aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorNeilBrown <neilb@suse.de>2006-06-26 00:28:00 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:40 -0700
commita94213b1fa7b26dcc271bf4b4f9eebf1f1af33a2 (patch)
tree4954e6e461e2edf25bb63e9b286bfaea7a07a84a
parentd4dbd0250ea1d24bb3d2d13559432fa069d795e2 (diff)
downloadmrst-s0i3-test-a94213b1fa7b26dcc271bf4b4f9eebf1f1af33a2.tar.gz
mrst-s0i3-test-a94213b1fa7b26dcc271bf4b4f9eebf1f1af33a2.tar.xz
mrst-s0i3-test-a94213b1fa7b26dcc271bf4b4f9eebf1f1af33a2.zip
[PATCH] md: Allow resync_start to be set and queried via sysfs
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.txt6
-rw-r--r--drivers/md/md.c26
2 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt
index 80f158745ca..f3d418ba625 100644
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -205,6 +205,12 @@ All md devices contain:
simply a number that is interpretted differently by different
levels. It can be written while assembling an array.
+ resync_start
+ The point at which resync should start. If no resync is needed,
+ this will be a very large number. At array creation it will
+ default to 0, though starting the array as 'clean' will
+ set it much larger.
+
new_dev
This file can be written but not read. The value written should
be a block device number as major:minor. e.g. 8:0
diff --git a/drivers/md/md.c b/drivers/md/md.c
index e3261c438a6..8603c0692ea 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2235,6 +2235,30 @@ chunk_size_store(mddev_t *mddev, const char *buf, size_t len)
static struct md_sysfs_entry md_chunk_size =
__ATTR(chunk_size, 0644, chunk_size_show, chunk_size_store);
+static ssize_t
+resync_start_show(mddev_t *mddev, char *page)
+{
+ return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp);
+}
+
+static ssize_t
+resync_start_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ /* can only set chunk_size if array is not yet active */
+ char *e;
+ unsigned long long n = simple_strtoull(buf, &e, 10);
+
+ if (mddev->pers)
+ return -EBUSY;
+ if (!*buf || (*e && *e != '\n'))
+ return -EINVAL;
+
+ mddev->recovery_cp = n;
+ return len;
+}
+static struct md_sysfs_entry md_resync_start =
+__ATTR(resync_start, 0644, resync_start_show, resync_start_store);
+
/*
* The array state can be:
*
@@ -2771,6 +2795,7 @@ static struct attribute *md_default_attrs[] = {
&md_raid_disks.attr,
&md_chunk_size.attr,
&md_size.attr,
+ &md_resync_start.attr,
&md_metadata.attr,
&md_new_device.attr,
&md_safe_delay.attr,
@@ -3263,6 +3288,7 @@ static int do_md_stop(mddev_t * mddev, int mode)
mddev->array_size = 0;
mddev->size = 0;
mddev->raid_disks = 0;
+ mddev->recovery_cp = 0;
disk = mddev->gendisk;
if (disk)