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This information can be found in /lib/modules/`uname -r`/modules.softdep, and
has only recently been exported by the kernel.
Also remove the advice about copying modules.softdep to /lib/modules as it is
not clear how to do this correctly with several kernels installed with
potentially conflicting soft dependencies.
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Before we had softdeps, the usual idiom was
install foo /sbin/modprobe bar; /sbin/modprobe --ignore-install foo
ignoring errors from the first modprobe invocation. This also matches
the behavior of module-init-tools' implementation of softdep.
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Add --enable-python configure switch so we build the python bindings. We
also pass version.py through SED_PROCESS macro, so the version is kept
in sync with kmod.
Acked-by: Andy Grover <agrover@redhat.com>
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Acked-by: Andy Grover <agrover@redhat.com>
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This is python-kmod is found in git@github.com:agrover/kmod.git
d5b6f22639c077b86659828bcc78dcedc9daaa94
Its history has being rewritten to prepare for a merge:
- Every commit has been prefixed with "python: " in its commit
message
- s-o-b's have been removed
- Every file has been moved to libkmod/python directory
Some files don't make much sense anymore and are being removed
in this merge.
Acked-by: Andy Grover <agrover@redhat.com>
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We need Cython BEFORE installing kmod (done with setup_requires),
and AFTER installation - during runtime (done with install_requires)
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Add 'quiet' option to override.
Add docstring.
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Reported-by: Oz Nahum Tiram <nahumoz@gmail.com>
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Last update changed API slightly:
* loaded_modules renamed to modules
* returns a module object instead of (name, size)
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This brings the config file up to speed with the following
update-copyright commit:
commit 3c68a1a48419d8b2bbc2ce0e7f1700b996ec30e9
Author: W. Trevor King <wking@tremily.us>
Date: Fri Oct 19 21:52:48 2012 -0400
project: for consistency, also separate ignored paths with pipes.
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He seems to be assigning copyright of files he writes to Red Hat.
Avoiding .mailmap so the git log will still attribute changes to him.
I'm not sure which name should go in the AUTHORS file.
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Use my external update-copyright package to maintain copyright blurbs.
http://pypi.python.org/pypi/update-copyright/
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With Cython we get easier memory handling and Python 3 compatibility.
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Please FSF, never move again.
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We need to check the result of basically all Py* calls and cleanup
properly if they fail.
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Based on text from kmod's README.
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And other misc. cleanups and changes.
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move casts of pyobject -> kmodobject to the functions from the struct
init.
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With -Wstrict-aliasing=2 we get the following warning:
libkmod/libkmod-signature.c:124:20: note: in expansion of macro 'get_unaligned'
sig_len = be32toh(get_unaligned(&modsig->sig_len));
However there's nothing wrong with it. modsig->sig_len is uint32_t and
get_unaligned in this case returns uint32_t. There's notstrict aliasing
violation.
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From Jan Engelhardt:
Program received signal SIGBUS, Bus error.
[Switching to process 11100]
0x00035278 in kmod_module_signature_info (file=0x4eeb8, sig_info=0xffffc254)
at libkmod/libkmod-signature.c:124
124 sig_len = be32toh(modsig->sig_len);
(gdb) p modsig
$1 = (const struct module_signature *) 0xf7dfe143
modsig->sig_len can be unaligned if modsig is unaligned, so the padding
in the struct has no effect since we are mapping it to the mem buffer.
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Just let the warnings be emmited, but don't fail on them.
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./configure: line 14316: xyes: command not found
We are not using have_manpages, so remove it.
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Test depmod with search dirs "foo" and "foobar". Previously to 49b33c1
("depmod: do not allow partial matches with "search" directive") we were
failing this test due to matching the prefix without checking if
it's the full dir name.
We are adding 2 tests here in order to catch the case we only pass the
test due to processing the directories in a favourable order.
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Currently e.g. "search foo foobar built-in" will cause unpredictable
results if baz.ko is in both foo/ and foobar/, since "foo" in search may
match both of those directories and the preferred module therefore
depends on processing order.
Fix the code to ensure that the match is performed on full pathname
components only.
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Commit 51c409b ("Cache the offset of crc") unintentinally changed the
comparison "if (elf->class & KMOD_ELF_32)" to
"if (elf->class == KMOD_ELF_32)".
This has been reported by Serge Voilokov <serge0x76@gmail.com>:
On Raspberry PI elf->class equals KMOD_ELF_32|KMOD_ELF_LSB so
valid condition should be (elf->class & KMOD_ELF_32) instead of
(elf->class == KMOD_ELF_32).
This fixes "modprobe --dump-modversions" failing on 32b systems.
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In a specific configuration (chroot with the linux32 personality), the
modprobe_install_cmd_loop test failed, because the bash process handling
the install command segfaulted. The backtrace showed a uname() call
during libpthread initialization, at which point the environ pointer
hadn't been initialized yet:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x080c1591 in getenv (name=<optimized out>,
name@entry=0xf775f850 "TESTSUITE_UNAME_R") at getenv.c:81
81 for (i = 0, len = strlen (name); environ[i]; i++)
(gdb) bt
#0 0x080c1591 in getenv (name=<optimized out>,
name@entry=0xf775f850 "TESTSUITE_UNAME_R") at getenv.c:81
#1 0xf775f754 in uname (u=u@entry=0xff946350) at testsuite/uname.c:32
#2 0xf74ffc6c in is_smp_system ()
at ../nptl/sysdeps/unix/sysv/linux/i386/smp.h:39
#3 __pthread_initialize_minimal_internal () at nptl-init.c:460
#4 0xf74fe32c in _init () at ../sysdeps/i386/crti.S:74
#5 0x00000000 in ?? ()
(gdb) p environ
$1 = (char **) 0x0
I don't know why it only happend in the chroot, but glibc can call its
own functions and impose any restrictions before main() is started, so
we have to adapt.
Also, do not return error if there is an environment, but the
environment variable is not found. If uname() is called by kmod, then
the respective test will simply fail later. If it's something else
calling uname(), then we do not want to disturb the program.
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Nowadays udev doesn't create nodes in /dev anymore. This role is rather
taken by systemd-tmpfiles on early boot so reference it generically as
systemd.
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Same reason as found in this commit to systemd:
commit 4ca39b280fce3c60d2fdecbd478fd9bf7f9d3e64
Author: Mike Gilbert <floppym@gentoo.org>
Date: Sun Feb 23 11:21:13 2014 -0500
configure: Do not require xsltproc for installation of man pages
The release tarballs ship with pre-generated man pages, so we do not
need xsltproc for a typical end-user build.
Developers will probably have xsltproc anyway, but if not they will now
encounter a build-time failure instead of an error in configure.
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These redirecting makefiles simplifies compiling from some editors and
when CWD is not the root of the source tree. This is similar to what was
introduced in systemd in 340d89e ("build-sys: add small redirecting
Makefiles to simplify compilation from within emacs")
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In kcmdline it's possible to have a dot in the param's value. The
support for this was added in 66f3228 ("libkmod: Add support for '.' in
module parameter on kcmdline") and is needed to correctly support some
modules that depend on it.
This test was added in order to make sure the commit aa87854
("libkmod-config: Only match dot before '=' in /proc/cmdline") didn't
break it. Although that commit message says it's allowing to match a
dot before '=' it's actually enforcing the first part of the string to
be always in the format "<module-name>.param". Dots after '=' are still
correctly allowed.
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Strings unrelated to modules and modprobe should be ignored and not
appear in the output of "modprobe -c".
This adds a test for the fix provided in aa87854 ("libkmod-config: Only
match dot before '=' in /proc/cmdline").
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We are not only checking if those options are correctly parsed from
kcmdline, but if in fact they are being passed to the final
(f)init_module call. This is why we use 'modprobe --show-depends'
instead of the simpler 'modprobe -c'.
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Use "modprobe -c" to dump the configuration. Since we configure our
rootfs to have only a /proc/cmdline file, this should dump the knowledge
we have from its parsed content.
Test if <module>.option, without any value is correctly parsed, as fixed
in commit 493dc65 ("libkmod: Fix getting param with no value from kcmdline")
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Otherwise, we also parse strings like
BOOT_IMAGE=/boot/vmlinuz-3.12.12-57.g5f654cf-default
In practice, this is not a problem, because there is no module named
BOOT_IMAGE=/boot/vmlinuz-3. It just disturbs in modprobe -c output.
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If we can open it and read it, it's good enough for us. Otherwise, we
cannot use -C /dev/null to skip the system configuration for instance:
$ ./tools/modprobe -C /dev/null -c
libkmod: ERROR libkmod/libkmod-config.c:821 conf_files_list: unsupported
file mode /dev/null: 0x21b6
...
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Store the file and elf pointer in the kmod_module structure and have it
freed together with the module.
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If the test's uname -r is less that 3.8, return -ENOSYS from
finit_module(), so that the fallback is tested.
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There is no check if the correct flags are passed to finit_module, but
at least we cover the respective code path in kmod.
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Add a ->modules_loaded member to struct test, which is a comma-separated
list of modules that should be present after the test finishes. Both
missing and excess modules cause an error.
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This patch removes the cmdopts declaration and the documentation. They
were leftover from the -w removal.
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Add comma between lsmod(8) and modinfo(8)
Signed-off-by: Lukas Berk <lberk@redhat.com>
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Found by
https://raw.github.com/karelzak/util-linux/master/tools/checkincludes.pl
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Also define noreturn w/o <stdnoreturn.h> and move it to macro.h instead
of in the testsuite.
Based on similar commit on systemd by Shawn Landden
<shawn@churchofgit.com>.
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Move file so we can use the same file to test other functions from
libkmod-util.c
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This allows make rules for generated build files (i.e. configure,
Makefile.in, ... ) to be skipped. This is useful when
the source is stored without timestamps (for example in CVS or GIT).
When the build rules trigger to regenerate the build files, it tries to
use the same autotools version (currently 1.14) as was originally used
for the release. Since many of our build machines run Debian Squeeze,
they only have autotools 1.11 available and the build fails.
Currently, we have to work around this by touching all the generated
files before building to avoid triggering the make rule. With this
patch, we would be able to just run configure with
--disable-maintainer-mode instead. The patch sets the default to enable
to not change the default behavior.
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If we are note building in the existing source tree and have disabled
dependency-tracking then the testsuite directory is not created during
the configure phase and will not exist when the cp of ROOTFS_PRISTINE
occurs, thus causing an error and fail.
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The buildtest-TESTS target allows for cross-compilation of the testsuites
without the actual running of the tests that check normally does.
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Let libkmod enforce KMOD_REMOVE_NOWAIT.
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Not passsing O_NONBLOCK to delete_module() is deprecated since kmod 11
and is being removed from the kernel. Force this flag in libkmod.
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By aligning n_buckets to power of 2 we can turn the "bucket = hashval %
n_buckets" into a less expensive bucket = hashval & (n_buckets - 1).
This removes the DIV instruction as shown below.
Before:
xor %edx,%edx
divl 0x8(%rbx)
mov %edx,%eax
add $0x1,%rax
shl $0x4,%rax
add %rbx,%rax
After:
lea -0x1(%rdi),%edx
and %edx,%eax
add $0x1,%rax
shl $0x4,%rax
add %rbx,%rax
With a microbenchmark, measuring the time to locate the bucket (i.e.
time_to_calculate_hashval + time_to_calculate_bucket_position) we have
the results below (time in clock cycles):
keylen before after
2-10 79.0 61.9 (-21.65%)
11-17 81.0 64.4 (-20.48%)
18-25 90.0 73.2 (-18.69%)
26-32 104.7 87.0 (-16.82%)
33-40 108.4 89.6 (-17.37%)
41-48 111.2 91.9 (-17.38%)
49-55 120.1 102.1 (-15.04%)
56-63 134.4 115.7 (-13.91%)
As expected the gain is constant, regardless of the key length.
The time to clculate the hashval varies with the key length, which
explains the bigger gains for short keys.
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Add static inline function to align a value to it's next power of 2.
This is commonly done by a SWAR like the one in:
http://aggregate.org/MAGIC/#Next Largest Power of 2
However a microbench shows that the implementation herer is a faster.
It doesn't really impact the possible user of this function, but it's
interesting nonetheless.
Using a x86_64 i7 Ivy Bridge it shows a ~4% advantage by using clz
instead instead of the OR and SHL chain. And this is by using a BSR
since Ivy Bridge doesn't have LZCNT. New Haswell processors have the
LZCNT instruction which can make this even better. ARM also has a CLZ
instruction so it should be better, too.
Code used to test:
...
v = val[i];
t1 = get_cycles(0);
a = ALIGN_POWER2(v);
t1 = get_cycles(t1);
t2 = get_cycles(0);
v = nlpo2(v);
t2 = get_cycles(t2);
printf("%u\t%llu\t%llu\t%d\n", v, t1, t2, v == a);
...
In which val is an array of 20 random unsigned int, nlop2 is the SWAR
implementation and get_cycles uses RDTSC to measure the performance.
Averages:
ALIGN_POWER2: 30 cycles
nlop2: 31.4 cycles
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During the last merge window (3.12) a couple of modules gained devname
aliases, but without the necessary major and minor information. These were
then silently ignored when generating modules.devname.
Complain loudly to avoid such errors sneaking in undetected in the future:
depmod: ERROR: Module 'zram' has devname (zram) but lacks major and minor information. Ignoring.
depmod: ERROR: Module 'uhid' has devname (uhid) but lacks major and minor information. Ignoring.
Cc: Kay Sievers <kay@vrfy.org>
Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
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It's used in so many places without checking, that's really pointless to
check for it in macro.h.
Also remove AC_C_TYPEOF from configure.ac since we don't use -ansi.
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Commit 8efede20ef ("Use _Static_assert") introduced the usage of
_Static_assert(). However, _Static_assert() is a fairly new thing,
since it was introduced only in gcc 4.6. In order to support older
compilers, this patch adds a configure.in test that checks whether
_Static_assert() is usable or not, and adjust the behavior of the
assert_cc() macro accordingly.
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With readdir_r() we should be providing enough space to store the dir
name. This could be accomplished by define an union like systemd does:
union dirent_storage {
struct dirent de;
uint8_t storage[offsetof(struct dirent, d_name) +
((NAME_MAX + 1 + sizeof(long)) & ~(sizeof(long) - 1))];
};
However in all places that we use readdir_r() we have no concerns about
reentrance nor we have problems with threads. Thus use the simpler
readdir() instead.
We also remove the error logging here (that could be added back by
checking errno), but it was not adding much value so it's gone.
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stdout and stderr are names reserved for the implementation
and musl uses them rightfully as macro - and the expansion
causes (of course) unexpected results.
rename the struct members stdout to out and stderr
to err, to be 1) compliant 2) cause compilation to
succeed.
fixes build with musl libc.
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Currently we fail to add the module option if the parameter doesn't have
a value.
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It occurred to an openSUSE user that our mkinitrd would throw a
warning when used with kmod:
libkmod: conf_files_list: unsupported file mode /dev/null: 0x21b6
Grepping for the error message revealed that there might be a missing
"else" keyword here, since it is unusual to put an "if" directly after
closing brace.
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Based on journalctl and udevadm from systemd and adapted to kmod needs.
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Put the differences between kmod and module-init-tools in the README
file so it's more visible.
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Allows us to drop call to "mkdir -p" from the systemd service file.
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Like mkdir_p, but discards the leaf, creating the parent directories.
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In containers/VM's/initrd one might not have installed any modules and
accompanying modules.devname Don't fail if this is the case, just warn.
When used in systemd this means we don't get a failing unit on booting
containers.
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- Fix infinite loop when path is relative
- Fix not considering EEXIST as a success
- General refactor to mkdir_p so it never calls mkdir for an existing
dir (given no one creates it from outside)
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Instead of linking dynamically with libkmod, use libkmod-private.la. We
disallow creating a static libkmod because we can't hide symbols there
and it cause problems with external programs. However this should not
prevent users that are only interested in the tools we provide not being
able to ship only them keeping the library alone.
Other projects also do this to allow our tools to use certain functions
that should not be used outside of the project.
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The reason to have a kmod-nolib binary is that we need to call kmod on
test cases (or a symlink to it) and for testing things in tree. Since
we are using libtool if we are dinamically linking to libkmod what we
end up having is a shell script that (depending on the version *)
changes argv[0] to contain an "lt-" prefix. Since this screws with our
compat stuff, we had a kmod-nolib that links statically.
This all workaround works fine iff we are using one of the compat
commands, i.e. we are using the symlinks insmod, rmmod, modprobe, etc.
However if we are actually trying the kmod binary, this doesn't work
because we can't create a kmod symlink since there's already a kmod
binary.
So, completely give up on libtool fixing their mess. Now we create a
tool/test/ directory and the symlinks and kmod is put there.
* http://lists.gnu.org/archive/html/bug-libtool/2011-12/msg00023.html
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Do the same as done in systemd by Cristian RodrÃguez
<crrodriguez@opensuse.org>. We use private symbols, not namespaced. So
don't pretend we support static linking.
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Experiment with a build bot.
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At least in qemu 1.4.1 for vexpress/arm-cortexa9, this resulted in an
illegal instruction error. Solve that by returning an error when
__NR_finit_module is -1.
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This reverts commit 38829712e5c411bc250aeae142fc6bf06e794d58. It fixes
the problem, but it breaks the testsuite for those who don't have
__NR_finit_module. The testsuite would have to make the same check.
Instead, I'm reverting this change and I'm going to apply another patch
from Jan Luebbe who got this right from the beginning.
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There are several exported enums by libkmod without document, this patch
mainly added documentation for below enums like the way kmod_resources
be documented in.
* kmod_index
* kmod_remove
* kmod_insert
* kmod_probe
* kmod_filter
* kmod_module_initstate
This is not the best way to document these exported enums, however, it's
the simple way due to gtkdoc limits. It doesn't support export plain
enum like below: see https://bugzilla.gnome.org/show_bug.cgi?id=657444
---------8<-------head.h--------------8<-----------
...
enum foo {
...
};
...
---------8<-------end of head.h-------8<-----------
---------8<-------source.c------------8<-----------
...
/**
* document for foo here
*/
...
typedef enum foo foo;
...
---------8<-------end of source.c-----8<----------
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The modprobe.d (5) documentation for the "install" command
states that you could specify
install fred /sbin/modprobe barney; /sbin/modprobe --ignore-install fred
This makes some sense, but then the loading of "barney" is
hidden from the user who did only "modprobe fred". Thus,
it seems it should be possible to be able to unload the
"fred" module with "modprobe -r fred" by configuring the
"barney" module to also be removed:
remove fred /sbin/rmmod barney fred
(or similar.)
Make this possible by not checking the refcount when an
unload command was configured.
Reported-by: David Spinadel <david.spinadel@intel.com>
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Reported-by: Jean-Francis Roy <jeanfrancis@funtoo.org>
Reported-by: Jan Luebbe <jlu@pengutronix.de>
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Either with space or without, not a mix of both.
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When passing n=0, don't pass a NULL pointer, but instead pass anything
else (like the pointer to the start of the string).
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Add __attribute__((format)) to log_filep() and _show() functions, fixing
the bugs they found in the source code.
For functions that receive va_list instead of being variadic functions
we put 0 in the last argument, so at least the string is checked and we
get warnings of -Wformat-nonliteral type. So, it's better than adding a
pragma here to shut up the warning.
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kmod uses tab instead of spaces and tries to honour 80chr limit, when
that doesn't worsen the readability.
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Before:
c /dev/cpu/microcode 0600 - - - 10:184
c /dev/fuse 0600 - - - 10:229
c /dev/btrfs-control 0600 - - - 10:234
c /dev/loop-control 0600 - - - 10:237
c /dev/snd/timer 0600 - - - 116:33
After:
d /dev/cpu 0755 - - -
c /dev/cpu/microcode 0600 - - - 10:184
c /dev/fuse 0600 - - - 10:229
c /dev/btrfs-control 0600 - - - 10:234
c /dev/loop-control 0600 - - - 10:237
d /dev/snd 0755 - - -
c /dev/snd/timer 0600 - - - 116:33
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This file is created by depmod even if there's no node. In this case it
will be empty.
Previously 'kmod static-nodes' was segfaulting due to passing in==NULL
to fgets.
Also show the error message with %m.
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This tool reads modules.devname from the current kernel directory and outputs
the information. By default in a human-readable format, and optionally in
machine-readable formats.
For now only the tmpfiles.d(5) format is supported, but more could easily be
added in the future if there is a need.
This means nothing but kmod needs to reads the private files under
/lib/modules/. In particular systemd-udevd can stop reading modules.devname.
Tools that used to read /lib/modules/`uname -r`/modules.devname directly, can
now move to reading 'kmod static-nodes devname'.
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Both GCC and clang already supports C11's _Static_assert, so use it
instead of defining our own macro.
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Automake < 1.13 doesn't enable parallel tests by default, so add it to our
automake options.
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Use an if instead of a case statemente. If __NR_finit_module is not
defined in system headers we define it to -1, causing a "duplicate case
value" error. Yet, we don't want to actually call our finit_module()
function if -1 is passed.
This also fix errno being set with negative value.
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When we don't have finit_module() in libc (most likely because as of
today glibc didn't add it yet), we end up using
syscall(__NR_finit_module, ...). In this case we would not wrap the
function in the testsuite and thus having some tests failing:
TESTSUITE: ERR: could not insert module: Operation not permitted
This implementation relies on the fact that this is the only caller of
syscall(2), because we can't call libc's syscall(). There's an abort()
in place to be future safe: as soon as we need more calls to syscall(),
we can detect (and decide what to do).
Now we have all tests passing in the testsuite again.
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Check for finit_module() and don't use our own static inline function if
there's such function in libc (or another lib).
In testsuite we need to unconditionally define HAVE_FINIT_MODULE because
we want to override this function, and never use the static inline one
in missing.h
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Depending on kernel header and simply not passing the flags in
finit_module() if this header is not found is not good.
Add a missing.h header in which stuff like this should be added.
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"The secure_getenv() function is intended for use in general-purpose
libraries to avoid vulnerabilities that could occur if set-user-ID or
set-group-ID programs accidentally trusted the environment."
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Putting something like "alias psmouse deadbeef" is a hackish way to
blacklist a module. While I don't encourage doing so, let's not explode
if we fiund such config files.
A small difference from the behavior of module-init-tools: we exit with
0 instead of 1.
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Put this one /etc/modprobe.d/bougs.conf:
alias psmouse deaddood
`modprobe --show-depends --quiet psmouse` explodes in an assertion
(unless you have a module named deaddood). Some people and initrd's use
"alias psmouse off" to disable a module instead of blacklisting it or
adding a install rule.
Add a test with expected_fail == true before fixing this.
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Fix compilation issue with musl-libc:
CC libkmod/libkmod-list.lo
In file included from libkmod/libkmod-private.h:183:0,
from libkmod/libkmod-list.c:24:
libkmod/libkmod-util.h:33:45: warning: 'struct stat' declared inside parameter list [enabled by default]
libkmod/libkmod-util.h:33:45: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
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Currently modprobe -r will fail if a module is built in and report that it
is built in. rmmod calls the same function to determine state but doesn't
handle the KMOD_MODULE_BUILTIN return code. This leads to confusing errors
like this:
libkmod: kmod_module_get_holders: could not open '/sys/module/loop/holders': No such file or directory
Error: Module loop is in use
Fix this so that it actually reports the correct problem to the user.
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The first argument to mmap should be "NULL" instead of "0".
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This adds the finit_module logic to the testsuite.
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When a module is being loaded directly from disk (no compression, etc),
pass the file descriptor to the new finit_module() syscall. If the
finit_module syscall is exported by the kernel syscall headers, use it.
Additionally, if the kernel's module.h file is available, map kmod flags
to finit_module flags.
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If the module is built with CONFIG_MODULE_SIG, add the the signer's
name, hexadecimal key id and hash algorithm to the list returned in
kmod_module_get_info(). The modinfo output then looks like this:
filename: /home/mmarek/kmod/testsuite/rootfs-pristine/test-modinfo/ext4-x86_64-sha256.ko
license: GPL
description: Fourth Extended Filesystem
author: Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others
alias: ext3
alias: ext2
depends: mbcache,jbd2
intree: Y
vermagic: 3.7.0 SMP mod_unload
signer: Magrathea: Glacier signing key
sig_key: E3:C8:FC:A7:3F:B3:1D:DE:84:81:EF:38:E3:4C:DE:4B:0C:FD:1B:F9
sig_hashalgo: sha256
The signature algorithm (RSA) and key identifier type (X509) are not
displayed, because they are constant information for every signed
module. But it would be trivial to add this. Note: No attempt is made at
verifying the signature, I don't think that modinfo is the right tool
for this.
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In error case, just return NULL and let the caller free the list.
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These files are generated by Automake 1.13 when running the testsuite.
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Thanks to William Hubbs <w.d.hubbs@gmail.com> for spotting the bug.
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When the prefix symbol is set, take it into account while adding symbols
from System.map file by skipping it before "__ksymtab_" comparison.
Also, prevent inserted fake symbols (like "__this_module") from being
wrongly truncated from beginning.
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-P requires and uses an argument but its long counterpart --symbol-prefix does not:
depmod: option '--symbol-prefix' doesn't allow an argument
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In depfile_up_to_date_dir() we need to check if name has a kmod
extension. "path" variable there will be the directory name, which
doesn't contain an extension.
Without this, "depmod -A" returns that the modules.dep is up to date,
even if it isn't.
In depmod_modules_search_file() it's pointless to compare the basename,
so pass only the name to be checked.
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Also change the last field initializer in array to be empty.
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modinfo fails if there is a ".ko" substring in the path to the module
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When we are told to remove the "__versions" section we were mangling
that section instead of tweaking the SHF_ALLOC flag in its header.
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When told to force load a module, we were removing only the value of
vermagic instead of the complete entry.
Philippe De Swert (philippe.deswert@jollamobile.com) sent a patch that
was additionally mangling also the last two chars of the key
("vermagic="). Instead of creating an invalid entry in .modinfo section
like this, this patch removes the complete entry, key + value, by
zeroing the entire string.
Much thanks to Philippe who found the issue and pointed to the fix.
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If we are replacing a lower priority module (due to its location), we
already created a kmod_module, but didn't open the file for reading its
symbols. This means mod->kmod won't be NULL, and this is just ok. Since
all the functions freeing stuff below the previous assert already takes
NULL into consideration, it's safe to just unref mod->kmod and let the
right thing happens.
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We index modules in depmod by it's uncompressed relative path, not
relative path. We didn't notice this bug before since this function is
only triggered if we release a module to be replaced by one of higher
priority.
Also fix a leftover log message referring to relpath instead of
uncrelpath.
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Thanks to Dave Reisner for pointing this out.
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This also fixes a bug in "e6996c5 rmmod: route all messages to syslog if
told to" in which "+ verbose" was removed. Instead of letting verbose
add to kmod_get_log_priority(), let it be similar to the other programs
instead.
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When user supplied --help/-h, program should output to stdout the usage,
not to stderr. It's the expected behavior, what the user asked for,
not something to log or an error.
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No change is expected in the final binary since right now only an inline
function is shared. Later we expect to share more code.
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