From 7fbcc39c3075b88718bcb3e8e6f3ff599a4e9f86 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.cz>
Date: Wed, 18 Sep 2013 18:19:30 +0200
Subject: btrfs-progs: look up the containing tree root id

Find the tree id of the containing subvolume for a given file or
directory. For subvolume return it's own id.

$ btrfs inspect-internal rootid <path>

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
---
 man/btrfs.8.in | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'man')

diff --git a/man/btrfs.8.in b/man/btrfs.8.in
index a2d4a8f3..b94df2e2 100644
--- a/man/btrfs.8.in
+++ b/man/btrfs.8.in
@@ -80,6 +80,8 @@ btrfs \- control a btrfs filesystem
 .PP
 \fBbtrfs\fP \fBinspect-internal subvolid-resolve\fP \fI<subvolid>\fP \fI<path>\fP
 .PP
+\fBbtrfs\fP \fBinspect-internal rootid\fP \fI<path>\fP
+.PP
 .PP
 \fBbtrfs\fP \fBsend\fP [-v] [-p \fI<parent>\fP] [-c \fI<clone-src>\fP] [-f \fI<outfile>\fP] \fI<subvol>\fP
 .PP
@@ -577,6 +579,13 @@ not enough to read all the resolved results. The max value one can set is 64k.
 Get file system paths for the given subvolume ID.
 .TP
 
+\fBinspect-internal rootid\fP \fI<path>\fP
+For a given file or directory, return the containing tree root id. For a
+subvolume return it's own tree id.
+
+The result is undefined for the so-called empty subvolumes (identified by inode number 2).
+.TP
+
 \fBsend\fP [-v] [-p \fI<parent>\fP] [-c \fI<clone-src>\fP] [-f \fI<outfile>\fP] \fI<subvol>\fP
 Send the subvolume to stdout.
 Sends the subvolume specified by \fI<subvol>\fR to stdout.
-- 
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