kernel/drivers/md/bcache/bcache_ondisk.h, branch linux-6.5.y

Merge tag 'flex-array-transformations-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux

2023-02-25T20:53:42Z

Pull flexible-array updates from Gustavo Silva: "Transform zero-length arrays, in unions, into flexible arrays" * tag 'flex-array-transformations-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: bcache: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper mm/memremap: Replace zero-length array with DECLARE_FLEX_ARRAY() helper exportfs: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

bcache: Silence memcpy() run-time false positive warnings

2023-01-25T20:24:50Z

struct bkey has internal padding in a union, but it isn't always named the same (e.g. key ## _pad, key_p, etc). This makes it extremely hard for the compiler to reason about the available size of copies done against such keys. Use unsafe_memcpy() for now, to silence the many run-time false positive warnings: memcpy: detected field-spanning write (size 264) of single field "&i->j" at drivers/md/bcache/journal.c:152 (size 240) memcpy: detected field-spanning write (size 24) of single field "&b->key" at drivers/md/bcache/btree.c:939 (size 16) memcpy: detected field-spanning write (size 24) of single field "&temp.key" at drivers/md/bcache/extents.c:428 (size 16) Reported-by: Alexandre Pereira Link: https://bugzilla.kernel.org/show_bug.cgi?id=216785 Acked-by: Coly Li Cc: Kent Overstreet Cc: linux-bcache@vger.kernel.org Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20230106060229.never.047-kees@kernel.org

bcache: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper

2023-01-05T23:48:45Z

Zero-length arrays are deprecated and we are moving towards adopting C99 flexible-array members, instead. So, replace zero-length arrays declarations in anonymous union with the new DECLARE_FLEX_ARRAY() helper macro. This helper allows for flexible-array members in unions. Link: https://github.com/KSPP/linux/issues/193 Link: https://github.com/KSPP/linux/issues/213 Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html Reviewed-by: Kees Cook Signed-off-by: Gustavo A. R. Silva

bcache: move uapi header bcache.h to bcache code directory

2021-10-29T12:43:21Z

The header file include/uapi/linux/bcache.h is not really a user space API heaer. This file defines the ondisk format of bcache internal meta data but no one includes it from user space, bcache-tools has its own copy of this header with minor modification. Therefore, this patch moves include/uapi/linux/bcache.h to bcache code directory as drivers/md/bcache/bcache_ondisk.h. Suggested-by: Arnd Bergmann Suggested-by: Christoph Hellwig Signed-off-by: Coly Li Link: https://lore.kernel.org/r/20211029060930.119923-2-colyli@suse.de Signed-off-by: Jens Axboe