1 /* 2 * Copyright (c) 2000-2006 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 #include "xfs.h" 20 #include "xfs_shared.h" 21 #include "xfs_format.h" 22 #include "xfs_log_format.h" 23 #include "xfs_trans_resv.h" 24 #include "xfs_inum.h" 25 #include "xfs_sb.h" 26 #include "xfs_ag.h" 27 #include "xfs_mount.h" 28 #include "xfs_da_format.h" 29 #include "xfs_inode.h" 30 #include "xfs_btree.h" 31 #include "xfs_bmap.h" 32 #include "xfs_alloc.h" 33 #include "xfs_error.h" 34 #include "xfs_fsops.h" 35 #include "xfs_trans.h" 36 #include "xfs_buf_item.h" 37 #include "xfs_log.h" 38 #include "xfs_log_priv.h" 39 #include "xfs_da_btree.h" 40 #include "xfs_dir2.h" 41 #include "xfs_extfree_item.h" 42 #include "xfs_mru_cache.h" 43 #include "xfs_inode_item.h" 44 #include "xfs_icache.h" 45 #include "xfs_trace.h" 46 #include "xfs_icreate_item.h" 47 #include "xfs_dinode.h" 48 #include "xfs_filestream.h" 49 #include "xfs_quota.h" 50 51 #include <linux/namei.h> 52 #include <linux/init.h> 53 #include <linux/slab.h> 54 #include <linux/mount.h> 55 #include <linux/mempool.h> 56 #include <linux/writeback.h> 57 #include <linux/kthread.h> 58 #include <linux/freezer.h> 59 #include <linux/parser.h> 60 61 static const struct super_operations xfs_super_operations; 62 static kmem_zone_t *xfs_ioend_zone; 63 mempool_t *xfs_ioend_pool; 64 65 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ 66 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ 67 #define MNTOPT_LOGDEV "logdev" /* log device */ 68 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ 69 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ 70 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ 71 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ 72 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ 73 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ 74 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ 75 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ 76 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */ 77 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ 78 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ 79 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ 80 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ 81 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ 82 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ 83 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and 84 * unwritten extent conversion */ 85 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ 86 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ 87 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to 88 * XFS_MAXINUMBER_32 */ 89 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ 90 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ 91 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ 92 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes 93 * in stat(). */ 94 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ 95 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ 96 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */ 97 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */ 98 #define MNTOPT_NOQUOTA "noquota" /* no quotas */ 99 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */ 100 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */ 101 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */ 102 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */ 103 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */ 104 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */ 105 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */ 106 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */ 107 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */ 108 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */ 109 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */ 110 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */ 111 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */ 112 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */ 113 114 /* 115 * Table driven mount option parser. 116 * 117 * Currently only used for remount, but it will be used for mount 118 * in the future, too. 119 */ 120 enum { 121 Opt_barrier, 122 Opt_nobarrier, 123 Opt_inode64, 124 Opt_inode32, 125 Opt_err 126 }; 127 128 static const match_table_t tokens = { 129 {Opt_barrier, "barrier"}, 130 {Opt_nobarrier, "nobarrier"}, 131 {Opt_inode64, "inode64"}, 132 {Opt_inode32, "inode32"}, 133 {Opt_err, NULL} 134 }; 135 136 137 STATIC unsigned long 138 suffix_kstrtoint(char *s, unsigned int base, int *res) 139 { 140 int last, shift_left_factor = 0, _res; 141 char *value = s; 142 143 last = strlen(value) - 1; 144 if (value[last] == 'K' || value[last] == 'k') { 145 shift_left_factor = 10; 146 value[last] = '\0'; 147 } 148 if (value[last] == 'M' || value[last] == 'm') { 149 shift_left_factor = 20; 150 value[last] = '\0'; 151 } 152 if (value[last] == 'G' || value[last] == 'g') { 153 shift_left_factor = 30; 154 value[last] = '\0'; 155 } 156 157 if (kstrtoint(s, base, &_res)) 158 return -EINVAL; 159 *res = _res << shift_left_factor; 160 return 0; 161 } 162 163 /* 164 * This function fills in xfs_mount_t fields based on mount args. 165 * Note: the superblock has _not_ yet been read in. 166 * 167 * Note that this function leaks the various device name allocations on 168 * failure. The caller takes care of them. 169 */ 170 STATIC int 171 xfs_parseargs( 172 struct xfs_mount *mp, 173 char *options) 174 { 175 struct super_block *sb = mp->m_super; 176 char *this_char, *value; 177 int dsunit = 0; 178 int dswidth = 0; 179 int iosize = 0; 180 __uint8_t iosizelog = 0; 181 182 /* 183 * set up the mount name first so all the errors will refer to the 184 * correct device. 185 */ 186 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); 187 if (!mp->m_fsname) 188 return ENOMEM; 189 mp->m_fsname_len = strlen(mp->m_fsname) + 1; 190 191 /* 192 * Copy binary VFS mount flags we are interested in. 193 */ 194 if (sb->s_flags & MS_RDONLY) 195 mp->m_flags |= XFS_MOUNT_RDONLY; 196 if (sb->s_flags & MS_DIRSYNC) 197 mp->m_flags |= XFS_MOUNT_DIRSYNC; 198 if (sb->s_flags & MS_SYNCHRONOUS) 199 mp->m_flags |= XFS_MOUNT_WSYNC; 200 201 /* 202 * Set some default flags that could be cleared by the mount option 203 * parsing. 204 */ 205 mp->m_flags |= XFS_MOUNT_BARRIER; 206 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 207 #if !XFS_BIG_INUMS 208 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 209 #endif 210 211 /* 212 * These can be overridden by the mount option parsing. 213 */ 214 mp->m_logbufs = -1; 215 mp->m_logbsize = -1; 216 217 if (!options) 218 goto done; 219 220 while ((this_char = strsep(&options, ",")) != NULL) { 221 if (!*this_char) 222 continue; 223 if ((value = strchr(this_char, '=')) != NULL) 224 *value++ = 0; 225 226 if (!strcmp(this_char, MNTOPT_LOGBUFS)) { 227 if (!value || !*value) { 228 xfs_warn(mp, "%s option requires an argument", 229 this_char); 230 return EINVAL; 231 } 232 if (kstrtoint(value, 10, &mp->m_logbufs)) 233 return EINVAL; 234 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { 235 if (!value || !*value) { 236 xfs_warn(mp, "%s option requires an argument", 237 this_char); 238 return EINVAL; 239 } 240 if (suffix_kstrtoint(value, 10, &mp->m_logbsize)) 241 return EINVAL; 242 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { 243 if (!value || !*value) { 244 xfs_warn(mp, "%s option requires an argument", 245 this_char); 246 return EINVAL; 247 } 248 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 249 if (!mp->m_logname) 250 return ENOMEM; 251 } else if (!strcmp(this_char, MNTOPT_MTPT)) { 252 xfs_warn(mp, "%s option not allowed on this system", 253 this_char); 254 return EINVAL; 255 } else if (!strcmp(this_char, MNTOPT_RTDEV)) { 256 if (!value || !*value) { 257 xfs_warn(mp, "%s option requires an argument", 258 this_char); 259 return EINVAL; 260 } 261 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 262 if (!mp->m_rtname) 263 return ENOMEM; 264 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { 265 if (!value || !*value) { 266 xfs_warn(mp, "%s option requires an argument", 267 this_char); 268 return EINVAL; 269 } 270 if (kstrtoint(value, 10, &iosize)) 271 return EINVAL; 272 iosizelog = ffs(iosize) - 1; 273 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { 274 if (!value || !*value) { 275 xfs_warn(mp, "%s option requires an argument", 276 this_char); 277 return EINVAL; 278 } 279 if (suffix_kstrtoint(value, 10, &iosize)) 280 return EINVAL; 281 iosizelog = ffs(iosize) - 1; 282 } else if (!strcmp(this_char, MNTOPT_GRPID) || 283 !strcmp(this_char, MNTOPT_BSDGROUPS)) { 284 mp->m_flags |= XFS_MOUNT_GRPID; 285 } else if (!strcmp(this_char, MNTOPT_NOGRPID) || 286 !strcmp(this_char, MNTOPT_SYSVGROUPS)) { 287 mp->m_flags &= ~XFS_MOUNT_GRPID; 288 } else if (!strcmp(this_char, MNTOPT_WSYNC)) { 289 mp->m_flags |= XFS_MOUNT_WSYNC; 290 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { 291 mp->m_flags |= XFS_MOUNT_NORECOVERY; 292 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { 293 mp->m_flags |= XFS_MOUNT_NOALIGN; 294 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { 295 mp->m_flags |= XFS_MOUNT_SWALLOC; 296 } else if (!strcmp(this_char, MNTOPT_SUNIT)) { 297 if (!value || !*value) { 298 xfs_warn(mp, "%s option requires an argument", 299 this_char); 300 return EINVAL; 301 } 302 if (kstrtoint(value, 10, &dsunit)) 303 return EINVAL; 304 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { 305 if (!value || !*value) { 306 xfs_warn(mp, "%s option requires an argument", 307 this_char); 308 return EINVAL; 309 } 310 if (kstrtoint(value, 10, &dswidth)) 311 return EINVAL; 312 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) { 313 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 314 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { 315 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 316 #if !XFS_BIG_INUMS 317 xfs_warn(mp, "%s option not allowed on this system", 318 this_char); 319 return EINVAL; 320 #endif 321 } else if (!strcmp(this_char, MNTOPT_NOUUID)) { 322 mp->m_flags |= XFS_MOUNT_NOUUID; 323 } else if (!strcmp(this_char, MNTOPT_BARRIER)) { 324 mp->m_flags |= XFS_MOUNT_BARRIER; 325 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { 326 mp->m_flags &= ~XFS_MOUNT_BARRIER; 327 } else if (!strcmp(this_char, MNTOPT_IKEEP)) { 328 mp->m_flags |= XFS_MOUNT_IKEEP; 329 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { 330 mp->m_flags &= ~XFS_MOUNT_IKEEP; 331 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { 332 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; 333 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { 334 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 335 } else if (!strcmp(this_char, MNTOPT_ATTR2)) { 336 mp->m_flags |= XFS_MOUNT_ATTR2; 337 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { 338 mp->m_flags &= ~XFS_MOUNT_ATTR2; 339 mp->m_flags |= XFS_MOUNT_NOATTR2; 340 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) { 341 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 342 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) { 343 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 344 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 345 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 346 } else if (!strcmp(this_char, MNTOPT_QUOTA) || 347 !strcmp(this_char, MNTOPT_UQUOTA) || 348 !strcmp(this_char, MNTOPT_USRQUOTA)) { 349 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 350 XFS_UQUOTA_ENFD); 351 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) || 352 !strcmp(this_char, MNTOPT_UQUOTANOENF)) { 353 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 354 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 355 } else if (!strcmp(this_char, MNTOPT_PQUOTA) || 356 !strcmp(this_char, MNTOPT_PRJQUOTA)) { 357 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 358 XFS_PQUOTA_ENFD); 359 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) { 360 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 361 mp->m_qflags &= ~XFS_PQUOTA_ENFD; 362 } else if (!strcmp(this_char, MNTOPT_GQUOTA) || 363 !strcmp(this_char, MNTOPT_GRPQUOTA)) { 364 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 365 XFS_GQUOTA_ENFD); 366 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) { 367 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 368 mp->m_qflags &= ~XFS_GQUOTA_ENFD; 369 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { 370 xfs_warn(mp, 371 "delaylog is the default now, option is deprecated."); 372 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { 373 xfs_warn(mp, 374 "nodelaylog support has been removed, option is deprecated."); 375 } else if (!strcmp(this_char, MNTOPT_DISCARD)) { 376 mp->m_flags |= XFS_MOUNT_DISCARD; 377 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) { 378 mp->m_flags &= ~XFS_MOUNT_DISCARD; 379 } else if (!strcmp(this_char, "ihashsize")) { 380 xfs_warn(mp, 381 "ihashsize no longer used, option is deprecated."); 382 } else if (!strcmp(this_char, "osyncisdsync")) { 383 xfs_warn(mp, 384 "osyncisdsync has no effect, option is deprecated."); 385 } else if (!strcmp(this_char, "osyncisosync")) { 386 xfs_warn(mp, 387 "osyncisosync has no effect, option is deprecated."); 388 } else if (!strcmp(this_char, "irixsgid")) { 389 xfs_warn(mp, 390 "irixsgid is now a sysctl(2) variable, option is deprecated."); 391 } else { 392 xfs_warn(mp, "unknown mount option [%s].", this_char); 393 return EINVAL; 394 } 395 } 396 397 /* 398 * no recovery flag requires a read-only mount 399 */ 400 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 401 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 402 xfs_warn(mp, "no-recovery mounts must be read-only."); 403 return EINVAL; 404 } 405 406 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { 407 xfs_warn(mp, 408 "sunit and swidth options incompatible with the noalign option"); 409 return EINVAL; 410 } 411 412 #ifndef CONFIG_XFS_QUOTA 413 if (XFS_IS_QUOTA_RUNNING(mp)) { 414 xfs_warn(mp, "quota support not available in this kernel."); 415 return EINVAL; 416 } 417 #endif 418 419 if ((dsunit && !dswidth) || (!dsunit && dswidth)) { 420 xfs_warn(mp, "sunit and swidth must be specified together"); 421 return EINVAL; 422 } 423 424 if (dsunit && (dswidth % dsunit != 0)) { 425 xfs_warn(mp, 426 "stripe width (%d) must be a multiple of the stripe unit (%d)", 427 dswidth, dsunit); 428 return EINVAL; 429 } 430 431 done: 432 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) { 433 /* 434 * At this point the superblock has not been read 435 * in, therefore we do not know the block size. 436 * Before the mount call ends we will convert 437 * these to FSBs. 438 */ 439 mp->m_dalign = dsunit; 440 mp->m_swidth = dswidth; 441 } 442 443 if (mp->m_logbufs != -1 && 444 mp->m_logbufs != 0 && 445 (mp->m_logbufs < XLOG_MIN_ICLOGS || 446 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 447 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 448 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 449 return XFS_ERROR(EINVAL); 450 } 451 if (mp->m_logbsize != -1 && 452 mp->m_logbsize != 0 && 453 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 454 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 455 !is_power_of_2(mp->m_logbsize))) { 456 xfs_warn(mp, 457 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 458 mp->m_logbsize); 459 return XFS_ERROR(EINVAL); 460 } 461 462 if (iosizelog) { 463 if (iosizelog > XFS_MAX_IO_LOG || 464 iosizelog < XFS_MIN_IO_LOG) { 465 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 466 iosizelog, XFS_MIN_IO_LOG, 467 XFS_MAX_IO_LOG); 468 return XFS_ERROR(EINVAL); 469 } 470 471 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; 472 mp->m_readio_log = iosizelog; 473 mp->m_writeio_log = iosizelog; 474 } 475 476 return 0; 477 } 478 479 struct proc_xfs_info { 480 int flag; 481 char *str; 482 }; 483 484 STATIC int 485 xfs_showargs( 486 struct xfs_mount *mp, 487 struct seq_file *m) 488 { 489 static struct proc_xfs_info xfs_info_set[] = { 490 /* the few simple ones we can get from the mount struct */ 491 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP }, 492 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, 493 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, 494 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, 495 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, 496 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, 497 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 }, 498 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM }, 499 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID }, 500 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD }, 501 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE }, 502 { 0, NULL } 503 }; 504 static struct proc_xfs_info xfs_info_unset[] = { 505 /* the few simple ones we can get from the mount struct */ 506 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO }, 507 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER }, 508 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE }, 509 { 0, NULL } 510 }; 511 struct proc_xfs_info *xfs_infop; 512 513 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 514 if (mp->m_flags & xfs_infop->flag) 515 seq_puts(m, xfs_infop->str); 516 } 517 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { 518 if (!(mp->m_flags & xfs_infop->flag)) 519 seq_puts(m, xfs_infop->str); 520 } 521 522 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) 523 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk", 524 (int)(1 << mp->m_writeio_log) >> 10); 525 526 if (mp->m_logbufs > 0) 527 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); 528 if (mp->m_logbsize > 0) 529 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); 530 531 if (mp->m_logname) 532 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); 533 if (mp->m_rtname) 534 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); 535 536 if (mp->m_dalign > 0) 537 seq_printf(m, "," MNTOPT_SUNIT "=%d", 538 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 539 if (mp->m_swidth > 0) 540 seq_printf(m, "," MNTOPT_SWIDTH "=%d", 541 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 542 543 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) 544 seq_puts(m, "," MNTOPT_USRQUOTA); 545 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 546 seq_puts(m, "," MNTOPT_UQUOTANOENF); 547 548 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 549 if (mp->m_qflags & XFS_PQUOTA_ENFD) 550 seq_puts(m, "," MNTOPT_PRJQUOTA); 551 else 552 seq_puts(m, "," MNTOPT_PQUOTANOENF); 553 } 554 if (mp->m_qflags & XFS_GQUOTA_ACCT) { 555 if (mp->m_qflags & XFS_GQUOTA_ENFD) 556 seq_puts(m, "," MNTOPT_GRPQUOTA); 557 else 558 seq_puts(m, "," MNTOPT_GQUOTANOENF); 559 } 560 561 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 562 seq_puts(m, "," MNTOPT_NOQUOTA); 563 564 return 0; 565 } 566 __uint64_t 567 xfs_max_file_offset( 568 unsigned int blockshift) 569 { 570 unsigned int pagefactor = 1; 571 unsigned int bitshift = BITS_PER_LONG - 1; 572 573 /* Figure out maximum filesize, on Linux this can depend on 574 * the filesystem blocksize (on 32 bit platforms). 575 * __block_write_begin does this in an [unsigned] long... 576 * page->index << (PAGE_CACHE_SHIFT - bbits) 577 * So, for page sized blocks (4K on 32 bit platforms), 578 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 579 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 580 * but for smaller blocksizes it is less (bbits = log2 bsize). 581 * Note1: get_block_t takes a long (implicit cast from above) 582 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 583 * can optionally convert the [unsigned] long from above into 584 * an [unsigned] long long. 585 */ 586 587 #if BITS_PER_LONG == 32 588 # if defined(CONFIG_LBDAF) 589 ASSERT(sizeof(sector_t) == 8); 590 pagefactor = PAGE_CACHE_SIZE; 591 bitshift = BITS_PER_LONG; 592 # else 593 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 594 # endif 595 #endif 596 597 return (((__uint64_t)pagefactor) << bitshift) - 1; 598 } 599 600 xfs_agnumber_t 601 xfs_set_inode32(struct xfs_mount *mp) 602 { 603 xfs_agnumber_t index = 0; 604 xfs_agnumber_t maxagi = 0; 605 xfs_sb_t *sbp = &mp->m_sb; 606 xfs_agnumber_t max_metadata; 607 xfs_agino_t agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks -1, 0); 608 xfs_ino_t ino = XFS_AGINO_TO_INO(mp, sbp->sb_agcount -1, agino); 609 xfs_perag_t *pag; 610 611 /* Calculate how much should be reserved for inodes to meet 612 * the max inode percentage. 613 */ 614 if (mp->m_maxicount) { 615 __uint64_t icount; 616 617 icount = sbp->sb_dblocks * sbp->sb_imax_pct; 618 do_div(icount, 100); 619 icount += sbp->sb_agblocks - 1; 620 do_div(icount, sbp->sb_agblocks); 621 max_metadata = icount; 622 } else { 623 max_metadata = sbp->sb_agcount; 624 } 625 626 for (index = 0; index < sbp->sb_agcount; index++) { 627 ino = XFS_AGINO_TO_INO(mp, index, agino); 628 629 if (ino > XFS_MAXINUMBER_32) { 630 pag = xfs_perag_get(mp, index); 631 pag->pagi_inodeok = 0; 632 pag->pagf_metadata = 0; 633 xfs_perag_put(pag); 634 continue; 635 } 636 637 pag = xfs_perag_get(mp, index); 638 pag->pagi_inodeok = 1; 639 maxagi++; 640 if (index < max_metadata) 641 pag->pagf_metadata = 1; 642 xfs_perag_put(pag); 643 } 644 mp->m_flags |= (XFS_MOUNT_32BITINODES | 645 XFS_MOUNT_SMALL_INUMS); 646 647 return maxagi; 648 } 649 650 xfs_agnumber_t 651 xfs_set_inode64(struct xfs_mount *mp) 652 { 653 xfs_agnumber_t index = 0; 654 655 for (index = 0; index < mp->m_sb.sb_agcount; index++) { 656 struct xfs_perag *pag; 657 658 pag = xfs_perag_get(mp, index); 659 pag->pagi_inodeok = 1; 660 pag->pagf_metadata = 0; 661 xfs_perag_put(pag); 662 } 663 664 /* There is no need for lock protection on m_flags, 665 * the rw_semaphore of the VFS superblock is locked 666 * during mount/umount/remount operations, so this is 667 * enough to avoid concurency on the m_flags field 668 */ 669 mp->m_flags &= ~(XFS_MOUNT_32BITINODES | 670 XFS_MOUNT_SMALL_INUMS); 671 return index; 672 } 673 674 STATIC int 675 xfs_blkdev_get( 676 xfs_mount_t *mp, 677 const char *name, 678 struct block_device **bdevp) 679 { 680 int error = 0; 681 682 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 683 mp); 684 if (IS_ERR(*bdevp)) { 685 error = PTR_ERR(*bdevp); 686 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error); 687 } 688 689 return -error; 690 } 691 692 STATIC void 693 xfs_blkdev_put( 694 struct block_device *bdev) 695 { 696 if (bdev) 697 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 698 } 699 700 void 701 xfs_blkdev_issue_flush( 702 xfs_buftarg_t *buftarg) 703 { 704 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); 705 } 706 707 STATIC void 708 xfs_close_devices( 709 struct xfs_mount *mp) 710 { 711 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 712 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 713 xfs_free_buftarg(mp, mp->m_logdev_targp); 714 xfs_blkdev_put(logdev); 715 } 716 if (mp->m_rtdev_targp) { 717 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 718 xfs_free_buftarg(mp, mp->m_rtdev_targp); 719 xfs_blkdev_put(rtdev); 720 } 721 xfs_free_buftarg(mp, mp->m_ddev_targp); 722 } 723 724 /* 725 * The file system configurations are: 726 * (1) device (partition) with data and internal log 727 * (2) logical volume with data and log subvolumes. 728 * (3) logical volume with data, log, and realtime subvolumes. 729 * 730 * We only have to handle opening the log and realtime volumes here if 731 * they are present. The data subvolume has already been opened by 732 * get_sb_bdev() and is stored in sb->s_bdev. 733 */ 734 STATIC int 735 xfs_open_devices( 736 struct xfs_mount *mp) 737 { 738 struct block_device *ddev = mp->m_super->s_bdev; 739 struct block_device *logdev = NULL, *rtdev = NULL; 740 int error; 741 742 /* 743 * Open real time and log devices - order is important. 744 */ 745 if (mp->m_logname) { 746 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 747 if (error) 748 goto out; 749 } 750 751 if (mp->m_rtname) { 752 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 753 if (error) 754 goto out_close_logdev; 755 756 if (rtdev == ddev || rtdev == logdev) { 757 xfs_warn(mp, 758 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 759 error = EINVAL; 760 goto out_close_rtdev; 761 } 762 } 763 764 /* 765 * Setup xfs_mount buffer target pointers 766 */ 767 error = ENOMEM; 768 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname); 769 if (!mp->m_ddev_targp) 770 goto out_close_rtdev; 771 772 if (rtdev) { 773 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1, 774 mp->m_fsname); 775 if (!mp->m_rtdev_targp) 776 goto out_free_ddev_targ; 777 } 778 779 if (logdev && logdev != ddev) { 780 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1, 781 mp->m_fsname); 782 if (!mp->m_logdev_targp) 783 goto out_free_rtdev_targ; 784 } else { 785 mp->m_logdev_targp = mp->m_ddev_targp; 786 } 787 788 return 0; 789 790 out_free_rtdev_targ: 791 if (mp->m_rtdev_targp) 792 xfs_free_buftarg(mp, mp->m_rtdev_targp); 793 out_free_ddev_targ: 794 xfs_free_buftarg(mp, mp->m_ddev_targp); 795 out_close_rtdev: 796 if (rtdev) 797 xfs_blkdev_put(rtdev); 798 out_close_logdev: 799 if (logdev && logdev != ddev) 800 xfs_blkdev_put(logdev); 801 out: 802 return error; 803 } 804 805 /* 806 * Setup xfs_mount buffer target pointers based on superblock 807 */ 808 STATIC int 809 xfs_setup_devices( 810 struct xfs_mount *mp) 811 { 812 int error; 813 814 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize, 815 mp->m_sb.sb_sectsize); 816 if (error) 817 return error; 818 819 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 820 unsigned int log_sector_size = BBSIZE; 821 822 if (xfs_sb_version_hassector(&mp->m_sb)) 823 log_sector_size = mp->m_sb.sb_logsectsize; 824 error = xfs_setsize_buftarg(mp->m_logdev_targp, 825 mp->m_sb.sb_blocksize, 826 log_sector_size); 827 if (error) 828 return error; 829 } 830 if (mp->m_rtdev_targp) { 831 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 832 mp->m_sb.sb_blocksize, 833 mp->m_sb.sb_sectsize); 834 if (error) 835 return error; 836 } 837 838 return 0; 839 } 840 841 STATIC int 842 xfs_init_mount_workqueues( 843 struct xfs_mount *mp) 844 { 845 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", 846 WQ_MEM_RECLAIM, 0, mp->m_fsname); 847 if (!mp->m_data_workqueue) 848 goto out; 849 850 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 851 WQ_MEM_RECLAIM, 0, mp->m_fsname); 852 if (!mp->m_unwritten_workqueue) 853 goto out_destroy_data_iodone_queue; 854 855 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 856 WQ_MEM_RECLAIM, 0, mp->m_fsname); 857 if (!mp->m_cil_workqueue) 858 goto out_destroy_unwritten; 859 860 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 861 0, 0, mp->m_fsname); 862 if (!mp->m_reclaim_workqueue) 863 goto out_destroy_cil; 864 865 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", 866 0, 0, mp->m_fsname); 867 if (!mp->m_log_workqueue) 868 goto out_destroy_reclaim; 869 870 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", 871 0, 0, mp->m_fsname); 872 if (!mp->m_eofblocks_workqueue) 873 goto out_destroy_log; 874 875 return 0; 876 877 out_destroy_log: 878 destroy_workqueue(mp->m_log_workqueue); 879 out_destroy_reclaim: 880 destroy_workqueue(mp->m_reclaim_workqueue); 881 out_destroy_cil: 882 destroy_workqueue(mp->m_cil_workqueue); 883 out_destroy_unwritten: 884 destroy_workqueue(mp->m_unwritten_workqueue); 885 out_destroy_data_iodone_queue: 886 destroy_workqueue(mp->m_data_workqueue); 887 out: 888 return -ENOMEM; 889 } 890 891 STATIC void 892 xfs_destroy_mount_workqueues( 893 struct xfs_mount *mp) 894 { 895 destroy_workqueue(mp->m_eofblocks_workqueue); 896 destroy_workqueue(mp->m_log_workqueue); 897 destroy_workqueue(mp->m_reclaim_workqueue); 898 destroy_workqueue(mp->m_cil_workqueue); 899 destroy_workqueue(mp->m_data_workqueue); 900 destroy_workqueue(mp->m_unwritten_workqueue); 901 } 902 903 /* 904 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 905 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 906 * for IO to complete so that we effectively throttle multiple callers to the 907 * rate at which IO is completing. 908 */ 909 void 910 xfs_flush_inodes( 911 struct xfs_mount *mp) 912 { 913 struct super_block *sb = mp->m_super; 914 915 if (down_read_trylock(&sb->s_umount)) { 916 sync_inodes_sb(sb, jiffies); 917 up_read(&sb->s_umount); 918 } 919 } 920 921 /* Catch misguided souls that try to use this interface on XFS */ 922 STATIC struct inode * 923 xfs_fs_alloc_inode( 924 struct super_block *sb) 925 { 926 BUG(); 927 return NULL; 928 } 929 930 /* 931 * Now that the generic code is guaranteed not to be accessing 932 * the linux inode, we can reclaim the inode. 933 */ 934 STATIC void 935 xfs_fs_destroy_inode( 936 struct inode *inode) 937 { 938 struct xfs_inode *ip = XFS_I(inode); 939 940 trace_xfs_destroy_inode(ip); 941 942 XFS_STATS_INC(vn_reclaim); 943 944 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); 945 946 /* 947 * We should never get here with one of the reclaim flags already set. 948 */ 949 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); 950 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); 951 952 /* 953 * We always use background reclaim here because even if the 954 * inode is clean, it still may be under IO and hence we have 955 * to take the flush lock. The background reclaim path handles 956 * this more efficiently than we can here, so simply let background 957 * reclaim tear down all inodes. 958 */ 959 xfs_inode_set_reclaim_tag(ip); 960 } 961 962 /* 963 * Slab object creation initialisation for the XFS inode. 964 * This covers only the idempotent fields in the XFS inode; 965 * all other fields need to be initialised on allocation 966 * from the slab. This avoids the need to repeatedly initialise 967 * fields in the xfs inode that left in the initialise state 968 * when freeing the inode. 969 */ 970 STATIC void 971 xfs_fs_inode_init_once( 972 void *inode) 973 { 974 struct xfs_inode *ip = inode; 975 976 memset(ip, 0, sizeof(struct xfs_inode)); 977 978 /* vfs inode */ 979 inode_init_once(VFS_I(ip)); 980 981 /* xfs inode */ 982 atomic_set(&ip->i_pincount, 0); 983 spin_lock_init(&ip->i_flags_lock); 984 985 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 986 "xfsino", ip->i_ino); 987 } 988 989 STATIC void 990 xfs_fs_evict_inode( 991 struct inode *inode) 992 { 993 xfs_inode_t *ip = XFS_I(inode); 994 995 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); 996 997 trace_xfs_evict_inode(ip); 998 999 truncate_inode_pages(&inode->i_data, 0); 1000 clear_inode(inode); 1001 XFS_STATS_INC(vn_rele); 1002 XFS_STATS_INC(vn_remove); 1003 XFS_STATS_DEC(vn_active); 1004 1005 xfs_inactive(ip); 1006 } 1007 1008 /* 1009 * We do an unlocked check for XFS_IDONTCACHE here because we are already 1010 * serialised against cache hits here via the inode->i_lock and igrab() in 1011 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 1012 * racing with us, and it avoids needing to grab a spinlock here for every inode 1013 * we drop the final reference on. 1014 */ 1015 STATIC int 1016 xfs_fs_drop_inode( 1017 struct inode *inode) 1018 { 1019 struct xfs_inode *ip = XFS_I(inode); 1020 1021 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); 1022 } 1023 1024 STATIC void 1025 xfs_free_fsname( 1026 struct xfs_mount *mp) 1027 { 1028 kfree(mp->m_fsname); 1029 kfree(mp->m_rtname); 1030 kfree(mp->m_logname); 1031 } 1032 1033 STATIC void 1034 xfs_fs_put_super( 1035 struct super_block *sb) 1036 { 1037 struct xfs_mount *mp = XFS_M(sb); 1038 1039 xfs_filestream_unmount(mp); 1040 xfs_unmountfs(mp); 1041 1042 xfs_freesb(mp); 1043 xfs_icsb_destroy_counters(mp); 1044 xfs_destroy_mount_workqueues(mp); 1045 xfs_close_devices(mp); 1046 xfs_free_fsname(mp); 1047 kfree(mp); 1048 } 1049 1050 STATIC int 1051 xfs_fs_sync_fs( 1052 struct super_block *sb, 1053 int wait) 1054 { 1055 struct xfs_mount *mp = XFS_M(sb); 1056 1057 /* 1058 * Doing anything during the async pass would be counterproductive. 1059 */ 1060 if (!wait) 1061 return 0; 1062 1063 xfs_log_force(mp, XFS_LOG_SYNC); 1064 if (laptop_mode) { 1065 /* 1066 * The disk must be active because we're syncing. 1067 * We schedule log work now (now that the disk is 1068 * active) instead of later (when it might not be). 1069 */ 1070 flush_delayed_work(&mp->m_log->l_work); 1071 } 1072 1073 return 0; 1074 } 1075 1076 STATIC int 1077 xfs_fs_statfs( 1078 struct dentry *dentry, 1079 struct kstatfs *statp) 1080 { 1081 struct xfs_mount *mp = XFS_M(dentry->d_sb); 1082 xfs_sb_t *sbp = &mp->m_sb; 1083 struct xfs_inode *ip = XFS_I(dentry->d_inode); 1084 __uint64_t fakeinos, id; 1085 xfs_extlen_t lsize; 1086 __int64_t ffree; 1087 1088 statp->f_type = XFS_SB_MAGIC; 1089 statp->f_namelen = MAXNAMELEN - 1; 1090 1091 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 1092 statp->f_fsid.val[0] = (u32)id; 1093 statp->f_fsid.val[1] = (u32)(id >> 32); 1094 1095 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); 1096 1097 spin_lock(&mp->m_sb_lock); 1098 statp->f_bsize = sbp->sb_blocksize; 1099 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 1100 statp->f_blocks = sbp->sb_dblocks - lsize; 1101 statp->f_bfree = statp->f_bavail = 1102 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 1103 fakeinos = statp->f_bfree << sbp->sb_inopblog; 1104 statp->f_files = 1105 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 1106 if (mp->m_maxicount) 1107 statp->f_files = min_t(typeof(statp->f_files), 1108 statp->f_files, 1109 mp->m_maxicount); 1110 1111 /* make sure statp->f_ffree does not underflow */ 1112 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); 1113 statp->f_ffree = max_t(__int64_t, ffree, 0); 1114 1115 spin_unlock(&mp->m_sb_lock); 1116 1117 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1118 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 1119 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 1120 xfs_qm_statvfs(ip, statp); 1121 return 0; 1122 } 1123 1124 STATIC void 1125 xfs_save_resvblks(struct xfs_mount *mp) 1126 { 1127 __uint64_t resblks = 0; 1128 1129 mp->m_resblks_save = mp->m_resblks; 1130 xfs_reserve_blocks(mp, &resblks, NULL); 1131 } 1132 1133 STATIC void 1134 xfs_restore_resvblks(struct xfs_mount *mp) 1135 { 1136 __uint64_t resblks; 1137 1138 if (mp->m_resblks_save) { 1139 resblks = mp->m_resblks_save; 1140 mp->m_resblks_save = 0; 1141 } else 1142 resblks = xfs_default_resblks(mp); 1143 1144 xfs_reserve_blocks(mp, &resblks, NULL); 1145 } 1146 1147 /* 1148 * Trigger writeback of all the dirty metadata in the file system. 1149 * 1150 * This ensures that the metadata is written to their location on disk rather 1151 * than just existing in transactions in the log. This means after a quiesce 1152 * there is no log replay required to write the inodes to disk - this is the 1153 * primary difference between a sync and a quiesce. 1154 * 1155 * Note: xfs_log_quiesce() stops background log work - the callers must ensure 1156 * it is started again when appropriate. 1157 */ 1158 static void 1159 xfs_quiesce_attr( 1160 struct xfs_mount *mp) 1161 { 1162 int error = 0; 1163 1164 /* wait for all modifications to complete */ 1165 while (atomic_read(&mp->m_active_trans) > 0) 1166 delay(100); 1167 1168 /* force the log to unpin objects from the now complete transactions */ 1169 xfs_log_force(mp, XFS_LOG_SYNC); 1170 1171 /* reclaim inodes to do any IO before the freeze completes */ 1172 xfs_reclaim_inodes(mp, 0); 1173 xfs_reclaim_inodes(mp, SYNC_WAIT); 1174 1175 /* Push the superblock and write an unmount record */ 1176 error = xfs_log_sbcount(mp); 1177 if (error) 1178 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " 1179 "Frozen image may not be consistent."); 1180 /* 1181 * Just warn here till VFS can correctly support 1182 * read-only remount without racing. 1183 */ 1184 WARN_ON(atomic_read(&mp->m_active_trans) != 0); 1185 1186 xfs_log_quiesce(mp); 1187 } 1188 1189 STATIC int 1190 xfs_fs_remount( 1191 struct super_block *sb, 1192 int *flags, 1193 char *options) 1194 { 1195 struct xfs_mount *mp = XFS_M(sb); 1196 substring_t args[MAX_OPT_ARGS]; 1197 char *p; 1198 int error; 1199 1200 while ((p = strsep(&options, ",")) != NULL) { 1201 int token; 1202 1203 if (!*p) 1204 continue; 1205 1206 token = match_token(p, tokens, args); 1207 switch (token) { 1208 case Opt_barrier: 1209 mp->m_flags |= XFS_MOUNT_BARRIER; 1210 break; 1211 case Opt_nobarrier: 1212 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1213 break; 1214 case Opt_inode64: 1215 mp->m_maxagi = xfs_set_inode64(mp); 1216 break; 1217 case Opt_inode32: 1218 mp->m_maxagi = xfs_set_inode32(mp); 1219 break; 1220 default: 1221 /* 1222 * Logically we would return an error here to prevent 1223 * users from believing they might have changed 1224 * mount options using remount which can't be changed. 1225 * 1226 * But unfortunately mount(8) adds all options from 1227 * mtab and fstab to the mount arguments in some cases 1228 * so we can't blindly reject options, but have to 1229 * check for each specified option if it actually 1230 * differs from the currently set option and only 1231 * reject it if that's the case. 1232 * 1233 * Until that is implemented we return success for 1234 * every remount request, and silently ignore all 1235 * options that we can't actually change. 1236 */ 1237 #if 0 1238 xfs_info(mp, 1239 "mount option \"%s\" not supported for remount", p); 1240 return -EINVAL; 1241 #else 1242 break; 1243 #endif 1244 } 1245 } 1246 1247 /* ro -> rw */ 1248 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1249 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1250 1251 /* 1252 * If this is the first remount to writeable state we 1253 * might have some superblock changes to update. 1254 */ 1255 if (mp->m_update_flags) { 1256 error = xfs_mount_log_sb(mp, mp->m_update_flags); 1257 if (error) { 1258 xfs_warn(mp, "failed to write sb changes"); 1259 return error; 1260 } 1261 mp->m_update_flags = 0; 1262 } 1263 1264 /* 1265 * Fill out the reserve pool if it is empty. Use the stashed 1266 * value if it is non-zero, otherwise go with the default. 1267 */ 1268 xfs_restore_resvblks(mp); 1269 xfs_log_work_queue(mp); 1270 } 1271 1272 /* rw -> ro */ 1273 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1274 /* 1275 * Before we sync the metadata, we need to free up the reserve 1276 * block pool so that the used block count in the superblock on 1277 * disk is correct at the end of the remount. Stash the current 1278 * reserve pool size so that if we get remounted rw, we can 1279 * return it to the same size. 1280 */ 1281 xfs_save_resvblks(mp); 1282 xfs_quiesce_attr(mp); 1283 mp->m_flags |= XFS_MOUNT_RDONLY; 1284 } 1285 1286 return 0; 1287 } 1288 1289 /* 1290 * Second stage of a freeze. The data is already frozen so we only 1291 * need to take care of the metadata. Once that's done write a dummy 1292 * record to dirty the log in case of a crash while frozen. 1293 */ 1294 STATIC int 1295 xfs_fs_freeze( 1296 struct super_block *sb) 1297 { 1298 struct xfs_mount *mp = XFS_M(sb); 1299 1300 xfs_save_resvblks(mp); 1301 xfs_quiesce_attr(mp); 1302 return -xfs_fs_log_dummy(mp); 1303 } 1304 1305 STATIC int 1306 xfs_fs_unfreeze( 1307 struct super_block *sb) 1308 { 1309 struct xfs_mount *mp = XFS_M(sb); 1310 1311 xfs_restore_resvblks(mp); 1312 xfs_log_work_queue(mp); 1313 return 0; 1314 } 1315 1316 STATIC int 1317 xfs_fs_show_options( 1318 struct seq_file *m, 1319 struct dentry *root) 1320 { 1321 return -xfs_showargs(XFS_M(root->d_sb), m); 1322 } 1323 1324 /* 1325 * This function fills in xfs_mount_t fields based on mount args. 1326 * Note: the superblock _has_ now been read in. 1327 */ 1328 STATIC int 1329 xfs_finish_flags( 1330 struct xfs_mount *mp) 1331 { 1332 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1333 1334 /* Fail a mount where the logbuf is smaller than the log stripe */ 1335 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1336 if (mp->m_logbsize <= 0 && 1337 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1338 mp->m_logbsize = mp->m_sb.sb_logsunit; 1339 } else if (mp->m_logbsize > 0 && 1340 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1341 xfs_warn(mp, 1342 "logbuf size must be greater than or equal to log stripe size"); 1343 return XFS_ERROR(EINVAL); 1344 } 1345 } else { 1346 /* Fail a mount if the logbuf is larger than 32K */ 1347 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1348 xfs_warn(mp, 1349 "logbuf size for version 1 logs must be 16K or 32K"); 1350 return XFS_ERROR(EINVAL); 1351 } 1352 } 1353 1354 /* 1355 * V5 filesystems always use attr2 format for attributes. 1356 */ 1357 if (xfs_sb_version_hascrc(&mp->m_sb) && 1358 (mp->m_flags & XFS_MOUNT_NOATTR2)) { 1359 xfs_warn(mp, 1360 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.", 1361 MNTOPT_NOATTR2, MNTOPT_ATTR2); 1362 return XFS_ERROR(EINVAL); 1363 } 1364 1365 /* 1366 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1367 * told by noattr2 to turn it off 1368 */ 1369 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1370 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1371 mp->m_flags |= XFS_MOUNT_ATTR2; 1372 1373 /* 1374 * prohibit r/w mounts of read-only filesystems 1375 */ 1376 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1377 xfs_warn(mp, 1378 "cannot mount a read-only filesystem as read-write"); 1379 return XFS_ERROR(EROFS); 1380 } 1381 1382 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 1383 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && 1384 !xfs_sb_version_has_pquotino(&mp->m_sb)) { 1385 xfs_warn(mp, 1386 "Super block does not support project and group quota together"); 1387 return XFS_ERROR(EINVAL); 1388 } 1389 1390 return 0; 1391 } 1392 1393 STATIC int 1394 xfs_fs_fill_super( 1395 struct super_block *sb, 1396 void *data, 1397 int silent) 1398 { 1399 struct inode *root; 1400 struct xfs_mount *mp = NULL; 1401 int flags = 0, error = ENOMEM; 1402 1403 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1404 if (!mp) 1405 goto out; 1406 1407 spin_lock_init(&mp->m_sb_lock); 1408 mutex_init(&mp->m_growlock); 1409 atomic_set(&mp->m_active_trans, 0); 1410 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1411 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); 1412 1413 mp->m_super = sb; 1414 sb->s_fs_info = mp; 1415 1416 error = xfs_parseargs(mp, (char *)data); 1417 if (error) 1418 goto out_free_fsname; 1419 1420 sb_min_blocksize(sb, BBSIZE); 1421 sb->s_xattr = xfs_xattr_handlers; 1422 sb->s_export_op = &xfs_export_operations; 1423 #ifdef CONFIG_XFS_QUOTA 1424 sb->s_qcop = &xfs_quotactl_operations; 1425 #endif 1426 sb->s_op = &xfs_super_operations; 1427 1428 if (silent) 1429 flags |= XFS_MFSI_QUIET; 1430 1431 error = xfs_open_devices(mp); 1432 if (error) 1433 goto out_free_fsname; 1434 1435 error = xfs_init_mount_workqueues(mp); 1436 if (error) 1437 goto out_close_devices; 1438 1439 error = xfs_icsb_init_counters(mp); 1440 if (error) 1441 goto out_destroy_workqueues; 1442 1443 error = xfs_readsb(mp, flags); 1444 if (error) 1445 goto out_destroy_counters; 1446 1447 error = xfs_finish_flags(mp); 1448 if (error) 1449 goto out_free_sb; 1450 1451 error = xfs_setup_devices(mp); 1452 if (error) 1453 goto out_free_sb; 1454 1455 error = xfs_filestream_mount(mp); 1456 if (error) 1457 goto out_free_sb; 1458 1459 /* 1460 * we must configure the block size in the superblock before we run the 1461 * full mount process as the mount process can lookup and cache inodes. 1462 */ 1463 sb->s_magic = XFS_SB_MAGIC; 1464 sb->s_blocksize = mp->m_sb.sb_blocksize; 1465 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1466 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1467 sb->s_max_links = XFS_MAXLINK; 1468 sb->s_time_gran = 1; 1469 set_posix_acl_flag(sb); 1470 1471 /* version 5 superblocks support inode version counters. */ 1472 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1473 sb->s_flags |= MS_I_VERSION; 1474 1475 error = xfs_mountfs(mp); 1476 if (error) 1477 goto out_filestream_unmount; 1478 1479 root = igrab(VFS_I(mp->m_rootip)); 1480 if (!root) { 1481 error = ENOENT; 1482 goto out_unmount; 1483 } 1484 sb->s_root = d_make_root(root); 1485 if (!sb->s_root) { 1486 error = ENOMEM; 1487 goto out_unmount; 1488 } 1489 1490 return 0; 1491 1492 out_filestream_unmount: 1493 xfs_filestream_unmount(mp); 1494 out_free_sb: 1495 xfs_freesb(mp); 1496 out_destroy_counters: 1497 xfs_icsb_destroy_counters(mp); 1498 out_destroy_workqueues: 1499 xfs_destroy_mount_workqueues(mp); 1500 out_close_devices: 1501 xfs_close_devices(mp); 1502 out_free_fsname: 1503 xfs_free_fsname(mp); 1504 kfree(mp); 1505 out: 1506 return -error; 1507 1508 out_unmount: 1509 xfs_filestream_unmount(mp); 1510 xfs_unmountfs(mp); 1511 goto out_free_sb; 1512 } 1513 1514 STATIC struct dentry * 1515 xfs_fs_mount( 1516 struct file_system_type *fs_type, 1517 int flags, 1518 const char *dev_name, 1519 void *data) 1520 { 1521 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); 1522 } 1523 1524 static long 1525 xfs_fs_nr_cached_objects( 1526 struct super_block *sb, 1527 int nid) 1528 { 1529 return xfs_reclaim_inodes_count(XFS_M(sb)); 1530 } 1531 1532 static long 1533 xfs_fs_free_cached_objects( 1534 struct super_block *sb, 1535 long nr_to_scan, 1536 int nid) 1537 { 1538 return xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan); 1539 } 1540 1541 static const struct super_operations xfs_super_operations = { 1542 .alloc_inode = xfs_fs_alloc_inode, 1543 .destroy_inode = xfs_fs_destroy_inode, 1544 .evict_inode = xfs_fs_evict_inode, 1545 .drop_inode = xfs_fs_drop_inode, 1546 .put_super = xfs_fs_put_super, 1547 .sync_fs = xfs_fs_sync_fs, 1548 .freeze_fs = xfs_fs_freeze, 1549 .unfreeze_fs = xfs_fs_unfreeze, 1550 .statfs = xfs_fs_statfs, 1551 .remount_fs = xfs_fs_remount, 1552 .show_options = xfs_fs_show_options, 1553 .nr_cached_objects = xfs_fs_nr_cached_objects, 1554 .free_cached_objects = xfs_fs_free_cached_objects, 1555 }; 1556 1557 static struct file_system_type xfs_fs_type = { 1558 .owner = THIS_MODULE, 1559 .name = "xfs", 1560 .mount = xfs_fs_mount, 1561 .kill_sb = kill_block_super, 1562 .fs_flags = FS_REQUIRES_DEV, 1563 }; 1564 MODULE_ALIAS_FS("xfs"); 1565 1566 STATIC int __init 1567 xfs_init_zones(void) 1568 { 1569 1570 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); 1571 if (!xfs_ioend_zone) 1572 goto out; 1573 1574 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, 1575 xfs_ioend_zone); 1576 if (!xfs_ioend_pool) 1577 goto out_destroy_ioend_zone; 1578 1579 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1580 "xfs_log_ticket"); 1581 if (!xfs_log_ticket_zone) 1582 goto out_destroy_ioend_pool; 1583 1584 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1585 "xfs_bmap_free_item"); 1586 if (!xfs_bmap_free_item_zone) 1587 goto out_destroy_log_ticket_zone; 1588 1589 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1590 "xfs_btree_cur"); 1591 if (!xfs_btree_cur_zone) 1592 goto out_destroy_bmap_free_item_zone; 1593 1594 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1595 "xfs_da_state"); 1596 if (!xfs_da_state_zone) 1597 goto out_destroy_btree_cur_zone; 1598 1599 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1600 if (!xfs_ifork_zone) 1601 goto out_destroy_da_state_zone; 1602 1603 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1604 if (!xfs_trans_zone) 1605 goto out_destroy_ifork_zone; 1606 1607 xfs_log_item_desc_zone = 1608 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1609 "xfs_log_item_desc"); 1610 if (!xfs_log_item_desc_zone) 1611 goto out_destroy_trans_zone; 1612 1613 /* 1614 * The size of the zone allocated buf log item is the maximum 1615 * size possible under XFS. This wastes a little bit of memory, 1616 * but it is much faster. 1617 */ 1618 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1619 "xfs_buf_item"); 1620 if (!xfs_buf_item_zone) 1621 goto out_destroy_log_item_desc_zone; 1622 1623 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1624 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1625 sizeof(xfs_extent_t))), "xfs_efd_item"); 1626 if (!xfs_efd_zone) 1627 goto out_destroy_buf_item_zone; 1628 1629 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1630 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1631 sizeof(xfs_extent_t))), "xfs_efi_item"); 1632 if (!xfs_efi_zone) 1633 goto out_destroy_efd_zone; 1634 1635 xfs_inode_zone = 1636 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1637 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD, 1638 xfs_fs_inode_init_once); 1639 if (!xfs_inode_zone) 1640 goto out_destroy_efi_zone; 1641 1642 xfs_ili_zone = 1643 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1644 KM_ZONE_SPREAD, NULL); 1645 if (!xfs_ili_zone) 1646 goto out_destroy_inode_zone; 1647 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item), 1648 "xfs_icr"); 1649 if (!xfs_icreate_zone) 1650 goto out_destroy_ili_zone; 1651 1652 return 0; 1653 1654 out_destroy_ili_zone: 1655 kmem_zone_destroy(xfs_ili_zone); 1656 out_destroy_inode_zone: 1657 kmem_zone_destroy(xfs_inode_zone); 1658 out_destroy_efi_zone: 1659 kmem_zone_destroy(xfs_efi_zone); 1660 out_destroy_efd_zone: 1661 kmem_zone_destroy(xfs_efd_zone); 1662 out_destroy_buf_item_zone: 1663 kmem_zone_destroy(xfs_buf_item_zone); 1664 out_destroy_log_item_desc_zone: 1665 kmem_zone_destroy(xfs_log_item_desc_zone); 1666 out_destroy_trans_zone: 1667 kmem_zone_destroy(xfs_trans_zone); 1668 out_destroy_ifork_zone: 1669 kmem_zone_destroy(xfs_ifork_zone); 1670 out_destroy_da_state_zone: 1671 kmem_zone_destroy(xfs_da_state_zone); 1672 out_destroy_btree_cur_zone: 1673 kmem_zone_destroy(xfs_btree_cur_zone); 1674 out_destroy_bmap_free_item_zone: 1675 kmem_zone_destroy(xfs_bmap_free_item_zone); 1676 out_destroy_log_ticket_zone: 1677 kmem_zone_destroy(xfs_log_ticket_zone); 1678 out_destroy_ioend_pool: 1679 mempool_destroy(xfs_ioend_pool); 1680 out_destroy_ioend_zone: 1681 kmem_zone_destroy(xfs_ioend_zone); 1682 out: 1683 return -ENOMEM; 1684 } 1685 1686 STATIC void 1687 xfs_destroy_zones(void) 1688 { 1689 /* 1690 * Make sure all delayed rcu free are flushed before we 1691 * destroy caches. 1692 */ 1693 rcu_barrier(); 1694 kmem_zone_destroy(xfs_icreate_zone); 1695 kmem_zone_destroy(xfs_ili_zone); 1696 kmem_zone_destroy(xfs_inode_zone); 1697 kmem_zone_destroy(xfs_efi_zone); 1698 kmem_zone_destroy(xfs_efd_zone); 1699 kmem_zone_destroy(xfs_buf_item_zone); 1700 kmem_zone_destroy(xfs_log_item_desc_zone); 1701 kmem_zone_destroy(xfs_trans_zone); 1702 kmem_zone_destroy(xfs_ifork_zone); 1703 kmem_zone_destroy(xfs_da_state_zone); 1704 kmem_zone_destroy(xfs_btree_cur_zone); 1705 kmem_zone_destroy(xfs_bmap_free_item_zone); 1706 kmem_zone_destroy(xfs_log_ticket_zone); 1707 mempool_destroy(xfs_ioend_pool); 1708 kmem_zone_destroy(xfs_ioend_zone); 1709 1710 } 1711 1712 STATIC int __init 1713 xfs_init_workqueues(void) 1714 { 1715 /* 1716 * The allocation workqueue can be used in memory reclaim situations 1717 * (writepage path), and parallelism is only limited by the number of 1718 * AGs in all the filesystems mounted. Hence use the default large 1719 * max_active value for this workqueue. 1720 */ 1721 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0); 1722 if (!xfs_alloc_wq) 1723 return -ENOMEM; 1724 1725 return 0; 1726 } 1727 1728 STATIC void 1729 xfs_destroy_workqueues(void) 1730 { 1731 destroy_workqueue(xfs_alloc_wq); 1732 } 1733 1734 STATIC int __init 1735 init_xfs_fs(void) 1736 { 1737 int error; 1738 1739 printk(KERN_INFO XFS_VERSION_STRING " with " 1740 XFS_BUILD_OPTIONS " enabled\n"); 1741 1742 xfs_dir_startup(); 1743 1744 error = xfs_init_zones(); 1745 if (error) 1746 goto out; 1747 1748 error = xfs_init_workqueues(); 1749 if (error) 1750 goto out_destroy_zones; 1751 1752 error = xfs_mru_cache_init(); 1753 if (error) 1754 goto out_destroy_wq; 1755 1756 error = xfs_filestream_init(); 1757 if (error) 1758 goto out_mru_cache_uninit; 1759 1760 error = xfs_buf_init(); 1761 if (error) 1762 goto out_filestream_uninit; 1763 1764 error = xfs_init_procfs(); 1765 if (error) 1766 goto out_buf_terminate; 1767 1768 error = xfs_sysctl_register(); 1769 if (error) 1770 goto out_cleanup_procfs; 1771 1772 error = xfs_qm_init(); 1773 if (error) 1774 goto out_sysctl_unregister; 1775 1776 error = register_filesystem(&xfs_fs_type); 1777 if (error) 1778 goto out_qm_exit; 1779 return 0; 1780 1781 out_qm_exit: 1782 xfs_qm_exit(); 1783 out_sysctl_unregister: 1784 xfs_sysctl_unregister(); 1785 out_cleanup_procfs: 1786 xfs_cleanup_procfs(); 1787 out_buf_terminate: 1788 xfs_buf_terminate(); 1789 out_filestream_uninit: 1790 xfs_filestream_uninit(); 1791 out_mru_cache_uninit: 1792 xfs_mru_cache_uninit(); 1793 out_destroy_wq: 1794 xfs_destroy_workqueues(); 1795 out_destroy_zones: 1796 xfs_destroy_zones(); 1797 out: 1798 return error; 1799 } 1800 1801 STATIC void __exit 1802 exit_xfs_fs(void) 1803 { 1804 xfs_qm_exit(); 1805 unregister_filesystem(&xfs_fs_type); 1806 xfs_sysctl_unregister(); 1807 xfs_cleanup_procfs(); 1808 xfs_buf_terminate(); 1809 xfs_filestream_uninit(); 1810 xfs_mru_cache_uninit(); 1811 xfs_destroy_workqueues(); 1812 xfs_destroy_zones(); 1813 } 1814 1815 module_init(init_xfs_fs); 1816 module_exit(exit_xfs_fs); 1817 1818 MODULE_AUTHOR("Silicon Graphics, Inc."); 1819 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1820 MODULE_LICENSE("GPL"); 1821