- 17 9月, 2010 4 次提交
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由 Christof Schmitt 提交于
Move the code evaluating the ACL/CFDC specific errors to the file zfcp_cfdc.c. With this change, all code related to the old access control feature is kept in one file, not split across zfcp_erp.c and zfcp_fsf.c. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Instead of calling the same handler for both, I/O and task management commands, use different handlers that call a function for the common part. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
With the change to use the data on the SCSI device, iterating through all LUNs/scsi_devices takes the SCSI host_lock. This triggers warnings from the lock dependency checker: ========================================================= [ INFO: possible irq lock inversion dependency detected ] 2.6.34.1 #97 --------------------------------------------------------- chchp/3224 just changed the state of lock: (&(shost->host_lock)->rlock){-.-...}, at: [<00000000003a73f4>] __scsi_iterate_devices+0x38/0xbc but this lock took another, HARDIRQ-unsafe lock in the past: (&(&qdio->req_q_lock)->rlock){+.-...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: [ 24.972394] 2 locks held by chchp/3224: #0: (&(sch->lock)->rlock){-.-...}, at: [<0000000000401efa>] do_IRQ+0xb2/0x1e4 #1: (&adapter->port_list_lock){.-....}, at: [<0000000000490302>] zfcp_erp_modify_adapter_status+0x9e/0x16c [...] ========================================================= [ INFO: possible irq lock inversion dependency detected ] 2.6.34.1 #98 --------------------------------------------------------- chchp/3235 just changed the state of lock: (&(shost->host_lock)->rlock){-.-...}, at: [<00000000003a73f4>] __scsi_iterate_devices+0x38/0xbc but this lock took another, HARDIRQ-unsafe lock in the past: (&(&qdio->stat_lock)->rlock){+.-...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: 2 locks held by chchp/3235: #0: (&(sch->lock)->rlock){-.-...}, at: [<0000000000401efa>] do_IRQ+0xb2/0x1e4 #1: (&adapter->port_list_lock){.-.-..}, at: [<00000000004902f6>] zfcp_erp_modify_adapter_status+0x9e/0x16c [...] To stop this warning, change the request queue lock to disable irqs, not only softirq. The changes are required only outside of the critical "send fcp command" path. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
This is the large change to switch from using the data in zfcp_unit to zfcp_scsi_dev. Keeping everything working requires doing the switch in one piece. To ensure that no code keeps using the data in zfcp_unit, this patch also removes the data from zfcp_unit that is now being replaced with zfcp_scsi_dev. For zfcp, the scsi_device together with zfcp_scsi_dev exist from the call of slave_alloc to the call of slave_destroy. The data in zfcp_scsi_dev is initialized in zfcp_scsi_slave_alloc and the LUN is opened; the final shutdown for the LUN is run from slave_destroy. Where the scsi_device or zfcp_scsi_dev is needed, the pointer to the scsi_device is passed as function argument and inside the function converted to the pointer to zfcp_scsi_dev; this avoids back and forth conversion betweeen scsi_device and zfcp_scsi_dev. While changing the function arguments from zfcp_unit to scsi_device, the functions names are renamed form "unit" to "lun". This is to have a seperation between zfcp_scsi_dev/LUN and the zfcp_unit; only code referring to the remaining configuration information in zfcp_unit struct uses "unit". Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 28 7月, 2010 6 次提交
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由 Christof Schmitt 提交于
Exploit the cio siosl function to trigger logging in the FCP channel on qdio error conditions. Add a helper function in zfcp_qdio to ensure that tracing is only triggered once before calling qdio_shutdown. Trigger in zfcp for hardware logs are: - timeout for FSF requests to the FCP channel - "no recommendation" status from FCP channel - invalid FSF protocol status - stalled outbound queue - unknown request id on inbound queue - QDIO_ERROR_SLSB_STATE All of the above triggers run from the Linux qdio softirq context, so no additional synchronization is necessary for the handling of the ZFCP_STATUS_ADAPTER_SIOSL_ISSUED flag. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Felix Beck 提交于
Introduce support for DIF/DIX in zfcp: Report the capabilities for the Scsi_host, map the protection data when issuing I/O requests and handle the new error codes. Also add the fsf data_direction field to the hba trace, it is useful information for debugging in that area. This is an EXPERIMENTAL feature for now. Signed-off-by: NFelix Beck <felix.beck@de.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Sven Schuetz 提交于
Post FC transport class netlink events for usage in the userspace, e.g. for HBAAPI. Supported events are those required for the polled events in HBAAPI. - link up - link down - incoming RSCN (events related to FC-AL are not supported, as zfcp has no support for FC-AL) Signed-off-by: NSven Schuetz <sven@linux.vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Swen Schillig 提交于
Some definitions and structures in the zfcp QDIO processing are improved by the removal of not required variables and processing steps. I addition the naming of some variables is changed to make their purpose more clear. Signed-off-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Swen Schillig 提交于
A lot of functions require the amount of SBALs as one of their parameter which is most times invariable. Therefore remove this parameter and set the SBAL value explicitly if a non standard value is required. In addition the warning message "oversized data" is replaced with a BUG_ON() statement assuring the limits defined and requested by zfcp. Signed-off-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
The timer_interval is 14 bits in width. Introduce a define for properly masking the value. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 22 7月, 2010 3 次提交
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由 Christof Schmitt 提交于
Commit 64deb6ef changed the way status read buffers are handled but forgot to adjust the mempool to the new size. Add the call to resize the mempool after the exchange config data. Also use the define instead of the hard coded number in the fsf callback for consistency. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Trying to read the FC host statistics on an offline adapter results in a 5 seconds wait. Reading the statistics tries to issue an exchange port data request which first waits up to 5 seconds for an entry in the request queue. Change the strategy for getting a free SBAL to exit when the queue is stopped. Reading the statistics will then fail without the wait. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Swen Schillig 提交于
A false check was performed whether an unchained ct_els is possible or not. Signed-off-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 03 5月, 2010 3 次提交
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由 Christof Schmitt 提交于
The FCP channel provides the number of status read buffers to issue. Use the provided number instead of the hardcoded number in zfcp. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Waiting for a free sbal is a operation on the qdio queue. Move the code implementing the wait to zfcp_qdio.c and rename the functions accordingly. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Move the code accessing the qdio sbales and zfcp_qdio_req struct to the zfcp_qdio files and provide helper functions for accessing the qdio related parts. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 12 4月, 2010 1 次提交
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由 Christof Schmitt 提交于
When a FSF request is returned with an error it should be reported through blktrace for the ziomon tools, but the latency information should not be read. Fix this by also calling zfcp_fsf_req_trace for the error case, but skip reading the latencies inside the function. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 30 3月, 2010 1 次提交
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由 Tejun Heo 提交于
include cleanup: Update gfp.h and slab.h includes to prepare for breaking 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: NTejun Heo <tj@kernel.org> Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
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- 18 2月, 2010 8 次提交
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由 Christof Schmitt 提交于
Move the qdio related structs and some helper functions to a new zfcp_qdio.h header file. While doing this, rename the struct zfcp_queue_req to zfcp_qdio_req to adhere to the naming scheme used in zfcp. This allows a better seperation of the qdio code and inlining the helper functions will save some function calls. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
The FC4 types are already available from exchange port. Use this for reporting the FC4 types, instead of having the value hardcoded in zfcp. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Move the decision which trace tag and trace level to use for the scsi result trace to zfcp_dbf.h. zfcp_dbf_scsi_result is already an inline function, so move the trace code there, simplifying the response handling in zfcp_fsf.c. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Kernel code uses dev as short name for the struct device. Rename the sysfs_device in zfcp_unit and zfcp_port to match this convention. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
zfcp_fsf_req_create assigns the same value twice to req_seq_no. Remove one assignment and move the req_id and seq_no assignments to one place. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
On a link down, the adapter reopen is not strictly necessary, but it helps flushing pending requests as quickly as possible. Add a comment mentioning this. qdio returning a problem on the response queue is an unlikely event. The recovery mentioned in the comment might resolve it, so implement it. This also has the advantage that it creates an entry in the recovery trace to see if and when this is occurring. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Move the code for tracking FSF requests to new file to have this code in one place. The functions for adding and removing requests on the I/O path are already inline. The alloc and free functions are only called once, so it does not hurt to inline them and add them to the same file. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Always use the FSF request id as a reference to the FSF request. With this change the function zfcp_reqlist_find_safe is no longer needed and can be removed. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 18 1月, 2010 1 次提交
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由 Swen Schillig 提交于
The hardware used with zfcp provides a timer for CT and ELS requests instead of an abort capability for these commands. To correctly handle the FC BSG timeouts, pass the timeout from the BSG requests to the hardware. Signed-off-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 05 12月, 2009 11 次提交
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由 Christof Schmitt 提交于
Enable the display of supported and active fc4s for zfcp in the FC transport class. zfcp only supports FCP, so simply hard-code this information. The zfcp hbaapi already has this information hardcoded, but this would allow to switch from the coding in the zfcp hbaapi to the common FC transport attributes in the future. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
The SCSI midlayer retries commands based on the remote port state and the command status reported by the driver. Returning DID_TRANSPORT_DISRUPTED is a better approach, use this for reporting FSF errors back to the SCSI midlayer. See http://marc.info/?l=linux-scsi&m=125668044215051&w=2 as reference. There is also no need in special treatment of ABORTED commands, so remove the ZFCP_STATUS_FSFREQ_ABORTED, the commands are then returned with DID_TRANSPORT_DISRUPTED. Also remove the ZFCP_STATUS_FSFREQ_RETRY: It is useless, no retry is happening in the FSF layer and nobody checks the state of this flag. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Remove some redundancies in FC related code and trace: - drop redundant data from SAN trace (local s_id that only changes during link down, ls_code that is already part of payload, d_id in ct response trace that is always the same as in ct request trace) - use one common fsf struct to hold zfcp data for ct and els requests - leverage common fsf struct for FC passthrough job data, allocate it with dd_bsg_data for passthrough requests and unify common code for ct and els passthrough request - simplify callback handling in zfcp_fc Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Instead of assigning 4 bytes with the highest byte masked out, use a 3 byte array with the ntoh24 and h24ton helper functions, thus eliminating the need for the ZFCP_DID_MASK. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
The well-known-address (WKA) port handling code is part of the FC code in zfcp. Move everything WKA related to the zfcp_fc files and use the common zfcp_fc prefix for structs and functions. Drop the unused key management service while renaming the struct, no request could ever reach this service in zfcp and it is obsolete anyway. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Use common code definitions for FC plogi, logo, rscn and adisc structs instead of inventing private ones. Move the private struct for issuing ELS ADISC inside zfcp to zfcp_fc header file. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Use common data structures for FCP CMND, FCP RSP and related definitions and remove zfcp private definitions. Split the FCP CMND setup and FCP RSP evaluation code in seperate functions. Use inline functions to not negatively impact the I/O path. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Swen Schillig 提交于
The port_scan work was scheduled to the work_queue provided by the kernel. This resulted on SMP systems to a likely situation that more than one scan_work were processed in parallel. This is not required and openes the possibility of race conditions between the removal of invalid ports and the enqueue of just scanned ports. This patch synchronizes the scan_work tasks by scheduling them to adapter local work_queue. Signed-off-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
The latencies traced per fsf request are traced for sysfs output and for blktrace, each in one function. Simplify the tracing code by merging both tracing functions into one. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Swen Schillig 提交于
Replace the local reference counting by already available mechanisms offered by kref. Where possible existing device structures were used, including the same functionality. Signed-off-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Swen Schillig 提交于
The global config_lock was used to protect the configuration organized in independent lists. It is not necessary to have a lock on driver level for this purpose. This patch replaces the global config_lock with a set of local list locks. Signed-off-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 22 10月, 2009 2 次提交
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由 Christof Schmitt 提交于
Add HZ since the start_timer function expects jiffies, not seconds. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
After opening a remote port zfcp checks if the WWPN returned in the PLOGI maches the WWPN of the port that should have been opened. On a mismatch zfcp assumes that the DID just changed, queries the FC nameserver and tries again. If the situation persists the erp will give up. With this strategy, if the remote port always returns the wrong PLOGI data, the remote port will not be opened. Introduce a warning, so that the system administrator knows why the remote port is not being opened and to have a pointer to investigate the problem on the storage system. Reviewed-by: NSwen Schillig <swen@vnet.ibm.com> Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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