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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/vfs.h> |
| 24 | |
| 25 | #include "hfs_fs.h" |
| 26 | #include "btree.h" |
| 27 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 28 | static struct kmem_cache *hfs_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | MODULE_LICENSE("GPL"); |
| 31 | |
Christoph Hellwig | 58bc5bb | 2009-06-08 10:04:54 +0200 | [diff] [blame] | 32 | static int hfs_sync_fs(struct super_block *sb, int wait) |
| 33 | { |
Christoph Hellwig | 58bc5bb | 2009-06-08 10:04:54 +0200 | [diff] [blame] | 34 | hfs_mdb_commit(sb); |
Christoph Hellwig | 58bc5bb | 2009-06-08 10:04:54 +0200 | [diff] [blame] | 35 | return 0; |
| 36 | } |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | /* |
| 39 | * hfs_put_super() |
| 40 | * |
| 41 | * This is the put_super() entry in the super_operations structure for |
| 42 | * HFS filesystems. The purpose is to release the resources |
| 43 | * associated with the superblock sb. |
| 44 | */ |
| 45 | static void hfs_put_super(struct super_block *sb) |
| 46 | { |
Artem Bityutskiy | 5687b57 | 2012-07-12 17:28:49 +0300 | [diff] [blame] | 47 | cancel_delayed_work_sync(&HFS_SB(sb)->mdb_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | hfs_mdb_close(sb); |
| 49 | /* release the MDB's resources */ |
| 50 | hfs_mdb_put(sb); |
| 51 | } |
| 52 | |
Artem Bityutskiy | 5687b57 | 2012-07-12 17:28:49 +0300 | [diff] [blame] | 53 | static void flush_mdb(struct work_struct *work) |
| 54 | { |
| 55 | struct hfs_sb_info *sbi; |
| 56 | struct super_block *sb; |
| 57 | |
| 58 | sbi = container_of(work, struct hfs_sb_info, mdb_work.work); |
| 59 | sb = sbi->sb; |
| 60 | |
| 61 | spin_lock(&sbi->work_lock); |
| 62 | sbi->work_queued = 0; |
| 63 | spin_unlock(&sbi->work_lock); |
| 64 | |
| 65 | hfs_mdb_commit(sb); |
| 66 | } |
| 67 | |
| 68 | void hfs_mark_mdb_dirty(struct super_block *sb) |
| 69 | { |
| 70 | struct hfs_sb_info *sbi = HFS_SB(sb); |
| 71 | unsigned long delay; |
| 72 | |
| 73 | if (sb->s_flags & MS_RDONLY) |
| 74 | return; |
| 75 | |
| 76 | spin_lock(&sbi->work_lock); |
| 77 | if (!sbi->work_queued) { |
| 78 | delay = msecs_to_jiffies(dirty_writeback_interval * 10); |
| 79 | queue_delayed_work(system_long_wq, &sbi->mdb_work, delay); |
| 80 | sbi->work_queued = 1; |
| 81 | } |
| 82 | spin_unlock(&sbi->work_lock); |
| 83 | } |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | /* |
| 86 | * hfs_statfs() |
| 87 | * |
| 88 | * This is the statfs() entry in the super_operations structure for |
| 89 | * HFS filesystems. The purpose is to return various data about the |
| 90 | * filesystem. |
| 91 | * |
| 92 | * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks. |
| 93 | */ |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 94 | static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 96 | struct super_block *sb = dentry->d_sb; |
Coly Li | 7dd2c00 | 2009-04-02 16:59:35 -0700 | [diff] [blame] | 97 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | buf->f_type = HFS_SUPER_MAGIC; |
| 100 | buf->f_bsize = sb->s_blocksize; |
| 101 | buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div; |
| 102 | buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div; |
| 103 | buf->f_bavail = buf->f_bfree; |
| 104 | buf->f_files = HFS_SB(sb)->fs_ablocks; |
| 105 | buf->f_ffree = HFS_SB(sb)->free_ablocks; |
Coly Li | 7dd2c00 | 2009-04-02 16:59:35 -0700 | [diff] [blame] | 106 | buf->f_fsid.val[0] = (u32)id; |
| 107 | buf->f_fsid.val[1] = (u32)(id >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | buf->f_namelen = HFS_NAMELEN; |
| 109 | |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | static int hfs_remount(struct super_block *sb, int *flags, char *data) |
| 114 | { |
| 115 | *flags |= MS_NODIRATIME; |
| 116 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
| 117 | return 0; |
| 118 | if (!(*flags & MS_RDONLY)) { |
| 119 | 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] | 120 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | "running fsck.hfs is recommended. leaving read-only.\n"); |
| 122 | sb->s_flags |= MS_RDONLY; |
| 123 | *flags |= MS_RDONLY; |
| 124 | } 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] | 125 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | sb->s_flags |= MS_RDONLY; |
| 127 | *flags |= MS_RDONLY; |
| 128 | } |
| 129 | } |
| 130 | return 0; |
| 131 | } |
| 132 | |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 133 | static int hfs_show_options(struct seq_file *seq, struct dentry *root) |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 134 | { |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 135 | struct hfs_sb_info *sbi = HFS_SB(root->d_sb); |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 136 | |
| 137 | if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f)) |
| 138 | seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator); |
| 139 | if (sbi->s_type != cpu_to_be32(0x3f3f3f3f)) |
| 140 | seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type); |
| 141 | seq_printf(seq, ",uid=%u,gid=%u", sbi->s_uid, sbi->s_gid); |
| 142 | if (sbi->s_file_umask != 0133) |
| 143 | seq_printf(seq, ",file_umask=%o", sbi->s_file_umask); |
| 144 | if (sbi->s_dir_umask != 0022) |
| 145 | seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask); |
| 146 | if (sbi->part >= 0) |
| 147 | seq_printf(seq, ",part=%u", sbi->part); |
| 148 | if (sbi->session >= 0) |
| 149 | seq_printf(seq, ",session=%u", sbi->session); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 150 | if (sbi->nls_disk) |
| 151 | seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset); |
| 152 | if (sbi->nls_io) |
| 153 | seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset); |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 154 | if (sbi->s_quiet) |
| 155 | seq_printf(seq, ",quiet"); |
| 156 | return 0; |
| 157 | } |
| 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | static struct inode *hfs_alloc_inode(struct super_block *sb) |
| 160 | { |
| 161 | struct hfs_inode_info *i; |
| 162 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 163 | i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | return i ? &i->vfs_inode : NULL; |
| 165 | } |
| 166 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 167 | static void hfs_i_callback(struct rcu_head *head) |
| 168 | { |
| 169 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 170 | kmem_cache_free(hfs_inode_cachep, HFS_I(inode)); |
| 171 | } |
| 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | static void hfs_destroy_inode(struct inode *inode) |
| 174 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 175 | call_rcu(&inode->i_rcu, hfs_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | } |
| 177 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 178 | static const struct super_operations hfs_super_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | .alloc_inode = hfs_alloc_inode, |
| 180 | .destroy_inode = hfs_destroy_inode, |
| 181 | .write_inode = hfs_write_inode, |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 182 | .evict_inode = hfs_evict_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | .put_super = hfs_put_super, |
Christoph Hellwig | 58bc5bb | 2009-06-08 10:04:54 +0200 | [diff] [blame] | 184 | .sync_fs = hfs_sync_fs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | .statfs = hfs_statfs, |
| 186 | .remount_fs = hfs_remount, |
Roman Zippel | 717dd80e | 2005-09-06 15:18:48 -0700 | [diff] [blame] | 187 | .show_options = hfs_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | }; |
| 189 | |
| 190 | enum { |
| 191 | opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask, |
| 192 | opt_part, opt_session, opt_type, opt_creator, opt_quiet, |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 193 | opt_codepage, opt_iocharset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | opt_err |
| 195 | }; |
| 196 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 197 | static const match_table_t tokens = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | { opt_uid, "uid=%u" }, |
| 199 | { opt_gid, "gid=%u" }, |
| 200 | { opt_umask, "umask=%o" }, |
| 201 | { opt_file_umask, "file_umask=%o" }, |
| 202 | { opt_dir_umask, "dir_umask=%o" }, |
| 203 | { opt_part, "part=%u" }, |
| 204 | { opt_session, "session=%u" }, |
| 205 | { opt_type, "type=%s" }, |
| 206 | { opt_creator, "creator=%s" }, |
| 207 | { opt_quiet, "quiet" }, |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 208 | { opt_codepage, "codepage=%s" }, |
| 209 | { opt_iocharset, "iocharset=%s" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | { opt_err, NULL } |
| 211 | }; |
| 212 | |
| 213 | static inline int match_fourchar(substring_t *arg, u32 *result) |
| 214 | { |
| 215 | if (arg->to - arg->from != 4) |
| 216 | return -EINVAL; |
| 217 | memcpy(result, arg->from, 4); |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * parse_options() |
| 223 | * |
| 224 | * adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger |
| 225 | * This function is called by hfs_read_super() to parse the mount options. |
| 226 | */ |
| 227 | static int parse_options(char *options, struct hfs_sb_info *hsb) |
| 228 | { |
| 229 | char *p; |
| 230 | substring_t args[MAX_OPT_ARGS]; |
| 231 | int tmp, token; |
| 232 | |
| 233 | /* initialize the sb with defaults */ |
David Howells | 94c9a5e | 2008-11-14 10:38:54 +1100 | [diff] [blame] | 234 | hsb->s_uid = current_uid(); |
| 235 | hsb->s_gid = current_gid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | hsb->s_file_umask = 0133; |
| 237 | hsb->s_dir_umask = 0022; |
| 238 | hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */ |
| 239 | hsb->s_quiet = 0; |
| 240 | hsb->part = -1; |
| 241 | hsb->session = -1; |
| 242 | |
| 243 | if (!options) |
| 244 | return 1; |
| 245 | |
| 246 | while ((p = strsep(&options, ",")) != NULL) { |
| 247 | if (!*p) |
| 248 | continue; |
| 249 | |
| 250 | token = match_token(p, tokens, args); |
| 251 | switch (token) { |
| 252 | case opt_uid: |
| 253 | if (match_int(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 254 | printk(KERN_ERR "hfs: uid requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | return 0; |
| 256 | } |
| 257 | hsb->s_uid = (uid_t)tmp; |
| 258 | break; |
| 259 | case opt_gid: |
| 260 | if (match_int(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 261 | printk(KERN_ERR "hfs: gid requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | return 0; |
| 263 | } |
| 264 | hsb->s_gid = (gid_t)tmp; |
| 265 | break; |
| 266 | case opt_umask: |
| 267 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 268 | printk(KERN_ERR "hfs: umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return 0; |
| 270 | } |
| 271 | hsb->s_file_umask = (umode_t)tmp; |
| 272 | hsb->s_dir_umask = (umode_t)tmp; |
| 273 | break; |
| 274 | case opt_file_umask: |
| 275 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 276 | printk(KERN_ERR "hfs: file_umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | return 0; |
| 278 | } |
| 279 | hsb->s_file_umask = (umode_t)tmp; |
| 280 | break; |
| 281 | case opt_dir_umask: |
| 282 | if (match_octal(&args[0], &tmp)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 283 | printk(KERN_ERR "hfs: dir_umask requires a value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | return 0; |
| 285 | } |
| 286 | hsb->s_dir_umask = (umode_t)tmp; |
| 287 | break; |
| 288 | case opt_part: |
| 289 | if (match_int(&args[0], &hsb->part)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 290 | printk(KERN_ERR "hfs: part requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | return 0; |
| 292 | } |
| 293 | break; |
| 294 | case opt_session: |
| 295 | if (match_int(&args[0], &hsb->session)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 296 | printk(KERN_ERR "hfs: session requires an argument\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | return 0; |
| 298 | } |
| 299 | break; |
| 300 | case opt_type: |
| 301 | if (match_fourchar(&args[0], &hsb->s_type)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 302 | printk(KERN_ERR "hfs: type requires a 4 character value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | return 0; |
| 304 | } |
| 305 | break; |
| 306 | case opt_creator: |
| 307 | if (match_fourchar(&args[0], &hsb->s_creator)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 308 | printk(KERN_ERR "hfs: creator requires a 4 character value\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | return 0; |
| 310 | } |
| 311 | break; |
| 312 | case opt_quiet: |
| 313 | hsb->s_quiet = 1; |
| 314 | break; |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 315 | case opt_codepage: |
| 316 | if (hsb->nls_disk) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 317 | printk(KERN_ERR "hfs: unable to change codepage\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 318 | return 0; |
| 319 | } |
| 320 | p = match_strdup(&args[0]); |
Jim Meyering | 3fbe5c3 | 2008-04-29 00:59:07 -0700 | [diff] [blame] | 321 | if (p) |
| 322 | hsb->nls_disk = load_nls(p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 323 | if (!hsb->nls_disk) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 324 | printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 325 | kfree(p); |
| 326 | return 0; |
| 327 | } |
| 328 | kfree(p); |
| 329 | break; |
| 330 | case opt_iocharset: |
| 331 | if (hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 332 | printk(KERN_ERR "hfs: unable to change iocharset\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 333 | return 0; |
| 334 | } |
| 335 | p = match_strdup(&args[0]); |
Jim Meyering | 3fbe5c3 | 2008-04-29 00:59:07 -0700 | [diff] [blame] | 336 | if (p) |
| 337 | hsb->nls_io = load_nls(p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 338 | if (!hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 339 | printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 340 | kfree(p); |
| 341 | return 0; |
| 342 | } |
| 343 | kfree(p); |
| 344 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | default: |
| 346 | return 0; |
| 347 | } |
| 348 | } |
| 349 | |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 350 | if (hsb->nls_disk && !hsb->nls_io) { |
| 351 | hsb->nls_io = load_nls_default(); |
| 352 | if (!hsb->nls_io) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 353 | printk(KERN_ERR "hfs: unable to load default iocharset\n"); |
Roman Zippel | 328b922 | 2005-09-06 15:18:49 -0700 | [diff] [blame] | 354 | return 0; |
| 355 | } |
| 356 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | hsb->s_dir_umask &= 0777; |
| 358 | hsb->s_file_umask &= 0577; |
| 359 | |
| 360 | return 1; |
| 361 | } |
| 362 | |
| 363 | /* |
| 364 | * hfs_read_super() |
| 365 | * |
| 366 | * This is the function that is responsible for mounting an HFS |
| 367 | * filesystem. It performs all the tasks necessary to get enough data |
| 368 | * from the disk to read the root inode. This includes parsing the |
| 369 | * mount options, dealing with Macintosh partitions, reading the |
| 370 | * superblock and the allocation bitmap blocks, calling |
| 371 | * hfs_btree_init() to get the necessary data about the extents and |
| 372 | * catalog B-trees and, finally, reading the root inode into memory. |
| 373 | */ |
| 374 | static int hfs_fill_super(struct super_block *sb, void *data, int silent) |
| 375 | { |
| 376 | struct hfs_sb_info *sbi; |
| 377 | struct hfs_find_data fd; |
| 378 | hfs_cat_rec rec; |
| 379 | struct inode *root_inode; |
| 380 | int res; |
| 381 | |
Panagiotis Issaris | f8314dc | 2006-09-27 01:49:37 -0700 | [diff] [blame] | 382 | sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL); |
Jan Blunck | 8526fb3 | 2010-02-24 13:25:30 +0100 | [diff] [blame] | 383 | if (!sbi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | return -ENOMEM; |
Jan Blunck | 8526fb3 | 2010-02-24 13:25:30 +0100 | [diff] [blame] | 385 | |
Artem Bityutskiy | b16ca62 | 2012-07-12 17:28:48 +0300 | [diff] [blame] | 386 | sbi->sb = sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | sb->s_fs_info = sbi; |
Artem Bityutskiy | 5687b57 | 2012-07-12 17:28:49 +0300 | [diff] [blame] | 388 | spin_lock_init(&sbi->work_lock); |
| 389 | INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
| 391 | res = -EINVAL; |
| 392 | if (!parse_options((char *)data, sbi)) { |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 393 | printk(KERN_ERR "hfs: unable to parse mount options.\n"); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 394 | goto bail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | } |
| 396 | |
| 397 | sb->s_op = &hfs_super_operations; |
| 398 | sb->s_flags |= MS_NODIRATIME; |
Matthias Kaehlcke | 3084b72 | 2008-07-25 01:46:34 -0700 | [diff] [blame] | 399 | mutex_init(&sbi->bitmap_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
| 401 | res = hfs_mdb_get(sb); |
| 402 | if (res) { |
| 403 | if (!silent) |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 404 | 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] | 405 | hfs_mdb_name(sb)); |
| 406 | res = -EINVAL; |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 407 | goto bail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | /* try to get the root inode */ |
| 411 | hfs_find_init(HFS_SB(sb)->cat_tree, &fd); |
| 412 | res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd); |
Amerigo Wang | ec81aec | 2009-12-14 17:57:37 -0800 | [diff] [blame] | 413 | if (!res) { |
| 414 | if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) { |
| 415 | res = -EIO; |
| 416 | goto bail; |
| 417 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength); |
Amerigo Wang | ec81aec | 2009-12-14 17:57:37 -0800 | [diff] [blame] | 419 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | if (res) { |
| 421 | hfs_find_exit(&fd); |
| 422 | goto bail_no_root; |
| 423 | } |
Eric Sandeen | d6ddf55 | 2006-11-16 01:19:22 -0800 | [diff] [blame] | 424 | res = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | root_inode = hfs_iget(sb, &fd.search_key->cat, &rec); |
| 426 | hfs_find_exit(&fd); |
| 427 | if (!root_inode) |
| 428 | goto bail_no_root; |
| 429 | |
Al Viro | 518c79d | 2010-12-18 11:19:14 -0500 | [diff] [blame] | 430 | sb->s_d_op = &hfs_dentry_operations; |
Eric Sandeen | d6ddf55 | 2006-11-16 01:19:22 -0800 | [diff] [blame] | 431 | res = -ENOMEM; |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 432 | sb->s_root = d_make_root(root_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | if (!sb->s_root) |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 434 | goto bail_no_root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | /* everything's okay */ |
| 437 | return 0; |
| 438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | bail_no_root: |
Roman Zippel | 7cf3cc3 | 2006-01-18 17:43:07 -0800 | [diff] [blame] | 440 | printk(KERN_ERR "hfs: get root inode failed.\n"); |
Colin Leroy | 945b092 | 2005-05-01 08:59:16 -0700 | [diff] [blame] | 441 | bail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | hfs_mdb_put(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | return res; |
| 444 | } |
| 445 | |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 446 | static struct dentry *hfs_mount(struct file_system_type *fs_type, |
| 447 | int flags, const char *dev_name, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | { |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 449 | return mount_bdev(fs_type, flags, dev_name, data, hfs_fill_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
| 451 | |
| 452 | static struct file_system_type hfs_fs_type = { |
| 453 | .owner = THIS_MODULE, |
| 454 | .name = "hfs", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 455 | .mount = hfs_mount, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | .kill_sb = kill_block_super, |
| 457 | .fs_flags = FS_REQUIRES_DEV, |
| 458 | }; |
| 459 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 460 | static void hfs_init_once(void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | { |
| 462 | struct hfs_inode_info *i = p; |
| 463 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 464 | inode_init_once(&i->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | } |
| 466 | |
| 467 | static int __init init_hfs_fs(void) |
| 468 | { |
| 469 | int err; |
| 470 | |
| 471 | hfs_inode_cachep = kmem_cache_create("hfs_inode_cache", |
| 472 | sizeof(struct hfs_inode_info), 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 473 | hfs_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | if (!hfs_inode_cachep) |
| 475 | return -ENOMEM; |
| 476 | err = register_filesystem(&hfs_fs_type); |
| 477 | if (err) |
| 478 | kmem_cache_destroy(hfs_inode_cachep); |
| 479 | return err; |
| 480 | } |
| 481 | |
| 482 | static void __exit exit_hfs_fs(void) |
| 483 | { |
| 484 | unregister_filesystem(&hfs_fs_type); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 485 | kmem_cache_destroy(hfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | module_init(init_hfs_fs) |
| 489 | module_exit(exit_hfs_fs) |