1
2
3
4
5
6
7
8
9
10#include <linux/fs.h>
11#include <linux/xattr.h>
12
13#include "hfs_fs.h"
14#include "btree.h"
15
16enum hfs_xattr_type {
17 HFS_TYPE,
18 HFS_CREATOR,
19};
20
21static int __hfs_setxattr(struct inode *inode, enum hfs_xattr_type type,
22 const void *value, size_t size, int flags)
23{
24 struct hfs_find_data fd;
25 hfs_cat_rec rec;
26 struct hfs_cat_file *file;
27 int res;
28
29 if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
30 return -EOPNOTSUPP;
31
32 res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
33 if (res)
34 return res;
35 fd.search_key->cat = HFS_I(inode)->cat_key;
36 res = hfs_brec_find(&fd);
37 if (res)
38 goto out;
39 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
40 sizeof(struct hfs_cat_file));
41 file = &rec.file;
42
43 switch (type) {
44 case HFS_TYPE:
45 if (size == 4)
46 memcpy(&file->UsrWds.fdType, value, 4);
47 else
48 res = -ERANGE;
49 break;
50
51 case HFS_CREATOR:
52 if (size == 4)
53 memcpy(&file->UsrWds.fdCreator, value, 4);
54 else
55 res = -ERANGE;
56 break;
57 }
58
59 if (!res)
60 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
61 sizeof(struct hfs_cat_file));
62out:
63 hfs_find_exit(&fd);
64 return res;
65}
66
67static ssize_t __hfs_getxattr(struct inode *inode, enum hfs_xattr_type type,
68 void *value, size_t size)
69{
70 struct hfs_find_data fd;
71 hfs_cat_rec rec;
72 struct hfs_cat_file *file;
73 ssize_t res = 0;
74
75 if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
76 return -EOPNOTSUPP;
77
78 if (size) {
79 res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
80 if (res)
81 return res;
82 fd.search_key->cat = HFS_I(inode)->cat_key;
83 res = hfs_brec_find(&fd);
84 if (res)
85 goto out;
86 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
87 sizeof(struct hfs_cat_file));
88 }
89 file = &rec.file;
90
91 switch (type) {
92 case HFS_TYPE:
93 if (size >= 4) {
94 memcpy(value, &file->UsrWds.fdType, 4);
95 res = 4;
96 } else
97 res = size ? -ERANGE : 4;
98 break;
99
100 case HFS_CREATOR:
101 if (size >= 4) {
102 memcpy(value, &file->UsrWds.fdCreator, 4);
103 res = 4;
104 } else
105 res = size ? -ERANGE : 4;
106 break;
107 }
108
109out:
110 if (size)
111 hfs_find_exit(&fd);
112 return res;
113}
114
115static int hfs_xattr_get(const struct xattr_handler *handler,
116 struct dentry *unused, struct inode *inode,
117 const char *name, void *value, size_t size)
118{
119 return __hfs_getxattr(inode, handler->flags, value, size);
120}
121
122static int hfs_xattr_set(const struct xattr_handler *handler,
123 struct dentry *unused, struct inode *inode,
124 const char *name, const void *value, size_t size,
125 int flags)
126{
127 if (!value)
128 return -EOPNOTSUPP;
129
130 return __hfs_setxattr(inode, handler->flags, value, size, flags);
131}
132
133static const struct xattr_handler hfs_creator_handler = {
134 .name = "hfs.creator",
135 .flags = HFS_CREATOR,
136 .get = hfs_xattr_get,
137 .set = hfs_xattr_set,
138};
139
140static const struct xattr_handler hfs_type_handler = {
141 .name = "hfs.type",
142 .flags = HFS_TYPE,
143 .get = hfs_xattr_get,
144 .set = hfs_xattr_set,
145};
146
147const struct xattr_handler *hfs_xattr_handlers[] = {
148 &hfs_creator_handler,
149 &hfs_type_handler,
150 NULL
151};
152
