user/sven/linux.git/drivers/scsi/device_handler, branch ipvs/cleanups

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32Z

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 Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn

[SCSI] scsi_dh_emc: fix mode select request setup

2010-03-03T10:30:11Z

This patch fixes the request setup code for mode selects. I got the fixes from Hannes Reinecke while trying to hunt down some problems and merged it into one patch. I am sending it because Hannes is busy with other things. The patch fixes: - setting of the length for mode selects. - setting of the data direction for mode select 10. Signed-off-by: Hannes Reinecke Signed-off-by: Mike Christie Signed-off-by: James Bottomley

[SCSI] scsi_dh_alua: Add IBM Power Virtual SCSI ALUA device to dev list

2010-02-19T16:52:54Z

Adds IBM Power Virtual SCSI ALUA devices to the ALUA device handler. Signed-off-by: Brian King Signed-off-by: James Bottomley

[SCSI] scsi_dh_alua: add netapp to dev list

2010-02-19T16:51:47Z

Newer Netapp target software supports ALUA, so this patch adds them to the scsi_dev_alua dev list. Signed-off-by: Mike Christie Signed-off-by: James Bottomley

[SCSI] scsi_dh_rdac: Add two new IBM devices to rdac_dev_list

2009-12-10T14:54:10Z

This patch adds two new IBM storage devices which can use rdac device handlers. Signed-off-by: Babu Moger Signed-off-by: James Bottomley

[SCSI] scsi_dh: create sysfs file, dh_state for all SCSI disk devices

2009-12-04T18:01:29Z

Create the sysfs file, dh_state even if the new SCSI device is not in the any of the device handler's internal lists. Signed-Off-by: Chandra Seetharaman Acked-by: Hannes Reinecke Signed-off-by: James Bottomley

[SCSI] scsi_dh: Make alua hardware handler's activate() async

2009-12-04T18:00:48Z

Make the activate function asynchronous by using blk_execute_rq_nowait() Signed-off-by: Chandra Seetharaman Signed-off-by: James Bottomley

[SCSI] scsi_dh: Make hp hardware handler's activate() async

2009-12-04T18:00:47Z

Make the activate function asynchronous by using blk_execute_rq_nowait() Signed-off-by: Chandra Seetharaman Signed-off-by: James Bottomley

[SCSI] scsi_dh: Make rdac hardware handler's activate() async

2009-12-04T18:00:47Z

Batch up MODE_SELECT in rdac device handler. LSI RDAC storage has the capability of handling mode selects for multiple luns in a same command. Make use of that ability to send as few MODE SELECTs as possible to the storage controller as possible. This patch creates a work queue and queues up activate requests when a MODE SELECT is sent down the wire. When that MODE SELECT completes, it compiles queued up activate requests for multiple luns into a single MODE SELECT. This reduces the time to do failover/failback of large number of LUNS. Signed-off-by: Babu Moger Signed-off-by: Chandra Seetharaman Signed-off-by: James Bottomley

[SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronous

2009-12-04T18:00:46Z

Make scsi_dh_activate() function asynchronous, by taking in two additional parameters, one is the callback function and the other is the data to call the callback function with. Signed-off-by: Chandra Seetharaman Signed-off-by: James Bottomley