Handle install/remove commands just like modprobe does. Test configure
file:
install installme echo "this is a install message"
remove removeme echo "this is a remove message"
Tests:
$ ./tools/kmod-modprobe installme
this is a install message
$ ./tools/kmod-modprobe -r removeme
this is a remove message
$ ./tools/kmod-modprobe removeme
FATAL: Module removeme not found.
./tools/kmod-modprobe -r installme
FATAL: Module installme not found.
The check for remove/install commands must be before the ignore_loaded
check because we will actually run something instead of
removing/inserting a module and the modname might not correspond to a
real module. Otherwise a fake module like "remove removeme echo 'bla'"
would not work.
This also keeps compatibility with modprobe.
module-init-tools modprobe.c use fnmatch() and not strcmp() to match
commands and softdeps, although the man page does not say so. Then use
the same function to provide compatibility.
Implement soft dependencies in a way similar to module-init-tools
modprobe. Unlike regular dependencies they are allowed to fail
inserting or removing.
The rmmod version walks the lists in reverse order, also doing post
before and pre later.
kmod_list_prev() should return NULL if the current element is the
head, not if the previous element is the head. This was likely a copy
& paste error from kmod_list_next().
Install and remove commands are now properly treated on lookup. Example
config file:
$ ./test/test-lookup installme
libkmod version 1
Alias: 'installme'
Modules matching:
installme
install commands: 'echo "this is a install message"'
$ ./test/test-lookup removeme
libkmod version 1
Alias: 'removeme'
Modules matching:
removeme
remove commands: 'echo "this is a remove message"'
modprobe from module-init-tools does not use more than one
install/remove command, it just stops on the first one. Test
modprobe.conf:
install bla echo "this is a message"
install bla echo "this is a message"
$ modprobe bla
this is a message
$
Install and remove commands are already a legacy thing we need to carry,
but let's not extend it so people do not start doing crazy things.
With this patch we are breaking on the first element we find in the
configuration. May be we can add a warning later when parsing the config
that install commands are duplicated.
Module was never being removed from hash table. Therefore, if we create
a module, unref it and create it again we will access freed memory.
Commit "53385cf Improve test of double references" introduced a new test
in test-mod-double-ref.c that previously to this commit was crashing and
now it's working fine.
The hash key is not copied so we can't change the string from:
modname/modalias
to:
modname'\0'modalias
in order to setup mod->name and mod->alias.
Now what we do is:
1) if name is in the form 'modname/modalias', the final struct
kmod_module will be:
struct kmod_module {
char *alias;------,
char *name;-----, |
char *hashkey;--|-|-,
} | | |
name <------------------' | |
alias <-------------------' |
hashkey <-------------------'
2) if name is in the simple form 'modname', then the final struct
kmod_module will be:
struct kmod_module {
char *alias;------> NULL
char *name;-----,
char *hashkey;--|---,
} | |
name <------------------*---'
1 alias may correspond to more than 1 module. This would cause a
conflict in the hash table when inserting a module there and bad things
could happen.
Now we use 'modname/aliasname' as key, '/aliasname' part being optional.
Internally kmod_module_new_from_alias() will setup a 'modname/aliasname'
string and pass to kmod_module_new_from_name() that will treat the case
with a '/' in the name.
User might call kmod_module_new_from_name() without any slashes, so the
key my not contain it.
We have a static vector of indexes. There's no need to check if they
have a suffix or if they are absolute, we just already know in advance
and there are no plans to change it.
Remove function kmod_resolve_alias_options since it's not needed
anymore. Test is using the following configuration file:
alias blablabla ac
options ac test=1
options blablabla test=2
Lookup test by module name:
$ ./test/test-lookup ac
libkmod version 1
Alias: 'ac'
Modules matching:
ac
options: 'test=1'
Lookup test by alias:
$ ./test/test-lookup blablabla
libkmod version 1
Alias: 'blablabla'
Modules matching:
ac
options: 'test=1 test=2'
Lucas De Marchi
Gustavo Sverzut Barbieri
Cristian Rodríguez
Ulisses Furquim
Luis Felipe Strano Moraes