1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2006 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 7 #include "xfs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_sb.h" 13 #include "xfs_mount.h" 14 #include "xfs_inode.h" 15 #include "xfs_btree.h" 16 #include "xfs_bmap.h" 17 #include "xfs_alloc.h" 18 #include "xfs_fsops.h" 19 #include "xfs_trans.h" 20 #include "xfs_buf_item.h" 21 #include "xfs_log.h" 22 #include "xfs_log_priv.h" 23 #include "xfs_dir2.h" 24 #include "xfs_extfree_item.h" 25 #include "xfs_mru_cache.h" 26 #include "xfs_inode_item.h" 27 #include "xfs_icache.h" 28 #include "xfs_trace.h" 29 #include "xfs_icreate_item.h" 30 #include "xfs_filestream.h" 31 #include "xfs_quota.h" 32 #include "xfs_sysfs.h" 33 #include "xfs_ondisk.h" 34 #include "xfs_rmap_item.h" 35 #include "xfs_refcount_item.h" 36 #include "xfs_bmap_item.h" 37 #include "xfs_reflink.h" 38 #include "xfs_pwork.h" 39 40 #include <linux/magic.h> 41 #include <linux/fs_context.h> 42 #include <linux/fs_parser.h> 43 44 static const struct super_operations xfs_super_operations; 45 46 static struct kset *xfs_kset; /* top-level xfs sysfs dir */ 47 #ifdef DEBUG 48 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ 49 #endif 50 51 enum xfs_dax_mode { 52 XFS_DAX_INODE = 0, 53 XFS_DAX_ALWAYS = 1, 54 XFS_DAX_NEVER = 2, 55 }; 56 57 static void 58 xfs_mount_set_dax_mode( 59 struct xfs_mount *mp, 60 enum xfs_dax_mode mode) 61 { 62 switch (mode) { 63 case XFS_DAX_INODE: 64 mp->m_flags &= ~(XFS_MOUNT_DAX_ALWAYS | XFS_MOUNT_DAX_NEVER); 65 break; 66 case XFS_DAX_ALWAYS: 67 mp->m_flags |= XFS_MOUNT_DAX_ALWAYS; 68 mp->m_flags &= ~XFS_MOUNT_DAX_NEVER; 69 break; 70 case XFS_DAX_NEVER: 71 mp->m_flags |= XFS_MOUNT_DAX_NEVER; 72 mp->m_flags &= ~XFS_MOUNT_DAX_ALWAYS; 73 break; 74 } 75 } 76 77 static const struct constant_table dax_param_enums[] = { 78 {"inode", XFS_DAX_INODE }, 79 {"always", XFS_DAX_ALWAYS }, 80 {"never", XFS_DAX_NEVER }, 81 {} 82 }; 83 84 /* 85 * Table driven mount option parser. 86 */ 87 enum { 88 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, 89 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid, 90 Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups, 91 Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep, 92 Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2, 93 Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, 94 Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota, 95 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce, 96 Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, 97 }; 98 99 static const struct fs_parameter_spec xfs_fs_parameters[] = { 100 fsparam_u32("logbufs", Opt_logbufs), 101 fsparam_string("logbsize", Opt_logbsize), 102 fsparam_string("logdev", Opt_logdev), 103 fsparam_string("rtdev", Opt_rtdev), 104 fsparam_flag("wsync", Opt_wsync), 105 fsparam_flag("noalign", Opt_noalign), 106 fsparam_flag("swalloc", Opt_swalloc), 107 fsparam_u32("sunit", Opt_sunit), 108 fsparam_u32("swidth", Opt_swidth), 109 fsparam_flag("nouuid", Opt_nouuid), 110 fsparam_flag("grpid", Opt_grpid), 111 fsparam_flag("nogrpid", Opt_nogrpid), 112 fsparam_flag("bsdgroups", Opt_bsdgroups), 113 fsparam_flag("sysvgroups", Opt_sysvgroups), 114 fsparam_string("allocsize", Opt_allocsize), 115 fsparam_flag("norecovery", Opt_norecovery), 116 fsparam_flag("inode64", Opt_inode64), 117 fsparam_flag("inode32", Opt_inode32), 118 fsparam_flag("ikeep", Opt_ikeep), 119 fsparam_flag("noikeep", Opt_noikeep), 120 fsparam_flag("largeio", Opt_largeio), 121 fsparam_flag("nolargeio", Opt_nolargeio), 122 fsparam_flag("attr2", Opt_attr2), 123 fsparam_flag("noattr2", Opt_noattr2), 124 fsparam_flag("filestreams", Opt_filestreams), 125 fsparam_flag("quota", Opt_quota), 126 fsparam_flag("noquota", Opt_noquota), 127 fsparam_flag("usrquota", Opt_usrquota), 128 fsparam_flag("grpquota", Opt_grpquota), 129 fsparam_flag("prjquota", Opt_prjquota), 130 fsparam_flag("uquota", Opt_uquota), 131 fsparam_flag("gquota", Opt_gquota), 132 fsparam_flag("pquota", Opt_pquota), 133 fsparam_flag("uqnoenforce", Opt_uqnoenforce), 134 fsparam_flag("gqnoenforce", Opt_gqnoenforce), 135 fsparam_flag("pqnoenforce", Opt_pqnoenforce), 136 fsparam_flag("qnoenforce", Opt_qnoenforce), 137 fsparam_flag("discard", Opt_discard), 138 fsparam_flag("nodiscard", Opt_nodiscard), 139 fsparam_flag("dax", Opt_dax), 140 fsparam_enum("dax", Opt_dax_enum, dax_param_enums), 141 {} 142 }; 143 144 struct proc_xfs_info { 145 uint64_t flag; 146 char *str; 147 }; 148 149 static int 150 xfs_fs_show_options( 151 struct seq_file *m, 152 struct dentry *root) 153 { 154 static struct proc_xfs_info xfs_info_set[] = { 155 /* the few simple ones we can get from the mount struct */ 156 { XFS_MOUNT_IKEEP, ",ikeep" }, 157 { XFS_MOUNT_WSYNC, ",wsync" }, 158 { XFS_MOUNT_NOALIGN, ",noalign" }, 159 { XFS_MOUNT_SWALLOC, ",swalloc" }, 160 { XFS_MOUNT_NOUUID, ",nouuid" }, 161 { XFS_MOUNT_NORECOVERY, ",norecovery" }, 162 { XFS_MOUNT_ATTR2, ",attr2" }, 163 { XFS_MOUNT_FILESTREAMS, ",filestreams" }, 164 { XFS_MOUNT_GRPID, ",grpid" }, 165 { XFS_MOUNT_DISCARD, ",discard" }, 166 { XFS_MOUNT_LARGEIO, ",largeio" }, 167 { XFS_MOUNT_DAX_ALWAYS, ",dax=always" }, 168 { XFS_MOUNT_DAX_NEVER, ",dax=never" }, 169 { 0, NULL } 170 }; 171 struct xfs_mount *mp = XFS_M(root->d_sb); 172 struct proc_xfs_info *xfs_infop; 173 174 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 175 if (mp->m_flags & xfs_infop->flag) 176 seq_puts(m, xfs_infop->str); 177 } 178 179 seq_printf(m, ",inode%d", 180 (mp->m_flags & XFS_MOUNT_SMALL_INUMS) ? 32 : 64); 181 182 if (mp->m_flags & XFS_MOUNT_ALLOCSIZE) 183 seq_printf(m, ",allocsize=%dk", 184 (1 << mp->m_allocsize_log) >> 10); 185 186 if (mp->m_logbufs > 0) 187 seq_printf(m, ",logbufs=%d", mp->m_logbufs); 188 if (mp->m_logbsize > 0) 189 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10); 190 191 if (mp->m_logname) 192 seq_show_option(m, "logdev", mp->m_logname); 193 if (mp->m_rtname) 194 seq_show_option(m, "rtdev", mp->m_rtname); 195 196 if (mp->m_dalign > 0) 197 seq_printf(m, ",sunit=%d", 198 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 199 if (mp->m_swidth > 0) 200 seq_printf(m, ",swidth=%d", 201 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 202 203 if (mp->m_qflags & XFS_UQUOTA_ACCT) { 204 if (mp->m_qflags & XFS_UQUOTA_ENFD) 205 seq_puts(m, ",usrquota"); 206 else 207 seq_puts(m, ",uqnoenforce"); 208 } 209 210 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 211 if (mp->m_qflags & XFS_PQUOTA_ENFD) 212 seq_puts(m, ",prjquota"); 213 else 214 seq_puts(m, ",pqnoenforce"); 215 } 216 if (mp->m_qflags & XFS_GQUOTA_ACCT) { 217 if (mp->m_qflags & XFS_GQUOTA_ENFD) 218 seq_puts(m, ",grpquota"); 219 else 220 seq_puts(m, ",gqnoenforce"); 221 } 222 223 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 224 seq_puts(m, ",noquota"); 225 226 return 0; 227 } 228 229 /* 230 * Set parameters for inode allocation heuristics, taking into account 231 * filesystem size and inode32/inode64 mount options; i.e. specifically 232 * whether or not XFS_MOUNT_SMALL_INUMS is set. 233 * 234 * Inode allocation patterns are altered only if inode32 is requested 235 * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large. 236 * If altered, XFS_MOUNT_32BITINODES is set as well. 237 * 238 * An agcount independent of that in the mount structure is provided 239 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated 240 * to the potentially higher ag count. 241 * 242 * Returns the maximum AG index which may contain inodes. 243 */ 244 xfs_agnumber_t 245 xfs_set_inode_alloc( 246 struct xfs_mount *mp, 247 xfs_agnumber_t agcount) 248 { 249 xfs_agnumber_t index; 250 xfs_agnumber_t maxagi = 0; 251 xfs_sb_t *sbp = &mp->m_sb; 252 xfs_agnumber_t max_metadata; 253 xfs_agino_t agino; 254 xfs_ino_t ino; 255 256 /* 257 * Calculate how much should be reserved for inodes to meet 258 * the max inode percentage. Used only for inode32. 259 */ 260 if (M_IGEO(mp)->maxicount) { 261 uint64_t icount; 262 263 icount = sbp->sb_dblocks * sbp->sb_imax_pct; 264 do_div(icount, 100); 265 icount += sbp->sb_agblocks - 1; 266 do_div(icount, sbp->sb_agblocks); 267 max_metadata = icount; 268 } else { 269 max_metadata = agcount; 270 } 271 272 /* Get the last possible inode in the filesystem */ 273 agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1); 274 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); 275 276 /* 277 * If user asked for no more than 32-bit inodes, and the fs is 278 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter 279 * the allocator to accommodate the request. 280 */ 281 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32) 282 mp->m_flags |= XFS_MOUNT_32BITINODES; 283 else 284 mp->m_flags &= ~XFS_MOUNT_32BITINODES; 285 286 for (index = 0; index < agcount; index++) { 287 struct xfs_perag *pag; 288 289 ino = XFS_AGINO_TO_INO(mp, index, agino); 290 291 pag = xfs_perag_get(mp, index); 292 293 if (mp->m_flags & XFS_MOUNT_32BITINODES) { 294 if (ino > XFS_MAXINUMBER_32) { 295 pag->pagi_inodeok = 0; 296 pag->pagf_metadata = 0; 297 } else { 298 pag->pagi_inodeok = 1; 299 maxagi++; 300 if (index < max_metadata) 301 pag->pagf_metadata = 1; 302 else 303 pag->pagf_metadata = 0; 304 } 305 } else { 306 pag->pagi_inodeok = 1; 307 pag->pagf_metadata = 0; 308 } 309 310 xfs_perag_put(pag); 311 } 312 313 return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount; 314 } 315 316 STATIC int 317 xfs_blkdev_get( 318 xfs_mount_t *mp, 319 const char *name, 320 struct block_device **bdevp) 321 { 322 int error = 0; 323 324 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 325 mp); 326 if (IS_ERR(*bdevp)) { 327 error = PTR_ERR(*bdevp); 328 xfs_warn(mp, "Invalid device [%s], error=%d", name, error); 329 } 330 331 return error; 332 } 333 334 STATIC void 335 xfs_blkdev_put( 336 struct block_device *bdev) 337 { 338 if (bdev) 339 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 340 } 341 342 void 343 xfs_blkdev_issue_flush( 344 xfs_buftarg_t *buftarg) 345 { 346 blkdev_issue_flush(buftarg->bt_bdev); 347 } 348 349 STATIC void 350 xfs_close_devices( 351 struct xfs_mount *mp) 352 { 353 struct dax_device *dax_ddev = mp->m_ddev_targp->bt_daxdev; 354 355 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 356 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 357 struct dax_device *dax_logdev = mp->m_logdev_targp->bt_daxdev; 358 359 xfs_free_buftarg(mp->m_logdev_targp); 360 xfs_blkdev_put(logdev); 361 fs_put_dax(dax_logdev); 362 } 363 if (mp->m_rtdev_targp) { 364 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 365 struct dax_device *dax_rtdev = mp->m_rtdev_targp->bt_daxdev; 366 367 xfs_free_buftarg(mp->m_rtdev_targp); 368 xfs_blkdev_put(rtdev); 369 fs_put_dax(dax_rtdev); 370 } 371 xfs_free_buftarg(mp->m_ddev_targp); 372 fs_put_dax(dax_ddev); 373 } 374 375 /* 376 * The file system configurations are: 377 * (1) device (partition) with data and internal log 378 * (2) logical volume with data and log subvolumes. 379 * (3) logical volume with data, log, and realtime subvolumes. 380 * 381 * We only have to handle opening the log and realtime volumes here if 382 * they are present. The data subvolume has already been opened by 383 * get_sb_bdev() and is stored in sb->s_bdev. 384 */ 385 STATIC int 386 xfs_open_devices( 387 struct xfs_mount *mp) 388 { 389 struct block_device *ddev = mp->m_super->s_bdev; 390 struct dax_device *dax_ddev = fs_dax_get_by_bdev(ddev); 391 struct dax_device *dax_logdev = NULL, *dax_rtdev = NULL; 392 struct block_device *logdev = NULL, *rtdev = NULL; 393 int error; 394 395 /* 396 * Open real time and log devices - order is important. 397 */ 398 if (mp->m_logname) { 399 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 400 if (error) 401 goto out; 402 dax_logdev = fs_dax_get_by_bdev(logdev); 403 } 404 405 if (mp->m_rtname) { 406 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 407 if (error) 408 goto out_close_logdev; 409 410 if (rtdev == ddev || rtdev == logdev) { 411 xfs_warn(mp, 412 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 413 error = -EINVAL; 414 goto out_close_rtdev; 415 } 416 dax_rtdev = fs_dax_get_by_bdev(rtdev); 417 } 418 419 /* 420 * Setup xfs_mount buffer target pointers 421 */ 422 error = -ENOMEM; 423 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, dax_ddev); 424 if (!mp->m_ddev_targp) 425 goto out_close_rtdev; 426 427 if (rtdev) { 428 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, dax_rtdev); 429 if (!mp->m_rtdev_targp) 430 goto out_free_ddev_targ; 431 } 432 433 if (logdev && logdev != ddev) { 434 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, dax_logdev); 435 if (!mp->m_logdev_targp) 436 goto out_free_rtdev_targ; 437 } else { 438 mp->m_logdev_targp = mp->m_ddev_targp; 439 } 440 441 return 0; 442 443 out_free_rtdev_targ: 444 if (mp->m_rtdev_targp) 445 xfs_free_buftarg(mp->m_rtdev_targp); 446 out_free_ddev_targ: 447 xfs_free_buftarg(mp->m_ddev_targp); 448 out_close_rtdev: 449 xfs_blkdev_put(rtdev); 450 fs_put_dax(dax_rtdev); 451 out_close_logdev: 452 if (logdev && logdev != ddev) { 453 xfs_blkdev_put(logdev); 454 fs_put_dax(dax_logdev); 455 } 456 out: 457 fs_put_dax(dax_ddev); 458 return error; 459 } 460 461 /* 462 * Setup xfs_mount buffer target pointers based on superblock 463 */ 464 STATIC int 465 xfs_setup_devices( 466 struct xfs_mount *mp) 467 { 468 int error; 469 470 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize); 471 if (error) 472 return error; 473 474 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 475 unsigned int log_sector_size = BBSIZE; 476 477 if (xfs_sb_version_hassector(&mp->m_sb)) 478 log_sector_size = mp->m_sb.sb_logsectsize; 479 error = xfs_setsize_buftarg(mp->m_logdev_targp, 480 log_sector_size); 481 if (error) 482 return error; 483 } 484 if (mp->m_rtdev_targp) { 485 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 486 mp->m_sb.sb_sectsize); 487 if (error) 488 return error; 489 } 490 491 return 0; 492 } 493 494 STATIC int 495 xfs_init_mount_workqueues( 496 struct xfs_mount *mp) 497 { 498 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s", 499 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 500 1, mp->m_super->s_id); 501 if (!mp->m_buf_workqueue) 502 goto out; 503 504 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 505 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 506 0, mp->m_super->s_id); 507 if (!mp->m_unwritten_workqueue) 508 goto out_destroy_buf; 509 510 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 511 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_UNBOUND), 512 0, mp->m_super->s_id); 513 if (!mp->m_cil_workqueue) 514 goto out_destroy_unwritten; 515 516 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 517 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 518 0, mp->m_super->s_id); 519 if (!mp->m_reclaim_workqueue) 520 goto out_destroy_cil; 521 522 mp->m_blockgc_workqueue = alloc_workqueue("xfs-blockgc/%s", 523 WQ_SYSFS | WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM, 524 0, mp->m_super->s_id); 525 if (!mp->m_blockgc_workqueue) 526 goto out_destroy_reclaim; 527 528 mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", 529 XFS_WQFLAGS(WQ_FREEZABLE), 0, mp->m_super->s_id); 530 if (!mp->m_sync_workqueue) 531 goto out_destroy_eofb; 532 533 return 0; 534 535 out_destroy_eofb: 536 destroy_workqueue(mp->m_blockgc_workqueue); 537 out_destroy_reclaim: 538 destroy_workqueue(mp->m_reclaim_workqueue); 539 out_destroy_cil: 540 destroy_workqueue(mp->m_cil_workqueue); 541 out_destroy_unwritten: 542 destroy_workqueue(mp->m_unwritten_workqueue); 543 out_destroy_buf: 544 destroy_workqueue(mp->m_buf_workqueue); 545 out: 546 return -ENOMEM; 547 } 548 549 STATIC void 550 xfs_destroy_mount_workqueues( 551 struct xfs_mount *mp) 552 { 553 destroy_workqueue(mp->m_sync_workqueue); 554 destroy_workqueue(mp->m_blockgc_workqueue); 555 destroy_workqueue(mp->m_reclaim_workqueue); 556 destroy_workqueue(mp->m_cil_workqueue); 557 destroy_workqueue(mp->m_unwritten_workqueue); 558 destroy_workqueue(mp->m_buf_workqueue); 559 } 560 561 static void 562 xfs_flush_inodes_worker( 563 struct work_struct *work) 564 { 565 struct xfs_mount *mp = container_of(work, struct xfs_mount, 566 m_flush_inodes_work); 567 struct super_block *sb = mp->m_super; 568 569 if (down_read_trylock(&sb->s_umount)) { 570 sync_inodes_sb(sb); 571 up_read(&sb->s_umount); 572 } 573 } 574 575 /* 576 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 577 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 578 * for IO to complete so that we effectively throttle multiple callers to the 579 * rate at which IO is completing. 580 */ 581 void 582 xfs_flush_inodes( 583 struct xfs_mount *mp) 584 { 585 /* 586 * If flush_work() returns true then that means we waited for a flush 587 * which was already in progress. Don't bother running another scan. 588 */ 589 if (flush_work(&mp->m_flush_inodes_work)) 590 return; 591 592 queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work); 593 flush_work(&mp->m_flush_inodes_work); 594 } 595 596 /* Catch misguided souls that try to use this interface on XFS */ 597 STATIC struct inode * 598 xfs_fs_alloc_inode( 599 struct super_block *sb) 600 { 601 BUG(); 602 return NULL; 603 } 604 605 #ifdef DEBUG 606 static void 607 xfs_check_delalloc( 608 struct xfs_inode *ip, 609 int whichfork) 610 { 611 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 612 struct xfs_bmbt_irec got; 613 struct xfs_iext_cursor icur; 614 615 if (!ifp || !xfs_iext_lookup_extent(ip, ifp, 0, &icur, &got)) 616 return; 617 do { 618 if (isnullstartblock(got.br_startblock)) { 619 xfs_warn(ip->i_mount, 620 "ino %llx %s fork has delalloc extent at [0x%llx:0x%llx]", 621 ip->i_ino, 622 whichfork == XFS_DATA_FORK ? "data" : "cow", 623 got.br_startoff, got.br_blockcount); 624 } 625 } while (xfs_iext_next_extent(ifp, &icur, &got)); 626 } 627 #else 628 #define xfs_check_delalloc(ip, whichfork) do { } while (0) 629 #endif 630 631 /* 632 * Now that the generic code is guaranteed not to be accessing 633 * the linux inode, we can inactivate and reclaim the inode. 634 */ 635 STATIC void 636 xfs_fs_destroy_inode( 637 struct inode *inode) 638 { 639 struct xfs_inode *ip = XFS_I(inode); 640 641 trace_xfs_destroy_inode(ip); 642 643 ASSERT(!rwsem_is_locked(&inode->i_rwsem)); 644 XFS_STATS_INC(ip->i_mount, vn_rele); 645 XFS_STATS_INC(ip->i_mount, vn_remove); 646 647 xfs_inactive(ip); 648 649 if (!XFS_FORCED_SHUTDOWN(ip->i_mount) && ip->i_delayed_blks) { 650 xfs_check_delalloc(ip, XFS_DATA_FORK); 651 xfs_check_delalloc(ip, XFS_COW_FORK); 652 ASSERT(0); 653 } 654 655 XFS_STATS_INC(ip->i_mount, vn_reclaim); 656 657 /* 658 * We should never get here with one of the reclaim flags already set. 659 */ 660 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); 661 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); 662 663 /* 664 * We always use background reclaim here because even if the inode is 665 * clean, it still may be under IO and hence we have wait for IO 666 * completion to occur before we can reclaim the inode. The background 667 * reclaim path handles this more efficiently than we can here, so 668 * simply let background reclaim tear down all inodes. 669 */ 670 xfs_inode_set_reclaim_tag(ip); 671 } 672 673 static void 674 xfs_fs_dirty_inode( 675 struct inode *inode, 676 int flag) 677 { 678 struct xfs_inode *ip = XFS_I(inode); 679 struct xfs_mount *mp = ip->i_mount; 680 struct xfs_trans *tp; 681 682 if (!(inode->i_sb->s_flags & SB_LAZYTIME)) 683 return; 684 if (flag != I_DIRTY_SYNC || !(inode->i_state & I_DIRTY_TIME)) 685 return; 686 687 if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp)) 688 return; 689 xfs_ilock(ip, XFS_ILOCK_EXCL); 690 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 691 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); 692 xfs_trans_commit(tp); 693 } 694 695 /* 696 * Slab object creation initialisation for the XFS inode. 697 * This covers only the idempotent fields in the XFS inode; 698 * all other fields need to be initialised on allocation 699 * from the slab. This avoids the need to repeatedly initialise 700 * fields in the xfs inode that left in the initialise state 701 * when freeing the inode. 702 */ 703 STATIC void 704 xfs_fs_inode_init_once( 705 void *inode) 706 { 707 struct xfs_inode *ip = inode; 708 709 memset(ip, 0, sizeof(struct xfs_inode)); 710 711 /* vfs inode */ 712 inode_init_once(VFS_I(ip)); 713 714 /* xfs inode */ 715 atomic_set(&ip->i_pincount, 0); 716 spin_lock_init(&ip->i_flags_lock); 717 718 mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 719 "xfsino", ip->i_ino); 720 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 721 "xfsino", ip->i_ino); 722 } 723 724 /* 725 * We do an unlocked check for XFS_IDONTCACHE here because we are already 726 * serialised against cache hits here via the inode->i_lock and igrab() in 727 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 728 * racing with us, and it avoids needing to grab a spinlock here for every inode 729 * we drop the final reference on. 730 */ 731 STATIC int 732 xfs_fs_drop_inode( 733 struct inode *inode) 734 { 735 struct xfs_inode *ip = XFS_I(inode); 736 737 /* 738 * If this unlinked inode is in the middle of recovery, don't 739 * drop the inode just yet; log recovery will take care of 740 * that. See the comment for this inode flag. 741 */ 742 if (ip->i_flags & XFS_IRECOVERY) { 743 ASSERT(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED); 744 return 0; 745 } 746 747 return generic_drop_inode(inode); 748 } 749 750 static void 751 xfs_mount_free( 752 struct xfs_mount *mp) 753 { 754 kfree(mp->m_rtname); 755 kfree(mp->m_logname); 756 kmem_free(mp); 757 } 758 759 STATIC int 760 xfs_fs_sync_fs( 761 struct super_block *sb, 762 int wait) 763 { 764 struct xfs_mount *mp = XFS_M(sb); 765 766 /* 767 * Doing anything during the async pass would be counterproductive. 768 */ 769 if (!wait) 770 return 0; 771 772 xfs_log_force(mp, XFS_LOG_SYNC); 773 if (laptop_mode) { 774 /* 775 * The disk must be active because we're syncing. 776 * We schedule log work now (now that the disk is 777 * active) instead of later (when it might not be). 778 */ 779 flush_delayed_work(&mp->m_log->l_work); 780 } 781 782 return 0; 783 } 784 785 STATIC int 786 xfs_fs_statfs( 787 struct dentry *dentry, 788 struct kstatfs *statp) 789 { 790 struct xfs_mount *mp = XFS_M(dentry->d_sb); 791 xfs_sb_t *sbp = &mp->m_sb; 792 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 793 uint64_t fakeinos, id; 794 uint64_t icount; 795 uint64_t ifree; 796 uint64_t fdblocks; 797 xfs_extlen_t lsize; 798 int64_t ffree; 799 800 statp->f_type = XFS_SUPER_MAGIC; 801 statp->f_namelen = MAXNAMELEN - 1; 802 803 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 804 statp->f_fsid = u64_to_fsid(id); 805 806 icount = percpu_counter_sum(&mp->m_icount); 807 ifree = percpu_counter_sum(&mp->m_ifree); 808 fdblocks = percpu_counter_sum(&mp->m_fdblocks); 809 810 spin_lock(&mp->m_sb_lock); 811 statp->f_bsize = sbp->sb_blocksize; 812 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 813 statp->f_blocks = sbp->sb_dblocks - lsize; 814 spin_unlock(&mp->m_sb_lock); 815 816 /* make sure statp->f_bfree does not underflow */ 817 statp->f_bfree = max_t(int64_t, fdblocks - mp->m_alloc_set_aside, 0); 818 statp->f_bavail = statp->f_bfree; 819 820 fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree); 821 statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER); 822 if (M_IGEO(mp)->maxicount) 823 statp->f_files = min_t(typeof(statp->f_files), 824 statp->f_files, 825 M_IGEO(mp)->maxicount); 826 827 /* If sb_icount overshot maxicount, report actual allocation */ 828 statp->f_files = max_t(typeof(statp->f_files), 829 statp->f_files, 830 sbp->sb_icount); 831 832 /* make sure statp->f_ffree does not underflow */ 833 ffree = statp->f_files - (icount - ifree); 834 statp->f_ffree = max_t(int64_t, ffree, 0); 835 836 837 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 838 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 839 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 840 xfs_qm_statvfs(ip, statp); 841 842 if (XFS_IS_REALTIME_MOUNT(mp) && 843 (ip->i_d.di_flags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) { 844 statp->f_blocks = sbp->sb_rblocks; 845 statp->f_bavail = statp->f_bfree = 846 sbp->sb_frextents * sbp->sb_rextsize; 847 } 848 849 return 0; 850 } 851 852 STATIC void 853 xfs_save_resvblks(struct xfs_mount *mp) 854 { 855 uint64_t resblks = 0; 856 857 mp->m_resblks_save = mp->m_resblks; 858 xfs_reserve_blocks(mp, &resblks, NULL); 859 } 860 861 STATIC void 862 xfs_restore_resvblks(struct xfs_mount *mp) 863 { 864 uint64_t resblks; 865 866 if (mp->m_resblks_save) { 867 resblks = mp->m_resblks_save; 868 mp->m_resblks_save = 0; 869 } else 870 resblks = xfs_default_resblks(mp); 871 872 xfs_reserve_blocks(mp, &resblks, NULL); 873 } 874 875 /* 876 * Second stage of a freeze. The data is already frozen so we only 877 * need to take care of the metadata. Once that's done sync the superblock 878 * to the log to dirty it in case of a crash while frozen. This ensures that we 879 * will recover the unlinked inode lists on the next mount. 880 */ 881 STATIC int 882 xfs_fs_freeze( 883 struct super_block *sb) 884 { 885 struct xfs_mount *mp = XFS_M(sb); 886 unsigned int flags; 887 int ret; 888 889 /* 890 * The filesystem is now frozen far enough that memory reclaim 891 * cannot safely operate on the filesystem. Hence we need to 892 * set a GFP_NOFS context here to avoid recursion deadlocks. 893 */ 894 flags = memalloc_nofs_save(); 895 xfs_blockgc_stop(mp); 896 xfs_save_resvblks(mp); 897 ret = xfs_log_quiesce(mp); 898 memalloc_nofs_restore(flags); 899 return ret; 900 } 901 902 STATIC int 903 xfs_fs_unfreeze( 904 struct super_block *sb) 905 { 906 struct xfs_mount *mp = XFS_M(sb); 907 908 xfs_restore_resvblks(mp); 909 xfs_log_work_queue(mp); 910 xfs_blockgc_start(mp); 911 return 0; 912 } 913 914 /* 915 * This function fills in xfs_mount_t fields based on mount args. 916 * Note: the superblock _has_ now been read in. 917 */ 918 STATIC int 919 xfs_finish_flags( 920 struct xfs_mount *mp) 921 { 922 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 923 924 /* Fail a mount where the logbuf is smaller than the log stripe */ 925 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 926 if (mp->m_logbsize <= 0 && 927 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 928 mp->m_logbsize = mp->m_sb.sb_logsunit; 929 } else if (mp->m_logbsize > 0 && 930 mp->m_logbsize < mp->m_sb.sb_logsunit) { 931 xfs_warn(mp, 932 "logbuf size must be greater than or equal to log stripe size"); 933 return -EINVAL; 934 } 935 } else { 936 /* Fail a mount if the logbuf is larger than 32K */ 937 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 938 xfs_warn(mp, 939 "logbuf size for version 1 logs must be 16K or 32K"); 940 return -EINVAL; 941 } 942 } 943 944 /* 945 * V5 filesystems always use attr2 format for attributes. 946 */ 947 if (xfs_sb_version_hascrc(&mp->m_sb) && 948 (mp->m_flags & XFS_MOUNT_NOATTR2)) { 949 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. " 950 "attr2 is always enabled for V5 filesystems."); 951 return -EINVAL; 952 } 953 954 /* 955 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 956 * told by noattr2 to turn it off 957 */ 958 if (xfs_sb_version_hasattr2(&mp->m_sb) && 959 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 960 mp->m_flags |= XFS_MOUNT_ATTR2; 961 962 /* 963 * prohibit r/w mounts of read-only filesystems 964 */ 965 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 966 xfs_warn(mp, 967 "cannot mount a read-only filesystem as read-write"); 968 return -EROFS; 969 } 970 971 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 972 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && 973 !xfs_sb_version_has_pquotino(&mp->m_sb)) { 974 xfs_warn(mp, 975 "Super block does not support project and group quota together"); 976 return -EINVAL; 977 } 978 979 return 0; 980 } 981 982 static int 983 xfs_init_percpu_counters( 984 struct xfs_mount *mp) 985 { 986 int error; 987 988 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); 989 if (error) 990 return -ENOMEM; 991 992 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL); 993 if (error) 994 goto free_icount; 995 996 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL); 997 if (error) 998 goto free_ifree; 999 1000 error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL); 1001 if (error) 1002 goto free_fdblocks; 1003 1004 return 0; 1005 1006 free_fdblocks: 1007 percpu_counter_destroy(&mp->m_fdblocks); 1008 free_ifree: 1009 percpu_counter_destroy(&mp->m_ifree); 1010 free_icount: 1011 percpu_counter_destroy(&mp->m_icount); 1012 return -ENOMEM; 1013 } 1014 1015 void 1016 xfs_reinit_percpu_counters( 1017 struct xfs_mount *mp) 1018 { 1019 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount); 1020 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree); 1021 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks); 1022 } 1023 1024 static void 1025 xfs_destroy_percpu_counters( 1026 struct xfs_mount *mp) 1027 { 1028 percpu_counter_destroy(&mp->m_icount); 1029 percpu_counter_destroy(&mp->m_ifree); 1030 percpu_counter_destroy(&mp->m_fdblocks); 1031 ASSERT(XFS_FORCED_SHUTDOWN(mp) || 1032 percpu_counter_sum(&mp->m_delalloc_blks) == 0); 1033 percpu_counter_destroy(&mp->m_delalloc_blks); 1034 } 1035 1036 static void 1037 xfs_fs_put_super( 1038 struct super_block *sb) 1039 { 1040 struct xfs_mount *mp = XFS_M(sb); 1041 1042 /* if ->fill_super failed, we have no mount to tear down */ 1043 if (!sb->s_fs_info) 1044 return; 1045 1046 xfs_notice(mp, "Unmounting Filesystem"); 1047 xfs_filestream_unmount(mp); 1048 xfs_unmountfs(mp); 1049 1050 xfs_freesb(mp); 1051 free_percpu(mp->m_stats.xs_stats); 1052 xfs_destroy_percpu_counters(mp); 1053 xfs_destroy_mount_workqueues(mp); 1054 xfs_close_devices(mp); 1055 1056 sb->s_fs_info = NULL; 1057 xfs_mount_free(mp); 1058 } 1059 1060 static long 1061 xfs_fs_nr_cached_objects( 1062 struct super_block *sb, 1063 struct shrink_control *sc) 1064 { 1065 /* Paranoia: catch incorrect calls during mount setup or teardown */ 1066 if (WARN_ON_ONCE(!sb->s_fs_info)) 1067 return 0; 1068 return xfs_reclaim_inodes_count(XFS_M(sb)); 1069 } 1070 1071 static long 1072 xfs_fs_free_cached_objects( 1073 struct super_block *sb, 1074 struct shrink_control *sc) 1075 { 1076 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); 1077 } 1078 1079 static const struct super_operations xfs_super_operations = { 1080 .alloc_inode = xfs_fs_alloc_inode, 1081 .destroy_inode = xfs_fs_destroy_inode, 1082 .dirty_inode = xfs_fs_dirty_inode, 1083 .drop_inode = xfs_fs_drop_inode, 1084 .put_super = xfs_fs_put_super, 1085 .sync_fs = xfs_fs_sync_fs, 1086 .freeze_fs = xfs_fs_freeze, 1087 .unfreeze_fs = xfs_fs_unfreeze, 1088 .statfs = xfs_fs_statfs, 1089 .show_options = xfs_fs_show_options, 1090 .nr_cached_objects = xfs_fs_nr_cached_objects, 1091 .free_cached_objects = xfs_fs_free_cached_objects, 1092 }; 1093 1094 static int 1095 suffix_kstrtoint( 1096 const char *s, 1097 unsigned int base, 1098 int *res) 1099 { 1100 int last, shift_left_factor = 0, _res; 1101 char *value; 1102 int ret = 0; 1103 1104 value = kstrdup(s, GFP_KERNEL); 1105 if (!value) 1106 return -ENOMEM; 1107 1108 last = strlen(value) - 1; 1109 if (value[last] == 'K' || value[last] == 'k') { 1110 shift_left_factor = 10; 1111 value[last] = '\0'; 1112 } 1113 if (value[last] == 'M' || value[last] == 'm') { 1114 shift_left_factor = 20; 1115 value[last] = '\0'; 1116 } 1117 if (value[last] == 'G' || value[last] == 'g') { 1118 shift_left_factor = 30; 1119 value[last] = '\0'; 1120 } 1121 1122 if (kstrtoint(value, base, &_res)) 1123 ret = -EINVAL; 1124 kfree(value); 1125 *res = _res << shift_left_factor; 1126 return ret; 1127 } 1128 1129 /* 1130 * Set mount state from a mount option. 1131 * 1132 * NOTE: mp->m_super is NULL here! 1133 */ 1134 static int 1135 xfs_fs_parse_param( 1136 struct fs_context *fc, 1137 struct fs_parameter *param) 1138 { 1139 struct xfs_mount *mp = fc->s_fs_info; 1140 struct fs_parse_result result; 1141 int size = 0; 1142 int opt; 1143 1144 opt = fs_parse(fc, xfs_fs_parameters, param, &result); 1145 if (opt < 0) 1146 return opt; 1147 1148 switch (opt) { 1149 case Opt_logbufs: 1150 mp->m_logbufs = result.uint_32; 1151 return 0; 1152 case Opt_logbsize: 1153 if (suffix_kstrtoint(param->string, 10, &mp->m_logbsize)) 1154 return -EINVAL; 1155 return 0; 1156 case Opt_logdev: 1157 kfree(mp->m_logname); 1158 mp->m_logname = kstrdup(param->string, GFP_KERNEL); 1159 if (!mp->m_logname) 1160 return -ENOMEM; 1161 return 0; 1162 case Opt_rtdev: 1163 kfree(mp->m_rtname); 1164 mp->m_rtname = kstrdup(param->string, GFP_KERNEL); 1165 if (!mp->m_rtname) 1166 return -ENOMEM; 1167 return 0; 1168 case Opt_allocsize: 1169 if (suffix_kstrtoint(param->string, 10, &size)) 1170 return -EINVAL; 1171 mp->m_allocsize_log = ffs(size) - 1; 1172 mp->m_flags |= XFS_MOUNT_ALLOCSIZE; 1173 return 0; 1174 case Opt_grpid: 1175 case Opt_bsdgroups: 1176 mp->m_flags |= XFS_MOUNT_GRPID; 1177 return 0; 1178 case Opt_nogrpid: 1179 case Opt_sysvgroups: 1180 mp->m_flags &= ~XFS_MOUNT_GRPID; 1181 return 0; 1182 case Opt_wsync: 1183 mp->m_flags |= XFS_MOUNT_WSYNC; 1184 return 0; 1185 case Opt_norecovery: 1186 mp->m_flags |= XFS_MOUNT_NORECOVERY; 1187 return 0; 1188 case Opt_noalign: 1189 mp->m_flags |= XFS_MOUNT_NOALIGN; 1190 return 0; 1191 case Opt_swalloc: 1192 mp->m_flags |= XFS_MOUNT_SWALLOC; 1193 return 0; 1194 case Opt_sunit: 1195 mp->m_dalign = result.uint_32; 1196 return 0; 1197 case Opt_swidth: 1198 mp->m_swidth = result.uint_32; 1199 return 0; 1200 case Opt_inode32: 1201 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 1202 return 0; 1203 case Opt_inode64: 1204 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 1205 return 0; 1206 case Opt_nouuid: 1207 mp->m_flags |= XFS_MOUNT_NOUUID; 1208 return 0; 1209 case Opt_largeio: 1210 mp->m_flags |= XFS_MOUNT_LARGEIO; 1211 return 0; 1212 case Opt_nolargeio: 1213 mp->m_flags &= ~XFS_MOUNT_LARGEIO; 1214 return 0; 1215 case Opt_filestreams: 1216 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 1217 return 0; 1218 case Opt_noquota: 1219 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 1220 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 1221 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 1222 return 0; 1223 case Opt_quota: 1224 case Opt_uquota: 1225 case Opt_usrquota: 1226 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 1227 XFS_UQUOTA_ENFD); 1228 return 0; 1229 case Opt_qnoenforce: 1230 case Opt_uqnoenforce: 1231 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 1232 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 1233 return 0; 1234 case Opt_pquota: 1235 case Opt_prjquota: 1236 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 1237 XFS_PQUOTA_ENFD); 1238 return 0; 1239 case Opt_pqnoenforce: 1240 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 1241 mp->m_qflags &= ~XFS_PQUOTA_ENFD; 1242 return 0; 1243 case Opt_gquota: 1244 case Opt_grpquota: 1245 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 1246 XFS_GQUOTA_ENFD); 1247 return 0; 1248 case Opt_gqnoenforce: 1249 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 1250 mp->m_qflags &= ~XFS_GQUOTA_ENFD; 1251 return 0; 1252 case Opt_discard: 1253 mp->m_flags |= XFS_MOUNT_DISCARD; 1254 return 0; 1255 case Opt_nodiscard: 1256 mp->m_flags &= ~XFS_MOUNT_DISCARD; 1257 return 0; 1258 #ifdef CONFIG_FS_DAX 1259 case Opt_dax: 1260 xfs_mount_set_dax_mode(mp, XFS_DAX_ALWAYS); 1261 return 0; 1262 case Opt_dax_enum: 1263 xfs_mount_set_dax_mode(mp, result.uint_32); 1264 return 0; 1265 #endif 1266 /* Following mount options will be removed in September 2025 */ 1267 case Opt_ikeep: 1268 xfs_warn(mp, "%s mount option is deprecated.", param->key); 1269 mp->m_flags |= XFS_MOUNT_IKEEP; 1270 return 0; 1271 case Opt_noikeep: 1272 xfs_warn(mp, "%s mount option is deprecated.", param->key); 1273 mp->m_flags &= ~XFS_MOUNT_IKEEP; 1274 return 0; 1275 case Opt_attr2: 1276 xfs_warn(mp, "%s mount option is deprecated.", param->key); 1277 mp->m_flags |= XFS_MOUNT_ATTR2; 1278 return 0; 1279 case Opt_noattr2: 1280 xfs_warn(mp, "%s mount option is deprecated.", param->key); 1281 mp->m_flags &= ~XFS_MOUNT_ATTR2; 1282 mp->m_flags |= XFS_MOUNT_NOATTR2; 1283 return 0; 1284 default: 1285 xfs_warn(mp, "unknown mount option [%s].", param->key); 1286 return -EINVAL; 1287 } 1288 1289 return 0; 1290 } 1291 1292 static int 1293 xfs_fs_validate_params( 1294 struct xfs_mount *mp) 1295 { 1296 /* 1297 * no recovery flag requires a read-only mount 1298 */ 1299 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 1300 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 1301 xfs_warn(mp, "no-recovery mounts must be read-only."); 1302 return -EINVAL; 1303 } 1304 1305 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && 1306 (mp->m_dalign || mp->m_swidth)) { 1307 xfs_warn(mp, 1308 "sunit and swidth options incompatible with the noalign option"); 1309 return -EINVAL; 1310 } 1311 1312 if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) { 1313 xfs_warn(mp, "quota support not available in this kernel."); 1314 return -EINVAL; 1315 } 1316 1317 if ((mp->m_dalign && !mp->m_swidth) || 1318 (!mp->m_dalign && mp->m_swidth)) { 1319 xfs_warn(mp, "sunit and swidth must be specified together"); 1320 return -EINVAL; 1321 } 1322 1323 if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) { 1324 xfs_warn(mp, 1325 "stripe width (%d) must be a multiple of the stripe unit (%d)", 1326 mp->m_swidth, mp->m_dalign); 1327 return -EINVAL; 1328 } 1329 1330 if (mp->m_logbufs != -1 && 1331 mp->m_logbufs != 0 && 1332 (mp->m_logbufs < XLOG_MIN_ICLOGS || 1333 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 1334 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 1335 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 1336 return -EINVAL; 1337 } 1338 1339 if (mp->m_logbsize != -1 && 1340 mp->m_logbsize != 0 && 1341 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 1342 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 1343 !is_power_of_2(mp->m_logbsize))) { 1344 xfs_warn(mp, 1345 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 1346 mp->m_logbsize); 1347 return -EINVAL; 1348 } 1349 1350 if ((mp->m_flags & XFS_MOUNT_ALLOCSIZE) && 1351 (mp->m_allocsize_log > XFS_MAX_IO_LOG || 1352 mp->m_allocsize_log < XFS_MIN_IO_LOG)) { 1353 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 1354 mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG); 1355 return -EINVAL; 1356 } 1357 1358 return 0; 1359 } 1360 1361 static int 1362 xfs_fs_fill_super( 1363 struct super_block *sb, 1364 struct fs_context *fc) 1365 { 1366 struct xfs_mount *mp = sb->s_fs_info; 1367 struct inode *root; 1368 int flags = 0, error; 1369 1370 mp->m_super = sb; 1371 1372 error = xfs_fs_validate_params(mp); 1373 if (error) 1374 goto out_free_names; 1375 1376 sb_min_blocksize(sb, BBSIZE); 1377 sb->s_xattr = xfs_xattr_handlers; 1378 sb->s_export_op = &xfs_export_operations; 1379 #ifdef CONFIG_XFS_QUOTA 1380 sb->s_qcop = &xfs_quotactl_operations; 1381 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 1382 #endif 1383 sb->s_op = &xfs_super_operations; 1384 1385 /* 1386 * Delay mount work if the debug hook is set. This is debug 1387 * instrumention to coordinate simulation of xfs mount failures with 1388 * VFS superblock operations 1389 */ 1390 if (xfs_globals.mount_delay) { 1391 xfs_notice(mp, "Delaying mount for %d seconds.", 1392 xfs_globals.mount_delay); 1393 msleep(xfs_globals.mount_delay * 1000); 1394 } 1395 1396 if (fc->sb_flags & SB_SILENT) 1397 flags |= XFS_MFSI_QUIET; 1398 1399 error = xfs_open_devices(mp); 1400 if (error) 1401 goto out_free_names; 1402 1403 error = xfs_init_mount_workqueues(mp); 1404 if (error) 1405 goto out_close_devices; 1406 1407 error = xfs_init_percpu_counters(mp); 1408 if (error) 1409 goto out_destroy_workqueues; 1410 1411 /* Allocate stats memory before we do operations that might use it */ 1412 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats); 1413 if (!mp->m_stats.xs_stats) { 1414 error = -ENOMEM; 1415 goto out_destroy_counters; 1416 } 1417 1418 error = xfs_readsb(mp, flags); 1419 if (error) 1420 goto out_free_stats; 1421 1422 error = xfs_finish_flags(mp); 1423 if (error) 1424 goto out_free_sb; 1425 1426 error = xfs_setup_devices(mp); 1427 if (error) 1428 goto out_free_sb; 1429 1430 /* V4 support is undergoing deprecation. */ 1431 if (!xfs_sb_version_hascrc(&mp->m_sb)) { 1432 #ifdef CONFIG_XFS_SUPPORT_V4 1433 xfs_warn_once(mp, 1434 "Deprecated V4 format (crc=0) will not be supported after September 2030."); 1435 #else 1436 xfs_warn(mp, 1437 "Deprecated V4 format (crc=0) not supported by kernel."); 1438 error = -EINVAL; 1439 goto out_free_sb; 1440 #endif 1441 } 1442 1443 /* Filesystem claims it needs repair, so refuse the mount. */ 1444 if (xfs_sb_version_needsrepair(&mp->m_sb)) { 1445 xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair."); 1446 error = -EFSCORRUPTED; 1447 goto out_free_sb; 1448 } 1449 1450 /* 1451 * Don't touch the filesystem if a user tool thinks it owns the primary 1452 * superblock. mkfs doesn't clear the flag from secondary supers, so 1453 * we don't check them at all. 1454 */ 1455 if (mp->m_sb.sb_inprogress) { 1456 xfs_warn(mp, "Offline file system operation in progress!"); 1457 error = -EFSCORRUPTED; 1458 goto out_free_sb; 1459 } 1460 1461 /* 1462 * Until this is fixed only page-sized or smaller data blocks work. 1463 */ 1464 if (mp->m_sb.sb_blocksize > PAGE_SIZE) { 1465 xfs_warn(mp, 1466 "File system with blocksize %d bytes. " 1467 "Only pagesize (%ld) or less will currently work.", 1468 mp->m_sb.sb_blocksize, PAGE_SIZE); 1469 error = -ENOSYS; 1470 goto out_free_sb; 1471 } 1472 1473 /* Ensure this filesystem fits in the page cache limits */ 1474 if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) || 1475 xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) { 1476 xfs_warn(mp, 1477 "file system too large to be mounted on this system."); 1478 error = -EFBIG; 1479 goto out_free_sb; 1480 } 1481 1482 /* 1483 * XFS block mappings use 54 bits to store the logical block offset. 1484 * This should suffice to handle the maximum file size that the VFS 1485 * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT 1486 * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes 1487 * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON 1488 * to check this assertion. 1489 * 1490 * Avoid integer overflow by comparing the maximum bmbt offset to the 1491 * maximum pagecache offset in units of fs blocks. 1492 */ 1493 if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) { 1494 xfs_warn(mp, 1495 "MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!", 1496 XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE), 1497 XFS_MAX_FILEOFF); 1498 error = -EINVAL; 1499 goto out_free_sb; 1500 } 1501 1502 error = xfs_filestream_mount(mp); 1503 if (error) 1504 goto out_free_sb; 1505 1506 /* 1507 * we must configure the block size in the superblock before we run the 1508 * full mount process as the mount process can lookup and cache inodes. 1509 */ 1510 sb->s_magic = XFS_SUPER_MAGIC; 1511 sb->s_blocksize = mp->m_sb.sb_blocksize; 1512 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1513 sb->s_maxbytes = MAX_LFS_FILESIZE; 1514 sb->s_max_links = XFS_MAXLINK; 1515 sb->s_time_gran = 1; 1516 if (xfs_sb_version_hasbigtime(&mp->m_sb)) { 1517 sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN); 1518 sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX); 1519 } else { 1520 sb->s_time_min = XFS_LEGACY_TIME_MIN; 1521 sb->s_time_max = XFS_LEGACY_TIME_MAX; 1522 } 1523 trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max); 1524 sb->s_iflags |= SB_I_CGROUPWB; 1525 1526 set_posix_acl_flag(sb); 1527 1528 /* version 5 superblocks support inode version counters. */ 1529 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1530 sb->s_flags |= SB_I_VERSION; 1531 1532 if (xfs_sb_version_hasbigtime(&mp->m_sb)) 1533 xfs_warn(mp, 1534 "EXPERIMENTAL big timestamp feature in use. Use at your own risk!"); 1535 1536 if (mp->m_flags & XFS_MOUNT_DAX_ALWAYS) { 1537 bool rtdev_is_dax = false, datadev_is_dax; 1538 1539 xfs_warn(mp, 1540 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1541 1542 datadev_is_dax = bdev_dax_supported(mp->m_ddev_targp->bt_bdev, 1543 sb->s_blocksize); 1544 if (mp->m_rtdev_targp) 1545 rtdev_is_dax = bdev_dax_supported( 1546 mp->m_rtdev_targp->bt_bdev, sb->s_blocksize); 1547 if (!rtdev_is_dax && !datadev_is_dax) { 1548 xfs_alert(mp, 1549 "DAX unsupported by block device. Turning off DAX."); 1550 xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER); 1551 } 1552 if (xfs_sb_version_hasreflink(&mp->m_sb)) { 1553 xfs_alert(mp, 1554 "DAX and reflink cannot be used together!"); 1555 error = -EINVAL; 1556 goto out_filestream_unmount; 1557 } 1558 } 1559 1560 if (mp->m_flags & XFS_MOUNT_DISCARD) { 1561 struct request_queue *q = bdev_get_queue(sb->s_bdev); 1562 1563 if (!blk_queue_discard(q)) { 1564 xfs_warn(mp, "mounting with \"discard\" option, but " 1565 "the device does not support discard"); 1566 mp->m_flags &= ~XFS_MOUNT_DISCARD; 1567 } 1568 } 1569 1570 if (xfs_sb_version_hasreflink(&mp->m_sb)) { 1571 if (mp->m_sb.sb_rblocks) { 1572 xfs_alert(mp, 1573 "reflink not compatible with realtime device!"); 1574 error = -EINVAL; 1575 goto out_filestream_unmount; 1576 } 1577 1578 if (xfs_globals.always_cow) { 1579 xfs_info(mp, "using DEBUG-only always_cow mode."); 1580 mp->m_always_cow = true; 1581 } 1582 } 1583 1584 if (xfs_sb_version_hasrmapbt(&mp->m_sb) && mp->m_sb.sb_rblocks) { 1585 xfs_alert(mp, 1586 "reverse mapping btree not compatible with realtime device!"); 1587 error = -EINVAL; 1588 goto out_filestream_unmount; 1589 } 1590 1591 if (xfs_sb_version_hasinobtcounts(&mp->m_sb)) 1592 xfs_warn(mp, 1593 "EXPERIMENTAL inode btree counters feature in use. Use at your own risk!"); 1594 1595 error = xfs_mountfs(mp); 1596 if (error) 1597 goto out_filestream_unmount; 1598 1599 root = igrab(VFS_I(mp->m_rootip)); 1600 if (!root) { 1601 error = -ENOENT; 1602 goto out_unmount; 1603 } 1604 sb->s_root = d_make_root(root); 1605 if (!sb->s_root) { 1606 error = -ENOMEM; 1607 goto out_unmount; 1608 } 1609 1610 return 0; 1611 1612 out_filestream_unmount: 1613 xfs_filestream_unmount(mp); 1614 out_free_sb: 1615 xfs_freesb(mp); 1616 out_free_stats: 1617 free_percpu(mp->m_stats.xs_stats); 1618 out_destroy_counters: 1619 xfs_destroy_percpu_counters(mp); 1620 out_destroy_workqueues: 1621 xfs_destroy_mount_workqueues(mp); 1622 out_close_devices: 1623 xfs_close_devices(mp); 1624 out_free_names: 1625 sb->s_fs_info = NULL; 1626 xfs_mount_free(mp); 1627 return error; 1628 1629 out_unmount: 1630 xfs_filestream_unmount(mp); 1631 xfs_unmountfs(mp); 1632 goto out_free_sb; 1633 } 1634 1635 static int 1636 xfs_fs_get_tree( 1637 struct fs_context *fc) 1638 { 1639 return get_tree_bdev(fc, xfs_fs_fill_super); 1640 } 1641 1642 static int 1643 xfs_remount_rw( 1644 struct xfs_mount *mp) 1645 { 1646 struct xfs_sb *sbp = &mp->m_sb; 1647 int error; 1648 1649 if (mp->m_flags & XFS_MOUNT_NORECOVERY) { 1650 xfs_warn(mp, 1651 "ro->rw transition prohibited on norecovery mount"); 1652 return -EINVAL; 1653 } 1654 1655 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && 1656 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 1657 xfs_warn(mp, 1658 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem", 1659 (sbp->sb_features_ro_compat & 1660 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 1661 return -EINVAL; 1662 } 1663 1664 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1665 1666 /* 1667 * If this is the first remount to writeable state we might have some 1668 * superblock changes to update. 1669 */ 1670 if (mp->m_update_sb) { 1671 error = xfs_sync_sb(mp, false); 1672 if (error) { 1673 xfs_warn(mp, "failed to write sb changes"); 1674 return error; 1675 } 1676 mp->m_update_sb = false; 1677 } 1678 1679 /* 1680 * Fill out the reserve pool if it is empty. Use the stashed value if 1681 * it is non-zero, otherwise go with the default. 1682 */ 1683 xfs_restore_resvblks(mp); 1684 xfs_log_work_queue(mp); 1685 1686 /* Recover any CoW blocks that never got remapped. */ 1687 error = xfs_reflink_recover_cow(mp); 1688 if (error) { 1689 xfs_err(mp, 1690 "Error %d recovering leftover CoW allocations.", error); 1691 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 1692 return error; 1693 } 1694 xfs_blockgc_start(mp); 1695 1696 /* Create the per-AG metadata reservation pool .*/ 1697 error = xfs_fs_reserve_ag_blocks(mp); 1698 if (error && error != -ENOSPC) 1699 return error; 1700 1701 return 0; 1702 } 1703 1704 static int 1705 xfs_remount_ro( 1706 struct xfs_mount *mp) 1707 { 1708 int error; 1709 1710 /* 1711 * Cancel background eofb scanning so it cannot race with the final 1712 * log force+buftarg wait and deadlock the remount. 1713 */ 1714 xfs_blockgc_stop(mp); 1715 1716 /* Get rid of any leftover CoW reservations... */ 1717 error = xfs_blockgc_free_space(mp, NULL); 1718 if (error) { 1719 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 1720 return error; 1721 } 1722 1723 /* Free the per-AG metadata reservation pool. */ 1724 error = xfs_fs_unreserve_ag_blocks(mp); 1725 if (error) { 1726 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 1727 return error; 1728 } 1729 1730 /* 1731 * Before we sync the metadata, we need to free up the reserve block 1732 * pool so that the used block count in the superblock on disk is 1733 * correct at the end of the remount. Stash the current* reserve pool 1734 * size so that if we get remounted rw, we can return it to the same 1735 * size. 1736 */ 1737 xfs_save_resvblks(mp); 1738 1739 xfs_log_clean(mp); 1740 mp->m_flags |= XFS_MOUNT_RDONLY; 1741 1742 return 0; 1743 } 1744 1745 /* 1746 * Logically we would return an error here to prevent users from believing 1747 * they might have changed mount options using remount which can't be changed. 1748 * 1749 * But unfortunately mount(8) adds all options from mtab and fstab to the mount 1750 * arguments in some cases so we can't blindly reject options, but have to 1751 * check for each specified option if it actually differs from the currently 1752 * set option and only reject it if that's the case. 1753 * 1754 * Until that is implemented we return success for every remount request, and 1755 * silently ignore all options that we can't actually change. 1756 */ 1757 static int 1758 xfs_fs_reconfigure( 1759 struct fs_context *fc) 1760 { 1761 struct xfs_mount *mp = XFS_M(fc->root->d_sb); 1762 struct xfs_mount *new_mp = fc->s_fs_info; 1763 xfs_sb_t *sbp = &mp->m_sb; 1764 int flags = fc->sb_flags; 1765 int error; 1766 1767 /* version 5 superblocks always support version counters. */ 1768 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1769 fc->sb_flags |= SB_I_VERSION; 1770 1771 error = xfs_fs_validate_params(new_mp); 1772 if (error) 1773 return error; 1774 1775 sync_filesystem(mp->m_super); 1776 1777 /* inode32 -> inode64 */ 1778 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && 1779 !(new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) { 1780 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 1781 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount); 1782 } 1783 1784 /* inode64 -> inode32 */ 1785 if (!(mp->m_flags & XFS_MOUNT_SMALL_INUMS) && 1786 (new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) { 1787 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 1788 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount); 1789 } 1790 1791 /* ro -> rw */ 1792 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(flags & SB_RDONLY)) { 1793 error = xfs_remount_rw(mp); 1794 if (error) 1795 return error; 1796 } 1797 1798 /* rw -> ro */ 1799 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (flags & SB_RDONLY)) { 1800 error = xfs_remount_ro(mp); 1801 if (error) 1802 return error; 1803 } 1804 1805 return 0; 1806 } 1807 1808 static void xfs_fs_free( 1809 struct fs_context *fc) 1810 { 1811 struct xfs_mount *mp = fc->s_fs_info; 1812 1813 /* 1814 * mp is stored in the fs_context when it is initialized. 1815 * mp is transferred to the superblock on a successful mount, 1816 * but if an error occurs before the transfer we have to free 1817 * it here. 1818 */ 1819 if (mp) 1820 xfs_mount_free(mp); 1821 } 1822 1823 static const struct fs_context_operations xfs_context_ops = { 1824 .parse_param = xfs_fs_parse_param, 1825 .get_tree = xfs_fs_get_tree, 1826 .reconfigure = xfs_fs_reconfigure, 1827 .free = xfs_fs_free, 1828 }; 1829 1830 static int xfs_init_fs_context( 1831 struct fs_context *fc) 1832 { 1833 struct xfs_mount *mp; 1834 1835 mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO); 1836 if (!mp) 1837 return -ENOMEM; 1838 1839 spin_lock_init(&mp->m_sb_lock); 1840 spin_lock_init(&mp->m_agirotor_lock); 1841 INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); 1842 spin_lock_init(&mp->m_perag_lock); 1843 mutex_init(&mp->m_growlock); 1844 INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker); 1845 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1846 mp->m_kobj.kobject.kset = xfs_kset; 1847 /* 1848 * We don't create the finobt per-ag space reservation until after log 1849 * recovery, so we must set this to true so that an ifree transaction 1850 * started during log recovery will not depend on space reservations 1851 * for finobt expansion. 1852 */ 1853 mp->m_finobt_nores = true; 1854 1855 /* 1856 * These can be overridden by the mount option parsing. 1857 */ 1858 mp->m_logbufs = -1; 1859 mp->m_logbsize = -1; 1860 mp->m_allocsize_log = 16; /* 64k */ 1861 1862 /* 1863 * Copy binary VFS mount flags we are interested in. 1864 */ 1865 if (fc->sb_flags & SB_RDONLY) 1866 mp->m_flags |= XFS_MOUNT_RDONLY; 1867 if (fc->sb_flags & SB_DIRSYNC) 1868 mp->m_flags |= XFS_MOUNT_DIRSYNC; 1869 if (fc->sb_flags & SB_SYNCHRONOUS) 1870 mp->m_flags |= XFS_MOUNT_WSYNC; 1871 1872 fc->s_fs_info = mp; 1873 fc->ops = &xfs_context_ops; 1874 1875 return 0; 1876 } 1877 1878 static struct file_system_type xfs_fs_type = { 1879 .owner = THIS_MODULE, 1880 .name = "xfs", 1881 .init_fs_context = xfs_init_fs_context, 1882 .parameters = xfs_fs_parameters, 1883 .kill_sb = kill_block_super, 1884 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 1885 }; 1886 MODULE_ALIAS_FS("xfs"); 1887 1888 STATIC int __init 1889 xfs_init_zones(void) 1890 { 1891 xfs_log_ticket_zone = kmem_cache_create("xfs_log_ticket", 1892 sizeof(struct xlog_ticket), 1893 0, 0, NULL); 1894 if (!xfs_log_ticket_zone) 1895 goto out; 1896 1897 xfs_bmap_free_item_zone = kmem_cache_create("xfs_bmap_free_item", 1898 sizeof(struct xfs_extent_free_item), 1899 0, 0, NULL); 1900 if (!xfs_bmap_free_item_zone) 1901 goto out_destroy_log_ticket_zone; 1902 1903 xfs_btree_cur_zone = kmem_cache_create("xfs_btree_cur", 1904 sizeof(struct xfs_btree_cur), 1905 0, 0, NULL); 1906 if (!xfs_btree_cur_zone) 1907 goto out_destroy_bmap_free_item_zone; 1908 1909 xfs_da_state_zone = kmem_cache_create("xfs_da_state", 1910 sizeof(struct xfs_da_state), 1911 0, 0, NULL); 1912 if (!xfs_da_state_zone) 1913 goto out_destroy_btree_cur_zone; 1914 1915 xfs_ifork_zone = kmem_cache_create("xfs_ifork", 1916 sizeof(struct xfs_ifork), 1917 0, 0, NULL); 1918 if (!xfs_ifork_zone) 1919 goto out_destroy_da_state_zone; 1920 1921 xfs_trans_zone = kmem_cache_create("xf_trans", 1922 sizeof(struct xfs_trans), 1923 0, 0, NULL); 1924 if (!xfs_trans_zone) 1925 goto out_destroy_ifork_zone; 1926 1927 1928 /* 1929 * The size of the zone allocated buf log item is the maximum 1930 * size possible under XFS. This wastes a little bit of memory, 1931 * but it is much faster. 1932 */ 1933 xfs_buf_item_zone = kmem_cache_create("xfs_buf_item", 1934 sizeof(struct xfs_buf_log_item), 1935 0, 0, NULL); 1936 if (!xfs_buf_item_zone) 1937 goto out_destroy_trans_zone; 1938 1939 xfs_efd_zone = kmem_cache_create("xfs_efd_item", 1940 (sizeof(struct xfs_efd_log_item) + 1941 (XFS_EFD_MAX_FAST_EXTENTS - 1) * 1942 sizeof(struct xfs_extent)), 1943 0, 0, NULL); 1944 if (!xfs_efd_zone) 1945 goto out_destroy_buf_item_zone; 1946 1947 xfs_efi_zone = kmem_cache_create("xfs_efi_item", 1948 (sizeof(struct xfs_efi_log_item) + 1949 (XFS_EFI_MAX_FAST_EXTENTS - 1) * 1950 sizeof(struct xfs_extent)), 1951 0, 0, NULL); 1952 if (!xfs_efi_zone) 1953 goto out_destroy_efd_zone; 1954 1955 xfs_inode_zone = kmem_cache_create("xfs_inode", 1956 sizeof(struct xfs_inode), 0, 1957 (SLAB_HWCACHE_ALIGN | 1958 SLAB_RECLAIM_ACCOUNT | 1959 SLAB_MEM_SPREAD | SLAB_ACCOUNT), 1960 xfs_fs_inode_init_once); 1961 if (!xfs_inode_zone) 1962 goto out_destroy_efi_zone; 1963 1964 xfs_ili_zone = kmem_cache_create("xfs_ili", 1965 sizeof(struct xfs_inode_log_item), 0, 1966 SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, 1967 NULL); 1968 if (!xfs_ili_zone) 1969 goto out_destroy_inode_zone; 1970 1971 xfs_icreate_zone = kmem_cache_create("xfs_icr", 1972 sizeof(struct xfs_icreate_item), 1973 0, 0, NULL); 1974 if (!xfs_icreate_zone) 1975 goto out_destroy_ili_zone; 1976 1977 xfs_rud_zone = kmem_cache_create("xfs_rud_item", 1978 sizeof(struct xfs_rud_log_item), 1979 0, 0, NULL); 1980 if (!xfs_rud_zone) 1981 goto out_destroy_icreate_zone; 1982 1983 xfs_rui_zone = kmem_cache_create("xfs_rui_item", 1984 xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS), 1985 0, 0, NULL); 1986 if (!xfs_rui_zone) 1987 goto out_destroy_rud_zone; 1988 1989 xfs_cud_zone = kmem_cache_create("xfs_cud_item", 1990 sizeof(struct xfs_cud_log_item), 1991 0, 0, NULL); 1992 if (!xfs_cud_zone) 1993 goto out_destroy_rui_zone; 1994 1995 xfs_cui_zone = kmem_cache_create("xfs_cui_item", 1996 xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS), 1997 0, 0, NULL); 1998 if (!xfs_cui_zone) 1999 goto out_destroy_cud_zone; 2000 2001 xfs_bud_zone = kmem_cache_create("xfs_bud_item", 2002 sizeof(struct xfs_bud_log_item), 2003 0, 0, NULL); 2004 if (!xfs_bud_zone) 2005 goto out_destroy_cui_zone; 2006 2007 xfs_bui_zone = kmem_cache_create("xfs_bui_item", 2008 xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS), 2009 0, 0, NULL); 2010 if (!xfs_bui_zone) 2011 goto out_destroy_bud_zone; 2012 2013 return 0; 2014 2015 out_destroy_bud_zone: 2016 kmem_cache_destroy(xfs_bud_zone); 2017 out_destroy_cui_zone: 2018 kmem_cache_destroy(xfs_cui_zone); 2019 out_destroy_cud_zone: 2020 kmem_cache_destroy(xfs_cud_zone); 2021 out_destroy_rui_zone: 2022 kmem_cache_destroy(xfs_rui_zone); 2023 out_destroy_rud_zone: 2024 kmem_cache_destroy(xfs_rud_zone); 2025 out_destroy_icreate_zone: 2026 kmem_cache_destroy(xfs_icreate_zone); 2027 out_destroy_ili_zone: 2028 kmem_cache_destroy(xfs_ili_zone); 2029 out_destroy_inode_zone: 2030 kmem_cache_destroy(xfs_inode_zone); 2031 out_destroy_efi_zone: 2032 kmem_cache_destroy(xfs_efi_zone); 2033 out_destroy_efd_zone: 2034 kmem_cache_destroy(xfs_efd_zone); 2035 out_destroy_buf_item_zone: 2036 kmem_cache_destroy(xfs_buf_item_zone); 2037 out_destroy_trans_zone: 2038 kmem_cache_destroy(xfs_trans_zone); 2039 out_destroy_ifork_zone: 2040 kmem_cache_destroy(xfs_ifork_zone); 2041 out_destroy_da_state_zone: 2042 kmem_cache_destroy(xfs_da_state_zone); 2043 out_destroy_btree_cur_zone: 2044 kmem_cache_destroy(xfs_btree_cur_zone); 2045 out_destroy_bmap_free_item_zone: 2046 kmem_cache_destroy(xfs_bmap_free_item_zone); 2047 out_destroy_log_ticket_zone: 2048 kmem_cache_destroy(xfs_log_ticket_zone); 2049 out: 2050 return -ENOMEM; 2051 } 2052 2053 STATIC void 2054 xfs_destroy_zones(void) 2055 { 2056 /* 2057 * Make sure all delayed rcu free are flushed before we 2058 * destroy caches. 2059 */ 2060 rcu_barrier(); 2061 kmem_cache_destroy(xfs_bui_zone); 2062 kmem_cache_destroy(xfs_bud_zone); 2063 kmem_cache_destroy(xfs_cui_zone); 2064 kmem_cache_destroy(xfs_cud_zone); 2065 kmem_cache_destroy(xfs_rui_zone); 2066 kmem_cache_destroy(xfs_rud_zone); 2067 kmem_cache_destroy(xfs_icreate_zone); 2068 kmem_cache_destroy(xfs_ili_zone); 2069 kmem_cache_destroy(xfs_inode_zone); 2070 kmem_cache_destroy(xfs_efi_zone); 2071 kmem_cache_destroy(xfs_efd_zone); 2072 kmem_cache_destroy(xfs_buf_item_zone); 2073 kmem_cache_destroy(xfs_trans_zone); 2074 kmem_cache_destroy(xfs_ifork_zone); 2075 kmem_cache_destroy(xfs_da_state_zone); 2076 kmem_cache_destroy(xfs_btree_cur_zone); 2077 kmem_cache_destroy(xfs_bmap_free_item_zone); 2078 kmem_cache_destroy(xfs_log_ticket_zone); 2079 } 2080 2081 STATIC int __init 2082 xfs_init_workqueues(void) 2083 { 2084 /* 2085 * The allocation workqueue can be used in memory reclaim situations 2086 * (writepage path), and parallelism is only limited by the number of 2087 * AGs in all the filesystems mounted. Hence use the default large 2088 * max_active value for this workqueue. 2089 */ 2090 xfs_alloc_wq = alloc_workqueue("xfsalloc", 2091 XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0); 2092 if (!xfs_alloc_wq) 2093 return -ENOMEM; 2094 2095 xfs_discard_wq = alloc_workqueue("xfsdiscard", XFS_WQFLAGS(WQ_UNBOUND), 2096 0); 2097 if (!xfs_discard_wq) 2098 goto out_free_alloc_wq; 2099 2100 return 0; 2101 out_free_alloc_wq: 2102 destroy_workqueue(xfs_alloc_wq); 2103 return -ENOMEM; 2104 } 2105 2106 STATIC void 2107 xfs_destroy_workqueues(void) 2108 { 2109 destroy_workqueue(xfs_discard_wq); 2110 destroy_workqueue(xfs_alloc_wq); 2111 } 2112 2113 STATIC int __init 2114 init_xfs_fs(void) 2115 { 2116 int error; 2117 2118 xfs_check_ondisk_structs(); 2119 2120 printk(KERN_INFO XFS_VERSION_STRING " with " 2121 XFS_BUILD_OPTIONS " enabled\n"); 2122 2123 xfs_dir_startup(); 2124 2125 error = xfs_init_zones(); 2126 if (error) 2127 goto out; 2128 2129 error = xfs_init_workqueues(); 2130 if (error) 2131 goto out_destroy_zones; 2132 2133 error = xfs_mru_cache_init(); 2134 if (error) 2135 goto out_destroy_wq; 2136 2137 error = xfs_buf_init(); 2138 if (error) 2139 goto out_mru_cache_uninit; 2140 2141 error = xfs_init_procfs(); 2142 if (error) 2143 goto out_buf_terminate; 2144 2145 error = xfs_sysctl_register(); 2146 if (error) 2147 goto out_cleanup_procfs; 2148 2149 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj); 2150 if (!xfs_kset) { 2151 error = -ENOMEM; 2152 goto out_sysctl_unregister; 2153 } 2154 2155 xfsstats.xs_kobj.kobject.kset = xfs_kset; 2156 2157 xfsstats.xs_stats = alloc_percpu(struct xfsstats); 2158 if (!xfsstats.xs_stats) { 2159 error = -ENOMEM; 2160 goto out_kset_unregister; 2161 } 2162 2163 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL, 2164 "stats"); 2165 if (error) 2166 goto out_free_stats; 2167 2168 #ifdef DEBUG 2169 xfs_dbg_kobj.kobject.kset = xfs_kset; 2170 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug"); 2171 if (error) 2172 goto out_remove_stats_kobj; 2173 #endif 2174 2175 error = xfs_qm_init(); 2176 if (error) 2177 goto out_remove_dbg_kobj; 2178 2179 error = register_filesystem(&xfs_fs_type); 2180 if (error) 2181 goto out_qm_exit; 2182 return 0; 2183 2184 out_qm_exit: 2185 xfs_qm_exit(); 2186 out_remove_dbg_kobj: 2187 #ifdef DEBUG 2188 xfs_sysfs_del(&xfs_dbg_kobj); 2189 out_remove_stats_kobj: 2190 #endif 2191 xfs_sysfs_del(&xfsstats.xs_kobj); 2192 out_free_stats: 2193 free_percpu(xfsstats.xs_stats); 2194 out_kset_unregister: 2195 kset_unregister(xfs_kset); 2196 out_sysctl_unregister: 2197 xfs_sysctl_unregister(); 2198 out_cleanup_procfs: 2199 xfs_cleanup_procfs(); 2200 out_buf_terminate: 2201 xfs_buf_terminate(); 2202 out_mru_cache_uninit: 2203 xfs_mru_cache_uninit(); 2204 out_destroy_wq: 2205 xfs_destroy_workqueues(); 2206 out_destroy_zones: 2207 xfs_destroy_zones(); 2208 out: 2209 return error; 2210 } 2211 2212 STATIC void __exit 2213 exit_xfs_fs(void) 2214 { 2215 xfs_qm_exit(); 2216 unregister_filesystem(&xfs_fs_type); 2217 #ifdef DEBUG 2218 xfs_sysfs_del(&xfs_dbg_kobj); 2219 #endif 2220 xfs_sysfs_del(&xfsstats.xs_kobj); 2221 free_percpu(xfsstats.xs_stats); 2222 kset_unregister(xfs_kset); 2223 xfs_sysctl_unregister(); 2224 xfs_cleanup_procfs(); 2225 xfs_buf_terminate(); 2226 xfs_mru_cache_uninit(); 2227 xfs_destroy_workqueues(); 2228 xfs_destroy_zones(); 2229 xfs_uuid_table_free(); 2230 } 2231 2232 module_init(init_xfs_fs); 2233 module_exit(exit_xfs_fs); 2234 2235 MODULE_AUTHOR("Silicon Graphics, Inc."); 2236 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 2237 MODULE_LICENSE("GPL"); 2238