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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/ufs/inode.c | |
4 | * | |
5 | * Copyright (C) 1998 | |
6 | * Daniel Pirkl <daniel.pirkl@email.cz> | |
7 | * Charles University, Faculty of Mathematics and Physics | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/ext2/inode.c | |
12 | * | |
13 | * Copyright (C) 1992, 1993, 1994, 1995 | |
14 | * Remy Card (card@masi.ibp.fr) | |
15 | * Laboratoire MASI - Institut Blaise Pascal | |
16 | * Universite Pierre et Marie Curie (Paris VI) | |
17 | * | |
18 | * from | |
19 | * | |
20 | * linux/fs/minix/inode.c | |
21 | * | |
22 | * Copyright (C) 1991, 1992 Linus Torvalds | |
23 | * | |
24 | * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 | |
25 | * Big-endian to little-endian byte-swapping/bitmaps by | |
26 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
27 | */ | |
28 | ||
7c0f6ba6 | 29 | #include <linux/uaccess.h> |
1da177e4 LT |
30 | |
31 | #include <linux/errno.h> | |
32 | #include <linux/fs.h> | |
1da177e4 LT |
33 | #include <linux/time.h> |
34 | #include <linux/stat.h> | |
35 | #include <linux/string.h> | |
36 | #include <linux/mm.h> | |
1da177e4 | 37 | #include <linux/buffer_head.h> |
a9185b41 | 38 | #include <linux/writeback.h> |
1da177e4 | 39 | |
e5420598 | 40 | #include "ufs_fs.h" |
bcd6d4ec | 41 | #include "ufs.h" |
1da177e4 LT |
42 | #include "swab.h" |
43 | #include "util.h" | |
44 | ||
4e3911f3 | 45 | static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) |
1da177e4 LT |
46 | { |
47 | struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; | |
48 | int ptrs = uspi->s_apb; | |
49 | int ptrs_bits = uspi->s_apbshift; | |
50 | const long direct_blocks = UFS_NDADDR, | |
51 | indirect_blocks = ptrs, | |
52 | double_blocks = (1 << (ptrs_bits * 2)); | |
53 | int n = 0; | |
54 | ||
55 | ||
abf5d15f | 56 | UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); |
37044c86 | 57 | if (i_block < direct_blocks) { |
1da177e4 LT |
58 | offsets[n++] = i_block; |
59 | } else if ((i_block -= direct_blocks) < indirect_blocks) { | |
60 | offsets[n++] = UFS_IND_BLOCK; | |
61 | offsets[n++] = i_block; | |
62 | } else if ((i_block -= indirect_blocks) < double_blocks) { | |
63 | offsets[n++] = UFS_DIND_BLOCK; | |
64 | offsets[n++] = i_block >> ptrs_bits; | |
65 | offsets[n++] = i_block & (ptrs - 1); | |
66 | } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { | |
67 | offsets[n++] = UFS_TIND_BLOCK; | |
68 | offsets[n++] = i_block >> (ptrs_bits * 2); | |
69 | offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); | |
70 | offsets[n++] = i_block & (ptrs - 1); | |
71 | } else { | |
72 | ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); | |
73 | } | |
74 | return n; | |
75 | } | |
76 | ||
724bb09f AV |
77 | typedef struct { |
78 | void *p; | |
79 | union { | |
80 | __fs32 key32; | |
81 | __fs64 key64; | |
82 | }; | |
83 | struct buffer_head *bh; | |
84 | } Indirect; | |
85 | ||
86 | static inline int grow_chain32(struct ufs_inode_info *ufsi, | |
87 | struct buffer_head *bh, __fs32 *v, | |
88 | Indirect *from, Indirect *to) | |
89 | { | |
90 | Indirect *p; | |
91 | unsigned seq; | |
92 | to->bh = bh; | |
93 | do { | |
94 | seq = read_seqbegin(&ufsi->meta_lock); | |
95 | to->key32 = *(__fs32 *)(to->p = v); | |
96 | for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) | |
97 | ; | |
98 | } while (read_seqretry(&ufsi->meta_lock, seq)); | |
99 | return (p > to); | |
100 | } | |
101 | ||
102 | static inline int grow_chain64(struct ufs_inode_info *ufsi, | |
103 | struct buffer_head *bh, __fs64 *v, | |
104 | Indirect *from, Indirect *to) | |
105 | { | |
106 | Indirect *p; | |
107 | unsigned seq; | |
108 | to->bh = bh; | |
109 | do { | |
110 | seq = read_seqbegin(&ufsi->meta_lock); | |
111 | to->key64 = *(__fs64 *)(to->p = v); | |
112 | for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) | |
113 | ; | |
114 | } while (read_seqretry(&ufsi->meta_lock, seq)); | |
115 | return (p > to); | |
116 | } | |
117 | ||
1da177e4 LT |
118 | /* |
119 | * Returns the location of the fragment from | |
25985edc | 120 | * the beginning of the filesystem. |
1da177e4 LT |
121 | */ |
122 | ||
4b7068c8 | 123 | static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) |
1da177e4 LT |
124 | { |
125 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
126 | struct super_block *sb = inode->i_sb; | |
127 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
128 | u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; | |
129 | int shift = uspi->s_apbshift-uspi->s_fpbshift; | |
724bb09f | 130 | Indirect chain[4], *q = chain; |
4b7068c8 | 131 | unsigned *p; |
1da177e4 | 132 | unsigned flags = UFS_SB(sb)->s_flags; |
724bb09f | 133 | u64 res = 0; |
1da177e4 | 134 | |
7256d819 AM |
135 | UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", |
136 | uspi->s_fpbshift, uspi->s_apbmask, | |
137 | (unsigned long long)mask); | |
1da177e4 LT |
138 | |
139 | if (depth == 0) | |
724bb09f | 140 | goto no_block; |
1da177e4 | 141 | |
724bb09f | 142 | again: |
1da177e4 LT |
143 | p = offsets; |
144 | ||
1da177e4 LT |
145 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
146 | goto ufs2; | |
147 | ||
724bb09f AV |
148 | if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) |
149 | goto changed; | |
150 | if (!q->key32) | |
151 | goto no_block; | |
1da177e4 | 152 | while (--depth) { |
724bb09f | 153 | __fs32 *ptr; |
1da177e4 | 154 | struct buffer_head *bh; |
4e3911f3 | 155 | unsigned n = *p++; |
1da177e4 | 156 | |
724bb09f AV |
157 | bh = sb_bread(sb, uspi->s_sbbase + |
158 | fs32_to_cpu(sb, q->key32) + (n>>shift)); | |
1da177e4 | 159 | if (!bh) |
724bb09f AV |
160 | goto no_block; |
161 | ptr = (__fs32 *)bh->b_data + (n & mask); | |
162 | if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) | |
163 | goto changed; | |
164 | if (!q->key32) | |
165 | goto no_block; | |
1da177e4 | 166 | } |
724bb09f AV |
167 | res = fs32_to_cpu(sb, q->key32); |
168 | goto found; | |
1da177e4 | 169 | |
724bb09f AV |
170 | ufs2: |
171 | if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) | |
172 | goto changed; | |
173 | if (!q->key64) | |
174 | goto no_block; | |
1da177e4 LT |
175 | |
176 | while (--depth) { | |
724bb09f | 177 | __fs64 *ptr; |
1da177e4 | 178 | struct buffer_head *bh; |
4e3911f3 | 179 | unsigned n = *p++; |
1da177e4 | 180 | |
724bb09f AV |
181 | bh = sb_bread(sb, uspi->s_sbbase + |
182 | fs64_to_cpu(sb, q->key64) + (n>>shift)); | |
1da177e4 | 183 | if (!bh) |
724bb09f AV |
184 | goto no_block; |
185 | ptr = (__fs64 *)bh->b_data + (n & mask); | |
186 | if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) | |
187 | goto changed; | |
188 | if (!q->key64) | |
189 | goto no_block; | |
190 | } | |
191 | res = fs64_to_cpu(sb, q->key64); | |
192 | found: | |
4b7068c8 | 193 | res += uspi->s_sbbase; |
724bb09f AV |
194 | no_block: |
195 | while (q > chain) { | |
196 | brelse(q->bh); | |
197 | q--; | |
1da177e4 | 198 | } |
724bb09f | 199 | return res; |
1da177e4 | 200 | |
724bb09f AV |
201 | changed: |
202 | while (q > chain) { | |
203 | brelse(q->bh); | |
204 | q--; | |
205 | } | |
206 | goto again; | |
1da177e4 LT |
207 | } |
208 | ||
0f3c1294 AV |
209 | /* |
210 | * Unpacking tails: we have a file with partial final block and | |
211 | * we had been asked to extend it. If the fragment being written | |
212 | * is within the same block, we need to extend the tail just to cover | |
213 | * that fragment. Otherwise the tail is extended to full block. | |
214 | * | |
215 | * Note that we might need to create a _new_ tail, but that will | |
216 | * be handled elsewhere; this is strictly for resizing old | |
217 | * ones. | |
218 | */ | |
219 | static bool | |
220 | ufs_extend_tail(struct inode *inode, u64 writes_to, | |
221 | int *err, struct page *locked_page) | |
222 | { | |
223 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
224 | struct super_block *sb = inode->i_sb; | |
225 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
226 | unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */ | |
227 | unsigned block = ufs_fragstoblks(lastfrag); | |
228 | unsigned new_size; | |
229 | void *p; | |
230 | u64 tmp; | |
231 | ||
232 | if (writes_to < (lastfrag | uspi->s_fpbmask)) | |
233 | new_size = (writes_to & uspi->s_fpbmask) + 1; | |
234 | else | |
235 | new_size = uspi->s_fpb; | |
236 | ||
237 | p = ufs_get_direct_data_ptr(uspi, ufsi, block); | |
238 | tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p), | |
940ef1a0 AV |
239 | new_size - (lastfrag & uspi->s_fpbmask), err, |
240 | locked_page); | |
0f3c1294 AV |
241 | return tmp != 0; |
242 | } | |
243 | ||
022a6dc5 ED |
244 | /** |
245 | * ufs_inode_getfrag() - allocate new fragment(s) | |
edc023ca | 246 | * @inode: pointer to inode |
5336970b | 247 | * @index: number of block pointer within the inode's array. |
edc023ca | 248 | * @new_fragment: number of new allocated fragment(s) |
edc023ca | 249 | * @err: we set it if something wrong |
edc023ca FF |
250 | * @new: we set it if we allocate new block |
251 | * @locked_page: for ufs_new_fragments() | |
022a6dc5 | 252 | */ |
177848a0 | 253 | static u64 |
5336970b AV |
254 | ufs_inode_getfrag(struct inode *inode, unsigned index, |
255 | sector_t new_fragment, int *err, | |
4e317ce7 | 256 | int *new, struct page *locked_page) |
1da177e4 LT |
257 | { |
258 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
022a6dc5 ED |
259 | struct super_block *sb = inode->i_sb; |
260 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
5336970b | 261 | u64 tmp, goal, lastfrag; |
0f3c1294 AV |
262 | unsigned nfrags = uspi->s_fpb; |
263 | void *p; | |
1da177e4 | 264 | |
1da177e4 LT |
265 | /* TODO : to be done for write support |
266 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
267 | goto ufs2; | |
268 | */ | |
269 | ||
5336970b | 270 | p = ufs_get_direct_data_ptr(uspi, ufsi, index); |
54fb996a | 271 | tmp = ufs_data_ptr_to_cpu(sb, p); |
0f3c1294 AV |
272 | if (tmp) |
273 | goto out; | |
54fb996a | 274 | |
1da177e4 | 275 | lastfrag = ufsi->i_lastfrag; |
1da177e4 | 276 | |
0f3c1294 AV |
277 | /* will that be a new tail? */ |
278 | if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) | |
279 | nfrags = (new_fragment & uspi->s_fpbmask) + 1; | |
280 | ||
281 | goal = 0; | |
5336970b | 282 | if (index) { |
0f3c1294 | 283 | goal = ufs_data_ptr_to_cpu(sb, |
5336970b | 284 | ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); |
0f3c1294 AV |
285 | if (goal) |
286 | goal += uspi->s_fpb; | |
1da177e4 | 287 | } |
5336970b | 288 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), |
8785d84d | 289 | goal, nfrags, err, locked_page); |
0f3c1294 | 290 | |
1da177e4 | 291 | if (!tmp) { |
1da177e4 | 292 | *err = -ENOSPC; |
177848a0 | 293 | return 0; |
1da177e4 LT |
294 | } |
295 | ||
4e317ce7 | 296 | if (new) |
1da177e4 | 297 | *new = 1; |
02027d42 | 298 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
299 | if (IS_SYNC(inode)) |
300 | ufs_sync_inode (inode); | |
301 | mark_inode_dirty(inode); | |
bbb3eb9d | 302 | out: |
177848a0 | 303 | return tmp + uspi->s_sbbase; |
1da177e4 LT |
304 | |
305 | /* This part : To be implemented .... | |
306 | Required only for writing, not required for READ-ONLY. | |
307 | ufs2: | |
308 | ||
309 | u2_block = ufs_fragstoblks(fragment); | |
310 | u2_blockoff = ufs_fragnum(fragment); | |
311 | p = ufsi->i_u1.u2_i_data + block; | |
312 | goal = 0; | |
313 | ||
314 | repeat2: | |
315 | tmp = fs32_to_cpu(sb, *p); | |
316 | lastfrag = ufsi->i_lastfrag; | |
317 | ||
318 | */ | |
319 | } | |
320 | ||
022a6dc5 ED |
321 | /** |
322 | * ufs_inode_getblock() - allocate new block | |
edc023ca | 323 | * @inode: pointer to inode |
619cfac0 AV |
324 | * @ind_block: block number of the indirect block |
325 | * @index: number of pointer within the indirect block | |
edc023ca | 326 | * @new_fragment: number of new allocated fragment |
022a6dc5 | 327 | * (block will hold this fragment and also uspi->s_fpb-1) |
edc023ca | 328 | * @err: see ufs_inode_getfrag() |
edc023ca FF |
329 | * @new: see ufs_inode_getfrag() |
330 | * @locked_page: see ufs_inode_getfrag() | |
022a6dc5 | 331 | */ |
177848a0 | 332 | static u64 |
619cfac0 | 333 | ufs_inode_getblock(struct inode *inode, u64 ind_block, |
721435a7 | 334 | unsigned index, sector_t new_fragment, int *err, |
4e317ce7 | 335 | int *new, struct page *locked_page) |
1da177e4 | 336 | { |
022a6dc5 ED |
337 | struct super_block *sb = inode->i_sb; |
338 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
619cfac0 | 339 | int shift = uspi->s_apbshift - uspi->s_fpbshift; |
721435a7 | 340 | u64 tmp = 0, goal; |
619cfac0 | 341 | struct buffer_head *bh; |
54fb996a | 342 | void *p; |
1da177e4 | 343 | |
619cfac0 AV |
344 | if (!ind_block) |
345 | return 0; | |
346 | ||
347 | bh = sb_bread(sb, ind_block + (index >> shift)); | |
5fbfb238 AV |
348 | if (unlikely(!bh)) { |
349 | *err = -EIO; | |
619cfac0 | 350 | return 0; |
5fbfb238 | 351 | } |
619cfac0 AV |
352 | |
353 | index &= uspi->s_apbmask >> uspi->s_fpbshift; | |
54fb996a | 354 | if (uspi->fs_magic == UFS2_MAGIC) |
721435a7 | 355 | p = (__fs64 *)bh->b_data + index; |
54fb996a | 356 | else |
721435a7 | 357 | p = (__fs32 *)bh->b_data + index; |
5a39c255 | 358 | |
54fb996a | 359 | tmp = ufs_data_ptr_to_cpu(sb, p); |
bbb3eb9d | 360 | if (tmp) |
5a39c255 | 361 | goto out; |
1da177e4 | 362 | |
721435a7 AV |
363 | if (index && (uspi->fs_magic == UFS2_MAGIC ? |
364 | (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : | |
365 | (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) | |
1da177e4 LT |
366 | goal = tmp + uspi->s_fpb; |
367 | else | |
368 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
369 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
370 | uspi->s_fpb, err, locked_page); | |
5a39c255 | 371 | if (!tmp) |
1da177e4 | 372 | goto out; |
c9a27b5d | 373 | |
bbb3eb9d | 374 | if (new) |
1da177e4 | 375 | *new = 1; |
1da177e4 LT |
376 | |
377 | mark_buffer_dirty(bh); | |
378 | if (IS_SYNC(inode)) | |
379 | sync_dirty_buffer(bh); | |
02027d42 | 380 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
381 | mark_inode_dirty(inode); |
382 | out: | |
383 | brelse (bh); | |
abf5d15f | 384 | UFSD("EXIT\n"); |
177848a0 AV |
385 | if (tmp) |
386 | tmp += uspi->s_sbbase; | |
387 | return tmp; | |
1da177e4 LT |
388 | } |
389 | ||
022a6dc5 | 390 | /** |
7422caa5 | 391 | * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
022a6dc5 | 392 | * readpage, writepage and so on |
1da177e4 LT |
393 | */ |
394 | ||
010d331f | 395 | static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 | 396 | { |
0385f1f9 AV |
397 | struct super_block *sb = inode->i_sb; |
398 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
399 | int err = 0, new = 0; | |
4b7068c8 AV |
400 | unsigned offsets[4]; |
401 | int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); | |
1da177e4 | 402 | u64 phys64 = 0; |
177848a0 | 403 | unsigned frag = fragment & uspi->s_fpbmask; |
010d331f | 404 | |
09bf4f5b AV |
405 | phys64 = ufs_frag_map(inode, offsets, depth); |
406 | if (!create) | |
407 | goto done; | |
1da177e4 | 408 | |
09bf4f5b AV |
409 | if (phys64) { |
410 | if (fragment >= UFS_NDIR_FRAGMENT) | |
411 | goto done; | |
412 | read_seqlock_excl(&UFS_I(inode)->meta_lock); | |
413 | if (fragment < UFS_I(inode)->i_lastfrag) { | |
414 | read_sequnlock_excl(&UFS_I(inode)->meta_lock); | |
415 | goto done; | |
416 | } | |
417 | read_sequnlock_excl(&UFS_I(inode)->meta_lock); | |
418 | } | |
1da177e4 LT |
419 | /* This code entered only while writing ....? */ |
420 | ||
724bb09f | 421 | mutex_lock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 422 | |
abf5d15f | 423 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
0385f1f9 AV |
424 | if (unlikely(!depth)) { |
425 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
426 | err = -EIO; | |
427 | goto out; | |
428 | } | |
0f3c1294 AV |
429 | |
430 | if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { | |
431 | unsigned lastfrag = UFS_I(inode)->i_lastfrag; | |
432 | unsigned tailfrags = lastfrag & uspi->s_fpbmask; | |
433 | if (tailfrags && fragment >= lastfrag) { | |
434 | if (!ufs_extend_tail(inode, fragment, | |
435 | &err, bh_result->b_page)) | |
0385f1f9 | 436 | goto out; |
0f3c1294 AV |
437 | } |
438 | } | |
439 | ||
71dd4284 | 440 | if (depth == 1) { |
5336970b | 441 | phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
4e317ce7 | 442 | &err, &new, bh_result->b_page); |
4eeff4c9 AV |
443 | } else { |
444 | int i; | |
5336970b | 445 | phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
4e317ce7 | 446 | &err, NULL, NULL); |
4eeff4c9 AV |
447 | for (i = 1; i < depth - 1; i++) |
448 | phys64 = ufs_inode_getblock(inode, phys64, offsets[i], | |
4e317ce7 | 449 | fragment, &err, NULL, NULL); |
4eeff4c9 | 450 | phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], |
4e317ce7 | 451 | fragment, &err, &new, bh_result->b_page); |
1da177e4 | 452 | } |
0385f1f9 | 453 | out: |
177848a0 AV |
454 | if (phys64) { |
455 | phys64 += frag; | |
0385f1f9 AV |
456 | map_bh(bh_result, sb, phys64); |
457 | if (new) | |
458 | set_buffer_new(bh_result); | |
177848a0 | 459 | } |
724bb09f | 460 | mutex_unlock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 461 | return err; |
09bf4f5b AV |
462 | |
463 | done: | |
464 | if (phys64) | |
465 | map_bh(bh_result, sb, phys64 + frag); | |
466 | return 0; | |
1da177e4 LT |
467 | } |
468 | ||
1da177e4 LT |
469 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) |
470 | { | |
471 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
472 | } | |
82b9d1d0 | 473 | |
1da177e4 LT |
474 | static int ufs_readpage(struct file *file, struct page *page) |
475 | { | |
476 | return block_read_full_page(page,ufs_getfrag_block); | |
477 | } | |
82b9d1d0 | 478 | |
f4e420dc | 479 | int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 480 | { |
6e1db88d | 481 | return __block_write_begin(page, pos, len, ufs_getfrag_block); |
1da177e4 | 482 | } |
82b9d1d0 | 483 | |
010d331f AV |
484 | static void ufs_truncate_blocks(struct inode *); |
485 | ||
83f6e371 MS |
486 | static void ufs_write_failed(struct address_space *mapping, loff_t to) |
487 | { | |
488 | struct inode *inode = mapping->host; | |
489 | ||
3b7a3a05 | 490 | if (to > inode->i_size) { |
7caef267 | 491 | truncate_pagecache(inode, inode->i_size); |
3b7a3a05 AV |
492 | ufs_truncate_blocks(inode); |
493 | } | |
83f6e371 MS |
494 | } |
495 | ||
82b9d1d0 NP |
496 | static int ufs_write_begin(struct file *file, struct address_space *mapping, |
497 | loff_t pos, unsigned len, unsigned flags, | |
498 | struct page **pagep, void **fsdata) | |
499 | { | |
155130a4 CH |
500 | int ret; |
501 | ||
502 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 503 | ufs_getfrag_block); |
83f6e371 MS |
504 | if (unlikely(ret)) |
505 | ufs_write_failed(mapping, pos + len); | |
155130a4 CH |
506 | |
507 | return ret; | |
82b9d1d0 NP |
508 | } |
509 | ||
3b7a3a05 AV |
510 | static int ufs_write_end(struct file *file, struct address_space *mapping, |
511 | loff_t pos, unsigned len, unsigned copied, | |
512 | struct page *page, void *fsdata) | |
513 | { | |
514 | int ret; | |
515 | ||
516 | ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); | |
517 | if (ret < len) | |
518 | ufs_write_failed(mapping, pos + len); | |
519 | return ret; | |
520 | } | |
521 | ||
1da177e4 LT |
522 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) |
523 | { | |
524 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
525 | } | |
82b9d1d0 | 526 | |
f5e54d6e | 527 | const struct address_space_operations ufs_aops = { |
1da177e4 LT |
528 | .readpage = ufs_readpage, |
529 | .writepage = ufs_writepage, | |
82b9d1d0 | 530 | .write_begin = ufs_write_begin, |
3b7a3a05 | 531 | .write_end = ufs_write_end, |
1da177e4 LT |
532 | .bmap = ufs_bmap |
533 | }; | |
534 | ||
826843a3 ED |
535 | static void ufs_set_inode_ops(struct inode *inode) |
536 | { | |
537 | if (S_ISREG(inode->i_mode)) { | |
538 | inode->i_op = &ufs_file_inode_operations; | |
539 | inode->i_fop = &ufs_file_operations; | |
540 | inode->i_mapping->a_ops = &ufs_aops; | |
541 | } else if (S_ISDIR(inode->i_mode)) { | |
542 | inode->i_op = &ufs_dir_inode_operations; | |
543 | inode->i_fop = &ufs_dir_operations; | |
544 | inode->i_mapping->a_ops = &ufs_aops; | |
545 | } else if (S_ISLNK(inode->i_mode)) { | |
4b8061a6 | 546 | if (!inode->i_blocks) { |
4b8061a6 | 547 | inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; |
9cdce3c0 | 548 | inode->i_op = &simple_symlink_inode_operations; |
4b8061a6 | 549 | } else { |
826843a3 | 550 | inode->i_mapping->a_ops = &ufs_aops; |
9cdce3c0 | 551 | inode->i_op = &page_symlink_inode_operations; |
21fc61c7 | 552 | inode_nohighmem(inode); |
826843a3 ED |
553 | } |
554 | } else | |
555 | init_special_inode(inode, inode->i_mode, | |
556 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
557 | } | |
558 | ||
07a0cfec | 559 | static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 LT |
560 | { |
561 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
05f225dc | 562 | struct super_block *sb = inode->i_sb; |
6a9a06d9 | 563 | umode_t mode; |
1da177e4 LT |
564 | |
565 | /* | |
566 | * Copy data to the in-core inode. | |
567 | */ | |
568 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
bfe86848 | 569 | set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); |
c0ef65d2 AV |
570 | if (inode->i_nlink == 0) |
571 | return -ESTALE; | |
010d331f | 572 | |
1da177e4 LT |
573 | /* |
574 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
575 | */ | |
72235465 EB |
576 | i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); |
577 | i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); | |
1da177e4 LT |
578 | |
579 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
23ac7cba AV |
580 | inode->i_atime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); |
581 | inode->i_ctime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
582 | inode->i_mtime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
1da177e4 LT |
583 | inode->i_mtime.tv_nsec = 0; |
584 | inode->i_atime.tv_nsec = 0; | |
585 | inode->i_ctime.tv_nsec = 0; | |
586 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
3313e292 | 587 | inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); |
1da177e4 | 588 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
1da177e4 LT |
589 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
590 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
05f225dc | 591 | |
010d331f | 592 | |
1da177e4 | 593 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
f33219b7 DG |
594 | memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, |
595 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
dd187a26 | 596 | } else { |
f33219b7 | 597 | memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, |
b12903f1 DG |
598 | sizeof(ufs_inode->ui_u2.ui_symlink) - 1); |
599 | ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 600 | } |
07a0cfec | 601 | return 0; |
05f225dc | 602 | } |
1da177e4 | 603 | |
07a0cfec | 604 | static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
05f225dc ED |
605 | { |
606 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
607 | struct super_block *sb = inode->i_sb; | |
6a9a06d9 | 608 | umode_t mode; |
1da177e4 | 609 | |
abf5d15f | 610 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
611 | /* |
612 | * Copy data to the in-core inode. | |
613 | */ | |
614 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
bfe86848 | 615 | set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); |
c0ef65d2 AV |
616 | if (inode->i_nlink == 0) |
617 | return -ESTALE; | |
1da177e4 LT |
618 | |
619 | /* | |
620 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
621 | */ | |
72235465 EB |
622 | i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); |
623 | i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); | |
1da177e4 LT |
624 | |
625 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
2189850f ED |
626 | inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); |
627 | inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); | |
628 | inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); | |
629 | inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); | |
630 | inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); | |
631 | inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); | |
1da177e4 | 632 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); |
3313e292 | 633 | inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); |
1da177e4 | 634 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
1da177e4 LT |
635 | /* |
636 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
637 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
638 | */ | |
1da177e4 LT |
639 | |
640 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
f33219b7 DG |
641 | memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, |
642 | sizeof(ufs2_inode->ui_u2.ui_addr)); | |
05f225dc | 643 | } else { |
f33219b7 | 644 | memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, |
b12903f1 DG |
645 | sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); |
646 | ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 647 | } |
07a0cfec | 648 | return 0; |
05f225dc ED |
649 | } |
650 | ||
b55c460d | 651 | struct inode *ufs_iget(struct super_block *sb, unsigned long ino) |
05f225dc | 652 | { |
b55c460d DH |
653 | struct ufs_inode_info *ufsi; |
654 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
05f225dc | 655 | struct buffer_head * bh; |
b55c460d | 656 | struct inode *inode; |
c0ef65d2 | 657 | int err = -EIO; |
05f225dc | 658 | |
b55c460d | 659 | UFSD("ENTER, ino %lu\n", ino); |
05f225dc | 660 | |
b55c460d | 661 | if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { |
05f225dc | 662 | ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", |
b55c460d DH |
663 | ino); |
664 | return ERR_PTR(-EIO); | |
05f225dc ED |
665 | } |
666 | ||
b55c460d DH |
667 | inode = iget_locked(sb, ino); |
668 | if (!inode) | |
669 | return ERR_PTR(-ENOMEM); | |
670 | if (!(inode->i_state & I_NEW)) | |
671 | return inode; | |
672 | ||
673 | ufsi = UFS_I(inode); | |
674 | ||
05f225dc ED |
675 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); |
676 | if (!bh) { | |
677 | ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", | |
678 | inode->i_ino); | |
679 | goto bad_inode; | |
680 | } | |
681 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
682 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
683 | ||
07a0cfec ED |
684 | err = ufs2_read_inode(inode, |
685 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
686 | } else { |
687 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; | |
688 | ||
07a0cfec ED |
689 | err = ufs1_read_inode(inode, |
690 | ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc | 691 | } |
c0ef65d2 | 692 | brelse(bh); |
07a0cfec ED |
693 | if (err) |
694 | goto bad_inode; | |
c0ef65d2 | 695 | |
05f225dc ED |
696 | inode->i_version++; |
697 | ufsi->i_lastfrag = | |
698 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
699 | ufsi->i_dir_start_lookup = 0; | |
1da177e4 LT |
700 | ufsi->i_osync = 0; |
701 | ||
826843a3 | 702 | ufs_set_inode_ops(inode); |
1da177e4 | 703 | |
abf5d15f | 704 | UFSD("EXIT\n"); |
b55c460d DH |
705 | unlock_new_inode(inode); |
706 | return inode; | |
05f225dc ED |
707 | |
708 | bad_inode: | |
b55c460d | 709 | iget_failed(inode); |
c0ef65d2 | 710 | return ERR_PTR(err); |
1da177e4 LT |
711 | } |
712 | ||
3313e292 | 713 | static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 | 714 | { |
3313e292 ED |
715 | struct super_block *sb = inode->i_sb; |
716 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1da177e4 LT |
717 | |
718 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
719 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
720 | ||
72235465 EB |
721 | ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); |
722 | ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); | |
010d331f | 723 | |
1da177e4 LT |
724 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); |
725 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
726 | ufs_inode->ui_atime.tv_usec = 0; | |
727 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
728 | ufs_inode->ui_ctime.tv_usec = 0; | |
729 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
730 | ufs_inode->ui_mtime.tv_usec = 0; | |
731 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
732 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
3313e292 | 733 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
1da177e4 | 734 | |
3313e292 | 735 | if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
1da177e4 LT |
736 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); |
737 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
738 | } | |
739 | ||
740 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
741 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
742 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
743 | } else if (inode->i_blocks) { | |
f33219b7 DG |
744 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, |
745 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
1da177e4 LT |
746 | } |
747 | else { | |
f33219b7 DG |
748 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
749 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
1da177e4 LT |
750 | } |
751 | ||
752 | if (!inode->i_nlink) | |
753 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
3313e292 ED |
754 | } |
755 | ||
756 | static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) | |
757 | { | |
758 | struct super_block *sb = inode->i_sb; | |
759 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
3313e292 ED |
760 | |
761 | UFSD("ENTER\n"); | |
762 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
763 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
764 | ||
72235465 EB |
765 | ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); |
766 | ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); | |
3313e292 ED |
767 | |
768 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
2189850f ED |
769 | ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); |
770 | ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); | |
771 | ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); | |
772 | ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); | |
773 | ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); | |
774 | ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); | |
3313e292 ED |
775 | |
776 | ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); | |
777 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
778 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); | |
779 | ||
780 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
781 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
782 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; | |
783 | } else if (inode->i_blocks) { | |
f33219b7 DG |
784 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, |
785 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
3313e292 | 786 | } else { |
f33219b7 DG |
787 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
788 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
3313e292 ED |
789 | } |
790 | ||
791 | if (!inode->i_nlink) | |
792 | memset (ufs_inode, 0, sizeof(struct ufs2_inode)); | |
793 | UFSD("EXIT\n"); | |
794 | } | |
795 | ||
796 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
797 | { | |
798 | struct super_block *sb = inode->i_sb; | |
799 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
800 | struct buffer_head * bh; | |
801 | ||
802 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
803 | ||
804 | if (inode->i_ino < UFS_ROOTINO || | |
805 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
806 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
807 | return -1; | |
808 | } | |
809 | ||
810 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
811 | if (!bh) { | |
812 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
813 | return -1; | |
814 | } | |
815 | if (uspi->fs_magic == UFS2_MAGIC) { | |
816 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
817 | ||
818 | ufs2_update_inode(inode, | |
819 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
820 | } else { | |
821 | struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; | |
822 | ||
823 | ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
824 | } | |
010d331f | 825 | |
1da177e4 LT |
826 | mark_buffer_dirty(bh); |
827 | if (do_sync) | |
828 | sync_dirty_buffer(bh); | |
829 | brelse (bh); | |
010d331f | 830 | |
abf5d15f | 831 | UFSD("EXIT\n"); |
1da177e4 LT |
832 | return 0; |
833 | } | |
834 | ||
a9185b41 | 835 | int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 836 | { |
f3e0f3da | 837 | return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
838 | } |
839 | ||
840 | int ufs_sync_inode (struct inode *inode) | |
841 | { | |
842 | return ufs_update_inode (inode, 1); | |
843 | } | |
844 | ||
58e8268c | 845 | void ufs_evict_inode(struct inode * inode) |
1da177e4 | 846 | { |
58e8268c AV |
847 | int want_delete = 0; |
848 | ||
849 | if (!inode->i_nlink && !is_bad_inode(inode)) | |
850 | want_delete = 1; | |
10e5dce0 | 851 | |
91b0abe3 | 852 | truncate_inode_pages_final(&inode->i_data); |
58e8268c | 853 | if (want_delete) { |
58e8268c | 854 | inode->i_size = 0; |
babef37d AV |
855 | if (inode->i_blocks && |
856 | (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
857 | S_ISLNK(inode->i_mode))) | |
d622f167 | 858 | ufs_truncate_blocks(inode); |
67a70017 | 859 | ufs_update_inode(inode, inode_needs_sync(inode)); |
58e8268c AV |
860 | } |
861 | ||
862 | invalidate_inode_buffers(inode); | |
dbd5768f | 863 | clear_inode(inode); |
58e8268c | 864 | |
f3e0f3da | 865 | if (want_delete) |
9ef7db7f | 866 | ufs_free_inode(inode); |
1da177e4 | 867 | } |
010d331f | 868 | |
a138b4b6 AV |
869 | struct to_free { |
870 | struct inode *inode; | |
871 | u64 to; | |
872 | unsigned count; | |
873 | }; | |
874 | ||
875 | static inline void free_data(struct to_free *ctx, u64 from, unsigned count) | |
876 | { | |
877 | if (ctx->count && ctx->to != from) { | |
878 | ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); | |
879 | ctx->count = 0; | |
880 | } | |
881 | ctx->count += count; | |
882 | ctx->to = from + count; | |
883 | } | |
884 | ||
010d331f AV |
885 | #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) |
886 | ||
887 | static void ufs_trunc_direct(struct inode *inode) | |
888 | { | |
889 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
890 | struct super_block * sb; | |
891 | struct ufs_sb_private_info * uspi; | |
892 | void *p; | |
893 | u64 frag1, frag2, frag3, frag4, block1, block2; | |
a138b4b6 | 894 | struct to_free ctx = {.inode = inode}; |
010d331f AV |
895 | unsigned i, tmp; |
896 | ||
897 | UFSD("ENTER: ino %lu\n", inode->i_ino); | |
898 | ||
899 | sb = inode->i_sb; | |
900 | uspi = UFS_SB(sb)->s_uspi; | |
901 | ||
010d331f AV |
902 | frag1 = DIRECT_FRAGMENT; |
903 | frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); | |
904 | frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); | |
905 | frag3 = frag4 & ~uspi->s_fpbmask; | |
906 | block1 = block2 = 0; | |
907 | if (frag2 > frag3) { | |
908 | frag2 = frag4; | |
909 | frag3 = frag4 = 0; | |
910 | } else if (frag2 < frag3) { | |
911 | block1 = ufs_fragstoblks (frag2); | |
912 | block2 = ufs_fragstoblks (frag3); | |
913 | } | |
914 | ||
915 | UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," | |
916 | " frag3 %llu, frag4 %llu\n", inode->i_ino, | |
917 | (unsigned long long)frag1, (unsigned long long)frag2, | |
918 | (unsigned long long)block1, (unsigned long long)block2, | |
919 | (unsigned long long)frag3, (unsigned long long)frag4); | |
920 | ||
921 | if (frag1 >= frag2) | |
922 | goto next1; | |
923 | ||
924 | /* | |
925 | * Free first free fragments | |
926 | */ | |
927 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); | |
928 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
929 | if (!tmp ) | |
930 | ufs_panic (sb, "ufs_trunc_direct", "internal error"); | |
931 | frag2 -= frag1; | |
932 | frag1 = ufs_fragnum (frag1); | |
933 | ||
934 | ufs_free_fragments(inode, tmp + frag1, frag2); | |
010d331f AV |
935 | |
936 | next1: | |
937 | /* | |
938 | * Free whole blocks | |
939 | */ | |
940 | for (i = block1 ; i < block2; i++) { | |
941 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); | |
942 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
943 | if (!tmp) | |
944 | continue; | |
945 | write_seqlock(&ufsi->meta_lock); | |
946 | ufs_data_ptr_clear(uspi, p); | |
947 | write_sequnlock(&ufsi->meta_lock); | |
948 | ||
a138b4b6 | 949 | free_data(&ctx, tmp, uspi->s_fpb); |
010d331f AV |
950 | } |
951 | ||
a138b4b6 | 952 | free_data(&ctx, 0, 0); |
010d331f AV |
953 | |
954 | if (frag3 >= frag4) | |
955 | goto next3; | |
956 | ||
957 | /* | |
958 | * Free last free fragments | |
959 | */ | |
960 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); | |
961 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
962 | if (!tmp ) | |
963 | ufs_panic(sb, "ufs_truncate_direct", "internal error"); | |
964 | frag4 = ufs_fragnum (frag4); | |
965 | write_seqlock(&ufsi->meta_lock); | |
966 | ufs_data_ptr_clear(uspi, p); | |
967 | write_sequnlock(&ufsi->meta_lock); | |
968 | ||
969 | ufs_free_fragments (inode, tmp, frag4); | |
010d331f AV |
970 | next3: |
971 | ||
972 | UFSD("EXIT: ino %lu\n", inode->i_ino); | |
973 | } | |
974 | ||
163073db | 975 | static void free_full_branch(struct inode *inode, u64 ind_block, int depth) |
6d1ebbca AV |
976 | { |
977 | struct super_block *sb = inode->i_sb; | |
978 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
163073db | 979 | struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); |
6d1ebbca AV |
980 | unsigned i; |
981 | ||
163073db | 982 | if (!ubh) |
6d1ebbca | 983 | return; |
6d1ebbca AV |
984 | |
985 | if (--depth) { | |
163073db AV |
986 | for (i = 0; i < uspi->s_apb; i++) { |
987 | void *p = ubh_get_data_ptr(uspi, ubh, i); | |
988 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 989 | if (block) |
163073db | 990 | free_full_branch(inode, block, depth); |
6d1ebbca AV |
991 | } |
992 | } else { | |
993 | struct to_free ctx = {.inode = inode}; | |
994 | ||
995 | for (i = 0; i < uspi->s_apb; i++) { | |
163073db AV |
996 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
997 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 998 | if (block) |
163073db | 999 | free_data(&ctx, block, uspi->s_fpb); |
6d1ebbca AV |
1000 | } |
1001 | free_data(&ctx, 0, 0); | |
1002 | } | |
6d1ebbca AV |
1003 | |
1004 | ubh_bforget(ubh); | |
163073db | 1005 | ufs_free_blocks(inode, ind_block, uspi->s_fpb); |
6d1ebbca AV |
1006 | } |
1007 | ||
7b4e4f7f | 1008 | static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) |
010d331f | 1009 | { |
7bad5939 AV |
1010 | struct super_block *sb = inode->i_sb; |
1011 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1012 | unsigned i; |
010d331f | 1013 | |
9e0fbbde | 1014 | if (--depth) { |
7b4e4f7f | 1015 | for (i = from; i < uspi->s_apb ; i++) { |
163073db AV |
1016 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1017 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1018 | if (block) { | |
1019 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1020 | ufs_data_ptr_clear(uspi, p); | |
1021 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1022 | ubh_mark_buffer_dirty(ubh); | |
1023 | free_full_branch(inode, block, depth); | |
1024 | } | |
a9657423 | 1025 | } |
9e0fbbde | 1026 | } else { |
a138b4b6 | 1027 | struct to_free ctx = {.inode = inode}; |
9e0fbbde AV |
1028 | |
1029 | for (i = from; i < uspi->s_apb; i++) { | |
163073db AV |
1030 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1031 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1032 | if (block) { | |
1033 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1034 | ufs_data_ptr_clear(uspi, p); | |
1035 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1036 | ubh_mark_buffer_dirty(ubh); | |
1037 | free_data(&ctx, block, uspi->s_fpb); | |
163073db | 1038 | } |
9e0fbbde | 1039 | } |
a138b4b6 | 1040 | free_data(&ctx, 0, 0); |
010d331f | 1041 | } |
9e0fbbde AV |
1042 | if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) |
1043 | ubh_sync_block(ubh); | |
1044 | ubh_brelse(ubh); | |
010d331f AV |
1045 | } |
1046 | ||
1047 | static int ufs_alloc_lastblock(struct inode *inode, loff_t size) | |
1048 | { | |
1049 | int err = 0; | |
1050 | struct super_block *sb = inode->i_sb; | |
1051 | struct address_space *mapping = inode->i_mapping; | |
1052 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1053 | unsigned i, end; | |
1054 | sector_t lastfrag; | |
1055 | struct page *lastpage; | |
1056 | struct buffer_head *bh; | |
1057 | u64 phys64; | |
1058 | ||
1059 | lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
1060 | ||
1061 | if (!lastfrag) | |
1062 | goto out; | |
1063 | ||
1064 | lastfrag--; | |
1065 | ||
1066 | lastpage = ufs_get_locked_page(mapping, lastfrag >> | |
09cbfeaf | 1067 | (PAGE_SHIFT - inode->i_blkbits)); |
010d331f AV |
1068 | if (IS_ERR(lastpage)) { |
1069 | err = -EIO; | |
1070 | goto out; | |
1071 | } | |
1072 | ||
09cbfeaf | 1073 | end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); |
010d331f AV |
1074 | bh = page_buffers(lastpage); |
1075 | for (i = 0; i < end; ++i) | |
1076 | bh = bh->b_this_page; | |
1077 | ||
1078 | ||
1079 | err = ufs_getfrag_block(inode, lastfrag, bh, 1); | |
1080 | ||
1081 | if (unlikely(err)) | |
1082 | goto out_unlock; | |
1083 | ||
1084 | if (buffer_new(bh)) { | |
1085 | clear_buffer_new(bh); | |
e64855c6 | 1086 | clean_bdev_bh_alias(bh); |
010d331f AV |
1087 | /* |
1088 | * we do not zeroize fragment, because of | |
1089 | * if it maped to hole, it already contains zeroes | |
1090 | */ | |
1091 | set_buffer_uptodate(bh); | |
1092 | mark_buffer_dirty(bh); | |
1093 | set_page_dirty(lastpage); | |
1094 | } | |
1095 | ||
1096 | if (lastfrag >= UFS_IND_FRAGMENT) { | |
1097 | end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; | |
1098 | phys64 = bh->b_blocknr + 1; | |
1099 | for (i = 0; i < end; ++i) { | |
1100 | bh = sb_getblk(sb, i + phys64); | |
1101 | lock_buffer(bh); | |
1102 | memset(bh->b_data, 0, sb->s_blocksize); | |
1103 | set_buffer_uptodate(bh); | |
1104 | mark_buffer_dirty(bh); | |
1105 | unlock_buffer(bh); | |
1106 | sync_dirty_buffer(bh); | |
1107 | brelse(bh); | |
1108 | } | |
1109 | } | |
1110 | out_unlock: | |
1111 | ufs_put_locked_page(lastpage); | |
1112 | out: | |
1113 | return err; | |
1114 | } | |
1115 | ||
babef37d | 1116 | static void ufs_truncate_blocks(struct inode *inode) |
010d331f AV |
1117 | { |
1118 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1119 | struct super_block *sb = inode->i_sb; | |
1120 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1121 | unsigned offsets[4]; |
a8fad984 | 1122 | int depth; |
6775e24d | 1123 | int depth2; |
42432739 | 1124 | unsigned i; |
7b4e4f7f AV |
1125 | struct ufs_buffer_head *ubh[3]; |
1126 | void *p; | |
1127 | u64 block; | |
6775e24d | 1128 | |
a8fad984 AV |
1129 | if (inode->i_size) { |
1130 | sector_t last = (inode->i_size - 1) >> uspi->s_bshift; | |
1131 | depth = ufs_block_to_path(inode, last, offsets); | |
1132 | if (!depth) | |
1133 | return; | |
1134 | } else { | |
1135 | depth = 1; | |
1136 | } | |
6775e24d | 1137 | |
6775e24d | 1138 | for (depth2 = depth - 1; depth2; depth2--) |
a8fad984 | 1139 | if (offsets[depth2] != uspi->s_apb - 1) |
6775e24d | 1140 | break; |
010d331f AV |
1141 | |
1142 | mutex_lock(&ufsi->truncate_mutex); | |
42432739 | 1143 | if (depth == 1) { |
31cd043e | 1144 | ufs_trunc_direct(inode); |
42432739 AV |
1145 | offsets[0] = UFS_IND_BLOCK; |
1146 | } else { | |
7b4e4f7f | 1147 | /* get the blocks that should be partially emptied */ |
a8fad984 | 1148 | p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++); |
7b4e4f7f | 1149 | for (i = 0; i < depth2; i++) { |
7b4e4f7f AV |
1150 | block = ufs_data_ptr_to_cpu(sb, p); |
1151 | if (!block) | |
1152 | break; | |
1153 | ubh[i] = ubh_bread(sb, block, uspi->s_bsize); | |
1154 | if (!ubh[i]) { | |
1155 | write_seqlock(&ufsi->meta_lock); | |
1156 | ufs_data_ptr_clear(uspi, p); | |
1157 | write_sequnlock(&ufsi->meta_lock); | |
1158 | break; | |
1159 | } | |
a8fad984 | 1160 | p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++); |
7b4e4f7f | 1161 | } |
f53bd142 | 1162 | while (i--) |
7b4e4f7f | 1163 | free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); |
42432739 AV |
1164 | } |
1165 | for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { | |
163073db AV |
1166 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); |
1167 | block = ufs_data_ptr_to_cpu(sb, p); | |
1168 | if (block) { | |
1169 | write_seqlock(&ufsi->meta_lock); | |
1170 | ufs_data_ptr_clear(uspi, p); | |
1171 | write_sequnlock(&ufsi->meta_lock); | |
1172 | free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); | |
1173 | } | |
31cd043e | 1174 | } |
09bf4f5b | 1175 | read_seqlock_excl(&ufsi->meta_lock); |
010d331f | 1176 | ufsi->i_lastfrag = DIRECT_FRAGMENT; |
09bf4f5b | 1177 | read_sequnlock_excl(&ufsi->meta_lock); |
b6eede0e | 1178 | mark_inode_dirty(inode); |
010d331f AV |
1179 | mutex_unlock(&ufsi->truncate_mutex); |
1180 | } | |
1181 | ||
1182 | static int ufs_truncate(struct inode *inode, loff_t size) | |
1183 | { | |
1184 | int err = 0; | |
1185 | ||
1186 | UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", | |
1187 | inode->i_ino, (unsigned long long)size, | |
1188 | (unsigned long long)i_size_read(inode)); | |
1189 | ||
1190 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1191 | S_ISLNK(inode->i_mode))) | |
1192 | return -EINVAL; | |
1193 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1194 | return -EPERM; | |
1195 | ||
1196 | err = ufs_alloc_lastblock(inode, size); | |
1197 | ||
1198 | if (err) | |
1199 | goto out; | |
1200 | ||
1201 | block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); | |
1202 | ||
1203 | truncate_setsize(inode, size); | |
1204 | ||
babef37d | 1205 | ufs_truncate_blocks(inode); |
02027d42 | 1206 | inode->i_mtime = inode->i_ctime = current_time(inode); |
010d331f AV |
1207 | mark_inode_dirty(inode); |
1208 | out: | |
1209 | UFSD("EXIT: err %d\n", err); | |
1210 | return err; | |
1211 | } | |
1212 | ||
010d331f AV |
1213 | int ufs_setattr(struct dentry *dentry, struct iattr *attr) |
1214 | { | |
1215 | struct inode *inode = d_inode(dentry); | |
1216 | unsigned int ia_valid = attr->ia_valid; | |
1217 | int error; | |
1218 | ||
31051c85 | 1219 | error = setattr_prepare(dentry, attr); |
010d331f AV |
1220 | if (error) |
1221 | return error; | |
1222 | ||
1223 | if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { | |
1224 | error = ufs_truncate(inode, attr->ia_size); | |
1225 | if (error) | |
1226 | return error; | |
1227 | } | |
1228 | ||
1229 | setattr_copy(inode, attr); | |
1230 | mark_inode_dirty(inode); | |
1231 | return 0; | |
1232 | } | |
1233 | ||
1234 | const struct inode_operations ufs_file_inode_operations = { | |
1235 | .setattr = ufs_setattr, | |
1236 | }; |