reiserfs: journaled xattrs

[linux-2.6-omap-h63xx.git] / include / linux / reiserfs_xattr.h

diff --git a/include/linux/reiserfs_xattr.h b/include/linux/reiserfs_xattr.h
index 3bd154fd56e9800a96b3454b946d916c55e4b428..20eca09729a294f2ed44d0df879938411f0887e4 100644 (file)
--- a/include/linux/reiserfs_xattr.h
+++ b/include/linux/reiserfs_xattr.h
@@ -29,20 +29,6 @@ struct iattr;
 struct super_block;
 struct nameidata;
 
-struct reiserfs_xattr_handler {
-       char *prefix;
-       int (*init) (void);
-       void (*exit) (void);
-       int (*get) (struct inode * inode, const char *name, void *buffer,
-                   size_t size);
-       int (*set) (struct inode * inode, const char *name, const void *buffer,
-                   size_t size, int flags);
-       int (*del) (struct inode * inode, const char *name);
-       int (*list) (struct inode * inode, const char *name, int namelen,
-                    char *out);
-       struct list_head handlers;
-};
-
 int reiserfs_xattr_register_handlers(void) __init;
 void reiserfs_xattr_unregister_handlers(void);
 int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
@@ -59,13 +45,50 @@ ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 int reiserfs_removexattr(struct dentry *dentry, const char *name);
 int reiserfs_permission(struct inode *inode, int mask);
 
-int reiserfs_xattr_del(struct inode *, const char *);
-int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
+int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
 int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
+int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
+                             struct inode *, const char *, const void *,
+                             size_t, int);
+
+extern struct xattr_handler reiserfs_xattr_user_handler;
+extern struct xattr_handler reiserfs_xattr_trusted_handler;
+extern struct xattr_handler reiserfs_xattr_security_handler;
+
+#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
+static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
+{
+       loff_t ret = 0;
+       if (reiserfs_file_data_log(inode)) {
+               ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
+               ret >>= inode->i_sb->s_blocksize_bits;
+       }
+       return ret;
+}
+
+/* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
+ * Let's try to be smart about it.
+ * xattr root: We cache it. If it's not cached, we may need to create it.
+ * xattr dir: If anything has been loaded for this inode, we can set a flag
+ *            saying so.
+ * xattr file: Since we don't cache xattrs, we can't tell. We always include
+ *             blocks for it.
+ *
+ * However, since root and dir can be created between calls - YOU MUST SAVE
+ * THIS VALUE.
+ */
+static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
+{
+       size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
 
-extern struct reiserfs_xattr_handler user_handler;
-extern struct reiserfs_xattr_handler trusted_handler;
-extern struct reiserfs_xattr_handler security_handler;
+       if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
+               nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
+               if (REISERFS_SB(inode->i_sb)->xattr_root == NULL)
+                       nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
+       }
+
+       return nblocks;
+}
 
 static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
 {