1 /*
2 * 43BSD_FILE.C - 4.3BSD compatibility file syscalls
3 *
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * $DragonFly: src/sys/emulation/43bsd/43bsd_file.c,v 1.11 2006/09/05 00:55:44 dillon Exp $
37 * from: DragonFly kern/vfs_syscalls.c,v 1.20
38 *
39 * These syscalls used to live in kern/vfs_syscalls.c. They are modified
40 * to use the new split syscalls.
41 */
42
43 #include "opt_compat.h"
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/sysproto.h>
48 #include <sys/conf.h>
49 #include <sys/dirent.h>
50 #include <sys/fcntl.h>
51 #include <sys/file.h>
52 #include <sys/filedesc.h>
53 #include <sys/kernel.h>
54 #include <sys/kern_syscall.h>
55 #include <sys/malloc.h>
56 #include <sys/mount.h>
57 #include <sys/uio.h>
58 #include <sys/namei.h>
59 #include <sys/nlookup.h>
60 #include <sys/vnode.h>
61
62 #include <sys/mplock2.h>
63
64 #include <vfs/union/union.h>
65
66 /*
67 * MPALMOSTSAFE
68 */
69 int
70 sys_ocreat(struct ocreat_args *uap)
71 {
72 struct nlookupdata nd;
73 int error;
74
75 get_mplock();
76 error = nlookup_init(&nd, uap->path, UIO_USERSPACE, NLC_FOLLOW);
77 if (error == 0) {
78 error = kern_open(&nd, O_WRONLY | O_CREAT | O_TRUNC,
79 uap->mode, &uap->sysmsg_iresult);
80 }
81 rel_mplock();
82 return (error);
83 }
84
85 /*
86 * MPALMOSTSAFE
87 */
88 int
89 sys_oftruncate(struct oftruncate_args *uap)
90 {
91 int error;
92
93 get_mplock();
94 error = kern_ftruncate(uap->fd, uap->length);
95 rel_mplock();
96
97 return (error);
98 }
99
100 /*
101 * MPSAFE
102 */
103 int
104 sys_olseek(struct olseek_args *uap)
105 {
106 int error;
107
108 error = kern_lseek(uap->fd, uap->offset, uap->whence,
109 &uap->sysmsg_offset);
110
111 return (error);
112 }
113
114 /*
115 * MPALMOSTSAFE
116 */
117 int
118 sys_otruncate(struct otruncate_args *uap)
119 {
120 struct nlookupdata nd;
121 int error;
122
123 get_mplock();
124 error = nlookup_init(&nd, uap->path, UIO_USERSPACE, NLC_FOLLOW);
125 if (error == 0)
126 error = kern_truncate(&nd, uap->length);
127 nlookup_done(&nd);
128 rel_mplock();
129 return (error);
130 }
131
132 #define PADDED_SIZE(x) \
133 ((sizeof(struct odirent) + (x) + 1 + 3) & ~3)
134 #define MAX_NAMELEN 255
135
136 struct odirent {
137 uint32_t od_fileno;
138 uint16_t od_reclen;
139 uint8_t od_type;
140 uint8_t od_namlen;
141 char od_name[];
142 };
143
144 /*
145 * MPALMOSTSAFE
146 */
147 int
148 sys_ogetdirentries(struct ogetdirentries_args *uap)
149 {
150 int error, bytes_transfered;
151 char *buf, *outbuf;
152 size_t len;
153 struct dirent *ndp;
154 struct odirent *destdp;
155 long base;
156
157 if (uap->count > 16384)
158 len = 16384;
159 else
160 len = uap->count;
161
162 buf = kmalloc(len, M_TEMP, M_WAITOK);
163
164 get_mplock();
165 error = kern_getdirentries(uap->fd, buf, len,
166 &base, &bytes_transfered, UIO_SYSSPACE);
167 rel_mplock();
168
169 if (error) {
170 kfree(buf, M_TEMP);
171 return(error);
172 }
173
174 ndp = (struct dirent *)buf;
175 outbuf = uap->buf;
176 destdp = kmalloc(PADDED_SIZE(MAX_NAMELEN), M_TEMP, M_WAITOK);
177
178 for (; (char *)ndp < buf + bytes_transfered; ndp = _DIRENT_NEXT(ndp)) {
179 if ((char *)_DIRENT_NEXT(ndp) > buf + bytes_transfered)
180 break;
181 if (ndp->d_namlen > MAX_NAMELEN)
182 continue;
183 destdp->od_fileno = ndp->d_ino;
184 #if BYTE_ORDER == LITTLE_ENDIAN
185 destdp->od_type = ndp->d_namlen;
186 destdp->od_namlen = ndp->d_type;
187 #else
188 destdp->od_type = ndp->d_type;
189 destdp->od_namlen = ndp->d_namlen;
190 #endif
191 destdp->od_reclen = PADDED_SIZE(destdp->od_namlen);
192 if (destdp->od_reclen > len)
193 break; /* XXX can not happen */
194 bcopy(ndp->d_name, destdp->od_name, destdp->od_namlen);
195 bzero(destdp->od_name + destdp->od_namlen,
196 PADDED_SIZE(destdp->od_namlen) - sizeof(*destdp) -
197 destdp->od_namlen);
198 error = copyout(destdp, outbuf,
199 PADDED_SIZE(destdp->od_namlen));
200 if (error)
201 break;
202 outbuf += PADDED_SIZE(destdp->od_namlen);
203 len -= PADDED_SIZE(destdp->od_namlen);
204 }
205
206 kfree(destdp, M_TEMP);
207 kfree(buf, M_TEMP);
208 uap->sysmsg_iresult = (int)(outbuf - uap->buf);
209 return (0);
210 }
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