1 #include <linux/reiserfs_xattr.h> 2 #include <linux/init.h> 3 #include <linux/list.h> 4 #include <linux/rwsem.h> 5 #include <linux/xattr.h> 6 7 struct inode; 8 struct dentry; 9 struct iattr; 10 struct super_block; 11 12 int reiserfs_xattr_register_handlers(void) __init; 13 void reiserfs_xattr_unregister_handlers(void); 14 int reiserfs_xattr_init(struct super_block *sb, int mount_flags); 15 int reiserfs_lookup_privroot(struct super_block *sb); 16 int reiserfs_delete_xattrs(struct inode *inode); 17 int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); 18 int reiserfs_permission(struct inode *inode, int mask); 19 20 #ifdef CONFIG_REISERFS_FS_XATTR 21 #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir) 22 ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 23 24 int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); 25 int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); 26 int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *, 27 struct inode *, const char *, const void *, 28 size_t, int); 29 30 extern const struct xattr_handler reiserfs_xattr_user_handler; 31 extern const struct xattr_handler reiserfs_xattr_trusted_handler; 32 extern const struct xattr_handler reiserfs_xattr_security_handler; 33 #ifdef CONFIG_REISERFS_FS_SECURITY 34 int reiserfs_security_init(struct inode *dir, struct inode *inode, 35 const struct qstr *qstr, 36 struct reiserfs_security_handle *sec); 37 int reiserfs_security_write(struct reiserfs_transaction_handle *th, 38 struct inode *inode, 39 struct reiserfs_security_handle *sec); 40 void reiserfs_security_free(struct reiserfs_security_handle *sec); 41 #endif 42 43 static inline int reiserfs_xattrs_initialized(struct super_block *sb) 44 { 45 return REISERFS_SB(sb)->priv_root != NULL; 46 } 47 48 #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) 49 static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size) 50 { 51 loff_t ret = 0; 52 if (reiserfs_file_data_log(inode)) { 53 ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize); 54 ret >>= inode->i_sb->s_blocksize_bits; 55 } 56 return ret; 57 } 58 59 /* 60 * We may have to create up to 3 objects: xattr root, xattr dir, xattr file. 61 * Let's try to be smart about it. 62 * xattr root: We cache it. If it's not cached, we may need to create it. 63 * xattr dir: If anything has been loaded for this inode, we can set a flag 64 * saying so. 65 * xattr file: Since we don't cache xattrs, we can't tell. We always include 66 * blocks for it. 67 * 68 * However, since root and dir can be created between calls - YOU MUST SAVE 69 * THIS VALUE. 70 */ 71 static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode) 72 { 73 size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); 74 75 if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) { 76 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); 77 if (d_really_is_negative(REISERFS_SB(inode->i_sb)->xattr_root)) 78 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); 79 } 80 81 return nblocks; 82 } 83 84 static inline void reiserfs_init_xattr_rwsem(struct inode *inode) 85 { 86 init_rwsem(&REISERFS_I(inode)->i_xattr_sem); 87 } 88 89 #else 90 91 #define reiserfs_listxattr NULL 92 93 static inline void reiserfs_init_xattr_rwsem(struct inode *inode) 94 { 95 } 96 #endif /* CONFIG_REISERFS_FS_XATTR */ 97 98 #ifndef CONFIG_REISERFS_FS_SECURITY 99 static inline int reiserfs_security_init(struct inode *dir, 100 struct inode *inode, 101 const struct qstr *qstr, 102 struct reiserfs_security_handle *sec) 103 { 104 return 0; 105 } 106 static inline int 107 reiserfs_security_write(struct reiserfs_transaction_handle *th, 108 struct inode *inode, 109 struct reiserfs_security_handle *sec) 110 { 111 return 0; 112 } 113 static inline void reiserfs_security_free(struct reiserfs_security_handle *sec) 114 {} 115 #endif 116