Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/module.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/pagemap.h> |
| 13 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/slab.h> |
Alexey Dobriyan | 405f557 | 2009-07-11 22:08:37 +0400 | [diff] [blame] | 15 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/vfs.h> |
| 17 | #include <linux/nls.h> |
| 18 | |
| 19 | static struct inode *hfsplus_alloc_inode(struct super_block *sb); |
| 20 | static void hfsplus_destroy_inode(struct inode *inode); |
| 21 | |
| 22 | #include "hfsplus_fs.h" |
| 23 | |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 24 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | { |
| 26 | struct hfs_find_data fd; |
| 27 | struct hfsplus_vh *vhdr; |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 28 | struct inode *inode; |
| 29 | long err = -EIO; |
| 30 | |
| 31 | inode = iget_locked(sb, ino); |
| 32 | if (!inode) |
| 33 | return ERR_PTR(-ENOMEM); |
| 34 | if (!(inode->i_state & I_NEW)) |
| 35 | return inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); |
Matthias Kaehlcke | 895c23f | 2008-07-25 01:46:36 -0700 | [diff] [blame] | 38 | mutex_init(&HFSPLUS_I(inode).extents_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | HFSPLUS_I(inode).flags = 0; |
| 40 | HFSPLUS_I(inode).rsrc_inode = NULL; |
Peter Wainwright | 94c1d31 | 2005-10-26 01:59:02 -0700 | [diff] [blame] | 41 | atomic_set(&HFSPLUS_I(inode).opencnt, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { |
| 44 | read_inode: |
| 45 | hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); |
| 46 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); |
| 47 | if (!err) |
| 48 | err = hfsplus_cat_read_inode(inode, &fd); |
| 49 | hfs_find_exit(&fd); |
| 50 | if (err) |
| 51 | goto bad_inode; |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 52 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | } |
| 54 | vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; |
| 55 | switch(inode->i_ino) { |
| 56 | case HFSPLUS_ROOT_CNID: |
| 57 | goto read_inode; |
| 58 | case HFSPLUS_EXT_CNID: |
| 59 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); |
| 60 | inode->i_mapping->a_ops = &hfsplus_btree_aops; |
| 61 | break; |
| 62 | case HFSPLUS_CAT_CNID: |
| 63 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); |
| 64 | inode->i_mapping->a_ops = &hfsplus_btree_aops; |
| 65 | break; |
| 66 | case HFSPLUS_ALLOC_CNID: |
| 67 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); |
| 68 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 69 | break; |
| 70 | case HFSPLUS_START_CNID: |
| 71 | hfsplus_inode_read_fork(inode, &vhdr->start_file); |
| 72 | break; |
| 73 | case HFSPLUS_ATTR_CNID: |
| 74 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); |
| 75 | inode->i_mapping->a_ops = &hfsplus_btree_aops; |
| 76 | break; |
| 77 | default: |
| 78 | goto bad_inode; |
| 79 | } |
| 80 | |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 81 | done: |
| 82 | unlock_new_inode(inode); |
| 83 | return inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 85 | bad_inode: |
| 86 | iget_failed(inode); |
| 87 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 90 | static int hfsplus_write_inode(struct inode *inode, |
| 91 | struct writeback_control *wbc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | { |
| 93 | struct hfsplus_vh *vhdr; |
| 94 | int ret = 0; |
| 95 | |
| 96 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); |
| 97 | hfsplus_ext_write_extent(inode); |
| 98 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { |
| 99 | return hfsplus_cat_write_inode(inode); |
| 100 | } |
| 101 | vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; |
| 102 | switch (inode->i_ino) { |
| 103 | case HFSPLUS_ROOT_CNID: |
| 104 | ret = hfsplus_cat_write_inode(inode); |
| 105 | break; |
| 106 | case HFSPLUS_EXT_CNID: |
| 107 | if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) { |
| 108 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; |
| 109 | inode->i_sb->s_dirt = 1; |
| 110 | } |
| 111 | hfsplus_inode_write_fork(inode, &vhdr->ext_file); |
| 112 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree); |
| 113 | break; |
| 114 | case HFSPLUS_CAT_CNID: |
| 115 | if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) { |
| 116 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; |
| 117 | inode->i_sb->s_dirt = 1; |
| 118 | } |
| 119 | hfsplus_inode_write_fork(inode, &vhdr->cat_file); |
| 120 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree); |
| 121 | break; |
| 122 | case HFSPLUS_ALLOC_CNID: |
| 123 | if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) { |
| 124 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; |
| 125 | inode->i_sb->s_dirt = 1; |
| 126 | } |
| 127 | hfsplus_inode_write_fork(inode, &vhdr->alloc_file); |
| 128 | break; |
| 129 | case HFSPLUS_START_CNID: |
| 130 | if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) { |
| 131 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; |
| 132 | inode->i_sb->s_dirt = 1; |
| 133 | } |
| 134 | hfsplus_inode_write_fork(inode, &vhdr->start_file); |
| 135 | break; |
| 136 | case HFSPLUS_ATTR_CNID: |
| 137 | if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) { |
| 138 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; |
| 139 | inode->i_sb->s_dirt = 1; |
| 140 | } |
| 141 | hfsplus_inode_write_fork(inode, &vhdr->attr_file); |
| 142 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree); |
| 143 | break; |
| 144 | } |
| 145 | return ret; |
| 146 | } |
| 147 | |
| 148 | static void hfsplus_clear_inode(struct inode *inode) |
| 149 | { |
| 150 | dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | if (HFSPLUS_IS_RSRC(inode)) { |
| 152 | HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL; |
| 153 | iput(HFSPLUS_I(inode).rsrc_inode); |
| 154 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | } |
| 156 | |
Christoph Hellwig | 7fbc6df | 2009-06-08 10:05:12 +0200 | [diff] [blame] | 157 | static int hfsplus_sync_fs(struct super_block *sb, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
| 159 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; |
| 160 | |
| 161 | dprint(DBG_SUPER, "hfsplus_write_super\n"); |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 162 | |
| 163 | lock_super(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | sb->s_dirt = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks); |
| 167 | vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc); |
| 168 | vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid); |
| 169 | vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count); |
| 170 | vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count); |
| 171 | |
| 172 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); |
| 173 | if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) { |
| 174 | if (HFSPLUS_SB(sb).sect_count) { |
| 175 | struct buffer_head *bh; |
| 176 | u32 block, offset; |
| 177 | |
| 178 | block = HFSPLUS_SB(sb).blockoffset; |
| 179 | block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9); |
| 180 | offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1); |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 181 | printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | HFSPLUS_SB(sb).sect_count, block, offset); |
| 183 | bh = sb_bread(sb, block); |
| 184 | if (bh) { |
| 185 | vhdr = (struct hfsplus_vh *)(bh->b_data + offset); |
| 186 | if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) { |
| 187 | memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr)); |
| 188 | mark_buffer_dirty(bh); |
| 189 | brelse(bh); |
| 190 | } else |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 191 | printk(KERN_WARNING "hfs: backup not found!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | } |
| 193 | } |
| 194 | HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP; |
| 195 | } |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 196 | unlock_super(sb); |
Christoph Hellwig | 7fbc6df | 2009-06-08 10:05:12 +0200 | [diff] [blame] | 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | static void hfsplus_write_super(struct super_block *sb) |
| 201 | { |
| 202 | if (!(sb->s_flags & MS_RDONLY)) |
| 203 | hfsplus_sync_fs(sb, 1); |
| 204 | else |
| 205 | sb->s_dirt = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | static void hfsplus_put_super(struct super_block *sb) |
| 209 | { |
| 210 | dprint(DBG_SUPER, "hfsplus_put_super\n"); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 211 | if (!sb->s_fs_info) |
| 212 | return; |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 213 | |
| 214 | lock_kernel(); |
| 215 | |
Christoph Hellwig | 8c85e12 | 2009-04-28 18:00:26 +0200 | [diff] [blame] | 216 | if (sb->s_dirt) |
| 217 | hfsplus_write_super(sb); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 218 | if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; |
| 220 | |
| 221 | vhdr->modify_date = hfsp_now2mt(); |
| 222 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); |
| 223 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); |
| 224 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); |
Jan Kara | e39f07c | 2005-09-06 15:19:16 -0700 | [diff] [blame] | 225 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | hfs_btree_close(HFSPLUS_SB(sb).cat_tree); |
| 229 | hfs_btree_close(HFSPLUS_SB(sb).ext_tree); |
| 230 | iput(HFSPLUS_SB(sb).alloc_file); |
| 231 | iput(HFSPLUS_SB(sb).hidden_dir); |
| 232 | brelse(HFSPLUS_SB(sb).s_vhbh); |
Thomas Gleixner | 6d729e4 | 2009-08-16 21:05:08 +0000 | [diff] [blame] | 233 | unload_nls(HFSPLUS_SB(sb).nls); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 234 | kfree(sb->s_fs_info); |
| 235 | sb->s_fs_info = NULL; |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 236 | |
| 237 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | } |
| 239 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 240 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 242 | struct super_block *sb = dentry->d_sb; |
Coly Li | 25564dd | 2009-04-02 16:59:36 -0700 | [diff] [blame] | 243 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
| 246 | buf->f_bsize = sb->s_blocksize; |
| 247 | buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift; |
| 248 | buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift; |
| 249 | buf->f_bavail = buf->f_bfree; |
| 250 | buf->f_files = 0xFFFFFFFF; |
| 251 | buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid; |
Coly Li | 25564dd | 2009-04-02 16:59:36 -0700 | [diff] [blame] | 252 | buf->f_fsid.val[0] = (u32)id; |
| 253 | buf->f_fsid.val[1] = (u32)(id >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
| 255 | |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) |
| 260 | { |
| 261 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
| 262 | return 0; |
| 263 | if (!(*flags & MS_RDONLY)) { |
| 264 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; |
Roman Zippel | b0b623c | 2005-11-29 19:34:41 -0800 | [diff] [blame] | 265 | struct hfsplus_sb_info sbi; |
| 266 | |
| 267 | memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); |
| 268 | sbi.nls = HFSPLUS_SB(sb).nls; |
| 269 | if (!hfsplus_parse_options(data, &sbi)) |
| 270 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
| 272 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 273 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | "running fsck.hfsplus is recommended. leaving read-only.\n"); |
| 275 | sb->s_flags |= MS_RDONLY; |
| 276 | *flags |= MS_RDONLY; |
Roman Zippel | b0b623c | 2005-11-29 19:34:41 -0800 | [diff] [blame] | 277 | } else if (sbi.flags & HFSPLUS_SB_FORCE) { |
| 278 | /* nothing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 280 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | sb->s_flags |= MS_RDONLY; |
| 282 | *flags |= MS_RDONLY; |
Roman Zippel | b0b623c | 2005-11-29 19:34:41 -0800 | [diff] [blame] | 283 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 284 | printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); |
Roman Zippel | b0b623c | 2005-11-29 19:34:41 -0800 | [diff] [blame] | 285 | sb->s_flags |= MS_RDONLY; |
| 286 | *flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | } |
| 289 | return 0; |
| 290 | } |
| 291 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 292 | static const struct super_operations hfsplus_sops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | .alloc_inode = hfsplus_alloc_inode, |
| 294 | .destroy_inode = hfsplus_destroy_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | .write_inode = hfsplus_write_inode, |
| 296 | .clear_inode = hfsplus_clear_inode, |
| 297 | .put_super = hfsplus_put_super, |
| 298 | .write_super = hfsplus_write_super, |
Christoph Hellwig | 7fbc6df | 2009-06-08 10:05:12 +0200 | [diff] [blame] | 299 | .sync_fs = hfsplus_sync_fs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | .statfs = hfsplus_statfs, |
| 301 | .remount_fs = hfsplus_remount, |
Roman Zippel | 717dd80 | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 302 | .show_options = hfsplus_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | }; |
| 304 | |
| 305 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) |
| 306 | { |
| 307 | struct hfsplus_vh *vhdr; |
| 308 | struct hfsplus_sb_info *sbi; |
| 309 | hfsplus_cat_entry entry; |
| 310 | struct hfs_find_data fd; |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 311 | struct inode *root, *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | struct qstr str; |
| 313 | struct nls_table *nls = NULL; |
| 314 | int err = -EINVAL; |
| 315 | |
Wyatt Banks | a5001a2 | 2007-07-15 23:40:50 -0700 | [diff] [blame] | 316 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | if (!sbi) |
| 318 | return -ENOMEM; |
| 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | sb->s_fs_info = sbi; |
| 321 | INIT_HLIST_HEAD(&sbi->rsrc_inodes); |
Roman Zippel | 717dd80 | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 322 | hfsplus_fill_defaults(sbi); |
| 323 | if (!hfsplus_parse_options(data, sbi)) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 324 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | err = -EINVAL; |
| 326 | goto cleanup; |
| 327 | } |
| 328 | |
| 329 | /* temporarily use utf8 to correctly find the hidden dir below */ |
| 330 | nls = sbi->nls; |
| 331 | sbi->nls = load_nls("utf8"); |
Joshua Kwan | bd6a59b | 2006-01-06 00:09:45 -0800 | [diff] [blame] | 332 | if (!sbi->nls) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 333 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | err = -EINVAL; |
| 335 | goto cleanup; |
| 336 | } |
| 337 | |
| 338 | /* Grab the volume header */ |
| 339 | if (hfsplus_read_wrapper(sb)) { |
| 340 | if (!silent) |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 341 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | err = -EINVAL; |
| 343 | goto cleanup; |
| 344 | } |
| 345 | vhdr = HFSPLUS_SB(sb).s_vhdr; |
| 346 | |
| 347 | /* Copy parts of the volume header into the superblock */ |
David Elliott | 2179d37 | 2006-01-18 17:43:08 -0800 | [diff] [blame] | 348 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
| 349 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || |
| 350 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 351 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | goto cleanup; |
| 353 | } |
| 354 | HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks); |
| 355 | HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks); |
| 356 | HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc); |
| 357 | HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid); |
| 358 | HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count); |
| 359 | HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count); |
| 360 | HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; |
| 361 | if (!HFSPLUS_SB(sb).data_clump_blocks) |
| 362 | HFSPLUS_SB(sb).data_clump_blocks = 1; |
| 363 | HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; |
| 364 | if (!HFSPLUS_SB(sb).rsrc_clump_blocks) |
| 365 | HFSPLUS_SB(sb).rsrc_clump_blocks = 1; |
| 366 | |
| 367 | /* Set up operations so we can load metadata */ |
| 368 | sb->s_op = &hfsplus_sops; |
| 369 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 370 | |
| 371 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 372 | printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " |
| 373 | "running fsck.hfsplus is recommended. mounting read-only.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | sb->s_flags |= MS_RDONLY; |
Roman Zippel | b0b623c | 2005-11-29 19:34:41 -0800 | [diff] [blame] | 375 | } else if (sbi->flags & HFSPLUS_SB_FORCE) { |
| 376 | /* nothing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 378 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | sb->s_flags |= MS_RDONLY; |
Mike Crowe | 81a7371 | 2008-10-15 22:04:05 -0700 | [diff] [blame] | 380 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { |
Dave Jones | 355a469 | 2008-04-29 16:01:22 -0400 | [diff] [blame] | 381 | printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 382 | "use the force option at your own risk, mounting read-only.\n"); |
Roman Zippel | b0b623c | 2005-11-29 19:34:41 -0800 | [diff] [blame] | 383 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
Roman Zippel | b0b623c | 2005-11-29 19:34:41 -0800 | [diff] [blame] | 385 | sbi->flags &= ~HFSPLUS_SB_FORCE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | /* Load metadata objects (B*Trees) */ |
| 388 | HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
| 389 | if (!HFSPLUS_SB(sb).ext_tree) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 390 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | goto cleanup; |
| 392 | } |
| 393 | HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
| 394 | if (!HFSPLUS_SB(sb).cat_tree) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 395 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | goto cleanup; |
| 397 | } |
| 398 | |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 399 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
| 400 | if (IS_ERR(inode)) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 401 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 402 | err = PTR_ERR(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | goto cleanup; |
| 404 | } |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 405 | HFSPLUS_SB(sb).alloc_file = inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
| 407 | /* Load the root directory */ |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 408 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
| 409 | if (IS_ERR(root)) { |
| 410 | printk(KERN_ERR "hfs: failed to load root directory\n"); |
| 411 | err = PTR_ERR(root); |
| 412 | goto cleanup; |
| 413 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | sb->s_root = d_alloc_root(root); |
| 415 | if (!sb->s_root) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | iput(root); |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 417 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | goto cleanup; |
| 419 | } |
Duane Griffin | d45bce8 | 2007-07-15 23:41:23 -0700 | [diff] [blame] | 420 | sb->s_root->d_op = &hfsplus_dentry_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
| 422 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; |
| 423 | str.name = HFSP_HIDDENDIR_NAME; |
| 424 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); |
| 425 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
| 426 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { |
| 427 | hfs_find_exit(&fd); |
| 428 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) |
| 429 | goto cleanup; |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 430 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
| 431 | if (IS_ERR(inode)) { |
| 432 | err = PTR_ERR(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | goto cleanup; |
David Howells | 6352539 | 2008-02-07 00:15:40 -0800 | [diff] [blame] | 434 | } |
| 435 | HFSPLUS_SB(sb).hidden_dir = inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | } else |
| 437 | hfs_find_exit(&fd); |
| 438 | |
| 439 | if (sb->s_flags & MS_RDONLY) |
| 440 | goto out; |
| 441 | |
| 442 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused |
| 443 | * all three are registered with Apple for our use |
| 444 | */ |
| 445 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); |
| 446 | vhdr->modify_date = hfsp_now2mt(); |
Marcin Slusarz | 20c79e7 | 2008-04-30 00:54:47 -0700 | [diff] [blame] | 447 | be32_add_cpu(&vhdr->write_count, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
| 449 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); |
| 450 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); |
Jan Kara | e39f07c | 2005-09-06 15:19:16 -0700 | [diff] [blame] | 451 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
| 453 | if (!HFSPLUS_SB(sb).hidden_dir) { |
Roman Zippel | 634725a | 2006-01-18 17:43:05 -0800 | [diff] [blame] | 454 | printk(KERN_DEBUG "hfs: create hidden dir...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
| 456 | hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode, |
| 457 | &str, HFSPLUS_SB(sb).hidden_dir); |
| 458 | mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir); |
| 459 | } |
| 460 | out: |
| 461 | unload_nls(sbi->nls); |
| 462 | sbi->nls = nls; |
| 463 | return 0; |
| 464 | |
| 465 | cleanup: |
| 466 | hfsplus_put_super(sb); |
Thomas Gleixner | 6d729e4 | 2009-08-16 21:05:08 +0000 | [diff] [blame] | 467 | unload_nls(nls); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | return err; |
| 469 | } |
| 470 | |
| 471 | MODULE_AUTHOR("Brad Boyer"); |
| 472 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); |
| 473 | MODULE_LICENSE("GPL"); |
| 474 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 475 | static struct kmem_cache *hfsplus_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
| 477 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) |
| 478 | { |
| 479 | struct hfsplus_inode_info *i; |
| 480 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 481 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | return i ? &i->vfs_inode : NULL; |
| 483 | } |
| 484 | |
| 485 | static void hfsplus_destroy_inode(struct inode *inode) |
| 486 | { |
| 487 | kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode)); |
| 488 | } |
| 489 | |
| 490 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) |
| 491 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 492 | static int hfsplus_get_sb(struct file_system_type *fs_type, |
| 493 | int flags, const char *dev_name, void *data, |
| 494 | struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 496 | return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super, |
| 497 | mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
| 499 | |
| 500 | static struct file_system_type hfsplus_fs_type = { |
| 501 | .owner = THIS_MODULE, |
| 502 | .name = "hfsplus", |
| 503 | .get_sb = hfsplus_get_sb, |
| 504 | .kill_sb = kill_block_super, |
| 505 | .fs_flags = FS_REQUIRES_DEV, |
| 506 | }; |
| 507 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 508 | static void hfsplus_init_once(void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | { |
| 510 | struct hfsplus_inode_info *i = p; |
| 511 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 512 | inode_init_once(&i->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | static int __init init_hfsplus_fs(void) |
| 516 | { |
| 517 | int err; |
| 518 | |
| 519 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", |
| 520 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 521 | hfsplus_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | if (!hfsplus_inode_cachep) |
| 523 | return -ENOMEM; |
| 524 | err = register_filesystem(&hfsplus_fs_type); |
| 525 | if (err) |
| 526 | kmem_cache_destroy(hfsplus_inode_cachep); |
| 527 | return err; |
| 528 | } |
| 529 | |
| 530 | static void __exit exit_hfsplus_fs(void) |
| 531 | { |
| 532 | unregister_filesystem(&hfsplus_fs_type); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 533 | kmem_cache_destroy(hfsplus_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | module_init(init_hfsplus_fs) |
| 537 | module_exit(exit_hfsplus_fs) |