Signed-off-by: Neil Brown <neilb@xxxxxxx>
### Diffstat output
./Documentation/md.txt | 6 ++++++
./drivers/md/md.c | 23 +++++++++++++++++++++++
2 files changed, 29 insertions(+)
diff ./Documentation/md.txt~current~ ./Documentation/md.txt
--- ./Documentation/md.txt~current~ 2005-12-12 11:36:55.000000000 +1100
+++ ./Documentation/md.txt 2005-12-12 11:37:32.000000000 +1100
@@ -244,6 +244,12 @@ Each directory contains:
it currently fills. This can only be set while assembling an
array. A device for which this is set is assumed to be working.
+ offset
+ This gives the location in the device (in sectors from the
+ start) where data from the array will be stored. Any part of
+ the device before this offset us not touched, unless it is
+ used for storing metadata (Formats 1.1 and 1.2).
+
An active md device will also contain and entry for each active device
in the array. These are named
diff ./drivers/md/md.c~current~ ./drivers/md/md.c
--- ./drivers/md/md.c~current~ 2005-12-12 11:37:12.000000000 +1100
+++ ./drivers/md/md.c 2005-12-12 11:37:48.000000000 +1100
@@ -1664,11 +1664,34 @@ slot_store(mdk_rdev_t *rdev, const char
static struct rdev_sysfs_entry rdev_slot =
__ATTR(slot, 0644, slot_show, slot_store);
+static ssize_t
+offset_show(mdk_rdev_t *rdev, char *page)
+{
+ return sprintf(page, "%llu\n", rdev->data_offset);
+}
+
+static ssize_t
+offset_store(mdk_rdev_t *rdev, const char *buf, size_t len)
+{
+ char *e;
+ unsigned long long offset = simple_strtoull(buf, &e, 10);
+ if (e==buf || (*e && *e != '\n'))
+ return -EINVAL;
+ if (rdev->mddev->pers)
+ return -EBUSY;
+ rdev->data_offset = offset;
+ return len;
+}
+
+static struct rdev_sysfs_entry rdev_offset =
+__ATTR(offset, 0644, offset_show, offset_store);
+
static struct attribute *rdev_default_attrs[] = {
&rdev_state.attr,
&rdev_super.attr,
&rdev_errors.attr,
&rdev_slot.attr,
+ &rdev_offset.attr,
NULL,
};
static ssize_t
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
