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 |
Robert P. J. Day | 14b30d6 | 2008-02-06 01:37:10 -0800 | [diff] [blame] | 9 | * init_hfs_fs() and exit_hfs_fs(). The remaining super_ops are in |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame^] | 68 | lock_kernel(); |
| 69 | |
Christoph Hellwig | 8c85e12 | 2009-04-28 18:00:26 +0200 | [diff] [blame] | 70 | if (sb->s_dirt) |
| 71 | hfs_write_super(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | hfs_mdb_close(sb); |
| 73 | /* release the MDB's resources */ |
| 74 | hfs_mdb_put(sb); |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame^] | 75 | |
| 76 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | /* |
| 80 | * hfs_statfs() |
| 81 | * |
| 82 | * This is the statfs() entry in the super_operations structure for |
| 83 | * HFS filesystems. The purpose is to return various data about the |
| 84 | * filesystem. |
| 85 | * |
| 86 | * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks. |
| 87 | */ |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 88 | static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 90 | struct super_block *sb = dentry->d_sb; |
Coly Li | 7dd2c00 | 2009-04-02 16:59:35 -0700 | [diff] [blame] | 91 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | buf->f_type = HFS_SUPER_MAGIC; |
| 94 | buf->f_bsize = sb->s_blocksize; |
| 95 | buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div; |
| 96 | buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div; |
| 97 | buf->f_bavail = buf->f_bfree; |
| 98 | buf->f_files = HFS_SB(sb)->fs_ablocks; |
| 99 | buf->f_ffree = HFS_SB(sb)->free_ablocks; |
Coly Li | 7dd2c00 | 2009-04-02 16:59:35 -0700 | [diff] [blame] | 100 | buf->f_fsid.val[0] = (u32)id; |
| 101 | buf->f_fsid.val[1] = (u32)(id >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | buf->f_namelen = HFS_NAMELEN; |
| 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | static int hfs_remount(struct super_block *sb, int *flags, char *data) |
| 108 | { |
| 109 | *flags |= MS_NODIRATIME; |
| 110 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
| 111 | return 0; |
| 112 | if (!(*flags & MS_RDONLY)) { |
| 113 | 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] | 114 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | "running fsck.hfs is recommended. leaving read-only.\n"); |
| 116 | sb->s_flags |= MS_RDONLY; |
| 117 | *flags |= MS_RDONLY; |
| 118 | } 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] | 119 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | sb->s_flags |= MS_RDONLY; |
| 121 | *flags |= MS_RDONLY; |
| 122 | } |
| 123 | } |
| 124 | return 0; |
| 125 | } |
| 126 | |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 127 | static int hfs_show_options(struct seq_file *seq, struct vfsmount *mnt) |
| 128 | { |
| 129 | struct hfs_sb_info *sbi = HFS_SB(mnt->mnt_sb); |
| 130 | |
| 131 | if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f)) |
| 132 | seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator); |
| 133 | if (sbi->s_type != cpu_to_be32(0x3f3f3f3f)) |
| 134 | seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type); |
| 135 | seq_printf(seq, ",uid=%u,gid=%u", sbi->s_uid, sbi->s_gid); |
| 136 | if (sbi->s_file_umask != 0133) |
| 137 | seq_printf(seq, ",file_umask=%o", sbi->s_file_umask); |
| 138 | if (sbi->s_dir_umask != 0022) |
| 139 | seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask); |
| 140 | if (sbi->part >= 0) |
| 141 | seq_printf(seq, ",part=%u", sbi->part); |
| 142 | if (sbi->session >= 0) |
| 143 | seq_printf(seq, ",session=%u", sbi->session); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 144 | if (sbi->nls_disk) |
| 145 | seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset); |
| 146 | if (sbi->nls_io) |
| 147 | seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset); |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 148 | if (sbi->s_quiet) |
| 149 | seq_printf(seq, ",quiet"); |
| 150 | return 0; |
| 151 | } |
| 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | static struct inode *hfs_alloc_inode(struct super_block *sb) |
| 154 | { |
| 155 | struct hfs_inode_info *i; |
| 156 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 157 | i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | return i ? &i->vfs_inode : NULL; |
| 159 | } |
| 160 | |
| 161 | static void hfs_destroy_inode(struct inode *inode) |
| 162 | { |
| 163 | kmem_cache_free(hfs_inode_cachep, HFS_I(inode)); |
| 164 | } |
| 165 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 166 | static const struct super_operations hfs_super_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | .alloc_inode = hfs_alloc_inode, |
| 168 | .destroy_inode = hfs_destroy_inode, |
| 169 | .write_inode = hfs_write_inode, |
| 170 | .clear_inode = hfs_clear_inode, |
| 171 | .put_super = hfs_put_super, |
| 172 | .write_super = hfs_write_super, |
| 173 | .statfs = hfs_statfs, |
| 174 | .remount_fs = hfs_remount, |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 175 | .show_options = hfs_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | }; |
| 177 | |
| 178 | enum { |
| 179 | opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask, |
| 180 | opt_part, opt_session, opt_type, opt_creator, opt_quiet, |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 181 | opt_codepage, opt_iocharset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | opt_err |
| 183 | }; |
| 184 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 185 | static const match_table_t tokens = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | { opt_uid, "uid=%u" }, |
| 187 | { opt_gid, "gid=%u" }, |
| 188 | { opt_umask, "umask=%o" }, |
| 189 | { opt_file_umask, "file_umask=%o" }, |
| 190 | { opt_dir_umask, "dir_umask=%o" }, |
| 191 | { opt_part, "part=%u" }, |
| 192 | { opt_session, "session=%u" }, |
| 193 | { opt_type, "type=%s" }, |
| 194 | { opt_creator, "creator=%s" }, |
| 195 | { opt_quiet, "quiet" }, |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 196 | { opt_codepage, "codepage=%s" }, |
| 197 | { opt_iocharset, "iocharset=%s" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | { opt_err, NULL } |
| 199 | }; |
| 200 | |
| 201 | static inline int match_fourchar(substring_t *arg, u32 *result) |
| 202 | { |
| 203 | if (arg->to - arg->from != 4) |
| 204 | return -EINVAL; |
| 205 | memcpy(result, arg->from, 4); |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * parse_options() |
| 211 | * |
| 212 | * adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger |
| 213 | * This function is called by hfs_read_super() to parse the mount options. |
| 214 | */ |
| 215 | static int parse_options(char *options, struct hfs_sb_info *hsb) |
| 216 | { |
| 217 | char *p; |
| 218 | substring_t args[MAX_OPT_ARGS]; |
| 219 | int tmp, token; |
| 220 | |
| 221 | /* initialize the sb with defaults */ |
David Howells | 94c9a5e | 2008-11-14 10:38:54 +1100 | [diff] [blame] | 222 | hsb->s_uid = current_uid(); |
| 223 | hsb->s_gid = current_gid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | hsb->s_file_umask = 0133; |
| 225 | hsb->s_dir_umask = 0022; |
| 226 | hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */ |
| 227 | hsb->s_quiet = 0; |
| 228 | hsb->part = -1; |
| 229 | hsb->session = -1; |
| 230 | |
| 231 | if (!options) |
| 232 | return 1; |
| 233 | |
| 234 | while ((p = strsep(&options, ",")) != NULL) { |
| 235 | if (!*p) |
| 236 | continue; |
| 237 | |
| 238 | token = match_token(p, tokens, args); |
| 239 | switch (token) { |
| 240 | case opt_uid: |
| 241 | if (match_int(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 242 | printk(KERN_ERR "hfs: uid requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | return 0; |
| 244 | } |
| 245 | hsb->s_uid = (uid_t)tmp; |
| 246 | break; |
| 247 | case opt_gid: |
| 248 | if (match_int(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 249 | printk(KERN_ERR "hfs: gid requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | return 0; |
| 251 | } |
| 252 | hsb->s_gid = (gid_t)tmp; |
| 253 | break; |
| 254 | case opt_umask: |
| 255 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 256 | printk(KERN_ERR "hfs: umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | return 0; |
| 258 | } |
| 259 | hsb->s_file_umask = (umode_t)tmp; |
| 260 | hsb->s_dir_umask = (umode_t)tmp; |
| 261 | break; |
| 262 | case opt_file_umask: |
| 263 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 264 | printk(KERN_ERR "hfs: file_umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | return 0; |
| 266 | } |
| 267 | hsb->s_file_umask = (umode_t)tmp; |
| 268 | break; |
| 269 | case opt_dir_umask: |
| 270 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 271 | printk(KERN_ERR "hfs: dir_umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | return 0; |
| 273 | } |
| 274 | hsb->s_dir_umask = (umode_t)tmp; |
| 275 | break; |
| 276 | case opt_part: |
| 277 | if (match_int(&args[0], &hsb->part)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 278 | printk(KERN_ERR "hfs: part requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | return 0; |
| 280 | } |
| 281 | break; |
| 282 | case opt_session: |
| 283 | if (match_int(&args[0], &hsb->session)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 284 | printk(KERN_ERR "hfs: session requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | return 0; |
| 286 | } |
| 287 | break; |
| 288 | case opt_type: |
| 289 | if (match_fourchar(&args[0], &hsb->s_type)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 290 | printk(KERN_ERR "hfs: type requires a 4 character value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | return 0; |
| 292 | } |
| 293 | break; |
| 294 | case opt_creator: |
| 295 | if (match_fourchar(&args[0], &hsb->s_creator)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 296 | printk(KERN_ERR "hfs: creator requires a 4 character value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | return 0; |
| 298 | } |
| 299 | break; |
| 300 | case opt_quiet: |
| 301 | hsb->s_quiet = 1; |
| 302 | break; |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 303 | case opt_codepage: |
| 304 | if (hsb->nls_disk) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 305 | printk(KERN_ERR "hfs: unable to change codepage\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 306 | return 0; |
| 307 | } |
| 308 | p = match_strdup(&args[0]); |
Jim Meyering | 3fbe5c3 | 2008-04-29 00:59:07 -0700 | [diff] [blame] | 309 | if (p) |
| 310 | hsb->nls_disk = load_nls(p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 311 | if (!hsb->nls_disk) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 312 | printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 313 | kfree(p); |
| 314 | return 0; |
| 315 | } |
| 316 | kfree(p); |
| 317 | break; |
| 318 | case opt_iocharset: |
| 319 | if (hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 320 | printk(KERN_ERR "hfs: unable to change iocharset\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 321 | return 0; |
| 322 | } |
| 323 | p = match_strdup(&args[0]); |
Jim Meyering | 3fbe5c3 | 2008-04-29 00:59:07 -0700 | [diff] [blame] | 324 | if (p) |
| 325 | hsb->nls_io = load_nls(p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 326 | if (!hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 327 | printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 328 | kfree(p); |
| 329 | return 0; |
| 330 | } |
| 331 | kfree(p); |
| 332 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | default: |
| 334 | return 0; |
| 335 | } |
| 336 | } |
| 337 | |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 338 | if (hsb->nls_disk && !hsb->nls_io) { |
| 339 | hsb->nls_io = load_nls_default(); |
| 340 | if (!hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 341 | printk(KERN_ERR "hfs: unable to load default iocharset\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 342 | return 0; |
| 343 | } |
| 344 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | hsb->s_dir_umask &= 0777; |
| 346 | hsb->s_file_umask &= 0577; |
| 347 | |
| 348 | return 1; |
| 349 | } |
| 350 | |
| 351 | /* |
| 352 | * hfs_read_super() |
| 353 | * |
| 354 | * This is the function that is responsible for mounting an HFS |
| 355 | * filesystem. It performs all the tasks necessary to get enough data |
| 356 | * from the disk to read the root inode. This includes parsing the |
| 357 | * mount options, dealing with Macintosh partitions, reading the |
| 358 | * superblock and the allocation bitmap blocks, calling |
| 359 | * hfs_btree_init() to get the necessary data about the extents and |
| 360 | * catalog B-trees and, finally, reading the root inode into memory. |
| 361 | */ |
| 362 | static int hfs_fill_super(struct super_block *sb, void *data, int silent) |
| 363 | { |
| 364 | struct hfs_sb_info *sbi; |
| 365 | struct hfs_find_data fd; |
| 366 | hfs_cat_rec rec; |
| 367 | struct inode *root_inode; |
| 368 | int res; |
| 369 | |
Panagiotis Issaris | f8314dc | 2006-09-27 01:49:37 -0700 | [diff] [blame] | 370 | sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | if (!sbi) |
| 372 | return -ENOMEM; |
| 373 | sb->s_fs_info = sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | INIT_HLIST_HEAD(&sbi->rsrc_inodes); |
| 375 | |
| 376 | res = -EINVAL; |
| 377 | if (!parse_options((char *)data, sbi)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 378 | printk(KERN_ERR "hfs: unable to parse mount options.\n"); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 379 | goto bail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | sb->s_op = &hfs_super_operations; |
| 383 | sb->s_flags |= MS_NODIRATIME; |
Matthias Kaehlcke | 3084b72 | 2008-07-25 01:46:34 -0700 | [diff] [blame] | 384 | mutex_init(&sbi->bitmap_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
| 386 | res = hfs_mdb_get(sb); |
| 387 | if (res) { |
| 388 | if (!silent) |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 389 | 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] | 390 | hfs_mdb_name(sb)); |
| 391 | res = -EINVAL; |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 392 | goto bail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | /* try to get the root inode */ |
| 396 | hfs_find_init(HFS_SB(sb)->cat_tree, &fd); |
| 397 | res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd); |
| 398 | if (!res) |
| 399 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength); |
| 400 | if (res) { |
| 401 | hfs_find_exit(&fd); |
| 402 | goto bail_no_root; |
| 403 | } |
Eric Sandeen | d6ddf55 | 2006-11-16 01:19:22 -0800 | [diff] [blame] | 404 | res = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | root_inode = hfs_iget(sb, &fd.search_key->cat, &rec); |
| 406 | hfs_find_exit(&fd); |
| 407 | if (!root_inode) |
| 408 | goto bail_no_root; |
| 409 | |
Eric Sandeen | d6ddf55 | 2006-11-16 01:19:22 -0800 | [diff] [blame] | 410 | res = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | sb->s_root = d_alloc_root(root_inode); |
| 412 | if (!sb->s_root) |
| 413 | goto bail_iput; |
| 414 | |
| 415 | sb->s_root->d_op = &hfs_dentry_operations; |
| 416 | |
| 417 | /* everything's okay */ |
| 418 | return 0; |
| 419 | |
| 420 | bail_iput: |
| 421 | iput(root_inode); |
| 422 | bail_no_root: |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 423 | printk(KERN_ERR "hfs: get root inode failed.\n"); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 424 | bail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | hfs_mdb_put(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | return res; |
| 427 | } |
| 428 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 429 | static int hfs_get_sb(struct file_system_type *fs_type, |
| 430 | int flags, const char *dev_name, void *data, |
| 431 | struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 433 | 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] | 434 | } |
| 435 | |
| 436 | static struct file_system_type hfs_fs_type = { |
| 437 | .owner = THIS_MODULE, |
| 438 | .name = "hfs", |
| 439 | .get_sb = hfs_get_sb, |
| 440 | .kill_sb = kill_block_super, |
| 441 | .fs_flags = FS_REQUIRES_DEV, |
| 442 | }; |
| 443 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 444 | static void hfs_init_once(void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | { |
| 446 | struct hfs_inode_info *i = p; |
| 447 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 448 | inode_init_once(&i->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | static int __init init_hfs_fs(void) |
| 452 | { |
| 453 | int err; |
| 454 | |
| 455 | hfs_inode_cachep = kmem_cache_create("hfs_inode_cache", |
| 456 | sizeof(struct hfs_inode_info), 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 457 | hfs_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | if (!hfs_inode_cachep) |
| 459 | return -ENOMEM; |
| 460 | err = register_filesystem(&hfs_fs_type); |
| 461 | if (err) |
| 462 | kmem_cache_destroy(hfs_inode_cachep); |
| 463 | return err; |
| 464 | } |
| 465 | |
| 466 | static void __exit exit_hfs_fs(void) |
| 467 | { |
| 468 | unregister_filesystem(&hfs_fs_type); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 469 | kmem_cache_destroy(hfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | module_init(init_hfs_fs) |
| 473 | module_exit(exit_hfs_fs) |