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  * Copyright (C) 2005 Cluster File Systems, Inc.
   5  *
   6  * Author: Lai Siyao <lsy@clusterfs.com>
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #define DEBUG_SUBSYSTEM S_LLITE
  25
  26 #include <linux/fs.h>
  27 #include <linux/version.h>
  28 #include <asm/uaccess.h>
  29 #include <linux/file.h>
  30 #include <linux/kmod.h>
  31
  32 #include <lustre_lite.h>
  33 #include "llite_internal.h"
  34
  35 /* for obd_capa.c_list, client capa might stay in three places:
  36  * 1. ll_capa_list.
  37  * 2. ll_idle_capas.
  38  * 3. stand alone: just allocated.
  39  */
  40
  41 /* capas for oss writeback and those failed to renew */
  42 static LIST_HEAD(ll_idle_capas);
  43 static struct ptlrpc_thread ll_capa_thread;
  44 static struct list_head *ll_capa_list = &capa_list[CAPA_SITE_CLIENT];
  45
  46 /* llite capa renewal timer */
  47 struct timer_list ll_capa_timer;
  48 /* for debug: indicate whether capa on llite is enabled or not */
  49 static atomic_t ll_capa_debug = ATOMIC_INIT(0);
  50 static unsigned long long ll_capa_renewed = 0;
  51 static unsigned long long ll_capa_renewal_noent = 0;
  52 static unsigned long long ll_capa_renewal_failed = 0;
  53 static unsigned long long ll_capa_renewal_retries = 0;
  54
  55 static inline void update_capa_timer(struct obd_capa *ocapa, cfs_time_t expiry)
  56 {
  57         if (time_before(expiry, ll_capa_timer.expires) ||
  58             !timer_pending(&ll_capa_timer)) {
  59                 mod_timer(&ll_capa_timer, expiry);
  60                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
  61                            "ll_capa_timer update: %lu/%lu by", expiry, jiffies);
  62         }
  63 }
  64
  65 static inline cfs_time_t capa_renewal_time(struct obd_capa *ocapa)
  66 {
  67         return cfs_time_sub(ocapa->c_expiry,
  68                             cfs_time_seconds(ocapa->c_capa.lc_timeout) / 2);
  69 }
  70
  71 static inline int capa_is_to_expire(struct obd_capa *ocapa)
  72 {
  73         return cfs_time_beforeq(capa_renewal_time(ocapa), cfs_time_current());
  74 }
  75
  76 static inline int have_expired_capa(void)
  77 {
  78         struct obd_capa *ocapa = NULL;
  79         int expired = 0;
  80
  81         /* if ll_capa_list has client capa to expire or ll_idle_capas has
  82          * expired capa, return 1.
  83          */
  84         spin_lock(&capa_lock);
  85         if (!list_empty(ll_capa_list)) {
  86                 ocapa = list_entry(ll_capa_list->next, struct obd_capa, c_list);
  87                 expired = capa_is_to_expire(ocapa);
  88                 if (!expired)
  89                         update_capa_timer(ocapa, capa_renewal_time(ocapa));
  90         } else if (!list_empty(&ll_idle_capas)) {
  91                 ocapa = list_entry(ll_idle_capas.next, struct obd_capa, c_list);
  92                 expired = capa_is_expired(ocapa);
  93                 if (!expired)
  94                         update_capa_timer(ocapa, ocapa->c_expiry);
  95         }
  96         spin_unlock(&capa_lock);
  97
  98         if (expired)
  99                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "expired");
 100         return expired;
 101 }
 102
 103 static inline int ll_capa_check_stop(void)
 104 {
 105         return (ll_capa_thread.t_flags & SVC_STOPPING) ? 1: 0;
 106 }
 107
 108 static void sort_add_capa(struct obd_capa *ocapa, struct list_head *head)
 109 {
 110         struct obd_capa *tmp;
 111         struct list_head *before = NULL;
 112
 113         /* TODO: client capa is sorted by expiry, this could be optimized */
 114         list_for_each_entry_reverse(tmp, head, c_list) {
 115                 if (cfs_time_aftereq(ocapa->c_expiry, tmp->c_expiry)) {
 116                         before = &tmp->c_list;
 117                         break;
 118                 }
 119         }
 120
 121         LASSERT(&ocapa->c_list != before);
 122         list_add(&ocapa->c_list, before ?: head);
 123 }
 124
 125 static inline int obd_capa_open_count(struct obd_capa *oc)
 126 {
 127         struct ll_inode_info *lli = ll_i2info(oc->u.cli.inode);
 128         return atomic_read(&lli->lli_open_count);
 129 }
 130
 131 static void ll_delete_capa(struct obd_capa *ocapa)
 132 {
 133         struct ll_inode_info *lli = ll_i2info(ocapa->u.cli.inode);
 134
 135         if (capa_for_mds(&ocapa->c_capa)) {
 136                 LASSERT(lli->lli_mds_capa == ocapa);
 137                 lli->lli_mds_capa = NULL;
 138         } else if (capa_for_oss(&ocapa->c_capa)) {
 139                 list_del_init(&ocapa->u.cli.lli_list);
 140         }
 141
 142         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free client");
 143         list_del(&ocapa->c_list);
 144         capa_count[CAPA_SITE_CLIENT]--;
 145         free_capa(ocapa);
 146 }
 147
 148 /* three places where client capa is deleted:
 149  * 1. capa_thread_main(), main place to delete expired capa.
 150  * 2. ll_clear_inode_capas() in ll_clear_inode().
 151  * 3. ll_truncate_free_capa() delete truncate capa explicitly in ll_truncate().
 152  */
 153 static int capa_thread_main(void *unused)
 154 {
 155         struct obd_capa *ocapa, *tmp, *next;
 156         struct inode *inode = NULL;
 157         struct l_wait_info lwi = { 0 };
 158         int rc;
 159         ENTRY;
 160
 161         cfs_daemonize("ll_capa");
 162
 163         ll_capa_thread.t_flags = SVC_RUNNING;
 164         wake_up(&ll_capa_thread.t_ctl_waitq);
 165
 166         while (1) {
 167                 l_wait_event(ll_capa_thread.t_ctl_waitq,
 168                              (ll_capa_check_stop() || have_expired_capa()),
 169                              &lwi);
 170
 171                 if (ll_capa_check_stop())
 172                         break;
 173
 174                 next = NULL;
 175
 176                 spin_lock(&capa_lock);
 177                 list_for_each_entry_safe(ocapa, tmp, ll_capa_list, c_list) {
 178                         LASSERT(ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC);
 179
 180                         if (!capa_is_to_expire(ocapa)) {
 181                                 next = ocapa;
 182                                 break;
 183                         }
 184
 185                         list_del_init(&ocapa->c_list);
 186
 187                         /* for MDS capability, only renew those which belong to
 188                          * dir, or its inode is opened, or client holds LOOKUP
 189                          * lock.
 190                          */
 191                         if (capa_for_mds(&ocapa->c_capa) &&
 192                             !S_ISDIR(ocapa->u.cli.inode->i_mode) &&
 193                             obd_capa_open_count(ocapa) == 0 &&
 194                             !ll_have_md_lock(ocapa->u.cli.inode,
 195                                              MDS_INODELOCK_LOOKUP)) {
 196                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 197                                            "skip renewal for");
 198                                 sort_add_capa(ocapa, &ll_idle_capas);
 199                                 continue;
 200                         }
 201
 202                         /* for OSS capability, only renew those whose inode is
 203                          * opened.
 204                          */
 205                         if (capa_for_oss(&ocapa->c_capa) &&
 206                             obd_capa_open_count(ocapa) == 0) {
 207                                 /* oss capa with open count == 0 won't renew,
 208                                  * move to idle list */
 209                                 sort_add_capa(ocapa, &ll_idle_capas);
 210                                 continue;
 211                         }
 212
 213                         /* NB iput() is in ll_update_capa() */
 214                         inode = igrab(ocapa->u.cli.inode);
 215                         if (inode == NULL) {
 216                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 217                                            "igrab failed for");
 218                                 continue;
 219                         }
 220
 221                         capa_get(ocapa);
 222                         ll_capa_renewed++;
 223                         spin_unlock(&capa_lock);
 224
 225                         rc = md_renew_capa(ll_i2mdexp(inode), ocapa,
 226                                            ll_update_capa);
 227                         spin_lock(&capa_lock);
 228                         if (rc) {
 229                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 230                                            "renew failed: %d", rc);
 231                                 ll_capa_renewal_failed++;
 232                         }
 233                 }
 234
 235                 if (next)
 236                         update_capa_timer(next, capa_renewal_time(next));
 237
 238                 list_for_each_entry_safe(ocapa, tmp, &ll_idle_capas, c_list) {
 239                         if (!capa_is_expired(ocapa)) {
 240                                 if (!next)
 241                                         update_capa_timer(ocapa, ocapa->c_expiry);
 242                                 break;
 243                         }
 244
 245                         if (atomic_read(&ocapa->c_refc)) {
 246                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 247                                            "expired(c_refc %d), don't release",
 248                                            atomic_read(&ocapa->c_refc));
 249                                 /* don't try to renew any more */
 250                                 list_del_init(&ocapa->c_list);
 251                                 continue;
 252                         }
 253
 254                         /* expired capa is released. */
 255                         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "release expired");
 256                         ll_delete_capa(ocapa);
 257                 }
 258
 259                 spin_unlock(&capa_lock);
 260         }
 261
 262         ll_capa_thread.t_flags = SVC_STOPPED;
 263         wake_up(&ll_capa_thread.t_ctl_waitq);
 264         RETURN(0);
 265 }
 266
 267 void ll_capa_timer_callback(unsigned long unused)
 268 {
 269         wake_up(&ll_capa_thread.t_ctl_waitq);
 270 }
 271
 272 int ll_capa_thread_start(void)
 273 {
 274         int rc;
 275         ENTRY;
 276
 277         init_waitqueue_head(&ll_capa_thread.t_ctl_waitq);
 278
 279         rc = kernel_thread(capa_thread_main, NULL, 0);
 280         if (rc < 0) {
 281                 CERROR("cannot start expired capa thread: rc %d\n", rc);
 282                 RETURN(rc);
 283         }
 284         wait_event(ll_capa_thread.t_ctl_waitq,
 285                    ll_capa_thread.t_flags & SVC_RUNNING);
 286
 287         RETURN(0);
 288 }
 289
 290 void ll_capa_thread_stop(void)
 291 {
 292         ll_capa_thread.t_flags = SVC_STOPPING;
 293         wake_up(&ll_capa_thread.t_ctl_waitq);
 294         wait_event(ll_capa_thread.t_ctl_waitq,
 295                    ll_capa_thread.t_flags & SVC_STOPPED);
 296 }
 297
 298 static struct obd_capa *do_lookup_oss_capa(struct inode *inode, uid_t uid,
 299                                            int opc)
 300 {
 301         struct ll_inode_info *lli = ll_i2info(inode);
 302         struct obd_capa *ocapa;
 303
 304         /* inside capa_lock */
 305         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 306                 if (uid != capa_uid(&ocapa->c_capa))
 307                         continue;
 308                 if ((capa_opc(&ocapa->c_capa) & opc) != opc)
 309                         continue;
 310
 311                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 312                                   ll_inode2fid(inode)));
 313                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 314
 315                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 316                 return ocapa;
 317         }
 318
 319         return NULL;
 320 }
 321
 322 /* FIXME: once uid is 0, this is mmaped IO, or fsync, truncate. */
 323 struct obd_capa *ll_osscapa_get(struct inode *inode, uid_t uid, __u64 opc)
 324 {
 325         struct ll_inode_info *lli = ll_i2info(inode);
 326         struct obd_capa *ocapa;
 327         int found = 0;
 328
 329         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_OSS_CAPA) == 0)
 330                 return NULL;
 331         ENTRY;
 332
 333         LASSERT(opc == CAPA_OPC_OSS_WRITE || opc == CAPA_OPC_OSS_RW ||
 334                 opc == CAPA_OPC_OSS_TRUNC);
 335
 336         spin_lock(&capa_lock);
 337         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 338                 if (capa_is_expired(ocapa))
 339                         continue;
 340                 if (uid != 0 && uid != capa_uid(&ocapa->c_capa))
 341                         continue;
 342                 if ((opc & CAPA_OPC_OSS_WRITE) &&
 343                     capa_opc_supported(&ocapa->c_capa, CAPA_OPC_OSS_WRITE)) {
 344                         found = 1; break;
 345                 } else if ((opc & CAPA_OPC_OSS_READ) &&
 346                            capa_opc_supported(&ocapa->c_capa,
 347                                               CAPA_OPC_OSS_READ)) {
 348                         found = 1; break;
 349                 } else if ((opc & CAPA_OPC_OSS_TRUNC) &&
 350                            capa_opc_supported(&ocapa->c_capa, opc)) {
 351                         found = 1; break;
 352                 }
 353         }
 354
 355         if (found) {
 356                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 357                                   ll_inode2fid(inode)));
 358                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 359
 360                 capa_get(ocapa);
 361
 362                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 363         } else {
 364                 ocapa = NULL;
 365
 366                 if (atomic_read(&ll_capa_debug)) {
 367                         CERROR("no capability for "DFID" opc "LPX64"\n",
 368                                PFID(&lli->lli_fid), opc);
 369                         atomic_set(&ll_capa_debug, 0);
 370                 }
 371         }
 372         spin_unlock(&capa_lock);
 373
 374         RETURN(ocapa);
 375 }
 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                 free_capa(ocapa);
 420                 ocapa = old;
 421         }
 422         return ocapa;
 423 }
 424
 425 static inline void inode_add_oss_capa(struct inode *inode,
 426                                       struct obd_capa *ocapa)
 427 {
 428         struct ll_inode_info *lli = ll_i2info(inode);
 429         struct obd_capa *tmp;
 430         struct list_head *next = NULL;
 431
 432         /* capa is sorted in lli_oss_capas so lookup can always find the
 433          * latest one */
 434         list_for_each_entry(tmp, &lli->lli_oss_capas, u.cli.lli_list) {
 435                 if (cfs_time_after(ocapa->c_expiry, tmp->c_expiry)) {
 436                         next = &tmp->u.cli.lli_list;
 437                         break;
 438                 }
 439         }
 440         LASSERT(&ocapa->u.cli.lli_list != next);
 441         list_move_tail(&ocapa->u.cli.lli_list, next ?: &lli->lli_oss_capas);
 442 }
 443
 444 static struct obd_capa *do_add_oss_capa(struct inode *inode,
 445                                         struct obd_capa *ocapa)
 446 {
 447         struct obd_capa *old;
 448         struct lustre_capa *capa = &ocapa->c_capa;
 449
 450         LASSERTF(S_ISREG(inode->i_mode),
 451                  "inode has oss capa, but not regular file, mode: %d\n",
 452                  inode->i_mode);
 453
 454         /* FIXME: can't replace it so easily with fine-grained opc */
 455         old = do_lookup_oss_capa(inode, capa_uid(capa),
 456                                  capa_opc(capa) & CAPA_OPC_OSS_ONLY);
 457         if (!old) {
 458                 ocapa->u.cli.inode = inode;
 459                 INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
 460                 capa_count[CAPA_SITE_CLIENT]++;
 461
 462                 DEBUG_CAPA(D_SEC, capa, "add OSS");
 463         } else {
 464                 spin_lock(&old->c_lock);
 465                 old->c_capa = *capa;
 466                 spin_unlock(&old->c_lock);
 467
 468                 DEBUG_CAPA(D_SEC, capa, "update OSS");
 469
 470                 free_capa(ocapa);
 471                 ocapa = old;
 472         }
 473
 474         inode_add_oss_capa(inode, ocapa);
 475         return ocapa;
 476 }
 477
 478 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa)
 479 {
 480         spin_lock(&capa_lock);
 481         ocapa = capa_for_mds(&ocapa->c_capa) ? do_add_mds_capa(inode, ocapa) :
 482                                                do_add_oss_capa(inode, ocapa);
 483
 484         /* truncate capa won't renew */
 485         if (ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC) {
 486                 set_capa_expiry(ocapa);
 487                 list_del(&ocapa->c_list);
 488                 sort_add_capa(ocapa, ll_capa_list);
 489
 490                 update_capa_timer(ocapa, capa_renewal_time(ocapa));
 491         }
 492
 493         spin_unlock(&capa_lock);
 494
 495         atomic_set(&ll_capa_debug, 1);
 496         return ocapa;
 497 }
 498
 499 static inline void delay_capa_renew(struct obd_capa *oc, cfs_time_t delay)
 500 {
 501         /* NB: set a fake expiry for this capa to prevent it renew too soon */
 502         oc->c_expiry = cfs_time_add(oc->c_expiry, cfs_time_seconds(delay));
 503 }
 504
 505 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa)
 506 {
 507         struct inode *inode = ocapa->u.cli.inode;
 508         int rc = 0;
 509         ENTRY;
 510
 511         LASSERT(ocapa);
 512
 513         if (IS_ERR(capa)) {
 514                 /* set error code */
 515                 rc = PTR_ERR(capa);
 516                 spin_lock(&capa_lock);
 517                 if (rc == -ENOENT) {
 518                         DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 519                                    "renewal canceled because object removed");
 520                         ll_capa_renewal_noent++;
 521                 } else {
 522                         ll_capa_renewal_failed++;
 523
 524                         /* failed capa won't be renewed any longer, but if -EIO,
 525                          * client might be doing recovery, retry in 2 min. */
 526                         if (rc == -EIO && !capa_is_expired(ocapa)) {
 527                                 delay_capa_renew(ocapa, 120);
 528                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 529                                            "renewal failed: -EIO, retry in 2 mins");
 530                                 ll_capa_renewal_retries++;
 531                                 GOTO(retry, rc);
 532                         } else {
 533                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 534                                            "renewal failed(rc: %d) for", rc);
 535                         }
 536                 }
 537
 538                 list_del(&ocapa->c_list);
 539                 sort_add_capa(ocapa, &ll_idle_capas);
 540                 spin_unlock(&capa_lock);
 541
 542                 capa_put(ocapa);
 543                 iput(inode);
 544                 return rc;
 545         }
 546
 547         spin_lock(&ocapa->c_lock);
 548         LASSERT(!memcmp(&ocapa->c_capa, capa,
 549                         offsetof(struct lustre_capa, lc_flags)));
 550         ocapa->c_capa = *capa;
 551         set_capa_expiry(ocapa);
 552         spin_unlock(&ocapa->c_lock);
 553
 554         spin_lock(&capa_lock);
 555         if (capa_for_oss(capa))
 556                 inode_add_oss_capa(inode, ocapa);
 557         DEBUG_CAPA(D_SEC, capa, "renew");
 558         EXIT;
 559 retry:
 560         list_del_init(&ocapa->c_list);
 561         sort_add_capa(ocapa, ll_capa_list);
 562         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 563         spin_unlock(&capa_lock);
 564
 565         capa_put(ocapa);
 566         iput(inode);
 567         return rc;
 568 }
 569
 570 void ll_capa_open(struct inode *inode)
 571 {
 572         struct ll_inode_info *lli = ll_i2info(inode);
 573
 574         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 575             == 0)
 576                 return;
 577
 578         if (!S_ISREG(inode->i_mode))
 579                 return;
 580
 581         atomic_inc(&lli->lli_open_count);
 582 }
 583
 584 void ll_capa_close(struct inode *inode)
 585 {
 586         struct ll_inode_info *lli = ll_i2info(inode);
 587
 588         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 589             == 0)
 590                 return;
 591
 592         if (!S_ISREG(inode->i_mode))
 593                 return;
 594
 595         atomic_dec(&lli->lli_open_count);
 596 }
 597
 598 /* delete CAPA_OPC_OSS_TRUNC only */
 599 void ll_truncate_free_capa(struct obd_capa *ocapa)
 600 {
 601         if (!ocapa)
 602                 return;
 603
 604         LASSERT(ocapa->c_capa.lc_opc & CAPA_OPC_OSS_TRUNC);
 605         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free truncate");
 606
 607         capa_put(ocapa);
 608         spin_lock(&capa_lock);
 609         ll_delete_capa(ocapa);
 610         spin_unlock(&capa_lock);
 611 }
 612
 613 void ll_clear_inode_capas(struct inode *inode)
 614 {
 615         struct ll_inode_info *lli = ll_i2info(inode);
 616         struct obd_capa *ocapa, *tmp;
 617
 618         spin_lock(&capa_lock);
 619         ocapa = lli->lli_mds_capa;
 620         if (ocapa)
 621                 ll_delete_capa(ocapa);
 622
 623         list_for_each_entry_safe(ocapa, tmp, &lli->lli_oss_capas,
 624                                  u.cli.lli_list)
 625                 ll_delete_capa(ocapa);
 626         spin_unlock(&capa_lock);
 627 }
 628
 629 void ll_print_capa_stat(struct ll_sb_info *sbi)
 630 {
 631         if (sbi->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 632                 LCONSOLE_INFO("Fid capabilities renewed: %llu\n"
 633                               "Fid capabilities renewal ENOENT: %llu\n"
 634                               "Fid capabilities failed to renew: %llu\n"
 635                               "Fid capabilities renewal retries: %llu\n",
 636                               ll_capa_renewed, ll_capa_renewal_noent,
 637                               ll_capa_renewal_failed, ll_capa_renewal_retries);
 638 }