- Add vnode-backed swap space specification support. This is enabled when

  device names "md" or "md[0-9]*" and a "file" option are specified in
  /etc/fstab like this:

  md    none    swap    sw,file=/swap.bin       0       0

- Add GBDE/GELI encrypted swap space specification support, which
  rc.d/encswap supported.  The /etc/fstab lines are like the following:

  /dev/ada1p1.bde       none    swap    sw      0       0
  /dev/ada1p2.eli       none    swap    sw      0       0

  .eli devices accepts aalgo, ealgo, keylen, and sectorsize as options.

  swapctl(8) can understand an encrypted device in the command line
  like this:

  # swapctl -a /dev/ada2p1.bde

- "-L" flag is added to support "late" option to defer swapon until
  rc.d/mountlate runs.

- rc.d script change:

    rc.d/encswap -> removed
    rc.d/addswap -> just display a warning message if $swapfile is defined
    rc.d/swap1 -> renamed to rc.d/swap
    rc.d/swaplate -> newly added to support "late" option

These changes alleviate a race condition between device creation/removal
and swapon/swapoff.

MFC after:	1 week
Reviewed by:	wblock (manual page)

1 files changed, 17 insertions, 0 deletions

diff --git a/etc/rc.d/swap b/etc/rc.d/swap
new file mode 100755
index 0000000..4122e61
--- /dev/null
+++ b/etc/rc.d/swap
@@ -0,0 +1,17 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# PROVIDE: swap
+# REQUIRE: disks
+# KEYWORD: nojail shutdown
+
+. /etc/rc.subr
+
+name="swap"
+start_cmd='/sbin/swapon -aq'
+stop_cmd=':'
+
+load_rc_config $name
+run_rc_command "$1"