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9da49a2f8fcd251d6b728356265bdfd6a2d50a8c
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186 Commits
Author SHA1 Message Date
Vladislav Bolkhovitin e565cbce6e Merged revisions 5955,5959-5961,5965 via svnmerge from 
svn+ssh://vlnb@svn.code.sf.net/p/scst/svn/trunk

........
  r5955 | bvassche | 2014-12-22 05:10:41 -0800 (Mon, 22 Dec 2014) | 1 line
  
  Update for kernel 3.18
........
  r5959 | bvassche | 2015-01-06 05:25:28 -0800 (Tue, 06 Jan 2015) | 1 line
  
  scst_calc_block_shift: Log block shift and sector size upon mismatch
........
  r5960 | bvassche | 2015-01-07 01:20:06 -0800 (Wed, 07 Jan 2015) | 4 lines
  
  scst_local: Fix unique per session sas address
  
  Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
........
  r5961 | bvassche | 2015-01-09 04:23:25 -0800 (Fri, 09 Jan 2015) | 4 lines
  
  scst_sysfs: return EINVAL on too big LUN
  
  Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
........
  r5965 | bvassche | 2015-01-13 00:55:46 -0800 (Tue, 13 Jan 2015) | 68 lines
  
  qla2x00t: Copy entire SCST sense buffer to q2x ctio
  
  There seems to be a bug in passing sense information to QLA HBAs, where 
  the last 2 bytes of the sense data (ASC, ASCQ) are not copied to the low 
  level sense buffer.
  We encountered this in ESX, which relies on these 2 bytes to parse the 
  MISCOMPARE sense code (0xE1, 0x1D, 0x00).
  Bellow is a simple test to recreate this issue, but during vMotion 
  operations (where VMs are moved from one host to another), this may 
  cause the operation to fail leaving the VM in an inconsistent state.
  
  The test I ran to verify that we are indeed missing the bytes is the 
  following:
  1. Create a SCST based device
  2. Expose the device to 2 ESX hosts
  3. Format the device as VMFS5, create a test directory
  4. From both hosts, I start writing to this directory (no VMs involved, 
  just write normal files)
  
  At this stage, both ESX hosts try to take access to the directory.
  The VMFS filesystem contains a per-directory lock which is managed by 
  COMPARE AND WRITE command.
  Each ESX will attempt to change the VMFS lock location from unlocked to 
  locked to create the new file.
  
  Obviously there are bound to be failures (which are equivalent to 
  programming locking conflicts), these are reported by the MISCOMPARE 
  sense code.
  Upon these MISCOMPARE errors, the host will re-try taking the lock until 
  it succeeds, and will then proceed to perform the write operation on the 
  directory.
  
  Due to the bug in copying the sense buffer from the SCST core to the QLA 
  ctio, instead of the full sense code, only the key (0xE) is sent, and 
  ESX does not know how to handle it resulting in IO error.
  
  Here are the errors as they appear on the command line:
  /vmfs/volumes/54a297c4-ca5af1cc-7f94-002219d20f28/ats_test # 
  ./open_close_test-esx2.sh
  ./open_close_test-esx2.sh: line 8: can't create 
  ats_fileoptest-esx2_1.txt: Input/output error
  ./open_close_test-esx2.sh: line 8: can't create 
  ats_fileoptest-esx2_21.txt: Input/output error
  ./open_close_test-esx2.sh: line 8: can't create 
  ats_fileoptest-esx2_110.txt: Input/output error
  ./open_close_test-esx2.sh: line 8: can't create 
  ats_fileoptest-esx2_111.txt: Input/output error
  
  In the /var/log/vmkernel.log, we can see that the sense information is 
  missing (0xE, 0x0, 0x0) instead of (0xE, 0x1D, 0x0).
  2014-12-30T12:13:20.714Z cpu6:33519)ScsiDeviceIO: 2338: 
  Cmd(0x412e84f957c0) 0x89, CmdSN 0x234d from world 519051 to dev 
  "eui.0024f400d5020007" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0xe 0x0 0x0.
  2014-12-30T12:13:20.766Z cpu6:33519)ScsiDeviceIO: 2338: 
  Cmd(0x412e84f91d00) 0x89, CmdSN 0x2350 from world 519051 to dev 
  "eui.0024f400d5020007" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0xe 0x0 0x0.
  2014-12-30T12:13:20.766Z cpu6:33519)ScsiDeviceIO: 2338: 
  Cmd(0x412e80449fc0) 0x89, CmdSN 0x234f from world 519051 to dev 
  "eui.0024f400d5020007" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0xe 0x0 0x0.
  
  This patch fixes this issue, the test will run without a problem with the
  fix (no IO errors, all the files are properly written to the directory).
  
  Signed-off-by: Shahar Salzman <shahar.salzman@kaminario.com>
  Reviewed-by: Eran Mann <eran.mann@kaminario.com>
  [bvanassche: simplified implementation]
  Signed-off-by: Bart Van Assche <bvanassche@acm.org>
........


git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@6110 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2015-02-21 04:10:37 +00:00
Bart Van Assche f3f3a27273 scst_local: Add 64-bit LUN support (kernel 3.17 - merge r5588 from trunk) 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@5925 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-12-05 12:56:59 +00:00
Bart Van Assche 4efa37a0c7 scst_local: Set max_id to 1 (merge r5786 from trunk) 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@5923 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-12-05 12:25:46 +00:00
Bart Van Assche 31daca921d scst_local: Avoid that session deletion triggers a kernel warning (merge r5601 and 5631 from trunk) 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@5922 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-12-05 12:24:23 +00:00
Bart Van Assche 1871ca8abc Add kernel 3.17 build infrastructure (merge r5883 from trunk) 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@5907 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-12-03 17:13:06 +00:00
Bart Van Assche 89d1800244 Add kernel 3.16 nightly build infrastructure (merge r5719 from trunk) 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@5748 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-09-03 09:17:39 +00:00
Bart Van Assche 99100ec2a1 nightly build: Add kernel 3.15 build infrastructure (merge r5611 from trunk) 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@5636 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-06-29 05:25:55 +00:00
Bart Van Assche 87e512601a Skip "depmod" while building an RPM (merge r5612 from trunk) 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@5634 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-06-29 05:22:58 +00:00
Bart Van Assche 2b2b47bb85 nightly build: Add kernel 3.14 build infrastructure 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5433 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-04-18 05:50:04 +00:00
Vladislav Bolkhovitin eae78fb98c scst_local: Remove two superfluous tests 
The to_scst_lcl_sess() macro is based on container_of() and hence never
returns NULL. Hence remove the two tests that compare the result of that
macro against NULL.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5385 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-03-26 03:20:04 +00:00
Bart Van Assche 93b4c863dc scst_local: Add newline to sysfs output 
Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
[bvanassche: Reduced source code line length to 80 columns]


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5308 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-02-24 07:39:45 +00:00
Bart Van Assche 7d89372c53 Makefiles: respect DESTDIR when specified 
Not all SCST components handle DESTDIR properly, or at all.

In particular:
* INSTALL_MOD_PATH should account for DESTDIR when 'make modules_install'
  is invoked, so the kernel make infrastructure deploys the modules
  and runs depmod against the proper directory tree.
* depmods must include a '-b' option to reference the proper directory tree.
* Drop special ISCSI_DESTDIR.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5289 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-02-18 08:40:36 +00:00
Bart Van Assche 79b8ce942e Makefiles: calculate KVER properly 
When deriving the kernel version (KVER) from KDIR, the file
$(KDIR)/include/config/kernel.release should be preferred over
'make kernelversion'.

For example, the Ubuntu 3.2.0-23-generic kernel has a kernel.release
file containing '3.2.0-23-generic', but 'make kernelversion' returns
3.2.14. Since the modules are stored under /lib/modules/3.2.0-23-generic,
the value in kernel.release is the correct one to use.
    
Also:
- Evaluate KVER only once
- All depmod commands must include KVER
    
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
[bvanassche: Split long lines / removed trailing whitespace]


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5286 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-02-14 15:52:10 +00:00
Bart Van Assche e07a91e8a0 Makefiles: remove redundant 'depmod' invocations 
Running 'make modules_install' already triggers invocation of depmod,
hence leave it out from those Makefiles that use 'make modules_install'.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5283 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-02-14 13:05:55 +00:00
Bart Van Assche cf699a6d95 scst_local: Fix a kernel oops for kernel versions < 2.6.37 
Avoid that scst_local triggers "BUG: unable to handle kernel NULL
pointer dereference" on kernel versions before 2.6.37. This patch
fixes a regression introduced via patch "scst_local: Avoid
deadlock during module removal with kernel 3.6" (trunk r4566).

Reported-by: Sebastian Herbszt <herbszt@gmx.de>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5264 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-02-06 12:46:51 +00:00
Bart Van Assche 7f1c22cbee nightly build: Add kernel 3.13 build infrastructure 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5251 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-01-30 09:16:27 +00:00
Vladislav Bolkhovitin 00851a7501 Merge of adding iSER web page and copyright updates from the iSER branch 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5241 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2014-01-28 05:17:26 +00:00
Bart Van Assche f5a8248cb7 nightly build: Add kernel 3.12 build infrastructure 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5164 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-12-19 08:07:15 +00:00
Vladislav Bolkhovitin 81349d12a7 scst: Kernel >= 3.10 procfs build fix 
The following procfs-related changes have been included in kernel 3.10:
- The PDE() macro has been removed from <linux/proc_fs.h>.
- The create_proc_entry() function has been removed.
- The proc_info field has been removed from struct scsi_host_template.

Unbreak the procfs build for kernel versions >= 3.10



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5148 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-12-18 05:58:09 +00:00
Vladislav Bolkhovitin 1e4010ce25 Cleanup 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5082 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-10-31 03:48:59 +00:00
Bart Van Assche dad77aead4 nightly build: Add kernel 3.11 build infrastructure 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5006 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-09-28 16:04:47 +00:00
Bart Van Assche 89e96c6495 nightly build: Add kernel 3.10 support infrastructure 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4919 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-07-22 18:35:37 +00:00
Vladislav Bolkhovitin 29ff2f8c23 Cleanup: spin_is_locked() makes no sense on UP systems 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4885 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-05-28 03:59:57 +00:00
Bart Van Assche 11fdb1bf29 nightly build: Add kernel 3.9 build infrastructure 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4855 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-05-18 16:04:24 +00:00
Vladislav Bolkhovitin 0339bb8905 This change causes "make -C <dir> clean" to work. Also, use SUBDIRS=... 
instead of M=... because of consistency with the rest of the Makefile.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4829 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-03-29 01:19:24 +00:00
Vladislav Bolkhovitin e4fb5201e9 RHEL 5 does not support queue_flag_set_unlocked(). Hence disable the 
queue_flag_set_unlocked() call on RHEL 5.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4828 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-03-29 01:18:09 +00:00
Vladislav Bolkhovitin 2cadcc2c64 Cache alignment review 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4809 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-03-23 01:38:31 +00:00
Vladislav Bolkhovitin 82d055041c Improve automatic queue depth adjustment in scst_local for older kernels 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4800 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-03-16 02:02:55 +00:00
Vladislav Bolkhovitin 3a84cb7baf Automatic queue depth adjustment in scst_local 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4798 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-03-16 01:10:43 +00:00
Vladislav Bolkhovitin 369863f015 Allow install SCST in any location 
Currently the install location of SCST is pretty much hard coded into 
the Makefiles to be /usr/local.

I am custom building a system for ZFS & SCST and I want to install in 
/usr instead of /usr/local.

Currently I am doing a “find . -name Makefile -exec sed -i 's:/usr/local:/usr:g'
{} \;” to accommodate this.

This patch fixes it.

From Sietse van Zanen <sietse@wizdom.nu>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4791 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-03-08 21:25:45 +00:00
Vladislav Bolkhovitin b9c0b9d92d Another micro-optimization: cache align all fast path structures 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4785 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-03-04 23:51:16 +00:00
Bart Van Assche 52f0d63ee6 nightly build: Add kernel 3.8 support files 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4769 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-02-23 13:47:51 +00:00
Vladislav Bolkhovitin 10ca1d2f20 Copyrights updated 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4767 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-02-20 02:05:29 +00:00
Vladislav Bolkhovitin bd7c893f04 Multiple makefiles: autodetect SCST include directory 
It is cumbersome to change SCST_INC_DIR and SCST_DIR in each Makefile
before and after a release. Hence modify the Makefiles such that these
paths are detected automatically.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4740 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-01-16 00:12:38 +00:00
Vladislav Bolkhovitin c6d247254c scst_local: Remove a superfluous include path 
Target drivers must not include header files from the SCST source
code directory. Hence remove -I$(SCST_DIR) from the compiler flags.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4739 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-01-16 00:08:44 +00:00
Vladislav Bolkhovitin e7e9101efd Automate release archive generation 
This patch makes it easier to generate the release archives that
can be downloaded from http://scst.sourceforge.net/downloads.html.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4679 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2013-01-04 00:29:30 +00:00
Vladislav Bolkhovitin 1f600fcc91 scst_local: Fix bug in error path 
device_unregister() invokes scst_local_release_adapter() and hence unregisters
the session. Avoid that it is attempted a second time to unregister the
session which would result in a crash.

[3656]: scst: scst_unregister_target:680:Target local for template scst_local unregistered successfully
[3656]: scst: scst_unregister_target_template:457:Target template scst_local unregistered successfully
[3655]: scst_unregister_session:6795:Unregistering session ffff8800071a0000 (wait 0)
general protection fault: 0000 [#1] SMP
Modules linked in: iscsi_scst(O) scst_vdisk(O) scst(O) ntfs vfat msdos fat ext3 jbd ext2 brd netconsole configfs isofs ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi joydev hid_generic binfmt_misc usbhid hid intel_agp psmouse intel_gtt processor agpgart microcode i2c_piix4 button lp parport ext4 mbcache jbd2 floppy ata_piix zlib_deflate libcrc32c [last unloaded: scst_local]
CPU 1
Pid: 3655, comm: scsi_id Tainted: G           O 3.6.5-debug+ #1 Bochs Bochs
RIP: 0010:[<ffffffffa0221a74>]  [<ffffffffa0221a74>] scst_pre_rx_mgmt_cmd+0x64/0x210 [scst]
RSP: 0018:ffff88000304d598  EFLAGS: 00010246
RAX: 6b6b6b6b6b6b6b6b RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 000000000000000a RDI: ffff8800071a0000
RBP: ffff88000304d5c8 R08: 0000000000000002 R09: 0000000000000000
R10: 000000000000c81d R11: 0000000000000000 R12: ffff8800071a0000
R13: 000000000000000a R14: 0000000000000000 R15: ffff880000000000
FS:  00007fb6fe8c6700(0000) GS:ffff88003e000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00007f2169286bd0 CR3: 000000001cd26000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process scsi_id (pid: 3655, threadinfo ffff88000304c000, task ffff88003d9a0000)
Stack:
 0000000000000000 0000000000000282 ffff88000304d650 0000000000000000
 ffff8800071a0000 dead4ead00000000 ffff88000304d638 ffffffffa0221fdf
 0000000000000004 0000000000000000 ffff88000304d5f8 ffffffffa025d6a3
Call Trace:
 [<ffffffffa0221fdf>] scst_rx_mgmt_fn+0x7f/0x3a0 [scst]
 [<ffffffffa025d6a3>] ? spin_unlock_irqrestore.constprop.0+0x13/0x20 [scst]
 [<ffffffffa025d825>] ? debug_print_with_prefix+0x165/0x1f0 [scst]
 [<ffffffffa022acaa>] scst_rx_mgmt_fn_lun.constprop.34+0x4a/0x60 [scst]
 [<ffffffffa022adf1>] scst_unregister_session+0x131/0x320 [scst]
 [<ffffffff812bfce7>] ? device_release+0x27/0xa0
 [<ffffffff8120450b>] ? kobject_release+0x8b/0x1d0
 [<ffffffff8120438c>] ? kobject_put+0x2c/0x60
 [<ffffffff812bfa97>] ? put_device+0x17/0x20
 [<ffffffff812de820>] ? scsi_host_dev_release+0xc0/0xe0
 [<ffffffff812bfce7>] ? device_release+0x27/0xa0
 [<ffffffff8120450b>] ? kobject_release+0x8b/0x1d0
 [<ffffffff8120438c>] ? kobject_put+0x2c/0x60
 [<ffffffff812bfa97>] ? put_device+0x17/0x20
 [<ffffffff812e7102>] ? scsi_target_dev_release+0x22/0x30
 [<ffffffff812bfce7>] ? device_release+0x27/0xa0
 [<ffffffff8120450b>] ? kobject_release+0x8b/0x1d0
 [<ffffffff8120438c>] ? kobject_put+0x2c/0x60
 [<ffffffff812bfa97>] ? put_device+0x17/0x20
 [<ffffffff812ea858>] ? scsi_device_dev_release_usercontext+0x108/0x120
 [<ffffffff812ea750>] ? scsi_device_cls_release+0x20/0x20
 [<ffffffff8105a996>] ? execute_in_process_context+0x86/0xa0
 [<ffffffff812ea72c>] ? scsi_device_dev_release+0x1c/0x20
 [<ffffffff812bfce7>] ? device_release+0x27/0xa0
 [<ffffffff8120450b>] ? kobject_release+0x8b/0x1d0
 [<ffffffff8120438c>] ? kobject_put+0x2c/0x60
 [<ffffffff812bfa97>] ? put_device+0x17/0x20
 [<ffffffff812dc534>] ? scsi_device_put+0x44/0x60
 [<ffffffff812f685d>] ? scsi_cd_put+0x4d/0x70
 [<ffffffff812f69b0>] ? sr_block_open+0xd0/0x120
 [<ffffffff81184389>] ? __blkdev_get+0xe9/0x4a0
 [<ffffffff81183bb4>] ? bd_acquire+0x24/0xf0
 [<ffffffff81184a90>] ? blkdev_get+0x350/0x350
 [<ffffffff81184793>] ? blkdev_get+0x53/0x350
 [<ffffffff81156a72>] ? complete_walk+0x52/0x140
 [<ffffffff81184a90>] ? blkdev_get+0x350/0x350
 [<ffffffff814ac49b>] ? _raw_spin_unlock+0x2b/0x50
 [<ffffffff81184a90>] ? blkdev_get+0x350/0x350
 [<ffffffff81184afc>] ? blkdev_open+0x6c/0x90
 [<ffffffff81148fb6>] ? do_dentry_open.isra.19+0x216/0x2a0
 [<ffffffff81149062>] ? finish_open+0x22/0x40
 [<ffffffff8115a62e>] ? do_last+0x72e/0xe20
 [<ffffffff811572d8>] ? inode_permission+0x18/0x50
 [<ffffffff8115737b>] ? link_path_walk+0x6b/0x930
 [<ffffffff8115add6>] ? path_openat+0xb6/0x4a0
 [<ffffffff81097c9d>] ? trace_hardirqs_on+0xd/0x10
 [<ffffffff8115b5d2>] ? do_filp_open+0x42/0xa0
 [<ffffffff814ac49b>] ? _raw_spin_unlock+0x2b/0x50
 [<ffffffff81168802>] ? alloc_fd+0xd2/0x120
 [<ffffffff8114a150>] ? do_sys_open+0x100/0x1e0
 [<ffffffff8114a251>] ? sys_open+0x21/0x30
 [<ffffffff814b5029>] ? system_call_fastpath+0x16/0x1b
Code: 00 00 65 48 8b 04 25 80 ba 00 00 8b b0 94 01 00 00 48 c7 c2 a0 b8 26 a0 31 c0 48 c7 c7 45 e0 27 a0 e8 23 15 28 e1 49 8b 44 24 08 <48> 8b 40 30 48 83 78 50 00 0f 84 52 01 00 00 83 fb 01 19 ff 81

Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4658 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-12-20 02:32:25 +00:00
Bart Van Assche 12313bf114 nightly build: Add kernel 3.7 patches 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4647 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-12-18 08:54:50 +00:00
Vladislav Bolkhovitin 010dd8b7ec scst_local: Rework scst_local_get_initiator_port_transport_id() to make it easier to read and to verify 
Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4636 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-11-29 01:29:49 +00:00
Vladislav Bolkhovitin 486a3bcd34 scst_local: Remove superfluous casts 
Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4635 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-11-29 01:25:59 +00:00
Bart Van Assche a88ccc6231 scst_local, RHEL 5: Avoid that AEN handling triggers a deadlock during device removal 
Signed-off-by: Richard Sharpe <realrichardsharpe@gmail.com>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4613 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-11-12 12:37:19 +00:00
Vladislav Bolkhovitin fab0164c55 scst_local: Avoid deadlock during module removal with kernel 3.6 
Since kernel 3.6 a SYNCHRONIZE CACHE command is sent to SCSI disks
during the scsi_remove_host() call. That command is sent after command
processing has been suspended in SCST and hence causes a deadlock.
Avoid this deadlock by failing all commands issued after
scst_unregister_target() has been invoked.

The output of echo w >/proc/sysrq-trigger just after module removal of
scst_local started is as follows:

SysRq : Show Blocked State
  task                        PC stack   pid father
kworker/2:1     D ffff88003d08cf40     0    37      2 0x00000000
 ffff88003d0bd830 0000000000000046 ffffffff814a849e ffff88003d08cf40
 ffff88003d08cf40 ffff88003d0bdfd8 ffff88003d0bdfd8 ffff88003d0bdfd8
 ffff88003d9a3b70 ffff88003d08cf40 0000000000000282 ffff88003d0bd860
Call Trace:
 [<ffffffff814a849e>] ? schedule_timeout+0x12e/0x230
 [<ffffffff814aabc9>] schedule+0x29/0x70
 [<ffffffff814a84a3>] schedule_timeout+0x133/0x230
 [<ffffffff8104cc00>] ? __internal_add_timer+0x140/0x140
 [<ffffffff814aaa72>] wait_for_common+0x122/0x170
 [<ffffffff81074050>] ? try_to_wake_up+0x2c0/0x2c0
 [<ffffffff814aab73>] wait_for_completion_timeout+0x13/0x20
 [<ffffffff811edc2b>] blk_execute_rq+0x17b/0x200
 [<ffffffff814aa993>] ? wait_for_common+0x43/0x170
 [<ffffffff81180a51>] ? bio_phys_segments+0x21/0x30
 [<ffffffff811e8cf0>] ? blk_rq_bio_prep+0x30/0xb0
 [<ffffffff812e46ee>] scsi_execute+0xee/0x180
 [<ffffffff812e58ed>] scsi_execute_req+0xbd/0x130
 [<ffffffff812f55c0>] sr_check_events+0xc0/0x2d0
 [<ffffffff81076218>] ? sched_clock_cpu+0xa8/0x110
 [<ffffffff8131e1cc>] cdrom_check_events+0x1c/0x40
 [<ffffffff812f5a39>] sr_block_check_events+0x19/0x20
 [<ffffffff811f0e32>] disk_events_workfn+0x62/0x160
 [<ffffffff8105affe>] process_one_work+0x1ae/0x620
 [<ffffffff8105af9d>] ? process_one_work+0x14d/0x620
 [<ffffffff811f0dd0>] ? __disk_unblock_events+0x130/0x130
 [<ffffffff8105ce97>] worker_thread+0x187/0x4e0
 [<ffffffff8105cd10>] ? manage_workers+0x320/0x320
 [<ffffffff81062a07>] kthread+0xb7/0xc0
 [<ffffffff81097b35>] ? trace_hardirqs_on_caller+0x105/0x190
 [<ffffffff814b5d04>] kernel_thread_helper+0x4/0x10
 [<ffffffff814ac870>] ? retint_restore_args+0x13/0x13
 [<ffffffff81062950>] ? flush_kthread_work+0x1e0/0x1e0
 [<ffffffff814b5d00>] ? gs_change+0x13/0x13
rmmod           D ffff88001d46a7a0     0 10456  10437 0x00000004
 ffff8800393cd7a8 0000000000000046 ffffffff814a849e ffff88001d46a7a0
 ffff88001d46a7a0 ffff8800393cdfd8 ffff8800393cdfd8 ffff8800393cdfd8
 ffffffff81a13420 ffff88001d46a7a0 0000000000000282 ffff8800393cd7d8
Call Trace:
 [<ffffffff814a849e>] ? schedule_timeout+0x12e/0x230
 [<ffffffff814aabc9>] schedule+0x29/0x70
 [<ffffffff814a84a3>] schedule_timeout+0x133/0x230
 [<ffffffff8104cc00>] ? __internal_add_timer+0x140/0x140
 [<ffffffff814aaa72>] wait_for_common+0x122/0x170
 [<ffffffff81074050>] ? try_to_wake_up+0x2c0/0x2c0
 [<ffffffff814aab73>] wait_for_completion_timeout+0x13/0x20
 [<ffffffff811edc2b>] blk_execute_rq+0x17b/0x200
 [<ffffffff814aa993>] ? wait_for_common+0x43/0x170
 [<ffffffff81063000>] ? __init_waitqueue_head+0x60/0x60
 [<ffffffff812e46ee>] scsi_execute+0xee/0x180
 [<ffffffff812e58ed>] scsi_execute_req+0xbd/0x130
 [<ffffffff812f07a8>] sd_sync_cache+0x98/0x120
 [<ffffffff812f0a40>] sd_shutdown+0xd0/0x150
 [<ffffffff812f0b3c>] sd_remove+0x7c/0xc0
 [<ffffffff812c3e6c>] __device_release_driver+0x7c/0xf0
 [<ffffffff812c3f0e>] device_release_driver+0x2e/0x40
 [<ffffffff812c380f>] bus_remove_device+0xff/0x170
 [<ffffffff812c099d>] device_del+0x12d/0x1c0
 [<ffffffff812eae1d>] __scsi_remove_device+0x10d/0x120
 [<ffffffff812e97ef>] scsi_forget_host+0x6f/0x80
 [<ffffffff812deb8a>] scsi_remove_host+0x7a/0x130
 [<ffffffffa0287bea>] scst_local_driver_remove+0x5a/0x120 [scst_local]
 [<ffffffff812c3e6c>] __device_release_driver+0x7c/0xf0
 [<ffffffff812c3f0e>] device_release_driver+0x2e/0x40
 [<ffffffff812c380f>] bus_remove_device+0xff/0x170
 [<ffffffff812c099d>] device_del+0x12d/0x1c0
 [<ffffffffa028ae21>] ? scst_local_exit+0x6b/0x24a [scst_local]
 [<ffffffff812c0a52>] device_unregister+0x22/0x60
 [<ffffffffa0287649>] scst_local_remove_adapter+0x59/0xd0 [scst_local]
 [<ffffffffa02880ab>] __scst_local_remove_target+0x7b/0x130 [scst_local]
 [<ffffffffa028ae3a>] scst_local_exit+0x84/0x24a [scst_local]
 [<ffffffff810a2d26>] sys_delete_module+0x1a6/0x2b0
 [<ffffffff814ac855>] ? retint_swapgs+0x13/0x1b
 [<ffffffff8120ebfe>] ? trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff814b4b29>] system_call_fastpath+0x16/0x1b

Signed-off-by: Bart Van Assche <bvanassche@acm.org>




git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4566 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-10-23 01:08:47 +00:00
Bart Van Assche b2567396f8 nightly build: Add kernel 3.6 support patches 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4539 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-10-02 08:17:58 +00:00
Vladislav Bolkhovitin d2d0c488aa scst_local_add_target(): Also set *out_tgt upon failure 
Although the callers of scst_local_add_target() do not use the
value of *out_tgt if scst_local_add_target() reports that it failed,
set *out_tgt in that case to avoid that sparse reports the following
(false positive) warning:

scst_local/scst_local.c:1807: warning: 'tgt' may be used uninitialized in this function

Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4534 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-09-29 22:33:20 +00:00
Vladislav Bolkhovitin 8ce28aaba2 Avoid that enabling a target too quickly triggers a crash 
The sysfs attributes of a target can be accessed before scst_tgt.tgt_priv
has been set. Avoid that such an access triggers a crash.

Symptom:
BUG: unable to handle kernel NULL pointer dereference at 000000000000004c
IP: [<ffffffffa1345848>] iscsi_is_target_enabled+0x8/0x20 [iscsi_scst]
PGD 150a4c067 PUD 13cacb067 PMD 0
Oops: 0000 [#1] SMP
CPU 1
Modules linked in: zfs(P) iscsi_scst(O) scst_vdisk(O) scst(O) zcommon(P) znvpair(P) zavl(P) zunicode(P) spl(O) [last unloaded: zfs]
Pid: 3974, comm: scst_uid1864 Tainted: P           O 3.2.23-zfsiscsi-std-ipv6-64 #3 Supermicro X6DVA/X6DVA
RIP: 0010:[<ffffffffa1345848>]  [<ffffffffa1345848>] iscsi_is_target_enabled+0x8/0x20 [iscsi_scst]
RSP: 0018:ffff88015071ddc0  EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff880181fdaa00 RCX: ffff88012d41f380
RDX: ffff88015071c010 RSI: 0000000000000000 RDI: ffff880181fdaa00
RBP: ffff88015071ddc0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000001 R12: ffffffffa134a608
R13: 0000000000000000 R14: 0000000000000129 R15: ffffffffa134a4c0
FS:  0000000000000000(0000) GS:ffff88019fc80000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 000000000000004c CR3: 0000000151927000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process scst_uid1864 (pid: 3974, threadinfo ffff88015071c000, task ffff880194d57500)
Stack:
 ffff88015071de10 ffffffffa12ee89a 00000000fffffffc 01ff88015071de98
 ffff88015071de80 ffff8801932a48d8 00000000fffffffc ffff88015071de98
 ffff88015071de80 ffff880194d57500 ffff88015071de30 ffffffffa12f582e
Call Trace:
 [<ffffffffa12ee89a>] __scst_is_relative_target_port_id_unique+0x6a/0xc0 [scst]
 [<ffffffffa12f582e>] gen_relative_target_port_id+0x6e/0xd0 [scst]
 [<ffffffffa12fdb8a>] scst_tgt_enable_store_work_fn+0x3a/0xe0 [scst]
 [<ffffffffa12f9397>] sysfs_work_thread_fn+0xc7/0x2e0 [scst]
 [<ffffffffa12f92d0>] ? scst_tgtt_release+0x20/0x20 [scst]
 [<ffffffffa12f92d0>] ? scst_tgtt_release+0x20/0x20 [scst]
 [<ffffffff810b44f6>] kthread+0x96/0xa0
 [<ffffffff81b8ed74>] kernel_thread_helper+0x4/0x10
 [<ffffffff810b4460>] ? kthread_worker_fn+0x180/0x180
 [<ffffffff81b8ed70>] ? gs_change+0xb/0xb
Code: 42 c8 74 0f 39 78 48 75 ea c9 c3 0f 1f 84 00 00 00 00 00 31 c0 c9 c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 8b 47 48 55 48 89 e5 <0f> b6 40 4c c9 83 e0 01 c3 66 66 66 66 66 66 2e 0f 1f 84 00 00
RIP  [<ffffffffa1345848>] iscsi_is_target_enabled+0x8/0x20 [iscsi_scst]
 RSP <ffff88015071ddc0>
CR2: 000000000000004c
---[ end trace 6311d4069703be07 ]---

Reported-by: Etienne Dechamps <e-t172@akegroup.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org> with some modifications



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4515 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-09-12 22:13:43 +00:00
Vladislav Bolkhovitin 89296abc5e Fix incorrect errors handling. Detected by smatch. 
Signed-off-by: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4493 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-08-27 22:14:47 +00:00
Vladislav Bolkhovitin 0ab789c476 scst_local: Remove a superfluous if-test 
It is not necessary to test whether a pointer is not NULL before invoking
kfree(). Detected by smatch.

From: Bart Van Assche <bvanassche@acm.org>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4485 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-08-27 21:45:35 +00:00
Vladislav Bolkhovitin 1b68210cce Fix possible commands hangs with lockless queuecommand() in scst_local 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4463 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-08-10 01:48:35 +00:00
Bart Van Assche e0f7025708 nightly build: Add kernel 3.5 build infrastructure 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4460 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-08-09 08:07:26 +00:00
Vladislav Bolkhovitin fabf9fceda Avoid that removing the scst_local kernel module triggers a deadlock 
when one of its LUNs is a CD-ROM device. sr_block_release() invokes
scst_local_release_adapter() indirectly with sr_mutex held. So if 
scst_local_release_adapter() blocks until the scst_local session has
been freed a deadlock may be triggered if another CD-ROM device has
to be closed in order to free that session. Fix this by changing
scst_local_release_adapter() such that it does not wait until the
session unregistration has finished.

Call stacks obtained with echo w > /proc/sysrq-trigger:

SysRq : Show Blocked State
  task                        PC stack   pid father
scst_mgmtd      D ffffffff812f979d     0  5552      2 0x00000000
 ffff88003c335b30 0000000000000046 ffffffff812f979d 0000000000000002
 ffff8800171d47a0 ffff88003c335fd8 ffff88003c335fd8 ffff88003c335fd8
 ffff88003d1b0000 ffff8800171d47a0 ffff88003c335b60 ffff88003c334000
Call Trace:
 [<ffffffff812f979d>] ? sr_block_release+0x2d/0x60
 [<ffffffff812f979d>] ? sr_block_release+0x2d/0x60
 [<ffffffff814a9b19>] schedule+0x29/0x70
 [<ffffffff814a9e57>] schedule_preempt_disabled+0x27/0x40
 [<ffffffff814a79b7>] mutex_lock_nested+0x187/0x390
 [<ffffffff812f979d>] ? sr_block_release+0x2d/0x60
 [<ffffffff812f979d>] sr_block_release+0x2d/0x60
 [<ffffffff8118a1ec>] __blkdev_put+0x19c/0x1d0
 [<ffffffff8118a27d>] blkdev_put+0x5d/0x180
 [<ffffffff8118a3c8>] blkdev_close+0x28/0x30
 [<ffffffff81153633>] fput+0x103/0x280
 [<ffffffff8114fad9>] filp_close+0x69/0x90
 [<ffffffffa022ec24>] vdisk_detach_tgt+0x134/0x150 [scst_vdisk]
 [<ffffffffa02d8f2f>] scst_free_tgt_dev+0xdf/0x220 [scst]
 [<ffffffffa02d949f>] ? scst_free_session_callback+0x7f/0x170 [scst]
 [<ffffffffa02d90eb>] scst_sess_free_tgt_devs+0x7b/0x110 [scst]
 [<ffffffffa02d91de>] scst_free_session+0x5e/0x2a0 [scst]
 [<ffffffffa02d94be>] scst_free_session_callback+0x9e/0x170 [scst]
 [<ffffffffa02c6a05>] scst_global_mgmt_thread+0x2e5/0x580 [scst]
 [<ffffffff8105e850>] ? __init_waitqueue_head+0x60/0x60
 [<ffffffffa02c6720>] ? scst_register_session_non_gpl+0x20/0x20 [scst]
 [<ffffffff8105dd77>] kthread+0xb7/0xc0
 [<ffffffff814b50b4>] kernel_thread_helper+0x4/0x10
 [<ffffffff814abb30>] ? retint_restore_args+0x13/0x13
 [<ffffffff8105dcc0>] ? __init_kthread_worker+0x70/0x70
 [<ffffffff814b50b0>] ? gs_change+0x13/0x13
iscsi-scstd     D ffffffffa02b1b1f     0  5567      1 0x00000004
 ffff88003c2f59a8 0000000000000046 ffffffffa02b1b1f 0000000000000002
 ffff8800173b23d0 ffff88003c2f5fd8 ffff88003c2f5fd8 ffff88003c2f5fd8
 ffff88003d198000 ffff8800173b23d0 ffff88003c2f59d8 ffff88003c2f4000
Call Trace:
 [<ffffffffa02b1b1f>] ? scst_unregister_target+0x8f/0x450 [scst]
 [<ffffffffa02b1b1f>] ? scst_unregister_target+0x8f/0x450 [scst]
 [<ffffffff814a9b19>] schedule+0x29/0x70
 [<ffffffff814a9e57>] schedule_preempt_disabled+0x27/0x40
 [<ffffffff814a79b7>] mutex_lock_nested+0x187/0x390
 [<ffffffffa02b1b1f>] ? scst_unregister_target+0x8f/0x450 [scst]
 [<ffffffffa025c7ba>] ? __iscsi_del_attr+0xea/0x190 [iscsi_scst]
 [<ffffffffa02b1b1f>] scst_unregister_target+0x8f/0x450 [scst]
 [<ffffffffa025c7ba>] ? __iscsi_del_attr+0xea/0x190 [iscsi_scst]
 [<ffffffffa026249f>] target_destroy+0x5f/0xc0 [iscsi_scst]
 [<ffffffffa02631f2>] target_del_all+0xf2/0x2d0 [iscsi_scst]
 [<ffffffffa025c8aa>] release+0x4a/0xe0 [iscsi_scst]
 [<ffffffff81153633>] fput+0x103/0x280
 [<ffffffff8114fad9>] filp_close+0x69/0x90
 [<ffffffff8103e533>] put_files_struct+0x103/0x1c0
 [<ffffffff8103e478>] ? put_files_struct+0x48/0x1c0
 [<ffffffff8103e6b2>] exit_files+0x52/0x60
 [<ffffffff8103eb80>] do_exit+0x180/0x8e0
 [<ffffffff8104ef87>] ? get_signal_to_deliver+0xe7/0x6e0
 [<ffffffff8103f631>] do_group_exit+0x51/0xc0
 [<ffffffff8104f0bf>] get_signal_to_deliver+0x21f/0x6e0
 [<ffffffff8100223c>] do_signal+0x3c/0x580
 [<ffffffff81002805>] do_notify_resume+0x65/0xa0
 [<ffffffff812149de>] ? trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff814b4122>] int_signal+0x12/0x17
rmmod           D ffffffffa02b1b70     0  5714   5681 0x00000000
 ffff88000b497d48 0000000000000046 ffffffffa02b1b70 0000000000000002
 ffff88003920a3d0 ffff88000b497fd8 ffff88000b497fd8 ffff88000b497fd8
 ffff88003d17a3d0 ffff88003920a3d0 ffff88000b497d78 ffff88000b496000
Call Trace:
 [<ffffffffa02b1b70>] ? scst_unregister_target+0xe0/0x450 [scst]
 [<ffffffffa02b1b70>] ? scst_unregister_target+0xe0/0x450 [scst]
 [<ffffffff814a9b19>] schedule+0x29/0x70
 [<ffffffff814a9e57>] schedule_preempt_disabled+0x27/0x40
 [<ffffffff814a79b7>] mutex_lock_nested+0x187/0x390
 [<ffffffffa02b1b70>] ? scst_unregister_target+0xe0/0x450 [scst]
 [<ffffffffa02b1b70>] scst_unregister_target+0xe0/0x450 [scst]
 [<ffffffffa0287e51>] ? scst_local_exit+0x6b/0x21a [scst_local]
 [<ffffffff812c2d37>] ? put_device+0x17/0x20
 [<ffffffff812c3efa>] ? device_unregister+0x2a/0x60
 [<ffffffffa0285108>] __scst_local_remove_target+0xa8/0x130 [scst_local]
 [<ffffffffa0287e6a>] scst_local_exit+0x84/0x21a [scst_local]
 [<ffffffff810a40c6>] sys_delete_module+0x1a6/0x2b0
 [<ffffffff812149de>] ? trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff814b3de9>] system_call_fastpath+0x16/0x1b
ata_id          D ffff88003920c7a0     0  5715   5195 0x00000000
 ffff880015e97818 0000000000000046 0000000000000000 0000000000000046
 ffff88003920c7a0 ffff880015e97fd8 ffff880015e97fd8 ffff880015e97fd8
 ffff880021788000 ffff88003920c7a0 ffff880015e977f8 7fffffffffffffff
Call Trace:
 [<ffffffff814a9b19>] schedule+0x29/0x70
 [<ffffffff814a7355>] schedule_timeout+0x315/0x390
 [<ffffffff814a98e3>] ? wait_for_common+0x43/0x170
 [<ffffffff814a98e3>] ? wait_for_common+0x43/0x170
 [<ffffffff814a99c2>] wait_for_common+0x122/0x170
 [<ffffffff810705b0>] ? try_to_wake_up+0x2f0/0x2f0
 [<ffffffff814a9aed>] wait_for_completion+0x1d/0x20
 [<ffffffffa02bfad3>] scst_unregister_session+0x1a3/0x320 [scst]
 [<ffffffffa0284990>] scst_local_release_adapter+0xa0/0x140 [scst_local]
 [<ffffffff812c2f87>] device_release+0x27/0xa0
 [<ffffffff81209abb>] kobject_release+0x8b/0x1d0
 [<ffffffff8120993c>] kobject_put+0x2c/0x60
 [<ffffffff812c2d37>] put_device+0x17/0x20
 [<ffffffff812e1850>] scsi_host_dev_release+0xc0/0xe0
 [<ffffffff812c2f87>] device_release+0x27/0xa0
 [<ffffffff81209abb>] kobject_release+0x8b/0x1d0
 [<ffffffff8120993c>] kobject_put+0x2c/0x60
 [<ffffffff812c2d37>] put_device+0x17/0x20
 [<ffffffff812ea0c2>] scsi_target_dev_release+0x22/0x30
 [<ffffffff812c2f87>] device_release+0x27/0xa0
 [<ffffffff81209abb>] kobject_release+0x8b/0x1d0
 [<ffffffff8120993c>] kobject_put+0x2c/0x60
 [<ffffffff812c2d37>] put_device+0x17/0x20
 [<ffffffff812ed818>] scsi_device_dev_release_usercontext+0x118/0x130
 [<ffffffff812ed700>] ? scsi_device_cls_release+0x20/0x20
 [<ffffffff81056576>] execute_in_process_context+0x86/0xa0
 [<ffffffff812ed6dc>] scsi_device_dev_release+0x1c/0x20
 [<ffffffff812c2f87>] device_release+0x27/0xa0
 [<ffffffff81209abb>] kobject_release+0x8b/0x1d0
 [<ffffffff8120993c>] kobject_put+0x2c/0x60
 [<ffffffff812c2d37>] put_device+0x17/0x20
 [<ffffffff812df594>] scsi_device_put+0x44/0x60
 [<ffffffff812f974d>] scsi_cd_put+0x4d/0x70
 [<ffffffff812f97b1>] sr_block_release+0x41/0x60
 [<ffffffff8118a1ec>] __blkdev_put+0x19c/0x1d0
 [<ffffffff8118a27d>] blkdev_put+0x5d/0x180
 [<ffffffff8118a3c8>] blkdev_close+0x28/0x30
 [<ffffffff81153633>] fput+0x103/0x280
 [<ffffffff814a93b3>] ? __schedule+0x3c3/0x820
 [<ffffffff8114fad9>] filp_close+0x69/0x90
 [<ffffffff8114fba0>] sys_close+0xa0/0x100
 [<ffffffff814b3de9>] system_call_fastpath+0x16/0x1b

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Richard Sharpe <realrichardsharpe@gmail.com>




git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4425 d57e44dd-8a1f-0410-8b47-8ef2f437770f
 2012-07-27 01:14:55 +00:00