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| author | Guoqing Jiang | 2017-03-01 09:42:39 +0100 |
|---|---|---|
| committer | Shaohua Li | 2017-03-17 00:55:50 +0100 |
| commit | b98938d16a108d0201d54b8db1337dac71aebfdd (patch) | |
| tree | 2005c989bfe629751fa7349d808cd541695a1930 /drivers/md/bitmap.h | |
| parent | md-cluster: add CHANGE_CAPACITY message type (diff) | |
| download | kernel-qcow2-linux-b98938d16a108d0201d54b8db1337dac71aebfdd.tar.gz kernel-qcow2-linux-b98938d16a108d0201d54b8db1337dac71aebfdd.tar.xz kernel-qcow2-linux-b98938d16a108d0201d54b8db1337dac71aebfdd.zip | |
md-cluster: introduce cluster_check_sync_size
Support resize is a little complex for clustered
raid, since we need to ensure all the nodes share
the same knowledge about the size of raid.
We achieve the goal by check the sync_size which
is in each node's bitmap, we can only change the
capacity after cluster_check_sync_size returns 0.
Also, get_bitmap_from_slot is added to get a slot's
bitmap. And we exported some funcs since they are
used in cluster_check_sync_size().
We can also reuse get_bitmap_from_slot to remove
redundant code existed in bitmap_copy_from_slot.
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/bitmap.h')
| -rw-r--r-- | drivers/md/bitmap.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/bitmap.h b/drivers/md/bitmap.h index 5b6dd63dda91..9f761097aab2 100644 --- a/drivers/md/bitmap.h +++ b/drivers/md/bitmap.h @@ -267,8 +267,10 @@ void bitmap_daemon_work(struct mddev *mddev); int bitmap_resize(struct bitmap *bitmap, sector_t blocks, int chunksize, int init); +struct bitmap *get_bitmap_from_slot(struct mddev *mddev, int slot); int bitmap_copy_from_slot(struct mddev *mddev, int slot, sector_t *lo, sector_t *hi, bool clear_bits); +void bitmap_free(struct bitmap *bitmap); #endif #endif |