1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/cmm/cmm_internal.h
38 * Lustre Cluster Metadata Manager (cmm)
40 * Author: Mike Pershin <tappro@clusterfs.com>
43 #ifndef _CMM_INTERNAL_H
44 #define _CMM_INTERNAL_H
46 #if defined(__KERNEL__)
49 #include <lustre_fld.h>
50 #include <md_object.h>
51 #include <lustre_acl.h>
55 struct md_device cmm_md_dev;
56 /* device flags, taken from enum cmm_flags */
58 /* underlaying device in MDS stack, usually MDD */
59 struct md_device *cmm_child;
60 /* FLD client to talk to FLD */
61 struct lu_client_fld *cmm_fld;
62 /* other MD servers in cluster */
63 mdsno_t cmm_local_num;
65 struct list_head cmm_targets;
66 spinlock_t cmm_tgt_guard;
67 cfs_proc_dir_entry_t *cmm_proc_entry;
68 struct lprocfs_stats *cmm_stats;
73 * Device initialization complete.
75 CMM_INITIALIZED = 1 << 0
78 static inline struct md_device_operations *cmm_child_ops(struct cmm_device *d)
80 return (d->cmm_child->md_ops);
83 static inline struct cmm_device *md2cmm_dev(struct md_device *m)
85 return container_of0(m, struct cmm_device, cmm_md_dev);
88 static inline struct cmm_device *lu2cmm_dev(struct lu_device *d)
90 return container_of0(d, struct cmm_device, cmm_md_dev.md_lu_dev);
93 static inline struct lu_device *cmm2lu_dev(struct cmm_device *d)
95 return (&d->cmm_md_dev.md_lu_dev);
98 #ifdef HAVE_SPLIT_SUPPORT
99 enum cmm_split_state {
109 struct md_object cmo_obj;
112 /* local CMM object */
114 struct cmm_object cmm_obj;
115 #ifdef HAVE_SPLIT_SUPPORT
116 /* split state of object (for dirs only)*/
117 enum cmm_split_state clo_split;
121 /* remote CMM object */
123 struct cmm_object cmm_obj;
124 /* mds number where object is placed */
129 CMM_SPLIT_PAGE_COUNT = 1
132 struct cmm_thread_info {
133 struct md_attr cmi_ma;
134 struct lu_buf cmi_buf;
135 struct lu_fid cmi_fid; /* used for le/cpu conversions */
136 struct lu_rdpg cmi_rdpg;
137 /* pointers to pages for readpage. */
138 struct page *cmi_pages[CMM_SPLIT_PAGE_COUNT];
139 struct md_op_spec cmi_spec;
140 struct lmv_stripe_md cmi_lmv;
141 char cmi_xattr_buf[LUSTRE_POSIX_ACL_MAX_SIZE];
143 /* Ops object filename */
144 struct lu_name cti_name;
147 static inline struct cmm_device *cmm_obj2dev(struct cmm_object *c)
149 return (md2cmm_dev(md_obj2dev(&c->cmo_obj)));
152 static inline struct cmm_object *lu2cmm_obj(struct lu_object *o)
154 //LASSERT(lu_device_is_cmm(o->lo_dev));
155 return container_of0(o, struct cmm_object, cmo_obj.mo_lu);
158 /* get cmm object from md_object */
159 static inline struct cmm_object *md2cmm_obj(struct md_object *o)
161 return container_of0(o, struct cmm_object, cmo_obj);
163 /* get lower-layer object */
164 static inline struct md_object *cmm2child_obj(struct cmm_object *o)
166 return (o ? lu2md(lu_object_next(&o->cmo_obj.mo_lu)) : NULL);
169 static inline struct lu_fid* cmm2fid(struct cmm_object *obj)
171 return &(obj->cmo_obj.mo_lu.lo_header->loh_fid);
174 struct cmm_thread_info *cmm_env_info(const struct lu_env *env);
177 struct lu_object *cmm_object_alloc(const struct lu_env *env,
178 const struct lu_object_header *hdr,
182 * local CMM object operations. cml_...
184 static inline struct cml_object *lu2cml_obj(struct lu_object *o)
186 return container_of0(o, struct cml_object, cmm_obj.cmo_obj.mo_lu);
188 static inline struct cml_object *md2cml_obj(struct md_object *mo)
190 return container_of0(mo, struct cml_object, cmm_obj.cmo_obj);
192 static inline struct cml_object *cmm2cml_obj(struct cmm_object *co)
194 return container_of0(co, struct cml_object, cmm_obj);
197 int cmm_upcall(const struct lu_env *env, struct md_device *md,
198 enum md_upcall_event ev);
200 #ifdef HAVE_SPLIT_SUPPORT
202 #define CMM_MD_SIZE(stripes) (sizeof(struct lmv_stripe_md) + \
203 (stripes) * sizeof(struct lu_fid))
206 static inline struct lu_buf *cmm_buf_get(const struct lu_env *env,
207 void *area, ssize_t len)
211 buf = &cmm_env_info(env)->cmi_buf;
217 int cmm_split_check(const struct lu_env *env, struct md_object *mp,
220 int cmm_split_expect(const struct lu_env *env, struct md_object *mo,
221 struct md_attr *ma, int *split);
223 int cmm_split_dir(const struct lu_env *env, struct md_object *mo);
225 int cmm_split_access(const struct lu_env *env, struct md_object *mo,
229 int cmm_fld_lookup(struct cmm_device *cm, const struct lu_fid *fid,
230 mdsno_t *mds, const struct lu_env *env);
232 int cmm_procfs_init(struct cmm_device *cmm, const char *name);
233 int cmm_procfs_fini(struct cmm_device *cmm);
235 void cmm_lprocfs_time_start(const struct lu_env *env);
236 void cmm_lprocfs_time_end(const struct lu_env *env, struct cmm_device *cmm,
240 LPROC_CMM_SPLIT_CHECK,
247 #endif /* __KERNEL__ */
248 #endif /* _CMM_INTERNAL_H */