[Bug 1096002] Re: Multipath does not work with EMC 5300 Storage

[James Page]

Reassigning to the Linux package as that's where this driver resides
(libiscsi is a pure userspace implementation of the iSCSI client
protocol).

** Package changed: libiscsi (Ubuntu) => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/1096002

Title:
  Multipath does not work with EMC 5300 Storage

Status in linux package in Ubuntu:
  New

Bug description:
  Hi, 
  I setup one host installed Ubuntu 12.04 with kernel version 3.2.0.I connect the host with EMC Stroage of 5300 with FC directly.
  I wanted use the feature of multipath, but it does not work. 

  The log is as below:

  the syslog is : 
  Jan  4 15:32:29 cvknode133 kernel: [14788.818398] device-mapper: table: 252:2: multipath: error getting device
  Jan  4 15:32:29 cvknode133 kernel: [14788.826062] device-mapper: ioctl: error adding target to table
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 kernel: [14788.828229] device-mapper: table: 252:2: multipath: error getting device
  Jan  4 15:32:29 cvknode133 kernel: [14788.835525] device-mapper: ioctl: error adding target to table
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 kernel: [14788.839135] device-mapper: table: 252:2: multipath: error getting device
  Jan  4 15:32:29 cvknode133 kernel: [14788.846118] device-mapper: ioctl: error adding target to table
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 kernel: [14788.849331] device-mapper: table: 252:2: multipath: error getting device
  Jan  4 15:32:29 cvknode133 kernel: [14788.855998] device-mapper: ioctl: error adding target to table
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 udevd[19111]: inotify_add_watch(6, /dev/dm-2, 10) failed: No such file or directory
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 kernel: [14788.859838] sd 0:0:0:16385: emc: Invalid information section length 128
  Jan  4 15:32:29 cvknode133 kernel: [14788.859842] sd 0:0:0:16385: emc: detected Clariion FC (Legacy), flags 1
  Jan  4 15:32:29 cvknode133 kernel: [14788.859939] sd 0:0:0:16385: emc: Invalid failover mode 2
  Jan  4 15:32:29 cvknode133 kernel: [14788.859942] sd 0:0:0:16385: emc: not attached
  Jan  4 15:32:29 cvknode133 kernel: [14788.866610] device-mapper: table: 252:2: multipath: error attaching hardware handler
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 kernel: [14788.879802] device-mapper: ioctl: error adding target to table
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 kernel: [14788.882923] sd 0:0:0:16385: emc: Invalid information section length 128
  Jan  4 15:32:29 cvknode133 kernel: [14788.882928] sd 0:0:0:16385: emc: detected Clariion FC (Legacy), flags 1
  Jan  4 15:32:29 cvknode133 kernel: [14788.883019] sd 0:0:0:16385: emc: Invalid failover mode 2
  Jan  4 15:32:29 cvknode133 kernel: [14788.883022] sd 0:0:0:16385: emc: not attached
  Jan  4 15:32:29 cvknode133 kernel: [14788.889542] device-mapper: table: 252:2: multipath: error attaching hardware handler
  Jan  4 15:32:29 cvknode133 kernel: [14788.903347] device-mapper: ioctl: error adding target to table
  Jan  4 15:32:29 cvknode133 udevd[19111]: inotify_add_watch(6, /dev/dm-2, 10) failed: No such file or directory
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove
  Jan  4 15:32:29 cvknode133 udevd[19111]: inotify_add_watch(6, /dev/dm-2, 10) failed: No such file or directory
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: remove map (uevent)
  Jan  4 15:32:29 cvknode133 multipathd: dm-2: devmap not registered, can't remove

  mutlipath -v3 informations: 
  Jan 04 15:32:29 | sda: state = 2
  Jan 04 15:32:29 | sda: checker msg is "cciss_tur checker reports path is down"
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: pgfailover = -1 (internal default)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: pgpolicy = multibus (controller setting)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: selector = round-robin 0 (controller setting)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: features = 0 (controller setting)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: hwhandler = 0 (controller setting)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: rr_weight = 1 (controller setting)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: minio = 1000 (controller setting)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: no_path_retry = 12 (controller setting)
  Jan 04 15:32:29 | pg_timeout = NONE (internal default)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: set ACT_CREATE (map does not exist)
  Jan 04 15:32:29 | 3600508b1001c685cb4641be8413d66d4: domap (0) failure for create/reload map

  
  In the kernel source code, in the function: parse_sp_model;

  I want to know the reason of that why multipath feature can not work.

  Thanks

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