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
27
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <sys/time.h>
31 #include <sys/cred.h>
32 #include <sys/vfs.h>
33 #include <sys/vfs_opreg.h>
34 #include <sys/gfs.h>
35 #include <sys/vnode.h>
36 #include <sys/systm.h>
37 #include <sys/errno.h>
38 #include <sys/sysmacros.h>
39 #include <fs/fs_subr.h>
40 #include <sys/contract.h>
41 #include <sys/contract_impl.h>
42 #include <sys/ctfs.h>
43 #include <sys/ctfs_impl.h>
44 #include <sys/file.h>
45 #include <sys/pathname.h>
46
47 /*
48 * Entries in a /system/contract/<type>/<ctid> directory.
49 */
50 static gfs_dirent_t ctfs_ctls[] = {
51 { "ctl", ctfs_create_ctlnode, GFS_CACHE_VNODE, },
52 { "status", ctfs_create_statnode, GFS_CACHE_VNODE },
53 { "events", ctfs_create_evnode },
54 { NULL }
55 };
56 #define CTFS_NCTLS ((sizeof ctfs_ctls / sizeof (gfs_dirent_t)) - 1)
57
58 static ino64_t ctfs_cdir_do_inode(vnode_t *, int);
59
60 /*
61 * ctfs_create_cdirnode
62 *
63 * If necessary, creates a cdirnode for the specified contract and
64 * inserts it into the contract's list of vnodes. Returns either the
65 * existing vnode or the new one.
66 */
67 vnode_t *
68 ctfs_create_cdirnode(vnode_t *pvp, contract_t *ct)
69 {
70 vnode_t *vp;
71 ctfs_cdirnode_t *cdir;
72
73 if ((vp = contract_vnode_get(ct, pvp->v_vfsp)) != NULL)
74 return (vp);
75
76 vp = gfs_dir_create(sizeof (ctfs_cdirnode_t), pvp, ctfs_ops_cdir,
77 ctfs_ctls, ctfs_cdir_do_inode, CTFS_NAME_MAX, NULL, NULL);
78 cdir = vp->v_data;
79
80 /*
81 * We must set the inode because this is called explicitly rather than
82 * through GFS callbacks.
83 */
84 gfs_file_set_inode(vp, CTFS_INO_CT_DIR(ct->ct_id));
85
86 cdir->ctfs_cn_contract = ct;
87 contract_hold(ct);
88 contract_vnode_set(ct, &cdir->ctfs_cn_linkage, vp);
89
90 return (vp);
91 }
92
93 /*
94 * ctfs_cdir_getattr - VOP_GETATTR entry point
95 */
96 /* ARGSUSED */
97 static int
98 ctfs_cdir_getattr(
99 vnode_t *vp,
100 vattr_t *vap,
101 int flags,
102 cred_t *cr,
103 caller_context_t *ct)
104 {
105 ctfs_cdirnode_t *cdirnode = vp->v_data;
106
107 vap->va_type = VDIR;
108 vap->va_mode = 0555;
109 vap->va_nlink = 2 + CTFS_NCTLS;
110 vap->va_size = vap->va_nlink;
111 vap->va_ctime = cdirnode->ctfs_cn_contract->ct_ctime;
112 mutex_enter(&cdirnode->ctfs_cn_contract->ct_events.ctq_lock);
113 vap->va_atime = vap->va_mtime =
114 cdirnode->ctfs_cn_contract->ct_events.ctq_atime;
115 mutex_exit(&cdirnode->ctfs_cn_contract->ct_events.ctq_lock);
116 ctfs_common_getattr(vp, vap);
117
118 return (0);
119 }
120
121 /*
122 * ctfs_cdir_do_inode - return inode number based on static index
123 */
124 static ino64_t
125 ctfs_cdir_do_inode(vnode_t *vp, int index)
126 {
127 ctfs_cdirnode_t *cdirnode = vp->v_data;
128
129 return (CTFS_INO_CT_FILE(cdirnode->ctfs_cn_contract->ct_id, index));
130 }
131
132 /*
133 * ctfs_cdir_inactive - VOP_INACTIVE entry point
134 */
135 /* ARGSUSED */
136 static void
137 ctfs_cdir_inactive(vnode_t *vp, cred_t *cr, caller_context_t *cct)
138 {
139 ctfs_cdirnode_t *cdirnode = vp->v_data;
140 contract_t *ct = cdirnode->ctfs_cn_contract;
141
142 mutex_enter(&ct->ct_lock);
143 if (gfs_dir_inactive(vp) == NULL) {
144 mutex_exit(&ct->ct_lock);
145 return;
146 }
147
148 list_remove(&ct->ct_vnodes, &cdirnode->ctfs_cn_linkage);
149 mutex_exit(&ct->ct_lock);
150
151 contract_rele(ct);
152 kmem_free(cdirnode, sizeof (ctfs_cdirnode_t));
153 }
154
155
156 const fs_operation_def_t ctfs_tops_cdir[] = {
157 { VOPNAME_OPEN, { .vop_open = ctfs_open } },
158 { VOPNAME_CLOSE, { .vop_close = ctfs_close } },
159 { VOPNAME_IOCTL, { .error = fs_inval } },
160 { VOPNAME_GETATTR, { .vop_getattr = ctfs_cdir_getattr } },
161 { VOPNAME_ACCESS, { .vop_access = ctfs_access_dir } },
162 { VOPNAME_READDIR, { .vop_readdir = gfs_vop_readdir } },
163 { VOPNAME_LOOKUP, { .vop_lookup = gfs_vop_lookup } },
164 { VOPNAME_SEEK, { .vop_seek = fs_seek } },
165 { VOPNAME_INACTIVE, { .vop_inactive = ctfs_cdir_inactive } },
166 { NULL, { NULL } }
167 };