linux.git/drivers/md/multipath.c, branch v2.6.30

md: centralize ->array_sectors modifications

2009-03-31T03:59:03+00:00

Get personalities out of the business of directly modifying
->array_sectors.  Lays groundwork to introduce policy on when
->array_sectors can be modified.

Reviewed-by: Andre Noll 
Signed-off-by: Dan Williams

md: add 'size' as a personality method

2009-03-31T03:57:49+00:00

In preparation for giving userspace control over ->array_sectors we need
to be able to retrieve the 'default' size, and the 'anticipated' size
when a reshape is requested.  For personalities that do not reshape emit
a warning if anything but the default size is requested.

In the raid5 case we need to update ->previous_raid_disks to make the
new 'default' size available.

Reviewed-by: Andre Noll 
Signed-off-by: Dan Williams

md: Make mddev->size sector-based.

2009-03-31T03:33:13+00:00

This patch renames the "size" field of struct mddev_s to "dev_sectors"
and stores the number of 512-byte sectors instead of the number of
1K-blocks in it.

All users of that field, including raid levels 1,4-6,10, are adjusted
accordingly. This simplifies the code a bit because it allows to get
rid of a couple of divisions/multiplications by two.

In order to make checkpatch happy, some minor coding style issues
have also been addressed. In particular, size_store() now uses
strict_strtoull() instead of simple_strtoull().

Signed-off-by: Andre Noll 
Signed-off-by: NeilBrown

md: move md_k.h from include/linux/raid/ to drivers/md/

2009-03-31T03:33:13+00:00

It really is nicer to keep related code together..

Signed-off-by: NeilBrown

md: move lots of #include lines out of .h files and into .c

2009-03-31T03:33:13+00:00

This makes the includes more explicit, and is preparation for moving
md_k.h to drivers/md/md.h

Remove include/raid/md.h as its only remaining use was to #include
other files.

Signed-off-by: NeilBrown

md: move headers out of include/linux/raid/

2009-03-31T03:27:03+00:00

Move the headers with the local structures for the disciplines and
bitmap.h into drivers/md/ so that they are more easily grepable for
hacking and not far away.  md.h is left where it is for now as there
are some uses from the outside.

Signed-off-by: Christoph Hellwig 
Signed-off-by: NeilBrown

md: use list_for_each_entry macro directly

2009-01-08T21:31:08+00:00

The rdev_for_each macro defined in  is identical to
list_for_each_entry_safe, from , it should be defined to
use list_for_each_entry_safe, instead of reinventing the wheel.

But some calls to each_entry_safe don't really need a safe version,
just a direct list_for_each_entry is enough, this could save a temp
variable (tmp) in every function that used rdev_for_each.

In this patch, most rdev_for_each loops are replaced by list_for_each_entry,
totally save many tmp vars; and only in the other situations that will call
list_del to delete an entry, the safe version is used.

Signed-off-by: Cheng Renquan 
Signed-off-by: NeilBrown

Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

2008-10-17T16:00:23+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (39 commits)
  [SCSI] sd: fix compile failure with CONFIG_BLK_DEV_INTEGRITY=n
  libiscsi: fix locking in iscsi_eh_device_reset
  libiscsi: check reason why we are stopping iscsi session to determine error value
  [SCSI] iscsi_tcp: return a descriptive error value during connection errors
  [SCSI] libiscsi: rename host reset to target reset
  [SCSI] iscsi class: fix endpoint id handling
  [SCSI] libiscsi: Support drivers initiating session removal
  [SCSI] libiscsi: fix data corruption when target has to resend data-in packets
  [SCSI] sd: Switch kernel printing level for DIF messages
  [SCSI] sd: Correctly handle all combinations of DIF and DIX
  [SCSI] sd: Always print actual protection_type
  [SCSI] sd: Issue correct protection operation
  [SCSI] scsi_error: fix target reset handling
  [SCSI] lpfc 8.2.8 v2 : Add statistical reporting control and additional fc vendor events
  [SCSI] lpfc 8.2.8 v2 : Add sysfs control of target queue depth handling
  [SCSI] lpfc 8.2.8 v2 : Revert target busy in favor of transport disrupted
  [SCSI] scsi_dh_alua: remove REQ_NOMERGE
  [SCSI] lpfc 8.2.8 : update driver version to 8.2.8
  [SCSI] lpfc 8.2.8 : Add MSI-X support
  [SCSI] lpfc 8.2.8 : Update driver to use new Host byte error code DID_TRANSPORT_DISRUPTED
  ...

[SCSI] block: separate failfast into multiple bits.

2008-10-13T13:28:52+00:00

Multipath is best at handling transport errors. If it gets a device
error then there is not much the multipath layer can do. It will just
access the same device but from a different path.

This patch breaks up failfast into device, transport and driver errors.
The multipath layers (md and dm mutlipath) only ask the lower levels to
fast fail transport errors. The user of failfast, read ahead, will ask
to fast fail on all errors.

Note that blk_noretry_request will return true if any failfast bit
is set. This allows drivers that do not support the multipath failfast
bits to continue to fail on any failfast error like before. Drivers
like scsi that are able to fail fast specific errors can check
for the specific fail fast type. In the next patch I will convert
scsi.

Signed-off-by: Mike Christie 
Cc: Jens Axboe 
Signed-off-by: James Bottomley

md: Remove unnecessary #includes, #defines, and function declarations.

2008-10-13T00:55:12+00:00

A lot of cruft has gathered over the years.  Time to remove it.

Signed-off-by: NeilBrown