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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO | COLOPHON |
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io_uring_prep_fsync(3) liburing Manual io_uring_prep_fsync(3)
io_uring_prep_fsync - prepare an fsync request
#include <liburing.h>
void io_uring_prep_fsync(struct io_uring_sqe *sqe,
int fd,
unsigned flags);
The io_uring_prep_fsync(3) function prepares an fsync request.
The submission queue entry sqe is setup to use the file
descriptor fd that should get synced, with the modifier flags
indicated by the flags argument.
This function prepares an fsync request. It can act either like
an fsync(2) operation, which is the default behavior. If
IORING_FSYNC_DATASYNC is set in the flags argument, then it
behaves like fdatasync(2). If no range is specified, the fd will
be synced from 0 to end-of-file.
It's possible to specify a range to sync, if one is desired. If
the off field of the SQE is set to non-zero, then that indicates
the offset to start syncing at. If len is set in the SQE, then
that indicates the size in bytes to sync from the offset. Note
that these fields are not accepted by this helper, so they have
to be set manually in the SQE after calling this prep helper.
None
The CQE res field will contain the result of the operation. See
the related man page for details on possible values. Note that
where synchronous system calls will return -1 on failure and set
errno to the actual error value, io_uring never uses errno.
Instead it returns the negated errno directly in the CQE res
field.
io_uring_get_sqe(3), io_uring_submit(3), fsync(2), fdatasync(2)
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 io-uring@vger.kernel.org. This page
was obtained from the project's upstream Git repository
⟨https://github.com/axboe/liburing⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-03.) 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
man-pages@man7.org
liburing-2.2 March 12, 2022 io_uring_prep_fsync(3)
Pages that refer to this page: io_uring_prep_fsync(3)
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HTML rendering created 2024-06-26 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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