lustre/llite/llite_capa.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_capa.c
  37  *
  38  * Author: Lai Siyao <lsy@clusterfs.com>
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/fs.h>
  44 #include <linux/version.h>
  45 #include <asm/uaccess.h>
  46 #include <linux/file.h>
  47 #include <linux/kmod.h>
  48
  49 #include "llite_internal.h"
  50
  51 /* for obd_capa.c_list, client capa might stay in three places:
  52  * 1. ll_capa_list.
  53  * 2. ll_idle_capas.
  54  * 3. stand alone: just allocated.
  55  */
  56
  57 /* capas for oss writeback and those failed to renew */
  58 static struct list_head ll_idle_capas = LIST_HEAD_INIT(ll_idle_capas);
  59 static struct ptlrpc_thread ll_capa_thread;
  60 static struct list_head *ll_capa_list = &capa_list[CAPA_SITE_CLIENT];
  61
  62 /* llite capa renewal timer */
  63 struct timer_list ll_capa_timer;
  64 /* for debug: indicate whether capa on llite is enabled or not */
  65 static atomic_t ll_capa_debug = ATOMIC_INIT(0);
  66 static unsigned long long ll_capa_renewed = 0;
  67 static unsigned long long ll_capa_renewal_noent = 0;
  68 static unsigned long long ll_capa_renewal_failed = 0;
  69 static unsigned long long ll_capa_renewal_retries = 0;
  70
  71 static int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa);
  72
  73 static inline void update_capa_timer(struct obd_capa *ocapa, cfs_time_t expiry)
  74 {
  75         if (cfs_time_before(expiry, ll_capa_timer.expires) ||
  76             !timer_pending(&ll_capa_timer)) {
  77                 mod_timer(&ll_capa_timer, expiry);
  78                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
  79                            "ll_capa_timer update: %lu/%lu by", expiry, jiffies);
  80         }
  81 }
  82
  83 static inline cfs_time_t capa_renewal_time(struct obd_capa *ocapa)
  84 {
  85         return cfs_time_sub(ocapa->c_expiry,
  86                             cfs_time_seconds(ocapa->c_capa.lc_timeout) / 2);
  87 }
  88
  89 static inline int capa_is_to_expire(struct obd_capa *ocapa)
  90 {
  91         return cfs_time_beforeq(capa_renewal_time(ocapa), cfs_time_current());
  92 }
  93
  94 static inline int have_expired_capa(void)
  95 {
  96         struct obd_capa *ocapa = NULL;
  97         int expired = 0;
  98
  99         /* if ll_capa_list has client capa to expire or ll_idle_capas has
 100          * expired capa, return 1.
 101          */
 102         spin_lock(&capa_lock);
 103         if (!list_empty(ll_capa_list)) {
 104                 ocapa = list_entry(ll_capa_list->next, struct obd_capa,
 105                                        c_list);
 106                 expired = capa_is_to_expire(ocapa);
 107                 if (!expired)
 108                         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 109         } else if (!list_empty(&ll_idle_capas)) {
 110                 ocapa = list_entry(ll_idle_capas.next, struct obd_capa,
 111                                        c_list);
 112                 expired = capa_is_expired(ocapa);
 113                 if (!expired)
 114                         update_capa_timer(ocapa, ocapa->c_expiry);
 115         }
 116         spin_unlock(&capa_lock);
 117
 118         if (expired)
 119                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "expired");
 120         return expired;
 121 }
 122
 123 static void sort_add_capa(struct obd_capa *ocapa, struct list_head *head)
 124 {
 125         struct obd_capa *tmp;
 126         struct list_head *before = NULL;
 127
 128         /* TODO: client capa is sorted by expiry, this could be optimized */
 129         list_for_each_entry_reverse(tmp, head, c_list) {
 130                 if (cfs_time_aftereq(ocapa->c_expiry, tmp->c_expiry)) {
 131                         before = &tmp->c_list;
 132                         break;
 133                 }
 134         }
 135
 136         LASSERT(&ocapa->c_list != before);
 137         list_add(&ocapa->c_list, before ?: head);
 138 }
 139
 140 static inline int obd_capa_open_count(struct obd_capa *oc)
 141 {
 142         struct ll_inode_info *lli = ll_i2info(oc->u.cli.inode);
 143         return atomic_read(&lli->lli_open_count);
 144 }
 145
 146 static void ll_delete_capa(struct obd_capa *ocapa)
 147 {
 148         struct ll_inode_info *lli = ll_i2info(ocapa->u.cli.inode);
 149
 150         if (capa_for_mds(&ocapa->c_capa)) {
 151                 LASSERT(lli->lli_mds_capa == ocapa);
 152                 lli->lli_mds_capa = NULL;
 153         } else if (capa_for_oss(&ocapa->c_capa)) {
 154                 list_del_init(&ocapa->u.cli.lli_list);
 155         }
 156
 157         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free client");
 158         list_del_init(&ocapa->c_list);
 159         capa_count[CAPA_SITE_CLIENT]--;
 160         /* release the ref when alloc */
 161         capa_put(ocapa);
 162 }
 163
 164 /* three places where client capa is deleted:
 165  * 1. capa_thread_main(), main place to delete expired capa.
 166  * 2. ll_clear_inode_capas() in ll_clear_inode().
 167  * 3. ll_truncate_free_capa() delete truncate capa explicitly in ll_setattr_ost().
 168  */
 169 static int capa_thread_main(void *unused)
 170 {
 171         struct obd_capa *ocapa, *tmp, *next;
 172         struct inode *inode = NULL;
 173         struct l_wait_info lwi = { 0 };
 174         int rc;
 175         ENTRY;
 176
 177         thread_set_flags(&ll_capa_thread, SVC_RUNNING);
 178         wake_up(&ll_capa_thread.t_ctl_waitq);
 179
 180         while (1) {
 181                 l_wait_event(ll_capa_thread.t_ctl_waitq,
 182                              !thread_is_running(&ll_capa_thread) ||
 183                              have_expired_capa(),
 184                              &lwi);
 185
 186                 if (!thread_is_running(&ll_capa_thread))
 187                         break;
 188
 189                 next = NULL;
 190
 191                 spin_lock(&capa_lock);
 192                 list_for_each_entry_safe(ocapa, tmp, ll_capa_list, c_list) {
 193                         __u64 ibits;
 194
 195                         LASSERT(ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC);
 196
 197                         if (!capa_is_to_expire(ocapa)) {
 198                                 next = ocapa;
 199                                 break;
 200                         }
 201
 202                         list_del_init(&ocapa->c_list);
 203
 204                         /* for MDS capability, only renew those which belong to
 205                          * dir, or its inode is opened, or client holds LOOKUP
 206                          * lock.
 207                          */
 208                         /* ibits may be changed by ll_have_md_lock() so we have
 209                          * to set it each time */
 210                         ibits = MDS_INODELOCK_LOOKUP;
 211                         if (capa_for_mds(&ocapa->c_capa) &&
 212                             !S_ISDIR(ocapa->u.cli.inode->i_mode) &&
 213                             obd_capa_open_count(ocapa) == 0 &&
 214                             !ll_have_md_lock(ocapa->u.cli.inode,
 215                                              &ibits, LCK_MINMODE)) {
 216                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 217                                            "skip renewal for");
 218                                 sort_add_capa(ocapa, &ll_idle_capas);
 219                                 continue;
 220                         }
 221
 222                         /* for OSS capability, only renew those whose inode is
 223                          * opened.
 224                          */
 225                         if (capa_for_oss(&ocapa->c_capa) &&
 226                             obd_capa_open_count(ocapa) == 0) {
 227                                 /* oss capa with open count == 0 won't renew,
 228                                  * move to idle list */
 229                                 sort_add_capa(ocapa, &ll_idle_capas);
 230                                 continue;
 231                         }
 232
 233                         /* NB iput() is in ll_update_capa() */
 234                         inode = igrab(ocapa->u.cli.inode);
 235                         if (inode == NULL) {
 236                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 237                                            "igrab failed for");
 238                                 continue;
 239                         }
 240
 241                         capa_get(ocapa);
 242                         ll_capa_renewed++;
 243                         spin_unlock(&capa_lock);
 244                         rc = md_renew_capa(ll_i2mdexp(inode), ocapa,
 245                                            ll_update_capa);
 246                         spin_lock(&capa_lock);
 247                         if (rc) {
 248                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 249                                            "renew failed: %d", rc);
 250                                 ll_capa_renewal_failed++;
 251                         }
 252                 }
 253
 254                 if (next)
 255                         update_capa_timer(next, capa_renewal_time(next));
 256
 257                 list_for_each_entry_safe(ocapa, tmp, &ll_idle_capas,
 258                                              c_list) {
 259                         if (!capa_is_expired(ocapa)) {
 260                                 if (!next)
 261                                         update_capa_timer(ocapa,
 262                                                           ocapa->c_expiry);
 263                                 break;
 264                         }
 265
 266                         if (atomic_read(&ocapa->c_refc) > 1) {
 267                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 268                                            "expired(c_refc %d), don't release",
 269                                            atomic_read(&ocapa->c_refc));
 270                                 /* don't try to renew any more */
 271                                 list_del_init(&ocapa->c_list);
 272                                 continue;
 273                         }
 274
 275                         /* expired capa is released. */
 276                         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "release expired");
 277                         ll_delete_capa(ocapa);
 278                 }
 279
 280                 spin_unlock(&capa_lock);
 281         }
 282
 283         thread_set_flags(&ll_capa_thread, SVC_STOPPED);
 284         wake_up(&ll_capa_thread.t_ctl_waitq);
 285         RETURN(0);
 286 }
 287
 288 void ll_capa_timer_callback(unsigned long unused)
 289 {
 290         wake_up(&ll_capa_thread.t_ctl_waitq);
 291 }
 292
 293 int ll_capa_thread_start(void)
 294 {
 295         struct task_struct *task;
 296         ENTRY;
 297
 298         init_waitqueue_head(&ll_capa_thread.t_ctl_waitq);
 299
 300         task = kthread_run(capa_thread_main, NULL, "ll_capa");
 301         if (IS_ERR(task)) {
 302                 CERROR("cannot start expired capa thread: rc %ld\n",
 303                         PTR_ERR(task));
 304                 RETURN(PTR_ERR(task));
 305         }
 306         wait_event(ll_capa_thread.t_ctl_waitq,
 307                        thread_is_running(&ll_capa_thread));
 308
 309         RETURN(0);
 310 }
 311
 312 void ll_capa_thread_stop(void)
 313 {
 314         thread_set_flags(&ll_capa_thread, SVC_STOPPING);
 315         wake_up(&ll_capa_thread.t_ctl_waitq);
 316         wait_event(ll_capa_thread.t_ctl_waitq,
 317                        thread_is_stopped(&ll_capa_thread));
 318 }
 319
 320 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc)
 321 {
 322         struct ll_inode_info *lli = ll_i2info(inode);
 323         struct obd_capa *ocapa;
 324         int found = 0;
 325
 326         ENTRY;
 327
 328         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_OSS_CAPA) == 0)
 329                 RETURN(NULL);
 330
 331         LASSERT(opc == CAPA_OPC_OSS_WRITE || opc == CAPA_OPC_OSS_RW ||
 332                 opc == CAPA_OPC_OSS_TRUNC);
 333
 334         spin_lock(&capa_lock);
 335         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 336                 if (capa_is_expired(ocapa))
 337                         continue;
 338                 if ((opc & CAPA_OPC_OSS_WRITE) &&
 339                     capa_opc_supported(&ocapa->c_capa, CAPA_OPC_OSS_WRITE)) {
 340                         found = 1;
 341                         break;
 342                 } else if ((opc & CAPA_OPC_OSS_READ) &&
 343                            capa_opc_supported(&ocapa->c_capa,
 344                                               CAPA_OPC_OSS_READ)) {
 345                         found = 1;
 346                         break;
 347                 } else if ((opc & CAPA_OPC_OSS_TRUNC) &&
 348                            capa_opc_supported(&ocapa->c_capa, opc)) {
 349                         found = 1;
 350                         break;
 351                 }
 352         }
 353
 354         if (found) {
 355                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 356                                   ll_inode2fid(inode)));
 357                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 358
 359                 capa_get(ocapa);
 360
 361                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 362         } else {
 363                 ocapa = NULL;
 364
 365                 if (atomic_read(&ll_capa_debug)) {
 366                         CERROR("no capability for "DFID" opc "LPX64"\n",
 367                                PFID(&lli->lli_fid), opc);
 368                         atomic_set(&ll_capa_debug, 0);
 369                 }
 370         }
 371         spin_unlock(&capa_lock);
 372
 373         RETURN(ocapa);
 374 }
 375 EXPORT_SYMBOL(ll_osscapa_get);
 376
 377 struct obd_capa *ll_mdscapa_get(struct inode *inode)
 378 {
 379         struct ll_inode_info *lli = ll_i2info(inode);
 380         struct obd_capa *ocapa;
 381         ENTRY;
 382
 383         LASSERT(inode != NULL);
 384
 385         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_MDS_CAPA) == 0)
 386                 RETURN(NULL);
 387
 388         spin_lock(&capa_lock);
 389         ocapa = capa_get(lli->lli_mds_capa);
 390         spin_unlock(&capa_lock);
 391         if (!ocapa && atomic_read(&ll_capa_debug)) {
 392                 CERROR("no mds capability for "DFID"\n", PFID(&lli->lli_fid));
 393                 atomic_set(&ll_capa_debug, 0);
 394         }
 395
 396         RETURN(ocapa);
 397 }
 398
 399 static struct obd_capa *do_add_mds_capa(struct inode *inode,
 400                                         struct obd_capa *ocapa)
 401 {
 402         struct ll_inode_info *lli = ll_i2info(inode);
 403         struct obd_capa *old = lli->lli_mds_capa;
 404         struct lustre_capa *capa = &ocapa->c_capa;
 405
 406         if (!old) {
 407                 ocapa->u.cli.inode = inode;
 408                 lli->lli_mds_capa = ocapa;
 409                 capa_count[CAPA_SITE_CLIENT]++;
 410
 411                 DEBUG_CAPA(D_SEC, capa, "add MDS");
 412         } else {
 413                 spin_lock(&old->c_lock);
 414                 old->c_capa = *capa;
 415                 spin_unlock(&old->c_lock);
 416
 417                 DEBUG_CAPA(D_SEC, capa, "update MDS");
 418
 419                 capa_put(ocapa);
 420                 ocapa = old;
 421         }
 422         return ocapa;
 423 }
 424
 425 static struct obd_capa *do_lookup_oss_capa(struct inode *inode, int opc)
 426 {
 427         struct ll_inode_info *lli = ll_i2info(inode);
 428         struct obd_capa *ocapa;
 429
 430         /* inside capa_lock */
 431         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 432                 if ((capa_opc(&ocapa->c_capa) & opc) != opc)
 433                         continue;
 434
 435                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 436                                   ll_inode2fid(inode)));
 437                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 438
 439                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 440                 return ocapa;
 441         }
 442
 443         return NULL;
 444 }
 445
 446 static inline void inode_add_oss_capa(struct inode *inode,
 447                                       struct obd_capa *ocapa)
 448 {
 449         struct ll_inode_info *lli = ll_i2info(inode);
 450         struct obd_capa *tmp;
 451         struct list_head *next = NULL;
 452
 453         /* capa is sorted in lli_oss_capas so lookup can always find the
 454          * latest one */
 455         list_for_each_entry(tmp, &lli->lli_oss_capas, u.cli.lli_list) {
 456                 if (cfs_time_after(ocapa->c_expiry, tmp->c_expiry)) {
 457                         next = &tmp->u.cli.lli_list;
 458                         break;
 459                 }
 460         }
 461         LASSERT(&ocapa->u.cli.lli_list != next);
 462         list_move_tail(&ocapa->u.cli.lli_list, next ?: &lli->lli_oss_capas);
 463 }
 464
 465 static struct obd_capa *do_add_oss_capa(struct inode *inode,
 466                                         struct obd_capa *ocapa)
 467 {
 468         struct obd_capa *old;
 469         struct lustre_capa *capa = &ocapa->c_capa;
 470
 471         LASSERTF(S_ISREG(inode->i_mode),
 472                  "inode has oss capa, but not regular file, mode: %d\n",
 473                  inode->i_mode);
 474
 475         /* FIXME: can't replace it so easily with fine-grained opc */
 476         old = do_lookup_oss_capa(inode, capa_opc(capa) & CAPA_OPC_OSS_ONLY);
 477         if (!old) {
 478                 ocapa->u.cli.inode = inode;
 479                 INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
 480                 capa_count[CAPA_SITE_CLIENT]++;
 481
 482                 DEBUG_CAPA(D_SEC, capa, "add OSS");
 483         } else {
 484                 spin_lock(&old->c_lock);
 485                 old->c_capa = *capa;
 486                 spin_unlock(&old->c_lock);
 487
 488                 DEBUG_CAPA(D_SEC, capa, "update OSS");
 489
 490                 capa_put(ocapa);
 491                 ocapa = old;
 492         }
 493
 494         inode_add_oss_capa(inode, ocapa);
 495         return ocapa;
 496 }
 497
 498 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa)
 499 {
 500         spin_lock(&capa_lock);
 501         ocapa = capa_for_mds(&ocapa->c_capa) ? do_add_mds_capa(inode, ocapa) :
 502                                                do_add_oss_capa(inode, ocapa);
 503
 504         /* truncate capa won't renew */
 505         if (ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC) {
 506                 set_capa_expiry(ocapa);
 507                 list_del_init(&ocapa->c_list);
 508                 sort_add_capa(ocapa, ll_capa_list);
 509
 510                 update_capa_timer(ocapa, capa_renewal_time(ocapa));
 511         }
 512
 513         spin_unlock(&capa_lock);
 514
 515         atomic_set(&ll_capa_debug, 1);
 516         return ocapa;
 517 }
 518
 519 static inline void delay_capa_renew(struct obd_capa *oc, cfs_time_t delay)
 520 {
 521         /* NB: set a fake expiry for this capa to prevent it renew too soon */
 522         oc->c_expiry = cfs_time_add(oc->c_expiry, cfs_time_seconds(delay));
 523 }
 524
 525 static int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa)
 526 {
 527         struct inode *inode = ocapa->u.cli.inode;
 528         int rc = 0;
 529         ENTRY;
 530
 531         LASSERT(ocapa);
 532
 533         if (IS_ERR(capa)) {
 534                 /* set error code */
 535                 rc = PTR_ERR(capa);
 536                 spin_lock(&capa_lock);
 537                 if (rc == -ENOENT) {
 538                         DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 539                                    "renewal canceled because object removed");
 540                         ll_capa_renewal_noent++;
 541                 } else {
 542                         ll_capa_renewal_failed++;
 543
 544                         /* failed capa won't be renewed any longer, but if -EIO,
 545                          * client might be doing recovery, retry in 2 min. */
 546                         if (rc == -EIO && !capa_is_expired(ocapa)) {
 547                                 delay_capa_renew(ocapa, 120);
 548                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 549                                            "renewal failed: -EIO, "
 550                                            "retry in 2 mins");
 551                                 ll_capa_renewal_retries++;
 552                                 GOTO(retry, rc);
 553                         } else {
 554                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 555                                            "renewal failed(rc: %d) for", rc);
 556                         }
 557                 }
 558
 559                 list_del_init(&ocapa->c_list);
 560                 sort_add_capa(ocapa, &ll_idle_capas);
 561                 spin_unlock(&capa_lock);
 562
 563                 capa_put(ocapa);
 564                 iput(inode);
 565                 RETURN(rc);
 566         }
 567
 568         spin_lock(&ocapa->c_lock);
 569         LASSERT(!memcmp(&ocapa->c_capa, capa,
 570                         offsetof(struct lustre_capa, lc_opc)));
 571         ocapa->c_capa = *capa;
 572         set_capa_expiry(ocapa);
 573         spin_unlock(&ocapa->c_lock);
 574
 575         spin_lock(&capa_lock);
 576         if (capa_for_oss(capa))
 577                 inode_add_oss_capa(inode, ocapa);
 578         DEBUG_CAPA(D_SEC, capa, "renew");
 579         EXIT;
 580 retry:
 581         list_del_init(&ocapa->c_list);
 582         sort_add_capa(ocapa, ll_capa_list);
 583         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 584         spin_unlock(&capa_lock);
 585
 586         capa_put(ocapa);
 587         iput(inode);
 588         return rc;
 589 }
 590
 591 void ll_capa_open(struct inode *inode)
 592 {
 593         struct ll_inode_info *lli = ll_i2info(inode);
 594
 595         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 596             == 0)
 597                 return;
 598
 599         if (!S_ISREG(inode->i_mode))
 600                 return;
 601
 602         atomic_inc(&lli->lli_open_count);
 603 }
 604
 605 void ll_capa_close(struct inode *inode)
 606 {
 607         struct ll_inode_info *lli = ll_i2info(inode);
 608
 609         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 610             == 0)
 611                 return;
 612
 613         if (!S_ISREG(inode->i_mode))
 614                 return;
 615
 616         atomic_dec(&lli->lli_open_count);
 617 }
 618
 619 /* delete CAPA_OPC_OSS_TRUNC only */
 620 void ll_truncate_free_capa(struct obd_capa *ocapa)
 621 {
 622         if (!ocapa)
 623                 return;
 624
 625         LASSERT(ocapa->c_capa.lc_opc & CAPA_OPC_OSS_TRUNC);
 626         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free truncate");
 627
 628         /* release ref when find */
 629         capa_put(ocapa);
 630         if (likely(ocapa->c_capa.lc_opc == CAPA_OPC_OSS_TRUNC)) {
 631                 spin_lock(&capa_lock);
 632                 ll_delete_capa(ocapa);
 633                 spin_unlock(&capa_lock);
 634         }
 635 }
 636
 637 void ll_clear_inode_capas(struct inode *inode)
 638 {
 639         struct ll_inode_info *lli = ll_i2info(inode);
 640         struct obd_capa *ocapa, *tmp;
 641
 642         spin_lock(&capa_lock);
 643         ocapa = lli->lli_mds_capa;
 644         if (ocapa)
 645                 ll_delete_capa(ocapa);
 646
 647         list_for_each_entry_safe(ocapa, tmp, &lli->lli_oss_capas,
 648                                      u.cli.lli_list)
 649                 ll_delete_capa(ocapa);
 650         spin_unlock(&capa_lock);
 651 }
 652
 653 void ll_print_capa_stat(struct ll_sb_info *sbi)
 654 {
 655         if (sbi->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 656                 LCONSOLE_INFO("Fid capabilities renewed: %llu\n"
 657                               "Fid capabilities renewal ENOENT: %llu\n"
 658                               "Fid capabilities failed to renew: %llu\n"
 659                               "Fid capabilities renewal retries: %llu\n",
 660                               ll_capa_renewed, ll_capa_renewal_noent,
 661                               ll_capa_renewal_failed, ll_capa_renewal_retries);
 662 }