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path: root/drivers/target/target_core_fabric_configfs.c
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2023-10-13scsi: target: Export fabric driver direct submit settingsMike Christie1-0/+24
This exports the fabric driver's direct submit settings, so users know what the driver supports. It will be helpful when they are exporting a device through different targets and one doesn't support direct submission. The new files allow the fabric to report what submission types they default to and if they support direct submission: default_submit_type: 1 - TARGET_DIRECT_SUBMIT - If the user has not requested a specific value then the fabric requests direct submission. 2 - TARGET_QUEUE_SUBMIT - If the user has not requested a specific value then the fabric requests queued submission. Note that these fabric values are based on what the fabric driver currently defaults to for compat with exiting setups. direct_submit_supported: 0 - The fabric does not support direct submission. 1 - The fabric supports direct submission. Signed-off-by: Mike Christie <michael.christie@oracle.com> Link: https://lore.kernel.org/r/20230928020907.5730-8-michael.christie@oracle.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-04-11scsi: target: core: Fix invalid memory accessMaurizio Lombardi1-4/+3
nr_attrs should start counting from zero, otherwise we will end up dereferencing an invalid memory address. $ targetcli /loopback create general protection fault RIP: 0010:configfs_create_file+0x12/0x70 Call Trace: <TASK> configfs_attach_item.part.0+0x5f/0x150 configfs_attach_group.isra.0+0x49/0x120 configfs_mkdir+0x24f/0x4d0 vfs_mkdir+0x192/0x240 do_mkdirat+0x131/0x160 __x64_sys_mkdir+0x48/0x70 do_syscall_64+0x5c/0x90 Fixes: 31177b74790c ("scsi: target: core: Add RTPI attribute for target port") Signed-off-by: Maurizio Lombardi <mlombard@redhat.com> Link: https://lore.kernel.org/r/20230407130033.556644-1-mlombard@redhat.com Acked-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-03-09scsi: target: core: Add RTPI attribute for target portDmitry Bogdanov1-2/+37
RELATIVE TARGET PORT IDENTIFIER can be read and configured via configfs: $ echo 0x10 > $TARGET/tpgt_N/rtpi RTPI can be changed only on disabled target ports. Co-developed-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Link: https://lore.kernel.org/r/20230301084512.21956-5-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-03-09scsi: target: core: Add RTPI field to target portDmitry Bogdanov1-5/+4
SAM-5 4.6.5.2 (Relative Port Identifier attribute) defines the attribute as unique across SCSI target ports. The change introduces RTPI attribute to se_portal group. The value is unique across all enabled SCSI target ports. It also limits number of SCSI target ports to 65535. Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Link: https://lore.kernel.org/r/20230301084512.21956-2-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2022-11-08scsi: target: Use kstrtobool() instead of strtobool()Christophe JAILLET1-1/+2
strtobool() is the same as kstrtobool(). However, the latter is more used within the kernel. In order to remove strtobool() and slightly simplify kstrtox.h, switch to the other function name. While at it, include the corresponding header file (<linux/kstrtox.h>) Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/fcddc0a53b4fc6e3c2e93592d3f61c5c63121855.1667336095.git.christophe.jaillet@wanadoo.fr Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-11-18scsi: target: configfs: Delete unnecessary checks for NULLDan Carpenter1-8/+8
The "item" pointer is always going to be valid pointer and does not need to be checked. But if "item" were NULL then item_to_lun() would not return a NULL, but instead, the container_of() pointer math would return a value in the error pointer range. This confuses static checkers since it looks like a NULL vs IS_ERR() bug. Delete the bogus checks. Link: https://lore.kernel.org/r/20211118084900.GA24550@kili Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-04scsi: target: core: Add common tpg/enable attributeDmitry Bogdanov1-2/+76
Many fabric modules provide their own implementation of enable attribute in tpg. Provide a way to remove code duplication in the fabric modules and automatically add "enable" attribute if a fabric module has an implementation of fabric_enable_tpg(). Link: https://lore.kernel.org/r/20210910084133.17956-2-d.bogdanov@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-04scsi: target: core: Make completion affinity configurableMike Christie1-0/+58
It may not always be best to complete the IO on same CPU as it was submitted on. This commit allows userspace to configure it. This has been useful for vhost-scsi where we have a single thread for submissions and completions. If we force the completion on the submission CPU we may be adding conflicts with what the user has setup in the lower levels with settings like the block layer rq_affinity or the driver's IRQ or softirq (the network's rps_cpus value) settings. We may also want to set it up where the vhost thread runs on CPU N and does its submissions/completions there, and then have LIO do its completion booking on CPU M, but can't configure the lower levels due to issues like using dm-multipath with lots of paths (the path selector can throw commands all over the system because it's only taking into account latency/throughput at its level). The new setting is in: /sys/kernel/config/target/$fabric/$target/param/cmd_completion_affinity Writing: -1 -> Gives the current default behavior of completing on the submission CPU. -2 -> Completes the cmd on the CPU the lower layers sent it to us from. > 0 -> Completes on the CPU userspace has specified. Link: https://lore.kernel.org/r/20210227170006.5077-26-michael.christie@oracle.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157Thomas Gleixner1-9/+1
Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-28scsi: target: drop unnecessary get_fabric_name() accessor from fabric_opsDavid Disseldorp1-1/+1
All fabrics return a const string. In all cases *except* iSCSI the get_fabric_name() string matches fabric_ops.name. Both fabric_ops.get_fabric_name() and fabric_ops.name are user-facing, with the former being used for PR/ALUA state and the latter for ConfigFS (config/target/$name), so we unfortunately need to keep both strings around for now. Replace the useless .get_fabric_name() accessor function with a const string fabric_name member variable. Signed-off-by: David Disseldorp <ddiss@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-07-30scsi: target: add helper to check if dev is configuredMike Christie1-1/+2
This just adds a helper function to check if a device is configured and it converts the target users to use it. The next patch will add a backend module user so those types of modules do not have to know the lio core details. Signed-off-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Xiubo Li <xiubli@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-07-02scsi: target: Remove second argument from fabric_make_tpg()Bart Van Assche1-1/+1
Since most target drivers do not use the second fabric_make_tpg() argument ("group") and since it is trivial to derive the group pointer from the wwn pointer, do not pass the group pointer to fabric_make_tpg(). Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Reviewed-by: Mike Christie <mchristi@redhat.com> Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Cc: Hannes Reinecke <hare@suse.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-11-04target: Move a declaration of a global variable into a header fileBart Van Assche1-2/+0
This patch avoids that sparse reports the following warning: drivers/target/target_core_configfs.c:2267:33: warning: symbol 'target_core_dev_item_ops' was not declared. Should it be static? Fixes: c17cd24959cd ("target/configfs: Kill se_device->dev_link_magic") Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Mike Christie <mchristi@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2017-06-08target/configfs: Kill se_lun->lun_link_magicNicholas Bellinger1-5/+8
Instead of using a hardcoded magic value in se_lun when verifying a target config_item symlink source during target_fabric_mappedlun_link(), go ahead and use target_fabric_port_item_ops directly instead. Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Mike Christie <mchristi@redhat.com> Cc: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2017-06-08target/configfs: Kill se_device->dev_link_magicNicholas Bellinger1-5/+7
Instead of using a hardcoded magic value in se_device when verifying a target config_item symlink source during target_fabric_port_link(), go ahead and use target_core_dev_item_ops directly instead. Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Mike Christie <mchristi@redhat.com> Cc: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2017-03-30target: Avoid mappedlun symlink creation during lun shutdownNicholas Bellinger1-0/+5
This patch closes a race between se_lun deletion during configfs unlink in target_fabric_port_unlink() -> core_dev_del_lun() -> core_tpg_remove_lun(), when transport_clear_lun_ref() blocks waiting for percpu_ref RCU grace period to finish, but a new NodeACL mappedlun is added before the RCU grace period has completed. This can happen in target_fabric_mappedlun_link() because it only checks for se_lun->lun_se_dev, which is not cleared until after transport_clear_lun_ref() percpu_ref RCU grace period finishes. This bug originally manifested as NULL pointer dereference OOPsen in target_stat_scsi_att_intr_port_show_attr_dev() on v4.1.y code, because it dereferences lun->lun_se_dev without a explicit NULL pointer check. In post v4.1 code with target-core RCU conversion, the code in target_stat_scsi_att_intr_port_show_attr_dev() no longer uses se_lun->lun_se_dev, but the same race still exists. To address the bug, go ahead and set se_lun>lun_shutdown as early as possible in core_tpg_remove_lun(), and ensure new NodeACL mappedlun creation in target_fabric_mappedlun_link() fails during se_lun shutdown. Reported-by: James Shen <jcs@datera.io> Cc: James Shen <jcs@datera.io> Tested-by: James Shen <jcs@datera.io> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-12-01fs: configfs: don't return anything from drop_linkAndrzej Pietrasiewicz1-4/+3
Documentation/filesystems/configfs/configfs.txt says: "When unlink(2) is called on the symbolic link, the source item is notified via the ->drop_link() method. Like the ->drop_item() method, this is a void function and cannot return failure." The ->drop_item() is indeed a void function, the ->drop_link() is actually not. This, together with the fact that the value of ->drop_link() is silently ignored suggests, that it is the ->drop_link() return type that should be corrected and changed to void. This patch changes drop_link() signature and all its users. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> [hch: reverted reformatting of some code] Signed-off-by: Christoph Hellwig <hch@lst.de>
2016-03-30target: add a new add_wwn_groups fabrics methodChristoph Hellwig1-0/+3
We need to have the WWN fully initialized before addig default groups to it, so add a new method to add these groups after the WWN has been initialized. Also remove the default groups in the core while we're at it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-30target: initialize the nacl base CIT begfore init_nodeaclChristoph Hellwig1-8/+9
The iSCSI targets wants to add a default group, for which we need to have the list of default groups initialized previously. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-30target: remove ->fabric_cleanup_nodeaclChristoph Hellwig1-3/+1
Instead we can clean up the list of default ACLs in core code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-22Merge branch 'for-next' of ↵Linus Torvalds1-18/+14
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "The highlights this round include: - Add target_alloc_session() w/ callback helper for doing se_session allocation + tag + se_node_acl lookup. (HCH + nab) - Tree-wide fabric driver conversion to use target_alloc_session() - Convert sbp-target to use percpu_ida tag pre-allocation, and TARGET_SCF_ACK_KREF I/O krefs (Chris Boot + nab) - Convert usb-gadget to use percpu_ida tag pre-allocation, and TARGET_SCF_ACK_KREF I/O krefs (Andrzej Pietrasiewicz + nab) - Convert xen-scsiback to use percpu_ida tag pre-allocation, and TARGET_SCF_ACK_KREF I/O krefs (Juergen Gross + nab) - Convert tcm_fc to use TARGET_SCF_ACK_KREF I/O + TMR krefs - Convert ib_srpt to use percpu_ida tag pre-allocation - Add DebugFS node for qla2xxx target sess list (Quinn) - Rework iser-target connection termination (Jenny + Sagi) - Convert iser-target to new CQ API (HCH) - Add pass-through WRITE_SAME support for IBLOCK (Mike Christie) - Introduce data_bitmap for asynchronous access of data area (Sheng Yang + Andy) - Fix target_release_cmd_kref shutdown comp leak (Himanshu Madhani) Also, there is a separate PULL request coming for cxgb4 NIC driver prerequisites for supporting hw iscsi segmentation offload (ISO), that will be the base for a number of v4.7 developments involving iscsi-target hw offloads" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (36 commits) target: Fix target_release_cmd_kref shutdown comp leak target: Avoid DataIN transfers for non-GOOD SAM status target/user: Report capability of handling out-of-order completions to userspace target/user: Fix size_t format-spec build warning target/user: Don't free expired command when time out target/user: Introduce data_bitmap, replace data_length/data_head/data_tail target/user: Free data ring in unified function target/user: Use iovec[] to describe continuous area target: Remove enum transport_lunflags_table target/iblock: pass WRITE_SAME to device if possible iser-target: Kill the ->isert_cmd back pointer in struct iser_tx_desc iser-target: Kill struct isert_rdma_wr iser-target: Convert to new CQ API iser-target: Split and properly type the login buffer iser-target: Remove ISER_RECV_DATA_SEG_LEN iser-target: Remove impossible condition from isert_wait_conn iser-target: Remove redundant wait in release_conn iser-target: Rework connection termination iser-target: Separate flows for np listeners and connections cma events iser-target: Add new state ISER_CONN_BOUND to isert_conn ...
2016-03-10target: Remove enum transport_lunflags_tableAndy Grover1-18/+14
se_dev_entry.lun_flags and se_lun.lun_access are only used for keeping track of read-write vs. read-only state. Since this is an either/or thing we can represent it as bool, and remove the unneeded enum transport_lunflags_table, which is left over from when there were more flags. Change code that uses this enum to just use true/false, and make it clear through variable and param names that true means read-only, false means read-write. Signed-off-by: Andy Grover <agrover@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-06configfs: switch ->default groups to a linked listChristoph Hellwig1-145/+49
Replace the current NULL-terminated array of default groups with a linked list. This gets rid of lots of nasty code to size and/or dynamically allocate the array. While we're at it also provide a conveniant helper to remove the default groups. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Felipe Balbi <balbi@kernel.org> [drivers/usb/gadget] Acked-by: Joel Becker <jlbec@evilplan.org> Acked-by: Nicholas Bellinger <nab@linux-iscsi.org> Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
2015-10-13target: use per-attribute show and store methodsChristoph Hellwig1-206/+69
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>
2015-07-30target: remove initiatorname field in se_acl_lunChris Zankel1-1/+1
From: Chris Zankel <czankel@purestorage.com> The initiatorname field in se_acl_lun is only a copy of the same field in se_node_acl, so remove it and use the version in se_node_acl where needed (it's actually only used for pr_debug) Signed-off-by: Chris Zankel <czankel@purestorage.com> Signed-off-by: Spencer Baugh <spencer.baugh@purestorage.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-06-23target: remove target_core_configfs.hChristoph Hellwig1-1/+0
The remaining defintions are private to the target core and can be merged into target_core_internal.h. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-06-15target: Remove TARGET_MAX_LUNS_PER_TRANSPORTHannes Reinecke1-8/+0
LUN allocation is now fully dynamic, so there is no need to artificially restrain the number of exported LUNs. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-06-15target: use 64-bit LUNsHannes Reinecke1-12/+6
As we're now using a list to hold the LUNs the target core can now converted to use 64-bit LUNs internally. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-06-01target: Subsume se_port + t10_alua_tg_pt_gp_member into se_lunChristoph Hellwig1-17/+15
This patch eliminates all se_port + t10_alua_tg_pt_gp_member usage, and converts current users to direct se_lun pointer dereference. This includes the removal of core_export_port(), core_release_port() core_dev_export() and core_dev_unexport(). Along with conversion of special case se_lun pointer dereference within PR ALL_TG_PT=1 and ALUA access state transition UNIT_ATTENTION handling. Also, update core_enable_device_list_for_node() to reference the new per se_lun->lun_deve_list when creating a new entry, or replacing an existing one via RCU. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-06-01target: Convert se_portal_group->tpg_lun_list[] to RCU hlistNicholas Bellinger1-14/+20
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>
2015-06-01target: Convert se_node_acl->device_list[] to RCU hlistNicholas Bellinger1-26/+17
This patch converts se_node_acl->device_list[] table for mappedluns to modern RCU hlist_head usage in order to support an arbitrary number of node_acl lun mappings. It converts transport_lookup_*_lun() fast-path code to use RCU read path primitives when looking up se_dev_entry. It adds a new hlist_head at se_node_acl->lun_entry_hlist for this purpose. For transport_lookup_cmd_lun() code, it works with existing per-cpu se_lun->lun_ref when associating se_cmd with se_lun + se_device. Also, go ahead and update core_create_device_list_for_node() + core_free_device_list_for_node() to use ->lun_entry_hlist. It also converts se_dev_entry->pr_ref_count access to use modern struct kref counting, and updates core_disable_device_list_for_node() to kref_put() and block on se_deve->pr_comp waiting for outstanding PR special-case PR references to drop, then invoke kfree_rcu() to wait for the RCU grace period to complete before releasing memory. So now that se_node_acl->lun_entry_hlist fast path access uses RCU protected pointers, go ahead and convert remaining non-fast path RCU updater code using ->lun_entry_lock to struct mutex to allow callers to block while walking se_node_acl->lun_entry_hlist. Finally drop the left-over core_clear_initiator_node_from_tpg() that originally cleared lun_access during se_node_acl shutdown, as post RCU conversion it now becomes duplicated logic. 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> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-30target: remove struct target_fabric_configfs_templateChristoph Hellwig1-25/+21
It's only embedded into struct target_fabric_configfs these days, so we might as well remove this layer of abstraction. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-30target: put struct target_fabric_configfs on a dietChristoph Hellwig1-2/+2
Remove all fields that are either unused or can be replaced by trivially following pointers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-30target: don't copy fabric opsChristoph Hellwig1-19/+19
Now that we don't need to set up ->tf_subsys we don't need to copy around the ops vector anymore. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-05-30target: refactor init/drop_nodeacl methodsChristoph Hellwig1-9/+13
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>
2015-04-14target: simplify the target template registration APIChristoph Hellwig1-12/+26
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>
2014-10-01target: Change core_dev_del_lun to take a se_lun instead of unpacked_lunAndy Grover1-1/+1
Remove core_tpg_pre_dellun entirely, since we don't need to get/check a pointer we already have. Nothing else can return an error, so core_dev_del_lun can return void. Rename core_tpg_post_dellun to remove_lun - a clearer name, now that pre_dellun is gone. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-09-17target: simplify target_fabric_make_lun error pathJoern Engel1-5/+2
Coverity complained that lun_cg has been dereferenced in all paths leading to NULL check. It didn't mention that only a single path could lead there and the code can be simplified even further. Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-09-17target: Fix memory leak on error in target_fabric_make_mappedlunJoern Engel1-1/+2
This patch fixes a memory leak on error in target_fabric_make_mappedlun(), where se_lun_acl memory does not get released on exit. Found by coverity. Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-09-15target/configfs: Remove unnecessary null testHimangi Saraogi1-2/+1
This patch removes the null test on lun_cg. lun_cg is initialized at the beginning of the function to &lun->lun_group. Since lun_cg is dereferenced prior to the null test, it must be a valid pointer. The following Coccinelle script is used for detecting the change: @r@ expression e,f; identifier g,y; statement S1,S2; @@ *e = &f->g <+... f->y ...+> *if (e != NULL || ...) S1 else S2 Signed-off-by: Himangi Saraogi <himangi774@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-12-16target: Fix sizeof in kmalloc for some default_groups arraysAndy Grover1-1/+1
Allocating an array of pointers, not the objects themselves. These two sites now match all the other sites. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-12-16target: Allocate more room for port default groupsAndy Grover1-1/+1
See target_stat_setup_port_default_groups, we need a 4 element array. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-10-16target: Remove TF_CIT_TMPL macroAndy Grover1-19/+19
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>
2013-09-10target: Update copyright ownership/year information to 2013Nicholas Bellinger1-1/+1
Update copyright ownership/year information for target-core, loopback, iscsi-target, tcm_qla2xx, vhost and iser-target. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-08-12target: replace strict_strto*() with kstrto*()Jingoo Han1-4/+12
The usage of strict_strtoul() and strict_strtoull() is not preferred, because strict_strtoul() and strict_strtoull() are obsolete. Thus, kstrtoul() and kstrtoull() should be used. v2: Fix incorrect return in ft_add_tpg (Fengguang) Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-03target: Add se_portal_group->tpg_auth_groupNicholas Bellinger1-2/+19
This patch adds an optional /auth/ configfs group to TPG context that can be used by fabrics like iscsi-target for TPG demo-mode authentication. Cc: Dax Kelson <dkelson@gurulabs.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-18target: Add missing mapped_lun bounds checking during make_mappedlun setupNicholas Bellinger1-0/+8
This patch adds missing bounds checking for the configfs provided mapped_lun value during target_fabric_make_mappedlun() setup ahead of se_lun_acl initialization. This addresses a potential OOPs when using a mapped_lun value that exceeds the hardcoded TRANSPORT_MAX_LUNS_PER_TPG-1 value within se_node_acl->device_list[]. Reported-by: Jan Engelhardt <jengelh@inai.de> Cc: Jan Engelhardt <jengelh@inai.de> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-18target: Fix lookup of dynamic NodeACLs during cached demo-mode operationNicholas Bellinger1-2/+2
This patch fixes a bug in core_tpg_check_initiator_node_acl() -> core_tpg_get_initiator_node_acl() where a dynamically created se_node_acl generated during session login would be skipped during subsequent lookup due to the '!acl->dynamic_node_acl' check, causing a new se_node_acl to be created with a duplicate ->initiatorname. This would occur when a fabric endpoint was configured with TFO->tpg_check_demo_mode()=1 + TPF->tpg_check_demo_mode_cache()=1 preventing the release of an existing se_node_acl during se_session shutdown. Also, drop the unnecessary usage of core_tpg_get_initiator_node_acl() within core_dev_init_initiator_node_lun_acl() that originally required the extra '!acl->dynamic_node_acl' check, and just pass the configfs provided se_node_acl pointer instead. Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-01-31target: Fix regression allowing unconfigured devices to fabric port linkNicholas Bellinger1-0/+5
This patch fixes a v3.8-rc1 regression bug where an unconfigured se_device was incorrectly allowed to perform a fabric port-link. This bug was introduced in commit: commit 0fd97ccf45be26fb01b3a412f1f6c6b5044b2f16 Author: Christoph Hellwig <hch@infradead.org> Date: Mon Oct 8 00:03:19 2012 -0400 target: kill struct se_subsystem_dev which ended up dropping the original se_subsystem_dev->se_dev_ptr check preventing this from happening with pre commit 0fd97ccf code. Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-12-05target: Add link_magic for fabric allow_link destination target_itemsNicholas Bellinger1-0/+12
This patch adds [dev,lun]_link_magic value assignment + checks within generic target_fabric_port_link() and target_fabric_mappedlun_link() code to ensure destination config_item *target_item sent from configfs_symlink() -> config_item_operations->allow_link() is the underlying se_device->dev_group and se_lun->lun_group that we expect to symlink. Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 00:09:19 +0000