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  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         ENTRY;
 343
 344         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_OSS_CAPA) == 0)
 345                 RETURN(NULL);
 346
 347         LASSERT(opc == CAPA_OPC_OSS_WRITE || opc == CAPA_OPC_OSS_RW ||
 348                 opc == CAPA_OPC_OSS_TRUNC);
 349
 350         spin_lock(&capa_lock);
 351         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 352                 if (capa_is_expired(ocapa))
 353                         continue;
 354                 if ((opc & CAPA_OPC_OSS_WRITE) &&
 355                     capa_opc_supported(&ocapa->c_capa, CAPA_OPC_OSS_WRITE)) {
 356                         found = 1; break;
 357                 } else if ((opc & CAPA_OPC_OSS_READ) &&
 358                            capa_opc_supported(&ocapa->c_capa,
 359                                               CAPA_OPC_OSS_READ)) {
 360                         found = 1; break;
 361                 } else if ((opc & CAPA_OPC_OSS_TRUNC) &&
 362                            capa_opc_supported(&ocapa->c_capa, opc)) {
 363                         found = 1; break;
 364                 }
 365         }
 366
 367         if (found) {
 368                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 369                                   ll_inode2fid(inode)));
 370                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 371
 372                 capa_get(ocapa);
 373
 374                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 375         } else {
 376                 ocapa = NULL;
 377
 378                 if (atomic_read(&ll_capa_debug)) {
 379                         CERROR("no capability for "DFID" opc "LPX64"\n",
 380                                PFID(&lli->lli_fid), opc);
 381                         atomic_set(&ll_capa_debug, 0);
 382                 }
 383         }
 384         spin_unlock(&capa_lock);
 385
 386         RETURN(ocapa);
 387 }
 388 EXPORT_SYMBOL(ll_osscapa_get);
 389
 390 struct obd_capa *ll_mdscapa_get(struct inode *inode)
 391 {
 392         struct ll_inode_info *lli = ll_i2info(inode);
 393         struct obd_capa *ocapa;
 394         ENTRY;
 395
 396         LASSERT(inode != NULL);
 397
 398         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_MDS_CAPA) == 0)
 399                 RETURN(NULL);
 400
 401         spin_lock(&capa_lock);
 402         ocapa = capa_get(lli->lli_mds_capa);
 403         spin_unlock(&capa_lock);
 404         if (!ocapa && atomic_read(&ll_capa_debug)) {
 405                 CERROR("no mds capability for "DFID"\n", PFID(&lli->lli_fid));
 406                 atomic_set(&ll_capa_debug, 0);
 407         }
 408
 409         RETURN(ocapa);
 410 }
 411
 412 static struct obd_capa *do_add_mds_capa(struct inode *inode,
 413                                         struct obd_capa *ocapa)
 414 {
 415         struct ll_inode_info *lli = ll_i2info(inode);
 416         struct obd_capa *old = lli->lli_mds_capa;
 417         struct lustre_capa *capa = &ocapa->c_capa;
 418
 419         if (!old) {
 420                 ocapa->u.cli.inode = inode;
 421                 lli->lli_mds_capa = ocapa;
 422                 capa_count[CAPA_SITE_CLIENT]++;
 423
 424                 DEBUG_CAPA(D_SEC, capa, "add MDS");
 425         } else {
 426                 spin_lock(&old->c_lock);
 427                 old->c_capa = *capa;
 428                 spin_unlock(&old->c_lock);
 429
 430                 DEBUG_CAPA(D_SEC, capa, "update MDS");
 431
 432                 free_capa(ocapa);
 433                 ocapa = old;
 434         }
 435         return ocapa;
 436 }
 437
 438 static inline void inode_add_oss_capa(struct inode *inode,
 439                                       struct obd_capa *ocapa)
 440 {
 441         struct ll_inode_info *lli = ll_i2info(inode);
 442         struct obd_capa *tmp;
 443         struct list_head *next = NULL;
 444
 445         /* capa is sorted in lli_oss_capas so lookup can always find the
 446          * latest one */
 447         list_for_each_entry(tmp, &lli->lli_oss_capas, u.cli.lli_list) {
 448                 if (cfs_time_after(ocapa->c_expiry, tmp->c_expiry)) {
 449                         next = &tmp->u.cli.lli_list;
 450                         break;
 451                 }
 452         }
 453         LASSERT(&ocapa->u.cli.lli_list != next);
 454         list_move_tail(&ocapa->u.cli.lli_list, next ?: &lli->lli_oss_capas);
 455 }
 456
 457 static struct obd_capa *do_add_oss_capa(struct inode *inode,
 458                                         struct obd_capa *ocapa)
 459 {
 460         struct obd_capa *old;
 461         struct lustre_capa *capa = &ocapa->c_capa;
 462
 463         LASSERTF(S_ISREG(inode->i_mode),
 464                  "inode has oss capa, but not regular file, mode: %d\n",
 465                  inode->i_mode);
 466
 467         /* FIXME: can't replace it so easily with fine-grained opc */
 468         old = do_lookup_oss_capa(inode, capa_opc(capa) & CAPA_OPC_OSS_ONLY);
 469         if (!old) {
 470                 ocapa->u.cli.inode = inode;
 471                 INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
 472                 capa_count[CAPA_SITE_CLIENT]++;
 473
 474                 DEBUG_CAPA(D_SEC, capa, "add OSS");
 475         } else {
 476                 spin_lock(&old->c_lock);
 477                 old->c_capa = *capa;
 478                 spin_unlock(&old->c_lock);
 479
 480                 DEBUG_CAPA(D_SEC, capa, "update OSS");
 481
 482                 free_capa(ocapa);
 483                 ocapa = old;
 484         }
 485
 486         inode_add_oss_capa(inode, ocapa);
 487         return ocapa;
 488 }
 489
 490 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa)
 491 {
 492         spin_lock(&capa_lock);
 493         ocapa = capa_for_mds(&ocapa->c_capa) ? do_add_mds_capa(inode, ocapa) :
 494                                                do_add_oss_capa(inode, ocapa);
 495
 496         /* truncate capa won't renew */
 497         if (ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC) {
 498                 set_capa_expiry(ocapa);
 499                 list_del(&ocapa->c_list);
 500                 sort_add_capa(ocapa, ll_capa_list);
 501
 502                 update_capa_timer(ocapa, capa_renewal_time(ocapa));
 503         }
 504
 505         spin_unlock(&capa_lock);
 506
 507         atomic_set(&ll_capa_debug, 1);
 508         return ocapa;
 509 }
 510
 511 static inline void delay_capa_renew(struct obd_capa *oc, cfs_time_t delay)
 512 {
 513         /* NB: set a fake expiry for this capa to prevent it renew too soon */
 514         oc->c_expiry = cfs_time_add(oc->c_expiry, cfs_time_seconds(delay));
 515 }
 516
 517 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa)
 518 {
 519         struct inode *inode = ocapa->u.cli.inode;
 520         int rc = 0;
 521         ENTRY;
 522
 523         LASSERT(ocapa);
 524
 525         if (IS_ERR(capa)) {
 526                 /* set error code */
 527                 rc = PTR_ERR(capa);
 528                 spin_lock(&capa_lock);
 529                 if (rc == -ENOENT) {
 530                         DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 531                                    "renewal canceled because object removed");
 532                         ll_capa_renewal_noent++;
 533                 } else {
 534                         ll_capa_renewal_failed++;
 535
 536                         /* failed capa won't be renewed any longer, but if -EIO,
 537                          * client might be doing recovery, retry in 2 min. */
 538                         if (rc == -EIO && !capa_is_expired(ocapa)) {
 539                                 delay_capa_renew(ocapa, 120);
 540                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 541                                            "renewal failed: -EIO, retry in 2 mins");
 542                                 ll_capa_renewal_retries++;
 543                                 GOTO(retry, rc);
 544                         } else {
 545                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 546                                            "renewal failed(rc: %d) for", rc);
 547                         }
 548                 }
 549
 550                 list_del(&ocapa->c_list);
 551                 sort_add_capa(ocapa, &ll_idle_capas);
 552                 spin_unlock(&capa_lock);
 553
 554                 capa_put(ocapa);
 555                 iput(inode);
 556                 return rc;
 557         }
 558
 559         spin_lock(&ocapa->c_lock);
 560         LASSERT(!memcmp(&ocapa->c_capa, capa,
 561                         offsetof(struct lustre_capa, lc_flags)));
 562         ocapa->c_capa = *capa;
 563         set_capa_expiry(ocapa);
 564         spin_unlock(&ocapa->c_lock);
 565
 566         spin_lock(&capa_lock);
 567         if (capa_for_oss(capa))
 568                 inode_add_oss_capa(inode, ocapa);
 569         DEBUG_CAPA(D_SEC, capa, "renew");
 570         EXIT;
 571 retry:
 572         list_del_init(&ocapa->c_list);
 573         sort_add_capa(ocapa, ll_capa_list);
 574         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 575         spin_unlock(&capa_lock);
 576
 577         capa_put(ocapa);
 578         iput(inode);
 579         return rc;
 580 }
 581
 582 void ll_capa_open(struct inode *inode)
 583 {
 584         struct ll_inode_info *lli = ll_i2info(inode);
 585
 586         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 587             == 0)
 588                 return;
 589
 590         if (!S_ISREG(inode->i_mode))
 591                 return;
 592
 593         atomic_inc(&lli->lli_open_count);
 594 }
 595
 596 void ll_capa_close(struct inode *inode)
 597 {
 598         struct ll_inode_info *lli = ll_i2info(inode);
 599
 600         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 601             == 0)
 602                 return;
 603
 604         if (!S_ISREG(inode->i_mode))
 605                 return;
 606
 607         atomic_dec(&lli->lli_open_count);
 608 }
 609
 610 /* delete CAPA_OPC_OSS_TRUNC only */
 611 void ll_truncate_free_capa(struct obd_capa *ocapa)
 612 {
 613         if (!ocapa)
 614                 return;
 615
 616         LASSERT(ocapa->c_capa.lc_opc & CAPA_OPC_OSS_TRUNC);
 617         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free truncate");
 618
 619         capa_put(ocapa);
 620         spin_lock(&capa_lock);
 621         ll_delete_capa(ocapa);
 622         spin_unlock(&capa_lock);
 623 }
 624
 625 void ll_clear_inode_capas(struct inode *inode)
 626 {
 627         struct ll_inode_info *lli = ll_i2info(inode);
 628         struct obd_capa *ocapa, *tmp;
 629
 630         spin_lock(&capa_lock);
 631         ocapa = lli->lli_mds_capa;
 632         if (ocapa)
 633                 ll_delete_capa(ocapa);
 634
 635         list_for_each_entry_safe(ocapa, tmp, &lli->lli_oss_capas,
 636                                  u.cli.lli_list)
 637                 ll_delete_capa(ocapa);
 638         spin_unlock(&capa_lock);
 639 }
 640
 641 void ll_print_capa_stat(struct ll_sb_info *sbi)
 642 {
 643         if (sbi->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 644                 LCONSOLE_INFO("Fid capabilities renewed: %llu\n"
 645                               "Fid capabilities renewal ENOENT: %llu\n"
 646                               "Fid capabilities failed to renew: %llu\n"
 647                               "Fid capabilities renewal retries: %llu\n",
 648                               ll_capa_renewed, ll_capa_renewal_noent,
 649                               ll_capa_renewal_failed, ll_capa_renewal_retries);
 650 }