From 8a91e336dfaae2eec1e60acb64e6851f9b86c81c Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Wed, 10 Jul 2019 17:16:36 -0400 Subject: [PATCH] man: create a separate xfs shutdown ioctl manpage Create a separate manual page for the xfs shutdown ioctl so we can document how it works. Signed-off-by: Darrick J. Wong [sandeen: minor edits] Reviewed-by: Eric Sandeen Signed-off-by: Eric Sandeen --- man/man2/ioctl_xfs_goingdown.2 | 60 ++++++++++++++++++++++++++++++++++ man/man3/xfsctl.3 | 7 ++++ 2 files changed, 67 insertions(+) create mode 100644 man/man2/ioctl_xfs_goingdown.2 diff --git a/man/man2/ioctl_xfs_goingdown.2 b/man/man2/ioctl_xfs_goingdown.2 new file mode 100644 index 000000000..42045b6bc --- /dev/null +++ b/man/man2/ioctl_xfs_goingdown.2 @@ -0,0 +1,60 @@ +.\" Copyright (c) 2019, Oracle. All rights reserved. +.\" +.\" %%%LICENSE_START(GPLv2+_DOC_FULL) +.\" SPDX-License-Identifier: GPL-2.0+ +.\" %%%LICENSE_END +.TH IOCTL-XFS-GOINGDOWN 2 2019-06-17 "XFS" +.SH NAME +ioctl_xfs_goingdown \- shut down an XFS filesystem +.SH SYNOPSIS +.br +.B #include +.PP +.BI "int ioctl(int " fd ", XFS_IOC_GOINGDOWN, uint32_t " flags ); +.SH DESCRIPTION +Shuts down a live XFS filesystem. +This is a software initiated hard shutdown and should be avoided whenever +possible. +After this call completes, the filesystem ill be totally unusable until the +filesystem has been unmounted and remounted. + +.PP +.I flags +can be one of the following: +.RS 0.4i +.TP +.B XFS_FSOP_GOING_FLAGS_DEFAULT +Flush all dirty data and metadata to disk, flush pending transactions +to the log, and shut down. +.TP +.B XFS_FSOP_GOING_FLAGS_LOGFLUSH +Flush all pending metadata transactions to the log and shut down, leaving +all dirty data unwritten. +.TP +.B XFS_FSOP_GOING_FLAGS_NOLOGFLUSH +Shut down immediately, without writing pending transactions or dirty data +to disk. + +.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 EFSBADCRC +Metadata checksum validation failed while performing the query. +.TP +.B EFSCORRUPTED +Metadata corruption was encountered while performing the query. +.TP +.B EIO +An I/O error was encountered while performing the query. +.TP +.B EPERM +Caller did not have permission to shut down the filesystem. +.SH CONFORMING TO +This API is specific to XFS filesystem on the Linux kernel. +.SH SEE ALSO +.BR ioctl (2) diff --git a/man/man3/xfsctl.3 b/man/man3/xfsctl.3 index 077dd411e..7e6588b8f 100644 --- a/man/man3/xfsctl.3 +++ b/man/man3/xfsctl.3 @@ -365,6 +365,12 @@ See for more information. Save yourself a lot of frustration and avoid these ioctls. +.TP +.B XFS_IOC_GOINGDOWN +See +.BR ioctl_xfs_goingdown (2) +for more information. + .PP .nf .B XFS_IOC_THAW @@ -388,6 +394,7 @@ as they are not of general use to applications. .BR ioctl_xfs_fscounts (2), .BR ioctl_xfs_getresblks (2), .BR ioctl_xfs_getbmap (2), +.BR ioctl_xfs_goingdown (2), .BR fstatfs (2), .BR statfs (2), .BR xfs (5), -- 2.47.2