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2008-10-10dm exception store: use chunk_t for_areasMikulas Patocka
Change uint32_t into chunk_t to remove 32-bit limitation on the number of chunks on systems with 64-bit sector numbers. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2008-10-10dm exception store: introduce area_location functionMikulas Patocka
Move this logic to a function, because it will be reused later. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2008-10-10dm raid1: kcopyd should stop on error if errors handledJonathan Brassow
dm-raid1 is setting the 'DM_KCOPYD_IGNORE_ERROR' flag unconditionally when assigning kcopyd work. kcopyd is responsible for copying an assigned section of disk to one or more other disks. The 'DM_KCOPYD_IGNORE_ERROR' flag affects kcopyd in the following way: When not set: kcopyd will immediately stop the copy operation when an error is encountered. When set: kcopyd will try to proceed regardless of errors and try to continue copying any remaining amount. Since dm-raid1 tracks regions of the address space that are (or are not) in sync and it now has the ability to handle these errors, we can safely enable this optimization. This optimization is conditional on whether mirror error handling has been enabled. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2008-10-10dm mpath: remove is_active from struct dm_pathKiyoshi Ueda
This patch moves 'is_active' from struct dm_path to struct pgpath as it does not need exporting. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2008-10-10dm mpath: use more error codesBenjamin Marzinski
This patch allows path errors from the multipath ctr function to propagate up to userspace as errno values from the ioctl() call. This is in response to https://www.redhat.com/archives/dm-devel/2008-May/msg00000.html and https://bugzilla.redhat.com/show_bug.cgi?id=444421 The patch only lets through the errors that it needs to in order to get the path errors from parse_path(). Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2008-10-10doc/cdrom: Trvial documentation error, file not presentRandy Dunlap
The sbpcd tester program is not included in the kernel source tree, so remove the reference to it. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Reported-by: Nick Warne <nick@ukfsn.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-10Merge branches 'cma', 'cxgb3', 'ehca', 'ipath', 'ipoib', 'mad', 'misc', ↵Roland Dreier
'mlx4', 'mthca' and 'nes' into for-next
2008-10-10RDMA/nes: Fix slab corruptionChien Tung
Referencing cm_node after it is freed via rem_ref_cm_node() causes a slab corruption. There is no need to set cm_node->cm_id to NULL in mini_cm_close(). Signed-off-by: Chien Tung <ctung@neteffect.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-10-10Merge branch 'next' into for-linusJames Morris
2008-10-09Linux 2.6.27Linus Torvalds
2008-10-09Don't allow splice() to files opened with O_APPENDLinus Torvalds
This is debatable, but while we're debating it, let's disallow the combination of splice and an O_APPEND destination. It's not entirely clear what the semantics of O_APPEND should be, and POSIX apparently expects pwrite() to ignore O_APPEND, for example. So we could make up any semantics we want, including the old ones. But Miklos convinced me that we should at least give it some thought, and that accepting writes at arbitrary offsets is wrong at least for IS_APPEND() files (which always have O_APPEND set, even if the reverse isn't true: you can obviously have O_APPEND set on a regular file). So disallow O_APPEND entirely for now. I doubt anybody cares, and this way we have one less gray area to worry about. Reported-and-argued-for-by: Miklos Szeredi <miklos@szeredi.hu> Acked-by: Jens Axboe <ens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-09Merge branch 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6Linus Torvalds
* 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: hwmon: (abituguru3) Enable DMI probing feature on Abit AT8 32X hwmon: (abituguru3) Enable reading from AUX3 fan on Abit AT8 32X hwmon: (adt7473) Fix some bogosity in documentation file hwmon: Define sysfs interface for energy consumption register hwmon: (it87) Prevent power-off on Shuttle SN68PT eeepc-laptop: Fix hwmon interface
2008-10-09Merge branch 'fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] correct broken links and email addresses
2008-10-09SLOB: fix bogus ksize calculation fixMatt Mackall
This fixes the previous fix, which was completely wrong on closer inspection. This version has been manually tested with a user-space test harness and generates sane values. A nearly identical patch has been boot-tested. The problem arose from changing how kmalloc/kfree handled alignment padding without updating ksize to match. This brings it in sync. Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-09[CPUFREQ] correct broken links and email addressesNémeth Márton
Replace the no longer working links and email address in the documentation and in source code. Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Dave Jones <davej@redhat.com>
2008-10-09sched debug: add name to sched_domain sysctl entriesIngo Molnar
add /proc/sys/kernel/sched_domain/cpu0/domain0/name, to make it easier to see which specific scheduler domain remained at that entry. Since we process the scheduler domain tree and simplify it, it's not always immediately clear during debugging which domain came from where. depends on CONFIG_SCHED_DEBUG=y. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-09hwmon: (abituguru3) Enable DMI probing feature on Abit AT8 32XAlistair John Strachan
Enable driver checking of the DMI product name (when enabled) on an Abit AT8 32X, instead of falling back to a manual probe. This eliminates false negatives and eventually will help avoid unnecessary bus probes on unsupported mainboards. Signed-off-by: Alistair John Strachan <alistair@devzero.co.uk> Tested-by: Daniel Exner <dex@dragonslave.de> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-10-09hwmon: (abituguru3) Enable reading from AUX3 fan on Abit AT8 32XAlistair John Strachan
The table for the Abit AT8 32X was incorrectly missing an entry for the sixth ("AUX3") fan. Add this entry, exporting the fan reading to userspace. Closes lm-sensors.org ticket #2339. Signed-off-by: Alistair John Strachan <alistair@devzero.co.uk> Tested-by: Daniel Exner <dex@dragonslave.de> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-10-09hwmon: (adt7473) Fix some bogosity in documentation fileDarrick J. Wong
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-10-09hwmon: Define sysfs interface for energy consumption registerDarrick J. Wong
Describe the sysfs files that were introduced in the ibmaem driver. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-10-09hwmon: (it87) Prevent power-off on Shuttle SN68PTJean Delvare
On the Shuttle SN68PT, FAN_CTL2 is apparently not connected to a fan, but to something else. One user has reported instant system power-off when changing the PWM2 duty cycle, so we disable it. I use the board name string as the trigger in case the same board is ever used in other systems. This closes lm-sensors ticket #2349: pwmconfig causes a hard poweroff http://www.lm-sensors.org/ticket/2349 Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-10-09eeepc-laptop: Fix hwmon interfaceCorentin Chary
Creates a name file in the sysfs directory, that is needed for the libsensors library to work. Also rename fan1_pwm to pwm1 and scale its value as needed. This fixes bug #11520: http://bugzilla.kernel.org/show_bug.cgi?id=11520 Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-10-09block_dev: fix kernel-doc in new functionsRandy Dunlap
Fix kernel-doc in new functions: Error(mmotm-2008-1002-1617//fs/block_dev.c:895): duplicate section name 'Description' Error(mmotm-2008-1002-1617//fs/block_dev.c:924): duplicate section name 'Description' Warning(mmotm-2008-1002-1617//fs/block_dev.c:1282): No description found for parameter 'pathname' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> cc: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: add some comments around the bio read-write flagsJens Axboe
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: mark bio_split_pool staticDenis ChengRq
Since all bio_split calls refer the same single bio_split_pool, the bio_split function can use bio_split_pool directly instead of the mempool_t parameter; then the mempool_t parameter can be removed from bio_split param list, and bio_split_pool is only referred in fs/bio.c file, can be marked static. Signed-off-by: Denis ChengRq <crquan@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: Find bio sector offset given idx and offsetMartin K. Petersen
Helper function to find the sector offset in a bio given bvec index and page offset. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: gendisk integrity wrapperMartin K. Petersen
This is a wrapper for accessing a gendisk's integrity bits. It allows the integrity support in MD to be compiled with BLK_DEV_INTEGRITY off. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: Switch blk_integrity_compare from bdev to gendiskMartin K. Petersen
The DM and MD integrity support now depends on being able to use gendisks instead of block_devices when comparing integrity profiles. Change function parameters accordingly. Also update comparison logic so that two NULL profiles are a valid configuration. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: Fix double put in blk_integrity_unregisterMartin K. Petersen
- kobject_del already puts the parent. - Set integrity profile to NULL to prevent stale data. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: Introduce integrity data ownership flagMartin K. Petersen
A filesystem might supply its own integrity metadata. Introduce a flag that indicates whether the filesystem or the block layer owns the integrity buffer. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: revert part of d7533ad0e132f92e75c1b2eb7c26387b25a583c1Jens Axboe
We need bdev_get_integrity() to support the pending md/dm patches. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09bio.h: Remove unused conditional codeAlberto Bertogli
The whole bio_integrity() definition is inside an #ifdef CONFIG_BLK_DEV_INTEGRITY, there's no need for the conditional code. Signed-off-by: Alberto Bertogli <albertito@blitiri.com.ar> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: remove end_{queued|dequeued}_request()Kiyoshi Ueda
This patch removes end_queued_request() and end_dequeued_request(), which are no longer used. As a results, users of __end_request() became only end_request(). So the actual code in __end_request() is moved to end_request() and __end_request() is removed. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: change elevator to use __blk_end_request()Kiyoshi Ueda
This patch converts elevator to use __blk_end_request() directly so that end_{queued|dequeued}_request() can be removed. Related 'uptodate' arguments is converted to 'error'. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09gdrom: change to use __blk_end_request()Kiyoshi Ueda
This patch converts gdrom to use __blk_end_request() directly so that end_{queued|dequeued}_request() can be removed. gd.transfer is '1' in error cases and '0' in non-error cases, so gdrom hasn't been propagating any error code to the block layer. We can just convert error cases to '-EIO'. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Cc: Adrian McMenamin <adrian@mcmen.demon.co.uk> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09memstick: change to use __blk_end_request()Kiyoshi Ueda
This patch converts memstick to use __blk_end_request() directly so that end_{queued|dequeued}_request() can be removed. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Cc: Alex Dubov <oakad@yahoo.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09virtio_blk: change to use __blk_end_request()Kiyoshi Ueda
This patch converts virtio_blk to use __blk_end_request() directly so that end_{queued|dequeued}_request() can be removed. Related 'uptodate' argument is converted to 'error'. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09blktrace: use BLKTRACE_BDEV_SIZE as the name size for setup structureJens Axboe
Define as 32, which is is what BDEVNAME_SIZE is/was as well. This keeps the user interface the same and gets rid of the difference between kernel and user api here. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: add lld busy state exporting interfaceKiyoshi Ueda
This patch adds an new interface, blk_lld_busy(), to check lld's busy state from the block layer. blk_lld_busy() calls down into low-level drivers for the checking if the drivers set q->lld_busy_fn() using blk_queue_lld_busy(). This resolves a performance problem on request stacking devices below. Some drivers like scsi mid layer stop dispatching request when they detect busy state on its low-level device like host/target/device. It allows other requests to stay in the I/O scheduler's queue for a chance of merging. Request stacking drivers like request-based dm should follow the same logic. However, there is no generic interface for the stacked device to check if the underlying device(s) are busy. If the request stacking driver dispatches and submits requests to the busy underlying device, the requests will stay in the underlying device's queue without a chance of merging. This causes performance problem on burst I/O load. With this patch, busy state of the underlying device is exported via q->lld_busy_fn(). So the request stacking driver can check it and stop dispatching requests if busy. The underlying device driver must return the busy state appropriately: 1: when the device driver can't process requests immediately. 0: when the device driver can process requests immediately, including abnormal situations where the device driver needs to kill all requests. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: Fix blk_start_queueing() to not kick a stopped queueElias Oltmanns
blk_start_queueing() should act like the generic queue unplugging and kicking and ignore a stopped queue. Such a queue may not be run until after a call to blk_start_queue(). Signed-off-by: Elias Oltmanns <eo@nebensachen.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09include blktrace_api.h in headers_installSven Schuetz
This header file is of interest for user space programming, i.e. for tools that process blktrace data. We would like to use it for a tool on-top of blktrace which processes data provided by blktrace. For this purpose, it would be helpful if the blktrace API would make it to /usr/include/linux. The git tree for the blktrace tools comes with its own copy of this header file. I didn't manage to replace that copy with the file generated by the patch below yet. A few more cleanups would be needed. For example, the blktrace ioctl numbers, which are currently defined in usr/include/fs.h, might need to be moved. Should be feasible, though. Signed-off-by: Sven Schuetz <sven@linux.vnet.ibm.com> Signed-off-by: Martin Peschke <mp3@de.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: reserve some tags just for sync IOJens Axboe
By only allowing async IO to consume 3/4 ths of the tag depth, we always have slots free to serve sync IO. This is important to avoid having writes fill the entire tag queue, thus starving reads. Original patch and idea from Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: as/cfq ssd idle check updateJens Axboe
We really need to know about the hardware tagging support as well, since if the SSD does not do tagging then we still want to idle. Otherwise have the same dependent sync IO vs flooding async IO problem as on rotational media. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09libata: set queue SSD flag for SSD devicesJens Axboe
SSD devices should give an RPM setting of 1 in word 217 of the ID page. If we see such a device, tell the block layer about it. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: add queue flag for SSD/non-rotational devicesJens Axboe
We don't want to idle in AS/CFQ if the device doesn't have a seek penalty. So add a QUEUE_FLAG_NONROT to indicate a non-rotational device, low level drivers should set this flag upon discovery of an SSD or similar device type. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09floppy: support arbitrary first-sector numbersKeith Wansbrough
The current floppy_struct allows floppies to number sectors starting from 0 or 1. This patch allows arbitrary first-sector numbers - for example, 0xC1 for Amstrad CPC disks. This extends the existing 1-bit field (FD_ZEROBASED, bit 2 of stretch) to 8 bits (FD_SECTMASK, bits 2 to 9). Currently 0x00 denotes a first sector number of 1, and 0x01 denotes a first sector number of 0. We extend this by interpreting FD_SECTMASK as the first sector number with the LSB flipped. Signed-off-by: Keith Wansbrough <keith@lochan.org> Cc: Alain Knaff <alain@linux.lu> Cc: Michael Kerrisk <mtk.manpages@googlemail.com> Cc: Karel Zak <kzak@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09drivers/block: Use DIV_ROUND_UPJulia Lawall
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ #include <linux/kernel.h> @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: <mike.miller@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09cciss: Fix cciss SCSI rescan code to better notice device changesscameron@beardog.cca.cpqcorp.net
Fix cciss SCSI rescan code to better notice device changes. If you hot-unplug a tape drive, then hot-plug a different tape drive into the same slot in a storage enclosure, the cciss driver wouldn't notice anything had changed, as it was only looking at the LUN address and device type. Now it looks at the inquiry page 0x83 device identifier, and vendor and model strings as well. Signed-off-by: Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09fix an example of scatterlists handling in DMA-API.txtFUJITA Tomonori
This example isn't the proper way to handle scatterlists (can't handle sg chaining). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: add a queue flag for request stacking supportKiyoshi Ueda
This patch adds a queue flag to indicate the block device can be used for request stacking. Request stacking drivers need to stack their devices on top of only devices of which q->request_fn is functional. Since bio stacking drivers (e.g. md, loop) basically initialize their queue using blk_alloc_queue() and don't set q->request_fn, the check of (q->request_fn == NULL) looks enough for that purpose. However, dm will become both types of stacking driver (bio-based and request-based). And dm will always set q->request_fn even if the dm device is bio-based of which q->request_fn is not functional actually. So we need something else to distinguish the type of the device. Adding a queue flag is a solution for that. The reason why dm always sets q->request_fn is to keep the compatibility of dm user-space tools. Currently, all dm user-space tools are using bio-based dm without specifying the type of the dm device they use. To use request-based dm without changing such tools, the kernel must decide the type of the dm device automatically. The automatic type decision can't be done at the device creation time and needs to be deferred until such tools load a mapping table, since the actual type is decided by dm target type included in the mapping table. So a dm device has to be initialized using blk_init_queue() so that we can load either type of table. Then, all queue stuffs are set (e.g. q->request_fn) and we have no element to distinguish that it is bio-based or request-based, even after a table is loaded and the type of the device is decided. By the way, some stuffs of the queue (e.g. request_list, elevator) are needless when the dm device is used as bio-based. But the memory size is not so large (about 20[KB] per queue on ia64), so I hope the memory loss can be acceptable for bio-based dm users. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>