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 26 #include "gfs2.h" 27 #include "incore.h" 28 #include "bmap.h" 29 #include "dir.h" 30 #include "glock.h" 31 #include "glops.h" 32 #include "inode.h" 33 #include "log.h" 34 #include "meta_io.h" 35 #include "quota.h" 36 #include "recovery.h" 37 #include "rgrp.h" 38 #include "super.h" 39 #include "trans.h" 40 #include "util.h" 41 #include "sys.h" 42 #include "xattr.h" 43 44 #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) 45 46 enum { 47 Opt_lockproto, 48 Opt_locktable, 49 Opt_hostdata, 50 Opt_spectator, 51 Opt_ignore_local_fs, 52 Opt_localflocks, 53 Opt_localcaching, 54 Opt_debug, 55 Opt_nodebug, 56 Opt_upgrade, 57 Opt_acl, 58 Opt_noacl, 59 Opt_quota_off, 60 Opt_quota_account, 61 Opt_quota_on, 62 Opt_quota, 63 Opt_noquota, 64 Opt_suiddir, 65 Opt_nosuiddir, 66 Opt_data_writeback, 67 Opt_data_ordered, 68 Opt_meta, 69 Opt_discard, 70 Opt_nodiscard, 71 Opt_commit, 72 Opt_err_withdraw, 73 Opt_err_panic, 74 Opt_statfs_quantum, 75 Opt_statfs_percent, 76 Opt_quota_quantum, 77 Opt_barrier, 78 Opt_nobarrier, 79 Opt_error, 80 }; 81 82 static const match_table_t tokens = { 83 {Opt_lockproto, "lockproto=%s"}, 84 {Opt_locktable, "locktable=%s"}, 85 {Opt_hostdata, "hostdata=%s"}, 86 {Opt_spectator, "spectator"}, 87 {Opt_ignore_local_fs, "ignore_local_fs"}, 88 {Opt_localflocks, "localflocks"}, 89 {Opt_localcaching, "localcaching"}, 90 {Opt_debug, "debug"}, 91 {Opt_nodebug, "nodebug"}, 92 {Opt_upgrade, "upgrade"}, 93 {Opt_acl, "acl"}, 94 {Opt_noacl, "noacl"}, 95 {Opt_quota_off, "quota=off"}, 96 {Opt_quota_account, "quota=account"}, 97 {Opt_quota_on, "quota=on"}, 98 {Opt_quota, "quota"}, 99 {Opt_noquota, "noquota"}, 100 {Opt_suiddir, "suiddir"}, 101 {Opt_nosuiddir, "nosuiddir"}, 102 {Opt_data_writeback, "data=writeback"}, 103 {Opt_data_ordered, "data=ordered"}, 104 {Opt_meta, "meta"}, 105 {Opt_discard, "discard"}, 106 {Opt_nodiscard, "nodiscard"}, 107 {Opt_commit, "commit=%d"}, 108 {Opt_err_withdraw, "errors=withdraw"}, 109 {Opt_err_panic, "errors=panic"}, 110 {Opt_statfs_quantum, "statfs_quantum=%d"}, 111 {Opt_statfs_percent, "statfs_percent=%d"}, 112 {Opt_quota_quantum, "quota_quantum=%d"}, 113 {Opt_barrier, "barrier"}, 114 {Opt_nobarrier, "nobarrier"}, 115 {Opt_error, NULL} 116 }; 117 118 /** 119 * gfs2_mount_args - Parse mount options 120 * @args: The structure into which the parsed options will be written 121 * @options: The options to parse 122 * 123 * Return: errno 124 */ 125 126 int gfs2_mount_args(struct gfs2_args *args, char *options) 127 { 128 char *o; 129 int token; 130 substring_t tmp[MAX_OPT_ARGS]; 131 int rv; 132 133 /* Split the options into tokens with the "," character and 134 process them */ 135 136 while (1) { 137 o = strsep(&options, ","); 138 if (o == NULL) 139 break; 140 if (*o == '\0') 141 continue; 142 143 token = match_token(o, tokens, tmp); 144 switch (token) { 145 case Opt_lockproto: 146 match_strlcpy(args->ar_lockproto, &tmp[0], 147 GFS2_LOCKNAME_LEN); 148 break; 149 case Opt_locktable: 150 match_strlcpy(args->ar_locktable, &tmp[0], 151 GFS2_LOCKNAME_LEN); 152 break; 153 case Opt_hostdata: 154 match_strlcpy(args->ar_hostdata, &tmp[0], 155 GFS2_LOCKNAME_LEN); 156 break; 157 case Opt_spectator: 158 args->ar_spectator = 1; 159 break; 160 case Opt_ignore_local_fs: 161 args->ar_ignore_local_fs = 1; 162 break; 163 case Opt_localflocks: 164 args->ar_localflocks = 1; 165 break; 166 case Opt_localcaching: 167 args->ar_localcaching = 1; 168 break; 169 case Opt_debug: 170 if (args->ar_errors == GFS2_ERRORS_PANIC) { 171 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 172 "are mutually exclusive.\n"); 173 return -EINVAL; 174 } 175 args->ar_debug = 1; 176 break; 177 case Opt_nodebug: 178 args->ar_debug = 0; 179 break; 180 case Opt_upgrade: 181 args->ar_upgrade = 1; 182 break; 183 case Opt_acl: 184 args->ar_posix_acl = 1; 185 break; 186 case Opt_noacl: 187 args->ar_posix_acl = 0; 188 break; 189 case Opt_quota_off: 190 case Opt_noquota: 191 args->ar_quota = GFS2_QUOTA_OFF; 192 break; 193 case Opt_quota_account: 194 args->ar_quota = GFS2_QUOTA_ACCOUNT; 195 break; 196 case Opt_quota_on: 197 case Opt_quota: 198 args->ar_quota = GFS2_QUOTA_ON; 199 break; 200 case Opt_suiddir: 201 args->ar_suiddir = 1; 202 break; 203 case Opt_nosuiddir: 204 args->ar_suiddir = 0; 205 break; 206 case Opt_data_writeback: 207 args->ar_data = GFS2_DATA_WRITEBACK; 208 break; 209 case Opt_data_ordered: 210 args->ar_data = GFS2_DATA_ORDERED; 211 break; 212 case Opt_meta: 213 args->ar_meta = 1; 214 break; 215 case Opt_discard: 216 args->ar_discard = 1; 217 break; 218 case Opt_nodiscard: 219 args->ar_discard = 0; 220 break; 221 case Opt_commit: 222 rv = match_int(&tmp[0], &args->ar_commit); 223 if (rv || args->ar_commit <= 0) { 224 printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n"); 225 return rv ? rv : -EINVAL; 226 } 227 break; 228 case Opt_statfs_quantum: 229 rv = match_int(&tmp[0], &args->ar_statfs_quantum); 230 if (rv || args->ar_statfs_quantum < 0) { 231 printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n"); 232 return rv ? rv : -EINVAL; 233 } 234 break; 235 case Opt_quota_quantum: 236 rv = match_int(&tmp[0], &args->ar_quota_quantum); 237 if (rv || args->ar_quota_quantum <= 0) { 238 printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n"); 239 return rv ? rv : -EINVAL; 240 } 241 break; 242 case Opt_statfs_percent: 243 rv = match_int(&tmp[0], &args->ar_statfs_percent); 244 if (rv || args->ar_statfs_percent < 0 || 245 args->ar_statfs_percent > 100) { 246 printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n"); 247 return rv ? rv : -EINVAL; 248 } 249 break; 250 case Opt_err_withdraw: 251 args->ar_errors = GFS2_ERRORS_WITHDRAW; 252 break; 253 case Opt_err_panic: 254 if (args->ar_debug) { 255 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 256 "are mutually exclusive.\n"); 257 return -EINVAL; 258 } 259 args->ar_errors = GFS2_ERRORS_PANIC; 260 break; 261 case Opt_barrier: 262 args->ar_nobarrier = 0; 263 break; 264 case Opt_nobarrier: 265 args->ar_nobarrier = 1; 266 break; 267 case Opt_error: 268 default: 269 printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o); 270 return -EINVAL; 271 } 272 } 273 274 return 0; 275 } 276 277 /** 278 * gfs2_jindex_free - Clear all the journal index information 279 * @sdp: The GFS2 superblock 280 * 281 */ 282 283 void gfs2_jindex_free(struct gfs2_sbd *sdp) 284 { 285 struct list_head list, *head; 286 struct gfs2_jdesc *jd; 287 struct gfs2_journal_extent *jext; 288 289 spin_lock(&sdp->sd_jindex_spin); 290 list_add(&list, &sdp->sd_jindex_list); 291 list_del_init(&sdp->sd_jindex_list); 292 sdp->sd_journals = 0; 293 spin_unlock(&sdp->sd_jindex_spin); 294 295 while (!list_empty(&list)) { 296 jd = list_entry(list.next, struct gfs2_jdesc, jd_list); 297 head = &jd->extent_list; 298 while (!list_empty(head)) { 299 jext = list_entry(head->next, 300 struct gfs2_journal_extent, 301 extent_list); 302 list_del(&jext->extent_list); 303 kfree(jext); 304 } 305 list_del(&jd->jd_list); 306 iput(jd->jd_inode); 307 kfree(jd); 308 } 309 } 310 311 static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) 312 { 313 struct gfs2_jdesc *jd; 314 int found = 0; 315 316 list_for_each_entry(jd, head, jd_list) { 317 if (jd->jd_jid == jid) { 318 found = 1; 319 break; 320 } 321 } 322 323 if (!found) 324 jd = NULL; 325 326 return jd; 327 } 328 329 struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) 330 { 331 struct gfs2_jdesc *jd; 332 333 spin_lock(&sdp->sd_jindex_spin); 334 jd = jdesc_find_i(&sdp->sd_jindex_list, jid); 335 spin_unlock(&sdp->sd_jindex_spin); 336 337 return jd; 338 } 339 340 int gfs2_jdesc_check(struct gfs2_jdesc *jd) 341 { 342 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 343 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 344 int ar; 345 int error; 346 347 if (ip->i_disksize < (8 << 20) || ip->i_disksize > (1 << 30) || 348 (ip->i_disksize & (sdp->sd_sb.sb_bsize - 1))) { 349 gfs2_consist_inode(ip); 350 return -EIO; 351 } 352 jd->jd_blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; 353 354 error = gfs2_write_alloc_required(ip, 0, ip->i_disksize, &ar); 355 if (!error && ar) { 356 gfs2_consist_inode(ip); 357 error = -EIO; 358 } 359 360 return error; 361 } 362 363 /** 364 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one 365 * @sdp: the filesystem 366 * 367 * Returns: errno 368 */ 369 370 int gfs2_make_fs_rw(struct gfs2_sbd *sdp) 371 { 372 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); 373 struct gfs2_glock *j_gl = ip->i_gl; 374 struct gfs2_holder t_gh; 375 struct gfs2_log_header_host head; 376 int error; 377 378 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); 379 if (error) 380 return error; 381 382 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); 383 384 error = gfs2_find_jhead(sdp->sd_jdesc, &head); 385 if (error) 386 goto fail; 387 388 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 389 gfs2_consist(sdp); 390 error = -EIO; 391 goto fail; 392 } 393 394 /* Initialize some head of the log stuff */ 395 sdp->sd_log_sequence = head.lh_sequence + 1; 396 gfs2_log_pointers_init(sdp, head.lh_blkno); 397 398 error = gfs2_quota_init(sdp); 399 if (error) 400 goto fail; 401 402 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 403 404 gfs2_glock_dq_uninit(&t_gh); 405 406 return 0; 407 408 fail: 409 t_gh.gh_flags |= GL_NOCACHE; 410 gfs2_glock_dq_uninit(&t_gh); 411 412 return error; 413 } 414 415 void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) 416 { 417 const struct gfs2_statfs_change *str = buf; 418 419 sc->sc_total = be64_to_cpu(str->sc_total); 420 sc->sc_free = be64_to_cpu(str->sc_free); 421 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); 422 } 423 424 static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) 425 { 426 struct gfs2_statfs_change *str = buf; 427 428 str->sc_total = cpu_to_be64(sc->sc_total); 429 str->sc_free = cpu_to_be64(sc->sc_free); 430 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); 431 } 432 433 int gfs2_statfs_init(struct gfs2_sbd *sdp) 434 { 435 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 436 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 437 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 438 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 439 struct buffer_head *m_bh, *l_bh; 440 struct gfs2_holder gh; 441 int error; 442 443 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 444 &gh); 445 if (error) 446 return error; 447 448 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 449 if (error) 450 goto out; 451 452 if (sdp->sd_args.ar_spectator) { 453 spin_lock(&sdp->sd_statfs_spin); 454 gfs2_statfs_change_in(m_sc, m_bh->b_data + 455 sizeof(struct gfs2_dinode)); 456 spin_unlock(&sdp->sd_statfs_spin); 457 } else { 458 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 459 if (error) 460 goto out_m_bh; 461 462 spin_lock(&sdp->sd_statfs_spin); 463 gfs2_statfs_change_in(m_sc, m_bh->b_data + 464 sizeof(struct gfs2_dinode)); 465 gfs2_statfs_change_in(l_sc, l_bh->b_data + 466 sizeof(struct gfs2_dinode)); 467 spin_unlock(&sdp->sd_statfs_spin); 468 469 brelse(l_bh); 470 } 471 472 out_m_bh: 473 brelse(m_bh); 474 out: 475 gfs2_glock_dq_uninit(&gh); 476 return 0; 477 } 478 479 void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, 480 s64 dinodes) 481 { 482 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 483 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 484 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 485 struct buffer_head *l_bh; 486 s64 x, y; 487 int need_sync = 0; 488 int error; 489 490 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 491 if (error) 492 return; 493 494 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 495 496 spin_lock(&sdp->sd_statfs_spin); 497 l_sc->sc_total += total; 498 l_sc->sc_free += free; 499 l_sc->sc_dinodes += dinodes; 500 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); 501 if (sdp->sd_args.ar_statfs_percent) { 502 x = 100 * l_sc->sc_free; 503 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; 504 if (x >= y || x <= -y) 505 need_sync = 1; 506 } 507 spin_unlock(&sdp->sd_statfs_spin); 508 509 brelse(l_bh); 510 if (need_sync) 511 gfs2_wake_up_statfs(sdp); 512 } 513 514 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, 515 struct buffer_head *l_bh) 516 { 517 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 518 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 519 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 520 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 521 522 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 523 524 spin_lock(&sdp->sd_statfs_spin); 525 m_sc->sc_total += l_sc->sc_total; 526 m_sc->sc_free += l_sc->sc_free; 527 m_sc->sc_dinodes += l_sc->sc_dinodes; 528 memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); 529 memset(l_bh->b_data + sizeof(struct gfs2_dinode), 530 0, sizeof(struct gfs2_statfs_change)); 531 spin_unlock(&sdp->sd_statfs_spin); 532 533 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); 534 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); 535 } 536 537 int gfs2_statfs_sync(struct super_block *sb, int type) 538 { 539 struct gfs2_sbd *sdp = sb->s_fs_info; 540 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 541 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 542 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 543 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 544 struct gfs2_holder gh; 545 struct buffer_head *m_bh, *l_bh; 546 int error; 547 548 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 549 &gh); 550 if (error) 551 return error; 552 553 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 554 if (error) 555 goto out; 556 557 spin_lock(&sdp->sd_statfs_spin); 558 gfs2_statfs_change_in(m_sc, m_bh->b_data + 559 sizeof(struct gfs2_dinode)); 560 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { 561 spin_unlock(&sdp->sd_statfs_spin); 562 goto out_bh; 563 } 564 spin_unlock(&sdp->sd_statfs_spin); 565 566 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 567 if (error) 568 goto out_bh; 569 570 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); 571 if (error) 572 goto out_bh2; 573 574 update_statfs(sdp, m_bh, l_bh); 575 sdp->sd_statfs_force_sync = 0; 576 577 gfs2_trans_end(sdp); 578 579 out_bh2: 580 brelse(l_bh); 581 out_bh: 582 brelse(m_bh); 583 out: 584 gfs2_glock_dq_uninit(&gh); 585 return error; 586 } 587 588 struct lfcc { 589 struct list_head list; 590 struct gfs2_holder gh; 591 }; 592 593 /** 594 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all 595 * journals are clean 596 * @sdp: the file system 597 * @state: the state to put the transaction lock into 598 * @t_gh: the hold on the transaction lock 599 * 600 * Returns: errno 601 */ 602 603 static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, 604 struct gfs2_holder *t_gh) 605 { 606 struct gfs2_inode *ip; 607 struct gfs2_jdesc *jd; 608 struct lfcc *lfcc; 609 LIST_HEAD(list); 610 struct gfs2_log_header_host lh; 611 int error; 612 613 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 614 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); 615 if (!lfcc) { 616 error = -ENOMEM; 617 goto out; 618 } 619 ip = GFS2_I(jd->jd_inode); 620 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); 621 if (error) { 622 kfree(lfcc); 623 goto out; 624 } 625 list_add(&lfcc->list, &list); 626 } 627 628 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, 629 GL_NOCACHE, t_gh); 630 631 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 632 error = gfs2_jdesc_check(jd); 633 if (error) 634 break; 635 error = gfs2_find_jhead(jd, &lh); 636 if (error) 637 break; 638 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 639 error = -EBUSY; 640 break; 641 } 642 } 643 644 if (error) 645 gfs2_glock_dq_uninit(t_gh); 646 647 out: 648 while (!list_empty(&list)) { 649 lfcc = list_entry(list.next, struct lfcc, list); 650 list_del(&lfcc->list); 651 gfs2_glock_dq_uninit(&lfcc->gh); 652 kfree(lfcc); 653 } 654 return error; 655 } 656 657 /** 658 * gfs2_freeze_fs - freezes the file system 659 * @sdp: the file system 660 * 661 * This function flushes data and meta data for all machines by 662 * aquiring the transaction log exclusively. All journals are 663 * ensured to be in a clean state as well. 664 * 665 * Returns: errno 666 */ 667 668 int gfs2_freeze_fs(struct gfs2_sbd *sdp) 669 { 670 int error = 0; 671 672 mutex_lock(&sdp->sd_freeze_lock); 673 674 if (!sdp->sd_freeze_count++) { 675 error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); 676 if (error) 677 sdp->sd_freeze_count--; 678 } 679 680 mutex_unlock(&sdp->sd_freeze_lock); 681 682 return error; 683 } 684 685 /** 686 * gfs2_unfreeze_fs - unfreezes the file system 687 * @sdp: the file system 688 * 689 * This function allows the file system to proceed by unlocking 690 * the exclusively held transaction lock. Other GFS2 nodes are 691 * now free to acquire the lock shared and go on with their lives. 692 * 693 */ 694 695 void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) 696 { 697 mutex_lock(&sdp->sd_freeze_lock); 698 699 if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) 700 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 701 702 mutex_unlock(&sdp->sd_freeze_lock); 703 } 704 705 706 /** 707 * gfs2_write_inode - Make sure the inode is stable on the disk 708 * @inode: The inode 709 * @sync: synchronous write flag 710 * 711 * Returns: errno 712 */ 713 714 static int gfs2_write_inode(struct inode *inode, int sync) 715 { 716 struct gfs2_inode *ip = GFS2_I(inode); 717 struct gfs2_sbd *sdp = GFS2_SB(inode); 718 struct gfs2_holder gh; 719 struct buffer_head *bh; 720 struct timespec atime; 721 struct gfs2_dinode *di; 722 int ret = 0; 723 724 /* Check this is a "normal" inode, etc */ 725 if (!test_bit(GIF_USER, &ip->i_flags) || 726 (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 (sync != 0) 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); 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 gfs2_gl_hash_clear(sdp); 864 /* Unmount the locking protocol */ 865 gfs2_lm_unmount(sdp); 866 867 /* At this point, we're through participating in the lockspace */ 868 gfs2_sys_fs_del(sdp); 869 } 870 871 /** 872 * gfs2_sync_fs - sync the filesystem 873 * @sb: the superblock 874 * 875 * Flushes the log to disk. 876 */ 877 878 static int gfs2_sync_fs(struct super_block *sb, int wait) 879 { 880 if (wait && sb->s_fs_info) 881 gfs2_log_flush(sb->s_fs_info, NULL); 882 return 0; 883 } 884 885 /** 886 * gfs2_freeze - prevent further writes to the filesystem 887 * @sb: the VFS structure for the filesystem 888 * 889 */ 890 891 static int gfs2_freeze(struct super_block *sb) 892 { 893 struct gfs2_sbd *sdp = sb->s_fs_info; 894 int error; 895 896 if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 897 return -EINVAL; 898 899 for (;;) { 900 error = gfs2_freeze_fs(sdp); 901 if (!error) 902 break; 903 904 switch (error) { 905 case -EBUSY: 906 fs_err(sdp, "waiting for recovery before freeze\n"); 907 break; 908 909 default: 910 fs_err(sdp, "error freezing FS: %d\n", error); 911 break; 912 } 913 914 fs_err(sdp, "retrying...\n"); 915 msleep(1000); 916 } 917 return 0; 918 } 919 920 /** 921 * gfs2_unfreeze - reallow writes to the filesystem 922 * @sb: the VFS structure for the filesystem 923 * 924 */ 925 926 static int gfs2_unfreeze(struct super_block *sb) 927 { 928 gfs2_unfreeze_fs(sb->s_fs_info); 929 return 0; 930 } 931 932 /** 933 * statfs_fill - fill in the sg for a given RG 934 * @rgd: the RG 935 * @sc: the sc structure 936 * 937 * Returns: 0 on success, -ESTALE if the LVB is invalid 938 */ 939 940 static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 941 struct gfs2_statfs_change_host *sc) 942 { 943 gfs2_rgrp_verify(rgd); 944 sc->sc_total += rgd->rd_data; 945 sc->sc_free += rgd->rd_free; 946 sc->sc_dinodes += rgd->rd_dinodes; 947 return 0; 948 } 949 950 /** 951 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 952 * @sdp: the filesystem 953 * @sc: the sc info that will be returned 954 * 955 * Any error (other than a signal) will cause this routine to fall back 956 * to the synchronous version. 957 * 958 * FIXME: This really shouldn't busy wait like this. 959 * 960 * Returns: errno 961 */ 962 963 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 964 { 965 struct gfs2_holder ri_gh; 966 struct gfs2_rgrpd *rgd_next; 967 struct gfs2_holder *gha, *gh; 968 unsigned int slots = 64; 969 unsigned int x; 970 int done; 971 int error = 0, err; 972 973 memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 974 gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 975 if (!gha) 976 return -ENOMEM; 977 978 error = gfs2_rindex_hold(sdp, &ri_gh); 979 if (error) 980 goto out; 981 982 rgd_next = gfs2_rgrpd_get_first(sdp); 983 984 for (;;) { 985 done = 1; 986 987 for (x = 0; x < slots; x++) { 988 gh = gha + x; 989 990 if (gh->gh_gl && gfs2_glock_poll(gh)) { 991 err = gfs2_glock_wait(gh); 992 if (err) { 993 gfs2_holder_uninit(gh); 994 error = err; 995 } else { 996 if (!error) 997 error = statfs_slow_fill( 998 gh->gh_gl->gl_object, sc); 999 gfs2_glock_dq_uninit(gh); 1000 } 1001 } 1002 1003 if (gh->gh_gl) 1004 done = 0; 1005 else if (rgd_next && !error) { 1006 error = gfs2_glock_nq_init(rgd_next->rd_gl, 1007 LM_ST_SHARED, 1008 GL_ASYNC, 1009 gh); 1010 rgd_next = gfs2_rgrpd_get_next(rgd_next); 1011 done = 0; 1012 } 1013 1014 if (signal_pending(current)) 1015 error = -ERESTARTSYS; 1016 } 1017 1018 if (done) 1019 break; 1020 1021 yield(); 1022 } 1023 1024 gfs2_glock_dq_uninit(&ri_gh); 1025 1026 out: 1027 kfree(gha); 1028 return error; 1029 } 1030 1031 /** 1032 * gfs2_statfs_i - Do a statfs 1033 * @sdp: the filesystem 1034 * @sg: the sg structure 1035 * 1036 * Returns: errno 1037 */ 1038 1039 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 1040 { 1041 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 1042 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 1043 1044 spin_lock(&sdp->sd_statfs_spin); 1045 1046 *sc = *m_sc; 1047 sc->sc_total += l_sc->sc_total; 1048 sc->sc_free += l_sc->sc_free; 1049 sc->sc_dinodes += l_sc->sc_dinodes; 1050 1051 spin_unlock(&sdp->sd_statfs_spin); 1052 1053 if (sc->sc_free < 0) 1054 sc->sc_free = 0; 1055 if (sc->sc_free > sc->sc_total) 1056 sc->sc_free = sc->sc_total; 1057 if (sc->sc_dinodes < 0) 1058 sc->sc_dinodes = 0; 1059 1060 return 0; 1061 } 1062 1063 /** 1064 * gfs2_statfs - Gather and return stats about the filesystem 1065 * @sb: The superblock 1066 * @statfsbuf: The buffer 1067 * 1068 * Returns: 0 on success or error code 1069 */ 1070 1071 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1072 { 1073 struct super_block *sb = dentry->d_inode->i_sb; 1074 struct gfs2_sbd *sdp = sb->s_fs_info; 1075 struct gfs2_statfs_change_host sc; 1076 int error; 1077 1078 if (gfs2_tune_get(sdp, gt_statfs_slow)) 1079 error = gfs2_statfs_slow(sdp, &sc); 1080 else 1081 error = gfs2_statfs_i(sdp, &sc); 1082 1083 if (error) 1084 return error; 1085 1086 buf->f_type = GFS2_MAGIC; 1087 buf->f_bsize = sdp->sd_sb.sb_bsize; 1088 buf->f_blocks = sc.sc_total; 1089 buf->f_bfree = sc.sc_free; 1090 buf->f_bavail = sc.sc_free; 1091 buf->f_files = sc.sc_dinodes + sc.sc_free; 1092 buf->f_ffree = sc.sc_free; 1093 buf->f_namelen = GFS2_FNAMESIZE; 1094 1095 return 0; 1096 } 1097 1098 /** 1099 * gfs2_remount_fs - called when the FS is remounted 1100 * @sb: the filesystem 1101 * @flags: the remount flags 1102 * @data: extra data passed in (not used right now) 1103 * 1104 * Returns: errno 1105 */ 1106 1107 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) 1108 { 1109 struct gfs2_sbd *sdp = sb->s_fs_info; 1110 struct gfs2_args args = sdp->sd_args; /* Default to current settings */ 1111 struct gfs2_tune *gt = &sdp->sd_tune; 1112 int error; 1113 1114 spin_lock(>->gt_spin); 1115 args.ar_commit = gt->gt_log_flush_secs; 1116 args.ar_quota_quantum = gt->gt_quota_quantum; 1117 if (gt->gt_statfs_slow) 1118 args.ar_statfs_quantum = 0; 1119 else 1120 args.ar_statfs_quantum = gt->gt_statfs_quantum; 1121 spin_unlock(>->gt_spin); 1122 error = gfs2_mount_args(&args, data); 1123 if (error) 1124 return error; 1125 1126 /* Not allowed to change locking details */ 1127 if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || 1128 strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || 1129 strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) 1130 return -EINVAL; 1131 1132 /* Some flags must not be changed */ 1133 if (args_neq(&args, &sdp->sd_args, spectator) || 1134 args_neq(&args, &sdp->sd_args, ignore_local_fs) || 1135 args_neq(&args, &sdp->sd_args, localflocks) || 1136 args_neq(&args, &sdp->sd_args, localcaching) || 1137 args_neq(&args, &sdp->sd_args, meta)) 1138 return -EINVAL; 1139 1140 if (sdp->sd_args.ar_spectator) 1141 *flags |= MS_RDONLY; 1142 1143 if ((sb->s_flags ^ *flags) & MS_RDONLY) { 1144 if (*flags & MS_RDONLY) 1145 error = gfs2_make_fs_ro(sdp); 1146 else 1147 error = gfs2_make_fs_rw(sdp); 1148 if (error) 1149 return error; 1150 } 1151 1152 sdp->sd_args = args; 1153 if (sdp->sd_args.ar_posix_acl) 1154 sb->s_flags |= MS_POSIXACL; 1155 else 1156 sb->s_flags &= ~MS_POSIXACL; 1157 if (sdp->sd_args.ar_nobarrier) 1158 set_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1159 else 1160 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1161 spin_lock(>->gt_spin); 1162 gt->gt_log_flush_secs = args.ar_commit; 1163 gt->gt_quota_quantum = args.ar_quota_quantum; 1164 if (args.ar_statfs_quantum) { 1165 gt->gt_statfs_slow = 0; 1166 gt->gt_statfs_quantum = args.ar_statfs_quantum; 1167 } 1168 else { 1169 gt->gt_statfs_slow = 1; 1170 gt->gt_statfs_quantum = 30; 1171 } 1172 spin_unlock(>->gt_spin); 1173 1174 gfs2_online_uevent(sdp); 1175 return 0; 1176 } 1177 1178 /** 1179 * gfs2_drop_inode - Drop an inode (test for remote unlink) 1180 * @inode: The inode to drop 1181 * 1182 * If we've received a callback on an iopen lock then its because a 1183 * remote node tried to deallocate the inode but failed due to this node 1184 * still having the inode open. Here we mark the link count zero 1185 * since we know that it must have reached zero if the GLF_DEMOTE flag 1186 * is set on the iopen glock. If we didn't do a disk read since the 1187 * remote node removed the final link then we might otherwise miss 1188 * this event. This check ensures that this node will deallocate the 1189 * inode's blocks, or alternatively pass the baton on to another 1190 * node for later deallocation. 1191 */ 1192 1193 static void gfs2_drop_inode(struct inode *inode) 1194 { 1195 struct gfs2_inode *ip = GFS2_I(inode); 1196 1197 if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) { 1198 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1199 if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) 1200 clear_nlink(inode); 1201 } 1202 generic_drop_inode(inode); 1203 } 1204 1205 /** 1206 * gfs2_clear_inode - Deallocate an inode when VFS is done with it 1207 * @inode: The VFS inode 1208 * 1209 */ 1210 1211 static void gfs2_clear_inode(struct inode *inode) 1212 { 1213 struct gfs2_inode *ip = GFS2_I(inode); 1214 1215 /* This tells us its a "real" inode and not one which only 1216 * serves to contain an address space (see rgrp.c, meta_io.c) 1217 * which therefore doesn't have its own glocks. 1218 */ 1219 if (test_bit(GIF_USER, &ip->i_flags)) { 1220 ip->i_gl->gl_object = NULL; 1221 gfs2_glock_put(ip->i_gl); 1222 ip->i_gl = NULL; 1223 if (ip->i_iopen_gh.gh_gl) { 1224 ip->i_iopen_gh.gh_gl->gl_object = NULL; 1225 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1226 } 1227 } 1228 } 1229 1230 static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 1231 { 1232 do { 1233 if (d1 == d2) 1234 return 1; 1235 d1 = d1->d_parent; 1236 } while (!IS_ROOT(d1)); 1237 return 0; 1238 } 1239 1240 /** 1241 * gfs2_show_options - Show mount options for /proc/mounts 1242 * @s: seq_file structure 1243 * @mnt: vfsmount 1244 * 1245 * Returns: 0 on success or error code 1246 */ 1247 1248 static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1249 { 1250 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; 1251 struct gfs2_args *args = &sdp->sd_args; 1252 int val; 1253 1254 if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) 1255 seq_printf(s, ",meta"); 1256 if (args->ar_lockproto[0]) 1257 seq_printf(s, ",lockproto=%s", args->ar_lockproto); 1258 if (args->ar_locktable[0]) 1259 seq_printf(s, ",locktable=%s", args->ar_locktable); 1260 if (args->ar_hostdata[0]) 1261 seq_printf(s, ",hostdata=%s", args->ar_hostdata); 1262 if (args->ar_spectator) 1263 seq_printf(s, ",spectator"); 1264 if (args->ar_ignore_local_fs) 1265 seq_printf(s, ",ignore_local_fs"); 1266 if (args->ar_localflocks) 1267 seq_printf(s, ",localflocks"); 1268 if (args->ar_localcaching) 1269 seq_printf(s, ",localcaching"); 1270 if (args->ar_debug) 1271 seq_printf(s, ",debug"); 1272 if (args->ar_upgrade) 1273 seq_printf(s, ",upgrade"); 1274 if (args->ar_posix_acl) 1275 seq_printf(s, ",acl"); 1276 if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 1277 char *state; 1278 switch (args->ar_quota) { 1279 case GFS2_QUOTA_OFF: 1280 state = "off"; 1281 break; 1282 case GFS2_QUOTA_ACCOUNT: 1283 state = "account"; 1284 break; 1285 case GFS2_QUOTA_ON: 1286 state = "on"; 1287 break; 1288 default: 1289 state = "unknown"; 1290 break; 1291 } 1292 seq_printf(s, ",quota=%s", state); 1293 } 1294 if (args->ar_suiddir) 1295 seq_printf(s, ",suiddir"); 1296 if (args->ar_data != GFS2_DATA_DEFAULT) { 1297 char *state; 1298 switch (args->ar_data) { 1299 case GFS2_DATA_WRITEBACK: 1300 state = "writeback"; 1301 break; 1302 case GFS2_DATA_ORDERED: 1303 state = "ordered"; 1304 break; 1305 default: 1306 state = "unknown"; 1307 break; 1308 } 1309 seq_printf(s, ",data=%s", state); 1310 } 1311 if (args->ar_discard) 1312 seq_printf(s, ",discard"); 1313 val = sdp->sd_tune.gt_log_flush_secs; 1314 if (val != 60) 1315 seq_printf(s, ",commit=%d", val); 1316 val = sdp->sd_tune.gt_statfs_quantum; 1317 if (val != 30) 1318 seq_printf(s, ",statfs_quantum=%d", val); 1319 val = sdp->sd_tune.gt_quota_quantum; 1320 if (val != 60) 1321 seq_printf(s, ",quota_quantum=%d", val); 1322 if (args->ar_statfs_percent) 1323 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); 1324 if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1325 const char *state; 1326 1327 switch (args->ar_errors) { 1328 case GFS2_ERRORS_WITHDRAW: 1329 state = "withdraw"; 1330 break; 1331 case GFS2_ERRORS_PANIC: 1332 state = "panic"; 1333 break; 1334 default: 1335 state = "unknown"; 1336 break; 1337 } 1338 seq_printf(s, ",errors=%s", state); 1339 } 1340 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) 1341 seq_printf(s, ",nobarrier"); 1342 1343 return 0; 1344 } 1345 1346 /* 1347 * We have to (at the moment) hold the inodes main lock to cover 1348 * the gap between unlocking the shared lock on the iopen lock and 1349 * taking the exclusive lock. I'd rather do a shared -> exclusive 1350 * conversion on the iopen lock, but we can change that later. This 1351 * is safe, just less efficient. 1352 */ 1353 1354 static void gfs2_delete_inode(struct inode *inode) 1355 { 1356 struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; 1357 struct gfs2_inode *ip = GFS2_I(inode); 1358 struct gfs2_holder gh; 1359 int error; 1360 1361 if (!test_bit(GIF_USER, &ip->i_flags)) 1362 goto out; 1363 1364 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 1365 if (unlikely(error)) { 1366 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1367 goto out; 1368 } 1369 1370 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 1371 if (error) 1372 goto out_truncate; 1373 1374 gfs2_glock_dq_wait(&ip->i_iopen_gh); 1375 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); 1376 error = gfs2_glock_nq(&ip->i_iopen_gh); 1377 if (error) 1378 goto out_truncate; 1379 1380 if (S_ISDIR(inode->i_mode) && 1381 (ip->i_diskflags & GFS2_DIF_EXHASH)) { 1382 error = gfs2_dir_exhash_dealloc(ip); 1383 if (error) 1384 goto out_unlock; 1385 } 1386 1387 if (ip->i_eattr) { 1388 error = gfs2_ea_dealloc(ip); 1389 if (error) 1390 goto out_unlock; 1391 } 1392 1393 if (!gfs2_is_stuffed(ip)) { 1394 error = gfs2_file_dealloc(ip); 1395 if (error) 1396 goto out_unlock; 1397 } 1398 1399 error = gfs2_dinode_dealloc(ip); 1400 if (error) 1401 goto out_unlock; 1402 1403 out_truncate: 1404 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 1405 if (error) 1406 goto out_unlock; 1407 /* Needs to be done before glock release & also in a transaction */ 1408 truncate_inode_pages(&inode->i_data, 0); 1409 gfs2_trans_end(sdp); 1410 1411 out_unlock: 1412 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) 1413 gfs2_glock_dq(&ip->i_iopen_gh); 1414 gfs2_holder_uninit(&ip->i_iopen_gh); 1415 gfs2_glock_dq_uninit(&gh); 1416 if (error && error != GLR_TRYFAILED && error != -EROFS) 1417 fs_warn(sdp, "gfs2_delete_inode: %d\n", error); 1418 out: 1419 truncate_inode_pages(&inode->i_data, 0); 1420 clear_inode(inode); 1421 } 1422 1423 static struct inode *gfs2_alloc_inode(struct super_block *sb) 1424 { 1425 struct gfs2_inode *ip; 1426 1427 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); 1428 if (ip) { 1429 ip->i_flags = 0; 1430 ip->i_gl = NULL; 1431 } 1432 return &ip->i_inode; 1433 } 1434 1435 static void gfs2_destroy_inode(struct inode *inode) 1436 { 1437 kmem_cache_free(gfs2_inode_cachep, inode); 1438 } 1439 1440 const struct super_operations gfs2_super_ops = { 1441 .alloc_inode = gfs2_alloc_inode, 1442 .destroy_inode = gfs2_destroy_inode, 1443 .write_inode = gfs2_write_inode, 1444 .delete_inode = gfs2_delete_inode, 1445 .put_super = gfs2_put_super, 1446 .sync_fs = gfs2_sync_fs, 1447 .freeze_fs = gfs2_freeze, 1448 .unfreeze_fs = gfs2_unfreeze, 1449 .statfs = gfs2_statfs, 1450 .remount_fs = gfs2_remount_fs, 1451 .clear_inode = gfs2_clear_inode, 1452 .drop_inode = gfs2_drop_inode, 1453 .show_options = gfs2_show_options, 1454 }; 1455 1456