| 1 | /* |
| 2 | File: linux/reiserfs_xattr.h |
| 3 | */ |
| 4 | |
| 5 | #ifndef _LINUX_REISERFS_XATTR_H |
| 6 | #define _LINUX_REISERFS_XATTR_H |
| 7 | |
| 8 | #include <linux/types.h> |
| 9 | |
| 10 | /* Magic value in header */ |
| 11 | #define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */ |
| 12 | |
| 13 | struct reiserfs_xattr_header { |
| 14 | __le32 h_magic; /* magic number for identification */ |
| 15 | __le32 h_hash; /* hash of the value */ |
| 16 | }; |
| 17 | |
| 18 | #ifdef __KERNEL__ |
| 19 | |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/list.h> |
| 22 | #include <linux/rwsem.h> |
| 23 | #include <linux/reiserfs_fs_i.h> |
| 24 | #include <linux/reiserfs_fs.h> |
| 25 | |
| 26 | struct inode; |
| 27 | struct dentry; |
| 28 | struct iattr; |
| 29 | struct super_block; |
| 30 | struct nameidata; |
| 31 | |
| 32 | struct reiserfs_xattr_handler { |
| 33 | char *prefix; |
| 34 | int (*init) (void); |
| 35 | void (*exit) (void); |
| 36 | int (*get) (struct inode * inode, const char *name, void *buffer, |
| 37 | size_t size); |
| 38 | int (*set) (struct inode * inode, const char *name, const void *buffer, |
| 39 | size_t size, int flags); |
| 40 | int (*del) (struct inode * inode, const char *name); |
| 41 | int (*list) (struct inode * inode, const char *name, int namelen, |
| 42 | char *out); |
| 43 | struct list_head handlers; |
| 44 | }; |
| 45 | |
| 46 | #ifdef CONFIG_REISERFS_FS_XATTR |
| 47 | #define is_reiserfs_priv_object(inode) IS_PRIVATE(inode) |
| 48 | #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir) |
| 49 | ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name, |
| 50 | void *buffer, size_t size); |
| 51 | int reiserfs_setxattr(struct dentry *dentry, const char *name, |
| 52 | const void *value, size_t size, int flags); |
| 53 | ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
| 54 | int reiserfs_removexattr(struct dentry *dentry, const char *name); |
| 55 | int reiserfs_delete_xattrs(struct inode *inode); |
| 56 | int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); |
| 57 | int reiserfs_xattr_init(struct super_block *sb, int mount_flags); |
| 58 | int reiserfs_permission(struct inode *inode, int mask); |
| 59 | |
| 60 | int reiserfs_xattr_del(struct inode *, const char *); |
| 61 | int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t); |
| 62 | int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); |
| 63 | |
| 64 | extern struct reiserfs_xattr_handler user_handler; |
| 65 | extern struct reiserfs_xattr_handler trusted_handler; |
| 66 | extern struct reiserfs_xattr_handler security_handler; |
| 67 | |
| 68 | int reiserfs_xattr_register_handlers(void) __init; |
| 69 | void reiserfs_xattr_unregister_handlers(void); |
| 70 | |
| 71 | static inline void reiserfs_write_lock_xattrs(struct super_block *sb) |
| 72 | { |
| 73 | down_write(&REISERFS_XATTR_DIR_SEM(sb)); |
| 74 | } |
| 75 | static inline void reiserfs_write_unlock_xattrs(struct super_block *sb) |
| 76 | { |
| 77 | up_write(&REISERFS_XATTR_DIR_SEM(sb)); |
| 78 | } |
| 79 | static inline void reiserfs_read_lock_xattrs(struct super_block *sb) |
| 80 | { |
| 81 | down_read(&REISERFS_XATTR_DIR_SEM(sb)); |
| 82 | } |
| 83 | |
| 84 | static inline void reiserfs_read_unlock_xattrs(struct super_block *sb) |
| 85 | { |
| 86 | up_read(&REISERFS_XATTR_DIR_SEM(sb)); |
| 87 | } |
| 88 | |
| 89 | static inline void reiserfs_write_lock_xattr_i(struct inode *inode) |
| 90 | { |
| 91 | down_write(&REISERFS_I(inode)->xattr_sem); |
| 92 | } |
| 93 | static inline void reiserfs_write_unlock_xattr_i(struct inode *inode) |
| 94 | { |
| 95 | up_write(&REISERFS_I(inode)->xattr_sem); |
| 96 | } |
| 97 | static inline void reiserfs_read_lock_xattr_i(struct inode *inode) |
| 98 | { |
| 99 | down_read(&REISERFS_I(inode)->xattr_sem); |
| 100 | } |
| 101 | |
| 102 | static inline void reiserfs_read_unlock_xattr_i(struct inode *inode) |
| 103 | { |
| 104 | up_read(&REISERFS_I(inode)->xattr_sem); |
| 105 | } |
| 106 | |
| 107 | static inline void reiserfs_mark_inode_private(struct inode *inode) |
| 108 | { |
| 109 | inode->i_flags |= S_PRIVATE; |
| 110 | } |
| 111 | |
| 112 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) |
| 113 | { |
| 114 | init_rwsem(&REISERFS_I(inode)->xattr_sem); |
| 115 | } |
| 116 | |
| 117 | #else |
| 118 | |
| 119 | #define is_reiserfs_priv_object(inode) 0 |
| 120 | #define reiserfs_mark_inode_private(inode) do {;} while(0) |
| 121 | #define reiserfs_getxattr NULL |
| 122 | #define reiserfs_setxattr NULL |
| 123 | #define reiserfs_listxattr NULL |
| 124 | #define reiserfs_removexattr NULL |
| 125 | #define reiserfs_write_lock_xattrs(sb) do {;} while(0) |
| 126 | #define reiserfs_write_unlock_xattrs(sb) do {;} while(0) |
| 127 | #define reiserfs_read_lock_xattrs(sb) |
| 128 | #define reiserfs_read_unlock_xattrs(sb) |
| 129 | |
| 130 | #define reiserfs_permission NULL |
| 131 | |
| 132 | #define reiserfs_xattr_register_handlers() 0 |
| 133 | #define reiserfs_xattr_unregister_handlers() |
| 134 | |
| 135 | static inline int reiserfs_delete_xattrs(struct inode *inode) |
| 136 | { |
| 137 | return 0; |
| 138 | }; |
| 139 | static inline int reiserfs_chown_xattrs(struct inode *inode, |
| 140 | struct iattr *attrs) |
| 141 | { |
| 142 | return 0; |
| 143 | }; |
| 144 | static inline int reiserfs_xattr_init(struct super_block *sb, int mount_flags) |
| 145 | { |
| 146 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL); /* to be sure */ |
| 147 | return 0; |
| 148 | }; |
| 149 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) |
| 150 | { |
| 151 | } |
| 152 | #endif /* CONFIG_REISERFS_FS_XATTR */ |
| 153 | |
| 154 | #endif /* __KERNEL__ */ |
| 155 | |
| 156 | #endif /* _LINUX_REISERFS_XATTR_H */ |