Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/hfs/super.c |
| 3 | * |
| 4 | * Copyright (C) 1995-1997 Paul H. Hargrove |
| 5 | * (C) 2003 Ardis Technologies <roman@ardistech.com> |
| 6 | * This file may be distributed under the terms of the GNU General Public License. |
| 7 | * |
| 8 | * This file contains hfs_read_super(), some of the super_ops and |
| 9 | * init_module() and cleanup_module(). The remaining super_ops are in |
| 10 | * inode.c since they deal with inodes. |
| 11 | * |
| 12 | * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds |
| 13 | */ |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/blkdev.h> |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 17 | #include <linux/mount.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/init.h> |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 19 | #include <linux/nls.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/parser.h> |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 21 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/vfs.h> |
| 23 | |
| 24 | #include "hfs_fs.h" |
| 25 | #include "btree.h" |
| 26 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 27 | static struct kmem_cache *hfs_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | MODULE_LICENSE("GPL"); |
| 30 | |
| 31 | /* |
| 32 | * hfs_write_super() |
| 33 | * |
| 34 | * Description: |
| 35 | * This function is called by the VFS only. When the filesystem |
| 36 | * is mounted r/w it updates the MDB on disk. |
| 37 | * Input Variable(s): |
| 38 | * struct super_block *sb: Pointer to the hfs superblock |
| 39 | * Output Variable(s): |
| 40 | * NONE |
| 41 | * Returns: |
| 42 | * void |
| 43 | * Preconditions: |
| 44 | * 'sb' points to a "valid" (struct super_block). |
| 45 | * Postconditions: |
| 46 | * The MDB is marked 'unsuccessfully unmounted' by clearing bit 8 of drAtrb |
| 47 | * (hfs_put_super() must set this flag!). Some MDB fields are updated |
| 48 | * and the MDB buffer is written to disk by calling hfs_mdb_commit(). |
| 49 | */ |
| 50 | static void hfs_write_super(struct super_block *sb) |
| 51 | { |
| 52 | sb->s_dirt = 0; |
| 53 | if (sb->s_flags & MS_RDONLY) |
| 54 | return; |
| 55 | /* sync everything to the buffers */ |
| 56 | hfs_mdb_commit(sb); |
| 57 | } |
| 58 | |
| 59 | /* |
| 60 | * hfs_put_super() |
| 61 | * |
| 62 | * This is the put_super() entry in the super_operations structure for |
| 63 | * HFS filesystems. The purpose is to release the resources |
| 64 | * associated with the superblock sb. |
| 65 | */ |
| 66 | static void hfs_put_super(struct super_block *sb) |
| 67 | { |
| 68 | hfs_mdb_close(sb); |
| 69 | /* release the MDB's resources */ |
| 70 | hfs_mdb_put(sb); |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * hfs_statfs() |
| 75 | * |
| 76 | * This is the statfs() entry in the super_operations structure for |
| 77 | * HFS filesystems. The purpose is to return various data about the |
| 78 | * filesystem. |
| 79 | * |
| 80 | * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks. |
| 81 | */ |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 82 | static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 84 | struct super_block *sb = dentry->d_sb; |
| 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | buf->f_type = HFS_SUPER_MAGIC; |
| 87 | buf->f_bsize = sb->s_blocksize; |
| 88 | buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div; |
| 89 | buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div; |
| 90 | buf->f_bavail = buf->f_bfree; |
| 91 | buf->f_files = HFS_SB(sb)->fs_ablocks; |
| 92 | buf->f_ffree = HFS_SB(sb)->free_ablocks; |
| 93 | buf->f_namelen = HFS_NAMELEN; |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | static int hfs_remount(struct super_block *sb, int *flags, char *data) |
| 99 | { |
| 100 | *flags |= MS_NODIRATIME; |
| 101 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
| 102 | return 0; |
| 103 | if (!(*flags & MS_RDONLY)) { |
| 104 | if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 105 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | "running fsck.hfs is recommended. leaving read-only.\n"); |
| 107 | sb->s_flags |= MS_RDONLY; |
| 108 | *flags |= MS_RDONLY; |
| 109 | } else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 110 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | sb->s_flags |= MS_RDONLY; |
| 112 | *flags |= MS_RDONLY; |
| 113 | } |
| 114 | } |
| 115 | return 0; |
| 116 | } |
| 117 | |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 118 | static int hfs_show_options(struct seq_file *seq, struct vfsmount *mnt) |
| 119 | { |
| 120 | struct hfs_sb_info *sbi = HFS_SB(mnt->mnt_sb); |
| 121 | |
| 122 | if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f)) |
| 123 | seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator); |
| 124 | if (sbi->s_type != cpu_to_be32(0x3f3f3f3f)) |
| 125 | seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type); |
| 126 | seq_printf(seq, ",uid=%u,gid=%u", sbi->s_uid, sbi->s_gid); |
| 127 | if (sbi->s_file_umask != 0133) |
| 128 | seq_printf(seq, ",file_umask=%o", sbi->s_file_umask); |
| 129 | if (sbi->s_dir_umask != 0022) |
| 130 | seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask); |
| 131 | if (sbi->part >= 0) |
| 132 | seq_printf(seq, ",part=%u", sbi->part); |
| 133 | if (sbi->session >= 0) |
| 134 | seq_printf(seq, ",session=%u", sbi->session); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 135 | if (sbi->nls_disk) |
| 136 | seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset); |
| 137 | if (sbi->nls_io) |
| 138 | seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset); |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 139 | if (sbi->s_quiet) |
| 140 | seq_printf(seq, ",quiet"); |
| 141 | return 0; |
| 142 | } |
| 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | static struct inode *hfs_alloc_inode(struct super_block *sb) |
| 145 | { |
| 146 | struct hfs_inode_info *i; |
| 147 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 148 | i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | return i ? &i->vfs_inode : NULL; |
| 150 | } |
| 151 | |
| 152 | static void hfs_destroy_inode(struct inode *inode) |
| 153 | { |
| 154 | kmem_cache_free(hfs_inode_cachep, HFS_I(inode)); |
| 155 | } |
| 156 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 157 | static const struct super_operations hfs_super_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | .alloc_inode = hfs_alloc_inode, |
| 159 | .destroy_inode = hfs_destroy_inode, |
| 160 | .write_inode = hfs_write_inode, |
| 161 | .clear_inode = hfs_clear_inode, |
| 162 | .put_super = hfs_put_super, |
| 163 | .write_super = hfs_write_super, |
| 164 | .statfs = hfs_statfs, |
| 165 | .remount_fs = hfs_remount, |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 166 | .show_options = hfs_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | }; |
| 168 | |
| 169 | enum { |
| 170 | opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask, |
| 171 | opt_part, opt_session, opt_type, opt_creator, opt_quiet, |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 172 | opt_codepage, opt_iocharset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | opt_err |
| 174 | }; |
| 175 | |
| 176 | static match_table_t tokens = { |
| 177 | { opt_uid, "uid=%u" }, |
| 178 | { opt_gid, "gid=%u" }, |
| 179 | { opt_umask, "umask=%o" }, |
| 180 | { opt_file_umask, "file_umask=%o" }, |
| 181 | { opt_dir_umask, "dir_umask=%o" }, |
| 182 | { opt_part, "part=%u" }, |
| 183 | { opt_session, "session=%u" }, |
| 184 | { opt_type, "type=%s" }, |
| 185 | { opt_creator, "creator=%s" }, |
| 186 | { opt_quiet, "quiet" }, |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 187 | { opt_codepage, "codepage=%s" }, |
| 188 | { opt_iocharset, "iocharset=%s" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | { opt_err, NULL } |
| 190 | }; |
| 191 | |
| 192 | static inline int match_fourchar(substring_t *arg, u32 *result) |
| 193 | { |
| 194 | if (arg->to - arg->from != 4) |
| 195 | return -EINVAL; |
| 196 | memcpy(result, arg->from, 4); |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * parse_options() |
| 202 | * |
| 203 | * adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger |
| 204 | * This function is called by hfs_read_super() to parse the mount options. |
| 205 | */ |
| 206 | static int parse_options(char *options, struct hfs_sb_info *hsb) |
| 207 | { |
| 208 | char *p; |
| 209 | substring_t args[MAX_OPT_ARGS]; |
| 210 | int tmp, token; |
| 211 | |
| 212 | /* initialize the sb with defaults */ |
| 213 | hsb->s_uid = current->uid; |
| 214 | hsb->s_gid = current->gid; |
| 215 | hsb->s_file_umask = 0133; |
| 216 | hsb->s_dir_umask = 0022; |
| 217 | hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */ |
| 218 | hsb->s_quiet = 0; |
| 219 | hsb->part = -1; |
| 220 | hsb->session = -1; |
| 221 | |
| 222 | if (!options) |
| 223 | return 1; |
| 224 | |
| 225 | while ((p = strsep(&options, ",")) != NULL) { |
| 226 | if (!*p) |
| 227 | continue; |
| 228 | |
| 229 | token = match_token(p, tokens, args); |
| 230 | switch (token) { |
| 231 | case opt_uid: |
| 232 | if (match_int(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 233 | printk(KERN_ERR "hfs: uid requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return 0; |
| 235 | } |
| 236 | hsb->s_uid = (uid_t)tmp; |
| 237 | break; |
| 238 | case opt_gid: |
| 239 | if (match_int(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 240 | printk(KERN_ERR "hfs: gid requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | return 0; |
| 242 | } |
| 243 | hsb->s_gid = (gid_t)tmp; |
| 244 | break; |
| 245 | case opt_umask: |
| 246 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 247 | printk(KERN_ERR "hfs: umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | return 0; |
| 249 | } |
| 250 | hsb->s_file_umask = (umode_t)tmp; |
| 251 | hsb->s_dir_umask = (umode_t)tmp; |
| 252 | break; |
| 253 | case opt_file_umask: |
| 254 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 255 | printk(KERN_ERR "hfs: file_umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | return 0; |
| 257 | } |
| 258 | hsb->s_file_umask = (umode_t)tmp; |
| 259 | break; |
| 260 | case opt_dir_umask: |
| 261 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 262 | printk(KERN_ERR "hfs: dir_umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | return 0; |
| 264 | } |
| 265 | hsb->s_dir_umask = (umode_t)tmp; |
| 266 | break; |
| 267 | case opt_part: |
| 268 | if (match_int(&args[0], &hsb->part)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 269 | printk(KERN_ERR "hfs: part requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | return 0; |
| 271 | } |
| 272 | break; |
| 273 | case opt_session: |
| 274 | if (match_int(&args[0], &hsb->session)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 275 | printk(KERN_ERR "hfs: session requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | return 0; |
| 277 | } |
| 278 | break; |
| 279 | case opt_type: |
| 280 | if (match_fourchar(&args[0], &hsb->s_type)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 281 | printk(KERN_ERR "hfs: type requires a 4 character value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | return 0; |
| 283 | } |
| 284 | break; |
| 285 | case opt_creator: |
| 286 | if (match_fourchar(&args[0], &hsb->s_creator)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 287 | printk(KERN_ERR "hfs: creator requires a 4 character value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return 0; |
| 289 | } |
| 290 | break; |
| 291 | case opt_quiet: |
| 292 | hsb->s_quiet = 1; |
| 293 | break; |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 294 | case opt_codepage: |
| 295 | if (hsb->nls_disk) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 296 | printk(KERN_ERR "hfs: unable to change codepage\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 297 | return 0; |
| 298 | } |
| 299 | p = match_strdup(&args[0]); |
| 300 | hsb->nls_disk = load_nls(p); |
| 301 | if (!hsb->nls_disk) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 302 | printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 303 | kfree(p); |
| 304 | return 0; |
| 305 | } |
| 306 | kfree(p); |
| 307 | break; |
| 308 | case opt_iocharset: |
| 309 | if (hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 310 | printk(KERN_ERR "hfs: unable to change iocharset\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 311 | return 0; |
| 312 | } |
| 313 | p = match_strdup(&args[0]); |
| 314 | hsb->nls_io = load_nls(p); |
| 315 | if (!hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 316 | printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 317 | kfree(p); |
| 318 | return 0; |
| 319 | } |
| 320 | kfree(p); |
| 321 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | default: |
| 323 | return 0; |
| 324 | } |
| 325 | } |
| 326 | |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 327 | if (hsb->nls_disk && !hsb->nls_io) { |
| 328 | hsb->nls_io = load_nls_default(); |
| 329 | if (!hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 330 | printk(KERN_ERR "hfs: unable to load default iocharset\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 331 | return 0; |
| 332 | } |
| 333 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | hsb->s_dir_umask &= 0777; |
| 335 | hsb->s_file_umask &= 0577; |
| 336 | |
| 337 | return 1; |
| 338 | } |
| 339 | |
| 340 | /* |
| 341 | * hfs_read_super() |
| 342 | * |
| 343 | * This is the function that is responsible for mounting an HFS |
| 344 | * filesystem. It performs all the tasks necessary to get enough data |
| 345 | * from the disk to read the root inode. This includes parsing the |
| 346 | * mount options, dealing with Macintosh partitions, reading the |
| 347 | * superblock and the allocation bitmap blocks, calling |
| 348 | * hfs_btree_init() to get the necessary data about the extents and |
| 349 | * catalog B-trees and, finally, reading the root inode into memory. |
| 350 | */ |
| 351 | static int hfs_fill_super(struct super_block *sb, void *data, int silent) |
| 352 | { |
| 353 | struct hfs_sb_info *sbi; |
| 354 | struct hfs_find_data fd; |
| 355 | hfs_cat_rec rec; |
| 356 | struct inode *root_inode; |
| 357 | int res; |
| 358 | |
Panagiotis Issaris | f8314dc | 2006-09-27 01:49:37 -0700 | [diff] [blame] | 359 | sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | if (!sbi) |
| 361 | return -ENOMEM; |
| 362 | sb->s_fs_info = sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | INIT_HLIST_HEAD(&sbi->rsrc_inodes); |
| 364 | |
| 365 | res = -EINVAL; |
| 366 | if (!parse_options((char *)data, sbi)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 367 | printk(KERN_ERR "hfs: unable to parse mount options.\n"); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 368 | goto bail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | sb->s_op = &hfs_super_operations; |
| 372 | sb->s_flags |= MS_NODIRATIME; |
| 373 | init_MUTEX(&sbi->bitmap_lock); |
| 374 | |
| 375 | res = hfs_mdb_get(sb); |
| 376 | if (res) { |
| 377 | if (!silent) |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 378 | printk(KERN_WARNING "hfs: can't find a HFS filesystem on dev %s.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | hfs_mdb_name(sb)); |
| 380 | res = -EINVAL; |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 381 | goto bail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | /* try to get the root inode */ |
| 385 | hfs_find_init(HFS_SB(sb)->cat_tree, &fd); |
| 386 | res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd); |
| 387 | if (!res) |
| 388 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength); |
| 389 | if (res) { |
| 390 | hfs_find_exit(&fd); |
| 391 | goto bail_no_root; |
| 392 | } |
Eric Sandeen | d6ddf55 | 2006-11-16 01:19:22 -0800 | [diff] [blame] | 393 | res = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | root_inode = hfs_iget(sb, &fd.search_key->cat, &rec); |
| 395 | hfs_find_exit(&fd); |
| 396 | if (!root_inode) |
| 397 | goto bail_no_root; |
| 398 | |
Eric Sandeen | d6ddf55 | 2006-11-16 01:19:22 -0800 | [diff] [blame] | 399 | res = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | sb->s_root = d_alloc_root(root_inode); |
| 401 | if (!sb->s_root) |
| 402 | goto bail_iput; |
| 403 | |
| 404 | sb->s_root->d_op = &hfs_dentry_operations; |
| 405 | |
| 406 | /* everything's okay */ |
| 407 | return 0; |
| 408 | |
| 409 | bail_iput: |
| 410 | iput(root_inode); |
| 411 | bail_no_root: |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 412 | printk(KERN_ERR "hfs: get root inode failed.\n"); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 413 | bail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | hfs_mdb_put(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | return res; |
| 416 | } |
| 417 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 418 | static int hfs_get_sb(struct file_system_type *fs_type, |
| 419 | int flags, const char *dev_name, void *data, |
| 420 | struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 422 | return get_sb_bdev(fs_type, flags, dev_name, data, hfs_fill_super, mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | static struct file_system_type hfs_fs_type = { |
| 426 | .owner = THIS_MODULE, |
| 427 | .name = "hfs", |
| 428 | .get_sb = hfs_get_sb, |
| 429 | .kill_sb = kill_block_super, |
| 430 | .fs_flags = FS_REQUIRES_DEV, |
| 431 | }; |
| 432 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 433 | static void hfs_init_once(void *p, struct kmem_cache *cachep, unsigned long flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | { |
| 435 | struct hfs_inode_info *i = p; |
| 436 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 437 | inode_init_once(&i->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | static int __init init_hfs_fs(void) |
| 441 | { |
| 442 | int err; |
| 443 | |
| 444 | hfs_inode_cachep = kmem_cache_create("hfs_inode_cache", |
| 445 | sizeof(struct hfs_inode_info), 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 446 | hfs_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | if (!hfs_inode_cachep) |
| 448 | return -ENOMEM; |
| 449 | err = register_filesystem(&hfs_fs_type); |
| 450 | if (err) |
| 451 | kmem_cache_destroy(hfs_inode_cachep); |
| 452 | return err; |
| 453 | } |
| 454 | |
| 455 | static void __exit exit_hfs_fs(void) |
| 456 | { |
| 457 | unregister_filesystem(&hfs_fs_type); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 458 | kmem_cache_destroy(hfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | module_init(init_hfs_fs) |
| 462 | module_exit(exit_hfs_fs) |