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254 Commits

Author SHA1 Message Date
Bart Van Assche
380d63a33e Updated performance measurements. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1858 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-22 08:32:50 +00:00
Bart Van Assche
34bab4bc58 Micro-optimized the IB completion handlers for modes thread=0 and thread=2. 
Fixed another session unregistration race.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1857 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-22 07:43:17 +00:00
Bart Van Assche
a8d02fbfca Enabled rdy_to_xfer_atomic for mode thread=0. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1855 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-22 05:54:55 +00:00
Bart Van Assche
b5c0a25514 Module removal and session unregistration with ongoing I/O should now finally work reliably. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1849 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-21 14:22:34 +00:00
Bart Van Assche
5ded0b7660 Changes: 
- Implemented a workaround for a race between ib_destroy_cq() and the IB
  completion handlers. This race could trigger a kernel crash or kernel lockup
  when unloading the ib_srpt module while I/O was ongoing or by performing
  a relogin from an SRP initiator while I/O was ongoing.
- Moved the code for handling IB completions in single-threaded mode to
  separate functions.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1848 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-21 10:52:36 +00:00
Bart Van Assche
0e6414624e Follow-up for r1845. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1846 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-20 19:44:39 +00:00
Bart Van Assche
a9668c9f07 Micro-optimized srpt_handle_rdma_comp(). 
Assigned names to the three threading modes.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1845 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-20 18:40:29 +00:00
Bart Van Assche
7cca01ae41 Added one more test. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1842 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-18 17:43:44 +00:00
Bart Van Assche
2d3b5d3387 Partially reverted r1416 in order to fix a data corruption issue that occurred 
with highly parallel workloads.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1841 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-18 17:39:43 +00:00
Bart Van Assche
5d78905aaf Whitespace-only changes: converted spaces to tabs. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1840 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-17 20:17:45 +00:00
Bart Van Assche
3b69f969f1 Under heavily multithreaded I/O (twenty or more concurrent writers), data corruption could occur. This issue was introduced in r1506 and has now been fixed. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1839 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-17 19:50:45 +00:00
Bart Van Assche
78cb9e9458 Changed meaning of thread kernel module parameter: while 0 still stands for IRQ context, 1 does now stand for single-threaded processing and 2 for processing SCSI command via multiple kernel threads. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1838 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-17 19:21:22 +00:00
Bart Van Assche
402306e3e0 Relaxed send-queue-full error handling. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1826 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-14 18:37:42 +00:00
Bart Van Assche
7a0a6fb86e Made srpt_srq_size configurable as a kernel module parameter. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1825 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-14 18:28:09 +00:00
Bart Van Assche
fe81f9766c Changed two PRINT_INFO() messages that reported that the send queue was full into PRINT_ERROR() messages, and renamed a few variables. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1824 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-14 17:22:52 +00:00
Bart Van Assche
e7c082ac23 Implemented several source code refinements that do not affect functionality. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1819 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-13 18:36:08 +00:00
Bart Van Assche
47a5c6072c Fixed a bug in the command abortion code. E.g. the following kernel message could be generated when unloading ib_srpt while I/O was ongoing: 
------------[ cut here ]------------
WARNING: at /home/bart/software/scst/srpt/src/ib_srpt.c:1063 srpt_reset_ioctx+0x15b/0x170 [ib_srpt]()
Hardware name: P5Q DELUXE
Modules linked in: [ ... ]
Pid: 20709, comm: disk011_4 Tainted: G        W  2.6.34-scst #1
Call Trace:
 [<ffffffff81048dbb>] warn_slowpath_common+0x7b/0xc0
 [<ffffffff81048e14>] warn_slowpath_null+0x14/0x20
 [<ffffffffa050772b>] srpt_reset_ioctx+0x15b/0x170 [ib_srpt]
 [<ffffffff81048dcf>] ? warn_slowpath_common+0x8f/0xc0
 [<ffffffffa0507773>] srpt_on_free_cmd+0x33/0x60 [ib_srpt]
 [<ffffffffa0480a0b>] scst_free_cmd+0xab/0x460 [scst]
 [<ffffffffa046dd38>] scst_finish_cmd+0x178/0x300 [scst]
 [<ffffffffa0470ed4>] scst_process_active_cmd+0x134/0x640 [scst]
 [<ffffffffa0471dac>] scst_process_redirect_cmd+0x2bc/0x3f0 [scst]
 [<ffffffffa047247a>] scst_tgt_cmd_done+0x6a/0x100 [scst]
 [<ffffffffa0508dec>] srpt_xmit_response+0x11c/0x210 [ib_srpt]
 [<ffffffffa046b53c>] scst_xmit_response+0x13c/0x560 [scst]
 [<ffffffffa0470efb>] scst_process_active_cmd+0x15b/0x640 [scst]
 [<ffffffffa047149d>] scst_do_job_active+0xbd/0x180 [scst]
 [<ffffffffa0471806>] scst_cmd_thread+0x1c6/0x4b0 [scst]
 [<ffffffff8103e960>] ? default_wake_function+0x0/0x20
 [<ffffffffa0471640>] ? scst_cmd_thread+0x0/0x4b0 [scst]
 [<ffffffff810683e6>] kthread+0x96/0xa0
 [<ffffffff81003d94>] kernel_thread_helper+0x4/0x10
 [<ffffffff8103dcb1>] ? finish_task_switch+0x51/0xb0
 [<ffffffff81344dac>] ? _raw_spin_unlock_irq+0x1c/0x40
 [<ffffffff813458ad>] ? restore_args+0x0/0x30
 [<ffffffff81068350>] ? kthread+0x0/0xa0
 [<ffffffff81003d90>] ? kernel_thread_helper+0x0/0x10
---[ end trace 84b1e00ea2ac6651 ]---


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1812 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-10 18:27:59 +00:00
Bart Van Assche
008841b622 Minor optimization: merged a srpt_get_cmd_state() and srpt_set_cmd_state() call. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1811 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-10 07:17:30 +00:00
Bart Van Assche
66ccc6d619 Reverted r1806 and fixed a race condition that could cause data corruption. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1808 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-09 18:12:24 +00:00
Bart Van Assche
45bbbbba5f Improved I/O stress test. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1807 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-09 18:04:23 +00:00
Bart Van Assche
cdd65273e9 Applied a temporary fix for data corruption that could occur when multiple initiators were accessing data on a multicore target system. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1806 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-08 18:29:52 +00:00
Bart Van Assche
2e07133917 Converted a WARN_ON() statement into PRINT_INFO(). 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1802 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-04 20:11:47 +00:00
Bart Van Assche
936f080310 Fixed a race condition that could cause SRP commands to be processed out of 
order on a multicore system. Also, split send and receive completion queues
such that the amount of code that is executed under spinlock and with IRQs
disabled is minimal.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1801 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-07-04 19:44:33 +00:00
Bart Van Assche
4438a65592 Fixed grammar in a source code comment. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1800 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-30 18:54:29 +00:00
Bart Van Assche
3375930bad Cleanup. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1797 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-28 19:03:40 +00:00
Bart Van Assche
58e0bbd491 Whitespace-only changes for checkpatch. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1796 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-28 18:35:38 +00:00
Bart Van Assche
2e0703275d SRPT with thread=0 works again (was broken by r1714, the merge of the persistent reservation branch to the trunk). 
Added more consistency checks.

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1795 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-28 18:23:28 +00:00
Bart Van Assche
c7369b432b Micro-optimized srpt_completion(). 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1792 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-26 10:42:06 +00:00
Bart Van Assche
e730fac09d Fixed sparse warnings. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1779 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-18 19:29:19 +00:00
Bart Van Assche
d3a2a54d48 Made sure endianness of ch->max_ti_iu_len is correct. The previous 
implementation could result in e.g. the following message in /var/log/messages:

       ib_srpt: Received SRP_LOGIN_REQ with i_port_id 0x200b000453000581:0x4538330005811, t_port_id 0x66a00980074b8:0x66a00980074b8 and it_iu_len 996 on port 1 (guid=0xfe80000000000000:0x66a00a00074b8)
       ...
       ib_srpt: ***WARNING***: truncated sense data from 18 to -469565476 bytes

This patch was submitted by Chas Williams.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1777 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-17 16:33:37 +00:00
Bart Van Assche
165bcc0f64 Use tabs instead of spaces for indentation. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1748 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-06 07:09:39 +00:00
Bart Van Assche
7268591baf Added support for persistent reservations. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1747 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-06-05 18:29:57 +00:00
Bart Van Assche
dd303b6198 Added to repository. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1724 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-05-30 07:50:09 +00:00
Bart Van Assche
fdbc99557e Fixed build breakage caused by r1714. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1715 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-05-26 18:16:26 +00:00
Vladislav Bolkhovitin
b53e4cb4c1 Merge of the pr branch with additional fixes for problems found during extra testing 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1714 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-05-26 17:46:46 +00:00
Bart Van Assche
ca2c97f7ba Fixed checkpatch warnings about long lines. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1708 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-05-22 08:25:25 +00:00
Bart Van Assche
c5a981ff61 Refined a comment. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1675 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-05-02 10:09:50 +00:00
Bart Van Assche
b19930753a Added sysfs support. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1674 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-05-02 08:15:29 +00:00
Bart Van Assche
87fb70f624 OFED version number update. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1664 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-04-29 06:35:35 +00:00
Bart Van Assche
bb20653c37 Updated OFED version numbers. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1653 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-04-24 14:25:31 +00:00
Bart Van Assche
38575b3d34 RHEL 5 / CentOS 5 bug fix: the argument of flush_workqueue() is a workqueue 
pointer, not a struct work pointer.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1581 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-04-04 11:55:37 +00:00
Bart Van Assche
4aadb84528 Added timeout handling for IB completions, in case it would ever happen 
that a HCA does not send an IB completion for an RDMA operation or IB send.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1579 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-04-02 16:38:15 +00:00
Bart Van Assche
2e6b0aef42 Changes: 
- Fixed a rare lockup triggered by module removal while I/O was ongoing.
- Made sure that IB cable removal works fine.
- Exported srpt_service_guid via sysfs.
- Made sure that ib_srpt.c compiles fine with #undef CONFIG_SCST_PROC.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1575 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-03-31 18:04:23 +00:00
Bart Van Assche
f2b01c8595 Converted function, enum and struct documentation to kernel-doc style. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1569 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-03-27 10:40:13 +00:00
Vladislav Bolkhovitin
cbaab260f1 Add new scst_cmd_get_queue_type()/scst_cmd_set_queue_type() accessors and use them in target drivers instead of direct access to SCST's cmd->queue_type. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1553 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-03-17 19:11:18 +00:00
Bart Van Assche
b05d967c8a Clarified a source code comment. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1543 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-03-15 19:25:29 +00:00
Bart Van Assche
e56b672502 Updated error messages -- req_lim < 0 is not an internal error but can be caused by a buggy initiator. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1532 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-03-03 19:36:05 +00:00
Bart Van Assche
a32e120e21 Added missing space in an error message. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1531 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-03-03 19:29:37 +00:00
Bart Van Assche
2d4d49f304 Fixed two WARN_ON() statements. 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1512 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-02-19 12:03:48 +00:00
Bart Van Assche
c519012fb2 Factored out channel unregistration code into a new function srpt_unregister_channel(). 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1508 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2010-02-14 12:51:14 +00:00