1
2
3
4
5
6
7
8
9#include <linux/sched.h>
10#include <linux/smp_lock.h>
11#include "hpfs_fn.h"
12
13static struct file_operations hpfs_file_ops =
14{
15 llseek: generic_file_llseek,
16 read: generic_file_read,
17 write: hpfs_file_write,
18 mmap: generic_file_mmap,
19 open: hpfs_open,
20 release: hpfs_file_release,
21 fsync: hpfs_file_fsync,
22};
23
24static struct inode_operations hpfs_file_iops =
25{
26 truncate: hpfs_truncate,
27 setattr: hpfs_notify_change,
28};
29
30static struct file_operations hpfs_dir_ops =
31{
32 llseek: hpfs_dir_lseek,
33 read: generic_read_dir,
34 readdir: hpfs_readdir,
35 open: hpfs_open,
36 release: hpfs_dir_release,
37 fsync: hpfs_file_fsync,
38};
39
40static struct inode_operations hpfs_dir_iops =
41{
42 create: hpfs_create,
43 lookup: hpfs_lookup,
44 unlink: hpfs_unlink,
45 symlink: hpfs_symlink,
46 mkdir: hpfs_mkdir,
47 rmdir: hpfs_rmdir,
48 mknod: hpfs_mknod,
49 rename: hpfs_rename,
50 setattr: hpfs_notify_change,
51};
52
53struct address_space_operations hpfs_symlink_aops = {
54 readpage: hpfs_symlink_readpage
55};
56
57void hpfs_read_inode(struct inode *i)
58{
59 struct buffer_head *bh;
60 struct fnode *fnode;
61 struct super_block *sb = i->i_sb;
62 unsigned char *ea;
63 int ea_size;
64 init_MUTEX(&i->i_hpfs_sem);
65 i->i_uid = sb->s_hpfs_uid;
66 i->i_gid = sb->s_hpfs_gid;
67 i->i_mode = sb->s_hpfs_mode;
68 i->i_hpfs_conv = sb->s_hpfs_conv;
69 i->i_blksize = 512;
70 i->i_size = -1;
71 i->i_blocks = -1;
72
73 i->i_hpfs_dno = 0;
74 i->i_hpfs_n_secs = 0;
75 i->i_hpfs_file_sec = 0;
76 i->i_hpfs_disk_sec = 0;
77 i->i_hpfs_dpos = 0;
78 i->i_hpfs_dsubdno = 0;
79 i->i_hpfs_ea_mode = 0;
80 i->i_hpfs_ea_uid = 0;
81 i->i_hpfs_ea_gid = 0;
82 i->i_hpfs_ea_size = 0;
83 i->i_version = ++event;
84
85 i->i_hpfs_rddir_off = NULL;
86 i->i_hpfs_dirty = 0;
87
88 i->i_atime = 0;
89 i->i_mtime = 0;
90 i->i_ctime = 0;
91
92 if (!i->i_sb->s_hpfs_rd_inode)
93 hpfs_error(i->i_sb, "read_inode: s_hpfs_rd_inode == 0");
94 if (i->i_sb->s_hpfs_rd_inode == 2) {
95 i->i_mode |= S_IFREG;
96 i->i_mode &= ~0111;
97 i->i_op = &hpfs_file_iops;
98 i->i_fop = &hpfs_file_ops;
99 i->i_nlink = 1;
100 return;
101 }
102 if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
103
104
105
106
107
108 make_bad_inode(i);
109 return;
110 }
111 if (i->i_sb->s_hpfs_eas) {
112 if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
113 if (ea_size == 2) {
114 i->i_uid = ea[0] + (ea[1] << 8);
115 i->i_hpfs_ea_uid = 1;
116 }
117 kfree(ea);
118 }
119 if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
120 if (ea_size == 2) {
121 i->i_gid = ea[0] + (ea[1] << 8);
122 i->i_hpfs_ea_gid = 1;
123 }
124 kfree(ea);
125 }
126 if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) {
127 kfree(ea);
128 i->i_mode = S_IFLNK | 0777;
129 i->i_op = &page_symlink_inode_operations;
130 i->i_data.a_ops = &hpfs_symlink_aops;
131 i->i_nlink = 1;
132 i->i_size = ea_size;
133 i->i_blocks = 1;
134 brelse(bh);
135 return;
136 }
137 if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) {
138 int rdev = 0;
139 umode_t mode = sb->s_hpfs_mode;
140 if (ea_size == 2) {
141 mode = ea[0] + (ea[1] << 8);
142 i->i_hpfs_ea_mode = 1;
143 }
144 kfree(ea);
145 i->i_mode = mode;
146 if (S_ISBLK(mode) || S_ISCHR(mode)) {
147 if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) {
148 if (ea_size == 4)
149 rdev = ea[0] + (ea[1] << 8) + (ea[2] << 16) + (ea[3] << 24);
150 kfree(ea);
151 }
152 }
153 if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
154 brelse(bh);
155 i->i_nlink = 1;
156 i->i_size = 0;
157 i->i_blocks = 1;
158 init_special_inode(i, mode, rdev);
159 return;
160 }
161 }
162 }
163 if (fnode->dirflag) {
164 unsigned n_dnodes, n_subdirs;
165 i->i_mode |= S_IFDIR;
166 i->i_op = &hpfs_dir_iops;
167 i->i_fop = &hpfs_dir_ops;
168 i->i_hpfs_parent_dir = fnode->up;
169 i->i_hpfs_dno = fnode->u.external[0].disk_secno;
170 if (sb->s_hpfs_chk >= 2) {
171 struct buffer_head *bh0;
172 if (hpfs_map_fnode(sb, i->i_hpfs_parent_dir, &bh0)) brelse(bh0);
173 }
174 n_dnodes = 0; n_subdirs = 0;
175 hpfs_count_dnodes(i->i_sb, i->i_hpfs_dno, &n_dnodes, &n_subdirs, NULL);
176 i->i_blocks = 4 * n_dnodes;
177 i->i_size = 2048 * n_dnodes;
178 i->i_nlink = 2 + n_subdirs;
179 } else {
180 i->i_mode |= S_IFREG;
181 if (!i->i_hpfs_ea_mode) i->i_mode &= ~0111;
182 i->i_op = &hpfs_file_iops;
183 i->i_fop = &hpfs_file_ops;
184 i->i_nlink = 1;
185 i->i_size = fnode->file_size;
186 i->i_blocks = ((i->i_size + 511) >> 9) + 1;
187 i->i_data.a_ops = &hpfs_aops;
188 i->u.hpfs_i.mmu_private = i->i_size;
189 }
190 brelse(bh);
191}
192
193void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode)
194{
195
196
197
198
199 if (i->i_sb->s_hpfs_eas >= 2) {
200 unsigned char ea[4];
201 if ((i->i_uid != i->i_sb->s_hpfs_uid) || i->i_hpfs_ea_uid) {
202 ea[0] = i->i_uid & 0xff;
203 ea[1] = i->i_uid >> 8;
204 hpfs_set_ea(i, fnode, "UID", ea, 2);
205 i->i_hpfs_ea_uid = 1;
206 }
207 if ((i->i_gid != i->i_sb->s_hpfs_gid) || i->i_hpfs_ea_gid) {
208 ea[0] = i->i_gid & 0xff;
209 ea[1] = i->i_gid >> 8;
210 hpfs_set_ea(i, fnode, "GID", ea, 2);
211 i->i_hpfs_ea_gid = 1;
212 }
213 if (!S_ISLNK(i->i_mode))
214 if ((i->i_mode != ((i->i_sb->s_hpfs_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111))
215 | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))
216 && i->i_mode != ((i->i_sb->s_hpfs_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333))
217 | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || i->i_hpfs_ea_mode) {
218 ea[0] = i->i_mode & 0xff;
219 ea[1] = i->i_mode >> 8;
220 hpfs_set_ea(i, fnode, "MODE", ea, 2);
221 i->i_hpfs_ea_mode = 1;
222 }
223 if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) {
224 int d = kdev_t_to_nr(i->i_rdev);
225 ea[0] = d & 0xff;
226 ea[1] = (d >> 8) & 0xff;
227 ea[2] = (d >> 16) & 0xff;
228 ea[3] = d >> 24;
229 hpfs_set_ea(i, fnode, "DEV", ea, 4);
230 }
231 }
232}
233
234void hpfs_write_inode(struct inode *i)
235{
236 struct inode *parent;
237 if (!i->i_nlink) return;
238 if (i->i_ino == i->i_sb->s_hpfs_root) return;
239 if (i->i_hpfs_rddir_off && !atomic_read(&i->i_count)) {
240 if (*i->i_hpfs_rddir_off) printk("HPFS: write_inode: some position still there\n");
241 kfree(i->i_hpfs_rddir_off);
242 i->i_hpfs_rddir_off = NULL;
243 }
244 i->i_hpfs_dirty = 0;
245 hpfs_lock_iget(i->i_sb, 1);
246 parent = iget(i->i_sb, i->i_hpfs_parent_dir);
247 hpfs_unlock_iget(i->i_sb);
248 hpfs_lock_inode(parent);
249 hpfs_write_inode_nolock(i);
250 hpfs_unlock_inode(parent);
251 iput(parent);
252}
253
254void hpfs_write_inode_nolock(struct inode *i)
255{
256 struct buffer_head *bh;
257 struct fnode *fnode;
258 struct quad_buffer_head qbh;
259 struct hpfs_dirent *de;
260 if (i->i_ino == i->i_sb->s_hpfs_root) return;
261 if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
262 if (i->i_ino != i->i_sb->s_hpfs_root && i->i_nlink) {
263 if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) {
264 brelse(bh);
265 return;
266 }
267 } else de = NULL;
268 if (S_ISREG(i->i_mode)) {
269 fnode->file_size = i->i_size;
270 if (de) de->file_size = i->i_size;
271 } else if (S_ISDIR(i->i_mode)) {
272 fnode->file_size = 0;
273 if (de) de->file_size = 0;
274 }
275 hpfs_write_inode_ea(i, fnode);
276 if (de) {
277 de->write_date = gmt_to_local(i->i_sb, i->i_mtime);
278 de->read_date = gmt_to_local(i->i_sb, i->i_atime);
279 de->creation_date = gmt_to_local(i->i_sb, i->i_ctime);
280 de->read_only = !(i->i_mode & 0222);
281 de->ea_size = i->i_hpfs_ea_size;
282 hpfs_mark_4buffers_dirty(&qbh);
283 hpfs_brelse4(&qbh);
284 }
285 if (S_ISDIR(i->i_mode)) {
286 if ((de = map_dirent(i, i->i_hpfs_dno, "\001\001", 2, NULL, &qbh))) {
287 de->write_date = gmt_to_local(i->i_sb, i->i_mtime);
288 de->read_date = gmt_to_local(i->i_sb, i->i_atime);
289 de->creation_date = gmt_to_local(i->i_sb, i->i_ctime);
290 de->read_only = !(i->i_mode & 0222);
291 de->ea_size = 0;
292 de->file_size = 0;
293 hpfs_mark_4buffers_dirty(&qbh);
294 hpfs_brelse4(&qbh);
295 } else hpfs_error(i->i_sb, "directory %08x doesn't have '.' entry", i->i_ino);
296 }
297 mark_buffer_dirty(bh);
298 brelse(bh);
299}
300
301int hpfs_notify_change(struct dentry *dentry, struct iattr *attr)
302{
303 struct inode *inode = dentry->d_inode;
304 int error;
305 if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
306 return -EINVAL;
307 if (inode->i_sb->s_hpfs_root == inode->i_ino) return -EINVAL;
308 if ((error = inode_change_ok(inode, attr))) return error;
309 error = inode_setattr(inode, attr);
310 if (error) return error;
311 hpfs_write_inode(inode);
312 return 0;
313}
314
315void hpfs_write_if_changed(struct inode *inode)
316{
317 if (inode->i_hpfs_dirty) {
318 hpfs_write_inode(inode);
319 }
320}
321
322void hpfs_delete_inode(struct inode *inode)
323{
324 lock_kernel();
325 hpfs_remove_fnode(inode->i_sb, inode->i_ino);
326 unlock_kernel();
327 clear_inode(inode);
328}
329
