aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorNeilBrown <neilb@suse.de>2006-06-26 00:27:58 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:39 -0700
commit45dc2de1e53a29f898b81326b8a16e6192d52e4e (patch)
treea1076950eef59cbe525435522d83757390f23c42
parent9e653b6342c94016f5cc9937061ef99e9c4b4045 (diff)
downloadmrst-s0i3-test-45dc2de1e53a29f898b81326b8a16e6192d52e4e.tar.gz
mrst-s0i3-test-45dc2de1e53a29f898b81326b8a16e6192d52e4e.tar.xz
mrst-s0i3-test-45dc2de1e53a29f898b81326b8a16e6192d52e4e.zip
[PATCH] md: Allow rdev state to be set via sysfs
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@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--Documentation/md.txt3
-rw-r--r--drivers/md/md.c26
2 files changed, 28 insertions, 1 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt
index df0b4551577..4cf5972821a 100644
--- a/Documentation/md.txt
+++ b/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 --git a/drivers/md/md.c b/drivers/md/md.c
index f6562ee4c6f..4b74c77213c 100644
--- a/drivers/md/md.c
+++ b/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)