The patch titled
md: Allow rdev state to be set via sysfs
has been removed from the -mm tree. Its filename is
md-allow-rdev-state-to-be-set-via-sysfs.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: md: Allow rdev state to be set via sysfs
From: NeilBrown <neilb@xxxxxxx>
The md/dev-XXX/state file can now be written:
"faulty" simulates an error on the device
"remove" removes the device from the array (if it is not busy)
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
Documentation/md.txt | 3 +++
drivers/md/md.c | 26 +++++++++++++++++++++++++-
2 files changed, 28 insertions(+), 1 deletion(-)
diff -puN Documentation/md.txt~md-allow-rdev-state-to-be-set-via-sysfs Documentation/md.txt
--- a/Documentation/md.txt~md-allow-rdev-state-to-be-set-via-sysfs
+++ a/Documentation/md.txt
@@ -302,6 +302,9 @@ Each directory contains:
This includes spares that are in the process
of being recoverred to
This list make grow in future.
+ This can be written to.
+ Writing "faulty" simulates a failure on the device.
+ Writing "remove" removes the device from the array.
errors
An approximate count of read errors that have been detected on
diff -puN drivers/md/md.c~md-allow-rdev-state-to-be-set-via-sysfs drivers/md/md.c
--- a/drivers/md/md.c~md-allow-rdev-state-to-be-set-via-sysfs
+++ a/drivers/md/md.c
@@ -1745,8 +1745,32 @@ state_show(mdk_rdev_t *rdev, char *page)
return len+sprintf(page+len, "\n");
}
+static ssize_t
+state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
+{
+ /* can write
+ * faulty - simulates and error
+ * remove - disconnects the device
+ */
+ int err = -EINVAL;
+ if (cmd_match(buf, "faulty") && rdev->mddev->pers) {
+ md_error(rdev->mddev, rdev);
+ err = 0;
+ } else if (cmd_match(buf, "remove")) {
+ if (rdev->raid_disk >= 0)
+ err = -EBUSY;
+ else {
+ mddev_t *mddev = rdev->mddev;
+ kick_rdev_from_array(rdev);
+ md_update_sb(mddev);
+ md_new_event(mddev);
+ err = 0;
+ }
+ }
+ return err ? err : len;
+}
static struct rdev_sysfs_entry
-rdev_state = __ATTR_RO(state);
+rdev_state = __ATTR(state, 0644, state_show, state_store);
static ssize_t
super_show(mdk_rdev_t *rdev, char *page)
_
Patches currently in -mm which might be from neilb@xxxxxxx are
origin.patch
generic_file_buffered_write-deadlock-on-vectored-write.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
lockdep-annotate-sunrpc-code.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
