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inotify: fix race
[linux-2.6.22.y-op.git] / fs / ufs / super.c
blob22ff6ed55ce9a2d685024bfadf3aabb1eed68fa5
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
91 #include "swab.h"
92 #include "util.h"
93
94 #ifdef CONFIG_UFS_DEBUG
95 /*
96 * Print contents of ufs_super_block, useful for debugging
97 */
98 static void ufs_print_super_stuff(struct super_block *sb,
99 struct ufs_super_block_first *usb1,
100 struct ufs_super_block_second *usb2,
101 struct ufs_super_block_third *usb3)
102 {
103 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
104
105 printk("ufs_print_super_stuff\n");
106 printk(" magic: 0x%x\n", magic);
107 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
108 printk(" fs_size: %llu\n", (unsigned long long)
109 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
110 printk(" fs_dsize: %llu\n", (unsigned long long)
111 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
112 printk(" bsize: %u\n",
113 fs32_to_cpu(sb, usb1->fs_bsize));
114 printk(" fsize: %u\n",
115 fs32_to_cpu(sb, usb1->fs_fsize));
116 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
117 printk(" fs_sblockloc: %llu\n", (unsigned long long)
118 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
119 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
120 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
121 printk(" cs_nbfree(No of free blocks): %llu\n",
122 (unsigned long long)
123 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
124 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
125 (unsigned long long)
126 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
127 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
128 (unsigned long long)
129 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
130 } else {
131 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
132 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
133 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
134 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
135 printk(" cgoffset: %u\n",
136 fs32_to_cpu(sb, usb1->fs_cgoffset));
137 printk(" ~cgmask: 0x%x\n",
138 ~fs32_to_cpu(sb, usb1->fs_cgmask));
139 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
140 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
141 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
142 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
143 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
144 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
145 printk(" fragshift: %u\n",
146 fs32_to_cpu(sb, usb1->fs_fragshift));
147 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
148 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
149 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
150 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
151 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
152 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
153 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
154 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
155 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
156 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
157 printk(" fstodb: %u\n",
158 fs32_to_cpu(sb, usb1->fs_fsbtodb));
159 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
160 printk(" ndir %u\n",
161 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
162 printk(" nifree %u\n",
163 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
164 printk(" nbfree %u\n",
165 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
166 printk(" nffree %u\n",
167 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
168 }
169 printk("\n");
170 }
171
172 /*
173 * Print contents of ufs_cylinder_group, useful for debugging
174 */
175 static void ufs_print_cylinder_stuff(struct super_block *sb,
176 struct ufs_cylinder_group *cg)
177 {
178 printk("\nufs_print_cylinder_stuff\n");
179 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
180 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
181 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
182 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
183 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
184 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
185 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
186 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
187 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
188 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
189 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
190 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
191 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
192 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
193 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
194 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
195 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
196 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
197 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
198 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
199 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
200 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
201 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
202 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
203 printk(" clustersumoff %u\n",
204 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
205 printk(" clusteroff %u\n",
206 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
207 printk(" nclusterblks %u\n",
208 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
209 printk("\n");
210 }
211 #else
212 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
213 # define ufs_print_cylinder_stuff(sb, cg) /**/
214 #endif /* CONFIG_UFS_DEBUG */
215
216 static const struct super_operations ufs_super_ops;
217
218 static char error_buf[1024];
219
220 void ufs_error (struct super_block * sb, const char * function,
221 const char * fmt, ...)
222 {
223 struct ufs_sb_private_info * uspi;
224 struct ufs_super_block_first * usb1;
225 va_list args;
226
227 uspi = UFS_SB(sb)->s_uspi;
228 usb1 = ubh_get_usb_first(uspi);
229
230 if (!(sb->s_flags & MS_RDONLY)) {
231 usb1->fs_clean = UFS_FSBAD;
232 ubh_mark_buffer_dirty(USPI_UBH(uspi));
233 sb->s_dirt = 1;
234 sb->s_flags |= MS_RDONLY;
235 }
236 va_start (args, fmt);
237 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
238 va_end (args);
239 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
240 case UFS_MOUNT_ONERROR_PANIC:
241 panic ("UFS-fs panic (device %s): %s: %s\n",
242 sb->s_id, function, error_buf);
243
244 case UFS_MOUNT_ONERROR_LOCK:
245 case UFS_MOUNT_ONERROR_UMOUNT:
246 case UFS_MOUNT_ONERROR_REPAIR:
247 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
248 sb->s_id, function, error_buf);
249 }
250 }
251
252 void ufs_panic (struct super_block * sb, const char * function,
253 const char * fmt, ...)
254 {
255 struct ufs_sb_private_info * uspi;
256 struct ufs_super_block_first * usb1;
257 va_list args;
258
259 uspi = UFS_SB(sb)->s_uspi;
260 usb1 = ubh_get_usb_first(uspi);
261
262 if (!(sb->s_flags & MS_RDONLY)) {
263 usb1->fs_clean = UFS_FSBAD;
264 ubh_mark_buffer_dirty(USPI_UBH(uspi));
265 sb->s_dirt = 1;
266 }
267 va_start (args, fmt);
268 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
269 va_end (args);
270 sb->s_flags |= MS_RDONLY;
271 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
272 sb->s_id, function, error_buf);
273 }
274
275 void ufs_warning (struct super_block * sb, const char * function,
276 const char * fmt, ...)
277 {
278 va_list args;
279
280 va_start (args, fmt);
281 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
282 va_end (args);
283 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
284 sb->s_id, function, error_buf);
285 }
286
287 enum {
288 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
289 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
290 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
291 Opt_onerror_umount, Opt_onerror_repair, Opt_err
292 };
293
294 static match_table_t tokens = {
295 {Opt_type_old, "ufstype=old"},
296 {Opt_type_sunx86, "ufstype=sunx86"},
297 {Opt_type_sun, "ufstype=sun"},
298 {Opt_type_44bsd, "ufstype=44bsd"},
299 {Opt_type_ufs2, "ufstype=ufs2"},
300 {Opt_type_ufs2, "ufstype=5xbsd"},
301 {Opt_type_hp, "ufstype=hp"},
302 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
303 {Opt_type_nextstep, "ufstype=nextstep"},
304 {Opt_type_openstep, "ufstype=openstep"},
305 {Opt_onerror_panic, "onerror=panic"},
306 {Opt_onerror_lock, "onerror=lock"},
307 {Opt_onerror_umount, "onerror=umount"},
308 {Opt_onerror_repair, "onerror=repair"},
309 {Opt_err, NULL}
310 };
311
312 static int ufs_parse_options (char * options, unsigned * mount_options)
313 {
314 char * p;
315
316 UFSD("ENTER\n");
317
318 if (!options)
319 return 1;
320
321 while ((p = strsep(&options, ",")) != NULL) {
322 substring_t args[MAX_OPT_ARGS];
323 int token;
324 if (!*p)
325 continue;
326
327 token = match_token(p, tokens, args);
328 switch (token) {
329 case Opt_type_old:
330 ufs_clear_opt (*mount_options, UFSTYPE);
331 ufs_set_opt (*mount_options, UFSTYPE_OLD);
332 break;
333 case Opt_type_sunx86:
334 ufs_clear_opt (*mount_options, UFSTYPE);
335 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
336 break;
337 case Opt_type_sun:
338 ufs_clear_opt (*mount_options, UFSTYPE);
339 ufs_set_opt (*mount_options, UFSTYPE_SUN);
340 break;
341 case Opt_type_44bsd:
342 ufs_clear_opt (*mount_options, UFSTYPE);
343 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
344 break;
345 case Opt_type_ufs2:
346 ufs_clear_opt(*mount_options, UFSTYPE);
347 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
348 break;
349 case Opt_type_hp:
350 ufs_clear_opt (*mount_options, UFSTYPE);
351 ufs_set_opt (*mount_options, UFSTYPE_HP);
352 break;
353 case Opt_type_nextstepcd:
354 ufs_clear_opt (*mount_options, UFSTYPE);
355 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
356 break;
357 case Opt_type_nextstep:
358 ufs_clear_opt (*mount_options, UFSTYPE);
359 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
360 break;
361 case Opt_type_openstep:
362 ufs_clear_opt (*mount_options, UFSTYPE);
363 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
364 break;
365 case Opt_onerror_panic:
366 ufs_clear_opt (*mount_options, ONERROR);
367 ufs_set_opt (*mount_options, ONERROR_PANIC);
368 break;
369 case Opt_onerror_lock:
370 ufs_clear_opt (*mount_options, ONERROR);
371 ufs_set_opt (*mount_options, ONERROR_LOCK);
372 break;
373 case Opt_onerror_umount:
374 ufs_clear_opt (*mount_options, ONERROR);
375 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
376 break;
377 case Opt_onerror_repair:
378 printk("UFS-fs: Unable to do repair on error, "
379 "will lock lock instead\n");
380 ufs_clear_opt (*mount_options, ONERROR);
381 ufs_set_opt (*mount_options, ONERROR_REPAIR);
382 break;
383 default:
384 printk("UFS-fs: Invalid option: \"%s\" "
385 "or missing value\n", p);
386 return 0;
387 }
388 }
389 return 1;
390 }
391
392 /*
393 * Diffrent types of UFS hold fs_cstotal in different
394 * places, and use diffrent data structure for it.
395 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
396 */
397 static void ufs_setup_cstotal(struct super_block *sb)
398 {
399 struct ufs_sb_info *sbi = UFS_SB(sb);
400 struct ufs_sb_private_info *uspi = sbi->s_uspi;
401 struct ufs_super_block_first *usb1;
402 struct ufs_super_block_second *usb2;
403 struct ufs_super_block_third *usb3;
404 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
405
406 UFSD("ENTER, mtype=%u\n", mtype);
407 usb1 = ubh_get_usb_first(uspi);
408 usb2 = ubh_get_usb_second(uspi);
409 usb3 = ubh_get_usb_third(uspi);
410
411 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
412 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
413 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
414 /*we have statistic in different place, then usual*/
415 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
416 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
417 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
418 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
419 } else {
420 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
421 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
422 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
423 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
424 }
425 UFSD("EXIT\n");
426 }
427
428 /*
429 * Read on-disk structures associated with cylinder groups
430 */
431 static int ufs_read_cylinder_structures(struct super_block *sb)
432 {
433 struct ufs_sb_info *sbi = UFS_SB(sb);
434 struct ufs_sb_private_info *uspi = sbi->s_uspi;
435 struct ufs_buffer_head * ubh;
436 unsigned char * base, * space;
437 unsigned size, blks, i;
438 struct ufs_super_block_third *usb3;
439
440 UFSD("ENTER\n");
441
442 usb3 = ubh_get_usb_third(uspi);
443 /*
444 * Read cs structures from (usually) first data block
445 * on the device.
446 */
447 size = uspi->s_cssize;
448 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
449 base = space = kmalloc(size, GFP_KERNEL);
450 if (!base)
451 goto failed;
452 sbi->s_csp = (struct ufs_csum *)space;
453 for (i = 0; i < blks; i += uspi->s_fpb) {
454 size = uspi->s_bsize;
455 if (i + uspi->s_fpb > blks)
456 size = (blks - i) * uspi->s_fsize;
457
458 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
459
460 if (!ubh)
461 goto failed;
462
463 ubh_ubhcpymem (space, ubh, size);
464
465 space += size;
466 ubh_brelse (ubh);
467 ubh = NULL;
468 }
469
470 /*
471 * Read cylinder group (we read only first fragment from block
472 * at this time) and prepare internal data structures for cg caching.
473 */
474 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
475 goto failed;
476 for (i = 0; i < uspi->s_ncg; i++)
477 sbi->s_ucg[i] = NULL;
478 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
479 sbi->s_ucpi[i] = NULL;
480 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
481 }
482 for (i = 0; i < uspi->s_ncg; i++) {
483 UFSD("read cg %u\n", i);
484 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
485 goto failed;
486 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
487 goto failed;
488
489 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
490 }
491 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
492 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
493 goto failed;
494 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
495 }
496 sbi->s_cg_loaded = 0;
497 UFSD("EXIT\n");
498 return 1;
499
500 failed:
501 kfree (base);
502 if (sbi->s_ucg) {
503 for (i = 0; i < uspi->s_ncg; i++)
504 if (sbi->s_ucg[i])
505 brelse (sbi->s_ucg[i]);
506 kfree (sbi->s_ucg);
507 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
508 kfree (sbi->s_ucpi[i]);
509 }
510 UFSD("EXIT (FAILED)\n");
511 return 0;
512 }
513
514 /*
515 * Sync our internal copy of fs_cstotal with disk
516 */
517 static void ufs_put_cstotal(struct super_block *sb)
518 {
519 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
520 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
521 struct ufs_super_block_first *usb1;
522 struct ufs_super_block_second *usb2;
523 struct ufs_super_block_third *usb3;
524
525 UFSD("ENTER\n");
526 usb1 = ubh_get_usb_first(uspi);
527 usb2 = ubh_get_usb_second(uspi);
528 usb3 = ubh_get_usb_third(uspi);
529
530 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
531 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
532 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
533 /*we have statistic in different place, then usual*/
534 usb2->fs_un.fs_u2.cs_ndir =
535 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
536 usb2->fs_un.fs_u2.cs_nbfree =
537 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
538 usb3->fs_un1.fs_u2.cs_nifree =
539 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
540 usb3->fs_un1.fs_u2.cs_nffree =
541 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
542 } else {
543 usb1->fs_cstotal.cs_ndir =
544 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
545 usb1->fs_cstotal.cs_nbfree =
546 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
547 usb1->fs_cstotal.cs_nifree =
548 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
549 usb1->fs_cstotal.cs_nffree =
550 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
551 }
552 ubh_mark_buffer_dirty(USPI_UBH(uspi));
553 ufs_print_super_stuff(sb, usb1, usb2, usb3);
554 UFSD("EXIT\n");
555 }
556
557 /**
558 * ufs_put_super_internal() - put on-disk intrenal structures
559 * @sb: pointer to super_block structure
560 * Put on-disk structures associated with cylinder groups
561 * and write them back to disk, also update cs_total on disk
562 */
563 static void ufs_put_super_internal(struct super_block *sb)
564 {
565 struct ufs_sb_info *sbi = UFS_SB(sb);
566 struct ufs_sb_private_info *uspi = sbi->s_uspi;
567 struct ufs_buffer_head * ubh;
568 unsigned char * base, * space;
569 unsigned blks, size, i;
570
571
572 UFSD("ENTER\n");
573 ufs_put_cstotal(sb);
574 size = uspi->s_cssize;
575 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
576 base = space = (char*) sbi->s_csp;
577 for (i = 0; i < blks; i += uspi->s_fpb) {
578 size = uspi->s_bsize;
579 if (i + uspi->s_fpb > blks)
580 size = (blks - i) * uspi->s_fsize;
581
582 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
583
584 ubh_memcpyubh (ubh, space, size);
585 space += size;
586 ubh_mark_buffer_uptodate (ubh, 1);
587 ubh_mark_buffer_dirty (ubh);
588 ubh_brelse (ubh);
589 }
590 for (i = 0; i < sbi->s_cg_loaded; i++) {
591 ufs_put_cylinder (sb, i);
592 kfree (sbi->s_ucpi[i]);
593 }
594 for (; i < UFS_MAX_GROUP_LOADED; i++)
595 kfree (sbi->s_ucpi[i]);
596 for (i = 0; i < uspi->s_ncg; i++)
597 brelse (sbi->s_ucg[i]);
598 kfree (sbi->s_ucg);
599 kfree (base);
600 UFSD("EXIT\n");
601 }
602
603 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
604 {
605 struct ufs_sb_info * sbi;
606 struct ufs_sb_private_info * uspi;
607 struct ufs_super_block_first * usb1;
608 struct ufs_super_block_second * usb2;
609 struct ufs_super_block_third * usb3;
610 struct ufs_buffer_head * ubh;
611 struct inode *inode;
612 unsigned block_size, super_block_size;
613 unsigned flags;
614 unsigned super_block_offset;
615
616 uspi = NULL;
617 ubh = NULL;
618 flags = 0;
619
620 UFSD("ENTER\n");
621
622 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
623 if (!sbi)
624 goto failed_nomem;
625 sb->s_fs_info = sbi;
626
627 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
628
629 #ifndef CONFIG_UFS_FS_WRITE
630 if (!(sb->s_flags & MS_RDONLY)) {
631 printk("ufs was compiled with read-only support, "
632 "can't be mounted as read-write\n");
633 goto failed;
634 }
635 #endif
636 /*
637 * Set default mount options
638 * Parse mount options
639 */
640 sbi->s_mount_opt = 0;
641 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
642 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
643 printk("wrong mount options\n");
644 goto failed;
645 }
646 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
647 if (!silent)
648 printk("You didn't specify the type of your ufs filesystem\n\n"
649 "mount -t ufs -o ufstype="
650 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
651 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
652 "default is ufstype=old\n");
653 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
654 }
655
656 sbi->s_uspi = uspi =
657 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
658 if (!uspi)
659 goto failed;
660 uspi->s_dirblksize = UFS_SECTOR_SIZE;
661 super_block_offset=UFS_SBLOCK;
662
663 /* Keep 2Gig file limit. Some UFS variants need to override
664 this but as I don't know which I'll let those in the know loosen
665 the rules */
666 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
667 case UFS_MOUNT_UFSTYPE_44BSD:
668 UFSD("ufstype=44bsd\n");
669 uspi->s_fsize = block_size = 512;
670 uspi->s_fmask = ~(512 - 1);
671 uspi->s_fshift = 9;
672 uspi->s_sbsize = super_block_size = 1536;
673 uspi->s_sbbase = 0;
674 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
675 break;
676 case UFS_MOUNT_UFSTYPE_UFS2:
677 UFSD("ufstype=ufs2\n");
678 super_block_offset=SBLOCK_UFS2;
679 uspi->s_fsize = block_size = 512;
680 uspi->s_fmask = ~(512 - 1);
681 uspi->s_fshift = 9;
682 uspi->s_sbsize = super_block_size = 1536;
683 uspi->s_sbbase = 0;
684 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
685 break;
686
687 case UFS_MOUNT_UFSTYPE_SUN:
688 UFSD("ufstype=sun\n");
689 uspi->s_fsize = block_size = 1024;
690 uspi->s_fmask = ~(1024 - 1);
691 uspi->s_fshift = 10;
692 uspi->s_sbsize = super_block_size = 2048;
693 uspi->s_sbbase = 0;
694 uspi->s_maxsymlinklen = 56;
695 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
696 break;
697
698 case UFS_MOUNT_UFSTYPE_SUNx86:
699 UFSD("ufstype=sunx86\n");
700 uspi->s_fsize = block_size = 1024;
701 uspi->s_fmask = ~(1024 - 1);
702 uspi->s_fshift = 10;
703 uspi->s_sbsize = super_block_size = 2048;
704 uspi->s_sbbase = 0;
705 uspi->s_maxsymlinklen = 56;
706 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
707 break;
708
709 case UFS_MOUNT_UFSTYPE_OLD:
710 UFSD("ufstype=old\n");
711 uspi->s_fsize = block_size = 1024;
712 uspi->s_fmask = ~(1024 - 1);
713 uspi->s_fshift = 10;
714 uspi->s_sbsize = super_block_size = 2048;
715 uspi->s_sbbase = 0;
716 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
717 if (!(sb->s_flags & MS_RDONLY)) {
718 if (!silent)
719 printk(KERN_INFO "ufstype=old is supported read-only\n");
720 sb->s_flags |= MS_RDONLY;
721 }
722 break;
723
724 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
725 /*TODO: check may be we need set special dir block size?*/
726 UFSD("ufstype=nextstep\n");
727 uspi->s_fsize = block_size = 1024;
728 uspi->s_fmask = ~(1024 - 1);
729 uspi->s_fshift = 10;
730 uspi->s_sbsize = super_block_size = 2048;
731 uspi->s_sbbase = 0;
732 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
733 if (!(sb->s_flags & MS_RDONLY)) {
734 if (!silent)
735 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
736 sb->s_flags |= MS_RDONLY;
737 }
738 break;
739
740 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
741 /*TODO: check may be we need set special dir block size?*/
742 UFSD("ufstype=nextstep-cd\n");
743 uspi->s_fsize = block_size = 2048;
744 uspi->s_fmask = ~(2048 - 1);
745 uspi->s_fshift = 11;
746 uspi->s_sbsize = super_block_size = 2048;
747 uspi->s_sbbase = 0;
748 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
749 if (!(sb->s_flags & MS_RDONLY)) {
750 if (!silent)
751 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
752 sb->s_flags |= MS_RDONLY;
753 }
754 break;
755
756 case UFS_MOUNT_UFSTYPE_OPENSTEP:
757 UFSD("ufstype=openstep\n");
758 uspi->s_fsize = block_size = 1024;
759 uspi->s_fmask = ~(1024 - 1);
760 uspi->s_fshift = 10;
761 uspi->s_sbsize = super_block_size = 2048;
762 uspi->s_sbbase = 0;
763 uspi->s_dirblksize = 1024;
764 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
765 if (!(sb->s_flags & MS_RDONLY)) {
766 if (!silent)
767 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
768 sb->s_flags |= MS_RDONLY;
769 }
770 break;
771
772 case UFS_MOUNT_UFSTYPE_HP:
773 UFSD("ufstype=hp\n");
774 uspi->s_fsize = block_size = 1024;
775 uspi->s_fmask = ~(1024 - 1);
776 uspi->s_fshift = 10;
777 uspi->s_sbsize = super_block_size = 2048;
778 uspi->s_sbbase = 0;
779 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
780 if (!(sb->s_flags & MS_RDONLY)) {
781 if (!silent)
782 printk(KERN_INFO "ufstype=hp is supported read-only\n");
783 sb->s_flags |= MS_RDONLY;
784 }
785 break;
786 default:
787 if (!silent)
788 printk("unknown ufstype\n");
789 goto failed;
790 }
791
792 again:
793 if (!sb_set_blocksize(sb, block_size)) {
794 printk(KERN_ERR "UFS: failed to set blocksize\n");
795 goto failed;
796 }
797
798 /*
799 * read ufs super block from device
800 */
801
802 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
803
804 if (!ubh)
805 goto failed;
806
807
808 usb1 = ubh_get_usb_first(uspi);
809 usb2 = ubh_get_usb_second(uspi);
810 usb3 = ubh_get_usb_third(uspi);
811
812 /*
813 * Check ufs magic number
814 */
815 sbi->s_bytesex = BYTESEX_LE;
816 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
817 case UFS_MAGIC:
818 case UFS2_MAGIC:
819 case UFS_MAGIC_LFN:
820 case UFS_MAGIC_FEA:
821 case UFS_MAGIC_4GB:
822 goto magic_found;
823 }
824 sbi->s_bytesex = BYTESEX_BE;
825 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
826 case UFS_MAGIC:
827 case UFS2_MAGIC:
828 case UFS_MAGIC_LFN:
829 case UFS_MAGIC_FEA:
830 case UFS_MAGIC_4GB:
831 goto magic_found;
832 }
833
834 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
835 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
836 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
837 && uspi->s_sbbase < 256) {
838 ubh_brelse_uspi(uspi);
839 ubh = NULL;
840 uspi->s_sbbase += 8;
841 goto again;
842 }
843 if (!silent)
844 printk("ufs_read_super: bad magic number\n");
845 goto failed;
846
847 magic_found:
848 /*
849 * Check block and fragment sizes
850 */
851 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
852 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
853 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
854 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
855 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
856
857 if (uspi->s_fsize & (uspi->s_fsize - 1)) {
858 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
859 uspi->s_fsize);
860 goto failed;
861 }
862 if (uspi->s_fsize < 512) {
863 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
864 uspi->s_fsize);
865 goto failed;
866 }
867 if (uspi->s_fsize > 4096) {
868 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
869 uspi->s_fsize);
870 goto failed;
871 }
872 if (uspi->s_bsize & (uspi->s_bsize - 1)) {
873 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
874 uspi->s_bsize);
875 goto failed;
876 }
877 if (uspi->s_bsize < 4096) {
878 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
879 uspi->s_bsize);
880 goto failed;
881 }
882 if (uspi->s_bsize / uspi->s_fsize > 8) {
883 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
884 uspi->s_bsize / uspi->s_fsize);
885 goto failed;
886 }
887 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
888 ubh_brelse_uspi(uspi);
889 ubh = NULL;
890 block_size = uspi->s_fsize;
891 super_block_size = uspi->s_sbsize;
892 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
893 goto again;
894 }
895
896
897 ufs_print_super_stuff(sb, usb1, usb2, usb3);
898
899 /*
900 * Check, if file system was correctly unmounted.
901 * If not, make it read only.
902 */
903 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
904 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
905 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
906 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
907 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
908 switch(usb1->fs_clean) {
909 case UFS_FSCLEAN:
910 UFSD("fs is clean\n");
911 break;
912 case UFS_FSSTABLE:
913 UFSD("fs is stable\n");
914 break;
915 case UFS_FSOSF1:
916 UFSD("fs is DEC OSF/1\n");
917 break;
918 case UFS_FSACTIVE:
919 printk("ufs_read_super: fs is active\n");
920 sb->s_flags |= MS_RDONLY;
921 break;
922 case UFS_FSBAD:
923 printk("ufs_read_super: fs is bad\n");
924 sb->s_flags |= MS_RDONLY;
925 break;
926 default:
927 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
928 sb->s_flags |= MS_RDONLY;
929 break;
930 }
931 } else {
932 printk("ufs_read_super: fs needs fsck\n");
933 sb->s_flags |= MS_RDONLY;
934 }
935
936 /*
937 * Read ufs_super_block into internal data structures
938 */
939 sb->s_op = &ufs_super_ops;
940 sb->dq_op = NULL; /***/
941 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
942
943 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
944 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
945 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
946 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
947 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
948 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
949
950 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
951 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
952 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
953 } else {
954 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
955 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
956 }
957
958 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
959 /* s_bsize already set */
960 /* s_fsize already set */
961 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
962 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
963 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
964 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
965 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
966 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
967 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
968 uspi->s_fshift);
969 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
970 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
971 /* s_sbsize already set */
972 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
973 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
974 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
975 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
976 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
977 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
978 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
979 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
980
981 if (uspi->fs_magic == UFS2_MAGIC)
982 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
983 else
984 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
985
986 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
987 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
988 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
989 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
990 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
991 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
992 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
993 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
994 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
995 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
996 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
997 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
998 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
999 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1000 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1001
1002 /*
1003 * Compute another frequently used values
1004 */
1005 uspi->s_fpbmask = uspi->s_fpb - 1;
1006 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1007 uspi->s_apbshift = uspi->s_bshift - 3;
1008 else
1009 uspi->s_apbshift = uspi->s_bshift - 2;
1010
1011 uspi->s_2apbshift = uspi->s_apbshift * 2;
1012 uspi->s_3apbshift = uspi->s_apbshift * 3;
1013 uspi->s_apb = 1 << uspi->s_apbshift;
1014 uspi->s_2apb = 1 << uspi->s_2apbshift;
1015 uspi->s_3apb = 1 << uspi->s_3apbshift;
1016 uspi->s_apbmask = uspi->s_apb - 1;
1017 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1018 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1019 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1020 uspi->s_bpf = uspi->s_fsize << 3;
1021 uspi->s_bpfshift = uspi->s_fshift + 3;
1022 uspi->s_bpfmask = uspi->s_bpf - 1;
1023 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1024 UFS_MOUNT_UFSTYPE_44BSD)
1025 uspi->s_maxsymlinklen =
1026 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1027
1028 sbi->s_flags = flags;
1029
1030 inode = iget(sb, UFS_ROOTINO);
1031 if (!inode || is_bad_inode(inode))
1032 goto failed;
1033 sb->s_root = d_alloc_root(inode);
1034 if (!sb->s_root)
1035 goto dalloc_failed;
1036
1037 ufs_setup_cstotal(sb);
1038 /*
1039 * Read cylinder group structures
1040 */
1041 if (!(sb->s_flags & MS_RDONLY))
1042 if (!ufs_read_cylinder_structures(sb))
1043 goto failed;
1044
1045 UFSD("EXIT\n");
1046 return 0;
1047
1048 dalloc_failed:
1049 iput(inode);
1050 failed:
1051 if (ubh)
1052 ubh_brelse_uspi (uspi);
1053 kfree (uspi);
1054 kfree(sbi);
1055 sb->s_fs_info = NULL;
1056 UFSD("EXIT (FAILED)\n");
1057 return -EINVAL;
1058
1059 failed_nomem:
1060 UFSD("EXIT (NOMEM)\n");
1061 return -ENOMEM;
1062 }
1063
1064 static void ufs_write_super(struct super_block *sb)
1065 {
1066 struct ufs_sb_private_info * uspi;
1067 struct ufs_super_block_first * usb1;
1068 struct ufs_super_block_third * usb3;
1069 unsigned flags;
1070
1071 lock_kernel();
1072 UFSD("ENTER\n");
1073 flags = UFS_SB(sb)->s_flags;
1074 uspi = UFS_SB(sb)->s_uspi;
1075 usb1 = ubh_get_usb_first(uspi);
1076 usb3 = ubh_get_usb_third(uspi);
1077
1078 if (!(sb->s_flags & MS_RDONLY)) {
1079 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1080 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1081 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1082 ufs_set_fs_state(sb, usb1, usb3,
1083 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1084 ufs_put_cstotal(sb);
1085 }
1086 sb->s_dirt = 0;
1087 UFSD("EXIT\n");
1088 unlock_kernel();
1089 }
1090
1091 static void ufs_put_super(struct super_block *sb)
1092 {
1093 struct ufs_sb_info * sbi = UFS_SB(sb);
1094
1095 UFSD("ENTER\n");
1096
1097 if (!(sb->s_flags & MS_RDONLY))
1098 ufs_put_super_internal(sb);
1099
1100 ubh_brelse_uspi (sbi->s_uspi);
1101 kfree (sbi->s_uspi);
1102 kfree (sbi);
1103 sb->s_fs_info = NULL;
1104 UFSD("EXIT\n");
1105 return;
1106 }
1107
1108
1109 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1110 {
1111 struct ufs_sb_private_info * uspi;
1112 struct ufs_super_block_first * usb1;
1113 struct ufs_super_block_third * usb3;
1114 unsigned new_mount_opt, ufstype;
1115 unsigned flags;
1116
1117 uspi = UFS_SB(sb)->s_uspi;
1118 flags = UFS_SB(sb)->s_flags;
1119 usb1 = ubh_get_usb_first(uspi);
1120 usb3 = ubh_get_usb_third(uspi);
1121
1122 /*
1123 * Allow the "check" option to be passed as a remount option.
1124 * It is not possible to change ufstype option during remount
1125 */
1126 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1127 new_mount_opt = 0;
1128 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1129 if (!ufs_parse_options (data, &new_mount_opt))
1130 return -EINVAL;
1131 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1132 new_mount_opt |= ufstype;
1133 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1134 printk("ufstype can't be changed during remount\n");
1135 return -EINVAL;
1136 }
1137
1138 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1139 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1140 return 0;
1141 }
1142
1143 /*
1144 * fs was mouted as rw, remounting ro
1145 */
1146 if (*mount_flags & MS_RDONLY) {
1147 ufs_put_super_internal(sb);
1148 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1149 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1150 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1151 ufs_set_fs_state(sb, usb1, usb3,
1152 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1153 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1154 sb->s_dirt = 0;
1155 sb->s_flags |= MS_RDONLY;
1156 } else {
1157 /*
1158 * fs was mounted as ro, remounting rw
1159 */
1160 #ifndef CONFIG_UFS_FS_WRITE
1161 printk("ufs was compiled with read-only support, "
1162 "can't be mounted as read-write\n");
1163 return -EINVAL;
1164 #else
1165 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1166 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1167 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1168 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1169 printk("this ufstype is read-only supported\n");
1170 return -EINVAL;
1171 }
1172 if (!ufs_read_cylinder_structures(sb)) {
1173 printk("failed during remounting\n");
1174 return -EPERM;
1175 }
1176 sb->s_flags &= ~MS_RDONLY;
1177 #endif
1178 }
1179 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1180 return 0;
1181 }
1182
1183 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1184 {
1185 struct super_block *sb = dentry->d_sb;
1186 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1187 unsigned flags = UFS_SB(sb)->s_flags;
1188 struct ufs_super_block_first *usb1;
1189 struct ufs_super_block_second *usb2;
1190 struct ufs_super_block_third *usb3;
1191
1192 lock_kernel();
1193
1194 usb1 = ubh_get_usb_first(uspi);
1195 usb2 = ubh_get_usb_second(uspi);
1196 usb3 = ubh_get_usb_third(uspi);
1197
1198 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1199 buf->f_type = UFS2_MAGIC;
1200 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1201 } else {
1202 buf->f_type = UFS_MAGIC;
1203 buf->f_blocks = uspi->s_dsize;
1204 }
1205 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1206 uspi->cs_total.cs_nffree;
1207 buf->f_ffree = uspi->cs_total.cs_nifree;
1208 buf->f_bsize = sb->s_blocksize;
1209 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1210 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1211 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1212 buf->f_namelen = UFS_MAXNAMLEN;
1213
1214 unlock_kernel();
1215
1216 return 0;
1217 }
1218
1219 static struct kmem_cache * ufs_inode_cachep;
1220
1221 static struct inode *ufs_alloc_inode(struct super_block *sb)
1222 {
1223 struct ufs_inode_info *ei;
1224 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1225 if (!ei)
1226 return NULL;
1227 ei->vfs_inode.i_version = 1;
1228 return &ei->vfs_inode;
1229 }
1230
1231 static void ufs_destroy_inode(struct inode *inode)
1232 {
1233 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1234 }
1235
1236 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
1237 {
1238 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1239
1240 inode_init_once(&ei->vfs_inode);
1241 }
1242
1243 static int init_inodecache(void)
1244 {
1245 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1246 sizeof(struct ufs_inode_info),
1247 0, (SLAB_RECLAIM_ACCOUNT|
1248 SLAB_MEM_SPREAD),
1249 init_once, NULL);
1250 if (ufs_inode_cachep == NULL)
1251 return -ENOMEM;
1252 return 0;
1253 }
1254
1255 static void destroy_inodecache(void)
1256 {
1257 kmem_cache_destroy(ufs_inode_cachep);
1258 }
1259
1260 #ifdef CONFIG_QUOTA
1261 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1262 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1263 #endif
1264
1265 static const struct super_operations ufs_super_ops = {
1266 .alloc_inode = ufs_alloc_inode,
1267 .destroy_inode = ufs_destroy_inode,
1268 .read_inode = ufs_read_inode,
1269 .write_inode = ufs_write_inode,
1270 .delete_inode = ufs_delete_inode,
1271 .put_super = ufs_put_super,
1272 .write_super = ufs_write_super,
1273 .statfs = ufs_statfs,
1274 .remount_fs = ufs_remount,
1275 #ifdef CONFIG_QUOTA
1276 .quota_read = ufs_quota_read,
1277 .quota_write = ufs_quota_write,
1278 #endif
1279 };
1280
1281 #ifdef CONFIG_QUOTA
1282
1283 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1284 * acquiring the locks... As quota files are never truncated and quota code
1285 * itself serializes the operations (and noone else should touch the files)
1286 * we don't have to be afraid of races */
1287 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1288 size_t len, loff_t off)
1289 {
1290 struct inode *inode = sb_dqopt(sb)->files[type];
1291 sector_t blk = off >> sb->s_blocksize_bits;
1292 int err = 0;
1293 int offset = off & (sb->s_blocksize - 1);
1294 int tocopy;
1295 size_t toread;
1296 struct buffer_head *bh;
1297 loff_t i_size = i_size_read(inode);
1298
1299 if (off > i_size)
1300 return 0;
1301 if (off+len > i_size)
1302 len = i_size-off;
1303 toread = len;
1304 while (toread > 0) {
1305 tocopy = sb->s_blocksize - offset < toread ?
1306 sb->s_blocksize - offset : toread;
1307
1308 bh = ufs_bread(inode, blk, 0, &err);
1309 if (err)
1310 return err;
1311 if (!bh) /* A hole? */
1312 memset(data, 0, tocopy);
1313 else {
1314 memcpy(data, bh->b_data+offset, tocopy);
1315 brelse(bh);
1316 }
1317 offset = 0;
1318 toread -= tocopy;
1319 data += tocopy;
1320 blk++;
1321 }
1322 return len;
1323 }
1324
1325 /* Write to quotafile */
1326 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1327 const char *data, size_t len, loff_t off)
1328 {
1329 struct inode *inode = sb_dqopt(sb)->files[type];
1330 sector_t blk = off >> sb->s_blocksize_bits;
1331 int err = 0;
1332 int offset = off & (sb->s_blocksize - 1);
1333 int tocopy;
1334 size_t towrite = len;
1335 struct buffer_head *bh;
1336
1337 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1338 while (towrite > 0) {
1339 tocopy = sb->s_blocksize - offset < towrite ?
1340 sb->s_blocksize - offset : towrite;
1341
1342 bh = ufs_bread(inode, blk, 1, &err);
1343 if (!bh)
1344 goto out;
1345 lock_buffer(bh);
1346 memcpy(bh->b_data+offset, data, tocopy);
1347 flush_dcache_page(bh->b_page);
1348 set_buffer_uptodate(bh);
1349 mark_buffer_dirty(bh);
1350 unlock_buffer(bh);
1351 brelse(bh);
1352 offset = 0;
1353 towrite -= tocopy;
1354 data += tocopy;
1355 blk++;
1356 }
1357 out:
1358 if (len == towrite) {
1359 mutex_unlock(&inode->i_mutex);
1360 return err;
1361 }
1362 if (inode->i_size < off+len-towrite)
1363 i_size_write(inode, off+len-towrite);
1364 inode->i_version++;
1365 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1366 mark_inode_dirty(inode);
1367 mutex_unlock(&inode->i_mutex);
1368 return len - towrite;
1369 }
1370
1371 #endif
1372
1373 static int ufs_get_sb(struct file_system_type *fs_type,
1374 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1375 {
1376 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1377 }
1378
1379 static struct file_system_type ufs_fs_type = {
1380 .owner = THIS_MODULE,
1381 .name = "ufs",
1382 .get_sb = ufs_get_sb,
1383 .kill_sb = kill_block_super,
1384 .fs_flags = FS_REQUIRES_DEV,
1385 };
1386
1387 static int __init init_ufs_fs(void)
1388 {
1389 int err = init_inodecache();
1390 if (err)
1391 goto out1;
1392 err = register_filesystem(&ufs_fs_type);
1393 if (err)
1394 goto out;
1395 return 0;
1396 out:
1397 destroy_inodecache();
1398 out1:
1399 return err;
1400 }
1401
1402 static void __exit exit_ufs_fs(void)
1403 {
1404 unregister_filesystem(&ufs_fs_type);
1405 destroy_inodecache();
1406 }
1407
1408 module_init(init_ufs_fs)
1409 module_exit(exit_ufs_fs)
1410 MODULE_LICENSE("GPL");
linux v2.6.22.y-op