Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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> |
Anil Belur | 576eb39 | 2014-06-25 14:57:28 +1000 | [diff] [blame] | 44 | #include <linux/uaccess.h> |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 45 | #include <linux/file.h> |
| 46 | #include <linux/kmod.h> |
| 47 | |
Greg Kroah-Hartman | 67a235f | 2014-07-11 21:51:41 -0700 | [diff] [blame] | 48 | #include "../include/lustre_lite.h" |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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); |
Anil Belur | 8bcf3c2 | 2014-06-25 14:57:27 +1000 | [diff] [blame] | 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; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 70 | |
John L. Hammond | 2d95f10 | 2014-04-27 13:07:05 -0400 | [diff] [blame] | 71 | static int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa); |
| 72 | |
Greg Kroah-Hartman | a649ad1 | 2014-07-12 00:27:46 -0700 | [diff] [blame] | 73 | static inline void update_capa_timer(struct obd_capa *ocapa, unsigned long expiry) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 74 | { |
Greg Kroah-Hartman | 699503b | 2014-07-12 01:03:41 -0700 | [diff] [blame] | 75 | if (time_before(expiry, ll_capa_timer.expires) || |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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 | |
Greg Kroah-Hartman | a649ad1 | 2014-07-12 00:27:46 -0700 | [diff] [blame] | 83 | static inline unsigned long capa_renewal_time(struct obd_capa *ocapa) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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 | { |
Greg Kroah-Hartman | 82173c6 | 2014-07-12 00:31:18 -0700 | [diff] [blame] | 91 | return time_before_eq(capa_renewal_time(ocapa), cfs_time_current()); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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); |
Aparna Karuthodi | 06d0c49 | 2015-06-03 15:03:57 +0530 | [diff] [blame] | 143 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 285 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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 | { |
Greg Kroah-Hartman | 68b636b | 2013-08-04 08:56:42 +0800 | [diff] [blame] | 295 | struct task_struct *task; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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)); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 303 | return PTR_ERR(task); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 304 | } |
| 305 | wait_event(ll_capa_thread.t_ctl_waitq, |
| 306 | thread_is_running(&ll_capa_thread)); |
| 307 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 308 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 325 | if ((ll_i2sbi(inode)->ll_flags & LL_SBI_OSS_CAPA) == 0) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 326 | return NULL; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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)) { |
Greg Kroah-Hartman | 55f5a82 | 2014-07-12 20:26:07 -0700 | [diff] [blame] | 363 | CERROR("no capability for "DFID" opc %#llx\n", |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 364 | PFID(&lli->lli_fid), opc); |
| 365 | atomic_set(&ll_capa_debug, 0); |
| 366 | } |
| 367 | } |
| 368 | spin_unlock(&capa_lock); |
| 369 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 370 | return ocapa; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 378 | |
| 379 | LASSERT(inode != NULL); |
| 380 | |
| 381 | if ((ll_i2sbi(inode)->ll_flags & LL_SBI_MDS_CAPA) == 0) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 382 | return NULL; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 392 | return ocapa; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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 | |
Greg Kroah-Hartman | a649ad1 | 2014-07-12 00:27:46 -0700 | [diff] [blame] | 515 | static inline void delay_capa_renew(struct obd_capa *oc, unsigned long delay) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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 | |
John L. Hammond | 2d95f10 | 2014-04-27 13:07:05 -0400 | [diff] [blame] | 521 | static int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 522 | { |
| 523 | struct inode *inode = ocapa->u.cli.inode; |
| 524 | int rc = 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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, |
Joe Perches | 2d00bd1 | 2014-11-23 11:28:50 -0800 | [diff] [blame] | 544 | "renewal failed: -EIO, retry in 2 mins"); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 545 | ll_capa_renewal_retries++; |
Julia Lawall | 34e1f2b | 2014-08-30 16:24:55 +0200 | [diff] [blame] | 546 | goto retry; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 559 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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"); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 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 | } |