Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/hfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1995-1997 Paul H. Hargrove | |
5 | * (C) 2003 Ardis Technologies <roman@ardistech.com> | |
6 | * This file may be distributed under the terms of the GNU General Public License. | |
7 | * | |
8 | * This file contains inode-related functions which do not depend on | |
9 | * which scheme is being used to represent forks. | |
10 | * | |
11 | * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds | |
12 | */ | |
13 | ||
14 | #include <linux/pagemap.h> | |
1da177e4 | 15 | #include <linux/mpage.h> |
e8edc6e0 | 16 | #include <linux/sched.h> |
1da177e4 LT |
17 | |
18 | #include "hfs_fs.h" | |
19 | #include "btree.h" | |
20 | ||
4b6f5d20 | 21 | static const struct file_operations hfs_file_operations; |
92e1d5be | 22 | static const struct inode_operations hfs_file_inode_operations; |
1da177e4 LT |
23 | |
24 | /*================ Variable-like macros ================*/ | |
25 | ||
26 | #define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO) | |
27 | ||
28 | static int hfs_writepage(struct page *page, struct writeback_control *wbc) | |
29 | { | |
30 | return block_write_full_page(page, hfs_get_block, wbc); | |
31 | } | |
32 | ||
33 | static int hfs_readpage(struct file *file, struct page *page) | |
34 | { | |
35 | return block_read_full_page(page, hfs_get_block); | |
36 | } | |
37 | ||
c8cf464b MS |
38 | static void hfs_write_failed(struct address_space *mapping, loff_t to) |
39 | { | |
40 | struct inode *inode = mapping->host; | |
41 | ||
42 | if (to > inode->i_size) { | |
43 | truncate_pagecache(inode, to, inode->i_size); | |
44 | hfs_file_truncate(inode); | |
45 | } | |
46 | } | |
47 | ||
7903d9ee NP |
48 | static int hfs_write_begin(struct file *file, struct address_space *mapping, |
49 | loff_t pos, unsigned len, unsigned flags, | |
50 | struct page **pagep, void **fsdata) | |
1da177e4 | 51 | { |
282dc178 CH |
52 | int ret; |
53 | ||
7903d9ee | 54 | *pagep = NULL; |
282dc178 | 55 | ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, |
7903d9ee NP |
56 | hfs_get_block, |
57 | &HFS_I(mapping->host)->phys_size); | |
c8cf464b MS |
58 | if (unlikely(ret)) |
59 | hfs_write_failed(mapping, pos + len); | |
282dc178 CH |
60 | |
61 | return ret; | |
1da177e4 LT |
62 | } |
63 | ||
64 | static sector_t hfs_bmap(struct address_space *mapping, sector_t block) | |
65 | { | |
66 | return generic_block_bmap(mapping, block, hfs_get_block); | |
67 | } | |
68 | ||
27496a8c | 69 | static int hfs_releasepage(struct page *page, gfp_t mask) |
1da177e4 LT |
70 | { |
71 | struct inode *inode = page->mapping->host; | |
72 | struct super_block *sb = inode->i_sb; | |
73 | struct hfs_btree *tree; | |
74 | struct hfs_bnode *node; | |
75 | u32 nidx; | |
76 | int i, res = 1; | |
77 | ||
78 | switch (inode->i_ino) { | |
79 | case HFS_EXT_CNID: | |
80 | tree = HFS_SB(sb)->ext_tree; | |
81 | break; | |
82 | case HFS_CAT_CNID: | |
83 | tree = HFS_SB(sb)->cat_tree; | |
84 | break; | |
85 | default: | |
86 | BUG(); | |
87 | return 0; | |
88 | } | |
eb2e5f45 DA |
89 | |
90 | if (!tree) | |
91 | return 0; | |
92 | ||
1da177e4 LT |
93 | if (tree->node_size >= PAGE_CACHE_SIZE) { |
94 | nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT); | |
95 | spin_lock(&tree->hash_lock); | |
96 | node = hfs_bnode_findhash(tree, nidx); | |
97 | if (!node) | |
98 | ; | |
99 | else if (atomic_read(&node->refcnt)) | |
100 | res = 0; | |
101 | if (res && node) { | |
102 | hfs_bnode_unhash(node); | |
103 | hfs_bnode_free(node); | |
104 | } | |
105 | spin_unlock(&tree->hash_lock); | |
106 | } else { | |
107 | nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift); | |
108 | i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift); | |
109 | spin_lock(&tree->hash_lock); | |
110 | do { | |
111 | node = hfs_bnode_findhash(tree, nidx++); | |
112 | if (!node) | |
113 | continue; | |
114 | if (atomic_read(&node->refcnt)) { | |
115 | res = 0; | |
116 | break; | |
117 | } | |
118 | hfs_bnode_unhash(node); | |
119 | hfs_bnode_free(node); | |
120 | } while (--i && nidx < tree->node_count); | |
121 | spin_unlock(&tree->hash_lock); | |
122 | } | |
1da177e4 LT |
123 | return res ? try_to_free_buffers(page) : 0; |
124 | } | |
125 | ||
1da177e4 LT |
126 | static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb, |
127 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
128 | { | |
129 | struct file *file = iocb->ki_filp; | |
c8cf464b | 130 | struct address_space *mapping = file->f_mapping; |
496ad9aa | 131 | struct inode *inode = file_inode(file)->i_mapping->host; |
eafdc7d1 | 132 | ssize_t ret; |
1da177e4 | 133 | |
aacfc19c CH |
134 | ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, |
135 | hfs_get_block); | |
eafdc7d1 CH |
136 | |
137 | /* | |
138 | * In case of error extending write may have instantiated a few | |
139 | * blocks outside i_size. Trim these off again. | |
140 | */ | |
141 | if (unlikely((rw & WRITE) && ret < 0)) { | |
142 | loff_t isize = i_size_read(inode); | |
143 | loff_t end = offset + iov_length(iov, nr_segs); | |
144 | ||
145 | if (end > isize) | |
c8cf464b | 146 | hfs_write_failed(mapping, end); |
eafdc7d1 CH |
147 | } |
148 | ||
149 | return ret; | |
1da177e4 LT |
150 | } |
151 | ||
152 | static int hfs_writepages(struct address_space *mapping, | |
153 | struct writeback_control *wbc) | |
154 | { | |
155 | return mpage_writepages(mapping, wbc, hfs_get_block); | |
156 | } | |
157 | ||
f5e54d6e | 158 | const struct address_space_operations hfs_btree_aops = { |
1da177e4 LT |
159 | .readpage = hfs_readpage, |
160 | .writepage = hfs_writepage, | |
7903d9ee NP |
161 | .write_begin = hfs_write_begin, |
162 | .write_end = generic_write_end, | |
1da177e4 LT |
163 | .bmap = hfs_bmap, |
164 | .releasepage = hfs_releasepage, | |
165 | }; | |
166 | ||
f5e54d6e | 167 | const struct address_space_operations hfs_aops = { |
1da177e4 LT |
168 | .readpage = hfs_readpage, |
169 | .writepage = hfs_writepage, | |
7903d9ee NP |
170 | .write_begin = hfs_write_begin, |
171 | .write_end = generic_write_end, | |
1da177e4 LT |
172 | .bmap = hfs_bmap, |
173 | .direct_IO = hfs_direct_IO, | |
174 | .writepages = hfs_writepages, | |
175 | }; | |
176 | ||
177 | /* | |
178 | * hfs_new_inode | |
179 | */ | |
e021d7b7 | 180 | struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, umode_t mode) |
1da177e4 LT |
181 | { |
182 | struct super_block *sb = dir->i_sb; | |
183 | struct inode *inode = new_inode(sb); | |
184 | if (!inode) | |
185 | return NULL; | |
186 | ||
39f8d472 | 187 | mutex_init(&HFS_I(inode)->extents_lock); |
1da177e4 | 188 | INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); |
328b9227 | 189 | hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name); |
1da177e4 LT |
190 | inode->i_ino = HFS_SB(sb)->next_id++; |
191 | inode->i_mode = mode; | |
94c9a5ee DH |
192 | inode->i_uid = current_fsuid(); |
193 | inode->i_gid = current_fsgid(); | |
bfe86848 | 194 | set_nlink(inode, 1); |
1da177e4 | 195 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; |
1da177e4 LT |
196 | HFS_I(inode)->flags = 0; |
197 | HFS_I(inode)->rsrc_inode = NULL; | |
198 | HFS_I(inode)->fs_blocks = 0; | |
199 | if (S_ISDIR(mode)) { | |
200 | inode->i_size = 2; | |
201 | HFS_SB(sb)->folder_count++; | |
202 | if (dir->i_ino == HFS_ROOT_CNID) | |
203 | HFS_SB(sb)->root_dirs++; | |
204 | inode->i_op = &hfs_dir_inode_operations; | |
205 | inode->i_fop = &hfs_dir_operations; | |
206 | inode->i_mode |= S_IRWXUGO; | |
207 | inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask; | |
208 | } else if (S_ISREG(mode)) { | |
209 | HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; | |
210 | HFS_SB(sb)->file_count++; | |
211 | if (dir->i_ino == HFS_ROOT_CNID) | |
212 | HFS_SB(sb)->root_files++; | |
213 | inode->i_op = &hfs_file_inode_operations; | |
214 | inode->i_fop = &hfs_file_operations; | |
215 | inode->i_mapping->a_ops = &hfs_aops; | |
216 | inode->i_mode |= S_IRUGO|S_IXUGO; | |
217 | if (mode & S_IWUSR) | |
218 | inode->i_mode |= S_IWUGO; | |
219 | inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask; | |
220 | HFS_I(inode)->phys_size = 0; | |
221 | HFS_I(inode)->alloc_blocks = 0; | |
222 | HFS_I(inode)->first_blocks = 0; | |
223 | HFS_I(inode)->cached_start = 0; | |
224 | HFS_I(inode)->cached_blocks = 0; | |
225 | memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec)); | |
226 | memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec)); | |
227 | } | |
228 | insert_inode_hash(inode); | |
229 | mark_inode_dirty(inode); | |
230 | set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); | |
5687b578 | 231 | hfs_mark_mdb_dirty(sb); |
1da177e4 LT |
232 | |
233 | return inode; | |
234 | } | |
235 | ||
236 | void hfs_delete_inode(struct inode *inode) | |
237 | { | |
238 | struct super_block *sb = inode->i_sb; | |
239 | ||
240 | dprint(DBG_INODE, "delete_inode: %lu\n", inode->i_ino); | |
241 | if (S_ISDIR(inode->i_mode)) { | |
242 | HFS_SB(sb)->folder_count--; | |
243 | if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) | |
244 | HFS_SB(sb)->root_dirs--; | |
245 | set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); | |
5687b578 | 246 | hfs_mark_mdb_dirty(sb); |
1da177e4 LT |
247 | return; |
248 | } | |
249 | HFS_SB(sb)->file_count--; | |
250 | if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) | |
251 | HFS_SB(sb)->root_files--; | |
252 | if (S_ISREG(inode->i_mode)) { | |
253 | if (!inode->i_nlink) { | |
254 | inode->i_size = 0; | |
255 | hfs_file_truncate(inode); | |
256 | } | |
257 | } | |
258 | set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); | |
5687b578 | 259 | hfs_mark_mdb_dirty(sb); |
1da177e4 LT |
260 | } |
261 | ||
262 | void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, | |
263 | __be32 __log_size, __be32 phys_size, u32 clump_size) | |
264 | { | |
265 | struct super_block *sb = inode->i_sb; | |
266 | u32 log_size = be32_to_cpu(__log_size); | |
267 | u16 count; | |
268 | int i; | |
269 | ||
270 | memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec)); | |
271 | for (count = 0, i = 0; i < 3; i++) | |
272 | count += be16_to_cpu(ext[i].count); | |
273 | HFS_I(inode)->first_blocks = count; | |
274 | ||
275 | inode->i_size = HFS_I(inode)->phys_size = log_size; | |
276 | HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
277 | inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits); | |
278 | HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) / | |
279 | HFS_SB(sb)->alloc_blksz; | |
280 | HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz; | |
281 | if (!HFS_I(inode)->clump_blocks) | |
282 | HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; | |
283 | } | |
284 | ||
285 | struct hfs_iget_data { | |
286 | struct hfs_cat_key *key; | |
287 | hfs_cat_rec *rec; | |
288 | }; | |
289 | ||
290 | static int hfs_test_inode(struct inode *inode, void *data) | |
291 | { | |
292 | struct hfs_iget_data *idata = data; | |
293 | hfs_cat_rec *rec; | |
294 | ||
295 | rec = idata->rec; | |
296 | switch (rec->type) { | |
297 | case HFS_CDR_DIR: | |
298 | return inode->i_ino == be32_to_cpu(rec->dir.DirID); | |
299 | case HFS_CDR_FIL: | |
300 | return inode->i_ino == be32_to_cpu(rec->file.FlNum); | |
301 | default: | |
302 | BUG(); | |
303 | return 1; | |
304 | } | |
305 | } | |
306 | ||
307 | /* | |
308 | * hfs_read_inode | |
309 | */ | |
310 | static int hfs_read_inode(struct inode *inode, void *data) | |
311 | { | |
312 | struct hfs_iget_data *idata = data; | |
313 | struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); | |
314 | hfs_cat_rec *rec; | |
315 | ||
316 | HFS_I(inode)->flags = 0; | |
317 | HFS_I(inode)->rsrc_inode = NULL; | |
39f8d472 | 318 | mutex_init(&HFS_I(inode)->extents_lock); |
1da177e4 LT |
319 | INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); |
320 | ||
321 | /* Initialize the inode */ | |
322 | inode->i_uid = hsb->s_uid; | |
323 | inode->i_gid = hsb->s_gid; | |
bfe86848 | 324 | set_nlink(inode, 1); |
1da177e4 LT |
325 | |
326 | if (idata->key) | |
327 | HFS_I(inode)->cat_key = *idata->key; | |
328 | else | |
329 | HFS_I(inode)->flags |= HFS_FLG_RSRC; | |
330 | HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60; | |
331 | ||
332 | rec = idata->rec; | |
333 | switch (rec->type) { | |
334 | case HFS_CDR_FIL: | |
335 | if (!HFS_IS_RSRC(inode)) { | |
336 | hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen, | |
337 | rec->file.PyLen, be16_to_cpu(rec->file.ClpSize)); | |
338 | } else { | |
339 | hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen, | |
340 | rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize)); | |
341 | } | |
342 | ||
343 | inode->i_ino = be32_to_cpu(rec->file.FlNum); | |
344 | inode->i_mode = S_IRUGO | S_IXUGO; | |
345 | if (!(rec->file.Flags & HFS_FIL_LOCK)) | |
346 | inode->i_mode |= S_IWUGO; | |
347 | inode->i_mode &= ~hsb->s_file_umask; | |
348 | inode->i_mode |= S_IFREG; | |
349 | inode->i_ctime = inode->i_atime = inode->i_mtime = | |
350 | hfs_m_to_utime(rec->file.MdDat); | |
351 | inode->i_op = &hfs_file_inode_operations; | |
352 | inode->i_fop = &hfs_file_operations; | |
353 | inode->i_mapping->a_ops = &hfs_aops; | |
354 | break; | |
355 | case HFS_CDR_DIR: | |
356 | inode->i_ino = be32_to_cpu(rec->dir.DirID); | |
357 | inode->i_size = be16_to_cpu(rec->dir.Val) + 2; | |
358 | HFS_I(inode)->fs_blocks = 0; | |
359 | inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask); | |
360 | inode->i_ctime = inode->i_atime = inode->i_mtime = | |
361 | hfs_m_to_utime(rec->dir.MdDat); | |
362 | inode->i_op = &hfs_dir_inode_operations; | |
363 | inode->i_fop = &hfs_dir_operations; | |
364 | break; | |
365 | default: | |
366 | make_bad_inode(inode); | |
367 | } | |
368 | return 0; | |
369 | } | |
370 | ||
371 | /* | |
372 | * __hfs_iget() | |
373 | * | |
374 | * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in | |
375 | * the catalog B-tree and the 'type' of the desired file return the | |
376 | * inode for that file/directory or NULL. Note that 'type' indicates | |
377 | * whether we want the actual file or directory, or the corresponding | |
378 | * metadata (AppleDouble header file or CAP metadata file). | |
379 | */ | |
380 | struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec) | |
381 | { | |
382 | struct hfs_iget_data data = { key, rec }; | |
383 | struct inode *inode; | |
384 | u32 cnid; | |
385 | ||
386 | switch (rec->type) { | |
387 | case HFS_CDR_DIR: | |
388 | cnid = be32_to_cpu(rec->dir.DirID); | |
389 | break; | |
390 | case HFS_CDR_FIL: | |
391 | cnid = be32_to_cpu(rec->file.FlNum); | |
392 | break; | |
393 | default: | |
394 | return NULL; | |
395 | } | |
396 | inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data); | |
397 | if (inode && (inode->i_state & I_NEW)) | |
398 | unlock_new_inode(inode); | |
399 | return inode; | |
400 | } | |
401 | ||
402 | void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext, | |
403 | __be32 *log_size, __be32 *phys_size) | |
404 | { | |
405 | memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec)); | |
406 | ||
407 | if (log_size) | |
408 | *log_size = cpu_to_be32(inode->i_size); | |
409 | if (phys_size) | |
410 | *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks * | |
411 | HFS_SB(inode->i_sb)->alloc_blksz); | |
412 | } | |
413 | ||
a9185b41 | 414 | int hfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 LT |
415 | { |
416 | struct inode *main_inode = inode; | |
417 | struct hfs_find_data fd; | |
418 | hfs_cat_rec rec; | |
419 | ||
420 | dprint(DBG_INODE, "hfs_write_inode: %lu\n", inode->i_ino); | |
421 | hfs_ext_write_extent(inode); | |
422 | ||
423 | if (inode->i_ino < HFS_FIRSTUSER_CNID) { | |
424 | switch (inode->i_ino) { | |
425 | case HFS_ROOT_CNID: | |
426 | break; | |
427 | case HFS_EXT_CNID: | |
428 | hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree); | |
429 | return 0; | |
430 | case HFS_CAT_CNID: | |
431 | hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree); | |
432 | return 0; | |
433 | default: | |
434 | BUG(); | |
435 | return -EIO; | |
436 | } | |
437 | } | |
438 | ||
439 | if (HFS_IS_RSRC(inode)) | |
440 | main_inode = HFS_I(inode)->rsrc_inode; | |
441 | ||
442 | if (!main_inode->i_nlink) | |
443 | return 0; | |
444 | ||
445 | if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd)) | |
446 | /* panic? */ | |
447 | return -EIO; | |
448 | ||
449 | fd.search_key->cat = HFS_I(main_inode)->cat_key; | |
450 | if (hfs_brec_find(&fd)) | |
451 | /* panic? */ | |
452 | goto out; | |
453 | ||
454 | if (S_ISDIR(main_inode->i_mode)) { | |
455 | if (fd.entrylength < sizeof(struct hfs_cat_dir)) | |
456 | /* panic? */; | |
457 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, | |
458 | sizeof(struct hfs_cat_dir)); | |
459 | if (rec.type != HFS_CDR_DIR || | |
460 | be32_to_cpu(rec.dir.DirID) != inode->i_ino) { | |
461 | } | |
462 | ||
463 | rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime); | |
464 | rec.dir.Val = cpu_to_be16(inode->i_size - 2); | |
465 | ||
466 | hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, | |
467 | sizeof(struct hfs_cat_dir)); | |
468 | } else if (HFS_IS_RSRC(inode)) { | |
469 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, | |
470 | sizeof(struct hfs_cat_file)); | |
471 | hfs_inode_write_fork(inode, rec.file.RExtRec, | |
472 | &rec.file.RLgLen, &rec.file.RPyLen); | |
473 | hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, | |
474 | sizeof(struct hfs_cat_file)); | |
475 | } else { | |
476 | if (fd.entrylength < sizeof(struct hfs_cat_file)) | |
477 | /* panic? */; | |
478 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, | |
479 | sizeof(struct hfs_cat_file)); | |
480 | if (rec.type != HFS_CDR_FIL || | |
481 | be32_to_cpu(rec.file.FlNum) != inode->i_ino) { | |
482 | } | |
483 | ||
484 | if (inode->i_mode & S_IWUSR) | |
485 | rec.file.Flags &= ~HFS_FIL_LOCK; | |
486 | else | |
487 | rec.file.Flags |= HFS_FIL_LOCK; | |
488 | hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen); | |
489 | rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime); | |
490 | ||
491 | hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, | |
492 | sizeof(struct hfs_cat_file)); | |
493 | } | |
494 | out: | |
495 | hfs_find_exit(&fd); | |
496 | return 0; | |
497 | } | |
498 | ||
499 | static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry, | |
00cd8dd3 | 500 | unsigned int flags) |
1da177e4 LT |
501 | { |
502 | struct inode *inode = NULL; | |
503 | hfs_cat_rec rec; | |
504 | struct hfs_find_data fd; | |
505 | int res; | |
506 | ||
507 | if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) | |
508 | goto out; | |
509 | ||
510 | inode = HFS_I(dir)->rsrc_inode; | |
511 | if (inode) | |
512 | goto out; | |
513 | ||
514 | inode = new_inode(dir->i_sb); | |
515 | if (!inode) | |
516 | return ERR_PTR(-ENOMEM); | |
517 | ||
518 | hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); | |
519 | fd.search_key->cat = HFS_I(dir)->cat_key; | |
520 | res = hfs_brec_read(&fd, &rec, sizeof(rec)); | |
521 | if (!res) { | |
522 | struct hfs_iget_data idata = { NULL, &rec }; | |
523 | hfs_read_inode(inode, &idata); | |
524 | } | |
525 | hfs_find_exit(&fd); | |
526 | if (res) { | |
527 | iput(inode); | |
528 | return ERR_PTR(res); | |
529 | } | |
530 | HFS_I(inode)->rsrc_inode = dir; | |
531 | HFS_I(dir)->rsrc_inode = inode; | |
532 | igrab(dir); | |
89b0fc38 | 533 | hlist_add_fake(&inode->i_hash); |
1da177e4 LT |
534 | mark_inode_dirty(inode); |
535 | out: | |
536 | d_add(dentry, inode); | |
537 | return NULL; | |
538 | } | |
539 | ||
b57922d9 | 540 | void hfs_evict_inode(struct inode *inode) |
1da177e4 | 541 | { |
b57922d9 | 542 | truncate_inode_pages(&inode->i_data, 0); |
dbd5768f | 543 | clear_inode(inode); |
1da177e4 LT |
544 | if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) { |
545 | HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL; | |
546 | iput(HFS_I(inode)->rsrc_inode); | |
547 | } | |
548 | } | |
549 | ||
1da177e4 LT |
550 | static int hfs_file_open(struct inode *inode, struct file *file) |
551 | { | |
552 | if (HFS_IS_RSRC(inode)) | |
553 | inode = HFS_I(inode)->rsrc_inode; | |
1da177e4 LT |
554 | atomic_inc(&HFS_I(inode)->opencnt); |
555 | return 0; | |
556 | } | |
557 | ||
558 | static int hfs_file_release(struct inode *inode, struct file *file) | |
559 | { | |
560 | //struct super_block *sb = inode->i_sb; | |
561 | ||
562 | if (HFS_IS_RSRC(inode)) | |
563 | inode = HFS_I(inode)->rsrc_inode; | |
1da177e4 | 564 | if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) { |
1b1dcc1b | 565 | mutex_lock(&inode->i_mutex); |
1da177e4 LT |
566 | hfs_file_truncate(inode); |
567 | //if (inode->i_flags & S_DEAD) { | |
568 | // hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); | |
569 | // hfs_delete_inode(inode); | |
570 | //} | |
1b1dcc1b | 571 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
572 | } |
573 | return 0; | |
574 | } | |
575 | ||
576 | /* | |
577 | * hfs_notify_change() | |
578 | * | |
579 | * Based very closely on fs/msdos/inode.c by Werner Almesberger | |
580 | * | |
581 | * This is the notify_change() field in the super_operations structure | |
582 | * for HFS file systems. The purpose is to take that changes made to | |
583 | * an inode and apply then in a filesystem-dependent manner. In this | |
584 | * case the process has a few of tasks to do: | |
585 | * 1) prevent changes to the i_uid and i_gid fields. | |
586 | * 2) map file permissions to the closest allowable permissions | |
587 | * 3) Since multiple Linux files can share the same on-disk inode under | |
588 | * HFS (for instance the data and resource forks of a file) a change | |
589 | * to permissions must be applied to all other in-core inodes which | |
590 | * correspond to the same HFS file. | |
591 | */ | |
592 | ||
593 | int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr) | |
594 | { | |
595 | struct inode *inode = dentry->d_inode; | |
596 | struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); | |
597 | int error; | |
598 | ||
599 | error = inode_change_ok(inode, attr); /* basic permission checks */ | |
600 | if (error) | |
601 | return error; | |
602 | ||
603 | /* no uig/gid changes and limit which mode bits can be set */ | |
604 | if (((attr->ia_valid & ATTR_UID) && | |
43b5e4cc | 605 | (!uid_eq(attr->ia_uid, hsb->s_uid))) || |
1da177e4 | 606 | ((attr->ia_valid & ATTR_GID) && |
43b5e4cc | 607 | (!gid_eq(attr->ia_gid, hsb->s_gid))) || |
1da177e4 LT |
608 | ((attr->ia_valid & ATTR_MODE) && |
609 | ((S_ISDIR(inode->i_mode) && | |
610 | (attr->ia_mode != inode->i_mode)) || | |
611 | (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) { | |
612 | return hsb->s_quiet ? 0 : error; | |
613 | } | |
614 | ||
615 | if (attr->ia_valid & ATTR_MODE) { | |
616 | /* Only the 'w' bits can ever change and only all together. */ | |
617 | if (attr->ia_mode & S_IWUSR) | |
618 | attr->ia_mode = inode->i_mode | S_IWUGO; | |
619 | else | |
620 | attr->ia_mode = inode->i_mode & ~S_IWUGO; | |
621 | attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask; | |
622 | } | |
1da177e4 | 623 | |
1025774c CH |
624 | if ((attr->ia_valid & ATTR_SIZE) && |
625 | attr->ia_size != i_size_read(inode)) { | |
562c72aa CH |
626 | inode_dio_wait(inode); |
627 | ||
c8cf464b | 628 | error = inode_newsize_ok(inode, attr->ia_size); |
1025774c CH |
629 | if (error) |
630 | return error; | |
c8cf464b MS |
631 | |
632 | truncate_setsize(inode, attr->ia_size); | |
633 | hfs_file_truncate(inode); | |
1025774c CH |
634 | } |
635 | ||
636 | setattr_copy(inode, attr); | |
637 | mark_inode_dirty(inode); | |
1da177e4 LT |
638 | return 0; |
639 | } | |
640 | ||
02c24a82 JB |
641 | static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end, |
642 | int datasync) | |
b5fc510c AV |
643 | { |
644 | struct inode *inode = filp->f_mapping->host; | |
645 | struct super_block * sb; | |
646 | int ret, err; | |
647 | ||
02c24a82 JB |
648 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
649 | if (ret) | |
650 | return ret; | |
651 | mutex_lock(&inode->i_mutex); | |
652 | ||
b5fc510c AV |
653 | /* sync the inode to buffers */ |
654 | ret = write_inode_now(inode, 0); | |
655 | ||
656 | /* sync the superblock to buffers */ | |
657 | sb = inode->i_sb; | |
43829731 | 658 | flush_delayed_work(&HFS_SB(sb)->mdb_work); |
b5fc510c AV |
659 | /* .. finally sync the buffers to disk */ |
660 | err = sync_blockdev(sb->s_bdev); | |
661 | if (!ret) | |
662 | ret = err; | |
02c24a82 | 663 | mutex_unlock(&inode->i_mutex); |
b5fc510c AV |
664 | return ret; |
665 | } | |
1da177e4 | 666 | |
4b6f5d20 | 667 | static const struct file_operations hfs_file_operations = { |
1da177e4 | 668 | .llseek = generic_file_llseek, |
543ade1f BP |
669 | .read = do_sync_read, |
670 | .aio_read = generic_file_aio_read, | |
671 | .write = do_sync_write, | |
672 | .aio_write = generic_file_aio_write, | |
1da177e4 | 673 | .mmap = generic_file_mmap, |
5ffc4ef4 | 674 | .splice_read = generic_file_splice_read, |
b5fc510c | 675 | .fsync = hfs_file_fsync, |
1da177e4 LT |
676 | .open = hfs_file_open, |
677 | .release = hfs_file_release, | |
678 | }; | |
679 | ||
92e1d5be | 680 | static const struct inode_operations hfs_file_inode_operations = { |
1da177e4 | 681 | .lookup = hfs_file_lookup, |
1da177e4 | 682 | .setattr = hfs_inode_setattr, |
1da177e4 LT |
683 | .setxattr = hfs_setxattr, |
684 | .getxattr = hfs_getxattr, | |
685 | .listxattr = hfs_listxattr, | |
686 | }; |