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kernel >= 4.14
The upstream iscsitarget source does not have support to build
with Linux kernel >= 4.14, as the "struct bio" members has been updated
in the linux kernel v4.14 source. Requires major code change in
iscsitarget to support building later versions of Linux kernel.
The Linux SCSI target framework (tgt) recipe present in meta-openstack
layer, can be used as a substitute to iscsitarget recipe and works fine
in our testing.
Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa@mvista.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
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This patch fixes below inconsistent crash when trying to login to iSCSI target
server, observed with linux kernel v4.1.
-- snip --
CPU: 1 PID: 29883 Comm: istd1 Tainted: G O 4.1.35-rt40-yocto-standard #1
Hardware name: To be filled by O.E.M. To be filled by O.E.M./Larne CRB, BIOS 4.6.5.4 09/18/2014
task: ffff88020f1f30c0 ti: ffff8800d7f3c000 task.ti: ffff8800d7f3c000
RIP: 0010:[<ffffffff8140d1ae>] [<ffffffff8140d1ae>] copy_to_iter+0x3e/0x280
RSP: 0018:ffff8800d7f3f728 EFLAGS: 00010246
RAX: 00000000d7f3f928 RBX: 0000000000000030 RCX: 0000000000000030
RDX: ffff8800d7f3f900 RSI: 0000000000000030 RDI: ffff8800d1501e82
RBP: ffff8800d7f3f768 R08: 00000000c127d467 R09: 0000000000000000
R10: ffff88020f29e118 R11: 0000000000000004 R12: ffff8800d7f3f900
R13: 0000000000000030 R14: 0000000000000001 R15: 0000000000000246
FS: 00007f86f9c4c700(0000) GS:ffff88021ec80000(0000) knlGS:00000000f7733700
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000024e CR3: 00000000d38b0000 CR4: 00000000000406e0
Stack:
ffff880214f14ec0 ffff8800d1501e82 ffff8800d7f3f748 0000000000000030
ffff88020f122500 0000000000000030 0000000000000000 0000000000000030
ffff8800d7f3f7c8 ffffffff81806981 ffff8800d7f3f798 ffffffff8105d72a
Call Trace:
[<ffffffff81806981>] skb_copy_datagram_iter+0x71/0x2b0
[<ffffffff8105d72a>] ? __local_bh_enable_ip+0x4a/0xb0
[<ffffffff8186c9c0>] tcp_recvmsg+0x5e0/0xbb0
[<ffffffff81898ded>] inet_recvmsg+0x8d/0xb0
[<ffffffff817f49f3>] sock_recvmsg+0x13/0x20
[<ffffffffa01655c3>] do_recv+0xe3/0x1f0 [iscsi_trgt]
[<ffffffff81153097>] ? __mod_zone_page_state+0x77/0xb0
[<ffffffff81417613>] ? __this_cpu_preempt_check+0x13/0x20
[<ffffffff81153097>] ? __mod_zone_page_state+0x77/0xb0
[<ffffffff8140fed5>] ? find_next_bit+0x15/0x30
[<ffffffff813fa8e0>] ? cpumask_next_and+0x30/0x50
[<ffffffff8113f785>] ? __alloc_pages_nodemask+0x165/0x980
[<ffffffff8107e370>] ? preempt_count_add+0xd0/0xf0
[<ffffffff8195da8b>] ? _raw_spin_lock+0x1b/0x60
[<ffffffff8109cfa8>] ? cpuacct_charge+0x58/0x70
[<ffffffff81089039>] ? update_curr+0xb9/0x190
[<ffffffff81417613>] ? __this_cpu_preempt_check+0x13/0x20
[<ffffffff8112b43f>] ? __perf_event_task_sched_in+0x4f/0x90
[<ffffffff8195dbbd>] ? _raw_spin_unlock_irq+0x1d/0x40
[<ffffffff8107e223>] ? finish_task_switch+0x63/0xe0
[<ffffffff81959e3b>] ? __schedule+0x38b/0x980
[<ffffffff8107e370>] ? preempt_count_add+0xd0/0xf0
[<ffffffffa0165c65>] istd+0x4d5/0x1390 [iscsi_trgt]
[<ffffffff81959e3b>] ? __schedule+0x38b/0x980
[<ffffffffa0165790>] ? nthread_wakeup+0x40/0x40 [iscsi_trgt]
[<ffffffffa0165790>] ? nthread_wakeup+0x40/0x40 [iscsi_trgt]
[<ffffffff8107748b>] kthread+0xbb/0xe0
[<ffffffff81950000>] ? wireless_dev_seq_show+0x100/0x180
[<ffffffff810773d0>] ? kthread_worker_fn+0x170/0x170
[<ffffffff8195e7a2>] ret_from_fork+0x42/0x70
[<ffffffff810773d0>] ? kthread_worker_fn+0x170/0x170
Code: 5a 10 48 89 7d c8 48 39 f3 48 0f 47 de 48 85 db 0f 84 6f 01 00 00 8b 02 49 89
d4 4c 8b 72 08 4c 8b 7a 18 a8 04 0f 85 a2 00 00 00 <4d> 8b 6f 08 4d 29 f5 49 39 dd 4c 0f 47 eb a8 02 0f 85 5c 01 00
RSP <ffff8800d7f3f728>
CR2: 000000000000024e
------------[ cut here ]------------
-- snip --
The original patch is at
http://launchpadlibrarian.net/218100509/iscsitarget_1.4.20.3+svn499-0ubuntu2_1.4.20.3+svn499-0ubuntu2.1.diff.gz,
those changes were taken using #ifs, inorder to allow compilation of
iscsitarget package with linux kernels < 3.19.
Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa@mvista.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
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iSCSI Enterprise Target is aimed to develop an
open source iSCSI target with professional features,
that works well in enterprise environment under real
workload, and is scalable and versatile enough to meet the
challenge of future storage needs and developments.
Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa@mvista.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
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