Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/hpfs/inode.c | |
3 | * | |
4 | * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 | |
5 | * | |
6 | * inode VFS functions | |
7 | */ | |
8 | ||
405f5571 | 9 | #include <linux/smp_lock.h> |
1da177e4 LT |
10 | #include "hpfs_fn.h" |
11 | ||
12 | void hpfs_init_inode(struct inode *i) | |
13 | { | |
14 | struct super_block *sb = i->i_sb; | |
15 | struct hpfs_inode_info *hpfs_inode = hpfs_i(i); | |
16 | ||
17 | i->i_uid = hpfs_sb(sb)->sb_uid; | |
18 | i->i_gid = hpfs_sb(sb)->sb_gid; | |
19 | i->i_mode = hpfs_sb(sb)->sb_mode; | |
20 | hpfs_inode->i_conv = hpfs_sb(sb)->sb_conv; | |
1da177e4 LT |
21 | i->i_size = -1; |
22 | i->i_blocks = -1; | |
23 | ||
24 | hpfs_inode->i_dno = 0; | |
25 | hpfs_inode->i_n_secs = 0; | |
26 | hpfs_inode->i_file_sec = 0; | |
27 | hpfs_inode->i_disk_sec = 0; | |
28 | hpfs_inode->i_dpos = 0; | |
29 | hpfs_inode->i_dsubdno = 0; | |
30 | hpfs_inode->i_ea_mode = 0; | |
31 | hpfs_inode->i_ea_uid = 0; | |
32 | hpfs_inode->i_ea_gid = 0; | |
33 | hpfs_inode->i_ea_size = 0; | |
34 | ||
35 | hpfs_inode->i_rddir_off = NULL; | |
36 | hpfs_inode->i_dirty = 0; | |
37 | ||
38 | i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0; | |
39 | i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0; | |
40 | i->i_atime.tv_sec = i->i_atime.tv_nsec = 0; | |
41 | } | |
42 | ||
43 | void hpfs_read_inode(struct inode *i) | |
44 | { | |
45 | struct buffer_head *bh; | |
46 | struct fnode *fnode; | |
47 | struct super_block *sb = i->i_sb; | |
48 | struct hpfs_inode_info *hpfs_inode = hpfs_i(i); | |
49 | unsigned char *ea; | |
50 | int ea_size; | |
51 | ||
52 | if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) { | |
53 | /*i->i_mode |= S_IFREG; | |
54 | i->i_mode &= ~0111; | |
55 | i->i_op = &hpfs_file_iops; | |
56 | i->i_fop = &hpfs_file_ops; | |
57 | i->i_nlink = 0;*/ | |
58 | make_bad_inode(i); | |
59 | return; | |
60 | } | |
61 | if (hpfs_sb(i->i_sb)->sb_eas) { | |
62 | if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) { | |
63 | if (ea_size == 2) { | |
2ef10312 | 64 | i->i_uid = le16_to_cpu(*(__le16*)ea); |
1da177e4 LT |
65 | hpfs_inode->i_ea_uid = 1; |
66 | } | |
67 | kfree(ea); | |
68 | } | |
69 | if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) { | |
70 | if (ea_size == 2) { | |
2ef10312 | 71 | i->i_gid = le16_to_cpu(*(__le16*)ea); |
1da177e4 LT |
72 | hpfs_inode->i_ea_gid = 1; |
73 | } | |
74 | kfree(ea); | |
75 | } | |
76 | if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) { | |
77 | kfree(ea); | |
78 | i->i_mode = S_IFLNK | 0777; | |
79 | i->i_op = &page_symlink_inode_operations; | |
80 | i->i_data.a_ops = &hpfs_symlink_aops; | |
81 | i->i_nlink = 1; | |
82 | i->i_size = ea_size; | |
83 | i->i_blocks = 1; | |
84 | brelse(bh); | |
85 | return; | |
86 | } | |
87 | if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) { | |
88 | int rdev = 0; | |
89 | umode_t mode = hpfs_sb(sb)->sb_mode; | |
90 | if (ea_size == 2) { | |
2ef10312 | 91 | mode = le16_to_cpu(*(__le16*)ea); |
1da177e4 LT |
92 | hpfs_inode->i_ea_mode = 1; |
93 | } | |
94 | kfree(ea); | |
95 | i->i_mode = mode; | |
96 | if (S_ISBLK(mode) || S_ISCHR(mode)) { | |
97 | if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) { | |
98 | if (ea_size == 4) | |
2ef10312 | 99 | rdev = le32_to_cpu(*(__le32*)ea); |
1da177e4 LT |
100 | kfree(ea); |
101 | } | |
102 | } | |
103 | if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { | |
104 | brelse(bh); | |
105 | i->i_nlink = 1; | |
106 | i->i_size = 0; | |
107 | i->i_blocks = 1; | |
108 | init_special_inode(i, mode, | |
109 | new_decode_dev(rdev)); | |
110 | return; | |
111 | } | |
112 | } | |
113 | } | |
114 | if (fnode->dirflag) { | |
115 | unsigned n_dnodes, n_subdirs; | |
116 | i->i_mode |= S_IFDIR; | |
117 | i->i_op = &hpfs_dir_iops; | |
118 | i->i_fop = &hpfs_dir_ops; | |
119 | hpfs_inode->i_parent_dir = fnode->up; | |
120 | hpfs_inode->i_dno = fnode->u.external[0].disk_secno; | |
121 | if (hpfs_sb(sb)->sb_chk >= 2) { | |
122 | struct buffer_head *bh0; | |
123 | if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0); | |
124 | } | |
125 | n_dnodes = 0; n_subdirs = 0; | |
126 | hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL); | |
127 | i->i_blocks = 4 * n_dnodes; | |
128 | i->i_size = 2048 * n_dnodes; | |
129 | i->i_nlink = 2 + n_subdirs; | |
130 | } else { | |
131 | i->i_mode |= S_IFREG; | |
132 | if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111; | |
133 | i->i_op = &hpfs_file_iops; | |
134 | i->i_fop = &hpfs_file_ops; | |
135 | i->i_nlink = 1; | |
136 | i->i_size = fnode->file_size; | |
137 | i->i_blocks = ((i->i_size + 511) >> 9) + 1; | |
138 | i->i_data.a_ops = &hpfs_aops; | |
139 | hpfs_i(i)->mmu_private = i->i_size; | |
140 | } | |
141 | brelse(bh); | |
142 | } | |
143 | ||
144 | static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode) | |
145 | { | |
146 | struct hpfs_inode_info *hpfs_inode = hpfs_i(i); | |
147 | /*if (fnode->acl_size_l || fnode->acl_size_s) { | |
148 | Some unknown structures like ACL may be in fnode, | |
149 | we'd better not overwrite them | |
150 | hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 stuctures", i->i_ino); | |
151 | } else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) { | |
2ef10312 | 152 | __le32 ea; |
1da177e4 LT |
153 | if ((i->i_uid != hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) { |
154 | ea = cpu_to_le32(i->i_uid); | |
155 | hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2); | |
156 | hpfs_inode->i_ea_uid = 1; | |
157 | } | |
158 | if ((i->i_gid != hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) { | |
159 | ea = cpu_to_le32(i->i_gid); | |
160 | hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2); | |
161 | hpfs_inode->i_ea_gid = 1; | |
162 | } | |
163 | if (!S_ISLNK(i->i_mode)) | |
164 | if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111)) | |
165 | | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG)) | |
166 | && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333)) | |
167 | | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) { | |
168 | ea = cpu_to_le32(i->i_mode); | |
2ef10312 | 169 | /* sick, but legal */ |
1da177e4 LT |
170 | hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2); |
171 | hpfs_inode->i_ea_mode = 1; | |
172 | } | |
173 | if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) { | |
174 | ea = cpu_to_le32(new_encode_dev(i->i_rdev)); | |
175 | hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4); | |
176 | } | |
177 | } | |
178 | } | |
179 | ||
180 | void hpfs_write_inode(struct inode *i) | |
181 | { | |
182 | struct hpfs_inode_info *hpfs_inode = hpfs_i(i); | |
183 | struct inode *parent; | |
184 | if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; | |
185 | if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) { | |
186 | if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n"); | |
187 | kfree(hpfs_inode->i_rddir_off); | |
188 | hpfs_inode->i_rddir_off = NULL; | |
189 | } | |
7bf6d78d | 190 | mutex_lock(&hpfs_inode->i_parent_mutex); |
1da177e4 | 191 | if (!i->i_nlink) { |
7bf6d78d | 192 | mutex_unlock(&hpfs_inode->i_parent_mutex); |
1da177e4 LT |
193 | return; |
194 | } | |
195 | parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir); | |
196 | if (parent) { | |
197 | hpfs_inode->i_dirty = 0; | |
198 | if (parent->i_state & I_NEW) { | |
199 | hpfs_init_inode(parent); | |
200 | hpfs_read_inode(parent); | |
201 | unlock_new_inode(parent); | |
202 | } | |
7bf6d78d | 203 | mutex_lock(&hpfs_inode->i_mutex); |
1da177e4 | 204 | hpfs_write_inode_nolock(i); |
7bf6d78d | 205 | mutex_unlock(&hpfs_inode->i_mutex); |
1da177e4 LT |
206 | iput(parent); |
207 | } else { | |
208 | mark_inode_dirty(i); | |
209 | } | |
7bf6d78d | 210 | mutex_unlock(&hpfs_inode->i_parent_mutex); |
1da177e4 LT |
211 | } |
212 | ||
213 | void hpfs_write_inode_nolock(struct inode *i) | |
214 | { | |
215 | struct hpfs_inode_info *hpfs_inode = hpfs_i(i); | |
216 | struct buffer_head *bh; | |
217 | struct fnode *fnode; | |
218 | struct quad_buffer_head qbh; | |
219 | struct hpfs_dirent *de; | |
220 | if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; | |
221 | if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return; | |
222 | if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) { | |
223 | if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) { | |
224 | brelse(bh); | |
225 | return; | |
226 | } | |
227 | } else de = NULL; | |
228 | if (S_ISREG(i->i_mode)) { | |
229 | fnode->file_size = i->i_size; | |
230 | if (de) de->file_size = i->i_size; | |
231 | } else if (S_ISDIR(i->i_mode)) { | |
232 | fnode->file_size = 0; | |
233 | if (de) de->file_size = 0; | |
234 | } | |
235 | hpfs_write_inode_ea(i, fnode); | |
236 | if (de) { | |
237 | de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); | |
238 | de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); | |
239 | de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); | |
240 | de->read_only = !(i->i_mode & 0222); | |
241 | de->ea_size = hpfs_inode->i_ea_size; | |
242 | hpfs_mark_4buffers_dirty(&qbh); | |
243 | hpfs_brelse4(&qbh); | |
244 | } | |
245 | if (S_ISDIR(i->i_mode)) { | |
246 | if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) { | |
247 | de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); | |
248 | de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); | |
249 | de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); | |
250 | de->read_only = !(i->i_mode & 0222); | |
251 | de->ea_size = /*hpfs_inode->i_ea_size*/0; | |
252 | de->file_size = 0; | |
253 | hpfs_mark_4buffers_dirty(&qbh); | |
254 | hpfs_brelse4(&qbh); | |
18debbbc RD |
255 | } else |
256 | hpfs_error(i->i_sb, | |
257 | "directory %08lx doesn't have '.' entry", | |
258 | (unsigned long)i->i_ino); | |
1da177e4 LT |
259 | } |
260 | mark_buffer_dirty(bh); | |
261 | brelse(bh); | |
262 | } | |
263 | ||
ca30bc99 | 264 | int hpfs_setattr(struct dentry *dentry, struct iattr *attr) |
1da177e4 LT |
265 | { |
266 | struct inode *inode = dentry->d_inode; | |
ca30bc99 CH |
267 | int error = -EINVAL; |
268 | ||
1da177e4 | 269 | lock_kernel(); |
ca30bc99 CH |
270 | if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root) |
271 | goto out_unlock; | |
272 | if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) | |
273 | goto out_unlock; | |
274 | ||
275 | error = inode_change_ok(inode, attr); | |
276 | if (error) | |
277 | goto out_unlock; | |
278 | ||
279 | error = inode_setattr(inode, attr); | |
280 | if (error) | |
281 | goto out_unlock; | |
282 | ||
283 | hpfs_write_inode(inode); | |
284 | ||
285 | out_unlock: | |
1da177e4 LT |
286 | unlock_kernel(); |
287 | return error; | |
288 | } | |
289 | ||
290 | void hpfs_write_if_changed(struct inode *inode) | |
291 | { | |
292 | struct hpfs_inode_info *hpfs_inode = hpfs_i(inode); | |
293 | ||
294 | if (hpfs_inode->i_dirty) | |
295 | hpfs_write_inode(inode); | |
296 | } | |
297 | ||
298 | void hpfs_delete_inode(struct inode *inode) | |
299 | { | |
fef26658 | 300 | truncate_inode_pages(&inode->i_data, 0); |
1da177e4 LT |
301 | lock_kernel(); |
302 | hpfs_remove_fnode(inode->i_sb, inode->i_ino); | |
303 | unlock_kernel(); | |
304 | clear_inode(inode); | |
305 | } |