From 2957f38d78d376431ab18d2f576099d682d7a711 Mon Sep 17 00:00:00 2001 From: Ned Bass <bass6@llnl.gov> Date: Thu, 29 Nov 2012 11:08:37 -0800 Subject: vdev_id support for device link aliases Add a vdev_id feature to map device names based on already defined udev device links. To increase the odds that vdev_id will run after the rules it depends on, increase the vdev.rules rule number from 60 to 69. With this change, vdev_id now provides functionality analogous to zpool_id and zpool_layout, paving the way to retire those tools. A defined alias takes precedence over a topology-derived name, but the two naming methods can otherwise coexist. For example, one might name drives in a JBOD with the sas_direct topology while naming an internal L2ARC device with an alias. For example, the following lines in vdev_id.conf will result in the creation of links /dev/disk/by-vdev/{d1,d2}, each pointing to the same target as the device link specified in the third field. # by-vdev # name fully qualified or base name of device link alias d1 /dev/disk/by-id/wwn-0x5000c5002de3b9ca alias d2 wwn-0x5000c5002def789e Also perform some minor vdev_id cleanup, such as removal of the unused -s command line option. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #981 --- etc/zfs/Makefile.am | 1 + etc/zfs/vdev_id.conf.alias.example | 4 ++++ 2 files changed, 5 insertions(+) create mode 100644 etc/zfs/vdev_id.conf.alias.example (limited to 'etc/zfs') diff --git a/etc/zfs/Makefile.am b/etc/zfs/Makefile.am index b1a1cf43c..dd864f4a2 100644 --- a/etc/zfs/Makefile.am +++ b/etc/zfs/Makefile.am @@ -1,6 +1,7 @@ pkgsysconfdir = $(sysconfdir)/zfs pkgsysconf_DATA = \ + vdev_id.conf.alias.example \ vdev_id.conf.sas_direct.example \ vdev_id.conf.sas_switch.example \ vdev_id.conf.multipath.example \ diff --git a/etc/zfs/vdev_id.conf.alias.example b/etc/zfs/vdev_id.conf.alias.example new file mode 100644 index 000000000..33735b05b --- /dev/null +++ b/etc/zfs/vdev_id.conf.alias.example @@ -0,0 +1,4 @@ +# by-vdev +# name fully qualified or base name of device link +alias d1 /dev/disk/by-id/wwn-0x5000c5002de3b9ca +alias d2 wwn-0x5000c5002def789e -- cgit v1.2.3