Commit | Line | Data |
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a3aa7f92 | 1 | /* ffs_vnops.c 4.10 81/04/28 */ |
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 | } | |
37 | stat1(fp->f_inode, uap->sb); | |
d67a03eb BJ |
38 | } |
39 | ||
40 | /* | |
41 | * the stat system call. | |
42 | */ | |
43 | stat() | |
44 | { | |
45 | register struct inode *ip; | |
46 | register struct a { | |
47 | char *fname; | |
48 | struct stat *sb; | |
49 | } *uap; | |
50 | ||
51 | uap = (struct a *)u.u_ap; | |
52 | ip = namei(uchar, 0); | |
53 | if(ip == NULL) | |
54 | return; | |
a3aa7f92 | 55 | stat1(ip, uap->sb); |
d67a03eb BJ |
56 | iput(ip); |
57 | } | |
58 | ||
59 | /* | |
60 | * The basic routine for fstat and stat: | |
61 | * get the inode and pass appropriate parts back. | |
62 | */ | |
a3aa7f92 | 63 | stat1(ip, ub) |
d67a03eb BJ |
64 | register struct inode *ip; |
65 | struct stat *ub; | |
d67a03eb BJ |
66 | { |
67 | register struct dinode *dp; | |
68 | register struct buf *bp; | |
69 | struct stat ds; | |
70 | ||
c0bb1685 | 71 | IUPDAT(ip, &time, &time, 0); |
d67a03eb BJ |
72 | /* |
73 | * first copy from inode table | |
74 | */ | |
75 | ds.st_dev = ip->i_dev; | |
76 | ds.st_ino = ip->i_number; | |
77 | ds.st_mode = ip->i_mode; | |
78 | ds.st_nlink = ip->i_nlink; | |
79 | ds.st_uid = ip->i_uid; | |
80 | ds.st_gid = ip->i_gid; | |
81 | ds.st_rdev = (dev_t)ip->i_un.i_rdev; | |
a3aa7f92 | 82 | ds.st_size = ip->i_size; |
d67a03eb BJ |
83 | /* |
84 | * next the dates in the disk | |
85 | */ | |
86 | bp = bread(ip->i_dev, itod(ip->i_number)); | |
87 | dp = bp->b_un.b_dino; | |
88 | dp += itoo(ip->i_number); | |
89 | ds.st_atime = dp->di_atime; | |
90 | ds.st_mtime = dp->di_mtime; | |
91 | ds.st_ctime = dp->di_ctime; | |
92 | brelse(bp); | |
93 | if (copyout((caddr_t)&ds, (caddr_t)ub, sizeof(ds)) < 0) | |
94 | u.u_error = EFAULT; | |
95 | } | |
96 | ||
97 | /* | |
98 | * the dup system call. | |
99 | */ | |
100 | dup() | |
101 | { | |
102 | register struct file *fp; | |
103 | register struct a { | |
104 | int fdes; | |
105 | int fdes2; | |
106 | } *uap; | |
107 | register i, m; | |
108 | ||
109 | uap = (struct a *)u.u_ap; | |
110 | m = uap->fdes & ~077; | |
111 | uap->fdes &= 077; | |
112 | fp = getf(uap->fdes); | |
113 | if(fp == NULL) | |
114 | return; | |
115 | if ((m&0100) == 0) { | |
116 | if ((i = ufalloc()) < 0) | |
117 | return; | |
118 | } else { | |
119 | i = uap->fdes2; | |
120 | if (i<0 || i>=NOFILE) { | |
121 | u.u_error = EBADF; | |
122 | return; | |
123 | } | |
124 | if (u.u_vrpages[i]) { | |
125 | u.u_error = ETXTBSY; | |
126 | return; | |
127 | } | |
128 | u.u_r.r_val1 = i; | |
129 | } | |
130 | if (i!=uap->fdes) { | |
131 | if (u.u_ofile[i]!=NULL) | |
132 | closef(u.u_ofile[i]); | |
133 | u.u_ofile[i] = fp; | |
134 | fp->f_count++; | |
135 | } | |
136 | } | |
137 | ||
138 | /* | |
139 | * the mount system call. | |
140 | */ | |
1e608f17 | 141 | smount() { |
d67a03eb BJ |
142 | dev_t dev; |
143 | register struct inode *ip; | |
144 | register struct mount *mp; | |
145 | struct mount *smp; | |
146 | register struct filsys *fp; | |
147 | struct buf *bp; | |
148 | register struct a { | |
149 | char *fspec; | |
150 | char *freg; | |
151 | int ronly; | |
152 | } *uap; | |
1e608f17 | 153 | register char *cp; |
d67a03eb BJ |
154 | |
155 | uap = (struct a *)u.u_ap; | |
156 | dev = getmdev(); | |
157 | if(u.u_error) | |
158 | return; | |
159 | u.u_dirp = (caddr_t)uap->freg; | |
160 | ip = namei(uchar, 0); | |
161 | if(ip == NULL) | |
162 | return; | |
163 | if(ip->i_count!=1 || (ip->i_mode&(IFBLK&IFCHR))!=0) | |
164 | goto out; | |
165 | smp = NULL; | |
166 | for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++) { | |
167 | if(mp->m_bufp != NULL) { | |
168 | if(dev == mp->m_dev) | |
169 | goto out; | |
170 | } else | |
171 | if(smp == NULL) | |
172 | smp = mp; | |
173 | } | |
174 | mp = smp; | |
175 | if(mp == NULL) | |
176 | goto out; | |
177 | (*bdevsw[major(dev)].d_open)(dev, !uap->ronly); | |
178 | if(u.u_error) | |
179 | goto out; | |
180 | bp = bread(dev, SUPERB); | |
181 | if(u.u_error) { | |
182 | brelse(bp); | |
183 | goto out1; | |
184 | } | |
185 | mp->m_inodp = ip; | |
186 | mp->m_dev = dev; | |
2c3059b1 BJ |
187 | bp->b_flags |= B_LOCKED; |
188 | mp->m_bufp = bp; | |
189 | fp = bp->b_un.b_filsys; | |
d67a03eb BJ |
190 | fp->s_ilock = 0; |
191 | fp->s_flock = 0; | |
192 | fp->s_ronly = uap->ronly & 1; | |
193 | fp->s_nbehind = 0; | |
194 | fp->s_lasti = 1; | |
1e608f17 BJ |
195 | u.u_dirp = uap->freg; |
196 | for (cp = fp->s_fsmnt; cp < &fp->s_fsmnt[sizeof (fp->s_fsmnt) - 1]; ) | |
197 | if ((*cp++ = uchar()) == 0) | |
198 | u.u_dirp--; /* get 0 again */ | |
199 | *cp = 0; | |
d67a03eb BJ |
200 | brelse(bp); |
201 | ip->i_flag |= IMOUNT; | |
202 | prele(ip); | |
203 | return; | |
204 | ||
205 | out: | |
206 | u.u_error = EBUSY; | |
207 | out1: | |
208 | iput(ip); | |
209 | } | |
210 | ||
211 | /* | |
212 | * the umount system call. | |
213 | */ | |
214 | sumount() | |
215 | { | |
216 | dev_t dev; | |
217 | register struct inode *ip; | |
218 | register struct mount *mp; | |
219 | struct buf *bp; | |
2c3059b1 | 220 | int stillopen, flag; |
d67a03eb BJ |
221 | register struct a { |
222 | char *fspec; | |
223 | }; | |
224 | ||
225 | dev = getmdev(); | |
226 | if(u.u_error) | |
227 | return; | |
228 | xumount(dev); /* remove unused sticky files from text table */ | |
229 | update(); | |
230 | for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++) | |
231 | if(mp->m_bufp != NULL && dev == mp->m_dev) | |
232 | goto found; | |
233 | u.u_error = EINVAL; | |
234 | return; | |
235 | ||
236 | found: | |
9491f93d | 237 | stillopen = 0; |
75105cf0 | 238 | for(ip = inode; ip < inodeNINODE; ip++) |
2c3059b1 | 239 | if (ip->i_number != 0 && dev == ip->i_dev) { |
d67a03eb BJ |
240 | u.u_error = EBUSY; |
241 | return; | |
2c3059b1 BJ |
242 | } else if (ip->i_number != 0 && (ip->i_mode&IFMT) == IFBLK && |
243 | ip->i_un.i_rdev == dev) | |
244 | stillopen++; | |
d67a03eb BJ |
245 | ip = mp->m_inodp; |
246 | ip->i_flag &= ~IMOUNT; | |
247 | plock(ip); | |
248 | iput(ip); | |
2c3059b1 BJ |
249 | if ((bp = getblk(dev, SUPERB)) != mp->m_bufp) |
250 | panic("umount"); | |
251 | bp->b_flags &= ~B_LOCKED; | |
4a18fb8e | 252 | flag = !bp->b_un.b_filsys->s_ronly; |
d67a03eb BJ |
253 | mp->m_bufp = NULL; |
254 | brelse(bp); | |
aa250f32 | 255 | mpurge(mp - &mount[0]); |
4a18fb8e | 256 | if (!stillopen) { |
4a18fb8e RE |
257 | (*bdevsw[major(dev)].d_close)(dev, flag); |
258 | binval(dev); | |
259 | } | |
d67a03eb BJ |
260 | } |
261 | ||
262 | /* | |
263 | * Common code for mount and umount. | |
264 | * Check that the user's argument is a reasonable | |
265 | * thing on which to mount, and return the device number if so. | |
266 | */ | |
267 | dev_t | |
268 | getmdev() | |
269 | { | |
270 | dev_t dev; | |
271 | register struct inode *ip; | |
272 | ||
d67a03eb BJ |
273 | if (!suser()) |
274 | return(NODEV); | |
d67a03eb BJ |
275 | ip = namei(uchar, 0); |
276 | if(ip == NULL) | |
277 | return(NODEV); | |
278 | if((ip->i_mode&IFMT) != IFBLK) | |
279 | u.u_error = ENOTBLK; | |
280 | dev = (dev_t)ip->i_un.i_rdev; | |
281 | if(major(dev) >= nblkdev) | |
282 | u.u_error = ENXIO; | |
283 | iput(ip); | |
284 | return(dev); | |
285 | } |