/* SPDX-License-Identifier: GPL-2.0 */ #include <linux/fs.h>#define DEVCG_ACC_MKNOD 1#define DEVCG_ACC_READ 2#define DEVCG_ACC_WRITE 4#define DEVCG_ACC_MASK (DEVCG_ACC_MKNOD | DEVCG_ACC_READ | DEVCG_ACC_WRITE)#define DEVCG_DEV_BLOCK 1#define DEVCG_DEV_CHAR 2#define DEVCG_DEV_ALL 4 /* this represents all devices */ #if defined (CONFIG_CGROUP_DEVICE) || defined (CONFIG_CGROUP_BPF)int devcgroup_check_permission(short type, u32 major, u32 minor,short access);static inline int devcgroup_inode_permission(struct inode *inode, int mask)short type, access = 0;if (likely(!S_ISBLK(inode->i_mode) && !S_ISCHR(inode->i_mode)))return 0;if (likely(!inode->i_rdev))return 0;if (S_ISBLK(inode->i_mode))else /* S_ISCHR by the test above */ if (mask & MAY_WRITE)if (mask & MAY_READ)return devcgroup_check_permission(type, imajor(inode), iminor(inode),static inline int devcgroup_inode_mknod(int mode, dev_t dev)short type;if (!S_ISBLK(mode) && !S_ISCHR(mode))return 0;if (S_ISCHR(mode) && dev == WHITEOUT_DEV)return 0;if (S_ISBLK(mode))else return devcgroup_check_permission(type, MAJOR(dev), MINOR(dev),#else static inline int devcgroup_check_permission(short type, u32 major, u32 minor,short access)return 0; }static inline int devcgroup_inode_permission(struct inode *inode, int mask)return 0; }static inline int devcgroup_inode_mknod(int mode, dev_t dev)return 0; }#endif quality 95%
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