Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * super.c - NTFS kernel super block handling. Part of the Linux-NTFS project. |
| 3 | * |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 4 | * Copyright (c) 2001-2007 Anton Altaparmakov |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (c) 2001,2002 Richard Russon |
| 6 | * |
| 7 | * This program/include file is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as published |
| 9 | * by the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program/include file is distributed in the hope that it will be |
| 13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| 14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program (in the main directory of the Linux-NTFS |
| 19 | * distribution in the file COPYING); if not, write to the Free Software |
| 20 | * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | */ |
| 22 | |
| 23 | #include <linux/stddef.h> |
| 24 | #include <linux/init.h> |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 25 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/string.h> |
| 27 | #include <linux/spinlock.h> |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 28 | #include <linux/blkdev.h> /* For bdev_logical_block_size(). */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/backing-dev.h> |
| 30 | #include <linux/buffer_head.h> |
| 31 | #include <linux/vfs.h> |
| 32 | #include <linux/moduleparam.h> |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 33 | #include <linux/bitmap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
| 35 | #include "sysctl.h" |
| 36 | #include "logfile.h" |
| 37 | #include "quota.h" |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 38 | #include "usnjrnl.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "dir.h" |
| 40 | #include "debug.h" |
| 41 | #include "index.h" |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 42 | #include "inode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "aops.h" |
Anton Altaparmakov | b0d2374 | 2005-04-04 16:20:14 +0100 | [diff] [blame] | 44 | #include "layout.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include "malloc.h" |
| 46 | #include "ntfs.h" |
| 47 | |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 48 | /* Number of mounted filesystems which have compression enabled. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | static unsigned long ntfs_nr_compression_users; |
| 50 | |
| 51 | /* A global default upcase table and a corresponding reference count. */ |
| 52 | static ntfschar *default_upcase = NULL; |
| 53 | static unsigned long ntfs_nr_upcase_users = 0; |
| 54 | |
| 55 | /* Error constants/strings used in inode.c::ntfs_show_options(). */ |
| 56 | typedef enum { |
| 57 | /* One of these must be present, default is ON_ERRORS_CONTINUE. */ |
| 58 | ON_ERRORS_PANIC = 0x01, |
| 59 | ON_ERRORS_REMOUNT_RO = 0x02, |
| 60 | ON_ERRORS_CONTINUE = 0x04, |
| 61 | /* Optional, can be combined with any of the above. */ |
| 62 | ON_ERRORS_RECOVER = 0x10, |
| 63 | } ON_ERRORS_ACTIONS; |
| 64 | |
| 65 | const option_t on_errors_arr[] = { |
| 66 | { ON_ERRORS_PANIC, "panic" }, |
| 67 | { ON_ERRORS_REMOUNT_RO, "remount-ro", }, |
| 68 | { ON_ERRORS_CONTINUE, "continue", }, |
| 69 | { ON_ERRORS_RECOVER, "recover" }, |
| 70 | { 0, NULL } |
| 71 | }; |
| 72 | |
| 73 | /** |
| 74 | * simple_getbool - |
| 75 | * |
| 76 | * Copied from old ntfs driver (which copied from vfat driver). |
| 77 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 78 | static int simple_getbool(char *s, bool *setval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
| 80 | if (s) { |
| 81 | if (!strcmp(s, "1") || !strcmp(s, "yes") || !strcmp(s, "true")) |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 82 | *setval = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | else if (!strcmp(s, "0") || !strcmp(s, "no") || |
| 84 | !strcmp(s, "false")) |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 85 | *setval = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | else |
| 87 | return 0; |
| 88 | } else |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 89 | *setval = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | return 1; |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * parse_options - parse the (re)mount options |
| 95 | * @vol: ntfs volume |
| 96 | * @opt: string containing the (re)mount options |
| 97 | * |
| 98 | * Parse the recognized options in @opt for the ntfs volume described by @vol. |
| 99 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 100 | static bool parse_options(ntfs_volume *vol, char *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | { |
| 102 | char *p, *v, *ov; |
| 103 | static char *utf8 = "utf8"; |
| 104 | int errors = 0, sloppy = 0; |
| 105 | uid_t uid = (uid_t)-1; |
| 106 | gid_t gid = (gid_t)-1; |
| 107 | mode_t fmask = (mode_t)-1, dmask = (mode_t)-1; |
| 108 | int mft_zone_multiplier = -1, on_errors = -1; |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 109 | int show_sys_files = -1, case_sensitive = -1, disable_sparse = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | struct nls_table *nls_map = NULL, *old_nls; |
| 111 | |
| 112 | /* I am lazy... (-8 */ |
| 113 | #define NTFS_GETOPT_WITH_DEFAULT(option, variable, default_value) \ |
| 114 | if (!strcmp(p, option)) { \ |
| 115 | if (!v || !*v) \ |
| 116 | variable = default_value; \ |
| 117 | else { \ |
| 118 | variable = simple_strtoul(ov = v, &v, 0); \ |
| 119 | if (*v) \ |
| 120 | goto needs_val; \ |
| 121 | } \ |
| 122 | } |
| 123 | #define NTFS_GETOPT(option, variable) \ |
| 124 | if (!strcmp(p, option)) { \ |
| 125 | if (!v || !*v) \ |
| 126 | goto needs_arg; \ |
| 127 | variable = simple_strtoul(ov = v, &v, 0); \ |
| 128 | if (*v) \ |
| 129 | goto needs_val; \ |
| 130 | } |
Anton Altaparmakov | 5d46770 | 2005-09-12 14:33:47 +0100 | [diff] [blame] | 131 | #define NTFS_GETOPT_OCTAL(option, variable) \ |
| 132 | if (!strcmp(p, option)) { \ |
| 133 | if (!v || !*v) \ |
| 134 | goto needs_arg; \ |
| 135 | variable = simple_strtoul(ov = v, &v, 8); \ |
| 136 | if (*v) \ |
| 137 | goto needs_val; \ |
| 138 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | #define NTFS_GETOPT_BOOL(option, variable) \ |
| 140 | if (!strcmp(p, option)) { \ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 141 | bool val; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | if (!simple_getbool(v, &val)) \ |
| 143 | goto needs_bool; \ |
| 144 | variable = val; \ |
| 145 | } |
| 146 | #define NTFS_GETOPT_OPTIONS_ARRAY(option, variable, opt_array) \ |
| 147 | if (!strcmp(p, option)) { \ |
| 148 | int _i; \ |
| 149 | if (!v || !*v) \ |
| 150 | goto needs_arg; \ |
| 151 | ov = v; \ |
| 152 | if (variable == -1) \ |
| 153 | variable = 0; \ |
| 154 | for (_i = 0; opt_array[_i].str && *opt_array[_i].str; _i++) \ |
| 155 | if (!strcmp(opt_array[_i].str, v)) { \ |
| 156 | variable |= opt_array[_i].val; \ |
| 157 | break; \ |
| 158 | } \ |
| 159 | if (!opt_array[_i].str || !*opt_array[_i].str) \ |
| 160 | goto needs_val; \ |
| 161 | } |
| 162 | if (!opt || !*opt) |
| 163 | goto no_mount_options; |
| 164 | ntfs_debug("Entering with mount options string: %s", opt); |
| 165 | while ((p = strsep(&opt, ","))) { |
| 166 | if ((v = strchr(p, '='))) |
| 167 | *v++ = 0; |
| 168 | NTFS_GETOPT("uid", uid) |
| 169 | else NTFS_GETOPT("gid", gid) |
Anton Altaparmakov | 5d46770 | 2005-09-12 14:33:47 +0100 | [diff] [blame] | 170 | else NTFS_GETOPT_OCTAL("umask", fmask = dmask) |
| 171 | else NTFS_GETOPT_OCTAL("fmask", fmask) |
| 172 | else NTFS_GETOPT_OCTAL("dmask", dmask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | else NTFS_GETOPT("mft_zone_multiplier", mft_zone_multiplier) |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 174 | else NTFS_GETOPT_WITH_DEFAULT("sloppy", sloppy, true) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | else NTFS_GETOPT_BOOL("show_sys_files", show_sys_files) |
| 176 | else NTFS_GETOPT_BOOL("case_sensitive", case_sensitive) |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 177 | else NTFS_GETOPT_BOOL("disable_sparse", disable_sparse) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | else NTFS_GETOPT_OPTIONS_ARRAY("errors", on_errors, |
| 179 | on_errors_arr) |
| 180 | else if (!strcmp(p, "posix") || !strcmp(p, "show_inodes")) |
| 181 | ntfs_warning(vol->sb, "Ignoring obsolete option %s.", |
| 182 | p); |
| 183 | else if (!strcmp(p, "nls") || !strcmp(p, "iocharset")) { |
| 184 | if (!strcmp(p, "iocharset")) |
| 185 | ntfs_warning(vol->sb, "Option iocharset is " |
| 186 | "deprecated. Please use " |
| 187 | "option nls=<charsetname> in " |
| 188 | "the future."); |
| 189 | if (!v || !*v) |
| 190 | goto needs_arg; |
| 191 | use_utf8: |
| 192 | old_nls = nls_map; |
| 193 | nls_map = load_nls(v); |
| 194 | if (!nls_map) { |
| 195 | if (!old_nls) { |
| 196 | ntfs_error(vol->sb, "NLS character set " |
| 197 | "%s not found.", v); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 198 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | ntfs_error(vol->sb, "NLS character set %s not " |
| 201 | "found. Using previous one %s.", |
| 202 | v, old_nls->charset); |
| 203 | nls_map = old_nls; |
| 204 | } else /* nls_map */ { |
Thomas Gleixner | 6d729e4 | 2009-08-16 21:05:08 +0000 | [diff] [blame] | 205 | unload_nls(old_nls); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | } |
| 207 | } else if (!strcmp(p, "utf8")) { |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 208 | bool val = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | ntfs_warning(vol->sb, "Option utf8 is no longer " |
| 210 | "supported, using option nls=utf8. Please " |
| 211 | "use option nls=utf8 in the future and " |
| 212 | "make sure utf8 is compiled either as a " |
| 213 | "module or into the kernel."); |
| 214 | if (!v || !*v) |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 215 | val = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | else if (!simple_getbool(v, &val)) |
| 217 | goto needs_bool; |
| 218 | if (val) { |
| 219 | v = utf8; |
| 220 | goto use_utf8; |
| 221 | } |
| 222 | } else { |
| 223 | ntfs_error(vol->sb, "Unrecognized mount option %s.", p); |
| 224 | if (errors < INT_MAX) |
| 225 | errors++; |
| 226 | } |
| 227 | #undef NTFS_GETOPT_OPTIONS_ARRAY |
| 228 | #undef NTFS_GETOPT_BOOL |
| 229 | #undef NTFS_GETOPT |
| 230 | #undef NTFS_GETOPT_WITH_DEFAULT |
| 231 | } |
| 232 | no_mount_options: |
| 233 | if (errors && !sloppy) |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 234 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | if (sloppy) |
| 236 | ntfs_warning(vol->sb, "Sloppy option given. Ignoring " |
| 237 | "unrecognized mount option(s) and continuing."); |
| 238 | /* Keep this first! */ |
| 239 | if (on_errors != -1) { |
| 240 | if (!on_errors) { |
| 241 | ntfs_error(vol->sb, "Invalid errors option argument " |
| 242 | "or bug in options parser."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 243 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | } |
| 245 | } |
| 246 | if (nls_map) { |
| 247 | if (vol->nls_map && vol->nls_map != nls_map) { |
| 248 | ntfs_error(vol->sb, "Cannot change NLS character set " |
| 249 | "on remount."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 250 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } /* else (!vol->nls_map) */ |
| 252 | ntfs_debug("Using NLS character set %s.", nls_map->charset); |
| 253 | vol->nls_map = nls_map; |
| 254 | } else /* (!nls_map) */ { |
| 255 | if (!vol->nls_map) { |
| 256 | vol->nls_map = load_nls_default(); |
| 257 | if (!vol->nls_map) { |
| 258 | ntfs_error(vol->sb, "Failed to load default " |
| 259 | "NLS character set."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 260 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | } |
| 262 | ntfs_debug("Using default NLS character set (%s).", |
| 263 | vol->nls_map->charset); |
| 264 | } |
| 265 | } |
| 266 | if (mft_zone_multiplier != -1) { |
| 267 | if (vol->mft_zone_multiplier && vol->mft_zone_multiplier != |
| 268 | mft_zone_multiplier) { |
| 269 | ntfs_error(vol->sb, "Cannot change mft_zone_multiplier " |
| 270 | "on remount."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 271 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | } |
| 273 | if (mft_zone_multiplier < 1 || mft_zone_multiplier > 4) { |
| 274 | ntfs_error(vol->sb, "Invalid mft_zone_multiplier. " |
| 275 | "Using default value, i.e. 1."); |
| 276 | mft_zone_multiplier = 1; |
| 277 | } |
| 278 | vol->mft_zone_multiplier = mft_zone_multiplier; |
| 279 | } |
| 280 | if (!vol->mft_zone_multiplier) |
| 281 | vol->mft_zone_multiplier = 1; |
| 282 | if (on_errors != -1) |
| 283 | vol->on_errors = on_errors; |
| 284 | if (!vol->on_errors || vol->on_errors == ON_ERRORS_RECOVER) |
| 285 | vol->on_errors |= ON_ERRORS_CONTINUE; |
| 286 | if (uid != (uid_t)-1) |
| 287 | vol->uid = uid; |
| 288 | if (gid != (gid_t)-1) |
| 289 | vol->gid = gid; |
| 290 | if (fmask != (mode_t)-1) |
| 291 | vol->fmask = fmask; |
| 292 | if (dmask != (mode_t)-1) |
| 293 | vol->dmask = dmask; |
| 294 | if (show_sys_files != -1) { |
| 295 | if (show_sys_files) |
| 296 | NVolSetShowSystemFiles(vol); |
| 297 | else |
| 298 | NVolClearShowSystemFiles(vol); |
| 299 | } |
| 300 | if (case_sensitive != -1) { |
| 301 | if (case_sensitive) |
| 302 | NVolSetCaseSensitive(vol); |
| 303 | else |
| 304 | NVolClearCaseSensitive(vol); |
| 305 | } |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 306 | if (disable_sparse != -1) { |
| 307 | if (disable_sparse) |
| 308 | NVolClearSparseEnabled(vol); |
| 309 | else { |
| 310 | if (!NVolSparseEnabled(vol) && |
| 311 | vol->major_ver && vol->major_ver < 3) |
| 312 | ntfs_warning(vol->sb, "Not enabling sparse " |
| 313 | "support due to NTFS volume " |
| 314 | "version %i.%i (need at least " |
| 315 | "version 3.0).", vol->major_ver, |
| 316 | vol->minor_ver); |
| 317 | else |
| 318 | NVolSetSparseEnabled(vol); |
| 319 | } |
| 320 | } |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 321 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | needs_arg: |
| 323 | ntfs_error(vol->sb, "The %s option requires an argument.", p); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 324 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | needs_bool: |
| 326 | ntfs_error(vol->sb, "The %s option requires a boolean argument.", p); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 327 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | needs_val: |
| 329 | ntfs_error(vol->sb, "Invalid %s option argument: %s", p, ov); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 330 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | #ifdef NTFS_RW |
| 334 | |
| 335 | /** |
| 336 | * ntfs_write_volume_flags - write new flags to the volume information flags |
| 337 | * @vol: ntfs volume on which to modify the flags |
| 338 | * @flags: new flags value for the volume information flags |
| 339 | * |
| 340 | * Internal function. You probably want to use ntfs_{set,clear}_volume_flags() |
| 341 | * instead (see below). |
| 342 | * |
| 343 | * Replace the volume information flags on the volume @vol with the value |
| 344 | * supplied in @flags. Note, this overwrites the volume information flags, so |
| 345 | * make sure to combine the flags you want to modify with the old flags and use |
| 346 | * the result when calling ntfs_write_volume_flags(). |
| 347 | * |
| 348 | * Return 0 on success and -errno on error. |
| 349 | */ |
| 350 | static int ntfs_write_volume_flags(ntfs_volume *vol, const VOLUME_FLAGS flags) |
| 351 | { |
| 352 | ntfs_inode *ni = NTFS_I(vol->vol_ino); |
| 353 | MFT_RECORD *m; |
| 354 | VOLUME_INFORMATION *vi; |
| 355 | ntfs_attr_search_ctx *ctx; |
| 356 | int err; |
| 357 | |
| 358 | ntfs_debug("Entering, old flags = 0x%x, new flags = 0x%x.", |
| 359 | le16_to_cpu(vol->vol_flags), le16_to_cpu(flags)); |
| 360 | if (vol->vol_flags == flags) |
| 361 | goto done; |
| 362 | BUG_ON(!ni); |
| 363 | m = map_mft_record(ni); |
| 364 | if (IS_ERR(m)) { |
| 365 | err = PTR_ERR(m); |
| 366 | goto err_out; |
| 367 | } |
| 368 | ctx = ntfs_attr_get_search_ctx(ni, m); |
| 369 | if (!ctx) { |
| 370 | err = -ENOMEM; |
| 371 | goto put_unm_err_out; |
| 372 | } |
| 373 | err = ntfs_attr_lookup(AT_VOLUME_INFORMATION, NULL, 0, 0, 0, NULL, 0, |
| 374 | ctx); |
| 375 | if (err) |
| 376 | goto put_unm_err_out; |
| 377 | vi = (VOLUME_INFORMATION*)((u8*)ctx->attr + |
| 378 | le16_to_cpu(ctx->attr->data.resident.value_offset)); |
| 379 | vol->vol_flags = vi->flags = flags; |
| 380 | flush_dcache_mft_record_page(ctx->ntfs_ino); |
| 381 | mark_mft_record_dirty(ctx->ntfs_ino); |
| 382 | ntfs_attr_put_search_ctx(ctx); |
| 383 | unmap_mft_record(ni); |
| 384 | done: |
| 385 | ntfs_debug("Done."); |
| 386 | return 0; |
| 387 | put_unm_err_out: |
| 388 | if (ctx) |
| 389 | ntfs_attr_put_search_ctx(ctx); |
| 390 | unmap_mft_record(ni); |
| 391 | err_out: |
| 392 | ntfs_error(vol->sb, "Failed with error code %i.", -err); |
| 393 | return err; |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * ntfs_set_volume_flags - set bits in the volume information flags |
| 398 | * @vol: ntfs volume on which to modify the flags |
| 399 | * @flags: flags to set on the volume |
| 400 | * |
| 401 | * Set the bits in @flags in the volume information flags on the volume @vol. |
| 402 | * |
| 403 | * Return 0 on success and -errno on error. |
| 404 | */ |
| 405 | static inline int ntfs_set_volume_flags(ntfs_volume *vol, VOLUME_FLAGS flags) |
| 406 | { |
| 407 | flags &= VOLUME_FLAGS_MASK; |
| 408 | return ntfs_write_volume_flags(vol, vol->vol_flags | flags); |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * ntfs_clear_volume_flags - clear bits in the volume information flags |
| 413 | * @vol: ntfs volume on which to modify the flags |
| 414 | * @flags: flags to clear on the volume |
| 415 | * |
| 416 | * Clear the bits in @flags in the volume information flags on the volume @vol. |
| 417 | * |
| 418 | * Return 0 on success and -errno on error. |
| 419 | */ |
| 420 | static inline int ntfs_clear_volume_flags(ntfs_volume *vol, VOLUME_FLAGS flags) |
| 421 | { |
| 422 | flags &= VOLUME_FLAGS_MASK; |
| 423 | flags = vol->vol_flags & cpu_to_le16(~le16_to_cpu(flags)); |
| 424 | return ntfs_write_volume_flags(vol, flags); |
| 425 | } |
| 426 | |
| 427 | #endif /* NTFS_RW */ |
| 428 | |
| 429 | /** |
| 430 | * ntfs_remount - change the mount options of a mounted ntfs filesystem |
| 431 | * @sb: superblock of mounted ntfs filesystem |
| 432 | * @flags: remount flags |
| 433 | * @opt: remount options string |
| 434 | * |
| 435 | * Change the mount options of an already mounted ntfs filesystem. |
| 436 | * |
| 437 | * NOTE: The VFS sets the @sb->s_flags remount flags to @flags after |
| 438 | * ntfs_remount() returns successfully (i.e. returns 0). Otherwise, |
| 439 | * @sb->s_flags are not changed. |
| 440 | */ |
| 441 | static int ntfs_remount(struct super_block *sb, int *flags, char *opt) |
| 442 | { |
| 443 | ntfs_volume *vol = NTFS_SB(sb); |
| 444 | |
| 445 | ntfs_debug("Entering with remount options string: %s", opt); |
Alessio Igor Bogani | 337eb00 | 2009-05-12 15:10:54 +0200 | [diff] [blame] | 446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | #ifndef NTFS_RW |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 448 | /* For read-only compiled driver, enforce read-only flag. */ |
| 449 | *flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | #else /* NTFS_RW */ |
| 451 | /* |
| 452 | * For the read-write compiled driver, if we are remounting read-write, |
| 453 | * make sure there are no volume errors and that no unsupported volume |
| 454 | * flags are set. Also, empty the logfile journal as it would become |
| 455 | * stale as soon as something is written to the volume and mark the |
| 456 | * volume dirty so that chkdsk is run if the volume is not umounted |
| 457 | * cleanly. Finally, mark the quotas out of date so Windows rescans |
| 458 | * the volume on boot and updates them. |
| 459 | * |
| 460 | * When remounting read-only, mark the volume clean if no volume errors |
| 461 | * have occured. |
| 462 | */ |
| 463 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { |
| 464 | static const char *es = ". Cannot remount read-write."; |
| 465 | |
| 466 | /* Remounting read-write. */ |
| 467 | if (NVolErrors(vol)) { |
| 468 | ntfs_error(sb, "Volume has errors and is read-only%s", |
| 469 | es); |
| 470 | return -EROFS; |
| 471 | } |
| 472 | if (vol->vol_flags & VOLUME_IS_DIRTY) { |
| 473 | ntfs_error(sb, "Volume is dirty and read-only%s", es); |
| 474 | return -EROFS; |
| 475 | } |
Anton Altaparmakov | 1cf3109f | 2006-02-24 10:48:14 +0000 | [diff] [blame] | 476 | if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) { |
| 477 | ntfs_error(sb, "Volume has been modified by chkdsk " |
| 478 | "and is read-only%s", es); |
| 479 | return -EROFS; |
| 480 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) { |
Anton Altaparmakov | 1cf3109f | 2006-02-24 10:48:14 +0000 | [diff] [blame] | 482 | ntfs_error(sb, "Volume has unsupported flags set " |
| 483 | "(0x%x) and is read-only%s", |
| 484 | (unsigned)le16_to_cpu(vol->vol_flags), |
| 485 | es); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | return -EROFS; |
| 487 | } |
| 488 | if (ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) { |
| 489 | ntfs_error(sb, "Failed to set dirty bit in volume " |
| 490 | "information flags%s", es); |
| 491 | return -EROFS; |
| 492 | } |
| 493 | #if 0 |
| 494 | // TODO: Enable this code once we start modifying anything that |
| 495 | // is different between NTFS 1.2 and 3.x... |
| 496 | /* Set NT4 compatibility flag on newer NTFS version volumes. */ |
| 497 | if ((vol->major_ver > 1)) { |
| 498 | if (ntfs_set_volume_flags(vol, VOLUME_MOUNTED_ON_NT4)) { |
| 499 | ntfs_error(sb, "Failed to set NT4 " |
| 500 | "compatibility flag%s", es); |
| 501 | NVolSetErrors(vol); |
| 502 | return -EROFS; |
| 503 | } |
| 504 | } |
| 505 | #endif |
| 506 | if (!ntfs_empty_logfile(vol->logfile_ino)) { |
| 507 | ntfs_error(sb, "Failed to empty journal $LogFile%s", |
| 508 | es); |
| 509 | NVolSetErrors(vol); |
| 510 | return -EROFS; |
| 511 | } |
| 512 | if (!ntfs_mark_quotas_out_of_date(vol)) { |
| 513 | ntfs_error(sb, "Failed to mark quotas out of date%s", |
| 514 | es); |
| 515 | NVolSetErrors(vol); |
| 516 | return -EROFS; |
| 517 | } |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 518 | if (!ntfs_stamp_usnjrnl(vol)) { |
| 519 | ntfs_error(sb, "Failed to stamp transation log " |
| 520 | "($UsnJrnl)%s", es); |
| 521 | NVolSetErrors(vol); |
| 522 | return -EROFS; |
| 523 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | } else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) { |
| 525 | /* Remounting read-only. */ |
| 526 | if (!NVolErrors(vol)) { |
| 527 | if (ntfs_clear_volume_flags(vol, VOLUME_IS_DIRTY)) |
| 528 | ntfs_warning(sb, "Failed to clear dirty bit " |
| 529 | "in volume information " |
| 530 | "flags. Run chkdsk."); |
| 531 | } |
| 532 | } |
| 533 | #endif /* NTFS_RW */ |
| 534 | |
| 535 | // TODO: Deal with *flags. |
| 536 | |
Jan Blunck | efdffb5 | 2010-02-24 13:25:33 +0100 | [diff] [blame] | 537 | if (!parse_options(vol, opt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | return -EINVAL; |
Jan Blunck | efdffb5 | 2010-02-24 13:25:33 +0100 | [diff] [blame] | 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | ntfs_debug("Done."); |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * is_boot_sector_ntfs - check whether a boot sector is a valid NTFS boot sector |
| 546 | * @sb: Super block of the device to which @b belongs. |
| 547 | * @b: Boot sector of device @sb to check. |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 548 | * @silent: If 'true', all output will be silenced. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | * |
| 550 | * is_boot_sector_ntfs() checks whether the boot sector @b is a valid NTFS boot |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 551 | * sector. Returns 'true' if it is valid and 'false' if not. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | * |
| 553 | * @sb is only needed for warning/error output, i.e. it can be NULL when silent |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 554 | * is 'true'. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 556 | static bool is_boot_sector_ntfs(const struct super_block *sb, |
| 557 | const NTFS_BOOT_SECTOR *b, const bool silent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | { |
| 559 | /* |
| 560 | * Check that checksum == sum of u32 values from b to the checksum |
Anton Altaparmakov | b0d2374 | 2005-04-04 16:20:14 +0100 | [diff] [blame] | 561 | * field. If checksum is zero, no checking is done. We will work when |
| 562 | * the checksum test fails, since some utilities update the boot sector |
| 563 | * ignoring the checksum which leaves the checksum out-of-date. We |
| 564 | * report a warning if this is the case. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | */ |
Anton Altaparmakov | b0d2374 | 2005-04-04 16:20:14 +0100 | [diff] [blame] | 566 | if ((void*)b < (void*)&b->checksum && b->checksum && !silent) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | le32 *u; |
| 568 | u32 i; |
| 569 | |
| 570 | for (i = 0, u = (le32*)b; u < (le32*)(&b->checksum); ++u) |
| 571 | i += le32_to_cpup(u); |
| 572 | if (le32_to_cpu(b->checksum) != i) |
Anton Altaparmakov | b0d2374 | 2005-04-04 16:20:14 +0100 | [diff] [blame] | 573 | ntfs_warning(sb, "Invalid boot sector checksum."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | /* Check OEMidentifier is "NTFS " */ |
| 576 | if (b->oem_id != magicNTFS) |
| 577 | goto not_ntfs; |
| 578 | /* Check bytes per sector value is between 256 and 4096. */ |
| 579 | if (le16_to_cpu(b->bpb.bytes_per_sector) < 0x100 || |
| 580 | le16_to_cpu(b->bpb.bytes_per_sector) > 0x1000) |
| 581 | goto not_ntfs; |
| 582 | /* Check sectors per cluster value is valid. */ |
| 583 | switch (b->bpb.sectors_per_cluster) { |
| 584 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: case 128: |
| 585 | break; |
| 586 | default: |
| 587 | goto not_ntfs; |
| 588 | } |
Anton Altaparmakov | 7fafb8b | 2005-04-06 16:09:21 +0100 | [diff] [blame] | 589 | /* Check the cluster size is not above the maximum (64kiB). */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | if ((u32)le16_to_cpu(b->bpb.bytes_per_sector) * |
Anton Altaparmakov | 7fafb8b | 2005-04-06 16:09:21 +0100 | [diff] [blame] | 591 | b->bpb.sectors_per_cluster > NTFS_MAX_CLUSTER_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | goto not_ntfs; |
| 593 | /* Check reserved/unused fields are really zero. */ |
| 594 | if (le16_to_cpu(b->bpb.reserved_sectors) || |
| 595 | le16_to_cpu(b->bpb.root_entries) || |
| 596 | le16_to_cpu(b->bpb.sectors) || |
| 597 | le16_to_cpu(b->bpb.sectors_per_fat) || |
| 598 | le32_to_cpu(b->bpb.large_sectors) || b->bpb.fats) |
| 599 | goto not_ntfs; |
| 600 | /* Check clusters per file mft record value is valid. */ |
| 601 | if ((u8)b->clusters_per_mft_record < 0xe1 || |
| 602 | (u8)b->clusters_per_mft_record > 0xf7) |
| 603 | switch (b->clusters_per_mft_record) { |
| 604 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: |
| 605 | break; |
| 606 | default: |
| 607 | goto not_ntfs; |
| 608 | } |
| 609 | /* Check clusters per index block value is valid. */ |
| 610 | if ((u8)b->clusters_per_index_record < 0xe1 || |
| 611 | (u8)b->clusters_per_index_record > 0xf7) |
| 612 | switch (b->clusters_per_index_record) { |
| 613 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: |
| 614 | break; |
| 615 | default: |
| 616 | goto not_ntfs; |
| 617 | } |
| 618 | /* |
| 619 | * Check for valid end of sector marker. We will work without it, but |
| 620 | * many BIOSes will refuse to boot from a bootsector if the magic is |
| 621 | * incorrect, so we emit a warning. |
| 622 | */ |
Harvey Harrison | 63cd8854 | 2009-03-31 15:23:52 -0700 | [diff] [blame] | 623 | if (!silent && b->end_of_sector_marker != cpu_to_le16(0xaa55)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | ntfs_warning(sb, "Invalid end of sector marker."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 625 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | not_ntfs: |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 627 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | } |
| 629 | |
| 630 | /** |
| 631 | * read_ntfs_boot_sector - read the NTFS boot sector of a device |
| 632 | * @sb: super block of device to read the boot sector from |
| 633 | * @silent: if true, suppress all output |
| 634 | * |
| 635 | * Reads the boot sector from the device and validates it. If that fails, tries |
| 636 | * to read the backup boot sector, first from the end of the device a-la NT4 and |
| 637 | * later and then from the middle of the device a-la NT3.51 and before. |
| 638 | * |
| 639 | * If a valid boot sector is found but it is not the primary boot sector, we |
| 640 | * repair the primary boot sector silently (unless the device is read-only or |
| 641 | * the primary boot sector is not accessible). |
| 642 | * |
| 643 | * NOTE: To call this function, @sb must have the fields s_dev, the ntfs super |
| 644 | * block (u.ntfs_sb), nr_blocks and the device flags (s_flags) initialized |
| 645 | * to their respective values. |
| 646 | * |
| 647 | * Return the unlocked buffer head containing the boot sector or NULL on error. |
| 648 | */ |
| 649 | static struct buffer_head *read_ntfs_boot_sector(struct super_block *sb, |
| 650 | const int silent) |
| 651 | { |
| 652 | const char *read_err_str = "Unable to read %s boot sector."; |
| 653 | struct buffer_head *bh_primary, *bh_backup; |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 654 | sector_t nr_blocks = NTFS_SB(sb)->nr_blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
| 656 | /* Try to read primary boot sector. */ |
| 657 | if ((bh_primary = sb_bread(sb, 0))) { |
| 658 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) |
| 659 | bh_primary->b_data, silent)) |
| 660 | return bh_primary; |
| 661 | if (!silent) |
| 662 | ntfs_error(sb, "Primary boot sector is invalid."); |
| 663 | } else if (!silent) |
| 664 | ntfs_error(sb, read_err_str, "primary"); |
| 665 | if (!(NTFS_SB(sb)->on_errors & ON_ERRORS_RECOVER)) { |
| 666 | if (bh_primary) |
| 667 | brelse(bh_primary); |
| 668 | if (!silent) |
| 669 | ntfs_error(sb, "Mount option errors=recover not used. " |
| 670 | "Aborting without trying to recover."); |
| 671 | return NULL; |
| 672 | } |
| 673 | /* Try to read NT4+ backup boot sector. */ |
| 674 | if ((bh_backup = sb_bread(sb, nr_blocks - 1))) { |
| 675 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) |
| 676 | bh_backup->b_data, silent)) |
| 677 | goto hotfix_primary_boot_sector; |
| 678 | brelse(bh_backup); |
| 679 | } else if (!silent) |
| 680 | ntfs_error(sb, read_err_str, "backup"); |
| 681 | /* Try to read NT3.51- backup boot sector. */ |
| 682 | if ((bh_backup = sb_bread(sb, nr_blocks >> 1))) { |
| 683 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) |
| 684 | bh_backup->b_data, silent)) |
| 685 | goto hotfix_primary_boot_sector; |
| 686 | if (!silent) |
| 687 | ntfs_error(sb, "Could not find a valid backup boot " |
| 688 | "sector."); |
| 689 | brelse(bh_backup); |
| 690 | } else if (!silent) |
| 691 | ntfs_error(sb, read_err_str, "backup"); |
| 692 | /* We failed. Cleanup and return. */ |
| 693 | if (bh_primary) |
| 694 | brelse(bh_primary); |
| 695 | return NULL; |
| 696 | hotfix_primary_boot_sector: |
| 697 | if (bh_primary) { |
| 698 | /* |
| 699 | * If we managed to read sector zero and the volume is not |
| 700 | * read-only, copy the found, valid backup boot sector to the |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 701 | * primary boot sector. Note we only copy the actual boot |
| 702 | * sector structure, not the actual whole device sector as that |
| 703 | * may be bigger and would potentially damage the $Boot system |
| 704 | * file (FIXME: Would be nice to know if the backup boot sector |
| 705 | * on a large sector device contains the whole boot loader or |
| 706 | * just the first 512 bytes). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | */ |
| 708 | if (!(sb->s_flags & MS_RDONLY)) { |
| 709 | ntfs_warning(sb, "Hot-fix: Recovering invalid primary " |
| 710 | "boot sector from backup copy."); |
| 711 | memcpy(bh_primary->b_data, bh_backup->b_data, |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 712 | NTFS_BLOCK_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | mark_buffer_dirty(bh_primary); |
| 714 | sync_dirty_buffer(bh_primary); |
| 715 | if (buffer_uptodate(bh_primary)) { |
| 716 | brelse(bh_backup); |
| 717 | return bh_primary; |
| 718 | } |
| 719 | ntfs_error(sb, "Hot-fix: Device write error while " |
| 720 | "recovering primary boot sector."); |
| 721 | } else { |
| 722 | ntfs_warning(sb, "Hot-fix: Recovery of primary boot " |
| 723 | "sector failed: Read-only mount."); |
| 724 | } |
| 725 | brelse(bh_primary); |
| 726 | } |
| 727 | ntfs_warning(sb, "Using backup boot sector."); |
| 728 | return bh_backup; |
| 729 | } |
| 730 | |
| 731 | /** |
| 732 | * parse_ntfs_boot_sector - parse the boot sector and store the data in @vol |
| 733 | * @vol: volume structure to initialise with data from boot sector |
| 734 | * @b: boot sector to parse |
| 735 | * |
| 736 | * Parse the ntfs boot sector @b and store all imporant information therein in |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 737 | * the ntfs super block @vol. Return 'true' on success and 'false' on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 739 | static bool parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | { |
| 741 | unsigned int sectors_per_cluster_bits, nr_hidden_sects; |
| 742 | int clusters_per_mft_record, clusters_per_index_record; |
| 743 | s64 ll; |
| 744 | |
| 745 | vol->sector_size = le16_to_cpu(b->bpb.bytes_per_sector); |
| 746 | vol->sector_size_bits = ffs(vol->sector_size) - 1; |
| 747 | ntfs_debug("vol->sector_size = %i (0x%x)", vol->sector_size, |
| 748 | vol->sector_size); |
| 749 | ntfs_debug("vol->sector_size_bits = %i (0x%x)", vol->sector_size_bits, |
| 750 | vol->sector_size_bits); |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 751 | if (vol->sector_size < vol->sb->s_blocksize) { |
| 752 | ntfs_error(vol->sb, "Sector size (%i) is smaller than the " |
| 753 | "device block size (%lu). This is not " |
| 754 | "supported. Sorry.", vol->sector_size, |
| 755 | vol->sb->s_blocksize); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 756 | return false; |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 757 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | ntfs_debug("sectors_per_cluster = 0x%x", b->bpb.sectors_per_cluster); |
| 759 | sectors_per_cluster_bits = ffs(b->bpb.sectors_per_cluster) - 1; |
| 760 | ntfs_debug("sectors_per_cluster_bits = 0x%x", |
| 761 | sectors_per_cluster_bits); |
| 762 | nr_hidden_sects = le32_to_cpu(b->bpb.hidden_sectors); |
| 763 | ntfs_debug("number of hidden sectors = 0x%x", nr_hidden_sects); |
| 764 | vol->cluster_size = vol->sector_size << sectors_per_cluster_bits; |
| 765 | vol->cluster_size_mask = vol->cluster_size - 1; |
| 766 | vol->cluster_size_bits = ffs(vol->cluster_size) - 1; |
| 767 | ntfs_debug("vol->cluster_size = %i (0x%x)", vol->cluster_size, |
| 768 | vol->cluster_size); |
| 769 | ntfs_debug("vol->cluster_size_mask = 0x%x", vol->cluster_size_mask); |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 770 | ntfs_debug("vol->cluster_size_bits = %i", vol->cluster_size_bits); |
| 771 | if (vol->cluster_size < vol->sector_size) { |
| 772 | ntfs_error(vol->sb, "Cluster size (%i) is smaller than the " |
| 773 | "sector size (%i). This is not supported. " |
| 774 | "Sorry.", vol->cluster_size, vol->sector_size); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 775 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | } |
| 777 | clusters_per_mft_record = b->clusters_per_mft_record; |
| 778 | ntfs_debug("clusters_per_mft_record = %i (0x%x)", |
| 779 | clusters_per_mft_record, clusters_per_mft_record); |
| 780 | if (clusters_per_mft_record > 0) |
| 781 | vol->mft_record_size = vol->cluster_size << |
| 782 | (ffs(clusters_per_mft_record) - 1); |
| 783 | else |
| 784 | /* |
| 785 | * When mft_record_size < cluster_size, clusters_per_mft_record |
| 786 | * = -log2(mft_record_size) bytes. mft_record_size normaly is |
| 787 | * 1024 bytes, which is encoded as 0xF6 (-10 in decimal). |
| 788 | */ |
| 789 | vol->mft_record_size = 1 << -clusters_per_mft_record; |
| 790 | vol->mft_record_size_mask = vol->mft_record_size - 1; |
| 791 | vol->mft_record_size_bits = ffs(vol->mft_record_size) - 1; |
| 792 | ntfs_debug("vol->mft_record_size = %i (0x%x)", vol->mft_record_size, |
| 793 | vol->mft_record_size); |
| 794 | ntfs_debug("vol->mft_record_size_mask = 0x%x", |
| 795 | vol->mft_record_size_mask); |
| 796 | ntfs_debug("vol->mft_record_size_bits = %i (0x%x)", |
| 797 | vol->mft_record_size_bits, vol->mft_record_size_bits); |
| 798 | /* |
| 799 | * We cannot support mft record sizes above the PAGE_CACHE_SIZE since |
| 800 | * we store $MFT/$DATA, the table of mft records in the page cache. |
| 801 | */ |
| 802 | if (vol->mft_record_size > PAGE_CACHE_SIZE) { |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 803 | ntfs_error(vol->sb, "Mft record size (%i) exceeds the " |
| 804 | "PAGE_CACHE_SIZE on your system (%lu). " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | "This is not supported. Sorry.", |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 806 | vol->mft_record_size, PAGE_CACHE_SIZE); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 807 | return false; |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 808 | } |
| 809 | /* We cannot support mft record sizes below the sector size. */ |
| 810 | if (vol->mft_record_size < vol->sector_size) { |
| 811 | ntfs_error(vol->sb, "Mft record size (%i) is smaller than the " |
| 812 | "sector size (%i). This is not supported. " |
| 813 | "Sorry.", vol->mft_record_size, |
| 814 | vol->sector_size); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 815 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | } |
| 817 | clusters_per_index_record = b->clusters_per_index_record; |
| 818 | ntfs_debug("clusters_per_index_record = %i (0x%x)", |
| 819 | clusters_per_index_record, clusters_per_index_record); |
| 820 | if (clusters_per_index_record > 0) |
| 821 | vol->index_record_size = vol->cluster_size << |
| 822 | (ffs(clusters_per_index_record) - 1); |
| 823 | else |
| 824 | /* |
| 825 | * When index_record_size < cluster_size, |
| 826 | * clusters_per_index_record = -log2(index_record_size) bytes. |
| 827 | * index_record_size normaly equals 4096 bytes, which is |
| 828 | * encoded as 0xF4 (-12 in decimal). |
| 829 | */ |
| 830 | vol->index_record_size = 1 << -clusters_per_index_record; |
| 831 | vol->index_record_size_mask = vol->index_record_size - 1; |
| 832 | vol->index_record_size_bits = ffs(vol->index_record_size) - 1; |
| 833 | ntfs_debug("vol->index_record_size = %i (0x%x)", |
| 834 | vol->index_record_size, vol->index_record_size); |
| 835 | ntfs_debug("vol->index_record_size_mask = 0x%x", |
| 836 | vol->index_record_size_mask); |
| 837 | ntfs_debug("vol->index_record_size_bits = %i (0x%x)", |
| 838 | vol->index_record_size_bits, |
| 839 | vol->index_record_size_bits); |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 840 | /* We cannot support index record sizes below the sector size. */ |
| 841 | if (vol->index_record_size < vol->sector_size) { |
| 842 | ntfs_error(vol->sb, "Index record size (%i) is smaller than " |
| 843 | "the sector size (%i). This is not " |
| 844 | "supported. Sorry.", vol->index_record_size, |
| 845 | vol->sector_size); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 846 | return false; |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 847 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | /* |
| 849 | * Get the size of the volume in clusters and check for 64-bit-ness. |
| 850 | * Windows currently only uses 32 bits to save the clusters so we do |
| 851 | * the same as it is much faster on 32-bit CPUs. |
| 852 | */ |
| 853 | ll = sle64_to_cpu(b->number_of_sectors) >> sectors_per_cluster_bits; |
| 854 | if ((u64)ll >= 1ULL << 32) { |
| 855 | ntfs_error(vol->sb, "Cannot handle 64-bit clusters. Sorry."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 856 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | } |
| 858 | vol->nr_clusters = ll; |
| 859 | ntfs_debug("vol->nr_clusters = 0x%llx", (long long)vol->nr_clusters); |
| 860 | /* |
| 861 | * On an architecture where unsigned long is 32-bits, we restrict the |
| 862 | * volume size to 2TiB (2^41). On a 64-bit architecture, the compiler |
| 863 | * will hopefully optimize the whole check away. |
| 864 | */ |
| 865 | if (sizeof(unsigned long) < 8) { |
| 866 | if ((ll << vol->cluster_size_bits) >= (1ULL << 41)) { |
| 867 | ntfs_error(vol->sb, "Volume size (%lluTiB) is too " |
| 868 | "large for this architecture. " |
| 869 | "Maximum supported is 2TiB. Sorry.", |
| 870 | (unsigned long long)ll >> (40 - |
| 871 | vol->cluster_size_bits)); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 872 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | } |
| 874 | } |
| 875 | ll = sle64_to_cpu(b->mft_lcn); |
| 876 | if (ll >= vol->nr_clusters) { |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 877 | ntfs_error(vol->sb, "MFT LCN (%lli, 0x%llx) is beyond end of " |
| 878 | "volume. Weird.", (unsigned long long)ll, |
| 879 | (unsigned long long)ll); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 880 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | } |
| 882 | vol->mft_lcn = ll; |
| 883 | ntfs_debug("vol->mft_lcn = 0x%llx", (long long)vol->mft_lcn); |
| 884 | ll = sle64_to_cpu(b->mftmirr_lcn); |
| 885 | if (ll >= vol->nr_clusters) { |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 886 | ntfs_error(vol->sb, "MFTMirr LCN (%lli, 0x%llx) is beyond end " |
| 887 | "of volume. Weird.", (unsigned long long)ll, |
| 888 | (unsigned long long)ll); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 889 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } |
| 891 | vol->mftmirr_lcn = ll; |
| 892 | ntfs_debug("vol->mftmirr_lcn = 0x%llx", (long long)vol->mftmirr_lcn); |
| 893 | #ifdef NTFS_RW |
| 894 | /* |
| 895 | * Work out the size of the mft mirror in number of mft records. If the |
| 896 | * cluster size is less than or equal to the size taken by four mft |
| 897 | * records, the mft mirror stores the first four mft records. If the |
| 898 | * cluster size is bigger than the size taken by four mft records, the |
| 899 | * mft mirror contains as many mft records as will fit into one |
| 900 | * cluster. |
| 901 | */ |
| 902 | if (vol->cluster_size <= (4 << vol->mft_record_size_bits)) |
| 903 | vol->mftmirr_size = 4; |
| 904 | else |
| 905 | vol->mftmirr_size = vol->cluster_size >> |
| 906 | vol->mft_record_size_bits; |
| 907 | ntfs_debug("vol->mftmirr_size = %i", vol->mftmirr_size); |
| 908 | #endif /* NTFS_RW */ |
| 909 | vol->serial_no = le64_to_cpu(b->volume_serial_number); |
| 910 | ntfs_debug("vol->serial_no = 0x%llx", |
| 911 | (unsigned long long)vol->serial_no); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 912 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | } |
| 914 | |
| 915 | /** |
| 916 | * ntfs_setup_allocators - initialize the cluster and mft allocators |
| 917 | * @vol: volume structure for which to setup the allocators |
| 918 | * |
| 919 | * Setup the cluster (lcn) and mft allocators to the starting values. |
| 920 | */ |
| 921 | static void ntfs_setup_allocators(ntfs_volume *vol) |
| 922 | { |
| 923 | #ifdef NTFS_RW |
| 924 | LCN mft_zone_size, mft_lcn; |
| 925 | #endif /* NTFS_RW */ |
| 926 | |
| 927 | ntfs_debug("vol->mft_zone_multiplier = 0x%x", |
| 928 | vol->mft_zone_multiplier); |
| 929 | #ifdef NTFS_RW |
| 930 | /* Determine the size of the MFT zone. */ |
| 931 | mft_zone_size = vol->nr_clusters; |
| 932 | switch (vol->mft_zone_multiplier) { /* % of volume size in clusters */ |
| 933 | case 4: |
| 934 | mft_zone_size >>= 1; /* 50% */ |
| 935 | break; |
| 936 | case 3: |
| 937 | mft_zone_size = (mft_zone_size + |
| 938 | (mft_zone_size >> 1)) >> 2; /* 37.5% */ |
| 939 | break; |
| 940 | case 2: |
| 941 | mft_zone_size >>= 2; /* 25% */ |
| 942 | break; |
| 943 | /* case 1: */ |
| 944 | default: |
| 945 | mft_zone_size >>= 3; /* 12.5% */ |
| 946 | break; |
| 947 | } |
| 948 | /* Setup the mft zone. */ |
| 949 | vol->mft_zone_start = vol->mft_zone_pos = vol->mft_lcn; |
| 950 | ntfs_debug("vol->mft_zone_pos = 0x%llx", |
| 951 | (unsigned long long)vol->mft_zone_pos); |
| 952 | /* |
| 953 | * Calculate the mft_lcn for an unmodified NTFS volume (see mkntfs |
| 954 | * source) and if the actual mft_lcn is in the expected place or even |
| 955 | * further to the front of the volume, extend the mft_zone to cover the |
| 956 | * beginning of the volume as well. This is in order to protect the |
| 957 | * area reserved for the mft bitmap as well within the mft_zone itself. |
| 958 | * On non-standard volumes we do not protect it as the overhead would |
| 959 | * be higher than the speed increase we would get by doing it. |
| 960 | */ |
| 961 | mft_lcn = (8192 + 2 * vol->cluster_size - 1) / vol->cluster_size; |
| 962 | if (mft_lcn * vol->cluster_size < 16 * 1024) |
| 963 | mft_lcn = (16 * 1024 + vol->cluster_size - 1) / |
| 964 | vol->cluster_size; |
| 965 | if (vol->mft_zone_start <= mft_lcn) |
| 966 | vol->mft_zone_start = 0; |
| 967 | ntfs_debug("vol->mft_zone_start = 0x%llx", |
| 968 | (unsigned long long)vol->mft_zone_start); |
| 969 | /* |
| 970 | * Need to cap the mft zone on non-standard volumes so that it does |
| 971 | * not point outside the boundaries of the volume. We do this by |
| 972 | * halving the zone size until we are inside the volume. |
| 973 | */ |
| 974 | vol->mft_zone_end = vol->mft_lcn + mft_zone_size; |
| 975 | while (vol->mft_zone_end >= vol->nr_clusters) { |
| 976 | mft_zone_size >>= 1; |
| 977 | vol->mft_zone_end = vol->mft_lcn + mft_zone_size; |
| 978 | } |
| 979 | ntfs_debug("vol->mft_zone_end = 0x%llx", |
| 980 | (unsigned long long)vol->mft_zone_end); |
| 981 | /* |
| 982 | * Set the current position within each data zone to the start of the |
| 983 | * respective zone. |
| 984 | */ |
| 985 | vol->data1_zone_pos = vol->mft_zone_end; |
| 986 | ntfs_debug("vol->data1_zone_pos = 0x%llx", |
| 987 | (unsigned long long)vol->data1_zone_pos); |
| 988 | vol->data2_zone_pos = 0; |
| 989 | ntfs_debug("vol->data2_zone_pos = 0x%llx", |
| 990 | (unsigned long long)vol->data2_zone_pos); |
| 991 | |
| 992 | /* Set the mft data allocation position to mft record 24. */ |
| 993 | vol->mft_data_pos = 24; |
| 994 | ntfs_debug("vol->mft_data_pos = 0x%llx", |
| 995 | (unsigned long long)vol->mft_data_pos); |
| 996 | #endif /* NTFS_RW */ |
| 997 | } |
| 998 | |
| 999 | #ifdef NTFS_RW |
| 1000 | |
| 1001 | /** |
| 1002 | * load_and_init_mft_mirror - load and setup the mft mirror inode for a volume |
| 1003 | * @vol: ntfs super block describing device whose mft mirror to load |
| 1004 | * |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1005 | * Return 'true' on success or 'false' on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1007 | static bool load_and_init_mft_mirror(ntfs_volume *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | { |
| 1009 | struct inode *tmp_ino; |
| 1010 | ntfs_inode *tmp_ni; |
| 1011 | |
| 1012 | ntfs_debug("Entering."); |
| 1013 | /* Get mft mirror inode. */ |
| 1014 | tmp_ino = ntfs_iget(vol->sb, FILE_MFTMirr); |
| 1015 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { |
| 1016 | if (!IS_ERR(tmp_ino)) |
| 1017 | iput(tmp_ino); |
| 1018 | /* Caller will display error message. */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1019 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | /* |
| 1022 | * Re-initialize some specifics about $MFTMirr's inode as |
| 1023 | * ntfs_read_inode() will have set up the default ones. |
| 1024 | */ |
| 1025 | /* Set uid and gid to root. */ |
| 1026 | tmp_ino->i_uid = tmp_ino->i_gid = 0; |
| 1027 | /* Regular file. No access for anyone. */ |
| 1028 | tmp_ino->i_mode = S_IFREG; |
| 1029 | /* No VFS initiated operations allowed for $MFTMirr. */ |
| 1030 | tmp_ino->i_op = &ntfs_empty_inode_ops; |
| 1031 | tmp_ino->i_fop = &ntfs_empty_file_ops; |
| 1032 | /* Put in our special address space operations. */ |
| 1033 | tmp_ino->i_mapping->a_ops = &ntfs_mst_aops; |
| 1034 | tmp_ni = NTFS_I(tmp_ino); |
| 1035 | /* The $MFTMirr, like the $MFT is multi sector transfer protected. */ |
| 1036 | NInoSetMstProtected(tmp_ni); |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 1037 | NInoSetSparseDisabled(tmp_ni); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | /* |
| 1039 | * Set up our little cheat allowing us to reuse the async read io |
| 1040 | * completion handler for directories. |
| 1041 | */ |
| 1042 | tmp_ni->itype.index.block_size = vol->mft_record_size; |
| 1043 | tmp_ni->itype.index.block_size_bits = vol->mft_record_size_bits; |
| 1044 | vol->mftmirr_ino = tmp_ino; |
| 1045 | ntfs_debug("Done."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1046 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | /** |
| 1050 | * check_mft_mirror - compare contents of the mft mirror with the mft |
| 1051 | * @vol: ntfs super block describing device whose mft mirror to check |
| 1052 | * |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1053 | * Return 'true' on success or 'false' on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | * |
| 1055 | * Note, this function also results in the mft mirror runlist being completely |
| 1056 | * mapped into memory. The mft mirror write code requires this and will BUG() |
| 1057 | * should it find an unmapped runlist element. |
| 1058 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1059 | static bool check_mft_mirror(ntfs_volume *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | struct super_block *sb = vol->sb; |
| 1062 | ntfs_inode *mirr_ni; |
| 1063 | struct page *mft_page, *mirr_page; |
| 1064 | u8 *kmft, *kmirr; |
| 1065 | runlist_element *rl, rl2[2]; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1066 | pgoff_t index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | int mrecs_per_page, i; |
| 1068 | |
| 1069 | ntfs_debug("Entering."); |
| 1070 | /* Compare contents of $MFT and $MFTMirr. */ |
| 1071 | mrecs_per_page = PAGE_CACHE_SIZE / vol->mft_record_size; |
| 1072 | BUG_ON(!mrecs_per_page); |
| 1073 | BUG_ON(!vol->mftmirr_size); |
| 1074 | mft_page = mirr_page = NULL; |
| 1075 | kmft = kmirr = NULL; |
| 1076 | index = i = 0; |
| 1077 | do { |
| 1078 | u32 bytes; |
| 1079 | |
| 1080 | /* Switch pages if necessary. */ |
| 1081 | if (!(i % mrecs_per_page)) { |
| 1082 | if (index) { |
| 1083 | ntfs_unmap_page(mft_page); |
| 1084 | ntfs_unmap_page(mirr_page); |
| 1085 | } |
| 1086 | /* Get the $MFT page. */ |
| 1087 | mft_page = ntfs_map_page(vol->mft_ino->i_mapping, |
| 1088 | index); |
| 1089 | if (IS_ERR(mft_page)) { |
| 1090 | ntfs_error(sb, "Failed to read $MFT."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1091 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | } |
| 1093 | kmft = page_address(mft_page); |
| 1094 | /* Get the $MFTMirr page. */ |
| 1095 | mirr_page = ntfs_map_page(vol->mftmirr_ino->i_mapping, |
| 1096 | index); |
| 1097 | if (IS_ERR(mirr_page)) { |
| 1098 | ntfs_error(sb, "Failed to read $MFTMirr."); |
| 1099 | goto mft_unmap_out; |
| 1100 | } |
| 1101 | kmirr = page_address(mirr_page); |
| 1102 | ++index; |
| 1103 | } |
Anton Altaparmakov | 949763b | 2006-03-23 15:34:13 +0000 | [diff] [blame] | 1104 | /* Do not check the record if it is not in use. */ |
| 1105 | if (((MFT_RECORD*)kmft)->flags & MFT_RECORD_IN_USE) { |
| 1106 | /* Make sure the record is ok. */ |
| 1107 | if (ntfs_is_baad_recordp((le32*)kmft)) { |
| 1108 | ntfs_error(sb, "Incomplete multi sector " |
| 1109 | "transfer detected in mft " |
| 1110 | "record %i.", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | mm_unmap_out: |
Anton Altaparmakov | 949763b | 2006-03-23 15:34:13 +0000 | [diff] [blame] | 1112 | ntfs_unmap_page(mirr_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | mft_unmap_out: |
Anton Altaparmakov | 949763b | 2006-03-23 15:34:13 +0000 | [diff] [blame] | 1114 | ntfs_unmap_page(mft_page); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1115 | return false; |
Anton Altaparmakov | 949763b | 2006-03-23 15:34:13 +0000 | [diff] [blame] | 1116 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | } |
Anton Altaparmakov | 949763b | 2006-03-23 15:34:13 +0000 | [diff] [blame] | 1118 | /* Do not check the mirror record if it is not in use. */ |
| 1119 | if (((MFT_RECORD*)kmirr)->flags & MFT_RECORD_IN_USE) { |
| 1120 | if (ntfs_is_baad_recordp((le32*)kmirr)) { |
| 1121 | ntfs_error(sb, "Incomplete multi sector " |
| 1122 | "transfer detected in mft " |
| 1123 | "mirror record %i.", i); |
| 1124 | goto mm_unmap_out; |
| 1125 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | } |
| 1127 | /* Get the amount of data in the current record. */ |
| 1128 | bytes = le32_to_cpu(((MFT_RECORD*)kmft)->bytes_in_use); |
Anton Altaparmakov | 949763b | 2006-03-23 15:34:13 +0000 | [diff] [blame] | 1129 | if (bytes < sizeof(MFT_RECORD_OLD) || |
| 1130 | bytes > vol->mft_record_size || |
| 1131 | ntfs_is_baad_recordp((le32*)kmft)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | bytes = le32_to_cpu(((MFT_RECORD*)kmirr)->bytes_in_use); |
Anton Altaparmakov | 949763b | 2006-03-23 15:34:13 +0000 | [diff] [blame] | 1133 | if (bytes < sizeof(MFT_RECORD_OLD) || |
| 1134 | bytes > vol->mft_record_size || |
| 1135 | ntfs_is_baad_recordp((le32*)kmirr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | bytes = vol->mft_record_size; |
| 1137 | } |
| 1138 | /* Compare the two records. */ |
| 1139 | if (memcmp(kmft, kmirr, bytes)) { |
| 1140 | ntfs_error(sb, "$MFT and $MFTMirr (record %i) do not " |
| 1141 | "match. Run ntfsfix or chkdsk.", i); |
| 1142 | goto mm_unmap_out; |
| 1143 | } |
| 1144 | kmft += vol->mft_record_size; |
| 1145 | kmirr += vol->mft_record_size; |
| 1146 | } while (++i < vol->mftmirr_size); |
| 1147 | /* Release the last pages. */ |
| 1148 | ntfs_unmap_page(mft_page); |
| 1149 | ntfs_unmap_page(mirr_page); |
| 1150 | |
| 1151 | /* Construct the mft mirror runlist by hand. */ |
| 1152 | rl2[0].vcn = 0; |
| 1153 | rl2[0].lcn = vol->mftmirr_lcn; |
| 1154 | rl2[0].length = (vol->mftmirr_size * vol->mft_record_size + |
| 1155 | vol->cluster_size - 1) / vol->cluster_size; |
| 1156 | rl2[1].vcn = rl2[0].length; |
| 1157 | rl2[1].lcn = LCN_ENOENT; |
| 1158 | rl2[1].length = 0; |
| 1159 | /* |
| 1160 | * Because we have just read all of the mft mirror, we know we have |
| 1161 | * mapped the full runlist for it. |
| 1162 | */ |
| 1163 | mirr_ni = NTFS_I(vol->mftmirr_ino); |
| 1164 | down_read(&mirr_ni->runlist.lock); |
| 1165 | rl = mirr_ni->runlist.rl; |
| 1166 | /* Compare the two runlists. They must be identical. */ |
| 1167 | i = 0; |
| 1168 | do { |
| 1169 | if (rl2[i].vcn != rl[i].vcn || rl2[i].lcn != rl[i].lcn || |
| 1170 | rl2[i].length != rl[i].length) { |
| 1171 | ntfs_error(sb, "$MFTMirr location mismatch. " |
| 1172 | "Run chkdsk."); |
| 1173 | up_read(&mirr_ni->runlist.lock); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1174 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | } |
| 1176 | } while (rl2[i++].length); |
| 1177 | up_read(&mirr_ni->runlist.lock); |
| 1178 | ntfs_debug("Done."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1179 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | } |
| 1181 | |
| 1182 | /** |
| 1183 | * load_and_check_logfile - load and check the logfile inode for a volume |
| 1184 | * @vol: ntfs super block describing device whose logfile to load |
| 1185 | * |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1186 | * Return 'true' on success or 'false' on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1188 | static bool load_and_check_logfile(ntfs_volume *vol, |
Anton Altaparmakov | e7a1033 | 2005-09-08 16:12:28 +0100 | [diff] [blame] | 1189 | RESTART_PAGE_HEADER **rp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | { |
| 1191 | struct inode *tmp_ino; |
| 1192 | |
| 1193 | ntfs_debug("Entering."); |
| 1194 | tmp_ino = ntfs_iget(vol->sb, FILE_LogFile); |
| 1195 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { |
| 1196 | if (!IS_ERR(tmp_ino)) |
| 1197 | iput(tmp_ino); |
| 1198 | /* Caller will display error message. */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1199 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | } |
Anton Altaparmakov | e7a1033 | 2005-09-08 16:12:28 +0100 | [diff] [blame] | 1201 | if (!ntfs_check_logfile(tmp_ino, rp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | iput(tmp_ino); |
| 1203 | /* ntfs_check_logfile() will have displayed error output. */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1204 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | } |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 1206 | NInoSetSparseDisabled(NTFS_I(tmp_ino)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | vol->logfile_ino = tmp_ino; |
| 1208 | ntfs_debug("Done."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1209 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | } |
| 1211 | |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1212 | #define NTFS_HIBERFIL_HEADER_SIZE 4096 |
| 1213 | |
| 1214 | /** |
| 1215 | * check_windows_hibernation_status - check if Windows is suspended on a volume |
| 1216 | * @vol: ntfs super block of device to check |
| 1217 | * |
| 1218 | * Check if Windows is hibernated on the ntfs volume @vol. This is done by |
| 1219 | * looking for the file hiberfil.sys in the root directory of the volume. If |
| 1220 | * the file is not present Windows is definitely not suspended. |
| 1221 | * |
| 1222 | * If hiberfil.sys exists and is less than 4kiB in size it means Windows is |
| 1223 | * definitely suspended (this volume is not the system volume). Caveat: on a |
| 1224 | * system with many volumes it is possible that the < 4kiB check is bogus but |
| 1225 | * for now this should do fine. |
| 1226 | * |
| 1227 | * If hiberfil.sys exists and is larger than 4kiB in size, we need to read the |
| 1228 | * hiberfil header (which is the first 4kiB). If this begins with "hibr", |
| 1229 | * Windows is definitely suspended. If it is completely full of zeroes, |
| 1230 | * Windows is definitely not hibernated. Any other case is treated as if |
| 1231 | * Windows is suspended. This caters for the above mentioned caveat of a |
| 1232 | * system with many volumes where no "hibr" magic would be present and there is |
| 1233 | * no zero header. |
| 1234 | * |
| 1235 | * Return 0 if Windows is not hibernated on the volume, >0 if Windows is |
| 1236 | * hibernated on the volume, and -errno on error. |
| 1237 | */ |
| 1238 | static int check_windows_hibernation_status(ntfs_volume *vol) |
| 1239 | { |
| 1240 | MFT_REF mref; |
| 1241 | struct inode *vi; |
| 1242 | ntfs_inode *ni; |
| 1243 | struct page *page; |
| 1244 | u32 *kaddr, *kend; |
| 1245 | ntfs_name *name = NULL; |
| 1246 | int ret = 1; |
Harvey Harrison | 63cd8854 | 2009-03-31 15:23:52 -0700 | [diff] [blame] | 1247 | static const ntfschar hiberfil[13] = { cpu_to_le16('h'), |
| 1248 | cpu_to_le16('i'), cpu_to_le16('b'), |
| 1249 | cpu_to_le16('e'), cpu_to_le16('r'), |
| 1250 | cpu_to_le16('f'), cpu_to_le16('i'), |
| 1251 | cpu_to_le16('l'), cpu_to_le16('.'), |
| 1252 | cpu_to_le16('s'), cpu_to_le16('y'), |
| 1253 | cpu_to_le16('s'), 0 }; |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1254 | |
| 1255 | ntfs_debug("Entering."); |
| 1256 | /* |
| 1257 | * Find the inode number for the hibernation file by looking up the |
| 1258 | * filename hiberfil.sys in the root directory. |
| 1259 | */ |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1260 | mutex_lock(&vol->root_ino->i_mutex); |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1261 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->root_ino), hiberfil, 12, |
| 1262 | &name); |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1263 | mutex_unlock(&vol->root_ino->i_mutex); |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1264 | if (IS_ERR_MREF(mref)) { |
| 1265 | ret = MREF_ERR(mref); |
| 1266 | /* If the file does not exist, Windows is not hibernated. */ |
| 1267 | if (ret == -ENOENT) { |
| 1268 | ntfs_debug("hiberfil.sys not present. Windows is not " |
| 1269 | "hibernated on the volume."); |
| 1270 | return 0; |
| 1271 | } |
| 1272 | /* A real error occured. */ |
| 1273 | ntfs_error(vol->sb, "Failed to find inode number for " |
| 1274 | "hiberfil.sys."); |
| 1275 | return ret; |
| 1276 | } |
| 1277 | /* We do not care for the type of match that was found. */ |
| 1278 | kfree(name); |
| 1279 | /* Get the inode. */ |
| 1280 | vi = ntfs_iget(vol->sb, MREF(mref)); |
| 1281 | if (IS_ERR(vi) || is_bad_inode(vi)) { |
| 1282 | if (!IS_ERR(vi)) |
| 1283 | iput(vi); |
| 1284 | ntfs_error(vol->sb, "Failed to load hiberfil.sys."); |
| 1285 | return IS_ERR(vi) ? PTR_ERR(vi) : -EIO; |
| 1286 | } |
| 1287 | if (unlikely(i_size_read(vi) < NTFS_HIBERFIL_HEADER_SIZE)) { |
| 1288 | ntfs_debug("hiberfil.sys is smaller than 4kiB (0x%llx). " |
| 1289 | "Windows is hibernated on the volume. This " |
| 1290 | "is not the system volume.", i_size_read(vi)); |
| 1291 | goto iput_out; |
| 1292 | } |
| 1293 | ni = NTFS_I(vi); |
| 1294 | page = ntfs_map_page(vi->i_mapping, 0); |
| 1295 | if (IS_ERR(page)) { |
| 1296 | ntfs_error(vol->sb, "Failed to read from hiberfil.sys."); |
| 1297 | ret = PTR_ERR(page); |
| 1298 | goto iput_out; |
| 1299 | } |
| 1300 | kaddr = (u32*)page_address(page); |
Harvey Harrison | 63cd8854 | 2009-03-31 15:23:52 -0700 | [diff] [blame] | 1301 | if (*(le32*)kaddr == cpu_to_le32(0x72626968)/*'hibr'*/) { |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1302 | ntfs_debug("Magic \"hibr\" found in hiberfil.sys. Windows is " |
| 1303 | "hibernated on the volume. This is the " |
| 1304 | "system volume."); |
| 1305 | goto unm_iput_out; |
| 1306 | } |
| 1307 | kend = kaddr + NTFS_HIBERFIL_HEADER_SIZE/sizeof(*kaddr); |
| 1308 | do { |
| 1309 | if (unlikely(*kaddr)) { |
| 1310 | ntfs_debug("hiberfil.sys is larger than 4kiB " |
| 1311 | "(0x%llx), does not contain the " |
| 1312 | "\"hibr\" magic, and does not have a " |
| 1313 | "zero header. Windows is hibernated " |
| 1314 | "on the volume. This is not the " |
| 1315 | "system volume.", i_size_read(vi)); |
| 1316 | goto unm_iput_out; |
| 1317 | } |
| 1318 | } while (++kaddr < kend); |
| 1319 | ntfs_debug("hiberfil.sys contains a zero header. Windows is not " |
| 1320 | "hibernated on the volume. This is the system " |
| 1321 | "volume."); |
| 1322 | ret = 0; |
| 1323 | unm_iput_out: |
| 1324 | ntfs_unmap_page(page); |
| 1325 | iput_out: |
| 1326 | iput(vi); |
| 1327 | return ret; |
| 1328 | } |
| 1329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | /** |
| 1331 | * load_and_init_quota - load and setup the quota file for a volume if present |
| 1332 | * @vol: ntfs super block describing device whose quota file to load |
| 1333 | * |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1334 | * Return 'true' on success or 'false' on error. If $Quota is not present, we |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | * leave vol->quota_ino as NULL and return success. |
| 1336 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1337 | static bool load_and_init_quota(ntfs_volume *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | { |
| 1339 | MFT_REF mref; |
| 1340 | struct inode *tmp_ino; |
| 1341 | ntfs_name *name = NULL; |
Harvey Harrison | 63cd8854 | 2009-03-31 15:23:52 -0700 | [diff] [blame] | 1342 | static const ntfschar Quota[7] = { cpu_to_le16('$'), |
| 1343 | cpu_to_le16('Q'), cpu_to_le16('u'), |
| 1344 | cpu_to_le16('o'), cpu_to_le16('t'), |
| 1345 | cpu_to_le16('a'), 0 }; |
| 1346 | static ntfschar Q[3] = { cpu_to_le16('$'), |
| 1347 | cpu_to_le16('Q'), 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | |
| 1349 | ntfs_debug("Entering."); |
| 1350 | /* |
| 1351 | * Find the inode number for the quota file by looking up the filename |
| 1352 | * $Quota in the extended system files directory $Extend. |
| 1353 | */ |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1354 | mutex_lock(&vol->extend_ino->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), Quota, 6, |
| 1356 | &name); |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1357 | mutex_unlock(&vol->extend_ino->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | if (IS_ERR_MREF(mref)) { |
| 1359 | /* |
| 1360 | * If the file does not exist, quotas are disabled and have |
| 1361 | * never been enabled on this volume, just return success. |
| 1362 | */ |
| 1363 | if (MREF_ERR(mref) == -ENOENT) { |
| 1364 | ntfs_debug("$Quota not present. Volume does not have " |
| 1365 | "quotas enabled."); |
| 1366 | /* |
| 1367 | * No need to try to set quotas out of date if they are |
| 1368 | * not enabled. |
| 1369 | */ |
| 1370 | NVolSetQuotaOutOfDate(vol); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1371 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | } |
| 1373 | /* A real error occured. */ |
| 1374 | ntfs_error(vol->sb, "Failed to find inode number for $Quota."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1375 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | } |
| 1377 | /* We do not care for the type of match that was found. */ |
Jesper Juhl | 251c842 | 2005-04-04 14:59:56 +0100 | [diff] [blame] | 1378 | kfree(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | /* Get the inode. */ |
| 1380 | tmp_ino = ntfs_iget(vol->sb, MREF(mref)); |
| 1381 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { |
| 1382 | if (!IS_ERR(tmp_ino)) |
| 1383 | iput(tmp_ino); |
| 1384 | ntfs_error(vol->sb, "Failed to load $Quota."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1385 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | } |
| 1387 | vol->quota_ino = tmp_ino; |
| 1388 | /* Get the $Q index allocation attribute. */ |
| 1389 | tmp_ino = ntfs_index_iget(vol->quota_ino, Q, 2); |
| 1390 | if (IS_ERR(tmp_ino)) { |
| 1391 | ntfs_error(vol->sb, "Failed to load $Quota/$Q index."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1392 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | } |
| 1394 | vol->quota_q_ino = tmp_ino; |
| 1395 | ntfs_debug("Done."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1396 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | } |
| 1398 | |
| 1399 | /** |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1400 | * load_and_init_usnjrnl - load and setup the transaction log if present |
| 1401 | * @vol: ntfs super block describing device whose usnjrnl file to load |
| 1402 | * |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1403 | * Return 'true' on success or 'false' on error. |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1404 | * |
| 1405 | * If $UsnJrnl is not present or in the process of being disabled, we set |
| 1406 | * NVolUsnJrnlStamped() and return success. |
| 1407 | * |
| 1408 | * If the $UsnJrnl $DATA/$J attribute has a size equal to the lowest valid usn, |
| 1409 | * i.e. transaction logging has only just been enabled or the journal has been |
| 1410 | * stamped and nothing has been logged since, we also set NVolUsnJrnlStamped() |
| 1411 | * and return success. |
| 1412 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1413 | static bool load_and_init_usnjrnl(ntfs_volume *vol) |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1414 | { |
| 1415 | MFT_REF mref; |
| 1416 | struct inode *tmp_ino; |
| 1417 | ntfs_inode *tmp_ni; |
| 1418 | struct page *page; |
| 1419 | ntfs_name *name = NULL; |
| 1420 | USN_HEADER *uh; |
Harvey Harrison | 63cd8854 | 2009-03-31 15:23:52 -0700 | [diff] [blame] | 1421 | static const ntfschar UsnJrnl[9] = { cpu_to_le16('$'), |
| 1422 | cpu_to_le16('U'), cpu_to_le16('s'), |
| 1423 | cpu_to_le16('n'), cpu_to_le16('J'), |
| 1424 | cpu_to_le16('r'), cpu_to_le16('n'), |
| 1425 | cpu_to_le16('l'), 0 }; |
| 1426 | static ntfschar Max[5] = { cpu_to_le16('$'), |
| 1427 | cpu_to_le16('M'), cpu_to_le16('a'), |
| 1428 | cpu_to_le16('x'), 0 }; |
| 1429 | static ntfschar J[3] = { cpu_to_le16('$'), |
| 1430 | cpu_to_le16('J'), 0 }; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1431 | |
| 1432 | ntfs_debug("Entering."); |
| 1433 | /* |
| 1434 | * Find the inode number for the transaction log file by looking up the |
| 1435 | * filename $UsnJrnl in the extended system files directory $Extend. |
| 1436 | */ |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1437 | mutex_lock(&vol->extend_ino->i_mutex); |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1438 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), UsnJrnl, 8, |
| 1439 | &name); |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1440 | mutex_unlock(&vol->extend_ino->i_mutex); |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1441 | if (IS_ERR_MREF(mref)) { |
| 1442 | /* |
| 1443 | * If the file does not exist, transaction logging is disabled, |
| 1444 | * just return success. |
| 1445 | */ |
| 1446 | if (MREF_ERR(mref) == -ENOENT) { |
| 1447 | ntfs_debug("$UsnJrnl not present. Volume does not " |
| 1448 | "have transaction logging enabled."); |
| 1449 | not_enabled: |
| 1450 | /* |
| 1451 | * No need to try to stamp the transaction log if |
| 1452 | * transaction logging is not enabled. |
| 1453 | */ |
| 1454 | NVolSetUsnJrnlStamped(vol); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1455 | return true; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1456 | } |
| 1457 | /* A real error occured. */ |
| 1458 | ntfs_error(vol->sb, "Failed to find inode number for " |
| 1459 | "$UsnJrnl."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1460 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1461 | } |
| 1462 | /* We do not care for the type of match that was found. */ |
| 1463 | kfree(name); |
| 1464 | /* Get the inode. */ |
| 1465 | tmp_ino = ntfs_iget(vol->sb, MREF(mref)); |
| 1466 | if (unlikely(IS_ERR(tmp_ino) || is_bad_inode(tmp_ino))) { |
| 1467 | if (!IS_ERR(tmp_ino)) |
| 1468 | iput(tmp_ino); |
| 1469 | ntfs_error(vol->sb, "Failed to load $UsnJrnl."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1470 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1471 | } |
| 1472 | vol->usnjrnl_ino = tmp_ino; |
| 1473 | /* |
| 1474 | * If the transaction log is in the process of being deleted, we can |
| 1475 | * ignore it. |
| 1476 | */ |
| 1477 | if (unlikely(vol->vol_flags & VOLUME_DELETE_USN_UNDERWAY)) { |
| 1478 | ntfs_debug("$UsnJrnl in the process of being disabled. " |
| 1479 | "Volume does not have transaction logging " |
| 1480 | "enabled."); |
| 1481 | goto not_enabled; |
| 1482 | } |
| 1483 | /* Get the $DATA/$Max attribute. */ |
| 1484 | tmp_ino = ntfs_attr_iget(vol->usnjrnl_ino, AT_DATA, Max, 4); |
| 1485 | if (IS_ERR(tmp_ino)) { |
| 1486 | ntfs_error(vol->sb, "Failed to load $UsnJrnl/$DATA/$Max " |
| 1487 | "attribute."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1488 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1489 | } |
| 1490 | vol->usnjrnl_max_ino = tmp_ino; |
| 1491 | if (unlikely(i_size_read(tmp_ino) < sizeof(USN_HEADER))) { |
| 1492 | ntfs_error(vol->sb, "Found corrupt $UsnJrnl/$DATA/$Max " |
| 1493 | "attribute (size is 0x%llx but should be at " |
Anton Altaparmakov | d04bd1f | 2005-10-24 08:41:24 +0100 | [diff] [blame] | 1494 | "least 0x%zx bytes).", i_size_read(tmp_ino), |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1495 | sizeof(USN_HEADER)); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1496 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1497 | } |
| 1498 | /* Get the $DATA/$J attribute. */ |
| 1499 | tmp_ino = ntfs_attr_iget(vol->usnjrnl_ino, AT_DATA, J, 2); |
| 1500 | if (IS_ERR(tmp_ino)) { |
| 1501 | ntfs_error(vol->sb, "Failed to load $UsnJrnl/$DATA/$J " |
| 1502 | "attribute."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1503 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1504 | } |
| 1505 | vol->usnjrnl_j_ino = tmp_ino; |
| 1506 | /* Verify $J is non-resident and sparse. */ |
| 1507 | tmp_ni = NTFS_I(vol->usnjrnl_j_ino); |
| 1508 | if (unlikely(!NInoNonResident(tmp_ni) || !NInoSparse(tmp_ni))) { |
| 1509 | ntfs_error(vol->sb, "$UsnJrnl/$DATA/$J attribute is resident " |
| 1510 | "and/or not sparse."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1511 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1512 | } |
| 1513 | /* Read the USN_HEADER from $DATA/$Max. */ |
| 1514 | page = ntfs_map_page(vol->usnjrnl_max_ino->i_mapping, 0); |
| 1515 | if (IS_ERR(page)) { |
| 1516 | ntfs_error(vol->sb, "Failed to read from $UsnJrnl/$DATA/$Max " |
| 1517 | "attribute."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1518 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1519 | } |
| 1520 | uh = (USN_HEADER*)page_address(page); |
| 1521 | /* Sanity check the $Max. */ |
| 1522 | if (unlikely(sle64_to_cpu(uh->allocation_delta) > |
| 1523 | sle64_to_cpu(uh->maximum_size))) { |
| 1524 | ntfs_error(vol->sb, "Allocation delta (0x%llx) exceeds " |
| 1525 | "maximum size (0x%llx). $UsnJrnl is corrupt.", |
| 1526 | (long long)sle64_to_cpu(uh->allocation_delta), |
| 1527 | (long long)sle64_to_cpu(uh->maximum_size)); |
| 1528 | ntfs_unmap_page(page); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1529 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1530 | } |
| 1531 | /* |
| 1532 | * If the transaction log has been stamped and nothing has been written |
| 1533 | * to it since, we do not need to stamp it. |
| 1534 | */ |
| 1535 | if (unlikely(sle64_to_cpu(uh->lowest_valid_usn) >= |
| 1536 | i_size_read(vol->usnjrnl_j_ino))) { |
| 1537 | if (likely(sle64_to_cpu(uh->lowest_valid_usn) == |
| 1538 | i_size_read(vol->usnjrnl_j_ino))) { |
| 1539 | ntfs_unmap_page(page); |
| 1540 | ntfs_debug("$UsnJrnl is enabled but nothing has been " |
| 1541 | "logged since it was last stamped. " |
| 1542 | "Treating this as if the volume does " |
| 1543 | "not have transaction logging " |
| 1544 | "enabled."); |
| 1545 | goto not_enabled; |
| 1546 | } |
| 1547 | ntfs_error(vol->sb, "$UsnJrnl has lowest valid usn (0x%llx) " |
| 1548 | "which is out of bounds (0x%llx). $UsnJrnl " |
| 1549 | "is corrupt.", |
| 1550 | (long long)sle64_to_cpu(uh->lowest_valid_usn), |
| 1551 | i_size_read(vol->usnjrnl_j_ino)); |
| 1552 | ntfs_unmap_page(page); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1553 | return false; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1554 | } |
| 1555 | ntfs_unmap_page(page); |
| 1556 | ntfs_debug("Done."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1557 | return true; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 1558 | } |
| 1559 | |
| 1560 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | * load_and_init_attrdef - load the attribute definitions table for a volume |
| 1562 | * @vol: ntfs super block describing device whose attrdef to load |
| 1563 | * |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1564 | * Return 'true' on success or 'false' on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1566 | static bool load_and_init_attrdef(ntfs_volume *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | { |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1568 | loff_t i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | struct super_block *sb = vol->sb; |
| 1570 | struct inode *ino; |
| 1571 | struct page *page; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1572 | pgoff_t index, max_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | unsigned int size; |
| 1574 | |
| 1575 | ntfs_debug("Entering."); |
| 1576 | /* Read attrdef table and setup vol->attrdef and vol->attrdef_size. */ |
| 1577 | ino = ntfs_iget(sb, FILE_AttrDef); |
| 1578 | if (IS_ERR(ino) || is_bad_inode(ino)) { |
| 1579 | if (!IS_ERR(ino)) |
| 1580 | iput(ino); |
| 1581 | goto failed; |
| 1582 | } |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 1583 | NInoSetSparseDisabled(NTFS_I(ino)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | /* The size of FILE_AttrDef must be above 0 and fit inside 31 bits. */ |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1585 | i_size = i_size_read(ino); |
| 1586 | if (i_size <= 0 || i_size > 0x7fffffff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | goto iput_failed; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1588 | vol->attrdef = (ATTR_DEF*)ntfs_malloc_nofs(i_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | if (!vol->attrdef) |
| 1590 | goto iput_failed; |
| 1591 | index = 0; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1592 | max_index = i_size >> PAGE_CACHE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | size = PAGE_CACHE_SIZE; |
| 1594 | while (index < max_index) { |
| 1595 | /* Read the attrdef table and copy it into the linear buffer. */ |
| 1596 | read_partial_attrdef_page: |
| 1597 | page = ntfs_map_page(ino->i_mapping, index); |
| 1598 | if (IS_ERR(page)) |
| 1599 | goto free_iput_failed; |
| 1600 | memcpy((u8*)vol->attrdef + (index++ << PAGE_CACHE_SHIFT), |
| 1601 | page_address(page), size); |
| 1602 | ntfs_unmap_page(page); |
| 1603 | }; |
| 1604 | if (size == PAGE_CACHE_SIZE) { |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1605 | size = i_size & ~PAGE_CACHE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | if (size) |
| 1607 | goto read_partial_attrdef_page; |
| 1608 | } |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1609 | vol->attrdef_size = i_size; |
| 1610 | ntfs_debug("Read %llu bytes from $AttrDef.", i_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | iput(ino); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1612 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | free_iput_failed: |
| 1614 | ntfs_free(vol->attrdef); |
| 1615 | vol->attrdef = NULL; |
| 1616 | iput_failed: |
| 1617 | iput(ino); |
| 1618 | failed: |
| 1619 | ntfs_error(sb, "Failed to initialize attribute definition table."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1620 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | } |
| 1622 | |
| 1623 | #endif /* NTFS_RW */ |
| 1624 | |
| 1625 | /** |
| 1626 | * load_and_init_upcase - load the upcase table for an ntfs volume |
| 1627 | * @vol: ntfs super block describing device whose upcase to load |
| 1628 | * |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1629 | * Return 'true' on success or 'false' on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1631 | static bool load_and_init_upcase(ntfs_volume *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | { |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1633 | loff_t i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | struct super_block *sb = vol->sb; |
| 1635 | struct inode *ino; |
| 1636 | struct page *page; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1637 | pgoff_t index, max_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | unsigned int size; |
| 1639 | int i, max; |
| 1640 | |
| 1641 | ntfs_debug("Entering."); |
| 1642 | /* Read upcase table and setup vol->upcase and vol->upcase_len. */ |
| 1643 | ino = ntfs_iget(sb, FILE_UpCase); |
| 1644 | if (IS_ERR(ino) || is_bad_inode(ino)) { |
| 1645 | if (!IS_ERR(ino)) |
| 1646 | iput(ino); |
| 1647 | goto upcase_failed; |
| 1648 | } |
| 1649 | /* |
| 1650 | * The upcase size must not be above 64k Unicode characters, must not |
| 1651 | * be zero and must be a multiple of sizeof(ntfschar). |
| 1652 | */ |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1653 | i_size = i_size_read(ino); |
| 1654 | if (!i_size || i_size & (sizeof(ntfschar) - 1) || |
| 1655 | i_size > 64ULL * 1024 * sizeof(ntfschar)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | goto iput_upcase_failed; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1657 | vol->upcase = (ntfschar*)ntfs_malloc_nofs(i_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | if (!vol->upcase) |
| 1659 | goto iput_upcase_failed; |
| 1660 | index = 0; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1661 | max_index = i_size >> PAGE_CACHE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | size = PAGE_CACHE_SIZE; |
| 1663 | while (index < max_index) { |
| 1664 | /* Read the upcase table and copy it into the linear buffer. */ |
| 1665 | read_partial_upcase_page: |
| 1666 | page = ntfs_map_page(ino->i_mapping, index); |
| 1667 | if (IS_ERR(page)) |
| 1668 | goto iput_upcase_failed; |
| 1669 | memcpy((char*)vol->upcase + (index++ << PAGE_CACHE_SHIFT), |
| 1670 | page_address(page), size); |
| 1671 | ntfs_unmap_page(page); |
| 1672 | }; |
| 1673 | if (size == PAGE_CACHE_SIZE) { |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1674 | size = i_size & ~PAGE_CACHE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | if (size) |
| 1676 | goto read_partial_upcase_page; |
| 1677 | } |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1678 | vol->upcase_len = i_size >> UCHAR_T_SIZE_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | ntfs_debug("Read %llu bytes from $UpCase (expected %zu bytes).", |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1680 | i_size, 64 * 1024 * sizeof(ntfschar)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | iput(ino); |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 1682 | mutex_lock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | if (!default_upcase) { |
| 1684 | ntfs_debug("Using volume specified $UpCase since default is " |
| 1685 | "not present."); |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 1686 | mutex_unlock(&ntfs_lock); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1687 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | } |
| 1689 | max = default_upcase_len; |
| 1690 | if (max > vol->upcase_len) |
| 1691 | max = vol->upcase_len; |
| 1692 | for (i = 0; i < max; i++) |
| 1693 | if (vol->upcase[i] != default_upcase[i]) |
| 1694 | break; |
| 1695 | if (i == max) { |
| 1696 | ntfs_free(vol->upcase); |
| 1697 | vol->upcase = default_upcase; |
| 1698 | vol->upcase_len = max; |
| 1699 | ntfs_nr_upcase_users++; |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 1700 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | ntfs_debug("Volume specified $UpCase matches default. Using " |
| 1702 | "default."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1703 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | } |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 1705 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | ntfs_debug("Using volume specified $UpCase since it does not match " |
| 1707 | "the default."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1708 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | iput_upcase_failed: |
| 1710 | iput(ino); |
| 1711 | ntfs_free(vol->upcase); |
| 1712 | vol->upcase = NULL; |
| 1713 | upcase_failed: |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 1714 | mutex_lock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | if (default_upcase) { |
| 1716 | vol->upcase = default_upcase; |
| 1717 | vol->upcase_len = default_upcase_len; |
| 1718 | ntfs_nr_upcase_users++; |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 1719 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | ntfs_error(sb, "Failed to load $UpCase from the volume. Using " |
| 1721 | "default."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1722 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | } |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 1724 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | ntfs_error(sb, "Failed to initialize upcase table."); |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1726 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | } |
| 1728 | |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 1729 | /* |
| 1730 | * The lcn and mft bitmap inodes are NTFS-internal inodes with |
| 1731 | * their own special locking rules: |
| 1732 | */ |
| 1733 | static struct lock_class_key |
| 1734 | lcnbmp_runlist_lock_key, lcnbmp_mrec_lock_key, |
| 1735 | mftbmp_runlist_lock_key, mftbmp_mrec_lock_key; |
| 1736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | /** |
| 1738 | * load_system_files - open the system files using normal functions |
| 1739 | * @vol: ntfs super block describing device whose system files to load |
| 1740 | * |
| 1741 | * Open the system files with normal access functions and complete setting up |
| 1742 | * the ntfs super block @vol. |
| 1743 | * |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1744 | * Return 'true' on success or 'false' on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 1746 | static bool load_system_files(ntfs_volume *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | { |
| 1748 | struct super_block *sb = vol->sb; |
| 1749 | MFT_RECORD *m; |
| 1750 | VOLUME_INFORMATION *vi; |
| 1751 | ntfs_attr_search_ctx *ctx; |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1752 | #ifdef NTFS_RW |
Anton Altaparmakov | 7d333d6 | 2005-09-08 23:01:16 +0100 | [diff] [blame] | 1753 | RESTART_PAGE_HEADER *rp; |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1754 | int err; |
| 1755 | #endif /* NTFS_RW */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | |
| 1757 | ntfs_debug("Entering."); |
| 1758 | #ifdef NTFS_RW |
| 1759 | /* Get mft mirror inode compare the contents of $MFT and $MFTMirr. */ |
| 1760 | if (!load_and_init_mft_mirror(vol) || !check_mft_mirror(vol)) { |
| 1761 | static const char *es1 = "Failed to load $MFTMirr"; |
| 1762 | static const char *es2 = "$MFTMirr does not match $MFT"; |
| 1763 | static const char *es3 = ". Run ntfsfix and/or chkdsk."; |
| 1764 | |
| 1765 | /* If a read-write mount, convert it to a read-only mount. */ |
| 1766 | if (!(sb->s_flags & MS_RDONLY)) { |
| 1767 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 1768 | ON_ERRORS_CONTINUE))) { |
| 1769 | ntfs_error(sb, "%s and neither on_errors=" |
| 1770 | "continue nor on_errors=" |
| 1771 | "remount-ro was specified%s", |
| 1772 | !vol->mftmirr_ino ? es1 : es2, |
| 1773 | es3); |
| 1774 | goto iput_mirr_err_out; |
| 1775 | } |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 1776 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | ntfs_error(sb, "%s. Mounting read-only%s", |
| 1778 | !vol->mftmirr_ino ? es1 : es2, es3); |
| 1779 | } else |
| 1780 | ntfs_warning(sb, "%s. Will not be able to remount " |
| 1781 | "read-write%s", |
| 1782 | !vol->mftmirr_ino ? es1 : es2, es3); |
| 1783 | /* This will prevent a read-write remount. */ |
| 1784 | NVolSetErrors(vol); |
| 1785 | } |
| 1786 | #endif /* NTFS_RW */ |
| 1787 | /* Get mft bitmap attribute inode. */ |
| 1788 | vol->mftbmp_ino = ntfs_attr_iget(vol->mft_ino, AT_BITMAP, NULL, 0); |
| 1789 | if (IS_ERR(vol->mftbmp_ino)) { |
| 1790 | ntfs_error(sb, "Failed to load $MFT/$BITMAP attribute."); |
| 1791 | goto iput_mirr_err_out; |
| 1792 | } |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 1793 | lockdep_set_class(&NTFS_I(vol->mftbmp_ino)->runlist.lock, |
| 1794 | &mftbmp_runlist_lock_key); |
| 1795 | lockdep_set_class(&NTFS_I(vol->mftbmp_ino)->mrec_lock, |
| 1796 | &mftbmp_mrec_lock_key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | /* Read upcase table and setup @vol->upcase and @vol->upcase_len. */ |
| 1798 | if (!load_and_init_upcase(vol)) |
| 1799 | goto iput_mftbmp_err_out; |
| 1800 | #ifdef NTFS_RW |
| 1801 | /* |
| 1802 | * Read attribute definitions table and setup @vol->attrdef and |
| 1803 | * @vol->attrdef_size. |
| 1804 | */ |
| 1805 | if (!load_and_init_attrdef(vol)) |
| 1806 | goto iput_upcase_err_out; |
| 1807 | #endif /* NTFS_RW */ |
| 1808 | /* |
| 1809 | * Get the cluster allocation bitmap inode and verify the size, no |
| 1810 | * need for any locking at this stage as we are already running |
| 1811 | * exclusively as we are mount in progress task. |
| 1812 | */ |
| 1813 | vol->lcnbmp_ino = ntfs_iget(sb, FILE_Bitmap); |
| 1814 | if (IS_ERR(vol->lcnbmp_ino) || is_bad_inode(vol->lcnbmp_ino)) { |
| 1815 | if (!IS_ERR(vol->lcnbmp_ino)) |
| 1816 | iput(vol->lcnbmp_ino); |
| 1817 | goto bitmap_failed; |
| 1818 | } |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 1819 | lockdep_set_class(&NTFS_I(vol->lcnbmp_ino)->runlist.lock, |
| 1820 | &lcnbmp_runlist_lock_key); |
| 1821 | lockdep_set_class(&NTFS_I(vol->lcnbmp_ino)->mrec_lock, |
| 1822 | &lcnbmp_mrec_lock_key); |
| 1823 | |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 1824 | NInoSetSparseDisabled(NTFS_I(vol->lcnbmp_ino)); |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 1825 | if ((vol->nr_clusters + 7) >> 3 > i_size_read(vol->lcnbmp_ino)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | iput(vol->lcnbmp_ino); |
| 1827 | bitmap_failed: |
| 1828 | ntfs_error(sb, "Failed to load $Bitmap."); |
| 1829 | goto iput_attrdef_err_out; |
| 1830 | } |
| 1831 | /* |
| 1832 | * Get the volume inode and setup our cache of the volume flags and |
| 1833 | * version. |
| 1834 | */ |
| 1835 | vol->vol_ino = ntfs_iget(sb, FILE_Volume); |
| 1836 | if (IS_ERR(vol->vol_ino) || is_bad_inode(vol->vol_ino)) { |
| 1837 | if (!IS_ERR(vol->vol_ino)) |
| 1838 | iput(vol->vol_ino); |
| 1839 | volume_failed: |
| 1840 | ntfs_error(sb, "Failed to load $Volume."); |
| 1841 | goto iput_lcnbmp_err_out; |
| 1842 | } |
| 1843 | m = map_mft_record(NTFS_I(vol->vol_ino)); |
| 1844 | if (IS_ERR(m)) { |
| 1845 | iput_volume_failed: |
| 1846 | iput(vol->vol_ino); |
| 1847 | goto volume_failed; |
| 1848 | } |
| 1849 | if (!(ctx = ntfs_attr_get_search_ctx(NTFS_I(vol->vol_ino), m))) { |
| 1850 | ntfs_error(sb, "Failed to get attribute search context."); |
| 1851 | goto get_ctx_vol_failed; |
| 1852 | } |
| 1853 | if (ntfs_attr_lookup(AT_VOLUME_INFORMATION, NULL, 0, 0, 0, NULL, 0, |
| 1854 | ctx) || ctx->attr->non_resident || ctx->attr->flags) { |
| 1855 | err_put_vol: |
| 1856 | ntfs_attr_put_search_ctx(ctx); |
| 1857 | get_ctx_vol_failed: |
| 1858 | unmap_mft_record(NTFS_I(vol->vol_ino)); |
| 1859 | goto iput_volume_failed; |
| 1860 | } |
| 1861 | vi = (VOLUME_INFORMATION*)((char*)ctx->attr + |
| 1862 | le16_to_cpu(ctx->attr->data.resident.value_offset)); |
| 1863 | /* Some bounds checks. */ |
| 1864 | if ((u8*)vi < (u8*)ctx->attr || (u8*)vi + |
| 1865 | le32_to_cpu(ctx->attr->data.resident.value_length) > |
| 1866 | (u8*)ctx->attr + le32_to_cpu(ctx->attr->length)) |
| 1867 | goto err_put_vol; |
| 1868 | /* Copy the volume flags and version to the ntfs_volume structure. */ |
| 1869 | vol->vol_flags = vi->flags; |
| 1870 | vol->major_ver = vi->major_ver; |
| 1871 | vol->minor_ver = vi->minor_ver; |
| 1872 | ntfs_attr_put_search_ctx(ctx); |
| 1873 | unmap_mft_record(NTFS_I(vol->vol_ino)); |
| 1874 | printk(KERN_INFO "NTFS volume version %i.%i.\n", vol->major_ver, |
| 1875 | vol->minor_ver); |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 1876 | if (vol->major_ver < 3 && NVolSparseEnabled(vol)) { |
| 1877 | ntfs_warning(vol->sb, "Disabling sparse support due to NTFS " |
| 1878 | "volume version %i.%i (need at least version " |
| 1879 | "3.0).", vol->major_ver, vol->minor_ver); |
| 1880 | NVolClearSparseEnabled(vol); |
| 1881 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | #ifdef NTFS_RW |
| 1883 | /* Make sure that no unsupported volume flags are set. */ |
| 1884 | if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) { |
| 1885 | static const char *es1a = "Volume is dirty"; |
Anton Altaparmakov | 1cf3109f | 2006-02-24 10:48:14 +0000 | [diff] [blame] | 1886 | static const char *es1b = "Volume has been modified by chkdsk"; |
| 1887 | static const char *es1c = "Volume has unsupported flags set"; |
| 1888 | static const char *es2a = ". Run chkdsk and mount in Windows."; |
| 1889 | static const char *es2b = ". Mount in Windows."; |
| 1890 | const char *es1, *es2; |
| 1891 | |
| 1892 | es2 = es2a; |
| 1893 | if (vol->vol_flags & VOLUME_IS_DIRTY) |
| 1894 | es1 = es1a; |
| 1895 | else if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) { |
| 1896 | es1 = es1b; |
| 1897 | es2 = es2b; |
| 1898 | } else { |
| 1899 | es1 = es1c; |
| 1900 | ntfs_warning(sb, "Unsupported volume flags 0x%x " |
| 1901 | "encountered.", |
| 1902 | (unsigned)le16_to_cpu(vol->vol_flags)); |
| 1903 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | /* If a read-write mount, convert it to a read-only mount. */ |
| 1905 | if (!(sb->s_flags & MS_RDONLY)) { |
| 1906 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 1907 | ON_ERRORS_CONTINUE))) { |
| 1908 | ntfs_error(sb, "%s and neither on_errors=" |
| 1909 | "continue nor on_errors=" |
| 1910 | "remount-ro was specified%s", |
| 1911 | es1, es2); |
| 1912 | goto iput_vol_err_out; |
| 1913 | } |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 1914 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
| 1916 | } else |
| 1917 | ntfs_warning(sb, "%s. Will not be able to remount " |
| 1918 | "read-write%s", es1, es2); |
| 1919 | /* |
| 1920 | * Do not set NVolErrors() because ntfs_remount() re-checks the |
| 1921 | * flags which we need to do in case any flags have changed. |
| 1922 | */ |
| 1923 | } |
| 1924 | /* |
| 1925 | * Get the inode for the logfile, check it and determine if the volume |
| 1926 | * was shutdown cleanly. |
| 1927 | */ |
Anton Altaparmakov | e7a1033 | 2005-09-08 16:12:28 +0100 | [diff] [blame] | 1928 | rp = NULL; |
| 1929 | if (!load_and_check_logfile(vol, &rp) || |
| 1930 | !ntfs_is_logfile_clean(vol->logfile_ino, rp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | static const char *es1a = "Failed to load $LogFile"; |
| 1932 | static const char *es1b = "$LogFile is not clean"; |
| 1933 | static const char *es2 = ". Mount in Windows."; |
| 1934 | const char *es1; |
| 1935 | |
| 1936 | es1 = !vol->logfile_ino ? es1a : es1b; |
| 1937 | /* If a read-write mount, convert it to a read-only mount. */ |
| 1938 | if (!(sb->s_flags & MS_RDONLY)) { |
| 1939 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 1940 | ON_ERRORS_CONTINUE))) { |
| 1941 | ntfs_error(sb, "%s and neither on_errors=" |
| 1942 | "continue nor on_errors=" |
| 1943 | "remount-ro was specified%s", |
| 1944 | es1, es2); |
Anton Altaparmakov | e7a1033 | 2005-09-08 16:12:28 +0100 | [diff] [blame] | 1945 | if (vol->logfile_ino) { |
| 1946 | BUG_ON(!rp); |
| 1947 | ntfs_free(rp); |
| 1948 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | goto iput_logfile_err_out; |
| 1950 | } |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 1951 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
| 1953 | } else |
| 1954 | ntfs_warning(sb, "%s. Will not be able to remount " |
| 1955 | "read-write%s", es1, es2); |
| 1956 | /* This will prevent a read-write remount. */ |
| 1957 | NVolSetErrors(vol); |
| 1958 | } |
Anton Altaparmakov | e7a1033 | 2005-09-08 16:12:28 +0100 | [diff] [blame] | 1959 | ntfs_free(rp); |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1960 | #endif /* NTFS_RW */ |
| 1961 | /* Get the root directory inode so we can do path lookups. */ |
| 1962 | vol->root_ino = ntfs_iget(sb, FILE_root); |
| 1963 | if (IS_ERR(vol->root_ino) || is_bad_inode(vol->root_ino)) { |
| 1964 | if (!IS_ERR(vol->root_ino)) |
| 1965 | iput(vol->root_ino); |
| 1966 | ntfs_error(sb, "Failed to load root directory."); |
| 1967 | goto iput_logfile_err_out; |
| 1968 | } |
| 1969 | #ifdef NTFS_RW |
| 1970 | /* |
| 1971 | * Check if Windows is suspended to disk on the target volume. If it |
| 1972 | * is hibernated, we must not write *anything* to the disk so set |
| 1973 | * NVolErrors() without setting the dirty volume flag and mount |
| 1974 | * read-only. This will prevent read-write remounting and it will also |
| 1975 | * prevent all writes. |
| 1976 | */ |
| 1977 | err = check_windows_hibernation_status(vol); |
| 1978 | if (unlikely(err)) { |
| 1979 | static const char *es1a = "Failed to determine if Windows is " |
| 1980 | "hibernated"; |
| 1981 | static const char *es1b = "Windows is hibernated"; |
| 1982 | static const char *es2 = ". Run chkdsk."; |
| 1983 | const char *es1; |
| 1984 | |
| 1985 | es1 = err < 0 ? es1a : es1b; |
| 1986 | /* If a read-write mount, convert it to a read-only mount. */ |
| 1987 | if (!(sb->s_flags & MS_RDONLY)) { |
| 1988 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 1989 | ON_ERRORS_CONTINUE))) { |
| 1990 | ntfs_error(sb, "%s and neither on_errors=" |
| 1991 | "continue nor on_errors=" |
| 1992 | "remount-ro was specified%s", |
| 1993 | es1, es2); |
| 1994 | goto iput_root_err_out; |
| 1995 | } |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 1996 | sb->s_flags |= MS_RDONLY; |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 1997 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
| 1998 | } else |
| 1999 | ntfs_warning(sb, "%s. Will not be able to remount " |
| 2000 | "read-write%s", es1, es2); |
| 2001 | /* This will prevent a read-write remount. */ |
| 2002 | NVolSetErrors(vol); |
| 2003 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | /* If (still) a read-write mount, mark the volume dirty. */ |
| 2005 | if (!(sb->s_flags & MS_RDONLY) && |
| 2006 | ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) { |
| 2007 | static const char *es1 = "Failed to set dirty bit in volume " |
| 2008 | "information flags"; |
| 2009 | static const char *es2 = ". Run chkdsk."; |
| 2010 | |
| 2011 | /* Convert to a read-only mount. */ |
| 2012 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 2013 | ON_ERRORS_CONTINUE))) { |
| 2014 | ntfs_error(sb, "%s and neither on_errors=continue nor " |
| 2015 | "on_errors=remount-ro was specified%s", |
| 2016 | es1, es2); |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 2017 | goto iput_root_err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | } |
| 2019 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 2020 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | /* |
| 2022 | * Do not set NVolErrors() because ntfs_remount() might manage |
| 2023 | * to set the dirty flag in which case all would be well. |
| 2024 | */ |
| 2025 | } |
| 2026 | #if 0 |
| 2027 | // TODO: Enable this code once we start modifying anything that is |
| 2028 | // different between NTFS 1.2 and 3.x... |
| 2029 | /* |
| 2030 | * If (still) a read-write mount, set the NT4 compatibility flag on |
| 2031 | * newer NTFS version volumes. |
| 2032 | */ |
| 2033 | if (!(sb->s_flags & MS_RDONLY) && (vol->major_ver > 1) && |
| 2034 | ntfs_set_volume_flags(vol, VOLUME_MOUNTED_ON_NT4)) { |
| 2035 | static const char *es1 = "Failed to set NT4 compatibility flag"; |
| 2036 | static const char *es2 = ". Run chkdsk."; |
| 2037 | |
| 2038 | /* Convert to a read-only mount. */ |
| 2039 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 2040 | ON_ERRORS_CONTINUE))) { |
| 2041 | ntfs_error(sb, "%s and neither on_errors=continue nor " |
| 2042 | "on_errors=remount-ro was specified%s", |
| 2043 | es1, es2); |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 2044 | goto iput_root_err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | } |
| 2046 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 2047 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | NVolSetErrors(vol); |
| 2049 | } |
| 2050 | #endif |
| 2051 | /* If (still) a read-write mount, empty the logfile. */ |
| 2052 | if (!(sb->s_flags & MS_RDONLY) && |
| 2053 | !ntfs_empty_logfile(vol->logfile_ino)) { |
| 2054 | static const char *es1 = "Failed to empty $LogFile"; |
| 2055 | static const char *es2 = ". Mount in Windows."; |
| 2056 | |
| 2057 | /* Convert to a read-only mount. */ |
| 2058 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 2059 | ON_ERRORS_CONTINUE))) { |
| 2060 | ntfs_error(sb, "%s and neither on_errors=continue nor " |
| 2061 | "on_errors=remount-ro was specified%s", |
| 2062 | es1, es2); |
Anton Altaparmakov | ca8fd7a | 2005-06-25 16:31:27 +0100 | [diff] [blame] | 2063 | goto iput_root_err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | } |
| 2065 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 2066 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | NVolSetErrors(vol); |
| 2068 | } |
| 2069 | #endif /* NTFS_RW */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | /* If on NTFS versions before 3.0, we are done. */ |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2071 | if (unlikely(vol->major_ver < 3)) |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 2072 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | /* NTFS 3.0+ specific initialization. */ |
| 2074 | /* Get the security descriptors inode. */ |
| 2075 | vol->secure_ino = ntfs_iget(sb, FILE_Secure); |
| 2076 | if (IS_ERR(vol->secure_ino) || is_bad_inode(vol->secure_ino)) { |
| 2077 | if (!IS_ERR(vol->secure_ino)) |
| 2078 | iput(vol->secure_ino); |
| 2079 | ntfs_error(sb, "Failed to load $Secure."); |
| 2080 | goto iput_root_err_out; |
| 2081 | } |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2082 | // TODO: Initialize security. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | /* Get the extended system files' directory inode. */ |
| 2084 | vol->extend_ino = ntfs_iget(sb, FILE_Extend); |
| 2085 | if (IS_ERR(vol->extend_ino) || is_bad_inode(vol->extend_ino)) { |
| 2086 | if (!IS_ERR(vol->extend_ino)) |
| 2087 | iput(vol->extend_ino); |
| 2088 | ntfs_error(sb, "Failed to load $Extend."); |
| 2089 | goto iput_sec_err_out; |
| 2090 | } |
| 2091 | #ifdef NTFS_RW |
| 2092 | /* Find the quota file, load it if present, and set it up. */ |
| 2093 | if (!load_and_init_quota(vol)) { |
| 2094 | static const char *es1 = "Failed to load $Quota"; |
| 2095 | static const char *es2 = ". Run chkdsk."; |
| 2096 | |
| 2097 | /* If a read-write mount, convert it to a read-only mount. */ |
| 2098 | if (!(sb->s_flags & MS_RDONLY)) { |
| 2099 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 2100 | ON_ERRORS_CONTINUE))) { |
| 2101 | ntfs_error(sb, "%s and neither on_errors=" |
| 2102 | "continue nor on_errors=" |
| 2103 | "remount-ro was specified%s", |
| 2104 | es1, es2); |
| 2105 | goto iput_quota_err_out; |
| 2106 | } |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 2107 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
| 2109 | } else |
| 2110 | ntfs_warning(sb, "%s. Will not be able to remount " |
| 2111 | "read-write%s", es1, es2); |
| 2112 | /* This will prevent a read-write remount. */ |
| 2113 | NVolSetErrors(vol); |
| 2114 | } |
| 2115 | /* If (still) a read-write mount, mark the quotas out of date. */ |
| 2116 | if (!(sb->s_flags & MS_RDONLY) && |
| 2117 | !ntfs_mark_quotas_out_of_date(vol)) { |
| 2118 | static const char *es1 = "Failed to mark quotas out of date"; |
| 2119 | static const char *es2 = ". Run chkdsk."; |
| 2120 | |
| 2121 | /* Convert to a read-only mount. */ |
| 2122 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 2123 | ON_ERRORS_CONTINUE))) { |
| 2124 | ntfs_error(sb, "%s and neither on_errors=continue nor " |
| 2125 | "on_errors=remount-ro was specified%s", |
| 2126 | es1, es2); |
| 2127 | goto iput_quota_err_out; |
| 2128 | } |
| 2129 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 2130 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | NVolSetErrors(vol); |
| 2132 | } |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2133 | /* |
| 2134 | * Find the transaction log file ($UsnJrnl), load it if present, check |
| 2135 | * it, and set it up. |
| 2136 | */ |
| 2137 | if (!load_and_init_usnjrnl(vol)) { |
| 2138 | static const char *es1 = "Failed to load $UsnJrnl"; |
| 2139 | static const char *es2 = ". Run chkdsk."; |
| 2140 | |
| 2141 | /* If a read-write mount, convert it to a read-only mount. */ |
| 2142 | if (!(sb->s_flags & MS_RDONLY)) { |
| 2143 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 2144 | ON_ERRORS_CONTINUE))) { |
| 2145 | ntfs_error(sb, "%s and neither on_errors=" |
| 2146 | "continue nor on_errors=" |
| 2147 | "remount-ro was specified%s", |
| 2148 | es1, es2); |
| 2149 | goto iput_usnjrnl_err_out; |
| 2150 | } |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 2151 | sb->s_flags |= MS_RDONLY; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2152 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
| 2153 | } else |
| 2154 | ntfs_warning(sb, "%s. Will not be able to remount " |
| 2155 | "read-write%s", es1, es2); |
| 2156 | /* This will prevent a read-write remount. */ |
| 2157 | NVolSetErrors(vol); |
| 2158 | } |
| 2159 | /* If (still) a read-write mount, stamp the transaction log. */ |
| 2160 | if (!(sb->s_flags & MS_RDONLY) && !ntfs_stamp_usnjrnl(vol)) { |
| 2161 | static const char *es1 = "Failed to stamp transaction log " |
| 2162 | "($UsnJrnl)"; |
| 2163 | static const char *es2 = ". Run chkdsk."; |
| 2164 | |
| 2165 | /* Convert to a read-only mount. */ |
| 2166 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
| 2167 | ON_ERRORS_CONTINUE))) { |
| 2168 | ntfs_error(sb, "%s and neither on_errors=continue nor " |
| 2169 | "on_errors=remount-ro was specified%s", |
| 2170 | es1, es2); |
| 2171 | goto iput_usnjrnl_err_out; |
| 2172 | } |
| 2173 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 2174 | sb->s_flags |= MS_RDONLY; |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2175 | NVolSetErrors(vol); |
| 2176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | #endif /* NTFS_RW */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 2178 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | #ifdef NTFS_RW |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2180 | iput_usnjrnl_err_out: |
| 2181 | if (vol->usnjrnl_j_ino) |
| 2182 | iput(vol->usnjrnl_j_ino); |
| 2183 | if (vol->usnjrnl_max_ino) |
| 2184 | iput(vol->usnjrnl_max_ino); |
| 2185 | if (vol->usnjrnl_ino) |
| 2186 | iput(vol->usnjrnl_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | iput_quota_err_out: |
| 2188 | if (vol->quota_q_ino) |
| 2189 | iput(vol->quota_q_ino); |
| 2190 | if (vol->quota_ino) |
| 2191 | iput(vol->quota_ino); |
| 2192 | iput(vol->extend_ino); |
| 2193 | #endif /* NTFS_RW */ |
| 2194 | iput_sec_err_out: |
| 2195 | iput(vol->secure_ino); |
| 2196 | iput_root_err_out: |
| 2197 | iput(vol->root_ino); |
| 2198 | iput_logfile_err_out: |
| 2199 | #ifdef NTFS_RW |
| 2200 | if (vol->logfile_ino) |
| 2201 | iput(vol->logfile_ino); |
| 2202 | iput_vol_err_out: |
| 2203 | #endif /* NTFS_RW */ |
| 2204 | iput(vol->vol_ino); |
| 2205 | iput_lcnbmp_err_out: |
| 2206 | iput(vol->lcnbmp_ino); |
| 2207 | iput_attrdef_err_out: |
| 2208 | vol->attrdef_size = 0; |
| 2209 | if (vol->attrdef) { |
| 2210 | ntfs_free(vol->attrdef); |
| 2211 | vol->attrdef = NULL; |
| 2212 | } |
| 2213 | #ifdef NTFS_RW |
| 2214 | iput_upcase_err_out: |
| 2215 | #endif /* NTFS_RW */ |
| 2216 | vol->upcase_len = 0; |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2217 | mutex_lock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | if (vol->upcase == default_upcase) { |
| 2219 | ntfs_nr_upcase_users--; |
| 2220 | vol->upcase = NULL; |
| 2221 | } |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2222 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | if (vol->upcase) { |
| 2224 | ntfs_free(vol->upcase); |
| 2225 | vol->upcase = NULL; |
| 2226 | } |
| 2227 | iput_mftbmp_err_out: |
| 2228 | iput(vol->mftbmp_ino); |
| 2229 | iput_mirr_err_out: |
| 2230 | #ifdef NTFS_RW |
| 2231 | if (vol->mftmirr_ino) |
| 2232 | iput(vol->mftmirr_ino); |
| 2233 | #endif /* NTFS_RW */ |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 2234 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | } |
| 2236 | |
| 2237 | /** |
| 2238 | * ntfs_put_super - called by the vfs to unmount a volume |
| 2239 | * @sb: vfs superblock of volume to unmount |
| 2240 | * |
| 2241 | * ntfs_put_super() is called by the VFS (from fs/super.c::do_umount()) when |
| 2242 | * the volume is being unmounted (umount system call has been invoked) and it |
| 2243 | * releases all inodes and memory belonging to the NTFS specific part of the |
| 2244 | * super block. |
| 2245 | */ |
| 2246 | static void ntfs_put_super(struct super_block *sb) |
| 2247 | { |
| 2248 | ntfs_volume *vol = NTFS_SB(sb); |
| 2249 | |
| 2250 | ntfs_debug("Entering."); |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 2251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | #ifdef NTFS_RW |
| 2253 | /* |
| 2254 | * Commit all inodes while they are still open in case some of them |
| 2255 | * cause others to be dirtied. |
| 2256 | */ |
| 2257 | ntfs_commit_inode(vol->vol_ino); |
| 2258 | |
| 2259 | /* NTFS 3.0+ specific. */ |
| 2260 | if (vol->major_ver >= 3) { |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2261 | if (vol->usnjrnl_j_ino) |
| 2262 | ntfs_commit_inode(vol->usnjrnl_j_ino); |
| 2263 | if (vol->usnjrnl_max_ino) |
| 2264 | ntfs_commit_inode(vol->usnjrnl_max_ino); |
| 2265 | if (vol->usnjrnl_ino) |
| 2266 | ntfs_commit_inode(vol->usnjrnl_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | if (vol->quota_q_ino) |
| 2268 | ntfs_commit_inode(vol->quota_q_ino); |
| 2269 | if (vol->quota_ino) |
| 2270 | ntfs_commit_inode(vol->quota_ino); |
| 2271 | if (vol->extend_ino) |
| 2272 | ntfs_commit_inode(vol->extend_ino); |
| 2273 | if (vol->secure_ino) |
| 2274 | ntfs_commit_inode(vol->secure_ino); |
| 2275 | } |
| 2276 | |
| 2277 | ntfs_commit_inode(vol->root_ino); |
| 2278 | |
| 2279 | down_write(&vol->lcnbmp_lock); |
| 2280 | ntfs_commit_inode(vol->lcnbmp_ino); |
| 2281 | up_write(&vol->lcnbmp_lock); |
| 2282 | |
| 2283 | down_write(&vol->mftbmp_lock); |
| 2284 | ntfs_commit_inode(vol->mftbmp_ino); |
| 2285 | up_write(&vol->mftbmp_lock); |
| 2286 | |
| 2287 | if (vol->logfile_ino) |
| 2288 | ntfs_commit_inode(vol->logfile_ino); |
| 2289 | |
| 2290 | if (vol->mftmirr_ino) |
| 2291 | ntfs_commit_inode(vol->mftmirr_ino); |
| 2292 | ntfs_commit_inode(vol->mft_ino); |
| 2293 | |
| 2294 | /* |
| 2295 | * If a read-write mount and no volume errors have occured, mark the |
| 2296 | * volume clean. Also, re-commit all affected inodes. |
| 2297 | */ |
| 2298 | if (!(sb->s_flags & MS_RDONLY)) { |
| 2299 | if (!NVolErrors(vol)) { |
| 2300 | if (ntfs_clear_volume_flags(vol, VOLUME_IS_DIRTY)) |
| 2301 | ntfs_warning(sb, "Failed to clear dirty bit " |
| 2302 | "in volume information " |
| 2303 | "flags. Run chkdsk."); |
| 2304 | ntfs_commit_inode(vol->vol_ino); |
| 2305 | ntfs_commit_inode(vol->root_ino); |
| 2306 | if (vol->mftmirr_ino) |
| 2307 | ntfs_commit_inode(vol->mftmirr_ino); |
| 2308 | ntfs_commit_inode(vol->mft_ino); |
| 2309 | } else { |
| 2310 | ntfs_warning(sb, "Volume has errors. Leaving volume " |
| 2311 | "marked dirty. Run chkdsk."); |
| 2312 | } |
| 2313 | } |
| 2314 | #endif /* NTFS_RW */ |
| 2315 | |
| 2316 | iput(vol->vol_ino); |
| 2317 | vol->vol_ino = NULL; |
| 2318 | |
| 2319 | /* NTFS 3.0+ specific clean up. */ |
| 2320 | if (vol->major_ver >= 3) { |
| 2321 | #ifdef NTFS_RW |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2322 | if (vol->usnjrnl_j_ino) { |
| 2323 | iput(vol->usnjrnl_j_ino); |
| 2324 | vol->usnjrnl_j_ino = NULL; |
| 2325 | } |
| 2326 | if (vol->usnjrnl_max_ino) { |
| 2327 | iput(vol->usnjrnl_max_ino); |
| 2328 | vol->usnjrnl_max_ino = NULL; |
| 2329 | } |
| 2330 | if (vol->usnjrnl_ino) { |
| 2331 | iput(vol->usnjrnl_ino); |
| 2332 | vol->usnjrnl_ino = NULL; |
| 2333 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | if (vol->quota_q_ino) { |
| 2335 | iput(vol->quota_q_ino); |
| 2336 | vol->quota_q_ino = NULL; |
| 2337 | } |
| 2338 | if (vol->quota_ino) { |
| 2339 | iput(vol->quota_ino); |
| 2340 | vol->quota_ino = NULL; |
| 2341 | } |
| 2342 | #endif /* NTFS_RW */ |
| 2343 | if (vol->extend_ino) { |
| 2344 | iput(vol->extend_ino); |
| 2345 | vol->extend_ino = NULL; |
| 2346 | } |
| 2347 | if (vol->secure_ino) { |
| 2348 | iput(vol->secure_ino); |
| 2349 | vol->secure_ino = NULL; |
| 2350 | } |
| 2351 | } |
| 2352 | |
| 2353 | iput(vol->root_ino); |
| 2354 | vol->root_ino = NULL; |
| 2355 | |
| 2356 | down_write(&vol->lcnbmp_lock); |
| 2357 | iput(vol->lcnbmp_ino); |
| 2358 | vol->lcnbmp_ino = NULL; |
| 2359 | up_write(&vol->lcnbmp_lock); |
| 2360 | |
| 2361 | down_write(&vol->mftbmp_lock); |
| 2362 | iput(vol->mftbmp_ino); |
| 2363 | vol->mftbmp_ino = NULL; |
| 2364 | up_write(&vol->mftbmp_lock); |
| 2365 | |
| 2366 | #ifdef NTFS_RW |
| 2367 | if (vol->logfile_ino) { |
| 2368 | iput(vol->logfile_ino); |
| 2369 | vol->logfile_ino = NULL; |
| 2370 | } |
| 2371 | if (vol->mftmirr_ino) { |
| 2372 | /* Re-commit the mft mirror and mft just in case. */ |
| 2373 | ntfs_commit_inode(vol->mftmirr_ino); |
| 2374 | ntfs_commit_inode(vol->mft_ino); |
| 2375 | iput(vol->mftmirr_ino); |
| 2376 | vol->mftmirr_ino = NULL; |
| 2377 | } |
| 2378 | /* |
Jens Axboe | 13205fb | 2009-05-25 09:30:45 +0200 | [diff] [blame] | 2379 | * We should have no dirty inodes left, due to |
| 2380 | * mft.c::ntfs_mft_writepage() cleaning all the dirty pages as |
| 2381 | * the underlying mft records are written out and cleaned. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2382 | */ |
| 2383 | ntfs_commit_inode(vol->mft_ino); |
| 2384 | write_inode_now(vol->mft_ino, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2385 | #endif /* NTFS_RW */ |
| 2386 | |
| 2387 | iput(vol->mft_ino); |
| 2388 | vol->mft_ino = NULL; |
| 2389 | |
| 2390 | /* Throw away the table of attribute definitions. */ |
| 2391 | vol->attrdef_size = 0; |
| 2392 | if (vol->attrdef) { |
| 2393 | ntfs_free(vol->attrdef); |
| 2394 | vol->attrdef = NULL; |
| 2395 | } |
| 2396 | vol->upcase_len = 0; |
| 2397 | /* |
| 2398 | * Destroy the global default upcase table if necessary. Also decrease |
| 2399 | * the number of upcase users if we are a user. |
| 2400 | */ |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2401 | mutex_lock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2402 | if (vol->upcase == default_upcase) { |
| 2403 | ntfs_nr_upcase_users--; |
| 2404 | vol->upcase = NULL; |
| 2405 | } |
| 2406 | if (!ntfs_nr_upcase_users && default_upcase) { |
| 2407 | ntfs_free(default_upcase); |
| 2408 | default_upcase = NULL; |
| 2409 | } |
| 2410 | if (vol->cluster_size <= 4096 && !--ntfs_nr_compression_users) |
| 2411 | free_compression_buffers(); |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2412 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | if (vol->upcase) { |
| 2414 | ntfs_free(vol->upcase); |
| 2415 | vol->upcase = NULL; |
| 2416 | } |
Thomas Gleixner | 6d729e4 | 2009-08-16 21:05:08 +0000 | [diff] [blame] | 2417 | |
| 2418 | unload_nls(vol->nls_map); |
| 2419 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | sb->s_fs_info = NULL; |
| 2421 | kfree(vol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | } |
| 2423 | |
| 2424 | /** |
| 2425 | * get_nr_free_clusters - return the number of free clusters on a volume |
| 2426 | * @vol: ntfs volume for which to obtain free cluster count |
| 2427 | * |
| 2428 | * Calculate the number of free clusters on the mounted NTFS volume @vol. We |
| 2429 | * actually calculate the number of clusters in use instead because this |
| 2430 | * allows us to not care about partial pages as these will be just zero filled |
| 2431 | * and hence not be counted as allocated clusters. |
| 2432 | * |
| 2433 | * The only particularity is that clusters beyond the end of the logical ntfs |
| 2434 | * volume will be marked as allocated to prevent errors which means we have to |
| 2435 | * discount those at the end. This is important as the cluster bitmap always |
| 2436 | * has a size in multiples of 8 bytes, i.e. up to 63 clusters could be outside |
| 2437 | * the logical volume and marked in use when they are not as they do not exist. |
| 2438 | * |
| 2439 | * If any pages cannot be read we assume all clusters in the erroring pages are |
| 2440 | * in use. This means we return an underestimate on errors which is better than |
| 2441 | * an overestimate. |
| 2442 | */ |
| 2443 | static s64 get_nr_free_clusters(ntfs_volume *vol) |
| 2444 | { |
| 2445 | s64 nr_free = vol->nr_clusters; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | struct address_space *mapping = vol->lcnbmp_ino->i_mapping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | struct page *page; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2448 | pgoff_t index, max_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2449 | |
| 2450 | ntfs_debug("Entering."); |
| 2451 | /* Serialize accesses to the cluster bitmap. */ |
| 2452 | down_read(&vol->lcnbmp_lock); |
| 2453 | /* |
| 2454 | * Convert the number of bits into bytes rounded up, then convert into |
| 2455 | * multiples of PAGE_CACHE_SIZE, rounding up so that if we have one |
| 2456 | * full and one partial page max_index = 2. |
| 2457 | */ |
| 2458 | max_index = (((vol->nr_clusters + 7) >> 3) + PAGE_CACHE_SIZE - 1) >> |
| 2459 | PAGE_CACHE_SHIFT; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2460 | /* Use multiples of 4 bytes, thus max_size is PAGE_CACHE_SIZE / 4. */ |
| 2461 | ntfs_debug("Reading $Bitmap, max_index = 0x%lx, max_size = 0x%lx.", |
| 2462 | max_index, PAGE_CACHE_SIZE / 4); |
| 2463 | for (index = 0; index < max_index; index++) { |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 2464 | unsigned long *kaddr; |
| 2465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | /* |
| 2467 | * Read the page from page cache, getting it from backing store |
| 2468 | * if necessary, and increment the use count. |
| 2469 | */ |
Nick Piggin | 6fe6900 | 2007-05-06 14:49:04 -0700 | [diff] [blame] | 2470 | page = read_mapping_page(mapping, index, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | /* Ignore pages which errored synchronously. */ |
| 2472 | if (IS_ERR(page)) { |
Nick Piggin | 6fe6900 | 2007-05-06 14:49:04 -0700 | [diff] [blame] | 2473 | ntfs_debug("read_mapping_page() error. Skipping " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | "page (index 0x%lx).", index); |
| 2475 | nr_free -= PAGE_CACHE_SIZE * 8; |
| 2476 | continue; |
| 2477 | } |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 2478 | kaddr = kmap_atomic(page, KM_USER0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | /* |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 2480 | * Subtract the number of set bits. If this |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2481 | * is the last page and it is partial we don't really care as |
| 2482 | * it just means we do a little extra work but it won't affect |
| 2483 | * the result as all out of range bytes are set to zero by |
| 2484 | * ntfs_readpage(). |
| 2485 | */ |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 2486 | nr_free -= bitmap_weight(kaddr, |
| 2487 | PAGE_CACHE_SIZE * BITS_PER_BYTE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | kunmap_atomic(kaddr, KM_USER0); |
| 2489 | page_cache_release(page); |
| 2490 | } |
| 2491 | ntfs_debug("Finished reading $Bitmap, last index = 0x%lx.", index - 1); |
| 2492 | /* |
| 2493 | * Fixup for eventual bits outside logical ntfs volume (see function |
| 2494 | * description above). |
| 2495 | */ |
| 2496 | if (vol->nr_clusters & 63) |
| 2497 | nr_free += 64 - (vol->nr_clusters & 63); |
| 2498 | up_read(&vol->lcnbmp_lock); |
| 2499 | /* If errors occured we may well have gone below zero, fix this. */ |
| 2500 | if (nr_free < 0) |
| 2501 | nr_free = 0; |
| 2502 | ntfs_debug("Exiting."); |
| 2503 | return nr_free; |
| 2504 | } |
| 2505 | |
| 2506 | /** |
| 2507 | * __get_nr_free_mft_records - return the number of free inodes on a volume |
| 2508 | * @vol: ntfs volume for which to obtain free inode count |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2509 | * @nr_free: number of mft records in filesystem |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2510 | * @max_index: maximum number of pages containing set bits |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | * |
| 2512 | * Calculate the number of free mft records (inodes) on the mounted NTFS |
| 2513 | * volume @vol. We actually calculate the number of mft records in use instead |
| 2514 | * because this allows us to not care about partial pages as these will be just |
| 2515 | * zero filled and hence not be counted as allocated mft record. |
| 2516 | * |
| 2517 | * If any pages cannot be read we assume all mft records in the erroring pages |
| 2518 | * are in use. This means we return an underestimate on errors which is better |
| 2519 | * than an overestimate. |
| 2520 | * |
| 2521 | * NOTE: Caller must hold mftbmp_lock rw_semaphore for reading or writing. |
| 2522 | */ |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2523 | static unsigned long __get_nr_free_mft_records(ntfs_volume *vol, |
| 2524 | s64 nr_free, const pgoff_t max_index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | struct address_space *mapping = vol->mftbmp_ino->i_mapping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | struct page *page; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2528 | pgoff_t index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | |
| 2530 | ntfs_debug("Entering."); |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2531 | /* Use multiples of 4 bytes, thus max_size is PAGE_CACHE_SIZE / 4. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | ntfs_debug("Reading $MFT/$BITMAP, max_index = 0x%lx, max_size = " |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2533 | "0x%lx.", max_index, PAGE_CACHE_SIZE / 4); |
| 2534 | for (index = 0; index < max_index; index++) { |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 2535 | unsigned long *kaddr; |
| 2536 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | /* |
| 2538 | * Read the page from page cache, getting it from backing store |
| 2539 | * if necessary, and increment the use count. |
| 2540 | */ |
Nick Piggin | 6fe6900 | 2007-05-06 14:49:04 -0700 | [diff] [blame] | 2541 | page = read_mapping_page(mapping, index, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | /* Ignore pages which errored synchronously. */ |
| 2543 | if (IS_ERR(page)) { |
Nick Piggin | 6fe6900 | 2007-05-06 14:49:04 -0700 | [diff] [blame] | 2544 | ntfs_debug("read_mapping_page() error. Skipping " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | "page (index 0x%lx).", index); |
| 2546 | nr_free -= PAGE_CACHE_SIZE * 8; |
| 2547 | continue; |
| 2548 | } |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 2549 | kaddr = kmap_atomic(page, KM_USER0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | /* |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 2551 | * Subtract the number of set bits. If this |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | * is the last page and it is partial we don't really care as |
| 2553 | * it just means we do a little extra work but it won't affect |
| 2554 | * the result as all out of range bytes are set to zero by |
| 2555 | * ntfs_readpage(). |
| 2556 | */ |
Akinobu Mita | c4af964 | 2010-03-15 00:35:00 -0400 | [diff] [blame] | 2557 | nr_free -= bitmap_weight(kaddr, |
| 2558 | PAGE_CACHE_SIZE * BITS_PER_BYTE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2559 | kunmap_atomic(kaddr, KM_USER0); |
| 2560 | page_cache_release(page); |
| 2561 | } |
| 2562 | ntfs_debug("Finished reading $MFT/$BITMAP, last index = 0x%lx.", |
| 2563 | index - 1); |
| 2564 | /* If errors occured we may well have gone below zero, fix this. */ |
| 2565 | if (nr_free < 0) |
| 2566 | nr_free = 0; |
| 2567 | ntfs_debug("Exiting."); |
| 2568 | return nr_free; |
| 2569 | } |
| 2570 | |
| 2571 | /** |
| 2572 | * ntfs_statfs - return information about mounted NTFS volume |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2573 | * @dentry: dentry from mounted volume |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | * @sfs: statfs structure in which to return the information |
| 2575 | * |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2576 | * Return information about the mounted NTFS volume @dentry in the statfs structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2577 | * pointed to by @sfs (this is initialized with zeros before ntfs_statfs is |
| 2578 | * called). We interpret the values to be correct of the moment in time at |
| 2579 | * which we are called. Most values are variable otherwise and this isn't just |
| 2580 | * the free values but the totals as well. For example we can increase the |
| 2581 | * total number of file nodes if we run out and we can keep doing this until |
| 2582 | * there is no more space on the volume left at all. |
| 2583 | * |
| 2584 | * Called from vfs_statfs which is used to handle the statfs, fstatfs, and |
| 2585 | * ustat system calls. |
| 2586 | * |
| 2587 | * Return 0 on success or -errno on error. |
| 2588 | */ |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2589 | static int ntfs_statfs(struct dentry *dentry, struct kstatfs *sfs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2591 | struct super_block *sb = dentry->d_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | s64 size; |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2593 | ntfs_volume *vol = NTFS_SB(sb); |
| 2594 | ntfs_inode *mft_ni = NTFS_I(vol->mft_ino); |
| 2595 | pgoff_t max_index; |
| 2596 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2597 | |
| 2598 | ntfs_debug("Entering."); |
| 2599 | /* Type of filesystem. */ |
| 2600 | sfs->f_type = NTFS_SB_MAGIC; |
| 2601 | /* Optimal transfer block size. */ |
| 2602 | sfs->f_bsize = PAGE_CACHE_SIZE; |
| 2603 | /* |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2604 | * Total data blocks in filesystem in units of f_bsize and since |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | * inodes are also stored in data blocs ($MFT is a file) this is just |
| 2606 | * the total clusters. |
| 2607 | */ |
| 2608 | sfs->f_blocks = vol->nr_clusters << vol->cluster_size_bits >> |
| 2609 | PAGE_CACHE_SHIFT; |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2610 | /* Free data blocks in filesystem in units of f_bsize. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | size = get_nr_free_clusters(vol) << vol->cluster_size_bits >> |
| 2612 | PAGE_CACHE_SHIFT; |
| 2613 | if (size < 0LL) |
| 2614 | size = 0LL; |
| 2615 | /* Free blocks avail to non-superuser, same as above on NTFS. */ |
| 2616 | sfs->f_bavail = sfs->f_bfree = size; |
| 2617 | /* Serialize accesses to the inode bitmap. */ |
| 2618 | down_read(&vol->mftbmp_lock); |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2619 | read_lock_irqsave(&mft_ni->size_lock, flags); |
| 2620 | size = i_size_read(vol->mft_ino) >> vol->mft_record_size_bits; |
| 2621 | /* |
| 2622 | * Convert the maximum number of set bits into bytes rounded up, then |
| 2623 | * convert into multiples of PAGE_CACHE_SIZE, rounding up so that if we |
| 2624 | * have one full and one partial page max_index = 2. |
| 2625 | */ |
| 2626 | max_index = ((((mft_ni->initialized_size >> vol->mft_record_size_bits) |
| 2627 | + 7) >> 3) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 2628 | read_unlock_irqrestore(&mft_ni->size_lock, flags); |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2629 | /* Number of inodes in filesystem (at this point in time). */ |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2630 | sfs->f_files = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | /* Free inodes in fs (based on current total count). */ |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2632 | sfs->f_ffree = __get_nr_free_mft_records(vol, size, max_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | up_read(&vol->mftbmp_lock); |
| 2634 | /* |
| 2635 | * File system id. This is extremely *nix flavour dependent and even |
| 2636 | * within Linux itself all fs do their own thing. I interpret this to |
| 2637 | * mean a unique id associated with the mounted fs and not the id |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2638 | * associated with the filesystem driver, the latter is already given |
| 2639 | * by the filesystem type in sfs->f_type. Thus we use the 64-bit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2640 | * volume serial number splitting it into two 32-bit parts. We enter |
| 2641 | * the least significant 32-bits in f_fsid[0] and the most significant |
| 2642 | * 32-bits in f_fsid[1]. |
| 2643 | */ |
| 2644 | sfs->f_fsid.val[0] = vol->serial_no & 0xffffffff; |
| 2645 | sfs->f_fsid.val[1] = (vol->serial_no >> 32) & 0xffffffff; |
| 2646 | /* Maximum length of filenames. */ |
| 2647 | sfs->f_namelen = NTFS_MAX_NAME_LEN; |
| 2648 | return 0; |
| 2649 | } |
| 2650 | |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 2651 | #ifdef NTFS_RW |
| 2652 | static int ntfs_write_inode(struct inode *vi, struct writeback_control *wbc) |
| 2653 | { |
| 2654 | return __ntfs_write_inode(vi, wbc->sync_mode == WB_SYNC_ALL); |
| 2655 | } |
| 2656 | #endif |
| 2657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2658 | /** |
| 2659 | * The complete super operations. |
| 2660 | */ |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 2661 | static const struct super_operations ntfs_sops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | .alloc_inode = ntfs_alloc_big_inode, /* VFS: Allocate new inode. */ |
| 2663 | .destroy_inode = ntfs_destroy_big_inode, /* VFS: Deallocate inode. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2664 | #ifdef NTFS_RW |
| 2665 | //.dirty_inode = NULL, /* VFS: Called from |
| 2666 | // __mark_inode_dirty(). */ |
| 2667 | .write_inode = ntfs_write_inode, /* VFS: Write dirty inode to |
| 2668 | disk. */ |
| 2669 | //.drop_inode = NULL, /* VFS: Called just after the |
| 2670 | // inode reference count has |
| 2671 | // been decreased to zero. |
| 2672 | // NOTE: The inode lock is |
| 2673 | // held. See fs/inode.c:: |
| 2674 | // generic_drop_inode(). */ |
| 2675 | //.delete_inode = NULL, /* VFS: Delete inode from disk. |
| 2676 | // Called when i_count becomes |
| 2677 | // 0 and i_nlink is also 0. */ |
| 2678 | //.write_super = NULL, /* Flush dirty super block to |
| 2679 | // disk. */ |
| 2680 | //.sync_fs = NULL, /* ? */ |
| 2681 | //.write_super_lockfs = NULL, /* ? */ |
| 2682 | //.unlockfs = NULL, /* ? */ |
| 2683 | #endif /* NTFS_RW */ |
| 2684 | .put_super = ntfs_put_super, /* Syscall: umount. */ |
| 2685 | .statfs = ntfs_statfs, /* Syscall: statfs */ |
| 2686 | .remount_fs = ntfs_remount, /* Syscall: mount -o remount. */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 2687 | .evict_inode = ntfs_evict_big_inode, /* VFS: Called when an inode is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | removed from memory. */ |
| 2689 | //.umount_begin = NULL, /* Forced umount. */ |
| 2690 | .show_options = ntfs_show_options, /* Show mount options in |
| 2691 | proc. */ |
| 2692 | }; |
| 2693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | /** |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2695 | * ntfs_fill_super - mount an ntfs filesystem |
| 2696 | * @sb: super block of ntfs filesystem to mount |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2697 | * @opt: string containing the mount options |
| 2698 | * @silent: silence error output |
| 2699 | * |
| 2700 | * ntfs_fill_super() is called by the VFS to mount the device described by @sb |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2701 | * with the mount otions in @data with the NTFS filesystem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | * |
| 2703 | * If @silent is true, remain silent even if errors are detected. This is used |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2704 | * during bootup, when the kernel tries to mount the root filesystem with all |
| 2705 | * registered filesystems one after the other until one succeeds. This implies |
| 2706 | * that all filesystems except the correct one will quite correctly and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | * expectedly return an error, but nobody wants to see error messages when in |
| 2708 | * fact this is what is supposed to happen. |
| 2709 | * |
| 2710 | * NOTE: @sb->s_flags contains the mount options flags. |
| 2711 | */ |
| 2712 | static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent) |
| 2713 | { |
| 2714 | ntfs_volume *vol; |
| 2715 | struct buffer_head *bh; |
| 2716 | struct inode *tmp_ino; |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2717 | int blocksize, result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2718 | |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 2719 | /* |
| 2720 | * We do a pretty difficult piece of bootstrap by reading the |
| 2721 | * MFT (and other metadata) from disk into memory. We'll only |
| 2722 | * release this metadata during umount, so the locking patterns |
| 2723 | * observed during bootstrap do not count. So turn off the |
| 2724 | * observation of locking patterns (strictly for this context |
| 2725 | * only) while mounting NTFS. [The validator is still active |
| 2726 | * otherwise, even for this context: it will for example record |
| 2727 | * lock class registrations.] |
| 2728 | */ |
| 2729 | lockdep_off(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2730 | ntfs_debug("Entering."); |
| 2731 | #ifndef NTFS_RW |
Christoph Hellwig | 24a44dc | 2006-01-09 20:52:14 -0800 | [diff] [blame] | 2732 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | #endif /* ! NTFS_RW */ |
| 2734 | /* Allocate a new ntfs_volume and place it in sb->s_fs_info. */ |
| 2735 | sb->s_fs_info = kmalloc(sizeof(ntfs_volume), GFP_NOFS); |
| 2736 | vol = NTFS_SB(sb); |
| 2737 | if (!vol) { |
| 2738 | if (!silent) |
| 2739 | ntfs_error(sb, "Allocation of NTFS volume structure " |
| 2740 | "failed. Aborting mount..."); |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 2741 | lockdep_on(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2742 | return -ENOMEM; |
| 2743 | } |
| 2744 | /* Initialize ntfs_volume structure. */ |
Anton Altaparmakov | 442d207 | 2005-05-27 16:42:56 +0100 | [diff] [blame] | 2745 | *vol = (ntfs_volume) { |
| 2746 | .sb = sb, |
| 2747 | /* |
| 2748 | * Default is group and other don't have any access to files or |
| 2749 | * directories while owner has full access. Further, files by |
| 2750 | * default are not executable but directories are of course |
| 2751 | * browseable. |
| 2752 | */ |
| 2753 | .fmask = 0177, |
| 2754 | .dmask = 0077, |
| 2755 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2756 | init_rwsem(&vol->mftbmp_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | init_rwsem(&vol->lcnbmp_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2758 | |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2759 | /* By default, enable sparse support. */ |
| 2760 | NVolSetSparseEnabled(vol); |
| 2761 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | /* Important to get the mount options dealt with now. */ |
| 2763 | if (!parse_options(vol, (char*)opt)) |
| 2764 | goto err_out_now; |
| 2765 | |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2766 | /* We support sector sizes up to the PAGE_CACHE_SIZE. */ |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 2767 | if (bdev_logical_block_size(sb->s_bdev) > PAGE_CACHE_SIZE) { |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2768 | if (!silent) |
| 2769 | ntfs_error(sb, "Device has unsupported sector size " |
| 2770 | "(%i). The maximum supported sector " |
| 2771 | "size on this architecture is %lu " |
| 2772 | "bytes.", |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 2773 | bdev_logical_block_size(sb->s_bdev), |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2774 | PAGE_CACHE_SIZE); |
| 2775 | goto err_out_now; |
| 2776 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2777 | /* |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2778 | * Setup the device access block size to NTFS_BLOCK_SIZE or the hard |
| 2779 | * sector size, whichever is bigger. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2780 | */ |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2781 | blocksize = sb_min_blocksize(sb, NTFS_BLOCK_SIZE); |
| 2782 | if (blocksize < NTFS_BLOCK_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2783 | if (!silent) |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2784 | ntfs_error(sb, "Unable to set device block size."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2785 | goto err_out_now; |
| 2786 | } |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2787 | BUG_ON(blocksize != sb->s_blocksize); |
| 2788 | ntfs_debug("Set device block size to %i bytes (block size bits %i).", |
| 2789 | blocksize, sb->s_blocksize_bits); |
| 2790 | /* Determine the size of the device in units of block_size bytes. */ |
| 2791 | if (!i_size_read(sb->s_bdev->bd_inode)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2792 | if (!silent) |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2793 | ntfs_error(sb, "Unable to determine device size."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | goto err_out_now; |
| 2795 | } |
Anton Altaparmakov | 218357f | 2004-11-18 20:34:59 +0000 | [diff] [blame] | 2796 | vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >> |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2797 | sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | /* Read the boot sector and return unlocked buffer head to it. */ |
| 2799 | if (!(bh = read_ntfs_boot_sector(sb, silent))) { |
| 2800 | if (!silent) |
| 2801 | ntfs_error(sb, "Not an NTFS volume."); |
| 2802 | goto err_out_now; |
| 2803 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2804 | /* |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2805 | * Extract the data from the boot sector and setup the ntfs volume |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | * using it. |
| 2807 | */ |
| 2808 | result = parse_ntfs_boot_sector(vol, (NTFS_BOOT_SECTOR*)bh->b_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2809 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2810 | if (!result) { |
| 2811 | if (!silent) |
| 2812 | ntfs_error(sb, "Unsupported NTFS filesystem."); |
| 2813 | goto err_out_now; |
| 2814 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2815 | /* |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2816 | * If the boot sector indicates a sector size bigger than the current |
| 2817 | * device block size, switch the device block size to the sector size. |
| 2818 | * TODO: It may be possible to support this case even when the set |
| 2819 | * below fails, we would just be breaking up the i/o for each sector |
| 2820 | * into multiple blocks for i/o purposes but otherwise it should just |
| 2821 | * work. However it is safer to leave disabled until someone hits this |
| 2822 | * error message and then we can get them to try it without the setting |
| 2823 | * so we know for sure that it works. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | */ |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2825 | if (vol->sector_size > blocksize) { |
| 2826 | blocksize = sb_set_blocksize(sb, vol->sector_size); |
| 2827 | if (blocksize != vol->sector_size) { |
| 2828 | if (!silent) |
| 2829 | ntfs_error(sb, "Unable to set device block " |
| 2830 | "size to sector size (%i).", |
| 2831 | vol->sector_size); |
| 2832 | goto err_out_now; |
| 2833 | } |
| 2834 | BUG_ON(blocksize != sb->s_blocksize); |
| 2835 | vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >> |
| 2836 | sb->s_blocksize_bits; |
| 2837 | ntfs_debug("Changed device block size to %i bytes (block size " |
| 2838 | "bits %i) to match volume sector size.", |
| 2839 | blocksize, sb->s_blocksize_bits); |
| 2840 | } |
| 2841 | /* Initialize the cluster and mft allocators. */ |
| 2842 | ntfs_setup_allocators(vol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2843 | /* Setup remaining fields in the super block. */ |
| 2844 | sb->s_magic = NTFS_SB_MAGIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | /* |
| 2846 | * Ntfs allows 63 bits for the file size, i.e. correct would be: |
| 2847 | * sb->s_maxbytes = ~0ULL >> 1; |
| 2848 | * But the kernel uses a long as the page cache page index which on |
| 2849 | * 32-bit architectures is only 32-bits. MAX_LFS_FILESIZE is kernel |
| 2850 | * defined to the maximum the page cache page index can cope with |
| 2851 | * without overflowing the index or to 2^63 - 1, whichever is smaller. |
| 2852 | */ |
| 2853 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
Anton Altaparmakov | 78af34f | 2006-02-24 10:32:33 +0000 | [diff] [blame] | 2854 | /* Ntfs measures time in 100ns intervals. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2855 | sb->s_time_gran = 100; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2856 | /* |
| 2857 | * Now load the metadata required for the page cache and our address |
| 2858 | * space operations to function. We do this by setting up a specialised |
| 2859 | * read_inode method and then just calling the normal iget() to obtain |
| 2860 | * the inode for $MFT which is sufficient to allow our normal inode |
| 2861 | * operations and associated address space operations to function. |
| 2862 | */ |
| 2863 | sb->s_op = &ntfs_sops; |
| 2864 | tmp_ino = new_inode(sb); |
| 2865 | if (!tmp_ino) { |
| 2866 | if (!silent) |
| 2867 | ntfs_error(sb, "Failed to load essential metadata."); |
| 2868 | goto err_out_now; |
| 2869 | } |
| 2870 | tmp_ino->i_ino = FILE_MFT; |
| 2871 | insert_inode_hash(tmp_ino); |
| 2872 | if (ntfs_read_inode_mount(tmp_ino) < 0) { |
| 2873 | if (!silent) |
| 2874 | ntfs_error(sb, "Failed to load essential metadata."); |
| 2875 | goto iput_tmp_ino_err_out_now; |
| 2876 | } |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2877 | mutex_lock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2878 | /* |
| 2879 | * The current mount is a compression user if the cluster size is |
| 2880 | * less than or equal 4kiB. |
| 2881 | */ |
| 2882 | if (vol->cluster_size <= 4096 && !ntfs_nr_compression_users++) { |
| 2883 | result = allocate_compression_buffers(); |
| 2884 | if (result) { |
| 2885 | ntfs_error(NULL, "Failed to allocate buffers " |
| 2886 | "for compression engine."); |
| 2887 | ntfs_nr_compression_users--; |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2888 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2889 | goto iput_tmp_ino_err_out_now; |
| 2890 | } |
| 2891 | } |
| 2892 | /* |
| 2893 | * Generate the global default upcase table if necessary. Also |
| 2894 | * temporarily increment the number of upcase users to avoid race |
| 2895 | * conditions with concurrent (u)mounts. |
| 2896 | */ |
| 2897 | if (!default_upcase) |
| 2898 | default_upcase = generate_default_upcase(); |
| 2899 | ntfs_nr_upcase_users++; |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2900 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | /* |
| 2902 | * From now on, ignore @silent parameter. If we fail below this line, |
| 2903 | * it will be due to a corrupt fs or a system error, so we report it. |
| 2904 | */ |
| 2905 | /* |
| 2906 | * Open the system files with normal access functions and complete |
| 2907 | * setting up the ntfs super block. |
| 2908 | */ |
| 2909 | if (!load_system_files(vol)) { |
| 2910 | ntfs_error(sb, "Failed to load system files."); |
| 2911 | goto unl_upcase_iput_tmp_ino_err_out_now; |
| 2912 | } |
| 2913 | if ((sb->s_root = d_alloc_root(vol->root_ino))) { |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame^] | 2914 | /* We grab a reference, simulating an ntfs_iget(). */ |
| 2915 | ihold(vol->root_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2916 | ntfs_debug("Exiting, status successful."); |
| 2917 | /* Release the default upcase if it has no users. */ |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2918 | mutex_lock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2919 | if (!--ntfs_nr_upcase_users && default_upcase) { |
| 2920 | ntfs_free(default_upcase); |
| 2921 | default_upcase = NULL; |
| 2922 | } |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2923 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2924 | sb->s_export_op = &ntfs_export_ops; |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 2925 | lockdep_on(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2926 | return 0; |
| 2927 | } |
| 2928 | ntfs_error(sb, "Failed to allocate root directory."); |
| 2929 | /* Clean up after the successful load_system_files() call from above. */ |
| 2930 | // TODO: Use ntfs_put_super() instead of repeating all this code... |
| 2931 | // FIXME: Should mark the volume clean as the error is most likely |
| 2932 | // -ENOMEM. |
| 2933 | iput(vol->vol_ino); |
| 2934 | vol->vol_ino = NULL; |
| 2935 | /* NTFS 3.0+ specific clean up. */ |
| 2936 | if (vol->major_ver >= 3) { |
| 2937 | #ifdef NTFS_RW |
Anton Altaparmakov | 3f2faef | 2005-06-25 15:28:56 +0100 | [diff] [blame] | 2938 | if (vol->usnjrnl_j_ino) { |
| 2939 | iput(vol->usnjrnl_j_ino); |
| 2940 | vol->usnjrnl_j_ino = NULL; |
| 2941 | } |
| 2942 | if (vol->usnjrnl_max_ino) { |
| 2943 | iput(vol->usnjrnl_max_ino); |
| 2944 | vol->usnjrnl_max_ino = NULL; |
| 2945 | } |
| 2946 | if (vol->usnjrnl_ino) { |
| 2947 | iput(vol->usnjrnl_ino); |
| 2948 | vol->usnjrnl_ino = NULL; |
| 2949 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2950 | if (vol->quota_q_ino) { |
| 2951 | iput(vol->quota_q_ino); |
| 2952 | vol->quota_q_ino = NULL; |
| 2953 | } |
| 2954 | if (vol->quota_ino) { |
| 2955 | iput(vol->quota_ino); |
| 2956 | vol->quota_ino = NULL; |
| 2957 | } |
| 2958 | #endif /* NTFS_RW */ |
| 2959 | if (vol->extend_ino) { |
| 2960 | iput(vol->extend_ino); |
| 2961 | vol->extend_ino = NULL; |
| 2962 | } |
| 2963 | if (vol->secure_ino) { |
| 2964 | iput(vol->secure_ino); |
| 2965 | vol->secure_ino = NULL; |
| 2966 | } |
| 2967 | } |
| 2968 | iput(vol->root_ino); |
| 2969 | vol->root_ino = NULL; |
| 2970 | iput(vol->lcnbmp_ino); |
| 2971 | vol->lcnbmp_ino = NULL; |
| 2972 | iput(vol->mftbmp_ino); |
| 2973 | vol->mftbmp_ino = NULL; |
| 2974 | #ifdef NTFS_RW |
| 2975 | if (vol->logfile_ino) { |
| 2976 | iput(vol->logfile_ino); |
| 2977 | vol->logfile_ino = NULL; |
| 2978 | } |
| 2979 | if (vol->mftmirr_ino) { |
| 2980 | iput(vol->mftmirr_ino); |
| 2981 | vol->mftmirr_ino = NULL; |
| 2982 | } |
| 2983 | #endif /* NTFS_RW */ |
| 2984 | /* Throw away the table of attribute definitions. */ |
| 2985 | vol->attrdef_size = 0; |
| 2986 | if (vol->attrdef) { |
| 2987 | ntfs_free(vol->attrdef); |
| 2988 | vol->attrdef = NULL; |
| 2989 | } |
| 2990 | vol->upcase_len = 0; |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2991 | mutex_lock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2992 | if (vol->upcase == default_upcase) { |
| 2993 | ntfs_nr_upcase_users--; |
| 2994 | vol->upcase = NULL; |
| 2995 | } |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 2996 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2997 | if (vol->upcase) { |
| 2998 | ntfs_free(vol->upcase); |
| 2999 | vol->upcase = NULL; |
| 3000 | } |
| 3001 | if (vol->nls_map) { |
| 3002 | unload_nls(vol->nls_map); |
| 3003 | vol->nls_map = NULL; |
| 3004 | } |
| 3005 | /* Error exit code path. */ |
| 3006 | unl_upcase_iput_tmp_ino_err_out_now: |
| 3007 | /* |
| 3008 | * Decrease the number of upcase users and destroy the global default |
| 3009 | * upcase table if necessary. |
| 3010 | */ |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 3011 | mutex_lock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | if (!--ntfs_nr_upcase_users && default_upcase) { |
| 3013 | ntfs_free(default_upcase); |
| 3014 | default_upcase = NULL; |
| 3015 | } |
| 3016 | if (vol->cluster_size <= 4096 && !--ntfs_nr_compression_users) |
| 3017 | free_compression_buffers(); |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 3018 | mutex_unlock(&ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3019 | iput_tmp_ino_err_out_now: |
| 3020 | iput(tmp_ino); |
| 3021 | if (vol->mft_ino && vol->mft_ino != tmp_ino) |
| 3022 | iput(vol->mft_ino); |
| 3023 | vol->mft_ino = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3024 | /* Errors at this stage are irrelevant. */ |
| 3025 | err_out_now: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3026 | sb->s_fs_info = NULL; |
| 3027 | kfree(vol); |
| 3028 | ntfs_debug("Failed, returning -EINVAL."); |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 3029 | lockdep_on(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | return -EINVAL; |
| 3031 | } |
| 3032 | |
| 3033 | /* |
| 3034 | * This is a slab cache to optimize allocations and deallocations of Unicode |
| 3035 | * strings of the maximum length allowed by NTFS, which is NTFS_MAX_NAME_LEN |
| 3036 | * (255) Unicode characters + a terminating NULL Unicode character. |
| 3037 | */ |
Pekka Enberg | 64419d9 | 2006-02-05 21:43:57 +0000 | [diff] [blame] | 3038 | struct kmem_cache *ntfs_name_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3039 | |
Anton Altaparmakov | 7fafb8b | 2005-04-06 16:09:21 +0100 | [diff] [blame] | 3040 | /* Slab caches for efficient allocation/deallocation of inodes. */ |
Pekka Enberg | 64419d9 | 2006-02-05 21:43:57 +0000 | [diff] [blame] | 3041 | struct kmem_cache *ntfs_inode_cache; |
| 3042 | struct kmem_cache *ntfs_big_inode_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3043 | |
| 3044 | /* Init once constructor for the inode slab cache. */ |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 3045 | static void ntfs_big_inode_init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3046 | { |
| 3047 | ntfs_inode *ni = (ntfs_inode *)foo; |
| 3048 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 3049 | inode_init_once(VFS_I(ni)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3050 | } |
| 3051 | |
| 3052 | /* |
| 3053 | * Slab caches to optimize allocations and deallocations of attribute search |
| 3054 | * contexts and index contexts, respectively. |
| 3055 | */ |
Pekka Enberg | 64419d9 | 2006-02-05 21:43:57 +0000 | [diff] [blame] | 3056 | struct kmem_cache *ntfs_attr_ctx_cache; |
| 3057 | struct kmem_cache *ntfs_index_ctx_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3058 | |
Anton Altaparmakov | e750d1c | 2006-03-23 17:04:12 +0000 | [diff] [blame] | 3059 | /* Driver wide mutex. */ |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 3060 | DEFINE_MUTEX(ntfs_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 3062 | static int ntfs_get_sb(struct file_system_type *fs_type, |
| 3063 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 3065 | return get_sb_bdev(fs_type, flags, dev_name, data, ntfs_fill_super, |
| 3066 | mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3067 | } |
| 3068 | |
| 3069 | static struct file_system_type ntfs_fs_type = { |
| 3070 | .owner = THIS_MODULE, |
| 3071 | .name = "ntfs", |
| 3072 | .get_sb = ntfs_get_sb, |
| 3073 | .kill_sb = kill_block_super, |
| 3074 | .fs_flags = FS_REQUIRES_DEV, |
| 3075 | }; |
| 3076 | |
| 3077 | /* Stable names for the slab caches. */ |
| 3078 | static const char ntfs_index_ctx_cache_name[] = "ntfs_index_ctx_cache"; |
| 3079 | static const char ntfs_attr_ctx_cache_name[] = "ntfs_attr_ctx_cache"; |
| 3080 | static const char ntfs_name_cache_name[] = "ntfs_name_cache"; |
| 3081 | static const char ntfs_inode_cache_name[] = "ntfs_inode_cache"; |
| 3082 | static const char ntfs_big_inode_cache_name[] = "ntfs_big_inode_cache"; |
| 3083 | |
| 3084 | static int __init init_ntfs_fs(void) |
| 3085 | { |
| 3086 | int err = 0; |
| 3087 | |
| 3088 | /* This may be ugly but it results in pretty output so who cares. (-8 */ |
| 3089 | printk(KERN_INFO "NTFS driver " NTFS_VERSION " [Flags: R/" |
| 3090 | #ifdef NTFS_RW |
| 3091 | "W" |
| 3092 | #else |
| 3093 | "O" |
| 3094 | #endif |
| 3095 | #ifdef DEBUG |
| 3096 | " DEBUG" |
| 3097 | #endif |
| 3098 | #ifdef MODULE |
| 3099 | " MODULE" |
| 3100 | #endif |
| 3101 | "].\n"); |
| 3102 | |
| 3103 | ntfs_debug("Debug messages are enabled."); |
| 3104 | |
| 3105 | ntfs_index_ctx_cache = kmem_cache_create(ntfs_index_ctx_cache_name, |
| 3106 | sizeof(ntfs_index_context), 0 /* offset */, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 3107 | SLAB_HWCACHE_ALIGN, NULL /* ctor */); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3108 | if (!ntfs_index_ctx_cache) { |
| 3109 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", |
| 3110 | ntfs_index_ctx_cache_name); |
| 3111 | goto ictx_err_out; |
| 3112 | } |
| 3113 | ntfs_attr_ctx_cache = kmem_cache_create(ntfs_attr_ctx_cache_name, |
| 3114 | sizeof(ntfs_attr_search_ctx), 0 /* offset */, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 3115 | SLAB_HWCACHE_ALIGN, NULL /* ctor */); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3116 | if (!ntfs_attr_ctx_cache) { |
| 3117 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", |
| 3118 | ntfs_attr_ctx_cache_name); |
| 3119 | goto actx_err_out; |
| 3120 | } |
| 3121 | |
| 3122 | ntfs_name_cache = kmem_cache_create(ntfs_name_cache_name, |
| 3123 | (NTFS_MAX_NAME_LEN+1) * sizeof(ntfschar), 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 3124 | SLAB_HWCACHE_ALIGN, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3125 | if (!ntfs_name_cache) { |
| 3126 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", |
| 3127 | ntfs_name_cache_name); |
| 3128 | goto name_err_out; |
| 3129 | } |
| 3130 | |
| 3131 | ntfs_inode_cache = kmem_cache_create(ntfs_inode_cache_name, |
| 3132 | sizeof(ntfs_inode), 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 3133 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3134 | if (!ntfs_inode_cache) { |
| 3135 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", |
| 3136 | ntfs_inode_cache_name); |
| 3137 | goto inode_err_out; |
| 3138 | } |
| 3139 | |
| 3140 | ntfs_big_inode_cache = kmem_cache_create(ntfs_big_inode_cache_name, |
| 3141 | sizeof(big_ntfs_inode), 0, |
Paul Jackson | 4b6a931 | 2006-03-24 03:16:05 -0800 | [diff] [blame] | 3142 | SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 3143 | ntfs_big_inode_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3144 | if (!ntfs_big_inode_cache) { |
| 3145 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", |
| 3146 | ntfs_big_inode_cache_name); |
| 3147 | goto big_inode_err_out; |
| 3148 | } |
| 3149 | |
| 3150 | /* Register the ntfs sysctls. */ |
| 3151 | err = ntfs_sysctl(1); |
| 3152 | if (err) { |
| 3153 | printk(KERN_CRIT "NTFS: Failed to register NTFS sysctls!\n"); |
| 3154 | goto sysctl_err_out; |
| 3155 | } |
| 3156 | |
| 3157 | err = register_filesystem(&ntfs_fs_type); |
| 3158 | if (!err) { |
| 3159 | ntfs_debug("NTFS driver registered successfully."); |
| 3160 | return 0; /* Success! */ |
| 3161 | } |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 3162 | printk(KERN_CRIT "NTFS: Failed to register NTFS filesystem driver!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | |
| 3164 | sysctl_err_out: |
| 3165 | kmem_cache_destroy(ntfs_big_inode_cache); |
| 3166 | big_inode_err_out: |
| 3167 | kmem_cache_destroy(ntfs_inode_cache); |
| 3168 | inode_err_out: |
| 3169 | kmem_cache_destroy(ntfs_name_cache); |
| 3170 | name_err_out: |
| 3171 | kmem_cache_destroy(ntfs_attr_ctx_cache); |
| 3172 | actx_err_out: |
| 3173 | kmem_cache_destroy(ntfs_index_ctx_cache); |
| 3174 | ictx_err_out: |
| 3175 | if (!err) { |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 3176 | printk(KERN_CRIT "NTFS: Aborting NTFS filesystem driver " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3177 | "registration...\n"); |
| 3178 | err = -ENOMEM; |
| 3179 | } |
| 3180 | return err; |
| 3181 | } |
| 3182 | |
| 3183 | static void __exit exit_ntfs_fs(void) |
| 3184 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | ntfs_debug("Unregistering NTFS driver."); |
| 3186 | |
| 3187 | unregister_filesystem(&ntfs_fs_type); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 3188 | kmem_cache_destroy(ntfs_big_inode_cache); |
| 3189 | kmem_cache_destroy(ntfs_inode_cache); |
| 3190 | kmem_cache_destroy(ntfs_name_cache); |
| 3191 | kmem_cache_destroy(ntfs_attr_ctx_cache); |
| 3192 | kmem_cache_destroy(ntfs_index_ctx_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3193 | /* Unregister the ntfs sysctls. */ |
| 3194 | ntfs_sysctl(0); |
| 3195 | } |
| 3196 | |
| 3197 | MODULE_AUTHOR("Anton Altaparmakov <aia21@cantab.net>"); |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 3198 | MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2007 Anton Altaparmakov"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3199 | MODULE_VERSION(NTFS_VERSION); |
| 3200 | MODULE_LICENSE("GPL"); |
| 3201 | #ifdef DEBUG |
| 3202 | module_param(debug_msgs, bool, 0); |
| 3203 | MODULE_PARM_DESC(debug_msgs, "Enable debug messages."); |
| 3204 | #endif |
| 3205 | |
| 3206 | module_init(init_ntfs_fs) |
| 3207 | module_exit(exit_ntfs_fs) |