It's cleaner to handle all compression types and load functions in the
same style.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
We're about to reference it in comp_types with next commit.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
This commit cleans up the indentation and the error path of the
function. It bears no functional changes.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
[ Move assert to avoid warning with -Wdeclaration-after-statement ]
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Since all the compression magic is always available now, we don't need
to loop at runtime nor use alloca - latter of which comes with a handful
of caveats.
Simply throw in a few assert_cc(), which will trigger at build-time.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Currently, when built w/o given compression we'll incorrectly report a
"compression_none".
As we reach do_finit_module(), we'll naively assume that the kernel can
handle the compressed module, yet omit the MODULE_INIT_COMPRESSED_FILE
flag.
As result the kernel will barf at us, do_finit_module will fail with non
-ENOSYS and we won't end in the do_init_module codepath (which will also
fail).
In other words: with this change, you can build kmod without zstd, xz
and zlib support and the kernel will load the modules, assuming it
supports the format \o/
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
When dealing with an elf, we don't know or care about loading the file.
The kmod_elf subsystem/API will deal with the required parts itself.
Which in this case, already calls kmod_file_load_contents() as
applicable.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Propagate any errors during decompression further up the call stack.
Without this we could easily pass NULL as mem to init_module(2).
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
With the previous commits, we removed the need for a distinct unload
callback.
So nuke the struct all together and only use/keep the load one around.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
On mmap failure file->memory is set to -1, which we'll happily pass down
to munmap later on.
More importantly, since we do a NULL check in kmod_file_load_contents()
we will exit the function without (re)attempting the load again.
Since we ignore the return code for the load function(s), one can end up
calling kmod_elf_get_memory() and feed that -1 into init_module.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
These are used to protect a free(file->memory), within their respective
unload functions. Where the sole caller of the unload function already
does a NULL check prior.
Even so, free(NULL) is guaranteed to be safe by the standard.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
There is no need to keep the root gzFile context open for the whole
duration. Once we've copied the decompressed module to file->memory we
can close the handle.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
The gzdopen() API used, takes ownership of the fd. To make that more
explicit we clear it (-1) as applicable.
Yet again, kmod has explicit API to return the fd to the user - which
currently is used solely when uncompressed, so we're safe.
Regardless - simply duplicate the fd locally and use that with zlib.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
build/ and build-*/ are commonly used to have multiple out-out-tree
builds. Add them to gitignore.
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
The data in this file isn't related to installed libraries, so put it in
an abi-neutral location.
pkg.m4 provides macros that also allow the user to override the location
with configure switches.
Bug: https://bugs.gentoo.org/926431
Signed-off-by: Mike Gilbert <floppym@gentoo.org>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Before commit e98cef6f3f ("make: install/uninstall tools symlinks to
kmod") it was possible to call `make install DESTDIR=<dir>` multiple
times. Use `ln -sf` so the symlink is always re-created.
It would be preferred to remove install in an empty dir, but there's
not a bad consequence of re-using the same, so let the user decide.
Fixes the following errors while installing for the second time:
ln: failed to create symbolic link '/tmp/inst/usr/bin/insmod': File exists
ln: failed to create symbolic link '/tmp/inst/usr/bin/lsmod': File exists
ln: failed to create symbolic link '/tmp/inst/usr/bin/rmmod': File exists
ln: failed to create symbolic link '/tmp/inst/usr/bin/depmod': File exists
ln: failed to create symbolic link '/tmp/inst/usr/bin/modprobe': File exists
ln: failed to create symbolic link '/tmp/inst/usr/bin/modinfo': File exists
make[3]: *** [Makefile:2679: install-exec-hook] Error 1
make[2]: *** [Makefile:2553: install-exec-am] Error 2
make[1]: *** [Makefile:2439: install-am] Error 2
make: *** [Makefile:1848: install-recursive] Error 1
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Closes: https://github.com/kmod-project/kmod/issues/35
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://lore.kernel.org/r/20240306145804.135709-1-lucas.de.marchi@gmail.com
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
The kmod insert/remove tools were introduced back in 2015. Since then
they have recieved zero attention, unlike the insmod/rmmod variants.
Glancing around - neither of the following distributions (Arch, Fedora,
Gentoo, Debian) build them, so we're safe to say they have no users.
Remove them and alongside it the --enable-experimental toggle, which no
longer controls anything.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://lore.kernel.org/r/20240212-rm-experimental-v1-1-b97ab3004ae3@gmail.com
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Currently we have a pattern rule, which effective states that two output
files are produced - %.5 and %.8. Although that's not the case in
practise, since each input xml will be generated to a single manual
page.
Add the manpage section as part of the xml filename and tweak the
pattern (match) rule, accordingly.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://lore.kernel.org/r/20240217-autoconf-manpage-warns-v1-1-e1570cfc286e@gmail.com
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Currently we create symlinks like modprobe (pointing to kmod), during
the normal `make` build. Although those were never installed.
Add a few lines in the install-exec-hook, to ensure they're present at
`make install` time. Thus one can actually use those without additional
changes. As an added bonus, distributions can drop the similar hunk from
their packaging.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
[ Use a relative symlink ]
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
tools/kmod.pc is generated by build system. Any new *.pc we may have
should follow a similar approach. So, just ignore from git, like we do
for e.g. *.o.
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Python bindings are not well maintained. Currently it's just broken when
trying to build with cython 3.0.8:
make --no-print-directory all-recursive
Making all in .
CYTHON libkmod/python/kmod/kmod.c
Error compiling Cython file:
------------------------------------------------------------
...
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with python-kmod. If not, see <http://www.gnu.org/licenses/>.
cimport _libkmod_h
^
Nothing really touched those bindings for 10 years already.
I postponed the removal since they were at least building, but that just
changed. So let's drop it and allow any interested people to give it
a better life outside of libkmod.
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Now that modprobe.d is searched under ${prefix}/lib, allow a complete
transition to files only under ${prefix} by adding a ${module_directory}
configuration. This specifies the directory where to search for kernel
modules and should match the location where the kernel/distro installs
them.
With this distributions that do not want to ship files in /lib can also
move kernel modules to /usr while others can keep them in /lib.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Link: https://lore.kernel.org/r/a3765f4e8ae3ce29c0847a0132d4a8d51ad040a9.1699618135.git.msuchanek@suse.de
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Switch to using OBJ_obj2txt() to calculate and print the pkcs7
signature hash name. This eliminates the need to duplicate libcrypto
NID to name mapping, detect SM3 openssl compile-time support, and
enables using any hashes that openssl and kernel know about. For
example SHA3 are being added for v6.7 and with this patch are
automatically supported.
Signed-off-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Link: https://lore.kernel.org/r/20231029010319.157390-1-dimitri.ledkov@canonical.com
GCC 14 introduces a new -Walloc-size included in -Wextra which gives:
```
tools/depmod.c:192:14: warning: allocation of insufficient size ‘1’ for type ‘struct index_node’ with size ‘1048’ [-Walloc-size]
tools/depmod.c:255:11: warning: allocation of insufficient size ‘1’ for type ‘struct index_value’ with size ‘16’ [-Walloc-size]
tools/depmod.c:286:35: warning: allocation of insufficient size ‘1’ for type ‘struct index_node’ with size ‘1048’ [-Walloc-size]
tools/depmod.c:315:44: warning: allocation of insufficient size ‘1’ for type ‘struct index_node’ with size ‘1048’ [-Walloc-size]
```
The calloc prototype is:
```
void *calloc(size_t nmemb, size_t size);
```
So, just swap the number of members and size arguments to match the prototype, as
we're initialising 1 struct of size `sizeof(struct ...)`. GCC then sees we're not
doing anything wrong.
Signed-off-by: Sam James <sam@gentoo.org>
Show distconfdir (where system configuration files are searched/to be
installed), sysconfdir (where user configuration files are searched),
module compressions, and module signatures supported.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Link: https://lore.kernel.org/r/468b3f572d3b84f25bb53ec8fcb15ed4871914d4.1689681454.git.msuchanek@suse.de
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
There is an ongoing effort to limit use of files outside of /usr (or
${prefix} on general). Currently all modprobe.d paths are hardcoded to
outside of $prefix. Teach kmod to load modprobe.d from ${prefix}/lib.
On some distributions /usr/lib and /lib are the same directory because
of a compatibility symlink, and it is possible to craft configuration
files with sideeffects that would behave differently when loaded twice.
However, the override semantic ensures that one 'overrides' the other,
and only one configuration file of the same name is loaded from any of
the search directories.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Link: https://lore.kernel.org/r/a290343ce32e2a3c25b134e4f27c13b26e06c9e0.1689681454.git.msuchanek@suse.de
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
The symbol was somewhat recently introduced by the kernel and not all
distributions may be have available.
The number is part of the ABI, so we can add a local fallback define.
Closes: https://github.com/kmod-project/kmod/issues/29
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
When creating the context, read /sys/kernel/compression to check what's
the compression type supported by the kernel. This will later be used
when loading modules to check if the decompression step has to happen in
userspace or if it can be delegated to the kernel.
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Do not only set the type as direct, but also keep track of the
compression being used. This will allow using the in-kernel compression
in future.
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Extract 2 functions to handle finit_module vs init_modules differences,
with a fallback from the former to the latter.
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Add a separate function to load the file contents when it's needed.
When it's not needed on the path of loading modules via finit_module(),
there is no need to mmap the file. This will help support loading
modules with the in-kernel compression support.
This is done differently than the lazy initialization for
kmod_file_get_elf() because on the contents case there is also the
file->size to be updated. It would be a weird API to return the pointer
and have the size changed as a side-effect.
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Fix the following warning reported by UBSan (as of gcc-13.1.1):
shared/hash.c:244:35: runtime error: null pointer passed as
argument 2, which is declared to never be null
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
[ reshuffle the code to use return-early style ]
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
An attempt to pass too long module name to, say, rmmod, may
cause an out-of-bounds memory access (as repoted by UBSan):
$ rmmod $(for i in $(seq 0 4200); do echo -ne x; done)
libkmod/libkmod-module.c:1828:8: runtime error: index 4107 out of bounds for type 'char [4096]'
This is because 'snprintf(path, sizeof(path), ...)' may return the
value which exceeds 'sizeof(path)' (which happens when an output
gets truncated). To play it safe, such a suspicious output is
better to be rejected explicitly.
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Link: https://lore.kernel.org/r/20230519074638.402045-1-dmantipov@yandex.ru
When the module is definitely present but CONFIG_MODVERSIONS is
disabled, the following error message may be somewhat confusing:
modprobe --dump-modversions /path/to/module.ko.xz
modprobe: FATAL: could not get modversions of /path/to/module.ko.xz: No such file or directory
Choosing among the convenient errno values, I would suggest to use
ENODATA when the module lacks a particular ELF section (and vermagic
as well). So now it is expected to be:
modprobe: FATAL: could not get modversions of /path/to/module.ko.xz: No data available
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Link: https://lore.kernel.org/r/20230519093630.474185-1-dmantipov@yandex.ru
Add a missing kmod_module_unref_list() to fix a memory leak.
Fixes: 42b32d30c3 ("modprobe: Fix holders removal")
Signed-off-by: Nicolas Schier <n.schier@avm.de>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Add liblzma_LIBS to LIBS to avoid the following build failure when
building with a static-only liblzma.a:
/home/autobuild/autobuild/instance-5/output-1/host/lib/gcc/xtensa-buildroot-linux-uclibc/11.3.0/../../../../xtensa-buildroot-linux-uclibc/bin/ld: libkmod/.libs/libkmod-internal.a(libkmod-file.o):(.text.xz_uncompress+0x10): undefined reference to `lzma_code'
For consistency, also update libzstd, zlib and libcrypto
Fixes:
- http://autobuild.buildroot.org/results/83a4a7ecc77f39639d3e5bc8554bd01a62a3ede0
References: https://github.com/kmod-project/kmod/pull/25
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Replace the manual sed command, build rules and dist/clean for using
AC_CONFIG_FILES. It does the exact same thing, with an added bonus...
Currently we're missing version.py.in in the EXTRA_DIST. Thus a simple
"touch Makefile" should retrigger the regeneration of version.py. Which
would presumably fail, since the input file isn't in the distribution
tarball.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
None of the API is used outside of the compilation unit.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
It's no longer used outside the compilation unit, as of last commit.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
The last and only user was removed with commit 0246e06 ("depmod: Stop
opening modules.modinfo once per module")
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Instead of skipping tests if sysconfdir isn't /etc, just handle it
during the rootfs setup logic.
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
