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| author | Heming Zhao <heming.zhao@suse.com> | 2024-02-23 13:11:28 +0100 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2024-02-26 22:34:44 +0100 |
| commit | ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06 (patch) | |
| tree | 1124a85fdfca366afbd18d177b5718c4ef56bd08 | |
| parent | md: check mddev->pers before calling md_set_readonly() (diff) | |
| download | linux-ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06.tar.xz linux-ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06.zip | |
md/md-bitmap: fix incorrect usage for sb_index
Commit d7038f951828 ("md-bitmap: don't use ->index for pages backing the
bitmap file") removed page->index from bitmap code, but left wrong code
logic for clustered-md. current code never set slot offset for cluster
nodes, will sometimes cause crash in clustered env.
Call trace (partly):
md_bitmap_file_set_bit+0x110/0x1d8 [md_mod]
md_bitmap_startwrite+0x13c/0x240 [md_mod]
raid1_make_request+0x6b0/0x1c08 [raid1]
md_handle_request+0x1dc/0x368 [md_mod]
md_submit_bio+0x80/0xf8 [md_mod]
__submit_bio+0x178/0x300
submit_bio_noacct_nocheck+0x11c/0x338
submit_bio_noacct+0x134/0x614
submit_bio+0x28/0xdc
submit_bh_wbc+0x130/0x1cc
submit_bh+0x1c/0x28
Fixes: d7038f951828 ("md-bitmap: don't use ->index for pages backing the bitmap file")
Cc: stable@vger.kernel.org # v6.6+
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240223121128.28985-1-heming.zhao@suse.com
| -rw-r--r-- | drivers/md/md-bitmap.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c index 9672f75c3050..a4976ceae868 100644 --- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -234,7 +234,8 @@ static int __write_sb_page(struct md_rdev *rdev, struct bitmap *bitmap, sector_t doff; bdev = (rdev->meta_bdev) ? rdev->meta_bdev : rdev->bdev; - if (pg_index == store->file_pages - 1) { + /* we compare length (page numbers), not page offset. */ + if ((pg_index - store->sb_index) == store->file_pages - 1) { unsigned int last_page_size = store->bytes & (PAGE_SIZE - 1); if (last_page_size == 0) @@ -438,8 +439,8 @@ static void filemap_write_page(struct bitmap *bitmap, unsigned long pg_index, struct page *page = store->filemap[pg_index]; if (mddev_is_clustered(bitmap->mddev)) { - pg_index += bitmap->cluster_slot * - DIV_ROUND_UP(store->bytes, PAGE_SIZE); + /* go to node bitmap area starting point */ + pg_index += store->sb_index; } if (store->file) @@ -952,6 +953,7 @@ static void md_bitmap_file_set_bit(struct bitmap *bitmap, sector_t block) unsigned long index = file_page_index(store, chunk); unsigned long node_offset = 0; + index += store->sb_index; if (mddev_is_clustered(bitmap->mddev)) node_offset = bitmap->cluster_slot * store->file_pages; @@ -982,6 +984,7 @@ static void md_bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block) unsigned long index = file_page_index(store, chunk); unsigned long node_offset = 0; + index += store->sb_index; if (mddev_is_clustered(bitmap->mddev)) node_offset = bitmap->cluster_slot * store->file_pages; |