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authorAlex Elder <elder@inktank.com>2012-07-10 20:30:11 -0500
committerAlex Elder <elder@inktank.com>2012-10-01 14:30:53 -0500
commit589d30e0b3e649e2660f9a67be88e235b28bc319 (patch)
tree7430a5eea84dc3378ba69a5cd563577afb98b228 /Documentation/ABI
parent3bb59ad515527fa75cf71d997d17cea18160da74 (diff)
rbd: define rbd_dev_image_id()
New format 2 rbd images are permanently identified by a unique image id. Each rbd image also has a name, but the name can be changed. A format 2 rbd image will have an object--whose name is based on the image name--which maps an image's name to its image id. Create a new function rbd_dev_image_id() that checks for the existence of the image id object, and if it's found, records the image id in the rbd_device structure. Create a new rbd device attribute (/sys/bus/rbd/<num>/image_id) that makes this information available. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-rbd5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-rbd b/Documentation/ABI/testing/sysfs-bus-rbd
index 3c17b62899f6..7cbbe343af5e 100644
--- a/Documentation/ABI/testing/sysfs-bus-rbd
+++ b/Documentation/ABI/testing/sysfs-bus-rbd
@@ -33,6 +33,11 @@ name
The name of the rbd image.
+image_id
+
+ The unique id for the rbd image. (For rbd image format 1
+ this is empty.)
+
pool
The name of the storage pool where this rbd image resides.