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2010-07-23nilfs2: unify bmap set_target_v operationsRyusuke Konishi3-17/+10
This unifies two similar functions nilfs_btree_set_target_v and nilfs_direct_set_target_v into one, nilfs_bmap_set_target_v. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: get rid of nilfs_btree usesRyusuke Konishi2-177/+141
This replaces all uses of nilfs_btree struct in implementation of btree mapping with nilfs_bmap struct. Name of local variable "btree" is kept not to bloat amount of change. And, a part of local variables "bmap" is renamed to "btree" to uniform naming rule. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: get rid of nilfs_direct usesRyusuke Konishi1-46/+32
This replaces all uses of nilfs_direct struct in implementation of direct mapping with nilfs_bmap struct. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: remove constant qualifier from argument of bmap propagateRyusuke Konishi3-4/+4
The first argument of bops->bop_propagate operation takes a constant qualifier, and causes compilation error when removed cast to pointer of nilfs_btree structure type. This fixes the issue to prepare for succesive removal of nilfs_btree struct. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: get rid of private conversion macros on bmap key and pointerRyusuke Konishi3-29/+22
Will remove nilfs_bmap_key_to_dkey(), nilfs_bmap_dkey_to_key(), nilfs_bmap_ptr_to_dptr(), and nilfs_bmap_dptr_to_ptr() for simplicity. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: verify btree node after readingRyusuke Konishi3-5/+56
This inserts sanity checks soon after read btree node from disk. This allows early detection of broken btree nodes, and helps to narrow down problems due to file system corruption. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: add sanity check in nilfs_btree_add_dirty_bufferRyusuke Konishi1-0/+12
According to the report titled "problem with nilfs_cleanerd" from Łukasz Wójcicki, nilfs_btree_lookup_dirty_buffers or nilfs_btree_add_dirty_buffer got memory violation during garbage collection. This could happen if a level field of given btree node buffer is incorrect, which is a crucial internal bug. This inserts a sanity check to figure out the problem. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: pass remount flag to parse_optionsRyusuke Konishi1-23/+26
This adds is_remount argument to the parse_options() function that obtains mount options from strings. Previously, parse_options did not distinguish context whether it's called for a new mount or remount, so the caller needed additional verifications outside the function. This allows parse_options to verify options and print messages depending on the context. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: use seq_puts to print mount options without argumentRyusuke Konishi1-6/+6
This replaces seq_printf() with seq_puts() in nilfs_show_options for mount options which have no argument. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: add nodiscard mount optionRyusuke Konishi2-4/+9
Nilfs has "discard" mount option which issues discard/TRIM commands to underlying block device, but it lacks a complementary option and has no way to disable the feature through remount. This adds "nodiscard" option to resolve this imbalance. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: add barrier mount optionRyusuke Konishi2-2/+9
Nilfs enables write barriers by default and has "nobarrier" mount option to disable this feature. But it lacks the complementary option and has no way to re-enable the feature on remount. This adds "barrier" option to resolve this imbalance. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: do not update log cursor for small changeRyusuke Konishi3-1/+13
Super blocks of nilfs are periodically overwritten in order to record the recent log position. This shortens recovery time after unclean unmount, but the current implementation performs the update even for a few blocks of change. If the filesystem gets small changes slowly and continually, super blocks may be updated excessively. This moderates the issue by skipping update of log cursor if it does not cross a segment boundary. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: implement fallback for super root searchRyusuke Konishi1-2/+50
Although nilfs redundantly uses two super blocks and each may point to different position on log, the current version of nilfs does not try fallback to the spare super block when it doesn't find any valid log at the position that the primary super block points to. This has been a cause of mount failures due to write order reversals on barrier less block devices. This inserts fallback code in error path of nilfs_search_super_root routine to resolve the mount failure problem. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: add missing error code in comment of nilfs_search_super_rootRyusuke Konishi1-0/+2
nilfs_search_super_root can return -ENOMEM, but this error code is not described in its kernel-doc comment. This fixes the discrepancy. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: separate setup of log cursor from init_nilfsRyusuke Konishi1-13/+32
This separates a setup routine of log cursor from init_nilfs(). The routine, nilfs_store_log_cursor, reads the last position of the log containing a super root, and initializes relevant state on the nilfs object. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: sync super blocks in turnsJiro SEKIBA5-46/+91
This will sync super blocks in turns instead of syncing duplicate super blocks at the time. This will help searching valid super root when super block is written into disk before log is written, which is happen when barrier-less block devices are unmounted uncleanly. In the situation, old super block likely points to valid log. This patch introduces ns_sbwcount member to the nilfs object and adds nilfs_sb_will_flip() function; ns_sbwcount counts how many times super blocks write back to the disk. And, nilfs_sb_will_flip() decides whether flipping required or not based on the count of ns_sbwcount to sync super blocks asymmetrically. The following functions are also changed: - nilfs_prepare_super(): flips super blocks according to the argument. The argument is calculated by nilfs_sb_will_flip() function. - nilfs_cleanup_super(): sets "clean" flag to both super blocks if they point to the same checkpoint. To update both of super block information, caller of nilfs_commit_super must set the information on both super blocks. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: introduce nilfs_prepare_superJiro SEKIBA3-24/+58
This function checks validity of super block pointers. If first super block is invalid, it will swap the super blocks. The function should be called before any super block information updates. Caller must obtain nilfs->ns_sem. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: separate function that updates log positionRyusuke Konishi2-13/+19
This moves out section that updates information of the recent log position stored in super blocks from nilfs_commit_super to a new routine named nilfs_set_log_cursor. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: add nilfs_set_errorRyusuke Konishi1-10/+14
This function marks error state and write it on super blocks. This is a preparation for making super block writeback alternately. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: add nilfs_cleanup_superRyusuke Konishi3-11/+23
This function write out filesystem state to super blocks in order to share the same cleanup work. This is a preparation for making super block writeback alternately. Cc: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: do not update mount time on rw->ro remountRyusuke Konishi1-1/+0
Mount time field in super block is wrongly updated when nilfs remounts the partition from read-write to read-only. This fixes the issue. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: get rid of ns_free_segments_countRyusuke Konishi2-5/+0
This counter is unused. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: get rid of macros for segment summary informationRyusuke Konishi2-15/+17
This removes macros to test segment summary flags and redefines a few relevant macros with inline functions. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: do not use nilfs_segsum_info structure in recovery codeRyusuke Konishi1-54/+37
This will get rid of nilfs_segsum_info use from recovery functions for simplicity. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: divide load_segment_summary functionRyusuke Konishi1-41/+69
load_segment_summary function has two distinct roles: getting summary header of a log, and verifying consistencies of the log. This divide it into two corresponding functions, nilfs_read_log_header and nilfs_validate_log to clarify the meaning. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: rename nilfs_recover_logical_segments functionRyusuke Konishi3-10/+9
The function name of nilfs_recover_logical_segments makes no sense. This changes the name into nilfs_salvage_orphan_logs to clarify the role of the function. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: refactor recovery logic routinesRyusuke Konishi3-73/+100
Most functions in recovery code take an argument of a super block instance or a nilfs_sb_info struct for convenience sake. This replaces them aggressively with a nilfs object by applying __bread and __breadahead against routines using sb_bread and sb_breadahead. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-23nilfs2: add blocksize member to nilfs objectRyusuke Konishi2-0/+3
This stores blocksize in nilfs objects for the successive refactoring of recovery logic. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2010-07-22Linux 2.6.35-rc6v2.6.35-rc6Linus Torvalds1-1/+1
2010-07-22Merge branch 'for-linus' of ↵Linus Torvalds8-16/+44
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: synaptics - relax capability ID checks on newer hardware Input: twl40300-keypad - fix handling of "all ground" rows Input: gamecon - reference correct pad in gc_psx_command() Input: gamecon - reference correct input device in NES mode Input: w90p910_keypad - change platfrom driver name to 'nuc900-kpi' Input: i8042 - add Gigabyte Spring Peak to dmi_noloop_table Input: qt2160 - rename kconfig symbol name
2010-07-22Merge branch 'drm-fixes' of ↵Linus Torvalds7-10/+15
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm/radeon/kms: add quirk to make HP DV5000 laptop resume drm/radeon/kms: fix RADEON_INFO_CRTC_FROM_ID info ioctl Fix ttm_page_alloc.c build breakage drm/radeon/kms: fix legacy LVDS dpms sequence drm/radeon/kms: drop taking lock around crtc lookup.
2010-07-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds1-1/+5
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: talitos - fix bug in sg_copy_end_to_buffer
2010-07-22Merge branch 'x86/auditsyscall' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland * 'x86/auditsyscall' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland: x86: auditsyscall: fix fastpath return value after reschedule
2010-07-22Merge branch 'for_linus' of ↵Linus Torvalds5-10/+11
git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: sysrq,kdb: Use __handle_sysrq() for kdb's sysrq function debug_core,kdb: fix kgdb_connected bit set in the wrong place Fix merge regression from external kdb to upstream kdb repair gdbstub to match the gdbserial protocol specification kdb: break out of kdb_ll() when command is terminated
2010-07-22CIFS: Fix a malicious redirect problem in the DNS lookup codeDavid Howells3-5/+74
Fix the security problem in the CIFS filesystem DNS lookup code in which a malicious redirect could be installed by a random user by simply adding a result record into one of their keyrings with add_key() and then invoking a CIFS CFS lookup [CVE-2010-2524]. This is done by creating an internal keyring specifically for the caching of DNS lookups. To enforce the use of this keyring, the module init routine creates a set of override credentials with the keyring installed as the thread keyring and instructs request_key() to only install lookup result keys in that keyring. The override is then applied around the call to request_key(). This has some additional benefits when a kernel service uses this module to request a key: (1) The result keys are owned by root, not the user that caused the lookup. (2) The result keys don't pop up in the user's keyrings. (3) The result keys don't come out of the quota of the user that caused the lookup. The keyring can be viewed as root by doing cat /proc/keys: 2a0ca6c3 I----- 1 perm 1f030000 0 0 keyring .dns_resolver: 1/4 It can then be listed with 'keyctl list' by root. # keyctl list 0x2a0ca6c3 1 key in keyring: 726766307: --alswrv 0 0 dns_resolver: foo.bar.com Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-and-Tested-by: Jeff Layton <jlayton@redhat.com> Acked-by: Steve French <smfrench@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-07-22drm/radeon/kms: add quirk to make HP DV5000 laptop resumeAlex Deucher1-0/+8
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=29062 Reported-by: Andres Cimmarusti <acimmarusti@gmail.com> Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-07-22Input: synaptics - relax capability ID checks on newer hardwareDmitry Torokhov2-2/+8
Older firmwares fixed the middle byte of the Synaptics capabilities query to 0x47, but starting with firmware 7.5 the middle byte represents submodel ID, sometimes also called "dash number". Reported-and-tested-by: Miroslav Šulc <fordfrog@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-07-22x86: auditsyscall: fix fastpath return value after rescheduleRoland McGrath1-2/+2
In the CONFIG_AUDITSYSCALL fast-path for x86 64-bit system calls, we can pass a bad return value and/or error indication for the system call to audit_syscall_exit(). This happens when TIF_NEED_RESCHED was set as the system call returned, so we went out to schedule() and came back to the exit-audit fast-path. The fix is to reload the user return value register from the pt_regs before using it for audit_syscall_exit(). Both the 32-bit kernel's fast path and the 64-bit kernel's 32-bit system call fast paths work slightly differently, so that they always leave the fast path entirely to reschedule and don't return there, so they don't have the analogous bugs. Reported-by: Alexander Viro <aviro@redhat.com> Signed-off-by: Roland McGrath <roland@redhat.com>
2010-07-22sysrq,kdb: Use __handle_sysrq() for kdb's sysrq functionJason Wessel3-3/+3
The kdb code should not toggle the sysrq state in case an end user wants to try and resume the normal kernel execution. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2010-07-22debug_core,kdb: fix kgdb_connected bit set in the wrong placeJason Wessel1-1/+1
Immediately following an exit from the kdb shell the kgdb_connected variable should be set to zero, unless there are breakpoints planted. If the kgdb_connected variable is not zeroed out with kdb, it is impossible to turn off kdb. This patch is merely a work around for now, the real fix will check for the breakpoints. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-07-22Fix merge regression from external kdb to upstream kdbJason Wessel1-0/+1
In the process of merging kdb to the mainline, the kdb lsmod command stopped printing the base load address of kernel modules. This is needed for using kdb in conjunction with external tools such as gdb. Simply restore the functionality by adding a kdb_printf for the base load address of the kernel modules. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-07-22repair gdbstub to match the gdbserial protocol specificationJason Wessel1-6/+3
The gdbserial protocol handler should return an empty packet instead of an error string when ever it responds to a command it does not implement. The problem cases come from a debugger client sending qTBuffer, qTStatus, qSearch, qSupported. The incorrect response from the gdbstub leads the debugger clients to not function correctly. Recent versions of gdb will not detach correctly as a result of this behavior. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
2010-07-22kdb: break out of kdb_ll() when command is terminatedMartin Hicks1-0/+3
Without this patch the "ll" linked-list traversal command won't terminate when you hit q/Q. Signed-off-by: Martin Hicks <mort@sgi.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-07-22drm/radeon/kms: fix RADEON_INFO_CRTC_FROM_ID info ioctlAlex Deucher1-1/+2
Return the crtc_id, not the counter value. They are not necessarily the same. Cc: Jerome Glisse <glisse@freedesktop.org> Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-07-22Fix ttm_page_alloc.c build breakageLuck, Tony1-3/+3
The commit 1e8655f87333def92bb8215b423adc65403b08a5 drm/ttm: Fix build on architectures without AGP looks at TTM_HAS_AGP before it has been set in ttm_bo_driver.h Move the conditional inclusion of <asm/agp.h> *after* we have included ttm_bo_driver.h Signed-of-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-07-22drm/radeon/kms: fix legacy LVDS dpms sequenceAlex Deucher1-0/+1
Add delay after turning off the LVDS encoder. Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=16389 Tested-by: Jan Kreuzer <kontrollator@gmx.de> Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-07-22drm/radeon/kms: drop taking lock around crtc lookup.Dave Airlie3-6/+1
We only add/remove crtcs at driver load, you cannot remove when the GPU is running a CS packet since the fd is open, when GPU hotplugging on radeons actually is needed all this locking needs a review and I've started re-working kms core locking to deal with this better. But for now avoid long delays in CS processing when hotplug detect is happening in a different thread. this fixes a regression introduced with hotplug detection. Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-07-21Merge branch 'urgent' of ↵Linus Torvalds1-1/+3
git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 * 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6: pcmcia: fix 'driver ... did not release config properly' warning
2010-07-21Merge branch 'shrinker' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/dgc/xfsdev * 'shrinker' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/xfsdev: mm: add context argument to shrinker callback to remaining shrinkers
2010-07-21Merge branch 'fix/asoc' of ↵Linus Torvalds5-20/+15
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 * 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ASoC: Select wm_hubs automatically for WM8994 ASoC: Remove duplicate AUX definition from WM8776 ASoC:: remove a redundant snd_soc_unregister_codec call in wm8988_register ASoC: wm8727: add a missing return in wm8727_platform_probe ASoC: fsi: fixup wrong value setting order of TDM ASoC: fsi: fixup clock inversion operation
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