Btrfs fixes for 7.3-rc4

Hi,

please pull the following fixes. Among the regular fixes, there are two that were reported recently and have user impact:

- filesystem id is now stable again on the default and common case (it broke openconnect key derivation, while this is not secure, it's still in use), the intention was to change id for the temp_fsid use case

- fix detection of /dev/root and rename it after device scan, this broke booting of initramdisk-less system with grub2 as the probe needs the real device

Regular fixes:

- don't store compressed inline extent if the size is larger than uncompressed

- in zoned mode, handle activation of zones for all supported block group profiles in case there are still free ones left

- check space for a chunk item when reading sys array from superblock

- allow using space reserves when removing verity items fails

- fix error handling after free space tree rebuild fails

- abort transaction if reflink or hole punching fails and it's not possible to update the inode

- properly protect block group iteration during device replace start

- error message fixups

----------------------------------------------------------------
The following changes since commit 09f1294ee2abee7fe1c2d600671498b7642e0fe0:

btrfs: tree-checker: validate name length for extref items (2026-09-07 18:36:38 +0200)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git tags/for-7.3-rc3-tag

for you to fetch changes up to 72de4807ba84da485dda1a91572d66da9149e95a:

btrfs: derive f_fsid with dev_t only when temp_fsid is active (2026-09-17 19:45:12 +0200)

----------------------------------------------------------------
Anand Jain (1):
btrfs: derive f_fsid with dev_t only when temp_fsid is active

Daniel Linjama (1):
btrfs: handle lack of space when cleaning up verity items

Filipe Manana (5):
btrfs: tree-checker: print dev extent offset in error message
btrfs: tree-checker: fix error message regarding free space extent items
btrfs: fix creation of compressed inline extents that don't save space
btrfs: abort transaction on failure to update inode for hole punching and reflinking
btrfs: check if there is space for chunk item when validating sys chunk array

Guanghui Yang (1):
btrfs: clear free space tree creation state on rebuild failure

Hongling Zeng (1):
btrfs: take commit root semaphore when iterating in mark_block_group_to_copy()

Johannes Thumshirn (1):
btrfs: zoned: handle RAID profiles in btrfs_can_activate_zone()

Qu Wenruo (1):
btrfs: add "/dev/root" exception for device path update

 fs/btrfs/dev-replace.c     |  1 +
 fs/btrfs/disk-io.c         |  4 ++++
 fs/btrfs/file.c            |  4 +++-
 fs/btrfs/free-space-tree.c | 14 ++++++++++----
 fs/btrfs/inode.c           | 18 +++++++++++++++++-
 fs/btrfs/super.c           |  8 ++++++--
 fs/btrfs/tree-checker.c    |  4 ++--
 fs/btrfs/verity.c          | 18 ++++++++++++++++--
 fs/btrfs/volumes.c         | 33 ++++++++++++++++++++++++++++++++-
 fs/btrfs/zoned.c           |  5 +++++
 10 files changed, 96 insertions(+), 13 deletions(-)

-ENOSUCHTAG.

I see a 'for-7.3-rc3' branch that has that top commit in it, but no signed tags. Forgot to push?

Linus

Yes, sorry, now pushed.