Adding upstream version 4.22.0.upstream/4.22.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 122 insertions, 0 deletions

diff --git a/upstream/opensuse-leap-15-6/man2/ioctl_xfs_fsinumbers.2 b/upstream/opensuse-leap-15-6/man2/ioctl_xfs_fsinumbers.2
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+.\" Copyright (c) 2019, Oracle.  All rights reserved.
+.\"
+.\" %%%LICENSE_START(GPLv2+_DOC_FULL)
+.\" SPDX-License-Identifier: GPL-2.0+
+.\" %%%LICENSE_END
+.TH IOCTL-XFS-FSINUMBERS 2 2019-06-17 "XFS"
+.SH NAME
+ioctl_xfs_fsinumbers \- extract a list of valid inode numbers from an XFS filesystem
+.SH SYNOPSIS
+.br
+.B #include <xfs/xfs_fs.h>
+.PP
+.BI "int ioctl(int " fd ", XFS_IOC_FSINUMBERS, struct xfs_fsop_bulkreq *" arg );
+.SH DESCRIPTION
+Queries inode allocation information from an XFS filesystem.
+It is intended to be called iteratively to obtain the entire set of inodes.
+These ioctls use
+.B struct xfs_fsop_bulkreq
+to set up a bulk transfer with the kernel:
+.PP
+.in +4n
+.nf
+struct xfs_fsop_bulkreq {
+	__u64   *lastip;
+	__s32   count;
+	void    *ubuffer;
+	__s32   *ocount;
+};
+.fi
+.in
+.PP
+.I lastip
+points to a value that will receive the number of the "last inode."
+This should be set to one less than the number of the first inode for which the
+caller wants information, or zero to start with the first inode in the
+filesystem.
+After the call, this value will be set to the number of the last inode for
+which information is supplied.
+This field will not be updated if
+.I ocount
+is NULL.
+.PP
+.I count
+is the number of elements in the
+.B ubuffer
+array and therefore the number of inode groups for which to return allocation
+information.
+.PP
+.I ocount
+points to a value that will receive the number of records returned.
+An output value of zero means that there are no more inode groups left to
+enumerate.
+If this value is NULL, then neither
+.I ocount
+nor
+.I lastip
+will be updated.
+.PP
+.I ubuffer
+points to a memory buffer where inode group information will be copied.
+This buffer must be an array of
+.B struct xfs_inogrp
+which is described below.
+The array must have at least
+.I count
+elements.
+.PP
+.in +4n
+.nf
+struct xfs_inogrp {
+	__u64   xi_startino;
+	__s32   xi_alloccount;
+	__u64   xi_allocmask;
+}
+.fi
+.in
+.PP
+This structure describes inode usage information for a group of 64 consecutive
+inode numbers.
+The fields are as follows:
+.PP
+.I xi_startino
+is the first inode number of this group.
+.PP
+.I xi_alloccount
+is the number of bits that are set in
+.IR xi_allocmask .
+This is the number of inodes allocated in this group.
+.PP
+.I xi_allocmask
+is a bitmask of inodes that are allocated in this inode group.
+The bitmask is 64 bits long, and the least significant bit corresponds to inode
+.BR xi_startino .
+.SH RETURN VALUE
+On error, \-1 is returned, and
+.I errno
+is set to indicate the error.
+.PP
+.SH ERRORS
+Error codes can be one of, but are not limited to, the following:
+.TP
+.B EFAULT
+The kernel was not able to copy into the userspace buffer.
+.TP
+.B EFSBADCRC
+Metadata checksum validation failed while performing the query.
+.TP
+.B EFSCORRUPTED
+Metadata corruption was encountered while performing the query.
+.TP
+.B EINVAL
+One of the arguments was not valid.
+.TP
+.B EIO
+An I/O error was encountered while performing the query.
+.TP
+.B ENOMEM
+There was insufficient memory to perform the query.
+.SH CONFORMING TO
+This API is specific to XFS filesystem on the Linux kernel.
+.SH SEE ALSO
+.BR ioctl (2)