Unverified Commit 70d7f7db authored by Christian Brauner's avatar Christian Brauner
Browse files

Merge patch series "File abstractions needed by Rust Binder" 

Alice Ryhl <aliceryhl@google.com> says:

This patchset contains the file abstractions needed by the Rust
implementation of the Binder driver.

Please see the Rust Binder RFC for usage examples:
https://lore.kernel.org/rust-for-linux/20231101-rust-binder-v1-0-08ba9197f637@google.com

Users of "rust: types: add `NotThreadSafe`":
	[PATCH 5/9] rust: file: add `FileDescriptorReservation`

Users of "rust: task: add `Task::current_raw`":
	[PATCH 7/9] rust: file: add `Kuid` wrapper
	[PATCH 8/9] rust: file: add `DeferredFdCloser`

Users of "rust: file: add Rust abstraction for `struct file`":
	[PATCH RFC 02/20] rust_binder: add binderfs support to Rust binder
	[PATCH RFC 03/20] rust_binder: add threading support

Users of "rust: cred: add Rust abstraction for `struct cred`":
	[PATCH RFC 05/20] rust_binder: add nodes and context managers
	[PATCH RFC 06/20] rust_binder: add oneway transactions
	[PATCH RFC 11/20] rust_binder: send nodes in transaction
	[PATCH RFC 13/20] rust_binder: add BINDER_TYPE_FD support

Users of "rust: security: add abstraction for secctx":
	[PATCH RFC 06/20] rust_binder: add oneway transactions

Users of "rust: file: add `FileDescriptorReservation`":
	[PATCH RFC 13/20] rust_binder: add BINDER_TYPE_FD support
	[PATCH RFC 14/20] rust_binder: add BINDER_TYPE_FDA support

Users of "rust: file: add `Kuid` wrapper":
	[PATCH RFC 05/20] rust_binder: add nodes and context managers
	[PATCH RFC 06/20] rust_binder: add oneway transactions

Users of "rust: file: add abstraction for `poll_table`":
	[PATCH RFC 07/20] rust_binder: add epoll support

This patchset has some uses of read_volatile in place of READ_ONCE.
Please see the following rfc for context on this:
https://lore.kernel.org/all/20231025195339.1431894-1-boqun.feng@gmail.com/

* patches from https://lore.kernel.org/r/20240915-alice-file-v10-0-88484f7a3dcf@google.com:
  rust: file: add abstraction for `poll_table`
  rust: file: add `Kuid` wrapper
  rust: file: add `FileDescriptorReservation`
  rust: security: add abstraction for secctx
  rust: cred: add Rust abstraction for `struct cred`
  rust: file: add Rust abstraction for `struct file`
  rust: task: add `Task::current_raw`
  rust: types: add `NotThreadSafe`

Link: https://lore.kernel.org/r/20240915-alice-file-v10-0-88484f7a3dcf@google.com


Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parents 8cf0b939 ac681835

fs/file.c

+7 −0
Original line number Diff line number Diff line
@@ -1096,6 +1096,13 @@ EXPORT_SYMBOL(task_lookup_next_fdget_rcu); 
 *

 * The fput_needed flag returned by fget_light should be passed to the

 * corresponding fput_light.

 *

 * (As an exception to rule 2, you can call filp_close between fget_light and

 * fput_light provided that you capture a real refcount with get_file before

 * the call to filp_close, and ensure that this real refcount is fput *after*

 * the fput_light call.)

 *

 * See also the documentation in rust/kernel/file.rs.

 */

static inline struct fd __fget_light(unsigned int fd, fmode_t mask)

{

rust/bindings/bindings_helper.h

+6 −0
Original line number Diff line number Diff line
@@ -10,14 +10,20 @@ 
#include <linux/blk-mq.h>

#include <linux/blk_types.h>

#include <linux/blkdev.h>

#include <linux/cred.h>

#include <linux/errname.h>

#include <linux/ethtool.h>

#include <linux/file.h>

#include <linux/firmware.h>

#include <linux/fs.h>

#include <linux/jiffies.h>

#include <linux/mdio.h>

#include <linux/phy.h>

#include <linux/pid_namespace.h>

#include <linux/poll.h>

#include <linux/refcount.h>

#include <linux/sched.h>

#include <linux/security.h>

#include <linux/slab.h>

#include <linux/wait.h>

#include <linux/workqueue.h>

rust/helpers/cred.c

0 → 100644
+13 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



#include <linux/cred.h>



const struct cred *rust_helper_get_cred(const struct cred *cred)

{

	return get_cred(cred);

}



void rust_helper_put_cred(const struct cred *cred)

{

	put_cred(cred);

}

rust/helpers/fs.c

0 → 100644
+12 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



/*

 * Copyright (C) 2024 Google LLC.

 */



#include <linux/fs.h>



struct file *rust_helper_get_file(struct file *f)

{

	return get_file(f);

}

rust/helpers/helpers.c

+3 −0
Original line number Diff line number Diff line
@@ -11,12 +11,15 @@ 
#include "bug.c"

#include "build_assert.c"

#include "build_bug.c"

#include "cred.c"

#include "err.c"

#include "fs.c"

#include "kunit.c"

#include "mutex.c"

#include "page.c"

#include "rbtree.c"

#include "refcount.c"

#include "security.c"

#include "signal.c"

#include "slab.c"

#include "spinlock.c"