#
becd9be6 |
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18-Mar-2023 |
Mike Christie <michael.christie@oracle.com> |
scsi: target: Move sess cmd counter to new struct iSCSI needs to wait on outstanding commands like how SRP and the FC/FCoE drivers do. It can't use target_stop_session() because for MCS support we can't stop the entire session during recovery because if other connections are OK then we want to be able to continue to execute I/O on them. Move the per session cmd counters to a new struct so iSCSI can allocate them per connection. The xcopy code can also just not allocate in the future since it doesn't need to track commands. Signed-off-by: Mike Christie <michael.christie@oracle.com> Link: https://lore.kernel.org/r/20230319015620.96006-2-michael.christie@oracle.com Reviewed-by: Maurizio Lombardi <mlombard@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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#
31177b74 |
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01-Mar-2023 |
Dmitry Bogdanov <d.bogdanov@yadro.com> |
scsi: target: core: Add RTPI attribute for target port 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>
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#
5fe99dac |
|
01-Mar-2023 |
Roman Bolshakov <r.bolshakov@yadro.com> |
scsi: target: core: Drop device-based RTPI The code is not needed since target port-based RTPI allocation replaced it. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Link: https://lore.kernel.org/r/20230301084512.21956-4-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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#
3f4b9cb4 |
|
01-Mar-2023 |
Dmitry Bogdanov <d.bogdanov@yadro.com> |
scsi: target: core: Add RTPI field to target port 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>
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#
6f55b06f |
|
01-Nov-2020 |
Mike Christie <michael.christie@oracle.com> |
scsi: target: Drop sess_cmd_lock from I/O path Drop the sess_cmd_lock by: - Removing the sess_cmd_list use from LIO core, because it's been moved to qla2xxx. - Removing sess_tearing_down check in the I/O path. Instead of using that bit and the sess_cmd_lock, we rely on the cmd_count percpu ref. To do this we switch to percpu_ref_kill_and_confirm/percpu_ref_tryget_live. Link: https://lore.kernel.org/r/1604257174-4524-7-git-send-email-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>
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#
69088a04 |
|
27-Apr-2020 |
Bodo Stroesser <bstroesser@ts.fujitsu.com> |
scsi: target: Make transport_flags per device pgr_support and alua_support device attributes show the inverted value of the transport_flags: * TRANSPORT_FLAG_PASSTHROUGH_PGR * TRANSPORT_FLAG_PASSTHROUGH_ALUA These attributes are per device, while the flags are per backend. Rename the transport_flags in backend/transport to transport_flags_default and use this value to initialize the new transport_flags field in the se_device structure. Now data and attribute both are per se_device. Link: https://lore.kernel.org/r/20200427150823.15350-4-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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#
27f722cc |
|
30-Sep-2019 |
Bart Van Assche <bvanassche@acm.org> |
scsi: target: Remove tpg_list and se_portal_group.se_tpg_node Maintaining tpg_list without ever iterating over it is not useful. Hence remove tpg_list. This patch does not change the behavior of the SCSI target code. Cc: Mike Christie <mchristie@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Link: https://lore.kernel.org/r/20190930232224.58980-1-bvanassche@acm.org Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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#
1a59d1b8 |
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27-May-2019 |
Thomas Gleixner <tglx@linutronix.de> |
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 Based on 1 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 you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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#
a95be384 |
|
27-Nov-2018 |
Bart Van Assche <bvanassche@acm.org> |
scsi: target/core: Simplify transport_clear_lun_ref() Since transport_clear_lun_ref() already waits until the percpu-refcount .release() method is called, it is not necessary to wait first until percpu_ref_kill_and_confirm() has finished transitioning the refcount into atomic mode. Remove the code that waits for percpu_ref_kill_and_confirm() to complete and also the completion object that is used by that code. This patch does not change the behavior of the SCSI target code. Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Disseldorp <ddiss@suse.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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#
30c7ca93 |
|
23-Nov-2018 |
David Disseldorp <ddiss@suse.de> |
scsi: target: drop unnecessary get_fabric_name() accessor from fabric_ops 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>
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#
6f48655f |
|
06-Aug-2017 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Fix node_acl demo-mode + uncached dynamic shutdown regression This patch fixes a generate_node_acls = 1 + cache_dynamic_acls = 0 regression, that was introduced by commit 01d4d673558985d9a118e1e05026633c3e2ade9b Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Wed Dec 7 12:55:54 2016 -0800 which originally had the proper list_del_init() usage, but was dropped during list review as it was thought unnecessary by HCH. However, list_del_init() usage is required during the special generate_node_acls = 1 + cache_dynamic_acls = 0 case when transport_free_session() does a list_del(&se_nacl->acl_list), followed by target_complete_nacl() doing the same thing. This was manifesting as a general protection fault as reported by Justin: kernel: general protection fault: 0000 [#1] SMP kernel: Modules linked in: kernel: CPU: 0 PID: 11047 Comm: iscsi_ttx Not tainted 4.13.0-rc2.x86_64.1+ #20 kernel: Hardware name: Intel Corporation S5500BC/S5500BC, BIOS S5500.86B.01.00.0064.050520141428 05/05/2014 kernel: task: ffff88026939e800 task.stack: ffffc90007884000 kernel: RIP: 0010:target_put_nacl+0x49/0xb0 kernel: RSP: 0018:ffffc90007887d70 EFLAGS: 00010246 kernel: RAX: dead000000000200 RBX: ffff8802556ca000 RCX: 0000000000000000 kernel: RDX: dead000000000100 RSI: 0000000000000246 RDI: ffff8802556ce028 kernel: RBP: ffffc90007887d88 R08: 0000000000000001 R09: 0000000000000000 kernel: R10: ffffc90007887df8 R11: ffffea0009986900 R12: ffff8802556ce020 kernel: R13: ffff8802556ce028 R14: ffff8802556ce028 R15: ffffffff88d85540 kernel: FS: 0000000000000000(0000) GS:ffff88027fc00000(0000) knlGS:0000000000000000 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kernel: CR2: 00007fffe36f5f94 CR3: 0000000009209000 CR4: 00000000003406f0 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kernel: Call Trace: kernel: transport_free_session+0x67/0x140 kernel: transport_deregister_session+0x7a/0xc0 kernel: iscsit_close_session+0x92/0x210 kernel: iscsit_close_connection+0x5f9/0x840 kernel: iscsit_take_action_for_connection_exit+0xfe/0x110 kernel: iscsi_target_tx_thread+0x140/0x1e0 kernel: ? wait_woken+0x90/0x90 kernel: kthread+0x124/0x160 kernel: ? iscsit_thread_get_cpumask+0x90/0x90 kernel: ? kthread_create_on_node+0x40/0x40 kernel: ret_from_fork+0x22/0x30 kernel: Code: 00 48 89 fb 4c 8b a7 48 01 00 00 74 68 4d 8d 6c 24 08 4c 89 ef e8 e8 28 43 00 48 8b 93 20 04 00 00 48 8b 83 28 04 00 00 4c 89 ef <48> 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 83 20 kernel: RIP: target_put_nacl+0x49/0xb0 RSP: ffffc90007887d70 kernel: ---[ end trace f12821adbfd46fed ]--- To address this, go ahead and use proper list_del_list() for all cases of se_nacl->acl_list deletion. Reported-by: Justin Maggard <jmaggard01@gmail.com> Tested-by: Justin Maggard <jmaggard01@gmail.com> Cc: Justin Maggard <jmaggard01@gmail.com> Cc: stable@vger.kernel.org # 4.1+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
9ae0e9ad |
|
01-Jun-2017 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target/configfs: Kill se_lun->lun_link_magic 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>
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#
46861cdd |
|
25-Apr-2017 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Don't force session reset if queue_depth does not change Keeping in the idempotent nature of target_core_fabric_configfs.c, if a queue_depth value is set and it's the same as the existing value, don't attempt to force session reinstatement. Reported-by: Raghu Krishnamurthy <rk@datera.io> Cc: Raghu Krishnamurthy <rk@datera.io> Tested-by: Gary Guo <ghg@datera.io> Cc: Gary Guo <ghg@datera.io> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
49cb77e2 |
|
27-Mar-2017 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Avoid mappedlun symlink creation during lun shutdown 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>
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#
530c6891 |
|
01-Mar-2017 |
Mike Christie <mchristi@redhat.com> |
target: allow ALUA setup for some passthrough backends This patch allows passthrough backends to use the core/base LIO ALUA setup and state checks, but still handle the execution of commands. This will allow the target_core_user module to execute STPG and RTPG in userspace, and not have to duplicate the ALUA state checks, path information (needed so we can check if command is executable on specific paths) and setup (rtslib sets/updates the configfs ALUA interface like it does for iblock or file). For STPG, the target_core_user userspace daemon, tcmu-runner will still execute the STPG, and to update the core/base LIO state it will use the existing configfs interface. For RTPG, tcmu-runner will loop over configfs and/or cache the state. Signed-off-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
bd4e2d29 |
|
22-Feb-2017 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Fix NULL dereference during LUN lookup + active I/O shutdown When transport_clear_lun_ref() is shutting down a se_lun via configfs with new I/O in-flight, it's possible to trigger a NULL pointer dereference in transport_lookup_cmd_lun() due to the fact percpu_ref_get() doesn't do any __PERCPU_REF_DEAD checking before incrementing lun->lun_ref.count after lun->lun_ref has switched to atomic_t mode. This results in a NULL pointer dereference as LUN shutdown code in core_tpg_remove_lun() continues running after the existing ->release() -> core_tpg_lun_ref_release() callback completes, and clears the RCU protected se_lun->lun_se_dev pointer. During the OOPs, the state of lun->lun_ref in the process which triggered the NULL pointer dereference looks like the following on v4.1.y stable code: struct se_lun { lun_link_magic = 4294932337, lun_status = TRANSPORT_LUN_STATUS_FREE, ..... lun_se_dev = 0x0, lun_sep = 0x0, ..... lun_ref = { count = { counter = 1 }, percpu_count_ptr = 3, release = 0xffffffffa02fa1e0 <core_tpg_lun_ref_release>, confirm_switch = 0x0, force_atomic = false, rcu = { next = 0xffff88154fa1a5d0, func = 0xffffffff8137c4c0 <percpu_ref_switch_to_atomic_rcu> } } } To address this bug, use percpu_ref_tryget_live() to ensure once __PERCPU_REF_DEAD is visable on all CPUs and ->lun_ref has switched to atomic_t, all new I/Os will fail to obtain a new lun->lun_ref reference. Also use an explicit percpu_ref_kill_and_confirm() callback to block on ->lun_ref_comp to allow the first stage and associated RCU grace period to complete, and then block on ->lun_ref_shutdown waiting for the final percpu_ref_put() to drop the last reference via transport_lun_remove_cmd() before continuing with core_tpg_remove_lun() shutdown. Reported-by: Rob Millner <rlm@daterainc.com> Tested-by: Rob Millner <rlm@daterainc.com> Cc: Rob Millner <rlm@daterainc.com> Tested-by: Vaibhav Tandon <vst@datera.io> Cc: Vaibhav Tandon <vst@datera.io> Tested-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Cc: <stable@vger.kernel.org> # v3.14+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
2bce1a6d |
|
09-Dec-2016 |
Bart Van Assche <bvanassche@acm.org> |
IB/srpt: Accept GUIDs as port names Port and ACL information must be configured before an initiator logs in. Make it possible to configure this information before a subnet prefix has been assigned to a port by not only accepting GIDs as target port and initiator port names but by also accepting port GUIDs. Add a 'priv' member to struct se_wwn to allow target drivers to associate their own data with struct se_wwn. Reported-by: Doug Ledford <dledford@redhat.com> References: http://www.spinics.net/lists/linux-rdma/msg39505.html Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
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#
d94331fa |
|
02-May-2016 |
Christoph Hellwig <hch@lst.de> |
target: remove sess_kref and ->shutdown_session Both of them are unused now that drivers handle any delayed session shutdown internally. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
22d11759 |
|
02-May-2016 |
Christoph Hellwig <hch@lst.de> |
target: make ->shutdown_session optional 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>
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#
fba81f88 |
|
02-May-2016 |
Christoph Hellwig <hch@lst.de> |
target: remove acl_stop Ensure we can use list_empty on the sess_acl_list to remove the need for this flag. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
bc6e6bb4 |
|
02-May-2016 |
Christoph Hellwig <hch@lst.de> |
target: consolidate and fix session shutdown Factor out a helper to shutdown sessions for a Node ACL, and make it properly restart the list walk after dropping the lock. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
03a68b44 |
|
25-Feb-2016 |
Andy Grover <agrover@redhat.com> |
target: Remove enum transport_lunflags_table 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>
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#
21aaa23b |
|
07-Jan-2016 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Obtain se_node_acl->acl_kref during get_initiator_node_acl This patch addresses a long standing race where obtaining se_node_acl->acl_kref in __transport_register_session() happens a bit too late, and leaves open the potential for core_tpg_del_initiator_node_acl() to hit a NULL pointer dereference. Instead, take ->acl_kref in core_tpg_get_initiator_node_acl() while se_portal_group->acl_node_mutex is held, and move the final target_put_nacl() from transport_deregister_session() into transport_free_session() so that fabric driver login failure handling using the modern method to still work as expected. Also, update core_tpg_get_initiator_node_acl() to take an extra reference for dynamically generated acls for demo-mode, before returning to fabric caller. Also update iscsi-target sendtargets special case handling to use target_tpg_has_node_acl() when checking if demo_mode_discovery == true during discovery lookup. Note the existing wait_for_completion(&acl->acl_free_comp) in core_tpg_del_initiator_node_acl() does not change. Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
d36ad77f |
|
07-Jan-2016 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Convert ACL change queue_depth se_session reference usage This patch converts core_tpg_set_initiator_node_queue_depth() to use struct se_node_acl->acl_sess_list when performing explicit se_tpg_tfo->shutdown_session() for active sessions, in order for new se_node_acl->queue_depth to take effect. This follows how core_tpg_del_initiator_node_acl() currently works when invoking se_tpg_tfo->shutdown-session(), and ahead of the next patch to take se_node_acl->acl_kref during lookup, the extra get_initiator_node_acl() can go away. In order to achieve this, go ahead and change target_get_session() to use kref_get_unless_zero() and propigate up the return value to know when a session is already being released. This is because se_node_acl->acl_group is already protecting se_node_acl->acl_group reference via configfs, and shutdown within core_tpg_del_initiator_node_acl() won't occur until sys_write() to core_tpg_set_initiator_node_queue_depth() attribute returns back to user-space. Also, drop the left-over iscsi-target hack, and obtain se_portal_group->session_lock in lio_tpg_shutdown_session() internally. Remove iscsi-target wrapper and unused se_tpg + force parameters and associated code. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
dba5ccc7 |
|
05-Jan-2016 |
Bart Van Assche <bvanassche@acm.org> |
target: Remove an unused variable The num_node_acls member in struct se_portal_group is modified by several functions but is never read. Hence remove it. 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> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
eeeb9522 |
|
15-Sep-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Propigate backend read-only to core_tpg_add_lun This patch adds a DF_READ_ONLY flag that is used by IBLOCK to signal when a backend has been set to read-only mode, in order to propigate read-only status up to core_tpg_add_lun() for all future LUN fabric exports. With this is place, existing emulation for reporting read-only in spc_emulate_modesense() and normal transport_lookup_cmd_lun() TCM_WRITE_PROTECTED status checking just works as expected. Reported-by: Joeue Deng <joeue404@gmail.com> Reported-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
e986a35a |
|
18-Jun-2015 |
Hannes Reinecke <hare@suse.de> |
tcm_loop: Send I_T_NEXUS_LOSS_OCCURRED UA If the virtual SAS link is set to 'offline' we should be queueing an I_T_NEXUS_LOSS_OCCURRED UA. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
6de2ce5b |
|
19-Jun-2015 |
Christoph Hellwig <hch@lst.de> |
target: remove target_core_configfs.h 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>
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#
196e2e2a |
|
10-Jun-2015 |
Hannes Reinecke <hare@suse.de> |
target: Remove TARGET_MAX_LUNS_PER_TRANSPORT 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>
|
#
f2d30680 |
|
10-Jun-2015 |
Hannes Reinecke <hare@suse.de> |
target: use 64-bit LUNs 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>
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#
bc0c94b1 |
|
20-May-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Drop unnecessary core_tpg_register TFO parameter 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>
|
#
ba929992 |
|
08-May-2015 |
Bart Van Assche <bvanassche@acm.org> |
target: Minimize SCSI header #include directives 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>
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#
9e37d042 |
|
20-May-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Drop se_lun->lun_active for existing percpu lun_ref With se_port_t and t10_alua_tg_pt_gp_member being absored into se_lun, there is no need for an extra atomic_t based reference count for PR ALL_TG_PT=1 and ALUA access state transition. Go ahead and use the existing percpu se_lun->lun_ref instead, and convert the two special cases to percpu_ref_tryget_live() to avoid se_lun if transport_clear_lun_ref() has already been invoked to shutdown the se_lun. Cc: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
|
#
4cc987ea |
|
19-May-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Drop lun_sep_lock for se_lun->lun_se_dev RCU usage 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>
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#
adf653f9 |
|
25-May-2015 |
Christoph Hellwig <hch@lst.de> |
target: Subsume se_port + t10_alua_tg_pt_gp_member into se_lun 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>
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#
b3eeea66 |
|
19-May-2015 |
Bart Van Assche <bvanassche@acm.org> |
target: Simplify LUN shutdown code Instead of starting a thread from transport_clear_lun_ref() that waits for LUN shutdown, wait in that function for LUN shutdown to finish. Additionally, change the return type of transport_clear_lun_ref() from int to void. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
|
#
46247737 |
|
24-May-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Drop left-over se_lun->lun_status Now that se_portal_group->tpg_lun_hlist is a RCU protected hlist, go ahead and drop the left-over lun->lun_status usage. Reported-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
df9766ca |
|
21-May-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Only reset specific dynamic entries during lun_group creation This patch changes core_tpg_add_node_to_devs() to avoid unnecessarly resetting every se_dev_entry in se_node_acl->tpg_lun_hlist when the operation is driven by an explicit configfs se_lun->lun_group creation via core_dev_add_lun() to only update a single se_lun. Otherwise for the second core_tpg_check_initiator_node_acl() case, go ahead and continue to scan the full set of currently active se_lun in se_portal_group->tpg_lun_hlist. Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
84786546 |
|
08-Mar-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Drop unused se_lun->lun_acl_list Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
22793de5 |
|
06-Mar-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Convert core_tpg_deregister to use list splice This patch converts core_tpg_deregister() to perform a list splice for any remaining dynamically generated se_node_acls attached to se_tpg, before calling kfree(nacl) to free memory. Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
403edd78 |
|
08-Mar-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Convert se_tpg->acl_node_lock to ->acl_node_mutex This patch converts se_tpg->acl_node_lock to struct mutex, so that ->acl_node_acl walkers in core_clear_lun_from_tpg() can block when calling core_disable_device_list_for_node(). It also updates core_dev_add_lun() to hold ->acl_node_mutex when calling core_tpg_add_node_to_devs() to build ->lun_entry_hlist for dynamically generated se_node_acl. Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
6bb82612 |
|
10-May-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Convert se_portal_group->tpg_lun_list[] to RCU hlist 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>
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#
29a05dee |
|
22-Mar-2015 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Convert se_node_acl->device_list[] to RCU hlist 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>
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#
e4aae5af |
|
01-May-2015 |
Christoph Hellwig <hch@lst.de> |
target: change core_tpg_register prototype 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>
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#
144bc4c2 |
|
13-Apr-2015 |
Christoph Hellwig <hch@lst.de> |
target: move node ACL allocation to core code Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
e413f472 |
|
13-Apr-2015 |
Christoph Hellwig <hch@lst.de> |
target: refactor node ACL allocation Split out two common helpers to share code for allocating and initializing node ACLs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
c7d6a803 |
|
13-Apr-2015 |
Christoph Hellwig <hch@lst.de> |
target: refactor init/drop_nodeacl methods 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>
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#
e1750d20 |
|
13-Apr-2015 |
Christoph Hellwig <hch@lst.de> |
target: make the tpg_get_default_depth method optional 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>
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#
9ac8928e |
|
08-Apr-2015 |
Christoph Hellwig <hch@lst.de> |
target: simplify the target template registration API 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>
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#
e2480563 |
|
03-Oct-2014 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Fix APTPL metadata handling for dynamic MappedLUNs This patch fixes a bug in handling of SPC-3 PR Activate Persistence across Target Power Loss (APTPL) logic where re-creation of state for MappedLUNs from dynamically generated NodeACLs did not occur during I_T Nexus establishment. It adds the missing core_scsi3_check_aptpl_registration() call during core_tpg_check_initiator_node_acl() -> core_tpg_add_node_to_devs() in order to replay any pre-loaded APTPL metadata state associated with the newly connected SCSI Initiator Port. Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
9c7d6154 |
|
30-Jun-2014 |
Andy Grover <agrover@redhat.com> |
target: Remove core_tpg_release_virtual_lun0 function Simple and just called from one place. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
cd9d7cba |
|
30-Jun-2014 |
Andy Grover <agrover@redhat.com> |
target: Change core_dev_del_lun to take a se_lun instead of unpacked_lun 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>
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#
cc83881f |
|
30-Jun-2014 |
Andy Grover <agrover@redhat.com> |
target: core_tpg_post_dellun can return void Nothing in it can raise an error. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
2aad2a86 |
|
24-Sep-2014 |
Tejun Heo <tj@kernel.org> |
percpu_ref: add PERCPU_REF_INIT_* flags With the recent addition of percpu_ref_reinit(), percpu_ref now can be used as a persistent switch which can be turned on and off repeatedly where turning off maps to killing the ref and waiting for it to drain; however, there currently isn't a way to initialize a percpu_ref in its off (killed and drained) state, which can be inconvenient for certain persistent switch use cases. Similarly, percpu_ref_switch_to_atomic/percpu() allow dynamic selection of operation mode; however, currently a newly initialized percpu_ref is always in percpu mode making it impossible to avoid the latency overhead of switching to atomic mode. This patch adds @flags to percpu_ref_init() and implements the following flags. * PERCPU_REF_INIT_ATOMIC : start ref in atomic mode * PERCPU_REF_INIT_DEAD : start ref killed and drained These flags should be able to serve the above two use cases. v2: target_core_tpg.c conversion was missing. Fixed. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Hellwig <hch@infradead.org> Cc: Johannes Weiner <hannes@cmpxchg.org>
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#
a34375ef |
|
07-Sep-2014 |
Tejun Heo <tj@kernel.org> |
percpu-refcount: add @gfp to percpu_ref_init() Percpu allocator now supports allocation mask. Add @gfp to percpu_ref_init() so that !GFP_KERNEL allocation masks can be used with percpu_refs too. This patch doesn't make any functional difference. v2: blk-mq conversion was missing. Updated. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Kent Overstreet <koverstreet@google.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Li Zefan <lizefan@huawei.com> Cc: Nicholas A. Bellinger <nab@linux-iscsi.org> Cc: Jens Axboe <axboe@kernel.dk>
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#
9a1049da |
|
28-Jun-2014 |
Tejun Heo <tj@kernel.org> |
percpu-refcount: require percpu_ref to be exited explicitly Currently, a percpu_ref undoes percpu_ref_init() automatically by freeing the allocated percpu area when the percpu_ref is killed. While seemingly convenient, this has the following niggles. * It's impossible to re-init a released reference counter without going through re-allocation. * In the similar vein, it's impossible to initialize a percpu_ref count with static percpu variables. * We need and have an explicit destructor anyway for failure paths - percpu_ref_cancel_init(). This patch removes the automatic percpu counter freeing in percpu_ref_kill_rcu() and repurposes percpu_ref_cancel_init() into a generic destructor now named percpu_ref_exit(). percpu_ref_destroy() is considered but it gets confusing with percpu_ref_kill() while "exit" clearly indicates that it's the counterpart of percpu_ref_init(). All percpu_ref_cancel_init() users are updated to invoke percpu_ref_exit() instead and explicit percpu_ref_exit() calls are added to the destruction path of all percpu_ref users. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Benjamin LaHaise <bcrl@kvack.org> Cc: Kent Overstreet <kmo@daterainc.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Nicholas A. Bellinger <nab@linux-iscsi.org> Cc: Li Zefan <lizefan@huawei.com>
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#
de06875f |
|
26-Nov-2013 |
Andy Grover <agrover@redhat.com> |
target: Remove extra percpu_ref_init lun->lun_ref is also initialized in core_tpg_post_addlun, so it doesn't need to be done in core_tpg_setup_virtual_lun0. (nab: Drop left-over percpu_ref_cancel_init in failure path) Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
340dbf72 |
|
12-Dec-2013 |
Andy Grover <agrover@redhat.com> |
target: Don't use void* when passing dev in core_tpg_add_lun Especially since it's actually a device. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
d344f8a1 |
|
26-Nov-2013 |
Andy Grover <agrover@redhat.com> |
target: Rename core_tpg_{pre,post}_addlun for clarity "pre" is really an allocation function. The only time it isn't called is for virtual_lun0, which is statically allocated. Renaming that to "alloc" lets the other function not need to be "post", and just be called core_tpg_add_lun. (nab: fix minor applying fuzz in core_tpg_setup_virtual_lun0) Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
a51d5229 |
|
23-Nov-2013 |
Roland Dreier <roland@purestorage.com> |
target: Remove write-only stats fields and lock from struct se_node_acl Commit 04f3b31bff72 ("iscsi-target: Convert iscsi_session statistics to atomic_long_t") removed the updating of these fields in iscsi (the only fabric driver that ever touched these counters), and the core has no way to report or otherwise use the values. Remove the last remnants of these counters. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
|
#
4a9a6c8d |
|
06-Nov-2013 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Drop left-over se_lun->lun_cmd_list shutdown code Now with percpu refcounting for se_lun in place, go ahead and drop the legacy per se_cmd accounting for se_lun shutdown. This includes __transport_clear_lun_from_sessions(), the associated transport_lun_wait_for_tasks() logic, along with a handful of now unused se_cmd structure members and ->transport_state bits. Cc: Kent Overstreet <kmo@daterainc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
|
#
5277797d |
|
06-Nov-2013 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Add percpu refcounting for se_lun access This patch adds percpu refcounting for se_lun access that allows the association of an se_lun + se_cmd in transport_lookup_cmd_lun() to occur without an extra list_head for tracking outstanding I/O during se_lun shutdown. This effectively changes se_lun shutdown logic to wait for outstanding I/O percpu references to complete in transport_lun_remove_cmd() using se_lun->lun_ref_comp, instead of explicitly draining the per se_lun command list and waiting for individual se_cmd descriptor processing to complete. Cc: Kent Overstreet <kmo@daterainc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
|
#
b3fde035 |
|
07-Oct-2013 |
Thomas Glanzmann <thomas@glanzmann.de> |
target: Export symbol core_tpg_check_initiator_node_acl Export symbol core_tpg_check_initiator_node_acl and move prototype from the private drivers/target/target_core_internal.h to the public include/target/target_core_fabric.h Signed-off-by: Thomas Glanzmann <thomas@glanzmann.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
|
#
4c76251e |
|
05-Sep-2013 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Update copyright ownership/year information to 2013 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>
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#
0fb889b8 |
|
15-Mar-2013 |
Wei Yongjun <yongjun_wei@trendmicro.com.cn> |
target: fix possible memory leak in core_tpg_register() 'se_tpg->tpg_lun_list' is malloced in core_tpg_register() and should be freed before leaving from the error handling cases, otherwise it will cause memory leak. 'se_tpg' is malloced out of this function, and will be freed if we return error, so remove free for 'se_tpg'. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
fcf29481 |
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18-Feb-2013 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Fix lookup of dynamic NodeACLs during cached demo-mode operation 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>
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#
79e62fc3 |
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11-Dec-2012 |
Andy Grover <agrover@redhat.com> |
target/iscsi_target: Add NodeACL tags for initiator group support Thanks for reviews, looking a lot better. ---- 8< ---- Initiator access config could be easier. The way other storage vendors have addressed this is to support initiator groups: the admin adds initiator WWNs to the group, and then LUN permissions can be granted for the entire group at once. Instead of changing ktarget's configfs interface, this patch keeps the configfs interface per-initiator-wwn and just adds a 'tag' field for each. This should be enough for user tools like targetcli to group initiator ACLs and sync their configurations. acl_tag is not used internally, but needs to be kept in configfs so that all user tools can avoid dependencies on each other. Code tested to work, although userspace pieces still to be implemented. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
0ff87549 |
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05-Dec-2012 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Add link_magic for fabric allow_link destination target_items 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>
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#
fd9a11d7 |
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09-Nov-2012 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Update copyright information to 2012 v2: Use correct target_core_stat.c 2006 copyright year v3: Drop extra unnessary legal verbage from header (hch) Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
35d1efe8 |
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16-Aug-2012 |
Masanari Iida <standby24x7@gmail.com> |
target: Fix minor spelling typos in drivers/target Correct spelling typo in printk and comment within drivers/target. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
e80ac6c4 |
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12-Jul-2012 |
Andy Grover <agrover@redhat.com> |
target: refactor core_update_device_list_for_node() Code was almost entirely divided based on value of bool param "enable". Split it into two functions. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
cdf88a2f |
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12-Jul-2012 |
Andy Grover <agrover@redhat.com> |
target: Eliminate else using boolean logic Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
cfebf8f4 |
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10-May-2012 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Drop incorrect se_lun_acl release for dynamic -> explict ACL conversion This patch removes some potentially problematic legacy code within core_clear_initiator_node_from_tpg() that was originally intended to release left over se_lun_acl setup during dynamic NodeACL+MappedLUN generate when running with TPG demo-mode operation. Since we now only ever expect to allocate and release se_lun_acl from within target_core_fabric_configfs.c:target_fabric_make_mappedlun() and target_fabric_drop_mappedlun() context respectively, this code for demo-mode release is incorrect and needs to be removed. Cc: Christoph Hellwig <hch@lst.de> Cc: Andy Grover <agrover@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
58d92618 |
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20-Mar-2012 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Remove obsolete DF_READ_ONLY usage This was used at one time as a hack by FILEIO backend registration to allow a struct block_device that was claimed with blkdev_get (by a local filesystem mount for example) to be exported as read-only (SCSI WP=1). Since FILEIO backend registration will no longer attempt to obtain exclusive access to an underlying struct block_device here, this flag is now obsolete. Reported-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
28168905 |
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15-Mar-2012 |
Jörn Engel <joern@logfs.org> |
target: remove obvious warnings Get rid of a bunch of write-only variables. In a number of cases I suspect actual bugs to be present, so I left all of those for a second look. (nab: fix lio-core patch fuzz) Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
f2083241 |
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15-Mar-2012 |
Jörn Engel <joern@logfs.org> |
target: Use array_zalloc for device_list Turns an order-8 allocation into slab-sized ones, thereby preventing allocation failures with memory fragmentation. This likely saves memory as well, as the slab allocator can pack objects more tightly than the buddy allocator. (nab: Fix lio-core patch fuzz) Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
4a5a75f3 |
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15-Mar-2012 |
Jörn Engel <joern@logfs.org> |
target: Use array_zalloc for tpg_lun_list Turns an order-10 allocation into slab-sized ones, thereby preventing allocation failures with memory fragmentation. This likely saves memory as well, as the slab allocator can pack objects more tightly than the buddy allocator. Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
337c0607 |
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10-Mar-2012 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Convert se_node_acl->acl_group removal to use ->acl_kref This patch converts core_tpg_del_initiator_node_acl() shutdown from configfs context to use se_node_acl->acl_kref and ->acl_free_comp in order to wait for outstanding fabric callbacks to complete via transport_deregister_session() callbacks before waking ->acl_free_comp from the last ->acl_kref put. It also changes core_tpg_del_initiator_node_acl() to setup a local sess_list with target_get_session() + acl->acl_stop = 1 for active sessions that will be shutdown, and changes transport_deregister_session_configfs() to check for ->acl_stop usage. Cc: Roland Dreier <roland@purestorage.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Joern Engel <joern@logfs.org> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
afb999ff |
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09-Mar-2012 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Add se_node_acl->acl_kref for ->acl_free_comp usage This patch adds se_node_acl->acl_kref for use with ->acl_free_comp during explict se_node_acl release. It adds kref_init() during se_node_acl setup, kref_get() during __transport_register_session() -> target_put_nacl() with existing transport_deregister_session() fabric callback usage. It also moves transport_free_session() to release *se_sess memory after target_put_nacl() execution in transport_deregister_session() Cc: Roland Dreier <roland@purestorage.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Joern Engel <joern@logfs.org> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
01468346 |
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10-Mar-2012 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Add se_node_acl->acl_free_comp for NodeACL release path Add se_node_acl->acl_free_comp for NodeACL release path to wait for outstanding fabric session shutdown to complete in transport_deregister_session() before finishing NodeACL release from configfs process context. Also make transport_deregister_session() clear the comp_nacl bit to skip se_node_acl->acl_free_comp completion for dynamically generated NodeACL during fabric session shutdown. Cc: Roland Dreier <roland@purestorage.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Joern Engel <joern@logfs.org> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
140854cb |
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31-Aug-2011 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Convert session_lock to irqsave This patch converts the remaining struct se_portal_group->session_lock usage to use irqsave+irqrestore to address the following warnings for hardware target mode interrupt context usage. This change generate other warnings for current iscsi-target mode still using ->session_lock with spin_lock_bh, which will need to be converted in a seperate patch. [ 492.480728] [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ] [ 492.488194] 3.0.0+ #23 [ 492.490820] ------------------------------------------------------ [ 492.497704] sh/7162 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire: [ 492.504493] (&(&se_tpg->session_lock)->rlock){+.....}, at: [<ffffffffa022364d>] transport_deregister_session+0x2d/0x163 [target_core_mod] 492.518390] [ 492.518390] and this task is already holding: [ 492.524897] (&(&ha->hardware_lock)->rlock){-.-...}, at: [<ffffffffa00b9146>] qla_tgt_stop_phase1+0x5e/0x27e [qla2xxx] [ 492.536856] which would create a new lock dependency: [ 492.542481] (&(&ha->hardware_lock)->rlock){-.-...} -> (&(&se_tpg->session_lock)->rlock){+.....} [ 492.552321] [ 492.552321] but this new dependency connects a HARDIRQ-irq-safe lock: [ 492.561149] (&(&ha->hardware_lock)->rlock){-.-...} [ 492.566400] ... which became HARDIRQ-irq-safe at: [ 492.571841] [<ffffffff81064720>] __lock_acquire+0x68f/0x921 [ 492.578247] [<ffffffff81064eff>] lock_acquire+0xe0/0x10d [ 492.584367] [<ffffffff813a74c6>] _raw_spin_lock_irqsave+0x44/0x56 [ 492.591358] [<ffffffffa009b1be>] qla24xx_msix_default+0x5c/0x2aa [qla2xxx] [ 492.599227] [<ffffffff81088582>] handle_irq_event_percpu+0x5a/0x197 [ 492.606413] [<ffffffff810886fb>] handle_irq_event+0x3c/0x5c [ 492.612822] [<ffffffff8108a6dc>] handle_edge_irq+0xcc/0xf1 [ 492.619138] [<ffffffff810039b9>] handle_irq+0x83/0x8e [ 492.624971] [<ffffffff8100333e>] do_IRQ+0x48/0xaf [ 492.630413] [<ffffffff813a7cd3>] ret_from_intr+0x0/0x1a [ 492.636437] [<ffffffff81001dc1>] cpu_idle+0x5b/0x8d [ 492.642073] [<ffffffff81392709>] rest_init+0xad/0xb4 [ 492.647809] [<ffffffff81a1cbbc>] start_kernel+0x366/0x371 [ 492.654030] [<ffffffff81a1c2b1>] x86_64_start_reservations+0xb8/0xbc [ 492.661311] [<ffffffff81a1c3b6>] x86_64_start_kernel+0x101/0x110 [ 492.668204] [ 492.668205] to a HARDIRQ-irq-unsafe lock: [ 492.674324] (&(&se_tpg->session_lock)->rlock){+.....} [ 492.679862] ... which became HARDIRQ-irq-unsafe at: [ 492.685497] ... [<ffffffff8106479a>] __lock_acquire+0x709/0x921 [ 492.692209] [<ffffffff81064eff>] lock_acquire+0xe0/0x10d [ 492.698330] [<ffffffff813a75ed>] _raw_spin_lock_bh+0x31/0x40 [ 492.704836] [<ffffffffa021c208>] core_tpg_del_initiator_node_acl+0x89/0x336 [target_core_mod] [ 492.714546] [<ffffffffa02fb075>] tcm_qla2xxx_drop_nodeacl+0x20/0x2d [tcm_qla2xxx] [ 492.723087] [<ffffffffa02108d9>] target_fabric_nacl_base_release+0x22/0x24 [target_core_mod] [ 492.732698] [<ffffffffa01661c8>] config_item_release+0x7d/0xa3 [configfs] [ 492.740465] [<ffffffff811d48fe>] kref_put+0x43/0x4d [ 492.746101] [<ffffffffa0166149>] config_item_put+0x19/0x1b [configfs] [ 492.753481] [<ffffffffa0164987>] configfs_rmdir+0x1eb/0x258 [configfs] [ 492.760957] [<ffffffff810ecc54>] vfs_rmdir+0x79/0xd0 [ 492.766690] [<ffffffff810eec4a>] do_rmdir+0xc2/0x111 [ 492.772423] [<ffffffff810eecd0>] sys_rmdir+0x11/0x13 [ 492.778156] [<ffffffff813ae4d2>] system_call_fastpath+0x16/0x1b [ 492.784953] Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
8d9efe53 |
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11-Jan-2012 |
Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
target: fix return code of core_tpg_.*_lun - core_tpg_pre_addlun() returns always ERR_PTR() or the pointer, never NULL. The additional check for NULL in core_dev_add_lun() is not required. - core_tpg_pre_dellun() returns always ERR_PTR() or the pointer, never NULL. The check for NULL in core_dev_del_lun() is wrong. The third argument (int *) is never used, remove it. - core_dev_add_lun() returns always NULL or the pointer, never ERR_PTR. The check for IS_ERR() is not required. (nab: Convert core_dev_add_lun() use err.h macros for failure handling to be consistent with the rest of target_core_fabric_configfs.c callers) Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
c4795fb2 |
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16-Nov-2011 |
Christoph Hellwig <hch@infradead.org> |
target: header reshuffle, part2 This reorganized the headers under include/target into: - target_core_base.h stays as is with all target-wide data stuctures and defines - target_core_backend.h contains the whole interface to I/O backends - target_core_fabric.h contains the whole interface to fabric modules Except for those only the various configfs macro headers stay around. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
e26d99ae |
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13-Nov-2011 |
Christoph Hellwig <hch@infradead.org> |
target: reshuffle headers Create a new headers, drivers/target/target_core_internal.h that is supposed to hold all target_core-internal prototypes. Move all non-exported includes from include/target to it, and merge the smaller prototype-only includes inside drivers/target into it as well. Mark functions that were found to not be called outside their implementation file static. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
c53181af |
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30-Aug-2011 |
Paul Gortmaker <paul.gortmaker@windriver.com> |
drivers/target: Add export.h to files as required. So that they have access to EXPORT_SYMBOL variants and THIS_MODULE. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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#
bfb9035c |
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17-Aug-2011 |
Joe Perches <joe@perches.com> |
treewide: Correct spelling of successfully in comments Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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#
28638887 |
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16-Aug-2011 |
Roland Dreier <roland@purestorage.com> |
target: Convert acl_node_lock to be IRQ-disabling With qla2xxx, acl_node_lock is taken inside qla2xxx's hardware_lock, which is taken in hardirq context. This means acl_node_lock must become an IRQ-disabling lock; in particular this fixes lockdep warnings along the lines of ====================================================== [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ] (&(&se_tpg->acl_node_lock)->rlock){+.....}, at: [<ffffffffa026f872>] transport_deregister_session+0x92/0x140 [target_core_mod] and this task is already holding: (&(&ha->hardware_lock)->rlock){-.-...}, at: [<ffffffffa017c5e7>] qla_tgt_stop_phase1+0x57/0x2c0 [qla2xxx] which would create a new lock dependency: (&(&ha->hardware_lock)->rlock){-.-...} -> (&(&se_tpg->acl_node_lock)->rlock){+.....} but this new dependency connects a HARDIRQ-irq-safe lock: (&(&ha->hardware_lock)->rlock){-.-...} to a HARDIRQ-irq-unsafe lock: (&(&se_tpg->acl_node_lock)->rlock){+.....} Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
052605c6 |
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26-Jul-2011 |
Nicholas Bellinger <nab@linux-iscsi.org> |
target: Make standard INQUIRY return 'not connected' for tpg_virt_lun0 This patch changes target_emulate_inquiry_std() to set the 'not connected' (0x35) bit in standard INQUIRY response data when we are processing a request to a virtual LUN=0 mapping from struct se_device *g_lun0_dev that have been setup for us in transport_lookup_cmd_lun(). This addresses an issue where qla2xxx FC clients need to be able to create demo-mode I_T FC Nexuses by default, but should not be exposing the default set of TPG LUNs to all FC clients. This includes adding an new optional target_core_fabric_ops->tpg_check_demo_mode_login_only() caller to allow demo_mode nexuses to skip the old default of bulding a demo-mode MappedLUNs list via core_tpg_add_node_to_devs(). (roland: Add missing tpg_check_demo_mode_login_only check in core_dev_add_lun) Reported-by: Roland Dreier <roland@purestorage.com> Cc: Andrew Vasquez <andrew.vasquez@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
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#
6708bb27 |
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08-Jun-2011 |
Andy Grover <agrover@redhat.com> |
target: Follow up core updates from AGrover and HCH (round 4) This patch contains the squashed version of forth round series cleanups from Andy and Christoph following the post heavy lifting in the preceeding: 'Eliminate usage of struct se_mem' and 'Make all control CDBs scatter-gather' changes. This also includes a conversion of target core and the v3.0 mainline fabric modules (loopback and tcm_fc) to use pr_debug and the CONFIG_DYNAMIC_DEBUG infrastructure! These have been squashed into this third and final round for v3.1. target: Remove ifdeffed code in t_g_process_write target: Remove direct ramdisk code target: Rename task_sg_num to task_sg_nents target: Remove custom debug macros for pr_debug. Use pr_err(). target: Remove custom debug macros in mainline fabrics target: Set WSNZ=1 in block limits VPD. Abort if WRITE_SAME sectors = 0 target: Remove transport do_se_mem_map callback target: Further simplify transport_free_pages target: Redo task allocation return value handling target: Remove extra parentheses target: change alloc_task call to take *cdb, not *cmd (nab: Fix bogus struct file assignments in fd_do_readv and fd_do_writev) Signed-off-by: Andy Grover <agrover@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
e3d6f909 |
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19-Jul-2011 |
Andy Grover <agrover@redhat.com> |
target: Core cleanups from AGrover (round 1) This patch contains the squashed version of a number of cleanups and minor fixes from Andy's initial series (round 1) for target core this past spring. The condensed log looks like: target: use errno values instead of returning -1 for everything target: Rename transport_calc_sg_num to transport_init_task_sg target: Fix leak in error path in transport_init_task_sg target/pscsi: Remove pscsi_get_sh() usage target: Make two runtime checks into WARN_ONs target: Remove hba queue depth and convert to spin_lock_irq usage target: dev->dev_status_queue_obj is unused target: Make struct se_queue_req.cmd type struct se_cmd * target: Remove __transport_get_qr_from_queue() target: Rename se_dev->g_se_dev_list to se_dev_node target: Remove struct se_global target: Simplify scsi mib index table code target: Make dev_queue_obj a member of se_device instead of a pointer target: remove extraneous returns at end of void functions target: Ensure transport_dump_vpd_ident_type returns null-terminated str target: Function pointers don't need to use '&' to be assigned target: Fix comment in __transport_execute_tasks() target: Misc style cleanups target: rename struct pr_reservation_template to pr_reservation target: Remove #defines that just perform indirection target: Inline transport_get_task_from_execute_queue() target: Minor header comment fixes Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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#
5edc3413 |
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25-Jan-2011 |
Arnd Bergmann <arnd@arndb.de> |
drivers: remove extraneous includes of smp_lock.h These were missed the last time I cleaned this up globally, because of code moving around or new code getting merged. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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#
e89d15ee |
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09-Feb-2011 |
Nicholas Bellinger <nab@linux-iscsi.org> |
[SCSI] target: Remove procfs based target_core_mib.c code This patch removes the legacy procfs based target_core_mib.c code, and moves the necessary scsi_index_tables functions and defines into target_core_transport.c and target_core_base.h code to allow existing fabric independent statistics to function. This includes the removal of a handful of 'atomic_t mib_ref_count' counters used in struct se_node_acl, se_session and se_hba to prevent removal while using seq_list procfs walking logic. [jejb: fix up compile failures] Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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#
c66ac9db |
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17-Dec-2010 |
Nicholas Bellinger <nab@linux-iscsi.org> |
[SCSI] target: Add LIO target core v4.0.0-rc6 LIO target is a full featured in-kernel target framework with the following feature set: High-performance, non-blocking, multithreaded architecture with SIMD support. Advanced SCSI feature set: * Persistent Reservations (PRs) * Asymmetric Logical Unit Assignment (ALUA) * Protocol and intra-nexus multiplexing, load-balancing and failover (MC/S) * Full Error Recovery (ERL=0,1,2) * Active/active task migration and session continuation (ERL=2) * Thin LUN provisioning (UNMAP and WRITE_SAMExx) Multiprotocol target plugins Storage media independence: * Virtualization of all storage media; transparent mapping of IO to LUNs * No hard limits on number of LUNs per Target; maximum LUN size ~750 TB * Backstores: SATA, SAS, SCSI, BluRay, DVD, FLASH, USB, ramdisk, etc. Standards compliance: * Full compliance with IETF (RFC 3720) * Full implementation of SPC-4 PRs and ALUA Significant code cleanups done by Christoph Hellwig. [jejb: fix up for new block bdev exclusive interface. Minor fixes from Randy Dunlap and Dan Carpenter.] Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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