wic: Introduce --fsuuid and have --use-uuid make use of UUID too

First, allow for wic to be given a filesystem UUID to be used when
creating a filesystem.  When not provided, wic will generate the UUID to
be used.  Next, when --use-uuid is passed, we update the fstab to mount
things via UUID (and if not found, then use PARTUUID) as UUID is more
portable.

(From OE-Core rev: 9256b8799495634ee8aee5d16ff71bd6e6e25ed4)

Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/scripts/lib/wic/help.py b/scripts/lib/wic/help.py
index 2ac45e052e..bf658b94e3 100644
--- a/scripts/lib/wic/help.py
+++ b/scripts/lib/wic/help.py
@@ -863,7 +863,10 @@ DESCRIPTION
        This is achieved by wic adding entries to the fstab during image
        generation. In order for a valid fstab to be generated one of the
        --ondrive, --ondisk or --use-uuid partition options must be used for
-       each partition that specifies a mountpoint.
+       each partition that specifies a mountpoint.  Note that with --use-uuid
+       and non-root <mountpoint>, including swap, the mount program must
+       understand the PARTUUID syntax.  This currently excludes the busybox
+       versions of these applications.
 
 
        The following are supported 'part' options:
@@ -986,6 +989,11 @@ DESCRIPTION
                  in bootloader configuration before running wic. In this case .wks file can
                  be generated or modified to set preconfigured parition UUID using this option.
 
+         --fsuuid: This option is specific to wic. It specifies filesystem UUID.
+                   It's useful if preconfigured filesystem UUID is added to kernel command line
+                   in bootloader configuration before running wic. In this case .wks file can
+                   be generated or modified to set preconfigured filesystem UUID using this option.
+
          --system-id: This option is specific to wic. It specifies partition system id. It's useful
                       for the harware that requires non-default partition system ids. The parameter
                       in one byte long hex number either with 0x prefix or without it.