diff options
| author | markj <markj@FreeBSD.org> | 2013-08-13 03:07:49 +0000 |
|---|---|---|
| committer | markj <markj@FreeBSD.org> | 2013-08-13 03:07:49 +0000 |
| commit | 80dd3f5e733e7d8ade978c6ff5f50dd66e87dc9b (patch) | |
| tree | dcad89fb8dcad3f906701c32834969307169d079 /sys/kern/kern_linker.c | |
| parent | c063aad382f7f397a474f5340d8be40d6eecf8d2 (diff) | |
| download | FreeBSD-src-80dd3f5e733e7d8ade978c6ff5f50dd66e87dc9b.zip FreeBSD-src-80dd3f5e733e7d8ade978c6ff5f50dd66e87dc9b.tar.gz | |
Add event handlers for module load and unload events. The load handlers are
called after the module has been loaded, and the unload handlers are called
before the module is unloaded. Moreover, the module unload handlers may
return an error to prevent the unload from proceeding.
Reviewed by: avg
MFC after: 2 weeks
Diffstat (limited to 'sys/kern/kern_linker.c')
| -rw-r--r-- | sys/kern/kern_linker.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sys/kern/kern_linker.c b/sys/kern/kern_linker.c index b3ab4df..883752b 100644 --- a/sys/kern/kern_linker.c +++ b/sys/kern/kern_linker.c @@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$"); #include <sys/module.h> #include <sys/mount.h> #include <sys/linker.h> +#include <sys/eventhandler.h> #include <sys/fcntl.h> #include <sys/jail.h> #include <sys/libkern.h> @@ -1046,6 +1047,9 @@ kern_kldload(struct thread *td, const char *file, int *fileid) lf->userrefs++; if (fileid != NULL) *fileid = lf->id; + + EVENTHANDLER_INVOKE(mod_load, lf); + #ifdef HWPMC_HOOKS KLD_DOWNGRADE(); pkm.pm_file = lf->filename; @@ -1101,8 +1105,10 @@ kern_kldunload(struct thread *td, int fileid, int flags) if (lf) { KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf->userrefs)); - /* Check if there are DTrace probes enabled on this file. */ - if (lf->nenabled > 0) { + EVENTHANDLER_INVOKE(mod_unload, lf, &error); + if (error != 0) + error = EBUSY; + else if (lf->nenabled > 0) { printf("kldunload: attempt to unload file that has" " DTrace probes enabled\n"); error = EBUSY; |
