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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> |
bb8c2d66 | 39 | #include <linux/iversion.h> |
1da177e4 | 40 | |
e5420598 | 41 | #include "ufs_fs.h" |
bcd6d4ec | 42 | #include "ufs.h" |
1da177e4 LT |
43 | #include "swab.h" |
44 | #include "util.h" | |
45 | ||
4e3911f3 | 46 | static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) |
1da177e4 LT |
47 | { |
48 | struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; | |
49 | int ptrs = uspi->s_apb; | |
50 | int ptrs_bits = uspi->s_apbshift; | |
51 | const long direct_blocks = UFS_NDADDR, | |
52 | indirect_blocks = ptrs, | |
53 | double_blocks = (1 << (ptrs_bits * 2)); | |
54 | int n = 0; | |
55 | ||
56 | ||
abf5d15f | 57 | UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); |
37044c86 | 58 | if (i_block < direct_blocks) { |
1da177e4 LT |
59 | offsets[n++] = i_block; |
60 | } else if ((i_block -= direct_blocks) < indirect_blocks) { | |
61 | offsets[n++] = UFS_IND_BLOCK; | |
62 | offsets[n++] = i_block; | |
63 | } else if ((i_block -= indirect_blocks) < double_blocks) { | |
64 | offsets[n++] = UFS_DIND_BLOCK; | |
65 | offsets[n++] = i_block >> ptrs_bits; | |
66 | offsets[n++] = i_block & (ptrs - 1); | |
67 | } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { | |
68 | offsets[n++] = UFS_TIND_BLOCK; | |
69 | offsets[n++] = i_block >> (ptrs_bits * 2); | |
70 | offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); | |
71 | offsets[n++] = i_block & (ptrs - 1); | |
72 | } else { | |
73 | ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); | |
74 | } | |
75 | return n; | |
76 | } | |
77 | ||
724bb09f AV |
78 | typedef struct { |
79 | void *p; | |
80 | union { | |
81 | __fs32 key32; | |
82 | __fs64 key64; | |
83 | }; | |
84 | struct buffer_head *bh; | |
85 | } Indirect; | |
86 | ||
87 | static inline int grow_chain32(struct ufs_inode_info *ufsi, | |
88 | struct buffer_head *bh, __fs32 *v, | |
89 | Indirect *from, Indirect *to) | |
90 | { | |
91 | Indirect *p; | |
92 | unsigned seq; | |
93 | to->bh = bh; | |
94 | do { | |
95 | seq = read_seqbegin(&ufsi->meta_lock); | |
96 | to->key32 = *(__fs32 *)(to->p = v); | |
97 | for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) | |
98 | ; | |
99 | } while (read_seqretry(&ufsi->meta_lock, seq)); | |
100 | return (p > to); | |
101 | } | |
102 | ||
103 | static inline int grow_chain64(struct ufs_inode_info *ufsi, | |
104 | struct buffer_head *bh, __fs64 *v, | |
105 | Indirect *from, Indirect *to) | |
106 | { | |
107 | Indirect *p; | |
108 | unsigned seq; | |
109 | to->bh = bh; | |
110 | do { | |
111 | seq = read_seqbegin(&ufsi->meta_lock); | |
112 | to->key64 = *(__fs64 *)(to->p = v); | |
113 | for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) | |
114 | ; | |
115 | } while (read_seqretry(&ufsi->meta_lock, seq)); | |
116 | return (p > to); | |
117 | } | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Returns the location of the fragment from | |
25985edc | 121 | * the beginning of the filesystem. |
1da177e4 LT |
122 | */ |
123 | ||
4b7068c8 | 124 | static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) |
1da177e4 LT |
125 | { |
126 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
127 | struct super_block *sb = inode->i_sb; | |
128 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
129 | u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; | |
130 | int shift = uspi->s_apbshift-uspi->s_fpbshift; | |
724bb09f | 131 | Indirect chain[4], *q = chain; |
4b7068c8 | 132 | unsigned *p; |
1da177e4 | 133 | unsigned flags = UFS_SB(sb)->s_flags; |
724bb09f | 134 | u64 res = 0; |
1da177e4 | 135 | |
7256d819 AM |
136 | UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", |
137 | uspi->s_fpbshift, uspi->s_apbmask, | |
138 | (unsigned long long)mask); | |
1da177e4 LT |
139 | |
140 | if (depth == 0) | |
724bb09f | 141 | goto no_block; |
1da177e4 | 142 | |
724bb09f | 143 | again: |
1da177e4 LT |
144 | p = offsets; |
145 | ||
1da177e4 LT |
146 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
147 | goto ufs2; | |
148 | ||
724bb09f AV |
149 | if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) |
150 | goto changed; | |
151 | if (!q->key32) | |
152 | goto no_block; | |
1da177e4 | 153 | while (--depth) { |
724bb09f | 154 | __fs32 *ptr; |
1da177e4 | 155 | struct buffer_head *bh; |
4e3911f3 | 156 | unsigned n = *p++; |
1da177e4 | 157 | |
724bb09f AV |
158 | bh = sb_bread(sb, uspi->s_sbbase + |
159 | fs32_to_cpu(sb, q->key32) + (n>>shift)); | |
1da177e4 | 160 | if (!bh) |
724bb09f AV |
161 | goto no_block; |
162 | ptr = (__fs32 *)bh->b_data + (n & mask); | |
163 | if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) | |
164 | goto changed; | |
165 | if (!q->key32) | |
166 | goto no_block; | |
1da177e4 | 167 | } |
724bb09f AV |
168 | res = fs32_to_cpu(sb, q->key32); |
169 | goto found; | |
1da177e4 | 170 | |
724bb09f AV |
171 | ufs2: |
172 | if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) | |
173 | goto changed; | |
174 | if (!q->key64) | |
175 | goto no_block; | |
1da177e4 LT |
176 | |
177 | while (--depth) { | |
724bb09f | 178 | __fs64 *ptr; |
1da177e4 | 179 | struct buffer_head *bh; |
4e3911f3 | 180 | unsigned n = *p++; |
1da177e4 | 181 | |
724bb09f AV |
182 | bh = sb_bread(sb, uspi->s_sbbase + |
183 | fs64_to_cpu(sb, q->key64) + (n>>shift)); | |
1da177e4 | 184 | if (!bh) |
724bb09f AV |
185 | goto no_block; |
186 | ptr = (__fs64 *)bh->b_data + (n & mask); | |
187 | if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) | |
188 | goto changed; | |
189 | if (!q->key64) | |
190 | goto no_block; | |
191 | } | |
192 | res = fs64_to_cpu(sb, q->key64); | |
193 | found: | |
4b7068c8 | 194 | res += uspi->s_sbbase; |
724bb09f AV |
195 | no_block: |
196 | while (q > chain) { | |
197 | brelse(q->bh); | |
198 | q--; | |
1da177e4 | 199 | } |
724bb09f | 200 | return res; |
1da177e4 | 201 | |
724bb09f AV |
202 | changed: |
203 | while (q > chain) { | |
204 | brelse(q->bh); | |
205 | q--; | |
206 | } | |
207 | goto again; | |
1da177e4 LT |
208 | } |
209 | ||
0f3c1294 AV |
210 | /* |
211 | * Unpacking tails: we have a file with partial final block and | |
212 | * we had been asked to extend it. If the fragment being written | |
213 | * is within the same block, we need to extend the tail just to cover | |
214 | * that fragment. Otherwise the tail is extended to full block. | |
215 | * | |
216 | * Note that we might need to create a _new_ tail, but that will | |
217 | * be handled elsewhere; this is strictly for resizing old | |
218 | * ones. | |
219 | */ | |
220 | static bool | |
221 | ufs_extend_tail(struct inode *inode, u64 writes_to, | |
222 | int *err, struct page *locked_page) | |
223 | { | |
224 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
225 | struct super_block *sb = inode->i_sb; | |
226 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
227 | unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */ | |
228 | unsigned block = ufs_fragstoblks(lastfrag); | |
229 | unsigned new_size; | |
230 | void *p; | |
231 | u64 tmp; | |
232 | ||
233 | if (writes_to < (lastfrag | uspi->s_fpbmask)) | |
234 | new_size = (writes_to & uspi->s_fpbmask) + 1; | |
235 | else | |
236 | new_size = uspi->s_fpb; | |
237 | ||
238 | p = ufs_get_direct_data_ptr(uspi, ufsi, block); | |
239 | tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p), | |
940ef1a0 AV |
240 | new_size - (lastfrag & uspi->s_fpbmask), err, |
241 | locked_page); | |
0f3c1294 AV |
242 | return tmp != 0; |
243 | } | |
244 | ||
022a6dc5 ED |
245 | /** |
246 | * ufs_inode_getfrag() - allocate new fragment(s) | |
edc023ca | 247 | * @inode: pointer to inode |
5336970b | 248 | * @index: number of block pointer within the inode's array. |
edc023ca | 249 | * @new_fragment: number of new allocated fragment(s) |
edc023ca | 250 | * @err: we set it if something wrong |
edc023ca FF |
251 | * @new: we set it if we allocate new block |
252 | * @locked_page: for ufs_new_fragments() | |
022a6dc5 | 253 | */ |
177848a0 | 254 | static u64 |
5336970b AV |
255 | ufs_inode_getfrag(struct inode *inode, unsigned index, |
256 | sector_t new_fragment, int *err, | |
4e317ce7 | 257 | int *new, struct page *locked_page) |
1da177e4 LT |
258 | { |
259 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
022a6dc5 ED |
260 | struct super_block *sb = inode->i_sb; |
261 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
5336970b | 262 | u64 tmp, goal, lastfrag; |
0f3c1294 AV |
263 | unsigned nfrags = uspi->s_fpb; |
264 | void *p; | |
1da177e4 | 265 | |
1da177e4 LT |
266 | /* TODO : to be done for write support |
267 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
268 | goto ufs2; | |
269 | */ | |
270 | ||
5336970b | 271 | p = ufs_get_direct_data_ptr(uspi, ufsi, index); |
54fb996a | 272 | tmp = ufs_data_ptr_to_cpu(sb, p); |
0f3c1294 AV |
273 | if (tmp) |
274 | goto out; | |
54fb996a | 275 | |
1da177e4 | 276 | lastfrag = ufsi->i_lastfrag; |
1da177e4 | 277 | |
0f3c1294 AV |
278 | /* will that be a new tail? */ |
279 | if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) | |
280 | nfrags = (new_fragment & uspi->s_fpbmask) + 1; | |
281 | ||
282 | goal = 0; | |
5336970b | 283 | if (index) { |
0f3c1294 | 284 | goal = ufs_data_ptr_to_cpu(sb, |
5336970b | 285 | ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); |
0f3c1294 AV |
286 | if (goal) |
287 | goal += uspi->s_fpb; | |
1da177e4 | 288 | } |
5336970b | 289 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), |
8785d84d | 290 | goal, nfrags, err, locked_page); |
0f3c1294 | 291 | |
1da177e4 | 292 | if (!tmp) { |
1da177e4 | 293 | *err = -ENOSPC; |
177848a0 | 294 | return 0; |
1da177e4 LT |
295 | } |
296 | ||
4e317ce7 | 297 | if (new) |
1da177e4 | 298 | *new = 1; |
02027d42 | 299 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
300 | if (IS_SYNC(inode)) |
301 | ufs_sync_inode (inode); | |
302 | mark_inode_dirty(inode); | |
bbb3eb9d | 303 | out: |
177848a0 | 304 | return tmp + uspi->s_sbbase; |
1da177e4 LT |
305 | |
306 | /* This part : To be implemented .... | |
307 | Required only for writing, not required for READ-ONLY. | |
308 | ufs2: | |
309 | ||
310 | u2_block = ufs_fragstoblks(fragment); | |
311 | u2_blockoff = ufs_fragnum(fragment); | |
312 | p = ufsi->i_u1.u2_i_data + block; | |
313 | goal = 0; | |
314 | ||
315 | repeat2: | |
316 | tmp = fs32_to_cpu(sb, *p); | |
317 | lastfrag = ufsi->i_lastfrag; | |
318 | ||
319 | */ | |
320 | } | |
321 | ||
022a6dc5 ED |
322 | /** |
323 | * ufs_inode_getblock() - allocate new block | |
edc023ca | 324 | * @inode: pointer to inode |
619cfac0 AV |
325 | * @ind_block: block number of the indirect block |
326 | * @index: number of pointer within the indirect block | |
edc023ca | 327 | * @new_fragment: number of new allocated fragment |
022a6dc5 | 328 | * (block will hold this fragment and also uspi->s_fpb-1) |
edc023ca | 329 | * @err: see ufs_inode_getfrag() |
edc023ca FF |
330 | * @new: see ufs_inode_getfrag() |
331 | * @locked_page: see ufs_inode_getfrag() | |
022a6dc5 | 332 | */ |
177848a0 | 333 | static u64 |
619cfac0 | 334 | ufs_inode_getblock(struct inode *inode, u64 ind_block, |
721435a7 | 335 | unsigned index, sector_t new_fragment, int *err, |
4e317ce7 | 336 | int *new, struct page *locked_page) |
1da177e4 | 337 | { |
022a6dc5 ED |
338 | struct super_block *sb = inode->i_sb; |
339 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
619cfac0 | 340 | int shift = uspi->s_apbshift - uspi->s_fpbshift; |
721435a7 | 341 | u64 tmp = 0, goal; |
619cfac0 | 342 | struct buffer_head *bh; |
54fb996a | 343 | void *p; |
1da177e4 | 344 | |
619cfac0 AV |
345 | if (!ind_block) |
346 | return 0; | |
347 | ||
348 | bh = sb_bread(sb, ind_block + (index >> shift)); | |
5fbfb238 AV |
349 | if (unlikely(!bh)) { |
350 | *err = -EIO; | |
619cfac0 | 351 | return 0; |
5fbfb238 | 352 | } |
619cfac0 AV |
353 | |
354 | index &= uspi->s_apbmask >> uspi->s_fpbshift; | |
54fb996a | 355 | if (uspi->fs_magic == UFS2_MAGIC) |
721435a7 | 356 | p = (__fs64 *)bh->b_data + index; |
54fb996a | 357 | else |
721435a7 | 358 | p = (__fs32 *)bh->b_data + index; |
5a39c255 | 359 | |
54fb996a | 360 | tmp = ufs_data_ptr_to_cpu(sb, p); |
bbb3eb9d | 361 | if (tmp) |
5a39c255 | 362 | goto out; |
1da177e4 | 363 | |
721435a7 AV |
364 | if (index && (uspi->fs_magic == UFS2_MAGIC ? |
365 | (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : | |
366 | (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) | |
1da177e4 LT |
367 | goal = tmp + uspi->s_fpb; |
368 | else | |
369 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
370 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
371 | uspi->s_fpb, err, locked_page); | |
5a39c255 | 372 | if (!tmp) |
1da177e4 | 373 | goto out; |
c9a27b5d | 374 | |
bbb3eb9d | 375 | if (new) |
1da177e4 | 376 | *new = 1; |
1da177e4 LT |
377 | |
378 | mark_buffer_dirty(bh); | |
379 | if (IS_SYNC(inode)) | |
380 | sync_dirty_buffer(bh); | |
02027d42 | 381 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
382 | mark_inode_dirty(inode); |
383 | out: | |
384 | brelse (bh); | |
abf5d15f | 385 | UFSD("EXIT\n"); |
177848a0 AV |
386 | if (tmp) |
387 | tmp += uspi->s_sbbase; | |
388 | return tmp; | |
1da177e4 LT |
389 | } |
390 | ||
022a6dc5 | 391 | /** |
7422caa5 | 392 | * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
022a6dc5 | 393 | * readpage, writepage and so on |
1da177e4 LT |
394 | */ |
395 | ||
010d331f | 396 | static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 | 397 | { |
0385f1f9 AV |
398 | struct super_block *sb = inode->i_sb; |
399 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
400 | int err = 0, new = 0; | |
4b7068c8 AV |
401 | unsigned offsets[4]; |
402 | int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); | |
1da177e4 | 403 | u64 phys64 = 0; |
177848a0 | 404 | unsigned frag = fragment & uspi->s_fpbmask; |
010d331f | 405 | |
09bf4f5b AV |
406 | phys64 = ufs_frag_map(inode, offsets, depth); |
407 | if (!create) | |
408 | goto done; | |
1da177e4 | 409 | |
09bf4f5b AV |
410 | if (phys64) { |
411 | if (fragment >= UFS_NDIR_FRAGMENT) | |
412 | goto done; | |
413 | read_seqlock_excl(&UFS_I(inode)->meta_lock); | |
414 | if (fragment < UFS_I(inode)->i_lastfrag) { | |
415 | read_sequnlock_excl(&UFS_I(inode)->meta_lock); | |
416 | goto done; | |
417 | } | |
418 | read_sequnlock_excl(&UFS_I(inode)->meta_lock); | |
419 | } | |
1da177e4 LT |
420 | /* This code entered only while writing ....? */ |
421 | ||
724bb09f | 422 | mutex_lock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 423 | |
abf5d15f | 424 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
0385f1f9 AV |
425 | if (unlikely(!depth)) { |
426 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
427 | err = -EIO; | |
428 | goto out; | |
429 | } | |
0f3c1294 AV |
430 | |
431 | if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { | |
432 | unsigned lastfrag = UFS_I(inode)->i_lastfrag; | |
433 | unsigned tailfrags = lastfrag & uspi->s_fpbmask; | |
434 | if (tailfrags && fragment >= lastfrag) { | |
435 | if (!ufs_extend_tail(inode, fragment, | |
436 | &err, bh_result->b_page)) | |
0385f1f9 | 437 | goto out; |
0f3c1294 AV |
438 | } |
439 | } | |
440 | ||
71dd4284 | 441 | if (depth == 1) { |
5336970b | 442 | phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
4e317ce7 | 443 | &err, &new, bh_result->b_page); |
4eeff4c9 AV |
444 | } else { |
445 | int i; | |
5336970b | 446 | phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
4e317ce7 | 447 | &err, NULL, NULL); |
4eeff4c9 AV |
448 | for (i = 1; i < depth - 1; i++) |
449 | phys64 = ufs_inode_getblock(inode, phys64, offsets[i], | |
4e317ce7 | 450 | fragment, &err, NULL, NULL); |
4eeff4c9 | 451 | phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], |
4e317ce7 | 452 | fragment, &err, &new, bh_result->b_page); |
1da177e4 | 453 | } |
0385f1f9 | 454 | out: |
177848a0 AV |
455 | if (phys64) { |
456 | phys64 += frag; | |
0385f1f9 AV |
457 | map_bh(bh_result, sb, phys64); |
458 | if (new) | |
459 | set_buffer_new(bh_result); | |
177848a0 | 460 | } |
724bb09f | 461 | mutex_unlock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 462 | return err; |
09bf4f5b AV |
463 | |
464 | done: | |
465 | if (phys64) | |
466 | map_bh(bh_result, sb, phys64 + frag); | |
467 | return 0; | |
1da177e4 LT |
468 | } |
469 | ||
1da177e4 LT |
470 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) |
471 | { | |
472 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
473 | } | |
82b9d1d0 | 474 | |
1da177e4 LT |
475 | static int ufs_readpage(struct file *file, struct page *page) |
476 | { | |
477 | return block_read_full_page(page,ufs_getfrag_block); | |
478 | } | |
82b9d1d0 | 479 | |
f4e420dc | 480 | int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 481 | { |
6e1db88d | 482 | return __block_write_begin(page, pos, len, ufs_getfrag_block); |
1da177e4 | 483 | } |
82b9d1d0 | 484 | |
010d331f AV |
485 | static void ufs_truncate_blocks(struct inode *); |
486 | ||
83f6e371 MS |
487 | static void ufs_write_failed(struct address_space *mapping, loff_t to) |
488 | { | |
489 | struct inode *inode = mapping->host; | |
490 | ||
3b7a3a05 | 491 | if (to > inode->i_size) { |
7caef267 | 492 | truncate_pagecache(inode, inode->i_size); |
3b7a3a05 AV |
493 | ufs_truncate_blocks(inode); |
494 | } | |
83f6e371 MS |
495 | } |
496 | ||
82b9d1d0 NP |
497 | static int ufs_write_begin(struct file *file, struct address_space *mapping, |
498 | loff_t pos, unsigned len, unsigned flags, | |
499 | struct page **pagep, void **fsdata) | |
500 | { | |
155130a4 CH |
501 | int ret; |
502 | ||
503 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 504 | ufs_getfrag_block); |
83f6e371 MS |
505 | if (unlikely(ret)) |
506 | ufs_write_failed(mapping, pos + len); | |
155130a4 CH |
507 | |
508 | return ret; | |
82b9d1d0 NP |
509 | } |
510 | ||
3b7a3a05 AV |
511 | static int ufs_write_end(struct file *file, struct address_space *mapping, |
512 | loff_t pos, unsigned len, unsigned copied, | |
513 | struct page *page, void *fsdata) | |
514 | { | |
515 | int ret; | |
516 | ||
517 | ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); | |
518 | if (ret < len) | |
519 | ufs_write_failed(mapping, pos + len); | |
520 | return ret; | |
521 | } | |
522 | ||
1da177e4 LT |
523 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) |
524 | { | |
525 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
526 | } | |
82b9d1d0 | 527 | |
f5e54d6e | 528 | const struct address_space_operations ufs_aops = { |
1da177e4 LT |
529 | .readpage = ufs_readpage, |
530 | .writepage = ufs_writepage, | |
82b9d1d0 | 531 | .write_begin = ufs_write_begin, |
3b7a3a05 | 532 | .write_end = ufs_write_end, |
1da177e4 LT |
533 | .bmap = ufs_bmap |
534 | }; | |
535 | ||
826843a3 ED |
536 | static void ufs_set_inode_ops(struct inode *inode) |
537 | { | |
538 | if (S_ISREG(inode->i_mode)) { | |
539 | inode->i_op = &ufs_file_inode_operations; | |
540 | inode->i_fop = &ufs_file_operations; | |
541 | inode->i_mapping->a_ops = &ufs_aops; | |
542 | } else if (S_ISDIR(inode->i_mode)) { | |
543 | inode->i_op = &ufs_dir_inode_operations; | |
544 | inode->i_fop = &ufs_dir_operations; | |
545 | inode->i_mapping->a_ops = &ufs_aops; | |
546 | } else if (S_ISLNK(inode->i_mode)) { | |
4b8061a6 | 547 | if (!inode->i_blocks) { |
4b8061a6 | 548 | inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; |
9cdce3c0 | 549 | inode->i_op = &simple_symlink_inode_operations; |
4b8061a6 | 550 | } else { |
826843a3 | 551 | inode->i_mapping->a_ops = &ufs_aops; |
9cdce3c0 | 552 | inode->i_op = &page_symlink_inode_operations; |
21fc61c7 | 553 | inode_nohighmem(inode); |
826843a3 ED |
554 | } |
555 | } else | |
556 | init_special_inode(inode, inode->i_mode, | |
557 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
558 | } | |
559 | ||
07a0cfec | 560 | static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 LT |
561 | { |
562 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
05f225dc | 563 | struct super_block *sb = inode->i_sb; |
6a9a06d9 | 564 | umode_t mode; |
1da177e4 LT |
565 | |
566 | /* | |
567 | * Copy data to the in-core inode. | |
568 | */ | |
569 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
bfe86848 | 570 | set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); |
c0ef65d2 AV |
571 | if (inode->i_nlink == 0) |
572 | return -ESTALE; | |
010d331f | 573 | |
1da177e4 LT |
574 | /* |
575 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
576 | */ | |
72235465 EB |
577 | i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); |
578 | i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); | |
1da177e4 LT |
579 | |
580 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
23ac7cba AV |
581 | inode->i_atime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); |
582 | inode->i_ctime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
583 | inode->i_mtime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
1da177e4 LT |
584 | inode->i_mtime.tv_nsec = 0; |
585 | inode->i_atime.tv_nsec = 0; | |
586 | inode->i_ctime.tv_nsec = 0; | |
587 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
3313e292 | 588 | inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); |
1da177e4 | 589 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
1da177e4 LT |
590 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
591 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
05f225dc | 592 | |
010d331f | 593 | |
1da177e4 | 594 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
f33219b7 DG |
595 | memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, |
596 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
dd187a26 | 597 | } else { |
f33219b7 | 598 | memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, |
b12903f1 DG |
599 | sizeof(ufs_inode->ui_u2.ui_symlink) - 1); |
600 | ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 601 | } |
07a0cfec | 602 | return 0; |
05f225dc | 603 | } |
1da177e4 | 604 | |
07a0cfec | 605 | static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
05f225dc ED |
606 | { |
607 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
608 | struct super_block *sb = inode->i_sb; | |
6a9a06d9 | 609 | umode_t mode; |
1da177e4 | 610 | |
abf5d15f | 611 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
612 | /* |
613 | * Copy data to the in-core inode. | |
614 | */ | |
615 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
bfe86848 | 616 | set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); |
c0ef65d2 AV |
617 | if (inode->i_nlink == 0) |
618 | return -ESTALE; | |
1da177e4 LT |
619 | |
620 | /* | |
621 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
622 | */ | |
72235465 EB |
623 | i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); |
624 | i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); | |
1da177e4 LT |
625 | |
626 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
2189850f ED |
627 | inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); |
628 | inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); | |
629 | inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); | |
630 | inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); | |
631 | inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); | |
632 | inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); | |
1da177e4 | 633 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); |
3313e292 | 634 | inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); |
1da177e4 | 635 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
1da177e4 LT |
636 | /* |
637 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
638 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
639 | */ | |
1da177e4 LT |
640 | |
641 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
f33219b7 DG |
642 | memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, |
643 | sizeof(ufs2_inode->ui_u2.ui_addr)); | |
05f225dc | 644 | } else { |
f33219b7 | 645 | memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, |
b12903f1 DG |
646 | sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); |
647 | ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 648 | } |
07a0cfec | 649 | return 0; |
05f225dc ED |
650 | } |
651 | ||
b55c460d | 652 | struct inode *ufs_iget(struct super_block *sb, unsigned long ino) |
05f225dc | 653 | { |
b55c460d DH |
654 | struct ufs_inode_info *ufsi; |
655 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
05f225dc | 656 | struct buffer_head * bh; |
b55c460d | 657 | struct inode *inode; |
c0ef65d2 | 658 | int err = -EIO; |
05f225dc | 659 | |
b55c460d | 660 | UFSD("ENTER, ino %lu\n", ino); |
05f225dc | 661 | |
b55c460d | 662 | if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { |
05f225dc | 663 | ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", |
b55c460d DH |
664 | ino); |
665 | return ERR_PTR(-EIO); | |
05f225dc ED |
666 | } |
667 | ||
b55c460d DH |
668 | inode = iget_locked(sb, ino); |
669 | if (!inode) | |
670 | return ERR_PTR(-ENOMEM); | |
671 | if (!(inode->i_state & I_NEW)) | |
672 | return inode; | |
673 | ||
674 | ufsi = UFS_I(inode); | |
675 | ||
05f225dc ED |
676 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); |
677 | if (!bh) { | |
678 | ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", | |
679 | inode->i_ino); | |
680 | goto bad_inode; | |
681 | } | |
682 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
683 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
684 | ||
07a0cfec ED |
685 | err = ufs2_read_inode(inode, |
686 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
687 | } else { |
688 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; | |
689 | ||
07a0cfec ED |
690 | err = ufs1_read_inode(inode, |
691 | ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc | 692 | } |
c0ef65d2 | 693 | brelse(bh); |
07a0cfec ED |
694 | if (err) |
695 | goto bad_inode; | |
c0ef65d2 | 696 | |
bb8c2d66 | 697 | inode_inc_iversion(inode); |
05f225dc ED |
698 | ufsi->i_lastfrag = |
699 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
700 | ufsi->i_dir_start_lookup = 0; | |
1da177e4 LT |
701 | ufsi->i_osync = 0; |
702 | ||
826843a3 | 703 | ufs_set_inode_ops(inode); |
1da177e4 | 704 | |
abf5d15f | 705 | UFSD("EXIT\n"); |
b55c460d DH |
706 | unlock_new_inode(inode); |
707 | return inode; | |
05f225dc ED |
708 | |
709 | bad_inode: | |
b55c460d | 710 | iget_failed(inode); |
c0ef65d2 | 711 | return ERR_PTR(err); |
1da177e4 LT |
712 | } |
713 | ||
3313e292 | 714 | static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 | 715 | { |
3313e292 ED |
716 | struct super_block *sb = inode->i_sb; |
717 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1da177e4 LT |
718 | |
719 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
720 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
721 | ||
72235465 EB |
722 | ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); |
723 | ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); | |
010d331f | 724 | |
1da177e4 LT |
725 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); |
726 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
727 | ufs_inode->ui_atime.tv_usec = 0; | |
728 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
729 | ufs_inode->ui_ctime.tv_usec = 0; | |
730 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
731 | ufs_inode->ui_mtime.tv_usec = 0; | |
732 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
733 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
3313e292 | 734 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
1da177e4 | 735 | |
3313e292 | 736 | if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
1da177e4 LT |
737 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); |
738 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
739 | } | |
740 | ||
741 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
742 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
743 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
744 | } else if (inode->i_blocks) { | |
f33219b7 DG |
745 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, |
746 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
1da177e4 LT |
747 | } |
748 | else { | |
f33219b7 DG |
749 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
750 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
1da177e4 LT |
751 | } |
752 | ||
753 | if (!inode->i_nlink) | |
754 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
3313e292 ED |
755 | } |
756 | ||
757 | static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) | |
758 | { | |
759 | struct super_block *sb = inode->i_sb; | |
760 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
3313e292 ED |
761 | |
762 | UFSD("ENTER\n"); | |
763 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
764 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
765 | ||
72235465 EB |
766 | ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); |
767 | ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); | |
3313e292 ED |
768 | |
769 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
2189850f ED |
770 | ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); |
771 | ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); | |
772 | ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); | |
773 | ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); | |
774 | ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); | |
775 | ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); | |
3313e292 ED |
776 | |
777 | ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); | |
778 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
779 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); | |
780 | ||
781 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
782 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
783 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; | |
784 | } else if (inode->i_blocks) { | |
f33219b7 DG |
785 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, |
786 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
3313e292 | 787 | } else { |
f33219b7 DG |
788 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
789 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
3313e292 ED |
790 | } |
791 | ||
792 | if (!inode->i_nlink) | |
793 | memset (ufs_inode, 0, sizeof(struct ufs2_inode)); | |
794 | UFSD("EXIT\n"); | |
795 | } | |
796 | ||
797 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
798 | { | |
799 | struct super_block *sb = inode->i_sb; | |
800 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
801 | struct buffer_head * bh; | |
802 | ||
803 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
804 | ||
805 | if (inode->i_ino < UFS_ROOTINO || | |
806 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
807 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
808 | return -1; | |
809 | } | |
810 | ||
811 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
812 | if (!bh) { | |
813 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
814 | return -1; | |
815 | } | |
816 | if (uspi->fs_magic == UFS2_MAGIC) { | |
817 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
818 | ||
819 | ufs2_update_inode(inode, | |
820 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
821 | } else { | |
822 | struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; | |
823 | ||
824 | ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
825 | } | |
010d331f | 826 | |
1da177e4 LT |
827 | mark_buffer_dirty(bh); |
828 | if (do_sync) | |
829 | sync_dirty_buffer(bh); | |
830 | brelse (bh); | |
010d331f | 831 | |
abf5d15f | 832 | UFSD("EXIT\n"); |
1da177e4 LT |
833 | return 0; |
834 | } | |
835 | ||
a9185b41 | 836 | int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 837 | { |
f3e0f3da | 838 | return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
839 | } |
840 | ||
841 | int ufs_sync_inode (struct inode *inode) | |
842 | { | |
843 | return ufs_update_inode (inode, 1); | |
844 | } | |
845 | ||
58e8268c | 846 | void ufs_evict_inode(struct inode * inode) |
1da177e4 | 847 | { |
58e8268c AV |
848 | int want_delete = 0; |
849 | ||
850 | if (!inode->i_nlink && !is_bad_inode(inode)) | |
851 | want_delete = 1; | |
10e5dce0 | 852 | |
91b0abe3 | 853 | truncate_inode_pages_final(&inode->i_data); |
58e8268c | 854 | if (want_delete) { |
58e8268c | 855 | inode->i_size = 0; |
babef37d AV |
856 | if (inode->i_blocks && |
857 | (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
858 | S_ISLNK(inode->i_mode))) | |
d622f167 | 859 | ufs_truncate_blocks(inode); |
67a70017 | 860 | ufs_update_inode(inode, inode_needs_sync(inode)); |
58e8268c AV |
861 | } |
862 | ||
863 | invalidate_inode_buffers(inode); | |
dbd5768f | 864 | clear_inode(inode); |
58e8268c | 865 | |
f3e0f3da | 866 | if (want_delete) |
9ef7db7f | 867 | ufs_free_inode(inode); |
1da177e4 | 868 | } |
010d331f | 869 | |
a138b4b6 AV |
870 | struct to_free { |
871 | struct inode *inode; | |
872 | u64 to; | |
873 | unsigned count; | |
874 | }; | |
875 | ||
876 | static inline void free_data(struct to_free *ctx, u64 from, unsigned count) | |
877 | { | |
878 | if (ctx->count && ctx->to != from) { | |
879 | ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); | |
880 | ctx->count = 0; | |
881 | } | |
882 | ctx->count += count; | |
883 | ctx->to = from + count; | |
884 | } | |
885 | ||
010d331f AV |
886 | #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) |
887 | ||
888 | static void ufs_trunc_direct(struct inode *inode) | |
889 | { | |
890 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
891 | struct super_block * sb; | |
892 | struct ufs_sb_private_info * uspi; | |
893 | void *p; | |
894 | u64 frag1, frag2, frag3, frag4, block1, block2; | |
a138b4b6 | 895 | struct to_free ctx = {.inode = inode}; |
010d331f AV |
896 | unsigned i, tmp; |
897 | ||
898 | UFSD("ENTER: ino %lu\n", inode->i_ino); | |
899 | ||
900 | sb = inode->i_sb; | |
901 | uspi = UFS_SB(sb)->s_uspi; | |
902 | ||
010d331f AV |
903 | frag1 = DIRECT_FRAGMENT; |
904 | frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); | |
905 | frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); | |
906 | frag3 = frag4 & ~uspi->s_fpbmask; | |
907 | block1 = block2 = 0; | |
908 | if (frag2 > frag3) { | |
909 | frag2 = frag4; | |
910 | frag3 = frag4 = 0; | |
911 | } else if (frag2 < frag3) { | |
912 | block1 = ufs_fragstoblks (frag2); | |
913 | block2 = ufs_fragstoblks (frag3); | |
914 | } | |
915 | ||
916 | UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," | |
917 | " frag3 %llu, frag4 %llu\n", inode->i_ino, | |
918 | (unsigned long long)frag1, (unsigned long long)frag2, | |
919 | (unsigned long long)block1, (unsigned long long)block2, | |
920 | (unsigned long long)frag3, (unsigned long long)frag4); | |
921 | ||
922 | if (frag1 >= frag2) | |
923 | goto next1; | |
924 | ||
925 | /* | |
926 | * Free first free fragments | |
927 | */ | |
928 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); | |
929 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
930 | if (!tmp ) | |
931 | ufs_panic (sb, "ufs_trunc_direct", "internal error"); | |
932 | frag2 -= frag1; | |
933 | frag1 = ufs_fragnum (frag1); | |
934 | ||
935 | ufs_free_fragments(inode, tmp + frag1, frag2); | |
010d331f AV |
936 | |
937 | next1: | |
938 | /* | |
939 | * Free whole blocks | |
940 | */ | |
941 | for (i = block1 ; i < block2; i++) { | |
942 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); | |
943 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
944 | if (!tmp) | |
945 | continue; | |
946 | write_seqlock(&ufsi->meta_lock); | |
947 | ufs_data_ptr_clear(uspi, p); | |
948 | write_sequnlock(&ufsi->meta_lock); | |
949 | ||
a138b4b6 | 950 | free_data(&ctx, tmp, uspi->s_fpb); |
010d331f AV |
951 | } |
952 | ||
a138b4b6 | 953 | free_data(&ctx, 0, 0); |
010d331f AV |
954 | |
955 | if (frag3 >= frag4) | |
956 | goto next3; | |
957 | ||
958 | /* | |
959 | * Free last free fragments | |
960 | */ | |
961 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); | |
962 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
963 | if (!tmp ) | |
964 | ufs_panic(sb, "ufs_truncate_direct", "internal error"); | |
965 | frag4 = ufs_fragnum (frag4); | |
966 | write_seqlock(&ufsi->meta_lock); | |
967 | ufs_data_ptr_clear(uspi, p); | |
968 | write_sequnlock(&ufsi->meta_lock); | |
969 | ||
970 | ufs_free_fragments (inode, tmp, frag4); | |
010d331f AV |
971 | next3: |
972 | ||
973 | UFSD("EXIT: ino %lu\n", inode->i_ino); | |
974 | } | |
975 | ||
163073db | 976 | static void free_full_branch(struct inode *inode, u64 ind_block, int depth) |
6d1ebbca AV |
977 | { |
978 | struct super_block *sb = inode->i_sb; | |
979 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
163073db | 980 | struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); |
6d1ebbca AV |
981 | unsigned i; |
982 | ||
163073db | 983 | if (!ubh) |
6d1ebbca | 984 | return; |
6d1ebbca AV |
985 | |
986 | if (--depth) { | |
163073db AV |
987 | for (i = 0; i < uspi->s_apb; i++) { |
988 | void *p = ubh_get_data_ptr(uspi, ubh, i); | |
989 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 990 | if (block) |
163073db | 991 | free_full_branch(inode, block, depth); |
6d1ebbca AV |
992 | } |
993 | } else { | |
994 | struct to_free ctx = {.inode = inode}; | |
995 | ||
996 | for (i = 0; i < uspi->s_apb; i++) { | |
163073db AV |
997 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
998 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 999 | if (block) |
163073db | 1000 | free_data(&ctx, block, uspi->s_fpb); |
6d1ebbca AV |
1001 | } |
1002 | free_data(&ctx, 0, 0); | |
1003 | } | |
6d1ebbca AV |
1004 | |
1005 | ubh_bforget(ubh); | |
163073db | 1006 | ufs_free_blocks(inode, ind_block, uspi->s_fpb); |
6d1ebbca AV |
1007 | } |
1008 | ||
7b4e4f7f | 1009 | static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) |
010d331f | 1010 | { |
7bad5939 AV |
1011 | struct super_block *sb = inode->i_sb; |
1012 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1013 | unsigned i; |
010d331f | 1014 | |
9e0fbbde | 1015 | if (--depth) { |
7b4e4f7f | 1016 | for (i = from; i < uspi->s_apb ; i++) { |
163073db AV |
1017 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1018 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1019 | if (block) { | |
1020 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1021 | ufs_data_ptr_clear(uspi, p); | |
1022 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1023 | ubh_mark_buffer_dirty(ubh); | |
1024 | free_full_branch(inode, block, depth); | |
1025 | } | |
a9657423 | 1026 | } |
9e0fbbde | 1027 | } else { |
a138b4b6 | 1028 | struct to_free ctx = {.inode = inode}; |
9e0fbbde AV |
1029 | |
1030 | for (i = from; i < uspi->s_apb; i++) { | |
163073db AV |
1031 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1032 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1033 | if (block) { | |
1034 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1035 | ufs_data_ptr_clear(uspi, p); | |
1036 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1037 | ubh_mark_buffer_dirty(ubh); | |
1038 | free_data(&ctx, block, uspi->s_fpb); | |
163073db | 1039 | } |
9e0fbbde | 1040 | } |
a138b4b6 | 1041 | free_data(&ctx, 0, 0); |
010d331f | 1042 | } |
9e0fbbde AV |
1043 | if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) |
1044 | ubh_sync_block(ubh); | |
1045 | ubh_brelse(ubh); | |
010d331f AV |
1046 | } |
1047 | ||
1048 | static int ufs_alloc_lastblock(struct inode *inode, loff_t size) | |
1049 | { | |
1050 | int err = 0; | |
1051 | struct super_block *sb = inode->i_sb; | |
1052 | struct address_space *mapping = inode->i_mapping; | |
1053 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1054 | unsigned i, end; | |
1055 | sector_t lastfrag; | |
1056 | struct page *lastpage; | |
1057 | struct buffer_head *bh; | |
1058 | u64 phys64; | |
1059 | ||
1060 | lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
1061 | ||
1062 | if (!lastfrag) | |
1063 | goto out; | |
1064 | ||
1065 | lastfrag--; | |
1066 | ||
1067 | lastpage = ufs_get_locked_page(mapping, lastfrag >> | |
09cbfeaf | 1068 | (PAGE_SHIFT - inode->i_blkbits)); |
010d331f AV |
1069 | if (IS_ERR(lastpage)) { |
1070 | err = -EIO; | |
1071 | goto out; | |
1072 | } | |
1073 | ||
09cbfeaf | 1074 | end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); |
010d331f AV |
1075 | bh = page_buffers(lastpage); |
1076 | for (i = 0; i < end; ++i) | |
1077 | bh = bh->b_this_page; | |
1078 | ||
1079 | ||
1080 | err = ufs_getfrag_block(inode, lastfrag, bh, 1); | |
1081 | ||
1082 | if (unlikely(err)) | |
1083 | goto out_unlock; | |
1084 | ||
1085 | if (buffer_new(bh)) { | |
1086 | clear_buffer_new(bh); | |
e64855c6 | 1087 | clean_bdev_bh_alias(bh); |
010d331f AV |
1088 | /* |
1089 | * we do not zeroize fragment, because of | |
1090 | * if it maped to hole, it already contains zeroes | |
1091 | */ | |
1092 | set_buffer_uptodate(bh); | |
1093 | mark_buffer_dirty(bh); | |
1094 | set_page_dirty(lastpage); | |
1095 | } | |
1096 | ||
1097 | if (lastfrag >= UFS_IND_FRAGMENT) { | |
1098 | end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; | |
1099 | phys64 = bh->b_blocknr + 1; | |
1100 | for (i = 0; i < end; ++i) { | |
1101 | bh = sb_getblk(sb, i + phys64); | |
1102 | lock_buffer(bh); | |
1103 | memset(bh->b_data, 0, sb->s_blocksize); | |
1104 | set_buffer_uptodate(bh); | |
1105 | mark_buffer_dirty(bh); | |
1106 | unlock_buffer(bh); | |
1107 | sync_dirty_buffer(bh); | |
1108 | brelse(bh); | |
1109 | } | |
1110 | } | |
1111 | out_unlock: | |
1112 | ufs_put_locked_page(lastpage); | |
1113 | out: | |
1114 | return err; | |
1115 | } | |
1116 | ||
babef37d | 1117 | static void ufs_truncate_blocks(struct inode *inode) |
010d331f AV |
1118 | { |
1119 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1120 | struct super_block *sb = inode->i_sb; | |
1121 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1122 | unsigned offsets[4]; |
a8fad984 | 1123 | int depth; |
6775e24d | 1124 | int depth2; |
42432739 | 1125 | unsigned i; |
7b4e4f7f AV |
1126 | struct ufs_buffer_head *ubh[3]; |
1127 | void *p; | |
1128 | u64 block; | |
6775e24d | 1129 | |
a8fad984 AV |
1130 | if (inode->i_size) { |
1131 | sector_t last = (inode->i_size - 1) >> uspi->s_bshift; | |
1132 | depth = ufs_block_to_path(inode, last, offsets); | |
1133 | if (!depth) | |
1134 | return; | |
1135 | } else { | |
1136 | depth = 1; | |
1137 | } | |
6775e24d | 1138 | |
6775e24d | 1139 | for (depth2 = depth - 1; depth2; depth2--) |
a8fad984 | 1140 | if (offsets[depth2] != uspi->s_apb - 1) |
6775e24d | 1141 | break; |
010d331f AV |
1142 | |
1143 | mutex_lock(&ufsi->truncate_mutex); | |
42432739 | 1144 | if (depth == 1) { |
31cd043e | 1145 | ufs_trunc_direct(inode); |
42432739 AV |
1146 | offsets[0] = UFS_IND_BLOCK; |
1147 | } else { | |
7b4e4f7f | 1148 | /* get the blocks that should be partially emptied */ |
a8fad984 | 1149 | p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++); |
7b4e4f7f | 1150 | for (i = 0; i < depth2; i++) { |
7b4e4f7f AV |
1151 | block = ufs_data_ptr_to_cpu(sb, p); |
1152 | if (!block) | |
1153 | break; | |
1154 | ubh[i] = ubh_bread(sb, block, uspi->s_bsize); | |
1155 | if (!ubh[i]) { | |
1156 | write_seqlock(&ufsi->meta_lock); | |
1157 | ufs_data_ptr_clear(uspi, p); | |
1158 | write_sequnlock(&ufsi->meta_lock); | |
1159 | break; | |
1160 | } | |
a8fad984 | 1161 | p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++); |
7b4e4f7f | 1162 | } |
f53bd142 | 1163 | while (i--) |
7b4e4f7f | 1164 | free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); |
42432739 AV |
1165 | } |
1166 | for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { | |
163073db AV |
1167 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); |
1168 | block = ufs_data_ptr_to_cpu(sb, p); | |
1169 | if (block) { | |
1170 | write_seqlock(&ufsi->meta_lock); | |
1171 | ufs_data_ptr_clear(uspi, p); | |
1172 | write_sequnlock(&ufsi->meta_lock); | |
1173 | free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); | |
1174 | } | |
31cd043e | 1175 | } |
09bf4f5b | 1176 | read_seqlock_excl(&ufsi->meta_lock); |
010d331f | 1177 | ufsi->i_lastfrag = DIRECT_FRAGMENT; |
09bf4f5b | 1178 | read_sequnlock_excl(&ufsi->meta_lock); |
b6eede0e | 1179 | mark_inode_dirty(inode); |
010d331f AV |
1180 | mutex_unlock(&ufsi->truncate_mutex); |
1181 | } | |
1182 | ||
1183 | static int ufs_truncate(struct inode *inode, loff_t size) | |
1184 | { | |
1185 | int err = 0; | |
1186 | ||
1187 | UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", | |
1188 | inode->i_ino, (unsigned long long)size, | |
1189 | (unsigned long long)i_size_read(inode)); | |
1190 | ||
1191 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1192 | S_ISLNK(inode->i_mode))) | |
1193 | return -EINVAL; | |
1194 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1195 | return -EPERM; | |
1196 | ||
1197 | err = ufs_alloc_lastblock(inode, size); | |
1198 | ||
1199 | if (err) | |
1200 | goto out; | |
1201 | ||
1202 | block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); | |
1203 | ||
1204 | truncate_setsize(inode, size); | |
1205 | ||
babef37d | 1206 | ufs_truncate_blocks(inode); |
02027d42 | 1207 | inode->i_mtime = inode->i_ctime = current_time(inode); |
010d331f AV |
1208 | mark_inode_dirty(inode); |
1209 | out: | |
1210 | UFSD("EXIT: err %d\n", err); | |
1211 | return err; | |
1212 | } | |
1213 | ||
010d331f AV |
1214 | int ufs_setattr(struct dentry *dentry, struct iattr *attr) |
1215 | { | |
1216 | struct inode *inode = d_inode(dentry); | |
1217 | unsigned int ia_valid = attr->ia_valid; | |
1218 | int error; | |
1219 | ||
31051c85 | 1220 | error = setattr_prepare(dentry, attr); |
010d331f AV |
1221 | if (error) |
1222 | return error; | |
1223 | ||
1224 | if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { | |
1225 | error = ufs_truncate(inode, attr->ia_size); | |
1226 | if (error) | |
1227 | return error; | |
1228 | } | |
1229 | ||
1230 | setattr_copy(inode, attr); | |
1231 | mark_inode_dirty(inode); | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | const struct inode_operations ufs_file_inode_operations = { | |
1236 | .setattr = ufs_setattr, | |
1237 | }; |