btrfs-progs: Convert man page for fsck.btrfs.

Convert man page for fsck.btrfs.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

Documentation/Makefile

@@ -11,7 +11,7 @@ MAN8_TXT += btrfs-map-logical.txt
 MAN8_TXT += btrfs-show-super.txt
 MAN8_TXT += btrfstune.txt
 MAN8_TXT += btrfs-zero-log.txt
-#MAN8_TXT += fsck.btrfs.txt
+MAN8_TXT += fsck.btrfs.txt
 #MAN8_TXT += mkfs.btrfs.txt
 
 # Sub commands for btrfs

Documentation/fsck.btrfs.txt

@@ -0,0 +1,51 @@
+fsck.btrfs(8)
+=============
+
+NAME
+----
+fsck.btrfs - do nothing, successfully
+
+SYNOPSIS
+--------
+'fsck.btrfs' [-aApy] [device...]
+
+DESCRIPTION
+-----------
+'fsck.btrfs' is a type of utility that should exist for any filesystem and is
+called during system setup when the corresponding `/etc/fstab` entries
+contain non-zero value for `fs_passno` , see `fstab`(5) for more.
+
+Traditional filesystems need to run their respective fsck utility in case the
+filesystem was not unmounted cleanly and the log needs to be replayed before
+mount. This is not needed for BTRFS. You should set fs_passno to 0.
+
+If you wish to check the consistency of a BTRFS filesystem or repair a damaged
+filesystem, see `btrfs-check`(8). By default the filesystem
+consistency is checked, the repair mode is enabled via '--repair' option (use
+with care!).
+
+OPTIONS
+-------
+The options are all the same and detect if 'fsck.btrfs' is executed in
+non-interactive mode and exits with success,
+otherwise prints a message about btrfs check.
+
+EXIT STATUS
+-----------
+There are two possible exit code returned:
+
+0::
+No error
+
+8::
+Operational error, eg. device does not exist
+
+FILES
+-----
+`/etc/fstab`
+
+SEE ALSO
+--------
+`btrfs`(8),
+`fsck`(8),
+`fstab`(5),