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* [S390] dasd: use correct label location for diag fba disksPeter Oberparleiter2010-07-19
| | | | | | | | | | | | | | | | | | | | | Partition boundary calculation fails for DASD FBA disks under the following conditions: - disk is formatted with CMS FORMAT with a blocksize of more than 512 bytes - all of the disk is reserved to a single CMS file using CMS RESERVE - the disk is accessed using the DIAG mode of the DASD driver Under these circumstances, the partition detection code tries to read the CMS label block containing partition-relevant information from logical block offset 1, while it is in fact located at physical block offset 1. Fix this problem by using the correct CMS label block location depending on the device type as determined by the DASD SENSE ID information. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* fs: ldm: don't use own implementation of hex_to_bin()Andy Shevchenko2010-05-25
| | | | | | | | | Remove own implementation of hex_to_bin(). Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: "Richard Russon (FlatCap)" <ldm@flatcap.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-05-21
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (69 commits) fix handling of offsets in cris eeprom.c, get rid of fake on-stack files get rid of home-grown mutex in cris eeprom.c switch ecryptfs_write() to struct inode *, kill on-stack fake files switch ecryptfs_get_locked_page() to struct inode * simplify access to ecryptfs inodes in ->readpage() and friends AFS: Don't put struct file on the stack Ban ecryptfs over ecryptfs logfs: replace inode uid,gid,mode initialization with helper function ufs: replace inode uid,gid,mode initialization with helper function udf: replace inode uid,gid,mode init with helper ubifs: replace inode uid,gid,mode initialization with helper function sysv: replace inode uid,gid,mode initialization with helper function reiserfs: replace inode uid,gid,mode initialization with helper function ramfs: replace inode uid,gid,mode initialization with helper function omfs: replace inode uid,gid,mode initialization with helper function bfs: replace inode uid,gid,mode initialization with helper function ocfs2: replace inode uid,gid,mode initialization with helper function nilfs2: replace inode uid,gid,mode initialization with helper function minix: replace inode uid,gid,mode init with helper ext4: replace inode uid,gid,mode init with helper ... Trivial conflict in fs/fs-writeback.c (mark bitfields unsigned)
| * fs/partitions: use ADDPART_FLAG_RAID instead of magic numberCesar Eduardo Barros2010-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ADDPART_FLAG_RAID was introduced in commit d18d768, and most places were converted to use it instead of a hardcoded value. However, some places seem to have been missed. Change all of them to the symbolic names via the following semantic patch: @@ struct parsed_partitions *state; expression E; @@ ( - state->parts[E].flags = 1 + state->parts[E].flags = ADDPART_FLAG_RAID | - state->parts[E].flags |= 1 + state->parts[E].flags |= ADDPART_FLAG_RAID | - state->parts[E].flags = 2 + state->parts[E].flags = ADDPART_FLAG_WHOLEDISK | - state->parts[E].flags |= 2 + state->parts[E].flags |= ADDPART_FLAG_WHOLEDISK ) Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | block: improve automatic native capacity unlockingTejun Heo2010-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, native capacity unlocking is initiated only when a recognized partition extends beyond the end of the disk. However, there are several other unhandled cases where truncated capacity can lead to misdetection of partitions. * Partition table is fully beyond EOD. * Partition table is partially beyond EOD (daisy chained ones). * Recognized partition starts beyond EOD. This patch updates generic partition check code such that all the above three cases are handled too. For the first two, @state tracks whether low level partition check code tried to read beyond EOD during partition scan and triggers native capacity unlocking accordingly. The third is now handled similarly to the original unlocking case. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ben Hutchings <ben@decadent.org.uk> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | block: use struct parsed_partitions *state universally in partition check codeTejun Heo2010-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the following changes to partition check code. * Add ->bdev to struct parsed_partitions. * Introduce read_part_sector() which is a simple wrapper around read_dev_sector() which takes struct parsed_partitions *state instead of @bdev. * For functions which used to take @state and @bdev, drop @bdev. For functions which used to take @bdev, replace it with @state. * While updating, drop superflous checks on NULL state/bdev in ldm.c. This cleans up the API a bit and enables better handling of IO errors during partition check as the generic partition check code now has much better visibility into what went wrong in the low level code paths. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ben Hutchings <ben@decadent.org.uk> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | block,ide: simplify bdops->set_capacity() to ->unlock_native_capacity()Tejun Heo2010-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | bdops->set_capacity() is unnecessarily generic. All that's required is a simple one way notification to lower level driver telling it to try to unlock native capacity. There's no reason to pass in target capacity or return the new capacity. The former is always the inherent native capacity and the latter can be handled via the usual device resize / revalidation path. In fact, the current API is always used that way. Replace ->set_capacity() with ->unlock_native_capacity() which take only @disk and doesn't return anything. IDE which is the only current user of the API is converted accordingly. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | block: restart partition scan after resizing a deviceTejun Heo2010-05-21
|/ | | | | | | | | | | | | | Device resize via ->set_capacity() can reveal new partitions (e.g. in chained partition table formats such as dos extended parts). Restart partition scan from the beginning after resizing a device. This change also makes libata always revalidate the disk after resize which makes lower layer native capacity unlocking implementation simpler and more robust as resize can be handled in the usual path. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Ben Hutchings <ben@decadent.org.uk> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* fs/partition/msdos: fix unusable extended partition for > 512B sectorOGAWA Hirofumi2010-03-24
| | | | | | | | | | | | | | | Smaller size than a minimum blocksize can't be used, after all it's handled like 0 size. For extended partition itself, this makes sure to use bigger size than one logical sector size at least. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Daniel Taylor <Daniel.Taylor@wdc.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/partitions/msdos: add support for large disksDaniel Taylor2010-03-24
| | | | | | | | | | | | | | | | | | | | | | In order to use disks larger than 2TiB on Windows XP, it is necessary to use 4096-byte logical sectors in an MBR. Although the kernel storage and functions called from msdos.c used "sector_t" internally, msdos.c still used u32 variables, which results in the ability to handle XP-compatible large disks. This patch changes the internal variables to "sector_t". Daniel said: "In the near future, WD will be releasing products that need this patch". [hirofumi@mail.parknet.co.jp: tweaks and fix] Signed-off-by: Daniel Taylor <daniel.taylor@wdc.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* block: Stop using byte offsetsMartin K. Petersen2010-01-11
| | | | | | | | | All callers of the stacking functions use 512-byte sector units rather than byte offsets. Simplify the code so the stacking functions take sectors when specifying data offsets. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* partitions: read whole sector with EFI GPT headerKarel Zak2009-11-23
| | | | | | | | | | | | | | | | | The size of EFI GPT header is not static, but whole sector is allocated for the header. The HeaderSize field must be greater than 92 (= sizeof(struct gpt_header) and must be less than or equal to the logical block size. It means we have to read whole sector with the header, because the header crc32 checksum is calculated according to HeaderSize. For more details see UEFI standard (version 2.3, May 2009): - 5.3.1 GUID Format overview, page 93 - Table 13. GUID Partition Table Header, page 96 Signed-off-by: Karel Zak <kzak@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* partitions: use sector size for EFI GPTKarel Zak2009-11-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, kernel uses strictly 512-byte sectors for EFI GPT parsing. That's wrong. UEFI standard (version 2.3, May 2009, 5.3.1 GUID Format overview, page 95) defines that LBA is always based on the logical block size. It means bdev_logical_block_size() (aka BLKSSZGET) for Linux. This patch removes static sector size from EFI GPT parser. The problem is reproducible with the latest GNU Parted: # modprobe scsi_debug dev_size_mb=50 sector_size=4096 # ./parted /dev/sdb print Model: Linux scsi_debug (scsi) Disk /dev/sdb: 52.4MB Sector size (logical/physical): 4096B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 24.6kB 3002kB 2978kB primary 2 3002kB 6001kB 2998kB primary 3 6001kB 9003kB 3002kB primary # blockdev --rereadpt /dev/sdb # dmesg | tail -1 sdb: unknown partition table <---- !!! with this patch: # blockdev --rereadpt /dev/sdb # dmesg | tail -1 sdb: sdb1 sdb2 sdb3 Signed-off-by: Karel Zak <kzak@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: Expose discard granularityMartin K. Petersen2009-11-10
| | | | | | | | | | While SSDs track block usage on a per-sector basis, RAID arrays often have allocation blocks that are bigger. Allow the discard granularity and alignment to be set and teach the topology stacking logic how to handle them. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: Seperate read and write statistics of in_flight requests v2Nikanth Karthikesan2009-10-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a9327cac440be4d8333bba975cbbf76045096275 added seperate read and write statistics of in_flight requests. And exported the number of read and write requests in progress seperately through sysfs. But Corrado Zoccolo <czoccolo@gmail.com> reported getting strange output from "iostat -kx 2". Global values for service time and utilization were garbage. For interval values, utilization was always 100%, and service time is higher than normal. So this was reverted by commit 0f78ab9899e9d6acb09d5465def618704255963b The problem was in part_round_stats_single(), I missed the following: if (now == part->stamp) return; - if (part->in_flight) { + if (part_in_flight(part)) { __part_stat_add(cpu, part, time_in_queue, part_in_flight(part) * (now - part->stamp)); __part_stat_add(cpu, part, io_ticks, (now - part->stamp)); With this chunk included, the reported regression gets fixed. Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> -- Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Revert "Seperate read and write statistics of in_flight requests"Jens Axboe2009-10-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit a9327cac440be4d8333bba975cbbf76045096275. Corrado Zoccolo <czoccolo@gmail.com> reports: "with 2.6.32-rc1 I started getting the following strange output from "iostat -kx 2": Linux 2.6.31bisect (et2) 04/10/2009 _i686_ (2 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 10,70 0,00 3,16 15,75 0,00 70,38 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 18,22 0,00 0,67 0,01 14,77 0,02 43,94 0,01 10,53 39043915,03 2629219,87 sdb 60,89 9,68 50,79 3,04 1724,43 50,52 65,95 0,70 13,06 488437,47 2629219,87 avg-cpu: %user %nice %system %iowait %steal %idle 2,72 0,00 0,74 0,00 0,00 96,53 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 sdb 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 avg-cpu: %user %nice %system %iowait %steal %idle 6,68 0,00 0,99 0,00 0,00 92,33 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 sdb 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 avg-cpu: %user %nice %system %iowait %steal %idle 4,40 0,00 0,73 1,47 0,00 93,40 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 sdb 0,00 4,00 0,00 3,00 0,00 28,00 18,67 0,06 19,50 333,33 100,00 Global values for service time and utilization are garbage. For interval values, utilization is always 100%, and service time is higher than normal. I bisected it down to: [a9327cac440be4d8333bba975cbbf76045096275] Seperate read and write statistics of in_flight requests and verified that reverting just that commit indeed solves the issue on 2.6.32-rc1." So until this is debugged, revert the bad commit. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* const: make block_device_operations constAlexey Dobriyan2009-09-22
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* driver model: constify attribute groupsDavid Brownell2009-09-15
| | | | | | | | | | Let attribute group vectors be declared "const". We'd like to let most attribute metadata live in read-only sections... this is a start. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Seperate read and write statistics of in_flight requestsNikanth Karthikesan2009-09-14
| | | | | | | | | | | | | Currently, there is a single in_flight counter measuring the number of requests in the request_queue. But some monitoring tools would like to know how many read requests and write requests are in progress. Split the current in_flight counter into two seperate counters for read and write. This information is exported as a sysfs attribute, as changing the currently available stat files would break the existing tools. Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* partitions: fix broken uevent_suppress conversionHeiko Carstens2009-07-12
| | | | | | | | | | | | | | | | | | | | | git commit f67f129e "Driver core: implement uevent suppress in kobject" contains this chunk for fs/partitions/check.c: /* suppress uevent if the disk supresses it */ - if (!ddev->uevent_suppress) + if (!dev_get_uevent_suppress(pdev)) kobject_uevent(&pdev->kobj, KOBJ_ADD); However that should have been - if (!ddev->uevent_suppress) + if (!dev_get_uevent_suppress(ddev)) Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Ming Lei <tom.leiming@gmail.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Merge branch 'for-2.6.31' of ↵Linus Torvalds2009-06-12
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6 * 'for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (29 commits) ide: re-implement ide_pci_init_one() on top of ide_pci_init_two() ide: unexport ide_find_dma_mode() ide: fix PowerMac bootup oops ide: skip probe if there are no devices on the port (v2) sl82c105: add printk() logging facility ide-tape: fix proc warning ide: add IDE_DFLAG_NIEN_QUIRK device flag ide: respect quirk_drives[] list on all controllers hpt366: enable all quirks for devices on quirk_drives[] list hpt366: sync quirk_drives[] list with pdc202xx_{new,old}.c ide: remove superfluous SELECT_MASK() call from do_rw_taskfile() ide: remove superfluous SELECT_MASK() call from ide_driveid_update() icside: remove superfluous ->maskproc method ide-tape: fix IDE_AFLAG_* atomic accesses ide-tape: change IDE_AFLAG_IGNORE_DSC non-atomically pdc202xx_old: kill resetproc() method pdc202xx_old: don't call pdc202xx_reset() on IRQ timeout pdc202xx_old: use ide_dma_test_irq() ide: preserve Host Protected Area by default (v2) ide-gd: implement block device ->set_capacity method (v2) ...
| * partitions: add ->set_capacity block device methodBartlomiej Zolnierkiewicz2009-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Add ->set_capacity block device method and use it in rescan_partitions() to attempt enabling native capacity of the device upon detecting the partition which exceeds device capacity. * Add GENHD_FL_NATIVE_CAPACITY flag to try limit attempts of enabling native capacity during partition scan. Together with the consecutive patch implementing ->set_capacity method in ide-gd device driver this allows automatic disabling of Host Protected Area (HPA) if any partitions overlapping HPA are detected. Cc: Robert Hancock <hancockrwd@gmail.com> Cc: Frans Pop <elendil@planet.nl> Cc: "Andries E. Brouwer" <Andries.Brouwer@cwi.nl> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Emphatically-Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * partitions: warn about the partition exceeding device capacityBartlomiej Zolnierkiewicz2009-06-07
| | | | | | | | | | | | | | | | | | | | | | | | The current warning message says only about the kernel's action taken without mentioning the underlying reason behind it. Noticed-by: Robert Hancock <hancockrwd@gmail.com> Cc: Frans Pop <elendil@planet.nl> Cc: "Andries E. Brouwer" <Andries.Brouwer@cwi.nl> Cc: Al Viro <viro@zeniv.linux.org.uk> Emphatically-Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* | block: Export I/O topology for block devices and partitionsMartin K. Petersen2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To support devices with physical block sizes bigger than 512 bytes we need to ensure proper alignment. This patch adds support for exposing I/O topology characteristics as devices are stacked. logical_block_size is the smallest unit the device can address. physical_block_size indicates the smallest I/O the device can write without incurring a read-modify-write penalty. The io_min parameter is the smallest preferred I/O size reported by the device. In many cases this is the same as the physical block size. However, the io_min parameter can be scaled up when stacking (RAID5 chunk size > physical block size). The io_opt characteristic indicates the optimal I/O size reported by the device. This is usually the stripe width for arrays. The alignment_offset parameter indicates the number of bytes the start of the device/partition is offset from the device's natural alignment. Partition tools and MD/DM utilities can use this to pad their offsets so filesystems start on proper boundaries. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | block: Do away with the notion of hardsect_sizeMartin K. Petersen2009-05-22
|/ | | | | | | | | | | | | | Until now we have had a 1:1 mapping between storage device physical block size and the logical block sized used when addressing the device. With SATA 4KB drives coming out that will no longer be the case. The sector size will be 4KB but the logical block size will remain 512-bytes. Hence we need to distinguish between the physical block size and the logical ditto. This patch renames hardsect_size to logical_block_size. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Merge branch 'tracing/core-v2' into tracing-for-linusIngo Molnar2009-04-01
|\ | | | | | | | | | | | | | | Conflicts: include/linux/slub_def.h lib/Kconfig.debug mm/slob.c mm/slub.c
| * tracing/blktrace: fix up checkpatch reported problems in ftrace plugin patchArnaldo Carvalho de Melo2009-01-26
| | | | | | | | | | | | | | | | Also make sure sparse (make C=2 block/blktrace.o) is happy too. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * blktrace: add ftrace pluginArnaldo Carvalho de Melo2009-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: New way of using the blktrace infrastructure This drops the requirement of userspace utilities to use the blktrace facility. Configuration is done thru sysfs, adding a "trace" directory to the partition directory where blktrace can be enabled for the associated request_queue. The same filters present in the IOCTL interface are present as sysfs device attributes. The /sys/block/sdX/sdXN/trace/enable file allows tracing without any filters. The other files in this directory: pid, act_mask, start_lba and end_lba can be used with the same meaning as with the IOCTL interface. Using the sysfs interface will only setup the request_queue->blk_trace fields, tracing will only take place when the "blk" tracer is selected via the ftrace interface, as in the following example: To see the trace, one can use the /d/tracing/trace file or the /d/tracign/trace_pipe file, with semantics defined in the ftrace documentation in Documentation/ftrace.txt. [root@f10-1 ~]# cat /t/trace kjournald-305 [000] 3046.491224: 8,1 A WBS 6367 + 8 <- (8,1) 6304 kjournald-305 [000] 3046.491227: 8,1 Q R 6367 + 8 [kjournald] kjournald-305 [000] 3046.491236: 8,1 G RB 6367 + 8 [kjournald] kjournald-305 [000] 3046.491239: 8,1 P NS [kjournald] kjournald-305 [000] 3046.491242: 8,1 I RBS 6367 + 8 [kjournald] kjournald-305 [000] 3046.491251: 8,1 D WB 6367 + 8 [kjournald] kjournald-305 [000] 3046.491610: 8,1 U WS [kjournald] 1 <idle>-0 [000] 3046.511914: 8,1 C RS 6367 + 8 [6367] [root@f10-1 ~]# The default line context (prefix) format is the one described in the ftrace documentation, with the blktrace specific bits using its existing format, described in blkparse(8). If one wants to have the classic blktrace formatting, this is possible by using: [root@f10-1 ~]# echo blk_classic > /t/trace_options [root@f10-1 ~]# cat /t/trace 8,1 0 3046.491224 305 A WBS 6367 + 8 <- (8,1) 6304 8,1 0 3046.491227 305 Q R 6367 + 8 [kjournald] 8,1 0 3046.491236 305 G RB 6367 + 8 [kjournald] 8,1 0 3046.491239 305 P NS [kjournald] 8,1 0 3046.491242 305 I RBS 6367 + 8 [kjournald] 8,1 0 3046.491251 305 D WB 6367 + 8 [kjournald] 8,1 0 3046.491610 305 U WS [kjournald] 1 8,1 0 3046.511914 0 C RS 6367 + 8 [6367] [root@f10-1 ~]# Using the ftrace standard format allows more flexibility, such as the ability of asking for backtraces via trace_options: [root@f10-1 ~]# echo noblk_classic > /t/trace_options [root@f10-1 ~]# echo stacktrace > /t/trace_options [root@f10-1 ~]# cat /t/trace kjournald-305 [000] 3318.826779: 8,1 A WBS 6375 + 8 <- (8,1) 6312 kjournald-305 [000] 3318.826782: <= submit_bio <= submit_bh <= sync_dirty_buffer <= journal_commit_transaction <= kjournald <= kthread <= child_rip kjournald-305 [000] 3318.826836: 8,1 Q R 6375 + 8 [kjournald] kjournald-305 [000] 3318.826837: <= generic_make_request <= submit_bio <= submit_bh <= sync_dirty_buffer <= journal_commit_transaction <= kjournald <= kthread Please read the ftrace documentation to use aditional, standardized tracing filters such as /d/tracing/trace_cpumask, etc. See also /d/tracing/trace_mark to add comments in the trace stream, that is equivalent to the /d/block/sdaN/msg interface. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds2009-03-26
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (81 commits) [S390] remove duplicated #includes [S390] cpumask: use mm_cpumask() wrapper [S390] cpumask: Use accessors code. [S390] cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits. [S390] cpumask: remove cpu_coregroup_map [S390] fix clock comparator save area usage [S390] Add hwcap flag for the etf3 enhancement facility [S390] Ensure that ipl panic notifier is called late. [S390] fix dfp elf hwcap/facility bit detection [S390] smp: perform initial cpu reset before starting a cpu [S390] smp: fix memory leak on __cpu_up [S390] ipl: Improve checking logic and remove switch defaults. [S390] s390dbf: Remove needless check for NULL pointer. [S390] s390dbf: Remove redundant initilizations. [S390] use kzfree() [S390] BUG to BUG_ON changes [S390] zfcpdump: Prevent zcore from beeing built as a kernel module. [S390] Use csum_partial in checksum.h [S390] cleanup lowcore.h [S390] eliminate ipl_device from lowcore ...
| * | [S390] dasd: add large volume supportStefan Weinhuber2009-03-26
| |/ | | | | | | | | | | | | | | | | | | | | | | | | The dasd device driver will now support ECKD devices with more then 65520 cylinders. In the traditional ECKD adressing scheme each track is addressed by a 16-bit cylinder and 16-bit head number. The new addressing scheme makes use of the fact that the actual number of heads is never larger then 15, so 12 bits of the head number can be redefined to be part of the cylinder address. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* / Driver core: implement uevent suppress in kobjectMing Lei2009-03-24
|/ | | | | | | | | | | | | | | | | | | | | | | This patch implements uevent suppress in kobject and removes it from struct device, based on the following ideas: 1,Uevent sending should be one attribute of kobject, so suppressing it in kobject layer is more natural than in device layer. By this way, we can do it for other objects embedded with kobject. 2,It may save several bytes for each instance of struct device.(On my omap3(32bit ARM) based box, can save 8bytes per device object) This patch also introduces dev_set|get_uevent_suppress() helpers to set and query uevent_suppress attribute in case to help kobject as private part of struct device in future. [This version is against the latest driver-core patch set of Greg,please ignore the last version.] Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* block: fix bug in ptbl lookup cacheNeil Brown2009-01-09
| | | | | | | | | | | | | | | | | | | | | | | | Neil writes: Hi Jens, I've found a little bug for you. It was introduced by a6f23657d3072bde6844055bbc2290e497f33fbc block: add one-hit cache for disk partition lookup and has the effect of killing my machine whenever I try to assemble an md array :-( One of the devices in the array has partitions, and mdadm always deletes partitions before putting a whole-device in an array (as it can cause confusion). The next IO to that device locks the machine. I don't really understand exactly why it locks up, but it happens in disk_map_sector_rcu(). This patch fixes it. Which is due to a missing clear of the (now) stale partition lookup data. So clear that when we delete a partition. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers2009-01-06
| | | | | | Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* block/md: fix md autodetectionTejun Heo2008-11-18
| | | | | | | | | | Block ext devt conversion missed md_autodetect_dev() call in rescan_partitions() leaving md autodetect unable to see partitions. Fix it. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: make add_partition() return pointer to hd_structTejun Heo2008-11-18
| | | | | | | | | | Make add_partition() return pointer to the new hd_struct on success and ERR_PTR() value on failure. This change will be used to fix md autodetection bug. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: fix add_partition() error pathTejun Heo2008-11-18
| | | | | | | | Partition stats structure was not freed on devt allocation failure path. Fix it. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [PATCH] sanitize blkdev_get() and friendsAl Viro2008-10-21
| | | | | | | | * get rid of fake struct file/struct dentry in __blkdev_get() * merge __blkdev_get() and do_open() * get rid of flags argument of blkdev_get() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] pass fmode_t to blkdev_put()Al Viro2008-10-21
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* block: add partition attribute for partition numberTejun Heo2008-10-17
| | | | | | | | | | | | | | | | | With extended devt, finding out the partition number becomes a bit more challenging as subtracting the minor number from that of the parent device doesn't work anymore. The only thing left is parsing the partition name which is brittle and not exactly universal (some have '-' between the device name and partition number while others don't). This patch introduced partition attribute which contains the partition number of the device. This should make finding partitions and its index easier. This problem and solution were suggested by H. Peter Anvin. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: sanitize invalid partition table entriesKay Sievers2008-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We currently follow blindly what the partition table lies about the disk, and let the kernel create block devices which can not be accessed. Trying to identify the device leads to kernel logs full of: sdb: rw=0, want=73392, limit=28800 attempt to access beyond end of device Here is an example of a broken partition table, where sda2 starts behind the end of the disk, and sdb3 is larger than the entire disk: Disk /dev/sdb: 14 MB, 14745600 bytes 1 heads, 29 sectors/track, 993 cylinders, total 28800 sectors Device Boot Start End Blocks Id System /dev/sdb1 29 7800 3886 83 Linux /dev/sdb2 37801 45601 3900+ 83 Linux /dev/sdb3 15602 73402 28900+ 83 Linux /dev/sdb4 23403 28796 2697 83 Linux The kernel creates these completely invalid devices, which can not be accessed, or may lead to other unpredictable failures: grep . /sys/class/block/sdb*/{start,size} /sys/class/block/sdb/size:28800 /sys/class/block/sdb1/start:29 /sys/class/block/sdb1/size:7772 /sys/class/block/sdb2/start:37801 /sys/class/block/sdb2/size:7801 /sys/class/block/sdb3/start:15602 /sys/class/block/sdb3/size:57801 /sys/class/block/sdb4/start:23403 /sys/class/block/sdb4/size:5394 With this patch, we ignore partitions which start behind the end of the disk, and limit partitions to the end of the disk if they pretend to be larger: grep . /sys/class/block/sdb*/{start,size} /sys/class/block/sdb/size:28800 /sys/class/block/sdb1/start:29 /sys/class/block/sdb1/size:7772 /sys/class/block/sdb3/start:15602 /sys/class/block/sdb3/size:13198 /sys/class/block/sdb4/start:23403 /sys/class/block/sdb4/size:5394 These warnings are printed to the kernel log: sdb: p2 ignored, start 37801 is behind the end of the disk sdb: p3 size 57801 limited to end of disk Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Herton Ronaldo Krzesinski <herton@mandriva.com.br> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/partitions/acorn.c: remove dead codeAdrian Bunk2008-10-16
| | | | | | | | | I missed this when I did the arm26 removal. Reported-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Check for device resize when rescanning partitionsAndrew Patterson2008-10-09
| | | | | | | | | | Check for device resize in the rescan_partitions() routine. If the device has been resized, the bdev size is set to match. The rescan_partitions() routine is called when opening the device and when calling the BLKRRPART ioctl. Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: allow disk to have extended device numberTejun Heo2008-10-09
| | | | | | | | | | | | | | | | | | | | | Now that disk and partition handlings are mostly unified, it's easy to allow disk to have extended device number. This patch makes add_disk() use extended device number if disk->minors is zero. Both sd and ide-disk are updated to use this. * sd_format_disk_name() is implemented which can generically determine the drive name. This removes disk number restriction stemming from limited device names. * If sd index goes over SD_MAX_DISKS (which can be increased now BTW), sd simply doesn't initialize minors letting block layer choose extended device number. * If CONFIG_DEBUG_EXT_DEVT is set, both sd and ide-disk always set minors to 0 and use extended device numbers. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: replace @ext_minors with GENHD_FL_EXT_DEVTTejun Heo2008-10-09
| | | | | | | | | | | | | | | With previous changes, it's meaningless to limit the number of partitions. Replace @ext_minors with GENHD_FL_EXT_DEVT such that setting the flag allows the disk to have maximum number of allowed partitions (only limited by the number of entries in parsed_partitions as determined by MAX_PART constant). This kills not-too-pretty alloc_disk_ext[_node]() functions and makes @minors parameter to alloc_disk[_node]() unnecessary. The parameter is left alone to avoid disturbing the users. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: make partition array dynamicTejun Heo2008-10-09
| | | | | | | | | | | | disk->__part used to be statically allocated to the maximum possible number of partitions. This patch makes partition array allocation dynamic. The added overhead is minimal as only real change is one memory dereference changed to RCU one. This saves both a bit of memory and cpu cycles iterating through unoccupied slots and makes increasing partition limit easier. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: move stats from disk to part0Tejun Heo2008-10-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move stats related fields - stamp, in_flight, dkstats - from disk to part0 and unify stat handling such that... * part_stat_*() now updates part0 together if the specified partition is not part0. ie. part_stat_*() are now essentially all_stat_*(). * {disk|all}_stat_*() are gone. * part_round_stats() is updated similary. It handles part0 stats automatically and disk_round_stats() is killed. * part_{inc|dec}_in_fligh() is implemented which automatically updates part0 stats for parts other than part0. * disk_map_sector_rcu() is updated to return part0 if no part matches. Combined with the above changes, this makes NULL special case handling in callers unnecessary. * Separate stats show code paths for disk are collapsed into part stats show code paths. * Rename disk_stat_lock/unlock() to part_stat_lock/unlock() While at it, reposition stat handling macros a bit and add missing parentheses around macro parameters. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: kill GENHD_FL_FAIL and use part0->make_it_failTejun Heo2008-10-09
| | | | | | | | GENHD_FL_FAIL for disk is what make_it_fail is for parts. Kill it and use part0->make_it_fail. Sysfs node handling is unified too. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: always set bdev->bd_partTejun Heo2008-10-09
| | | | | | | | | Till now, bdev->bd_part is set only if the bdev was for parts other than part0. This patch makes bdev->bd_part always set so that code paths don't have to differenciate common handling. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* block: move holder_dir from disk to part0Tejun Heo2008-10-09
| | | | | | | | | | | | | Move disk->holder_dir to part0->holder_dir. Kill now mostly superflous bdev_get_holder(). While at it, kill superflous kobject_get/put() around holder_dir, slave_dir and cmd_filter creation and collapse disk_sysfs_add_subdirs() into register_disk(). These serve no purpose but obfuscating the code. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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