blob: 593af2fdcc2dafec8574caa59d970365aede5239 [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"
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -080023#include "xattr.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020025static int hfsplus_system_read_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070026{
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020027 struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
David Howells63525392008-02-07 00:15:40 -080028
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020029 switch (inode->i_ino) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 case HFSPLUS_EXT_CNID:
31 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
32 inode->i_mapping->a_ops = &hfsplus_btree_aops;
33 break;
34 case HFSPLUS_CAT_CNID:
35 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
36 inode->i_mapping->a_ops = &hfsplus_btree_aops;
37 break;
38 case HFSPLUS_ALLOC_CNID:
39 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
40 inode->i_mapping->a_ops = &hfsplus_aops;
41 break;
42 case HFSPLUS_START_CNID:
43 hfsplus_inode_read_fork(inode, &vhdr->start_file);
44 break;
45 case HFSPLUS_ATTR_CNID:
46 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
47 inode->i_mapping->a_ops = &hfsplus_btree_aops;
48 break;
49 default:
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020050 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 }
52
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020053 return 0;
54}
55
56struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
57{
58 struct hfs_find_data fd;
59 struct inode *inode;
60 int err;
61
62 inode = iget_locked(sb, ino);
63 if (!inode)
64 return ERR_PTR(-ENOMEM);
65 if (!(inode->i_state & I_NEW))
66 return inode;
67
68 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
69 mutex_init(&HFSPLUS_I(inode)->extents_lock);
70 HFSPLUS_I(inode)->flags = 0;
Christoph Hellwigb33b7922010-11-23 14:38:13 +010071 HFSPLUS_I(inode)->extent_state = 0;
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020072 HFSPLUS_I(inode)->rsrc_inode = NULL;
73 atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
74
75 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
76 inode->i_ino == HFSPLUS_ROOT_CNID) {
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +040077 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
78 if (!err) {
79 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
80 if (!err)
81 err = hfsplus_cat_read_inode(inode, &fd);
82 hfs_find_exit(&fd);
83 }
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020084 } else {
85 err = hfsplus_system_read_inode(inode);
86 }
87
88 if (err) {
89 iget_failed(inode);
90 return ERR_PTR(err);
91 }
92
David Howells63525392008-02-07 00:15:40 -080093 unlock_new_inode(inode);
94 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095}
96
Christoph Hellwigb5080f72010-10-01 05:43:43 +020097static int hfsplus_system_write_inode(struct inode *inode)
98{
99 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
100 struct hfsplus_vh *vhdr = sbi->s_vhdr;
101 struct hfsplus_fork_raw *fork;
102 struct hfs_btree *tree = NULL;
103
104 switch (inode->i_ino) {
105 case HFSPLUS_EXT_CNID:
106 fork = &vhdr->ext_file;
107 tree = sbi->ext_tree;
108 break;
109 case HFSPLUS_CAT_CNID:
110 fork = &vhdr->cat_file;
111 tree = sbi->cat_tree;
112 break;
113 case HFSPLUS_ALLOC_CNID:
114 fork = &vhdr->alloc_file;
115 break;
116 case HFSPLUS_START_CNID:
117 fork = &vhdr->start_file;
118 break;
119 case HFSPLUS_ATTR_CNID:
120 fork = &vhdr->attr_file;
121 tree = sbi->attr_tree;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800122 break;
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200123 default:
124 return -EIO;
125 }
126
127 if (fork->total_size != cpu_to_be64(inode->i_size)) {
Christoph Hellwig84adede2010-10-01 05:45:20 +0200128 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300129 hfsplus_mark_mdb_dirty(inode->i_sb);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200130 }
131 hfsplus_inode_write_fork(inode, fork);
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800132 if (tree) {
133 int err = hfs_btree_write(tree);
Fabian Frederickb73f3d02014-06-06 14:36:31 -0700134
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800135 if (err) {
Joe Perchesd6142672013-04-30 15:27:55 -0700136 pr_err("b-tree write err: %d, ino %lu\n",
Fabian Frederickb73f3d02014-06-06 14:36:31 -0700137 err, inode->i_ino);
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800138 return err;
139 }
140 }
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200141 return 0;
142}
143
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100144static int hfsplus_write_inode(struct inode *inode,
145 struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
Alexey Khoroshilovdd7f3d52011-07-06 02:30:00 +0400147 int err;
148
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700149 hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200150
Alexey Khoroshilovdd7f3d52011-07-06 02:30:00 +0400151 err = hfsplus_ext_write_extent(inode);
152 if (err)
153 return err;
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200154
155 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
156 inode->i_ino == HFSPLUS_ROOT_CNID)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 return hfsplus_cat_write_inode(inode);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200158 else
159 return hfsplus_system_write_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160}
161
Al Virob57922d2010-06-07 14:34:48 -0400162static void hfsplus_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163{
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700164 hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700165 truncate_inode_pages_final(&inode->i_data);
Jan Karadbd57682012-05-03 14:48:02 +0200166 clear_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 if (HFSPLUS_IS_RSRC(inode)) {
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200168 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
169 iput(HFSPLUS_I(inode)->rsrc_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171}
172
Artem Bityutskiy0a818612012-07-12 17:26:28 +0300173static int hfsplus_sync_fs(struct super_block *sb, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200175 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
176 struct hfsplus_vh *vhdr = sbi->s_vhdr;
Christoph Hellwig52399b12010-11-23 14:37:47 +0100177 int write_backup = 0;
178 int error, error2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Christoph Hellwigf02e26f2010-11-23 14:38:02 +0100180 if (!wait)
181 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700183 hfs_dbg(SUPER, "hfsplus_sync_fs\n");
Christoph Hellwigebc1ac12009-05-11 23:35:03 +0200184
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100185 /*
186 * Explicitly write out the special metadata inodes.
187 *
188 * While these special inodes are marked as hashed and written
189 * out peridocically by the flusher threads we redirty them
190 * during writeout of normal inodes, and thus the life lock
191 * prevents us from getting the latest state to disk.
192 */
193 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
194 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
195 if (!error)
196 error = error2;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800197 if (sbi->attr_tree) {
198 error2 =
199 filemap_write_and_wait(sbi->attr_tree->inode->i_mapping);
200 if (!error)
201 error = error2;
202 }
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100203 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
204 if (!error)
205 error = error2;
206
Christoph Hellwig52399b12010-11-23 14:37:47 +0100207 mutex_lock(&sbi->vh_mutex);
208 mutex_lock(&sbi->alloc_mutex);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200209 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200210 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
211 vhdr->folder_count = cpu_to_be32(sbi->folder_count);
212 vhdr->file_count = cpu_to_be32(sbi->file_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Christoph Hellwig84adede2010-10-01 05:45:20 +0200214 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
Christoph Hellwig52399b12010-11-23 14:37:47 +0100215 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
216 write_backup = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 }
Christoph Hellwig52399b12010-11-23 14:37:47 +0100218
Seth Forshee65965282011-07-18 08:06:23 -0700219 error2 = hfsplus_submit_bio(sb,
Christoph Hellwig52399b12010-11-23 14:37:47 +0100220 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
Seth Forshee65965282011-07-18 08:06:23 -0700221 sbi->s_vhdr_buf, NULL, WRITE_SYNC);
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100222 if (!error)
223 error = error2;
Christoph Hellwig52399b12010-11-23 14:37:47 +0100224 if (!write_backup)
225 goto out;
226
Seth Forshee65965282011-07-18 08:06:23 -0700227 error2 = hfsplus_submit_bio(sb,
Christoph Hellwig52399b12010-11-23 14:37:47 +0100228 sbi->part_start + sbi->sect_count - 2,
Seth Forshee65965282011-07-18 08:06:23 -0700229 sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC);
Christoph Hellwig52399b12010-11-23 14:37:47 +0100230 if (!error)
231 error2 = error;
232out:
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200233 mutex_unlock(&sbi->alloc_mutex);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200234 mutex_unlock(&sbi->vh_mutex);
Christoph Hellwig34a2d312010-11-23 14:38:21 +0100235
236 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
237 blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
238
Christoph Hellwig52399b12010-11-23 14:37:47 +0100239 return error;
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200240}
241
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300242static void delayed_sync_fs(struct work_struct *work)
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200243{
Vyacheslav Dubeykobffdd662012-12-20 15:05:29 -0800244 int err;
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300245 struct hfsplus_sb_info *sbi;
246
247 sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
248
249 spin_lock(&sbi->work_lock);
250 sbi->work_queued = 0;
251 spin_unlock(&sbi->work_lock);
252
Vyacheslav Dubeykobffdd662012-12-20 15:05:29 -0800253 err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
254 if (err)
Joe Perchesd6142672013-04-30 15:27:55 -0700255 pr_err("delayed sync fs err %d\n", err);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300256}
257
258void hfsplus_mark_mdb_dirty(struct super_block *sb)
259{
260 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
261 unsigned long delay;
262
263 if (sb->s_flags & MS_RDONLY)
264 return;
265
266 spin_lock(&sbi->work_lock);
267 if (!sbi->work_queued) {
268 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
269 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
270 sbi->work_queued = 1;
271 }
272 spin_unlock(&sbi->work_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273}
274
275static void hfsplus_put_super(struct super_block *sb)
276{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200277 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
278
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700279 hfs_dbg(SUPER, "hfsplus_put_super\n");
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200280
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300281 cancel_delayed_work_sync(&sbi->sync_work);
282
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200283 if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) {
284 struct hfsplus_vh *vhdr = sbi->s_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286 vhdr->modify_date = hfsp_now2mt();
287 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
288 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
Christoph Hellwig3b5ce8a2010-11-23 14:37:43 +0100289
290 hfsplus_sync_fs(sb, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 }
292
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800293 hfs_btree_close(sbi->attr_tree);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200294 hfs_btree_close(sbi->cat_tree);
295 hfs_btree_close(sbi->ext_tree);
296 iput(sbi->alloc_file);
297 iput(sbi->hidden_dir);
Seth Forshee65965282011-07-18 08:06:23 -0700298 kfree(sbi->s_vhdr_buf);
299 kfree(sbi->s_backup_vhdr_buf);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200300 unload_nls(sbi->nls);
Colin Leroy945b0922005-05-01 08:59:16 -0700301 kfree(sb->s_fs_info);
302 sb->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303}
304
David Howells726c3342006-06-23 02:02:58 -0700305static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306{
David Howells726c3342006-06-23 02:02:58 -0700307 struct super_block *sb = dentry->d_sb;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200308 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Coly Li25564dd2009-04-02 16:59:36 -0700309 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 buf->f_type = HFSPLUS_SUPER_MAGIC;
312 buf->f_bsize = sb->s_blocksize;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200313 buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
314 buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 buf->f_bavail = buf->f_bfree;
316 buf->f_files = 0xFFFFFFFF;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200317 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
Coly Li25564dd2009-04-02 16:59:36 -0700318 buf->f_fsid.val[0] = (u32)id;
319 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 buf->f_namelen = HFSPLUS_MAX_STRLEN;
321
322 return 0;
323}
324
325static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
326{
Theodore Ts'o02b99842014-03-13 10:14:33 -0400327 sync_filesystem(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
329 return 0;
330 if (!(*flags & MS_RDONLY)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200331 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr;
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100332 int force = 0;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800333
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100334 if (!hfsplus_parse_options_remount(data, &force))
Roman Zippelb0b623c2005-11-29 19:34:41 -0800335 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700338 pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 sb->s_flags |= MS_RDONLY;
340 *flags |= MS_RDONLY;
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100341 } else if (force) {
Roman Zippelb0b623c2005-11-29 19:34:41 -0800342 /* nothing */
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200343 } else if (vhdr->attributes &
344 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700345 pr_warn("filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 sb->s_flags |= MS_RDONLY;
347 *flags |= MS_RDONLY;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200348 } else if (vhdr->attributes &
349 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700350 pr_warn("filesystem is marked journaled, leaving read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800351 sb->s_flags |= MS_RDONLY;
352 *flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 }
354 }
355 return 0;
356}
357
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800358static const struct super_operations hfsplus_sops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 .alloc_inode = hfsplus_alloc_inode,
360 .destroy_inode = hfsplus_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 .write_inode = hfsplus_write_inode,
Al Virob57922d2010-06-07 14:34:48 -0400362 .evict_inode = hfsplus_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 .put_super = hfsplus_put_super,
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200364 .sync_fs = hfsplus_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 .statfs = hfsplus_statfs,
366 .remount_fs = hfsplus_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700367 .show_options = hfsplus_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368};
369
370static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
371{
372 struct hfsplus_vh *vhdr;
373 struct hfsplus_sb_info *sbi;
374 hfsplus_cat_entry entry;
375 struct hfs_find_data fd;
David Howells63525392008-02-07 00:15:40 -0800376 struct inode *root, *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 struct qstr str;
378 struct nls_table *nls = NULL;
Christoph Hellwigf1fcd9f2011-09-15 10:48:40 -0400379 u64 last_fs_block, last_fs_page;
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700380 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Namjae Jeon497d48b2012-07-30 14:42:11 -0700382 err = -ENOMEM;
Wyatt Banksa5001a22007-07-15 23:40:50 -0700383 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 if (!sbi)
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700385 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 sb->s_fs_info = sbi;
Christoph Hellwig40bf48a2010-10-01 05:41:39 +0200388 mutex_init(&sbi->alloc_mutex);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200389 mutex_init(&sbi->vh_mutex);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300390 spin_lock_init(&sbi->work_lock);
391 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700392 hfsplus_fill_defaults(sbi);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700393
394 err = -EINVAL;
Roman Zippel717dd80e2005-09-06 15:18:48 -0700395 if (!hfsplus_parse_options(data, sbi)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700396 pr_err("unable to parse mount options\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700397 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 }
399
400 /* temporarily use utf8 to correctly find the hidden dir below */
401 nls = sbi->nls;
402 sbi->nls = load_nls("utf8");
Joshua Kwanbd6a59b2006-01-06 00:09:45 -0800403 if (!sbi->nls) {
Joe Perchesd6142672013-04-30 15:27:55 -0700404 pr_err("unable to load nls for utf8\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700405 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 }
407
408 /* Grab the volume header */
409 if (hfsplus_read_wrapper(sb)) {
410 if (!silent)
Joe Perchesd6142672013-04-30 15:27:55 -0700411 pr_warn("unable to find HFS+ superblock\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700412 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200414 vhdr = sbi->s_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
416 /* Copy parts of the volume header into the superblock */
David Elliott2179d372006-01-18 17:43:08 -0800417 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
418 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
419 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
Joe Perchesd6142672013-04-30 15:27:55 -0700420 pr_err("wrong filesystem version\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700421 goto out_free_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200423 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
424 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200425 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
426 sbi->file_count = be32_to_cpu(vhdr->file_count);
427 sbi->folder_count = be32_to_cpu(vhdr->folder_count);
428 sbi->data_clump_blocks =
429 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
430 if (!sbi->data_clump_blocks)
431 sbi->data_clump_blocks = 1;
432 sbi->rsrc_clump_blocks =
433 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
434 if (!sbi->rsrc_clump_blocks)
435 sbi->rsrc_clump_blocks = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
Christoph Hellwigf1fcd9f2011-09-15 10:48:40 -0400437 err = -EFBIG;
438 last_fs_block = sbi->total_blocks - 1;
439 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >>
440 PAGE_CACHE_SHIFT;
441
442 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) ||
443 (last_fs_page > (pgoff_t)(~0ULL))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700444 pr_err("filesystem size too large\n");
Christoph Hellwigc6d5f5f2011-02-16 09:34:26 +0100445 goto out_free_vhdr;
446 }
447
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 /* Set up operations so we can load metadata */
449 sb->s_op = &hfsplus_sops;
450 sb->s_maxbytes = MAX_LFS_FILESIZE;
451
452 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700453 pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 sb->s_flags |= MS_RDONLY;
Christoph Hellwig84adede2010-10-01 05:45:20 +0200455 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
Roman Zippelb0b623c2005-11-29 19:34:41 -0800456 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700458 pr_warn("Filesystem is marked locked, mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 sb->s_flags |= MS_RDONLY;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200460 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) &&
461 !(sb->s_flags & MS_RDONLY)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700462 pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800463 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 }
465
Christoph Hellwigc6d5f5f2011-02-16 09:34:26 +0100466 err = -EINVAL;
467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 /* Load metadata objects (B*Trees) */
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200469 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
470 if (!sbi->ext_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700471 pr_err("failed to load extents file\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700472 goto out_free_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200474 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
475 if (!sbi->cat_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700476 pr_err("failed to load catalog file\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700477 goto out_close_ext_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 }
Vyacheslav Dubeyko95e0d7d2013-11-12 15:11:09 -0800479 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800480 if (vhdr->attr_file.total_blocks != 0) {
481 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
482 if (!sbi->attr_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700483 pr_err("failed to load attributes file\n");
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800484 goto out_close_cat_tree;
485 }
Vyacheslav Dubeyko95e0d7d2013-11-12 15:11:09 -0800486 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800487 }
488 sb->s_xattr = hfsplus_xattr_handlers;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
David Howells63525392008-02-07 00:15:40 -0800490 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
491 if (IS_ERR(inode)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700492 pr_err("failed to load allocation file\n");
David Howells63525392008-02-07 00:15:40 -0800493 err = PTR_ERR(inode);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800494 goto out_close_attr_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200496 sbi->alloc_file = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
498 /* Load the root directory */
David Howells63525392008-02-07 00:15:40 -0800499 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
500 if (IS_ERR(root)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700501 pr_err("failed to load root directory\n");
David Howells63525392008-02-07 00:15:40 -0800502 err = PTR_ERR(root);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700503 goto out_put_alloc_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 }
505
Al Viro68acb8e2012-02-12 22:07:07 -0500506 sb->s_d_op = &hfsplus_dentry_operations;
507 sb->s_root = d_make_root(root);
508 if (!sb->s_root) {
509 err = -ENOMEM;
510 goto out_put_alloc_file;
511 }
512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
514 str.name = HFSP_HIDDENDIR_NAME;
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +0400515 err = hfs_find_init(sbi->cat_tree, &fd);
516 if (err)
517 goto out_put_root;
Sougata Santra89ac9b42014-12-18 16:17:12 -0800518 err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
519 if (unlikely(err < 0))
520 goto out_put_root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
522 hfs_find_exit(&fd);
523 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700524 goto out_put_root;
David Howells63525392008-02-07 00:15:40 -0800525 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
526 if (IS_ERR(inode)) {
527 err = PTR_ERR(inode);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700528 goto out_put_root;
David Howells63525392008-02-07 00:15:40 -0800529 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200530 sbi->hidden_dir = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 } else
532 hfs_find_exit(&fd);
533
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700534 if (!(sb->s_flags & MS_RDONLY)) {
535 /*
536 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
537 * all three are registered with Apple for our use
538 */
539 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
540 vhdr->modify_date = hfsp_now2mt();
541 be32_add_cpu(&vhdr->write_count, 1);
542 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
543 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
544 hfsplus_sync_fs(sb, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700546 if (!sbi->hidden_dir) {
547 mutex_lock(&sbi->vh_mutex);
548 sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
Al Virob3f2a922012-01-10 17:48:52 -0500549 if (!sbi->hidden_dir) {
550 mutex_unlock(&sbi->vh_mutex);
551 err = -ENOMEM;
552 goto out_put_root;
553 }
554 err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root,
555 &str, sbi->hidden_dir);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800556 if (err) {
557 mutex_unlock(&sbi->vh_mutex);
Al Virob3f2a922012-01-10 17:48:52 -0500558 goto out_put_hidden_dir;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800559 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800561 err = hfsplus_init_inode_security(sbi->hidden_dir,
562 root, &str);
563 if (err == -EOPNOTSUPP)
564 err = 0; /* Operation is not supported. */
565 else if (err) {
566 /*
567 * Try to delete anyway without
568 * error analysis.
569 */
570 hfsplus_delete_cat(sbi->hidden_dir->i_ino,
571 root, &str);
572 mutex_unlock(&sbi->vh_mutex);
573 goto out_put_hidden_dir;
574 }
575
576 mutex_unlock(&sbi->vh_mutex);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700577 hfsplus_mark_inode_dirty(sbi->hidden_dir,
578 HFSPLUS_I_CAT_DIRTY);
579 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 }
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 unload_nls(sbi->nls);
583 sbi->nls = nls;
584 return 0;
585
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700586out_put_hidden_dir:
587 iput(sbi->hidden_dir);
588out_put_root:
Al Viro68acb8e2012-02-12 22:07:07 -0500589 dput(sb->s_root);
590 sb->s_root = NULL;
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700591out_put_alloc_file:
592 iput(sbi->alloc_file);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800593out_close_attr_tree:
594 hfs_btree_close(sbi->attr_tree);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700595out_close_cat_tree:
596 hfs_btree_close(sbi->cat_tree);
597out_close_ext_tree:
598 hfs_btree_close(sbi->ext_tree);
599out_free_vhdr:
Seth Forsheef588c962011-09-15 10:48:27 -0400600 kfree(sbi->s_vhdr_buf);
601 kfree(sbi->s_backup_vhdr_buf);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700602out_unload_nls:
603 unload_nls(sbi->nls);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000604 unload_nls(nls);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700605 kfree(sbi);
606out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 return err;
608}
609
610MODULE_AUTHOR("Brad Boyer");
611MODULE_DESCRIPTION("Extended Macintosh Filesystem");
612MODULE_LICENSE("GPL");
613
Christoph Lametere18b8902006-12-06 20:33:20 -0800614static struct kmem_cache *hfsplus_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616static struct inode *hfsplus_alloc_inode(struct super_block *sb)
617{
618 struct hfsplus_inode_info *i;
619
Christoph Lametere94b1762006-12-06 20:33:17 -0800620 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 return i ? &i->vfs_inode : NULL;
622}
623
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100624static void hfsplus_i_callback(struct rcu_head *head)
625{
626 struct inode *inode = container_of(head, struct inode, i_rcu);
627
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100628 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
629}
630
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631static void hfsplus_destroy_inode(struct inode *inode)
632{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100633 call_rcu(&inode->i_rcu, hfsplus_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634}
635
636#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
637
Al Viro152a0832010-07-25 00:46:55 +0400638static struct dentry *hfsplus_mount(struct file_system_type *fs_type,
639 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640{
Al Viro152a0832010-07-25 00:46:55 +0400641 return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642}
643
644static struct file_system_type hfsplus_fs_type = {
645 .owner = THIS_MODULE,
646 .name = "hfsplus",
Al Viro152a0832010-07-25 00:46:55 +0400647 .mount = hfsplus_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 .kill_sb = kill_block_super,
649 .fs_flags = FS_REQUIRES_DEV,
650};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800651MODULE_ALIAS_FS("hfsplus");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700653static void hfsplus_init_once(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654{
655 struct hfsplus_inode_info *i = p;
656
Christoph Lametera35afb82007-05-16 22:10:57 -0700657 inode_init_once(&i->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658}
659
660static int __init init_hfsplus_fs(void)
661{
662 int err;
663
664 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
665 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900666 hfsplus_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 if (!hfsplus_inode_cachep)
668 return -ENOMEM;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800669 err = hfsplus_create_attr_tree_cache();
670 if (err)
671 goto destroy_inode_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 err = register_filesystem(&hfsplus_fs_type);
673 if (err)
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800674 goto destroy_attr_tree_cache;
675 return 0;
676
677destroy_attr_tree_cache:
678 hfsplus_destroy_attr_tree_cache();
679
680destroy_inode_cache:
681 kmem_cache_destroy(hfsplus_inode_cachep);
682
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 return err;
684}
685
686static void __exit exit_hfsplus_fs(void)
687{
688 unregister_filesystem(&hfsplus_fs_type);
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000689
690 /*
691 * Make sure all delayed rcu free inodes are flushed before we
692 * destroy cache.
693 */
694 rcu_barrier();
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800695 hfsplus_destroy_attr_tree_cache();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700696 kmem_cache_destroy(hfsplus_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697}
698
699module_init(init_hfsplus_fs)
700module_exit(exit_hfsplus_fs)