Root/
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/module.h> |
70 | #include <linux/bitops.h> |
71 | |
72 | #include <stdarg.h> |
73 | |
74 | #include <asm/uaccess.h> |
75 | #include <asm/system.h> |
76 | |
77 | #include <linux/errno.h> |
78 | #include <linux/fs.h> |
79 | #include <linux/quotaops.h> |
80 | #include <linux/slab.h> |
81 | #include <linux/time.h> |
82 | #include <linux/stat.h> |
83 | #include <linux/string.h> |
84 | #include <linux/blkdev.h> |
85 | #include <linux/init.h> |
86 | #include <linux/parser.h> |
87 | #include <linux/smp_lock.h> |
88 | #include <linux/buffer_head.h> |
89 | #include <linux/vfs.h> |
90 | #include <linux/log2.h> |
91 | #include <linux/mount.h> |
92 | #include <linux/seq_file.h> |
93 | |
94 | #include "ufs_fs.h" |
95 | #include "ufs.h" |
96 | #include "swab.h" |
97 | #include "util.h" |
98 | |
99 | #ifdef CONFIG_UFS_DEBUG |
100 | /* |
101 | * Print contents of ufs_super_block, useful for debugging |
102 | */ |
103 | static void ufs_print_super_stuff(struct super_block *sb, |
104 | struct ufs_super_block_first *usb1, |
105 | struct ufs_super_block_second *usb2, |
106 | struct ufs_super_block_third *usb3) |
107 | { |
108 | u32 magic = fs32_to_cpu(sb, usb3->fs_magic); |
109 | |
110 | printk("ufs_print_super_stuff\n"); |
111 | printk(" magic: 0x%x\n", magic); |
112 | if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { |
113 | printk(" fs_size: %llu\n", (unsigned long long) |
114 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); |
115 | printk(" fs_dsize: %llu\n", (unsigned long long) |
116 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); |
117 | printk(" bsize: %u\n", |
118 | fs32_to_cpu(sb, usb1->fs_bsize)); |
119 | printk(" fsize: %u\n", |
120 | fs32_to_cpu(sb, usb1->fs_fsize)); |
121 | printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); |
122 | printk(" fs_sblockloc: %llu\n", (unsigned long long) |
123 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); |
124 | printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) |
125 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); |
126 | printk(" cs_nbfree(No of free blocks): %llu\n", |
127 | (unsigned long long) |
128 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); |
129 | printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", |
130 | (unsigned long long) |
131 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); |
132 | printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", |
133 | (unsigned long long) |
134 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); |
135 | printk(KERN_INFO" fs_maxsymlinklen: %u\n", |
136 | fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); |
137 | } else { |
138 | printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); |
139 | printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); |
140 | printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); |
141 | printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); |
142 | printk(" cgoffset: %u\n", |
143 | fs32_to_cpu(sb, usb1->fs_cgoffset)); |
144 | printk(" ~cgmask: 0x%x\n", |
145 | ~fs32_to_cpu(sb, usb1->fs_cgmask)); |
146 | printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); |
147 | printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); |
148 | printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); |
149 | printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); |
150 | printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); |
151 | printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); |
152 | printk(" fragshift: %u\n", |
153 | fs32_to_cpu(sb, usb1->fs_fragshift)); |
154 | printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); |
155 | printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); |
156 | printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); |
157 | printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); |
158 | printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); |
159 | printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); |
160 | printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); |
161 | printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); |
162 | printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); |
163 | printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); |
164 | printk(" fstodb: %u\n", |
165 | fs32_to_cpu(sb, usb1->fs_fsbtodb)); |
166 | printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); |
167 | printk(" ndir %u\n", |
168 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); |
169 | printk(" nifree %u\n", |
170 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); |
171 | printk(" nbfree %u\n", |
172 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); |
173 | printk(" nffree %u\n", |
174 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); |
175 | } |
176 | printk("\n"); |
177 | } |
178 | |
179 | /* |
180 | * Print contents of ufs_cylinder_group, useful for debugging |
181 | */ |
182 | static void ufs_print_cylinder_stuff(struct super_block *sb, |
183 | struct ufs_cylinder_group *cg) |
184 | { |
185 | printk("\nufs_print_cylinder_stuff\n"); |
186 | printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); |
187 | printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); |
188 | printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); |
189 | printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); |
190 | printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); |
191 | printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); |
192 | printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); |
193 | printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); |
194 | printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); |
195 | printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); |
196 | printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); |
197 | printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); |
198 | printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); |
199 | printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); |
200 | printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", |
201 | fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), |
202 | fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), |
203 | fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), |
204 | fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); |
205 | printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); |
206 | printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); |
207 | printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); |
208 | printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); |
209 | printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); |
210 | printk(" clustersumoff %u\n", |
211 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); |
212 | printk(" clusteroff %u\n", |
213 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); |
214 | printk(" nclusterblks %u\n", |
215 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); |
216 | printk("\n"); |
217 | } |
218 | #else |
219 | # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ |
220 | # define ufs_print_cylinder_stuff(sb, cg) /**/ |
221 | #endif /* CONFIG_UFS_DEBUG */ |
222 | |
223 | static const struct super_operations ufs_super_ops; |
224 | |
225 | static char error_buf[1024]; |
226 | |
227 | void ufs_error (struct super_block * sb, const char * function, |
228 | const char * fmt, ...) |
229 | { |
230 | struct ufs_sb_private_info * uspi; |
231 | struct ufs_super_block_first * usb1; |
232 | va_list args; |
233 | |
234 | uspi = UFS_SB(sb)->s_uspi; |
235 | usb1 = ubh_get_usb_first(uspi); |
236 | |
237 | if (!(sb->s_flags & MS_RDONLY)) { |
238 | usb1->fs_clean = UFS_FSBAD; |
239 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
240 | sb->s_dirt = 1; |
241 | sb->s_flags |= MS_RDONLY; |
242 | } |
243 | va_start (args, fmt); |
244 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
245 | va_end (args); |
246 | switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { |
247 | case UFS_MOUNT_ONERROR_PANIC: |
248 | panic ("UFS-fs panic (device %s): %s: %s\n", |
249 | sb->s_id, function, error_buf); |
250 | |
251 | case UFS_MOUNT_ONERROR_LOCK: |
252 | case UFS_MOUNT_ONERROR_UMOUNT: |
253 | case UFS_MOUNT_ONERROR_REPAIR: |
254 | printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", |
255 | sb->s_id, function, error_buf); |
256 | } |
257 | } |
258 | |
259 | void ufs_panic (struct super_block * sb, const char * function, |
260 | const char * fmt, ...) |
261 | { |
262 | struct ufs_sb_private_info * uspi; |
263 | struct ufs_super_block_first * usb1; |
264 | va_list args; |
265 | |
266 | lock_kernel(); |
267 | uspi = UFS_SB(sb)->s_uspi; |
268 | usb1 = ubh_get_usb_first(uspi); |
269 | |
270 | if (!(sb->s_flags & MS_RDONLY)) { |
271 | usb1->fs_clean = UFS_FSBAD; |
272 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
273 | sb->s_dirt = 1; |
274 | } |
275 | va_start (args, fmt); |
276 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
277 | va_end (args); |
278 | sb->s_flags |= MS_RDONLY; |
279 | printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", |
280 | sb->s_id, function, error_buf); |
281 | } |
282 | |
283 | void ufs_warning (struct super_block * sb, const char * function, |
284 | const char * fmt, ...) |
285 | { |
286 | va_list args; |
287 | |
288 | va_start (args, fmt); |
289 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
290 | va_end (args); |
291 | printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", |
292 | sb->s_id, function, error_buf); |
293 | } |
294 | |
295 | enum { |
296 | Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, |
297 | Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, |
298 | Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, |
299 | Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, |
300 | Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, |
301 | Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, |
302 | Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, |
303 | Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, |
304 | Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, |
305 | Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, |
306 | Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, |
307 | Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, |
308 | Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, |
309 | Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, |
310 | Opt_err |
311 | }; |
312 | |
313 | static const match_table_t tokens = { |
314 | {Opt_type_old, "ufstype=old"}, |
315 | {Opt_type_sunx86, "ufstype=sunx86"}, |
316 | {Opt_type_sun, "ufstype=sun"}, |
317 | {Opt_type_sunos, "ufstype=sunos"}, |
318 | {Opt_type_44bsd, "ufstype=44bsd"}, |
319 | {Opt_type_ufs2, "ufstype=ufs2"}, |
320 | {Opt_type_ufs2, "ufstype=5xbsd"}, |
321 | {Opt_type_hp, "ufstype=hp"}, |
322 | {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, |
323 | {Opt_type_nextstep, "ufstype=nextstep"}, |
324 | {Opt_type_openstep, "ufstype=openstep"}, |
325 | /*end of possible ufs types */ |
326 | {Opt_onerror_panic, "onerror=panic"}, |
327 | {Opt_onerror_lock, "onerror=lock"}, |
328 | {Opt_onerror_umount, "onerror=umount"}, |
329 | {Opt_onerror_repair, "onerror=repair"}, |
330 | {Opt_err, NULL} |
331 | }; |
332 | |
333 | static int ufs_parse_options (char * options, unsigned * mount_options) |
334 | { |
335 | char * p; |
336 | |
337 | UFSD("ENTER\n"); |
338 | |
339 | if (!options) |
340 | return 1; |
341 | |
342 | while ((p = strsep(&options, ",")) != NULL) { |
343 | substring_t args[MAX_OPT_ARGS]; |
344 | int token; |
345 | if (!*p) |
346 | continue; |
347 | |
348 | token = match_token(p, tokens, args); |
349 | switch (token) { |
350 | case Opt_type_old: |
351 | ufs_clear_opt (*mount_options, UFSTYPE); |
352 | ufs_set_opt (*mount_options, UFSTYPE_OLD); |
353 | break; |
354 | case Opt_type_sunx86: |
355 | ufs_clear_opt (*mount_options, UFSTYPE); |
356 | ufs_set_opt (*mount_options, UFSTYPE_SUNx86); |
357 | break; |
358 | case Opt_type_sun: |
359 | ufs_clear_opt (*mount_options, UFSTYPE); |
360 | ufs_set_opt (*mount_options, UFSTYPE_SUN); |
361 | break; |
362 | case Opt_type_sunos: |
363 | ufs_clear_opt(*mount_options, UFSTYPE); |
364 | ufs_set_opt(*mount_options, UFSTYPE_SUNOS); |
365 | break; |
366 | case Opt_type_44bsd: |
367 | ufs_clear_opt (*mount_options, UFSTYPE); |
368 | ufs_set_opt (*mount_options, UFSTYPE_44BSD); |
369 | break; |
370 | case Opt_type_ufs2: |
371 | ufs_clear_opt(*mount_options, UFSTYPE); |
372 | ufs_set_opt(*mount_options, UFSTYPE_UFS2); |
373 | break; |
374 | case Opt_type_hp: |
375 | ufs_clear_opt (*mount_options, UFSTYPE); |
376 | ufs_set_opt (*mount_options, UFSTYPE_HP); |
377 | break; |
378 | case Opt_type_nextstepcd: |
379 | ufs_clear_opt (*mount_options, UFSTYPE); |
380 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); |
381 | break; |
382 | case Opt_type_nextstep: |
383 | ufs_clear_opt (*mount_options, UFSTYPE); |
384 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); |
385 | break; |
386 | case Opt_type_openstep: |
387 | ufs_clear_opt (*mount_options, UFSTYPE); |
388 | ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); |
389 | break; |
390 | case Opt_onerror_panic: |
391 | ufs_clear_opt (*mount_options, ONERROR); |
392 | ufs_set_opt (*mount_options, ONERROR_PANIC); |
393 | break; |
394 | case Opt_onerror_lock: |
395 | ufs_clear_opt (*mount_options, ONERROR); |
396 | ufs_set_opt (*mount_options, ONERROR_LOCK); |
397 | break; |
398 | case Opt_onerror_umount: |
399 | ufs_clear_opt (*mount_options, ONERROR); |
400 | ufs_set_opt (*mount_options, ONERROR_UMOUNT); |
401 | break; |
402 | case Opt_onerror_repair: |
403 | printk("UFS-fs: Unable to do repair on error, " |
404 | "will lock lock instead\n"); |
405 | ufs_clear_opt (*mount_options, ONERROR); |
406 | ufs_set_opt (*mount_options, ONERROR_REPAIR); |
407 | break; |
408 | default: |
409 | printk("UFS-fs: Invalid option: \"%s\" " |
410 | "or missing value\n", p); |
411 | return 0; |
412 | } |
413 | } |
414 | return 1; |
415 | } |
416 | |
417 | /* |
418 | * Diffrent types of UFS hold fs_cstotal in different |
419 | * places, and use diffrent data structure for it. |
420 | * To make things simplier we just copy fs_cstotal to ufs_sb_private_info |
421 | */ |
422 | static void ufs_setup_cstotal(struct super_block *sb) |
423 | { |
424 | struct ufs_sb_info *sbi = UFS_SB(sb); |
425 | struct ufs_sb_private_info *uspi = sbi->s_uspi; |
426 | struct ufs_super_block_first *usb1; |
427 | struct ufs_super_block_second *usb2; |
428 | struct ufs_super_block_third *usb3; |
429 | unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; |
430 | |
431 | UFSD("ENTER, mtype=%u\n", mtype); |
432 | usb1 = ubh_get_usb_first(uspi); |
433 | usb2 = ubh_get_usb_second(uspi); |
434 | usb3 = ubh_get_usb_third(uspi); |
435 | |
436 | if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && |
437 | (usb1->fs_flags & UFS_FLAGS_UPDATED)) || |
438 | mtype == UFS_MOUNT_UFSTYPE_UFS2) { |
439 | /*we have statistic in different place, then usual*/ |
440 | uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); |
441 | uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); |
442 | uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); |
443 | uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); |
444 | } else { |
445 | uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); |
446 | uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); |
447 | uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); |
448 | uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); |
449 | } |
450 | UFSD("EXIT\n"); |
451 | } |
452 | |
453 | /* |
454 | * Read on-disk structures associated with cylinder groups |
455 | */ |
456 | static int ufs_read_cylinder_structures(struct super_block *sb) |
457 | { |
458 | struct ufs_sb_info *sbi = UFS_SB(sb); |
459 | struct ufs_sb_private_info *uspi = sbi->s_uspi; |
460 | struct ufs_buffer_head * ubh; |
461 | unsigned char * base, * space; |
462 | unsigned size, blks, i; |
463 | struct ufs_super_block_third *usb3; |
464 | |
465 | UFSD("ENTER\n"); |
466 | |
467 | usb3 = ubh_get_usb_third(uspi); |
468 | /* |
469 | * Read cs structures from (usually) first data block |
470 | * on the device. |
471 | */ |
472 | size = uspi->s_cssize; |
473 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; |
474 | base = space = kmalloc(size, GFP_KERNEL); |
475 | if (!base) |
476 | goto failed; |
477 | sbi->s_csp = (struct ufs_csum *)space; |
478 | for (i = 0; i < blks; i += uspi->s_fpb) { |
479 | size = uspi->s_bsize; |
480 | if (i + uspi->s_fpb > blks) |
481 | size = (blks - i) * uspi->s_fsize; |
482 | |
483 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
484 | |
485 | if (!ubh) |
486 | goto failed; |
487 | |
488 | ubh_ubhcpymem (space, ubh, size); |
489 | |
490 | space += size; |
491 | ubh_brelse (ubh); |
492 | ubh = NULL; |
493 | } |
494 | |
495 | /* |
496 | * Read cylinder group (we read only first fragment from block |
497 | * at this time) and prepare internal data structures for cg caching. |
498 | */ |
499 | if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) |
500 | goto failed; |
501 | for (i = 0; i < uspi->s_ncg; i++) |
502 | sbi->s_ucg[i] = NULL; |
503 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { |
504 | sbi->s_ucpi[i] = NULL; |
505 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; |
506 | } |
507 | for (i = 0; i < uspi->s_ncg; i++) { |
508 | UFSD("read cg %u\n", i); |
509 | if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) |
510 | goto failed; |
511 | if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) |
512 | goto failed; |
513 | |
514 | ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); |
515 | } |
516 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { |
517 | if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) |
518 | goto failed; |
519 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; |
520 | } |
521 | sbi->s_cg_loaded = 0; |
522 | UFSD("EXIT\n"); |
523 | return 1; |
524 | |
525 | failed: |
526 | kfree (base); |
527 | if (sbi->s_ucg) { |
528 | for (i = 0; i < uspi->s_ncg; i++) |
529 | if (sbi->s_ucg[i]) |
530 | brelse (sbi->s_ucg[i]); |
531 | kfree (sbi->s_ucg); |
532 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) |
533 | kfree (sbi->s_ucpi[i]); |
534 | } |
535 | UFSD("EXIT (FAILED)\n"); |
536 | return 0; |
537 | } |
538 | |
539 | /* |
540 | * Sync our internal copy of fs_cstotal with disk |
541 | */ |
542 | static void ufs_put_cstotal(struct super_block *sb) |
543 | { |
544 | unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; |
545 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
546 | struct ufs_super_block_first *usb1; |
547 | struct ufs_super_block_second *usb2; |
548 | struct ufs_super_block_third *usb3; |
549 | |
550 | UFSD("ENTER\n"); |
551 | usb1 = ubh_get_usb_first(uspi); |
552 | usb2 = ubh_get_usb_second(uspi); |
553 | usb3 = ubh_get_usb_third(uspi); |
554 | |
555 | if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && |
556 | (usb1->fs_flags & UFS_FLAGS_UPDATED)) || |
557 | mtype == UFS_MOUNT_UFSTYPE_UFS2) { |
558 | /*we have statistic in different place, then usual*/ |
559 | usb2->fs_un.fs_u2.cs_ndir = |
560 | cpu_to_fs64(sb, uspi->cs_total.cs_ndir); |
561 | usb2->fs_un.fs_u2.cs_nbfree = |
562 | cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); |
563 | usb3->fs_un1.fs_u2.cs_nifree = |
564 | cpu_to_fs64(sb, uspi->cs_total.cs_nifree); |
565 | usb3->fs_un1.fs_u2.cs_nffree = |
566 | cpu_to_fs64(sb, uspi->cs_total.cs_nffree); |
567 | } else { |
568 | usb1->fs_cstotal.cs_ndir = |
569 | cpu_to_fs32(sb, uspi->cs_total.cs_ndir); |
570 | usb1->fs_cstotal.cs_nbfree = |
571 | cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); |
572 | usb1->fs_cstotal.cs_nifree = |
573 | cpu_to_fs32(sb, uspi->cs_total.cs_nifree); |
574 | usb1->fs_cstotal.cs_nffree = |
575 | cpu_to_fs32(sb, uspi->cs_total.cs_nffree); |
576 | } |
577 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
578 | ufs_print_super_stuff(sb, usb1, usb2, usb3); |
579 | UFSD("EXIT\n"); |
580 | } |
581 | |
582 | /** |
583 | * ufs_put_super_internal() - put on-disk intrenal structures |
584 | * @sb: pointer to super_block structure |
585 | * Put on-disk structures associated with cylinder groups |
586 | * and write them back to disk, also update cs_total on disk |
587 | */ |
588 | static void ufs_put_super_internal(struct super_block *sb) |
589 | { |
590 | struct ufs_sb_info *sbi = UFS_SB(sb); |
591 | struct ufs_sb_private_info *uspi = sbi->s_uspi; |
592 | struct ufs_buffer_head * ubh; |
593 | unsigned char * base, * space; |
594 | unsigned blks, size, i; |
595 | |
596 | |
597 | UFSD("ENTER\n"); |
598 | |
599 | lock_kernel(); |
600 | |
601 | ufs_put_cstotal(sb); |
602 | size = uspi->s_cssize; |
603 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; |
604 | base = space = (char*) sbi->s_csp; |
605 | for (i = 0; i < blks; i += uspi->s_fpb) { |
606 | size = uspi->s_bsize; |
607 | if (i + uspi->s_fpb > blks) |
608 | size = (blks - i) * uspi->s_fsize; |
609 | |
610 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
611 | |
612 | ubh_memcpyubh (ubh, space, size); |
613 | space += size; |
614 | ubh_mark_buffer_uptodate (ubh, 1); |
615 | ubh_mark_buffer_dirty (ubh); |
616 | ubh_brelse (ubh); |
617 | } |
618 | for (i = 0; i < sbi->s_cg_loaded; i++) { |
619 | ufs_put_cylinder (sb, i); |
620 | kfree (sbi->s_ucpi[i]); |
621 | } |
622 | for (; i < UFS_MAX_GROUP_LOADED; i++) |
623 | kfree (sbi->s_ucpi[i]); |
624 | for (i = 0; i < uspi->s_ncg; i++) |
625 | brelse (sbi->s_ucg[i]); |
626 | kfree (sbi->s_ucg); |
627 | kfree (base); |
628 | |
629 | unlock_kernel(); |
630 | |
631 | UFSD("EXIT\n"); |
632 | } |
633 | |
634 | static int ufs_fill_super(struct super_block *sb, void *data, int silent) |
635 | { |
636 | struct ufs_sb_info * sbi; |
637 | struct ufs_sb_private_info * uspi; |
638 | struct ufs_super_block_first * usb1; |
639 | struct ufs_super_block_second * usb2; |
640 | struct ufs_super_block_third * usb3; |
641 | struct ufs_buffer_head * ubh; |
642 | struct inode *inode; |
643 | unsigned block_size, super_block_size; |
644 | unsigned flags; |
645 | unsigned super_block_offset; |
646 | unsigned maxsymlen; |
647 | int ret = -EINVAL; |
648 | |
649 | uspi = NULL; |
650 | ubh = NULL; |
651 | flags = 0; |
652 | |
653 | UFSD("ENTER\n"); |
654 | |
655 | sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); |
656 | if (!sbi) |
657 | goto failed_nomem; |
658 | sb->s_fs_info = sbi; |
659 | |
660 | UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); |
661 | |
662 | #ifndef CONFIG_UFS_FS_WRITE |
663 | if (!(sb->s_flags & MS_RDONLY)) { |
664 | printk("ufs was compiled with read-only support, " |
665 | "can't be mounted as read-write\n"); |
666 | goto failed; |
667 | } |
668 | #endif |
669 | /* |
670 | * Set default mount options |
671 | * Parse mount options |
672 | */ |
673 | sbi->s_mount_opt = 0; |
674 | ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); |
675 | if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { |
676 | printk("wrong mount options\n"); |
677 | goto failed; |
678 | } |
679 | if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { |
680 | if (!silent) |
681 | printk("You didn't specify the type of your ufs filesystem\n\n" |
682 | "mount -t ufs -o ufstype=" |
683 | "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" |
684 | ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " |
685 | "default is ufstype=old\n"); |
686 | ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); |
687 | } |
688 | |
689 | uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); |
690 | sbi->s_uspi = uspi; |
691 | if (!uspi) |
692 | goto failed; |
693 | uspi->s_dirblksize = UFS_SECTOR_SIZE; |
694 | super_block_offset=UFS_SBLOCK; |
695 | |
696 | /* Keep 2Gig file limit. Some UFS variants need to override |
697 | this but as I don't know which I'll let those in the know loosen |
698 | the rules */ |
699 | switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { |
700 | case UFS_MOUNT_UFSTYPE_44BSD: |
701 | UFSD("ufstype=44bsd\n"); |
702 | uspi->s_fsize = block_size = 512; |
703 | uspi->s_fmask = ~(512 - 1); |
704 | uspi->s_fshift = 9; |
705 | uspi->s_sbsize = super_block_size = 1536; |
706 | uspi->s_sbbase = 0; |
707 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
708 | break; |
709 | case UFS_MOUNT_UFSTYPE_UFS2: |
710 | UFSD("ufstype=ufs2\n"); |
711 | super_block_offset=SBLOCK_UFS2; |
712 | uspi->s_fsize = block_size = 512; |
713 | uspi->s_fmask = ~(512 - 1); |
714 | uspi->s_fshift = 9; |
715 | uspi->s_sbsize = super_block_size = 1536; |
716 | uspi->s_sbbase = 0; |
717 | flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
718 | break; |
719 | |
720 | case UFS_MOUNT_UFSTYPE_SUN: |
721 | UFSD("ufstype=sun\n"); |
722 | uspi->s_fsize = block_size = 1024; |
723 | uspi->s_fmask = ~(1024 - 1); |
724 | uspi->s_fshift = 10; |
725 | uspi->s_sbsize = super_block_size = 2048; |
726 | uspi->s_sbbase = 0; |
727 | uspi->s_maxsymlinklen = 0; /* Not supported on disk */ |
728 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; |
729 | break; |
730 | |
731 | case UFS_MOUNT_UFSTYPE_SUNOS: |
732 | UFSD(("ufstype=sunos\n")) |
733 | uspi->s_fsize = block_size = 1024; |
734 | uspi->s_fmask = ~(1024 - 1); |
735 | uspi->s_fshift = 10; |
736 | uspi->s_sbsize = 2048; |
737 | super_block_size = 2048; |
738 | uspi->s_sbbase = 0; |
739 | uspi->s_maxsymlinklen = 0; /* Not supported on disk */ |
740 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; |
741 | break; |
742 | |
743 | case UFS_MOUNT_UFSTYPE_SUNx86: |
744 | UFSD("ufstype=sunx86\n"); |
745 | uspi->s_fsize = block_size = 1024; |
746 | uspi->s_fmask = ~(1024 - 1); |
747 | uspi->s_fshift = 10; |
748 | uspi->s_sbsize = super_block_size = 2048; |
749 | uspi->s_sbbase = 0; |
750 | uspi->s_maxsymlinklen = 0; /* Not supported on disk */ |
751 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; |
752 | break; |
753 | |
754 | case UFS_MOUNT_UFSTYPE_OLD: |
755 | UFSD("ufstype=old\n"); |
756 | uspi->s_fsize = block_size = 1024; |
757 | uspi->s_fmask = ~(1024 - 1); |
758 | uspi->s_fshift = 10; |
759 | uspi->s_sbsize = super_block_size = 2048; |
760 | uspi->s_sbbase = 0; |
761 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
762 | if (!(sb->s_flags & MS_RDONLY)) { |
763 | if (!silent) |
764 | printk(KERN_INFO "ufstype=old is supported read-only\n"); |
765 | sb->s_flags |= MS_RDONLY; |
766 | } |
767 | break; |
768 | |
769 | case UFS_MOUNT_UFSTYPE_NEXTSTEP: |
770 | UFSD("ufstype=nextstep\n"); |
771 | uspi->s_fsize = block_size = 1024; |
772 | uspi->s_fmask = ~(1024 - 1); |
773 | uspi->s_fshift = 10; |
774 | uspi->s_sbsize = super_block_size = 2048; |
775 | uspi->s_sbbase = 0; |
776 | uspi->s_dirblksize = 1024; |
777 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
778 | if (!(sb->s_flags & MS_RDONLY)) { |
779 | if (!silent) |
780 | printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); |
781 | sb->s_flags |= MS_RDONLY; |
782 | } |
783 | break; |
784 | |
785 | case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: |
786 | UFSD("ufstype=nextstep-cd\n"); |
787 | uspi->s_fsize = block_size = 2048; |
788 | uspi->s_fmask = ~(2048 - 1); |
789 | uspi->s_fshift = 11; |
790 | uspi->s_sbsize = super_block_size = 2048; |
791 | uspi->s_sbbase = 0; |
792 | uspi->s_dirblksize = 1024; |
793 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
794 | if (!(sb->s_flags & MS_RDONLY)) { |
795 | if (!silent) |
796 | printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); |
797 | sb->s_flags |= MS_RDONLY; |
798 | } |
799 | break; |
800 | |
801 | case UFS_MOUNT_UFSTYPE_OPENSTEP: |
802 | UFSD("ufstype=openstep\n"); |
803 | uspi->s_fsize = block_size = 1024; |
804 | uspi->s_fmask = ~(1024 - 1); |
805 | uspi->s_fshift = 10; |
806 | uspi->s_sbsize = super_block_size = 2048; |
807 | uspi->s_sbbase = 0; |
808 | uspi->s_dirblksize = 1024; |
809 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
810 | if (!(sb->s_flags & MS_RDONLY)) { |
811 | if (!silent) |
812 | printk(KERN_INFO "ufstype=openstep is supported read-only\n"); |
813 | sb->s_flags |= MS_RDONLY; |
814 | } |
815 | break; |
816 | |
817 | case UFS_MOUNT_UFSTYPE_HP: |
818 | UFSD("ufstype=hp\n"); |
819 | uspi->s_fsize = block_size = 1024; |
820 | uspi->s_fmask = ~(1024 - 1); |
821 | uspi->s_fshift = 10; |
822 | uspi->s_sbsize = super_block_size = 2048; |
823 | uspi->s_sbbase = 0; |
824 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
825 | if (!(sb->s_flags & MS_RDONLY)) { |
826 | if (!silent) |
827 | printk(KERN_INFO "ufstype=hp is supported read-only\n"); |
828 | sb->s_flags |= MS_RDONLY; |
829 | } |
830 | break; |
831 | default: |
832 | if (!silent) |
833 | printk("unknown ufstype\n"); |
834 | goto failed; |
835 | } |
836 | |
837 | again: |
838 | if (!sb_set_blocksize(sb, block_size)) { |
839 | printk(KERN_ERR "UFS: failed to set blocksize\n"); |
840 | goto failed; |
841 | } |
842 | |
843 | /* |
844 | * read ufs super block from device |
845 | */ |
846 | |
847 | ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); |
848 | |
849 | if (!ubh) |
850 | goto failed; |
851 | |
852 | usb1 = ubh_get_usb_first(uspi); |
853 | usb2 = ubh_get_usb_second(uspi); |
854 | usb3 = ubh_get_usb_third(uspi); |
855 | |
856 | /* Sort out mod used on SunOS 4.1.3 for fs_state */ |
857 | uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); |
858 | if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && |
859 | (uspi->s_postblformat != UFS_42POSTBLFMT)) { |
860 | flags &= ~UFS_ST_MASK; |
861 | flags |= UFS_ST_SUN; |
862 | } |
863 | |
864 | /* |
865 | * Check ufs magic number |
866 | */ |
867 | sbi->s_bytesex = BYTESEX_LE; |
868 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { |
869 | case UFS_MAGIC: |
870 | case UFS2_MAGIC: |
871 | case UFS_MAGIC_LFN: |
872 | case UFS_MAGIC_FEA: |
873 | case UFS_MAGIC_4GB: |
874 | goto magic_found; |
875 | } |
876 | sbi->s_bytesex = BYTESEX_BE; |
877 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { |
878 | case UFS_MAGIC: |
879 | case UFS2_MAGIC: |
880 | case UFS_MAGIC_LFN: |
881 | case UFS_MAGIC_FEA: |
882 | case UFS_MAGIC_4GB: |
883 | goto magic_found; |
884 | } |
885 | |
886 | if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) |
887 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) |
888 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) |
889 | && uspi->s_sbbase < 256) { |
890 | ubh_brelse_uspi(uspi); |
891 | ubh = NULL; |
892 | uspi->s_sbbase += 8; |
893 | goto again; |
894 | } |
895 | if (!silent) |
896 | printk("ufs_read_super: bad magic number\n"); |
897 | goto failed; |
898 | |
899 | magic_found: |
900 | /* |
901 | * Check block and fragment sizes |
902 | */ |
903 | uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); |
904 | uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); |
905 | uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); |
906 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); |
907 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); |
908 | |
909 | if (!is_power_of_2(uspi->s_fsize)) { |
910 | printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", |
911 | uspi->s_fsize); |
912 | goto failed; |
913 | } |
914 | if (uspi->s_fsize < 512) { |
915 | printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", |
916 | uspi->s_fsize); |
917 | goto failed; |
918 | } |
919 | if (uspi->s_fsize > 4096) { |
920 | printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", |
921 | uspi->s_fsize); |
922 | goto failed; |
923 | } |
924 | if (!is_power_of_2(uspi->s_bsize)) { |
925 | printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", |
926 | uspi->s_bsize); |
927 | goto failed; |
928 | } |
929 | if (uspi->s_bsize < 4096) { |
930 | printk(KERN_ERR "ufs_read_super: block size %u is too small\n", |
931 | uspi->s_bsize); |
932 | goto failed; |
933 | } |
934 | if (uspi->s_bsize / uspi->s_fsize > 8) { |
935 | printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", |
936 | uspi->s_bsize / uspi->s_fsize); |
937 | goto failed; |
938 | } |
939 | if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { |
940 | ubh_brelse_uspi(uspi); |
941 | ubh = NULL; |
942 | block_size = uspi->s_fsize; |
943 | super_block_size = uspi->s_sbsize; |
944 | UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); |
945 | goto again; |
946 | } |
947 | |
948 | sbi->s_flags = flags;/*after that line some functions use s_flags*/ |
949 | ufs_print_super_stuff(sb, usb1, usb2, usb3); |
950 | |
951 | /* |
952 | * Check, if file system was correctly unmounted. |
953 | * If not, make it read only. |
954 | */ |
955 | if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || |
956 | ((flags & UFS_ST_MASK) == UFS_ST_OLD) || |
957 | (((flags & UFS_ST_MASK) == UFS_ST_SUN || |
958 | (flags & UFS_ST_MASK) == UFS_ST_SUNOS || |
959 | (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && |
960 | (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { |
961 | switch(usb1->fs_clean) { |
962 | case UFS_FSCLEAN: |
963 | UFSD("fs is clean\n"); |
964 | break; |
965 | case UFS_FSSTABLE: |
966 | UFSD("fs is stable\n"); |
967 | break; |
968 | case UFS_FSOSF1: |
969 | UFSD("fs is DEC OSF/1\n"); |
970 | break; |
971 | case UFS_FSACTIVE: |
972 | printk("ufs_read_super: fs is active\n"); |
973 | sb->s_flags |= MS_RDONLY; |
974 | break; |
975 | case UFS_FSBAD: |
976 | printk("ufs_read_super: fs is bad\n"); |
977 | sb->s_flags |= MS_RDONLY; |
978 | break; |
979 | default: |
980 | printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); |
981 | sb->s_flags |= MS_RDONLY; |
982 | break; |
983 | } |
984 | } else { |
985 | printk("ufs_read_super: fs needs fsck\n"); |
986 | sb->s_flags |= MS_RDONLY; |
987 | } |
988 | |
989 | /* |
990 | * Read ufs_super_block into internal data structures |
991 | */ |
992 | sb->s_op = &ufs_super_ops; |
993 | sb->dq_op = NULL; /***/ |
994 | sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); |
995 | |
996 | uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); |
997 | uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); |
998 | uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); |
999 | uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); |
1000 | uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); |
1001 | uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); |
1002 | |
1003 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
1004 | uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); |
1005 | uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); |
1006 | } else { |
1007 | uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); |
1008 | uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); |
1009 | } |
1010 | |
1011 | uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); |
1012 | /* s_bsize already set */ |
1013 | /* s_fsize already set */ |
1014 | uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); |
1015 | uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); |
1016 | uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); |
1017 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); |
1018 | uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); |
1019 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); |
1020 | UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, |
1021 | uspi->s_fshift); |
1022 | uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); |
1023 | uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); |
1024 | /* s_sbsize already set */ |
1025 | uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); |
1026 | uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); |
1027 | uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); |
1028 | uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); |
1029 | uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); |
1030 | uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); |
1031 | uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); |
1032 | uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); |
1033 | |
1034 | if (uspi->fs_magic == UFS2_MAGIC) |
1035 | uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); |
1036 | else |
1037 | uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); |
1038 | |
1039 | uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); |
1040 | uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); |
1041 | uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); |
1042 | uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); |
1043 | uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); |
1044 | uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); |
1045 | uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); |
1046 | uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); |
1047 | uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); |
1048 | uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); |
1049 | uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); |
1050 | uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); |
1051 | uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); |
1052 | uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); |
1053 | |
1054 | /* |
1055 | * Compute another frequently used values |
1056 | */ |
1057 | uspi->s_fpbmask = uspi->s_fpb - 1; |
1058 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
1059 | uspi->s_apbshift = uspi->s_bshift - 3; |
1060 | else |
1061 | uspi->s_apbshift = uspi->s_bshift - 2; |
1062 | |
1063 | uspi->s_2apbshift = uspi->s_apbshift * 2; |
1064 | uspi->s_3apbshift = uspi->s_apbshift * 3; |
1065 | uspi->s_apb = 1 << uspi->s_apbshift; |
1066 | uspi->s_2apb = 1 << uspi->s_2apbshift; |
1067 | uspi->s_3apb = 1 << uspi->s_3apbshift; |
1068 | uspi->s_apbmask = uspi->s_apb - 1; |
1069 | uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; |
1070 | uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; |
1071 | uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; |
1072 | uspi->s_bpf = uspi->s_fsize << 3; |
1073 | uspi->s_bpfshift = uspi->s_fshift + 3; |
1074 | uspi->s_bpfmask = uspi->s_bpf - 1; |
1075 | if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || |
1076 | (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) |
1077 | uspi->s_maxsymlinklen = |
1078 | fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); |
1079 | |
1080 | if (uspi->fs_magic == UFS2_MAGIC) |
1081 | maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); |
1082 | else |
1083 | maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); |
1084 | if (uspi->s_maxsymlinklen > maxsymlen) { |
1085 | ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " |
1086 | "fast symlink size (%u)\n", uspi->s_maxsymlinklen); |
1087 | uspi->s_maxsymlinklen = maxsymlen; |
1088 | } |
1089 | |
1090 | inode = ufs_iget(sb, UFS_ROOTINO); |
1091 | if (IS_ERR(inode)) { |
1092 | ret = PTR_ERR(inode); |
1093 | goto failed; |
1094 | } |
1095 | sb->s_root = d_alloc_root(inode); |
1096 | if (!sb->s_root) { |
1097 | ret = -ENOMEM; |
1098 | goto dalloc_failed; |
1099 | } |
1100 | |
1101 | ufs_setup_cstotal(sb); |
1102 | /* |
1103 | * Read cylinder group structures |
1104 | */ |
1105 | if (!(sb->s_flags & MS_RDONLY)) |
1106 | if (!ufs_read_cylinder_structures(sb)) |
1107 | goto failed; |
1108 | |
1109 | UFSD("EXIT\n"); |
1110 | return 0; |
1111 | |
1112 | dalloc_failed: |
1113 | iput(inode); |
1114 | failed: |
1115 | if (ubh) |
1116 | ubh_brelse_uspi (uspi); |
1117 | kfree (uspi); |
1118 | kfree(sbi); |
1119 | sb->s_fs_info = NULL; |
1120 | UFSD("EXIT (FAILED)\n"); |
1121 | return ret; |
1122 | |
1123 | failed_nomem: |
1124 | UFSD("EXIT (NOMEM)\n"); |
1125 | return -ENOMEM; |
1126 | } |
1127 | |
1128 | static int ufs_sync_fs(struct super_block *sb, int wait) |
1129 | { |
1130 | struct ufs_sb_private_info * uspi; |
1131 | struct ufs_super_block_first * usb1; |
1132 | struct ufs_super_block_third * usb3; |
1133 | unsigned flags; |
1134 | |
1135 | lock_super(sb); |
1136 | lock_kernel(); |
1137 | |
1138 | UFSD("ENTER\n"); |
1139 | |
1140 | flags = UFS_SB(sb)->s_flags; |
1141 | uspi = UFS_SB(sb)->s_uspi; |
1142 | usb1 = ubh_get_usb_first(uspi); |
1143 | usb3 = ubh_get_usb_third(uspi); |
1144 | |
1145 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); |
1146 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN || |
1147 | (flags & UFS_ST_MASK) == UFS_ST_SUNOS || |
1148 | (flags & UFS_ST_MASK) == UFS_ST_SUNx86) |
1149 | ufs_set_fs_state(sb, usb1, usb3, |
1150 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); |
1151 | ufs_put_cstotal(sb); |
1152 | sb->s_dirt = 0; |
1153 | |
1154 | UFSD("EXIT\n"); |
1155 | unlock_kernel(); |
1156 | unlock_super(sb); |
1157 | |
1158 | return 0; |
1159 | } |
1160 | |
1161 | static void ufs_write_super(struct super_block *sb) |
1162 | { |
1163 | if (!(sb->s_flags & MS_RDONLY)) |
1164 | ufs_sync_fs(sb, 1); |
1165 | else |
1166 | sb->s_dirt = 0; |
1167 | } |
1168 | |
1169 | static void ufs_put_super(struct super_block *sb) |
1170 | { |
1171 | struct ufs_sb_info * sbi = UFS_SB(sb); |
1172 | |
1173 | UFSD("ENTER\n"); |
1174 | |
1175 | if (sb->s_dirt) |
1176 | ufs_write_super(sb); |
1177 | |
1178 | if (!(sb->s_flags & MS_RDONLY)) |
1179 | ufs_put_super_internal(sb); |
1180 | |
1181 | ubh_brelse_uspi (sbi->s_uspi); |
1182 | kfree (sbi->s_uspi); |
1183 | kfree (sbi); |
1184 | sb->s_fs_info = NULL; |
1185 | UFSD("EXIT\n"); |
1186 | return; |
1187 | } |
1188 | |
1189 | |
1190 | static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) |
1191 | { |
1192 | struct ufs_sb_private_info * uspi; |
1193 | struct ufs_super_block_first * usb1; |
1194 | struct ufs_super_block_third * usb3; |
1195 | unsigned new_mount_opt, ufstype; |
1196 | unsigned flags; |
1197 | |
1198 | lock_kernel(); |
1199 | lock_super(sb); |
1200 | uspi = UFS_SB(sb)->s_uspi; |
1201 | flags = UFS_SB(sb)->s_flags; |
1202 | usb1 = ubh_get_usb_first(uspi); |
1203 | usb3 = ubh_get_usb_third(uspi); |
1204 | |
1205 | /* |
1206 | * Allow the "check" option to be passed as a remount option. |
1207 | * It is not possible to change ufstype option during remount |
1208 | */ |
1209 | ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; |
1210 | new_mount_opt = 0; |
1211 | ufs_set_opt (new_mount_opt, ONERROR_LOCK); |
1212 | if (!ufs_parse_options (data, &new_mount_opt)) { |
1213 | unlock_super(sb); |
1214 | unlock_kernel(); |
1215 | return -EINVAL; |
1216 | } |
1217 | if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { |
1218 | new_mount_opt |= ufstype; |
1219 | } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { |
1220 | printk("ufstype can't be changed during remount\n"); |
1221 | unlock_super(sb); |
1222 | unlock_kernel(); |
1223 | return -EINVAL; |
1224 | } |
1225 | |
1226 | if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { |
1227 | UFS_SB(sb)->s_mount_opt = new_mount_opt; |
1228 | unlock_super(sb); |
1229 | unlock_kernel(); |
1230 | return 0; |
1231 | } |
1232 | |
1233 | /* |
1234 | * fs was mouted as rw, remounting ro |
1235 | */ |
1236 | if (*mount_flags & MS_RDONLY) { |
1237 | ufs_put_super_internal(sb); |
1238 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); |
1239 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN |
1240 | || (flags & UFS_ST_MASK) == UFS_ST_SUNOS |
1241 | || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) |
1242 | ufs_set_fs_state(sb, usb1, usb3, |
1243 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); |
1244 | ubh_mark_buffer_dirty (USPI_UBH(uspi)); |
1245 | sb->s_dirt = 0; |
1246 | sb->s_flags |= MS_RDONLY; |
1247 | } else { |
1248 | /* |
1249 | * fs was mounted as ro, remounting rw |
1250 | */ |
1251 | #ifndef CONFIG_UFS_FS_WRITE |
1252 | printk("ufs was compiled with read-only support, " |
1253 | "can't be mounted as read-write\n"); |
1254 | unlock_super(sb); |
1255 | unlock_kernel(); |
1256 | return -EINVAL; |
1257 | #else |
1258 | if (ufstype != UFS_MOUNT_UFSTYPE_SUN && |
1259 | ufstype != UFS_MOUNT_UFSTYPE_SUNOS && |
1260 | ufstype != UFS_MOUNT_UFSTYPE_44BSD && |
1261 | ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && |
1262 | ufstype != UFS_MOUNT_UFSTYPE_UFS2) { |
1263 | printk("this ufstype is read-only supported\n"); |
1264 | unlock_super(sb); |
1265 | unlock_kernel(); |
1266 | return -EINVAL; |
1267 | } |
1268 | if (!ufs_read_cylinder_structures(sb)) { |
1269 | printk("failed during remounting\n"); |
1270 | unlock_super(sb); |
1271 | unlock_kernel(); |
1272 | return -EPERM; |
1273 | } |
1274 | sb->s_flags &= ~MS_RDONLY; |
1275 | #endif |
1276 | } |
1277 | UFS_SB(sb)->s_mount_opt = new_mount_opt; |
1278 | unlock_super(sb); |
1279 | unlock_kernel(); |
1280 | return 0; |
1281 | } |
1282 | |
1283 | static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
1284 | { |
1285 | struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb); |
1286 | unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; |
1287 | const struct match_token *tp = tokens; |
1288 | |
1289 | while (tp->token != Opt_onerror_panic && tp->token != mval) |
1290 | ++tp; |
1291 | BUG_ON(tp->token == Opt_onerror_panic); |
1292 | seq_printf(seq, ",%s", tp->pattern); |
1293 | |
1294 | mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; |
1295 | while (tp->token != Opt_err && tp->token != mval) |
1296 | ++tp; |
1297 | BUG_ON(tp->token == Opt_err); |
1298 | seq_printf(seq, ",%s", tp->pattern); |
1299 | |
1300 | return 0; |
1301 | } |
1302 | |
1303 | static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1304 | { |
1305 | struct super_block *sb = dentry->d_sb; |
1306 | struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; |
1307 | unsigned flags = UFS_SB(sb)->s_flags; |
1308 | struct ufs_super_block_first *usb1; |
1309 | struct ufs_super_block_second *usb2; |
1310 | struct ufs_super_block_third *usb3; |
1311 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1312 | |
1313 | lock_kernel(); |
1314 | |
1315 | usb1 = ubh_get_usb_first(uspi); |
1316 | usb2 = ubh_get_usb_second(uspi); |
1317 | usb3 = ubh_get_usb_third(uspi); |
1318 | |
1319 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
1320 | buf->f_type = UFS2_MAGIC; |
1321 | buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); |
1322 | } else { |
1323 | buf->f_type = UFS_MAGIC; |
1324 | buf->f_blocks = uspi->s_dsize; |
1325 | } |
1326 | buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + |
1327 | uspi->cs_total.cs_nffree; |
1328 | buf->f_ffree = uspi->cs_total.cs_nifree; |
1329 | buf->f_bsize = sb->s_blocksize; |
1330 | buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) |
1331 | ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; |
1332 | buf->f_files = uspi->s_ncg * uspi->s_ipg; |
1333 | buf->f_namelen = UFS_MAXNAMLEN; |
1334 | buf->f_fsid.val[0] = (u32)id; |
1335 | buf->f_fsid.val[1] = (u32)(id >> 32); |
1336 | |
1337 | unlock_kernel(); |
1338 | |
1339 | return 0; |
1340 | } |
1341 | |
1342 | static struct kmem_cache * ufs_inode_cachep; |
1343 | |
1344 | static struct inode *ufs_alloc_inode(struct super_block *sb) |
1345 | { |
1346 | struct ufs_inode_info *ei; |
1347 | ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL); |
1348 | if (!ei) |
1349 | return NULL; |
1350 | ei->vfs_inode.i_version = 1; |
1351 | return &ei->vfs_inode; |
1352 | } |
1353 | |
1354 | static void ufs_destroy_inode(struct inode *inode) |
1355 | { |
1356 | kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); |
1357 | } |
1358 | |
1359 | static void init_once(void *foo) |
1360 | { |
1361 | struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; |
1362 | |
1363 | inode_init_once(&ei->vfs_inode); |
1364 | } |
1365 | |
1366 | static int init_inodecache(void) |
1367 | { |
1368 | ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", |
1369 | sizeof(struct ufs_inode_info), |
1370 | 0, (SLAB_RECLAIM_ACCOUNT| |
1371 | SLAB_MEM_SPREAD), |
1372 | init_once); |
1373 | if (ufs_inode_cachep == NULL) |
1374 | return -ENOMEM; |
1375 | return 0; |
1376 | } |
1377 | |
1378 | static void destroy_inodecache(void) |
1379 | { |
1380 | kmem_cache_destroy(ufs_inode_cachep); |
1381 | } |
1382 | |
1383 | #ifdef CONFIG_QUOTA |
1384 | static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); |
1385 | static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); |
1386 | #endif |
1387 | |
1388 | static const struct super_operations ufs_super_ops = { |
1389 | .alloc_inode = ufs_alloc_inode, |
1390 | .destroy_inode = ufs_destroy_inode, |
1391 | .write_inode = ufs_write_inode, |
1392 | .delete_inode = ufs_delete_inode, |
1393 | .put_super = ufs_put_super, |
1394 | .write_super = ufs_write_super, |
1395 | .sync_fs = ufs_sync_fs, |
1396 | .statfs = ufs_statfs, |
1397 | .remount_fs = ufs_remount, |
1398 | .show_options = ufs_show_options, |
1399 | #ifdef CONFIG_QUOTA |
1400 | .quota_read = ufs_quota_read, |
1401 | .quota_write = ufs_quota_write, |
1402 | #endif |
1403 | }; |
1404 | |
1405 | #ifdef CONFIG_QUOTA |
1406 | |
1407 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
1408 | * acquiring the locks... As quota files are never truncated and quota code |
1409 | * itself serializes the operations (and noone else should touch the files) |
1410 | * we don't have to be afraid of races */ |
1411 | static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, |
1412 | size_t len, loff_t off) |
1413 | { |
1414 | struct inode *inode = sb_dqopt(sb)->files[type]; |
1415 | sector_t blk = off >> sb->s_blocksize_bits; |
1416 | int err = 0; |
1417 | int offset = off & (sb->s_blocksize - 1); |
1418 | int tocopy; |
1419 | size_t toread; |
1420 | struct buffer_head *bh; |
1421 | loff_t i_size = i_size_read(inode); |
1422 | |
1423 | if (off > i_size) |
1424 | return 0; |
1425 | if (off+len > i_size) |
1426 | len = i_size-off; |
1427 | toread = len; |
1428 | while (toread > 0) { |
1429 | tocopy = sb->s_blocksize - offset < toread ? |
1430 | sb->s_blocksize - offset : toread; |
1431 | |
1432 | bh = ufs_bread(inode, blk, 0, &err); |
1433 | if (err) |
1434 | return err; |
1435 | if (!bh) /* A hole? */ |
1436 | memset(data, 0, tocopy); |
1437 | else { |
1438 | memcpy(data, bh->b_data+offset, tocopy); |
1439 | brelse(bh); |
1440 | } |
1441 | offset = 0; |
1442 | toread -= tocopy; |
1443 | data += tocopy; |
1444 | blk++; |
1445 | } |
1446 | return len; |
1447 | } |
1448 | |
1449 | /* Write to quotafile */ |
1450 | static ssize_t ufs_quota_write(struct super_block *sb, int type, |
1451 | const char *data, size_t len, loff_t off) |
1452 | { |
1453 | struct inode *inode = sb_dqopt(sb)->files[type]; |
1454 | sector_t blk = off >> sb->s_blocksize_bits; |
1455 | int err = 0; |
1456 | int offset = off & (sb->s_blocksize - 1); |
1457 | int tocopy; |
1458 | size_t towrite = len; |
1459 | struct buffer_head *bh; |
1460 | |
1461 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
1462 | while (towrite > 0) { |
1463 | tocopy = sb->s_blocksize - offset < towrite ? |
1464 | sb->s_blocksize - offset : towrite; |
1465 | |
1466 | bh = ufs_bread(inode, blk, 1, &err); |
1467 | if (!bh) |
1468 | goto out; |
1469 | lock_buffer(bh); |
1470 | memcpy(bh->b_data+offset, data, tocopy); |
1471 | flush_dcache_page(bh->b_page); |
1472 | set_buffer_uptodate(bh); |
1473 | mark_buffer_dirty(bh); |
1474 | unlock_buffer(bh); |
1475 | brelse(bh); |
1476 | offset = 0; |
1477 | towrite -= tocopy; |
1478 | data += tocopy; |
1479 | blk++; |
1480 | } |
1481 | out: |
1482 | if (len == towrite) { |
1483 | mutex_unlock(&inode->i_mutex); |
1484 | return err; |
1485 | } |
1486 | if (inode->i_size < off+len-towrite) |
1487 | i_size_write(inode, off+len-towrite); |
1488 | inode->i_version++; |
1489 | inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; |
1490 | mark_inode_dirty(inode); |
1491 | mutex_unlock(&inode->i_mutex); |
1492 | return len - towrite; |
1493 | } |
1494 | |
1495 | #endif |
1496 | |
1497 | static int ufs_get_sb(struct file_system_type *fs_type, |
1498 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1499 | { |
1500 | return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); |
1501 | } |
1502 | |
1503 | static struct file_system_type ufs_fs_type = { |
1504 | .owner = THIS_MODULE, |
1505 | .name = "ufs", |
1506 | .get_sb = ufs_get_sb, |
1507 | .kill_sb = kill_block_super, |
1508 | .fs_flags = FS_REQUIRES_DEV, |
1509 | }; |
1510 | |
1511 | static int __init init_ufs_fs(void) |
1512 | { |
1513 | int err = init_inodecache(); |
1514 | if (err) |
1515 | goto out1; |
1516 | err = register_filesystem(&ufs_fs_type); |
1517 | if (err) |
1518 | goto out; |
1519 | return 0; |
1520 | out: |
1521 | destroy_inodecache(); |
1522 | out1: |
1523 | return err; |
1524 | } |
1525 | |
1526 | static void __exit exit_ufs_fs(void) |
1527 | { |
1528 | unregister_filesystem(&ufs_fs_type); |
1529 | destroy_inodecache(); |
1530 | } |
1531 | |
1532 | module_init(init_ufs_fs) |
1533 | module_exit(exit_ufs_fs) |
1534 | MODULE_LICENSE("GPL"); |
1535 |
Branches:
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9