drivers/staging/lustre/lustre/llite/llite_capa.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  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/uaccess.h>
  45 #include <linux/file.h>
  46 #include <linux/kmod.h>
  47
  48 #include "../include/lustre_lite.h"
  49 #include "llite_internal.h"
  50
  51 /* for obd_capa.c_list, client capa might stay in three places:
  52  * 1. ll_capa_list.
  53  * 2. ll_idle_capas.
  54  * 3. stand alone: just allocated.
  55  */
  56
  57 /* capas for oss writeback and those failed to renew */
  58 static LIST_HEAD(ll_idle_capas);
  59 static struct ptlrpc_thread ll_capa_thread;
  60 static struct list_head *ll_capa_list = &capa_list[CAPA_SITE_CLIENT];
  61
  62 /* llite capa renewal timer */
  63 struct timer_list ll_capa_timer;
  64 /* for debug: indicate whether capa on llite is enabled or not */
  65 static atomic_t ll_capa_debug = ATOMIC_INIT(0);
  66 static unsigned long long ll_capa_renewed;
  67 static unsigned long long ll_capa_renewal_noent;
  68 static unsigned long long ll_capa_renewal_failed;
  69 static unsigned long long ll_capa_renewal_retries;
  70
  71 static int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa);
  72
  73 static inline void update_capa_timer(struct obd_capa *ocapa, unsigned long expiry)
  74 {
  75         if (time_before(expiry, ll_capa_timer.expires) ||
  76             !timer_pending(&ll_capa_timer)) {
  77                 mod_timer(&ll_capa_timer, expiry);
  78                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
  79                            "ll_capa_timer update: %lu/%lu by", expiry, jiffies);
  80         }
  81 }
  82
  83 static inline unsigned long capa_renewal_time(struct obd_capa *ocapa)
  84 {
  85         return cfs_time_sub(ocapa->c_expiry,
  86                             cfs_time_seconds(ocapa->c_capa.lc_timeout) / 2);
  87 }
  88
  89 static inline int capa_is_to_expire(struct obd_capa *ocapa)
  90 {
  91         return time_before_eq(capa_renewal_time(ocapa), cfs_time_current());
  92 }
  93
  94 static inline int have_expired_capa(void)
  95 {
  96         struct obd_capa *ocapa = NULL;
  97         int expired = 0;
  98
  99         /* if ll_capa_list has client capa to expire or ll_idle_capas has
 100          * expired capa, return 1.
 101          */
 102         spin_lock(&capa_lock);
 103         if (!list_empty(ll_capa_list)) {
 104                 ocapa = list_entry(ll_capa_list->next, struct obd_capa,
 105                                        c_list);
 106                 expired = capa_is_to_expire(ocapa);
 107                 if (!expired)
 108                         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 109         } else if (!list_empty(&ll_idle_capas)) {
 110                 ocapa = list_entry(ll_idle_capas.next, struct obd_capa,
 111                                        c_list);
 112                 expired = capa_is_expired(ocapa);
 113                 if (!expired)
 114                         update_capa_timer(ocapa, ocapa->c_expiry);
 115         }
 116         spin_unlock(&capa_lock);
 117
 118         if (expired)
 119                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "expired");
 120         return expired;
 121 }
 122
 123 static void sort_add_capa(struct obd_capa *ocapa, struct list_head *head)
 124 {
 125         struct obd_capa *tmp;
 126         struct list_head *before = NULL;
 127
 128         /* TODO: client capa is sorted by expiry, this could be optimized */
 129         list_for_each_entry_reverse(tmp, head, c_list) {
 130                 if (cfs_time_aftereq(ocapa->c_expiry, tmp->c_expiry)) {
 131                         before = &tmp->c_list;
 132                         break;
 133                 }
 134         }
 135
 136         LASSERT(&ocapa->c_list != before);
 137         list_add(&ocapa->c_list, before ?: head);
 138 }
 139
 140 static inline int obd_capa_open_count(struct obd_capa *oc)
 141 {
 142         struct ll_inode_info *lli = ll_i2info(oc->u.cli.inode);
 143
 144         return atomic_read(&lli->lli_open_count);
 145 }
 146
 147 static void ll_delete_capa(struct obd_capa *ocapa)
 148 {
 149         struct ll_inode_info *lli = ll_i2info(ocapa->u.cli.inode);
 150
 151         if (capa_for_mds(&ocapa->c_capa)) {
 152                 LASSERT(lli->lli_mds_capa == ocapa);
 153                 lli->lli_mds_capa = NULL;
 154         } else if (capa_for_oss(&ocapa->c_capa)) {
 155                 list_del_init(&ocapa->u.cli.lli_list);
 156         }
 157
 158         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free client");
 159         list_del_init(&ocapa->c_list);
 160         capa_count[CAPA_SITE_CLIENT]--;
 161         /* release the ref when alloc */
 162         capa_put(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_setattr_ost().
 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
 177         thread_set_flags(&ll_capa_thread, SVC_RUNNING);
 178         wake_up(&ll_capa_thread.t_ctl_waitq);
 179
 180         while (1) {
 181                 l_wait_event(ll_capa_thread.t_ctl_waitq,
 182                              !thread_is_running(&ll_capa_thread) ||
 183                              have_expired_capa(),
 184                              &lwi);
 185
 186                 if (!thread_is_running(&ll_capa_thread))
 187                         break;
 188
 189                 next = NULL;
 190
 191                 spin_lock(&capa_lock);
 192                 list_for_each_entry_safe(ocapa, tmp, ll_capa_list, c_list) {
 193                         __u64 ibits;
 194
 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                         /* ibits may be changed by ll_have_md_lock() so we have
 209                          * to set it each time */
 210                         ibits = MDS_INODELOCK_LOOKUP;
 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                                              &ibits, LCK_MINMODE)) {
 216                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 217                                            "skip renewal for");
 218                                 sort_add_capa(ocapa, &ll_idle_capas);
 219                                 continue;
 220                         }
 221
 222                         /* for OSS capability, only renew those whose inode is
 223                          * opened.
 224                          */
 225                         if (capa_for_oss(&ocapa->c_capa) &&
 226                             obd_capa_open_count(ocapa) == 0) {
 227                                 /* oss capa with open count == 0 won't renew,
 228                                  * move to idle list */
 229                                 sort_add_capa(ocapa, &ll_idle_capas);
 230                                 continue;
 231                         }
 232
 233                         /* NB iput() is in ll_update_capa() */
 234                         inode = igrab(ocapa->u.cli.inode);
 235                         if (inode == NULL) {
 236                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 237                                            "igrab failed for");
 238                                 continue;
 239                         }
 240
 241                         capa_get(ocapa);
 242                         ll_capa_renewed++;
 243                         spin_unlock(&capa_lock);
 244                         rc = md_renew_capa(ll_i2mdexp(inode), ocapa,
 245                                            ll_update_capa);
 246                         spin_lock(&capa_lock);
 247                         if (rc) {
 248                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 249                                            "renew failed: %d", rc);
 250                                 ll_capa_renewal_failed++;
 251                         }
 252                 }
 253
 254                 if (next)
 255                         update_capa_timer(next, capa_renewal_time(next));
 256
 257                 list_for_each_entry_safe(ocapa, tmp, &ll_idle_capas,
 258                                              c_list) {
 259                         if (!capa_is_expired(ocapa)) {
 260                                 if (!next)
 261                                         update_capa_timer(ocapa,
 262                                                           ocapa->c_expiry);
 263                                 break;
 264                         }
 265
 266                         if (atomic_read(&ocapa->c_refc) > 1) {
 267                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 268                                            "expired(c_refc %d), don't release",
 269                                            atomic_read(&ocapa->c_refc));
 270                                 /* don't try to renew any more */
 271                                 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                 spin_unlock(&capa_lock);
 281         }
 282
 283         thread_set_flags(&ll_capa_thread, SVC_STOPPED);
 284         wake_up(&ll_capa_thread.t_ctl_waitq);
 285         return 0;
 286 }
 287
 288 void ll_capa_timer_callback(unsigned long unused)
 289 {
 290         wake_up(&ll_capa_thread.t_ctl_waitq);
 291 }
 292
 293 int ll_capa_thread_start(void)
 294 {
 295         struct task_struct *task;
 296
 297         init_waitqueue_head(&ll_capa_thread.t_ctl_waitq);
 298
 299         task = kthread_run(capa_thread_main, NULL, "ll_capa");
 300         if (IS_ERR(task)) {
 301                 CERROR("cannot start expired capa thread: rc %ld\n",
 302                         PTR_ERR(task));
 303                 return PTR_ERR(task);
 304         }
 305         wait_event(ll_capa_thread.t_ctl_waitq,
 306                        thread_is_running(&ll_capa_thread));
 307
 308         return 0;
 309 }
 310
 311 void ll_capa_thread_stop(void)
 312 {
 313         thread_set_flags(&ll_capa_thread, SVC_STOPPING);
 314         wake_up(&ll_capa_thread.t_ctl_waitq);
 315         wait_event(ll_capa_thread.t_ctl_waitq,
 316                        thread_is_stopped(&ll_capa_thread));
 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         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_OSS_CAPA) == 0)
 326                 return NULL;
 327
 328         LASSERT(opc == CAPA_OPC_OSS_WRITE || opc == CAPA_OPC_OSS_RW ||
 329                 opc == CAPA_OPC_OSS_TRUNC);
 330
 331         spin_lock(&capa_lock);
 332         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 333                 if (capa_is_expired(ocapa))
 334                         continue;
 335                 if ((opc & CAPA_OPC_OSS_WRITE) &&
 336                     capa_opc_supported(&ocapa->c_capa, CAPA_OPC_OSS_WRITE)) {
 337                         found = 1;
 338                         break;
 339                 } else if ((opc & CAPA_OPC_OSS_READ) &&
 340                            capa_opc_supported(&ocapa->c_capa,
 341                                               CAPA_OPC_OSS_READ)) {
 342                         found = 1;
 343                         break;
 344                 } else if ((opc & CAPA_OPC_OSS_TRUNC) &&
 345                            capa_opc_supported(&ocapa->c_capa, opc)) {
 346                         found = 1;
 347                         break;
 348                 }
 349         }
 350
 351         if (found) {
 352                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 353                                   ll_inode2fid(inode)));
 354                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 355
 356                 capa_get(ocapa);
 357
 358                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 359         } else {
 360                 ocapa = NULL;
 361
 362                 if (atomic_read(&ll_capa_debug)) {
 363                         CERROR("no capability for "DFID" opc %#llx\n",
 364                                PFID(&lli->lli_fid), opc);
 365                         atomic_set(&ll_capa_debug, 0);
 366                 }
 367         }
 368         spin_unlock(&capa_lock);
 369
 370         return ocapa;
 371 }
 372 EXPORT_SYMBOL(ll_osscapa_get);
 373
 374 struct obd_capa *ll_mdscapa_get(struct inode *inode)
 375 {
 376         struct ll_inode_info *lli = ll_i2info(inode);
 377         struct obd_capa *ocapa;
 378
 379         LASSERT(inode != NULL);
 380
 381         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_MDS_CAPA) == 0)
 382                 return NULL;
 383
 384         spin_lock(&capa_lock);
 385         ocapa = capa_get(lli->lli_mds_capa);
 386         spin_unlock(&capa_lock);
 387         if (!ocapa && atomic_read(&ll_capa_debug)) {
 388                 CERROR("no mds capability for "DFID"\n", PFID(&lli->lli_fid));
 389                 atomic_set(&ll_capa_debug, 0);
 390         }
 391
 392         return ocapa;
 393 }
 394
 395 static struct obd_capa *do_add_mds_capa(struct inode *inode,
 396                                         struct obd_capa *ocapa)
 397 {
 398         struct ll_inode_info *lli = ll_i2info(inode);
 399         struct obd_capa *old = lli->lli_mds_capa;
 400         struct lustre_capa *capa = &ocapa->c_capa;
 401
 402         if (!old) {
 403                 ocapa->u.cli.inode = inode;
 404                 lli->lli_mds_capa = ocapa;
 405                 capa_count[CAPA_SITE_CLIENT]++;
 406
 407                 DEBUG_CAPA(D_SEC, capa, "add MDS");
 408         } else {
 409                 spin_lock(&old->c_lock);
 410                 old->c_capa = *capa;
 411                 spin_unlock(&old->c_lock);
 412
 413                 DEBUG_CAPA(D_SEC, capa, "update MDS");
 414
 415                 capa_put(ocapa);
 416                 ocapa = old;
 417         }
 418         return ocapa;
 419 }
 420
 421 static struct obd_capa *do_lookup_oss_capa(struct inode *inode, int opc)
 422 {
 423         struct ll_inode_info *lli = ll_i2info(inode);
 424         struct obd_capa *ocapa;
 425
 426         /* inside capa_lock */
 427         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 428                 if ((capa_opc(&ocapa->c_capa) & opc) != opc)
 429                         continue;
 430
 431                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 432                                   ll_inode2fid(inode)));
 433                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 434
 435                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 436                 return ocapa;
 437         }
 438
 439         return NULL;
 440 }
 441
 442 static inline void inode_add_oss_capa(struct inode *inode,
 443                                       struct obd_capa *ocapa)
 444 {
 445         struct ll_inode_info *lli = ll_i2info(inode);
 446         struct obd_capa *tmp;
 447         struct list_head *next = NULL;
 448
 449         /* capa is sorted in lli_oss_capas so lookup can always find the
 450          * latest one */
 451         list_for_each_entry(tmp, &lli->lli_oss_capas, u.cli.lli_list) {
 452                 if (cfs_time_after(ocapa->c_expiry, tmp->c_expiry)) {
 453                         next = &tmp->u.cli.lli_list;
 454                         break;
 455                 }
 456         }
 457         LASSERT(&ocapa->u.cli.lli_list != next);
 458         list_move_tail(&ocapa->u.cli.lli_list, next ?: &lli->lli_oss_capas);
 459 }
 460
 461 static struct obd_capa *do_add_oss_capa(struct inode *inode,
 462                                         struct obd_capa *ocapa)
 463 {
 464         struct obd_capa *old;
 465         struct lustre_capa *capa = &ocapa->c_capa;
 466
 467         LASSERTF(S_ISREG(inode->i_mode),
 468                  "inode has oss capa, but not regular file, mode: %d\n",
 469                  inode->i_mode);
 470
 471         /* FIXME: can't replace it so easily with fine-grained opc */
 472         old = do_lookup_oss_capa(inode, capa_opc(capa) & CAPA_OPC_OSS_ONLY);
 473         if (!old) {
 474                 ocapa->u.cli.inode = inode;
 475                 INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
 476                 capa_count[CAPA_SITE_CLIENT]++;
 477
 478                 DEBUG_CAPA(D_SEC, capa, "add OSS");
 479         } else {
 480                 spin_lock(&old->c_lock);
 481                 old->c_capa = *capa;
 482                 spin_unlock(&old->c_lock);
 483
 484                 DEBUG_CAPA(D_SEC, capa, "update OSS");
 485
 486                 capa_put(ocapa);
 487                 ocapa = old;
 488         }
 489
 490         inode_add_oss_capa(inode, ocapa);
 491         return ocapa;
 492 }
 493
 494 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa)
 495 {
 496         spin_lock(&capa_lock);
 497         ocapa = capa_for_mds(&ocapa->c_capa) ? do_add_mds_capa(inode, ocapa) :
 498                                                do_add_oss_capa(inode, ocapa);
 499
 500         /* truncate capa won't renew */
 501         if (ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC) {
 502                 set_capa_expiry(ocapa);
 503                 list_del_init(&ocapa->c_list);
 504                 sort_add_capa(ocapa, ll_capa_list);
 505
 506                 update_capa_timer(ocapa, capa_renewal_time(ocapa));
 507         }
 508
 509         spin_unlock(&capa_lock);
 510
 511         atomic_set(&ll_capa_debug, 1);
 512         return ocapa;
 513 }
 514
 515 static inline void delay_capa_renew(struct obd_capa *oc, unsigned long delay)
 516 {
 517         /* NB: set a fake expiry for this capa to prevent it renew too soon */
 518         oc->c_expiry = cfs_time_add(oc->c_expiry, cfs_time_seconds(delay));
 519 }
 520
 521 static int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa)
 522 {
 523         struct inode *inode = ocapa->u.cli.inode;
 524         int rc = 0;
 525
 526         LASSERT(ocapa);
 527
 528         if (IS_ERR(capa)) {
 529                 /* set error code */
 530                 rc = PTR_ERR(capa);
 531                 spin_lock(&capa_lock);
 532                 if (rc == -ENOENT) {
 533                         DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 534                                    "renewal canceled because object removed");
 535                         ll_capa_renewal_noent++;
 536                 } else {
 537                         ll_capa_renewal_failed++;
 538
 539                         /* failed capa won't be renewed any longer, but if -EIO,
 540                          * client might be doing recovery, retry in 2 min. */
 541                         if (rc == -EIO && !capa_is_expired(ocapa)) {
 542                                 delay_capa_renew(ocapa, 120);
 543                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 544                                            "renewal failed: -EIO, retry in 2 mins");
 545                                 ll_capa_renewal_retries++;
 546                                 goto retry;
 547                         } else {
 548                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 549                                            "renewal failed(rc: %d) for", rc);
 550                         }
 551                 }
 552
 553                 list_del_init(&ocapa->c_list);
 554                 sort_add_capa(ocapa, &ll_idle_capas);
 555                 spin_unlock(&capa_lock);
 556
 557                 capa_put(ocapa);
 558                 iput(inode);
 559                 return rc;
 560         }
 561
 562         spin_lock(&ocapa->c_lock);
 563         LASSERT(!memcmp(&ocapa->c_capa, capa,
 564                         offsetof(struct lustre_capa, lc_opc)));
 565         ocapa->c_capa = *capa;
 566         set_capa_expiry(ocapa);
 567         spin_unlock(&ocapa->c_lock);
 568
 569         spin_lock(&capa_lock);
 570         if (capa_for_oss(capa))
 571                 inode_add_oss_capa(inode, ocapa);
 572         DEBUG_CAPA(D_SEC, capa, "renew");
 573 retry:
 574         list_del_init(&ocapa->c_list);
 575         sort_add_capa(ocapa, ll_capa_list);
 576         update_capa_timer(ocapa, capa_renewal_time(ocapa));
 577         spin_unlock(&capa_lock);
 578
 579         capa_put(ocapa);
 580         iput(inode);
 581         return rc;
 582 }
 583
 584 void ll_capa_open(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_inc(&lli->lli_open_count);
 596 }
 597
 598 void ll_capa_close(struct inode *inode)
 599 {
 600         struct ll_inode_info *lli = ll_i2info(inode);
 601
 602         if ((ll_i2sbi(inode)->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 603             == 0)
 604                 return;
 605
 606         if (!S_ISREG(inode->i_mode))
 607                 return;
 608
 609         atomic_dec(&lli->lli_open_count);
 610 }
 611
 612 /* delete CAPA_OPC_OSS_TRUNC only */
 613 void ll_truncate_free_capa(struct obd_capa *ocapa)
 614 {
 615         if (!ocapa)
 616                 return;
 617
 618         LASSERT(ocapa->c_capa.lc_opc & CAPA_OPC_OSS_TRUNC);
 619         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free truncate");
 620
 621         /* release ref when find */
 622         capa_put(ocapa);
 623         if (likely(ocapa->c_capa.lc_opc == CAPA_OPC_OSS_TRUNC)) {
 624                 spin_lock(&capa_lock);
 625                 ll_delete_capa(ocapa);
 626                 spin_unlock(&capa_lock);
 627         }
 628 }
 629
 630 void ll_clear_inode_capas(struct inode *inode)
 631 {
 632         struct ll_inode_info *lli = ll_i2info(inode);
 633         struct obd_capa *ocapa, *tmp;
 634
 635         spin_lock(&capa_lock);
 636         ocapa = lli->lli_mds_capa;
 637         if (ocapa)
 638                 ll_delete_capa(ocapa);
 639
 640         list_for_each_entry_safe(ocapa, tmp, &lli->lli_oss_capas,
 641                                      u.cli.lli_list)
 642                 ll_delete_capa(ocapa);
 643         spin_unlock(&capa_lock);
 644 }
 645
 646 void ll_print_capa_stat(struct ll_sb_info *sbi)
 647 {
 648         if (sbi->ll_flags & (LL_SBI_MDS_CAPA | LL_SBI_OSS_CAPA))
 649                 LCONSOLE_INFO("Fid capabilities renewed: %llu\n"
 650                               "Fid capabilities renewal ENOENT: %llu\n"
 651                               "Fid capabilities failed to renew: %llu\n"
 652                               "Fid capabilities renewal retries: %llu\n",
 653                               ll_capa_renewed, ll_capa_renewal_noent,
 654                               ll_capa_renewal_failed, ll_capa_renewal_retries);
 655 }