On Tue, Jun 18, 2019 at 03:00:43PM -0500, Eric Sandeen wrote:
>
>
> On 6/18/19 2:56 PM, Darrick J. Wong wrote:
> > On Mon, Jun 17, 2019 at 12:27:26PM -0500, Eric Sandeen wrote:
> >> On 6/7/19 2:29 PM, Darrick J. Wong wrote:
> >>> From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> >>>
> >>> Create a separate manual page for the fs shutdown ioctl so we can
> >>> document how it works.
> >>>
> >>> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> >>> ---
> >>> man/man2/ioctl_xfs_goingdown.2 | 61 ++++++++++++++++++++++++++++++++++++++++
> >>> man/man3/xfsctl.3 | 7 +++++
> >>> 2 files changed, 68 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 00000000..e9a56f28
> >>> --- /dev/null
> >>> +++ b/man/man2/ioctl_xfs_goingdown.2
> >>> @@ -0,0 +1,61 @@
> >>> +.\" 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 2019-04-16 "XFS"
> >>> +.SH NAME
> >>> +ioctl_xfs_goingdown \- shut down an XFS filesystem
> >>> +.SH SYNOPSIS
> >>> +.br
> >>> +.B #include <xfs/xfs_fs.h>
> >>> +.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 will be totally unusable and must be
> >>> +unmounted.
> >>> +
> >>> +.PP
> >>> +.I flags
> >>> +can be one of the following:
> >>> +.RS 0.4i
> >>> +.TP
> >>> +.B XFS_FSOP_GOING_FLAGS_DEFAULT
> >>> +Flush all dirty data and in-core state to disk, flush the log, then shut down.
> >>> +.TP
> >>> +.B XFS_FSOP_GOING_FLAGS_LOGFLUSH
> >>> +Flush all pending transactions to the log, then shut down, leaving all dirty
> >>> +data unwritten.
> >>> +.TP
> >>> +.B XFS_FSOP_GOING_FLAGS_NOLOGFLUSH
> >>> +Shut down, leaving all dirty transactions and dirty data.
> >>
> >> leaving it ... what?
> >>
> >> Maybe "Shut down, without flushing any dirty transactions or data to disk."
> >
> > "Shut down immediately, without writing pending transactions or dirty data
> > to disk." ?
>
> The two other cases use "flush" terminology so I was sticking with that. If
> "write" is less jargon-y then I'd do it for all of them - using similar terminology
> for all 3 cases helps the reader understand the differences more clearly, I think.
I ended up editing it some more:
flags can be one of the following:
XFS_FSOP_GOING_FLAGS_DEFAULT
Flush all dirty data and in-core state to disk,
flush pending transactions to the log, and shut
down.
XFS_FSOP_GOING_FLAGS_LOGFLUSH
Flush all pending transactions to the log and shut
down, leaving all dirty data unwritten.
XFS_FSOP_GOING_FLAGS_NOLOGFLUSH
Shut down immediately, without writing pending
transactions or dirty data to disk.
--D
> -Eric
