blob: ce97a54518d81d8b904c7a01c336133516547eb3 [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);
37 init_MUTEX(&HFSPLUS_I(inode).extents_lock);
38 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
155static void hfsplus_write_super(struct super_block *sb)
156{
157 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
158
159 dprint(DBG_SUPER, "hfsplus_write_super\n");
160 sb->s_dirt = 0;
161 if (sb->s_flags & MS_RDONLY)
162 /* warn? */
163 return;
164
165 vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
166 vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
167 vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid);
168 vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count);
169 vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count);
170
171 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
172 if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) {
173 if (HFSPLUS_SB(sb).sect_count) {
174 struct buffer_head *bh;
175 u32 block, offset;
176
177 block = HFSPLUS_SB(sb).blockoffset;
178 block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9);
179 offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1);
Roman Zippel634725a2006-01-18 17:43:05 -0800180 printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 HFSPLUS_SB(sb).sect_count, block, offset);
182 bh = sb_bread(sb, block);
183 if (bh) {
184 vhdr = (struct hfsplus_vh *)(bh->b_data + offset);
185 if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) {
186 memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr));
187 mark_buffer_dirty(bh);
188 brelse(bh);
189 } else
Roman Zippel634725a2006-01-18 17:43:05 -0800190 printk(KERN_WARNING "hfs: backup not found!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 }
192 }
193 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
194 }
195}
196
197static void hfsplus_put_super(struct super_block *sb)
198{
199 dprint(DBG_SUPER, "hfsplus_put_super\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700200 if (!sb->s_fs_info)
201 return;
202 if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
204
205 vhdr->modify_date = hfsp_now2mt();
206 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
207 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
208 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
Jan Karae39f07c2005-09-06 15:19:16 -0700209 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 }
211
212 hfs_btree_close(HFSPLUS_SB(sb).cat_tree);
213 hfs_btree_close(HFSPLUS_SB(sb).ext_tree);
214 iput(HFSPLUS_SB(sb).alloc_file);
215 iput(HFSPLUS_SB(sb).hidden_dir);
216 brelse(HFSPLUS_SB(sb).s_vhbh);
217 if (HFSPLUS_SB(sb).nls)
218 unload_nls(HFSPLUS_SB(sb).nls);
Colin Leroy945b0922005-05-01 08:59:16 -0700219 kfree(sb->s_fs_info);
220 sb->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}
222
David Howells726c3342006-06-23 02:02:58 -0700223static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224{
David Howells726c3342006-06-23 02:02:58 -0700225 struct super_block *sb = dentry->d_sb;
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 buf->f_type = HFSPLUS_SUPER_MAGIC;
228 buf->f_bsize = sb->s_blocksize;
229 buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
230 buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
231 buf->f_bavail = buf->f_bfree;
232 buf->f_files = 0xFFFFFFFF;
233 buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
234 buf->f_namelen = HFSPLUS_MAX_STRLEN;
235
236 return 0;
237}
238
239static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
240{
241 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
242 return 0;
243 if (!(*flags & MS_RDONLY)) {
244 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800245 struct hfsplus_sb_info sbi;
246
247 memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
248 sbi.nls = HFSPLUS_SB(sb).nls;
249 if (!hfsplus_parse_options(data, &sbi))
250 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Roman Zippel634725a2006-01-18 17:43:05 -0800253 printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 "running fsck.hfsplus is recommended. leaving read-only.\n");
255 sb->s_flags |= MS_RDONLY;
256 *flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800257 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
258 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800260 printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 sb->s_flags |= MS_RDONLY;
262 *flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800263 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800264 printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800265 sb->s_flags |= MS_RDONLY;
266 *flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 }
268 }
269 return 0;
270}
271
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800272static const struct super_operations hfsplus_sops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 .alloc_inode = hfsplus_alloc_inode,
274 .destroy_inode = hfsplus_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 .write_inode = hfsplus_write_inode,
276 .clear_inode = hfsplus_clear_inode,
277 .put_super = hfsplus_put_super,
278 .write_super = hfsplus_write_super,
279 .statfs = hfsplus_statfs,
280 .remount_fs = hfsplus_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700281 .show_options = hfsplus_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282};
283
284static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
285{
286 struct hfsplus_vh *vhdr;
287 struct hfsplus_sb_info *sbi;
288 hfsplus_cat_entry entry;
289 struct hfs_find_data fd;
David Howells63525392008-02-07 00:15:40 -0800290 struct inode *root, *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 struct qstr str;
292 struct nls_table *nls = NULL;
293 int err = -EINVAL;
294
Wyatt Banksa5001a22007-07-15 23:40:50 -0700295 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 if (!sbi)
297 return -ENOMEM;
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 sb->s_fs_info = sbi;
300 INIT_HLIST_HEAD(&sbi->rsrc_inodes);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700301 hfsplus_fill_defaults(sbi);
302 if (!hfsplus_parse_options(data, sbi)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800303 printk(KERN_ERR "hfs: unable to parse mount options\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 err = -EINVAL;
305 goto cleanup;
306 }
307
308 /* temporarily use utf8 to correctly find the hidden dir below */
309 nls = sbi->nls;
310 sbi->nls = load_nls("utf8");
Joshua Kwanbd6a59b2006-01-06 00:09:45 -0800311 if (!sbi->nls) {
Roman Zippel634725a2006-01-18 17:43:05 -0800312 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 err = -EINVAL;
314 goto cleanup;
315 }
316
317 /* Grab the volume header */
318 if (hfsplus_read_wrapper(sb)) {
319 if (!silent)
Roman Zippel634725a2006-01-18 17:43:05 -0800320 printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 err = -EINVAL;
322 goto cleanup;
323 }
324 vhdr = HFSPLUS_SB(sb).s_vhdr;
325
326 /* Copy parts of the volume header into the superblock */
David Elliott2179d372006-01-18 17:43:08 -0800327 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
328 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
329 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
Roman Zippel634725a2006-01-18 17:43:05 -0800330 printk(KERN_ERR "hfs: wrong filesystem version\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 goto cleanup;
332 }
333 HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
334 HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
335 HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
336 HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
337 HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
338 HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
339 HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
340 if (!HFSPLUS_SB(sb).data_clump_blocks)
341 HFSPLUS_SB(sb).data_clump_blocks = 1;
342 HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
343 if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
344 HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
345
346 /* Set up operations so we can load metadata */
347 sb->s_op = &hfsplus_sops;
348 sb->s_maxbytes = MAX_LFS_FILESIZE;
349
350 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Roman Zippel634725a2006-01-18 17:43:05 -0800351 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
352 "running fsck.hfsplus is recommended. mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 sb->s_flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800354 } else if (sbi->flags & HFSPLUS_SB_FORCE) {
355 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800357 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 sb->s_flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800359 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Dave Jones355a4692008-04-29 16:01:22 -0400360 printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, "
Roman Zippel634725a2006-01-18 17:43:05 -0800361 "use the force option at your own risk, mounting read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800362 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 }
Roman Zippelb0b623c2005-11-29 19:34:41 -0800364 sbi->flags &= ~HFSPLUS_SB_FORCE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
366 /* Load metadata objects (B*Trees) */
367 HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
368 if (!HFSPLUS_SB(sb).ext_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800369 printk(KERN_ERR "hfs: failed to load extents file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 goto cleanup;
371 }
372 HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
373 if (!HFSPLUS_SB(sb).cat_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800374 printk(KERN_ERR "hfs: failed to load catalog file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 goto cleanup;
376 }
377
David Howells63525392008-02-07 00:15:40 -0800378 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
379 if (IS_ERR(inode)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800380 printk(KERN_ERR "hfs: failed to load allocation file\n");
David Howells63525392008-02-07 00:15:40 -0800381 err = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 goto cleanup;
383 }
David Howells63525392008-02-07 00:15:40 -0800384 HFSPLUS_SB(sb).alloc_file = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 /* Load the root directory */
David Howells63525392008-02-07 00:15:40 -0800387 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
388 if (IS_ERR(root)) {
389 printk(KERN_ERR "hfs: failed to load root directory\n");
390 err = PTR_ERR(root);
391 goto cleanup;
392 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 sb->s_root = d_alloc_root(root);
394 if (!sb->s_root) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 iput(root);
David Howells63525392008-02-07 00:15:40 -0800396 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 goto cleanup;
398 }
Duane Griffind45bce82007-07-15 23:41:23 -0700399 sb->s_root->d_op = &hfsplus_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
401 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
402 str.name = HFSP_HIDDENDIR_NAME;
403 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
404 hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
405 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
406 hfs_find_exit(&fd);
407 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
408 goto cleanup;
David Howells63525392008-02-07 00:15:40 -0800409 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
410 if (IS_ERR(inode)) {
411 err = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 goto cleanup;
David Howells63525392008-02-07 00:15:40 -0800413 }
414 HFSPLUS_SB(sb).hidden_dir = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 } else
416 hfs_find_exit(&fd);
417
418 if (sb->s_flags & MS_RDONLY)
419 goto out;
420
421 /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
422 * all three are registered with Apple for our use
423 */
424 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
425 vhdr->modify_date = hfsp_now2mt();
Marcin Slusarz20c79e72008-04-30 00:54:47 -0700426 be32_add_cpu(&vhdr->write_count, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
428 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
429 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
Jan Karae39f07c2005-09-06 15:19:16 -0700430 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432 if (!HFSPLUS_SB(sb).hidden_dir) {
Roman Zippel634725a2006-01-18 17:43:05 -0800433 printk(KERN_DEBUG "hfs: create hidden dir...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
435 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
436 &str, HFSPLUS_SB(sb).hidden_dir);
437 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
438 }
439out:
440 unload_nls(sbi->nls);
441 sbi->nls = nls;
442 return 0;
443
444cleanup:
445 hfsplus_put_super(sb);
446 if (nls)
447 unload_nls(nls);
448 return err;
449}
450
451MODULE_AUTHOR("Brad Boyer");
452MODULE_DESCRIPTION("Extended Macintosh Filesystem");
453MODULE_LICENSE("GPL");
454
Christoph Lametere18b8902006-12-06 20:33:20 -0800455static struct kmem_cache *hfsplus_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457static struct inode *hfsplus_alloc_inode(struct super_block *sb)
458{
459 struct hfsplus_inode_info *i;
460
Christoph Lametere94b1762006-12-06 20:33:17 -0800461 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 return i ? &i->vfs_inode : NULL;
463}
464
465static void hfsplus_destroy_inode(struct inode *inode)
466{
467 kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
468}
469
470#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
471
David Howells454e2392006-06-23 02:02:57 -0700472static int hfsplus_get_sb(struct file_system_type *fs_type,
473 int flags, const char *dev_name, void *data,
474 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475{
David Howells454e2392006-06-23 02:02:57 -0700476 return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
477 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478}
479
480static struct file_system_type hfsplus_fs_type = {
481 .owner = THIS_MODULE,
482 .name = "hfsplus",
483 .get_sb = hfsplus_get_sb,
484 .kill_sb = kill_block_super,
485 .fs_flags = FS_REQUIRES_DEV,
486};
487
Christoph Lameter4ba9b9d2007-10-16 23:25:51 -0700488static void hfsplus_init_once(struct kmem_cache *cachep, void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489{
490 struct hfsplus_inode_info *i = p;
491
Christoph Lametera35afb82007-05-16 22:10:57 -0700492 inode_init_once(&i->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493}
494
495static int __init init_hfsplus_fs(void)
496{
497 int err;
498
499 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
500 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900501 hfsplus_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 if (!hfsplus_inode_cachep)
503 return -ENOMEM;
504 err = register_filesystem(&hfsplus_fs_type);
505 if (err)
506 kmem_cache_destroy(hfsplus_inode_cachep);
507 return err;
508}
509
510static void __exit exit_hfsplus_fs(void)
511{
512 unregister_filesystem(&hfsplus_fs_type);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700513 kmem_cache_destroy(hfsplus_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514}
515
516module_init(init_hfsplus_fs)
517module_exit(exit_hfsplus_fs)