Commit | Line | Data |
---|---|---|
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 | 220 | */ |
177848a0 | 221 | static u64 |
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; | |
54fb996a ED |
229 | unsigned blockoff, lastblockoff; |
230 | u64 tmp, goal, lastfrag, block, lastblock; | |
231 | void *p, *p2; | |
1da177e4 | 232 | |
54fb996a ED |
233 | UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " |
234 | "metadata %d\n", inode->i_ino, (unsigned long long)fragment, | |
022a6dc5 | 235 | (unsigned long long)new_fragment, required, !phys); |
1da177e4 | 236 | |
1da177e4 LT |
237 | /* TODO : to be done for write support |
238 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
239 | goto ufs2; | |
240 | */ | |
241 | ||
242 | block = ufs_fragstoblks (fragment); | |
243 | blockoff = ufs_fragnum (fragment); | |
54fb996a ED |
244 | p = ufs_get_direct_data_ptr(uspi, ufsi, block); |
245 | ||
1da177e4 LT |
246 | goal = 0; |
247 | ||
54fb996a ED |
248 | tmp = ufs_data_ptr_to_cpu(sb, p); |
249 | ||
1da177e4 | 250 | lastfrag = ufsi->i_lastfrag; |
bbb3eb9d AV |
251 | if (tmp && fragment < lastfrag) |
252 | goto out; | |
1da177e4 LT |
253 | |
254 | lastblock = ufs_fragstoblks (lastfrag); | |
255 | lastblockoff = ufs_fragnum (lastfrag); | |
256 | /* | |
257 | * We will extend file into new block beyond last allocated block | |
258 | */ | |
259 | if (lastblock < block) { | |
260 | /* | |
261 | * We must reallocate last allocated block | |
262 | */ | |
263 | if (lastblockoff) { | |
54fb996a ED |
264 | p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); |
265 | tmp = ufs_new_fragments(inode, p2, lastfrag, | |
266 | ufs_data_ptr_to_cpu(sb, p2), | |
267 | uspi->s_fpb - lastblockoff, | |
268 | err, locked_page); | |
5a39c255 | 269 | if (!tmp) |
177848a0 | 270 | return 0; |
1da177e4 | 271 | lastfrag = ufsi->i_lastfrag; |
1da177e4 | 272 | } |
54fb996a ED |
273 | tmp = ufs_data_ptr_to_cpu(sb, |
274 | ufs_get_direct_data_ptr(uspi, ufsi, | |
275 | lastblock)); | |
c37336b0 ED |
276 | if (tmp) |
277 | goal = tmp + uspi->s_fpb; | |
010d331f | 278 | tmp = ufs_new_fragments (inode, p, fragment - blockoff, |
6ef4d6bf | 279 | goal, required + blockoff, |
a685e26f ED |
280 | err, |
281 | phys != NULL ? locked_page : NULL); | |
54fb996a | 282 | } else if (lastblock == block) { |
1da177e4 LT |
283 | /* |
284 | * We will extend last allocated block | |
285 | */ | |
54fb996a ED |
286 | tmp = ufs_new_fragments(inode, p, fragment - |
287 | (blockoff - lastblockoff), | |
288 | ufs_data_ptr_to_cpu(sb, p), | |
289 | required + (blockoff - lastblockoff), | |
a685e26f | 290 | err, phys != NULL ? locked_page : NULL); |
c37336b0 | 291 | } else /* (lastblock > block) */ { |
1da177e4 LT |
292 | /* |
293 | * We will allocate new block before last allocated block | |
294 | */ | |
c37336b0 | 295 | if (block) { |
54fb996a ED |
296 | tmp = ufs_data_ptr_to_cpu(sb, |
297 | ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); | |
c37336b0 ED |
298 | if (tmp) |
299 | goal = tmp + uspi->s_fpb; | |
300 | } | |
6ef4d6bf | 301 | tmp = ufs_new_fragments(inode, p, fragment - blockoff, |
a685e26f ED |
302 | goal, uspi->s_fpb, err, |
303 | phys != NULL ? locked_page : NULL); | |
1da177e4 LT |
304 | } |
305 | if (!tmp) { | |
1da177e4 | 306 | *err = -ENOSPC; |
177848a0 | 307 | return 0; |
1da177e4 LT |
308 | } |
309 | ||
bbb3eb9d | 310 | if (phys) { |
1da177e4 LT |
311 | *err = 0; |
312 | *new = 1; | |
313 | } | |
1da177e4 LT |
314 | inode->i_ctime = CURRENT_TIME_SEC; |
315 | if (IS_SYNC(inode)) | |
316 | ufs_sync_inode (inode); | |
317 | mark_inode_dirty(inode); | |
bbb3eb9d | 318 | out: |
177848a0 | 319 | return tmp + uspi->s_sbbase; |
1da177e4 LT |
320 | |
321 | /* This part : To be implemented .... | |
322 | Required only for writing, not required for READ-ONLY. | |
323 | ufs2: | |
324 | ||
325 | u2_block = ufs_fragstoblks(fragment); | |
326 | u2_blockoff = ufs_fragnum(fragment); | |
327 | p = ufsi->i_u1.u2_i_data + block; | |
328 | goal = 0; | |
329 | ||
330 | repeat2: | |
331 | tmp = fs32_to_cpu(sb, *p); | |
332 | lastfrag = ufsi->i_lastfrag; | |
333 | ||
334 | */ | |
335 | } | |
336 | ||
022a6dc5 ED |
337 | /** |
338 | * ufs_inode_getblock() - allocate new block | |
edc023ca FF |
339 | * @inode: pointer to inode |
340 | * @bh: pointer to block which hold "pointer" to new allocated block | |
721435a7 | 341 | * @index: number of pointer in the indirect block |
edc023ca | 342 | * @new_fragment: number of new allocated fragment |
022a6dc5 | 343 | * (block will hold this fragment and also uspi->s_fpb-1) |
edc023ca FF |
344 | * @err: see ufs_inode_getfrag() |
345 | * @phys: see ufs_inode_getfrag() | |
346 | * @new: see ufs_inode_getfrag() | |
347 | * @locked_page: see ufs_inode_getfrag() | |
022a6dc5 | 348 | */ |
177848a0 | 349 | static u64 |
022a6dc5 | 350 | ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, |
721435a7 | 351 | unsigned index, sector_t new_fragment, int *err, |
022a6dc5 | 352 | long *phys, int *new, struct page *locked_page) |
1da177e4 | 353 | { |
022a6dc5 ED |
354 | struct super_block *sb = inode->i_sb; |
355 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
721435a7 | 356 | u64 tmp = 0, goal; |
54fb996a | 357 | void *p; |
1da177e4 | 358 | |
1da177e4 LT |
359 | if (!bh) |
360 | goto out; | |
361 | if (!buffer_uptodate(bh)) { | |
362 | ll_rw_block (READ, 1, &bh); | |
363 | wait_on_buffer (bh); | |
364 | if (!buffer_uptodate(bh)) | |
365 | goto out; | |
366 | } | |
54fb996a | 367 | if (uspi->fs_magic == UFS2_MAGIC) |
721435a7 | 368 | p = (__fs64 *)bh->b_data + index; |
54fb996a | 369 | else |
721435a7 | 370 | p = (__fs32 *)bh->b_data + index; |
5a39c255 | 371 | |
54fb996a | 372 | tmp = ufs_data_ptr_to_cpu(sb, p); |
bbb3eb9d | 373 | if (tmp) |
5a39c255 | 374 | goto out; |
1da177e4 | 375 | |
721435a7 AV |
376 | if (index && (uspi->fs_magic == UFS2_MAGIC ? |
377 | (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : | |
378 | (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) | |
1da177e4 LT |
379 | goal = tmp + uspi->s_fpb; |
380 | else | |
381 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
382 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
383 | uspi->s_fpb, err, locked_page); | |
5a39c255 | 384 | if (!tmp) |
1da177e4 | 385 | goto out; |
c9a27b5d | 386 | |
bbb3eb9d | 387 | if (new) |
1da177e4 | 388 | *new = 1; |
1da177e4 LT |
389 | |
390 | mark_buffer_dirty(bh); | |
391 | if (IS_SYNC(inode)) | |
392 | sync_dirty_buffer(bh); | |
393 | inode->i_ctime = CURRENT_TIME_SEC; | |
394 | mark_inode_dirty(inode); | |
395 | out: | |
396 | brelse (bh); | |
abf5d15f | 397 | UFSD("EXIT\n"); |
177848a0 AV |
398 | if (tmp) |
399 | tmp += uspi->s_sbbase; | |
400 | return tmp; | |
1da177e4 LT |
401 | } |
402 | ||
022a6dc5 | 403 | /** |
7422caa5 | 404 | * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
022a6dc5 | 405 | * readpage, writepage and so on |
1da177e4 LT |
406 | */ |
407 | ||
010d331f | 408 | static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 LT |
409 | { |
410 | struct super_block * sb = inode->i_sb; | |
788257d6 AB |
411 | struct ufs_sb_info * sbi = UFS_SB(sb); |
412 | struct ufs_sb_private_info * uspi = sbi->s_uspi; | |
1da177e4 LT |
413 | struct buffer_head * bh; |
414 | int ret, err, new; | |
4b7068c8 AV |
415 | unsigned offsets[4]; |
416 | int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); | |
1da177e4 LT |
417 | unsigned long ptr,phys; |
418 | u64 phys64 = 0; | |
177848a0 | 419 | unsigned frag = fragment & uspi->s_fpbmask; |
721435a7 | 420 | unsigned mask = uspi->s_apbmask >> uspi->s_fpbshift; |
010d331f | 421 | |
1da177e4 | 422 | if (!create) { |
4b7068c8 AV |
423 | phys64 = ufs_frag_map(inode, offsets, depth); |
424 | if (phys64) { | |
177848a0 | 425 | phys64 += frag; |
1da177e4 | 426 | map_bh(bh_result, sb, phys64); |
4b7068c8 | 427 | } |
1da177e4 LT |
428 | return 0; |
429 | } | |
430 | ||
431 | /* This code entered only while writing ....? */ | |
432 | ||
433 | err = -EIO; | |
434 | new = 0; | |
435 | ret = 0; | |
436 | bh = NULL; | |
437 | ||
724bb09f | 438 | mutex_lock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 439 | |
abf5d15f | 440 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
71dd4284 | 441 | if (!depth) |
1da177e4 LT |
442 | goto abort_too_big; |
443 | ||
444 | err = 0; | |
445 | ptr = fragment; | |
010d331f | 446 | |
71dd4284 | 447 | if (depth == 1) { |
177848a0 | 448 | phys64 = ufs_inode_getfrag(inode, ptr, fragment, 1, &err, &phys, |
8d9dcf14 | 449 | &new, bh_result->b_page); |
177848a0 AV |
450 | if (phys64) { |
451 | phys64 += frag; | |
452 | phys = phys64; | |
453 | } | |
1da177e4 LT |
454 | goto out; |
455 | } | |
456 | ptr -= UFS_NDIR_FRAGMENT; | |
71dd4284 | 457 | if (depth == 2) { |
177848a0 | 458 | phys64 = ufs_inode_getfrag(inode, |
8d9dcf14 AV |
459 | UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift), |
460 | fragment, uspi->s_fpb, &err, NULL, NULL, | |
461 | bh_result->b_page); | |
177848a0 AV |
462 | if (phys64) { |
463 | phys64 += (ptr >> uspi->s_apbshift) & uspi->s_fpbmask; | |
464 | bh = sb_getblk(sb, phys64); | |
465 | } else { | |
466 | bh = NULL; | |
467 | } | |
1da177e4 LT |
468 | goto get_indirect; |
469 | } | |
470 | ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); | |
71dd4284 | 471 | if (depth == 3) { |
177848a0 | 472 | phys64 = ufs_inode_getfrag(inode, |
8d9dcf14 AV |
473 | UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift), |
474 | fragment, uspi->s_fpb, &err, NULL, NULL, | |
475 | bh_result->b_page); | |
177848a0 AV |
476 | if (phys64) { |
477 | phys64 += (ptr >> uspi->s_2apbshift) & uspi->s_fpbmask; | |
478 | bh = sb_getblk(sb, phys64); | |
479 | } else { | |
480 | bh = NULL; | |
481 | } | |
1da177e4 LT |
482 | goto get_double; |
483 | } | |
484 | ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); | |
177848a0 | 485 | phys64 = ufs_inode_getfrag(inode, |
8d9dcf14 AV |
486 | UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift), |
487 | fragment, uspi->s_fpb, &err, NULL, NULL, | |
488 | bh_result->b_page); | |
177848a0 AV |
489 | if (phys64) { |
490 | phys64 += (ptr >> uspi->s_3apbshift) & uspi->s_fpbmask; | |
491 | bh = sb_getblk(sb, phys64); | |
492 | } else { | |
493 | bh = NULL; | |
494 | } | |
495 | phys64 = ufs_inode_getblock(inode, bh, | |
721435a7 | 496 | offsets[1] & mask, |
8d9dcf14 | 497 | fragment, &err, NULL, NULL, NULL); |
177848a0 AV |
498 | if (phys64) { |
499 | phys64 += (ptr >> uspi->s_2apbshift) & uspi->s_fpbmask, | |
500 | bh = sb_getblk(sb, phys64); | |
501 | } else { | |
502 | bh = NULL; | |
503 | } | |
1da177e4 | 504 | get_double: |
177848a0 | 505 | phys64 = ufs_inode_getblock(inode, bh, |
721435a7 | 506 | offsets[depth - 2] & mask, |
8d9dcf14 | 507 | fragment, &err, NULL, NULL, NULL); |
177848a0 AV |
508 | if (phys64) { |
509 | phys64 += (ptr >> uspi->s_apbshift) & uspi->s_fpbmask, | |
510 | bh = sb_getblk(sb, phys64); | |
511 | } else { | |
512 | bh = NULL; | |
513 | } | |
1da177e4 | 514 | get_indirect: |
721435a7 AV |
515 | phys64 = ufs_inode_getblock(inode, bh, offsets[depth - 1] & mask, |
516 | fragment, &err, &phys, &new, bh_result->b_page); | |
177848a0 AV |
517 | if (phys64) { |
518 | phys64 += frag; | |
519 | phys = phys64; | |
520 | } | |
1da177e4 LT |
521 | out: |
522 | if (err) | |
523 | goto abort; | |
524 | if (new) | |
525 | set_buffer_new(bh_result); | |
526 | map_bh(bh_result, sb, phys); | |
527 | abort: | |
724bb09f | 528 | mutex_unlock(&UFS_I(inode)->truncate_mutex); |
788257d6 | 529 | |
1da177e4 LT |
530 | return err; |
531 | ||
1da177e4 LT |
532 | abort_too_big: |
533 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
534 | goto abort; | |
535 | } | |
536 | ||
1da177e4 LT |
537 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) |
538 | { | |
539 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
540 | } | |
82b9d1d0 | 541 | |
1da177e4 LT |
542 | static int ufs_readpage(struct file *file, struct page *page) |
543 | { | |
544 | return block_read_full_page(page,ufs_getfrag_block); | |
545 | } | |
82b9d1d0 | 546 | |
f4e420dc | 547 | int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 548 | { |
6e1db88d | 549 | return __block_write_begin(page, pos, len, ufs_getfrag_block); |
1da177e4 | 550 | } |
82b9d1d0 | 551 | |
010d331f AV |
552 | static void ufs_truncate_blocks(struct inode *); |
553 | ||
83f6e371 MS |
554 | static void ufs_write_failed(struct address_space *mapping, loff_t to) |
555 | { | |
556 | struct inode *inode = mapping->host; | |
557 | ||
3b7a3a05 | 558 | if (to > inode->i_size) { |
7caef267 | 559 | truncate_pagecache(inode, inode->i_size); |
3b7a3a05 AV |
560 | ufs_truncate_blocks(inode); |
561 | } | |
83f6e371 MS |
562 | } |
563 | ||
82b9d1d0 NP |
564 | static int ufs_write_begin(struct file *file, struct address_space *mapping, |
565 | loff_t pos, unsigned len, unsigned flags, | |
566 | struct page **pagep, void **fsdata) | |
567 | { | |
155130a4 CH |
568 | int ret; |
569 | ||
570 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 571 | ufs_getfrag_block); |
83f6e371 MS |
572 | if (unlikely(ret)) |
573 | ufs_write_failed(mapping, pos + len); | |
155130a4 CH |
574 | |
575 | return ret; | |
82b9d1d0 NP |
576 | } |
577 | ||
3b7a3a05 AV |
578 | static int ufs_write_end(struct file *file, struct address_space *mapping, |
579 | loff_t pos, unsigned len, unsigned copied, | |
580 | struct page *page, void *fsdata) | |
581 | { | |
582 | int ret; | |
583 | ||
584 | ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); | |
585 | if (ret < len) | |
586 | ufs_write_failed(mapping, pos + len); | |
587 | return ret; | |
588 | } | |
589 | ||
1da177e4 LT |
590 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) |
591 | { | |
592 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
593 | } | |
82b9d1d0 | 594 | |
f5e54d6e | 595 | const struct address_space_operations ufs_aops = { |
1da177e4 LT |
596 | .readpage = ufs_readpage, |
597 | .writepage = ufs_writepage, | |
82b9d1d0 | 598 | .write_begin = ufs_write_begin, |
3b7a3a05 | 599 | .write_end = ufs_write_end, |
1da177e4 LT |
600 | .bmap = ufs_bmap |
601 | }; | |
602 | ||
826843a3 ED |
603 | static void ufs_set_inode_ops(struct inode *inode) |
604 | { | |
605 | if (S_ISREG(inode->i_mode)) { | |
606 | inode->i_op = &ufs_file_inode_operations; | |
607 | inode->i_fop = &ufs_file_operations; | |
608 | inode->i_mapping->a_ops = &ufs_aops; | |
609 | } else if (S_ISDIR(inode->i_mode)) { | |
610 | inode->i_op = &ufs_dir_inode_operations; | |
611 | inode->i_fop = &ufs_dir_operations; | |
612 | inode->i_mapping->a_ops = &ufs_aops; | |
613 | } else if (S_ISLNK(inode->i_mode)) { | |
4b8061a6 | 614 | if (!inode->i_blocks) { |
826843a3 | 615 | inode->i_op = &ufs_fast_symlink_inode_operations; |
4b8061a6 AV |
616 | inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; |
617 | } else { | |
311b9549 | 618 | inode->i_op = &ufs_symlink_inode_operations; |
826843a3 ED |
619 | inode->i_mapping->a_ops = &ufs_aops; |
620 | } | |
621 | } else | |
622 | init_special_inode(inode, inode->i_mode, | |
623 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
624 | } | |
625 | ||
07a0cfec | 626 | static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 LT |
627 | { |
628 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
05f225dc | 629 | struct super_block *sb = inode->i_sb; |
6a9a06d9 | 630 | umode_t mode; |
1da177e4 LT |
631 | |
632 | /* | |
633 | * Copy data to the in-core inode. | |
634 | */ | |
635 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
bfe86848 | 636 | set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); |
07a0cfec | 637 | if (inode->i_nlink == 0) { |
1da177e4 | 638 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
07a0cfec ED |
639 | return -1; |
640 | } | |
010d331f | 641 | |
1da177e4 LT |
642 | /* |
643 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
644 | */ | |
72235465 EB |
645 | i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); |
646 | i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); | |
1da177e4 LT |
647 | |
648 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
649 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); | |
650 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
651 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
652 | inode->i_mtime.tv_nsec = 0; | |
653 | inode->i_atime.tv_nsec = 0; | |
654 | inode->i_ctime.tv_nsec = 0; | |
655 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
3313e292 | 656 | inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); |
1da177e4 | 657 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
1da177e4 LT |
658 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
659 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
05f225dc | 660 | |
010d331f | 661 | |
1da177e4 | 662 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
f33219b7 DG |
663 | memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, |
664 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
dd187a26 | 665 | } else { |
f33219b7 | 666 | memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, |
b12903f1 DG |
667 | sizeof(ufs_inode->ui_u2.ui_symlink) - 1); |
668 | ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 669 | } |
07a0cfec | 670 | return 0; |
05f225dc | 671 | } |
1da177e4 | 672 | |
07a0cfec | 673 | static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
05f225dc ED |
674 | { |
675 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
676 | struct super_block *sb = inode->i_sb; | |
6a9a06d9 | 677 | umode_t mode; |
1da177e4 | 678 | |
abf5d15f | 679 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
680 | /* |
681 | * Copy data to the in-core inode. | |
682 | */ | |
683 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
bfe86848 | 684 | set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); |
07a0cfec | 685 | if (inode->i_nlink == 0) { |
1da177e4 | 686 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
07a0cfec ED |
687 | return -1; |
688 | } | |
1da177e4 LT |
689 | |
690 | /* | |
691 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
692 | */ | |
72235465 EB |
693 | i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); |
694 | i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); | |
1da177e4 LT |
695 | |
696 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
2189850f ED |
697 | inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); |
698 | inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); | |
699 | inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); | |
700 | inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); | |
701 | inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); | |
702 | inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); | |
1da177e4 | 703 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); |
3313e292 | 704 | inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); |
1da177e4 | 705 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
1da177e4 LT |
706 | /* |
707 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
708 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
709 | */ | |
1da177e4 LT |
710 | |
711 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
f33219b7 DG |
712 | memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, |
713 | sizeof(ufs2_inode->ui_u2.ui_addr)); | |
05f225dc | 714 | } else { |
f33219b7 | 715 | memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, |
b12903f1 DG |
716 | sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); |
717 | ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 718 | } |
07a0cfec | 719 | return 0; |
05f225dc ED |
720 | } |
721 | ||
b55c460d | 722 | struct inode *ufs_iget(struct super_block *sb, unsigned long ino) |
05f225dc | 723 | { |
b55c460d DH |
724 | struct ufs_inode_info *ufsi; |
725 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
05f225dc | 726 | struct buffer_head * bh; |
b55c460d | 727 | struct inode *inode; |
07a0cfec | 728 | int err; |
05f225dc | 729 | |
b55c460d | 730 | UFSD("ENTER, ino %lu\n", ino); |
05f225dc | 731 | |
b55c460d | 732 | if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { |
05f225dc | 733 | ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", |
b55c460d DH |
734 | ino); |
735 | return ERR_PTR(-EIO); | |
05f225dc ED |
736 | } |
737 | ||
b55c460d DH |
738 | inode = iget_locked(sb, ino); |
739 | if (!inode) | |
740 | return ERR_PTR(-ENOMEM); | |
741 | if (!(inode->i_state & I_NEW)) | |
742 | return inode; | |
743 | ||
744 | ufsi = UFS_I(inode); | |
745 | ||
05f225dc ED |
746 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); |
747 | if (!bh) { | |
748 | ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", | |
749 | inode->i_ino); | |
750 | goto bad_inode; | |
751 | } | |
752 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
753 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
754 | ||
07a0cfec ED |
755 | err = ufs2_read_inode(inode, |
756 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
757 | } else { |
758 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; | |
759 | ||
07a0cfec ED |
760 | err = ufs1_read_inode(inode, |
761 | ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
762 | } |
763 | ||
07a0cfec ED |
764 | if (err) |
765 | goto bad_inode; | |
05f225dc ED |
766 | inode->i_version++; |
767 | ufsi->i_lastfrag = | |
768 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
769 | ufsi->i_dir_start_lookup = 0; | |
1da177e4 LT |
770 | ufsi->i_osync = 0; |
771 | ||
826843a3 | 772 | ufs_set_inode_ops(inode); |
1da177e4 LT |
773 | |
774 | brelse(bh); | |
775 | ||
abf5d15f | 776 | UFSD("EXIT\n"); |
b55c460d DH |
777 | unlock_new_inode(inode); |
778 | return inode; | |
05f225dc ED |
779 | |
780 | bad_inode: | |
b55c460d DH |
781 | iget_failed(inode); |
782 | return ERR_PTR(-EIO); | |
1da177e4 LT |
783 | } |
784 | ||
3313e292 | 785 | static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 | 786 | { |
3313e292 ED |
787 | struct super_block *sb = inode->i_sb; |
788 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1da177e4 LT |
789 | |
790 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
791 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
792 | ||
72235465 EB |
793 | ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); |
794 | ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); | |
010d331f | 795 | |
1da177e4 LT |
796 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); |
797 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
798 | ufs_inode->ui_atime.tv_usec = 0; | |
799 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
800 | ufs_inode->ui_ctime.tv_usec = 0; | |
801 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
802 | ufs_inode->ui_mtime.tv_usec = 0; | |
803 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
804 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
3313e292 | 805 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
1da177e4 | 806 | |
3313e292 | 807 | if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
1da177e4 LT |
808 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); |
809 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
810 | } | |
811 | ||
812 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
813 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
814 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
815 | } else if (inode->i_blocks) { | |
f33219b7 DG |
816 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, |
817 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
1da177e4 LT |
818 | } |
819 | else { | |
f33219b7 DG |
820 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
821 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
1da177e4 LT |
822 | } |
823 | ||
824 | if (!inode->i_nlink) | |
825 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
3313e292 ED |
826 | } |
827 | ||
828 | static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) | |
829 | { | |
830 | struct super_block *sb = inode->i_sb; | |
831 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
3313e292 ED |
832 | |
833 | UFSD("ENTER\n"); | |
834 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
835 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
836 | ||
72235465 EB |
837 | ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); |
838 | ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); | |
3313e292 ED |
839 | |
840 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
2189850f ED |
841 | ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); |
842 | ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); | |
843 | ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); | |
844 | ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); | |
845 | ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); | |
846 | ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); | |
3313e292 ED |
847 | |
848 | ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); | |
849 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
850 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); | |
851 | ||
852 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
853 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
854 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; | |
855 | } else if (inode->i_blocks) { | |
f33219b7 DG |
856 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, |
857 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
3313e292 | 858 | } else { |
f33219b7 DG |
859 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
860 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
3313e292 ED |
861 | } |
862 | ||
863 | if (!inode->i_nlink) | |
864 | memset (ufs_inode, 0, sizeof(struct ufs2_inode)); | |
865 | UFSD("EXIT\n"); | |
866 | } | |
867 | ||
868 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
869 | { | |
870 | struct super_block *sb = inode->i_sb; | |
871 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
872 | struct buffer_head * bh; | |
873 | ||
874 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
875 | ||
876 | if (inode->i_ino < UFS_ROOTINO || | |
877 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
878 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
879 | return -1; | |
880 | } | |
881 | ||
882 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
883 | if (!bh) { | |
884 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
885 | return -1; | |
886 | } | |
887 | if (uspi->fs_magic == UFS2_MAGIC) { | |
888 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
889 | ||
890 | ufs2_update_inode(inode, | |
891 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
892 | } else { | |
893 | struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; | |
894 | ||
895 | ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
896 | } | |
010d331f | 897 | |
1da177e4 LT |
898 | mark_buffer_dirty(bh); |
899 | if (do_sync) | |
900 | sync_dirty_buffer(bh); | |
901 | brelse (bh); | |
010d331f | 902 | |
abf5d15f | 903 | UFSD("EXIT\n"); |
1da177e4 LT |
904 | return 0; |
905 | } | |
906 | ||
a9185b41 | 907 | int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 908 | { |
f3e0f3da | 909 | return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
910 | } |
911 | ||
912 | int ufs_sync_inode (struct inode *inode) | |
913 | { | |
914 | return ufs_update_inode (inode, 1); | |
915 | } | |
916 | ||
58e8268c | 917 | void ufs_evict_inode(struct inode * inode) |
1da177e4 | 918 | { |
58e8268c AV |
919 | int want_delete = 0; |
920 | ||
921 | if (!inode->i_nlink && !is_bad_inode(inode)) | |
922 | want_delete = 1; | |
10e5dce0 | 923 | |
91b0abe3 | 924 | truncate_inode_pages_final(&inode->i_data); |
58e8268c | 925 | if (want_delete) { |
58e8268c | 926 | inode->i_size = 0; |
d622f167 AV |
927 | if (inode->i_blocks) |
928 | ufs_truncate_blocks(inode); | |
58e8268c AV |
929 | } |
930 | ||
931 | invalidate_inode_buffers(inode); | |
dbd5768f | 932 | clear_inode(inode); |
58e8268c | 933 | |
f3e0f3da | 934 | if (want_delete) |
9ef7db7f | 935 | ufs_free_inode(inode); |
1da177e4 | 936 | } |
010d331f | 937 | |
a138b4b6 AV |
938 | struct to_free { |
939 | struct inode *inode; | |
940 | u64 to; | |
941 | unsigned count; | |
942 | }; | |
943 | ||
944 | static inline void free_data(struct to_free *ctx, u64 from, unsigned count) | |
945 | { | |
946 | if (ctx->count && ctx->to != from) { | |
947 | ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); | |
948 | ctx->count = 0; | |
949 | } | |
950 | ctx->count += count; | |
951 | ctx->to = from + count; | |
952 | } | |
953 | ||
010d331f AV |
954 | #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) |
955 | #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) | |
956 | ||
957 | static void ufs_trunc_direct(struct inode *inode) | |
958 | { | |
959 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
960 | struct super_block * sb; | |
961 | struct ufs_sb_private_info * uspi; | |
962 | void *p; | |
963 | u64 frag1, frag2, frag3, frag4, block1, block2; | |
a138b4b6 | 964 | struct to_free ctx = {.inode = inode}; |
010d331f AV |
965 | unsigned i, tmp; |
966 | ||
967 | UFSD("ENTER: ino %lu\n", inode->i_ino); | |
968 | ||
969 | sb = inode->i_sb; | |
970 | uspi = UFS_SB(sb)->s_uspi; | |
971 | ||
010d331f AV |
972 | frag1 = DIRECT_FRAGMENT; |
973 | frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); | |
974 | frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); | |
975 | frag3 = frag4 & ~uspi->s_fpbmask; | |
976 | block1 = block2 = 0; | |
977 | if (frag2 > frag3) { | |
978 | frag2 = frag4; | |
979 | frag3 = frag4 = 0; | |
980 | } else if (frag2 < frag3) { | |
981 | block1 = ufs_fragstoblks (frag2); | |
982 | block2 = ufs_fragstoblks (frag3); | |
983 | } | |
984 | ||
985 | UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," | |
986 | " frag3 %llu, frag4 %llu\n", inode->i_ino, | |
987 | (unsigned long long)frag1, (unsigned long long)frag2, | |
988 | (unsigned long long)block1, (unsigned long long)block2, | |
989 | (unsigned long long)frag3, (unsigned long long)frag4); | |
990 | ||
991 | if (frag1 >= frag2) | |
992 | goto next1; | |
993 | ||
994 | /* | |
995 | * Free first free fragments | |
996 | */ | |
997 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); | |
998 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
999 | if (!tmp ) | |
1000 | ufs_panic (sb, "ufs_trunc_direct", "internal error"); | |
1001 | frag2 -= frag1; | |
1002 | frag1 = ufs_fragnum (frag1); | |
1003 | ||
1004 | ufs_free_fragments(inode, tmp + frag1, frag2); | |
010d331f AV |
1005 | |
1006 | next1: | |
1007 | /* | |
1008 | * Free whole blocks | |
1009 | */ | |
1010 | for (i = block1 ; i < block2; i++) { | |
1011 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); | |
1012 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
1013 | if (!tmp) | |
1014 | continue; | |
1015 | write_seqlock(&ufsi->meta_lock); | |
1016 | ufs_data_ptr_clear(uspi, p); | |
1017 | write_sequnlock(&ufsi->meta_lock); | |
1018 | ||
a138b4b6 | 1019 | free_data(&ctx, tmp, uspi->s_fpb); |
010d331f AV |
1020 | } |
1021 | ||
a138b4b6 | 1022 | free_data(&ctx, 0, 0); |
010d331f AV |
1023 | |
1024 | if (frag3 >= frag4) | |
1025 | goto next3; | |
1026 | ||
1027 | /* | |
1028 | * Free last free fragments | |
1029 | */ | |
1030 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); | |
1031 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
1032 | if (!tmp ) | |
1033 | ufs_panic(sb, "ufs_truncate_direct", "internal error"); | |
1034 | frag4 = ufs_fragnum (frag4); | |
1035 | write_seqlock(&ufsi->meta_lock); | |
1036 | ufs_data_ptr_clear(uspi, p); | |
1037 | write_sequnlock(&ufsi->meta_lock); | |
1038 | ||
1039 | ufs_free_fragments (inode, tmp, frag4); | |
010d331f AV |
1040 | next3: |
1041 | ||
1042 | UFSD("EXIT: ino %lu\n", inode->i_ino); | |
1043 | } | |
1044 | ||
163073db | 1045 | static void free_full_branch(struct inode *inode, u64 ind_block, int depth) |
6d1ebbca AV |
1046 | { |
1047 | struct super_block *sb = inode->i_sb; | |
1048 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
163073db | 1049 | struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); |
6d1ebbca AV |
1050 | unsigned i; |
1051 | ||
163073db | 1052 | if (!ubh) |
6d1ebbca | 1053 | return; |
6d1ebbca AV |
1054 | |
1055 | if (--depth) { | |
163073db AV |
1056 | for (i = 0; i < uspi->s_apb; i++) { |
1057 | void *p = ubh_get_data_ptr(uspi, ubh, i); | |
1058 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 1059 | if (block) |
163073db | 1060 | free_full_branch(inode, block, depth); |
6d1ebbca AV |
1061 | } |
1062 | } else { | |
1063 | struct to_free ctx = {.inode = inode}; | |
1064 | ||
1065 | for (i = 0; i < uspi->s_apb; i++) { | |
163073db AV |
1066 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1067 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 1068 | if (block) |
163073db | 1069 | free_data(&ctx, block, uspi->s_fpb); |
6d1ebbca AV |
1070 | } |
1071 | free_data(&ctx, 0, 0); | |
1072 | } | |
6d1ebbca AV |
1073 | |
1074 | ubh_bforget(ubh); | |
163073db | 1075 | ufs_free_blocks(inode, ind_block, uspi->s_fpb); |
6d1ebbca AV |
1076 | } |
1077 | ||
7b4e4f7f | 1078 | static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) |
010d331f | 1079 | { |
7bad5939 AV |
1080 | struct super_block *sb = inode->i_sb; |
1081 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1082 | unsigned i; |
010d331f | 1083 | |
9e0fbbde | 1084 | if (--depth) { |
7b4e4f7f | 1085 | for (i = from; i < uspi->s_apb ; i++) { |
163073db AV |
1086 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1087 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1088 | if (block) { | |
1089 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1090 | ufs_data_ptr_clear(uspi, p); | |
1091 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1092 | ubh_mark_buffer_dirty(ubh); | |
1093 | free_full_branch(inode, block, depth); | |
1094 | } | |
a9657423 | 1095 | } |
9e0fbbde | 1096 | } else { |
a138b4b6 | 1097 | struct to_free ctx = {.inode = inode}; |
9e0fbbde AV |
1098 | |
1099 | for (i = from; i < uspi->s_apb; i++) { | |
163073db AV |
1100 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1101 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1102 | if (block) { | |
1103 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1104 | ufs_data_ptr_clear(uspi, p); | |
1105 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1106 | ubh_mark_buffer_dirty(ubh); | |
1107 | free_data(&ctx, block, uspi->s_fpb); | |
163073db | 1108 | } |
9e0fbbde | 1109 | } |
a138b4b6 | 1110 | free_data(&ctx, 0, 0); |
010d331f | 1111 | } |
9e0fbbde AV |
1112 | if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) |
1113 | ubh_sync_block(ubh); | |
1114 | ubh_brelse(ubh); | |
010d331f AV |
1115 | } |
1116 | ||
1117 | static int ufs_alloc_lastblock(struct inode *inode, loff_t size) | |
1118 | { | |
1119 | int err = 0; | |
1120 | struct super_block *sb = inode->i_sb; | |
1121 | struct address_space *mapping = inode->i_mapping; | |
1122 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1123 | unsigned i, end; | |
1124 | sector_t lastfrag; | |
1125 | struct page *lastpage; | |
1126 | struct buffer_head *bh; | |
1127 | u64 phys64; | |
1128 | ||
1129 | lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
1130 | ||
1131 | if (!lastfrag) | |
1132 | goto out; | |
1133 | ||
1134 | lastfrag--; | |
1135 | ||
1136 | lastpage = ufs_get_locked_page(mapping, lastfrag >> | |
1137 | (PAGE_CACHE_SHIFT - inode->i_blkbits)); | |
1138 | if (IS_ERR(lastpage)) { | |
1139 | err = -EIO; | |
1140 | goto out; | |
1141 | } | |
1142 | ||
1143 | end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); | |
1144 | bh = page_buffers(lastpage); | |
1145 | for (i = 0; i < end; ++i) | |
1146 | bh = bh->b_this_page; | |
1147 | ||
1148 | ||
1149 | err = ufs_getfrag_block(inode, lastfrag, bh, 1); | |
1150 | ||
1151 | if (unlikely(err)) | |
1152 | goto out_unlock; | |
1153 | ||
1154 | if (buffer_new(bh)) { | |
1155 | clear_buffer_new(bh); | |
1156 | unmap_underlying_metadata(bh->b_bdev, | |
1157 | bh->b_blocknr); | |
1158 | /* | |
1159 | * we do not zeroize fragment, because of | |
1160 | * if it maped to hole, it already contains zeroes | |
1161 | */ | |
1162 | set_buffer_uptodate(bh); | |
1163 | mark_buffer_dirty(bh); | |
1164 | set_page_dirty(lastpage); | |
1165 | } | |
1166 | ||
1167 | if (lastfrag >= UFS_IND_FRAGMENT) { | |
1168 | end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; | |
1169 | phys64 = bh->b_blocknr + 1; | |
1170 | for (i = 0; i < end; ++i) { | |
1171 | bh = sb_getblk(sb, i + phys64); | |
1172 | lock_buffer(bh); | |
1173 | memset(bh->b_data, 0, sb->s_blocksize); | |
1174 | set_buffer_uptodate(bh); | |
1175 | mark_buffer_dirty(bh); | |
1176 | unlock_buffer(bh); | |
1177 | sync_dirty_buffer(bh); | |
1178 | brelse(bh); | |
1179 | } | |
1180 | } | |
1181 | out_unlock: | |
1182 | ufs_put_locked_page(lastpage); | |
1183 | out: | |
1184 | return err; | |
1185 | } | |
1186 | ||
1187 | static void __ufs_truncate_blocks(struct inode *inode) | |
1188 | { | |
1189 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1190 | struct super_block *sb = inode->i_sb; | |
1191 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1192 | unsigned offsets[4]; |
31cd043e | 1193 | int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); |
6775e24d | 1194 | int depth2; |
42432739 | 1195 | unsigned i; |
7b4e4f7f AV |
1196 | struct ufs_buffer_head *ubh[3]; |
1197 | void *p; | |
1198 | u64 block; | |
6775e24d AV |
1199 | |
1200 | if (!depth) | |
1201 | return; | |
1202 | ||
1203 | /* find the last non-zero in offsets[] */ | |
1204 | for (depth2 = depth - 1; depth2; depth2--) | |
1205 | if (offsets[depth2]) | |
1206 | break; | |
010d331f AV |
1207 | |
1208 | mutex_lock(&ufsi->truncate_mutex); | |
42432739 | 1209 | if (depth == 1) { |
31cd043e | 1210 | ufs_trunc_direct(inode); |
42432739 AV |
1211 | offsets[0] = UFS_IND_BLOCK; |
1212 | } else { | |
7b4e4f7f AV |
1213 | /* get the blocks that should be partially emptied */ |
1214 | p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); | |
1215 | for (i = 0; i < depth2; i++) { | |
1216 | offsets[i]++; /* next branch is fully freed */ | |
1217 | block = ufs_data_ptr_to_cpu(sb, p); | |
1218 | if (!block) | |
1219 | break; | |
1220 | ubh[i] = ubh_bread(sb, block, uspi->s_bsize); | |
1221 | if (!ubh[i]) { | |
1222 | write_seqlock(&ufsi->meta_lock); | |
1223 | ufs_data_ptr_clear(uspi, p); | |
1224 | write_sequnlock(&ufsi->meta_lock); | |
1225 | break; | |
1226 | } | |
1227 | p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); | |
1228 | } | |
f53bd142 | 1229 | while (i--) |
7b4e4f7f | 1230 | free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); |
42432739 AV |
1231 | } |
1232 | for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { | |
163073db AV |
1233 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); |
1234 | block = ufs_data_ptr_to_cpu(sb, p); | |
1235 | if (block) { | |
1236 | write_seqlock(&ufsi->meta_lock); | |
1237 | ufs_data_ptr_clear(uspi, p); | |
1238 | write_sequnlock(&ufsi->meta_lock); | |
1239 | free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); | |
1240 | } | |
31cd043e | 1241 | } |
010d331f | 1242 | ufsi->i_lastfrag = DIRECT_FRAGMENT; |
b6eede0e | 1243 | mark_inode_dirty(inode); |
010d331f AV |
1244 | mutex_unlock(&ufsi->truncate_mutex); |
1245 | } | |
1246 | ||
1247 | static int ufs_truncate(struct inode *inode, loff_t size) | |
1248 | { | |
1249 | int err = 0; | |
1250 | ||
1251 | UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", | |
1252 | inode->i_ino, (unsigned long long)size, | |
1253 | (unsigned long long)i_size_read(inode)); | |
1254 | ||
1255 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1256 | S_ISLNK(inode->i_mode))) | |
1257 | return -EINVAL; | |
1258 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1259 | return -EPERM; | |
1260 | ||
1261 | err = ufs_alloc_lastblock(inode, size); | |
1262 | ||
1263 | if (err) | |
1264 | goto out; | |
1265 | ||
1266 | block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); | |
1267 | ||
1268 | truncate_setsize(inode, size); | |
1269 | ||
1270 | __ufs_truncate_blocks(inode); | |
1271 | inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; | |
1272 | mark_inode_dirty(inode); | |
1273 | out: | |
1274 | UFSD("EXIT: err %d\n", err); | |
1275 | return err; | |
1276 | } | |
1277 | ||
1278 | void ufs_truncate_blocks(struct inode *inode) | |
1279 | { | |
1280 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1281 | S_ISLNK(inode->i_mode))) | |
1282 | return; | |
1283 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1284 | return; | |
1285 | __ufs_truncate_blocks(inode); | |
1286 | } | |
1287 | ||
1288 | int ufs_setattr(struct dentry *dentry, struct iattr *attr) | |
1289 | { | |
1290 | struct inode *inode = d_inode(dentry); | |
1291 | unsigned int ia_valid = attr->ia_valid; | |
1292 | int error; | |
1293 | ||
1294 | error = inode_change_ok(inode, attr); | |
1295 | if (error) | |
1296 | return error; | |
1297 | ||
1298 | if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { | |
1299 | error = ufs_truncate(inode, attr->ia_size); | |
1300 | if (error) | |
1301 | return error; | |
1302 | } | |
1303 | ||
1304 | setattr_copy(inode, attr); | |
1305 | mark_inode_dirty(inode); | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | const struct inode_operations ufs_file_inode_operations = { | |
1310 | .setattr = ufs_setattr, | |
1311 | }; |