksa Sarai 2023-08-07 12:24:15 +10:00 committed by Jens Axboe
parent 52a93d39b1
commit 72dbde0f2a
1 changed files with 4 additions and 2 deletions
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6
io_uring/openclose.c
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@ -35,9 +35,11 @@ static bool io_openat_force_async(struct io_open *open)
{
/*
* Don't bother trying for O_TRUNC, O_CREAT, or O_TMPFILE open,
* it'll always -EAGAIN
* it'll always -EAGAIN. Note that we test for __O_TMPFILE because
* O_TMPFILE includes O_DIRECTORY, which isn't a flag we need to force
* async for.
*/
return open->how.flags & (O_TRUNC | O_CREAT | O_TMPFILE);
return open->how.flags & (O_TRUNC | O_CREAT | __O_TMPFILE);
}
static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)