blob: 9fc3af0c0dab6cd5b58af0f8a0cb0d0019ed9011 [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>
13#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/vfs.h>
16#include <linux/nls.h>
17
18static struct inode *hfsplus_alloc_inode(struct super_block *sb);
19static void hfsplus_destroy_inode(struct inode *inode);
20
21#include "hfsplus_fs.h"
22
David Howells63525392008-02-07 00:15:40 -080023struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -070024{
25 struct hfs_find_data fd;
26 struct hfsplus_vh *vhdr;
David Howells63525392008-02-07 00:15:40 -080027 struct inode *inode;
28 long err = -EIO;
29
30 inode = iget_locked(sb, ino);
31 if (!inode)
32 return ERR_PTR(-ENOMEM);
33 if (!(inode->i_state & I_NEW))
34 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
Matthias Kaehlcke895c23f2008-07-25 01:46:36 -070037 mutex_init(&HFSPLUS_I(inode).extents_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 HFSPLUS_I(inode).flags = 0;
39 HFSPLUS_I(inode).rsrc_inode = NULL;
Peter Wainwright94c1d312005-10-26 01:59:02 -070040 atomic_set(&HFSPLUS_I(inode).opencnt, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
43 read_inode:
44 hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
45 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
46 if (!err)
47 err = hfsplus_cat_read_inode(inode, &fd);
48 hfs_find_exit(&fd);
49 if (err)
50 goto bad_inode;
David Howells63525392008-02-07 00:15:40 -080051 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 }
53 vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
54 switch(inode->i_ino) {
55 case HFSPLUS_ROOT_CNID:
56 goto read_inode;
57 case HFSPLUS_EXT_CNID:
58 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
59 inode->i_mapping->a_ops = &hfsplus_btree_aops;
60 break;
61 case HFSPLUS_CAT_CNID:
62 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
63 inode->i_mapping->a_ops = &hfsplus_btree_aops;
64 break;
65 case HFSPLUS_ALLOC_CNID:
66 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
67 inode->i_mapping->a_ops = &hfsplus_aops;
68 break;
69 case HFSPLUS_START_CNID:
70 hfsplus_inode_read_fork(inode, &vhdr->start_file);
71 break;
72 case HFSPLUS_ATTR_CNID:
73 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
74 inode->i_mapping->a_ops = &hfsplus_btree_aops;
75 break;
76 default:
77 goto bad_inode;
78 }
79
David Howells63525392008-02-07 00:15:40 -080080done:
81 unlock_new_inode(inode);
82 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
David Howells63525392008-02-07 00:15:40 -080084bad_inode:
85 iget_failed(inode);
86 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087}
88
89static int hfsplus_write_inode(struct inode *inode, int unused)
90{
91 struct hfsplus_vh *vhdr;
92 int ret = 0;
93
94 dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
95 hfsplus_ext_write_extent(inode);
96 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
97 return hfsplus_cat_write_inode(inode);
98 }
99 vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
100 switch (inode->i_ino) {
101 case HFSPLUS_ROOT_CNID:
102 ret = hfsplus_cat_write_inode(inode);
103 break;
104 case HFSPLUS_EXT_CNID:
105 if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) {
106 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
107 inode->i_sb->s_dirt = 1;
108 }
109 hfsplus_inode_write_fork(inode, &vhdr->ext_file);
110 hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree);
111 break;
112 case HFSPLUS_CAT_CNID:
113 if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) {
114 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
115 inode->i_sb->s_dirt = 1;
116 }
117 hfsplus_inode_write_fork(inode, &vhdr->cat_file);
118 hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree);
119 break;
120 case HFSPLUS_ALLOC_CNID:
121 if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) {
122 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
123 inode->i_sb->s_dirt = 1;
124 }
125 hfsplus_inode_write_fork(inode, &vhdr->alloc_file);
126 break;
127 case HFSPLUS_START_CNID:
128 if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) {
129 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
130 inode->i_sb->s_dirt = 1;
131 }
132 hfsplus_inode_write_fork(inode, &vhdr->start_file);
133 break;
134 case HFSPLUS_ATTR_CNID:
135 if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) {
136 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
137 inode->i_sb->s_dirt = 1;
138 }
139 hfsplus_inode_write_fork(inode, &vhdr->attr_file);
140 hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree);
141 break;
142 }
143 return ret;
144}
145
146static void hfsplus_clear_inode(struct inode *inode)
147{
148 dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 if (HFSPLUS_IS_RSRC(inode)) {
150 HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL;
151 iput(HFSPLUS_I(inode).rsrc_inode);
152 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153}
154
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200155static int hfsplus_sync_fs(struct super_block *sb, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156{
157 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
158
159 dprint(DBG_SUPER, "hfsplus_write_super\n");
Christoph Hellwigebc1ac12009-05-11 23:35:03 +0200160
161 lock_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 sb->s_dirt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
165 vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
166 vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid);
167 vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count);
168 vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count);
169
170 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
171 if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) {
172 if (HFSPLUS_SB(sb).sect_count) {
173 struct buffer_head *bh;
174 u32 block, offset;
175
176 block = HFSPLUS_SB(sb).blockoffset;
177 block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9);
178 offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1);
Roman Zippel634725a2006-01-18 17:43:05 -0800179 printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 HFSPLUS_SB(sb).sect_count, block, offset);
181 bh = sb_bread(sb, block);
182 if (bh) {
183 vhdr = (struct hfsplus_vh *)(bh->b_data + offset);
184 if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) {
185 memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr));
186 mark_buffer_dirty(bh);
187 brelse(bh);
188 } else
Roman Zippel634725a2006-01-18 17:43:05 -0800189 printk(KERN_WARNING "hfs: backup not found!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 }
191 }
192 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
193 }
Christoph Hellwigebc1ac12009-05-11 23:35:03 +0200194 unlock_super(sb);
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200195 return 0;
196}
197
198static void hfsplus_write_super(struct super_block *sb)
199{
200 if (!(sb->s_flags & MS_RDONLY))
201 hfsplus_sync_fs(sb, 1);
202 else
203 sb->s_dirt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204}
205
206static void hfsplus_put_super(struct super_block *sb)
207{
208 dprint(DBG_SUPER, "hfsplus_put_super\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700209 if (!sb->s_fs_info)
210 return;
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200211
212 lock_kernel();
213
Christoph Hellwig8c85e122009-04-28 18:00:26 +0200214 if (sb->s_dirt)
215 hfsplus_write_super(sb);
Colin Leroy945b0922005-05-01 08:59:16 -0700216 if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
218
219 vhdr->modify_date = hfsp_now2mt();
220 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
221 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
222 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
Jan Karae39f07c2005-09-06 15:19:16 -0700223 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 }
225
226 hfs_btree_close(HFSPLUS_SB(sb).cat_tree);
227 hfs_btree_close(HFSPLUS_SB(sb).ext_tree);
228 iput(HFSPLUS_SB(sb).alloc_file);
229 iput(HFSPLUS_SB(sb).hidden_dir);
230 brelse(HFSPLUS_SB(sb).s_vhbh);
231 if (HFSPLUS_SB(sb).nls)
232 unload_nls(HFSPLUS_SB(sb).nls);
Colin Leroy945b0922005-05-01 08:59:16 -0700233 kfree(sb->s_fs_info);
234 sb->s_fs_info = NULL;
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200235
236 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237}
238
David Howells726c3342006-06-23 02:02:58 -0700239static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240{
David Howells726c3342006-06-23 02:02:58 -0700241 struct super_block *sb = dentry->d_sb;
Coly Li25564dd2009-04-02 16:59:36 -0700242 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 buf->f_type = HFSPLUS_SUPER_MAGIC;
245 buf->f_bsize = sb->s_blocksize;
246 buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
247 buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
248 buf->f_bavail = buf->f_bfree;
249 buf->f_files = 0xFFFFFFFF;
250 buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
Coly Li25564dd2009-04-02 16:59:36 -0700251 buf->f_fsid.val[0] = (u32)id;
252 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 buf->f_namelen = HFSPLUS_MAX_STRLEN;
254
255 return 0;
256}
257
258static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
259{
260 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
261 return 0;
262 if (!(*flags & MS_RDONLY)) {
263 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800264 struct hfsplus_sb_info sbi;
265
266 memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
267 sbi.nls = HFSPLUS_SB(sb).nls;
268 if (!hfsplus_parse_options(data, &sbi))
269 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Roman Zippel634725a2006-01-18 17:43:05 -0800272 printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 "running fsck.hfsplus is recommended. leaving read-only.\n");
274 sb->s_flags |= MS_RDONLY;
275 *flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800276 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
277 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800279 printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 sb->s_flags |= MS_RDONLY;
281 *flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800282 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800283 printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800284 sb->s_flags |= MS_RDONLY;
285 *flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 }
287 }
288 return 0;
289}
290
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800291static const struct super_operations hfsplus_sops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 .alloc_inode = hfsplus_alloc_inode,
293 .destroy_inode = hfsplus_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 .write_inode = hfsplus_write_inode,
295 .clear_inode = hfsplus_clear_inode,
296 .put_super = hfsplus_put_super,
297 .write_super = hfsplus_write_super,
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200298 .sync_fs = hfsplus_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 .statfs = hfsplus_statfs,
300 .remount_fs = hfsplus_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700301 .show_options = hfsplus_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302};
303
304static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
305{
306 struct hfsplus_vh *vhdr;
307 struct hfsplus_sb_info *sbi;
308 hfsplus_cat_entry entry;
309 struct hfs_find_data fd;
David Howells63525392008-02-07 00:15:40 -0800310 struct inode *root, *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 struct qstr str;
312 struct nls_table *nls = NULL;
313 int err = -EINVAL;
314
Wyatt Banksa5001a22007-07-15 23:40:50 -0700315 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 if (!sbi)
317 return -ENOMEM;
318
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 sb->s_fs_info = sbi;
320 INIT_HLIST_HEAD(&sbi->rsrc_inodes);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700321 hfsplus_fill_defaults(sbi);
322 if (!hfsplus_parse_options(data, sbi)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800323 printk(KERN_ERR "hfs: unable to parse mount options\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 err = -EINVAL;
325 goto cleanup;
326 }
327
328 /* temporarily use utf8 to correctly find the hidden dir below */
329 nls = sbi->nls;
330 sbi->nls = load_nls("utf8");
Joshua Kwanbd6a59b2006-01-06 00:09:45 -0800331 if (!sbi->nls) {
Roman Zippel634725a2006-01-18 17:43:05 -0800332 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 err = -EINVAL;
334 goto cleanup;
335 }
336
337 /* Grab the volume header */
338 if (hfsplus_read_wrapper(sb)) {
339 if (!silent)
Roman Zippel634725a2006-01-18 17:43:05 -0800340 printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 err = -EINVAL;
342 goto cleanup;
343 }
344 vhdr = HFSPLUS_SB(sb).s_vhdr;
345
346 /* Copy parts of the volume header into the superblock */
David Elliott2179d372006-01-18 17:43:08 -0800347 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
348 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
349 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
Roman Zippel634725a2006-01-18 17:43:05 -0800350 printk(KERN_ERR "hfs: wrong filesystem version\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 goto cleanup;
352 }
353 HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
354 HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
355 HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
356 HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
357 HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
358 HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
359 HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
360 if (!HFSPLUS_SB(sb).data_clump_blocks)
361 HFSPLUS_SB(sb).data_clump_blocks = 1;
362 HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
363 if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
364 HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
365
366 /* Set up operations so we can load metadata */
367 sb->s_op = &hfsplus_sops;
368 sb->s_maxbytes = MAX_LFS_FILESIZE;
369
370 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Roman Zippel634725a2006-01-18 17:43:05 -0800371 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
372 "running fsck.hfsplus is recommended. mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 sb->s_flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800374 } else if (sbi->flags & HFSPLUS_SB_FORCE) {
375 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800377 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 sb->s_flags |= MS_RDONLY;
Mike Crowe81a73712008-10-15 22:04:05 -0700379 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) {
Dave Jones355a4692008-04-29 16:01:22 -0400380 printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, "
Roman Zippel634725a2006-01-18 17:43:05 -0800381 "use the force option at your own risk, mounting read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800382 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 }
Roman Zippelb0b623c2005-11-29 19:34:41 -0800384 sbi->flags &= ~HFSPLUS_SB_FORCE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 /* Load metadata objects (B*Trees) */
387 HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
388 if (!HFSPLUS_SB(sb).ext_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800389 printk(KERN_ERR "hfs: failed to load extents file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 goto cleanup;
391 }
392 HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
393 if (!HFSPLUS_SB(sb).cat_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800394 printk(KERN_ERR "hfs: failed to load catalog file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 goto cleanup;
396 }
397
David Howells63525392008-02-07 00:15:40 -0800398 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
399 if (IS_ERR(inode)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800400 printk(KERN_ERR "hfs: failed to load allocation file\n");
David Howells63525392008-02-07 00:15:40 -0800401 err = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 goto cleanup;
403 }
David Howells63525392008-02-07 00:15:40 -0800404 HFSPLUS_SB(sb).alloc_file = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
406 /* Load the root directory */
David Howells63525392008-02-07 00:15:40 -0800407 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
408 if (IS_ERR(root)) {
409 printk(KERN_ERR "hfs: failed to load root directory\n");
410 err = PTR_ERR(root);
411 goto cleanup;
412 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 sb->s_root = d_alloc_root(root);
414 if (!sb->s_root) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 iput(root);
David Howells63525392008-02-07 00:15:40 -0800416 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 goto cleanup;
418 }
Duane Griffind45bce82007-07-15 23:41:23 -0700419 sb->s_root->d_op = &hfsplus_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
421 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
422 str.name = HFSP_HIDDENDIR_NAME;
423 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
424 hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
425 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
426 hfs_find_exit(&fd);
427 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
428 goto cleanup;
David Howells63525392008-02-07 00:15:40 -0800429 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
430 if (IS_ERR(inode)) {
431 err = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 goto cleanup;
David Howells63525392008-02-07 00:15:40 -0800433 }
434 HFSPLUS_SB(sb).hidden_dir = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 } else
436 hfs_find_exit(&fd);
437
438 if (sb->s_flags & MS_RDONLY)
439 goto out;
440
441 /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
442 * all three are registered with Apple for our use
443 */
444 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
445 vhdr->modify_date = hfsp_now2mt();
Marcin Slusarz20c79e72008-04-30 00:54:47 -0700446 be32_add_cpu(&vhdr->write_count, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
448 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
449 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
Jan Karae39f07c2005-09-06 15:19:16 -0700450 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 if (!HFSPLUS_SB(sb).hidden_dir) {
Roman Zippel634725a2006-01-18 17:43:05 -0800453 printk(KERN_DEBUG "hfs: create hidden dir...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
455 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
456 &str, HFSPLUS_SB(sb).hidden_dir);
457 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
458 }
459out:
460 unload_nls(sbi->nls);
461 sbi->nls = nls;
462 return 0;
463
464cleanup:
465 hfsplus_put_super(sb);
466 if (nls)
467 unload_nls(nls);
468 return err;
469}
470
471MODULE_AUTHOR("Brad Boyer");
472MODULE_DESCRIPTION("Extended Macintosh Filesystem");
473MODULE_LICENSE("GPL");
474
Christoph Lametere18b8902006-12-06 20:33:20 -0800475static struct kmem_cache *hfsplus_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
477static struct inode *hfsplus_alloc_inode(struct super_block *sb)
478{
479 struct hfsplus_inode_info *i;
480
Christoph Lametere94b1762006-12-06 20:33:17 -0800481 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 return i ? &i->vfs_inode : NULL;
483}
484
485static void hfsplus_destroy_inode(struct inode *inode)
486{
487 kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
488}
489
490#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
491
David Howells454e2392006-06-23 02:02:57 -0700492static int hfsplus_get_sb(struct file_system_type *fs_type,
493 int flags, const char *dev_name, void *data,
494 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495{
David Howells454e2392006-06-23 02:02:57 -0700496 return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
497 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498}
499
500static struct file_system_type hfsplus_fs_type = {
501 .owner = THIS_MODULE,
502 .name = "hfsplus",
503 .get_sb = hfsplus_get_sb,
504 .kill_sb = kill_block_super,
505 .fs_flags = FS_REQUIRES_DEV,
506};
507
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700508static void hfsplus_init_once(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509{
510 struct hfsplus_inode_info *i = p;
511
Christoph Lametera35afb82007-05-16 22:10:57 -0700512 inode_init_once(&i->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513}
514
515static int __init init_hfsplus_fs(void)
516{
517 int err;
518
519 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
520 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900521 hfsplus_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if (!hfsplus_inode_cachep)
523 return -ENOMEM;
524 err = register_filesystem(&hfsplus_fs_type);
525 if (err)
526 kmem_cache_destroy(hfsplus_inode_cachep);
527 return err;
528}
529
530static void __exit exit_hfsplus_fs(void)
531{
532 unregister_filesystem(&hfsplus_fs_type);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700533 kmem_cache_destroy(hfsplus_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534}
535
536module_init(init_hfsplus_fs)
537module_exit(exit_hfsplus_fs)