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2007-07-15Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (166 commits) [SCSI] ibmvscsi: convert to use the data buffer accessors [SCSI] dc395x: convert to use the data buffer accessors [SCSI] ncr53c8xx: convert to use the data buffer accessors [SCSI] sym53c8xx: convert to use the data buffer accessors [SCSI] ppa: coding police and printk levels [SCSI] aic7xxx_old: remove redundant GFP_ATOMIC from kmalloc [SCSI] i2o: remove redundant GFP_ATOMIC from kmalloc from device.c [SCSI] remove the dead CYBERSTORMIII_SCSI option [SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA [SCSI] Clean up scsi_add_lun a bit [SCSI] 53c700: Remove printk, which triggers because of low scsi clock on SNI RMs [SCSI] sni_53c710: Cleanup [SCSI] qla4xxx: Fix underrun/overrun conditions [SCSI] megaraid_mbox: use mutex instead of semaphore [SCSI] aacraid: add 51245, 51645 and 52245 adapters to documentation. [SCSI] qla2xxx: update version to 8.02.00-k1. [SCSI] qla2xxx: add support for NPIV [SCSI] stex: use resid for xfer len information [SCSI] Add Brownie 1200U3P to blacklist [SCSI] scsi.c: convert to use the data buffer accessors ...
2007-07-15Merge branch 'master' of ↵Linus Torvalds
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (53 commits) [TCP]: Verify the presence of RETRANS bit when leaving FRTO [IPV6]: Call inet6addr_chain notifiers on link down [NET_SCHED]: Kill CONFIG_NET_CLS_POLICE [NET_SCHED]: act_api: qdisc internal reclassify support [NET_SCHED]: sch_dsmark: act_api support [NET_SCHED]: sch_atm: act_api support [NET_SCHED]: sch_atm: Lindent [IPV6]: MSG_ERRQUEUE messages do not pass to connected raw sockets [IPV4]: Cleanup call to __neigh_lookup() [NET_SCHED]: Revert "avoid transmit softirq on watchdog wakeup" optimization [NETFILTER]: nf_conntrack: UDPLITE support [NETFILTER]: nf_conntrack: mark protocols __read_mostly [NETFILTER]: x_tables: add connlimit match [NETFILTER]: Lower *tables printk severity [NETFILTER]: nf_conntrack: Don't track locally generated special ICMP error [NETFILTER]: nf_conntrack: Introduces nf_ct_get_tuplepr and uses it [NETFILTER]: nf_conntrack: make l3proto->prepare() generic and renames it [NETFILTER]: nf_conntrack: Increment error count on parsing IPv4 header [NET]: Add ethtool support for NETIF_F_IPV6_CSUM devices. [AF_IUCV]: Add lock when updating accept_q ...
2007-07-15make i2c-acorn tristateAl Viro
It depends on tristate I2C and it's trivial to make modular. The current Kconfig allows I2C=m, I2C_ACORN=y, which doesn't work at all; alternatives are dependency on I2C=y and making I2C_ACORN itself a tristate. The latter is the right thing to do... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-15icside: devm_iounmap() needs linux/io.hAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-15missing argument in bin_attribute ->read()/->write()Al Viro
Fallout from commit 91a6902958f052358899f58683d44e36228d85c2 ('sysfs: add parameter "struct bin_attribute *" ...') Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-15fallout from Auke's pci ->revision patchAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-15ax88796: dev_dbg() wants device, not platform deviceAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-15zd1211rw: too early inclusion of asm/unaligned.hAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-15PDA_POWER depends on having request_irq()Al Viro
... so all proud owners of s390-based PDAs will have to live without that one Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-15ieee1394: forgotten dereference...Al Viro
Going through the string and waiting for _pointer_ to become '\0' is not what the authors meant... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Ben Collins <ben.collins@ubuntu.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-15minimal fixes for drivers/usb/gadget/m66592-udc.cAl Viro
still looks racy (and definitely leaks) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-15[SCSI] ibmvscsi: convert to use the data buffer accessorsFUJITA Tomonori
- remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Santiago Leon <santil@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-15[SCSI] dc395x: convert to use the data buffer accessorsFUJITA Tomonori
- remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. Jens Axboe <jens.axboe@oracle.com> did the for_each_sg cleanup. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jamie Lenehan <lenehan@twibble.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-15[SCSI] ncr53c8xx: convert to use the data buffer accessorsFUJITA Tomonori
- remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. Jens Axboe <jens.axboe@oracle.com> did the for_each_sg cleanup. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Matthew Wilcox <matthew@wil.cx> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-15[SCSI] sym53c8xx: convert to use the data buffer accessorsFUJITA Tomonori
- remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. Jens Axboe <jens.axboe@oracle.com> did the for_each_sg cleanup. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Matthew Wilcox <matthew@wil.cx> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-15[SCSI] ppa: coding police and printk levelsAlan Cox
Add printk levels Clean up some oddities of formatting Fix goto labels Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-15[SCSI] aic7xxx_old: remove redundant GFP_ATOMIC from kmallocSatyam Sharma
drivers/scsi/aic7xxx_old.c:aic7xxx_slave_alloc() unnecessarily passes GFP_ATOMIC (along with GFP_KERNEL) to kmalloc() from a context that is not atomic. Remove the pointless GFP_ATOMIC. Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Doug Ledford <dledford@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-15[SCSI] i2o: remove redundant GFP_ATOMIC from kmalloc from device.cSatyam Sharma
drivers/message/i2o/device.c:i2o_parm_field_get() unnecessarily passes GFP_ATOMIC (along with GFP_KERNEL) to kmalloc() from a context that is not atomic. Remove the pointless GFP_ATOMIC. Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-15[SCSI] remove the dead CYBERSTORMIII_SCSI optionAdrian Bunk
Not converted to the 2.6 kconfig system and no code in the tree. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[NET]: Add ethtool support for NETIF_F_IPV6_CSUM devices.Michael Chan
Add ethtool utility function to set or clear IPV6_CSUM feature flag. Modify tg3.c and bnx2.c to use this function when doing ethtool -K to change tx checksum. Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14[NET]: Add macvlan driverPatrick McHardy
Add macvlan driver, which allows to create virtual ethernet devices based on MAC address. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14[SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMACornelia Huck
With dma-mapping-prevent-dma-dependent-code-from-linking-on.patch scsi fails to build on !HAS_DMA architectures: drivers/built-in.o(.text+0x20af6): In function `scsi_dma_map': : undefined reference to `dma_map_sg' drivers/built-in.o(.text+0x20b5c): In function `scsi_dma_unmap': : undefined reference to `dma_unmap_sg' I split those functions out into a new file. Builds on s390 and i386. Move scsi_dma_{map,unmap} into scsi_lib_dma.c which is only build if HAS_DMA is set. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: James Bottomley <James.Bottomley@SteelEye.com> Cc: Jeff Garzik <jeff@garzik.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] Clean up scsi_add_lun a bitMatthew Wilcox
This patch tidies up scsi_add_lun a bit. I rewrote the kerneldoc to match the actual parameters, moved the check for RBC and MMC REPORT_LUN devices away from the switch(), changed the setup of sdev->type to account for BLIST_ISROM, moved the check for BLIST_NO_ULD_ATTACH further down in the function, removed a bogus comment and fixed some whitespace issues. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] 53c700: Remove printk, which triggers because of low scsi clock on ↵Thomas Bogendoerfer
SNI RMs remove printk, which triggers because of low scsi clock on SNI RMs Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] sni_53c710: CleanupThomas Bogendoerfer
- base address is now a physical address; no need to convert it - remove not needed error printk in module init function Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] qla4xxx: Fix underrun/overrun conditionsDavid C Somayajulu
On Wed, 2007-06-06 at 11:55 -0700, David C Somayajulu wrote: This patch fixes the code handling underrun and overrun conditions. Also fixed coding style as per Mike Christie's advice. Signed-off-by: David Somayajulu <david.somayajulu@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] megaraid_mbox: use mutex instead of semaphoreMatthias Kaehlcke
The Megaraid Mailbox driver uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Acked-by: "Patro, Sumant" <Sumant.Patro@lsi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] qla2xxx: update version to 8.02.00-k1.Seokmann Ju
Following patch bump up the driver version reflecting NPIV addition to the qla2xxx. - version changed from 8.01.07-k7 to 8.02.00-k1. Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] qla2xxx: add support for NPIVSeokmann Ju
Following patch adds support for NPIV (N-Port ID Virtualization) to the qla2xxx. - supported within switched-fabric topologies only. - supports up to 63 virtual ports on each physical port. Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] stex: use resid for xfer len informationEd Lin
The original implementation in stex_ys_commands() is inappropriate. For xfer len information, we should use resid instead. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] Add Brownie 1200U3P to blacklistMatthew Wilcox
The Brownie 1200U3P has the same problem with REPORT LUNS as the 1600U3P. Add it to the blacklist. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] scsi.c: convert to use the data buffer accessorsBoaz Harrosh
- a couple of prints, they can use the accessors Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] tmscsim: Further clean-up of the driverBoaz Harrosh
- The saved sg_count was a leftover from the time the driver was doing dma mapping by himself. But now that scsi-ml is called for the mapping it is not the drivers responsibility. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Acked-by: G. Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] CONFIG_SCSI_FD_8xx no longer existsGeert Uytterhoeven
CONFIG_SCSI_FD_8xx no longer exists. Apparently it was renamed to CONFIG_SCSI_SEAGATE, but the Makefile was not correctly updated. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] sr: fix error handling in module_initAkinobu Mita
Sweep registered blkdev when scsi_register_driver has failed. Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] lpfc: Fix NPIV compile problemJames Bottomley
drivers/scsi/lpfc/lpfc_init.c: In function 'lpfc_create_port': drivers/scsi/lpfc/lpfc_init.c:1573: error: 'struct kobject' has no member named 'dentry' Just remove the if check on this ... lpfc shouldn't be poking around in kobject structures. drivers/scsi/lpfc/lpfc_init.c: In function 'lpfc_pci_probe_one': drivers/scsi/lpfc/lpfc_init.c:1723: warning: unused variable 'retval' And remove the unused variable. Cc: James Smart <James.Smart@Emulex.Com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] lpfc: fix NPIV mapping problemsFUJITA Tomonori
This patch uses dma_map_sg with phba->pcidev->dev instead of scsi_dma_map. scsi_dma_map doesn't work for NPIV since fc_vport->dev isn't fully initialized. check_addr() in arch/x86_64/kernel/pci-nommu.c leads to the crash since dev->dma_mask is NULL. For more details: http://marc.info/?l=linux-scsi&m=118312448030633&w=2 Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: James Smart <James.Smart@Emulex.Com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] lpfc: add missed data buffer accessorBoaz Harrosh
This is an addendum to: commit a0b4f78f9a4c869e9b29f254054ad7441cb40bbf Author: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> [SCSI] lpfc: convert to use the data buffer accessors One place was missed in the merge Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Acked-by: James Smart <James.Smart@Emulex.Com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-14[SCSI] Remove unused method scsi_device_cancelPriyanka Gupta
Removes an obsolete method scsi_device_cancel which isn't being used anywhere in the kernel. Signed-off-by: Priyanka Gupta <priyankag@google.com> Acked-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-13Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Fix typos in powernow-k8 printk's. [CPUFREQ] Restore previously used governor on a hot-replugged CPU [CPUFREQ] bugfix cpufreq in combination with performance governor [CPUFREQ] powernow-k8 compile fix. [CPUFREQ] the overdue removal of X86_SPEEDSTEP_CENTRINO_ACPI [CPUFREQ] Longhaul - Option to disable ACPI C3 support Fixed up arch/i386/kernel/cpu/cpufreq/powernow-k8.c due to revert that got fixed differently in the cpufreq branch. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-13Merge branch 'ioat-md-accel-for-linus' of ↵Linus Torvalds
git://lost.foo-projects.org/~dwillia2/git/iop * 'ioat-md-accel-for-linus' of git://lost.foo-projects.org/~dwillia2/git/iop: (28 commits) ioatdma: add the unisys "i/oat" pci vendor/device id ARM: Add drivers/dma to arch/arm/Kconfig iop3xx: surface the iop3xx DMA and AAU units to the iop-adma driver iop13xx: surface the iop13xx adma units to the iop-adma driver dmaengine: driver for the iop32x, iop33x, and iop13xx raid engines md: remove raid5 compute_block and compute_parity5 md: handle_stripe5 - request io processing in raid5_run_ops md: handle_stripe5 - add request/completion logic for async expand ops md: handle_stripe5 - add request/completion logic for async read ops md: handle_stripe5 - add request/completion logic for async check ops md: handle_stripe5 - add request/completion logic for async compute ops md: handle_stripe5 - add request/completion logic for async write ops md: common infrastructure for running operations with raid5_run_ops md: raid5_run_ops - run stripe operations outside sh->lock raid5: replace custom debug PRINTKs with standard pr_debug raid5: refactor handle_stripe5 and handle_stripe6 (v3) async_tx: add the async_tx api xor: make 'xor_blocks' a library routine for use with async_tx dmaengine: make clients responsible for managing channels dmaengine: refactor dmaengine around dma_async_tx_descriptor ...
2007-07-13[CHAR] Delete leftovers of old Alchemy UART driverRalf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-13ioatdma: add the unisys "i/oat" pci vendor/device idDan Williams
Cc: John Magolan <john.magolan@unisys.com> Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2007-07-13dmaengine: driver for the iop32x, iop33x, and iop13xx raid enginesDan Williams
The Intel(R) IOP series of i/o processors integrate an Xscale core with raid acceleration engines. The capabilities per platform are: iop219: (2) copy engines iop321: (2) copy engines (1) xor and block fill engine iop33x: (2) copy and crc32c engines (1) xor, xor zero sum, pq, pq zero sum, and block fill engine iop34x (iop13xx): (2) copy, crc32c, xor, xor zero sum, and block fill engines (1) copy, crc32c, xor, xor zero sum, pq, pq zero sum, and block fill engine The driver supports the features of the async_tx api: * asynchronous notification of operation completion * implicit (interupt triggered) handling of inter-channel transaction dependencies The driver adapts to the platform it is running by two methods. 1/ #include <asm/arch/adma.h> which defines the hardware specific iop_chan_* and iop_desc_* routines as a series of static inline functions 2/ The private platform data attached to the platform_device defines the capabilities of the channels 20070626: Callbacks are run in a tasklet. Given the recent discussion on LKML about killing tasklets in favor of workqueues I did a quick conversion of the driver. Raid5 resync performance dropped from 50MB/s to 30MB/s, so the tasklet implementation remains until a generic softirq interface is available. Changelog: * fixed a slot allocation bug in do_iop13xx_adma_xor that caused too few slots to be requested eventually leading to data corruption * enabled the slot allocation routine to attempt to free slots before returning -ENOMEM * switched the cleanup routine to solely use the software chain and the status register to determine if a descriptor is complete. This is necessary to support other IOP engines that do not have status writeback capability * make the driver iop generic * modified the allocation routines to understand allocating a group of slots for a single operation * added a null xor initialization operation for the xor only channel on iop3xx * support xor operations on buffers larger than the hardware maximum * split the do_* routines into separate prep, src/dest set, submit stages * added async_tx support (dependent operations initiation at cleanup time) * simplified group handling * added interrupt support (callbacks via tasklets) * brought the pending depth inline with ioat (i.e. 4 descriptors) * drop dma mapping methods, suggested by Chris Leech * don't use inline in C files, Adrian Bunk * remove static tasklet declarations * make iop_adma_alloc_slots easier to read and remove chances for a corrupted descriptor chain * fix locking bug in iop_adma_alloc_chan_resources, Benjamin Herrenschmidt * convert capabilities over to dma_cap_mask_t * fixup sparse warnings * add descriptor flush before iop_chan_enable * checkpatch.pl fixes * gpl v2 only correction * move set_src, set_dest, submit to async_tx methods * move group_list and phys to async_tx Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2007-07-13md: remove raid5 compute_block and compute_parity5Dan Williams
replaced by raid5_run_ops Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-By: NeilBrown <neilb@suse.de>
2007-07-13md: handle_stripe5 - request io processing in raid5_run_opsDan Williams
I/O submission requests were already handled outside of the stripe lock in handle_stripe. Now that handle_stripe is only tasked with finding work, this logic belongs in raid5_run_ops. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-By: NeilBrown <neilb@suse.de>
2007-07-13md: handle_stripe5 - add request/completion logic for async expand opsDan Williams
When a stripe is being expanded bulk copying takes place to move the data from the old stripe to the new. Since raid5_run_ops only operates on one stripe at a time these bulk copies are handled in-line under the stripe lock. In the dma offload case we poll for the completion of the operation. After the data has been copied into the new stripe the parity needs to be recalculated across the new disks. We reuse the existing postxor functionality to carry out this calculation. By setting STRIPE_OP_POSTXOR without setting STRIPE_OP_BIODRAIN the completion path in handle stripe can differentiate expand operations from normal write operations. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-By: NeilBrown <neilb@suse.de>
2007-07-13md: handle_stripe5 - add request/completion logic for async read opsDan Williams
When a read bio is attached to the stripe and the corresponding block is marked R5_UPTODATE, then a read (biofill) operation is scheduled to copy the data from the stripe cache to the bio buffer. handle_stripe flags the blocks to be operated on with the R5_Wantfill flag. If new read requests arrive while raid5_run_ops is running they will not be handled until handle_stripe is scheduled to run again. Changelog: * cleanup to_read and to_fill accounting * do not fail reads that have reached the cache Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-By: NeilBrown <neilb@suse.de>
2007-07-13md: handle_stripe5 - add request/completion logic for async check opsDan Williams
Check operations are scheduled when the array is being resynced or an explicit 'check/repair' command was sent to the array. Previously check operations would destroy the parity block in the cache such that even if parity turned out to be correct the parity block would be marked !R5_UPTODATE at the completion of the check. When the operation can be carried out by a dma engine the assumption is that it can check parity as a read-only operation. If raid5_run_ops notices that the check was handled by hardware it will preserve the R5_UPTODATE status of the parity disk. When a check operation determines that the parity needs to be repaired we reuse the existing compute block infrastructure to carry out the operation. Repair operations imply an immediate write back of the data, so to differentiate a repair from a normal compute operation the STRIPE_OP_MOD_REPAIR_PD flag is added. Changelog: * remove test_and_set/test_and_clear BUG_ONs, Neil Brown Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-By: NeilBrown <neilb@suse.de>
2007-07-13md: handle_stripe5 - add request/completion logic for async compute opsDan Williams
handle_stripe will compute a block when a backing disk has failed, or when it determines it can save a disk read by computing the block from all the other up-to-date blocks. Previously a block would be computed under the lock and subsequent logic in handle_stripe could use the newly up-to-date block. With the raid5_run_ops implementation the compute operation is carried out a later time outside the lock. To preserve the old functionality we take advantage of the dependency chain feature of async_tx to flag the block as R5_Wantcompute and then let other parts of handle_stripe operate on the block as if it were up-to-date. raid5_run_ops guarantees that the block will be ready before it is used in another operation. However, this only works in cases where the compute and the dependent operation are scheduled at the same time. If a previous call to handle_stripe sets the R5_Wantcompute flag there is no facility to pass the async_tx dependency chain across successive calls to raid5_run_ops. The req_compute variable protects against this case. Changelog: * remove the req_compute BUG_ON Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-By: NeilBrown <neilb@suse.de>
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