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                                              LCK_MINMODE)) {
 217                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 218                                            "skip renewal for");
 219                                 sort_add_capa(ocapa, &ll_idle_capas);
 220                                 continue;
 221                         }
 222
 223                         /* for OSS capability, only renew those whose inode is
 224                          * opened.
 225                          */
 226                         if (capa_for_oss(&ocapa->c_capa) &&
 227                             obd_capa_open_count(ocapa) == 0) {
 228                                 /* oss capa with open count == 0 won't renew,
 229                                  * move to idle list */
 230                                 sort_add_capa(ocapa, &ll_idle_capas);
 231                                 continue;
 232                         }
 233
 234                         /* NB iput() is in ll_update_capa() */
 235                         inode = igrab(ocapa->u.cli.inode);
 236                         if (inode == NULL) {
 237                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 238                                            "igrab failed for");
 239                                 continue;
 240                         }
 241
 242                         capa_get(ocapa);
 243                         ll_capa_renewed++;
 244                         cfs_spin_unlock(&capa_lock);
 245                         rc = md_renew_capa(ll_i2mdexp(inode), ocapa,
 246                                            ll_update_capa);
 247                         cfs_spin_lock(&capa_lock);
 248                         if (rc) {
 249                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 250                                            "renew failed: %d", rc);
 251                                 ll_capa_renewal_failed++;
 252                         }
 253                 }
 254
 255                 if (next)
 256                         update_capa_timer(next, capa_renewal_time(next));
 257
 258                 cfs_list_for_each_entry_safe(ocapa, tmp, &ll_idle_capas,
 259                                              c_list) {
 260                         if (!capa_is_expired(ocapa)) {
 261                                 if (!next)
 262                                         update_capa_timer(ocapa, ocapa->c_expiry);
 263                                 break;
 264                         }
 265
 266                         if (cfs_atomic_read(&ocapa->c_refc) > 1) {
 267                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 268                                            "expired(c_refc %d), don't release",
 269                                            cfs_atomic_read(&ocapa->c_refc));
 270                                 /* don't try to renew any more */
 271                                 cfs_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                 cfs_spin_unlock(&capa_lock);
 281         }
 282
 283         ll_capa_thread.t_flags = SVC_STOPPED;
 284         cfs_waitq_signal(&ll_capa_thread.t_ctl_waitq);
 285         RETURN(0);
 286 }
 287
 288 void ll_capa_timer_callback(unsigned long unused)
 289 {
 290         cfs_waitq_signal(&ll_capa_thread.t_ctl_waitq);
 291 }
 292
 293 int ll_capa_thread_start(void)
 294 {
 295         int rc;
 296         ENTRY;
 297
 298         cfs_waitq_init(&ll_capa_thread.t_ctl_waitq);
 299
 300         rc = cfs_kernel_thread(capa_thread_main, NULL, 0);
 301         if (rc < 0) {
 302                 CERROR("cannot start expired capa thread: rc %d\n", rc);
 303                 RETURN(rc);
 304         }
 305         cfs_wait_event(ll_capa_thread.t_ctl_waitq,
 306                        ll_capa_thread.t_flags & SVC_RUNNING);
 307
 308         RETURN(0);
 309 }
 310
 311 void ll_capa_thread_stop(void)
 312 {
 313         ll_capa_thread.t_flags = SVC_STOPPING;
 314         cfs_waitq_signal(&ll_capa_thread.t_ctl_waitq);
 315         cfs_wait_event(ll_capa_thread.t_ctl_waitq,
 316                        ll_capa_thread.t_flags & SVC_STOPPED);
 317 }
 318
 319 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc)
 320 {
 321         struct ll_inode_info *lli = ll_i2info(inode);
 322         struct obd_capa *ocapa;
 323         int found = 0;
 324
 325         ENTRY;
 326
 327         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_OSS_CAPA) == 0)
 328                 RETURN(NULL);
 329
 330         LASSERT(opc == CAPA_OPC_OSS_WRITE || opc == CAPA_OPC_OSS_RW ||
 331                 opc == CAPA_OPC_OSS_TRUNC);
 332
 333         cfs_spin_lock(&capa_lock);
 334         cfs_list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 335                 if (capa_is_expired(ocapa))
 336                         continue;
 337                 if ((opc & CAPA_OPC_OSS_WRITE) &&
 338                     capa_opc_supported(&ocapa->c_capa, CAPA_OPC_OSS_WRITE)) {
 339                         found = 1;
 340                         break;
 341                 } else if ((opc & CAPA_OPC_OSS_READ) &&
 342                            capa_opc_supported(&ocapa->c_capa,
 343                                               CAPA_OPC_OSS_READ)) {
 344                         found = 1;
 345                         break;
 346                 } else if ((opc & CAPA_OPC_OSS_TRUNC) &&
 347                            capa_opc_supported(&ocapa->c_capa, opc)) {
 348                         found = 1;
 349                         break;
 350                 }
 351         }
 352
 353         if (found) {
 354                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 355                                   ll_inode2fid(inode)));
 356                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 357
 358                 capa_get(ocapa);
 359
 360                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 361         } else {
 362                 ocapa = NULL;
 363
 364                 if (cfs_atomic_read(&ll_capa_debug)) {
 365                         CERROR("no capability for "DFID" opc "LPX64"\n",
 366                                PFID(&lli->lli_fid), opc);
 367                         cfs_atomic_set(&ll_capa_debug, 0);
 368                 }
 369         }
 370         cfs_spin_unlock(&capa_lock);
 371
 372         RETURN(ocapa);
 373 }
 374 EXPORT_SYMBOL(ll_osscapa_get);
 375
 376 struct obd_capa *ll_mdscapa_get(struct inode *inode)
 377 {
 378         struct ll_inode_info *lli = ll_i2info(inode);
 379         struct obd_capa *ocapa;
 380         ENTRY;
 381
 382         LASSERT(inode != NULL);
 383
 384         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_MDS_CAPA) == 0)
 385                 RETURN(NULL);
 386
 387         cfs_spin_lock(&capa_lock);
 388         ocapa = capa_get(lli->lli_mds_capa);
 389         cfs_spin_unlock(&capa_lock);
 390         if (!ocapa && cfs_atomic_read(&ll_capa_debug)) {
 391                 CERROR("no mds capability for "DFID"\n", PFID(&lli->lli_fid));
 392                 cfs_atomic_set(&ll_capa_debug, 0);
 393         }
 394
 395         RETURN(ocapa);
 396 }
 397
 398 static struct obd_capa *do_add_mds_capa(struct inode *inode,
 399                                         struct obd_capa *ocapa)
 400 {
 401         struct ll_inode_info *lli = ll_i2info(inode);
 402         struct obd_capa *old = lli->lli_mds_capa;
 403         struct lustre_capa *capa = &ocapa->c_capa;
 404
 405         if (!old) {
 406                 ocapa->u.cli.inode = inode;
 407                 lli->lli_mds_capa = ocapa;
 408                 capa_count[CAPA_SITE_CLIENT]++;
 409
 410                 DEBUG_CAPA(D_SEC, capa, "add MDS");
 411         } else {
 412                 cfs_spin_lock(&old->c_lock);
 413                 old->c_capa = *capa;
 414                 cfs_spin_unlock(&old->c_lock);
 415
 416                 DEBUG_CAPA(D_SEC, capa, "update MDS");
 417
 418                 capa_put(ocapa);
 419                 ocapa = old;
 420         }
 421         return ocapa;
 422 }
 423
 424 static struct obd_capa *do_lookup_oss_capa(struct inode *inode, int opc)
 425 {
 426         struct ll_inode_info *lli = ll_i2info(inode);
 427         struct obd_capa *ocapa;
 428
 429         /* inside capa_lock */
 430         cfs_list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 431                 if ((capa_opc(&ocapa->c_capa) & opc) != opc)
 432                         continue;
 433
 434                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 435                                   ll_inode2fid(inode)));
 436                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 437
 438                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 439                 return ocapa;
 440         }
 441
 442         return NULL;
 443 }
 444
 445 static inline void inode_add_oss_capa(struct inode *inode,
 446                                       struct obd_capa *ocapa)
 447 {
 448         struct ll_inode_info *lli = ll_i2info(inode);
 449         struct obd_capa *tmp;
 450         cfs_list_t *next = NULL;
 451
 452         /* capa is sorted in lli_oss_capas so lookup can always find the
 453          * latest one */
 454         cfs_list_for_each_entry(tmp, &lli->lli_oss_capas, u.cli.lli_list) {
 455                 if (cfs_time_after(ocapa->c_expiry, tmp->c_expiry)) {
 456                         next = &tmp->u.cli.lli_list;
 457                         break;
 458                 }
 459         }
 460         LASSERT(&ocapa->u.cli.lli_list != next);
 461         cfs_list_move_tail(&ocapa->u.cli.lli_list, next ?: &lli->lli_oss_capas);
 462 }
 463
 464 static struct obd_capa *do_add_oss_capa(struct inode *inode,
 465                                         struct obd_capa *ocapa)
 466 {
 467         struct obd_capa *old;
 468         struct lustre_capa *capa = &ocapa->c_capa;
 469
 470         LASSERTF(S_ISREG(inode->i_mode),
 471                  "inode has oss capa, but not regular file, mode: %d\n",
 472                  inode->i_mode);
 473
 474         /* FIXME: can't replace it so easily with fine-grained opc */
 475         old = do_lookup_oss_capa(inode, capa_opc(capa) & CAPA_OPC_OSS_ONLY);
 476         if (!old) {
 477                 ocapa->u.cli.inode = inode;
 478                 CFS_INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
 479                 capa_count[CAPA_SITE_CLIENT]++;
 480
 481                 DEBUG_CAPA(D_SEC, capa, "add OSS");
 482         } else {
 483                 cfs_spin_lock(&old->c_lock);
 484                 old->c_capa = *capa;
 485                 cfs_spin_unlock(&old->c_lock);
 486
 487                 DEBUG_CAPA(D_SEC, capa, "update OSS");
 488
 489                 capa_put(ocapa);
 490                 ocapa = old;
 491         }
 492
 493         inode_add_oss_capa(inode, ocapa);
 494         return ocapa;
 495 }
 496
 497 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa)
 498 {
 499         cfs_spin_lock(&capa_lock);
 500         ocapa = capa_for_mds(&ocapa->c_capa) ? do_add_mds_capa(inode, ocapa) :
 501                                                do_add_oss_capa(inode, ocapa);
 502
 503         /* truncate capa won't renew */
 504         if (ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC) {
 505                 set_capa_expiry(ocapa);
 506                 cfs_list_del_init(&ocapa->c_list);
 507                 sort_add_capa(ocapa, ll_capa_list);
 508
 509                 update_capa_timer(ocapa, capa_renewal_time(ocapa));
 510         }
 511
 512         cfs_spin_unlock(&capa_lock);
 513
 514         cfs_atomic_set(&ll_capa_debug, 1);
 515         return ocapa;
 516 }
 517
 518 static inline void delay_capa_renew(struct obd_capa *oc, cfs_time_t delay)
 519 {
 520         /* NB: set a fake expiry for this capa to prevent it renew too soon */
 521         oc->c_expiry = cfs_time_add(oc->c_expiry, cfs_time_seconds(delay));
 522 }
 523
 524 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa)
 525 {
 526         struct inode *inode = ocapa->u.cli.inode;
 527         int rc = 0;
 528         ENTRY;
 529
 530         LASSERT(ocapa);
 531
 532         if (IS_ERR(capa)) {
 533                 /* set error code */
 534                 rc = PTR_ERR(capa);
 535                 cfs_spin_lock(&capa_lock);
 536                 if (rc == -ENOENT) {
 537                         DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 538                                    "renewal canceled because object removed");
 539                         ll_capa_renewal_noent++;
 540                 } else {
 541                         ll_capa_renewal_failed++;
 542
 543                         /* failed capa won't be renewed any longer, but if -EIO,
 544                          * client might be doing recovery, retry in 2 min. */
 545                         if (rc == -EIO && !capa_is_expired(ocapa)) {
 546                                 delay_capa_renew(ocapa, 120);
 547                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 548                                            "renewal failed: -EIO, retry in 2 mins");
 549                                 ll_capa_renewal_retries++;
 550                                 GOTO(retry, rc);
 551                         } else {
 552                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 553                                            "renewal failed(rc: %d) for", rc);
 554                         }
 555                 }
 556
 557                 cfs_list_del_init(&ocapa->c_list);
 558                 sort_add_capa(ocapa, &ll_idle_capas);
 559                 cfs_spin_unlock(&capa_lock);
 560
 561                 capa_put(ocapa);
 562                 iput(inode);
 563                 RETURN(rc);
 564         }
 565
 566         cfs_spin_lock(&ocapa->c_lock);
 567         LASSERT(!memcmp(&ocapa->c_capa, capa,
 568                         offsetof(struct lustre_capa, lc_opc)));
 569         ocapa->c_capa = *capa;
 570         set_capa_expiry(ocapa);
 571         cfs_spin_unlock(&ocapa->c_lock);
 572
 573         cfs_spin_lock(&capa_lock);
 574         if (capa_for_oss(capa))
 575                 inode_add_oss_capa(inode, ocapa);
 576         DEBUG_CAPA(D_SEC, capa, "renew");
 577         EXIT;
 578 retry:
 579         cfs_list_del_init(&ocapa->c_list);
 580         sort_add_capa(ocapa, ll_capa_list);
 581         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 582         cfs_spin_unlock(&capa_lock);
 583
 584         capa_put(ocapa);
 585         iput(inode);
 586         return rc;
 587 }
 588
 589 void ll_capa_open(struct inode *inode)
 590 {
 591         struct ll_inode_info *lli = ll_i2info(inode);
 592
 593         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 594             == 0)
 595                 return;
 596
 597         if (!S_ISREG(inode->i_mode))
 598                 return;
 599
 600         cfs_atomic_inc(&lli->lli_open_count);
 601 }
 602
 603 void ll_capa_close(struct inode *inode)
 604 {
 605         struct ll_inode_info *lli = ll_i2info(inode);
 606
 607         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 608             == 0)
 609                 return;
 610
 611         if (!S_ISREG(inode->i_mode))
 612                 return;
 613
 614         cfs_atomic_dec(&lli->lli_open_count);
 615 }
 616
 617 /* delete CAPA_OPC_OSS_TRUNC only */
 618 void ll_truncate_free_capa(struct obd_capa *ocapa)
 619 {
 620         if (!ocapa)
 621                 return;
 622
 623         LASSERT(ocapa->c_capa.lc_opc & CAPA_OPC_OSS_TRUNC);
 624         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free truncate");
 625
 626         /* release ref when find */
 627         capa_put(ocapa);
 628         if (likely(ocapa->c_capa.lc_opc == CAPA_OPC_OSS_TRUNC)) {
 629                 cfs_spin_lock(&capa_lock);
 630                 ll_delete_capa(ocapa);
 631                 cfs_spin_unlock(&capa_lock);
 632         }
 633 }
 634
 635 void ll_clear_inode_capas(struct inode *inode)
 636 {
 637         struct ll_inode_info *lli = ll_i2info(inode);
 638         struct obd_capa *ocapa, *tmp;
 639
 640         cfs_spin_lock(&capa_lock);
 641         ocapa = lli->lli_mds_capa;
 642         if (ocapa)
 643                 ll_delete_capa(ocapa);
 644
 645         cfs_list_for_each_entry_safe(ocapa, tmp, &lli->lli_oss_capas,
 646                                      u.cli.lli_list)
 647                 ll_delete_capa(ocapa);
 648         cfs_spin_unlock(&capa_lock);
 649 }
 650
 651 void ll_print_capa_stat(struct ll_sb_info *sbi)
 652 {
 653         if (sbi->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 654                 LCONSOLE_INFO("Fid capabilities renewed: %llu\n"
 655                               "Fid capabilities renewal ENOENT: %llu\n"
 656                               "Fid capabilities failed to renew: %llu\n"
 657                               "Fid capabilities renewal retries: %llu\n",
 658                               ll_capa_renewed, ll_capa_renewal_noent,
 659                               ll_capa_renewal_failed, ll_capa_renewal_retries);
 660 }