On Fri, 14 May 2010 20:41:41 -0500 Will Drewry wrote: > Add a dm= kernel parameter modeled after the md= parameter from > do_mounts_md. It allows for device-mapper targets to be configured at > boot time for use early in the boot process (as the root device or > otherwise). dm=<blah> documentation needs to be added to Documentation/kernel-parameters.txt and/or Documentation/md.txt. > The format is dm="name uuid ro,table line 1,table line 2,...". The > parser expects the comma to be safe to use as a newline substitute but, > otherwise, uses the normal separator of space. Some attempt has been > made to make it forgiving of additional spaces (using skip_spaces()). This "space in the arg string" has been tested, right? It seems a bit odd to me. Most kernel parameter strings that I am familiar with use punctuation for separating parameter parts. > A mapped device created during boot will be assigned a minor of 0 and > may be access via /dev/dm-0. > > An example dm-linear root with no uuid may look like: > > root=/dev/dm-0 dm="lroot none 0, 0 4096 linear 98:16 0, 4096 4096 linear 98:32 0" > > Once udev is started, /dev/dm-0 will become /dev/mapper/lroot. > > Signed-off-by: Will Drewry <wad@xxxxxxxxxxxx> > --- > init/Makefile | 1 + > init/do_mounts.c | 1 + > init/do_mounts.h | 10 ++ > init/do_mounts_dm.c | 353 +++++++++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 365 insertions(+), 0 deletions(-) > create mode 100644 init/do_mounts_dm.c --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
