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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/affs/inode.c | |
3 | * | |
4 | * (c) 1996 Hans-Joachim Widmaier - Rewritten | |
5 | * | |
6 | * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem. | |
7 | * | |
8 | * (C) 1992 Eric Youngdale Modified for ISO9660 filesystem. | |
9 | * | |
10 | * (C) 1991 Linus Torvalds - minix filesystem | |
11 | */ | |
e8edc6e0 | 12 | #include <linux/sched.h> |
5b825c3a | 13 | #include <linux/cred.h> |
5a0e3ad6 | 14 | #include <linux/gfp.h> |
1da177e4 LT |
15 | #include "affs.h" |
16 | ||
210f8559 | 17 | struct inode *affs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 18 | { |
1da177e4 LT |
19 | struct affs_sb_info *sbi = AFFS_SB(sb); |
20 | struct buffer_head *bh; | |
1da177e4 | 21 | struct affs_tail *tail; |
210f8559 | 22 | struct inode *inode; |
1da177e4 LT |
23 | u32 block; |
24 | u32 size; | |
25 | u32 prot; | |
26 | u16 id; | |
27 | ||
210f8559 DH |
28 | inode = iget_locked(sb, ino); |
29 | if (!inode) | |
30 | return ERR_PTR(-ENOMEM); | |
31 | if (!(inode->i_state & I_NEW)) | |
32 | return inode; | |
33 | ||
9606d9aa | 34 | pr_debug("affs_iget(%lu)\n", inode->i_ino); |
1da177e4 LT |
35 | |
36 | block = inode->i_ino; | |
37 | bh = affs_bread(sb, block); | |
38 | if (!bh) { | |
39 | affs_warning(sb, "read_inode", "Cannot read block %d", block); | |
40 | goto bad_inode; | |
41 | } | |
42 | if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) { | |
43 | affs_warning(sb,"read_inode", | |
44 | "Checksum or type (ptype=%d) error on inode %d", | |
45 | AFFS_HEAD(bh)->ptype, block); | |
46 | goto bad_inode; | |
47 | } | |
48 | ||
1da177e4 LT |
49 | tail = AFFS_TAIL(sb, bh); |
50 | prot = be32_to_cpu(tail->protect); | |
51 | ||
52 | inode->i_size = 0; | |
bfe86848 | 53 | set_nlink(inode, 1); |
1da177e4 LT |
54 | inode->i_mode = 0; |
55 | AFFS_I(inode)->i_extcnt = 1; | |
56 | AFFS_I(inode)->i_ext_last = ~1; | |
57 | AFFS_I(inode)->i_protect = prot; | |
dca3c336 | 58 | atomic_set(&AFFS_I(inode)->i_opencnt, 0); |
1da177e4 LT |
59 | AFFS_I(inode)->i_blkcnt = 0; |
60 | AFFS_I(inode)->i_lc = NULL; | |
61 | AFFS_I(inode)->i_lc_size = 0; | |
62 | AFFS_I(inode)->i_lc_shift = 0; | |
63 | AFFS_I(inode)->i_lc_mask = 0; | |
64 | AFFS_I(inode)->i_ac = NULL; | |
65 | AFFS_I(inode)->i_ext_bh = NULL; | |
66 | AFFS_I(inode)->mmu_private = 0; | |
67 | AFFS_I(inode)->i_lastalloc = 0; | |
68 | AFFS_I(inode)->i_pa_cnt = 0; | |
69 | ||
79bda4d5 | 70 | if (affs_test_opt(sbi->s_flags, SF_SETMODE)) |
1da177e4 LT |
71 | inode->i_mode = sbi->s_mode; |
72 | else | |
c1618208 | 73 | inode->i_mode = affs_prot_to_mode(prot); |
1da177e4 LT |
74 | |
75 | id = be16_to_cpu(tail->uid); | |
79bda4d5 | 76 | if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETUID)) |
1da177e4 | 77 | inode->i_uid = sbi->s_uid; |
79bda4d5 | 78 | else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS)) |
8fed10be | 79 | i_uid_write(inode, 0); |
1da177e4 | 80 | else |
8fed10be | 81 | i_uid_write(inode, id); |
1da177e4 LT |
82 | |
83 | id = be16_to_cpu(tail->gid); | |
79bda4d5 | 84 | if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETGID)) |
1da177e4 | 85 | inode->i_gid = sbi->s_gid; |
79bda4d5 | 86 | else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS)) |
8fed10be | 87 | i_gid_write(inode, 0); |
1da177e4 | 88 | else |
8fed10be | 89 | i_gid_write(inode, id); |
1da177e4 LT |
90 | |
91 | switch (be32_to_cpu(tail->stype)) { | |
92 | case ST_ROOT: | |
93 | inode->i_uid = sbi->s_uid; | |
94 | inode->i_gid = sbi->s_gid; | |
95 | /* fall through */ | |
96 | case ST_USERDIR: | |
97 | if (be32_to_cpu(tail->stype) == ST_USERDIR || | |
79bda4d5 | 98 | affs_test_opt(sbi->s_flags, SF_SETMODE)) { |
1da177e4 LT |
99 | if (inode->i_mode & S_IRUSR) |
100 | inode->i_mode |= S_IXUSR; | |
101 | if (inode->i_mode & S_IRGRP) | |
102 | inode->i_mode |= S_IXGRP; | |
103 | if (inode->i_mode & S_IROTH) | |
104 | inode->i_mode |= S_IXOTH; | |
105 | inode->i_mode |= S_IFDIR; | |
106 | } else | |
107 | inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR; | |
1da177e4 LT |
108 | /* Maybe it should be controlled by mount parameter? */ |
109 | //inode->i_mode |= S_ISVTX; | |
110 | inode->i_op = &affs_dir_inode_operations; | |
111 | inode->i_fop = &affs_dir_operations; | |
112 | break; | |
113 | case ST_LINKDIR: | |
114 | #if 0 | |
115 | affs_warning(sb, "read_inode", "inode is LINKDIR"); | |
116 | goto bad_inode; | |
117 | #else | |
118 | inode->i_mode |= S_IFDIR; | |
c765d479 | 119 | /* ... and leave ->i_op and ->i_fop pointing to empty */ |
1da177e4 LT |
120 | break; |
121 | #endif | |
122 | case ST_LINKFILE: | |
123 | affs_warning(sb, "read_inode", "inode is LINKFILE"); | |
124 | goto bad_inode; | |
125 | case ST_FILE: | |
126 | size = be32_to_cpu(tail->size); | |
127 | inode->i_mode |= S_IFREG; | |
128 | AFFS_I(inode)->mmu_private = inode->i_size = size; | |
129 | if (inode->i_size) { | |
130 | AFFS_I(inode)->i_blkcnt = (size - 1) / | |
131 | sbi->s_data_blksize + 1; | |
132 | AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) / | |
133 | sbi->s_hashsize + 1; | |
134 | } | |
135 | if (tail->link_chain) | |
bfe86848 | 136 | set_nlink(inode, 2); |
79bda4d5 | 137 | inode->i_mapping->a_ops = affs_test_opt(sbi->s_flags, SF_OFS) ? |
a0016ff2 | 138 | &affs_aops_ofs : &affs_aops; |
1da177e4 LT |
139 | inode->i_op = &affs_file_inode_operations; |
140 | inode->i_fop = &affs_file_operations; | |
141 | break; | |
142 | case ST_SOFTLINK: | |
f1bf9072 | 143 | inode->i_size = strlen((char *)AFFS_HEAD(bh)->table); |
1da177e4 | 144 | inode->i_mode |= S_IFLNK; |
21fc61c7 | 145 | inode_nohighmem(inode); |
1da177e4 LT |
146 | inode->i_op = &affs_symlink_inode_operations; |
147 | inode->i_data.a_ops = &affs_symlink_aops; | |
148 | break; | |
149 | } | |
150 | ||
151 | inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec | |
152 | = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) + | |
153 | be32_to_cpu(tail->change.mins) * 60 + | |
154 | be32_to_cpu(tail->change.ticks) / 50 + | |
155 | ((8 * 365 + 2) * 24 * 60 * 60)) + | |
156 | sys_tz.tz_minuteswest * 60; | |
157 | inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0; | |
158 | affs_brelse(bh); | |
210f8559 DH |
159 | unlock_new_inode(inode); |
160 | return inode; | |
1da177e4 LT |
161 | |
162 | bad_inode: | |
1da177e4 | 163 | affs_brelse(bh); |
210f8559 DH |
164 | iget_failed(inode); |
165 | return ERR_PTR(-EIO); | |
1da177e4 LT |
166 | } |
167 | ||
168 | int | |
a9185b41 | 169 | affs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 LT |
170 | { |
171 | struct super_block *sb = inode->i_sb; | |
172 | struct buffer_head *bh; | |
173 | struct affs_tail *tail; | |
174 | uid_t uid; | |
175 | gid_t gid; | |
176 | ||
9606d9aa | 177 | pr_debug("write_inode(%lu)\n", inode->i_ino); |
1da177e4 LT |
178 | |
179 | if (!inode->i_nlink) | |
180 | // possibly free block | |
181 | return 0; | |
182 | bh = affs_bread(sb, inode->i_ino); | |
183 | if (!bh) { | |
184 | affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino); | |
185 | return -EIO; | |
186 | } | |
187 | tail = AFFS_TAIL(sb, bh); | |
188 | if (tail->stype == cpu_to_be32(ST_ROOT)) { | |
c1618208 FF |
189 | affs_secs_to_datestamp(inode->i_mtime.tv_sec, |
190 | &AFFS_ROOT_TAIL(sb, bh)->root_change); | |
1da177e4 LT |
191 | } else { |
192 | tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect); | |
193 | tail->size = cpu_to_be32(inode->i_size); | |
c1618208 | 194 | affs_secs_to_datestamp(inode->i_mtime.tv_sec, &tail->change); |
1da177e4 | 195 | if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) { |
8fed10be EB |
196 | uid = i_uid_read(inode); |
197 | gid = i_gid_read(inode); | |
79bda4d5 | 198 | if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_MUFS)) { |
8fed10be EB |
199 | if (uid == 0 || uid == 0xFFFF) |
200 | uid = uid ^ ~0; | |
201 | if (gid == 0 || gid == 0xFFFF) | |
202 | gid = gid ^ ~0; | |
1da177e4 | 203 | } |
79bda4d5 | 204 | if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETUID)) |
1da177e4 | 205 | tail->uid = cpu_to_be16(uid); |
79bda4d5 | 206 | if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETGID)) |
1da177e4 LT |
207 | tail->gid = cpu_to_be16(gid); |
208 | } | |
209 | } | |
210 | affs_fix_checksum(sb, bh); | |
211 | mark_buffer_dirty_inode(bh, inode); | |
212 | affs_brelse(bh); | |
213 | affs_free_prealloc(inode); | |
214 | return 0; | |
215 | } | |
216 | ||
217 | int | |
218 | affs_notify_change(struct dentry *dentry, struct iattr *attr) | |
219 | { | |
2b0143b5 | 220 | struct inode *inode = d_inode(dentry); |
1da177e4 LT |
221 | int error; |
222 | ||
9606d9aa | 223 | pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid); |
1da177e4 | 224 | |
31051c85 | 225 | error = setattr_prepare(dentry, attr); |
1da177e4 LT |
226 | if (error) |
227 | goto out; | |
228 | ||
a0016ff2 | 229 | if (((attr->ia_valid & ATTR_UID) && |
79bda4d5 | 230 | affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETUID)) || |
a0016ff2 | 231 | ((attr->ia_valid & ATTR_GID) && |
79bda4d5 | 232 | affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETGID)) || |
1da177e4 | 233 | ((attr->ia_valid & ATTR_MODE) && |
a0016ff2 FF |
234 | (AFFS_SB(inode->i_sb)->s_flags & |
235 | (AFFS_MOUNT_SF_SETMODE | AFFS_MOUNT_SF_IMMUTABLE)))) { | |
79bda4d5 | 236 | if (!affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_QUIET)) |
1da177e4 LT |
237 | error = -EPERM; |
238 | goto out; | |
239 | } | |
240 | ||
1025774c CH |
241 | if ((attr->ia_valid & ATTR_SIZE) && |
242 | attr->ia_size != i_size_read(inode)) { | |
1dc1834f | 243 | error = inode_newsize_ok(inode, attr->ia_size); |
1025774c CH |
244 | if (error) |
245 | return error; | |
1dc1834f MS |
246 | |
247 | truncate_setsize(inode, attr->ia_size); | |
248 | affs_truncate(inode); | |
1025774c CH |
249 | } |
250 | ||
251 | setattr_copy(inode, attr); | |
252 | mark_inode_dirty(inode); | |
253 | ||
254 | if (attr->ia_valid & ATTR_MODE) | |
c1618208 | 255 | affs_mode_to_prot(inode); |
1da177e4 LT |
256 | out: |
257 | return error; | |
258 | } | |
259 | ||
1da177e4 | 260 | void |
f053ddde | 261 | affs_evict_inode(struct inode *inode) |
1da177e4 | 262 | { |
dca3c336 | 263 | unsigned long cache_page; |
9606d9aa FF |
264 | pr_debug("evict_inode(ino=%lu, nlink=%u)\n", |
265 | inode->i_ino, inode->i_nlink); | |
91b0abe3 | 266 | truncate_inode_pages_final(&inode->i_data); |
1da177e4 | 267 | |
f053ddde AV |
268 | if (!inode->i_nlink) { |
269 | inode->i_size = 0; | |
270 | affs_truncate(inode); | |
271 | } | |
dca3c336 | 272 | |
f053ddde | 273 | invalidate_inode_buffers(inode); |
dbd5768f | 274 | clear_inode(inode); |
dca3c336 RZ |
275 | affs_free_prealloc(inode); |
276 | cache_page = (unsigned long)AFFS_I(inode)->i_lc; | |
1da177e4 | 277 | if (cache_page) { |
9606d9aa | 278 | pr_debug("freeing ext cache\n"); |
1da177e4 LT |
279 | AFFS_I(inode)->i_lc = NULL; |
280 | AFFS_I(inode)->i_ac = NULL; | |
281 | free_page(cache_page); | |
282 | } | |
283 | affs_brelse(AFFS_I(inode)->i_ext_bh); | |
284 | AFFS_I(inode)->i_ext_last = ~1; | |
285 | AFFS_I(inode)->i_ext_bh = NULL; | |
f053ddde AV |
286 | |
287 | if (!inode->i_nlink) | |
288 | affs_free_block(inode->i_sb, inode->i_ino); | |
1da177e4 LT |
289 | } |
290 | ||
291 | struct inode * | |
292 | affs_new_inode(struct inode *dir) | |
293 | { | |
294 | struct super_block *sb = dir->i_sb; | |
295 | struct inode *inode; | |
296 | u32 block; | |
297 | struct buffer_head *bh; | |
298 | ||
299 | if (!(inode = new_inode(sb))) | |
300 | goto err_inode; | |
301 | ||
302 | if (!(block = affs_alloc_block(dir, dir->i_ino))) | |
303 | goto err_block; | |
304 | ||
305 | bh = affs_getzeroblk(sb, block); | |
306 | if (!bh) | |
307 | goto err_bh; | |
308 | mark_buffer_dirty_inode(bh, inode); | |
309 | affs_brelse(bh); | |
310 | ||
21559981 DH |
311 | inode->i_uid = current_fsuid(); |
312 | inode->i_gid = current_fsgid(); | |
1da177e4 | 313 | inode->i_ino = block; |
bfe86848 | 314 | set_nlink(inode, 1); |
02027d42 | 315 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
dca3c336 | 316 | atomic_set(&AFFS_I(inode)->i_opencnt, 0); |
1da177e4 LT |
317 | AFFS_I(inode)->i_blkcnt = 0; |
318 | AFFS_I(inode)->i_lc = NULL; | |
319 | AFFS_I(inode)->i_lc_size = 0; | |
320 | AFFS_I(inode)->i_lc_shift = 0; | |
321 | AFFS_I(inode)->i_lc_mask = 0; | |
322 | AFFS_I(inode)->i_ac = NULL; | |
323 | AFFS_I(inode)->i_ext_bh = NULL; | |
324 | AFFS_I(inode)->mmu_private = 0; | |
325 | AFFS_I(inode)->i_protect = 0; | |
326 | AFFS_I(inode)->i_lastalloc = 0; | |
327 | AFFS_I(inode)->i_pa_cnt = 0; | |
328 | AFFS_I(inode)->i_extcnt = 1; | |
329 | AFFS_I(inode)->i_ext_last = ~1; | |
330 | ||
331 | insert_inode_hash(inode); | |
332 | ||
333 | return inode; | |
334 | ||
335 | err_bh: | |
336 | affs_free_block(sb, block); | |
337 | err_block: | |
338 | iput(inode); | |
339 | err_inode: | |
340 | return NULL; | |
341 | } | |
342 | ||
343 | /* | |
344 | * Add an entry to a directory. Create the header block | |
345 | * and insert it into the hash table. | |
346 | */ | |
347 | ||
348 | int | |
349 | affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type) | |
350 | { | |
351 | struct super_block *sb = dir->i_sb; | |
352 | struct buffer_head *inode_bh = NULL; | |
78f444f6 | 353 | struct buffer_head *bh; |
1da177e4 LT |
354 | u32 block = 0; |
355 | int retval; | |
356 | ||
08fe100d GU |
357 | pr_debug("%s(dir=%lu, inode=%lu, \"%pd\", type=%d)\n", __func__, |
358 | dir->i_ino, inode->i_ino, dentry, type); | |
1da177e4 LT |
359 | |
360 | retval = -EIO; | |
361 | bh = affs_bread(sb, inode->i_ino); | |
362 | if (!bh) | |
363 | goto done; | |
364 | ||
365 | affs_lock_link(inode); | |
366 | switch (type) { | |
367 | case ST_LINKFILE: | |
368 | case ST_LINKDIR: | |
1da177e4 LT |
369 | retval = -ENOSPC; |
370 | block = affs_alloc_block(dir, dir->i_ino); | |
371 | if (!block) | |
372 | goto err; | |
373 | retval = -EIO; | |
dca3c336 | 374 | inode_bh = bh; |
1da177e4 LT |
375 | bh = affs_getzeroblk(sb, block); |
376 | if (!bh) | |
377 | goto err; | |
378 | break; | |
379 | default: | |
380 | break; | |
381 | } | |
382 | ||
383 | AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT); | |
384 | AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr); | |
385 | affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry); | |
386 | AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type); | |
387 | AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino); | |
388 | ||
389 | if (inode_bh) { | |
390 | __be32 chain; | |
391 | chain = AFFS_TAIL(sb, inode_bh)->link_chain; | |
392 | AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino); | |
393 | AFFS_TAIL(sb, bh)->link_chain = chain; | |
394 | AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block); | |
395 | affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain)); | |
396 | mark_buffer_dirty_inode(inode_bh, inode); | |
bfe86848 | 397 | set_nlink(inode, 2); |
7de9c6ee | 398 | ihold(inode); |
1da177e4 LT |
399 | } |
400 | affs_fix_checksum(sb, bh); | |
401 | mark_buffer_dirty_inode(bh, inode); | |
402 | dentry->d_fsdata = (void *)(long)bh->b_blocknr; | |
403 | ||
404 | affs_lock_dir(dir); | |
405 | retval = affs_insert_hash(dir, bh); | |
406 | mark_buffer_dirty_inode(bh, inode); | |
407 | affs_unlock_dir(dir); | |
408 | affs_unlock_link(inode); | |
409 | ||
410 | d_instantiate(dentry, inode); | |
411 | done: | |
412 | affs_brelse(inode_bh); | |
413 | affs_brelse(bh); | |
414 | return retval; | |
415 | err: | |
416 | if (block) | |
417 | affs_free_block(sb, block); | |
418 | affs_unlock_link(inode); | |
419 | goto done; | |
420 | } |