1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. 5 */ 6 7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8 9 #include <linux/bio.h> 10 #include <linux/sched/signal.h> 11 #include <linux/slab.h> 12 #include <linux/spinlock.h> 13 #include <linux/completion.h> 14 #include <linux/buffer_head.h> 15 #include <linux/statfs.h> 16 #include <linux/seq_file.h> 17 #include <linux/mount.h> 18 #include <linux/kthread.h> 19 #include <linux/delay.h> 20 #include <linux/gfs2_ondisk.h> 21 #include <linux/crc32.h> 22 #include <linux/time.h> 23 #include <linux/wait.h> 24 #include <linux/writeback.h> 25 #include <linux/backing-dev.h> 26 #include <linux/kernel.h> 27 28 #include "gfs2.h" 29 #include "incore.h" 30 #include "bmap.h" 31 #include "dir.h" 32 #include "glock.h" 33 #include "glops.h" 34 #include "inode.h" 35 #include "log.h" 36 #include "meta_io.h" 37 #include "quota.h" 38 #include "recovery.h" 39 #include "rgrp.h" 40 #include "super.h" 41 #include "trans.h" 42 #include "util.h" 43 #include "sys.h" 44 #include "xattr.h" 45 #include "lops.h" 46 47 /** 48 * gfs2_jindex_free - Clear all the journal index information 49 * @sdp: The GFS2 superblock 50 * 51 */ 52 53 void gfs2_jindex_free(struct gfs2_sbd *sdp) 54 { 55 struct list_head list; 56 struct gfs2_jdesc *jd; 57 58 spin_lock(&sdp->sd_jindex_spin); 59 list_add(&list, &sdp->sd_jindex_list); 60 list_del_init(&sdp->sd_jindex_list); 61 sdp->sd_journals = 0; 62 spin_unlock(&sdp->sd_jindex_spin); 63 64 while (!list_empty(&list)) { 65 jd = list_entry(list.next, struct gfs2_jdesc, jd_list); 66 gfs2_free_journal_extents(jd); 67 list_del(&jd->jd_list); 68 iput(jd->jd_inode); 69 kfree(jd); 70 } 71 } 72 73 static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) 74 { 75 struct gfs2_jdesc *jd; 76 int found = 0; 77 78 list_for_each_entry(jd, head, jd_list) { 79 if (jd->jd_jid == jid) { 80 found = 1; 81 break; 82 } 83 } 84 85 if (!found) 86 jd = NULL; 87 88 return jd; 89 } 90 91 struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) 92 { 93 struct gfs2_jdesc *jd; 94 95 spin_lock(&sdp->sd_jindex_spin); 96 jd = jdesc_find_i(&sdp->sd_jindex_list, jid); 97 spin_unlock(&sdp->sd_jindex_spin); 98 99 return jd; 100 } 101 102 int gfs2_jdesc_check(struct gfs2_jdesc *jd) 103 { 104 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 105 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 106 u64 size = i_size_read(jd->jd_inode); 107 108 if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30))) 109 return -EIO; 110 111 jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift; 112 113 if (gfs2_write_alloc_required(ip, 0, size)) { 114 gfs2_consist_inode(ip); 115 return -EIO; 116 } 117 118 return 0; 119 } 120 121 static int init_threads(struct gfs2_sbd *sdp) 122 { 123 struct task_struct *p; 124 int error = 0; 125 126 p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); 127 if (IS_ERR(p)) { 128 error = PTR_ERR(p); 129 fs_err(sdp, "can't start logd thread: %d\n", error); 130 return error; 131 } 132 sdp->sd_logd_process = p; 133 134 p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad"); 135 if (IS_ERR(p)) { 136 error = PTR_ERR(p); 137 fs_err(sdp, "can't start quotad thread: %d\n", error); 138 goto fail; 139 } 140 sdp->sd_quotad_process = p; 141 return 0; 142 143 fail: 144 kthread_stop(sdp->sd_logd_process); 145 sdp->sd_logd_process = NULL; 146 return error; 147 } 148 149 /** 150 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one 151 * @sdp: the filesystem 152 * 153 * Returns: errno 154 */ 155 156 int gfs2_make_fs_rw(struct gfs2_sbd *sdp) 157 { 158 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); 159 struct gfs2_glock *j_gl = ip->i_gl; 160 struct gfs2_holder freeze_gh; 161 struct gfs2_log_header_host head; 162 int error; 163 164 error = init_threads(sdp); 165 if (error) 166 return error; 167 168 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, 169 &freeze_gh); 170 if (error) 171 goto fail_threads; 172 173 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); 174 175 error = gfs2_find_jhead(sdp->sd_jdesc, &head, false); 176 if (error) 177 goto fail; 178 179 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 180 gfs2_consist(sdp); 181 error = -EIO; 182 goto fail; 183 } 184 185 /* Initialize some head of the log stuff */ 186 sdp->sd_log_sequence = head.lh_sequence + 1; 187 gfs2_log_pointers_init(sdp, head.lh_blkno); 188 189 error = gfs2_quota_init(sdp); 190 if (error) 191 goto fail; 192 193 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 194 195 gfs2_glock_dq_uninit(&freeze_gh); 196 197 return 0; 198 199 fail: 200 freeze_gh.gh_flags |= GL_NOCACHE; 201 gfs2_glock_dq_uninit(&freeze_gh); 202 fail_threads: 203 if (sdp->sd_quotad_process) 204 kthread_stop(sdp->sd_quotad_process); 205 sdp->sd_quotad_process = NULL; 206 if (sdp->sd_logd_process) 207 kthread_stop(sdp->sd_logd_process); 208 sdp->sd_logd_process = NULL; 209 return error; 210 } 211 212 void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) 213 { 214 const struct gfs2_statfs_change *str = buf; 215 216 sc->sc_total = be64_to_cpu(str->sc_total); 217 sc->sc_free = be64_to_cpu(str->sc_free); 218 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); 219 } 220 221 static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) 222 { 223 struct gfs2_statfs_change *str = buf; 224 225 str->sc_total = cpu_to_be64(sc->sc_total); 226 str->sc_free = cpu_to_be64(sc->sc_free); 227 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); 228 } 229 230 int gfs2_statfs_init(struct gfs2_sbd *sdp) 231 { 232 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 233 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 234 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 235 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 236 struct buffer_head *m_bh, *l_bh; 237 struct gfs2_holder gh; 238 int error; 239 240 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 241 &gh); 242 if (error) 243 return error; 244 245 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 246 if (error) 247 goto out; 248 249 if (sdp->sd_args.ar_spectator) { 250 spin_lock(&sdp->sd_statfs_spin); 251 gfs2_statfs_change_in(m_sc, m_bh->b_data + 252 sizeof(struct gfs2_dinode)); 253 spin_unlock(&sdp->sd_statfs_spin); 254 } else { 255 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 256 if (error) 257 goto out_m_bh; 258 259 spin_lock(&sdp->sd_statfs_spin); 260 gfs2_statfs_change_in(m_sc, m_bh->b_data + 261 sizeof(struct gfs2_dinode)); 262 gfs2_statfs_change_in(l_sc, l_bh->b_data + 263 sizeof(struct gfs2_dinode)); 264 spin_unlock(&sdp->sd_statfs_spin); 265 266 brelse(l_bh); 267 } 268 269 out_m_bh: 270 brelse(m_bh); 271 out: 272 gfs2_glock_dq_uninit(&gh); 273 return 0; 274 } 275 276 void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, 277 s64 dinodes) 278 { 279 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 280 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 281 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 282 struct buffer_head *l_bh; 283 s64 x, y; 284 int need_sync = 0; 285 int error; 286 287 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 288 if (error) 289 return; 290 291 gfs2_trans_add_meta(l_ip->i_gl, l_bh); 292 293 spin_lock(&sdp->sd_statfs_spin); 294 l_sc->sc_total += total; 295 l_sc->sc_free += free; 296 l_sc->sc_dinodes += dinodes; 297 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); 298 if (sdp->sd_args.ar_statfs_percent) { 299 x = 100 * l_sc->sc_free; 300 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; 301 if (x >= y || x <= -y) 302 need_sync = 1; 303 } 304 spin_unlock(&sdp->sd_statfs_spin); 305 306 brelse(l_bh); 307 if (need_sync) 308 gfs2_wake_up_statfs(sdp); 309 } 310 311 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, 312 struct buffer_head *l_bh) 313 { 314 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 315 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 316 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 317 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 318 319 gfs2_trans_add_meta(l_ip->i_gl, l_bh); 320 gfs2_trans_add_meta(m_ip->i_gl, m_bh); 321 322 spin_lock(&sdp->sd_statfs_spin); 323 m_sc->sc_total += l_sc->sc_total; 324 m_sc->sc_free += l_sc->sc_free; 325 m_sc->sc_dinodes += l_sc->sc_dinodes; 326 memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); 327 memset(l_bh->b_data + sizeof(struct gfs2_dinode), 328 0, sizeof(struct gfs2_statfs_change)); 329 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); 330 spin_unlock(&sdp->sd_statfs_spin); 331 } 332 333 int gfs2_statfs_sync(struct super_block *sb, int type) 334 { 335 struct gfs2_sbd *sdp = sb->s_fs_info; 336 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 337 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 338 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 339 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 340 struct gfs2_holder gh; 341 struct buffer_head *m_bh, *l_bh; 342 int error; 343 344 sb_start_write(sb); 345 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 346 &gh); 347 if (error) 348 goto out; 349 350 error = gfs2_meta_inode_buffer(m_ip, &m_bh); 351 if (error) 352 goto out_unlock; 353 354 spin_lock(&sdp->sd_statfs_spin); 355 gfs2_statfs_change_in(m_sc, m_bh->b_data + 356 sizeof(struct gfs2_dinode)); 357 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { 358 spin_unlock(&sdp->sd_statfs_spin); 359 goto out_bh; 360 } 361 spin_unlock(&sdp->sd_statfs_spin); 362 363 error = gfs2_meta_inode_buffer(l_ip, &l_bh); 364 if (error) 365 goto out_bh; 366 367 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); 368 if (error) 369 goto out_bh2; 370 371 update_statfs(sdp, m_bh, l_bh); 372 sdp->sd_statfs_force_sync = 0; 373 374 gfs2_trans_end(sdp); 375 376 out_bh2: 377 brelse(l_bh); 378 out_bh: 379 brelse(m_bh); 380 out_unlock: 381 gfs2_glock_dq_uninit(&gh); 382 out: 383 sb_end_write(sb); 384 return error; 385 } 386 387 struct lfcc { 388 struct list_head list; 389 struct gfs2_holder gh; 390 }; 391 392 /** 393 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all 394 * journals are clean 395 * @sdp: the file system 396 * @state: the state to put the transaction lock into 397 * @t_gh: the hold on the transaction lock 398 * 399 * Returns: errno 400 */ 401 402 static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, 403 struct gfs2_holder *freeze_gh) 404 { 405 struct gfs2_inode *ip; 406 struct gfs2_jdesc *jd; 407 struct lfcc *lfcc; 408 LIST_HEAD(list); 409 struct gfs2_log_header_host lh; 410 int error; 411 412 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 413 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); 414 if (!lfcc) { 415 error = -ENOMEM; 416 goto out; 417 } 418 ip = GFS2_I(jd->jd_inode); 419 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); 420 if (error) { 421 kfree(lfcc); 422 goto out; 423 } 424 list_add(&lfcc->list, &list); 425 } 426 427 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE, 428 GL_NOCACHE, freeze_gh); 429 430 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 431 error = gfs2_jdesc_check(jd); 432 if (error) 433 break; 434 error = gfs2_find_jhead(jd, &lh, false); 435 if (error) 436 break; 437 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 438 error = -EBUSY; 439 break; 440 } 441 } 442 443 if (error) 444 gfs2_glock_dq_uninit(freeze_gh); 445 446 out: 447 while (!list_empty(&list)) { 448 lfcc = list_entry(list.next, struct lfcc, list); 449 list_del(&lfcc->list); 450 gfs2_glock_dq_uninit(&lfcc->gh); 451 kfree(lfcc); 452 } 453 return error; 454 } 455 456 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) 457 { 458 struct gfs2_dinode *str = buf; 459 460 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 461 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); 462 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); 463 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); 464 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); 465 str->di_mode = cpu_to_be32(ip->i_inode.i_mode); 466 str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode)); 467 str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode)); 468 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); 469 str->di_size = cpu_to_be64(i_size_read(&ip->i_inode)); 470 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); 471 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); 472 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); 473 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); 474 475 str->di_goal_meta = cpu_to_be64(ip->i_goal); 476 str->di_goal_data = cpu_to_be64(ip->i_goal); 477 str->di_generation = cpu_to_be64(ip->i_generation); 478 479 str->di_flags = cpu_to_be32(ip->i_diskflags); 480 str->di_height = cpu_to_be16(ip->i_height); 481 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && 482 !(ip->i_diskflags & GFS2_DIF_EXHASH) ? 483 GFS2_FORMAT_DE : 0); 484 str->di_depth = cpu_to_be16(ip->i_depth); 485 str->di_entries = cpu_to_be32(ip->i_entries); 486 487 str->di_eattr = cpu_to_be64(ip->i_eattr); 488 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); 489 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); 490 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); 491 } 492 493 /** 494 * gfs2_write_inode - Make sure the inode is stable on the disk 495 * @inode: The inode 496 * @wbc: The writeback control structure 497 * 498 * Returns: errno 499 */ 500 501 static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) 502 { 503 struct gfs2_inode *ip = GFS2_I(inode); 504 struct gfs2_sbd *sdp = GFS2_SB(inode); 505 struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl); 506 struct backing_dev_info *bdi = inode_to_bdi(metamapping->host); 507 int ret = 0; 508 bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip)); 509 510 if (flush_all) 511 gfs2_log_flush(GFS2_SB(inode), ip->i_gl, 512 GFS2_LOG_HEAD_FLUSH_NORMAL | 513 GFS2_LFC_WRITE_INODE); 514 if (bdi->wb.dirty_exceeded) 515 gfs2_ail1_flush(sdp, wbc); 516 else 517 filemap_fdatawrite(metamapping); 518 if (flush_all) 519 ret = filemap_fdatawait(metamapping); 520 if (ret) 521 mark_inode_dirty_sync(inode); 522 else { 523 spin_lock(&inode->i_lock); 524 if (!(inode->i_flags & I_DIRTY)) 525 gfs2_ordered_del_inode(ip); 526 spin_unlock(&inode->i_lock); 527 } 528 return ret; 529 } 530 531 /** 532 * gfs2_dirty_inode - check for atime updates 533 * @inode: The inode in question 534 * @flags: The type of dirty 535 * 536 * Unfortunately it can be called under any combination of inode 537 * glock and transaction lock, so we have to check carefully. 538 * 539 * At the moment this deals only with atime - it should be possible 540 * to expand that role in future, once a review of the locking has 541 * been carried out. 542 */ 543 544 static void gfs2_dirty_inode(struct inode *inode, int flags) 545 { 546 struct gfs2_inode *ip = GFS2_I(inode); 547 struct gfs2_sbd *sdp = GFS2_SB(inode); 548 struct buffer_head *bh; 549 struct gfs2_holder gh; 550 int need_unlock = 0; 551 int need_endtrans = 0; 552 int ret; 553 554 if (!(flags & I_DIRTY_INODE)) 555 return; 556 if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags))) 557 return; 558 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { 559 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 560 if (ret) { 561 fs_err(sdp, "dirty_inode: glock %d\n", ret); 562 return; 563 } 564 need_unlock = 1; 565 } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) 566 return; 567 568 if (current->journal_info == NULL) { 569 ret = gfs2_trans_begin(sdp, RES_DINODE, 0); 570 if (ret) { 571 fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret); 572 goto out; 573 } 574 need_endtrans = 1; 575 } 576 577 ret = gfs2_meta_inode_buffer(ip, &bh); 578 if (ret == 0) { 579 gfs2_trans_add_meta(ip->i_gl, bh); 580 gfs2_dinode_out(ip, bh->b_data); 581 brelse(bh); 582 } 583 584 if (need_endtrans) 585 gfs2_trans_end(sdp); 586 out: 587 if (need_unlock) 588 gfs2_glock_dq_uninit(&gh); 589 } 590 591 /** 592 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one 593 * @sdp: the filesystem 594 * 595 * Returns: errno 596 */ 597 598 int gfs2_make_fs_ro(struct gfs2_sbd *sdp) 599 { 600 struct gfs2_holder freeze_gh; 601 int error; 602 603 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE, 604 &freeze_gh); 605 if (error && !test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) 606 return error; 607 608 flush_workqueue(gfs2_delete_workqueue); 609 if (sdp->sd_quotad_process) 610 kthread_stop(sdp->sd_quotad_process); 611 sdp->sd_quotad_process = NULL; 612 if (sdp->sd_logd_process) 613 kthread_stop(sdp->sd_logd_process); 614 sdp->sd_logd_process = NULL; 615 616 gfs2_quota_sync(sdp->sd_vfs, 0); 617 gfs2_statfs_sync(sdp->sd_vfs, 0); 618 619 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN | 620 GFS2_LFC_MAKE_FS_RO); 621 wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0); 622 gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks); 623 624 if (gfs2_holder_initialized(&freeze_gh)) 625 gfs2_glock_dq_uninit(&freeze_gh); 626 627 gfs2_quota_cleanup(sdp); 628 629 return error; 630 } 631 632 /** 633 * gfs2_put_super - Unmount the filesystem 634 * @sb: The VFS superblock 635 * 636 */ 637 638 static void gfs2_put_super(struct super_block *sb) 639 { 640 struct gfs2_sbd *sdp = sb->s_fs_info; 641 int error; 642 struct gfs2_jdesc *jd; 643 644 /* No more recovery requests */ 645 set_bit(SDF_NORECOVERY, &sdp->sd_flags); 646 smp_mb(); 647 648 /* Wait on outstanding recovery */ 649 restart: 650 spin_lock(&sdp->sd_jindex_spin); 651 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 652 if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) 653 continue; 654 spin_unlock(&sdp->sd_jindex_spin); 655 wait_on_bit(&jd->jd_flags, JDF_RECOVERY, 656 TASK_UNINTERRUPTIBLE); 657 goto restart; 658 } 659 spin_unlock(&sdp->sd_jindex_spin); 660 661 if (!sb_rdonly(sb)) { 662 error = gfs2_make_fs_ro(sdp); 663 if (error) 664 gfs2_io_error(sdp); 665 } 666 /* At this point, we're through modifying the disk */ 667 668 /* Release stuff */ 669 670 iput(sdp->sd_jindex); 671 iput(sdp->sd_statfs_inode); 672 iput(sdp->sd_rindex); 673 iput(sdp->sd_quota_inode); 674 675 gfs2_glock_put(sdp->sd_rename_gl); 676 gfs2_glock_put(sdp->sd_freeze_gl); 677 678 if (!sdp->sd_args.ar_spectator) { 679 gfs2_glock_dq_uninit(&sdp->sd_journal_gh); 680 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); 681 gfs2_glock_dq_uninit(&sdp->sd_sc_gh); 682 gfs2_glock_dq_uninit(&sdp->sd_qc_gh); 683 iput(sdp->sd_sc_inode); 684 iput(sdp->sd_qc_inode); 685 } 686 687 gfs2_glock_dq_uninit(&sdp->sd_live_gh); 688 gfs2_clear_rgrpd(sdp); 689 gfs2_jindex_free(sdp); 690 /* Take apart glock structures and buffer lists */ 691 gfs2_gl_hash_clear(sdp); 692 gfs2_delete_debugfs_file(sdp); 693 /* Unmount the locking protocol */ 694 gfs2_lm_unmount(sdp); 695 696 /* At this point, we're through participating in the lockspace */ 697 gfs2_sys_fs_del(sdp); 698 } 699 700 /** 701 * gfs2_sync_fs - sync the filesystem 702 * @sb: the superblock 703 * 704 * Flushes the log to disk. 705 */ 706 707 static int gfs2_sync_fs(struct super_block *sb, int wait) 708 { 709 struct gfs2_sbd *sdp = sb->s_fs_info; 710 711 gfs2_quota_sync(sb, -1); 712 if (wait) 713 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | 714 GFS2_LFC_SYNC_FS); 715 return sdp->sd_log_error; 716 } 717 718 void gfs2_freeze_func(struct work_struct *work) 719 { 720 int error; 721 struct gfs2_holder freeze_gh; 722 struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work); 723 struct super_block *sb = sdp->sd_vfs; 724 725 atomic_inc(&sb->s_active); 726 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, 727 &freeze_gh); 728 if (error) { 729 fs_info(sdp, "GFS2: couldn't get freeze lock : %d\n", error); 730 gfs2_assert_withdraw(sdp, 0); 731 } else { 732 atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); 733 error = thaw_super(sb); 734 if (error) { 735 fs_info(sdp, "GFS2: couldn't thaw filesystem: %d\n", 736 error); 737 gfs2_assert_withdraw(sdp, 0); 738 } 739 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) 740 freeze_gh.gh_flags |= GL_NOCACHE; 741 gfs2_glock_dq_uninit(&freeze_gh); 742 } 743 deactivate_super(sb); 744 clear_bit_unlock(SDF_FS_FROZEN, &sdp->sd_flags); 745 wake_up_bit(&sdp->sd_flags, SDF_FS_FROZEN); 746 return; 747 } 748 749 /** 750 * gfs2_freeze - prevent further writes to the filesystem 751 * @sb: the VFS structure for the filesystem 752 * 753 */ 754 755 static int gfs2_freeze(struct super_block *sb) 756 { 757 struct gfs2_sbd *sdp = sb->s_fs_info; 758 int error = 0; 759 760 mutex_lock(&sdp->sd_freeze_mutex); 761 if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) 762 goto out; 763 764 if (test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) { 765 error = -EINVAL; 766 goto out; 767 } 768 769 for (;;) { 770 error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); 771 if (!error) 772 break; 773 774 if (error == -EBUSY) 775 fs_err(sdp, "waiting for recovery before freeze\n"); 776 else 777 fs_err(sdp, "error freezing FS: %d\n", error); 778 779 fs_err(sdp, "retrying...\n"); 780 msleep(1000); 781 } 782 set_bit(SDF_FS_FROZEN, &sdp->sd_flags); 783 out: 784 mutex_unlock(&sdp->sd_freeze_mutex); 785 return error; 786 } 787 788 /** 789 * gfs2_unfreeze - reallow writes to the filesystem 790 * @sb: the VFS structure for the filesystem 791 * 792 */ 793 794 static int gfs2_unfreeze(struct super_block *sb) 795 { 796 struct gfs2_sbd *sdp = sb->s_fs_info; 797 798 mutex_lock(&sdp->sd_freeze_mutex); 799 if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN || 800 !gfs2_holder_initialized(&sdp->sd_freeze_gh)) { 801 mutex_unlock(&sdp->sd_freeze_mutex); 802 return 0; 803 } 804 805 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 806 mutex_unlock(&sdp->sd_freeze_mutex); 807 return wait_on_bit(&sdp->sd_flags, SDF_FS_FROZEN, TASK_INTERRUPTIBLE); 808 } 809 810 /** 811 * statfs_fill - fill in the sg for a given RG 812 * @rgd: the RG 813 * @sc: the sc structure 814 * 815 * Returns: 0 on success, -ESTALE if the LVB is invalid 816 */ 817 818 static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 819 struct gfs2_statfs_change_host *sc) 820 { 821 gfs2_rgrp_verify(rgd); 822 sc->sc_total += rgd->rd_data; 823 sc->sc_free += rgd->rd_free; 824 sc->sc_dinodes += rgd->rd_dinodes; 825 return 0; 826 } 827 828 /** 829 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 830 * @sdp: the filesystem 831 * @sc: the sc info that will be returned 832 * 833 * Any error (other than a signal) will cause this routine to fall back 834 * to the synchronous version. 835 * 836 * FIXME: This really shouldn't busy wait like this. 837 * 838 * Returns: errno 839 */ 840 841 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 842 { 843 struct gfs2_rgrpd *rgd_next; 844 struct gfs2_holder *gha, *gh; 845 unsigned int slots = 64; 846 unsigned int x; 847 int done; 848 int error = 0, err; 849 850 memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 851 gha = kmalloc_array(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 852 if (!gha) 853 return -ENOMEM; 854 for (x = 0; x < slots; x++) 855 gfs2_holder_mark_uninitialized(gha + x); 856 857 rgd_next = gfs2_rgrpd_get_first(sdp); 858 859 for (;;) { 860 done = 1; 861 862 for (x = 0; x < slots; x++) { 863 gh = gha + x; 864 865 if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) { 866 err = gfs2_glock_wait(gh); 867 if (err) { 868 gfs2_holder_uninit(gh); 869 error = err; 870 } else { 871 if (!error) { 872 struct gfs2_rgrpd *rgd = 873 gfs2_glock2rgrp(gh->gh_gl); 874 875 error = statfs_slow_fill(rgd, sc); 876 } 877 gfs2_glock_dq_uninit(gh); 878 } 879 } 880 881 if (gfs2_holder_initialized(gh)) 882 done = 0; 883 else if (rgd_next && !error) { 884 error = gfs2_glock_nq_init(rgd_next->rd_gl, 885 LM_ST_SHARED, 886 GL_ASYNC, 887 gh); 888 rgd_next = gfs2_rgrpd_get_next(rgd_next); 889 done = 0; 890 } 891 892 if (signal_pending(current)) 893 error = -ERESTARTSYS; 894 } 895 896 if (done) 897 break; 898 899 yield(); 900 } 901 902 kfree(gha); 903 return error; 904 } 905 906 /** 907 * gfs2_statfs_i - Do a statfs 908 * @sdp: the filesystem 909 * @sg: the sg structure 910 * 911 * Returns: errno 912 */ 913 914 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 915 { 916 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 917 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 918 919 spin_lock(&sdp->sd_statfs_spin); 920 921 *sc = *m_sc; 922 sc->sc_total += l_sc->sc_total; 923 sc->sc_free += l_sc->sc_free; 924 sc->sc_dinodes += l_sc->sc_dinodes; 925 926 spin_unlock(&sdp->sd_statfs_spin); 927 928 if (sc->sc_free < 0) 929 sc->sc_free = 0; 930 if (sc->sc_free > sc->sc_total) 931 sc->sc_free = sc->sc_total; 932 if (sc->sc_dinodes < 0) 933 sc->sc_dinodes = 0; 934 935 return 0; 936 } 937 938 /** 939 * gfs2_statfs - Gather and return stats about the filesystem 940 * @sb: The superblock 941 * @statfsbuf: The buffer 942 * 943 * Returns: 0 on success or error code 944 */ 945 946 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 947 { 948 struct super_block *sb = dentry->d_sb; 949 struct gfs2_sbd *sdp = sb->s_fs_info; 950 struct gfs2_statfs_change_host sc; 951 int error; 952 953 error = gfs2_rindex_update(sdp); 954 if (error) 955 return error; 956 957 if (gfs2_tune_get(sdp, gt_statfs_slow)) 958 error = gfs2_statfs_slow(sdp, &sc); 959 else 960 error = gfs2_statfs_i(sdp, &sc); 961 962 if (error) 963 return error; 964 965 buf->f_type = GFS2_MAGIC; 966 buf->f_bsize = sdp->sd_sb.sb_bsize; 967 buf->f_blocks = sc.sc_total; 968 buf->f_bfree = sc.sc_free; 969 buf->f_bavail = sc.sc_free; 970 buf->f_files = sc.sc_dinodes + sc.sc_free; 971 buf->f_ffree = sc.sc_free; 972 buf->f_namelen = GFS2_FNAMESIZE; 973 974 return 0; 975 } 976 977 /** 978 * gfs2_drop_inode - Drop an inode (test for remote unlink) 979 * @inode: The inode to drop 980 * 981 * If we've received a callback on an iopen lock then it's because a 982 * remote node tried to deallocate the inode but failed due to this node 983 * still having the inode open. Here we mark the link count zero 984 * since we know that it must have reached zero if the GLF_DEMOTE flag 985 * is set on the iopen glock. If we didn't do a disk read since the 986 * remote node removed the final link then we might otherwise miss 987 * this event. This check ensures that this node will deallocate the 988 * inode's blocks, or alternatively pass the baton on to another 989 * node for later deallocation. 990 */ 991 992 static int gfs2_drop_inode(struct inode *inode) 993 { 994 struct gfs2_inode *ip = GFS2_I(inode); 995 996 if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) && 997 inode->i_nlink && 998 gfs2_holder_initialized(&ip->i_iopen_gh)) { 999 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1000 if (test_bit(GLF_DEMOTE, &gl->gl_flags)) 1001 clear_nlink(inode); 1002 } 1003 1004 /* 1005 * When under memory pressure when an inode's link count has dropped to 1006 * zero, defer deleting the inode to the delete workqueue. This avoids 1007 * calling into DLM under memory pressure, which can deadlock. 1008 */ 1009 if (!inode->i_nlink && 1010 unlikely(current->flags & PF_MEMALLOC) && 1011 gfs2_holder_initialized(&ip->i_iopen_gh)) { 1012 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1013 1014 gfs2_glock_hold(gl); 1015 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0) 1016 gfs2_glock_queue_put(gl); 1017 return false; 1018 } 1019 1020 return generic_drop_inode(inode); 1021 } 1022 1023 static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 1024 { 1025 do { 1026 if (d1 == d2) 1027 return 1; 1028 d1 = d1->d_parent; 1029 } while (!IS_ROOT(d1)); 1030 return 0; 1031 } 1032 1033 /** 1034 * gfs2_show_options - Show mount options for /proc/mounts 1035 * @s: seq_file structure 1036 * @root: root of this (sub)tree 1037 * 1038 * Returns: 0 on success or error code 1039 */ 1040 1041 static int gfs2_show_options(struct seq_file *s, struct dentry *root) 1042 { 1043 struct gfs2_sbd *sdp = root->d_sb->s_fs_info; 1044 struct gfs2_args *args = &sdp->sd_args; 1045 int val; 1046 1047 if (is_ancestor(root, sdp->sd_master_dir)) 1048 seq_puts(s, ",meta"); 1049 if (args->ar_lockproto[0]) 1050 seq_show_option(s, "lockproto", args->ar_lockproto); 1051 if (args->ar_locktable[0]) 1052 seq_show_option(s, "locktable", args->ar_locktable); 1053 if (args->ar_hostdata[0]) 1054 seq_show_option(s, "hostdata", args->ar_hostdata); 1055 if (args->ar_spectator) 1056 seq_puts(s, ",spectator"); 1057 if (args->ar_localflocks) 1058 seq_puts(s, ",localflocks"); 1059 if (args->ar_debug) 1060 seq_puts(s, ",debug"); 1061 if (args->ar_posix_acl) 1062 seq_puts(s, ",acl"); 1063 if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 1064 char *state; 1065 switch (args->ar_quota) { 1066 case GFS2_QUOTA_OFF: 1067 state = "off"; 1068 break; 1069 case GFS2_QUOTA_ACCOUNT: 1070 state = "account"; 1071 break; 1072 case GFS2_QUOTA_ON: 1073 state = "on"; 1074 break; 1075 default: 1076 state = "unknown"; 1077 break; 1078 } 1079 seq_printf(s, ",quota=%s", state); 1080 } 1081 if (args->ar_suiddir) 1082 seq_puts(s, ",suiddir"); 1083 if (args->ar_data != GFS2_DATA_DEFAULT) { 1084 char *state; 1085 switch (args->ar_data) { 1086 case GFS2_DATA_WRITEBACK: 1087 state = "writeback"; 1088 break; 1089 case GFS2_DATA_ORDERED: 1090 state = "ordered"; 1091 break; 1092 default: 1093 state = "unknown"; 1094 break; 1095 } 1096 seq_printf(s, ",data=%s", state); 1097 } 1098 if (args->ar_discard) 1099 seq_puts(s, ",discard"); 1100 val = sdp->sd_tune.gt_logd_secs; 1101 if (val != 30) 1102 seq_printf(s, ",commit=%d", val); 1103 val = sdp->sd_tune.gt_statfs_quantum; 1104 if (val != 30) 1105 seq_printf(s, ",statfs_quantum=%d", val); 1106 else if (sdp->sd_tune.gt_statfs_slow) 1107 seq_puts(s, ",statfs_quantum=0"); 1108 val = sdp->sd_tune.gt_quota_quantum; 1109 if (val != 60) 1110 seq_printf(s, ",quota_quantum=%d", val); 1111 if (args->ar_statfs_percent) 1112 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); 1113 if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1114 const char *state; 1115 1116 switch (args->ar_errors) { 1117 case GFS2_ERRORS_WITHDRAW: 1118 state = "withdraw"; 1119 break; 1120 case GFS2_ERRORS_PANIC: 1121 state = "panic"; 1122 break; 1123 default: 1124 state = "unknown"; 1125 break; 1126 } 1127 seq_printf(s, ",errors=%s", state); 1128 } 1129 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) 1130 seq_puts(s, ",nobarrier"); 1131 if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) 1132 seq_puts(s, ",demote_interface_used"); 1133 if (args->ar_rgrplvb) 1134 seq_puts(s, ",rgrplvb"); 1135 if (args->ar_loccookie) 1136 seq_puts(s, ",loccookie"); 1137 return 0; 1138 } 1139 1140 static void gfs2_final_release_pages(struct gfs2_inode *ip) 1141 { 1142 struct inode *inode = &ip->i_inode; 1143 struct gfs2_glock *gl = ip->i_gl; 1144 1145 truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0); 1146 truncate_inode_pages(&inode->i_data, 0); 1147 1148 if (atomic_read(&gl->gl_revokes) == 0) { 1149 clear_bit(GLF_LFLUSH, &gl->gl_flags); 1150 clear_bit(GLF_DIRTY, &gl->gl_flags); 1151 } 1152 } 1153 1154 static int gfs2_dinode_dealloc(struct gfs2_inode *ip) 1155 { 1156 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 1157 struct gfs2_rgrpd *rgd; 1158 struct gfs2_holder gh; 1159 int error; 1160 1161 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { 1162 gfs2_consist_inode(ip); 1163 return -EIO; 1164 } 1165 1166 error = gfs2_rindex_update(sdp); 1167 if (error) 1168 return error; 1169 1170 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); 1171 if (error) 1172 return error; 1173 1174 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1175 if (!rgd) { 1176 gfs2_consist_inode(ip); 1177 error = -EIO; 1178 goto out_qs; 1179 } 1180 1181 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); 1182 if (error) 1183 goto out_qs; 1184 1185 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1186 sdp->sd_jdesc->jd_blocks); 1187 if (error) 1188 goto out_rg_gunlock; 1189 1190 gfs2_free_di(rgd, ip); 1191 1192 gfs2_final_release_pages(ip); 1193 1194 gfs2_trans_end(sdp); 1195 1196 out_rg_gunlock: 1197 gfs2_glock_dq_uninit(&gh); 1198 out_qs: 1199 gfs2_quota_unhold(ip); 1200 return error; 1201 } 1202 1203 /** 1204 * gfs2_glock_put_eventually 1205 * @gl: The glock to put 1206 * 1207 * When under memory pressure, trigger a deferred glock put to make sure we 1208 * won't call into DLM and deadlock. Otherwise, put the glock directly. 1209 */ 1210 1211 static void gfs2_glock_put_eventually(struct gfs2_glock *gl) 1212 { 1213 if (current->flags & PF_MEMALLOC) 1214 gfs2_glock_queue_put(gl); 1215 else 1216 gfs2_glock_put(gl); 1217 } 1218 1219 /** 1220 * gfs2_evict_inode - Remove an inode from cache 1221 * @inode: The inode to evict 1222 * 1223 * There are three cases to consider: 1224 * 1. i_nlink == 0, we are final opener (and must deallocate) 1225 * 2. i_nlink == 0, we are not the final opener (and cannot deallocate) 1226 * 3. i_nlink > 0 1227 * 1228 * If the fs is read only, then we have to treat all cases as per #3 1229 * since we are unable to do any deallocation. The inode will be 1230 * deallocated by the next read/write node to attempt an allocation 1231 * in the same resource group 1232 * 1233 * We have to (at the moment) hold the inodes main lock to cover 1234 * the gap between unlocking the shared lock on the iopen lock and 1235 * taking the exclusive lock. I'd rather do a shared -> exclusive 1236 * conversion on the iopen lock, but we can change that later. This 1237 * is safe, just less efficient. 1238 */ 1239 1240 static void gfs2_evict_inode(struct inode *inode) 1241 { 1242 struct super_block *sb = inode->i_sb; 1243 struct gfs2_sbd *sdp = sb->s_fs_info; 1244 struct gfs2_inode *ip = GFS2_I(inode); 1245 struct gfs2_holder gh; 1246 struct address_space *metamapping; 1247 int error; 1248 1249 if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) { 1250 clear_inode(inode); 1251 return; 1252 } 1253 1254 if (inode->i_nlink || sb_rdonly(sb)) 1255 goto out; 1256 1257 if (test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) { 1258 BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl)); 1259 gfs2_holder_mark_uninitialized(&gh); 1260 goto alloc_failed; 1261 } 1262 1263 /* Deletes should never happen under memory pressure anymore. */ 1264 if (WARN_ON_ONCE(current->flags & PF_MEMALLOC)) 1265 goto out; 1266 1267 /* Must not read inode block until block type has been verified */ 1268 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); 1269 if (unlikely(error)) { 1270 glock_clear_object(ip->i_iopen_gh.gh_gl, ip); 1271 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1272 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1273 goto out; 1274 } 1275 1276 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 1277 if (error) 1278 goto out_truncate; 1279 1280 if (test_bit(GIF_INVALID, &ip->i_flags)) { 1281 error = gfs2_inode_refresh(ip); 1282 if (error) 1283 goto out_truncate; 1284 } 1285 1286 /* 1287 * The inode may have been recreated in the meantime. 1288 */ 1289 if (inode->i_nlink) 1290 goto out_truncate; 1291 1292 alloc_failed: 1293 if (gfs2_holder_initialized(&ip->i_iopen_gh) && 1294 test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { 1295 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1296 gfs2_glock_dq_wait(&ip->i_iopen_gh); 1297 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, 1298 &ip->i_iopen_gh); 1299 error = gfs2_glock_nq(&ip->i_iopen_gh); 1300 if (error) 1301 goto out_truncate; 1302 } 1303 1304 if (S_ISDIR(inode->i_mode) && 1305 (ip->i_diskflags & GFS2_DIF_EXHASH)) { 1306 error = gfs2_dir_exhash_dealloc(ip); 1307 if (error) 1308 goto out_unlock; 1309 } 1310 1311 if (ip->i_eattr) { 1312 error = gfs2_ea_dealloc(ip); 1313 if (error) 1314 goto out_unlock; 1315 } 1316 1317 if (!gfs2_is_stuffed(ip)) { 1318 error = gfs2_file_dealloc(ip); 1319 if (error) 1320 goto out_unlock; 1321 } 1322 1323 /* We're about to clear the bitmap for the dinode, but as soon as we 1324 do, gfs2_create_inode can create another inode at the same block 1325 location and try to set gl_object again. We clear gl_object here so 1326 that subsequent inode creates don't see an old gl_object. */ 1327 glock_clear_object(ip->i_gl, ip); 1328 error = gfs2_dinode_dealloc(ip); 1329 goto out_unlock; 1330 1331 out_truncate: 1332 gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL | 1333 GFS2_LFC_EVICT_INODE); 1334 metamapping = gfs2_glock2aspace(ip->i_gl); 1335 if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) { 1336 filemap_fdatawrite(metamapping); 1337 filemap_fdatawait(metamapping); 1338 } 1339 write_inode_now(inode, 1); 1340 gfs2_ail_flush(ip->i_gl, 0); 1341 1342 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 1343 if (error) 1344 goto out_unlock; 1345 /* Needs to be done before glock release & also in a transaction */ 1346 truncate_inode_pages(&inode->i_data, 0); 1347 truncate_inode_pages(metamapping, 0); 1348 gfs2_trans_end(sdp); 1349 1350 out_unlock: 1351 if (gfs2_rs_active(&ip->i_res)) 1352 gfs2_rs_deltree(&ip->i_res); 1353 1354 if (gfs2_holder_initialized(&ip->i_iopen_gh)) { 1355 glock_clear_object(ip->i_iopen_gh.gh_gl, ip); 1356 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { 1357 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1358 gfs2_glock_dq(&ip->i_iopen_gh); 1359 } 1360 gfs2_holder_uninit(&ip->i_iopen_gh); 1361 } 1362 if (gfs2_holder_initialized(&gh)) { 1363 glock_clear_object(ip->i_gl, ip); 1364 gfs2_glock_dq_uninit(&gh); 1365 } 1366 if (error && error != GLR_TRYFAILED && error != -EROFS) 1367 fs_warn(sdp, "gfs2_evict_inode: %d\n", error); 1368 out: 1369 truncate_inode_pages_final(&inode->i_data); 1370 gfs2_rsqa_delete(ip, NULL); 1371 gfs2_ordered_del_inode(ip); 1372 clear_inode(inode); 1373 gfs2_dir_hash_inval(ip); 1374 glock_clear_object(ip->i_gl, ip); 1375 wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE); 1376 gfs2_glock_add_to_lru(ip->i_gl); 1377 gfs2_glock_put_eventually(ip->i_gl); 1378 ip->i_gl = NULL; 1379 if (gfs2_holder_initialized(&ip->i_iopen_gh)) { 1380 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1381 1382 glock_clear_object(gl, ip); 1383 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1384 gfs2_glock_hold(gl); 1385 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1386 gfs2_glock_put_eventually(gl); 1387 } 1388 } 1389 1390 static struct inode *gfs2_alloc_inode(struct super_block *sb) 1391 { 1392 struct gfs2_inode *ip; 1393 1394 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); 1395 if (!ip) 1396 return NULL; 1397 ip->i_flags = 0; 1398 ip->i_gl = NULL; 1399 memset(&ip->i_res, 0, sizeof(ip->i_res)); 1400 RB_CLEAR_NODE(&ip->i_res.rs_node); 1401 ip->i_rahead = 0; 1402 return &ip->i_inode; 1403 } 1404 1405 static void gfs2_free_inode(struct inode *inode) 1406 { 1407 kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode)); 1408 } 1409 1410 const struct super_operations gfs2_super_ops = { 1411 .alloc_inode = gfs2_alloc_inode, 1412 .free_inode = gfs2_free_inode, 1413 .write_inode = gfs2_write_inode, 1414 .dirty_inode = gfs2_dirty_inode, 1415 .evict_inode = gfs2_evict_inode, 1416 .put_super = gfs2_put_super, 1417 .sync_fs = gfs2_sync_fs, 1418 .freeze_super = gfs2_freeze, 1419 .thaw_super = gfs2_unfreeze, 1420 .statfs = gfs2_statfs, 1421 .drop_inode = gfs2_drop_inode, 1422 .show_options = gfs2_show_options, 1423 }; 1424 1425