1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ 9 10 #include <linux/bio.h> 11 #include <linux/sched.h> 12 #include <linux/slab.h> 13 #include <linux/spinlock.h> 14 #include <linux/completion.h> 15 #include <linux/buffer_head.h> 16 #include <linux/statfs.h> 17 #include <linux/seq_file.h> 18 #include <linux/mount.h> 19 #include <linux/kthread.h> 20 #include <linux/delay.h> 21 #include <linux/gfs2_ondisk.h> 22 #include <linux/crc32.h> 23 #include <linux/time.h> 24 #include <linux/wait.h> 25 #include <linux/writeback.h> 26 27 #include "gfs2.h" 28 #include "incore.h" 29 #include "bmap.h" 30 #include "dir.h" 31 #include "glock.h" 32 #include "glops.h" 33 #include "inode.h" 34 #include "log.h" 35 #include "meta_io.h" 36 #include "quota.h" 37 #include "recovery.h" 38 #include "rgrp.h" 39 #include "super.h" 40 #include "trans.h" 41 #include "util.h" 42 #include "sys.h" 43 #include "xattr.h" 44 45 #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) 46 47 enum { 48 Opt_lockproto, 49 Opt_locktable, 50 Opt_hostdata, 51 Opt_spectator, 52 Opt_ignore_local_fs, 53 Opt_localflocks, 54 Opt_localcaching, 55 Opt_debug, 56 Opt_nodebug, 57 Opt_upgrade, 58 Opt_acl, 59 Opt_noacl, 60 Opt_quota_off, 61 Opt_quota_account, 62 Opt_quota_on, 63 Opt_quota, 64 Opt_noquota, 65 Opt_suiddir, 66 Opt_nosuiddir, 67 Opt_data_writeback, 68 Opt_data_ordered, 69 Opt_meta, 70 Opt_discard, 71 Opt_nodiscard, 72 Opt_commit, 73 Opt_err_withdraw, 74 Opt_err_panic, 75 Opt_statfs_quantum, 76 Opt_statfs_percent, 77 Opt_quota_quantum, 78 Opt_barrier, 79 Opt_nobarrier, 80 Opt_error, 81 }; 82 83 static const match_table_t tokens = { 84 {Opt_lockproto, "lockproto=%s"}, 85 {Opt_locktable, "locktable=%s"}, 86 {Opt_hostdata, "hostdata=%s"}, 87 {Opt_spectator, "spectator"}, 88 {Opt_spectator, "norecovery"}, 89 {Opt_ignore_local_fs, "ignore_local_fs"}, 90 {Opt_localflocks, "localflocks"}, 91 {Opt_localcaching, "localcaching"}, 92 {Opt_debug, "debug"}, 93 {Opt_nodebug, "nodebug"}, 94 {Opt_upgrade, "upgrade"}, 95 {Opt_acl, "acl"}, 96 {Opt_noacl, "noacl"}, 97 {Opt_quota_off, "quota=off"}, 98 {Opt_quota_account, "quota=account"}, 99 {Opt_quota_on, "quota=on"}, 100 {Opt_quota, "quota"}, 101 {Opt_noquota, "noquota"}, 102 {Opt_suiddir, "suiddir"}, 103 {Opt_nosuiddir, "nosuiddir"}, 104 {Opt_data_writeback, "data=writeback"}, 105 {Opt_data_ordered, "data=ordered"}, 106 {Opt_meta, "meta"}, 107 {Opt_discard, "discard"}, 108 {Opt_nodiscard, "nodiscard"}, 109 {Opt_commit, "commit=%d"}, 110 {Opt_err_withdraw, "errors=withdraw"}, 111 {Opt_err_panic, "errors=panic"}, 112 {Opt_statfs_quantum, "statfs_quantum=%d"}, 113 {Opt_statfs_percent, "statfs_percent=%d"}, 114 {Opt_quota_quantum, "quota_quantum=%d"}, 115 {Opt_barrier, "barrier"}, 116 {Opt_nobarrier, "nobarrier"}, 117 {Opt_error, NULL} 118 }; 119 120 /** 121 * gfs2_mount_args - Parse mount options 122 * @args: The structure into which the parsed options will be written 123 * @options: The options to parse 124 * 125 * Return: errno 126 */ 127 128 int gfs2_mount_args(struct gfs2_args *args, char *options) 129 { 130 char *o; 131 int token; 132 substring_t tmp[MAX_OPT_ARGS]; 133 int rv; 134 135 /* Split the options into tokens with the "," character and 136 process them */ 137 138 while (1) { 139 o = strsep(&options, ","); 140 if (o == NULL) 141 break; 142 if (*o == '\0') 143 continue; 144 145 token = match_token(o, tokens, tmp); 146 switch (token) { 147 case Opt_lockproto: 148 match_strlcpy(args->ar_lockproto, &tmp[0], 149 GFS2_LOCKNAME_LEN); 150 break; 151 case Opt_locktable: 152 match_strlcpy(args->ar_locktable, &tmp[0], 153 GFS2_LOCKNAME_LEN); 154 break; 155 case Opt_hostdata: 156 match_strlcpy(args->ar_hostdata, &tmp[0], 157 GFS2_LOCKNAME_LEN); 158 break; 159 case Opt_spectator: 160 args->ar_spectator = 1; 161 break; 162 case Opt_ignore_local_fs: 163 /* Retained for backwards compat only */ 164 break; 165 case Opt_localflocks: 166 args->ar_localflocks = 1; 167 break; 168 case Opt_localcaching: 169 /* Retained for backwards compat only */ 170 break; 171 case Opt_debug: 172 if (args->ar_errors == GFS2_ERRORS_PANIC) { 173 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 174 "are mutually exclusive.\n"); 175 return -EINVAL; 176 } 177 args->ar_debug = 1; 178 break; 179 case Opt_nodebug: 180 args->ar_debug = 0; 181 break; 182 case Opt_upgrade: 183 /* Retained for backwards compat only */ 184 break; 185 case Opt_acl: 186 args->ar_posix_acl = 1; 187 break; 188 case Opt_noacl: 189 args->ar_posix_acl = 0; 190 break; 191 case Opt_quota_off: 192 case Opt_noquota: 193 args->ar_quota = GFS2_QUOTA_OFF; 194 break; 195 case Opt_quota_account: 196 args->ar_quota = GFS2_QUOTA_ACCOUNT; 197 break; 198 case Opt_quota_on: 199 case Opt_quota: 200 args->ar_quota = GFS2_QUOTA_ON; 201 break; 202 case Opt_suiddir: 203 args->ar_suiddir = 1; 204 break; 205 case Opt_nosuiddir: 206 args->ar_suiddir = 0; 207 break; 208 case Opt_data_writeback: 209 args->ar_data = GFS2_DATA_WRITEBACK; 210 break; 211 case Opt_data_ordered: 212 args->ar_data = GFS2_DATA_ORDERED; 213 break; 214 case Opt_meta: 215 args->ar_meta = 1; 216 break; 217 case Opt_discard: 218 args->ar_discard = 1; 219 break; 220 case Opt_nodiscard: 221 args->ar_discard = 0; 222 break; 223 case Opt_commit: 224 rv = match_int(&tmp[0], &args->ar_commit); 225 if (rv || args->ar_commit <= 0) { 226 printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n"); 227 return rv ? rv : -EINVAL; 228 } 229 break; 230 case Opt_statfs_quantum: 231 rv = match_int(&tmp[0], &args->ar_statfs_quantum); 232 if (rv || args->ar_statfs_quantum < 0) { 233 printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n"); 234 return rv ? rv : -EINVAL; 235 } 236 break; 237 case Opt_quota_quantum: 238 rv = match_int(&tmp[0], &args->ar_quota_quantum); 239 if (rv || args->ar_quota_quantum <= 0) { 240 printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n"); 241 return rv ? rv : -EINVAL; 242 } 243 break; 244 case Opt_statfs_percent: 245 rv = match_int(&tmp[0], &args->ar_statfs_percent); 246 if (rv || args->ar_statfs_percent < 0 || 247 args->ar_statfs_percent > 100) { 248 printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n"); 249 return rv ? rv : -EINVAL; 250 } 251 break; 252 case Opt_err_withdraw: 253 args->ar_errors = GFS2_ERRORS_WITHDRAW; 254 break; 255 case Opt_err_panic: 256 if (args->ar_debug) { 257 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 258 "are mutually exclusive.\n"); 259 return -EINVAL; 260 } 261 args->ar_errors = GFS2_ERRORS_PANIC; 262 break; 263 case Opt_barrier: 264 args->ar_nobarrier = 0; 265 break; 266 case Opt_nobarrier: 267 args->ar_nobarrier = 1; 268 break; 269 case Opt_error: 270 default: 271 printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o); 272 return -EINVAL; 273 } 274 } 275 276 return 0; 277 } 278 279 /** 280 * gfs2_jindex_free - Clear all the journal index information 281 * @sdp: The GFS2 superblock 282 * 283 */ 284 285 void gfs2_jindex_free(struct gfs2_sbd *sdp) 286 { 287 struct list_head list, *head; 288 struct gfs2_jdesc *jd; 289 struct gfs2_journal_extent *jext; 290 291 spin_lock(&sdp->sd_jindex_spin); 292 list_add(&list, &sdp->sd_jindex_list); 293 list_del_init(&sdp->sd_jindex_list); 294 sdp->sd_journals = 0; 295 spin_unlock(&sdp->sd_jindex_spin); 296 297 while (!list_empty(&list)) { 298 jd = list_entry(list.next, struct gfs2_jdesc, jd_list); 299 head = &jd->extent_list; 300 while (!list_empty(head)) { 301 jext = list_entry(head->next, 302 struct gfs2_journal_extent, 303 extent_list); 304 list_del(&jext->extent_list); 305 kfree(jext); 306 } 307 list_del(&jd->jd_list); 308 iput(jd->jd_inode); 309 kfree(jd); 310 } 311 } 312 313 static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) 314 { 315 struct gfs2_jdesc *jd; 316 int found = 0; 317 318 list_for_each_entry(jd, head, jd_list) { 319 if (jd->jd_jid == jid) { 320 found = 1; 321 break; 322 } 323 } 324 325 if (!found) 326 jd = NULL; 327 328 return jd; 329 } 330 331 struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) 332 { 333 struct gfs2_jdesc *jd; 334 335 spin_lock(&sdp->sd_jindex_spin); 336 jd = jdesc_find_i(&sdp->sd_jindex_list, jid); 337 spin_unlock(&sdp->sd_jindex_spin); 338 339 return jd; 340 } 341 342 int gfs2_jdesc_check(struct gfs2_jdesc *jd) 343 { 344 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 345 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 346 u64 size = i_size_read(jd->jd_inode); 347 348 if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, 1 << 30)) 349 return -EIO; 350 351 jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift; 352 353 if (gfs2_write_alloc_required(ip, 0, size)) { 354 gfs2_consist_inode(ip); 355 return -EIO; 356 } 357 358 return 0; 359 } 360 361 /** 362 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one 363 * @sdp: the filesystem 364 * 365 * Returns: errno 366 */ 367 368 int gfs2_make_fs_rw(struct gfs2_sbd *sdp) 369 { 370 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); 371 struct gfs2_glock *j_gl = ip->i_gl; 372 struct gfs2_holder t_gh; 373 struct gfs2_log_header_host head; 374 int error; 375 376 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); 377 if (error) 378 return error; 379 380 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); 381 382 error = gfs2_find_jhead(sdp->sd_jdesc, &head); 383 if (error) 384 goto fail; 385 386 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 387 gfs2_consist(sdp); 388 error = -EIO; 389 goto fail; 390 } 391 392 /* Initialize some head of the log stuff */ 393 sdp->sd_log_sequence = head.lh_sequence + 1; 394 gfs2_log_pointers_init(sdp, head.lh_blkno); 395 396 error = gfs2_quota_init(sdp); 397 if (error) 398 goto fail; 399 400 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 401 402 gfs2_glock_dq_uninit(&t_gh); 403 404 return 0; 405 406 fail: 407 t_gh.gh_flags |= GL_NOCACHE; 408 gfs2_glock_dq_uninit(&t_gh); 409 410 return error; 411 } 412 413 void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) 414 { 415 const struct gfs2_statfs_change *str = buf; 416 417 sc->sc_total = be64_to_cpu(str->sc_total); 418 sc->sc_free = be64_to_cpu(str->sc_free); 419 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); 420 } 421 422 static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) 423 { 424 struct gfs2_statfs_change *str = buf; 425 426 str->sc_total = cpu_to_be64(sc->sc_total); 427 str->sc_free = cpu_to_be64(sc->sc_free); 428 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); 429 } 430 431 int gfs2_statfs_init(struct gfs2_sbd *sdp) 432 { 433 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 434 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 435 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 436 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 437 struct buffer_head *m_bh, *l_bh; 438 struct gfs2_holder gh; 439 int error; 440 441 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 442 &gh); 443 if (error) 444 return error; 445 446 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 447 if (error) 448 goto out; 449 450 if (sdp->sd_args.ar_spectator) { 451 spin_lock(&sdp->sd_statfs_spin); 452 gfs2_statfs_change_in(m_sc, m_bh->b_data + 453 sizeof(struct gfs2_dinode)); 454 spin_unlock(&sdp->sd_statfs_spin); 455 } else { 456 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 457 if (error) 458 goto out_m_bh; 459 460 spin_lock(&sdp->sd_statfs_spin); 461 gfs2_statfs_change_in(m_sc, m_bh->b_data + 462 sizeof(struct gfs2_dinode)); 463 gfs2_statfs_change_in(l_sc, l_bh->b_data + 464 sizeof(struct gfs2_dinode)); 465 spin_unlock(&sdp->sd_statfs_spin); 466 467 brelse(l_bh); 468 } 469 470 out_m_bh: 471 brelse(m_bh); 472 out: 473 gfs2_glock_dq_uninit(&gh); 474 return 0; 475 } 476 477 void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, 478 s64 dinodes) 479 { 480 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 481 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 482 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 483 struct buffer_head *l_bh; 484 s64 x, y; 485 int need_sync = 0; 486 int error; 487 488 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 489 if (error) 490 return; 491 492 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 493 494 spin_lock(&sdp->sd_statfs_spin); 495 l_sc->sc_total += total; 496 l_sc->sc_free += free; 497 l_sc->sc_dinodes += dinodes; 498 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); 499 if (sdp->sd_args.ar_statfs_percent) { 500 x = 100 * l_sc->sc_free; 501 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; 502 if (x >= y || x <= -y) 503 need_sync = 1; 504 } 505 spin_unlock(&sdp->sd_statfs_spin); 506 507 brelse(l_bh); 508 if (need_sync) 509 gfs2_wake_up_statfs(sdp); 510 } 511 512 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, 513 struct buffer_head *l_bh) 514 { 515 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 516 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 517 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 518 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 519 520 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 521 522 spin_lock(&sdp->sd_statfs_spin); 523 m_sc->sc_total += l_sc->sc_total; 524 m_sc->sc_free += l_sc->sc_free; 525 m_sc->sc_dinodes += l_sc->sc_dinodes; 526 memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); 527 memset(l_bh->b_data + sizeof(struct gfs2_dinode), 528 0, sizeof(struct gfs2_statfs_change)); 529 spin_unlock(&sdp->sd_statfs_spin); 530 531 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); 532 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); 533 } 534 535 int gfs2_statfs_sync(struct super_block *sb, int type) 536 { 537 struct gfs2_sbd *sdp = sb->s_fs_info; 538 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 539 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 540 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 541 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 542 struct gfs2_holder gh; 543 struct buffer_head *m_bh, *l_bh; 544 int error; 545 546 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 547 &gh); 548 if (error) 549 return error; 550 551 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 552 if (error) 553 goto out; 554 555 spin_lock(&sdp->sd_statfs_spin); 556 gfs2_statfs_change_in(m_sc, m_bh->b_data + 557 sizeof(struct gfs2_dinode)); 558 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { 559 spin_unlock(&sdp->sd_statfs_spin); 560 goto out_bh; 561 } 562 spin_unlock(&sdp->sd_statfs_spin); 563 564 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 565 if (error) 566 goto out_bh; 567 568 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); 569 if (error) 570 goto out_bh2; 571 572 update_statfs(sdp, m_bh, l_bh); 573 sdp->sd_statfs_force_sync = 0; 574 575 gfs2_trans_end(sdp); 576 577 out_bh2: 578 brelse(l_bh); 579 out_bh: 580 brelse(m_bh); 581 out: 582 gfs2_glock_dq_uninit(&gh); 583 return error; 584 } 585 586 struct lfcc { 587 struct list_head list; 588 struct gfs2_holder gh; 589 }; 590 591 /** 592 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all 593 * journals are clean 594 * @sdp: the file system 595 * @state: the state to put the transaction lock into 596 * @t_gh: the hold on the transaction lock 597 * 598 * Returns: errno 599 */ 600 601 static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, 602 struct gfs2_holder *t_gh) 603 { 604 struct gfs2_inode *ip; 605 struct gfs2_jdesc *jd; 606 struct lfcc *lfcc; 607 LIST_HEAD(list); 608 struct gfs2_log_header_host lh; 609 int error; 610 611 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 612 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); 613 if (!lfcc) { 614 error = -ENOMEM; 615 goto out; 616 } 617 ip = GFS2_I(jd->jd_inode); 618 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); 619 if (error) { 620 kfree(lfcc); 621 goto out; 622 } 623 list_add(&lfcc->list, &list); 624 } 625 626 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, 627 GL_NOCACHE, t_gh); 628 629 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 630 error = gfs2_jdesc_check(jd); 631 if (error) 632 break; 633 error = gfs2_find_jhead(jd, &lh); 634 if (error) 635 break; 636 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 637 error = -EBUSY; 638 break; 639 } 640 } 641 642 if (error) 643 gfs2_glock_dq_uninit(t_gh); 644 645 out: 646 while (!list_empty(&list)) { 647 lfcc = list_entry(list.next, struct lfcc, list); 648 list_del(&lfcc->list); 649 gfs2_glock_dq_uninit(&lfcc->gh); 650 kfree(lfcc); 651 } 652 return error; 653 } 654 655 /** 656 * gfs2_freeze_fs - freezes the file system 657 * @sdp: the file system 658 * 659 * This function flushes data and meta data for all machines by 660 * aquiring the transaction log exclusively. All journals are 661 * ensured to be in a clean state as well. 662 * 663 * Returns: errno 664 */ 665 666 int gfs2_freeze_fs(struct gfs2_sbd *sdp) 667 { 668 int error = 0; 669 670 mutex_lock(&sdp->sd_freeze_lock); 671 672 if (!sdp->sd_freeze_count++) { 673 error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); 674 if (error) 675 sdp->sd_freeze_count--; 676 } 677 678 mutex_unlock(&sdp->sd_freeze_lock); 679 680 return error; 681 } 682 683 /** 684 * gfs2_unfreeze_fs - unfreezes the file system 685 * @sdp: the file system 686 * 687 * This function allows the file system to proceed by unlocking 688 * the exclusively held transaction lock. Other GFS2 nodes are 689 * now free to acquire the lock shared and go on with their lives. 690 * 691 */ 692 693 void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) 694 { 695 mutex_lock(&sdp->sd_freeze_lock); 696 697 if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) 698 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 699 700 mutex_unlock(&sdp->sd_freeze_lock); 701 } 702 703 704 /** 705 * gfs2_write_inode - Make sure the inode is stable on the disk 706 * @inode: The inode 707 * @sync: synchronous write flag 708 * 709 * Returns: errno 710 */ 711 712 static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) 713 { 714 struct gfs2_inode *ip = GFS2_I(inode); 715 struct gfs2_sbd *sdp = GFS2_SB(inode); 716 struct gfs2_holder gh; 717 struct buffer_head *bh; 718 struct timespec atime; 719 struct gfs2_dinode *di; 720 int ret = 0; 721 722 /* Check this is a "normal" inode, etc */ 723 if (current->flags & PF_MEMALLOC) 724 return 0; 725 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 726 if (ret) 727 goto do_flush; 728 ret = gfs2_trans_begin(sdp, RES_DINODE, 0); 729 if (ret) 730 goto do_unlock; 731 ret = gfs2_meta_inode_buffer(ip, &bh); 732 if (ret == 0) { 733 di = (struct gfs2_dinode *)bh->b_data; 734 atime.tv_sec = be64_to_cpu(di->di_atime); 735 atime.tv_nsec = be32_to_cpu(di->di_atime_nsec); 736 if (timespec_compare(&inode->i_atime, &atime) > 0) { 737 gfs2_trans_add_bh(ip->i_gl, bh, 1); 738 gfs2_dinode_out(ip, bh->b_data); 739 } 740 brelse(bh); 741 } 742 gfs2_trans_end(sdp); 743 do_unlock: 744 gfs2_glock_dq_uninit(&gh); 745 do_flush: 746 if (wbc->sync_mode == WB_SYNC_ALL) 747 gfs2_log_flush(GFS2_SB(inode), ip->i_gl); 748 return ret; 749 } 750 751 /** 752 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one 753 * @sdp: the filesystem 754 * 755 * Returns: errno 756 */ 757 758 static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) 759 { 760 struct gfs2_holder t_gh; 761 int error; 762 763 flush_workqueue(gfs2_delete_workqueue); 764 gfs2_quota_sync(sdp->sd_vfs, 0, 1); 765 gfs2_statfs_sync(sdp->sd_vfs, 0); 766 767 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, 768 &t_gh); 769 if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 770 return error; 771 772 gfs2_meta_syncfs(sdp); 773 gfs2_log_shutdown(sdp); 774 775 clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 776 777 if (t_gh.gh_gl) 778 gfs2_glock_dq_uninit(&t_gh); 779 780 gfs2_quota_cleanup(sdp); 781 782 return error; 783 } 784 785 static int gfs2_umount_recovery_wait(void *word) 786 { 787 schedule(); 788 return 0; 789 } 790 791 /** 792 * gfs2_put_super - Unmount the filesystem 793 * @sb: The VFS superblock 794 * 795 */ 796 797 static void gfs2_put_super(struct super_block *sb) 798 { 799 struct gfs2_sbd *sdp = sb->s_fs_info; 800 int error; 801 struct gfs2_jdesc *jd; 802 803 /* Unfreeze the filesystem, if we need to */ 804 805 mutex_lock(&sdp->sd_freeze_lock); 806 if (sdp->sd_freeze_count) 807 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 808 mutex_unlock(&sdp->sd_freeze_lock); 809 810 /* No more recovery requests */ 811 set_bit(SDF_NORECOVERY, &sdp->sd_flags); 812 smp_mb(); 813 814 /* Wait on outstanding recovery */ 815 restart: 816 spin_lock(&sdp->sd_jindex_spin); 817 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 818 if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) 819 continue; 820 spin_unlock(&sdp->sd_jindex_spin); 821 wait_on_bit(&jd->jd_flags, JDF_RECOVERY, 822 gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE); 823 goto restart; 824 } 825 spin_unlock(&sdp->sd_jindex_spin); 826 827 kthread_stop(sdp->sd_quotad_process); 828 kthread_stop(sdp->sd_logd_process); 829 830 if (!(sb->s_flags & MS_RDONLY)) { 831 error = gfs2_make_fs_ro(sdp); 832 if (error) 833 gfs2_io_error(sdp); 834 } 835 /* At this point, we're through modifying the disk */ 836 837 /* Release stuff */ 838 839 iput(sdp->sd_jindex); 840 iput(sdp->sd_statfs_inode); 841 iput(sdp->sd_rindex); 842 iput(sdp->sd_quota_inode); 843 844 gfs2_glock_put(sdp->sd_rename_gl); 845 gfs2_glock_put(sdp->sd_trans_gl); 846 847 if (!sdp->sd_args.ar_spectator) { 848 gfs2_glock_dq_uninit(&sdp->sd_journal_gh); 849 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); 850 gfs2_glock_dq_uninit(&sdp->sd_sc_gh); 851 gfs2_glock_dq_uninit(&sdp->sd_qc_gh); 852 iput(sdp->sd_sc_inode); 853 iput(sdp->sd_qc_inode); 854 } 855 856 gfs2_glock_dq_uninit(&sdp->sd_live_gh); 857 gfs2_clear_rgrpd(sdp); 858 gfs2_jindex_free(sdp); 859 /* Take apart glock structures and buffer lists */ 860 gfs2_gl_hash_clear(sdp); 861 /* Unmount the locking protocol */ 862 gfs2_lm_unmount(sdp); 863 864 /* At this point, we're through participating in the lockspace */ 865 gfs2_sys_fs_del(sdp); 866 } 867 868 /** 869 * gfs2_sync_fs - sync the filesystem 870 * @sb: the superblock 871 * 872 * Flushes the log to disk. 873 */ 874 875 static int gfs2_sync_fs(struct super_block *sb, int wait) 876 { 877 if (wait && sb->s_fs_info) 878 gfs2_log_flush(sb->s_fs_info, NULL); 879 return 0; 880 } 881 882 /** 883 * gfs2_freeze - prevent further writes to the filesystem 884 * @sb: the VFS structure for the filesystem 885 * 886 */ 887 888 static int gfs2_freeze(struct super_block *sb) 889 { 890 struct gfs2_sbd *sdp = sb->s_fs_info; 891 int error; 892 893 if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 894 return -EINVAL; 895 896 for (;;) { 897 error = gfs2_freeze_fs(sdp); 898 if (!error) 899 break; 900 901 switch (error) { 902 case -EBUSY: 903 fs_err(sdp, "waiting for recovery before freeze\n"); 904 break; 905 906 default: 907 fs_err(sdp, "error freezing FS: %d\n", error); 908 break; 909 } 910 911 fs_err(sdp, "retrying...\n"); 912 msleep(1000); 913 } 914 return 0; 915 } 916 917 /** 918 * gfs2_unfreeze - reallow writes to the filesystem 919 * @sb: the VFS structure for the filesystem 920 * 921 */ 922 923 static int gfs2_unfreeze(struct super_block *sb) 924 { 925 gfs2_unfreeze_fs(sb->s_fs_info); 926 return 0; 927 } 928 929 /** 930 * statfs_fill - fill in the sg for a given RG 931 * @rgd: the RG 932 * @sc: the sc structure 933 * 934 * Returns: 0 on success, -ESTALE if the LVB is invalid 935 */ 936 937 static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 938 struct gfs2_statfs_change_host *sc) 939 { 940 gfs2_rgrp_verify(rgd); 941 sc->sc_total += rgd->rd_data; 942 sc->sc_free += rgd->rd_free; 943 sc->sc_dinodes += rgd->rd_dinodes; 944 return 0; 945 } 946 947 /** 948 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 949 * @sdp: the filesystem 950 * @sc: the sc info that will be returned 951 * 952 * Any error (other than a signal) will cause this routine to fall back 953 * to the synchronous version. 954 * 955 * FIXME: This really shouldn't busy wait like this. 956 * 957 * Returns: errno 958 */ 959 960 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 961 { 962 struct gfs2_holder ri_gh; 963 struct gfs2_rgrpd *rgd_next; 964 struct gfs2_holder *gha, *gh; 965 unsigned int slots = 64; 966 unsigned int x; 967 int done; 968 int error = 0, err; 969 970 memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 971 gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 972 if (!gha) 973 return -ENOMEM; 974 975 error = gfs2_rindex_hold(sdp, &ri_gh); 976 if (error) 977 goto out; 978 979 rgd_next = gfs2_rgrpd_get_first(sdp); 980 981 for (;;) { 982 done = 1; 983 984 for (x = 0; x < slots; x++) { 985 gh = gha + x; 986 987 if (gh->gh_gl && gfs2_glock_poll(gh)) { 988 err = gfs2_glock_wait(gh); 989 if (err) { 990 gfs2_holder_uninit(gh); 991 error = err; 992 } else { 993 if (!error) 994 error = statfs_slow_fill( 995 gh->gh_gl->gl_object, sc); 996 gfs2_glock_dq_uninit(gh); 997 } 998 } 999 1000 if (gh->gh_gl) 1001 done = 0; 1002 else if (rgd_next && !error) { 1003 error = gfs2_glock_nq_init(rgd_next->rd_gl, 1004 LM_ST_SHARED, 1005 GL_ASYNC, 1006 gh); 1007 rgd_next = gfs2_rgrpd_get_next(rgd_next); 1008 done = 0; 1009 } 1010 1011 if (signal_pending(current)) 1012 error = -ERESTARTSYS; 1013 } 1014 1015 if (done) 1016 break; 1017 1018 yield(); 1019 } 1020 1021 gfs2_glock_dq_uninit(&ri_gh); 1022 1023 out: 1024 kfree(gha); 1025 return error; 1026 } 1027 1028 /** 1029 * gfs2_statfs_i - Do a statfs 1030 * @sdp: the filesystem 1031 * @sg: the sg structure 1032 * 1033 * Returns: errno 1034 */ 1035 1036 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 1037 { 1038 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 1039 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 1040 1041 spin_lock(&sdp->sd_statfs_spin); 1042 1043 *sc = *m_sc; 1044 sc->sc_total += l_sc->sc_total; 1045 sc->sc_free += l_sc->sc_free; 1046 sc->sc_dinodes += l_sc->sc_dinodes; 1047 1048 spin_unlock(&sdp->sd_statfs_spin); 1049 1050 if (sc->sc_free < 0) 1051 sc->sc_free = 0; 1052 if (sc->sc_free > sc->sc_total) 1053 sc->sc_free = sc->sc_total; 1054 if (sc->sc_dinodes < 0) 1055 sc->sc_dinodes = 0; 1056 1057 return 0; 1058 } 1059 1060 /** 1061 * gfs2_statfs - Gather and return stats about the filesystem 1062 * @sb: The superblock 1063 * @statfsbuf: The buffer 1064 * 1065 * Returns: 0 on success or error code 1066 */ 1067 1068 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1069 { 1070 struct super_block *sb = dentry->d_inode->i_sb; 1071 struct gfs2_sbd *sdp = sb->s_fs_info; 1072 struct gfs2_statfs_change_host sc; 1073 int error; 1074 1075 if (gfs2_tune_get(sdp, gt_statfs_slow)) 1076 error = gfs2_statfs_slow(sdp, &sc); 1077 else 1078 error = gfs2_statfs_i(sdp, &sc); 1079 1080 if (error) 1081 return error; 1082 1083 buf->f_type = GFS2_MAGIC; 1084 buf->f_bsize = sdp->sd_sb.sb_bsize; 1085 buf->f_blocks = sc.sc_total; 1086 buf->f_bfree = sc.sc_free; 1087 buf->f_bavail = sc.sc_free; 1088 buf->f_files = sc.sc_dinodes + sc.sc_free; 1089 buf->f_ffree = sc.sc_free; 1090 buf->f_namelen = GFS2_FNAMESIZE; 1091 1092 return 0; 1093 } 1094 1095 /** 1096 * gfs2_remount_fs - called when the FS is remounted 1097 * @sb: the filesystem 1098 * @flags: the remount flags 1099 * @data: extra data passed in (not used right now) 1100 * 1101 * Returns: errno 1102 */ 1103 1104 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) 1105 { 1106 struct gfs2_sbd *sdp = sb->s_fs_info; 1107 struct gfs2_args args = sdp->sd_args; /* Default to current settings */ 1108 struct gfs2_tune *gt = &sdp->sd_tune; 1109 int error; 1110 1111 spin_lock(>->gt_spin); 1112 args.ar_commit = gt->gt_logd_secs; 1113 args.ar_quota_quantum = gt->gt_quota_quantum; 1114 if (gt->gt_statfs_slow) 1115 args.ar_statfs_quantum = 0; 1116 else 1117 args.ar_statfs_quantum = gt->gt_statfs_quantum; 1118 spin_unlock(>->gt_spin); 1119 error = gfs2_mount_args(&args, data); 1120 if (error) 1121 return error; 1122 1123 /* Not allowed to change locking details */ 1124 if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || 1125 strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || 1126 strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) 1127 return -EINVAL; 1128 1129 /* Some flags must not be changed */ 1130 if (args_neq(&args, &sdp->sd_args, spectator) || 1131 args_neq(&args, &sdp->sd_args, localflocks) || 1132 args_neq(&args, &sdp->sd_args, meta)) 1133 return -EINVAL; 1134 1135 if (sdp->sd_args.ar_spectator) 1136 *flags |= MS_RDONLY; 1137 1138 if ((sb->s_flags ^ *flags) & MS_RDONLY) { 1139 if (*flags & MS_RDONLY) 1140 error = gfs2_make_fs_ro(sdp); 1141 else 1142 error = gfs2_make_fs_rw(sdp); 1143 if (error) 1144 return error; 1145 } 1146 1147 sdp->sd_args = args; 1148 if (sdp->sd_args.ar_posix_acl) 1149 sb->s_flags |= MS_POSIXACL; 1150 else 1151 sb->s_flags &= ~MS_POSIXACL; 1152 if (sdp->sd_args.ar_nobarrier) 1153 set_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1154 else 1155 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1156 spin_lock(>->gt_spin); 1157 gt->gt_logd_secs = args.ar_commit; 1158 gt->gt_quota_quantum = args.ar_quota_quantum; 1159 if (args.ar_statfs_quantum) { 1160 gt->gt_statfs_slow = 0; 1161 gt->gt_statfs_quantum = args.ar_statfs_quantum; 1162 } 1163 else { 1164 gt->gt_statfs_slow = 1; 1165 gt->gt_statfs_quantum = 30; 1166 } 1167 spin_unlock(>->gt_spin); 1168 1169 gfs2_online_uevent(sdp); 1170 return 0; 1171 } 1172 1173 /** 1174 * gfs2_drop_inode - Drop an inode (test for remote unlink) 1175 * @inode: The inode to drop 1176 * 1177 * If we've received a callback on an iopen lock then its because a 1178 * remote node tried to deallocate the inode but failed due to this node 1179 * still having the inode open. Here we mark the link count zero 1180 * since we know that it must have reached zero if the GLF_DEMOTE flag 1181 * is set on the iopen glock. If we didn't do a disk read since the 1182 * remote node removed the final link then we might otherwise miss 1183 * this event. This check ensures that this node will deallocate the 1184 * inode's blocks, or alternatively pass the baton on to another 1185 * node for later deallocation. 1186 */ 1187 1188 static int gfs2_drop_inode(struct inode *inode) 1189 { 1190 struct gfs2_inode *ip = GFS2_I(inode); 1191 1192 if (inode->i_nlink) { 1193 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1194 if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) 1195 clear_nlink(inode); 1196 } 1197 return generic_drop_inode(inode); 1198 } 1199 1200 static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 1201 { 1202 do { 1203 if (d1 == d2) 1204 return 1; 1205 d1 = d1->d_parent; 1206 } while (!IS_ROOT(d1)); 1207 return 0; 1208 } 1209 1210 /** 1211 * gfs2_show_options - Show mount options for /proc/mounts 1212 * @s: seq_file structure 1213 * @mnt: vfsmount 1214 * 1215 * Returns: 0 on success or error code 1216 */ 1217 1218 static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1219 { 1220 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; 1221 struct gfs2_args *args = &sdp->sd_args; 1222 int val; 1223 1224 if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) 1225 seq_printf(s, ",meta"); 1226 if (args->ar_lockproto[0]) 1227 seq_printf(s, ",lockproto=%s", args->ar_lockproto); 1228 if (args->ar_locktable[0]) 1229 seq_printf(s, ",locktable=%s", args->ar_locktable); 1230 if (args->ar_hostdata[0]) 1231 seq_printf(s, ",hostdata=%s", args->ar_hostdata); 1232 if (args->ar_spectator) 1233 seq_printf(s, ",spectator"); 1234 if (args->ar_localflocks) 1235 seq_printf(s, ",localflocks"); 1236 if (args->ar_debug) 1237 seq_printf(s, ",debug"); 1238 if (args->ar_posix_acl) 1239 seq_printf(s, ",acl"); 1240 if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 1241 char *state; 1242 switch (args->ar_quota) { 1243 case GFS2_QUOTA_OFF: 1244 state = "off"; 1245 break; 1246 case GFS2_QUOTA_ACCOUNT: 1247 state = "account"; 1248 break; 1249 case GFS2_QUOTA_ON: 1250 state = "on"; 1251 break; 1252 default: 1253 state = "unknown"; 1254 break; 1255 } 1256 seq_printf(s, ",quota=%s", state); 1257 } 1258 if (args->ar_suiddir) 1259 seq_printf(s, ",suiddir"); 1260 if (args->ar_data != GFS2_DATA_DEFAULT) { 1261 char *state; 1262 switch (args->ar_data) { 1263 case GFS2_DATA_WRITEBACK: 1264 state = "writeback"; 1265 break; 1266 case GFS2_DATA_ORDERED: 1267 state = "ordered"; 1268 break; 1269 default: 1270 state = "unknown"; 1271 break; 1272 } 1273 seq_printf(s, ",data=%s", state); 1274 } 1275 if (args->ar_discard) 1276 seq_printf(s, ",discard"); 1277 val = sdp->sd_tune.gt_logd_secs; 1278 if (val != 30) 1279 seq_printf(s, ",commit=%d", val); 1280 val = sdp->sd_tune.gt_statfs_quantum; 1281 if (val != 30) 1282 seq_printf(s, ",statfs_quantum=%d", val); 1283 val = sdp->sd_tune.gt_quota_quantum; 1284 if (val != 60) 1285 seq_printf(s, ",quota_quantum=%d", val); 1286 if (args->ar_statfs_percent) 1287 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); 1288 if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1289 const char *state; 1290 1291 switch (args->ar_errors) { 1292 case GFS2_ERRORS_WITHDRAW: 1293 state = "withdraw"; 1294 break; 1295 case GFS2_ERRORS_PANIC: 1296 state = "panic"; 1297 break; 1298 default: 1299 state = "unknown"; 1300 break; 1301 } 1302 seq_printf(s, ",errors=%s", state); 1303 } 1304 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) 1305 seq_printf(s, ",nobarrier"); 1306 if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) 1307 seq_printf(s, ",demote_interface_used"); 1308 return 0; 1309 } 1310 1311 /* 1312 * We have to (at the moment) hold the inodes main lock to cover 1313 * the gap between unlocking the shared lock on the iopen lock and 1314 * taking the exclusive lock. I'd rather do a shared -> exclusive 1315 * conversion on the iopen lock, but we can change that later. This 1316 * is safe, just less efficient. 1317 */ 1318 1319 static void gfs2_evict_inode(struct inode *inode) 1320 { 1321 struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; 1322 struct gfs2_inode *ip = GFS2_I(inode); 1323 struct gfs2_holder gh; 1324 int error; 1325 1326 if (inode->i_nlink) 1327 goto out; 1328 1329 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 1330 if (unlikely(error)) { 1331 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1332 goto out; 1333 } 1334 1335 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 1336 if (error) 1337 goto out_truncate; 1338 1339 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1340 gfs2_glock_dq_wait(&ip->i_iopen_gh); 1341 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); 1342 error = gfs2_glock_nq(&ip->i_iopen_gh); 1343 if (error) 1344 goto out_truncate; 1345 1346 if (S_ISDIR(inode->i_mode) && 1347 (ip->i_diskflags & GFS2_DIF_EXHASH)) { 1348 error = gfs2_dir_exhash_dealloc(ip); 1349 if (error) 1350 goto out_unlock; 1351 } 1352 1353 if (ip->i_eattr) { 1354 error = gfs2_ea_dealloc(ip); 1355 if (error) 1356 goto out_unlock; 1357 } 1358 1359 if (!gfs2_is_stuffed(ip)) { 1360 error = gfs2_file_dealloc(ip); 1361 if (error) 1362 goto out_unlock; 1363 } 1364 1365 error = gfs2_dinode_dealloc(ip); 1366 if (error) 1367 goto out_unlock; 1368 1369 out_truncate: 1370 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 1371 if (error) 1372 goto out_unlock; 1373 /* Needs to be done before glock release & also in a transaction */ 1374 truncate_inode_pages(&inode->i_data, 0); 1375 gfs2_trans_end(sdp); 1376 1377 out_unlock: 1378 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) 1379 gfs2_glock_dq(&ip->i_iopen_gh); 1380 gfs2_holder_uninit(&ip->i_iopen_gh); 1381 gfs2_glock_dq_uninit(&gh); 1382 if (error && error != GLR_TRYFAILED && error != -EROFS) 1383 fs_warn(sdp, "gfs2_evict_inode: %d\n", error); 1384 out: 1385 truncate_inode_pages(&inode->i_data, 0); 1386 end_writeback(inode); 1387 1388 ip->i_gl->gl_object = NULL; 1389 gfs2_glock_put(ip->i_gl); 1390 ip->i_gl = NULL; 1391 if (ip->i_iopen_gh.gh_gl) { 1392 ip->i_iopen_gh.gh_gl->gl_object = NULL; 1393 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1394 } 1395 } 1396 1397 static struct inode *gfs2_alloc_inode(struct super_block *sb) 1398 { 1399 struct gfs2_inode *ip; 1400 1401 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); 1402 if (ip) { 1403 ip->i_flags = 0; 1404 ip->i_gl = NULL; 1405 } 1406 return &ip->i_inode; 1407 } 1408 1409 static void gfs2_i_callback(struct rcu_head *head) 1410 { 1411 struct inode *inode = container_of(head, struct inode, i_rcu); 1412 INIT_LIST_HEAD(&inode->i_dentry); 1413 kmem_cache_free(gfs2_inode_cachep, inode); 1414 } 1415 1416 static void gfs2_destroy_inode(struct inode *inode) 1417 { 1418 call_rcu(&inode->i_rcu, gfs2_i_callback); 1419 } 1420 1421 const struct super_operations gfs2_super_ops = { 1422 .alloc_inode = gfs2_alloc_inode, 1423 .destroy_inode = gfs2_destroy_inode, 1424 .write_inode = gfs2_write_inode, 1425 .evict_inode = gfs2_evict_inode, 1426 .put_super = gfs2_put_super, 1427 .sync_fs = gfs2_sync_fs, 1428 .freeze_fs = gfs2_freeze, 1429 .unfreeze_fs = gfs2_unfreeze, 1430 .statfs = gfs2_statfs, 1431 .remount_fs = gfs2_remount_fs, 1432 .drop_inode = gfs2_drop_inode, 1433 .show_options = gfs2_show_options, 1434 }; 1435 1436