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1 | /* |
2 | * linux/fs/ufs/super.c |
3 | * |
4 | * Copyright (C) 1998 |
5 | * Daniel Pirkl <daniel.pirkl@email.cz> |
6 | * Charles University, Faculty of Mathematics and Physics |
7 | */ |
8 | |
9 | /* Derived from |
10 | * |
11 | * linux/fs/ext2/super.c |
12 | * |
13 | * Copyright (C) 1992, 1993, 1994, 1995 |
14 | * Remy Card (card@masi.ibp.fr) |
15 | * Laboratoire MASI - Institut Blaise Pascal |
16 | * Universite Pierre et Marie Curie (Paris VI) |
17 | * |
18 | * from |
19 | * |
20 | * linux/fs/minix/inode.c |
21 | * |
22 | * Copyright (C) 1991, 1992 Linus Torvalds |
23 | * |
24 | * Big-endian to little-endian byte-swapping/bitmaps by |
25 | * David S. Miller (davem@caip.rutgers.edu), 1995 |
26 | */ |
27 | |
28 | /* |
29 | * Inspired by |
30 | * |
31 | * linux/fs/ufs/super.c |
32 | * |
33 | * Copyright (C) 1996 |
34 | * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) |
35 | * Laboratory for Computer Science Research Computing Facility |
36 | * Rutgers, The State University of New Jersey |
37 | * |
38 | * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) |
39 | * |
40 | * Kernel module support added on 96/04/26 by |
41 | * Stefan Reinauer <stepan@home.culture.mipt.ru> |
42 | * |
43 | * Module usage counts added on 96/04/29 by |
44 | * Gertjan van Wingerde <gwingerde@gmail.com> |
45 | * |
46 | * Clean swab support on 19970406 by |
47 | * Francois-Rene Rideau <fare@tunes.org> |
48 | * |
49 | * 4.4BSD (FreeBSD) support added on February 1st 1998 by |
50 | * Niels Kristian Bech Jensen <nkbj@image.dk> partially based |
51 | * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. |
52 | * |
53 | * NeXTstep support added on February 5th 1998 by |
54 | * Niels Kristian Bech Jensen <nkbj@image.dk>. |
55 | * |
56 | * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 |
57 | * |
58 | * HP/UX hfs filesystem support added by |
59 | * Martin K. Petersen <mkp@mkp.net>, August 1999 |
60 | * |
61 | * UFS2 (of FreeBSD 5.x) support added by |
62 | * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 |
63 | * |
64 | * UFS2 write support added by |
65 | * Evgeniy Dushistov <dushistov@mail.ru>, 2007 |
66 | */ |
67 | |
68 | |
69 | #include <linux/exportfs.h> |
70 | #include <linux/module.h> |
71 | #include <linux/bitops.h> |
72 | |
73 | #include <stdarg.h> |
74 | |
75 | #include <asm/uaccess.h> |
76 | #include <asm/system.h> |
77 | |
78 | #include <linux/errno.h> |
79 | #include <linux/fs.h> |
80 | #include <linux/quotaops.h> |
81 | #include <linux/slab.h> |
82 | #include <linux/time.h> |
83 | #include <linux/stat.h> |
84 | #include <linux/string.h> |
85 | #include <linux/blkdev.h> |
86 | #include <linux/init.h> |
87 | #include <linux/parser.h> |
88 | #include <linux/smp_lock.h> |
89 | #include <linux/buffer_head.h> |
90 | #include <linux/vfs.h> |
91 | #include <linux/log2.h> |
92 | #include <linux/mount.h> |
93 | #include <linux/seq_file.h> |
94 | |
95 | #include "ufs_fs.h" |
96 | #include "ufs.h" |
97 | #include "swab.h" |
98 | #include "util.h" |
99 | |
100 | static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) |
101 | { |
102 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
103 | struct inode *inode; |
104 | |
105 | if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) |
106 | return ERR_PTR(-ESTALE); |
107 | |
108 | inode = ufs_iget(sb, ino); |
109 | if (IS_ERR(inode)) |
110 | return ERR_CAST(inode); |
111 | if (generation && inode->i_generation != generation) { |
112 | iput(inode); |
113 | return ERR_PTR(-ESTALE); |
114 | } |
115 | return inode; |
116 | } |
117 | |
118 | static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, |
119 | int fh_len, int fh_type) |
120 | { |
121 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); |
122 | } |
123 | |
124 | static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, |
125 | int fh_len, int fh_type) |
126 | { |
127 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); |
128 | } |
129 | |
130 | static struct dentry *ufs_get_parent(struct dentry *child) |
131 | { |
132 | struct qstr dot_dot = { |
133 | .name = "..", |
134 | .len = 2, |
135 | }; |
136 | ino_t ino; |
137 | |
138 | ino = ufs_inode_by_name(child->d_inode, &dot_dot); |
139 | if (!ino) |
140 | return ERR_PTR(-ENOENT); |
141 | return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); |
142 | } |
143 | |
144 | static const struct export_operations ufs_export_ops = { |
145 | .fh_to_dentry = ufs_fh_to_dentry, |
146 | .fh_to_parent = ufs_fh_to_parent, |
147 | .get_parent = ufs_get_parent, |
148 | }; |
149 | |
150 | #ifdef CONFIG_UFS_DEBUG |
151 | /* |
152 | * Print contents of ufs_super_block, useful for debugging |
153 | */ |
154 | static void ufs_print_super_stuff(struct super_block *sb, |
155 | struct ufs_super_block_first *usb1, |
156 | struct ufs_super_block_second *usb2, |
157 | struct ufs_super_block_third *usb3) |
158 | { |
159 | u32 magic = fs32_to_cpu(sb, usb3->fs_magic); |
160 | |
161 | printk("ufs_print_super_stuff\n"); |
162 | printk(" magic: 0x%x\n", magic); |
163 | if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { |
164 | printk(" fs_size: %llu\n", (unsigned long long) |
165 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); |
166 | printk(" fs_dsize: %llu\n", (unsigned long long) |
167 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); |
168 | printk(" bsize: %u\n", |
169 | fs32_to_cpu(sb, usb1->fs_bsize)); |
170 | printk(" fsize: %u\n", |
171 | fs32_to_cpu(sb, usb1->fs_fsize)); |
172 | printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); |
173 | printk(" fs_sblockloc: %llu\n", (unsigned long long) |
174 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); |
175 | printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) |
176 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); |
177 | printk(" cs_nbfree(No of free blocks): %llu\n", |
178 | (unsigned long long) |
179 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); |
180 | printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", |
181 | (unsigned long long) |
182 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); |
183 | printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", |
184 | (unsigned long long) |
185 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); |
186 | printk(KERN_INFO" fs_maxsymlinklen: %u\n", |
187 | fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); |
188 | } else { |
189 | printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); |
190 | printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); |
191 | printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); |
192 | printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); |
193 | printk(" cgoffset: %u\n", |
194 | fs32_to_cpu(sb, usb1->fs_cgoffset)); |
195 | printk(" ~cgmask: 0x%x\n", |
196 | ~fs32_to_cpu(sb, usb1->fs_cgmask)); |
197 | printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); |
198 | printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); |
199 | printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); |
200 | printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); |
201 | printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); |
202 | printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); |
203 | printk(" fragshift: %u\n", |
204 | fs32_to_cpu(sb, usb1->fs_fragshift)); |
205 | printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); |
206 | printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); |
207 | printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); |
208 | printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); |
209 | printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); |
210 | printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); |
211 | printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); |
212 | printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); |
213 | printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); |
214 | printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); |
215 | printk(" fstodb: %u\n", |
216 | fs32_to_cpu(sb, usb1->fs_fsbtodb)); |
217 | printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); |
218 | printk(" ndir %u\n", |
219 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); |
220 | printk(" nifree %u\n", |
221 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); |
222 | printk(" nbfree %u\n", |
223 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); |
224 | printk(" nffree %u\n", |
225 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); |
226 | } |
227 | printk("\n"); |
228 | } |
229 | |
230 | /* |
231 | * Print contents of ufs_cylinder_group, useful for debugging |
232 | */ |
233 | static void ufs_print_cylinder_stuff(struct super_block *sb, |
234 | struct ufs_cylinder_group *cg) |
235 | { |
236 | printk("\nufs_print_cylinder_stuff\n"); |
237 | printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); |
238 | printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); |
239 | printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); |
240 | printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); |
241 | printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); |
242 | printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); |
243 | printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); |
244 | printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); |
245 | printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); |
246 | printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); |
247 | printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); |
248 | printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); |
249 | printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); |
250 | printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); |
251 | printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", |
252 | fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), |
253 | fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), |
254 | fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), |
255 | fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); |
256 | printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); |
257 | printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); |
258 | printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); |
259 | printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); |
260 | printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); |
261 | printk(" clustersumoff %u\n", |
262 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); |
263 | printk(" clusteroff %u\n", |
264 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); |
265 | printk(" nclusterblks %u\n", |
266 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); |
267 | printk("\n"); |
268 | } |
269 | #else |
270 | # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ |
271 | # define ufs_print_cylinder_stuff(sb, cg) /**/ |
272 | #endif /* CONFIG_UFS_DEBUG */ |
273 | |
274 | static const struct super_operations ufs_super_ops; |
275 | |
276 | static char error_buf[1024]; |
277 | |
278 | void ufs_error (struct super_block * sb, const char * function, |
279 | const char * fmt, ...) |
280 | { |
281 | struct ufs_sb_private_info * uspi; |
282 | struct ufs_super_block_first * usb1; |
283 | va_list args; |
284 | |
285 | uspi = UFS_SB(sb)->s_uspi; |
286 | usb1 = ubh_get_usb_first(uspi); |
287 | |
288 | if (!(sb->s_flags & MS_RDONLY)) { |
289 | usb1->fs_clean = UFS_FSBAD; |
290 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
291 | sb->s_dirt = 1; |
292 | sb->s_flags |= MS_RDONLY; |
293 | } |
294 | va_start (args, fmt); |
295 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
296 | va_end (args); |
297 | switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { |
298 | case UFS_MOUNT_ONERROR_PANIC: |
299 | panic ("UFS-fs panic (device %s): %s: %s\n", |
300 | sb->s_id, function, error_buf); |
301 | |
302 | case UFS_MOUNT_ONERROR_LOCK: |
303 | case UFS_MOUNT_ONERROR_UMOUNT: |
304 | case UFS_MOUNT_ONERROR_REPAIR: |
305 | printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", |
306 | sb->s_id, function, error_buf); |
307 | } |
308 | } |
309 | |
310 | void ufs_panic (struct super_block * sb, const char * function, |
311 | const char * fmt, ...) |
312 | { |
313 | struct ufs_sb_private_info * uspi; |
314 | struct ufs_super_block_first * usb1; |
315 | va_list args; |
316 | |
317 | lock_kernel(); |
318 | uspi = UFS_SB(sb)->s_uspi; |
319 | usb1 = ubh_get_usb_first(uspi); |
320 | |
321 | if (!(sb->s_flags & MS_RDONLY)) { |
322 | usb1->fs_clean = UFS_FSBAD; |
323 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
324 | sb->s_dirt = 1; |
325 | } |
326 | va_start (args, fmt); |
327 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
328 | va_end (args); |
329 | sb->s_flags |= MS_RDONLY; |
330 | printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", |
331 | sb->s_id, function, error_buf); |
332 | } |
333 | |
334 | void ufs_warning (struct super_block * sb, const char * function, |
335 | const char * fmt, ...) |
336 | { |
337 | va_list args; |
338 | |
339 | va_start (args, fmt); |
340 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
341 | va_end (args); |
342 | printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", |
343 | sb->s_id, function, error_buf); |
344 | } |
345 | |
346 | enum { |
347 | Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, |
348 | Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, |
349 | Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, |
350 | Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, |
351 | Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, |
352 | Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, |
353 | Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, |
354 | Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, |
355 | Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, |
356 | Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, |
357 | Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, |
358 | Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, |
359 | Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, |
360 | Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, |
361 | Opt_err |
362 | }; |
363 | |
364 | static const match_table_t tokens = { |
365 | {Opt_type_old, "ufstype=old"}, |
366 | {Opt_type_sunx86, "ufstype=sunx86"}, |
367 | {Opt_type_sun, "ufstype=sun"}, |
368 | {Opt_type_sunos, "ufstype=sunos"}, |
369 | {Opt_type_44bsd, "ufstype=44bsd"}, |
370 | {Opt_type_ufs2, "ufstype=ufs2"}, |
371 | {Opt_type_ufs2, "ufstype=5xbsd"}, |
372 | {Opt_type_hp, "ufstype=hp"}, |
373 | {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, |
374 | {Opt_type_nextstep, "ufstype=nextstep"}, |
375 | {Opt_type_openstep, "ufstype=openstep"}, |
376 | /*end of possible ufs types */ |
377 | {Opt_onerror_panic, "onerror=panic"}, |
378 | {Opt_onerror_lock, "onerror=lock"}, |
379 | {Opt_onerror_umount, "onerror=umount"}, |
380 | {Opt_onerror_repair, "onerror=repair"}, |
381 | {Opt_err, NULL} |
382 | }; |
383 | |
384 | static int ufs_parse_options (char * options, unsigned * mount_options) |
385 | { |
386 | char * p; |
387 | |
388 | UFSD("ENTER\n"); |
389 | |
390 | if (!options) |
391 | return 1; |
392 | |
393 | while ((p = strsep(&options, ",")) != NULL) { |
394 | substring_t args[MAX_OPT_ARGS]; |
395 | int token; |
396 | if (!*p) |
397 | continue; |
398 | |
399 | token = match_token(p, tokens, args); |
400 | switch (token) { |
401 | case Opt_type_old: |
402 | ufs_clear_opt (*mount_options, UFSTYPE); |
403 | ufs_set_opt (*mount_options, UFSTYPE_OLD); |
404 | break; |
405 | case Opt_type_sunx86: |
406 | ufs_clear_opt (*mount_options, UFSTYPE); |
407 | ufs_set_opt (*mount_options, UFSTYPE_SUNx86); |
408 | break; |
409 | case Opt_type_sun: |
410 | ufs_clear_opt (*mount_options, UFSTYPE); |
411 | ufs_set_opt (*mount_options, UFSTYPE_SUN); |
412 | break; |
413 | case Opt_type_sunos: |
414 | ufs_clear_opt(*mount_options, UFSTYPE); |
415 | ufs_set_opt(*mount_options, UFSTYPE_SUNOS); |
416 | break; |
417 | case Opt_type_44bsd: |
418 | ufs_clear_opt (*mount_options, UFSTYPE); |
419 | ufs_set_opt (*mount_options, UFSTYPE_44BSD); |
420 | break; |
421 | case Opt_type_ufs2: |
422 | ufs_clear_opt(*mount_options, UFSTYPE); |
423 | ufs_set_opt(*mount_options, UFSTYPE_UFS2); |
424 | break; |
425 | case Opt_type_hp: |
426 | ufs_clear_opt (*mount_options, UFSTYPE); |
427 | ufs_set_opt (*mount_options, UFSTYPE_HP); |
428 | break; |
429 | case Opt_type_nextstepcd: |
430 | ufs_clear_opt (*mount_options, UFSTYPE); |
431 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); |
432 | break; |
433 | case Opt_type_nextstep: |
434 | ufs_clear_opt (*mount_options, UFSTYPE); |
435 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); |
436 | break; |
437 | case Opt_type_openstep: |
438 | ufs_clear_opt (*mount_options, UFSTYPE); |
439 | ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); |
440 | break; |
441 | case Opt_onerror_panic: |
442 | ufs_clear_opt (*mount_options, ONERROR); |
443 | ufs_set_opt (*mount_options, ONERROR_PANIC); |
444 | break; |
445 | case Opt_onerror_lock: |
446 | ufs_clear_opt (*mount_options, ONERROR); |
447 | ufs_set_opt (*mount_options, ONERROR_LOCK); |
448 | break; |
449 | case Opt_onerror_umount: |
450 | ufs_clear_opt (*mount_options, ONERROR); |
451 | ufs_set_opt (*mount_options, ONERROR_UMOUNT); |
452 | break; |
453 | case Opt_onerror_repair: |
454 | printk("UFS-fs: Unable to do repair on error, " |
455 | "will lock lock instead\n"); |
456 | ufs_clear_opt (*mount_options, ONERROR); |
457 | ufs_set_opt (*mount_options, ONERROR_REPAIR); |
458 | break; |
459 | default: |
460 | printk("UFS-fs: Invalid option: \"%s\" " |
461 | "or missing value\n", p); |
462 | return 0; |
463 | } |
464 | } |
465 | return 1; |
466 | } |
467 | |
468 | /* |
469 | * Diffrent types of UFS hold fs_cstotal in different |
470 | * places, and use diffrent data structure for it. |
471 | * To make things simplier we just copy fs_cstotal to ufs_sb_private_info |
472 | */ |
473 | static void ufs_setup_cstotal(struct super_block *sb) |
474 | { |
475 | struct ufs_sb_info *sbi = UFS_SB(sb); |
476 | struct ufs_sb_private_info *uspi = sbi->s_uspi; |
477 | struct ufs_super_block_first *usb1; |
478 | struct ufs_super_block_second *usb2; |
479 | struct ufs_super_block_third *usb3; |
480 | unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; |
481 | |
482 | UFSD("ENTER, mtype=%u\n", mtype); |
483 | usb1 = ubh_get_usb_first(uspi); |
484 | usb2 = ubh_get_usb_second(uspi); |
485 | usb3 = ubh_get_usb_third(uspi); |
486 | |
487 | if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && |
488 | (usb1->fs_flags & UFS_FLAGS_UPDATED)) || |
489 | mtype == UFS_MOUNT_UFSTYPE_UFS2) { |
490 | /*we have statistic in different place, then usual*/ |
491 | uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); |
492 | uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); |
493 | uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); |
494 | uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); |
495 | } else { |
496 | uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); |
497 | uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); |
498 | uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); |
499 | uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); |
500 | } |
501 | UFSD("EXIT\n"); |
502 | } |
503 | |
504 | /* |
505 | * Read on-disk structures associated with cylinder groups |
506 | */ |
507 | static int ufs_read_cylinder_structures(struct super_block *sb) |
508 | { |
509 | struct ufs_sb_info *sbi = UFS_SB(sb); |
510 | struct ufs_sb_private_info *uspi = sbi->s_uspi; |
511 | struct ufs_buffer_head * ubh; |
512 | unsigned char * base, * space; |
513 | unsigned size, blks, i; |
514 | struct ufs_super_block_third *usb3; |
515 | |
516 | UFSD("ENTER\n"); |
517 | |
518 | usb3 = ubh_get_usb_third(uspi); |
519 | /* |
520 | * Read cs structures from (usually) first data block |
521 | * on the device. |
522 | */ |
523 | size = uspi->s_cssize; |
524 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; |
525 | base = space = kmalloc(size, GFP_KERNEL); |
526 | if (!base) |
527 | goto failed; |
528 | sbi->s_csp = (struct ufs_csum *)space; |
529 | for (i = 0; i < blks; i += uspi->s_fpb) { |
530 | size = uspi->s_bsize; |
531 | if (i + uspi->s_fpb > blks) |
532 | size = (blks - i) * uspi->s_fsize; |
533 | |
534 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
535 | |
536 | if (!ubh) |
537 | goto failed; |
538 | |
539 | ubh_ubhcpymem (space, ubh, size); |
540 | |
541 | space += size; |
542 | ubh_brelse (ubh); |
543 | ubh = NULL; |
544 | } |
545 | |
546 | /* |
547 | * Read cylinder group (we read only first fragment from block |
548 | * at this time) and prepare internal data structures for cg caching. |
549 | */ |
550 | if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) |
551 | goto failed; |
552 | for (i = 0; i < uspi->s_ncg; i++) |
553 | sbi->s_ucg[i] = NULL; |
554 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { |
555 | sbi->s_ucpi[i] = NULL; |
556 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; |
557 | } |
558 | for (i = 0; i < uspi->s_ncg; i++) { |
559 | UFSD("read cg %u\n", i); |
560 | if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) |
561 | goto failed; |
562 | if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) |
563 | goto failed; |
564 | |
565 | ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); |
566 | } |
567 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { |
568 | if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) |
569 | goto failed; |
570 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; |
571 | } |
572 | sbi->s_cg_loaded = 0; |
573 | UFSD("EXIT\n"); |
574 | return 1; |
575 | |
576 | failed: |
577 | kfree (base); |
578 | if (sbi->s_ucg) { |
579 | for (i = 0; i < uspi->s_ncg; i++) |
580 | if (sbi->s_ucg[i]) |
581 | brelse (sbi->s_ucg[i]); |
582 | kfree (sbi->s_ucg); |
583 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) |
584 | kfree (sbi->s_ucpi[i]); |
585 | } |
586 | UFSD("EXIT (FAILED)\n"); |
587 | return 0; |
588 | } |
589 | |
590 | /* |
591 | * Sync our internal copy of fs_cstotal with disk |
592 | */ |
593 | static void ufs_put_cstotal(struct super_block *sb) |
594 | { |
595 | unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; |
596 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
597 | struct ufs_super_block_first *usb1; |
598 | struct ufs_super_block_second *usb2; |
599 | struct ufs_super_block_third *usb3; |
600 | |
601 | UFSD("ENTER\n"); |
602 | usb1 = ubh_get_usb_first(uspi); |
603 | usb2 = ubh_get_usb_second(uspi); |
604 | usb3 = ubh_get_usb_third(uspi); |
605 | |
606 | if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && |
607 | (usb1->fs_flags & UFS_FLAGS_UPDATED)) || |
608 | mtype == UFS_MOUNT_UFSTYPE_UFS2) { |
609 | /*we have statistic in different place, then usual*/ |
610 | usb2->fs_un.fs_u2.cs_ndir = |
611 | cpu_to_fs64(sb, uspi->cs_total.cs_ndir); |
612 | usb2->fs_un.fs_u2.cs_nbfree = |
613 | cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); |
614 | usb3->fs_un1.fs_u2.cs_nifree = |
615 | cpu_to_fs64(sb, uspi->cs_total.cs_nifree); |
616 | usb3->fs_un1.fs_u2.cs_nffree = |
617 | cpu_to_fs64(sb, uspi->cs_total.cs_nffree); |
618 | } else { |
619 | usb1->fs_cstotal.cs_ndir = |
620 | cpu_to_fs32(sb, uspi->cs_total.cs_ndir); |
621 | usb1->fs_cstotal.cs_nbfree = |
622 | cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); |
623 | usb1->fs_cstotal.cs_nifree = |
624 | cpu_to_fs32(sb, uspi->cs_total.cs_nifree); |
625 | usb1->fs_cstotal.cs_nffree = |
626 | cpu_to_fs32(sb, uspi->cs_total.cs_nffree); |
627 | } |
628 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
629 | ufs_print_super_stuff(sb, usb1, usb2, usb3); |
630 | UFSD("EXIT\n"); |
631 | } |
632 | |
633 | /** |
634 | * ufs_put_super_internal() - put on-disk intrenal structures |
635 | * @sb: pointer to super_block structure |
636 | * Put on-disk structures associated with cylinder groups |
637 | * and write them back to disk, also update cs_total on disk |
638 | */ |
639 | static void ufs_put_super_internal(struct super_block *sb) |
640 | { |
641 | struct ufs_sb_info *sbi = UFS_SB(sb); |
642 | struct ufs_sb_private_info *uspi = sbi->s_uspi; |
643 | struct ufs_buffer_head * ubh; |
644 | unsigned char * base, * space; |
645 | unsigned blks, size, i; |
646 | |
647 | |
648 | UFSD("ENTER\n"); |
649 | |
650 | lock_kernel(); |
651 | |
652 | ufs_put_cstotal(sb); |
653 | size = uspi->s_cssize; |
654 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; |
655 | base = space = (char*) sbi->s_csp; |
656 | for (i = 0; i < blks; i += uspi->s_fpb) { |
657 | size = uspi->s_bsize; |
658 | if (i + uspi->s_fpb > blks) |
659 | size = (blks - i) * uspi->s_fsize; |
660 | |
661 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
662 | |
663 | ubh_memcpyubh (ubh, space, size); |
664 | space += size; |
665 | ubh_mark_buffer_uptodate (ubh, 1); |
666 | ubh_mark_buffer_dirty (ubh); |
667 | ubh_brelse (ubh); |
668 | } |
669 | for (i = 0; i < sbi->s_cg_loaded; i++) { |
670 | ufs_put_cylinder (sb, i); |
671 | kfree (sbi->s_ucpi[i]); |
672 | } |
673 | for (; i < UFS_MAX_GROUP_LOADED; i++) |
674 | kfree (sbi->s_ucpi[i]); |
675 | for (i = 0; i < uspi->s_ncg; i++) |
676 | brelse (sbi->s_ucg[i]); |
677 | kfree (sbi->s_ucg); |
678 | kfree (base); |
679 | |
680 | unlock_kernel(); |
681 | |
682 | UFSD("EXIT\n"); |
683 | } |
684 | |
685 | static int ufs_fill_super(struct super_block *sb, void *data, int silent) |
686 | { |
687 | struct ufs_sb_info * sbi; |
688 | struct ufs_sb_private_info * uspi; |
689 | struct ufs_super_block_first * usb1; |
690 | struct ufs_super_block_second * usb2; |
691 | struct ufs_super_block_third * usb3; |
692 | struct ufs_buffer_head * ubh; |
693 | struct inode *inode; |
694 | unsigned block_size, super_block_size; |
695 | unsigned flags; |
696 | unsigned super_block_offset; |
697 | unsigned maxsymlen; |
698 | int ret = -EINVAL; |
699 | |
700 | uspi = NULL; |
701 | ubh = NULL; |
702 | flags = 0; |
703 | |
704 | UFSD("ENTER\n"); |
705 | |
706 | sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); |
707 | if (!sbi) |
708 | goto failed_nomem; |
709 | sb->s_fs_info = sbi; |
710 | |
711 | UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); |
712 | |
713 | #ifndef CONFIG_UFS_FS_WRITE |
714 | if (!(sb->s_flags & MS_RDONLY)) { |
715 | printk("ufs was compiled with read-only support, " |
716 | "can't be mounted as read-write\n"); |
717 | goto failed; |
718 | } |
719 | #endif |
720 | /* |
721 | * Set default mount options |
722 | * Parse mount options |
723 | */ |
724 | sbi->s_mount_opt = 0; |
725 | ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); |
726 | if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { |
727 | printk("wrong mount options\n"); |
728 | goto failed; |
729 | } |
730 | if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { |
731 | if (!silent) |
732 | printk("You didn't specify the type of your ufs filesystem\n\n" |
733 | "mount -t ufs -o ufstype=" |
734 | "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" |
735 | ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " |
736 | "default is ufstype=old\n"); |
737 | ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); |
738 | } |
739 | |
740 | uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); |
741 | sbi->s_uspi = uspi; |
742 | if (!uspi) |
743 | goto failed; |
744 | uspi->s_dirblksize = UFS_SECTOR_SIZE; |
745 | super_block_offset=UFS_SBLOCK; |
746 | |
747 | /* Keep 2Gig file limit. Some UFS variants need to override |
748 | this but as I don't know which I'll let those in the know loosen |
749 | the rules */ |
750 | switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { |
751 | case UFS_MOUNT_UFSTYPE_44BSD: |
752 | UFSD("ufstype=44bsd\n"); |
753 | uspi->s_fsize = block_size = 512; |
754 | uspi->s_fmask = ~(512 - 1); |
755 | uspi->s_fshift = 9; |
756 | uspi->s_sbsize = super_block_size = 1536; |
757 | uspi->s_sbbase = 0; |
758 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
759 | break; |
760 | case UFS_MOUNT_UFSTYPE_UFS2: |
761 | UFSD("ufstype=ufs2\n"); |
762 | super_block_offset=SBLOCK_UFS2; |
763 | uspi->s_fsize = block_size = 512; |
764 | uspi->s_fmask = ~(512 - 1); |
765 | uspi->s_fshift = 9; |
766 | uspi->s_sbsize = super_block_size = 1536; |
767 | uspi->s_sbbase = 0; |
768 | flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
769 | break; |
770 | |
771 | case UFS_MOUNT_UFSTYPE_SUN: |
772 | UFSD("ufstype=sun\n"); |
773 | uspi->s_fsize = block_size = 1024; |
774 | uspi->s_fmask = ~(1024 - 1); |
775 | uspi->s_fshift = 10; |
776 | uspi->s_sbsize = super_block_size = 2048; |
777 | uspi->s_sbbase = 0; |
778 | uspi->s_maxsymlinklen = 0; /* Not supported on disk */ |
779 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; |
780 | break; |
781 | |
782 | case UFS_MOUNT_UFSTYPE_SUNOS: |
783 | UFSD(("ufstype=sunos\n")) |
784 | uspi->s_fsize = block_size = 1024; |
785 | uspi->s_fmask = ~(1024 - 1); |
786 | uspi->s_fshift = 10; |
787 | uspi->s_sbsize = 2048; |
788 | super_block_size = 2048; |
789 | uspi->s_sbbase = 0; |
790 | uspi->s_maxsymlinklen = 0; /* Not supported on disk */ |
791 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; |
792 | break; |
793 | |
794 | case UFS_MOUNT_UFSTYPE_SUNx86: |
795 | UFSD("ufstype=sunx86\n"); |
796 | uspi->s_fsize = block_size = 1024; |
797 | uspi->s_fmask = ~(1024 - 1); |
798 | uspi->s_fshift = 10; |
799 | uspi->s_sbsize = super_block_size = 2048; |
800 | uspi->s_sbbase = 0; |
801 | uspi->s_maxsymlinklen = 0; /* Not supported on disk */ |
802 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; |
803 | break; |
804 | |
805 | case UFS_MOUNT_UFSTYPE_OLD: |
806 | UFSD("ufstype=old\n"); |
807 | uspi->s_fsize = block_size = 1024; |
808 | uspi->s_fmask = ~(1024 - 1); |
809 | uspi->s_fshift = 10; |
810 | uspi->s_sbsize = super_block_size = 2048; |
811 | uspi->s_sbbase = 0; |
812 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
813 | if (!(sb->s_flags & MS_RDONLY)) { |
814 | if (!silent) |
815 | printk(KERN_INFO "ufstype=old is supported read-only\n"); |
816 | sb->s_flags |= MS_RDONLY; |
817 | } |
818 | break; |
819 | |
820 | case UFS_MOUNT_UFSTYPE_NEXTSTEP: |
821 | UFSD("ufstype=nextstep\n"); |
822 | uspi->s_fsize = block_size = 1024; |
823 | uspi->s_fmask = ~(1024 - 1); |
824 | uspi->s_fshift = 10; |
825 | uspi->s_sbsize = super_block_size = 2048; |
826 | uspi->s_sbbase = 0; |
827 | uspi->s_dirblksize = 1024; |
828 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
829 | if (!(sb->s_flags & MS_RDONLY)) { |
830 | if (!silent) |
831 | printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); |
832 | sb->s_flags |= MS_RDONLY; |
833 | } |
834 | break; |
835 | |
836 | case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: |
837 | UFSD("ufstype=nextstep-cd\n"); |
838 | uspi->s_fsize = block_size = 2048; |
839 | uspi->s_fmask = ~(2048 - 1); |
840 | uspi->s_fshift = 11; |
841 | uspi->s_sbsize = super_block_size = 2048; |
842 | uspi->s_sbbase = 0; |
843 | uspi->s_dirblksize = 1024; |
844 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
845 | if (!(sb->s_flags & MS_RDONLY)) { |
846 | if (!silent) |
847 | printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); |
848 | sb->s_flags |= MS_RDONLY; |
849 | } |
850 | break; |
851 | |
852 | case UFS_MOUNT_UFSTYPE_OPENSTEP: |
853 | UFSD("ufstype=openstep\n"); |
854 | uspi->s_fsize = block_size = 1024; |
855 | uspi->s_fmask = ~(1024 - 1); |
856 | uspi->s_fshift = 10; |
857 | uspi->s_sbsize = super_block_size = 2048; |
858 | uspi->s_sbbase = 0; |
859 | uspi->s_dirblksize = 1024; |
860 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
861 | if (!(sb->s_flags & MS_RDONLY)) { |
862 | if (!silent) |
863 | printk(KERN_INFO "ufstype=openstep is supported read-only\n"); |
864 | sb->s_flags |= MS_RDONLY; |
865 | } |
866 | break; |
867 | |
868 | case UFS_MOUNT_UFSTYPE_HP: |
869 | UFSD("ufstype=hp\n"); |
870 | uspi->s_fsize = block_size = 1024; |
871 | uspi->s_fmask = ~(1024 - 1); |
872 | uspi->s_fshift = 10; |
873 | uspi->s_sbsize = super_block_size = 2048; |
874 | uspi->s_sbbase = 0; |
875 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
876 | if (!(sb->s_flags & MS_RDONLY)) { |
877 | if (!silent) |
878 | printk(KERN_INFO "ufstype=hp is supported read-only\n"); |
879 | sb->s_flags |= MS_RDONLY; |
880 | } |
881 | break; |
882 | default: |
883 | if (!silent) |
884 | printk("unknown ufstype\n"); |
885 | goto failed; |
886 | } |
887 | |
888 | again: |
889 | if (!sb_set_blocksize(sb, block_size)) { |
890 | printk(KERN_ERR "UFS: failed to set blocksize\n"); |
891 | goto failed; |
892 | } |
893 | |
894 | /* |
895 | * read ufs super block from device |
896 | */ |
897 | |
898 | ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); |
899 | |
900 | if (!ubh) |
901 | goto failed; |
902 | |
903 | usb1 = ubh_get_usb_first(uspi); |
904 | usb2 = ubh_get_usb_second(uspi); |
905 | usb3 = ubh_get_usb_third(uspi); |
906 | |
907 | /* Sort out mod used on SunOS 4.1.3 for fs_state */ |
908 | uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); |
909 | if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && |
910 | (uspi->s_postblformat != UFS_42POSTBLFMT)) { |
911 | flags &= ~UFS_ST_MASK; |
912 | flags |= UFS_ST_SUN; |
913 | } |
914 | |
915 | /* |
916 | * Check ufs magic number |
917 | */ |
918 | sbi->s_bytesex = BYTESEX_LE; |
919 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { |
920 | case UFS_MAGIC: |
921 | case UFS2_MAGIC: |
922 | case UFS_MAGIC_LFN: |
923 | case UFS_MAGIC_FEA: |
924 | case UFS_MAGIC_4GB: |
925 | goto magic_found; |
926 | } |
927 | sbi->s_bytesex = BYTESEX_BE; |
928 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { |
929 | case UFS_MAGIC: |
930 | case UFS2_MAGIC: |
931 | case UFS_MAGIC_LFN: |
932 | case UFS_MAGIC_FEA: |
933 | case UFS_MAGIC_4GB: |
934 | goto magic_found; |
935 | } |
936 | |
937 | if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) |
938 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) |
939 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) |
940 | && uspi->s_sbbase < 256) { |
941 | ubh_brelse_uspi(uspi); |
942 | ubh = NULL; |
943 | uspi->s_sbbase += 8; |
944 | goto again; |
945 | } |
946 | if (!silent) |
947 | printk("ufs_read_super: bad magic number\n"); |
948 | goto failed; |
949 | |
950 | magic_found: |
951 | /* |
952 | * Check block and fragment sizes |
953 | */ |
954 | uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); |
955 | uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); |
956 | uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); |
957 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); |
958 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); |
959 | |
960 | if (!is_power_of_2(uspi->s_fsize)) { |
961 | printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", |
962 | uspi->s_fsize); |
963 | goto failed; |
964 | } |
965 | if (uspi->s_fsize < 512) { |
966 | printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", |
967 | uspi->s_fsize); |
968 | goto failed; |
969 | } |
970 | if (uspi->s_fsize > 4096) { |
971 | printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", |
972 | uspi->s_fsize); |
973 | goto failed; |
974 | } |
975 | if (!is_power_of_2(uspi->s_bsize)) { |
976 | printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", |
977 | uspi->s_bsize); |
978 | goto failed; |
979 | } |
980 | if (uspi->s_bsize < 4096) { |
981 | printk(KERN_ERR "ufs_read_super: block size %u is too small\n", |
982 | uspi->s_bsize); |
983 | goto failed; |
984 | } |
985 | if (uspi->s_bsize / uspi->s_fsize > 8) { |
986 | printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", |
987 | uspi->s_bsize / uspi->s_fsize); |
988 | goto failed; |
989 | } |
990 | if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { |
991 | ubh_brelse_uspi(uspi); |
992 | ubh = NULL; |
993 | block_size = uspi->s_fsize; |
994 | super_block_size = uspi->s_sbsize; |
995 | UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); |
996 | goto again; |
997 | } |
998 | |
999 | sbi->s_flags = flags;/*after that line some functions use s_flags*/ |
1000 | ufs_print_super_stuff(sb, usb1, usb2, usb3); |
1001 | |
1002 | /* |
1003 | * Check, if file system was correctly unmounted. |
1004 | * If not, make it read only. |
1005 | */ |
1006 | if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || |
1007 | ((flags & UFS_ST_MASK) == UFS_ST_OLD) || |
1008 | (((flags & UFS_ST_MASK) == UFS_ST_SUN || |
1009 | (flags & UFS_ST_MASK) == UFS_ST_SUNOS || |
1010 | (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && |
1011 | (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { |
1012 | switch(usb1->fs_clean) { |
1013 | case UFS_FSCLEAN: |
1014 | UFSD("fs is clean\n"); |
1015 | break; |
1016 | case UFS_FSSTABLE: |
1017 | UFSD("fs is stable\n"); |
1018 | break; |
1019 | case UFS_FSLOG: |
1020 | UFSD("fs is logging fs\n"); |
1021 | break; |
1022 | case UFS_FSOSF1: |
1023 | UFSD("fs is DEC OSF/1\n"); |
1024 | break; |
1025 | case UFS_FSACTIVE: |
1026 | printk("ufs_read_super: fs is active\n"); |
1027 | sb->s_flags |= MS_RDONLY; |
1028 | break; |
1029 | case UFS_FSBAD: |
1030 | printk("ufs_read_super: fs is bad\n"); |
1031 | sb->s_flags |= MS_RDONLY; |
1032 | break; |
1033 | default: |
1034 | printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); |
1035 | sb->s_flags |= MS_RDONLY; |
1036 | break; |
1037 | } |
1038 | } else { |
1039 | printk("ufs_read_super: fs needs fsck\n"); |
1040 | sb->s_flags |= MS_RDONLY; |
1041 | } |
1042 | |
1043 | /* |
1044 | * Read ufs_super_block into internal data structures |
1045 | */ |
1046 | sb->s_op = &ufs_super_ops; |
1047 | sb->s_export_op = &ufs_export_ops; |
1048 | sb->dq_op = NULL; /***/ |
1049 | sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); |
1050 | |
1051 | uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); |
1052 | uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); |
1053 | uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); |
1054 | uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); |
1055 | uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); |
1056 | uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); |
1057 | |
1058 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
1059 | uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); |
1060 | uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); |
1061 | } else { |
1062 | uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); |
1063 | uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); |
1064 | } |
1065 | |
1066 | uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); |
1067 | /* s_bsize already set */ |
1068 | /* s_fsize already set */ |
1069 | uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); |
1070 | uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); |
1071 | uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); |
1072 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); |
1073 | uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); |
1074 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); |
1075 | UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, |
1076 | uspi->s_fshift); |
1077 | uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); |
1078 | uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); |
1079 | /* s_sbsize already set */ |
1080 | uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); |
1081 | uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); |
1082 | uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); |
1083 | uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); |
1084 | uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); |
1085 | uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); |
1086 | uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); |
1087 | uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); |
1088 | |
1089 | if (uspi->fs_magic == UFS2_MAGIC) |
1090 | uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); |
1091 | else |
1092 | uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); |
1093 | |
1094 | uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); |
1095 | uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); |
1096 | uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); |
1097 | uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); |
1098 | uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); |
1099 | uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); |
1100 | uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); |
1101 | uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); |
1102 | uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); |
1103 | uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); |
1104 | uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); |
1105 | uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); |
1106 | uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); |
1107 | uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); |
1108 | |
1109 | /* |
1110 | * Compute another frequently used values |
1111 | */ |
1112 | uspi->s_fpbmask = uspi->s_fpb - 1; |
1113 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
1114 | uspi->s_apbshift = uspi->s_bshift - 3; |
1115 | else |
1116 | uspi->s_apbshift = uspi->s_bshift - 2; |
1117 | |
1118 | uspi->s_2apbshift = uspi->s_apbshift * 2; |
1119 | uspi->s_3apbshift = uspi->s_apbshift * 3; |
1120 | uspi->s_apb = 1 << uspi->s_apbshift; |
1121 | uspi->s_2apb = 1 << uspi->s_2apbshift; |
1122 | uspi->s_3apb = 1 << uspi->s_3apbshift; |
1123 | uspi->s_apbmask = uspi->s_apb - 1; |
1124 | uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; |
1125 | uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; |
1126 | uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; |
1127 | uspi->s_bpf = uspi->s_fsize << 3; |
1128 | uspi->s_bpfshift = uspi->s_fshift + 3; |
1129 | uspi->s_bpfmask = uspi->s_bpf - 1; |
1130 | if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || |
1131 | (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) |
1132 | uspi->s_maxsymlinklen = |
1133 | fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); |
1134 | |
1135 | if (uspi->fs_magic == UFS2_MAGIC) |
1136 | maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); |
1137 | else |
1138 | maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); |
1139 | if (uspi->s_maxsymlinklen > maxsymlen) { |
1140 | ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " |
1141 | "fast symlink size (%u)\n", uspi->s_maxsymlinklen); |
1142 | uspi->s_maxsymlinklen = maxsymlen; |
1143 | } |
1144 | |
1145 | inode = ufs_iget(sb, UFS_ROOTINO); |
1146 | if (IS_ERR(inode)) { |
1147 | ret = PTR_ERR(inode); |
1148 | goto failed; |
1149 | } |
1150 | sb->s_root = d_alloc_root(inode); |
1151 | if (!sb->s_root) { |
1152 | ret = -ENOMEM; |
1153 | goto dalloc_failed; |
1154 | } |
1155 | |
1156 | ufs_setup_cstotal(sb); |
1157 | /* |
1158 | * Read cylinder group structures |
1159 | */ |
1160 | if (!(sb->s_flags & MS_RDONLY)) |
1161 | if (!ufs_read_cylinder_structures(sb)) |
1162 | goto failed; |
1163 | |
1164 | UFSD("EXIT\n"); |
1165 | return 0; |
1166 | |
1167 | dalloc_failed: |
1168 | iput(inode); |
1169 | failed: |
1170 | if (ubh) |
1171 | ubh_brelse_uspi (uspi); |
1172 | kfree (uspi); |
1173 | kfree(sbi); |
1174 | sb->s_fs_info = NULL; |
1175 | UFSD("EXIT (FAILED)\n"); |
1176 | return ret; |
1177 | |
1178 | failed_nomem: |
1179 | UFSD("EXIT (NOMEM)\n"); |
1180 | return -ENOMEM; |
1181 | } |
1182 | |
1183 | static int ufs_sync_fs(struct super_block *sb, int wait) |
1184 | { |
1185 | struct ufs_sb_private_info * uspi; |
1186 | struct ufs_super_block_first * usb1; |
1187 | struct ufs_super_block_third * usb3; |
1188 | unsigned flags; |
1189 | |
1190 | lock_super(sb); |
1191 | lock_kernel(); |
1192 | |
1193 | UFSD("ENTER\n"); |
1194 | |
1195 | flags = UFS_SB(sb)->s_flags; |
1196 | uspi = UFS_SB(sb)->s_uspi; |
1197 | usb1 = ubh_get_usb_first(uspi); |
1198 | usb3 = ubh_get_usb_third(uspi); |
1199 | |
1200 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); |
1201 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN || |
1202 | (flags & UFS_ST_MASK) == UFS_ST_SUNOS || |
1203 | (flags & UFS_ST_MASK) == UFS_ST_SUNx86) |
1204 | ufs_set_fs_state(sb, usb1, usb3, |
1205 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); |
1206 | ufs_put_cstotal(sb); |
1207 | sb->s_dirt = 0; |
1208 | |
1209 | UFSD("EXIT\n"); |
1210 | unlock_kernel(); |
1211 | unlock_super(sb); |
1212 | |
1213 | return 0; |
1214 | } |
1215 | |
1216 | static void ufs_write_super(struct super_block *sb) |
1217 | { |
1218 | if (!(sb->s_flags & MS_RDONLY)) |
1219 | ufs_sync_fs(sb, 1); |
1220 | else |
1221 | sb->s_dirt = 0; |
1222 | } |
1223 | |
1224 | static void ufs_put_super(struct super_block *sb) |
1225 | { |
1226 | struct ufs_sb_info * sbi = UFS_SB(sb); |
1227 | |
1228 | UFSD("ENTER\n"); |
1229 | |
1230 | if (sb->s_dirt) |
1231 | ufs_write_super(sb); |
1232 | |
1233 | if (!(sb->s_flags & MS_RDONLY)) |
1234 | ufs_put_super_internal(sb); |
1235 | |
1236 | ubh_brelse_uspi (sbi->s_uspi); |
1237 | kfree (sbi->s_uspi); |
1238 | kfree (sbi); |
1239 | sb->s_fs_info = NULL; |
1240 | UFSD("EXIT\n"); |
1241 | return; |
1242 | } |
1243 | |
1244 | |
1245 | static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) |
1246 | { |
1247 | struct ufs_sb_private_info * uspi; |
1248 | struct ufs_super_block_first * usb1; |
1249 | struct ufs_super_block_third * usb3; |
1250 | unsigned new_mount_opt, ufstype; |
1251 | unsigned flags; |
1252 | |
1253 | lock_kernel(); |
1254 | lock_super(sb); |
1255 | uspi = UFS_SB(sb)->s_uspi; |
1256 | flags = UFS_SB(sb)->s_flags; |
1257 | usb1 = ubh_get_usb_first(uspi); |
1258 | usb3 = ubh_get_usb_third(uspi); |
1259 | |
1260 | /* |
1261 | * Allow the "check" option to be passed as a remount option. |
1262 | * It is not possible to change ufstype option during remount |
1263 | */ |
1264 | ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; |
1265 | new_mount_opt = 0; |
1266 | ufs_set_opt (new_mount_opt, ONERROR_LOCK); |
1267 | if (!ufs_parse_options (data, &new_mount_opt)) { |
1268 | unlock_super(sb); |
1269 | unlock_kernel(); |
1270 | return -EINVAL; |
1271 | } |
1272 | if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { |
1273 | new_mount_opt |= ufstype; |
1274 | } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { |
1275 | printk("ufstype can't be changed during remount\n"); |
1276 | unlock_super(sb); |
1277 | unlock_kernel(); |
1278 | return -EINVAL; |
1279 | } |
1280 | |
1281 | if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { |
1282 | UFS_SB(sb)->s_mount_opt = new_mount_opt; |
1283 | unlock_super(sb); |
1284 | unlock_kernel(); |
1285 | return 0; |
1286 | } |
1287 | |
1288 | /* |
1289 | * fs was mouted as rw, remounting ro |
1290 | */ |
1291 | if (*mount_flags & MS_RDONLY) { |
1292 | ufs_put_super_internal(sb); |
1293 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); |
1294 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN |
1295 | || (flags & UFS_ST_MASK) == UFS_ST_SUNOS |
1296 | || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) |
1297 | ufs_set_fs_state(sb, usb1, usb3, |
1298 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); |
1299 | ubh_mark_buffer_dirty (USPI_UBH(uspi)); |
1300 | sb->s_dirt = 0; |
1301 | sb->s_flags |= MS_RDONLY; |
1302 | } else { |
1303 | /* |
1304 | * fs was mounted as ro, remounting rw |
1305 | */ |
1306 | #ifndef CONFIG_UFS_FS_WRITE |
1307 | printk("ufs was compiled with read-only support, " |
1308 | "can't be mounted as read-write\n"); |
1309 | unlock_super(sb); |
1310 | unlock_kernel(); |
1311 | return -EINVAL; |
1312 | #else |
1313 | if (ufstype != UFS_MOUNT_UFSTYPE_SUN && |
1314 | ufstype != UFS_MOUNT_UFSTYPE_SUNOS && |
1315 | ufstype != UFS_MOUNT_UFSTYPE_44BSD && |
1316 | ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && |
1317 | ufstype != UFS_MOUNT_UFSTYPE_UFS2) { |
1318 | printk("this ufstype is read-only supported\n"); |
1319 | unlock_super(sb); |
1320 | unlock_kernel(); |
1321 | return -EINVAL; |
1322 | } |
1323 | if (!ufs_read_cylinder_structures(sb)) { |
1324 | printk("failed during remounting\n"); |
1325 | unlock_super(sb); |
1326 | unlock_kernel(); |
1327 | return -EPERM; |
1328 | } |
1329 | sb->s_flags &= ~MS_RDONLY; |
1330 | #endif |
1331 | } |
1332 | UFS_SB(sb)->s_mount_opt = new_mount_opt; |
1333 | unlock_super(sb); |
1334 | unlock_kernel(); |
1335 | return 0; |
1336 | } |
1337 | |
1338 | static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
1339 | { |
1340 | struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb); |
1341 | unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; |
1342 | const struct match_token *tp = tokens; |
1343 | |
1344 | while (tp->token != Opt_onerror_panic && tp->token != mval) |
1345 | ++tp; |
1346 | BUG_ON(tp->token == Opt_onerror_panic); |
1347 | seq_printf(seq, ",%s", tp->pattern); |
1348 | |
1349 | mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; |
1350 | while (tp->token != Opt_err && tp->token != mval) |
1351 | ++tp; |
1352 | BUG_ON(tp->token == Opt_err); |
1353 | seq_printf(seq, ",%s", tp->pattern); |
1354 | |
1355 | return 0; |
1356 | } |
1357 | |
1358 | static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1359 | { |
1360 | struct super_block *sb = dentry->d_sb; |
1361 | struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; |
1362 | unsigned flags = UFS_SB(sb)->s_flags; |
1363 | struct ufs_super_block_first *usb1; |
1364 | struct ufs_super_block_second *usb2; |
1365 | struct ufs_super_block_third *usb3; |
1366 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1367 | |
1368 | lock_kernel(); |
1369 | |
1370 | usb1 = ubh_get_usb_first(uspi); |
1371 | usb2 = ubh_get_usb_second(uspi); |
1372 | usb3 = ubh_get_usb_third(uspi); |
1373 | |
1374 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
1375 | buf->f_type = UFS2_MAGIC; |
1376 | buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); |
1377 | } else { |
1378 | buf->f_type = UFS_MAGIC; |
1379 | buf->f_blocks = uspi->s_dsize; |
1380 | } |
1381 | buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + |
1382 | uspi->cs_total.cs_nffree; |
1383 | buf->f_ffree = uspi->cs_total.cs_nifree; |
1384 | buf->f_bsize = sb->s_blocksize; |
1385 | buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) |
1386 | ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; |
1387 | buf->f_files = uspi->s_ncg * uspi->s_ipg; |
1388 | buf->f_namelen = UFS_MAXNAMLEN; |
1389 | buf->f_fsid.val[0] = (u32)id; |
1390 | buf->f_fsid.val[1] = (u32)(id >> 32); |
1391 | |
1392 | unlock_kernel(); |
1393 | |
1394 | return 0; |
1395 | } |
1396 | |
1397 | static struct kmem_cache * ufs_inode_cachep; |
1398 | |
1399 | static struct inode *ufs_alloc_inode(struct super_block *sb) |
1400 | { |
1401 | struct ufs_inode_info *ei; |
1402 | ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL); |
1403 | if (!ei) |
1404 | return NULL; |
1405 | ei->vfs_inode.i_version = 1; |
1406 | return &ei->vfs_inode; |
1407 | } |
1408 | |
1409 | static void ufs_destroy_inode(struct inode *inode) |
1410 | { |
1411 | kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); |
1412 | } |
1413 | |
1414 | static void init_once(void *foo) |
1415 | { |
1416 | struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; |
1417 | |
1418 | inode_init_once(&ei->vfs_inode); |
1419 | } |
1420 | |
1421 | static int init_inodecache(void) |
1422 | { |
1423 | ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", |
1424 | sizeof(struct ufs_inode_info), |
1425 | 0, (SLAB_RECLAIM_ACCOUNT| |
1426 | SLAB_MEM_SPREAD), |
1427 | init_once); |
1428 | if (ufs_inode_cachep == NULL) |
1429 | return -ENOMEM; |
1430 | return 0; |
1431 | } |
1432 | |
1433 | static void destroy_inodecache(void) |
1434 | { |
1435 | kmem_cache_destroy(ufs_inode_cachep); |
1436 | } |
1437 | |
1438 | static void ufs_clear_inode(struct inode *inode) |
1439 | { |
1440 | dquot_drop(inode); |
1441 | } |
1442 | |
1443 | #ifdef CONFIG_QUOTA |
1444 | static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); |
1445 | static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); |
1446 | #endif |
1447 | |
1448 | static const struct super_operations ufs_super_ops = { |
1449 | .alloc_inode = ufs_alloc_inode, |
1450 | .destroy_inode = ufs_destroy_inode, |
1451 | .write_inode = ufs_write_inode, |
1452 | .delete_inode = ufs_delete_inode, |
1453 | .clear_inode = ufs_clear_inode, |
1454 | .put_super = ufs_put_super, |
1455 | .write_super = ufs_write_super, |
1456 | .sync_fs = ufs_sync_fs, |
1457 | .statfs = ufs_statfs, |
1458 | .remount_fs = ufs_remount, |
1459 | .show_options = ufs_show_options, |
1460 | #ifdef CONFIG_QUOTA |
1461 | .quota_read = ufs_quota_read, |
1462 | .quota_write = ufs_quota_write, |
1463 | #endif |
1464 | }; |
1465 | |
1466 | #ifdef CONFIG_QUOTA |
1467 | |
1468 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
1469 | * acquiring the locks... As quota files are never truncated and quota code |
1470 | * itself serializes the operations (and noone else should touch the files) |
1471 | * we don't have to be afraid of races */ |
1472 | static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, |
1473 | size_t len, loff_t off) |
1474 | { |
1475 | struct inode *inode = sb_dqopt(sb)->files[type]; |
1476 | sector_t blk = off >> sb->s_blocksize_bits; |
1477 | int err = 0; |
1478 | int offset = off & (sb->s_blocksize - 1); |
1479 | int tocopy; |
1480 | size_t toread; |
1481 | struct buffer_head *bh; |
1482 | loff_t i_size = i_size_read(inode); |
1483 | |
1484 | if (off > i_size) |
1485 | return 0; |
1486 | if (off+len > i_size) |
1487 | len = i_size-off; |
1488 | toread = len; |
1489 | while (toread > 0) { |
1490 | tocopy = sb->s_blocksize - offset < toread ? |
1491 | sb->s_blocksize - offset : toread; |
1492 | |
1493 | bh = ufs_bread(inode, blk, 0, &err); |
1494 | if (err) |
1495 | return err; |
1496 | if (!bh) /* A hole? */ |
1497 | memset(data, 0, tocopy); |
1498 | else { |
1499 | memcpy(data, bh->b_data+offset, tocopy); |
1500 | brelse(bh); |
1501 | } |
1502 | offset = 0; |
1503 | toread -= tocopy; |
1504 | data += tocopy; |
1505 | blk++; |
1506 | } |
1507 | return len; |
1508 | } |
1509 | |
1510 | /* Write to quotafile */ |
1511 | static ssize_t ufs_quota_write(struct super_block *sb, int type, |
1512 | const char *data, size_t len, loff_t off) |
1513 | { |
1514 | struct inode *inode = sb_dqopt(sb)->files[type]; |
1515 | sector_t blk = off >> sb->s_blocksize_bits; |
1516 | int err = 0; |
1517 | int offset = off & (sb->s_blocksize - 1); |
1518 | int tocopy; |
1519 | size_t towrite = len; |
1520 | struct buffer_head *bh; |
1521 | |
1522 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
1523 | while (towrite > 0) { |
1524 | tocopy = sb->s_blocksize - offset < towrite ? |
1525 | sb->s_blocksize - offset : towrite; |
1526 | |
1527 | bh = ufs_bread(inode, blk, 1, &err); |
1528 | if (!bh) |
1529 | goto out; |
1530 | lock_buffer(bh); |
1531 | memcpy(bh->b_data+offset, data, tocopy); |
1532 | flush_dcache_page(bh->b_page); |
1533 | set_buffer_uptodate(bh); |
1534 | mark_buffer_dirty(bh); |
1535 | unlock_buffer(bh); |
1536 | brelse(bh); |
1537 | offset = 0; |
1538 | towrite -= tocopy; |
1539 | data += tocopy; |
1540 | blk++; |
1541 | } |
1542 | out: |
1543 | if (len == towrite) { |
1544 | mutex_unlock(&inode->i_mutex); |
1545 | return err; |
1546 | } |
1547 | if (inode->i_size < off+len-towrite) |
1548 | i_size_write(inode, off+len-towrite); |
1549 | inode->i_version++; |
1550 | inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; |
1551 | mark_inode_dirty(inode); |
1552 | mutex_unlock(&inode->i_mutex); |
1553 | return len - towrite; |
1554 | } |
1555 | |
1556 | #endif |
1557 | |
1558 | static int ufs_get_sb(struct file_system_type *fs_type, |
1559 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1560 | { |
1561 | return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); |
1562 | } |
1563 | |
1564 | static struct file_system_type ufs_fs_type = { |
1565 | .owner = THIS_MODULE, |
1566 | .name = "ufs", |
1567 | .get_sb = ufs_get_sb, |
1568 | .kill_sb = kill_block_super, |
1569 | .fs_flags = FS_REQUIRES_DEV, |
1570 | }; |
1571 | |
1572 | static int __init init_ufs_fs(void) |
1573 | { |
1574 | int err = init_inodecache(); |
1575 | if (err) |
1576 | goto out1; |
1577 | err = register_filesystem(&ufs_fs_type); |
1578 | if (err) |
1579 | goto out; |
1580 | return 0; |
1581 | out: |
1582 | destroy_inodecache(); |
1583 | out1: |
1584 | return err; |
1585 | } |
1586 | |
1587 | static void __exit exit_ufs_fs(void) |
1588 | { |
1589 | unregister_filesystem(&ufs_fs_type); |
1590 | destroy_inodecache(); |
1591 | } |
1592 | |
1593 | module_init(init_ufs_fs) |
1594 | module_exit(exit_ufs_fs) |
1595 | MODULE_LICENSE("GPL"); |
1596 |
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v2.6.34-rc5
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