fs: pass dentry to set acl method

The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acl

fs: pass dentry to set acl method

The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].

Since some filesystem rely on the dentry being available to them when
setting posix acls (e.g., 9p and cifs) they cannot rely on set acl inode
operation. But since ->set_acl() is required in order to use the generic
posix acl xattr handlers filesystems that do not implement this inode
operation cannot use the handler and need to implement their own
dedicated posix acl handlers.

Update the ->set_acl() inode method to take a dentry argument. This
allows all filesystems to rely on ->set_acl().

As far as I can tell all codepaths can be switched to rely on the dentry
instead of just the inode. Note that the original motivation for passing
the dentry separate from the inode instead of just the dentry in the
xattr handlers was because of security modules that call
security_d_instantiate(). This hook is called during
d_instantiate_new(), d_add(), __d_instantiate_anon(), and
d_splice_alias() to initialize the inode's security context and possibly
to set security.* xattrs. Since this only affects security.* xattrs this
is completely irrelevant for posix acls.

Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>

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Merge tag 'v6.1-rc1' into next

Merge with mainline to bring in the latest changes to twl4030 driver.

Merge branch 'next' into for-linus

Prepare input updates for 6.1 merge window.

Merge tag 'v6.0' into rdma.git for-next

Trvial merge conflicts against rdma.git for-rc resolved matching
linux-next:
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
drivers/infini

Merge tag 'v6.0' into rdma.git for-next

Trvial merge conflicts against rdma.git for-rc resolved matching
linux-next:
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
drivers/infiniband/hw/hns/hns_roce_main.c

https://lore.kernel.org/r/20220929124005.105149-1-broonie@kernel.org

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Merge branch 'for-6.1/logitech' into for-linus

- Add hanlding of all Bluetooth HID++ devices and fixes in hid++
(Bastien Nocera)

Merge drm/drm-next into drm-intel-gt-next

Daniele needs 84d4333c1e28 ("misc/mei: Add NULL check to component match
callback functions") in order to merge the DG2 HuC patches.

Signed-off-by: Tvrtko

Merge drm/drm-next into drm-intel-gt-next

Daniele needs 84d4333c1e28 ("misc/mei: Add NULL check to component match
callback functions") in order to merge the DG2 HuC patches.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

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Merge branch 'for-6.1/nvdimm' into libnvdimm-for-next

Add v6.1 content on top of some straggling updates that missed v6.0.

Merge tag 'irqchip-fixes-6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent

Pull more irqchip fixes for 6.0 from Marc Zyngier:

- A couple of configuration f

Merge tag 'irqchip-fixes-6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent

Pull more irqchip fixes for 6.0 from Marc Zyngier:

- A couple of configuration fixes for the recently merged Loongarch drivers

- A fix to avoid dynamic allocation of a cpumask which was causing issues
with PREEMPT_RT and the GICv3 ITS

- A tightening of an error check in the stm32 exti driver

Link: https://lore.kernel.org/r/20220916085158.2592518-1-maz@kernel.org

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Merge branch 'mlx5-vfio' into mlx5-next

Merge net/mlx5 dependencies for device DMA logging.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>

Merge branch 'for-6.0/dax' into libnvdimm-fixes

Pick up another "Soft Reservation" fix for v6.0-final on top of some
straggling nvdimm fixes that missed v5.19.

Merge branch 'for-6.0-fixes' into for-6.1

for-6.0 has the following fix for cgroup_get_from_id().

836ac87d ("cgroup: fix cgroup_get_from_id")

which conflicts with the following two commits in fo

Merge branch 'for-6.0-fixes' into for-6.1

for-6.0 has the following fix for cgroup_get_from_id().

836ac87d ("cgroup: fix cgroup_get_from_id")

which conflicts with the following two commits in for-6.1.

4534dee9 ("cgroup: cgroup: Honor caller's cgroup NS when resolving cgroup id")
fa7e439c ("cgroup: Homogenize cgroup_get_from_id() return value")

While the resolution is straightforward, the code ends up pretty ugly
afterwards. Let's pull for-6.0-fixes into for-6.1 so that the code can be
fixed up there.

Signed-off-by: Tejun Heo <tj@kernel.org>

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Merge tag 'v6.0-rc6' into locking/core, to refresh the branch

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge tag 'v6.0-rc5' into i2c/for-mergewindow

Linux 6.0-rc5

Merge drm/drm-next into drm-misc-next

We need 6.0-rc1 to merge the backlight rework PR.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

MediaTek Helio X10 MT6795 - MT6331/6332 Regulators

Merge series from AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>:

In an effort to give some love to the apparently forgotten

MediaTek Helio X10 MT6795 - MT6331/6332 Regulators

Merge series from AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>:

In an effort to give some love to the apparently forgotten MT6795 SoC,
I am upstreaming more components that are necessary to support platforms
powered by this one apart from a simple boot to serial console.

This series adds support for the regulators found in MT6331 and MT6332
main/companion PMICs.

Adding support to each driver in each subsystem is done in different
patch series as to avoid spamming uninteresting patches to maintainers.

Tested on a MT6795 Sony Xperia M5 (codename "Holly") smartphone.

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ASoC: Merge tag 'v6.0-rc4' into asoc-6.1

Linux 6.0-rc4 so we can test on BeagleBone again.

Merge branch 'am5748-fix' into fixes

Merge 6.0-rc4 into usb-next

We need the USB fixes in here and this resolves the merge issue in:
drivers/usb/dwc3/gadget.c

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg K

Merge 6.0-rc4 into usb-next

We need the USB fixes in here and this resolves the merge issue in:
drivers/usb/dwc3/gadget.c

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Merge 6.0-rc4 into tty-next

We need the tty/serial fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge 6.0-rc4 into staging-next

Resolves the merge issue with:
drivers/staging/r8188eu/os_dep/os_intfs.c

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge 6.0-rc4 into char-misc-next

We need the char-misc fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge branch 'linus' into x86/mm, to refresh the branch

This branch is ~14k commits behind upstream, and has an old merge base
from early into the merge window, refresh it to v6.0-rc3+fixes before
q

Merge branch 'linus' into x86/mm, to refresh the branch

This branch is ~14k commits behind upstream, and has an old merge base
from early into the merge window, refresh it to v6.0-rc3+fixes before
queueing up new commits.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Merge tag 'kvm-s390-master-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

PCI interpretation compile fixes

Merge back thermal control material for v6.1.

Merge branch 'sched/warnings' into sched/core, to pick up WARN_ON_ONCE() conversion commit

Merge in the BUG_ON() => WARN_ON_ONCE() conversion commit.

Signed-off-by: Ingo Molnar <mingo@kernel.org>