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USB: fix concurrent buffer access in the hub driver
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ufs / super.c
blob8a8e9382ec099a2b41d176c6dc391a316af7b80d
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 */
65
66
67 #include <linux/module.h>
68 #include <linux/bitops.h>
69
70 #include <stdarg.h>
71
72 #include <asm/uaccess.h>
73 #include <asm/system.h>
74
75 #include <linux/errno.h>
76 #include <linux/fs.h>
77 #include <linux/ufs_fs.h>
78 #include <linux/slab.h>
79 #include <linux/time.h>
80 #include <linux/stat.h>
81 #include <linux/string.h>
82 #include <linux/blkdev.h>
83 #include <linux/init.h>
84 #include <linux/parser.h>
85 #include <linux/smp_lock.h>
86 #include <linux/buffer_head.h>
87 #include <linux/vfs.h>
88
89 #include "swab.h"
90 #include "util.h"
91
92 #ifdef CONFIG_UFS_DEBUG
93 /*
94 * Print contents of ufs_super_block, useful for debugging
95 */
96 static void ufs_print_super_stuff(struct super_block *sb, unsigned flags,
97 struct ufs_super_block_first *usb1,
98 struct ufs_super_block_second *usb2,
99 struct ufs_super_block_third *usb3)
100 {
101 printk("ufs_print_super_stuff\n");
102 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
103 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
104 printk(" fs_size: %llu\n", (unsigned long long)
105 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
106 printk(" fs_dsize: %llu\n", (unsigned long long)
107 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
108 printk(" bsize: %u\n",
109 fs32_to_cpu(sb, usb1->fs_bsize));
110 printk(" fsize: %u\n",
111 fs32_to_cpu(sb, usb1->fs_fsize));
112 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
113 printk(" fs_sblockloc: %llu\n", (unsigned long long)
114 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
115 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
116 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
117 printk(" cs_nbfree(No of free blocks): %llu\n",
118 (unsigned long long)
119 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
120 } else {
121 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
122 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
123 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
124 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
125 printk(" cgoffset: %u\n",
126 fs32_to_cpu(sb, usb1->fs_cgoffset));
127 printk(" ~cgmask: 0x%x\n",
128 ~fs32_to_cpu(sb, usb1->fs_cgmask));
129 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
130 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
131 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
132 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
133 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
134 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
135 printk(" fragshift: %u\n",
136 fs32_to_cpu(sb, usb1->fs_fragshift));
137 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
138 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
139 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
140 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
141 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
142 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
143 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
144 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
145 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
146 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
147 printk(" fstodb: %u\n",
148 fs32_to_cpu(sb, usb1->fs_fsbtodb));
149 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
150 printk(" ndir %u\n",
151 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
152 printk(" nifree %u\n",
153 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
154 printk(" nbfree %u\n",
155 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
156 printk(" nffree %u\n",
157 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
158 }
159 printk("\n");
160 }
161
162 /*
163 * Print contents of ufs_cylinder_group, useful for debugging
164 */
165 static void ufs_print_cylinder_stuff(struct super_block *sb,
166 struct ufs_cylinder_group *cg)
167 {
168 printk("\nufs_print_cylinder_stuff\n");
169 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
170 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
171 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
172 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
173 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
174 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
175 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
176 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
177 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
178 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
179 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
180 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
181 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
182 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
183 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
184 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
185 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
186 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
187 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
188 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
189 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
190 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
191 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
192 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
193 printk(" clustersumoff %u\n",
194 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
195 printk(" clusteroff %u\n",
196 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
197 printk(" nclusterblks %u\n",
198 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
199 printk("\n");
200 }
201 #else
202 # define ufs_print_super_stuff(sb, flags, usb1, usb2, usb3) /**/
203 # define ufs_print_cylinder_stuff(sb, cg) /**/
204 #endif /* CONFIG_UFS_DEBUG */
205
206 static struct super_operations ufs_super_ops;
207
208 static char error_buf[1024];
209
210 void ufs_error (struct super_block * sb, const char * function,
211 const char * fmt, ...)
212 {
213 struct ufs_sb_private_info * uspi;
214 struct ufs_super_block_first * usb1;
215 va_list args;
216
217 uspi = UFS_SB(sb)->s_uspi;
218 usb1 = ubh_get_usb_first(uspi);
219
220 if (!(sb->s_flags & MS_RDONLY)) {
221 usb1->fs_clean = UFS_FSBAD;
222 ubh_mark_buffer_dirty(USPI_UBH(uspi));
223 sb->s_dirt = 1;
224 sb->s_flags |= MS_RDONLY;
225 }
226 va_start (args, fmt);
227 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
228 va_end (args);
229 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
230 case UFS_MOUNT_ONERROR_PANIC:
231 panic ("UFS-fs panic (device %s): %s: %s\n",
232 sb->s_id, function, error_buf);
233
234 case UFS_MOUNT_ONERROR_LOCK:
235 case UFS_MOUNT_ONERROR_UMOUNT:
236 case UFS_MOUNT_ONERROR_REPAIR:
237 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
238 sb->s_id, function, error_buf);
239 }
240 }
241
242 void ufs_panic (struct super_block * sb, const char * function,
243 const char * fmt, ...)
244 {
245 struct ufs_sb_private_info * uspi;
246 struct ufs_super_block_first * usb1;
247 va_list args;
248
249 uspi = UFS_SB(sb)->s_uspi;
250 usb1 = ubh_get_usb_first(uspi);
251
252 if (!(sb->s_flags & MS_RDONLY)) {
253 usb1->fs_clean = UFS_FSBAD;
254 ubh_mark_buffer_dirty(USPI_UBH(uspi));
255 sb->s_dirt = 1;
256 }
257 va_start (args, fmt);
258 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
259 va_end (args);
260 sb->s_flags |= MS_RDONLY;
261 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
262 sb->s_id, function, error_buf);
263 }
264
265 void ufs_warning (struct super_block * sb, const char * function,
266 const char * fmt, ...)
267 {
268 va_list args;
269
270 va_start (args, fmt);
271 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
272 va_end (args);
273 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
274 sb->s_id, function, error_buf);
275 }
276
277 enum {
278 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
279 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
280 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
281 Opt_onerror_umount, Opt_onerror_repair, Opt_err
282 };
283
284 static match_table_t tokens = {
285 {Opt_type_old, "ufstype=old"},
286 {Opt_type_sunx86, "ufstype=sunx86"},
287 {Opt_type_sun, "ufstype=sun"},
288 {Opt_type_44bsd, "ufstype=44bsd"},
289 {Opt_type_ufs2, "ufstype=ufs2"},
290 {Opt_type_ufs2, "ufstype=5xbsd"},
291 {Opt_type_hp, "ufstype=hp"},
292 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
293 {Opt_type_nextstep, "ufstype=nextstep"},
294 {Opt_type_openstep, "ufstype=openstep"},
295 {Opt_onerror_panic, "onerror=panic"},
296 {Opt_onerror_lock, "onerror=lock"},
297 {Opt_onerror_umount, "onerror=umount"},
298 {Opt_onerror_repair, "onerror=repair"},
299 {Opt_err, NULL}
300 };
301
302 static int ufs_parse_options (char * options, unsigned * mount_options)
303 {
304 char * p;
305
306 UFSD("ENTER\n");
307
308 if (!options)
309 return 1;
310
311 while ((p = strsep(&options, ",")) != NULL) {
312 substring_t args[MAX_OPT_ARGS];
313 int token;
314 if (!*p)
315 continue;
316
317 token = match_token(p, tokens, args);
318 switch (token) {
319 case Opt_type_old:
320 ufs_clear_opt (*mount_options, UFSTYPE);
321 ufs_set_opt (*mount_options, UFSTYPE_OLD);
322 break;
323 case Opt_type_sunx86:
324 ufs_clear_opt (*mount_options, UFSTYPE);
325 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
326 break;
327 case Opt_type_sun:
328 ufs_clear_opt (*mount_options, UFSTYPE);
329 ufs_set_opt (*mount_options, UFSTYPE_SUN);
330 break;
331 case Opt_type_44bsd:
332 ufs_clear_opt (*mount_options, UFSTYPE);
333 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
334 break;
335 case Opt_type_ufs2:
336 ufs_clear_opt(*mount_options, UFSTYPE);
337 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
338 break;
339 case Opt_type_hp:
340 ufs_clear_opt (*mount_options, UFSTYPE);
341 ufs_set_opt (*mount_options, UFSTYPE_HP);
342 break;
343 case Opt_type_nextstepcd:
344 ufs_clear_opt (*mount_options, UFSTYPE);
345 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
346 break;
347 case Opt_type_nextstep:
348 ufs_clear_opt (*mount_options, UFSTYPE);
349 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
350 break;
351 case Opt_type_openstep:
352 ufs_clear_opt (*mount_options, UFSTYPE);
353 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
354 break;
355 case Opt_onerror_panic:
356 ufs_clear_opt (*mount_options, ONERROR);
357 ufs_set_opt (*mount_options, ONERROR_PANIC);
358 break;
359 case Opt_onerror_lock:
360 ufs_clear_opt (*mount_options, ONERROR);
361 ufs_set_opt (*mount_options, ONERROR_LOCK);
362 break;
363 case Opt_onerror_umount:
364 ufs_clear_opt (*mount_options, ONERROR);
365 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
366 break;
367 case Opt_onerror_repair:
368 printk("UFS-fs: Unable to do repair on error, "
369 "will lock lock instead\n");
370 ufs_clear_opt (*mount_options, ONERROR);
371 ufs_set_opt (*mount_options, ONERROR_REPAIR);
372 break;
373 default:
374 printk("UFS-fs: Invalid option: \"%s\" "
375 "or missing value\n", p);
376 return 0;
377 }
378 }
379 return 1;
380 }
381
382 /*
383 * Diffrent types of UFS hold fs_cstotal in different
384 * places, and use diffrent data structure for it.
385 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
386 */
387 static void ufs_setup_cstotal(struct super_block *sb)
388 {
389 struct ufs_sb_info *sbi = UFS_SB(sb);
390 struct ufs_sb_private_info *uspi = sbi->s_uspi;
391 struct ufs_super_block_first *usb1;
392 struct ufs_super_block_second *usb2;
393 struct ufs_super_block_third *usb3;
394 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
395
396 UFSD("ENTER, mtype=%u\n", mtype);
397 usb1 = ubh_get_usb_first(uspi);
398 usb2 = ubh_get_usb_second(uspi);
399 usb3 = ubh_get_usb_third(uspi);
400
401 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
402 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
403 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
404 /*we have statistic in different place, then usual*/
405 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
406 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
407 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
408 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
409 } else {
410 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
411 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
412 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
413 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
414 }
415 UFSD("EXIT\n");
416 }
417
418 /*
419 * Read on-disk structures associated with cylinder groups
420 */
421 static int ufs_read_cylinder_structures(struct super_block *sb)
422 {
423 struct ufs_sb_info *sbi = UFS_SB(sb);
424 struct ufs_sb_private_info *uspi = sbi->s_uspi;
425 unsigned flags = sbi->s_flags;
426 struct ufs_buffer_head * ubh;
427 unsigned char * base, * space;
428 unsigned size, blks, i;
429 struct ufs_super_block_third *usb3;
430
431 UFSD("ENTER\n");
432
433 usb3 = ubh_get_usb_third(uspi);
434 /*
435 * Read cs structures from (usually) first data block
436 * on the device.
437 */
438 size = uspi->s_cssize;
439 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
440 base = space = kmalloc(size, GFP_KERNEL);
441 if (!base)
442 goto failed;
443 sbi->s_csp = (struct ufs_csum *)space;
444 for (i = 0; i < blks; i += uspi->s_fpb) {
445 size = uspi->s_bsize;
446 if (i + uspi->s_fpb > blks)
447 size = (blks - i) * uspi->s_fsize;
448
449 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
450 ubh = ubh_bread(sb,
451 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr) + i, size);
452 else
453 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
454
455 if (!ubh)
456 goto failed;
457
458 ubh_ubhcpymem (space, ubh, size);
459
460 space += size;
461 ubh_brelse (ubh);
462 ubh = NULL;
463 }
464
465 /*
466 * Read cylinder group (we read only first fragment from block
467 * at this time) and prepare internal data structures for cg caching.
468 */
469 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
470 goto failed;
471 for (i = 0; i < uspi->s_ncg; i++)
472 sbi->s_ucg[i] = NULL;
473 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
474 sbi->s_ucpi[i] = NULL;
475 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
476 }
477 for (i = 0; i < uspi->s_ncg; i++) {
478 UFSD("read cg %u\n", i);
479 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
480 goto failed;
481 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
482 goto failed;
483
484 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
485 }
486 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
487 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
488 goto failed;
489 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
490 }
491 sbi->s_cg_loaded = 0;
492 UFSD("EXIT\n");
493 return 1;
494
495 failed:
496 kfree (base);
497 if (sbi->s_ucg) {
498 for (i = 0; i < uspi->s_ncg; i++)
499 if (sbi->s_ucg[i])
500 brelse (sbi->s_ucg[i]);
501 kfree (sbi->s_ucg);
502 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
503 kfree (sbi->s_ucpi[i]);
504 }
505 UFSD("EXIT (FAILED)\n");
506 return 0;
507 }
508
509 /*
510 * Sync our internal copy of fs_cstotal with disk
511 */
512 static void ufs_put_cstotal(struct super_block *sb)
513 {
514 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
515 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
516 struct ufs_super_block_first *usb1;
517 struct ufs_super_block_second *usb2;
518 struct ufs_super_block_third *usb3;
519
520 UFSD("ENTER\n");
521 usb1 = ubh_get_usb_first(uspi);
522 usb2 = ubh_get_usb_second(uspi);
523 usb3 = ubh_get_usb_third(uspi);
524
525 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
526 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
527 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
528 /*we have statistic in different place, then usual*/
529 usb2->fs_un.fs_u2.cs_ndir =
530 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
531 usb2->fs_un.fs_u2.cs_nbfree =
532 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
533 usb3->fs_un1.fs_u2.cs_nifree =
534 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
535 usb3->fs_un1.fs_u2.cs_nffree =
536 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
537 } else {
538 usb1->fs_cstotal.cs_ndir =
539 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
540 usb1->fs_cstotal.cs_nbfree =
541 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
542 usb1->fs_cstotal.cs_nifree =
543 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
544 usb1->fs_cstotal.cs_nffree =
545 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
546 }
547 ubh_mark_buffer_dirty(USPI_UBH(uspi));
548 UFSD("EXIT\n");
549 }
550
551 /**
552 * ufs_put_super_internal() - put on-disk intrenal structures
553 * @sb: pointer to super_block structure
554 * Put on-disk structures associated with cylinder groups
555 * and write them back to disk, also update cs_total on disk
556 */
557 static void ufs_put_super_internal(struct super_block *sb)
558 {
559 struct ufs_sb_info *sbi = UFS_SB(sb);
560 struct ufs_sb_private_info *uspi = sbi->s_uspi;
561 struct ufs_buffer_head * ubh;
562 unsigned char * base, * space;
563 unsigned blks, size, i;
564
565
566 UFSD("ENTER\n");
567 ufs_put_cstotal(sb);
568 size = uspi->s_cssize;
569 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
570 base = space = (char*) sbi->s_csp;
571 for (i = 0; i < blks; i += uspi->s_fpb) {
572 size = uspi->s_bsize;
573 if (i + uspi->s_fpb > blks)
574 size = (blks - i) * uspi->s_fsize;
575 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
576 ubh_memcpyubh (ubh, space, size);
577 space += size;
578 ubh_mark_buffer_uptodate (ubh, 1);
579 ubh_mark_buffer_dirty (ubh);
580 ubh_brelse (ubh);
581 }
582 for (i = 0; i < sbi->s_cg_loaded; i++) {
583 ufs_put_cylinder (sb, i);
584 kfree (sbi->s_ucpi[i]);
585 }
586 for (; i < UFS_MAX_GROUP_LOADED; i++)
587 kfree (sbi->s_ucpi[i]);
588 for (i = 0; i < uspi->s_ncg; i++)
589 brelse (sbi->s_ucg[i]);
590 kfree (sbi->s_ucg);
591 kfree (base);
592 UFSD("EXIT\n");
593 }
594
595 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
596 {
597 struct ufs_sb_info * sbi;
598 struct ufs_sb_private_info * uspi;
599 struct ufs_super_block_first * usb1;
600 struct ufs_super_block_second * usb2;
601 struct ufs_super_block_third * usb3;
602 struct ufs_buffer_head * ubh;
603 struct inode *inode;
604 unsigned block_size, super_block_size;
605 unsigned flags;
606 unsigned super_block_offset;
607
608 uspi = NULL;
609 ubh = NULL;
610 flags = 0;
611
612 UFSD("ENTER\n");
613
614 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
615 if (!sbi)
616 goto failed_nomem;
617 sb->s_fs_info = sbi;
618
619 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
620
621 #ifndef CONFIG_UFS_FS_WRITE
622 if (!(sb->s_flags & MS_RDONLY)) {
623 printk("ufs was compiled with read-only support, "
624 "can't be mounted as read-write\n");
625 goto failed;
626 }
627 #endif
628 /*
629 * Set default mount options
630 * Parse mount options
631 */
632 sbi->s_mount_opt = 0;
633 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
634 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
635 printk("wrong mount options\n");
636 goto failed;
637 }
638 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
639 if (!silent)
640 printk("You didn't specify the type of your ufs filesystem\n\n"
641 "mount -t ufs -o ufstype="
642 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
643 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
644 "default is ufstype=old\n");
645 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
646 }
647
648 sbi->s_uspi = uspi =
649 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
650 if (!uspi)
651 goto failed;
652
653 super_block_offset=UFS_SBLOCK;
654
655 /* Keep 2Gig file limit. Some UFS variants need to override
656 this but as I don't know which I'll let those in the know loosen
657 the rules */
658 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
659 case UFS_MOUNT_UFSTYPE_44BSD:
660 UFSD("ufstype=44bsd\n");
661 uspi->s_fsize = block_size = 512;
662 uspi->s_fmask = ~(512 - 1);
663 uspi->s_fshift = 9;
664 uspi->s_sbsize = super_block_size = 1536;
665 uspi->s_sbbase = 0;
666 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
667 break;
668 case UFS_MOUNT_UFSTYPE_UFS2:
669 UFSD("ufstype=ufs2\n");
670 super_block_offset=SBLOCK_UFS2;
671 uspi->s_fsize = block_size = 512;
672 uspi->s_fmask = ~(512 - 1);
673 uspi->s_fshift = 9;
674 uspi->s_sbsize = super_block_size = 1536;
675 uspi->s_sbbase = 0;
676 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
677 if (!(sb->s_flags & MS_RDONLY)) {
678 printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
679 sb->s_flags |= MS_RDONLY;
680 }
681 break;
682
683 case UFS_MOUNT_UFSTYPE_SUN:
684 UFSD("ufstype=sun\n");
685 uspi->s_fsize = block_size = 1024;
686 uspi->s_fmask = ~(1024 - 1);
687 uspi->s_fshift = 10;
688 uspi->s_sbsize = super_block_size = 2048;
689 uspi->s_sbbase = 0;
690 uspi->s_maxsymlinklen = 56;
691 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
692 break;
693
694 case UFS_MOUNT_UFSTYPE_SUNx86:
695 UFSD("ufstype=sunx86\n");
696 uspi->s_fsize = block_size = 1024;
697 uspi->s_fmask = ~(1024 - 1);
698 uspi->s_fshift = 10;
699 uspi->s_sbsize = super_block_size = 2048;
700 uspi->s_sbbase = 0;
701 uspi->s_maxsymlinklen = 56;
702 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
703 break;
704
705 case UFS_MOUNT_UFSTYPE_OLD:
706 UFSD("ufstype=old\n");
707 uspi->s_fsize = block_size = 1024;
708 uspi->s_fmask = ~(1024 - 1);
709 uspi->s_fshift = 10;
710 uspi->s_sbsize = super_block_size = 2048;
711 uspi->s_sbbase = 0;
712 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
713 if (!(sb->s_flags & MS_RDONLY)) {
714 if (!silent)
715 printk(KERN_INFO "ufstype=old is supported read-only\n");
716 sb->s_flags |= MS_RDONLY;
717 }
718 break;
719
720 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
721 UFSD("ufstype=nextstep\n");
722 uspi->s_fsize = block_size = 1024;
723 uspi->s_fmask = ~(1024 - 1);
724 uspi->s_fshift = 10;
725 uspi->s_sbsize = super_block_size = 2048;
726 uspi->s_sbbase = 0;
727 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
728 if (!(sb->s_flags & MS_RDONLY)) {
729 if (!silent)
730 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
731 sb->s_flags |= MS_RDONLY;
732 }
733 break;
734
735 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
736 UFSD("ufstype=nextstep-cd\n");
737 uspi->s_fsize = block_size = 2048;
738 uspi->s_fmask = ~(2048 - 1);
739 uspi->s_fshift = 11;
740 uspi->s_sbsize = super_block_size = 2048;
741 uspi->s_sbbase = 0;
742 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
743 if (!(sb->s_flags & MS_RDONLY)) {
744 if (!silent)
745 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
746 sb->s_flags |= MS_RDONLY;
747 }
748 break;
749
750 case UFS_MOUNT_UFSTYPE_OPENSTEP:
751 UFSD("ufstype=openstep\n");
752 uspi->s_fsize = block_size = 1024;
753 uspi->s_fmask = ~(1024 - 1);
754 uspi->s_fshift = 10;
755 uspi->s_sbsize = super_block_size = 2048;
756 uspi->s_sbbase = 0;
757 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
758 if (!(sb->s_flags & MS_RDONLY)) {
759 if (!silent)
760 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
761 sb->s_flags |= MS_RDONLY;
762 }
763 break;
764
765 case UFS_MOUNT_UFSTYPE_HP:
766 UFSD("ufstype=hp\n");
767 uspi->s_fsize = block_size = 1024;
768 uspi->s_fmask = ~(1024 - 1);
769 uspi->s_fshift = 10;
770 uspi->s_sbsize = super_block_size = 2048;
771 uspi->s_sbbase = 0;
772 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
773 if (!(sb->s_flags & MS_RDONLY)) {
774 if (!silent)
775 printk(KERN_INFO "ufstype=hp is supported read-only\n");
776 sb->s_flags |= MS_RDONLY;
777 }
778 break;
779 default:
780 if (!silent)
781 printk("unknown ufstype\n");
782 goto failed;
783 }
784
785 again:
786 if (!sb_set_blocksize(sb, block_size)) {
787 printk(KERN_ERR "UFS: failed to set blocksize\n");
788 goto failed;
789 }
790
791 /*
792 * read ufs super block from device
793 */
794
795 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
796
797 if (!ubh)
798 goto failed;
799
800
801 usb1 = ubh_get_usb_first(uspi);
802 usb2 = ubh_get_usb_second(uspi);
803 usb3 = ubh_get_usb_third(uspi);
804
805 /*
806 * Check ufs magic number
807 */
808 sbi->s_bytesex = BYTESEX_LE;
809 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
810 case UFS_MAGIC:
811 case UFS2_MAGIC:
812 case UFS_MAGIC_LFN:
813 case UFS_MAGIC_FEA:
814 case UFS_MAGIC_4GB:
815 goto magic_found;
816 }
817 sbi->s_bytesex = BYTESEX_BE;
818 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
819 case UFS_MAGIC:
820 case UFS2_MAGIC:
821 case UFS_MAGIC_LFN:
822 case UFS_MAGIC_FEA:
823 case UFS_MAGIC_4GB:
824 goto magic_found;
825 }
826
827 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
828 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
829 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
830 && uspi->s_sbbase < 256) {
831 ubh_brelse_uspi(uspi);
832 ubh = NULL;
833 uspi->s_sbbase += 8;
834 goto again;
835 }
836 if (!silent)
837 printk("ufs_read_super: bad magic number\n");
838 goto failed;
839
840 magic_found:
841 /*
842 * Check block and fragment sizes
843 */
844 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
845 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
846 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
847 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
848 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
849
850 if (uspi->s_fsize & (uspi->s_fsize - 1)) {
851 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
852 uspi->s_fsize);
853 goto failed;
854 }
855 if (uspi->s_fsize < 512) {
856 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
857 uspi->s_fsize);
858 goto failed;
859 }
860 if (uspi->s_fsize > 4096) {
861 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
862 uspi->s_fsize);
863 goto failed;
864 }
865 if (uspi->s_bsize & (uspi->s_bsize - 1)) {
866 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
867 uspi->s_bsize);
868 goto failed;
869 }
870 if (uspi->s_bsize < 4096) {
871 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
872 uspi->s_bsize);
873 goto failed;
874 }
875 if (uspi->s_bsize / uspi->s_fsize > 8) {
876 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
877 uspi->s_bsize / uspi->s_fsize);
878 goto failed;
879 }
880 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
881 ubh_brelse_uspi(uspi);
882 ubh = NULL;
883 block_size = uspi->s_fsize;
884 super_block_size = uspi->s_sbsize;
885 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
886 goto again;
887 }
888
889
890 ufs_print_super_stuff(sb, flags, usb1, usb2, usb3);
891
892 /*
893 * Check, if file system was correctly unmounted.
894 * If not, make it read only.
895 */
896 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
897 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
898 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
899 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
900 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
901 switch(usb1->fs_clean) {
902 case UFS_FSCLEAN:
903 UFSD("fs is clean\n");
904 break;
905 case UFS_FSSTABLE:
906 UFSD("fs is stable\n");
907 break;
908 case UFS_FSOSF1:
909 UFSD("fs is DEC OSF/1\n");
910 break;
911 case UFS_FSACTIVE:
912 printk("ufs_read_super: fs is active\n");
913 sb->s_flags |= MS_RDONLY;
914 break;
915 case UFS_FSBAD:
916 printk("ufs_read_super: fs is bad\n");
917 sb->s_flags |= MS_RDONLY;
918 break;
919 default:
920 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
921 sb->s_flags |= MS_RDONLY;
922 break;
923 }
924 } else {
925 printk("ufs_read_super: fs needs fsck\n");
926 sb->s_flags |= MS_RDONLY;
927 }
928
929 /*
930 * Read ufs_super_block into internal data structures
931 */
932 sb->s_op = &ufs_super_ops;
933 sb->dq_op = NULL; /***/
934 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
935
936 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
937 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
938 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
939 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
940 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
941 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
942
943 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
944 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
945 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
946 } else {
947 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
948 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
949 }
950
951 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
952 /* s_bsize already set */
953 /* s_fsize already set */
954 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
955 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
956 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
957 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
958 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
959 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
960 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
961 uspi->s_fshift);
962 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
963 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
964 /* s_sbsize already set */
965 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
966 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
967 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
968 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
969 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
970 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
971 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
972 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
973 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
974 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
975 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
976 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
977 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
978 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
979 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
980 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
981 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
982 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
983 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
984 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
985 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
986 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
987 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
988 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
989
990 /*
991 * Compute another frequently used values
992 */
993 uspi->s_fpbmask = uspi->s_fpb - 1;
994 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
995 uspi->s_apbshift = uspi->s_bshift - 3;
996 else
997 uspi->s_apbshift = uspi->s_bshift - 2;
998
999 uspi->s_2apbshift = uspi->s_apbshift * 2;
1000 uspi->s_3apbshift = uspi->s_apbshift * 3;
1001 uspi->s_apb = 1 << uspi->s_apbshift;
1002 uspi->s_2apb = 1 << uspi->s_2apbshift;
1003 uspi->s_3apb = 1 << uspi->s_3apbshift;
1004 uspi->s_apbmask = uspi->s_apb - 1;
1005 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1006 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1007 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1008 uspi->s_bpf = uspi->s_fsize << 3;
1009 uspi->s_bpfshift = uspi->s_fshift + 3;
1010 uspi->s_bpfmask = uspi->s_bpf - 1;
1011 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1012 UFS_MOUNT_UFSTYPE_44BSD)
1013 uspi->s_maxsymlinklen =
1014 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1015
1016 sbi->s_flags = flags;
1017
1018 inode = iget(sb, UFS_ROOTINO);
1019 if (!inode || is_bad_inode(inode))
1020 goto failed;
1021 sb->s_root = d_alloc_root(inode);
1022 if (!sb->s_root)
1023 goto dalloc_failed;
1024
1025 ufs_setup_cstotal(sb);
1026 /*
1027 * Read cylinder group structures
1028 */
1029 if (!(sb->s_flags & MS_RDONLY))
1030 if (!ufs_read_cylinder_structures(sb))
1031 goto failed;
1032
1033 UFSD("EXIT\n");
1034 return 0;
1035
1036 dalloc_failed:
1037 iput(inode);
1038 failed:
1039 if (ubh)
1040 ubh_brelse_uspi (uspi);
1041 kfree (uspi);
1042 kfree(sbi);
1043 sb->s_fs_info = NULL;
1044 UFSD("EXIT (FAILED)\n");
1045 return -EINVAL;
1046
1047 failed_nomem:
1048 UFSD("EXIT (NOMEM)\n");
1049 return -ENOMEM;
1050 }
1051
1052 static void ufs_write_super(struct super_block *sb)
1053 {
1054 struct ufs_sb_private_info * uspi;
1055 struct ufs_super_block_first * usb1;
1056 struct ufs_super_block_third * usb3;
1057 unsigned flags;
1058
1059 lock_kernel();
1060
1061 UFSD("ENTER\n");
1062 flags = UFS_SB(sb)->s_flags;
1063 uspi = UFS_SB(sb)->s_uspi;
1064 usb1 = ubh_get_usb_first(uspi);
1065 usb3 = ubh_get_usb_third(uspi);
1066
1067 if (!(sb->s_flags & MS_RDONLY)) {
1068 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1069 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1070 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1071 ufs_set_fs_state(sb, usb1, usb3,
1072 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1073 ufs_put_cstotal(sb);
1074 }
1075 sb->s_dirt = 0;
1076 UFSD("EXIT\n");
1077 unlock_kernel();
1078 }
1079
1080 static void ufs_put_super(struct super_block *sb)
1081 {
1082 struct ufs_sb_info * sbi = UFS_SB(sb);
1083
1084 UFSD("ENTER\n");
1085
1086 if (!(sb->s_flags & MS_RDONLY))
1087 ufs_put_super_internal(sb);
1088
1089 ubh_brelse_uspi (sbi->s_uspi);
1090 kfree (sbi->s_uspi);
1091 kfree (sbi);
1092 sb->s_fs_info = NULL;
1093 UFSD("EXIT\n");
1094 return;
1095 }
1096
1097
1098 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1099 {
1100 struct ufs_sb_private_info * uspi;
1101 struct ufs_super_block_first * usb1;
1102 struct ufs_super_block_third * usb3;
1103 unsigned new_mount_opt, ufstype;
1104 unsigned flags;
1105
1106 uspi = UFS_SB(sb)->s_uspi;
1107 flags = UFS_SB(sb)->s_flags;
1108 usb1 = ubh_get_usb_first(uspi);
1109 usb3 = ubh_get_usb_third(uspi);
1110
1111 /*
1112 * Allow the "check" option to be passed as a remount option.
1113 * It is not possible to change ufstype option during remount
1114 */
1115 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1116 new_mount_opt = 0;
1117 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1118 if (!ufs_parse_options (data, &new_mount_opt))
1119 return -EINVAL;
1120 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1121 new_mount_opt |= ufstype;
1122 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1123 printk("ufstype can't be changed during remount\n");
1124 return -EINVAL;
1125 }
1126
1127 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1128 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1129 return 0;
1130 }
1131
1132 /*
1133 * fs was mouted as rw, remounting ro
1134 */
1135 if (*mount_flags & MS_RDONLY) {
1136 ufs_put_super_internal(sb);
1137 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1138 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1139 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1140 ufs_set_fs_state(sb, usb1, usb3,
1141 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1142 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1143 sb->s_dirt = 0;
1144 sb->s_flags |= MS_RDONLY;
1145 } else {
1146 /*
1147 * fs was mounted as ro, remounting rw
1148 */
1149 #ifndef CONFIG_UFS_FS_WRITE
1150 printk("ufs was compiled with read-only support, "
1151 "can't be mounted as read-write\n");
1152 return -EINVAL;
1153 #else
1154 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1155 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1156 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1157 printk("this ufstype is read-only supported\n");
1158 return -EINVAL;
1159 }
1160 if (!ufs_read_cylinder_structures(sb)) {
1161 printk("failed during remounting\n");
1162 return -EPERM;
1163 }
1164 sb->s_flags &= ~MS_RDONLY;
1165 #endif
1166 }
1167 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1168 return 0;
1169 }
1170
1171 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1172 {
1173 struct super_block *sb = dentry->d_sb;
1174 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1175 unsigned flags = UFS_SB(sb)->s_flags;
1176 struct ufs_super_block_first *usb1;
1177 struct ufs_super_block_second *usb2;
1178 struct ufs_super_block_third *usb3;
1179
1180 lock_kernel();
1181
1182 usb1 = ubh_get_usb_first(uspi);
1183 usb2 = ubh_get_usb_second(uspi);
1184 usb3 = ubh_get_usb_third(uspi);
1185
1186 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1187 buf->f_type = UFS2_MAGIC;
1188 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1189 } else {
1190 buf->f_type = UFS_MAGIC;
1191 buf->f_blocks = uspi->s_dsize;
1192 }
1193 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1194 uspi->cs_total.cs_nffree;
1195 buf->f_ffree = uspi->cs_total.cs_nifree;
1196 buf->f_bsize = sb->s_blocksize;
1197 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1198 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1199 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1200 buf->f_namelen = UFS_MAXNAMLEN;
1201
1202 unlock_kernel();
1203
1204 return 0;
1205 }
1206
1207 static struct kmem_cache * ufs_inode_cachep;
1208
1209 static struct inode *ufs_alloc_inode(struct super_block *sb)
1210 {
1211 struct ufs_inode_info *ei;
1212 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1213 if (!ei)
1214 return NULL;
1215 ei->vfs_inode.i_version = 1;
1216 return &ei->vfs_inode;
1217 }
1218
1219 static void ufs_destroy_inode(struct inode *inode)
1220 {
1221 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1222 }
1223
1224 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
1225 {
1226 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1227
1228 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1229 SLAB_CTOR_CONSTRUCTOR)
1230 inode_init_once(&ei->vfs_inode);
1231 }
1232
1233 static int init_inodecache(void)
1234 {
1235 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1236 sizeof(struct ufs_inode_info),
1237 0, (SLAB_RECLAIM_ACCOUNT|
1238 SLAB_MEM_SPREAD),
1239 init_once, NULL);
1240 if (ufs_inode_cachep == NULL)
1241 return -ENOMEM;
1242 return 0;
1243 }
1244
1245 static void destroy_inodecache(void)
1246 {
1247 kmem_cache_destroy(ufs_inode_cachep);
1248 }
1249
1250 #ifdef CONFIG_QUOTA
1251 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1252 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1253 #endif
1254
1255 static struct super_operations ufs_super_ops = {
1256 .alloc_inode = ufs_alloc_inode,
1257 .destroy_inode = ufs_destroy_inode,
1258 .read_inode = ufs_read_inode,
1259 .write_inode = ufs_write_inode,
1260 .delete_inode = ufs_delete_inode,
1261 .put_super = ufs_put_super,
1262 .write_super = ufs_write_super,
1263 .statfs = ufs_statfs,
1264 .remount_fs = ufs_remount,
1265 #ifdef CONFIG_QUOTA
1266 .quota_read = ufs_quota_read,
1267 .quota_write = ufs_quota_write,
1268 #endif
1269 };
1270
1271 #ifdef CONFIG_QUOTA
1272
1273 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1274 * acquiring the locks... As quota files are never truncated and quota code
1275 * itself serializes the operations (and noone else should touch the files)
1276 * we don't have to be afraid of races */
1277 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1278 size_t len, loff_t off)
1279 {
1280 struct inode *inode = sb_dqopt(sb)->files[type];
1281 sector_t blk = off >> sb->s_blocksize_bits;
1282 int err = 0;
1283 int offset = off & (sb->s_blocksize - 1);
1284 int tocopy;
1285 size_t toread;
1286 struct buffer_head *bh;
1287 loff_t i_size = i_size_read(inode);
1288
1289 if (off > i_size)
1290 return 0;
1291 if (off+len > i_size)
1292 len = i_size-off;
1293 toread = len;
1294 while (toread > 0) {
1295 tocopy = sb->s_blocksize - offset < toread ?
1296 sb->s_blocksize - offset : toread;
1297
1298 bh = ufs_bread(inode, blk, 0, &err);
1299 if (err)
1300 return err;
1301 if (!bh) /* A hole? */
1302 memset(data, 0, tocopy);
1303 else {
1304 memcpy(data, bh->b_data+offset, tocopy);
1305 brelse(bh);
1306 }
1307 offset = 0;
1308 toread -= tocopy;
1309 data += tocopy;
1310 blk++;
1311 }
1312 return len;
1313 }
1314
1315 /* Write to quotafile */
1316 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1317 const char *data, size_t len, loff_t off)
1318 {
1319 struct inode *inode = sb_dqopt(sb)->files[type];
1320 sector_t blk = off >> sb->s_blocksize_bits;
1321 int err = 0;
1322 int offset = off & (sb->s_blocksize - 1);
1323 int tocopy;
1324 size_t towrite = len;
1325 struct buffer_head *bh;
1326
1327 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1328 while (towrite > 0) {
1329 tocopy = sb->s_blocksize - offset < towrite ?
1330 sb->s_blocksize - offset : towrite;
1331
1332 bh = ufs_bread(inode, blk, 1, &err);
1333 if (!bh)
1334 goto out;
1335 lock_buffer(bh);
1336 memcpy(bh->b_data+offset, data, tocopy);
1337 flush_dcache_page(bh->b_page);
1338 set_buffer_uptodate(bh);
1339 mark_buffer_dirty(bh);
1340 unlock_buffer(bh);
1341 brelse(bh);
1342 offset = 0;
1343 towrite -= tocopy;
1344 data += tocopy;
1345 blk++;
1346 }
1347 out:
1348 if (len == towrite) {
1349 mutex_unlock(&inode->i_mutex);
1350 return err;
1351 }
1352 if (inode->i_size < off+len-towrite)
1353 i_size_write(inode, off+len-towrite);
1354 inode->i_version++;
1355 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1356 mark_inode_dirty(inode);
1357 mutex_unlock(&inode->i_mutex);
1358 return len - towrite;
1359 }
1360
1361 #endif
1362
1363 static int ufs_get_sb(struct file_system_type *fs_type,
1364 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1365 {
1366 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1367 }
1368
1369 static struct file_system_type ufs_fs_type = {
1370 .owner = THIS_MODULE,
1371 .name = "ufs",
1372 .get_sb = ufs_get_sb,
1373 .kill_sb = kill_block_super,
1374 .fs_flags = FS_REQUIRES_DEV,
1375 };
1376
1377 static int __init init_ufs_fs(void)
1378 {
1379 int err = init_inodecache();
1380 if (err)
1381 goto out1;
1382 err = register_filesystem(&ufs_fs_type);
1383 if (err)
1384 goto out;
1385 return 0;
1386 out:
1387 destroy_inodecache();
1388 out1:
1389 return err;
1390 }
1391
1392 static void __exit exit_ufs_fs(void)
1393 {
1394 unregister_filesystem(&ufs_fs_type);
1395 destroy_inodecache();
1396 }
1397
1398 module_init(init_ufs_fs)
1399 module_exit(exit_ufs_fs)
1400 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree