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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO | COLOPHON |
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io_uring_pr...ink_timeout(3) liburing Manual io_uring_pr...ink_timeout(3)
io_uring_prep_link_timeout - a timeout request for linked sqes
#include <liburing.h>
void io_uring_prep_link_timeout(struct io_uring_sqe *sqe,
struct __kernel_timespec *ts,
unsigned flags);
The io_uring_prep_link_timeout(3) function prepares a timeout
request for linked sqes. The submission queue entry sqe is
setup for with timeout specified by ts. The flags argument holds
modifier flags for the timeout behaviour of the request.
The ts argument must be filled in with the appropriate information
for the timeout. It looks as follows:
struct __kernel_timespec {
__kernel_time64_t tv_sec;
long long tv_nsec;
};
The flags argument may contain:
IORING_TIMEOUT_ABS
The value specified in ts is an absolute value rather than
a relative one.
IORING_TIMEOUT_BOOTTIME
The boottime clock source should be used.
IORING_TIMEOUT_REALTIME
The realtime clock source should be used.
IORING_TIMEOUT_ETIME_SUCCESS
Consider an expired timeout a success in terms of the
posted completion.
It is invalid to create a chain (linked sqes) consisting only of a
link timeout request. If all the requests in the chain are
completed before timeout, then the link timeout request gets
canceled. Upon timeout, all the uncompleted requests in the chain
get canceled.
None
These are the errors that are reported in the CQE res field. On
success, 0 is returned.
-ETIME The specified timeout occurred and triggered the completion
event.
-EINVAL
One of the fields set in the SQE was invalid. For example,
two clock sources where given, or the specified timeout
seconds or nanoseconds where < 0.
-EFAULT
io_uring was unable to access the data specified by ts.
-ECANCELED
The timeout was canceled because all submitted requests
were completed successfully or one of the requests resulted
in failure.
-ENOENT
The request to which the linked timeout was linked already
completed and could not be found when the timer expired.
io_uring_get_sqe(3), io_uring_prep_timeout(3)
This page is part of the liburing (A library for io_uring)
project. Information about the project can be found at
⟨https://github.com/axboe/liburing⟩. If you have a bug report for
this manual page, send it to [email protected]. This page
was obtained from the project's upstream Git repository
⟨https://github.com/axboe/liburing⟩ on 2025-08-11. (At that time,
the date of the most recent commit that was found in the
repository was 2025-08-02.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
liburing-2.4 January 23, 2023io_uring_pr...ink_timeout(3)
Pages that refer to this page: io_uring_prep_futex_wait(3), io_uring_prep_futex_waitv(3), io_uring_prep_link_timeout(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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