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super.c
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1 /*
2  * linux/fs/ufs/super.c
3  *
4  * Copyright (C) 1998
5  * Daniel Pirkl <[email protected]>
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 ([email protected])
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 ([email protected]), 1995
26  */
27 
28 /*
29  * Inspired by
30  *
31  * linux/fs/ufs/super.c
32  *
33  * Copyright (C) 1996
34  * Adrian Rodriguez ([email protected])
35  * Laboratory for Computer Science Research Computing Facility
36  * Rutgers, The State University of New Jersey
37  *
38  * Copyright (C) 1996 Eddie C. Dost ([email protected])
39  *
40  * Kernel module support added on 96/04/26 by
41  * Stefan Reinauer <[email protected]>
42  *
43  * Module usage counts added on 96/04/29 by
44  * Gertjan van Wingerde <[email protected]>
45  *
46  * Clean swab support on 19970406 by
47  * Francois-Rene Rideau <[email protected]>
48  *
49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
50  * Niels Kristian Bech Jensen <[email protected]> partially based
51  * on code by Martin von Loewis <[email protected]>.
52  *
53  * NeXTstep support added on February 5th 1998 by
54  * Niels Kristian Bech Jensen <[email protected]>.
55  *
56  * write support Daniel Pirkl <[email protected]> 1998
57  *
58  * HP/UX hfs filesystem support added by
59  * Martin K. Petersen <[email protected]>, August 1999
60  *
61  * UFS2 (of FreeBSD 5.x) support added by
62  * Niraj Kumar <[email protected]>, Jan 2004
63  *
64  * UFS2 write support added by
65  * Evgeniy Dushistov <[email protected]>, 2007
66  */
67 
68 
69 #include <linux/exportfs.h>
70 #include <linux/module.h>
71 #include <linux/bitops.h>
72 
73 #include <stdarg.h>
74 
75 #include <asm/uaccess.h>
76 
77 #include <linux/errno.h>
78 #include <linux/fs.h>
79 #include <linux/slab.h>
80 #include <linux/time.h>
81 #include <linux/stat.h>
82 #include <linux/string.h>
83 #include <linux/blkdev.h>
84 #include <linux/init.h>
85 #include <linux/parser.h>
86 #include <linux/buffer_head.h>
87 #include <linux/vfs.h>
88 #include <linux/log2.h>
89 #include <linux/mount.h>
90 #include <linux/seq_file.h>
91 
92 #include "ufs_fs.h"
93 #include "ufs.h"
94 #include "swab.h"
95 #include "util.h"
96 
97 void lock_ufs(struct super_block *sb)
98 {
99 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
100  struct ufs_sb_info *sbi = UFS_SB(sb);
101 
102  mutex_lock(&sbi->mutex);
103  sbi->mutex_owner = current;
104 #endif
105 }
106 
107 void unlock_ufs(struct super_block *sb)
108 {
109 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
110  struct ufs_sb_info *sbi = UFS_SB(sb);
111 
112  sbi->mutex_owner = NULL;
113  mutex_unlock(&sbi->mutex);
114 #endif
115 }
116 
117 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
118 {
119  struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
120  struct inode *inode;
121 
122  if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
123  return ERR_PTR(-ESTALE);
124 
125  inode = ufs_iget(sb, ino);
126  if (IS_ERR(inode))
127  return ERR_CAST(inode);
128  if (generation && inode->i_generation != generation) {
129  iput(inode);
130  return ERR_PTR(-ESTALE);
131  }
132  return inode;
133 }
134 
135 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
136  int fh_len, int fh_type)
137 {
138  return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
139 }
140 
141 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
142  int fh_len, int fh_type)
143 {
144  return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
145 }
146 
147 static struct dentry *ufs_get_parent(struct dentry *child)
148 {
149  struct qstr dot_dot = QSTR_INIT("..", 2);
150  ino_t ino;
151 
152  ino = ufs_inode_by_name(child->d_inode, &dot_dot);
153  if (!ino)
154  return ERR_PTR(-ENOENT);
155  return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
156 }
157 
158 static const struct export_operations ufs_export_ops = {
159  .fh_to_dentry = ufs_fh_to_dentry,
160  .fh_to_parent = ufs_fh_to_parent,
161  .get_parent = ufs_get_parent,
162 };
163 
164 #ifdef CONFIG_UFS_DEBUG
165 /*
166  * Print contents of ufs_super_block, useful for debugging
167  */
168 static void ufs_print_super_stuff(struct super_block *sb,
169  struct ufs_super_block_first *usb1,
170  struct ufs_super_block_second *usb2,
171  struct ufs_super_block_third *usb3)
172 {
173  u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
174 
175  printk("ufs_print_super_stuff\n");
176  printk(" magic: 0x%x\n", magic);
177  if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
178  printk(" fs_size: %llu\n", (unsigned long long)
179  fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
180  printk(" fs_dsize: %llu\n", (unsigned long long)
181  fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
182  printk(" bsize: %u\n",
183  fs32_to_cpu(sb, usb1->fs_bsize));
184  printk(" fsize: %u\n",
185  fs32_to_cpu(sb, usb1->fs_fsize));
186  printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
187  printk(" fs_sblockloc: %llu\n", (unsigned long long)
188  fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
189  printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
190  fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
191  printk(" cs_nbfree(No of free blocks): %llu\n",
192  (unsigned long long)
193  fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
194  printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
195  (unsigned long long)
196  fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
197  printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
198  (unsigned long long)
199  fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
200  printk(KERN_INFO" fs_maxsymlinklen: %u\n",
201  fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
202  } else {
203  printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
204  printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
205  printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
206  printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
207  printk(" cgoffset: %u\n",
208  fs32_to_cpu(sb, usb1->fs_cgoffset));
209  printk(" ~cgmask: 0x%x\n",
210  ~fs32_to_cpu(sb, usb1->fs_cgmask));
211  printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
212  printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
213  printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
214  printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
215  printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
216  printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
217  printk(" fragshift: %u\n",
218  fs32_to_cpu(sb, usb1->fs_fragshift));
219  printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
220  printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
221  printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
222  printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
223  printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
224  printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
225  printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
226  printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
227  printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
228  printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
229  printk(" fstodb: %u\n",
230  fs32_to_cpu(sb, usb1->fs_fsbtodb));
231  printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
232  printk(" ndir %u\n",
233  fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
234  printk(" nifree %u\n",
235  fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
236  printk(" nbfree %u\n",
237  fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
238  printk(" nffree %u\n",
239  fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
240  }
241  printk("\n");
242 }
243 
244 /*
245  * Print contents of ufs_cylinder_group, useful for debugging
246  */
247 static void ufs_print_cylinder_stuff(struct super_block *sb,
248  struct ufs_cylinder_group *cg)
249 {
250  printk("\nufs_print_cylinder_stuff\n");
251  printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
252  printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
253  printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
254  printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
255  printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
256  printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
257  printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
258  printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
259  printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
260  printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
261  printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
262  printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
263  printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
264  printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
265  printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
266  fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
267  fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
268  fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
269  fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
270  printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
271  printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
272  printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
273  printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
274  printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
275  printk(" clustersumoff %u\n",
276  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
277  printk(" clusteroff %u\n",
278  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
279  printk(" nclusterblks %u\n",
280  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
281  printk("\n");
282 }
283 #else
284 # define ufs_print_super_stuff(sb, usb1, usb2, usb3)
285 # define ufs_print_cylinder_stuff(sb, cg)
286 #endif /* CONFIG_UFS_DEBUG */
287 
288 static const struct super_operations ufs_super_ops;
289 
290 static char error_buf[1024];
291 
292 void ufs_error (struct super_block * sb, const char * function,
293  const char * fmt, ...)
294 {
295  struct ufs_sb_private_info * uspi;
296  struct ufs_super_block_first * usb1;
297  va_list args;
298 
299  uspi = UFS_SB(sb)->s_uspi;
300  usb1 = ubh_get_usb_first(uspi);
301 
302  if (!(sb->s_flags & MS_RDONLY)) {
303  usb1->fs_clean = UFS_FSBAD;
304  ubh_mark_buffer_dirty(USPI_UBH(uspi));
305  ufs_mark_sb_dirty(sb);
306  sb->s_flags |= MS_RDONLY;
307  }
308  va_start (args, fmt);
309  vsnprintf (error_buf, sizeof(error_buf), fmt, args);
310  va_end (args);
311  switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
312  case UFS_MOUNT_ONERROR_PANIC:
313  panic ("UFS-fs panic (device %s): %s: %s\n",
314  sb->s_id, function, error_buf);
315 
316  case UFS_MOUNT_ONERROR_LOCK:
317  case UFS_MOUNT_ONERROR_UMOUNT:
318  case UFS_MOUNT_ONERROR_REPAIR:
319  printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
320  sb->s_id, function, error_buf);
321  }
322 }
323 
324 void ufs_panic (struct super_block * sb, const char * function,
325  const char * fmt, ...)
326 {
327  struct ufs_sb_private_info * uspi;
328  struct ufs_super_block_first * usb1;
329  va_list args;
330 
331  uspi = UFS_SB(sb)->s_uspi;
332  usb1 = ubh_get_usb_first(uspi);
333 
334  if (!(sb->s_flags & MS_RDONLY)) {
335  usb1->fs_clean = UFS_FSBAD;
336  ubh_mark_buffer_dirty(USPI_UBH(uspi));
337  ufs_mark_sb_dirty(sb);
338  }
339  va_start (args, fmt);
340  vsnprintf (error_buf, sizeof(error_buf), fmt, args);
341  va_end (args);
342  sb->s_flags |= MS_RDONLY;
343  printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
344  sb->s_id, function, error_buf);
345 }
346 
347 void ufs_warning (struct super_block * sb, const char * function,
348  const char * fmt, ...)
349 {
350  va_list args;
351 
352  va_start (args, fmt);
353  vsnprintf (error_buf, sizeof(error_buf), fmt, args);
354  va_end (args);
355  printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
356  sb->s_id, function, error_buf);
357 }
358 
359 enum {
360  Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
361  Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
362  Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
363  Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
364  Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
365  Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
366  Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
367  Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
368  Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
369  Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
370  Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
371  Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
372  Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
373  Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
374  Opt_err
375 };
376 
377 static const match_table_t tokens = {
378  {Opt_type_old, "ufstype=old"},
379  {Opt_type_sunx86, "ufstype=sunx86"},
380  {Opt_type_sun, "ufstype=sun"},
381  {Opt_type_sunos, "ufstype=sunos"},
382  {Opt_type_44bsd, "ufstype=44bsd"},
383  {Opt_type_ufs2, "ufstype=ufs2"},
384  {Opt_type_ufs2, "ufstype=5xbsd"},
385  {Opt_type_hp, "ufstype=hp"},
386  {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
387  {Opt_type_nextstep, "ufstype=nextstep"},
388  {Opt_type_openstep, "ufstype=openstep"},
389 /*end of possible ufs types */
390  {Opt_onerror_panic, "onerror=panic"},
391  {Opt_onerror_lock, "onerror=lock"},
392  {Opt_onerror_umount, "onerror=umount"},
393  {Opt_onerror_repair, "onerror=repair"},
394  {Opt_err, NULL}
395 };
396 
397 static int ufs_parse_options (char * options, unsigned * mount_options)
398 {
399  char * p;
400 
401  UFSD("ENTER\n");
402 
403  if (!options)
404  return 1;
405 
406  while ((p = strsep(&options, ",")) != NULL) {
407  substring_t args[MAX_OPT_ARGS];
408  int token;
409  if (!*p)
410  continue;
411 
412  token = match_token(p, tokens, args);
413  switch (token) {
414  case Opt_type_old:
415  ufs_clear_opt (*mount_options, UFSTYPE);
416  ufs_set_opt (*mount_options, UFSTYPE_OLD);
417  break;
418  case Opt_type_sunx86:
419  ufs_clear_opt (*mount_options, UFSTYPE);
420  ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
421  break;
422  case Opt_type_sun:
423  ufs_clear_opt (*mount_options, UFSTYPE);
424  ufs_set_opt (*mount_options, UFSTYPE_SUN);
425  break;
426  case Opt_type_sunos:
427  ufs_clear_opt(*mount_options, UFSTYPE);
428  ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
429  break;
430  case Opt_type_44bsd:
431  ufs_clear_opt (*mount_options, UFSTYPE);
432  ufs_set_opt (*mount_options, UFSTYPE_44BSD);
433  break;
434  case Opt_type_ufs2:
435  ufs_clear_opt(*mount_options, UFSTYPE);
436  ufs_set_opt(*mount_options, UFSTYPE_UFS2);
437  break;
438  case Opt_type_hp:
439  ufs_clear_opt (*mount_options, UFSTYPE);
440  ufs_set_opt (*mount_options, UFSTYPE_HP);
441  break;
442  case Opt_type_nextstepcd:
443  ufs_clear_opt (*mount_options, UFSTYPE);
444  ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
445  break;
446  case Opt_type_nextstep:
447  ufs_clear_opt (*mount_options, UFSTYPE);
448  ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
449  break;
450  case Opt_type_openstep:
451  ufs_clear_opt (*mount_options, UFSTYPE);
452  ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
453  break;
454  case Opt_onerror_panic:
455  ufs_clear_opt (*mount_options, ONERROR);
456  ufs_set_opt (*mount_options, ONERROR_PANIC);
457  break;
458  case Opt_onerror_lock:
459  ufs_clear_opt (*mount_options, ONERROR);
460  ufs_set_opt (*mount_options, ONERROR_LOCK);
461  break;
462  case Opt_onerror_umount:
463  ufs_clear_opt (*mount_options, ONERROR);
464  ufs_set_opt (*mount_options, ONERROR_UMOUNT);
465  break;
466  case Opt_onerror_repair:
467  printk("UFS-fs: Unable to do repair on error, "
468  "will lock lock instead\n");
469  ufs_clear_opt (*mount_options, ONERROR);
470  ufs_set_opt (*mount_options, ONERROR_REPAIR);
471  break;
472  default:
473  printk("UFS-fs: Invalid option: \"%s\" "
474  "or missing value\n", p);
475  return 0;
476  }
477  }
478  return 1;
479 }
480 
481 /*
482  * Different types of UFS hold fs_cstotal in different
483  * places, and use different data structure for it.
484  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
485  */
486 static void ufs_setup_cstotal(struct super_block *sb)
487 {
488  struct ufs_sb_info *sbi = UFS_SB(sb);
489  struct ufs_sb_private_info *uspi = sbi->s_uspi;
490  struct ufs_super_block_first *usb1;
491  struct ufs_super_block_second *usb2;
492  struct ufs_super_block_third *usb3;
493  unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
494 
495  UFSD("ENTER, mtype=%u\n", mtype);
496  usb1 = ubh_get_usb_first(uspi);
497  usb2 = ubh_get_usb_second(uspi);
498  usb3 = ubh_get_usb_third(uspi);
499 
500  if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
501  (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
502  mtype == UFS_MOUNT_UFSTYPE_UFS2) {
503  /*we have statistic in different place, then usual*/
504  uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
505  uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
506  uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
507  uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
508  } else {
509  uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
510  uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
511  uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
512  uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
513  }
514  UFSD("EXIT\n");
515 }
516 
517 /*
518  * Read on-disk structures associated with cylinder groups
519  */
520 static int ufs_read_cylinder_structures(struct super_block *sb)
521 {
522  struct ufs_sb_info *sbi = UFS_SB(sb);
523  struct ufs_sb_private_info *uspi = sbi->s_uspi;
524  struct ufs_buffer_head * ubh;
525  unsigned char * base, * space;
526  unsigned size, blks, i;
527  struct ufs_super_block_third *usb3;
528 
529  UFSD("ENTER\n");
530 
531  usb3 = ubh_get_usb_third(uspi);
532  /*
533  * Read cs structures from (usually) first data block
534  * on the device.
535  */
536  size = uspi->s_cssize;
537  blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
538  base = space = kmalloc(size, GFP_NOFS);
539  if (!base)
540  goto failed;
541  sbi->s_csp = (struct ufs_csum *)space;
542  for (i = 0; i < blks; i += uspi->s_fpb) {
543  size = uspi->s_bsize;
544  if (i + uspi->s_fpb > blks)
545  size = (blks - i) * uspi->s_fsize;
546 
547  ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
548 
549  if (!ubh)
550  goto failed;
551 
552  ubh_ubhcpymem (space, ubh, size);
553 
554  space += size;
555  ubh_brelse (ubh);
556  ubh = NULL;
557  }
558 
559  /*
560  * Read cylinder group (we read only first fragment from block
561  * at this time) and prepare internal data structures for cg caching.
562  */
563  if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
564  goto failed;
565  for (i = 0; i < uspi->s_ncg; i++)
566  sbi->s_ucg[i] = NULL;
567  for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
568  sbi->s_ucpi[i] = NULL;
569  sbi->s_cgno[i] = UFS_CGNO_EMPTY;
570  }
571  for (i = 0; i < uspi->s_ncg; i++) {
572  UFSD("read cg %u\n", i);
573  if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
574  goto failed;
575  if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
576  goto failed;
577 
578  ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
579  }
580  for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
581  if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
582  goto failed;
583  sbi->s_cgno[i] = UFS_CGNO_EMPTY;
584  }
585  sbi->s_cg_loaded = 0;
586  UFSD("EXIT\n");
587  return 1;
588 
589 failed:
590  kfree (base);
591  if (sbi->s_ucg) {
592  for (i = 0; i < uspi->s_ncg; i++)
593  if (sbi->s_ucg[i])
594  brelse (sbi->s_ucg[i]);
595  kfree (sbi->s_ucg);
596  for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
597  kfree (sbi->s_ucpi[i]);
598  }
599  UFSD("EXIT (FAILED)\n");
600  return 0;
601 }
602 
603 /*
604  * Sync our internal copy of fs_cstotal with disk
605  */
606 static void ufs_put_cstotal(struct super_block *sb)
607 {
608  unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
609  struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
610  struct ufs_super_block_first *usb1;
611  struct ufs_super_block_second *usb2;
612  struct ufs_super_block_third *usb3;
613 
614  UFSD("ENTER\n");
615  usb1 = ubh_get_usb_first(uspi);
616  usb2 = ubh_get_usb_second(uspi);
617  usb3 = ubh_get_usb_third(uspi);
618 
619  if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
620  (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
621  mtype == UFS_MOUNT_UFSTYPE_UFS2) {
622  /*we have statistic in different place, then usual*/
623  usb2->fs_un.fs_u2.cs_ndir =
624  cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
625  usb2->fs_un.fs_u2.cs_nbfree =
626  cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
627  usb3->fs_un1.fs_u2.cs_nifree =
628  cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
629  usb3->fs_un1.fs_u2.cs_nffree =
630  cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
631  } else {
632  usb1->fs_cstotal.cs_ndir =
633  cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
634  usb1->fs_cstotal.cs_nbfree =
635  cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
636  usb1->fs_cstotal.cs_nifree =
637  cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
638  usb1->fs_cstotal.cs_nffree =
639  cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
640  }
641  ubh_mark_buffer_dirty(USPI_UBH(uspi));
642  ufs_print_super_stuff(sb, usb1, usb2, usb3);
643  UFSD("EXIT\n");
644 }
645 
652 static void ufs_put_super_internal(struct super_block *sb)
653 {
654  struct ufs_sb_info *sbi = UFS_SB(sb);
655  struct ufs_sb_private_info *uspi = sbi->s_uspi;
656  struct ufs_buffer_head * ubh;
657  unsigned char * base, * space;
658  unsigned blks, size, i;
659 
660 
661  UFSD("ENTER\n");
662 
663  ufs_put_cstotal(sb);
664  size = uspi->s_cssize;
665  blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
666  base = space = (char*) sbi->s_csp;
667  for (i = 0; i < blks; i += uspi->s_fpb) {
668  size = uspi->s_bsize;
669  if (i + uspi->s_fpb > blks)
670  size = (blks - i) * uspi->s_fsize;
671 
672  ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
673 
674  ubh_memcpyubh (ubh, space, size);
675  space += size;
676  ubh_mark_buffer_uptodate (ubh, 1);
677  ubh_mark_buffer_dirty (ubh);
678  ubh_brelse (ubh);
679  }
680  for (i = 0; i < sbi->s_cg_loaded; i++) {
681  ufs_put_cylinder (sb, i);
682  kfree (sbi->s_ucpi[i]);
683  }
684  for (; i < UFS_MAX_GROUP_LOADED; i++)
685  kfree (sbi->s_ucpi[i]);
686  for (i = 0; i < uspi->s_ncg; i++)
687  brelse (sbi->s_ucg[i]);
688  kfree (sbi->s_ucg);
689  kfree (base);
690 
691  UFSD("EXIT\n");
692 }
693 
694 static int ufs_sync_fs(struct super_block *sb, int wait)
695 {
696  struct ufs_sb_private_info * uspi;
697  struct ufs_super_block_first * usb1;
698  struct ufs_super_block_third * usb3;
699  unsigned flags;
700 
701  lock_ufs(sb);
702  mutex_lock(&UFS_SB(sb)->s_lock);
703 
704  UFSD("ENTER\n");
705 
706  flags = UFS_SB(sb)->s_flags;
707  uspi = UFS_SB(sb)->s_uspi;
708  usb1 = ubh_get_usb_first(uspi);
709  usb3 = ubh_get_usb_third(uspi);
710 
711  usb1->fs_time = cpu_to_fs32(sb, get_seconds());
712  if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
713  (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
714  (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
715  ufs_set_fs_state(sb, usb1, usb3,
716  UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
717  ufs_put_cstotal(sb);
718 
719  UFSD("EXIT\n");
720  mutex_unlock(&UFS_SB(sb)->s_lock);
721  unlock_ufs(sb);
722 
723  return 0;
724 }
725 
726 static void delayed_sync_fs(struct work_struct *work)
727 {
728  struct ufs_sb_info *sbi;
729 
730  sbi = container_of(work, struct ufs_sb_info, sync_work.work);
731 
732  spin_lock(&sbi->work_lock);
733  sbi->work_queued = 0;
734  spin_unlock(&sbi->work_lock);
735 
736  ufs_sync_fs(sbi->sb, 1);
737 }
738 
739 void ufs_mark_sb_dirty(struct super_block *sb)
740 {
741  struct ufs_sb_info *sbi = UFS_SB(sb);
742  unsigned long delay;
743 
744  spin_lock(&sbi->work_lock);
745  if (!sbi->work_queued) {
746  delay = msecs_to_jiffies(dirty_writeback_interval * 10);
747  queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
748  sbi->work_queued = 1;
749  }
750  spin_unlock(&sbi->work_lock);
751 }
752 
753 static void ufs_put_super(struct super_block *sb)
754 {
755  struct ufs_sb_info * sbi = UFS_SB(sb);
756 
757  UFSD("ENTER\n");
758 
759  if (!(sb->s_flags & MS_RDONLY))
760  ufs_put_super_internal(sb);
761  cancel_delayed_work_sync(&sbi->sync_work);
762 
763  ubh_brelse_uspi (sbi->s_uspi);
764  kfree (sbi->s_uspi);
765  kfree (sbi);
766  sb->s_fs_info = NULL;
767  UFSD("EXIT\n");
768  return;
769 }
770 
771 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
772 {
773  struct ufs_sb_info * sbi;
774  struct ufs_sb_private_info * uspi;
775  struct ufs_super_block_first * usb1;
776  struct ufs_super_block_second * usb2;
777  struct ufs_super_block_third * usb3;
778  struct ufs_buffer_head * ubh;
779  struct inode *inode;
780  unsigned block_size, super_block_size;
781  unsigned flags;
782  unsigned super_block_offset;
783  unsigned maxsymlen;
784  int ret = -EINVAL;
785 
786  uspi = NULL;
787  ubh = NULL;
788  flags = 0;
789 
790  UFSD("ENTER\n");
791 
792  sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
793  if (!sbi)
794  goto failed_nomem;
795  sb->s_fs_info = sbi;
796  sbi->sb = sb;
797 
798  UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
799 
800 #ifndef CONFIG_UFS_FS_WRITE
801  if (!(sb->s_flags & MS_RDONLY)) {
802  printk("ufs was compiled with read-only support, "
803  "can't be mounted as read-write\n");
804  goto failed;
805  }
806 #endif
807  mutex_init(&sbi->mutex);
808  mutex_init(&sbi->s_lock);
809  spin_lock_init(&sbi->work_lock);
810  INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
811  /*
812  * Set default mount options
813  * Parse mount options
814  */
815  sbi->s_mount_opt = 0;
816  ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
817  if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
818  printk("wrong mount options\n");
819  goto failed;
820  }
821  if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
822  if (!silent)
823  printk("You didn't specify the type of your ufs filesystem\n\n"
824  "mount -t ufs -o ufstype="
825  "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
826  ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
827  "default is ufstype=old\n");
828  ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
829  }
830 
831  uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
832  sbi->s_uspi = uspi;
833  if (!uspi)
834  goto failed;
835  uspi->s_dirblksize = UFS_SECTOR_SIZE;
836  super_block_offset=UFS_SBLOCK;
837 
838  /* Keep 2Gig file limit. Some UFS variants need to override
839  this but as I don't know which I'll let those in the know loosen
840  the rules */
841  switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
842  case UFS_MOUNT_UFSTYPE_44BSD:
843  UFSD("ufstype=44bsd\n");
844  uspi->s_fsize = block_size = 512;
845  uspi->s_fmask = ~(512 - 1);
846  uspi->s_fshift = 9;
847  uspi->s_sbsize = super_block_size = 1536;
848  uspi->s_sbbase = 0;
849  flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
850  break;
851  case UFS_MOUNT_UFSTYPE_UFS2:
852  UFSD("ufstype=ufs2\n");
853  super_block_offset=SBLOCK_UFS2;
854  uspi->s_fsize = block_size = 512;
855  uspi->s_fmask = ~(512 - 1);
856  uspi->s_fshift = 9;
857  uspi->s_sbsize = super_block_size = 1536;
858  uspi->s_sbbase = 0;
859  flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
860  break;
861 
862  case UFS_MOUNT_UFSTYPE_SUN:
863  UFSD("ufstype=sun\n");
864  uspi->s_fsize = block_size = 1024;
865  uspi->s_fmask = ~(1024 - 1);
866  uspi->s_fshift = 10;
867  uspi->s_sbsize = super_block_size = 2048;
868  uspi->s_sbbase = 0;
869  uspi->s_maxsymlinklen = 0; /* Not supported on disk */
870  flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
871  break;
872 
873  case UFS_MOUNT_UFSTYPE_SUNOS:
874  UFSD(("ufstype=sunos\n"))
875  uspi->s_fsize = block_size = 1024;
876  uspi->s_fmask = ~(1024 - 1);
877  uspi->s_fshift = 10;
878  uspi->s_sbsize = 2048;
879  super_block_size = 2048;
880  uspi->s_sbbase = 0;
881  uspi->s_maxsymlinklen = 0; /* Not supported on disk */
882  flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
883  break;
884 
885  case UFS_MOUNT_UFSTYPE_SUNx86:
886  UFSD("ufstype=sunx86\n");
887  uspi->s_fsize = block_size = 1024;
888  uspi->s_fmask = ~(1024 - 1);
889  uspi->s_fshift = 10;
890  uspi->s_sbsize = super_block_size = 2048;
891  uspi->s_sbbase = 0;
892  uspi->s_maxsymlinklen = 0; /* Not supported on disk */
893  flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
894  break;
895 
896  case UFS_MOUNT_UFSTYPE_OLD:
897  UFSD("ufstype=old\n");
898  uspi->s_fsize = block_size = 1024;
899  uspi->s_fmask = ~(1024 - 1);
900  uspi->s_fshift = 10;
901  uspi->s_sbsize = super_block_size = 2048;
902  uspi->s_sbbase = 0;
903  flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
904  if (!(sb->s_flags & MS_RDONLY)) {
905  if (!silent)
906  printk(KERN_INFO "ufstype=old is supported read-only\n");
907  sb->s_flags |= MS_RDONLY;
908  }
909  break;
910 
911  case UFS_MOUNT_UFSTYPE_NEXTSTEP:
912  UFSD("ufstype=nextstep\n");
913  uspi->s_fsize = block_size = 1024;
914  uspi->s_fmask = ~(1024 - 1);
915  uspi->s_fshift = 10;
916  uspi->s_sbsize = super_block_size = 2048;
917  uspi->s_sbbase = 0;
918  uspi->s_dirblksize = 1024;
919  flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
920  if (!(sb->s_flags & MS_RDONLY)) {
921  if (!silent)
922  printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
923  sb->s_flags |= MS_RDONLY;
924  }
925  break;
926 
927  case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
928  UFSD("ufstype=nextstep-cd\n");
929  uspi->s_fsize = block_size = 2048;
930  uspi->s_fmask = ~(2048 - 1);
931  uspi->s_fshift = 11;
932  uspi->s_sbsize = super_block_size = 2048;
933  uspi->s_sbbase = 0;
934  uspi->s_dirblksize = 1024;
935  flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
936  if (!(sb->s_flags & MS_RDONLY)) {
937  if (!silent)
938  printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
939  sb->s_flags |= MS_RDONLY;
940  }
941  break;
942 
943  case UFS_MOUNT_UFSTYPE_OPENSTEP:
944  UFSD("ufstype=openstep\n");
945  uspi->s_fsize = block_size = 1024;
946  uspi->s_fmask = ~(1024 - 1);
947  uspi->s_fshift = 10;
948  uspi->s_sbsize = super_block_size = 2048;
949  uspi->s_sbbase = 0;
950  uspi->s_dirblksize = 1024;
951  flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
952  if (!(sb->s_flags & MS_RDONLY)) {
953  if (!silent)
954  printk(KERN_INFO "ufstype=openstep is supported read-only\n");
955  sb->s_flags |= MS_RDONLY;
956  }
957  break;
958 
959  case UFS_MOUNT_UFSTYPE_HP:
960  UFSD("ufstype=hp\n");
961  uspi->s_fsize = block_size = 1024;
962  uspi->s_fmask = ~(1024 - 1);
963  uspi->s_fshift = 10;
964  uspi->s_sbsize = super_block_size = 2048;
965  uspi->s_sbbase = 0;
966  flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
967  if (!(sb->s_flags & MS_RDONLY)) {
968  if (!silent)
969  printk(KERN_INFO "ufstype=hp is supported read-only\n");
970  sb->s_flags |= MS_RDONLY;
971  }
972  break;
973  default:
974  if (!silent)
975  printk("unknown ufstype\n");
976  goto failed;
977  }
978 
979 again:
980  if (!sb_set_blocksize(sb, block_size)) {
981  printk(KERN_ERR "UFS: failed to set blocksize\n");
982  goto failed;
983  }
984 
985  /*
986  * read ufs super block from device
987  */
988 
989  ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
990 
991  if (!ubh)
992  goto failed;
993 
994  usb1 = ubh_get_usb_first(uspi);
995  usb2 = ubh_get_usb_second(uspi);
996  usb3 = ubh_get_usb_third(uspi);
997 
998  /* Sort out mod used on SunOS 4.1.3 for fs_state */
999  uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1000  if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1001  (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1002  flags &= ~UFS_ST_MASK;
1003  flags |= UFS_ST_SUN;
1004  }
1005 
1006  /*
1007  * Check ufs magic number
1008  */
1009  sbi->s_bytesex = BYTESEX_LE;
1010  switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1011  case UFS_MAGIC:
1012  case UFS_MAGIC_BW:
1013  case UFS2_MAGIC:
1014  case UFS_MAGIC_LFN:
1015  case UFS_MAGIC_FEA:
1016  case UFS_MAGIC_4GB:
1017  goto magic_found;
1018  }
1019  sbi->s_bytesex = BYTESEX_BE;
1020  switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1021  case UFS_MAGIC:
1022  case UFS_MAGIC_BW:
1023  case UFS2_MAGIC:
1024  case UFS_MAGIC_LFN:
1025  case UFS_MAGIC_FEA:
1026  case UFS_MAGIC_4GB:
1027  goto magic_found;
1028  }
1029 
1030  if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1031  || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1032  || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1033  && uspi->s_sbbase < 256) {
1034  ubh_brelse_uspi(uspi);
1035  ubh = NULL;
1036  uspi->s_sbbase += 8;
1037  goto again;
1038  }
1039  if (!silent)
1040  printk("ufs_read_super: bad magic number\n");
1041  goto failed;
1042 
1043 magic_found:
1044  /*
1045  * Check block and fragment sizes
1046  */
1047  uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1048  uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1049  uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1050  uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1051  uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1052 
1053  if (!is_power_of_2(uspi->s_fsize)) {
1054  printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
1055  uspi->s_fsize);
1056  goto failed;
1057  }
1058  if (uspi->s_fsize < 512) {
1059  printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
1060  uspi->s_fsize);
1061  goto failed;
1062  }
1063  if (uspi->s_fsize > 4096) {
1064  printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
1065  uspi->s_fsize);
1066  goto failed;
1067  }
1068  if (!is_power_of_2(uspi->s_bsize)) {
1069  printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
1070  uspi->s_bsize);
1071  goto failed;
1072  }
1073  if (uspi->s_bsize < 4096) {
1074  printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
1075  uspi->s_bsize);
1076  goto failed;
1077  }
1078  if (uspi->s_bsize / uspi->s_fsize > 8) {
1079  printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
1080  uspi->s_bsize / uspi->s_fsize);
1081  goto failed;
1082  }
1083  if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1084  ubh_brelse_uspi(uspi);
1085  ubh = NULL;
1086  block_size = uspi->s_fsize;
1087  super_block_size = uspi->s_sbsize;
1088  UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1089  goto again;
1090  }
1091 
1092  sbi->s_flags = flags;/*after that line some functions use s_flags*/
1093  ufs_print_super_stuff(sb, usb1, usb2, usb3);
1094 
1095  /*
1096  * Check, if file system was correctly unmounted.
1097  * If not, make it read only.
1098  */
1099  if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1100  ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1101  (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1102  (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1103  (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1104  (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1105  switch(usb1->fs_clean) {
1106  case UFS_FSCLEAN:
1107  UFSD("fs is clean\n");
1108  break;
1109  case UFS_FSSTABLE:
1110  UFSD("fs is stable\n");
1111  break;
1112  case UFS_FSLOG:
1113  UFSD("fs is logging fs\n");
1114  break;
1115  case UFS_FSOSF1:
1116  UFSD("fs is DEC OSF/1\n");
1117  break;
1118  case UFS_FSACTIVE:
1119  printk("ufs_read_super: fs is active\n");
1120  sb->s_flags |= MS_RDONLY;
1121  break;
1122  case UFS_FSBAD:
1123  printk("ufs_read_super: fs is bad\n");
1124  sb->s_flags |= MS_RDONLY;
1125  break;
1126  default:
1127  printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1128  sb->s_flags |= MS_RDONLY;
1129  break;
1130  }
1131  } else {
1132  printk("ufs_read_super: fs needs fsck\n");
1133  sb->s_flags |= MS_RDONLY;
1134  }
1135 
1136  /*
1137  * Read ufs_super_block into internal data structures
1138  */
1139  sb->s_op = &ufs_super_ops;
1140  sb->s_export_op = &ufs_export_ops;
1141 
1142  sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1143 
1144  uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1145  uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1146  uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1147  uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1148  uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1149  uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1150 
1151  if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1152  uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1153  uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1154  } else {
1155  uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1156  uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1157  }
1158 
1159  uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1160  /* s_bsize already set */
1161  /* s_fsize already set */
1162  uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1163  uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1164  uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1165  uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1166  uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1167  uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1168  UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1169  uspi->s_fshift);
1170  uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1171  uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1172  /* s_sbsize already set */
1173  uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1174  uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1175  uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1176  uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1177  uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1178  uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1179  uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1180  uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1181 
1182  if (uspi->fs_magic == UFS2_MAGIC)
1183  uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1184  else
1185  uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1186 
1187  uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1188  uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1189  uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1190  uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1191  uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1192  uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1193  uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1194  uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1195  uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1196  uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1197  uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1198  uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1199  uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1200  uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1201 
1202  /*
1203  * Compute another frequently used values
1204  */
1205  uspi->s_fpbmask = uspi->s_fpb - 1;
1206  if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1207  uspi->s_apbshift = uspi->s_bshift - 3;
1208  else
1209  uspi->s_apbshift = uspi->s_bshift - 2;
1210 
1211  uspi->s_2apbshift = uspi->s_apbshift * 2;
1212  uspi->s_3apbshift = uspi->s_apbshift * 3;
1213  uspi->s_apb = 1 << uspi->s_apbshift;
1214  uspi->s_2apb = 1 << uspi->s_2apbshift;
1215  uspi->s_3apb = 1 << uspi->s_3apbshift;
1216  uspi->s_apbmask = uspi->s_apb - 1;
1217  uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1218  uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1219  uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1220  uspi->s_bpf = uspi->s_fsize << 3;
1221  uspi->s_bpfshift = uspi->s_fshift + 3;
1222  uspi->s_bpfmask = uspi->s_bpf - 1;
1223  if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1224  (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1225  uspi->s_maxsymlinklen =
1226  fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1227 
1228  if (uspi->fs_magic == UFS2_MAGIC)
1229  maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1230  else
1231  maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1232  if (uspi->s_maxsymlinklen > maxsymlen) {
1233  ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1234  "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1235  uspi->s_maxsymlinklen = maxsymlen;
1236  }
1237  sb->s_max_links = UFS_LINK_MAX;
1238 
1239  inode = ufs_iget(sb, UFS_ROOTINO);
1240  if (IS_ERR(inode)) {
1241  ret = PTR_ERR(inode);
1242  goto failed;
1243  }
1244  sb->s_root = d_make_root(inode);
1245  if (!sb->s_root) {
1246  ret = -ENOMEM;
1247  goto failed;
1248  }
1249 
1250  ufs_setup_cstotal(sb);
1251  /*
1252  * Read cylinder group structures
1253  */
1254  if (!(sb->s_flags & MS_RDONLY))
1255  if (!ufs_read_cylinder_structures(sb))
1256  goto failed;
1257 
1258  UFSD("EXIT\n");
1259  return 0;
1260 
1261 failed:
1262  if (ubh)
1263  ubh_brelse_uspi (uspi);
1264  kfree (uspi);
1265  kfree(sbi);
1266  sb->s_fs_info = NULL;
1267  UFSD("EXIT (FAILED)\n");
1268  return ret;
1269 
1270 failed_nomem:
1271  UFSD("EXIT (NOMEM)\n");
1272  return -ENOMEM;
1273 }
1274 
1275 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1276 {
1277  struct ufs_sb_private_info * uspi;
1278  struct ufs_super_block_first * usb1;
1279  struct ufs_super_block_third * usb3;
1280  unsigned new_mount_opt, ufstype;
1281  unsigned flags;
1282 
1283  lock_ufs(sb);
1284  mutex_lock(&UFS_SB(sb)->s_lock);
1285  uspi = UFS_SB(sb)->s_uspi;
1286  flags = UFS_SB(sb)->s_flags;
1287  usb1 = ubh_get_usb_first(uspi);
1288  usb3 = ubh_get_usb_third(uspi);
1289 
1290  /*
1291  * Allow the "check" option to be passed as a remount option.
1292  * It is not possible to change ufstype option during remount
1293  */
1294  ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1295  new_mount_opt = 0;
1296  ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1297  if (!ufs_parse_options (data, &new_mount_opt)) {
1298  mutex_unlock(&UFS_SB(sb)->s_lock);
1299  unlock_ufs(sb);
1300  return -EINVAL;
1301  }
1302  if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1303  new_mount_opt |= ufstype;
1304  } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1305  printk("ufstype can't be changed during remount\n");
1306  mutex_unlock(&UFS_SB(sb)->s_lock);
1307  unlock_ufs(sb);
1308  return -EINVAL;
1309  }
1310 
1311  if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1312  UFS_SB(sb)->s_mount_opt = new_mount_opt;
1313  mutex_unlock(&UFS_SB(sb)->s_lock);
1314  unlock_ufs(sb);
1315  return 0;
1316  }
1317 
1318  /*
1319  * fs was mouted as rw, remounting ro
1320  */
1321  if (*mount_flags & MS_RDONLY) {
1322  ufs_put_super_internal(sb);
1323  usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1324  if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1325  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1326  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1327  ufs_set_fs_state(sb, usb1, usb3,
1328  UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1329  ubh_mark_buffer_dirty (USPI_UBH(uspi));
1330  sb->s_flags |= MS_RDONLY;
1331  } else {
1332  /*
1333  * fs was mounted as ro, remounting rw
1334  */
1335 #ifndef CONFIG_UFS_FS_WRITE
1336  printk("ufs was compiled with read-only support, "
1337  "can't be mounted as read-write\n");
1338  mutex_unlock(&UFS_SB(sb)->s_lock);
1339  unlock_ufs(sb);
1340  return -EINVAL;
1341 #else
1342  if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1343  ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1344  ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1345  ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1346  ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1347  printk("this ufstype is read-only supported\n");
1348  mutex_unlock(&UFS_SB(sb)->s_lock);
1349  unlock_ufs(sb);
1350  return -EINVAL;
1351  }
1352  if (!ufs_read_cylinder_structures(sb)) {
1353  printk("failed during remounting\n");
1354  mutex_unlock(&UFS_SB(sb)->s_lock);
1355  unlock_ufs(sb);
1356  return -EPERM;
1357  }
1358  sb->s_flags &= ~MS_RDONLY;
1359 #endif
1360  }
1361  UFS_SB(sb)->s_mount_opt = new_mount_opt;
1362  mutex_unlock(&UFS_SB(sb)->s_lock);
1363  unlock_ufs(sb);
1364  return 0;
1365 }
1366 
1367 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1368 {
1369  struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1370  unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1371  const struct match_token *tp = tokens;
1372 
1373  while (tp->token != Opt_onerror_panic && tp->token != mval)
1374  ++tp;
1375  BUG_ON(tp->token == Opt_onerror_panic);
1376  seq_printf(seq, ",%s", tp->pattern);
1377 
1378  mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1379  while (tp->token != Opt_err && tp->token != mval)
1380  ++tp;
1381  BUG_ON(tp->token == Opt_err);
1382  seq_printf(seq, ",%s", tp->pattern);
1383 
1384  return 0;
1385 }
1386 
1387 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1388 {
1389  struct super_block *sb = dentry->d_sb;
1390  struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1391  unsigned flags = UFS_SB(sb)->s_flags;
1392  struct ufs_super_block_first *usb1;
1393  struct ufs_super_block_second *usb2;
1394  struct ufs_super_block_third *usb3;
1395  u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1396 
1397  lock_ufs(sb);
1398 
1399  usb1 = ubh_get_usb_first(uspi);
1400  usb2 = ubh_get_usb_second(uspi);
1401  usb3 = ubh_get_usb_third(uspi);
1402 
1403  if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1404  buf->f_type = UFS2_MAGIC;
1405  buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1406  } else {
1407  buf->f_type = UFS_MAGIC;
1408  buf->f_blocks = uspi->s_dsize;
1409  }
1410  buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1411  uspi->cs_total.cs_nffree;
1412  buf->f_ffree = uspi->cs_total.cs_nifree;
1413  buf->f_bsize = sb->s_blocksize;
1414  buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1415  ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1416  buf->f_files = uspi->s_ncg * uspi->s_ipg;
1417  buf->f_namelen = UFS_MAXNAMLEN;
1418  buf->f_fsid.val[0] = (u32)id;
1419  buf->f_fsid.val[1] = (u32)(id >> 32);
1420 
1421  unlock_ufs(sb);
1422 
1423  return 0;
1424 }
1425 
1426 static struct kmem_cache * ufs_inode_cachep;
1427 
1428 static struct inode *ufs_alloc_inode(struct super_block *sb)
1429 {
1430  struct ufs_inode_info *ei;
1431  ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1432  if (!ei)
1433  return NULL;
1434  ei->vfs_inode.i_version = 1;
1435  return &ei->vfs_inode;
1436 }
1437 
1438 static void ufs_i_callback(struct rcu_head *head)
1439 {
1440  struct inode *inode = container_of(head, struct inode, i_rcu);
1441  kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1442 }
1443 
1444 static void ufs_destroy_inode(struct inode *inode)
1445 {
1446  call_rcu(&inode->i_rcu, ufs_i_callback);
1447 }
1448 
1449 static void init_once(void *foo)
1450 {
1451  struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1452 
1453  inode_init_once(&ei->vfs_inode);
1454 }
1455 
1456 static int init_inodecache(void)
1457 {
1458  ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1459  sizeof(struct ufs_inode_info),
1460  0, (SLAB_RECLAIM_ACCOUNT|
1461  SLAB_MEM_SPREAD),
1462  init_once);
1463  if (ufs_inode_cachep == NULL)
1464  return -ENOMEM;
1465  return 0;
1466 }
1467 
1468 static void destroy_inodecache(void)
1469 {
1470  /*
1471  * Make sure all delayed rcu free inodes are flushed before we
1472  * destroy cache.
1473  */
1474  rcu_barrier();
1475  kmem_cache_destroy(ufs_inode_cachep);
1476 }
1477 
1478 static const struct super_operations ufs_super_ops = {
1479  .alloc_inode = ufs_alloc_inode,
1480  .destroy_inode = ufs_destroy_inode,
1481  .write_inode = ufs_write_inode,
1482  .evict_inode = ufs_evict_inode,
1483  .put_super = ufs_put_super,
1484  .sync_fs = ufs_sync_fs,
1485  .statfs = ufs_statfs,
1486  .remount_fs = ufs_remount,
1487  .show_options = ufs_show_options,
1488 };
1489 
1490 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1491  int flags, const char *dev_name, void *data)
1492 {
1493  return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1494 }
1495 
1496 static struct file_system_type ufs_fs_type = {
1497  .owner = THIS_MODULE,
1498  .name = "ufs",
1499  .mount = ufs_mount,
1500  .kill_sb = kill_block_super,
1501  .fs_flags = FS_REQUIRES_DEV,
1502 };
1503 
1504 static int __init init_ufs_fs(void)
1505 {
1506  int err = init_inodecache();
1507  if (err)
1508  goto out1;
1509  err = register_filesystem(&ufs_fs_type);
1510  if (err)
1511  goto out;
1512  return 0;
1513 out:
1514  destroy_inodecache();
1515 out1:
1516  return err;
1517 }
1518 
1519 static void __exit exit_ufs_fs(void)
1520 {
1521  unregister_filesystem(&ufs_fs_type);
1522  destroy_inodecache();
1523 }
1524 
1525 module_init(init_ufs_fs)
1526 module_exit(exit_ufs_fs)
1527 MODULE_LICENSE("GPL");
Generated on Thu Jan 10 2013 14:44:07 for Linux Kernel by   doxygen 1.8.2