linux-stable.git/drivers/staging/android/logger.c, branch v3.13

Merge git://git.kvack.org/~bcrl/aio-next

2013-09-13T17:55:58+00:00

Pull aio changes from Ben LaHaise:
 "First off, sorry for this pull request being late in the merge window.
  Al had raised a couple of concerns about 2 items in the series below.
  I addressed the first issue (the race introduced by Gu's use of
  mm_populate()), but he has not provided any further details on how he
  wants to rework the anon_inode.c changes (which were sent out months
  ago but have yet to be commented on).

  The bulk of the changes have been sitting in the -next tree for a few
  months, with all the issues raised being addressed"

* git://git.kvack.org/~bcrl/aio-next: (22 commits)
  aio: rcu_read_lock protection for new rcu_dereference calls
  aio: fix race in ring buffer page lookup introduced by page migration support
  aio: fix rcu sparse warnings introduced by ioctx table lookup patch
  aio: remove unnecessary debugging from aio_free_ring()
  aio: table lookup: verify ctx pointer
  staging/lustre: kiocb->ki_left is removed
  aio: fix error handling and rcu usage in "convert the ioctx list to table lookup v3"
  aio: be defensive to ensure request batching is non-zero instead of BUG_ON()
  aio: convert the ioctx list to table lookup v3
  aio: double aio_max_nr in calculations
  aio: Kill ki_dtor
  aio: Kill ki_users
  aio: Kill unneeded kiocb members
  aio: Kill aio_rw_vect_retry()
  aio: Don't use ctx->tail unnecessarily
  aio: io_cancel() no longer returns the io_event
  aio: percpu ioctx refcount
  aio: percpu reqs_available
  aio: reqs_active -> reqs_available
  aio: fix build when migration is disabled
  ...

aio: Kill aio_rw_vect_retry()

2013-07-30T15:53:12+00:00

This code doesn't serve any purpose anymore, since the aio retry
infrastructure has been removed.

This change should be safe because aio_read/write are also used for
synchronous IO, and called from do_sync_read()/do_sync_write() - and
there's no looping done in the sync case (the read and write syscalls).

Signed-off-by: Kent Overstreet 
Cc: Zach Brown 
Cc: Felipe Balbi 
Cc: Greg Kroah-Hartman 
Cc: Mark Fasheh 
Cc: Joel Becker 
Cc: Rusty Russell 
Cc: Jens Axboe 
Cc: Asai Thambi S P 
Cc: Selvan Mani 
Cc: Sam Bradshaw 
Cc: Jeff Moyer 
Cc: Al Viro 
Cc: Benjamin LaHaise 
Signed-off-by: Benjamin LaHaise

staging: android: logger: Correct write offset reset on error

2013-07-23T22:08:50+00:00

In the situation that a writer fails to copy data from userspace it will reset
the write offset to the value it had before it went to sleep. This discarding
any messages written while aquiring the mutex.

Therefore the reset offset needs to be retrieved after acquiring the mutex.

Cc: Android Kernel Team 
Signed-off-by: Bjorn Andersson 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman

more open-coded file_inode() calls

2013-06-29T08:57:21+00:00

Signed-off-by: Al Viro

staging: android: logger: use kuid_t instead of uid_t

2013-05-16T22:37:51+00:00

Use kuid_t instead of uid_t, to pass the UIDGID_STRICT_TYPE_CHECKS.

Signed-off-by: Xiong Zhou 
Signed-off-by: Greg Kroah-Hartman

aio: don't include aio.h in sched.h

2013-05-08T03:16:25+00:00

Faster kernel compiles by way of fewer unnecessary includes.

[akpm@linux-foundation.org: fix fallout]
[akpm@linux-foundation.org: fix build]
Signed-off-by: Kent Overstreet 
Cc: Zach Brown 
Cc: Felipe Balbi 
Cc: Greg Kroah-Hartman 
Cc: Mark Fasheh 
Cc: Joel Becker 
Cc: Rusty Russell 
Cc: Jens Axboe 
Cc: Asai Thambi S P 
Cc: Selvan Mani 
Cc: Sam Bradshaw 
Cc: Jeff Moyer 
Cc: Al Viro 
Cc: Benjamin LaHaise 
Reviewed-by: "Theodore Ts'o" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

staging: android: logger: enforce GID and CAP check on log flush

2013-03-05T08:38:44+00:00

Restrict log flushing to those in the logs group, or
anyone with CAP_SYSLOG.

Cc: Android Kernel Team 
Cc: Charndeep Grewal 
Signed-off-by: Charndeep Grewal 
Signed-off-by: John Stultz 
Signed-off-by: Greg Kroah-Hartman

staging: android: logger: Allow a UID to read it's own log entries

2013-03-05T08:38:44+00:00

Modify the kernel logger to record the UID associated with
the log entries. Always allow the same UID which generated a
log message to read the log message.

Allow anyone in the logs group, or anyone with CAP_SYSLOG, to
read all log entries.

In addition, allow the client to upgrade log formats, so they
can get additional information from the kernel.

Cc: Android Kernel Team 
Cc: Nick Kralevich 
Signed-off-by: Nick Kralevich 
Signed-off-by: John Stultz 
Signed-off-by: Greg Kroah-Hartman

Staging: Android: logger: module_exit implementation

2012-11-27T00:01:30+00:00

This patch creates the module_exit for the android logger
so that it can be loaded and unloaded as a module.

The android logger is already declared as a tristate in the
Kconfig but the module_exit function was missing.

device_initcall works also with modprobe since include/linux/init.h:

 #define module_init(x)  __initcall(x);
 ...
 #define __initcall(fn) device_initcall(fn)

Tested against f4a75d2eb7b1e2206094b901be09adb31ba63681 Linux 3.7-rc6

Signed-off-by: Luca Clementi 
Cc: Brian Swetland 
Cc: Robert Love 
Signed-off-by: Greg Kroah-Hartman

staging: android: logger: Finish documentation of two structs

2012-08-14T02:04:25+00:00

Signed-off-by: Cruz Julian Bishop 
Signed-off-by: Greg Kroah-Hartman