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TOMOYO Linux Cross Reference
Linux/fs/hpfs/namei.c

Version: ~ [ linux-5.3-rc5 ] ~ [ linux-5.2.9 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.67 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.139 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.189 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.189 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.72 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *  linux/fs/hpfs/namei.c
  3  *
  4  *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
  5  *
  6  *  adding & removing files & directories
  7  */
  8 #include <linux/sched.h>
  9 #include "hpfs_fn.h"
 10 
 11 static void hpfs_update_directory_times(struct inode *dir)
 12 {
 13         time_t t = get_seconds();
 14         if (t == dir->i_mtime.tv_sec &&
 15             t == dir->i_ctime.tv_sec)
 16                 return;
 17         dir->i_mtime.tv_sec = dir->i_ctime.tv_sec = t;
 18         dir->i_mtime.tv_nsec = dir->i_ctime.tv_nsec = 0;
 19         hpfs_write_inode_nolock(dir);
 20 }
 21 
 22 static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 23 {
 24         const unsigned char *name = dentry->d_name.name;
 25         unsigned len = dentry->d_name.len;
 26         struct quad_buffer_head qbh0;
 27         struct buffer_head *bh;
 28         struct hpfs_dirent *de;
 29         struct fnode *fnode;
 30         struct dnode *dnode;
 31         struct inode *result;
 32         fnode_secno fno;
 33         dnode_secno dno;
 34         int r;
 35         struct hpfs_dirent dee;
 36         int err;
 37         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
 38         hpfs_lock(dir->i_sb);
 39         err = -ENOSPC;
 40         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
 41         if (!fnode)
 42                 goto bail;
 43         dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0);
 44         if (!dnode)
 45                 goto bail1;
 46         memset(&dee, 0, sizeof dee);
 47         dee.directory = 1;
 48         if (!(mode & 0222)) dee.read_only = 1;
 49         /*dee.archive = 0;*/
 50         dee.hidden = name[0] == '.';
 51         dee.fnode = cpu_to_le32(fno);
 52         dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
 53         result = new_inode(dir->i_sb);
 54         if (!result)
 55                 goto bail2;
 56         hpfs_init_inode(result);
 57         result->i_ino = fno;
 58         hpfs_i(result)->i_parent_dir = dir->i_ino;
 59         hpfs_i(result)->i_dno = dno;
 60         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
 61         result->i_ctime.tv_nsec = 0; 
 62         result->i_mtime.tv_nsec = 0; 
 63         result->i_atime.tv_nsec = 0; 
 64         hpfs_i(result)->i_ea_size = 0;
 65         result->i_mode |= S_IFDIR;
 66         result->i_op = &hpfs_dir_iops;
 67         result->i_fop = &hpfs_dir_ops;
 68         result->i_blocks = 4;
 69         result->i_size = 2048;
 70         set_nlink(result, 2);
 71         if (dee.read_only)
 72                 result->i_mode &= ~0222;
 73 
 74         r = hpfs_add_dirent(dir, name, len, &dee);
 75         if (r == 1)
 76                 goto bail3;
 77         if (r == -1) {
 78                 err = -EEXIST;
 79                 goto bail3;
 80         }
 81         fnode->len = len;
 82         memcpy(fnode->name, name, len > 15 ? 15 : len);
 83         fnode->up = cpu_to_le32(dir->i_ino);
 84         fnode->flags |= FNODE_dir;
 85         fnode->btree.n_free_nodes = 7;
 86         fnode->btree.n_used_nodes = 1;
 87         fnode->btree.first_free = cpu_to_le16(0x14);
 88         fnode->u.external[0].disk_secno = cpu_to_le32(dno);
 89         fnode->u.external[0].file_secno = cpu_to_le32(-1);
 90         dnode->root_dnode = 1;
 91         dnode->up = cpu_to_le32(fno);
 92         de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);
 93         de->creation_date = de->write_date = de->read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
 94         if (!(mode & 0222)) de->read_only = 1;
 95         de->first = de->directory = 1;
 96         /*de->hidden = de->system = 0;*/
 97         de->fnode = cpu_to_le32(fno);
 98         mark_buffer_dirty(bh);
 99         brelse(bh);
100         hpfs_mark_4buffers_dirty(&qbh0);
101         hpfs_brelse4(&qbh0);
102         inc_nlink(dir);
103         insert_inode_hash(result);
104 
105         if (!uid_eq(result->i_uid, current_fsuid()) ||
106             !gid_eq(result->i_gid, current_fsgid()) ||
107             result->i_mode != (mode | S_IFDIR)) {
108                 result->i_uid = current_fsuid();
109                 result->i_gid = current_fsgid();
110                 result->i_mode = mode | S_IFDIR;
111                 hpfs_write_inode_nolock(result);
112         }
113         hpfs_update_directory_times(dir);
114         d_instantiate(dentry, result);
115         hpfs_unlock(dir->i_sb);
116         return 0;
117 bail3:
118         iput(result);
119 bail2:
120         hpfs_brelse4(&qbh0);
121         hpfs_free_dnode(dir->i_sb, dno);
122 bail1:
123         brelse(bh);
124         hpfs_free_sectors(dir->i_sb, fno, 1);
125 bail:
126         hpfs_unlock(dir->i_sb);
127         return err;
128 }
129 
130 static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
131 {
132         const unsigned char *name = dentry->d_name.name;
133         unsigned len = dentry->d_name.len;
134         struct inode *result = NULL;
135         struct buffer_head *bh;
136         struct fnode *fnode;
137         fnode_secno fno;
138         int r;
139         struct hpfs_dirent dee;
140         int err;
141         if ((err = hpfs_chk_name(name, &len)))
142                 return err==-ENOENT ? -EINVAL : err;
143         hpfs_lock(dir->i_sb);
144         err = -ENOSPC;
145         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
146         if (!fnode)
147                 goto bail;
148         memset(&dee, 0, sizeof dee);
149         if (!(mode & 0222)) dee.read_only = 1;
150         dee.archive = 1;
151         dee.hidden = name[0] == '.';
152         dee.fnode = cpu_to_le32(fno);
153         dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
154 
155         result = new_inode(dir->i_sb);
156         if (!result)
157                 goto bail1;
158         
159         hpfs_init_inode(result);
160         result->i_ino = fno;
161         result->i_mode |= S_IFREG;
162         result->i_mode &= ~0111;
163         result->i_op = &hpfs_file_iops;
164         result->i_fop = &hpfs_file_ops;
165         set_nlink(result, 1);
166         hpfs_i(result)->i_parent_dir = dir->i_ino;
167         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
168         result->i_ctime.tv_nsec = 0;
169         result->i_mtime.tv_nsec = 0;
170         result->i_atime.tv_nsec = 0;
171         hpfs_i(result)->i_ea_size = 0;
172         if (dee.read_only)
173                 result->i_mode &= ~0222;
174         result->i_blocks = 1;
175         result->i_size = 0;
176         result->i_data.a_ops = &hpfs_aops;
177         hpfs_i(result)->mmu_private = 0;
178 
179         r = hpfs_add_dirent(dir, name, len, &dee);
180         if (r == 1)
181                 goto bail2;
182         if (r == -1) {
183                 err = -EEXIST;
184                 goto bail2;
185         }
186         fnode->len = len;
187         memcpy(fnode->name, name, len > 15 ? 15 : len);
188         fnode->up = cpu_to_le32(dir->i_ino);
189         mark_buffer_dirty(bh);
190         brelse(bh);
191 
192         insert_inode_hash(result);
193 
194         if (!uid_eq(result->i_uid, current_fsuid()) ||
195             !gid_eq(result->i_gid, current_fsgid()) ||
196             result->i_mode != (mode | S_IFREG)) {
197                 result->i_uid = current_fsuid();
198                 result->i_gid = current_fsgid();
199                 result->i_mode = mode | S_IFREG;
200                 hpfs_write_inode_nolock(result);
201         }
202         hpfs_update_directory_times(dir);
203         d_instantiate(dentry, result);
204         hpfs_unlock(dir->i_sb);
205         return 0;
206 
207 bail2:
208         iput(result);
209 bail1:
210         brelse(bh);
211         hpfs_free_sectors(dir->i_sb, fno, 1);
212 bail:
213         hpfs_unlock(dir->i_sb);
214         return err;
215 }
216 
217 static int hpfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
218 {
219         const unsigned char *name = dentry->d_name.name;
220         unsigned len = dentry->d_name.len;
221         struct buffer_head *bh;
222         struct fnode *fnode;
223         fnode_secno fno;
224         int r;
225         struct hpfs_dirent dee;
226         struct inode *result = NULL;
227         int err;
228         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
229         if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
230         if (!new_valid_dev(rdev))
231                 return -EINVAL;
232         hpfs_lock(dir->i_sb);
233         err = -ENOSPC;
234         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
235         if (!fnode)
236                 goto bail;
237         memset(&dee, 0, sizeof dee);
238         if (!(mode & 0222)) dee.read_only = 1;
239         dee.archive = 1;
240         dee.hidden = name[0] == '.';
241         dee.fnode = cpu_to_le32(fno);
242         dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
243 
244         result = new_inode(dir->i_sb);
245         if (!result)
246                 goto bail1;
247 
248         hpfs_init_inode(result);
249         result->i_ino = fno;
250         hpfs_i(result)->i_parent_dir = dir->i_ino;
251         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
252         result->i_ctime.tv_nsec = 0;
253         result->i_mtime.tv_nsec = 0;
254         result->i_atime.tv_nsec = 0;
255         hpfs_i(result)->i_ea_size = 0;
256         result->i_uid = current_fsuid();
257         result->i_gid = current_fsgid();
258         set_nlink(result, 1);
259         result->i_size = 0;
260         result->i_blocks = 1;
261         init_special_inode(result, mode, rdev);
262 
263         r = hpfs_add_dirent(dir, name, len, &dee);
264         if (r == 1)
265                 goto bail2;
266         if (r == -1) {
267                 err = -EEXIST;
268                 goto bail2;
269         }
270         fnode->len = len;
271         memcpy(fnode->name, name, len > 15 ? 15 : len);
272         fnode->up = cpu_to_le32(dir->i_ino);
273         mark_buffer_dirty(bh);
274 
275         insert_inode_hash(result);
276 
277         hpfs_write_inode_nolock(result);
278         hpfs_update_directory_times(dir);
279         d_instantiate(dentry, result);
280         brelse(bh);
281         hpfs_unlock(dir->i_sb);
282         return 0;
283 bail2:
284         iput(result);
285 bail1:
286         brelse(bh);
287         hpfs_free_sectors(dir->i_sb, fno, 1);
288 bail:
289         hpfs_unlock(dir->i_sb);
290         return err;
291 }
292 
293 static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
294 {
295         const unsigned char *name = dentry->d_name.name;
296         unsigned len = dentry->d_name.len;
297         struct buffer_head *bh;
298         struct fnode *fnode;
299         fnode_secno fno;
300         int r;
301         struct hpfs_dirent dee;
302         struct inode *result;
303         int err;
304         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
305         hpfs_lock(dir->i_sb);
306         if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
307                 hpfs_unlock(dir->i_sb);
308                 return -EPERM;
309         }
310         err = -ENOSPC;
311         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
312         if (!fnode)
313                 goto bail;
314         memset(&dee, 0, sizeof dee);
315         dee.archive = 1;
316         dee.hidden = name[0] == '.';
317         dee.fnode = cpu_to_le32(fno);
318         dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
319 
320         result = new_inode(dir->i_sb);
321         if (!result)
322                 goto bail1;
323         result->i_ino = fno;
324         hpfs_init_inode(result);
325         hpfs_i(result)->i_parent_dir = dir->i_ino;
326         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
327         result->i_ctime.tv_nsec = 0;
328         result->i_mtime.tv_nsec = 0;
329         result->i_atime.tv_nsec = 0;
330         hpfs_i(result)->i_ea_size = 0;
331         result->i_mode = S_IFLNK | 0777;
332         result->i_uid = current_fsuid();
333         result->i_gid = current_fsgid();
334         result->i_blocks = 1;
335         set_nlink(result, 1);
336         result->i_size = strlen(symlink);
337         result->i_op = &page_symlink_inode_operations;
338         result->i_data.a_ops = &hpfs_symlink_aops;
339 
340         r = hpfs_add_dirent(dir, name, len, &dee);
341         if (r == 1)
342                 goto bail2;
343         if (r == -1) {
344                 err = -EEXIST;
345                 goto bail2;
346         }
347         fnode->len = len;
348         memcpy(fnode->name, name, len > 15 ? 15 : len);
349         fnode->up = cpu_to_le32(dir->i_ino);
350         hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
351         mark_buffer_dirty(bh);
352         brelse(bh);
353 
354         insert_inode_hash(result);
355 
356         hpfs_write_inode_nolock(result);
357         hpfs_update_directory_times(dir);
358         d_instantiate(dentry, result);
359         hpfs_unlock(dir->i_sb);
360         return 0;
361 bail2:
362         iput(result);
363 bail1:
364         brelse(bh);
365         hpfs_free_sectors(dir->i_sb, fno, 1);
366 bail:
367         hpfs_unlock(dir->i_sb);
368         return err;
369 }
370 
371 static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
372 {
373         const unsigned char *name = dentry->d_name.name;
374         unsigned len = dentry->d_name.len;
375         struct quad_buffer_head qbh;
376         struct hpfs_dirent *de;
377         struct inode *inode = d_inode(dentry);
378         dnode_secno dno;
379         int r;
380         int err;
381 
382         hpfs_lock(dir->i_sb);
383         hpfs_adjust_length(name, &len);
384 
385         err = -ENOENT;
386         de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
387         if (!de)
388                 goto out;
389 
390         err = -EPERM;
391         if (de->first)
392                 goto out1;
393 
394         err = -EISDIR;
395         if (de->directory)
396                 goto out1;
397 
398         r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
399         switch (r) {
400         case 1:
401                 hpfs_error(dir->i_sb, "there was error when removing dirent");
402                 err = -EFSERROR;
403                 break;
404         case 2:         /* no space for deleting */
405                 err = -ENOSPC;
406                 break;
407         default:
408                 drop_nlink(inode);
409                 err = 0;
410         }
411         goto out;
412 
413 out1:
414         hpfs_brelse4(&qbh);
415 out:
416         if (!err)
417                 hpfs_update_directory_times(dir);
418         hpfs_unlock(dir->i_sb);
419         return err;
420 }
421 
422 static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
423 {
424         const unsigned char *name = dentry->d_name.name;
425         unsigned len = dentry->d_name.len;
426         struct quad_buffer_head qbh;
427         struct hpfs_dirent *de;
428         struct inode *inode = d_inode(dentry);
429         dnode_secno dno;
430         int n_items = 0;
431         int err;
432         int r;
433 
434         hpfs_adjust_length(name, &len);
435         hpfs_lock(dir->i_sb);
436         err = -ENOENT;
437         de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
438         if (!de)
439                 goto out;
440 
441         err = -EPERM;
442         if (de->first)
443                 goto out1;
444 
445         err = -ENOTDIR;
446         if (!de->directory)
447                 goto out1;
448 
449         hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items);
450         err = -ENOTEMPTY;
451         if (n_items)
452                 goto out1;
453 
454         r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
455         switch (r) {
456         case 1:
457                 hpfs_error(dir->i_sb, "there was error when removing dirent");
458                 err = -EFSERROR;
459                 break;
460         case 2:
461                 err = -ENOSPC;
462                 break;
463         default:
464                 drop_nlink(dir);
465                 clear_nlink(inode);
466                 err = 0;
467         }
468         goto out;
469 out1:
470         hpfs_brelse4(&qbh);
471 out:
472         if (!err)
473                 hpfs_update_directory_times(dir);
474         hpfs_unlock(dir->i_sb);
475         return err;
476 }
477 
478 static int hpfs_symlink_readpage(struct file *file, struct page *page)
479 {
480         char *link = kmap(page);
481         struct inode *i = page->mapping->host;
482         struct fnode *fnode;
483         struct buffer_head *bh;
484         int err;
485 
486         err = -EIO;
487         hpfs_lock(i->i_sb);
488         if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh)))
489                 goto fail;
490         err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE);
491         brelse(bh);
492         if (err)
493                 goto fail;
494         hpfs_unlock(i->i_sb);
495         SetPageUptodate(page);
496         kunmap(page);
497         unlock_page(page);
498         return 0;
499 
500 fail:
501         hpfs_unlock(i->i_sb);
502         SetPageError(page);
503         kunmap(page);
504         unlock_page(page);
505         return err;
506 }
507 
508 const struct address_space_operations hpfs_symlink_aops = {
509         .readpage       = hpfs_symlink_readpage
510 };
511         
512 static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
513                 struct inode *new_dir, struct dentry *new_dentry)
514 {
515         const unsigned char *old_name = old_dentry->d_name.name;
516         unsigned old_len = old_dentry->d_name.len;
517         const unsigned char *new_name = new_dentry->d_name.name;
518         unsigned new_len = new_dentry->d_name.len;
519         struct inode *i = d_inode(old_dentry);
520         struct inode *new_inode = d_inode(new_dentry);
521         struct quad_buffer_head qbh, qbh1;
522         struct hpfs_dirent *dep, *nde;
523         struct hpfs_dirent de;
524         dnode_secno dno;
525         int r;
526         struct buffer_head *bh;
527         struct fnode *fnode;
528         int err;
529 
530         if ((err = hpfs_chk_name(new_name, &new_len))) return err;
531         err = 0;
532         hpfs_adjust_length(old_name, &old_len);
533 
534         hpfs_lock(i->i_sb);
535         /* order doesn't matter, due to VFS exclusion */
536         
537         /* Erm? Moving over the empty non-busy directory is perfectly legal */
538         if (new_inode && S_ISDIR(new_inode->i_mode)) {
539                 err = -EINVAL;
540                 goto end1;
541         }
542 
543         if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
544                 hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
545                 err = -ENOENT;
546                 goto end1;
547         }
548         copy_de(&de, dep);
549         de.hidden = new_name[0] == '.';
550 
551         if (new_inode) {
552                 int r;
553                 if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
554                         if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
555                                 clear_nlink(new_inode);
556                                 copy_de(nde, &de);
557                                 memcpy(nde->name, new_name, new_len);
558                                 hpfs_mark_4buffers_dirty(&qbh1);
559                                 hpfs_brelse4(&qbh1);
560                                 goto end;
561                         }
562                         hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
563                         err = -EFSERROR;
564                         goto end1;
565                 }
566                 err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0;
567                 goto end1;
568         }
569 
570         if (new_dir == old_dir) hpfs_brelse4(&qbh);
571 
572         if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) {
573                 if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
574                 err = r == 1 ? -ENOSPC : -EFSERROR;
575                 if (new_dir != old_dir) hpfs_brelse4(&qbh);
576                 goto end1;
577         }
578         
579         if (new_dir == old_dir)
580                 if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
581                         hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
582                         err = -ENOENT;
583                         goto end1;
584                 }
585 
586         if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
587                 hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
588                 err = r == 2 ? -ENOSPC : -EFSERROR;
589                 goto end1;
590         }
591 
592 end:
593         hpfs_i(i)->i_parent_dir = new_dir->i_ino;
594         if (S_ISDIR(i->i_mode)) {
595                 inc_nlink(new_dir);
596                 drop_nlink(old_dir);
597         }
598         if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
599                 fnode->up = cpu_to_le32(new_dir->i_ino);
600                 fnode->len = new_len;
601                 memcpy(fnode->name, new_name, new_len>15?15:new_len);
602                 if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
603                 mark_buffer_dirty(bh);
604                 brelse(bh);
605         }
606 end1:
607         if (!err) {
608                 hpfs_update_directory_times(old_dir);
609                 hpfs_update_directory_times(new_dir);
610         }
611         hpfs_unlock(i->i_sb);
612         return err;
613 }
614 
615 const struct inode_operations hpfs_dir_iops =
616 {
617         .create         = hpfs_create,
618         .lookup         = hpfs_lookup,
619         .unlink         = hpfs_unlink,
620         .symlink        = hpfs_symlink,
621         .mkdir          = hpfs_mkdir,
622         .rmdir          = hpfs_rmdir,
623         .mknod          = hpfs_mknod,
624         .rename         = hpfs_rename,
625         .setattr        = hpfs_setattr,
626 };
627 

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