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