4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/include/md_object.h
38 * Extention of lu_object.h for metadata objects
41 #ifndef _LUSTRE_MD_OBJECT_H
42 #define _LUSTRE_MD_OBJECT_H
45 * Sub-class of lu_object with methods common for "meta-data" objects in MDT
48 * Meta-data objects implement namespace operations: you can link, unlink
49 * them, and treat them as directories.
51 * Examples: mdt, cmm, and mdt are implementations of md interface.
57 * super-class definitions.
59 #include <dt_object.h>
62 struct md_device_operations;
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() */
82 struct lu_fid mc_fid[MD_CAPAINFO_MAX];
83 struct lustre_capa *mc_capa[MD_CAPAINFO_MAX];
87 struct obd_export *mq_exp;
91 * Implemented in mdd/mdd_handler.c.
93 * XXX should be moved into separate .h/.c together with all md security
94 * related definitions.
96 struct md_capainfo *md_capainfo(const struct lu_env *env);
97 struct md_quota *md_quota(const struct lu_env *env);
99 /** metadata attributes */
103 MA_COOKIE = (1 << 2),
106 MA_ACL_DEF = (1 << 5),
107 MA_LOV_DEF = (1 << 6),
108 MA_LAY_GEN = (1 << 7),
128 MDT_REG_LOCK = (1 << 0),
129 MDT_PDO_LOCK = (1 << 1)
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
143 #define IOEPOCH_INVAL 0
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
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;
168 struct llog_cookie *ma_cookie;
169 struct lustre_capa *ma_capa;
170 struct md_som_data *ma_som;
178 /** Additional parameters for create */
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 */
187 /** lov objs exist already */
188 const struct lu_fid *fid;
194 /** Create flag from client: such as MDS_OPEN_CREAT, and others. */
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 */
202 /** Current lock mode for parent dir where create is performing. */
203 mdl_mode_t sp_cr_mode;
205 /** to create directory */
206 const struct dt_index_features *sp_feat;
210 * Operations implemented for each md object (both directory and leaf).
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);
217 int (*moo_attr_get)(const struct lu_env *env, struct md_object *obj,
218 struct md_attr *attr);
220 int (*moo_attr_set)(const struct lu_env *env, struct md_object *obj,
221 const struct md_attr *attr);
223 int (*moo_xattr_get)(const struct lu_env *env, struct md_object *obj,
224 struct lu_buf *buf, const char *name);
226 int (*moo_xattr_list)(const struct lu_env *env, struct md_object *obj,
229 int (*moo_xattr_set)(const struct lu_env *env, struct md_object *obj,
230 const struct lu_buf *buf, const char *name,
233 int (*moo_xattr_del)(const struct lu_env *env, struct md_object *obj,
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,
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);
245 int (*moo_readlink)(const struct lu_env *env, struct md_object *obj,
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,
256 int (*moo_ref_add)(const struct lu_env *env,
257 struct md_object *obj,
258 const struct md_attr *ma);
260 int (*moo_ref_del)(const struct lu_env *env,
261 struct md_object *obj,
264 int (*moo_open)(const struct lu_env *env,
265 struct md_object *obj, int flag);
267 int (*moo_close)(const struct lu_env *env, struct md_object *obj,
268 struct md_attr *ma, int mode);
270 int (*moo_capa_get)(const struct lu_env *, struct md_object *,
271 struct lustre_capa *, int renewal);
273 int (*moo_object_sync)(const struct lu_env *, struct md_object *);
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,
288 * Operations implemented for each directory object.
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);
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);
298 mdl_mode_t (*mdo_lock_mode)(const struct lu_env *env,
299 struct md_object *obj,
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,
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,
310 const struct md_op_spec *spec,
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);
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,
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);
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,
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);
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);
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);
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,
355 int (*mdo_maxsize_get)(const struct lu_env *env, struct md_device *m,
356 int *md_size, int *cookie_size);
358 int (*mdo_statfs)(const struct lu_env *env, struct md_device *m,
359 struct obd_statfs *sfs);
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);
365 int (*mdo_update_capa_key)(const struct lu_env *env,
367 struct lustre_capa_key *key);
369 int (*mdo_llog_ctxt_get)(const struct lu_env *env,
370 struct md_device *m, int idx, void **h);
372 int (*mdo_iocontrol)(const struct lu_env *env, struct md_device *m,
373 unsigned int cmd, int len, void *data);
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)
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);
398 struct lu_device md_lu_dev;
399 const struct md_device_operations *md_ops;
400 struct md_upcall md_upcall;
403 static inline void md_upcall_init(struct md_device *m, void *upcl)
405 init_rwsem(&m->md_upcall.mu_upcall_sem);
406 m->md_upcall.mu_upcall_dev = NULL;
407 m->md_upcall.mu_upcall = upcl;
410 static inline void md_upcall_dev_set(struct md_device *m, struct md_device *up)
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);
417 static inline void md_upcall_fini(struct md_device *m)
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);
425 static inline int md_do_upcall(const struct lu_env *env, struct md_device *m,
426 enum md_upcall_event ev, void *data)
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,
436 up_read(&m->md_upcall.mu_upcall_sem);
441 struct lu_object mo_lu;
442 const struct md_object_operations *mo_ops;
443 const struct md_dir_operations *mo_dir_ops;
449 struct seq_server_site {
450 struct lu_site *ss_lu;
452 * mds number of this site.
456 * Fid location database
458 struct lu_server_fld *ss_server_fld;
459 struct lu_client_fld *ss_client_fld;
464 struct lu_server_seq *ss_server_seq;
467 * Controller Seq Manager
469 struct lu_server_seq *ss_control_seq;
470 struct obd_export *ss_control_exp;
475 struct lu_client_seq *ss_client_seq;
478 static inline struct md_device *lu2md_dev(const struct lu_device *d)
480 LASSERT(IS_ERR(d) || lu_device_is_md(d));
481 return container_of0(d, struct md_device, md_lu_dev);
484 static inline struct lu_device *md2lu_dev(struct md_device *d)
486 return &d->md_lu_dev;
489 static inline struct md_object *lu2md(const struct lu_object *o)
491 LASSERT(o == NULL || IS_ERR(o) || lu_device_is_md(o->lo_dev));
492 return container_of0(o, struct md_object, mo_lu);
495 static inline struct md_object *md_object_next(const struct md_object *obj)
497 return (obj ? lu2md(lu_object_next(&obj->mo_lu)) : NULL);
500 static inline struct md_device *md_obj2dev(const struct md_object *o)
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);
506 static inline struct seq_server_site *lu_site2seq(const struct lu_site *s)
508 return s->ld_seq_site;
511 static inline int md_device_init(struct md_device *md, struct lu_device_type *t)
513 return lu_device_init(&md->md_lu_dev, t);
516 static inline void md_device_fini(struct md_device *md)
518 lu_device_fini(&md->md_lu_dev);
521 static inline struct md_object *md_object_find_slice(const struct lu_env *env,
522 struct md_device *md,
523 const struct lu_fid *f)
525 return lu2md(lu_object_find_slice(env, md2lu_dev(md), f, NULL));
530 static inline int mo_permission(const struct lu_env *env,
536 LASSERT(c->mo_ops->moo_permission);
537 return c->mo_ops->moo_permission(env, p, c, at, mask);
540 static inline int mo_attr_get(const struct lu_env *env,
544 LASSERT(m->mo_ops->moo_attr_get);
545 return m->mo_ops->moo_attr_get(env, m, at);
548 static inline int mo_readlink(const struct lu_env *env,
552 LASSERT(m->mo_ops->moo_readlink);
553 return m->mo_ops->moo_readlink(env, m, buf);
556 static inline int mo_changelog(const struct lu_env *env,
557 enum changelog_rec_type type,
558 int flags, struct md_object *m)
560 LASSERT(m->mo_ops->moo_changelog);
561 return m->mo_ops->moo_changelog(env, type, flags, m);
564 static inline int mo_attr_set(const struct lu_env *env,
566 const struct md_attr *at)
568 LASSERT(m->mo_ops->moo_attr_set);
569 return m->mo_ops->moo_attr_set(env, m, at);
572 static inline int mo_xattr_get(const struct lu_env *env,
577 LASSERT(m->mo_ops->moo_xattr_get);
578 return m->mo_ops->moo_xattr_get(env, m, buf, name);
581 static inline int mo_xattr_del(const struct lu_env *env,
585 LASSERT(m->mo_ops->moo_xattr_del);
586 return m->mo_ops->moo_xattr_del(env, m, name);
589 static inline int mo_xattr_set(const struct lu_env *env,
591 const struct lu_buf *buf,
595 LASSERT(m->mo_ops->moo_xattr_set);
596 return m->mo_ops->moo_xattr_set(env, m, buf, name, flags);
599 static inline int mo_xattr_list(const struct lu_env *env,
603 LASSERT(m->mo_ops->moo_xattr_list);
604 return m->mo_ops->moo_xattr_list(env, m, buf);
607 static inline int mo_swap_layouts(const struct lu_env *env,
608 struct md_object *o1,
609 struct md_object *o2, __u64 flags)
611 LASSERT(o1->mo_ops->moo_swap_layouts);
612 LASSERT(o2->mo_ops->moo_swap_layouts);
613 if (o1->mo_ops->moo_swap_layouts != o2->mo_ops->moo_swap_layouts)
615 return o1->mo_ops->moo_swap_layouts(env, o1, o2, flags);
618 static inline int mo_open(const struct lu_env *env,
622 LASSERT(m->mo_ops->moo_open);
623 return m->mo_ops->moo_open(env, m, flags);
626 static inline int mo_close(const struct lu_env *env,
631 LASSERT(m->mo_ops->moo_close);
632 return m->mo_ops->moo_close(env, m, ma, mode);
635 static inline int mo_readpage(const struct lu_env *env,
637 const struct lu_rdpg *rdpg)
639 LASSERT(m->mo_ops->moo_readpage);
640 return m->mo_ops->moo_readpage(env, m, rdpg);
643 static inline int mo_object_create(const struct lu_env *env,
645 const struct md_op_spec *spc,
648 LASSERT(m->mo_ops->moo_object_create);
649 return m->mo_ops->moo_object_create(env, m, spc, at);
652 static inline int mo_ref_add(const struct lu_env *env,
654 const struct md_attr *ma)
656 LASSERT(m->mo_ops->moo_ref_add);
657 return m->mo_ops->moo_ref_add(env, m, ma);
660 static inline int mo_ref_del(const struct lu_env *env,
664 LASSERT(m->mo_ops->moo_ref_del);
665 return m->mo_ops->moo_ref_del(env, m, ma);
668 static inline int mo_capa_get(const struct lu_env *env,
670 struct lustre_capa *c,
673 LASSERT(m->mo_ops->moo_capa_get);
674 return m->mo_ops->moo_capa_get(env, m, c, renewal);
677 static inline int mo_object_sync(const struct lu_env *env, struct md_object *m)
679 LASSERT(m->mo_ops->moo_object_sync);
680 return m->mo_ops->moo_object_sync(env, m);
683 static inline int mo_file_lock(const struct lu_env *env, struct md_object *m,
684 struct lov_mds_md *lmm,
685 struct ldlm_extent *extent,
686 struct lustre_handle *lockh)
688 LASSERT(m->mo_ops->moo_file_lock);
689 return m->mo_ops->moo_file_lock(env, m, lmm, extent, lockh);
692 static inline int mo_file_unlock(const struct lu_env *env, struct md_object *m,
693 struct lov_mds_md *lmm,
694 struct lustre_handle *lockh)
696 LASSERT(m->mo_ops->moo_file_unlock);
697 return m->mo_ops->moo_file_unlock(env, m, lmm, lockh);
700 static inline int mo_object_lock(const struct lu_env *env,
702 struct lustre_handle *lh,
703 struct ldlm_enqueue_info *einfo,
706 LASSERT(m->mo_ops->moo_object_lock);
707 return m->mo_ops->moo_object_lock(env, m, lh, einfo, policy);
710 static inline int mdo_lookup(const struct lu_env *env,
712 const struct lu_name *lname,
714 struct md_op_spec *spec)
716 LASSERT(p->mo_dir_ops->mdo_lookup);
717 return p->mo_dir_ops->mdo_lookup(env, p, lname, f, spec);
720 static inline mdl_mode_t mdo_lock_mode(const struct lu_env *env,
721 struct md_object *mo,
724 if (mo->mo_dir_ops->mdo_lock_mode == NULL)
726 return mo->mo_dir_ops->mdo_lock_mode(env, mo, lm);
729 static inline int mdo_create(const struct lu_env *env,
731 const struct lu_name *lchild_name,
733 struct md_op_spec *spc,
736 LASSERT(p->mo_dir_ops->mdo_create);
737 return p->mo_dir_ops->mdo_create(env, p, lchild_name, c, spc, at);
740 static inline int mdo_create_data(const struct lu_env *env,
743 const struct md_op_spec *spec,
746 LASSERT(c->mo_dir_ops->mdo_create_data);
747 return c->mo_dir_ops->mdo_create_data(env, p, c, spec, ma);
750 static inline int mdo_rename(const struct lu_env *env,
751 struct md_object *sp,
752 struct md_object *tp,
753 const struct lu_fid *lf,
754 const struct lu_name *lsname,
756 const struct lu_name *ltname,
759 LASSERT(tp->mo_dir_ops->mdo_rename);
760 return tp->mo_dir_ops->mdo_rename(env, sp, tp, lf, lsname, t, ltname,
764 static inline int mdo_is_subdir(const struct lu_env *env,
765 struct md_object *mo,
766 const struct lu_fid *fid,
769 LASSERT(mo->mo_dir_ops->mdo_is_subdir);
770 return mo->mo_dir_ops->mdo_is_subdir(env, mo, fid, sfid);
773 static inline int mdo_link(const struct lu_env *env,
776 const struct lu_name *lname,
779 LASSERT(s->mo_dir_ops->mdo_link);
780 return s->mo_dir_ops->mdo_link(env, p, s, lname, ma);
783 static inline int mdo_unlink(const struct lu_env *env,
786 const struct lu_name *lname,
787 struct md_attr *ma, int no_name)
789 LASSERT(p->mo_dir_ops->mdo_unlink);
790 return p->mo_dir_ops->mdo_unlink(env, p, c, lname, ma, no_name);
793 static inline int mdo_lum_lmm_cmp(const struct lu_env *env,
795 const struct md_op_spec *spec,
798 LASSERT(c->mo_dir_ops->mdo_lum_lmm_cmp);
799 return c->mo_dir_ops->mdo_lum_lmm_cmp(env, c, spec, ma);
802 static inline int mdo_name_insert(const struct lu_env *env,
804 const struct lu_name *lname,
805 const struct lu_fid *f,
806 const struct md_attr *ma)
808 LASSERT(p->mo_dir_ops->mdo_name_insert);
809 return p->mo_dir_ops->mdo_name_insert(env, p, lname, f, ma);
812 static inline int mdo_name_remove(const struct lu_env *env,
814 const struct lu_name *lname,
815 const struct md_attr *ma)
817 LASSERT(p->mo_dir_ops->mdo_name_remove);
818 return p->mo_dir_ops->mdo_name_remove(env, p, lname, ma);
821 static inline int mdo_rename_tgt(const struct lu_env *env,
824 const struct lu_fid *lf,
825 const struct lu_name *lname,
829 LASSERT(t->mo_dir_ops->mdo_rename_tgt);
830 return t->mo_dir_ops->mdo_rename_tgt(env, p, t, lf, lname, ma);
832 LASSERT(p->mo_dir_ops->mdo_rename_tgt);
833 return p->mo_dir_ops->mdo_rename_tgt(env, p, t, lf, lname, ma);
838 * Used in MDD/OUT layer for object lock rule
840 enum mdd_object_role {
850 * Structure to hold object information. This is used to create object
851 * \pre llod_dir exist
853 struct lu_local_obj_desc {
854 const char *llod_dir;
855 const char *llod_name;
858 const struct dt_index_features *llod_feat;
859 cfs_list_t llod_linkage;
862 struct md_object *llo_store_resolve(const struct lu_env *env,
863 struct md_device *md,
864 struct dt_device *dt,
868 struct md_object *llo_store_open(const struct lu_env *env,
869 struct md_device *md,
870 struct dt_device *dt,
875 struct md_object *llo_store_create_index(const struct lu_env *env,
876 struct md_device *md,
877 struct dt_device *dt,
880 const struct lu_fid *fid,
881 const struct dt_index_features *feat);
883 struct md_object *llo_store_create(const struct lu_env *env,
884 struct md_device *md,
885 struct dt_device *dt,
888 const struct lu_fid *fid);
890 void llo_local_obj_register(struct lu_local_obj_desc *);
891 void llo_local_obj_unregister(struct lu_local_obj_desc *);
893 int llo_local_objects_setup(const struct lu_env *env,
894 struct md_device * md,
895 struct dt_device * dt);
897 int llo_global_init(void);
898 void llo_global_fini(void);
900 int lustre_buf2som(void *buf, int rc, struct md_som_data *msd);
901 int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh);
902 void lustre_hsm2buf(void *buf, struct md_hsm *mh);
914 __u32 uc_suppgids[2];
917 cfs_group_info_t *uc_ginfo;
918 struct md_identity *uc_identity;
921 struct lu_ucred *lu_ucred(const struct lu_env *env);
923 struct lu_ucred *lu_ucred_check(const struct lu_env *env);
925 struct lu_ucred *lu_ucred_assert(const struct lu_env *env);
927 int lu_ucred_global_init(void);
929 void lu_ucred_global_fini(void);
931 #define md_cap_t(x) (x)
933 #define MD_CAP_TO_MASK(x) (1 << (x))
935 #define md_cap_raised(c, flag) (md_cap_t(c) & MD_CAP_TO_MASK(flag))
937 /* capable() is copied from linux kernel! */
938 static inline int md_capable(struct lu_ucred *uc, cfs_cap_t cap)
940 if (md_cap_raised(uc->uc_cap, cap))
946 #endif /* _LINUX_MD_OBJECT_H */