blob: c106ca22e81260ece215747e90a63acded0f864b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/hfsplus/super.c
3 *
4 * Copyright (C) 2001
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
7 *
8 */
9
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/pagemap.h>
Christoph Hellwig34a2d312010-11-23 14:38:21 +010013#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/vfs.h>
17#include <linux/nls.h>
18
19static struct inode *hfsplus_alloc_inode(struct super_block *sb);
20static void hfsplus_destroy_inode(struct inode *inode);
21
22#include "hfsplus_fs.h"
23
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020024static int hfsplus_system_read_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070025{
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020026 struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
David Howells63525392008-02-07 00:15:40 -080027
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020028 switch (inode->i_ino) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 case HFSPLUS_EXT_CNID:
30 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
31 inode->i_mapping->a_ops = &hfsplus_btree_aops;
32 break;
33 case HFSPLUS_CAT_CNID:
34 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
35 inode->i_mapping->a_ops = &hfsplus_btree_aops;
36 break;
37 case HFSPLUS_ALLOC_CNID:
38 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
39 inode->i_mapping->a_ops = &hfsplus_aops;
40 break;
41 case HFSPLUS_START_CNID:
42 hfsplus_inode_read_fork(inode, &vhdr->start_file);
43 break;
44 case HFSPLUS_ATTR_CNID:
45 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
46 inode->i_mapping->a_ops = &hfsplus_btree_aops;
47 break;
48 default:
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020049 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 }
51
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020052 return 0;
53}
54
55struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
56{
57 struct hfs_find_data fd;
58 struct inode *inode;
59 int err;
60
61 inode = iget_locked(sb, ino);
62 if (!inode)
63 return ERR_PTR(-ENOMEM);
64 if (!(inode->i_state & I_NEW))
65 return inode;
66
67 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
68 mutex_init(&HFSPLUS_I(inode)->extents_lock);
69 HFSPLUS_I(inode)->flags = 0;
Christoph Hellwigb33b7922010-11-23 14:38:13 +010070 HFSPLUS_I(inode)->extent_state = 0;
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020071 HFSPLUS_I(inode)->rsrc_inode = NULL;
72 atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
73
74 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
75 inode->i_ino == HFSPLUS_ROOT_CNID) {
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +040076 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
77 if (!err) {
78 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
79 if (!err)
80 err = hfsplus_cat_read_inode(inode, &fd);
81 hfs_find_exit(&fd);
82 }
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020083 } else {
84 err = hfsplus_system_read_inode(inode);
85 }
86
87 if (err) {
88 iget_failed(inode);
89 return ERR_PTR(err);
90 }
91
David Howells63525392008-02-07 00:15:40 -080092 unlock_new_inode(inode);
93 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094}
95
Christoph Hellwigb5080f72010-10-01 05:43:43 +020096static int hfsplus_system_write_inode(struct inode *inode)
97{
98 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
99 struct hfsplus_vh *vhdr = sbi->s_vhdr;
100 struct hfsplus_fork_raw *fork;
101 struct hfs_btree *tree = NULL;
102
103 switch (inode->i_ino) {
104 case HFSPLUS_EXT_CNID:
105 fork = &vhdr->ext_file;
106 tree = sbi->ext_tree;
107 break;
108 case HFSPLUS_CAT_CNID:
109 fork = &vhdr->cat_file;
110 tree = sbi->cat_tree;
111 break;
112 case HFSPLUS_ALLOC_CNID:
113 fork = &vhdr->alloc_file;
114 break;
115 case HFSPLUS_START_CNID:
116 fork = &vhdr->start_file;
117 break;
118 case HFSPLUS_ATTR_CNID:
119 fork = &vhdr->attr_file;
120 tree = sbi->attr_tree;
121 default:
122 return -EIO;
123 }
124
125 if (fork->total_size != cpu_to_be64(inode->i_size)) {
Christoph Hellwig84adede2010-10-01 05:45:20 +0200126 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200127 inode->i_sb->s_dirt = 1;
128 }
129 hfsplus_inode_write_fork(inode, fork);
130 if (tree)
131 hfs_btree_write(tree);
132 return 0;
133}
134
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100135static int hfsplus_write_inode(struct inode *inode,
136 struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137{
Alexey Khoroshilovdd7f3d52011-07-06 02:30:00 +0400138 int err;
139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200141
Alexey Khoroshilovdd7f3d52011-07-06 02:30:00 +0400142 err = hfsplus_ext_write_extent(inode);
143 if (err)
144 return err;
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200145
146 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
147 inode->i_ino == HFSPLUS_ROOT_CNID)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 return hfsplus_cat_write_inode(inode);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200149 else
150 return hfsplus_system_write_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151}
152
Al Virob57922d2010-06-07 14:34:48 -0400153static void hfsplus_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
Al Virob57922d2010-06-07 14:34:48 -0400155 dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
156 truncate_inode_pages(&inode->i_data, 0);
157 end_writeback(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 if (HFSPLUS_IS_RSRC(inode)) {
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200159 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
160 iput(HFSPLUS_I(inode)->rsrc_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162}
163
Al Virob5fc5102010-07-04 12:24:09 +0400164int hfsplus_sync_fs(struct super_block *sb, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200166 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
167 struct hfsplus_vh *vhdr = sbi->s_vhdr;
Christoph Hellwig52399b12010-11-23 14:37:47 +0100168 int write_backup = 0;
169 int error, error2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Christoph Hellwigf02e26f2010-11-23 14:38:02 +0100171 if (!wait)
172 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174 dprint(DBG_SUPER, "hfsplus_write_super\n");
Christoph Hellwigebc1ac12009-05-11 23:35:03 +0200175
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 sb->s_dirt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100178 /*
179 * Explicitly write out the special metadata inodes.
180 *
181 * While these special inodes are marked as hashed and written
182 * out peridocically by the flusher threads we redirty them
183 * during writeout of normal inodes, and thus the life lock
184 * prevents us from getting the latest state to disk.
185 */
186 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
187 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
188 if (!error)
189 error = error2;
190 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
191 if (!error)
192 error = error2;
193
Christoph Hellwig52399b12010-11-23 14:37:47 +0100194 mutex_lock(&sbi->vh_mutex);
195 mutex_lock(&sbi->alloc_mutex);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200196 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200197 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
198 vhdr->folder_count = cpu_to_be32(sbi->folder_count);
199 vhdr->file_count = cpu_to_be32(sbi->file_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Christoph Hellwig84adede2010-10-01 05:45:20 +0200201 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
Christoph Hellwig52399b12010-11-23 14:37:47 +0100202 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
203 write_backup = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 }
Christoph Hellwig52399b12010-11-23 14:37:47 +0100205
Seth Forshee65965282011-07-18 08:06:23 -0700206 error2 = hfsplus_submit_bio(sb,
Christoph Hellwig52399b12010-11-23 14:37:47 +0100207 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
Seth Forshee65965282011-07-18 08:06:23 -0700208 sbi->s_vhdr_buf, NULL, WRITE_SYNC);
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100209 if (!error)
210 error = error2;
Christoph Hellwig52399b12010-11-23 14:37:47 +0100211 if (!write_backup)
212 goto out;
213
Seth Forshee65965282011-07-18 08:06:23 -0700214 error2 = hfsplus_submit_bio(sb,
Christoph Hellwig52399b12010-11-23 14:37:47 +0100215 sbi->part_start + sbi->sect_count - 2,
Seth Forshee65965282011-07-18 08:06:23 -0700216 sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC);
Christoph Hellwig52399b12010-11-23 14:37:47 +0100217 if (!error)
218 error2 = error;
219out:
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200220 mutex_unlock(&sbi->alloc_mutex);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200221 mutex_unlock(&sbi->vh_mutex);
Christoph Hellwig34a2d312010-11-23 14:38:21 +0100222
223 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
224 blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
225
Christoph Hellwig52399b12010-11-23 14:37:47 +0100226 return error;
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200227}
228
229static void hfsplus_write_super(struct super_block *sb)
230{
231 if (!(sb->s_flags & MS_RDONLY))
232 hfsplus_sync_fs(sb, 1);
233 else
234 sb->s_dirt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
237static void hfsplus_put_super(struct super_block *sb)
238{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200239 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 dprint(DBG_SUPER, "hfsplus_put_super\n");
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200242
Colin Leroy945b0922005-05-01 08:59:16 -0700243 if (!sb->s_fs_info)
244 return;
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200245
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200246 if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) {
247 struct hfsplus_vh *vhdr = sbi->s_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249 vhdr->modify_date = hfsp_now2mt();
250 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
251 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
Christoph Hellwig3b5ce8a2010-11-23 14:37:43 +0100252
253 hfsplus_sync_fs(sb, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 }
255
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200256 hfs_btree_close(sbi->cat_tree);
257 hfs_btree_close(sbi->ext_tree);
258 iput(sbi->alloc_file);
259 iput(sbi->hidden_dir);
Seth Forshee65965282011-07-18 08:06:23 -0700260 kfree(sbi->s_vhdr_buf);
261 kfree(sbi->s_backup_vhdr_buf);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200262 unload_nls(sbi->nls);
Colin Leroy945b0922005-05-01 08:59:16 -0700263 kfree(sb->s_fs_info);
264 sb->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265}
266
David Howells726c3342006-06-23 02:02:58 -0700267static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
David Howells726c3342006-06-23 02:02:58 -0700269 struct super_block *sb = dentry->d_sb;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200270 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Coly Li25564dd2009-04-02 16:59:36 -0700271 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 buf->f_type = HFSPLUS_SUPER_MAGIC;
274 buf->f_bsize = sb->s_blocksize;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200275 buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
276 buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 buf->f_bavail = buf->f_bfree;
278 buf->f_files = 0xFFFFFFFF;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200279 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
Coly Li25564dd2009-04-02 16:59:36 -0700280 buf->f_fsid.val[0] = (u32)id;
281 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 buf->f_namelen = HFSPLUS_MAX_STRLEN;
283
284 return 0;
285}
286
287static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
288{
289 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
290 return 0;
291 if (!(*flags & MS_RDONLY)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200292 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr;
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100293 int force = 0;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800294
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100295 if (!hfsplus_parse_options_remount(data, &force))
Roman Zippelb0b623c2005-11-29 19:34:41 -0800296 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
298 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200299 printk(KERN_WARNING "hfs: filesystem was "
300 "not cleanly unmounted, "
301 "running fsck.hfsplus is recommended. "
302 "leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 sb->s_flags |= MS_RDONLY;
304 *flags |= MS_RDONLY;
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100305 } else if (force) {
Roman Zippelb0b623c2005-11-29 19:34:41 -0800306 /* nothing */
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200307 } else if (vhdr->attributes &
308 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
309 printk(KERN_WARNING "hfs: filesystem is marked locked, "
310 "leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 sb->s_flags |= MS_RDONLY;
312 *flags |= MS_RDONLY;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200313 } else if (vhdr->attributes &
314 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
315 printk(KERN_WARNING "hfs: filesystem is "
316 "marked journaled, "
317 "leaving read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800318 sb->s_flags |= MS_RDONLY;
319 *flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 }
321 }
322 return 0;
323}
324
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800325static const struct super_operations hfsplus_sops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 .alloc_inode = hfsplus_alloc_inode,
327 .destroy_inode = hfsplus_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 .write_inode = hfsplus_write_inode,
Al Virob57922d2010-06-07 14:34:48 -0400329 .evict_inode = hfsplus_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 .put_super = hfsplus_put_super,
331 .write_super = hfsplus_write_super,
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200332 .sync_fs = hfsplus_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 .statfs = hfsplus_statfs,
334 .remount_fs = hfsplus_remount,
Roman Zippel717dd802005-09-06 15:18:48 -0700335 .show_options = hfsplus_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336};
337
338static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
339{
340 struct hfsplus_vh *vhdr;
341 struct hfsplus_sb_info *sbi;
342 hfsplus_cat_entry entry;
343 struct hfs_find_data fd;
David Howells63525392008-02-07 00:15:40 -0800344 struct inode *root, *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 struct qstr str;
346 struct nls_table *nls = NULL;
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700347 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700349 err = -EINVAL;
Wyatt Banksa5001a22007-07-15 23:40:50 -0700350 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 if (!sbi)
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700352 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 sb->s_fs_info = sbi;
Christoph Hellwig40bf48a2010-10-01 05:41:39 +0200355 mutex_init(&sbi->alloc_mutex);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200356 mutex_init(&sbi->vh_mutex);
Roman Zippel717dd802005-09-06 15:18:48 -0700357 hfsplus_fill_defaults(sbi);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700358
359 err = -EINVAL;
Roman Zippel717dd802005-09-06 15:18:48 -0700360 if (!hfsplus_parse_options(data, sbi)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800361 printk(KERN_ERR "hfs: unable to parse mount options\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700362 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 }
364
365 /* temporarily use utf8 to correctly find the hidden dir below */
366 nls = sbi->nls;
367 sbi->nls = load_nls("utf8");
Joshua Kwanbd6a59b2006-01-06 00:09:45 -0800368 if (!sbi->nls) {
Roman Zippel634725a2006-01-18 17:43:05 -0800369 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700370 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 }
372
373 /* Grab the volume header */
374 if (hfsplus_read_wrapper(sb)) {
375 if (!silent)
Roman Zippel634725a2006-01-18 17:43:05 -0800376 printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700377 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200379 vhdr = sbi->s_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381 /* Copy parts of the volume header into the superblock */
David Elliott2179d372006-01-18 17:43:08 -0800382 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
383 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
384 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
Roman Zippel634725a2006-01-18 17:43:05 -0800385 printk(KERN_ERR "hfs: wrong filesystem version\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700386 goto out_free_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200388 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
389 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200390 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
391 sbi->file_count = be32_to_cpu(vhdr->file_count);
392 sbi->folder_count = be32_to_cpu(vhdr->folder_count);
393 sbi->data_clump_blocks =
394 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
395 if (!sbi->data_clump_blocks)
396 sbi->data_clump_blocks = 1;
397 sbi->rsrc_clump_blocks =
398 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
399 if (!sbi->rsrc_clump_blocks)
400 sbi->rsrc_clump_blocks = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
Christoph Hellwigc6d5f5f2011-02-16 09:34:26 +0100402 err = generic_check_addressable(sbi->alloc_blksz_shift,
403 sbi->total_blocks);
404 if (err) {
405 printk(KERN_ERR "hfs: filesystem size too large.\n");
406 goto out_free_vhdr;
407 }
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 /* Set up operations so we can load metadata */
410 sb->s_op = &hfsplus_sops;
411 sb->s_maxbytes = MAX_LFS_FILESIZE;
412
413 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200414 printk(KERN_WARNING "hfs: Filesystem was "
415 "not cleanly unmounted, "
416 "running fsck.hfsplus is recommended. "
417 "mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 sb->s_flags |= MS_RDONLY;
Christoph Hellwig84adede2010-10-01 05:45:20 +0200419 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
Roman Zippelb0b623c2005-11-29 19:34:41 -0800420 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800422 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 sb->s_flags |= MS_RDONLY;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200424 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) &&
425 !(sb->s_flags & MS_RDONLY)) {
426 printk(KERN_WARNING "hfs: write access to "
427 "a journaled filesystem is not supported, "
428 "use the force option at your own risk, "
429 "mounting read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800430 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 }
432
Christoph Hellwigc6d5f5f2011-02-16 09:34:26 +0100433 err = -EINVAL;
434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 /* Load metadata objects (B*Trees) */
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200436 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
437 if (!sbi->ext_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800438 printk(KERN_ERR "hfs: failed to load extents file\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700439 goto out_free_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200441 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
442 if (!sbi->cat_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800443 printk(KERN_ERR "hfs: failed to load catalog file\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700444 goto out_close_ext_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 }
446
David Howells63525392008-02-07 00:15:40 -0800447 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
448 if (IS_ERR(inode)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800449 printk(KERN_ERR "hfs: failed to load allocation file\n");
David Howells63525392008-02-07 00:15:40 -0800450 err = PTR_ERR(inode);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700451 goto out_close_cat_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200453 sbi->alloc_file = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
455 /* Load the root directory */
David Howells63525392008-02-07 00:15:40 -0800456 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
457 if (IS_ERR(root)) {
458 printk(KERN_ERR "hfs: failed to load root directory\n");
459 err = PTR_ERR(root);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700460 goto out_put_alloc_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 }
462
463 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
464 str.name = HFSP_HIDDENDIR_NAME;
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +0400465 err = hfs_find_init(sbi->cat_tree, &fd);
466 if (err)
467 goto out_put_root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
469 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
470 hfs_find_exit(&fd);
471 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700472 goto out_put_root;
David Howells63525392008-02-07 00:15:40 -0800473 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
474 if (IS_ERR(inode)) {
475 err = PTR_ERR(inode);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700476 goto out_put_root;
David Howells63525392008-02-07 00:15:40 -0800477 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200478 sbi->hidden_dir = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 } else
480 hfs_find_exit(&fd);
481
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700482 if (!(sb->s_flags & MS_RDONLY)) {
483 /*
484 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
485 * all three are registered with Apple for our use
486 */
487 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
488 vhdr->modify_date = hfsp_now2mt();
489 be32_add_cpu(&vhdr->write_count, 1);
490 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
491 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
492 hfsplus_sync_fs(sb, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700494 if (!sbi->hidden_dir) {
495 mutex_lock(&sbi->vh_mutex);
496 sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
497 hfsplus_create_cat(sbi->hidden_dir->i_ino, root, &str,
498 sbi->hidden_dir);
499 mutex_unlock(&sbi->vh_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700501 hfsplus_mark_inode_dirty(sbi->hidden_dir,
502 HFSPLUS_I_CAT_DIRTY);
503 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 }
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700505
506 sb->s_d_op = &hfsplus_dentry_operations;
507 sb->s_root = d_alloc_root(root);
508 if (!sb->s_root) {
509 err = -ENOMEM;
510 goto out_put_hidden_dir;
511 }
512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 unload_nls(sbi->nls);
514 sbi->nls = nls;
515 return 0;
516
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700517out_put_hidden_dir:
518 iput(sbi->hidden_dir);
519out_put_root:
Alexey Khoroshilov032016a2011-06-24 01:15:02 +0400520 iput(root);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700521out_put_alloc_file:
522 iput(sbi->alloc_file);
523out_close_cat_tree:
524 hfs_btree_close(sbi->cat_tree);
525out_close_ext_tree:
526 hfs_btree_close(sbi->ext_tree);
527out_free_vhdr:
528 kfree(sbi->s_vhdr);
529 kfree(sbi->s_backup_vhdr);
530out_unload_nls:
531 unload_nls(sbi->nls);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000532 unload_nls(nls);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700533 kfree(sbi);
534out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 return err;
536}
537
538MODULE_AUTHOR("Brad Boyer");
539MODULE_DESCRIPTION("Extended Macintosh Filesystem");
540MODULE_LICENSE("GPL");
541
Christoph Lametere18b8902006-12-06 20:33:20 -0800542static struct kmem_cache *hfsplus_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
544static struct inode *hfsplus_alloc_inode(struct super_block *sb)
545{
546 struct hfsplus_inode_info *i;
547
Christoph Lametere94b1762006-12-06 20:33:17 -0800548 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 return i ? &i->vfs_inode : NULL;
550}
551
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100552static void hfsplus_i_callback(struct rcu_head *head)
553{
554 struct inode *inode = container_of(head, struct inode, i_rcu);
555
556 INIT_LIST_HEAD(&inode->i_dentry);
557 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
558}
559
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560static void hfsplus_destroy_inode(struct inode *inode)
561{
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100562 call_rcu(&inode->i_rcu, hfsplus_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563}
564
565#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
566
Al Viro152a0832010-07-25 00:46:55 +0400567static struct dentry *hfsplus_mount(struct file_system_type *fs_type,
568 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569{
Al Viro152a0832010-07-25 00:46:55 +0400570 return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571}
572
573static struct file_system_type hfsplus_fs_type = {
574 .owner = THIS_MODULE,
575 .name = "hfsplus",
Al Viro152a0832010-07-25 00:46:55 +0400576 .mount = hfsplus_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 .kill_sb = kill_block_super,
578 .fs_flags = FS_REQUIRES_DEV,
579};
580
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700581static void hfsplus_init_once(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582{
583 struct hfsplus_inode_info *i = p;
584
Christoph Lametera35afb82007-05-16 22:10:57 -0700585 inode_init_once(&i->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586}
587
588static int __init init_hfsplus_fs(void)
589{
590 int err;
591
592 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
593 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900594 hfsplus_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 if (!hfsplus_inode_cachep)
596 return -ENOMEM;
597 err = register_filesystem(&hfsplus_fs_type);
598 if (err)
599 kmem_cache_destroy(hfsplus_inode_cachep);
600 return err;
601}
602
603static void __exit exit_hfsplus_fs(void)
604{
605 unregister_filesystem(&hfsplus_fs_type);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700606 kmem_cache_destroy(hfsplus_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607}
608
609module_init(init_hfsplus_fs)
610module_exit(exit_hfsplus_fs)