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9#include "hpfs_fn.h"
10
11void hpfs_init_inode(struct inode *i)
12{
13 struct super_block *sb = i->i_sb;
14 struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
15
16 i->i_uid = hpfs_sb(sb)->sb_uid;
17 i->i_gid = hpfs_sb(sb)->sb_gid;
18 i->i_mode = hpfs_sb(sb)->sb_mode;
19 hpfs_inode->i_conv = hpfs_sb(sb)->sb_conv;
20 i->i_size = -1;
21 i->i_blocks = -1;
22
23 hpfs_inode->i_dno = 0;
24 hpfs_inode->i_n_secs = 0;
25 hpfs_inode->i_file_sec = 0;
26 hpfs_inode->i_disk_sec = 0;
27 hpfs_inode->i_dpos = 0;
28 hpfs_inode->i_dsubdno = 0;
29 hpfs_inode->i_ea_mode = 0;
30 hpfs_inode->i_ea_uid = 0;
31 hpfs_inode->i_ea_gid = 0;
32 hpfs_inode->i_ea_size = 0;
33
34 hpfs_inode->i_rddir_off = NULL;
35 hpfs_inode->i_dirty = 0;
36
37 i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0;
38 i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0;
39 i->i_atime.tv_sec = i->i_atime.tv_nsec = 0;
40}
41
42void hpfs_read_inode(struct inode *i)
43{
44 struct buffer_head *bh;
45 struct fnode *fnode;
46 struct super_block *sb = i->i_sb;
47 struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
48 unsigned char *ea;
49 int ea_size;
50
51 if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
52
53
54
55
56
57 make_bad_inode(i);
58 return;
59 }
60 if (hpfs_sb(i->i_sb)->sb_eas) {
61 if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
62 if (ea_size == 2) {
63 i->i_uid = le16_to_cpu(*(__le16*)ea);
64 hpfs_inode->i_ea_uid = 1;
65 }
66 kfree(ea);
67 }
68 if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
69 if (ea_size == 2) {
70 i->i_gid = le16_to_cpu(*(__le16*)ea);
71 hpfs_inode->i_ea_gid = 1;
72 }
73 kfree(ea);
74 }
75 if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) {
76 kfree(ea);
77 i->i_mode = S_IFLNK | 0777;
78 i->i_op = &page_symlink_inode_operations;
79 i->i_data.a_ops = &hpfs_symlink_aops;
80 i->i_nlink = 1;
81 i->i_size = ea_size;
82 i->i_blocks = 1;
83 brelse(bh);
84 return;
85 }
86 if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) {
87 int rdev = 0;
88 umode_t mode = hpfs_sb(sb)->sb_mode;
89 if (ea_size == 2) {
90 mode = le16_to_cpu(*(__le16*)ea);
91 hpfs_inode->i_ea_mode = 1;
92 }
93 kfree(ea);
94 i->i_mode = mode;
95 if (S_ISBLK(mode) || S_ISCHR(mode)) {
96 if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) {
97 if (ea_size == 4)
98 rdev = le32_to_cpu(*(__le32*)ea);
99 kfree(ea);
100 }
101 }
102 if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
103 brelse(bh);
104 i->i_nlink = 1;
105 i->i_size = 0;
106 i->i_blocks = 1;
107 init_special_inode(i, mode,
108 new_decode_dev(rdev));
109 return;
110 }
111 }
112 }
113 if (fnode->dirflag) {
114 unsigned n_dnodes, n_subdirs;
115 i->i_mode |= S_IFDIR;
116 i->i_op = &hpfs_dir_iops;
117 i->i_fop = &hpfs_dir_ops;
118 hpfs_inode->i_parent_dir = fnode->up;
119 hpfs_inode->i_dno = fnode->u.external[0].disk_secno;
120 if (hpfs_sb(sb)->sb_chk >= 2) {
121 struct buffer_head *bh0;
122 if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0);
123 }
124 n_dnodes = 0; n_subdirs = 0;
125 hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL);
126 i->i_blocks = 4 * n_dnodes;
127 i->i_size = 2048 * n_dnodes;
128 i->i_nlink = 2 + n_subdirs;
129 } else {
130 i->i_mode |= S_IFREG;
131 if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111;
132 i->i_op = &hpfs_file_iops;
133 i->i_fop = &hpfs_file_ops;
134 i->i_nlink = 1;
135 i->i_size = fnode->file_size;
136 i->i_blocks = ((i->i_size + 511) >> 9) + 1;
137 i->i_data.a_ops = &hpfs_aops;
138 hpfs_i(i)->mmu_private = i->i_size;
139 }
140 brelse(bh);
141}
142
143static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode)
144{
145 struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
146
147
148
149
150 if (hpfs_sb(i->i_sb)->sb_eas >= 2) {
151 __le32 ea;
152 if ((i->i_uid != hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) {
153 ea = cpu_to_le32(i->i_uid);
154 hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2);
155 hpfs_inode->i_ea_uid = 1;
156 }
157 if ((i->i_gid != hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) {
158 ea = cpu_to_le32(i->i_gid);
159 hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2);
160 hpfs_inode->i_ea_gid = 1;
161 }
162 if (!S_ISLNK(i->i_mode))
163 if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111))
164 | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))
165 && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333))
166 | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) {
167 ea = cpu_to_le32(i->i_mode);
168
169 hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2);
170 hpfs_inode->i_ea_mode = 1;
171 }
172 if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) {
173 ea = cpu_to_le32(new_encode_dev(i->i_rdev));
174 hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4);
175 }
176 }
177}
178
179void hpfs_write_inode(struct inode *i)
180{
181 struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
182 struct inode *parent;
183 if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
184 if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) {
185 if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n");
186 kfree(hpfs_inode->i_rddir_off);
187 hpfs_inode->i_rddir_off = NULL;
188 }
189 mutex_lock(&hpfs_inode->i_parent_mutex);
190 if (!i->i_nlink) {
191 mutex_unlock(&hpfs_inode->i_parent_mutex);
192 return;
193 }
194 parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir);
195 if (parent) {
196 hpfs_inode->i_dirty = 0;
197 if (parent->i_state & I_NEW) {
198 hpfs_init_inode(parent);
199 hpfs_read_inode(parent);
200 unlock_new_inode(parent);
201 }
202 mutex_lock(&hpfs_inode->i_mutex);
203 hpfs_write_inode_nolock(i);
204 mutex_unlock(&hpfs_inode->i_mutex);
205 iput(parent);
206 } else {
207 mark_inode_dirty(i);
208 }
209 mutex_unlock(&hpfs_inode->i_parent_mutex);
210}
211
212void hpfs_write_inode_nolock(struct inode *i)
213{
214 struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
215 struct buffer_head *bh;
216 struct fnode *fnode;
217 struct quad_buffer_head qbh;
218 struct hpfs_dirent *de;
219 if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
220 if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
221 if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) {
222 if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) {
223 brelse(bh);
224 return;
225 }
226 } else de = NULL;
227 if (S_ISREG(i->i_mode)) {
228 fnode->file_size = i->i_size;
229 if (de) de->file_size = i->i_size;
230 } else if (S_ISDIR(i->i_mode)) {
231 fnode->file_size = 0;
232 if (de) de->file_size = 0;
233 }
234 hpfs_write_inode_ea(i, fnode);
235 if (de) {
236 de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec);
237 de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec);
238 de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec);
239 de->read_only = !(i->i_mode & 0222);
240 de->ea_size = hpfs_inode->i_ea_size;
241 hpfs_mark_4buffers_dirty(&qbh);
242 hpfs_brelse4(&qbh);
243 }
244 if (S_ISDIR(i->i_mode)) {
245 if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) {
246 de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec);
247 de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec);
248 de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec);
249 de->read_only = !(i->i_mode & 0222);
250 de->ea_size = 0;
251 de->file_size = 0;
252 hpfs_mark_4buffers_dirty(&qbh);
253 hpfs_brelse4(&qbh);
254 } else
255 hpfs_error(i->i_sb,
256 "directory %08lx doesn't have '.' entry",
257 (unsigned long)i->i_ino);
258 }
259 mark_buffer_dirty(bh);
260 brelse(bh);
261}
262
263int hpfs_notify_change(struct dentry *dentry, struct iattr *attr)
264{
265 struct inode *inode = dentry->d_inode;
266 int error=0;
267 lock_kernel();
268 if ( ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) ||
269 (hpfs_sb(inode->i_sb)->sb_root == inode->i_ino) ) {
270 error = -EINVAL;
271 } else if ((error = inode_change_ok(inode, attr))) {
272 } else if ((error = inode_setattr(inode, attr))) {
273 } else {
274 hpfs_write_inode(inode);
275 }
276 unlock_kernel();
277 return error;
278}
279
280void hpfs_write_if_changed(struct inode *inode)
281{
282 struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
283
284 if (hpfs_inode->i_dirty)
285 hpfs_write_inode(inode);
286}
287
288void hpfs_delete_inode(struct inode *inode)
289{
290 truncate_inode_pages(&inode->i_data, 0);
291 lock_kernel();
292 hpfs_remove_fnode(inode->i_sb, inode->i_ino);
293 unlock_kernel();
294 clear_inode(inode);
295}
296
