Граф коммитов

30303 Коммитов

Автор SHA1 Сообщение Дата
Adrian Bunk c72755b3bd [PATCH] fbdev: Remove unused exports
This patch removes the following unused EXPORT_SYMBOL's:
- fbcvt.c: fb_find_mode_cvt
- fbmem.c: fb_con_duit
- fbmem.c: fb_new_modelist
- macmodes.c: mac_var_to_vmode
- modedb.c: fb_delete_videomode
- modedb.c: fb_destroy_modelist

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:31 -07:00
Antonino A. Daplas 17cc6281c1 [PATCH] fbdev: Coverity Bug 90
It's a false positive, but let's suppress it anyway.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:31 -07:00
Antonino A. Daplas 8126a044f9 [PATCH] fbdev: Coverity Bug 85
It's a false positive, but let's suppress it anyway.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
Antonino A. Daplas 0fa67f84f4 [PATCH] atyfb: Fix dead code
Coverity Bug 68:

Fix dead code

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
David Hollister 4ee1acce49 [PATCH] vt: Delay the update of the visible console
Delay the update of the visible framebuffer console until all other consoles
have been initialized in order to avoid losing information.  This only seems
to be a problem with modules, not with built-in drivers.

Signed-off-by: David Hollister <david.hollister@amd.com>
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
Antonino A. Daplas 6dbde380ca [PATCH] vesafb: Prefer VGA registers over PMI
- As per VESA specs, use the VGA registers to set the palette if the mode is
  VGA compatible.  Otherwise, use the protected mode interface.

- Make pmi_setpal default to 1

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
Antonino A. Daplas 313ca22f0b [PATCH] vesafb: Fix return code of vesafb_setcolreg
If the hardware palette cannot be accessed, make vesafb_setcolreg return a
nonzero value.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
Dennis Munsie f71689e413 [PATCH] fbdev: Add 1366x768 (WXGA) mode to mode database
Adds 1366x768 @ 60Hz to drivers/video/modedb.c.

Signed-off-by: Dennis Munsie <dmunsie@cecropia.com>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
Antonino A. Daplas fe610671d7 [PATCH] nvidiafb: Add support for Geforce 6100 and related chipsets
Add support for Geforce 6100 and related chipsets (PCI device id 0x024x)

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
Antonino A. Daplas ba70710e59 [PATCH] fbdev: Firmware EDID fixes
- make firmware edid independent from framebuffer (No need to choose
  framebuffer just to disable this option

- enable this option in X86_64

- check if VBE/DDC function is implemented before calling actual function

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
Antonino A. Daplas 026fbe16c2 [PATCH] savagefb: Whitespace cleanup
Whitespace cleanup

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:30 -07:00
Antonino A. Daplas 0c683dbfc0 [PATCH] fbdev: Static pseudocolor with depth less than 4 does exist
A static pseudocolor visual with depth less than 4 does exist, so let's not
accidentally upscale the depth with this configuration

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas ae6d321876 [PATCH] vga16fb: Update platform code
Update platform code to dynamically allocate the platform device

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas 20cecf6a6a [PATCH] vfb: Update platform code
Update platform code to dynamically allocate the platform device

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas 103edf024b [PATCH] vesafb: Update platform code
Update platform code to dynamically allocate the platform device

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas 673681c1b5 [PATCH] epson1355fb: Update platform code
Update platform code to dynamically allocate the platform device

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas 7914cb27ee [PATCH] atyfb: Set correct acceleration flags
Set the appropriate acceleration flags so fbcon can choose the optimal
scrolling mode.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas 58221097a8 [PATCH] atyfb: Remove unneeded calls to wait_for_idle
The drawing functions of atyfb is unecessary syncing the GPU which is
affecting performance.  Remove the calls, any direct access by fbcon to the
framebuffer will always be preceeded by a call to atyfb_sync().

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas 72c24cc51a [PATCH] atyfb: Fix hardware cursor handling
Fix image and color handling in atyfb_cursor()

- In the 2-bit scheme of the cursor image, just set the first bit to be
  always zero (turn off transparency and/or XOR), and just do the masking
  manually

- The cursor color is converted into 32-bit RGBA8888 using struct fb_cmap.
  Each component in the cmap is u16 in size, so mask the upper 8 bits.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas 8eec498108 [PATCH] nvidiafb: Revise pci_device_id table
nVidia is churning out chipsets like there's no tomorrow.  And even though the
pci_device_id table now has numerous entries, it is still not guaranteed that
all supported devices are included or will be included.

Fortunately, nvidiafb has chipset detection logic built in.  So, change the
contents of the pci_device_id table so it will capture all nVidia devices of
the display class.  Unsupported chipsets will then be filtered out by
nvidiafb's detection logic.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Antonino A. Daplas 3007683144 [PATCH] fbdev: More accurate sync range extrapolation
The EDID block should specify the display's operating limits (vertical and
horizontal sync ranges, and maximum dot clock).  If not given by the EDID
block, the ranges are extrapolated from the modelist.  However, the
computation used is only a rough approximation, and the resulting values may
not reflect the actual capability of the display.  This problem is frequently
encountered when the EDID block has a single entry, the single mode entry will
fail validation.

To prevent this, calculate the values based on the same method used in
fb_validate_mode().

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:29 -07:00
Adrian Bunk 22f4a00fd5 [PATCH] fbdev: Remove duplicate #include's
Remove unneeded duplicate #include's of the same header file.

In the case of fbmon.c linux/pci.h is now #include'd unconditional, but
this should be safe.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Adrian Bunk 31c5cdba69 [PATCH] fbdev: cleanup the CONFIG_VIDEO_SELECT mess
We had three (sic) VIDEO_SELECT options:
- two in drivers/video/Kconfig
- one in drivers/video/console/Kconfig

This patch removes the two options in drivers/video/Kconfig and also removes
the unneeded usage in drivers/video/sis/sis_main.c .

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Richard Purdie e442378185 [PATCH] backlight: LOCOMO Backlight Driver updates
Add backlight intensity control to the LOCOMO lcd/backlight driver using the
backlight class and add basic power management support.

This is a reimplementation and improvement of patches by John Lenz and Pavel
Machek

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Antonino A. Daplas f8020dc560 [PATCH] savagefb: Add state save and_restore hooks
Reported by: Rich (Bugzilla Bug 6417)

"if savage driver is used in x.org together with savagefb, it results in
seriously garbled and distorted screen - coupled with severe slowdowns."

This bug is the result of Xorg unable to handle savagefb altering the
hardware which results in X failing to start properly and/or failed console
switching.

Add savagefb_state_save and savagefb_state_restore. These hooks will only
save and restore the extended VGA registers.  Standard VGA registers will be
left alone.  This is enough to make savagefb play nicely with the latest
Xorg savage driver, and perhaps with savage DRI. (Transient screen artifacts
may appear before X loads and during console switches).

(Unfortunately, blanking the screen also leaves Xorg in a blanked state, so I
have to unblank the screen before Xorg loads.  So I doubt if the transient
screen artifacts will be completely invisible but hopefully it will only be
for a shorter duration (not much).)

[akpm@osdl.org: cleanups]
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Cc: <rich@hq.vsaa.lv>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Antonino A. Daplas 2356614b08 [PATCH] savagefb: Allocate space for current and saved register states
Allocate space for 2 register states: 'current' for the current state of
the hardware, and 'saved', to be used for restoring the hardware to a sane
state.  This is in preparation for the addition of state save and restore
hooks to make savagefb work together with the latest Xorg savage driver.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Tobias Oed 1ba70a0195 [PATCH] Remove code that has long been commented out from pdc20265_old
Signed-off-by: Tobias Oed <tobiasoed@hotmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Tobias Oed fb4ece268b [PATCH] pdc202xx_old depends on CONFIG_BLK_DEV_IDEDMA
The driver pdc202xx_old requires CONFIG_BLK_DEV_IDEDMA, so it's always
defined

Signed-off-by: Tobias Oed <tobiasoed@hotmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Ingo Molnar 3d1c1cc962 [PATCH] fix IDE deadlock in error reporting code
Michal Piotrowski reported the following validator assert:

 hdd: set_drive_speed_status: status=0x51 { DriveReady SeekComplete Error }
 hdd: set_drive_speed_status: error=0xb4 { AbortedCommand LastFailedSense=0x0b }

 ============================
 [ BUG: illegal lock usage! ]
 ----------------------------
 illegal {in-hardirq-W} -> {hardirq-on-W} usage.
 hdparm/1821 [HC0[0]:SC0[0]:HE1:SE1] takes:
  (ide_lock){++..}, at: [<c0268388>] ide_dump_opcode+0x13/0x9b

 [...]

 stack backtrace:
  [<c0104513>] show_trace+0x1b/0x20
  [<c01045f1>] dump_stack+0x1f/0x24
  [<c013976c>] print_usage_bug+0x1a5/0x1b1
  [<c0139e90>] mark_lock+0x2ca/0x4f7
  [<c013aa96>] __lockdep_acquire+0x47e/0xaa4
  [<c013b536>] lockdep_acquire+0x67/0x7f
  [<c030552d>] _spin_lock+0x24/0x32
  [<c0268388>] ide_dump_opcode+0x13/0x9b
  [<c02688b6>] ide_dump_status+0x4a6/0x4cc
  [<c0267ae6>] ide_config_drive_speed+0x32a/0x33a
  [<c0262dc5>] piix_tune_chipset+0x2ed/0x2f8
  [<c0262e31>] piix_config_drive_xfer_rate+0x61/0xb5
  [<c0263a82>] set_using_dma+0x2f/0x60
  [<c0263bee>] ide_write_setting+0x4a/0xc3
  [<c02647ca>] generic_ide_ioctl+0x8a/0x47f
  [<f886003a>] idecd_ioctl+0xfd/0x133 [ide_cd]
  [<c01f1fff>] blkdev_driver_ioctl+0x4b/0x5f
  [<c01f2783>] blkdev_ioctl+0x770/0x7bd
  [<c017dc0d>] block_ioctl+0x1f/0x21
  [<c0189353>] do_ioctl+0x27/0x6e
  [<c0189604>] vfs_ioctl+0x26a/0x280
  [<c0189667>] sys_ioctl+0x4d/0x7e
  [<c0305ed2>] sysenter_past_esp+0x63/0xa1

in ide_dump_opcode() takes the ide_lock in an irq-unsafe manner, i.e.  this
function expects to be called with irqs disabled.  But
ide_dump_ata[pi]_status() doesnt do that - it enables interrupts specifically.
 That is a no-no - what guarantees that another IDE port couldnt generate an
IDE interrupt while we are dumping this error?  The fix is to turn the
irq-enabling in these functions into irq-disabling.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Sergei Shtylyov 8b6ebe016b [PATCH] ide: pdc202xx_old: remove the obsolete busproc
Remove the busproc from pdc202xx_old.c because:

- it handles the obsolete HDIO_TRISTATE_HWIF ioctl instead of the modern
  HDIO_SET_BUSSTATE, so treats its argument wrong;

- I don't think that tristating both channels is good idea (probably can't
  be done otherwise since there seems to be only single bit controlling this).

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:28 -07:00
Sergei Shtylyov 17c1033d33 [PATCH] ide: actually honor drive's minimum PIO/DMA cycle times
The function ide_timing_compute() fails to *actually* take drive's
specified minimum PIO/DMA cycle times into account -- when doing this, it
calls ide_timing_merge() on the 'struct ide_timing' argument which contains
garbage at the moment, and then ultimately destroys the read cycle time by
quantizing the ide_timing[] entry, instead of copying from that entry to
the argument structure, and only then doing a merge/quantize.

Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Al Boldi 178184b609 [PATCH] ide-io: increase timeout value to allow for slave wakeup
During an STR resume cycle, the ide master disk times-out when there is
also a slave present (especially CD).  Increasing the timeout in ide-io
from 10,000 to 100,000 fixes this problem.

Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Alan Cox 4fb0f76d8c [PATCH] Fix IDE locking error
This bit us a few kernels ago, and for some reason never made it's way
upstream.

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=144743
Kernel panic - not syncing: drivers/ide/pci/piix.c:231:
spin_lock(drivers/ide/ide.c:c03cef28) already locked by driver/ide/ide-iops.c/1153.

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Dave Jones <davej@redhat.com>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Tobias Oed b5cdccf841 [PATCH] ide: pdc202xx_old.c: remove unneeded tuneproc() call
Remove a call to hwif->tuneproc() on the error path of
config_chipset_for_dma(), as its single caller
(pdc202xx_config_drive_xfer_rate()) will do the call in that case.

Signed-off-by: Tobias Oed <tobiasoed@hotmail.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Oleg Nesterov cf2dfbfbf4 [PATCH] coredump: copy_process: don't check SIGNAL_GROUP_EXIT
After the previous patch SIGNAL_GROUP_EXIT implies a pending SIGKILL, we
can remove this check from copy_process() because we already checked
!signal_pending().

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Oleg Nesterov 5debfa6da5 [PATCH] coredump: shutdown current process first
This patch optimizes zap_threads() for the case when there are no ->mm
users except the current's thread group.  In that case we can avoid
'for_each_process()' loop.

It also adds a useful invariant: SIGNAL_GROUP_EXIT (if checked under
->siglock) always implies that all threads (except may be current) have
pending SIGKILL.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Oleg Nesterov dcf560c593 [PATCH] coredump: some code relocations
This is a preparation for the next patch.  No functional changes.
Basically, this patch moves '->flags & SIGNAL_GROUP_EXIT' check into
zap_threads(), and 'complete(vfork_done)' into coredump_wait outside of
->mmap_sem protected area.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Oleg Nesterov 7b1c6154fa [PATCH] coredump: don't take tasklist_lock
This patch removes tasklist_lock from zap_threads().
This is safe wrt:

	do_exit:
		The caller holds mm->mmap_sem. This means that task which
		shares the same ->mm can't pass exit_mm(), so it can't be
		unhashed from init_task.tasks or ->thread_group lists.

	fork:
		None of sub-threads can fork after zap_process(leader). All
		processes which were created before this point should be
		visible to zap_threads() because copy_process() adds the new
		process to the tail of init_task.tasks list, and ->siglock
		lock/unlock provides a memory barrier.

	de_thread:
		It does list_replace_rcu(&leader->tasks, &current->tasks).
		So zap_threads() will see either old or new leader, it does
		not matter. However, it can change p->sighand, so we should
		use lock_task_sighand() in zap_process().

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Oleg Nesterov d5f70c00ad [PATCH] coredump: kill ptrace related stuff
With this patch zap_process() sets SIGNAL_GROUP_EXIT while sending SIGKILL to
the thread group.  This means that a TASK_TRACED task

	1. Will be awakened by signal_wake_up(1)

	2. Can't sleep again via ptrace_notify()

	3. Can't go to do_signal_stop() after return
	   from ptrace_stop() in get_signal_to_deliver()

So we can remove all ptrace related stuff from coredump path.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Oleg Nesterov 281de339ce [PATCH] coredump: speedup SIGKILL sending
With this patch a thread group is killed atomically under ->siglock.  This is
faster because we can use sigaddset() instead of force_sig_info() and this is
used in further patches.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:27 -07:00
Oleg Nesterov aceecc0412 [PATCH] coredump: optimize ->mm users traversal
zap_threads() iterates over all threads to find those ones which share
current->mm.  All threads in the thread group share the same ->mm, so we can
skip entire thread group if it has another ->mm.

This patch shifts the killing of thread group into the newly added
zap_process() function.  This looks as unnecessary complication, but it is
used in further patches.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Oleg Nesterov 2ceb8693ef [PATCH] de_thread: fix lockless do_each_thread
We should keep the value of old_leader->tasks.next in de_thread, otherwise
we can't do for_each_process/do_each_thread without tasklist_lock held.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Eric Paris 42c3e03ef6 [PATCH] SELinux: Add sockcreate node to procattr API
Below is a patch to add a new /proc/self/attr/sockcreate A process may write a
context into this interface and all subsequent sockets created will be labeled
with that context.  This is the same idea as the fscreate interface where a
process can specify the label of a file about to be created.  At this time one
envisioned user of this will be xinetd.  It will be able to better label
sockets for the actual services.  At this time all sockets take the label of
the creating process, so all xinitd sockets would just be labeled the same.

I tested this by creating a tcp sender and listener.  The sender was able to
write to this new proc file and then create sockets with the specified label.
I am able to be sure the new label was used since the avc denial messages
kicked out by the kernel included both the new security permission
setsockcreate and all the socket denials were for the new label, not the label
of the running process.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Oleg Nesterov c1df7fb88a [PATCH] cleanup next_tid()
Try to make next_tid() a bit more readable and deletes unnecessary
"pid_alive(pos)" check.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Oleg Nesterov a872ff0cb2 [PATCH] simplify/fix first_tid()
first_tid:

	/* If nr exceeds the number of threads there is nothing todo */
	if (nr) {
		if (nr >= get_nr_threads(leader))
			goto done;
	}

This is not reliable: sub-threads can exit after this check, so the
'for' loop below can overlap and proc_task_readdir() can return an
already filldir'ed dirents.

	for (; pos && pid_alive(pos); pos = next_thread(pos)) {
		if (--nr > 0)
			continue;

Off-by-one error, will return 'leader' when nr == 1.

This patch tries to fix these problems and simplify the code.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Eric W. Biederman cc288738c9 [PATCH] proc: Remove tasklist_lock from proc_task_readdir.
This is just like my previous removal of tasklist_lock from first_tgid, and
next_tgid.  It simply had to wait until it was rcu safe to walk the thread
list.

This should be the last instance of the tasklist_lock in proc.  So user
processes should not be able to influence the tasklist lock hold times.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Eric W. Biederman df26c40e56 [PATCH] proc: Cleanup proc_fd_access_allowed
In process of getting proc_fd_access_allowed to work it has developed a few
warts.  In particular the special case that always allows introspection and
the special case to allow inspection of kernel threads.

The special case for introspection is needed for /proc/self/mem.

The special case for kernel threads really should be overridable
by security modules.

So consolidate these checks into ptrace.c:may_attach().

The check to always allow introspection is trivial.

The check to allow access to kernel threads, and zombies is a little
trickier.  mem_read and mem_write already verify an mm exists so it isn't
needed twice.  proc_fd_access_allowed only doesn't want a check to verify
task->mm exits, s it prevents all access to kernel threads.  So just move
the task->mm check into ptrace_attach where it is needed for practical
reasons.

I did a quick audit and none of the security modules in the kernel seem to
care if they are passed a task without an mm into security_ptrace.  So the
above move should be safe and it allows security modules to come up with
more restrictive policy.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Eric W. Biederman 778c114477 [PATCH] proc: Use sane permission checks on the /proc/<pid>/fd/ symlinks
Since 2.2 we have been doing a chroot check to see if it is appropriate to
return a read or follow one of these magic symlinks.  The chroot check was
asking a question about the visibility of files to the calling process and
it was actually checking the destination process, and not the files
themselves.  That test was clearly bogus.

In my first pass through I simply fixed the test to check the visibility of
the files themselves.  That naive approach to fixing the permissions was
too strict and resulted in cases where a task could not even see all of
it's file descriptors.

What has disturbed me about relaxing this check is that file descriptors
are per-process private things, and they are occasionaly used a user space
capability tokens.  Looking a little farther into the symlink path on /proc
I did find userid checks and a check for capability (CAP_DAC_OVERRIDE) so
there were permissions checking this.

But I was still concerned about privacy.  Besides /proc there is only one
other way to find out this kind of information, and that is ptrace.  ptrace
has been around for a long time and it has a well established security
model.

So after thinking about it I finally realized that the permission checks
that make sense are the permission checks applied to ptrace_attach.  The
checks are simple per process, and won't cause nasty surprises for people
coming from less capable unices.

Unfortunately there is one case that the current ptrace_attach test does
not cover: Zombies and kernel threads.  Single stepping those kinds of
processes is impossible.  Being able to see which file descriptors are open
on these tasks is important to lsof, fuser and friends.  So for these
special processes I made the rule you can't find out unless you have
CAP_SYS_PTRACE.

These proc permission checks should now conform to the principle of least
surprise.  As well as using much less code to implement :)

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Eric W. Biederman 5b0c1dd38b [PATCH] proc: optimize proc_check_dentry_visible
The code doesn't need to sleep to when making this check so I can just do the
comparison and not worry about the reference counts.

TODO: While looking at this I realized that my original cleanup did not push
the permission check far enough down into the stack.  The call of
proc_check_dentry_visible needs to move out of the generic proc
readlink/follow link code and into the individual get_link instances.
Otherwise the shared resources checks are not quite correct (shared
files_struct does not require a shared fs_struct), and there are races with
unshare.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00
Eric W. Biederman 13b41b0949 [PATCH] proc: Use struct pid not struct task_ref
Incrementally update my proc-dont-lock-task_structs-indefinitely patches so
that they work with struct pid instead of struct task_ref.

Mostly this is a straight 1-1 substitution.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:26 -07:00