[GIT PULL] erofs fixes for 7.4-rc3

[Gao Xiang <xiang@kernel.org>]

Hi Linus,

Could you consider these fixes for 7.4-rc3?

There are some recent random fixes (shown below) and a Documentation
update on on-disk format high-level overview.

Thanks,
Gao Xiang

The following changes since commit 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4:

  Linux 7.4-rc1 (2026-11-01 13:26:31 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git tags/erofs-for-7.4-rc3-fixes

for you to fetch changes up to 7906eac042a4d6facd3b2dcebfe7179fedfcf1f2:

  docs: erofs: refine the on-disk overview (2026-11-12 10:31:25 +0100)

----------------------------------------------------------------
Changes since last update:

 - Fix stacked fs check for file-backed mounts with extra devices

 - Disallow file-backed mounts on shared backing inodes

 - Reset metadata offsets when fsoffset= is used to fix xattr reads
   inside and outside the metabox in ont shot

 - Refine on-disk format summary

----------------------------------------------------------------
Daejun Park (2):
      erofs: apply the stacked fs check to extra file-backed devices
      erofs: treat files shared by inode_share as stacked

Gao Xiang (1):
      docs: erofs: refine the on-disk overview

Zhan Xusheng (1):
      erofs: reset buf->off in erofs_init_metabuf()

 Documentation/filesystems/erofs.rst | 120 +++++++++++++++++++++++++++---------
 fs/erofs/data.c                     |   1 +
 fs/erofs/super.c                    |  23 ++++++-
 3 files changed, 112 insertions(+), 32 deletions(-)