diff options
| author | Jens Axboe <axboe@kernel.dk> | 2022-05-05 21:47:55 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-05-18 06:12:42 -0600 |
| commit | 3d200242a6c968af321913b635fc4014b238cba4 (patch) | |
| tree | 7a82f54ec9edd4fe9db7297d2b6f1983a3ff739e /fs | |
| parent | e7637a492b9f1ae6b7cfcecf0aed5e4c76efa3bd (diff) | |
| download | linux-3d200242a6c968af321913b635fc4014b238cba4.tar.bz2 | |
io_uring: add buffer selection support to IORING_OP_NOP
Obviously not really useful since it's not transferring data, but it
is helpful in benchmarking overhead of provided buffers.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/io_uring.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 2322583f9275..dc129c74ed1e 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1058,6 +1058,7 @@ static const struct io_op_def io_op_defs[] = { [IORING_OP_NOP] = { .audit_skip = 1, .iopoll = 1, + .buffer_select = 1, }, [IORING_OP_READV] = { .needs_file = 1, @@ -4538,7 +4539,17 @@ done: */ static int io_nop(struct io_kiocb *req, unsigned int issue_flags) { - __io_req_complete(req, issue_flags, 0, 0); + void __user *buf; + + if (req->flags & REQ_F_BUFFER_SELECT) { + size_t len = 1; + + buf = io_buffer_select(req, &len, issue_flags); + if (IS_ERR(buf)) + return PTR_ERR(buf); + } + + __io_req_complete(req, issue_flags, 0, io_put_kbuf(req, issue_flags)); return 0; } |