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