- 24 Oct, 2011 40 commits
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Christoph Hellwig authored
Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Nicholas Bellinger <nab@linux-iscsi.org>
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Christoph Hellwig authored
list_for_each_entry_safe only protects against deletions from the list, but not against any concurrent modifications. Given that we drop t_state_lock inside the loop it is not safe in transport_free_dev_tasks. Instead of use a local dispose_list that we move all tasks that are to be deleted to. This is safe because we never do list_emptry checks on t_list to check if a command is on the list anywhere. Signed-off-by:
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Christoph Hellwig authored
Change one remaining user of transport_cmd_check_stop(cmd, 2, 0) to the transport_cmd_check_stop_to_fabric wrapper. Signed-off-by:
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Christoph Hellwig authored
We always operated on the same queue, so move finding it into the function, just like we do for all other helpers operating on it. Signed-off-by:
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Christoph Hellwig authored
Add a new boolean at_head parameter to transport_add_cmd_to_queue and thus obsolete the SCF_EMULATE_QUEUE_FULL flag. Signed-off-by:
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Christoph Hellwig authored
Remove the need for the transport_qf_callback callback by making sure we have specific states with specific handlers for the two queue full cases. Signed-off-by:
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Christoph Hellwig authored
Remove the dpo_emulated, fua_write_emulated, fua_read_emulated and write_cache_emulated methods, and replace them with a simple bitfields in se_subsystem_api in those cases where they ever returned one. Signed-off-by:
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Christoph Hellwig authored
Do not block the submitting thread when handling a SYNCHRONIZE CACHE command, but implement it asynchronously by sending the FLUSH command ourself and calling transport_complete_sync_cache from the completion handler. Signed-off-by:
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Nicholas Bellinger authored
This patch fixes a bug with the handling of REPORT TARGET PORT GROUPS containing a smaller allocation length than the payload requires causing memory writes beyond the end of the buffer. This patch checks for the minimum 4 byte length for the response payload length, and also checks upon each loop of T10_ALUA(su_dev)->tg_pt_gps_list to ensure the Target port group and Target port descriptor list is able to fit into the remaining allocation length. If the response payload exceeds the allocation length length, then rd_len is still increments to indicate to the initiator that the payload has been truncated. Reported-by:
Roland Dreier <roland@purestorage.com> Cc: stable@kernel.org Signed-off-by:
Nicholas Bellinger <nab@risingtidesystems.com>
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Christoph Hellwig authored
Add a switch statement implementing the CDB LBA/len update directly in target_get_task_cdb and remove the old ->transport_split_cdb callback and all its implementations. Signed-off-by:
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Christoph Hellwig authored
Instead of calling out to the backends from the core to get a per-task CDB and then modify it for the LBA/len pair used for this CDB provide a helper that writes the adjusted CDB into a provided buffer and call this method from ->do_task in pscsi. Signed-off-by:
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Christoph Hellwig authored
The most commonly used file, iblock and rd backends have no use for a per-task CDB and thus don't need a method to copy it into their otherwise unused CDB fields. Signed-off-by:
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Christoph Hellwig authored
Rearrange the fields in se_task to avoid holes. Also increase the flags field to 16 bits as we have the space for it, and this makes adding new flags safer. Signed-off-by:
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Christoph Hellwig authored
This is a squashed version of the following unnecessary se_task structure member removal patches: target: remove the task_execute_queue field in se_task Instead of using a separate flag we can simply do list_emptry checks on t_execute_list if we make sure to always use list_del_init to remove a task from the list. Also factor some duplicate code into a new __transport_remove_task_from_execute_queue helper. target: remove the read-only task_no field in se_task The task_no field never was initialized and only used in debug printks, so kill it. target: remove the task_padded_sg field in se_task This field is only check in one place and not actually needed there. Rationale: - transport_do_task_sg_chain asserts that we have task_sg_chaining set early on - we only make use of the sg_prev_nents field we calculate based on it if there is another sg list that gets chained onto this one, which never happens for the last (or only) task. Signed-off-by: -
Christoph Hellwig authored
Replace various atomic_t variables that were mostly under t_state_lock with new flags in task_flags. Note that the execution error path didn't take t_state_lock before, so add it there. Signed-off-by:
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Christoph Hellwig authored
This is a squashed version of the following se_task cleanup patches: target: remove the unused task_state_flags field in se_task target: remove the unused se_obj_ptr field in se_task target: remove the se_dev field in se_task Signed-off-by: -
Christoph Hellwig authored
This is a squashed version of the following target_core_base.h cleanup patches: target: remove the unused SHUTDOWN_SIGS defintion target: remove unused se_mem leftovers target: remove the unused map_func_t typedef target: move TRANSPORT_IOV_DATA_BUFFER to the iscsi-specific code Signed-off-by: -
Nicholas Bellinger authored
This patch fixes a bug with tcm_loop where performing a scsi_host rescan was causing an oops due to a received scsi_cmnd->device->id value not matching a previously configured tcm_loop_tpg entry in tcm_loop_hba->tl_hba_tpgs[] obtained from within tcm_loop_queuecommand() code. This fix adds an explict check for tcm_loop_tpg->tl_hba in order to ensure tcm_loop_make_naa_tpg() has already been invoked to initialize a given tcm_loop_tpg entry, and also adds an explict clear of tcm_loop_tpg->tl_hba from within the tcm_loop_drop_naa_tpg() release path. This bug was manifesting itself with the following OOPs: [176289.430909] BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 [176289.431337] IP: [<ffffffffa0395617>] transport_processing_thread+0x1e3/0x794 [target_core_mod] [176289.431399] PGD 22e9b067 PUD 23375067 PMD 0 [176289.431399] Oops: 0000 [#1] SMP [176289.431815] CPU 1 [176289.431815] Modules linked in: tcm_loop target_core_stgt target_core_pscsi target_core_file target_core_iblock target_core_mod crc32c ib_cm ib_sa ib_mad ib_core qla2xxx scsi_tgt configfs fcoe libfcoe libfc scsi_transport_fc ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi sr_mod cdrom sd_mod ata_piix libata e1000 mptspi mptscsih mptbase [last unloaded: target_core_mod] [176289.431815] [176289.431815] Pid: 12339, comm: LIO_iblock Tainted: G W 3.1.0-rc8+ [176289.431815] RIP: 0010:[<ffffffffa0395617>] [<ffffffffa0395617>] transport_processing_thread+0x1e3/0x794 [target_core_mod] [176289.431815] RSP: 0018:ffff880023bfbe10 EFLAGS: 00010283 [176289.431815] RAX: 0000000000000000 RBX: ffff88002d600040 RCX: ffff88002d600108 [176289.431815] RDX: ffff88000c9e50bc RSI: 0000000000000246 RDI: 0000000000000246 [176289.431815] RBP: ffff880023bfbee0 R08: ffff88002d600108 R09: 0000000000000000 [176289.431815] R10: ffff88002fc8cc80 R11: ffffffff81671b60 R12: ffff88002d600108 [176289.431815] R13: ffff88000c9e4f38 R14: ffff88000c9e50b8 R15: 0000000000000000 [176289.431815] FS: 0000000000000000(0000) GS:ffff88002fc80000(0000) knlGS:0000000000000000 [176289.431815] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [176289.431815] CR2: 0000000000000090 CR3: 000000002a33f000 CR4: 00000000000006e0 [176289.431815] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [176289.431815] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [176289.431815] Process LIO_iblock (pid: 12339, threadinfo ffff880023bfa000, task ffff88002a2e0000) [176289.431815] Stack: [176289.431815] 0000000000011280 0000000000000246 ffff88002a2e0000 ffff880023a58900 [176289.431815] ffff880023bfbed0 ffff880023bfa000 ffff880023bfa000 ffff88000c9e50d0 [176289.431815] ffff88000c9e50c0 ffff88000c9e50bc ffff880023bfa000 ffff880023bfbfd8 [176289.431815] Call Trace: [176289.431815] [<ffffffff81056657>] ? wake_up_bit+0x25/0x25 [176289.431815] [<ffffffffa0395434>] ? transport_handle_cdb_direct+0x92/0x92 [target_core_mod] [176289.431815] [<ffffffff8105619a>] kthread+0x7d/0x85 [176289.431815] [<ffffffff813cbcb4>] kernel_thread_helper+0x4/0x10 [176289.431815] [<ffffffff8105611d>] ? kthread_worker_fn+0x16d/0x16d [176289.431815] [<ffffffff813cbcb0>] ? gs_change+0x13/0x13 [176289.431815] Code: 67 05 00 00 41 8b 84 24 4c ff ff ff ff c8 83 f8 11 0f 87 f0 04 00 00 89 c0 ff 24 c5 b0 c6 39 a0 0f 0b eb fe 48 8b 83 d8 00 00 00 [176289.431815] RIP [<ffffffffa0395617>] transport_processing_thread+0x1e3/0x794 [target_core_mod] [176289.431815] RSP <ffff880023bfbe10> [176289.431815] CR2: 0000000000000090 [176295.041004] ---[ end trace 85dc6865b23b8f3e ]--- Reported-by:
Paolo Bonzini <pbonzini@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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Nicholas Bellinger authored
This patch removes the legacy device active I/O shutdown code that was originally called from transport_processing_thread() context during shutdown including transport_processing_shutdown() and transport_release_all_cmds(). This is due to the fact that in modern configfs control plane code by the time shutdown of an se_device instance in transport_processing_thread() is allowed to occur via: rmdir /sys/kernel/config/target/core/$HBA/$DEV all active I/O will already have been ceased while removing active configfs fabric Port/LUN symlinks. Eg: the removal of an active se_device is protected by inter-module VFS references from active Port/LUN symlinks. Two WARN_ON() checks have been added in their place before exiting transport_processing_thread() to watch out for any leaked descriptors. Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: -
Nicholas Bellinger authored
This patch merges transport_cmd_finish_abort_tmr() logic into a single transport_cmd_finish_abort() function by adding a cmd->se_tmr_req check around transport_lun_remove_cmd(), and updates the single caller within core_tmr_drain_tmr_list(). Reported-by:
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Nicholas Bellinger authored
This patch removes a number of SCF_SE_LUN_CMD flag abuses within iscsi-target code to determine when iscsit_release_cmd() or transport_generic_free_cmd() should be called while releasing an individual iscsi_cmd descriptor. In the place of SCF_SE_LUN_CMD checks, this patch converts existing code to use a new iscsit_free_cmd() that inspects iscsi_cmd->iscsi_opcode types to determine which of the above functions should be invoked. It also removes the now unnecessary special case checking in iscsit_release_commands_from_conn(). (hch: Use iscsit_free_cmd instead of open-coded alternative) Reported-by:
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Nicholas Bellinger authored
This patch converts se_cmd->transport_wait_for_tasks(se_cmd, 1) usage to use transport_generic_free_cmd() directly in target-core and iscsi-target fabric usage. The includes: *) Removal of the optional transport_generic_free_cmd() call from within transport_generic_wait_for_tasks() *) Usage of existing SCF_SUPPORTED_SAM_OPCODE to determine when transport_generic_wait_for_tasks() processing may occur instead of checking se_cmd->transport_wait_for_tasks() *) Move transport_generic_wait_for_tasks() call ahead of core_dec_lacl_count() and transport_lun_remove_cmd() in transport_generic_free_cmd() to follow existing logic for iscsi-target w/ se_cmd->transport_wait_for_tasks(se_cmd, 1) *) Removal of se_cmd->transport_wait_for_tasks() function pointer *) Rename transport_generic_wait_for_tasks() -> transport_wait_for_tasks(), and add docbook comment. *) Add EXPORT_SYMBOL for transport_wait_for_tasks() For the case in iscsi_target_erl2.c:iscsit_prepare_cmds_for_realligance() where se_cmd->transport_wait_for_tasks(se_cmd, 0) is called, this patch adds a direct call to transport_wait_for_tasks(). (hch: Fix transport_generic_free_cmd() usage in iscsit_release_commands_from_conn) (nab: Add patch: Ensure that TMRs hit wait_for_tasks logic during release) Reported-by:
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Roland Dreier authored
Testing in_interrupt() to know when sleeping is allowed is not really reliable (since eg it won't be true if the caller is holding a spinlock). Instead have the caller tell core_tmr_alloc_req() what GFP_xxx to use; every caller except tcm_qla2xxx can use GFP_KERNEL. Signed-off-by:
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Dan Carpenter authored
This patch changes pscsi_create_virtdevice() to properly return ERR_CAST instead of a raw pointer upon scsi_host_lookup() failure. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Andy Shevchenko authored
This patch converts ft_parse_wwn() to use hex_to_bin() instead of custom conversion code. (Andy: Re-add missing strict && isupper(c) check) Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org> Signed-off-by:
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Andy Shevchenko authored
This patch converts chap_string_to_hex() to use hex2bin() instead of the internal chap_asciihex_to_binaryhex(). (nab: Fix up minor compile breakage + typo) Signed-off-by:
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Christoph Hellwig authored
The cdb_none, map_data_SG and map_control_SG methods have no callers left and can be removed now. Signed-off-by:
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Christoph Hellwig authored
Move the entirely request allocation, mapping and submission into ->do_task. This a) avoids blocking the I/O submission thread unessecarily, and b) simplifies the code greatly Note that the code seems to have various error handling issues, mostly related to bidi handling in the current form. I've added comments about those but not tried to fix them in this commit. Signed-off-by:
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Christoph Hellwig authored
Move the entirely bio allocation, mapping and submission into ->do_task. This a) avoids blocking the I/O submission thread unessecarily, and b) simplifies the code greatly Signed-off-by:
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Andy Shevchenko authored
This patch adds a minor simplfication in target_parse_naa_6h_vendor_specific() to remove direct isxdigit() + ctype.h usage. (nab: Fix next assignment breakage in for loop) Signed-off-by:
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Nicholas Bellinger authored
This patch removes the unnecessary session_reinstatement parameter from se_cmd->transport_wait_for_tasks(), logic in transport_generic_wait_for_tasks, and usage within iscsi-target code. This also includes the removal of the 'bool' return from transport_put_cmd() + transport_generic_free_cmd() that is no longer necessary. Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: -
Christoph Hellwig authored
Push session reinstatement out of transport_generic_free_cmd into the only caller that actually needs it. Clean up transport_generic_free_cmd a bit, and remove the useless comment. I'd love to add a more useful kerneldoc comment for it, but as this point I'm still a bit confused in where it stands in the command release stack. Signed-off-by:
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Christoph Hellwig authored
All callers that never have the session_reinstatement flag set can trivially be converted to transport_put_cmd. Opencode the session reinstatement code in transport_generic_free_cmd, which was the only caller ever asking for it. Signed-off-by:
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Christoph Hellwig authored
Inline two simple functions only used by it, and replace a goto with a simple if else construct. Note that the code moved from transport_dec_and_check seems fairly buggy - the atomic_read check on a variable where we'd do an atomic_dec_and_test looks racy if we'll ever get someone increment it without the lock held around them (which it looks like we do), and not decrementing the second counter if the first one doesn't hit zero also at least needs an explanation. (nab: Fix transport_put_cmd breakage) Signed-off-by:
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Christoph Hellwig authored
Instead of duplicating the code from transport_release_fe_cmd re-use it by allowing transport_release_fe_cmd to return wether it actually freed the command or not. Also rename transport_release_fe_cmd to transport_put_cmd and add a kerneldoc comment for it to make the use case more obvious. Signed-off-by:
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Christoph Hellwig authored
It is only called by transport_release_cmd, so inline it there. Also add a kerneldoc comment for transport_release_cmd while we are at it. Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
iscsit_task_reassign_complete is always called from the TX thread, so handle the CDB directly instead of offloading it. Signed-off-by:
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Christoph Hellwig authored
ft_send_work is always called from workqueue context, which means we can handle the CDB directly instead of doing another context switch. Signed-off-by:
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