xref: /illumos-gate/usr/src/uts/common/fs/objfs/objfs_common.c (revision 2d6eb4a5e0a47d30189497241345dc5466bb68ab)
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 #include <sys/errno.h>
27 #include <sys/file.h>
28 #include <sys/objfs.h>
29 #include <sys/objfs_impl.h>
30 
31 /*
32  * For directories, make sure we are using large-file aware interfaces and we
33  * aren't trying to open it writeable.
34  */
35 /* ARGSUSED */
36 int
objfs_dir_open(vnode_t ** cpp,int flag,cred_t * cr,caller_context_t * ct)37 objfs_dir_open(vnode_t **cpp, int flag, cred_t *cr,
38     caller_context_t *ct)
39 {
40 	if ((flag & (FOFFMAX | FWRITE)) != FOFFMAX)
41 		return (EINVAL);
42 
43 	return (0);
44 }
45 
46 /*
47  * For all vnodes which have no cleanup to do at close time.
48  */
49 /* ARGSUSED */
50 int
objfs_common_close(vnode_t * vp,int flag,int count,offset_t off,cred_t * cr,caller_context_t * ct)51 objfs_common_close(vnode_t *vp, int flag, int count, offset_t off, cred_t *cr,
52     caller_context_t *ct)
53 {
54 	return (0);
55 }
56 
57 /*
58  * For directories, ensure we're not open for writing.
59  */
60 /* ARGSUSED */
61 int
objfs_dir_access(vnode_t * vp,int mode,int flags,cred_t * cr,caller_context_t * ct)62 objfs_dir_access(vnode_t *vp, int mode, int flags, cred_t *cr,
63     caller_context_t *ct)
64 {
65 	if (mode & VWRITE)
66 		return (EACCES);
67 
68 	return (0);
69 }
70 
71 /*
72  * Fills in common fields for getattr().
73  */
74 int
objfs_common_getattr(vnode_t * vp,vattr_t * vap)75 objfs_common_getattr(vnode_t *vp, vattr_t *vap)
76 {
77 	vap->va_uid = 0;
78 	vap->va_gid = 0;
79 	vap->va_rdev = 0;
80 	vap->va_blksize = DEV_BSIZE;
81 	vap->va_nblocks = howmany(vap->va_size, vap->va_blksize);
82 	vap->va_seq = 0;
83 	vap->va_fsid = vp->v_vfsp->vfs_dev;
84 
85 	return (0);
86 }
87 
88 /*
89  * Returns the number objects currently loaded in the system.
90  */
91 int
objfs_nobjs(void)92 objfs_nobjs(void)
93 {
94 	int count = 0;
95 	struct modctl *mp;
96 
97 	mutex_enter(&mod_lock);
98 	mp = &modules;
99 
100 	do {
101 		if (mp->mod_loaded)
102 			count++;
103 	} while ((mp = mp->mod_next) != &modules);
104 
105 	mutex_exit(&mod_lock);
106 
107 	return (count);
108 }
109