lustre/llite/llite_capa.c

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