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fs/ufs: re-arrange the code a bit
[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 sb->s_dirt = 1;
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 sb->s_dirt = 1;
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 sb->s_dirt = 0;
719
720 UFSD("EXIT\n");
721 unlock_super(sb);
722 unlock_ufs(sb);
723
724 return 0;
725 }
726
727 static void ufs_write_super(struct super_block *sb)
728 {
729 if (!(sb->s_flags & MS_RDONLY))
730 ufs_sync_fs(sb, 1);
731 else
732 sb->s_dirt = 0;
733 }
734
735 static void ufs_put_super(struct super_block *sb)
736 {
737 struct ufs_sb_info * sbi = UFS_SB(sb);
738
739 UFSD("ENTER\n");
740
741 if (!(sb->s_flags & MS_RDONLY))
742 ufs_put_super_internal(sb);
743
744 ubh_brelse_uspi (sbi->s_uspi);
745 kfree (sbi->s_uspi);
746 kfree (sbi);
747 sb->s_fs_info = NULL;
748 UFSD("EXIT\n");
749 return;
750 }
751
752 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
753 {
754 struct ufs_sb_info * sbi;
755 struct ufs_sb_private_info * uspi;
756 struct ufs_super_block_first * usb1;
757 struct ufs_super_block_second * usb2;
758 struct ufs_super_block_third * usb3;
759 struct ufs_buffer_head * ubh;
760 struct inode *inode;
761 unsigned block_size, super_block_size;
762 unsigned flags;
763 unsigned super_block_offset;
764 unsigned maxsymlen;
765 int ret = -EINVAL;
766
767 uspi = NULL;
768 ubh = NULL;
769 flags = 0;
770
771 UFSD("ENTER\n");
772
773 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
774 if (!sbi)
775 goto failed_nomem;
776 sb->s_fs_info = sbi;
777
778 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
779
780 #ifndef CONFIG_UFS_FS_WRITE
781 if (!(sb->s_flags & MS_RDONLY)) {
782 printk("ufs was compiled with read-only support, "
783 "can't be mounted as read-write\n");
784 goto failed;
785 }
786 #endif
787 mutex_init(&sbi->mutex);
788 /*
789 * Set default mount options
790 * Parse mount options
791 */
792 sbi->s_mount_opt = 0;
793 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
794 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
795 printk("wrong mount options\n");
796 goto failed;
797 }
798 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
799 if (!silent)
800 printk("You didn't specify the type of your ufs filesystem\n\n"
801 "mount -t ufs -o ufstype="
802 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
803 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
804 "default is ufstype=old\n");
805 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
806 }
807
808 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
809 sbi->s_uspi = uspi;
810 if (!uspi)
811 goto failed;
812 uspi->s_dirblksize = UFS_SECTOR_SIZE;
813 super_block_offset=UFS_SBLOCK;
814
815 /* Keep 2Gig file limit. Some UFS variants need to override
816 this but as I don't know which I'll let those in the know loosen
817 the rules */
818 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
819 case UFS_MOUNT_UFSTYPE_44BSD:
820 UFSD("ufstype=44bsd\n");
821 uspi->s_fsize = block_size = 512;
822 uspi->s_fmask = ~(512 - 1);
823 uspi->s_fshift = 9;
824 uspi->s_sbsize = super_block_size = 1536;
825 uspi->s_sbbase = 0;
826 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
827 break;
828 case UFS_MOUNT_UFSTYPE_UFS2:
829 UFSD("ufstype=ufs2\n");
830 super_block_offset=SBLOCK_UFS2;
831 uspi->s_fsize = block_size = 512;
832 uspi->s_fmask = ~(512 - 1);
833 uspi->s_fshift = 9;
834 uspi->s_sbsize = super_block_size = 1536;
835 uspi->s_sbbase = 0;
836 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
837 break;
838
839 case UFS_MOUNT_UFSTYPE_SUN:
840 UFSD("ufstype=sun\n");
841 uspi->s_fsize = block_size = 1024;
842 uspi->s_fmask = ~(1024 - 1);
843 uspi->s_fshift = 10;
844 uspi->s_sbsize = super_block_size = 2048;
845 uspi->s_sbbase = 0;
846 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
847 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
848 break;
849
850 case UFS_MOUNT_UFSTYPE_SUNOS:
851 UFSD(("ufstype=sunos\n"))
852 uspi->s_fsize = block_size = 1024;
853 uspi->s_fmask = ~(1024 - 1);
854 uspi->s_fshift = 10;
855 uspi->s_sbsize = 2048;
856 super_block_size = 2048;
857 uspi->s_sbbase = 0;
858 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
859 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
860 break;
861
862 case UFS_MOUNT_UFSTYPE_SUNx86:
863 UFSD("ufstype=sunx86\n");
864 uspi->s_fsize = block_size = 1024;
865 uspi->s_fmask = ~(1024 - 1);
866 uspi->s_fshift = 10;
867 uspi->s_sbsize = super_block_size = 2048;
868 uspi->s_sbbase = 0;
869 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
870 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
871 break;
872
873 case UFS_MOUNT_UFSTYPE_OLD:
874 UFSD("ufstype=old\n");
875 uspi->s_fsize = block_size = 1024;
876 uspi->s_fmask = ~(1024 - 1);
877 uspi->s_fshift = 10;
878 uspi->s_sbsize = super_block_size = 2048;
879 uspi->s_sbbase = 0;
880 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
881 if (!(sb->s_flags & MS_RDONLY)) {
882 if (!silent)
883 printk(KERN_INFO "ufstype=old is supported read-only\n");
884 sb->s_flags |= MS_RDONLY;
885 }
886 break;
887
888 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
889 UFSD("ufstype=nextstep\n");
890 uspi->s_fsize = block_size = 1024;
891 uspi->s_fmask = ~(1024 - 1);
892 uspi->s_fshift = 10;
893 uspi->s_sbsize = super_block_size = 2048;
894 uspi->s_sbbase = 0;
895 uspi->s_dirblksize = 1024;
896 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
897 if (!(sb->s_flags & MS_RDONLY)) {
898 if (!silent)
899 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
900 sb->s_flags |= MS_RDONLY;
901 }
902 break;
903
904 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
905 UFSD("ufstype=nextstep-cd\n");
906 uspi->s_fsize = block_size = 2048;
907 uspi->s_fmask = ~(2048 - 1);
908 uspi->s_fshift = 11;
909 uspi->s_sbsize = super_block_size = 2048;
910 uspi->s_sbbase = 0;
911 uspi->s_dirblksize = 1024;
912 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
913 if (!(sb->s_flags & MS_RDONLY)) {
914 if (!silent)
915 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
916 sb->s_flags |= MS_RDONLY;
917 }
918 break;
919
920 case UFS_MOUNT_UFSTYPE_OPENSTEP:
921 UFSD("ufstype=openstep\n");
922 uspi->s_fsize = block_size = 1024;
923 uspi->s_fmask = ~(1024 - 1);
924 uspi->s_fshift = 10;
925 uspi->s_sbsize = super_block_size = 2048;
926 uspi->s_sbbase = 0;
927 uspi->s_dirblksize = 1024;
928 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
929 if (!(sb->s_flags & MS_RDONLY)) {
930 if (!silent)
931 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
932 sb->s_flags |= MS_RDONLY;
933 }
934 break;
935
936 case UFS_MOUNT_UFSTYPE_HP:
937 UFSD("ufstype=hp\n");
938 uspi->s_fsize = block_size = 1024;
939 uspi->s_fmask = ~(1024 - 1);
940 uspi->s_fshift = 10;
941 uspi->s_sbsize = super_block_size = 2048;
942 uspi->s_sbbase = 0;
943 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
944 if (!(sb->s_flags & MS_RDONLY)) {
945 if (!silent)
946 printk(KERN_INFO "ufstype=hp is supported read-only\n");
947 sb->s_flags |= MS_RDONLY;
948 }
949 break;
950 default:
951 if (!silent)
952 printk("unknown ufstype\n");
953 goto failed;
954 }
955
956 again:
957 if (!sb_set_blocksize(sb, block_size)) {
958 printk(KERN_ERR "UFS: failed to set blocksize\n");
959 goto failed;
960 }
961
962 /*
963 * read ufs super block from device
964 */
965
966 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
967
968 if (!ubh)
969 goto failed;
970
971 usb1 = ubh_get_usb_first(uspi);
972 usb2 = ubh_get_usb_second(uspi);
973 usb3 = ubh_get_usb_third(uspi);
974
975 /* Sort out mod used on SunOS 4.1.3 for fs_state */
976 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
977 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
978 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
979 flags &= ~UFS_ST_MASK;
980 flags |= UFS_ST_SUN;
981 }
982
983 /*
984 * Check ufs magic number
985 */
986 sbi->s_bytesex = BYTESEX_LE;
987 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
988 case UFS_MAGIC:
989 case UFS_MAGIC_BW:
990 case UFS2_MAGIC:
991 case UFS_MAGIC_LFN:
992 case UFS_MAGIC_FEA:
993 case UFS_MAGIC_4GB:
994 goto magic_found;
995 }
996 sbi->s_bytesex = BYTESEX_BE;
997 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
998 case UFS_MAGIC:
999 case UFS_MAGIC_BW:
1000 case UFS2_MAGIC:
1001 case UFS_MAGIC_LFN:
1002 case UFS_MAGIC_FEA:
1003 case UFS_MAGIC_4GB:
1004 goto magic_found;
1005 }
1006
1007 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1008 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1009 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1010 && uspi->s_sbbase < 256) {
1011 ubh_brelse_uspi(uspi);
1012 ubh = NULL;
1013 uspi->s_sbbase += 8;
1014 goto again;
1015 }
1016 if (!silent)
1017 printk("ufs_read_super: bad magic number\n");
1018 goto failed;
1019
1020 magic_found:
1021 /*
1022 * Check block and fragment sizes
1023 */
1024 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1025 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1026 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1027 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1028 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1029
1030 if (!is_power_of_2(uspi->s_fsize)) {
1031 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
1032 uspi->s_fsize);
1033 goto failed;
1034 }
1035 if (uspi->s_fsize < 512) {
1036 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
1037 uspi->s_fsize);
1038 goto failed;
1039 }
1040 if (uspi->s_fsize > 4096) {
1041 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
1042 uspi->s_fsize);
1043 goto failed;
1044 }
1045 if (!is_power_of_2(uspi->s_bsize)) {
1046 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
1047 uspi->s_bsize);
1048 goto failed;
1049 }
1050 if (uspi->s_bsize < 4096) {
1051 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
1052 uspi->s_bsize);
1053 goto failed;
1054 }
1055 if (uspi->s_bsize / uspi->s_fsize > 8) {
1056 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
1057 uspi->s_bsize / uspi->s_fsize);
1058 goto failed;
1059 }
1060 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1061 ubh_brelse_uspi(uspi);
1062 ubh = NULL;
1063 block_size = uspi->s_fsize;
1064 super_block_size = uspi->s_sbsize;
1065 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1066 goto again;
1067 }
1068
1069 sbi->s_flags = flags;/*after that line some functions use s_flags*/
1070 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1071
1072 /*
1073 * Check, if file system was correctly unmounted.
1074 * If not, make it read only.
1075 */
1076 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1077 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1078 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1079 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1080 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1081 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1082 switch(usb1->fs_clean) {
1083 case UFS_FSCLEAN:
1084 UFSD("fs is clean\n");
1085 break;
1086 case UFS_FSSTABLE:
1087 UFSD("fs is stable\n");
1088 break;
1089 case UFS_FSLOG:
1090 UFSD("fs is logging fs\n");
1091 break;
1092 case UFS_FSOSF1:
1093 UFSD("fs is DEC OSF/1\n");
1094 break;
1095 case UFS_FSACTIVE:
1096 printk("ufs_read_super: fs is active\n");
1097 sb->s_flags |= MS_RDONLY;
1098 break;
1099 case UFS_FSBAD:
1100 printk("ufs_read_super: fs is bad\n");
1101 sb->s_flags |= MS_RDONLY;
1102 break;
1103 default:
1104 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1105 sb->s_flags |= MS_RDONLY;
1106 break;
1107 }
1108 } else {
1109 printk("ufs_read_super: fs needs fsck\n");
1110 sb->s_flags |= MS_RDONLY;
1111 }
1112
1113 /*
1114 * Read ufs_super_block into internal data structures
1115 */
1116 sb->s_op = &ufs_super_ops;
1117 sb->s_export_op = &ufs_export_ops;
1118
1119 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1120
1121 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1122 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1123 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1124 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1125 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1126 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1127
1128 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1129 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1130 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1131 } else {
1132 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1133 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1134 }
1135
1136 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1137 /* s_bsize already set */
1138 /* s_fsize already set */
1139 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1140 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1141 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1142 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1143 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1144 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1145 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1146 uspi->s_fshift);
1147 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1148 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1149 /* s_sbsize already set */
1150 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1151 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1152 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1153 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1154 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1155 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1156 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1157 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1158
1159 if (uspi->fs_magic == UFS2_MAGIC)
1160 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1161 else
1162 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1163
1164 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1165 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1166 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1167 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1168 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1169 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1170 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1171 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1172 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1173 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1174 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1175 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1176 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1177 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1178
1179 /*
1180 * Compute another frequently used values
1181 */
1182 uspi->s_fpbmask = uspi->s_fpb - 1;
1183 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1184 uspi->s_apbshift = uspi->s_bshift - 3;
1185 else
1186 uspi->s_apbshift = uspi->s_bshift - 2;
1187
1188 uspi->s_2apbshift = uspi->s_apbshift * 2;
1189 uspi->s_3apbshift = uspi->s_apbshift * 3;
1190 uspi->s_apb = 1 << uspi->s_apbshift;
1191 uspi->s_2apb = 1 << uspi->s_2apbshift;
1192 uspi->s_3apb = 1 << uspi->s_3apbshift;
1193 uspi->s_apbmask = uspi->s_apb - 1;
1194 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1195 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1196 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1197 uspi->s_bpf = uspi->s_fsize << 3;
1198 uspi->s_bpfshift = uspi->s_fshift + 3;
1199 uspi->s_bpfmask = uspi->s_bpf - 1;
1200 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1201 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1202 uspi->s_maxsymlinklen =
1203 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1204
1205 if (uspi->fs_magic == UFS2_MAGIC)
1206 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1207 else
1208 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1209 if (uspi->s_maxsymlinklen > maxsymlen) {
1210 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1211 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1212 uspi->s_maxsymlinklen = maxsymlen;
1213 }
1214 sb->s_max_links = UFS_LINK_MAX;
1215
1216 inode = ufs_iget(sb, UFS_ROOTINO);
1217 if (IS_ERR(inode)) {
1218 ret = PTR_ERR(inode);
1219 goto failed;
1220 }
1221 sb->s_root = d_make_root(inode);
1222 if (!sb->s_root) {
1223 ret = -ENOMEM;
1224 goto failed;
1225 }
1226
1227 ufs_setup_cstotal(sb);
1228 /*
1229 * Read cylinder group structures
1230 */
1231 if (!(sb->s_flags & MS_RDONLY))
1232 if (!ufs_read_cylinder_structures(sb))
1233 goto failed;
1234
1235 UFSD("EXIT\n");
1236 return 0;
1237
1238 failed:
1239 if (ubh)
1240 ubh_brelse_uspi (uspi);
1241 kfree (uspi);
1242 kfree(sbi);
1243 sb->s_fs_info = NULL;
1244 UFSD("EXIT (FAILED)\n");
1245 return ret;
1246
1247 failed_nomem:
1248 UFSD("EXIT (NOMEM)\n");
1249 return -ENOMEM;
1250 }
1251
1252 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1253 {
1254 struct ufs_sb_private_info * uspi;
1255 struct ufs_super_block_first * usb1;
1256 struct ufs_super_block_third * usb3;
1257 unsigned new_mount_opt, ufstype;
1258 unsigned flags;
1259
1260 lock_ufs(sb);
1261 lock_super(sb);
1262 uspi = UFS_SB(sb)->s_uspi;
1263 flags = UFS_SB(sb)->s_flags;
1264 usb1 = ubh_get_usb_first(uspi);
1265 usb3 = ubh_get_usb_third(uspi);
1266
1267 /*
1268 * Allow the "check" option to be passed as a remount option.
1269 * It is not possible to change ufstype option during remount
1270 */
1271 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1272 new_mount_opt = 0;
1273 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1274 if (!ufs_parse_options (data, &new_mount_opt)) {
1275 unlock_super(sb);
1276 unlock_ufs(sb);
1277 return -EINVAL;
1278 }
1279 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1280 new_mount_opt |= ufstype;
1281 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1282 printk("ufstype can't be changed during remount\n");
1283 unlock_super(sb);
1284 unlock_ufs(sb);
1285 return -EINVAL;
1286 }
1287
1288 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1289 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1290 unlock_super(sb);
1291 unlock_ufs(sb);
1292 return 0;
1293 }
1294
1295 /*
1296 * fs was mouted as rw, remounting ro
1297 */
1298 if (*mount_flags & MS_RDONLY) {
1299 ufs_put_super_internal(sb);
1300 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1301 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1302 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1303 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1304 ufs_set_fs_state(sb, usb1, usb3,
1305 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1306 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1307 sb->s_dirt = 0;
1308 sb->s_flags |= MS_RDONLY;
1309 } else {
1310 /*
1311 * fs was mounted as ro, remounting rw
1312 */
1313 #ifndef CONFIG_UFS_FS_WRITE
1314 printk("ufs was compiled with read-only support, "
1315 "can't be mounted as read-write\n");
1316 unlock_super(sb);
1317 unlock_ufs(sb);
1318 return -EINVAL;
1319 #else
1320 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1321 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1322 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1323 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1324 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1325 printk("this ufstype is read-only supported\n");
1326 unlock_super(sb);
1327 unlock_ufs(sb);
1328 return -EINVAL;
1329 }
1330 if (!ufs_read_cylinder_structures(sb)) {
1331 printk("failed during remounting\n");
1332 unlock_super(sb);
1333 unlock_ufs(sb);
1334 return -EPERM;
1335 }
1336 sb->s_flags &= ~MS_RDONLY;
1337 #endif
1338 }
1339 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1340 unlock_super(sb);
1341 unlock_ufs(sb);
1342 return 0;
1343 }
1344
1345 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1346 {
1347 struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1348 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1349 const struct match_token *tp = tokens;
1350
1351 while (tp->token != Opt_onerror_panic && tp->token != mval)
1352 ++tp;
1353 BUG_ON(tp->token == Opt_onerror_panic);
1354 seq_printf(seq, ",%s", tp->pattern);
1355
1356 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1357 while (tp->token != Opt_err && tp->token != mval)
1358 ++tp;
1359 BUG_ON(tp->token == Opt_err);
1360 seq_printf(seq, ",%s", tp->pattern);
1361
1362 return 0;
1363 }
1364
1365 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1366 {
1367 struct super_block *sb = dentry->d_sb;
1368 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1369 unsigned flags = UFS_SB(sb)->s_flags;
1370 struct ufs_super_block_first *usb1;
1371 struct ufs_super_block_second *usb2;
1372 struct ufs_super_block_third *usb3;
1373 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1374
1375 lock_ufs(sb);
1376
1377 usb1 = ubh_get_usb_first(uspi);
1378 usb2 = ubh_get_usb_second(uspi);
1379 usb3 = ubh_get_usb_third(uspi);
1380
1381 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1382 buf->f_type = UFS2_MAGIC;
1383 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1384 } else {
1385 buf->f_type = UFS_MAGIC;
1386 buf->f_blocks = uspi->s_dsize;
1387 }
1388 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1389 uspi->cs_total.cs_nffree;
1390 buf->f_ffree = uspi->cs_total.cs_nifree;
1391 buf->f_bsize = sb->s_blocksize;
1392 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1393 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1394 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1395 buf->f_namelen = UFS_MAXNAMLEN;
1396 buf->f_fsid.val[0] = (u32)id;
1397 buf->f_fsid.val[1] = (u32)(id >> 32);
1398
1399 unlock_ufs(sb);
1400
1401 return 0;
1402 }
1403
1404 static struct kmem_cache * ufs_inode_cachep;
1405
1406 static struct inode *ufs_alloc_inode(struct super_block *sb)
1407 {
1408 struct ufs_inode_info *ei;
1409 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1410 if (!ei)
1411 return NULL;
1412 ei->vfs_inode.i_version = 1;
1413 return &ei->vfs_inode;
1414 }
1415
1416 static void ufs_i_callback(struct rcu_head *head)
1417 {
1418 struct inode *inode = container_of(head, struct inode, i_rcu);
1419 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1420 }
1421
1422 static void ufs_destroy_inode(struct inode *inode)
1423 {
1424 call_rcu(&inode->i_rcu, ufs_i_callback);
1425 }
1426
1427 static void init_once(void *foo)
1428 {
1429 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1430
1431 inode_init_once(&ei->vfs_inode);
1432 }
1433
1434 static int init_inodecache(void)
1435 {
1436 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1437 sizeof(struct ufs_inode_info),
1438 0, (SLAB_RECLAIM_ACCOUNT|
1439 SLAB_MEM_SPREAD),
1440 init_once);
1441 if (ufs_inode_cachep == NULL)
1442 return -ENOMEM;
1443 return 0;
1444 }
1445
1446 static void destroy_inodecache(void)
1447 {
1448 kmem_cache_destroy(ufs_inode_cachep);
1449 }
1450
1451 static const struct super_operations ufs_super_ops = {
1452 .alloc_inode = ufs_alloc_inode,
1453 .destroy_inode = ufs_destroy_inode,
1454 .write_inode = ufs_write_inode,
1455 .evict_inode = ufs_evict_inode,
1456 .put_super = ufs_put_super,
1457 .write_super = ufs_write_super,
1458 .sync_fs = ufs_sync_fs,
1459 .statfs = ufs_statfs,
1460 .remount_fs = ufs_remount,
1461 .show_options = ufs_show_options,
1462 };
1463
1464 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1465 int flags, const char *dev_name, void *data)
1466 {
1467 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1468 }
1469
1470 static struct file_system_type ufs_fs_type = {
1471 .owner = THIS_MODULE,
1472 .name = "ufs",
1473 .mount = ufs_mount,
1474 .kill_sb = kill_block_super,
1475 .fs_flags = FS_REQUIRES_DEV,
1476 };
1477
1478 static int __init init_ufs_fs(void)
1479 {
1480 int err = init_inodecache();
1481 if (err)
1482 goto out1;
1483 err = register_filesystem(&ufs_fs_type);
1484 if (err)
1485 goto out;
1486 return 0;
1487 out:
1488 destroy_inodecache();
1489 out1:
1490 return err;
1491 }
1492
1493 static void __exit exit_ufs_fs(void)
1494 {
1495 unregister_filesystem(&ufs_fs_type);
1496 destroy_inodecache();
1497 }
1498
1499 module_init(init_ufs_fs)
1500 module_exit(exit_ufs_fs)
1501 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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