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Commit 7cac6387 authored by Charlie Jacobsen's avatar Charlie Jacobsen Committed by Vikram Narayanan

Patched modprobe (and rest of init tools suite) now in repo.

Found under tools/module-init-tools. These are not (for now)
automatically built and installed when the kernel is built.

To build and install, enter the module-init-tools directory,
and do the following:

   [ 1 ] aclocal -I m4 && automake --add-missing --copy && autoconf
   [ 2 ] ./configure --prefix=/ --program-prefx=lcd-
   [ 3 ] make
   [ 4 ] (sudo) make install

This will install the patched /sbin/lcd-modprobe and /sbin/lcd-insmod,
as well as the other init tools that were left untouched. The
user mode helper will use lcd-modprobe to load the module.

The man pages won't install on emulab (since /share is read only).
You can specify a different man dir via configure if you wish.

After installation, you should then be able to successfully run a
kernel module inside of an lcd, via lcd_create_as_module.

The only changes to init tools are in modprobe.c and insmod.c; only
the changes in modprobe.c are of interest (lcd-insmod is not currently
used/needed). Instead of doing the Linux init_module system call,
lcd-modprobe does an ioctl call to the LCD driver (hence, the LCD driver
must be loaded), with the bytes of the module, its size, and command
line options.
parent e0193fa4
# Generated by autotools
# Compiled executables
# But don't ignore the symlinks with the same names in this directory
# cscope/tags
# Generated documentation
# quilt's files
# test output
Jon Masters <>
Many thanks to:
Adam J. Richter <>
Alan Jenkins <>
Andreas Robinson <>
Jon Masters <>
Kay Sievers <>
Keegan McAllister <>
Marco d'Itri <>
Michal Marek <>
Mike Frysinger <>
Robby Workman <>
Rusty Russell <>
Tom Gundersen <>
Some BUGs, grouped by the individual utilty
NOTE: There is an official Bugzilla on Please do not
add to this file - file a bug on that website instead (one line URL):
(Or on click "New", "Other", "module-init-tools")
* BZ:
* BUG: We don't output deps correctly when calling --show-depends (-D)
* REASON: show-depends sets a variety of individual flags but there's
no easy way for handle_module->insmod to know the difference between
these options or an actual "-D", so we skip out too early if we hit
command entries when processing a module. RHEL has a temp fix that
it will re-read the environment (which does have -D set) in insmod.
module-init-tools coding standards
Patches to module-init-tools are welcome. Please note the following
design goals:
1) insmod and rmmod are designed to be as simple as possible.
2) modprobe is designed to be a swiss-army-knife, but the config file
format is designed to be as simple as possible: let the user create
complexity if they wish. Having said that, the "install" and "remove"
commands serve as examples of what we don't want to do in the future,
due to the problems they cause with identifying module dependencies.
3) module-init-tools contains a testsuite. Patches which do not pass
the testsuite get a frowny face. It's easy to run the testsuite,
as you can see below. Please do test patches before posting.
The testsuite
The testsuite is under tests/test-*: one directory for each tool. To
run the testsuite, type the following from the top level directory:
To start the tests at a particular test, use that test name on the
command line, eg. "./tests/runtests". To see exactly
what the test is doing, use -vv, eg
./tests/runtests -vv
To only test a given endianess or bitness, use
TEST_ENDIAN=32 TEST_BITS=le ./tests/runtests
Each test is a shell script run with "-e": ie. if any command fails,
the test will fail. The path is set up with special test versions of
the utilities (and possibly valgrind wrappers), so just invoke
"modprobe" etc. as normal. Environment variables can be used to
control normally hardwired behaviour:
The result "uname" is to return. Set to 2.6.27 by default.
These cause file operations on $MODTEST_OVERRIDE1 to occur on
$MODTEST_OVERRIDE_WITH1, etc. The numbers must be consecutive:
the code stops searching for a replacement when a number is not
found. This is used to stop the utilities looking in
/lib/modules/2.6.27/ for example.
Other environment variables can be found in testing.h.
There are various pre-compiled test modules under tests/data/. Each
one has big and little endian and 32 and 64-bit variants: modprobe
must handle both 32 and 64 bit (for x86-64, PPC64, Sparc64, IA64), and
depmod and modinfo must handle any endianness as well. If you need to
add a new module to test something, put the source under tests/src,
make sure it passes for the cases you can test, and I'll compile and
test the others.
When writing tests, make sure your test aborts on any unexpected
behaviour: eg. compare the result is equal to what you expect, rather
than not equal to something.
Rusty and Jon.
This diff is collapsed.
This diff is collapsed.
Frequently Asked Module User Questions
Q) Where should I report bugs?
A) Please post to the mailing list, along with
a description of how to reproduce. Copy Jon Masters <>.
Q) I get "/usr/bin/ld: cannot find -lc"
A) You need to install a development package which contains libc.a.
For example, on Fedora systems, you would type "yum install glibc-static".
Q) I'm having trouble inserting out-of-tree modules
A) See kernel source tree documentation: Documentation/kbuild/modules.txt
Notes for Hackers
Here are some quick notes, that may or may not evolve into something more
substantial over time. Development is preferably done via git merges.
* git trees don't contain pre-built config/Makefiles/etc. You'll need to
run the following (in order):
aclocal -I m4
automake --add-missing --copy
You can also run "autoreconf -i" to perform these three stages.
* Regression tests can be run as follows (try --help for more details):
* Documentation is in SGML source in doc/ so don't edit *.8, *.5 directly.
Prior to a new release:
Update with new version
commit git tree to appropriate branch (dev/master/topic)
perform a final tests/runtests on the tree
push tree up to
prep tree for tarball (git archive)
sign tree with GPG and save signature
push archive up to
Jon Masters <>
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insmod_SOURCES = insmod.c testing.h
lsmod_SOURCES = lsmod.c testing.h
modprobe_SOURCES = modprobe.c zlibsupport.c zlibsupport.h testing.h
rmmod_SOURCES = rmmod.c testing.h
depmod_SOURCES = depmod.c zlibsupport.c tables.c \
zlibsupport.h tables.h testing.h
modinfo_SOURCES = modinfo.c zlibsupport.c zlibsupport.h testing.h
modindex_SOURCES = modindex.c zlibsupport.c zlibsupport.h testing.h
insmod_static_SOURCES = insmod.c
insmod_static_LDFLAGS = -static
# We don't want the $(zlib_flags) here: that makes a dynamic executable
insmod_static_LDADD = libmodtools.a
EXTRA_modprobe_SOURCES =
EXTRA_insmod_static_SOURCES =
libmodtools_a_SOURCES = util.c logging.c index.c config_filter.c elfops.c \
util.h depmod.h logging.h index.h list.h config_filter.h elfops.h
libmodtools_a_CFLAGS = -ffunction-sections
EXTRA_libmodtools_a_SOURCES = elfops_core.c
insmod_LDADD = $(LDADD) libmodtools.a
lsmod_LDADD = $(LDADD) libmodtools.a
modprobe_LDADD = $(LDADD) libmodtools.a
rmmod_LDADD = $(LDADD) libmodtools.a
depmod_LDADD = $(LDADD) libmodtools.a
modinfo_LDADD = $(LDADD) libmodtools.a
modindex_LDADD = $(LDADD) libmodtools.a
MAN5 = depmod.conf.5 depmod.d.5 modprobe.conf.5 modprobe.d.5 \
modules.dep.5 modules.dep.bin.5
MAN8 = depmod.8 insmod.8 lsmod.8 rmmod.8 modprobe.8 modinfo.8
SGML = $(addprefix doc/, $(MAN5:%.5=%.sgml) $(MAN8:%.8=%.sgml))
dist_man_MANS = $(MAN5) $(MAN8)
# If they haven't overridden mandir, fix it (never /man!)
mandir =$(shell if [ @mandir@ = $(prefix)/man ]; then if [ $(prefix) = / ]; then echo /usr/share/man; else echo $(prefix)/share/man; fi; else echo @mandir@; fi)
TESTSUITE := $(shell test -e @srcdir@/tests && find @srcdir@/tests -type f ! -name '*~')
EXTRA_DIST = generate-modprobe.conf FAQ CODING install-with-care $(SGML) $(man_MANS) $(TESTSUITE)
sbin_PROGRAMS = insmod modprobe rmmod depmod modinfo
sbin_PROGRAMS += insmod.static
bin_PROGRAMS = lsmod
noinst_LIBRARIES = libmodtools.a
INSTALL = $(SHELL) $(top_srcdir)/install-with-care
DIST_DIR := /data/work/releases/module-init-tools/
# docbook2man writes file itself, doesn't do stdout.
%.8: doc/%.sgml
if [ "$(DOCBOOKTOMAN)" = "docbook2man" ]; then \
$(DOCBOOKTOMAN) $< > /dev/null 2>&1; \
else \
$(DOCBOOKTOMAN) $< 2>&1 > $@ | sed 's/^[^:]*://'; \
%.5: doc/%.sgml
if [ -h $< ]; then \
ln -s $$(basename $$(readlink $<) .sgml).5 $@; \
elif [ "$(DOCBOOKTOMAN)" = "docbook2man" ]; then \
$(DOCBOOKTOMAN) $< > /dev/null 2>&1; \
else \
$(DOCBOOKTOMAN) $< 2>&1 > $@ | sed 's/^[^:]*://'; \
# docbook2man creates extra crap files which need cleaning.
distclean-local: killbuildmanpages
rm -f doc/*.tmp manpage.refs manpage.links
tarball: $(DIST_DIR)/module-init-tools-$(VERSION).tar.gz
#$(DIST_DIR)/module-init-tools-$(VERSION).tar.gz: dist
# mv module-init-tools-$(VERSION).tar.gz $@
# git based version
cd $$(git rev-parse --show-toplevel) && git archive --format=tar --prefix=module-init-tools-$(VERSION)/ v$(VERSION) | (cd $(DIST_DIR) && tar xv)
cd $(DIST_DIR)/module-init-tools-$(VERSION) && aclocal -I m4 && automake --add-missing --copy && autoconf
cd $(DIST_DIR) && tar cvfz module-init-tools-$(VERSION).tar.gz module-init-tools-$(VERSION)
mkdir -p $(DIST_DIR)/.pushed
ln -s $(DIST_DIR)/module-init-tools-$(VERSION).tar.gz $(DIST_DIR)/.pushed/module-init-tools-$(VERSION).tar.gz
gpg-tarball: $(DIST_DIR)/module-init-tools-$(VERSION).tar.gz.sign
mkdir -p $(DIST_DIR)/.pushed
ln -s $(DIST_DIR)/module-init-tools-$(VERSION).tar.gz.sign $(DIST_DIR)/.pushed/module-init-tools-$(VERSION).tar.gz.sign
$(DIST_DIR)/module-init-tools-$(VERSION).tar.gz.sign: tarball
cd $(DIST_DIR) && gpg -a -b -s -o module-init-tools-$(VERSION).tar.gz.sign module-init-tools-$(VERSION).tar.gz
srpm: $(DIST_DIR)/module-init-tools-$(VERSION).tar.gz
ln -sf $(DIST_DIR)/module-init-tools-$(VERSION).tar.gz /usr/src/rpm/SOURCES/
set -e; RELEASE=`grep '^Release:' /usr/src/rpm/SPECS/modutils.spec | awk '{ print $$2 }'`; \
if [ "`grep '%define mit_ver' /usr/src/rpm/SPECS/modutils.spec | awk '{print $$3}'`" != $(VERSION) ]; then \
sed -e "s/Release: $$RELEASE/Release: `expr $$RELEASE + 1`/" -e 's/%define mit_ver.*/%define mit_ver $(VERSION)/' < /usr/src/rpm/SPECS/modutils.spec > /tmp/modutils.spec; \
rpm -ba /tmp/modutils.spec; \
mv /usr/src/rpm/SRPMS/modutils-2.4.21-`expr $$RELEASE + 1`.src.rpm $(DIST_DIR); \
mv /tmp/modutils.spec /usr/src/rpm/SPECS/modutils.spec; \
else \
rpm -ba /usr/src/rpm/SPECS/modutils.spec; \
mv /usr/src/rpm/SRPMS/modutils-2.4.21-$$RELEASE.src.rpm $(DIST_DIR); \