#ifndef _LINUX_CAPABILITY_H #define _LINUX_CAPABILITY_H #include 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