/* Validate version */
if (version.version > KERN_MODULES_VERSION) {
goto error_version;
- } else {
- if (version.patchlevel > KERN_MODULES_PATCHLEVEL) {
- goto error_version;
- }
- else {
- if (version.sublevel > KERN_MODULES_SUBLEVEL) {
- goto error_version;
- }
- }
}
- DBG2("Kernel tracer version validated (%d.%d.%d)", version.version,
- version.patchlevel, version.sublevel);
-
+ DBG2("Kernel tracer version validated (major version %d)", version.version);
return 0;
error_version:
- ERR("Kernel version is not compatible %d.%d.%d (supporting <= %d.%d.%d)",
- version.version, version.patchlevel, version.sublevel,
- KERN_MODULES_VERSION, KERN_MODULES_PATCHLEVEL,
- KERN_MODULES_SUBLEVEL);
+ ERR("Kernel major version %d is not compatible (supporting <= %d)",
+ version.version, KERN_MODULES_VERSION)
ret = -1;
error:
return ret;
}
+
+/*
+ * Kernel work-arounds called at the start of sessiond main().
+ */
+int init_kernel_workarounds(void)
+{
+ FILE *fp;
+
+ /*
+ * boot_id needs to be read once before being used concurrently
+ * to deal with a Linux kernel race. A fix is proposed for
+ * upstream, but the work-around is needed for older kernels.
+ */
+ fp = fopen("/proc/sys/kernel/random/boot_id", "r");
+ if (!fp) {
+ goto end_boot_id;
+ }
+ while (!feof(fp)) {
+ char buf[37] = "";
+
+ (void) fread(buf, 1, sizeof(buf), fp);
+ }
+ fclose(fp);
+end_boot_id:
+
+ return 0;
+}