Pileus Git - ~andy/linux/blob - 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_OP_FRONT_LEN        4096
  23 #define OSD_OPREPLY_FRONT_LEN   512
  24
  25 static const struct ceph_connection_operations osd_con_ops;
  26
  27 static void __send_queued(struct ceph_osd_client *osdc);
  28 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
  29 static void __register_request(struct ceph_osd_client *osdc,
  30                                struct ceph_osd_request *req);
  31 static void __unregister_linger_request(struct ceph_osd_client *osdc,
  32                                         struct ceph_osd_request *req);
  33 static void __send_request(struct ceph_osd_client *osdc,
  34                            struct ceph_osd_request *req);
  35
  36 /*
  37  * Implement client access to distributed object storage cluster.
  38  *
  39  * All data objects are stored within a cluster/cloud of OSDs, or
  40  * "object storage devices."  (Note that Ceph OSDs have _nothing_ to
  41  * do with the T10 OSD extensions to SCSI.)  Ceph OSDs are simply
  42  * remote daemons serving up and coordinating consistent and safe
  43  * access to storage.
  44  *
  45  * Cluster membership and the mapping of data objects onto storage devices
  46  * are described by the osd map.
  47  *
  48  * We keep track of pending OSD requests (read, write), resubmit
  49  * requests to different OSDs when the cluster topology/data layout
  50  * change, or retry the affected requests when the communications
  51  * channel with an OSD is reset.
  52  */
  53
  54 /*
  55  * calculate the mapping of a file extent onto an object, and fill out the
  56  * request accordingly.  shorten extent as necessary if it crosses an
  57  * object boundary.
  58  *
  59  * fill osd op in request message.
  60  */
  61 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
  62                         u64 *objnum, u64 *objoff, u64 *objlen)
  63 {
  64         u64 orig_len = *plen;
  65         int r;
  66
  67         /* object extent? */
  68         r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
  69                                           objoff, objlen);
  70         if (r < 0)
  71                 return r;
  72         if (*objlen < orig_len) {
  73                 *plen = *objlen;
  74                 dout(" skipping last %llu, final file extent %llu~%llu\n",
  75                      orig_len - *plen, off, *plen);
  76         }
  77
  78         dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
  79
  80         return 0;
  81 }
  82
  83 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
  84 {
  85         memset(osd_data, 0, sizeof (*osd_data));
  86         osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
  87 }
  88
  89 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
  90                         struct page **pages, u64 length, u32 alignment,
  91                         bool pages_from_pool, bool own_pages)
  92 {
  93         osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
  94         osd_data->pages = pages;
  95         osd_data->length = length;
  96         osd_data->alignment = alignment;
  97         osd_data->pages_from_pool = pages_from_pool;
  98         osd_data->own_pages = own_pages;
  99 }
 100
 101 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
 102                         struct ceph_pagelist *pagelist)
 103 {
 104         osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
 105         osd_data->pagelist = pagelist;
 106 }
 107
 108 #ifdef CONFIG_BLOCK
 109 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
 110                         struct bio *bio, size_t bio_length)
 111 {
 112         osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
 113         osd_data->bio = bio;
 114         osd_data->bio_length = bio_length;
 115 }
 116 #endif /* CONFIG_BLOCK */
 117
 118 struct ceph_osd_data *
 119 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
 120                         unsigned int which, bool write_request)
 121 {
 122         BUG_ON(which >= osd_req->r_num_ops);
 123
 124         return &osd_req->r_ops[which].extent.osd_data;
 125 }
 126 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
 127
 128 struct ceph_osd_data *
 129 osd_req_op_cls_request_info(struct ceph_osd_request *osd_req,
 130                         unsigned int which)
 131 {
 132         BUG_ON(which >= osd_req->r_num_ops);
 133
 134         return &osd_req->r_ops[which].cls.request_info;
 135 }
 136 EXPORT_SYMBOL(osd_req_op_cls_request_info);     /* ??? */
 137
 138 struct ceph_osd_data *
 139 osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
 140                         unsigned int which)
 141 {
 142         BUG_ON(which >= osd_req->r_num_ops);
 143
 144         return &osd_req->r_ops[which].cls.response_data;
 145 }
 146 EXPORT_SYMBOL(osd_req_op_cls_response_data);    /* ??? */
 147
 148 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
 149                         unsigned int which, bool write_request,
 150                         struct page **pages, u64 length, u32 alignment,
 151                         bool pages_from_pool, bool own_pages)
 152 {
 153         struct ceph_osd_data *osd_data;
 154
 155         osd_data = osd_req_op_extent_osd_data(osd_req, which, write_request);
 156         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 157                                 pages_from_pool, own_pages);
 158 }
 159 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
 160
 161 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
 162                         unsigned int which, bool write_request,
 163                         struct ceph_pagelist *pagelist)
 164 {
 165         struct ceph_osd_data *osd_data;
 166
 167         osd_data = osd_req_op_extent_osd_data(osd_req, which, write_request);
 168         ceph_osd_data_pagelist_init(osd_data, pagelist);
 169 }
 170 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
 171
 172 #ifdef CONFIG_BLOCK
 173 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
 174                         unsigned int which, bool write_request,
 175                         struct bio *bio, size_t bio_length)
 176 {
 177         struct ceph_osd_data *osd_data;
 178
 179         osd_data = osd_req_op_extent_osd_data(osd_req, which, write_request);
 180         ceph_osd_data_bio_init(osd_data, bio, bio_length);
 181 }
 182 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
 183 #endif /* CONFIG_BLOCK */
 184
 185 static void osd_req_op_cls_request_info_pagelist(
 186                         struct ceph_osd_request *osd_req,
 187                         unsigned int which, struct ceph_pagelist *pagelist)
 188 {
 189         struct ceph_osd_data *osd_data;
 190
 191         osd_data = osd_req_op_cls_request_info(osd_req, which);
 192         ceph_osd_data_pagelist_init(osd_data, pagelist);
 193 }
 194
 195 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
 196                         unsigned int which, struct page **pages, u64 length,
 197                         u32 alignment, bool pages_from_pool, bool own_pages)
 198 {
 199         struct ceph_osd_data *osd_data;
 200
 201         osd_data = osd_req_op_cls_response_data(osd_req, which);
 202         ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 203                                 pages_from_pool, own_pages);
 204 }
 205 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
 206
 207 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
 208 {
 209         switch (osd_data->type) {
 210         case CEPH_OSD_DATA_TYPE_NONE:
 211                 return 0;
 212         case CEPH_OSD_DATA_TYPE_PAGES:
 213                 return osd_data->length;
 214         case CEPH_OSD_DATA_TYPE_PAGELIST:
 215                 return (u64)osd_data->pagelist->length;
 216 #ifdef CONFIG_BLOCK
 217         case CEPH_OSD_DATA_TYPE_BIO:
 218                 return (u64)osd_data->bio_length;
 219 #endif /* CONFIG_BLOCK */
 220         default:
 221                 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
 222                 return 0;
 223         }
 224 }
 225
 226
 227 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
 228 {
 229         if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
 230                 int num_pages;
 231
 232                 num_pages = calc_pages_for((u64)osd_data->alignment,
 233                                                 (u64)osd_data->length);
 234                 ceph_release_page_vector(osd_data->pages, num_pages);
 235         }
 236         ceph_osd_data_init(osd_data);
 237 }
 238
 239 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
 240                         unsigned int which)
 241 {
 242         struct ceph_osd_req_op *op;
 243
 244         BUG_ON(which >= osd_req->r_num_ops);
 245         op = &osd_req->r_ops[which];
 246
 247         switch (op->op) {
 248         case CEPH_OSD_OP_READ:
 249         case CEPH_OSD_OP_WRITE:
 250                 ceph_osd_data_release(&op->extent.osd_data);
 251                 break;
 252         case CEPH_OSD_OP_CALL:
 253                 ceph_osd_data_release(&op->cls.request_info);
 254                 ceph_osd_data_release(&op->cls.response_data);
 255                 break;
 256         default:
 257                 break;
 258         }
 259 }
 260
 261 /*
 262  * requests
 263  */
 264 void ceph_osdc_release_request(struct kref *kref)
 265 {
 266         struct ceph_osd_request *req;
 267         unsigned int which;
 268
 269         req = container_of(kref, struct ceph_osd_request, r_kref);
 270         if (req->r_request)
 271                 ceph_msg_put(req->r_request);
 272         if (req->r_reply) {
 273                 ceph_msg_revoke_incoming(req->r_reply);
 274                 ceph_msg_put(req->r_reply);
 275         }
 276
 277         for (which = 0; which < req->r_num_ops; which++)
 278                 osd_req_op_data_release(req, which);
 279
 280         ceph_put_snap_context(req->r_snapc);
 281         if (req->r_mempool)
 282                 mempool_free(req, req->r_osdc->req_mempool);
 283         else
 284                 kfree(req);
 285 }
 286 EXPORT_SYMBOL(ceph_osdc_release_request);
 287
 288 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
 289                                                struct ceph_snap_context *snapc,
 290                                                unsigned int num_ops,
 291                                                bool use_mempool,
 292                                                gfp_t gfp_flags)
 293 {
 294         struct ceph_osd_request *req;
 295         struct ceph_msg *msg;
 296         size_t msg_size;
 297
 298         BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
 299         BUG_ON(num_ops > CEPH_OSD_MAX_OP);
 300
 301         msg_size = 4 + 4 + 8 + 8 + 4+8;
 302         msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
 303         msg_size += 1 + 8 + 4 + 4;     /* pg_t */
 304         msg_size += 4 + MAX_OBJ_NAME_SIZE;
 305         msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
 306         msg_size += 8;  /* snapid */
 307         msg_size += 8;  /* snap_seq */
 308         msg_size += 8 * (snapc ? snapc->num_snaps : 0);  /* snaps */
 309         msg_size += 4;
 310
 311         if (use_mempool) {
 312                 req = mempool_alloc(osdc->req_mempool, gfp_flags);
 313                 memset(req, 0, sizeof(*req));
 314         } else {
 315                 req = kzalloc(sizeof(*req), gfp_flags);
 316         }
 317         if (req == NULL)
 318                 return NULL;
 319
 320         req->r_osdc = osdc;
 321         req->r_mempool = use_mempool;
 322         req->r_num_ops = num_ops;
 323
 324         kref_init(&req->r_kref);
 325         init_completion(&req->r_completion);
 326         init_completion(&req->r_safe_completion);
 327         RB_CLEAR_NODE(&req->r_node);
 328         INIT_LIST_HEAD(&req->r_unsafe_item);
 329         INIT_LIST_HEAD(&req->r_linger_item);
 330         INIT_LIST_HEAD(&req->r_linger_osd);
 331         INIT_LIST_HEAD(&req->r_req_lru_item);
 332         INIT_LIST_HEAD(&req->r_osd_item);
 333
 334         /* create reply message */
 335         if (use_mempool)
 336                 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
 337         else
 338                 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
 339                                    OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
 340         if (!msg) {
 341                 ceph_osdc_put_request(req);
 342                 return NULL;
 343         }
 344         req->r_reply = msg;
 345
 346         /* create request message; allow space for oid */
 347         if (use_mempool)
 348                 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
 349         else
 350                 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
 351         if (!msg) {
 352                 ceph_osdc_put_request(req);
 353                 return NULL;
 354         }
 355
 356         memset(msg->front.iov_base, 0, msg->front.iov_len);
 357
 358         req->r_request = msg;
 359
 360         return req;
 361 }
 362 EXPORT_SYMBOL(ceph_osdc_alloc_request);
 363
 364 static bool osd_req_opcode_valid(u16 opcode)
 365 {
 366         switch (opcode) {
 367         case CEPH_OSD_OP_READ:
 368         case CEPH_OSD_OP_STAT:
 369         case CEPH_OSD_OP_MAPEXT:
 370         case CEPH_OSD_OP_MASKTRUNC:
 371         case CEPH_OSD_OP_SPARSE_READ:
 372         case CEPH_OSD_OP_NOTIFY:
 373         case CEPH_OSD_OP_NOTIFY_ACK:
 374         case CEPH_OSD_OP_ASSERT_VER:
 375         case CEPH_OSD_OP_WRITE:
 376         case CEPH_OSD_OP_WRITEFULL:
 377         case CEPH_OSD_OP_TRUNCATE:
 378         case CEPH_OSD_OP_ZERO:
 379         case CEPH_OSD_OP_DELETE:
 380         case CEPH_OSD_OP_APPEND:
 381         case CEPH_OSD_OP_STARTSYNC:
 382         case CEPH_OSD_OP_SETTRUNC:
 383         case CEPH_OSD_OP_TRIMTRUNC:
 384         case CEPH_OSD_OP_TMAPUP:
 385         case CEPH_OSD_OP_TMAPPUT:
 386         case CEPH_OSD_OP_TMAPGET:
 387         case CEPH_OSD_OP_CREATE:
 388         case CEPH_OSD_OP_ROLLBACK:
 389         case CEPH_OSD_OP_WATCH:
 390         case CEPH_OSD_OP_OMAPGETKEYS:
 391         case CEPH_OSD_OP_OMAPGETVALS:
 392         case CEPH_OSD_OP_OMAPGETHEADER:
 393         case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
 394         case CEPH_OSD_OP_OMAPSETVALS:
 395         case CEPH_OSD_OP_OMAPSETHEADER:
 396         case CEPH_OSD_OP_OMAPCLEAR:
 397         case CEPH_OSD_OP_OMAPRMKEYS:
 398         case CEPH_OSD_OP_OMAP_CMP:
 399         case CEPH_OSD_OP_CLONERANGE:
 400         case CEPH_OSD_OP_ASSERT_SRC_VERSION:
 401         case CEPH_OSD_OP_SRC_CMPXATTR:
 402         case CEPH_OSD_OP_GETXATTR:
 403         case CEPH_OSD_OP_GETXATTRS:
 404         case CEPH_OSD_OP_CMPXATTR:
 405         case CEPH_OSD_OP_SETXATTR:
 406         case CEPH_OSD_OP_SETXATTRS:
 407         case CEPH_OSD_OP_RESETXATTRS:
 408         case CEPH_OSD_OP_RMXATTR:
 409         case CEPH_OSD_OP_PULL:
 410         case CEPH_OSD_OP_PUSH:
 411         case CEPH_OSD_OP_BALANCEREADS:
 412         case CEPH_OSD_OP_UNBALANCEREADS:
 413         case CEPH_OSD_OP_SCRUB:
 414         case CEPH_OSD_OP_SCRUB_RESERVE:
 415         case CEPH_OSD_OP_SCRUB_UNRESERVE:
 416         case CEPH_OSD_OP_SCRUB_STOP:
 417         case CEPH_OSD_OP_SCRUB_MAP:
 418         case CEPH_OSD_OP_WRLOCK:
 419         case CEPH_OSD_OP_WRUNLOCK:
 420         case CEPH_OSD_OP_RDLOCK:
 421         case CEPH_OSD_OP_RDUNLOCK:
 422         case CEPH_OSD_OP_UPLOCK:
 423         case CEPH_OSD_OP_DNLOCK:
 424         case CEPH_OSD_OP_CALL:
 425         case CEPH_OSD_OP_PGLS:
 426         case CEPH_OSD_OP_PGLS_FILTER:
 427                 return true;
 428         default:
 429                 return false;
 430         }
 431 }
 432
 433 /*
 434  * This is an osd op init function for opcodes that have no data or
 435  * other information associated with them.  It also serves as a
 436  * common init routine for all the other init functions, below.
 437  */
 438 static struct ceph_osd_req_op *
 439 osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
 440                                 u16 opcode)
 441 {
 442         struct ceph_osd_req_op *op;
 443
 444         BUG_ON(which >= osd_req->r_num_ops);
 445         BUG_ON(!osd_req_opcode_valid(opcode));
 446
 447         op = &osd_req->r_ops[which];
 448         memset(op, 0, sizeof (*op));
 449         op->op = opcode;
 450
 451         return op;
 452 }
 453
 454 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
 455                                 unsigned int which, u16 opcode,
 456                                 u64 offset, u64 length,
 457                                 u64 truncate_size, u32 truncate_seq)
 458 {
 459         struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, opcode);
 460         size_t payload_len = 0;
 461
 462         BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
 463
 464         op->extent.offset = offset;
 465         op->extent.length = length;
 466         op->extent.truncate_size = truncate_size;
 467         op->extent.truncate_seq = truncate_seq;
 468         if (opcode == CEPH_OSD_OP_WRITE)
 469                 payload_len += length;
 470
 471         op->payload_len = payload_len;
 472 }
 473 EXPORT_SYMBOL(osd_req_op_extent_init);
 474
 475 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
 476                                 unsigned int which, u64 length)
 477 {
 478         struct ceph_osd_req_op *op;
 479         u64 previous;
 480
 481         BUG_ON(which >= osd_req->r_num_ops);
 482         op = &osd_req->r_ops[which];
 483         previous = op->extent.length;
 484
 485         if (length == previous)
 486                 return;         /* Nothing to do */
 487         BUG_ON(length > previous);
 488
 489         op->extent.length = length;
 490         op->payload_len -= previous - length;
 491 }
 492 EXPORT_SYMBOL(osd_req_op_extent_update);
 493
 494 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
 495                         u16 opcode, const char *class, const char *method,
 496                         const void *request_data, size_t request_data_size)
 497 {
 498         struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, opcode);
 499         struct ceph_pagelist *pagelist;
 500         size_t payload_len = 0;
 501         size_t size;
 502
 503         BUG_ON(opcode != CEPH_OSD_OP_CALL);
 504
 505         pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
 506         BUG_ON(!pagelist);
 507         ceph_pagelist_init(pagelist);
 508
 509         op->cls.class_name = class;
 510         size = strlen(class);
 511         BUG_ON(size > (size_t) U8_MAX);
 512         op->cls.class_len = size;
 513         ceph_pagelist_append(pagelist, class, size);
 514         payload_len += size;
 515
 516         op->cls.method_name = method;
 517         size = strlen(method);
 518         BUG_ON(size > (size_t) U8_MAX);
 519         op->cls.method_len = size;
 520         ceph_pagelist_append(pagelist, method, size);
 521         payload_len += size;
 522
 523         op->cls.request_data = request_data;
 524         BUG_ON(request_data_size > (size_t) U32_MAX);
 525         op->cls.request_data_len = (u32) request_data_size;
 526         ceph_pagelist_append(pagelist, request_data, request_data_size);
 527         payload_len += request_data_size;
 528
 529         osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
 530
 531         op->cls.argc = 0;       /* currently unused */
 532
 533         op->payload_len = payload_len;
 534 }
 535 EXPORT_SYMBOL(osd_req_op_cls_init);
 536
 537 void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
 538                                 unsigned int which, u16 opcode,
 539                                 u64 cookie, u64 version, int flag)
 540 {
 541         struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, opcode);
 542
 543         BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
 544
 545         op->watch.cookie = cookie;
 546         /* op->watch.ver = version; */  /* XXX 3847 */
 547         op->watch.ver = cpu_to_le64(version);
 548         if (opcode == CEPH_OSD_OP_WATCH && flag)
 549                 op->watch.flag = (u8)1;
 550 }
 551 EXPORT_SYMBOL(osd_req_op_watch_init);
 552
 553 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
 554                                 struct ceph_osd_data *osd_data)
 555 {
 556         u64 length = ceph_osd_data_length(osd_data);
 557
 558         if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
 559                 BUG_ON(length > (u64) SIZE_MAX);
 560                 if (length)
 561                         ceph_msg_data_add_pages(msg, osd_data->pages,
 562                                         length, osd_data->alignment);
 563         } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
 564                 BUG_ON(!length);
 565                 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
 566 #ifdef CONFIG_BLOCK
 567         } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
 568                 ceph_msg_data_add_bio(msg, osd_data->bio, length);
 569 #endif
 570         } else {
 571                 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
 572         }
 573 }
 574
 575 static u64 osd_req_encode_op(struct ceph_osd_request *req,
 576                               struct ceph_osd_op *dst, unsigned int which)
 577 {
 578         struct ceph_osd_req_op *src;
 579         u64 request_data_len = 0;
 580
 581         BUG_ON(which >= req->r_num_ops);
 582         src = &req->r_ops[which];
 583         if (WARN_ON(!osd_req_opcode_valid(src->op))) {
 584                 pr_err("unrecognized osd opcode %d\n", src->op);
 585
 586                 return 0;
 587         }
 588
 589         switch (src->op) {
 590         case CEPH_OSD_OP_STAT:
 591                 break;
 592         case CEPH_OSD_OP_READ:
 593         case CEPH_OSD_OP_WRITE:
 594                 if (src->op == CEPH_OSD_OP_WRITE)
 595                         request_data_len = src->extent.length;
 596                 dst->extent.offset = cpu_to_le64(src->extent.offset);
 597                 dst->extent.length = cpu_to_le64(src->extent.length);
 598                 dst->extent.truncate_size =
 599                         cpu_to_le64(src->extent.truncate_size);
 600                 dst->extent.truncate_seq =
 601                         cpu_to_le32(src->extent.truncate_seq);
 602                 if (src->op == CEPH_OSD_OP_WRITE)
 603                         ceph_osdc_msg_data_add(req->r_request,
 604                                                 &src->extent.osd_data);
 605                 else
 606                         ceph_osdc_msg_data_add(req->r_reply,
 607                                                 &src->extent.osd_data);
 608                 break;
 609         case CEPH_OSD_OP_CALL:
 610                 dst->cls.class_len = src->cls.class_len;
 611                 dst->cls.method_len = src->cls.method_len;
 612                 dst->cls.indata_len = cpu_to_le32(src->cls.request_data_len);
 613                 ceph_osdc_msg_data_add(req->r_reply, &src->cls.response_data);
 614                 ceph_osdc_msg_data_add(req->r_request, &src->cls.request_info);
 615                 BUG_ON(src->cls.request_info.type !=
 616                                         CEPH_OSD_DATA_TYPE_PAGELIST);
 617                 request_data_len = src->cls.request_info.pagelist->length;
 618                 break;
 619         case CEPH_OSD_OP_STARTSYNC:
 620                 break;
 621         case CEPH_OSD_OP_NOTIFY_ACK:
 622         case CEPH_OSD_OP_WATCH:
 623                 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
 624                 dst->watch.ver = cpu_to_le64(src->watch.ver);
 625                 dst->watch.flag = src->watch.flag;
 626                 break;
 627         default:
 628                 pr_err("unsupported osd opcode %s\n",
 629                         ceph_osd_op_name(src->op));
 630                 WARN_ON(1);
 631
 632                 return 0;
 633         }
 634         dst->op = cpu_to_le16(src->op);
 635         dst->payload_len = cpu_to_le32(src->payload_len);
 636
 637         return request_data_len;
 638 }
 639
 640 /*
 641  * build new request AND message, calculate layout, and adjust file
 642  * extent as needed.
 643  *
 644  * if the file was recently truncated, we include information about its
 645  * old and new size so that the object can be updated appropriately.  (we
 646  * avoid synchronously deleting truncated objects because it's slow.)
 647  *
 648  * if @do_sync, include a 'startsync' command so that the osd will flush
 649  * data quickly.
 650  */
 651 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
 652                                                struct ceph_file_layout *layout,
 653                                                struct ceph_vino vino,
 654                                                u64 off, u64 *plen, int num_ops,
 655                                                int opcode, int flags,
 656                                                struct ceph_snap_context *snapc,
 657                                                u32 truncate_seq,
 658                                                u64 truncate_size,
 659                                                bool use_mempool)
 660 {
 661         struct ceph_osd_request *req;
 662         u64 objnum = 0;
 663         u64 objoff = 0;
 664         u64 objlen = 0;
 665         u32 object_size;
 666         u64 object_base;
 667         int r;
 668
 669         BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
 670
 671         req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
 672                                         GFP_NOFS);
 673         if (!req)
 674                 return ERR_PTR(-ENOMEM);
 675
 676         req->r_flags = flags;
 677
 678         /* calculate max write size */
 679         r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
 680         if (r < 0) {
 681                 ceph_osdc_put_request(req);
 682                 return ERR_PTR(r);
 683         }
 684
 685         object_size = le32_to_cpu(layout->fl_object_size);
 686         object_base = off - objoff;
 687         if (truncate_size <= object_base) {
 688                 truncate_size = 0;
 689         } else {
 690                 truncate_size -= object_base;
 691                 if (truncate_size > object_size)
 692                         truncate_size = object_size;
 693         }
 694
 695         osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
 696                                 truncate_size, truncate_seq);
 697
 698         /*
 699          * A second op in the ops array means the caller wants to
 700          * also issue a include a 'startsync' command so that the
 701          * osd will flush data quickly.
 702          */
 703         if (num_ops > 1)
 704                 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
 705
 706         req->r_file_layout = *layout;  /* keep a copy */
 707
 708         snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
 709                 vino.ino, objnum);
 710         req->r_oid_len = strlen(req->r_oid);
 711
 712         return req;
 713 }
 714 EXPORT_SYMBOL(ceph_osdc_new_request);
 715
 716 /*
 717  * We keep osd requests in an rbtree, sorted by ->r_tid.
 718  */
 719 static void __insert_request(struct ceph_osd_client *osdc,
 720                              struct ceph_osd_request *new)
 721 {
 722         struct rb_node **p = &osdc->requests.rb_node;
 723         struct rb_node *parent = NULL;
 724         struct ceph_osd_request *req = NULL;
 725
 726         while (*p) {
 727                 parent = *p;
 728                 req = rb_entry(parent, struct ceph_osd_request, r_node);
 729                 if (new->r_tid < req->r_tid)
 730                         p = &(*p)->rb_left;
 731                 else if (new->r_tid > req->r_tid)
 732                         p = &(*p)->rb_right;
 733                 else
 734                         BUG();
 735         }
 736
 737         rb_link_node(&new->r_node, parent, p);
 738         rb_insert_color(&new->r_node, &osdc->requests);
 739 }
 740
 741 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
 742                                                  u64 tid)
 743 {
 744         struct ceph_osd_request *req;
 745         struct rb_node *n = osdc->requests.rb_node;
 746
 747         while (n) {
 748                 req = rb_entry(n, struct ceph_osd_request, r_node);
 749                 if (tid < req->r_tid)
 750                         n = n->rb_left;
 751                 else if (tid > req->r_tid)
 752                         n = n->rb_right;
 753                 else
 754                         return req;
 755         }
 756         return NULL;
 757 }
 758
 759 static struct ceph_osd_request *
 760 __lookup_request_ge(struct ceph_osd_client *osdc,
 761                     u64 tid)
 762 {
 763         struct ceph_osd_request *req;
 764         struct rb_node *n = osdc->requests.rb_node;
 765
 766         while (n) {
 767                 req = rb_entry(n, struct ceph_osd_request, r_node);
 768                 if (tid < req->r_tid) {
 769                         if (!n->rb_left)
 770                                 return req;
 771                         n = n->rb_left;
 772                 } else if (tid > req->r_tid) {
 773                         n = n->rb_right;
 774                 } else {
 775                         return req;
 776                 }
 777         }
 778         return NULL;
 779 }
 780
 781 /*
 782  * Resubmit requests pending on the given osd.
 783  */
 784 static void __kick_osd_requests(struct ceph_osd_client *osdc,
 785                                 struct ceph_osd *osd)
 786 {
 787         struct ceph_osd_request *req, *nreq;
 788         LIST_HEAD(resend);
 789         int err;
 790
 791         dout("__kick_osd_requests osd%d\n", osd->o_osd);
 792         err = __reset_osd(osdc, osd);
 793         if (err)
 794                 return;
 795         /*
 796          * Build up a list of requests to resend by traversing the
 797          * osd's list of requests.  Requests for a given object are
 798          * sent in tid order, and that is also the order they're
 799          * kept on this list.  Therefore all requests that are in
 800          * flight will be found first, followed by all requests that
 801          * have not yet been sent.  And to resend requests while
 802          * preserving this order we will want to put any sent
 803          * requests back on the front of the osd client's unsent
 804          * list.
 805          *
 806          * So we build a separate ordered list of already-sent
 807          * requests for the affected osd and splice it onto the
 808          * front of the osd client's unsent list.  Once we've seen a
 809          * request that has not yet been sent we're done.  Those
 810          * requests are already sitting right where they belong.
 811          */
 812         list_for_each_entry(req, &osd->o_requests, r_osd_item) {
 813                 if (!req->r_sent)
 814                         break;
 815                 list_move_tail(&req->r_req_lru_item, &resend);
 816                 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
 817                      osd->o_osd);
 818                 if (!req->r_linger)
 819                         req->r_flags |= CEPH_OSD_FLAG_RETRY;
 820         }
 821         list_splice(&resend, &osdc->req_unsent);
 822
 823         /*
 824          * Linger requests are re-registered before sending, which
 825          * sets up a new tid for each.  We add them to the unsent
 826          * list at the end to keep things in tid order.
 827          */
 828         list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
 829                                  r_linger_osd) {
 830                 /*
 831                  * reregister request prior to unregistering linger so
 832                  * that r_osd is preserved.
 833                  */
 834                 BUG_ON(!list_empty(&req->r_req_lru_item));
 835                 __register_request(osdc, req);
 836                 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
 837                 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
 838                 __unregister_linger_request(osdc, req);
 839                 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
 840                      osd->o_osd);
 841         }
 842 }
 843
 844 /*
 845  * If the osd connection drops, we need to resubmit all requests.
 846  */
 847 static void osd_reset(struct ceph_connection *con)
 848 {
 849         struct ceph_osd *osd = con->private;
 850         struct ceph_osd_client *osdc;
 851
 852         if (!osd)
 853                 return;
 854         dout("osd_reset osd%d\n", osd->o_osd);
 855         osdc = osd->o_osdc;
 856         down_read(&osdc->map_sem);
 857         mutex_lock(&osdc->request_mutex);
 858         __kick_osd_requests(osdc, osd);
 859         __send_queued(osdc);
 860         mutex_unlock(&osdc->request_mutex);
 861         up_read(&osdc->map_sem);
 862 }
 863
 864 /*
 865  * Track open sessions with osds.
 866  */
 867 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
 868 {
 869         struct ceph_osd *osd;
 870
 871         osd = kzalloc(sizeof(*osd), GFP_NOFS);
 872         if (!osd)
 873                 return NULL;
 874
 875         atomic_set(&osd->o_ref, 1);
 876         osd->o_osdc = osdc;
 877         osd->o_osd = onum;
 878         RB_CLEAR_NODE(&osd->o_node);
 879         INIT_LIST_HEAD(&osd->o_requests);
 880         INIT_LIST_HEAD(&osd->o_linger_requests);
 881         INIT_LIST_HEAD(&osd->o_osd_lru);
 882         osd->o_incarnation = 1;
 883
 884         ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
 885
 886         INIT_LIST_HEAD(&osd->o_keepalive_item);
 887         return osd;
 888 }
 889
 890 static struct ceph_osd *get_osd(struct ceph_osd *osd)
 891 {
 892         if (atomic_inc_not_zero(&osd->o_ref)) {
 893                 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
 894                      atomic_read(&osd->o_ref));
 895                 return osd;
 896         } else {
 897                 dout("get_osd %p FAIL\n", osd);
 898                 return NULL;
 899         }
 900 }
 901
 902 static void put_osd(struct ceph_osd *osd)
 903 {
 904         dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
 905              atomic_read(&osd->o_ref) - 1);
 906         if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
 907                 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
 908
 909                 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
 910                 kfree(osd);
 911         }
 912 }
 913
 914 /*
 915  * remove an osd from our map
 916  */
 917 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
 918 {
 919         dout("__remove_osd %p\n", osd);
 920         BUG_ON(!list_empty(&osd->o_requests));
 921         rb_erase(&osd->o_node, &osdc->osds);
 922         list_del_init(&osd->o_osd_lru);
 923         ceph_con_close(&osd->o_con);
 924         put_osd(osd);
 925 }
 926
 927 static void remove_all_osds(struct ceph_osd_client *osdc)
 928 {
 929         dout("%s %p\n", __func__, osdc);
 930         mutex_lock(&osdc->request_mutex);
 931         while (!RB_EMPTY_ROOT(&osdc->osds)) {
 932                 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
 933                                                 struct ceph_osd, o_node);
 934                 __remove_osd(osdc, osd);
 935         }
 936         mutex_unlock(&osdc->request_mutex);
 937 }
 938
 939 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
 940                               struct ceph_osd *osd)
 941 {
 942         dout("__move_osd_to_lru %p\n", osd);
 943         BUG_ON(!list_empty(&osd->o_osd_lru));
 944         list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
 945         osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
 946 }
 947
 948 static void __remove_osd_from_lru(struct ceph_osd *osd)
 949 {
 950         dout("__remove_osd_from_lru %p\n", osd);
 951         if (!list_empty(&osd->o_osd_lru))
 952                 list_del_init(&osd->o_osd_lru);
 953 }
 954
 955 static void remove_old_osds(struct ceph_osd_client *osdc)
 956 {
 957         struct ceph_osd *osd, *nosd;
 958
 959         dout("__remove_old_osds %p\n", osdc);
 960         mutex_lock(&osdc->request_mutex);
 961         list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
 962                 if (time_before(jiffies, osd->lru_ttl))
 963                         break;
 964                 __remove_osd(osdc, osd);
 965         }
 966         mutex_unlock(&osdc->request_mutex);
 967 }
 968
 969 /*
 970  * reset osd connect
 971  */
 972 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
 973 {
 974         struct ceph_entity_addr *peer_addr;
 975
 976         dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
 977         if (list_empty(&osd->o_requests) &&
 978             list_empty(&osd->o_linger_requests)) {
 979                 __remove_osd(osdc, osd);
 980
 981                 return -ENODEV;
 982         }
 983
 984         peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
 985         if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
 986                         !ceph_con_opened(&osd->o_con)) {
 987                 struct ceph_osd_request *req;
 988
 989                 dout(" osd addr hasn't changed and connection never opened,"
 990                      " letting msgr retry");
 991                 /* touch each r_stamp for handle_timeout()'s benfit */
 992                 list_for_each_entry(req, &osd->o_requests, r_osd_item)
 993                         req->r_stamp = jiffies;
 994
 995                 return -EAGAIN;
 996         }
 997
 998         ceph_con_close(&osd->o_con);
 999         ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1000         osd->o_incarnation++;
1001
1002         return 0;
1003 }
1004
1005 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1006 {
1007         struct rb_node **p = &osdc->osds.rb_node;
1008         struct rb_node *parent = NULL;
1009         struct ceph_osd *osd = NULL;
1010
1011         dout("__insert_osd %p osd%d\n", new, new->o_osd);
1012         while (*p) {
1013                 parent = *p;
1014                 osd = rb_entry(parent, struct ceph_osd, o_node);
1015                 if (new->o_osd < osd->o_osd)
1016                         p = &(*p)->rb_left;
1017                 else if (new->o_osd > osd->o_osd)
1018                         p = &(*p)->rb_right;
1019                 else
1020                         BUG();
1021         }
1022
1023         rb_link_node(&new->o_node, parent, p);
1024         rb_insert_color(&new->o_node, &osdc->osds);
1025 }
1026
1027 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1028 {
1029         struct ceph_osd *osd;
1030         struct rb_node *n = osdc->osds.rb_node;
1031
1032         while (n) {
1033                 osd = rb_entry(n, struct ceph_osd, o_node);
1034                 if (o < osd->o_osd)
1035                         n = n->rb_left;
1036                 else if (o > osd->o_osd)
1037                         n = n->rb_right;
1038                 else
1039                         return osd;
1040         }
1041         return NULL;
1042 }
1043
1044 static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1045 {
1046         schedule_delayed_work(&osdc->timeout_work,
1047                         osdc->client->options->osd_keepalive_timeout * HZ);
1048 }
1049
1050 static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1051 {
1052         cancel_delayed_work(&osdc->timeout_work);
1053 }
1054
1055 /*
1056  * Register request, assign tid.  If this is the first request, set up
1057  * the timeout event.
1058  */
1059 static void __register_request(struct ceph_osd_client *osdc,
1060                                struct ceph_osd_request *req)
1061 {
1062         req->r_tid = ++osdc->last_tid;
1063         req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1064         dout("__register_request %p tid %lld\n", req, req->r_tid);
1065         __insert_request(osdc, req);
1066         ceph_osdc_get_request(req);
1067         osdc->num_requests++;
1068         if (osdc->num_requests == 1) {
1069                 dout(" first request, scheduling timeout\n");
1070                 __schedule_osd_timeout(osdc);
1071         }
1072 }
1073
1074 /*
1075  * called under osdc->request_mutex
1076  */
1077 static void __unregister_request(struct ceph_osd_client *osdc,
1078                                  struct ceph_osd_request *req)
1079 {
1080         if (RB_EMPTY_NODE(&req->r_node)) {
1081                 dout("__unregister_request %p tid %lld not registered\n",
1082                         req, req->r_tid);
1083                 return;
1084         }
1085
1086         dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1087         rb_erase(&req->r_node, &osdc->requests);
1088         osdc->num_requests--;
1089
1090         if (req->r_osd) {
1091                 /* make sure the original request isn't in flight. */
1092                 ceph_msg_revoke(req->r_request);
1093
1094                 list_del_init(&req->r_osd_item);
1095                 if (list_empty(&req->r_osd->o_requests) &&
1096                     list_empty(&req->r_osd->o_linger_requests)) {
1097                         dout("moving osd to %p lru\n", req->r_osd);
1098                         __move_osd_to_lru(osdc, req->r_osd);
1099                 }
1100                 if (list_empty(&req->r_linger_item))
1101                         req->r_osd = NULL;
1102         }
1103
1104         list_del_init(&req->r_req_lru_item);
1105         ceph_osdc_put_request(req);
1106
1107         if (osdc->num_requests == 0) {
1108                 dout(" no requests, canceling timeout\n");
1109                 __cancel_osd_timeout(osdc);
1110         }
1111 }
1112
1113 /*
1114  * Cancel a previously queued request message
1115  */
1116 static void __cancel_request(struct ceph_osd_request *req)
1117 {
1118         if (req->r_sent && req->r_osd) {
1119                 ceph_msg_revoke(req->r_request);
1120                 req->r_sent = 0;
1121         }
1122 }
1123
1124 static void __register_linger_request(struct ceph_osd_client *osdc,
1125                                     struct ceph_osd_request *req)
1126 {
1127         dout("__register_linger_request %p\n", req);
1128         list_add_tail(&req->r_linger_item, &osdc->req_linger);
1129         if (req->r_osd)
1130                 list_add_tail(&req->r_linger_osd,
1131                               &req->r_osd->o_linger_requests);
1132 }
1133
1134 static void __unregister_linger_request(struct ceph_osd_client *osdc,
1135                                         struct ceph_osd_request *req)
1136 {
1137         dout("__unregister_linger_request %p\n", req);
1138         list_del_init(&req->r_linger_item);
1139         if (req->r_osd) {
1140                 list_del_init(&req->r_linger_osd);
1141
1142                 if (list_empty(&req->r_osd->o_requests) &&
1143                     list_empty(&req->r_osd->o_linger_requests)) {
1144                         dout("moving osd to %p lru\n", req->r_osd);
1145                         __move_osd_to_lru(osdc, req->r_osd);
1146                 }
1147                 if (list_empty(&req->r_osd_item))
1148                         req->r_osd = NULL;
1149         }
1150 }
1151
1152 void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1153                                          struct ceph_osd_request *req)
1154 {
1155         mutex_lock(&osdc->request_mutex);
1156         if (req->r_linger) {
1157                 __unregister_linger_request(osdc, req);
1158                 ceph_osdc_put_request(req);
1159         }
1160         mutex_unlock(&osdc->request_mutex);
1161 }
1162 EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1163
1164 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1165                                   struct ceph_osd_request *req)
1166 {
1167         if (!req->r_linger) {
1168                 dout("set_request_linger %p\n", req);
1169                 req->r_linger = 1;
1170                 /*
1171                  * caller is now responsible for calling
1172                  * unregister_linger_request
1173                  */
1174                 ceph_osdc_get_request(req);
1175         }
1176 }
1177 EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1178
1179 /*
1180  * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1181  * (as needed), and set the request r_osd appropriately.  If there is
1182  * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1183  * (unsent, homeless) or leave on in-flight lru.
1184  *
1185  * Return 0 if unchanged, 1 if changed, or negative on error.
1186  *
1187  * Caller should hold map_sem for read and request_mutex.
1188  */
1189 static int __map_request(struct ceph_osd_client *osdc,
1190                          struct ceph_osd_request *req, int force_resend)
1191 {
1192         struct ceph_pg pgid;
1193         int acting[CEPH_PG_MAX_SIZE];
1194         int o = -1, num = 0;
1195         int err;
1196
1197         dout("map_request %p tid %lld\n", req, req->r_tid);
1198         err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
1199                                 ceph_file_layout_pg_pool(req->r_file_layout));
1200         if (err) {
1201                 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1202                 return err;
1203         }
1204         req->r_pgid = pgid;
1205
1206         err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1207         if (err > 0) {
1208                 o = acting[0];
1209                 num = err;
1210         }
1211
1212         if ((!force_resend &&
1213              req->r_osd && req->r_osd->o_osd == o &&
1214              req->r_sent >= req->r_osd->o_incarnation &&
1215              req->r_num_pg_osds == num &&
1216              memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
1217             (req->r_osd == NULL && o == -1))
1218                 return 0;  /* no change */
1219
1220         dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1221              req->r_tid, pgid.pool, pgid.seed, o,
1222              req->r_osd ? req->r_osd->o_osd : -1);
1223
1224         /* record full pg acting set */
1225         memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1226         req->r_num_pg_osds = num;
1227
1228         if (req->r_osd) {
1229                 __cancel_request(req);
1230                 list_del_init(&req->r_osd_item);
1231                 req->r_osd = NULL;
1232         }
1233
1234         req->r_osd = __lookup_osd(osdc, o);
1235         if (!req->r_osd && o >= 0) {
1236                 err = -ENOMEM;
1237                 req->r_osd = create_osd(osdc, o);
1238                 if (!req->r_osd) {
1239                         list_move(&req->r_req_lru_item, &osdc->req_notarget);
1240                         goto out;
1241                 }
1242
1243                 dout("map_request osd %p is osd%d\n", req->r_osd, o);
1244                 __insert_osd(osdc, req->r_osd);
1245
1246                 ceph_con_open(&req->r_osd->o_con,
1247                               CEPH_ENTITY_TYPE_OSD, o,
1248                               &osdc->osdmap->osd_addr[o]);
1249         }
1250
1251         if (req->r_osd) {
1252                 __remove_osd_from_lru(req->r_osd);
1253                 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1254                 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1255         } else {
1256                 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1257         }
1258         err = 1;   /* osd or pg changed */
1259
1260 out:
1261         return err;
1262 }
1263
1264 /*
1265  * caller should hold map_sem (for read) and request_mutex
1266  */
1267 static void __send_request(struct ceph_osd_client *osdc,
1268                            struct ceph_osd_request *req)
1269 {
1270         void *p;
1271
1272         dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1273              req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1274              (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1275
1276         /* fill in message content that changes each time we send it */
1277         put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1278         put_unaligned_le32(req->r_flags, req->r_request_flags);
1279         put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
1280         p = req->r_request_pgid;
1281         ceph_encode_64(&p, req->r_pgid.pool);
1282         ceph_encode_32(&p, req->r_pgid.seed);
1283         put_unaligned_le64(1, req->r_request_attempts);  /* FIXME */
1284         memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1285                sizeof(req->r_reassert_version));
1286
1287         req->r_stamp = jiffies;
1288         list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1289
1290         ceph_msg_get(req->r_request); /* send consumes a ref */
1291         ceph_con_send(&req->r_osd->o_con, req->r_request);
1292         req->r_sent = req->r_osd->o_incarnation;
1293 }
1294
1295 /*
1296  * Send any requests in the queue (req_unsent).
1297  */
1298 static void __send_queued(struct ceph_osd_client *osdc)
1299 {
1300         struct ceph_osd_request *req, *tmp;
1301
1302         dout("__send_queued\n");
1303         list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1304                 __send_request(osdc, req);
1305 }
1306
1307 /*
1308  * Timeout callback, called every N seconds when 1 or more osd
1309  * requests has been active for more than N seconds.  When this
1310  * happens, we ping all OSDs with requests who have timed out to
1311  * ensure any communications channel reset is detected.  Reset the
1312  * request timeouts another N seconds in the future as we go.
1313  * Reschedule the timeout event another N seconds in future (unless
1314  * there are no open requests).
1315  */
1316 static void handle_timeout(struct work_struct *work)
1317 {
1318         struct ceph_osd_client *osdc =
1319                 container_of(work, struct ceph_osd_client, timeout_work.work);
1320         struct ceph_osd_request *req;
1321         struct ceph_osd *osd;
1322         unsigned long keepalive =
1323                 osdc->client->options->osd_keepalive_timeout * HZ;
1324         struct list_head slow_osds;
1325         dout("timeout\n");
1326         down_read(&osdc->map_sem);
1327
1328         ceph_monc_request_next_osdmap(&osdc->client->monc);
1329
1330         mutex_lock(&osdc->request_mutex);
1331
1332         /*
1333          * ping osds that are a bit slow.  this ensures that if there
1334          * is a break in the TCP connection we will notice, and reopen
1335          * a connection with that osd (from the fault callback).
1336          */
1337         INIT_LIST_HEAD(&slow_osds);
1338         list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1339                 if (time_before(jiffies, req->r_stamp + keepalive))
1340                         break;
1341
1342                 osd = req->r_osd;
1343                 BUG_ON(!osd);
1344                 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1345                      req->r_tid, osd->o_osd);
1346                 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1347         }
1348         while (!list_empty(&slow_osds)) {
1349                 osd = list_entry(slow_osds.next, struct ceph_osd,
1350                                  o_keepalive_item);
1351                 list_del_init(&osd->o_keepalive_item);
1352                 ceph_con_keepalive(&osd->o_con);
1353         }
1354
1355         __schedule_osd_timeout(osdc);
1356         __send_queued(osdc);
1357         mutex_unlock(&osdc->request_mutex);
1358         up_read(&osdc->map_sem);
1359 }
1360
1361 static void handle_osds_timeout(struct work_struct *work)
1362 {
1363         struct ceph_osd_client *osdc =
1364                 container_of(work, struct ceph_osd_client,
1365                              osds_timeout_work.work);
1366         unsigned long delay =
1367                 osdc->client->options->osd_idle_ttl * HZ >> 2;
1368
1369         dout("osds timeout\n");
1370         down_read(&osdc->map_sem);
1371         remove_old_osds(osdc);
1372         up_read(&osdc->map_sem);
1373
1374         schedule_delayed_work(&osdc->osds_timeout_work,
1375                               round_jiffies_relative(delay));
1376 }
1377
1378 static void complete_request(struct ceph_osd_request *req)
1379 {
1380         if (req->r_safe_callback)
1381                 req->r_safe_callback(req, NULL);
1382         complete_all(&req->r_safe_completion);  /* fsync waiter */
1383 }
1384
1385 /*
1386  * handle osd op reply.  either call the callback if it is specified,
1387  * or do the completion to wake up the waiting thread.
1388  */
1389 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1390                          struct ceph_connection *con)
1391 {
1392         void *p, *end;
1393         struct ceph_osd_request *req;
1394         u64 tid;
1395         int object_len;
1396         unsigned int numops;
1397         int payload_len, flags;
1398         s32 result;
1399         s32 retry_attempt;
1400         struct ceph_pg pg;
1401         int err;
1402         u32 reassert_epoch;
1403         u64 reassert_version;
1404         u32 osdmap_epoch;
1405         int already_completed;
1406         u32 bytes;
1407         unsigned int i;
1408
1409         tid = le64_to_cpu(msg->hdr.tid);
1410         dout("handle_reply %p tid %llu\n", msg, tid);
1411
1412         p = msg->front.iov_base;
1413         end = p + msg->front.iov_len;
1414
1415         ceph_decode_need(&p, end, 4, bad);
1416         object_len = ceph_decode_32(&p);
1417         ceph_decode_need(&p, end, object_len, bad);
1418         p += object_len;
1419
1420         err = ceph_decode_pgid(&p, end, &pg);
1421         if (err)
1422                 goto bad;
1423
1424         ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1425         flags = ceph_decode_64(&p);
1426         result = ceph_decode_32(&p);
1427         reassert_epoch = ceph_decode_32(&p);
1428         reassert_version = ceph_decode_64(&p);
1429         osdmap_epoch = ceph_decode_32(&p);
1430
1431         /* lookup */
1432         mutex_lock(&osdc->request_mutex);
1433         req = __lookup_request(osdc, tid);
1434         if (req == NULL) {
1435                 dout("handle_reply tid %llu dne\n", tid);
1436                 goto bad_mutex;
1437         }
1438         ceph_osdc_get_request(req);
1439
1440         dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1441              req, result);
1442
1443         ceph_decode_need(&p, end, 4, bad);
1444         numops = ceph_decode_32(&p);
1445         if (numops > CEPH_OSD_MAX_OP)
1446                 goto bad_put;
1447         if (numops != req->r_num_ops)
1448                 goto bad_put;
1449         payload_len = 0;
1450         ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad);
1451         for (i = 0; i < numops; i++) {
1452                 struct ceph_osd_op *op = p;
1453                 int len;
1454
1455                 len = le32_to_cpu(op->payload_len);
1456                 req->r_reply_op_len[i] = len;
1457                 dout(" op %d has %d bytes\n", i, len);
1458                 payload_len += len;
1459                 p += sizeof(*op);
1460         }
1461         bytes = le32_to_cpu(msg->hdr.data_len);
1462         if (payload_len != bytes) {
1463                 pr_warning("sum of op payload lens %d != data_len %d",
1464                            payload_len, bytes);
1465                 goto bad_put;
1466         }
1467
1468         ceph_decode_need(&p, end, 4 + numops * 4, bad);
1469         retry_attempt = ceph_decode_32(&p);
1470         for (i = 0; i < numops; i++)
1471                 req->r_reply_op_result[i] = ceph_decode_32(&p);
1472
1473         if (!req->r_got_reply) {
1474
1475                 req->r_result = result;
1476                 dout("handle_reply result %d bytes %d\n", req->r_result,
1477                      bytes);
1478                 if (req->r_result == 0)
1479                         req->r_result = bytes;
1480
1481                 /* in case this is a write and we need to replay, */
1482                 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1483                 req->r_reassert_version.version = cpu_to_le64(reassert_version);
1484
1485                 req->r_got_reply = 1;
1486         } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1487                 dout("handle_reply tid %llu dup ack\n", tid);
1488                 mutex_unlock(&osdc->request_mutex);
1489                 goto done;
1490         }
1491
1492         dout("handle_reply tid %llu flags %d\n", tid, flags);
1493
1494         if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1495                 __register_linger_request(osdc, req);
1496
1497         /* either this is a read, or we got the safe response */
1498         if (result < 0 ||
1499             (flags & CEPH_OSD_FLAG_ONDISK) ||
1500             ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1501                 __unregister_request(osdc, req);
1502
1503         already_completed = req->r_completed;
1504         req->r_completed = 1;
1505         mutex_unlock(&osdc->request_mutex);
1506         if (already_completed)
1507                 goto done;
1508
1509         if (req->r_callback)
1510                 req->r_callback(req, msg);
1511         else
1512                 complete_all(&req->r_completion);
1513
1514         if (flags & CEPH_OSD_FLAG_ONDISK)
1515                 complete_request(req);
1516
1517 done:
1518         dout("req=%p req->r_linger=%d\n", req, req->r_linger);
1519         ceph_osdc_put_request(req);
1520         return;
1521
1522 bad_put:
1523         ceph_osdc_put_request(req);
1524 bad_mutex:
1525         mutex_unlock(&osdc->request_mutex);
1526 bad:
1527         pr_err("corrupt osd_op_reply got %d %d\n",
1528                (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1529         ceph_msg_dump(msg);
1530 }
1531
1532 static void reset_changed_osds(struct ceph_osd_client *osdc)
1533 {
1534         struct rb_node *p, *n;
1535
1536         for (p = rb_first(&osdc->osds); p; p = n) {
1537                 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
1538
1539                 n = rb_next(p);
1540                 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1541                     memcmp(&osd->o_con.peer_addr,
1542                            ceph_osd_addr(osdc->osdmap,
1543                                          osd->o_osd),
1544                            sizeof(struct ceph_entity_addr)) != 0)
1545                         __reset_osd(osdc, osd);
1546         }
1547 }
1548
1549 /*
1550  * Requeue requests whose mapping to an OSD has changed.  If requests map to
1551  * no osd, request a new map.
1552  *
1553  * Caller should hold map_sem for read.
1554  */
1555 static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1556 {
1557         struct ceph_osd_request *req, *nreq;
1558         struct rb_node *p;
1559         int needmap = 0;
1560         int err;
1561
1562         dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1563         mutex_lock(&osdc->request_mutex);
1564         for (p = rb_first(&osdc->requests); p; ) {
1565                 req = rb_entry(p, struct ceph_osd_request, r_node);
1566                 p = rb_next(p);
1567
1568                 /*
1569                  * For linger requests that have not yet been
1570                  * registered, move them to the linger list; they'll
1571                  * be sent to the osd in the loop below.  Unregister
1572                  * the request before re-registering it as a linger
1573                  * request to ensure the __map_request() below
1574                  * will decide it needs to be sent.
1575                  */
1576                 if (req->r_linger && list_empty(&req->r_linger_item)) {
1577                         dout("%p tid %llu restart on osd%d\n",
1578                              req, req->r_tid,
1579                              req->r_osd ? req->r_osd->o_osd : -1);
1580                         __unregister_request(osdc, req);
1581                         __register_linger_request(osdc, req);
1582                         continue;
1583                 }
1584
1585                 err = __map_request(osdc, req, force_resend);
1586                 if (err < 0)
1587                         continue;  /* error */
1588                 if (req->r_osd == NULL) {
1589                         dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1590                         needmap++;  /* request a newer map */
1591                 } else if (err > 0) {
1592                         if (!req->r_linger) {
1593                                 dout("%p tid %llu requeued on osd%d\n", req,
1594                                      req->r_tid,
1595                                      req->r_osd ? req->r_osd->o_osd : -1);
1596                                 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1597                         }
1598                 }
1599         }
1600
1601         list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1602                                  r_linger_item) {
1603                 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1604
1605                 err = __map_request(osdc, req, force_resend);
1606                 dout("__map_request returned %d\n", err);
1607                 if (err == 0)
1608                         continue;  /* no change and no osd was specified */
1609                 if (err < 0)
1610                         continue;  /* hrm! */
1611                 if (req->r_osd == NULL) {
1612                         dout("tid %llu maps to no valid osd\n", req->r_tid);
1613                         needmap++;  /* request a newer map */
1614                         continue;
1615                 }
1616
1617                 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1618                      req->r_osd ? req->r_osd->o_osd : -1);
1619                 __register_request(osdc, req);
1620                 __unregister_linger_request(osdc, req);
1621         }
1622         mutex_unlock(&osdc->request_mutex);
1623
1624         if (needmap) {
1625                 dout("%d requests for down osds, need new map\n", needmap);
1626                 ceph_monc_request_next_osdmap(&osdc->client->monc);
1627         }
1628         reset_changed_osds(osdc);
1629 }
1630
1631
1632 /*
1633  * Process updated osd map.
1634  *
1635  * The message contains any number of incremental and full maps, normally
1636  * indicating some sort of topology change in the cluster.  Kick requests
1637  * off to different OSDs as needed.
1638  */
1639 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1640 {
1641         void *p, *end, *next;
1642         u32 nr_maps, maplen;
1643         u32 epoch;
1644         struct ceph_osdmap *newmap = NULL, *oldmap;
1645         int err;
1646         struct ceph_fsid fsid;
1647
1648         dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1649         p = msg->front.iov_base;
1650         end = p + msg->front.iov_len;
1651
1652         /* verify fsid */
1653         ceph_decode_need(&p, end, sizeof(fsid), bad);
1654         ceph_decode_copy(&p, &fsid, sizeof(fsid));
1655         if (ceph_check_fsid(osdc->client, &fsid) < 0)
1656                 return;
1657
1658         down_write(&osdc->map_sem);
1659
1660         /* incremental maps */
1661         ceph_decode_32_safe(&p, end, nr_maps, bad);
1662         dout(" %d inc maps\n", nr_maps);
1663         while (nr_maps > 0) {
1664                 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1665                 epoch = ceph_decode_32(&p);
1666                 maplen = ceph_decode_32(&p);
1667                 ceph_decode_need(&p, end, maplen, bad);
1668                 next = p + maplen;
1669                 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1670                         dout("applying incremental map %u len %d\n",
1671                              epoch, maplen);
1672                         newmap = osdmap_apply_incremental(&p, next,
1673                                                           osdc->osdmap,
1674                                                           &osdc->client->msgr);
1675                         if (IS_ERR(newmap)) {
1676                                 err = PTR_ERR(newmap);
1677                                 goto bad;
1678                         }
1679                         BUG_ON(!newmap);
1680                         if (newmap != osdc->osdmap) {
1681                                 ceph_osdmap_destroy(osdc->osdmap);
1682                                 osdc->osdmap = newmap;
1683                         }
1684                         kick_requests(osdc, 0);
1685                 } else {
1686                         dout("ignoring incremental map %u len %d\n",
1687                              epoch, maplen);
1688                 }
1689                 p = next;
1690                 nr_maps--;
1691         }
1692         if (newmap)
1693                 goto done;
1694
1695         /* full maps */
1696         ceph_decode_32_safe(&p, end, nr_maps, bad);
1697         dout(" %d full maps\n", nr_maps);
1698         while (nr_maps) {
1699                 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1700                 epoch = ceph_decode_32(&p);
1701                 maplen = ceph_decode_32(&p);
1702                 ceph_decode_need(&p, end, maplen, bad);
1703                 if (nr_maps > 1) {
1704                         dout("skipping non-latest full map %u len %d\n",
1705                              epoch, maplen);
1706                 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1707                         dout("skipping full map %u len %d, "
1708                              "older than our %u\n", epoch, maplen,
1709                              osdc->osdmap->epoch);
1710                 } else {
1711                         int skipped_map = 0;
1712
1713                         dout("taking full map %u len %d\n", epoch, maplen);
1714                         newmap = osdmap_decode(&p, p+maplen);
1715                         if (IS_ERR(newmap)) {
1716                                 err = PTR_ERR(newmap);
1717                                 goto bad;
1718                         }
1719                         BUG_ON(!newmap);
1720                         oldmap = osdc->osdmap;
1721                         osdc->osdmap = newmap;
1722                         if (oldmap) {
1723                                 if (oldmap->epoch + 1 < newmap->epoch)
1724                                         skipped_map = 1;
1725                                 ceph_osdmap_destroy(oldmap);
1726                         }
1727                         kick_requests(osdc, skipped_map);
1728                 }
1729                 p += maplen;
1730                 nr_maps--;
1731         }
1732
1733 done:
1734         downgrade_write(&osdc->map_sem);
1735         ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1736
1737         /*
1738          * subscribe to subsequent osdmap updates if full to ensure
1739          * we find out when we are no longer full and stop returning
1740          * ENOSPC.
1741          */
1742         if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
1743                 ceph_monc_request_next_osdmap(&osdc->client->monc);
1744
1745         mutex_lock(&osdc->request_mutex);
1746         __send_queued(osdc);
1747         mutex_unlock(&osdc->request_mutex);
1748         up_read(&osdc->map_sem);
1749         wake_up_all(&osdc->client->auth_wq);
1750         return;
1751
1752 bad:
1753         pr_err("osdc handle_map corrupt msg\n");
1754         ceph_msg_dump(msg);
1755         up_write(&osdc->map_sem);
1756         return;
1757 }
1758
1759 /*
1760  * watch/notify callback event infrastructure
1761  *
1762  * These callbacks are used both for watch and notify operations.
1763  */
1764 static void __release_event(struct kref *kref)
1765 {
1766         struct ceph_osd_event *event =
1767                 container_of(kref, struct ceph_osd_event, kref);
1768
1769         dout("__release_event %p\n", event);
1770         kfree(event);
1771 }
1772
1773 static void get_event(struct ceph_osd_event *event)
1774 {
1775         kref_get(&event->kref);
1776 }
1777
1778 void ceph_osdc_put_event(struct ceph_osd_event *event)
1779 {
1780         kref_put(&event->kref, __release_event);
1781 }
1782 EXPORT_SYMBOL(ceph_osdc_put_event);
1783
1784 static void __insert_event(struct ceph_osd_client *osdc,
1785                              struct ceph_osd_event *new)
1786 {
1787         struct rb_node **p = &osdc->event_tree.rb_node;
1788         struct rb_node *parent = NULL;
1789         struct ceph_osd_event *event = NULL;
1790
1791         while (*p) {
1792                 parent = *p;
1793                 event = rb_entry(parent, struct ceph_osd_event, node);
1794                 if (new->cookie < event->cookie)
1795                         p = &(*p)->rb_left;
1796                 else if (new->cookie > event->cookie)
1797                         p = &(*p)->rb_right;
1798                 else
1799                         BUG();
1800         }
1801
1802         rb_link_node(&new->node, parent, p);
1803         rb_insert_color(&new->node, &osdc->event_tree);
1804 }
1805
1806 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1807                                                 u64 cookie)
1808 {
1809         struct rb_node **p = &osdc->event_tree.rb_node;
1810         struct rb_node *parent = NULL;
1811         struct ceph_osd_event *event = NULL;
1812
1813         while (*p) {
1814                 parent = *p;
1815                 event = rb_entry(parent, struct ceph_osd_event, node);
1816                 if (cookie < event->cookie)
1817                         p = &(*p)->rb_left;
1818                 else if (cookie > event->cookie)
1819                         p = &(*p)->rb_right;
1820                 else
1821                         return event;
1822         }
1823         return NULL;
1824 }
1825
1826 static void __remove_event(struct ceph_osd_event *event)
1827 {
1828         struct ceph_osd_client *osdc = event->osdc;
1829
1830         if (!RB_EMPTY_NODE(&event->node)) {
1831                 dout("__remove_event removed %p\n", event);
1832                 rb_erase(&event->node, &osdc->event_tree);
1833                 ceph_osdc_put_event(event);
1834         } else {
1835                 dout("__remove_event didn't remove %p\n", event);
1836         }
1837 }
1838
1839 int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1840                            void (*event_cb)(u64, u64, u8, void *),
1841                            void *data, struct ceph_osd_event **pevent)
1842 {
1843         struct ceph_osd_event *event;
1844
1845         event = kmalloc(sizeof(*event), GFP_NOIO);
1846         if (!event)
1847                 return -ENOMEM;
1848
1849         dout("create_event %p\n", event);
1850         event->cb = event_cb;
1851         event->one_shot = 0;
1852         event->data = data;
1853         event->osdc = osdc;
1854         INIT_LIST_HEAD(&event->osd_node);
1855         RB_CLEAR_NODE(&event->node);
1856         kref_init(&event->kref);   /* one ref for us */
1857         kref_get(&event->kref);    /* one ref for the caller */
1858
1859         spin_lock(&osdc->event_lock);
1860         event->cookie = ++osdc->event_count;
1861         __insert_event(osdc, event);
1862         spin_unlock(&osdc->event_lock);
1863
1864         *pevent = event;
1865         return 0;
1866 }
1867 EXPORT_SYMBOL(ceph_osdc_create_event);
1868
1869 void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1870 {
1871         struct ceph_osd_client *osdc = event->osdc;
1872
1873         dout("cancel_event %p\n", event);
1874         spin_lock(&osdc->event_lock);
1875         __remove_event(event);
1876         spin_unlock(&osdc->event_lock);
1877         ceph_osdc_put_event(event); /* caller's */
1878 }
1879 EXPORT_SYMBOL(ceph_osdc_cancel_event);
1880
1881
1882 static void do_event_work(struct work_struct *work)
1883 {
1884         struct ceph_osd_event_work *event_work =
1885                 container_of(work, struct ceph_osd_event_work, work);
1886         struct ceph_osd_event *event = event_work->event;
1887         u64 ver = event_work->ver;
1888         u64 notify_id = event_work->notify_id;
1889         u8 opcode = event_work->opcode;
1890
1891         dout("do_event_work completing %p\n", event);
1892         event->cb(ver, notify_id, opcode, event->data);
1893         dout("do_event_work completed %p\n", event);
1894         ceph_osdc_put_event(event);
1895         kfree(event_work);
1896 }
1897
1898
1899 /*
1900  * Process osd watch notifications
1901  */
1902 static void handle_watch_notify(struct ceph_osd_client *osdc,
1903                                 struct ceph_msg *msg)
1904 {
1905         void *p, *end;
1906         u8 proto_ver;
1907         u64 cookie, ver, notify_id;
1908         u8 opcode;
1909         struct ceph_osd_event *event;
1910         struct ceph_osd_event_work *event_work;
1911
1912         p = msg->front.iov_base;
1913         end = p + msg->front.iov_len;
1914
1915         ceph_decode_8_safe(&p, end, proto_ver, bad);
1916         ceph_decode_8_safe(&p, end, opcode, bad);
1917         ceph_decode_64_safe(&p, end, cookie, bad);
1918         ceph_decode_64_safe(&p, end, ver, bad);
1919         ceph_decode_64_safe(&p, end, notify_id, bad);
1920
1921         spin_lock(&osdc->event_lock);
1922         event = __find_event(osdc, cookie);
1923         if (event) {
1924                 BUG_ON(event->one_shot);
1925                 get_event(event);
1926         }
1927         spin_unlock(&osdc->event_lock);
1928         dout("handle_watch_notify cookie %lld ver %lld event %p\n",
1929              cookie, ver, event);
1930         if (event) {
1931                 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
1932                 if (!event_work) {
1933                         dout("ERROR: could not allocate event_work\n");
1934                         goto done_err;
1935                 }
1936                 INIT_WORK(&event_work->work, do_event_work);
1937                 event_work->event = event;
1938                 event_work->ver = ver;
1939                 event_work->notify_id = notify_id;
1940                 event_work->opcode = opcode;
1941                 if (!queue_work(osdc->notify_wq, &event_work->work)) {
1942                         dout("WARNING: failed to queue notify event work\n");
1943                         goto done_err;
1944                 }
1945         }
1946
1947         return;
1948
1949 done_err:
1950         ceph_osdc_put_event(event);
1951         return;
1952
1953 bad:
1954         pr_err("osdc handle_watch_notify corrupt msg\n");
1955         return;
1956 }
1957
1958 /*
1959  * build new request AND message
1960  *
1961  */
1962 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
1963                                 struct ceph_snap_context *snapc, u64 snap_id,
1964                                 struct timespec *mtime)
1965 {
1966         struct ceph_msg *msg = req->r_request;
1967         void *p;
1968         size_t msg_size;
1969         int flags = req->r_flags;
1970         u64 data_len;
1971         unsigned int i;
1972
1973         req->r_snapid = snap_id;
1974         req->r_snapc = ceph_get_snap_context(snapc);
1975
1976         /* encode request */
1977         msg->hdr.version = cpu_to_le16(4);
1978
1979         p = msg->front.iov_base;
1980         ceph_encode_32(&p, 1);   /* client_inc  is always 1 */
1981         req->r_request_osdmap_epoch = p;
1982         p += 4;
1983         req->r_request_flags = p;
1984         p += 4;
1985         if (req->r_flags & CEPH_OSD_FLAG_WRITE)
1986                 ceph_encode_timespec(p, mtime);
1987         p += sizeof(struct ceph_timespec);
1988         req->r_request_reassert_version = p;
1989         p += sizeof(struct ceph_eversion); /* will get filled in */
1990
1991         /* oloc */
1992         ceph_encode_8(&p, 4);
1993         ceph_encode_8(&p, 4);
1994         ceph_encode_32(&p, 8 + 4 + 4);
1995         req->r_request_pool = p;
1996         p += 8;
1997         ceph_encode_32(&p, -1);  /* preferred */
1998         ceph_encode_32(&p, 0);   /* key len */
1999
2000         ceph_encode_8(&p, 1);
2001         req->r_request_pgid = p;
2002         p += 8 + 4;
2003         ceph_encode_32(&p, -1);  /* preferred */
2004
2005         /* oid */
2006         ceph_encode_32(&p, req->r_oid_len);
2007         memcpy(p, req->r_oid, req->r_oid_len);
2008         dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
2009         p += req->r_oid_len;
2010
2011         /* ops--can imply data */
2012         ceph_encode_16(&p, (u16)req->r_num_ops);
2013         data_len = 0;
2014         for (i = 0; i < req->r_num_ops; i++) {
2015                 data_len += osd_req_encode_op(req, p, i);
2016                 p += sizeof(struct ceph_osd_op);
2017         }
2018
2019         /* snaps */
2020         ceph_encode_64(&p, req->r_snapid);
2021         ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2022         ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2023         if (req->r_snapc) {
2024                 for (i = 0; i < snapc->num_snaps; i++) {
2025                         ceph_encode_64(&p, req->r_snapc->snaps[i]);
2026                 }
2027         }
2028
2029         req->r_request_attempts = p;
2030         p += 4;
2031
2032         /* data */
2033         if (flags & CEPH_OSD_FLAG_WRITE) {
2034                 u16 data_off;
2035
2036                 /*
2037                  * The header "data_off" is a hint to the receiver
2038                  * allowing it to align received data into its
2039                  * buffers such that there's no need to re-copy
2040                  * it before writing it to disk (direct I/O).
2041                  */
2042                 data_off = (u16) (off & 0xffff);
2043                 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2044         }
2045         req->r_request->hdr.data_len = cpu_to_le32(data_len);
2046
2047         BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2048         msg_size = p - msg->front.iov_base;
2049         msg->front.iov_len = msg_size;
2050         msg->hdr.front_len = cpu_to_le32(msg_size);
2051
2052         dout("build_request msg_size was %d\n", (int)msg_size);
2053 }
2054 EXPORT_SYMBOL(ceph_osdc_build_request);
2055
2056 /*
2057  * Register request, send initial attempt.
2058  */
2059 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2060                             struct ceph_osd_request *req,
2061                             bool nofail)
2062 {
2063         int rc = 0;
2064
2065         down_read(&osdc->map_sem);
2066         mutex_lock(&osdc->request_mutex);
2067         __register_request(osdc, req);
2068         WARN_ON(req->r_sent);
2069         rc = __map_request(osdc, req, 0);
2070         if (rc < 0) {
2071                 if (nofail) {
2072                         dout("osdc_start_request failed map, "
2073                                 " will retry %lld\n", req->r_tid);
2074                         rc = 0;
2075                 }
2076                 goto out_unlock;
2077         }
2078         if (req->r_osd == NULL) {
2079                 dout("send_request %p no up osds in pg\n", req);
2080                 ceph_monc_request_next_osdmap(&osdc->client->monc);
2081         } else {
2082                 __send_queued(osdc);
2083         }
2084         rc = 0;
2085 out_unlock:
2086         mutex_unlock(&osdc->request_mutex);
2087         up_read(&osdc->map_sem);
2088         return rc;
2089 }
2090 EXPORT_SYMBOL(ceph_osdc_start_request);
2091
2092 /*
2093  * wait for a request to complete
2094  */
2095 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2096                            struct ceph_osd_request *req)
2097 {
2098         int rc;
2099
2100         rc = wait_for_completion_interruptible(&req->r_completion);
2101         if (rc < 0) {
2102                 mutex_lock(&osdc->request_mutex);
2103                 __cancel_request(req);
2104                 __unregister_request(osdc, req);
2105                 mutex_unlock(&osdc->request_mutex);
2106                 complete_request(req);
2107                 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
2108                 return rc;
2109         }
2110
2111         dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2112         return req->r_result;
2113 }
2114 EXPORT_SYMBOL(ceph_osdc_wait_request);
2115
2116 /*
2117  * sync - wait for all in-flight requests to flush.  avoid starvation.
2118  */
2119 void ceph_osdc_sync(struct ceph_osd_client *osdc)
2120 {
2121         struct ceph_osd_request *req;
2122         u64 last_tid, next_tid = 0;
2123
2124         mutex_lock(&osdc->request_mutex);
2125         last_tid = osdc->last_tid;
2126         while (1) {
2127                 req = __lookup_request_ge(osdc, next_tid);
2128                 if (!req)
2129                         break;
2130                 if (req->r_tid > last_tid)
2131                         break;
2132
2133                 next_tid = req->r_tid + 1;
2134                 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2135                         continue;
2136
2137                 ceph_osdc_get_request(req);
2138                 mutex_unlock(&osdc->request_mutex);
2139                 dout("sync waiting on tid %llu (last is %llu)\n",
2140                      req->r_tid, last_tid);
2141                 wait_for_completion(&req->r_safe_completion);
2142                 mutex_lock(&osdc->request_mutex);
2143                 ceph_osdc_put_request(req);
2144         }
2145         mutex_unlock(&osdc->request_mutex);
2146         dout("sync done (thru tid %llu)\n", last_tid);
2147 }
2148 EXPORT_SYMBOL(ceph_osdc_sync);
2149
2150 /*
2151  * init, shutdown
2152  */
2153 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2154 {
2155         int err;
2156
2157         dout("init\n");
2158         osdc->client = client;
2159         osdc->osdmap = NULL;
2160         init_rwsem(&osdc->map_sem);
2161         init_completion(&osdc->map_waiters);
2162         osdc->last_requested_map = 0;
2163         mutex_init(&osdc->request_mutex);
2164         osdc->last_tid = 0;
2165         osdc->osds = RB_ROOT;
2166         INIT_LIST_HEAD(&osdc->osd_lru);
2167         osdc->requests = RB_ROOT;
2168         INIT_LIST_HEAD(&osdc->req_lru);
2169         INIT_LIST_HEAD(&osdc->req_unsent);
2170         INIT_LIST_HEAD(&osdc->req_notarget);
2171         INIT_LIST_HEAD(&osdc->req_linger);
2172         osdc->num_requests = 0;
2173         INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2174         INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2175         spin_lock_init(&osdc->event_lock);
2176         osdc->event_tree = RB_ROOT;
2177         osdc->event_count = 0;
2178
2179         schedule_delayed_work(&osdc->osds_timeout_work,
2180            round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
2181
2182         err = -ENOMEM;
2183         osdc->req_mempool = mempool_create_kmalloc_pool(10,
2184                                         sizeof(struct ceph_osd_request));
2185         if (!osdc->req_mempool)
2186                 goto out;
2187
2188         err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2189                                 OSD_OP_FRONT_LEN, 10, true,
2190                                 "osd_op");
2191         if (err < 0)
2192                 goto out_mempool;
2193         err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2194                                 OSD_OPREPLY_FRONT_LEN, 10, true,
2195                                 "osd_op_reply");
2196         if (err < 0)
2197                 goto out_msgpool;
2198
2199         osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2200         if (IS_ERR(osdc->notify_wq)) {
2201                 err = PTR_ERR(osdc->notify_wq);
2202                 osdc->notify_wq = NULL;
2203                 goto out_msgpool;
2204         }
2205         return 0;
2206
2207 out_msgpool:
2208         ceph_msgpool_destroy(&osdc->msgpool_op);
2209 out_mempool:
2210         mempool_destroy(osdc->req_mempool);
2211 out:
2212         return err;
2213 }
2214
2215 void ceph_osdc_stop(struct ceph_osd_client *osdc)
2216 {
2217         flush_workqueue(osdc->notify_wq);
2218         destroy_workqueue(osdc->notify_wq);
2219         cancel_delayed_work_sync(&osdc->timeout_work);
2220         cancel_delayed_work_sync(&osdc->osds_timeout_work);
2221         if (osdc->osdmap) {
2222                 ceph_osdmap_destroy(osdc->osdmap);
2223                 osdc->osdmap = NULL;
2224         }
2225         remove_all_osds(osdc);
2226         mempool_destroy(osdc->req_mempool);
2227         ceph_msgpool_destroy(&osdc->msgpool_op);
2228         ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2229 }
2230
2231 /*
2232  * Read some contiguous pages.  If we cross a stripe boundary, shorten
2233  * *plen.  Return number of bytes read, or error.
2234  */
2235 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2236                         struct ceph_vino vino, struct ceph_file_layout *layout,
2237                         u64 off, u64 *plen,
2238                         u32 truncate_seq, u64 truncate_size,
2239                         struct page **pages, int num_pages, int page_align)
2240 {
2241         struct ceph_osd_request *req;
2242         int rc = 0;
2243
2244         dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2245              vino.snap, off, *plen);
2246         req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
2247                                     CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2248                                     NULL, truncate_seq, truncate_size,
2249                                     false);
2250         if (IS_ERR(req))
2251                 return PTR_ERR(req);
2252
2253         /* it may be a short read due to an object boundary */
2254
2255         osd_req_op_extent_osd_data_pages(req, 0, false,
2256                                 pages, *plen, page_align, false, false);
2257
2258         dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2259              off, *plen, *plen, page_align);
2260
2261         ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2262
2263         rc = ceph_osdc_start_request(osdc, req, false);
2264         if (!rc)
2265                 rc = ceph_osdc_wait_request(osdc, req);
2266
2267         ceph_osdc_put_request(req);
2268         dout("readpages result %d\n", rc);
2269         return rc;
2270 }
2271 EXPORT_SYMBOL(ceph_osdc_readpages);
2272
2273 /*
2274  * do a synchronous write on N pages
2275  */
2276 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2277                          struct ceph_file_layout *layout,
2278                          struct ceph_snap_context *snapc,
2279                          u64 off, u64 len,
2280                          u32 truncate_seq, u64 truncate_size,
2281                          struct timespec *mtime,
2282                          struct page **pages, int num_pages)
2283 {
2284         struct ceph_osd_request *req;
2285         int rc = 0;
2286         int page_align = off & ~PAGE_MASK;
2287
2288         BUG_ON(vino.snap != CEPH_NOSNAP);       /* snapshots aren't writeable */
2289         req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
2290                                     CEPH_OSD_OP_WRITE,
2291                                     CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2292                                     snapc, truncate_seq, truncate_size,
2293                                     true);
2294         if (IS_ERR(req))
2295                 return PTR_ERR(req);
2296
2297         /* it may be a short write due to an object boundary */
2298         osd_req_op_extent_osd_data_pages(req, 0, true, pages, len, page_align,
2299                                 false, false);
2300         dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
2301
2302         ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2303
2304         rc = ceph_osdc_start_request(osdc, req, true);
2305         if (!rc)
2306                 rc = ceph_osdc_wait_request(osdc, req);
2307
2308         ceph_osdc_put_request(req);
2309         if (rc == 0)
2310                 rc = len;
2311         dout("writepages result %d\n", rc);
2312         return rc;
2313 }
2314 EXPORT_SYMBOL(ceph_osdc_writepages);
2315
2316 /*
2317  * handle incoming message
2318  */
2319 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2320 {
2321         struct ceph_osd *osd = con->private;
2322         struct ceph_osd_client *osdc;
2323         int type = le16_to_cpu(msg->hdr.type);
2324
2325         if (!osd)
2326                 goto out;
2327         osdc = osd->o_osdc;
2328
2329         switch (type) {
2330         case CEPH_MSG_OSD_MAP:
2331                 ceph_osdc_handle_map(osdc, msg);
2332                 break;
2333         case CEPH_MSG_OSD_OPREPLY:
2334                 handle_reply(osdc, msg, con);
2335                 break;
2336         case CEPH_MSG_WATCH_NOTIFY:
2337                 handle_watch_notify(osdc, msg);
2338                 break;
2339
2340         default:
2341                 pr_err("received unknown message type %d %s\n", type,
2342                        ceph_msg_type_name(type));
2343         }
2344 out:
2345         ceph_msg_put(msg);
2346 }
2347
2348 /*
2349  * lookup and return message for incoming reply.  set up reply message
2350  * pages.
2351  */
2352 static struct ceph_msg *get_reply(struct ceph_connection *con,
2353                                   struct ceph_msg_header *hdr,
2354                                   int *skip)
2355 {
2356         struct ceph_osd *osd = con->private;
2357         struct ceph_osd_client *osdc = osd->o_osdc;
2358         struct ceph_msg *m;
2359         struct ceph_osd_request *req;
2360         int front = le32_to_cpu(hdr->front_len);
2361         int data_len = le32_to_cpu(hdr->data_len);
2362         u64 tid;
2363
2364         tid = le64_to_cpu(hdr->tid);
2365         mutex_lock(&osdc->request_mutex);
2366         req = __lookup_request(osdc, tid);
2367         if (!req) {
2368                 *skip = 1;
2369                 m = NULL;
2370                 dout("get_reply unknown tid %llu from osd%d\n", tid,
2371                      osd->o_osd);
2372                 goto out;
2373         }
2374
2375         if (req->r_reply->con)
2376                 dout("%s revoking msg %p from old con %p\n", __func__,
2377                      req->r_reply, req->r_reply->con);
2378         ceph_msg_revoke_incoming(req->r_reply);
2379
2380         if (front > req->r_reply->front.iov_len) {
2381                 pr_warning("get_reply front %d > preallocated %d\n",
2382                            front, (int)req->r_reply->front.iov_len);
2383                 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2384                 if (!m)
2385                         goto out;
2386                 ceph_msg_put(req->r_reply);
2387                 req->r_reply = m;
2388         }
2389         m = ceph_msg_get(req->r_reply);
2390
2391         if (data_len > 0) {
2392                 struct ceph_osd_data *osd_data;
2393
2394                 /*
2395                  * XXX This is assuming there is only one op containing
2396                  * XXX page data.  Probably OK for reads, but this
2397                  * XXX ought to be done more generally.
2398                  */
2399                 osd_data = osd_req_op_extent_osd_data(req, 0, false);
2400                 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
2401                         if (osd_data->pages &&
2402                                 unlikely(osd_data->length < data_len)) {
2403
2404                                 pr_warning("tid %lld reply has %d bytes "
2405                                         "we had only %llu bytes ready\n",
2406                                         tid, data_len, osd_data->length);
2407                                 *skip = 1;
2408                                 ceph_msg_put(m);
2409                                 m = NULL;
2410                                 goto out;
2411                         }
2412                 }
2413         }
2414         *skip = 0;
2415         dout("get_reply tid %lld %p\n", tid, m);
2416
2417 out:
2418         mutex_unlock(&osdc->request_mutex);
2419         return m;
2420
2421 }
2422
2423 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2424                                   struct ceph_msg_header *hdr,
2425                                   int *skip)
2426 {
2427         struct ceph_osd *osd = con->private;
2428         int type = le16_to_cpu(hdr->type);
2429         int front = le32_to_cpu(hdr->front_len);
2430
2431         *skip = 0;
2432         switch (type) {
2433         case CEPH_MSG_OSD_MAP:
2434         case CEPH_MSG_WATCH_NOTIFY:
2435                 return ceph_msg_new(type, front, GFP_NOFS, false);
2436         case CEPH_MSG_OSD_OPREPLY:
2437                 return get_reply(con, hdr, skip);
2438         default:
2439                 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2440                         osd->o_osd);
2441                 *skip = 1;
2442                 return NULL;
2443         }
2444 }
2445
2446 /*
2447  * Wrappers to refcount containing ceph_osd struct
2448  */
2449 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2450 {
2451         struct ceph_osd *osd = con->private;
2452         if (get_osd(osd))
2453                 return con;
2454         return NULL;
2455 }
2456
2457 static void put_osd_con(struct ceph_connection *con)
2458 {
2459         struct ceph_osd *osd = con->private;
2460         put_osd(osd);
2461 }
2462
2463 /*
2464  * authentication
2465  */
2466 /*
2467  * Note: returned pointer is the address of a structure that's
2468  * managed separately.  Caller must *not* attempt to free it.
2469  */
2470 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
2471                                         int *proto, int force_new)
2472 {
2473         struct ceph_osd *o = con->private;
2474         struct ceph_osd_client *osdc = o->o_osdc;
2475         struct ceph_auth_client *ac = osdc->client->monc.auth;
2476         struct ceph_auth_handshake *auth = &o->o_auth;
2477
2478         if (force_new && auth->authorizer) {
2479                 ceph_auth_destroy_authorizer(ac, auth->authorizer);
2480                 auth->authorizer = NULL;
2481         }
2482         if (!auth->authorizer) {
2483                 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2484                                                       auth);
2485                 if (ret)
2486                         return ERR_PTR(ret);
2487         } else {
2488                 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2489                                                      auth);
2490                 if (ret)
2491                         return ERR_PTR(ret);
2492         }
2493         *proto = ac->protocol;
2494
2495         return auth;
2496 }
2497
2498
2499 static int verify_authorizer_reply(struct ceph_connection *con, int len)
2500 {
2501         struct ceph_osd *o = con->private;
2502         struct ceph_osd_client *osdc = o->o_osdc;
2503         struct ceph_auth_client *ac = osdc->client->monc.auth;
2504
2505         return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2506 }
2507
2508 static int invalidate_authorizer(struct ceph_connection *con)
2509 {
2510         struct ceph_osd *o = con->private;
2511         struct ceph_osd_client *osdc = o->o_osdc;
2512         struct ceph_auth_client *ac = osdc->client->monc.auth;
2513
2514         ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2515         return ceph_monc_validate_auth(&osdc->client->monc);
2516 }
2517
2518 static const struct ceph_connection_operations osd_con_ops = {
2519         .get = get_osd_con,
2520         .put = put_osd_con,
2521         .dispatch = dispatch,
2522         .get_authorizer = get_authorizer,
2523         .verify_authorizer_reply = verify_authorizer_reply,
2524         .invalidate_authorizer = invalidate_authorizer,
2525         .alloc_msg = alloc_msg,
2526         .fault = osd_reset,
2527 };