[PATCH V3 0/2] Supporting same fsid mounting through the single-dev compat_ro feature

["Guilherme G. Piccoli" <gpiccoli@igalia.com>]

Hi folks, this is the third round of the same fsid mounting patch. Our goal
is to allow btrfs to have the same filesystem mounting at the same time;
for more details, please take a look in the:

V2: https://lore.kernel.org/linux-btrfs/20230803154453.1488248-1-gpiccoli@igalia.com/

V1: https://lore.kernel.org/linux-btrfs/20230504170708.787361-1-gpiccoli@igalia.com/


In this V3, besides small changes / improvements in the patches (see the
changelog per patch), we dropped the module parameter workaround (which
was the 3rd patch in V2) and implemented the fstests test (as suggested
by Josef): https://lore.kernel.org/fstests/20230830221943.3375955-1-gpiccoli@igalia.com/

As usual, suggestions / reviews are greatly appreciated.
Thanks in advance!


Guilherme G. Piccoli (2):
  btrfs-progs: Add the single-dev feature (to both mkfs/tune)
  btrfs: Introduce the single-dev feature

btrfs-progs:
 common/fsfeatures.c        |  7 ++++
 kernel-shared/ctree.h      |  3 +-
 kernel-shared/uapi/btrfs.h |  7 ++++
 mkfs/main.c                |  4 +-
 tune/main.c                | 76 ++++++++++++++++++++++++--------------
 5 files changed, 67 insertions(+), 30 deletions(-)

kernel:
 fs/btrfs/disk-io.c         | 17 +++++++-
 fs/btrfs/fs.h              |  3 +-
 fs/btrfs/ioctl.c           | 18 ++++++++
 fs/btrfs/super.c           |  8 ++--
 fs/btrfs/sysfs.c           |  2 +
 fs/btrfs/volumes.c         | 84 ++++++++++++++++++++++++++++++++------
 fs/btrfs/volumes.h         |  3 +-
 include/uapi/linux/btrfs.h |  7 ++++
 8 files changed, 122 insertions(+), 20 deletions(-)

-- 
2.41.0