6.1-stable review patch. If anyone has any objections, please let me know.
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From: Zheng Qixing zhengqixing@huawei.com
[ Upstream commit 6ec1f0239485028445d213d91cfee5242f3211ba ]
The bitmap_get_stats() function incorrectly returns -ENOENT for external bitmaps.
Remove the external bitmap check as the statistics should be available regardless of bitmap storage location.
Return -EINVAL only for invalid bitmap with no storage (neither in superblock nor in external file).
Note: "bitmap_info.external" here refers to a bitmap stored in a separate file (bitmap_file), not to external metadata.
Fixes: 8d28d0ddb986 ("md/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime") Signed-off-by: Zheng Qixing zhengqixing@huawei.com Link: https://lore.kernel.org/linux-raid/20250403015322.2873369-1-zhengqixing@huaw... Signed-off-by: Yu Kuai yukuai3@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/md-bitmap.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -2029,9 +2029,8 @@ int md_bitmap_get_stats(struct bitmap *b
if (!bitmap) return -ENOENT; - if (bitmap->mddev->bitmap_info.external) - return -ENOENT; - if (!bitmap->storage.sb_page) /* no superblock */ + if (!bitmap->mddev->bitmap_info.external && + !bitmap->storage.sb_page) return -EINVAL; sb = kmap_local_page(bitmap->storage.sb_page); stats->sync_size = le64_to_cpu(sb->sync_size);