[dm-devel] dmsetup create linear with 4 devices not possible?

[Sverd Johnsen]

[40309.478954] device-mapper: table: 254:15: linear: Invalid argument count

root at bar /tmp # vgchange -ay looptest
    Logging initialised at Mon Aug 20 11:00:05 2018
    Activating logical volume looptest/testing.
    activation/volume_list configuration setting not defined: Checking
only host tags for looptest/testing.
    Creating looptest-testing
    Loading table for looptest-testing (254:15).
    Resuming looptest-testing (254:15).
    Activated 1 logical volumes in volume group looptest
  1 logical volume(s) in volume group "looptest" now active

root at bar /tmp # dmsetup table /dev/mapper/looptest-testing
0 2088960 linear 7:0 2048
2088960 2088960 linear 7:1 2048
4177920 2088960 linear 7:2 2048
6266880 2088960 linear 7:3 2048

root at bar /tmp # dmsetup table /dev/mapper/looptest-testing > test.table

root at bar /tmp # vgchange -an looptest
    Logging initialised at Mon Aug 20 11:00:18 2018
    Deactivating logical volume looptest/testing.
    Removing looptest-testing (254:15)
    Deactivated 1 logical volumes in volume group looptest
  0 logical volume(s) in volume group "looptest" now active

root at bar /tmp # dmsetup create test --table test.table
Invalid format on line 1 of table .
Command failed.

root at bar /tmp # dmsetup create test --table "$(cat test.table)"
device-mapper: reload ioctl on test  failed: Invalid argument
Command failed.

root at bar /tmp # dmesg | tac | head -n2
[40309.478958] device-mapper: ioctl: error adding target to table
[40309.478954] device-mapper: table: 254:15: linear: Invalid argument count

root at bar /tmp # cat test.table
0 2088960 linear 7:0 2048
2088960 2088960 linear 7:1 2048
4177920 2088960 linear 7:2 2048
6266880 2088960 linear 7:3 2048