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io_uring_prep_fadvise(3) — Linux manual page

io_uring_prep_fadvise(3)     liburing Manualio_uring_prep_fadvise(3)

NAME        top

       io_uring_prep_fadvise - prepare a fadvise request

SYNOPSIS        top

#include <fcntl.h>#include <liburing.h>void io_uring_prep_fadvise(struct io_uring_sqe *sqe,intfd,__u64offset,__u32len,intadvice);void io_uring_prep_fadvise64(struct io_uring_sqe *sqe,intfd,__u64offset,off_tlen,intadvice);

DESCRIPTION        top

       Theio_uring_prep_fadvise(3) function prepares an fadvise request.       The submission queue entrysqe is setup to use the file descriptor       pointed to byfd to start an fadvise operation atoffset and oflen length in bytes, giving it the advise located inadvice.       Theio_uring_prep_fadvise64(3) function works likeio_uring_prep_fadvise(3) except that it takes a 64-bit length       rather than just a 32-bit one. Older kernels may not support the       64-bit length variant. If this variant is attempted used on a       kernel that doesn't support 64-bit lengths, then the request will       get errored with-EINVALin the results field of the CQE.       This function prepares an asyncposix_fadvise(2) request. See that       man page for details.

RETURN VALUE        top

       None

ERRORS        top

       The CQEres 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-1on failure and seterrno to the actual error value, io_uring never useserrno.       Instead it returns the negatederrno directly in the CQEres       field.

SEE ALSO        top

io_uring_get_sqe(3),io_uring_submit(3),io_uring_register(2),posix_fadvise(2)

COLOPHON        top

       This page is part of theliburing (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 isnot part of the original manual page), send a mail to       man-pages@man7.orgliburing-2.2                  March 13, 2022io_uring_prep_fadvise(3)

Pages that refer to this page:io_uring_prep_fadvise(3), io_uring_prep_fadvise64(3)

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