1 /*-
2 * Copyright (c) 1994-1995 Søren Schmidt
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software withough specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/dirent.h>
34 #include <sys/file.h>
35 #include <sys/filedesc.h>
36 #include <sys/proc.h>
37 #include <sys/mount.h>
38 #include <sys/namei.h>
39 #include <sys/socketvar.h>
40 #include <sys/stat.h>
41 #include <sys/vnode.h>
42 #include <sys/pipe.h>
43
44 #include <i386/linux/linux.h>
45 #include <i386/linux/linux_proto.h>
46 #include <i386/linux/linux_util.h>
47
48 struct linux_newstat {
49 unsigned short stat_dev;
50 unsigned short __pad1;
51 unsigned long stat_ino;
52 unsigned short stat_mode;
53 unsigned short stat_nlink;
54 unsigned short stat_uid;
55 unsigned short stat_gid;
56 unsigned short stat_rdev;
57 unsigned short __pad2;
58 unsigned long stat_size;
59 unsigned long stat_blksize;
60 unsigned long stat_blocks;
61 unsigned long stat_atime;
62 unsigned long __unused1;
63 unsigned long stat_mtime;
64 unsigned long __unused2;
65 unsigned long stat_ctime;
66 unsigned long __unused3;
67 unsigned long __unused4;
68 unsigned long __unused5;
69 };
70
71 struct linux_ustat
72 {
73 int f_tfree;
74 u_long f_tinode;
75 char f_fname[6];
76 char f_fpack[6];
77 };
78
79 static int
80 newstat_copyout(struct stat *buf, void *ubuf)
81 {
82 struct linux_newstat tbuf;
83
84 tbuf.stat_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
85 tbuf.stat_ino = buf->st_ino;
86 tbuf.stat_mode = buf->st_mode;
87 tbuf.stat_nlink = buf->st_nlink;
88 tbuf.stat_uid = buf->st_uid;
89 tbuf.stat_gid = buf->st_gid;
90 tbuf.stat_rdev = buf->st_rdev;
91 tbuf.stat_size = buf->st_size;
92 tbuf.stat_atime = buf->st_atime;
93 tbuf.stat_mtime = buf->st_mtime;
94 tbuf.stat_ctime = buf->st_ctime;
95 tbuf.stat_blksize = buf->st_blksize;
96 tbuf.stat_blocks = buf->st_blocks;
97
98 return copyout(&tbuf, ubuf, sizeof(tbuf));
99 }
100
101 int
102 linux_newstat(struct proc *p, struct linux_newstat_args *args)
103 {
104 struct stat buf;
105 struct nameidata nd;
106 int error;
107 caddr_t sg;
108
109 sg = stackgap_init();
110 CHECKALTEXIST(p, &sg, args->path);
111
112 #ifdef DEBUG
113 printf("Linux-emul(%ld): newstat(%s, *)\n", (long)p->p_pid,
114 args->path);
115 #endif
116
117 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
118 args->path, p);
119 error = namei(&nd);
120 if (error)
121 return (error);
122
123 error = vn_stat(nd.ni_vp, &buf, p);
124 vput(nd.ni_vp);
125 if (error)
126 return (error);
127
128 return (newstat_copyout(&buf, args->buf));
129 }
130
131 /*
132 * Get file status; this version does not follow links.
133 */
134 int
135 linux_newlstat(p, uap)
136 struct proc *p;
137 struct linux_newlstat_args *uap;
138 {
139 int error;
140 struct vnode *vp;
141 struct stat sb;
142 struct nameidata nd;
143 caddr_t sg;
144
145 sg = stackgap_init();
146 CHECKALTEXIST(p, &sg, uap->path);
147
148 #ifdef DEBUG
149 printf("Linux-emul(%ld): newlstat(%s, *)\n", (long)p->p_pid,
150 uap->path);
151 #endif
152
153 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
154 uap->path, p);
155 error = namei(&nd);
156 if (error)
157 return (error);
158
159 vp = nd.ni_vp;
160 error = vn_stat(vp, &sb, p);
161 vput(vp);
162 if (error)
163 return (error);
164
165 return (newstat_copyout(&sb, uap->buf));
166 }
167
168 int
169 linux_newfstat(struct proc *p, struct linux_newfstat_args *args)
170 {
171 struct filedesc *fdp = p->p_fd;
172 struct file *fp;
173 struct stat buf;
174 int error;
175
176 #ifdef DEBUG
177 printf("Linux-emul(%d): newfstat(%d, *)\n", p->p_pid, args->fd);
178 #endif
179 if ((unsigned)args->fd >= fdp->fd_nfiles
180 || (fp = fdp->fd_ofiles[args->fd]) == NULL)
181 return EBADF;
182 switch (fp->f_type) {
183 case DTYPE_FIFO:
184 case DTYPE_VNODE:
185 error = vn_stat((struct vnode *)fp->f_data, &buf, p);
186 break;
187 case DTYPE_SOCKET:
188 error = soo_stat((struct socket *)fp->f_data, &buf);
189 break;
190 case DTYPE_PIPE:
191 error = pipe_stat((struct pipe *)fp->f_data, &buf);
192 break;
193 default:
194 panic("LINUX newfstat");
195 }
196 if (!error)
197 error = newstat_copyout(&buf, args->buf);
198 return error;
199 }
200
201 struct linux_statfs_buf {
202 long ftype;
203 long fbsize;
204 long fblocks;
205 long fbfree;
206 long fbavail;
207 long ffiles;
208 long fffree;
209 linux_fsid_t ffsid;
210 long fnamelen;
211 long fspare[6];
212 };
213
214 int
215 linux_statfs(struct proc *p, struct linux_statfs_args *args)
216 {
217 struct mount *mp;
218 struct nameidata *ndp;
219 struct statfs *bsd_statfs;
220 struct nameidata nd;
221 struct linux_statfs_buf linux_statfs_buf;
222 int error;
223 caddr_t sg;
224
225 sg = stackgap_init();
226 CHECKALTEXIST(p, &sg, args->path);
227
228 #ifdef DEBUG
229 printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path);
230 #endif
231 ndp = &nd;
232 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args->path, curproc);
233 if (error = namei(ndp))
234 return error;
235 mp = ndp->ni_vp->v_mount;
236 bsd_statfs = &mp->mnt_stat;
237 vrele(ndp->ni_vp);
238 if (error = VFS_STATFS(mp, bsd_statfs, p))
239 return error;
240 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
241 linux_statfs_buf.ftype = bsd_statfs->f_type;
242 linux_statfs_buf.fbsize = bsd_statfs->f_bsize;
243 linux_statfs_buf.fblocks = bsd_statfs->f_blocks;
244 linux_statfs_buf.fbfree = bsd_statfs->f_bfree;
245 linux_statfs_buf.fbavail = bsd_statfs->f_bavail;
246 linux_statfs_buf.fffree = bsd_statfs->f_ffree;
247 linux_statfs_buf.ffiles = bsd_statfs->f_files;
248 linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
249 linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
250 linux_statfs_buf.fnamelen = MAXNAMLEN;
251 return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf,
252 sizeof(struct linux_statfs_buf));
253 }
254
255 int
256 linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args)
257 {
258 struct file *fp;
259 struct mount *mp;
260 struct statfs *bsd_statfs;
261 struct linux_statfs_buf linux_statfs_buf;
262 int error;
263
264 #ifdef DEBUG
265 printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd);
266 #endif
267 if (error = getvnode(p->p_fd, args->fd, &fp))
268 return error;
269 mp = ((struct vnode *)fp->f_data)->v_mount;
270 bsd_statfs = &mp->mnt_stat;
271 if (error = VFS_STATFS(mp, bsd_statfs, p))
272 return error;
273 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
274 linux_statfs_buf.ftype = bsd_statfs->f_type;
275 linux_statfs_buf.fbsize = bsd_statfs->f_bsize;
276 linux_statfs_buf.fblocks = bsd_statfs->f_blocks;
277 linux_statfs_buf.fbfree = bsd_statfs->f_bfree;
278 linux_statfs_buf.fbavail = bsd_statfs->f_bavail;
279 linux_statfs_buf.fffree = bsd_statfs->f_ffree;
280 linux_statfs_buf.ffiles = bsd_statfs->f_files;
281 linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
282 linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
283 linux_statfs_buf.fnamelen = MAXNAMLEN;
284 return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf,
285 sizeof(struct linux_statfs_buf));
286 }
287
288 int
289 linux_ustat(p, uap)
290 struct proc *p;
291 struct linux_ustat_args *uap;
292 {
293 struct linux_ustat lu;
294 dev_t dev;
295 struct vnode *vp;
296 struct statfs *stat;
297 int error;
298
299 #ifdef DEBUG
300 printf("Linux-emul(%ld): ustat(%d, *)\n", (long)p->p_pid, uap->dev);
301 #endif
302
303 /*
304 * lu.f_fname and lu.f_fpack are not used. They are always zeroed.
305 * lu.f_tinode and lu.f_tfree are set from the device's super block.
306 */
307 bzero(&lu, sizeof(lu));
308
309 /*
310 * XXX - Don't return an error if we can't find a vnode for the
311 * device. Our dev_t is 32-bits whereas Linux only has a 16-bits
312 * dev_t. The dev_t that is used now may as well be a truncated
313 * dev_t returned from previous syscalls. Just return a bzeroed
314 * ustat in that case.
315 */
316 dev = makedev(uap->dev >> 8, uap->dev & 0xFF);
317 if (vfinddev(dev, VBLK, &vp)) {
318 if (vp->v_mount == NULL)
319 return (EINVAL);
320 stat = &(vp->v_mount->mnt_stat);
321 error = VFS_STATFS(vp->v_mount, stat, p);
322 if (error)
323 return (error);
324
325 lu.f_tfree = stat->f_bfree;
326 lu.f_tinode = stat->f_ffree;
327 }
328
329 return (copyout(&lu, uap->ubuf, sizeof(lu)));
330 }
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