net/ceph/osd_client.c

   1
   2 #include <linux/ceph/ceph_debug.h>
   3
   4 #include <linux/module.h>
   5 #include <linux/err.h>
   6 #include <linux/highmem.h>
   7 #include <linux/mm.h>
   8 #include <linux/pagemap.h>
   9 #include <linux/slab.h>
  10 #include <linux/uaccess.h>
  11 #ifdef CONFIG_BLOCK
  12 #include <linux/bio.h>
  13 #endif
  14
  15 #include <linux/ceph/libceph.h>
  16 #include <linux/ceph/osd_client.h>
  17 #include <linux/ceph/messenger.h>
  18 #include <linux/ceph/decode.h>
  19 #include <linux/ceph/auth.h>
  20 #include <linux/ceph/pagelist.h>
  21
  22 #define OSD_OPREPLY_FRONT_LEN   512
  23
  24 static struct kmem_cache        *ceph_osd_request_cache;
  25
  26 static const struct ceph_connection_operations osd_con_ops;
  27
  28 /*
  29  * Implement client access to distributed object storage cluster.
  30  *
  31  * All data objects are stored within a cluster/cloud of OSDs, or
  32  * "object storage devices."  (Note that Ceph OSDs have _nothing_ to
  33  * do with the T10 OSD extensions to SCSI.)  Ceph OSDs are simply
  34  * remote daemons serving up and coordinating consistent and safe
  35  * access to storage.
  36  *
  37  * Cluster membership and the mapping of data objects onto storage devices
  38  * are described by the osd map.
  39  *
  40  * We keep track of pending OSD requests (read, write), resubmit
  41  * requests to different OSDs when the cluster topology/data layout
  42  * change, or retry the affected requests when the communications
  43  * channel with an OSD is reset.
  44  */
  45
  46 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
  47 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
  48 static void link_linger(struct ceph_osd *osd,
  49                         struct ceph_osd_linger_request *lreq);
  50 static void unlink_linger(struct ceph_osd *osd,
  51                           struct ceph_osd_linger_request *lreq);
  52
  53 #if 1
  54 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
  55 {
  56         bool wrlocked = true;
  57
  58         if (unlikely(down_read_trylock(sem))) {
  59                 wrlocked = false;
  60                 up_read(sem);
  61         }
  62
  63         return wrlocked;
  64 }
  65 static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
  66 {
  67         WARN_ON(!rwsem_is_locked(&osdc->lock));
  68 }
  69 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
  70 {
  71         WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
  72 }
  73 static inline void verify_osd_locked(struct ceph_osd *osd)
  74 {
  75         struct ceph_osd_client *osdc = osd->o_osdc;
  76
  77         WARN_ON(!(mutex_is_locked(&osd->lock) &&
  78                   rwsem_is_locked(&osdc->lock)) &&
  79                 !rwsem_is_wrlocked(&osdc->lock));
  80 }
  81 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
  82 {
  83         WARN_ON(!mutex_is_locked(&lreq->lock));
  84 }
  85 #else
  86 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
  87 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
  88 static inline void verify_osd_locked(struct ceph_osd *osd) { }
  89 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
  90 #endif
  91
  92 /*
  93  * calculate the mapping of a file extent onto an object, and fill out the
  94  * request accordingly.  shorten extent as necessary if it crosses an
  95  * object boundary.
  96  *
  97  * fill osd op in request message.
  98  */
  99 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
 100                         u64 *objnum, u64 *objoff, u64 *objlen)
 101 {
 102         u64 orig_len = *plen;
 103         int r;
 104
 105         /* object extent? */
 106         r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
 107                                           objoff, objlen);
 108         if (r < 0)
 109                 return r;
 110         if (*objlen < orig_len) {
 111                 *plen = *objlen;
 112                 dout(" skipping last %llu, final file extent %llu~%llu\n",
 113                      orig_len - *plen, off, *plen);
 114         }
 115
 116         dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
 117
 118         return 0;
 119 }
 120
 121 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
 122 {
 123         memset(osd_data, 0, sizeof (*osd_data));
 124         osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
 125 }
 126
 127 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
 128                         struct page **pages, u64 length, u32 alignment,
 129                         bool pages_from_pool, bool own_pages)
 130 {
 131         osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
 132         osd_data->pages = pages;
 133         osd_data->length = length;
 134         osd_data->alignment = alignment;
 135         osd_data->pages_from_pool = pages_from_pool;
 136         osd_data->own_pages = own_pages;
 137 }
 138
 139 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
 140                         struct ceph_pagelist *pagelist)
 141 {
 142         osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
 143         osd_data->pagelist = pagelist;
 144 }
 145
 146 #ifdef CONFIG_BLOCK
 147 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
 148                         struct bio *bio, size_t bio_length)
 149 {
 150         osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
 151         osd_data->bio = bio;
 152         osd_data->bio_length = bio_length;
 153 }
 154 #endif /* CONFIG_BLOCK */
 155
 156 #define osd_req_op_data(oreq, whch, typ, fld)                           \
 157 ({                                                                      \
 158         struct ceph_osd_request *__oreq = (oreq);                       \
 159         unsigned int __whch = (whch);                                   \
 160         BUG_ON(__whch >= __oreq->r_num_ops);                            \
 161         &__oreq->r_ops[__whch].typ.fld;                                 \
 162 })
 163
 164 static struct ceph_osd_data *
 165 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
 166 {
 167         BUG_ON(which >= osd_req->r_num_ops);
 168
 169         return &osd_req->r_ops[which].raw_data_in;
 170 }
 171
 172 struct ceph_osd_data *
 173 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
 174                         unsigned int which)
 175 {
 176         return osd_req_op_data(osd_req, which, extent, osd_data);
 177 }
 178 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
 179
 180 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
 181                         unsigned int which, struct page **pages,
 182                         u64 length, u32 alignment,
 183                         bool pages_from_pool, bool own_pages)
 184 {
 185         struct ceph_osd_data *osd_data;
 186
 187         osd_data = osd_req_op_raw_data_in(osd_req, which);
 188         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 189                                 pages_from_pool, own_pages);
 190 }
 191 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
 192
 193 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
 194                         unsigned int which, struct page **pages,
 195                         u64 length, u32 alignment,
 196                         bool pages_from_pool, bool own_pages)
 197 {
 198         struct ceph_osd_data *osd_data;
 199
 200         osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 201         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 202                                 pages_from_pool, own_pages);
 203 }
 204 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
 205
 206 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
 207                         unsigned int which, struct ceph_pagelist *pagelist)
 208 {
 209         struct ceph_osd_data *osd_data;
 210
 211         osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 212         ceph_osd_data_pagelist_init(osd_data, pagelist);
 213 }
 214 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
 215
 216 #ifdef CONFIG_BLOCK
 217 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
 218                         unsigned int which, struct bio *bio, size_t bio_length)
 219 {
 220         struct ceph_osd_data *osd_data;
 221
 222         osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 223         ceph_osd_data_bio_init(osd_data, bio, bio_length);
 224 }
 225 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
 226 #endif /* CONFIG_BLOCK */
 227
 228 static void osd_req_op_cls_request_info_pagelist(
 229                         struct ceph_osd_request *osd_req,
 230                         unsigned int which, struct ceph_pagelist *pagelist)
 231 {
 232         struct ceph_osd_data *osd_data;
 233
 234         osd_data = osd_req_op_data(osd_req, which, cls, request_info);
 235         ceph_osd_data_pagelist_init(osd_data, pagelist);
 236 }
 237
 238 void osd_req_op_cls_request_data_pagelist(
 239                         struct ceph_osd_request *osd_req,
 240                         unsigned int which, struct ceph_pagelist *pagelist)
 241 {
 242         struct ceph_osd_data *osd_data;
 243
 244         osd_data = osd_req_op_data(osd_req, which, cls, request_data);
 245         ceph_osd_data_pagelist_init(osd_data, pagelist);
 246         osd_req->r_ops[which].cls.indata_len += pagelist->length;
 247         osd_req->r_ops[which].indata_len += pagelist->length;
 248 }
 249 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
 250
 251 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
 252                         unsigned int which, struct page **pages, u64 length,
 253                         u32 alignment, bool pages_from_pool, bool own_pages)
 254 {
 255         struct ceph_osd_data *osd_data;
 256
 257         osd_data = osd_req_op_data(osd_req, which, cls, request_data);
 258         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 259                                 pages_from_pool, own_pages);
 260         osd_req->r_ops[which].cls.indata_len += length;
 261         osd_req->r_ops[which].indata_len += length;
 262 }
 263 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
 264
 265 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
 266                         unsigned int which, struct page **pages, u64 length,
 267                         u32 alignment, bool pages_from_pool, bool own_pages)
 268 {
 269         struct ceph_osd_data *osd_data;
 270
 271         osd_data = osd_req_op_data(osd_req, which, cls, response_data);
 272         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 273                                 pages_from_pool, own_pages);
 274 }
 275 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
 276
 277 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
 278 {
 279         switch (osd_data->type) {
 280         case CEPH_OSD_DATA_TYPE_NONE:
 281                 return 0;
 282         case CEPH_OSD_DATA_TYPE_PAGES:
 283                 return osd_data->length;
 284         case CEPH_OSD_DATA_TYPE_PAGELIST:
 285                 return (u64)osd_data->pagelist->length;
 286 #ifdef CONFIG_BLOCK
 287         case CEPH_OSD_DATA_TYPE_BIO:
 288                 return (u64)osd_data->bio_length;
 289 #endif /* CONFIG_BLOCK */
 290         default:
 291                 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
 292                 return 0;
 293         }
 294 }
 295
 296 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
 297 {
 298         if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
 299                 int num_pages;
 300
 301                 num_pages = calc_pages_for((u64)osd_data->alignment,
 302                                                 (u64)osd_data->length);
 303                 ceph_release_page_vector(osd_data->pages, num_pages);
 304         }
 305         ceph_osd_data_init(osd_data);
 306 }
 307
 308 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
 309                         unsigned int which)
 310 {
 311         struct ceph_osd_req_op *op;
 312
 313         BUG_ON(which >= osd_req->r_num_ops);
 314         op = &osd_req->r_ops[which];
 315
 316         switch (op->op) {
 317         case CEPH_OSD_OP_READ:
 318         case CEPH_OSD_OP_WRITE:
 319         case CEPH_OSD_OP_WRITEFULL:
 320                 ceph_osd_data_release(&op->extent.osd_data);
 321                 break;
 322         case CEPH_OSD_OP_CALL:
 323                 ceph_osd_data_release(&op->cls.request_info);
 324                 ceph_osd_data_release(&op->cls.request_data);
 325                 ceph_osd_data_release(&op->cls.response_data);
 326                 break;
 327         case CEPH_OSD_OP_SETXATTR:
 328         case CEPH_OSD_OP_CMPXATTR:
 329                 ceph_osd_data_release(&op->xattr.osd_data);
 330                 break;
 331         case CEPH_OSD_OP_STAT:
 332                 ceph_osd_data_release(&op->raw_data_in);
 333                 break;
 334         case CEPH_OSD_OP_NOTIFY_ACK:
 335                 ceph_osd_data_release(&op->notify_ack.request_data);
 336                 break;
 337         case CEPH_OSD_OP_NOTIFY:
 338                 ceph_osd_data_release(&op->notify.request_data);
 339                 ceph_osd_data_release(&op->notify.response_data);
 340                 break;
 341         default:
 342                 break;
 343         }
 344 }
 345
 346 /*
 347  * Assumes @t is zero-initialized.
 348  */
 349 static void target_init(struct ceph_osd_request_target *t)
 350 {
 351         ceph_oid_init(&t->base_oid);
 352         ceph_oloc_init(&t->base_oloc);
 353         ceph_oid_init(&t->target_oid);
 354         ceph_oloc_init(&t->target_oloc);
 355
 356         ceph_osds_init(&t->acting);
 357         ceph_osds_init(&t->up);
 358         t->size = -1;
 359         t->min_size = -1;
 360
 361         t->osd = CEPH_HOMELESS_OSD;
 362 }
 363
 364 static void target_copy(struct ceph_osd_request_target *dest,
 365                         const struct ceph_osd_request_target *src)
 366 {
 367         ceph_oid_copy(&dest->base_oid, &src->base_oid);
 368         ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
 369         ceph_oid_copy(&dest->target_oid, &src->target_oid);
 370         ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
 371
 372         dest->pgid = src->pgid; /* struct */
 373         dest->pg_num = src->pg_num;
 374         dest->pg_num_mask = src->pg_num_mask;
 375         ceph_osds_copy(&dest->acting, &src->acting);
 376         ceph_osds_copy(&dest->up, &src->up);
 377         dest->size = src->size;
 378         dest->min_size = src->min_size;
 379         dest->sort_bitwise = src->sort_bitwise;
 380
 381         dest->flags = src->flags;
 382         dest->paused = src->paused;
 383
 384         dest->osd = src->osd;
 385 }
 386
 387 static void target_destroy(struct ceph_osd_request_target *t)
 388 {
 389         ceph_oid_destroy(&t->base_oid);
 390         ceph_oid_destroy(&t->target_oid);
 391 }
 392
 393 /*
 394  * requests
 395  */
 396 static void request_release_checks(struct ceph_osd_request *req)
 397 {
 398         WARN_ON(!RB_EMPTY_NODE(&req->r_node));
 399         WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
 400         WARN_ON(!list_empty(&req->r_unsafe_item));
 401         WARN_ON(req->r_osd);
 402 }
 403
 404 static void ceph_osdc_release_request(struct kref *kref)
 405 {
 406         struct ceph_osd_request *req = container_of(kref,
 407                                             struct ceph_osd_request, r_kref);
 408         unsigned int which;
 409
 410         dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
 411              req->r_request, req->r_reply);
 412         request_release_checks(req);
 413
 414         if (req->r_request)
 415                 ceph_msg_put(req->r_request);
 416         if (req->r_reply)
 417                 ceph_msg_put(req->r_reply);
 418
 419         for (which = 0; which < req->r_num_ops; which++)
 420                 osd_req_op_data_release(req, which);
 421
 422         target_destroy(&req->r_t);
 423         ceph_put_snap_context(req->r_snapc);
 424
 425         if (req->r_mempool)
 426                 mempool_free(req, req->r_osdc->req_mempool);
 427         else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
 428                 kmem_cache_free(ceph_osd_request_cache, req);
 429         else
 430                 kfree(req);
 431 }
 432
 433 void ceph_osdc_get_request(struct ceph_osd_request *req)
 434 {
 435         dout("%s %p (was %d)\n", __func__, req,
 436              atomic_read(&req->r_kref.refcount));
 437         kref_get(&req->r_kref);
 438 }
 439 EXPORT_SYMBOL(ceph_osdc_get_request);
 440
 441 void ceph_osdc_put_request(struct ceph_osd_request *req)
 442 {
 443         if (req) {
 444                 dout("%s %p (was %d)\n", __func__, req,
 445                      atomic_read(&req->r_kref.refcount));
 446                 kref_put(&req->r_kref, ceph_osdc_release_request);
 447         }
 448 }
 449 EXPORT_SYMBOL(ceph_osdc_put_request);
 450
 451 static void request_init(struct ceph_osd_request *req)
 452 {
 453         /* req only, each op is zeroed in _osd_req_op_init() */
 454         memset(req, 0, sizeof(*req));
 455
 456         kref_init(&req->r_kref);
 457         init_completion(&req->r_completion);
 458         init_completion(&req->r_safe_completion);
 459         RB_CLEAR_NODE(&req->r_node);
 460         RB_CLEAR_NODE(&req->r_mc_node);
 461         INIT_LIST_HEAD(&req->r_unsafe_item);
 462
 463         target_init(&req->r_t);
 464 }
 465
 466 /*
 467  * This is ugly, but it allows us to reuse linger registration and ping
 468  * requests, keeping the structure of the code around send_linger{_ping}()
 469  * reasonable.  Setting up a min_nr=2 mempool for each linger request
 470  * and dealing with copying ops (this blasts req only, watch op remains
 471  * intact) isn't any better.
 472  */
 473 static void request_reinit(struct ceph_osd_request *req)
 474 {
 475         struct ceph_osd_client *osdc = req->r_osdc;
 476         bool mempool = req->r_mempool;
 477         unsigned int num_ops = req->r_num_ops;
 478         u64 snapid = req->r_snapid;
 479         struct ceph_snap_context *snapc = req->r_snapc;
 480         bool linger = req->r_linger;
 481         struct ceph_msg *request_msg = req->r_request;
 482         struct ceph_msg *reply_msg = req->r_reply;
 483
 484         dout("%s req %p\n", __func__, req);
 485         WARN_ON(atomic_read(&req->r_kref.refcount) != 1);
 486         request_release_checks(req);
 487
 488         WARN_ON(atomic_read(&request_msg->kref.refcount) != 1);
 489         WARN_ON(atomic_read(&reply_msg->kref.refcount) != 1);
 490         target_destroy(&req->r_t);
 491
 492         request_init(req);
 493         req->r_osdc = osdc;
 494         req->r_mempool = mempool;
 495         req->r_num_ops = num_ops;
 496         req->r_snapid = snapid;
 497         req->r_snapc = snapc;
 498         req->r_linger = linger;
 499         req->r_request = request_msg;
 500         req->r_reply = reply_msg;
 501 }
 502
 503 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
 504                                                struct ceph_snap_context *snapc,
 505                                                unsigned int num_ops,
 506                                                bool use_mempool,
 507                                                gfp_t gfp_flags)
 508 {
 509         struct ceph_osd_request *req;
 510
 511         if (use_mempool) {
 512                 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
 513                 req = mempool_alloc(osdc->req_mempool, gfp_flags);
 514         } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
 515                 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
 516         } else {
 517                 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
 518                 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
 519                               gfp_flags);
 520         }
 521         if (unlikely(!req))
 522                 return NULL;
 523
 524         request_init(req);
 525         req->r_osdc = osdc;
 526         req->r_mempool = use_mempool;
 527         req->r_num_ops = num_ops;
 528         req->r_snapid = CEPH_NOSNAP;
 529         req->r_snapc = ceph_get_snap_context(snapc);
 530
 531         dout("%s req %p\n", __func__, req);
 532         return req;
 533 }
 534 EXPORT_SYMBOL(ceph_osdc_alloc_request);
 535
 536 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
 537 {
 538         struct ceph_osd_client *osdc = req->r_osdc;
 539         struct ceph_msg *msg;
 540         int msg_size;
 541
 542         WARN_ON(ceph_oid_empty(&req->r_base_oid));
 543
 544         /* create request message */
 545         msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
 546         msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
 547         msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
 548         msg_size += 1 + 8 + 4 + 4; /* pgid */
 549         msg_size += 4 + req->r_base_oid.name_len; /* oid */
 550         msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
 551         msg_size += 8; /* snapid */
 552         msg_size += 8; /* snap_seq */
 553         msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
 554         msg_size += 4; /* retry_attempt */
 555
 556         if (req->r_mempool)
 557                 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
 558         else
 559                 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
 560         if (!msg)
 561                 return -ENOMEM;
 562
 563         memset(msg->front.iov_base, 0, msg->front.iov_len);
 564         req->r_request = msg;
 565
 566         /* create reply message */
 567         msg_size = OSD_OPREPLY_FRONT_LEN;
 568         msg_size += req->r_base_oid.name_len;
 569         msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
 570
 571         if (req->r_mempool)
 572                 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
 573         else
 574                 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
 575         if (!msg)
 576                 return -ENOMEM;
 577
 578         req->r_reply = msg;
 579
 580         return 0;
 581 }
 582 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
 583
 584 static bool osd_req_opcode_valid(u16 opcode)
 585 {
 586         switch (opcode) {
 587 #define GENERATE_CASE(op, opcode, str)  case CEPH_OSD_OP_##op: return true;
 588 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
 589 #undef GENERATE_CASE
 590         default:
 591                 return false;
 592         }
 593 }
 594
 595 /*
 596  * This is an osd op init function for opcodes that have no data or
 597  * other information associated with them.  It also serves as a
 598  * common init routine for all the other init functions, below.
 599  */
 600 static struct ceph_osd_req_op *
 601 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
 602                  u16 opcode, u32 flags)
 603 {
 604         struct ceph_osd_req_op *op;
 605
 606         BUG_ON(which >= osd_req->r_num_ops);
 607         BUG_ON(!osd_req_opcode_valid(opcode));
 608
 609         op = &osd_req->r_ops[which];
 610         memset(op, 0, sizeof (*op));
 611         op->op = opcode;
 612         op->flags = flags;
 613
 614         return op;
 615 }
 616
 617 void osd_req_op_init(struct ceph_osd_request *osd_req,
 618                      unsigned int which, u16 opcode, u32 flags)
 619 {
 620         (void)_osd_req_op_init(osd_req, which, opcode, flags);
 621 }
 622 EXPORT_SYMBOL(osd_req_op_init);
 623
 624 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
 625                                 unsigned int which, u16 opcode,
 626                                 u64 offset, u64 length,
 627                                 u64 truncate_size, u32 truncate_seq)
 628 {
 629         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 630                                                       opcode, 0);
 631         size_t payload_len = 0;
 632
 633         BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
 634                opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
 635                opcode != CEPH_OSD_OP_TRUNCATE);
 636
 637         op->extent.offset = offset;
 638         op->extent.length = length;
 639         op->extent.truncate_size = truncate_size;
 640         op->extent.truncate_seq = truncate_seq;
 641         if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
 642                 payload_len += length;
 643
 644         op->indata_len = payload_len;
 645 }
 646 EXPORT_SYMBOL(osd_req_op_extent_init);
 647
 648 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
 649                                 unsigned int which, u64 length)
 650 {
 651         struct ceph_osd_req_op *op;
 652         u64 previous;
 653
 654         BUG_ON(which >= osd_req->r_num_ops);
 655         op = &osd_req->r_ops[which];
 656         previous = op->extent.length;
 657
 658         if (length == previous)
 659                 return;         /* Nothing to do */
 660         BUG_ON(length > previous);
 661
 662         op->extent.length = length;
 663         op->indata_len -= previous - length;
 664 }
 665 EXPORT_SYMBOL(osd_req_op_extent_update);
 666
 667 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
 668                                 unsigned int which, u64 offset_inc)
 669 {
 670         struct ceph_osd_req_op *op, *prev_op;
 671
 672         BUG_ON(which + 1 >= osd_req->r_num_ops);
 673
 674         prev_op = &osd_req->r_ops[which];
 675         op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
 676         /* dup previous one */
 677         op->indata_len = prev_op->indata_len;
 678         op->outdata_len = prev_op->outdata_len;
 679         op->extent = prev_op->extent;
 680         /* adjust offset */
 681         op->extent.offset += offset_inc;
 682         op->extent.length -= offset_inc;
 683
 684         if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
 685                 op->indata_len -= offset_inc;
 686 }
 687 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
 688
 689 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
 690                         u16 opcode, const char *class, const char *method)
 691 {
 692         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 693                                                       opcode, 0);
 694         struct ceph_pagelist *pagelist;
 695         size_t payload_len = 0;
 696         size_t size;
 697
 698         BUG_ON(opcode != CEPH_OSD_OP_CALL);
 699
 700         pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
 701         BUG_ON(!pagelist);
 702         ceph_pagelist_init(pagelist);
 703
 704         op->cls.class_name = class;
 705         size = strlen(class);
 706         BUG_ON(size > (size_t) U8_MAX);
 707         op->cls.class_len = size;
 708         ceph_pagelist_append(pagelist, class, size);
 709         payload_len += size;
 710
 711         op->cls.method_name = method;
 712         size = strlen(method);
 713         BUG_ON(size > (size_t) U8_MAX);
 714         op->cls.method_len = size;
 715         ceph_pagelist_append(pagelist, method, size);
 716         payload_len += size;
 717
 718         osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
 719
 720         op->indata_len = payload_len;
 721 }
 722 EXPORT_SYMBOL(osd_req_op_cls_init);
 723
 724 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
 725                           u16 opcode, const char *name, const void *value,
 726                           size_t size, u8 cmp_op, u8 cmp_mode)
 727 {
 728         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 729                                                       opcode, 0);
 730         struct ceph_pagelist *pagelist;
 731         size_t payload_len;
 732
 733         BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
 734
 735         pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
 736         if (!pagelist)
 737                 return -ENOMEM;
 738
 739         ceph_pagelist_init(pagelist);
 740
 741         payload_len = strlen(name);
 742         op->xattr.name_len = payload_len;
 743         ceph_pagelist_append(pagelist, name, payload_len);
 744
 745         op->xattr.value_len = size;
 746         ceph_pagelist_append(pagelist, value, size);
 747         payload_len += size;
 748
 749         op->xattr.cmp_op = cmp_op;
 750         op->xattr.cmp_mode = cmp_mode;
 751
 752         ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
 753         op->indata_len = payload_len;
 754         return 0;
 755 }
 756 EXPORT_SYMBOL(osd_req_op_xattr_init);
 757
 758 /*
 759  * @watch_opcode: CEPH_OSD_WATCH_OP_*
 760  */
 761 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
 762                                   u64 cookie, u8 watch_opcode)
 763 {
 764         struct ceph_osd_req_op *op;
 765
 766         op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
 767         op->watch.cookie = cookie;
 768         op->watch.op = watch_opcode;
 769         op->watch.gen = 0;
 770 }
 771
 772 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
 773                                 unsigned int which,
 774                                 u64 expected_object_size,
 775                                 u64 expected_write_size)
 776 {
 777         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 778                                                       CEPH_OSD_OP_SETALLOCHINT,
 779                                                       0);
 780
 781         op->alloc_hint.expected_object_size = expected_object_size;
 782         op->alloc_hint.expected_write_size = expected_write_size;
 783
 784         /*
 785          * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
 786          * not worth a feature bit.  Set FAILOK per-op flag to make
 787          * sure older osds don't trip over an unsupported opcode.
 788          */
 789         op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
 790 }
 791 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
 792
 793 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
 794                                 struct ceph_osd_data *osd_data)
 795 {
 796         u64 length = ceph_osd_data_length(osd_data);
 797
 798         if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
 799                 BUG_ON(length > (u64) SIZE_MAX);
 800                 if (length)
 801                         ceph_msg_data_add_pages(msg, osd_data->pages,
 802                                         length, osd_data->alignment);
 803         } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
 804                 BUG_ON(!length);
 805                 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
 806 #ifdef CONFIG_BLOCK
 807         } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
 808                 ceph_msg_data_add_bio(msg, osd_data->bio, length);
 809 #endif
 810         } else {
 811                 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
 812         }
 813 }
 814
 815 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
 816                              const struct ceph_osd_req_op *src)
 817 {
 818         if (WARN_ON(!osd_req_opcode_valid(src->op))) {
 819                 pr_err("unrecognized osd opcode %d\n", src->op);
 820
 821                 return 0;
 822         }
 823
 824         switch (src->op) {
 825         case CEPH_OSD_OP_STAT:
 826                 break;
 827         case CEPH_OSD_OP_READ:
 828         case CEPH_OSD_OP_WRITE:
 829         case CEPH_OSD_OP_WRITEFULL:
 830         case CEPH_OSD_OP_ZERO:
 831         case CEPH_OSD_OP_TRUNCATE:
 832                 dst->extent.offset = cpu_to_le64(src->extent.offset);
 833                 dst->extent.length = cpu_to_le64(src->extent.length);
 834                 dst->extent.truncate_size =
 835                         cpu_to_le64(src->extent.truncate_size);
 836                 dst->extent.truncate_seq =
 837                         cpu_to_le32(src->extent.truncate_seq);
 838                 break;
 839         case CEPH_OSD_OP_CALL:
 840                 dst->cls.class_len = src->cls.class_len;
 841                 dst->cls.method_len = src->cls.method_len;
 842                 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
 843                 break;
 844         case CEPH_OSD_OP_STARTSYNC:
 845                 break;
 846         case CEPH_OSD_OP_WATCH:
 847                 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
 848                 dst->watch.ver = cpu_to_le64(0);
 849                 dst->watch.op = src->watch.op;
 850                 dst->watch.gen = cpu_to_le32(src->watch.gen);
 851                 break;
 852         case CEPH_OSD_OP_NOTIFY_ACK:
 853                 break;
 854         case CEPH_OSD_OP_NOTIFY:
 855                 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
 856                 break;
 857         case CEPH_OSD_OP_SETALLOCHINT:
 858                 dst->alloc_hint.expected_object_size =
 859                     cpu_to_le64(src->alloc_hint.expected_object_size);
 860                 dst->alloc_hint.expected_write_size =
 861                     cpu_to_le64(src->alloc_hint.expected_write_size);
 862                 break;
 863         case CEPH_OSD_OP_SETXATTR:
 864         case CEPH_OSD_OP_CMPXATTR:
 865                 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
 866                 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
 867                 dst->xattr.cmp_op = src->xattr.cmp_op;
 868                 dst->xattr.cmp_mode = src->xattr.cmp_mode;
 869                 break;
 870         case CEPH_OSD_OP_CREATE:
 871         case CEPH_OSD_OP_DELETE:
 872                 break;
 873         default:
 874                 pr_err("unsupported osd opcode %s\n",
 875                         ceph_osd_op_name(src->op));
 876                 WARN_ON(1);
 877
 878                 return 0;
 879         }
 880
 881         dst->op = cpu_to_le16(src->op);
 882         dst->flags = cpu_to_le32(src->flags);
 883         dst->payload_len = cpu_to_le32(src->indata_len);
 884
 885         return src->indata_len;
 886 }
 887
 888 /*
 889  * build new request AND message, calculate layout, and adjust file
 890  * extent as needed.
 891  *
 892  * if the file was recently truncated, we include information about its
 893  * old and new size so that the object can be updated appropriately.  (we
 894  * avoid synchronously deleting truncated objects because it's slow.)
 895  *
 896  * if @do_sync, include a 'startsync' command so that the osd will flush
 897  * data quickly.
 898  */
 899 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
 900                                                struct ceph_file_layout *layout,
 901                                                struct ceph_vino vino,
 902                                                u64 off, u64 *plen,
 903                                                unsigned int which, int num_ops,
 904                                                int opcode, int flags,
 905                                                struct ceph_snap_context *snapc,
 906                                                u32 truncate_seq,
 907                                                u64 truncate_size,
 908                                                bool use_mempool)
 909 {
 910         struct ceph_osd_request *req;
 911         u64 objnum = 0;
 912         u64 objoff = 0;
 913         u64 objlen = 0;
 914         int r;
 915
 916         BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
 917                opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
 918                opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
 919
 920         req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
 921                                         GFP_NOFS);
 922         if (!req) {
 923                 r = -ENOMEM;
 924                 goto fail;
 925         }
 926
 927         /* calculate max write size */
 928         r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
 929         if (r)
 930                 goto fail;
 931
 932         if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
 933                 osd_req_op_init(req, which, opcode, 0);
 934         } else {
 935                 u32 object_size = le32_to_cpu(layout->fl_object_size);
 936                 u32 object_base = off - objoff;
 937                 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
 938                         if (truncate_size <= object_base) {
 939                                 truncate_size = 0;
 940                         } else {
 941                                 truncate_size -= object_base;
 942                                 if (truncate_size > object_size)
 943                                         truncate_size = object_size;
 944                         }
 945                 }
 946                 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
 947                                        truncate_size, truncate_seq);
 948         }
 949
 950         req->r_flags = flags;
 951         req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
 952         ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
 953
 954         req->r_snapid = vino.snap;
 955         if (flags & CEPH_OSD_FLAG_WRITE)
 956                 req->r_data_offset = off;
 957
 958         r = ceph_osdc_alloc_messages(req, GFP_NOFS);
 959         if (r)
 960                 goto fail;
 961
 962         return req;
 963
 964 fail:
 965         ceph_osdc_put_request(req);
 966         return ERR_PTR(r);
 967 }
 968 EXPORT_SYMBOL(ceph_osdc_new_request);
 969
 970 /*
 971  * We keep osd requests in an rbtree, sorted by ->r_tid.
 972  */
 973 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
 974 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
 975
 976 static bool osd_homeless(struct ceph_osd *osd)
 977 {
 978         return osd->o_osd == CEPH_HOMELESS_OSD;
 979 }
 980
 981 static bool osd_registered(struct ceph_osd *osd)
 982 {
 983         verify_osdc_locked(osd->o_osdc);
 984
 985         return !RB_EMPTY_NODE(&osd->o_node);
 986 }
 987
 988 /*
 989  * Assumes @osd is zero-initialized.
 990  */
 991 static void osd_init(struct ceph_osd *osd)
 992 {
 993         atomic_set(&osd->o_ref, 1);
 994         RB_CLEAR_NODE(&osd->o_node);
 995         osd->o_requests = RB_ROOT;
 996         osd->o_linger_requests = RB_ROOT;
 997         INIT_LIST_HEAD(&osd->o_osd_lru);
 998         INIT_LIST_HEAD(&osd->o_keepalive_item);
 999         osd->o_incarnation = 1;
1000         mutex_init(&osd->lock);
1001 }
1002
1003 static void osd_cleanup(struct ceph_osd *osd)
1004 {
1005         WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1006         WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1007         WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1008         WARN_ON(!list_empty(&osd->o_osd_lru));
1009         WARN_ON(!list_empty(&osd->o_keepalive_item));
1010
1011         if (osd->o_auth.authorizer) {
1012                 WARN_ON(osd_homeless(osd));
1013                 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1014         }
1015 }
1016
1017 /*
1018  * Track open sessions with osds.
1019  */
1020 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1021 {
1022         struct ceph_osd *osd;
1023
1024         WARN_ON(onum == CEPH_HOMELESS_OSD);
1025
1026         osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1027         osd_init(osd);
1028         osd->o_osdc = osdc;
1029         osd->o_osd = onum;
1030
1031         ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1032
1033         return osd;
1034 }
1035
1036 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1037 {
1038         if (atomic_inc_not_zero(&osd->o_ref)) {
1039                 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1040                      atomic_read(&osd->o_ref));
1041                 return osd;
1042         } else {
1043                 dout("get_osd %p FAIL\n", osd);
1044                 return NULL;
1045         }
1046 }
1047
1048 static void put_osd(struct ceph_osd *osd)
1049 {
1050         dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1051              atomic_read(&osd->o_ref) - 1);
1052         if (atomic_dec_and_test(&osd->o_ref)) {
1053                 osd_cleanup(osd);
1054                 kfree(osd);
1055         }
1056 }
1057
1058 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1059
1060 static void __move_osd_to_lru(struct ceph_osd *osd)
1061 {
1062         struct ceph_osd_client *osdc = osd->o_osdc;
1063
1064         dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1065         BUG_ON(!list_empty(&osd->o_osd_lru));
1066
1067         spin_lock(&osdc->osd_lru_lock);
1068         list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1069         spin_unlock(&osdc->osd_lru_lock);
1070
1071         osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1072 }
1073
1074 static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1075 {
1076         if (RB_EMPTY_ROOT(&osd->o_requests) &&
1077             RB_EMPTY_ROOT(&osd->o_linger_requests))
1078                 __move_osd_to_lru(osd);
1079 }
1080
1081 static void __remove_osd_from_lru(struct ceph_osd *osd)
1082 {
1083         struct ceph_osd_client *osdc = osd->o_osdc;
1084
1085         dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1086
1087         spin_lock(&osdc->osd_lru_lock);
1088         if (!list_empty(&osd->o_osd_lru))
1089                 list_del_init(&osd->o_osd_lru);
1090         spin_unlock(&osdc->osd_lru_lock);
1091 }
1092
1093 /*
1094  * Close the connection and assign any leftover requests to the
1095  * homeless session.
1096  */
1097 static void close_osd(struct ceph_osd *osd)
1098 {
1099         struct ceph_osd_client *osdc = osd->o_osdc;
1100         struct rb_node *n;
1101
1102         verify_osdc_wrlocked(osdc);
1103         dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1104
1105         ceph_con_close(&osd->o_con);
1106
1107         for (n = rb_first(&osd->o_requests); n; ) {
1108                 struct ceph_osd_request *req =
1109                     rb_entry(n, struct ceph_osd_request, r_node);
1110
1111                 n = rb_next(n); /* unlink_request() */
1112
1113                 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1114                 unlink_request(osd, req);
1115                 link_request(&osdc->homeless_osd, req);
1116         }
1117         for (n = rb_first(&osd->o_linger_requests); n; ) {
1118                 struct ceph_osd_linger_request *lreq =
1119                     rb_entry(n, struct ceph_osd_linger_request, node);
1120
1121                 n = rb_next(n); /* unlink_linger() */
1122
1123                 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1124                      lreq->linger_id);
1125                 unlink_linger(osd, lreq);
1126                 link_linger(&osdc->homeless_osd, lreq);
1127         }
1128
1129         __remove_osd_from_lru(osd);
1130         erase_osd(&osdc->osds, osd);
1131         put_osd(osd);
1132 }
1133
1134 /*
1135  * reset osd connect
1136  */
1137 static int reopen_osd(struct ceph_osd *osd)
1138 {
1139         struct ceph_entity_addr *peer_addr;
1140
1141         dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1142
1143         if (RB_EMPTY_ROOT(&osd->o_requests) &&
1144             RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1145                 close_osd(osd);
1146                 return -ENODEV;
1147         }
1148
1149         peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1150         if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1151                         !ceph_con_opened(&osd->o_con)) {
1152                 struct rb_node *n;
1153
1154                 dout("osd addr hasn't changed and connection never opened, "
1155                      "letting msgr retry\n");
1156                 /* touch each r_stamp for handle_timeout()'s benfit */
1157                 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1158                         struct ceph_osd_request *req =
1159                             rb_entry(n, struct ceph_osd_request, r_node);
1160                         req->r_stamp = jiffies;
1161                 }
1162
1163                 return -EAGAIN;
1164         }
1165
1166         ceph_con_close(&osd->o_con);
1167         ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1168         osd->o_incarnation++;
1169
1170         return 0;
1171 }
1172
1173 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1174                                           bool wrlocked)
1175 {
1176         struct ceph_osd *osd;
1177
1178         if (wrlocked)
1179                 verify_osdc_wrlocked(osdc);
1180         else
1181                 verify_osdc_locked(osdc);
1182
1183         if (o != CEPH_HOMELESS_OSD)
1184                 osd = lookup_osd(&osdc->osds, o);
1185         else
1186                 osd = &osdc->homeless_osd;
1187         if (!osd) {
1188                 if (!wrlocked)
1189                         return ERR_PTR(-EAGAIN);
1190
1191                 osd = create_osd(osdc, o);
1192                 insert_osd(&osdc->osds, osd);
1193                 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1194                               &osdc->osdmap->osd_addr[osd->o_osd]);
1195         }
1196
1197         dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1198         return osd;
1199 }
1200
1201 /*
1202  * Create request <-> OSD session relation.
1203  *
1204  * @req has to be assigned a tid, @osd may be homeless.
1205  */
1206 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1207 {
1208         verify_osd_locked(osd);
1209         WARN_ON(!req->r_tid || req->r_osd);
1210         dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1211              req, req->r_tid);
1212
1213         if (!osd_homeless(osd))
1214                 __remove_osd_from_lru(osd);
1215         else
1216                 atomic_inc(&osd->o_osdc->num_homeless);
1217
1218         get_osd(osd);
1219         insert_request(&osd->o_requests, req);
1220         req->r_osd = osd;
1221 }
1222
1223 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1224 {
1225         verify_osd_locked(osd);
1226         WARN_ON(req->r_osd != osd);
1227         dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1228              req, req->r_tid);
1229
1230         req->r_osd = NULL;
1231         erase_request(&osd->o_requests, req);
1232         put_osd(osd);
1233
1234         if (!osd_homeless(osd))
1235                 maybe_move_osd_to_lru(osd);
1236         else
1237                 atomic_dec(&osd->o_osdc->num_homeless);
1238 }
1239
1240 static bool __pool_full(struct ceph_pg_pool_info *pi)
1241 {
1242         return pi->flags & CEPH_POOL_FLAG_FULL;
1243 }
1244
1245 static bool have_pool_full(struct ceph_osd_client *osdc)
1246 {
1247         struct rb_node *n;
1248
1249         for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1250                 struct ceph_pg_pool_info *pi =
1251                     rb_entry(n, struct ceph_pg_pool_info, node);
1252
1253                 if (__pool_full(pi))
1254                         return true;
1255         }
1256
1257         return false;
1258 }
1259
1260 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1261 {
1262         struct ceph_pg_pool_info *pi;
1263
1264         pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1265         if (!pi)
1266                 return false;
1267
1268         return __pool_full(pi);
1269 }
1270
1271 /*
1272  * Returns whether a request should be blocked from being sent
1273  * based on the current osdmap and osd_client settings.
1274  */
1275 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1276                                     const struct ceph_osd_request_target *t,
1277                                     struct ceph_pg_pool_info *pi)
1278 {
1279         bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1280         bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1281                        ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1282                        __pool_full(pi);
1283
1284         WARN_ON(pi->id != t->base_oloc.pool);
1285         return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
1286                (t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
1287 }
1288
1289 enum calc_target_result {
1290         CALC_TARGET_NO_ACTION = 0,
1291         CALC_TARGET_NEED_RESEND,
1292         CALC_TARGET_POOL_DNE,
1293 };
1294
1295 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1296                                            struct ceph_osd_request_target *t,
1297                                            u32 *last_force_resend,
1298                                            bool any_change)
1299 {
1300         struct ceph_pg_pool_info *pi;
1301         struct ceph_pg pgid, last_pgid;
1302         struct ceph_osds up, acting;
1303         bool force_resend = false;
1304         bool need_check_tiering = false;
1305         bool need_resend = false;
1306         bool sort_bitwise = ceph_osdmap_flag(osdc->osdmap,
1307                                              CEPH_OSDMAP_SORTBITWISE);
1308         enum calc_target_result ct_res;
1309         int ret;
1310
1311         pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1312         if (!pi) {
1313                 t->osd = CEPH_HOMELESS_OSD;
1314                 ct_res = CALC_TARGET_POOL_DNE;
1315                 goto out;
1316         }
1317
1318         if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1319                 if (last_force_resend &&
1320                     *last_force_resend < pi->last_force_request_resend) {
1321                         *last_force_resend = pi->last_force_request_resend;
1322                         force_resend = true;
1323                 } else if (!last_force_resend) {
1324                         force_resend = true;
1325                 }
1326         }
1327         if (ceph_oid_empty(&t->target_oid) || force_resend) {
1328                 ceph_oid_copy(&t->target_oid, &t->base_oid);
1329                 need_check_tiering = true;
1330         }
1331         if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
1332                 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1333                 need_check_tiering = true;
1334         }
1335
1336         if (need_check_tiering &&
1337             (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1338                 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1339                         t->target_oloc.pool = pi->read_tier;
1340                 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1341                         t->target_oloc.pool = pi->write_tier;
1342         }
1343
1344         ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
1345                                         &t->target_oloc, &pgid);
1346         if (ret) {
1347                 WARN_ON(ret != -ENOENT);
1348                 t->osd = CEPH_HOMELESS_OSD;
1349                 ct_res = CALC_TARGET_POOL_DNE;
1350                 goto out;
1351         }
1352         last_pgid.pool = pgid.pool;
1353         last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1354
1355         ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
1356         if (any_change &&
1357             ceph_is_new_interval(&t->acting,
1358                                  &acting,
1359                                  &t->up,
1360                                  &up,
1361                                  t->size,
1362                                  pi->size,
1363                                  t->min_size,
1364                                  pi->min_size,
1365                                  t->pg_num,
1366                                  pi->pg_num,
1367                                  t->sort_bitwise,
1368                                  sort_bitwise,
1369                                  &last_pgid))
1370                 force_resend = true;
1371
1372         if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1373                 t->paused = false;
1374                 need_resend = true;
1375         }
1376
1377         if (ceph_pg_compare(&t->pgid, &pgid) ||
1378             ceph_osds_changed(&t->acting, &acting, any_change) ||
1379             force_resend) {
1380                 t->pgid = pgid; /* struct */
1381                 ceph_osds_copy(&t->acting, &acting);
1382                 ceph_osds_copy(&t->up, &up);
1383                 t->size = pi->size;
1384                 t->min_size = pi->min_size;
1385                 t->pg_num = pi->pg_num;
1386                 t->pg_num_mask = pi->pg_num_mask;
1387                 t->sort_bitwise = sort_bitwise;
1388
1389                 t->osd = acting.primary;
1390                 need_resend = true;
1391         }
1392
1393         ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
1394 out:
1395         dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1396         return ct_res;
1397 }
1398
1399 static void setup_request_data(struct ceph_osd_request *req,
1400                                struct ceph_msg *msg)
1401 {
1402         u32 data_len = 0;
1403         int i;
1404
1405         if (!list_empty(&msg->data))
1406                 return;
1407
1408         WARN_ON(msg->data_length);
1409         for (i = 0; i < req->r_num_ops; i++) {
1410                 struct ceph_osd_req_op *op = &req->r_ops[i];
1411
1412                 switch (op->op) {
1413                 /* request */
1414                 case CEPH_OSD_OP_WRITE:
1415                 case CEPH_OSD_OP_WRITEFULL:
1416                         WARN_ON(op->indata_len != op->extent.length);
1417                         ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1418                         break;
1419                 case CEPH_OSD_OP_SETXATTR:
1420                 case CEPH_OSD_OP_CMPXATTR:
1421                         WARN_ON(op->indata_len != op->xattr.name_len +
1422                                                   op->xattr.value_len);
1423                         ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1424                         break;
1425                 case CEPH_OSD_OP_NOTIFY_ACK:
1426                         ceph_osdc_msg_data_add(msg,
1427                                                &op->notify_ack.request_data);
1428                         break;
1429
1430                 /* reply */
1431                 case CEPH_OSD_OP_STAT:
1432                         ceph_osdc_msg_data_add(req->r_reply,
1433                                                &op->raw_data_in);
1434                         break;
1435                 case CEPH_OSD_OP_READ:
1436                         ceph_osdc_msg_data_add(req->r_reply,
1437                                                &op->extent.osd_data);
1438                         break;
1439
1440                 /* both */
1441                 case CEPH_OSD_OP_CALL:
1442                         WARN_ON(op->indata_len != op->cls.class_len +
1443                                                   op->cls.method_len +
1444                                                   op->cls.indata_len);
1445                         ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1446                         /* optional, can be NONE */
1447                         ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1448                         /* optional, can be NONE */
1449                         ceph_osdc_msg_data_add(req->r_reply,
1450                                                &op->cls.response_data);
1451                         break;
1452                 case CEPH_OSD_OP_NOTIFY:
1453                         ceph_osdc_msg_data_add(msg,
1454                                                &op->notify.request_data);
1455                         ceph_osdc_msg_data_add(req->r_reply,
1456                                                &op->notify.response_data);
1457                         break;
1458                 }
1459
1460                 data_len += op->indata_len;
1461         }
1462
1463         WARN_ON(data_len != msg->data_length);
1464 }
1465
1466 static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
1467 {
1468         void *p = msg->front.iov_base;
1469         void *const end = p + msg->front_alloc_len;
1470         u32 data_len = 0;
1471         int i;
1472
1473         if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1474                 /* snapshots aren't writeable */
1475                 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1476         } else {
1477                 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1478                         req->r_data_offset || req->r_snapc);
1479         }
1480
1481         setup_request_data(req, msg);
1482
1483         ceph_encode_32(&p, 1); /* client_inc, always 1 */
1484         ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1485         ceph_encode_32(&p, req->r_flags);
1486         ceph_encode_timespec(p, &req->r_mtime);
1487         p += sizeof(struct ceph_timespec);
1488         /* aka reassert_version */
1489         memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
1490         p += sizeof(req->r_replay_version);
1491
1492         /* oloc */
1493         ceph_encode_8(&p, 4);
1494         ceph_encode_8(&p, 4);
1495         ceph_encode_32(&p, 8 + 4 + 4);
1496         ceph_encode_64(&p, req->r_t.target_oloc.pool);
1497         ceph_encode_32(&p, -1); /* preferred */
1498         ceph_encode_32(&p, 0); /* key len */
1499
1500         /* pgid */
1501         ceph_encode_8(&p, 1);
1502         ceph_encode_64(&p, req->r_t.pgid.pool);
1503         ceph_encode_32(&p, req->r_t.pgid.seed);
1504         ceph_encode_32(&p, -1); /* preferred */
1505
1506         /* oid */
1507         ceph_encode_32(&p, req->r_t.target_oid.name_len);
1508         memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
1509         p += req->r_t.target_oid.name_len;
1510
1511         /* ops, can imply data */
1512         ceph_encode_16(&p, req->r_num_ops);
1513         for (i = 0; i < req->r_num_ops; i++) {
1514                 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1515                 p += sizeof(struct ceph_osd_op);
1516         }
1517
1518         ceph_encode_64(&p, req->r_snapid); /* snapid */
1519         if (req->r_snapc) {
1520                 ceph_encode_64(&p, req->r_snapc->seq);
1521                 ceph_encode_32(&p, req->r_snapc->num_snaps);
1522                 for (i = 0; i < req->r_snapc->num_snaps; i++)
1523                         ceph_encode_64(&p, req->r_snapc->snaps[i]);
1524         } else {
1525                 ceph_encode_64(&p, 0); /* snap_seq */
1526                 ceph_encode_32(&p, 0); /* snaps len */
1527         }
1528
1529         ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
1530
1531         BUG_ON(p > end);
1532         msg->front.iov_len = p - msg->front.iov_base;
1533         msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
1534         msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
1535         msg->hdr.data_len = cpu_to_le32(data_len);
1536         /*
1537          * The header "data_off" is a hint to the receiver allowing it
1538          * to align received data into its buffers such that there's no
1539          * need to re-copy it before writing it to disk (direct I/O).
1540          */
1541         msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
1542
1543         dout("%s req %p oid %*pE oid_len %d front %zu data %u\n", __func__,
1544              req, req->r_t.target_oid.name_len, req->r_t.target_oid.name,
1545              req->r_t.target_oid.name_len, msg->front.iov_len, data_len);
1546 }
1547
1548 /*
1549  * @req has to be assigned a tid and registered.
1550  */
1551 static void send_request(struct ceph_osd_request *req)
1552 {
1553         struct ceph_osd *osd = req->r_osd;
1554
1555         verify_osd_locked(osd);
1556         WARN_ON(osd->o_osd != req->r_t.osd);
1557
1558         /*
1559          * We may have a previously queued request message hanging
1560          * around.  Cancel it to avoid corrupting the msgr.
1561          */
1562         if (req->r_sent)
1563                 ceph_msg_revoke(req->r_request);
1564
1565         req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
1566         if (req->r_attempts)
1567                 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1568         else
1569                 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
1570
1571         encode_request(req, req->r_request);
1572
1573         dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n",
1574              __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
1575              req->r_t.osd, req->r_flags, req->r_attempts);
1576
1577         req->r_t.paused = false;
1578         req->r_stamp = jiffies;
1579         req->r_attempts++;
1580
1581         req->r_sent = osd->o_incarnation;
1582         req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1583         ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
1584 }
1585
1586 static void maybe_request_map(struct ceph_osd_client *osdc)
1587 {
1588         bool continuous = false;
1589
1590         verify_osdc_locked(osdc);
1591         WARN_ON(!osdc->osdmap->epoch);
1592
1593         if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1594             ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
1595             ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) {
1596                 dout("%s osdc %p continuous\n", __func__, osdc);
1597                 continuous = true;
1598         } else {
1599                 dout("%s osdc %p onetime\n", __func__, osdc);
1600         }
1601
1602         if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
1603                                osdc->osdmap->epoch + 1, continuous))
1604                 ceph_monc_renew_subs(&osdc->client->monc);
1605 }
1606
1607 static void send_map_check(struct ceph_osd_request *req);
1608
1609 static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
1610 {
1611         struct ceph_osd_client *osdc = req->r_osdc;
1612         struct ceph_osd *osd;
1613         enum calc_target_result ct_res;
1614         bool need_send = false;
1615         bool promoted = false;
1616
1617         WARN_ON(req->r_tid || req->r_got_reply);
1618         dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
1619
1620 again:
1621         ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false);
1622         if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
1623                 goto promote;
1624
1625         osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
1626         if (IS_ERR(osd)) {
1627                 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
1628                 goto promote;
1629         }
1630
1631         if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1632             ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) {
1633                 dout("req %p pausewr\n", req);
1634                 req->r_t.paused = true;
1635                 maybe_request_map(osdc);
1636         } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1637                    ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD)) {
1638                 dout("req %p pauserd\n", req);
1639                 req->r_t.paused = true;
1640                 maybe_request_map(osdc);
1641         } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1642                    !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
1643                                      CEPH_OSD_FLAG_FULL_FORCE)) &&
1644                    (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1645                     pool_full(osdc, req->r_t.base_oloc.pool))) {
1646                 dout("req %p full/pool_full\n", req);
1647                 pr_warn_ratelimited("FULL or reached pool quota\n");
1648                 req->r_t.paused = true;
1649                 maybe_request_map(osdc);
1650         } else if (!osd_homeless(osd)) {
1651                 need_send = true;
1652         } else {
1653                 maybe_request_map(osdc);
1654         }
1655
1656         mutex_lock(&osd->lock);
1657         /*
1658          * Assign the tid atomically with send_request() to protect
1659          * multiple writes to the same object from racing with each
1660          * other, resulting in out of order ops on the OSDs.
1661          */
1662         req->r_tid = atomic64_inc_return(&osdc->last_tid);
1663         link_request(osd, req);
1664         if (need_send)
1665                 send_request(req);
1666         mutex_unlock(&osd->lock);
1667
1668         if (ct_res == CALC_TARGET_POOL_DNE)
1669                 send_map_check(req);
1670
1671         if (promoted)
1672                 downgrade_write(&osdc->lock);
1673         return;
1674
1675 promote:
1676         up_read(&osdc->lock);
1677         down_write(&osdc->lock);
1678         wrlocked = true;
1679         promoted = true;
1680         goto again;
1681 }
1682
1683 static void account_request(struct ceph_osd_request *req)
1684 {
1685         unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK;
1686
1687         if (req->r_flags & CEPH_OSD_FLAG_READ) {
1688                 WARN_ON(req->r_flags & mask);
1689                 req->r_flags |= CEPH_OSD_FLAG_ACK;
1690         } else if (req->r_flags & CEPH_OSD_FLAG_WRITE)
1691                 WARN_ON(!(req->r_flags & mask));
1692         else
1693                 WARN_ON(1);
1694
1695         WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask);
1696         atomic_inc(&req->r_osdc->num_requests);
1697 }
1698
1699 static void submit_request(struct ceph_osd_request *req, bool wrlocked)
1700 {
1701         ceph_osdc_get_request(req);
1702         account_request(req);
1703         __submit_request(req, wrlocked);
1704 }
1705
1706 static void __finish_request(struct ceph_osd_request *req)
1707 {
1708         struct ceph_osd_client *osdc = req->r_osdc;
1709         struct ceph_osd *osd = req->r_osd;
1710
1711         verify_osd_locked(osd);
1712         dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
1713
1714         WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
1715         unlink_request(osd, req);
1716         atomic_dec(&osdc->num_requests);
1717
1718         /*
1719          * If an OSD has failed or returned and a request has been sent
1720          * twice, it's possible to get a reply and end up here while the
1721          * request message is queued for delivery.  We will ignore the
1722          * reply, so not a big deal, but better to try and catch it.
1723          */
1724         ceph_msg_revoke(req->r_request);
1725         ceph_msg_revoke_incoming(req->r_reply);
1726 }
1727
1728 static void finish_request(struct ceph_osd_request *req)
1729 {
1730         __finish_request(req);
1731         ceph_osdc_put_request(req);
1732 }
1733
1734 static void __complete_request(struct ceph_osd_request *req)
1735 {
1736         if (req->r_callback)
1737                 req->r_callback(req);
1738         else
1739                 complete_all(&req->r_completion);
1740 }
1741
1742 /*
1743  * Note that this is open-coded in handle_reply(), which has to deal
1744  * with ack vs commit, dup acks, etc.
1745  */
1746 static void complete_request(struct ceph_osd_request *req, int err)
1747 {
1748         dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
1749
1750         req->r_result = err;
1751         __finish_request(req);
1752         __complete_request(req);
1753         complete_all(&req->r_safe_completion);
1754         ceph_osdc_put_request(req);
1755 }
1756
1757 static void cancel_map_check(struct ceph_osd_request *req)
1758 {
1759         struct ceph_osd_client *osdc = req->r_osdc;
1760         struct ceph_osd_request *lookup_req;
1761
1762         verify_osdc_wrlocked(osdc);
1763
1764         lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
1765         if (!lookup_req)
1766                 return;
1767
1768         WARN_ON(lookup_req != req);
1769         erase_request_mc(&osdc->map_checks, req);
1770         ceph_osdc_put_request(req);
1771 }
1772
1773 static void cancel_request(struct ceph_osd_request *req)
1774 {
1775         dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
1776
1777         cancel_map_check(req);
1778         finish_request(req);
1779 }
1780
1781 static void check_pool_dne(struct ceph_osd_request *req)
1782 {
1783         struct ceph_osd_client *osdc = req->r_osdc;
1784         struct ceph_osdmap *map = osdc->osdmap;
1785
1786         verify_osdc_wrlocked(osdc);
1787         WARN_ON(!map->epoch);
1788
1789         if (req->r_attempts) {
1790                 /*
1791                  * We sent a request earlier, which means that
1792                  * previously the pool existed, and now it does not
1793                  * (i.e., it was deleted).
1794                  */
1795                 req->r_map_dne_bound = map->epoch;
1796                 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
1797                      req->r_tid);
1798         } else {
1799                 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
1800                      req, req->r_tid, req->r_map_dne_bound, map->epoch);
1801         }
1802
1803         if (req->r_map_dne_bound) {
1804                 if (map->epoch >= req->r_map_dne_bound) {
1805                         /* we had a new enough map */
1806                         pr_info_ratelimited("tid %llu pool does not exist\n",
1807                                             req->r_tid);
1808                         complete_request(req, -ENOENT);
1809                 }
1810         } else {
1811                 send_map_check(req);
1812         }
1813 }
1814
1815 static void map_check_cb(struct ceph_mon_generic_request *greq)
1816 {
1817         struct ceph_osd_client *osdc = &greq->monc->client->osdc;
1818         struct ceph_osd_request *req;
1819         u64 tid = greq->private_data;
1820
1821         WARN_ON(greq->result || !greq->u.newest);
1822
1823         down_write(&osdc->lock);
1824         req = lookup_request_mc(&osdc->map_checks, tid);
1825         if (!req) {
1826                 dout("%s tid %llu dne\n", __func__, tid);
1827                 goto out_unlock;
1828         }
1829
1830         dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
1831              req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
1832         if (!req->r_map_dne_bound)
1833                 req->r_map_dne_bound = greq->u.newest;
1834         erase_request_mc(&osdc->map_checks, req);
1835         check_pool_dne(req);
1836
1837         ceph_osdc_put_request(req);
1838 out_unlock:
1839         up_write(&osdc->lock);
1840 }
1841
1842 static void send_map_check(struct ceph_osd_request *req)
1843 {
1844         struct ceph_osd_client *osdc = req->r_osdc;
1845         struct ceph_osd_request *lookup_req;
1846         int ret;
1847
1848         verify_osdc_wrlocked(osdc);
1849
1850         lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
1851         if (lookup_req) {
1852                 WARN_ON(lookup_req != req);
1853                 return;
1854         }
1855
1856         ceph_osdc_get_request(req);
1857         insert_request_mc(&osdc->map_checks, req);
1858         ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
1859                                           map_check_cb, req->r_tid);
1860         WARN_ON(ret);
1861 }
1862
1863 /*
1864  * lingering requests, watch/notify v2 infrastructure
1865  */
1866 static void linger_release(struct kref *kref)
1867 {
1868         struct ceph_osd_linger_request *lreq =
1869             container_of(kref, struct ceph_osd_linger_request, kref);
1870
1871         dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
1872              lreq->reg_req, lreq->ping_req);
1873         WARN_ON(!RB_EMPTY_NODE(&lreq->node));
1874         WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
1875         WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
1876         WARN_ON(!list_empty(&lreq->scan_item));
1877         WARN_ON(!list_empty(&lreq->pending_lworks));
1878         WARN_ON(lreq->osd);
1879
1880         if (lreq->reg_req)
1881                 ceph_osdc_put_request(lreq->reg_req);
1882         if (lreq->ping_req)
1883                 ceph_osdc_put_request(lreq->ping_req);
1884         target_destroy(&lreq->t);
1885         kfree(lreq);
1886 }
1887
1888 static void linger_put(struct ceph_osd_linger_request *lreq)
1889 {
1890         if (lreq)
1891                 kref_put(&lreq->kref, linger_release);
1892 }
1893
1894 static struct ceph_osd_linger_request *
1895 linger_get(struct ceph_osd_linger_request *lreq)
1896 {
1897         kref_get(&lreq->kref);
1898         return lreq;
1899 }
1900
1901 static struct ceph_osd_linger_request *
1902 linger_alloc(struct ceph_osd_client *osdc)
1903 {
1904         struct ceph_osd_linger_request *lreq;
1905
1906         lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
1907         if (!lreq)
1908                 return NULL;
1909
1910         kref_init(&lreq->kref);
1911         mutex_init(&lreq->lock);
1912         RB_CLEAR_NODE(&lreq->node);
1913         RB_CLEAR_NODE(&lreq->osdc_node);
1914         RB_CLEAR_NODE(&lreq->mc_node);
1915         INIT_LIST_HEAD(&lreq->scan_item);
1916         INIT_LIST_HEAD(&lreq->pending_lworks);
1917         init_completion(&lreq->reg_commit_wait);
1918         init_completion(&lreq->notify_finish_wait);
1919
1920         lreq->osdc = osdc;
1921         target_init(&lreq->t);
1922
1923         dout("%s lreq %p\n", __func__, lreq);
1924         return lreq;
1925 }
1926
1927 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
1928 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
1929 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
1930
1931 /*
1932  * Create linger request <-> OSD session relation.
1933  *
1934  * @lreq has to be registered, @osd may be homeless.
1935  */
1936 static void link_linger(struct ceph_osd *osd,
1937                         struct ceph_osd_linger_request *lreq)
1938 {
1939         verify_osd_locked(osd);
1940         WARN_ON(!lreq->linger_id || lreq->osd);
1941         dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
1942              osd->o_osd, lreq, lreq->linger_id);
1943
1944         if (!osd_homeless(osd))
1945                 __remove_osd_from_lru(osd);
1946         else
1947                 atomic_inc(&osd->o_osdc->num_homeless);
1948
1949         get_osd(osd);
1950         insert_linger(&osd->o_linger_requests, lreq);
1951         lreq->osd = osd;
1952 }
1953
1954 static void unlink_linger(struct ceph_osd *osd,
1955                           struct ceph_osd_linger_request *lreq)
1956 {
1957         verify_osd_locked(osd);
1958         WARN_ON(lreq->osd != osd);
1959         dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
1960              osd->o_osd, lreq, lreq->linger_id);
1961
1962         lreq->osd = NULL;
1963         erase_linger(&osd->o_linger_requests, lreq);
1964         put_osd(osd);
1965
1966         if (!osd_homeless(osd))
1967                 maybe_move_osd_to_lru(osd);
1968         else
1969                 atomic_dec(&osd->o_osdc->num_homeless);
1970 }
1971
1972 static bool __linger_registered(struct ceph_osd_linger_request *lreq)
1973 {
1974         verify_osdc_locked(lreq->osdc);
1975
1976         return !RB_EMPTY_NODE(&lreq->osdc_node);
1977 }
1978
1979 static bool linger_registered(struct ceph_osd_linger_request *lreq)
1980 {
1981         struct ceph_osd_client *osdc = lreq->osdc;
1982         bool registered;
1983
1984         down_read(&osdc->lock);
1985         registered = __linger_registered(lreq);
1986         up_read(&osdc->lock);
1987
1988         return registered;
1989 }
1990
1991 static void linger_register(struct ceph_osd_linger_request *lreq)
1992 {
1993         struct ceph_osd_client *osdc = lreq->osdc;
1994
1995         verify_osdc_wrlocked(osdc);
1996         WARN_ON(lreq->linger_id);
1997
1998         linger_get(lreq);
1999         lreq->linger_id = ++osdc->last_linger_id;
2000         insert_linger_osdc(&osdc->linger_requests, lreq);
2001 }
2002
2003 static void linger_unregister(struct ceph_osd_linger_request *lreq)
2004 {
2005         struct ceph_osd_client *osdc = lreq->osdc;
2006
2007         verify_osdc_wrlocked(osdc);
2008
2009         erase_linger_osdc(&osdc->linger_requests, lreq);
2010         linger_put(lreq);
2011 }
2012
2013 static void cancel_linger_request(struct ceph_osd_request *req)
2014 {
2015         struct ceph_osd_linger_request *lreq = req->r_priv;
2016
2017         WARN_ON(!req->r_linger);
2018         cancel_request(req);
2019         linger_put(lreq);
2020 }
2021
2022 struct linger_work {
2023         struct work_struct work;
2024         struct ceph_osd_linger_request *lreq;
2025         struct list_head pending_item;
2026         unsigned long queued_stamp;
2027
2028         union {
2029                 struct {
2030                         u64 notify_id;
2031                         u64 notifier_id;
2032                         void *payload; /* points into @msg front */
2033                         size_t payload_len;
2034
2035                         struct ceph_msg *msg; /* for ceph_msg_put() */
2036                 } notify;
2037                 struct {
2038                         int err;
2039                 } error;
2040         };
2041 };
2042
2043 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2044                                        work_func_t workfn)
2045 {
2046         struct linger_work *lwork;
2047
2048         lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2049         if (!lwork)
2050                 return NULL;
2051
2052         INIT_WORK(&lwork->work, workfn);
2053         INIT_LIST_HEAD(&lwork->pending_item);
2054         lwork->lreq = linger_get(lreq);
2055
2056         return lwork;
2057 }
2058
2059 static void lwork_free(struct linger_work *lwork)
2060 {
2061         struct ceph_osd_linger_request *lreq = lwork->lreq;
2062
2063         mutex_lock(&lreq->lock);
2064         list_del(&lwork->pending_item);
2065         mutex_unlock(&lreq->lock);
2066
2067         linger_put(lreq);
2068         kfree(lwork);
2069 }
2070
2071 static void lwork_queue(struct linger_work *lwork)
2072 {
2073         struct ceph_osd_linger_request *lreq = lwork->lreq;
2074         struct ceph_osd_client *osdc = lreq->osdc;
2075
2076         verify_lreq_locked(lreq);
2077         WARN_ON(!list_empty(&lwork->pending_item));
2078
2079         lwork->queued_stamp = jiffies;
2080         list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2081         queue_work(osdc->notify_wq, &lwork->work);
2082 }
2083
2084 static void do_watch_notify(struct work_struct *w)
2085 {
2086         struct linger_work *lwork = container_of(w, struct linger_work, work);
2087         struct ceph_osd_linger_request *lreq = lwork->lreq;
2088
2089         if (!linger_registered(lreq)) {
2090                 dout("%s lreq %p not registered\n", __func__, lreq);
2091                 goto out;
2092         }
2093
2094         WARN_ON(!lreq->is_watch);
2095         dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2096              __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2097              lwork->notify.payload_len);
2098         lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2099                   lwork->notify.notifier_id, lwork->notify.payload,
2100                   lwork->notify.payload_len);
2101
2102 out:
2103         ceph_msg_put(lwork->notify.msg);
2104         lwork_free(lwork);
2105 }
2106
2107 static void do_watch_error(struct work_struct *w)
2108 {
2109         struct linger_work *lwork = container_of(w, struct linger_work, work);
2110         struct ceph_osd_linger_request *lreq = lwork->lreq;
2111
2112         if (!linger_registered(lreq)) {
2113                 dout("%s lreq %p not registered\n", __func__, lreq);
2114                 goto out;
2115         }
2116
2117         dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2118         lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2119
2120 out:
2121         lwork_free(lwork);
2122 }
2123
2124 static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2125 {
2126         struct linger_work *lwork;
2127
2128         lwork = lwork_alloc(lreq, do_watch_error);
2129         if (!lwork) {
2130                 pr_err("failed to allocate error-lwork\n");
2131                 return;
2132         }
2133
2134         lwork->error.err = lreq->last_error;
2135         lwork_queue(lwork);
2136 }
2137
2138 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2139                                        int result)
2140 {
2141         if (!completion_done(&lreq->reg_commit_wait)) {
2142                 lreq->reg_commit_error = (result <= 0 ? result : 0);
2143                 complete_all(&lreq->reg_commit_wait);
2144         }
2145 }
2146
2147 static void linger_commit_cb(struct ceph_osd_request *req)
2148 {
2149         struct ceph_osd_linger_request *lreq = req->r_priv;
2150
2151         mutex_lock(&lreq->lock);
2152         dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2153              lreq->linger_id, req->r_result);
2154         WARN_ON(!__linger_registered(lreq));
2155         linger_reg_commit_complete(lreq, req->r_result);
2156         lreq->committed = true;
2157
2158         if (!lreq->is_watch) {
2159                 struct ceph_osd_data *osd_data =
2160                     osd_req_op_data(req, 0, notify, response_data);
2161                 void *p = page_address(osd_data->pages[0]);
2162
2163                 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2164                         osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2165
2166                 /* make note of the notify_id */
2167                 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2168                         lreq->notify_id = ceph_decode_64(&p);
2169                         dout("lreq %p notify_id %llu\n", lreq,
2170                              lreq->notify_id);
2171                 } else {
2172                         dout("lreq %p no notify_id\n", lreq);
2173                 }
2174         }
2175
2176         mutex_unlock(&lreq->lock);
2177         linger_put(lreq);
2178 }
2179
2180 static int normalize_watch_error(int err)
2181 {
2182         /*
2183          * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2184          * notification and a failure to reconnect because we raced with
2185          * the delete appear the same to the user.
2186          */
2187         if (err == -ENOENT)
2188                 err = -ENOTCONN;
2189
2190         return err;
2191 }
2192
2193 static void linger_reconnect_cb(struct ceph_osd_request *req)
2194 {
2195         struct ceph_osd_linger_request *lreq = req->r_priv;
2196
2197         mutex_lock(&lreq->lock);
2198         dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2199              lreq, lreq->linger_id, req->r_result, lreq->last_error);
2200         if (req->r_result < 0) {
2201                 if (!lreq->last_error) {
2202                         lreq->last_error = normalize_watch_error(req->r_result);
2203                         queue_watch_error(lreq);
2204                 }
2205         }
2206
2207         mutex_unlock(&lreq->lock);
2208         linger_put(lreq);
2209 }
2210
2211 static void send_linger(struct ceph_osd_linger_request *lreq)
2212 {
2213         struct ceph_osd_request *req = lreq->reg_req;
2214         struct ceph_osd_req_op *op = &req->r_ops[0];
2215
2216         verify_osdc_wrlocked(req->r_osdc);
2217         dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2218
2219         if (req->r_osd)
2220                 cancel_linger_request(req);
2221
2222         request_reinit(req);
2223         ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2224         ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2225         req->r_flags = lreq->t.flags;
2226         req->r_mtime = lreq->mtime;
2227
2228         mutex_lock(&lreq->lock);
2229         if (lreq->is_watch && lreq->committed) {
2230                 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2231                         op->watch.cookie != lreq->linger_id);
2232                 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2233                 op->watch.gen = ++lreq->register_gen;
2234                 dout("lreq %p reconnect register_gen %u\n", lreq,
2235                      op->watch.gen);
2236                 req->r_callback = linger_reconnect_cb;
2237         } else {
2238                 if (!lreq->is_watch)
2239                         lreq->notify_id = 0;
2240                 else
2241                         WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
2242                 dout("lreq %p register\n", lreq);
2243                 req->r_callback = linger_commit_cb;
2244         }
2245         mutex_unlock(&lreq->lock);
2246
2247         req->r_priv = linger_get(lreq);
2248         req->r_linger = true;
2249
2250         submit_request(req, true);
2251 }
2252
2253 static void linger_ping_cb(struct ceph_osd_request *req)
2254 {
2255         struct ceph_osd_linger_request *lreq = req->r_priv;
2256
2257         mutex_lock(&lreq->lock);
2258         dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
2259              __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
2260              lreq->last_error);
2261         if (lreq->register_gen == req->r_ops[0].watch.gen) {
2262                 if (!req->r_result) {
2263                         lreq->watch_valid_thru = lreq->ping_sent;
2264                 } else if (!lreq->last_error) {
2265                         lreq->last_error = normalize_watch_error(req->r_result);
2266                         queue_watch_error(lreq);
2267                 }
2268         } else {
2269                 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
2270                      lreq->register_gen, req->r_ops[0].watch.gen);
2271         }
2272
2273         mutex_unlock(&lreq->lock);
2274         linger_put(lreq);
2275 }
2276
2277 static void send_linger_ping(struct ceph_osd_linger_request *lreq)
2278 {
2279         struct ceph_osd_client *osdc = lreq->osdc;
2280         struct ceph_osd_request *req = lreq->ping_req;
2281         struct ceph_osd_req_op *op = &req->r_ops[0];
2282
2283         if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD)) {
2284                 dout("%s PAUSERD\n", __func__);
2285                 return;
2286         }
2287
2288         lreq->ping_sent = jiffies;
2289         dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
2290              __func__, lreq, lreq->linger_id, lreq->ping_sent,
2291              lreq->register_gen);
2292
2293         if (req->r_osd)
2294                 cancel_linger_request(req);
2295
2296         request_reinit(req);
2297         target_copy(&req->r_t, &lreq->t);
2298
2299         WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2300                 op->watch.cookie != lreq->linger_id ||
2301                 op->watch.op != CEPH_OSD_WATCH_OP_PING);
2302         op->watch.gen = lreq->register_gen;
2303         req->r_callback = linger_ping_cb;
2304         req->r_priv = linger_get(lreq);
2305         req->r_linger = true;
2306
2307         ceph_osdc_get_request(req);
2308         account_request(req);
2309         req->r_tid = atomic64_inc_return(&osdc->last_tid);
2310         link_request(lreq->osd, req);
2311         send_request(req);
2312 }
2313
2314 static void linger_submit(struct ceph_osd_linger_request *lreq)
2315 {
2316         struct ceph_osd_client *osdc = lreq->osdc;
2317         struct ceph_osd *osd;
2318
2319         calc_target(osdc, &lreq->t, &lreq->last_force_resend, false);
2320         osd = lookup_create_osd(osdc, lreq->t.osd, true);
2321         link_linger(osd, lreq);
2322
2323         send_linger(lreq);
2324 }
2325
2326 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
2327 {
2328         struct ceph_osd_client *osdc = lreq->osdc;
2329         struct ceph_osd_linger_request *lookup_lreq;
2330
2331         verify_osdc_wrlocked(osdc);
2332
2333         lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2334                                        lreq->linger_id);
2335         if (!lookup_lreq)
2336                 return;
2337
2338         WARN_ON(lookup_lreq != lreq);
2339         erase_linger_mc(&osdc->linger_map_checks, lreq);
2340         linger_put(lreq);
2341 }
2342
2343 /*
2344  * @lreq has to be both registered and linked.
2345  */
2346 static void __linger_cancel(struct ceph_osd_linger_request *lreq)
2347 {
2348         if (lreq->is_watch && lreq->ping_req->r_osd)
2349                 cancel_linger_request(lreq->ping_req);
2350         if (lreq->reg_req->r_osd)
2351                 cancel_linger_request(lreq->reg_req);
2352         cancel_linger_map_check(lreq);
2353         unlink_linger(lreq->osd, lreq);
2354         linger_unregister(lreq);
2355 }
2356
2357 static void linger_cancel(struct ceph_osd_linger_request *lreq)
2358 {
2359         struct ceph_osd_client *osdc = lreq->osdc;
2360
2361         down_write(&osdc->lock);
2362         if (__linger_registered(lreq))
2363                 __linger_cancel(lreq);
2364         up_write(&osdc->lock);
2365 }
2366
2367 static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
2368
2369 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
2370 {
2371         struct ceph_osd_client *osdc = lreq->osdc;
2372         struct ceph_osdmap *map = osdc->osdmap;
2373
2374         verify_osdc_wrlocked(osdc);
2375         WARN_ON(!map->epoch);
2376
2377         if (lreq->register_gen) {
2378                 lreq->map_dne_bound = map->epoch;
2379                 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
2380                      lreq, lreq->linger_id);
2381         } else {
2382                 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
2383                      __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2384                      map->epoch);
2385         }
2386
2387         if (lreq->map_dne_bound) {
2388                 if (map->epoch >= lreq->map_dne_bound) {
2389                         /* we had a new enough map */
2390                         pr_info("linger_id %llu pool does not exist\n",
2391                                 lreq->linger_id);
2392                         linger_reg_commit_complete(lreq, -ENOENT);
2393                         __linger_cancel(lreq);
2394                 }
2395         } else {
2396                 send_linger_map_check(lreq);
2397         }
2398 }
2399
2400 static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
2401 {
2402         struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2403         struct ceph_osd_linger_request *lreq;
2404         u64 linger_id = greq->private_data;
2405
2406         WARN_ON(greq->result || !greq->u.newest);
2407
2408         down_write(&osdc->lock);
2409         lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
2410         if (!lreq) {
2411                 dout("%s linger_id %llu dne\n", __func__, linger_id);
2412                 goto out_unlock;
2413         }
2414
2415         dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
2416              __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2417              greq->u.newest);
2418         if (!lreq->map_dne_bound)
2419                 lreq->map_dne_bound = greq->u.newest;
2420         erase_linger_mc(&osdc->linger_map_checks, lreq);
2421         check_linger_pool_dne(lreq);
2422
2423         linger_put(lreq);
2424 out_unlock:
2425         up_write(&osdc->lock);
2426 }
2427
2428 static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
2429 {
2430         struct ceph_osd_client *osdc = lreq->osdc;
2431         struct ceph_osd_linger_request *lookup_lreq;
2432         int ret;
2433
2434         verify_osdc_wrlocked(osdc);
2435
2436         lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2437                                        lreq->linger_id);
2438         if (lookup_lreq) {
2439                 WARN_ON(lookup_lreq != lreq);
2440                 return;
2441         }
2442
2443         linger_get(lreq);
2444         insert_linger_mc(&osdc->linger_map_checks, lreq);
2445         ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2446                                           linger_map_check_cb, lreq->linger_id);
2447         WARN_ON(ret);
2448 }
2449
2450 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
2451 {
2452         int ret;
2453
2454         dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2455         ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
2456         return ret ?: lreq->reg_commit_error;
2457 }
2458
2459 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
2460 {
2461         int ret;
2462
2463         dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2464         ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
2465         return ret ?: lreq->notify_finish_error;
2466 }
2467
2468 /*
2469  * Timeout callback, called every N seconds.  When 1 or more OSD
2470  * requests has been active for more than N seconds, we send a keepalive
2471  * (tag + timestamp) to its OSD to ensure any communications channel
2472  * reset is detected.
2473  */
2474 static void handle_timeout(struct work_struct *work)
2475 {
2476         struct ceph_osd_client *osdc =
2477                 container_of(work, struct ceph_osd_client, timeout_work.work);
2478         struct ceph_options *opts = osdc->client->options;
2479         unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
2480         LIST_HEAD(slow_osds);
2481         struct rb_node *n, *p;
2482
2483         dout("%s osdc %p\n", __func__, osdc);
2484         down_write(&osdc->lock);
2485
2486         /*
2487          * ping osds that are a bit slow.  this ensures that if there
2488          * is a break in the TCP connection we will notice, and reopen
2489          * a connection with that osd (from the fault callback).
2490          */
2491         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2492                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2493                 bool found = false;
2494
2495                 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
2496                         struct ceph_osd_request *req =
2497                             rb_entry(p, struct ceph_osd_request, r_node);
2498
2499                         if (time_before(req->r_stamp, cutoff)) {
2500                                 dout(" req %p tid %llu on osd%d is laggy\n",
2501                                      req, req->r_tid, osd->o_osd);
2502                                 found = true;
2503                         }
2504                 }
2505                 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
2506                         struct ceph_osd_linger_request *lreq =
2507                             rb_entry(p, struct ceph_osd_linger_request, node);
2508
2509                         dout(" lreq %p linger_id %llu is served by osd%d\n",
2510                              lreq, lreq->linger_id, osd->o_osd);
2511                         found = true;
2512
2513                         mutex_lock(&lreq->lock);
2514                         if (lreq->is_watch && lreq->committed && !lreq->last_error)
2515                                 send_linger_ping(lreq);
2516                         mutex_unlock(&lreq->lock);
2517                 }
2518
2519                 if (found)
2520                         list_move_tail(&osd->o_keepalive_item, &slow_osds);
2521         }
2522
2523         if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
2524                 maybe_request_map(osdc);
2525
2526         while (!list_empty(&slow_osds)) {
2527                 struct ceph_osd *osd = list_first_entry(&slow_osds,
2528                                                         struct ceph_osd,
2529                                                         o_keepalive_item);
2530                 list_del_init(&osd->o_keepalive_item);
2531                 ceph_con_keepalive(&osd->o_con);
2532         }
2533
2534         up_write(&osdc->lock);
2535         schedule_delayed_work(&osdc->timeout_work,
2536                               osdc->client->options->osd_keepalive_timeout);
2537 }
2538
2539 static void handle_osds_timeout(struct work_struct *work)
2540 {
2541         struct ceph_osd_client *osdc =
2542                 container_of(work, struct ceph_osd_client,
2543                              osds_timeout_work.work);
2544         unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
2545         struct ceph_osd *osd, *nosd;
2546
2547         dout("%s osdc %p\n", __func__, osdc);
2548         down_write(&osdc->lock);
2549         list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
2550                 if (time_before(jiffies, osd->lru_ttl))
2551                         break;
2552
2553                 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
2554                 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
2555                 close_osd(osd);
2556         }
2557
2558         up_write(&osdc->lock);
2559         schedule_delayed_work(&osdc->osds_timeout_work,
2560                               round_jiffies_relative(delay));
2561 }
2562
2563 static int ceph_oloc_decode(void **p, void *end,
2564                             struct ceph_object_locator *oloc)
2565 {
2566         u8 struct_v, struct_cv;
2567         u32 len;
2568         void *struct_end;
2569         int ret = 0;
2570
2571         ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
2572         struct_v = ceph_decode_8(p);
2573         struct_cv = ceph_decode_8(p);
2574         if (struct_v < 3) {
2575                 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
2576                         struct_v, struct_cv);
2577                 goto e_inval;
2578         }
2579         if (struct_cv > 6) {
2580                 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
2581                         struct_v, struct_cv);
2582                 goto e_inval;
2583         }
2584         len = ceph_decode_32(p);
2585         ceph_decode_need(p, end, len, e_inval);
2586         struct_end = *p + len;
2587
2588         oloc->pool = ceph_decode_64(p);
2589         *p += 4; /* skip preferred */
2590
2591         len = ceph_decode_32(p);
2592         if (len > 0) {
2593                 pr_warn("ceph_object_locator::key is set\n");
2594                 goto e_inval;
2595         }
2596
2597         if (struct_v >= 5) {
2598                 len = ceph_decode_32(p);
2599                 if (len > 0) {
2600                         pr_warn("ceph_object_locator::nspace is set\n");
2601                         goto e_inval;
2602                 }
2603         }
2604
2605         if (struct_v >= 6) {
2606                 s64 hash = ceph_decode_64(p);
2607                 if (hash != -1) {
2608                         pr_warn("ceph_object_locator::hash is set\n");
2609                         goto e_inval;
2610                 }
2611         }
2612
2613         /* skip the rest */
2614         *p = struct_end;
2615 out:
2616         return ret;
2617
2618 e_inval:
2619         ret = -EINVAL;
2620         goto out;
2621 }
2622
2623 static int ceph_redirect_decode(void **p, void *end,
2624                                 struct ceph_request_redirect *redir)
2625 {
2626         u8 struct_v, struct_cv;
2627         u32 len;
2628         void *struct_end;
2629         int ret;
2630
2631         ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
2632         struct_v = ceph_decode_8(p);
2633         struct_cv = ceph_decode_8(p);
2634         if (struct_cv > 1) {
2635                 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
2636                         struct_v, struct_cv);
2637                 goto e_inval;
2638         }
2639         len = ceph_decode_32(p);
2640         ceph_decode_need(p, end, len, e_inval);
2641         struct_end = *p + len;
2642
2643         ret = ceph_oloc_decode(p, end, &redir->oloc);
2644         if (ret)
2645                 goto out;
2646
2647         len = ceph_decode_32(p);
2648         if (len > 0) {
2649                 pr_warn("ceph_request_redirect::object_name is set\n");
2650                 goto e_inval;
2651         }
2652
2653         len = ceph_decode_32(p);
2654         *p += len; /* skip osd_instructions */
2655
2656         /* skip the rest */
2657         *p = struct_end;
2658 out:
2659         return ret;
2660
2661 e_inval:
2662         ret = -EINVAL;
2663         goto out;
2664 }
2665
2666 struct MOSDOpReply {
2667         struct ceph_pg pgid;
2668         u64 flags;
2669         int result;
2670         u32 epoch;
2671         int num_ops;
2672         u32 outdata_len[CEPH_OSD_MAX_OPS];
2673         s32 rval[CEPH_OSD_MAX_OPS];
2674         int retry_attempt;
2675         struct ceph_eversion replay_version;
2676         u64 user_version;
2677         struct ceph_request_redirect redirect;
2678 };
2679
2680 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
2681 {
2682         void *p = msg->front.iov_base;
2683         void *const end = p + msg->front.iov_len;
2684         u16 version = le16_to_cpu(msg->hdr.version);
2685         struct ceph_eversion bad_replay_version;
2686         u8 decode_redir;
2687         u32 len;
2688         int ret;
2689         int i;
2690
2691         ceph_decode_32_safe(&p, end, len, e_inval);
2692         ceph_decode_need(&p, end, len, e_inval);
2693         p += len; /* skip oid */
2694
2695         ret = ceph_decode_pgid(&p, end, &m->pgid);
2696         if (ret)
2697                 return ret;
2698
2699         ceph_decode_64_safe(&p, end, m->flags, e_inval);
2700         ceph_decode_32_safe(&p, end, m->result, e_inval);
2701         ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
2702         memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
2703         p += sizeof(bad_replay_version);
2704         ceph_decode_32_safe(&p, end, m->epoch, e_inval);
2705
2706         ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
2707         if (m->num_ops > ARRAY_SIZE(m->outdata_len))
2708                 goto e_inval;
2709
2710         ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
2711                          e_inval);
2712         for (i = 0; i < m->num_ops; i++) {
2713                 struct ceph_osd_op *op = p;
2714
2715                 m->outdata_len[i] = le32_to_cpu(op->payload_len);
2716                 p += sizeof(*op);
2717         }
2718
2719         ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
2720         for (i = 0; i < m->num_ops; i++)
2721                 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
2722
2723         if (version >= 5) {
2724                 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
2725                 memcpy(&m->replay_version, p, sizeof(m->replay_version));
2726                 p += sizeof(m->replay_version);
2727                 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
2728         } else {
2729                 m->replay_version = bad_replay_version; /* struct */
2730                 m->user_version = le64_to_cpu(m->replay_version.version);
2731         }
2732
2733         if (version >= 6) {
2734                 if (version >= 7)
2735                         ceph_decode_8_safe(&p, end, decode_redir, e_inval);
2736                 else
2737                         decode_redir = 1;
2738         } else {
2739                 decode_redir = 0;
2740         }
2741
2742         if (decode_redir) {
2743                 ret = ceph_redirect_decode(&p, end, &m->redirect);
2744                 if (ret)
2745                         return ret;
2746         } else {
2747                 ceph_oloc_init(&m->redirect.oloc);
2748         }
2749
2750         return 0;
2751
2752 e_inval:
2753         return -EINVAL;
2754 }
2755
2756 /*
2757  * We are done with @req if
2758  *   - @m is a safe reply, or
2759  *   - @m is an unsafe reply and we didn't want a safe one
2760  */
2761 static bool done_request(const struct ceph_osd_request *req,
2762                          const struct MOSDOpReply *m)
2763 {
2764         return (m->result < 0 ||
2765                 (m->flags & CEPH_OSD_FLAG_ONDISK) ||
2766                 !(req->r_flags & CEPH_OSD_FLAG_ONDISK));
2767 }
2768
2769 /*
2770  * handle osd op reply.  either call the callback if it is specified,
2771  * or do the completion to wake up the waiting thread.
2772  *
2773  * ->r_unsafe_callback is set?  yes                     no
2774  *
2775  * first reply is OK (needed    r_cb/r_completion,      r_cb/r_completion,
2776  * any or needed/got safe)      r_safe_completion       r_safe_completion
2777  *
2778  * first reply is unsafe        r_unsafe_cb(true)       (nothing)
2779  *
2780  * when we get the safe reply   r_unsafe_cb(false),     r_cb/r_completion,
2781  *                              r_safe_completion       r_safe_completion
2782  */
2783 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
2784 {
2785         struct ceph_osd_client *osdc = osd->o_osdc;
2786         struct ceph_osd_request *req;
2787         struct MOSDOpReply m;
2788         u64 tid = le64_to_cpu(msg->hdr.tid);
2789         u32 data_len = 0;
2790         bool already_acked;
2791         int ret;
2792         int i;
2793
2794         dout("%s msg %p tid %llu\n", __func__, msg, tid);
2795
2796         down_read(&osdc->lock);
2797         if (!osd_registered(osd)) {
2798                 dout("%s osd%d unknown\n", __func__, osd->o_osd);
2799                 goto out_unlock_osdc;
2800         }
2801         WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
2802
2803         mutex_lock(&osd->lock);
2804         req = lookup_request(&osd->o_requests, tid);
2805         if (!req) {
2806                 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
2807                 goto out_unlock_session;
2808         }
2809
2810         ret = decode_MOSDOpReply(msg, &m);
2811         if (ret) {
2812                 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
2813                        req->r_tid, ret);
2814                 ceph_msg_dump(msg);
2815                 goto fail_request;
2816         }
2817         dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
2818              __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
2819              m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
2820              le64_to_cpu(m.replay_version.version), m.user_version);
2821
2822         if (m.retry_attempt >= 0) {
2823                 if (m.retry_attempt != req->r_attempts - 1) {
2824                         dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
2825                              req, req->r_tid, m.retry_attempt,
2826                              req->r_attempts - 1);
2827                         goto out_unlock_session;
2828                 }
2829         } else {
2830                 WARN_ON(1); /* MOSDOpReply v4 is assumed */
2831         }
2832
2833         if (!ceph_oloc_empty(&m.redirect.oloc)) {
2834                 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
2835                      m.redirect.oloc.pool);
2836                 unlink_request(osd, req);
2837                 mutex_unlock(&osd->lock);
2838
2839                 ceph_oloc_copy(&req->r_t.target_oloc, &m.redirect.oloc);
2840                 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
2841                 req->r_tid = 0;
2842                 __submit_request(req, false);
2843                 goto out_unlock_osdc;
2844         }
2845
2846         if (m.num_ops != req->r_num_ops) {
2847                 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
2848                        req->r_num_ops, req->r_tid);
2849                 goto fail_request;
2850         }
2851         for (i = 0; i < req->r_num_ops; i++) {
2852                 dout(" req %p tid %llu op %d rval %d len %u\n", req,
2853                      req->r_tid, i, m.rval[i], m.outdata_len[i]);
2854                 req->r_ops[i].rval = m.rval[i];
2855                 req->r_ops[i].outdata_len = m.outdata_len[i];
2856                 data_len += m.outdata_len[i];
2857         }
2858         if (data_len != le32_to_cpu(msg->hdr.data_len)) {
2859                 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
2860                        le32_to_cpu(msg->hdr.data_len), req->r_tid);
2861                 goto fail_request;
2862         }
2863         dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
2864              req, req->r_tid, req->r_got_reply, m.result, data_len);
2865
2866         already_acked = req->r_got_reply;
2867         if (!already_acked) {
2868                 req->r_result = m.result ?: data_len;
2869                 req->r_replay_version = m.replay_version; /* struct */
2870                 req->r_got_reply = true;
2871         } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
2872                 dout("req %p tid %llu dup ack\n", req, req->r_tid);
2873                 goto out_unlock_session;
2874         }
2875
2876         if (done_request(req, &m)) {
2877                 __finish_request(req);
2878                 if (req->r_linger) {
2879                         WARN_ON(req->r_unsafe_callback);
2880                         dout("req %p tid %llu cb (locked)\n", req, req->r_tid);
2881                         __complete_request(req);
2882                 }
2883         }
2884
2885         mutex_unlock(&osd->lock);
2886         up_read(&osdc->lock);
2887
2888         if (done_request(req, &m)) {
2889                 if (already_acked && req->r_unsafe_callback) {
2890                         dout("req %p tid %llu safe-cb\n", req, req->r_tid);
2891                         req->r_unsafe_callback(req, false);
2892                 } else if (!req->r_linger) {
2893                         dout("req %p tid %llu cb\n", req, req->r_tid);
2894                         __complete_request(req);
2895                 }
2896         } else {
2897                 if (req->r_unsafe_callback) {
2898                         dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
2899                         req->r_unsafe_callback(req, true);
2900                 } else {
2901                         WARN_ON(1);
2902                 }
2903         }
2904         if (m.flags & CEPH_OSD_FLAG_ONDISK)
2905                 complete_all(&req->r_safe_completion);
2906
2907         ceph_osdc_put_request(req);
2908         return;
2909
2910 fail_request:
2911         complete_request(req, -EIO);
2912 out_unlock_session:
2913         mutex_unlock(&osd->lock);
2914 out_unlock_osdc:
2915         up_read(&osdc->lock);
2916 }
2917
2918 static void set_pool_was_full(struct ceph_osd_client *osdc)
2919 {
2920         struct rb_node *n;
2921
2922         for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
2923                 struct ceph_pg_pool_info *pi =
2924                     rb_entry(n, struct ceph_pg_pool_info, node);
2925
2926                 pi->was_full = __pool_full(pi);
2927         }
2928 }
2929
2930 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
2931 {
2932         struct ceph_pg_pool_info *pi;
2933
2934         pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
2935         if (!pi)
2936                 return false;
2937
2938         return pi->was_full && !__pool_full(pi);
2939 }
2940
2941 static enum calc_target_result
2942 recalc_linger_target(struct ceph_osd_linger_request *lreq)
2943 {
2944         struct ceph_osd_client *osdc = lreq->osdc;
2945         enum calc_target_result ct_res;
2946
2947         ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true);
2948         if (ct_res == CALC_TARGET_NEED_RESEND) {
2949                 struct ceph_osd *osd;
2950
2951                 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2952                 if (osd != lreq->osd) {
2953                         unlink_linger(lreq->osd, lreq);
2954                         link_linger(osd, lreq);
2955                 }
2956         }
2957
2958         return ct_res;
2959 }
2960
2961 /*
2962  * Requeue requests whose mapping to an OSD has changed.
2963  */
2964 static void scan_requests(struct ceph_osd *osd,
2965                           bool force_resend,
2966                           bool cleared_full,
2967                           bool check_pool_cleared_full,
2968                           struct rb_root *need_resend,
2969                           struct list_head *need_resend_linger)
2970 {
2971         struct ceph_osd_client *osdc = osd->o_osdc;
2972         struct rb_node *n;
2973         bool force_resend_writes;
2974
2975         for (n = rb_first(&osd->o_linger_requests); n; ) {
2976                 struct ceph_osd_linger_request *lreq =
2977                     rb_entry(n, struct ceph_osd_linger_request, node);
2978                 enum calc_target_result ct_res;
2979
2980                 n = rb_next(n); /* recalc_linger_target() */
2981
2982                 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
2983                      lreq->linger_id);
2984                 ct_res = recalc_linger_target(lreq);
2985                 switch (ct_res) {
2986                 case CALC_TARGET_NO_ACTION:
2987                         force_resend_writes = cleared_full ||
2988                             (check_pool_cleared_full &&
2989                              pool_cleared_full(osdc, lreq->t.base_oloc.pool));
2990                         if (!force_resend && !force_resend_writes)
2991                                 break;
2992
2993                         /* fall through */
2994                 case CALC_TARGET_NEED_RESEND:
2995                         cancel_linger_map_check(lreq);
2996                         /*
2997                          * scan_requests() for the previous epoch(s)
2998                          * may have already added it to the list, since
2999                          * it's not unlinked here.
3000                          */
3001                         if (list_empty(&lreq->scan_item))
3002                                 list_add_tail(&lreq->scan_item, need_resend_linger);
3003                         break;
3004                 case CALC_TARGET_POOL_DNE:
3005                         check_linger_pool_dne(lreq);
3006                         break;
3007                 }
3008         }
3009
3010         for (n = rb_first(&osd->o_requests); n; ) {
3011                 struct ceph_osd_request *req =
3012                     rb_entry(n, struct ceph_osd_request, r_node);
3013                 enum calc_target_result ct_res;
3014
3015                 n = rb_next(n); /* unlink_request(), check_pool_dne() */
3016
3017                 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3018                 ct_res = calc_target(osdc, &req->r_t,
3019                                      &req->r_last_force_resend, false);
3020                 switch (ct_res) {
3021                 case CALC_TARGET_NO_ACTION:
3022                         force_resend_writes = cleared_full ||
3023                             (check_pool_cleared_full &&
3024                              pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3025                         if (!force_resend &&
3026                             (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3027                              !force_resend_writes))
3028                                 break;
3029
3030                         /* fall through */
3031                 case CALC_TARGET_NEED_RESEND:
3032                         cancel_map_check(req);
3033                         unlink_request(osd, req);
3034                         insert_request(need_resend, req);
3035                         break;
3036                 case CALC_TARGET_POOL_DNE:
3037                         check_pool_dne(req);
3038                         break;
3039                 }
3040         }
3041 }
3042
3043 static int handle_one_map(struct ceph_osd_client *osdc,
3044                           void *p, void *end, bool incremental,
3045                           struct rb_root *need_resend,
3046                           struct list_head *need_resend_linger)
3047 {
3048         struct ceph_osdmap *newmap;
3049         struct rb_node *n;
3050         bool skipped_map = false;
3051         bool was_full;
3052
3053         was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
3054         set_pool_was_full(osdc);
3055
3056         if (incremental)
3057                 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3058         else
3059                 newmap = ceph_osdmap_decode(&p, end);
3060         if (IS_ERR(newmap))
3061                 return PTR_ERR(newmap);
3062
3063         if (newmap != osdc->osdmap) {
3064                 /*
3065                  * Preserve ->was_full before destroying the old map.
3066                  * For pools that weren't in the old map, ->was_full
3067                  * should be false.
3068                  */
3069                 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3070                         struct ceph_pg_pool_info *pi =
3071                             rb_entry(n, struct ceph_pg_pool_info, node);
3072                         struct ceph_pg_pool_info *old_pi;
3073
3074                         old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3075                         if (old_pi)
3076                                 pi->was_full = old_pi->was_full;
3077                         else
3078                                 WARN_ON(pi->was_full);
3079                 }
3080
3081                 if (osdc->osdmap->epoch &&
3082                     osdc->osdmap->epoch + 1 < newmap->epoch) {
3083                         WARN_ON(incremental);
3084                         skipped_map = true;
3085                 }
3086
3087                 ceph_osdmap_destroy(osdc->osdmap);
3088                 osdc->osdmap = newmap;
3089         }
3090
3091         was_full &= !ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
3092         scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3093                       need_resend, need_resend_linger);
3094
3095         for (n = rb_first(&osdc->osds); n; ) {
3096                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3097
3098                 n = rb_next(n); /* close_osd() */
3099
3100                 scan_requests(osd, skipped_map, was_full, true, need_resend,
3101                               need_resend_linger);
3102                 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3103                     memcmp(&osd->o_con.peer_addr,
3104                            ceph_osd_addr(osdc->osdmap, osd->o_osd),
3105                            sizeof(struct ceph_entity_addr)))
3106                         close_osd(osd);
3107         }
3108
3109         return 0;
3110 }
3111
3112 static void kick_requests(struct ceph_osd_client *osdc,
3113                           struct rb_root *need_resend,
3114                           struct list_head *need_resend_linger)
3115 {
3116         struct ceph_osd_linger_request *lreq, *nlreq;
3117         struct rb_node *n;
3118
3119         for (n = rb_first(need_resend); n; ) {
3120                 struct ceph_osd_request *req =
3121                     rb_entry(n, struct ceph_osd_request, r_node);
3122                 struct ceph_osd *osd;
3123
3124                 n = rb_next(n);
3125                 erase_request(need_resend, req); /* before link_request() */
3126
3127                 WARN_ON(req->r_osd);
3128                 calc_target(osdc, &req->r_t, NULL, false);
3129                 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3130                 link_request(osd, req);
3131                 if (!req->r_linger) {
3132                         if (!osd_homeless(osd) && !req->r_t.paused)
3133                                 send_request(req);
3134                 } else {
3135                         cancel_linger_request(req);
3136                 }
3137         }
3138
3139         list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3140                 if (!osd_homeless(lreq->osd))
3141                         send_linger(lreq);
3142
3143                 list_del_init(&lreq->scan_item);
3144         }
3145 }
3146
3147 /*
3148  * Process updated osd map.
3149  *
3150  * The message contains any number of incremental and full maps, normally
3151  * indicating some sort of topology change in the cluster.  Kick requests
3152  * off to different OSDs as needed.
3153  */
3154 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3155 {
3156         void *p = msg->front.iov_base;
3157         void *const end = p + msg->front.iov_len;
3158         u32 nr_maps, maplen;
3159         u32 epoch;
3160         struct ceph_fsid fsid;
3161         struct rb_root need_resend = RB_ROOT;
3162         LIST_HEAD(need_resend_linger);
3163         bool handled_incremental = false;
3164         bool was_pauserd, was_pausewr;
3165         bool pauserd, pausewr;
3166         int err;
3167
3168         dout("%s have %u\n", __func__, osdc->osdmap->epoch);
3169         down_write(&osdc->lock);
3170
3171         /* verify fsid */
3172         ceph_decode_need(&p, end, sizeof(fsid), bad);
3173         ceph_decode_copy(&p, &fsid, sizeof(fsid));
3174         if (ceph_check_fsid(osdc->client, &fsid) < 0)
3175                 goto bad;
3176
3177         was_pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
3178         was_pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
3179                       ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
3180                       have_pool_full(osdc);
3181
3182         /* incremental maps */
3183         ceph_decode_32_safe(&p, end, nr_maps, bad);
3184         dout(" %d inc maps\n", nr_maps);
3185         while (nr_maps > 0) {
3186                 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3187                 epoch = ceph_decode_32(&p);
3188                 maplen = ceph_decode_32(&p);
3189                 ceph_decode_need(&p, end, maplen, bad);
3190                 if (osdc->osdmap->epoch &&
3191                     osdc->osdmap->epoch + 1 == epoch) {
3192                         dout("applying incremental map %u len %d\n",
3193                              epoch, maplen);
3194                         err = handle_one_map(osdc, p, p + maplen, true,
3195                                              &need_resend, &need_resend_linger);
3196                         if (err)
3197                                 goto bad;
3198                         handled_incremental = true;
3199                 } else {
3200                         dout("ignoring incremental map %u len %d\n",
3201                              epoch, maplen);
3202                 }
3203                 p += maplen;
3204                 nr_maps--;
3205         }
3206         if (handled_incremental)
3207                 goto done;
3208
3209         /* full maps */
3210         ceph_decode_32_safe(&p, end, nr_maps, bad);
3211         dout(" %d full maps\n", nr_maps);
3212         while (nr_maps) {
3213                 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3214                 epoch = ceph_decode_32(&p);
3215                 maplen = ceph_decode_32(&p);
3216                 ceph_decode_need(&p, end, maplen, bad);
3217                 if (nr_maps > 1) {
3218                         dout("skipping non-latest full map %u len %d\n",
3219                              epoch, maplen);
3220                 } else if (osdc->osdmap->epoch >= epoch) {
3221                         dout("skipping full map %u len %d, "
3222                              "older than our %u\n", epoch, maplen,
3223                              osdc->osdmap->epoch);
3224                 } else {
3225                         dout("taking full map %u len %d\n", epoch, maplen);
3226                         err = handle_one_map(osdc, p, p + maplen, false,
3227                                              &need_resend, &need_resend_linger);
3228                         if (err)
3229                                 goto bad;
3230                 }
3231                 p += maplen;
3232                 nr_maps--;
3233         }
3234
3235 done:
3236         /*
3237          * subscribe to subsequent osdmap updates if full to ensure
3238          * we find out when we are no longer full and stop returning
3239          * ENOSPC.
3240          */
3241         pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
3242         pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
3243                   ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
3244                   have_pool_full(osdc);
3245         if (was_pauserd || was_pausewr || pauserd || pausewr)
3246                 maybe_request_map(osdc);
3247
3248         kick_requests(osdc, &need_resend, &need_resend_linger);
3249
3250         ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
3251                           osdc->osdmap->epoch);
3252         up_write(&osdc->lock);
3253         wake_up_all(&osdc->client->auth_wq);
3254         return;
3255
3256 bad:
3257         pr_err("osdc handle_map corrupt msg\n");
3258         ceph_msg_dump(msg);
3259         up_write(&osdc->lock);
3260 }
3261
3262 /*
3263  * Resubmit requests pending on the given osd.
3264  */
3265 static void kick_osd_requests(struct ceph_osd *osd)
3266 {
3267         struct rb_node *n;
3268
3269         for (n = rb_first(&osd->o_requests); n; ) {
3270                 struct ceph_osd_request *req =
3271                     rb_entry(n, struct ceph_osd_request, r_node);
3272
3273                 n = rb_next(n); /* cancel_linger_request() */
3274
3275                 if (!req->r_linger) {
3276                         if (!req->r_t.paused)
3277                                 send_request(req);
3278                 } else {
3279                         cancel_linger_request(req);
3280                 }
3281         }
3282         for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
3283                 struct ceph_osd_linger_request *lreq =
3284                     rb_entry(n, struct ceph_osd_linger_request, node);
3285
3286                 send_linger(lreq);
3287         }
3288 }
3289
3290 /*
3291  * If the osd connection drops, we need to resubmit all requests.
3292  */
3293 static void osd_fault(struct ceph_connection *con)
3294 {
3295         struct ceph_osd *osd = con->private;
3296         struct ceph_osd_client *osdc = osd->o_osdc;
3297
3298         dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
3299
3300         down_write(&osdc->lock);
3301         if (!osd_registered(osd)) {
3302                 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3303                 goto out_unlock;
3304         }
3305
3306         if (!reopen_osd(osd))
3307                 kick_osd_requests(osd);
3308         maybe_request_map(osdc);
3309
3310 out_unlock:
3311         up_write(&osdc->lock);
3312 }
3313
3314 /*
3315  * Process osd watch notifications
3316  */
3317 static void handle_watch_notify(struct ceph_osd_client *osdc,
3318                                 struct ceph_msg *msg)
3319 {
3320         void *p = msg->front.iov_base;
3321         void *const end = p + msg->front.iov_len;
3322         struct ceph_osd_linger_request *lreq;
3323         struct linger_work *lwork;
3324         u8 proto_ver, opcode;
3325         u64 cookie, notify_id;
3326         u64 notifier_id = 0;
3327         s32 return_code = 0;
3328         void *payload = NULL;
3329         u32 payload_len = 0;
3330
3331         ceph_decode_8_safe(&p, end, proto_ver, bad);
3332         ceph_decode_8_safe(&p, end, opcode, bad);
3333         ceph_decode_64_safe(&p, end, cookie, bad);
3334         p += 8; /* skip ver */
3335         ceph_decode_64_safe(&p, end, notify_id, bad);
3336
3337         if (proto_ver >= 1) {
3338                 ceph_decode_32_safe(&p, end, payload_len, bad);
3339                 ceph_decode_need(&p, end, payload_len, bad);
3340                 payload = p;
3341                 p += payload_len;
3342         }
3343
3344         if (le16_to_cpu(msg->hdr.version) >= 2)
3345                 ceph_decode_32_safe(&p, end, return_code, bad);
3346
3347         if (le16_to_cpu(msg->hdr.version) >= 3)
3348                 ceph_decode_64_safe(&p, end, notifier_id, bad);
3349
3350         down_read(&osdc->lock);
3351         lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
3352         if (!lreq) {
3353                 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
3354                      cookie);
3355                 goto out_unlock_osdc;
3356         }
3357
3358         mutex_lock(&lreq->lock);
3359         dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
3360              opcode, cookie, lreq, lreq->is_watch);
3361         if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
3362                 if (!lreq->last_error) {
3363                         lreq->last_error = -ENOTCONN;
3364                         queue_watch_error(lreq);
3365                 }
3366         } else if (!lreq->is_watch) {
3367                 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
3368                 if (lreq->notify_id && lreq->notify_id != notify_id) {
3369                         dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
3370                              lreq->notify_id, notify_id);
3371                 } else if (!completion_done(&lreq->notify_finish_wait)) {
3372                         struct ceph_msg_data *data =
3373                             list_first_entry_or_null(&msg->data,
3374                                                      struct ceph_msg_data,
3375                                                      links);
3376
3377                         if (data) {
3378                                 if (lreq->preply_pages) {
3379                                         WARN_ON(data->type !=
3380                                                         CEPH_MSG_DATA_PAGES);
3381                                         *lreq->preply_pages = data->pages;
3382                                         *lreq->preply_len = data->length;
3383                                 } else {
3384                                         ceph_release_page_vector(data->pages,
3385                                                calc_pages_for(0, data->length));
3386                                 }
3387                         }
3388                         lreq->notify_finish_error = return_code;
3389                         complete_all(&lreq->notify_finish_wait);
3390                 }
3391         } else {
3392                 /* CEPH_WATCH_EVENT_NOTIFY */
3393                 lwork = lwork_alloc(lreq, do_watch_notify);
3394                 if (!lwork) {
3395                         pr_err("failed to allocate notify-lwork\n");
3396                         goto out_unlock_lreq;
3397                 }
3398
3399                 lwork->notify.notify_id = notify_id;
3400                 lwork->notify.notifier_id = notifier_id;
3401                 lwork->notify.payload = payload;
3402                 lwork->notify.payload_len = payload_len;
3403                 lwork->notify.msg = ceph_msg_get(msg);
3404                 lwork_queue(lwork);
3405         }
3406
3407 out_unlock_lreq:
3408         mutex_unlock(&lreq->lock);
3409 out_unlock_osdc:
3410         up_read(&osdc->lock);
3411         return;
3412
3413 bad:
3414         pr_err("osdc handle_watch_notify corrupt msg\n");
3415 }
3416
3417 /*
3418  * Register request, send initial attempt.
3419  */
3420 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
3421                             struct ceph_osd_request *req,
3422                             bool nofail)
3423 {
3424         down_read(&osdc->lock);
3425         submit_request(req, false);
3426         up_read(&osdc->lock);
3427
3428         return 0;
3429 }
3430 EXPORT_SYMBOL(ceph_osdc_start_request);
3431
3432 /*
3433  * Unregister a registered request.  The request is not completed (i.e.
3434  * no callbacks or wakeups) - higher layers are supposed to know what
3435  * they are canceling.
3436  */
3437 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
3438 {
3439         struct ceph_osd_client *osdc = req->r_osdc;
3440
3441         down_write(&osdc->lock);
3442         if (req->r_osd)
3443                 cancel_request(req);
3444         up_write(&osdc->lock);
3445 }
3446 EXPORT_SYMBOL(ceph_osdc_cancel_request);
3447
3448 /*
3449  * @timeout: in jiffies, 0 means "wait forever"
3450  */
3451 static int wait_request_timeout(struct ceph_osd_request *req,
3452                                 unsigned long timeout)
3453 {
3454         long left;
3455
3456         dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3457         left = wait_for_completion_interruptible_timeout(&req->r_completion,
3458                                                 ceph_timeout_jiffies(timeout));
3459         if (left <= 0) {
3460                 left = left ?: -ETIMEDOUT;
3461                 ceph_osdc_cancel_request(req);
3462
3463                 /* kludge - need to to wake ceph_osdc_sync() */
3464                 complete_all(&req->r_safe_completion);
3465         } else {
3466                 left = req->r_result; /* completed */
3467         }
3468
3469         return left;
3470 }
3471
3472 /*
3473  * wait for a request to complete
3474  */
3475 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
3476                            struct ceph_osd_request *req)
3477 {
3478         return wait_request_timeout(req, 0);
3479 }
3480 EXPORT_SYMBOL(ceph_osdc_wait_request);
3481
3482 /*
3483  * sync - wait for all in-flight requests to flush.  avoid starvation.
3484  */
3485 void ceph_osdc_sync(struct ceph_osd_client *osdc)
3486 {
3487         struct rb_node *n, *p;
3488         u64 last_tid = atomic64_read(&osdc->last_tid);
3489
3490 again:
3491         down_read(&osdc->lock);
3492         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3493                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3494
3495                 mutex_lock(&osd->lock);
3496                 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
3497                         struct ceph_osd_request *req =
3498                             rb_entry(p, struct ceph_osd_request, r_node);
3499
3500                         if (req->r_tid > last_tid)
3501                                 break;
3502
3503                         if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
3504                                 continue;
3505
3506                         ceph_osdc_get_request(req);
3507                         mutex_unlock(&osd->lock);
3508                         up_read(&osdc->lock);
3509                         dout("%s waiting on req %p tid %llu last_tid %llu\n",
3510                              __func__, req, req->r_tid, last_tid);
3511                         wait_for_completion(&req->r_safe_completion);
3512                         ceph_osdc_put_request(req);
3513                         goto again;
3514                 }
3515
3516                 mutex_unlock(&osd->lock);
3517         }
3518
3519         up_read(&osdc->lock);
3520         dout("%s done last_tid %llu\n", __func__, last_tid);
3521 }
3522 EXPORT_SYMBOL(ceph_osdc_sync);
3523
3524 static struct ceph_osd_request *
3525 alloc_linger_request(struct ceph_osd_linger_request *lreq)
3526 {
3527         struct ceph_osd_request *req;
3528
3529         req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
3530         if (!req)
3531                 return NULL;
3532
3533         ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3534         ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3535
3536         if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
3537                 ceph_osdc_put_request(req);
3538                 return NULL;
3539         }
3540
3541         return req;
3542 }
3543
3544 /*
3545  * Returns a handle, caller owns a ref.
3546  */
3547 struct ceph_osd_linger_request *
3548 ceph_osdc_watch(struct ceph_osd_client *osdc,
3549                 struct ceph_object_id *oid,
3550                 struct ceph_object_locator *oloc,
3551                 rados_watchcb2_t wcb,
3552                 rados_watcherrcb_t errcb,
3553                 void *data)
3554 {
3555         struct ceph_osd_linger_request *lreq;
3556         int ret;
3557
3558         lreq = linger_alloc(osdc);
3559         if (!lreq)
3560                 return ERR_PTR(-ENOMEM);
3561
3562         lreq->is_watch = true;
3563         lreq->wcb = wcb;
3564         lreq->errcb = errcb;
3565         lreq->data = data;
3566         lreq->watch_valid_thru = jiffies;
3567
3568         ceph_oid_copy(&lreq->t.base_oid, oid);
3569         ceph_oloc_copy(&lreq->t.base_oloc, oloc);
3570         lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
3571         lreq->mtime = CURRENT_TIME;
3572
3573         lreq->reg_req = alloc_linger_request(lreq);
3574         if (!lreq->reg_req) {
3575                 ret = -ENOMEM;
3576                 goto err_put_lreq;
3577         }
3578
3579         lreq->ping_req = alloc_linger_request(lreq);
3580         if (!lreq->ping_req) {
3581                 ret = -ENOMEM;
3582                 goto err_put_lreq;
3583         }
3584
3585         down_write(&osdc->lock);
3586         linger_register(lreq); /* before osd_req_op_* */
3587         osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
3588                               CEPH_OSD_WATCH_OP_WATCH);
3589         osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
3590                               CEPH_OSD_WATCH_OP_PING);
3591         linger_submit(lreq);
3592         up_write(&osdc->lock);
3593
3594         ret = linger_reg_commit_wait(lreq);
3595         if (ret) {
3596                 linger_cancel(lreq);
3597                 goto err_put_lreq;
3598         }
3599
3600         return lreq;
3601
3602 err_put_lreq:
3603         linger_put(lreq);
3604         return ERR_PTR(ret);
3605 }
3606 EXPORT_SYMBOL(ceph_osdc_watch);
3607
3608 /*
3609  * Releases a ref.
3610  *
3611  * Times out after mount_timeout to preserve rbd unmap behaviour
3612  * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
3613  * with mount_timeout").
3614  */
3615 int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
3616                       struct ceph_osd_linger_request *lreq)
3617 {
3618         struct ceph_options *opts = osdc->client->options;
3619         struct ceph_osd_request *req;
3620         int ret;
3621
3622         req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3623         if (!req)
3624                 return -ENOMEM;
3625
3626         ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3627         ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3628         req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
3629         req->r_mtime = CURRENT_TIME;
3630         osd_req_op_watch_init(req, 0, lreq->linger_id,
3631                               CEPH_OSD_WATCH_OP_UNWATCH);
3632
3633         ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3634         if (ret)
3635                 goto out_put_req;
3636
3637         ceph_osdc_start_request(osdc, req, false);
3638         linger_cancel(lreq);
3639         linger_put(lreq);
3640         ret = wait_request_timeout(req, opts->mount_timeout);
3641
3642 out_put_req:
3643         ceph_osdc_put_request(req);
3644         return ret;
3645 }
3646 EXPORT_SYMBOL(ceph_osdc_unwatch);
3647
3648 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
3649                                       u64 notify_id, u64 cookie, void *payload,
3650                                       size_t payload_len)
3651 {
3652         struct ceph_osd_req_op *op;
3653         struct ceph_pagelist *pl;
3654         int ret;
3655
3656         op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
3657
3658         pl = kmalloc(sizeof(*pl), GFP_NOIO);
3659         if (!pl)
3660                 return -ENOMEM;
3661
3662         ceph_pagelist_init(pl);
3663         ret = ceph_pagelist_encode_64(pl, notify_id);
3664         ret |= ceph_pagelist_encode_64(pl, cookie);
3665         if (payload) {
3666                 ret |= ceph_pagelist_encode_32(pl, payload_len);
3667                 ret |= ceph_pagelist_append(pl, payload, payload_len);
3668         } else {
3669                 ret |= ceph_pagelist_encode_32(pl, 0);
3670         }
3671         if (ret) {
3672                 ceph_pagelist_release(pl);
3673                 return -ENOMEM;
3674         }
3675
3676         ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
3677         op->indata_len = pl->length;
3678         return 0;
3679 }
3680
3681 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
3682                          struct ceph_object_id *oid,
3683                          struct ceph_object_locator *oloc,
3684                          u64 notify_id,
3685                          u64 cookie,
3686                          void *payload,
3687                          size_t payload_len)
3688 {
3689         struct ceph_osd_request *req;
3690         int ret;
3691
3692         req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3693         if (!req)
3694                 return -ENOMEM;
3695
3696         ceph_oid_copy(&req->r_base_oid, oid);
3697         ceph_oloc_copy(&req->r_base_oloc, oloc);
3698         req->r_flags = CEPH_OSD_FLAG_READ;
3699
3700         ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3701         if (ret)
3702                 goto out_put_req;
3703
3704         ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
3705                                          payload_len);
3706         if (ret)
3707                 goto out_put_req;
3708
3709         ceph_osdc_start_request(osdc, req, false);
3710         ret = ceph_osdc_wait_request(osdc, req);
3711
3712 out_put_req:
3713         ceph_osdc_put_request(req);
3714         return ret;
3715 }
3716 EXPORT_SYMBOL(ceph_osdc_notify_ack);
3717
3718 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
3719                                   u64 cookie, u32 prot_ver, u32 timeout,
3720                                   void *payload, size_t payload_len)
3721 {
3722         struct ceph_osd_req_op *op;
3723         struct ceph_pagelist *pl;
3724         int ret;
3725
3726         op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
3727         op->notify.cookie = cookie;
3728
3729         pl = kmalloc(sizeof(*pl), GFP_NOIO);
3730         if (!pl)
3731                 return -ENOMEM;
3732
3733         ceph_pagelist_init(pl);
3734         ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
3735         ret |= ceph_pagelist_encode_32(pl, timeout);
3736         ret |= ceph_pagelist_encode_32(pl, payload_len);
3737         ret |= ceph_pagelist_append(pl, payload, payload_len);
3738         if (ret) {
3739                 ceph_pagelist_release(pl);
3740                 return -ENOMEM;
3741         }
3742
3743         ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
3744         op->indata_len = pl->length;
3745         return 0;
3746 }
3747
3748 /*
3749  * @timeout: in seconds
3750  *
3751  * @preply_{pages,len} are initialized both on success and error.
3752  * The caller is responsible for:
3753  *
3754  *     ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
3755  */
3756 int ceph_osdc_notify(struct ceph_osd_client *osdc,
3757                      struct ceph_object_id *oid,
3758                      struct ceph_object_locator *oloc,
3759                      void *payload,
3760                      size_t payload_len,
3761                      u32 timeout,
3762                      struct page ***preply_pages,
3763                      size_t *preply_len)
3764 {
3765         struct ceph_osd_linger_request *lreq;
3766         struct page **pages;
3767         int ret;
3768
3769         WARN_ON(!timeout);
3770         if (preply_pages) {
3771                 *preply_pages = NULL;
3772                 *preply_len = 0;
3773         }
3774
3775         lreq = linger_alloc(osdc);
3776         if (!lreq)
3777                 return -ENOMEM;
3778
3779         lreq->preply_pages = preply_pages;
3780         lreq->preply_len = preply_len;
3781
3782         ceph_oid_copy(&lreq->t.base_oid, oid);
3783         ceph_oloc_copy(&lreq->t.base_oloc, oloc);
3784         lreq->t.flags = CEPH_OSD_FLAG_READ;
3785
3786         lreq->reg_req = alloc_linger_request(lreq);
3787         if (!lreq->reg_req) {
3788                 ret = -ENOMEM;
3789                 goto out_put_lreq;
3790         }
3791
3792         /* for notify_id */
3793         pages = ceph_alloc_page_vector(1, GFP_NOIO);
3794         if (IS_ERR(pages)) {
3795                 ret = PTR_ERR(pages);
3796                 goto out_put_lreq;
3797         }
3798
3799         down_write(&osdc->lock);
3800         linger_register(lreq); /* before osd_req_op_* */
3801         ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
3802                                      timeout, payload, payload_len);
3803         if (ret) {
3804                 linger_unregister(lreq);
3805                 up_write(&osdc->lock);
3806                 ceph_release_page_vector(pages, 1);
3807                 goto out_put_lreq;
3808         }
3809         ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
3810                                                  response_data),
3811                                  pages, PAGE_SIZE, 0, false, true);
3812         linger_submit(lreq);
3813         up_write(&osdc->lock);
3814
3815         ret = linger_reg_commit_wait(lreq);
3816         if (!ret)
3817                 ret = linger_notify_finish_wait(lreq);
3818         else
3819                 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
3820
3821         linger_cancel(lreq);
3822 out_put_lreq:
3823         linger_put(lreq);
3824         return ret;
3825 }
3826 EXPORT_SYMBOL(ceph_osdc_notify);
3827
3828 /*
3829  * Return the number of milliseconds since the watch was last
3830  * confirmed, or an error.  If there is an error, the watch is no
3831  * longer valid, and should be destroyed with ceph_osdc_unwatch().
3832  */
3833 int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
3834                           struct ceph_osd_linger_request *lreq)
3835 {
3836         unsigned long stamp, age;
3837         int ret;
3838
3839         down_read(&osdc->lock);
3840         mutex_lock(&lreq->lock);
3841         stamp = lreq->watch_valid_thru;
3842         if (!list_empty(&lreq->pending_lworks)) {
3843                 struct linger_work *lwork =
3844                     list_first_entry(&lreq->pending_lworks,
3845                                      struct linger_work,
3846                                      pending_item);
3847
3848                 if (time_before(lwork->queued_stamp, stamp))
3849                         stamp = lwork->queued_stamp;
3850         }
3851         age = jiffies - stamp;
3852         dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
3853              lreq, lreq->linger_id, age, lreq->last_error);
3854         /* we are truncating to msecs, so return a safe upper bound */
3855         ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
3856
3857         mutex_unlock(&lreq->lock);
3858         up_read(&osdc->lock);
3859         return ret;
3860 }
3861
3862 /*
3863  * Call all pending notify callbacks - for use after a watch is
3864  * unregistered, to make sure no more callbacks for it will be invoked
3865  */
3866 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
3867 {
3868         flush_workqueue(osdc->notify_wq);
3869 }
3870 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
3871
3872 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
3873 {
3874         down_read(&osdc->lock);
3875         maybe_request_map(osdc);
3876         up_read(&osdc->lock);
3877 }
3878 EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
3879
3880 /*
3881  * init, shutdown
3882  */
3883 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
3884 {
3885         int err;
3886
3887         dout("init\n");
3888         osdc->client = client;
3889         init_rwsem(&osdc->lock);
3890         osdc->osds = RB_ROOT;
3891         INIT_LIST_HEAD(&osdc->osd_lru);
3892         spin_lock_init(&osdc->osd_lru_lock);
3893         osd_init(&osdc->homeless_osd);
3894         osdc->homeless_osd.o_osdc = osdc;
3895         osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
3896         osdc->linger_requests = RB_ROOT;
3897         osdc->map_checks = RB_ROOT;
3898         osdc->linger_map_checks = RB_ROOT;
3899         INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
3900         INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
3901
3902         err = -ENOMEM;
3903         osdc->osdmap = ceph_osdmap_alloc();
3904         if (!osdc->osdmap)
3905                 goto out;
3906
3907         osdc->req_mempool = mempool_create_slab_pool(10,
3908                                                      ceph_osd_request_cache);
3909         if (!osdc->req_mempool)
3910                 goto out_map;
3911
3912         err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
3913                                 PAGE_SIZE, 10, true, "osd_op");
3914         if (err < 0)
3915                 goto out_mempool;
3916         err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
3917                                 PAGE_SIZE, 10, true, "osd_op_reply");
3918         if (err < 0)
3919                 goto out_msgpool;
3920
3921         err = -ENOMEM;
3922         osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
3923         if (!osdc->notify_wq)
3924                 goto out_msgpool_reply;
3925
3926         schedule_delayed_work(&osdc->timeout_work,
3927                               osdc->client->options->osd_keepalive_timeout);
3928         schedule_delayed_work(&osdc->osds_timeout_work,
3929             round_jiffies_relative(osdc->client->options->osd_idle_ttl));
3930
3931         return 0;
3932
3933 out_msgpool_reply:
3934         ceph_msgpool_destroy(&osdc->msgpool_op_reply);
3935 out_msgpool:
3936         ceph_msgpool_destroy(&osdc->msgpool_op);
3937 out_mempool:
3938         mempool_destroy(osdc->req_mempool);
3939 out_map:
3940         ceph_osdmap_destroy(osdc->osdmap);
3941 out:
3942         return err;
3943 }
3944
3945 void ceph_osdc_stop(struct ceph_osd_client *osdc)
3946 {
3947         flush_workqueue(osdc->notify_wq);
3948         destroy_workqueue(osdc->notify_wq);
3949         cancel_delayed_work_sync(&osdc->timeout_work);
3950         cancel_delayed_work_sync(&osdc->osds_timeout_work);
3951
3952         down_write(&osdc->lock);
3953         while (!RB_EMPTY_ROOT(&osdc->osds)) {
3954                 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
3955                                                 struct ceph_osd, o_node);
3956                 close_osd(osd);
3957         }
3958         up_write(&osdc->lock);
3959         WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1);
3960         osd_cleanup(&osdc->homeless_osd);
3961
3962         WARN_ON(!list_empty(&osdc->osd_lru));
3963         WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
3964         WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
3965         WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
3966         WARN_ON(atomic_read(&osdc->num_requests));
3967         WARN_ON(atomic_read(&osdc->num_homeless));
3968
3969         ceph_osdmap_destroy(osdc->osdmap);
3970         mempool_destroy(osdc->req_mempool);
3971         ceph_msgpool_destroy(&osdc->msgpool_op);
3972         ceph_msgpool_destroy(&osdc->msgpool_op_reply);
3973 }
3974
3975 /*
3976  * Read some contiguous pages.  If we cross a stripe boundary, shorten
3977  * *plen.  Return number of bytes read, or error.
3978  */
3979 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
3980                         struct ceph_vino vino, struct ceph_file_layout *layout,
3981                         u64 off, u64 *plen,
3982                         u32 truncate_seq, u64 truncate_size,
3983                         struct page **pages, int num_pages, int page_align)
3984 {
3985         struct ceph_osd_request *req;
3986         int rc = 0;
3987
3988         dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
3989              vino.snap, off, *plen);
3990         req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
3991                                     CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
3992                                     NULL, truncate_seq, truncate_size,
3993                                     false);
3994         if (IS_ERR(req))
3995                 return PTR_ERR(req);
3996
3997         /* it may be a short read due to an object boundary */
3998         osd_req_op_extent_osd_data_pages(req, 0,
3999                                 pages, *plen, page_align, false, false);
4000
4001         dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
4002              off, *plen, *plen, page_align);
4003
4004         rc = ceph_osdc_start_request(osdc, req, false);
4005         if (!rc)
4006                 rc = ceph_osdc_wait_request(osdc, req);
4007
4008         ceph_osdc_put_request(req);
4009         dout("readpages result %d\n", rc);
4010         return rc;
4011 }
4012 EXPORT_SYMBOL(ceph_osdc_readpages);
4013
4014 /*
4015  * do a synchronous write on N pages
4016  */
4017 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
4018                          struct ceph_file_layout *layout,
4019                          struct ceph_snap_context *snapc,
4020                          u64 off, u64 len,
4021                          u32 truncate_seq, u64 truncate_size,
4022                          struct timespec *mtime,
4023                          struct page **pages, int num_pages)
4024 {
4025         struct ceph_osd_request *req;
4026         int rc = 0;
4027         int page_align = off & ~PAGE_MASK;
4028
4029         req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
4030                                     CEPH_OSD_OP_WRITE,
4031                                     CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
4032                                     snapc, truncate_seq, truncate_size,
4033                                     true);
4034         if (IS_ERR(req))
4035                 return PTR_ERR(req);
4036
4037         /* it may be a short write due to an object boundary */
4038         osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
4039                                 false, false);
4040         dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
4041
4042         req->r_mtime = *mtime;
4043         rc = ceph_osdc_start_request(osdc, req, true);
4044         if (!rc)
4045                 rc = ceph_osdc_wait_request(osdc, req);
4046
4047         ceph_osdc_put_request(req);
4048         if (rc == 0)
4049                 rc = len;
4050         dout("writepages result %d\n", rc);
4051         return rc;
4052 }
4053 EXPORT_SYMBOL(ceph_osdc_writepages);
4054
4055 int ceph_osdc_setup(void)
4056 {
4057         size_t size = sizeof(struct ceph_osd_request) +
4058             CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
4059
4060         BUG_ON(ceph_osd_request_cache);
4061         ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
4062                                                    0, 0, NULL);
4063
4064         return ceph_osd_request_cache ? 0 : -ENOMEM;
4065 }
4066 EXPORT_SYMBOL(ceph_osdc_setup);
4067
4068 void ceph_osdc_cleanup(void)
4069 {
4070         BUG_ON(!ceph_osd_request_cache);
4071         kmem_cache_destroy(ceph_osd_request_cache);
4072         ceph_osd_request_cache = NULL;
4073 }
4074 EXPORT_SYMBOL(ceph_osdc_cleanup);
4075
4076 /*
4077  * handle incoming message
4078  */
4079 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
4080 {
4081         struct ceph_osd *osd = con->private;
4082         struct ceph_osd_client *osdc = osd->o_osdc;
4083         int type = le16_to_cpu(msg->hdr.type);
4084
4085         switch (type) {
4086         case CEPH_MSG_OSD_MAP:
4087                 ceph_osdc_handle_map(osdc, msg);
4088                 break;
4089         case CEPH_MSG_OSD_OPREPLY:
4090                 handle_reply(osd, msg);
4091                 break;
4092         case CEPH_MSG_WATCH_NOTIFY:
4093                 handle_watch_notify(osdc, msg);
4094                 break;
4095
4096         default:
4097                 pr_err("received unknown message type %d %s\n", type,
4098                        ceph_msg_type_name(type));
4099         }
4100
4101         ceph_msg_put(msg);
4102 }
4103
4104 /*
4105  * Lookup and return message for incoming reply.  Don't try to do
4106  * anything about a larger than preallocated data portion of the
4107  * message at the moment - for now, just skip the message.
4108  */
4109 static struct ceph_msg *get_reply(struct ceph_connection *con,
4110                                   struct ceph_msg_header *hdr,
4111                                   int *skip)
4112 {
4113         struct ceph_osd *osd = con->private;
4114         struct ceph_osd_client *osdc = osd->o_osdc;
4115         struct ceph_msg *m = NULL;
4116         struct ceph_osd_request *req;
4117         int front_len = le32_to_cpu(hdr->front_len);
4118         int data_len = le32_to_cpu(hdr->data_len);
4119         u64 tid = le64_to_cpu(hdr->tid);
4120
4121         down_read(&osdc->lock);
4122         if (!osd_registered(osd)) {
4123                 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
4124                 *skip = 1;
4125                 goto out_unlock_osdc;
4126         }
4127         WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
4128
4129         mutex_lock(&osd->lock);
4130         req = lookup_request(&osd->o_requests, tid);
4131         if (!req) {
4132                 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
4133                      osd->o_osd, tid);
4134                 *skip = 1;
4135                 goto out_unlock_session;
4136         }
4137
4138         ceph_msg_revoke_incoming(req->r_reply);
4139
4140         if (front_len > req->r_reply->front_alloc_len) {
4141                 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
4142                         __func__, osd->o_osd, req->r_tid, front_len,
4143                         req->r_reply->front_alloc_len);
4144                 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
4145                                  false);
4146                 if (!m)
4147                         goto out_unlock_session;
4148                 ceph_msg_put(req->r_reply);
4149                 req->r_reply = m;
4150         }
4151
4152         if (data_len > req->r_reply->data_length) {
4153                 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
4154                         __func__, osd->o_osd, req->r_tid, data_len,
4155                         req->r_reply->data_length);
4156                 m = NULL;
4157                 *skip = 1;
4158                 goto out_unlock_session;
4159         }
4160
4161         m = ceph_msg_get(req->r_reply);
4162         dout("get_reply tid %lld %p\n", tid, m);
4163
4164 out_unlock_session:
4165         mutex_unlock(&osd->lock);
4166 out_unlock_osdc:
4167         up_read(&osdc->lock);
4168         return m;
4169 }
4170
4171 /*
4172  * TODO: switch to a msg-owned pagelist
4173  */
4174 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
4175 {
4176         struct ceph_msg *m;
4177         int type = le16_to_cpu(hdr->type);
4178         u32 front_len = le32_to_cpu(hdr->front_len);
4179         u32 data_len = le32_to_cpu(hdr->data_len);
4180
4181         m = ceph_msg_new(type, front_len, GFP_NOIO, false);
4182         if (!m)
4183                 return NULL;
4184
4185         if (data_len) {
4186                 struct page **pages;
4187                 struct ceph_osd_data osd_data;
4188
4189                 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
4190                                                GFP_NOIO);
4191                 if (!pages) {
4192                         ceph_msg_put(m);
4193                         return NULL;
4194                 }
4195
4196                 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
4197                                          false);
4198                 ceph_osdc_msg_data_add(m, &osd_data);
4199         }
4200
4201         return m;
4202 }
4203
4204 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
4205                                   struct ceph_msg_header *hdr,
4206                                   int *skip)
4207 {
4208         struct ceph_osd *osd = con->private;
4209         int type = le16_to_cpu(hdr->type);
4210
4211         *skip = 0;
4212         switch (type) {
4213         case CEPH_MSG_OSD_MAP:
4214         case CEPH_MSG_WATCH_NOTIFY:
4215                 return alloc_msg_with_page_vector(hdr);
4216         case CEPH_MSG_OSD_OPREPLY:
4217                 return get_reply(con, hdr, skip);
4218         default:
4219                 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
4220                         osd->o_osd, type);
4221                 *skip = 1;
4222                 return NULL;
4223         }
4224 }
4225
4226 /*
4227  * Wrappers to refcount containing ceph_osd struct
4228  */
4229 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
4230 {
4231         struct ceph_osd *osd = con->private;
4232         if (get_osd(osd))
4233                 return con;
4234         return NULL;
4235 }
4236
4237 static void put_osd_con(struct ceph_connection *con)
4238 {
4239         struct ceph_osd *osd = con->private;
4240         put_osd(osd);
4241 }
4242
4243 /*
4244  * authentication
4245  */
4246 /*
4247  * Note: returned pointer is the address of a structure that's
4248  * managed separately.  Caller must *not* attempt to free it.
4249  */
4250 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
4251                                         int *proto, int force_new)
4252 {
4253         struct ceph_osd *o = con->private;
4254         struct ceph_osd_client *osdc = o->o_osdc;
4255         struct ceph_auth_client *ac = osdc->client->monc.auth;
4256         struct ceph_auth_handshake *auth = &o->o_auth;
4257
4258         if (force_new && auth->authorizer) {
4259                 ceph_auth_destroy_authorizer(auth->authorizer);
4260                 auth->authorizer = NULL;
4261         }
4262         if (!auth->authorizer) {
4263                 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
4264                                                       auth);
4265                 if (ret)
4266                         return ERR_PTR(ret);
4267         } else {
4268                 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
4269                                                      auth);
4270                 if (ret)
4271                         return ERR_PTR(ret);
4272         }
4273         *proto = ac->protocol;
4274
4275         return auth;
4276 }
4277
4278
4279 static int verify_authorizer_reply(struct ceph_connection *con, int len)
4280 {
4281         struct ceph_osd *o = con->private;
4282         struct ceph_osd_client *osdc = o->o_osdc;
4283         struct ceph_auth_client *ac = osdc->client->monc.auth;
4284
4285         return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4286 }
4287
4288 static int invalidate_authorizer(struct ceph_connection *con)
4289 {
4290         struct ceph_osd *o = con->private;
4291         struct ceph_osd_client *osdc = o->o_osdc;
4292         struct ceph_auth_client *ac = osdc->client->monc.auth;
4293
4294         ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
4295         return ceph_monc_validate_auth(&osdc->client->monc);
4296 }
4297
4298 static int osd_sign_message(struct ceph_msg *msg)
4299 {
4300         struct ceph_osd *o = msg->con->private;
4301         struct ceph_auth_handshake *auth = &o->o_auth;
4302
4303         return ceph_auth_sign_message(auth, msg);
4304 }
4305
4306 static int osd_check_message_signature(struct ceph_msg *msg)
4307 {
4308         struct ceph_osd *o = msg->con->private;
4309         struct ceph_auth_handshake *auth = &o->o_auth;
4310
4311         return ceph_auth_check_message_signature(auth, msg);
4312 }
4313
4314 static const struct ceph_connection_operations osd_con_ops = {
4315         .get = get_osd_con,
4316         .put = put_osd_con,
4317         .dispatch = dispatch,
4318         .get_authorizer = get_authorizer,
4319         .verify_authorizer_reply = verify_authorizer_reply,
4320         .invalidate_authorizer = invalidate_authorizer,
4321         .alloc_msg = alloc_msg,
4322         .sign_message = osd_sign_message,
4323         .check_message_signature = osd_check_message_signature,
4324         .fault = osd_fault,
4325 };