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Diffstat (limited to 'man/io_uring_submit.3')
| -rw-r--r-- | man/io_uring_submit.3 | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/man/io_uring_submit.3 b/man/io_uring_submit.3 new file mode 100644 index 0000000..f871b89 --- /dev/null +++ b/man/io_uring_submit.3 @@ -0,0 +1,46 @@ +.\" Copyright (C) 2021 Stefan Roesch <shr@fb.com> +.\" +.\" SPDX-License-Identifier: LGPL-2.0-or-later +.\" +.TH io_uring_submit 3 "November 15, 2021" "liburing-2.1" "liburing Manual" +.SH NAME +io_uring_submit \- submit requests to the submission queue +.SH SYNOPSIS +.nf +.B #include <liburing.h> +.PP +.BI "int io_uring_submit(struct io_uring *" ring ");" +.fi +.SH DESCRIPTION +.PP +The +.BR io_uring_submit (3) +function submits the next events to the submission queue belonging to the +.IR ring . + +After the caller retrieves a submission queue entry (SQE) with +.BR io_uring_get_sqe (3) +and prepares the SQE using one of the provided helpers, it can be submitted with +.BR io_uring_submit (3) . + +.SH RETURN VALUE +On success +.BR io_uring_submit (3) +returns the number of submitted submission queue entries. On failure it returns +.BR -errno . +.SH NOTES +For any request that passes in data in a struct, that data must remain +valid until the request has been successfully submitted. It need not remain +valid until completion. Once a request has been submitted, the in-kernel +state is stable. Very early kernels (5.4 and earlier) required state to be +stable until the completion occurred. Applications can test for this +behavior by inspecting the +.B IORING_FEAT_SUBMIT_STABLE +flag passed back from +.BR io_uring_queue_init_params (3). +In general, the man pages for the individual prep helpers will have a note +mentioning this fact as well, if required for the given command. +.SH SEE ALSO +.BR io_uring_get_sqe (3), +.BR io_uring_submit_and_wait (3), +.BR io_uring_submit_and_wait_timeout (3) |