| |
| #ifndef _LINUX_CAPABILITY_H |
| #define _LINUX_CAPABILITY_H |
| |
| #include <linux/types.h> |
| |
| struct task_struct; |
| |
| |
| |
| #define _LINUX_CAPABILITY_VERSION_1 0x19980330 |
| #define _LINUX_CAPABILITY_U32S_1 1 |
| |
| #define _LINUX_CAPABILITY_VERSION_2 0x20071026 |
| #define _LINUX_CAPABILITY_U32S_2 2 |
| |
| #define _LINUX_CAPABILITY_VERSION_3 0x20080522 |
| #define _LINUX_CAPABILITY_U32S_3 2 |
| |
| typedef struct __user_cap_header_struct { |
| __u32 version; |
| int pid; |
| } __user *cap_user_header_t; |
| |
| typedef struct __user_cap_data_struct { |
| __u32 effective; |
| __u32 permitted; |
| __u32 inheritable; |
| } __user *cap_user_data_t; |
| |
| |
| #define VFS_CAP_REVISION_MASK 0xFF000000 |
| #define VFS_CAP_REVISION_SHIFT 24 |
| #define VFS_CAP_FLAGS_MASK ~VFS_CAP_REVISION_MASK |
| #define VFS_CAP_FLAGS_EFFECTIVE 0x000001 |
| |
| #define VFS_CAP_REVISION_1 0x01000000 |
| #define VFS_CAP_U32_1 1 |
| #define XATTR_CAPS_SZ_1 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1)) |
| |
| #define VFS_CAP_REVISION_2 0x02000000 |
| #define VFS_CAP_U32_2 2 |
| #define XATTR_CAPS_SZ_2 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2)) |
| |
| #define XATTR_CAPS_SZ XATTR_CAPS_SZ_2 |
| #define VFS_CAP_U32 VFS_CAP_U32_2 |
| #define VFS_CAP_REVISION VFS_CAP_REVISION_2 |
| |
| struct vfs_cap_data { |
| __le32 magic_etc; |
| struct { |
| __le32 permitted; |
| __le32 inheritable; |
| } data[VFS_CAP_U32]; |
| }; |
| |
| #ifndef __KERNEL__ |
| |
| #define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1 |
| #define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1 |
| |
| #else |
| |
| #define _KERNEL_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_3 |
| #define _KERNEL_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_3 |
| |
| extern int file_caps_enabled; |
| |
| typedef struct kernel_cap_struct { |
| __u32 cap[_KERNEL_CAPABILITY_U32S]; |
| } kernel_cap_t; |
| |
| struct cpu_vfs_cap_data { |
| __u32 magic_etc; |
| kernel_cap_t permitted; |
| kernel_cap_t inheritable; |
| }; |
| |
| #define _USER_CAP_HEADER_SIZE (sizeof(struct __user_cap_header_struct)) |
| #define _KERNEL_CAP_T_SIZE (sizeof(kernel_cap_t)) |
| |
| #endif |
| |
| |
| |
| |
| #define CAP_CHOWN 0 |
| |
| |
| #define CAP_DAC_OVERRIDE 1 |
| |
| |
| #define CAP_DAC_READ_SEARCH 2 |
| |
| |
| #define CAP_FOWNER 3 |
| |
| |
| #define CAP_FSETID 4 |
| |
| |
| #define CAP_KILL 5 |
| |
| |
| #define CAP_SETGID 6 |
| |
| |
| #define CAP_SETUID 7 |
| |
| |
| |
| |
| #define CAP_SETPCAP 8 |
| |
| |
| #define CAP_LINUX_IMMUTABLE 9 |
| |
| |
| #define CAP_NET_BIND_SERVICE 10 |
| |
| |
| #define CAP_NET_BROADCAST 11 |
| |
| |
| #define CAP_NET_ADMIN 12 |
| |
| |
| #define CAP_NET_RAW 13 |
| |
| |
| #define CAP_IPC_LOCK 14 |
| |
| |
| #define CAP_IPC_OWNER 15 |
| |
| #define CAP_SYS_MODULE 16 |
| |
| |
| #define CAP_SYS_RAWIO 17 |
| |
| |
| #define CAP_SYS_CHROOT 18 |
| |
| |
| #define CAP_SYS_PTRACE 19 |
| |
| |
| #define CAP_SYS_PACCT 20 |
| |
| |
| #define CAP_SYS_ADMIN 21 |
| |
| |
| #define CAP_SYS_BOOT 22 |
| |
| |
| #define CAP_SYS_NICE 23 |
| |
| |
| #define CAP_SYS_RESOURCE 24 |
| |
| |
| #define CAP_SYS_TIME 25 |
| |
| |
| #define CAP_SYS_TTY_CONFIG 26 |
| |
| |
| #define CAP_MKNOD 27 |
| |
| |
| #define CAP_LEASE 28 |
| |
| #define CAP_AUDIT_WRITE 29 |
| |
| #define CAP_AUDIT_CONTROL 30 |
| |
| #define CAP_SETFCAP 31 |
| |
| |
| #define CAP_MAC_OVERRIDE 32 |
| |
| |
| #define CAP_MAC_ADMIN 33 |
| |
| |
| #define CAP_SYSLOG 34 |
| |
| |
| #define CAP_WAKE_ALARM 35 |
| |
| |
| #define CAP_LAST_CAP CAP_WAKE_ALARM |
| |
| #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) |
| |
| |
| #define CAP_TO_INDEX(x) ((x) >> 5) |
| #define CAP_TO_MASK(x) (1 << ((x) & 31)) |
| |
| #ifdef __KERNEL__ |
| |
| struct dentry; |
| struct user_namespace; |
| |
| struct user_namespace *current_user_ns(void); |
| |
| extern const kernel_cap_t __cap_empty_set; |
| extern const kernel_cap_t __cap_init_eff_set; |
| |
| |
| #define CAP_FOR_EACH_U32(__capi) \ |
| for (__capi = 0; __capi < _KERNEL_CAPABILITY_U32S; ++__capi) |
| |
| |
| # define CAP_FS_MASK_B0 (CAP_TO_MASK(CAP_CHOWN) \ |
| | CAP_TO_MASK(CAP_MKNOD) \ |
| | CAP_TO_MASK(CAP_DAC_OVERRIDE) \ |
| | CAP_TO_MASK(CAP_DAC_READ_SEARCH) \ |
| | CAP_TO_MASK(CAP_FOWNER) \ |
| | CAP_TO_MASK(CAP_FSETID)) |
| |
| # define CAP_FS_MASK_B1 (CAP_TO_MASK(CAP_MAC_OVERRIDE)) |
| |
| #if _KERNEL_CAPABILITY_U32S != 2 |
| # error Fix up hand-coded capability macro initializers |
| #else |
| |
| # define CAP_EMPTY_SET ((kernel_cap_t){{ 0, 0 }}) |
| # define CAP_FULL_SET ((kernel_cap_t){{ ~0, ~0 }}) |
| # define CAP_FS_SET ((kernel_cap_t){{ CAP_FS_MASK_B0 \ |
| | CAP_TO_MASK(CAP_LINUX_IMMUTABLE), \ |
| CAP_FS_MASK_B1 } }) |
| # define CAP_NFSD_SET ((kernel_cap_t){{ CAP_FS_MASK_B0 \ |
| | CAP_TO_MASK(CAP_SYS_RESOURCE), \ |
| CAP_FS_MASK_B1 } }) |
| |
| #endif |
| |
| # define cap_clear(c) do { (c) = __cap_empty_set; } while (0) |
| |
| #define cap_raise(c, flag) ((c).cap[CAP_TO_INDEX(flag)] |= CAP_TO_MASK(flag)) |
| #define cap_lower(c, flag) ((c).cap[CAP_TO_INDEX(flag)] &= ~CAP_TO_MASK(flag)) |
| #define cap_raised(c, flag) ((c).cap[CAP_TO_INDEX(flag)] & CAP_TO_MASK(flag)) |
| |
| #define CAP_BOP_ALL(c, a, b, OP) \ |
| do { \ |
| unsigned __capi; \ |
| CAP_FOR_EACH_U32(__capi) { \ |
| c.cap[__capi] = a.cap[__capi] OP b.cap[__capi]; \ |
| } \ |
| } while (0) |
| |
| #define CAP_UOP_ALL(c, a, OP) \ |
| do { \ |
| unsigned __capi; \ |
| CAP_FOR_EACH_U32(__capi) { \ |
| c.cap[__capi] = OP a.cap[__capi]; \ |
| } \ |
| } while (0) |
| |
| static inline kernel_cap_t cap_combine(const kernel_cap_t a, |
| const kernel_cap_t b) |
| { |
| kernel_cap_t dest; |
| CAP_BOP_ALL(dest, a, b, |); |
| return dest; |
| } |
| |
| static inline kernel_cap_t cap_intersect(const kernel_cap_t a, |
| const kernel_cap_t b) |
| { |
| kernel_cap_t dest; |
| CAP_BOP_ALL(dest, a, b, &); |
| return dest; |
| } |
| |
| static inline kernel_cap_t cap_drop(const kernel_cap_t a, |
| const kernel_cap_t drop) |
| { |
| kernel_cap_t dest; |
| CAP_BOP_ALL(dest, a, drop, &~); |
| return dest; |
| } |
| |
| static inline kernel_cap_t cap_invert(const kernel_cap_t c) |
| { |
| kernel_cap_t dest; |
| CAP_UOP_ALL(dest, c, ~); |
| return dest; |
| } |
| |
| static inline int cap_isclear(const kernel_cap_t a) |
| { |
| unsigned __capi; |
| CAP_FOR_EACH_U32(__capi) { |
| if (a.cap[__capi] != 0) |
| return 0; |
| } |
| return 1; |
| } |
| |
| static inline int cap_issubset(const kernel_cap_t a, const kernel_cap_t set) |
| { |
| kernel_cap_t dest; |
| dest = cap_drop(a, set); |
| return cap_isclear(dest); |
| } |
| |
| |
| static inline int cap_is_fs_cap(int cap) |
| { |
| const kernel_cap_t __cap_fs_set = CAP_FS_SET; |
| return !!(CAP_TO_MASK(cap) & __cap_fs_set.cap[CAP_TO_INDEX(cap)]); |
| } |
| |
| static inline kernel_cap_t cap_drop_fs_set(const kernel_cap_t a) |
| { |
| const kernel_cap_t __cap_fs_set = CAP_FS_SET; |
| return cap_drop(a, __cap_fs_set); |
| } |
| |
| static inline kernel_cap_t cap_raise_fs_set(const kernel_cap_t a, |
| const kernel_cap_t permitted) |
| { |
| const kernel_cap_t __cap_fs_set = CAP_FS_SET; |
| return cap_combine(a, |
| cap_intersect(permitted, __cap_fs_set)); |
| } |
| |
| static inline kernel_cap_t cap_drop_nfsd_set(const kernel_cap_t a) |
| { |
| const kernel_cap_t __cap_fs_set = CAP_NFSD_SET; |
| return cap_drop(a, __cap_fs_set); |
| } |
| |
| static inline kernel_cap_t cap_raise_nfsd_set(const kernel_cap_t a, |
| const kernel_cap_t permitted) |
| { |
| const kernel_cap_t __cap_nfsd_set = CAP_NFSD_SET; |
| return cap_combine(a, |
| cap_intersect(permitted, __cap_nfsd_set)); |
| } |
| |
| extern bool has_capability(struct task_struct *t, int cap); |
| extern bool has_ns_capability(struct task_struct *t, |
| struct user_namespace *ns, int cap); |
| extern bool has_capability_noaudit(struct task_struct *t, int cap); |
| extern bool has_ns_capability_noaudit(struct task_struct *t, |
| struct user_namespace *ns, int cap); |
| extern bool capable(int cap); |
| extern bool ns_capable(struct user_namespace *ns, int cap); |
| extern bool nsown_capable(int cap); |
| |
| extern int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps); |
| |
| #endif |
| |
| #endif |