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| author | Alex Elder <elder@inktank.com> | 2012-07-11 03:30:11 +0200 |
|---|---|---|
| committer | Alex Elder <elder@inktank.com> | 2012-10-01 21:30:53 +0200 |
| commit | 589d30e0b3e649e2660f9a67be88e235b28bc319 (patch) | |
| tree | 7430a5eea84dc3378ba69a5cd563577afb98b228 /Documentation | |
| parent | rbd: define some new format constants (diff) | |
| download | linux-589d30e0b3e649e2660f9a67be88e235b28bc319.tar.xz linux-589d30e0b3e649e2660f9a67be88e235b28bc319.zip | |
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')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-rbd | 5 |
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. |