I can replicate this 100% of the time on my setup. When running iscsiadm
commands to logout, print session info, maybe others, the iscsid processes
hang on the semaphore in log_do_log_daemon. I've attached an example and
some stack traces. Removing the contents of log_do_log_daemon() in
usr/log.c fixes the problem for me, but obviously this is not a real
solution.
I'm running 2.0-873 on a powerpc machine emulated in qemu.
Seems very similar to
https://groups.google.com/forum/#!msg/open-iscsi/VLzDe_CxCMc/juniV1rt1SMJ
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~ # iscsiadm --mode session -P 3
iSCSI Transport Class version 2.0-870
version 2.0-873
Target: blah:test
Current Portal: 192.168.1.33:3260,1
Persistent Portal: 192.168.1.33:3260,1
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.2005-03.org.open-iscsi:9c8b5c1ee6
Iface IPaddress: 192.168.1.18
Iface HWaddress: <empty>
Iface Netdev: <empty>
SID: 1
--This is where it hangs each time--
~ # ps | grep iscsi
389 root 0 SW< [iscsi_eh]
1116 root 2428 R /usr/sbin/iscsid
1117 root 3796 S < /usr/sbin/iscsid
1124 root 0 SW< [iscsi_q_0]
1132 root 0 Z < [iscsid]
1161 root 2968 S iscsiadm --mode session -P 3
1163 root 2516 S grep iscsi
iscsid 1116:
(gdb) where
#0 0x1000a294 in log_dequeue (buff=<optimized out>) at log.c:239
#1 0x1000a310 in log_flush () at log.c:380
#2 0x1000ab5c in log_init (
program_name=program_name@entry=0x10075fac "iscsid",
size=size@entry=16384, func=<optimized out>, priv=priv@entry=0x0)
at log.c:456
#3 0x10001dc4 in main (argc=1, argv=0xbfbfe134) at iscsid.c:393
iscsid 1117:
(gdb) where
#0 0x0ff603a0 in semop () from /lib/libc.so.6
#1 0x1000a0d8 in log_do_log_daemon (prio=4, priv=<optimized out>,
fmt=0x100563c0 "Connection%d:%d to [target: %s, portal: %s,%d] through
[iface: %s] is operational now", ap=0xbfbfda48) at log.c:270
#2 0x1000a51c in log_warning (
fmt=fmt@entry=0x100563c0 "Connection%d:%d to [target: %s, portal: %s,%d]
through [iface: %s] is operational now") at log.c:299
#3 0x10026208 in setup_full_feature_phase (conn=0x100b7cb8)
at initiator.c:1041
#4 iscsi_recv_login_rsp (conn=0x100b7cb8) at initiator.c:1277
#5 session_conn_recv_pdu (data=<optimized out>) at initiator.c:1301
#6 0x10027474 in actor_poll () at actor.c:276
#7 0x100278ec in event_loop (ipc=0x10075eec, control_fd=control_fd@entry=7,
mgmt_ipc_fd=5) at event_poll.c:169
#8 0x1000204c in main (argc=<optimized out>, argv=<optimized out>)
at iscsid.c:538
iscsiadm:
(gdb) where
#0 0x0ff5f584 in recv () from /lib/libc.so.6
#1 0x10020e48 in iscsid_response (fd=3, cmd=MGMT_IPC_SESSION_INFO,
rsp=rsp@entry=0xbf9397d8) at iscsid_req.c:121
#2 0x10020f28 in iscsid_exec_req (req=req@entry=0xbf9365c8,
rsp=rsp@entry=0xbf9397d8, start_iscsid=start_iscsid@entry=1)
at iscsid_req.c:143
#3 0x1001c0c0 in print_iscsi_state (sid=1, prefix=prefix@entry=0x1004d87c "")
at session_info.c:111
#4 0x1001c804 in session_info_print_tree (list=list@entry=0xbf93a274,
prefix=prefix@entry=0x1004d87c "", flags=flags@entry=127,
do_show=do_show@entry=0) at session_info.c:279
#5 0x1001d050 in session_info_print (info_level=info_level@entry=3,
info=info@entry=0x0, do_show=do_show@entry=0) at session_info.c:410
#6 0x100030b0 in main (argc=5, argv=0xbf93b8b4) at iscsiadm.c:2811
