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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO | COLOPHON |
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io_uring_prep_fallocate(3) liburing Manual io_uring_prep_fallocate(3)
io_uring_prep_fallocate - prepare a fallocate request
#include <fcntl.h>
#include <liburing.h>
void io_uring_prep_fallocate(struct io_uring_sqe *sqe,
int fd,
int mode,
__u64 offset,
__u64 len);
The io_uring_prep_fallocate(3) function prepares a fallocate
request. The submission queue entry sqe is setup to use the file
descriptor pointed to by fd to start a fallocate operation
described by mode at offset offset and len length in bytes.
This function prepares an async fallocate(2) request. See that man
page for details.
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), fallocate(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 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
man-pages@man7.org
liburing-2.2 March 13, 2022 io_uring_prep_fallocate(3)
Pages that refer to this page: io_uring_prep_fallocate(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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