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 int ar; 346 int error; 347 348 if (ip->i_disksize < (8 << 20) || ip->i_disksize > (1 << 30) || 349 (ip->i_disksize & (sdp->sd_sb.sb_bsize - 1))) { 350 gfs2_consist_inode(ip); 351 return -EIO; 352 } 353 jd->jd_blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; 354 355 error = gfs2_write_alloc_required(ip, 0, ip->i_disksize, &ar); 356 if (!error && ar) { 357 gfs2_consist_inode(ip); 358 error = -EIO; 359 } 360 361 return error; 362 } 363 364 /** 365 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one 366 * @sdp: the filesystem 367 * 368 * Returns: errno 369 */ 370 371 int gfs2_make_fs_rw(struct gfs2_sbd *sdp) 372 { 373 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); 374 struct gfs2_glock *j_gl = ip->i_gl; 375 struct gfs2_holder t_gh; 376 struct gfs2_log_header_host head; 377 int error; 378 379 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); 380 if (error) 381 return error; 382 383 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); 384 385 error = gfs2_find_jhead(sdp->sd_jdesc, &head); 386 if (error) 387 goto fail; 388 389 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 390 gfs2_consist(sdp); 391 error = -EIO; 392 goto fail; 393 } 394 395 /* Initialize some head of the log stuff */ 396 sdp->sd_log_sequence = head.lh_sequence + 1; 397 gfs2_log_pointers_init(sdp, head.lh_blkno); 398 399 error = gfs2_quota_init(sdp); 400 if (error) 401 goto fail; 402 403 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 404 405 gfs2_glock_dq_uninit(&t_gh); 406 407 return 0; 408 409 fail: 410 t_gh.gh_flags |= GL_NOCACHE; 411 gfs2_glock_dq_uninit(&t_gh); 412 413 return error; 414 } 415 416 void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) 417 { 418 const struct gfs2_statfs_change *str = buf; 419 420 sc->sc_total = be64_to_cpu(str->sc_total); 421 sc->sc_free = be64_to_cpu(str->sc_free); 422 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); 423 } 424 425 static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) 426 { 427 struct gfs2_statfs_change *str = buf; 428 429 str->sc_total = cpu_to_be64(sc->sc_total); 430 str->sc_free = cpu_to_be64(sc->sc_free); 431 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); 432 } 433 434 int gfs2_statfs_init(struct gfs2_sbd *sdp) 435 { 436 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 437 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 438 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 439 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 440 struct buffer_head *m_bh, *l_bh; 441 struct gfs2_holder gh; 442 int error; 443 444 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 445 &gh); 446 if (error) 447 return error; 448 449 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 450 if (error) 451 goto out; 452 453 if (sdp->sd_args.ar_spectator) { 454 spin_lock(&sdp->sd_statfs_spin); 455 gfs2_statfs_change_in(m_sc, m_bh->b_data + 456 sizeof(struct gfs2_dinode)); 457 spin_unlock(&sdp->sd_statfs_spin); 458 } else { 459 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 460 if (error) 461 goto out_m_bh; 462 463 spin_lock(&sdp->sd_statfs_spin); 464 gfs2_statfs_change_in(m_sc, m_bh->b_data + 465 sizeof(struct gfs2_dinode)); 466 gfs2_statfs_change_in(l_sc, l_bh->b_data + 467 sizeof(struct gfs2_dinode)); 468 spin_unlock(&sdp->sd_statfs_spin); 469 470 brelse(l_bh); 471 } 472 473 out_m_bh: 474 brelse(m_bh); 475 out: 476 gfs2_glock_dq_uninit(&gh); 477 return 0; 478 } 479 480 void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, 481 s64 dinodes) 482 { 483 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 484 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 485 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 486 struct buffer_head *l_bh; 487 s64 x, y; 488 int need_sync = 0; 489 int error; 490 491 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 492 if (error) 493 return; 494 495 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 496 497 spin_lock(&sdp->sd_statfs_spin); 498 l_sc->sc_total += total; 499 l_sc->sc_free += free; 500 l_sc->sc_dinodes += dinodes; 501 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); 502 if (sdp->sd_args.ar_statfs_percent) { 503 x = 100 * l_sc->sc_free; 504 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; 505 if (x >= y || x <= -y) 506 need_sync = 1; 507 } 508 spin_unlock(&sdp->sd_statfs_spin); 509 510 brelse(l_bh); 511 if (need_sync) 512 gfs2_wake_up_statfs(sdp); 513 } 514 515 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, 516 struct buffer_head *l_bh) 517 { 518 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 519 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 520 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 521 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 522 523 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 524 525 spin_lock(&sdp->sd_statfs_spin); 526 m_sc->sc_total += l_sc->sc_total; 527 m_sc->sc_free += l_sc->sc_free; 528 m_sc->sc_dinodes += l_sc->sc_dinodes; 529 memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); 530 memset(l_bh->b_data + sizeof(struct gfs2_dinode), 531 0, sizeof(struct gfs2_statfs_change)); 532 spin_unlock(&sdp->sd_statfs_spin); 533 534 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); 535 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); 536 } 537 538 int gfs2_statfs_sync(struct super_block *sb, int type) 539 { 540 struct gfs2_sbd *sdp = sb->s_fs_info; 541 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 542 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 543 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 544 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 545 struct gfs2_holder gh; 546 struct buffer_head *m_bh, *l_bh; 547 int error; 548 549 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 550 &gh); 551 if (error) 552 return error; 553 554 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 555 if (error) 556 goto out; 557 558 spin_lock(&sdp->sd_statfs_spin); 559 gfs2_statfs_change_in(m_sc, m_bh->b_data + 560 sizeof(struct gfs2_dinode)); 561 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { 562 spin_unlock(&sdp->sd_statfs_spin); 563 goto out_bh; 564 } 565 spin_unlock(&sdp->sd_statfs_spin); 566 567 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 568 if (error) 569 goto out_bh; 570 571 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); 572 if (error) 573 goto out_bh2; 574 575 update_statfs(sdp, m_bh, l_bh); 576 sdp->sd_statfs_force_sync = 0; 577 578 gfs2_trans_end(sdp); 579 580 out_bh2: 581 brelse(l_bh); 582 out_bh: 583 brelse(m_bh); 584 out: 585 gfs2_glock_dq_uninit(&gh); 586 return error; 587 } 588 589 struct lfcc { 590 struct list_head list; 591 struct gfs2_holder gh; 592 }; 593 594 /** 595 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all 596 * journals are clean 597 * @sdp: the file system 598 * @state: the state to put the transaction lock into 599 * @t_gh: the hold on the transaction lock 600 * 601 * Returns: errno 602 */ 603 604 static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, 605 struct gfs2_holder *t_gh) 606 { 607 struct gfs2_inode *ip; 608 struct gfs2_jdesc *jd; 609 struct lfcc *lfcc; 610 LIST_HEAD(list); 611 struct gfs2_log_header_host lh; 612 int error; 613 614 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 615 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); 616 if (!lfcc) { 617 error = -ENOMEM; 618 goto out; 619 } 620 ip = GFS2_I(jd->jd_inode); 621 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); 622 if (error) { 623 kfree(lfcc); 624 goto out; 625 } 626 list_add(&lfcc->list, &list); 627 } 628 629 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, 630 GL_NOCACHE, t_gh); 631 632 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 633 error = gfs2_jdesc_check(jd); 634 if (error) 635 break; 636 error = gfs2_find_jhead(jd, &lh); 637 if (error) 638 break; 639 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 640 error = -EBUSY; 641 break; 642 } 643 } 644 645 if (error) 646 gfs2_glock_dq_uninit(t_gh); 647 648 out: 649 while (!list_empty(&list)) { 650 lfcc = list_entry(list.next, struct lfcc, list); 651 list_del(&lfcc->list); 652 gfs2_glock_dq_uninit(&lfcc->gh); 653 kfree(lfcc); 654 } 655 return error; 656 } 657 658 /** 659 * gfs2_freeze_fs - freezes the file system 660 * @sdp: the file system 661 * 662 * This function flushes data and meta data for all machines by 663 * aquiring the transaction log exclusively. All journals are 664 * ensured to be in a clean state as well. 665 * 666 * Returns: errno 667 */ 668 669 int gfs2_freeze_fs(struct gfs2_sbd *sdp) 670 { 671 int error = 0; 672 673 mutex_lock(&sdp->sd_freeze_lock); 674 675 if (!sdp->sd_freeze_count++) { 676 error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); 677 if (error) 678 sdp->sd_freeze_count--; 679 } 680 681 mutex_unlock(&sdp->sd_freeze_lock); 682 683 return error; 684 } 685 686 /** 687 * gfs2_unfreeze_fs - unfreezes the file system 688 * @sdp: the file system 689 * 690 * This function allows the file system to proceed by unlocking 691 * the exclusively held transaction lock. Other GFS2 nodes are 692 * now free to acquire the lock shared and go on with their lives. 693 * 694 */ 695 696 void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) 697 { 698 mutex_lock(&sdp->sd_freeze_lock); 699 700 if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) 701 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 702 703 mutex_unlock(&sdp->sd_freeze_lock); 704 } 705 706 707 /** 708 * gfs2_write_inode - Make sure the inode is stable on the disk 709 * @inode: The inode 710 * @sync: synchronous write flag 711 * 712 * Returns: errno 713 */ 714 715 static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) 716 { 717 struct gfs2_inode *ip = GFS2_I(inode); 718 struct gfs2_sbd *sdp = GFS2_SB(inode); 719 struct gfs2_holder gh; 720 struct buffer_head *bh; 721 struct timespec atime; 722 struct gfs2_dinode *di; 723 int ret = 0; 724 725 /* Check this is a "normal" inode, etc */ 726 if (current->flags & PF_MEMALLOC) 727 return 0; 728 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 729 if (ret) 730 goto do_flush; 731 ret = gfs2_trans_begin(sdp, RES_DINODE, 0); 732 if (ret) 733 goto do_unlock; 734 ret = gfs2_meta_inode_buffer(ip, &bh); 735 if (ret == 0) { 736 di = (struct gfs2_dinode *)bh->b_data; 737 atime.tv_sec = be64_to_cpu(di->di_atime); 738 atime.tv_nsec = be32_to_cpu(di->di_atime_nsec); 739 if (timespec_compare(&inode->i_atime, &atime) > 0) { 740 gfs2_trans_add_bh(ip->i_gl, bh, 1); 741 gfs2_dinode_out(ip, bh->b_data); 742 } 743 brelse(bh); 744 } 745 gfs2_trans_end(sdp); 746 do_unlock: 747 gfs2_glock_dq_uninit(&gh); 748 do_flush: 749 if (wbc->sync_mode == WB_SYNC_ALL) 750 gfs2_log_flush(GFS2_SB(inode), ip->i_gl); 751 return ret; 752 } 753 754 /** 755 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one 756 * @sdp: the filesystem 757 * 758 * Returns: errno 759 */ 760 761 static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) 762 { 763 struct gfs2_holder t_gh; 764 int error; 765 766 flush_workqueue(gfs2_delete_workqueue); 767 gfs2_quota_sync(sdp->sd_vfs, 0, 1); 768 gfs2_statfs_sync(sdp->sd_vfs, 0); 769 770 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, 771 &t_gh); 772 if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 773 return error; 774 775 gfs2_meta_syncfs(sdp); 776 gfs2_log_shutdown(sdp); 777 778 clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 779 780 if (t_gh.gh_gl) 781 gfs2_glock_dq_uninit(&t_gh); 782 783 gfs2_quota_cleanup(sdp); 784 785 return error; 786 } 787 788 static int gfs2_umount_recovery_wait(void *word) 789 { 790 schedule(); 791 return 0; 792 } 793 794 /** 795 * gfs2_put_super - Unmount the filesystem 796 * @sb: The VFS superblock 797 * 798 */ 799 800 static void gfs2_put_super(struct super_block *sb) 801 { 802 struct gfs2_sbd *sdp = sb->s_fs_info; 803 int error; 804 struct gfs2_jdesc *jd; 805 806 /* Unfreeze the filesystem, if we need to */ 807 808 mutex_lock(&sdp->sd_freeze_lock); 809 if (sdp->sd_freeze_count) 810 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 811 mutex_unlock(&sdp->sd_freeze_lock); 812 813 /* No more recovery requests */ 814 set_bit(SDF_NORECOVERY, &sdp->sd_flags); 815 smp_mb(); 816 817 /* Wait on outstanding recovery */ 818 restart: 819 spin_lock(&sdp->sd_jindex_spin); 820 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 821 if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) 822 continue; 823 spin_unlock(&sdp->sd_jindex_spin); 824 wait_on_bit(&jd->jd_flags, JDF_RECOVERY, 825 gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE); 826 goto restart; 827 } 828 spin_unlock(&sdp->sd_jindex_spin); 829 830 kthread_stop(sdp->sd_quotad_process); 831 kthread_stop(sdp->sd_logd_process); 832 833 if (!(sb->s_flags & MS_RDONLY)) { 834 error = gfs2_make_fs_ro(sdp); 835 if (error) 836 gfs2_io_error(sdp); 837 } 838 /* At this point, we're through modifying the disk */ 839 840 /* Release stuff */ 841 842 iput(sdp->sd_jindex); 843 iput(sdp->sd_statfs_inode); 844 iput(sdp->sd_rindex); 845 iput(sdp->sd_quota_inode); 846 847 gfs2_glock_put(sdp->sd_rename_gl); 848 gfs2_glock_put(sdp->sd_trans_gl); 849 850 if (!sdp->sd_args.ar_spectator) { 851 gfs2_glock_dq_uninit(&sdp->sd_journal_gh); 852 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); 853 gfs2_glock_dq_uninit(&sdp->sd_sc_gh); 854 gfs2_glock_dq_uninit(&sdp->sd_qc_gh); 855 iput(sdp->sd_sc_inode); 856 iput(sdp->sd_qc_inode); 857 } 858 859 gfs2_glock_dq_uninit(&sdp->sd_live_gh); 860 gfs2_clear_rgrpd(sdp); 861 gfs2_jindex_free(sdp); 862 /* Take apart glock structures and buffer lists */ 863 invalidate_inodes(sdp->sd_vfs); 864 gfs2_gl_hash_clear(sdp); 865 /* Unmount the locking protocol */ 866 gfs2_lm_unmount(sdp); 867 868 /* At this point, we're through participating in the lockspace */ 869 gfs2_sys_fs_del(sdp); 870 } 871 872 /** 873 * gfs2_sync_fs - sync the filesystem 874 * @sb: the superblock 875 * 876 * Flushes the log to disk. 877 */ 878 879 static int gfs2_sync_fs(struct super_block *sb, int wait) 880 { 881 if (wait && sb->s_fs_info) 882 gfs2_log_flush(sb->s_fs_info, NULL); 883 return 0; 884 } 885 886 /** 887 * gfs2_freeze - prevent further writes to the filesystem 888 * @sb: the VFS structure for the filesystem 889 * 890 */ 891 892 static int gfs2_freeze(struct super_block *sb) 893 { 894 struct gfs2_sbd *sdp = sb->s_fs_info; 895 int error; 896 897 if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 898 return -EINVAL; 899 900 for (;;) { 901 error = gfs2_freeze_fs(sdp); 902 if (!error) 903 break; 904 905 switch (error) { 906 case -EBUSY: 907 fs_err(sdp, "waiting for recovery before freeze\n"); 908 break; 909 910 default: 911 fs_err(sdp, "error freezing FS: %d\n", error); 912 break; 913 } 914 915 fs_err(sdp, "retrying...\n"); 916 msleep(1000); 917 } 918 return 0; 919 } 920 921 /** 922 * gfs2_unfreeze - reallow writes to the filesystem 923 * @sb: the VFS structure for the filesystem 924 * 925 */ 926 927 static int gfs2_unfreeze(struct super_block *sb) 928 { 929 gfs2_unfreeze_fs(sb->s_fs_info); 930 return 0; 931 } 932 933 /** 934 * statfs_fill - fill in the sg for a given RG 935 * @rgd: the RG 936 * @sc: the sc structure 937 * 938 * Returns: 0 on success, -ESTALE if the LVB is invalid 939 */ 940 941 static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 942 struct gfs2_statfs_change_host *sc) 943 { 944 gfs2_rgrp_verify(rgd); 945 sc->sc_total += rgd->rd_data; 946 sc->sc_free += rgd->rd_free; 947 sc->sc_dinodes += rgd->rd_dinodes; 948 return 0; 949 } 950 951 /** 952 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 953 * @sdp: the filesystem 954 * @sc: the sc info that will be returned 955 * 956 * Any error (other than a signal) will cause this routine to fall back 957 * to the synchronous version. 958 * 959 * FIXME: This really shouldn't busy wait like this. 960 * 961 * Returns: errno 962 */ 963 964 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 965 { 966 struct gfs2_holder ri_gh; 967 struct gfs2_rgrpd *rgd_next; 968 struct gfs2_holder *gha, *gh; 969 unsigned int slots = 64; 970 unsigned int x; 971 int done; 972 int error = 0, err; 973 974 memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 975 gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 976 if (!gha) 977 return -ENOMEM; 978 979 error = gfs2_rindex_hold(sdp, &ri_gh); 980 if (error) 981 goto out; 982 983 rgd_next = gfs2_rgrpd_get_first(sdp); 984 985 for (;;) { 986 done = 1; 987 988 for (x = 0; x < slots; x++) { 989 gh = gha + x; 990 991 if (gh->gh_gl && gfs2_glock_poll(gh)) { 992 err = gfs2_glock_wait(gh); 993 if (err) { 994 gfs2_holder_uninit(gh); 995 error = err; 996 } else { 997 if (!error) 998 error = statfs_slow_fill( 999 gh->gh_gl->gl_object, sc); 1000 gfs2_glock_dq_uninit(gh); 1001 } 1002 } 1003 1004 if (gh->gh_gl) 1005 done = 0; 1006 else if (rgd_next && !error) { 1007 error = gfs2_glock_nq_init(rgd_next->rd_gl, 1008 LM_ST_SHARED, 1009 GL_ASYNC, 1010 gh); 1011 rgd_next = gfs2_rgrpd_get_next(rgd_next); 1012 done = 0; 1013 } 1014 1015 if (signal_pending(current)) 1016 error = -ERESTARTSYS; 1017 } 1018 1019 if (done) 1020 break; 1021 1022 yield(); 1023 } 1024 1025 gfs2_glock_dq_uninit(&ri_gh); 1026 1027 out: 1028 kfree(gha); 1029 return error; 1030 } 1031 1032 /** 1033 * gfs2_statfs_i - Do a statfs 1034 * @sdp: the filesystem 1035 * @sg: the sg structure 1036 * 1037 * Returns: errno 1038 */ 1039 1040 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 1041 { 1042 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 1043 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 1044 1045 spin_lock(&sdp->sd_statfs_spin); 1046 1047 *sc = *m_sc; 1048 sc->sc_total += l_sc->sc_total; 1049 sc->sc_free += l_sc->sc_free; 1050 sc->sc_dinodes += l_sc->sc_dinodes; 1051 1052 spin_unlock(&sdp->sd_statfs_spin); 1053 1054 if (sc->sc_free < 0) 1055 sc->sc_free = 0; 1056 if (sc->sc_free > sc->sc_total) 1057 sc->sc_free = sc->sc_total; 1058 if (sc->sc_dinodes < 0) 1059 sc->sc_dinodes = 0; 1060 1061 return 0; 1062 } 1063 1064 /** 1065 * gfs2_statfs - Gather and return stats about the filesystem 1066 * @sb: The superblock 1067 * @statfsbuf: The buffer 1068 * 1069 * Returns: 0 on success or error code 1070 */ 1071 1072 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1073 { 1074 struct super_block *sb = dentry->d_inode->i_sb; 1075 struct gfs2_sbd *sdp = sb->s_fs_info; 1076 struct gfs2_statfs_change_host sc; 1077 int error; 1078 1079 if (gfs2_tune_get(sdp, gt_statfs_slow)) 1080 error = gfs2_statfs_slow(sdp, &sc); 1081 else 1082 error = gfs2_statfs_i(sdp, &sc); 1083 1084 if (error) 1085 return error; 1086 1087 buf->f_type = GFS2_MAGIC; 1088 buf->f_bsize = sdp->sd_sb.sb_bsize; 1089 buf->f_blocks = sc.sc_total; 1090 buf->f_bfree = sc.sc_free; 1091 buf->f_bavail = sc.sc_free; 1092 buf->f_files = sc.sc_dinodes + sc.sc_free; 1093 buf->f_ffree = sc.sc_free; 1094 buf->f_namelen = GFS2_FNAMESIZE; 1095 1096 return 0; 1097 } 1098 1099 /** 1100 * gfs2_remount_fs - called when the FS is remounted 1101 * @sb: the filesystem 1102 * @flags: the remount flags 1103 * @data: extra data passed in (not used right now) 1104 * 1105 * Returns: errno 1106 */ 1107 1108 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) 1109 { 1110 struct gfs2_sbd *sdp = sb->s_fs_info; 1111 struct gfs2_args args = sdp->sd_args; /* Default to current settings */ 1112 struct gfs2_tune *gt = &sdp->sd_tune; 1113 int error; 1114 1115 spin_lock(>->gt_spin); 1116 args.ar_commit = gt->gt_logd_secs; 1117 args.ar_quota_quantum = gt->gt_quota_quantum; 1118 if (gt->gt_statfs_slow) 1119 args.ar_statfs_quantum = 0; 1120 else 1121 args.ar_statfs_quantum = gt->gt_statfs_quantum; 1122 spin_unlock(>->gt_spin); 1123 error = gfs2_mount_args(&args, data); 1124 if (error) 1125 return error; 1126 1127 /* Not allowed to change locking details */ 1128 if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || 1129 strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || 1130 strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) 1131 return -EINVAL; 1132 1133 /* Some flags must not be changed */ 1134 if (args_neq(&args, &sdp->sd_args, spectator) || 1135 args_neq(&args, &sdp->sd_args, ignore_local_fs) || 1136 args_neq(&args, &sdp->sd_args, localflocks) || 1137 args_neq(&args, &sdp->sd_args, localcaching) || 1138 args_neq(&args, &sdp->sd_args, meta)) 1139 return -EINVAL; 1140 1141 if (sdp->sd_args.ar_spectator) 1142 *flags |= MS_RDONLY; 1143 1144 if ((sb->s_flags ^ *flags) & MS_RDONLY) { 1145 if (*flags & MS_RDONLY) 1146 error = gfs2_make_fs_ro(sdp); 1147 else 1148 error = gfs2_make_fs_rw(sdp); 1149 if (error) 1150 return error; 1151 } 1152 1153 sdp->sd_args = args; 1154 if (sdp->sd_args.ar_posix_acl) 1155 sb->s_flags |= MS_POSIXACL; 1156 else 1157 sb->s_flags &= ~MS_POSIXACL; 1158 if (sdp->sd_args.ar_nobarrier) 1159 set_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1160 else 1161 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1162 spin_lock(>->gt_spin); 1163 gt->gt_logd_secs = args.ar_commit; 1164 gt->gt_quota_quantum = args.ar_quota_quantum; 1165 if (args.ar_statfs_quantum) { 1166 gt->gt_statfs_slow = 0; 1167 gt->gt_statfs_quantum = args.ar_statfs_quantum; 1168 } 1169 else { 1170 gt->gt_statfs_slow = 1; 1171 gt->gt_statfs_quantum = 30; 1172 } 1173 spin_unlock(>->gt_spin); 1174 1175 gfs2_online_uevent(sdp); 1176 return 0; 1177 } 1178 1179 /** 1180 * gfs2_drop_inode - Drop an inode (test for remote unlink) 1181 * @inode: The inode to drop 1182 * 1183 * If we've received a callback on an iopen lock then its because a 1184 * remote node tried to deallocate the inode but failed due to this node 1185 * still having the inode open. Here we mark the link count zero 1186 * since we know that it must have reached zero if the GLF_DEMOTE flag 1187 * is set on the iopen glock. If we didn't do a disk read since the 1188 * remote node removed the final link then we might otherwise miss 1189 * this event. This check ensures that this node will deallocate the 1190 * inode's blocks, or alternatively pass the baton on to another 1191 * node for later deallocation. 1192 */ 1193 1194 static void gfs2_drop_inode(struct inode *inode) 1195 { 1196 struct gfs2_inode *ip = GFS2_I(inode); 1197 1198 if (inode->i_nlink) { 1199 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1200 if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) 1201 clear_nlink(inode); 1202 } 1203 generic_drop_inode(inode); 1204 } 1205 1206 /** 1207 * gfs2_clear_inode - Deallocate an inode when VFS is done with it 1208 * @inode: The VFS inode 1209 * 1210 */ 1211 1212 static void gfs2_clear_inode(struct inode *inode) 1213 { 1214 struct gfs2_inode *ip = GFS2_I(inode); 1215 1216 ip->i_gl->gl_object = NULL; 1217 gfs2_glock_put(ip->i_gl); 1218 ip->i_gl = NULL; 1219 if (ip->i_iopen_gh.gh_gl) { 1220 ip->i_iopen_gh.gh_gl->gl_object = NULL; 1221 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1222 } 1223 } 1224 1225 static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 1226 { 1227 do { 1228 if (d1 == d2) 1229 return 1; 1230 d1 = d1->d_parent; 1231 } while (!IS_ROOT(d1)); 1232 return 0; 1233 } 1234 1235 /** 1236 * gfs2_show_options - Show mount options for /proc/mounts 1237 * @s: seq_file structure 1238 * @mnt: vfsmount 1239 * 1240 * Returns: 0 on success or error code 1241 */ 1242 1243 static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1244 { 1245 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; 1246 struct gfs2_args *args = &sdp->sd_args; 1247 int val; 1248 1249 if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) 1250 seq_printf(s, ",meta"); 1251 if (args->ar_lockproto[0]) 1252 seq_printf(s, ",lockproto=%s", args->ar_lockproto); 1253 if (args->ar_locktable[0]) 1254 seq_printf(s, ",locktable=%s", args->ar_locktable); 1255 if (args->ar_hostdata[0]) 1256 seq_printf(s, ",hostdata=%s", args->ar_hostdata); 1257 if (args->ar_spectator) 1258 seq_printf(s, ",spectator"); 1259 if (args->ar_ignore_local_fs) 1260 seq_printf(s, ",ignore_local_fs"); 1261 if (args->ar_localflocks) 1262 seq_printf(s, ",localflocks"); 1263 if (args->ar_localcaching) 1264 seq_printf(s, ",localcaching"); 1265 if (args->ar_debug) 1266 seq_printf(s, ",debug"); 1267 if (args->ar_upgrade) 1268 seq_printf(s, ",upgrade"); 1269 if (args->ar_posix_acl) 1270 seq_printf(s, ",acl"); 1271 if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 1272 char *state; 1273 switch (args->ar_quota) { 1274 case GFS2_QUOTA_OFF: 1275 state = "off"; 1276 break; 1277 case GFS2_QUOTA_ACCOUNT: 1278 state = "account"; 1279 break; 1280 case GFS2_QUOTA_ON: 1281 state = "on"; 1282 break; 1283 default: 1284 state = "unknown"; 1285 break; 1286 } 1287 seq_printf(s, ",quota=%s", state); 1288 } 1289 if (args->ar_suiddir) 1290 seq_printf(s, ",suiddir"); 1291 if (args->ar_data != GFS2_DATA_DEFAULT) { 1292 char *state; 1293 switch (args->ar_data) { 1294 case GFS2_DATA_WRITEBACK: 1295 state = "writeback"; 1296 break; 1297 case GFS2_DATA_ORDERED: 1298 state = "ordered"; 1299 break; 1300 default: 1301 state = "unknown"; 1302 break; 1303 } 1304 seq_printf(s, ",data=%s", state); 1305 } 1306 if (args->ar_discard) 1307 seq_printf(s, ",discard"); 1308 val = sdp->sd_tune.gt_logd_secs; 1309 if (val != 30) 1310 seq_printf(s, ",commit=%d", val); 1311 val = sdp->sd_tune.gt_statfs_quantum; 1312 if (val != 30) 1313 seq_printf(s, ",statfs_quantum=%d", val); 1314 val = sdp->sd_tune.gt_quota_quantum; 1315 if (val != 60) 1316 seq_printf(s, ",quota_quantum=%d", val); 1317 if (args->ar_statfs_percent) 1318 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); 1319 if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1320 const char *state; 1321 1322 switch (args->ar_errors) { 1323 case GFS2_ERRORS_WITHDRAW: 1324 state = "withdraw"; 1325 break; 1326 case GFS2_ERRORS_PANIC: 1327 state = "panic"; 1328 break; 1329 default: 1330 state = "unknown"; 1331 break; 1332 } 1333 seq_printf(s, ",errors=%s", state); 1334 } 1335 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) 1336 seq_printf(s, ",nobarrier"); 1337 1338 return 0; 1339 } 1340 1341 /* 1342 * We have to (at the moment) hold the inodes main lock to cover 1343 * the gap between unlocking the shared lock on the iopen lock and 1344 * taking the exclusive lock. I'd rather do a shared -> exclusive 1345 * conversion on the iopen lock, but we can change that later. This 1346 * is safe, just less efficient. 1347 */ 1348 1349 static void gfs2_delete_inode(struct inode *inode) 1350 { 1351 struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; 1352 struct gfs2_inode *ip = GFS2_I(inode); 1353 struct gfs2_holder gh; 1354 int error; 1355 1356 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 1357 if (unlikely(error)) { 1358 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1359 goto out; 1360 } 1361 1362 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 1363 if (error) 1364 goto out_truncate; 1365 1366 gfs2_glock_dq_wait(&ip->i_iopen_gh); 1367 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); 1368 error = gfs2_glock_nq(&ip->i_iopen_gh); 1369 if (error) 1370 goto out_truncate; 1371 1372 if (S_ISDIR(inode->i_mode) && 1373 (ip->i_diskflags & GFS2_DIF_EXHASH)) { 1374 error = gfs2_dir_exhash_dealloc(ip); 1375 if (error) 1376 goto out_unlock; 1377 } 1378 1379 if (ip->i_eattr) { 1380 error = gfs2_ea_dealloc(ip); 1381 if (error) 1382 goto out_unlock; 1383 } 1384 1385 if (!gfs2_is_stuffed(ip)) { 1386 error = gfs2_file_dealloc(ip); 1387 if (error) 1388 goto out_unlock; 1389 } 1390 1391 error = gfs2_dinode_dealloc(ip); 1392 if (error) 1393 goto out_unlock; 1394 1395 out_truncate: 1396 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 1397 if (error) 1398 goto out_unlock; 1399 /* Needs to be done before glock release & also in a transaction */ 1400 truncate_inode_pages(&inode->i_data, 0); 1401 gfs2_trans_end(sdp); 1402 1403 out_unlock: 1404 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) 1405 gfs2_glock_dq(&ip->i_iopen_gh); 1406 gfs2_holder_uninit(&ip->i_iopen_gh); 1407 gfs2_glock_dq_uninit(&gh); 1408 if (error && error != GLR_TRYFAILED && error != -EROFS) 1409 fs_warn(sdp, "gfs2_delete_inode: %d\n", error); 1410 out: 1411 truncate_inode_pages(&inode->i_data, 0); 1412 clear_inode(inode); 1413 } 1414 1415 static struct inode *gfs2_alloc_inode(struct super_block *sb) 1416 { 1417 struct gfs2_inode *ip; 1418 1419 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); 1420 if (ip) { 1421 ip->i_flags = 0; 1422 ip->i_gl = NULL; 1423 } 1424 return &ip->i_inode; 1425 } 1426 1427 static void gfs2_destroy_inode(struct inode *inode) 1428 { 1429 kmem_cache_free(gfs2_inode_cachep, inode); 1430 } 1431 1432 const struct super_operations gfs2_super_ops = { 1433 .alloc_inode = gfs2_alloc_inode, 1434 .destroy_inode = gfs2_destroy_inode, 1435 .write_inode = gfs2_write_inode, 1436 .delete_inode = gfs2_delete_inode, 1437 .put_super = gfs2_put_super, 1438 .sync_fs = gfs2_sync_fs, 1439 .freeze_fs = gfs2_freeze, 1440 .unfreeze_fs = gfs2_unfreeze, 1441 .statfs = gfs2_statfs, 1442 .remount_fs = gfs2_remount_fs, 1443 .clear_inode = gfs2_clear_inode, 1444 .drop_inode = gfs2_drop_inode, 1445 .show_options = gfs2_show_options, 1446 }; 1447 1448