blob: c35911362ff9edaa839976cad64f1b9912430404 [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>
Tejun Heo66114ca2015-05-22 17:13:32 -040014#include <linux/backing-dev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/vfs.h>
18#include <linux/nls.h>
19
20static struct inode *hfsplus_alloc_inode(struct super_block *sb);
21static void hfsplus_destroy_inode(struct inode *inode);
22
23#include "hfsplus_fs.h"
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -080024#include "xattr.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020026static int hfsplus_system_read_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070027{
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020028 struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
David Howells63525392008-02-07 00:15:40 -080029
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020030 switch (inode->i_ino) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 case HFSPLUS_EXT_CNID:
32 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
33 inode->i_mapping->a_ops = &hfsplus_btree_aops;
34 break;
35 case HFSPLUS_CAT_CNID:
36 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
37 inode->i_mapping->a_ops = &hfsplus_btree_aops;
38 break;
39 case HFSPLUS_ALLOC_CNID:
40 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
41 inode->i_mapping->a_ops = &hfsplus_aops;
42 break;
43 case HFSPLUS_START_CNID:
44 hfsplus_inode_read_fork(inode, &vhdr->start_file);
45 break;
46 case HFSPLUS_ATTR_CNID:
47 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
48 inode->i_mapping->a_ops = &hfsplus_btree_aops;
49 break;
50 default:
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020051 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 }
53
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020054 return 0;
55}
56
57struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
58{
59 struct hfs_find_data fd;
60 struct inode *inode;
61 int err;
62
63 inode = iget_locked(sb, ino);
64 if (!inode)
65 return ERR_PTR(-ENOMEM);
66 if (!(inode->i_state & I_NEW))
67 return inode;
68
69 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
70 mutex_init(&HFSPLUS_I(inode)->extents_lock);
71 HFSPLUS_I(inode)->flags = 0;
Christoph Hellwigb33b7922010-11-23 14:38:13 +010072 HFSPLUS_I(inode)->extent_state = 0;
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020073 HFSPLUS_I(inode)->rsrc_inode = NULL;
74 atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
75
76 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
77 inode->i_ino == HFSPLUS_ROOT_CNID) {
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +040078 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
79 if (!err) {
80 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
81 if (!err)
82 err = hfsplus_cat_read_inode(inode, &fd);
83 hfs_find_exit(&fd);
84 }
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020085 } else {
86 err = hfsplus_system_read_inode(inode);
87 }
88
89 if (err) {
90 iget_failed(inode);
91 return ERR_PTR(err);
92 }
93
David Howells63525392008-02-07 00:15:40 -080094 unlock_new_inode(inode);
95 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
Christoph Hellwigb5080f72010-10-01 05:43:43 +020098static int hfsplus_system_write_inode(struct inode *inode)
99{
100 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
101 struct hfsplus_vh *vhdr = sbi->s_vhdr;
102 struct hfsplus_fork_raw *fork;
103 struct hfs_btree *tree = NULL;
104
105 switch (inode->i_ino) {
106 case HFSPLUS_EXT_CNID:
107 fork = &vhdr->ext_file;
108 tree = sbi->ext_tree;
109 break;
110 case HFSPLUS_CAT_CNID:
111 fork = &vhdr->cat_file;
112 tree = sbi->cat_tree;
113 break;
114 case HFSPLUS_ALLOC_CNID:
115 fork = &vhdr->alloc_file;
116 break;
117 case HFSPLUS_START_CNID:
118 fork = &vhdr->start_file;
119 break;
120 case HFSPLUS_ATTR_CNID:
121 fork = &vhdr->attr_file;
122 tree = sbi->attr_tree;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800123 break;
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200124 default:
125 return -EIO;
126 }
127
128 if (fork->total_size != cpu_to_be64(inode->i_size)) {
Christoph Hellwig84adede2010-10-01 05:45:20 +0200129 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300130 hfsplus_mark_mdb_dirty(inode->i_sb);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200131 }
132 hfsplus_inode_write_fork(inode, fork);
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800133 if (tree) {
134 int err = hfs_btree_write(tree);
Fabian Frederickb73f3d02014-06-06 14:36:31 -0700135
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800136 if (err) {
Joe Perchesd6142672013-04-30 15:27:55 -0700137 pr_err("b-tree write err: %d, ino %lu\n",
Fabian Frederickb73f3d02014-06-06 14:36:31 -0700138 err, inode->i_ino);
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800139 return err;
140 }
141 }
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200142 return 0;
143}
144
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100145static int hfsplus_write_inode(struct inode *inode,
146 struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147{
Alexey Khoroshilovdd7f3d52011-07-06 02:30:00 +0400148 int err;
149
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700150 hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200151
Alexey Khoroshilovdd7f3d52011-07-06 02:30:00 +0400152 err = hfsplus_ext_write_extent(inode);
153 if (err)
154 return err;
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200155
156 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
157 inode->i_ino == HFSPLUS_ROOT_CNID)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 return hfsplus_cat_write_inode(inode);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200159 else
160 return hfsplus_system_write_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161}
162
Al Virob57922d2010-06-07 14:34:48 -0400163static void hfsplus_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700165 hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700166 truncate_inode_pages_final(&inode->i_data);
Jan Karadbd57682012-05-03 14:48:02 +0200167 clear_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 if (HFSPLUS_IS_RSRC(inode)) {
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200169 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
170 iput(HFSPLUS_I(inode)->rsrc_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172}
173
Artem Bityutskiy0a818612012-07-12 17:26:28 +0300174static int hfsplus_sync_fs(struct super_block *sb, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200176 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
177 struct hfsplus_vh *vhdr = sbi->s_vhdr;
Christoph Hellwig52399b12010-11-23 14:37:47 +0100178 int write_backup = 0;
179 int error, error2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Christoph Hellwigf02e26f2010-11-23 14:38:02 +0100181 if (!wait)
182 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700184 hfs_dbg(SUPER, "hfsplus_sync_fs\n");
Christoph Hellwigebc1ac12009-05-11 23:35:03 +0200185
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100186 /*
187 * Explicitly write out the special metadata inodes.
188 *
189 * While these special inodes are marked as hashed and written
190 * out peridocically by the flusher threads we redirty them
191 * during writeout of normal inodes, and thus the life lock
192 * prevents us from getting the latest state to disk.
193 */
194 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
195 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
196 if (!error)
197 error = error2;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800198 if (sbi->attr_tree) {
199 error2 =
200 filemap_write_and_wait(sbi->attr_tree->inode->i_mapping);
201 if (!error)
202 error = error2;
203 }
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100204 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
205 if (!error)
206 error = error2;
207
Christoph Hellwig52399b12010-11-23 14:37:47 +0100208 mutex_lock(&sbi->vh_mutex);
209 mutex_lock(&sbi->alloc_mutex);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200210 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200211 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
212 vhdr->folder_count = cpu_to_be32(sbi->folder_count);
213 vhdr->file_count = cpu_to_be32(sbi->file_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Christoph Hellwig84adede2010-10-01 05:45:20 +0200215 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
Christoph Hellwig52399b12010-11-23 14:37:47 +0100216 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
217 write_backup = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 }
Christoph Hellwig52399b12010-11-23 14:37:47 +0100219
Seth Forshee65965282011-07-18 08:06:23 -0700220 error2 = hfsplus_submit_bio(sb,
Christoph Hellwig52399b12010-11-23 14:37:47 +0100221 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
Seth Forshee65965282011-07-18 08:06:23 -0700222 sbi->s_vhdr_buf, NULL, WRITE_SYNC);
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100223 if (!error)
224 error = error2;
Christoph Hellwig52399b12010-11-23 14:37:47 +0100225 if (!write_backup)
226 goto out;
227
Seth Forshee65965282011-07-18 08:06:23 -0700228 error2 = hfsplus_submit_bio(sb,
Christoph Hellwig52399b12010-11-23 14:37:47 +0100229 sbi->part_start + sbi->sect_count - 2,
Seth Forshee65965282011-07-18 08:06:23 -0700230 sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC);
Christoph Hellwig52399b12010-11-23 14:37:47 +0100231 if (!error)
232 error2 = error;
233out:
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200234 mutex_unlock(&sbi->alloc_mutex);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200235 mutex_unlock(&sbi->vh_mutex);
Christoph Hellwig34a2d312010-11-23 14:38:21 +0100236
237 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
238 blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
239
Christoph Hellwig52399b12010-11-23 14:37:47 +0100240 return error;
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200241}
242
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300243static void delayed_sync_fs(struct work_struct *work)
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200244{
Vyacheslav Dubeykobffdd662012-12-20 15:05:29 -0800245 int err;
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300246 struct hfsplus_sb_info *sbi;
247
248 sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
249
250 spin_lock(&sbi->work_lock);
251 sbi->work_queued = 0;
252 spin_unlock(&sbi->work_lock);
253
Vyacheslav Dubeykobffdd662012-12-20 15:05:29 -0800254 err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
255 if (err)
Joe Perchesd6142672013-04-30 15:27:55 -0700256 pr_err("delayed sync fs err %d\n", err);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300257}
258
259void hfsplus_mark_mdb_dirty(struct super_block *sb)
260{
261 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
262 unsigned long delay;
263
264 if (sb->s_flags & MS_RDONLY)
265 return;
266
267 spin_lock(&sbi->work_lock);
268 if (!sbi->work_queued) {
269 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
270 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
271 sbi->work_queued = 1;
272 }
273 spin_unlock(&sbi->work_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274}
275
276static void hfsplus_put_super(struct super_block *sb)
277{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200278 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
279
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700280 hfs_dbg(SUPER, "hfsplus_put_super\n");
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200281
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300282 cancel_delayed_work_sync(&sbi->sync_work);
283
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200284 if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) {
285 struct hfsplus_vh *vhdr = sbi->s_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
287 vhdr->modify_date = hfsp_now2mt();
288 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
289 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
Christoph Hellwig3b5ce8a2010-11-23 14:37:43 +0100290
291 hfsplus_sync_fs(sb, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 }
293
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800294 hfs_btree_close(sbi->attr_tree);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200295 hfs_btree_close(sbi->cat_tree);
296 hfs_btree_close(sbi->ext_tree);
297 iput(sbi->alloc_file);
298 iput(sbi->hidden_dir);
Seth Forshee65965282011-07-18 08:06:23 -0700299 kfree(sbi->s_vhdr_buf);
300 kfree(sbi->s_backup_vhdr_buf);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200301 unload_nls(sbi->nls);
Colin Leroy945b0922005-05-01 08:59:16 -0700302 kfree(sb->s_fs_info);
303 sb->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304}
305
David Howells726c3342006-06-23 02:02:58 -0700306static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307{
David Howells726c3342006-06-23 02:02:58 -0700308 struct super_block *sb = dentry->d_sb;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200309 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Coly Li25564dd2009-04-02 16:59:36 -0700310 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 buf->f_type = HFSPLUS_SUPER_MAGIC;
313 buf->f_bsize = sb->s_blocksize;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200314 buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
315 buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 buf->f_bavail = buf->f_bfree;
317 buf->f_files = 0xFFFFFFFF;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200318 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
Coly Li25564dd2009-04-02 16:59:36 -0700319 buf->f_fsid.val[0] = (u32)id;
320 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 buf->f_namelen = HFSPLUS_MAX_STRLEN;
322
323 return 0;
324}
325
326static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
327{
Theodore Ts'o02b99842014-03-13 10:14:33 -0400328 sync_filesystem(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
330 return 0;
331 if (!(*flags & MS_RDONLY)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200332 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr;
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100333 int force = 0;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800334
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100335 if (!hfsplus_parse_options_remount(data, &force))
Roman Zippelb0b623c2005-11-29 19:34:41 -0800336 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700339 pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 sb->s_flags |= MS_RDONLY;
341 *flags |= MS_RDONLY;
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100342 } else if (force) {
Roman Zippelb0b623c2005-11-29 19:34:41 -0800343 /* nothing */
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200344 } else if (vhdr->attributes &
345 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700346 pr_warn("filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 sb->s_flags |= MS_RDONLY;
348 *flags |= MS_RDONLY;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200349 } else if (vhdr->attributes &
350 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700351 pr_warn("filesystem is marked journaled, leaving read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800352 sb->s_flags |= MS_RDONLY;
353 *flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 }
355 }
356 return 0;
357}
358
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800359static const struct super_operations hfsplus_sops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 .alloc_inode = hfsplus_alloc_inode,
361 .destroy_inode = hfsplus_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 .write_inode = hfsplus_write_inode,
Al Virob57922d2010-06-07 14:34:48 -0400363 .evict_inode = hfsplus_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 .put_super = hfsplus_put_super,
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200365 .sync_fs = hfsplus_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 .statfs = hfsplus_statfs,
367 .remount_fs = hfsplus_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700368 .show_options = hfsplus_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369};
370
371static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
372{
373 struct hfsplus_vh *vhdr;
374 struct hfsplus_sb_info *sbi;
375 hfsplus_cat_entry entry;
376 struct hfs_find_data fd;
David Howells63525392008-02-07 00:15:40 -0800377 struct inode *root, *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 struct qstr str;
379 struct nls_table *nls = NULL;
Christoph Hellwigf1fcd9f2011-09-15 10:48:40 -0400380 u64 last_fs_block, last_fs_page;
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700381 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Namjae Jeon497d48b2012-07-30 14:42:11 -0700383 err = -ENOMEM;
Wyatt Banksa5001a22007-07-15 23:40:50 -0700384 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 if (!sbi)
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700386 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 sb->s_fs_info = sbi;
Christoph Hellwig40bf48a2010-10-01 05:41:39 +0200389 mutex_init(&sbi->alloc_mutex);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200390 mutex_init(&sbi->vh_mutex);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300391 spin_lock_init(&sbi->work_lock);
392 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700393 hfsplus_fill_defaults(sbi);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700394
395 err = -EINVAL;
Roman Zippel717dd80e2005-09-06 15:18:48 -0700396 if (!hfsplus_parse_options(data, sbi)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700397 pr_err("unable to parse mount options\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700398 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 }
400
401 /* temporarily use utf8 to correctly find the hidden dir below */
402 nls = sbi->nls;
403 sbi->nls = load_nls("utf8");
Joshua Kwanbd6a59b2006-01-06 00:09:45 -0800404 if (!sbi->nls) {
Joe Perchesd6142672013-04-30 15:27:55 -0700405 pr_err("unable to load nls for utf8\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700406 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 }
408
409 /* Grab the volume header */
410 if (hfsplus_read_wrapper(sb)) {
411 if (!silent)
Joe Perchesd6142672013-04-30 15:27:55 -0700412 pr_warn("unable to find HFS+ superblock\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700413 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200415 vhdr = sbi->s_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
417 /* Copy parts of the volume header into the superblock */
David Elliott2179d372006-01-18 17:43:08 -0800418 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
419 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
420 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
Joe Perchesd6142672013-04-30 15:27:55 -0700421 pr_err("wrong filesystem version\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700422 goto out_free_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200424 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
425 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200426 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
427 sbi->file_count = be32_to_cpu(vhdr->file_count);
428 sbi->folder_count = be32_to_cpu(vhdr->folder_count);
429 sbi->data_clump_blocks =
430 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
431 if (!sbi->data_clump_blocks)
432 sbi->data_clump_blocks = 1;
433 sbi->rsrc_clump_blocks =
434 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
435 if (!sbi->rsrc_clump_blocks)
436 sbi->rsrc_clump_blocks = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Christoph Hellwigf1fcd9f2011-09-15 10:48:40 -0400438 err = -EFBIG;
439 last_fs_block = sbi->total_blocks - 1;
440 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >>
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300441 PAGE_SHIFT;
Christoph Hellwigf1fcd9f2011-09-15 10:48:40 -0400442
443 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) ||
444 (last_fs_page > (pgoff_t)(~0ULL))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700445 pr_err("filesystem size too large\n");
Christoph Hellwigc6d5f5f2011-02-16 09:34:26 +0100446 goto out_free_vhdr;
447 }
448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 /* Set up operations so we can load metadata */
450 sb->s_op = &hfsplus_sops;
451 sb->s_maxbytes = MAX_LFS_FILESIZE;
452
453 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700454 pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 sb->s_flags |= MS_RDONLY;
Christoph Hellwig84adede2010-10-01 05:45:20 +0200456 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
Roman Zippelb0b623c2005-11-29 19:34:41 -0800457 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700459 pr_warn("Filesystem is marked locked, mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 sb->s_flags |= MS_RDONLY;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200461 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) &&
462 !(sb->s_flags & MS_RDONLY)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700463 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 -0800464 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 }
466
Christoph Hellwigc6d5f5f2011-02-16 09:34:26 +0100467 err = -EINVAL;
468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 /* Load metadata objects (B*Trees) */
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200470 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
471 if (!sbi->ext_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700472 pr_err("failed to load extents file\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700473 goto out_free_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200475 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
476 if (!sbi->cat_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700477 pr_err("failed to load catalog file\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700478 goto out_close_ext_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 }
Vyacheslav Dubeyko95e0d7d2013-11-12 15:11:09 -0800480 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800481 if (vhdr->attr_file.total_blocks != 0) {
482 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
483 if (!sbi->attr_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700484 pr_err("failed to load attributes file\n");
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800485 goto out_close_cat_tree;
486 }
Vyacheslav Dubeyko95e0d7d2013-11-12 15:11:09 -0800487 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800488 }
489 sb->s_xattr = hfsplus_xattr_handlers;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
David Howells63525392008-02-07 00:15:40 -0800491 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
492 if (IS_ERR(inode)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700493 pr_err("failed to load allocation file\n");
David Howells63525392008-02-07 00:15:40 -0800494 err = PTR_ERR(inode);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800495 goto out_close_attr_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200497 sbi->alloc_file = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499 /* Load the root directory */
David Howells63525392008-02-07 00:15:40 -0800500 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
501 if (IS_ERR(root)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700502 pr_err("failed to load root directory\n");
David Howells63525392008-02-07 00:15:40 -0800503 err = PTR_ERR(root);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700504 goto out_put_alloc_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 }
506
Al Viro68acb8e2012-02-12 22:07:07 -0500507 sb->s_d_op = &hfsplus_dentry_operations;
508 sb->s_root = d_make_root(root);
509 if (!sb->s_root) {
510 err = -ENOMEM;
511 goto out_put_alloc_file;
512 }
513
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
515 str.name = HFSP_HIDDENDIR_NAME;
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +0400516 err = hfs_find_init(sbi->cat_tree, &fd);
517 if (err)
518 goto out_put_root;
Sougata Santra89ac9b42014-12-18 16:17:12 -0800519 err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
520 if (unlikely(err < 0))
521 goto out_put_root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
523 hfs_find_exit(&fd);
524 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700525 goto out_put_root;
David Howells63525392008-02-07 00:15:40 -0800526 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
527 if (IS_ERR(inode)) {
528 err = PTR_ERR(inode);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700529 goto out_put_root;
David Howells63525392008-02-07 00:15:40 -0800530 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200531 sbi->hidden_dir = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 } else
533 hfs_find_exit(&fd);
534
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700535 if (!(sb->s_flags & MS_RDONLY)) {
536 /*
537 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
538 * all three are registered with Apple for our use
539 */
540 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
541 vhdr->modify_date = hfsp_now2mt();
542 be32_add_cpu(&vhdr->write_count, 1);
543 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
544 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
545 hfsplus_sync_fs(sb, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700547 if (!sbi->hidden_dir) {
548 mutex_lock(&sbi->vh_mutex);
549 sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
Al Virob3f2a922012-01-10 17:48:52 -0500550 if (!sbi->hidden_dir) {
551 mutex_unlock(&sbi->vh_mutex);
552 err = -ENOMEM;
553 goto out_put_root;
554 }
555 err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root,
556 &str, sbi->hidden_dir);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800557 if (err) {
558 mutex_unlock(&sbi->vh_mutex);
Al Virob3f2a922012-01-10 17:48:52 -0500559 goto out_put_hidden_dir;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800560 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800562 err = hfsplus_init_inode_security(sbi->hidden_dir,
563 root, &str);
564 if (err == -EOPNOTSUPP)
565 err = 0; /* Operation is not supported. */
566 else if (err) {
567 /*
568 * Try to delete anyway without
569 * error analysis.
570 */
571 hfsplus_delete_cat(sbi->hidden_dir->i_ino,
572 root, &str);
573 mutex_unlock(&sbi->vh_mutex);
574 goto out_put_hidden_dir;
575 }
576
577 mutex_unlock(&sbi->vh_mutex);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700578 hfsplus_mark_inode_dirty(sbi->hidden_dir,
579 HFSPLUS_I_CAT_DIRTY);
580 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 }
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 unload_nls(sbi->nls);
584 sbi->nls = nls;
585 return 0;
586
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700587out_put_hidden_dir:
588 iput(sbi->hidden_dir);
589out_put_root:
Al Viro68acb8e2012-02-12 22:07:07 -0500590 dput(sb->s_root);
591 sb->s_root = NULL;
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700592out_put_alloc_file:
593 iput(sbi->alloc_file);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800594out_close_attr_tree:
595 hfs_btree_close(sbi->attr_tree);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700596out_close_cat_tree:
597 hfs_btree_close(sbi->cat_tree);
598out_close_ext_tree:
599 hfs_btree_close(sbi->ext_tree);
600out_free_vhdr:
Seth Forsheef588c962011-09-15 10:48:27 -0400601 kfree(sbi->s_vhdr_buf);
602 kfree(sbi->s_backup_vhdr_buf);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700603out_unload_nls:
604 unload_nls(sbi->nls);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000605 unload_nls(nls);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700606 kfree(sbi);
607out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 return err;
609}
610
611MODULE_AUTHOR("Brad Boyer");
612MODULE_DESCRIPTION("Extended Macintosh Filesystem");
613MODULE_LICENSE("GPL");
614
Christoph Lametere18b8902006-12-06 20:33:20 -0800615static struct kmem_cache *hfsplus_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
617static struct inode *hfsplus_alloc_inode(struct super_block *sb)
618{
619 struct hfsplus_inode_info *i;
620
Christoph Lametere94b1762006-12-06 20:33:17 -0800621 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 return i ? &i->vfs_inode : NULL;
623}
624
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100625static void hfsplus_i_callback(struct rcu_head *head)
626{
627 struct inode *inode = container_of(head, struct inode, i_rcu);
628
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100629 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
630}
631
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632static void hfsplus_destroy_inode(struct inode *inode)
633{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100634 call_rcu(&inode->i_rcu, hfsplus_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635}
636
637#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
638
Al Viro152a0832010-07-25 00:46:55 +0400639static struct dentry *hfsplus_mount(struct file_system_type *fs_type,
640 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641{
Al Viro152a0832010-07-25 00:46:55 +0400642 return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643}
644
645static struct file_system_type hfsplus_fs_type = {
646 .owner = THIS_MODULE,
647 .name = "hfsplus",
Al Viro152a0832010-07-25 00:46:55 +0400648 .mount = hfsplus_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 .kill_sb = kill_block_super,
650 .fs_flags = FS_REQUIRES_DEV,
651};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800652MODULE_ALIAS_FS("hfsplus");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700654static void hfsplus_init_once(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655{
656 struct hfsplus_inode_info *i = p;
657
Christoph Lametera35afb82007-05-16 22:10:57 -0700658 inode_init_once(&i->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659}
660
661static int __init init_hfsplus_fs(void)
662{
663 int err;
664
665 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
Vladimir Davydov5d097052016-01-14 15:18:21 -0800666 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
Paul Mundt20c2df82007-07-20 10:11:58 +0900667 hfsplus_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 if (!hfsplus_inode_cachep)
669 return -ENOMEM;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800670 err = hfsplus_create_attr_tree_cache();
671 if (err)
672 goto destroy_inode_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 err = register_filesystem(&hfsplus_fs_type);
674 if (err)
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800675 goto destroy_attr_tree_cache;
676 return 0;
677
678destroy_attr_tree_cache:
679 hfsplus_destroy_attr_tree_cache();
680
681destroy_inode_cache:
682 kmem_cache_destroy(hfsplus_inode_cachep);
683
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 return err;
685}
686
687static void __exit exit_hfsplus_fs(void)
688{
689 unregister_filesystem(&hfsplus_fs_type);
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000690
691 /*
692 * Make sure all delayed rcu free inodes are flushed before we
693 * destroy cache.
694 */
695 rcu_barrier();
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800696 hfsplus_destroy_attr_tree_cache();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700697 kmem_cache_destroy(hfsplus_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698}
699
700module_init(init_hfsplus_fs)
701module_exit(exit_hfsplus_fs)