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virt: make virtualization enum a named type

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These days we have a mechanism for safely returning errnos in enum
types, via definining -ERRNO_MAX as one special enu value. Let's use
that for Virtualization.

No change in behaviour, just some typesafety improvement.
This commit is contained in:
Lennart Poettering
2022-04-04 11:36:26 +02:00
parent 0f534758d1
commit 1b86c7c59e
8 changed files with 119 additions and 107 deletions
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src/basic/virt.h
+11 -9
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@@ -3,9 +3,10 @@
#include <stdbool.h>
#include "errno-list.h"
#include "macro.h"
enum {
typedef enum Virtualization {
VIRTUALIZATION_NONE = 0,
VIRTUALIZATION_VM_FIRST,
@@ -43,23 +44,24 @@ enum {
_VIRTUALIZATION_MAX,
_VIRTUALIZATION_INVALID = -EINVAL,
};
_VIRTUALIZATION_ERRNO_MAX = -ERRNO_MAX, /* ensure full range of errno fits into this enum */
} Virtualization;
static inline bool VIRTUALIZATION_IS_VM(int x) {
static inline bool VIRTUALIZATION_IS_VM(Virtualization x) {
return x >= VIRTUALIZATION_VM_FIRST && x <= VIRTUALIZATION_VM_LAST;
}
static inline bool VIRTUALIZATION_IS_CONTAINER(int x) {
static inline bool VIRTUALIZATION_IS_CONTAINER(Virtualization x) {
return x >= VIRTUALIZATION_CONTAINER_FIRST && x <= VIRTUALIZATION_CONTAINER_LAST;
}
int detect_vm(void);
int detect_container(void);
int detect_virtualization(void);
Virtualization detect_vm(void);
Virtualization detect_container(void);
Virtualization detect_virtualization(void);
int running_in_userns(void);
int running_in_chroot(void);
const char *virtualization_to_string(int v) _const_;
int virtualization_from_string(const char *s) _pure_;
const char *virtualization_to_string(Virtualization v) _const_;
Virtualization virtualization_from_string(const char *s) _pure_;
bool has_cpu_with_flag(const char *flag);