A collection of dracut fixes

- In older systems without sysroot.mount, import before dracut-mount,
  and re-enable old dracut mount hook
- rootflags MUST be present even if the administrator neglected to
  specify it explicitly
- Check that mount.zfs exists in sbindir
- Remove awk and head as (now unused) requirements, add grep, and
  install the right mount.zfs
- Eliminate one use of grep in Dracut
- Use a more accurate grepping statement to identify zfsutil in rootflags
- Ensure that pooldev is nonempty
- Properly handle /dev/sd* devices and more
- Use new -P to get list of zpool devices
- Bail out of the generator when zfs:AUTO is on the root command line
- Ignore errors from systemctl trying to load sysroot.mount, we only
  care about the output
- Determine which one is the correct initqueuedir at run time.
- Add a compatibility getargbool for our detection / setup script.
- Update dracut .gitignore files

Signed-off-by: <Matthew Thode [email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #4558
Closes #4562

2 files changed, 12 insertions, 8 deletions

diff --git a/contrib/dracut/02zfsexpandknowledge/.gitignore b/contrib/dracut/02zfsexpandknowledge/.gitignore
new file mode 100644
index 000000000..7fb6b964f
--- /dev/null
+++ b/contrib/dracut/02zfsexpandknowledge/.gitignore
@@ -0,0 +1 @@
+module-setup.sh
diff --git a/contrib/dracut/02zfsexpandknowledge/module-setup.sh.in b/contrib/dracut/02zfsexpandknowledge/module-setup.sh.in
index 830ee42f6..e694ae0d0 100755
--- a/contrib/dracut/02zfsexpandknowledge/module-setup.sh.in
+++ b/contrib/dracut/02zfsexpandknowledge/module-setup.sh.in
@@ -15,21 +15,24 @@ get_pool_devices() {
   local poolconfigoutput
   local pooldev
   local prefix
+  local resolved
   poolconfigtemp=`mktemp`
-  @sbindir@/zpool list -v -H "$1" > "$poolconfigtemp" 2>&1
+  @sbindir@/zpool list -v -H -P "$1" > "$poolconfigtemp" 2>&1
   if [ "$?" != "0" ] ; then
     poolconfigoutput=$(cat "$poolconfigtemp")
     dinfo "zfsexpandknowledge: pool $1 cannot be listed: $poolconfigoutput"
   else
     while read pooldev ; do
-      for prefix in /dev/disk/* /dev/mapper ; do
-        if [ -e "$prefix"/"$pooldev" ] ; then
-          dinfo "zfsexpandknowledge: pool $1 has device $prefix/$pooldev"
-          echo `readlink -f "$prefix"/"$pooldev"`
-          break
+        if [ -n "$pooldev" -a -e "$pooldev" ] ; then
+          if [ -h "$pooldev" ] ; then
+              resolved=`readlink -f "$pooldev"`
+          else
+              resolved="$pooldev"
+          fi
+          dinfo "zfsexpandknowledge: pool $1 has device $pooldev (which resolves to $resolved)"
+          echo "$resolved"
         fi
-      done
-    done < <(cat "$poolconfigtemp" | awk -F '\t' 'NR>1 { print $2 }')
+    done < <(cat "$poolconfigtemp" |  awk -F '\t' '/\t\/dev/ { print $2 }')
   fi
   rm -f "$poolconfigtemp"
 }