Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / perf / util / target.c

diff --git a/kernel/tools/perf/util/target.c b/kernel/tools/perf/util/target.c
new file mode 100644 (file)
index 0000000..a53603b
--- /dev/null
+++ b/kernel/tools/perf/util/target.c
@@ -0,0 +1,155 @@
+/*
+ * Helper functions for handling target threads/cpus
+ *
+ * Copyright (C) 2012, LG Electronics, Namhyung Kim <namhyung.kim@lge.com>
+ *
+ * Released under the GPL v2.
+ */
+
+#include "target.h"
+#include "debug.h"
+
+#include <pwd.h>
+#include <string.h>
+
+
+enum target_errno target__validate(struct target *target)
+{
+       enum target_errno ret = TARGET_ERRNO__SUCCESS;
+
+       if (target->pid)
+               target->tid = target->pid;
+
+       /* CPU and PID are mutually exclusive */
+       if (target->tid && target->cpu_list) {
+               target->cpu_list = NULL;
+               if (ret == TARGET_ERRNO__SUCCESS)
+                       ret = TARGET_ERRNO__PID_OVERRIDE_CPU;
+       }
+
+       /* UID and PID are mutually exclusive */
+       if (target->tid && target->uid_str) {
+               target->uid_str = NULL;
+               if (ret == TARGET_ERRNO__SUCCESS)
+                       ret = TARGET_ERRNO__PID_OVERRIDE_UID;
+       }
+
+       /* UID and CPU are mutually exclusive */
+       if (target->uid_str && target->cpu_list) {
+               target->cpu_list = NULL;
+               if (ret == TARGET_ERRNO__SUCCESS)
+                       ret = TARGET_ERRNO__UID_OVERRIDE_CPU;
+       }
+
+       /* PID and SYSTEM are mutually exclusive */
+       if (target->tid && target->system_wide) {
+               target->system_wide = false;
+               if (ret == TARGET_ERRNO__SUCCESS)
+                       ret = TARGET_ERRNO__PID_OVERRIDE_SYSTEM;
+       }
+
+       /* UID and SYSTEM are mutually exclusive */
+       if (target->uid_str && target->system_wide) {
+               target->system_wide = false;
+               if (ret == TARGET_ERRNO__SUCCESS)
+                       ret = TARGET_ERRNO__UID_OVERRIDE_SYSTEM;
+       }
+
+       /* THREAD and SYSTEM/CPU are mutually exclusive */
+       if (target->per_thread && (target->system_wide || target->cpu_list)) {
+               target->per_thread = false;
+               if (ret == TARGET_ERRNO__SUCCESS)
+                       ret = TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD;
+       }
+
+       return ret;
+}
+
+enum target_errno target__parse_uid(struct target *target)
+{
+       struct passwd pwd, *result;
+       char buf[1024];
+       const char *str = target->uid_str;
+
+       target->uid = UINT_MAX;
+       if (str == NULL)
+               return TARGET_ERRNO__SUCCESS;
+
+       /* Try user name first */
+       getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
+
+       if (result == NULL) {
+               /*
+                * The user name not found. Maybe it's a UID number.
+                */
+               char *endptr;
+               int uid = strtol(str, &endptr, 10);
+
+               if (*endptr != '\0')
+                       return TARGET_ERRNO__INVALID_UID;
+
+               getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
+
+               if (result == NULL)
+                       return TARGET_ERRNO__USER_NOT_FOUND;
+       }
+
+       target->uid = result->pw_uid;
+       return TARGET_ERRNO__SUCCESS;
+}
+
+/*
+ * This must have a same ordering as the enum target_errno.
+ */
+static const char *target__error_str[] = {
+       "PID/TID switch overriding CPU",
+       "PID/TID switch overriding UID",
+       "UID switch overriding CPU",
+       "PID/TID switch overriding SYSTEM",
+       "UID switch overriding SYSTEM",
+       "SYSTEM/CPU switch overriding PER-THREAD",
+       "Invalid User: %s",
+       "Problems obtaining information for user %s",
+};
+
+int target__strerror(struct target *target, int errnum,
+                         char *buf, size_t buflen)
+{
+       int idx;
+       const char *msg;
+
+       BUG_ON(buflen == 0);
+
+       if (errnum >= 0) {
+               const char *err = strerror_r(errnum, buf, buflen);
+
+               if (err != buf)
+                       scnprintf(buf, buflen, "%s", err);
+
+               return 0;
+       }
+
+       if (errnum <  __TARGET_ERRNO__START || errnum >= __TARGET_ERRNO__END)
+               return -1;
+
+       idx = errnum - __TARGET_ERRNO__START;
+       msg = target__error_str[idx];
+
+       switch (errnum) {
+       case TARGET_ERRNO__PID_OVERRIDE_CPU ...
+            TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD:
+               snprintf(buf, buflen, "%s", msg);
+               break;
+
+       case TARGET_ERRNO__INVALID_UID:
+       case TARGET_ERRNO__USER_NOT_FOUND:
+               snprintf(buf, buflen, msg, target->uid_str);
+               break;
+
+       default:
+               /* cannot reach here */
+               break;
+       }
+
+       return 0;
+}