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Subject[RFC PATCH v1 1/2] capability: Add cap_strings.
Date
This array contains the capability names for the given capabilitiy.
For example, index CAP_BPF contains "CAP_BPF".

Signed-off-by: Francis Laniel <flaniel@linux.microsoft.com>
---
include/uapi/linux/capability.h | 1 +
kernel/capability.c | 45 +++++++++++++++++++++++++++++++++
2 files changed, 46 insertions(+)

diff --git a/include/uapi/linux/capability.h b/include/uapi/linux/capability.h
index 463d1ba2232a..9646654d5111 100644
--- a/include/uapi/linux/capability.h
+++ b/include/uapi/linux/capability.h
@@ -428,5 +428,6 @@ struct vfs_ns_cap_data {
#define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */
#define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */

+extern const char *cap_strings[];

#endif /* _UAPI_LINUX_CAPABILITY_H */
diff --git a/kernel/capability.c b/kernel/capability.c
index 46a361dde042..5a2e71dcd87b 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -15,6 +15,7 @@
#include <linux/mm.h>
#include <linux/export.h>
#include <linux/security.h>
+#include <linux/stringify.h>
#include <linux/syscalls.h>
#include <linux/pid_namespace.h>
#include <linux/user_namespace.h>
@@ -27,6 +28,50 @@
const kernel_cap_t __cap_empty_set = CAP_EMPTY_SET;
EXPORT_SYMBOL(__cap_empty_set);

+const char *cap_strings[] = {
+ [CAP_CHOWN] = __stringify_1(CAP_CHOWN),
+ [CAP_DAC_OVERRIDE] = __stringify_1(CAP_DAC_OVERRIDE),
+ [CAP_DAC_READ_SEARCH] = __stringify_1(CAP_DAC_READ_SEARCH),
+ [CAP_FOWNER] = __stringify_1(CAP_FOWNER),
+ [CAP_FSETID] = __stringify_1(CAP_FSETID),
+ [CAP_KILL] = __stringify_1(CAP_KILL),
+ [CAP_SETGID] = __stringify_1(CAP_SETGID),
+ [CAP_SETUID] = __stringify_1(CAP_SETUID),
+ [CAP_SETPCAP] = __stringify_1(CAP_SETPCAP),
+ [CAP_LINUX_IMMUTABLE] = __stringify_1(CAP_LINUX_IMMUTABLE),
+ [CAP_NET_BIND_SERVICE] = __stringify_1(CAP_NET_BIND_SERVICE),
+ [CAP_NET_BROADCAST] = __stringify_1(CAP_NET_BROADCAST),
+ [CAP_NET_ADMIN] = __stringify_1(CAP_NET_ADMIN),
+ [CAP_NET_RAW] = __stringify_1(CAP_NET_RAW),
+ [CAP_IPC_LOCK] = __stringify_1(CAP_IPC_LOCK),
+ [CAP_IPC_OWNER] = __stringify_1(CAP_IPC_OWNER),
+ [CAP_SYS_MODULE] = __stringify_1(CAP_SYS_MODULE),
+ [CAP_SYS_RAWIO] = __stringify_1(CAP_SYS_RAWIO),
+ [CAP_SYS_CHROOT] = __stringify_1(CAP_SYS_CHROOT),
+ [CAP_SYS_PTRACE] = __stringify_1(CAP_SYS_PTRACE),
+ [CAP_SYS_PACCT] = __stringify_1(CAP_SYS_PACCT),
+ [CAP_SYS_ADMIN] = __stringify_1(CAP_SYS_ADMIN),
+ [CAP_SYS_BOOT] = __stringify_1(CAP_SYS_BOOT),
+ [CAP_SYS_NICE] = __stringify_1(CAP_SYS_NICE),
+ [CAP_SYS_RESOURCE] = __stringify_1(CAP_SYS_RESOURCE),
+ [CAP_SYS_TIME] = __stringify_1(CAP_SYS_TIME),
+ [CAP_SYS_TTY_CONFIG] = __stringify_1(CAP_SYS_TTY_CONFIG),
+ [CAP_MKNOD] = __stringify_1(CAP_MKNOD),
+ [CAP_LEASE] = __stringify_1(CAP_LEASE),
+ [CAP_AUDIT_WRITE] = __stringify_1(CAP_AUDIT_WRITE),
+ [CAP_AUDIT_CONTROL] = __stringify_1(CAP_AUDIT_CONTROL),
+ [CAP_SETFCAP] = __stringify_1(CAP_SETFCAP),
+ [CAP_MAC_OVERRIDE] = __stringify_1(CAP_MAC_OVERRIDE),
+ [CAP_MAC_ADMIN] = __stringify_1(CAP_MAC_ADMIN),
+ [CAP_SYSLOG] = __stringify_1(CAP_SYSLOG),
+ [CAP_WAKE_ALARM] = __stringify_1(CAP_WAKE_ALARM),
+ [CAP_BLOCK_SUSPEND] = __stringify_1(CAP_BLOCK_SUSPEND),
+ [CAP_AUDIT_READ] = __stringify_1(CAP_AUDIT_READ),
+ [CAP_PERFMON] = __stringify_1(CAP_PERFMON),
+ [CAP_BPF] = __stringify_1(CAP_BPF),
+ [CAP_CHECKPOINT_RESTORE] = __stringify_1(CAP_CHECKPOINT_RESTORE),
+};
+
int file_caps_enabled = 1;

static int __init file_caps_disable(char *str)
--
2.30.2
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