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 { 404 struct gfs2_inode *ip; 405 struct gfs2_jdesc *jd; 406 struct lfcc *lfcc; 407 LIST_HEAD(list); 408 struct gfs2_log_header_host lh; 409 int error; 410 411 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 412 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); 413 if (!lfcc) { 414 error = -ENOMEM; 415 goto out; 416 } 417 ip = GFS2_I(jd->jd_inode); 418 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); 419 if (error) { 420 kfree(lfcc); 421 goto out; 422 } 423 list_add(&lfcc->list, &list); 424 } 425 426 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE, 427 GL_NOCACHE, &sdp->sd_freeze_gh); 428 if (error) 429 goto out; 430 431 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 432 error = gfs2_jdesc_check(jd); 433 if (error) 434 break; 435 error = gfs2_find_jhead(jd, &lh, false); 436 if (error) 437 break; 438 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 439 error = -EBUSY; 440 break; 441 } 442 } 443 444 if (error) 445 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 446 447 out: 448 while (!list_empty(&list)) { 449 lfcc = list_entry(list.next, struct lfcc, list); 450 list_del(&lfcc->list); 451 gfs2_glock_dq_uninit(&lfcc->gh); 452 kfree(lfcc); 453 } 454 return error; 455 } 456 457 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) 458 { 459 struct gfs2_dinode *str = buf; 460 461 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 462 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); 463 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); 464 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); 465 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); 466 str->di_mode = cpu_to_be32(ip->i_inode.i_mode); 467 str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode)); 468 str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode)); 469 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); 470 str->di_size = cpu_to_be64(i_size_read(&ip->i_inode)); 471 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); 472 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); 473 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); 474 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); 475 476 str->di_goal_meta = cpu_to_be64(ip->i_goal); 477 str->di_goal_data = cpu_to_be64(ip->i_goal); 478 str->di_generation = cpu_to_be64(ip->i_generation); 479 480 str->di_flags = cpu_to_be32(ip->i_diskflags); 481 str->di_height = cpu_to_be16(ip->i_height); 482 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && 483 !(ip->i_diskflags & GFS2_DIF_EXHASH) ? 484 GFS2_FORMAT_DE : 0); 485 str->di_depth = cpu_to_be16(ip->i_depth); 486 str->di_entries = cpu_to_be32(ip->i_entries); 487 488 str->di_eattr = cpu_to_be64(ip->i_eattr); 489 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); 490 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); 491 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); 492 } 493 494 /** 495 * gfs2_write_inode - Make sure the inode is stable on the disk 496 * @inode: The inode 497 * @wbc: The writeback control structure 498 * 499 * Returns: errno 500 */ 501 502 static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) 503 { 504 struct gfs2_inode *ip = GFS2_I(inode); 505 struct gfs2_sbd *sdp = GFS2_SB(inode); 506 struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl); 507 struct backing_dev_info *bdi = inode_to_bdi(metamapping->host); 508 int ret = 0; 509 bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip)); 510 511 if (flush_all) 512 gfs2_log_flush(GFS2_SB(inode), ip->i_gl, 513 GFS2_LOG_HEAD_FLUSH_NORMAL | 514 GFS2_LFC_WRITE_INODE); 515 if (bdi->wb.dirty_exceeded) 516 gfs2_ail1_flush(sdp, wbc); 517 else 518 filemap_fdatawrite(metamapping); 519 if (flush_all) 520 ret = filemap_fdatawait(metamapping); 521 if (ret) 522 mark_inode_dirty_sync(inode); 523 else { 524 spin_lock(&inode->i_lock); 525 if (!(inode->i_flags & I_DIRTY)) 526 gfs2_ordered_del_inode(ip); 527 spin_unlock(&inode->i_lock); 528 } 529 return ret; 530 } 531 532 /** 533 * gfs2_dirty_inode - check for atime updates 534 * @inode: The inode in question 535 * @flags: The type of dirty 536 * 537 * Unfortunately it can be called under any combination of inode 538 * glock and transaction lock, so we have to check carefully. 539 * 540 * At the moment this deals only with atime - it should be possible 541 * to expand that role in future, once a review of the locking has 542 * been carried out. 543 */ 544 545 static void gfs2_dirty_inode(struct inode *inode, int flags) 546 { 547 struct gfs2_inode *ip = GFS2_I(inode); 548 struct gfs2_sbd *sdp = GFS2_SB(inode); 549 struct buffer_head *bh; 550 struct gfs2_holder gh; 551 int need_unlock = 0; 552 int need_endtrans = 0; 553 int ret; 554 555 if (!(flags & I_DIRTY_INODE)) 556 return; 557 if (unlikely(gfs2_withdrawn(sdp))) 558 return; 559 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { 560 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 561 if (ret) { 562 fs_err(sdp, "dirty_inode: glock %d\n", ret); 563 return; 564 } 565 need_unlock = 1; 566 } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) 567 return; 568 569 if (current->journal_info == NULL) { 570 ret = gfs2_trans_begin(sdp, RES_DINODE, 0); 571 if (ret) { 572 fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret); 573 goto out; 574 } 575 need_endtrans = 1; 576 } 577 578 ret = gfs2_meta_inode_buffer(ip, &bh); 579 if (ret == 0) { 580 gfs2_trans_add_meta(ip->i_gl, bh); 581 gfs2_dinode_out(ip, bh->b_data); 582 brelse(bh); 583 } 584 585 if (need_endtrans) 586 gfs2_trans_end(sdp); 587 out: 588 if (need_unlock) 589 gfs2_glock_dq_uninit(&gh); 590 } 591 592 /** 593 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one 594 * @sdp: the filesystem 595 * 596 * Returns: errno 597 */ 598 599 int gfs2_make_fs_ro(struct gfs2_sbd *sdp) 600 { 601 struct gfs2_holder freeze_gh; 602 int error; 603 604 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE, 605 &freeze_gh); 606 if (error && !gfs2_withdrawn(sdp)) 607 return error; 608 609 flush_workqueue(gfs2_delete_workqueue); 610 if (sdp->sd_quotad_process) 611 kthread_stop(sdp->sd_quotad_process); 612 sdp->sd_quotad_process = NULL; 613 if (sdp->sd_logd_process) 614 kthread_stop(sdp->sd_logd_process); 615 sdp->sd_logd_process = NULL; 616 617 gfs2_quota_sync(sdp->sd_vfs, 0); 618 gfs2_statfs_sync(sdp->sd_vfs, 0); 619 620 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN | 621 GFS2_LFC_MAKE_FS_RO); 622 wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0); 623 gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks); 624 625 if (gfs2_holder_initialized(&freeze_gh)) 626 gfs2_glock_dq_uninit(&freeze_gh); 627 628 gfs2_quota_cleanup(sdp); 629 630 return error; 631 } 632 633 /** 634 * gfs2_put_super - Unmount the filesystem 635 * @sb: The VFS superblock 636 * 637 */ 638 639 static void gfs2_put_super(struct super_block *sb) 640 { 641 struct gfs2_sbd *sdp = sb->s_fs_info; 642 int error; 643 struct gfs2_jdesc *jd; 644 645 /* No more recovery requests */ 646 set_bit(SDF_NORECOVERY, &sdp->sd_flags); 647 smp_mb(); 648 649 /* Wait on outstanding recovery */ 650 restart: 651 spin_lock(&sdp->sd_jindex_spin); 652 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 653 if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) 654 continue; 655 spin_unlock(&sdp->sd_jindex_spin); 656 wait_on_bit(&jd->jd_flags, JDF_RECOVERY, 657 TASK_UNINTERRUPTIBLE); 658 goto restart; 659 } 660 spin_unlock(&sdp->sd_jindex_spin); 661 662 if (!sb_rdonly(sb)) { 663 error = gfs2_make_fs_ro(sdp); 664 if (error) 665 gfs2_io_error(sdp); 666 } 667 /* At this point, we're through modifying the disk */ 668 669 /* Release stuff */ 670 671 iput(sdp->sd_jindex); 672 iput(sdp->sd_statfs_inode); 673 iput(sdp->sd_rindex); 674 iput(sdp->sd_quota_inode); 675 676 gfs2_glock_put(sdp->sd_rename_gl); 677 gfs2_glock_put(sdp->sd_freeze_gl); 678 679 if (!sdp->sd_args.ar_spectator) { 680 gfs2_glock_dq_uninit(&sdp->sd_journal_gh); 681 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); 682 gfs2_glock_dq_uninit(&sdp->sd_sc_gh); 683 gfs2_glock_dq_uninit(&sdp->sd_qc_gh); 684 iput(sdp->sd_sc_inode); 685 iput(sdp->sd_qc_inode); 686 } 687 688 gfs2_glock_dq_uninit(&sdp->sd_live_gh); 689 gfs2_clear_rgrpd(sdp); 690 gfs2_jindex_free(sdp); 691 /* Take apart glock structures and buffer lists */ 692 gfs2_gl_hash_clear(sdp); 693 gfs2_delete_debugfs_file(sdp); 694 /* Unmount the locking protocol */ 695 gfs2_lm_unmount(sdp); 696 697 /* At this point, we're through participating in the lockspace */ 698 gfs2_sys_fs_del(sdp); 699 } 700 701 /** 702 * gfs2_sync_fs - sync the filesystem 703 * @sb: the superblock 704 * 705 * Flushes the log to disk. 706 */ 707 708 static int gfs2_sync_fs(struct super_block *sb, int wait) 709 { 710 struct gfs2_sbd *sdp = sb->s_fs_info; 711 712 gfs2_quota_sync(sb, -1); 713 if (wait) 714 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | 715 GFS2_LFC_SYNC_FS); 716 return sdp->sd_log_error; 717 } 718 719 void gfs2_freeze_func(struct work_struct *work) 720 { 721 int error; 722 struct gfs2_holder freeze_gh; 723 struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work); 724 struct super_block *sb = sdp->sd_vfs; 725 726 atomic_inc(&sb->s_active); 727 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, 728 &freeze_gh); 729 if (error) { 730 fs_info(sdp, "GFS2: couldn't get freeze lock : %d\n", error); 731 gfs2_assert_withdraw(sdp, 0); 732 } else { 733 atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); 734 error = thaw_super(sb); 735 if (error) { 736 fs_info(sdp, "GFS2: couldn't thaw filesystem: %d\n", 737 error); 738 gfs2_assert_withdraw(sdp, 0); 739 } 740 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) 741 freeze_gh.gh_flags |= GL_NOCACHE; 742 gfs2_glock_dq_uninit(&freeze_gh); 743 } 744 deactivate_super(sb); 745 clear_bit_unlock(SDF_FS_FROZEN, &sdp->sd_flags); 746 wake_up_bit(&sdp->sd_flags, SDF_FS_FROZEN); 747 return; 748 } 749 750 /** 751 * gfs2_freeze - prevent further writes to the filesystem 752 * @sb: the VFS structure for the filesystem 753 * 754 */ 755 756 static int gfs2_freeze(struct super_block *sb) 757 { 758 struct gfs2_sbd *sdp = sb->s_fs_info; 759 int error = 0; 760 761 mutex_lock(&sdp->sd_freeze_mutex); 762 if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) 763 goto out; 764 765 for (;;) { 766 if (gfs2_withdrawn(sdp)) { 767 error = -EINVAL; 768 goto out; 769 } 770 771 error = gfs2_lock_fs_check_clean(sdp); 772 if (!error) 773 break; 774 775 if (error == -EBUSY) 776 fs_err(sdp, "waiting for recovery before freeze\n"); 777 else if (error == -EIO) { 778 fs_err(sdp, "Fatal IO error: cannot freeze gfs2 due " 779 "to recovery error.\n"); 780 goto out; 781 } else { 782 fs_err(sdp, "error freezing FS: %d\n", error); 783 } 784 fs_err(sdp, "retrying...\n"); 785 msleep(1000); 786 } 787 set_bit(SDF_FS_FROZEN, &sdp->sd_flags); 788 out: 789 mutex_unlock(&sdp->sd_freeze_mutex); 790 return error; 791 } 792 793 /** 794 * gfs2_unfreeze - reallow writes to the filesystem 795 * @sb: the VFS structure for the filesystem 796 * 797 */ 798 799 static int gfs2_unfreeze(struct super_block *sb) 800 { 801 struct gfs2_sbd *sdp = sb->s_fs_info; 802 803 mutex_lock(&sdp->sd_freeze_mutex); 804 if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN || 805 !gfs2_holder_initialized(&sdp->sd_freeze_gh)) { 806 mutex_unlock(&sdp->sd_freeze_mutex); 807 return 0; 808 } 809 810 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 811 mutex_unlock(&sdp->sd_freeze_mutex); 812 return wait_on_bit(&sdp->sd_flags, SDF_FS_FROZEN, TASK_INTERRUPTIBLE); 813 } 814 815 /** 816 * statfs_fill - fill in the sg for a given RG 817 * @rgd: the RG 818 * @sc: the sc structure 819 * 820 * Returns: 0 on success, -ESTALE if the LVB is invalid 821 */ 822 823 static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 824 struct gfs2_statfs_change_host *sc) 825 { 826 gfs2_rgrp_verify(rgd); 827 sc->sc_total += rgd->rd_data; 828 sc->sc_free += rgd->rd_free; 829 sc->sc_dinodes += rgd->rd_dinodes; 830 return 0; 831 } 832 833 /** 834 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 835 * @sdp: the filesystem 836 * @sc: the sc info that will be returned 837 * 838 * Any error (other than a signal) will cause this routine to fall back 839 * to the synchronous version. 840 * 841 * FIXME: This really shouldn't busy wait like this. 842 * 843 * Returns: errno 844 */ 845 846 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 847 { 848 struct gfs2_rgrpd *rgd_next; 849 struct gfs2_holder *gha, *gh; 850 unsigned int slots = 64; 851 unsigned int x; 852 int done; 853 int error = 0, err; 854 855 memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 856 gha = kmalloc_array(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 857 if (!gha) 858 return -ENOMEM; 859 for (x = 0; x < slots; x++) 860 gfs2_holder_mark_uninitialized(gha + x); 861 862 rgd_next = gfs2_rgrpd_get_first(sdp); 863 864 for (;;) { 865 done = 1; 866 867 for (x = 0; x < slots; x++) { 868 gh = gha + x; 869 870 if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) { 871 err = gfs2_glock_wait(gh); 872 if (err) { 873 gfs2_holder_uninit(gh); 874 error = err; 875 } else { 876 if (!error) { 877 struct gfs2_rgrpd *rgd = 878 gfs2_glock2rgrp(gh->gh_gl); 879 880 error = statfs_slow_fill(rgd, sc); 881 } 882 gfs2_glock_dq_uninit(gh); 883 } 884 } 885 886 if (gfs2_holder_initialized(gh)) 887 done = 0; 888 else if (rgd_next && !error) { 889 error = gfs2_glock_nq_init(rgd_next->rd_gl, 890 LM_ST_SHARED, 891 GL_ASYNC, 892 gh); 893 rgd_next = gfs2_rgrpd_get_next(rgd_next); 894 done = 0; 895 } 896 897 if (signal_pending(current)) 898 error = -ERESTARTSYS; 899 } 900 901 if (done) 902 break; 903 904 yield(); 905 } 906 907 kfree(gha); 908 return error; 909 } 910 911 /** 912 * gfs2_statfs_i - Do a statfs 913 * @sdp: the filesystem 914 * @sg: the sg structure 915 * 916 * Returns: errno 917 */ 918 919 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 920 { 921 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 922 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 923 924 spin_lock(&sdp->sd_statfs_spin); 925 926 *sc = *m_sc; 927 sc->sc_total += l_sc->sc_total; 928 sc->sc_free += l_sc->sc_free; 929 sc->sc_dinodes += l_sc->sc_dinodes; 930 931 spin_unlock(&sdp->sd_statfs_spin); 932 933 if (sc->sc_free < 0) 934 sc->sc_free = 0; 935 if (sc->sc_free > sc->sc_total) 936 sc->sc_free = sc->sc_total; 937 if (sc->sc_dinodes < 0) 938 sc->sc_dinodes = 0; 939 940 return 0; 941 } 942 943 /** 944 * gfs2_statfs - Gather and return stats about the filesystem 945 * @sb: The superblock 946 * @statfsbuf: The buffer 947 * 948 * Returns: 0 on success or error code 949 */ 950 951 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 952 { 953 struct super_block *sb = dentry->d_sb; 954 struct gfs2_sbd *sdp = sb->s_fs_info; 955 struct gfs2_statfs_change_host sc; 956 int error; 957 958 error = gfs2_rindex_update(sdp); 959 if (error) 960 return error; 961 962 if (gfs2_tune_get(sdp, gt_statfs_slow)) 963 error = gfs2_statfs_slow(sdp, &sc); 964 else 965 error = gfs2_statfs_i(sdp, &sc); 966 967 if (error) 968 return error; 969 970 buf->f_type = GFS2_MAGIC; 971 buf->f_bsize = sdp->sd_sb.sb_bsize; 972 buf->f_blocks = sc.sc_total; 973 buf->f_bfree = sc.sc_free; 974 buf->f_bavail = sc.sc_free; 975 buf->f_files = sc.sc_dinodes + sc.sc_free; 976 buf->f_ffree = sc.sc_free; 977 buf->f_namelen = GFS2_FNAMESIZE; 978 979 return 0; 980 } 981 982 /** 983 * gfs2_drop_inode - Drop an inode (test for remote unlink) 984 * @inode: The inode to drop 985 * 986 * If we've received a callback on an iopen lock then it's because a 987 * remote node tried to deallocate the inode but failed due to this node 988 * still having the inode open. Here we mark the link count zero 989 * since we know that it must have reached zero if the GLF_DEMOTE flag 990 * is set on the iopen glock. If we didn't do a disk read since the 991 * remote node removed the final link then we might otherwise miss 992 * this event. This check ensures that this node will deallocate the 993 * inode's blocks, or alternatively pass the baton on to another 994 * node for later deallocation. 995 */ 996 997 static int gfs2_drop_inode(struct inode *inode) 998 { 999 struct gfs2_inode *ip = GFS2_I(inode); 1000 1001 if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) && 1002 inode->i_nlink && 1003 gfs2_holder_initialized(&ip->i_iopen_gh)) { 1004 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1005 if (test_bit(GLF_DEMOTE, &gl->gl_flags)) 1006 clear_nlink(inode); 1007 } 1008 1009 /* 1010 * When under memory pressure when an inode's link count has dropped to 1011 * zero, defer deleting the inode to the delete workqueue. This avoids 1012 * calling into DLM under memory pressure, which can deadlock. 1013 */ 1014 if (!inode->i_nlink && 1015 unlikely(current->flags & PF_MEMALLOC) && 1016 gfs2_holder_initialized(&ip->i_iopen_gh)) { 1017 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1018 1019 gfs2_glock_hold(gl); 1020 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0) 1021 gfs2_glock_queue_put(gl); 1022 return false; 1023 } 1024 1025 return generic_drop_inode(inode); 1026 } 1027 1028 static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 1029 { 1030 do { 1031 if (d1 == d2) 1032 return 1; 1033 d1 = d1->d_parent; 1034 } while (!IS_ROOT(d1)); 1035 return 0; 1036 } 1037 1038 /** 1039 * gfs2_show_options - Show mount options for /proc/mounts 1040 * @s: seq_file structure 1041 * @root: root of this (sub)tree 1042 * 1043 * Returns: 0 on success or error code 1044 */ 1045 1046 static int gfs2_show_options(struct seq_file *s, struct dentry *root) 1047 { 1048 struct gfs2_sbd *sdp = root->d_sb->s_fs_info; 1049 struct gfs2_args *args = &sdp->sd_args; 1050 int val; 1051 1052 if (is_ancestor(root, sdp->sd_master_dir)) 1053 seq_puts(s, ",meta"); 1054 if (args->ar_lockproto[0]) 1055 seq_show_option(s, "lockproto", args->ar_lockproto); 1056 if (args->ar_locktable[0]) 1057 seq_show_option(s, "locktable", args->ar_locktable); 1058 if (args->ar_hostdata[0]) 1059 seq_show_option(s, "hostdata", args->ar_hostdata); 1060 if (args->ar_spectator) 1061 seq_puts(s, ",spectator"); 1062 if (args->ar_localflocks) 1063 seq_puts(s, ",localflocks"); 1064 if (args->ar_debug) 1065 seq_puts(s, ",debug"); 1066 if (args->ar_posix_acl) 1067 seq_puts(s, ",acl"); 1068 if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 1069 char *state; 1070 switch (args->ar_quota) { 1071 case GFS2_QUOTA_OFF: 1072 state = "off"; 1073 break; 1074 case GFS2_QUOTA_ACCOUNT: 1075 state = "account"; 1076 break; 1077 case GFS2_QUOTA_ON: 1078 state = "on"; 1079 break; 1080 default: 1081 state = "unknown"; 1082 break; 1083 } 1084 seq_printf(s, ",quota=%s", state); 1085 } 1086 if (args->ar_suiddir) 1087 seq_puts(s, ",suiddir"); 1088 if (args->ar_data != GFS2_DATA_DEFAULT) { 1089 char *state; 1090 switch (args->ar_data) { 1091 case GFS2_DATA_WRITEBACK: 1092 state = "writeback"; 1093 break; 1094 case GFS2_DATA_ORDERED: 1095 state = "ordered"; 1096 break; 1097 default: 1098 state = "unknown"; 1099 break; 1100 } 1101 seq_printf(s, ",data=%s", state); 1102 } 1103 if (args->ar_discard) 1104 seq_puts(s, ",discard"); 1105 val = sdp->sd_tune.gt_logd_secs; 1106 if (val != 30) 1107 seq_printf(s, ",commit=%d", val); 1108 val = sdp->sd_tune.gt_statfs_quantum; 1109 if (val != 30) 1110 seq_printf(s, ",statfs_quantum=%d", val); 1111 else if (sdp->sd_tune.gt_statfs_slow) 1112 seq_puts(s, ",statfs_quantum=0"); 1113 val = sdp->sd_tune.gt_quota_quantum; 1114 if (val != 60) 1115 seq_printf(s, ",quota_quantum=%d", val); 1116 if (args->ar_statfs_percent) 1117 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); 1118 if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1119 const char *state; 1120 1121 switch (args->ar_errors) { 1122 case GFS2_ERRORS_WITHDRAW: 1123 state = "withdraw"; 1124 break; 1125 case GFS2_ERRORS_PANIC: 1126 state = "panic"; 1127 break; 1128 default: 1129 state = "unknown"; 1130 break; 1131 } 1132 seq_printf(s, ",errors=%s", state); 1133 } 1134 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) 1135 seq_puts(s, ",nobarrier"); 1136 if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) 1137 seq_puts(s, ",demote_interface_used"); 1138 if (args->ar_rgrplvb) 1139 seq_puts(s, ",rgrplvb"); 1140 if (args->ar_loccookie) 1141 seq_puts(s, ",loccookie"); 1142 return 0; 1143 } 1144 1145 static void gfs2_final_release_pages(struct gfs2_inode *ip) 1146 { 1147 struct inode *inode = &ip->i_inode; 1148 struct gfs2_glock *gl = ip->i_gl; 1149 1150 truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0); 1151 truncate_inode_pages(&inode->i_data, 0); 1152 1153 if (atomic_read(&gl->gl_revokes) == 0) { 1154 clear_bit(GLF_LFLUSH, &gl->gl_flags); 1155 clear_bit(GLF_DIRTY, &gl->gl_flags); 1156 } 1157 } 1158 1159 static int gfs2_dinode_dealloc(struct gfs2_inode *ip) 1160 { 1161 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 1162 struct gfs2_rgrpd *rgd; 1163 struct gfs2_holder gh; 1164 int error; 1165 1166 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { 1167 gfs2_consist_inode(ip); 1168 return -EIO; 1169 } 1170 1171 error = gfs2_rindex_update(sdp); 1172 if (error) 1173 return error; 1174 1175 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); 1176 if (error) 1177 return error; 1178 1179 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1180 if (!rgd) { 1181 gfs2_consist_inode(ip); 1182 error = -EIO; 1183 goto out_qs; 1184 } 1185 1186 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); 1187 if (error) 1188 goto out_qs; 1189 1190 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1191 sdp->sd_jdesc->jd_blocks); 1192 if (error) 1193 goto out_rg_gunlock; 1194 1195 gfs2_free_di(rgd, ip); 1196 1197 gfs2_final_release_pages(ip); 1198 1199 gfs2_trans_end(sdp); 1200 1201 out_rg_gunlock: 1202 gfs2_glock_dq_uninit(&gh); 1203 out_qs: 1204 gfs2_quota_unhold(ip); 1205 return error; 1206 } 1207 1208 /** 1209 * gfs2_glock_put_eventually 1210 * @gl: The glock to put 1211 * 1212 * When under memory pressure, trigger a deferred glock put to make sure we 1213 * won't call into DLM and deadlock. Otherwise, put the glock directly. 1214 */ 1215 1216 static void gfs2_glock_put_eventually(struct gfs2_glock *gl) 1217 { 1218 if (current->flags & PF_MEMALLOC) 1219 gfs2_glock_queue_put(gl); 1220 else 1221 gfs2_glock_put(gl); 1222 } 1223 1224 /** 1225 * gfs2_evict_inode - Remove an inode from cache 1226 * @inode: The inode to evict 1227 * 1228 * There are three cases to consider: 1229 * 1. i_nlink == 0, we are final opener (and must deallocate) 1230 * 2. i_nlink == 0, we are not the final opener (and cannot deallocate) 1231 * 3. i_nlink > 0 1232 * 1233 * If the fs is read only, then we have to treat all cases as per #3 1234 * since we are unable to do any deallocation. The inode will be 1235 * deallocated by the next read/write node to attempt an allocation 1236 * in the same resource group 1237 * 1238 * We have to (at the moment) hold the inodes main lock to cover 1239 * the gap between unlocking the shared lock on the iopen lock and 1240 * taking the exclusive lock. I'd rather do a shared -> exclusive 1241 * conversion on the iopen lock, but we can change that later. This 1242 * is safe, just less efficient. 1243 */ 1244 1245 static void gfs2_evict_inode(struct inode *inode) 1246 { 1247 struct super_block *sb = inode->i_sb; 1248 struct gfs2_sbd *sdp = sb->s_fs_info; 1249 struct gfs2_inode *ip = GFS2_I(inode); 1250 struct gfs2_holder gh; 1251 struct address_space *metamapping; 1252 int error; 1253 1254 if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) { 1255 clear_inode(inode); 1256 return; 1257 } 1258 1259 if (inode->i_nlink || sb_rdonly(sb)) 1260 goto out; 1261 1262 if (test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) { 1263 BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl)); 1264 gfs2_holder_mark_uninitialized(&gh); 1265 goto alloc_failed; 1266 } 1267 1268 /* Deletes should never happen under memory pressure anymore. */ 1269 if (WARN_ON_ONCE(current->flags & PF_MEMALLOC)) 1270 goto out; 1271 1272 /* Must not read inode block until block type has been verified */ 1273 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); 1274 if (unlikely(error)) { 1275 glock_clear_object(ip->i_iopen_gh.gh_gl, ip); 1276 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1277 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1278 goto out; 1279 } 1280 1281 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 1282 if (error) 1283 goto out_truncate; 1284 1285 if (test_bit(GIF_INVALID, &ip->i_flags)) { 1286 error = gfs2_inode_refresh(ip); 1287 if (error) 1288 goto out_truncate; 1289 } 1290 1291 /* 1292 * The inode may have been recreated in the meantime. 1293 */ 1294 if (inode->i_nlink) 1295 goto out_truncate; 1296 1297 alloc_failed: 1298 if (gfs2_holder_initialized(&ip->i_iopen_gh) && 1299 test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { 1300 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1301 gfs2_glock_dq_wait(&ip->i_iopen_gh); 1302 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, 1303 &ip->i_iopen_gh); 1304 error = gfs2_glock_nq(&ip->i_iopen_gh); 1305 if (error) 1306 goto out_truncate; 1307 } 1308 1309 if (S_ISDIR(inode->i_mode) && 1310 (ip->i_diskflags & GFS2_DIF_EXHASH)) { 1311 error = gfs2_dir_exhash_dealloc(ip); 1312 if (error) 1313 goto out_unlock; 1314 } 1315 1316 if (ip->i_eattr) { 1317 error = gfs2_ea_dealloc(ip); 1318 if (error) 1319 goto out_unlock; 1320 } 1321 1322 if (!gfs2_is_stuffed(ip)) { 1323 error = gfs2_file_dealloc(ip); 1324 if (error) 1325 goto out_unlock; 1326 } 1327 1328 /* We're about to clear the bitmap for the dinode, but as soon as we 1329 do, gfs2_create_inode can create another inode at the same block 1330 location and try to set gl_object again. We clear gl_object here so 1331 that subsequent inode creates don't see an old gl_object. */ 1332 glock_clear_object(ip->i_gl, ip); 1333 error = gfs2_dinode_dealloc(ip); 1334 goto out_unlock; 1335 1336 out_truncate: 1337 gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL | 1338 GFS2_LFC_EVICT_INODE); 1339 metamapping = gfs2_glock2aspace(ip->i_gl); 1340 if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) { 1341 filemap_fdatawrite(metamapping); 1342 filemap_fdatawait(metamapping); 1343 } 1344 write_inode_now(inode, 1); 1345 gfs2_ail_flush(ip->i_gl, 0); 1346 1347 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 1348 if (error) 1349 goto out_unlock; 1350 /* Needs to be done before glock release & also in a transaction */ 1351 truncate_inode_pages(&inode->i_data, 0); 1352 truncate_inode_pages(metamapping, 0); 1353 gfs2_trans_end(sdp); 1354 1355 out_unlock: 1356 if (gfs2_rs_active(&ip->i_res)) 1357 gfs2_rs_deltree(&ip->i_res); 1358 1359 if (gfs2_holder_initialized(&ip->i_iopen_gh)) { 1360 glock_clear_object(ip->i_iopen_gh.gh_gl, ip); 1361 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { 1362 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1363 gfs2_glock_dq(&ip->i_iopen_gh); 1364 } 1365 gfs2_holder_uninit(&ip->i_iopen_gh); 1366 } 1367 if (gfs2_holder_initialized(&gh)) { 1368 glock_clear_object(ip->i_gl, ip); 1369 gfs2_glock_dq_uninit(&gh); 1370 } 1371 if (error && error != GLR_TRYFAILED && error != -EROFS) 1372 fs_warn(sdp, "gfs2_evict_inode: %d\n", error); 1373 out: 1374 truncate_inode_pages_final(&inode->i_data); 1375 gfs2_rsqa_delete(ip, NULL); 1376 gfs2_ordered_del_inode(ip); 1377 clear_inode(inode); 1378 gfs2_dir_hash_inval(ip); 1379 glock_clear_object(ip->i_gl, ip); 1380 wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE); 1381 gfs2_glock_add_to_lru(ip->i_gl); 1382 gfs2_glock_put_eventually(ip->i_gl); 1383 ip->i_gl = NULL; 1384 if (gfs2_holder_initialized(&ip->i_iopen_gh)) { 1385 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 1386 1387 glock_clear_object(gl, ip); 1388 ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 1389 gfs2_glock_hold(gl); 1390 gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1391 gfs2_glock_put_eventually(gl); 1392 } 1393 } 1394 1395 static struct inode *gfs2_alloc_inode(struct super_block *sb) 1396 { 1397 struct gfs2_inode *ip; 1398 1399 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); 1400 if (!ip) 1401 return NULL; 1402 ip->i_flags = 0; 1403 ip->i_gl = NULL; 1404 memset(&ip->i_res, 0, sizeof(ip->i_res)); 1405 RB_CLEAR_NODE(&ip->i_res.rs_node); 1406 ip->i_rahead = 0; 1407 return &ip->i_inode; 1408 } 1409 1410 static void gfs2_free_inode(struct inode *inode) 1411 { 1412 kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode)); 1413 } 1414 1415 const struct super_operations gfs2_super_ops = { 1416 .alloc_inode = gfs2_alloc_inode, 1417 .free_inode = gfs2_free_inode, 1418 .write_inode = gfs2_write_inode, 1419 .dirty_inode = gfs2_dirty_inode, 1420 .evict_inode = gfs2_evict_inode, 1421 .put_super = gfs2_put_super, 1422 .sync_fs = gfs2_sync_fs, 1423 .freeze_super = gfs2_freeze, 1424 .thaw_super = gfs2_unfreeze, 1425 .statfs = gfs2_statfs, 1426 .drop_inode = gfs2_drop_inode, 1427 .show_options = gfs2_show_options, 1428 }; 1429 1430