1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
14 */
15
16 #include <sys/types.h>
17 #include <sys/param.h>
18 #include <sys/t_lock.h>
19 #include <sys/errno.h>
20 #include <sys/cred.h>
21 #include <sys/user.h>
22 #include <sys/uio.h>
23 #include <sys/file.h>
24 #include <sys/pathname.h>
25 #include <sys/vfs.h>
26 #include <sys/vnode.h>
27 #include <sys/stat.h>
28 #include <sys/mode.h>
29 #include <sys/conf.h>
30 #include <sys/sysmacros.h>
31 #include <sys/cmn_err.h>
32 #include <sys/systm.h>
33 #include <sys/kmem.h>
34 #include <sys/debug.h>
35 #include <sys/acl.h>
36 #include <sys/nbmlock.h>
37 #include <sys/fcntl.h>
38 #include <sys/poll.h>
39
40 #include <errno.h>
41 #include <fcntl.h>
42 #include <unistd.h>
43
44 #include "vncache.h"
45
46 #define VFTBITS(feature) ((feature) & 0xFFFFFFFFLL)
47
48 static uint64_t vfs_features = VFSFT_XVATTR;
49
50 vnode_t *rootdir = NULL; /* pointer to root inode vnode. */
51
52 static struct vfs fake_rootvfs;
53 struct vfs *rootvfs = NULL;
54
55 int
56 fksmbsrv_vfs_init(void)
57 {
58 struct stat st;
59 int err, fd;
60 vnode_t *vp;
61 char *name = "/";
62
63 if (rootvfs == NULL) {
64 rootvfs = &fake_rootvfs;
65 rootvfs->vfs_mntpt = refstr_alloc(name);
66 rootvfs->vfs_fsid.val[0] = 1;
67 }
68
69 if (rootdir == NULL) {
70 if (lstat(name, &st) == -1)
71 return (errno);
72 fd = open(name, O_RDONLY, 0);
73 if (fd < 0) {
74 return (errno);
75 }
76 if (fstat(fd, &st) == -1) {
77 err = errno;
78 (void) close(fd);
79 return (err);
80 }
81 vp = vncache_enter(&st, NULL, "", fd);
82 /* extra hold for rootvp */
83 vn_hold(vp);
84 rootdir = vp;
85
86 /* VFS stuff in global zone struct. */
87 zone0.zone_rootvp = rootdir;
88 zone0.zone_rootpath = "/";
89 }
90
91 return (0);
92
93 }
94
95
96 /*
97 * Query a vfs for a feature.
98 * Returns 1 if feature is present, 0 if not
99 */
100 /* ARGSUSED */
101 int
102 vfs_has_feature(vfs_t *vfsp, vfs_feature_t feature)
103 {
104 int ret = 0;
105
106 if (vfs_features & VFTBITS(feature))
107 ret = 1;
108
109 return (ret);
110 }
111
112 /* ARGSUSED */
113 struct vfs *
114 getvfs(fsid_t *fsid)
115 {
116 return (rootvfs);
117 }
118
119 vfsops_t *
120 vfs_getops(vfs_t *vfsp)
121 {
122 return (vfsp->vfs_op);
123 }
124
125 /* ARGSUSED */
126 struct vfssw *
127 vfs_getvfsswbyvfsops(vfsops_t *vfsops)
128 {
129 return (NULL);
130 }
131
132 /* ARGSUSED */
133 void
134 vfs_unrefvfssw(struct vfssw *vswp)
135 {
136 }
137
138 /* ARGSUSED */
139 int
140 fsop_root(vfs_t *vfsp, vnode_t **vpp)
141 {
142 vnode_t *vp;
143
144 if ((vp = rootdir) == NULL)
145 return (ENXIO);
146
147 vn_hold(vp);
148 *vpp = vp;
149 return (0);
150 }
151
152 /* ARGSUSED */
153 int
154 fsop_statfs(vfs_t *vfsp, statvfs64_t *sp)
155 {
156 vnode_t *vp;
157 int rc;
158
159 if ((vp = rootdir) == NULL)
160 return (ENXIO);
161
162 rc = fstatvfs64(vp->v_fd, sp);
163 if (rc == -1) {
164 rc = errno;
165 }
166
167 return (rc);
168 }
169
170 refstr_t *
171 vfs_getmntpoint(const struct vfs *vfsp)
172 {
173 refstr_t *mntpt;
174
175 mntpt = vfsp->vfs_mntpt;
176 refstr_hold(mntpt);
177
178 return (mntpt);
179 }
180
181 /* ARGSUSED */
182 void
183 vfs_hold(vfs_t *vfsp)
184 {
185 }
186
187 /* ARGSUSED */
188 void
189 vfs_rele(vfs_t *vfsp)
190 {
191 }
192
193 /* ARGSUSED */
194 int
195 vfs_lock(vfs_t *vfsp)
196 {
197 return (0);
198 }
199
200 /* ARGSUSED */
201 int
202 vfs_rlock(vfs_t *vfsp)
203 {
204 return (0);
205 }
206
207 /* ARGSUSED */
208 void
209 vfs_lock_wait(vfs_t *vfsp)
210 {
211 }
212
213 /* ARGSUSED */
214 void
215 vfs_rlock_wait(vfs_t *vfsp)
216 {
217 }
218
219 /* ARGSUSED */
220 void
221 vfs_unlock(vfs_t *vfsp)
222 {
223 }
224
225
226 static u_longlong_t fs_caller_id;
227 u_longlong_t
228 fs_new_caller_id(void)
229 {
230 return (++fs_caller_id);
231 }
232
233 static sysid_t lm_sysid;
234 sysid_t
235 lm_alloc_sysidt(void)
236 {
237 return (++lm_sysid);
238 }
239
240 /* ARGSUSED */
241 void
242 lm_free_sysidt(sysid_t id)
243 {
244 }