1 /* $NetBSD: netbsd32_compat_20.c,v 1.34 2014/09/05 09:21:54 matt Exp $ */
2
3 /*
4 * Copyright (c) 1998, 2001 Matthew R. Green
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: netbsd32_compat_20.c,v 1.34 2014/09/05 09:21:54 matt Exp $");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/mount.h>
35 #include <sys/stat.h>
36 #include <sys/time.h>
37 #include <sys/ktrace.h>
38 #include <sys/vnode.h>
39 #include <sys/file.h>
40 #include <sys/filedesc.h>
41 #include <sys/namei.h>
42 #include <sys/syscallargs.h>
43 #include <sys/proc.h>
44 #include <sys/dirent.h>
45
46 #include <compat/netbsd32/netbsd32.h>
47 #include <compat/netbsd32/netbsd32_syscallargs.h>
48 #include <compat/netbsd32/netbsd32_conv.h>
49
50 static inline void compat_20_netbsd32_from_statvfs(struct statvfs *,
51 struct netbsd32_statfs *);
52
53 static inline void
compat_20_netbsd32_from_statvfs(struct statvfs * sbp,struct netbsd32_statfs * sb32p)54 compat_20_netbsd32_from_statvfs(struct statvfs *sbp, struct netbsd32_statfs *sb32p)
55 {
56 sb32p->f_flags = sbp->f_flag;
57 sb32p->f_bsize = (netbsd32_long)sbp->f_bsize;
58 sb32p->f_iosize = (netbsd32_long)sbp->f_iosize;
59 sb32p->f_blocks = (netbsd32_long)sbp->f_blocks;
60 sb32p->f_bfree = (netbsd32_long)sbp->f_bfree;
61 sb32p->f_bavail = (netbsd32_long)sbp->f_bavail;
62 sb32p->f_files = (netbsd32_long)sbp->f_files;
63 sb32p->f_ffree = (netbsd32_long)sbp->f_ffree;
64 sb32p->f_fsid = sbp->f_fsidx;
65 sb32p->f_owner = sbp->f_owner;
66 sb32p->f_spare[0] = 0;
67 sb32p->f_spare[1] = 0;
68 sb32p->f_spare[2] = 0;
69 sb32p->f_spare[3] = 0;
70 (void)memcpy(sb32p->f_fstypename, sbp->f_fstypename,
71 sizeof(sb32p->f_fstypename));
72 (void)memcpy(sb32p->f_mntonname, sbp->f_mntonname,
73 sizeof(sb32p->f_mntonname));
74 (void)memcpy(sb32p->f_mntfromname, sbp->f_mntfromname,
75 sizeof(sb32p->f_mntfromname));
76 }
77
78 int
compat_20_netbsd32_getfsstat(struct lwp * l,const struct compat_20_netbsd32_getfsstat_args * uap,register_t * retval)79 compat_20_netbsd32_getfsstat(struct lwp *l, const struct compat_20_netbsd32_getfsstat_args *uap, register_t *retval)
80 {
81 /* {
82 syscallarg(netbsd32_statfsp_t) buf;
83 syscallarg(netbsd32_long) bufsize;
84 syscallarg(int) flags;
85 } */
86 int root = 0;
87 struct proc *p = l->l_proc;
88 struct mount *mp, *nmp;
89 struct statvfs *sb;
90 struct netbsd32_statfs sb32;
91 void *sfsp;
92 size_t count, maxcount;
93 int error = 0;
94
95 sb = STATVFSBUF_GET();
96 maxcount = SCARG(uap, bufsize) / sizeof(struct netbsd32_statfs);
97 sfsp = SCARG_P32(uap, buf);
98 mutex_enter(&mountlist_lock);
99 count = 0;
100 for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
101 if (vfs_busy(mp, &nmp)) {
102 continue;
103 }
104 if (sfsp && count < maxcount) {
105 error = dostatvfs(mp, sb, l, SCARG(uap, flags), 0);
106 if (error) {
107 vfs_unbusy(mp, false, &nmp);
108 error = 0;
109 continue;
110 }
111 compat_20_netbsd32_from_statvfs(sb, &sb32);
112 error = copyout(&sb32, sfsp, sizeof(sb32));
113 if (error) {
114 vfs_unbusy(mp, false, NULL);
115 goto out;
116 }
117 sfsp = (char *)sfsp + sizeof(sb32);
118 root |= strcmp(sb->f_mntonname, "/") == 0;
119 }
120 count++;
121 vfs_unbusy(mp, false, &nmp);
122 }
123 mutex_exit(&mountlist_lock);
124
125 if (root == 0 && p->p_cwdi->cwdi_rdir) {
126 /*
127 * fake a root entry
128 */
129 error = dostatvfs(p->p_cwdi->cwdi_rdir->v_mount,
130 sb, l, SCARG(uap, flags), 1);
131 if (error != 0)
132 goto out;
133 if (sfsp) {
134 compat_20_netbsd32_from_statvfs(sb, &sb32);
135 error = copyout(&sb32, sfsp, sizeof(sb32));
136 if (error != 0)
137 goto out;
138 }
139 count++;
140 }
141
142 if (sfsp && count > maxcount)
143 *retval = maxcount;
144 else
145 *retval = count;
146 out:
147 STATVFSBUF_PUT(sb);
148 return error;
149 }
150
151 int
compat_20_netbsd32_statfs(struct lwp * l,const struct compat_20_netbsd32_statfs_args * uap,register_t * retval)152 compat_20_netbsd32_statfs(struct lwp *l, const struct compat_20_netbsd32_statfs_args *uap, register_t *retval)
153 {
154 /* {
155 syscallarg(const netbsd32_charp) path;
156 syscallarg(netbsd32_statfsp_t) buf;
157 } */
158 struct mount *mp;
159 struct statvfs *sb;
160 struct netbsd32_statfs s32;
161 int error;
162 struct vnode *vp;
163
164 error = namei_simple_user(SCARG_P32(uap, path),
165 NSM_FOLLOW_TRYEMULROOT, &vp);
166 if (error != 0)
167 return (error);
168 mp = vp->v_mount;
169 sb = &mp->mnt_stat;
170 vrele(vp);
171 if ((error = dostatvfs(mp, sb, l, 0, 0)) != 0)
172 return (error);
173 compat_20_netbsd32_from_statvfs(sb, &s32);
174 return copyout(&s32, SCARG_P32(uap, buf), sizeof(s32));
175 }
176
177 int
compat_20_netbsd32_fstatfs(struct lwp * l,const struct compat_20_netbsd32_fstatfs_args * uap,register_t * retval)178 compat_20_netbsd32_fstatfs(struct lwp *l, const struct compat_20_netbsd32_fstatfs_args *uap, register_t *retval)
179 {
180 /* {
181 syscallarg(int) fd;
182 syscallarg(netbsd32_statfsp_t) buf;
183 } */
184 file_t *fp;
185 struct mount *mp;
186 struct statvfs *sb;
187 struct netbsd32_statfs s32;
188 int error;
189
190 /* fd_getvnode() will use the descriptor for us */
191 if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
192 return (error);
193 mp = fp->f_vnode->v_mount;
194 sb = &mp->mnt_stat;
195 if ((error = dostatvfs(mp, sb, l, 0, 0)) != 0)
196 goto out;
197 compat_20_netbsd32_from_statvfs(sb, &s32);
198 error = copyout(&s32, SCARG_P32(uap, buf), sizeof(s32));
199 out:
200 fd_putfile(SCARG(uap, fd));
201 return (error);
202 }
203
204 int
compat_20_netbsd32_fhstatfs(struct lwp * l,const struct compat_20_netbsd32_fhstatfs_args * uap,register_t * retval)205 compat_20_netbsd32_fhstatfs(struct lwp *l, const struct compat_20_netbsd32_fhstatfs_args *uap, register_t *retval)
206 {
207 /* {
208 syscallarg(const netbsd32_fhandlep_t) fhp;
209 syscallarg(struct statvfs *) buf;
210 } */
211 struct compat_30_sys_fhstatvfs1_args ua;
212
213 NETBSD32TOP_UAP(fhp, const struct compat_30_fhandle);
214 NETBSD32TOP_UAP(buf, struct statvfs);
215 #ifdef notyet
216 NETBSD32TOP_UAP(flags, int);
217 #endif
218 return (compat_30_sys_fhstatvfs1(l, &ua, retval));
219 }
220