- 26 2月, 2011 4 次提交
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由 Christof Schmitt 提交于
Allocate the data for the GID_PN request through the new FC kmem_cache. While updating the GID_PN code, also introduce a helper function for initializing the CT header for FC nameserver requests. Remove the "paranoia" check as well, the GID_PN request data does not suddenly change. Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NSteffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
A data buffer that is passed to the hardware must not cross a page boundary. zfcp uses a series of kmem_caches to align the data to not cross a page boundary. Introduce a new kmem_cache for the FC requests sent from the zfcp driver and use it for the ELS ADISC data. The goal is to migrate to the FC kmem_cache in later patches and remove the request specific kmem_caches. Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NSteffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
zfcp requires a mempool for the status read data blocks to resubmit the "status read" requests at any time. Each status read data block has the size of a page (4096 bytes) and needs to be placed in one page. Instead of having a kmem_cache for allocating page sized chunks, use mempool_create_page_pool to create a mempool returning pages and remove the zfcp kmem_cache. Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NSteffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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由 Christof Schmitt 提交于
Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: NSteffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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- 17 9月, 2010 3 次提交
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由 Swen Schillig 提交于
Replace the zfcp_modify_<xxx>_status functions and its accompanying wrappers with dedicated status modifier functions. This eases code readability and maintenance. 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
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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由 Christof Schmitt 提交于
Add a new data structure zfcp_scsi_dev that holds zfcp private data for each SCSI device. Use scsi_transport_reserve_device to let the SCSI midlayer automatically allocate this with each SCSI device. 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 4 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 Christof Schmitt 提交于
Try to enable data division support for FCP devices and indicate in the adapter status flag if it succeeded. 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 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 Christof Schmitt 提交于
Configuring a LUN in zfcp, also creates a SCSI device. For consistency, it makes sense to remove the SCSI device when the LUN is deconfigured. Replace the flush_work with the call to scsi_remove_device: scsi_remove_device also takes the scan_mutex that synchronizes itself with any long running device discovery. 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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- 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
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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由 Christof Schmitt 提交于
Instead of dealing with large segments in the scatter-gather lists in zfcp_qdio.c, report the limits to the upper layers. With these limits in place, the code for mapping large data blocks to multiple sbales 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 2月, 2010 4 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
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
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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- 05 12月, 2009 13 次提交
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由 Christof Schmitt 提交于
The flag ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP is never set and hence can be removed. This is a leftover from the time when zfcp had to decide whether the target supports a "logical unit reset" or not. Nowadays, the SCSI midlayer calls the eh_device_reset_handler or the eh_target_reset_handler and zfcp simply maps this to a "logical unit reset" or a "target reset". 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
Introduce kmem_cache for ELS ADISC data to guarantee the required hardware alignment and free the allocated memory in case the send failes. 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 GPN_FT and GID_PN instead of inventing private ones. Move the private structs still required 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 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 flag ZFCP_STATUS_COMMON_REMOVE was used to indicate that a resource is not ready to be used or about to be removed from the system. This is now better done by an improved list handling and therefore the additional indicator is not required anymore. 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_mutex was required for the serialization of a configuration change within the zfcp driver. This global locking is now obsolete and can be removed. The requirement of serializing the access to a zfcp_adapter reference via a ccw_device is realized wth a static spinlock. 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
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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- 05 9月, 2009 9 次提交
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由 Heiko Carstens 提交于
Remove expensive ktime_get()/ktime_us_delta() functions from the hot path and use get_clock_monotonic() instead. This elimates seven function calls and avoids a lot of unnecessary calculations. Signed-off-by: NHeiko Carstens <heiko.carstens@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 Christof Schmitt 提交于
The config semaphore is only used as a mutex, so replace it with a simple mutex. 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 recommendation for a timeout of 2 * R_A_TOV is the same for ct/gs and els requests, so set it in the common function used for initializing both request types. Besides, the timer inside zfcp should only run longer than the timeout set for the channel, so 10 seconds more should be enough (instead of 60 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
Switch the creation of the zfcp erp thread from the deprecated kernel_thread API to the kthread API. This allows also the removal of some flags in zfcp since the kthread API handles thread creation and shutdown internally. To allow the usage of the kthread_stop function, replace the erp ready semaphore with a waitqueue for waiting until erp actions arrive on the ready queue. 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
Don't let the erp wait for gid_pn requests to complete. Instead, queue the gid_pn work, exit erp and let the finished gid_pn work trigger a new port reopen. 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 zfcp_adapter structure was growing over time to a size of almost one memory page. To reduce the size of the data structure and to seperate different layers, put all qdio related data in the new zfcp_qdio data structure. 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
Split all qdio related attributes out of zfcp_fsf_req and put it in new structure. 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
Remove the global driver work queue and replace it with a workqueue local to the adapter. The usage of this workqueue makes this the correct place for the structure. In addition multiple adapters won't block each other due to the serialization of the queued work. 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
Remove the special case for NO_QTCB requests and optimize the mempool and cache processing for fsfreqs. Especially use seperate mempools for the zfcp_fsf_req and zfcp_qtcb structs. 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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