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 [sun.com URL with a
  20  * copy of GPLv2].
  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  2008 Sun Microsystems, Inc. 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 LIST_HEAD(ll_idle_capas);
  60 static struct ptlrpc_thread ll_capa_thread;
  61 static struct list_head *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 atomic_t ll_capa_debug = 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 (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         spin_lock(&capa_lock);
 102         if (!list_empty(ll_capa_list)) {
 103                 ocapa = list_entry(ll_capa_list->next, struct obd_capa, c_list);
 104                 expired = capa_is_to_expire(ocapa);
 105                 if (!expired)
 106                         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 107         } else if (!list_empty(&ll_idle_capas)) {
 108                 ocapa = list_entry(ll_idle_capas.next, struct obd_capa, c_list);
 109                 expired = capa_is_expired(ocapa);
 110                 if (!expired)
 111                         update_capa_timer(ocapa, ocapa->c_expiry);
 112         }
 113         spin_unlock(&capa_lock);
 114
 115         if (expired)
 116                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "expired");
 117         return expired;
 118 }
 119
 120 static inline int ll_capa_check_stop(void)
 121 {
 122         return (ll_capa_thread.t_flags & SVC_STOPPING) ? 1: 0;
 123 }
 124
 125 static void sort_add_capa(struct obd_capa *ocapa, struct list_head *head)
 126 {
 127         struct obd_capa *tmp;
 128         struct list_head *before = NULL;
 129
 130         /* TODO: client capa is sorted by expiry, this could be optimized */
 131         list_for_each_entry_reverse(tmp, head, c_list) {
 132                 if (cfs_time_aftereq(ocapa->c_expiry, tmp->c_expiry)) {
 133                         before = &tmp->c_list;
 134                         break;
 135                 }
 136         }
 137
 138         LASSERT(&ocapa->c_list != before);
 139         list_add(&ocapa->c_list, before ?: head);
 140 }
 141
 142 static inline int obd_capa_open_count(struct obd_capa *oc)
 143 {
 144         struct ll_inode_info *lli = ll_i2info(oc->u.cli.inode);
 145         return atomic_read(&lli->lli_open_count);
 146 }
 147
 148 static void ll_delete_capa(struct obd_capa *ocapa)
 149 {
 150         struct ll_inode_info *lli = ll_i2info(ocapa->u.cli.inode);
 151
 152         if (capa_for_mds(&ocapa->c_capa)) {
 153                 LASSERT(lli->lli_mds_capa == ocapa);
 154                 lli->lli_mds_capa = NULL;
 155         } else if (capa_for_oss(&ocapa->c_capa)) {
 156                 list_del_init(&ocapa->u.cli.lli_list);
 157         }
 158
 159         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free client");
 160         list_del(&ocapa->c_list);
 161         capa_count[CAPA_SITE_CLIENT]--;
 162         free_capa(ocapa);
 163 }
 164
 165 /* three places where client capa is deleted:
 166  * 1. capa_thread_main(), main place to delete expired capa.
 167  * 2. ll_clear_inode_capas() in ll_clear_inode().
 168  * 3. ll_truncate_free_capa() delete truncate capa explicitly in ll_truncate().
 169  */
 170 static int capa_thread_main(void *unused)
 171 {
 172         struct obd_capa *ocapa, *tmp, *next;
 173         struct inode *inode = NULL;
 174         struct l_wait_info lwi = { 0 };
 175         int rc;
 176         ENTRY;
 177
 178         cfs_daemonize("ll_capa");
 179
 180         ll_capa_thread.t_flags = SVC_RUNNING;
 181         wake_up(&ll_capa_thread.t_ctl_waitq);
 182
 183         while (1) {
 184                 l_wait_event(ll_capa_thread.t_ctl_waitq,
 185                              (ll_capa_check_stop() || have_expired_capa()),
 186                              &lwi);
 187
 188                 if (ll_capa_check_stop())
 189                         break;
 190
 191                 next = NULL;
 192
 193                 spin_lock(&capa_lock);
 194                 list_for_each_entry_safe(ocapa, tmp, ll_capa_list, c_list) {
 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                         if (capa_for_mds(&ocapa->c_capa) &&
 209                             !S_ISDIR(ocapa->u.cli.inode->i_mode) &&
 210                             obd_capa_open_count(ocapa) == 0 &&
 211                             !ll_have_md_lock(ocapa->u.cli.inode,
 212                                              MDS_INODELOCK_LOOKUP)) {
 213                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 214                                            "skip renewal for");
 215                                 sort_add_capa(ocapa, &ll_idle_capas);
 216                                 continue;
 217                         }
 218
 219                         /* for OSS capability, only renew those whose inode is
 220                          * opened.
 221                          */
 222                         if (capa_for_oss(&ocapa->c_capa) &&
 223                             obd_capa_open_count(ocapa) == 0) {
 224                                 /* oss capa with open count == 0 won't renew,
 225                                  * move to idle list */
 226                                 sort_add_capa(ocapa, &ll_idle_capas);
 227                                 continue;
 228                         }
 229
 230                         /* NB iput() is in ll_update_capa() */
 231                         inode = igrab(ocapa->u.cli.inode);
 232                         if (inode == NULL) {
 233                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 234                                            "igrab failed for");
 235                                 continue;
 236                         }
 237
 238                         capa_get(ocapa);
 239                         ll_capa_renewed++;
 240                         spin_unlock(&capa_lock);
 241
 242                         rc = md_renew_capa(ll_i2mdexp(inode), ocapa,
 243                                            ll_update_capa);
 244                         spin_lock(&capa_lock);
 245                         if (rc) {
 246                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 247                                            "renew failed: %d", rc);
 248                                 ll_capa_renewal_failed++;
 249                         }
 250                 }
 251
 252                 if (next)
 253                         update_capa_timer(next, capa_renewal_time(next));
 254
 255                 list_for_each_entry_safe(ocapa, tmp, &ll_idle_capas, c_list) {
 256                         if (!capa_is_expired(ocapa)) {
 257                                 if (!next)
 258                                         update_capa_timer(ocapa, ocapa->c_expiry);
 259                                 break;
 260                         }
 261
 262                         if (atomic_read(&ocapa->c_refc)) {
 263                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 264                                            "expired(c_refc %d), don't release",
 265                                            atomic_read(&ocapa->c_refc));
 266                                 /* don't try to renew any more */
 267                                 list_del_init(&ocapa->c_list);
 268                                 continue;
 269                         }
 270
 271                         /* expired capa is released. */
 272                         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "release expired");
 273                         ll_delete_capa(ocapa);
 274                 }
 275
 276                 spin_unlock(&capa_lock);
 277         }
 278
 279         ll_capa_thread.t_flags = SVC_STOPPED;
 280         wake_up(&ll_capa_thread.t_ctl_waitq);
 281         RETURN(0);
 282 }
 283
 284 void ll_capa_timer_callback(unsigned long unused)
 285 {
 286         wake_up(&ll_capa_thread.t_ctl_waitq);
 287 }
 288
 289 int ll_capa_thread_start(void)
 290 {
 291         int rc;
 292         ENTRY;
 293
 294         init_waitqueue_head(&ll_capa_thread.t_ctl_waitq);
 295
 296         rc = kernel_thread(capa_thread_main, NULL, 0);
 297         if (rc < 0) {
 298                 CERROR("cannot start expired capa thread: rc %d\n", rc);
 299                 RETURN(rc);
 300         }
 301         wait_event(ll_capa_thread.t_ctl_waitq,
 302                    ll_capa_thread.t_flags & SVC_RUNNING);
 303
 304         RETURN(0);
 305 }
 306
 307 void ll_capa_thread_stop(void)
 308 {
 309         ll_capa_thread.t_flags = SVC_STOPPING;
 310         wake_up(&ll_capa_thread.t_ctl_waitq);
 311         wait_event(ll_capa_thread.t_ctl_waitq,
 312                    ll_capa_thread.t_flags & SVC_STOPPED);
 313 }
 314
 315 static struct obd_capa *do_lookup_oss_capa(struct inode *inode, int opc)
 316 {
 317         struct ll_inode_info *lli = ll_i2info(inode);
 318         struct obd_capa *ocapa;
 319
 320         /* inside capa_lock */
 321         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 322                 if ((capa_opc(&ocapa->c_capa) & opc) != opc)
 323                         continue;
 324
 325                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 326                                   ll_inode2fid(inode)));
 327                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 328
 329                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 330                 return ocapa;
 331         }
 332
 333         return NULL;
 334 }
 335
 336 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc)
 337 {
 338         struct ll_inode_info *lli = ll_i2info(inode);
 339         struct obd_capa *ocapa;
 340         int found = 0;
 341
 342         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_OSS_CAPA) == 0)
 343                 return NULL;
 344         ENTRY;
 345
 346         LASSERT(opc == CAPA_OPC_OSS_WRITE || opc == CAPA_OPC_OSS_RW ||
 347                 opc == CAPA_OPC_OSS_TRUNC);
 348
 349         spin_lock(&capa_lock);
 350         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 351                 if (capa_is_expired(ocapa))
 352                         continue;
 353                 if ((opc & CAPA_OPC_OSS_WRITE) &&
 354                     capa_opc_supported(&ocapa->c_capa, CAPA_OPC_OSS_WRITE)) {
 355                         found = 1; break;
 356                 } else if ((opc & CAPA_OPC_OSS_READ) &&
 357                            capa_opc_supported(&ocapa->c_capa,
 358                                               CAPA_OPC_OSS_READ)) {
 359                         found = 1; break;
 360                 } else if ((opc & CAPA_OPC_OSS_TRUNC) &&
 361                            capa_opc_supported(&ocapa->c_capa, opc)) {
 362                         found = 1; break;
 363                 }
 364         }
 365
 366         if (found) {
 367                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 368                                   ll_inode2fid(inode)));
 369                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 370
 371                 capa_get(ocapa);
 372
 373                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 374         } else {
 375                 ocapa = NULL;
 376
 377                 if (atomic_read(&ll_capa_debug)) {
 378                         CERROR("no capability for "DFID" opc "LPX64"\n",
 379                                PFID(&lli->lli_fid), opc);
 380                         atomic_set(&ll_capa_debug, 0);
 381                 }
 382         }
 383         spin_unlock(&capa_lock);
 384
 385         RETURN(ocapa);
 386 }
 387 EXPORT_SYMBOL(ll_osscapa_get);
 388
 389 struct obd_capa *ll_mdscapa_get(struct inode *inode)
 390 {
 391         struct ll_inode_info *lli = ll_i2info(inode);
 392         struct obd_capa *ocapa;
 393         ENTRY;
 394
 395         LASSERT(inode != NULL);
 396
 397         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_MDS_CAPA) == 0)
 398                 RETURN(NULL);
 399
 400         spin_lock(&capa_lock);
 401         ocapa = capa_get(lli->lli_mds_capa);
 402         spin_unlock(&capa_lock);
 403         if (!ocapa && atomic_read(&ll_capa_debug)) {
 404                 CERROR("no mds capability for "DFID"\n", PFID(&lli->lli_fid));
 405                 atomic_set(&ll_capa_debug, 0);
 406         }
 407
 408         RETURN(ocapa);
 409 }
 410
 411 static struct obd_capa *do_add_mds_capa(struct inode *inode,
 412                                         struct obd_capa *ocapa)
 413 {
 414         struct ll_inode_info *lli = ll_i2info(inode);
 415         struct obd_capa *old = lli->lli_mds_capa;
 416         struct lustre_capa *capa = &ocapa->c_capa;
 417
 418         if (!old) {
 419                 ocapa->u.cli.inode = inode;
 420                 lli->lli_mds_capa = ocapa;
 421                 capa_count[CAPA_SITE_CLIENT]++;
 422
 423                 DEBUG_CAPA(D_SEC, capa, "add MDS");
 424         } else {
 425                 spin_lock(&old->c_lock);
 426                 old->c_capa = *capa;
 427                 spin_unlock(&old->c_lock);
 428
 429                 DEBUG_CAPA(D_SEC, capa, "update MDS");
 430
 431                 free_capa(ocapa);
 432                 ocapa = old;
 433         }
 434         return ocapa;
 435 }
 436
 437 static inline void inode_add_oss_capa(struct inode *inode,
 438                                       struct obd_capa *ocapa)
 439 {
 440         struct ll_inode_info *lli = ll_i2info(inode);
 441         struct obd_capa *tmp;
 442         struct list_head *next = NULL;
 443
 444         /* capa is sorted in lli_oss_capas so lookup can always find the
 445          * latest one */
 446         list_for_each_entry(tmp, &lli->lli_oss_capas, u.cli.lli_list) {
 447                 if (cfs_time_after(ocapa->c_expiry, tmp->c_expiry)) {
 448                         next = &tmp->u.cli.lli_list;
 449                         break;
 450                 }
 451         }
 452         LASSERT(&ocapa->u.cli.lli_list != next);
 453         list_move_tail(&ocapa->u.cli.lli_list, next ?: &lli->lli_oss_capas);
 454 }
 455
 456 static struct obd_capa *do_add_oss_capa(struct inode *inode,
 457                                         struct obd_capa *ocapa)
 458 {
 459         struct obd_capa *old;
 460         struct lustre_capa *capa = &ocapa->c_capa;
 461
 462         LASSERTF(S_ISREG(inode->i_mode),
 463                  "inode has oss capa, but not regular file, mode: %d\n",
 464                  inode->i_mode);
 465
 466         /* FIXME: can't replace it so easily with fine-grained opc */
 467         old = do_lookup_oss_capa(inode, capa_opc(capa) & CAPA_OPC_OSS_ONLY);
 468         if (!old) {
 469                 ocapa->u.cli.inode = inode;
 470                 INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
 471                 capa_count[CAPA_SITE_CLIENT]++;
 472
 473                 DEBUG_CAPA(D_SEC, capa, "add OSS");
 474         } else {
 475                 spin_lock(&old->c_lock);
 476                 old->c_capa = *capa;
 477                 spin_unlock(&old->c_lock);
 478
 479                 DEBUG_CAPA(D_SEC, capa, "update OSS");
 480
 481                 free_capa(ocapa);
 482                 ocapa = old;
 483         }
 484
 485         inode_add_oss_capa(inode, ocapa);
 486         return ocapa;
 487 }
 488
 489 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa)
 490 {
 491         spin_lock(&capa_lock);
 492         ocapa = capa_for_mds(&ocapa->c_capa) ? do_add_mds_capa(inode, ocapa) :
 493                                                do_add_oss_capa(inode, ocapa);
 494
 495         /* truncate capa won't renew */
 496         if (ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC) {
 497                 set_capa_expiry(ocapa);
 498                 list_del(&ocapa->c_list);
 499                 sort_add_capa(ocapa, ll_capa_list);
 500
 501                 update_capa_timer(ocapa, capa_renewal_time(ocapa));
 502         }
 503
 504         spin_unlock(&capa_lock);
 505
 506         atomic_set(&ll_capa_debug, 1);
 507         return ocapa;
 508 }
 509
 510 static inline void delay_capa_renew(struct obd_capa *oc, cfs_time_t delay)
 511 {
 512         /* NB: set a fake expiry for this capa to prevent it renew too soon */
 513         oc->c_expiry = cfs_time_add(oc->c_expiry, cfs_time_seconds(delay));
 514 }
 515
 516 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa)
 517 {
 518         struct inode *inode = ocapa->u.cli.inode;
 519         int rc = 0;
 520         ENTRY;
 521
 522         LASSERT(ocapa);
 523
 524         if (IS_ERR(capa)) {
 525                 /* set error code */
 526                 rc = PTR_ERR(capa);
 527                 spin_lock(&capa_lock);
 528                 if (rc == -ENOENT) {
 529                         DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 530                                    "renewal canceled because object removed");
 531                         ll_capa_renewal_noent++;
 532                 } else {
 533                         ll_capa_renewal_failed++;
 534
 535                         /* failed capa won't be renewed any longer, but if -EIO,
 536                          * client might be doing recovery, retry in 2 min. */
 537                         if (rc == -EIO && !capa_is_expired(ocapa)) {
 538                                 delay_capa_renew(ocapa, 120);
 539                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 540                                            "renewal failed: -EIO, retry in 2 mins");
 541                                 ll_capa_renewal_retries++;
 542                                 GOTO(retry, rc);
 543                         } else {
 544                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 545                                            "renewal failed(rc: %d) for", rc);
 546                         }
 547                 }
 548
 549                 list_del(&ocapa->c_list);
 550                 sort_add_capa(ocapa, &ll_idle_capas);
 551                 spin_unlock(&capa_lock);
 552
 553                 capa_put(ocapa);
 554                 iput(inode);
 555                 return rc;
 556         }
 557
 558         spin_lock(&ocapa->c_lock);
 559         LASSERT(!memcmp(&ocapa->c_capa, capa,
 560                         offsetof(struct lustre_capa, lc_flags)));
 561         ocapa->c_capa = *capa;
 562         set_capa_expiry(ocapa);
 563         spin_unlock(&ocapa->c_lock);
 564
 565         spin_lock(&capa_lock);
 566         if (capa_for_oss(capa))
 567                 inode_add_oss_capa(inode, ocapa);
 568         DEBUG_CAPA(D_SEC, capa, "renew");
 569         EXIT;
 570 retry:
 571         list_del_init(&ocapa->c_list);
 572         sort_add_capa(ocapa, ll_capa_list);
 573         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 574         spin_unlock(&capa_lock);
 575
 576         capa_put(ocapa);
 577         iput(inode);
 578         return rc;
 579 }
 580
 581 void ll_capa_open(struct inode *inode)
 582 {
 583         struct ll_inode_info *lli = ll_i2info(inode);
 584
 585         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 586             == 0)
 587                 return;
 588
 589         if (!S_ISREG(inode->i_mode))
 590                 return;
 591
 592         atomic_inc(&lli->lli_open_count);
 593 }
 594
 595 void ll_capa_close(struct inode *inode)
 596 {
 597         struct ll_inode_info *lli = ll_i2info(inode);
 598
 599         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 600             == 0)
 601                 return;
 602
 603         if (!S_ISREG(inode->i_mode))
 604                 return;
 605
 606         atomic_dec(&lli->lli_open_count);
 607 }
 608
 609 /* delete CAPA_OPC_OSS_TRUNC only */
 610 void ll_truncate_free_capa(struct obd_capa *ocapa)
 611 {
 612         if (!ocapa)
 613                 return;
 614
 615         LASSERT(ocapa->c_capa.lc_opc & CAPA_OPC_OSS_TRUNC);
 616         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free truncate");
 617
 618         capa_put(ocapa);
 619         spin_lock(&capa_lock);
 620         ll_delete_capa(ocapa);
 621         spin_unlock(&capa_lock);
 622 }
 623
 624 void ll_clear_inode_capas(struct inode *inode)
 625 {
 626         struct ll_inode_info *lli = ll_i2info(inode);
 627         struct obd_capa *ocapa, *tmp;
 628
 629         spin_lock(&capa_lock);
 630         ocapa = lli->lli_mds_capa;
 631         if (ocapa)
 632                 ll_delete_capa(ocapa);
 633
 634         list_for_each_entry_safe(ocapa, tmp, &lli->lli_oss_capas,
 635                                  u.cli.lli_list)
 636                 ll_delete_capa(ocapa);
 637         spin_unlock(&capa_lock);
 638 }
 639
 640 void ll_print_capa_stat(struct ll_sb_info *sbi)
 641 {
 642         if (sbi->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 643                 LCONSOLE_INFO("Fid capabilities renewed: %llu\n"
 644                               "Fid capabilities renewal ENOENT: %llu\n"
 645                               "Fid capabilities failed to renew: %llu\n"
 646                               "Fid capabilities renewal retries: %llu\n",
 647                               ll_capa_renewed, ll_capa_renewal_noent,
 648                               ll_capa_renewal_failed, ll_capa_renewal_retries);
 649 }