diff options
Diffstat (limited to 'drivers/md/bitmap.c')
| -rw-r--r-- | drivers/md/bitmap.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 8f681da0027..15dbe03117e 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -423,6 +423,8 @@ void bitmap_update_sb(struct bitmap *bitmap) /* This might have been changed by a reshape */ sb->sync_size = cpu_to_le64(bitmap->mddev->resync_max_sectors); sb->chunksize = cpu_to_le32(bitmap->mddev->bitmap_info.chunksize); + sb->sectors_reserved = cpu_to_le32(bitmap->mddev-> + bitmap_info.space); kunmap_atomic(sb); write_page(bitmap, bitmap->storage.sb_page, 1); } @@ -536,6 +538,7 @@ static int bitmap_read_sb(struct bitmap *bitmap) bitmap_super_t *sb; unsigned long chunksize, daemon_sleep, write_behind; unsigned long long events; + unsigned long sectors_reserved = 0; int err = -EINVAL; struct page *sb_page; @@ -573,6 +576,7 @@ static int bitmap_read_sb(struct bitmap *bitmap) chunksize = le32_to_cpu(sb->chunksize); daemon_sleep = le32_to_cpu(sb->daemon_sleep) * HZ; write_behind = le32_to_cpu(sb->write_behind); + sectors_reserved = le32_to_cpu(sb->sectors_reserved); /* verify that the bitmap-specific fields are valid */ if (sb->magic != cpu_to_le32(BITMAP_MAGIC)) @@ -633,6 +637,9 @@ out_no_sb: bitmap->mddev->bitmap_info.chunksize = chunksize; bitmap->mddev->bitmap_info.daemon_sleep = daemon_sleep; bitmap->mddev->bitmap_info.max_write_behind = write_behind; + if (bitmap->mddev->bitmap_info.space == 0 || + bitmap->mddev->bitmap_info.space > sectors_reserved) + bitmap->mddev->bitmap_info.space = sectors_reserved; if (err) bitmap_print_sb(bitmap); return err; |