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, 2014, 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
44 #ifndef HAVE_SERVER_SUPPORT
45 # error "client code should not depend on md_object.h"
46 #endif /* !HAVE_SERVER_SUPPORT */
49 * Sub-class of lu_object with methods common for "meta-data" objects in MDT
52 * Meta-data objects implement namespace operations: you can link, unlink
53 * them, and treat them as directories.
55 * Examples: mdt, cmm, and mdt are implementations of md interface.
61 * super-class definitions.
63 #include <dt_object.h>
66 struct md_device_operations;
70 /** metadata attributes */
77 MA_ACL_DEF = (1 << 5),
78 MA_LOV_DEF = (1 << 6),
81 MA_LMV_DEF = (1 << 9),
98 MDT_REG_LOCK = (1 << 0),
99 MDT_PDO_LOCK = (1 << 1)
102 /* memory structure for hsm attributes
103 * for fields description see the on disk structure hsm_attrs
104 * which is defined in lustre_idl.h
117 struct lu_attr ma_attr;
118 struct lu_fid ma_pfid;
119 struct md_hsm ma_hsm;
120 struct lov_mds_md *ma_lmm;
121 union lmv_mds_md *ma_lmv;
128 /** Additional parameters for create */
131 /** symlink target */
132 const char *sp_symname;
133 /** eadata for regular files */
140 /** Create flag from client: such as MDS_OPEN_CREAT, and others. */
143 /** don't create lov objects or llog cookie - this replay */
144 unsigned int no_create:1,
145 sp_cr_lookup:1, /* do lookup sanity check or not. */
146 sp_rm_entry:1, /* only remove name entry */
147 sp_permitted:1; /* do not check permission */
149 /** Current lock mode for parent dir where create is performing. */
150 mdl_mode_t sp_cr_mode;
152 /** to create directory */
153 const struct dt_index_features *sp_feat;
156 union ldlm_policy_data;
158 * Operations implemented for each md object (both directory and leaf).
160 struct md_object_operations {
161 int (*moo_permission)(const struct lu_env *env,
162 struct md_object *pobj, struct md_object *cobj,
163 struct md_attr *attr, int mask);
165 int (*moo_attr_get)(const struct lu_env *env, struct md_object *obj,
166 struct md_attr *attr);
168 int (*moo_attr_set)(const struct lu_env *env, struct md_object *obj,
169 const struct md_attr *attr);
171 int (*moo_xattr_get)(const struct lu_env *env, struct md_object *obj,
172 struct lu_buf *buf, const char *name);
174 int (*moo_xattr_list)(const struct lu_env *env, struct md_object *obj,
177 int (*moo_xattr_set)(const struct lu_env *env, struct md_object *obj,
178 const struct lu_buf *buf, const char *name,
181 int (*moo_xattr_del)(const struct lu_env *env, struct md_object *obj,
184 /** This method is used to swap the layouts between 2 objects */
185 int (*moo_swap_layouts)(const struct lu_env *env,
186 struct md_object *obj1, struct md_object *obj2,
189 /** \retval number of bytes actually read upon success */
190 int (*moo_readpage)(const struct lu_env *env, struct md_object *obj,
191 const struct lu_rdpg *rdpg);
193 int (*moo_readlink)(const struct lu_env *env, struct md_object *obj,
195 int (*moo_changelog)(const struct lu_env *env,
196 enum changelog_rec_type type, int flags,
197 struct md_object *obj);
199 int (*moo_open)(const struct lu_env *env,
200 struct md_object *obj, int flag);
202 int (*moo_close)(const struct lu_env *env, struct md_object *obj,
203 struct md_attr *ma, int mode);
205 int (*moo_object_sync)(const struct lu_env *, struct md_object *);
207 int (*moo_object_lock)(const struct lu_env *env, struct md_object *obj,
208 struct lustre_handle *lh,
209 struct ldlm_enqueue_info *einfo,
210 union ldlm_policy_data *policy);
211 int (*moo_object_unlock)(const struct lu_env *env,
212 struct md_object *obj,
213 struct ldlm_enqueue_info *einfo,
214 union ldlm_policy_data *policy);
218 * Operations implemented for each directory object.
220 struct md_dir_operations {
221 int (*mdo_is_subdir) (const struct lu_env *env, struct md_object *obj,
222 const struct lu_fid *fid, struct lu_fid *sfid);
224 int (*mdo_lookup)(const struct lu_env *env, struct md_object *obj,
225 const struct lu_name *lname, struct lu_fid *fid,
226 struct md_op_spec *spec);
228 mdl_mode_t (*mdo_lock_mode)(const struct lu_env *env,
229 struct md_object *obj,
232 int (*mdo_create)(const struct lu_env *env, struct md_object *pobj,
233 const struct lu_name *lname, struct md_object *child,
234 struct md_op_spec *spec,
237 /** This method is used for creating data object for this meta object*/
238 int (*mdo_create_data)(const struct lu_env *env, struct md_object *p,
240 const struct md_op_spec *spec,
243 int (*mdo_rename)(const struct lu_env *env, struct md_object *spobj,
244 struct md_object *tpobj, const struct lu_fid *lf,
245 const struct lu_name *lsname, struct md_object *tobj,
246 const struct lu_name *ltname, struct md_attr *ma);
248 int (*mdo_link)(const struct lu_env *env, struct md_object *tgt_obj,
249 struct md_object *src_obj, const struct lu_name *lname,
252 int (*mdo_unlink)(const struct lu_env *env, struct md_object *pobj,
253 struct md_object *cobj, const struct lu_name *lname,
254 struct md_attr *ma, int no_name);
256 int (*mdo_migrate)(const struct lu_env *env, struct md_object *pobj,
257 struct md_object *sobj, const struct lu_name *lname,
258 struct md_object *tobj, struct md_attr *ma);
261 struct md_device_operations {
262 /** meta-data device related handlers. */
263 int (*mdo_root_get)(const struct lu_env *env, struct md_device *m,
266 int (*mdo_maxeasize_get)(const struct lu_env *env, struct md_device *m,
269 int (*mdo_statfs)(const struct lu_env *env, struct md_device *m,
270 struct obd_statfs *sfs);
272 int (*mdo_llog_ctxt_get)(const struct lu_env *env,
273 struct md_device *m, int idx, void **h);
275 int (*mdo_iocontrol)(const struct lu_env *env, struct md_device *m,
276 unsigned int cmd, int len, void *data);
280 struct lu_device md_lu_dev;
281 const struct md_device_operations *md_ops;
285 struct lu_object mo_lu;
286 const struct md_object_operations *mo_ops;
287 const struct md_dir_operations *mo_dir_ops;
290 /* Mark the object to be dead, and can not be accessed anymore.
291 * XXX, right now, it will only be used for striped directory to
292 * mark the slave stripes dead, when deleting master object. It will be
293 * stored in slave LMV EA (see lod_mark_dead_object), which is only
294 * temporary, and will be removed later when we have proper way to mark
295 * the dead object. */
296 #define LUSTRE_SLAVE_DEAD_FL 0x80000000
298 static inline struct md_device *lu2md_dev(const struct lu_device *d)
300 LASSERT(IS_ERR(d) || lu_device_is_md(d));
301 return container_of0(d, struct md_device, md_lu_dev);
304 static inline struct lu_device *md2lu_dev(struct md_device *d)
306 return &d->md_lu_dev;
309 static inline struct md_object *lu2md(const struct lu_object *o)
311 LASSERT(o == NULL || IS_ERR(o) || lu_device_is_md(o->lo_dev));
312 return container_of0(o, struct md_object, mo_lu);
315 static inline int md_device_init(struct md_device *md, struct lu_device_type *t)
317 return lu_device_init(&md->md_lu_dev, t);
320 static inline void md_device_fini(struct md_device *md)
322 lu_device_fini(&md->md_lu_dev);
325 static inline struct md_object *md_object_find_slice(const struct lu_env *env,
326 struct md_device *md,
327 const struct lu_fid *f)
329 return lu2md(lu_object_find_slice(env, md2lu_dev(md), f, NULL));
334 static inline int mo_permission(const struct lu_env *env,
340 LASSERT(c->mo_ops->moo_permission);
341 return c->mo_ops->moo_permission(env, p, c, at, mask);
344 static inline int mo_attr_get(const struct lu_env *env,
348 LASSERT(m->mo_ops->moo_attr_get);
349 return m->mo_ops->moo_attr_get(env, m, at);
352 static inline int mo_readlink(const struct lu_env *env,
356 LASSERT(m->mo_ops->moo_readlink);
357 return m->mo_ops->moo_readlink(env, m, buf);
360 static inline int mo_changelog(const struct lu_env *env,
361 enum changelog_rec_type type,
362 int flags, struct md_object *m)
364 LASSERT(m->mo_ops->moo_changelog);
365 return m->mo_ops->moo_changelog(env, type, flags, m);
368 static inline int mo_attr_set(const struct lu_env *env,
370 const struct md_attr *at)
372 LASSERT(m->mo_ops->moo_attr_set);
373 return m->mo_ops->moo_attr_set(env, m, at);
376 static inline int mo_xattr_get(const struct lu_env *env,
381 LASSERT(m->mo_ops->moo_xattr_get);
382 return m->mo_ops->moo_xattr_get(env, m, buf, name);
385 static inline int mo_xattr_del(const struct lu_env *env,
389 LASSERT(m->mo_ops->moo_xattr_del);
390 return m->mo_ops->moo_xattr_del(env, m, name);
393 static inline int mo_xattr_set(const struct lu_env *env,
395 const struct lu_buf *buf,
399 LASSERT(m->mo_ops->moo_xattr_set);
400 return m->mo_ops->moo_xattr_set(env, m, buf, name, flags);
403 static inline int mo_xattr_list(const struct lu_env *env,
407 LASSERT(m->mo_ops->moo_xattr_list);
408 return m->mo_ops->moo_xattr_list(env, m, buf);
411 static inline int mo_swap_layouts(const struct lu_env *env,
412 struct md_object *o1,
413 struct md_object *o2, __u64 flags)
415 LASSERT(o1->mo_ops->moo_swap_layouts);
416 LASSERT(o2->mo_ops->moo_swap_layouts);
417 if (o1->mo_ops->moo_swap_layouts != o2->mo_ops->moo_swap_layouts)
419 return o1->mo_ops->moo_swap_layouts(env, o1, o2, flags);
422 static inline int mo_open(const struct lu_env *env,
426 LASSERT(m->mo_ops->moo_open);
427 return m->mo_ops->moo_open(env, m, flags);
430 static inline int mo_close(const struct lu_env *env,
435 LASSERT(m->mo_ops->moo_close);
436 return m->mo_ops->moo_close(env, m, ma, mode);
439 static inline int mo_readpage(const struct lu_env *env,
441 const struct lu_rdpg *rdpg)
443 LASSERT(m->mo_ops->moo_readpage);
444 return m->mo_ops->moo_readpage(env, m, rdpg);
447 static inline int mo_object_sync(const struct lu_env *env, struct md_object *m)
449 LASSERT(m->mo_ops->moo_object_sync);
450 return m->mo_ops->moo_object_sync(env, m);
453 static inline int mo_object_lock(const struct lu_env *env,
455 struct lustre_handle *lh,
456 struct ldlm_enqueue_info *einfo,
457 union ldlm_policy_data *policy)
459 LASSERT(m->mo_ops->moo_object_lock);
460 return m->mo_ops->moo_object_lock(env, m, lh, einfo, policy);
463 static inline int mo_object_unlock(const struct lu_env *env,
465 struct ldlm_enqueue_info *einfo,
466 union ldlm_policy_data *policy)
468 LASSERT(m->mo_ops->moo_object_unlock);
469 return m->mo_ops->moo_object_unlock(env, m, einfo, policy);
472 static inline int mdo_lookup(const struct lu_env *env,
474 const struct lu_name *lname,
476 struct md_op_spec *spec)
478 LASSERT(p->mo_dir_ops->mdo_lookup);
479 return p->mo_dir_ops->mdo_lookup(env, p, lname, f, spec);
482 static inline mdl_mode_t mdo_lock_mode(const struct lu_env *env,
483 struct md_object *mo,
486 if (mo->mo_dir_ops->mdo_lock_mode == NULL)
488 return mo->mo_dir_ops->mdo_lock_mode(env, mo, lm);
491 static inline int mdo_create(const struct lu_env *env,
493 const struct lu_name *lchild_name,
495 struct md_op_spec *spc,
498 LASSERT(p->mo_dir_ops->mdo_create);
499 return p->mo_dir_ops->mdo_create(env, p, lchild_name, c, spc, at);
502 static inline int mdo_create_data(const struct lu_env *env,
505 const struct md_op_spec *spec,
508 LASSERT(c->mo_dir_ops->mdo_create_data);
509 return c->mo_dir_ops->mdo_create_data(env, p, c, spec, ma);
512 static inline int mdo_rename(const struct lu_env *env,
513 struct md_object *sp,
514 struct md_object *tp,
515 const struct lu_fid *lf,
516 const struct lu_name *lsname,
518 const struct lu_name *ltname,
521 LASSERT(tp->mo_dir_ops->mdo_rename);
522 return tp->mo_dir_ops->mdo_rename(env, sp, tp, lf, lsname, t, ltname,
526 static inline int mdo_migrate(const struct lu_env *env,
527 struct md_object *pobj,
528 struct md_object *sobj,
529 const struct lu_name *lname,
530 struct md_object *tobj,
533 LASSERT(pobj->mo_dir_ops->mdo_migrate);
534 return pobj->mo_dir_ops->mdo_migrate(env, pobj, sobj, lname, tobj, ma);
537 static inline int mdo_is_subdir(const struct lu_env *env,
538 struct md_object *mo,
539 const struct lu_fid *fid,
542 LASSERT(mo->mo_dir_ops->mdo_is_subdir);
543 return mo->mo_dir_ops->mdo_is_subdir(env, mo, fid, sfid);
546 static inline int mdo_link(const struct lu_env *env,
549 const struct lu_name *lname,
552 LASSERT(s->mo_dir_ops->mdo_link);
553 return s->mo_dir_ops->mdo_link(env, p, s, lname, ma);
556 static inline int mdo_unlink(const struct lu_env *env,
559 const struct lu_name *lname,
560 struct md_attr *ma, int no_name)
562 LASSERT(p->mo_dir_ops->mdo_unlink);
563 return p->mo_dir_ops->mdo_unlink(env, p, c, lname, ma, no_name);
567 * Used in MDD/OUT layer for object lock rule
569 enum mdd_object_role {
579 int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh);
580 void lustre_hsm2buf(void *buf, const struct md_hsm *mh);
599 __u32 uc_suppgids[2];
602 struct group_info *uc_ginfo;
603 struct md_identity *uc_identity;
604 char uc_jobid[LUSTRE_JOBID_SIZE];
607 struct lu_ucred *lu_ucred(const struct lu_env *env);
609 struct lu_ucred *lu_ucred_check(const struct lu_env *env);
611 struct lu_ucred *lu_ucred_assert(const struct lu_env *env);
613 int lu_ucred_global_init(void);
615 void lu_ucred_global_fini(void);
617 #define md_cap_t(x) (x)
619 #define MD_CAP_TO_MASK(x) (1 << (x))
621 #define md_cap_raised(c, flag) (md_cap_t(c) & MD_CAP_TO_MASK(flag))
623 /* capable() is copied from linux kernel! */
624 static inline int md_capable(struct lu_ucred *uc, cfs_cap_t cap)
626 if (md_cap_raised(uc->uc_cap, cap))
632 #endif /* _LINUX_MD_OBJECT_H */