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 static void __send_queued(struct ceph_osd_client *osdc);
  29 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
  30 static void __register_request(struct ceph_osd_client *osdc,
  31                                struct ceph_osd_request *req);
  32 static void __unregister_request(struct ceph_osd_client *osdc,
  33                                  struct ceph_osd_request *req);
  34 static void __unregister_linger_request(struct ceph_osd_client *osdc,
  35                                         struct ceph_osd_request *req);
  36 static void __enqueue_request(struct ceph_osd_request *req);
  37
  38 /*
  39  * Implement client access to distributed object storage cluster.
  40  *
  41  * All data objects are stored within a cluster/cloud of OSDs, or
  42  * "object storage devices."  (Note that Ceph OSDs have _nothing_ to
  43  * do with the T10 OSD extensions to SCSI.)  Ceph OSDs are simply
  44  * remote daemons serving up and coordinating consistent and safe
  45  * access to storage.
  46  *
  47  * Cluster membership and the mapping of data objects onto storage devices
  48  * are described by the osd map.
  49  *
  50  * We keep track of pending OSD requests (read, write), resubmit
  51  * requests to different OSDs when the cluster topology/data layout
  52  * change, or retry the affected requests when the communications
  53  * channel with an OSD is reset.
  54  */
  55
  56 /*
  57  * calculate the mapping of a file extent onto an object, and fill out the
  58  * request accordingly.  shorten extent as necessary if it crosses an
  59  * object boundary.
  60  *
  61  * fill osd op in request message.
  62  */
  63 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
  64                         u64 *objnum, u64 *objoff, u64 *objlen)
  65 {
  66         u64 orig_len = *plen;
  67         int r;
  68
  69         /* object extent? */
  70         r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
  71                                           objoff, objlen);
  72         if (r < 0)
  73                 return r;
  74         if (*objlen < orig_len) {
  75                 *plen = *objlen;
  76                 dout(" skipping last %llu, final file extent %llu~%llu\n",
  77                      orig_len - *plen, off, *plen);
  78         }
  79
  80         dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
  81
  82         return 0;
  83 }
  84
  85 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
  86 {
  87         memset(osd_data, 0, sizeof (*osd_data));
  88         osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
  89 }
  90
  91 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
  92                         struct page **pages, u64 length, u32 alignment,
  93                         bool pages_from_pool, bool own_pages)
  94 {
  95         osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
  96         osd_data->pages = pages;
  97         osd_data->length = length;
  98         osd_data->alignment = alignment;
  99         osd_data->pages_from_pool = pages_from_pool;
 100         osd_data->own_pages = own_pages;
 101 }
 102
 103 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
 104                         struct ceph_pagelist *pagelist)
 105 {
 106         osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
 107         osd_data->pagelist = pagelist;
 108 }
 109
 110 #ifdef CONFIG_BLOCK
 111 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
 112                         struct bio *bio, size_t bio_length)
 113 {
 114         osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
 115         osd_data->bio = bio;
 116         osd_data->bio_length = bio_length;
 117 }
 118 #endif /* CONFIG_BLOCK */
 119
 120 #define osd_req_op_data(oreq, whch, typ, fld)                           \
 121 ({                                                                      \
 122         struct ceph_osd_request *__oreq = (oreq);                       \
 123         unsigned int __whch = (whch);                                   \
 124         BUG_ON(__whch >= __oreq->r_num_ops);                            \
 125         &__oreq->r_ops[__whch].typ.fld;                                 \
 126 })
 127
 128 static struct ceph_osd_data *
 129 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
 130 {
 131         BUG_ON(which >= osd_req->r_num_ops);
 132
 133         return &osd_req->r_ops[which].raw_data_in;
 134 }
 135
 136 struct ceph_osd_data *
 137 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
 138                         unsigned int which)
 139 {
 140         return osd_req_op_data(osd_req, which, extent, osd_data);
 141 }
 142 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
 143
 144 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
 145                         unsigned int which, struct page **pages,
 146                         u64 length, u32 alignment,
 147                         bool pages_from_pool, bool own_pages)
 148 {
 149         struct ceph_osd_data *osd_data;
 150
 151         osd_data = osd_req_op_raw_data_in(osd_req, which);
 152         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 153                                 pages_from_pool, own_pages);
 154 }
 155 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
 156
 157 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
 158                         unsigned int which, struct page **pages,
 159                         u64 length, u32 alignment,
 160                         bool pages_from_pool, bool own_pages)
 161 {
 162         struct ceph_osd_data *osd_data;
 163
 164         osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 165         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 166                                 pages_from_pool, own_pages);
 167 }
 168 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
 169
 170 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
 171                         unsigned int which, struct ceph_pagelist *pagelist)
 172 {
 173         struct ceph_osd_data *osd_data;
 174
 175         osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 176         ceph_osd_data_pagelist_init(osd_data, pagelist);
 177 }
 178 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
 179
 180 #ifdef CONFIG_BLOCK
 181 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
 182                         unsigned int which, struct bio *bio, size_t bio_length)
 183 {
 184         struct ceph_osd_data *osd_data;
 185
 186         osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 187         ceph_osd_data_bio_init(osd_data, bio, bio_length);
 188 }
 189 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
 190 #endif /* CONFIG_BLOCK */
 191
 192 static void osd_req_op_cls_request_info_pagelist(
 193                         struct ceph_osd_request *osd_req,
 194                         unsigned int which, struct ceph_pagelist *pagelist)
 195 {
 196         struct ceph_osd_data *osd_data;
 197
 198         osd_data = osd_req_op_data(osd_req, which, cls, request_info);
 199         ceph_osd_data_pagelist_init(osd_data, pagelist);
 200 }
 201
 202 void osd_req_op_cls_request_data_pagelist(
 203                         struct ceph_osd_request *osd_req,
 204                         unsigned int which, struct ceph_pagelist *pagelist)
 205 {
 206         struct ceph_osd_data *osd_data;
 207
 208         osd_data = osd_req_op_data(osd_req, which, cls, request_data);
 209         ceph_osd_data_pagelist_init(osd_data, pagelist);
 210         osd_req->r_ops[which].cls.indata_len += pagelist->length;
 211         osd_req->r_ops[which].indata_len += pagelist->length;
 212 }
 213 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
 214
 215 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
 216                         unsigned int which, struct page **pages, u64 length,
 217                         u32 alignment, bool pages_from_pool, bool own_pages)
 218 {
 219         struct ceph_osd_data *osd_data;
 220
 221         osd_data = osd_req_op_data(osd_req, which, cls, request_data);
 222         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 223                                 pages_from_pool, own_pages);
 224         osd_req->r_ops[which].cls.indata_len += length;
 225         osd_req->r_ops[which].indata_len += length;
 226 }
 227 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
 228
 229 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
 230                         unsigned int which, struct page **pages, u64 length,
 231                         u32 alignment, bool pages_from_pool, bool own_pages)
 232 {
 233         struct ceph_osd_data *osd_data;
 234
 235         osd_data = osd_req_op_data(osd_req, which, cls, response_data);
 236         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 237                                 pages_from_pool, own_pages);
 238 }
 239 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
 240
 241 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
 242 {
 243         switch (osd_data->type) {
 244         case CEPH_OSD_DATA_TYPE_NONE:
 245                 return 0;
 246         case CEPH_OSD_DATA_TYPE_PAGES:
 247                 return osd_data->length;
 248         case CEPH_OSD_DATA_TYPE_PAGELIST:
 249                 return (u64)osd_data->pagelist->length;
 250 #ifdef CONFIG_BLOCK
 251         case CEPH_OSD_DATA_TYPE_BIO:
 252                 return (u64)osd_data->bio_length;
 253 #endif /* CONFIG_BLOCK */
 254         default:
 255                 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
 256                 return 0;
 257         }
 258 }
 259
 260 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
 261 {
 262         if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
 263                 int num_pages;
 264
 265                 num_pages = calc_pages_for((u64)osd_data->alignment,
 266                                                 (u64)osd_data->length);
 267                 ceph_release_page_vector(osd_data->pages, num_pages);
 268         }
 269         ceph_osd_data_init(osd_data);
 270 }
 271
 272 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
 273                         unsigned int which)
 274 {
 275         struct ceph_osd_req_op *op;
 276
 277         BUG_ON(which >= osd_req->r_num_ops);
 278         op = &osd_req->r_ops[which];
 279
 280         switch (op->op) {
 281         case CEPH_OSD_OP_READ:
 282         case CEPH_OSD_OP_WRITE:
 283         case CEPH_OSD_OP_WRITEFULL:
 284                 ceph_osd_data_release(&op->extent.osd_data);
 285                 break;
 286         case CEPH_OSD_OP_CALL:
 287                 ceph_osd_data_release(&op->cls.request_info);
 288                 ceph_osd_data_release(&op->cls.request_data);
 289                 ceph_osd_data_release(&op->cls.response_data);
 290                 break;
 291         case CEPH_OSD_OP_SETXATTR:
 292         case CEPH_OSD_OP_CMPXATTR:
 293                 ceph_osd_data_release(&op->xattr.osd_data);
 294                 break;
 295         case CEPH_OSD_OP_STAT:
 296                 ceph_osd_data_release(&op->raw_data_in);
 297                 break;
 298         default:
 299                 break;
 300         }
 301 }
 302
 303 /*
 304  * Assumes @t is zero-initialized.
 305  */
 306 static void target_init(struct ceph_osd_request_target *t)
 307 {
 308         ceph_oid_init(&t->base_oid);
 309         ceph_oloc_init(&t->base_oloc);
 310         ceph_oid_init(&t->target_oid);
 311         ceph_oloc_init(&t->target_oloc);
 312
 313         ceph_osds_init(&t->acting);
 314         ceph_osds_init(&t->up);
 315         t->size = -1;
 316         t->min_size = -1;
 317
 318         t->osd = CEPH_HOMELESS_OSD;
 319 }
 320
 321 static void target_destroy(struct ceph_osd_request_target *t)
 322 {
 323         ceph_oid_destroy(&t->base_oid);
 324         ceph_oid_destroy(&t->target_oid);
 325 }
 326
 327 /*
 328  * requests
 329  */
 330 static void ceph_osdc_release_request(struct kref *kref)
 331 {
 332         struct ceph_osd_request *req = container_of(kref,
 333                                             struct ceph_osd_request, r_kref);
 334         unsigned int which;
 335
 336         dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
 337              req->r_request, req->r_reply);
 338         WARN_ON(!RB_EMPTY_NODE(&req->r_node));
 339         WARN_ON(!list_empty(&req->r_req_lru_item));
 340         WARN_ON(!list_empty(&req->r_osd_item));
 341         WARN_ON(!list_empty(&req->r_linger_item));
 342         WARN_ON(!list_empty(&req->r_linger_osd_item));
 343         WARN_ON(req->r_osd);
 344
 345         if (req->r_request)
 346                 ceph_msg_put(req->r_request);
 347         if (req->r_reply) {
 348                 ceph_msg_revoke_incoming(req->r_reply);
 349                 ceph_msg_put(req->r_reply);
 350         }
 351
 352         for (which = 0; which < req->r_num_ops; which++)
 353                 osd_req_op_data_release(req, which);
 354
 355         target_destroy(&req->r_t);
 356         ceph_put_snap_context(req->r_snapc);
 357
 358         if (req->r_mempool)
 359                 mempool_free(req, req->r_osdc->req_mempool);
 360         else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
 361                 kmem_cache_free(ceph_osd_request_cache, req);
 362         else
 363                 kfree(req);
 364 }
 365
 366 void ceph_osdc_get_request(struct ceph_osd_request *req)
 367 {
 368         dout("%s %p (was %d)\n", __func__, req,
 369              atomic_read(&req->r_kref.refcount));
 370         kref_get(&req->r_kref);
 371 }
 372 EXPORT_SYMBOL(ceph_osdc_get_request);
 373
 374 void ceph_osdc_put_request(struct ceph_osd_request *req)
 375 {
 376         if (req) {
 377                 dout("%s %p (was %d)\n", __func__, req,
 378                      atomic_read(&req->r_kref.refcount));
 379                 kref_put(&req->r_kref, ceph_osdc_release_request);
 380         }
 381 }
 382 EXPORT_SYMBOL(ceph_osdc_put_request);
 383
 384 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
 385                                                struct ceph_snap_context *snapc,
 386                                                unsigned int num_ops,
 387                                                bool use_mempool,
 388                                                gfp_t gfp_flags)
 389 {
 390         struct ceph_osd_request *req;
 391
 392         if (use_mempool) {
 393                 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
 394                 req = mempool_alloc(osdc->req_mempool, gfp_flags);
 395         } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
 396                 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
 397         } else {
 398                 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
 399                 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
 400                               gfp_flags);
 401         }
 402         if (unlikely(!req))
 403                 return NULL;
 404
 405         /* req only, each op is zeroed in _osd_req_op_init() */
 406         memset(req, 0, sizeof(*req));
 407
 408         req->r_osdc = osdc;
 409         req->r_mempool = use_mempool;
 410         req->r_num_ops = num_ops;
 411         req->r_snapid = CEPH_NOSNAP;
 412         req->r_snapc = ceph_get_snap_context(snapc);
 413
 414         kref_init(&req->r_kref);
 415         init_completion(&req->r_completion);
 416         init_completion(&req->r_safe_completion);
 417         RB_CLEAR_NODE(&req->r_node);
 418         INIT_LIST_HEAD(&req->r_unsafe_item);
 419         INIT_LIST_HEAD(&req->r_linger_item);
 420         INIT_LIST_HEAD(&req->r_linger_osd_item);
 421         INIT_LIST_HEAD(&req->r_req_lru_item);
 422         INIT_LIST_HEAD(&req->r_osd_item);
 423
 424         target_init(&req->r_t);
 425
 426         dout("%s req %p\n", __func__, req);
 427         return req;
 428 }
 429 EXPORT_SYMBOL(ceph_osdc_alloc_request);
 430
 431 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
 432 {
 433         struct ceph_osd_client *osdc = req->r_osdc;
 434         struct ceph_msg *msg;
 435         int msg_size;
 436
 437         WARN_ON(ceph_oid_empty(&req->r_base_oid));
 438
 439         /* create request message */
 440         msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
 441         msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
 442         msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
 443         msg_size += 1 + 8 + 4 + 4; /* pgid */
 444         msg_size += 4 + req->r_base_oid.name_len; /* oid */
 445         msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
 446         msg_size += 8; /* snapid */
 447         msg_size += 8; /* snap_seq */
 448         msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
 449         msg_size += 4; /* retry_attempt */
 450
 451         if (req->r_mempool)
 452                 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
 453         else
 454                 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
 455         if (!msg)
 456                 return -ENOMEM;
 457
 458         memset(msg->front.iov_base, 0, msg->front.iov_len);
 459         req->r_request = msg;
 460
 461         /* create reply message */
 462         msg_size = OSD_OPREPLY_FRONT_LEN;
 463         msg_size += req->r_base_oid.name_len;
 464         msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
 465
 466         if (req->r_mempool)
 467                 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
 468         else
 469                 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
 470         if (!msg)
 471                 return -ENOMEM;
 472
 473         req->r_reply = msg;
 474
 475         return 0;
 476 }
 477 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
 478
 479 static bool osd_req_opcode_valid(u16 opcode)
 480 {
 481         switch (opcode) {
 482 #define GENERATE_CASE(op, opcode, str)  case CEPH_OSD_OP_##op: return true;
 483 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
 484 #undef GENERATE_CASE
 485         default:
 486                 return false;
 487         }
 488 }
 489
 490 /*
 491  * This is an osd op init function for opcodes that have no data or
 492  * other information associated with them.  It also serves as a
 493  * common init routine for all the other init functions, below.
 494  */
 495 static struct ceph_osd_req_op *
 496 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
 497                  u16 opcode, u32 flags)
 498 {
 499         struct ceph_osd_req_op *op;
 500
 501         BUG_ON(which >= osd_req->r_num_ops);
 502         BUG_ON(!osd_req_opcode_valid(opcode));
 503
 504         op = &osd_req->r_ops[which];
 505         memset(op, 0, sizeof (*op));
 506         op->op = opcode;
 507         op->flags = flags;
 508
 509         return op;
 510 }
 511
 512 void osd_req_op_init(struct ceph_osd_request *osd_req,
 513                      unsigned int which, u16 opcode, u32 flags)
 514 {
 515         (void)_osd_req_op_init(osd_req, which, opcode, flags);
 516 }
 517 EXPORT_SYMBOL(osd_req_op_init);
 518
 519 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
 520                                 unsigned int which, u16 opcode,
 521                                 u64 offset, u64 length,
 522                                 u64 truncate_size, u32 truncate_seq)
 523 {
 524         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 525                                                       opcode, 0);
 526         size_t payload_len = 0;
 527
 528         BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
 529                opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
 530                opcode != CEPH_OSD_OP_TRUNCATE);
 531
 532         op->extent.offset = offset;
 533         op->extent.length = length;
 534         op->extent.truncate_size = truncate_size;
 535         op->extent.truncate_seq = truncate_seq;
 536         if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
 537                 payload_len += length;
 538
 539         op->indata_len = payload_len;
 540 }
 541 EXPORT_SYMBOL(osd_req_op_extent_init);
 542
 543 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
 544                                 unsigned int which, u64 length)
 545 {
 546         struct ceph_osd_req_op *op;
 547         u64 previous;
 548
 549         BUG_ON(which >= osd_req->r_num_ops);
 550         op = &osd_req->r_ops[which];
 551         previous = op->extent.length;
 552
 553         if (length == previous)
 554                 return;         /* Nothing to do */
 555         BUG_ON(length > previous);
 556
 557         op->extent.length = length;
 558         op->indata_len -= previous - length;
 559 }
 560 EXPORT_SYMBOL(osd_req_op_extent_update);
 561
 562 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
 563                                 unsigned int which, u64 offset_inc)
 564 {
 565         struct ceph_osd_req_op *op, *prev_op;
 566
 567         BUG_ON(which + 1 >= osd_req->r_num_ops);
 568
 569         prev_op = &osd_req->r_ops[which];
 570         op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
 571         /* dup previous one */
 572         op->indata_len = prev_op->indata_len;
 573         op->outdata_len = prev_op->outdata_len;
 574         op->extent = prev_op->extent;
 575         /* adjust offset */
 576         op->extent.offset += offset_inc;
 577         op->extent.length -= offset_inc;
 578
 579         if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
 580                 op->indata_len -= offset_inc;
 581 }
 582 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
 583
 584 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
 585                         u16 opcode, const char *class, const char *method)
 586 {
 587         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 588                                                       opcode, 0);
 589         struct ceph_pagelist *pagelist;
 590         size_t payload_len = 0;
 591         size_t size;
 592
 593         BUG_ON(opcode != CEPH_OSD_OP_CALL);
 594
 595         pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
 596         BUG_ON(!pagelist);
 597         ceph_pagelist_init(pagelist);
 598
 599         op->cls.class_name = class;
 600         size = strlen(class);
 601         BUG_ON(size > (size_t) U8_MAX);
 602         op->cls.class_len = size;
 603         ceph_pagelist_append(pagelist, class, size);
 604         payload_len += size;
 605
 606         op->cls.method_name = method;
 607         size = strlen(method);
 608         BUG_ON(size > (size_t) U8_MAX);
 609         op->cls.method_len = size;
 610         ceph_pagelist_append(pagelist, method, size);
 611         payload_len += size;
 612
 613         osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
 614
 615         op->indata_len = payload_len;
 616 }
 617 EXPORT_SYMBOL(osd_req_op_cls_init);
 618
 619 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
 620                           u16 opcode, const char *name, const void *value,
 621                           size_t size, u8 cmp_op, u8 cmp_mode)
 622 {
 623         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 624                                                       opcode, 0);
 625         struct ceph_pagelist *pagelist;
 626         size_t payload_len;
 627
 628         BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
 629
 630         pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
 631         if (!pagelist)
 632                 return -ENOMEM;
 633
 634         ceph_pagelist_init(pagelist);
 635
 636         payload_len = strlen(name);
 637         op->xattr.name_len = payload_len;
 638         ceph_pagelist_append(pagelist, name, payload_len);
 639
 640         op->xattr.value_len = size;
 641         ceph_pagelist_append(pagelist, value, size);
 642         payload_len += size;
 643
 644         op->xattr.cmp_op = cmp_op;
 645         op->xattr.cmp_mode = cmp_mode;
 646
 647         ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
 648         op->indata_len = payload_len;
 649         return 0;
 650 }
 651 EXPORT_SYMBOL(osd_req_op_xattr_init);
 652
 653 void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
 654                                 unsigned int which, u16 opcode,
 655                                 u64 cookie, u64 version, int flag)
 656 {
 657         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 658                                                       opcode, 0);
 659
 660         BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
 661
 662         op->watch.cookie = cookie;
 663         op->watch.ver = version;
 664         if (opcode == CEPH_OSD_OP_WATCH && flag)
 665                 op->watch.flag = (u8)1;
 666 }
 667 EXPORT_SYMBOL(osd_req_op_watch_init);
 668
 669 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
 670                                 unsigned int which,
 671                                 u64 expected_object_size,
 672                                 u64 expected_write_size)
 673 {
 674         struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
 675                                                       CEPH_OSD_OP_SETALLOCHINT,
 676                                                       0);
 677
 678         op->alloc_hint.expected_object_size = expected_object_size;
 679         op->alloc_hint.expected_write_size = expected_write_size;
 680
 681         /*
 682          * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
 683          * not worth a feature bit.  Set FAILOK per-op flag to make
 684          * sure older osds don't trip over an unsupported opcode.
 685          */
 686         op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
 687 }
 688 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
 689
 690 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
 691                                 struct ceph_osd_data *osd_data)
 692 {
 693         u64 length = ceph_osd_data_length(osd_data);
 694
 695         if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
 696                 BUG_ON(length > (u64) SIZE_MAX);
 697                 if (length)
 698                         ceph_msg_data_add_pages(msg, osd_data->pages,
 699                                         length, osd_data->alignment);
 700         } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
 701                 BUG_ON(!length);
 702                 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
 703 #ifdef CONFIG_BLOCK
 704         } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
 705                 ceph_msg_data_add_bio(msg, osd_data->bio, length);
 706 #endif
 707         } else {
 708                 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
 709         }
 710 }
 711
 712 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
 713                              const struct ceph_osd_req_op *src)
 714 {
 715         if (WARN_ON(!osd_req_opcode_valid(src->op))) {
 716                 pr_err("unrecognized osd opcode %d\n", src->op);
 717
 718                 return 0;
 719         }
 720
 721         switch (src->op) {
 722         case CEPH_OSD_OP_STAT:
 723                 break;
 724         case CEPH_OSD_OP_READ:
 725         case CEPH_OSD_OP_WRITE:
 726         case CEPH_OSD_OP_WRITEFULL:
 727         case CEPH_OSD_OP_ZERO:
 728         case CEPH_OSD_OP_TRUNCATE:
 729                 dst->extent.offset = cpu_to_le64(src->extent.offset);
 730                 dst->extent.length = cpu_to_le64(src->extent.length);
 731                 dst->extent.truncate_size =
 732                         cpu_to_le64(src->extent.truncate_size);
 733                 dst->extent.truncate_seq =
 734                         cpu_to_le32(src->extent.truncate_seq);
 735                 break;
 736         case CEPH_OSD_OP_CALL:
 737                 dst->cls.class_len = src->cls.class_len;
 738                 dst->cls.method_len = src->cls.method_len;
 739                 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
 740                 break;
 741         case CEPH_OSD_OP_STARTSYNC:
 742                 break;
 743         case CEPH_OSD_OP_NOTIFY_ACK:
 744         case CEPH_OSD_OP_WATCH:
 745                 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
 746                 dst->watch.ver = cpu_to_le64(src->watch.ver);
 747                 dst->watch.flag = src->watch.flag;
 748                 break;
 749         case CEPH_OSD_OP_SETALLOCHINT:
 750                 dst->alloc_hint.expected_object_size =
 751                     cpu_to_le64(src->alloc_hint.expected_object_size);
 752                 dst->alloc_hint.expected_write_size =
 753                     cpu_to_le64(src->alloc_hint.expected_write_size);
 754                 break;
 755         case CEPH_OSD_OP_SETXATTR:
 756         case CEPH_OSD_OP_CMPXATTR:
 757                 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
 758                 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
 759                 dst->xattr.cmp_op = src->xattr.cmp_op;
 760                 dst->xattr.cmp_mode = src->xattr.cmp_mode;
 761                 break;
 762         case CEPH_OSD_OP_CREATE:
 763         case CEPH_OSD_OP_DELETE:
 764                 break;
 765         default:
 766                 pr_err("unsupported osd opcode %s\n",
 767                         ceph_osd_op_name(src->op));
 768                 WARN_ON(1);
 769
 770                 return 0;
 771         }
 772
 773         dst->op = cpu_to_le16(src->op);
 774         dst->flags = cpu_to_le32(src->flags);
 775         dst->payload_len = cpu_to_le32(src->indata_len);
 776
 777         return src->indata_len;
 778 }
 779
 780 /*
 781  * build new request AND message, calculate layout, and adjust file
 782  * extent as needed.
 783  *
 784  * if the file was recently truncated, we include information about its
 785  * old and new size so that the object can be updated appropriately.  (we
 786  * avoid synchronously deleting truncated objects because it's slow.)
 787  *
 788  * if @do_sync, include a 'startsync' command so that the osd will flush
 789  * data quickly.
 790  */
 791 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
 792                                                struct ceph_file_layout *layout,
 793                                                struct ceph_vino vino,
 794                                                u64 off, u64 *plen,
 795                                                unsigned int which, int num_ops,
 796                                                int opcode, int flags,
 797                                                struct ceph_snap_context *snapc,
 798                                                u32 truncate_seq,
 799                                                u64 truncate_size,
 800                                                bool use_mempool)
 801 {
 802         struct ceph_osd_request *req;
 803         u64 objnum = 0;
 804         u64 objoff = 0;
 805         u64 objlen = 0;
 806         int r;
 807
 808         BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
 809                opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
 810                opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
 811
 812         req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
 813                                         GFP_NOFS);
 814         if (!req) {
 815                 r = -ENOMEM;
 816                 goto fail;
 817         }
 818
 819         /* calculate max write size */
 820         r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
 821         if (r)
 822                 goto fail;
 823
 824         if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
 825                 osd_req_op_init(req, which, opcode, 0);
 826         } else {
 827                 u32 object_size = le32_to_cpu(layout->fl_object_size);
 828                 u32 object_base = off - objoff;
 829                 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
 830                         if (truncate_size <= object_base) {
 831                                 truncate_size = 0;
 832                         } else {
 833                                 truncate_size -= object_base;
 834                                 if (truncate_size > object_size)
 835                                         truncate_size = object_size;
 836                         }
 837                 }
 838                 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
 839                                        truncate_size, truncate_seq);
 840         }
 841
 842         req->r_flags = flags;
 843         req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
 844         ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
 845
 846         req->r_snapid = vino.snap;
 847         if (flags & CEPH_OSD_FLAG_WRITE)
 848                 req->r_data_offset = off;
 849
 850         r = ceph_osdc_alloc_messages(req, GFP_NOFS);
 851         if (r)
 852                 goto fail;
 853
 854         return req;
 855
 856 fail:
 857         ceph_osdc_put_request(req);
 858         return ERR_PTR(r);
 859 }
 860 EXPORT_SYMBOL(ceph_osdc_new_request);
 861
 862 /*
 863  * We keep osd requests in an rbtree, sorted by ->r_tid.
 864  */
 865 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
 866
 867 static struct ceph_osd_request *
 868 __lookup_request_ge(struct ceph_osd_client *osdc,
 869                     u64 tid)
 870 {
 871         struct ceph_osd_request *req;
 872         struct rb_node *n = osdc->requests.rb_node;
 873
 874         while (n) {
 875                 req = rb_entry(n, struct ceph_osd_request, r_node);
 876                 if (tid < req->r_tid) {
 877                         if (!n->rb_left)
 878                                 return req;
 879                         n = n->rb_left;
 880                 } else if (tid > req->r_tid) {
 881                         n = n->rb_right;
 882                 } else {
 883                         return req;
 884                 }
 885         }
 886         return NULL;
 887 }
 888
 889 static void __kick_linger_request(struct ceph_osd_request *req)
 890 {
 891         struct ceph_osd_client *osdc = req->r_osdc;
 892         struct ceph_osd *osd = req->r_osd;
 893
 894         /*
 895          * Linger requests need to be resent with a new tid to avoid
 896          * the dup op detection logic on the OSDs.  Achieve this with
 897          * a re-register dance instead of open-coding.
 898          */
 899         ceph_osdc_get_request(req);
 900         if (!list_empty(&req->r_linger_item))
 901                 __unregister_linger_request(osdc, req);
 902         else
 903                 __unregister_request(osdc, req);
 904         __register_request(osdc, req);
 905         ceph_osdc_put_request(req);
 906
 907         /*
 908          * Unless request has been registered as both normal and
 909          * lingering, __unregister{,_linger}_request clears r_osd.
 910          * However, here we need to preserve r_osd to make sure we
 911          * requeue on the same OSD.
 912          */
 913         WARN_ON(req->r_osd || !osd);
 914         req->r_osd = osd;
 915
 916         dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
 917         __enqueue_request(req);
 918 }
 919
 920 /*
 921  * Resubmit requests pending on the given osd.
 922  */
 923 static void __kick_osd_requests(struct ceph_osd_client *osdc,
 924                                 struct ceph_osd *osd)
 925 {
 926         struct ceph_osd_request *req, *nreq;
 927         LIST_HEAD(resend);
 928         LIST_HEAD(resend_linger);
 929         int err;
 930
 931         dout("%s osd%d\n", __func__, osd->o_osd);
 932         err = __reset_osd(osdc, osd);
 933         if (err)
 934                 return;
 935
 936         /*
 937          * Build up a list of requests to resend by traversing the
 938          * osd's list of requests.  Requests for a given object are
 939          * sent in tid order, and that is also the order they're
 940          * kept on this list.  Therefore all requests that are in
 941          * flight will be found first, followed by all requests that
 942          * have not yet been sent.  And to resend requests while
 943          * preserving this order we will want to put any sent
 944          * requests back on the front of the osd client's unsent
 945          * list.
 946          *
 947          * So we build a separate ordered list of already-sent
 948          * requests for the affected osd and splice it onto the
 949          * front of the osd client's unsent list.  Once we've seen a
 950          * request that has not yet been sent we're done.  Those
 951          * requests are already sitting right where they belong.
 952          */
 953         list_for_each_entry(req, &osd->o_requests, r_osd_item) {
 954                 if (!req->r_sent)
 955                         break;
 956
 957                 if (!req->r_linger) {
 958                         dout("%s requeueing %p tid %llu\n", __func__, req,
 959                              req->r_tid);
 960                         list_move_tail(&req->r_req_lru_item, &resend);
 961                         req->r_flags |= CEPH_OSD_FLAG_RETRY;
 962                 } else {
 963                         list_move_tail(&req->r_req_lru_item, &resend_linger);
 964                 }
 965         }
 966         list_splice(&resend, &osdc->req_unsent);
 967
 968         /*
 969          * Both registered and not yet registered linger requests are
 970          * enqueued with a new tid on the same OSD.  We add/move them
 971          * to req_unsent/o_requests at the end to keep things in tid
 972          * order.
 973          */
 974         list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
 975                                  r_linger_osd_item) {
 976                 WARN_ON(!list_empty(&req->r_req_lru_item));
 977                 __kick_linger_request(req);
 978         }
 979
 980         list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
 981                 __kick_linger_request(req);
 982 }
 983
 984 /*
 985  * If the osd connection drops, we need to resubmit all requests.
 986  */
 987 static void osd_reset(struct ceph_connection *con)
 988 {
 989         struct ceph_osd *osd = con->private;
 990         struct ceph_osd_client *osdc;
 991
 992         if (!osd)
 993                 return;
 994         dout("osd_reset osd%d\n", osd->o_osd);
 995         osdc = osd->o_osdc;
 996         down_read(&osdc->map_sem);
 997         mutex_lock(&osdc->request_mutex);
 998         __kick_osd_requests(osdc, osd);
 999         __send_queued(osdc);
1000         mutex_unlock(&osdc->request_mutex);
1001         up_read(&osdc->map_sem);
1002 }
1003
1004 /*
1005  * Track open sessions with osds.
1006  */
1007 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1008 {
1009         struct ceph_osd *osd;
1010
1011         osd = kzalloc(sizeof(*osd), GFP_NOFS);
1012         if (!osd)
1013                 return NULL;
1014
1015         atomic_set(&osd->o_ref, 1);
1016         osd->o_osdc = osdc;
1017         osd->o_osd = onum;
1018         RB_CLEAR_NODE(&osd->o_node);
1019         INIT_LIST_HEAD(&osd->o_requests);
1020         INIT_LIST_HEAD(&osd->o_linger_requests);
1021         INIT_LIST_HEAD(&osd->o_osd_lru);
1022         osd->o_incarnation = 1;
1023
1024         ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1025
1026         INIT_LIST_HEAD(&osd->o_keepalive_item);
1027         return osd;
1028 }
1029
1030 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1031 {
1032         if (atomic_inc_not_zero(&osd->o_ref)) {
1033                 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1034                      atomic_read(&osd->o_ref));
1035                 return osd;
1036         } else {
1037                 dout("get_osd %p FAIL\n", osd);
1038                 return NULL;
1039         }
1040 }
1041
1042 static void put_osd(struct ceph_osd *osd)
1043 {
1044         dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1045              atomic_read(&osd->o_ref) - 1);
1046         if (atomic_dec_and_test(&osd->o_ref)) {
1047                 if (osd->o_auth.authorizer)
1048                         ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1049                 kfree(osd);
1050         }
1051 }
1052
1053 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1054
1055 /*
1056  * remove an osd from our map
1057  */
1058 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1059 {
1060         dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1061         WARN_ON(!list_empty(&osd->o_requests));
1062         WARN_ON(!list_empty(&osd->o_linger_requests));
1063
1064         list_del_init(&osd->o_osd_lru);
1065         erase_osd(&osdc->osds, osd);
1066 }
1067
1068 static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1069 {
1070         dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1071
1072         if (!RB_EMPTY_NODE(&osd->o_node)) {
1073                 ceph_con_close(&osd->o_con);
1074                 __remove_osd(osdc, osd);
1075                 put_osd(osd);
1076         }
1077 }
1078
1079 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1080                               struct ceph_osd *osd)
1081 {
1082         dout("%s %p\n", __func__, osd);
1083         BUG_ON(!list_empty(&osd->o_osd_lru));
1084
1085         list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1086         osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1087 }
1088
1089 static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1090                                   struct ceph_osd *osd)
1091 {
1092         dout("%s %p\n", __func__, osd);
1093
1094         if (list_empty(&osd->o_requests) &&
1095             list_empty(&osd->o_linger_requests))
1096                 __move_osd_to_lru(osdc, osd);
1097 }
1098
1099 static void __remove_osd_from_lru(struct ceph_osd *osd)
1100 {
1101         dout("__remove_osd_from_lru %p\n", osd);
1102         if (!list_empty(&osd->o_osd_lru))
1103                 list_del_init(&osd->o_osd_lru);
1104 }
1105
1106 /*
1107  * reset osd connect
1108  */
1109 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1110 {
1111         struct ceph_entity_addr *peer_addr;
1112
1113         dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1114         if (list_empty(&osd->o_requests) &&
1115             list_empty(&osd->o_linger_requests)) {
1116                 remove_osd(osdc, osd);
1117                 return -ENODEV;
1118         }
1119
1120         peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1121         if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1122                         !ceph_con_opened(&osd->o_con)) {
1123                 struct ceph_osd_request *req;
1124
1125                 dout("osd addr hasn't changed and connection never opened, "
1126                      "letting msgr retry\n");
1127                 /* touch each r_stamp for handle_timeout()'s benfit */
1128                 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1129                         req->r_stamp = jiffies;
1130
1131                 return -EAGAIN;
1132         }
1133
1134         ceph_con_close(&osd->o_con);
1135         ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1136         osd->o_incarnation++;
1137
1138         return 0;
1139 }
1140
1141 static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1142 {
1143         schedule_delayed_work(&osdc->timeout_work,
1144                               osdc->client->options->osd_keepalive_timeout);
1145 }
1146
1147 static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1148 {
1149         cancel_delayed_work(&osdc->timeout_work);
1150 }
1151
1152 /*
1153  * Register request, assign tid.  If this is the first request, set up
1154  * the timeout event.
1155  */
1156 static void __register_request(struct ceph_osd_client *osdc,
1157                                struct ceph_osd_request *req)
1158 {
1159         req->r_tid = ++osdc->last_tid;
1160         req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1161         dout("__register_request %p tid %lld\n", req, req->r_tid);
1162         insert_request(&osdc->requests, req);
1163         ceph_osdc_get_request(req);
1164         osdc->num_requests++;
1165         if (osdc->num_requests == 1) {
1166                 dout(" first request, scheduling timeout\n");
1167                 __schedule_osd_timeout(osdc);
1168         }
1169 }
1170
1171 /*
1172  * called under osdc->request_mutex
1173  */
1174 static void __unregister_request(struct ceph_osd_client *osdc,
1175                                  struct ceph_osd_request *req)
1176 {
1177         if (RB_EMPTY_NODE(&req->r_node)) {
1178                 dout("__unregister_request %p tid %lld not registered\n",
1179                         req, req->r_tid);
1180                 return;
1181         }
1182
1183         dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1184         erase_request(&osdc->requests, req);
1185         osdc->num_requests--;
1186
1187         if (req->r_osd) {
1188                 /* make sure the original request isn't in flight. */
1189                 ceph_msg_revoke(req->r_request);
1190
1191                 list_del_init(&req->r_osd_item);
1192                 maybe_move_osd_to_lru(osdc, req->r_osd);
1193                 if (list_empty(&req->r_linger_osd_item))
1194                         req->r_osd = NULL;
1195         }
1196
1197         list_del_init(&req->r_req_lru_item);
1198         ceph_osdc_put_request(req);
1199
1200         if (osdc->num_requests == 0) {
1201                 dout(" no requests, canceling timeout\n");
1202                 __cancel_osd_timeout(osdc);
1203         }
1204 }
1205
1206 /*
1207  * Cancel a previously queued request message
1208  */
1209 static void __cancel_request(struct ceph_osd_request *req)
1210 {
1211         if (req->r_sent && req->r_osd) {
1212                 ceph_msg_revoke(req->r_request);
1213                 req->r_sent = 0;
1214         }
1215 }
1216
1217 static void __register_linger_request(struct ceph_osd_client *osdc,
1218                                     struct ceph_osd_request *req)
1219 {
1220         dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1221         WARN_ON(!req->r_linger);
1222
1223         ceph_osdc_get_request(req);
1224         list_add_tail(&req->r_linger_item, &osdc->req_linger);
1225         if (req->r_osd)
1226                 list_add_tail(&req->r_linger_osd_item,
1227                               &req->r_osd->o_linger_requests);
1228 }
1229
1230 static void __unregister_linger_request(struct ceph_osd_client *osdc,
1231                                         struct ceph_osd_request *req)
1232 {
1233         WARN_ON(!req->r_linger);
1234
1235         if (list_empty(&req->r_linger_item)) {
1236                 dout("%s %p tid %llu not registered\n", __func__, req,
1237                      req->r_tid);
1238                 return;
1239         }
1240
1241         dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1242         list_del_init(&req->r_linger_item);
1243
1244         if (req->r_osd) {
1245                 list_del_init(&req->r_linger_osd_item);
1246                 maybe_move_osd_to_lru(osdc, req->r_osd);
1247                 if (list_empty(&req->r_osd_item))
1248                         req->r_osd = NULL;
1249         }
1250         ceph_osdc_put_request(req);
1251 }
1252
1253 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1254                                   struct ceph_osd_request *req)
1255 {
1256         if (!req->r_linger) {
1257                 dout("set_request_linger %p\n", req);
1258                 req->r_linger = 1;
1259         }
1260 }
1261 EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1262
1263 static bool __pool_full(struct ceph_pg_pool_info *pi)
1264 {
1265         return pi->flags & CEPH_POOL_FLAG_FULL;
1266 }
1267
1268 /*
1269  * Returns whether a request should be blocked from being sent
1270  * based on the current osdmap and osd_client settings.
1271  *
1272  * Caller should hold map_sem for read.
1273  */
1274 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1275                                     const struct ceph_osd_request_target *t,
1276                                     struct ceph_pg_pool_info *pi)
1277 {
1278         bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1279         bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1280                        ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1281                        __pool_full(pi);
1282
1283         WARN_ON(pi->id != t->base_oloc.pool);
1284         return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
1285                (t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
1286 }
1287
1288 enum calc_target_result {
1289         CALC_TARGET_NO_ACTION = 0,
1290         CALC_TARGET_NEED_RESEND,
1291         CALC_TARGET_POOL_DNE,
1292 };
1293
1294 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1295                                            struct ceph_osd_request_target *t,
1296                                            u32 *last_force_resend,
1297                                            bool any_change)
1298 {
1299         struct ceph_pg_pool_info *pi;
1300         struct ceph_pg pgid, last_pgid;
1301         struct ceph_osds up, acting;
1302         bool force_resend = false;
1303         bool need_check_tiering = false;
1304         bool need_resend = false;
1305         bool sort_bitwise = ceph_osdmap_flag(osdc->osdmap,
1306                                              CEPH_OSDMAP_SORTBITWISE);
1307         enum calc_target_result ct_res;
1308         int ret;
1309
1310         pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1311         if (!pi) {
1312                 t->osd = CEPH_HOMELESS_OSD;
1313                 ct_res = CALC_TARGET_POOL_DNE;
1314                 goto out;
1315         }
1316
1317         if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1318                 if (last_force_resend &&
1319                     *last_force_resend < pi->last_force_request_resend) {
1320                         *last_force_resend = pi->last_force_request_resend;
1321                         force_resend = true;
1322                 } else if (!last_force_resend) {
1323                         force_resend = true;
1324                 }
1325         }
1326         if (ceph_oid_empty(&t->target_oid) || force_resend) {
1327                 ceph_oid_copy(&t->target_oid, &t->base_oid);
1328                 need_check_tiering = true;
1329         }
1330         if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
1331                 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1332                 need_check_tiering = true;
1333         }
1334
1335         if (need_check_tiering &&
1336             (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1337                 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1338                         t->target_oloc.pool = pi->read_tier;
1339                 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1340                         t->target_oloc.pool = pi->write_tier;
1341         }
1342
1343         ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
1344                                         &t->target_oloc, &pgid);
1345         if (ret) {
1346                 WARN_ON(ret != -ENOENT);
1347                 t->osd = CEPH_HOMELESS_OSD;
1348                 ct_res = CALC_TARGET_POOL_DNE;
1349                 goto out;
1350         }
1351         last_pgid.pool = pgid.pool;
1352         last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1353
1354         ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
1355         if (any_change &&
1356             ceph_is_new_interval(&t->acting,
1357                                  &acting,
1358                                  &t->up,
1359                                  &up,
1360                                  t->size,
1361                                  pi->size,
1362                                  t->min_size,
1363                                  pi->min_size,
1364                                  t->pg_num,
1365                                  pi->pg_num,
1366                                  t->sort_bitwise,
1367                                  sort_bitwise,
1368                                  &last_pgid))
1369                 force_resend = true;
1370
1371         if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1372                 t->paused = false;
1373                 need_resend = true;
1374         }
1375
1376         if (ceph_pg_compare(&t->pgid, &pgid) ||
1377             ceph_osds_changed(&t->acting, &acting, any_change) ||
1378             force_resend) {
1379                 t->pgid = pgid; /* struct */
1380                 ceph_osds_copy(&t->acting, &acting);
1381                 ceph_osds_copy(&t->up, &up);
1382                 t->size = pi->size;
1383                 t->min_size = pi->min_size;
1384                 t->pg_num = pi->pg_num;
1385                 t->pg_num_mask = pi->pg_num_mask;
1386                 t->sort_bitwise = sort_bitwise;
1387
1388                 t->osd = acting.primary;
1389                 need_resend = true;
1390         }
1391
1392         ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
1393 out:
1394         dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1395         return ct_res;
1396 }
1397
1398 static void __enqueue_request(struct ceph_osd_request *req)
1399 {
1400         struct ceph_osd_client *osdc = req->r_osdc;
1401
1402         dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1403              req->r_osd ? req->r_osd->o_osd : -1);
1404
1405         if (req->r_osd) {
1406                 __remove_osd_from_lru(req->r_osd);
1407                 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1408                 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1409         } else {
1410                 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1411         }
1412 }
1413
1414 /*
1415  * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1416  * (as needed), and set the request r_osd appropriately.  If there is
1417  * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1418  * (unsent, homeless) or leave on in-flight lru.
1419  *
1420  * Return 0 if unchanged, 1 if changed, or negative on error.
1421  *
1422  * Caller should hold map_sem for read and request_mutex.
1423  */
1424 static int __map_request(struct ceph_osd_client *osdc,
1425                          struct ceph_osd_request *req, int force_resend)
1426 {
1427         enum calc_target_result ct_res;
1428         int err;
1429
1430         dout("map_request %p tid %lld\n", req, req->r_tid);
1431
1432         ct_res = calc_target(osdc, &req->r_t, NULL, force_resend);
1433         switch (ct_res) {
1434         case CALC_TARGET_POOL_DNE:
1435                 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1436                 return -EIO;
1437         case CALC_TARGET_NO_ACTION:
1438                 return 0;  /* no change */
1439         default:
1440                 BUG_ON(ct_res != CALC_TARGET_NEED_RESEND);
1441         }
1442
1443         dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1444              req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, req->r_t.osd,
1445              req->r_osd ? req->r_osd->o_osd : -1);
1446
1447         if (req->r_osd) {
1448                 __cancel_request(req);
1449                 list_del_init(&req->r_osd_item);
1450                 list_del_init(&req->r_linger_osd_item);
1451                 req->r_osd = NULL;
1452         }
1453
1454         req->r_osd = lookup_osd(&osdc->osds, req->r_t.osd);
1455         if (!req->r_osd && req->r_t.osd >= 0) {
1456                 err = -ENOMEM;
1457                 req->r_osd = create_osd(osdc, req->r_t.osd);
1458                 if (!req->r_osd) {
1459                         list_move(&req->r_req_lru_item, &osdc->req_notarget);
1460                         goto out;
1461                 }
1462
1463                 dout("map_request osd %p is osd%d\n", req->r_osd,
1464                      req->r_osd->o_osd);
1465                 insert_osd(&osdc->osds, req->r_osd);
1466
1467                 ceph_con_open(&req->r_osd->o_con,
1468                               CEPH_ENTITY_TYPE_OSD, req->r_osd->o_osd,
1469                               &osdc->osdmap->osd_addr[req->r_osd->o_osd]);
1470         }
1471
1472         __enqueue_request(req);
1473         err = 1;   /* osd or pg changed */
1474
1475 out:
1476         return err;
1477 }
1478
1479 static void setup_request_data(struct ceph_osd_request *req,
1480                                struct ceph_msg *msg)
1481 {
1482         u32 data_len = 0;
1483         int i;
1484
1485         if (!list_empty(&msg->data))
1486                 return;
1487
1488         WARN_ON(msg->data_length);
1489         for (i = 0; i < req->r_num_ops; i++) {
1490                 struct ceph_osd_req_op *op = &req->r_ops[i];
1491
1492                 switch (op->op) {
1493                 /* request */
1494                 case CEPH_OSD_OP_WRITE:
1495                 case CEPH_OSD_OP_WRITEFULL:
1496                         WARN_ON(op->indata_len != op->extent.length);
1497                         ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1498                         break;
1499                 case CEPH_OSD_OP_SETXATTR:
1500                 case CEPH_OSD_OP_CMPXATTR:
1501                         WARN_ON(op->indata_len != op->xattr.name_len +
1502                                                   op->xattr.value_len);
1503                         ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1504                         break;
1505
1506                 /* reply */
1507                 case CEPH_OSD_OP_STAT:
1508                         ceph_osdc_msg_data_add(req->r_reply,
1509                                                &op->raw_data_in);
1510                         break;
1511                 case CEPH_OSD_OP_READ:
1512                         ceph_osdc_msg_data_add(req->r_reply,
1513                                                &op->extent.osd_data);
1514                         break;
1515
1516                 /* both */
1517                 case CEPH_OSD_OP_CALL:
1518                         WARN_ON(op->indata_len != op->cls.class_len +
1519                                                   op->cls.method_len +
1520                                                   op->cls.indata_len);
1521                         ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1522                         /* optional, can be NONE */
1523                         ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1524                         /* optional, can be NONE */
1525                         ceph_osdc_msg_data_add(req->r_reply,
1526                                                &op->cls.response_data);
1527                         break;
1528                 }
1529
1530                 data_len += op->indata_len;
1531         }
1532
1533         WARN_ON(data_len != msg->data_length);
1534 }
1535
1536 static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
1537 {
1538         void *p = msg->front.iov_base;
1539         void *const end = p + msg->front_alloc_len;
1540         u32 data_len = 0;
1541         int i;
1542
1543         if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1544                 /* snapshots aren't writeable */
1545                 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1546         } else {
1547                 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1548                         req->r_data_offset || req->r_snapc);
1549         }
1550
1551         setup_request_data(req, msg);
1552
1553         ceph_encode_32(&p, 1); /* client_inc, always 1 */
1554         ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1555         ceph_encode_32(&p, req->r_flags);
1556         ceph_encode_timespec(p, &req->r_mtime);
1557         p += sizeof(struct ceph_timespec);
1558         /* aka reassert_version */
1559         memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
1560         p += sizeof(req->r_replay_version);
1561
1562         /* oloc */
1563         ceph_encode_8(&p, 4);
1564         ceph_encode_8(&p, 4);
1565         ceph_encode_32(&p, 8 + 4 + 4);
1566         ceph_encode_64(&p, req->r_t.target_oloc.pool);
1567         ceph_encode_32(&p, -1); /* preferred */
1568         ceph_encode_32(&p, 0); /* key len */
1569
1570         /* pgid */
1571         ceph_encode_8(&p, 1);
1572         ceph_encode_64(&p, req->r_t.pgid.pool);
1573         ceph_encode_32(&p, req->r_t.pgid.seed);
1574         ceph_encode_32(&p, -1); /* preferred */
1575
1576         /* oid */
1577         ceph_encode_32(&p, req->r_t.target_oid.name_len);
1578         memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
1579         p += req->r_t.target_oid.name_len;
1580
1581         /* ops, can imply data */
1582         ceph_encode_16(&p, req->r_num_ops);
1583         for (i = 0; i < req->r_num_ops; i++) {
1584                 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1585                 p += sizeof(struct ceph_osd_op);
1586         }
1587
1588         ceph_encode_64(&p, req->r_snapid); /* snapid */
1589         if (req->r_snapc) {
1590                 ceph_encode_64(&p, req->r_snapc->seq);
1591                 ceph_encode_32(&p, req->r_snapc->num_snaps);
1592                 for (i = 0; i < req->r_snapc->num_snaps; i++)
1593                         ceph_encode_64(&p, req->r_snapc->snaps[i]);
1594         } else {
1595                 ceph_encode_64(&p, 0); /* snap_seq */
1596                 ceph_encode_32(&p, 0); /* snaps len */
1597         }
1598
1599         ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
1600
1601         BUG_ON(p > end);
1602         msg->front.iov_len = p - msg->front.iov_base;
1603         msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
1604         msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
1605         msg->hdr.data_len = cpu_to_le32(data_len);
1606         /*
1607          * The header "data_off" is a hint to the receiver allowing it
1608          * to align received data into its buffers such that there's no
1609          * need to re-copy it before writing it to disk (direct I/O).
1610          */
1611         msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
1612
1613         dout("%s req %p oid %*pE oid_len %d front %zu data %u\n", __func__,
1614              req, req->r_t.target_oid.name_len, req->r_t.target_oid.name,
1615              req->r_t.target_oid.name_len, msg->front.iov_len, data_len);
1616 }
1617
1618 /*
1619  * @req has to be assigned a tid and registered.
1620  */
1621 static void send_request(struct ceph_osd_request *req)
1622 {
1623         struct ceph_osd *osd = req->r_osd;
1624
1625         WARN_ON(osd->o_osd != req->r_t.osd);
1626
1627         req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
1628         if (req->r_attempts)
1629                 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1630         else
1631                 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
1632
1633         encode_request(req, req->r_request);
1634
1635         dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n",
1636              __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
1637              req->r_t.osd, req->r_flags, req->r_attempts);
1638
1639         req->r_t.paused = false;
1640         req->r_stamp = jiffies;
1641         req->r_attempts++;
1642
1643         req->r_sent = osd->o_incarnation;
1644         req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1645         ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
1646 }
1647
1648 /*
1649  * Send any requests in the queue (req_unsent).
1650  */
1651 static void __send_queued(struct ceph_osd_client *osdc)
1652 {
1653         struct ceph_osd_request *req, *tmp;
1654
1655         dout("__send_queued\n");
1656         list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) {
1657                 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1658                 send_request(req);
1659         }
1660 }
1661
1662 /*
1663  * Caller should hold map_sem for read and request_mutex.
1664  */
1665 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1666                                      struct ceph_osd_request *req,
1667                                      bool nofail)
1668 {
1669         int rc;
1670
1671         __register_request(osdc, req);
1672         req->r_sent = 0;
1673         req->r_got_reply = 0;
1674         rc = __map_request(osdc, req, 0);
1675         if (rc < 0) {
1676                 if (nofail) {
1677                         dout("osdc_start_request failed map, "
1678                                 " will retry %lld\n", req->r_tid);
1679                         rc = 0;
1680                 } else {
1681                         __unregister_request(osdc, req);
1682                 }
1683                 return rc;
1684         }
1685
1686         if (req->r_osd == NULL) {
1687                 dout("send_request %p no up osds in pg\n", req);
1688                 ceph_monc_request_next_osdmap(&osdc->client->monc);
1689         } else {
1690                 __send_queued(osdc);
1691         }
1692
1693         return 0;
1694 }
1695
1696 static void __complete_request(struct ceph_osd_request *req)
1697 {
1698         if (req->r_callback)
1699                 req->r_callback(req);
1700         else
1701                 complete_all(&req->r_completion);
1702 }
1703
1704 /*
1705  * Timeout callback, called every N seconds when 1 or more osd
1706  * requests has been active for more than N seconds.  When this
1707  * happens, we ping all OSDs with requests who have timed out to
1708  * ensure any communications channel reset is detected.  Reset the
1709  * request timeouts another N seconds in the future as we go.
1710  * Reschedule the timeout event another N seconds in future (unless
1711  * there are no open requests).
1712  */
1713 static void handle_timeout(struct work_struct *work)
1714 {
1715         struct ceph_osd_client *osdc =
1716                 container_of(work, struct ceph_osd_client, timeout_work.work);
1717         struct ceph_options *opts = osdc->client->options;
1718         struct ceph_osd_request *req;
1719         struct ceph_osd *osd;
1720         struct list_head slow_osds;
1721         dout("timeout\n");
1722         down_read(&osdc->map_sem);
1723
1724         ceph_monc_request_next_osdmap(&osdc->client->monc);
1725
1726         mutex_lock(&osdc->request_mutex);
1727
1728         /*
1729          * ping osds that are a bit slow.  this ensures that if there
1730          * is a break in the TCP connection we will notice, and reopen
1731          * a connection with that osd (from the fault callback).
1732          */
1733         INIT_LIST_HEAD(&slow_osds);
1734         list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1735                 if (time_before(jiffies,
1736                                 req->r_stamp + opts->osd_keepalive_timeout))
1737                         break;
1738
1739                 osd = req->r_osd;
1740                 BUG_ON(!osd);
1741                 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1742                      req->r_tid, osd->o_osd);
1743                 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1744         }
1745         while (!list_empty(&slow_osds)) {
1746                 osd = list_entry(slow_osds.next, struct ceph_osd,
1747                                  o_keepalive_item);
1748                 list_del_init(&osd->o_keepalive_item);
1749                 ceph_con_keepalive(&osd->o_con);
1750         }
1751
1752         __schedule_osd_timeout(osdc);
1753         __send_queued(osdc);
1754         mutex_unlock(&osdc->request_mutex);
1755         up_read(&osdc->map_sem);
1756 }
1757
1758 static void handle_osds_timeout(struct work_struct *work)
1759 {
1760         struct ceph_osd_client *osdc =
1761                 container_of(work, struct ceph_osd_client,
1762                              osds_timeout_work.work);
1763         unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
1764         struct ceph_osd *osd, *nosd;
1765
1766         dout("%s osdc %p\n", __func__, osdc);
1767         down_read(&osdc->map_sem);
1768         mutex_lock(&osdc->request_mutex);
1769
1770         list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1771                 if (time_before(jiffies, osd->lru_ttl))
1772                         break;
1773
1774                 remove_osd(osdc, osd);
1775         }
1776
1777         mutex_unlock(&osdc->request_mutex);
1778         up_read(&osdc->map_sem);
1779         schedule_delayed_work(&osdc->osds_timeout_work,
1780                               round_jiffies_relative(delay));
1781 }
1782
1783 static int ceph_oloc_decode(void **p, void *end,
1784                             struct ceph_object_locator *oloc)
1785 {
1786         u8 struct_v, struct_cv;
1787         u32 len;
1788         void *struct_end;
1789         int ret = 0;
1790
1791         ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1792         struct_v = ceph_decode_8(p);
1793         struct_cv = ceph_decode_8(p);
1794         if (struct_v < 3) {
1795                 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1796                         struct_v, struct_cv);
1797                 goto e_inval;
1798         }
1799         if (struct_cv > 6) {
1800                 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1801                         struct_v, struct_cv);
1802                 goto e_inval;
1803         }
1804         len = ceph_decode_32(p);
1805         ceph_decode_need(p, end, len, e_inval);
1806         struct_end = *p + len;
1807
1808         oloc->pool = ceph_decode_64(p);
1809         *p += 4; /* skip preferred */
1810
1811         len = ceph_decode_32(p);
1812         if (len > 0) {
1813                 pr_warn("ceph_object_locator::key is set\n");
1814                 goto e_inval;
1815         }
1816
1817         if (struct_v >= 5) {
1818                 len = ceph_decode_32(p);
1819                 if (len > 0) {
1820                         pr_warn("ceph_object_locator::nspace is set\n");
1821                         goto e_inval;
1822                 }
1823         }
1824
1825         if (struct_v >= 6) {
1826                 s64 hash = ceph_decode_64(p);
1827                 if (hash != -1) {
1828                         pr_warn("ceph_object_locator::hash is set\n");
1829                         goto e_inval;
1830                 }
1831         }
1832
1833         /* skip the rest */
1834         *p = struct_end;
1835 out:
1836         return ret;
1837
1838 e_inval:
1839         ret = -EINVAL;
1840         goto out;
1841 }
1842
1843 static int ceph_redirect_decode(void **p, void *end,
1844                                 struct ceph_request_redirect *redir)
1845 {
1846         u8 struct_v, struct_cv;
1847         u32 len;
1848         void *struct_end;
1849         int ret;
1850
1851         ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1852         struct_v = ceph_decode_8(p);
1853         struct_cv = ceph_decode_8(p);
1854         if (struct_cv > 1) {
1855                 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1856                         struct_v, struct_cv);
1857                 goto e_inval;
1858         }
1859         len = ceph_decode_32(p);
1860         ceph_decode_need(p, end, len, e_inval);
1861         struct_end = *p + len;
1862
1863         ret = ceph_oloc_decode(p, end, &redir->oloc);
1864         if (ret)
1865                 goto out;
1866
1867         len = ceph_decode_32(p);
1868         if (len > 0) {
1869                 pr_warn("ceph_request_redirect::object_name is set\n");
1870                 goto e_inval;
1871         }
1872
1873         len = ceph_decode_32(p);
1874         *p += len; /* skip osd_instructions */
1875
1876         /* skip the rest */
1877         *p = struct_end;
1878 out:
1879         return ret;
1880
1881 e_inval:
1882         ret = -EINVAL;
1883         goto out;
1884 }
1885
1886 struct MOSDOpReply {
1887         struct ceph_pg pgid;
1888         u64 flags;
1889         int result;
1890         u32 epoch;
1891         int num_ops;
1892         u32 outdata_len[CEPH_OSD_MAX_OPS];
1893         s32 rval[CEPH_OSD_MAX_OPS];
1894         int retry_attempt;
1895         struct ceph_eversion replay_version;
1896         u64 user_version;
1897         struct ceph_request_redirect redirect;
1898 };
1899
1900 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
1901 {
1902         void *p = msg->front.iov_base;
1903         void *const end = p + msg->front.iov_len;
1904         u16 version = le16_to_cpu(msg->hdr.version);
1905         struct ceph_eversion bad_replay_version;
1906         u8 decode_redir;
1907         u32 len;
1908         int ret;
1909         int i;
1910
1911         ceph_decode_32_safe(&p, end, len, e_inval);
1912         ceph_decode_need(&p, end, len, e_inval);
1913         p += len; /* skip oid */
1914
1915         ret = ceph_decode_pgid(&p, end, &m->pgid);
1916         if (ret)
1917                 return ret;
1918
1919         ceph_decode_64_safe(&p, end, m->flags, e_inval);
1920         ceph_decode_32_safe(&p, end, m->result, e_inval);
1921         ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
1922         memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
1923         p += sizeof(bad_replay_version);
1924         ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1925
1926         ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
1927         if (m->num_ops > ARRAY_SIZE(m->outdata_len))
1928                 goto e_inval;
1929
1930         ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
1931                          e_inval);
1932         for (i = 0; i < m->num_ops; i++) {
1933                 struct ceph_osd_op *op = p;
1934
1935                 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1936                 p += sizeof(*op);
1937         }
1938
1939         ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
1940         for (i = 0; i < m->num_ops; i++)
1941                 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
1942
1943         if (version >= 5) {
1944                 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
1945                 memcpy(&m->replay_version, p, sizeof(m->replay_version));
1946                 p += sizeof(m->replay_version);
1947                 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
1948         } else {
1949                 m->replay_version = bad_replay_version; /* struct */
1950                 m->user_version = le64_to_cpu(m->replay_version.version);
1951         }
1952
1953         if (version >= 6) {
1954                 if (version >= 7)
1955                         ceph_decode_8_safe(&p, end, decode_redir, e_inval);
1956                 else
1957                         decode_redir = 1;
1958         } else {
1959                 decode_redir = 0;
1960         }
1961
1962         if (decode_redir) {
1963                 ret = ceph_redirect_decode(&p, end, &m->redirect);
1964                 if (ret)
1965                         return ret;
1966         } else {
1967                 ceph_oloc_init(&m->redirect.oloc);
1968         }
1969
1970         return 0;
1971
1972 e_inval:
1973         return -EINVAL;
1974 }
1975
1976 /*
1977  * We are done with @req if
1978  *   - @m is a safe reply, or
1979  *   - @m is an unsafe reply and we didn't want a safe one
1980  */
1981 static bool done_request(const struct ceph_osd_request *req,
1982                          const struct MOSDOpReply *m)
1983 {
1984         return (m->result < 0 ||
1985                 (m->flags & CEPH_OSD_FLAG_ONDISK) ||
1986                 !(req->r_flags & CEPH_OSD_FLAG_ONDISK));
1987 }
1988
1989 /*
1990  * handle osd op reply.  either call the callback if it is specified,
1991  * or do the completion to wake up the waiting thread.
1992  *
1993  * ->r_unsafe_callback is set?  yes                     no
1994  *
1995  * first reply is OK (needed    r_cb/r_completion,      r_cb/r_completion,
1996  * any or needed/got safe)      r_safe_completion       r_safe_completion
1997  *
1998  * first reply is unsafe        r_unsafe_cb(true)       (nothing)
1999  *
2000  * when we get the safe reply   r_unsafe_cb(false),     r_cb/r_completion,
2001  *                              r_safe_completion       r_safe_completion
2002  */
2003 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2004 {
2005         struct ceph_osd_request *req;
2006         struct MOSDOpReply m;
2007         u64 tid = le64_to_cpu(msg->hdr.tid);
2008         u32 data_len = 0;
2009         bool already_acked;
2010         int ret;
2011         int i;
2012
2013         dout("%s msg %p tid %llu\n", __func__, msg, tid);
2014
2015         down_read(&osdc->map_sem);
2016         mutex_lock(&osdc->request_mutex);
2017         req = lookup_request(&osdc->requests, tid);
2018         if (!req) {
2019                 dout("%s no tid %llu\n", __func__, tid);
2020                 goto out_unlock;
2021         }
2022         ceph_osdc_get_request(req);
2023
2024         ret = decode_MOSDOpReply(msg, &m);
2025         if (ret) {
2026                 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
2027                        req->r_tid, ret);
2028                 ceph_msg_dump(msg);
2029                 goto fail_request;
2030         }
2031         dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
2032              __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
2033              m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
2034              le64_to_cpu(m.replay_version.version), m.user_version);
2035
2036         if (m.retry_attempt >= 0) {
2037                 if (m.retry_attempt != req->r_attempts - 1) {
2038                         dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
2039                              req, req->r_tid, m.retry_attempt,
2040                              req->r_attempts - 1);
2041                         goto out_put;
2042                 }
2043         } else {
2044                 WARN_ON(1); /* MOSDOpReply v4 is assumed */
2045         }
2046
2047         if (!ceph_oloc_empty(&m.redirect.oloc)) {
2048                 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
2049                      m.redirect.oloc.pool);
2050                 __unregister_request(osdc, req);
2051
2052                 ceph_oloc_copy(&req->r_t.target_oloc, &m.redirect.oloc);
2053
2054                 /*
2055                  * Start redirect requests with nofail=true.  If
2056                  * mapping fails, request will end up on the notarget
2057                  * list, waiting for the new osdmap (which can take
2058                  * a while), even though the original request mapped
2059                  * successfully.  In the future we might want to follow
2060                  * original request's nofail setting here.
2061                  */
2062                 ret = __ceph_osdc_start_request(osdc, req, true);
2063                 BUG_ON(ret);
2064
2065                 goto out_put;
2066         }
2067
2068         if (m.num_ops != req->r_num_ops) {
2069                 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
2070                        req->r_num_ops, req->r_tid);
2071                 goto fail_request;
2072         }
2073         for (i = 0; i < req->r_num_ops; i++) {
2074                 dout(" req %p tid %llu op %d rval %d len %u\n", req,
2075                      req->r_tid, i, m.rval[i], m.outdata_len[i]);
2076                 req->r_ops[i].rval = m.rval[i];
2077                 req->r_ops[i].outdata_len = m.outdata_len[i];
2078                 data_len += m.outdata_len[i];
2079         }
2080         if (data_len != le32_to_cpu(msg->hdr.data_len)) {
2081                 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
2082                        le32_to_cpu(msg->hdr.data_len), req->r_tid);
2083                 goto fail_request;
2084         }
2085         dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
2086              req, req->r_tid, req->r_got_reply, m.result, data_len);
2087
2088         already_acked = req->r_got_reply;
2089         if (!already_acked) {
2090                 req->r_result = m.result ?: data_len;
2091                 req->r_replay_version = m.replay_version; /* struct */
2092                 req->r_got_reply = true;
2093         } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
2094                 dout("req %p tid %llu dup ack\n", req, req->r_tid);
2095                 goto out_put;
2096         }
2097
2098         if (done_request(req, &m)) {
2099                 __unregister_request(osdc, req);
2100                 if (req->r_linger) {
2101                         WARN_ON(req->r_unsafe_callback);
2102                         __register_linger_request(osdc, req);
2103                 }
2104         }
2105
2106         mutex_unlock(&osdc->request_mutex);
2107         up_read(&osdc->map_sem);
2108
2109         if (done_request(req, &m)) {
2110                 if (already_acked && req->r_unsafe_callback) {
2111                         dout("req %p tid %llu safe-cb\n", req, req->r_tid);
2112                         req->r_unsafe_callback(req, false);
2113                 } else {
2114                         dout("req %p tid %llu cb\n", req, req->r_tid);
2115                         __complete_request(req);
2116                 }
2117         } else {
2118                 if (req->r_unsafe_callback) {
2119                         dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
2120                         req->r_unsafe_callback(req, true);
2121                 } else {
2122                         WARN_ON(1);
2123                 }
2124         }
2125         if (m.flags & CEPH_OSD_FLAG_ONDISK)
2126                 complete_all(&req->r_safe_completion);
2127
2128         ceph_osdc_put_request(req);
2129         return;
2130
2131 fail_request:
2132         req->r_result = -EIO;
2133         __unregister_request(osdc, req);
2134         __complete_request(req);
2135         complete_all(&req->r_safe_completion);
2136 out_put:
2137         ceph_osdc_put_request(req);
2138 out_unlock:
2139         mutex_unlock(&osdc->request_mutex);
2140         up_read(&osdc->map_sem);
2141 }
2142
2143 static void reset_changed_osds(struct ceph_osd_client *osdc)
2144 {
2145         struct rb_node *p, *n;
2146
2147         dout("%s %p\n", __func__, osdc);
2148         for (p = rb_first(&osdc->osds); p; p = n) {
2149                 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
2150
2151                 n = rb_next(p);
2152                 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
2153                     memcmp(&osd->o_con.peer_addr,
2154                            ceph_osd_addr(osdc->osdmap,
2155                                          osd->o_osd),
2156                            sizeof(struct ceph_entity_addr)) != 0)
2157                         __reset_osd(osdc, osd);
2158         }
2159 }
2160
2161 /*
2162  * Requeue requests whose mapping to an OSD has changed.  If requests map to
2163  * no osd, request a new map.
2164  *
2165  * Caller should hold map_sem for read.
2166  */
2167 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
2168                           bool force_resend_writes)
2169 {
2170         struct ceph_osd_request *req, *nreq;
2171         struct rb_node *p;
2172         int needmap = 0;
2173         int err;
2174         bool force_resend_req;
2175
2176         dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
2177                 force_resend_writes ? " (force resend writes)" : "");
2178         mutex_lock(&osdc->request_mutex);
2179         for (p = rb_first(&osdc->requests); p; ) {
2180                 req = rb_entry(p, struct ceph_osd_request, r_node);
2181                 p = rb_next(p);
2182
2183                 /*
2184                  * For linger requests that have not yet been
2185                  * registered, move them to the linger list; they'll
2186                  * be sent to the osd in the loop below.  Unregister
2187                  * the request before re-registering it as a linger
2188                  * request to ensure the __map_request() below
2189                  * will decide it needs to be sent.
2190                  */
2191                 if (req->r_linger && list_empty(&req->r_linger_item)) {
2192                         dout("%p tid %llu restart on osd%d\n",
2193                              req, req->r_tid,
2194                              req->r_osd ? req->r_osd->o_osd : -1);
2195                         ceph_osdc_get_request(req);
2196                         __unregister_request(osdc, req);
2197                         __register_linger_request(osdc, req);
2198                         ceph_osdc_put_request(req);
2199                         continue;
2200                 }
2201
2202                 force_resend_req = force_resend ||
2203                         (force_resend_writes &&
2204                                 req->r_flags & CEPH_OSD_FLAG_WRITE);
2205                 err = __map_request(osdc, req, force_resend_req);
2206                 if (err < 0)
2207                         continue;  /* error */
2208                 if (req->r_osd == NULL) {
2209                         dout("%p tid %llu maps to no osd\n", req, req->r_tid);
2210                         needmap++;  /* request a newer map */
2211                 } else if (err > 0) {
2212                         if (!req->r_linger) {
2213                                 dout("%p tid %llu requeued on osd%d\n", req,
2214                                      req->r_tid,
2215                                      req->r_osd ? req->r_osd->o_osd : -1);
2216                                 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2217                         }
2218                 }
2219         }
2220
2221         list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2222                                  r_linger_item) {
2223                 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2224
2225                 err = __map_request(osdc, req,
2226                                     force_resend || force_resend_writes);
2227                 dout("__map_request returned %d\n", err);
2228                 if (err < 0)
2229                         continue;  /* hrm! */
2230                 if (req->r_osd == NULL || err > 0) {
2231                         if (req->r_osd == NULL) {
2232                                 dout("lingering %p tid %llu maps to no osd\n",
2233                                      req, req->r_tid);
2234                                 /*
2235                                  * A homeless lingering request makes
2236                                  * no sense, as it's job is to keep
2237                                  * a particular OSD connection open.
2238                                  * Request a newer map and kick the
2239                                  * request, knowing that it won't be
2240                                  * resent until we actually get a map
2241                                  * that can tell us where to send it.
2242                                  */
2243                                 needmap++;
2244                         }
2245
2246                         dout("kicking lingering %p tid %llu osd%d\n", req,
2247                              req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2248                         __register_request(osdc, req);
2249                         __unregister_linger_request(osdc, req);
2250                 }
2251         }
2252         reset_changed_osds(osdc);
2253         mutex_unlock(&osdc->request_mutex);
2254
2255         if (needmap) {
2256                 dout("%d requests for down osds, need new map\n", needmap);
2257                 ceph_monc_request_next_osdmap(&osdc->client->monc);
2258         }
2259 }
2260
2261
2262 /*
2263  * Process updated osd map.
2264  *
2265  * The message contains any number of incremental and full maps, normally
2266  * indicating some sort of topology change in the cluster.  Kick requests
2267  * off to different OSDs as needed.
2268  */
2269 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2270 {
2271         void *p, *end, *next;
2272         u32 nr_maps, maplen;
2273         u32 epoch;
2274         struct ceph_osdmap *newmap = NULL, *oldmap;
2275         int err;
2276         struct ceph_fsid fsid;
2277         bool was_full;
2278
2279         dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2280         p = msg->front.iov_base;
2281         end = p + msg->front.iov_len;
2282
2283         /* verify fsid */
2284         ceph_decode_need(&p, end, sizeof(fsid), bad);
2285         ceph_decode_copy(&p, &fsid, sizeof(fsid));
2286         if (ceph_check_fsid(osdc->client, &fsid) < 0)
2287                 return;
2288
2289         down_write(&osdc->map_sem);
2290
2291         was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2292
2293         /* incremental maps */
2294         ceph_decode_32_safe(&p, end, nr_maps, bad);
2295         dout(" %d inc maps\n", nr_maps);
2296         while (nr_maps > 0) {
2297                 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
2298                 epoch = ceph_decode_32(&p);
2299                 maplen = ceph_decode_32(&p);
2300                 ceph_decode_need(&p, end, maplen, bad);
2301                 next = p + maplen;
2302                 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2303                         dout("applying incremental map %u len %d\n",
2304                              epoch, maplen);
2305                         newmap = osdmap_apply_incremental(&p, next,
2306                                                           osdc->osdmap);
2307                         if (IS_ERR(newmap)) {
2308                                 err = PTR_ERR(newmap);
2309                                 goto bad;
2310                         }
2311                         BUG_ON(!newmap);
2312                         if (newmap != osdc->osdmap) {
2313                                 ceph_osdmap_destroy(osdc->osdmap);
2314                                 osdc->osdmap = newmap;
2315                         }
2316                         was_full = was_full ||
2317                                 ceph_osdmap_flag(osdc->osdmap,
2318                                                  CEPH_OSDMAP_FULL);
2319                         kick_requests(osdc, 0, was_full);
2320                 } else {
2321                         dout("ignoring incremental map %u len %d\n",
2322                              epoch, maplen);
2323                 }
2324                 p = next;
2325                 nr_maps--;
2326         }
2327         if (newmap)
2328                 goto done;
2329
2330         /* full maps */
2331         ceph_decode_32_safe(&p, end, nr_maps, bad);
2332         dout(" %d full maps\n", nr_maps);
2333         while (nr_maps) {
2334                 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
2335                 epoch = ceph_decode_32(&p);
2336                 maplen = ceph_decode_32(&p);
2337                 ceph_decode_need(&p, end, maplen, bad);
2338                 if (nr_maps > 1) {
2339                         dout("skipping non-latest full map %u len %d\n",
2340                              epoch, maplen);
2341                 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2342                         dout("skipping full map %u len %d, "
2343                              "older than our %u\n", epoch, maplen,
2344                              osdc->osdmap->epoch);
2345                 } else {
2346                         int skipped_map = 0;
2347
2348                         dout("taking full map %u len %d\n", epoch, maplen);
2349                         newmap = ceph_osdmap_decode(&p, p+maplen);
2350                         if (IS_ERR(newmap)) {
2351                                 err = PTR_ERR(newmap);
2352                                 goto bad;
2353                         }
2354                         BUG_ON(!newmap);
2355                         oldmap = osdc->osdmap;
2356                         osdc->osdmap = newmap;
2357                         if (oldmap) {
2358                                 if (oldmap->epoch + 1 < newmap->epoch)
2359                                         skipped_map = 1;
2360                                 ceph_osdmap_destroy(oldmap);
2361                         }
2362                         was_full = was_full ||
2363                                 ceph_osdmap_flag(osdc->osdmap,
2364                                                  CEPH_OSDMAP_FULL);
2365                         kick_requests(osdc, skipped_map, was_full);
2366                 }
2367                 p += maplen;
2368                 nr_maps--;
2369         }
2370
2371         if (!osdc->osdmap)
2372                 goto bad;
2373 done:
2374         downgrade_write(&osdc->map_sem);
2375         ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2376                           osdc->osdmap->epoch);
2377
2378         /*
2379          * subscribe to subsequent osdmap updates if full to ensure
2380          * we find out when we are no longer full and stop returning
2381          * ENOSPC.
2382          */
2383         if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2384                 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2385                 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
2386                 ceph_monc_request_next_osdmap(&osdc->client->monc);
2387
2388         mutex_lock(&osdc->request_mutex);
2389         __send_queued(osdc);
2390         mutex_unlock(&osdc->request_mutex);
2391         up_read(&osdc->map_sem);
2392         wake_up_all(&osdc->client->auth_wq);
2393         return;
2394
2395 bad:
2396         pr_err("osdc handle_map corrupt msg\n");
2397         ceph_msg_dump(msg);
2398         up_write(&osdc->map_sem);
2399 }
2400
2401 /*
2402  * watch/notify callback event infrastructure
2403  *
2404  * These callbacks are used both for watch and notify operations.
2405  */
2406 static void __release_event(struct kref *kref)
2407 {
2408         struct ceph_osd_event *event =
2409                 container_of(kref, struct ceph_osd_event, kref);
2410
2411         dout("__release_event %p\n", event);
2412         kfree(event);
2413 }
2414
2415 static void get_event(struct ceph_osd_event *event)
2416 {
2417         kref_get(&event->kref);
2418 }
2419
2420 void ceph_osdc_put_event(struct ceph_osd_event *event)
2421 {
2422         kref_put(&event->kref, __release_event);
2423 }
2424 EXPORT_SYMBOL(ceph_osdc_put_event);
2425
2426 static void __insert_event(struct ceph_osd_client *osdc,
2427                              struct ceph_osd_event *new)
2428 {
2429         struct rb_node **p = &osdc->event_tree.rb_node;
2430         struct rb_node *parent = NULL;
2431         struct ceph_osd_event *event = NULL;
2432
2433         while (*p) {
2434                 parent = *p;
2435                 event = rb_entry(parent, struct ceph_osd_event, node);
2436                 if (new->cookie < event->cookie)
2437                         p = &(*p)->rb_left;
2438                 else if (new->cookie > event->cookie)
2439                         p = &(*p)->rb_right;
2440                 else
2441                         BUG();
2442         }
2443
2444         rb_link_node(&new->node, parent, p);
2445         rb_insert_color(&new->node, &osdc->event_tree);
2446 }
2447
2448 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2449                                                 u64 cookie)
2450 {
2451         struct rb_node **p = &osdc->event_tree.rb_node;
2452         struct rb_node *parent = NULL;
2453         struct ceph_osd_event *event = NULL;
2454
2455         while (*p) {
2456                 parent = *p;
2457                 event = rb_entry(parent, struct ceph_osd_event, node);
2458                 if (cookie < event->cookie)
2459                         p = &(*p)->rb_left;
2460                 else if (cookie > event->cookie)
2461                         p = &(*p)->rb_right;
2462                 else
2463                         return event;
2464         }
2465         return NULL;
2466 }
2467
2468 static void __remove_event(struct ceph_osd_event *event)
2469 {
2470         struct ceph_osd_client *osdc = event->osdc;
2471
2472         if (!RB_EMPTY_NODE(&event->node)) {
2473                 dout("__remove_event removed %p\n", event);
2474                 rb_erase(&event->node, &osdc->event_tree);
2475                 ceph_osdc_put_event(event);
2476         } else {
2477                 dout("__remove_event didn't remove %p\n", event);
2478         }
2479 }
2480
2481 int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2482                            void (*event_cb)(u64, u64, u8, void *),
2483                            void *data, struct ceph_osd_event **pevent)
2484 {
2485         struct ceph_osd_event *event;
2486
2487         event = kmalloc(sizeof(*event), GFP_NOIO);
2488         if (!event)
2489                 return -ENOMEM;
2490
2491         dout("create_event %p\n", event);
2492         event->cb = event_cb;
2493         event->one_shot = 0;
2494         event->data = data;
2495         event->osdc = osdc;
2496         INIT_LIST_HEAD(&event->osd_node);
2497         RB_CLEAR_NODE(&event->node);
2498         kref_init(&event->kref);   /* one ref for us */
2499         kref_get(&event->kref);    /* one ref for the caller */
2500
2501         spin_lock(&osdc->event_lock);
2502         event->cookie = ++osdc->event_count;
2503         __insert_event(osdc, event);
2504         spin_unlock(&osdc->event_lock);
2505
2506         *pevent = event;
2507         return 0;
2508 }
2509 EXPORT_SYMBOL(ceph_osdc_create_event);
2510
2511 void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2512 {
2513         struct ceph_osd_client *osdc = event->osdc;
2514
2515         dout("cancel_event %p\n", event);
2516         spin_lock(&osdc->event_lock);
2517         __remove_event(event);
2518         spin_unlock(&osdc->event_lock);
2519         ceph_osdc_put_event(event); /* caller's */
2520 }
2521 EXPORT_SYMBOL(ceph_osdc_cancel_event);
2522
2523
2524 static void do_event_work(struct work_struct *work)
2525 {
2526         struct ceph_osd_event_work *event_work =
2527                 container_of(work, struct ceph_osd_event_work, work);
2528         struct ceph_osd_event *event = event_work->event;
2529         u64 ver = event_work->ver;
2530         u64 notify_id = event_work->notify_id;
2531         u8 opcode = event_work->opcode;
2532
2533         dout("do_event_work completing %p\n", event);
2534         event->cb(ver, notify_id, opcode, event->data);
2535         dout("do_event_work completed %p\n", event);
2536         ceph_osdc_put_event(event);
2537         kfree(event_work);
2538 }
2539
2540
2541 /*
2542  * Process osd watch notifications
2543  */
2544 static void handle_watch_notify(struct ceph_osd_client *osdc,
2545                                 struct ceph_msg *msg)
2546 {
2547         void *p, *end;
2548         u8 proto_ver;
2549         u64 cookie, ver, notify_id;
2550         u8 opcode;
2551         struct ceph_osd_event *event;
2552         struct ceph_osd_event_work *event_work;
2553
2554         p = msg->front.iov_base;
2555         end = p + msg->front.iov_len;
2556
2557         ceph_decode_8_safe(&p, end, proto_ver, bad);
2558         ceph_decode_8_safe(&p, end, opcode, bad);
2559         ceph_decode_64_safe(&p, end, cookie, bad);
2560         ceph_decode_64_safe(&p, end, ver, bad);
2561         ceph_decode_64_safe(&p, end, notify_id, bad);
2562
2563         spin_lock(&osdc->event_lock);
2564         event = __find_event(osdc, cookie);
2565         if (event) {
2566                 BUG_ON(event->one_shot);
2567                 get_event(event);
2568         }
2569         spin_unlock(&osdc->event_lock);
2570         dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2571              cookie, ver, event);
2572         if (event) {
2573                 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
2574                 if (!event_work) {
2575                         pr_err("couldn't allocate event_work\n");
2576                         ceph_osdc_put_event(event);
2577                         return;
2578                 }
2579                 INIT_WORK(&event_work->work, do_event_work);
2580                 event_work->event = event;
2581                 event_work->ver = ver;
2582                 event_work->notify_id = notify_id;
2583                 event_work->opcode = opcode;
2584
2585                 queue_work(osdc->notify_wq, &event_work->work);
2586         }
2587
2588         return;
2589
2590 bad:
2591         pr_err("osdc handle_watch_notify corrupt msg\n");
2592 }
2593
2594 /*
2595  * Register request, send initial attempt.
2596  */
2597 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2598                             struct ceph_osd_request *req,
2599                             bool nofail)
2600 {
2601         int rc;
2602
2603         down_read(&osdc->map_sem);
2604         mutex_lock(&osdc->request_mutex);
2605
2606         rc = __ceph_osdc_start_request(osdc, req, nofail);
2607
2608         mutex_unlock(&osdc->request_mutex);
2609         up_read(&osdc->map_sem);
2610
2611         return rc;
2612 }
2613 EXPORT_SYMBOL(ceph_osdc_start_request);
2614
2615 /*
2616  * Unregister a registered request.  The request is not completed (i.e.
2617  * no callbacks or wakeups) - higher layers are supposed to know what
2618  * they are canceling.
2619  */
2620 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2621 {
2622         struct ceph_osd_client *osdc = req->r_osdc;
2623
2624         mutex_lock(&osdc->request_mutex);
2625         if (req->r_linger)
2626                 __unregister_linger_request(osdc, req);
2627         __unregister_request(osdc, req);
2628         mutex_unlock(&osdc->request_mutex);
2629
2630         dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2631 }
2632 EXPORT_SYMBOL(ceph_osdc_cancel_request);
2633
2634 /*
2635  * wait for a request to complete
2636  */
2637 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2638                            struct ceph_osd_request *req)
2639 {
2640         int rc;
2641
2642         dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2643
2644         rc = wait_for_completion_interruptible(&req->r_completion);
2645         if (rc < 0) {
2646                 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2647                 ceph_osdc_cancel_request(req);
2648
2649                 /* kludge - need to to wake ceph_osdc_sync() */
2650                 complete_all(&req->r_safe_completion);
2651                 return rc;
2652         }
2653
2654         dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2655              req->r_result);
2656         return req->r_result;
2657 }
2658 EXPORT_SYMBOL(ceph_osdc_wait_request);
2659
2660 /*
2661  * sync - wait for all in-flight requests to flush.  avoid starvation.
2662  */
2663 void ceph_osdc_sync(struct ceph_osd_client *osdc)
2664 {
2665         struct ceph_osd_request *req;
2666         u64 last_tid, next_tid = 0;
2667
2668         mutex_lock(&osdc->request_mutex);
2669         last_tid = osdc->last_tid;
2670         while (1) {
2671                 req = __lookup_request_ge(osdc, next_tid);
2672                 if (!req)
2673                         break;
2674                 if (req->r_tid > last_tid)
2675                         break;
2676
2677                 next_tid = req->r_tid + 1;
2678                 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2679                         continue;
2680
2681                 ceph_osdc_get_request(req);
2682                 mutex_unlock(&osdc->request_mutex);
2683                 dout("sync waiting on tid %llu (last is %llu)\n",
2684                      req->r_tid, last_tid);
2685                 wait_for_completion(&req->r_safe_completion);
2686                 mutex_lock(&osdc->request_mutex);
2687                 ceph_osdc_put_request(req);
2688         }
2689         mutex_unlock(&osdc->request_mutex);
2690         dout("sync done (thru tid %llu)\n", last_tid);
2691 }
2692 EXPORT_SYMBOL(ceph_osdc_sync);
2693
2694 /*
2695  * Call all pending notify callbacks - for use after a watch is
2696  * unregistered, to make sure no more callbacks for it will be invoked
2697  */
2698 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2699 {
2700         flush_workqueue(osdc->notify_wq);
2701 }
2702 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2703
2704
2705 /*
2706  * init, shutdown
2707  */
2708 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2709 {
2710         int err;
2711
2712         dout("init\n");
2713         osdc->client = client;
2714         osdc->osdmap = NULL;
2715         init_rwsem(&osdc->map_sem);
2716         mutex_init(&osdc->request_mutex);
2717         osdc->last_tid = 0;
2718         osdc->osds = RB_ROOT;
2719         INIT_LIST_HEAD(&osdc->osd_lru);
2720         osdc->requests = RB_ROOT;
2721         INIT_LIST_HEAD(&osdc->req_lru);
2722         INIT_LIST_HEAD(&osdc->req_unsent);
2723         INIT_LIST_HEAD(&osdc->req_notarget);
2724         INIT_LIST_HEAD(&osdc->req_linger);
2725         osdc->num_requests = 0;
2726         INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2727         INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2728         spin_lock_init(&osdc->event_lock);
2729         osdc->event_tree = RB_ROOT;
2730         osdc->event_count = 0;
2731
2732         schedule_delayed_work(&osdc->osds_timeout_work,
2733             round_jiffies_relative(osdc->client->options->osd_idle_ttl));
2734
2735         err = -ENOMEM;
2736         osdc->req_mempool = mempool_create_slab_pool(10,
2737                                                      ceph_osd_request_cache);
2738         if (!osdc->req_mempool)
2739                 goto out;
2740
2741         err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2742                                 PAGE_SIZE, 10, true, "osd_op");
2743         if (err < 0)
2744                 goto out_mempool;
2745         err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2746                                 PAGE_SIZE, 10, true, "osd_op_reply");
2747         if (err < 0)
2748                 goto out_msgpool;
2749
2750         err = -ENOMEM;
2751         osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2752         if (!osdc->notify_wq)
2753                 goto out_msgpool_reply;
2754
2755         return 0;
2756
2757 out_msgpool_reply:
2758         ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2759 out_msgpool:
2760         ceph_msgpool_destroy(&osdc->msgpool_op);
2761 out_mempool:
2762         mempool_destroy(osdc->req_mempool);
2763 out:
2764         return err;
2765 }
2766
2767 void ceph_osdc_stop(struct ceph_osd_client *osdc)
2768 {
2769         flush_workqueue(osdc->notify_wq);
2770         destroy_workqueue(osdc->notify_wq);
2771         cancel_delayed_work_sync(&osdc->timeout_work);
2772         cancel_delayed_work_sync(&osdc->osds_timeout_work);
2773
2774         mutex_lock(&osdc->request_mutex);
2775         while (!RB_EMPTY_ROOT(&osdc->osds)) {
2776                 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
2777                                                 struct ceph_osd, o_node);
2778                 remove_osd(osdc, osd);
2779         }
2780         mutex_unlock(&osdc->request_mutex);
2781
2782         if (osdc->osdmap) {
2783                 ceph_osdmap_destroy(osdc->osdmap);
2784                 osdc->osdmap = NULL;
2785         }
2786         mempool_destroy(osdc->req_mempool);
2787         ceph_msgpool_destroy(&osdc->msgpool_op);
2788         ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2789 }
2790
2791 /*
2792  * Read some contiguous pages.  If we cross a stripe boundary, shorten
2793  * *plen.  Return number of bytes read, or error.
2794  */
2795 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2796                         struct ceph_vino vino, struct ceph_file_layout *layout,
2797                         u64 off, u64 *plen,
2798                         u32 truncate_seq, u64 truncate_size,
2799                         struct page **pages, int num_pages, int page_align)
2800 {
2801         struct ceph_osd_request *req;
2802         int rc = 0;
2803
2804         dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2805              vino.snap, off, *plen);
2806         req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
2807                                     CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2808                                     NULL, truncate_seq, truncate_size,
2809                                     false);
2810         if (IS_ERR(req))
2811                 return PTR_ERR(req);
2812
2813         /* it may be a short read due to an object boundary */
2814         osd_req_op_extent_osd_data_pages(req, 0,
2815                                 pages, *plen, page_align, false, false);
2816
2817         dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2818              off, *plen, *plen, page_align);
2819
2820         rc = ceph_osdc_start_request(osdc, req, false);
2821         if (!rc)
2822                 rc = ceph_osdc_wait_request(osdc, req);
2823
2824         ceph_osdc_put_request(req);
2825         dout("readpages result %d\n", rc);
2826         return rc;
2827 }
2828 EXPORT_SYMBOL(ceph_osdc_readpages);
2829
2830 /*
2831  * do a synchronous write on N pages
2832  */
2833 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2834                          struct ceph_file_layout *layout,
2835                          struct ceph_snap_context *snapc,
2836                          u64 off, u64 len,
2837                          u32 truncate_seq, u64 truncate_size,
2838                          struct timespec *mtime,
2839                          struct page **pages, int num_pages)
2840 {
2841         struct ceph_osd_request *req;
2842         int rc = 0;
2843         int page_align = off & ~PAGE_MASK;
2844
2845         req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
2846                                     CEPH_OSD_OP_WRITE,
2847                                     CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2848                                     snapc, truncate_seq, truncate_size,
2849                                     true);
2850         if (IS_ERR(req))
2851                 return PTR_ERR(req);
2852
2853         /* it may be a short write due to an object boundary */
2854         osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2855                                 false, false);
2856         dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
2857
2858         req->r_mtime = *mtime;
2859         rc = ceph_osdc_start_request(osdc, req, true);
2860         if (!rc)
2861                 rc = ceph_osdc_wait_request(osdc, req);
2862
2863         ceph_osdc_put_request(req);
2864         if (rc == 0)
2865                 rc = len;
2866         dout("writepages result %d\n", rc);
2867         return rc;
2868 }
2869 EXPORT_SYMBOL(ceph_osdc_writepages);
2870
2871 int ceph_osdc_setup(void)
2872 {
2873         size_t size = sizeof(struct ceph_osd_request) +
2874             CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
2875
2876         BUG_ON(ceph_osd_request_cache);
2877         ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
2878                                                    0, 0, NULL);
2879
2880         return ceph_osd_request_cache ? 0 : -ENOMEM;
2881 }
2882 EXPORT_SYMBOL(ceph_osdc_setup);
2883
2884 void ceph_osdc_cleanup(void)
2885 {
2886         BUG_ON(!ceph_osd_request_cache);
2887         kmem_cache_destroy(ceph_osd_request_cache);
2888         ceph_osd_request_cache = NULL;
2889 }
2890 EXPORT_SYMBOL(ceph_osdc_cleanup);
2891
2892 /*
2893  * handle incoming message
2894  */
2895 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2896 {
2897         struct ceph_osd *osd = con->private;
2898         struct ceph_osd_client *osdc;
2899         int type = le16_to_cpu(msg->hdr.type);
2900
2901         if (!osd)
2902                 goto out;
2903         osdc = osd->o_osdc;
2904
2905         switch (type) {
2906         case CEPH_MSG_OSD_MAP:
2907                 ceph_osdc_handle_map(osdc, msg);
2908                 break;
2909         case CEPH_MSG_OSD_OPREPLY:
2910                 handle_reply(osdc, msg);
2911                 break;
2912         case CEPH_MSG_WATCH_NOTIFY:
2913                 handle_watch_notify(osdc, msg);
2914                 break;
2915
2916         default:
2917                 pr_err("received unknown message type %d %s\n", type,
2918                        ceph_msg_type_name(type));
2919         }
2920 out:
2921         ceph_msg_put(msg);
2922 }
2923
2924 /*
2925  * Lookup and return message for incoming reply.  Don't try to do
2926  * anything about a larger than preallocated data portion of the
2927  * message at the moment - for now, just skip the message.
2928  */
2929 static struct ceph_msg *get_reply(struct ceph_connection *con,
2930                                   struct ceph_msg_header *hdr,
2931                                   int *skip)
2932 {
2933         struct ceph_osd *osd = con->private;
2934         struct ceph_osd_client *osdc = osd->o_osdc;
2935         struct ceph_msg *m;
2936         struct ceph_osd_request *req;
2937         int front_len = le32_to_cpu(hdr->front_len);
2938         int data_len = le32_to_cpu(hdr->data_len);
2939         u64 tid;
2940
2941         tid = le64_to_cpu(hdr->tid);
2942         mutex_lock(&osdc->request_mutex);
2943         req = lookup_request(&osdc->requests, tid);
2944         if (!req) {
2945                 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
2946                      osd->o_osd, tid);
2947                 m = NULL;
2948                 *skip = 1;
2949                 goto out;
2950         }
2951
2952         ceph_msg_revoke_incoming(req->r_reply);
2953
2954         if (front_len > req->r_reply->front_alloc_len) {
2955                 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
2956                         __func__, osd->o_osd, req->r_tid, front_len,
2957                         req->r_reply->front_alloc_len);
2958                 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2959                                  false);
2960                 if (!m)
2961                         goto out;
2962                 ceph_msg_put(req->r_reply);
2963                 req->r_reply = m;
2964         }
2965
2966         if (data_len > req->r_reply->data_length) {
2967                 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
2968                         __func__, osd->o_osd, req->r_tid, data_len,
2969                         req->r_reply->data_length);
2970                 m = NULL;
2971                 *skip = 1;
2972                 goto out;
2973         }
2974
2975         m = ceph_msg_get(req->r_reply);
2976         dout("get_reply tid %lld %p\n", tid, m);
2977
2978 out:
2979         mutex_unlock(&osdc->request_mutex);
2980         return m;
2981 }
2982
2983 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2984                                   struct ceph_msg_header *hdr,
2985                                   int *skip)
2986 {
2987         struct ceph_osd *osd = con->private;
2988         int type = le16_to_cpu(hdr->type);
2989         int front = le32_to_cpu(hdr->front_len);
2990
2991         *skip = 0;
2992         switch (type) {
2993         case CEPH_MSG_OSD_MAP:
2994         case CEPH_MSG_WATCH_NOTIFY:
2995                 return ceph_msg_new(type, front, GFP_NOFS, false);
2996         case CEPH_MSG_OSD_OPREPLY:
2997                 return get_reply(con, hdr, skip);
2998         default:
2999                 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
3000                         osd->o_osd);
3001                 *skip = 1;
3002                 return NULL;
3003         }
3004 }
3005
3006 /*
3007  * Wrappers to refcount containing ceph_osd struct
3008  */
3009 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
3010 {
3011         struct ceph_osd *osd = con->private;
3012         if (get_osd(osd))
3013                 return con;
3014         return NULL;
3015 }
3016
3017 static void put_osd_con(struct ceph_connection *con)
3018 {
3019         struct ceph_osd *osd = con->private;
3020         put_osd(osd);
3021 }
3022
3023 /*
3024  * authentication
3025  */
3026 /*
3027  * Note: returned pointer is the address of a structure that's
3028  * managed separately.  Caller must *not* attempt to free it.
3029  */
3030 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
3031                                         int *proto, int force_new)
3032 {
3033         struct ceph_osd *o = con->private;
3034         struct ceph_osd_client *osdc = o->o_osdc;
3035         struct ceph_auth_client *ac = osdc->client->monc.auth;
3036         struct ceph_auth_handshake *auth = &o->o_auth;
3037
3038         if (force_new && auth->authorizer) {
3039                 ceph_auth_destroy_authorizer(auth->authorizer);
3040                 auth->authorizer = NULL;
3041         }
3042         if (!auth->authorizer) {
3043                 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
3044                                                       auth);
3045                 if (ret)
3046                         return ERR_PTR(ret);
3047         } else {
3048                 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
3049                                                      auth);
3050                 if (ret)
3051                         return ERR_PTR(ret);
3052         }
3053         *proto = ac->protocol;
3054
3055         return auth;
3056 }
3057
3058
3059 static int verify_authorizer_reply(struct ceph_connection *con, int len)
3060 {
3061         struct ceph_osd *o = con->private;
3062         struct ceph_osd_client *osdc = o->o_osdc;
3063         struct ceph_auth_client *ac = osdc->client->monc.auth;
3064
3065         return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
3066 }
3067
3068 static int invalidate_authorizer(struct ceph_connection *con)
3069 {
3070         struct ceph_osd *o = con->private;
3071         struct ceph_osd_client *osdc = o->o_osdc;
3072         struct ceph_auth_client *ac = osdc->client->monc.auth;
3073
3074         ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
3075         return ceph_monc_validate_auth(&osdc->client->monc);
3076 }
3077
3078 static int osd_sign_message(struct ceph_msg *msg)
3079 {
3080         struct ceph_osd *o = msg->con->private;
3081         struct ceph_auth_handshake *auth = &o->o_auth;
3082
3083         return ceph_auth_sign_message(auth, msg);
3084 }
3085
3086 static int osd_check_message_signature(struct ceph_msg *msg)
3087 {
3088         struct ceph_osd *o = msg->con->private;
3089         struct ceph_auth_handshake *auth = &o->o_auth;
3090
3091         return ceph_auth_check_message_signature(auth, msg);
3092 }
3093
3094 static const struct ceph_connection_operations osd_con_ops = {
3095         .get = get_osd_con,
3096         .put = put_osd_con,
3097         .dispatch = dispatch,
3098         .get_authorizer = get_authorizer,
3099         .verify_authorizer_reply = verify_authorizer_reply,
3100         .invalidate_authorizer = invalidate_authorizer,
3101         .alloc_msg = alloc_msg,
3102         .sign_message = osd_sign_message,
3103         .check_message_signature = osd_check_message_signature,
3104         .fault = osd_reset,
3105 };