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md/raid10: recognise replacements when assembling array. 

If a Replacement is seen, file it as such.

If we see two replacements (or two normal devices) for the one slot,
abort.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2011-12-23 10:17:55 +11:00
parent 4ca40c2ce0
commit 56a2559bb6
1 changed files with 17 additions and 0 deletions
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17
drivers/md/raid10.c
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@ -3201,6 +3201,16 @@ static int run(struct mddev *mddev)
continue;
disk = conf->mirrors + disk_idx;
if (test_bit(Replacement, &rdev->flags)) {
if (disk->replacement)
goto out_free_conf;
disk->replacement = rdev;
} else {
if (disk->rdev)
goto out_free_conf;
disk->rdev = rdev;
}
disk->rdev = rdev;
disk_stack_limits(mddev->gendisk, rdev->bdev,
rdev->data_offset << 9);
@ -3228,6 +3238,13 @@ static int run(struct mddev *mddev)
disk = conf->mirrors + i;
if (!disk->rdev && disk->replacement) {
/* The replacement is all we have - use it */
disk->rdev = disk->replacement;
disk->replacement = NULL;
clear_bit(Replacement, &disk->rdev->flags);
}
if (!disk->rdev ||
!test_bit(In_sync, &disk->rdev->flags)) {
disk->head_position = 0;