blob: 74b473a8ef929f3c1abdd7ac85019ce4e87494ba [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>
Alexey Dobriyan405f5572009-07-11 22:08:37 +040015#include <linux/smp_lock.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
David Howells63525392008-02-07 00:15:40 -080024struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -070025{
26 struct hfs_find_data fd;
27 struct hfsplus_vh *vhdr;
David Howells63525392008-02-07 00:15:40 -080028 struct inode *inode;
29 long err = -EIO;
30
31 inode = iget_locked(sb, ino);
32 if (!inode)
33 return ERR_PTR(-ENOMEM);
34 if (!(inode->i_state & I_NEW))
35 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
Matthias Kaehlcke895c23f2008-07-25 01:46:36 -070038 mutex_init(&HFSPLUS_I(inode).extents_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 HFSPLUS_I(inode).flags = 0;
40 HFSPLUS_I(inode).rsrc_inode = NULL;
Peter Wainwright94c1d312005-10-26 01:59:02 -070041 atomic_set(&HFSPLUS_I(inode).opencnt, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
44 read_inode:
45 hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
46 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
47 if (!err)
48 err = hfsplus_cat_read_inode(inode, &fd);
49 hfs_find_exit(&fd);
50 if (err)
51 goto bad_inode;
David Howells63525392008-02-07 00:15:40 -080052 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 }
54 vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
55 switch(inode->i_ino) {
56 case HFSPLUS_ROOT_CNID:
57 goto read_inode;
58 case HFSPLUS_EXT_CNID:
59 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
60 inode->i_mapping->a_ops = &hfsplus_btree_aops;
61 break;
62 case HFSPLUS_CAT_CNID:
63 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
64 inode->i_mapping->a_ops = &hfsplus_btree_aops;
65 break;
66 case HFSPLUS_ALLOC_CNID:
67 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
68 inode->i_mapping->a_ops = &hfsplus_aops;
69 break;
70 case HFSPLUS_START_CNID:
71 hfsplus_inode_read_fork(inode, &vhdr->start_file);
72 break;
73 case HFSPLUS_ATTR_CNID:
74 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
75 inode->i_mapping->a_ops = &hfsplus_btree_aops;
76 break;
77 default:
78 goto bad_inode;
79 }
80
David Howells63525392008-02-07 00:15:40 -080081done:
82 unlock_new_inode(inode);
83 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
David Howells63525392008-02-07 00:15:40 -080085bad_inode:
86 iget_failed(inode);
87 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088}
89
Christoph Hellwiga9185b42010-03-05 09:21:37 +010090static int hfsplus_write_inode(struct inode *inode,
91 struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092{
93 struct hfsplus_vh *vhdr;
94 int ret = 0;
95
96 dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
97 hfsplus_ext_write_extent(inode);
98 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
99 return hfsplus_cat_write_inode(inode);
100 }
101 vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
102 switch (inode->i_ino) {
103 case HFSPLUS_ROOT_CNID:
104 ret = hfsplus_cat_write_inode(inode);
105 break;
106 case HFSPLUS_EXT_CNID:
107 if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) {
108 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
109 inode->i_sb->s_dirt = 1;
110 }
111 hfsplus_inode_write_fork(inode, &vhdr->ext_file);
112 hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree);
113 break;
114 case HFSPLUS_CAT_CNID:
115 if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) {
116 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
117 inode->i_sb->s_dirt = 1;
118 }
119 hfsplus_inode_write_fork(inode, &vhdr->cat_file);
120 hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree);
121 break;
122 case HFSPLUS_ALLOC_CNID:
123 if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) {
124 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
125 inode->i_sb->s_dirt = 1;
126 }
127 hfsplus_inode_write_fork(inode, &vhdr->alloc_file);
128 break;
129 case HFSPLUS_START_CNID:
130 if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) {
131 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
132 inode->i_sb->s_dirt = 1;
133 }
134 hfsplus_inode_write_fork(inode, &vhdr->start_file);
135 break;
136 case HFSPLUS_ATTR_CNID:
137 if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) {
138 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
139 inode->i_sb->s_dirt = 1;
140 }
141 hfsplus_inode_write_fork(inode, &vhdr->attr_file);
142 hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree);
143 break;
144 }
145 return ret;
146}
147
148static void hfsplus_clear_inode(struct inode *inode)
149{
150 dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 if (HFSPLUS_IS_RSRC(inode)) {
152 HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL;
153 iput(HFSPLUS_I(inode).rsrc_inode);
154 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155}
156
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200157static int hfsplus_sync_fs(struct super_block *sb, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158{
159 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
160
161 dprint(DBG_SUPER, "hfsplus_write_super\n");
Christoph Hellwigebc1ac12009-05-11 23:35:03 +0200162
163 lock_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 sb->s_dirt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166 vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
167 vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
168 vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid);
169 vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count);
170 vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count);
171
172 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
173 if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) {
174 if (HFSPLUS_SB(sb).sect_count) {
175 struct buffer_head *bh;
176 u32 block, offset;
177
178 block = HFSPLUS_SB(sb).blockoffset;
179 block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9);
180 offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1);
Roman Zippel634725a2006-01-18 17:43:05 -0800181 printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 HFSPLUS_SB(sb).sect_count, block, offset);
183 bh = sb_bread(sb, block);
184 if (bh) {
185 vhdr = (struct hfsplus_vh *)(bh->b_data + offset);
186 if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) {
187 memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr));
188 mark_buffer_dirty(bh);
189 brelse(bh);
190 } else
Roman Zippel634725a2006-01-18 17:43:05 -0800191 printk(KERN_WARNING "hfs: backup not found!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 }
193 }
194 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
195 }
Christoph Hellwigebc1ac12009-05-11 23:35:03 +0200196 unlock_super(sb);
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200197 return 0;
198}
199
200static void hfsplus_write_super(struct super_block *sb)
201{
202 if (!(sb->s_flags & MS_RDONLY))
203 hfsplus_sync_fs(sb, 1);
204 else
205 sb->s_dirt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206}
207
208static void hfsplus_put_super(struct super_block *sb)
209{
210 dprint(DBG_SUPER, "hfsplus_put_super\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700211 if (!sb->s_fs_info)
212 return;
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200213
214 lock_kernel();
215
Christoph Hellwig8c85e122009-04-28 18:00:26 +0200216 if (sb->s_dirt)
217 hfsplus_write_super(sb);
Colin Leroy945b0922005-05-01 08:59:16 -0700218 if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
220
221 vhdr->modify_date = hfsp_now2mt();
222 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
223 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
224 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
Jan Karae39f07c2005-09-06 15:19:16 -0700225 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 }
227
228 hfs_btree_close(HFSPLUS_SB(sb).cat_tree);
229 hfs_btree_close(HFSPLUS_SB(sb).ext_tree);
230 iput(HFSPLUS_SB(sb).alloc_file);
231 iput(HFSPLUS_SB(sb).hidden_dir);
232 brelse(HFSPLUS_SB(sb).s_vhbh);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000233 unload_nls(HFSPLUS_SB(sb).nls);
Colin Leroy945b0922005-05-01 08:59:16 -0700234 kfree(sb->s_fs_info);
235 sb->s_fs_info = NULL;
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200236
237 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
David Howells726c3342006-06-23 02:02:58 -0700240static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
David Howells726c3342006-06-23 02:02:58 -0700242 struct super_block *sb = dentry->d_sb;
Coly Li25564dd2009-04-02 16:59:36 -0700243 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 buf->f_type = HFSPLUS_SUPER_MAGIC;
246 buf->f_bsize = sb->s_blocksize;
247 buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
248 buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
249 buf->f_bavail = buf->f_bfree;
250 buf->f_files = 0xFFFFFFFF;
251 buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
Coly Li25564dd2009-04-02 16:59:36 -0700252 buf->f_fsid.val[0] = (u32)id;
253 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 buf->f_namelen = HFSPLUS_MAX_STRLEN;
255
256 return 0;
257}
258
259static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
260{
261 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
262 return 0;
263 if (!(*flags & MS_RDONLY)) {
264 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800265 struct hfsplus_sb_info sbi;
266
267 memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
268 sbi.nls = HFSPLUS_SB(sb).nls;
269 if (!hfsplus_parse_options(data, &sbi))
270 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Roman Zippel634725a2006-01-18 17:43:05 -0800273 printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 "running fsck.hfsplus is recommended. leaving read-only.\n");
275 sb->s_flags |= MS_RDONLY;
276 *flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800277 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
278 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800280 printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 sb->s_flags |= MS_RDONLY;
282 *flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800283 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800284 printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800285 sb->s_flags |= MS_RDONLY;
286 *flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 }
288 }
289 return 0;
290}
291
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800292static const struct super_operations hfsplus_sops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 .alloc_inode = hfsplus_alloc_inode,
294 .destroy_inode = hfsplus_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 .write_inode = hfsplus_write_inode,
296 .clear_inode = hfsplus_clear_inode,
297 .put_super = hfsplus_put_super,
298 .write_super = hfsplus_write_super,
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200299 .sync_fs = hfsplus_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 .statfs = hfsplus_statfs,
301 .remount_fs = hfsplus_remount,
Roman Zippel717dd802005-09-06 15:18:48 -0700302 .show_options = hfsplus_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303};
304
305static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
306{
307 struct hfsplus_vh *vhdr;
308 struct hfsplus_sb_info *sbi;
309 hfsplus_cat_entry entry;
310 struct hfs_find_data fd;
David Howells63525392008-02-07 00:15:40 -0800311 struct inode *root, *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 struct qstr str;
313 struct nls_table *nls = NULL;
314 int err = -EINVAL;
315
Wyatt Banksa5001a22007-07-15 23:40:50 -0700316 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 if (!sbi)
318 return -ENOMEM;
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 sb->s_fs_info = sbi;
321 INIT_HLIST_HEAD(&sbi->rsrc_inodes);
Roman Zippel717dd802005-09-06 15:18:48 -0700322 hfsplus_fill_defaults(sbi);
323 if (!hfsplus_parse_options(data, sbi)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800324 printk(KERN_ERR "hfs: unable to parse mount options\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 err = -EINVAL;
326 goto cleanup;
327 }
328
329 /* temporarily use utf8 to correctly find the hidden dir below */
330 nls = sbi->nls;
331 sbi->nls = load_nls("utf8");
Joshua Kwanbd6a59b2006-01-06 00:09:45 -0800332 if (!sbi->nls) {
Roman Zippel634725a2006-01-18 17:43:05 -0800333 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 err = -EINVAL;
335 goto cleanup;
336 }
337
338 /* Grab the volume header */
339 if (hfsplus_read_wrapper(sb)) {
340 if (!silent)
Roman Zippel634725a2006-01-18 17:43:05 -0800341 printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 err = -EINVAL;
343 goto cleanup;
344 }
345 vhdr = HFSPLUS_SB(sb).s_vhdr;
346
347 /* Copy parts of the volume header into the superblock */
David Elliott2179d372006-01-18 17:43:08 -0800348 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
349 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
350 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
Roman Zippel634725a2006-01-18 17:43:05 -0800351 printk(KERN_ERR "hfs: wrong filesystem version\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 goto cleanup;
353 }
354 HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
355 HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
356 HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
357 HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
358 HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
359 HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
360 HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
361 if (!HFSPLUS_SB(sb).data_clump_blocks)
362 HFSPLUS_SB(sb).data_clump_blocks = 1;
363 HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
364 if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
365 HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
366
367 /* Set up operations so we can load metadata */
368 sb->s_op = &hfsplus_sops;
369 sb->s_maxbytes = MAX_LFS_FILESIZE;
370
371 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Roman Zippel634725a2006-01-18 17:43:05 -0800372 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
373 "running fsck.hfsplus is recommended. mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 sb->s_flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800375 } else if (sbi->flags & HFSPLUS_SB_FORCE) {
376 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800378 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 sb->s_flags |= MS_RDONLY;
Mike Crowe81a73712008-10-15 22:04:05 -0700380 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) {
Dave Jones355a4692008-04-29 16:01:22 -0400381 printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, "
Roman Zippel634725a2006-01-18 17:43:05 -0800382 "use the force option at your own risk, mounting read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800383 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 }
Roman Zippelb0b623c2005-11-29 19:34:41 -0800385 sbi->flags &= ~HFSPLUS_SB_FORCE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
387 /* Load metadata objects (B*Trees) */
388 HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
389 if (!HFSPLUS_SB(sb).ext_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800390 printk(KERN_ERR "hfs: failed to load extents file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 goto cleanup;
392 }
393 HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
394 if (!HFSPLUS_SB(sb).cat_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800395 printk(KERN_ERR "hfs: failed to load catalog file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 goto cleanup;
397 }
398
David Howells63525392008-02-07 00:15:40 -0800399 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
400 if (IS_ERR(inode)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800401 printk(KERN_ERR "hfs: failed to load allocation file\n");
David Howells63525392008-02-07 00:15:40 -0800402 err = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 goto cleanup;
404 }
David Howells63525392008-02-07 00:15:40 -0800405 HFSPLUS_SB(sb).alloc_file = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407 /* Load the root directory */
David Howells63525392008-02-07 00:15:40 -0800408 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
409 if (IS_ERR(root)) {
410 printk(KERN_ERR "hfs: failed to load root directory\n");
411 err = PTR_ERR(root);
412 goto cleanup;
413 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 sb->s_root = d_alloc_root(root);
415 if (!sb->s_root) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 iput(root);
David Howells63525392008-02-07 00:15:40 -0800417 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 goto cleanup;
419 }
Duane Griffind45bce82007-07-15 23:41:23 -0700420 sb->s_root->d_op = &hfsplus_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
422 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
423 str.name = HFSP_HIDDENDIR_NAME;
424 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
425 hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
426 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
427 hfs_find_exit(&fd);
428 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
429 goto cleanup;
David Howells63525392008-02-07 00:15:40 -0800430 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
431 if (IS_ERR(inode)) {
432 err = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 goto cleanup;
David Howells63525392008-02-07 00:15:40 -0800434 }
435 HFSPLUS_SB(sb).hidden_dir = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 } else
437 hfs_find_exit(&fd);
438
439 if (sb->s_flags & MS_RDONLY)
440 goto out;
441
442 /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
443 * all three are registered with Apple for our use
444 */
445 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
446 vhdr->modify_date = hfsp_now2mt();
Marcin Slusarz20c79e72008-04-30 00:54:47 -0700447 be32_add_cpu(&vhdr->write_count, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
449 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
450 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
Jan Karae39f07c2005-09-06 15:19:16 -0700451 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
453 if (!HFSPLUS_SB(sb).hidden_dir) {
Roman Zippel634725a2006-01-18 17:43:05 -0800454 printk(KERN_DEBUG "hfs: create hidden dir...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
456 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
457 &str, HFSPLUS_SB(sb).hidden_dir);
458 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
459 }
460out:
461 unload_nls(sbi->nls);
462 sbi->nls = nls;
463 return 0;
464
465cleanup:
466 hfsplus_put_super(sb);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000467 unload_nls(nls);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 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)