Commit | Line | Data |
---|---|---|
7cdbcf53 | 1 | /* vfs_syscalls.c 4.11 81/08/12 */ |
d67a03eb BJ |
2 | |
3 | #include "../h/param.h" | |
4 | #include "../h/systm.h" | |
5 | #include "../h/mount.h" | |
6 | #include "../h/ino.h" | |
7 | #include "../h/reg.h" | |
8 | #include "../h/buf.h" | |
9 | #include "../h/filsys.h" | |
10 | #include "../h/dir.h" | |
11 | #include "../h/user.h" | |
12 | #include "../h/inode.h" | |
13 | #include "../h/file.h" | |
14 | #include "../h/conf.h" | |
15 | #include "../h/stat.h" | |
0737b714 | 16 | #include "../h/inline.h" |
d67a03eb BJ |
17 | |
18 | /* | |
19 | * the fstat system call. | |
20 | */ | |
21 | fstat() | |
22 | { | |
23 | register struct file *fp; | |
24 | register struct a { | |
25 | int fdes; | |
26 | struct stat *sb; | |
27 | } *uap; | |
28 | ||
29 | uap = (struct a *)u.u_ap; | |
30 | fp = getf(uap->fdes); | |
31 | if(fp == NULL) | |
32 | return; | |
a3aa7f92 BJ |
33 | if (fp->f_flag&FPORT) { |
34 | ptstat(fp); | |
35 | return; | |
36 | } | |
7cdbcf53 EC |
37 | #ifdef BBNNET |
38 | if (fp->f_flag&FNET) { | |
39 | u.u_error = EINVAL; | |
40 | return; | |
41 | } | |
42 | #endif | |
a3aa7f92 | 43 | stat1(fp->f_inode, uap->sb); |
d67a03eb BJ |
44 | } |
45 | ||
46 | /* | |
47 | * the stat system call. | |
48 | */ | |
49 | stat() | |
50 | { | |
51 | register struct inode *ip; | |
52 | register struct a { | |
53 | char *fname; | |
54 | struct stat *sb; | |
55 | } *uap; | |
56 | ||
57 | uap = (struct a *)u.u_ap; | |
58 | ip = namei(uchar, 0); | |
59 | if(ip == NULL) | |
60 | return; | |
a3aa7f92 | 61 | stat1(ip, uap->sb); |
d67a03eb BJ |
62 | iput(ip); |
63 | } | |
64 | ||
65 | /* | |
66 | * The basic routine for fstat and stat: | |
67 | * get the inode and pass appropriate parts back. | |
68 | */ | |
a3aa7f92 | 69 | stat1(ip, ub) |
d67a03eb BJ |
70 | register struct inode *ip; |
71 | struct stat *ub; | |
d67a03eb BJ |
72 | { |
73 | register struct dinode *dp; | |
74 | register struct buf *bp; | |
75 | struct stat ds; | |
76 | ||
c0bb1685 | 77 | IUPDAT(ip, &time, &time, 0); |
d67a03eb BJ |
78 | /* |
79 | * first copy from inode table | |
80 | */ | |
81 | ds.st_dev = ip->i_dev; | |
82 | ds.st_ino = ip->i_number; | |
83 | ds.st_mode = ip->i_mode; | |
84 | ds.st_nlink = ip->i_nlink; | |
85 | ds.st_uid = ip->i_uid; | |
86 | ds.st_gid = ip->i_gid; | |
87 | ds.st_rdev = (dev_t)ip->i_un.i_rdev; | |
a3aa7f92 | 88 | ds.st_size = ip->i_size; |
d67a03eb BJ |
89 | /* |
90 | * next the dates in the disk | |
91 | */ | |
92 | bp = bread(ip->i_dev, itod(ip->i_number)); | |
93 | dp = bp->b_un.b_dino; | |
94 | dp += itoo(ip->i_number); | |
95 | ds.st_atime = dp->di_atime; | |
96 | ds.st_mtime = dp->di_mtime; | |
97 | ds.st_ctime = dp->di_ctime; | |
98 | brelse(bp); | |
99 | if (copyout((caddr_t)&ds, (caddr_t)ub, sizeof(ds)) < 0) | |
100 | u.u_error = EFAULT; | |
101 | } | |
102 | ||
103 | /* | |
104 | * the dup system call. | |
105 | */ | |
106 | dup() | |
107 | { | |
108 | register struct file *fp; | |
109 | register struct a { | |
110 | int fdes; | |
111 | int fdes2; | |
112 | } *uap; | |
113 | register i, m; | |
114 | ||
115 | uap = (struct a *)u.u_ap; | |
116 | m = uap->fdes & ~077; | |
117 | uap->fdes &= 077; | |
118 | fp = getf(uap->fdes); | |
119 | if(fp == NULL) | |
120 | return; | |
121 | if ((m&0100) == 0) { | |
122 | if ((i = ufalloc()) < 0) | |
123 | return; | |
124 | } else { | |
125 | i = uap->fdes2; | |
126 | if (i<0 || i>=NOFILE) { | |
127 | u.u_error = EBADF; | |
128 | return; | |
129 | } | |
130 | if (u.u_vrpages[i]) { | |
131 | u.u_error = ETXTBSY; | |
132 | return; | |
133 | } | |
134 | u.u_r.r_val1 = i; | |
135 | } | |
136 | if (i!=uap->fdes) { | |
137 | if (u.u_ofile[i]!=NULL) | |
138 | closef(u.u_ofile[i]); | |
139 | u.u_ofile[i] = fp; | |
140 | fp->f_count++; | |
141 | } | |
142 | } | |
143 | ||
144 | /* | |
145 | * the mount system call. | |
146 | */ | |
1e608f17 | 147 | smount() { |
d67a03eb BJ |
148 | dev_t dev; |
149 | register struct inode *ip; | |
150 | register struct mount *mp; | |
151 | struct mount *smp; | |
152 | register struct filsys *fp; | |
153 | struct buf *bp; | |
154 | register struct a { | |
155 | char *fspec; | |
156 | char *freg; | |
157 | int ronly; | |
158 | } *uap; | |
1e608f17 | 159 | register char *cp; |
d67a03eb BJ |
160 | |
161 | uap = (struct a *)u.u_ap; | |
162 | dev = getmdev(); | |
163 | if(u.u_error) | |
164 | return; | |
165 | u.u_dirp = (caddr_t)uap->freg; | |
166 | ip = namei(uchar, 0); | |
167 | if(ip == NULL) | |
168 | return; | |
169 | if(ip->i_count!=1 || (ip->i_mode&(IFBLK&IFCHR))!=0) | |
170 | goto out; | |
171 | smp = NULL; | |
172 | for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++) { | |
173 | if(mp->m_bufp != NULL) { | |
174 | if(dev == mp->m_dev) | |
175 | goto out; | |
176 | } else | |
177 | if(smp == NULL) | |
178 | smp = mp; | |
179 | } | |
180 | mp = smp; | |
181 | if(mp == NULL) | |
182 | goto out; | |
183 | (*bdevsw[major(dev)].d_open)(dev, !uap->ronly); | |
184 | if(u.u_error) | |
185 | goto out; | |
186 | bp = bread(dev, SUPERB); | |
187 | if(u.u_error) { | |
188 | brelse(bp); | |
189 | goto out1; | |
190 | } | |
191 | mp->m_inodp = ip; | |
192 | mp->m_dev = dev; | |
2c3059b1 BJ |
193 | bp->b_flags |= B_LOCKED; |
194 | mp->m_bufp = bp; | |
195 | fp = bp->b_un.b_filsys; | |
d67a03eb BJ |
196 | fp->s_ilock = 0; |
197 | fp->s_flock = 0; | |
198 | fp->s_ronly = uap->ronly & 1; | |
199 | fp->s_nbehind = 0; | |
200 | fp->s_lasti = 1; | |
1e608f17 BJ |
201 | u.u_dirp = uap->freg; |
202 | for (cp = fp->s_fsmnt; cp < &fp->s_fsmnt[sizeof (fp->s_fsmnt) - 1]; ) | |
203 | if ((*cp++ = uchar()) == 0) | |
204 | u.u_dirp--; /* get 0 again */ | |
205 | *cp = 0; | |
d67a03eb BJ |
206 | brelse(bp); |
207 | ip->i_flag |= IMOUNT; | |
208 | prele(ip); | |
209 | return; | |
210 | ||
211 | out: | |
212 | u.u_error = EBUSY; | |
213 | out1: | |
214 | iput(ip); | |
215 | } | |
216 | ||
217 | /* | |
218 | * the umount system call. | |
219 | */ | |
220 | sumount() | |
221 | { | |
222 | dev_t dev; | |
223 | register struct inode *ip; | |
224 | register struct mount *mp; | |
225 | struct buf *bp; | |
2c3059b1 | 226 | int stillopen, flag; |
d67a03eb BJ |
227 | register struct a { |
228 | char *fspec; | |
229 | }; | |
230 | ||
231 | dev = getmdev(); | |
232 | if(u.u_error) | |
233 | return; | |
234 | xumount(dev); /* remove unused sticky files from text table */ | |
235 | update(); | |
236 | for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++) | |
237 | if(mp->m_bufp != NULL && dev == mp->m_dev) | |
238 | goto found; | |
239 | u.u_error = EINVAL; | |
240 | return; | |
241 | ||
242 | found: | |
9491f93d | 243 | stillopen = 0; |
75105cf0 | 244 | for(ip = inode; ip < inodeNINODE; ip++) |
2c3059b1 | 245 | if (ip->i_number != 0 && dev == ip->i_dev) { |
d67a03eb BJ |
246 | u.u_error = EBUSY; |
247 | return; | |
2c3059b1 BJ |
248 | } else if (ip->i_number != 0 && (ip->i_mode&IFMT) == IFBLK && |
249 | ip->i_un.i_rdev == dev) | |
250 | stillopen++; | |
d67a03eb BJ |
251 | ip = mp->m_inodp; |
252 | ip->i_flag &= ~IMOUNT; | |
253 | plock(ip); | |
254 | iput(ip); | |
2c3059b1 BJ |
255 | if ((bp = getblk(dev, SUPERB)) != mp->m_bufp) |
256 | panic("umount"); | |
257 | bp->b_flags &= ~B_LOCKED; | |
4a18fb8e | 258 | flag = !bp->b_un.b_filsys->s_ronly; |
d67a03eb BJ |
259 | mp->m_bufp = NULL; |
260 | brelse(bp); | |
aa250f32 | 261 | mpurge(mp - &mount[0]); |
4a18fb8e | 262 | if (!stillopen) { |
4a18fb8e RE |
263 | (*bdevsw[major(dev)].d_close)(dev, flag); |
264 | binval(dev); | |
265 | } | |
d67a03eb BJ |
266 | } |
267 | ||
268 | /* | |
269 | * Common code for mount and umount. | |
270 | * Check that the user's argument is a reasonable | |
271 | * thing on which to mount, and return the device number if so. | |
272 | */ | |
273 | dev_t | |
274 | getmdev() | |
275 | { | |
276 | dev_t dev; | |
277 | register struct inode *ip; | |
278 | ||
d67a03eb BJ |
279 | if (!suser()) |
280 | return(NODEV); | |
d67a03eb BJ |
281 | ip = namei(uchar, 0); |
282 | if(ip == NULL) | |
283 | return(NODEV); | |
284 | if((ip->i_mode&IFMT) != IFBLK) | |
285 | u.u_error = ENOTBLK; | |
286 | dev = (dev_t)ip->i_un.i_rdev; | |
287 | if(major(dev) >= nblkdev) | |
288 | u.u_error = ENXIO; | |
289 | iput(ip); | |
290 | return(dev); | |
291 | } |