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path: root/drivers/target/sbp
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2016-05-10target: make close_session optionalChristoph Hellwig1-6/+0
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-05-10target: make ->shutdown_session optionalChristoph Hellwig1-6/+0
Turns out the template and thus many drivers got the return value wrong: 0 means the fabrics driver needs to put a session reference, which no driver except for the iSCSI target drivers did. Fortunately none of these drivers supports explicit Node ACLs, so the bug was harmless. Even without that only qla2xxx and iscsi every did real work in shutdown_session, so get rid of the boilerplate code in all other drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-11sbp-target: Convert to TARGET_SCF_ACK_KREF I/O krefsNicholas Bellinger1-14/+16
This patch converts sbp-target to modern TARGET_SCF_ACK_KREF usage for sbp_send_status() callback path, and drops the now obsolete sbp_free_request() failure path calls. Acked-by: Chris Boot <bootc@bootc.net> Tested-by: Chris Boot <bootc@bootc.net> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-11sbp-target: Conversion to percpu_ida tag pre-allocationNicholas Bellinger1-6/+30
This patch converts sbp-target to use struct sbp_target_request descriptor tag pre-allocation using percpu_ida. (Fix sbp_mgt_get_req() IS_ERR failure checking - Dan Carpenter) (Add missing sbp_target_request tag memset - Chris Boot) Acked-by: Chris Boot <bootc@bootc.net> Tested-by: Chris Boot <bootc@bootc.net> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-11target: Convert demo-mode only drivers to target_alloc_sessionChristoph Hellwig1-25/+8
This patch converts existing loopback, usb-gadget, and xen-scsiback demo-mode only fabric drivers to use the new target_alloc_session API caller. This includes adding a new alloc_session callback for fabric driver internal nexus pointer assignments. (Fixes for early for-next nexus breakage - Dan Carpenter) Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Acked-by: Juergen Gross <jgross@suse.com> Tested-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Tested-by: Chris Boot <bootc@bootc.net> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07sbp-target: Remove a superfluous forward declarationBart Van Assche1-2/+0
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Chris Boot <bootc@bootc.net> Reviewed-by: Andy Grover <agrover@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-10-14target: use per-attribute show and store methodsChristoph Hellwig1-49/+38
This also allows to remove the target-specific old configfs macros, and gets rid of the target_core_fabric_configfs.h header which only had one function declaration left that could be moved to a better place. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org> Acked-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-07-05Merge branch 'for-next' of ↵Linus Torvalds2-232/+54
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "It's been a busy development cycle for target-core in a number of different areas. The fabric API usage for se_node_acl allocation is now within target-core code, dropping the external API callers for all fabric drivers tree-wide. There is a new conversion to RCU hlists for se_node_acl and se_portal_group LUN mappings, that turns fast-past LUN lookup into a completely lockless code-path. It also removes the original hard-coded limitation of 256 LUNs per fabric endpoint. The configfs attributes for backends can now be shared between core and driver code, allowing existing drivers to use common code while still allowing flexibility for new backend provided attributes. The highlights include: - Merge sbc_verify_dif_* into common code (sagi) - Remove iscsi-target support for obsolete IFMarker/OFMarker (Christophe Vu-Brugier) - Add bidi support in target/user backend (ilias + vangelis + agover) - Move se_node_acl allocation into target-core code (hch) - Add crc_t10dif_update common helper (akinobu + mkp) - Handle target-core odd SGL mapping for data transfer memory (akinobu) - Move transport ID handling into target-core (hch) - Move task tag into struct se_cmd + support 64-bit tags (bart) - Convert se_node_acl->device_list[] to RCU hlist (nab + hch + paulmck) - Convert se_portal_group->tpg_lun_list[] to RCU hlist (nab + hch + paulmck) - Simplify target backend driver registration (hch) - Consolidate + simplify target backend attribute implementations (hch + nab) - Subsume se_port + t10_alua_tg_pt_gp_member into se_lun (hch) - Drop lun_sep_lock for se_lun->lun_se_dev RCU usage (hch + nab) - Drop unnecessary core_tpg_register TFO parameter (nab) - Use 64-bit LUNs tree-wide (hannes) - Drop left-over TARGET_MAX_LUNS_PER_TRANSPORT limit (hannes)" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (76 commits) target: Bump core version to v5.0 target: remove target_core_configfs.h target: remove unused TARGET_CORE_CONFIG_ROOT define target: consolidate version defines target: implement WRITE_SAME with UNMAP bit using ->execute_unmap target: simplify UNMAP handling target: replace se_cmd->execute_rw with a protocol_data field target/user: Fix inconsistent kmap_atomic/kunmap_atomic target: Send UA when changing LUN inventory target: Send UA upon LUN RESET tmr completion target: Send UA on ALUA target port group change target: Convert se_lun->lun_deve_lock to normal spinlock target: use 'se_dev_entry' when allocating UAs target: Remove 'ua_nacl' pointer from se_ua structure target_core_alua: Correct UA handling when switching states xen-scsiback: Fix compile warning for 64-bit LUN target: Remove TARGET_MAX_LUNS_PER_TRANSPORT target: use 64-bit LUNs target: Drop duplicate + unused se_dev_check_wce target: Drop unnecessary core_tpg_register TFO parameter ...
2015-06-16target: Drop unnecessary core_tpg_register TFO parameterNicholas Bellinger1-1/+1
This patch drops unnecessary target_core_fabric_ops parameter usage for core_tpg_register() during fabric driver TFO->fabric_make_tpg() se_portal_group creation callback execution. Instead, use the existing se_wwn->wwn_tf->tf_ops pointer to ensure fabric driver is really using the same TFO provided at module_init time. Also go ahead and drop the forward TFO declarations tree-wide, and handling the special case for iscsi-target discovery TPG. Cc: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-06-02target: Minimize SCSI header #include directivesBart Van Assche1-1/+1
Only include SCSI initiator header files in target code that needs these header files, namely the SCSI pass-through code and the tcm_loop driver. Change SCSI_SENSE_BUFFERSIZE into TRANSPORT_SENSE_BUFFER in target code because the former is intended for initiator code and the latter for target code. With this patch the only initiator include directives in target code that remain are as follows: $ git grep -nHE 'include .scsi/(scsi.h|scsi_host.h|scsi_device.h|scsi_cmnd.h)' drivers/target drivers/infiniband/ulp/{isert,srpt} drivers/usb/gadget/legacy/tcm_*.[ch] drivers/{vhost,xen} include/{target,trace/events/target.h} drivers/target/loopback/tcm_loop.c:29:#include <scsi/scsi.h> drivers/target/loopback/tcm_loop.c:31:#include <scsi/scsi_host.h> drivers/target/loopback/tcm_loop.c:32:#include <scsi/scsi_device.h> drivers/target/loopback/tcm_loop.c:33:#include <scsi/scsi_cmnd.h> drivers/target/target_core_pscsi.c:39:#include <scsi/scsi_device.h> drivers/target/target_core_pscsi.c:40:#include <scsi/scsi_host.h> drivers/xen/xen-scsiback.c:52:#include <scsi/scsi_host.h> /* SG_ALL */ Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-06-01target: Drop lun_sep_lock for se_lun->lun_se_dev RCU usageNicholas Bellinger1-2/+5
With se_port and t10_alua_tg_pt_gp_member being absored into se_lun, there is no need for an extra lock to protect se_lun->lun_se_dev assignment. This patch also converts backend drivers to use call_rcu() release to allow any se_device readers to complete. The call_rcu() instead of kfree_rcu() is required here because se_device is embedded into the backend driver specific structure. Also, convert se_lun->lun_stats to use atomic_long_t within the target_complete_ok_work() completion callback, and add FIXME for transport_lookup_tmr_lun() with se_lun->lun_ref. Finally, update sbp_update_unit_directory() special case usage with proper rcu_dereference_raw() and configfs symlink comment. Reported-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Chris Boot <bootc@bootc.net> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-06-01target: Convert se_portal_group->tpg_lun_list[] to RCU hlistNicholas Bellinger2-56/+43
This patch converts the fixed size se_portal_group->tpg_lun_list[] to use modern RCU with hlist_head in order to support an arbitary number of se_lun ports per target endpoint. It includes dropping core_tpg_alloc_lun() from core_dev_add_lun(), and calling it directly from target_fabric_make_lun() to allocate a new se_lun. And add a new target_fabric_port_release() configfs item callback to invoke kfree_rcu() to release memory during se_lun->lun_group shutdown. Also now that se_node_acl->lun_entry_hlist is using RCU, convert existing tpg_lun_lock to struct mutex so core_tpg_add_node_to_devs() can perform RCU updater logic without releasing ->tpg_lun_mutex. Also, drop core_tpg_clear_object_luns() and it's single consumer in iscsi-target, which is duplicating TPG LUN shutdown logic and is current code results in a NOP. Finally, sbp-target and xen-scsiback fabric driver conversions are included, which are required due to the non-standard way they use ->tpg_lun_hlist. Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Chris Boot <bootc@bootc.net> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31target: target_core_configfs.h is not needed in fabric driversChristoph Hellwig1-1/+0
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31target: Move task tag into struct se_cmd + support 64-bit tagsBart Van Assche1-10/+2
Simplify target core and target drivers by storing the task tag a.k.a. command identifier inside struct se_cmd. For several transports (e.g. SRP) tags are 64 bits wide. Hence add support for 64-bit tags. (Fix core_tmr_abort_task conversion spec warnings - nab) (Fix up usb-gadget to use 16-bit tags - HCH + bart) Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andy Grover <agrover@redhat.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: <qla2xxx-upstream@qlogic.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Juergen Gross <jgross@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31target: move transport ID handling to the coreChristoph Hellwig1-70/+0
Now that struct se_portal_group contains a protocol identifier field we can take all the code to format an parse protocol identifiers in CDBs into common code instead of leaving this to low-level drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31target: remove the get_fabric_proto_ident methodChristoph Hellwig1-13/+0
Now that we store the protocol identifier in the tpg structure we don't need this method. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31target: change core_tpg_register prototypeChristoph Hellwig1-2/+1
Remove the unneeded fabric_ptr argument, and change the type argument to pass in a SPC protocol identifier. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31target: move node ACL allocation to core codeChristoph Hellwig1-14/+0
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31target: refactor init/drop_nodeacl methodsChristoph Hellwig1-32/+4
By always allocating and adding, respectively removing and freeing the se_node_acl structure in core code we can remove tons of repeated code in the init_nodeacl and drop_nodeacl routines. Additionally this now respects the get_default_queue_depth method in this code path as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31target: make the tpg_get_default_depth method optionalChristoph Hellwig1-6/+0
All fabric drivers except for iSCSI always return 1, so implement that as default behavior. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-31sbp_target: remove struct sbp_naclChristoph Hellwig2-30/+3
Except for the embedded struct se_node_acl none of the fields were ever used. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-04-14target: simplify the target template registration APIChristoph Hellwig1-58/+10
Instead of calling target_fabric_configfs_init() + target_fabric_configfs_register() / target_fabric_configfs_deregister() target_fabric_configfs_free() from every target driver, rewrite the API so that we have simple register/unregister functions that operate on a const operations vector. This patch also fixes a memory leak in several target drivers. Several target drivers namely called target_fabric_configfs_deregister() without calling target_fabric_configfs_free(). A large part of this patch is based on earlier changes from Bart Van Assche <bart.vanassche@sandisk.com>. (v2: Add a new TF_CIT_SETUP_DRV macro so that the core configfs code can declare attributes as either core only or for drivers) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-12-04scsi: remove MSG_*_TAG definesChristoph Hellwig1-1/+1
For SPI drivers use the message definitions from scsi.h, and for target drivers introduce a new TCM_*_TAG namespace. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com
2014-04-07target: Pass in transport supported PI at session initializationNicholas Bellinger1-1/+1
In order to support local WRITE_INSERT + READ_STRIP operations for non PI enabled fabrics, the fabric driver needs to be able signal what protection offload operations are supported. This is done at session initialization time so the modes can be signaled by individual se_wwn + se_portal_group endpoints, as well as optionally across different transports on the same endpoint. For iser-target, set TARGET_PROT_ALL if the underlying ib_device has already signaled PI offload support, and allow this to be exposed via a new iscsit_transport->iscsit_get_sup_prot_ops() callback. For loopback, set TARGET_PROT_ALL to signal SCSI initiator mode operation. For all other drivers, set TARGET_PROT_NORMAL to disable fabric level PI. Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-07target: Add TFO->abort_task for aborted task resources releaseNicholas Bellinger1-0/+6
Now that TASK_ABORTED status is not generated for all cases by TMR ABORT_TASK + LUN_RESET, a new TFO->abort_task() caller is necessary in order to give fabric drivers a chance to unmap hardware / software resources before the se_cmd descriptor is released via the normal TFO->release_cmd() codepath. This patch adds TFO->aborted_task() in core_tmr_abort_task() in place of the original transport_send_task_abort(), and also updates all fabric drivers to implement this caller. The fabric drivers that include changes to perform cleanup via ->aborted_task() are: - iscsi-target - iser-target - srpt - tcm_qla2xxx The fabric drivers that currently set ->aborted_task() to NOPs are: - loopback - tcm_fc - usb-gadget - sbp-target - vhost-scsi For the latter five, there appears to be no additional cleanup required before invoking TFO->release_cmd() to release the se_cmd descriptor. v2 changes: - Move ->aborted_task() call into transport_cmd_finish_abort (Alex) Cc: Alex Leung <amleung21@yahoo.com> Cc: Mark Rustad <mark.d.rustad@intel.com> Cc: Roland Dreier <roland@kernel.org> Cc: Vu Pham <vu@mellanox.com> Cc: Chris Boot <bootc@bootc.net> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Cc: Saurav Kashyap <saurav.kashyap@qlogic.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-10-17target: Remove TF_CIT_TMPL macroAndy Grover1-9/+9
Remove a lingering macro that just hid a dereference. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-08target: make queue_tm_rsp() return voidJoern Engel1-2/+1
The return value wasn't checked by any of the callers. Assuming this is correct behaviour, we can simplify some code by not bothering to generate it. nab: Add srpt_queue_data_in() + srpt_queue_tm_rsp() nops around srpt_queue_response() void return Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-03-02Merge branch 'for-next' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target patches from Nicholas Bellinger: "Here are the remaining target-pending patches for v3.9-rc1. The most important one here is the immediate queue starvation regression fix for iscsi-target, which addresses a bug that's effecting v3.5+ kernels under heavy sustained READ only workloads. Thanks alot to Benjamin Estrabaud for helping to track this down! Also included is a pSCSI exception bugfix from Asias, along with a handful of other minor changes. Both bugfixes are CC'ed to stable." * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: target/pscsi: Rename sg_num to nr_vecs in pscsi_get_bio() target/pscsi: Fix page increment target/pscsi: Drop unnecessary NULL assignment to bio->bi_next target: Add __exit annotation for module_exit functions iscsi-target: Fix immediate queue starvation regression with DATAIN
2013-02-28target: Add __exit annotation for module_exit functionsAsias He1-1/+1
Inclues sbp_exit, fileio_module_exit, iblock_module_exit and pscsi_module_exit. Note: rd_module_exit() can not be annotated by __exit, becasue it is called by target_core_init_configfs() which is annotated by __init. Signed-off-by: Asias He <asias@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-01-29Merge branch 'master' into for-nextJiri Kosina2-11/+15
Conflicts: drivers/devfreq/exynos4_bus.c Sync with Linus' tree to be able to apply patches that are against newer code (mvneta).
2013-01-09treewide: Fix typo in various driversMasanari Iida1-1/+1
Correct spelling typo in printk within various drivers. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-12-13sbp-target: fix error path in sbp_make_tpg()Chris Boot1-7/+10
If the TPG memory is allocated successfully, but we fail further along in the function, a dangling pointer to freed memory is left in the TPort structure. This is mostly harmless, but does prevent re-trying the operation without first removing the TPort altogether. Reported-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Chris Boot <bootc@bootc.net> Cc: Andy Grover <agrover@redhat.com> Cc: Nicholas A. Bellinger <nab@linux-iscsi.org> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-12-13sbp-target: use simple assignment in tgt_agent_rw_agent_state()Chris Boot1-3/+4
There is no need to memcpy() a 32-bit integer. The data pointer is guaranteed to be quadlet aligned by the FireWire stack so we can replace the memcpy() with an assignment. Thanks to Stefan Richter. Signed-off-by: Chris Boot <bootc@bootc.net> Cc: Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: Andy Grover <agrover@redhat.com> Cc: Clemens Ladisch <clemens@ladisch.de> Cc: Nicholas A. Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-11-08sbp-target: remove depends on CONFIG_EXPERIMENTALKees Cook1-1/+1
The CONFIG_EXPERIMENTAL config item has not carried much meaning for a while now and is almost always enabled by default. As agreed during the Linux kernel summit, remove it from any "depends on" lines in Kconfigs. CC: Chris Boot <bootc@bootc.net> CC: "Nicholas A. Bellinger" <nab@linux-iscsi.org> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-09-23sbp-target: fix return value check in sbp_register_configfs()Wei Yongjun1-2/+2
In case of error, the function target_fabric_configfs_init() returns ERR_PTR() not NULL pointer. The NULL test in the return value check should be replaced with IS_ERR(). dpatch engine is used to auto generated this patch. (https://github.com/weiyj/dpatch) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-09-18target: use list_move_tail instead of list_del/list_add_tailWei Yongjun1-2/+1
Using list_move_tail() instead of list_del() + list_add_tail(). spatch with a semantic match is used to found this problem. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-09-18target: Simplify fabric sense data length handlingRoland Dreier1-6/+0
Every fabric driver has to supply a se_tfo->set_fabric_sense_len() method, just so iSCSI can return an offset of 2. However, every fabric driver is already allocating a sense buffer and passing it into the target core, either via transport_init_se_cmd() or target_submit_cmd(). So instead of having iSCSI pass the start of its sense buffer into the core and then later tell the core to skip the first 2 bytes, it seems easier for iSCSI just to do the offset of 2 when it passes the sense buffer into the core. Then we can drop the se_tfo->set_fabric_sense_len() everywhere, and just add a couple of lines of code to iSCSI to set the sense data length to the beginning of the buffer right before it sends it over the network. (nab: Remove .set_fabric_sense_len usage from tcm_qla2xxx_npiv_ops + change transport_get_sense_buffer to follow v3.6-rc6 code w/o ->set_fabric_sense_len usage) Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-09-18target: Remove unused target_core_fabric_ops.get_fabric_sense_len methodRoland Dreier1-6/+0
There are no callers of se_tfo->get_fabric_sense_len(), so we should stop having every fabric driver implement it. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-09-18target/sbp: Remove strict param from sbp_parse_wwnAndy Grover1-4/+4
It's always set, and controls whether uppercase A-F are allowed hex values. I don't see a reason not to accept these. Signed-off-by: Andy Grover <agrover@redhat.com> Cc: Chris Boot <bootc@bootc.net> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-07-18target: Allow for target_submit_cmd() returning errorsRoland Dreier1-3/+5
We want it to be possible for target_submit_cmd() to return errors up to its fabric module callers. For now just update the prototype to return an int, and update all callers to handle non-zero return values as an error. This is immediately useful for tcm_qla2xxx to fix a long-standing active I/O session shutdown race, but tcm_fc, usb-gadget, and sbp-target the fabric maintainers need to check + ACK that handling a target_submit_cmd() failure due to session shutdown does not introduce regressions (nab: Respin against for-next after initial NACK + update docbook comment + fix double se_cmd init in exception path for usb-gadget) Cc: Chad Dupuis <chad.dupuis@qlogic.com> Cc: Arun Easi <arun.easi@qlogic.com> Cc: Chris Boot <bootc@bootc.net> Cc: Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: Mark Rustad <mark.d.rustad@intel.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Felipe Balbi <balbi@ti.com> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-07-17sbp-target: Consolidate duplicated error path code in sbp_handle_command()Roland Dreier1-16/+12
Cc: Chris Boot <bootc@bootc.net> Cc: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Roland Dreier <roland@purestorage.com>
2012-07-17target: remove transport_generic_process_writeChristoph Hellwig1-2/+1
Just call target_execute_cmd directly. Also, convert loopback, sbp, usb-gadget to use the newly exported target_execute_cmd(). Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-05-31sbp-target: rename a variable to avoid name clashStefan Richter1-4/+4
'int login_id' shadows 'static atomic_t login_id'. Seen as compilation warning on x86-32. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Chris Boot <bootc@bootc.net> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-05-10sbp-target: Initial merge of firewire/ieee-1394 target mode supportChris Boot4-0/+2884
The FireWire SBP-2 Target is a driver for using an IEEE-1394 connection as a SCSI transport. This module uses the SCSI Target framework to expose LUNs to other machines attached to a FireWire bus, in effect acting as a FireWire hard disk similar to FireWire Target Disk mode on many Apple computers. This commit contains the squashed pull from Chris Boot's SBP-2-Target: https://github.com/bootc/Linux-SBP-2-Target.git patch-v3 firewire-sbp-target: Add sbp_base.h header firewire-sbp-target: Add sbp_configfs.c firewire-sbp-target: Add sbp_fabric.{c,h} firewire-sbp-target: Add sbp_management_agent.{c,h} firewire-sbp-target: Add sbp_login.{c,h} firewire-sbp-target: Add sbp_target_agent.{c,h} firewire-sbp-target: Add sbp_scsi_cmnd.{c,h} firewire-sbp-target: Add to target Kconfig and Makefile Also add bootc's entry to the MAINTAINERS file. Great work Chris !! Signed-off-by: Chris Boot <bootc@bootc.net> Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: Andy Grover <agrover@redhat.com> Cc: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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