proc: remove obsolete comments

[safe/jmp/linux-2.6] / fs / jffs2 / xattr.h

diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h
index 750d77e..cf4f575 100644 (file)
--- a/fs/jffs2/xattr.h
+++ b/fs/jffs2/xattr.h
@@ -1,12 +1,13 @@
-/*-------------------------------------------------------------------------*
- *  File: fs/jffs2/xattr.c
- *  XATTR support on JFFS2 FileSystem
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
  *
- *  Implemented by KaiGai Kohei <kaigai@ak.jp.nec.com>
- *  Copyright (C) 2006 NEC Corporation
+ * Copyright © 2006  NEC Corporation
  *
- *  For licensing information, see the file 'LICENCE' in the jffs2 directory.
- *-------------------------------------------------------------------------*/
+ * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ */
 
 #ifndef _JFFS2_FS_XATTR_H_
 #define _JFFS2_FS_XATTR_H_
@@ -16,17 +17,19 @@
 
 #define JFFS2_XFLAGS_HOT       (0x01)  /* This datum is HOT */
 #define JFFS2_XFLAGS_BIND      (0x02)  /* This datum is not reclaimed */
+#define JFFS2_XFLAGS_DEAD      (0x40)  /* This datum is already dead */
+#define JFFS2_XFLAGS_INVALID   (0x80)  /* This datum contains crc error */
 
 struct jffs2_xattr_datum
 {
        void *always_null;
-       u8 class;
-       u8 flags;
-       u16 xprefix;                    /* see JFFS2_XATTR_PREFIX_* */
-
        struct jffs2_raw_node_ref *node;
+       uint8_t class;
+       uint8_t flags;
+       uint16_t xprefix;               /* see JFFS2_XATTR_PREFIX_* */
+
        struct list_head xindex;        /* chained from c->xattrindex[n] */
-       uint32_t refcnt;                /* # of xattr_ref refers this */
+       atomic_t refcnt;                /* # of xattr_ref refers this */
        uint32_t xid;
        uint32_t version;
 
@@ -38,15 +41,16 @@ struct jffs2_xattr_datum
        uint32_t value_len;     /* length of xvalue */
 };
 
-struct jffs2_inode_cache;      /* forward refence */
+struct jffs2_inode_cache;
 struct jffs2_xattr_ref
 {
        void *always_null;
-       u8 class;
-       u8 flags;               /* Currently unused */
+       struct jffs2_raw_node_ref *node;
+       uint8_t class;
+       uint8_t flags;          /* Currently unused */
        u16 unused;
 
-       struct jffs2_raw_node_ref *node;
+       uint32_t xseqno;
        union {
                struct jffs2_inode_cache *ic;   /* reference to jffs2_inode_cache */
                uint32_t ino;                   /* only used in scanning/building  */
@@ -58,6 +62,12 @@ struct jffs2_xattr_ref
        struct jffs2_xattr_ref *next;           /* chained from ic->xref_list */
 };
 
+#define XREF_DELETE_MARKER     (0x00000001)
+static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref)
+{
+       return ((ref->xseqno & XREF_DELETE_MARKER) != 0);
+}
+
 #ifdef CONFIG_JFFS2_FS_XATTR
 
 extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c);
@@ -65,23 +75,27 @@ extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c);
 extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c);
 
 extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
-                                                  uint32_t xid, uint32_t version);
+                                                        uint32_t xid, uint32_t version);
 
 extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
 extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
 
-extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd);
-extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref);
+extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd,
+                                            struct jffs2_raw_node_ref *raw);
+extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref,
+                                          struct jffs2_raw_node_ref *raw);
 extern int jffs2_verify_xattr(struct jffs2_sb_info *c);
+extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd);
+extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref);
 
 extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname,
                             char *buffer, size_t size);
 extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname,
                             const char *buffer, size_t size, int flags);
 
-extern struct xattr_handler *jffs2_xattr_handlers[];
-extern struct xattr_handler jffs2_user_xattr_handler;
-extern struct xattr_handler jffs2_trusted_xattr_handler;
+extern const struct xattr_handler *jffs2_xattr_handlers[];
+extern const struct xattr_handler jffs2_user_xattr_handler;
+extern const struct xattr_handler jffs2_trusted_xattr_handler;
 
 extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
 #define jffs2_getxattr         generic_getxattr
@@ -108,7 +122,7 @@ extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
 
 #ifdef CONFIG_JFFS2_FS_SECURITY
 extern int jffs2_init_security(struct inode *inode, struct inode *dir);
-extern struct xattr_handler jffs2_security_xattr_handler;
+extern const struct xattr_handler jffs2_security_xattr_handler;
 #else
 #define jffs2_init_security(inode,dir) (0)
 #endif /* CONFIG_JFFS2_FS_SECURITY */