blob: 11854dd84572639e86fc70290be9ff2ee4bd725a [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);
Al Viro323ee8f2016-05-12 20:02:09 -040070 spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock);
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020071 mutex_init(&HFSPLUS_I(inode)->extents_lock);
72 HFSPLUS_I(inode)->flags = 0;
Christoph Hellwigb33b7922010-11-23 14:38:13 +010073 HFSPLUS_I(inode)->extent_state = 0;
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020074 HFSPLUS_I(inode)->rsrc_inode = NULL;
75 atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
76
77 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
78 inode->i_ino == HFSPLUS_ROOT_CNID) {
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +040079 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
80 if (!err) {
81 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
82 if (!err)
83 err = hfsplus_cat_read_inode(inode, &fd);
84 hfs_find_exit(&fd);
85 }
Christoph Hellwigfc4fff82010-10-01 05:43:41 +020086 } else {
87 err = hfsplus_system_read_inode(inode);
88 }
89
90 if (err) {
91 iget_failed(inode);
92 return ERR_PTR(err);
93 }
94
David Howells63525392008-02-07 00:15:40 -080095 unlock_new_inode(inode);
96 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097}
98
Christoph Hellwigb5080f72010-10-01 05:43:43 +020099static int hfsplus_system_write_inode(struct inode *inode)
100{
101 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
102 struct hfsplus_vh *vhdr = sbi->s_vhdr;
103 struct hfsplus_fork_raw *fork;
104 struct hfs_btree *tree = NULL;
105
106 switch (inode->i_ino) {
107 case HFSPLUS_EXT_CNID:
108 fork = &vhdr->ext_file;
109 tree = sbi->ext_tree;
110 break;
111 case HFSPLUS_CAT_CNID:
112 fork = &vhdr->cat_file;
113 tree = sbi->cat_tree;
114 break;
115 case HFSPLUS_ALLOC_CNID:
116 fork = &vhdr->alloc_file;
117 break;
118 case HFSPLUS_START_CNID:
119 fork = &vhdr->start_file;
120 break;
121 case HFSPLUS_ATTR_CNID:
122 fork = &vhdr->attr_file;
123 tree = sbi->attr_tree;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800124 break;
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200125 default:
126 return -EIO;
127 }
128
129 if (fork->total_size != cpu_to_be64(inode->i_size)) {
Christoph Hellwig84adede2010-10-01 05:45:20 +0200130 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300131 hfsplus_mark_mdb_dirty(inode->i_sb);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200132 }
133 hfsplus_inode_write_fork(inode, fork);
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800134 if (tree) {
135 int err = hfs_btree_write(tree);
Fabian Frederickb73f3d02014-06-06 14:36:31 -0700136
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800137 if (err) {
Joe Perchesd6142672013-04-30 15:27:55 -0700138 pr_err("b-tree write err: %d, ino %lu\n",
Fabian Frederickb73f3d02014-06-06 14:36:31 -0700139 err, inode->i_ino);
Vyacheslav Dubeyko81cc7fa2012-12-20 15:05:28 -0800140 return err;
141 }
142 }
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200143 return 0;
144}
145
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100146static int hfsplus_write_inode(struct inode *inode,
147 struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
Alexey Khoroshilovdd7f3d52011-07-06 02:30:00 +0400149 int err;
150
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700151 hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200152
Alexey Khoroshilovdd7f3d52011-07-06 02:30:00 +0400153 err = hfsplus_ext_write_extent(inode);
154 if (err)
155 return err;
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200156
157 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
158 inode->i_ino == HFSPLUS_ROOT_CNID)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 return hfsplus_cat_write_inode(inode);
Christoph Hellwigb5080f72010-10-01 05:43:43 +0200160 else
161 return hfsplus_system_write_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162}
163
Al Virob57922d2010-06-07 14:34:48 -0400164static void hfsplus_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700166 hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700167 truncate_inode_pages_final(&inode->i_data);
Jan Karadbd57682012-05-03 14:48:02 +0200168 clear_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 if (HFSPLUS_IS_RSRC(inode)) {
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200170 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
171 iput(HFSPLUS_I(inode)->rsrc_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173}
174
Artem Bityutskiy0a818612012-07-12 17:26:28 +0300175static int hfsplus_sync_fs(struct super_block *sb, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200177 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
178 struct hfsplus_vh *vhdr = sbi->s_vhdr;
Christoph Hellwig52399b12010-11-23 14:37:47 +0100179 int write_backup = 0;
180 int error, error2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Christoph Hellwigf02e26f2010-11-23 14:38:02 +0100182 if (!wait)
183 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700185 hfs_dbg(SUPER, "hfsplus_sync_fs\n");
Christoph Hellwigebc1ac12009-05-11 23:35:03 +0200186
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100187 /*
188 * Explicitly write out the special metadata inodes.
189 *
190 * While these special inodes are marked as hashed and written
191 * out peridocically by the flusher threads we redirty them
192 * during writeout of normal inodes, and thus the life lock
193 * prevents us from getting the latest state to disk.
194 */
195 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
196 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
197 if (!error)
198 error = error2;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800199 if (sbi->attr_tree) {
200 error2 =
201 filemap_write_and_wait(sbi->attr_tree->inode->i_mapping);
202 if (!error)
203 error = error2;
204 }
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100205 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
206 if (!error)
207 error = error2;
208
Christoph Hellwig52399b12010-11-23 14:37:47 +0100209 mutex_lock(&sbi->vh_mutex);
210 mutex_lock(&sbi->alloc_mutex);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200211 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200212 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
213 vhdr->folder_count = cpu_to_be32(sbi->folder_count);
214 vhdr->file_count = cpu_to_be32(sbi->file_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Christoph Hellwig84adede2010-10-01 05:45:20 +0200216 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
Christoph Hellwig52399b12010-11-23 14:37:47 +0100217 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
218 write_backup = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 }
Christoph Hellwig52399b12010-11-23 14:37:47 +0100220
Seth Forshee65965282011-07-18 08:06:23 -0700221 error2 = hfsplus_submit_bio(sb,
Christoph Hellwig52399b12010-11-23 14:37:47 +0100222 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
Mike Christie67ed2592016-06-05 14:31:58 -0500223 sbi->s_vhdr_buf, NULL, REQ_OP_WRITE,
224 WRITE_SYNC);
Christoph Hellwig7dc4f002010-11-23 14:37:57 +0100225 if (!error)
226 error = error2;
Christoph Hellwig52399b12010-11-23 14:37:47 +0100227 if (!write_backup)
228 goto out;
229
Seth Forshee65965282011-07-18 08:06:23 -0700230 error2 = hfsplus_submit_bio(sb,
Christoph Hellwig52399b12010-11-23 14:37:47 +0100231 sbi->part_start + sbi->sect_count - 2,
Mike Christie67ed2592016-06-05 14:31:58 -0500232 sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE,
233 WRITE_SYNC);
Christoph Hellwig52399b12010-11-23 14:37:47 +0100234 if (!error)
235 error2 = error;
236out:
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200237 mutex_unlock(&sbi->alloc_mutex);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200238 mutex_unlock(&sbi->vh_mutex);
Christoph Hellwig34a2d312010-11-23 14:38:21 +0100239
240 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
241 blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
242
Christoph Hellwig52399b12010-11-23 14:37:47 +0100243 return error;
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200244}
245
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300246static void delayed_sync_fs(struct work_struct *work)
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200247{
Vyacheslav Dubeykobffdd662012-12-20 15:05:29 -0800248 int err;
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300249 struct hfsplus_sb_info *sbi;
250
251 sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
252
253 spin_lock(&sbi->work_lock);
254 sbi->work_queued = 0;
255 spin_unlock(&sbi->work_lock);
256
Vyacheslav Dubeykobffdd662012-12-20 15:05:29 -0800257 err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
258 if (err)
Joe Perchesd6142672013-04-30 15:27:55 -0700259 pr_err("delayed sync fs err %d\n", err);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300260}
261
262void hfsplus_mark_mdb_dirty(struct super_block *sb)
263{
264 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
265 unsigned long delay;
266
267 if (sb->s_flags & MS_RDONLY)
268 return;
269
270 spin_lock(&sbi->work_lock);
271 if (!sbi->work_queued) {
272 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
273 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
274 sbi->work_queued = 1;
275 }
276 spin_unlock(&sbi->work_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277}
278
279static void hfsplus_put_super(struct super_block *sb)
280{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200281 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
282
Joe Perchesc2b3e1f2013-04-30 15:27:54 -0700283 hfs_dbg(SUPER, "hfsplus_put_super\n");
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200284
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300285 cancel_delayed_work_sync(&sbi->sync_work);
286
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200287 if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) {
288 struct hfsplus_vh *vhdr = sbi->s_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
290 vhdr->modify_date = hfsp_now2mt();
291 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
292 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
Christoph Hellwig3b5ce8a2010-11-23 14:37:43 +0100293
294 hfsplus_sync_fs(sb, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 }
296
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800297 hfs_btree_close(sbi->attr_tree);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200298 hfs_btree_close(sbi->cat_tree);
299 hfs_btree_close(sbi->ext_tree);
300 iput(sbi->alloc_file);
301 iput(sbi->hidden_dir);
Seth Forshee65965282011-07-18 08:06:23 -0700302 kfree(sbi->s_vhdr_buf);
303 kfree(sbi->s_backup_vhdr_buf);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200304 unload_nls(sbi->nls);
Colin Leroy945b0922005-05-01 08:59:16 -0700305 kfree(sb->s_fs_info);
306 sb->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307}
308
David Howells726c3342006-06-23 02:02:58 -0700309static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310{
David Howells726c3342006-06-23 02:02:58 -0700311 struct super_block *sb = dentry->d_sb;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200312 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
Coly Li25564dd2009-04-02 16:59:36 -0700313 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700314
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 buf->f_type = HFSPLUS_SUPER_MAGIC;
316 buf->f_bsize = sb->s_blocksize;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200317 buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
318 buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 buf->f_bavail = buf->f_bfree;
320 buf->f_files = 0xFFFFFFFF;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200321 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
Coly Li25564dd2009-04-02 16:59:36 -0700322 buf->f_fsid.val[0] = (u32)id;
323 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 buf->f_namelen = HFSPLUS_MAX_STRLEN;
325
326 return 0;
327}
328
329static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
330{
Theodore Ts'o02b99842014-03-13 10:14:33 -0400331 sync_filesystem(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
333 return 0;
334 if (!(*flags & MS_RDONLY)) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200335 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr;
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100336 int force = 0;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800337
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100338 if (!hfsplus_parse_options_remount(data, &force))
Roman Zippelb0b623c2005-11-29 19:34:41 -0800339 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700342 pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 sb->s_flags |= MS_RDONLY;
344 *flags |= MS_RDONLY;
Christoph Hellwig6f80dfe2010-11-07 23:01:17 +0100345 } else if (force) {
Roman Zippelb0b623c2005-11-29 19:34:41 -0800346 /* nothing */
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200347 } else if (vhdr->attributes &
348 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700349 pr_warn("filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 sb->s_flags |= MS_RDONLY;
351 *flags |= MS_RDONLY;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200352 } else if (vhdr->attributes &
353 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700354 pr_warn("filesystem is marked journaled, leaving read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800355 sb->s_flags |= MS_RDONLY;
356 *flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 }
358 }
359 return 0;
360}
361
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800362static const struct super_operations hfsplus_sops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 .alloc_inode = hfsplus_alloc_inode,
364 .destroy_inode = hfsplus_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 .write_inode = hfsplus_write_inode,
Al Virob57922d2010-06-07 14:34:48 -0400366 .evict_inode = hfsplus_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 .put_super = hfsplus_put_super,
Christoph Hellwig7fbc6df2009-06-08 10:05:12 +0200368 .sync_fs = hfsplus_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 .statfs = hfsplus_statfs,
370 .remount_fs = hfsplus_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700371 .show_options = hfsplus_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372};
373
374static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
375{
376 struct hfsplus_vh *vhdr;
377 struct hfsplus_sb_info *sbi;
378 hfsplus_cat_entry entry;
379 struct hfs_find_data fd;
David Howells63525392008-02-07 00:15:40 -0800380 struct inode *root, *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 struct qstr str;
382 struct nls_table *nls = NULL;
Christoph Hellwigf1fcd9f2011-09-15 10:48:40 -0400383 u64 last_fs_block, last_fs_page;
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700384 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Namjae Jeon497d48b2012-07-30 14:42:11 -0700386 err = -ENOMEM;
Wyatt Banksa5001a22007-07-15 23:40:50 -0700387 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 if (!sbi)
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700389 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 sb->s_fs_info = sbi;
Christoph Hellwig40bf48a2010-10-01 05:41:39 +0200392 mutex_init(&sbi->alloc_mutex);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200393 mutex_init(&sbi->vh_mutex);
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300394 spin_lock_init(&sbi->work_lock);
395 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700396 hfsplus_fill_defaults(sbi);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700397
398 err = -EINVAL;
Roman Zippel717dd80e2005-09-06 15:18:48 -0700399 if (!hfsplus_parse_options(data, sbi)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700400 pr_err("unable to parse mount options\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700401 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 }
403
404 /* temporarily use utf8 to correctly find the hidden dir below */
405 nls = sbi->nls;
406 sbi->nls = load_nls("utf8");
Joshua Kwanbd6a59b2006-01-06 00:09:45 -0800407 if (!sbi->nls) {
Joe Perchesd6142672013-04-30 15:27:55 -0700408 pr_err("unable to load nls for utf8\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700409 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 }
411
412 /* Grab the volume header */
413 if (hfsplus_read_wrapper(sb)) {
414 if (!silent)
Joe Perchesd6142672013-04-30 15:27:55 -0700415 pr_warn("unable to find HFS+ superblock\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700416 goto out_unload_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200418 vhdr = sbi->s_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
420 /* Copy parts of the volume header into the superblock */
David Elliott2179d372006-01-18 17:43:08 -0800421 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
422 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
423 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
Joe Perchesd6142672013-04-30 15:27:55 -0700424 pr_err("wrong filesystem version\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700425 goto out_free_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200427 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
428 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200429 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
430 sbi->file_count = be32_to_cpu(vhdr->file_count);
431 sbi->folder_count = be32_to_cpu(vhdr->folder_count);
432 sbi->data_clump_blocks =
433 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
434 if (!sbi->data_clump_blocks)
435 sbi->data_clump_blocks = 1;
436 sbi->rsrc_clump_blocks =
437 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
438 if (!sbi->rsrc_clump_blocks)
439 sbi->rsrc_clump_blocks = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
Christoph Hellwigf1fcd9f2011-09-15 10:48:40 -0400441 err = -EFBIG;
442 last_fs_block = sbi->total_blocks - 1;
443 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >>
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300444 PAGE_SHIFT;
Christoph Hellwigf1fcd9f2011-09-15 10:48:40 -0400445
446 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) ||
447 (last_fs_page > (pgoff_t)(~0ULL))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700448 pr_err("filesystem size too large\n");
Christoph Hellwigc6d5f5f2011-02-16 09:34:26 +0100449 goto out_free_vhdr;
450 }
451
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 /* Set up operations so we can load metadata */
453 sb->s_op = &hfsplus_sops;
454 sb->s_maxbytes = MAX_LFS_FILESIZE;
455
456 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Joe Perchesd6142672013-04-30 15:27:55 -0700457 pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 sb->s_flags |= MS_RDONLY;
Christoph Hellwig84adede2010-10-01 05:45:20 +0200459 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
Roman Zippelb0b623c2005-11-29 19:34:41 -0800460 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700462 pr_warn("Filesystem is marked locked, mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 sb->s_flags |= MS_RDONLY;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200464 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) &&
465 !(sb->s_flags & MS_RDONLY)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700466 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 -0800467 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 }
469
Christoph Hellwigc6d5f5f2011-02-16 09:34:26 +0100470 err = -EINVAL;
471
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 /* Load metadata objects (B*Trees) */
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200473 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
474 if (!sbi->ext_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700475 pr_err("failed to load extents file\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700476 goto out_free_vhdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200478 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
479 if (!sbi->cat_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700480 pr_err("failed to load catalog file\n");
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700481 goto out_close_ext_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 }
Vyacheslav Dubeyko95e0d7d2013-11-12 15:11:09 -0800483 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800484 if (vhdr->attr_file.total_blocks != 0) {
485 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
486 if (!sbi->attr_tree) {
Joe Perchesd6142672013-04-30 15:27:55 -0700487 pr_err("failed to load attributes file\n");
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800488 goto out_close_cat_tree;
489 }
Vyacheslav Dubeyko95e0d7d2013-11-12 15:11:09 -0800490 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800491 }
492 sb->s_xattr = hfsplus_xattr_handlers;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
David Howells63525392008-02-07 00:15:40 -0800494 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
495 if (IS_ERR(inode)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700496 pr_err("failed to load allocation file\n");
David Howells63525392008-02-07 00:15:40 -0800497 err = PTR_ERR(inode);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800498 goto out_close_attr_tree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200500 sbi->alloc_file = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
502 /* Load the root directory */
David Howells63525392008-02-07 00:15:40 -0800503 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
504 if (IS_ERR(root)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700505 pr_err("failed to load root directory\n");
David Howells63525392008-02-07 00:15:40 -0800506 err = PTR_ERR(root);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700507 goto out_put_alloc_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 }
509
Al Viro68acb8e2012-02-12 22:07:07 -0500510 sb->s_d_op = &hfsplus_dentry_operations;
511 sb->s_root = d_make_root(root);
512 if (!sb->s_root) {
513 err = -ENOMEM;
514 goto out_put_alloc_file;
515 }
516
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
518 str.name = HFSP_HIDDENDIR_NAME;
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +0400519 err = hfs_find_init(sbi->cat_tree, &fd);
520 if (err)
521 goto out_put_root;
Sougata Santra89ac9b42014-12-18 16:17:12 -0800522 err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
523 if (unlikely(err < 0))
524 goto out_put_root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
526 hfs_find_exit(&fd);
527 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700528 goto out_put_root;
David Howells63525392008-02-07 00:15:40 -0800529 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
530 if (IS_ERR(inode)) {
531 err = PTR_ERR(inode);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700532 goto out_put_root;
David Howells63525392008-02-07 00:15:40 -0800533 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200534 sbi->hidden_dir = inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 } else
536 hfs_find_exit(&fd);
537
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700538 if (!(sb->s_flags & MS_RDONLY)) {
539 /*
540 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
541 * all three are registered with Apple for our use
542 */
543 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
544 vhdr->modify_date = hfsp_now2mt();
545 be32_add_cpu(&vhdr->write_count, 1);
546 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
547 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
548 hfsplus_sync_fs(sb, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700550 if (!sbi->hidden_dir) {
551 mutex_lock(&sbi->vh_mutex);
552 sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
Al Virob3f2a922012-01-10 17:48:52 -0500553 if (!sbi->hidden_dir) {
554 mutex_unlock(&sbi->vh_mutex);
555 err = -ENOMEM;
556 goto out_put_root;
557 }
558 err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root,
559 &str, sbi->hidden_dir);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800560 if (err) {
561 mutex_unlock(&sbi->vh_mutex);
Al Virob3f2a922012-01-10 17:48:52 -0500562 goto out_put_hidden_dir;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800563 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800565 err = hfsplus_init_inode_security(sbi->hidden_dir,
566 root, &str);
567 if (err == -EOPNOTSUPP)
568 err = 0; /* Operation is not supported. */
569 else if (err) {
570 /*
571 * Try to delete anyway without
572 * error analysis.
573 */
574 hfsplus_delete_cat(sbi->hidden_dir->i_ino,
575 root, &str);
576 mutex_unlock(&sbi->vh_mutex);
577 goto out_put_hidden_dir;
578 }
579
580 mutex_unlock(&sbi->vh_mutex);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700581 hfsplus_mark_inode_dirty(sbi->hidden_dir,
582 HFSPLUS_I_CAT_DIRTY);
583 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 }
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 unload_nls(sbi->nls);
587 sbi->nls = nls;
588 return 0;
589
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700590out_put_hidden_dir:
591 iput(sbi->hidden_dir);
592out_put_root:
Al Viro68acb8e2012-02-12 22:07:07 -0500593 dput(sb->s_root);
594 sb->s_root = NULL;
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700595out_put_alloc_file:
596 iput(sbi->alloc_file);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800597out_close_attr_tree:
598 hfs_btree_close(sbi->attr_tree);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700599out_close_cat_tree:
600 hfs_btree_close(sbi->cat_tree);
601out_close_ext_tree:
602 hfs_btree_close(sbi->ext_tree);
603out_free_vhdr:
Seth Forsheef588c962011-09-15 10:48:27 -0400604 kfree(sbi->s_vhdr_buf);
605 kfree(sbi->s_backup_vhdr_buf);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700606out_unload_nls:
607 unload_nls(sbi->nls);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000608 unload_nls(nls);
Christoph Hellwigc5b8d0b2011-02-02 09:32:39 -0700609 kfree(sbi);
610out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 return err;
612}
613
614MODULE_AUTHOR("Brad Boyer");
615MODULE_DESCRIPTION("Extended Macintosh Filesystem");
616MODULE_LICENSE("GPL");
617
Christoph Lametere18b8902006-12-06 20:33:20 -0800618static struct kmem_cache *hfsplus_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
620static struct inode *hfsplus_alloc_inode(struct super_block *sb)
621{
622 struct hfsplus_inode_info *i;
623
Christoph Lametere94b1762006-12-06 20:33:17 -0800624 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 return i ? &i->vfs_inode : NULL;
626}
627
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100628static void hfsplus_i_callback(struct rcu_head *head)
629{
630 struct inode *inode = container_of(head, struct inode, i_rcu);
631
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100632 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
633}
634
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635static void hfsplus_destroy_inode(struct inode *inode)
636{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100637 call_rcu(&inode->i_rcu, hfsplus_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638}
639
640#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
641
Al Viro152a0832010-07-25 00:46:55 +0400642static struct dentry *hfsplus_mount(struct file_system_type *fs_type,
643 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644{
Al Viro152a0832010-07-25 00:46:55 +0400645 return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646}
647
648static struct file_system_type hfsplus_fs_type = {
649 .owner = THIS_MODULE,
650 .name = "hfsplus",
Al Viro152a0832010-07-25 00:46:55 +0400651 .mount = hfsplus_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 .kill_sb = kill_block_super,
653 .fs_flags = FS_REQUIRES_DEV,
654};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800655MODULE_ALIAS_FS("hfsplus");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700657static void hfsplus_init_once(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658{
659 struct hfsplus_inode_info *i = p;
660
Christoph Lametera35afb82007-05-16 22:10:57 -0700661 inode_init_once(&i->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662}
663
664static int __init init_hfsplus_fs(void)
665{
666 int err;
667
668 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
Vladimir Davydov5d097052016-01-14 15:18:21 -0800669 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
Paul Mundt20c2df82007-07-20 10:11:58 +0900670 hfsplus_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 if (!hfsplus_inode_cachep)
672 return -ENOMEM;
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800673 err = hfsplus_create_attr_tree_cache();
674 if (err)
675 goto destroy_inode_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 err = register_filesystem(&hfsplus_fs_type);
677 if (err)
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800678 goto destroy_attr_tree_cache;
679 return 0;
680
681destroy_attr_tree_cache:
682 hfsplus_destroy_attr_tree_cache();
683
684destroy_inode_cache:
685 kmem_cache_destroy(hfsplus_inode_cachep);
686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 return err;
688}
689
690static void __exit exit_hfsplus_fs(void)
691{
692 unregister_filesystem(&hfsplus_fs_type);
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000693
694 /*
695 * Make sure all delayed rcu free inodes are flushed before we
696 * destroy cache.
697 */
698 rcu_barrier();
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800699 hfsplus_destroy_attr_tree_cache();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700700 kmem_cache_destroy(hfsplus_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701}
702
703module_init(init_hfsplus_fs)
704module_exit(exit_hfsplus_fs)