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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | NOTES | SEE ALSO | COLOPHON |
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io_uring_prep_linkat(3) liburing Manual io_uring_prep_linkat(3)
io_uring_prep_linkat - prepare a linkat request
#include <fcntl.h>
#include <unistd.h>
#include <liburing.h>
void io_uring_prep_linkat(struct io_uring_sqe *sqe,
int olddirfd,
const char *oldpath,
int newdirfd,
const char *newpath,
int flags);
void io_uring_prep_link(struct io_uring_sqe *sqe,
const char *oldpath,
const char *newpath,
int flags);
The io_uring_prep_linkat(3) function prepares a linkat request.
The submission queue entry sqe is setup to use the old directory
file descriptor pointed to by olddirfd and old path pointed to by
oldpath with the new directory file descriptor pointed to by
newdirfd and the new path pointed to by newpath and using the
specified flags in flags.
The io_uring_prep_link(3) function prepares a link request. The
submission queue entry sqe is setup to use the old path pointed
to by oldpath and the new path pointed to by newpath, both
relative to the current working directory and using the specified
flags in flags.
These functions prepare an async linkat(2) or link(2) request.
See those man pages 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.
As with any request that passes in data in a struct, that data
must remain valid until the request has been successfully
submitted. It need not remain valid until completion. Once a
request has been submitted, the in-kernel state is stable. Very
early kernels (5.4 and earlier) required state to be stable until
the completion occurred. Applications can test for this behavior
by inspecting the IORING_FEAT_SUBMIT_STABLE flag passed back from
io_uring_queue_init_params(3).
io_uring_get_sqe(3), io_uring_submit(3), linkat(2), link(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 [email protected]. 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
[email protected]
liburing-2.2 March 13, 2022 io_uring_prep_linkat(3)
Pages that refer to this page: io_uring_prep_link(3), io_uring_prep_linkat(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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