What's in the block git tree for 2.6.31

From: Jens Axboe
Date: Wed Jun 10 2009 - 02:26:35 EST

Hi,

So 2.6.30 is released and I have a pile of stuff pending for 2.6.31 in
the block git tree.

- The major bit is the request peek/retrieval interface got a long
overdue overhaul. This will require changes to block drivers, but they
are fairly trivial and should result in simpler code. Drivers used to
call elv_next_request() to get the next request for service, and then
blkdev_dequeue_request() to remove the request from the internal
queues. Some drivers deferred the removal to end IO time, while others
dequeued immediately after elv_next_request(). This has now been
replaced with blk_fetch_request(), which retrieves and removes the
next request for service. There's also a peek operation,
blk_peek_request(), which can then be paired with blk_start_request()
for a functional equivalent to blk_fetch_request(). Requests must now
be dequeued for end IO processing. Thanks to Tejun Heo for all his
great work here.

- Cleanup of the bi-directional command io completion from FUJITA
Tomonori.

- Support for passing in a list of linked bio's for IO submission from
Boaz Harrosh. This gets rid of blk_rq_append_bio outside of the block
core and provides functionality to OSD.

- Tweak to the block layer tagging that only allows async requests to
consume part of the tag space. This should help with devices that have
tag starvation issues.

- Some splice updates from Miklos. We now support pipe to pipe splicing
and have fallback support for copy splice on read and write.

- Export of IO topology through sysfs from Martin Petersen.

- A bunch of fixes and cleanups to the cciss driver.

- Various other little driver changes and bug fixes.

Find the list of changes below, with an git url to pull from. This code
has been in -next for the past month or so.

git://git.kernel.dk/linux-2.6-block.git for-2.6.31

Akinobu Mita (1):
loop: use BIO list management functions

Andrew Morton (2):
splice: fix error return code
cciss: use schedule_timeout_interruptible()

Andrew Patterson (1):
cciss: add cciss driver sysfs entries

Bartlomiej Zolnierkiewicz (4):
mg_disk: fix CONFIG_LBD=y warning
block: enable by default support for large devices and files on 32-bit archs
mg_disk: fix dependency on libata
mg_disk: use defines from <linux/ata.h>

Boaz Harrosh (5):
libosd: Use new blk_rq_map_kern
block: Add blk_make_request(), takes bio, returns a request
libosd: Use of new blk_make_request
block: Un-export blk_rq_append_bio
scsi_lib: remove unused variable

Borislav Petkov (3):
ide: add helpers for preparing sense requests
ide-cd: convert to using generic sense request
ide-atapi: convert ide-{floppy,tape} to using preallocated sense buffer

Christoph Hellwig (1):
virtio_blk: don't blindly derefence req->rq_disk

FUJITA Tomonori (4):
block: let blk_end_request_all handle bidi requests
scsi: simplify the bidi completion
block: move completion related functions back to blk-core.c
block: needs to set the residual length of a bidi request

Hannes Reinecke (1):
virtio_blk: SG_IO passthru support

James Bottomley (3):
block: allow blk_rq_map_kern to append to requests
block: fix oops with block tag queueing
block: fix an oops on BLKPREP_KILL

Jeff Moyer (1):
block: implement blkdev_readpages

Jens Axboe (11):
block: make blk_do_io_stat() do the full "is this rq accountable" checks
block: include discard requests in IO accounting
splice: fix misleading comment
splice: fix repeated kmap()'s in default_file_splice_read()
virtio_blk: get rid of unused variable
block: add warning to blk_make_request()
block: change the tag sync vs async restriction logic
Merge branch 'master' into for-2.6.31
Merge branch 'master' into for-2.6.31
Revert "block: implement blkdev_readpages"
Revert "block: Fix bounce limit setting in DM"

Kiyoshi Ueda (2):
block: fix no diskstat problem
block: fix a possible oops on elv_abort_queue()

Martin K. Petersen (8):
block: Do away with the notion of hardsect_size
block: Use accessor functions for queue limits
block: Move queue limits to an embedded struct
block: Expose stacked device queues in sysfs
block: Export I/O topology for block devices and partitions
ide-disk: fix missing max_sectors accessor function
block: Fix bounce limit setting in DM
block: Add missing bounce_pfn stacking and fix comments

Mike Snitzer (1):
block: export blk_stack_limits()

Miklos Szeredi (4):
splice: implement pipe to pipe splicing
splice: implement default splice_read method
splice: implement default splice_write method
splice: fix kmaps in default_file_splice_write()

Nikanth Karthikesan (1):
block: catch trying to use more bits than request->cmd_flags has

Roel Kluin (1):
xen-blkfront: beyond ARRAY_SIZE of info->shadow

Stephen M. Cameron (2):
cciss: factor out core of sendcmd() for a more sane interface
cciss: fix SCSI device reset handler

Tejun Heo (84):
mg_disk: fix locking
hd: fix locking
block: clear req->errors on bio completion only for fs requests
ide-tape: remove back-to-back REQUEST_SENSE detection
ide: use blk_run_queue() instead of blk_start_queueing()
ide: don't set REQ_SOFTBARRIER
ide kill unused ide_cmd->special
ide-cd: clear sense buffer before issuing request sense
ide-floppy: block pc always uses bio
ide-taskfile: don't abuse rq->buffer
ide-atapi: don't abuse rq->buffer
ide-cd: don't abuse rq->buffer
ide-cd,atapi: use bio for internal commands
ide-pm: don't abuse rq->data
ide-tape,floppy: fix failed command completion after request sense
ide-atapi,tape,floppy: allow ->pc_callback() to change rq->data_len
ide-tape: use single continuous buffer
ide-tape: use standard data transfer mechanism
ide-tape: kill idetape_bh
ide-tape: unify r/w init paths
ide-tape: use byte size instead of sectors on rw issue functions
ide-tape: simplify read/write functions
ide-atapi: kill unused fields and callbacks
ide: drop rq->data handling from ide_map_sg()
ide-dma: don't reset request fields on dma_timeout_retry()
block: merge blk_invoke_request_fn() into __blk_run_queue()
block: kill blk_start_queueing()
block: don't set REQ_NOMERGE unnecessarily
block: cleanup REQ_SOFTBARRIER usages
block: clean up misc stuff after block layer timeout conversion
block: reorder request completion functions
block: reorganize request fetching functions
block: kill blk_end_request_callback()
block: clean up request completion API
block: move rq->start_time initialization to blk_rq_init()
block: implement and use [__]blk_end_request_all()
block: replace end_request() with [__]blk_end_request_cur()
arm-omap: don't abuse rq->data
block: kill rq->data
block: make blk_end_request_cur() return bool
block: don't init rq fields unnecessarily
amiflop,ataflop,xd,mg_disk: clean up unnecessary stuff from block drivers
ps3disk: simplify request completion
sunvdc: kill vdc_end_request()
ubd: cleanup completion path
ubd: drop unnecessary rq->sector manipulation
hd: clean up request completion paths
swim3: clean up request completion paths
swim: clean up request completion paths
mg_disk: fold mg_disk.h into mg_disk.c
mg_disk: clean up request completion paths
nbd: don't clear rq->sector and nr_sectors unnecessarily
ide-tape: don't initialize rq->sector for rw requests
block: add rq->resid_len
block: implement blk_rq_pos/[cur_]sectors() and convert obvious ones
block: convert to pos and nr_sectors accessors
ide: convert to rq pos and nr_sectors accessors
block: drop request->hard_* and *nr_sectors
block: cleanup rq->data_len usages
ide: cleanup rq->data_len usages
block: hide request sector and data_len
block: blk_rq_[cur_]_{sectors|bytes}() usage cleanup
ide: dequeue in-flight request
mg_disk: fix queue hang / infinite retry on !fs requests
mg_disk: dequeue and track in-flight request
hd: dequeue and track in-flight request
ataflop: dequeue and track in-flight request
swim3: dequeue in-flight request
xsysace: dequeue in-flight request
paride: dequeue in-flight request
ps3disk: dequeue in-flight request
amiflop: dequeue in-flight request
swim: dequeue in-flight request
xd: dequeue in-flight request
mtd_blkdevs: dequeue in-flight request
jsflash: dequeue in-flight request
z2ram: dequeue in-flight request
block: convert to dequeueing model (easy ones)
gdrom: dequeue in-flight request
block: implement and enforce request peek/start/fetch
scsi: fix resid_len mis-conversion in scsi_end_request()
ub: use __blk_end_request_all()
block: set rq->resid_len to blk_rq_bytes() on issue
bio: always copy back data for copied kernel requests

john cooper (1):
Add serial number support for virtio_blk, V4a

scameron@xxxxxxxxxxxxxxxxxxxxxxx (8):
cciss: Use schedule_timeout_uninterruptible in SCSI error handling code
cciss: factor out core of sendcmd_withirq() for use by SCSI error handling code
cciss: simplify interface of sendcmd() and sendcmd_withirq()
cciss: factor out fix target status processing code from sendcmd functions
cciss: separate error processing and command retrying code in sendcmd_withirq_core()
cciss: change SCSI error handling routines to work with interrupts enabled.
cciss: Remove no longer needed sendcmd reject processing code
cciss: decode unit attention in SCSI error handling code

vibi sreenivasan (1):
Removed reference to non-existing file Documentation/PCI/PCI-DMA-mapping.txt

Documentation/ABI/testing/sysfs-block | 59 ++
.../ABI/testing/sysfs-bus-pci-devices-cciss | 33 +
Documentation/block/biodoc.txt | 2 +-
arch/arm/plat-omap/mailbox.c | 63 +-
arch/powerpc/sysdev/axonram.c | 2 +-
arch/um/drivers/ubd_kern.c | 36 +-
block/Kconfig | 11 +-
block/as-iosched.c | 24 +-
block/blk-barrier.c | 27 +-
block/blk-core.c | 758 ++++++++++-------
block/blk-exec.c | 1 -
block/blk-integrity.c | 2 +-
block/blk-map.c | 25 +-
block/blk-merge.c | 71 +-
block/blk-settings.c | 269 +++++-
block/blk-sysfs.c | 59 +-
block/blk-tag.c | 17 +-
block/blk-timeout.c | 22 +-
block/blk.h | 51 +-
block/bsg.c | 8 +-
block/cfq-iosched.c | 36 +-
block/compat_ioctl.c | 4 +-
block/deadline-iosched.c | 2 +-
block/elevator.c | 185 +----
block/genhd.c | 11 +
block/ioctl.c | 12 +-
block/scsi_ioctl.c | 13 +-
drivers/ata/libata-scsi.c | 2 +-
drivers/block/DAC960.c | 10 +-
drivers/block/Kconfig | 2 +-
drivers/block/amiflop.c | 54 +-
drivers/block/ataflop.c | 66 +-
drivers/block/cciss.c | 927 ++++++++++++--------
drivers/block/cciss.h | 34 +-
drivers/block/cciss_cmd.h | 2 +
drivers/block/cciss_scsi.c | 109 ++-
drivers/block/cpqarray.c | 20 +-
drivers/block/floppy.c | 58 +-
drivers/block/hd.c | 106 ++--
drivers/block/loop.c | 37 +-
drivers/block/mg_disk.c | 537 +++++++-----
drivers/block/nbd.c | 23 +-
drivers/block/paride/pcd.c | 29 +-
drivers/block/paride/pd.c | 22 +-
drivers/block/paride/pf.c | 47 +-
drivers/block/pktcdvd.c | 8 +-
drivers/block/ps3disk.c | 24 +-
drivers/block/sunvdc.c | 14 +-
drivers/block/swim.c | 48 +-
drivers/block/swim3.c | 107 ++--
drivers/block/sx8.c | 17 +-
drivers/block/ub.c | 54 +-
drivers/block/viodasd.c | 12 +-
drivers/block/virtio_blk.c | 110 ++-
drivers/block/xd.c | 41 +-
drivers/block/xen-blkfront.c | 34 +-
drivers/block/xsysace.c | 46 +-
drivers/block/z2ram.c | 19 +-
drivers/cdrom/cdrom.c | 4 +-
drivers/cdrom/gdrom.c | 36 +-
drivers/cdrom/viocd.c | 33 +-
drivers/char/raw.c | 2 +-
drivers/ide/ide-atapi.c | 177 +++--
drivers/ide/ide-cd.c | 152 +---
drivers/ide/ide-cd.h | 4 -
drivers/ide/ide-disk.c | 11 +-
drivers/ide/ide-dma.c | 22 +-
drivers/ide/ide-floppy.c | 32 +-
drivers/ide/ide-io.c | 57 +-
drivers/ide/ide-ioctls.c | 1 -
drivers/ide/ide-lib.c | 2 +-
drivers/ide/ide-park.c | 7 +-
drivers/ide/ide-pm.c | 38 +-
drivers/ide/ide-tape.c | 735 ++++------------
drivers/ide/ide-taskfile.c | 20 +-
drivers/ide/pdc202xx_old.c | 2 +-
drivers/ide/tc86c001.c | 2 +-
drivers/ide/tx4939ide.c | 2 +-
drivers/md/bitmap.c | 4 +-
drivers/md/dm-exception-store.c | 2 +-
drivers/md/dm-log.c | 3 +-
drivers/md/dm-snap-persistent.c | 2 +-
drivers/md/dm-table.c | 38 +-
drivers/md/linear.c | 2 +-
drivers/md/md.c | 2 +-
drivers/md/multipath.c | 4 +-
drivers/md/raid0.c | 2 +-
drivers/md/raid1.c | 4 +-
drivers/md/raid10.c | 8 +-
drivers/md/raid5.c | 4 +-
drivers/memstick/core/mspro_block.c | 19 +-
drivers/message/fusion/mptsas.c | 22 +-
drivers/message/i2o/i2o_block.c | 43 +-
drivers/mmc/card/block.c | 12 +-
drivers/mmc/card/queue.c | 11 +-
drivers/mtd/mtd_blkdevs.c | 43 +-
drivers/s390/block/dasd.c | 37 +-
drivers/s390/block/dasd_diag.c | 5 +-
drivers/s390/block/dasd_eckd.c | 6 +-
drivers/s390/block/dasd_fba.c | 7 +-
drivers/s390/block/dcssblk.c | 2 +-
drivers/s390/block/xpram.c | 2 +-
drivers/s390/char/tape_34xx.c | 2 +-
drivers/s390/char/tape_3590.c | 2 +-
drivers/s390/char/tape_block.c | 26 +-
drivers/sbus/char/jsflash.c | 26 +-
drivers/scsi/eata.c | 24 +-
drivers/scsi/libsas/sas_expander.c | 16 +-
drivers/scsi/libsas/sas_host_smp.c | 49 +-
drivers/scsi/lpfc/lpfc_scsi.c | 22 +-
drivers/scsi/mpt2sas/mpt2sas_transport.c | 23 +-
drivers/scsi/osd/osd_initiator.c | 72 +-
drivers/scsi/scsi_lib.c | 87 +--
drivers/scsi/scsi_tgt_lib.c | 2 +-
drivers/scsi/scsi_transport_sas.c | 4 +-
drivers/scsi/sd.c | 26 +-
drivers/scsi/sd_dif.c | 2 +-
drivers/scsi/sg.c | 17 +-
drivers/scsi/sr.c | 17 +-
drivers/scsi/st.c | 6 +-
drivers/scsi/u14-34f.c | 22 +-
drivers/usb/storage/scsiglue.c | 4 +-
fs/bio.c | 24 +-
fs/block_dev.c | 6 +-
fs/buffer.c | 6 +-
fs/coda/file.c | 9 +-
fs/direct-io.c | 2 +-
fs/exofs/osd.c | 4 +-
fs/ext3/super.c | 4 +-
fs/ext4/super.c | 2 +-
fs/gfs2/ops_fstype.c | 4 +-
fs/gfs2/rgrp.c | 2 +-
fs/nilfs2/the_nilfs.c | 2 +-
fs/ntfs/super.c | 6 +-
fs/ocfs2/cluster/heartbeat.c | 2 +-
fs/ocfs2/super.c | 2 +-
fs/partitions/check.c | 10 +
fs/partitions/ibm.c | 2 +-
fs/partitions/msdos.c | 4 +-
fs/pipe.c | 14 +
fs/read_write.c | 7 +-
fs/splice.c | 338 +++++++-
fs/udf/super.c | 2 +-
fs/xfs/linux-2.6/xfs_buf.c | 2 +-
include/linux/bio.h | 10 +-
include/linux/blkdev.h | 240 ++++--
include/linux/device-mapper.h | 2 +-
include/linux/elevator.h | 4 +-
include/linux/fs.h | 2 +
include/linux/genhd.h | 1 +
include/linux/ide.h | 27 +-
include/linux/loop.h | 3 +-
include/linux/mg_disk.h | 206 -----
include/linux/pipe_fs_i.h | 1 +
include/linux/splice.h | 3 +-
include/linux/virtio_blk.h | 12 +
include/scsi/scsi_cmnd.h | 2 +-
kernel/trace/blktrace.c | 16 +-
mm/bounce.c | 4 +-
159 files changed, 3983 insertions(+), 3498 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
delete mode 100644 include/linux/mg_disk.h

--
Jens Axboe

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