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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/ufs/inode.c | |
3 | * | |
4 | * Copyright (C) 1998 | |
5 | * Daniel Pirkl <daniel.pirkl@email.cz> | |
6 | * Charles University, Faculty of Mathematics and Physics | |
7 | * | |
8 | * from | |
9 | * | |
10 | * linux/fs/ext2/inode.c | |
11 | * | |
12 | * Copyright (C) 1992, 1993, 1994, 1995 | |
13 | * Remy Card (card@masi.ibp.fr) | |
14 | * Laboratoire MASI - Institut Blaise Pascal | |
15 | * Universite Pierre et Marie Curie (Paris VI) | |
16 | * | |
17 | * from | |
18 | * | |
19 | * linux/fs/minix/inode.c | |
20 | * | |
21 | * Copyright (C) 1991, 1992 Linus Torvalds | |
22 | * | |
23 | * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 | |
24 | * Big-endian to little-endian byte-swapping/bitmaps by | |
25 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
26 | */ | |
27 | ||
28 | #include <asm/uaccess.h> | |
1da177e4 LT |
29 | |
30 | #include <linux/errno.h> | |
31 | #include <linux/fs.h> | |
1da177e4 LT |
32 | #include <linux/time.h> |
33 | #include <linux/stat.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/mm.h> | |
1da177e4 | 36 | #include <linux/buffer_head.h> |
a9185b41 | 37 | #include <linux/writeback.h> |
1da177e4 | 38 | |
e5420598 | 39 | #include "ufs_fs.h" |
bcd6d4ec | 40 | #include "ufs.h" |
1da177e4 LT |
41 | #include "swab.h" |
42 | #include "util.h" | |
43 | ||
4e3911f3 | 44 | static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) |
1da177e4 LT |
45 | { |
46 | struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; | |
47 | int ptrs = uspi->s_apb; | |
48 | int ptrs_bits = uspi->s_apbshift; | |
49 | const long direct_blocks = UFS_NDADDR, | |
50 | indirect_blocks = ptrs, | |
51 | double_blocks = (1 << (ptrs_bits * 2)); | |
52 | int n = 0; | |
53 | ||
54 | ||
abf5d15f | 55 | UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); |
37044c86 | 56 | if (i_block < direct_blocks) { |
1da177e4 LT |
57 | offsets[n++] = i_block; |
58 | } else if ((i_block -= direct_blocks) < indirect_blocks) { | |
59 | offsets[n++] = UFS_IND_BLOCK; | |
60 | offsets[n++] = i_block; | |
61 | } else if ((i_block -= indirect_blocks) < double_blocks) { | |
62 | offsets[n++] = UFS_DIND_BLOCK; | |
63 | offsets[n++] = i_block >> ptrs_bits; | |
64 | offsets[n++] = i_block & (ptrs - 1); | |
65 | } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { | |
66 | offsets[n++] = UFS_TIND_BLOCK; | |
67 | offsets[n++] = i_block >> (ptrs_bits * 2); | |
68 | offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); | |
69 | offsets[n++] = i_block & (ptrs - 1); | |
70 | } else { | |
71 | ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); | |
72 | } | |
73 | return n; | |
74 | } | |
75 | ||
724bb09f AV |
76 | typedef struct { |
77 | void *p; | |
78 | union { | |
79 | __fs32 key32; | |
80 | __fs64 key64; | |
81 | }; | |
82 | struct buffer_head *bh; | |
83 | } Indirect; | |
84 | ||
85 | static inline int grow_chain32(struct ufs_inode_info *ufsi, | |
86 | struct buffer_head *bh, __fs32 *v, | |
87 | Indirect *from, Indirect *to) | |
88 | { | |
89 | Indirect *p; | |
90 | unsigned seq; | |
91 | to->bh = bh; | |
92 | do { | |
93 | seq = read_seqbegin(&ufsi->meta_lock); | |
94 | to->key32 = *(__fs32 *)(to->p = v); | |
95 | for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) | |
96 | ; | |
97 | } while (read_seqretry(&ufsi->meta_lock, seq)); | |
98 | return (p > to); | |
99 | } | |
100 | ||
101 | static inline int grow_chain64(struct ufs_inode_info *ufsi, | |
102 | struct buffer_head *bh, __fs64 *v, | |
103 | Indirect *from, Indirect *to) | |
104 | { | |
105 | Indirect *p; | |
106 | unsigned seq; | |
107 | to->bh = bh; | |
108 | do { | |
109 | seq = read_seqbegin(&ufsi->meta_lock); | |
110 | to->key64 = *(__fs64 *)(to->p = v); | |
111 | for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) | |
112 | ; | |
113 | } while (read_seqretry(&ufsi->meta_lock, seq)); | |
114 | return (p > to); | |
115 | } | |
116 | ||
1da177e4 LT |
117 | /* |
118 | * Returns the location of the fragment from | |
25985edc | 119 | * the beginning of the filesystem. |
1da177e4 LT |
120 | */ |
121 | ||
4b7068c8 | 122 | static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) |
1da177e4 LT |
123 | { |
124 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
125 | struct super_block *sb = inode->i_sb; | |
126 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
127 | u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; | |
128 | int shift = uspi->s_apbshift-uspi->s_fpbshift; | |
724bb09f | 129 | Indirect chain[4], *q = chain; |
4b7068c8 | 130 | unsigned *p; |
1da177e4 | 131 | unsigned flags = UFS_SB(sb)->s_flags; |
724bb09f | 132 | u64 res = 0; |
1da177e4 | 133 | |
7256d819 AM |
134 | UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", |
135 | uspi->s_fpbshift, uspi->s_apbmask, | |
136 | (unsigned long long)mask); | |
1da177e4 LT |
137 | |
138 | if (depth == 0) | |
724bb09f | 139 | goto no_block; |
1da177e4 | 140 | |
724bb09f | 141 | again: |
1da177e4 LT |
142 | p = offsets; |
143 | ||
1da177e4 LT |
144 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
145 | goto ufs2; | |
146 | ||
724bb09f AV |
147 | if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) |
148 | goto changed; | |
149 | if (!q->key32) | |
150 | goto no_block; | |
1da177e4 | 151 | while (--depth) { |
724bb09f | 152 | __fs32 *ptr; |
1da177e4 | 153 | struct buffer_head *bh; |
4e3911f3 | 154 | unsigned n = *p++; |
1da177e4 | 155 | |
724bb09f AV |
156 | bh = sb_bread(sb, uspi->s_sbbase + |
157 | fs32_to_cpu(sb, q->key32) + (n>>shift)); | |
1da177e4 | 158 | if (!bh) |
724bb09f AV |
159 | goto no_block; |
160 | ptr = (__fs32 *)bh->b_data + (n & mask); | |
161 | if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) | |
162 | goto changed; | |
163 | if (!q->key32) | |
164 | goto no_block; | |
1da177e4 | 165 | } |
724bb09f AV |
166 | res = fs32_to_cpu(sb, q->key32); |
167 | goto found; | |
1da177e4 | 168 | |
724bb09f AV |
169 | ufs2: |
170 | if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) | |
171 | goto changed; | |
172 | if (!q->key64) | |
173 | goto no_block; | |
1da177e4 LT |
174 | |
175 | while (--depth) { | |
724bb09f | 176 | __fs64 *ptr; |
1da177e4 | 177 | struct buffer_head *bh; |
4e3911f3 | 178 | unsigned n = *p++; |
1da177e4 | 179 | |
724bb09f AV |
180 | bh = sb_bread(sb, uspi->s_sbbase + |
181 | fs64_to_cpu(sb, q->key64) + (n>>shift)); | |
1da177e4 | 182 | if (!bh) |
724bb09f AV |
183 | goto no_block; |
184 | ptr = (__fs64 *)bh->b_data + (n & mask); | |
185 | if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) | |
186 | goto changed; | |
187 | if (!q->key64) | |
188 | goto no_block; | |
189 | } | |
190 | res = fs64_to_cpu(sb, q->key64); | |
191 | found: | |
4b7068c8 | 192 | res += uspi->s_sbbase; |
724bb09f AV |
193 | no_block: |
194 | while (q > chain) { | |
195 | brelse(q->bh); | |
196 | q--; | |
1da177e4 | 197 | } |
724bb09f | 198 | return res; |
1da177e4 | 199 | |
724bb09f AV |
200 | changed: |
201 | while (q > chain) { | |
202 | brelse(q->bh); | |
203 | q--; | |
204 | } | |
205 | goto again; | |
1da177e4 LT |
206 | } |
207 | ||
022a6dc5 ED |
208 | /** |
209 | * ufs_inode_getfrag() - allocate new fragment(s) | |
edc023ca FF |
210 | * @inode: pointer to inode |
211 | * @fragment: number of `fragment' which hold pointer | |
022a6dc5 | 212 | * to new allocated fragment(s) |
edc023ca FF |
213 | * @new_fragment: number of new allocated fragment(s) |
214 | * @required: how many fragment(s) we require | |
215 | * @err: we set it if something wrong | |
216 | * @phys: pointer to where we save physical number of new allocated fragments, | |
022a6dc5 | 217 | * NULL if we allocate not data(indirect blocks for example). |
edc023ca FF |
218 | * @new: we set it if we allocate new block |
219 | * @locked_page: for ufs_new_fragments() | |
022a6dc5 ED |
220 | */ |
221 | static struct buffer_head * | |
54fb996a | 222 | ufs_inode_getfrag(struct inode *inode, u64 fragment, |
022a6dc5 ED |
223 | sector_t new_fragment, unsigned int required, int *err, |
224 | long *phys, int *new, struct page *locked_page) | |
1da177e4 LT |
225 | { |
226 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
022a6dc5 ED |
227 | struct super_block *sb = inode->i_sb; |
228 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1da177e4 | 229 | struct buffer_head * result; |
54fb996a ED |
230 | unsigned blockoff, lastblockoff; |
231 | u64 tmp, goal, lastfrag, block, lastblock; | |
232 | void *p, *p2; | |
1da177e4 | 233 | |
54fb996a ED |
234 | UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " |
235 | "metadata %d\n", inode->i_ino, (unsigned long long)fragment, | |
022a6dc5 | 236 | (unsigned long long)new_fragment, required, !phys); |
1da177e4 | 237 | |
1da177e4 LT |
238 | /* TODO : to be done for write support |
239 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
240 | goto ufs2; | |
241 | */ | |
242 | ||
243 | block = ufs_fragstoblks (fragment); | |
244 | blockoff = ufs_fragnum (fragment); | |
54fb996a ED |
245 | p = ufs_get_direct_data_ptr(uspi, ufsi, block); |
246 | ||
1da177e4 LT |
247 | goal = 0; |
248 | ||
54fb996a ED |
249 | tmp = ufs_data_ptr_to_cpu(sb, p); |
250 | ||
1da177e4 LT |
251 | lastfrag = ufsi->i_lastfrag; |
252 | if (tmp && fragment < lastfrag) { | |
022a6dc5 | 253 | if (!phys) { |
5a39c255 | 254 | return sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
1da177e4 | 255 | } else { |
4b25a37e | 256 | *phys = uspi->s_sbbase + tmp + blockoff; |
1da177e4 LT |
257 | return NULL; |
258 | } | |
259 | } | |
260 | ||
261 | lastblock = ufs_fragstoblks (lastfrag); | |
262 | lastblockoff = ufs_fragnum (lastfrag); | |
263 | /* | |
264 | * We will extend file into new block beyond last allocated block | |
265 | */ | |
266 | if (lastblock < block) { | |
267 | /* | |
268 | * We must reallocate last allocated block | |
269 | */ | |
270 | if (lastblockoff) { | |
54fb996a ED |
271 | p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); |
272 | tmp = ufs_new_fragments(inode, p2, lastfrag, | |
273 | ufs_data_ptr_to_cpu(sb, p2), | |
274 | uspi->s_fpb - lastblockoff, | |
275 | err, locked_page); | |
5a39c255 AV |
276 | if (!tmp) |
277 | return NULL; | |
1da177e4 | 278 | lastfrag = ufsi->i_lastfrag; |
1da177e4 | 279 | } |
54fb996a ED |
280 | tmp = ufs_data_ptr_to_cpu(sb, |
281 | ufs_get_direct_data_ptr(uspi, ufsi, | |
282 | lastblock)); | |
c37336b0 ED |
283 | if (tmp) |
284 | goal = tmp + uspi->s_fpb; | |
010d331f | 285 | tmp = ufs_new_fragments (inode, p, fragment - blockoff, |
6ef4d6bf | 286 | goal, required + blockoff, |
a685e26f ED |
287 | err, |
288 | phys != NULL ? locked_page : NULL); | |
54fb996a | 289 | } else if (lastblock == block) { |
1da177e4 LT |
290 | /* |
291 | * We will extend last allocated block | |
292 | */ | |
54fb996a ED |
293 | tmp = ufs_new_fragments(inode, p, fragment - |
294 | (blockoff - lastblockoff), | |
295 | ufs_data_ptr_to_cpu(sb, p), | |
296 | required + (blockoff - lastblockoff), | |
a685e26f | 297 | err, phys != NULL ? locked_page : NULL); |
c37336b0 | 298 | } else /* (lastblock > block) */ { |
1da177e4 LT |
299 | /* |
300 | * We will allocate new block before last allocated block | |
301 | */ | |
c37336b0 | 302 | if (block) { |
54fb996a ED |
303 | tmp = ufs_data_ptr_to_cpu(sb, |
304 | ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); | |
c37336b0 ED |
305 | if (tmp) |
306 | goal = tmp + uspi->s_fpb; | |
307 | } | |
6ef4d6bf | 308 | tmp = ufs_new_fragments(inode, p, fragment - blockoff, |
a685e26f ED |
309 | goal, uspi->s_fpb, err, |
310 | phys != NULL ? locked_page : NULL); | |
1da177e4 LT |
311 | } |
312 | if (!tmp) { | |
1da177e4 LT |
313 | *err = -ENOSPC; |
314 | return NULL; | |
315 | } | |
316 | ||
022a6dc5 | 317 | if (!phys) { |
4b25a37e | 318 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
1da177e4 | 319 | } else { |
4b25a37e | 320 | *phys = uspi->s_sbbase + tmp + blockoff; |
1da177e4 LT |
321 | result = NULL; |
322 | *err = 0; | |
323 | *new = 1; | |
324 | } | |
325 | ||
326 | inode->i_ctime = CURRENT_TIME_SEC; | |
327 | if (IS_SYNC(inode)) | |
328 | ufs_sync_inode (inode); | |
329 | mark_inode_dirty(inode); | |
1da177e4 LT |
330 | return result; |
331 | ||
332 | /* This part : To be implemented .... | |
333 | Required only for writing, not required for READ-ONLY. | |
334 | ufs2: | |
335 | ||
336 | u2_block = ufs_fragstoblks(fragment); | |
337 | u2_blockoff = ufs_fragnum(fragment); | |
338 | p = ufsi->i_u1.u2_i_data + block; | |
339 | goal = 0; | |
340 | ||
341 | repeat2: | |
342 | tmp = fs32_to_cpu(sb, *p); | |
343 | lastfrag = ufsi->i_lastfrag; | |
344 | ||
345 | */ | |
346 | } | |
347 | ||
022a6dc5 ED |
348 | /** |
349 | * ufs_inode_getblock() - allocate new block | |
edc023ca FF |
350 | * @inode: pointer to inode |
351 | * @bh: pointer to block which hold "pointer" to new allocated block | |
352 | * @fragment: number of `fragment' which hold pointer | |
022a6dc5 | 353 | * to new allocated block |
edc023ca | 354 | * @new_fragment: number of new allocated fragment |
022a6dc5 | 355 | * (block will hold this fragment and also uspi->s_fpb-1) |
edc023ca FF |
356 | * @err: see ufs_inode_getfrag() |
357 | * @phys: see ufs_inode_getfrag() | |
358 | * @new: see ufs_inode_getfrag() | |
359 | * @locked_page: see ufs_inode_getfrag() | |
022a6dc5 ED |
360 | */ |
361 | static struct buffer_head * | |
362 | ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, | |
54fb996a | 363 | u64 fragment, sector_t new_fragment, int *err, |
022a6dc5 | 364 | long *phys, int *new, struct page *locked_page) |
1da177e4 | 365 | { |
022a6dc5 ED |
366 | struct super_block *sb = inode->i_sb; |
367 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1da177e4 | 368 | struct buffer_head * result; |
54fb996a ED |
369 | unsigned blockoff; |
370 | u64 tmp, goal, block; | |
371 | void *p; | |
1da177e4 | 372 | |
1da177e4 LT |
373 | block = ufs_fragstoblks (fragment); |
374 | blockoff = ufs_fragnum (fragment); | |
375 | ||
54fb996a ED |
376 | UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", |
377 | inode->i_ino, (unsigned long long)fragment, | |
378 | (unsigned long long)new_fragment, !phys); | |
1da177e4 LT |
379 | |
380 | result = NULL; | |
381 | if (!bh) | |
382 | goto out; | |
383 | if (!buffer_uptodate(bh)) { | |
384 | ll_rw_block (READ, 1, &bh); | |
385 | wait_on_buffer (bh); | |
386 | if (!buffer_uptodate(bh)) | |
387 | goto out; | |
388 | } | |
54fb996a ED |
389 | if (uspi->fs_magic == UFS2_MAGIC) |
390 | p = (__fs64 *)bh->b_data + block; | |
391 | else | |
392 | p = (__fs32 *)bh->b_data + block; | |
5a39c255 | 393 | |
54fb996a | 394 | tmp = ufs_data_ptr_to_cpu(sb, p); |
1da177e4 | 395 | if (tmp) { |
5a39c255 | 396 | if (!phys) |
1da177e4 | 397 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
5a39c255 | 398 | else |
4b25a37e | 399 | *phys = uspi->s_sbbase + tmp + blockoff; |
5a39c255 | 400 | goto out; |
1da177e4 LT |
401 | } |
402 | ||
54fb996a ED |
403 | if (block && (uspi->fs_magic == UFS2_MAGIC ? |
404 | (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : | |
405 | (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1])))) | |
1da177e4 LT |
406 | goal = tmp + uspi->s_fpb; |
407 | else | |
408 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
409 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
410 | uspi->s_fpb, err, locked_page); | |
5a39c255 | 411 | if (!tmp) |
1da177e4 | 412 | goto out; |
c9a27b5d | 413 | |
022a6dc5 | 414 | if (!phys) { |
4b25a37e | 415 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
1da177e4 | 416 | } else { |
4b25a37e | 417 | *phys = uspi->s_sbbase + tmp + blockoff; |
1da177e4 LT |
418 | *new = 1; |
419 | } | |
420 | ||
421 | mark_buffer_dirty(bh); | |
422 | if (IS_SYNC(inode)) | |
423 | sync_dirty_buffer(bh); | |
424 | inode->i_ctime = CURRENT_TIME_SEC; | |
425 | mark_inode_dirty(inode); | |
426 | out: | |
427 | brelse (bh); | |
abf5d15f | 428 | UFSD("EXIT\n"); |
1da177e4 LT |
429 | return result; |
430 | } | |
431 | ||
022a6dc5 | 432 | /** |
7422caa5 | 433 | * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
022a6dc5 | 434 | * readpage, writepage and so on |
1da177e4 LT |
435 | */ |
436 | ||
010d331f | 437 | static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 LT |
438 | { |
439 | struct super_block * sb = inode->i_sb; | |
788257d6 AB |
440 | struct ufs_sb_info * sbi = UFS_SB(sb); |
441 | struct ufs_sb_private_info * uspi = sbi->s_uspi; | |
1da177e4 LT |
442 | struct buffer_head * bh; |
443 | int ret, err, new; | |
4b7068c8 AV |
444 | unsigned offsets[4]; |
445 | int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); | |
1da177e4 LT |
446 | unsigned long ptr,phys; |
447 | u64 phys64 = 0; | |
010d331f | 448 | |
1da177e4 | 449 | if (!create) { |
4b7068c8 AV |
450 | phys64 = ufs_frag_map(inode, offsets, depth); |
451 | if (phys64) { | |
452 | phys64 += fragment & uspi->s_fpbmask; | |
1da177e4 | 453 | map_bh(bh_result, sb, phys64); |
4b7068c8 | 454 | } |
1da177e4 LT |
455 | return 0; |
456 | } | |
457 | ||
458 | /* This code entered only while writing ....? */ | |
459 | ||
460 | err = -EIO; | |
461 | new = 0; | |
462 | ret = 0; | |
463 | bh = NULL; | |
464 | ||
724bb09f | 465 | mutex_lock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 466 | |
abf5d15f | 467 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
1da177e4 LT |
468 | if (fragment > |
469 | ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) | |
470 | << uspi->s_fpbshift)) | |
471 | goto abort_too_big; | |
472 | ||
473 | err = 0; | |
474 | ptr = fragment; | |
010d331f | 475 | |
1da177e4 LT |
476 | /* |
477 | * ok, these macros clean the logic up a bit and make | |
478 | * it much more readable: | |
479 | */ | |
480 | #define GET_INODE_DATABLOCK(x) \ | |
a685e26f ED |
481 | ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ |
482 | bh_result->b_page) | |
1da177e4 | 483 | #define GET_INODE_PTR(x) \ |
a685e26f ED |
484 | ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ |
485 | bh_result->b_page) | |
1da177e4 | 486 | #define GET_INDIRECT_DATABLOCK(x) \ |
022a6dc5 | 487 | ufs_inode_getblock(inode, bh, x, fragment, \ |
d63b7090 | 488 | &err, &phys, &new, bh_result->b_page) |
1da177e4 | 489 | #define GET_INDIRECT_PTR(x) \ |
022a6dc5 | 490 | ufs_inode_getblock(inode, bh, x, fragment, \ |
d63b7090 | 491 | &err, NULL, NULL, NULL) |
1da177e4 LT |
492 | |
493 | if (ptr < UFS_NDIR_FRAGMENT) { | |
494 | bh = GET_INODE_DATABLOCK(ptr); | |
495 | goto out; | |
496 | } | |
497 | ptr -= UFS_NDIR_FRAGMENT; | |
498 | if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { | |
499 | bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); | |
500 | goto get_indirect; | |
501 | } | |
502 | ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); | |
503 | if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { | |
504 | bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); | |
505 | goto get_double; | |
506 | } | |
507 | ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); | |
508 | bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); | |
509 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); | |
510 | get_double: | |
511 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); | |
512 | get_indirect: | |
513 | bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); | |
514 | ||
515 | #undef GET_INODE_DATABLOCK | |
516 | #undef GET_INODE_PTR | |
517 | #undef GET_INDIRECT_DATABLOCK | |
518 | #undef GET_INDIRECT_PTR | |
519 | ||
520 | out: | |
521 | if (err) | |
522 | goto abort; | |
523 | if (new) | |
524 | set_buffer_new(bh_result); | |
525 | map_bh(bh_result, sb, phys); | |
526 | abort: | |
724bb09f | 527 | mutex_unlock(&UFS_I(inode)->truncate_mutex); |
788257d6 | 528 | |
1da177e4 LT |
529 | return err; |
530 | ||
1da177e4 LT |
531 | abort_too_big: |
532 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
533 | goto abort; | |
534 | } | |
535 | ||
1da177e4 LT |
536 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) |
537 | { | |
538 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
539 | } | |
82b9d1d0 | 540 | |
1da177e4 LT |
541 | static int ufs_readpage(struct file *file, struct page *page) |
542 | { | |
543 | return block_read_full_page(page,ufs_getfrag_block); | |
544 | } | |
82b9d1d0 | 545 | |
f4e420dc | 546 | int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 547 | { |
6e1db88d | 548 | return __block_write_begin(page, pos, len, ufs_getfrag_block); |
1da177e4 | 549 | } |
82b9d1d0 | 550 | |
010d331f AV |
551 | static void ufs_truncate_blocks(struct inode *); |
552 | ||
83f6e371 MS |
553 | static void ufs_write_failed(struct address_space *mapping, loff_t to) |
554 | { | |
555 | struct inode *inode = mapping->host; | |
556 | ||
3b7a3a05 | 557 | if (to > inode->i_size) { |
7caef267 | 558 | truncate_pagecache(inode, inode->i_size); |
3b7a3a05 AV |
559 | ufs_truncate_blocks(inode); |
560 | } | |
83f6e371 MS |
561 | } |
562 | ||
82b9d1d0 NP |
563 | static int ufs_write_begin(struct file *file, struct address_space *mapping, |
564 | loff_t pos, unsigned len, unsigned flags, | |
565 | struct page **pagep, void **fsdata) | |
566 | { | |
155130a4 CH |
567 | int ret; |
568 | ||
569 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 570 | ufs_getfrag_block); |
83f6e371 MS |
571 | if (unlikely(ret)) |
572 | ufs_write_failed(mapping, pos + len); | |
155130a4 CH |
573 | |
574 | return ret; | |
82b9d1d0 NP |
575 | } |
576 | ||
3b7a3a05 AV |
577 | static int ufs_write_end(struct file *file, struct address_space *mapping, |
578 | loff_t pos, unsigned len, unsigned copied, | |
579 | struct page *page, void *fsdata) | |
580 | { | |
581 | int ret; | |
582 | ||
583 | ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); | |
584 | if (ret < len) | |
585 | ufs_write_failed(mapping, pos + len); | |
586 | return ret; | |
587 | } | |
588 | ||
1da177e4 LT |
589 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) |
590 | { | |
591 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
592 | } | |
82b9d1d0 | 593 | |
f5e54d6e | 594 | const struct address_space_operations ufs_aops = { |
1da177e4 LT |
595 | .readpage = ufs_readpage, |
596 | .writepage = ufs_writepage, | |
82b9d1d0 | 597 | .write_begin = ufs_write_begin, |
3b7a3a05 | 598 | .write_end = ufs_write_end, |
1da177e4 LT |
599 | .bmap = ufs_bmap |
600 | }; | |
601 | ||
826843a3 ED |
602 | static void ufs_set_inode_ops(struct inode *inode) |
603 | { | |
604 | if (S_ISREG(inode->i_mode)) { | |
605 | inode->i_op = &ufs_file_inode_operations; | |
606 | inode->i_fop = &ufs_file_operations; | |
607 | inode->i_mapping->a_ops = &ufs_aops; | |
608 | } else if (S_ISDIR(inode->i_mode)) { | |
609 | inode->i_op = &ufs_dir_inode_operations; | |
610 | inode->i_fop = &ufs_dir_operations; | |
611 | inode->i_mapping->a_ops = &ufs_aops; | |
612 | } else if (S_ISLNK(inode->i_mode)) { | |
4b8061a6 | 613 | if (!inode->i_blocks) { |
826843a3 | 614 | inode->i_op = &ufs_fast_symlink_inode_operations; |
4b8061a6 AV |
615 | inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; |
616 | } else { | |
311b9549 | 617 | inode->i_op = &ufs_symlink_inode_operations; |
826843a3 ED |
618 | inode->i_mapping->a_ops = &ufs_aops; |
619 | } | |
620 | } else | |
621 | init_special_inode(inode, inode->i_mode, | |
622 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
623 | } | |
624 | ||
07a0cfec | 625 | static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 LT |
626 | { |
627 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
05f225dc | 628 | struct super_block *sb = inode->i_sb; |
6a9a06d9 | 629 | umode_t mode; |
1da177e4 LT |
630 | |
631 | /* | |
632 | * Copy data to the in-core inode. | |
633 | */ | |
634 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
bfe86848 | 635 | set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); |
07a0cfec | 636 | if (inode->i_nlink == 0) { |
1da177e4 | 637 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
07a0cfec ED |
638 | return -1; |
639 | } | |
010d331f | 640 | |
1da177e4 LT |
641 | /* |
642 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
643 | */ | |
72235465 EB |
644 | i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); |
645 | i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); | |
1da177e4 LT |
646 | |
647 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
648 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); | |
649 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
650 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
651 | inode->i_mtime.tv_nsec = 0; | |
652 | inode->i_atime.tv_nsec = 0; | |
653 | inode->i_ctime.tv_nsec = 0; | |
654 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
3313e292 | 655 | inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); |
1da177e4 | 656 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
1da177e4 LT |
657 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
658 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
05f225dc | 659 | |
010d331f | 660 | |
1da177e4 | 661 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
f33219b7 DG |
662 | memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, |
663 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
dd187a26 | 664 | } else { |
f33219b7 | 665 | memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, |
b12903f1 DG |
666 | sizeof(ufs_inode->ui_u2.ui_symlink) - 1); |
667 | ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 668 | } |
07a0cfec | 669 | return 0; |
05f225dc | 670 | } |
1da177e4 | 671 | |
07a0cfec | 672 | static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
05f225dc ED |
673 | { |
674 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
675 | struct super_block *sb = inode->i_sb; | |
6a9a06d9 | 676 | umode_t mode; |
1da177e4 | 677 | |
abf5d15f | 678 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
679 | /* |
680 | * Copy data to the in-core inode. | |
681 | */ | |
682 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
bfe86848 | 683 | set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); |
07a0cfec | 684 | if (inode->i_nlink == 0) { |
1da177e4 | 685 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
07a0cfec ED |
686 | return -1; |
687 | } | |
1da177e4 LT |
688 | |
689 | /* | |
690 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
691 | */ | |
72235465 EB |
692 | i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); |
693 | i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); | |
1da177e4 LT |
694 | |
695 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
2189850f ED |
696 | inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); |
697 | inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); | |
698 | inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); | |
699 | inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); | |
700 | inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); | |
701 | inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); | |
1da177e4 | 702 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); |
3313e292 | 703 | inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); |
1da177e4 | 704 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
1da177e4 LT |
705 | /* |
706 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
707 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
708 | */ | |
1da177e4 LT |
709 | |
710 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
f33219b7 DG |
711 | memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, |
712 | sizeof(ufs2_inode->ui_u2.ui_addr)); | |
05f225dc | 713 | } else { |
f33219b7 | 714 | memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, |
b12903f1 DG |
715 | sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); |
716 | ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 717 | } |
07a0cfec | 718 | return 0; |
05f225dc ED |
719 | } |
720 | ||
b55c460d | 721 | struct inode *ufs_iget(struct super_block *sb, unsigned long ino) |
05f225dc | 722 | { |
b55c460d DH |
723 | struct ufs_inode_info *ufsi; |
724 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
05f225dc | 725 | struct buffer_head * bh; |
b55c460d | 726 | struct inode *inode; |
07a0cfec | 727 | int err; |
05f225dc | 728 | |
b55c460d | 729 | UFSD("ENTER, ino %lu\n", ino); |
05f225dc | 730 | |
b55c460d | 731 | if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { |
05f225dc | 732 | ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", |
b55c460d DH |
733 | ino); |
734 | return ERR_PTR(-EIO); | |
05f225dc ED |
735 | } |
736 | ||
b55c460d DH |
737 | inode = iget_locked(sb, ino); |
738 | if (!inode) | |
739 | return ERR_PTR(-ENOMEM); | |
740 | if (!(inode->i_state & I_NEW)) | |
741 | return inode; | |
742 | ||
743 | ufsi = UFS_I(inode); | |
744 | ||
05f225dc ED |
745 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); |
746 | if (!bh) { | |
747 | ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", | |
748 | inode->i_ino); | |
749 | goto bad_inode; | |
750 | } | |
751 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
752 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
753 | ||
07a0cfec ED |
754 | err = ufs2_read_inode(inode, |
755 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
756 | } else { |
757 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; | |
758 | ||
07a0cfec ED |
759 | err = ufs1_read_inode(inode, |
760 | ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
761 | } |
762 | ||
07a0cfec ED |
763 | if (err) |
764 | goto bad_inode; | |
05f225dc ED |
765 | inode->i_version++; |
766 | ufsi->i_lastfrag = | |
767 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
768 | ufsi->i_dir_start_lookup = 0; | |
1da177e4 LT |
769 | ufsi->i_osync = 0; |
770 | ||
826843a3 | 771 | ufs_set_inode_ops(inode); |
1da177e4 LT |
772 | |
773 | brelse(bh); | |
774 | ||
abf5d15f | 775 | UFSD("EXIT\n"); |
b55c460d DH |
776 | unlock_new_inode(inode); |
777 | return inode; | |
05f225dc ED |
778 | |
779 | bad_inode: | |
b55c460d DH |
780 | iget_failed(inode); |
781 | return ERR_PTR(-EIO); | |
1da177e4 LT |
782 | } |
783 | ||
3313e292 | 784 | static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 | 785 | { |
3313e292 ED |
786 | struct super_block *sb = inode->i_sb; |
787 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1da177e4 LT |
788 | |
789 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
790 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
791 | ||
72235465 EB |
792 | ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); |
793 | ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); | |
010d331f | 794 | |
1da177e4 LT |
795 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); |
796 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
797 | ufs_inode->ui_atime.tv_usec = 0; | |
798 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
799 | ufs_inode->ui_ctime.tv_usec = 0; | |
800 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
801 | ufs_inode->ui_mtime.tv_usec = 0; | |
802 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
803 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
3313e292 | 804 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
1da177e4 | 805 | |
3313e292 | 806 | if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
1da177e4 LT |
807 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); |
808 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
809 | } | |
810 | ||
811 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
812 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
813 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
814 | } else if (inode->i_blocks) { | |
f33219b7 DG |
815 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, |
816 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
1da177e4 LT |
817 | } |
818 | else { | |
f33219b7 DG |
819 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
820 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
1da177e4 LT |
821 | } |
822 | ||
823 | if (!inode->i_nlink) | |
824 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
3313e292 ED |
825 | } |
826 | ||
827 | static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) | |
828 | { | |
829 | struct super_block *sb = inode->i_sb; | |
830 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
3313e292 ED |
831 | |
832 | UFSD("ENTER\n"); | |
833 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
834 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
835 | ||
72235465 EB |
836 | ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); |
837 | ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); | |
3313e292 ED |
838 | |
839 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
2189850f ED |
840 | ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); |
841 | ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); | |
842 | ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); | |
843 | ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); | |
844 | ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); | |
845 | ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); | |
3313e292 ED |
846 | |
847 | ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); | |
848 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
849 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); | |
850 | ||
851 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
852 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
853 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; | |
854 | } else if (inode->i_blocks) { | |
f33219b7 DG |
855 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, |
856 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
3313e292 | 857 | } else { |
f33219b7 DG |
858 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
859 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
3313e292 ED |
860 | } |
861 | ||
862 | if (!inode->i_nlink) | |
863 | memset (ufs_inode, 0, sizeof(struct ufs2_inode)); | |
864 | UFSD("EXIT\n"); | |
865 | } | |
866 | ||
867 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
868 | { | |
869 | struct super_block *sb = inode->i_sb; | |
870 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
871 | struct buffer_head * bh; | |
872 | ||
873 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
874 | ||
875 | if (inode->i_ino < UFS_ROOTINO || | |
876 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
877 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
878 | return -1; | |
879 | } | |
880 | ||
881 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
882 | if (!bh) { | |
883 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
884 | return -1; | |
885 | } | |
886 | if (uspi->fs_magic == UFS2_MAGIC) { | |
887 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
888 | ||
889 | ufs2_update_inode(inode, | |
890 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
891 | } else { | |
892 | struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; | |
893 | ||
894 | ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
895 | } | |
010d331f | 896 | |
1da177e4 LT |
897 | mark_buffer_dirty(bh); |
898 | if (do_sync) | |
899 | sync_dirty_buffer(bh); | |
900 | brelse (bh); | |
010d331f | 901 | |
abf5d15f | 902 | UFSD("EXIT\n"); |
1da177e4 LT |
903 | return 0; |
904 | } | |
905 | ||
a9185b41 | 906 | int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 907 | { |
f3e0f3da | 908 | return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
909 | } |
910 | ||
911 | int ufs_sync_inode (struct inode *inode) | |
912 | { | |
913 | return ufs_update_inode (inode, 1); | |
914 | } | |
915 | ||
58e8268c | 916 | void ufs_evict_inode(struct inode * inode) |
1da177e4 | 917 | { |
58e8268c AV |
918 | int want_delete = 0; |
919 | ||
920 | if (!inode->i_nlink && !is_bad_inode(inode)) | |
921 | want_delete = 1; | |
10e5dce0 | 922 | |
91b0abe3 | 923 | truncate_inode_pages_final(&inode->i_data); |
58e8268c | 924 | if (want_delete) { |
58e8268c | 925 | inode->i_size = 0; |
d622f167 AV |
926 | if (inode->i_blocks) |
927 | ufs_truncate_blocks(inode); | |
58e8268c AV |
928 | } |
929 | ||
930 | invalidate_inode_buffers(inode); | |
dbd5768f | 931 | clear_inode(inode); |
58e8268c | 932 | |
f3e0f3da | 933 | if (want_delete) |
9ef7db7f | 934 | ufs_free_inode(inode); |
1da177e4 | 935 | } |
010d331f | 936 | |
a138b4b6 AV |
937 | struct to_free { |
938 | struct inode *inode; | |
939 | u64 to; | |
940 | unsigned count; | |
941 | }; | |
942 | ||
943 | static inline void free_data(struct to_free *ctx, u64 from, unsigned count) | |
944 | { | |
945 | if (ctx->count && ctx->to != from) { | |
946 | ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); | |
947 | ctx->count = 0; | |
948 | } | |
949 | ctx->count += count; | |
950 | ctx->to = from + count; | |
951 | } | |
952 | ||
010d331f AV |
953 | #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) |
954 | #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) | |
955 | ||
956 | static void ufs_trunc_direct(struct inode *inode) | |
957 | { | |
958 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
959 | struct super_block * sb; | |
960 | struct ufs_sb_private_info * uspi; | |
961 | void *p; | |
962 | u64 frag1, frag2, frag3, frag4, block1, block2; | |
a138b4b6 | 963 | struct to_free ctx = {.inode = inode}; |
010d331f AV |
964 | unsigned i, tmp; |
965 | ||
966 | UFSD("ENTER: ino %lu\n", inode->i_ino); | |
967 | ||
968 | sb = inode->i_sb; | |
969 | uspi = UFS_SB(sb)->s_uspi; | |
970 | ||
010d331f AV |
971 | frag1 = DIRECT_FRAGMENT; |
972 | frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); | |
973 | frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); | |
974 | frag3 = frag4 & ~uspi->s_fpbmask; | |
975 | block1 = block2 = 0; | |
976 | if (frag2 > frag3) { | |
977 | frag2 = frag4; | |
978 | frag3 = frag4 = 0; | |
979 | } else if (frag2 < frag3) { | |
980 | block1 = ufs_fragstoblks (frag2); | |
981 | block2 = ufs_fragstoblks (frag3); | |
982 | } | |
983 | ||
984 | UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," | |
985 | " frag3 %llu, frag4 %llu\n", inode->i_ino, | |
986 | (unsigned long long)frag1, (unsigned long long)frag2, | |
987 | (unsigned long long)block1, (unsigned long long)block2, | |
988 | (unsigned long long)frag3, (unsigned long long)frag4); | |
989 | ||
990 | if (frag1 >= frag2) | |
991 | goto next1; | |
992 | ||
993 | /* | |
994 | * Free first free fragments | |
995 | */ | |
996 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); | |
997 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
998 | if (!tmp ) | |
999 | ufs_panic (sb, "ufs_trunc_direct", "internal error"); | |
1000 | frag2 -= frag1; | |
1001 | frag1 = ufs_fragnum (frag1); | |
1002 | ||
1003 | ufs_free_fragments(inode, tmp + frag1, frag2); | |
010d331f AV |
1004 | |
1005 | next1: | |
1006 | /* | |
1007 | * Free whole blocks | |
1008 | */ | |
1009 | for (i = block1 ; i < block2; i++) { | |
1010 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); | |
1011 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
1012 | if (!tmp) | |
1013 | continue; | |
1014 | write_seqlock(&ufsi->meta_lock); | |
1015 | ufs_data_ptr_clear(uspi, p); | |
1016 | write_sequnlock(&ufsi->meta_lock); | |
1017 | ||
a138b4b6 | 1018 | free_data(&ctx, tmp, uspi->s_fpb); |
010d331f AV |
1019 | } |
1020 | ||
a138b4b6 | 1021 | free_data(&ctx, 0, 0); |
010d331f AV |
1022 | |
1023 | if (frag3 >= frag4) | |
1024 | goto next3; | |
1025 | ||
1026 | /* | |
1027 | * Free last free fragments | |
1028 | */ | |
1029 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); | |
1030 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
1031 | if (!tmp ) | |
1032 | ufs_panic(sb, "ufs_truncate_direct", "internal error"); | |
1033 | frag4 = ufs_fragnum (frag4); | |
1034 | write_seqlock(&ufsi->meta_lock); | |
1035 | ufs_data_ptr_clear(uspi, p); | |
1036 | write_sequnlock(&ufsi->meta_lock); | |
1037 | ||
1038 | ufs_free_fragments (inode, tmp, frag4); | |
010d331f AV |
1039 | next3: |
1040 | ||
1041 | UFSD("EXIT: ino %lu\n", inode->i_ino); | |
1042 | } | |
1043 | ||
163073db | 1044 | static void free_full_branch(struct inode *inode, u64 ind_block, int depth) |
6d1ebbca AV |
1045 | { |
1046 | struct super_block *sb = inode->i_sb; | |
1047 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
163073db | 1048 | struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); |
6d1ebbca AV |
1049 | unsigned i; |
1050 | ||
163073db | 1051 | if (!ubh) |
6d1ebbca | 1052 | return; |
6d1ebbca AV |
1053 | |
1054 | if (--depth) { | |
163073db AV |
1055 | for (i = 0; i < uspi->s_apb; i++) { |
1056 | void *p = ubh_get_data_ptr(uspi, ubh, i); | |
1057 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 1058 | if (block) |
163073db | 1059 | free_full_branch(inode, block, depth); |
6d1ebbca AV |
1060 | } |
1061 | } else { | |
1062 | struct to_free ctx = {.inode = inode}; | |
1063 | ||
1064 | for (i = 0; i < uspi->s_apb; i++) { | |
163073db AV |
1065 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1066 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 1067 | if (block) |
163073db | 1068 | free_data(&ctx, block, uspi->s_fpb); |
6d1ebbca AV |
1069 | } |
1070 | free_data(&ctx, 0, 0); | |
1071 | } | |
6d1ebbca AV |
1072 | |
1073 | ubh_bforget(ubh); | |
163073db | 1074 | ufs_free_blocks(inode, ind_block, uspi->s_fpb); |
6d1ebbca AV |
1075 | } |
1076 | ||
7b4e4f7f | 1077 | static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) |
010d331f | 1078 | { |
7bad5939 AV |
1079 | struct super_block *sb = inode->i_sb; |
1080 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1081 | unsigned i; |
010d331f | 1082 | |
9e0fbbde | 1083 | if (--depth) { |
7b4e4f7f | 1084 | for (i = from; i < uspi->s_apb ; i++) { |
163073db AV |
1085 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1086 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1087 | if (block) { | |
1088 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1089 | ufs_data_ptr_clear(uspi, p); | |
1090 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1091 | ubh_mark_buffer_dirty(ubh); | |
1092 | free_full_branch(inode, block, depth); | |
1093 | } | |
a9657423 | 1094 | } |
9e0fbbde | 1095 | } else { |
a138b4b6 | 1096 | struct to_free ctx = {.inode = inode}; |
9e0fbbde AV |
1097 | |
1098 | for (i = from; i < uspi->s_apb; i++) { | |
163073db AV |
1099 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1100 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1101 | if (block) { | |
1102 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1103 | ufs_data_ptr_clear(uspi, p); | |
1104 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1105 | ubh_mark_buffer_dirty(ubh); | |
1106 | free_data(&ctx, block, uspi->s_fpb); | |
163073db | 1107 | } |
9e0fbbde | 1108 | } |
a138b4b6 | 1109 | free_data(&ctx, 0, 0); |
010d331f | 1110 | } |
9e0fbbde AV |
1111 | if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) |
1112 | ubh_sync_block(ubh); | |
1113 | ubh_brelse(ubh); | |
010d331f AV |
1114 | } |
1115 | ||
1116 | static int ufs_alloc_lastblock(struct inode *inode, loff_t size) | |
1117 | { | |
1118 | int err = 0; | |
1119 | struct super_block *sb = inode->i_sb; | |
1120 | struct address_space *mapping = inode->i_mapping; | |
1121 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1122 | unsigned i, end; | |
1123 | sector_t lastfrag; | |
1124 | struct page *lastpage; | |
1125 | struct buffer_head *bh; | |
1126 | u64 phys64; | |
1127 | ||
1128 | lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
1129 | ||
1130 | if (!lastfrag) | |
1131 | goto out; | |
1132 | ||
1133 | lastfrag--; | |
1134 | ||
1135 | lastpage = ufs_get_locked_page(mapping, lastfrag >> | |
1136 | (PAGE_CACHE_SHIFT - inode->i_blkbits)); | |
1137 | if (IS_ERR(lastpage)) { | |
1138 | err = -EIO; | |
1139 | goto out; | |
1140 | } | |
1141 | ||
1142 | end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); | |
1143 | bh = page_buffers(lastpage); | |
1144 | for (i = 0; i < end; ++i) | |
1145 | bh = bh->b_this_page; | |
1146 | ||
1147 | ||
1148 | err = ufs_getfrag_block(inode, lastfrag, bh, 1); | |
1149 | ||
1150 | if (unlikely(err)) | |
1151 | goto out_unlock; | |
1152 | ||
1153 | if (buffer_new(bh)) { | |
1154 | clear_buffer_new(bh); | |
1155 | unmap_underlying_metadata(bh->b_bdev, | |
1156 | bh->b_blocknr); | |
1157 | /* | |
1158 | * we do not zeroize fragment, because of | |
1159 | * if it maped to hole, it already contains zeroes | |
1160 | */ | |
1161 | set_buffer_uptodate(bh); | |
1162 | mark_buffer_dirty(bh); | |
1163 | set_page_dirty(lastpage); | |
1164 | } | |
1165 | ||
1166 | if (lastfrag >= UFS_IND_FRAGMENT) { | |
1167 | end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; | |
1168 | phys64 = bh->b_blocknr + 1; | |
1169 | for (i = 0; i < end; ++i) { | |
1170 | bh = sb_getblk(sb, i + phys64); | |
1171 | lock_buffer(bh); | |
1172 | memset(bh->b_data, 0, sb->s_blocksize); | |
1173 | set_buffer_uptodate(bh); | |
1174 | mark_buffer_dirty(bh); | |
1175 | unlock_buffer(bh); | |
1176 | sync_dirty_buffer(bh); | |
1177 | brelse(bh); | |
1178 | } | |
1179 | } | |
1180 | out_unlock: | |
1181 | ufs_put_locked_page(lastpage); | |
1182 | out: | |
1183 | return err; | |
1184 | } | |
1185 | ||
1186 | static void __ufs_truncate_blocks(struct inode *inode) | |
1187 | { | |
1188 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1189 | struct super_block *sb = inode->i_sb; | |
1190 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1191 | unsigned offsets[4]; |
31cd043e | 1192 | int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); |
6775e24d | 1193 | int depth2; |
42432739 | 1194 | unsigned i; |
7b4e4f7f AV |
1195 | struct ufs_buffer_head *ubh[3]; |
1196 | void *p; | |
1197 | u64 block; | |
6775e24d AV |
1198 | |
1199 | if (!depth) | |
1200 | return; | |
1201 | ||
1202 | /* find the last non-zero in offsets[] */ | |
1203 | for (depth2 = depth - 1; depth2; depth2--) | |
1204 | if (offsets[depth2]) | |
1205 | break; | |
010d331f AV |
1206 | |
1207 | mutex_lock(&ufsi->truncate_mutex); | |
42432739 | 1208 | if (depth == 1) { |
31cd043e | 1209 | ufs_trunc_direct(inode); |
42432739 AV |
1210 | offsets[0] = UFS_IND_BLOCK; |
1211 | } else { | |
7b4e4f7f AV |
1212 | /* get the blocks that should be partially emptied */ |
1213 | p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); | |
1214 | for (i = 0; i < depth2; i++) { | |
1215 | offsets[i]++; /* next branch is fully freed */ | |
1216 | block = ufs_data_ptr_to_cpu(sb, p); | |
1217 | if (!block) | |
1218 | break; | |
1219 | ubh[i] = ubh_bread(sb, block, uspi->s_bsize); | |
1220 | if (!ubh[i]) { | |
1221 | write_seqlock(&ufsi->meta_lock); | |
1222 | ufs_data_ptr_clear(uspi, p); | |
1223 | write_sequnlock(&ufsi->meta_lock); | |
1224 | break; | |
1225 | } | |
1226 | p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); | |
1227 | } | |
f53bd142 | 1228 | while (i--) |
7b4e4f7f | 1229 | free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); |
42432739 AV |
1230 | } |
1231 | for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { | |
163073db AV |
1232 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); |
1233 | block = ufs_data_ptr_to_cpu(sb, p); | |
1234 | if (block) { | |
1235 | write_seqlock(&ufsi->meta_lock); | |
1236 | ufs_data_ptr_clear(uspi, p); | |
1237 | write_sequnlock(&ufsi->meta_lock); | |
1238 | free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); | |
1239 | } | |
31cd043e | 1240 | } |
010d331f | 1241 | ufsi->i_lastfrag = DIRECT_FRAGMENT; |
b6eede0e | 1242 | mark_inode_dirty(inode); |
010d331f AV |
1243 | mutex_unlock(&ufsi->truncate_mutex); |
1244 | } | |
1245 | ||
1246 | static int ufs_truncate(struct inode *inode, loff_t size) | |
1247 | { | |
1248 | int err = 0; | |
1249 | ||
1250 | UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", | |
1251 | inode->i_ino, (unsigned long long)size, | |
1252 | (unsigned long long)i_size_read(inode)); | |
1253 | ||
1254 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1255 | S_ISLNK(inode->i_mode))) | |
1256 | return -EINVAL; | |
1257 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1258 | return -EPERM; | |
1259 | ||
1260 | err = ufs_alloc_lastblock(inode, size); | |
1261 | ||
1262 | if (err) | |
1263 | goto out; | |
1264 | ||
1265 | block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); | |
1266 | ||
1267 | truncate_setsize(inode, size); | |
1268 | ||
1269 | __ufs_truncate_blocks(inode); | |
1270 | inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; | |
1271 | mark_inode_dirty(inode); | |
1272 | out: | |
1273 | UFSD("EXIT: err %d\n", err); | |
1274 | return err; | |
1275 | } | |
1276 | ||
1277 | void ufs_truncate_blocks(struct inode *inode) | |
1278 | { | |
1279 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1280 | S_ISLNK(inode->i_mode))) | |
1281 | return; | |
1282 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1283 | return; | |
1284 | __ufs_truncate_blocks(inode); | |
1285 | } | |
1286 | ||
1287 | int ufs_setattr(struct dentry *dentry, struct iattr *attr) | |
1288 | { | |
1289 | struct inode *inode = d_inode(dentry); | |
1290 | unsigned int ia_valid = attr->ia_valid; | |
1291 | int error; | |
1292 | ||
1293 | error = inode_change_ok(inode, attr); | |
1294 | if (error) | |
1295 | return error; | |
1296 | ||
1297 | if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { | |
1298 | error = ufs_truncate(inode, attr->ia_size); | |
1299 | if (error) | |
1300 | return error; | |
1301 | } | |
1302 | ||
1303 | setattr_copy(inode, attr); | |
1304 | mark_inode_dirty(inode); | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | const struct inode_operations ufs_file_inode_operations = { | |
1309 | .setattr = ufs_setattr, | |
1310 | }; |