Update liburing to version 2.2

Merge branch 'liburingtag2_2' into liburing_upgrade

Test: atest liburing_cpp_tests
Bug: b/253385258
Change-Id: Ia9b4acfce599cd0f7a2ab22999e64d107bc1b96c

1 files changed, 85 insertions, 0 deletions

diff --git a/man/io_uring_prep_symlinkat.3 b/man/io_uring_prep_symlinkat.3
new file mode 100644
index 0000000..0fa7056
--- /dev/null
+++ b/man/io_uring_prep_symlinkat.3
@@ -0,0 +1,85 @@
+.\" Copyright (C) 2022 Jens Axboe <axboe@kernel.dk>
+.\"
+.\" SPDX-License-Identifier: LGPL-2.0-or-later
+.\"
+.TH io_uring_prep_symlinkat 3 "March 13, 2022" "liburing-2.2" "liburing Manual"
+.SH NAME
+io_uring_prep_symlinkat \- prepare a symlinkat request
+.SH SYNOPSIS
+.nf
+.B #include <fcntl.h>
+.B #include <unistd.h>
+.B #include <liburing.h>
+.PP
+.BI "void io_uring_prep_symlinkat(struct io_uring_sqe *" sqe ","
+.BI "                             const char *" target ","
+.BI "                             int " newdirfd ","
+.BI "                             const char *" linkpath ");"
+.PP
+.BI "void io_uring_prep_symlink(struct io_uring_sqe *" sqe ","
+.BI "                           const char *" target ","
+.BI "                           const char *" linkpath ");"
+.fi
+.SH DESCRIPTION
+.PP
+The
+.BR io_uring_prep_symlinkat (3)
+function prepares a symlinkat request. The submission queue entry
+.I sqe
+is setup to symlink the target path pointed to by
+.I target
+to the new destination indicated by
+.I newdirfd
+and
+.IR linkpath .
+
+The
+.BR io_uring_prep_symlink (3)
+function prepares a symlink request. The submission queue entry
+.I sqe
+is setup to symlink the target path pointed to by
+.I target
+to the new destination indicated by
+.I linkpath
+relative to the the current working directory. This function prepares an async
+.BR symlink (2)
+request. See that man page for details.
+
+These functions prepare an async
+.BR symlinkat (2)
+or
+.BR symlink (2)
+request. See those man pages 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 NOTES
+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
+.B IORING_FEAT_SUBMIT_STABLE
+flag passed back from
+.BR io_uring_queue_init_params (3).
+.SH SEE ALSO
+.BR io_uring_get_sqe (3),
+.BR io_uring_submit (3),
+.BR symlinkat (2),
+.BR symlink (2)