Update for lzo support

[Btrfs-Progs][V2] Update for lzo support

- Add incompat flag, otherwise btrfs-progs will report error
  when operating on btrfs filesystems mounted with lzo option.

- Update man page.

- Allow to turn on lzo compression for defrag operation:

  # btrfs filesystem defragment -c[zlib, lzo] <file>

  Note: "-c zlib" will fail, because that's how getopt() works
  for optional arguments.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/man/btrfs.8.in b/man/btrfs.8.in
index cba2de1f..1ffed135 100644
--- a/man/btrfs.8.in
+++ b/man/btrfs.8.in
@@ -15,12 +15,12 @@ btrfs \- control a btrfs filesystem
 .PP
 \fBbtrfs\fP \fBsubvolume set-default\fP\fI <id> <path>\fP
 .PP
-\fBbtrfs\fP \fBfilesystem defragment\fP\fI [-vcf] [-s start] [-l len] [-t size] <file>|<dir> [<file>|<dir>...]\fP
-.PP
 \fBbtrfs\fP \fBfilesystem sync\fP\fI <path> \fP
 .PP
 \fBbtrfs\fP \fBfilesystem resize\fP\fI [+/\-]<size>[gkm]|max <filesystem>\fP
 .PP
+\fBbtrfs\fP \fBfilesystem defrag\fP\fI [options] <file>|<dir> [<file>|<dir>...]\fP
+.PP
 \fBbtrfs\fP \fBdevice scan\fP\fI [<device> [<device>..]]\fP
 .PP
 \fBbtrfs\fP \fBdevice show\fP\fI <dev>|<label> [<dev>|<label>...]\fP
@@ -30,7 +30,6 @@ btrfs \- control a btrfs filesystem
 \fBbtrfs\fP \fBdevice add\fP\fI <dev> [<dev>..] <path> \fP
 .PP
 \fBbtrfs\fP \fBdevice delete\fP\fI <dev> [<dev>..] <path> \fP]
-
 .PP
 \fBbtrfs\fP \fBhelp|\-\-help|\-h \fP\fI\fP
 .PP
@@ -104,10 +103,13 @@ Set the subvolume of the filesystem \fI<path>\fR which is mounted as
 is returned by the \fBsubvolume list\fR command.
 .TP
 
-\fBfilesystem defragment\fP\fI [-vcf] [-s start] [-l len] [-t size] <file>|<dir> [<file>|<dir>...]\fR
+\fBfilesystem defragment\fP -c[zlib|lzo] [-l \fIlen\fR] [-s \fIstart\fR] [-t \fIsize\fR] -[vf] <\fIfile\fR>|<\fIdir\fR> [<\fIfile\fR>|<\fIdir\fR>...]
+
 Defragment file data and/or directory metadata. To defragment all files in a
 directory you have to specify each one on its own or use your shell wildcards.
 
+The start position and the number of bytes to deframention can be specified by \fIstart\fR and \fIlen\fR. Any extent bigger than \fIthresh\fR will be considered already defragged. Use 0 to take the kernel default, and use 1 to say eveery single extent must be rewritten. You can also turn on compression in defragment operations.
+
 \fB-v\fP be verbose
 
 \fB-c\fP compress file contents while defragmenting