mbox series

[v2,00/18] btrfs: convert to the new mount API

Message ID cover.1699470345.git.josef@toxicpanda.com (mailing list archive)
Headers show
Series btrfs: convert to the new mount API | expand

Message

Josef Bacik Nov. 8, 2023, 7:08 p.m. UTC
v1->v2:
- Fixed up some nits and paste errors.
- Fixed build failure with !ZONED.
- Fixed accidentally dropping BINARY_MOUNTDATA flag.
- Added Reviewed-by's collected up to this point.

These have run through our CI a few times, they haven't introduced any
regressions.

--- Original email ---
Hello,

These patches convert us to use the new mount API.  Christian tried to do this a
few months ago, but ran afoul of our preference to have a bunch of small
changes.  I started this series before I knew he had tried to convert us, so
there's a fair bit that's different, but I did copy his approach for the remount
bit.  I've linked to the original patch where I took inspiration, Christian let
me know if you want some other annotation for credit, I wasn't really sure the
best way to do that.

There are a few preparatory patches in the beginning, and then cleanups at the
end.  I took each call back one at a time to try and make it as small as
possible.  The resulting code is less, but the diffstat shows more insertions
that deletions.  This is because there are some big comment blocks around some
of the more subtle things that we're doing to hopefully make it more clear.

This is currently running through our CI.  I thought it was fine last week but
we had a bunch of new failures when I finished up the remount behavior.  However
today I discovered this was a regression in btrfs-progs, and I'm re-running the
tests with the fixes.  If anything major breaks in the CI I'll resend with
fixes, but I'm pretty sure these patches will pass without issue.

I utilized __maybe_unused liberally to make sure everything compiled while
applied.  The only "big" patch is where I went and removed the old API.  If
requested I can break that up a bit more, but I didn't think it was necessary.
I did make sure to keep it in its own patch, so the switch to the new mount API
path only has things we need to support the new mount API, and then the next
patch removes the old code.  Thanks,

Josef

Christian Brauner (1):
  fs: indicate request originates from old mount api

Josef Bacik (17):
  btrfs: split out the mount option validation code into its own helper
  btrfs: set default compress type at btrfs_init_fs_info time
  btrfs: move space cache settings into open_ctree
  btrfs: do not allow free space tree rebuild on extent tree v2
  btrfs: split out ro->rw and rw->ro helpers into their own functions
  btrfs: add a NOSPACECACHE mount option flag
  btrfs: add fs_parameter definitions
  btrfs: add parse_param callback for the new mount api
  btrfs: add fs context handling functions
  btrfs: add reconfigure callback for fs_context
  btrfs: add get_tree callback for new mount API
  btrfs: handle the ro->rw transition for mounting different subovls
  btrfs: switch to the new mount API
  btrfs: move the device specific mount options to super.c
  btrfs: remove old mount API code
  btrfs: move one shot mount option clearing to super.c
  btrfs: set clear_cache if we use usebackuproot

 fs/btrfs/disk-io.c |   76 +-
 fs/btrfs/disk-io.h |    1 -
 fs/btrfs/fs.h      |   15 +-
 fs/btrfs/super.c   | 2421 +++++++++++++++++++++++---------------------
 fs/btrfs/super.h   |    5 +-
 fs/btrfs/zoned.c   |   16 +-
 fs/btrfs/zoned.h   |    6 +-
 fs/namespace.c     |   11 +
 8 files changed, 1317 insertions(+), 1234 deletions(-)

Comments

Neal Gompa Nov. 8, 2023, 11:02 p.m. UTC | #1
On Wed, Nov 8, 2023 at 2:09 PM Josef Bacik <josef@toxicpanda.com> wrote:
>
> v1->v2:
> - Fixed up some nits and paste errors.
> - Fixed build failure with !ZONED.
> - Fixed accidentally dropping BINARY_MOUNTDATA flag.
> - Added Reviewed-by's collected up to this point.
>
> These have run through our CI a few times, they haven't introduced any
> regressions.
>
> --- Original email ---
> Hello,
>
> These patches convert us to use the new mount API.  Christian tried to do this a
> few months ago, but ran afoul of our preference to have a bunch of small
> changes.  I started this series before I knew he had tried to convert us, so
> there's a fair bit that's different, but I did copy his approach for the remount
> bit.  I've linked to the original patch where I took inspiration, Christian let
> me know if you want some other annotation for credit, I wasn't really sure the
> best way to do that.
>
> There are a few preparatory patches in the beginning, and then cleanups at the
> end.  I took each call back one at a time to try and make it as small as
> possible.  The resulting code is less, but the diffstat shows more insertions
> that deletions.  This is because there are some big comment blocks around some
> of the more subtle things that we're doing to hopefully make it more clear.
>
> This is currently running through our CI.  I thought it was fine last week but
> we had a bunch of new failures when I finished up the remount behavior.  However
> today I discovered this was a regression in btrfs-progs, and I'm re-running the
> tests with the fixes.  If anything major breaks in the CI I'll resend with
> fixes, but I'm pretty sure these patches will pass without issue.
>
> I utilized __maybe_unused liberally to make sure everything compiled while
> applied.  The only "big" patch is where I went and removed the old API.  If
> requested I can break that up a bit more, but I didn't think it was necessary.
> I did make sure to keep it in its own patch, so the switch to the new mount API
> path only has things we need to support the new mount API, and then the next
> patch removes the old code.  Thanks,
>
> Josef
>
> Christian Brauner (1):
>   fs: indicate request originates from old mount api
>
> Josef Bacik (17):
>   btrfs: split out the mount option validation code into its own helper
>   btrfs: set default compress type at btrfs_init_fs_info time
>   btrfs: move space cache settings into open_ctree
>   btrfs: do not allow free space tree rebuild on extent tree v2
>   btrfs: split out ro->rw and rw->ro helpers into their own functions
>   btrfs: add a NOSPACECACHE mount option flag
>   btrfs: add fs_parameter definitions
>   btrfs: add parse_param callback for the new mount api
>   btrfs: add fs context handling functions
>   btrfs: add reconfigure callback for fs_context
>   btrfs: add get_tree callback for new mount API
>   btrfs: handle the ro->rw transition for mounting different subovls
>   btrfs: switch to the new mount API
>   btrfs: move the device specific mount options to super.c
>   btrfs: remove old mount API code
>   btrfs: move one shot mount option clearing to super.c
>   btrfs: set clear_cache if we use usebackuproot
>
>  fs/btrfs/disk-io.c |   76 +-
>  fs/btrfs/disk-io.h |    1 -
>  fs/btrfs/fs.h      |   15 +-
>  fs/btrfs/super.c   | 2421 +++++++++++++++++++++++---------------------
>  fs/btrfs/super.h   |    5 +-
>  fs/btrfs/zoned.c   |   16 +-
>  fs/btrfs/zoned.h   |    6 +-
>  fs/namespace.c     |   11 +
>  8 files changed, 1317 insertions(+), 1234 deletions(-)
>
> --
> 2.41.0
>

The series looks reasonable to me. I do appreciate the extra effort in
the documents and references to give me context when looking through
it all.

Reviewed-by: Neal Gompa <neal@gompa.dev>
Johannes Thumshirn Nov. 9, 2023, 11:55 a.m. UTC | #2
Looks good from what I can tell,
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Christian Brauner Nov. 9, 2023, 12:55 p.m. UTC | #3
On Wed, Nov 08, 2023 at 02:08:35PM -0500, Josef Bacik wrote:
> v1->v2:
> - Fixed up some nits and paste errors.
> - Fixed build failure with !ZONED.
> - Fixed accidentally dropping BINARY_MOUNTDATA flag.
> - Added Reviewed-by's collected up to this point.
> 
> These have run through our CI a few times, they haven't introduced any
> regressions.
> 
> --- Original email ---
> Hello,
> 
> These patches convert us to use the new mount API.  Christian tried to do this a
> few months ago, but ran afoul of our preference to have a bunch of small
> changes.  I started this series before I knew he had tried to convert us, so
> there's a fair bit that's different, but I did copy his approach for the remount
> bit.  I've linked to the original patch where I took inspiration, Christian let
> me know if you want some other annotation for credit, I wasn't really sure the
> best way to do that.

Thank you for pointing out the work that I did and for building on the
bits of it that you could reuse. That's enough credit for me.

Thanks for converting btrfs and I hope we can get this merged soon. This
was the last really major filesystems that hadn't been converted yet so
I'm very glad to see this done.

Acked-by: Christian Brauner <brauner@kernel.org>