This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / fs / jffs2 / xattr.h

diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h
new file mode 100644 (file)
index 0000000..06a5c69
--- /dev/null
+++ b/fs/jffs2/xattr.h
@@ -0,0 +1,129 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2006  NEC Corporation
+ *
+ * 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_
+
+#include <linux/xattr.h>
+#include <linux/list.h>
+
+#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;
+       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] */
+       atomic_t refcnt;                /* # of xattr_ref refers this */
+       uint32_t xid;
+       uint32_t version;
+
+       uint32_t data_crc;
+       uint32_t hashkey;
+       char *xname;            /* XATTR name without prefix */
+       uint32_t name_len;      /* length of xname */
+       char *xvalue;           /* XATTR value */
+       uint32_t value_len;     /* length of xvalue */
+};
+
+struct jffs2_inode_cache;
+struct jffs2_xattr_ref
+{
+       void *always_null;
+       struct jffs2_raw_node_ref *node;
+       uint8_t class;
+       uint8_t flags;          /* Currently unused */
+       u16 unused;
+
+       uint32_t xseqno;
+       union {
+               struct jffs2_inode_cache *ic;   /* reference to jffs2_inode_cache */
+               uint32_t ino;                   /* only used in scanning/building  */
+       };
+       union {
+               struct jffs2_xattr_datum *xd;   /* reference to jffs2_xattr_datum */
+               uint32_t xid;                   /* only used in sccanning/building */
+       };
+       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);
+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);
+
+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,
+                                            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 ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
+#define jffs2_getxattr         generic_getxattr
+#define jffs2_setxattr         generic_setxattr
+#define jffs2_removexattr      generic_removexattr
+
+#else
+
+#define jffs2_init_xattr_subsystem(c)
+#define jffs2_build_xattr_subsystem(c)
+#define jffs2_clear_xattr_subsystem(c)
+
+#define jffs2_xattr_delete_inode(c, ic)
+#define jffs2_xattr_free_inode(c, ic)
+#define jffs2_verify_xattr(c)                  (1)
+
+#define jffs2_xattr_handlers   NULL
+#define jffs2_listxattr                NULL
+#define jffs2_getxattr         NULL
+#define jffs2_setxattr         NULL
+#define jffs2_removexattr      NULL
+
+#endif /* CONFIG_JFFS2_FS_XATTR */
+
+#ifdef CONFIG_JFFS2_FS_SECURITY
+extern int jffs2_init_security(struct inode *inode, struct inode *dir);
+extern struct xattr_handler jffs2_security_xattr_handler;
+#else
+#define jffs2_init_security(inode,dir) (0)
+#endif /* CONFIG_JFFS2_FS_SECURITY */
+
+#endif /* _JFFS2_FS_XATTR_H_ */