1 /*
2 * linux/fs/hfsplus/ioctl.c
3 *
4 * Copyright (C) 2003
5 * Ethan Benson <erbenson@alaska.net>
6 * partially derived from linux/fs/ext2/ioctl.c
7 * Copyright (C) 1993, 1994, 1995
8 * Remy Card (card@masi.ibp.fr)
9 * Laboratoire MASI - Institut Blaise Pascal
10 * Universite Pierre et Marie Curie (Paris VI)
11 *
12 * hfsplus ioctls
13 */
14
15 #include <linux/capability.h>
16 #include <linux/fs.h>
17 #include <linux/sched.h>
18 #include <linux/xattr.h>
19 #include <asm/uaccess.h>
20 #include "hfsplus_fs.h"
21
22 int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
23 unsigned long arg)
24 {
25 unsigned int flags;
26
27 switch (cmd) {
28 case HFSPLUS_IOC_EXT2_GETFLAGS:
29 flags = 0;
30 if (HFSPLUS_I(inode).rootflags & HFSPLUS_FLG_IMMUTABLE)
31 flags |= FS_IMMUTABLE_FL; /* EXT2_IMMUTABLE_FL */
32 if (HFSPLUS_I(inode).rootflags & HFSPLUS_FLG_APPEND)
33 flags |= FS_APPEND_FL; /* EXT2_APPEND_FL */
34 if (HFSPLUS_I(inode).userflags & HFSPLUS_FLG_NODUMP)
35 flags |= FS_NODUMP_FL; /* EXT2_NODUMP_FL */
36 return put_user(flags, (int __user *)arg);
37 case HFSPLUS_IOC_EXT2_SETFLAGS: {
38 if (IS_RDONLY(inode))
39 return -EROFS;
40
41 if (!is_owner_or_cap(inode))
42 return -EACCES;
43
44 if (get_user(flags, (int __user *)arg))
45 return -EFAULT;
46
47 if (flags & (FS_IMMUTABLE_FL|FS_APPEND_FL) ||
48 HFSPLUS_I(inode).rootflags & (HFSPLUS_FLG_IMMUTABLE|HFSPLUS_FLG_APPEND)) {
49 if (!capable(CAP_LINUX_IMMUTABLE))
50 return -EPERM;
51 }
52
53 /* don't silently ignore unsupported ext2 flags */
54 if (flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
55 return -EOPNOTSUPP;
56
57 if (flags & FS_IMMUTABLE_FL) { /* EXT2_IMMUTABLE_FL */
58 inode->i_flags |= S_IMMUTABLE;
59 HFSPLUS_I(inode).rootflags |= HFSPLUS_FLG_IMMUTABLE;
60 } else {
61 inode->i_flags &= ~S_IMMUTABLE;
62 HFSPLUS_I(inode).rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
63 }
64 if (flags & FS_APPEND_FL) { /* EXT2_APPEND_FL */
65 inode->i_flags |= S_APPEND;
66 HFSPLUS_I(inode).rootflags |= HFSPLUS_FLG_APPEND;
67 } else {
68 inode->i_flags &= ~S_APPEND;
69 HFSPLUS_I(inode).rootflags &= ~HFSPLUS_FLG_APPEND;
70 }
71 if (flags & FS_NODUMP_FL) /* EXT2_NODUMP_FL */
72 HFSPLUS_I(inode).userflags |= HFSPLUS_FLG_NODUMP;
73 else
74 HFSPLUS_I(inode).userflags &= ~HFSPLUS_FLG_NODUMP;
75
76 inode->i_ctime = CURRENT_TIME_SEC;
77 mark_inode_dirty(inode);
78 return 0;
79 }
80 default:
81 return -ENOTTY;
82 }
83 }
84
85 int hfsplus_setxattr(struct dentry *dentry, const char *name,
86 const void *value, size_t size, int flags)
87 {
88 struct inode *inode = dentry->d_inode;
89 struct hfs_find_data fd;
90 hfsplus_cat_entry entry;
91 struct hfsplus_cat_file *file;
92 int res;
93
94 if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode))
95 return -EOPNOTSUPP;
96
97 res = hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
98 if (res)
99 return res;
100 res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
101 if (res)
102 goto out;
103 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
104 sizeof(struct hfsplus_cat_file));
105 file = &entry.file;
106
107 if (!strcmp(name, "hfs.type")) {
108 if (size == 4)
109 memcpy(&file->user_info.fdType, value, 4);
110 else
111 res = -ERANGE;
112 } else if (!strcmp(name, "hfs.creator")) {
113 if (size == 4)
114 memcpy(&file->user_info.fdCreator, value, 4);
115 else
116 res = -ERANGE;
117 } else
118 res = -EOPNOTSUPP;
119 if (!res)
120 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
121 sizeof(struct hfsplus_cat_file));
122 out:
123 hfs_find_exit(&fd);
124 return res;
125 }
126
127 ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
128 void *value, size_t size)
129 {
130 struct inode *inode = dentry->d_inode;
131 struct hfs_find_data fd;
132 hfsplus_cat_entry entry;
133 struct hfsplus_cat_file *file;
134 ssize_t res = 0;
135
136 if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode))
137 return -EOPNOTSUPP;
138
139 if (size) {
140 res = hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
141 if (res)
142 return res;
143 res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
144 if (res)
145 goto out;
146 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
147 sizeof(struct hfsplus_cat_file));
148 }
149 file = &entry.file;
150
151 if (!strcmp(name, "hfs.type")) {
152 if (size >= 4) {
153 memcpy(value, &file->user_info.fdType, 4);
154 res = 4;
155 } else
156 res = size ? -ERANGE : 4;
157 } else if (!strcmp(name, "hfs.creator")) {
158 if (size >= 4) {
159 memcpy(value, &file->user_info.fdCreator, 4);
160 res = 4;
161 } else
162 res = size ? -ERANGE : 4;
163 } else
164 res = -ENODATA;
165 out:
166 if (size)
167 hfs_find_exit(&fd);
168 return res;
169 }
170
171 #define HFSPLUS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type"))
172
173 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size)
174 {
175 struct inode *inode = dentry->d_inode;
176
177 if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode))
178 return -EOPNOTSUPP;
179
180 if (!buffer || !size)
181 return HFSPLUS_ATTRLIST_SIZE;
182 if (size < HFSPLUS_ATTRLIST_SIZE)
183 return -ERANGE;
184 strcpy(buffer, "hfs.type");
185 strcpy(buffer + sizeof("hfs.type"), "hfs.creator");
186
187 return HFSPLUS_ATTRLIST_SIZE;
188 }
189
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