mm: Remove slab destructors from kmem_cache_create().
[linux-2.6.git] / fs / hpfs / inode.c
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
9 #include "hpfs_fn.h"
10
11 void 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
42 void 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                 /*i->i_mode |= S_IFREG;
53                 i->i_mode &= ~0111;
54                 i->i_op = &hpfs_file_iops;
55                 i->i_fop = &hpfs_file_ops;
56                 i->i_nlink = 0;*/
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
143 static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode)
144 {
145         struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
146         /*if (fnode->acl_size_l || fnode->acl_size_s) {
147                    Some unknown structures like ACL may be in fnode,
148                    we'd better not overwrite them
149                 hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 stuctures", i->i_ino);
150         } else*/ 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                                 /* sick, but legal */
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
179 void 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
212 void 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 = /*hpfs_inode->i_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
263 int 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
280 void 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
288 void 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 }