ipmitool-1.8.11 does not display sensor threshold on Dell 1855 blade server:
# ipmitool sensor list
Mem Temp 2 | na | degrees C | na | na | na
| na | na | na | na
With older version (ipmitool-1.8.9), I can get some values:
# ipmitool sensor list
Mem Temp 2 | na | degrees C | ok | na | 5.000 |
10.000 | 75.000 | 80.000 | na
I dug into sources and I have found out, that sensor readings were
modified in CVS version 1.33 of lib/ipmi_sensors.c. There are many
similar changes like:
-rsp = ipmi_sdr_get_sensor_thresholds(intf, sensor->keys.sensor_num);
+rsp = ipmi_sdr_get_sensor_thresholds(intf, sensor->keys.sensor_num,
+ sensor->keys.owner_id, sensor->keys.lun);
and in ipmi_sdr_get_sensor_thresholds():
+ save_addr = intf->target_addr;
+ intf->target_addr = target;
...send the message...
+ intf->target_addr = save_addr;
This causes that the messages requesting thresholds are sent to slave
address "c0" (addr_type == IPMI_IPMB_ADDR_TYPE), instead to BMC
directly. Using '-vvv' option prints "Sending request to IPMB target @
0xc0" and some errors like "Error reading event status for sensor #07:
Invalid command".
The old working ipmitool version sends all messages to BMC (i.e.
addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE) and it shows correct
thresholds + event states.
Why was the code changed? CVS log message says "Bernard Manjou 6/10/08
patch to include I2c address and LUN so sensors are correctly managed;
updated by BM for v1.8.10", but I have not found much details on the
mailing list. Is the described behavior caused by Dell 1855 weirdness or
is the ipmitool code wrong? I admit I got lost in IPMI 2.0 specification :)
Jan
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