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man/io_uring_prep_fallocate.3
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Jens Axboe
Update io_uring_prep_fallocate() to use 64-bit length/offset
20 мар 2023, 17:54
20 мар 2023, 17:54
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.\" Copyright (C) 2022 Jens Axboe <axboe@kernel.dk> .\" .\" SPDX-License-Identifier: LGPL-2.0-or-later .\" .TH io_uring_prep_fallocate 3 "March 13, 2022" "liburing-2.2" "liburing Manual" .SH NAME io_uring_prep_fallocate \- prepare a fallocate request .SH SYNOPSIS .nf .B #include <fcntl.h> .B #include <liburing.h> .PP .BI "void io_uring_prep_fallocate(struct io_uring_sqe *" sqe "," .BI " int " fd "," .BI " int " mode "," .BI " __u64 " offset "," .BI " __u64 " len ");" .fi .SH DESCRIPTION .PP The .BR io_uring_prep_fallocate (3) function prepares a fallocate request. The submission queue entry .I sqe is setup to use the file descriptor pointed to by .I fd to start a fallocate operation described by .I mode at offset .I offset and .I len length in bytes. This function prepares an async .BR fallocate (2) request. See that man page for details. .SH RETURN VALUE None .SH ERRORS The CQE .I 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 .B -1 on failure and set .I errno to the actual error value, io_uring never uses .IR errno . Instead it returns the negated .I errno directly in the CQE .I res field. .SH SEE ALSO .BR io_uring_get_sqe (3), .BR io_uring_submit (3), .BR fallocate (2)