Re: [PATCH v2] bdev: add back PAGE_SIZE block size validation for sb_set_blocksize()

[Christian Brauner <brauner@kernel.org>]

On Thu, 06 Mar 2025 18:04:03 -0800, Luis Chamberlain wrote:
> The commit titled "block/bdev: lift block size restrictions to 64k"
> lifted the block layer's max supported block size to 64k inside the
> helper blk_validate_block_size() now that we support large folios.
> However in lifting the block size we also removed the silly use
> cases many filesystems have to use sb_set_blocksize() to *verify*
> that the block size <= PAGE_SIZE. The call to sb_set_blocksize() was
> used to check the block size <= PAGE_SIZE since historically we've
> always supported userspace to create for example 64k block size
> filesystems even on 4k page size systems, but what we didn't allow
> was mounting them. Older filesystems have been using the check with
> sb_set_blocksize() for years.
> 
> [...]

Applied to the vfs-6.15.pagesize branch of the vfs/vfs.git tree.
Patches in the vfs-6.15.pagesize branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs-6.15.pagesize

[1/1] bdev: add back PAGE_SIZE block size validation for sb_set_blocksize()
      https://git.kernel.org/vfs/vfs/c/a64e5a596067