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xattr.h
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1 /*
2  * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3  * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4  *
5  * This copyrighted material is made available to anyone wishing to use,
6  * modify, copy, or redistribute it subject to the terms and conditions
7  * of the GNU General Public License version 2.
8  */
9 
10 #ifndef __EATTR_DOT_H__
11 #define __EATTR_DOT_H__
12 
13 struct gfs2_inode;
14 struct iattr;
15 
16 #define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
17 #define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
18 
19 #define GFS2_EA_SIZE(ea) \
20 ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
21  ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
22  (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
23 
24 #define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
25 #define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
26 
27 #define GFS2_EAREQ_SIZE_STUFFED(er) \
28 ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
29 
30 #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
31 #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
32 
33 #define GFS2_EA2DATAPTRS(ea) \
34 ((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
35 
36 #define GFS2_EA2NEXT(ea) \
37 ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
38 
39 #define GFS2_EA_BH2FIRST(bh) \
40 ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
41 
43  const char *er_name;
44  char *er_data;
45  unsigned int er_name_len;
46  unsigned int er_data_len;
47  unsigned int er_type; /* GFS2_EATYPE_... */
48 };
49 
51  struct buffer_head *el_bh;
54 };
55 
56 extern int __gfs2_xattr_set(struct inode *inode, const char *name,
57  const void *value, size_t size,
58  int flags, int type);
59 extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
60 extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
61 
62 /* Exported to acl.c */
63 
64 extern int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **data);
65 extern int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data);
66 
67 #endif /* __EATTR_DOT_H__ */