blob: a05b3afa72301cc0375fe7ab7c8f9311dee839f8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/hfsplus/inode.c
3 *
4 * Copyright (C) 2001
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
7 *
8 * Inode handling routines
9 */
10
11#include <linux/mm.h>
12#include <linux/fs.h>
13#include <linux/pagemap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/mpage.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040015#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17#include "hfsplus_fs.h"
18#include "hfsplus_raw.h"
19
20static int hfsplus_readpage(struct file *file, struct page *page)
21{
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 return block_read_full_page(page, hfsplus_get_block);
23}
24
25static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
26{
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 return block_write_full_page(page, hfsplus_get_block, wbc);
28}
29
Nick Piggin7c0efc62007-10-16 01:25:09 -070030static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
31 loff_t pos, unsigned len, unsigned flags,
32 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -070033{
Christoph Hellwig282dc172010-06-04 11:29:55 +020034 int ret;
35
Nick Piggin7c0efc62007-10-16 01:25:09 -070036 *pagep = NULL;
Christoph Hellwig282dc172010-06-04 11:29:55 +020037 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
Nick Piggin7c0efc62007-10-16 01:25:09 -070038 hfsplus_get_block,
Christoph Hellwig6af502d2010-10-01 05:43:31 +020039 &HFSPLUS_I(mapping->host)->phys_size);
Christoph Hellwig282dc172010-06-04 11:29:55 +020040 if (unlikely(ret)) {
41 loff_t isize = mapping->host->i_size;
42 if (pos + len > isize)
43 vmtruncate(mapping->host, isize);
44 }
45
46 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047}
48
49static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
50{
51 return generic_block_bmap(mapping, block, hfsplus_get_block);
52}
53
Al Viro27496a82005-10-21 03:20:48 -040054static int hfsplus_releasepage(struct page *page, gfp_t mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070055{
56 struct inode *inode = page->mapping->host;
57 struct super_block *sb = inode->i_sb;
58 struct hfs_btree *tree;
59 struct hfs_bnode *node;
60 u32 nidx;
61 int i, res = 1;
62
63 switch (inode->i_ino) {
64 case HFSPLUS_EXT_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020065 tree = HFSPLUS_SB(sb)->ext_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 break;
67 case HFSPLUS_CAT_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020068 tree = HFSPLUS_SB(sb)->cat_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 break;
70 case HFSPLUS_ATTR_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020071 tree = HFSPLUS_SB(sb)->attr_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 break;
73 default:
74 BUG();
75 return 0;
76 }
Eric Sesterhenn70632242008-05-12 14:02:21 -070077 if (!tree)
78 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 if (tree->node_size >= PAGE_CACHE_SIZE) {
80 nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
81 spin_lock(&tree->hash_lock);
82 node = hfs_bnode_findhash(tree, nidx);
83 if (!node)
84 ;
85 else if (atomic_read(&node->refcnt))
86 res = 0;
87 if (res && node) {
88 hfs_bnode_unhash(node);
89 hfs_bnode_free(node);
90 }
91 spin_unlock(&tree->hash_lock);
92 } else {
93 nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
94 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
95 spin_lock(&tree->hash_lock);
96 do {
97 node = hfs_bnode_findhash(tree, nidx++);
98 if (!node)
99 continue;
100 if (atomic_read(&node->refcnt)) {
101 res = 0;
102 break;
103 }
104 hfs_bnode_unhash(node);
105 hfs_bnode_free(node);
106 } while (--i && nidx < tree->node_count);
107 spin_unlock(&tree->hash_lock);
108 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 return res ? try_to_free_buffers(page) : 0;
110}
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
113 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
114{
115 struct file *file = iocb->ki_filp;
Josef Sipekf44ea032006-12-08 02:37:04 -0800116 struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200117 ssize_t ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200119 ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
Badari Pulavarty1d8fa7a2006-03-26 01:38:02 -0800120 offset, nr_segs, hfsplus_get_block, NULL);
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200121
122 /*
123 * In case of error extending write may have instantiated a few
124 * blocks outside i_size. Trim these off again.
125 */
126 if (unlikely((rw & WRITE) && ret < 0)) {
127 loff_t isize = i_size_read(inode);
128 loff_t end = offset + iov_length(iov, nr_segs);
129
130 if (end > isize)
131 vmtruncate(inode, isize);
132 }
133
134 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135}
136
137static int hfsplus_writepages(struct address_space *mapping,
138 struct writeback_control *wbc)
139{
140 return mpage_writepages(mapping, wbc, hfsplus_get_block);
141}
142
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700143const struct address_space_operations hfsplus_btree_aops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 .readpage = hfsplus_readpage,
145 .writepage = hfsplus_writepage,
146 .sync_page = block_sync_page,
Nick Piggin7c0efc62007-10-16 01:25:09 -0700147 .write_begin = hfsplus_write_begin,
148 .write_end = generic_write_end,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 .bmap = hfsplus_bmap,
150 .releasepage = hfsplus_releasepage,
151};
152
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700153const struct address_space_operations hfsplus_aops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 .readpage = hfsplus_readpage,
155 .writepage = hfsplus_writepage,
156 .sync_page = block_sync_page,
Nick Piggin7c0efc62007-10-16 01:25:09 -0700157 .write_begin = hfsplus_write_begin,
158 .write_end = generic_write_end,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 .bmap = hfsplus_bmap,
160 .direct_IO = hfsplus_direct_IO,
161 .writepages = hfsplus_writepages,
162};
163
Al Viroe16404e2009-02-20 05:55:13 +0000164const struct dentry_operations hfsplus_dentry_operations = {
Duane Griffind45bce82007-07-15 23:41:23 -0700165 .d_hash = hfsplus_hash_dentry,
166 .d_compare = hfsplus_compare_dentry,
167};
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry,
170 struct nameidata *nd)
171{
172 struct hfs_find_data fd;
173 struct super_block *sb = dir->i_sb;
174 struct inode *inode = NULL;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200175 struct hfsplus_inode_info *hip;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 int err;
177
178 if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
179 goto out;
180
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200181 inode = HFSPLUS_I(dir)->rsrc_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 if (inode)
183 goto out;
184
185 inode = new_inode(sb);
186 if (!inode)
187 return ERR_PTR(-ENOMEM);
188
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200189 hip = HFSPLUS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 inode->i_ino = dir->i_ino;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200191 INIT_LIST_HEAD(&hip->open_dir_list);
192 mutex_init(&hip->extents_lock);
193 hip->flags = HFSPLUS_FLG_RSRC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200195 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
197 if (!err)
198 err = hfsplus_cat_read_inode(inode, &fd);
199 hfs_find_exit(&fd);
200 if (err) {
201 iput(inode);
202 return ERR_PTR(err);
203 }
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200204 hip->rsrc_inode = dir;
205 HFSPLUS_I(dir)->rsrc_inode = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 igrab(dir);
Christoph Hellwig58a818f2010-10-01 05:44:02 +0200207
208 /*
209 * __mark_inode_dirty expects inodes to be hashed. Since we don't
210 * want resource fork inodes in the regular inode space, we make them
211 * appear hashed, but do not put on any lists. hlist_del()
212 * will work fine and require no locking.
213 */
214 inode->i_hash.pprev = &inode->i_hash.next;
215
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 mark_inode_dirty(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217out:
218 d_add(dentry, inode);
219 return NULL;
220}
221
222static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
223{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200224 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 u16 mode;
226
227 mode = be16_to_cpu(perms->mode);
228
229 inode->i_uid = be32_to_cpu(perms->owner);
230 if (!inode->i_uid && !mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200231 inode->i_uid = sbi->uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
233 inode->i_gid = be32_to_cpu(perms->group);
234 if (!inode->i_gid && !mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200235 inode->i_gid = sbi->gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
237 if (dir) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200238 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 mode |= S_IFDIR;
240 } else if (!mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200241 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 inode->i_mode = mode;
243
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200244 HFSPLUS_I(inode)->rootflags = perms->rootflags;
245 HFSPLUS_I(inode)->userflags = perms->userflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
247 inode->i_flags |= S_IMMUTABLE;
248 else
249 inode->i_flags &= ~S_IMMUTABLE;
250 if (perms->rootflags & HFSPLUS_FLG_APPEND)
251 inode->i_flags |= S_APPEND;
252 else
253 inode->i_flags &= ~S_APPEND;
254}
255
256static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
257{
258 if (inode->i_flags & S_IMMUTABLE)
259 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
260 else
261 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
262 if (inode->i_flags & S_APPEND)
263 perms->rootflags |= HFSPLUS_FLG_APPEND;
264 else
265 perms->rootflags &= ~HFSPLUS_FLG_APPEND;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200266 perms->userflags = HFSPLUS_I(inode)->userflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 perms->mode = cpu_to_be16(inode->i_mode);
268 perms->owner = cpu_to_be32(inode->i_uid);
269 perms->group = cpu_to_be32(inode->i_gid);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200270 perms->dev = cpu_to_be32(HFSPLUS_I(inode)->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271}
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273static int hfsplus_file_open(struct inode *inode, struct file *file)
274{
275 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200276 inode = HFSPLUS_I(inode)->rsrc_inode;
Alan Cox6e715292008-10-18 20:28:01 -0700277 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
278 return -EOVERFLOW;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200279 atomic_inc(&HFSPLUS_I(inode)->opencnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 return 0;
281}
282
283static int hfsplus_file_release(struct inode *inode, struct file *file)
284{
285 struct super_block *sb = inode->i_sb;
286
287 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200288 inode = HFSPLUS_I(inode)->rsrc_inode;
289 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800290 mutex_lock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 hfsplus_file_truncate(inode);
292 if (inode->i_flags & S_DEAD) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200293 hfsplus_delete_cat(inode->i_ino,
294 HFSPLUS_SB(sb)->hidden_dir, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 hfsplus_delete_inode(inode);
296 }
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800297 mutex_unlock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 }
299 return 0;
300}
301
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200302static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
303{
304 struct inode *inode = dentry->d_inode;
305 int error;
306
307 error = inode_change_ok(inode, attr);
308 if (error)
309 return error;
Christoph Hellwig10257742010-06-04 11:30:02 +0200310
311 if ((attr->ia_valid & ATTR_SIZE) &&
312 attr->ia_size != i_size_read(inode)) {
313 error = vmtruncate(inode, attr->ia_size);
314 if (error)
315 return error;
316 }
317
318 setattr_copy(inode, attr);
319 mark_inode_dirty(inode);
320 return 0;
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200321}
322
Al Virob5fc5102010-07-04 12:24:09 +0400323static int hfsplus_file_fsync(struct file *filp, int datasync)
324{
325 struct inode *inode = filp->f_mapping->host;
326 struct super_block * sb;
327 int ret, err;
328
329 /* sync the inode to buffers */
330 ret = write_inode_now(inode, 0);
331
332 /* sync the superblock to buffers */
333 sb = inode->i_sb;
334 if (sb->s_dirt) {
335 if (!(sb->s_flags & MS_RDONLY))
336 hfsplus_sync_fs(sb, 1);
337 else
338 sb->s_dirt = 0;
339 }
340
341 /* .. finally sync the buffers to disk */
342 err = sync_blockdev(sb->s_bdev);
343 if (!ret)
344 ret = err;
345 return ret;
346}
347
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800348static const struct inode_operations hfsplus_file_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 .lookup = hfsplus_file_lookup,
350 .truncate = hfsplus_file_truncate,
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200351 .setattr = hfsplus_setattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 .setxattr = hfsplus_setxattr,
353 .getxattr = hfsplus_getxattr,
354 .listxattr = hfsplus_listxattr,
355};
356
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800357static const struct file_operations hfsplus_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 .llseek = generic_file_llseek,
Badari Pulavarty543ade12006-09-30 23:28:48 -0700359 .read = do_sync_read,
360 .aio_read = generic_file_aio_read,
361 .write = do_sync_write,
362 .aio_write = generic_file_aio_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 .mmap = generic_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200364 .splice_read = generic_file_splice_read,
Al Virob5fc5102010-07-04 12:24:09 +0400365 .fsync = hfsplus_file_fsync,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 .open = hfsplus_file_open,
367 .release = hfsplus_file_release,
Arnd Bergmann7cc4bcc2010-04-27 16:24:20 +0200368 .unlocked_ioctl = hfsplus_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369};
370
371struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
372{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200373 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 struct inode *inode = new_inode(sb);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200375 struct hfsplus_inode_info *hip;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200376
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 if (!inode)
378 return NULL;
379
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200380 inode->i_ino = sbi->next_cnid++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 inode->i_mode = mode;
David Howells4ac84892008-11-14 10:38:54 +1100382 inode->i_uid = current_fsuid();
383 inode->i_gid = current_fsgid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 inode->i_nlink = 1;
385 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200386
387 hip = HFSPLUS_I(inode);
388 INIT_LIST_HEAD(&hip->open_dir_list);
389 mutex_init(&hip->extents_lock);
390 atomic_set(&hip->opencnt, 0);
391 hip->flags = 0;
392 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
393 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
394 hip->alloc_blocks = 0;
395 hip->first_blocks = 0;
396 hip->cached_start = 0;
397 hip->cached_blocks = 0;
398 hip->phys_size = 0;
399 hip->fs_blocks = 0;
400 hip->rsrc_inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 if (S_ISDIR(inode->i_mode)) {
402 inode->i_size = 2;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200403 sbi->folder_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 inode->i_op = &hfsplus_dir_inode_operations;
405 inode->i_fop = &hfsplus_dir_operations;
406 } else if (S_ISREG(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200407 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 inode->i_op = &hfsplus_file_inode_operations;
409 inode->i_fop = &hfsplus_file_operations;
410 inode->i_mapping->a_ops = &hfsplus_aops;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200411 hip->clump_blocks = sbi->data_clump_blocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 } else if (S_ISLNK(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200413 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 inode->i_op = &page_symlink_inode_operations;
415 inode->i_mapping->a_ops = &hfsplus_aops;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200416 hip->clump_blocks = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 } else
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200418 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 insert_inode_hash(inode);
420 mark_inode_dirty(inode);
421 sb->s_dirt = 1;
422
423 return inode;
424}
425
426void hfsplus_delete_inode(struct inode *inode)
427{
428 struct super_block *sb = inode->i_sb;
429
430 if (S_ISDIR(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200431 HFSPLUS_SB(sb)->folder_count--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 sb->s_dirt = 1;
433 return;
434 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200435 HFSPLUS_SB(sb)->file_count--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 if (S_ISREG(inode->i_mode)) {
437 if (!inode->i_nlink) {
438 inode->i_size = 0;
439 hfsplus_file_truncate(inode);
440 }
441 } else if (S_ISLNK(inode->i_mode)) {
442 inode->i_size = 0;
443 hfsplus_file_truncate(inode);
444 }
445 sb->s_dirt = 1;
446}
447
448void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
449{
450 struct super_block *sb = inode->i_sb;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200451 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200452 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 u32 count;
454 int i;
455
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200456 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 for (count = 0, i = 0; i < 8; i++)
458 count += be32_to_cpu(fork->extents[i].block_count);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200459 hip->first_blocks = count;
460 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
461 hip->cached_start = 0;
462 hip->cached_blocks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200464 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
465 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
466 hip->fs_blocks =
467 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
468 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
469 hip->clump_blocks =
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200470 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200471 if (!hip->clump_blocks) {
472 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200473 sbi->rsrc_clump_blocks :
474 sbi->data_clump_blocks;
475 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476}
477
478void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
479{
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200480 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 sizeof(hfsplus_extent_rec));
482 fork->total_size = cpu_to_be64(inode->i_size);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200483 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484}
485
486int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
487{
488 hfsplus_cat_entry entry;
489 int res = 0;
490 u16 type;
491
492 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
493
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200494 HFSPLUS_I(inode)->dev = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 if (type == HFSPLUS_FOLDER) {
496 struct hfsplus_cat_folder *folder = &entry.folder;
497
498 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
499 /* panic? */;
500 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
501 sizeof(struct hfsplus_cat_folder));
502 hfsplus_get_perms(inode, &folder->permissions, 1);
503 inode->i_nlink = 1;
504 inode->i_size = 2 + be32_to_cpu(folder->valence);
505 inode->i_atime = hfsp_mt2ut(folder->access_date);
506 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
Roman Zippel9a4cad92006-01-18 17:43:09 -0800507 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200508 HFSPLUS_I(inode)->create_date = folder->create_date;
509 HFSPLUS_I(inode)->fs_blocks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 inode->i_op = &hfsplus_dir_inode_operations;
511 inode->i_fop = &hfsplus_dir_operations;
512 } else if (type == HFSPLUS_FILE) {
513 struct hfsplus_cat_file *file = &entry.file;
514
515 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
516 /* panic? */;
517 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
518 sizeof(struct hfsplus_cat_file));
519
520 hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
521 &file->data_fork : &file->rsrc_fork);
522 hfsplus_get_perms(inode, &file->permissions, 0);
523 inode->i_nlink = 1;
524 if (S_ISREG(inode->i_mode)) {
525 if (file->permissions.dev)
526 inode->i_nlink = be32_to_cpu(file->permissions.dev);
527 inode->i_op = &hfsplus_file_inode_operations;
528 inode->i_fop = &hfsplus_file_operations;
529 inode->i_mapping->a_ops = &hfsplus_aops;
530 } else if (S_ISLNK(inode->i_mode)) {
531 inode->i_op = &page_symlink_inode_operations;
532 inode->i_mapping->a_ops = &hfsplus_aops;
533 } else {
534 init_special_inode(inode, inode->i_mode,
535 be32_to_cpu(file->permissions.dev));
536 }
537 inode->i_atime = hfsp_mt2ut(file->access_date);
538 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
Roman Zippel9a4cad92006-01-18 17:43:09 -0800539 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200540 HFSPLUS_I(inode)->create_date = file->create_date;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 } else {
Roman Zippel634725a2006-01-18 17:43:05 -0800542 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 res = -EIO;
544 }
545 return res;
546}
547
548int hfsplus_cat_write_inode(struct inode *inode)
549{
550 struct inode *main_inode = inode;
551 struct hfs_find_data fd;
552 hfsplus_cat_entry entry;
553
554 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200555 main_inode = HFSPLUS_I(inode)->rsrc_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
557 if (!main_inode->i_nlink)
558 return 0;
559
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200560 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 /* panic? */
562 return -EIO;
563
564 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
565 /* panic? */
566 goto out;
567
568 if (S_ISDIR(main_inode->i_mode)) {
569 struct hfsplus_cat_folder *folder = &entry.folder;
570
571 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
572 /* panic? */;
573 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
574 sizeof(struct hfsplus_cat_folder));
575 /* simple node checks? */
576 hfsplus_set_perms(inode, &folder->permissions);
577 folder->access_date = hfsp_ut2mt(inode->i_atime);
578 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
579 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
580 folder->valence = cpu_to_be32(inode->i_size - 2);
581 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
582 sizeof(struct hfsplus_cat_folder));
583 } else if (HFSPLUS_IS_RSRC(inode)) {
584 struct hfsplus_cat_file *file = &entry.file;
585 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
586 sizeof(struct hfsplus_cat_file));
587 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
588 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
589 sizeof(struct hfsplus_cat_file));
590 } else {
591 struct hfsplus_cat_file *file = &entry.file;
592
593 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
594 /* panic? */;
595 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
596 sizeof(struct hfsplus_cat_file));
597 hfsplus_inode_write_fork(inode, &file->data_fork);
598 if (S_ISREG(inode->i_mode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200599 HFSPLUS_I(inode)->dev = inode->i_nlink;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200601 HFSPLUS_I(inode)->dev = kdev_t_to_nr(inode->i_rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 hfsplus_set_perms(inode, &file->permissions);
603 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
604 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
605 else
606 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
607 file->access_date = hfsp_ut2mt(inode->i_atime);
608 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
609 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
610 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
611 sizeof(struct hfsplus_cat_file));
612 }
613out:
614 hfs_find_exit(&fd);
615 return 0;
616}