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> |
5b825c3a | 17 | #include <linux/cred.h> |
e2e40f2c | 18 | #include <linux/uio.h> |
b8020eff | 19 | #include <linux/xattr.h> |
3f1266f1 | 20 | #include <linux/blkdev.h> |
1da177e4 LT |
21 | |
22 | #include "hfs_fs.h" | |
23 | #include "btree.h" | |
24 | ||
4b6f5d20 | 25 | static const struct file_operations hfs_file_operations; |
92e1d5be | 26 | static const struct inode_operations hfs_file_inode_operations; |
1da177e4 LT |
27 | |
28 | /*================ Variable-like macros ================*/ | |
29 | ||
30 | #define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO) | |
31 | ||
32 | static int hfs_writepage(struct page *page, struct writeback_control *wbc) | |
33 | { | |
34 | return block_write_full_page(page, hfs_get_block, wbc); | |
35 | } | |
36 | ||
2c69e205 | 37 | static int hfs_read_folio(struct file *file, struct folio *folio) |
1da177e4 | 38 | { |
2c69e205 | 39 | return block_read_full_folio(folio, hfs_get_block); |
1da177e4 LT |
40 | } |
41 | ||
c8cf464b MS |
42 | static void hfs_write_failed(struct address_space *mapping, loff_t to) |
43 | { | |
44 | struct inode *inode = mapping->host; | |
45 | ||
46 | if (to > inode->i_size) { | |
7caef267 | 47 | truncate_pagecache(inode, inode->i_size); |
c8cf464b MS |
48 | hfs_file_truncate(inode); |
49 | } | |
50 | } | |
51 | ||
cfef1f7b MWO |
52 | int hfs_write_begin(struct file *file, struct address_space *mapping, |
53 | loff_t pos, unsigned len, struct page **pagep, void **fsdata) | |
1da177e4 | 54 | { |
282dc178 CH |
55 | int ret; |
56 | ||
7903d9ee | 57 | *pagep = NULL; |
be3bbbc5 | 58 | ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata, |
7903d9ee NP |
59 | hfs_get_block, |
60 | &HFS_I(mapping->host)->phys_size); | |
c8cf464b MS |
61 | if (unlikely(ret)) |
62 | hfs_write_failed(mapping, pos + len); | |
282dc178 CH |
63 | |
64 | return ret; | |
1da177e4 LT |
65 | } |
66 | ||
67 | static sector_t hfs_bmap(struct address_space *mapping, sector_t block) | |
68 | { | |
69 | return generic_block_bmap(mapping, block, hfs_get_block); | |
70 | } | |
71 | ||
5784f09b | 72 | static bool hfs_release_folio(struct folio *folio, gfp_t mask) |
1da177e4 | 73 | { |
5784f09b | 74 | struct inode *inode = folio->mapping->host; |
1da177e4 LT |
75 | struct super_block *sb = inode->i_sb; |
76 | struct hfs_btree *tree; | |
77 | struct hfs_bnode *node; | |
78 | u32 nidx; | |
5784f09b MWO |
79 | int i; |
80 | bool res = true; | |
1da177e4 LT |
81 | |
82 | switch (inode->i_ino) { | |
83 | case HFS_EXT_CNID: | |
84 | tree = HFS_SB(sb)->ext_tree; | |
85 | break; | |
86 | case HFS_CAT_CNID: | |
87 | tree = HFS_SB(sb)->cat_tree; | |
88 | break; | |
89 | default: | |
90 | BUG(); | |
5784f09b | 91 | return false; |
1da177e4 | 92 | } |
eb2e5f45 DA |
93 | |
94 | if (!tree) | |
5784f09b | 95 | return false; |
eb2e5f45 | 96 | |
09cbfeaf | 97 | if (tree->node_size >= PAGE_SIZE) { |
5784f09b | 98 | nidx = folio->index >> (tree->node_size_shift - PAGE_SHIFT); |
1da177e4 LT |
99 | spin_lock(&tree->hash_lock); |
100 | node = hfs_bnode_findhash(tree, nidx); | |
101 | if (!node) | |
102 | ; | |
103 | else if (atomic_read(&node->refcnt)) | |
5784f09b | 104 | res = false; |
1da177e4 LT |
105 | if (res && node) { |
106 | hfs_bnode_unhash(node); | |
107 | hfs_bnode_free(node); | |
108 | } | |
109 | spin_unlock(&tree->hash_lock); | |
110 | } else { | |
5784f09b | 111 | nidx = folio->index << (PAGE_SHIFT - tree->node_size_shift); |
09cbfeaf | 112 | i = 1 << (PAGE_SHIFT - tree->node_size_shift); |
1da177e4 LT |
113 | spin_lock(&tree->hash_lock); |
114 | do { | |
115 | node = hfs_bnode_findhash(tree, nidx++); | |
116 | if (!node) | |
117 | continue; | |
118 | if (atomic_read(&node->refcnt)) { | |
5784f09b | 119 | res = false; |
1da177e4 LT |
120 | break; |
121 | } | |
122 | hfs_bnode_unhash(node); | |
123 | hfs_bnode_free(node); | |
124 | } while (--i && nidx < tree->node_count); | |
125 | spin_unlock(&tree->hash_lock); | |
126 | } | |
68189fef | 127 | return res ? try_to_free_buffers(folio) : false; |
1da177e4 LT |
128 | } |
129 | ||
c8b8e32d | 130 | static ssize_t hfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
1da177e4 LT |
131 | { |
132 | struct file *file = iocb->ki_filp; | |
c8cf464b | 133 | struct address_space *mapping = file->f_mapping; |
93c76a3d | 134 | struct inode *inode = mapping->host; |
a6cbcd4a | 135 | size_t count = iov_iter_count(iter); |
eafdc7d1 | 136 | ssize_t ret; |
1da177e4 | 137 | |
c8b8e32d | 138 | ret = blockdev_direct_IO(iocb, inode, iter, hfs_get_block); |
eafdc7d1 CH |
139 | |
140 | /* | |
141 | * In case of error extending write may have instantiated a few | |
142 | * blocks outside i_size. Trim these off again. | |
143 | */ | |
6f673763 | 144 | if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { |
eafdc7d1 | 145 | loff_t isize = i_size_read(inode); |
c8b8e32d | 146 | loff_t end = iocb->ki_pos + count; |
eafdc7d1 CH |
147 | |
148 | if (end > isize) | |
c8cf464b | 149 | hfs_write_failed(mapping, end); |
eafdc7d1 CH |
150 | } |
151 | ||
152 | return ret; | |
1da177e4 LT |
153 | } |
154 | ||
155 | static int hfs_writepages(struct address_space *mapping, | |
156 | struct writeback_control *wbc) | |
157 | { | |
158 | return mpage_writepages(mapping, wbc, hfs_get_block); | |
159 | } | |
160 | ||
f5e54d6e | 161 | const struct address_space_operations hfs_btree_aops = { |
e621900a | 162 | .dirty_folio = block_dirty_folio, |
7ba13abb | 163 | .invalidate_folio = block_invalidate_folio, |
2c69e205 | 164 | .read_folio = hfs_read_folio, |
1da177e4 | 165 | .writepage = hfs_writepage, |
7903d9ee NP |
166 | .write_begin = hfs_write_begin, |
167 | .write_end = generic_write_end, | |
1da177e4 | 168 | .bmap = hfs_bmap, |
5784f09b | 169 | .release_folio = hfs_release_folio, |
1da177e4 LT |
170 | }; |
171 | ||
f5e54d6e | 172 | const struct address_space_operations hfs_aops = { |
e621900a | 173 | .dirty_folio = block_dirty_folio, |
7ba13abb | 174 | .invalidate_folio = block_invalidate_folio, |
2c69e205 | 175 | .read_folio = hfs_read_folio, |
7903d9ee NP |
176 | .write_begin = hfs_write_begin, |
177 | .write_end = generic_write_end, | |
1da177e4 LT |
178 | .bmap = hfs_bmap, |
179 | .direct_IO = hfs_direct_IO, | |
180 | .writepages = hfs_writepages, | |
ba195d9f | 181 | .migrate_folio = buffer_migrate_folio, |
1da177e4 LT |
182 | }; |
183 | ||
184 | /* | |
185 | * hfs_new_inode | |
186 | */ | |
71e93963 | 187 | struct inode *hfs_new_inode(struct inode *dir, const struct qstr *name, umode_t mode) |
1da177e4 LT |
188 | { |
189 | struct super_block *sb = dir->i_sb; | |
190 | struct inode *inode = new_inode(sb); | |
191 | if (!inode) | |
192 | return NULL; | |
193 | ||
39f8d472 | 194 | mutex_init(&HFS_I(inode)->extents_lock); |
1da177e4 | 195 | INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); |
9717a91b | 196 | spin_lock_init(&HFS_I(inode)->open_dir_lock); |
328b9227 | 197 | hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name); |
1da177e4 LT |
198 | inode->i_ino = HFS_SB(sb)->next_id++; |
199 | inode->i_mode = mode; | |
94c9a5ee DH |
200 | inode->i_uid = current_fsuid(); |
201 | inode->i_gid = current_fsgid(); | |
bfe86848 | 202 | set_nlink(inode, 1); |
02027d42 | 203 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
1da177e4 LT |
204 | HFS_I(inode)->flags = 0; |
205 | HFS_I(inode)->rsrc_inode = NULL; | |
206 | HFS_I(inode)->fs_blocks = 0; | |
207 | if (S_ISDIR(mode)) { | |
208 | inode->i_size = 2; | |
209 | HFS_SB(sb)->folder_count++; | |
210 | if (dir->i_ino == HFS_ROOT_CNID) | |
211 | HFS_SB(sb)->root_dirs++; | |
212 | inode->i_op = &hfs_dir_inode_operations; | |
213 | inode->i_fop = &hfs_dir_operations; | |
214 | inode->i_mode |= S_IRWXUGO; | |
215 | inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask; | |
216 | } else if (S_ISREG(mode)) { | |
217 | HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; | |
218 | HFS_SB(sb)->file_count++; | |
219 | if (dir->i_ino == HFS_ROOT_CNID) | |
220 | HFS_SB(sb)->root_files++; | |
221 | inode->i_op = &hfs_file_inode_operations; | |
222 | inode->i_fop = &hfs_file_operations; | |
223 | inode->i_mapping->a_ops = &hfs_aops; | |
224 | inode->i_mode |= S_IRUGO|S_IXUGO; | |
225 | if (mode & S_IWUSR) | |
226 | inode->i_mode |= S_IWUGO; | |
227 | inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask; | |
228 | HFS_I(inode)->phys_size = 0; | |
229 | HFS_I(inode)->alloc_blocks = 0; | |
230 | HFS_I(inode)->first_blocks = 0; | |
231 | HFS_I(inode)->cached_start = 0; | |
232 | HFS_I(inode)->cached_blocks = 0; | |
233 | memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec)); | |
234 | memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec)); | |
235 | } | |
236 | insert_inode_hash(inode); | |
237 | mark_inode_dirty(inode); | |
238 | set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); | |
5687b578 | 239 | hfs_mark_mdb_dirty(sb); |
1da177e4 LT |
240 | |
241 | return inode; | |
242 | } | |
243 | ||
244 | void hfs_delete_inode(struct inode *inode) | |
245 | { | |
246 | struct super_block *sb = inode->i_sb; | |
247 | ||
c2b3e1f7 | 248 | hfs_dbg(INODE, "delete_inode: %lu\n", inode->i_ino); |
1da177e4 LT |
249 | if (S_ISDIR(inode->i_mode)) { |
250 | HFS_SB(sb)->folder_count--; | |
251 | if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) | |
252 | HFS_SB(sb)->root_dirs--; | |
253 | set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); | |
5687b578 | 254 | hfs_mark_mdb_dirty(sb); |
1da177e4 LT |
255 | return; |
256 | } | |
257 | HFS_SB(sb)->file_count--; | |
258 | if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) | |
259 | HFS_SB(sb)->root_files--; | |
260 | if (S_ISREG(inode->i_mode)) { | |
261 | if (!inode->i_nlink) { | |
262 | inode->i_size = 0; | |
263 | hfs_file_truncate(inode); | |
264 | } | |
265 | } | |
266 | set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); | |
5687b578 | 267 | hfs_mark_mdb_dirty(sb); |
1da177e4 LT |
268 | } |
269 | ||
270 | void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, | |
271 | __be32 __log_size, __be32 phys_size, u32 clump_size) | |
272 | { | |
273 | struct super_block *sb = inode->i_sb; | |
274 | u32 log_size = be32_to_cpu(__log_size); | |
275 | u16 count; | |
276 | int i; | |
277 | ||
278 | memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec)); | |
279 | for (count = 0, i = 0; i < 3; i++) | |
280 | count += be16_to_cpu(ext[i].count); | |
281 | HFS_I(inode)->first_blocks = count; | |
282 | ||
283 | inode->i_size = HFS_I(inode)->phys_size = log_size; | |
284 | HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
285 | inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits); | |
286 | HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) / | |
287 | HFS_SB(sb)->alloc_blksz; | |
288 | HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz; | |
289 | if (!HFS_I(inode)->clump_blocks) | |
290 | HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; | |
291 | } | |
292 | ||
293 | struct hfs_iget_data { | |
294 | struct hfs_cat_key *key; | |
295 | hfs_cat_rec *rec; | |
296 | }; | |
297 | ||
298 | static int hfs_test_inode(struct inode *inode, void *data) | |
299 | { | |
300 | struct hfs_iget_data *idata = data; | |
301 | hfs_cat_rec *rec; | |
302 | ||
303 | rec = idata->rec; | |
304 | switch (rec->type) { | |
305 | case HFS_CDR_DIR: | |
306 | return inode->i_ino == be32_to_cpu(rec->dir.DirID); | |
307 | case HFS_CDR_FIL: | |
308 | return inode->i_ino == be32_to_cpu(rec->file.FlNum); | |
309 | default: | |
310 | BUG(); | |
311 | return 1; | |
312 | } | |
313 | } | |
314 | ||
315 | /* | |
316 | * hfs_read_inode | |
317 | */ | |
318 | static int hfs_read_inode(struct inode *inode, void *data) | |
319 | { | |
320 | struct hfs_iget_data *idata = data; | |
321 | struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); | |
322 | hfs_cat_rec *rec; | |
323 | ||
324 | HFS_I(inode)->flags = 0; | |
325 | HFS_I(inode)->rsrc_inode = NULL; | |
39f8d472 | 326 | mutex_init(&HFS_I(inode)->extents_lock); |
1da177e4 | 327 | INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); |
9717a91b | 328 | spin_lock_init(&HFS_I(inode)->open_dir_lock); |
1da177e4 LT |
329 | |
330 | /* Initialize the inode */ | |
331 | inode->i_uid = hsb->s_uid; | |
332 | inode->i_gid = hsb->s_gid; | |
bfe86848 | 333 | set_nlink(inode, 1); |
1da177e4 LT |
334 | |
335 | if (idata->key) | |
336 | HFS_I(inode)->cat_key = *idata->key; | |
337 | else | |
338 | HFS_I(inode)->flags |= HFS_FLG_RSRC; | |
339 | HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60; | |
340 | ||
341 | rec = idata->rec; | |
342 | switch (rec->type) { | |
343 | case HFS_CDR_FIL: | |
344 | if (!HFS_IS_RSRC(inode)) { | |
345 | hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen, | |
346 | rec->file.PyLen, be16_to_cpu(rec->file.ClpSize)); | |
347 | } else { | |
348 | hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen, | |
349 | rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize)); | |
350 | } | |
351 | ||
352 | inode->i_ino = be32_to_cpu(rec->file.FlNum); | |
353 | inode->i_mode = S_IRUGO | S_IXUGO; | |
354 | if (!(rec->file.Flags & HFS_FIL_LOCK)) | |
355 | inode->i_mode |= S_IWUGO; | |
356 | inode->i_mode &= ~hsb->s_file_umask; | |
357 | inode->i_mode |= S_IFREG; | |
358 | inode->i_ctime = inode->i_atime = inode->i_mtime = | |
4ddfc3dc | 359 | hfs_m_to_utime(rec->file.MdDat); |
1da177e4 LT |
360 | inode->i_op = &hfs_file_inode_operations; |
361 | inode->i_fop = &hfs_file_operations; | |
362 | inode->i_mapping->a_ops = &hfs_aops; | |
363 | break; | |
364 | case HFS_CDR_DIR: | |
365 | inode->i_ino = be32_to_cpu(rec->dir.DirID); | |
366 | inode->i_size = be16_to_cpu(rec->dir.Val) + 2; | |
367 | HFS_I(inode)->fs_blocks = 0; | |
368 | inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask); | |
369 | inode->i_ctime = inode->i_atime = inode->i_mtime = | |
4ddfc3dc | 370 | hfs_m_to_utime(rec->dir.MdDat); |
1da177e4 LT |
371 | inode->i_op = &hfs_dir_inode_operations; |
372 | inode->i_fop = &hfs_dir_operations; | |
373 | break; | |
374 | default: | |
375 | make_bad_inode(inode); | |
376 | } | |
377 | return 0; | |
378 | } | |
379 | ||
380 | /* | |
381 | * __hfs_iget() | |
382 | * | |
383 | * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in | |
384 | * the catalog B-tree and the 'type' of the desired file return the | |
385 | * inode for that file/directory or NULL. Note that 'type' indicates | |
386 | * whether we want the actual file or directory, or the corresponding | |
387 | * metadata (AppleDouble header file or CAP metadata file). | |
388 | */ | |
389 | struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec) | |
390 | { | |
391 | struct hfs_iget_data data = { key, rec }; | |
392 | struct inode *inode; | |
393 | u32 cnid; | |
394 | ||
395 | switch (rec->type) { | |
396 | case HFS_CDR_DIR: | |
397 | cnid = be32_to_cpu(rec->dir.DirID); | |
398 | break; | |
399 | case HFS_CDR_FIL: | |
400 | cnid = be32_to_cpu(rec->file.FlNum); | |
401 | break; | |
402 | default: | |
403 | return NULL; | |
404 | } | |
405 | inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data); | |
406 | if (inode && (inode->i_state & I_NEW)) | |
407 | unlock_new_inode(inode); | |
408 | return inode; | |
409 | } | |
410 | ||
411 | void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext, | |
412 | __be32 *log_size, __be32 *phys_size) | |
413 | { | |
414 | memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec)); | |
415 | ||
416 | if (log_size) | |
417 | *log_size = cpu_to_be32(inode->i_size); | |
418 | if (phys_size) | |
419 | *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks * | |
420 | HFS_SB(inode->i_sb)->alloc_blksz); | |
421 | } | |
422 | ||
a9185b41 | 423 | int hfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 LT |
424 | { |
425 | struct inode *main_inode = inode; | |
426 | struct hfs_find_data fd; | |
427 | hfs_cat_rec rec; | |
9509f178 | 428 | int res; |
1da177e4 | 429 | |
c2b3e1f7 | 430 | hfs_dbg(INODE, "hfs_write_inode: %lu\n", inode->i_ino); |
9509f178 AK |
431 | res = hfs_ext_write_extent(inode); |
432 | if (res) | |
433 | return res; | |
1da177e4 LT |
434 | |
435 | if (inode->i_ino < HFS_FIRSTUSER_CNID) { | |
436 | switch (inode->i_ino) { | |
437 | case HFS_ROOT_CNID: | |
438 | break; | |
439 | case HFS_EXT_CNID: | |
440 | hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree); | |
441 | return 0; | |
442 | case HFS_CAT_CNID: | |
443 | hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree); | |
444 | return 0; | |
445 | default: | |
446 | BUG(); | |
447 | return -EIO; | |
448 | } | |
449 | } | |
450 | ||
451 | if (HFS_IS_RSRC(inode)) | |
452 | main_inode = HFS_I(inode)->rsrc_inode; | |
453 | ||
454 | if (!main_inode->i_nlink) | |
455 | return 0; | |
456 | ||
457 | if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd)) | |
458 | /* panic? */ | |
459 | return -EIO; | |
460 | ||
cb7a95af | 461 | res = -EIO; |
8d824e69 | 462 | if (HFS_I(main_inode)->cat_key.CName.len > HFS_NAMELEN) |
cb7a95af | 463 | goto out; |
1da177e4 LT |
464 | fd.search_key->cat = HFS_I(main_inode)->cat_key; |
465 | if (hfs_brec_find(&fd)) | |
1da177e4 LT |
466 | goto out; |
467 | ||
468 | if (S_ISDIR(main_inode->i_mode)) { | |
cb7a95af LT |
469 | if (fd.entrylength < sizeof(struct hfs_cat_dir)) |
470 | goto out; | |
1da177e4 LT |
471 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, |
472 | sizeof(struct hfs_cat_dir)); | |
473 | if (rec.type != HFS_CDR_DIR || | |
474 | be32_to_cpu(rec.dir.DirID) != inode->i_ino) { | |
475 | } | |
476 | ||
477 | rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime); | |
478 | rec.dir.Val = cpu_to_be16(inode->i_size - 2); | |
479 | ||
480 | hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, | |
481 | sizeof(struct hfs_cat_dir)); | |
482 | } else if (HFS_IS_RSRC(inode)) { | |
cb7a95af LT |
483 | if (fd.entrylength < sizeof(struct hfs_cat_file)) |
484 | goto out; | |
1da177e4 LT |
485 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, |
486 | sizeof(struct hfs_cat_file)); | |
487 | hfs_inode_write_fork(inode, rec.file.RExtRec, | |
488 | &rec.file.RLgLen, &rec.file.RPyLen); | |
489 | hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, | |
490 | sizeof(struct hfs_cat_file)); | |
491 | } else { | |
cb7a95af LT |
492 | if (fd.entrylength < sizeof(struct hfs_cat_file)) |
493 | goto out; | |
1da177e4 LT |
494 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, |
495 | sizeof(struct hfs_cat_file)); | |
496 | if (rec.type != HFS_CDR_FIL || | |
497 | be32_to_cpu(rec.file.FlNum) != inode->i_ino) { | |
498 | } | |
499 | ||
500 | if (inode->i_mode & S_IWUSR) | |
501 | rec.file.Flags &= ~HFS_FIL_LOCK; | |
502 | else | |
503 | rec.file.Flags |= HFS_FIL_LOCK; | |
504 | hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen); | |
505 | rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime); | |
506 | ||
507 | hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, | |
508 | sizeof(struct hfs_cat_file)); | |
509 | } | |
cb7a95af | 510 | res = 0; |
1da177e4 LT |
511 | out: |
512 | hfs_find_exit(&fd); | |
cb7a95af | 513 | return res; |
1da177e4 LT |
514 | } |
515 | ||
516 | static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry, | |
00cd8dd3 | 517 | unsigned int flags) |
1da177e4 LT |
518 | { |
519 | struct inode *inode = NULL; | |
520 | hfs_cat_rec rec; | |
521 | struct hfs_find_data fd; | |
522 | int res; | |
523 | ||
524 | if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) | |
525 | goto out; | |
526 | ||
527 | inode = HFS_I(dir)->rsrc_inode; | |
528 | if (inode) | |
529 | goto out; | |
530 | ||
531 | inode = new_inode(dir->i_sb); | |
532 | if (!inode) | |
533 | return ERR_PTR(-ENOMEM); | |
534 | ||
9509f178 AK |
535 | res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); |
536 | if (res) { | |
537 | iput(inode); | |
538 | return ERR_PTR(res); | |
539 | } | |
1da177e4 LT |
540 | fd.search_key->cat = HFS_I(dir)->cat_key; |
541 | res = hfs_brec_read(&fd, &rec, sizeof(rec)); | |
542 | if (!res) { | |
543 | struct hfs_iget_data idata = { NULL, &rec }; | |
544 | hfs_read_inode(inode, &idata); | |
545 | } | |
546 | hfs_find_exit(&fd); | |
547 | if (res) { | |
548 | iput(inode); | |
549 | return ERR_PTR(res); | |
550 | } | |
551 | HFS_I(inode)->rsrc_inode = dir; | |
552 | HFS_I(dir)->rsrc_inode = inode; | |
553 | igrab(dir); | |
5bef9151 | 554 | inode_fake_hash(inode); |
1da177e4 | 555 | mark_inode_dirty(inode); |
0e5c56fd | 556 | dont_mount(dentry); |
1da177e4 | 557 | out: |
6b9cceea | 558 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
559 | } |
560 | ||
b57922d9 | 561 | void hfs_evict_inode(struct inode *inode) |
1da177e4 | 562 | { |
91b0abe3 | 563 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 564 | clear_inode(inode); |
1da177e4 LT |
565 | if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) { |
566 | HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL; | |
567 | iput(HFS_I(inode)->rsrc_inode); | |
568 | } | |
569 | } | |
570 | ||
1da177e4 LT |
571 | static int hfs_file_open(struct inode *inode, struct file *file) |
572 | { | |
573 | if (HFS_IS_RSRC(inode)) | |
574 | inode = HFS_I(inode)->rsrc_inode; | |
1da177e4 LT |
575 | atomic_inc(&HFS_I(inode)->opencnt); |
576 | return 0; | |
577 | } | |
578 | ||
579 | static int hfs_file_release(struct inode *inode, struct file *file) | |
580 | { | |
581 | //struct super_block *sb = inode->i_sb; | |
582 | ||
583 | if (HFS_IS_RSRC(inode)) | |
584 | inode = HFS_I(inode)->rsrc_inode; | |
1da177e4 | 585 | if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) { |
5955102c | 586 | inode_lock(inode); |
1da177e4 LT |
587 | hfs_file_truncate(inode); |
588 | //if (inode->i_flags & S_DEAD) { | |
589 | // hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); | |
590 | // hfs_delete_inode(inode); | |
591 | //} | |
5955102c | 592 | inode_unlock(inode); |
1da177e4 LT |
593 | } |
594 | return 0; | |
595 | } | |
596 | ||
597 | /* | |
598 | * hfs_notify_change() | |
599 | * | |
600 | * Based very closely on fs/msdos/inode.c by Werner Almesberger | |
601 | * | |
602 | * This is the notify_change() field in the super_operations structure | |
603 | * for HFS file systems. The purpose is to take that changes made to | |
604 | * an inode and apply then in a filesystem-dependent manner. In this | |
605 | * case the process has a few of tasks to do: | |
606 | * 1) prevent changes to the i_uid and i_gid fields. | |
607 | * 2) map file permissions to the closest allowable permissions | |
608 | * 3) Since multiple Linux files can share the same on-disk inode under | |
609 | * HFS (for instance the data and resource forks of a file) a change | |
610 | * to permissions must be applied to all other in-core inodes which | |
611 | * correspond to the same HFS file. | |
612 | */ | |
613 | ||
549c7297 CB |
614 | int hfs_inode_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, |
615 | struct iattr *attr) | |
1da177e4 | 616 | { |
2b0143b5 | 617 | struct inode *inode = d_inode(dentry); |
1da177e4 LT |
618 | struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); |
619 | int error; | |
620 | ||
549c7297 CB |
621 | error = setattr_prepare(&init_user_ns, dentry, |
622 | attr); /* basic permission checks */ | |
1da177e4 LT |
623 | if (error) |
624 | return error; | |
625 | ||
626 | /* no uig/gid changes and limit which mode bits can be set */ | |
627 | if (((attr->ia_valid & ATTR_UID) && | |
43b5e4cc | 628 | (!uid_eq(attr->ia_uid, hsb->s_uid))) || |
1da177e4 | 629 | ((attr->ia_valid & ATTR_GID) && |
43b5e4cc | 630 | (!gid_eq(attr->ia_gid, hsb->s_gid))) || |
1da177e4 LT |
631 | ((attr->ia_valid & ATTR_MODE) && |
632 | ((S_ISDIR(inode->i_mode) && | |
633 | (attr->ia_mode != inode->i_mode)) || | |
634 | (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) { | |
635 | return hsb->s_quiet ? 0 : error; | |
636 | } | |
637 | ||
638 | if (attr->ia_valid & ATTR_MODE) { | |
639 | /* Only the 'w' bits can ever change and only all together. */ | |
640 | if (attr->ia_mode & S_IWUSR) | |
641 | attr->ia_mode = inode->i_mode | S_IWUGO; | |
642 | else | |
643 | attr->ia_mode = inode->i_mode & ~S_IWUGO; | |
644 | attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask; | |
645 | } | |
1da177e4 | 646 | |
1025774c CH |
647 | if ((attr->ia_valid & ATTR_SIZE) && |
648 | attr->ia_size != i_size_read(inode)) { | |
562c72aa CH |
649 | inode_dio_wait(inode); |
650 | ||
c8cf464b | 651 | error = inode_newsize_ok(inode, attr->ia_size); |
1025774c CH |
652 | if (error) |
653 | return error; | |
c8cf464b MS |
654 | |
655 | truncate_setsize(inode, attr->ia_size); | |
656 | hfs_file_truncate(inode); | |
8cd3cb50 EF |
657 | inode->i_atime = inode->i_mtime = inode->i_ctime = |
658 | current_time(inode); | |
1025774c CH |
659 | } |
660 | ||
2f221d6f | 661 | setattr_copy(&init_user_ns, inode, attr); |
1025774c | 662 | mark_inode_dirty(inode); |
1da177e4 LT |
663 | return 0; |
664 | } | |
665 | ||
02c24a82 JB |
666 | static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end, |
667 | int datasync) | |
b5fc510c AV |
668 | { |
669 | struct inode *inode = filp->f_mapping->host; | |
670 | struct super_block * sb; | |
671 | int ret, err; | |
672 | ||
3b49c9a1 | 673 | ret = file_write_and_wait_range(filp, start, end); |
02c24a82 JB |
674 | if (ret) |
675 | return ret; | |
5955102c | 676 | inode_lock(inode); |
02c24a82 | 677 | |
b5fc510c AV |
678 | /* sync the inode to buffers */ |
679 | ret = write_inode_now(inode, 0); | |
680 | ||
681 | /* sync the superblock to buffers */ | |
682 | sb = inode->i_sb; | |
43829731 | 683 | flush_delayed_work(&HFS_SB(sb)->mdb_work); |
b5fc510c AV |
684 | /* .. finally sync the buffers to disk */ |
685 | err = sync_blockdev(sb->s_bdev); | |
686 | if (!ret) | |
687 | ret = err; | |
5955102c | 688 | inode_unlock(inode); |
b5fc510c AV |
689 | return ret; |
690 | } | |
1da177e4 | 691 | |
4b6f5d20 | 692 | static const struct file_operations hfs_file_operations = { |
1da177e4 | 693 | .llseek = generic_file_llseek, |
aad4f8bb | 694 | .read_iter = generic_file_read_iter, |
8174202b | 695 | .write_iter = generic_file_write_iter, |
1da177e4 | 696 | .mmap = generic_file_mmap, |
5ffc4ef4 | 697 | .splice_read = generic_file_splice_read, |
b5fc510c | 698 | .fsync = hfs_file_fsync, |
1da177e4 LT |
699 | .open = hfs_file_open, |
700 | .release = hfs_file_release, | |
701 | }; | |
702 | ||
92e1d5be | 703 | static const struct inode_operations hfs_file_inode_operations = { |
1da177e4 | 704 | .lookup = hfs_file_lookup, |
1da177e4 | 705 | .setattr = hfs_inode_setattr, |
b8020eff | 706 | .listxattr = generic_listxattr, |
1da177e4 | 707 | }; |