mpathpersist

[Fil <lists@internyc.net>]

Hi Christophe,

Happy New Year!

I have seen your set of patches for persistent reservation of multipath
devices and wanted to try them out. While trying this patch set I have
run into several issues. Which code base can I apply this against? Any
help would be greatly appreciated. Issues are listed below.

thanks
fil


1. I have tried applying the patch set against fedora 16 multipath-tools
srpm and it failed miserably.

2. I pulled multipath-tools from opensvc git and that patching failed
too, so I had to apply all the patches manually.

3. while testing mppersist I get following error:

mpathpersist --out --register --param-sark=123abc --prout-type=8
/dev/mapper/blah -v 4
Dec 31 00:54:29 | alias = blah
Dec 31 00:54:29 | params = 0 0 1 1 round-robin 0 2 1 8:0 1 8:16 1
Dec 31 00:54:29 | status = 2 0 0 0 1 1 A 0 2 0 8:0 A 0 8:16 A 0
Dec 31 00:54:29 | blah: disassemble map [0 0 1 1 round-robin 0 2 1 8:0 1
8:16 1 ]
Dec 31 00:54:29 | 8:0: not found in pathvec
Dec 31 00:54:29 | 8:16: not found in pathvec
Dec 31 00:54:29 | No device found for 8:0

Dec 31 00:54:29 | No device found for 8:16

Dec 31 00:54:29 | blah: disassemble status [2 0 0 0 1 1 A 0 2 0 8:0 A 0
8:16 A 0 ]
Dec 31 00:54:29 | 36001405c55fc03cd8193d491eda0d4d7: no path available
PR out: command failed

4. with all patches applied, all multipathd cli commands crash the daemon.

here are my configs:

cat /etc/multipath.conf
defaults {
	user_friendly_names	yes
	polling_interval	10
}

multipaths {
	multipath {
		wwid			36001405c55fc03cd8193d491eda0d4d7
		alias			blah
	}
}


devices {
	device {
		vendor			"QNAP"
		product			"iSCSI Storage"
		path_selector		"round-robin 0"
		path_grouping_policy	multibus
		getuid_callout          "/lib/udev/scsi_id -g -u -d /dev/%n"
		path_checker		directio
		failback		immediate
	}

}

blacklist {
        devnode "^(vd)[a-z]"
}

multipath -ll -v3
Dec 31 00:59:01 | loading /lib64/multipath/libcheckdirectio.so checker
Dec 31 00:59:01 | loading /lib64/multipath/libprioconst.so prioritizer
Dec 31 00:59:01 | loop0: device node name blacklisted
Dec 31 00:59:01 | loop1: device node name blacklisted
Dec 31 00:59:01 | loop2: device node name blacklisted
Dec 31 00:59:01 | loop3: device node name blacklisted
Dec 31 00:59:01 | loop4: device node name blacklisted
Dec 31 00:59:01 | loop5: device node name blacklisted
Dec 31 00:59:01 | loop6: device node name blacklisted
Dec 31 00:59:01 | loop7: device node name blacklisted
Dec 31 00:59:01 | vda: device node name blacklisted
Dec 31 00:59:01 | dm-0: device node name blacklisted
Dec 31 00:59:01 | dm-1: device node name blacklisted
Dec 31 00:59:01 | dm-2: device node name blacklisted
Dec 31 00:59:01 | dm-3: device node name blacklisted
Dec 31 00:59:01 | sda: not found in pathvec
Dec 31 00:59:01 | sda: mask = 0x5
Dec 31 00:59:01 | sda: dev_t = 8:0
Dec 31 00:59:01 | sda: size = 20971520
Dec 31 00:59:01 | sda: vendor = QNAP
Dec 31 00:59:01 | sda: product = iSCSI Storage
Dec 31 00:59:01 | sda: rev = 3.1
Dec 31 00:59:01 | sda: h:b:t:l = 2:0:0:0
Dec 31 00:59:01 | sda: path state = running
Dec 31 00:59:01 | sda: get_state
Dec 31 00:59:01 | sda: path checker = directio (controller setting)
Dec 31 00:59:01 | sda: checker timeout = 30000 ms (sysfs setting)
Dec 31 00:59:01 | directio: starting new request
Dec 31 00:59:01 | directio: io finished 4096/0
Dec 31 00:59:01 | sda: state = up
Dec 31 00:59:01 | sdb: not found in pathvec
Dec 31 00:59:01 | sdb: mask = 0x5
Dec 31 00:59:01 | sdb: dev_t = 8:16
Dec 31 00:59:01 | sdb: size = 20971520
Dec 31 00:59:01 | sdb: vendor = QNAP
Dec 31 00:59:01 | sdb: product = iSCSI Storage
Dec 31 00:59:01 | sdb: rev = 3.1
Dec 31 00:59:01 | sdb: h:b:t:l = 3:0:0:0
Dec 31 00:59:01 | sdb: path state = running
Dec 31 00:59:01 | sdb: get_state
Dec 31 00:59:01 | sdb: path checker = directio (controller setting)
Dec 31 00:59:01 | sdb: checker timeout = 30000 ms (sysfs setting)
Dec 31 00:59:01 | directio: starting new request
Dec 31 00:59:01 | directio: io finished 4096/0
Dec 31 00:59:01 | sdb: state = up
Dec 31 00:59:01 | dm-4: device node name blacklisted
===== paths list =====
uuid hcil    dev dev_t pri dm_st chk_st vend/prod/rev      dev_st
     2:0:0:0 sda 8:0   -1  undef ready  QNAP,iSCSI Storage running
     3:0:0:0 sdb 8:16  -1  undef ready  QNAP,iSCSI Storage running
Dec 31 00:59:01 | params = 0 0 1 1 round-robin 0 2 1 8:0 1 8:16 1
Dec 31 00:59:01 | status = 2 0 0 0 1 1 A 0 2 0 8:0 A 0 8:16 A 0
Dec 31 00:59:01 | blah: disassemble map [0 0 1 1 round-robin 0 2 1 8:0 1
8:16 1 ]
Dec 31 00:59:01 | sda: mask = 0x8
Dec 31 00:59:01 | sda: path state = running
Dec 31 00:59:01 | sda: prio = const (internal default)
Dec 31 00:59:01 | sda: prio =  (internal default)
Dec 31 00:59:01 | sda: const prio = 1
Dec 31 00:59:01 | sdb: mask = 0x8
Dec 31 00:59:01 | sdb: path state = running
Dec 31 00:59:01 | sdb: prio = const (internal default)
Dec 31 00:59:01 | sdb: prio =  (internal default)
Dec 31 00:59:01 | sdb: const prio = 1
Dec 31 00:59:01 | blah: disassemble status [2 0 0 0 1 1 A 0 2 0 8:0 A 0
8:16 A 0 ]
blah (36001405c55fc03cd8193d491eda0d4d7) dm-4 QNAP,iSCSI Storage
size=10G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 2:0:0:0 sda 8:0  active ready running
  `- 3:0:0:0 sdb 8:16 active ready running
Dec 31 00:59:01 | directio checker refcount 2
Dec 31 00:59:01 | directio checker refcount 1
Dec 31 00:59:01 | unloading const prioritizer
Dec 31 00:59:01 | unloading directio checker