fs/afs/yfsclient.c

   1 /* YFS File Server client stubs
   2  *
   3  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/slab.h>
  14 #include <linux/sched.h>
  15 #include <linux/circ_buf.h>
  16 #include <linux/iversion.h>
  17 #include "internal.h"
  18 #include "afs_fs.h"
  19 #include "xdr_fs.h"
  20 #include "protocol_yfs.h"
  21
  22 static const struct afs_fid afs_zero_fid;
  23
  24 static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
  25 {
  26         call->cbi = afs_get_cb_interest(cbi);
  27 }
  28
  29 #define xdr_size(x) (sizeof(*x) / sizeof(__be32))
  30
  31 static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
  32 {
  33         const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
  34
  35         fid->vid        = xdr_to_u64(x->volume);
  36         fid->vnode      = xdr_to_u64(x->vnode.lo);
  37         fid->vnode_hi   = ntohl(x->vnode.hi);
  38         fid->unique     = ntohl(x->vnode.unique);
  39         *_bp += xdr_size(x);
  40 }
  41
  42 static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
  43 {
  44         *bp++ = htonl(n);
  45         return bp;
  46 }
  47
  48 static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
  49 {
  50         struct yfs_xdr_u64 *x = (void *)bp;
  51
  52         *x = u64_to_xdr(n);
  53         return bp + xdr_size(x);
  54 }
  55
  56 static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
  57 {
  58         struct yfs_xdr_YFSFid *x = (void *)bp;
  59
  60         x->volume       = u64_to_xdr(fid->vid);
  61         x->vnode.lo     = u64_to_xdr(fid->vnode);
  62         x->vnode.hi     = htonl(fid->vnode_hi);
  63         x->vnode.unique = htonl(fid->unique);
  64         return bp + xdr_size(x);
  65 }
  66
  67 static size_t xdr_strlen(unsigned int len)
  68 {
  69         return sizeof(__be32) + round_up(len, sizeof(__be32));
  70 }
  71
  72 static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
  73 {
  74         bp = xdr_encode_u32(bp, len);
  75         bp = memcpy(bp, p, len);
  76         if (len & 3) {
  77                 unsigned int pad = 4 - (len & 3);
  78
  79                 memset((u8 *)bp + len, 0, pad);
  80                 len += pad;
  81         }
  82
  83         return bp + len / sizeof(__be32);
  84 }
  85
  86 static s64 linux_to_yfs_time(const struct timespec64 *t)
  87 {
  88         /* Convert to 100ns intervals. */
  89         return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
  90 }
  91
  92 static __be32 *xdr_encode_YFSStoreStatus_mode(__be32 *bp, mode_t mode)
  93 {
  94         struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
  95
  96         x->mask         = htonl(AFS_SET_MODE);
  97         x->mode         = htonl(mode & S_IALLUGO);
  98         x->mtime_client = u64_to_xdr(0);
  99         x->owner        = u64_to_xdr(0);
 100         x->group        = u64_to_xdr(0);
 101         return bp + xdr_size(x);
 102 }
 103
 104 static __be32 *xdr_encode_YFSStoreStatus_mtime(__be32 *bp, const struct timespec64 *t)
 105 {
 106         struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
 107         s64 mtime = linux_to_yfs_time(t);
 108
 109         x->mask         = htonl(AFS_SET_MTIME);
 110         x->mode         = htonl(0);
 111         x->mtime_client = u64_to_xdr(mtime);
 112         x->owner        = u64_to_xdr(0);
 113         x->group        = u64_to_xdr(0);
 114         return bp + xdr_size(x);
 115 }
 116
 117 /*
 118  * Convert a signed 100ns-resolution 64-bit time into a timespec.
 119  */
 120 static struct timespec64 yfs_time_to_linux(s64 t)
 121 {
 122         struct timespec64 ts;
 123         u64 abs_t;
 124
 125         /*
 126          * Unfortunately can not use normal 64 bit division on 32 bit arch, but
 127          * the alternative, do_div, does not work with negative numbers so have
 128          * to special case them
 129          */
 130         if (t < 0) {
 131                 abs_t = -t;
 132                 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
 133                 ts.tv_nsec = -ts.tv_nsec;
 134                 ts.tv_sec = -abs_t;
 135         } else {
 136                 abs_t = t;
 137                 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
 138                 ts.tv_sec = abs_t;
 139         }
 140
 141         return ts;
 142 }
 143
 144 static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
 145 {
 146         s64 t = xdr_to_u64(xdr);
 147
 148         return yfs_time_to_linux(t);
 149 }
 150
 151 static void yfs_check_req(struct afs_call *call, __be32 *bp)
 152 {
 153         size_t len = (void *)bp - call->request;
 154
 155         if (len > call->request_size)
 156                 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
 157                        call->type->name, len, call->request_size);
 158         else if (len < call->request_size)
 159                 pr_warning("kAFS: %s: Request buffer underflow (%zu<%u)\n",
 160                            call->type->name, len, call->request_size);
 161 }
 162
 163 /*
 164  * Dump a bad file status record.
 165  */
 166 static void xdr_dump_bad(const __be32 *bp)
 167 {
 168         __be32 x[4];
 169         int i;
 170
 171         pr_notice("YFS XDR: Bad status record\n");
 172         for (i = 0; i < 5 * 4 * 4; i += 16) {
 173                 memcpy(x, bp, 16);
 174                 bp += 4;
 175                 pr_notice("%03x: %08x %08x %08x %08x\n",
 176                           i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
 177         }
 178
 179         memcpy(x, bp, 4);
 180         pr_notice("0x50: %08x\n", ntohl(x[0]));
 181 }
 182
 183 /*
 184  * Decode a YFSFetchStatus block
 185  */
 186 static int xdr_decode_YFSFetchStatus(struct afs_call *call,
 187                                      const __be32 **_bp,
 188                                      struct afs_file_status *status,
 189                                      struct afs_vnode *vnode,
 190                                      const afs_dataversion_t *expected_version,
 191                                      struct afs_read *read_req)
 192 {
 193         const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
 194         u32 type;
 195         u8 flags = 0;
 196
 197         status->abort_code = ntohl(xdr->abort_code);
 198         if (status->abort_code != 0) {
 199                 if (vnode && status->abort_code == VNOVNODE) {
 200                         set_bit(AFS_VNODE_DELETED, &vnode->flags);
 201                         status->nlink = 0;
 202                         __afs_break_callback(vnode);
 203                 }
 204                 return 0;
 205         }
 206
 207         type = ntohl(xdr->type);
 208         switch (type) {
 209         case AFS_FTYPE_FILE:
 210         case AFS_FTYPE_DIR:
 211         case AFS_FTYPE_SYMLINK:
 212                 if (type != status->type &&
 213                     vnode &&
 214                     !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
 215                         pr_warning("Vnode %llx:%llx:%x changed type %u to %u\n",
 216                                    vnode->fid.vid,
 217                                    vnode->fid.vnode,
 218                                    vnode->fid.unique,
 219                                    status->type, type);
 220                         goto bad;
 221                 }
 222                 status->type = type;
 223                 break;
 224         default:
 225                 goto bad;
 226         }
 227
 228 #define EXTRACT_M4(FIELD)                                       \
 229         do {                                                    \
 230                 u32 x = ntohl(xdr->FIELD);                      \
 231                 if (status->FIELD != x) {                       \
 232                         flags |= AFS_VNODE_META_CHANGED;        \
 233                         status->FIELD = x;                      \
 234                 }                                               \
 235         } while (0)
 236
 237 #define EXTRACT_M8(FIELD)                                       \
 238         do {                                                    \
 239                 u64 x = xdr_to_u64(xdr->FIELD);                 \
 240                 if (status->FIELD != x) {                       \
 241                         flags |= AFS_VNODE_META_CHANGED;        \
 242                         status->FIELD = x;                      \
 243                 }                                               \
 244         } while (0)
 245
 246 #define EXTRACT_D8(FIELD)                                       \
 247         do {                                                    \
 248                 u64 x = xdr_to_u64(xdr->FIELD);                 \
 249                 if (status->FIELD != x) {                       \
 250                         flags |= AFS_VNODE_DATA_CHANGED;        \
 251                         status->FIELD = x;                      \
 252                 }                                               \
 253         } while (0)
 254
 255         EXTRACT_M4(nlink);
 256         EXTRACT_D8(size);
 257         EXTRACT_D8(data_version);
 258         EXTRACT_M8(author);
 259         EXTRACT_M8(owner);
 260         EXTRACT_M8(group);
 261         EXTRACT_M4(mode);
 262         EXTRACT_M4(caller_access); /* call ticket dependent */
 263         EXTRACT_M4(anon_access);
 264
 265         status->mtime_client = xdr_to_time(xdr->mtime_client);
 266         status->mtime_server = xdr_to_time(xdr->mtime_server);
 267         status->lock_count   = ntohl(xdr->lock_count);
 268
 269         if (read_req) {
 270                 read_req->data_version = status->data_version;
 271                 read_req->file_size = status->size;
 272         }
 273
 274         *_bp += xdr_size(xdr);
 275
 276         if (vnode) {
 277                 if (test_bit(AFS_VNODE_UNSET, &vnode->flags))
 278                         flags |= AFS_VNODE_NOT_YET_SET;
 279                 afs_update_inode_from_status(vnode, status, expected_version,
 280                                              flags);
 281         }
 282
 283         return 0;
 284
 285 bad:
 286         xdr_dump_bad(*_bp);
 287         return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
 288 }
 289
 290 /*
 291  * Decode the file status.  We need to lock the target vnode if we're going to
 292  * update its status so that stat() sees the attributes update atomically.
 293  */
 294 static int yfs_decode_status(struct afs_call *call,
 295                              const __be32 **_bp,
 296                              struct afs_file_status *status,
 297                              struct afs_vnode *vnode,
 298                              const afs_dataversion_t *expected_version,
 299                              struct afs_read *read_req)
 300 {
 301         int ret;
 302
 303         if (!vnode)
 304                 return xdr_decode_YFSFetchStatus(call, _bp, status, vnode,
 305                                                  expected_version, read_req);
 306
 307         write_seqlock(&vnode->cb_lock);
 308         ret = xdr_decode_YFSFetchStatus(call, _bp, status, vnode,
 309                                         expected_version, read_req);
 310         write_sequnlock(&vnode->cb_lock);
 311         return ret;
 312 }
 313
 314 /*
 315  * Decode a YFSCallBack block
 316  */
 317 static void xdr_decode_YFSCallBack(struct afs_call *call,
 318                                    struct afs_vnode *vnode,
 319                                    const __be32 **_bp)
 320 {
 321         struct yfs_xdr_YFSCallBack *xdr = (void *)*_bp;
 322         struct afs_cb_interest *old, *cbi = call->cbi;
 323         u64 cb_expiry;
 324
 325         write_seqlock(&vnode->cb_lock);
 326
 327         if (!afs_cb_is_broken(call->cb_break, vnode, cbi)) {
 328                 cb_expiry = xdr_to_u64(xdr->expiration_time);
 329                 do_div(cb_expiry, 10 * 1000 * 1000);
 330                 vnode->cb_version       = ntohl(xdr->version);
 331                 vnode->cb_type          = ntohl(xdr->type);
 332                 vnode->cb_expires_at    = cb_expiry + ktime_get_real_seconds();
 333                 old = vnode->cb_interest;
 334                 if (old != call->cbi) {
 335                         vnode->cb_interest = cbi;
 336                         cbi = old;
 337                 }
 338                 set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
 339         }
 340
 341         write_sequnlock(&vnode->cb_lock);
 342         call->cbi = cbi;
 343         *_bp += xdr_size(xdr);
 344 }
 345
 346 static void xdr_decode_YFSCallBack_raw(const __be32 **_bp,
 347                                        struct afs_callback *cb)
 348 {
 349         struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
 350         u64 cb_expiry;
 351
 352         cb_expiry = xdr_to_u64(x->expiration_time);
 353         do_div(cb_expiry, 10 * 1000 * 1000);
 354         cb->version     = ntohl(x->version);
 355         cb->type        = ntohl(x->type);
 356         cb->expires_at  = cb_expiry + ktime_get_real_seconds();
 357
 358         *_bp += xdr_size(x);
 359 }
 360
 361 /*
 362  * Decode a YFSVolSync block
 363  */
 364 static void xdr_decode_YFSVolSync(const __be32 **_bp,
 365                                   struct afs_volsync *volsync)
 366 {
 367         struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
 368         u64 creation;
 369
 370         if (volsync) {
 371                 creation = xdr_to_u64(x->vol_creation_date);
 372                 do_div(creation, 10 * 1000 * 1000);
 373                 volsync->creation = creation;
 374         }
 375
 376         *_bp += xdr_size(x);
 377 }
 378
 379 /*
 380  * Encode the requested attributes into a YFSStoreStatus block
 381  */
 382 static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
 383 {
 384         struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
 385         s64 mtime = 0, owner = 0, group = 0;
 386         u32 mask = 0, mode = 0;
 387
 388         mask = 0;
 389         if (attr->ia_valid & ATTR_MTIME) {
 390                 mask |= AFS_SET_MTIME;
 391                 mtime = linux_to_yfs_time(&attr->ia_mtime);
 392         }
 393
 394         if (attr->ia_valid & ATTR_UID) {
 395                 mask |= AFS_SET_OWNER;
 396                 owner = from_kuid(&init_user_ns, attr->ia_uid);
 397         }
 398
 399         if (attr->ia_valid & ATTR_GID) {
 400                 mask |= AFS_SET_GROUP;
 401                 group = from_kgid(&init_user_ns, attr->ia_gid);
 402         }
 403
 404         if (attr->ia_valid & ATTR_MODE) {
 405                 mask |= AFS_SET_MODE;
 406                 mode = attr->ia_mode & S_IALLUGO;
 407         }
 408
 409         x->mask         = htonl(mask);
 410         x->mode         = htonl(mode);
 411         x->mtime_client = u64_to_xdr(mtime);
 412         x->owner        = u64_to_xdr(owner);
 413         x->group        = u64_to_xdr(group);
 414         return bp + xdr_size(x);
 415 }
 416
 417 /*
 418  * Decode a YFSFetchVolumeStatus block.
 419  */
 420 static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
 421                                             struct afs_volume_status *vs)
 422 {
 423         const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
 424         u32 flags;
 425
 426         vs->vid                 = xdr_to_u64(x->vid);
 427         vs->parent_id           = xdr_to_u64(x->parent_id);
 428         flags                   = ntohl(x->flags);
 429         vs->online              = flags & yfs_FVSOnline;
 430         vs->in_service          = flags & yfs_FVSInservice;
 431         vs->blessed             = flags & yfs_FVSBlessed;
 432         vs->needs_salvage       = flags & yfs_FVSNeedsSalvage;
 433         vs->type                = ntohl(x->type);
 434         vs->min_quota           = 0;
 435         vs->max_quota           = xdr_to_u64(x->max_quota);
 436         vs->blocks_in_use       = xdr_to_u64(x->blocks_in_use);
 437         vs->part_blocks_avail   = xdr_to_u64(x->part_blocks_avail);
 438         vs->part_max_blocks     = xdr_to_u64(x->part_max_blocks);
 439         vs->vol_copy_date       = xdr_to_u64(x->vol_copy_date);
 440         vs->vol_backup_date     = xdr_to_u64(x->vol_backup_date);
 441         *_bp += sizeof(*x) / sizeof(__be32);
 442 }
 443
 444 /*
 445  * deliver reply data to an FS.FetchStatus
 446  */
 447 static int yfs_deliver_fs_fetch_status_vnode(struct afs_call *call)
 448 {
 449         struct afs_vnode *vnode = call->reply[0];
 450         const __be32 *bp;
 451         int ret;
 452
 453         ret = afs_transfer_reply(call);
 454         if (ret < 0)
 455                 return ret;
 456
 457         _enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
 458
 459         /* unmarshall the reply once we've received all of it */
 460         bp = call->buffer;
 461         ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
 462                                 &call->expected_version, NULL);
 463         if (ret < 0)
 464                 return ret;
 465         xdr_decode_YFSCallBack(call, vnode, &bp);
 466         xdr_decode_YFSVolSync(&bp, call->reply[1]);
 467
 468         _leave(" = 0 [done]");
 469         return 0;
 470 }
 471
 472 /*
 473  * YFS.FetchStatus operation type
 474  */
 475 static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = {
 476         .name           = "YFS.FetchStatus(vnode)",
 477         .op             = yfs_FS_FetchStatus,
 478         .deliver        = yfs_deliver_fs_fetch_status_vnode,
 479         .destructor     = afs_flat_call_destructor,
 480 };
 481
 482 /*
 483  * Fetch the status information for a file.
 484  */
 485 int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsync,
 486                              bool new_inode)
 487 {
 488         struct afs_vnode *vnode = fc->vnode;
 489         struct afs_call *call;
 490         struct afs_net *net = afs_v2net(vnode);
 491         __be32 *bp;
 492
 493         _enter(",%x,{%llx:%llu},,",
 494                key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
 495
 496         call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus_vnode,
 497                                    sizeof(__be32) * 2 +
 498                                    sizeof(struct yfs_xdr_YFSFid),
 499                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
 500                                    sizeof(struct yfs_xdr_YFSCallBack) +
 501                                    sizeof(struct yfs_xdr_YFSVolSync));
 502         if (!call) {
 503                 fc->ac.error = -ENOMEM;
 504                 return -ENOMEM;
 505         }
 506
 507         call->key = fc->key;
 508         call->reply[0] = vnode;
 509         call->reply[1] = volsync;
 510         call->expected_version = new_inode ? 1 : vnode->status.data_version;
 511
 512         /* marshall the parameters */
 513         bp = call->request;
 514         bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
 515         bp = xdr_encode_u32(bp, 0); /* RPC flags */
 516         bp = xdr_encode_YFSFid(bp, &vnode->fid);
 517         yfs_check_req(call, bp);
 518
 519         call->cb_break = fc->cb_break;
 520         afs_use_fs_server(call, fc->cbi);
 521         trace_afs_make_fs_call(call, &vnode->fid);
 522         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
 523 }
 524
 525 /*
 526  * Deliver reply data to an YFS.FetchData64.
 527  */
 528 static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 529 {
 530         struct afs_vnode *vnode = call->reply[0];
 531         struct afs_read *req = call->reply[2];
 532         const __be32 *bp;
 533         unsigned int size;
 534         int ret;
 535
 536         _enter("{%u,%zu/%llu}",
 537                call->unmarshall, iov_iter_count(&call->iter), req->actual_len);
 538
 539         switch (call->unmarshall) {
 540         case 0:
 541                 req->actual_len = 0;
 542                 req->index = 0;
 543                 req->offset = req->pos & (PAGE_SIZE - 1);
 544                 afs_extract_to_tmp64(call);
 545                 call->unmarshall++;
 546
 547                 /* extract the returned data length */
 548         case 1:
 549                 _debug("extract data length");
 550                 ret = afs_extract_data(call, true);
 551                 if (ret < 0)
 552                         return ret;
 553
 554                 req->actual_len = be64_to_cpu(call->tmp64);
 555                 _debug("DATA length: %llu", req->actual_len);
 556                 req->remain = min(req->len, req->actual_len);
 557                 if (req->remain == 0)
 558                         goto no_more_data;
 559
 560                 call->unmarshall++;
 561
 562         begin_page:
 563                 ASSERTCMP(req->index, <, req->nr_pages);
 564                 if (req->remain > PAGE_SIZE - req->offset)
 565                         size = PAGE_SIZE - req->offset;
 566                 else
 567                         size = req->remain;
 568                 call->bvec[0].bv_len = size;
 569                 call->bvec[0].bv_offset = req->offset;
 570                 call->bvec[0].bv_page = req->pages[req->index];
 571                 iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
 572                 ASSERTCMP(size, <=, PAGE_SIZE);
 573
 574                 /* extract the returned data */
 575         case 2:
 576                 _debug("extract data %zu/%llu",
 577                        iov_iter_count(&call->iter), req->remain);
 578
 579                 ret = afs_extract_data(call, true);
 580                 if (ret < 0)
 581                         return ret;
 582                 req->remain -= call->bvec[0].bv_len;
 583                 req->offset += call->bvec[0].bv_len;
 584                 ASSERTCMP(req->offset, <=, PAGE_SIZE);
 585                 if (req->offset == PAGE_SIZE) {
 586                         req->offset = 0;
 587                         if (req->page_done)
 588                                 req->page_done(call, req);
 589                         req->index++;
 590                         if (req->remain > 0)
 591                                 goto begin_page;
 592                 }
 593
 594                 ASSERTCMP(req->remain, ==, 0);
 595                 if (req->actual_len <= req->len)
 596                         goto no_more_data;
 597
 598                 /* Discard any excess data the server gave us */
 599                 iov_iter_discard(&call->iter, READ, req->actual_len - req->len);
 600                 call->unmarshall = 3;
 601         case 3:
 602                 _debug("extract discard %zu/%llu",
 603                        iov_iter_count(&call->iter), req->actual_len - req->len);
 604
 605                 ret = afs_extract_data(call, true);
 606                 if (ret < 0)
 607                         return ret;
 608
 609         no_more_data:
 610                 call->unmarshall = 4;
 611                 afs_extract_to_buf(call,
 612                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
 613                                    sizeof(struct yfs_xdr_YFSCallBack) +
 614                                    sizeof(struct yfs_xdr_YFSVolSync));
 615
 616                 /* extract the metadata */
 617         case 4:
 618                 ret = afs_extract_data(call, false);
 619                 if (ret < 0)
 620                         return ret;
 621
 622                 bp = call->buffer;
 623                 ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
 624                                         &vnode->status.data_version, req);
 625                 if (ret < 0)
 626                         return ret;
 627                 xdr_decode_YFSCallBack(call, vnode, &bp);
 628                 xdr_decode_YFSVolSync(&bp, call->reply[1]);
 629
 630                 call->unmarshall++;
 631
 632         case 5:
 633                 break;
 634         }
 635
 636         for (; req->index < req->nr_pages; req->index++) {
 637                 if (req->offset < PAGE_SIZE)
 638                         zero_user_segment(req->pages[req->index],
 639                                           req->offset, PAGE_SIZE);
 640                 if (req->page_done)
 641                         req->page_done(call, req);
 642                 req->offset = 0;
 643         }
 644
 645         _leave(" = 0 [done]");
 646         return 0;
 647 }
 648
 649 static void yfs_fetch_data_destructor(struct afs_call *call)
 650 {
 651         struct afs_read *req = call->reply[2];
 652
 653         afs_put_read(req);
 654         afs_flat_call_destructor(call);
 655 }
 656
 657 /*
 658  * YFS.FetchData64 operation type
 659  */
 660 static const struct afs_call_type yfs_RXYFSFetchData64 = {
 661         .name           = "YFS.FetchData64",
 662         .op             = yfs_FS_FetchData64,
 663         .deliver        = yfs_deliver_fs_fetch_data64,
 664         .destructor     = yfs_fetch_data_destructor,
 665 };
 666
 667 /*
 668  * Fetch data from a file.
 669  */
 670 int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
 671 {
 672         struct afs_vnode *vnode = fc->vnode;
 673         struct afs_call *call;
 674         struct afs_net *net = afs_v2net(vnode);
 675         __be32 *bp;
 676
 677         _enter(",%x,{%llx:%llu},%llx,%llx",
 678                key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode,
 679                req->pos, req->len);
 680
 681         call = afs_alloc_flat_call(net, &yfs_RXYFSFetchData64,
 682                                    sizeof(__be32) * 2 +
 683                                    sizeof(struct yfs_xdr_YFSFid) +
 684                                    sizeof(struct yfs_xdr_u64) * 2,
 685                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
 686                                    sizeof(struct yfs_xdr_YFSCallBack) +
 687                                    sizeof(struct yfs_xdr_YFSVolSync));
 688         if (!call)
 689                 return -ENOMEM;
 690
 691         call->key = fc->key;
 692         call->reply[0] = vnode;
 693         call->reply[1] = NULL; /* volsync */
 694         call->reply[2] = req;
 695         call->expected_version = vnode->status.data_version;
 696         call->want_reply_time = true;
 697
 698         /* marshall the parameters */
 699         bp = call->request;
 700         bp = xdr_encode_u32(bp, YFSFETCHDATA64);
 701         bp = xdr_encode_u32(bp, 0); /* RPC flags */
 702         bp = xdr_encode_YFSFid(bp, &vnode->fid);
 703         bp = xdr_encode_u64(bp, req->pos);
 704         bp = xdr_encode_u64(bp, req->len);
 705         yfs_check_req(call, bp);
 706
 707         refcount_inc(&req->usage);
 708         call->cb_break = fc->cb_break;
 709         afs_use_fs_server(call, fc->cbi);
 710         trace_afs_make_fs_call(call, &vnode->fid);
 711         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
 712 }
 713
 714 /*
 715  * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
 716  */
 717 static int yfs_deliver_fs_create_vnode(struct afs_call *call)
 718 {
 719         struct afs_vnode *vnode = call->reply[0];
 720         const __be32 *bp;
 721         int ret;
 722
 723         _enter("{%u}", call->unmarshall);
 724
 725         ret = afs_transfer_reply(call);
 726         if (ret < 0)
 727                 return ret;
 728
 729         /* unmarshall the reply once we've received all of it */
 730         bp = call->buffer;
 731         xdr_decode_YFSFid(&bp, call->reply[1]);
 732         ret = yfs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL);
 733         if (ret < 0)
 734                 return ret;
 735         ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
 736                                 &call->expected_version, NULL);
 737         if (ret < 0)
 738                 return ret;
 739         xdr_decode_YFSCallBack_raw(&bp, call->reply[3]);
 740         xdr_decode_YFSVolSync(&bp, NULL);
 741
 742         _leave(" = 0 [done]");
 743         return 0;
 744 }
 745
 746 /*
 747  * FS.CreateFile and FS.MakeDir operation type
 748  */
 749 static const struct afs_call_type afs_RXFSCreateFile = {
 750         .name           = "YFS.CreateFile",
 751         .op             = yfs_FS_CreateFile,
 752         .deliver        = yfs_deliver_fs_create_vnode,
 753         .destructor     = afs_flat_call_destructor,
 754 };
 755
 756 /*
 757  * Create a file.
 758  */
 759 int yfs_fs_create_file(struct afs_fs_cursor *fc,
 760                        const char *name,
 761                        umode_t mode,
 762                        u64 current_data_version,
 763                        struct afs_fid *newfid,
 764                        struct afs_file_status *newstatus,
 765                        struct afs_callback *newcb)
 766 {
 767         struct afs_vnode *vnode = fc->vnode;
 768         struct afs_call *call;
 769         struct afs_net *net = afs_v2net(vnode);
 770         size_t namesz, reqsz, rplsz;
 771         __be32 *bp;
 772
 773         _enter("");
 774
 775         namesz = strlen(name);
 776         reqsz = (sizeof(__be32) +
 777                  sizeof(__be32) +
 778                  sizeof(struct yfs_xdr_YFSFid) +
 779                  xdr_strlen(namesz) +
 780                  sizeof(struct yfs_xdr_YFSStoreStatus) +
 781                  sizeof(__be32));
 782         rplsz = (sizeof(struct yfs_xdr_YFSFid) +
 783                  sizeof(struct yfs_xdr_YFSFetchStatus) +
 784                  sizeof(struct yfs_xdr_YFSFetchStatus) +
 785                  sizeof(struct yfs_xdr_YFSCallBack) +
 786                  sizeof(struct yfs_xdr_YFSVolSync));
 787
 788         call = afs_alloc_flat_call(net, &afs_RXFSCreateFile, reqsz, rplsz);
 789         if (!call)
 790                 return -ENOMEM;
 791
 792         call->key = fc->key;
 793         call->reply[0] = vnode;
 794         call->reply[1] = newfid;
 795         call->reply[2] = newstatus;
 796         call->reply[3] = newcb;
 797         call->expected_version = current_data_version + 1;
 798
 799         /* marshall the parameters */
 800         bp = call->request;
 801         bp = xdr_encode_u32(bp, YFSCREATEFILE);
 802         bp = xdr_encode_u32(bp, 0); /* RPC flags */
 803         bp = xdr_encode_YFSFid(bp, &vnode->fid);
 804         bp = xdr_encode_string(bp, name, namesz);
 805         bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
 806         bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
 807         yfs_check_req(call, bp);
 808
 809         afs_use_fs_server(call, fc->cbi);
 810         trace_afs_make_fs_call(call, &vnode->fid);
 811         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
 812 }
 813
 814 static const struct afs_call_type yfs_RXFSMakeDir = {
 815         .name           = "YFS.MakeDir",
 816         .op             = yfs_FS_MakeDir,
 817         .deliver        = yfs_deliver_fs_create_vnode,
 818         .destructor     = afs_flat_call_destructor,
 819 };
 820
 821 /*
 822  * Make a directory.
 823  */
 824 int yfs_fs_make_dir(struct afs_fs_cursor *fc,
 825                     const char *name,
 826                     umode_t mode,
 827                     u64 current_data_version,
 828                     struct afs_fid *newfid,
 829                     struct afs_file_status *newstatus,
 830                     struct afs_callback *newcb)
 831 {
 832         struct afs_vnode *vnode = fc->vnode;
 833         struct afs_call *call;
 834         struct afs_net *net = afs_v2net(vnode);
 835         size_t namesz, reqsz, rplsz;
 836         __be32 *bp;
 837
 838         _enter("");
 839
 840         namesz = strlen(name);
 841         reqsz = (sizeof(__be32) +
 842                  sizeof(struct yfs_xdr_RPCFlags) +
 843                  sizeof(struct yfs_xdr_YFSFid) +
 844                  xdr_strlen(namesz) +
 845                  sizeof(struct yfs_xdr_YFSStoreStatus));
 846         rplsz = (sizeof(struct yfs_xdr_YFSFid) +
 847                  sizeof(struct yfs_xdr_YFSFetchStatus) +
 848                  sizeof(struct yfs_xdr_YFSFetchStatus) +
 849                  sizeof(struct yfs_xdr_YFSCallBack) +
 850                  sizeof(struct yfs_xdr_YFSVolSync));
 851
 852         call = afs_alloc_flat_call(net, &yfs_RXFSMakeDir, reqsz, rplsz);
 853         if (!call)
 854                 return -ENOMEM;
 855
 856         call->key = fc->key;
 857         call->reply[0] = vnode;
 858         call->reply[1] = newfid;
 859         call->reply[2] = newstatus;
 860         call->reply[3] = newcb;
 861         call->expected_version = current_data_version + 1;
 862
 863         /* marshall the parameters */
 864         bp = call->request;
 865         bp = xdr_encode_u32(bp, YFSMAKEDIR);
 866         bp = xdr_encode_u32(bp, 0); /* RPC flags */
 867         bp = xdr_encode_YFSFid(bp, &vnode->fid);
 868         bp = xdr_encode_string(bp, name, namesz);
 869         bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
 870         yfs_check_req(call, bp);
 871
 872         afs_use_fs_server(call, fc->cbi);
 873         trace_afs_make_fs_call(call, &vnode->fid);
 874         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
 875 }
 876
 877 /*
 878  * Deliver reply data to a YFS.RemoveFile2 operation.
 879  */
 880 static int yfs_deliver_fs_remove_file2(struct afs_call *call)
 881 {
 882         struct afs_vnode *dvnode = call->reply[0];
 883         struct afs_vnode *vnode = call->reply[1];
 884         struct afs_fid fid;
 885         const __be32 *bp;
 886         int ret;
 887
 888         _enter("{%u}", call->unmarshall);
 889
 890         ret = afs_transfer_reply(call);
 891         if (ret < 0)
 892                 return ret;
 893
 894         /* unmarshall the reply once we've received all of it */
 895         bp = call->buffer;
 896         ret = yfs_decode_status(call, &bp, &dvnode->status, dvnode,
 897                                 &call->expected_version, NULL);
 898         if (ret < 0)
 899                 return ret;
 900
 901         xdr_decode_YFSFid(&bp, &fid);
 902         ret = yfs_decode_status(call, &bp, &vnode->status, vnode, NULL, NULL);
 903         if (ret < 0)
 904                 return ret;
 905         /* Was deleted if vnode->status.abort_code == VNOVNODE. */
 906
 907         xdr_decode_YFSVolSync(&bp, NULL);
 908         return 0;
 909 }
 910
 911 /*
 912  * YFS.RemoveFile2 operation type.
 913  */
 914 static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
 915         .name           = "YFS.RemoveFile2",
 916         .op             = yfs_FS_RemoveFile2,
 917         .deliver        = yfs_deliver_fs_remove_file2,
 918         .destructor     = afs_flat_call_destructor,
 919 };
 920
 921 /*
 922  * Remove a file and retrieve new file status.
 923  */
 924 int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 925                         const char *name, u64 current_data_version)
 926 {
 927         struct afs_vnode *dvnode = fc->vnode;
 928         struct afs_call *call;
 929         struct afs_net *net = afs_v2net(dvnode);
 930         size_t namesz;
 931         __be32 *bp;
 932
 933         _enter("");
 934
 935         namesz = strlen(name);
 936
 937         call = afs_alloc_flat_call(net, &yfs_RXYFSRemoveFile2,
 938                                    sizeof(__be32) +
 939                                    sizeof(struct yfs_xdr_RPCFlags) +
 940                                    sizeof(struct yfs_xdr_YFSFid) +
 941                                    xdr_strlen(namesz),
 942                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
 943                                    sizeof(struct yfs_xdr_YFSFid) +
 944                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
 945                                    sizeof(struct yfs_xdr_YFSVolSync));
 946         if (!call)
 947                 return -ENOMEM;
 948
 949         call->key = fc->key;
 950         call->reply[0] = dvnode;
 951         call->reply[1] = vnode;
 952         call->expected_version = current_data_version + 1;
 953
 954         /* marshall the parameters */
 955         bp = call->request;
 956         bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
 957         bp = xdr_encode_u32(bp, 0); /* RPC flags */
 958         bp = xdr_encode_YFSFid(bp, &dvnode->fid);
 959         bp = xdr_encode_string(bp, name, namesz);
 960         yfs_check_req(call, bp);
 961
 962         afs_use_fs_server(call, fc->cbi);
 963         trace_afs_make_fs_call(call, &dvnode->fid);
 964         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
 965 }
 966
 967 /*
 968  * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
 969  */
 970 static int yfs_deliver_fs_remove(struct afs_call *call)
 971 {
 972         struct afs_vnode *dvnode = call->reply[0];
 973         const __be32 *bp;
 974         int ret;
 975
 976         _enter("{%u}", call->unmarshall);
 977
 978         ret = afs_transfer_reply(call);
 979         if (ret < 0)
 980                 return ret;
 981
 982         /* unmarshall the reply once we've received all of it */
 983         bp = call->buffer;
 984         ret = yfs_decode_status(call, &bp, &dvnode->status, dvnode,
 985                                 &call->expected_version, NULL);
 986         if (ret < 0)
 987                 return ret;
 988
 989         xdr_decode_YFSVolSync(&bp, NULL);
 990         return 0;
 991 }
 992
 993 /*
 994  * FS.RemoveDir and FS.RemoveFile operation types.
 995  */
 996 static const struct afs_call_type yfs_RXYFSRemoveFile = {
 997         .name           = "YFS.RemoveFile",
 998         .op             = yfs_FS_RemoveFile,
 999         .deliver        = yfs_deliver_fs_remove,
1000         .destructor     = afs_flat_call_destructor,
1001 };
1002
1003 static const struct afs_call_type yfs_RXYFSRemoveDir = {
1004         .name           = "YFS.RemoveDir",
1005         .op             = yfs_FS_RemoveDir,
1006         .deliver        = yfs_deliver_fs_remove,
1007         .destructor     = afs_flat_call_destructor,
1008 };
1009
1010 /*
1011  * remove a file or directory
1012  */
1013 int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
1014                   const char *name, bool isdir, u64 current_data_version)
1015 {
1016         struct afs_vnode *dvnode = fc->vnode;
1017         struct afs_call *call;
1018         struct afs_net *net = afs_v2net(dvnode);
1019         size_t namesz;
1020         __be32 *bp;
1021
1022         _enter("");
1023
1024         namesz = strlen(name);
1025         call = afs_alloc_flat_call(
1026                 net, isdir ? &yfs_RXYFSRemoveDir : &yfs_RXYFSRemoveFile,
1027                 sizeof(__be32) +
1028                 sizeof(struct yfs_xdr_RPCFlags) +
1029                 sizeof(struct yfs_xdr_YFSFid) +
1030                 xdr_strlen(namesz),
1031                 sizeof(struct yfs_xdr_YFSFetchStatus) +
1032                 sizeof(struct yfs_xdr_YFSVolSync));
1033         if (!call)
1034                 return -ENOMEM;
1035
1036         call->key = fc->key;
1037         call->reply[0] = dvnode;
1038         call->reply[1] = vnode;
1039         call->expected_version = current_data_version + 1;
1040
1041         /* marshall the parameters */
1042         bp = call->request;
1043         bp = xdr_encode_u32(bp, isdir ? YFSREMOVEDIR : YFSREMOVEFILE);
1044         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1045         bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1046         bp = xdr_encode_string(bp, name, namesz);
1047         yfs_check_req(call, bp);
1048
1049         afs_use_fs_server(call, fc->cbi);
1050         trace_afs_make_fs_call(call, &dvnode->fid);
1051         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1052 }
1053
1054 /*
1055  * Deliver reply data to a YFS.Link operation.
1056  */
1057 static int yfs_deliver_fs_link(struct afs_call *call)
1058 {
1059         struct afs_vnode *dvnode = call->reply[0], *vnode = call->reply[1];
1060         const __be32 *bp;
1061         int ret;
1062
1063         _enter("{%u}", call->unmarshall);
1064
1065         ret = afs_transfer_reply(call);
1066         if (ret < 0)
1067                 return ret;
1068
1069         /* unmarshall the reply once we've received all of it */
1070         bp = call->buffer;
1071         ret = yfs_decode_status(call, &bp, &vnode->status, vnode, NULL, NULL);
1072         if (ret < 0)
1073                 return ret;
1074         ret = yfs_decode_status(call, &bp, &dvnode->status, dvnode,
1075                                 &call->expected_version, NULL);
1076         if (ret < 0)
1077                 return ret;
1078         xdr_decode_YFSVolSync(&bp, NULL);
1079         _leave(" = 0 [done]");
1080         return 0;
1081 }
1082
1083 /*
1084  * YFS.Link operation type.
1085  */
1086 static const struct afs_call_type yfs_RXYFSLink = {
1087         .name           = "YFS.Link",
1088         .op             = yfs_FS_Link,
1089         .deliver        = yfs_deliver_fs_link,
1090         .destructor     = afs_flat_call_destructor,
1091 };
1092
1093 /*
1094  * Make a hard link.
1095  */
1096 int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
1097                 const char *name, u64 current_data_version)
1098 {
1099         struct afs_vnode *dvnode = fc->vnode;
1100         struct afs_call *call;
1101         struct afs_net *net = afs_v2net(vnode);
1102         size_t namesz;
1103         __be32 *bp;
1104
1105         _enter("");
1106
1107         namesz = strlen(name);
1108         call = afs_alloc_flat_call(net, &yfs_RXYFSLink,
1109                                    sizeof(__be32) +
1110                                    sizeof(struct yfs_xdr_RPCFlags) +
1111                                    sizeof(struct yfs_xdr_YFSFid) +
1112                                    xdr_strlen(namesz) +
1113                                    sizeof(struct yfs_xdr_YFSFid),
1114                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1115                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1116                                    sizeof(struct yfs_xdr_YFSVolSync));
1117         if (!call)
1118                 return -ENOMEM;
1119
1120         call->key = fc->key;
1121         call->reply[0] = dvnode;
1122         call->reply[1] = vnode;
1123         call->expected_version = current_data_version + 1;
1124
1125         /* marshall the parameters */
1126         bp = call->request;
1127         bp = xdr_encode_u32(bp, YFSLINK);
1128         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1129         bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1130         bp = xdr_encode_string(bp, name, namesz);
1131         bp = xdr_encode_YFSFid(bp, &vnode->fid);
1132         yfs_check_req(call, bp);
1133
1134         afs_use_fs_server(call, fc->cbi);
1135         trace_afs_make_fs_call(call, &vnode->fid);
1136         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1137 }
1138
1139 /*
1140  * Deliver reply data to a YFS.Symlink operation.
1141  */
1142 static int yfs_deliver_fs_symlink(struct afs_call *call)
1143 {
1144         struct afs_vnode *vnode = call->reply[0];
1145         const __be32 *bp;
1146         int ret;
1147
1148         _enter("{%u}", call->unmarshall);
1149
1150         ret = afs_transfer_reply(call);
1151         if (ret < 0)
1152                 return ret;
1153
1154         /* unmarshall the reply once we've received all of it */
1155         bp = call->buffer;
1156         xdr_decode_YFSFid(&bp, call->reply[1]);
1157         ret = yfs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL);
1158         if (ret < 0)
1159                 return ret;
1160         ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
1161                                 &call->expected_version, NULL);
1162         if (ret < 0)
1163                 return ret;
1164         xdr_decode_YFSVolSync(&bp, NULL);
1165
1166         _leave(" = 0 [done]");
1167         return 0;
1168 }
1169
1170 /*
1171  * YFS.Symlink operation type
1172  */
1173 static const struct afs_call_type yfs_RXYFSSymlink = {
1174         .name           = "YFS.Symlink",
1175         .op             = yfs_FS_Symlink,
1176         .deliver        = yfs_deliver_fs_symlink,
1177         .destructor     = afs_flat_call_destructor,
1178 };
1179
1180 /*
1181  * Create a symbolic link.
1182  */
1183 int yfs_fs_symlink(struct afs_fs_cursor *fc,
1184                    const char *name,
1185                    const char *contents,
1186                    u64 current_data_version,
1187                    struct afs_fid *newfid,
1188                    struct afs_file_status *newstatus)
1189 {
1190         struct afs_vnode *dvnode = fc->vnode;
1191         struct afs_call *call;
1192         struct afs_net *net = afs_v2net(dvnode);
1193         size_t namesz, contents_sz;
1194         __be32 *bp;
1195
1196         _enter("");
1197
1198         namesz = strlen(name);
1199         contents_sz = strlen(contents);
1200         call = afs_alloc_flat_call(net, &yfs_RXYFSSymlink,
1201                                    sizeof(__be32) +
1202                                    sizeof(struct yfs_xdr_RPCFlags) +
1203                                    sizeof(struct yfs_xdr_YFSFid) +
1204                                    xdr_strlen(namesz) +
1205                                    xdr_strlen(contents_sz) +
1206                                    sizeof(struct yfs_xdr_YFSStoreStatus),
1207                                    sizeof(struct yfs_xdr_YFSFid) +
1208                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1209                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1210                                    sizeof(struct yfs_xdr_YFSVolSync));
1211         if (!call)
1212                 return -ENOMEM;
1213
1214         call->key = fc->key;
1215         call->reply[0] = dvnode;
1216         call->reply[1] = newfid;
1217         call->reply[2] = newstatus;
1218         call->expected_version = current_data_version + 1;
1219
1220         /* marshall the parameters */
1221         bp = call->request;
1222         bp = xdr_encode_u32(bp, YFSSYMLINK);
1223         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1224         bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1225         bp = xdr_encode_string(bp, name, namesz);
1226         bp = xdr_encode_string(bp, contents, contents_sz);
1227         bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO);
1228         yfs_check_req(call, bp);
1229
1230         afs_use_fs_server(call, fc->cbi);
1231         trace_afs_make_fs_call(call, &dvnode->fid);
1232         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1233 }
1234
1235 /*
1236  * Deliver reply data to a YFS.Rename operation.
1237  */
1238 static int yfs_deliver_fs_rename(struct afs_call *call)
1239 {
1240         struct afs_vnode *orig_dvnode = call->reply[0];
1241         struct afs_vnode *new_dvnode = call->reply[1];
1242         const __be32 *bp;
1243         int ret;
1244
1245         _enter("{%u}", call->unmarshall);
1246
1247         ret = afs_transfer_reply(call);
1248         if (ret < 0)
1249                 return ret;
1250
1251         /* unmarshall the reply once we've received all of it */
1252         bp = call->buffer;
1253         ret = yfs_decode_status(call, &bp, &orig_dvnode->status, orig_dvnode,
1254                                 &call->expected_version, NULL);
1255         if (ret < 0)
1256                 return ret;
1257         if (new_dvnode != orig_dvnode) {
1258                 ret = yfs_decode_status(call, &bp, &new_dvnode->status, new_dvnode,
1259                                         &call->expected_version_2, NULL);
1260                 if (ret < 0)
1261                         return ret;
1262         }
1263
1264         xdr_decode_YFSVolSync(&bp, NULL);
1265         _leave(" = 0 [done]");
1266         return 0;
1267 }
1268
1269 /*
1270  * YFS.Rename operation type
1271  */
1272 static const struct afs_call_type yfs_RXYFSRename = {
1273         .name           = "FS.Rename",
1274         .op             = yfs_FS_Rename,
1275         .deliver        = yfs_deliver_fs_rename,
1276         .destructor     = afs_flat_call_destructor,
1277 };
1278
1279 /*
1280  * Rename a file or directory.
1281  */
1282 int yfs_fs_rename(struct afs_fs_cursor *fc,
1283                   const char *orig_name,
1284                   struct afs_vnode *new_dvnode,
1285                   const char *new_name,
1286                   u64 current_orig_data_version,
1287                   u64 current_new_data_version)
1288 {
1289         struct afs_vnode *orig_dvnode = fc->vnode;
1290         struct afs_call *call;
1291         struct afs_net *net = afs_v2net(orig_dvnode);
1292         size_t o_namesz, n_namesz;
1293         __be32 *bp;
1294
1295         _enter("");
1296
1297         o_namesz = strlen(orig_name);
1298         n_namesz = strlen(new_name);
1299         call = afs_alloc_flat_call(net, &yfs_RXYFSRename,
1300                                    sizeof(__be32) +
1301                                    sizeof(struct yfs_xdr_RPCFlags) +
1302                                    sizeof(struct yfs_xdr_YFSFid) +
1303                                    xdr_strlen(o_namesz) +
1304                                    sizeof(struct yfs_xdr_YFSFid) +
1305                                    xdr_strlen(n_namesz),
1306                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1307                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1308                                    sizeof(struct yfs_xdr_YFSVolSync));
1309         if (!call)
1310                 return -ENOMEM;
1311
1312         call->key = fc->key;
1313         call->reply[0] = orig_dvnode;
1314         call->reply[1] = new_dvnode;
1315         call->expected_version = current_orig_data_version + 1;
1316         call->expected_version_2 = current_new_data_version + 1;
1317
1318         /* marshall the parameters */
1319         bp = call->request;
1320         bp = xdr_encode_u32(bp, YFSRENAME);
1321         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1322         bp = xdr_encode_YFSFid(bp, &orig_dvnode->fid);
1323         bp = xdr_encode_string(bp, orig_name, o_namesz);
1324         bp = xdr_encode_YFSFid(bp, &new_dvnode->fid);
1325         bp = xdr_encode_string(bp, new_name, n_namesz);
1326         yfs_check_req(call, bp);
1327
1328         afs_use_fs_server(call, fc->cbi);
1329         trace_afs_make_fs_call(call, &orig_dvnode->fid);
1330         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1331 }
1332
1333 /*
1334  * Deliver reply data to a YFS.StoreData64 operation.
1335  */
1336 static int yfs_deliver_fs_store_data(struct afs_call *call)
1337 {
1338         struct afs_vnode *vnode = call->reply[0];
1339         const __be32 *bp;
1340         int ret;
1341
1342         _enter("");
1343
1344         ret = afs_transfer_reply(call);
1345         if (ret < 0)
1346                 return ret;
1347
1348         /* unmarshall the reply once we've received all of it */
1349         bp = call->buffer;
1350         ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
1351                                 &call->expected_version, NULL);
1352         if (ret < 0)
1353                 return ret;
1354         xdr_decode_YFSVolSync(&bp, NULL);
1355
1356         afs_pages_written_back(vnode, call);
1357
1358         _leave(" = 0 [done]");
1359         return 0;
1360 }
1361
1362 /*
1363  * YFS.StoreData64 operation type.
1364  */
1365 static const struct afs_call_type yfs_RXYFSStoreData64 = {
1366         .name           = "YFS.StoreData64",
1367         .op             = yfs_FS_StoreData64,
1368         .deliver        = yfs_deliver_fs_store_data,
1369         .destructor     = afs_flat_call_destructor,
1370 };
1371
1372 /*
1373  * Store a set of pages to a large file.
1374  */
1375 int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1376                       pgoff_t first, pgoff_t last,
1377                       unsigned offset, unsigned to)
1378 {
1379         struct afs_vnode *vnode = fc->vnode;
1380         struct afs_call *call;
1381         struct afs_net *net = afs_v2net(vnode);
1382         loff_t size, pos, i_size;
1383         __be32 *bp;
1384
1385         _enter(",%x,{%llx:%llu},,",
1386                key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1387
1388         size = (loff_t)to - (loff_t)offset;
1389         if (first != last)
1390                 size += (loff_t)(last - first) << PAGE_SHIFT;
1391         pos = (loff_t)first << PAGE_SHIFT;
1392         pos += offset;
1393
1394         i_size = i_size_read(&vnode->vfs_inode);
1395         if (pos + size > i_size)
1396                 i_size = size + pos;
1397
1398         _debug("size %llx, at %llx, i_size %llx",
1399                (unsigned long long)size, (unsigned long long)pos,
1400                (unsigned long long)i_size);
1401
1402         call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64,
1403                                    sizeof(__be32) +
1404                                    sizeof(__be32) +
1405                                    sizeof(struct yfs_xdr_YFSFid) +
1406                                    sizeof(struct yfs_xdr_YFSStoreStatus) +
1407                                    sizeof(struct yfs_xdr_u64) * 3,
1408                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1409                                    sizeof(struct yfs_xdr_YFSVolSync));
1410         if (!call)
1411                 return -ENOMEM;
1412
1413         call->key = fc->key;
1414         call->mapping = mapping;
1415         call->reply[0] = vnode;
1416         call->first = first;
1417         call->last = last;
1418         call->first_offset = offset;
1419         call->last_to = to;
1420         call->send_pages = true;
1421         call->expected_version = vnode->status.data_version + 1;
1422
1423         /* marshall the parameters */
1424         bp = call->request;
1425         bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1426         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1427         bp = xdr_encode_YFSFid(bp, &vnode->fid);
1428         bp = xdr_encode_YFSStoreStatus_mtime(bp, &vnode->vfs_inode.i_mtime);
1429         bp = xdr_encode_u64(bp, pos);
1430         bp = xdr_encode_u64(bp, size);
1431         bp = xdr_encode_u64(bp, i_size);
1432         yfs_check_req(call, bp);
1433
1434         afs_use_fs_server(call, fc->cbi);
1435         trace_afs_make_fs_call(call, &vnode->fid);
1436         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1437 }
1438
1439 /*
1440  * deliver reply data to an FS.StoreStatus
1441  */
1442 static int yfs_deliver_fs_store_status(struct afs_call *call)
1443 {
1444         struct afs_vnode *vnode = call->reply[0];
1445         const __be32 *bp;
1446         int ret;
1447
1448         _enter("");
1449
1450         ret = afs_transfer_reply(call);
1451         if (ret < 0)
1452                 return ret;
1453
1454         /* unmarshall the reply once we've received all of it */
1455         bp = call->buffer;
1456         ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
1457                                 &call->expected_version, NULL);
1458         if (ret < 0)
1459                 return ret;
1460         xdr_decode_YFSVolSync(&bp, NULL);
1461
1462         _leave(" = 0 [done]");
1463         return 0;
1464 }
1465
1466 /*
1467  * YFS.StoreStatus operation type
1468  */
1469 static const struct afs_call_type yfs_RXYFSStoreStatus = {
1470         .name           = "YFS.StoreStatus",
1471         .op             = yfs_FS_StoreStatus,
1472         .deliver        = yfs_deliver_fs_store_status,
1473         .destructor     = afs_flat_call_destructor,
1474 };
1475
1476 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1477         .name           = "YFS.StoreData64",
1478         .op             = yfs_FS_StoreData64,
1479         .deliver        = yfs_deliver_fs_store_status,
1480         .destructor     = afs_flat_call_destructor,
1481 };
1482
1483 /*
1484  * Set the attributes on a file, using YFS.StoreData64 rather than
1485  * YFS.StoreStatus so as to alter the file size also.
1486  */
1487 static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
1488 {
1489         struct afs_vnode *vnode = fc->vnode;
1490         struct afs_call *call;
1491         struct afs_net *net = afs_v2net(vnode);
1492         __be32 *bp;
1493
1494         _enter(",%x,{%llx:%llu},,",
1495                key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1496
1497         call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64_as_Status,
1498                                    sizeof(__be32) * 2 +
1499                                    sizeof(struct yfs_xdr_YFSFid) +
1500                                    sizeof(struct yfs_xdr_YFSStoreStatus) +
1501                                    sizeof(struct yfs_xdr_u64) * 3,
1502                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1503                                    sizeof(struct yfs_xdr_YFSVolSync));
1504         if (!call)
1505                 return -ENOMEM;
1506
1507         call->key = fc->key;
1508         call->reply[0] = vnode;
1509         call->expected_version = vnode->status.data_version + 1;
1510
1511         /* marshall the parameters */
1512         bp = call->request;
1513         bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1514         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1515         bp = xdr_encode_YFSFid(bp, &vnode->fid);
1516         bp = xdr_encode_YFS_StoreStatus(bp, attr);
1517         bp = xdr_encode_u64(bp, 0);             /* position of start of write */
1518         bp = xdr_encode_u64(bp, 0);             /* size of write */
1519         bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1520         yfs_check_req(call, bp);
1521
1522         afs_use_fs_server(call, fc->cbi);
1523         trace_afs_make_fs_call(call, &vnode->fid);
1524         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1525 }
1526
1527 /*
1528  * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1529  * file size, and YFS.StoreStatus otherwise.
1530  */
1531 int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
1532 {
1533         struct afs_vnode *vnode = fc->vnode;
1534         struct afs_call *call;
1535         struct afs_net *net = afs_v2net(vnode);
1536         __be32 *bp;
1537
1538         if (attr->ia_valid & ATTR_SIZE)
1539                 return yfs_fs_setattr_size(fc, attr);
1540
1541         _enter(",%x,{%llx:%llu},,",
1542                key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1543
1544         call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
1545                                    sizeof(__be32) * 2 +
1546                                    sizeof(struct yfs_xdr_YFSFid) +
1547                                    sizeof(struct yfs_xdr_YFSStoreStatus),
1548                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1549                                    sizeof(struct yfs_xdr_YFSVolSync));
1550         if (!call)
1551                 return -ENOMEM;
1552
1553         call->key = fc->key;
1554         call->reply[0] = vnode;
1555         call->expected_version = vnode->status.data_version;
1556
1557         /* marshall the parameters */
1558         bp = call->request;
1559         bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1560         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1561         bp = xdr_encode_YFSFid(bp, &vnode->fid);
1562         bp = xdr_encode_YFS_StoreStatus(bp, attr);
1563         yfs_check_req(call, bp);
1564
1565         afs_use_fs_server(call, fc->cbi);
1566         trace_afs_make_fs_call(call, &vnode->fid);
1567         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1568 }
1569
1570 /*
1571  * Deliver reply data to a YFS.GetVolumeStatus operation.
1572  */
1573 static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1574 {
1575         const __be32 *bp;
1576         char *p;
1577         u32 size;
1578         int ret;
1579
1580         _enter("{%u}", call->unmarshall);
1581
1582         switch (call->unmarshall) {
1583         case 0:
1584                 call->unmarshall++;
1585                 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1586
1587                 /* extract the returned status record */
1588         case 1:
1589                 _debug("extract status");
1590                 ret = afs_extract_data(call, true);
1591                 if (ret < 0)
1592                         return ret;
1593
1594                 bp = call->buffer;
1595                 xdr_decode_YFSFetchVolumeStatus(&bp, call->reply[1]);
1596                 call->unmarshall++;
1597                 afs_extract_to_tmp(call);
1598
1599                 /* extract the volume name length */
1600         case 2:
1601                 ret = afs_extract_data(call, true);
1602                 if (ret < 0)
1603                         return ret;
1604
1605                 call->count = ntohl(call->tmp);
1606                 _debug("volname length: %u", call->count);
1607                 if (call->count >= AFSNAMEMAX)
1608                         return afs_protocol_error(call, -EBADMSG,
1609                                                   afs_eproto_volname_len);
1610                 size = (call->count + 3) & ~3; /* It's padded */
1611                 afs_extract_begin(call, call->reply[2], size);
1612                 call->unmarshall++;
1613
1614                 /* extract the volume name */
1615         case 3:
1616                 _debug("extract volname");
1617                 ret = afs_extract_data(call, true);
1618                 if (ret < 0)
1619                         return ret;
1620
1621                 p = call->reply[2];
1622                 p[call->count] = 0;
1623                 _debug("volname '%s'", p);
1624                 afs_extract_to_tmp(call);
1625                 call->unmarshall++;
1626
1627                 /* extract the offline message length */
1628         case 4:
1629                 ret = afs_extract_data(call, true);
1630                 if (ret < 0)
1631                         return ret;
1632
1633                 call->count = ntohl(call->tmp);
1634                 _debug("offline msg length: %u", call->count);
1635                 if (call->count >= AFSNAMEMAX)
1636                         return afs_protocol_error(call, -EBADMSG,
1637                                                   afs_eproto_offline_msg_len);
1638                 size = (call->count + 3) & ~3; /* It's padded */
1639                 afs_extract_begin(call, call->reply[2], size);
1640                 call->unmarshall++;
1641
1642                 /* extract the offline message */
1643         case 5:
1644                 _debug("extract offline");
1645                 ret = afs_extract_data(call, true);
1646                 if (ret < 0)
1647                         return ret;
1648
1649                 p = call->reply[2];
1650                 p[call->count] = 0;
1651                 _debug("offline '%s'", p);
1652
1653                 afs_extract_to_tmp(call);
1654                 call->unmarshall++;
1655
1656                 /* extract the message of the day length */
1657         case 6:
1658                 ret = afs_extract_data(call, true);
1659                 if (ret < 0)
1660                         return ret;
1661
1662                 call->count = ntohl(call->tmp);
1663                 _debug("motd length: %u", call->count);
1664                 if (call->count >= AFSNAMEMAX)
1665                         return afs_protocol_error(call, -EBADMSG,
1666                                                   afs_eproto_motd_len);
1667                 size = (call->count + 3) & ~3; /* It's padded */
1668                 afs_extract_begin(call, call->reply[2], size);
1669                 call->unmarshall++;
1670
1671                 /* extract the message of the day */
1672         case 7:
1673                 _debug("extract motd");
1674                 ret = afs_extract_data(call, false);
1675                 if (ret < 0)
1676                         return ret;
1677
1678                 p = call->reply[2];
1679                 p[call->count] = 0;
1680                 _debug("motd '%s'", p);
1681
1682                 call->unmarshall++;
1683
1684         case 8:
1685                 break;
1686         }
1687
1688         _leave(" = 0 [done]");
1689         return 0;
1690 }
1691
1692 /*
1693  * Destroy a YFS.GetVolumeStatus call.
1694  */
1695 static void yfs_get_volume_status_call_destructor(struct afs_call *call)
1696 {
1697         kfree(call->reply[2]);
1698         call->reply[2] = NULL;
1699         afs_flat_call_destructor(call);
1700 }
1701
1702 /*
1703  * YFS.GetVolumeStatus operation type
1704  */
1705 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1706         .name           = "YFS.GetVolumeStatus",
1707         .op             = yfs_FS_GetVolumeStatus,
1708         .deliver        = yfs_deliver_fs_get_volume_status,
1709         .destructor     = yfs_get_volume_status_call_destructor,
1710 };
1711
1712 /*
1713  * fetch the status of a volume
1714  */
1715 int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
1716                              struct afs_volume_status *vs)
1717 {
1718         struct afs_vnode *vnode = fc->vnode;
1719         struct afs_call *call;
1720         struct afs_net *net = afs_v2net(vnode);
1721         __be32 *bp;
1722         void *tmpbuf;
1723
1724         _enter("");
1725
1726         tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
1727         if (!tmpbuf)
1728                 return -ENOMEM;
1729
1730         call = afs_alloc_flat_call(net, &yfs_RXYFSGetVolumeStatus,
1731                                    sizeof(__be32) * 2 +
1732                                    sizeof(struct yfs_xdr_u64),
1733                                    sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1734                                    sizeof(__be32));
1735         if (!call) {
1736                 kfree(tmpbuf);
1737                 return -ENOMEM;
1738         }
1739
1740         call->key = fc->key;
1741         call->reply[0] = vnode;
1742         call->reply[1] = vs;
1743         call->reply[2] = tmpbuf;
1744
1745         /* marshall the parameters */
1746         bp = call->request;
1747         bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1748         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1749         bp = xdr_encode_u64(bp, vnode->fid.vid);
1750         yfs_check_req(call, bp);
1751
1752         afs_use_fs_server(call, fc->cbi);
1753         trace_afs_make_fs_call(call, &vnode->fid);
1754         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1755 }
1756
1757 /*
1758  * Deliver reply data to an YFS.SetLock, YFS.ExtendLock or YFS.ReleaseLock
1759  */
1760 static int yfs_deliver_fs_xxxx_lock(struct afs_call *call)
1761 {
1762         struct afs_vnode *vnode = call->reply[0];
1763         const __be32 *bp;
1764         int ret;
1765
1766         _enter("{%u}", call->unmarshall);
1767
1768         ret = afs_transfer_reply(call);
1769         if (ret < 0)
1770                 return ret;
1771
1772         /* unmarshall the reply once we've received all of it */
1773         bp = call->buffer;
1774         ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
1775                                 &call->expected_version, NULL);
1776         if (ret < 0)
1777                 return ret;
1778         xdr_decode_YFSVolSync(&bp, NULL);
1779
1780         _leave(" = 0 [done]");
1781         return 0;
1782 }
1783
1784 /*
1785  * YFS.SetLock operation type
1786  */
1787 static const struct afs_call_type yfs_RXYFSSetLock = {
1788         .name           = "YFS.SetLock",
1789         .op             = yfs_FS_SetLock,
1790         .deliver        = yfs_deliver_fs_xxxx_lock,
1791         .destructor     = afs_flat_call_destructor,
1792 };
1793
1794 /*
1795  * YFS.ExtendLock operation type
1796  */
1797 static const struct afs_call_type yfs_RXYFSExtendLock = {
1798         .name           = "YFS.ExtendLock",
1799         .op             = yfs_FS_ExtendLock,
1800         .deliver        = yfs_deliver_fs_xxxx_lock,
1801         .destructor     = afs_flat_call_destructor,
1802 };
1803
1804 /*
1805  * YFS.ReleaseLock operation type
1806  */
1807 static const struct afs_call_type yfs_RXYFSReleaseLock = {
1808         .name           = "YFS.ReleaseLock",
1809         .op             = yfs_FS_ReleaseLock,
1810         .deliver        = yfs_deliver_fs_xxxx_lock,
1811         .destructor     = afs_flat_call_destructor,
1812 };
1813
1814 /*
1815  * Set a lock on a file
1816  */
1817 int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
1818 {
1819         struct afs_vnode *vnode = fc->vnode;
1820         struct afs_call *call;
1821         struct afs_net *net = afs_v2net(vnode);
1822         __be32 *bp;
1823
1824         _enter("");
1825
1826         call = afs_alloc_flat_call(net, &yfs_RXYFSSetLock,
1827                                    sizeof(__be32) * 2 +
1828                                    sizeof(struct yfs_xdr_YFSFid) +
1829                                    sizeof(__be32),
1830                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1831                                    sizeof(struct yfs_xdr_YFSVolSync));
1832         if (!call)
1833                 return -ENOMEM;
1834
1835         call->key = fc->key;
1836         call->reply[0] = vnode;
1837
1838         /* marshall the parameters */
1839         bp = call->request;
1840         bp = xdr_encode_u32(bp, YFSSETLOCK);
1841         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1842         bp = xdr_encode_YFSFid(bp, &vnode->fid);
1843         bp = xdr_encode_u32(bp, type);
1844         yfs_check_req(call, bp);
1845
1846         afs_use_fs_server(call, fc->cbi);
1847         trace_afs_make_fs_call(call, &vnode->fid);
1848         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1849 }
1850
1851 /*
1852  * extend a lock on a file
1853  */
1854 int yfs_fs_extend_lock(struct afs_fs_cursor *fc)
1855 {
1856         struct afs_vnode *vnode = fc->vnode;
1857         struct afs_call *call;
1858         struct afs_net *net = afs_v2net(vnode);
1859         __be32 *bp;
1860
1861         _enter("");
1862
1863         call = afs_alloc_flat_call(net, &yfs_RXYFSExtendLock,
1864                                    sizeof(__be32) * 2 +
1865                                    sizeof(struct yfs_xdr_YFSFid),
1866                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1867                                    sizeof(struct yfs_xdr_YFSVolSync));
1868         if (!call)
1869                 return -ENOMEM;
1870
1871         call->key = fc->key;
1872         call->reply[0] = vnode;
1873
1874         /* marshall the parameters */
1875         bp = call->request;
1876         bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1877         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1878         bp = xdr_encode_YFSFid(bp, &vnode->fid);
1879         yfs_check_req(call, bp);
1880
1881         afs_use_fs_server(call, fc->cbi);
1882         trace_afs_make_fs_call(call, &vnode->fid);
1883         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1884 }
1885
1886 /*
1887  * release a lock on a file
1888  */
1889 int yfs_fs_release_lock(struct afs_fs_cursor *fc)
1890 {
1891         struct afs_vnode *vnode = fc->vnode;
1892         struct afs_call *call;
1893         struct afs_net *net = afs_v2net(vnode);
1894         __be32 *bp;
1895
1896         _enter("");
1897
1898         call = afs_alloc_flat_call(net, &yfs_RXYFSReleaseLock,
1899                                    sizeof(__be32) * 2 +
1900                                    sizeof(struct yfs_xdr_YFSFid),
1901                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1902                                    sizeof(struct yfs_xdr_YFSVolSync));
1903         if (!call)
1904                 return -ENOMEM;
1905
1906         call->key = fc->key;
1907         call->reply[0] = vnode;
1908
1909         /* marshall the parameters */
1910         bp = call->request;
1911         bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1912         bp = xdr_encode_u32(bp, 0); /* RPC flags */
1913         bp = xdr_encode_YFSFid(bp, &vnode->fid);
1914         yfs_check_req(call, bp);
1915
1916         afs_use_fs_server(call, fc->cbi);
1917         trace_afs_make_fs_call(call, &vnode->fid);
1918         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1919 }
1920
1921 /*
1922  * Deliver reply data to an FS.FetchStatus with no vnode.
1923  */
1924 static int yfs_deliver_fs_fetch_status(struct afs_call *call)
1925 {
1926         struct afs_file_status *status = call->reply[1];
1927         struct afs_callback *callback = call->reply[2];
1928         struct afs_volsync *volsync = call->reply[3];
1929         struct afs_vnode *vnode = call->reply[0];
1930         const __be32 *bp;
1931         int ret;
1932
1933         ret = afs_transfer_reply(call);
1934         if (ret < 0)
1935                 return ret;
1936
1937         _enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
1938
1939         /* unmarshall the reply once we've received all of it */
1940         bp = call->buffer;
1941         ret = yfs_decode_status(call, &bp, status, vnode,
1942                                 &call->expected_version, NULL);
1943         if (ret < 0)
1944                 return ret;
1945         xdr_decode_YFSCallBack_raw(&bp, callback);
1946         xdr_decode_YFSVolSync(&bp, volsync);
1947
1948         _leave(" = 0 [done]");
1949         return 0;
1950 }
1951
1952 /*
1953  * YFS.FetchStatus operation type
1954  */
1955 static const struct afs_call_type yfs_RXYFSFetchStatus = {
1956         .name           = "YFS.FetchStatus",
1957         .op             = yfs_FS_FetchStatus,
1958         .deliver        = yfs_deliver_fs_fetch_status,
1959         .destructor     = afs_flat_call_destructor,
1960 };
1961
1962 /*
1963  * Fetch the status information for a fid without needing a vnode handle.
1964  */
1965 int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
1966                         struct afs_net *net,
1967                         struct afs_fid *fid,
1968                         struct afs_file_status *status,
1969                         struct afs_callback *callback,
1970                         struct afs_volsync *volsync)
1971 {
1972         struct afs_call *call;
1973         __be32 *bp;
1974
1975         _enter(",%x,{%llx:%llu},,",
1976                key_serial(fc->key), fid->vid, fid->vnode);
1977
1978         call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus,
1979                                    sizeof(__be32) * 2 +
1980                                    sizeof(struct yfs_xdr_YFSFid),
1981                                    sizeof(struct yfs_xdr_YFSFetchStatus) +
1982                                    sizeof(struct yfs_xdr_YFSCallBack) +
1983                                    sizeof(struct yfs_xdr_YFSVolSync));
1984         if (!call) {
1985                 fc->ac.error = -ENOMEM;
1986                 return -ENOMEM;
1987         }
1988
1989         call->key = fc->key;
1990         call->reply[0] = NULL; /* vnode for fid[0] */
1991         call->reply[1] = status;
1992         call->reply[2] = callback;
1993         call->reply[3] = volsync;
1994         call->expected_version = 1; /* vnode->status.data_version */
1995
1996         /* marshall the parameters */
1997         bp = call->request;
1998         bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1999         bp = xdr_encode_u32(bp, 0); /* RPC flags */
2000         bp = xdr_encode_YFSFid(bp, fid);
2001         yfs_check_req(call, bp);
2002
2003         call->cb_break = fc->cb_break;
2004         afs_use_fs_server(call, fc->cbi);
2005         trace_afs_make_fs_call(call, fid);
2006         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
2007 }
2008
2009 /*
2010  * Deliver reply data to an YFS.InlineBulkStatus call
2011  */
2012 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
2013 {
2014         struct afs_file_status *statuses;
2015         struct afs_callback *callbacks;
2016         struct afs_vnode *vnode = call->reply[0];
2017         const __be32 *bp;
2018         u32 tmp;
2019         int ret;
2020
2021         _enter("{%u}", call->unmarshall);
2022
2023         switch (call->unmarshall) {
2024         case 0:
2025                 afs_extract_to_tmp(call);
2026                 call->unmarshall++;
2027
2028                 /* Extract the file status count and array in two steps */
2029         case 1:
2030                 _debug("extract status count");
2031                 ret = afs_extract_data(call, true);
2032                 if (ret < 0)
2033                         return ret;
2034
2035                 tmp = ntohl(call->tmp);
2036                 _debug("status count: %u/%u", tmp, call->count2);
2037                 if (tmp != call->count2)
2038                         return afs_protocol_error(call, -EBADMSG,
2039                                                   afs_eproto_ibulkst_count);
2040
2041                 call->count = 0;
2042                 call->unmarshall++;
2043         more_counts:
2044                 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
2045
2046         case 2:
2047                 _debug("extract status array %u", call->count);
2048                 ret = afs_extract_data(call, true);
2049                 if (ret < 0)
2050                         return ret;
2051
2052                 bp = call->buffer;
2053                 statuses = call->reply[1];
2054                 ret = yfs_decode_status(call, &bp, &statuses[call->count],
2055                                         call->count == 0 ? vnode : NULL,
2056                                         NULL, NULL);
2057                 if (ret < 0)
2058                         return ret;
2059
2060                 call->count++;
2061                 if (call->count < call->count2)
2062                         goto more_counts;
2063
2064                 call->count = 0;
2065                 call->unmarshall++;
2066                 afs_extract_to_tmp(call);
2067
2068                 /* Extract the callback count and array in two steps */
2069         case 3:
2070                 _debug("extract CB count");
2071                 ret = afs_extract_data(call, true);
2072                 if (ret < 0)
2073                         return ret;
2074
2075                 tmp = ntohl(call->tmp);
2076                 _debug("CB count: %u", tmp);
2077                 if (tmp != call->count2)
2078                         return afs_protocol_error(call, -EBADMSG,
2079                                                   afs_eproto_ibulkst_cb_count);
2080                 call->count = 0;
2081                 call->unmarshall++;
2082         more_cbs:
2083                 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
2084
2085         case 4:
2086                 _debug("extract CB array");
2087                 ret = afs_extract_data(call, true);
2088                 if (ret < 0)
2089                         return ret;
2090
2091                 _debug("unmarshall CB array");
2092                 bp = call->buffer;
2093                 callbacks = call->reply[2];
2094                 xdr_decode_YFSCallBack_raw(&bp, &callbacks[call->count]);
2095                 statuses = call->reply[1];
2096                 if (call->count == 0 && vnode && statuses[0].abort_code == 0) {
2097                         bp = call->buffer;
2098                         xdr_decode_YFSCallBack(call, vnode, &bp);
2099                 }
2100                 call->count++;
2101                 if (call->count < call->count2)
2102                         goto more_cbs;
2103
2104                 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
2105                 call->unmarshall++;
2106
2107         case 5:
2108                 ret = afs_extract_data(call, false);
2109                 if (ret < 0)
2110                         return ret;
2111
2112                 bp = call->buffer;
2113                 xdr_decode_YFSVolSync(&bp, call->reply[3]);
2114
2115                 call->unmarshall++;
2116
2117         case 6:
2118                 break;
2119         }
2120
2121         _leave(" = 0 [done]");
2122         return 0;
2123 }
2124
2125 /*
2126  * FS.InlineBulkStatus operation type
2127  */
2128 static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
2129         .name           = "YFS.InlineBulkStatus",
2130         .op             = yfs_FS_InlineBulkStatus,
2131         .deliver        = yfs_deliver_fs_inline_bulk_status,
2132         .destructor     = afs_flat_call_destructor,
2133 };
2134
2135 /*
2136  * Fetch the status information for up to 1024 files
2137  */
2138 int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
2139                               struct afs_net *net,
2140                               struct afs_fid *fids,
2141                               struct afs_file_status *statuses,
2142                               struct afs_callback *callbacks,
2143                               unsigned int nr_fids,
2144                               struct afs_volsync *volsync)
2145 {
2146         struct afs_call *call;
2147         __be32 *bp;
2148         int i;
2149
2150         _enter(",%x,{%llx:%llu},%u",
2151                key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
2152
2153         call = afs_alloc_flat_call(net, &yfs_RXYFSInlineBulkStatus,
2154                                    sizeof(__be32) +
2155                                    sizeof(__be32) +
2156                                    sizeof(__be32) +
2157                                    sizeof(struct yfs_xdr_YFSFid) * nr_fids,
2158                                    sizeof(struct yfs_xdr_YFSFetchStatus));
2159         if (!call) {
2160                 fc->ac.error = -ENOMEM;
2161                 return -ENOMEM;
2162         }
2163
2164         call->key = fc->key;
2165         call->reply[0] = NULL; /* vnode for fid[0] */
2166         call->reply[1] = statuses;
2167         call->reply[2] = callbacks;
2168         call->reply[3] = volsync;
2169         call->count2 = nr_fids;
2170
2171         /* marshall the parameters */
2172         bp = call->request;
2173         bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
2174         bp = xdr_encode_u32(bp, 0); /* RPCFlags */
2175         bp = xdr_encode_u32(bp, nr_fids);
2176         for (i = 0; i < nr_fids; i++)
2177                 bp = xdr_encode_YFSFid(bp, &fids[i]);
2178         yfs_check_req(call, bp);
2179
2180         call->cb_break = fc->cb_break;
2181         afs_use_fs_server(call, fc->cbi);
2182         trace_afs_make_fs_call(call, &fids[0]);
2183         return afs_make_call(&fc->ac, call, GFP_NOFS, false);
2184 }