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authorAlex Elder <elder@inktank.com>2012-10-25 23:34:42 -0500
committerAlex Elder <elder@inktank.com>2012-11-01 07:55:42 -0500
commit86b00e0da6be7bbc16412f126c5b548ac5d91d50 (patch)
tree466c0dcecd75ca707f33b18265be969e385f366c /Documentation
parenta92ffdf8a9b09f8fae9a8f418f87f30a5e459570 (diff)
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rbd: get parent spec for version 2 images
Add support for getting the the information identifying the parent image for rbd images that have them. The child image holds a reference to its parent image specification structure. Create a new entry "parent" in /sys/bus/rbd/image/N/ to report the identifying information for the parent image, if any. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-rbd4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-rbd b/Documentation/ABI/testing/sysfs-bus-rbd
index 1cf2adf46b11..cd9213ccf3dc 100644
--- a/Documentation/ABI/testing/sysfs-bus-rbd
+++ b/Documentation/ABI/testing/sysfs-bus-rbd
@@ -70,6 +70,10 @@ snap_*
A directory per each snapshot
+parent
+
+ Information identifying the pool, image, and snapshot id for
+ the parent image in a layered rbd image (format 2 only).
Entries under /sys/bus/rbd/devices/<dev-id>/snap_<snap-name>
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