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fs: push rcu_barrier() from deactivate_locked_super() to filesystems
[deliverable/linux.git] / fs / ufs / super.c
1 /*
2 * linux/fs/ufs/super.c
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 */
8
9 /* Derived from
10 *
11 * linux/fs/ext2/super.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise Pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/inode.c
21 *
22 * Copyright (C) 1991, 1992 Linus Torvalds
23 *
24 * Big-endian to little-endian byte-swapping/bitmaps by
25 * David S. Miller (davem@caip.rutgers.edu), 1995
26 */
27
28 /*
29 * Inspired by
30 *
31 * linux/fs/ufs/super.c
32 *
33 * Copyright (C) 1996
34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
35 * Laboratory for Computer Science Research Computing Facility
36 * Rutgers, The State University of New Jersey
37 *
38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
39 *
40 * Kernel module support added on 96/04/26 by
41 * Stefan Reinauer <stepan@home.culture.mipt.ru>
42 *
43 * Module usage counts added on 96/04/29 by
44 * Gertjan van Wingerde <gwingerde@gmail.com>
45 *
46 * Clean swab support on 19970406 by
47 * Francois-Rene Rideau <fare@tunes.org>
48 *
49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
52 *
53 * NeXTstep support added on February 5th 1998 by
54 * Niels Kristian Bech Jensen <nkbj@image.dk>.
55 *
56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
57 *
58 * HP/UX hfs filesystem support added by
59 * Martin K. Petersen <mkp@mkp.net>, August 1999
60 *
61 * UFS2 (of FreeBSD 5.x) support added by
62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
63 *
64 * UFS2 write support added by
65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
66 */
67
68
69 #include <linux/exportfs.h>
70 #include <linux/module.h>
71 #include <linux/bitops.h>
72
73 #include <stdarg.h>
74
75 #include <asm/uaccess.h>
76
77 #include <linux/errno.h>
78 #include <linux/fs.h>
79 #include <linux/slab.h>
80 #include <linux/time.h>
81 #include <linux/stat.h>
82 #include <linux/string.h>
83 #include <linux/blkdev.h>
84 #include <linux/init.h>
85 #include <linux/parser.h>
86 #include <linux/buffer_head.h>
87 #include <linux/vfs.h>
88 #include <linux/log2.h>
89 #include <linux/mount.h>
90 #include <linux/seq_file.h>
91
92 #include "ufs_fs.h"
93 #include "ufs.h"
94 #include "swab.h"
95 #include "util.h"
96
97 void lock_ufs(struct super_block *sb)
98 {
99 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
100 struct ufs_sb_info *sbi = UFS_SB(sb);
101
102 mutex_lock(&sbi->mutex);
103 sbi->mutex_owner = current;
104 #endif
105 }
106
107 void unlock_ufs(struct super_block *sb)
108 {
109 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
110 struct ufs_sb_info *sbi = UFS_SB(sb);
111
112 sbi->mutex_owner = NULL;
113 mutex_unlock(&sbi->mutex);
114 #endif
115 }
116
117 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
118 {
119 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
120 struct inode *inode;
121
122 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
123 return ERR_PTR(-ESTALE);
124
125 inode = ufs_iget(sb, ino);
126 if (IS_ERR(inode))
127 return ERR_CAST(inode);
128 if (generation && inode->i_generation != generation) {
129 iput(inode);
130 return ERR_PTR(-ESTALE);
131 }
132 return inode;
133 }
134
135 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
136 int fh_len, int fh_type)
137 {
138 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
139 }
140
141 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
142 int fh_len, int fh_type)
143 {
144 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
145 }
146
147 static struct dentry *ufs_get_parent(struct dentry *child)
148 {
149 struct qstr dot_dot = QSTR_INIT("..", 2);
150 ino_t ino;
151
152 ino = ufs_inode_by_name(child->d_inode, &dot_dot);
153 if (!ino)
154 return ERR_PTR(-ENOENT);
155 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
156 }
157
158 static const struct export_operations ufs_export_ops = {
159 .fh_to_dentry = ufs_fh_to_dentry,
160 .fh_to_parent = ufs_fh_to_parent,
161 .get_parent = ufs_get_parent,
162 };
163
164 #ifdef CONFIG_UFS_DEBUG
165 /*
166 * Print contents of ufs_super_block, useful for debugging
167 */
168 static void ufs_print_super_stuff(struct super_block *sb,
169 struct ufs_super_block_first *usb1,
170 struct ufs_super_block_second *usb2,
171 struct ufs_super_block_third *usb3)
172 {
173 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
174
175 printk("ufs_print_super_stuff\n");
176 printk(" magic: 0x%x\n", magic);
177 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
178 printk(" fs_size: %llu\n", (unsigned long long)
179 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
180 printk(" fs_dsize: %llu\n", (unsigned long long)
181 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
182 printk(" bsize: %u\n",
183 fs32_to_cpu(sb, usb1->fs_bsize));
184 printk(" fsize: %u\n",
185 fs32_to_cpu(sb, usb1->fs_fsize));
186 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
187 printk(" fs_sblockloc: %llu\n", (unsigned long long)
188 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
189 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
190 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
191 printk(" cs_nbfree(No of free blocks): %llu\n",
192 (unsigned long long)
193 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
194 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
195 (unsigned long long)
196 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
197 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
198 (unsigned long long)
199 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
200 printk(KERN_INFO" fs_maxsymlinklen: %u\n",
201 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
202 } else {
203 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
204 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
205 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
206 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
207 printk(" cgoffset: %u\n",
208 fs32_to_cpu(sb, usb1->fs_cgoffset));
209 printk(" ~cgmask: 0x%x\n",
210 ~fs32_to_cpu(sb, usb1->fs_cgmask));
211 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
212 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
213 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
214 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
215 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
216 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
217 printk(" fragshift: %u\n",
218 fs32_to_cpu(sb, usb1->fs_fragshift));
219 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
220 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
221 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
222 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
223 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
224 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
225 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
226 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
227 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
228 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
229 printk(" fstodb: %u\n",
230 fs32_to_cpu(sb, usb1->fs_fsbtodb));
231 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
232 printk(" ndir %u\n",
233 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
234 printk(" nifree %u\n",
235 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
236 printk(" nbfree %u\n",
237 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
238 printk(" nffree %u\n",
239 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
240 }
241 printk("\n");
242 }
243
244 /*
245 * Print contents of ufs_cylinder_group, useful for debugging
246 */
247 static void ufs_print_cylinder_stuff(struct super_block *sb,
248 struct ufs_cylinder_group *cg)
249 {
250 printk("\nufs_print_cylinder_stuff\n");
251 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
252 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
253 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
254 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
255 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
256 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
257 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
258 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
259 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
260 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
261 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
262 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
263 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
264 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
265 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
266 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
267 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
268 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
269 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
270 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
271 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
272 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
273 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
274 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
275 printk(" clustersumoff %u\n",
276 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
277 printk(" clusteroff %u\n",
278 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
279 printk(" nclusterblks %u\n",
280 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
281 printk("\n");
282 }
283 #else
284 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
285 # define ufs_print_cylinder_stuff(sb, cg) /**/
286 #endif /* CONFIG_UFS_DEBUG */
287
288 static const struct super_operations ufs_super_ops;
289
290 static char error_buf[1024];
291
292 void ufs_error (struct super_block * sb, const char * function,
293 const char * fmt, ...)
294 {
295 struct ufs_sb_private_info * uspi;
296 struct ufs_super_block_first * usb1;
297 va_list args;
298
299 uspi = UFS_SB(sb)->s_uspi;
300 usb1 = ubh_get_usb_first(uspi);
301
302 if (!(sb->s_flags & MS_RDONLY)) {
303 usb1->fs_clean = UFS_FSBAD;
304 ubh_mark_buffer_dirty(USPI_UBH(uspi));
305 ufs_mark_sb_dirty(sb);
306 sb->s_flags |= MS_RDONLY;
307 }
308 va_start (args, fmt);
309 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
310 va_end (args);
311 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
312 case UFS_MOUNT_ONERROR_PANIC:
313 panic ("UFS-fs panic (device %s): %s: %s\n",
314 sb->s_id, function, error_buf);
315
316 case UFS_MOUNT_ONERROR_LOCK:
317 case UFS_MOUNT_ONERROR_UMOUNT:
318 case UFS_MOUNT_ONERROR_REPAIR:
319 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
320 sb->s_id, function, error_buf);
321 }
322 }
323
324 void ufs_panic (struct super_block * sb, const char * function,
325 const char * fmt, ...)
326 {
327 struct ufs_sb_private_info * uspi;
328 struct ufs_super_block_first * usb1;
329 va_list args;
330
331 uspi = UFS_SB(sb)->s_uspi;
332 usb1 = ubh_get_usb_first(uspi);
333
334 if (!(sb->s_flags & MS_RDONLY)) {
335 usb1->fs_clean = UFS_FSBAD;
336 ubh_mark_buffer_dirty(USPI_UBH(uspi));
337 ufs_mark_sb_dirty(sb);
338 }
339 va_start (args, fmt);
340 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
341 va_end (args);
342 sb->s_flags |= MS_RDONLY;
343 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
344 sb->s_id, function, error_buf);
345 }
346
347 void ufs_warning (struct super_block * sb, const char * function,
348 const char * fmt, ...)
349 {
350 va_list args;
351
352 va_start (args, fmt);
353 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
354 va_end (args);
355 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
356 sb->s_id, function, error_buf);
357 }
358
359 enum {
360 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
361 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
362 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
363 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
364 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
365 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
366 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
367 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
368 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
369 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
370 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
371 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
372 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
373 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
374 Opt_err
375 };
376
377 static const match_table_t tokens = {
378 {Opt_type_old, "ufstype=old"},
379 {Opt_type_sunx86, "ufstype=sunx86"},
380 {Opt_type_sun, "ufstype=sun"},
381 {Opt_type_sunos, "ufstype=sunos"},
382 {Opt_type_44bsd, "ufstype=44bsd"},
383 {Opt_type_ufs2, "ufstype=ufs2"},
384 {Opt_type_ufs2, "ufstype=5xbsd"},
385 {Opt_type_hp, "ufstype=hp"},
386 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
387 {Opt_type_nextstep, "ufstype=nextstep"},
388 {Opt_type_openstep, "ufstype=openstep"},
389 /*end of possible ufs types */
390 {Opt_onerror_panic, "onerror=panic"},
391 {Opt_onerror_lock, "onerror=lock"},
392 {Opt_onerror_umount, "onerror=umount"},
393 {Opt_onerror_repair, "onerror=repair"},
394 {Opt_err, NULL}
395 };
396
397 static int ufs_parse_options (char * options, unsigned * mount_options)
398 {
399 char * p;
400
401 UFSD("ENTER\n");
402
403 if (!options)
404 return 1;
405
406 while ((p = strsep(&options, ",")) != NULL) {
407 substring_t args[MAX_OPT_ARGS];
408 int token;
409 if (!*p)
410 continue;
411
412 token = match_token(p, tokens, args);
413 switch (token) {
414 case Opt_type_old:
415 ufs_clear_opt (*mount_options, UFSTYPE);
416 ufs_set_opt (*mount_options, UFSTYPE_OLD);
417 break;
418 case Opt_type_sunx86:
419 ufs_clear_opt (*mount_options, UFSTYPE);
420 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
421 break;
422 case Opt_type_sun:
423 ufs_clear_opt (*mount_options, UFSTYPE);
424 ufs_set_opt (*mount_options, UFSTYPE_SUN);
425 break;
426 case Opt_type_sunos:
427 ufs_clear_opt(*mount_options, UFSTYPE);
428 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
429 break;
430 case Opt_type_44bsd:
431 ufs_clear_opt (*mount_options, UFSTYPE);
432 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
433 break;
434 case Opt_type_ufs2:
435 ufs_clear_opt(*mount_options, UFSTYPE);
436 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
437 break;
438 case Opt_type_hp:
439 ufs_clear_opt (*mount_options, UFSTYPE);
440 ufs_set_opt (*mount_options, UFSTYPE_HP);
441 break;
442 case Opt_type_nextstepcd:
443 ufs_clear_opt (*mount_options, UFSTYPE);
444 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
445 break;
446 case Opt_type_nextstep:
447 ufs_clear_opt (*mount_options, UFSTYPE);
448 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
449 break;
450 case Opt_type_openstep:
451 ufs_clear_opt (*mount_options, UFSTYPE);
452 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
453 break;
454 case Opt_onerror_panic:
455 ufs_clear_opt (*mount_options, ONERROR);
456 ufs_set_opt (*mount_options, ONERROR_PANIC);
457 break;
458 case Opt_onerror_lock:
459 ufs_clear_opt (*mount_options, ONERROR);
460 ufs_set_opt (*mount_options, ONERROR_LOCK);
461 break;
462 case Opt_onerror_umount:
463 ufs_clear_opt (*mount_options, ONERROR);
464 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
465 break;
466 case Opt_onerror_repair:
467 printk("UFS-fs: Unable to do repair on error, "
468 "will lock lock instead\n");
469 ufs_clear_opt (*mount_options, ONERROR);
470 ufs_set_opt (*mount_options, ONERROR_REPAIR);
471 break;
472 default:
473 printk("UFS-fs: Invalid option: \"%s\" "
474 "or missing value\n", p);
475 return 0;
476 }
477 }
478 return 1;
479 }
480
481 /*
482 * Different types of UFS hold fs_cstotal in different
483 * places, and use different data structure for it.
484 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
485 */
486 static void ufs_setup_cstotal(struct super_block *sb)
487 {
488 struct ufs_sb_info *sbi = UFS_SB(sb);
489 struct ufs_sb_private_info *uspi = sbi->s_uspi;
490 struct ufs_super_block_first *usb1;
491 struct ufs_super_block_second *usb2;
492 struct ufs_super_block_third *usb3;
493 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
494
495 UFSD("ENTER, mtype=%u\n", mtype);
496 usb1 = ubh_get_usb_first(uspi);
497 usb2 = ubh_get_usb_second(uspi);
498 usb3 = ubh_get_usb_third(uspi);
499
500 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
501 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
502 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
503 /*we have statistic in different place, then usual*/
504 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
505 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
506 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
507 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
508 } else {
509 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
510 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
511 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
512 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
513 }
514 UFSD("EXIT\n");
515 }
516
517 /*
518 * Read on-disk structures associated with cylinder groups
519 */
520 static int ufs_read_cylinder_structures(struct super_block *sb)
521 {
522 struct ufs_sb_info *sbi = UFS_SB(sb);
523 struct ufs_sb_private_info *uspi = sbi->s_uspi;
524 struct ufs_buffer_head * ubh;
525 unsigned char * base, * space;
526 unsigned size, blks, i;
527 struct ufs_super_block_third *usb3;
528
529 UFSD("ENTER\n");
530
531 usb3 = ubh_get_usb_third(uspi);
532 /*
533 * Read cs structures from (usually) first data block
534 * on the device.
535 */
536 size = uspi->s_cssize;
537 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
538 base = space = kmalloc(size, GFP_NOFS);
539 if (!base)
540 goto failed;
541 sbi->s_csp = (struct ufs_csum *)space;
542 for (i = 0; i < blks; i += uspi->s_fpb) {
543 size = uspi->s_bsize;
544 if (i + uspi->s_fpb > blks)
545 size = (blks - i) * uspi->s_fsize;
546
547 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
548
549 if (!ubh)
550 goto failed;
551
552 ubh_ubhcpymem (space, ubh, size);
553
554 space += size;
555 ubh_brelse (ubh);
556 ubh = NULL;
557 }
558
559 /*
560 * Read cylinder group (we read only first fragment from block
561 * at this time) and prepare internal data structures for cg caching.
562 */
563 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
564 goto failed;
565 for (i = 0; i < uspi->s_ncg; i++)
566 sbi->s_ucg[i] = NULL;
567 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
568 sbi->s_ucpi[i] = NULL;
569 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
570 }
571 for (i = 0; i < uspi->s_ncg; i++) {
572 UFSD("read cg %u\n", i);
573 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
574 goto failed;
575 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
576 goto failed;
577
578 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
579 }
580 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
581 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
582 goto failed;
583 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
584 }
585 sbi->s_cg_loaded = 0;
586 UFSD("EXIT\n");
587 return 1;
588
589 failed:
590 kfree (base);
591 if (sbi->s_ucg) {
592 for (i = 0; i < uspi->s_ncg; i++)
593 if (sbi->s_ucg[i])
594 brelse (sbi->s_ucg[i]);
595 kfree (sbi->s_ucg);
596 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
597 kfree (sbi->s_ucpi[i]);
598 }
599 UFSD("EXIT (FAILED)\n");
600 return 0;
601 }
602
603 /*
604 * Sync our internal copy of fs_cstotal with disk
605 */
606 static void ufs_put_cstotal(struct super_block *sb)
607 {
608 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
609 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
610 struct ufs_super_block_first *usb1;
611 struct ufs_super_block_second *usb2;
612 struct ufs_super_block_third *usb3;
613
614 UFSD("ENTER\n");
615 usb1 = ubh_get_usb_first(uspi);
616 usb2 = ubh_get_usb_second(uspi);
617 usb3 = ubh_get_usb_third(uspi);
618
619 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
620 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
621 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
622 /*we have statistic in different place, then usual*/
623 usb2->fs_un.fs_u2.cs_ndir =
624 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
625 usb2->fs_un.fs_u2.cs_nbfree =
626 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
627 usb3->fs_un1.fs_u2.cs_nifree =
628 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
629 usb3->fs_un1.fs_u2.cs_nffree =
630 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
631 } else {
632 usb1->fs_cstotal.cs_ndir =
633 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
634 usb1->fs_cstotal.cs_nbfree =
635 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
636 usb1->fs_cstotal.cs_nifree =
637 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
638 usb1->fs_cstotal.cs_nffree =
639 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
640 }
641 ubh_mark_buffer_dirty(USPI_UBH(uspi));
642 ufs_print_super_stuff(sb, usb1, usb2, usb3);
643 UFSD("EXIT\n");
644 }
645
646 /**
647 * ufs_put_super_internal() - put on-disk intrenal structures
648 * @sb: pointer to super_block structure
649 * Put on-disk structures associated with cylinder groups
650 * and write them back to disk, also update cs_total on disk
651 */
652 static void ufs_put_super_internal(struct super_block *sb)
653 {
654 struct ufs_sb_info *sbi = UFS_SB(sb);
655 struct ufs_sb_private_info *uspi = sbi->s_uspi;
656 struct ufs_buffer_head * ubh;
657 unsigned char * base, * space;
658 unsigned blks, size, i;
659
660
661 UFSD("ENTER\n");
662
663 ufs_put_cstotal(sb);
664 size = uspi->s_cssize;
665 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
666 base = space = (char*) sbi->s_csp;
667 for (i = 0; i < blks; i += uspi->s_fpb) {
668 size = uspi->s_bsize;
669 if (i + uspi->s_fpb > blks)
670 size = (blks - i) * uspi->s_fsize;
671
672 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
673
674 ubh_memcpyubh (ubh, space, size);
675 space += size;
676 ubh_mark_buffer_uptodate (ubh, 1);
677 ubh_mark_buffer_dirty (ubh);
678 ubh_brelse (ubh);
679 }
680 for (i = 0; i < sbi->s_cg_loaded; i++) {
681 ufs_put_cylinder (sb, i);
682 kfree (sbi->s_ucpi[i]);
683 }
684 for (; i < UFS_MAX_GROUP_LOADED; i++)
685 kfree (sbi->s_ucpi[i]);
686 for (i = 0; i < uspi->s_ncg; i++)
687 brelse (sbi->s_ucg[i]);
688 kfree (sbi->s_ucg);
689 kfree (base);
690
691 UFSD("EXIT\n");
692 }
693
694 static int ufs_sync_fs(struct super_block *sb, int wait)
695 {
696 struct ufs_sb_private_info * uspi;
697 struct ufs_super_block_first * usb1;
698 struct ufs_super_block_third * usb3;
699 unsigned flags;
700
701 lock_ufs(sb);
702 lock_super(sb);
703
704 UFSD("ENTER\n");
705
706 flags = UFS_SB(sb)->s_flags;
707 uspi = UFS_SB(sb)->s_uspi;
708 usb1 = ubh_get_usb_first(uspi);
709 usb3 = ubh_get_usb_third(uspi);
710
711 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
712 if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
713 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
714 (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
715 ufs_set_fs_state(sb, usb1, usb3,
716 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
717 ufs_put_cstotal(sb);
718
719 UFSD("EXIT\n");
720 unlock_super(sb);
721 unlock_ufs(sb);
722
723 return 0;
724 }
725
726 static void delayed_sync_fs(struct work_struct *work)
727 {
728 struct ufs_sb_info *sbi;
729
730 sbi = container_of(work, struct ufs_sb_info, sync_work.work);
731
732 spin_lock(&sbi->work_lock);
733 sbi->work_queued = 0;
734 spin_unlock(&sbi->work_lock);
735
736 ufs_sync_fs(sbi->sb, 1);
737 }
738
739 void ufs_mark_sb_dirty(struct super_block *sb)
740 {
741 struct ufs_sb_info *sbi = UFS_SB(sb);
742 unsigned long delay;
743
744 spin_lock(&sbi->work_lock);
745 if (!sbi->work_queued) {
746 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
747 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
748 sbi->work_queued = 1;
749 }
750 spin_unlock(&sbi->work_lock);
751 }
752
753 static void ufs_put_super(struct super_block *sb)
754 {
755 struct ufs_sb_info * sbi = UFS_SB(sb);
756
757 UFSD("ENTER\n");
758
759 if (!(sb->s_flags & MS_RDONLY))
760 ufs_put_super_internal(sb);
761 cancel_delayed_work_sync(&sbi->sync_work);
762
763 ubh_brelse_uspi (sbi->s_uspi);
764 kfree (sbi->s_uspi);
765 kfree (sbi);
766 sb->s_fs_info = NULL;
767 UFSD("EXIT\n");
768 return;
769 }
770
771 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
772 {
773 struct ufs_sb_info * sbi;
774 struct ufs_sb_private_info * uspi;
775 struct ufs_super_block_first * usb1;
776 struct ufs_super_block_second * usb2;
777 struct ufs_super_block_third * usb3;
778 struct ufs_buffer_head * ubh;
779 struct inode *inode;
780 unsigned block_size, super_block_size;
781 unsigned flags;
782 unsigned super_block_offset;
783 unsigned maxsymlen;
784 int ret = -EINVAL;
785
786 uspi = NULL;
787 ubh = NULL;
788 flags = 0;
789
790 UFSD("ENTER\n");
791
792 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
793 if (!sbi)
794 goto failed_nomem;
795 sb->s_fs_info = sbi;
796 sbi->sb = sb;
797
798 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
799
800 #ifndef CONFIG_UFS_FS_WRITE
801 if (!(sb->s_flags & MS_RDONLY)) {
802 printk("ufs was compiled with read-only support, "
803 "can't be mounted as read-write\n");
804 goto failed;
805 }
806 #endif
807 mutex_init(&sbi->mutex);
808 spin_lock_init(&sbi->work_lock);
809 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
810 /*
811 * Set default mount options
812 * Parse mount options
813 */
814 sbi->s_mount_opt = 0;
815 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
816 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
817 printk("wrong mount options\n");
818 goto failed;
819 }
820 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
821 if (!silent)
822 printk("You didn't specify the type of your ufs filesystem\n\n"
823 "mount -t ufs -o ufstype="
824 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
825 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
826 "default is ufstype=old\n");
827 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
828 }
829
830 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
831 sbi->s_uspi = uspi;
832 if (!uspi)
833 goto failed;
834 uspi->s_dirblksize = UFS_SECTOR_SIZE;
835 super_block_offset=UFS_SBLOCK;
836
837 /* Keep 2Gig file limit. Some UFS variants need to override
838 this but as I don't know which I'll let those in the know loosen
839 the rules */
840 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
841 case UFS_MOUNT_UFSTYPE_44BSD:
842 UFSD("ufstype=44bsd\n");
843 uspi->s_fsize = block_size = 512;
844 uspi->s_fmask = ~(512 - 1);
845 uspi->s_fshift = 9;
846 uspi->s_sbsize = super_block_size = 1536;
847 uspi->s_sbbase = 0;
848 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
849 break;
850 case UFS_MOUNT_UFSTYPE_UFS2:
851 UFSD("ufstype=ufs2\n");
852 super_block_offset=SBLOCK_UFS2;
853 uspi->s_fsize = block_size = 512;
854 uspi->s_fmask = ~(512 - 1);
855 uspi->s_fshift = 9;
856 uspi->s_sbsize = super_block_size = 1536;
857 uspi->s_sbbase = 0;
858 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
859 break;
860
861 case UFS_MOUNT_UFSTYPE_SUN:
862 UFSD("ufstype=sun\n");
863 uspi->s_fsize = block_size = 1024;
864 uspi->s_fmask = ~(1024 - 1);
865 uspi->s_fshift = 10;
866 uspi->s_sbsize = super_block_size = 2048;
867 uspi->s_sbbase = 0;
868 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
869 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
870 break;
871
872 case UFS_MOUNT_UFSTYPE_SUNOS:
873 UFSD(("ufstype=sunos\n"))
874 uspi->s_fsize = block_size = 1024;
875 uspi->s_fmask = ~(1024 - 1);
876 uspi->s_fshift = 10;
877 uspi->s_sbsize = 2048;
878 super_block_size = 2048;
879 uspi->s_sbbase = 0;
880 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
881 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
882 break;
883
884 case UFS_MOUNT_UFSTYPE_SUNx86:
885 UFSD("ufstype=sunx86\n");
886 uspi->s_fsize = block_size = 1024;
887 uspi->s_fmask = ~(1024 - 1);
888 uspi->s_fshift = 10;
889 uspi->s_sbsize = super_block_size = 2048;
890 uspi->s_sbbase = 0;
891 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
892 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
893 break;
894
895 case UFS_MOUNT_UFSTYPE_OLD:
896 UFSD("ufstype=old\n");
897 uspi->s_fsize = block_size = 1024;
898 uspi->s_fmask = ~(1024 - 1);
899 uspi->s_fshift = 10;
900 uspi->s_sbsize = super_block_size = 2048;
901 uspi->s_sbbase = 0;
902 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
903 if (!(sb->s_flags & MS_RDONLY)) {
904 if (!silent)
905 printk(KERN_INFO "ufstype=old is supported read-only\n");
906 sb->s_flags |= MS_RDONLY;
907 }
908 break;
909
910 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
911 UFSD("ufstype=nextstep\n");
912 uspi->s_fsize = block_size = 1024;
913 uspi->s_fmask = ~(1024 - 1);
914 uspi->s_fshift = 10;
915 uspi->s_sbsize = super_block_size = 2048;
916 uspi->s_sbbase = 0;
917 uspi->s_dirblksize = 1024;
918 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
919 if (!(sb->s_flags & MS_RDONLY)) {
920 if (!silent)
921 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
922 sb->s_flags |= MS_RDONLY;
923 }
924 break;
925
926 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
927 UFSD("ufstype=nextstep-cd\n");
928 uspi->s_fsize = block_size = 2048;
929 uspi->s_fmask = ~(2048 - 1);
930 uspi->s_fshift = 11;
931 uspi->s_sbsize = super_block_size = 2048;
932 uspi->s_sbbase = 0;
933 uspi->s_dirblksize = 1024;
934 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
935 if (!(sb->s_flags & MS_RDONLY)) {
936 if (!silent)
937 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
938 sb->s_flags |= MS_RDONLY;
939 }
940 break;
941
942 case UFS_MOUNT_UFSTYPE_OPENSTEP:
943 UFSD("ufstype=openstep\n");
944 uspi->s_fsize = block_size = 1024;
945 uspi->s_fmask = ~(1024 - 1);
946 uspi->s_fshift = 10;
947 uspi->s_sbsize = super_block_size = 2048;
948 uspi->s_sbbase = 0;
949 uspi->s_dirblksize = 1024;
950 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
951 if (!(sb->s_flags & MS_RDONLY)) {
952 if (!silent)
953 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
954 sb->s_flags |= MS_RDONLY;
955 }
956 break;
957
958 case UFS_MOUNT_UFSTYPE_HP:
959 UFSD("ufstype=hp\n");
960 uspi->s_fsize = block_size = 1024;
961 uspi->s_fmask = ~(1024 - 1);
962 uspi->s_fshift = 10;
963 uspi->s_sbsize = super_block_size = 2048;
964 uspi->s_sbbase = 0;
965 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
966 if (!(sb->s_flags & MS_RDONLY)) {
967 if (!silent)
968 printk(KERN_INFO "ufstype=hp is supported read-only\n");
969 sb->s_flags |= MS_RDONLY;
970 }
971 break;
972 default:
973 if (!silent)
974 printk("unknown ufstype\n");
975 goto failed;
976 }
977
978 again:
979 if (!sb_set_blocksize(sb, block_size)) {
980 printk(KERN_ERR "UFS: failed to set blocksize\n");
981 goto failed;
982 }
983
984 /*
985 * read ufs super block from device
986 */
987
988 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
989
990 if (!ubh)
991 goto failed;
992
993 usb1 = ubh_get_usb_first(uspi);
994 usb2 = ubh_get_usb_second(uspi);
995 usb3 = ubh_get_usb_third(uspi);
996
997 /* Sort out mod used on SunOS 4.1.3 for fs_state */
998 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
999 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1000 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1001 flags &= ~UFS_ST_MASK;
1002 flags |= UFS_ST_SUN;
1003 }
1004
1005 /*
1006 * Check ufs magic number
1007 */
1008 sbi->s_bytesex = BYTESEX_LE;
1009 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1010 case UFS_MAGIC:
1011 case UFS_MAGIC_BW:
1012 case UFS2_MAGIC:
1013 case UFS_MAGIC_LFN:
1014 case UFS_MAGIC_FEA:
1015 case UFS_MAGIC_4GB:
1016 goto magic_found;
1017 }
1018 sbi->s_bytesex = BYTESEX_BE;
1019 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1020 case UFS_MAGIC:
1021 case UFS_MAGIC_BW:
1022 case UFS2_MAGIC:
1023 case UFS_MAGIC_LFN:
1024 case UFS_MAGIC_FEA:
1025 case UFS_MAGIC_4GB:
1026 goto magic_found;
1027 }
1028
1029 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1030 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1031 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1032 && uspi->s_sbbase < 256) {
1033 ubh_brelse_uspi(uspi);
1034 ubh = NULL;
1035 uspi->s_sbbase += 8;
1036 goto again;
1037 }
1038 if (!silent)
1039 printk("ufs_read_super: bad magic number\n");
1040 goto failed;
1041
1042 magic_found:
1043 /*
1044 * Check block and fragment sizes
1045 */
1046 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1047 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1048 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1049 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1050 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1051
1052 if (!is_power_of_2(uspi->s_fsize)) {
1053 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
1054 uspi->s_fsize);
1055 goto failed;
1056 }
1057 if (uspi->s_fsize < 512) {
1058 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
1059 uspi->s_fsize);
1060 goto failed;
1061 }
1062 if (uspi->s_fsize > 4096) {
1063 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
1064 uspi->s_fsize);
1065 goto failed;
1066 }
1067 if (!is_power_of_2(uspi->s_bsize)) {
1068 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
1069 uspi->s_bsize);
1070 goto failed;
1071 }
1072 if (uspi->s_bsize < 4096) {
1073 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
1074 uspi->s_bsize);
1075 goto failed;
1076 }
1077 if (uspi->s_bsize / uspi->s_fsize > 8) {
1078 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
1079 uspi->s_bsize / uspi->s_fsize);
1080 goto failed;
1081 }
1082 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1083 ubh_brelse_uspi(uspi);
1084 ubh = NULL;
1085 block_size = uspi->s_fsize;
1086 super_block_size = uspi->s_sbsize;
1087 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1088 goto again;
1089 }
1090
1091 sbi->s_flags = flags;/*after that line some functions use s_flags*/
1092 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1093
1094 /*
1095 * Check, if file system was correctly unmounted.
1096 * If not, make it read only.
1097 */
1098 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1099 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1100 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1101 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1102 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1103 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1104 switch(usb1->fs_clean) {
1105 case UFS_FSCLEAN:
1106 UFSD("fs is clean\n");
1107 break;
1108 case UFS_FSSTABLE:
1109 UFSD("fs is stable\n");
1110 break;
1111 case UFS_FSLOG:
1112 UFSD("fs is logging fs\n");
1113 break;
1114 case UFS_FSOSF1:
1115 UFSD("fs is DEC OSF/1\n");
1116 break;
1117 case UFS_FSACTIVE:
1118 printk("ufs_read_super: fs is active\n");
1119 sb->s_flags |= MS_RDONLY;
1120 break;
1121 case UFS_FSBAD:
1122 printk("ufs_read_super: fs is bad\n");
1123 sb->s_flags |= MS_RDONLY;
1124 break;
1125 default:
1126 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1127 sb->s_flags |= MS_RDONLY;
1128 break;
1129 }
1130 } else {
1131 printk("ufs_read_super: fs needs fsck\n");
1132 sb->s_flags |= MS_RDONLY;
1133 }
1134
1135 /*
1136 * Read ufs_super_block into internal data structures
1137 */
1138 sb->s_op = &ufs_super_ops;
1139 sb->s_export_op = &ufs_export_ops;
1140
1141 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1142
1143 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1144 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1145 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1146 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1147 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1148 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1149
1150 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1151 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1152 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1153 } else {
1154 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1155 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1156 }
1157
1158 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1159 /* s_bsize already set */
1160 /* s_fsize already set */
1161 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1162 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1163 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1164 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1165 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1166 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1167 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1168 uspi->s_fshift);
1169 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1170 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1171 /* s_sbsize already set */
1172 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1173 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1174 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1175 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1176 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1177 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1178 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1179 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1180
1181 if (uspi->fs_magic == UFS2_MAGIC)
1182 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1183 else
1184 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1185
1186 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1187 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1188 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1189 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1190 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1191 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1192 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1193 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1194 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1195 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1196 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1197 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1198 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1199 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1200
1201 /*
1202 * Compute another frequently used values
1203 */
1204 uspi->s_fpbmask = uspi->s_fpb - 1;
1205 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1206 uspi->s_apbshift = uspi->s_bshift - 3;
1207 else
1208 uspi->s_apbshift = uspi->s_bshift - 2;
1209
1210 uspi->s_2apbshift = uspi->s_apbshift * 2;
1211 uspi->s_3apbshift = uspi->s_apbshift * 3;
1212 uspi->s_apb = 1 << uspi->s_apbshift;
1213 uspi->s_2apb = 1 << uspi->s_2apbshift;
1214 uspi->s_3apb = 1 << uspi->s_3apbshift;
1215 uspi->s_apbmask = uspi->s_apb - 1;
1216 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1217 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1218 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1219 uspi->s_bpf = uspi->s_fsize << 3;
1220 uspi->s_bpfshift = uspi->s_fshift + 3;
1221 uspi->s_bpfmask = uspi->s_bpf - 1;
1222 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1223 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1224 uspi->s_maxsymlinklen =
1225 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1226
1227 if (uspi->fs_magic == UFS2_MAGIC)
1228 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1229 else
1230 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1231 if (uspi->s_maxsymlinklen > maxsymlen) {
1232 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1233 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1234 uspi->s_maxsymlinklen = maxsymlen;
1235 }
1236 sb->s_max_links = UFS_LINK_MAX;
1237
1238 inode = ufs_iget(sb, UFS_ROOTINO);
1239 if (IS_ERR(inode)) {
1240 ret = PTR_ERR(inode);
1241 goto failed;
1242 }
1243 sb->s_root = d_make_root(inode);
1244 if (!sb->s_root) {
1245 ret = -ENOMEM;
1246 goto failed;
1247 }
1248
1249 ufs_setup_cstotal(sb);
1250 /*
1251 * Read cylinder group structures
1252 */
1253 if (!(sb->s_flags & MS_RDONLY))
1254 if (!ufs_read_cylinder_structures(sb))
1255 goto failed;
1256
1257 UFSD("EXIT\n");
1258 return 0;
1259
1260 failed:
1261 if (ubh)
1262 ubh_brelse_uspi (uspi);
1263 kfree (uspi);
1264 kfree(sbi);
1265 sb->s_fs_info = NULL;
1266 UFSD("EXIT (FAILED)\n");
1267 return ret;
1268
1269 failed_nomem:
1270 UFSD("EXIT (NOMEM)\n");
1271 return -ENOMEM;
1272 }
1273
1274 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1275 {
1276 struct ufs_sb_private_info * uspi;
1277 struct ufs_super_block_first * usb1;
1278 struct ufs_super_block_third * usb3;
1279 unsigned new_mount_opt, ufstype;
1280 unsigned flags;
1281
1282 lock_ufs(sb);
1283 lock_super(sb);
1284 uspi = UFS_SB(sb)->s_uspi;
1285 flags = UFS_SB(sb)->s_flags;
1286 usb1 = ubh_get_usb_first(uspi);
1287 usb3 = ubh_get_usb_third(uspi);
1288
1289 /*
1290 * Allow the "check" option to be passed as a remount option.
1291 * It is not possible to change ufstype option during remount
1292 */
1293 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1294 new_mount_opt = 0;
1295 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1296 if (!ufs_parse_options (data, &new_mount_opt)) {
1297 unlock_super(sb);
1298 unlock_ufs(sb);
1299 return -EINVAL;
1300 }
1301 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1302 new_mount_opt |= ufstype;
1303 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1304 printk("ufstype can't be changed during remount\n");
1305 unlock_super(sb);
1306 unlock_ufs(sb);
1307 return -EINVAL;
1308 }
1309
1310 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1311 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1312 unlock_super(sb);
1313 unlock_ufs(sb);
1314 return 0;
1315 }
1316
1317 /*
1318 * fs was mouted as rw, remounting ro
1319 */
1320 if (*mount_flags & MS_RDONLY) {
1321 ufs_put_super_internal(sb);
1322 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1323 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1324 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1325 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1326 ufs_set_fs_state(sb, usb1, usb3,
1327 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1328 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1329 sb->s_flags |= MS_RDONLY;
1330 } else {
1331 /*
1332 * fs was mounted as ro, remounting rw
1333 */
1334 #ifndef CONFIG_UFS_FS_WRITE
1335 printk("ufs was compiled with read-only support, "
1336 "can't be mounted as read-write\n");
1337 unlock_super(sb);
1338 unlock_ufs(sb);
1339 return -EINVAL;
1340 #else
1341 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1342 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1343 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1344 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1345 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1346 printk("this ufstype is read-only supported\n");
1347 unlock_super(sb);
1348 unlock_ufs(sb);
1349 return -EINVAL;
1350 }
1351 if (!ufs_read_cylinder_structures(sb)) {
1352 printk("failed during remounting\n");
1353 unlock_super(sb);
1354 unlock_ufs(sb);
1355 return -EPERM;
1356 }
1357 sb->s_flags &= ~MS_RDONLY;
1358 #endif
1359 }
1360 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1361 unlock_super(sb);
1362 unlock_ufs(sb);
1363 return 0;
1364 }
1365
1366 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1367 {
1368 struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1369 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1370 const struct match_token *tp = tokens;
1371
1372 while (tp->token != Opt_onerror_panic && tp->token != mval)
1373 ++tp;
1374 BUG_ON(tp->token == Opt_onerror_panic);
1375 seq_printf(seq, ",%s", tp->pattern);
1376
1377 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1378 while (tp->token != Opt_err && tp->token != mval)
1379 ++tp;
1380 BUG_ON(tp->token == Opt_err);
1381 seq_printf(seq, ",%s", tp->pattern);
1382
1383 return 0;
1384 }
1385
1386 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1387 {
1388 struct super_block *sb = dentry->d_sb;
1389 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1390 unsigned flags = UFS_SB(sb)->s_flags;
1391 struct ufs_super_block_first *usb1;
1392 struct ufs_super_block_second *usb2;
1393 struct ufs_super_block_third *usb3;
1394 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1395
1396 lock_ufs(sb);
1397
1398 usb1 = ubh_get_usb_first(uspi);
1399 usb2 = ubh_get_usb_second(uspi);
1400 usb3 = ubh_get_usb_third(uspi);
1401
1402 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1403 buf->f_type = UFS2_MAGIC;
1404 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1405 } else {
1406 buf->f_type = UFS_MAGIC;
1407 buf->f_blocks = uspi->s_dsize;
1408 }
1409 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1410 uspi->cs_total.cs_nffree;
1411 buf->f_ffree = uspi->cs_total.cs_nifree;
1412 buf->f_bsize = sb->s_blocksize;
1413 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1414 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1415 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1416 buf->f_namelen = UFS_MAXNAMLEN;
1417 buf->f_fsid.val[0] = (u32)id;
1418 buf->f_fsid.val[1] = (u32)(id >> 32);
1419
1420 unlock_ufs(sb);
1421
1422 return 0;
1423 }
1424
1425 static struct kmem_cache * ufs_inode_cachep;
1426
1427 static struct inode *ufs_alloc_inode(struct super_block *sb)
1428 {
1429 struct ufs_inode_info *ei;
1430 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1431 if (!ei)
1432 return NULL;
1433 ei->vfs_inode.i_version = 1;
1434 return &ei->vfs_inode;
1435 }
1436
1437 static void ufs_i_callback(struct rcu_head *head)
1438 {
1439 struct inode *inode = container_of(head, struct inode, i_rcu);
1440 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1441 }
1442
1443 static void ufs_destroy_inode(struct inode *inode)
1444 {
1445 call_rcu(&inode->i_rcu, ufs_i_callback);
1446 }
1447
1448 static void init_once(void *foo)
1449 {
1450 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1451
1452 inode_init_once(&ei->vfs_inode);
1453 }
1454
1455 static int init_inodecache(void)
1456 {
1457 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1458 sizeof(struct ufs_inode_info),
1459 0, (SLAB_RECLAIM_ACCOUNT|
1460 SLAB_MEM_SPREAD),
1461 init_once);
1462 if (ufs_inode_cachep == NULL)
1463 return -ENOMEM;
1464 return 0;
1465 }
1466
1467 static void destroy_inodecache(void)
1468 {
1469 /*
1470 * Make sure all delayed rcu free inodes are flushed before we
1471 * destroy cache.
1472 */
1473 rcu_barrier();
1474 kmem_cache_destroy(ufs_inode_cachep);
1475 }
1476
1477 static const struct super_operations ufs_super_ops = {
1478 .alloc_inode = ufs_alloc_inode,
1479 .destroy_inode = ufs_destroy_inode,
1480 .write_inode = ufs_write_inode,
1481 .evict_inode = ufs_evict_inode,
1482 .put_super = ufs_put_super,
1483 .sync_fs = ufs_sync_fs,
1484 .statfs = ufs_statfs,
1485 .remount_fs = ufs_remount,
1486 .show_options = ufs_show_options,
1487 };
1488
1489 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1490 int flags, const char *dev_name, void *data)
1491 {
1492 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1493 }
1494
1495 static struct file_system_type ufs_fs_type = {
1496 .owner = THIS_MODULE,
1497 .name = "ufs",
1498 .mount = ufs_mount,
1499 .kill_sb = kill_block_super,
1500 .fs_flags = FS_REQUIRES_DEV,
1501 };
1502
1503 static int __init init_ufs_fs(void)
1504 {
1505 int err = init_inodecache();
1506 if (err)
1507 goto out1;
1508 err = register_filesystem(&ufs_fs_type);
1509 if (err)
1510 goto out;
1511 return 0;
1512 out:
1513 destroy_inodecache();
1514 out1:
1515 return err;
1516 }
1517
1518 static void __exit exit_ufs_fs(void)
1519 {
1520 unregister_filesystem(&ufs_fs_type);
1521 destroy_inodecache();
1522 }
1523
1524 module_init(init_ufs_fs)
1525 module_exit(exit_ufs_fs)
1526 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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