blob: 2e796f8302ffac30315530676585b05f49ab9cb7 [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>
Christoph Hellwige2e40f22015-02-22 08:58:50 -080017#include <linux/uio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19#include "hfsplus_fs.h"
20#include "hfsplus_raw.h"
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -080021#include "xattr.h"
Vyacheslav Dubeykob4c11072013-09-11 14:24:30 -070022#include "acl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
24static int hfsplus_readpage(struct file *file, struct page *page)
25{
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 return block_read_full_page(page, hfsplus_get_block);
27}
28
29static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
30{
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 return block_write_full_page(page, hfsplus_get_block, wbc);
32}
33
Marco Stornellid5068482012-12-15 11:55:07 +010034static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
35{
36 struct inode *inode = mapping->host;
37
38 if (to > inode->i_size) {
Kirill A. Shutemov7caef262013-09-12 15:13:56 -070039 truncate_pagecache(inode, inode->i_size);
Marco Stornellid5068482012-12-15 11:55:07 +010040 hfsplus_file_truncate(inode);
41 }
42}
43
Nick Piggin7c0efc62007-10-16 01:25:09 -070044static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
45 loff_t pos, unsigned len, unsigned flags,
46 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
Christoph Hellwig282dc172010-06-04 11:29:55 +020048 int ret;
49
Nick Piggin7c0efc62007-10-16 01:25:09 -070050 *pagep = NULL;
Christoph Hellwig282dc172010-06-04 11:29:55 +020051 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
Nick Piggin7c0efc62007-10-16 01:25:09 -070052 hfsplus_get_block,
Christoph Hellwig6af502d2010-10-01 05:43:31 +020053 &HFSPLUS_I(mapping->host)->phys_size);
Marco Stornellid5068482012-12-15 11:55:07 +010054 if (unlikely(ret))
55 hfsplus_write_failed(mapping, pos + len);
Christoph Hellwig282dc172010-06-04 11:29:55 +020056
57 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}
59
60static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
61{
62 return generic_block_bmap(mapping, block, hfsplus_get_block);
63}
64
Al Viro27496a82005-10-21 03:20:48 -040065static int hfsplus_releasepage(struct page *page, gfp_t mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
67 struct inode *inode = page->mapping->host;
68 struct super_block *sb = inode->i_sb;
69 struct hfs_btree *tree;
70 struct hfs_bnode *node;
71 u32 nidx;
72 int i, res = 1;
73
74 switch (inode->i_ino) {
75 case HFSPLUS_EXT_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020076 tree = HFSPLUS_SB(sb)->ext_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 break;
78 case HFSPLUS_CAT_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020079 tree = HFSPLUS_SB(sb)->cat_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 break;
81 case HFSPLUS_ATTR_CNID:
Christoph Hellwigdd73a012010-10-01 05:42:59 +020082 tree = HFSPLUS_SB(sb)->attr_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 break;
84 default:
85 BUG();
86 return 0;
87 }
Eric Sesterhenn70632242008-05-12 14:02:21 -070088 if (!tree)
89 return 0;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +030090 if (tree->node_size >= PAGE_SIZE) {
Anton Salikhmetov2753cc22010-12-16 18:08:38 +020091 nidx = page->index >>
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +030092 (tree->node_size_shift - PAGE_SHIFT);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 spin_lock(&tree->hash_lock);
94 node = hfs_bnode_findhash(tree, nidx);
95 if (!node)
96 ;
97 else if (atomic_read(&node->refcnt))
98 res = 0;
99 if (res && node) {
100 hfs_bnode_unhash(node);
101 hfs_bnode_free(node);
102 }
103 spin_unlock(&tree->hash_lock);
104 } else {
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200105 nidx = page->index <<
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300106 (PAGE_SHIFT - tree->node_size_shift);
107 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 spin_lock(&tree->hash_lock);
109 do {
110 node = hfs_bnode_findhash(tree, nidx++);
111 if (!node)
112 continue;
113 if (atomic_read(&node->refcnt)) {
114 res = 0;
115 break;
116 }
117 hfs_bnode_unhash(node);
118 hfs_bnode_free(node);
119 } while (--i && nidx < tree->node_count);
120 spin_unlock(&tree->hash_lock);
121 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 return res ? try_to_free_buffers(page) : 0;
123}
124
Christoph Hellwigc8b8e322016-04-07 08:51:58 -0700125static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126{
127 struct file *file = iocb->ki_filp;
Marco Stornellid5068482012-12-15 11:55:07 +0100128 struct address_space *mapping = file->f_mapping;
Al Viro93c76a32015-12-04 23:45:44 -0500129 struct inode *inode = mapping->host;
Al Viroa6cbcd42014-03-04 22:38:00 -0500130 size_t count = iov_iter_count(iter);
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200131 ssize_t ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Christoph Hellwigc8b8e322016-04-07 08:51:58 -0700133 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200134
135 /*
136 * In case of error extending write may have instantiated a few
137 * blocks outside i_size. Trim these off again.
138 */
Omar Sandoval6f673762015-03-16 04:33:52 -0700139 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200140 loff_t isize = i_size_read(inode);
Christoph Hellwigc8b8e322016-04-07 08:51:58 -0700141 loff_t end = iocb->ki_pos + count;
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200142
143 if (end > isize)
Marco Stornellid5068482012-12-15 11:55:07 +0100144 hfsplus_write_failed(mapping, end);
Christoph Hellwigeafdc7d2010-06-04 11:29:53 +0200145 }
146
147 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148}
149
150static int hfsplus_writepages(struct address_space *mapping,
151 struct writeback_control *wbc)
152{
153 return mpage_writepages(mapping, wbc, hfsplus_get_block);
154}
155
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700156const struct address_space_operations hfsplus_btree_aops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 .readpage = hfsplus_readpage,
158 .writepage = hfsplus_writepage,
Nick Piggin7c0efc62007-10-16 01:25:09 -0700159 .write_begin = hfsplus_write_begin,
160 .write_end = generic_write_end,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 .bmap = hfsplus_bmap,
162 .releasepage = hfsplus_releasepage,
163};
164
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700165const struct address_space_operations hfsplus_aops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 .readpage = hfsplus_readpage,
167 .writepage = hfsplus_writepage,
Nick Piggin7c0efc62007-10-16 01:25:09 -0700168 .write_begin = hfsplus_write_begin,
169 .write_end = generic_write_end,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 .bmap = hfsplus_bmap,
171 .direct_IO = hfsplus_direct_IO,
172 .writepages = hfsplus_writepages,
173};
174
Al Viroe16404e2009-02-20 05:55:13 +0000175const struct dentry_operations hfsplus_dentry_operations = {
Duane Griffind45bce82007-07-15 23:41:23 -0700176 .d_hash = hfsplus_hash_dentry,
177 .d_compare = hfsplus_compare_dentry,
178};
179
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200180static void hfsplus_get_perms(struct inode *inode,
181 struct hfsplus_perm *perms, int dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200183 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 u16 mode;
185
186 mode = be16_to_cpu(perms->mode);
187
Eric W. Biederman16525e32012-02-07 16:27:17 -0800188 i_uid_write(inode, be32_to_cpu(perms->owner));
189 if (!i_uid_read(inode) && !mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200190 inode->i_uid = sbi->uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Eric W. Biederman16525e32012-02-07 16:27:17 -0800192 i_gid_write(inode, be32_to_cpu(perms->group));
193 if (!i_gid_read(inode) && !mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200194 inode->i_gid = sbi->gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 if (dir) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200197 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 mode |= S_IFDIR;
199 } else if (!mode)
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200200 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 inode->i_mode = mode;
202
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200203 HFSPLUS_I(inode)->userflags = perms->userflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
205 inode->i_flags |= S_IMMUTABLE;
206 else
207 inode->i_flags &= ~S_IMMUTABLE;
208 if (perms->rootflags & HFSPLUS_FLG_APPEND)
209 inode->i_flags |= S_APPEND;
210 else
211 inode->i_flags &= ~S_APPEND;
212}
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214static int hfsplus_file_open(struct inode *inode, struct file *file)
215{
216 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200217 inode = HFSPLUS_I(inode)->rsrc_inode;
Alan Cox6e715292008-10-18 20:28:01 -0700218 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
219 return -EOVERFLOW;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200220 atomic_inc(&HFSPLUS_I(inode)->opencnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 return 0;
222}
223
224static int hfsplus_file_release(struct inode *inode, struct file *file)
225{
226 struct super_block *sb = inode->i_sb;
227
228 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200229 inode = HFSPLUS_I(inode)->rsrc_inode;
230 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
Al Viro59551022016-01-22 15:40:57 -0500231 inode_lock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 hfsplus_file_truncate(inode);
233 if (inode->i_flags & S_DEAD) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200234 hfsplus_delete_cat(inode->i_ino,
235 HFSPLUS_SB(sb)->hidden_dir, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 hfsplus_delete_inode(inode);
237 }
Al Viro59551022016-01-22 15:40:57 -0500238 inode_unlock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 }
240 return 0;
241}
242
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200243static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
244{
David Howells2b0143b2015-03-17 22:25:59 +0000245 struct inode *inode = d_inode(dentry);
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200246 int error;
247
Jan Kara31051c82016-05-26 16:55:18 +0200248 error = setattr_prepare(dentry, attr);
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200249 if (error)
250 return error;
Christoph Hellwig10257742010-06-04 11:30:02 +0200251
252 if ((attr->ia_valid & ATTR_SIZE) &&
253 attr->ia_size != i_size_read(inode)) {
Christoph Hellwig562c72a2011-06-24 14:29:45 -0400254 inode_dio_wait(inode);
Sergei Antonov059a7042015-04-16 12:47:15 -0700255 if (attr->ia_size > inode->i_size) {
256 error = generic_cont_expand_simple(inode,
257 attr->ia_size);
258 if (error)
259 return error;
260 }
Marco Stornellid5068482012-12-15 11:55:07 +0100261 truncate_setsize(inode, attr->ia_size);
262 hfsplus_file_truncate(inode);
Christoph Hellwig10257742010-06-04 11:30:02 +0200263 }
264
265 setattr_copy(inode, attr);
266 mark_inode_dirty(inode);
Vyacheslav Dubeykob4c11072013-09-11 14:24:30 -0700267
268 if (attr->ia_valid & ATTR_MODE) {
Christoph Hellwigb0a7ab52013-12-20 05:16:46 -0800269 error = posix_acl_chmod(inode, inode->i_mode);
Vyacheslav Dubeykob4c11072013-09-11 14:24:30 -0700270 if (unlikely(error))
271 return error;
272 }
273
Christoph Hellwig10257742010-06-04 11:30:02 +0200274 return 0;
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200275}
276
Josef Bacik02c24a82011-07-16 20:44:56 -0400277int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
278 int datasync)
Al Virob5fc5102010-07-04 12:24:09 +0400279{
Christoph Hellwig28146972010-11-23 14:38:06 +0100280 struct inode *inode = file->f_mapping->host;
Christoph Hellwige3494702010-11-23 14:38:15 +0100281 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
Christoph Hellwig28146972010-11-23 14:38:06 +0100282 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
Christoph Hellwige3494702010-11-23 14:38:15 +0100283 int error = 0, error2;
Al Virob5fc5102010-07-04 12:24:09 +0400284
Josef Bacik02c24a82011-07-16 20:44:56 -0400285 error = filemap_write_and_wait_range(inode->i_mapping, start, end);
286 if (error)
287 return error;
Al Viro59551022016-01-22 15:40:57 -0500288 inode_lock(inode);
Josef Bacik02c24a82011-07-16 20:44:56 -0400289
Christoph Hellwig28146972010-11-23 14:38:06 +0100290 /*
291 * Sync inode metadata into the catalog and extent trees.
292 */
293 sync_inode_metadata(inode, 1);
Al Virob5fc5102010-07-04 12:24:09 +0400294
Christoph Hellwig28146972010-11-23 14:38:06 +0100295 /*
296 * And explicitly write out the btrees.
297 */
Christoph Hellwige3494702010-11-23 14:38:15 +0100298 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
299 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
300
301 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200302 error2 =
303 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
Christoph Hellwige3494702010-11-23 14:38:15 +0100304 if (!error)
305 error = error2;
306 }
307
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800308 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
309 if (sbi->attr_tree) {
310 error2 =
311 filemap_write_and_wait(
312 sbi->attr_tree->inode->i_mapping);
313 if (!error)
314 error = error2;
315 } else {
Joe Perchesd6142672013-04-30 15:27:55 -0700316 pr_err("sync non-existent attributes tree\n");
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800317 }
318 }
319
Christoph Hellwige3494702010-11-23 14:38:15 +0100320 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
321 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
322 if (!error)
323 error = error2;
324 }
325
Christoph Hellwig34a2d312010-11-23 14:38:21 +0100326 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
327 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
328
Al Viro59551022016-01-22 15:40:57 -0500329 inode_unlock(inode);
Josef Bacik02c24a82011-07-16 20:44:56 -0400330
Christoph Hellwig28146972010-11-23 14:38:06 +0100331 return error;
Al Virob5fc5102010-07-04 12:24:09 +0400332}
333
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800334static const struct inode_operations hfsplus_file_inode_operations = {
Christoph Hellwigd39aae92010-06-04 11:29:59 +0200335 .setattr = hfsplus_setattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 .listxattr = hfsplus_listxattr,
Vyacheslav Dubeykob4c11072013-09-11 14:24:30 -0700337#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
338 .get_acl = hfsplus_get_posix_acl,
Christoph Hellwigb0a7ab52013-12-20 05:16:46 -0800339 .set_acl = hfsplus_set_posix_acl,
Vyacheslav Dubeykob4c11072013-09-11 14:24:30 -0700340#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341};
342
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800343static const struct file_operations hfsplus_file_operations = {
Anton Salikhmetov20b76432010-12-16 18:08:40 +0200344 .llseek = generic_file_llseek,
Al Viroaad4f8b2014-04-02 14:33:16 -0400345 .read_iter = generic_file_read_iter,
Al Viro81742022014-04-03 03:17:43 -0400346 .write_iter = generic_file_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 .mmap = generic_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200348 .splice_read = generic_file_splice_read,
Al Virob5fc5102010-07-04 12:24:09 +0400349 .fsync = hfsplus_file_fsync,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 .open = hfsplus_file_open,
351 .release = hfsplus_file_release,
Arnd Bergmann7cc4bcc2010-04-27 16:24:20 +0200352 .unlocked_ioctl = hfsplus_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353};
354
Al Viroc47da792011-07-26 03:26:51 -0400355struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200357 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 struct inode *inode = new_inode(sb);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200359 struct hfsplus_inode_info *hip;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 if (!inode)
362 return NULL;
363
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200364 inode->i_ino = sbi->next_cnid++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 inode->i_mode = mode;
David Howells4ac84892008-11-14 10:38:54 +1100366 inode->i_uid = current_fsuid();
367 inode->i_gid = current_fsgid();
Miklos Szeredibfe86842011-10-28 14:13:29 +0200368 set_nlink(inode, 1);
Deepa Dinamani02027d42016-09-14 07:48:05 -0700369 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200370
371 hip = HFSPLUS_I(inode);
372 INIT_LIST_HEAD(&hip->open_dir_list);
Al Viro323ee8f2016-05-12 20:02:09 -0400373 spin_lock_init(&hip->open_dir_lock);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200374 mutex_init(&hip->extents_lock);
375 atomic_set(&hip->opencnt, 0);
Christoph Hellwigb33b7922010-11-23 14:38:13 +0100376 hip->extent_state = 0;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200377 hip->flags = 0;
Matthew Garrettf3922382012-03-13 12:10:34 -0400378 hip->userflags = 0;
Sergei Antonovd7d673a2014-03-10 15:49:51 -0700379 hip->subfolders = 0;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200380 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
381 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
382 hip->alloc_blocks = 0;
383 hip->first_blocks = 0;
384 hip->cached_start = 0;
385 hip->cached_blocks = 0;
386 hip->phys_size = 0;
387 hip->fs_blocks = 0;
388 hip->rsrc_inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 if (S_ISDIR(inode->i_mode)) {
390 inode->i_size = 2;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200391 sbi->folder_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 inode->i_op = &hfsplus_dir_inode_operations;
393 inode->i_fop = &hfsplus_dir_operations;
394 } else if (S_ISREG(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200395 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 inode->i_op = &hfsplus_file_inode_operations;
397 inode->i_fop = &hfsplus_file_operations;
398 inode->i_mapping->a_ops = &hfsplus_aops;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200399 hip->clump_blocks = sbi->data_clump_blocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 } else if (S_ISLNK(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200401 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 inode->i_op = &page_symlink_inode_operations;
Al Viro21fc61c2015-11-17 01:07:57 -0500403 inode_nohighmem(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 inode->i_mapping->a_ops = &hfsplus_aops;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200405 hip->clump_blocks = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 } else
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200407 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 insert_inode_hash(inode);
409 mark_inode_dirty(inode);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300410 hfsplus_mark_mdb_dirty(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
412 return inode;
413}
414
415void hfsplus_delete_inode(struct inode *inode)
416{
417 struct super_block *sb = inode->i_sb;
418
419 if (S_ISDIR(inode->i_mode)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200420 HFSPLUS_SB(sb)->folder_count--;
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300421 hfsplus_mark_mdb_dirty(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 return;
423 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200424 HFSPLUS_SB(sb)->file_count--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 if (S_ISREG(inode->i_mode)) {
426 if (!inode->i_nlink) {
427 inode->i_size = 0;
428 hfsplus_file_truncate(inode);
429 }
430 } else if (S_ISLNK(inode->i_mode)) {
431 inode->i_size = 0;
432 hfsplus_file_truncate(inode);
433 }
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300434 hfsplus_mark_mdb_dirty(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435}
436
437void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
438{
439 struct super_block *sb = inode->i_sb;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200440 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200441 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 u32 count;
443 int i;
444
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200445 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 for (count = 0, i = 0; i < 8; i++)
447 count += be32_to_cpu(fork->extents[i].block_count);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200448 hip->first_blocks = count;
449 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
450 hip->cached_start = 0;
451 hip->cached_blocks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200453 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
454 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
455 hip->fs_blocks =
456 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
457 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
458 hip->clump_blocks =
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200459 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200460 if (!hip->clump_blocks) {
461 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200462 sbi->rsrc_clump_blocks :
463 sbi->data_clump_blocks;
464 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465}
466
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200467void hfsplus_inode_write_fork(struct inode *inode,
468 struct hfsplus_fork_raw *fork)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469{
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200470 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 sizeof(hfsplus_extent_rec));
472 fork->total_size = cpu_to_be64(inode->i_size);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200473 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474}
475
476int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
477{
478 hfsplus_cat_entry entry;
479 int res = 0;
480 u16 type;
481
482 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
483
Christoph Hellwigf6089ff2010-10-14 09:54:28 -0400484 HFSPLUS_I(inode)->linkid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 if (type == HFSPLUS_FOLDER) {
486 struct hfsplus_cat_folder *folder = &entry.folder;
487
488 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
489 /* panic? */;
490 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
491 sizeof(struct hfsplus_cat_folder));
492 hfsplus_get_perms(inode, &folder->permissions, 1);
Miklos Szeredibfe86842011-10-28 14:13:29 +0200493 set_nlink(inode, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 inode->i_size = 2 + be32_to_cpu(folder->valence);
495 inode->i_atime = hfsp_mt2ut(folder->access_date);
496 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
Roman Zippel9a4cad92006-01-18 17:43:09 -0800497 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200498 HFSPLUS_I(inode)->create_date = folder->create_date;
499 HFSPLUS_I(inode)->fs_blocks = 0;
Sergei Antonovd7d673a2014-03-10 15:49:51 -0700500 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
501 HFSPLUS_I(inode)->subfolders =
502 be32_to_cpu(folder->subfolders);
503 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 inode->i_op = &hfsplus_dir_inode_operations;
505 inode->i_fop = &hfsplus_dir_operations;
506 } else if (type == HFSPLUS_FILE) {
507 struct hfsplus_cat_file *file = &entry.file;
508
509 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
510 /* panic? */;
511 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
512 sizeof(struct hfsplus_cat_file));
513
Christoph Hellwigb33b7922010-11-23 14:38:13 +0100514 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
515 &file->rsrc_fork : &file->data_fork);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 hfsplus_get_perms(inode, &file->permissions, 0);
Miklos Szeredibfe86842011-10-28 14:13:29 +0200517 set_nlink(inode, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 if (S_ISREG(inode->i_mode)) {
519 if (file->permissions.dev)
Miklos Szeredibfe86842011-10-28 14:13:29 +0200520 set_nlink(inode,
521 be32_to_cpu(file->permissions.dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 inode->i_op = &hfsplus_file_inode_operations;
523 inode->i_fop = &hfsplus_file_operations;
524 inode->i_mapping->a_ops = &hfsplus_aops;
525 } else if (S_ISLNK(inode->i_mode)) {
526 inode->i_op = &page_symlink_inode_operations;
Al Viro21fc61c2015-11-17 01:07:57 -0500527 inode_nohighmem(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 inode->i_mapping->a_ops = &hfsplus_aops;
529 } else {
530 init_special_inode(inode, inode->i_mode,
531 be32_to_cpu(file->permissions.dev));
532 }
533 inode->i_atime = hfsp_mt2ut(file->access_date);
534 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
Roman Zippel9a4cad92006-01-18 17:43:09 -0800535 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200536 HFSPLUS_I(inode)->create_date = file->create_date;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 } else {
Joe Perchesd6142672013-04-30 15:27:55 -0700538 pr_err("bad catalog entry used to create inode\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 res = -EIO;
540 }
541 return res;
542}
543
544int hfsplus_cat_write_inode(struct inode *inode)
545{
546 struct inode *main_inode = inode;
547 struct hfs_find_data fd;
548 hfsplus_cat_entry entry;
549
550 if (HFSPLUS_IS_RSRC(inode))
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200551 main_inode = HFSPLUS_I(inode)->rsrc_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
553 if (!main_inode->i_nlink)
554 return 0;
555
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200556 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 /* panic? */
558 return -EIO;
559
560 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
561 /* panic? */
562 goto out;
563
564 if (S_ISDIR(main_inode->i_mode)) {
565 struct hfsplus_cat_folder *folder = &entry.folder;
566
567 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
568 /* panic? */;
569 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
570 sizeof(struct hfsplus_cat_folder));
571 /* simple node checks? */
Christoph Hellwig90e61692010-10-14 09:54:39 -0400572 hfsplus_cat_set_perms(inode, &folder->permissions);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 folder->access_date = hfsp_ut2mt(inode->i_atime);
574 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
575 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
576 folder->valence = cpu_to_be32(inode->i_size - 2);
Sergei Antonovd7d673a2014-03-10 15:49:51 -0700577 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
578 folder->subfolders =
579 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
580 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 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);
Christoph Hellwig90e61692010-10-14 09:54:39 -0400598 hfsplus_cat_set_perms(inode, &file->permissions);
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200599 if (HFSPLUS_FLG_IMMUTABLE &
600 (file->permissions.rootflags |
601 file->permissions.userflags))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
603 else
604 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
605 file->access_date = hfsp_ut2mt(inode->i_atime);
606 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
607 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
608 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
609 sizeof(struct hfsplus_cat_file));
610 }
Christoph Hellwige3494702010-11-23 14:38:15 +0100611
612 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613out:
614 hfs_find_exit(&fd);
615 return 0;
616}