[PATCH v2] man: list xfs_io lsattr inode flag letters

["Darrick J. Wong" <darrick.wong@oracle.com>]

From: Darrick J. Wong <darrick.wong@oracle.com>

The section of the xfs_io manpage for the 'chattr' command says to refer
to xfsctl(3) for information on the flags.  The inode flag information
was moved to ioctl_xfs_fssetxattr(2) ages ago, and it never actually
mapped the inode flag letters to inode flag bits, so fix the link and
add such a mapping to the xfs_io manpage.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
v2: don't duplicate the full descriptions, just map the letter to XFLAG
---
 man/man8/xfs_io.8 |   89 +++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 83 insertions(+), 6 deletions(-)

diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
index 2f17c64c..e794c311 100644
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -794,18 +794,95 @@ for all directory entries below the currently open file
 can be used to restrict the output to directories only).
 This is a depth first descent, it does not follow symlinks and
 it also does not cross mount points.
+
+The current inode flag letters are documented below.
+Please refer to the
+.BR ioctl_xfs_fsgetxattr "(2)"
+documentation for more details about what they mean.
+
+.PD 0
+.RS
+.TP 0.5i
+.B r
+realtime file (XFS_XFLAG_REALTIME)
+
+.TP
+.B p
+prealloc (XFS_XFLAG_PREALLOC)
+
+.TP
+.B i
+immutable (XFS_XFLAG_IMMUTABLE)
+
+.TP
+.B a
+append only (XFS_XFLAG_APPEND)
+
+.TP
+.B s
+synchronous file writes (XFS_XFLAG_SYNC)
+
+.TP
+.B A
+noatime (XFS_XFLAG_NOATIME)
+
+.TP
+.B d
+nodump (XFS_XFLAG_NODUMP)
+
+.TP
+.B t
+inherit realtime flag (XFS_XFLAG_RTINHERIT)"
+
+.TP
+.B P
+inherit project id (XFS_XFLAG_PROJINHERIT)
+
+.TP
+.B n
+no symlink creation (XFS_XFLAG_NOSYMLINKS)
+
+.TP
+.B e
+extent size hint (XFS_XFLAG_EXTSIZE)
+
+.TP
+.B E
+inherit extent size hint (XFS_XFLAG_EXTSZINHERIT)
+
+.TP
+.B f
+nodefrag (XFS_XFLAG_NODEFRAG)
+
+.TP
+.B S
+filestream allocator (XFS_XFLAG_FILESTREAM)
+
+.TP
+.B x
+direct access persistent memory (XFS_XFLAG_DAX)
+
+.TP
+.B C
+copy on write extent hint (XFS_XFLAG_COWEXTSIZE)
+
+.TP
+.B X
+has extended attributes (XFS_XFLAG_HASATTR)
+.RE
+
 .TP
 .BR chattr " [ " \-R " | " \-D " ] [ " + / \-riasAdtPneEfSxC " ]"
 Change extended inode flags on the currently open file. The
 .B \-R
 and
 .B \-D
-options have the same meaning as above. The mapping between each
-letter and the inode flags (refer to
-.BR xfsctl (3)
-for the full list) is available via the
-.B help
-command.
+options have the same meaning as above.
+
+See the
+.B lsattr
+command above for the list of inode flag letters.
+
 .TP
 .BI "flink " path
 Link the currently open file descriptor into the filesystem namespace.