xref: /titanic_41/usr/src/uts/common/fs/objfs/objfs_common.c (revision da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0)
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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 #include <sys/errno.h>
29 #include <sys/file.h>
30 #include <sys/objfs.h>
31 #include <sys/objfs_impl.h>
32 
33 /*
34  * For directories, make sure we are using large-file aware interfaces and we
35  * aren't trying to open it writeable.
36  */
37 /* ARGSUSED */
38 int
objfs_dir_open(vnode_t ** cpp,int flag,cred_t * cr,caller_context_t * ct)39 objfs_dir_open(vnode_t **cpp, int flag, cred_t *cr,
40     caller_context_t *ct)
41 {
42 	if ((flag & (FOFFMAX | FWRITE)) != FOFFMAX)
43 		return (EINVAL);
44 
45 	return (0);
46 }
47 
48 /*
49  * For all vnodes which have no cleanup to do at close time.
50  */
51 /* ARGSUSED */
52 int
objfs_common_close(vnode_t * vp,int flag,int count,offset_t off,cred_t * cr,caller_context_t * ct)53 objfs_common_close(vnode_t *vp, int flag, int count, offset_t off, cred_t *cr,
54     caller_context_t *ct)
55 {
56 	return (0);
57 }
58 
59 /*
60  * For directories, ensure we're not open for writing.
61  */
62 /* ARGSUSED */
63 int
objfs_dir_access(vnode_t * vp,int mode,int flags,cred_t * cr,caller_context_t * ct)64 objfs_dir_access(vnode_t *vp, int mode, int flags, cred_t *cr,
65     caller_context_t *ct)
66 {
67 	if (mode & VWRITE)
68 		return (EACCES);
69 
70 	return (0);
71 }
72 
73 /*
74  * Fills in common fields for getattr().
75  */
76 int
objfs_common_getattr(vnode_t * vp,vattr_t * vap)77 objfs_common_getattr(vnode_t *vp, vattr_t *vap)
78 {
79 	vap->va_uid = 0;
80 	vap->va_gid = 0;
81 	vap->va_rdev = 0;
82 	vap->va_blksize = DEV_BSIZE;
83 	vap->va_nblocks = howmany(vap->va_size, vap->va_blksize);
84 	vap->va_seq = 0;
85 	vap->va_fsid = vp->v_vfsp->vfs_dev;
86 
87 	return (0);
88 }
89 
90 /*
91  * Returns the number objects currently loaded in the system.
92  */
93 int
objfs_nobjs(void)94 objfs_nobjs(void)
95 {
96 	int count = 0;
97 	struct modctl *mp;
98 
99 	mutex_enter(&mod_lock);
100 	mp = &modules;
101 
102 	do {
103 		if (mp->mod_loaded)
104 			count++;
105 	} while ((mp = mp->mod_next) != &modules);
106 
107 	mutex_exit(&mod_lock);
108 
109 	return (count);
110 }
111