summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorNeilBrown <neilb@cse.unsw.edu.au>2005-08-18 11:24:16 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-18 12:53:57 -0700
commit9223214e8d757663f366133ba5f9b58aa6b28efb (patch)
treeb3977e067dbf3b2679c16f77c9e9025c7f71f26f
parent60d7603a18a5c07252e7aa0b0e2424315195d4dc (diff)
[PATCH] md: make sure mddev->bitmap_offset gets cleared between array instantiations.
... otherwise we might try to load a bitmap from an array which hasn't one. The bug is that if you create an array with an internal bitmap, shut it down, and then create an array with the same md device, the md drive will assume it should have a bitmap too. As the array can be created with a different md device, it is mostly an inconvenience. I'm pretty sure there is no risk of data corruption. Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/md/md.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 480f658db6f..d4c275604a3 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -623,6 +623,7 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->raid_disks = sb->raid_disks;
mddev->size = sb->size;
mddev->events = md_event(sb);
+ mddev->bitmap_offset = 0;
if (sb->state & (1<<MD_SB_CLEAN))
mddev->recovery_cp = MaxSector;
@@ -938,6 +939,7 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->raid_disks = le32_to_cpu(sb->raid_disks);
mddev->size = le64_to_cpu(sb->size)/2;
mddev->events = le64_to_cpu(sb->events);
+ mddev->bitmap_offset = 0;
mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
memcpy(mddev->uuid, sb->set_uuid, 16);
@@ -1824,6 +1826,7 @@ static int do_md_stop(mddev_t * mddev, int ro)
fput(mddev->bitmap_file);
mddev->bitmap_file = NULL;
}
+ mddev->bitmap_offset = 0;
/*
* Free resources if final stop