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 25 #include "gfs2.h" 26 #include "incore.h" 27 #include "bmap.h" 28 #include "dir.h" 29 #include "glock.h" 30 #include "glops.h" 31 #include "inode.h" 32 #include "log.h" 33 #include "meta_io.h" 34 #include "quota.h" 35 #include "recovery.h" 36 #include "rgrp.h" 37 #include "super.h" 38 #include "trans.h" 39 #include "util.h" 40 #include "sys.h" 41 #include "xattr.h" 42 43 #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) 44 45 enum { 46 Opt_lockproto, 47 Opt_locktable, 48 Opt_hostdata, 49 Opt_spectator, 50 Opt_ignore_local_fs, 51 Opt_localflocks, 52 Opt_localcaching, 53 Opt_debug, 54 Opt_nodebug, 55 Opt_upgrade, 56 Opt_acl, 57 Opt_noacl, 58 Opt_quota_off, 59 Opt_quota_account, 60 Opt_quota_on, 61 Opt_quota, 62 Opt_noquota, 63 Opt_suiddir, 64 Opt_nosuiddir, 65 Opt_data_writeback, 66 Opt_data_ordered, 67 Opt_meta, 68 Opt_discard, 69 Opt_nodiscard, 70 Opt_commit, 71 Opt_err_withdraw, 72 Opt_err_panic, 73 Opt_statfs_quantum, 74 Opt_statfs_percent, 75 Opt_quota_quantum, 76 Opt_barrier, 77 Opt_nobarrier, 78 Opt_error, 79 }; 80 81 static const match_table_t tokens = { 82 {Opt_lockproto, "lockproto=%s"}, 83 {Opt_locktable, "locktable=%s"}, 84 {Opt_hostdata, "hostdata=%s"}, 85 {Opt_spectator, "spectator"}, 86 {Opt_ignore_local_fs, "ignore_local_fs"}, 87 {Opt_localflocks, "localflocks"}, 88 {Opt_localcaching, "localcaching"}, 89 {Opt_debug, "debug"}, 90 {Opt_nodebug, "nodebug"}, 91 {Opt_upgrade, "upgrade"}, 92 {Opt_acl, "acl"}, 93 {Opt_noacl, "noacl"}, 94 {Opt_quota_off, "quota=off"}, 95 {Opt_quota_account, "quota=account"}, 96 {Opt_quota_on, "quota=on"}, 97 {Opt_quota, "quota"}, 98 {Opt_noquota, "noquota"}, 99 {Opt_suiddir, "suiddir"}, 100 {Opt_nosuiddir, "nosuiddir"}, 101 {Opt_data_writeback, "data=writeback"}, 102 {Opt_data_ordered, "data=ordered"}, 103 {Opt_meta, "meta"}, 104 {Opt_discard, "discard"}, 105 {Opt_nodiscard, "nodiscard"}, 106 {Opt_commit, "commit=%d"}, 107 {Opt_err_withdraw, "errors=withdraw"}, 108 {Opt_err_panic, "errors=panic"}, 109 {Opt_statfs_quantum, "statfs_quantum=%d"}, 110 {Opt_statfs_percent, "statfs_percent=%d"}, 111 {Opt_quota_quantum, "quota_quantum=%d"}, 112 {Opt_barrier, "barrier"}, 113 {Opt_nobarrier, "nobarrier"}, 114 {Opt_error, NULL} 115 }; 116 117 /** 118 * gfs2_mount_args - Parse mount options 119 * @args: The structure into which the parsed options will be written 120 * @options: The options to parse 121 * 122 * Return: errno 123 */ 124 125 int gfs2_mount_args(struct gfs2_args *args, char *options) 126 { 127 char *o; 128 int token; 129 substring_t tmp[MAX_OPT_ARGS]; 130 int rv; 131 132 /* Split the options into tokens with the "," character and 133 process them */ 134 135 while (1) { 136 o = strsep(&options, ","); 137 if (o == NULL) 138 break; 139 if (*o == '\0') 140 continue; 141 142 token = match_token(o, tokens, tmp); 143 switch (token) { 144 case Opt_lockproto: 145 match_strlcpy(args->ar_lockproto, &tmp[0], 146 GFS2_LOCKNAME_LEN); 147 break; 148 case Opt_locktable: 149 match_strlcpy(args->ar_locktable, &tmp[0], 150 GFS2_LOCKNAME_LEN); 151 break; 152 case Opt_hostdata: 153 match_strlcpy(args->ar_hostdata, &tmp[0], 154 GFS2_LOCKNAME_LEN); 155 break; 156 case Opt_spectator: 157 args->ar_spectator = 1; 158 break; 159 case Opt_ignore_local_fs: 160 args->ar_ignore_local_fs = 1; 161 break; 162 case Opt_localflocks: 163 args->ar_localflocks = 1; 164 break; 165 case Opt_localcaching: 166 args->ar_localcaching = 1; 167 break; 168 case Opt_debug: 169 if (args->ar_errors == GFS2_ERRORS_PANIC) { 170 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 171 "are mutually exclusive.\n"); 172 return -EINVAL; 173 } 174 args->ar_debug = 1; 175 break; 176 case Opt_nodebug: 177 args->ar_debug = 0; 178 break; 179 case Opt_upgrade: 180 args->ar_upgrade = 1; 181 break; 182 case Opt_acl: 183 args->ar_posix_acl = 1; 184 break; 185 case Opt_noacl: 186 args->ar_posix_acl = 0; 187 break; 188 case Opt_quota_off: 189 case Opt_noquota: 190 args->ar_quota = GFS2_QUOTA_OFF; 191 break; 192 case Opt_quota_account: 193 args->ar_quota = GFS2_QUOTA_ACCOUNT; 194 break; 195 case Opt_quota_on: 196 case Opt_quota: 197 args->ar_quota = GFS2_QUOTA_ON; 198 break; 199 case Opt_suiddir: 200 args->ar_suiddir = 1; 201 break; 202 case Opt_nosuiddir: 203 args->ar_suiddir = 0; 204 break; 205 case Opt_data_writeback: 206 args->ar_data = GFS2_DATA_WRITEBACK; 207 break; 208 case Opt_data_ordered: 209 args->ar_data = GFS2_DATA_ORDERED; 210 break; 211 case Opt_meta: 212 args->ar_meta = 1; 213 break; 214 case Opt_discard: 215 args->ar_discard = 1; 216 break; 217 case Opt_nodiscard: 218 args->ar_discard = 0; 219 break; 220 case Opt_commit: 221 rv = match_int(&tmp[0], &args->ar_commit); 222 if (rv || args->ar_commit <= 0) { 223 printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n"); 224 return rv ? rv : -EINVAL; 225 } 226 break; 227 case Opt_statfs_quantum: 228 rv = match_int(&tmp[0], &args->ar_statfs_quantum); 229 if (rv || args->ar_statfs_quantum < 0) { 230 printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n"); 231 return rv ? rv : -EINVAL; 232 } 233 break; 234 case Opt_quota_quantum: 235 rv = match_int(&tmp[0], &args->ar_quota_quantum); 236 if (rv || args->ar_quota_quantum <= 0) { 237 printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n"); 238 return rv ? rv : -EINVAL; 239 } 240 break; 241 case Opt_statfs_percent: 242 rv = match_int(&tmp[0], &args->ar_statfs_percent); 243 if (rv || args->ar_statfs_percent < 0 || 244 args->ar_statfs_percent > 100) { 245 printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n"); 246 return rv ? rv : -EINVAL; 247 } 248 break; 249 case Opt_err_withdraw: 250 args->ar_errors = GFS2_ERRORS_WITHDRAW; 251 break; 252 case Opt_err_panic: 253 if (args->ar_debug) { 254 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 255 "are mutually exclusive.\n"); 256 return -EINVAL; 257 } 258 args->ar_errors = GFS2_ERRORS_PANIC; 259 break; 260 case Opt_barrier: 261 args->ar_nobarrier = 0; 262 break; 263 case Opt_nobarrier: 264 args->ar_nobarrier = 1; 265 break; 266 case Opt_error: 267 default: 268 printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o); 269 return -EINVAL; 270 } 271 } 272 273 return 0; 274 } 275 276 /** 277 * gfs2_jindex_free - Clear all the journal index information 278 * @sdp: The GFS2 superblock 279 * 280 */ 281 282 void gfs2_jindex_free(struct gfs2_sbd *sdp) 283 { 284 struct list_head list, *head; 285 struct gfs2_jdesc *jd; 286 struct gfs2_journal_extent *jext; 287 288 spin_lock(&sdp->sd_jindex_spin); 289 list_add(&list, &sdp->sd_jindex_list); 290 list_del_init(&sdp->sd_jindex_list); 291 sdp->sd_journals = 0; 292 spin_unlock(&sdp->sd_jindex_spin); 293 294 while (!list_empty(&list)) { 295 jd = list_entry(list.next, struct gfs2_jdesc, jd_list); 296 head = &jd->extent_list; 297 while (!list_empty(head)) { 298 jext = list_entry(head->next, 299 struct gfs2_journal_extent, 300 extent_list); 301 list_del(&jext->extent_list); 302 kfree(jext); 303 } 304 list_del(&jd->jd_list); 305 iput(jd->jd_inode); 306 kfree(jd); 307 } 308 } 309 310 static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) 311 { 312 struct gfs2_jdesc *jd; 313 int found = 0; 314 315 list_for_each_entry(jd, head, jd_list) { 316 if (jd->jd_jid == jid) { 317 found = 1; 318 break; 319 } 320 } 321 322 if (!found) 323 jd = NULL; 324 325 return jd; 326 } 327 328 struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) 329 { 330 struct gfs2_jdesc *jd; 331 332 spin_lock(&sdp->sd_jindex_spin); 333 jd = jdesc_find_i(&sdp->sd_jindex_list, jid); 334 spin_unlock(&sdp->sd_jindex_spin); 335 336 return jd; 337 } 338 339 int gfs2_jdesc_check(struct gfs2_jdesc *jd) 340 { 341 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 342 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 343 int ar; 344 int error; 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 error = gfs2_write_alloc_required(ip, 0, ip->i_disksize, &ar); 354 if (!error && ar) { 355 gfs2_consist_inode(ip); 356 error = -EIO; 357 } 358 359 return error; 360 } 361 362 /** 363 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one 364 * @sdp: the filesystem 365 * 366 * Returns: errno 367 */ 368 369 int gfs2_make_fs_rw(struct gfs2_sbd *sdp) 370 { 371 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); 372 struct gfs2_glock *j_gl = ip->i_gl; 373 struct gfs2_holder t_gh; 374 struct gfs2_log_header_host head; 375 int error; 376 377 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); 378 if (error) 379 return error; 380 381 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); 382 383 error = gfs2_find_jhead(sdp->sd_jdesc, &head); 384 if (error) 385 goto fail; 386 387 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 388 gfs2_consist(sdp); 389 error = -EIO; 390 goto fail; 391 } 392 393 /* Initialize some head of the log stuff */ 394 sdp->sd_log_sequence = head.lh_sequence + 1; 395 gfs2_log_pointers_init(sdp, head.lh_blkno); 396 397 error = gfs2_quota_init(sdp); 398 if (error) 399 goto fail; 400 401 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 402 403 gfs2_glock_dq_uninit(&t_gh); 404 405 return 0; 406 407 fail: 408 t_gh.gh_flags |= GL_NOCACHE; 409 gfs2_glock_dq_uninit(&t_gh); 410 411 return error; 412 } 413 414 void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) 415 { 416 const struct gfs2_statfs_change *str = buf; 417 418 sc->sc_total = be64_to_cpu(str->sc_total); 419 sc->sc_free = be64_to_cpu(str->sc_free); 420 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); 421 } 422 423 static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) 424 { 425 struct gfs2_statfs_change *str = buf; 426 427 str->sc_total = cpu_to_be64(sc->sc_total); 428 str->sc_free = cpu_to_be64(sc->sc_free); 429 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); 430 } 431 432 int gfs2_statfs_init(struct gfs2_sbd *sdp) 433 { 434 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 435 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 436 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 437 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 438 struct buffer_head *m_bh, *l_bh; 439 struct gfs2_holder gh; 440 int error; 441 442 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 443 &gh); 444 if (error) 445 return error; 446 447 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 448 if (error) 449 goto out; 450 451 if (sdp->sd_args.ar_spectator) { 452 spin_lock(&sdp->sd_statfs_spin); 453 gfs2_statfs_change_in(m_sc, m_bh->b_data + 454 sizeof(struct gfs2_dinode)); 455 spin_unlock(&sdp->sd_statfs_spin); 456 } else { 457 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 458 if (error) 459 goto out_m_bh; 460 461 spin_lock(&sdp->sd_statfs_spin); 462 gfs2_statfs_change_in(m_sc, m_bh->b_data + 463 sizeof(struct gfs2_dinode)); 464 gfs2_statfs_change_in(l_sc, l_bh->b_data + 465 sizeof(struct gfs2_dinode)); 466 spin_unlock(&sdp->sd_statfs_spin); 467 468 brelse(l_bh); 469 } 470 471 out_m_bh: 472 brelse(m_bh); 473 out: 474 gfs2_glock_dq_uninit(&gh); 475 return 0; 476 } 477 478 void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, 479 s64 dinodes) 480 { 481 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 482 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 483 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 484 struct buffer_head *l_bh; 485 s64 x, y; 486 int need_sync = 0; 487 int error; 488 489 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 490 if (error) 491 return; 492 493 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 494 495 spin_lock(&sdp->sd_statfs_spin); 496 l_sc->sc_total += total; 497 l_sc->sc_free += free; 498 l_sc->sc_dinodes += dinodes; 499 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); 500 if (sdp->sd_args.ar_statfs_percent) { 501 x = 100 * l_sc->sc_free; 502 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; 503 if (x >= y || x <= -y) 504 need_sync = 1; 505 } 506 spin_unlock(&sdp->sd_statfs_spin); 507 508 brelse(l_bh); 509 if (need_sync) 510 gfs2_wake_up_statfs(sdp); 511 } 512 513 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, 514 struct buffer_head *l_bh) 515 { 516 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 517 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 518 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 519 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 520 521 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 522 523 spin_lock(&sdp->sd_statfs_spin); 524 m_sc->sc_total += l_sc->sc_total; 525 m_sc->sc_free += l_sc->sc_free; 526 m_sc->sc_dinodes += l_sc->sc_dinodes; 527 memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); 528 memset(l_bh->b_data + sizeof(struct gfs2_dinode), 529 0, sizeof(struct gfs2_statfs_change)); 530 spin_unlock(&sdp->sd_statfs_spin); 531 532 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); 533 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); 534 } 535 536 int gfs2_statfs_sync(struct super_block *sb, int type) 537 { 538 struct gfs2_sbd *sdp = sb->s_fs_info; 539 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 540 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 541 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 542 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 543 struct gfs2_holder gh; 544 struct buffer_head *m_bh, *l_bh; 545 int error; 546 547 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 548 &gh); 549 if (error) 550 return error; 551 552 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 553 if (error) 554 goto out; 555 556 spin_lock(&sdp->sd_statfs_spin); 557 gfs2_statfs_change_in(m_sc, m_bh->b_data + 558 sizeof(struct gfs2_dinode)); 559 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { 560 spin_unlock(&sdp->sd_statfs_spin); 561 goto out_bh; 562 } 563 spin_unlock(&sdp->sd_statfs_spin); 564 565 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 566 if (error) 567 goto out_bh; 568 569 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); 570 if (error) 571 goto out_bh2; 572 573 update_statfs(sdp, m_bh, l_bh); 574 sdp->sd_statfs_force_sync = 0; 575 576 gfs2_trans_end(sdp); 577 578 out_bh2: 579 brelse(l_bh); 580 out_bh: 581 brelse(m_bh); 582 out: 583 gfs2_glock_dq_uninit(&gh); 584 return error; 585 } 586 587 struct lfcc { 588 struct list_head list; 589 struct gfs2_holder gh; 590 }; 591 592 /** 593 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all 594 * journals are clean 595 * @sdp: the file system 596 * @state: the state to put the transaction lock into 597 * @t_gh: the hold on the transaction lock 598 * 599 * Returns: errno 600 */ 601 602 static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, 603 struct gfs2_holder *t_gh) 604 { 605 struct gfs2_inode *ip; 606 struct gfs2_jdesc *jd; 607 struct lfcc *lfcc; 608 LIST_HEAD(list); 609 struct gfs2_log_header_host lh; 610 int error; 611 612 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 613 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); 614 if (!lfcc) { 615 error = -ENOMEM; 616 goto out; 617 } 618 ip = GFS2_I(jd->jd_inode); 619 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); 620 if (error) { 621 kfree(lfcc); 622 goto out; 623 } 624 list_add(&lfcc->list, &list); 625 } 626 627 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, 628 GL_NOCACHE, t_gh); 629 630 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 631 error = gfs2_jdesc_check(jd); 632 if (error) 633 break; 634 error = gfs2_find_jhead(jd, &lh); 635 if (error) 636 break; 637 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 638 error = -EBUSY; 639 break; 640 } 641 } 642 643 if (error) 644 gfs2_glock_dq_uninit(t_gh); 645 646 out: 647 while (!list_empty(&list)) { 648 lfcc = list_entry(list.next, struct lfcc, list); 649 list_del(&lfcc->list); 650 gfs2_glock_dq_uninit(&lfcc->gh); 651 kfree(lfcc); 652 } 653 return error; 654 } 655 656 /** 657 * gfs2_freeze_fs - freezes the file system 658 * @sdp: the file system 659 * 660 * This function flushes data and meta data for all machines by 661 * aquiring the transaction log exclusively. All journals are 662 * ensured to be in a clean state as well. 663 * 664 * Returns: errno 665 */ 666 667 int gfs2_freeze_fs(struct gfs2_sbd *sdp) 668 { 669 int error = 0; 670 671 mutex_lock(&sdp->sd_freeze_lock); 672 673 if (!sdp->sd_freeze_count++) { 674 error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); 675 if (error) 676 sdp->sd_freeze_count--; 677 } 678 679 mutex_unlock(&sdp->sd_freeze_lock); 680 681 return error; 682 } 683 684 /** 685 * gfs2_unfreeze_fs - unfreezes the file system 686 * @sdp: the file system 687 * 688 * This function allows the file system to proceed by unlocking 689 * the exclusively held transaction lock. Other GFS2 nodes are 690 * now free to acquire the lock shared and go on with their lives. 691 * 692 */ 693 694 void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) 695 { 696 mutex_lock(&sdp->sd_freeze_lock); 697 698 if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) 699 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 700 701 mutex_unlock(&sdp->sd_freeze_lock); 702 } 703 704 705 /** 706 * gfs2_write_inode - Make sure the inode is stable on the disk 707 * @inode: The inode 708 * @sync: synchronous write flag 709 * 710 * Returns: errno 711 */ 712 713 static int gfs2_write_inode(struct inode *inode, int sync) 714 { 715 struct gfs2_inode *ip = GFS2_I(inode); 716 struct gfs2_sbd *sdp = GFS2_SB(inode); 717 struct gfs2_holder gh; 718 struct buffer_head *bh; 719 struct timespec atime; 720 struct gfs2_dinode *di; 721 int ret = 0; 722 723 /* Check this is a "normal" inode, etc */ 724 if (!test_bit(GIF_USER, &ip->i_flags) || 725 (current->flags & PF_MEMALLOC)) 726 return 0; 727 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 728 if (ret) 729 goto do_flush; 730 ret = gfs2_trans_begin(sdp, RES_DINODE, 0); 731 if (ret) 732 goto do_unlock; 733 ret = gfs2_meta_inode_buffer(ip, &bh); 734 if (ret == 0) { 735 di = (struct gfs2_dinode *)bh->b_data; 736 atime.tv_sec = be64_to_cpu(di->di_atime); 737 atime.tv_nsec = be32_to_cpu(di->di_atime_nsec); 738 if (timespec_compare(&inode->i_atime, &atime) > 0) { 739 gfs2_trans_add_bh(ip->i_gl, bh, 1); 740 gfs2_dinode_out(ip, bh->b_data); 741 } 742 brelse(bh); 743 } 744 gfs2_trans_end(sdp); 745 do_unlock: 746 gfs2_glock_dq_uninit(&gh); 747 do_flush: 748 if (sync != 0) 749 gfs2_log_flush(GFS2_SB(inode), ip->i_gl); 750 return ret; 751 } 752 753 /** 754 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one 755 * @sdp: the filesystem 756 * 757 * Returns: errno 758 */ 759 760 static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) 761 { 762 struct gfs2_holder t_gh; 763 int error; 764 765 flush_workqueue(gfs2_delete_workqueue); 766 gfs2_quota_sync(sdp->sd_vfs, 0); 767 gfs2_statfs_sync(sdp->sd_vfs, 0); 768 769 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, 770 &t_gh); 771 if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 772 return error; 773 774 gfs2_meta_syncfs(sdp); 775 gfs2_log_shutdown(sdp); 776 777 clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 778 779 if (t_gh.gh_gl) 780 gfs2_glock_dq_uninit(&t_gh); 781 782 gfs2_quota_cleanup(sdp); 783 784 return error; 785 } 786 787 static int gfs2_umount_recovery_wait(void *word) 788 { 789 schedule(); 790 return 0; 791 } 792 793 /** 794 * gfs2_put_super - Unmount the filesystem 795 * @sb: The VFS superblock 796 * 797 */ 798 799 static void gfs2_put_super(struct super_block *sb) 800 { 801 struct gfs2_sbd *sdp = sb->s_fs_info; 802 int error; 803 struct gfs2_jdesc *jd; 804 805 /* Unfreeze the filesystem, if we need to */ 806 807 mutex_lock(&sdp->sd_freeze_lock); 808 if (sdp->sd_freeze_count) 809 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 810 mutex_unlock(&sdp->sd_freeze_lock); 811 812 /* No more recovery requests */ 813 set_bit(SDF_NORECOVERY, &sdp->sd_flags); 814 smp_mb(); 815 816 /* Wait on outstanding recovery */ 817 restart: 818 spin_lock(&sdp->sd_jindex_spin); 819 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 820 if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) 821 continue; 822 spin_unlock(&sdp->sd_jindex_spin); 823 wait_on_bit(&jd->jd_flags, JDF_RECOVERY, 824 gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE); 825 goto restart; 826 } 827 spin_unlock(&sdp->sd_jindex_spin); 828 829 kthread_stop(sdp->sd_quotad_process); 830 kthread_stop(sdp->sd_logd_process); 831 832 if (!(sb->s_flags & MS_RDONLY)) { 833 error = gfs2_make_fs_ro(sdp); 834 if (error) 835 gfs2_io_error(sdp); 836 } 837 /* At this point, we're through modifying the disk */ 838 839 /* Release stuff */ 840 841 iput(sdp->sd_jindex); 842 iput(sdp->sd_statfs_inode); 843 iput(sdp->sd_rindex); 844 iput(sdp->sd_quota_inode); 845 846 gfs2_glock_put(sdp->sd_rename_gl); 847 gfs2_glock_put(sdp->sd_trans_gl); 848 849 if (!sdp->sd_args.ar_spectator) { 850 gfs2_glock_dq_uninit(&sdp->sd_journal_gh); 851 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); 852 gfs2_glock_dq_uninit(&sdp->sd_sc_gh); 853 gfs2_glock_dq_uninit(&sdp->sd_qc_gh); 854 iput(sdp->sd_sc_inode); 855 iput(sdp->sd_qc_inode); 856 } 857 858 gfs2_glock_dq_uninit(&sdp->sd_live_gh); 859 gfs2_clear_rgrpd(sdp); 860 gfs2_jindex_free(sdp); 861 /* Take apart glock structures and buffer lists */ 862 gfs2_gl_hash_clear(sdp); 863 /* Unmount the locking protocol */ 864 gfs2_lm_unmount(sdp); 865 866 /* At this point, we're through participating in the lockspace */ 867 gfs2_sys_fs_del(sdp); 868 } 869 870 /** 871 * gfs2_sync_fs - sync the filesystem 872 * @sb: the superblock 873 * 874 * Flushes the log to disk. 875 */ 876 877 static int gfs2_sync_fs(struct super_block *sb, int wait) 878 { 879 if (wait && sb->s_fs_info) 880 gfs2_log_flush(sb->s_fs_info, NULL); 881 return 0; 882 } 883 884 /** 885 * gfs2_freeze - prevent further writes to the filesystem 886 * @sb: the VFS structure for the filesystem 887 * 888 */ 889 890 static int gfs2_freeze(struct super_block *sb) 891 { 892 struct gfs2_sbd *sdp = sb->s_fs_info; 893 int error; 894 895 if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 896 return -EINVAL; 897 898 for (;;) { 899 error = gfs2_freeze_fs(sdp); 900 if (!error) 901 break; 902 903 switch (error) { 904 case -EBUSY: 905 fs_err(sdp, "waiting for recovery before freeze\n"); 906 break; 907 908 default: 909 fs_err(sdp, "error freezing FS: %d\n", error); 910 break; 911 } 912 913 fs_err(sdp, "retrying...\n"); 914 msleep(1000); 915 } 916 return 0; 917 } 918 919 /** 920 * gfs2_unfreeze - reallow writes to the filesystem 921 * @sb: the VFS structure for the filesystem 922 * 923 */ 924 925 static int gfs2_unfreeze(struct super_block *sb) 926 { 927 gfs2_unfreeze_fs(sb->s_fs_info); 928 return 0; 929 } 930 931 /** 932 * statfs_fill - fill in the sg for a given RG 933 * @rgd: the RG 934 * @sc: the sc structure 935 * 936 * Returns: 0 on success, -ESTALE if the LVB is invalid 937 */ 938 939 static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 940 struct gfs2_statfs_change_host *sc) 941 { 942 gfs2_rgrp_verify(rgd); 943 sc->sc_total += rgd->rd_data; 944 sc->sc_free += rgd->rd_free; 945 sc->sc_dinodes += rgd->rd_dinodes; 946 return 0; 947 } 948 949 /** 950 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 951 * @sdp: the filesystem 952 * @sc: the sc info that will be returned 953 * 954 * Any error (other than a signal) will cause this routine to fall back 955 * to the synchronous version. 956 * 957 * FIXME: This really shouldn't busy wait like this. 958 * 959 * Returns: errno 960 */ 961 962 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 963 { 964 struct gfs2_holder ri_gh; 965 struct gfs2_rgrpd *rgd_next; 966 struct gfs2_holder *gha, *gh; 967 unsigned int slots = 64; 968 unsigned int x; 969 int done; 970 int error = 0, err; 971 972 memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 973 gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 974 if (!gha) 975 return -ENOMEM; 976 977 error = gfs2_rindex_hold(sdp, &ri_gh); 978 if (error) 979 goto out; 980 981 rgd_next = gfs2_rgrpd_get_first(sdp); 982 983 for (;;) { 984 done = 1; 985 986 for (x = 0; x < slots; x++) { 987 gh = gha + x; 988 989 if (gh->gh_gl && gfs2_glock_poll(gh)) { 990 err = gfs2_glock_wait(gh); 991 if (err) { 992 gfs2_holder_uninit(gh); 993 error = err; 994 } else { 995 if (!error) 996 error = statfs_slow_fill( 997 gh->gh_gl->gl_object, sc); 998 gfs2_glock_dq_uninit(gh); 999 } 1000 } 1001 1002 if (gh->gh_gl) 1003 done = 0; 1004 else if (rgd_next && !error) { 1005 error = gfs2_glock_nq_init(rgd_next->rd_gl, 1006 LM_ST_SHARED, 1007 GL_ASYNC, 1008 gh); 1009 rgd_next = gfs2_rgrpd_get_next(rgd_next); 1010 done = 0; 1011 } 1012 1013 if (signal_pending(current)) 1014 error = -ERESTARTSYS; 1015 } 1016 1017 if (done) 1018 break; 1019 1020 yield(); 1021 } 1022 1023 gfs2_glock_dq_uninit(&ri_gh); 1024 1025 out: 1026 kfree(gha); 1027 return error; 1028 } 1029 1030 /** 1031 * gfs2_statfs_i - Do a statfs 1032 * @sdp: the filesystem 1033 * @sg: the sg structure 1034 * 1035 * Returns: errno 1036 */ 1037 1038 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 1039 { 1040 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 1041 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 1042 1043 spin_lock(&sdp->sd_statfs_spin); 1044 1045 *sc = *m_sc; 1046 sc->sc_total += l_sc->sc_total; 1047 sc->sc_free += l_sc->sc_free; 1048 sc->sc_dinodes += l_sc->sc_dinodes; 1049 1050 spin_unlock(&sdp->sd_statfs_spin); 1051 1052 if (sc->sc_free < 0) 1053 sc->sc_free = 0; 1054 if (sc->sc_free > sc->sc_total) 1055 sc->sc_free = sc->sc_total; 1056 if (sc->sc_dinodes < 0) 1057 sc->sc_dinodes = 0; 1058 1059 return 0; 1060 } 1061 1062 /** 1063 * gfs2_statfs - Gather and return stats about the filesystem 1064 * @sb: The superblock 1065 * @statfsbuf: The buffer 1066 * 1067 * Returns: 0 on success or error code 1068 */ 1069 1070 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1071 { 1072 struct super_block *sb = dentry->d_inode->i_sb; 1073 struct gfs2_sbd *sdp = sb->s_fs_info; 1074 struct gfs2_statfs_change_host sc; 1075 int error; 1076 1077 if (gfs2_tune_get(sdp, gt_statfs_slow)) 1078 error = gfs2_statfs_slow(sdp, &sc); 1079 else 1080 error = gfs2_statfs_i(sdp, &sc); 1081 1082 if (error) 1083 return error; 1084 1085 buf->f_type = GFS2_MAGIC; 1086 buf->f_bsize = sdp->sd_sb.sb_bsize; 1087 buf->f_blocks = sc.sc_total; 1088 buf->f_bfree = sc.sc_free; 1089 buf->f_bavail = sc.sc_free; 1090 buf->f_files = sc.sc_dinodes + sc.sc_free; 1091 buf->f_ffree = sc.sc_free; 1092 buf->f_namelen = GFS2_FNAMESIZE; 1093 1094 return 0; 1095 } 1096 1097 /** 1098 * gfs2_remount_fs - called when the FS is remounted 1099 * @sb: the filesystem 1100 * @flags: the remount flags 1101 * @data: extra data passed in (not used right now) 1102 * 1103 * Returns: errno 1104 */ 1105 1106 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) 1107 { 1108 struct gfs2_sbd *sdp = sb->s_fs_info; 1109 struct gfs2_args args = sdp->sd_args; /* Default to current settings */ 1110 struct gfs2_tune *gt = &sdp->sd_tune; 1111 int error; 1112 1113 spin_lock(>->gt_spin); 1114 args.ar_commit = gt->gt_log_flush_secs; 1115 args.ar_quota_quantum = gt->gt_quota_quantum; 1116 if (gt->gt_statfs_slow) 1117 args.ar_statfs_quantum = 0; 1118 else 1119 args.ar_statfs_quantum = gt->gt_statfs_quantum; 1120 spin_unlock(>->gt_spin); 1121 error = gfs2_mount_args(&args, data); 1122 if (error) 1123 return error; 1124 1125 /* Not allowed to change locking details */ 1126 if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || 1127 strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || 1128 strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) 1129 return -EINVAL; 1130 1131 /* Some flags must not be changed */ 1132 if (args_neq(&args, &sdp->sd_args, spectator) || 1133 args_neq(&args, &sdp->sd_args, ignore_local_fs) || 1134 args_neq(&args, &sdp->sd_args, localflocks) || 1135 args_neq(&args, &sdp->sd_args, localcaching) || 1136 args_neq(&args, &sdp->sd_args, meta)) 1137 return -EINVAL; 1138 1139 if (sdp->sd_args.ar_spectator) 1140 *flags |= MS_RDONLY; 1141 1142 if ((sb->s_flags ^ *flags) & MS_RDONLY) { 1143 if (*flags & MS_RDONLY) 1144 error = gfs2_make_fs_ro(sdp); 1145 else 1146 error = gfs2_make_fs_rw(sdp); 1147 if (error) 1148 return error; 1149 } 1150 1151 sdp->sd_args = args; 1152 if (sdp->sd_args.ar_posix_acl) 1153 sb->s_flags |= MS_POSIXACL; 1154 else 1155 sb->s_flags &= ~MS_POSIXACL; 1156 if (sdp->sd_args.ar_nobarrier) 1157 set_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1158 else 1159 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); 1160 spin_lock(>->gt_spin); 1161 gt->gt_log_flush_secs = args.ar_commit; 1162 gt->gt_quota_quantum = args.ar_quota_quantum; 1163 if (args.ar_statfs_quantum) { 1164 gt->gt_statfs_slow = 0; 1165 gt->gt_statfs_quantum = args.ar_statfs_quantum; 1166 } 1167 else { 1168 gt->gt_statfs_slow = 1; 1169 gt->gt_statfs_quantum = 30; 1170 } 1171 spin_unlock(>->gt_spin); 1172 1173 gfs2_online_uevent(sdp); 1174 return 0; 1175 } 1176 1177 /** 1178 * gfs2_drop_inode - Drop an inode (test for remote unlink) 1179 * @inode: The inode to drop 1180 * 1181 * If we've received a callback on an iopen lock then its because a 1182 * remote node tried to deallocate the inode but failed due to this node 1183 * still having the inode open. Here we mark the link count zero 1184 * since we know that it must have reached zero if the GLF_DEMOTE flag 1185 * is set on the iopen glock. If we didn't do a disk read since the 1186 * remote node removed the final link then we might otherwise miss 1187 * this event. This check ensures that this node will deallocate the 1188 * inode's blocks, or alternatively pass the baton on to another 1189 * node for later deallocation. 1190 */ 1191 1192 static void gfs2_drop_inode(struct inode *inode) 1193 { 1194 struct gfs2_inode *ip = GFS2_I(inode); 1195 1196 if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) { 1197 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1198 if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) 1199 clear_nlink(inode); 1200 } 1201 generic_drop_inode(inode); 1202 } 1203 1204 /** 1205 * gfs2_clear_inode - Deallocate an inode when VFS is done with it 1206 * @inode: The VFS inode 1207 * 1208 */ 1209 1210 static void gfs2_clear_inode(struct inode *inode) 1211 { 1212 struct gfs2_inode *ip = GFS2_I(inode); 1213 1214 /* This tells us its a "real" inode and not one which only 1215 * serves to contain an address space (see rgrp.c, meta_io.c) 1216 * which therefore doesn't have its own glocks. 1217 */ 1218 if (test_bit(GIF_USER, &ip->i_flags)) { 1219 ip->i_gl->gl_object = NULL; 1220 gfs2_glock_put(ip->i_gl); 1221 ip->i_gl = NULL; 1222 if (ip->i_iopen_gh.gh_gl) { 1223 ip->i_iopen_gh.gh_gl->gl_object = NULL; 1224 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1225 } 1226 } 1227 } 1228 1229 static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 1230 { 1231 do { 1232 if (d1 == d2) 1233 return 1; 1234 d1 = d1->d_parent; 1235 } while (!IS_ROOT(d1)); 1236 return 0; 1237 } 1238 1239 /** 1240 * gfs2_show_options - Show mount options for /proc/mounts 1241 * @s: seq_file structure 1242 * @mnt: vfsmount 1243 * 1244 * Returns: 0 on success or error code 1245 */ 1246 1247 static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1248 { 1249 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; 1250 struct gfs2_args *args = &sdp->sd_args; 1251 int val; 1252 1253 if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) 1254 seq_printf(s, ",meta"); 1255 if (args->ar_lockproto[0]) 1256 seq_printf(s, ",lockproto=%s", args->ar_lockproto); 1257 if (args->ar_locktable[0]) 1258 seq_printf(s, ",locktable=%s", args->ar_locktable); 1259 if (args->ar_hostdata[0]) 1260 seq_printf(s, ",hostdata=%s", args->ar_hostdata); 1261 if (args->ar_spectator) 1262 seq_printf(s, ",spectator"); 1263 if (args->ar_ignore_local_fs) 1264 seq_printf(s, ",ignore_local_fs"); 1265 if (args->ar_localflocks) 1266 seq_printf(s, ",localflocks"); 1267 if (args->ar_localcaching) 1268 seq_printf(s, ",localcaching"); 1269 if (args->ar_debug) 1270 seq_printf(s, ",debug"); 1271 if (args->ar_upgrade) 1272 seq_printf(s, ",upgrade"); 1273 if (args->ar_posix_acl) 1274 seq_printf(s, ",acl"); 1275 if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 1276 char *state; 1277 switch (args->ar_quota) { 1278 case GFS2_QUOTA_OFF: 1279 state = "off"; 1280 break; 1281 case GFS2_QUOTA_ACCOUNT: 1282 state = "account"; 1283 break; 1284 case GFS2_QUOTA_ON: 1285 state = "on"; 1286 break; 1287 default: 1288 state = "unknown"; 1289 break; 1290 } 1291 seq_printf(s, ",quota=%s", state); 1292 } 1293 if (args->ar_suiddir) 1294 seq_printf(s, ",suiddir"); 1295 if (args->ar_data != GFS2_DATA_DEFAULT) { 1296 char *state; 1297 switch (args->ar_data) { 1298 case GFS2_DATA_WRITEBACK: 1299 state = "writeback"; 1300 break; 1301 case GFS2_DATA_ORDERED: 1302 state = "ordered"; 1303 break; 1304 default: 1305 state = "unknown"; 1306 break; 1307 } 1308 seq_printf(s, ",data=%s", state); 1309 } 1310 if (args->ar_discard) 1311 seq_printf(s, ",discard"); 1312 val = sdp->sd_tune.gt_log_flush_secs; 1313 if (val != 60) 1314 seq_printf(s, ",commit=%d", val); 1315 val = sdp->sd_tune.gt_statfs_quantum; 1316 if (val != 30) 1317 seq_printf(s, ",statfs_quantum=%d", val); 1318 val = sdp->sd_tune.gt_quota_quantum; 1319 if (val != 60) 1320 seq_printf(s, ",quota_quantum=%d", val); 1321 if (args->ar_statfs_percent) 1322 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); 1323 if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1324 const char *state; 1325 1326 switch (args->ar_errors) { 1327 case GFS2_ERRORS_WITHDRAW: 1328 state = "withdraw"; 1329 break; 1330 case GFS2_ERRORS_PANIC: 1331 state = "panic"; 1332 break; 1333 default: 1334 state = "unknown"; 1335 break; 1336 } 1337 seq_printf(s, ",errors=%s", state); 1338 } 1339 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) 1340 seq_printf(s, ",nobarrier"); 1341 1342 return 0; 1343 } 1344 1345 /* 1346 * We have to (at the moment) hold the inodes main lock to cover 1347 * the gap between unlocking the shared lock on the iopen lock and 1348 * taking the exclusive lock. I'd rather do a shared -> exclusive 1349 * conversion on the iopen lock, but we can change that later. This 1350 * is safe, just less efficient. 1351 */ 1352 1353 static void gfs2_delete_inode(struct inode *inode) 1354 { 1355 struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; 1356 struct gfs2_inode *ip = GFS2_I(inode); 1357 struct gfs2_holder gh; 1358 int error; 1359 1360 if (!test_bit(GIF_USER, &ip->i_flags)) 1361 goto out; 1362 1363 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 1364 if (unlikely(error)) { 1365 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1366 goto out; 1367 } 1368 1369 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 1370 if (error) 1371 goto out_truncate; 1372 1373 gfs2_glock_dq_wait(&ip->i_iopen_gh); 1374 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); 1375 error = gfs2_glock_nq(&ip->i_iopen_gh); 1376 if (error) 1377 goto out_truncate; 1378 1379 if (S_ISDIR(inode->i_mode) && 1380 (ip->i_diskflags & GFS2_DIF_EXHASH)) { 1381 error = gfs2_dir_exhash_dealloc(ip); 1382 if (error) 1383 goto out_unlock; 1384 } 1385 1386 if (ip->i_eattr) { 1387 error = gfs2_ea_dealloc(ip); 1388 if (error) 1389 goto out_unlock; 1390 } 1391 1392 if (!gfs2_is_stuffed(ip)) { 1393 error = gfs2_file_dealloc(ip); 1394 if (error) 1395 goto out_unlock; 1396 } 1397 1398 error = gfs2_dinode_dealloc(ip); 1399 if (error) 1400 goto out_unlock; 1401 1402 out_truncate: 1403 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 1404 if (error) 1405 goto out_unlock; 1406 /* Needs to be done before glock release & also in a transaction */ 1407 truncate_inode_pages(&inode->i_data, 0); 1408 gfs2_trans_end(sdp); 1409 1410 out_unlock: 1411 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) 1412 gfs2_glock_dq(&ip->i_iopen_gh); 1413 gfs2_holder_uninit(&ip->i_iopen_gh); 1414 gfs2_glock_dq_uninit(&gh); 1415 if (error && error != GLR_TRYFAILED && error != -EROFS) 1416 fs_warn(sdp, "gfs2_delete_inode: %d\n", error); 1417 out: 1418 truncate_inode_pages(&inode->i_data, 0); 1419 clear_inode(inode); 1420 } 1421 1422 static struct inode *gfs2_alloc_inode(struct super_block *sb) 1423 { 1424 struct gfs2_inode *ip; 1425 1426 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); 1427 if (ip) { 1428 ip->i_flags = 0; 1429 ip->i_gl = NULL; 1430 } 1431 return &ip->i_inode; 1432 } 1433 1434 static void gfs2_destroy_inode(struct inode *inode) 1435 { 1436 kmem_cache_free(gfs2_inode_cachep, inode); 1437 } 1438 1439 const struct super_operations gfs2_super_ops = { 1440 .alloc_inode = gfs2_alloc_inode, 1441 .destroy_inode = gfs2_destroy_inode, 1442 .write_inode = gfs2_write_inode, 1443 .delete_inode = gfs2_delete_inode, 1444 .put_super = gfs2_put_super, 1445 .sync_fs = gfs2_sync_fs, 1446 .freeze_fs = gfs2_freeze, 1447 .unfreeze_fs = gfs2_unfreeze, 1448 .statfs = gfs2_statfs, 1449 .remount_fs = gfs2_remount_fs, 1450 .clear_inode = gfs2_clear_inode, 1451 .drop_inode = gfs2_drop_inode, 1452 .show_options = gfs2_show_options, 1453 }; 1454 1455