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2008-01-30NetLabel: Add auditing to the static labeling mechanismPaul Moore
This patch adds auditing support to the NetLabel static labeling mechanism. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2008-01-30NetLabel: Introduce static network labels for unlabeled connectionsPaul Moore
Most trusted OSs, with the exception of Linux, have the ability to specify static security labels for unlabeled networks. This patch adds this ability to the NetLabel packet labeling framework. If the NetLabel subsystem is called to determine the security attributes of an incoming packet it first checks to see if any recognized NetLabel packet labeling protocols are in-use on the packet. If none can be found then the unlabled connection table is queried and based on the packets incoming interface and address it is matched with a security label as configured by the administrator using the netlabel_tools package. The matching security label is returned to the caller just as if the packet was explicitly labeled using a labeling protocol. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2008-01-30SELinux: Enable dynamic enable/disable of the network access checksPaul Moore
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>
2008-01-30NetLabel: Add IP address family information to the netlbl_skbuff_getattr() ↵Paul Moore
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>
2008-01-30NetLabel: Add secid token support to the NetLabel secattr structPaul Moore
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>
2008-01-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.25Linus Torvalds
* 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. ...
2008-01-29Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds
* '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 ...
2008-01-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds
* 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 ...
2008-01-29Merge branch 'master' of ↵Linus Torvalds
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.
2008-01-29[MIPS] Malta, Atlas: move an extern function declaration to the header fileDmitri Vorobiev
This was compile-tested using default configs for the boards affected by this change. 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>
2008-01-29[MIPS] Malta, Atlas, Sead: remove an extern from .c filesDmitri Vorobiev
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>
2008-01-29[MIPS] Qemu: Remove platform.Ralf Baechle
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. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] Delete CONFIG_MSP_FPGARalf Baechle
Originally noticed by Jiri Olsa <olsajiri@gmail.com>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] remove unneeded button check for resetYoichi Yuasa
Removed unneeded button check for reset. Because, the Cobalt has power switch. Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] time: remove unused mips_timer_state()Yoichi Yuasa
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] fixmap: delete unused __set_fixmap, set_fixmap and set_fixmap_nocacheRalf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] RM: Collected changesThomas Bogendoerfer
- 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>
2008-01-29[MIPS] Alchemy: Au1210/Au1250 CPU supportManuel Lauss
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>
2008-01-29[MIPS] IP28 supportThomas Bogendoerfer
Add support for SGI IP28 machines (Indigo 2 with R10k CPUs) This work is mainly based on Peter Fuersts work. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] Remove CONFIG_SIBYTE_PT{1120,1125,SWARM}Ralf Baechle
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. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] IP28: added cache barrier to assembly routinesThomas Bogendoerfer
IP28 needs special treatment to avoid speculative accesses. gcc takes care for .c code, but for assembly code we need to do it manually. This is taken from Peter Fuersts IP28 patches. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] TXx9 watchdog support for rbhma3100,rbhma4200,rbhma4500Atsushi Nemoto
This patch adds support for txx9wdt driver to rbhma3100, rbhma4200 and rbhma4500 platform. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] IP22/IP28: fix extracting board/chip revThomas Bogendoerfer
Taken from Peter Fuersts IP28 patches Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] Use real cache invalidateThomas Bogendoerfer
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>
2008-01-29[MIPS] SMP: Call platform methods via ops structure.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] MT: Scheduler support for SMTRalf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] Put cast inside macro instead of all the callersAndrew Sharp
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>
2008-01-29[MIPS] remove unused mips_machtypeYoichi Yuasa
Removed unused mips_machtype. These are only set but not used. Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] CFE: Make code remotely resemble Linux code.Christoph Hellwig
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29[MIPS] R4000/R4400 daddiu erratum workaroundMaciej W. Rozycki
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>
2008-01-29[MIPS] R4000/R4400 errata workaroundsMaciej W. Rozycki
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>
2008-01-29module: make module_address_lookup safeRusty Russell
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>
2008-01-28jbd2: add lockdep supportMingming Cao
Ported from similar patch for the jbd layer. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-29ext4: Add multi block allocator for ext4Alex Tomas
Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28ext4: Add new functions for searching extent treeAlex Tomas
Add the functions ext4_ext_search_left() and ext4_ext_search_right(), which are used by mballoc during ext4_ext_get_blocks to decided whether to merge extent information. Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Johann Lombardi <johann@clusterfs.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28ext4: Add ext4_find_next_bit()Aneesh Kumar K.V
This function is used by the ext4 multi block allocator patches. Also add generic_find_next_le_bit Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-01-28ext4: Add EXT4_IOC_MIGRATE ioctlAneesh Kumar K.V
The below patch add ioctl for migrating ext3 indirect block mapped inode to ext4 extent mapped inode. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2008-01-28ext4: Add inode version support in ext4Jean Noel Cordenner
This patch adds 64-bit inode version support to ext4. The lower 32 bits are stored in the osd1.linux1.l_i_version field while the high 32 bits are stored in the i_version_hi field newly created in the ext4_inode. This field is incremented in case the ext4_inode is large enough. A i_version mount option has been added to enable the feature. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Kalpak Shah <kalpak@clusterfs.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@bull.net>
2008-01-28vfs: Add 64 bit i_version supportJean Noel Cordenner
The i_version field of the inode is changed to be a 64-bit counter that is set on every inode creation and that is incremented every time the inode data is modified (similarly to the "ctime" time-stamp). The aim is to fulfill a NFSv4 requirement for rfc3530. This first part concerns the vfs, it converts the 32-bit i_version in the generic inode to a 64-bit, a flag is added in the super block in order to check if the feature is enabled and the i_version is incremented in the vfs. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@bull.net> Signed-off-by: Kalpak Shah <kalpak@clusterfs.com>
2008-01-28ext4: Add the journal checksum featureGirish Shilamkar
The journal checksum feature adds two new flags i.e JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT and JBD2_FEATURE_COMPAT_CHECKSUM. JBD2_FEATURE_CHECKSUM flag indicates that the commit block contains the checksum for the blocks described by the descriptor blocks. Due to checksums, writing of the commit record no longer needs to be synchronous. Now commit record can be sent to disk without waiting for descriptor blocks to be written to disk. This behavior is controlled using JBD2_FEATURE_ASYNC_COMMIT flag. Older kernels/e2fsck should not be able to recover the journal with _ASYNC_COMMIT hence it is made incompat. The commit header has been extended to hold the checksum along with the type of the checksum. For recovery in pass scan checksums are verified to ensure the sanity and completeness(in case of _ASYNC_COMMIT) of every transaction. Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Girish Shilamkar <girish@clusterfs.com> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2008-01-28jbd2: jbd2 stats through procfsJohann Lombardi
The patch below updates the jbd stats patch to 2.6.20/jbd2. The initial patch was posted by Alex Tomas in December 2005 (http://marc.info/?l=linux-ext4&m=113538565128617&w=2). It provides statistics via procfs such as transaction lifetime and size. Sometimes, investigating performance problems, i find useful to have stats from jbd about transaction's lifetime, size, etc. here is a patch for review and inclusion probably. for example, stats after creation of 3M files in htree directory: [root@bob ~]# cat /proc/fs/jbd/sda/history R/C tid wait run lock flush log hndls block inlog ctime write drop close R 261 8260 2720 0 0 750 9892 8170 8187 C 259 750 0 4885 1 R 262 20 2200 10 0 770 9836 8170 8187 R 263 30 2200 10 0 3070 9812 8170 8187 R 264 0 5000 10 0 1340 0 0 0 C 261 8240 3212 4957 0 R 265 8260 1470 0 0 4640 9854 8170 8187 R 266 0 5000 10 0 1460 0 0 0 C 262 8210 2989 4868 0 R 267 8230 1490 10 0 4440 9875 8171 8188 R 268 0 5000 10 0 1260 0 0 0 C 263 7710 2937 4908 0 R 269 7730 1470 10 0 3330 9841 8170 8187 R 270 0 5000 10 0 830 0 0 0 C 265 8140 3234 4898 0 C 267 720 0 4849 1 R 271 8630 2740 20 0 740 9819 8170 8187 C 269 800 0 4214 1 R 272 40 2170 10 0 830 9716 8170 8187 R 273 40 2280 0 0 3530 9799 8170 8187 R 274 0 5000 10 0 990 0 0 0 where, R - line for transaction's life from T_RUNNING to T_FINISHED C - line for transaction's checkpointing tid - transaction's id wait - for how long we were waiting for new transaction to start (the longest period journal_start() took in this transaction) run - real transaction's lifetime (from T_RUNNING to T_LOCKED lock - how long we were waiting for all handles to close (time the transaction was in T_LOCKED) flush - how long it took to flush all data (data=ordered) log - how long it took to write the transaction to the log hndls - how many handles got to the transaction block - how many blocks got to the transaction inlog - how many blocks are written to the log (block + descriptors) ctime - how long it took to checkpoint the transaction write - how many blocks have been written during checkpointing drop - how many blocks have been dropped during checkpointing close - how many running transactions have been closed to checkpoint this one all times are in msec. [root@bob ~]# cat /proc/fs/jbd/sda/info 280 transaction, each upto 8192 blocks average: 1633ms waiting for transaction 3616ms running transaction 5ms transaction was being locked 1ms flushing data (in ordered mode) 1799ms logging transaction 11781 handles per transaction 5629 blocks per transaction 5641 logged blocks per transaction Signed-off-by: Johann Lombardi <johann.lombardi@bull.net> Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Eric Sandeen <sandeen@redhat.com>
2008-01-28ext4: Convert truncate_mutex to read write semaphore.Aneesh Kumar K.V
We are currently taking the truncate_mutex for every read. This would have performance impact on large CPU configuration. Convert the lock to read write semaphore and take read lock when we are trying to read the file. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2008-01-28ext4: Make ext4_get_blocks_wrap take the truncate_mutex early.Aneesh Kumar K.V
When doing a migrate from ext3 to ext4 inode we need to make sure the test for inode type and walking inode data happens inside lock. To make this happen move truncate_mutex early before checking the i_flags. This actually should enable us to remove the verify_chain(). Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2008-01-28jbd2: Fix assertion failure in fs/jbd2/checkpoint.cJan Kara
Before we start committing a transaction, we call __journal_clean_checkpoint_list() to cleanup transaction's written-back buffers. If this call happens to remove all of them (and there were already some buffers), __journal_remove_checkpoint() will decide to free the transaction because it isn't (yet) a committing transaction and soon we fail some assertion - the transaction really isn't ready to be freed :). We change the check in __journal_remove_checkpoint() to free only a transaction in T_FINISHED state. The locking there is subtle though (as everywhere in JBD ;(). We use j_list_lock to protect the check and a subsequent call to __journal_drop_transaction() and do the same in the end of journal_commit_transaction() which is the only place where a transaction can get to T_FINISHED state. Probably I'm too paranoid here and such locking is not really necessary - checkpoint lists are processed only from log_do_checkpoint() where a transaction must be already committed to be processed or from __journal_clean_checkpoint_list() where kjournald itself calls it and thus transaction cannot change state either. Better be safe if something changes in future... Signed-off-by: Jan Kara <jack@suse.cz> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-01-28jbd2: Remove printk from J_ASSERT to preserve registers during BUGChris Snook
Signed-off-by: Chris Snook <csnook@redhat.com> Cc: "Stephen C. Tweedie" <sct@redhat.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28Add buffer head related helper functionsAneesh Kumar K.V
Add buffer head related helper function bh_uptodate_or_lock and bh_submit_read which can be used by file system Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2008-01-28ext4: sync up block group descriptor with e2fsprogs.Coly Li
This patch extends bg_itable_unused of ext4 group descriptor from 16bit into 32bit. In order to add bg_itable_unused_hi into struct ext4_group_desc, some extra fields which are already introduced into e2fsprogs are also added in for consistency. Signed-off-by: Coly Li <coyli@suse.de> Cc: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2008-01-28ext4: store maxbytes for bitmapped files and return EFBIG as appropriateEric Sandeen
Calculate & store the max offset for bitmapped files, and catch too-large seeks, truncates, and writes in ext4, shortening or rejecting as appropriate. Signed-off-by: Eric Sandeen <sandeen@redhat.com>
2008-01-28ext4: Support large filesAneesh Kumar K.V
This patch converts ext4_inode i_blocks to represent total blocks occupied by the inode in file system block size. Earlier the variable used to represent this in 512 byte block size. This actually limited the total size of the file. The feature is enabled transparently when we write an inode whose i_blocks cannot be represnted as 512 byte units in a 48 bit variable. inode flag EXT4_HUGE_FILE_FL Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2008-01-28ext4: Add support for 48 bit inode i_blocks.Aneesh Kumar K.V
Use the __le16 l_i_reserved1 field of the linux2 struct of ext4_inode to represet the higher 16 bits for i_blocks. With this change max_file size becomes (2**48 -1 )* 512 bytes. We add a RO_COMPAT feature to the super block to indicate that inode have i_blocks represented as a split 48 bits. Super block with this feature set cannot be mounted read write on a kernel with CONFIG_LSF disabled. Super block flag EXT4_FEATURE_RO_COMPAT_HUGE_FILE Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>