drivers/staging/lustre/lustre/mdc/mdc_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_MDC
  38 #include "../include/lustre_net.h"
  39 #include "../include/lustre/lustre_idl.h"
  40 #include "mdc_internal.h"
  41
  42
  43 static void __mdc_pack_body(struct mdt_body *b, __u32 suppgid)
  44 {
  45         LASSERT(b != NULL);
  46
  47         b->suppgid = suppgid;
  48         b->uid = from_kuid(&init_user_ns, current_uid());
  49         b->gid = from_kgid(&init_user_ns, current_gid());
  50         b->fsuid = from_kuid(&init_user_ns, current_fsuid());
  51         b->fsgid = from_kgid(&init_user_ns, current_fsgid());
  52         b->capability = cfs_curproc_cap_pack();
  53 }
  54
  55 void mdc_pack_capa(struct ptlrpc_request *req,
  56                    const struct req_msg_field *field,
  57                    struct obd_capa *oc)
  58 {
  59         struct req_capsule *pill = &req->rq_pill;
  60         struct lustre_capa *c;
  61
  62         if (oc == NULL) {
  63                 LASSERT(req_capsule_get_size(pill, field, RCL_CLIENT) == 0);
  64                 return;
  65         }
  66
  67         c = req_capsule_client_get(pill, field);
  68         LASSERT(c != NULL);
  69         capa_cpy(c, oc);
  70         DEBUG_CAPA(D_SEC, c, "pack");
  71 }
  72
  73 void mdc_is_subdir_pack(struct ptlrpc_request *req, const struct lu_fid *pfid,
  74                         const struct lu_fid *cfid, int flags)
  75 {
  76         struct mdt_body *b = req_capsule_client_get(&req->rq_pill,
  77                                                     &RMF_MDT_BODY);
  78
  79         if (pfid) {
  80                 b->fid1 = *pfid;
  81                 b->valid = OBD_MD_FLID;
  82         }
  83         if (cfid)
  84                 b->fid2 = *cfid;
  85         b->flags = flags;
  86 }
  87
  88 void mdc_swap_layouts_pack(struct ptlrpc_request *req,
  89                            struct md_op_data *op_data)
  90 {
  91         struct mdt_body *b = req_capsule_client_get(&req->rq_pill,
  92                                                     &RMF_MDT_BODY);
  93
  94         __mdc_pack_body(b, op_data->op_suppgids[0]);
  95         b->fid1 = op_data->op_fid1;
  96         b->fid2 = op_data->op_fid2;
  97         b->valid |= OBD_MD_FLID;
  98
  99         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 100         mdc_pack_capa(req, &RMF_CAPA2, op_data->op_capa2);
 101 }
 102
 103 void mdc_pack_body(struct ptlrpc_request *req,
 104                    const struct lu_fid *fid, struct obd_capa *oc,
 105                    __u64 valid, int ea_size, __u32 suppgid, int flags)
 106 {
 107         struct mdt_body *b = req_capsule_client_get(&req->rq_pill,
 108                                                     &RMF_MDT_BODY);
 109         LASSERT(b != NULL);
 110         b->valid = valid;
 111         b->eadatasize = ea_size;
 112         b->flags = flags;
 113         __mdc_pack_body(b, suppgid);
 114         if (fid) {
 115                 b->fid1 = *fid;
 116                 b->valid |= OBD_MD_FLID;
 117                 mdc_pack_capa(req, &RMF_CAPA1, oc);
 118         }
 119 }
 120
 121 void mdc_readdir_pack(struct ptlrpc_request *req, __u64 pgoff,
 122                       __u32 size, const struct lu_fid *fid, struct obd_capa *oc)
 123 {
 124         struct mdt_body *b = req_capsule_client_get(&req->rq_pill,
 125                                                     &RMF_MDT_BODY);
 126         b->fid1 = *fid;
 127         b->valid |= OBD_MD_FLID;
 128         b->size = pgoff;                       /* !! */
 129         b->nlink = size;                        /* !! */
 130         __mdc_pack_body(b, -1);
 131         b->mode = LUDA_FID | LUDA_TYPE;
 132
 133         mdc_pack_capa(req, &RMF_CAPA1, oc);
 134 }
 135
 136 /* packing of MDS records */
 137 void mdc_create_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
 138                      const void *data, int datalen, __u32 mode,
 139                      __u32 uid, __u32 gid, cfs_cap_t cap_effective, __u64 rdev)
 140 {
 141         struct mdt_rec_create   *rec;
 142         char                    *tmp;
 143         __u64                    flags;
 144
 145         CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_create));
 146         rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 147
 148
 149         rec->cr_opcode   = REINT_CREATE;
 150         rec->cr_fsuid    = uid;
 151         rec->cr_fsgid    = gid;
 152         rec->cr_cap      = cap_effective;
 153         rec->cr_fid1     = op_data->op_fid1;
 154         rec->cr_fid2     = op_data->op_fid2;
 155         rec->cr_mode     = mode;
 156         rec->cr_rdev     = rdev;
 157         rec->cr_time     = op_data->op_mod_time;
 158         rec->cr_suppgid1 = op_data->op_suppgids[0];
 159         rec->cr_suppgid2 = op_data->op_suppgids[1];
 160         flags = op_data->op_flags & MF_SOM_LOCAL_FLAGS;
 161         if (op_data->op_bias & MDS_CREATE_VOLATILE)
 162                 flags |= MDS_OPEN_VOLATILE;
 163         set_mrc_cr_flags(rec, flags);
 164         rec->cr_bias     = op_data->op_bias;
 165         rec->cr_umask    = current_umask();
 166
 167         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 168
 169         tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 170         LOGL0(op_data->op_name, op_data->op_namelen, tmp);
 171
 172         if (data) {
 173                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 174                 memcpy(tmp, data, datalen);
 175         }
 176 }
 177
 178 static __u64 mds_pack_open_flags(__u64 flags, __u32 mode)
 179 {
 180         __u64 cr_flags = (flags & (FMODE_READ | FMODE_WRITE |
 181                                    MDS_OPEN_HAS_EA | MDS_OPEN_HAS_OBJS |
 182                                    MDS_OPEN_OWNEROVERRIDE | MDS_OPEN_LOCK |
 183                                    MDS_OPEN_BY_FID | MDS_OPEN_LEASE |
 184                                    MDS_OPEN_RELEASE));
 185         if (flags & O_CREAT)
 186                 cr_flags |= MDS_OPEN_CREAT;
 187         if (flags & O_EXCL)
 188                 cr_flags |= MDS_OPEN_EXCL;
 189         if (flags & O_TRUNC)
 190                 cr_flags |= MDS_OPEN_TRUNC;
 191         if (flags & O_APPEND)
 192                 cr_flags |= MDS_OPEN_APPEND;
 193         if (flags & O_SYNC)
 194                 cr_flags |= MDS_OPEN_SYNC;
 195         if (flags & O_DIRECTORY)
 196                 cr_flags |= MDS_OPEN_DIRECTORY;
 197         if (flags & __FMODE_EXEC)
 198                 cr_flags |= MDS_FMODE_EXEC;
 199         if (cl_is_lov_delay_create(flags))
 200                 cr_flags |= MDS_OPEN_DELAY_CREATE;
 201
 202         if (flags & O_NONBLOCK)
 203                 cr_flags |= MDS_OPEN_NORESTORE;
 204
 205         return cr_flags;
 206 }
 207
 208 /* packing of MDS records */
 209 void mdc_open_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
 210                    __u32 mode, __u64 rdev, __u64 flags, const void *lmm,
 211                    int lmmlen)
 212 {
 213         struct mdt_rec_create *rec;
 214         char *tmp;
 215         __u64 cr_flags;
 216
 217         CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_create));
 218         rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 219
 220         /* XXX do something about time, uid, gid */
 221         rec->cr_opcode   = REINT_OPEN;
 222         rec->cr_fsuid    = from_kuid(&init_user_ns, current_fsuid());
 223         rec->cr_fsgid    = from_kgid(&init_user_ns, current_fsgid());
 224         rec->cr_cap      = cfs_curproc_cap_pack();
 225         if (op_data != NULL) {
 226                 rec->cr_fid1 = op_data->op_fid1;
 227                 rec->cr_fid2 = op_data->op_fid2;
 228         }
 229         rec->cr_mode     = mode;
 230         cr_flags = mds_pack_open_flags(flags, mode);
 231         rec->cr_rdev     = rdev;
 232         rec->cr_time     = op_data->op_mod_time;
 233         rec->cr_suppgid1 = op_data->op_suppgids[0];
 234         rec->cr_suppgid2 = op_data->op_suppgids[1];
 235         rec->cr_bias     = op_data->op_bias;
 236         rec->cr_umask    = current_umask();
 237         rec->cr_old_handle = op_data->op_handle;
 238
 239         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 240         /* the next buffer is child capa, which is used for replay,
 241          * will be packed from the data in reply message. */
 242
 243         if (op_data->op_name) {
 244                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 245                 LOGL0(op_data->op_name, op_data->op_namelen, tmp);
 246                 if (op_data->op_bias & MDS_CREATE_VOLATILE)
 247                         cr_flags |= MDS_OPEN_VOLATILE;
 248         }
 249
 250         if (lmm) {
 251                 cr_flags |= MDS_OPEN_HAS_EA;
 252                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 253                 memcpy(tmp, lmm, lmmlen);
 254         }
 255         set_mrc_cr_flags(rec, cr_flags);
 256 }
 257
 258 static inline __u64 attr_pack(unsigned int ia_valid)
 259 {
 260         __u64 sa_valid = 0;
 261
 262         if (ia_valid & ATTR_MODE)
 263                 sa_valid |= MDS_ATTR_MODE;
 264         if (ia_valid & ATTR_UID)
 265                 sa_valid |= MDS_ATTR_UID;
 266         if (ia_valid & ATTR_GID)
 267                 sa_valid |= MDS_ATTR_GID;
 268         if (ia_valid & ATTR_SIZE)
 269                 sa_valid |= MDS_ATTR_SIZE;
 270         if (ia_valid & ATTR_ATIME)
 271                 sa_valid |= MDS_ATTR_ATIME;
 272         if (ia_valid & ATTR_MTIME)
 273                 sa_valid |= MDS_ATTR_MTIME;
 274         if (ia_valid & ATTR_CTIME)
 275                 sa_valid |= MDS_ATTR_CTIME;
 276         if (ia_valid & ATTR_ATIME_SET)
 277                 sa_valid |= MDS_ATTR_ATIME_SET;
 278         if (ia_valid & ATTR_MTIME_SET)
 279                 sa_valid |= MDS_ATTR_MTIME_SET;
 280         if (ia_valid & ATTR_FORCE)
 281                 sa_valid |= MDS_ATTR_FORCE;
 282         if (ia_valid & ATTR_ATTR_FLAG)
 283                 sa_valid |= MDS_ATTR_ATTR_FLAG;
 284         if (ia_valid & ATTR_KILL_SUID)
 285                 sa_valid |=  MDS_ATTR_KILL_SUID;
 286         if (ia_valid & ATTR_KILL_SGID)
 287                 sa_valid |= MDS_ATTR_KILL_SGID;
 288         if (ia_valid & ATTR_CTIME_SET)
 289                 sa_valid |= MDS_ATTR_CTIME_SET;
 290         if (ia_valid & ATTR_FROM_OPEN)
 291                 sa_valid |= MDS_ATTR_FROM_OPEN;
 292         if (ia_valid & ATTR_BLOCKS)
 293                 sa_valid |= MDS_ATTR_BLOCKS;
 294         if (ia_valid & MDS_OPEN_OWNEROVERRIDE)
 295                 /* NFSD hack (see bug 5781) */
 296                 sa_valid |= MDS_OPEN_OWNEROVERRIDE;
 297         return sa_valid;
 298 }
 299
 300 static void mdc_setattr_pack_rec(struct mdt_rec_setattr *rec,
 301                                  struct md_op_data *op_data)
 302 {
 303         rec->sa_opcode  = REINT_SETATTR;
 304         rec->sa_fsuid   = from_kuid(&init_user_ns, current_fsuid());
 305         rec->sa_fsgid   = from_kgid(&init_user_ns, current_fsgid());
 306         rec->sa_cap     = cfs_curproc_cap_pack();
 307         rec->sa_suppgid = -1;
 308
 309         rec->sa_fid    = op_data->op_fid1;
 310         rec->sa_valid  = attr_pack(op_data->op_attr.ia_valid);
 311         rec->sa_mode   = op_data->op_attr.ia_mode;
 312         rec->sa_uid    = from_kuid(&init_user_ns, op_data->op_attr.ia_uid);
 313         rec->sa_gid    = from_kgid(&init_user_ns, op_data->op_attr.ia_gid);
 314         rec->sa_size   = op_data->op_attr.ia_size;
 315         rec->sa_blocks = op_data->op_attr_blocks;
 316         rec->sa_atime  = LTIME_S(op_data->op_attr.ia_atime);
 317         rec->sa_mtime  = LTIME_S(op_data->op_attr.ia_mtime);
 318         rec->sa_ctime  = LTIME_S(op_data->op_attr.ia_ctime);
 319         rec->sa_attr_flags =
 320                         ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags;
 321         if ((op_data->op_attr.ia_valid & ATTR_GID) &&
 322             in_group_p(op_data->op_attr.ia_gid))
 323                 rec->sa_suppgid =
 324                         from_kgid(&init_user_ns, op_data->op_attr.ia_gid);
 325         else
 326                 rec->sa_suppgid = op_data->op_suppgids[0];
 327
 328         rec->sa_bias = op_data->op_bias;
 329 }
 330
 331 static void mdc_ioepoch_pack(struct mdt_ioepoch *epoch,
 332                              struct md_op_data *op_data)
 333 {
 334         memcpy(&epoch->handle, &op_data->op_handle, sizeof(epoch->handle));
 335         epoch->ioepoch = op_data->op_ioepoch;
 336         epoch->flags = op_data->op_flags & MF_SOM_LOCAL_FLAGS;
 337 }
 338
 339 void mdc_setattr_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
 340                       void *ea, int ealen, void *ea2, int ea2len)
 341 {
 342         struct mdt_rec_setattr *rec;
 343         struct mdt_ioepoch *epoch;
 344         struct lov_user_md *lum = NULL;
 345
 346         CLASSERT(sizeof(struct mdt_rec_reint) ==
 347                                         sizeof(struct mdt_rec_setattr));
 348         rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 349         mdc_setattr_pack_rec(rec, op_data);
 350
 351         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 352
 353         if (op_data->op_flags & (MF_SOM_CHANGE | MF_EPOCH_OPEN)) {
 354                 epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
 355                 mdc_ioepoch_pack(epoch, op_data);
 356         }
 357
 358         if (ealen == 0)
 359                 return;
 360
 361         lum = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 362         if (ea == NULL) { /* Remove LOV EA */
 363                 lum->lmm_magic = LOV_USER_MAGIC_V1;
 364                 lum->lmm_stripe_size = 0;
 365                 lum->lmm_stripe_count = 0;
 366                 lum->lmm_stripe_offset = (typeof(lum->lmm_stripe_offset))(-1);
 367         } else {
 368                 memcpy(lum, ea, ealen);
 369         }
 370
 371         if (ea2len == 0)
 372                 return;
 373
 374         memcpy(req_capsule_client_get(&req->rq_pill, &RMF_LOGCOOKIES), ea2,
 375                ea2len);
 376 }
 377
 378 void mdc_unlink_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 379 {
 380         struct mdt_rec_unlink *rec;
 381         char *tmp;
 382
 383         CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_unlink));
 384         rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 385         LASSERT(rec != NULL);
 386
 387         rec->ul_opcode   = op_data->op_cli_flags & CLI_RM_ENTRY ?
 388                                         REINT_RMENTRY : REINT_UNLINK;
 389         rec->ul_fsuid    = op_data->op_fsuid;
 390         rec->ul_fsgid    = op_data->op_fsgid;
 391         rec->ul_cap      = op_data->op_cap;
 392         rec->ul_mode     = op_data->op_mode;
 393         rec->ul_suppgid1 = op_data->op_suppgids[0];
 394         rec->ul_suppgid2 = -1;
 395         rec->ul_fid1     = op_data->op_fid1;
 396         rec->ul_fid2     = op_data->op_fid2;
 397         rec->ul_time     = op_data->op_mod_time;
 398         rec->ul_bias     = op_data->op_bias;
 399
 400         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 401
 402         tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 403         LASSERT(tmp != NULL);
 404         LOGL0(op_data->op_name, op_data->op_namelen, tmp);
 405 }
 406
 407 void mdc_link_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 408 {
 409         struct mdt_rec_link *rec;
 410         char *tmp;
 411
 412         CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_link));
 413         rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 414         LASSERT(rec != NULL);
 415
 416         rec->lk_opcode   = REINT_LINK;
 417         rec->lk_fsuid    = op_data->op_fsuid; /* current->fsuid; */
 418         rec->lk_fsgid    = op_data->op_fsgid; /* current->fsgid; */
 419         rec->lk_cap      = op_data->op_cap;   /* current->cap_effective; */
 420         rec->lk_suppgid1 = op_data->op_suppgids[0];
 421         rec->lk_suppgid2 = op_data->op_suppgids[1];
 422         rec->lk_fid1     = op_data->op_fid1;
 423         rec->lk_fid2     = op_data->op_fid2;
 424         rec->lk_time     = op_data->op_mod_time;
 425         rec->lk_bias     = op_data->op_bias;
 426
 427         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 428         mdc_pack_capa(req, &RMF_CAPA2, op_data->op_capa2);
 429
 430         tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 431         LOGL0(op_data->op_name, op_data->op_namelen, tmp);
 432 }
 433
 434 void mdc_rename_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
 435                      const char *old, int oldlen, const char *new, int newlen)
 436 {
 437         struct mdt_rec_rename *rec;
 438         char *tmp;
 439
 440         CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_rename));
 441         rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 442
 443         /* XXX do something about time, uid, gid */
 444         rec->rn_opcode   = REINT_RENAME;
 445         rec->rn_fsuid    = op_data->op_fsuid;
 446         rec->rn_fsgid    = op_data->op_fsgid;
 447         rec->rn_cap      = op_data->op_cap;
 448         rec->rn_suppgid1 = op_data->op_suppgids[0];
 449         rec->rn_suppgid2 = op_data->op_suppgids[1];
 450         rec->rn_fid1     = op_data->op_fid1;
 451         rec->rn_fid2     = op_data->op_fid2;
 452         rec->rn_time     = op_data->op_mod_time;
 453         rec->rn_mode     = op_data->op_mode;
 454         rec->rn_bias     = op_data->op_bias;
 455
 456         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 457         mdc_pack_capa(req, &RMF_CAPA2, op_data->op_capa2);
 458
 459         tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 460         LOGL0(old, oldlen, tmp);
 461
 462         if (new) {
 463                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SYMTGT);
 464                 LOGL0(new, newlen, tmp);
 465         }
 466 }
 467
 468 void mdc_getattr_pack(struct ptlrpc_request *req, __u64 valid, int flags,
 469                       struct md_op_data *op_data, int ea_size)
 470 {
 471         struct mdt_body *b = req_capsule_client_get(&req->rq_pill,
 472                                                     &RMF_MDT_BODY);
 473
 474         b->valid = valid;
 475         if (op_data->op_bias & MDS_CHECK_SPLIT)
 476                 b->valid |= OBD_MD_FLCKSPLIT;
 477         if (op_data->op_bias & MDS_CROSS_REF)
 478                 b->valid |= OBD_MD_FLCROSSREF;
 479         b->eadatasize = ea_size;
 480         b->flags = flags;
 481         __mdc_pack_body(b, op_data->op_suppgids[0]);
 482
 483         b->fid1 = op_data->op_fid1;
 484         b->fid2 = op_data->op_fid2;
 485         b->valid |= OBD_MD_FLID;
 486
 487         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 488
 489         if (op_data->op_name) {
 490                 char *tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 491
 492                 LOGL0(op_data->op_name, op_data->op_namelen, tmp);
 493
 494         }
 495 }
 496
 497 static void mdc_hsm_release_pack(struct ptlrpc_request *req,
 498                                  struct md_op_data *op_data)
 499 {
 500         if (op_data->op_bias & MDS_HSM_RELEASE) {
 501                 struct close_data *data;
 502                 struct ldlm_lock *lock;
 503
 504                 data = req_capsule_client_get(&req->rq_pill, &RMF_CLOSE_DATA);
 505                 LASSERT(data != NULL);
 506
 507                 lock = ldlm_handle2lock(&op_data->op_lease_handle);
 508                 if (lock != NULL) {
 509                         data->cd_handle = lock->l_remote_handle;
 510                         ldlm_lock_put(lock);
 511                 }
 512                 ldlm_cli_cancel(&op_data->op_lease_handle, LCF_LOCAL);
 513
 514                 data->cd_data_version = op_data->op_data_version;
 515                 data->cd_fid = op_data->op_fid2;
 516         }
 517 }
 518
 519 void mdc_close_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 520 {
 521         struct mdt_ioepoch *epoch;
 522         struct mdt_rec_setattr *rec;
 523
 524         epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
 525         rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 526
 527         mdc_setattr_pack_rec(rec, op_data);
 528         mdc_pack_capa(req, &RMF_CAPA1, op_data->op_capa1);
 529         mdc_ioepoch_pack(epoch, op_data);
 530         mdc_hsm_release_pack(req, op_data);
 531 }
 532
 533 static int mdc_req_avail(struct client_obd *cli, struct mdc_cache_waiter *mcw)
 534 {
 535         int rc;
 536
 537         client_obd_list_lock(&cli->cl_loi_list_lock);
 538         rc = list_empty(&mcw->mcw_entry);
 539         client_obd_list_unlock(&cli->cl_loi_list_lock);
 540         return rc;
 541 };
 542
 543 /* We record requests in flight in cli->cl_r_in_flight here.
 544  * There is only one write rpc possible in mdc anyway. If this to change
 545  * in the future - the code may need to be revisited. */
 546 int mdc_enter_request(struct client_obd *cli)
 547 {
 548         int rc = 0;
 549         struct mdc_cache_waiter mcw;
 550         struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
 551
 552         client_obd_list_lock(&cli->cl_loi_list_lock);
 553         if (cli->cl_r_in_flight >= cli->cl_max_rpcs_in_flight) {
 554                 list_add_tail(&mcw.mcw_entry, &cli->cl_cache_waiters);
 555                 init_waitqueue_head(&mcw.mcw_waitq);
 556                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 557                 rc = l_wait_event(mcw.mcw_waitq, mdc_req_avail(cli, &mcw),
 558                                   &lwi);
 559                 if (rc) {
 560                         client_obd_list_lock(&cli->cl_loi_list_lock);
 561                         if (list_empty(&mcw.mcw_entry))
 562                                 cli->cl_r_in_flight--;
 563                         list_del_init(&mcw.mcw_entry);
 564                         client_obd_list_unlock(&cli->cl_loi_list_lock);
 565                 }
 566         } else {
 567                 cli->cl_r_in_flight++;
 568                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 569         }
 570         return rc;
 571 }
 572
 573 void mdc_exit_request(struct client_obd *cli)
 574 {
 575         struct list_head *l, *tmp;
 576         struct mdc_cache_waiter *mcw;
 577
 578         client_obd_list_lock(&cli->cl_loi_list_lock);
 579         cli->cl_r_in_flight--;
 580         list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
 581                 if (cli->cl_r_in_flight >= cli->cl_max_rpcs_in_flight) {
 582                         /* No free request slots anymore */
 583                         break;
 584                 }
 585
 586                 mcw = list_entry(l, struct mdc_cache_waiter, mcw_entry);
 587                 list_del_init(&mcw->mcw_entry);
 588                 cli->cl_r_in_flight++;
 589                 wake_up(&mcw->mcw_waitq);
 590         }
 591         /* Empty waiting list? Decrease reqs in-flight number */
 592
 593         client_obd_list_unlock(&cli->cl_loi_list_lock);
 594 }