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review.shift-gmbh.com / SHIFTPHONES / kernel / common / e9fc2aa091ab8fa46e60d4c9d06a89305c441652 / . / fs / gfs2 / eattr.h
blob: 7b0291f99fd9fabc20071a1a70f11380ce3a384f [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -0400[diff] [blame]3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]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
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400[diff] [blame^]7 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]8 */
9
10#ifndef __EATTR_DOT_H__
11#define __EATTR_DOT_H__
12
13#define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
14#define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
15
16#define GFS2_EA_SIZE(ea) \
17ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
18 ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
19 (sizeof(uint64_t) * (ea)->ea_num_ptrs)), 8)
20
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]21#define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
22#define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
23
24#define GFS2_EAREQ_SIZE_STUFFED(er) \
25ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
26
27#define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
28ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500[diff] [blame]29 sizeof(uint64_t) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]30
31#define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
32#define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
33
34#define GFS2_EA2DATAPTRS(ea) \
35((uint64_t *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
36
37#define GFS2_EA2NEXT(ea) \
38((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
39
40#define GFS2_EA_BH2FIRST(bh) \
41((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
42
43#define GFS2_ERF_MODE 0x80000000
44
45struct gfs2_ea_request {
46 char *er_name;
47 char *er_data;
48 unsigned int er_name_len;
49 unsigned int er_data_len;
50 unsigned int er_type; /* GFS2_EATYPE_... */
51 int er_flags;
52 mode_t er_mode;
53};
54
55struct gfs2_ea_location {
56 struct buffer_head *el_bh;
57 struct gfs2_ea_header *el_ea;
58 struct gfs2_ea_header *el_prev;
59};
60
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]61int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
62int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
63int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
64
65int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
66int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
67int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
68int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
69
70int gfs2_ea_dealloc(struct gfs2_inode *ip);
71
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]72/* Exported to acl.c */
73
74int gfs2_ea_find(struct gfs2_inode *ip,
75 struct gfs2_ea_request *er,
76 struct gfs2_ea_location *el);
77int gfs2_ea_get_copy(struct gfs2_inode *ip,
78 struct gfs2_ea_location *el,
79 char *data);
80int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
81 struct iattr *attr, char *data);
82
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400[diff] [blame]83static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
84{
85 switch (ea->ea_type) {
86 case GFS2_EATYPE_USR:
87 return (5 + (ea->ea_name_len + 1));
88 case GFS2_EATYPE_SYS:
89 return (7 + (ea->ea_name_len + 1));
90 case GFS2_EATYPE_SECURITY:
91 return (9 + (ea->ea_name_len + 1));
92 default:
93 return (0);
94 }
95}
96
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]97#endif /* __EATTR_DOT_H__ */