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sched: s/sched_latency/sched_min_granularity
[usb.git] / fs / ufs / super.c
blob73402c5eeb8afc90452768b57f0cbdb13fcc3469
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 <gertjan@cs.vu.nl>
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/module.h>
70 #include <linux/bitops.h>
71
72 #include <stdarg.h>
73
74 #include <asm/uaccess.h>
75 #include <asm/system.h>
76
77 #include <linux/errno.h>
78 #include <linux/fs.h>
79 #include <linux/ufs_fs.h>
80 #include <linux/slab.h>
81 #include <linux/time.h>
82 #include <linux/stat.h>
83 #include <linux/string.h>
84 #include <linux/blkdev.h>
85 #include <linux/init.h>
86 #include <linux/parser.h>
87 #include <linux/smp_lock.h>
88 #include <linux/buffer_head.h>
89 #include <linux/vfs.h>
90 #include <linux/log2.h>
91
92 #include "swab.h"
93 #include "util.h"
94
95 #ifdef CONFIG_UFS_DEBUG
96 /*
97 * Print contents of ufs_super_block, useful for debugging
98 */
99 static void ufs_print_super_stuff(struct super_block *sb,
100 struct ufs_super_block_first *usb1,
101 struct ufs_super_block_second *usb2,
102 struct ufs_super_block_third *usb3)
103 {
104 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
105
106 printk("ufs_print_super_stuff\n");
107 printk(" magic: 0x%x\n", magic);
108 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
109 printk(" fs_size: %llu\n", (unsigned long long)
110 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
111 printk(" fs_dsize: %llu\n", (unsigned long long)
112 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
113 printk(" bsize: %u\n",
114 fs32_to_cpu(sb, usb1->fs_bsize));
115 printk(" fsize: %u\n",
116 fs32_to_cpu(sb, usb1->fs_fsize));
117 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
118 printk(" fs_sblockloc: %llu\n", (unsigned long long)
119 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
120 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
121 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
122 printk(" cs_nbfree(No of free blocks): %llu\n",
123 (unsigned long long)
124 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
125 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
126 (unsigned long long)
127 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
128 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
129 (unsigned long long)
130 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
131 } else {
132 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
133 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
134 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
135 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
136 printk(" cgoffset: %u\n",
137 fs32_to_cpu(sb, usb1->fs_cgoffset));
138 printk(" ~cgmask: 0x%x\n",
139 ~fs32_to_cpu(sb, usb1->fs_cgmask));
140 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
141 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
142 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
143 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
144 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
145 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
146 printk(" fragshift: %u\n",
147 fs32_to_cpu(sb, usb1->fs_fragshift));
148 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
149 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
150 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
151 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
152 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
153 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
154 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
155 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
156 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
157 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
158 printk(" fstodb: %u\n",
159 fs32_to_cpu(sb, usb1->fs_fsbtodb));
160 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
161 printk(" ndir %u\n",
162 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
163 printk(" nifree %u\n",
164 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
165 printk(" nbfree %u\n",
166 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
167 printk(" nffree %u\n",
168 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
169 }
170 printk("\n");
171 }
172
173 /*
174 * Print contents of ufs_cylinder_group, useful for debugging
175 */
176 static void ufs_print_cylinder_stuff(struct super_block *sb,
177 struct ufs_cylinder_group *cg)
178 {
179 printk("\nufs_print_cylinder_stuff\n");
180 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
181 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
182 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
183 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
184 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
185 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
186 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
187 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
188 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
189 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
190 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
191 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
192 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
193 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
194 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
195 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
196 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
197 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
198 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
199 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
200 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
201 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
202 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
203 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
204 printk(" clustersumoff %u\n",
205 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
206 printk(" clusteroff %u\n",
207 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
208 printk(" nclusterblks %u\n",
209 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
210 printk("\n");
211 }
212 #else
213 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
214 # define ufs_print_cylinder_stuff(sb, cg) /**/
215 #endif /* CONFIG_UFS_DEBUG */
216
217 static const struct super_operations ufs_super_ops;
218
219 static char error_buf[1024];
220
221 void ufs_error (struct super_block * sb, const char * function,
222 const char * fmt, ...)
223 {
224 struct ufs_sb_private_info * uspi;
225 struct ufs_super_block_first * usb1;
226 va_list args;
227
228 uspi = UFS_SB(sb)->s_uspi;
229 usb1 = ubh_get_usb_first(uspi);
230
231 if (!(sb->s_flags & MS_RDONLY)) {
232 usb1->fs_clean = UFS_FSBAD;
233 ubh_mark_buffer_dirty(USPI_UBH(uspi));
234 sb->s_dirt = 1;
235 sb->s_flags |= MS_RDONLY;
236 }
237 va_start (args, fmt);
238 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
239 va_end (args);
240 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
241 case UFS_MOUNT_ONERROR_PANIC:
242 panic ("UFS-fs panic (device %s): %s: %s\n",
243 sb->s_id, function, error_buf);
244
245 case UFS_MOUNT_ONERROR_LOCK:
246 case UFS_MOUNT_ONERROR_UMOUNT:
247 case UFS_MOUNT_ONERROR_REPAIR:
248 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
249 sb->s_id, function, error_buf);
250 }
251 }
252
253 void ufs_panic (struct super_block * sb, const char * function,
254 const char * fmt, ...)
255 {
256 struct ufs_sb_private_info * uspi;
257 struct ufs_super_block_first * usb1;
258 va_list args;
259
260 uspi = UFS_SB(sb)->s_uspi;
261 usb1 = ubh_get_usb_first(uspi);
262
263 if (!(sb->s_flags & MS_RDONLY)) {
264 usb1->fs_clean = UFS_FSBAD;
265 ubh_mark_buffer_dirty(USPI_UBH(uspi));
266 sb->s_dirt = 1;
267 }
268 va_start (args, fmt);
269 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
270 va_end (args);
271 sb->s_flags |= MS_RDONLY;
272 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
273 sb->s_id, function, error_buf);
274 }
275
276 void ufs_warning (struct super_block * sb, const char * function,
277 const char * fmt, ...)
278 {
279 va_list args;
280
281 va_start (args, fmt);
282 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
283 va_end (args);
284 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
285 sb->s_id, function, error_buf);
286 }
287
288 enum {
289 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
290 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
291 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
292 Opt_onerror_umount, Opt_onerror_repair, Opt_err
293 };
294
295 static match_table_t tokens = {
296 {Opt_type_old, "ufstype=old"},
297 {Opt_type_sunx86, "ufstype=sunx86"},
298 {Opt_type_sun, "ufstype=sun"},
299 {Opt_type_44bsd, "ufstype=44bsd"},
300 {Opt_type_ufs2, "ufstype=ufs2"},
301 {Opt_type_ufs2, "ufstype=5xbsd"},
302 {Opt_type_hp, "ufstype=hp"},
303 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
304 {Opt_type_nextstep, "ufstype=nextstep"},
305 {Opt_type_openstep, "ufstype=openstep"},
306 {Opt_onerror_panic, "onerror=panic"},
307 {Opt_onerror_lock, "onerror=lock"},
308 {Opt_onerror_umount, "onerror=umount"},
309 {Opt_onerror_repair, "onerror=repair"},
310 {Opt_err, NULL}
311 };
312
313 static int ufs_parse_options (char * options, unsigned * mount_options)
314 {
315 char * p;
316
317 UFSD("ENTER\n");
318
319 if (!options)
320 return 1;
321
322 while ((p = strsep(&options, ",")) != NULL) {
323 substring_t args[MAX_OPT_ARGS];
324 int token;
325 if (!*p)
326 continue;
327
328 token = match_token(p, tokens, args);
329 switch (token) {
330 case Opt_type_old:
331 ufs_clear_opt (*mount_options, UFSTYPE);
332 ufs_set_opt (*mount_options, UFSTYPE_OLD);
333 break;
334 case Opt_type_sunx86:
335 ufs_clear_opt (*mount_options, UFSTYPE);
336 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
337 break;
338 case Opt_type_sun:
339 ufs_clear_opt (*mount_options, UFSTYPE);
340 ufs_set_opt (*mount_options, UFSTYPE_SUN);
341 break;
342 case Opt_type_44bsd:
343 ufs_clear_opt (*mount_options, UFSTYPE);
344 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
345 break;
346 case Opt_type_ufs2:
347 ufs_clear_opt(*mount_options, UFSTYPE);
348 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
349 break;
350 case Opt_type_hp:
351 ufs_clear_opt (*mount_options, UFSTYPE);
352 ufs_set_opt (*mount_options, UFSTYPE_HP);
353 break;
354 case Opt_type_nextstepcd:
355 ufs_clear_opt (*mount_options, UFSTYPE);
356 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
357 break;
358 case Opt_type_nextstep:
359 ufs_clear_opt (*mount_options, UFSTYPE);
360 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
361 break;
362 case Opt_type_openstep:
363 ufs_clear_opt (*mount_options, UFSTYPE);
364 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
365 break;
366 case Opt_onerror_panic:
367 ufs_clear_opt (*mount_options, ONERROR);
368 ufs_set_opt (*mount_options, ONERROR_PANIC);
369 break;
370 case Opt_onerror_lock:
371 ufs_clear_opt (*mount_options, ONERROR);
372 ufs_set_opt (*mount_options, ONERROR_LOCK);
373 break;
374 case Opt_onerror_umount:
375 ufs_clear_opt (*mount_options, ONERROR);
376 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
377 break;
378 case Opt_onerror_repair:
379 printk("UFS-fs: Unable to do repair on error, "
380 "will lock lock instead\n");
381 ufs_clear_opt (*mount_options, ONERROR);
382 ufs_set_opt (*mount_options, ONERROR_REPAIR);
383 break;
384 default:
385 printk("UFS-fs: Invalid option: \"%s\" "
386 "or missing value\n", p);
387 return 0;
388 }
389 }
390 return 1;
391 }
392
393 /*
394 * Diffrent types of UFS hold fs_cstotal in different
395 * places, and use diffrent data structure for it.
396 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
397 */
398 static void ufs_setup_cstotal(struct super_block *sb)
399 {
400 struct ufs_sb_info *sbi = UFS_SB(sb);
401 struct ufs_sb_private_info *uspi = sbi->s_uspi;
402 struct ufs_super_block_first *usb1;
403 struct ufs_super_block_second *usb2;
404 struct ufs_super_block_third *usb3;
405 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
406
407 UFSD("ENTER, mtype=%u\n", mtype);
408 usb1 = ubh_get_usb_first(uspi);
409 usb2 = ubh_get_usb_second(uspi);
410 usb3 = ubh_get_usb_third(uspi);
411
412 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
413 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
414 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
415 /*we have statistic in different place, then usual*/
416 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
417 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
418 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
419 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
420 } else {
421 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
422 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
423 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
424 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
425 }
426 UFSD("EXIT\n");
427 }
428
429 /*
430 * Read on-disk structures associated with cylinder groups
431 */
432 static int ufs_read_cylinder_structures(struct super_block *sb)
433 {
434 struct ufs_sb_info *sbi = UFS_SB(sb);
435 struct ufs_sb_private_info *uspi = sbi->s_uspi;
436 struct ufs_buffer_head * ubh;
437 unsigned char * base, * space;
438 unsigned size, blks, i;
439 struct ufs_super_block_third *usb3;
440
441 UFSD("ENTER\n");
442
443 usb3 = ubh_get_usb_third(uspi);
444 /*
445 * Read cs structures from (usually) first data block
446 * on the device.
447 */
448 size = uspi->s_cssize;
449 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
450 base = space = kmalloc(size, GFP_KERNEL);
451 if (!base)
452 goto failed;
453 sbi->s_csp = (struct ufs_csum *)space;
454 for (i = 0; i < blks; i += uspi->s_fpb) {
455 size = uspi->s_bsize;
456 if (i + uspi->s_fpb > blks)
457 size = (blks - i) * uspi->s_fsize;
458
459 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
460
461 if (!ubh)
462 goto failed;
463
464 ubh_ubhcpymem (space, ubh, size);
465
466 space += size;
467 ubh_brelse (ubh);
468 ubh = NULL;
469 }
470
471 /*
472 * Read cylinder group (we read only first fragment from block
473 * at this time) and prepare internal data structures for cg caching.
474 */
475 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
476 goto failed;
477 for (i = 0; i < uspi->s_ncg; i++)
478 sbi->s_ucg[i] = NULL;
479 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
480 sbi->s_ucpi[i] = NULL;
481 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
482 }
483 for (i = 0; i < uspi->s_ncg; i++) {
484 UFSD("read cg %u\n", i);
485 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
486 goto failed;
487 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
488 goto failed;
489
490 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
491 }
492 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
493 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
494 goto failed;
495 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
496 }
497 sbi->s_cg_loaded = 0;
498 UFSD("EXIT\n");
499 return 1;
500
501 failed:
502 kfree (base);
503 if (sbi->s_ucg) {
504 for (i = 0; i < uspi->s_ncg; i++)
505 if (sbi->s_ucg[i])
506 brelse (sbi->s_ucg[i]);
507 kfree (sbi->s_ucg);
508 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
509 kfree (sbi->s_ucpi[i]);
510 }
511 UFSD("EXIT (FAILED)\n");
512 return 0;
513 }
514
515 /*
516 * Sync our internal copy of fs_cstotal with disk
517 */
518 static void ufs_put_cstotal(struct super_block *sb)
519 {
520 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
521 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
522 struct ufs_super_block_first *usb1;
523 struct ufs_super_block_second *usb2;
524 struct ufs_super_block_third *usb3;
525
526 UFSD("ENTER\n");
527 usb1 = ubh_get_usb_first(uspi);
528 usb2 = ubh_get_usb_second(uspi);
529 usb3 = ubh_get_usb_third(uspi);
530
531 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
532 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
533 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
534 /*we have statistic in different place, then usual*/
535 usb2->fs_un.fs_u2.cs_ndir =
536 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
537 usb2->fs_un.fs_u2.cs_nbfree =
538 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
539 usb3->fs_un1.fs_u2.cs_nifree =
540 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
541 usb3->fs_un1.fs_u2.cs_nffree =
542 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
543 } else {
544 usb1->fs_cstotal.cs_ndir =
545 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
546 usb1->fs_cstotal.cs_nbfree =
547 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
548 usb1->fs_cstotal.cs_nifree =
549 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
550 usb1->fs_cstotal.cs_nffree =
551 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
552 }
553 ubh_mark_buffer_dirty(USPI_UBH(uspi));
554 ufs_print_super_stuff(sb, usb1, usb2, usb3);
555 UFSD("EXIT\n");
556 }
557
558 /**
559 * ufs_put_super_internal() - put on-disk intrenal structures
560 * @sb: pointer to super_block structure
561 * Put on-disk structures associated with cylinder groups
562 * and write them back to disk, also update cs_total on disk
563 */
564 static void ufs_put_super_internal(struct super_block *sb)
565 {
566 struct ufs_sb_info *sbi = UFS_SB(sb);
567 struct ufs_sb_private_info *uspi = sbi->s_uspi;
568 struct ufs_buffer_head * ubh;
569 unsigned char * base, * space;
570 unsigned blks, size, i;
571
572
573 UFSD("ENTER\n");
574 ufs_put_cstotal(sb);
575 size = uspi->s_cssize;
576 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
577 base = space = (char*) sbi->s_csp;
578 for (i = 0; i < blks; i += uspi->s_fpb) {
579 size = uspi->s_bsize;
580 if (i + uspi->s_fpb > blks)
581 size = (blks - i) * uspi->s_fsize;
582
583 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
584
585 ubh_memcpyubh (ubh, space, size);
586 space += size;
587 ubh_mark_buffer_uptodate (ubh, 1);
588 ubh_mark_buffer_dirty (ubh);
589 ubh_brelse (ubh);
590 }
591 for (i = 0; i < sbi->s_cg_loaded; i++) {
592 ufs_put_cylinder (sb, i);
593 kfree (sbi->s_ucpi[i]);
594 }
595 for (; i < UFS_MAX_GROUP_LOADED; i++)
596 kfree (sbi->s_ucpi[i]);
597 for (i = 0; i < uspi->s_ncg; i++)
598 brelse (sbi->s_ucg[i]);
599 kfree (sbi->s_ucg);
600 kfree (base);
601 UFSD("EXIT\n");
602 }
603
604 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
605 {
606 struct ufs_sb_info * sbi;
607 struct ufs_sb_private_info * uspi;
608 struct ufs_super_block_first * usb1;
609 struct ufs_super_block_second * usb2;
610 struct ufs_super_block_third * usb3;
611 struct ufs_buffer_head * ubh;
612 struct inode *inode;
613 unsigned block_size, super_block_size;
614 unsigned flags;
615 unsigned super_block_offset;
616
617 uspi = NULL;
618 ubh = NULL;
619 flags = 0;
620
621 UFSD("ENTER\n");
622
623 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
624 if (!sbi)
625 goto failed_nomem;
626 sb->s_fs_info = sbi;
627
628 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
629
630 #ifndef CONFIG_UFS_FS_WRITE
631 if (!(sb->s_flags & MS_RDONLY)) {
632 printk("ufs was compiled with read-only support, "
633 "can't be mounted as read-write\n");
634 goto failed;
635 }
636 #endif
637 /*
638 * Set default mount options
639 * Parse mount options
640 */
641 sbi->s_mount_opt = 0;
642 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
643 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
644 printk("wrong mount options\n");
645 goto failed;
646 }
647 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
648 if (!silent)
649 printk("You didn't specify the type of your ufs filesystem\n\n"
650 "mount -t ufs -o ufstype="
651 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
652 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
653 "default is ufstype=old\n");
654 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
655 }
656
657 sbi->s_uspi = uspi =
658 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
659 if (!uspi)
660 goto failed;
661 uspi->s_dirblksize = UFS_SECTOR_SIZE;
662 super_block_offset=UFS_SBLOCK;
663
664 /* Keep 2Gig file limit. Some UFS variants need to override
665 this but as I don't know which I'll let those in the know loosen
666 the rules */
667 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
668 case UFS_MOUNT_UFSTYPE_44BSD:
669 UFSD("ufstype=44bsd\n");
670 uspi->s_fsize = block_size = 512;
671 uspi->s_fmask = ~(512 - 1);
672 uspi->s_fshift = 9;
673 uspi->s_sbsize = super_block_size = 1536;
674 uspi->s_sbbase = 0;
675 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
676 break;
677 case UFS_MOUNT_UFSTYPE_UFS2:
678 UFSD("ufstype=ufs2\n");
679 super_block_offset=SBLOCK_UFS2;
680 uspi->s_fsize = block_size = 512;
681 uspi->s_fmask = ~(512 - 1);
682 uspi->s_fshift = 9;
683 uspi->s_sbsize = super_block_size = 1536;
684 uspi->s_sbbase = 0;
685 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
686 break;
687
688 case UFS_MOUNT_UFSTYPE_SUN:
689 UFSD("ufstype=sun\n");
690 uspi->s_fsize = block_size = 1024;
691 uspi->s_fmask = ~(1024 - 1);
692 uspi->s_fshift = 10;
693 uspi->s_sbsize = super_block_size = 2048;
694 uspi->s_sbbase = 0;
695 uspi->s_maxsymlinklen = 56;
696 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
697 break;
698
699 case UFS_MOUNT_UFSTYPE_SUNx86:
700 UFSD("ufstype=sunx86\n");
701 uspi->s_fsize = block_size = 1024;
702 uspi->s_fmask = ~(1024 - 1);
703 uspi->s_fshift = 10;
704 uspi->s_sbsize = super_block_size = 2048;
705 uspi->s_sbbase = 0;
706 uspi->s_maxsymlinklen = 56;
707 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
708 break;
709
710 case UFS_MOUNT_UFSTYPE_OLD:
711 UFSD("ufstype=old\n");
712 uspi->s_fsize = block_size = 1024;
713 uspi->s_fmask = ~(1024 - 1);
714 uspi->s_fshift = 10;
715 uspi->s_sbsize = super_block_size = 2048;
716 uspi->s_sbbase = 0;
717 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
718 if (!(sb->s_flags & MS_RDONLY)) {
719 if (!silent)
720 printk(KERN_INFO "ufstype=old is supported read-only\n");
721 sb->s_flags |= MS_RDONLY;
722 }
723 break;
724
725 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
726 /*TODO: check may be we need set special dir block size?*/
727 UFSD("ufstype=nextstep\n");
728 uspi->s_fsize = block_size = 1024;
729 uspi->s_fmask = ~(1024 - 1);
730 uspi->s_fshift = 10;
731 uspi->s_sbsize = super_block_size = 2048;
732 uspi->s_sbbase = 0;
733 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
734 if (!(sb->s_flags & MS_RDONLY)) {
735 if (!silent)
736 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
737 sb->s_flags |= MS_RDONLY;
738 }
739 break;
740
741 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
742 /*TODO: check may be we need set special dir block size?*/
743 UFSD("ufstype=nextstep-cd\n");
744 uspi->s_fsize = block_size = 2048;
745 uspi->s_fmask = ~(2048 - 1);
746 uspi->s_fshift = 11;
747 uspi->s_sbsize = super_block_size = 2048;
748 uspi->s_sbbase = 0;
749 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
750 if (!(sb->s_flags & MS_RDONLY)) {
751 if (!silent)
752 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
753 sb->s_flags |= MS_RDONLY;
754 }
755 break;
756
757 case UFS_MOUNT_UFSTYPE_OPENSTEP:
758 UFSD("ufstype=openstep\n");
759 uspi->s_fsize = block_size = 1024;
760 uspi->s_fmask = ~(1024 - 1);
761 uspi->s_fshift = 10;
762 uspi->s_sbsize = super_block_size = 2048;
763 uspi->s_sbbase = 0;
764 uspi->s_dirblksize = 1024;
765 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
766 if (!(sb->s_flags & MS_RDONLY)) {
767 if (!silent)
768 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
769 sb->s_flags |= MS_RDONLY;
770 }
771 break;
772
773 case UFS_MOUNT_UFSTYPE_HP:
774 UFSD("ufstype=hp\n");
775 uspi->s_fsize = block_size = 1024;
776 uspi->s_fmask = ~(1024 - 1);
777 uspi->s_fshift = 10;
778 uspi->s_sbsize = super_block_size = 2048;
779 uspi->s_sbbase = 0;
780 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
781 if (!(sb->s_flags & MS_RDONLY)) {
782 if (!silent)
783 printk(KERN_INFO "ufstype=hp is supported read-only\n");
784 sb->s_flags |= MS_RDONLY;
785 }
786 break;
787 default:
788 if (!silent)
789 printk("unknown ufstype\n");
790 goto failed;
791 }
792
793 again:
794 if (!sb_set_blocksize(sb, block_size)) {
795 printk(KERN_ERR "UFS: failed to set blocksize\n");
796 goto failed;
797 }
798
799 /*
800 * read ufs super block from device
801 */
802
803 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
804
805 if (!ubh)
806 goto failed;
807
808
809 usb1 = ubh_get_usb_first(uspi);
810 usb2 = ubh_get_usb_second(uspi);
811 usb3 = ubh_get_usb_third(uspi);
812
813 /*
814 * Check ufs magic number
815 */
816 sbi->s_bytesex = BYTESEX_LE;
817 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
818 case UFS_MAGIC:
819 case UFS2_MAGIC:
820 case UFS_MAGIC_LFN:
821 case UFS_MAGIC_FEA:
822 case UFS_MAGIC_4GB:
823 goto magic_found;
824 }
825 sbi->s_bytesex = BYTESEX_BE;
826 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
827 case UFS_MAGIC:
828 case UFS2_MAGIC:
829 case UFS_MAGIC_LFN:
830 case UFS_MAGIC_FEA:
831 case UFS_MAGIC_4GB:
832 goto magic_found;
833 }
834
835 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
836 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
837 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
838 && uspi->s_sbbase < 256) {
839 ubh_brelse_uspi(uspi);
840 ubh = NULL;
841 uspi->s_sbbase += 8;
842 goto again;
843 }
844 if (!silent)
845 printk("ufs_read_super: bad magic number\n");
846 goto failed;
847
848 magic_found:
849 /*
850 * Check block and fragment sizes
851 */
852 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
853 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
854 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
855 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
856 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
857
858 if (!is_power_of_2(uspi->s_fsize)) {
859 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
860 uspi->s_fsize);
861 goto failed;
862 }
863 if (uspi->s_fsize < 512) {
864 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
865 uspi->s_fsize);
866 goto failed;
867 }
868 if (uspi->s_fsize > 4096) {
869 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
870 uspi->s_fsize);
871 goto failed;
872 }
873 if (!is_power_of_2(uspi->s_bsize)) {
874 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
875 uspi->s_bsize);
876 goto failed;
877 }
878 if (uspi->s_bsize < 4096) {
879 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
880 uspi->s_bsize);
881 goto failed;
882 }
883 if (uspi->s_bsize / uspi->s_fsize > 8) {
884 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
885 uspi->s_bsize / uspi->s_fsize);
886 goto failed;
887 }
888 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
889 ubh_brelse_uspi(uspi);
890 ubh = NULL;
891 block_size = uspi->s_fsize;
892 super_block_size = uspi->s_sbsize;
893 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
894 goto again;
895 }
896
897
898 ufs_print_super_stuff(sb, usb1, usb2, usb3);
899
900 /*
901 * Check, if file system was correctly unmounted.
902 * If not, make it read only.
903 */
904 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
905 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
906 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
907 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
908 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
909 switch(usb1->fs_clean) {
910 case UFS_FSCLEAN:
911 UFSD("fs is clean\n");
912 break;
913 case UFS_FSSTABLE:
914 UFSD("fs is stable\n");
915 break;
916 case UFS_FSOSF1:
917 UFSD("fs is DEC OSF/1\n");
918 break;
919 case UFS_FSACTIVE:
920 printk("ufs_read_super: fs is active\n");
921 sb->s_flags |= MS_RDONLY;
922 break;
923 case UFS_FSBAD:
924 printk("ufs_read_super: fs is bad\n");
925 sb->s_flags |= MS_RDONLY;
926 break;
927 default:
928 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
929 sb->s_flags |= MS_RDONLY;
930 break;
931 }
932 } else {
933 printk("ufs_read_super: fs needs fsck\n");
934 sb->s_flags |= MS_RDONLY;
935 }
936
937 /*
938 * Read ufs_super_block into internal data structures
939 */
940 sb->s_op = &ufs_super_ops;
941 sb->dq_op = NULL; /***/
942 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
943
944 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
945 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
946 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
947 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
948 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
949 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
950
951 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
952 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
953 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
954 } else {
955 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
956 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
957 }
958
959 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
960 /* s_bsize already set */
961 /* s_fsize already set */
962 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
963 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
964 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
965 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
966 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
967 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
968 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
969 uspi->s_fshift);
970 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
971 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
972 /* s_sbsize already set */
973 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
974 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
975 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
976 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
977 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
978 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
979 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
980 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
981
982 if (uspi->fs_magic == UFS2_MAGIC)
983 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
984 else
985 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
986
987 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
988 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
989 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
990 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
991 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
992 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
993 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
994 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
995 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
996 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
997 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
998 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
999 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1000 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1001 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1002
1003 /*
1004 * Compute another frequently used values
1005 */
1006 uspi->s_fpbmask = uspi->s_fpb - 1;
1007 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1008 uspi->s_apbshift = uspi->s_bshift - 3;
1009 else
1010 uspi->s_apbshift = uspi->s_bshift - 2;
1011
1012 uspi->s_2apbshift = uspi->s_apbshift * 2;
1013 uspi->s_3apbshift = uspi->s_apbshift * 3;
1014 uspi->s_apb = 1 << uspi->s_apbshift;
1015 uspi->s_2apb = 1 << uspi->s_2apbshift;
1016 uspi->s_3apb = 1 << uspi->s_3apbshift;
1017 uspi->s_apbmask = uspi->s_apb - 1;
1018 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1019 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1020 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1021 uspi->s_bpf = uspi->s_fsize << 3;
1022 uspi->s_bpfshift = uspi->s_fshift + 3;
1023 uspi->s_bpfmask = uspi->s_bpf - 1;
1024 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1025 UFS_MOUNT_UFSTYPE_44BSD)
1026 uspi->s_maxsymlinklen =
1027 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1028
1029 sbi->s_flags = flags;
1030
1031 inode = iget(sb, UFS_ROOTINO);
1032 if (!inode || is_bad_inode(inode))
1033 goto failed;
1034 sb->s_root = d_alloc_root(inode);
1035 if (!sb->s_root)
1036 goto dalloc_failed;
1037
1038 ufs_setup_cstotal(sb);
1039 /*
1040 * Read cylinder group structures
1041 */
1042 if (!(sb->s_flags & MS_RDONLY))
1043 if (!ufs_read_cylinder_structures(sb))
1044 goto failed;
1045
1046 UFSD("EXIT\n");
1047 return 0;
1048
1049 dalloc_failed:
1050 iput(inode);
1051 failed:
1052 if (ubh)
1053 ubh_brelse_uspi (uspi);
1054 kfree (uspi);
1055 kfree(sbi);
1056 sb->s_fs_info = NULL;
1057 UFSD("EXIT (FAILED)\n");
1058 return -EINVAL;
1059
1060 failed_nomem:
1061 UFSD("EXIT (NOMEM)\n");
1062 return -ENOMEM;
1063 }
1064
1065 static void ufs_write_super(struct super_block *sb)
1066 {
1067 struct ufs_sb_private_info * uspi;
1068 struct ufs_super_block_first * usb1;
1069 struct ufs_super_block_third * usb3;
1070 unsigned flags;
1071
1072 lock_kernel();
1073 UFSD("ENTER\n");
1074 flags = UFS_SB(sb)->s_flags;
1075 uspi = UFS_SB(sb)->s_uspi;
1076 usb1 = ubh_get_usb_first(uspi);
1077 usb3 = ubh_get_usb_third(uspi);
1078
1079 if (!(sb->s_flags & MS_RDONLY)) {
1080 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1081 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1082 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1083 ufs_set_fs_state(sb, usb1, usb3,
1084 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1085 ufs_put_cstotal(sb);
1086 }
1087 sb->s_dirt = 0;
1088 UFSD("EXIT\n");
1089 unlock_kernel();
1090 }
1091
1092 static void ufs_put_super(struct super_block *sb)
1093 {
1094 struct ufs_sb_info * sbi = UFS_SB(sb);
1095
1096 UFSD("ENTER\n");
1097
1098 if (!(sb->s_flags & MS_RDONLY))
1099 ufs_put_super_internal(sb);
1100
1101 ubh_brelse_uspi (sbi->s_uspi);
1102 kfree (sbi->s_uspi);
1103 kfree (sbi);
1104 sb->s_fs_info = NULL;
1105 UFSD("EXIT\n");
1106 return;
1107 }
1108
1109
1110 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1111 {
1112 struct ufs_sb_private_info * uspi;
1113 struct ufs_super_block_first * usb1;
1114 struct ufs_super_block_third * usb3;
1115 unsigned new_mount_opt, ufstype;
1116 unsigned flags;
1117
1118 uspi = UFS_SB(sb)->s_uspi;
1119 flags = UFS_SB(sb)->s_flags;
1120 usb1 = ubh_get_usb_first(uspi);
1121 usb3 = ubh_get_usb_third(uspi);
1122
1123 /*
1124 * Allow the "check" option to be passed as a remount option.
1125 * It is not possible to change ufstype option during remount
1126 */
1127 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1128 new_mount_opt = 0;
1129 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1130 if (!ufs_parse_options (data, &new_mount_opt))
1131 return -EINVAL;
1132 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1133 new_mount_opt |= ufstype;
1134 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1135 printk("ufstype can't be changed during remount\n");
1136 return -EINVAL;
1137 }
1138
1139 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1140 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1141 return 0;
1142 }
1143
1144 /*
1145 * fs was mouted as rw, remounting ro
1146 */
1147 if (*mount_flags & MS_RDONLY) {
1148 ufs_put_super_internal(sb);
1149 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1150 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1151 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1152 ufs_set_fs_state(sb, usb1, usb3,
1153 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1154 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1155 sb->s_dirt = 0;
1156 sb->s_flags |= MS_RDONLY;
1157 } else {
1158 /*
1159 * fs was mounted as ro, remounting rw
1160 */
1161 #ifndef CONFIG_UFS_FS_WRITE
1162 printk("ufs was compiled with read-only support, "
1163 "can't be mounted as read-write\n");
1164 return -EINVAL;
1165 #else
1166 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1167 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1168 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1169 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1170 printk("this ufstype is read-only supported\n");
1171 return -EINVAL;
1172 }
1173 if (!ufs_read_cylinder_structures(sb)) {
1174 printk("failed during remounting\n");
1175 return -EPERM;
1176 }
1177 sb->s_flags &= ~MS_RDONLY;
1178 #endif
1179 }
1180 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1181 return 0;
1182 }
1183
1184 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1185 {
1186 struct super_block *sb = dentry->d_sb;
1187 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1188 unsigned flags = UFS_SB(sb)->s_flags;
1189 struct ufs_super_block_first *usb1;
1190 struct ufs_super_block_second *usb2;
1191 struct ufs_super_block_third *usb3;
1192
1193 lock_kernel();
1194
1195 usb1 = ubh_get_usb_first(uspi);
1196 usb2 = ubh_get_usb_second(uspi);
1197 usb3 = ubh_get_usb_third(uspi);
1198
1199 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1200 buf->f_type = UFS2_MAGIC;
1201 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1202 } else {
1203 buf->f_type = UFS_MAGIC;
1204 buf->f_blocks = uspi->s_dsize;
1205 }
1206 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1207 uspi->cs_total.cs_nffree;
1208 buf->f_ffree = uspi->cs_total.cs_nifree;
1209 buf->f_bsize = sb->s_blocksize;
1210 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1211 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1212 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1213 buf->f_namelen = UFS_MAXNAMLEN;
1214
1215 unlock_kernel();
1216
1217 return 0;
1218 }
1219
1220 static struct kmem_cache * ufs_inode_cachep;
1221
1222 static struct inode *ufs_alloc_inode(struct super_block *sb)
1223 {
1224 struct ufs_inode_info *ei;
1225 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1226 if (!ei)
1227 return NULL;
1228 ei->vfs_inode.i_version = 1;
1229 return &ei->vfs_inode;
1230 }
1231
1232 static void ufs_destroy_inode(struct inode *inode)
1233 {
1234 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1235 }
1236
1237 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
1238 {
1239 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1240
1241 inode_init_once(&ei->vfs_inode);
1242 }
1243
1244 static int init_inodecache(void)
1245 {
1246 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1247 sizeof(struct ufs_inode_info),
1248 0, (SLAB_RECLAIM_ACCOUNT|
1249 SLAB_MEM_SPREAD),
1250 init_once);
1251 if (ufs_inode_cachep == NULL)
1252 return -ENOMEM;
1253 return 0;
1254 }
1255
1256 static void destroy_inodecache(void)
1257 {
1258 kmem_cache_destroy(ufs_inode_cachep);
1259 }
1260
1261 #ifdef CONFIG_QUOTA
1262 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1263 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1264 #endif
1265
1266 static const struct super_operations ufs_super_ops = {
1267 .alloc_inode = ufs_alloc_inode,
1268 .destroy_inode = ufs_destroy_inode,
1269 .read_inode = ufs_read_inode,
1270 .write_inode = ufs_write_inode,
1271 .delete_inode = ufs_delete_inode,
1272 .put_super = ufs_put_super,
1273 .write_super = ufs_write_super,
1274 .statfs = ufs_statfs,
1275 .remount_fs = ufs_remount,
1276 #ifdef CONFIG_QUOTA
1277 .quota_read = ufs_quota_read,
1278 .quota_write = ufs_quota_write,
1279 #endif
1280 };
1281
1282 #ifdef CONFIG_QUOTA
1283
1284 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1285 * acquiring the locks... As quota files are never truncated and quota code
1286 * itself serializes the operations (and noone else should touch the files)
1287 * we don't have to be afraid of races */
1288 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1289 size_t len, loff_t off)
1290 {
1291 struct inode *inode = sb_dqopt(sb)->files[type];
1292 sector_t blk = off >> sb->s_blocksize_bits;
1293 int err = 0;
1294 int offset = off & (sb->s_blocksize - 1);
1295 int tocopy;
1296 size_t toread;
1297 struct buffer_head *bh;
1298 loff_t i_size = i_size_read(inode);
1299
1300 if (off > i_size)
1301 return 0;
1302 if (off+len > i_size)
1303 len = i_size-off;
1304 toread = len;
1305 while (toread > 0) {
1306 tocopy = sb->s_blocksize - offset < toread ?
1307 sb->s_blocksize - offset : toread;
1308
1309 bh = ufs_bread(inode, blk, 0, &err);
1310 if (err)
1311 return err;
1312 if (!bh) /* A hole? */
1313 memset(data, 0, tocopy);
1314 else {
1315 memcpy(data, bh->b_data+offset, tocopy);
1316 brelse(bh);
1317 }
1318 offset = 0;
1319 toread -= tocopy;
1320 data += tocopy;
1321 blk++;
1322 }
1323 return len;
1324 }
1325
1326 /* Write to quotafile */
1327 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1328 const char *data, size_t len, loff_t off)
1329 {
1330 struct inode *inode = sb_dqopt(sb)->files[type];
1331 sector_t blk = off >> sb->s_blocksize_bits;
1332 int err = 0;
1333 int offset = off & (sb->s_blocksize - 1);
1334 int tocopy;
1335 size_t towrite = len;
1336 struct buffer_head *bh;
1337
1338 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1339 while (towrite > 0) {
1340 tocopy = sb->s_blocksize - offset < towrite ?
1341 sb->s_blocksize - offset : towrite;
1342
1343 bh = ufs_bread(inode, blk, 1, &err);
1344 if (!bh)
1345 goto out;
1346 lock_buffer(bh);
1347 memcpy(bh->b_data+offset, data, tocopy);
1348 flush_dcache_page(bh->b_page);
1349 set_buffer_uptodate(bh);
1350 mark_buffer_dirty(bh);
1351 unlock_buffer(bh);
1352 brelse(bh);
1353 offset = 0;
1354 towrite -= tocopy;
1355 data += tocopy;
1356 blk++;
1357 }
1358 out:
1359 if (len == towrite) {
1360 mutex_unlock(&inode->i_mutex);
1361 return err;
1362 }
1363 if (inode->i_size < off+len-towrite)
1364 i_size_write(inode, off+len-towrite);
1365 inode->i_version++;
1366 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1367 mark_inode_dirty(inode);
1368 mutex_unlock(&inode->i_mutex);
1369 return len - towrite;
1370 }
1371
1372 #endif
1373
1374 static int ufs_get_sb(struct file_system_type *fs_type,
1375 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1376 {
1377 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1378 }
1379
1380 static struct file_system_type ufs_fs_type = {
1381 .owner = THIS_MODULE,
1382 .name = "ufs",
1383 .get_sb = ufs_get_sb,
1384 .kill_sb = kill_block_super,
1385 .fs_flags = FS_REQUIRES_DEV,
1386 };
1387
1388 static int __init init_ufs_fs(void)
1389 {
1390 int err = init_inodecache();
1391 if (err)
1392 goto out1;
1393 err = register_filesystem(&ufs_fs_type);
1394 if (err)
1395 goto out;
1396 return 0;
1397 out:
1398 destroy_inodecache();
1399 out1:
1400 return err;
1401 }
1402
1403 static void __exit exit_ufs_fs(void)
1404 {
1405 unregister_filesystem(&ufs_fs_type);
1406 destroy_inodecache();
1407 }
1408
1409 module_init(init_ufs_fs)
1410 module_exit(exit_ufs_fs)
1411 MODULE_LICENSE("GPL");
USB Experimental Work