1#include <linux/init.h> 2#include <linux/posix_acl.h> 3 4#define REISERFS_ACL_VERSION 0x0001 5 6typedef struct { 7 __le16 e_tag; 8 __le16 e_perm; 9 __le32 e_id; 10} reiserfs_acl_entry; 11 12typedef struct { 13 __le16 e_tag; 14 __le16 e_perm; 15} reiserfs_acl_entry_short; 16 17typedef struct { 18 __le32 a_version; 19} reiserfs_acl_header; 20 21static inline size_t reiserfs_acl_size(int count) 22{ 23 if (count <= 4) { 24 return sizeof(reiserfs_acl_header) + 25 count * sizeof(reiserfs_acl_entry_short); 26 } else { 27 return sizeof(reiserfs_acl_header) + 28 4 * sizeof(reiserfs_acl_entry_short) + 29 (count - 4) * sizeof(reiserfs_acl_entry); 30 } 31} 32 33static inline int reiserfs_acl_count(size_t size) 34{ 35 ssize_t s; 36 size -= sizeof(reiserfs_acl_header); 37 s = size - 4 * sizeof(reiserfs_acl_entry_short); 38 if (s < 0) { 39 if (size % sizeof(reiserfs_acl_entry_short)) 40 return -1; 41 return size / sizeof(reiserfs_acl_entry_short); 42 } else { 43 if (s % sizeof(reiserfs_acl_entry)) 44 return -1; 45 return s / sizeof(reiserfs_acl_entry) + 4; 46 } 47} 48 49#ifdef CONFIG_REISERFS_FS_POSIX_ACL 50struct posix_acl *reiserfs_get_acl(struct inode *inode, int type); 51int reiserfs_acl_chmod(struct inode *inode); 52int reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry, 53 struct inode *inode); 54int reiserfs_cache_default_acl(struct inode *dir); 55extern int reiserfs_xattr_posix_acl_init(void) __init; 56extern int reiserfs_xattr_posix_acl_exit(void); 57extern struct reiserfs_xattr_handler posix_acl_default_handler; 58extern struct reiserfs_xattr_handler posix_acl_access_handler; 59 60static inline void reiserfs_init_acl_access(struct inode *inode) 61{ 62 REISERFS_I(inode)->i_acl_access = NULL; 63} 64 65static inline void reiserfs_init_acl_default(struct inode *inode) 66{ 67 REISERFS_I(inode)->i_acl_default = NULL; 68} 69#else 70 71#define reiserfs_cache_default_acl(inode) 0 72 73static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) 74{ 75 return NULL; 76} 77 78static inline int reiserfs_xattr_posix_acl_init(void) 79{ 80 return 0; 81} 82 83static inline int reiserfs_xattr_posix_acl_exit(void) 84{ 85 return 0; 86} 87 88static inline int reiserfs_acl_chmod(struct inode *inode) 89{ 90 return 0; 91} 92 93static inline int 94reiserfs_inherit_default_acl(const struct inode *dir, struct dentry *dentry, 95 struct inode *inode) 96{ 97 return 0; 98} 99 100static inline void reiserfs_init_acl_access(struct inode *inode) 101{ 102} 103 104static inline void reiserfs_init_acl_default(struct inode *inode) 105{ 106} 107#endif 108