1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 1996-1998 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #ifndef _SYS_FS_CACHEFS_FILEGRP_H
28 #define _SYS_FS_CACHEFS_FILEGRP_H
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35
36 struct cachefs_metadata;
37
38 /*
39 * filegrp structure represents a group of front files.
40 */
41 struct filegrp {
42 uint_t fg_flags; /* CFS_FS_* flags */
43 int fg_count; /* cnodes in group */
44 cfs_cid_t fg_id; /* starting id in group */
45 struct fscache *fg_fscp; /* back ptr to fscache */
46
47 struct cnode *fg_cnodelist; /* list of cnodes */
48
49 struct filegrp *fg_next; /* pointer to next */
50 struct vnode *fg_dirvp; /* filegrp directory vp */
51 struct vnode *fg_attrvp; /* attrcache vp */
52 struct attrcache_header *fg_header; /* Attrcache header */
53 struct attrcache_index *fg_offsets; /* ptr to indexes in header */
54 uchar_t *fg_alloclist; /* allocation bitmap */
55
56 int fg_headersize; /* attrcache header size */
57 int fg_filesize; /* size of attrcache file */
58 kmutex_t fg_mutex; /* filegrp contents/ac lock */
59 kmutex_t fg_cnodelock; /* cnode list lock */
60 };
61 typedef struct filegrp filegrp_t;
62
63 extern struct kmem_cache *cachefs_filegrp_cache;
64
65 /* fg_flags values */
66 #define CFS_FG_NOCACHE 0x1 /* no cache mode */
67 #define CFS_FG_ALLOC_ATTR 0x2 /* no attrcache file yet */
68 #define CFS_FG_UPDATED 0x4 /* attrcache modified */
69 #define CFS_FG_ALLOC_FILE 0x10 /* no front file dir yet */
70 #define CFS_FG_RL 0x20 /* no longer used */
71 #define CFS_FG_READ 0x40 /* attrcache can be read */
72 #define CFS_FG_WRITE 0x80 /* attrcache can be written */
73
74 int filegrp_cache_create(void *, void *, int);
75 void filegrp_cache_destroy(void *, void *);
76 filegrp_t *filegrp_create(struct fscache *fscp, cfs_cid_t *cidp);
77 void filegrp_destroy(filegrp_t *fgp);
78 int filegrp_allocattr(filegrp_t *fgp);
79 int filegrpdir_create(filegrp_t *fgp);
80 int filegrpdir_find(filegrp_t *fgp);
81 void filegrp_hold(filegrp_t *fgp);
82 void filegrp_rele(filegrp_t *fgp);
83 int filegrp_ffhold(filegrp_t *fgp);
84 void filegrp_ffrele(filegrp_t *fgp);
85
86 int filegrp_sync(filegrp_t *fgp);
87 int filegrp_read_metadata(filegrp_t *fgp, cfs_cid_t *cidp,
88 struct cachefs_metadata *mdp);
89 int filegrp_create_metadata(filegrp_t *fgp, struct cachefs_metadata *md,
90 cfs_cid_t *cidp);
91 int filegrp_write_metadata(filegrp_t *fgp, cfs_cid_t *cidp,
92 struct cachefs_metadata *mdp);
93 int filegrp_destroy_metadata(filegrp_t *fgp, cfs_cid_t *cidp);
94 int filegrp_cid_to_slot(filegrp_t *fgp, cfs_cid_t *cidp);
95
96 filegrp_t *filegrp_list_find(struct fscache *fscp, cfs_cid_t *cidp);
97 void filegrp_list_add(struct fscache *fscp, filegrp_t *fgp);
98 void filegrp_list_remove(struct fscache *fscp, filegrp_t *fgp);
99 void filegrp_list_gc(struct fscache *fscp);
100 void filegrp_list_enable_caching_ro(struct fscache *fscp);
101 void filegrp_list_enable_caching_rw(struct fscache *fscp);
102
103 #ifdef __cplusplus
104 }
105 #endif
106
107 #endif /* _SYS_FS_CACHEFS_FILEGRP_H */