Re: [PATCH blktests v2 3/3] Add tests for the SRP initiator and target drivers

[Hannes Reinecke <hare@suse.de>]

On 07/07/2018 01:15 AM, Omar Sandoval wrote:
> This might also be useful:
> 
> # /sbin/multipathd -d -s -v 3
> --------start up--------
> read /etc/multipath.conf
> loading /lib64/multipath/libchecktur.so checker
> loading /lib64/multipath/libprioconst.so prioritizer
> foreign library "nvme" loaded successfully
> set open fds limit to 1048576/1048576
> path checkers start up
> uxsock: startup listener
> No configuration dir '/etc/multipath/conf.d'
> sdb: udev property DEVLINKS whitelisted
> sdb: mask = 0x1f
> sdb: dev_t = 8:16
> sdb: size = 65536
> sdb: vendor = LIO-ORG
> sdb: product = IBLOCK
> sdb: rev = 4.0
> sdb: h:b:t:l = 1:0:0:0
> sdb: tgt_node_name =
> sdb: path state = running
> sdb: 1024 cyl, 2 heads, 32 sectors/track, start at 0
> sdb: serial = 72616d6469736b31000000000
> sdb: get_state
> sdb: detect_checker = yes (setting: multipath internal)
> failed to issue vpd inquiry for pgc9
> sdb: path_checker = tur (setting: storage device autodetected)
> sdb: checker timeout = 30 s (setting: kernel sysfs)
> sdb: tur state = up
> sdb: uid_attribute = ID_SERIAL (setting: multipath internal)
> sdb: uid = 3600140572616d6469736b31000000000 (udev)
> sdb: detect_prio = yes (setting: multipath internal)
> failed to issue vpd inquiry for pgc9
> loading /lib64/multipath/libpriosysfs.so prioritizer
> sdb: prio = sysfs (setting: storage device autodetected)
> sdb: prio args = "" (setting: storage device autodetected)
> sdb: sysfs prio = 50
> sdd: udev property DEVLINKS whitelisted
> sdd: mask = 0x1f
> sdd: dev_t = 8:48
> sdd: size = 65536
> sdd: vendor = LIO-ORG
> sdd: product = IBLOCK
> sdd: rev = 4.0
> sdd: h:b:t:l = 1:0:0:1
> sdd: tgt_node_name =
> sdd: path state = running
> sdd: 1024 cyl, 2 heads, 32 sectors/track, start at 0
> sdd: serial = 72616d6469736b32000000000
> sdd: get_state
> sdd: detect_checker = yes (setting: multipath internal)
> failed to issue vpd inquiry for pgc9
> sdd: path_checker = tur (setting: storage device autodetected)
> sdd: checker timeout = 30 s (setting: kernel sysfs)
> sdd: tur state = up
> sdd: uid_attribute = ID_SERIAL (setting: multipath internal)
> sdd: uid = 3600140572616d6469736b32000000000 (udev)
> sdd: detect_prio = yes (setting: multipath internal)
> failed to issue vpd inquiry for pgc9
> sdd: prio = sysfs (setting: storage device autodetected)
> sdd: prio args = "" (setting: storage device autodetected)
> sdd: sysfs prio = 50
> sdc: udev property DEVLINKS whitelisted
> sdc: mask = 0x1f
> sdc: dev_t = 8:32
> sdc: size = 65536
> sdc: vendor = LIO-ORG
> sdc: product = IBLOCK
> sdc: rev = 4.0
> sdc: h:b:t:l = 1:0:0:2
> sdc: tgt_node_name =
> sdc: path state = running
> sdc: 1024 cyl, 2 heads, 32 sectors/track, start at 0
> sdc: serial = 7363736964626700000000000
> sdc: get_state
> sdc: detect_checker = yes (setting: multipath internal)
> failed to issue vpd inquiry for pgc9
> sdc: path_checker = tur (setting: storage device autodetected)
> sdc: checker timeout = 30 s (setting: kernel sysfs)
> sdc: tur state = up
> sdc: uid_attribute = ID_SERIAL (setting: multipath internal)
> sdc: uid = 360014057363736964626700000000000 (udev)
> sdc: detect_prio = yes (setting: multipath internal)
> failed to issue vpd inquiry for pgc9
> sdc: prio = sysfs (setting: storage device autodetected)
> sdc: prio args = "" (setting: storage device autodetected)
> sdc: sysfs prio = 50
> nvme0n1: udev property DEVLINKS whitelisted
> nvme0n1: device node name whitelisted
> nvme0n1: mask = 0x1f
> nvme0n1: dev_t = 259:0
> nvme0n1: size = 16777216
> nvme0n1: vendor = NVME
> nvme0n1: product = QEMU NVMe Ctrl
> nvme0n1: serial = 1337
> nvme0n1: rev = 1.0
> nvme0n1: path state = live
> nvme0n1: 8192 cyl, 64 heads, 32 sectors/track, start at 0
> nvme0n1: get_state
> nvme0n1: detect_checker = yes (setting: multipath internal)
> nvme0n1: path_checker = none (setting: storage device configuration)
> nvme0n1: checker timeout = 30 s (setting: multipath internal)
> nvme0n1: none state = up
> nvme0n1: uid_attribute = ID_WWN (setting: storage device configuration)
> nvme0n1: uid = nvme.8086-31333337-51454d55204e564d65204374726c-00000001
> (udev)
> nvme0n1: detect_prio = yes (setting: multipath internal)
> nvme0n1: prio = const (setting: multipath internal)
> nvme0n1: prio args = "" (setting: multipath internal)
> nvme0n1: const prio = 1
> vda: udev property DEVLINKS whitelisted
> vda: device node name blacklisted
> vdb: udev property DEVLINKS whitelisted
> vdb: device node name blacklisted
> vdc: udev property DEVLINKS whitelisted
> vdc: device node name blacklisted
> vdd: udev property DEVLINKS whitelisted
> vdd: device node name blacklisted
> sda: udev property DEVLINKS whitelisted
> sda: mask = 0x1f
> sda: dev_t = 8:0
> sda: size = 65536
> sda: vendor = Linux
> sda: product = scsi_debug
> sda: rev = 0188
> sda: h:b:t:l = 0:0:0:0
> sda: tgt_node_name =
> sda: path state = running
> sda: 1024 cyl, 2 heads, 32 sectors/track, start at 0
> sda: serial = 2000
> sda: get_state
> sda: detect_checker = yes (setting: multipath internal)
> failed to issue vpd inquiry for pgc9
> sda: path_checker = tur (setting: multipath internal)
> sda: checker timeout = 30 s (setting: kernel sysfs)
> sda: tur state = up
> sda: uid_attribute = ID_SERIAL (setting: multipath internal)
> sda: uid = 333333330000007d0 (udev)
> sda: detect_prio = yes (setting: multipath internal)
> sda: prio = const (setting: multipath internal)
> sda: prio args = "" (setting: multipath internal)
> sda: const prio = 1
> ram0: udev property DEVNAME whitelisted
> ram0: device node name blacklisted
> ram1: udev property DEVNAME whitelisted
> ram1: device node name blacklisted
> ram2: udev property DEVNAME whitelisted
> ram2: device node name blacklisted
> sdb: udev property DEVLINKS whitelisted
> sdd: udev property DEVLINKS whitelisted
> sdc: udev property DEVLINKS whitelisted
> nvme0n1: udev property DEVLINKS whitelisted
> sda: udev property DEVLINKS whitelisted
> sda: (Linux:scsi_debug) vendor/product blacklisted
> tur checker refcount 4
> const prioritizer refcount 2
> libdevmapper version 1.02.146 (2017-12-18)
> DM multipath kernel driver v1.13.0
> sdb: udev property DEVLINKS whitelisted
> wwid 3600140572616d6469736b31000000000 not in wwids file, skipping sdb
> sdb: orphan path, only one path
> sysfs prioritizer refcount 3
> tur checker refcount 3
> sdd: udev property DEVLINKS whitelisted
> wwid 3600140572616d6469736b32000000000 not in wwids file, skipping sdd
> sdd: orphan path, only one path
> sysfs prioritizer refcount 2
> tur checker refcount 2
> sdc: udev property DEVLINKS whitelisted
> wwid 360014057363736964626700000000000 not in wwids file, skipping sdc
> sdc: orphan path, only one path
> sysfs prioritizer refcount 1
> tur checker refcount 1
> nvme0n1: udev property DEVLINKS whitelisted
> wwid nvme.8086-31333337-51454d55204e564d65204374726c-00000001 not in
> wwids file, skipping nvme0n1
> nvme0n1: orphan path, only one path
> const prioritizer refcount 1
> none checker refcount 1
> exit (signal)
> ^CReleasing uevent_monitor() resources
> Releasing uevent_listen() resources
> unloading none checker
> unloading tur checker
> unloading sysfs prioritizer
> unloading const prioritizer
> unlink pidfile
> --------shut down-------
> 
Weelll ... that's to be expected.
You are running with RH-style defaults, which won't be starting multipath if
a) only one path is set
and
b) if it's not registered in the wwids file

You can switch off this behaviour with the option

find_multipaths no

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@suse.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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