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_ignore_local_fs, "ignore_local_fs"}, 89 {Opt_localflocks, "localflocks"}, 90 {Opt_localcaching, "localcaching"}, 91 {Opt_debug, "debug"}, 92 {Opt_nodebug, "nodebug"}, 93 {Opt_upgrade, "upgrade"}, 94 {Opt_acl, "acl"}, 95 {Opt_noacl, "noacl"}, 96 {Opt_quota_off, "quota=off"}, 97 {Opt_quota_account, "quota=account"}, 98 {Opt_quota_on, "quota=on"}, 99 {Opt_quota, "quota"}, 100 {Opt_noquota, "noquota"}, 101 {Opt_suiddir, "suiddir"}, 102 {Opt_nosuiddir, "nosuiddir"}, 103 {Opt_data_writeback, "data=writeback"}, 104 {Opt_data_ordered, "data=ordered"}, 105 {Opt_meta, "meta"}, 106 {Opt_discard, "discard"}, 107 {Opt_nodiscard, "nodiscard"}, 108 {Opt_commit, "commit=%d"}, 109 {Opt_err_withdraw, "errors=withdraw"}, 110 {Opt_err_panic, "errors=panic"}, 111 {Opt_statfs_quantum, "statfs_quantum=%d"}, 112 {Opt_statfs_percent, "statfs_percent=%d"}, 113 {Opt_quota_quantum, "quota_quantum=%d"}, 114 {Opt_barrier, "barrier"}, 115 {Opt_nobarrier, "nobarrier"}, 116 {Opt_error, NULL} 117 }; 118 119 /** 120 * gfs2_mount_args - Parse mount options 121 * @args: The structure into which the parsed options will be written 122 * @options: The options to parse 123 * 124 * Return: errno 125 */ 126 127 int gfs2_mount_args(struct gfs2_args *args, char *options) 128 { 129 char *o; 130 int token; 131 substring_t tmp[MAX_OPT_ARGS]; 132 int rv; 133 134 /* Split the options into tokens with the "," character and 135 process them */ 136 137 while (1) { 138 o = strsep(&options, ","); 139 if (o == NULL) 140 break; 141 if (*o == '\0') 142 continue; 143 144 token = match_token(o, tokens, tmp); 145 switch (token) { 146 case Opt_lockproto: 147 match_strlcpy(args->ar_lockproto, &tmp[0], 148 GFS2_LOCKNAME_LEN); 149 break; 150 case Opt_locktable: 151 match_strlcpy(args->ar_locktable, &tmp[0], 152 GFS2_LOCKNAME_LEN); 153 break; 154 case Opt_hostdata: 155 match_strlcpy(args->ar_hostdata, &tmp[0], 156 GFS2_LOCKNAME_LEN); 157 break; 158 case Opt_spectator: 159 args->ar_spectator = 1; 160 break; 161 case Opt_ignore_local_fs: 162 args->ar_ignore_local_fs = 1; 163 break; 164 case Opt_localflocks: 165 args->ar_localflocks = 1; 166 break; 167 case Opt_localcaching: 168 args->ar_localcaching = 1; 169 break; 170 case Opt_debug: 171 if (args->ar_errors == GFS2_ERRORS_PANIC) { 172 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 173 "are mutually exclusive.\n"); 174 return -EINVAL; 175 } 176 args->ar_debug = 1; 177 break; 178 case Opt_nodebug: 179 args->ar_debug = 0; 180 break; 181 case Opt_upgrade: 182 args->ar_upgrade = 1; 183 break; 184 case Opt_acl: 185 args->ar_posix_acl = 1; 186 break; 187 case Opt_noacl: 188 args->ar_posix_acl = 0; 189 break; 190 case Opt_quota_off: 191 case Opt_noquota: 192 args->ar_quota = GFS2_QUOTA_OFF; 193 break; 194 case Opt_quota_account: 195 args->ar_quota = GFS2_QUOTA_ACCOUNT; 196 break; 197 case Opt_quota_on: 198 case Opt_quota: 199 args->ar_quota = GFS2_QUOTA_ON; 200 break; 201 case Opt_suiddir: 202 args->ar_suiddir = 1; 203 break; 204 case Opt_nosuiddir: 205 args->ar_suiddir = 0; 206 break; 207 case Opt_data_writeback: 208 args->ar_data = GFS2_DATA_WRITEBACK; 209 break; 210 case Opt_data_ordered: 211 args->ar_data = GFS2_DATA_ORDERED; 212 break; 213 case Opt_meta: 214 args->ar_meta = 1; 215 break; 216 case Opt_discard: 217 args->ar_discard = 1; 218 break; 219 case Opt_nodiscard: 220 args->ar_discard = 0; 221 break; 222 case Opt_commit: 223 rv = match_int(&tmp[0], &args->ar_commit); 224 if (rv || args->ar_commit <= 0) { 225 printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n"); 226 return rv ? rv : -EINVAL; 227 } 228 break; 229 case Opt_statfs_quantum: 230 rv = match_int(&tmp[0], &args->ar_statfs_quantum); 231 if (rv || args->ar_statfs_quantum < 0) { 232 printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n"); 233 return rv ? rv : -EINVAL; 234 } 235 break; 236 case Opt_quota_quantum: 237 rv = match_int(&tmp[0], &args->ar_quota_quantum); 238 if (rv || args->ar_quota_quantum <= 0) { 239 printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n"); 240 return rv ? rv : -EINVAL; 241 } 242 break; 243 case Opt_statfs_percent: 244 rv = match_int(&tmp[0], &args->ar_statfs_percent); 245 if (rv || args->ar_statfs_percent < 0 || 246 args->ar_statfs_percent > 100) { 247 printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n"); 248 return rv ? rv : -EINVAL; 249 } 250 break; 251 case Opt_err_withdraw: 252 args->ar_errors = GFS2_ERRORS_WITHDRAW; 253 break; 254 case Opt_err_panic: 255 if (args->ar_debug) { 256 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 257 "are mutually exclusive.\n"); 258 return -EINVAL; 259 } 260 args->ar_errors = GFS2_ERRORS_PANIC; 261 break; 262 case Opt_barrier: 263 args->ar_nobarrier = 0; 264 break; 265 case Opt_nobarrier: 266 args->ar_nobarrier = 1; 267 break; 268 case Opt_error: 269 default: 270 printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o); 271 return -EINVAL; 272 } 273 } 274 275 return 0; 276 } 277 278 /** 279 * gfs2_jindex_free - Clear all the journal index information 280 * @sdp: The GFS2 superblock 281 * 282 */ 283 284 void gfs2_jindex_free(struct gfs2_sbd *sdp) 285 { 286 struct list_head list, *head; 287 struct gfs2_jdesc *jd; 288 struct gfs2_journal_extent *jext; 289 290 spin_lock(&sdp->sd_jindex_spin); 291 list_add(&list, &sdp->sd_jindex_list); 292 list_del_init(&sdp->sd_jindex_list); 293 sdp->sd_journals = 0; 294 spin_unlock(&sdp->sd_jindex_spin); 295 296 while (!list_empty(&list)) { 297 jd = list_entry(list.next, struct gfs2_jdesc, jd_list); 298 head = &jd->extent_list; 299 while (!list_empty(head)) { 300 jext = list_entry(head->next, 301 struct gfs2_journal_extent, 302 extent_list); 303 list_del(&jext->extent_list); 304 kfree(jext); 305 } 306 list_del(&jd->jd_list); 307 iput(jd->jd_inode); 308 kfree(jd); 309 } 310 } 311 312 static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) 313 { 314 struct gfs2_jdesc *jd; 315 int found = 0; 316 317 list_for_each_entry(jd, head, jd_list) { 318 if (jd->jd_jid == jid) { 319 found = 1; 320 break; 321 } 322 } 323 324 if (!found) 325 jd = NULL; 326 327 return jd; 328 } 329 330 struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) 331 { 332 struct gfs2_jdesc *jd; 333 334 spin_lock(&sdp->sd_jindex_spin); 335 jd = jdesc_find_i(&sdp->sd_jindex_list, jid); 336 spin_unlock(&sdp->sd_jindex_spin); 337 338 return jd; 339 } 340 341 int gfs2_jdesc_check(struct gfs2_jdesc *jd) 342 { 343 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 344 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 345 346 if (ip->i_disksize < (8 << 20) || ip->i_disksize > (1 << 30) || 347 (ip->i_disksize & (sdp->sd_sb.sb_bsize - 1))) { 348 gfs2_consist_inode(ip); 349 return -EIO; 350 } 351 jd->jd_blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; 352 353 if (gfs2_write_alloc_required(ip, 0, ip->i_disksize)) { 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 invalidate_inodes(sdp->sd_vfs); 861 gfs2_gl_hash_clear(sdp); 862 /* Unmount the locking protocol */ 863 gfs2_lm_unmount(sdp); 864 865 /* At this point, we're through participating in the lockspace */ 866 gfs2_sys_fs_del(sdp); 867 } 868 869 /** 870 * gfs2_sync_fs - sync the filesystem 871 * @sb: the superblock 872 * 873 * Flushes the log to disk. 874 */ 875 876 static int gfs2_sync_fs(struct super_block *sb, int wait) 877 { 878 if (wait && sb->s_fs_info) 879 gfs2_log_flush(sb->s_fs_info, NULL); 880 return 0; 881 } 882 883 /** 884 * gfs2_freeze - prevent further writes to the filesystem 885 * @sb: the VFS structure for the filesystem 886 * 887 */ 888 889 static int gfs2_freeze(struct super_block *sb) 890 { 891 struct gfs2_sbd *sdp = sb->s_fs_info; 892 int error; 893 894 if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 895 return -EINVAL; 896 897 for (;;) { 898 error = gfs2_freeze_fs(sdp); 899 if (!error) 900 break; 901 902 switch (error) { 903 case -EBUSY: 904 fs_err(sdp, "waiting for recovery before freeze\n"); 905 break; 906 907 default: 908 fs_err(sdp, "error freezing FS: %d\n", error); 909 break; 910 } 911 912 fs_err(sdp, "retrying...\n"); 913 msleep(1000); 914 } 915 return 0; 916 } 917 918 /** 919 * gfs2_unfreeze - reallow writes to the filesystem 920 * @sb: the VFS structure for the filesystem 921 * 922 */ 923 924 static int gfs2_unfreeze(struct super_block *sb) 925 { 926 gfs2_unfreeze_fs(sb->s_fs_info); 927 return 0; 928 } 929 930 /** 931 * statfs_fill - fill in the sg for a given RG 932 * @rgd: the RG 933 * @sc: the sc structure 934 * 935 * Returns: 0 on success, -ESTALE if the LVB is invalid 936 */ 937 938 static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 939 struct gfs2_statfs_change_host *sc) 940 { 941 gfs2_rgrp_verify(rgd); 942 sc->sc_total += rgd->rd_data; 943 sc->sc_free += rgd->rd_free; 944 sc->sc_dinodes += rgd->rd_dinodes; 945 return 0; 946 } 947 948 /** 949 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 950 * @sdp: the filesystem 951 * @sc: the sc info that will be returned 952 * 953 * Any error (other than a signal) will cause this routine to fall back 954 * to the synchronous version. 955 * 956 * FIXME: This really shouldn't busy wait like this. 957 * 958 * Returns: errno 959 */ 960 961 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 962 { 963 struct gfs2_holder ri_gh; 964 struct gfs2_rgrpd *rgd_next; 965 struct gfs2_holder *gha, *gh; 966 unsigned int slots = 64; 967 unsigned int x; 968 int done; 969 int error = 0, err; 970 971 memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 972 gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 973 if (!gha) 974 return -ENOMEM; 975 976 error = gfs2_rindex_hold(sdp, &ri_gh); 977 if (error) 978 goto out; 979 980 rgd_next = gfs2_rgrpd_get_first(sdp); 981 982 for (;;) { 983 done = 1; 984 985 for (x = 0; x < slots; x++) { 986 gh = gha + x; 987 988 if (gh->gh_gl && gfs2_glock_poll(gh)) { 989 err = gfs2_glock_wait(gh); 990 if (err) { 991 gfs2_holder_uninit(gh); 992 error = err; 993 } else { 994 if (!error) 995 error = statfs_slow_fill( 996 gh->gh_gl->gl_object, sc); 997 gfs2_glock_dq_uninit(gh); 998 } 999 } 1000 1001 if (gh->gh_gl) 1002 done = 0; 1003 else if (rgd_next && !error) { 1004 error = gfs2_glock_nq_init(rgd_next->rd_gl, 1005 LM_ST_SHARED, 1006 GL_ASYNC, 1007 gh); 1008 rgd_next = gfs2_rgrpd_get_next(rgd_next); 1009 done = 0; 1010 } 1011 1012 if (signal_pending(current)) 1013 error = -ERESTARTSYS; 1014 } 1015 1016 if (done) 1017 break; 1018 1019 yield(); 1020 } 1021 1022 gfs2_glock_dq_uninit(&ri_gh); 1023 1024 out: 1025 kfree(gha); 1026 return error; 1027 } 1028 1029 /** 1030 * gfs2_statfs_i - Do a statfs 1031 * @sdp: the filesystem 1032 * @sg: the sg structure 1033 * 1034 * Returns: errno 1035 */ 1036 1037 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 1038 { 1039 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 1040 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 1041 1042 spin_lock(&sdp->sd_statfs_spin); 1043 1044 *sc = *m_sc; 1045 sc->sc_total += l_sc->sc_total; 1046 sc->sc_free += l_sc->sc_free; 1047 sc->sc_dinodes += l_sc->sc_dinodes; 1048 1049 spin_unlock(&sdp->sd_statfs_spin); 1050 1051 if (sc->sc_free < 0) 1052 sc->sc_free = 0; 1053 if (sc->sc_free > sc->sc_total) 1054 sc->sc_free = sc->sc_total; 1055 if (sc->sc_dinodes < 0) 1056 sc->sc_dinodes = 0; 1057 1058 return 0; 1059 } 1060 1061 /** 1062 * gfs2_statfs - Gather and return stats about the filesystem 1063 * @sb: The superblock 1064 * @statfsbuf: The buffer 1065 * 1066 * Returns: 0 on success or error code 1067 */ 1068 1069 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1070 { 1071 struct super_block *sb = dentry->d_inode->i_sb; 1072 struct gfs2_sbd *sdp = sb->s_fs_info; 1073 struct gfs2_statfs_change_host sc; 1074 int error; 1075 1076 if (gfs2_tune_get(sdp, gt_statfs_slow)) 1077 error = gfs2_statfs_slow(sdp, &sc); 1078 else 1079 error = gfs2_statfs_i(sdp, &sc); 1080 1081 if (error) 1082 return error; 1083 1084 buf->f_type = GFS2_MAGIC; 1085 buf->f_bsize = sdp->sd_sb.sb_bsize; 1086 buf->f_blocks = sc.sc_total; 1087 buf->f_bfree = sc.sc_free; 1088 buf->f_bavail = sc.sc_free; 1089 buf->f_files = sc.sc_dinodes + sc.sc_free; 1090 buf->f_ffree = sc.sc_free; 1091 buf->f_namelen = GFS2_FNAMESIZE; 1092 1093 return 0; 1094 } 1095 1096 /** 1097 * gfs2_remount_fs - called when the FS is remounted 1098 * @sb: the filesystem 1099 * @flags: the remount flags 1100 * @data: extra data passed in (not used right now) 1101 * 1102 * Returns: errno 1103 */ 1104 1105 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) 1106 { 1107 struct gfs2_sbd *sdp = sb->s_fs_info; 1108 struct gfs2_args args = sdp->sd_args; /* Default to current settings */ 1109 struct gfs2_tune *gt = &sdp->sd_tune; 1110 int error; 1111 1112 spin_lock(>->gt_spin); 1113 args.ar_commit = gt->gt_logd_secs; 1114 args.ar_quota_quantum = gt->gt_quota_quantum; 1115 if (gt->gt_statfs_slow) 1116 args.ar_statfs_quantum = 0; 1117 else 1118 args.ar_statfs_quantum = gt->gt_statfs_quantum; 1119 spin_unlock(>->gt_spin); 1120 error = gfs2_mount_args(&args, data); 1121 if (error) 1122 return error; 1123 1124 /* Not allowed to change locking details */ 1125 if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || 1126 strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || 1127 strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) 1128 return -EINVAL; 1129 1130 /* Some flags must not be changed */ 1131 if (args_neq(&args, &sdp->sd_args, spectator) || 1132 args_neq(&args, &sdp->sd_args, ignore_local_fs) || 1133 args_neq(&args, &sdp->sd_args, localflocks) || 1134 args_neq(&args, &sdp->sd_args, localcaching) || 1135 args_neq(&args, &sdp->sd_args, meta)) 1136 return -EINVAL; 1137 1138 if (sdp->sd_args.ar_spectator) 1139 *flags |= MS_RDONLY; 1140 1141 if ((sb->s_flags ^ *flags) & MS_RDONLY) { 1142 if (*flags & MS_RDONLY) 1143 error = gfs2_make_fs_ro(sdp); 1144 else 1145 error = gfs2_make_fs_rw(sdp); 1146 if (error) 1147 return error; 1148 } 1149 1150 sdp->sd_args = args; 1151 if (sdp->sd_args.ar_posix_acl) 1152 sb->s_flags |= MS_POSIXACL; 1153 else 1154 sb->s_flags &= ~MS_POSIXACL; 1155 if (sdp->sd_args.ar_nobarrier) 1156 set_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1157 else 1158 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1159 spin_lock(>->gt_spin); 1160 gt->gt_logd_secs = args.ar_commit; 1161 gt->gt_quota_quantum = args.ar_quota_quantum; 1162 if (args.ar_statfs_quantum) { 1163 gt->gt_statfs_slow = 0; 1164 gt->gt_statfs_quantum = args.ar_statfs_quantum; 1165 } 1166 else { 1167 gt->gt_statfs_slow = 1; 1168 gt->gt_statfs_quantum = 30; 1169 } 1170 spin_unlock(>->gt_spin); 1171 1172 gfs2_online_uevent(sdp); 1173 return 0; 1174 } 1175 1176 /** 1177 * gfs2_drop_inode - Drop an inode (test for remote unlink) 1178 * @inode: The inode to drop 1179 * 1180 * If we've received a callback on an iopen lock then its because a 1181 * remote node tried to deallocate the inode but failed due to this node 1182 * still having the inode open. Here we mark the link count zero 1183 * since we know that it must have reached zero if the GLF_DEMOTE flag 1184 * is set on the iopen glock. If we didn't do a disk read since the 1185 * remote node removed the final link then we might otherwise miss 1186 * this event. This check ensures that this node will deallocate the 1187 * inode's blocks, or alternatively pass the baton on to another 1188 * node for later deallocation. 1189 */ 1190 1191 static int gfs2_drop_inode(struct inode *inode) 1192 { 1193 struct gfs2_inode *ip = GFS2_I(inode); 1194 1195 if (inode->i_nlink) { 1196 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1197 if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) 1198 clear_nlink(inode); 1199 } 1200 return generic_drop_inode(inode); 1201 } 1202 1203 static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 1204 { 1205 do { 1206 if (d1 == d2) 1207 return 1; 1208 d1 = d1->d_parent; 1209 } while (!IS_ROOT(d1)); 1210 return 0; 1211 } 1212 1213 /** 1214 * gfs2_show_options - Show mount options for /proc/mounts 1215 * @s: seq_file structure 1216 * @mnt: vfsmount 1217 * 1218 * Returns: 0 on success or error code 1219 */ 1220 1221 static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1222 { 1223 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; 1224 struct gfs2_args *args = &sdp->sd_args; 1225 int val; 1226 1227 if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) 1228 seq_printf(s, ",meta"); 1229 if (args->ar_lockproto[0]) 1230 seq_printf(s, ",lockproto=%s", args->ar_lockproto); 1231 if (args->ar_locktable[0]) 1232 seq_printf(s, ",locktable=%s", args->ar_locktable); 1233 if (args->ar_hostdata[0]) 1234 seq_printf(s, ",hostdata=%s", args->ar_hostdata); 1235 if (args->ar_spectator) 1236 seq_printf(s, ",spectator"); 1237 if (args->ar_ignore_local_fs) 1238 seq_printf(s, ",ignore_local_fs"); 1239 if (args->ar_localflocks) 1240 seq_printf(s, ",localflocks"); 1241 if (args->ar_localcaching) 1242 seq_printf(s, ",localcaching"); 1243 if (args->ar_debug) 1244 seq_printf(s, ",debug"); 1245 if (args->ar_upgrade) 1246 seq_printf(s, ",upgrade"); 1247 if (args->ar_posix_acl) 1248 seq_printf(s, ",acl"); 1249 if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 1250 char *state; 1251 switch (args->ar_quota) { 1252 case GFS2_QUOTA_OFF: 1253 state = "off"; 1254 break; 1255 case GFS2_QUOTA_ACCOUNT: 1256 state = "account"; 1257 break; 1258 case GFS2_QUOTA_ON: 1259 state = "on"; 1260 break; 1261 default: 1262 state = "unknown"; 1263 break; 1264 } 1265 seq_printf(s, ",quota=%s", state); 1266 } 1267 if (args->ar_suiddir) 1268 seq_printf(s, ",suiddir"); 1269 if (args->ar_data != GFS2_DATA_DEFAULT) { 1270 char *state; 1271 switch (args->ar_data) { 1272 case GFS2_DATA_WRITEBACK: 1273 state = "writeback"; 1274 break; 1275 case GFS2_DATA_ORDERED: 1276 state = "ordered"; 1277 break; 1278 default: 1279 state = "unknown"; 1280 break; 1281 } 1282 seq_printf(s, ",data=%s", state); 1283 } 1284 if (args->ar_discard) 1285 seq_printf(s, ",discard"); 1286 val = sdp->sd_tune.gt_logd_secs; 1287 if (val != 30) 1288 seq_printf(s, ",commit=%d", val); 1289 val = sdp->sd_tune.gt_statfs_quantum; 1290 if (val != 30) 1291 seq_printf(s, ",statfs_quantum=%d", val); 1292 val = sdp->sd_tune.gt_quota_quantum; 1293 if (val != 60) 1294 seq_printf(s, ",quota_quantum=%d", val); 1295 if (args->ar_statfs_percent) 1296 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); 1297 if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1298 const char *state; 1299 1300 switch (args->ar_errors) { 1301 case GFS2_ERRORS_WITHDRAW: 1302 state = "withdraw"; 1303 break; 1304 case GFS2_ERRORS_PANIC: 1305 state = "panic"; 1306 break; 1307 default: 1308 state = "unknown"; 1309 break; 1310 } 1311 seq_printf(s, ",errors=%s", state); 1312 } 1313 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) 1314 seq_printf(s, ",nobarrier"); 1315 if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) 1316 seq_printf(s, ",demote_interface_used"); 1317 return 0; 1318 } 1319 1320 /* 1321 * We have to (at the moment) hold the inodes main lock to cover 1322 * the gap between unlocking the shared lock on the iopen lock and 1323 * taking the exclusive lock. I'd rather do a shared -> exclusive 1324 * conversion on the iopen lock, but we can change that later. This 1325 * is safe, just less efficient. 1326 */ 1327 1328 static void gfs2_evict_inode(struct inode *inode) 1329 { 1330 struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; 1331 struct gfs2_inode *ip = GFS2_I(inode); 1332 struct gfs2_holder gh; 1333 int error; 1334 1335 if (inode->i_nlink) 1336 goto out; 1337 1338 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 1339 if (unlikely(error)) { 1340 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1341 goto out; 1342 } 1343 1344 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 1345 if (error) 1346 goto out_truncate; 1347 1348 gfs2_glock_dq_wait(&ip->i_iopen_gh); 1349 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); 1350 error = gfs2_glock_nq(&ip->i_iopen_gh); 1351 if (error) 1352 goto out_truncate; 1353 1354 if (S_ISDIR(inode->i_mode) && 1355 (ip->i_diskflags & GFS2_DIF_EXHASH)) { 1356 error = gfs2_dir_exhash_dealloc(ip); 1357 if (error) 1358 goto out_unlock; 1359 } 1360 1361 if (ip->i_eattr) { 1362 error = gfs2_ea_dealloc(ip); 1363 if (error) 1364 goto out_unlock; 1365 } 1366 1367 if (!gfs2_is_stuffed(ip)) { 1368 error = gfs2_file_dealloc(ip); 1369 if (error) 1370 goto out_unlock; 1371 } 1372 1373 error = gfs2_dinode_dealloc(ip); 1374 if (error) 1375 goto out_unlock; 1376 1377 out_truncate: 1378 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 1379 if (error) 1380 goto out_unlock; 1381 /* Needs to be done before glock release & also in a transaction */ 1382 truncate_inode_pages(&inode->i_data, 0); 1383 gfs2_trans_end(sdp); 1384 1385 out_unlock: 1386 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) 1387 gfs2_glock_dq(&ip->i_iopen_gh); 1388 gfs2_holder_uninit(&ip->i_iopen_gh); 1389 gfs2_glock_dq_uninit(&gh); 1390 if (error && error != GLR_TRYFAILED && error != -EROFS) 1391 fs_warn(sdp, "gfs2_evict_inode: %d\n", error); 1392 out: 1393 truncate_inode_pages(&inode->i_data, 0); 1394 end_writeback(inode); 1395 1396 ip->i_gl->gl_object = NULL; 1397 gfs2_glock_put(ip->i_gl); 1398 ip->i_gl = NULL; 1399 if (ip->i_iopen_gh.gh_gl) { 1400 ip->i_iopen_gh.gh_gl->gl_object = NULL; 1401 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1402 } 1403 } 1404 1405 static struct inode *gfs2_alloc_inode(struct super_block *sb) 1406 { 1407 struct gfs2_inode *ip; 1408 1409 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); 1410 if (ip) { 1411 ip->i_flags = 0; 1412 ip->i_gl = NULL; 1413 } 1414 return &ip->i_inode; 1415 } 1416 1417 static void gfs2_destroy_inode(struct inode *inode) 1418 { 1419 kmem_cache_free(gfs2_inode_cachep, inode); 1420 } 1421 1422 const struct super_operations gfs2_super_ops = { 1423 .alloc_inode = gfs2_alloc_inode, 1424 .destroy_inode = gfs2_destroy_inode, 1425 .write_inode = gfs2_write_inode, 1426 .evict_inode = gfs2_evict_inode, 1427 .put_super = gfs2_put_super, 1428 .sync_fs = gfs2_sync_fs, 1429 .freeze_fs = gfs2_freeze, 1430 .unfreeze_fs = gfs2_unfreeze, 1431 .statfs = gfs2_statfs, 1432 .remount_fs = gfs2_remount_fs, 1433 .drop_inode = gfs2_drop_inode, 1434 .show_options = gfs2_show_options, 1435 }; 1436 1437