1io_uring_prep_linkat(3)         liburing Manual        io_uring_prep_linkat(3)
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NAME

6       io_uring_prep_linkat - prepare a linkat request
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SYNOPSIS

9       #include <fcntl.h>
10       #include <unistd.h>
11       #include <liburing.h>
12
13       void io_uring_prep_linkat(struct io_uring_sqe *sqe,
14                                 int olddirfd,
15                                 const char *oldpath,
16                                 int newdirfd,
17                                 const char *newpath,
18                                 int flags);
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20       void io_uring_prep_link(struct io_uring_sqe *sqe,
21                               const char *oldpath,
22                               const char *newpath,
23                               int flags);
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DESCRIPTION

26       The  io_uring_prep_linkat(3)  function  prepares  a linkat request. The
27       submission queue entry sqe is setup to use the old directory  file  de‐
28       scriptor pointed to by olddirfd and old path pointed to by oldpath with
29       the new directory file descriptor pointed to by newdirfd  and  the  new
30       path pointed to by newpath and using the specified flags in flags.
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32       The io_uring_prep_link(3) function prepares a link request. The submis‐
33       sion queue entry sqe is setup to use the old path pointed to by oldpath
34       and  the  new  path pointed to by newpath, both relative to the current
35       working directory and using the specified flags in flags.
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37       These functions prepare an async  linkat(2)  or  link(2)  request.  See
38       those man pages for details.
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RETURN VALUE

42       None
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ERRORS

45       The CQE res field will contain the result of the operation. See the re‐
46       lated man page for details on possible values. Note that where synchro‐
47       nous system calls will return -1 on failure and set errno to the actual
48       error value, io_uring never uses errno.  Instead it returns the negated
49       errno directly in the CQE res field.
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NOTES

52       As with any request that passes in data in a struct, that data must re‐
53       main valid until the request has been successfully submitted.  It  need
54       not  remain  valid until completion. Once a request has been submitted,
55       the in-kernel state is stable. Very early kernels (5.4 and earlier) re‐
56       quired  state  to be stable until the completion occurred. Applications
57       can test for this behavior by inspecting the  IORING_FEAT_SUBMIT_STABLE
58       flag passed back from io_uring_queue_init_params(3).
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SEE ALSO

61       io_uring_get_sqe(3), io_uring_submit(3), linkat(2), link(2)
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65liburing-2.2                    March 13, 2022         io_uring_prep_linkat(3)
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