From: NeilBrown <neilb@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 002 of 12] md: Set desc_nr correctly for version-1 superblocks.
Date: Tue, 27 Jun 2006 17:05:15 +1000 [thread overview]
Message-ID: <1060627070515.25974@suse.de> (raw)
In-Reply-To: 20060627170010.25835.patches@notabene
This has to be done in ->load_super, not ->validate_super
Without this, hot-adding devices to an array doesn't always
work right - though there is a work around in mdadm-2.5.2 to
make this less of an issue.
### Diffstat output
./drivers/md/md.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c 2006-06-27 12:15:17.000000000 +1000
+++ ./drivers/md/md.c 2006-06-27 12:17:32.000000000 +1000
@@ -1064,6 +1064,11 @@ static int super_1_load(mdk_rdev_t *rdev
if (rdev->sb_size & bmask)
rdev-> sb_size = (rdev->sb_size | bmask)+1;
+ if (sb->level == cpu_to_le32(LEVEL_MULTIPATH))
+ rdev->desc_nr = -1;
+ else
+ rdev->desc_nr = le32_to_cpu(sb->dev_number);
+
if (refdev == 0)
ret = 1;
else {
@@ -1173,7 +1178,6 @@ static int super_1_validate(mddev_t *mdd
}
if (mddev->level != LEVEL_MULTIPATH) {
int role;
- rdev->desc_nr = le32_to_cpu(sb->dev_number);
role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]);
switch(role) {
case 0xffff: /* spare */
next prev parent reply other threads:[~2006-06-27 7:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-27 7:05 [PATCH 000 of 12] md: Introduction NeilBrown
2006-06-27 7:05 ` [PATCH 001 of 12] md: Possible fix for unplug problem NeilBrown
2006-06-27 7:05 ` NeilBrown [this message]
2006-06-27 7:05 ` [PATCH 003 of 12] md: Delay starting md threads until array is completely setup NeilBrown
2006-06-27 7:05 ` [PATCH 004 of 12] md: Fix resync speed calculation for restarted resyncs NeilBrown
2006-06-27 7:05 ` [PATCH 005 of 12] md: Fix a plug/unplug race in raid5 NeilBrown
2006-06-27 7:05 ` [PATCH 006 of 12] md: Fix some small races in bitmap plugging " NeilBrown
2006-06-27 7:05 ` [PATCH 007 of 12] md: Fix usage of wrong variable in raid1 NeilBrown
2006-06-27 7:05 ` [PATCH 008 of 12] md: Unify usage of symbolic names for perms NeilBrown
2006-06-27 7:05 ` [PATCH 009 of 12] md: Require CAP_SYS_ADMIN for (re-)configuring md devices via sysfs NeilBrown
2006-06-27 7:05 ` [PATCH 010 of 12] md: Remove a variable that is now unused NeilBrown
2006-06-27 7:06 ` [PATCH 011 of 12] md: Fix "Will Configure" message when interpreting md= kernel parameter NeilBrown
2006-06-27 7:06 ` [PATCH 012 of 12] md: Include sector number in messages about corrected read errors NeilBrown
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