Paul Moore [Tue, 29 Jan 2008 13:43:36 +0000 (08:43 -0500)]
SELinux: Enable dynamic enable/disable of the network access checks
This patch introduces a mechanism for checking when labeled IPsec or SECMARK
are in use by keeping introducing a configuration reference counter for each
subsystem. In the case of labeled IPsec, whenever a labeled SA or SPD entry
is created the labeled IPsec/XFRM reference count is increased and when the
entry is removed it is decreased. In the case of SECMARK, when a SECMARK
target is created the reference count is increased and later decreased when the
target is removed. These reference counters allow SELinux to quickly determine
if either of these subsystems are enabled.
NetLabel already has a similar mechanism which provides the netlbl_enabled()
function.
This patch also renames the selinux_relabel_packet_permission() function to
selinux_secmark_relabel_packet_permission() as the original name and
description were misleading in that they referenced a single packet label which
is not the case.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:38:23 +0000 (08:38 -0500)]
SELinux: Better integration between peer labeling subsystems
Rework the handling of network peer labels so that the different peer labeling
subsystems work better together. This includes moving both subsystems to a
single "peer" object class which involves not only changes to the permission
checks but an improved method of consolidating multiple packet peer labels.
As part of this work the inbound packet permission check code has been heavily
modified to handle both the old and new behavior in as sane a fashion as
possible.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:38:21 +0000 (08:38 -0500)]
SELinux: Add a new peer class and permissions to the Flask definitions
Add additional Flask definitions to support the new "peer" object class and
additional permissions to the netif, node, and packet object classes. Also,
bring the kernel Flask definitions up to date with the Fedora SELinux policies
by adding the "flow_in" and "flow_out" permissions to the "packet" class.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:38:19 +0000 (08:38 -0500)]
SELinux: Add a capabilities bitmap to SELinux policy version 22
Add a new policy capabilities bitmap to SELinux policy version 22. This bitmap
will enable the security server to query the policy to determine which features
it supports.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:38:13 +0000 (08:38 -0500)]
SELinux: Add a network node caching mechanism similar to the sel_netif_*() functions
This patch adds a SELinux IP address/node SID caching mechanism similar to the
sel_netif_*() functions. The node SID queries in the SELinux hooks files are
also modified to take advantage of this new functionality. In addition, remove
the address length information from the sk_buff parsing routines as it is
redundant since we already have the address family.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:38:10 +0000 (08:38 -0500)]
SELinux: Only store the network interface's ifindex
Instead of storing the packet's network interface name store the ifindex. This
allows us to defer the need to lookup the net_device structure until the audit
record is generated meaning that in the majority of cases we never need to
bother with this at all.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:38:08 +0000 (08:38 -0500)]
SELinux: Convert the netif code to use ifindex values
The current SELinux netif code requires the caller have a valid net_device
struct pointer to lookup network interface information. However, we don't
always have a valid net_device pointer so convert the netif code to use
the ifindex values we always have as part of the sk_buff. This patch also
removes the default message SID from the network interface record, it is
not being used and therefore is "dead code".
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:38:04 +0000 (08:38 -0500)]
NetLabel: Add IP address family information to the netlbl_skbuff_getattr() function
In order to do any sort of IP header inspection of incoming packets we need to
know which address family, AF_INET/AF_INET6/etc., it belongs to and since the
sk_buff structure does not store this information we need to pass along the
address family separate from the packet itself.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:37:59 +0000 (08:37 -0500)]
NetLabel: Add secid token support to the NetLabel secattr struct
This patch adds support to the NetLabel LSM secattr struct for a secid token
and a type field, paving the way for full LSM/SELinux context support and
"static" or "fallback" labels. In addition, this patch adds a fair amount
of documentation to the core NetLabel structures used as part of the
NetLabel kernel API.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:37:57 +0000 (08:37 -0500)]
NetLabel: Consolidate the LSM domain mapping/hashing locks
Currently we use two separate spinlocks to protect both the hash/mapping table
and the default entry. This could be considered a bit foolish because it adds
complexity without offering any real performance advantage. This patch
removes the dedicated default spinlock and protects the default entry with the
hash/mapping table spinlock.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:37:54 +0000 (08:37 -0500)]
NetLabel: Cleanup the LSM domain hash functions
The NetLabel/LSM domain hash table search function used an argument to specify
if the default entry should be returned if an exact match couldn't be found in
the hash table. This is a bit against the kernel's style so make two separate
functions to represent the separate behaviors.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Paul Moore [Tue, 29 Jan 2008 13:37:52 +0000 (08:37 -0500)]
NetLabel: Remove unneeded RCU read locks
This patch removes some unneeded RCU read locks as we can treat the reads as
"safe" even without RCU. It also converts the NetLabel configuration refcount
from a spinlock protected u32 into atomic_t to be more consistent with the rest
of the kernel.
Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.25: (1470 commits)
[IPV6] ADDRLABEL: Fix double free on label deletion.
[PPP]: Sparse warning fixes.
[IPV4] fib_trie: remove unneeded NULL check
[IPV4] fib_trie: More whitespace cleanup.
[NET_SCHED]: Use nla_policy for attribute validation in ematches
[NET_SCHED]: Use nla_policy for attribute validation in actions
[NET_SCHED]: Use nla_policy for attribute validation in classifiers
[NET_SCHED]: Use nla_policy for attribute validation in packet schedulers
[NET_SCHED]: sch_api: introduce constant for rate table size
[NET_SCHED]: Use typeful attribute parsing helpers
[NET_SCHED]: Use typeful attribute construction helpers
[NET_SCHED]: Use NLA_PUT_STRING for string dumping
[NET_SCHED]: Use nla_nest_start/nla_nest_end
[NET_SCHED]: Propagate nla_parse return value
[NET_SCHED]: act_api: use PTR_ERR in tcf_action_init/tcf_action_get
[NET_SCHED]: act_api: use nlmsg_parse
[NET_SCHED]: act_api: fix netlink API conversion bug
[NET_SCHED]: sch_netem: use nla_parse_nested_compat
[NET_SCHED]: sch_atm: fix format string warning
[NETNS]: Add namespace for ICMP replying code.
...
Linus Torvalds [Tue, 29 Jan 2008 11:48:03 +0000 (22:48 +1100)]
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (68 commits)
[MIPS] remove Documentation/mips/GT64120.README
[MIPS] Malta: remaining bits of the board support code cleanup
[MIPS] Malta: make the helper function static
[MIPS] Malta: fix braces at single statement blocks
[MIPS] Malta, Atlas: move an extern function declaration to the header file
[MIPS] Malta: Use C89 style for comments
[MIPS] Malta: else should follow close brace in malta_int.c
[MIPS] Malta: remove a superfluous comment
[MIPS] Malta: include <linux/cpu.h> instead of <asm/cpu.h>
[MIPS] Malta, Atlas, Sead: remove an extern from .c files
[MIPS] Malta: fix oversized lines in malta_int.c
[MIPS] Malta: remove a dead function declaration
[MIPS] Malta: use tabs not spaces
[MIPS] Malta: set up the screen info in a separate function
[MIPS] Malta: check the PCI clock frequency in a separate function
[MIPS] Malta: use the KERN_ facility level in printk()
[MIPS] Malta: use Linux kernel style for structure initialization
[MIPS]: constify function pointer tables
[MIPS] compat: handle argument endianess of sys32_(f)truncate64 with merge_64
[MIPS] Cobalt 64-bits kernels can be safely unmarked experimental
...
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (79 commits)
Remove references to "make dep"
kconfig: document use of HAVE_*
Introduce new section reference annotations tags: __ref, __refdata, __refconst
kbuild: warn about ld added unique sections
kbuild: add verbose option to Section mismatch reporting in modpost
kconfig: tristate choices with mixed tristate and boolean values
asm-generic/vmlix.lds.h: simplify __mem{init,exit}* dependencies
remove __attribute_used__
kbuild: support ARCH=x86 in buildtar
kconfig: remove "enable"
kbuild: simplified warning report in modpost
kbuild: introduce a few helpers in modpost
kbuild: use simpler section mismatch warnings in modpost
kbuild: link vmlinux.o before kallsyms passes
kbuild: introduce new option to enhance section mismatch analysis
Use separate sections for __dev/__cpu/__mem code/data
compiler.h: introduce __section()
all archs: consolidate init and exit sections in vmlinux.lds.h
kbuild: check section names consistently in modpost
kbuild: introduce blacklisting in modpost
...
Linus Torvalds [Tue, 29 Jan 2008 11:45:39 +0000 (22:45 +1100)]
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
Module: check to see if we have a built in module with the same name
module: add module taint on ndiswrapper
module: fix the module name length in param_sysfs_builtin
module: make module_address_lookup safe
module: better OOPS and lockdep coverage for loading modules
module: Fix gratuitous sprintf in module.c
module: wait for dependent modules doing init.
module: Don't report discarded init pages as kernel text.
Linus Torvalds [Tue, 29 Jan 2008 11:43:38 +0000 (22:43 +1100)]
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (50 commits)
jbd2: sparse pointer use of zero as null
jbd2: Use round-jiffies() function for the "5 second" ext4/jbd2 wakeup
jbd2: Mark jbd2 slabs as SLAB_TEMPORARY
jbd2: add lockdep support
ext4: Use the ext4_ext_actual_len() helper function
ext4: fix uniniatilized extent splitting error
ext4: Check for return value from sb_set_blocksize
ext4: Add stripe= option to /proc/mounts
ext4: Enable the multiblock allocator by default
ext4: Add multi block allocator for ext4
ext4: Add new functions for searching extent tree
ext4: Add ext4_find_next_bit()
ext4: fix up EXT4FS_DEBUG builds
ext4: Fix ext4_show_options to show the correct mount options.
ext4: Add EXT4_IOC_MIGRATE ioctl
ext4: Add inode version support in ext4
vfs: Add 64 bit i_version support
ext4: Add the journal checksum feature
jbd2: jbd2 stats through procfs
ext4: Take read lock during overwrite case.
...
Dmitri Vorobiev [Thu, 24 Jan 2008 16:52:57 +0000 (19:52 +0300)]
[MIPS] remove Documentation/mips/GT64120.README
Based upon the 2.4 kernel, the information presented in the
Documentation/mips/GT64120.README file is outdated. Worse,
the document contents are plain misleading nowadays because
the text mentions files and directories, which have been
deleted, moved or restructured for 2.6.
This patch removes the documentation, which is no more valid.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Dmitri Vorobiev [Thu, 24 Jan 2008 16:52:56 +0000 (19:52 +0300)]
[MIPS] Malta: remaining bits of the board support code cleanup
This patch factors out the code, which handles the Bonito system
controller. The case of not supporting the DMA coherency is handled
separately to make the logic obvious. Besides, a couple of empty
lines added to beautify the code even further.
No functional changes introduced.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Dmitri Vorobiev [Thu, 24 Jan 2008 16:52:48 +0000 (19:52 +0300)]
[MIPS] Malta, Atlas, Sead: remove an extern from .c files
This patch moves the "extern" declaration for the function
mips_reboot_setup() from the board setup .c files to the
header file include/asm-mips/mips-boards/generic.h.
This fixes a warning produced by the checkpatch.pl script.
No functional changes introduced.
This was compile-tested by building the kernel for all
three boards affected by this change. All builds finished
successfully.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Dmitri Vorobiev [Thu, 24 Jan 2008 16:52:46 +0000 (19:52 +0300)]
[MIPS] Malta: remove a dead function declaration
Neither is the mips_rtc_get_time() routine defined anywhere in
the MIPS architecture-specific code, nor does anyone call it any
more. This patch removes the extern declaration of this fossil.
This patch does not introduce any functional changes.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Tue, 29 Jan 2008 10:15:02 +0000 (10:15 +0000)]
[MIPS] Qemu: Remove platform.
The Qemu platform was originally implemented to have an easily supportable
platform until Qemu reaches a state where it emulates a real world system.
Since the latest release Qemu is capable of emulating the MIPSsim and
Malta platforms, so this goal has been reached. The Qemu plaform is also
rather underfeatured so less useful than a Malta emulation.
Ralf Baechle [Tue, 29 Jan 2008 10:15:00 +0000 (10:15 +0000)]
[MIPS] Altas, Malta: Switch boot file format to raw.
A raw binary boots about twice as fast as SREC.
The possibility to generate SREC binaries remains by simply using the
vmlinux.srec target but seems only useful for the probably hypothetical
case where one of these systems is booted over a serial interface.
Ralf Baechle [Tue, 29 Jan 2008 10:14:59 +0000 (10:14 +0000)]
[MIPS] Extend performance counter event field.
The latest draft version of the MIPS Architecture Specification extends the
6 bit event field by adding a directly adjacent 4-bit EventExt field for a
total of 10 bits.
- EISA support for non PCI RMs (RM200 and RM400-xxx). The major part
is the splitting of the EISA and onboard ISA of the RM200, which
makes the EISA bus on the RM200 look like on other RMs.
- 64bit kernel support
- system type detection is now common for big and little endian
- moved sniprom code to arch/mips/fw
- added call_o32 function to arch/mips/fw/lib, which uses a private
stack for calling prom functions
- fix problem with ISA interrupts, which makes using PIT clockevent
possible
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Manuel Lauss [Thu, 6 Dec 2007 08:07:55 +0000 (09:07 +0100)]
[MIPS] Alchemy: Au1210/Au1250 CPU support
This patch adds IDs for new Au1200 variants: Au1210 and Au1250.
They are essentially identical to the Au1200 except for the Au1210
which has a different SoC-ID in the PRId register [bits 31:24].
The Au1250 is a "Au1200 V0.2".
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Tue, 29 Jan 2008 10:14:59 +0000 (10:14 +0000)]
[MIPS] Eleminate local symbols from the symbol table.
These symbols appear in oprofile output, stacktraces and similar but only
make the output harder to read. Many identical symbol names such as
"both_aligned" were also being used in multiple source files making it
impossible to see which file actually was meant. So let's get rid of them.
Ralf Baechle [Tue, 29 Jan 2008 10:14:58 +0000 (10:14 +0000)]
[MIPS] Remove CONFIG_SIBYTE_PT{1120,1125,SWARM}
According to Broadcom the PT systems are production test systems which
never reached customers so no need to keep the fragmentary support we
currently have.
R10k non coherent machines need a real dma cache invalidate to get rid of
speculative stores in cache. For other machines this promises a slight
speedup.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Given that the corresponding source file i2c-yosemite.c file was
removed in commit daa4a68f901c4d6491baa1a01f5c869a553c3f6c, and that
no one else includes this file, it seems safe to delete it.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Andrew Sharp [Wed, 31 Oct 2007 21:11:24 +0000 (14:11 -0700)]
[MIPS] Put cast inside macro instead of all the callers
Since all the callers of the PHYS_TO_XKPHYS macro call with a constant,
put the cast to LL inside the macro where it really should be rather
than in all the callers. This makes macros like PHYS_TO_XKSEG_UNCACHED
work without gcc whining.
Signed-off-by: Andrew Sharp <andy.sharp@onstor.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This complements the generic R4000/R4400 errata workaround code and adds
bits for the daddiu problem. In most places it just modifies handwritten
assembly code so that the assembler is allowed to use a temporary register
as daddiu may now be treated as a macro that expands to a sequence of li
and daddu. It is the AT register or, where AT is unavailable or used
explicitly for another purpose, an explicitly-named register is selected,
using the .set at=<reg> feature added recently to gas. This feature is
only used if CONFIG_CPU_DADDI_WORKAROUNDS has been set, so if the
workaround remains disabled, the required version of binutils stays
unchanged.
Similarly, daddiu instructions put in branch delay slots in noreorder
fragments are now taken out of them and the assembler is allowed to
reorder them itself as possible (which it does making the whole idea of
scheduling them into delay slots manually questionable).
Also in the very few places where such a simple conversion was not
possible, a handcoded longer sequence is implemented.
Other than that there are changes to code responsible for building the
TLB fault and page clear/copy handlers to avoid daddiu as appropriate.
These are only effective if the erratum is verified to be present at the
run time.
Finally there is a trivial update to __delay(), because it uses daddiu in
a branch delay slot.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This is the gereric part of R4000/R4400 errata workarounds. They include
compiler and assembler support as well as some source code modifications
to address the problems with some combinations of multiply/divide+shift
instructions as well as the daddi and daddiu instructions.
Changes included are as follows:
1. New Kconfig options to select workarounds by platforms as necessary.
2. Arch top-level Makefile to pass necessary options to the compiler; also
incompatible configurations are detected (-mno-sym32 unsupported as
horribly intrusive for little gain).
3. Bug detection updated and shuffled -- the multiply/divide+shift problem
is lethal enough that if not worked around it makes the kernel crash in
time_init() because of a division by zero; the daddiu erratum might
also trigger early potentially, though I have not observed it. On the
other hand the daddi detection code requires the exception subsystem to
have been initialised (and is there mainly for information).
4. r4k_daddiu_bug() added so that the existence of the erratum can be
queried by code at the run time as necessary; useful for generated code
like TLB fault and copy/clear page handlers.
5. __udelay() updated as it uses multiplication in inline assembly.
Note that -mdaddi requires modified toolchain (which has been maintained
by myself and available from my site for ~4years now -- versions covered
are GCC 2.95.4 - 4.1.2 and binutils from 2.13 onwards). The -mfix-r4000
and -mfix-r4400 have been standard for a while though.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Module: check to see if we have a built in module with the same name
When trying to load a module with the same name as a built-in one, a
scary kobject backtrace comes up. Prevent that from checking for this
condition and warning the user as to what exactly is going on.
Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Jon Masters [Mon, 21 Jan 2008 20:43:41 +0000 (20:43 +0000)]
module: add module taint on ndiswrapper
The struct module taints member is supposed to store per-module taint
data. The kernel knows about certain specific external modules that will
taint the kernel, such as ndiswrapper. Use of ndiswrapper possibly
should set the per-module taint in addition to the global kernel
taint flag, unless we're arguing not because wrapper module itself
is not what actually causes the kernel to be tainted as such?
Signed-off-by: Jon Masters <jcm@jonmasters.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Denis Cheng [Mon, 21 Jan 2008 09:08:25 +0000 (17:08 +0800)]
module: fix the module name length in param_sysfs_builtin
the original code use KOBJ_NAME_LEN for built-in module name length,
that's defined to 20 in linux/kobject.h, but this is not enough appearntly,
many module names are longer than this;
#define KOBJ_NAME_LEN 20
another macro is MODULE_NAME_LEN defined in linux/module.h, I think this is
enough for module names:
#define MODULE_NAME_LEN (64 - sizeof(unsigned long))
Signed-off-by: Denis Cheng <crquan@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell [Tue, 29 Jan 2008 22:13:22 +0000 (17:13 -0500)]
module: make module_address_lookup safe
module_address_lookup releases preemption then returns a pointer into
the module space. The only user (kallsyms) copies the result, so just
do that under the preempt disable.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell [Tue, 29 Jan 2008 22:13:21 +0000 (17:13 -0500)]
module: better OOPS and lockdep coverage for loading modules
If we put the module in the linked list *before* calling into to, we
get the module name and functions in the OOPS (is_module_address can
find the module). It also helps lockdep in a similar way.
Acked-and-tested-by: Joern Engel <joern@lazybastard.org> Tested-by: Erez Zadok <ezk@cs.sunysb.edu> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell [Tue, 29 Jan 2008 22:13:18 +0000 (17:13 -0500)]
module: wait for dependent modules doing init.
There have been reports of modules failing to load because the modules
they depend on are still loading. This changes the modules to wait
for a reasonable length of time in that case. We time out eventually,
because there can be module loops or broken modules.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell [Tue, 29 Jan 2008 22:13:17 +0000 (17:13 -0500)]
module: Don't report discarded init pages as kernel text.
Current code could cause a bug in symbol_put_addr() if an arch used
kmalloc module text: we might think the symbol belongs to the core
kernel.
The downside is that this might make backtraces through (discarded)
init functions harder to read on some archs, but we already have that
issue for modules and noone has complained.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Mingming Cao [Tue, 29 Jan 2008 04:58:27 +0000 (23:58 -0500)]
jbd2: Use round-jiffies() function for the "5 second" ext4/jbd2 wakeup
While "every 5 seconds" doesn't sound as a problem, there can be many
of these (and these timers do add up over all the kernel). The "5
second" wakeup isn't really timing sensitive; in addition even with
rounding it'll still happen every 5 seconds (with the exception of the
very first time, which is likely to be rounded up to somewhere closer
to 6 seconds)
(Ported from similar JBD patch made by Arjan van de Ven to
fs/jbd/transaction.c)
Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Mingming Cao [Tue, 29 Jan 2008 04:58:27 +0000 (23:58 -0500)]
jbd2: Mark jbd2 slabs as SLAB_TEMPORARY
This patch marks slab allocations by jbd2 as short-lived in support of
Mel Gorman's "Group short-lived and reclaimable kernel allocations"
patch. (Ported from similar changes made to fs/jbd/journal.c and
fs/jbd/revoke.c in Mel's patch.)
Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
ext4: Use the ext4_ext_actual_len() helper function
ext4 uses the high bit of the extent length to encode whether the extent
is intialized or not. The helper function ext4_ext_get_actual_len should
be used to get the actual length of the extent.
This addresses the kernel bug documented here:
http://bugzilla.kernel.org/show_bug.cgi?id=9732
Dmitry Monakhov [Tue, 29 Jan 2008 04:58:27 +0000 (23:58 -0500)]
ext4: fix uniniatilized extent splitting error
Fix bug reported by Dmitry Monakhov caused by lost error code
Testcase:
blksize = 0x1000;
fd = open(argv[1], O_RDWR|O_CREAT, 0700);
unsigned long long sz = 0x10000000UL;
/* allocating big blocks chunk */
syscall(__NR_fallocate, fd, 0, 0UL, sz)
/* grab all other available filesystem space */
tfd = open("tmp", O_RDWR|O_CREAT|O_DIRECT, 0700);
while( write(tfd, buf, 4096) > 0); /* loop untill ENOSPC */
fsync(fd); /* just in case */
while (pos < sz) {
/* each seek+ write operation result in splits uninitialized extent
in three extents. Splitting may result in new extent allocation
which probably will fail because of ENOSPC*/
ext4: Check for return value from sb_set_blocksize
sb_set_blocksize validates whether the specfied block size can be used by
the file system. Make sure we fail mounting the file system if the
blocksize specfied cannot be used.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
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