Commit | Line | Data |
---|---|---|
cc15ab5d | 1 | /* lfs_vnops.c 4.13 81/11/14 */ |
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); | |
e92a04af | 31 | if (fp == NULL) |
d67a03eb | 32 | return; |
e92a04af | 33 | if (fp->f_flag & FSOCKET) |
cc15ab5d | 34 | u.u_error = sostat(fp->f_socket, uap->sb); |
e92a04af BJ |
35 | else |
36 | stat1(fp->f_inode, uap->sb); | |
d67a03eb BJ |
37 | } |
38 | ||
39 | /* | |
e92a04af | 40 | * Stat system call. |
d67a03eb BJ |
41 | */ |
42 | stat() | |
43 | { | |
44 | register struct inode *ip; | |
45 | register struct a { | |
46 | char *fname; | |
47 | struct stat *sb; | |
48 | } *uap; | |
49 | ||
50 | uap = (struct a *)u.u_ap; | |
51 | ip = namei(uchar, 0); | |
e92a04af | 52 | if (ip == NULL) |
d67a03eb | 53 | return; |
a3aa7f92 | 54 | stat1(ip, uap->sb); |
d67a03eb BJ |
55 | iput(ip); |
56 | } | |
57 | ||
58 | /* | |
59 | * The basic routine for fstat and stat: | |
60 | * get the inode and pass appropriate parts back. | |
61 | */ | |
a3aa7f92 | 62 | stat1(ip, ub) |
e92a04af BJ |
63 | register struct inode *ip; |
64 | struct stat *ub; | |
d67a03eb BJ |
65 | { |
66 | register struct dinode *dp; | |
67 | register struct buf *bp; | |
68 | struct stat ds; | |
69 | ||
c0bb1685 | 70 | IUPDAT(ip, &time, &time, 0); |
d67a03eb | 71 | /* |
e92a04af | 72 | * First copy from inode table |
d67a03eb BJ |
73 | */ |
74 | ds.st_dev = ip->i_dev; | |
75 | ds.st_ino = ip->i_number; | |
76 | ds.st_mode = ip->i_mode; | |
77 | ds.st_nlink = ip->i_nlink; | |
78 | ds.st_uid = ip->i_uid; | |
79 | ds.st_gid = ip->i_gid; | |
80 | ds.st_rdev = (dev_t)ip->i_un.i_rdev; | |
a3aa7f92 | 81 | ds.st_size = ip->i_size; |
d67a03eb | 82 | /* |
e92a04af | 83 | * Next the dates in the disk |
d67a03eb BJ |
84 | */ |
85 | bp = bread(ip->i_dev, itod(ip->i_number)); | |
86 | dp = bp->b_un.b_dino; | |
87 | dp += itoo(ip->i_number); | |
88 | ds.st_atime = dp->di_atime; | |
89 | ds.st_mtime = dp->di_mtime; | |
90 | ds.st_ctime = dp->di_ctime; | |
91 | brelse(bp); | |
92 | if (copyout((caddr_t)&ds, (caddr_t)ub, sizeof(ds)) < 0) | |
93 | u.u_error = EFAULT; | |
94 | } | |
95 | ||
96 | /* | |
e92a04af | 97 | * Dup system call. |
d67a03eb BJ |
98 | */ |
99 | dup() | |
100 | { | |
101 | register struct file *fp; | |
102 | register struct a { | |
103 | int fdes; | |
104 | int fdes2; | |
105 | } *uap; | |
106 | register i, m; | |
107 | ||
108 | uap = (struct a *)u.u_ap; | |
109 | m = uap->fdes & ~077; | |
110 | uap->fdes &= 077; | |
111 | fp = getf(uap->fdes); | |
e92a04af | 112 | if (fp == NULL) |
d67a03eb BJ |
113 | return; |
114 | if ((m&0100) == 0) { | |
115 | if ((i = ufalloc()) < 0) | |
116 | return; | |
117 | } else { | |
118 | i = uap->fdes2; | |
119 | if (i<0 || i>=NOFILE) { | |
120 | u.u_error = EBADF; | |
121 | return; | |
122 | } | |
d67a03eb BJ |
123 | u.u_r.r_val1 = i; |
124 | } | |
e92a04af | 125 | if (i != uap->fdes) { |
d67a03eb BJ |
126 | if (u.u_ofile[i]!=NULL) |
127 | closef(u.u_ofile[i]); | |
128 | u.u_ofile[i] = fp; | |
129 | fp->f_count++; | |
130 | } | |
131 | } | |
132 | ||
133 | /* | |
e92a04af | 134 | * Mount system call. |
d67a03eb | 135 | */ |
e92a04af BJ |
136 | smount() |
137 | { | |
d67a03eb BJ |
138 | dev_t dev; |
139 | register struct inode *ip; | |
140 | register struct mount *mp; | |
141 | struct mount *smp; | |
142 | register struct filsys *fp; | |
143 | struct buf *bp; | |
144 | register struct a { | |
145 | char *fspec; | |
146 | char *freg; | |
147 | int ronly; | |
148 | } *uap; | |
1e608f17 | 149 | register char *cp; |
d67a03eb BJ |
150 | |
151 | uap = (struct a *)u.u_ap; | |
152 | dev = getmdev(); | |
e92a04af | 153 | if (u.u_error) |
d67a03eb BJ |
154 | return; |
155 | u.u_dirp = (caddr_t)uap->freg; | |
156 | ip = namei(uchar, 0); | |
e92a04af | 157 | if (ip == NULL) |
d67a03eb | 158 | return; |
e92a04af | 159 | if (ip->i_count!=1 || (ip->i_mode&IFMT) != IFDIR) |
d67a03eb BJ |
160 | goto out; |
161 | smp = NULL; | |
e92a04af BJ |
162 | for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++) { |
163 | if (mp->m_bufp != NULL) { | |
164 | if (dev == mp->m_dev) | |
d67a03eb BJ |
165 | goto out; |
166 | } else | |
e92a04af | 167 | if (smp == NULL) |
d67a03eb BJ |
168 | smp = mp; |
169 | } | |
170 | mp = smp; | |
e92a04af | 171 | if (mp == NULL) |
d67a03eb BJ |
172 | goto out; |
173 | (*bdevsw[major(dev)].d_open)(dev, !uap->ronly); | |
e92a04af | 174 | if (u.u_error) |
d67a03eb BJ |
175 | goto out; |
176 | bp = bread(dev, SUPERB); | |
e92a04af | 177 | if (u.u_error) { |
d67a03eb BJ |
178 | brelse(bp); |
179 | goto out1; | |
180 | } | |
181 | mp->m_inodp = ip; | |
182 | mp->m_dev = dev; | |
2c3059b1 BJ |
183 | bp->b_flags |= B_LOCKED; |
184 | mp->m_bufp = bp; | |
185 | fp = bp->b_un.b_filsys; | |
d67a03eb BJ |
186 | fp->s_ilock = 0; |
187 | fp->s_flock = 0; | |
188 | fp->s_ronly = uap->ronly & 1; | |
189 | fp->s_nbehind = 0; | |
190 | fp->s_lasti = 1; | |
1e608f17 BJ |
191 | u.u_dirp = uap->freg; |
192 | for (cp = fp->s_fsmnt; cp < &fp->s_fsmnt[sizeof (fp->s_fsmnt) - 1]; ) | |
193 | if ((*cp++ = uchar()) == 0) | |
194 | u.u_dirp--; /* get 0 again */ | |
195 | *cp = 0; | |
d67a03eb BJ |
196 | brelse(bp); |
197 | ip->i_flag |= IMOUNT; | |
e92a04af | 198 | irele(ip); |
d67a03eb BJ |
199 | return; |
200 | ||
201 | out: | |
202 | u.u_error = EBUSY; | |
203 | out1: | |
204 | iput(ip); | |
205 | } | |
206 | ||
207 | /* | |
208 | * the umount system call. | |
209 | */ | |
210 | sumount() | |
211 | { | |
212 | dev_t dev; | |
213 | register struct inode *ip; | |
214 | register struct mount *mp; | |
215 | struct buf *bp; | |
2c3059b1 | 216 | int stillopen, flag; |
d67a03eb BJ |
217 | register struct a { |
218 | char *fspec; | |
219 | }; | |
220 | ||
221 | dev = getmdev(); | |
e92a04af | 222 | if (u.u_error) |
d67a03eb BJ |
223 | return; |
224 | xumount(dev); /* remove unused sticky files from text table */ | |
225 | update(); | |
e92a04af BJ |
226 | for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++) |
227 | if (mp->m_bufp != NULL && dev == mp->m_dev) | |
d67a03eb BJ |
228 | goto found; |
229 | u.u_error = EINVAL; | |
230 | return; | |
231 | ||
232 | found: | |
9491f93d | 233 | stillopen = 0; |
e92a04af | 234 | for (ip = inode; ip < inodeNINODE; ip++) |
2c3059b1 | 235 | if (ip->i_number != 0 && dev == ip->i_dev) { |
d67a03eb BJ |
236 | u.u_error = EBUSY; |
237 | return; | |
2c3059b1 BJ |
238 | } else if (ip->i_number != 0 && (ip->i_mode&IFMT) == IFBLK && |
239 | ip->i_un.i_rdev == dev) | |
240 | stillopen++; | |
d67a03eb BJ |
241 | ip = mp->m_inodp; |
242 | ip->i_flag &= ~IMOUNT; | |
e92a04af | 243 | ilock(ip); |
d67a03eb | 244 | iput(ip); |
2c3059b1 BJ |
245 | if ((bp = getblk(dev, SUPERB)) != mp->m_bufp) |
246 | panic("umount"); | |
247 | bp->b_flags &= ~B_LOCKED; | |
4a18fb8e | 248 | flag = !bp->b_un.b_filsys->s_ronly; |
d67a03eb BJ |
249 | mp->m_bufp = NULL; |
250 | brelse(bp); | |
aa250f32 | 251 | mpurge(mp - &mount[0]); |
4a18fb8e | 252 | if (!stillopen) { |
4a18fb8e RE |
253 | (*bdevsw[major(dev)].d_close)(dev, flag); |
254 | binval(dev); | |
255 | } | |
d67a03eb BJ |
256 | } |
257 | ||
258 | /* | |
259 | * Common code for mount and umount. | |
260 | * Check that the user's argument is a reasonable | |
261 | * thing on which to mount, and return the device number if so. | |
262 | */ | |
263 | dev_t | |
264 | getmdev() | |
265 | { | |
266 | dev_t dev; | |
267 | register struct inode *ip; | |
268 | ||
d67a03eb BJ |
269 | if (!suser()) |
270 | return(NODEV); | |
d67a03eb | 271 | ip = namei(uchar, 0); |
e92a04af | 272 | if (ip == NULL) |
d67a03eb | 273 | return(NODEV); |
e92a04af | 274 | if ((ip->i_mode&IFMT) != IFBLK) |
d67a03eb BJ |
275 | u.u_error = ENOTBLK; |
276 | dev = (dev_t)ip->i_un.i_rdev; | |
e92a04af | 277 | if (major(dev) >= nblkdev) |
d67a03eb BJ |
278 | u.u_error = ENXIO; |
279 | iput(ip); | |
280 | return(dev); | |
281 | } |