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

[linux-2.6.git] / fs / gfs2 / eattr.h

diff --git a/fs/gfs2/eattr.h b/fs/gfs2/eattr.h
new file mode 100644 (file)
index 0000000..c82dbe0
--- /dev/null
+++ b/fs/gfs2/eattr.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License version 2.
+ */
+
+#ifndef __EATTR_DOT_H__
+#define __EATTR_DOT_H__
+
+struct gfs2_inode;
+struct iattr;
+
+#define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
+#define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
+
+#define GFS2_EA_SIZE(ea) \
+ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
+      ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
+                                  (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
+
+#define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
+#define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
+
+#define GFS2_EAREQ_SIZE_STUFFED(er) \
+ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
+
+#define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
+ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
+      sizeof(__be64) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)
+
+#define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
+#define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
+
+#define GFS2_EA2DATAPTRS(ea) \
+((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
+
+#define GFS2_EA2NEXT(ea) \
+((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
+
+#define GFS2_EA_BH2FIRST(bh) \
+((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
+
+#define GFS2_ERF_MODE 0x80000000
+
+struct gfs2_ea_request {
+       const char *er_name;
+       char *er_data;
+       unsigned int er_name_len;
+       unsigned int er_data_len;
+       unsigned int er_type; /* GFS2_EATYPE_... */
+       int er_flags;
+       mode_t er_mode;
+};
+
+struct gfs2_ea_location {
+       struct buffer_head *el_bh;
+       struct gfs2_ea_header *el_ea;
+       struct gfs2_ea_header *el_prev;
+};
+
+int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
+int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
+int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
+
+int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
+int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
+int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
+int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
+
+int gfs2_ea_dealloc(struct gfs2_inode *ip);
+
+/* Exported to acl.c */
+
+int gfs2_ea_find(struct gfs2_inode *ip,
+                struct gfs2_ea_request *er,
+                struct gfs2_ea_location *el);
+int gfs2_ea_get_copy(struct gfs2_inode *ip,
+                    struct gfs2_ea_location *el,
+                    char *data);
+int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
+                     struct iattr *attr, char *data);
+
+static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
+{
+       switch (ea->ea_type) {
+       case GFS2_EATYPE_USR:
+               return 5 + ea->ea_name_len + 1;
+       case GFS2_EATYPE_SYS:
+               return 7 + ea->ea_name_len + 1;
+       case GFS2_EATYPE_SECURITY:
+               return 9 + ea->ea_name_len + 1;
+       default:
+               return 0;
+       }
+}
+
+#endif /* __EATTR_DOT_H__ */