diff options
Diffstat (limited to 'drivers/md/bitmap.c')
| -rw-r--r-- | drivers/md/bitmap.c | 41 |
1 files changed, 31 insertions, 10 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 9fb2ccac958a..b6fa55a3cff8 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -471,6 +471,7 @@ void bitmap_update_sb(struct bitmap *bitmap) kunmap_atomic(sb); write_page(bitmap, bitmap->storage.sb_page, 1); } +EXPORT_SYMBOL(bitmap_update_sb); /* print out the bitmap file superblock */ void bitmap_print_sb(struct bitmap *bitmap) @@ -1727,7 +1728,7 @@ void bitmap_flush(struct mddev *mddev) /* * free memory that was allocated */ -static void bitmap_free(struct bitmap *bitmap) +void bitmap_free(struct bitmap *bitmap) { unsigned long k, pages; struct bitmap_page *bp; @@ -1761,6 +1762,7 @@ static void bitmap_free(struct bitmap *bitmap) kfree(bp); kfree(bitmap); } +EXPORT_SYMBOL(bitmap_free); void bitmap_destroy(struct mddev *mddev) { @@ -1920,6 +1922,27 @@ out: } EXPORT_SYMBOL_GPL(bitmap_load); +struct bitmap *get_bitmap_from_slot(struct mddev *mddev, int slot) +{ + int rv = 0; + struct bitmap *bitmap; + + bitmap = bitmap_create(mddev, slot); + if (IS_ERR(bitmap)) { + rv = PTR_ERR(bitmap); + return ERR_PTR(rv); + } + + rv = bitmap_init_from_disk(bitmap, 0); + if (rv) { + bitmap_free(bitmap); + return ERR_PTR(rv); + } + + return bitmap; +} +EXPORT_SYMBOL(get_bitmap_from_slot); + /* Loads the bitmap associated with slot and copies the resync information * to our bitmap */ @@ -1929,14 +1952,13 @@ int bitmap_copy_from_slot(struct mddev *mddev, int slot, int rv = 0, i, j; sector_t block, lo = 0, hi = 0; struct bitmap_counts *counts; - struct bitmap *bitmap = bitmap_create(mddev, slot); - - if (IS_ERR(bitmap)) - return PTR_ERR(bitmap); + struct bitmap *bitmap; - rv = bitmap_init_from_disk(bitmap, 0); - if (rv) - goto err; + bitmap = get_bitmap_from_slot(mddev, slot); + if (IS_ERR(bitmap)) { + pr_err("%s can't get bitmap from slot %d\n", __func__, slot); + return -1; + } counts = &bitmap->counts; for (j = 0; j < counts->chunks; j++) { @@ -1963,8 +1985,7 @@ int bitmap_copy_from_slot(struct mddev *mddev, int slot, bitmap_unplug(mddev->bitmap); *low = lo; *high = hi; -err: - bitmap_free(bitmap); + return rv; } EXPORT_SYMBOL_GPL(bitmap_copy_from_slot); |