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| author | Dylan Yudaken <dylany@meta.com> | 2023-01-27 16:52:27 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-01-30 01:18:26 +0300 |
| commit | 0ffae640ad83de46865c6b8dc3fda370823e4f1d (patch) | |
| tree | 529cdaec83da4065a36cecf7e511dcf18ce6ad79 | |
| parent | c31cc60fddd11134031e7f9eb76812353cfaac84 (diff) | |
| download | linux-0ffae640ad83de46865c6b8dc3fda370823e4f1d.tar.xz | |
io_uring: always go async for unsupported open flags
No point in issuing -> return -EAGAIN -> go async, when it can be done upfront.
Signed-off-by: Dylan Yudaken <dylany@meta.com>
Link: https://lore.kernel.org/r/20230127135227.3646353-5-dylany@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | io_uring/openclose.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/io_uring/openclose.c b/io_uring/openclose.c index 67178e4bb282..a1b98c81a52d 100644 --- a/io_uring/openclose.c +++ b/io_uring/openclose.c @@ -31,6 +31,15 @@ struct io_close { u32 file_slot; }; +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 + */ + 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) { struct io_open *open = io_kiocb_to_cmd(req, struct io_open); @@ -61,6 +70,8 @@ static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe open->nofile = rlimit(RLIMIT_NOFILE); req->flags |= REQ_F_NEED_CLEANUP; + if (io_openat_force_async(open)) + req->flags |= REQ_F_FORCE_ASYNC; return 0; } @@ -108,12 +119,7 @@ int io_openat2(struct io_kiocb *req, unsigned int issue_flags) nonblock_set = op.open_flag & O_NONBLOCK; resolve_nonblock = open->how.resolve & RESOLVE_CACHED; if (issue_flags & IO_URING_F_NONBLOCK) { - /* - * Don't bother trying for O_TRUNC, O_CREAT, or O_TMPFILE open, - * it'll always -EAGAIN - */ - if (open->how.flags & (O_TRUNC | O_CREAT | O_TMPFILE)) - return -EAGAIN; + WARN_ON_ONCE(io_openat_force_async(open)); op.lookup_flags |= LOOKUP_CACHED; op.open_flag |= O_NONBLOCK; } |