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         return atomic_read(&lli->lli_open_count);
 144 }
 145
 146 static void ll_delete_capa(struct obd_capa *ocapa)
 147 {
 148         struct ll_inode_info *lli = ll_i2info(ocapa->u.cli.inode);
 149
 150         if (capa_for_mds(&ocapa->c_capa)) {
 151                 LASSERT(lli->lli_mds_capa == ocapa);
 152                 lli->lli_mds_capa = NULL;
 153         } else if (capa_for_oss(&ocapa->c_capa)) {
 154                 list_del_init(&ocapa->u.cli.lli_list);
 155         }
 156
 157         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "free client");
 158         list_del_init(&ocapa->c_list);
 159         capa_count[CAPA_SITE_CLIENT]--;
 160         /* release the ref when alloc */
 161         capa_put(ocapa);
 162 }
 163
 164 /* three places where client capa is deleted:
 165  * 1. capa_thread_main(), main place to delete expired capa.
 166  * 2. ll_clear_inode_capas() in ll_clear_inode().
 167  * 3. ll_truncate_free_capa() delete truncate capa explicitly in ll_setattr_ost().
 168  */
 169 static int capa_thread_main(void *unused)
 170 {
 171         struct obd_capa *ocapa, *tmp, *next;
 172         struct inode *inode = NULL;
 173         struct l_wait_info lwi = { 0 };
 174         int rc;
 175
 176         thread_set_flags(&ll_capa_thread, SVC_RUNNING);
 177         wake_up(&ll_capa_thread.t_ctl_waitq);
 178
 179         while (1) {
 180                 l_wait_event(ll_capa_thread.t_ctl_waitq,
 181                              !thread_is_running(&ll_capa_thread) ||
 182                              have_expired_capa(),
 183                              &lwi);
 184
 185                 if (!thread_is_running(&ll_capa_thread))
 186                         break;
 187
 188                 next = NULL;
 189
 190                 spin_lock(&capa_lock);
 191                 list_for_each_entry_safe(ocapa, tmp, ll_capa_list, c_list) {
 192                         __u64 ibits;
 193
 194                         LASSERT(ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC);
 195
 196                         if (!capa_is_to_expire(ocapa)) {
 197                                 next = ocapa;
 198                                 break;
 199                         }
 200
 201                         list_del_init(&ocapa->c_list);
 202
 203                         /* for MDS capability, only renew those which belong to
 204                          * dir, or its inode is opened, or client holds LOOKUP
 205                          * lock.
 206                          */
 207                         /* ibits may be changed by ll_have_md_lock() so we have
 208                          * to set it each time */
 209                         ibits = MDS_INODELOCK_LOOKUP;
 210                         if (capa_for_mds(&ocapa->c_capa) &&
 211                             !S_ISDIR(ocapa->u.cli.inode->i_mode) &&
 212                             obd_capa_open_count(ocapa) == 0 &&
 213                             !ll_have_md_lock(ocapa->u.cli.inode,
 214                                              &ibits, LCK_MINMODE)) {
 215                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 216                                            "skip renewal for");
 217                                 sort_add_capa(ocapa, &ll_idle_capas);
 218                                 continue;
 219                         }
 220
 221                         /* for OSS capability, only renew those whose inode is
 222                          * opened.
 223                          */
 224                         if (capa_for_oss(&ocapa->c_capa) &&
 225                             obd_capa_open_count(ocapa) == 0) {
 226                                 /* oss capa with open count == 0 won't renew,
 227                                  * move to idle list */
 228                                 sort_add_capa(ocapa, &ll_idle_capas);
 229                                 continue;
 230                         }
 231
 232                         /* NB iput() is in ll_update_capa() */
 233                         inode = igrab(ocapa->u.cli.inode);
 234                         if (inode == NULL) {
 235                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 236                                            "igrab failed for");
 237                                 continue;
 238                         }
 239
 240                         capa_get(ocapa);
 241                         ll_capa_renewed++;
 242                         spin_unlock(&capa_lock);
 243                         rc = md_renew_capa(ll_i2mdexp(inode), ocapa,
 244                                            ll_update_capa);
 245                         spin_lock(&capa_lock);
 246                         if (rc) {
 247                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 248                                            "renew failed: %d", rc);
 249                                 ll_capa_renewal_failed++;
 250                         }
 251                 }
 252
 253                 if (next)
 254                         update_capa_timer(next, capa_renewal_time(next));
 255
 256                 list_for_each_entry_safe(ocapa, tmp, &ll_idle_capas,
 257                                              c_list) {
 258                         if (!capa_is_expired(ocapa)) {
 259                                 if (!next)
 260                                         update_capa_timer(ocapa,
 261                                                           ocapa->c_expiry);
 262                                 break;
 263                         }
 264
 265                         if (atomic_read(&ocapa->c_refc) > 1) {
 266                                 DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 267                                            "expired(c_refc %d), don't release",
 268                                            atomic_read(&ocapa->c_refc));
 269                                 /* don't try to renew any more */
 270                                 list_del_init(&ocapa->c_list);
 271                                 continue;
 272                         }
 273
 274                         /* expired capa is released. */
 275                         DEBUG_CAPA(D_SEC, &ocapa->c_capa, "release expired");
 276                         ll_delete_capa(ocapa);
 277                 }
 278
 279                 spin_unlock(&capa_lock);
 280         }
 281
 282         thread_set_flags(&ll_capa_thread, SVC_STOPPED);
 283         wake_up(&ll_capa_thread.t_ctl_waitq);
 284         return 0;
 285 }
 286
 287 void ll_capa_timer_callback(unsigned long unused)
 288 {
 289         wake_up(&ll_capa_thread.t_ctl_waitq);
 290 }
 291
 292 int ll_capa_thread_start(void)
 293 {
 294         struct task_struct *task;
 295
 296         init_waitqueue_head(&ll_capa_thread.t_ctl_waitq);
 297
 298         task = kthread_run(capa_thread_main, NULL, "ll_capa");
 299         if (IS_ERR(task)) {
 300                 CERROR("cannot start expired capa thread: rc %ld\n",
 301                         PTR_ERR(task));
 302                 return PTR_ERR(task);
 303         }
 304         wait_event(ll_capa_thread.t_ctl_waitq,
 305                        thread_is_running(&ll_capa_thread));
 306
 307         return 0;
 308 }
 309
 310 void ll_capa_thread_stop(void)
 311 {
 312         thread_set_flags(&ll_capa_thread, SVC_STOPPING);
 313         wake_up(&ll_capa_thread.t_ctl_waitq);
 314         wait_event(ll_capa_thread.t_ctl_waitq,
 315                        thread_is_stopped(&ll_capa_thread));
 316 }
 317
 318 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc)
 319 {
 320         struct ll_inode_info *lli = ll_i2info(inode);
 321         struct obd_capa *ocapa;
 322         int found = 0;
 323
 324         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_OSS_CAPA) == 0)
 325                 return NULL;
 326
 327         LASSERT(opc == CAPA_OPC_OSS_WRITE || opc == CAPA_OPC_OSS_RW ||
 328                 opc == CAPA_OPC_OSS_TRUNC);
 329
 330         spin_lock(&capa_lock);
 331         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 332                 if (capa_is_expired(ocapa))
 333                         continue;
 334                 if ((opc & CAPA_OPC_OSS_WRITE) &&
 335                     capa_opc_supported(&ocapa->c_capa, CAPA_OPC_OSS_WRITE)) {
 336                         found = 1;
 337                         break;
 338                 } else if ((opc & CAPA_OPC_OSS_READ) &&
 339                            capa_opc_supported(&ocapa->c_capa,
 340                                               CAPA_OPC_OSS_READ)) {
 341                         found = 1;
 342                         break;
 343                 } else if ((opc & CAPA_OPC_OSS_TRUNC) &&
 344                            capa_opc_supported(&ocapa->c_capa, opc)) {
 345                         found = 1;
 346                         break;
 347                 }
 348         }
 349
 350         if (found) {
 351                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 352                                   ll_inode2fid(inode)));
 353                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 354
 355                 capa_get(ocapa);
 356
 357                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 358         } else {
 359                 ocapa = NULL;
 360
 361                 if (atomic_read(&ll_capa_debug)) {
 362                         CERROR("no capability for "DFID" opc %#llx\n",
 363                                PFID(&lli->lli_fid), opc);
 364                         atomic_set(&ll_capa_debug, 0);
 365                 }
 366         }
 367         spin_unlock(&capa_lock);
 368
 369         return ocapa;
 370 }
 371 EXPORT_SYMBOL(ll_osscapa_get);
 372
 373 struct obd_capa *ll_mdscapa_get(struct inode *inode)
 374 {
 375         struct ll_inode_info *lli = ll_i2info(inode);
 376         struct obd_capa *ocapa;
 377
 378         LASSERT(inode != NULL);
 379
 380         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_MDS_CAPA) == 0)
 381                 return NULL;
 382
 383         spin_lock(&capa_lock);
 384         ocapa = capa_get(lli->lli_mds_capa);
 385         spin_unlock(&capa_lock);
 386         if (!ocapa && atomic_read(&ll_capa_debug)) {
 387                 CERROR("no mds capability for "DFID"\n", PFID(&lli->lli_fid));
 388                 atomic_set(&ll_capa_debug, 0);
 389         }
 390
 391         return ocapa;
 392 }
 393
 394 static struct obd_capa *do_add_mds_capa(struct inode *inode,
 395                                         struct obd_capa *ocapa)
 396 {
 397         struct ll_inode_info *lli = ll_i2info(inode);
 398         struct obd_capa *old = lli->lli_mds_capa;
 399         struct lustre_capa *capa = &ocapa->c_capa;
 400
 401         if (!old) {
 402                 ocapa->u.cli.inode = inode;
 403                 lli->lli_mds_capa = ocapa;
 404                 capa_count[CAPA_SITE_CLIENT]++;
 405
 406                 DEBUG_CAPA(D_SEC, capa, "add MDS");
 407         } else {
 408                 spin_lock(&old->c_lock);
 409                 old->c_capa = *capa;
 410                 spin_unlock(&old->c_lock);
 411
 412                 DEBUG_CAPA(D_SEC, capa, "update MDS");
 413
 414                 capa_put(ocapa);
 415                 ocapa = old;
 416         }
 417         return ocapa;
 418 }
 419
 420 static struct obd_capa *do_lookup_oss_capa(struct inode *inode, int opc)
 421 {
 422         struct ll_inode_info *lli = ll_i2info(inode);
 423         struct obd_capa *ocapa;
 424
 425         /* inside capa_lock */
 426         list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
 427                 if ((capa_opc(&ocapa->c_capa) & opc) != opc)
 428                         continue;
 429
 430                 LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
 431                                   ll_inode2fid(inode)));
 432                 LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
 433
 434                 DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
 435                 return ocapa;
 436         }
 437
 438         return NULL;
 439 }
 440
 441 static inline void inode_add_oss_capa(struct inode *inode,
 442                                       struct obd_capa *ocapa)
 443 {
 444         struct ll_inode_info *lli = ll_i2info(inode);
 445         struct obd_capa *tmp;
 446         struct list_head *next = NULL;
 447
 448         /* capa is sorted in lli_oss_capas so lookup can always find the
 449          * latest one */
 450         list_for_each_entry(tmp, &lli->lli_oss_capas, u.cli.lli_list) {
 451                 if (cfs_time_after(ocapa->c_expiry, tmp->c_expiry)) {
 452                         next = &tmp->u.cli.lli_list;
 453                         break;
 454                 }
 455         }
 456         LASSERT(&ocapa->u.cli.lli_list != next);
 457         list_move_tail(&ocapa->u.cli.lli_list, next ?: &lli->lli_oss_capas);
 458 }
 459
 460 static struct obd_capa *do_add_oss_capa(struct inode *inode,
 461                                         struct obd_capa *ocapa)
 462 {
 463         struct obd_capa *old;
 464         struct lustre_capa *capa = &ocapa->c_capa;
 465
 466         LASSERTF(S_ISREG(inode->i_mode),
 467                  "inode has oss capa, but not regular file, mode: %d\n",
 468                  inode->i_mode);
 469
 470         /* FIXME: can't replace it so easily with fine-grained opc */
 471         old = do_lookup_oss_capa(inode, capa_opc(capa) & CAPA_OPC_OSS_ONLY);
 472         if (!old) {
 473                 ocapa->u.cli.inode = inode;
 474                 INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
 475                 capa_count[CAPA_SITE_CLIENT]++;
 476
 477                 DEBUG_CAPA(D_SEC, capa, "add OSS");
 478         } else {
 479                 spin_lock(&old->c_lock);
 480                 old->c_capa = *capa;
 481                 spin_unlock(&old->c_lock);
 482
 483                 DEBUG_CAPA(D_SEC, capa, "update OSS");
 484
 485                 capa_put(ocapa);
 486                 ocapa = old;
 487         }
 488
 489         inode_add_oss_capa(inode, ocapa);
 490         return ocapa;
 491 }
 492
 493 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa)
 494 {
 495         spin_lock(&capa_lock);
 496         ocapa = capa_for_mds(&ocapa->c_capa) ? do_add_mds_capa(inode, ocapa) :
 497                                                do_add_oss_capa(inode, ocapa);
 498
 499         /* truncate capa won't renew */
 500         if (ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC) {
 501                 set_capa_expiry(ocapa);
 502                 list_del_init(&ocapa->c_list);
 503                 sort_add_capa(ocapa, ll_capa_list);
 504
 505                 update_capa_timer(ocapa, capa_renewal_time(ocapa));
 506         }
 507
 508         spin_unlock(&capa_lock);
 509
 510         atomic_set(&ll_capa_debug, 1);
 511         return ocapa;
 512 }
 513
 514 static inline void delay_capa_renew(struct obd_capa *oc, unsigned long delay)
 515 {
 516         /* NB: set a fake expiry for this capa to prevent it renew too soon */
 517         oc->c_expiry = cfs_time_add(oc->c_expiry, cfs_time_seconds(delay));
 518 }
 519
 520 static int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa)
 521 {
 522         struct inode *inode = ocapa->u.cli.inode;
 523         int rc = 0;
 524
 525         LASSERT(ocapa);
 526
 527         if (IS_ERR(capa)) {
 528                 /* set error code */
 529                 rc = PTR_ERR(capa);
 530                 spin_lock(&capa_lock);
 531                 if (rc == -ENOENT) {
 532                         DEBUG_CAPA(D_SEC, &ocapa->c_capa,
 533                                    "renewal canceled because object removed");
 534                         ll_capa_renewal_noent++;
 535                 } else {
 536                         ll_capa_renewal_failed++;
 537
 538                         /* failed capa won't be renewed any longer, but if -EIO,
 539                          * client might be doing recovery, retry in 2 min. */
 540                         if (rc == -EIO && !capa_is_expired(ocapa)) {
 541                                 delay_capa_renew(ocapa, 120);
 542                                 DEBUG_CAPA(D_ERROR, &ocapa->c_capa,
 543                                            "renewal failed: -EIO, "
 544                                            "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 }