Init script fixes

* Fix regression - "OVERLAY_MOUNTS" should have been "DO_OVERLAY_MOUNTS".
* Fix update-rc.d commands in postinst.  Thanx to subzero79@GitHub.
* Fix make sure a filesystem exists before trying to mount in mount_fs()
* Fix local variable usage.
* Fix to read_mtab():
  * Strip control characters (space - \040) from /proc/mounts GLOBALY,
    not just first occurrence.
  * Don't replace unprintable characters ([/-. ]) for use in the variable
    name with underscore. No need, just remove them all together.
* Add check_boolean() to check if a user configure option is
  set ('yes', 'Yes', 'YES' or any combination there of) OR '1'.
  Anything else is considered 'unset'.
* Add a ZFS_POOL_IMPORT to the default config.
  * This is a semi colon separated list of pools to import ONLY.
  * This is intended for systems which have _a lot_ of pools (from
    a SAN for example) and it would be to many to put in the
    ZFS_POOL_EXCEPTIONS variable..
* Add a config option "ZPOOL_IMPORT_OPTS" for adding additional options
  to "zpool import".
* Add documentation and the chance of overriding the ZPOOL_CACHE
  variable in the config file.
* Remove "sort" from find_pools() and setup_snapshot_booting().
  Sometimes not available, and not really necessary.

Signed-off-by: Turbo Fredriksson <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Ned Bass <[email protected]>
Issue #3816

1 files changed, 31 insertions, 0 deletions

diff --git a/etc/init.d/zfs.in b/etc/init.d/zfs.in
index d81abfef5..eabb7e467 100644
--- a/etc/init.d/zfs.in
+++ b/etc/init.d/zfs.in
@@ -1,5 +1,8 @@
 # ZoL userland configuration.
 
+# To enable a boolean setting, set it to yes, on, true, or 1.
+# Anything else will be interpreted as unset.
+
 # Run `zfs mount -a` during system start?
 ZFS_MOUNT='yes'
 
@@ -29,6 +32,27 @@ VERBOSE_MOUNT='no'
 # is not allowed).
 DO_OVERLAY_MOUNTS='no'
 
+# Any additional option to the 'zfs import' commandline?
+# Include '-o' for each option wanted.
+# You don't need to put '-f' in here, unless you want it ALL the time.
+# Using the option 'zfsforce=1' on the grub/kernel command line will
+# do the same, but on a case-to-case basis.
+ZPOOL_IMPORT_OPTS=""
+
+# Full path to the ZFS cache file?
+# See "cachefile" in zpool(8).
+# The default is "@sysconfdir@/zfs/zpool.cache".
+#ZPOOL_CACHE="@sysconfdir@/zfs/zpool.cache"
+#
+# Setting ZPOOL_CACHE to an empty string ('') AND setting ZPOOL_IMPORT_OPTS to
+# "-c @sysconfdir@/zfs/zpool.cache" will _enforce_ the use of a cache file.
+# This is needed in some cases (extreme amounts of VDEVs, multipath etc).
+# Generally, the use of a cache file is usually not recommended on Linux
+# because it sometimes is more trouble than it's worth (laptops with external
+# devices or when/if device nodes changes names).
+#ZPOOL_IMPORT_OPTS="-c @sysconfdir@/zfs/zpool.cache"
+#ZPOOL_CACHE=""
+
 # Any additional option to the 'zfs mount' command line?
 # Include '-o' for each option wanted.
 MOUNT_EXTRA_OPTIONS=""
@@ -77,6 +101,13 @@ ZFS_INITRD_POST_MODPROBE_SLEEP='0'
 # This is a space separated list.
 #ZFS_POOL_EXCEPTIONS="test2"
 
+# List of pools to import?
+# If this variable is set, there will be NO auto-import of ANY other
+# pool. In essence, there will be no auto detection of availible pools.
+# This is a semi-colon separated list.
+# Makes the variable ZFS_POOL_EXCEPTIONS above redundant (won't be checked).
+#ZFS_POOL_IMPORT="pool1;pool2"
+
 # Optional arguments for the ZFS Event Daemon (ZED).
 # See zed(8) for more information on available options.
 #ZED_ARGS="-M"