lkml.org 
[lkml]   [2021]   [Dec]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [RFC PATCH v1 1/2] capability: Add cap_strings.
From
On 12/27/2021 12:54 PM, Francis Laniel wrote:
> 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),

I may just be old and slow, but why is this better than

[CAP_CHOWN] = "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)

\
 
 \ /
  Last update: 2021-12-27 23:27    [W:0.104 / U:1.552 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site