blob: bda7464c205d1b07f0641f6e6524466e504cd273 [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
Christoph Hellwig34a2d312010-11-23 14:38:21 +010011#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/mm.h>
13#include <linux/fs.h>
14#include <linux/pagemap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/mpage.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040016#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18#include "hfsplus_fs.h"
19#include "hfsplus_raw.h"
20
21static int hfsplus_readpage(struct file *file, struct page *page)
22{
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 return block_read_full_page(page, hfsplus_get_block);
24}
25
26static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
27{
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 return block_write_full_page(page, hfsplus_get_block, wbc);
29}
30
Nick Piggin7c0efc62007-10-16 01:25:09 -070031static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
32 loff_t pos, unsigned len, unsigned flags,
33 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -070034{
Christoph Hellwig282dc172010-06-04 11:29:55 +020035 int ret;
36
Nick Piggin7c0efc62007-10-16 01:25:09 -070037 *pagep = NULL;
Christoph Hellwig282dc172010-06-04 11:29:55 +020038 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
Nick Piggin7c0efc62007-10-16 01:25:09 -070039 hfsplus_get_block,
Christoph Hellwig6af502d2010-10-01 05:43:31 +020040 &HFSPLUS_I(mapping->host)->phys_size);
Christoph Hellwig282dc172010-06-04 11:29:55 +020041 if (unlikely(ret)) {
42 loff_t isize = mapping->host->i_size;
43 if (pos + len > isize)
44 vmtruncate(mapping->host, isize);
45 }
46
47 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048}
49
50static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
51{
52 return generic_block_bmap(mapping, block, hfsplus_get_block);
53}
54
Al Viro27496a82005-10-21 03:20:48 -040055static int hfsplus_releasepage(struct page *page, gfp_t mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070056{
57 struct inode *inode = page->mapping->host;
58 struct super_block *sb = inode->i_sb;
59 struct hfs_btree *tree;
60 struct hfs_bnode *node;
61 u32 nidx;
62 int i, res = 1;
63
64 switch (inode->i_ino) {
65 case HFSPLUS_EXT_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020066 tree = HFSPLUS_SB(sb)->ext_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 break;
68 case HFSPLUS_CAT_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020069 tree = HFSPLUS_SB(sb)->cat_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 break;
71 case HFSPLUS_ATTR_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020072 tree = HFSPLUS_SB(sb)->attr_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 break;
74 default:
75 BUG();
76 return 0;
77 }
Eric Sesterhenn70632242008-05-12 14:02:21 -070078 if (!tree)
79 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 if (tree->node_size >= PAGE_CACHE_SIZE) {
81 nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
82 spin_lock(&tree->hash_lock);
83 node = hfs_bnode_findhash(tree, nidx);
84 if (!node)
85 ;
86 else if (atomic_read(&node->refcnt))
87 res = 0;
88 if (res && node) {
89 hfs_bnode_unhash(node);
90 hfs_bnode_free(node);
91 }
92 spin_unlock(&tree->hash_lock);
93 } else {
94 nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
95 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
96 spin_lock(&tree->hash_lock);
97 do {
98 node = hfs_bnode_findhash(tree, nidx++);
99 if (!node)
100 continue;
101 if (atomic_read(&node->refcnt)) {
102 res = 0;
103 break;
104 }
105 hfs_bnode_unhash(node);
106 hfs_bnode_free(node);
107 } while (--i && nidx < tree->node_count);
108 spin_unlock(&tree->hash_lock);
109 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 return res ? try_to_free_buffers(page) : 0;
111}
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
114 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
115{
116 struct file *file = iocb->ki_filp;
Josef Sipekf44ea032006-12-08 02:37:04 -0800117 struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200118 ssize_t ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200120 ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
Badari Pulavarty1d8fa7a2006-03-26 01:38:02 -0800121 offset, nr_segs, hfsplus_get_block, NULL);
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200122
123 /*
124 * In case of error extending write may have instantiated a few
125 * blocks outside i_size. Trim these off again.
126 */
127 if (unlikely((rw & WRITE) && ret < 0)) {
128 loff_t isize = i_size_read(inode);
129 loff_t end = offset + iov_length(iov, nr_segs);
130
131 if (end > isize)
132 vmtruncate(inode, isize);
133 }
134
135 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136}
137
138static int hfsplus_writepages(struct address_space *mapping,
139 struct writeback_control *wbc)
140{
141 return mpage_writepages(mapping, wbc, hfsplus_get_block);
142}
143
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700144const struct address_space_operations hfsplus_btree_aops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 .readpage = hfsplus_readpage,
146 .writepage = hfsplus_writepage,
147 .sync_page = block_sync_page,
Nick Piggin7c0efc62007-10-16 01:25:09 -0700148 .write_begin = hfsplus_write_begin,
149 .write_end = generic_write_end,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 .bmap = hfsplus_bmap,
151 .releasepage = hfsplus_releasepage,
152};
153
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700154const struct address_space_operations hfsplus_aops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 .readpage = hfsplus_readpage,
156 .writepage = hfsplus_writepage,
157 .sync_page = block_sync_page,
Nick Piggin7c0efc62007-10-16 01:25:09 -0700158 .write_begin = hfsplus_write_begin,
159 .write_end = generic_write_end,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 .bmap = hfsplus_bmap,
161 .direct_IO = hfsplus_direct_IO,
162 .writepages = hfsplus_writepages,
163};
164
Al Viroe16404e2009-02-20 05:55:13 +0000165const struct dentry_operations hfsplus_dentry_operations = {
Duane Griffind45bce82007-07-15 23:41:23 -0700166 .d_hash = hfsplus_hash_dentry,
167 .d_compare = hfsplus_compare_dentry,
168};
169
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry,
171 struct nameidata *nd)
172{
173 struct hfs_find_data fd;
174 struct super_block *sb = dir->i_sb;
175 struct inode *inode = NULL;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200176 struct hfsplus_inode_info *hip;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 int err;
178
179 if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
180 goto out;
181
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200182 inode = HFSPLUS_I(dir)->rsrc_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 if (inode)
184 goto out;
185
186 inode = new_inode(sb);
187 if (!inode)
188 return ERR_PTR(-ENOMEM);
189
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200190 hip = HFSPLUS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 inode->i_ino = dir->i_ino;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200192 INIT_LIST_HEAD(&hip->open_dir_list);
193 mutex_init(&hip->extents_lock);
Christoph Hellwigb33b7922010-11-23 14:38:13 +0100194 hip->extent_state = 0;
195 hip->flags = 0;
196 set_bit(HFSPLUS_I_RSRC, &hip->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200198 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
200 if (!err)
201 err = hfsplus_cat_read_inode(inode, &fd);
202 hfs_find_exit(&fd);
203 if (err) {
204 iput(inode);
205 return ERR_PTR(err);
206 }
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200207 hip->rsrc_inode = dir;
208 HFSPLUS_I(dir)->rsrc_inode = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 igrab(dir);
Christoph Hellwig58a818f2010-10-01 05:44:02 +0200210
211 /*
212 * __mark_inode_dirty expects inodes to be hashed. Since we don't
213 * want resource fork inodes in the regular inode space, we make them
214 * appear hashed, but do not put on any lists. hlist_del()
215 * will work fine and require no locking.
216 */
Al Viro756acc22010-10-23 15:23:40 -0400217 hlist_add_fake(&inode->i_hash);
Christoph Hellwig58a818f2010-10-01 05:44:02 +0200218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 mark_inode_dirty(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220out:
221 d_add(dentry, inode);
222 return NULL;
223}
224
225static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
226{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200227 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 u16 mode;
229
230 mode = be16_to_cpu(perms->mode);
231
232 inode->i_uid = be32_to_cpu(perms->owner);
233 if (!inode->i_uid && !mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200234 inode->i_uid = sbi->uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
236 inode->i_gid = be32_to_cpu(perms->group);
237 if (!inode->i_gid && !mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200238 inode->i_gid = sbi->gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
240 if (dir) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200241 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 mode |= S_IFDIR;
243 } else if (!mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200244 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 inode->i_mode = mode;
246
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200247 HFSPLUS_I(inode)->userflags = perms->userflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
249 inode->i_flags |= S_IMMUTABLE;
250 else
251 inode->i_flags &= ~S_IMMUTABLE;
252 if (perms->rootflags & HFSPLUS_FLG_APPEND)
253 inode->i_flags |= S_APPEND;
254 else
255 inode->i_flags &= ~S_APPEND;
256}
257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258static int hfsplus_file_open(struct inode *inode, struct file *file)
259{
260 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200261 inode = HFSPLUS_I(inode)->rsrc_inode;
Alan Cox6e715292008-10-18 20:28:01 -0700262 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
263 return -EOVERFLOW;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200264 atomic_inc(&HFSPLUS_I(inode)->opencnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 return 0;
266}
267
268static int hfsplus_file_release(struct inode *inode, struct file *file)
269{
270 struct super_block *sb = inode->i_sb;
271
272 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200273 inode = HFSPLUS_I(inode)->rsrc_inode;
274 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800275 mutex_lock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 hfsplus_file_truncate(inode);
277 if (inode->i_flags & S_DEAD) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200278 hfsplus_delete_cat(inode->i_ino,
279 HFSPLUS_SB(sb)->hidden_dir, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 hfsplus_delete_inode(inode);
281 }
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800282 mutex_unlock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 }
284 return 0;
285}
286
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200287static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
288{
289 struct inode *inode = dentry->d_inode;
290 int error;
291
292 error = inode_change_ok(inode, attr);
293 if (error)
294 return error;
Christoph Hellwig10257742010-06-04 11:30:02 +0200295
296 if ((attr->ia_valid & ATTR_SIZE) &&
297 attr->ia_size != i_size_read(inode)) {
298 error = vmtruncate(inode, attr->ia_size);
299 if (error)
300 return error;
301 }
302
303 setattr_copy(inode, attr);
304 mark_inode_dirty(inode);
305 return 0;
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200306}
307
Christoph Hellwigeb29d662010-11-23 14:38:10 +0100308int hfsplus_file_fsync(struct file *file, int datasync)
Al Virob5fc5102010-07-04 12:24:09 +0400309{
Christoph Hellwig28146972010-11-23 14:38:06 +0100310 struct inode *inode = file->f_mapping->host;
Christoph Hellwige3494702010-11-23 14:38:15 +0100311 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
Christoph Hellwig28146972010-11-23 14:38:06 +0100312 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
Christoph Hellwige3494702010-11-23 14:38:15 +0100313 int error = 0, error2;
Al Virob5fc5102010-07-04 12:24:09 +0400314
Christoph Hellwig28146972010-11-23 14:38:06 +0100315 /*
316 * Sync inode metadata into the catalog and extent trees.
317 */
318 sync_inode_metadata(inode, 1);
Al Virob5fc5102010-07-04 12:24:09 +0400319
Christoph Hellwig28146972010-11-23 14:38:06 +0100320 /*
321 * And explicitly write out the btrees.
322 */
Christoph Hellwige3494702010-11-23 14:38:15 +0100323 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
324 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
325
326 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
327 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
328 if (!error)
329 error = error2;
330 }
331
332 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
333 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
334 if (!error)
335 error = error2;
336 }
337
Christoph Hellwig34a2d312010-11-23 14:38:21 +0100338 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
339 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
340
Christoph Hellwig28146972010-11-23 14:38:06 +0100341 return error;
Al Virob5fc5102010-07-04 12:24:09 +0400342}
343
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800344static const struct inode_operations hfsplus_file_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 .lookup = hfsplus_file_lookup,
346 .truncate = hfsplus_file_truncate,
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200347 .setattr = hfsplus_setattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 .setxattr = hfsplus_setxattr,
349 .getxattr = hfsplus_getxattr,
350 .listxattr = hfsplus_listxattr,
351};
352
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800353static const struct file_operations hfsplus_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 .llseek = generic_file_llseek,
Badari Pulavarty543ade12006-09-30 23:28:48 -0700355 .read = do_sync_read,
356 .aio_read = generic_file_aio_read,
357 .write = do_sync_write,
358 .aio_write = generic_file_aio_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 .mmap = generic_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200360 .splice_read = generic_file_splice_read,
Al Virob5fc5102010-07-04 12:24:09 +0400361 .fsync = hfsplus_file_fsync,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 .open = hfsplus_file_open,
363 .release = hfsplus_file_release,
Arnd Bergmann7cc4bcc2010-04-27 16:24:20 +0200364 .unlocked_ioctl = hfsplus_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365};
366
367struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
368{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200369 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 struct inode *inode = new_inode(sb);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200371 struct hfsplus_inode_info *hip;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 if (!inode)
374 return NULL;
375
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200376 inode->i_ino = sbi->next_cnid++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 inode->i_mode = mode;
David Howells4ac84892008-11-14 10:38:54 +1100378 inode->i_uid = current_fsuid();
379 inode->i_gid = current_fsgid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 inode->i_nlink = 1;
381 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200382
383 hip = HFSPLUS_I(inode);
384 INIT_LIST_HEAD(&hip->open_dir_list);
385 mutex_init(&hip->extents_lock);
386 atomic_set(&hip->opencnt, 0);
Christoph Hellwigb33b7922010-11-23 14:38:13 +0100387 hip->extent_state = 0;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200388 hip->flags = 0;
389 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
390 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
391 hip->alloc_blocks = 0;
392 hip->first_blocks = 0;
393 hip->cached_start = 0;
394 hip->cached_blocks = 0;
395 hip->phys_size = 0;
396 hip->fs_blocks = 0;
397 hip->rsrc_inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 if (S_ISDIR(inode->i_mode)) {
399 inode->i_size = 2;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200400 sbi->folder_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 inode->i_op = &hfsplus_dir_inode_operations;
402 inode->i_fop = &hfsplus_dir_operations;
403 } else if (S_ISREG(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200404 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 inode->i_op = &hfsplus_file_inode_operations;
406 inode->i_fop = &hfsplus_file_operations;
407 inode->i_mapping->a_ops = &hfsplus_aops;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200408 hip->clump_blocks = sbi->data_clump_blocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 } else if (S_ISLNK(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200410 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 inode->i_op = &page_symlink_inode_operations;
412 inode->i_mapping->a_ops = &hfsplus_aops;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200413 hip->clump_blocks = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 } else
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200415 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 insert_inode_hash(inode);
417 mark_inode_dirty(inode);
418 sb->s_dirt = 1;
419
420 return inode;
421}
422
423void hfsplus_delete_inode(struct inode *inode)
424{
425 struct super_block *sb = inode->i_sb;
426
427 if (S_ISDIR(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200428 HFSPLUS_SB(sb)->folder_count--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 sb->s_dirt = 1;
430 return;
431 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200432 HFSPLUS_SB(sb)->file_count--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 if (S_ISREG(inode->i_mode)) {
434 if (!inode->i_nlink) {
435 inode->i_size = 0;
436 hfsplus_file_truncate(inode);
437 }
438 } else if (S_ISLNK(inode->i_mode)) {
439 inode->i_size = 0;
440 hfsplus_file_truncate(inode);
441 }
442 sb->s_dirt = 1;
443}
444
445void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
446{
447 struct super_block *sb = inode->i_sb;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200448 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200449 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 u32 count;
451 int i;
452
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200453 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 for (count = 0, i = 0; i < 8; i++)
455 count += be32_to_cpu(fork->extents[i].block_count);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200456 hip->first_blocks = count;
457 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
458 hip->cached_start = 0;
459 hip->cached_blocks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200461 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
462 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
463 hip->fs_blocks =
464 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
465 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
466 hip->clump_blocks =
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200467 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200468 if (!hip->clump_blocks) {
469 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200470 sbi->rsrc_clump_blocks :
471 sbi->data_clump_blocks;
472 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473}
474
475void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
476{
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200477 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 sizeof(hfsplus_extent_rec));
479 fork->total_size = cpu_to_be64(inode->i_size);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200480 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481}
482
483int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
484{
485 hfsplus_cat_entry entry;
486 int res = 0;
487 u16 type;
488
489 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
490
Christoph Hellwigf6089ff2010-10-14 09:54:28 -0400491 HFSPLUS_I(inode)->linkid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 if (type == HFSPLUS_FOLDER) {
493 struct hfsplus_cat_folder *folder = &entry.folder;
494
495 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
496 /* panic? */;
497 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
498 sizeof(struct hfsplus_cat_folder));
499 hfsplus_get_perms(inode, &folder->permissions, 1);
500 inode->i_nlink = 1;
501 inode->i_size = 2 + be32_to_cpu(folder->valence);
502 inode->i_atime = hfsp_mt2ut(folder->access_date);
503 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
Roman Zippel9a4cad92006-01-18 17:43:09 -0800504 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200505 HFSPLUS_I(inode)->create_date = folder->create_date;
506 HFSPLUS_I(inode)->fs_blocks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 inode->i_op = &hfsplus_dir_inode_operations;
508 inode->i_fop = &hfsplus_dir_operations;
509 } else if (type == HFSPLUS_FILE) {
510 struct hfsplus_cat_file *file = &entry.file;
511
512 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
513 /* panic? */;
514 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
515 sizeof(struct hfsplus_cat_file));
516
Christoph Hellwigb33b7922010-11-23 14:38:13 +0100517 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
518 &file->rsrc_fork : &file->data_fork);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 hfsplus_get_perms(inode, &file->permissions, 0);
520 inode->i_nlink = 1;
521 if (S_ISREG(inode->i_mode)) {
522 if (file->permissions.dev)
523 inode->i_nlink = be32_to_cpu(file->permissions.dev);
524 inode->i_op = &hfsplus_file_inode_operations;
525 inode->i_fop = &hfsplus_file_operations;
526 inode->i_mapping->a_ops = &hfsplus_aops;
527 } else if (S_ISLNK(inode->i_mode)) {
528 inode->i_op = &page_symlink_inode_operations;
529 inode->i_mapping->a_ops = &hfsplus_aops;
530 } else {
531 init_special_inode(inode, inode->i_mode,
532 be32_to_cpu(file->permissions.dev));
533 }
534 inode->i_atime = hfsp_mt2ut(file->access_date);
535 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
Roman Zippel9a4cad92006-01-18 17:43:09 -0800536 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200537 HFSPLUS_I(inode)->create_date = file->create_date;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 } else {
Roman Zippel634725a2006-01-18 17:43:05 -0800539 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 res = -EIO;
541 }
542 return res;
543}
544
545int hfsplus_cat_write_inode(struct inode *inode)
546{
547 struct inode *main_inode = inode;
548 struct hfs_find_data fd;
549 hfsplus_cat_entry entry;
550
551 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200552 main_inode = HFSPLUS_I(inode)->rsrc_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
554 if (!main_inode->i_nlink)
555 return 0;
556
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200557 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 /* panic? */
559 return -EIO;
560
561 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
562 /* panic? */
563 goto out;
564
565 if (S_ISDIR(main_inode->i_mode)) {
566 struct hfsplus_cat_folder *folder = &entry.folder;
567
568 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
569 /* panic? */;
570 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
571 sizeof(struct hfsplus_cat_folder));
572 /* simple node checks? */
Christoph Hellwig90e61692010-10-14 09:54:39 -0400573 hfsplus_cat_set_perms(inode, &folder->permissions);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 folder->access_date = hfsp_ut2mt(inode->i_atime);
575 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
576 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
577 folder->valence = cpu_to_be32(inode->i_size - 2);
578 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
579 sizeof(struct hfsplus_cat_folder));
580 } else if (HFSPLUS_IS_RSRC(inode)) {
581 struct hfsplus_cat_file *file = &entry.file;
582 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
583 sizeof(struct hfsplus_cat_file));
584 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
585 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
586 sizeof(struct hfsplus_cat_file));
587 } else {
588 struct hfsplus_cat_file *file = &entry.file;
589
590 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
591 /* panic? */;
592 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
593 sizeof(struct hfsplus_cat_file));
594 hfsplus_inode_write_fork(inode, &file->data_fork);
Christoph Hellwig90e61692010-10-14 09:54:39 -0400595 hfsplus_cat_set_perms(inode, &file->permissions);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
597 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
598 else
599 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
600 file->access_date = hfsp_ut2mt(inode->i_atime);
601 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
602 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
603 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
604 sizeof(struct hfsplus_cat_file));
605 }
Christoph Hellwige3494702010-11-23 14:38:15 +0100606
607 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608out:
609 hfs_find_exit(&fd);
610 return 0;
611}