[Bug 1432062] Re: multipath-tools-boot: support booting without user_friendly_names on devices with spaces in identifiers

[Mauricio Faria de Oliveira]

Test with multipath device:
==========================

# multipath
create: 0QEMU    QEMU HARDDISK   test undef QEMU    ,QEMU HARDDISK   
size=2.0G features='0' hwhandler='0' wp=undef
`-+- policy='round-robin 0' prio=1 status=undef
  `- 0:0:1:0 sdb 8:16 undef ready running

# ls -l /dev/mapper/
total 0
brw-rw---- 1 root disk 252,   1 Jan  7 10:31 0QEMU    QEMU HARDDISK   test
lrwxrwxrwx 1 root root        7 Jan  7 10:31 0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test -> ../dm-1
crw------- 1 root root  10, 236 Jan  7 09:00 control

Without patch:
-------------

# kpartx -av '/dev/mapper/0QEMU    QEMU HARDDISK   test'
device-mapper: reload ioctl on 0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test1 failed: Invalid argument
create/reload failed on 0QEMU    QEMU HARDDISK   test1
add map 0QEMU    QEMU HARDDISK   test1 (0:0): 0 4194242 linear /dev/mapper/0QEMU    QEMU HARDDISK   test 62

# ls -l /dev/mapper
total 0
brw-rw---- 1 root disk 252,   1 Jan  7 10:31 0QEMU    QEMU HARDDISK   test
lrwxrwxrwx 1 root root        7 Jan  7 10:31 0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test -> ../dm-1
crw------- 1 root root  10, 236 Jan  7 09:00 control

With patch:
----------

# kpartx -av '/dev/mapper/0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test'
add map 0QEMU    QEMU HARDDISK   test1 (252:5): 0 4194242 linear /dev/mapper/0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test 62

# ls -l /dev/mapper/
total 0
brw-rw---- 1 root disk 252,   1 Jan  7 10:31 0QEMU    QEMU HARDDISK   test
lrwxrwxrwx 1 root root        7 Jan  7 10:31 0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test -> ../dm-1
brw-rw---- 1 root disk 252,   5 Jan  7 10:32 0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test1
crw------- 1 root root  10, 236 Jan  7 09:00 control

# kpartx -dv '/dev/mapper/0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test'
del devmap : 0QEMU    QEMU HARDDISK   test1

# ls -l /dev/mapper/
total 0
brw-rw---- 1 root disk 252,   1 Jan  7 10:31 0QEMU    QEMU HARDDISK   test
lrwxrwxrwx 1 root root        7 Jan  7 10:31 0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20test -> ../dm-1
crw------- 1 root root  10, 236 Jan  7 09:00 control

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https://bugs.launchpad.net/bugs/1432062

Title:
  multipath-tools-boot: support booting without user_friendly_names on
  devices with spaces in identifiers

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