From 42b5d73b5d231bbe38639c6dec913505d7f55372 Mon Sep 17 00:00:00 2001 From: Naohiro Aota Date: Wed, 21 Jul 2021 21:43:34 +0900 Subject: [PATCH] btrfs: drop unnecessary ASSERT from btrfs_submit_direct() When on SINGLE block group, btrfs_get_io_geometry() will return "the size of the block group - the offset of the logical address within the block group" as geom.len. Since we allow up to 8 GiB zone size on zoned filesystem, we can have up to 8 GiB block group, so can have up to 8 GiB geom.len as well. With this setup, we easily hit the "ASSERT(geom.len <= INT_MAX);". The ASSERT looks like to guard btrfs_bio_clone_partial() and bio_trim() which both take "int" (now u64 due to the previous patch). So to be precise the ASSERT should check if clone_len <= UINT_MAX. But actually, clone_len is already capped by bio.bi_iter.bi_size which is unsigned int. So the ASSERT is not necessary. Drop the ASSERT and properly compare submit_len and geom.len in u64. Then, let the implicit casting to convert it to u64. Signed-off-by: Naohiro Aota Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/inode.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index c917e3117842..3ed88f2ac393 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -8239,8 +8239,8 @@ static blk_qc_t btrfs_submit_direct(struct inode *inode, struct iomap *iomap, u64 start_sector; int async_submit = 0; u64 submit_len; - int clone_offset = 0; - int clone_len; + u64 clone_offset = 0; + u64 clone_len; u64 logical; int ret; blk_status_t status; @@ -8288,9 +8288,9 @@ static blk_qc_t btrfs_submit_direct(struct inode *inode, struct iomap *iomap, status = errno_to_blk_status(ret); goto out_err_em; } - ASSERT(geom.len <= INT_MAX); - clone_len = min_t(int, submit_len, geom.len); + clone_len = min(submit_len, geom.len); + ASSERT(clone_len <= UINT_MAX); /* * This will never fail as it's passing GPF_NOFS and