Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/hpfs/super.c |
| 3 | * |
| 4 | * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 |
| 5 | * |
| 6 | * mounting, unmounting, error handling |
| 7 | */ |
| 8 | |
| 9 | #include "hpfs_fn.h" |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/parser.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/statfs.h> |
Jeff Garzik | e18fa70 | 2006-09-24 11:13:19 -0400 | [diff] [blame] | 14 | #include <linux/magic.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 15 | #include <linux/sched.h> |
Akinobu Mita | f4c54fc | 2009-12-15 16:46:56 -0800 | [diff] [blame] | 16 | #include <linux/bitmap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ |
| 20 | |
Mikulas Patocka | dab4c82 | 2011-05-08 20:44:08 +0200 | [diff] [blame] | 21 | static void mark_dirty(struct super_block *s, int remount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | { |
Mikulas Patocka | dab4c82 | 2011-05-08 20:44:08 +0200 | [diff] [blame] | 23 | if (hpfs_sb(s)->sb_chkdsk && (remount || !(s->s_flags & MS_RDONLY))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | struct buffer_head *bh; |
| 25 | struct hpfs_spare_block *sb; |
| 26 | if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { |
| 27 | sb->dirty = 1; |
| 28 | sb->old_wrote = 0; |
| 29 | mark_buffer_dirty(bh); |
Mikulas Patocka | f739768 | 2011-05-08 20:43:41 +0200 | [diff] [blame] | 30 | sync_dirty_buffer(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | brelse(bh); |
| 32 | } |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there |
| 37 | were errors) */ |
| 38 | |
| 39 | static void unmark_dirty(struct super_block *s) |
| 40 | { |
| 41 | struct buffer_head *bh; |
| 42 | struct hpfs_spare_block *sb; |
| 43 | if (s->s_flags & MS_RDONLY) return; |
Mikulas Patocka | f739768 | 2011-05-08 20:43:41 +0200 | [diff] [blame] | 44 | sync_blockdev(s->s_bdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { |
| 46 | sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; |
| 47 | sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; |
| 48 | mark_buffer_dirty(bh); |
Mikulas Patocka | f739768 | 2011-05-08 20:43:41 +0200 | [diff] [blame] | 49 | sync_dirty_buffer(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | brelse(bh); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | /* Filesystem error... */ |
Alexey Dobriyan | 352d94d | 2006-12-06 20:37:04 -0800 | [diff] [blame] | 55 | static char err_buf[1024]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Alexey Dobriyan | 352d94d | 2006-12-06 20:37:04 -0800 | [diff] [blame] | 57 | void hpfs_error(struct super_block *s, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | { |
Alexey Dobriyan | 352d94d | 2006-12-06 20:37:04 -0800 | [diff] [blame] | 59 | va_list args; |
| 60 | |
| 61 | va_start(args, fmt); |
| 62 | vsnprintf(err_buf, sizeof(err_buf), fmt, args); |
| 63 | va_end(args); |
| 64 | |
| 65 | printk("HPFS: filesystem error: %s", err_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | if (!hpfs_sb(s)->sb_was_error) { |
| 67 | if (hpfs_sb(s)->sb_err == 2) { |
| 68 | printk("; crashing the system because you wanted it\n"); |
Mikulas Patocka | dab4c82 | 2011-05-08 20:44:08 +0200 | [diff] [blame] | 69 | mark_dirty(s, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | panic("HPFS panic"); |
| 71 | } else if (hpfs_sb(s)->sb_err == 1) { |
| 72 | if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n"); |
| 73 | else { |
| 74 | printk("; remounting read-only\n"); |
Mikulas Patocka | dab4c82 | 2011-05-08 20:44:08 +0200 | [diff] [blame] | 75 | mark_dirty(s, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | s->s_flags |= MS_RDONLY; |
| 77 | } |
| 78 | } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n"); |
| 79 | else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); |
| 80 | } else printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | hpfs_sb(s)->sb_was_error = 1; |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * A little trick to detect cycles in many hpfs structures and don't let the |
| 86 | * kernel crash on corrupted filesystem. When first called, set c2 to 0. |
| 87 | * |
| 88 | * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories |
| 89 | * nested each in other, chkdsk locked up happilly. |
| 90 | */ |
| 91 | |
| 92 | int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, |
| 93 | char *msg) |
| 94 | { |
| 95 | if (*c2 && *c1 == key) { |
| 96 | hpfs_error(s, "cycle detected on key %08x in %s", key, msg); |
| 97 | return 1; |
| 98 | } |
| 99 | (*c2)++; |
| 100 | if (!((*c2 - 1) & *c2)) *c1 = key; |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | static void hpfs_put_super(struct super_block *s) |
| 105 | { |
| 106 | struct hpfs_sb_info *sbi = hpfs_sb(s); |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 107 | |
Mikulas Patocka | 7dd29d8 | 2011-05-08 20:42:54 +0200 | [diff] [blame] | 108 | hpfs_lock(s); |
| 109 | unmark_dirty(s); |
| 110 | hpfs_unlock(s); |
| 111 | |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 112 | kfree(sbi->sb_cp_table); |
| 113 | kfree(sbi->sb_bmp_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | s->s_fs_info = NULL; |
| 115 | kfree(sbi); |
| 116 | } |
| 117 | |
| 118 | unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) |
| 119 | { |
| 120 | struct quad_buffer_head qbh; |
Akinobu Mita | f4c54fc | 2009-12-15 16:46:56 -0800 | [diff] [blame] | 121 | unsigned long *bits; |
| 122 | unsigned count; |
| 123 | |
| 124 | bits = hpfs_map_4sectors(s, secno, &qbh, 4); |
| 125 | if (!bits) |
| 126 | return 0; |
| 127 | count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | hpfs_brelse4(&qbh); |
| 129 | return count; |
| 130 | } |
| 131 | |
| 132 | static unsigned count_bitmaps(struct super_block *s) |
| 133 | { |
| 134 | unsigned n, count, n_bands; |
| 135 | n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; |
| 136 | count = 0; |
| 137 | for (n = 0; n < n_bands; n++) |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 138 | count += hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | return count; |
| 140 | } |
| 141 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 142 | static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 144 | struct super_block *s = dentry->d_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | struct hpfs_sb_info *sbi = hpfs_sb(s); |
Coly Li | 604d295 | 2009-04-02 16:59:37 -0700 | [diff] [blame] | 146 | u64 id = huge_encode_dev(s->s_bdev->bd_dev); |
Arnd Bergmann | 9a311b9 | 2011-01-22 20:26:12 +0100 | [diff] [blame] | 147 | hpfs_lock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
| 149 | /*if (sbi->sb_n_free == -1) {*/ |
| 150 | sbi->sb_n_free = count_bitmaps(s); |
| 151 | sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); |
| 152 | /*}*/ |
| 153 | buf->f_type = s->s_magic; |
| 154 | buf->f_bsize = 512; |
| 155 | buf->f_blocks = sbi->sb_fs_size; |
| 156 | buf->f_bfree = sbi->sb_n_free; |
| 157 | buf->f_bavail = sbi->sb_n_free; |
| 158 | buf->f_files = sbi->sb_dirband_size / 4; |
| 159 | buf->f_ffree = sbi->sb_n_free_dnodes; |
Coly Li | 604d295 | 2009-04-02 16:59:37 -0700 | [diff] [blame] | 160 | buf->f_fsid.val[0] = (u32)id; |
| 161 | buf->f_fsid.val[1] = (u32)(id >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | buf->f_namelen = 254; |
| 163 | |
Arnd Bergmann | 9a311b9 | 2011-01-22 20:26:12 +0100 | [diff] [blame] | 164 | hpfs_unlock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 169 | static struct kmem_cache * hpfs_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
| 171 | static struct inode *hpfs_alloc_inode(struct super_block *sb) |
| 172 | { |
| 173 | struct hpfs_inode_info *ei; |
Christoph Lameter | e6b4f8d | 2006-12-06 20:33:14 -0800 | [diff] [blame] | 174 | ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | if (!ei) |
| 176 | return NULL; |
| 177 | ei->vfs_inode.i_version = 1; |
| 178 | return &ei->vfs_inode; |
| 179 | } |
| 180 | |
Nick Piggin | fa0d7e3 | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 181 | static void hpfs_i_callback(struct rcu_head *head) |
| 182 | { |
| 183 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 184 | INIT_LIST_HEAD(&inode->i_dentry); |
| 185 | kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); |
| 186 | } |
| 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | static void hpfs_destroy_inode(struct inode *inode) |
| 189 | { |
Nick Piggin | fa0d7e3 | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 190 | call_rcu(&inode->i_rcu, hpfs_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 193 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | { |
| 195 | struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; |
| 196 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 197 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | static int init_inodecache(void) |
| 201 | { |
| 202 | hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", |
| 203 | sizeof(struct hpfs_inode_info), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 204 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 205 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 206 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | if (hpfs_inode_cachep == NULL) |
| 208 | return -ENOMEM; |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static void destroy_inodecache(void) |
| 213 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 214 | kmem_cache_destroy(hpfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | /* |
| 218 | * A tiny parser for option strings, stolen from dosfs. |
| 219 | * Stolen again from read-only hpfs. |
| 220 | * And updated for table-driven option parsing. |
| 221 | */ |
| 222 | |
| 223 | enum { |
| 224 | Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | Opt_check_none, Opt_check_normal, Opt_check_strict, |
| 226 | Opt_err_cont, Opt_err_ro, Opt_err_panic, |
| 227 | Opt_eas_no, Opt_eas_ro, Opt_eas_rw, |
| 228 | Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, |
| 229 | Opt_timeshift, Opt_err, |
| 230 | }; |
| 231 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 232 | static const match_table_t tokens = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | {Opt_help, "help"}, |
| 234 | {Opt_uid, "uid=%u"}, |
| 235 | {Opt_gid, "gid=%u"}, |
| 236 | {Opt_umask, "umask=%o"}, |
| 237 | {Opt_case_lower, "case=lower"}, |
| 238 | {Opt_case_asis, "case=asis"}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | {Opt_check_none, "check=none"}, |
| 240 | {Opt_check_normal, "check=normal"}, |
| 241 | {Opt_check_strict, "check=strict"}, |
| 242 | {Opt_err_cont, "errors=continue"}, |
| 243 | {Opt_err_ro, "errors=remount-ro"}, |
| 244 | {Opt_err_panic, "errors=panic"}, |
| 245 | {Opt_eas_no, "eas=no"}, |
| 246 | {Opt_eas_ro, "eas=ro"}, |
| 247 | {Opt_eas_rw, "eas=rw"}, |
| 248 | {Opt_chkdsk_no, "chkdsk=no"}, |
| 249 | {Opt_chkdsk_errors, "chkdsk=errors"}, |
| 250 | {Opt_chkdsk_always, "chkdsk=always"}, |
| 251 | {Opt_timeshift, "timeshift=%d"}, |
| 252 | {Opt_err, NULL}, |
| 253 | }; |
| 254 | |
| 255 | static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, |
Mikulas Patocka | 0fe105a | 2011-05-08 20:43:19 +0200 | [diff] [blame] | 256 | int *lowercase, int *eas, int *chk, int *errs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | int *chkdsk, int *timeshift) |
| 258 | { |
| 259 | char *p; |
| 260 | int option; |
| 261 | |
| 262 | if (!opts) |
| 263 | return 1; |
| 264 | |
| 265 | /*printk("Parsing opts: '%s'\n",opts);*/ |
| 266 | |
| 267 | while ((p = strsep(&opts, ",")) != NULL) { |
| 268 | substring_t args[MAX_OPT_ARGS]; |
| 269 | int token; |
| 270 | if (!*p) |
| 271 | continue; |
| 272 | |
| 273 | token = match_token(p, tokens, args); |
| 274 | switch (token) { |
| 275 | case Opt_help: |
| 276 | return 2; |
| 277 | case Opt_uid: |
| 278 | if (match_int(args, &option)) |
| 279 | return 0; |
| 280 | *uid = option; |
| 281 | break; |
| 282 | case Opt_gid: |
| 283 | if (match_int(args, &option)) |
| 284 | return 0; |
| 285 | *gid = option; |
| 286 | break; |
| 287 | case Opt_umask: |
| 288 | if (match_octal(args, &option)) |
| 289 | return 0; |
| 290 | *umask = option; |
| 291 | break; |
| 292 | case Opt_case_lower: |
| 293 | *lowercase = 1; |
| 294 | break; |
| 295 | case Opt_case_asis: |
| 296 | *lowercase = 0; |
| 297 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | case Opt_check_none: |
| 299 | *chk = 0; |
| 300 | break; |
| 301 | case Opt_check_normal: |
| 302 | *chk = 1; |
| 303 | break; |
| 304 | case Opt_check_strict: |
| 305 | *chk = 2; |
| 306 | break; |
| 307 | case Opt_err_cont: |
| 308 | *errs = 0; |
| 309 | break; |
| 310 | case Opt_err_ro: |
| 311 | *errs = 1; |
| 312 | break; |
| 313 | case Opt_err_panic: |
| 314 | *errs = 2; |
| 315 | break; |
| 316 | case Opt_eas_no: |
| 317 | *eas = 0; |
| 318 | break; |
| 319 | case Opt_eas_ro: |
| 320 | *eas = 1; |
| 321 | break; |
| 322 | case Opt_eas_rw: |
| 323 | *eas = 2; |
| 324 | break; |
| 325 | case Opt_chkdsk_no: |
| 326 | *chkdsk = 0; |
| 327 | break; |
| 328 | case Opt_chkdsk_errors: |
| 329 | *chkdsk = 1; |
| 330 | break; |
| 331 | case Opt_chkdsk_always: |
| 332 | *chkdsk = 2; |
| 333 | break; |
| 334 | case Opt_timeshift: |
| 335 | { |
| 336 | int m = 1; |
| 337 | char *rhs = args[0].from; |
| 338 | if (!rhs || !*rhs) |
| 339 | return 0; |
| 340 | if (*rhs == '-') m = -1; |
| 341 | if (*rhs == '+' || *rhs == '-') rhs++; |
| 342 | *timeshift = simple_strtoul(rhs, &rhs, 0) * m; |
| 343 | if (*rhs) |
| 344 | return 0; |
| 345 | break; |
| 346 | } |
| 347 | default: |
| 348 | return 0; |
| 349 | } |
| 350 | } |
| 351 | return 1; |
| 352 | } |
| 353 | |
| 354 | static inline void hpfs_help(void) |
| 355 | { |
| 356 | printk("\n\ |
| 357 | HPFS filesystem options:\n\ |
| 358 | help do not mount and display this text\n\ |
| 359 | uid=xxx set uid of files that don't have uid specified in eas\n\ |
| 360 | gid=xxx set gid of files that don't have gid specified in eas\n\ |
| 361 | umask=xxx set mode of files that don't have mode specified in eas\n\ |
| 362 | case=lower lowercase all files\n\ |
| 363 | case=asis do not lowercase files (default)\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | check=none no fs checks - kernel may crash on corrupted filesystem\n\ |
| 365 | check=normal do some checks - it should not crash (default)\n\ |
| 366 | check=strict do extra time-consuming checks, used for debugging\n\ |
| 367 | errors=continue continue on errors\n\ |
| 368 | errors=remount-ro remount read-only if errors found (default)\n\ |
| 369 | errors=panic panic on errors\n\ |
| 370 | chkdsk=no do not mark fs for chkdsking even if there were errors\n\ |
| 371 | chkdsk=errors mark fs dirty if errors found (default)\n\ |
| 372 | chkdsk=always always mark fs dirty - used for debugging\n\ |
| 373 | eas=no ignore extended attributes\n\ |
| 374 | eas=ro read but do not write extended attributes\n\ |
| 375 | eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ |
| 376 | timeshift=nnn add nnn seconds to file times\n\ |
| 377 | \n"); |
| 378 | } |
| 379 | |
| 380 | static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) |
| 381 | { |
| 382 | uid_t uid; |
| 383 | gid_t gid; |
| 384 | umode_t umask; |
Mikulas Patocka | 0fe105a | 2011-05-08 20:43:19 +0200 | [diff] [blame] | 385 | int lowercase, eas, chk, errs, chkdsk, timeshift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | int o; |
| 387 | struct hpfs_sb_info *sbi = hpfs_sb(s); |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 388 | char *new_opts = kstrdup(data, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
| 390 | *flags |= MS_NOATIME; |
| 391 | |
Arnd Bergmann | 9a311b9 | 2011-01-22 20:26:12 +0100 | [diff] [blame] | 392 | hpfs_lock(s); |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 393 | lock_super(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | uid = sbi->sb_uid; gid = sbi->sb_gid; |
| 395 | umask = 0777 & ~sbi->sb_mode; |
Mikulas Patocka | 0fe105a | 2011-05-08 20:43:19 +0200 | [diff] [blame] | 396 | lowercase = sbi->sb_lowercase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; |
| 398 | errs = sbi->sb_err; timeshift = sbi->sb_timeshift; |
| 399 | |
Mikulas Patocka | 0fe105a | 2011-05-08 20:43:19 +0200 | [diff] [blame] | 400 | if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | &eas, &chk, &errs, &chkdsk, ×hift))) { |
| 402 | printk("HPFS: bad mount options.\n"); |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 403 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
| 405 | if (o == 2) { |
| 406 | hpfs_help(); |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 407 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | if (timeshift != sbi->sb_timeshift) { |
| 410 | printk("HPFS: timeshift can't be changed using remount.\n"); |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 411 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | unmark_dirty(s); |
| 415 | |
| 416 | sbi->sb_uid = uid; sbi->sb_gid = gid; |
| 417 | sbi->sb_mode = 0777 & ~umask; |
Mikulas Patocka | 0fe105a | 2011-05-08 20:43:19 +0200 | [diff] [blame] | 418 | sbi->sb_lowercase = lowercase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; |
| 420 | sbi->sb_err = errs; sbi->sb_timeshift = timeshift; |
| 421 | |
Mikulas Patocka | dab4c82 | 2011-05-08 20:44:08 +0200 | [diff] [blame] | 422 | if (!(*flags & MS_RDONLY)) mark_dirty(s, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
Al Viro | 2a32ceb | 2009-05-08 16:05:57 -0400 | [diff] [blame] | 424 | replace_mount_options(s, new_opts); |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 425 | |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 426 | unlock_super(s); |
Arnd Bergmann | 9a311b9 | 2011-01-22 20:26:12 +0100 | [diff] [blame] | 427 | hpfs_unlock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | return 0; |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 429 | |
| 430 | out_err: |
Al Viro | bbd6851 | 2009-05-06 10:43:07 -0400 | [diff] [blame] | 431 | unlock_super(s); |
Arnd Bergmann | 9a311b9 | 2011-01-22 20:26:12 +0100 | [diff] [blame] | 432 | hpfs_unlock(s); |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 433 | kfree(new_opts); |
| 434 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | /* Super operations */ |
| 438 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 439 | static const struct super_operations hpfs_sops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | { |
| 441 | .alloc_inode = hpfs_alloc_inode, |
| 442 | .destroy_inode = hpfs_destroy_inode, |
Al Viro | ea54400 | 2010-06-07 00:18:40 -0400 | [diff] [blame] | 443 | .evict_inode = hpfs_evict_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | .put_super = hpfs_put_super, |
| 445 | .statfs = hpfs_statfs, |
| 446 | .remount_fs = hpfs_remount_fs, |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 447 | .show_options = generic_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | }; |
| 449 | |
| 450 | static int hpfs_fill_super(struct super_block *s, void *options, int silent) |
| 451 | { |
| 452 | struct buffer_head *bh0, *bh1, *bh2; |
| 453 | struct hpfs_boot_block *bootblock; |
| 454 | struct hpfs_super_block *superblock; |
| 455 | struct hpfs_spare_block *spareblock; |
| 456 | struct hpfs_sb_info *sbi; |
| 457 | struct inode *root; |
| 458 | |
| 459 | uid_t uid; |
| 460 | gid_t gid; |
| 461 | umode_t umask; |
Mikulas Patocka | 0fe105a | 2011-05-08 20:43:19 +0200 | [diff] [blame] | 462 | int lowercase, eas, chk, errs, chkdsk, timeshift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
| 464 | dnode_secno root_dno; |
| 465 | struct hpfs_dirent *de = NULL; |
| 466 | struct quad_buffer_head qbh; |
| 467 | |
| 468 | int o; |
| 469 | |
Miklos Szeredi | 6d9c1fd | 2008-02-08 04:21:44 -0800 | [diff] [blame] | 470 | save_mount_options(s, options); |
| 471 | |
Panagiotis Issaris | f8314dc | 2006-09-27 01:49:37 -0700 | [diff] [blame] | 472 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
Jan Blunck | db71922 | 2010-08-15 22:51:10 +0200 | [diff] [blame] | 473 | if (!sbi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | return -ENOMEM; |
Jan Blunck | db71922 | 2010-08-15 22:51:10 +0200 | [diff] [blame] | 475 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | s->s_fs_info = sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
| 478 | sbi->sb_bmp_dir = NULL; |
| 479 | sbi->sb_cp_table = NULL; |
| 480 | |
Mikulas Patocka | 7dd29d8 | 2011-05-08 20:42:54 +0200 | [diff] [blame] | 481 | mutex_init(&sbi->hpfs_mutex); |
| 482 | hpfs_lock(s); |
| 483 | |
David Howells | de395b8 | 2008-11-14 10:38:55 +1100 | [diff] [blame] | 484 | uid = current_uid(); |
| 485 | gid = current_gid(); |
Al Viro | ce3b0f8 | 2009-03-29 19:08:22 -0400 | [diff] [blame] | 486 | umask = current_umask(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | lowercase = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | eas = 2; |
| 489 | chk = 1; |
| 490 | errs = 1; |
| 491 | chkdsk = 1; |
| 492 | timeshift = 0; |
| 493 | |
Mikulas Patocka | 0fe105a | 2011-05-08 20:43:19 +0200 | [diff] [blame] | 494 | if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | &eas, &chk, &errs, &chkdsk, ×hift))) { |
| 496 | printk("HPFS: bad mount options.\n"); |
| 497 | goto bail0; |
| 498 | } |
| 499 | if (o==2) { |
| 500 | hpfs_help(); |
| 501 | goto bail0; |
| 502 | } |
| 503 | |
| 504 | /*sbi->sb_mounting = 1;*/ |
| 505 | sb_set_blocksize(s, 512); |
| 506 | sbi->sb_fs_size = -1; |
| 507 | if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; |
| 508 | if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; |
| 509 | if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; |
| 510 | |
| 511 | /* Check magics */ |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 512 | if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC |
| 513 | ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC |
| 514 | || le32_to_cpu(spareblock->magic) != SP_MAGIC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); |
| 516 | goto bail4; |
| 517 | } |
| 518 | |
| 519 | /* Check version */ |
| 520 | if (!(s->s_flags & MS_RDONLY) && |
| 521 | superblock->funcversion != 2 && superblock->funcversion != 3) { |
| 522 | printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", |
| 523 | (int)superblock->version, (int)superblock->funcversion); |
| 524 | printk("HPFS: please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - mikulas@artax.karlin.mff.cuni.cz\n"); |
| 525 | goto bail4; |
| 526 | } |
| 527 | |
| 528 | s->s_flags |= MS_NOATIME; |
| 529 | |
| 530 | /* Fill superblock stuff */ |
| 531 | s->s_magic = HPFS_SUPER_MAGIC; |
| 532 | s->s_op = &hpfs_sops; |
Al Viro | 43d344d | 2011-01-12 16:12:05 -0500 | [diff] [blame] | 533 | s->s_d_op = &hpfs_dentry_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 535 | sbi->sb_root = le32_to_cpu(superblock->root); |
| 536 | sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors); |
| 537 | sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps); |
| 538 | sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start); |
| 539 | sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band); |
| 540 | sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | sbi->sb_uid = uid; |
| 542 | sbi->sb_gid = gid; |
| 543 | sbi->sb_mode = 0777 & ~umask; |
| 544 | sbi->sb_n_free = -1; |
| 545 | sbi->sb_n_free_dnodes = -1; |
| 546 | sbi->sb_lowercase = lowercase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | sbi->sb_eas = eas; |
| 548 | sbi->sb_chk = chk; |
| 549 | sbi->sb_chkdsk = chkdsk; |
| 550 | sbi->sb_err = errs; |
| 551 | sbi->sb_timeshift = timeshift; |
| 552 | sbi->sb_was_error = 0; |
| 553 | sbi->sb_cp_table = NULL; |
| 554 | sbi->sb_c_bitmap = -1; |
| 555 | sbi->sb_max_fwd_alloc = 0xffffff; |
| 556 | |
| 557 | /* Load bitmap directory */ |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 558 | if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | goto bail4; |
| 560 | |
| 561 | /* Check for general fs errors*/ |
| 562 | if (spareblock->dirty && !spareblock->old_wrote) { |
| 563 | if (errs == 2) { |
| 564 | printk("HPFS: Improperly stopped, not mounted\n"); |
| 565 | goto bail4; |
| 566 | } |
| 567 | hpfs_error(s, "improperly stopped"); |
| 568 | } |
| 569 | |
| 570 | if (!(s->s_flags & MS_RDONLY)) { |
| 571 | spareblock->dirty = 1; |
| 572 | spareblock->old_wrote = 0; |
| 573 | mark_buffer_dirty(bh2); |
| 574 | } |
| 575 | |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 576 | if (le32_to_cpu(spareblock->hotfixes_used) || le32_to_cpu(spareblock->n_spares_used)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | if (errs >= 2) { |
| 578 | printk("HPFS: Hotfixes not supported here, try chkdsk\n"); |
Mikulas Patocka | dab4c82 | 2011-05-08 20:44:08 +0200 | [diff] [blame] | 579 | mark_dirty(s, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | goto bail4; |
| 581 | } |
| 582 | hpfs_error(s, "hotfixes not supported here, try chkdsk"); |
| 583 | if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); |
| 584 | else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); |
| 585 | } |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 586 | if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | if (errs >= 2) { |
| 588 | printk("HPFS: Spare dnodes used, try chkdsk\n"); |
Mikulas Patocka | dab4c82 | 2011-05-08 20:44:08 +0200 | [diff] [blame] | 589 | mark_dirty(s, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | goto bail4; |
| 591 | } |
| 592 | hpfs_error(s, "warning: spare dnodes used, try chkdsk"); |
| 593 | if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); |
| 594 | } |
| 595 | if (chk) { |
| 596 | unsigned a; |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 597 | if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) || |
| 598 | le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 600 | le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | goto bail4; |
| 602 | } |
| 603 | a = sbi->sb_dirband_size; |
| 604 | sbi->sb_dirband_size = 0; |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 605 | if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") || |
| 606 | hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") || |
| 607 | hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) { |
Mikulas Patocka | dab4c82 | 2011-05-08 20:44:08 +0200 | [diff] [blame] | 608 | mark_dirty(s, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | goto bail4; |
| 610 | } |
| 611 | sbi->sb_dirband_size = a; |
| 612 | } else printk("HPFS: You really don't want any checks? You are crazy...\n"); |
| 613 | |
| 614 | /* Load code page table */ |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 615 | if (le32_to_cpu(spareblock->n_code_pages)) |
| 616 | if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | printk("HPFS: Warning: code page support is disabled\n"); |
| 618 | |
| 619 | brelse(bh2); |
| 620 | brelse(bh1); |
| 621 | brelse(bh0); |
| 622 | |
| 623 | root = iget_locked(s, sbi->sb_root); |
| 624 | if (!root) |
| 625 | goto bail0; |
| 626 | hpfs_init_inode(root); |
| 627 | hpfs_read_inode(root); |
| 628 | unlock_new_inode(root); |
| 629 | s->s_root = d_alloc_root(root); |
| 630 | if (!s->s_root) { |
| 631 | iput(root); |
| 632 | goto bail0; |
| 633 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
| 635 | /* |
| 636 | * find the root directory's . pointer & finish filling in the inode |
| 637 | */ |
| 638 | |
| 639 | root_dno = hpfs_fnode_dno(s, sbi->sb_root); |
| 640 | if (root_dno) |
| 641 | de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); |
| 642 | if (!de) |
| 643 | hpfs_error(s, "unable to find root dir"); |
| 644 | else { |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 645 | root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | root->i_atime.tv_nsec = 0; |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 647 | root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | root->i_mtime.tv_nsec = 0; |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 649 | root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | root->i_ctime.tv_nsec = 0; |
Mikulas Patocka | 0b69760 | 2011-05-08 20:44:26 +0200 | [diff] [blame^] | 651 | hpfs_i(root)->i_ea_size = le16_to_cpu(de->ea_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | hpfs_i(root)->i_parent_dir = root->i_ino; |
| 653 | if (root->i_size == -1) |
| 654 | root->i_size = 2048; |
| 655 | if (root->i_blocks == -1) |
| 656 | root->i_blocks = 5; |
| 657 | hpfs_brelse4(&qbh); |
| 658 | } |
Mikulas Patocka | 7dd29d8 | 2011-05-08 20:42:54 +0200 | [diff] [blame] | 659 | hpfs_unlock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | return 0; |
| 661 | |
| 662 | bail4: brelse(bh2); |
| 663 | bail3: brelse(bh1); |
| 664 | bail2: brelse(bh0); |
| 665 | bail1: |
| 666 | bail0: |
Mikulas Patocka | 7dd29d8 | 2011-05-08 20:42:54 +0200 | [diff] [blame] | 667 | hpfs_unlock(s); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 668 | kfree(sbi->sb_bmp_dir); |
| 669 | kfree(sbi->sb_cp_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | s->s_fs_info = NULL; |
| 671 | kfree(sbi); |
| 672 | return -EINVAL; |
| 673 | } |
| 674 | |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 675 | static struct dentry *hpfs_mount(struct file_system_type *fs_type, |
| 676 | int flags, const char *dev_name, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | { |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 678 | return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | static struct file_system_type hpfs_fs_type = { |
| 682 | .owner = THIS_MODULE, |
| 683 | .name = "hpfs", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 684 | .mount = hpfs_mount, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | .kill_sb = kill_block_super, |
| 686 | .fs_flags = FS_REQUIRES_DEV, |
| 687 | }; |
| 688 | |
| 689 | static int __init init_hpfs_fs(void) |
| 690 | { |
| 691 | int err = init_inodecache(); |
| 692 | if (err) |
| 693 | goto out1; |
| 694 | err = register_filesystem(&hpfs_fs_type); |
| 695 | if (err) |
| 696 | goto out; |
| 697 | return 0; |
| 698 | out: |
| 699 | destroy_inodecache(); |
| 700 | out1: |
| 701 | return err; |
| 702 | } |
| 703 | |
| 704 | static void __exit exit_hpfs_fs(void) |
| 705 | { |
| 706 | unregister_filesystem(&hpfs_fs_type); |
| 707 | destroy_inodecache(); |
| 708 | } |
| 709 | |
| 710 | module_init(init_hpfs_fs) |
| 711 | module_exit(exit_hpfs_fs) |
| 712 | MODULE_LICENSE("GPL"); |