1 /*
2 * linux/fs/hfs/attr.c
3 *
4 * (C) 2003 Ardis Technologies <roman@ardistech.com>
5 *
6 * Export hfs data via xattr
7 */
8
9
10 #include <linux/fs.h>
11 #include <linux/xattr.h>
12
13 #include "hfs_fs.h"
14 #include "btree.h"
15
hfs_setxattr(struct dentry * dentry,const char * name,const void * value,size_t size,int flags)16 int hfs_setxattr(struct dentry *dentry, const char *name,
17 const void *value, size_t size, int flags)
18 {
19 struct inode *inode = dentry->d_inode;
20 struct hfs_find_data fd;
21 hfs_cat_rec rec;
22 struct hfs_cat_file *file;
23 int res;
24
25 if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
26 return -EOPNOTSUPP;
27
28 res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
29 if (res)
30 return res;
31 fd.search_key->cat = HFS_I(inode)->cat_key;
32 res = hfs_brec_find(&fd);
33 if (res)
34 goto out;
35 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
36 sizeof(struct hfs_cat_file));
37 file = &rec.file;
38
39 if (!strcmp(name, "hfs.type")) {
40 if (size == 4)
41 memcpy(&file->UsrWds.fdType, value, 4);
42 else
43 res = -ERANGE;
44 } else if (!strcmp(name, "hfs.creator")) {
45 if (size == 4)
46 memcpy(&file->UsrWds.fdCreator, value, 4);
47 else
48 res = -ERANGE;
49 } else
50 res = -EOPNOTSUPP;
51 if (!res)
52 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
53 sizeof(struct hfs_cat_file));
54 out:
55 hfs_find_exit(&fd);
56 return res;
57 }
58
hfs_getxattr(struct dentry * dentry,const char * name,void * value,size_t size)59 ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
60 void *value, size_t size)
61 {
62 struct inode *inode = dentry->d_inode;
63 struct hfs_find_data fd;
64 hfs_cat_rec rec;
65 struct hfs_cat_file *file;
66 ssize_t res = 0;
67
68 if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
69 return -EOPNOTSUPP;
70
71 if (size) {
72 res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
73 if (res)
74 return res;
75 fd.search_key->cat = HFS_I(inode)->cat_key;
76 res = hfs_brec_find(&fd);
77 if (res)
78 goto out;
79 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
80 sizeof(struct hfs_cat_file));
81 }
82 file = &rec.file;
83
84 if (!strcmp(name, "hfs.type")) {
85 if (size >= 4) {
86 memcpy(value, &file->UsrWds.fdType, 4);
87 res = 4;
88 } else
89 res = size ? -ERANGE : 4;
90 } else if (!strcmp(name, "hfs.creator")) {
91 if (size >= 4) {
92 memcpy(value, &file->UsrWds.fdCreator, 4);
93 res = 4;
94 } else
95 res = size ? -ERANGE : 4;
96 } else
97 res = -ENODATA;
98 out:
99 if (size)
100 hfs_find_exit(&fd);
101 return res;
102 }
103
104 #define HFS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type"))
105
hfs_listxattr(struct dentry * dentry,char * buffer,size_t size)106 ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
107 {
108 struct inode *inode = dentry->d_inode;
109
110 if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
111 return -EOPNOTSUPP;
112
113 if (!buffer || !size)
114 return HFS_ATTRLIST_SIZE;
115 if (size < HFS_ATTRLIST_SIZE)
116 return -ERANGE;
117 strcpy(buffer, "hfs.type");
118 strcpy(buffer + sizeof("hfs.type"), "hfs.creator");
119
120 return HFS_ATTRLIST_SIZE;
121 }
122