Return -errno instead of the value returned by init_module(). We need to
differentiate between the several errors that might occur, e.g. "module
already loaded", access denied, etc.
Treat module insertion as modprobe does: look for (soft-)dependencies, run
install commands, apply blacklist.
The difference with the blacklist is that it's applied to all modules,
including the dependencies. If you want to apply a blacklist only on the
module it's better to call the filter function by yourself.
This implementation detects loops caused by poorly written
soft-dependencies and fail gracefully, printing the loop to the log.
It only worked because n was always 1. kmod_list_remove returns a
pointer to the next element, relative to the removed one. Therefore we
need to always get a pointer to the last.
build: explicitly call PKG_PROG_PKG_CONFIG
Per the manual page, PKG_PROG_PKG_CONFIG needs to be invoked
explicitly if PKG_CHECK_MODULES might not happen (it is indeed stowed
in an AS_IF in kmod). Without this, funny failures can occur.
(As it did.)
Uses kmod_elf_get_dependency_symbols() that looks into ".symtab" for
UNDEF symbols and matches the name from ".strtab" to "__versions" to
get crc.
Likely the public API should unify the symbol information getters and
list release, they are almost the same.
Similar to module-init-tools load_symbols(), it will try .symtab and
.strtab for symbols starting with __crc_, if they are found their crc
is read from ELF's Elf_Sym::st_value.
If not found, then it will fallback to __ksymtab_strings.
Just now realized that my distro (Gentoo) enables support for gzip but
does not compress modules by default.
In this case it's better to have a special case that uses mmap()
instead of a loop of realloc() + gzread().
We need to keep config files sorted and use them taking the precedence
order into account.
The following message was taken from module-init-tools commit doing a
similar thing:
Configuration files are parsed in alphabetic order, regardles of
what directory they reside in. Furthermore, if several files by
the same name exist in different directories only the one in the
directory with highest precedence is loaded.
The order of precedence is /run, /etc, /usr/lib, /lib.
The sad thing is that we are not using openat() anymore since each file
is in different directories. In future we might change the
implementation to open all DIRs and keep a reference
to them instead of the path. However we'd have to keep a separate list
with all the opened dirs so we can close them later (when all configs
are parsed).
Check if '=' appeared before the dot. In this case, it's not a valid
module option in kernel command line.
The command line that was failing is:
"root=/dev/sda3 ro pcie_aspm=force init=/sbin/bootchartd
initrd=../initramfs-linux.img BOOT_IMAGE=../vmlinuz-linux"
