drivers/staging/lustre/lustre/include/md_object.h

   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) 2007, 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  * lustre/include/md_object.h
  37  *
  38  * Extension of lu_object.h for metadata objects
  39  */
  40
  41 #ifndef _LUSTRE_MD_OBJECT_H
  42 #define _LUSTRE_MD_OBJECT_H
  43
  44 /** \defgroup md md
  45  * Sub-class of lu_object with methods common for "meta-data" objects in MDT
  46  * stack.
  47  *
  48  * Meta-data objects implement namespace operations: you can link, unlink
  49  * them, and treat them as directories.
  50  *
  51  * Examples: mdt, cmm, and mdt are implementations of md interface.
  52  * @{
  53  */
  54
  55
  56 /*
  57  * super-class definitions.
  58  */
  59 #include "dt_object.h"
  60
  61 struct md_device;
  62 struct md_device_operations;
  63 struct md_object;
  64 struct obd_export;
  65
  66 enum {
  67         UCRED_INVALID   = -1,
  68         UCRED_INIT      = 0,
  69         UCRED_OLD       = 1,
  70         UCRED_NEW       = 2
  71 };
  72
  73 enum {
  74         MD_CAPAINFO_MAX = 5
  75 };
  76
  77 /** there are at most 5 fids in one operation, see rename, NOTE the last one
  78  * is a temporary one used for is_subdir() */
  79 struct md_capainfo {
  80         __u32              mc_auth;
  81         __u32              mc_padding;
  82         struct lu_fid      mc_fid[MD_CAPAINFO_MAX];
  83         struct lustre_capa     *mc_capa[MD_CAPAINFO_MAX];
  84 };
  85
  86 struct md_quota {
  87         struct obd_export       *mq_exp;
  88 };
  89
  90 /**
  91  * Implemented in mdd/mdd_handler.c.
  92  *
  93  * XXX should be moved into separate .h/.c together with all md security
  94  * related definitions.
  95  */
  96 struct md_capainfo *md_capainfo(const struct lu_env *env);
  97 struct md_quota *md_quota(const struct lu_env *env);
  98
  99 /** metadata attributes */
 100 enum ma_valid {
 101         MA_INODE     = (1 << 0),
 102         MA_LOV       = (1 << 1),
 103         MA_COOKIE    = (1 << 2),
 104         MA_FLAGS     = (1 << 3),
 105         MA_LMV       = (1 << 4),
 106         MA_ACL_DEF   = (1 << 5),
 107         MA_LOV_DEF   = (1 << 6),
 108         MA_LAY_GEN   = (1 << 7),
 109         MA_HSM       = (1 << 8),
 110         MA_SOM       = (1 << 9),
 111         MA_PFID      = (1 << 10)
 112 };
 113
 114 typedef enum {
 115         MDL_MINMODE  = 0,
 116         MDL_EX       = 1,
 117         MDL_PW       = 2,
 118         MDL_PR       = 4,
 119         MDL_CW       = 8,
 120         MDL_CR       = 16,
 121         MDL_NL       = 32,
 122         MDL_GROUP    = 64,
 123         MDL_MAXMODE
 124 } mdl_mode_t;
 125
 126 typedef enum {
 127         MDT_NUL_LOCK = 0,
 128         MDT_REG_LOCK = (1 << 0),
 129         MDT_PDO_LOCK = (1 << 1)
 130 } mdl_type_t;
 131
 132 /* memory structure for hsm attributes
 133  * for fields description see the on disk structure hsm_attrs
 134  * which is defined in lustre_idl.h
 135  */
 136 struct md_hsm {
 137         __u32   mh_compat;
 138         __u32   mh_flags;
 139         __u64   mh_arch_id;
 140         __u64   mh_arch_ver;
 141 };
 142
 143 #define IOEPOCH_INVAL 0
 144
 145 /* memory structure for som attributes
 146  * for fields description see the on disk structure som_attrs
 147  * which is defined in lustre_idl.h
 148  */
 149 struct md_som_data {
 150         __u32   msd_compat;
 151         __u32   msd_incompat;
 152         __u64   msd_ioepoch;
 153         __u64   msd_size;
 154         __u64   msd_blocks;
 155         __u64   msd_mountid;
 156 };
 157
 158 struct md_attr {
 159         __u64              ma_valid;
 160         __u64              ma_need;
 161         __u64              ma_attr_flags;
 162         struct lu_attr    ma_attr;
 163         struct lu_fid      ma_pfid;
 164         struct md_hsm      ma_hsm;
 165         struct lov_mds_md      *ma_lmm;
 166         struct lmv_stripe_md   *ma_lmv;
 167         void               *ma_acl;
 168         struct llog_cookie     *ma_cookie;
 169         struct lustre_capa     *ma_capa;
 170         struct md_som_data     *ma_som;
 171         int                  ma_lmm_size;
 172         int                  ma_lmv_size;
 173         int                  ma_acl_size;
 174         int                  ma_cookie_size;
 175         __u16              ma_layout_gen;
 176 };
 177
 178 /** Additional parameters for create */
 179 struct md_op_spec {
 180         union {
 181                 /** symlink target */
 182                 const char             *sp_symname;
 183                 /** parent FID for cross-ref mkdir */
 184                 const struct lu_fid      *sp_pfid;
 185                 /** eadata for regular files */
 186                 struct md_spec_reg {
 187                         /** lov objs exist already */
 188                         const struct lu_fid   *fid;
 189                         const void *eadata;
 190                         int  eadatalen;
 191                 } sp_ea;
 192         } u;
 193
 194         /** Create flag from client: such as MDS_OPEN_CREAT, and others. */
 195         __u64      sp_cr_flags;
 196
 197         /** don't create lov objects or llog cookie - this replay */
 198         unsigned int no_create:1,
 199                      sp_cr_lookup:1, /* do lookup sanity check or not. */
 200                      sp_rm_entry:1;  /* only remove name entry */
 201
 202         /** Current lock mode for parent dir where create is performing. */
 203         mdl_mode_t sp_cr_mode;
 204
 205         /** to create directory */
 206         const struct dt_index_features *sp_feat;
 207 };
 208
 209 /**
 210  * Operations implemented for each md object (both directory and leaf).
 211  */
 212 struct md_object_operations {
 213         int (*moo_permission)(const struct lu_env *env,
 214                               struct md_object *pobj, struct md_object *cobj,
 215                               struct md_attr *attr, int mask);
 216
 217         int (*moo_attr_get)(const struct lu_env *env, struct md_object *obj,
 218                             struct md_attr *attr);
 219
 220         int (*moo_attr_set)(const struct lu_env *env, struct md_object *obj,
 221                             const struct md_attr *attr);
 222
 223         int (*moo_xattr_get)(const struct lu_env *env, struct md_object *obj,
 224                              struct lu_buf *buf, const char *name);
 225
 226         int (*moo_xattr_list)(const struct lu_env *env, struct md_object *obj,
 227                               struct lu_buf *buf);
 228
 229         int (*moo_xattr_set)(const struct lu_env *env, struct md_object *obj,
 230                              const struct lu_buf *buf, const char *name,
 231                              int fl);
 232
 233         int (*moo_xattr_del)(const struct lu_env *env, struct md_object *obj,
 234                              const char *name);
 235
 236         /** This method is used to swap the layouts between 2 objects */
 237         int (*moo_swap_layouts)(const struct lu_env *env,
 238                                struct md_object *obj1, struct md_object *obj2,
 239                                __u64 flags);
 240
 241         /** \retval number of bytes actually read upon success */
 242         int (*moo_readpage)(const struct lu_env *env, struct md_object *obj,
 243                             const struct lu_rdpg *rdpg);
 244
 245         int (*moo_readlink)(const struct lu_env *env, struct md_object *obj,
 246                             struct lu_buf *buf);
 247         int (*moo_changelog)(const struct lu_env *env,
 248                              enum changelog_rec_type type, int flags,
 249                              struct md_object *obj);
 250         /** part of cross-ref operation */
 251         int (*moo_object_create)(const struct lu_env *env,
 252                                  struct md_object *obj,
 253                                  const struct md_op_spec *spec,
 254                                  struct md_attr *ma);
 255
 256         int (*moo_ref_add)(const struct lu_env *env,
 257                            struct md_object *obj,
 258                            const struct md_attr *ma);
 259
 260         int (*moo_ref_del)(const struct lu_env *env,
 261                            struct md_object *obj,
 262                            struct md_attr *ma);
 263
 264         int (*moo_open)(const struct lu_env *env,
 265                         struct md_object *obj, int flag);
 266
 267         int (*moo_close)(const struct lu_env *env, struct md_object *obj,
 268                          struct md_attr *ma, int mode);
 269
 270         int (*moo_capa_get)(const struct lu_env *, struct md_object *,
 271                             struct lustre_capa *, int renewal);
 272
 273         int (*moo_object_sync)(const struct lu_env *, struct md_object *);
 274
 275         int (*moo_file_lock)(const struct lu_env *env, struct md_object *obj,
 276                              struct lov_mds_md *lmm, struct ldlm_extent *extent,
 277                              struct lustre_handle *lockh);
 278         int (*moo_file_unlock)(const struct lu_env *env, struct md_object *obj,
 279                                struct lov_mds_md *lmm,
 280                                struct lustre_handle *lockh);
 281         int (*moo_object_lock)(const struct lu_env *env, struct md_object *obj,
 282                                struct lustre_handle *lh,
 283                                struct ldlm_enqueue_info *einfo,
 284                                void *policy);
 285 };
 286
 287 /**
 288  * Operations implemented for each directory object.
 289  */
 290 struct md_dir_operations {
 291         int (*mdo_is_subdir) (const struct lu_env *env, struct md_object *obj,
 292                               const struct lu_fid *fid, struct lu_fid *sfid);
 293
 294         int (*mdo_lookup)(const struct lu_env *env, struct md_object *obj,
 295                           const struct lu_name *lname, struct lu_fid *fid,
 296                           struct md_op_spec *spec);
 297
 298         mdl_mode_t (*mdo_lock_mode)(const struct lu_env *env,
 299                                     struct md_object *obj,
 300                                     mdl_mode_t mode);
 301
 302         int (*mdo_create)(const struct lu_env *env, struct md_object *pobj,
 303                           const struct lu_name *lname, struct md_object *child,
 304                           struct md_op_spec *spec,
 305                           struct md_attr *ma);
 306
 307         /** This method is used for creating data object for this meta object*/
 308         int (*mdo_create_data)(const struct lu_env *env, struct md_object *p,
 309                                struct md_object *o,
 310                                const struct md_op_spec *spec,
 311                                struct md_attr *ma);
 312
 313         int (*mdo_rename)(const struct lu_env *env, struct md_object *spobj,
 314                           struct md_object *tpobj, const struct lu_fid *lf,
 315                           const struct lu_name *lsname, struct md_object *tobj,
 316                           const struct lu_name *ltname, struct md_attr *ma);
 317
 318         int (*mdo_link)(const struct lu_env *env, struct md_object *tgt_obj,
 319                         struct md_object *src_obj, const struct lu_name *lname,
 320                         struct md_attr *ma);
 321
 322         int (*mdo_unlink)(const struct lu_env *env, struct md_object *pobj,
 323                           struct md_object *cobj, const struct lu_name *lname,
 324                           struct md_attr *ma, int no_name);
 325
 326         /** This method is used to compare a requested layout to an existing
 327          * layout (struct lov_mds_md_v1/3 vs struct lov_mds_md_v1/3) */
 328         int (*mdo_lum_lmm_cmp)(const struct lu_env *env,
 329                                struct md_object *cobj,
 330                                const struct md_op_spec *spec,
 331                                struct md_attr *ma);
 332
 333         /** partial ops for cross-ref case */
 334         int (*mdo_name_insert)(const struct lu_env *env,
 335                                struct md_object *obj,
 336                                const struct lu_name *lname,
 337                                const struct lu_fid *fid,
 338                                const struct md_attr *ma);
 339
 340         int (*mdo_name_remove)(const struct lu_env *env,
 341                                struct md_object *obj,
 342                                const struct lu_name *lname,
 343                                const struct md_attr *ma);
 344
 345         int (*mdo_rename_tgt)(const struct lu_env *env, struct md_object *pobj,
 346                               struct md_object *tobj, const struct lu_fid *fid,
 347                               const struct lu_name *lname, struct md_attr *ma);
 348 };
 349
 350 struct md_device_operations {
 351         /** meta-data device related handlers. */
 352         int (*mdo_root_get)(const struct lu_env *env, struct md_device *m,
 353                             struct lu_fid *f);
 354
 355         int (*mdo_maxeasize_get)(const struct lu_env *env, struct md_device *m,
 356                                 int *easize);
 357
 358         int (*mdo_statfs)(const struct lu_env *env, struct md_device *m,
 359                           struct obd_statfs *sfs);
 360
 361         int (*mdo_init_capa_ctxt)(const struct lu_env *env, struct md_device *m,
 362                                   int mode, unsigned long timeout, __u32 alg,
 363                                   struct lustre_capa_key *keys);
 364
 365         int (*mdo_update_capa_key)(const struct lu_env *env,
 366                                    struct md_device *m,
 367                                    struct lustre_capa_key *key);
 368
 369         int (*mdo_llog_ctxt_get)(const struct lu_env *env,
 370                                  struct md_device *m, int idx, void **h);
 371
 372         int (*mdo_iocontrol)(const struct lu_env *env, struct md_device *m,
 373                              unsigned int cmd, int len, void *data);
 374 };
 375
 376 enum md_upcall_event {
 377         /** Sync the md layer*/
 378         MD_LOV_SYNC = (1 << 0),
 379         /** Just for split, no need trans, for replay */
 380         MD_NO_TRANS = (1 << 1),
 381         MD_LOV_CONFIG = (1 << 2),
 382         /** Trigger quota recovery */
 383         MD_LOV_QUOTA = (1 << 3)
 384 };
 385
 386 struct md_upcall {
 387         /** this lock protects upcall using against its removal
 388          * read lock is for usage the upcall, write - for init/fini */
 389         struct rw_semaphore     mu_upcall_sem;
 390         /** device to call, upper layer normally */
 391         struct md_device       *mu_upcall_dev;
 392         /** upcall function */
 393         int (*mu_upcall)(const struct lu_env *env, struct md_device *md,
 394                          enum md_upcall_event ev, void *data);
 395 };
 396
 397 struct md_device {
 398         struct lu_device                   md_lu_dev;
 399         const struct md_device_operations *md_ops;
 400         struct md_upcall                   md_upcall;
 401 };
 402
 403 static inline void md_upcall_init(struct md_device *m, void *upcl)
 404 {
 405         init_rwsem(&m->md_upcall.mu_upcall_sem);
 406         m->md_upcall.mu_upcall_dev = NULL;
 407         m->md_upcall.mu_upcall = upcl;
 408 }
 409
 410 static inline void md_upcall_dev_set(struct md_device *m, struct md_device *up)
 411 {
 412         down_write(&m->md_upcall.mu_upcall_sem);
 413         m->md_upcall.mu_upcall_dev = up;
 414         up_write(&m->md_upcall.mu_upcall_sem);
 415 }
 416
 417 static inline void md_upcall_fini(struct md_device *m)
 418 {
 419         down_write(&m->md_upcall.mu_upcall_sem);
 420         m->md_upcall.mu_upcall_dev = NULL;
 421         m->md_upcall.mu_upcall = NULL;
 422         up_write(&m->md_upcall.mu_upcall_sem);
 423 }
 424
 425 static inline int md_do_upcall(const struct lu_env *env, struct md_device *m,
 426                                 enum md_upcall_event ev, void *data)
 427 {
 428         int rc = 0;
 429         down_read(&m->md_upcall.mu_upcall_sem);
 430         if (m->md_upcall.mu_upcall_dev != NULL &&
 431             m->md_upcall.mu_upcall_dev->md_upcall.mu_upcall != NULL) {
 432                 rc = m->md_upcall.mu_upcall_dev->md_upcall.mu_upcall(env,
 433                                               m->md_upcall.mu_upcall_dev,
 434                                               ev, data);
 435         }
 436         up_read(&m->md_upcall.mu_upcall_sem);
 437         return rc;
 438 }
 439
 440 struct md_object {
 441         struct lu_object                   mo_lu;
 442         const struct md_object_operations *mo_ops;
 443         const struct md_dir_operations    *mo_dir_ops;
 444 };
 445
 446 /**
 447  * seq-server site.
 448  */
 449 struct seq_server_site {
 450         struct lu_site       *ss_lu;
 451         /**
 452          * mds number of this site.
 453          */
 454         mdsno_t        ss_node_id;
 455         /**
 456          * Fid location database
 457          */
 458         struct lu_server_fld *ss_server_fld;
 459         struct lu_client_fld *ss_client_fld;
 460
 461         /**
 462          * Server Seq Manager
 463          */
 464         struct lu_server_seq *ss_server_seq;
 465
 466         /**
 467          * Controller Seq Manager
 468          */
 469         struct lu_server_seq *ss_control_seq;
 470         struct obd_export    *ss_control_exp;
 471
 472         /**
 473          * Client Seq Manager
 474          */
 475         struct lu_client_seq *ss_client_seq;
 476 };
 477
 478 static inline struct md_device *lu2md_dev(const struct lu_device *d)
 479 {
 480         LASSERT(IS_ERR(d) || lu_device_is_md(d));
 481         return container_of0(d, struct md_device, md_lu_dev);
 482 }
 483
 484 static inline struct lu_device *md2lu_dev(struct md_device *d)
 485 {
 486         return &d->md_lu_dev;
 487 }
 488
 489 static inline struct md_object *lu2md(const struct lu_object *o)
 490 {
 491         LASSERT(o == NULL || IS_ERR(o) || lu_device_is_md(o->lo_dev));
 492         return container_of0(o, struct md_object, mo_lu);
 493 }
 494
 495 static inline struct md_object *md_object_next(const struct md_object *obj)
 496 {
 497         return (obj ? lu2md(lu_object_next(&obj->mo_lu)) : NULL);
 498 }
 499
 500 static inline struct md_device *md_obj2dev(const struct md_object *o)
 501 {
 502         LASSERT(o == NULL || IS_ERR(o) || lu_device_is_md(o->mo_lu.lo_dev));
 503         return container_of0(o->mo_lu.lo_dev, struct md_device, md_lu_dev);
 504 }
 505
 506 static inline int md_device_init(struct md_device *md, struct lu_device_type *t)
 507 {
 508         return lu_device_init(&md->md_lu_dev, t);
 509 }
 510
 511 static inline void md_device_fini(struct md_device *md)
 512 {
 513         lu_device_fini(&md->md_lu_dev);
 514 }
 515
 516 static inline struct md_object *md_object_find_slice(const struct lu_env *env,
 517                                                      struct md_device *md,
 518                                                      const struct lu_fid *f)
 519 {
 520         return lu2md(lu_object_find_slice(env, md2lu_dev(md), f, NULL));
 521 }
 522
 523
 524 /** md operations */
 525 static inline int mo_permission(const struct lu_env *env,
 526                                 struct md_object *p,
 527                                 struct md_object *c,
 528                                 struct md_attr *at,
 529                                 int mask)
 530 {
 531         LASSERT(c->mo_ops->moo_permission);
 532         return c->mo_ops->moo_permission(env, p, c, at, mask);
 533 }
 534
 535 static inline int mo_attr_get(const struct lu_env *env,
 536                               struct md_object *m,
 537                               struct md_attr *at)
 538 {
 539         LASSERT(m->mo_ops->moo_attr_get);
 540         return m->mo_ops->moo_attr_get(env, m, at);
 541 }
 542
 543 static inline int mo_readlink(const struct lu_env *env,
 544                               struct md_object *m,
 545                               struct lu_buf *buf)
 546 {
 547         LASSERT(m->mo_ops->moo_readlink);
 548         return m->mo_ops->moo_readlink(env, m, buf);
 549 }
 550
 551 static inline int mo_changelog(const struct lu_env *env,
 552                                enum changelog_rec_type type,
 553                                int flags, struct md_object *m)
 554 {
 555         LASSERT(m->mo_ops->moo_changelog);
 556         return m->mo_ops->moo_changelog(env, type, flags, m);
 557 }
 558
 559 static inline int mo_attr_set(const struct lu_env *env,
 560                               struct md_object *m,
 561                               const struct md_attr *at)
 562 {
 563         LASSERT(m->mo_ops->moo_attr_set);
 564         return m->mo_ops->moo_attr_set(env, m, at);
 565 }
 566
 567 static inline int mo_xattr_get(const struct lu_env *env,
 568                                struct md_object *m,
 569                                struct lu_buf *buf,
 570                                const char *name)
 571 {
 572         LASSERT(m->mo_ops->moo_xattr_get);
 573         return m->mo_ops->moo_xattr_get(env, m, buf, name);
 574 }
 575
 576 static inline int mo_xattr_del(const struct lu_env *env,
 577                                struct md_object *m,
 578                                const char *name)
 579 {
 580         LASSERT(m->mo_ops->moo_xattr_del);
 581         return m->mo_ops->moo_xattr_del(env, m, name);
 582 }
 583
 584 static inline int mo_xattr_set(const struct lu_env *env,
 585                                struct md_object *m,
 586                                const struct lu_buf *buf,
 587                                const char *name,
 588                                int flags)
 589 {
 590         LASSERT(m->mo_ops->moo_xattr_set);
 591         return m->mo_ops->moo_xattr_set(env, m, buf, name, flags);
 592 }
 593
 594 static inline int mo_xattr_list(const struct lu_env *env,
 595                                 struct md_object *m,
 596                                 struct lu_buf *buf)
 597 {
 598         LASSERT(m->mo_ops->moo_xattr_list);
 599         return m->mo_ops->moo_xattr_list(env, m, buf);
 600 }
 601
 602 static inline int mo_swap_layouts(const struct lu_env *env,
 603                                   struct md_object *o1,
 604                                   struct md_object *o2, __u64 flags)
 605 {
 606         LASSERT(o1->mo_ops->moo_swap_layouts);
 607         LASSERT(o2->mo_ops->moo_swap_layouts);
 608         if (o1->mo_ops->moo_swap_layouts != o2->mo_ops->moo_swap_layouts)
 609                 return -EPERM;
 610         return o1->mo_ops->moo_swap_layouts(env, o1, o2, flags);
 611 }
 612
 613 static inline int mo_open(const struct lu_env *env,
 614                           struct md_object *m,
 615                           int flags)
 616 {
 617         LASSERT(m->mo_ops->moo_open);
 618         return m->mo_ops->moo_open(env, m, flags);
 619 }
 620
 621 static inline int mo_close(const struct lu_env *env,
 622                            struct md_object *m,
 623                            struct md_attr *ma,
 624                            int mode)
 625 {
 626         LASSERT(m->mo_ops->moo_close);
 627         return m->mo_ops->moo_close(env, m, ma, mode);
 628 }
 629
 630 static inline int mo_readpage(const struct lu_env *env,
 631                               struct md_object *m,
 632                               const struct lu_rdpg *rdpg)
 633 {
 634         LASSERT(m->mo_ops->moo_readpage);
 635         return m->mo_ops->moo_readpage(env, m, rdpg);
 636 }
 637
 638 static inline int mo_object_create(const struct lu_env *env,
 639                                    struct md_object *m,
 640                                    const struct md_op_spec *spc,
 641                                    struct md_attr *at)
 642 {
 643         LASSERT(m->mo_ops->moo_object_create);
 644         return m->mo_ops->moo_object_create(env, m, spc, at);
 645 }
 646
 647 static inline int mo_ref_add(const struct lu_env *env,
 648                              struct md_object *m,
 649                              const struct md_attr *ma)
 650 {
 651         LASSERT(m->mo_ops->moo_ref_add);
 652         return m->mo_ops->moo_ref_add(env, m, ma);
 653 }
 654
 655 static inline int mo_ref_del(const struct lu_env *env,
 656                              struct md_object *m,
 657                              struct md_attr *ma)
 658 {
 659         LASSERT(m->mo_ops->moo_ref_del);
 660         return m->mo_ops->moo_ref_del(env, m, ma);
 661 }
 662
 663 static inline int mo_capa_get(const struct lu_env *env,
 664                               struct md_object *m,
 665                               struct lustre_capa *c,
 666                               int renewal)
 667 {
 668         LASSERT(m->mo_ops->moo_capa_get);
 669         return m->mo_ops->moo_capa_get(env, m, c, renewal);
 670 }
 671
 672 static inline int mo_object_sync(const struct lu_env *env, struct md_object *m)
 673 {
 674         LASSERT(m->mo_ops->moo_object_sync);
 675         return m->mo_ops->moo_object_sync(env, m);
 676 }
 677
 678 static inline int mo_file_lock(const struct lu_env *env, struct md_object *m,
 679                                struct lov_mds_md *lmm,
 680                                struct ldlm_extent *extent,
 681                                struct lustre_handle *lockh)
 682 {
 683         LASSERT(m->mo_ops->moo_file_lock);
 684         return m->mo_ops->moo_file_lock(env, m, lmm, extent, lockh);
 685 }
 686
 687 static inline int mo_file_unlock(const struct lu_env *env, struct md_object *m,
 688                                  struct lov_mds_md *lmm,
 689                                  struct lustre_handle *lockh)
 690 {
 691         LASSERT(m->mo_ops->moo_file_unlock);
 692         return m->mo_ops->moo_file_unlock(env, m, lmm, lockh);
 693 }
 694
 695 static inline int mo_object_lock(const struct lu_env *env,
 696                                  struct md_object *m,
 697                                  struct lustre_handle *lh,
 698                                  struct ldlm_enqueue_info *einfo,
 699                                  void *policy)
 700 {
 701         LASSERT(m->mo_ops->moo_object_lock);
 702         return m->mo_ops->moo_object_lock(env, m, lh, einfo, policy);
 703 }
 704
 705 static inline int mdo_lookup(const struct lu_env *env,
 706                              struct md_object *p,
 707                              const struct lu_name *lname,
 708                              struct lu_fid *f,
 709                              struct md_op_spec *spec)
 710 {
 711         LASSERT(p->mo_dir_ops->mdo_lookup);
 712         return p->mo_dir_ops->mdo_lookup(env, p, lname, f, spec);
 713 }
 714
 715 static inline mdl_mode_t mdo_lock_mode(const struct lu_env *env,
 716                                        struct md_object *mo,
 717                                        mdl_mode_t lm)
 718 {
 719         if (mo->mo_dir_ops->mdo_lock_mode == NULL)
 720                 return MDL_MINMODE;
 721         return mo->mo_dir_ops->mdo_lock_mode(env, mo, lm);
 722 }
 723
 724 static inline int mdo_create(const struct lu_env *env,
 725                              struct md_object *p,
 726                              const struct lu_name *lchild_name,
 727                              struct md_object *c,
 728                              struct md_op_spec *spc,
 729                              struct md_attr *at)
 730 {
 731         LASSERT(p->mo_dir_ops->mdo_create);
 732         return p->mo_dir_ops->mdo_create(env, p, lchild_name, c, spc, at);
 733 }
 734
 735 static inline int mdo_create_data(const struct lu_env *env,
 736                                   struct md_object *p,
 737                                   struct md_object *c,
 738                                   const struct md_op_spec *spec,
 739                                   struct md_attr *ma)
 740 {
 741         LASSERT(c->mo_dir_ops->mdo_create_data);
 742         return c->mo_dir_ops->mdo_create_data(env, p, c, spec, ma);
 743 }
 744
 745 static inline int mdo_rename(const struct lu_env *env,
 746                              struct md_object *sp,
 747                              struct md_object *tp,
 748                              const struct lu_fid *lf,
 749                              const struct lu_name *lsname,
 750                              struct md_object *t,
 751                              const struct lu_name *ltname,
 752                              struct md_attr *ma)
 753 {
 754         LASSERT(tp->mo_dir_ops->mdo_rename);
 755         return tp->mo_dir_ops->mdo_rename(env, sp, tp, lf, lsname, t, ltname,
 756                                           ma);
 757 }
 758
 759 static inline int mdo_is_subdir(const struct lu_env *env,
 760                                 struct md_object *mo,
 761                                 const struct lu_fid *fid,
 762                                 struct lu_fid *sfid)
 763 {
 764         LASSERT(mo->mo_dir_ops->mdo_is_subdir);
 765         return mo->mo_dir_ops->mdo_is_subdir(env, mo, fid, sfid);
 766 }
 767
 768 static inline int mdo_link(const struct lu_env *env,
 769                            struct md_object *p,
 770                            struct md_object *s,
 771                            const struct lu_name *lname,
 772                            struct md_attr *ma)
 773 {
 774         LASSERT(s->mo_dir_ops->mdo_link);
 775         return s->mo_dir_ops->mdo_link(env, p, s, lname, ma);
 776 }
 777
 778 static inline int mdo_unlink(const struct lu_env *env,
 779                              struct md_object *p,
 780                              struct md_object *c,
 781                              const struct lu_name *lname,
 782                              struct md_attr *ma, int no_name)
 783 {
 784         LASSERT(p->mo_dir_ops->mdo_unlink);
 785         return p->mo_dir_ops->mdo_unlink(env, p, c, lname, ma, no_name);
 786 }
 787
 788 static inline int mdo_lum_lmm_cmp(const struct lu_env *env,
 789                                   struct md_object *c,
 790                                   const struct md_op_spec *spec,
 791                                   struct md_attr *ma)
 792 {
 793         LASSERT(c->mo_dir_ops->mdo_lum_lmm_cmp);
 794         return c->mo_dir_ops->mdo_lum_lmm_cmp(env, c, spec, ma);
 795 }
 796
 797 static inline int mdo_name_insert(const struct lu_env *env,
 798                                   struct md_object *p,
 799                                   const struct lu_name *lname,
 800                                   const struct lu_fid *f,
 801                                   const struct md_attr *ma)
 802 {
 803         LASSERT(p->mo_dir_ops->mdo_name_insert);
 804         return p->mo_dir_ops->mdo_name_insert(env, p, lname, f, ma);
 805 }
 806
 807 static inline int mdo_name_remove(const struct lu_env *env,
 808                                   struct md_object *p,
 809                                   const struct lu_name *lname,
 810                                   const struct md_attr *ma)
 811 {
 812         LASSERT(p->mo_dir_ops->mdo_name_remove);
 813         return p->mo_dir_ops->mdo_name_remove(env, p, lname, ma);
 814 }
 815
 816 static inline int mdo_rename_tgt(const struct lu_env *env,
 817                                  struct md_object *p,
 818                                  struct md_object *t,
 819                                  const struct lu_fid *lf,
 820                                  const struct lu_name *lname,
 821                                  struct md_attr *ma)
 822 {
 823         if (t) {
 824                 LASSERT(t->mo_dir_ops->mdo_rename_tgt);
 825                 return t->mo_dir_ops->mdo_rename_tgt(env, p, t, lf, lname, ma);
 826         } else {
 827                 LASSERT(p->mo_dir_ops->mdo_rename_tgt);
 828                 return p->mo_dir_ops->mdo_rename_tgt(env, p, t, lf, lname, ma);
 829         }
 830 }
 831
 832 /**
 833  * Used in MDD/OUT layer for object lock rule
 834  **/
 835 enum mdd_object_role {
 836         MOR_SRC_PARENT,
 837         MOR_SRC_CHILD,
 838         MOR_TGT_PARENT,
 839         MOR_TGT_CHILD,
 840         MOR_TGT_ORPHAN
 841 };
 842
 843 struct dt_device;
 844 /**
 845  * Structure to hold object information. This is used to create object
 846  * \pre llod_dir exist
 847  */
 848 struct lu_local_obj_desc {
 849         const char                    *llod_dir;
 850         const char                    *llod_name;
 851         __u32                       llod_oid;
 852         int                           llod_is_index;
 853         const struct dt_index_features  *llod_feat;
 854         struct list_head                       llod_linkage;
 855 };
 856
 857 int lustre_buf2som(void *buf, int rc, struct md_som_data *msd);
 858 int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh);
 859 void lustre_hsm2buf(void *buf, struct md_hsm *mh);
 860
 861 struct lu_ucred {
 862         __u32          uc_valid;
 863         __u32          uc_o_uid;
 864         __u32          uc_o_gid;
 865         __u32          uc_o_fsuid;
 866         __u32          uc_o_fsgid;
 867         __u32          uc_uid;
 868         __u32          uc_gid;
 869         __u32          uc_fsuid;
 870         __u32          uc_fsgid;
 871         __u32          uc_suppgids[2];
 872         cfs_cap_t          uc_cap;
 873         __u32          uc_umask;
 874         struct group_info *uc_ginfo;
 875         struct md_identity *uc_identity;
 876 };
 877
 878 struct lu_ucred *lu_ucred(const struct lu_env *env);
 879
 880 struct lu_ucred *lu_ucred_check(const struct lu_env *env);
 881
 882 struct lu_ucred *lu_ucred_assert(const struct lu_env *env);
 883
 884 int lu_ucred_global_init(void);
 885
 886 void lu_ucred_global_fini(void);
 887
 888 #define md_cap_t(x) (x)
 889
 890 #define MD_CAP_TO_MASK(x) (1 << (x))
 891
 892 #define md_cap_raised(c, flag) (md_cap_t(c) & MD_CAP_TO_MASK(flag))
 893
 894 /* capable() is copied from linux kernel! */
 895 static inline int md_capable(struct lu_ucred *uc, cfs_cap_t cap)
 896 {
 897         if (md_cap_raised(uc->uc_cap, cap))
 898                 return 1;
 899         return 0;
 900 }
 901
 902 /** @} md */
 903 #endif /* _LINUX_MD_OBJECT_H */