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 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_inode_permission(struct inode *inode, int mask)
26 short type, access = 0;
28 if (likely(!inode->i_rdev))
31 if (S_ISBLK(inode->i_mode))
32 type = DEVCG_DEV_BLOCK;
33 else if (S_ISCHR(inode->i_mode))
34 type = DEVCG_DEV_CHAR;
39 access |= DEVCG_ACC_WRITE;
41 access |= DEVCG_ACC_READ;
43 return devcgroup_check_permission(type, imajor(inode), iminor(inode),
47 static inline int devcgroup_inode_mknod(int mode, dev_t dev)
51 if (!S_ISBLK(mode) && !S_ISCHR(mode))
55 type = DEVCG_DEV_BLOCK;
57 type = DEVCG_DEV_CHAR;
59 return devcgroup_check_permission(type, MAJOR(dev), MINOR(dev),
64 static inline int devcgroup_inode_permission(struct inode *inode, int mask)
66 static inline int devcgroup_inode_mknod(int mode, dev_t dev)