1 /* SPDX-License-Identifier: GPL-2.0 */
3 #include <linux/bpf-cgroup.h>
5 #define DEVCG_ACC_MKNOD 1
6 #define DEVCG_ACC_READ 2
7 #define DEVCG_ACC_WRITE 4
8 #define DEVCG_ACC_MASK (DEVCG_ACC_MKNOD | DEVCG_ACC_READ | DEVCG_ACC_WRITE)
10 #define DEVCG_DEV_BLOCK 1
11 #define DEVCG_DEV_CHAR 2
12 #define DEVCG_DEV_ALL 4 /* this represents all devices */
14 #ifdef CONFIG_CGROUP_DEVICE
15 extern int __devcgroup_check_permission(short type, u32 major, u32 minor,
18 static inline int __devcgroup_check_permission(short type, u32 major, u32 minor,
23 #if defined(CONFIG_CGROUP_DEVICE) || defined(CONFIG_CGROUP_BPF)
24 static inline int devcgroup_check_permission(short type, u32 major, u32 minor,
27 int rc = BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type, major, minor, access);
32 return __devcgroup_check_permission(type, major, minor, access);
35 static inline int devcgroup_inode_permission(struct inode *inode, int mask)
37 short type, access = 0;
39 if (likely(!inode->i_rdev))
42 if (S_ISBLK(inode->i_mode))
43 type = DEVCG_DEV_BLOCK;
44 else if (S_ISCHR(inode->i_mode))
45 type = DEVCG_DEV_CHAR;
50 access |= DEVCG_ACC_WRITE;
52 access |= DEVCG_ACC_READ;
54 return devcgroup_check_permission(type, imajor(inode), iminor(inode),
58 static inline int devcgroup_inode_mknod(int mode, dev_t dev)
62 if (!S_ISBLK(mode) && !S_ISCHR(mode))
66 type = DEVCG_DEV_BLOCK;
68 type = DEVCG_DEV_CHAR;
70 return devcgroup_check_permission(type, MAJOR(dev), MINOR(dev),
75 static inline int devcgroup_inode_permission(struct inode *inode, int mask)
77 static inline int devcgroup_inode_mknod(int mode, dev_t dev)