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 #include "xfs_ag.h" 40 41 #include <linux/magic.h> 42 #include <linux/fs_context.h> 43 #include <linux/fs_parser.h> 44 45 static const struct super_operations xfs_super_operations; 46 47 static struct kset *xfs_kset; /* top-level xfs sysfs dir */ 48 #ifdef DEBUG 49 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ 50 #endif 51 52 #ifdef CONFIG_HOTPLUG_CPU 53 static LIST_HEAD(xfs_mount_list); 54 static DEFINE_SPINLOCK(xfs_mount_list_lock); 55 56 static inline void xfs_mount_list_add(struct xfs_mount *mp) 57 { 58 spin_lock(&xfs_mount_list_lock); 59 list_add(&mp->m_mount_list, &xfs_mount_list); 60 spin_unlock(&xfs_mount_list_lock); 61 } 62 63 static inline void xfs_mount_list_del(struct xfs_mount *mp) 64 { 65 spin_lock(&xfs_mount_list_lock); 66 list_del(&mp->m_mount_list); 67 spin_unlock(&xfs_mount_list_lock); 68 } 69 #else /* !CONFIG_HOTPLUG_CPU */ 70 static inline void xfs_mount_list_add(struct xfs_mount *mp) {} 71 static inline void xfs_mount_list_del(struct xfs_mount *mp) {} 72 #endif 73 74 enum xfs_dax_mode { 75 XFS_DAX_INODE = 0, 76 XFS_DAX_ALWAYS = 1, 77 XFS_DAX_NEVER = 2, 78 }; 79 80 static void 81 xfs_mount_set_dax_mode( 82 struct xfs_mount *mp, 83 enum xfs_dax_mode mode) 84 { 85 switch (mode) { 86 case XFS_DAX_INODE: 87 mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER); 88 break; 89 case XFS_DAX_ALWAYS: 90 mp->m_features |= XFS_FEAT_DAX_ALWAYS; 91 mp->m_features &= ~XFS_FEAT_DAX_NEVER; 92 break; 93 case XFS_DAX_NEVER: 94 mp->m_features |= XFS_FEAT_DAX_NEVER; 95 mp->m_features &= ~XFS_FEAT_DAX_ALWAYS; 96 break; 97 } 98 } 99 100 static const struct constant_table dax_param_enums[] = { 101 {"inode", XFS_DAX_INODE }, 102 {"always", XFS_DAX_ALWAYS }, 103 {"never", XFS_DAX_NEVER }, 104 {} 105 }; 106 107 /* 108 * Table driven mount option parser. 109 */ 110 enum { 111 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, 112 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid, 113 Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups, 114 Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep, 115 Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2, 116 Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, 117 Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota, 118 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce, 119 Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, 120 }; 121 122 static const struct fs_parameter_spec xfs_fs_parameters[] = { 123 fsparam_u32("logbufs", Opt_logbufs), 124 fsparam_string("logbsize", Opt_logbsize), 125 fsparam_string("logdev", Opt_logdev), 126 fsparam_string("rtdev", Opt_rtdev), 127 fsparam_flag("wsync", Opt_wsync), 128 fsparam_flag("noalign", Opt_noalign), 129 fsparam_flag("swalloc", Opt_swalloc), 130 fsparam_u32("sunit", Opt_sunit), 131 fsparam_u32("swidth", Opt_swidth), 132 fsparam_flag("nouuid", Opt_nouuid), 133 fsparam_flag("grpid", Opt_grpid), 134 fsparam_flag("nogrpid", Opt_nogrpid), 135 fsparam_flag("bsdgroups", Opt_bsdgroups), 136 fsparam_flag("sysvgroups", Opt_sysvgroups), 137 fsparam_string("allocsize", Opt_allocsize), 138 fsparam_flag("norecovery", Opt_norecovery), 139 fsparam_flag("inode64", Opt_inode64), 140 fsparam_flag("inode32", Opt_inode32), 141 fsparam_flag("ikeep", Opt_ikeep), 142 fsparam_flag("noikeep", Opt_noikeep), 143 fsparam_flag("largeio", Opt_largeio), 144 fsparam_flag("nolargeio", Opt_nolargeio), 145 fsparam_flag("attr2", Opt_attr2), 146 fsparam_flag("noattr2", Opt_noattr2), 147 fsparam_flag("filestreams", Opt_filestreams), 148 fsparam_flag("quota", Opt_quota), 149 fsparam_flag("noquota", Opt_noquota), 150 fsparam_flag("usrquota", Opt_usrquota), 151 fsparam_flag("grpquota", Opt_grpquota), 152 fsparam_flag("prjquota", Opt_prjquota), 153 fsparam_flag("uquota", Opt_uquota), 154 fsparam_flag("gquota", Opt_gquota), 155 fsparam_flag("pquota", Opt_pquota), 156 fsparam_flag("uqnoenforce", Opt_uqnoenforce), 157 fsparam_flag("gqnoenforce", Opt_gqnoenforce), 158 fsparam_flag("pqnoenforce", Opt_pqnoenforce), 159 fsparam_flag("qnoenforce", Opt_qnoenforce), 160 fsparam_flag("discard", Opt_discard), 161 fsparam_flag("nodiscard", Opt_nodiscard), 162 fsparam_flag("dax", Opt_dax), 163 fsparam_enum("dax", Opt_dax_enum, dax_param_enums), 164 {} 165 }; 166 167 struct proc_xfs_info { 168 uint64_t flag; 169 char *str; 170 }; 171 172 static int 173 xfs_fs_show_options( 174 struct seq_file *m, 175 struct dentry *root) 176 { 177 static struct proc_xfs_info xfs_info_set[] = { 178 /* the few simple ones we can get from the mount struct */ 179 { XFS_FEAT_IKEEP, ",ikeep" }, 180 { XFS_FEAT_WSYNC, ",wsync" }, 181 { XFS_FEAT_NOALIGN, ",noalign" }, 182 { XFS_FEAT_SWALLOC, ",swalloc" }, 183 { XFS_FEAT_NOUUID, ",nouuid" }, 184 { XFS_FEAT_NORECOVERY, ",norecovery" }, 185 { XFS_FEAT_ATTR2, ",attr2" }, 186 { XFS_FEAT_FILESTREAMS, ",filestreams" }, 187 { XFS_FEAT_GRPID, ",grpid" }, 188 { XFS_FEAT_DISCARD, ",discard" }, 189 { XFS_FEAT_LARGE_IOSIZE, ",largeio" }, 190 { XFS_FEAT_DAX_ALWAYS, ",dax=always" }, 191 { XFS_FEAT_DAX_NEVER, ",dax=never" }, 192 { 0, NULL } 193 }; 194 struct xfs_mount *mp = XFS_M(root->d_sb); 195 struct proc_xfs_info *xfs_infop; 196 197 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 198 if (mp->m_features & xfs_infop->flag) 199 seq_puts(m, xfs_infop->str); 200 } 201 202 seq_printf(m, ",inode%d", xfs_has_small_inums(mp) ? 32 : 64); 203 204 if (xfs_has_allocsize(mp)) 205 seq_printf(m, ",allocsize=%dk", 206 (1 << mp->m_allocsize_log) >> 10); 207 208 if (mp->m_logbufs > 0) 209 seq_printf(m, ",logbufs=%d", mp->m_logbufs); 210 if (mp->m_logbsize > 0) 211 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10); 212 213 if (mp->m_logname) 214 seq_show_option(m, "logdev", mp->m_logname); 215 if (mp->m_rtname) 216 seq_show_option(m, "rtdev", mp->m_rtname); 217 218 if (mp->m_dalign > 0) 219 seq_printf(m, ",sunit=%d", 220 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 221 if (mp->m_swidth > 0) 222 seq_printf(m, ",swidth=%d", 223 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 224 225 if (mp->m_qflags & XFS_UQUOTA_ENFD) 226 seq_puts(m, ",usrquota"); 227 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 228 seq_puts(m, ",uqnoenforce"); 229 230 if (mp->m_qflags & XFS_PQUOTA_ENFD) 231 seq_puts(m, ",prjquota"); 232 else if (mp->m_qflags & XFS_PQUOTA_ACCT) 233 seq_puts(m, ",pqnoenforce"); 234 235 if (mp->m_qflags & XFS_GQUOTA_ENFD) 236 seq_puts(m, ",grpquota"); 237 else if (mp->m_qflags & XFS_GQUOTA_ACCT) 238 seq_puts(m, ",gqnoenforce"); 239 240 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 241 seq_puts(m, ",noquota"); 242 243 return 0; 244 } 245 246 /* 247 * Set parameters for inode allocation heuristics, taking into account 248 * filesystem size and inode32/inode64 mount options; i.e. specifically 249 * whether or not XFS_FEAT_SMALL_INUMS is set. 250 * 251 * Inode allocation patterns are altered only if inode32 is requested 252 * (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large. 253 * If altered, XFS_OPSTATE_INODE32 is set as well. 254 * 255 * An agcount independent of that in the mount structure is provided 256 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated 257 * to the potentially higher ag count. 258 * 259 * Returns the maximum AG index which may contain inodes. 260 */ 261 xfs_agnumber_t 262 xfs_set_inode_alloc( 263 struct xfs_mount *mp, 264 xfs_agnumber_t agcount) 265 { 266 xfs_agnumber_t index; 267 xfs_agnumber_t maxagi = 0; 268 xfs_sb_t *sbp = &mp->m_sb; 269 xfs_agnumber_t max_metadata; 270 xfs_agino_t agino; 271 xfs_ino_t ino; 272 273 /* 274 * Calculate how much should be reserved for inodes to meet 275 * the max inode percentage. Used only for inode32. 276 */ 277 if (M_IGEO(mp)->maxicount) { 278 uint64_t icount; 279 280 icount = sbp->sb_dblocks * sbp->sb_imax_pct; 281 do_div(icount, 100); 282 icount += sbp->sb_agblocks - 1; 283 do_div(icount, sbp->sb_agblocks); 284 max_metadata = icount; 285 } else { 286 max_metadata = agcount; 287 } 288 289 /* Get the last possible inode in the filesystem */ 290 agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1); 291 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); 292 293 /* 294 * If user asked for no more than 32-bit inodes, and the fs is 295 * sufficiently large, set XFS_OPSTATE_INODE32 if we must alter 296 * the allocator to accommodate the request. 297 */ 298 if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32) 299 set_bit(XFS_OPSTATE_INODE32, &mp->m_opstate); 300 else 301 clear_bit(XFS_OPSTATE_INODE32, &mp->m_opstate); 302 303 for (index = 0; index < agcount; index++) { 304 struct xfs_perag *pag; 305 306 ino = XFS_AGINO_TO_INO(mp, index, agino); 307 308 pag = xfs_perag_get(mp, index); 309 310 if (xfs_is_inode32(mp)) { 311 if (ino > XFS_MAXINUMBER_32) { 312 pag->pagi_inodeok = 0; 313 pag->pagf_metadata = 0; 314 } else { 315 pag->pagi_inodeok = 1; 316 maxagi++; 317 if (index < max_metadata) 318 pag->pagf_metadata = 1; 319 else 320 pag->pagf_metadata = 0; 321 } 322 } else { 323 pag->pagi_inodeok = 1; 324 pag->pagf_metadata = 0; 325 } 326 327 xfs_perag_put(pag); 328 } 329 330 return xfs_is_inode32(mp) ? maxagi : agcount; 331 } 332 333 STATIC int 334 xfs_blkdev_get( 335 xfs_mount_t *mp, 336 const char *name, 337 struct block_device **bdevp) 338 { 339 int error = 0; 340 341 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 342 mp); 343 if (IS_ERR(*bdevp)) { 344 error = PTR_ERR(*bdevp); 345 xfs_warn(mp, "Invalid device [%s], error=%d", name, error); 346 } 347 348 return error; 349 } 350 351 STATIC void 352 xfs_blkdev_put( 353 struct block_device *bdev) 354 { 355 if (bdev) 356 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 357 } 358 359 STATIC void 360 xfs_close_devices( 361 struct xfs_mount *mp) 362 { 363 struct dax_device *dax_ddev = mp->m_ddev_targp->bt_daxdev; 364 365 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 366 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 367 struct dax_device *dax_logdev = mp->m_logdev_targp->bt_daxdev; 368 369 xfs_free_buftarg(mp->m_logdev_targp); 370 xfs_blkdev_put(logdev); 371 fs_put_dax(dax_logdev); 372 } 373 if (mp->m_rtdev_targp) { 374 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 375 struct dax_device *dax_rtdev = mp->m_rtdev_targp->bt_daxdev; 376 377 xfs_free_buftarg(mp->m_rtdev_targp); 378 xfs_blkdev_put(rtdev); 379 fs_put_dax(dax_rtdev); 380 } 381 xfs_free_buftarg(mp->m_ddev_targp); 382 fs_put_dax(dax_ddev); 383 } 384 385 /* 386 * The file system configurations are: 387 * (1) device (partition) with data and internal log 388 * (2) logical volume with data and log subvolumes. 389 * (3) logical volume with data, log, and realtime subvolumes. 390 * 391 * We only have to handle opening the log and realtime volumes here if 392 * they are present. The data subvolume has already been opened by 393 * get_sb_bdev() and is stored in sb->s_bdev. 394 */ 395 STATIC int 396 xfs_open_devices( 397 struct xfs_mount *mp) 398 { 399 struct block_device *ddev = mp->m_super->s_bdev; 400 struct dax_device *dax_ddev = fs_dax_get_by_bdev(ddev); 401 struct dax_device *dax_logdev = NULL, *dax_rtdev = NULL; 402 struct block_device *logdev = NULL, *rtdev = NULL; 403 int error; 404 405 /* 406 * Open real time and log devices - order is important. 407 */ 408 if (mp->m_logname) { 409 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 410 if (error) 411 goto out; 412 dax_logdev = fs_dax_get_by_bdev(logdev); 413 } 414 415 if (mp->m_rtname) { 416 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 417 if (error) 418 goto out_close_logdev; 419 420 if (rtdev == ddev || rtdev == logdev) { 421 xfs_warn(mp, 422 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 423 error = -EINVAL; 424 goto out_close_rtdev; 425 } 426 dax_rtdev = fs_dax_get_by_bdev(rtdev); 427 } 428 429 /* 430 * Setup xfs_mount buffer target pointers 431 */ 432 error = -ENOMEM; 433 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, dax_ddev); 434 if (!mp->m_ddev_targp) 435 goto out_close_rtdev; 436 437 if (rtdev) { 438 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, dax_rtdev); 439 if (!mp->m_rtdev_targp) 440 goto out_free_ddev_targ; 441 } 442 443 if (logdev && logdev != ddev) { 444 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, dax_logdev); 445 if (!mp->m_logdev_targp) 446 goto out_free_rtdev_targ; 447 } else { 448 mp->m_logdev_targp = mp->m_ddev_targp; 449 } 450 451 return 0; 452 453 out_free_rtdev_targ: 454 if (mp->m_rtdev_targp) 455 xfs_free_buftarg(mp->m_rtdev_targp); 456 out_free_ddev_targ: 457 xfs_free_buftarg(mp->m_ddev_targp); 458 out_close_rtdev: 459 xfs_blkdev_put(rtdev); 460 fs_put_dax(dax_rtdev); 461 out_close_logdev: 462 if (logdev && logdev != ddev) { 463 xfs_blkdev_put(logdev); 464 fs_put_dax(dax_logdev); 465 } 466 out: 467 fs_put_dax(dax_ddev); 468 return error; 469 } 470 471 /* 472 * Setup xfs_mount buffer target pointers based on superblock 473 */ 474 STATIC int 475 xfs_setup_devices( 476 struct xfs_mount *mp) 477 { 478 int error; 479 480 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize); 481 if (error) 482 return error; 483 484 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 485 unsigned int log_sector_size = BBSIZE; 486 487 if (xfs_has_sector(mp)) 488 log_sector_size = mp->m_sb.sb_logsectsize; 489 error = xfs_setsize_buftarg(mp->m_logdev_targp, 490 log_sector_size); 491 if (error) 492 return error; 493 } 494 if (mp->m_rtdev_targp) { 495 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 496 mp->m_sb.sb_sectsize); 497 if (error) 498 return error; 499 } 500 501 return 0; 502 } 503 504 STATIC int 505 xfs_init_mount_workqueues( 506 struct xfs_mount *mp) 507 { 508 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s", 509 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 510 1, mp->m_super->s_id); 511 if (!mp->m_buf_workqueue) 512 goto out; 513 514 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 515 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 516 0, mp->m_super->s_id); 517 if (!mp->m_unwritten_workqueue) 518 goto out_destroy_buf; 519 520 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 521 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 522 0, mp->m_super->s_id); 523 if (!mp->m_reclaim_workqueue) 524 goto out_destroy_unwritten; 525 526 mp->m_blockgc_wq = alloc_workqueue("xfs-blockgc/%s", 527 XFS_WQFLAGS(WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM), 528 0, mp->m_super->s_id); 529 if (!mp->m_blockgc_wq) 530 goto out_destroy_reclaim; 531 532 mp->m_inodegc_wq = alloc_workqueue("xfs-inodegc/%s", 533 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 534 1, mp->m_super->s_id); 535 if (!mp->m_inodegc_wq) 536 goto out_destroy_blockgc; 537 538 mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", 539 XFS_WQFLAGS(WQ_FREEZABLE), 0, mp->m_super->s_id); 540 if (!mp->m_sync_workqueue) 541 goto out_destroy_inodegc; 542 543 return 0; 544 545 out_destroy_inodegc: 546 destroy_workqueue(mp->m_inodegc_wq); 547 out_destroy_blockgc: 548 destroy_workqueue(mp->m_blockgc_wq); 549 out_destroy_reclaim: 550 destroy_workqueue(mp->m_reclaim_workqueue); 551 out_destroy_unwritten: 552 destroy_workqueue(mp->m_unwritten_workqueue); 553 out_destroy_buf: 554 destroy_workqueue(mp->m_buf_workqueue); 555 out: 556 return -ENOMEM; 557 } 558 559 STATIC void 560 xfs_destroy_mount_workqueues( 561 struct xfs_mount *mp) 562 { 563 destroy_workqueue(mp->m_sync_workqueue); 564 destroy_workqueue(mp->m_blockgc_wq); 565 destroy_workqueue(mp->m_inodegc_wq); 566 destroy_workqueue(mp->m_reclaim_workqueue); 567 destroy_workqueue(mp->m_unwritten_workqueue); 568 destroy_workqueue(mp->m_buf_workqueue); 569 } 570 571 static void 572 xfs_flush_inodes_worker( 573 struct work_struct *work) 574 { 575 struct xfs_mount *mp = container_of(work, struct xfs_mount, 576 m_flush_inodes_work); 577 struct super_block *sb = mp->m_super; 578 579 if (down_read_trylock(&sb->s_umount)) { 580 sync_inodes_sb(sb); 581 up_read(&sb->s_umount); 582 } 583 } 584 585 /* 586 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 587 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 588 * for IO to complete so that we effectively throttle multiple callers to the 589 * rate at which IO is completing. 590 */ 591 void 592 xfs_flush_inodes( 593 struct xfs_mount *mp) 594 { 595 /* 596 * If flush_work() returns true then that means we waited for a flush 597 * which was already in progress. Don't bother running another scan. 598 */ 599 if (flush_work(&mp->m_flush_inodes_work)) 600 return; 601 602 queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work); 603 flush_work(&mp->m_flush_inodes_work); 604 } 605 606 /* Catch misguided souls that try to use this interface on XFS */ 607 STATIC struct inode * 608 xfs_fs_alloc_inode( 609 struct super_block *sb) 610 { 611 BUG(); 612 return NULL; 613 } 614 615 /* 616 * Now that the generic code is guaranteed not to be accessing 617 * the linux inode, we can inactivate and reclaim the inode. 618 */ 619 STATIC void 620 xfs_fs_destroy_inode( 621 struct inode *inode) 622 { 623 struct xfs_inode *ip = XFS_I(inode); 624 625 trace_xfs_destroy_inode(ip); 626 627 ASSERT(!rwsem_is_locked(&inode->i_rwsem)); 628 XFS_STATS_INC(ip->i_mount, vn_rele); 629 XFS_STATS_INC(ip->i_mount, vn_remove); 630 xfs_inode_mark_reclaimable(ip); 631 } 632 633 static void 634 xfs_fs_dirty_inode( 635 struct inode *inode, 636 int flag) 637 { 638 struct xfs_inode *ip = XFS_I(inode); 639 struct xfs_mount *mp = ip->i_mount; 640 struct xfs_trans *tp; 641 642 if (!(inode->i_sb->s_flags & SB_LAZYTIME)) 643 return; 644 if (flag != I_DIRTY_SYNC || !(inode->i_state & I_DIRTY_TIME)) 645 return; 646 647 if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp)) 648 return; 649 xfs_ilock(ip, XFS_ILOCK_EXCL); 650 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 651 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); 652 xfs_trans_commit(tp); 653 } 654 655 /* 656 * Slab object creation initialisation for the XFS inode. 657 * This covers only the idempotent fields in the XFS inode; 658 * all other fields need to be initialised on allocation 659 * from the slab. This avoids the need to repeatedly initialise 660 * fields in the xfs inode that left in the initialise state 661 * when freeing the inode. 662 */ 663 STATIC void 664 xfs_fs_inode_init_once( 665 void *inode) 666 { 667 struct xfs_inode *ip = inode; 668 669 memset(ip, 0, sizeof(struct xfs_inode)); 670 671 /* vfs inode */ 672 inode_init_once(VFS_I(ip)); 673 674 /* xfs inode */ 675 atomic_set(&ip->i_pincount, 0); 676 spin_lock_init(&ip->i_flags_lock); 677 678 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 679 "xfsino", ip->i_ino); 680 } 681 682 /* 683 * We do an unlocked check for XFS_IDONTCACHE here because we are already 684 * serialised against cache hits here via the inode->i_lock and igrab() in 685 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 686 * racing with us, and it avoids needing to grab a spinlock here for every inode 687 * we drop the final reference on. 688 */ 689 STATIC int 690 xfs_fs_drop_inode( 691 struct inode *inode) 692 { 693 struct xfs_inode *ip = XFS_I(inode); 694 695 /* 696 * If this unlinked inode is in the middle of recovery, don't 697 * drop the inode just yet; log recovery will take care of 698 * that. See the comment for this inode flag. 699 */ 700 if (ip->i_flags & XFS_IRECOVERY) { 701 ASSERT(xlog_recovery_needed(ip->i_mount->m_log)); 702 return 0; 703 } 704 705 return generic_drop_inode(inode); 706 } 707 708 static void 709 xfs_mount_free( 710 struct xfs_mount *mp) 711 { 712 kfree(mp->m_rtname); 713 kfree(mp->m_logname); 714 kmem_free(mp); 715 } 716 717 STATIC int 718 xfs_fs_sync_fs( 719 struct super_block *sb, 720 int wait) 721 { 722 struct xfs_mount *mp = XFS_M(sb); 723 724 trace_xfs_fs_sync_fs(mp, __return_address); 725 726 /* 727 * Doing anything during the async pass would be counterproductive. 728 */ 729 if (!wait) 730 return 0; 731 732 xfs_log_force(mp, XFS_LOG_SYNC); 733 if (laptop_mode) { 734 /* 735 * The disk must be active because we're syncing. 736 * We schedule log work now (now that the disk is 737 * active) instead of later (when it might not be). 738 */ 739 flush_delayed_work(&mp->m_log->l_work); 740 } 741 742 /* 743 * If we are called with page faults frozen out, it means we are about 744 * to freeze the transaction subsystem. Take the opportunity to shut 745 * down inodegc because once SB_FREEZE_FS is set it's too late to 746 * prevent inactivation races with freeze. The fs doesn't get called 747 * again by the freezing process until after SB_FREEZE_FS has been set, 748 * so it's now or never. Same logic applies to speculative allocation 749 * garbage collection. 750 * 751 * We don't care if this is a normal syncfs call that does this or 752 * freeze that does this - we can run this multiple times without issue 753 * and we won't race with a restart because a restart can only occur 754 * when the state is either SB_FREEZE_FS or SB_FREEZE_COMPLETE. 755 */ 756 if (sb->s_writers.frozen == SB_FREEZE_PAGEFAULT) { 757 xfs_inodegc_stop(mp); 758 xfs_blockgc_stop(mp); 759 } 760 761 return 0; 762 } 763 764 STATIC int 765 xfs_fs_statfs( 766 struct dentry *dentry, 767 struct kstatfs *statp) 768 { 769 struct xfs_mount *mp = XFS_M(dentry->d_sb); 770 xfs_sb_t *sbp = &mp->m_sb; 771 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 772 uint64_t fakeinos, id; 773 uint64_t icount; 774 uint64_t ifree; 775 uint64_t fdblocks; 776 xfs_extlen_t lsize; 777 int64_t ffree; 778 779 /* Wait for whatever inactivations are in progress. */ 780 xfs_inodegc_flush(mp); 781 782 statp->f_type = XFS_SUPER_MAGIC; 783 statp->f_namelen = MAXNAMELEN - 1; 784 785 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 786 statp->f_fsid = u64_to_fsid(id); 787 788 icount = percpu_counter_sum(&mp->m_icount); 789 ifree = percpu_counter_sum(&mp->m_ifree); 790 fdblocks = percpu_counter_sum(&mp->m_fdblocks); 791 792 spin_lock(&mp->m_sb_lock); 793 statp->f_bsize = sbp->sb_blocksize; 794 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 795 statp->f_blocks = sbp->sb_dblocks - lsize; 796 spin_unlock(&mp->m_sb_lock); 797 798 /* make sure statp->f_bfree does not underflow */ 799 statp->f_bfree = max_t(int64_t, fdblocks - mp->m_alloc_set_aside, 0); 800 statp->f_bavail = statp->f_bfree; 801 802 fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree); 803 statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER); 804 if (M_IGEO(mp)->maxicount) 805 statp->f_files = min_t(typeof(statp->f_files), 806 statp->f_files, 807 M_IGEO(mp)->maxicount); 808 809 /* If sb_icount overshot maxicount, report actual allocation */ 810 statp->f_files = max_t(typeof(statp->f_files), 811 statp->f_files, 812 sbp->sb_icount); 813 814 /* make sure statp->f_ffree does not underflow */ 815 ffree = statp->f_files - (icount - ifree); 816 statp->f_ffree = max_t(int64_t, ffree, 0); 817 818 819 if ((ip->i_diflags & XFS_DIFLAG_PROJINHERIT) && 820 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 821 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 822 xfs_qm_statvfs(ip, statp); 823 824 if (XFS_IS_REALTIME_MOUNT(mp) && 825 (ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) { 826 statp->f_blocks = sbp->sb_rblocks; 827 statp->f_bavail = statp->f_bfree = 828 sbp->sb_frextents * sbp->sb_rextsize; 829 } 830 831 return 0; 832 } 833 834 STATIC void 835 xfs_save_resvblks(struct xfs_mount *mp) 836 { 837 uint64_t resblks = 0; 838 839 mp->m_resblks_save = mp->m_resblks; 840 xfs_reserve_blocks(mp, &resblks, NULL); 841 } 842 843 STATIC void 844 xfs_restore_resvblks(struct xfs_mount *mp) 845 { 846 uint64_t resblks; 847 848 if (mp->m_resblks_save) { 849 resblks = mp->m_resblks_save; 850 mp->m_resblks_save = 0; 851 } else 852 resblks = xfs_default_resblks(mp); 853 854 xfs_reserve_blocks(mp, &resblks, NULL); 855 } 856 857 /* 858 * Second stage of a freeze. The data is already frozen so we only 859 * need to take care of the metadata. Once that's done sync the superblock 860 * to the log to dirty it in case of a crash while frozen. This ensures that we 861 * will recover the unlinked inode lists on the next mount. 862 */ 863 STATIC int 864 xfs_fs_freeze( 865 struct super_block *sb) 866 { 867 struct xfs_mount *mp = XFS_M(sb); 868 unsigned int flags; 869 int ret; 870 871 /* 872 * The filesystem is now frozen far enough that memory reclaim 873 * cannot safely operate on the filesystem. Hence we need to 874 * set a GFP_NOFS context here to avoid recursion deadlocks. 875 */ 876 flags = memalloc_nofs_save(); 877 xfs_save_resvblks(mp); 878 ret = xfs_log_quiesce(mp); 879 memalloc_nofs_restore(flags); 880 881 /* 882 * For read-write filesystems, we need to restart the inodegc on error 883 * because we stopped it at SB_FREEZE_PAGEFAULT level and a thaw is not 884 * going to be run to restart it now. We are at SB_FREEZE_FS level 885 * here, so we can restart safely without racing with a stop in 886 * xfs_fs_sync_fs(). 887 */ 888 if (ret && !xfs_is_readonly(mp)) { 889 xfs_blockgc_start(mp); 890 xfs_inodegc_start(mp); 891 } 892 893 return ret; 894 } 895 896 STATIC int 897 xfs_fs_unfreeze( 898 struct super_block *sb) 899 { 900 struct xfs_mount *mp = XFS_M(sb); 901 902 xfs_restore_resvblks(mp); 903 xfs_log_work_queue(mp); 904 905 /* 906 * Don't reactivate the inodegc worker on a readonly filesystem because 907 * inodes are sent directly to reclaim. Don't reactivate the blockgc 908 * worker because there are no speculative preallocations on a readonly 909 * filesystem. 910 */ 911 if (!xfs_is_readonly(mp)) { 912 xfs_blockgc_start(mp); 913 xfs_inodegc_start(mp); 914 } 915 916 return 0; 917 } 918 919 /* 920 * This function fills in xfs_mount_t fields based on mount args. 921 * Note: the superblock _has_ now been read in. 922 */ 923 STATIC int 924 xfs_finish_flags( 925 struct xfs_mount *mp) 926 { 927 /* Fail a mount where the logbuf is smaller than the log stripe */ 928 if (xfs_has_logv2(mp)) { 929 if (mp->m_logbsize <= 0 && 930 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 931 mp->m_logbsize = mp->m_sb.sb_logsunit; 932 } else if (mp->m_logbsize > 0 && 933 mp->m_logbsize < mp->m_sb.sb_logsunit) { 934 xfs_warn(mp, 935 "logbuf size must be greater than or equal to log stripe size"); 936 return -EINVAL; 937 } 938 } else { 939 /* Fail a mount if the logbuf is larger than 32K */ 940 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 941 xfs_warn(mp, 942 "logbuf size for version 1 logs must be 16K or 32K"); 943 return -EINVAL; 944 } 945 } 946 947 /* 948 * V5 filesystems always use attr2 format for attributes. 949 */ 950 if (xfs_has_crc(mp) && xfs_has_noattr2(mp)) { 951 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. " 952 "attr2 is always enabled for V5 filesystems."); 953 return -EINVAL; 954 } 955 956 /* 957 * prohibit r/w mounts of read-only filesystems 958 */ 959 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !xfs_is_readonly(mp)) { 960 xfs_warn(mp, 961 "cannot mount a read-only filesystem as read-write"); 962 return -EROFS; 963 } 964 965 if ((mp->m_qflags & XFS_GQUOTA_ACCT) && 966 (mp->m_qflags & XFS_PQUOTA_ACCT) && 967 !xfs_has_pquotino(mp)) { 968 xfs_warn(mp, 969 "Super block does not support project and group quota together"); 970 return -EINVAL; 971 } 972 973 return 0; 974 } 975 976 static int 977 xfs_init_percpu_counters( 978 struct xfs_mount *mp) 979 { 980 int error; 981 982 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); 983 if (error) 984 return -ENOMEM; 985 986 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL); 987 if (error) 988 goto free_icount; 989 990 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL); 991 if (error) 992 goto free_ifree; 993 994 error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL); 995 if (error) 996 goto free_fdblocks; 997 998 return 0; 999 1000 free_fdblocks: 1001 percpu_counter_destroy(&mp->m_fdblocks); 1002 free_ifree: 1003 percpu_counter_destroy(&mp->m_ifree); 1004 free_icount: 1005 percpu_counter_destroy(&mp->m_icount); 1006 return -ENOMEM; 1007 } 1008 1009 void 1010 xfs_reinit_percpu_counters( 1011 struct xfs_mount *mp) 1012 { 1013 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount); 1014 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree); 1015 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks); 1016 } 1017 1018 static void 1019 xfs_destroy_percpu_counters( 1020 struct xfs_mount *mp) 1021 { 1022 percpu_counter_destroy(&mp->m_icount); 1023 percpu_counter_destroy(&mp->m_ifree); 1024 percpu_counter_destroy(&mp->m_fdblocks); 1025 ASSERT(xfs_is_shutdown(mp) || 1026 percpu_counter_sum(&mp->m_delalloc_blks) == 0); 1027 percpu_counter_destroy(&mp->m_delalloc_blks); 1028 } 1029 1030 static int 1031 xfs_inodegc_init_percpu( 1032 struct xfs_mount *mp) 1033 { 1034 struct xfs_inodegc *gc; 1035 int cpu; 1036 1037 mp->m_inodegc = alloc_percpu(struct xfs_inodegc); 1038 if (!mp->m_inodegc) 1039 return -ENOMEM; 1040 1041 for_each_possible_cpu(cpu) { 1042 gc = per_cpu_ptr(mp->m_inodegc, cpu); 1043 init_llist_head(&gc->list); 1044 gc->items = 0; 1045 INIT_WORK(&gc->work, xfs_inodegc_worker); 1046 } 1047 return 0; 1048 } 1049 1050 static void 1051 xfs_inodegc_free_percpu( 1052 struct xfs_mount *mp) 1053 { 1054 if (!mp->m_inodegc) 1055 return; 1056 free_percpu(mp->m_inodegc); 1057 } 1058 1059 static void 1060 xfs_fs_put_super( 1061 struct super_block *sb) 1062 { 1063 struct xfs_mount *mp = XFS_M(sb); 1064 1065 /* if ->fill_super failed, we have no mount to tear down */ 1066 if (!sb->s_fs_info) 1067 return; 1068 1069 xfs_notice(mp, "Unmounting Filesystem"); 1070 xfs_filestream_unmount(mp); 1071 xfs_unmountfs(mp); 1072 1073 xfs_freesb(mp); 1074 free_percpu(mp->m_stats.xs_stats); 1075 xfs_mount_list_del(mp); 1076 xfs_inodegc_free_percpu(mp); 1077 xfs_destroy_percpu_counters(mp); 1078 xfs_destroy_mount_workqueues(mp); 1079 xfs_close_devices(mp); 1080 1081 sb->s_fs_info = NULL; 1082 xfs_mount_free(mp); 1083 } 1084 1085 static long 1086 xfs_fs_nr_cached_objects( 1087 struct super_block *sb, 1088 struct shrink_control *sc) 1089 { 1090 /* Paranoia: catch incorrect calls during mount setup or teardown */ 1091 if (WARN_ON_ONCE(!sb->s_fs_info)) 1092 return 0; 1093 return xfs_reclaim_inodes_count(XFS_M(sb)); 1094 } 1095 1096 static long 1097 xfs_fs_free_cached_objects( 1098 struct super_block *sb, 1099 struct shrink_control *sc) 1100 { 1101 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); 1102 } 1103 1104 static const struct super_operations xfs_super_operations = { 1105 .alloc_inode = xfs_fs_alloc_inode, 1106 .destroy_inode = xfs_fs_destroy_inode, 1107 .dirty_inode = xfs_fs_dirty_inode, 1108 .drop_inode = xfs_fs_drop_inode, 1109 .put_super = xfs_fs_put_super, 1110 .sync_fs = xfs_fs_sync_fs, 1111 .freeze_fs = xfs_fs_freeze, 1112 .unfreeze_fs = xfs_fs_unfreeze, 1113 .statfs = xfs_fs_statfs, 1114 .show_options = xfs_fs_show_options, 1115 .nr_cached_objects = xfs_fs_nr_cached_objects, 1116 .free_cached_objects = xfs_fs_free_cached_objects, 1117 }; 1118 1119 static int 1120 suffix_kstrtoint( 1121 const char *s, 1122 unsigned int base, 1123 int *res) 1124 { 1125 int last, shift_left_factor = 0, _res; 1126 char *value; 1127 int ret = 0; 1128 1129 value = kstrdup(s, GFP_KERNEL); 1130 if (!value) 1131 return -ENOMEM; 1132 1133 last = strlen(value) - 1; 1134 if (value[last] == 'K' || value[last] == 'k') { 1135 shift_left_factor = 10; 1136 value[last] = '\0'; 1137 } 1138 if (value[last] == 'M' || value[last] == 'm') { 1139 shift_left_factor = 20; 1140 value[last] = '\0'; 1141 } 1142 if (value[last] == 'G' || value[last] == 'g') { 1143 shift_left_factor = 30; 1144 value[last] = '\0'; 1145 } 1146 1147 if (kstrtoint(value, base, &_res)) 1148 ret = -EINVAL; 1149 kfree(value); 1150 *res = _res << shift_left_factor; 1151 return ret; 1152 } 1153 1154 static inline void 1155 xfs_fs_warn_deprecated( 1156 struct fs_context *fc, 1157 struct fs_parameter *param, 1158 uint64_t flag, 1159 bool value) 1160 { 1161 /* Don't print the warning if reconfiguring and current mount point 1162 * already had the flag set 1163 */ 1164 if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) && 1165 !!(XFS_M(fc->root->d_sb)->m_features & flag) == value) 1166 return; 1167 xfs_warn(fc->s_fs_info, "%s mount option is deprecated.", param->key); 1168 } 1169 1170 /* 1171 * Set mount state from a mount option. 1172 * 1173 * NOTE: mp->m_super is NULL here! 1174 */ 1175 static int 1176 xfs_fs_parse_param( 1177 struct fs_context *fc, 1178 struct fs_parameter *param) 1179 { 1180 struct xfs_mount *parsing_mp = fc->s_fs_info; 1181 struct fs_parse_result result; 1182 int size = 0; 1183 int opt; 1184 1185 opt = fs_parse(fc, xfs_fs_parameters, param, &result); 1186 if (opt < 0) 1187 return opt; 1188 1189 switch (opt) { 1190 case Opt_logbufs: 1191 parsing_mp->m_logbufs = result.uint_32; 1192 return 0; 1193 case Opt_logbsize: 1194 if (suffix_kstrtoint(param->string, 10, &parsing_mp->m_logbsize)) 1195 return -EINVAL; 1196 return 0; 1197 case Opt_logdev: 1198 kfree(parsing_mp->m_logname); 1199 parsing_mp->m_logname = kstrdup(param->string, GFP_KERNEL); 1200 if (!parsing_mp->m_logname) 1201 return -ENOMEM; 1202 return 0; 1203 case Opt_rtdev: 1204 kfree(parsing_mp->m_rtname); 1205 parsing_mp->m_rtname = kstrdup(param->string, GFP_KERNEL); 1206 if (!parsing_mp->m_rtname) 1207 return -ENOMEM; 1208 return 0; 1209 case Opt_allocsize: 1210 if (suffix_kstrtoint(param->string, 10, &size)) 1211 return -EINVAL; 1212 parsing_mp->m_allocsize_log = ffs(size) - 1; 1213 parsing_mp->m_features |= XFS_FEAT_ALLOCSIZE; 1214 return 0; 1215 case Opt_grpid: 1216 case Opt_bsdgroups: 1217 parsing_mp->m_features |= XFS_FEAT_GRPID; 1218 return 0; 1219 case Opt_nogrpid: 1220 case Opt_sysvgroups: 1221 parsing_mp->m_features &= ~XFS_FEAT_GRPID; 1222 return 0; 1223 case Opt_wsync: 1224 parsing_mp->m_features |= XFS_FEAT_WSYNC; 1225 return 0; 1226 case Opt_norecovery: 1227 parsing_mp->m_features |= XFS_FEAT_NORECOVERY; 1228 return 0; 1229 case Opt_noalign: 1230 parsing_mp->m_features |= XFS_FEAT_NOALIGN; 1231 return 0; 1232 case Opt_swalloc: 1233 parsing_mp->m_features |= XFS_FEAT_SWALLOC; 1234 return 0; 1235 case Opt_sunit: 1236 parsing_mp->m_dalign = result.uint_32; 1237 return 0; 1238 case Opt_swidth: 1239 parsing_mp->m_swidth = result.uint_32; 1240 return 0; 1241 case Opt_inode32: 1242 parsing_mp->m_features |= XFS_FEAT_SMALL_INUMS; 1243 return 0; 1244 case Opt_inode64: 1245 parsing_mp->m_features &= ~XFS_FEAT_SMALL_INUMS; 1246 return 0; 1247 case Opt_nouuid: 1248 parsing_mp->m_features |= XFS_FEAT_NOUUID; 1249 return 0; 1250 case Opt_largeio: 1251 parsing_mp->m_features |= XFS_FEAT_LARGE_IOSIZE; 1252 return 0; 1253 case Opt_nolargeio: 1254 parsing_mp->m_features &= ~XFS_FEAT_LARGE_IOSIZE; 1255 return 0; 1256 case Opt_filestreams: 1257 parsing_mp->m_features |= XFS_FEAT_FILESTREAMS; 1258 return 0; 1259 case Opt_noquota: 1260 parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 1261 parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 1262 return 0; 1263 case Opt_quota: 1264 case Opt_uquota: 1265 case Opt_usrquota: 1266 parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ENFD); 1267 return 0; 1268 case Opt_qnoenforce: 1269 case Opt_uqnoenforce: 1270 parsing_mp->m_qflags |= XFS_UQUOTA_ACCT; 1271 parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD; 1272 return 0; 1273 case Opt_pquota: 1274 case Opt_prjquota: 1275 parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ENFD); 1276 return 0; 1277 case Opt_pqnoenforce: 1278 parsing_mp->m_qflags |= XFS_PQUOTA_ACCT; 1279 parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD; 1280 return 0; 1281 case Opt_gquota: 1282 case Opt_grpquota: 1283 parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ENFD); 1284 return 0; 1285 case Opt_gqnoenforce: 1286 parsing_mp->m_qflags |= XFS_GQUOTA_ACCT; 1287 parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD; 1288 return 0; 1289 case Opt_discard: 1290 parsing_mp->m_features |= XFS_FEAT_DISCARD; 1291 return 0; 1292 case Opt_nodiscard: 1293 parsing_mp->m_features &= ~XFS_FEAT_DISCARD; 1294 return 0; 1295 #ifdef CONFIG_FS_DAX 1296 case Opt_dax: 1297 xfs_mount_set_dax_mode(parsing_mp, XFS_DAX_ALWAYS); 1298 return 0; 1299 case Opt_dax_enum: 1300 xfs_mount_set_dax_mode(parsing_mp, result.uint_32); 1301 return 0; 1302 #endif 1303 /* Following mount options will be removed in September 2025 */ 1304 case Opt_ikeep: 1305 xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, true); 1306 parsing_mp->m_features |= XFS_FEAT_IKEEP; 1307 return 0; 1308 case Opt_noikeep: 1309 xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, false); 1310 parsing_mp->m_features &= ~XFS_FEAT_IKEEP; 1311 return 0; 1312 case Opt_attr2: 1313 xfs_fs_warn_deprecated(fc, param, XFS_FEAT_ATTR2, true); 1314 parsing_mp->m_features |= XFS_FEAT_ATTR2; 1315 return 0; 1316 case Opt_noattr2: 1317 xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, true); 1318 parsing_mp->m_features |= XFS_FEAT_NOATTR2; 1319 return 0; 1320 default: 1321 xfs_warn(parsing_mp, "unknown mount option [%s].", param->key); 1322 return -EINVAL; 1323 } 1324 1325 return 0; 1326 } 1327 1328 static int 1329 xfs_fs_validate_params( 1330 struct xfs_mount *mp) 1331 { 1332 /* No recovery flag requires a read-only mount */ 1333 if (xfs_has_norecovery(mp) && !xfs_is_readonly(mp)) { 1334 xfs_warn(mp, "no-recovery mounts must be read-only."); 1335 return -EINVAL; 1336 } 1337 1338 /* 1339 * We have not read the superblock at this point, so only the attr2 1340 * mount option can set the attr2 feature by this stage. 1341 */ 1342 if (xfs_has_attr2(mp) && xfs_has_noattr2(mp)) { 1343 xfs_warn(mp, "attr2 and noattr2 cannot both be specified."); 1344 return -EINVAL; 1345 } 1346 1347 1348 if (xfs_has_noalign(mp) && (mp->m_dalign || mp->m_swidth)) { 1349 xfs_warn(mp, 1350 "sunit and swidth options incompatible with the noalign option"); 1351 return -EINVAL; 1352 } 1353 1354 if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) { 1355 xfs_warn(mp, "quota support not available in this kernel."); 1356 return -EINVAL; 1357 } 1358 1359 if ((mp->m_dalign && !mp->m_swidth) || 1360 (!mp->m_dalign && mp->m_swidth)) { 1361 xfs_warn(mp, "sunit and swidth must be specified together"); 1362 return -EINVAL; 1363 } 1364 1365 if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) { 1366 xfs_warn(mp, 1367 "stripe width (%d) must be a multiple of the stripe unit (%d)", 1368 mp->m_swidth, mp->m_dalign); 1369 return -EINVAL; 1370 } 1371 1372 if (mp->m_logbufs != -1 && 1373 mp->m_logbufs != 0 && 1374 (mp->m_logbufs < XLOG_MIN_ICLOGS || 1375 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 1376 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 1377 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 1378 return -EINVAL; 1379 } 1380 1381 if (mp->m_logbsize != -1 && 1382 mp->m_logbsize != 0 && 1383 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 1384 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 1385 !is_power_of_2(mp->m_logbsize))) { 1386 xfs_warn(mp, 1387 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 1388 mp->m_logbsize); 1389 return -EINVAL; 1390 } 1391 1392 if (xfs_has_allocsize(mp) && 1393 (mp->m_allocsize_log > XFS_MAX_IO_LOG || 1394 mp->m_allocsize_log < XFS_MIN_IO_LOG)) { 1395 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 1396 mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG); 1397 return -EINVAL; 1398 } 1399 1400 return 0; 1401 } 1402 1403 static int 1404 xfs_fs_fill_super( 1405 struct super_block *sb, 1406 struct fs_context *fc) 1407 { 1408 struct xfs_mount *mp = sb->s_fs_info; 1409 struct inode *root; 1410 int flags = 0, error; 1411 1412 mp->m_super = sb; 1413 1414 error = xfs_fs_validate_params(mp); 1415 if (error) 1416 goto out_free_names; 1417 1418 sb_min_blocksize(sb, BBSIZE); 1419 sb->s_xattr = xfs_xattr_handlers; 1420 sb->s_export_op = &xfs_export_operations; 1421 #ifdef CONFIG_XFS_QUOTA 1422 sb->s_qcop = &xfs_quotactl_operations; 1423 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 1424 #endif 1425 sb->s_op = &xfs_super_operations; 1426 1427 /* 1428 * Delay mount work if the debug hook is set. This is debug 1429 * instrumention to coordinate simulation of xfs mount failures with 1430 * VFS superblock operations 1431 */ 1432 if (xfs_globals.mount_delay) { 1433 xfs_notice(mp, "Delaying mount for %d seconds.", 1434 xfs_globals.mount_delay); 1435 msleep(xfs_globals.mount_delay * 1000); 1436 } 1437 1438 if (fc->sb_flags & SB_SILENT) 1439 flags |= XFS_MFSI_QUIET; 1440 1441 error = xfs_open_devices(mp); 1442 if (error) 1443 goto out_free_names; 1444 1445 error = xfs_init_mount_workqueues(mp); 1446 if (error) 1447 goto out_close_devices; 1448 1449 error = xfs_init_percpu_counters(mp); 1450 if (error) 1451 goto out_destroy_workqueues; 1452 1453 error = xfs_inodegc_init_percpu(mp); 1454 if (error) 1455 goto out_destroy_counters; 1456 1457 /* 1458 * All percpu data structures requiring cleanup when a cpu goes offline 1459 * must be allocated before adding this @mp to the cpu-dead handler's 1460 * mount list. 1461 */ 1462 xfs_mount_list_add(mp); 1463 1464 /* Allocate stats memory before we do operations that might use it */ 1465 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats); 1466 if (!mp->m_stats.xs_stats) { 1467 error = -ENOMEM; 1468 goto out_destroy_inodegc; 1469 } 1470 1471 error = xfs_readsb(mp, flags); 1472 if (error) 1473 goto out_free_stats; 1474 1475 error = xfs_finish_flags(mp); 1476 if (error) 1477 goto out_free_sb; 1478 1479 error = xfs_setup_devices(mp); 1480 if (error) 1481 goto out_free_sb; 1482 1483 /* V4 support is undergoing deprecation. */ 1484 if (!xfs_has_crc(mp)) { 1485 #ifdef CONFIG_XFS_SUPPORT_V4 1486 xfs_warn_once(mp, 1487 "Deprecated V4 format (crc=0) will not be supported after September 2030."); 1488 #else 1489 xfs_warn(mp, 1490 "Deprecated V4 format (crc=0) not supported by kernel."); 1491 error = -EINVAL; 1492 goto out_free_sb; 1493 #endif 1494 } 1495 1496 /* Filesystem claims it needs repair, so refuse the mount. */ 1497 if (xfs_has_needsrepair(mp)) { 1498 xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair."); 1499 error = -EFSCORRUPTED; 1500 goto out_free_sb; 1501 } 1502 1503 /* 1504 * Don't touch the filesystem if a user tool thinks it owns the primary 1505 * superblock. mkfs doesn't clear the flag from secondary supers, so 1506 * we don't check them at all. 1507 */ 1508 if (mp->m_sb.sb_inprogress) { 1509 xfs_warn(mp, "Offline file system operation in progress!"); 1510 error = -EFSCORRUPTED; 1511 goto out_free_sb; 1512 } 1513 1514 /* 1515 * Until this is fixed only page-sized or smaller data blocks work. 1516 */ 1517 if (mp->m_sb.sb_blocksize > PAGE_SIZE) { 1518 xfs_warn(mp, 1519 "File system with blocksize %d bytes. " 1520 "Only pagesize (%ld) or less will currently work.", 1521 mp->m_sb.sb_blocksize, PAGE_SIZE); 1522 error = -ENOSYS; 1523 goto out_free_sb; 1524 } 1525 1526 /* Ensure this filesystem fits in the page cache limits */ 1527 if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) || 1528 xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) { 1529 xfs_warn(mp, 1530 "file system too large to be mounted on this system."); 1531 error = -EFBIG; 1532 goto out_free_sb; 1533 } 1534 1535 /* 1536 * XFS block mappings use 54 bits to store the logical block offset. 1537 * This should suffice to handle the maximum file size that the VFS 1538 * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT 1539 * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes 1540 * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON 1541 * to check this assertion. 1542 * 1543 * Avoid integer overflow by comparing the maximum bmbt offset to the 1544 * maximum pagecache offset in units of fs blocks. 1545 */ 1546 if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) { 1547 xfs_warn(mp, 1548 "MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!", 1549 XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE), 1550 XFS_MAX_FILEOFF); 1551 error = -EINVAL; 1552 goto out_free_sb; 1553 } 1554 1555 error = xfs_filestream_mount(mp); 1556 if (error) 1557 goto out_free_sb; 1558 1559 /* 1560 * we must configure the block size in the superblock before we run the 1561 * full mount process as the mount process can lookup and cache inodes. 1562 */ 1563 sb->s_magic = XFS_SUPER_MAGIC; 1564 sb->s_blocksize = mp->m_sb.sb_blocksize; 1565 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1566 sb->s_maxbytes = MAX_LFS_FILESIZE; 1567 sb->s_max_links = XFS_MAXLINK; 1568 sb->s_time_gran = 1; 1569 if (xfs_has_bigtime(mp)) { 1570 sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN); 1571 sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX); 1572 } else { 1573 sb->s_time_min = XFS_LEGACY_TIME_MIN; 1574 sb->s_time_max = XFS_LEGACY_TIME_MAX; 1575 } 1576 trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max); 1577 sb->s_iflags |= SB_I_CGROUPWB; 1578 1579 set_posix_acl_flag(sb); 1580 1581 /* version 5 superblocks support inode version counters. */ 1582 if (xfs_has_crc(mp)) 1583 sb->s_flags |= SB_I_VERSION; 1584 1585 if (xfs_has_dax_always(mp)) { 1586 bool rtdev_is_dax = false, datadev_is_dax; 1587 1588 xfs_warn(mp, 1589 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1590 1591 datadev_is_dax = bdev_dax_supported(mp->m_ddev_targp->bt_bdev, 1592 sb->s_blocksize); 1593 if (mp->m_rtdev_targp) 1594 rtdev_is_dax = bdev_dax_supported( 1595 mp->m_rtdev_targp->bt_bdev, sb->s_blocksize); 1596 if (!rtdev_is_dax && !datadev_is_dax) { 1597 xfs_alert(mp, 1598 "DAX unsupported by block device. Turning off DAX."); 1599 xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER); 1600 } 1601 if (xfs_has_reflink(mp)) { 1602 xfs_alert(mp, 1603 "DAX and reflink cannot be used together!"); 1604 error = -EINVAL; 1605 goto out_filestream_unmount; 1606 } 1607 } 1608 1609 if (xfs_has_discard(mp)) { 1610 struct request_queue *q = bdev_get_queue(sb->s_bdev); 1611 1612 if (!blk_queue_discard(q)) { 1613 xfs_warn(mp, "mounting with \"discard\" option, but " 1614 "the device does not support discard"); 1615 mp->m_features &= ~XFS_FEAT_DISCARD; 1616 } 1617 } 1618 1619 if (xfs_has_reflink(mp)) { 1620 if (mp->m_sb.sb_rblocks) { 1621 xfs_alert(mp, 1622 "reflink not compatible with realtime device!"); 1623 error = -EINVAL; 1624 goto out_filestream_unmount; 1625 } 1626 1627 if (xfs_globals.always_cow) { 1628 xfs_info(mp, "using DEBUG-only always_cow mode."); 1629 mp->m_always_cow = true; 1630 } 1631 } 1632 1633 if (xfs_has_rmapbt(mp) && mp->m_sb.sb_rblocks) { 1634 xfs_alert(mp, 1635 "reverse mapping btree not compatible with realtime device!"); 1636 error = -EINVAL; 1637 goto out_filestream_unmount; 1638 } 1639 1640 error = xfs_mountfs(mp); 1641 if (error) 1642 goto out_filestream_unmount; 1643 1644 root = igrab(VFS_I(mp->m_rootip)); 1645 if (!root) { 1646 error = -ENOENT; 1647 goto out_unmount; 1648 } 1649 sb->s_root = d_make_root(root); 1650 if (!sb->s_root) { 1651 error = -ENOMEM; 1652 goto out_unmount; 1653 } 1654 1655 return 0; 1656 1657 out_filestream_unmount: 1658 xfs_filestream_unmount(mp); 1659 out_free_sb: 1660 xfs_freesb(mp); 1661 out_free_stats: 1662 free_percpu(mp->m_stats.xs_stats); 1663 out_destroy_inodegc: 1664 xfs_mount_list_del(mp); 1665 xfs_inodegc_free_percpu(mp); 1666 out_destroy_counters: 1667 xfs_destroy_percpu_counters(mp); 1668 out_destroy_workqueues: 1669 xfs_destroy_mount_workqueues(mp); 1670 out_close_devices: 1671 xfs_close_devices(mp); 1672 out_free_names: 1673 sb->s_fs_info = NULL; 1674 xfs_mount_free(mp); 1675 return error; 1676 1677 out_unmount: 1678 xfs_filestream_unmount(mp); 1679 xfs_unmountfs(mp); 1680 goto out_free_sb; 1681 } 1682 1683 static int 1684 xfs_fs_get_tree( 1685 struct fs_context *fc) 1686 { 1687 return get_tree_bdev(fc, xfs_fs_fill_super); 1688 } 1689 1690 static int 1691 xfs_remount_rw( 1692 struct xfs_mount *mp) 1693 { 1694 struct xfs_sb *sbp = &mp->m_sb; 1695 int error; 1696 1697 if (xfs_has_norecovery(mp)) { 1698 xfs_warn(mp, 1699 "ro->rw transition prohibited on norecovery mount"); 1700 return -EINVAL; 1701 } 1702 1703 if (xfs_sb_is_v5(sbp) && 1704 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 1705 xfs_warn(mp, 1706 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem", 1707 (sbp->sb_features_ro_compat & 1708 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 1709 return -EINVAL; 1710 } 1711 1712 clear_bit(XFS_OPSTATE_READONLY, &mp->m_opstate); 1713 1714 /* 1715 * If this is the first remount to writeable state we might have some 1716 * superblock changes to update. 1717 */ 1718 if (mp->m_update_sb) { 1719 error = xfs_sync_sb(mp, false); 1720 if (error) { 1721 xfs_warn(mp, "failed to write sb changes"); 1722 return error; 1723 } 1724 mp->m_update_sb = false; 1725 } 1726 1727 /* 1728 * Fill out the reserve pool if it is empty. Use the stashed value if 1729 * it is non-zero, otherwise go with the default. 1730 */ 1731 xfs_restore_resvblks(mp); 1732 xfs_log_work_queue(mp); 1733 1734 /* Recover any CoW blocks that never got remapped. */ 1735 error = xfs_reflink_recover_cow(mp); 1736 if (error) { 1737 xfs_err(mp, 1738 "Error %d recovering leftover CoW allocations.", error); 1739 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 1740 return error; 1741 } 1742 xfs_blockgc_start(mp); 1743 1744 /* Create the per-AG metadata reservation pool .*/ 1745 error = xfs_fs_reserve_ag_blocks(mp); 1746 if (error && error != -ENOSPC) 1747 return error; 1748 1749 /* Re-enable the background inode inactivation worker. */ 1750 xfs_inodegc_start(mp); 1751 1752 return 0; 1753 } 1754 1755 static int 1756 xfs_remount_ro( 1757 struct xfs_mount *mp) 1758 { 1759 int error; 1760 1761 /* 1762 * Cancel background eofb scanning so it cannot race with the final 1763 * log force+buftarg wait and deadlock the remount. 1764 */ 1765 xfs_blockgc_stop(mp); 1766 1767 /* Get rid of any leftover CoW reservations... */ 1768 error = xfs_blockgc_free_space(mp, NULL); 1769 if (error) { 1770 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 1771 return error; 1772 } 1773 1774 /* 1775 * Stop the inodegc background worker. xfs_fs_reconfigure already 1776 * flushed all pending inodegc work when it sync'd the filesystem. 1777 * The VFS holds s_umount, so we know that inodes cannot enter 1778 * xfs_fs_destroy_inode during a remount operation. In readonly mode 1779 * we send inodes straight to reclaim, so no inodes will be queued. 1780 */ 1781 xfs_inodegc_stop(mp); 1782 1783 /* Free the per-AG metadata reservation pool. */ 1784 error = xfs_fs_unreserve_ag_blocks(mp); 1785 if (error) { 1786 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 1787 return error; 1788 } 1789 1790 /* 1791 * Before we sync the metadata, we need to free up the reserve block 1792 * pool so that the used block count in the superblock on disk is 1793 * correct at the end of the remount. Stash the current* reserve pool 1794 * size so that if we get remounted rw, we can return it to the same 1795 * size. 1796 */ 1797 xfs_save_resvblks(mp); 1798 1799 xfs_log_clean(mp); 1800 set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate); 1801 1802 return 0; 1803 } 1804 1805 /* 1806 * Logically we would return an error here to prevent users from believing 1807 * they might have changed mount options using remount which can't be changed. 1808 * 1809 * But unfortunately mount(8) adds all options from mtab and fstab to the mount 1810 * arguments in some cases so we can't blindly reject options, but have to 1811 * check for each specified option if it actually differs from the currently 1812 * set option and only reject it if that's the case. 1813 * 1814 * Until that is implemented we return success for every remount request, and 1815 * silently ignore all options that we can't actually change. 1816 */ 1817 static int 1818 xfs_fs_reconfigure( 1819 struct fs_context *fc) 1820 { 1821 struct xfs_mount *mp = XFS_M(fc->root->d_sb); 1822 struct xfs_mount *new_mp = fc->s_fs_info; 1823 int flags = fc->sb_flags; 1824 int error; 1825 1826 /* version 5 superblocks always support version counters. */ 1827 if (xfs_has_crc(mp)) 1828 fc->sb_flags |= SB_I_VERSION; 1829 1830 error = xfs_fs_validate_params(new_mp); 1831 if (error) 1832 return error; 1833 1834 sync_filesystem(mp->m_super); 1835 1836 /* inode32 -> inode64 */ 1837 if (xfs_has_small_inums(mp) && !xfs_has_small_inums(new_mp)) { 1838 mp->m_features &= ~XFS_FEAT_SMALL_INUMS; 1839 mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount); 1840 } 1841 1842 /* inode64 -> inode32 */ 1843 if (!xfs_has_small_inums(mp) && xfs_has_small_inums(new_mp)) { 1844 mp->m_features |= XFS_FEAT_SMALL_INUMS; 1845 mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount); 1846 } 1847 1848 /* ro -> rw */ 1849 if (xfs_is_readonly(mp) && !(flags & SB_RDONLY)) { 1850 error = xfs_remount_rw(mp); 1851 if (error) 1852 return error; 1853 } 1854 1855 /* rw -> ro */ 1856 if (!xfs_is_readonly(mp) && (flags & SB_RDONLY)) { 1857 error = xfs_remount_ro(mp); 1858 if (error) 1859 return error; 1860 } 1861 1862 return 0; 1863 } 1864 1865 static void xfs_fs_free( 1866 struct fs_context *fc) 1867 { 1868 struct xfs_mount *mp = fc->s_fs_info; 1869 1870 /* 1871 * mp is stored in the fs_context when it is initialized. 1872 * mp is transferred to the superblock on a successful mount, 1873 * but if an error occurs before the transfer we have to free 1874 * it here. 1875 */ 1876 if (mp) 1877 xfs_mount_free(mp); 1878 } 1879 1880 static const struct fs_context_operations xfs_context_ops = { 1881 .parse_param = xfs_fs_parse_param, 1882 .get_tree = xfs_fs_get_tree, 1883 .reconfigure = xfs_fs_reconfigure, 1884 .free = xfs_fs_free, 1885 }; 1886 1887 static int xfs_init_fs_context( 1888 struct fs_context *fc) 1889 { 1890 struct xfs_mount *mp; 1891 1892 mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO); 1893 if (!mp) 1894 return -ENOMEM; 1895 1896 spin_lock_init(&mp->m_sb_lock); 1897 spin_lock_init(&mp->m_agirotor_lock); 1898 INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); 1899 spin_lock_init(&mp->m_perag_lock); 1900 mutex_init(&mp->m_growlock); 1901 INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker); 1902 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1903 mp->m_kobj.kobject.kset = xfs_kset; 1904 /* 1905 * We don't create the finobt per-ag space reservation until after log 1906 * recovery, so we must set this to true so that an ifree transaction 1907 * started during log recovery will not depend on space reservations 1908 * for finobt expansion. 1909 */ 1910 mp->m_finobt_nores = true; 1911 1912 /* 1913 * These can be overridden by the mount option parsing. 1914 */ 1915 mp->m_logbufs = -1; 1916 mp->m_logbsize = -1; 1917 mp->m_allocsize_log = 16; /* 64k */ 1918 1919 /* 1920 * Copy binary VFS mount flags we are interested in. 1921 */ 1922 if (fc->sb_flags & SB_RDONLY) 1923 set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate); 1924 if (fc->sb_flags & SB_DIRSYNC) 1925 mp->m_features |= XFS_FEAT_DIRSYNC; 1926 if (fc->sb_flags & SB_SYNCHRONOUS) 1927 mp->m_features |= XFS_FEAT_WSYNC; 1928 1929 fc->s_fs_info = mp; 1930 fc->ops = &xfs_context_ops; 1931 1932 return 0; 1933 } 1934 1935 static struct file_system_type xfs_fs_type = { 1936 .owner = THIS_MODULE, 1937 .name = "xfs", 1938 .init_fs_context = xfs_init_fs_context, 1939 .parameters = xfs_fs_parameters, 1940 .kill_sb = kill_block_super, 1941 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 1942 }; 1943 MODULE_ALIAS_FS("xfs"); 1944 1945 STATIC int __init 1946 xfs_init_zones(void) 1947 { 1948 xfs_log_ticket_zone = kmem_cache_create("xfs_log_ticket", 1949 sizeof(struct xlog_ticket), 1950 0, 0, NULL); 1951 if (!xfs_log_ticket_zone) 1952 goto out; 1953 1954 xfs_bmap_free_item_zone = kmem_cache_create("xfs_bmap_free_item", 1955 sizeof(struct xfs_extent_free_item), 1956 0, 0, NULL); 1957 if (!xfs_bmap_free_item_zone) 1958 goto out_destroy_log_ticket_zone; 1959 1960 xfs_btree_cur_zone = kmem_cache_create("xfs_btree_cur", 1961 sizeof(struct xfs_btree_cur), 1962 0, 0, NULL); 1963 if (!xfs_btree_cur_zone) 1964 goto out_destroy_bmap_free_item_zone; 1965 1966 xfs_da_state_zone = kmem_cache_create("xfs_da_state", 1967 sizeof(struct xfs_da_state), 1968 0, 0, NULL); 1969 if (!xfs_da_state_zone) 1970 goto out_destroy_btree_cur_zone; 1971 1972 xfs_ifork_zone = kmem_cache_create("xfs_ifork", 1973 sizeof(struct xfs_ifork), 1974 0, 0, NULL); 1975 if (!xfs_ifork_zone) 1976 goto out_destroy_da_state_zone; 1977 1978 xfs_trans_zone = kmem_cache_create("xfs_trans", 1979 sizeof(struct xfs_trans), 1980 0, 0, NULL); 1981 if (!xfs_trans_zone) 1982 goto out_destroy_ifork_zone; 1983 1984 1985 /* 1986 * The size of the zone allocated buf log item is the maximum 1987 * size possible under XFS. This wastes a little bit of memory, 1988 * but it is much faster. 1989 */ 1990 xfs_buf_item_zone = kmem_cache_create("xfs_buf_item", 1991 sizeof(struct xfs_buf_log_item), 1992 0, 0, NULL); 1993 if (!xfs_buf_item_zone) 1994 goto out_destroy_trans_zone; 1995 1996 xfs_efd_zone = kmem_cache_create("xfs_efd_item", 1997 (sizeof(struct xfs_efd_log_item) + 1998 (XFS_EFD_MAX_FAST_EXTENTS - 1) * 1999 sizeof(struct xfs_extent)), 2000 0, 0, NULL); 2001 if (!xfs_efd_zone) 2002 goto out_destroy_buf_item_zone; 2003 2004 xfs_efi_zone = kmem_cache_create("xfs_efi_item", 2005 (sizeof(struct xfs_efi_log_item) + 2006 (XFS_EFI_MAX_FAST_EXTENTS - 1) * 2007 sizeof(struct xfs_extent)), 2008 0, 0, NULL); 2009 if (!xfs_efi_zone) 2010 goto out_destroy_efd_zone; 2011 2012 xfs_inode_zone = kmem_cache_create("xfs_inode", 2013 sizeof(struct xfs_inode), 0, 2014 (SLAB_HWCACHE_ALIGN | 2015 SLAB_RECLAIM_ACCOUNT | 2016 SLAB_MEM_SPREAD | SLAB_ACCOUNT), 2017 xfs_fs_inode_init_once); 2018 if (!xfs_inode_zone) 2019 goto out_destroy_efi_zone; 2020 2021 xfs_ili_zone = kmem_cache_create("xfs_ili", 2022 sizeof(struct xfs_inode_log_item), 0, 2023 SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, 2024 NULL); 2025 if (!xfs_ili_zone) 2026 goto out_destroy_inode_zone; 2027 2028 xfs_icreate_zone = kmem_cache_create("xfs_icr", 2029 sizeof(struct xfs_icreate_item), 2030 0, 0, NULL); 2031 if (!xfs_icreate_zone) 2032 goto out_destroy_ili_zone; 2033 2034 xfs_rud_zone = kmem_cache_create("xfs_rud_item", 2035 sizeof(struct xfs_rud_log_item), 2036 0, 0, NULL); 2037 if (!xfs_rud_zone) 2038 goto out_destroy_icreate_zone; 2039 2040 xfs_rui_zone = kmem_cache_create("xfs_rui_item", 2041 xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS), 2042 0, 0, NULL); 2043 if (!xfs_rui_zone) 2044 goto out_destroy_rud_zone; 2045 2046 xfs_cud_zone = kmem_cache_create("xfs_cud_item", 2047 sizeof(struct xfs_cud_log_item), 2048 0, 0, NULL); 2049 if (!xfs_cud_zone) 2050 goto out_destroy_rui_zone; 2051 2052 xfs_cui_zone = kmem_cache_create("xfs_cui_item", 2053 xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS), 2054 0, 0, NULL); 2055 if (!xfs_cui_zone) 2056 goto out_destroy_cud_zone; 2057 2058 xfs_bud_zone = kmem_cache_create("xfs_bud_item", 2059 sizeof(struct xfs_bud_log_item), 2060 0, 0, NULL); 2061 if (!xfs_bud_zone) 2062 goto out_destroy_cui_zone; 2063 2064 xfs_bui_zone = kmem_cache_create("xfs_bui_item", 2065 xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS), 2066 0, 0, NULL); 2067 if (!xfs_bui_zone) 2068 goto out_destroy_bud_zone; 2069 2070 return 0; 2071 2072 out_destroy_bud_zone: 2073 kmem_cache_destroy(xfs_bud_zone); 2074 out_destroy_cui_zone: 2075 kmem_cache_destroy(xfs_cui_zone); 2076 out_destroy_cud_zone: 2077 kmem_cache_destroy(xfs_cud_zone); 2078 out_destroy_rui_zone: 2079 kmem_cache_destroy(xfs_rui_zone); 2080 out_destroy_rud_zone: 2081 kmem_cache_destroy(xfs_rud_zone); 2082 out_destroy_icreate_zone: 2083 kmem_cache_destroy(xfs_icreate_zone); 2084 out_destroy_ili_zone: 2085 kmem_cache_destroy(xfs_ili_zone); 2086 out_destroy_inode_zone: 2087 kmem_cache_destroy(xfs_inode_zone); 2088 out_destroy_efi_zone: 2089 kmem_cache_destroy(xfs_efi_zone); 2090 out_destroy_efd_zone: 2091 kmem_cache_destroy(xfs_efd_zone); 2092 out_destroy_buf_item_zone: 2093 kmem_cache_destroy(xfs_buf_item_zone); 2094 out_destroy_trans_zone: 2095 kmem_cache_destroy(xfs_trans_zone); 2096 out_destroy_ifork_zone: 2097 kmem_cache_destroy(xfs_ifork_zone); 2098 out_destroy_da_state_zone: 2099 kmem_cache_destroy(xfs_da_state_zone); 2100 out_destroy_btree_cur_zone: 2101 kmem_cache_destroy(xfs_btree_cur_zone); 2102 out_destroy_bmap_free_item_zone: 2103 kmem_cache_destroy(xfs_bmap_free_item_zone); 2104 out_destroy_log_ticket_zone: 2105 kmem_cache_destroy(xfs_log_ticket_zone); 2106 out: 2107 return -ENOMEM; 2108 } 2109 2110 STATIC void 2111 xfs_destroy_zones(void) 2112 { 2113 /* 2114 * Make sure all delayed rcu free are flushed before we 2115 * destroy caches. 2116 */ 2117 rcu_barrier(); 2118 kmem_cache_destroy(xfs_bui_zone); 2119 kmem_cache_destroy(xfs_bud_zone); 2120 kmem_cache_destroy(xfs_cui_zone); 2121 kmem_cache_destroy(xfs_cud_zone); 2122 kmem_cache_destroy(xfs_rui_zone); 2123 kmem_cache_destroy(xfs_rud_zone); 2124 kmem_cache_destroy(xfs_icreate_zone); 2125 kmem_cache_destroy(xfs_ili_zone); 2126 kmem_cache_destroy(xfs_inode_zone); 2127 kmem_cache_destroy(xfs_efi_zone); 2128 kmem_cache_destroy(xfs_efd_zone); 2129 kmem_cache_destroy(xfs_buf_item_zone); 2130 kmem_cache_destroy(xfs_trans_zone); 2131 kmem_cache_destroy(xfs_ifork_zone); 2132 kmem_cache_destroy(xfs_da_state_zone); 2133 kmem_cache_destroy(xfs_btree_cur_zone); 2134 kmem_cache_destroy(xfs_bmap_free_item_zone); 2135 kmem_cache_destroy(xfs_log_ticket_zone); 2136 } 2137 2138 STATIC int __init 2139 xfs_init_workqueues(void) 2140 { 2141 /* 2142 * The allocation workqueue can be used in memory reclaim situations 2143 * (writepage path), and parallelism is only limited by the number of 2144 * AGs in all the filesystems mounted. Hence use the default large 2145 * max_active value for this workqueue. 2146 */ 2147 xfs_alloc_wq = alloc_workqueue("xfsalloc", 2148 XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0); 2149 if (!xfs_alloc_wq) 2150 return -ENOMEM; 2151 2152 xfs_discard_wq = alloc_workqueue("xfsdiscard", XFS_WQFLAGS(WQ_UNBOUND), 2153 0); 2154 if (!xfs_discard_wq) 2155 goto out_free_alloc_wq; 2156 2157 return 0; 2158 out_free_alloc_wq: 2159 destroy_workqueue(xfs_alloc_wq); 2160 return -ENOMEM; 2161 } 2162 2163 STATIC void 2164 xfs_destroy_workqueues(void) 2165 { 2166 destroy_workqueue(xfs_discard_wq); 2167 destroy_workqueue(xfs_alloc_wq); 2168 } 2169 2170 #ifdef CONFIG_HOTPLUG_CPU 2171 static int 2172 xfs_cpu_dead( 2173 unsigned int cpu) 2174 { 2175 struct xfs_mount *mp, *n; 2176 2177 spin_lock(&xfs_mount_list_lock); 2178 list_for_each_entry_safe(mp, n, &xfs_mount_list, m_mount_list) { 2179 spin_unlock(&xfs_mount_list_lock); 2180 xfs_inodegc_cpu_dead(mp, cpu); 2181 spin_lock(&xfs_mount_list_lock); 2182 } 2183 spin_unlock(&xfs_mount_list_lock); 2184 return 0; 2185 } 2186 2187 static int __init 2188 xfs_cpu_hotplug_init(void) 2189 { 2190 int error; 2191 2192 error = cpuhp_setup_state_nocalls(CPUHP_XFS_DEAD, "xfs:dead", NULL, 2193 xfs_cpu_dead); 2194 if (error < 0) 2195 xfs_alert(NULL, 2196 "Failed to initialise CPU hotplug, error %d. XFS is non-functional.", 2197 error); 2198 return error; 2199 } 2200 2201 static void 2202 xfs_cpu_hotplug_destroy(void) 2203 { 2204 cpuhp_remove_state_nocalls(CPUHP_XFS_DEAD); 2205 } 2206 2207 #else /* !CONFIG_HOTPLUG_CPU */ 2208 static inline int xfs_cpu_hotplug_init(void) { return 0; } 2209 static inline void xfs_cpu_hotplug_destroy(void) {} 2210 #endif 2211 2212 STATIC int __init 2213 init_xfs_fs(void) 2214 { 2215 int error; 2216 2217 xfs_check_ondisk_structs(); 2218 2219 printk(KERN_INFO XFS_VERSION_STRING " with " 2220 XFS_BUILD_OPTIONS " enabled\n"); 2221 2222 xfs_dir_startup(); 2223 2224 error = xfs_cpu_hotplug_init(); 2225 if (error) 2226 goto out; 2227 2228 error = xfs_init_zones(); 2229 if (error) 2230 goto out_destroy_hp; 2231 2232 error = xfs_init_workqueues(); 2233 if (error) 2234 goto out_destroy_zones; 2235 2236 error = xfs_mru_cache_init(); 2237 if (error) 2238 goto out_destroy_wq; 2239 2240 error = xfs_buf_init(); 2241 if (error) 2242 goto out_mru_cache_uninit; 2243 2244 error = xfs_init_procfs(); 2245 if (error) 2246 goto out_buf_terminate; 2247 2248 error = xfs_sysctl_register(); 2249 if (error) 2250 goto out_cleanup_procfs; 2251 2252 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj); 2253 if (!xfs_kset) { 2254 error = -ENOMEM; 2255 goto out_sysctl_unregister; 2256 } 2257 2258 xfsstats.xs_kobj.kobject.kset = xfs_kset; 2259 2260 xfsstats.xs_stats = alloc_percpu(struct xfsstats); 2261 if (!xfsstats.xs_stats) { 2262 error = -ENOMEM; 2263 goto out_kset_unregister; 2264 } 2265 2266 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL, 2267 "stats"); 2268 if (error) 2269 goto out_free_stats; 2270 2271 #ifdef DEBUG 2272 xfs_dbg_kobj.kobject.kset = xfs_kset; 2273 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug"); 2274 if (error) 2275 goto out_remove_stats_kobj; 2276 #endif 2277 2278 error = xfs_qm_init(); 2279 if (error) 2280 goto out_remove_dbg_kobj; 2281 2282 error = register_filesystem(&xfs_fs_type); 2283 if (error) 2284 goto out_qm_exit; 2285 return 0; 2286 2287 out_qm_exit: 2288 xfs_qm_exit(); 2289 out_remove_dbg_kobj: 2290 #ifdef DEBUG 2291 xfs_sysfs_del(&xfs_dbg_kobj); 2292 out_remove_stats_kobj: 2293 #endif 2294 xfs_sysfs_del(&xfsstats.xs_kobj); 2295 out_free_stats: 2296 free_percpu(xfsstats.xs_stats); 2297 out_kset_unregister: 2298 kset_unregister(xfs_kset); 2299 out_sysctl_unregister: 2300 xfs_sysctl_unregister(); 2301 out_cleanup_procfs: 2302 xfs_cleanup_procfs(); 2303 out_buf_terminate: 2304 xfs_buf_terminate(); 2305 out_mru_cache_uninit: 2306 xfs_mru_cache_uninit(); 2307 out_destroy_wq: 2308 xfs_destroy_workqueues(); 2309 out_destroy_zones: 2310 xfs_destroy_zones(); 2311 out_destroy_hp: 2312 xfs_cpu_hotplug_destroy(); 2313 out: 2314 return error; 2315 } 2316 2317 STATIC void __exit 2318 exit_xfs_fs(void) 2319 { 2320 xfs_qm_exit(); 2321 unregister_filesystem(&xfs_fs_type); 2322 #ifdef DEBUG 2323 xfs_sysfs_del(&xfs_dbg_kobj); 2324 #endif 2325 xfs_sysfs_del(&xfsstats.xs_kobj); 2326 free_percpu(xfsstats.xs_stats); 2327 kset_unregister(xfs_kset); 2328 xfs_sysctl_unregister(); 2329 xfs_cleanup_procfs(); 2330 xfs_buf_terminate(); 2331 xfs_mru_cache_uninit(); 2332 xfs_destroy_workqueues(); 2333 xfs_destroy_zones(); 2334 xfs_uuid_table_free(); 2335 xfs_cpu_hotplug_destroy(); 2336 } 2337 2338 module_init(init_xfs_fs); 2339 module_exit(exit_xfs_fs); 2340 2341 MODULE_AUTHOR("Silicon Graphics, Inc."); 2342 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 2343 MODULE_LICENSE("GPL"); 2344