Krzysztof Helt [Tue, 16 Oct 2007 08:29:04 +0000 (01:29 -0700)]
fbdev: change asm/uaccess.h to linux/uaccess.h
This patch replaces <asm/uaccess.h> with <linux/uaccess.h> after the
checkpatch.pl hint. The include of <asm/uaccess.h> is removed if the driver
does not use it.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ralf Baechle [Tue, 16 Oct 2007 08:29:04 +0000 (01:29 -0700)]
vt: Fix warnings in selection.h
<linux/selection.h> assumes that struct tty_struct has previously been
included. If not, this pile of warnings will result:
CC [M] drivers/video/console/newport_con.o
In file included from drivers/video/console/newport_con.c:18:
include/linux/selection.h:16: warning: 'struct tty_struct' declared inside param
eter list
include/linux/selection.h:16: warning: its scope is only this definition or decl
aration, which is probably not what you want
include/linux/selection.h:17: warning: 'struct tty_struct' declared inside param
eter list
include/linux/selection.h:20: warning: 'struct tty_struct' declared inside param
eter list
Fixed by adding a forward declaration of struct tty_struct.
Ralf Baechle [Tue, 16 Oct 2007 08:29:03 +0000 (01:29 -0700)]
fbcon: Convert struct font_desc to use ISO C initializers
Akpm's patch "newport_con warning fix" got me to look at the console drivers
again and one thing that I noticed was that none of the fonts was using ISO
initializers for it's fonts.
Krzysztof Helt [Tue, 16 Oct 2007 08:29:02 +0000 (01:29 -0700)]
s3c2410fb: byte ordering fixes
This patch sets correct bits related to the byte ordering of the
framebuffer. This was tested on little endian kernel only. The big endian
kernel may require different settings.
The patch also adds 32 bpp mode which is called 24 bpp by Samsung. One
pixel takes 32 bits but only 24 bits are used in this mode.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:57 +0000 (01:28 -0700)]
s3c2410fb: add margin fields to s3c2410fb_display
This patch adds margins fields to the s3c2410fb_display
structure. It also sets display type and horizontal
margins in all platform files that use the s3c2410fb
driver.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:56 +0000 (01:28 -0700)]
s3c2410fb: multi-display support
This patch adds a new structure to describe and handle
more than one panel (display mode) for the s3c2410 framebuffer.
This structure is added after the pxafb driver.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:54 +0000 (01:28 -0700)]
s3c2410fb: code cleanup
This patch cleans up the driver a bit. It contains
coding style fixes (pointed by Lindent and checkpatch),
white space clean ups and few minor code improvements.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:53 +0000 (01:28 -0700)]
pm2fb: Permedia 2V hardware cursor support
This patch adds hardware cursor support for Permedia 2V chips.
The hardware cursor is disabled by default. It does not blink - the
same issue is mentioned in the x11 driver.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fbdev: Fix incorrect timings in some modedb entries
Reported by: John Lumby <johnlumby@hotmail.com>
Some of the entries in the mode database does not match the comments and/or
the refresh field. Adjust the timings so they match with both the comments
and the refresh rate.
Krzysztof Helt [Tue, 16 Oct 2007 08:28:45 +0000 (01:28 -0700)]
tdfxfb: 3 fixes
This patch fixes 3 issues:
- transparency handling in tdfxfb
- panning with more than 4096 virtual height and acceleration (acceleration
with x & y > 4096)
- exit paths on errors in tdfxfb_probe()
Additionally it sets a FBINFO_READS_FAST flag to use smart blitter scrolling
(speed up on tdfxfb).
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hans J. Koch [Tue, 16 Oct 2007 08:28:41 +0000 (01:28 -0700)]
pxafb: Add support for other palette formats
This patch adds support for the other three palette formats possible with
the PXA LCD controller. This is required on boards where an LCD is connected
with all its 18 bits. With this patch, it's possible to use an 8-bit mode
with 18-bit palette entries. This used to be possible in 2.4 kernels but
disappeared in 2.6. With current kernels, you can only get wrong colours
out of an LCD connected this way.
Users can choose the palette format by doing something like this
in their board definition:
Raphael Assenat [Tue, 16 Oct 2007 08:28:40 +0000 (01:28 -0700)]
mbxfb: Improvements and new features
This contains the following changes:
* Overlay surface alpha is configured separately from the overlay. This
prevents display glitches (configure and fill the overlay first, set
alpha to a visible value next)
* Added an ioctl for configuring transparency of the Overlay and graphics
planes. Blend mode, colorkey mode and global alpha mode are supported.
* Added an ioctl for setting the plane order. The overlay plance can be placed
over or
under the graphics plane.
* Added an ioctl for setting and reading chip registers, with mask.
Ben Dooks [Tue, 16 Oct 2007 08:28:39 +0000 (01:28 -0700)]
sm501fb: Ensure panel interface is not tristated when setup
When we setup the panel interface whilst configuring the
framebuffer, we should ensure the panel interface is not
in tristate, in case the bootloader or previous setup has
not enabled it.
Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ben Dooks [Tue, 16 Oct 2007 08:28:37 +0000 (01:28 -0700)]
sm501fb: update suspend and resume code
The suspend and resume code is failing to restore the CRT control
register, thus causing the CRT data-path to get changed if the
SM501 experiences a reset over suspend.
Also move some of the debug messages to dev_dbg() level and ensure
that the suspend code does not try and restore anything it did not
manage to save.
Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:36 +0000 (01:28 -0700)]
pm2fb: Permedia 2V initialization fixes
This patch:
- initializes correctly the Permedia2V chip if it is not initialized by BIOS
- puts back clock frequency for the ELSA WINNER board to 100kHz
- fixes returned error values from setcolreg() function
- uses more general classes for PCI ids
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:34 +0000 (01:28 -0700)]
pm2fb: source code improvements
This patch concentrates on source compacting, simplification and more
conformance to kernel coding standards.
The major changes:
- RD32() and WR() functions are merged into pm2_RD() and pm2_WR()
- conditional (with switch()) RDAC functions are separated in two
unconditional ones
- the conditional pm2fb_block_op() function is merged into pm2fb_fillrect()
and pm2fb_copyarea()
- WAIT_FIFO() values are corrected
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:32 +0000 (01:28 -0700)]
pm3fb: improvements and cleanups
This patch contains improvements:
- it adds ROP_XOR in pm3fb_fillrect()
- it conforms closer to coding style
- it removes redundant parentheses and setting bits with 0 value
- it checks if hardware acceleration is disabled in pm3fb_imageblit
- it adds module description
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:32 +0000 (01:28 -0700)]
pm3fb: 3 small fixes
This patch contains 3 small improvements:
- it corrects scan line width calculation in pm3fb_imageblit()
- it corrects mmio mapping for big endian machines
- it enables panning acceleration constants
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Tue, 16 Oct 2007 08:28:31 +0000 (01:28 -0700)]
pm3fb: header file reduction
This patch removes constants named AAA_DISABLE with value 0. They are redudant
and misleading ( a |= AAA_DISABLE does nothing and usually should be
a &= ~AAA_ENABLE).
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
uvesafb is an enhanced version of vesafb. It uses a userspace helper (v86d)
to execute calls to the x86 Video BIOS functions. The driver is not limited
to any specific arch and whether it works on a given arch or not depends on
that arch being supported by the userspace daemon. It has been tested on
x86_32 and x86_64.
A single BIOS call is represented by an instance of the uvesafb_ktask
structure. This structure contains a buffer, a completion struct and a
uvesafb_task substructure, containing the values of the x86 registers, a flags
field and a field indicating the length of the buffer. Whenever a BIOS call
is made in the driver, uvesafb_exec() builds a message using the uvesafb_task
substructure and the contents of the buffer. This message is then assigned a
random ack number and sent to the userspace daemon using the connector
interface.
The message's sequence number is used as an index for the uvfb_tasks array,
which provides a mapping from the messages coming from userspace to the
in-kernel uvesafb_ktask structs.
The userspace daemon performs the requested operation and sends a reply in the
form of a uvesafb_task struct and, optionally, a buffer. The seq and ack
numbers in the reply should be exactly the same as those in the request.
Each message from userspace is processed by uvesafb_cn_callback() and after
passing a few sanity checks leads to the completion of a BIOS call request.
Signed-off-by: Michal Januszewski <spock@gentoo.org> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Paulo Marques <pmarques@grupopie.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bryan Kadzban [Tue, 16 Oct 2007 08:28:23 +0000 (01:28 -0700)]
rtc: allow validated RTC_PIE_ON for non-root
drivers/char/rtc.c allowed RTC_PIE_ON ioctls for non-root users, as long as
the current interval (set via RTC_IRQP_SET) is <= max_user_freq. Allow
RTC_PIE_ON under the same conditions when /dev/rtc* is handled by the rtc
subsystem.
Signed-off-by: Bryan Kadzban <bryan@kdzbn.homelinux.net> Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bryan Kadzban [Tue, 16 Oct 2007 08:28:22 +0000 (01:28 -0700)]
rtc: add max_user_freq to sysfs
drivers/char/rtc.c exposed a sysctl to change the maximum frequency at
which a non-root user could ask the RTC to generate interrupts (via the
RTC_IRQP_SET ioctl). This value is no longer available under the new RTC
subsystem, so add it to sysfs for each RTC device.
Works for me on x86_64 (both reads and writes), using rtc-cmos.
Signed-off-by: Bryan Kadzban <bryan@kdzbn.homelinux.net> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mark Lord [Tue, 16 Oct 2007 08:28:21 +0000 (01:28 -0700)]
rtc: fix readback from /sys/class/rtc/rtc?/wakealarm
Fix readback of RTC alarms on platforms which return -1 in
non-hardware-supported RTC alarm fields.
To fill in the missing (-1) values, we grab an RTC timestamp along with the
RTC alarm value, and use the timestamp fields to populate the missing alarm
fields.
To counter field-wrap races (since the timestamp and alarm are not read
together atomically), we read the RTC timestamp both before and after
reading the RTC alarm value, and then check for wrapped fields --> if any
have wrapped, we know we have a possible inconsistency, so we loop and
reread the timestamp and alarm again.
Wrapped fields in the RTC timestamps are an issue because rtc-cmos.c, for
example, also gets/uses an RTC timestamp internally while fetching the RTC
alarm. If our timestamp here wasn't the same (minutes and higher) as what
was used internally there, then we might end up populating the -1 fields
with inconsistent values.
This fixes readbacks from /sys/class/rtc/rtc?/wakealarm, as well as other
code paths which call rtc_read_alarm().
Signed-off-by: Mark Lord <mlord@pobox.com> Cc: David Brownell <david-b@pacbell.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jean Delvare [Tue, 16 Oct 2007 08:28:18 +0000 (01:28 -0700)]
rtc-pcf8583: Check for i2c adapter functionality
Not all i2c adapters support I2C-level messaging. Check that the adapter
does before probing for a PCF8583 chip, as the driver makes use of
i2c_transfer and i2c_master_send.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Atsushi Nemoto [Tue, 16 Oct 2007 08:28:18 +0000 (01:28 -0700)]
rtc: make rtc-ds1742 driver hotplug-aware
The rtc-ds1742 platform driver name doesn't match its module name,
which might prevents it from properly hotplugging. There is only two
in-tree user of its driver, which are fixed by this patch too.
Mark Zhan [Tue, 16 Oct 2007 08:28:17 +0000 (01:28 -0700)]
rtc-dev: no need to convert file->private_data to rtc device
In rtc-dev.c, when a rtc device is opened, file->private_data is already
attached with the rtc device pointer, so there is no need to call
to_rtc_device() to convert file->private_data to a rtc device pointer.
Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Mark Zhan <rongkai.zhan@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Brownell [Tue, 16 Oct 2007 08:28:16 +0000 (01:28 -0700)]
rtc_irq_set_freq() requires power-of-two and associated kerneldoc
RTC periodic IRQs are only defined to work for 2^N Hz values. This patch
moves that validity check into the infrastructure, so drivers don't need to
check it; and adds kerneldoc for the two interface functions related to
periodic IRQs. (One of which was quite mysterious until its first use was
recently checked in!)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:14 +0000 (01:28 -0700)]
ecryptfs: clean up page flag handling
The functions that eventually call down to ecryptfs_read_lower(),
ecryptfs_decrypt_page(), and ecryptfs_copy_up_encrypted_with_header()
should have the responsibility of managing the page Uptodate
status. This patch gets rid of some of the ugliness that resulted from
trying to push some of the page flag setting too far down the stack.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:11 +0000 (01:28 -0700)]
eCryptfs: convert mmap functions to use persistent file
Convert readpage, prepare_write, and commit_write to use read_write.c
routines. Remove sync_page; I cannot think of a good reason for implementing
that in eCryptfs.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:10 +0000 (01:28 -0700)]
eCryptfs: make open, truncate, and setattr use persistent file
Rather than open a new lower file for every eCryptfs file that is opened,
truncated, or setattr'd, instead use the existing lower persistent file for
the eCryptfs inode. Change truncate to use read_write.c functions. Change
ecryptfs_getxattr() to use the common ecryptfs_getxattr_lower() function.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:10 +0000 (01:28 -0700)]
eCryptfs: update metadata read/write functions
Update the metadata read/write functions and grow_file() to use the
read_write.c routines. Do not open another lower file; use the persistent
lower file instead. Provide a separate function for
crypto.c::ecryptfs_read_xattr_region() to get to the lower xattr without
having to go through the eCryptfs getxattr.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:07 +0000 (01:28 -0700)]
eCryptfs: read_write.c routines
Add a set of functions through which all I/O to lower files is consolidated.
This patch adds a new inode_info reference to a persistent lower file for each
eCryptfs inode; another patch later in this series will set that up. This
persistent lower file is what the read_write.c functions use to call
vfs_read() and vfs_write() on the lower filesystem, so even when reads and
writes come in through aops->readpage and aops->writepage, we can satisfy them
without resorting to direct access to the lower inode's address space.
Several function declarations are going to be changing with this patchset.
For now, in order to keep from breaking the build, I am putting dummy
parameters in for those functions.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:07 +0000 (01:28 -0700)]
ecryptfs: fix error handling
The error paths and the module exit code need work. sysfs
unregistration is not the right place to tear down the crypto
subsystem, and the code to undo subsystem initializations on various
error paths is unnecessarily duplicated. This patch addresses those
issues.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:05 +0000 (01:28 -0700)]
eCryptfs: remove header_extent_size
There is no point to keeping a separate header_extent_size and an extent_size.
The total size of the header can always be represented as some multiple of
the regular data extent size.
[randy.dunlap@oracle.com: ecryptfs: fix printk format warning] Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:04 +0000 (01:28 -0700)]
eCryptfs: Use generic_file_splice_read()
eCryptfs is currently just passing through splice reads to the lower
filesystem. This is obviously incorrect behavior; the decrypted data is
what needs to be read, not the lower encrypted data. I cannot think of any
good reason for eCryptfs to implement splice_read, so this patch points the
eCryptfs fops splice_read to use generic_file_splice_read.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Reviewed-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton wrote:
> > struct mutex *tfm_mutex = NULL;
>
> This initialisation looks like it's here to kill bogus gcc warning
> (if it is, it should have been commented). Please investigate
> uninitialized_var() and __maybe_unused sometime.
Remove some unnecessary variable initializations. There may be a few
more such intializations remaining in the code base; a future patch
will take care of those.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:02 +0000 (01:28 -0700)]
eCryptfs: kerneldoc fixes for crypto.c and keystore.c
Andrew Morton wrote:
From: mhalcrow@us.ibm.com <mhalcrow@halcrow.austin.ibm.com>
> > +/**
> > + * decrypt_passphrase_encrypted_session_key - Decrypt the session key
> > + * with the given auth_tok.
> > *
> > * Returns Zero on success; non-zero error otherwise.
> > */
>
> That comment purports to be a kerneldoc-style comment. But
>
> - kerneldoc doesn't support multiple lines on the introductory line
> which identifies the name of the function (alas). So you'll need to
> overflow 80 cols here.
>
> - the function args weren't documented
>
> But the return value is! People regularly forget to do that. And
> they frequently forget to document the locking prerequisites and the
> permissible calling contexts (process/might_sleep/hardirq, etc)
>
> (please check all ecryptfs kerneldoc for this stuff sometime)
This patch cleans up some of the existing comments and makes a couple
of line break tweaks. There is more work to do to bring eCryptfs into
full kerneldoc-compliance.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:00 +0000 (01:28 -0700)]
eCryptfs: collapse flag set into one statement
Andrew Morton wrote:
> > + crypt_stat->flags |= ECRYPTFS_ENCRYPTED;
> > + crypt_stat->flags |= ECRYPTFS_KEY_VALID;
>
> Maybe the compiler can optimise those two statements, but we'd
> normally provide it with some manual help.
This patch provides the compiler with some manual help for
optimizing the setting of some flags.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:28:00 +0000 (01:28 -0700)]
eCryptfs: remove unnecessary BUG_ON
Andrew Morton wrote:
> > + mutex_lock(&mount_crypt_stat->global_auth_tok_list_mutex);
> > + BUG_ON(mount_crypt_stat->num_global_auth_toks == 0);
> > + mutex_unlock(&mount_crypt_stat->global_auth_tok_list_mutex);
>
> That's odd-looking. If it was a bug for num_global_auth_toks to be
> zero, and if that mutex protects num_global_auth_toks then as soon
> as the lock gets dropped, another thread can make
> num_global_auth_toks zero, hence the bug is present. Perhaps?
That was serving as an internal sanity check that should not have made
it into the final patch set in the first place. This patch removes it.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Tue, 16 Oct 2007 08:27:59 +0000 (01:27 -0700)]
ecryptfs: printk warning fixes
fs/ecryptfs/keystore.c: In function 'parse_tag_1_packet':
fs/ecryptfs/keystore.c:557: warning: format '%d' expects type 'int', but argument 2 has type 'size_t'
fs/ecryptfs/keystore.c: In function 'parse_tag_3_packet':
fs/ecryptfs/keystore.c:690: warning: format '%d' expects type 'int', but argument 2 has type 'size_t'
fs/ecryptfs/keystore.c: In function 'parse_tag_11_packet':
fs/ecryptfs/keystore.c:836: warning: format '%d' expects type 'int', but argument 2 has type 'size_t'
fs/ecryptfs/keystore.c: In function 'write_tag_1_packet':
fs/ecryptfs/keystore.c:1413: warning: format '%d' expects type 'int', but argument 2 has type 'size_t'
fs/ecryptfs/keystore.c:1413: warning: format '%d' expects type 'int', but argument 3 has type 'long unsigned int'
fs/ecryptfs/keystore.c: In function 'write_tag_11_packet':
fs/ecryptfs/keystore.c:1472: warning: format '%d' expects type 'int', but argument 2 has type 'size_t'
fs/ecryptfs/keystore.c: In function 'write_tag_3_packet':
fs/ecryptfs/keystore.c:1663: warning: format '%d' expects type 'int', but argument 2 has type 'size_t'
fs/ecryptfs/keystore.c:1663: warning: format '%d' expects type 'int', but argument 3 has type 'long unsigned int'
fs/ecryptfs/keystore.c: In function 'ecryptfs_generate_key_packet_set':
fs/ecryptfs/keystore.c:1778: warning: passing argument 2 of 'write_tag_11_packet' from incompatible pointer type
fs/ecryptfs/main.c: In function 'ecryptfs_parse_options':
fs/ecryptfs/main.c:363: warning: format '%d' expects type 'int', but argument 3 has type 'size_t'
Cc: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:27:58 +0000 (01:27 -0700)]
eCryptfs: fix Tag 11 writing code
Fix up the Tag 11 writing code to handle size limits and boundaries more
explicitly. It looks like the packet length was 1 shorter than it should have
been, chopping off the last byte of the key identifier. This is largely
inconsequential, since it is not much more likely that a key identifier
collision will occur with 7 bytes rather than 8. This patch fixes the packet
to use the full number of bytes that were originally intended to be used for
the key identifier.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:27:57 +0000 (01:27 -0700)]
eCryptfs: fix Tag 11 parsing code
Fix up the Tag 11 parsing code to handle size limits and boundaries more
explicitly. Pay attention to *8* bytes for the key identifier (literal data),
no more, no less.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:27:55 +0000 (01:27 -0700)]
eCryptfs: kmem_cache objects for multiple keys; init/exit functions
Introduce kmem_cache objects for handling multiple keys per inode. Add calls
in the module init and exit code to call the key list
initialization/destruction functions.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Halcrow [Tue, 16 Oct 2007 08:27:53 +0000 (01:27 -0700)]
eCryptfs: add key list structure; search keyring
Add support structures for handling multiple keys. The list in crypt_stat
contains the key identifiers for all of the keys that should be used for
encrypting each file's File Encryption Key (FEK). For now, each inode
inherits this list from the mount-wide crypt_stat struct, via the
ecryptfs_copy_mount_wide_sigs_to_inode_sigs() function.
This patch also removes the global key tfm from the mount-wide crypt_stat
struct, instead keeping a list of tfm's meant for dealing with the various
inode FEK's. eCryptfs will now search the user's keyring for FEK's parsed
from the existing file metadata, so the user can make keys available at any
time before or after mounting.
Now that multiple FEK packets can be written to the file metadata, we need to
be more meticulous about size limits. The updates to the code for writing out
packets to the file metadata makes sizes and limits more explicit, uniformly
expressed, and (hopefully) easier to follow.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Adrian Bunk [Tue, 16 Oct 2007 08:27:52 +0000 (01:27 -0700)]
fs/nfsd/export.c: make 3 functions static
This patch makes the following needlessly global functions static:
- exp_get_by_name()
- exp_parent()
- exp_find()
Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Neil Brown <neilb@suse.de> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jesper Juhl [Tue, 16 Oct 2007 08:27:52 +0000 (01:27 -0700)]
isdn: guard against a potential NULL pointer dereference in old_capi_manufacturer()
In drivers/isdn/capi/kcapi.c::old_capi_manufacturer(), if the call to
get_capi_ctr_by_nr(ldef.contr); in line 823 returns NULL, then we'll be
dereferencing a NULL pointer in the very next line.
Jesper Juhl [Tue, 16 Oct 2007 08:27:51 +0000 (01:27 -0700)]
fix possible NULL deref on low memory condition in capidrv.c::send_message()
If we fail to allocate an skb in
drivers/isdn/capi/capidrv.c::send_message(), then we'll end up
dereferencing a NULL pointer.
Since out of memory conditions are not unheard of, I believe it
is better to print a error message and just return rather than
bring down the whole kernel.
Sure, doing this may upset some application, but that's still
better than crashing the whole system.
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