Dear all,
Based on the comments received in the IRC this is a second patchet to add boot format
support.
Bootformat is specified as a simple string of data separated by commas and
optionally semi-colons, where:
- a comma is used to separate fields like name, uuid, mode and table (specifies
one device)
- a semi-colon is used to separate devices.
So the format will look like this:
<dev_name>,<uuid>,<flags>,<table>[,<table>+][;<dev_name>,<uuid>,<flags>,<table>[,<table>+]]+
See the following example.
To supply the new format to dmsetup (splitted in multiple lines for readibility)
$ dmsetup -v create --bootformat "lroot,,rw, \
0 2097152 linear 7:0 0,\
2097152 2097152 linear 7:1 0,\
4194304 2097152 linear 7:2 0;\
mroot,,rw,\
0 2097152 linear 7:3 0;\
kroot,,rw,\
0 2097152 linear 7:4 0"
Name: lroot
State: ACTIVE
Read Ahead: 256
Tables present: LIVE
Open count: 0
Event number: 0
Major, minor: 253, 3
Number of targets: 3
Name: mroot
State: ACTIVE
Read Ahead: 256
Tables present: LIVE
Open count: 0
Event number: 0
Major, minor: 253, 4
Number of targets: 1
Name: kroot
State: ACTIVE
Read Ahead: 256
Tables present: LIVE
Open count: 0
Event number: 0
Major, minor: 253, 5
Number of targets: 1
To ask dmsetup to display your existing devices in this format:
$ dmsetup table --bootformat lroot mroot kroot
lroot,,rw,4194304 2097152 linear 7:2 0;mroot,,rw,0 2097152 linear 7:3 0;kroot,,rw,0 2097152 linear 7:4 0;
Changes since v1 (suggested by Alasdair):
- Add support for embedded '\,' and '\;'
- Rename mode to flags
- Added a man page
- Added dmsetup-bootformat.sh test script
Enric Balletbo i Serra (3):
libdm: Add dm_find_unescaped_char to libdevmapper.
dmsetup: add support to output devices in bootformat style
dmsetup: add support to create devices when bootformat is used
libdm/.exported_symbols.Base | 3 +
libdm/libdevmapper.h | 17 +++++
libdm/libdm-string.c | 82 +++++++++++++++++++++
man/dmsetup.8_main | 77 ++++++++++++++++++--
test/shell/dmsetup-bootformat.sh | 77 ++++++++++++++++++++
tools/dmsetup.c | 149 ++++++++++++++++++++++++++++++++++++++-
6 files changed, 396 insertions(+), 9 deletions(-)
create mode 100644 test/shell/dmsetup-bootformat.sh
--
2.9.3
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