[PATCH 0/7] lifetime-parameterized DRM File private data

[Danilo Krummrich <dakr@kernel.org>]

DRM file private data is currently 'static, preventing drivers from
borrowing registration-scoped resources in their per-file state. This
series makes Driver::File lifetime-parameterized through ForLt, so file
data can borrow from RegistrationData.

File data is guaranteed to be dropped before registration data, either
when the file is closed normally or when the device is unregistered,
whichever comes first. To enforce this during unbind, Registration::drop()
revokes all open file data and waits for in-flight closes before dropping
registration data.

fops.open is wrapped in a RegistrationGuard (drm_dev_enter/exit) so that
after drm_dev_unplug() all successfully opened files are accounted for.
GEM open/close callbacks are similarly gated to prevent access to stale
file data after unbind.

The series is based on drm-rust-next with [1] applied and [2] merged, a branch
with the patches is available in [3].

[1] https://lore.kernel.org/all/20260726223613.1242940-1-dakr@kernel.org/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git/tag/?h=dd-lifetimes-7.3-rc1
[3] https://git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=drm/file

Danilo Krummrich (7):
  rust: drm: rename Ioctl device context to Userspace
  rust: drm: gem: gate open/close callbacks with RegistrationGuard
  rust: drm: move file_operations from gem to device
  rust: fs: add iminor() helper
  rust: drm: wrap fops open with RegistrationGuard
  rust: drm: make Driver::File lifetime-parameterized
  rust: drm: return impl PinInit from DriverFile::open()

 drivers/gpu/drm/nova/driver.rs |   5 +-
 drivers/gpu/drm/nova/file.rs   |  13 ++-
 drivers/gpu/drm/nova/gem.rs    |   8 +-
 drivers/gpu/drm/tyr/driver.rs  |   5 +-
 drivers/gpu/drm/tyr/file.rs    |  13 +--
 rust/helpers/fs.c              |   5 ++
 rust/kernel/drm/device.rs      | 139 ++++++++++++++++++++++++++----
 rust/kernel/drm/driver.rs      |  69 ++++++++++++++-
 rust/kernel/drm/file.rs        | 151 ++++++++++++++++++++++-----------
 rust/kernel/drm/gem/mod.rs     |  48 +++++------
 rust/kernel/drm/gem/shmem.rs   |  14 +--
 rust/kernel/drm/ioctl.rs       |  14 +--
 rust/kernel/drm/mod.rs         |   2 +-
 13 files changed, 356 insertions(+), 130 deletions(-)

-- 
2.55.0