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authorNeilBrown <neilb@suse.de>2006-06-26 09:28:01 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 18:58:40 +0200
commitf655675b3fe09c4d0506d357527fe07544623009 (patch)
tree969a798b6ba25b88f08b0f9cfe1aed323be81d3e /drivers
parent[PATCH] md: Allow resync_start to be set and queried via sysfs (diff)
downloadlinux-f655675b3fe09c4d0506d357527fe07544623009.tar.xz
linux-f655675b3fe09c4d0506d357527fe07544623009.zip
[PATCH] md: Allow the write_mostly flag to be set via sysfs
It appears in /sys/mdX/md/dev-YYY/state and can be set or cleared by writing 'writemostly' or '-writemostly' respectively. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/md.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 8603c0692eab..331b1bc95735 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1737,6 +1737,10 @@ state_show(mdk_rdev_t *rdev, char *page)
len += sprintf(page+len, "%sin_sync",sep);
sep = ",";
}
+ if (test_bit(WriteMostly, &rdev->flags)) {
+ len += sprintf(page+len, "%swrite_mostly",sep);
+ sep = ",";
+ }
if (!test_bit(Faulty, &rdev->flags) &&
!test_bit(In_sync, &rdev->flags)) {
len += sprintf(page+len, "%sspare", sep);
@@ -1751,6 +1755,8 @@ state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
/* can write
* faulty - simulates and error
* remove - disconnects the device
+ * writemostly - sets write_mostly
+ * -writemostly - clears write_mostly
*/
int err = -EINVAL;
if (cmd_match(buf, "faulty") && rdev->mddev->pers) {
@@ -1766,6 +1772,12 @@ state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
md_new_event(mddev);
err = 0;
}
+ } else if (cmd_match(buf, "writemostly")) {
+ set_bit(WriteMostly, &rdev->flags);
+ err = 0;
+ } else if (cmd_match(buf, "-writemostly")) {
+ clear_bit(WriteMostly, &rdev->flags);
+ err = 0;
}
return err ? err : len;
}