Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
7188ac27 KM |
2 | * Copyright (c) 1982, 1986, 1989 Regents of the University of California. |
3 | * All rights reserved. | |
da7c5cc6 | 4 | * |
b702c21d | 5 | * %sccs.include.redist.c% |
7188ac27 | 6 | * |
d7961b1d | 7 | * @(#)ufs_vnops.c 7.74 (Berkeley) %G% |
da7c5cc6 | 8 | */ |
6459ebe0 | 9 | |
031fd966 KB |
10 | #include <sys/param.h> |
11 | #include <sys/systm.h> | |
12 | #include <sys/namei.h> | |
13 | #include <sys/resourcevar.h> | |
14 | #include <sys/kernel.h> | |
15 | #include <sys/file.h> | |
16 | #include <sys/stat.h> | |
17 | #include <sys/buf.h> | |
18 | #include <sys/proc.h> | |
19 | #include <sys/conf.h> | |
20 | #include <sys/mount.h> | |
21 | #include <sys/vnode.h> | |
22 | #include <sys/specdev.h> | |
23 | #include <sys/fifo.h> | |
24 | #include <sys/malloc.h> | |
25 | ||
26 | #include <ufs/ufs/lockf.h> | |
27 | #include <ufs/ufs/quota.h> | |
28 | #include <ufs/ufs/inode.h> | |
29 | #include <ufs/ufs/dir.h> | |
30 | #include <ufs/ufs/ufsmount.h> | |
31 | #include <ufs/ufs/ufs_extern.h> | |
32 | ||
1a3cb193 KM |
33 | int ufs_chmod __P((struct vnode *, int, struct proc *)); |
34 | int ufs_chown __P((struct vnode *, u_int, u_int, struct proc *)); | |
031fd966 | 35 | |
031fd966 KB |
36 | enum vtype iftovt_tab[16] = { |
37 | VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, | |
38 | VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, | |
39 | }; | |
40 | int vttoif_tab[9] = { | |
41 | 0, IFREG, IFDIR, IFBLK, IFCHR, IFLNK, IFSOCK, IFIFO, IFMT, | |
42 | }; | |
3e78e260 | 43 | |
1a3cb193 KM |
44 | #ifdef _NOQUAD |
45 | #define SETHIGH(q, h) (q).val[_QUAD_HIGHWORD] = (h) | |
46 | #define SETLOW(q, l) (q).val[_QUAD_LOWWORD] = (l) | |
47 | #else /* QUAD */ | |
48 | union _qcvt { | |
49 | quad_t qcvt; | |
50 | long val[2]; | |
51 | }; | |
52 | #define SETHIGH(q, h) { \ | |
53 | union _qcvt tmp; \ | |
54 | tmp.qcvt = (q); \ | |
55 | tmp.val[_QUAD_HIGHWORD] = (h); \ | |
56 | (q) = tmp.qcvt; \ | |
57 | } | |
58 | #define SETLOW(q, l) { \ | |
59 | union _qcvt tmp; \ | |
60 | tmp.qcvt = (q); \ | |
61 | tmp.val[_QUAD_LOWWORD] = (l); \ | |
62 | (q) = tmp.qcvt; \ | |
63 | } | |
64 | #endif /* QUAD */ | |
65 | ||
4f083fd7 | 66 | /* |
7188ac27 | 67 | * Create a regular file |
4f083fd7 | 68 | */ |
031fd966 | 69 | int |
6e57e9ff | 70 | ufs_create(dvp, vpp, cnp, vap) |
cfef4373 JH |
71 | struct vnode *dvp; |
72 | struct vnode **vpp; | |
73 | struct componentname *cnp; | |
7188ac27 | 74 | struct vattr *vap; |
3e78e260 | 75 | { |
7188ac27 | 76 | int error; |
3e78e260 | 77 | |
031fd966 | 78 | if (error = |
cfef4373 | 79 | ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), dvp, vpp, cnp)) |
7188ac27 | 80 | return (error); |
7188ac27 | 81 | return (0); |
3e78e260 BJ |
82 | } |
83 | ||
4f083fd7 | 84 | /* |
7188ac27 | 85 | * Mknod vnode call |
4f083fd7 | 86 | */ |
7188ac27 | 87 | /* ARGSUSED */ |
031fd966 | 88 | int |
6e57e9ff | 89 | ufs_mknod(dvp, vpp, cnp, vap) |
cfef4373 JH |
90 | struct vnode *dvp; |
91 | struct vnode **vpp; | |
92 | struct componentname *cnp; | |
7188ac27 | 93 | struct vattr *vap; |
3e78e260 | 94 | { |
c59af027 | 95 | register struct inode *ip; |
7188ac27 | 96 | int error; |
3e78e260 | 97 | |
031fd966 | 98 | if (error = |
cfef4373 | 99 | ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), dvp, vpp, cnp)) |
7188ac27 | 100 | return (error); |
cfef4373 | 101 | ip = VTOI(*vpp); |
d1c43d7f KM |
102 | ip->i_flag |= IACC|IUPD|ICHG; |
103 | if (vap->va_rdev != VNOVAL) { | |
7188ac27 KM |
104 | /* |
105 | * Want to be able to use this to make badblock | |
106 | * inodes, so don't truncate the dev number. | |
107 | */ | |
b373e060 | 108 | ip->i_rdev = vap->va_rdev; |
7188ac27 | 109 | } |
7188ac27 KM |
110 | /* |
111 | * Remove inode so that it will be reloaded by iget and | |
112 | * checked to see if it is an alias of an existing entry | |
113 | * in the inode cache. | |
114 | */ | |
cfef4373 JH |
115 | vput(*vpp); |
116 | (*vpp)->v_type = VNON; | |
117 | vgone(*vpp); | |
118 | *vpp = 0; | |
7188ac27 | 119 | return (0); |
3e78e260 BJ |
120 | } |
121 | ||
122 | /* | |
7188ac27 KM |
123 | * Open called. |
124 | * | |
125 | * Nothing to do. | |
3e78e260 | 126 | */ |
7188ac27 | 127 | /* ARGSUSED */ |
031fd966 | 128 | int |
5b169cb7 | 129 | ufs_open(vp, mode, cred, p) |
7188ac27 KM |
130 | struct vnode *vp; |
131 | int mode; | |
132 | struct ucred *cred; | |
5b169cb7 | 133 | struct proc *p; |
3e78e260 | 134 | { |
3e78e260 | 135 | |
7188ac27 | 136 | return (0); |
3e78e260 BJ |
137 | } |
138 | ||
139 | /* | |
7188ac27 KM |
140 | * Close called |
141 | * | |
142 | * Update the times on the inode. | |
3e78e260 | 143 | */ |
7188ac27 | 144 | /* ARGSUSED */ |
031fd966 | 145 | int |
5b169cb7 | 146 | ufs_close(vp, fflag, cred, p) |
7188ac27 KM |
147 | struct vnode *vp; |
148 | int fflag; | |
149 | struct ucred *cred; | |
5b169cb7 | 150 | struct proc *p; |
3e78e260 | 151 | { |
031fd966 | 152 | register struct inode *ip; |
3e78e260 | 153 | |
031fd966 | 154 | ip = VTOI(vp); |
de67eefc | 155 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
7188ac27 KM |
156 | ITIMES(ip, &time, &time); |
157 | return (0); | |
3e78e260 BJ |
158 | } |
159 | ||
4b61628b KM |
160 | /* |
161 | * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. | |
162 | * The mode is shifted to select the owner/group/other fields. The | |
163 | * super user is granted all permissions. | |
164 | */ | |
031fd966 | 165 | int |
5b169cb7 | 166 | ufs_access(vp, mode, cred, p) |
7188ac27 | 167 | struct vnode *vp; |
4b61628b | 168 | register int mode; |
7188ac27 | 169 | struct ucred *cred; |
5b169cb7 | 170 | struct proc *p; |
3e78e260 | 171 | { |
4b61628b KM |
172 | register struct inode *ip = VTOI(vp); |
173 | register gid_t *gp; | |
174 | int i, error; | |
3e78e260 | 175 | |
4b61628b KM |
176 | #ifdef DIAGNOSTIC |
177 | if (!VOP_ISLOCKED(vp)) { | |
178 | vprint("ufs_access: not locked", vp); | |
179 | panic("ufs_access: not locked"); | |
180 | } | |
181 | #endif | |
182 | #ifdef QUOTA | |
183 | if (mode & VWRITE) { | |
184 | switch (vp->v_type) { | |
185 | case VREG: case VDIR: case VLNK: | |
186 | if (error = getinoquota(ip)) | |
187 | return (error); | |
188 | } | |
189 | } | |
190 | #endif /* QUOTA */ | |
191 | /* | |
192 | * If you're the super-user, you always get access. | |
193 | */ | |
194 | if (cred->cr_uid == 0) | |
195 | return (0); | |
196 | /* | |
197 | * Access check is based on only one of owner, group, public. | |
198 | * If not owner, then check group. If not a member of the | |
199 | * group, then check public access. | |
200 | */ | |
201 | if (cred->cr_uid != ip->i_uid) { | |
202 | mode >>= 3; | |
203 | gp = cred->cr_groups; | |
204 | for (i = 0; i < cred->cr_ngroups; i++, gp++) | |
205 | if (ip->i_gid == *gp) | |
206 | goto found; | |
207 | mode >>= 3; | |
208 | found: | |
209 | ; | |
210 | } | |
211 | if ((ip->i_mode & mode) != 0) | |
212 | return (0); | |
213 | return (EACCES); | |
3e78e260 BJ |
214 | } |
215 | ||
7188ac27 | 216 | /* ARGSUSED */ |
031fd966 | 217 | int |
5b169cb7 | 218 | ufs_getattr(vp, vap, cred, p) |
7188ac27 KM |
219 | struct vnode *vp; |
220 | register struct vattr *vap; | |
221 | struct ucred *cred; | |
5b169cb7 | 222 | struct proc *p; |
3e78e260 | 223 | { |
031fd966 | 224 | register struct inode *ip; |
3e78e260 | 225 | |
031fd966 | 226 | ip = VTOI(vp); |
7188ac27 | 227 | ITIMES(ip, &time, &time); |
3e78e260 | 228 | /* |
7188ac27 | 229 | * Copy from inode table |
3e78e260 | 230 | */ |
7188ac27 KM |
231 | vap->va_fsid = ip->i_dev; |
232 | vap->va_fileid = ip->i_number; | |
233 | vap->va_mode = ip->i_mode & ~IFMT; | |
234 | vap->va_nlink = ip->i_nlink; | |
235 | vap->va_uid = ip->i_uid; | |
236 | vap->va_gid = ip->i_gid; | |
237 | vap->va_rdev = (dev_t)ip->i_rdev; | |
4b61628b KM |
238 | #ifdef tahoe |
239 | vap->va_size = ip->i_size; | |
240 | vap->va_size_rsv = 0; | |
241 | #else | |
8fae943a | 242 | vap->va_qsize = ip->i_din.di_qsize; |
4b61628b | 243 | #endif |
7188ac27 | 244 | vap->va_atime.tv_sec = ip->i_atime; |
6ef53d70 | 245 | vap->va_atime.tv_usec = 0; |
7188ac27 | 246 | vap->va_mtime.tv_sec = ip->i_mtime; |
6ef53d70 | 247 | vap->va_mtime.tv_usec = 0; |
7188ac27 | 248 | vap->va_ctime.tv_sec = ip->i_ctime; |
6ef53d70 | 249 | vap->va_ctime.tv_usec = 0; |
d07fc92a KM |
250 | vap->va_flags = ip->i_flags; |
251 | vap->va_gen = ip->i_gen; | |
7188ac27 KM |
252 | /* this doesn't belong here */ |
253 | if (vp->v_type == VBLK) | |
254 | vap->va_blocksize = BLKDEV_IOSIZE; | |
255 | else if (vp->v_type == VCHR) | |
256 | vap->va_blocksize = MAXBSIZE; | |
8eee8525 | 257 | else |
cc173077 | 258 | vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; |
a61a68d6 | 259 | vap->va_bytes = dbtob(ip->i_blocks); |
1a3cb193 | 260 | #ifdef _NOQUAD |
8fae943a | 261 | vap->va_bytes_rsv = 0; |
1a3cb193 | 262 | #endif |
7188ac27 | 263 | vap->va_type = vp->v_type; |
1a3cb193 | 264 | vap->va_filerev = ip->i_modrev; |
7188ac27 | 265 | return (0); |
3e78e260 BJ |
266 | } |
267 | ||
268 | /* | |
7188ac27 | 269 | * Set attribute vnode op. called from several syscalls |
3e78e260 | 270 | */ |
031fd966 | 271 | int |
5b169cb7 | 272 | ufs_setattr(vp, vap, cred, p) |
7188ac27 KM |
273 | register struct vnode *vp; |
274 | register struct vattr *vap; | |
275 | register struct ucred *cred; | |
5b169cb7 | 276 | struct proc *p; |
3e78e260 | 277 | { |
031fd966 | 278 | register struct inode *ip; |
031fd966 | 279 | int error; |
b4d1aee9 | 280 | |
7188ac27 | 281 | /* |
031fd966 | 282 | * Check for unsettable attributes. |
7188ac27 KM |
283 | */ |
284 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || | |
285 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || | |
286 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || | |
d07fc92a | 287 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
7188ac27 | 288 | return (EINVAL); |
b4d1aee9 | 289 | } |
7188ac27 KM |
290 | /* |
291 | * Go through the fields and update iff not VNOVAL. | |
292 | */ | |
293 | if (vap->va_uid != (u_short)VNOVAL || vap->va_gid != (u_short)VNOVAL) | |
031fd966 | 294 | if (error = ufs_chown(vp, vap->va_uid, vap->va_gid, p)) |
7188ac27 KM |
295 | return (error); |
296 | if (vap->va_size != VNOVAL) { | |
297 | if (vp->v_type == VDIR) | |
298 | return (EISDIR); | |
c59af027 | 299 | if (error = VOP_TRUNCATE(vp, vap->va_size, 0)) /* IO_SYNC? */ |
7188ac27 | 300 | return (error); |
3e78e260 | 301 | } |
c59af027 | 302 | ip = VTOI(vp); |
7188ac27 | 303 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { |
de412887 | 304 | if (cred->cr_uid != ip->i_uid && |
c6f5111d | 305 | (error = suser(cred, &p->p_acflag))) |
de412887 | 306 | return (error); |
7188ac27 KM |
307 | if (vap->va_atime.tv_sec != VNOVAL) |
308 | ip->i_flag |= IACC; | |
309 | if (vap->va_mtime.tv_sec != VNOVAL) | |
310 | ip->i_flag |= IUPD; | |
311 | ip->i_flag |= ICHG; | |
c59af027 | 312 | if (error = VOP_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 1)) |
7188ac27 | 313 | return (error); |
5485e062 | 314 | } |
031fd966 | 315 | error = 0; |
7188ac27 | 316 | if (vap->va_mode != (u_short)VNOVAL) |
031fd966 | 317 | error = ufs_chmod(vp, (int)vap->va_mode, p); |
d07fc92a KM |
318 | if (vap->va_flags != VNOVAL) { |
319 | if (cred->cr_uid != ip->i_uid && | |
c6f5111d | 320 | (error = suser(cred, &p->p_acflag))) |
d07fc92a KM |
321 | return (error); |
322 | if (cred->cr_uid == 0) { | |
323 | ip->i_flags = vap->va_flags; | |
324 | } else { | |
325 | ip->i_flags &= 0xffff0000; | |
326 | ip->i_flags |= (vap->va_flags & 0xffff); | |
327 | } | |
328 | ip->i_flag |= ICHG; | |
329 | } | |
7188ac27 | 330 | return (error); |
528f664c SL |
331 | } |
332 | ||
4f083fd7 SL |
333 | /* |
334 | * Change the mode on a file. | |
335 | * Inode must be locked before calling. | |
336 | */ | |
ca3e8b68 | 337 | static int |
031fd966 | 338 | ufs_chmod(vp, mode, p) |
7188ac27 | 339 | register struct vnode *vp; |
528f664c | 340 | register int mode; |
c6f5111d | 341 | struct proc *p; |
528f664c | 342 | { |
c6f5111d | 343 | register struct ucred *cred = p->p_ucred; |
7188ac27 | 344 | register struct inode *ip = VTOI(vp); |
de412887 | 345 | int error; |
197da11b | 346 | |
de412887 | 347 | if (cred->cr_uid != ip->i_uid && |
c6f5111d | 348 | (error = suser(cred, &p->p_acflag))) |
de412887 | 349 | return (error); |
7188ac27 | 350 | if (cred->cr_uid) { |
e57b6138 | 351 | if (vp->v_type != VDIR && (mode & ISVTX)) |
39b5be4c | 352 | return (EFTYPE); |
e57b6138 | 353 | if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) |
39b5be4c | 354 | return (EPERM); |
f94ceb3b | 355 | } |
39b5be4c | 356 | ip->i_mode &= ~07777; |
7188ac27 | 357 | ip->i_mode |= mode & 07777; |
3e78e260 | 358 | ip->i_flag |= ICHG; |
7188ac27 | 359 | if ((vp->v_flag & VTEXT) && (ip->i_mode & ISVTX) == 0) |
8986c97c | 360 | (void) vnode_pager_uncache(vp); |
47af7174 | 361 | return (0); |
5485e062 BJ |
362 | } |
363 | ||
528f664c SL |
364 | /* |
365 | * Perform chown operation on inode ip; | |
366 | * inode must be locked prior to call. | |
367 | */ | |
ca3e8b68 | 368 | static int |
031fd966 | 369 | ufs_chown(vp, uid, gid, p) |
7188ac27 | 370 | register struct vnode *vp; |
031fd966 KB |
371 | u_int uid; |
372 | u_int gid; | |
c6f5111d | 373 | struct proc *p; |
528f664c | 374 | { |
7188ac27 | 375 | register struct inode *ip = VTOI(vp); |
c6f5111d | 376 | register struct ucred *cred = p->p_ucred; |
4b61628b KM |
377 | uid_t ouid; |
378 | gid_t ogid; | |
379 | int error = 0; | |
528f664c | 380 | #ifdef QUOTA |
4b61628b KM |
381 | register int i; |
382 | long change; | |
bb1b75f4 | 383 | #endif |
528f664c | 384 | |
7188ac27 | 385 | if (uid == (u_short)VNOVAL) |
bb1b75f4 | 386 | uid = ip->i_uid; |
7188ac27 | 387 | if (gid == (u_short)VNOVAL) |
bb1b75f4 | 388 | gid = ip->i_gid; |
18b0bce6 KB |
389 | /* |
390 | * If we don't own the file, are trying to change the owner | |
391 | * of the file, or are not a member of the target group, | |
392 | * the caller must be superuser or the call fails. | |
393 | */ | |
7188ac27 KM |
394 | if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid || |
395 | !groupmember((gid_t)gid, cred)) && | |
c6f5111d | 396 | (error = suser(cred, &p->p_acflag))) |
7188ac27 | 397 | return (error); |
4b61628b KM |
398 | ouid = ip->i_uid; |
399 | ogid = ip->i_gid; | |
bb1b75f4 | 400 | #ifdef QUOTA |
4b61628b KM |
401 | if (error = getinoquota(ip)) |
402 | return (error); | |
403 | if (ouid == uid) { | |
404 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
405 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
406 | } | |
407 | if (ogid == gid) { | |
408 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
409 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
410 | } | |
411 | change = ip->i_blocks; | |
412 | (void) chkdq(ip, -change, cred, CHOWN); | |
413 | (void) chkiq(ip, -1, cred, CHOWN); | |
414 | for (i = 0; i < MAXQUOTAS; i++) { | |
415 | dqrele(vp, ip->i_dquot[i]); | |
416 | ip->i_dquot[i] = NODQUOT; | |
417 | } | |
f94ceb3b | 418 | #endif |
bb1b75f4 SL |
419 | ip->i_uid = uid; |
420 | ip->i_gid = gid; | |
528f664c | 421 | #ifdef QUOTA |
4b61628b KM |
422 | if ((error = getinoquota(ip)) == 0) { |
423 | if (ouid == uid) { | |
424 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
425 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
426 | } | |
427 | if (ogid == gid) { | |
428 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
429 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
430 | } | |
431 | if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { | |
432 | if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) | |
722a9b31 | 433 | goto good; |
4b61628b KM |
434 | else |
435 | (void) chkdq(ip, -change, cred, CHOWN|FORCE); | |
436 | } | |
437 | for (i = 0; i < MAXQUOTAS; i++) { | |
438 | dqrele(vp, ip->i_dquot[i]); | |
439 | ip->i_dquot[i] = NODQUOT; | |
440 | } | |
441 | } | |
442 | ip->i_uid = ouid; | |
443 | ip->i_gid = ogid; | |
444 | if (getinoquota(ip) == 0) { | |
445 | if (ouid == uid) { | |
446 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
447 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
448 | } | |
449 | if (ogid == gid) { | |
450 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
451 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
452 | } | |
722a9b31 KM |
453 | (void) chkdq(ip, change, cred, FORCE|CHOWN); |
454 | (void) chkiq(ip, 1, cred, FORCE|CHOWN); | |
6cb69bbe | 455 | (void) getinoquota(ip); |
4b61628b | 456 | } |
6cb69bbe | 457 | return (error); |
722a9b31 | 458 | good: |
6cb69bbe KM |
459 | if (getinoquota(ip)) |
460 | panic("chown: lost quota"); | |
461 | #endif /* QUOTA */ | |
4b61628b KM |
462 | if (ouid != uid || ogid != gid) |
463 | ip->i_flag |= ICHG; | |
464 | if (ouid != uid && cred->cr_uid != 0) | |
465 | ip->i_mode &= ~ISUID; | |
466 | if (ogid != gid && cred->cr_uid != 0) | |
467 | ip->i_mode &= ~ISGID; | |
468 | return (0); | |
d67a03eb BJ |
469 | } |
470 | ||
7188ac27 | 471 | /* ARGSUSED */ |
031fd966 | 472 | int |
5b169cb7 | 473 | ufs_ioctl(vp, com, data, fflag, cred, p) |
7188ac27 KM |
474 | struct vnode *vp; |
475 | int com; | |
476 | caddr_t data; | |
477 | int fflag; | |
478 | struct ucred *cred; | |
5b169cb7 | 479 | struct proc *p; |
bb1b75f4 | 480 | { |
bb1b75f4 | 481 | |
7188ac27 KM |
482 | return (ENOTTY); |
483 | } | |
484 | ||
485 | /* ARGSUSED */ | |
031fd966 | 486 | int |
5b169cb7 | 487 | ufs_select(vp, which, fflags, cred, p) |
7188ac27 | 488 | struct vnode *vp; |
d1c43d7f | 489 | int which, fflags; |
7188ac27 | 490 | struct ucred *cred; |
5b169cb7 | 491 | struct proc *p; |
7188ac27 KM |
492 | { |
493 | ||
5b169cb7 KM |
494 | /* |
495 | * We should really check to see if I/O is possible. | |
496 | */ | |
497 | return (1); | |
bb1b75f4 | 498 | } |
d67a03eb | 499 | |
4f083fd7 | 500 | /* |
7188ac27 KM |
501 | * Mmap a file |
502 | * | |
503 | * NB Currently unsupported. | |
4f083fd7 | 504 | */ |
7188ac27 | 505 | /* ARGSUSED */ |
031fd966 | 506 | int |
5b169cb7 | 507 | ufs_mmap(vp, fflags, cred, p) |
7188ac27 KM |
508 | struct vnode *vp; |
509 | int fflags; | |
510 | struct ucred *cred; | |
5b169cb7 | 511 | struct proc *p; |
d67a03eb | 512 | { |
d67a03eb | 513 | |
7188ac27 | 514 | return (EINVAL); |
d67a03eb | 515 | } |
64d3a787 | 516 | |
4f083fd7 | 517 | /* |
7188ac27 KM |
518 | * Seek on a file |
519 | * | |
520 | * Nothing to do, so just return. | |
4f083fd7 | 521 | */ |
7188ac27 | 522 | /* ARGSUSED */ |
031fd966 | 523 | int |
7188ac27 KM |
524 | ufs_seek(vp, oldoff, newoff, cred) |
525 | struct vnode *vp; | |
526 | off_t oldoff, newoff; | |
527 | struct ucred *cred; | |
528f664c | 528 | { |
7188ac27 KM |
529 | |
530 | return (0); | |
531 | } | |
532 | ||
533 | /* | |
534 | * ufs remove | |
535 | * Hard to avoid races here, especially | |
536 | * in unlinking directories. | |
537 | */ | |
031fd966 | 538 | int |
6e57e9ff | 539 | ufs_remove(dvp, vp, cnp) |
cfef4373 JH |
540 | struct vnode *dvp, *vp; |
541 | struct componentname *cnp; | |
7188ac27 KM |
542 | { |
543 | register struct inode *ip, *dp; | |
544 | int error; | |
545 | ||
cfef4373 JH |
546 | ip = VTOI(vp); |
547 | dp = VTOI(dvp); | |
548 | error = ufs_dirremove(dvp, cnp); | |
7188ac27 KM |
549 | if (!error) { |
550 | ip->i_nlink--; | |
551 | ip->i_flag |= ICHG; | |
528f664c | 552 | } |
7188ac27 KM |
553 | if (dp == ip) |
554 | vrele(ITOV(ip)); | |
555 | else | |
031fd966 KB |
556 | ufs_iput(ip); |
557 | ufs_iput(dp); | |
7188ac27 | 558 | return (error); |
4f083fd7 SL |
559 | } |
560 | ||
561 | /* | |
7188ac27 | 562 | * link vnode call |
4f083fd7 | 563 | */ |
031fd966 | 564 | int |
6e57e9ff | 565 | ufs_link(vp, tdvp, cnp) |
cfef4373 JH |
566 | register struct vnode *vp; /* source vnode */ |
567 | struct vnode *tdvp; | |
568 | struct componentname *cnp; | |
4f083fd7 | 569 | { |
031fd966 | 570 | register struct inode *ip; |
7188ac27 | 571 | int error; |
4f083fd7 | 572 | |
655da945 | 573 | #ifdef DIANOSTIC |
cfef4373 | 574 | if ((cnp->cn_flags & HASBUF) == 0) |
655da945 KM |
575 | panic("ufs_link: no name"); |
576 | #endif | |
031fd966 | 577 | ip = VTOI(vp); |
655da945 | 578 | if ((unsigned short)ip->i_nlink >= LINK_MAX) { |
cfef4373 | 579 | free(cnp->cn_pnbuf, M_NAMEI); |
986aedaa | 580 | return (EMLINK); |
655da945 | 581 | } |
cfef4373 | 582 | if (tdvp != vp) |
7188ac27 | 583 | ILOCK(ip); |
7188ac27 KM |
584 | ip->i_nlink++; |
585 | ip->i_flag |= ICHG; | |
c59af027 | 586 | error = VOP_UPDATE(vp, &time, &time, 1); |
7188ac27 | 587 | if (!error) |
cfef4373 JH |
588 | error = ufs_direnter(ip, tdvp, cnp); |
589 | if (tdvp != vp) | |
7188ac27 | 590 | IUNLOCK(ip); |
cfef4373 JH |
591 | FREE(cnp->cn_pnbuf, M_NAMEI); |
592 | vput(tdvp); | |
7188ac27 KM |
593 | if (error) { |
594 | ip->i_nlink--; | |
82252d2b | 595 | ip->i_flag |= ICHG; |
7188ac27 KM |
596 | } |
597 | return (error); | |
528f664c SL |
598 | } |
599 | ||
cfef4373 JH |
600 | |
601 | ||
602 | /* | |
603 | * relookup - lookup a path name component | |
604 | * Used by lookup to re-aquire things. | |
605 | */ | |
606 | int | |
6e57e9ff | 607 | relookup(dvp, vpp, cnp) |
cfef4373 JH |
608 | struct vnode *dvp, **vpp; |
609 | struct componentname *cnp; | |
610 | { | |
611 | register char *cp; /* pointer into pathname argument */ | |
612 | register struct vnode *dp = 0; /* the directory we are searching */ | |
613 | struct vnode *tdp; /* saved dp */ | |
614 | struct mount *mp; /* mount table entry */ | |
615 | int docache; /* == 0 do not cache last component */ | |
616 | int wantparent; /* 1 => wantparent or lockparent flag */ | |
617 | int rdonly; /* lookup read-only flag bit */ | |
618 | int error = 0; | |
619 | int newhash; | |
620 | ||
621 | /* | |
622 | * Setup: break out flag bits into variables. | |
623 | */ | |
624 | wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT); | |
625 | docache = (cnp->cn_flags & NOCACHE) ^ NOCACHE; | |
d7961b1d JH |
626 | if (cnp->cn_nameiop == DELETE || |
627 | (wantparent && cnp->cn_nameiop != CREATE)) | |
cfef4373 JH |
628 | docache = 0; |
629 | rdonly = cnp->cn_flags & RDONLY; | |
630 | cnp->cn_flags &= ~ISSYMLINK; | |
631 | dp = dvp; | |
632 | VOP_LOCK(dp); | |
633 | ||
634 | /* dirloop: */ | |
635 | /* | |
636 | * Search a new directory. | |
637 | * | |
638 | * The cn_hash value is for use by vfs_cache. | |
639 | * The last component of the filename is left accessible via | |
640 | * cnp->cn_nameptr for callers that need the name. Callers needing | |
641 | * the name set the SAVENAME flag. When done, they assume | |
642 | * responsibility for freeing the pathname buffer. | |
643 | */ | |
6e57e9ff | 644 | #ifdef NAMEI_DIAGNOSTIC |
cfef4373 JH |
645 | newhash = 0; |
646 | for (cp = cnp->cn_nameptr; *cp != 0 && *cp != '/'; cp++) | |
647 | newhash += (unsigned char)*cp; | |
648 | if (newhash != cnp->cn_hash) | |
649 | panic("relookup: bad hash"); | |
650 | if (cnp->cn_namelen != cp - cnp->cn_nameptr) | |
651 | panic ("relookup: bad len"); | |
cfef4373 JH |
652 | { char c = *cp; |
653 | *cp = '\0'; | |
654 | printf("{%s}: ", cnp->cn_nameptr); | |
655 | *cp = c; } | |
656 | #endif | |
cfef4373 JH |
657 | |
658 | /* | |
659 | * Check for degenerate name (e.g. / or "") | |
660 | * which is a way of talking about a directory, | |
661 | * e.g. like "/." or ".". | |
662 | */ | |
663 | if (cnp->cn_nameptr[0] == '\0') { | |
664 | if (cnp->cn_nameiop != LOOKUP || wantparent) { | |
665 | error = EISDIR; | |
666 | goto bad; | |
667 | } | |
668 | if (dp->v_type != VDIR) { | |
669 | error = ENOTDIR; | |
670 | goto bad; | |
671 | } | |
672 | if (!(cnp->cn_flags & LOCKLEAF)) | |
673 | VOP_UNLOCK(dp); | |
674 | *vpp = dp; | |
675 | if (cnp->cn_flags & SAVESTART) | |
676 | panic("lookup: SAVESTART"); | |
677 | return (0); | |
678 | } | |
679 | ||
cfef4373 JH |
680 | if (cnp->cn_flags & ISDOTDOT) |
681 | panic ("relookup: lookup on dot-dot"); | |
682 | ||
683 | /* | |
684 | * We now have a segment name to search for, and a directory to search. | |
685 | */ | |
686 | if (error = VOP_LOOKUP(dp, vpp, cnp)) { | |
687 | #ifdef DIAGNOSTIC | |
688 | if (*vpp != NULL) | |
689 | panic("leaf should be empty"); | |
690 | #endif | |
691 | #ifdef NAMEI_DIAGNOSTIC | |
692 | printf("not found\n"); | |
693 | #endif | |
694 | if (cnp->cn_nameiop == LOOKUP || cnp->cn_nameiop == DELETE || | |
695 | error != ENOENT || *cp != 0) | |
696 | goto bad; | |
697 | /* | |
698 | * If creating and at end of pathname, then can consider | |
699 | * allowing file to be created. | |
700 | */ | |
701 | if (rdonly || (dvp->v_mount->mnt_flag & MNT_RDONLY)) { | |
702 | error = EROFS; | |
703 | goto bad; | |
704 | } | |
705 | /* | |
706 | * We return with ni_vp NULL to indicate that the entry | |
707 | * doesn't currently exist, leaving a pointer to the | |
708 | * (possibly locked) directory inode in ndp->ni_dvp. | |
709 | */ | |
cfef4373 | 710 | if (cnp->cn_flags & SAVESTART) { |
cfef4373 JH |
711 | /* |
712 | * startdir == dvp, always | |
713 | */ | |
714 | VREF(dvp); | |
cfef4373 | 715 | } |
cfef4373 JH |
716 | return (0); |
717 | } | |
718 | #ifdef NAMEI_DIAGNOSTIC | |
719 | printf("found\n"); | |
720 | #endif | |
721 | ||
722 | dp = *vpp; | |
6e57e9ff | 723 | #ifdef DIAGNOSTIC |
cfef4373 JH |
724 | /* |
725 | * Check for symbolic link | |
726 | */ | |
cfef4373 JH |
727 | if (dp->v_type == VLNK) { |
728 | panic ("relookup: symlink found.\n"); | |
729 | }; | |
730 | ||
731 | /* | |
732 | * Check to see if the vnode has been mounted on; | |
733 | * if so find the root of the mounted file system. | |
734 | */ | |
cfef4373 | 735 | #endif |
cfef4373 JH |
736 | |
737 | ||
738 | nextname: | |
cfef4373 JH |
739 | /* |
740 | * Check for read-only file systems. | |
741 | */ | |
742 | if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) { | |
743 | /* | |
744 | * Disallow directory write attempts on read-only | |
745 | * file systems. | |
746 | */ | |
747 | if (rdonly || (dp->v_mount->mnt_flag & MNT_RDONLY) || | |
748 | (wantparent && | |
749 | (dvp->v_mount->mnt_flag & MNT_RDONLY))) { | |
750 | error = EROFS; | |
751 | goto bad2; | |
752 | } | |
753 | } | |
754 | if (cnp->cn_flags & SAVESTART) { | |
cfef4373 JH |
755 | /* ASSERT(dvp==ndp->ni_startdir) */ |
756 | VREF(dvp); | |
757 | } | |
758 | ||
759 | if (!wantparent) | |
760 | vrele(dvp); | |
761 | if ((cnp->cn_flags & LOCKLEAF) == 0) | |
762 | VOP_UNLOCK(dp); | |
763 | return (0); | |
764 | ||
765 | bad2: | |
766 | if ((cnp->cn_flags & LOCKPARENT) && (cnp->cn_flags & ISLASTCN)) | |
767 | VOP_UNLOCK(dvp); | |
768 | vrele(dvp); | |
769 | bad: | |
770 | vput(dp); | |
771 | *vpp = NULL; | |
772 | return (error); | |
773 | } | |
774 | ||
775 | ||
4f083fd7 SL |
776 | /* |
777 | * Rename system call. | |
778 | * rename("foo", "bar"); | |
779 | * is essentially | |
780 | * unlink("bar"); | |
781 | * link("foo", "bar"); | |
782 | * unlink("foo"); | |
783 | * but ``atomically''. Can't do full commit without saving state in the | |
784 | * inode on disk which isn't feasible at this time. Best we can do is | |
785 | * always guarantee the target exists. | |
786 | * | |
787 | * Basic algorithm is: | |
788 | * | |
789 | * 1) Bump link count on source while we're linking it to the | |
7188ac27 | 790 | * target. This also ensure the inode won't be deleted out |
68f21562 KM |
791 | * from underneath us while we work (it may be truncated by |
792 | * a concurrent `trunc' or `open' for creation). | |
4f083fd7 SL |
793 | * 2) Link source to destination. If destination already exists, |
794 | * delete it first. | |
68f21562 KM |
795 | * 3) Unlink source reference to inode if still around. If a |
796 | * directory was moved and the parent of the destination | |
4f083fd7 SL |
797 | * is different from the source, patch the ".." entry in the |
798 | * directory. | |
4f083fd7 | 799 | */ |
031fd966 | 800 | int |
cfef4373 | 801 | ufs_rename(fdvp, fvp, fcnp, |
6e57e9ff | 802 | tdvp, tvp, tcnp) |
cfef4373 JH |
803 | struct vnode *fdvp, *fvp; |
804 | struct componentname *fcnp; | |
805 | struct vnode *tdvp, *tvp; | |
806 | struct componentname *tcnp; | |
528f664c | 807 | { |
4f083fd7 | 808 | register struct inode *ip, *xp, *dp; |
68f21562 KM |
809 | struct dirtemplate dirbuf; |
810 | int doingdirectory = 0, oldparent = 0, newparent = 0; | |
a5390dce | 811 | int error = 0; |
cfef4373 | 812 | int fdvpneedsrele = 1, tdvpneedsrele = 1; |
4f083fd7 | 813 | |
655da945 | 814 | #ifdef DIANOSTIC |
cfef4373 JH |
815 | if ((tcnp->cn_flags & HASBUF) == 0 || |
816 | (fcnp->cn_flags & HASBUF) == 0) | |
655da945 KM |
817 | panic("ufs_rename: no name"); |
818 | #endif | |
cfef4373 JH |
819 | dp = VTOI(fdvp); |
820 | ip = VTOI(fvp); | |
655da945 KM |
821 | /* |
822 | * Check if just deleting a link name. | |
823 | */ | |
cfef4373 JH |
824 | if (fvp == tvp) { |
825 | VOP_ABORTOP(tdvp, tcnp); | |
826 | vput(tdvp); | |
827 | vput(tvp); | |
828 | vrele(fdvp); | |
655da945 | 829 | if ((ip->i_mode&IFMT) == IFDIR) { |
cfef4373 JH |
830 | VOP_ABORTOP(fdvp, fcnp); |
831 | vrele(fvp); | |
655da945 KM |
832 | return (EINVAL); |
833 | } | |
834 | doingdirectory = 0; | |
835 | goto unlinkit; | |
836 | } | |
7188ac27 | 837 | ILOCK(ip); |
4f083fd7 | 838 | if ((ip->i_mode&IFMT) == IFDIR) { |
4f083fd7 | 839 | /* |
046f18d1 | 840 | * Avoid ".", "..", and aliases of "." for obvious reasons. |
4f083fd7 | 841 | */ |
cfef4373 JH |
842 | if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || |
843 | dp == ip || (fcnp->cn_flags&ISDOTDOT) || (ip->i_flag & IRENAME)) { | |
844 | VOP_ABORTOP(tdvp, tcnp); | |
845 | vput(tdvp); | |
846 | if (tvp) | |
847 | vput(tvp); | |
848 | VOP_ABORTOP(fdvp, fcnp); | |
849 | vrele(fdvp); | |
850 | vput(fvp); | |
7188ac27 | 851 | return (EINVAL); |
4f083fd7 | 852 | } |
68f21562 | 853 | ip->i_flag |= IRENAME; |
4f083fd7 SL |
854 | oldparent = dp->i_number; |
855 | doingdirectory++; | |
856 | } | |
cfef4373 | 857 | vrele(fdvp); |
4f083fd7 SL |
858 | |
859 | /* | |
860 | * 1) Bump link count while we're moving stuff | |
861 | * around. If we crash somewhere before | |
862 | * completing our work, the link count | |
863 | * may be wrong, but correctable. | |
864 | */ | |
865 | ip->i_nlink++; | |
866 | ip->i_flag |= ICHG; | |
cfef4373 | 867 | error = VOP_UPDATE(fvp, &time, &time, 1); |
a388503d | 868 | IUNLOCK(ip); |
4f083fd7 SL |
869 | |
870 | /* | |
871 | * When the target exists, both the directory | |
7188ac27 | 872 | * and target vnodes are returned locked. |
4f083fd7 | 873 | */ |
cfef4373 | 874 | dp = VTOI(tdvp); |
7188ac27 | 875 | xp = NULL; |
cfef4373 JH |
876 | if (tvp) |
877 | xp = VTOI(tvp); | |
046f18d1 SL |
878 | /* |
879 | * If ".." must be changed (ie the directory gets a new | |
81552f0f KM |
880 | * parent) then the source directory must not be in the |
881 | * directory heirarchy above the target, as this would | |
882 | * orphan everything below the source directory. Also | |
883 | * the user must have write permission in the source so | |
884 | * as to be able to change "..". We must repeat the call | |
885 | * to namei, as the parent directory is unlocked by the | |
886 | * call to checkpath(). | |
046f18d1 | 887 | */ |
68f21562 KM |
888 | if (oldparent != dp->i_number) |
889 | newparent = dp->i_number; | |
890 | if (doingdirectory && newparent) { | |
cfef4373 JH |
891 | VOP_LOCK(fvp); |
892 | error = ufs_access(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); | |
893 | VOP_UNLOCK(fvp); | |
48c3b6e8 | 894 | if (error) |
81552f0f | 895 | goto bad; |
655da945 | 896 | if (xp != NULL) |
031fd966 | 897 | ufs_iput(xp); |
cfef4373 | 898 | if (error = ufs_checkpath(ip, dp, tcnp->cn_cred)) |
655da945 | 899 | goto out; |
cfef4373 | 900 | if ((tcnp->cn_flags & SAVESTART) == 0) |
655da945 | 901 | panic("ufs_rename: lost to startdir"); |
5e03b55d | 902 | p->p_spare[1]--; |
cfef4373 | 903 | if (error = relookup(tdvp, &tvp, tcnp)) |
655da945 | 904 | goto out; |
cfef4373 | 905 | dp = VTOI(tdvp); |
655da945 | 906 | xp = NULL; |
cfef4373 JH |
907 | if (tvp) |
908 | xp = VTOI(tvp); | |
81552f0f | 909 | } |
4f083fd7 SL |
910 | /* |
911 | * 2) If target doesn't exist, link the target | |
912 | * to the source and unlink the source. | |
913 | * Otherwise, rewrite the target directory | |
914 | * entry to reference the source inode and | |
915 | * expunge the original entry's existence. | |
916 | */ | |
4f083fd7 | 917 | if (xp == NULL) { |
7188ac27 KM |
918 | if (dp->i_dev != ip->i_dev) |
919 | panic("rename: EXDEV"); | |
4f083fd7 | 920 | /* |
68f21562 KM |
921 | * Account for ".." in new directory. |
922 | * When source and destination have the same | |
923 | * parent we don't fool with the link count. | |
4f083fd7 | 924 | */ |
68f21562 | 925 | if (doingdirectory && newparent) { |
986aedaa KM |
926 | if ((unsigned short)dp->i_nlink >= LINK_MAX) { |
927 | error = EMLINK; | |
928 | goto bad; | |
929 | } | |
4f083fd7 SL |
930 | dp->i_nlink++; |
931 | dp->i_flag |= ICHG; | |
c59af027 | 932 | if (error = VOP_UPDATE(ITOV(dp), &time, &time, 1)) |
986aedaa | 933 | goto bad; |
4f083fd7 | 934 | } |
cfef4373 | 935 | if (error = ufs_direnter(ip, tdvp, tcnp)) { |
394d67a8 KM |
936 | if (doingdirectory && newparent) { |
937 | dp->i_nlink--; | |
938 | dp->i_flag |= ICHG; | |
c59af027 | 939 | (void)VOP_UPDATE(ITOV(dp), &time, &time, 1); |
394d67a8 KM |
940 | } |
941 | goto bad; | |
942 | } | |
031fd966 | 943 | ufs_iput(dp); |
4f083fd7 | 944 | } else { |
7188ac27 KM |
945 | if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) |
946 | panic("rename: EXDEV"); | |
e69c3c9c SL |
947 | /* |
948 | * Short circuit rename(foo, foo). | |
949 | */ | |
950 | if (xp->i_number == ip->i_number) | |
7188ac27 | 951 | panic("rename: same file"); |
80cee150 JB |
952 | /* |
953 | * If the parent directory is "sticky", then the user must | |
954 | * own the parent directory, or the destination of the rename, | |
955 | * otherwise the destination may not be changed (except by | |
956 | * root). This implements append-only directories. | |
957 | */ | |
cfef4373 JH |
958 | if ((dp->i_mode & ISVTX) && tcnp->cn_cred->cr_uid != 0 && |
959 | tcnp->cn_cred->cr_uid != dp->i_uid && | |
960 | xp->i_uid != tcnp->cn_cred->cr_uid) { | |
80cee150 JB |
961 | error = EPERM; |
962 | goto bad; | |
963 | } | |
4f083fd7 | 964 | /* |
655da945 KM |
965 | * Target must be empty if a directory and have no links |
966 | * to it. Also, ensure source and target are compatible | |
967 | * (both directories, or both not directories). | |
4f083fd7 SL |
968 | */ |
969 | if ((xp->i_mode&IFMT) == IFDIR) { | |
cfef4373 | 970 | if (!ufs_dirempty(xp, dp->i_number, tcnp->cn_cred) || |
7188ac27 | 971 | xp->i_nlink > 2) { |
a5390dce | 972 | error = ENOTEMPTY; |
4f083fd7 SL |
973 | goto bad; |
974 | } | |
975 | if (!doingdirectory) { | |
a5390dce | 976 | error = ENOTDIR; |
4f083fd7 SL |
977 | goto bad; |
978 | } | |
7188ac27 | 979 | cache_purge(ITOV(dp)); |
4f083fd7 | 980 | } else if (doingdirectory) { |
a5390dce | 981 | error = EISDIR; |
4f083fd7 SL |
982 | goto bad; |
983 | } | |
cfef4373 | 984 | if (error = ufs_dirrewrite(dp, ip, tcnp)) |
7188ac27 | 985 | goto bad; |
a62786b9 KM |
986 | /* |
987 | * If the target directory is in the same | |
988 | * directory as the source directory, | |
989 | * decrement the link count on the parent | |
990 | * of the target directory. | |
991 | */ | |
992 | if (doingdirectory && !newparent) { | |
993 | dp->i_nlink--; | |
994 | dp->i_flag |= ICHG; | |
995 | } | |
c59af027 | 996 | ufs_iput(dp); |
4f083fd7 | 997 | /* |
a5390dce SL |
998 | * Adjust the link count of the target to |
999 | * reflect the dirrewrite above. If this is | |
1000 | * a directory it is empty and there are | |
1001 | * no links to it, so we can squash the inode and | |
1002 | * any space associated with it. We disallowed | |
1003 | * renaming over top of a directory with links to | |
68f21562 KM |
1004 | * it above, as the remaining link would point to |
1005 | * a directory without "." or ".." entries. | |
4f083fd7 | 1006 | */ |
a5390dce | 1007 | xp->i_nlink--; |
4f083fd7 | 1008 | if (doingdirectory) { |
a5390dce SL |
1009 | if (--xp->i_nlink != 0) |
1010 | panic("rename: linked directory"); | |
c59af027 | 1011 | error = VOP_TRUNCATE(ITOV(xp), (u_long)0, IO_SYNC); |
a5390dce | 1012 | } |
4f083fd7 | 1013 | xp->i_flag |= ICHG; |
031fd966 | 1014 | ufs_iput(xp); |
31db12cb | 1015 | xp = NULL; |
4f083fd7 SL |
1016 | } |
1017 | ||
1018 | /* | |
1019 | * 3) Unlink the source. | |
1020 | */ | |
655da945 | 1021 | unlinkit: |
cfef4373 JH |
1022 | fcnp->cn_flags &= ~MODMASK; |
1023 | fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; | |
1024 | if ((fcnp->cn_flags & SAVESTART) == 0) | |
655da945 | 1025 | panic("ufs_rename: lost from startdir"); |
5e03b55d | 1026 | p->p_spare[1]--; |
cfef4373 JH |
1027 | (void) relookup(fdvp, &fvp, fcnp); /* NEEDSWORK: startdir stuff */ |
1028 | if (fvp != NULL) { | |
1029 | xp = VTOI(fvp); | |
1030 | dp = VTOI(fdvp); | |
7188ac27 | 1031 | } else { |
d9d75b8f KM |
1032 | /* |
1033 | * From name has disappeared. | |
1034 | */ | |
1035 | if (doingdirectory) | |
1036 | panic("rename: lost dir entry"); | |
1037 | vrele(ITOV(ip)); | |
1038 | return (0); | |
7188ac27 | 1039 | } |
4f083fd7 | 1040 | /* |
7188ac27 | 1041 | * Ensure that the directory entry still exists and has not |
68f21562 KM |
1042 | * changed while the new name has been entered. If the source is |
1043 | * a file then the entry may have been unlinked or renamed. In | |
1044 | * either case there is no further work to be done. If the source | |
1045 | * is a directory then it cannot have been rmdir'ed; its link | |
1046 | * count of three would cause a rmdir to fail with ENOTEMPTY. | |
7188ac27 | 1047 | * The IRENAME flag ensures that it cannot be moved by another |
68f21562 | 1048 | * rename. |
4f083fd7 | 1049 | */ |
4f1a9037 | 1050 | if (xp != ip) { |
68f21562 | 1051 | if (doingdirectory) |
4f1a9037 | 1052 | panic("rename: lost dir entry"); |
68f21562 | 1053 | } else { |
4f083fd7 | 1054 | /* |
68f21562 KM |
1055 | * If the source is a directory with a |
1056 | * new parent, the link count of the old | |
1057 | * parent directory must be decremented | |
1058 | * and ".." set to point to the new parent. | |
4f083fd7 | 1059 | */ |
68f21562 | 1060 | if (doingdirectory && newparent) { |
4f083fd7 SL |
1061 | dp->i_nlink--; |
1062 | dp->i_flag |= ICHG; | |
86cdabf6 | 1063 | error = vn_rdwr(UIO_READ, ITOV(xp), (caddr_t)&dirbuf, |
7188ac27 | 1064 | sizeof (struct dirtemplate), (off_t)0, |
86cdabf6 | 1065 | UIO_SYSSPACE, IO_NODELOCKED, |
cfef4373 | 1066 | tcnp->cn_cred, (int *)0, (struct proc *)0); |
68f21562 KM |
1067 | if (error == 0) { |
1068 | if (dirbuf.dotdot_namlen != 2 || | |
1069 | dirbuf.dotdot_name[0] != '.' || | |
1070 | dirbuf.dotdot_name[1] != '.') { | |
031fd966 KB |
1071 | ufs_dirbad(xp, 12, |
1072 | "rename: mangled dir"); | |
68f21562 KM |
1073 | } else { |
1074 | dirbuf.dotdot_ino = newparent; | |
86cdabf6 | 1075 | (void) vn_rdwr(UIO_WRITE, ITOV(xp), |
68f21562 KM |
1076 | (caddr_t)&dirbuf, |
1077 | sizeof (struct dirtemplate), | |
93e273b9 | 1078 | (off_t)0, UIO_SYSSPACE, |
86cdabf6 | 1079 | IO_NODELOCKED|IO_SYNC, |
cfef4373 | 1080 | tcnp->cn_cred, (int *)0, |
5b169cb7 | 1081 | (struct proc *)0); |
7188ac27 | 1082 | cache_purge(ITOV(dp)); |
68f21562 KM |
1083 | } |
1084 | } | |
4f083fd7 | 1085 | } |
cfef4373 | 1086 | error = ufs_dirremove(fdvp, fcnp); |
7188ac27 | 1087 | if (!error) { |
68f21562 KM |
1088 | xp->i_nlink--; |
1089 | xp->i_flag |= ICHG; | |
4f083fd7 | 1090 | } |
68f21562 | 1091 | xp->i_flag &= ~IRENAME; |
4f083fd7 | 1092 | } |
4f083fd7 | 1093 | if (dp) |
7188ac27 | 1094 | vput(ITOV(dp)); |
68f21562 | 1095 | if (xp) |
7188ac27 KM |
1096 | vput(ITOV(xp)); |
1097 | vrele(ITOV(ip)); | |
1098 | return (error); | |
a5390dce | 1099 | |
4f083fd7 | 1100 | bad: |
4f083fd7 | 1101 | if (xp) |
7188ac27 KM |
1102 | vput(ITOV(xp)); |
1103 | vput(ITOV(dp)); | |
4f083fd7 SL |
1104 | out: |
1105 | ip->i_nlink--; | |
1106 | ip->i_flag |= ICHG; | |
7188ac27 KM |
1107 | vrele(ITOV(ip)); |
1108 | return (error); | |
64d3a787 | 1109 | } |
88a7a62a SL |
1110 | |
1111 | /* | |
1112 | * A virgin directory (no blushing please). | |
1113 | */ | |
031fd966 | 1114 | static struct dirtemplate mastertemplate = { |
88a7a62a SL |
1115 | 0, 12, 1, ".", |
1116 | 0, DIRBLKSIZ - 12, 2, ".." | |
1117 | }; | |
1118 | ||
1119 | /* | |
1120 | * Mkdir system call | |
1121 | */ | |
031fd966 | 1122 | int |
6e57e9ff | 1123 | ufs_mkdir(dvp, vpp, cnp, vap) |
cfef4373 JH |
1124 | struct vnode *dvp; |
1125 | struct vnode **vpp; | |
1126 | struct componentname *cnp; | |
7188ac27 | 1127 | struct vattr *vap; |
88a7a62a | 1128 | { |
88a7a62a | 1129 | register struct inode *ip, *dp; |
c59af027 | 1130 | struct vnode *tvp; |
88a7a62a | 1131 | struct dirtemplate dirtemplate; |
7188ac27 KM |
1132 | int error; |
1133 | int dmode; | |
1134 | ||
655da945 | 1135 | #ifdef DIANOSTIC |
cfef4373 | 1136 | if ((cnp->cn_flags & HASBUF) == 0) |
655da945 KM |
1137 | panic("ufs_mkdir: no name"); |
1138 | #endif | |
7188ac27 | 1139 | dp = VTOI(dvp); |
986aedaa | 1140 | if ((unsigned short)dp->i_nlink >= LINK_MAX) { |
cfef4373 | 1141 | free(cnp->cn_pnbuf, M_NAMEI); |
031fd966 | 1142 | ufs_iput(dp); |
986aedaa KM |
1143 | return (EMLINK); |
1144 | } | |
7188ac27 KM |
1145 | dmode = vap->va_mode&0777; |
1146 | dmode |= IFDIR; | |
88a7a62a | 1147 | /* |
655da945 KM |
1148 | * Must simulate part of maknode here to acquire the inode, but |
1149 | * not have it entered in the parent directory. The entry is made | |
1150 | * later after writing "." and ".." entries. | |
88a7a62a | 1151 | */ |
cfef4373 JH |
1152 | if (error = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp)) { |
1153 | free(cnp->cn_pnbuf, M_NAMEI); | |
031fd966 | 1154 | ufs_iput(dp); |
7188ac27 | 1155 | return (error); |
88a7a62a | 1156 | } |
c59af027 | 1157 | ip = VTOI(tvp); |
cfef4373 | 1158 | ip->i_uid = cnp->cn_cred->cr_uid; |
4b61628b | 1159 | ip->i_gid = dp->i_gid; |
88a7a62a | 1160 | #ifdef QUOTA |
4b61628b | 1161 | if ((error = getinoquota(ip)) || |
cfef4373 JH |
1162 | (error = chkiq(ip, 1, cnp->cn_cred, 0))) { |
1163 | free(cnp->cn_pnbuf, M_NAMEI); | |
c59af027 | 1164 | VOP_VFREE(tvp, ip->i_number, dmode); |
031fd966 KB |
1165 | ufs_iput(ip); |
1166 | ufs_iput(dp); | |
4b61628b KM |
1167 | return (error); |
1168 | } | |
88a7a62a SL |
1169 | #endif |
1170 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
1171 | ip->i_mode = dmode; |
1172 | ITOV(ip)->v_type = VDIR; /* Rest init'd in iget() */ | |
88a7a62a | 1173 | ip->i_nlink = 2; |
c59af027 | 1174 | error = VOP_UPDATE(ITOV(ip), &time, &time, 1); |
88a7a62a SL |
1175 | |
1176 | /* | |
1177 | * Bump link count in parent directory | |
1178 | * to reflect work done below. Should | |
1179 | * be done before reference is created | |
1180 | * so reparation is possible if we crash. | |
1181 | */ | |
1182 | dp->i_nlink++; | |
1183 | dp->i_flag |= ICHG; | |
c59af027 | 1184 | if (error = VOP_UPDATE(ITOV(dp), &time, &time, 1)) |
394d67a8 | 1185 | goto bad; |
88a7a62a | 1186 | |
031fd966 | 1187 | /* Initialize directory with "." and ".." from static template. */ |
88a7a62a SL |
1188 | dirtemplate = mastertemplate; |
1189 | dirtemplate.dot_ino = ip->i_number; | |
1190 | dirtemplate.dotdot_ino = dp->i_number; | |
86cdabf6 | 1191 | error = vn_rdwr(UIO_WRITE, ITOV(ip), (caddr_t)&dirtemplate, |
5b169cb7 | 1192 | sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, |
cfef4373 | 1193 | IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (int *)0, (struct proc *)0); |
7188ac27 | 1194 | if (error) { |
88a7a62a SL |
1195 | dp->i_nlink--; |
1196 | dp->i_flag |= ICHG; | |
1197 | goto bad; | |
1198 | } | |
cc173077 | 1199 | if (DIRBLKSIZ > VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) |
031fd966 KB |
1200 | panic("ufs_mkdir: blksize"); /* XXX should grow with balloc() */ |
1201 | else { | |
23de9f20 | 1202 | ip->i_size = DIRBLKSIZ; |
15365e07 KM |
1203 | ip->i_flag |= ICHG; |
1204 | } | |
031fd966 KB |
1205 | |
1206 | /* Directory set up, now install it's entry in the parent directory. */ | |
cfef4373 | 1207 | if (error = ufs_direnter(ip, dvp, cnp)) { |
2a5d2f56 KM |
1208 | dp->i_nlink--; |
1209 | dp->i_flag |= ICHG; | |
88a7a62a SL |
1210 | } |
1211 | bad: | |
1212 | /* | |
c59af027 KM |
1213 | * No need to do an explicit VOP_TRUNCATE here, vrele will do this |
1214 | * for us because we set the link count to 0. | |
88a7a62a | 1215 | */ |
7188ac27 | 1216 | if (error) { |
88a7a62a SL |
1217 | ip->i_nlink = 0; |
1218 | ip->i_flag |= ICHG; | |
031fd966 | 1219 | ufs_iput(ip); |
cbcdacd6 | 1220 | } else |
cfef4373 JH |
1221 | *vpp = ITOV(ip); |
1222 | FREE(cnp->cn_pnbuf, M_NAMEI); | |
031fd966 | 1223 | ufs_iput(dp); |
7188ac27 | 1224 | return (error); |
88a7a62a SL |
1225 | } |
1226 | ||
1227 | /* | |
1228 | * Rmdir system call. | |
1229 | */ | |
031fd966 | 1230 | int |
6e57e9ff JH |
1231 | ufs_rmdir(dvp, vp, cnp) |
1232 | struct vnode *dvp; | |
1233 | struct vnode *vp; | |
cfef4373 | 1234 | struct componentname *cnp; |
88a7a62a | 1235 | { |
88a7a62a | 1236 | register struct inode *ip, *dp; |
031fd966 | 1237 | int error; |
7188ac27 | 1238 | |
cfef4373 JH |
1239 | ip = VTOI(vp); |
1240 | dp = VTOI(dvp); | |
88a7a62a SL |
1241 | /* |
1242 | * No rmdir "." please. | |
1243 | */ | |
1244 | if (dp == ip) { | |
cfef4373 | 1245 | vrele(dvp); |
031fd966 | 1246 | ufs_iput(ip); |
7188ac27 | 1247 | return (EINVAL); |
88a7a62a SL |
1248 | } |
1249 | /* | |
1250 | * Verify the directory is empty (and valid). | |
1251 | * (Rmdir ".." won't be valid since | |
1252 | * ".." will contain a reference to | |
1253 | * the current directory and thus be | |
1254 | * non-empty.) | |
1255 | */ | |
031fd966 KB |
1256 | error = 0; |
1257 | if (ip->i_nlink != 2 || | |
cfef4373 | 1258 | !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) { |
7188ac27 | 1259 | error = ENOTEMPTY; |
88a7a62a SL |
1260 | goto out; |
1261 | } | |
1262 | /* | |
1263 | * Delete reference to directory before purging | |
1264 | * inode. If we crash in between, the directory | |
1265 | * will be reattached to lost+found, | |
1266 | */ | |
cfef4373 | 1267 | if (error = ufs_dirremove(dvp, cnp)) |
88a7a62a SL |
1268 | goto out; |
1269 | dp->i_nlink--; | |
1270 | dp->i_flag |= ICHG; | |
cfef4373 | 1271 | cache_purge(dvp); |
031fd966 | 1272 | ufs_iput(dp); |
cfef4373 | 1273 | dvp = NULL; |
88a7a62a SL |
1274 | /* |
1275 | * Truncate inode. The only stuff left | |
1276 | * in the directory is "." and "..". The | |
1277 | * "." reference is inconsequential since | |
1278 | * we're quashing it. The ".." reference | |
1279 | * has already been adjusted above. We've | |
1280 | * removed the "." reference and the reference | |
1281 | * in the parent directory, but there may be | |
1282 | * other hard links so decrement by 2 and | |
1283 | * worry about them later. | |
1284 | */ | |
1285 | ip->i_nlink -= 2; | |
cfef4373 | 1286 | error = VOP_TRUNCATE(vp, (u_long)0, IO_SYNC); |
7188ac27 | 1287 | cache_purge(ITOV(ip)); |
88a7a62a | 1288 | out: |
cfef4373 | 1289 | if (dvp) |
031fd966 KB |
1290 | ufs_iput(dp); |
1291 | ufs_iput(ip); | |
7188ac27 | 1292 | return (error); |
88a7a62a SL |
1293 | } |
1294 | ||
7188ac27 KM |
1295 | /* |
1296 | * symlink -- make a symbolic link | |
1297 | */ | |
031fd966 | 1298 | int |
6e57e9ff | 1299 | ufs_symlink(dvp, vpp, cnp, vap, target) |
cfef4373 JH |
1300 | struct vnode *dvp; |
1301 | struct vnode **vpp; | |
1302 | struct componentname *cnp; | |
7188ac27 KM |
1303 | struct vattr *vap; |
1304 | char *target; | |
1305 | { | |
7188ac27 KM |
1306 | int error; |
1307 | ||
cfef4373 | 1308 | if (error = ufs_makeinode(IFLNK | vap->va_mode, dvp, vpp, cnp)) |
7188ac27 | 1309 | return (error); |
cfef4373 JH |
1310 | error = vn_rdwr(UIO_WRITE, *vpp, target, strlen(target), (off_t)0, |
1311 | UIO_SYSSPACE, IO_NODELOCKED, cnp->cn_cred, (int *)0, | |
5b169cb7 | 1312 | (struct proc *)0); |
cfef4373 | 1313 | vput(*vpp); |
7188ac27 KM |
1314 | return (error); |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * Vnode op for read and write | |
1319 | */ | |
031fd966 | 1320 | int |
930730fd | 1321 | ufs_readdir(vp, uio, cred, eofflagp) |
7188ac27 KM |
1322 | struct vnode *vp; |
1323 | register struct uio *uio; | |
7188ac27 | 1324 | struct ucred *cred; |
930730fd | 1325 | int *eofflagp; |
88a7a62a | 1326 | { |
86cdabf6 | 1327 | int count, lost, error; |
88a7a62a | 1328 | |
7188ac27 KM |
1329 | count = uio->uio_resid; |
1330 | count &= ~(DIRBLKSIZ - 1); | |
86cdabf6 KM |
1331 | lost = uio->uio_resid - count; |
1332 | if (count < DIRBLKSIZ || (uio->uio_offset & (DIRBLKSIZ -1))) | |
7188ac27 | 1333 | return (EINVAL); |
7188ac27 KM |
1334 | uio->uio_resid = count; |
1335 | uio->uio_iov->iov_len = count; | |
031fd966 | 1336 | error = VOP_READ(vp, uio, 0, cred); |
86cdabf6 | 1337 | uio->uio_resid += lost; |
930730fd KM |
1338 | if ((VTOI(vp)->i_size - uio->uio_offset) <= 0) |
1339 | *eofflagp = 1; | |
1340 | else | |
1341 | *eofflagp = 0; | |
7188ac27 KM |
1342 | return (error); |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * Return target name of a symbolic link | |
1347 | */ | |
031fd966 | 1348 | int |
7188ac27 KM |
1349 | ufs_readlink(vp, uiop, cred) |
1350 | struct vnode *vp; | |
1351 | struct uio *uiop; | |
1352 | struct ucred *cred; | |
1353 | { | |
1354 | ||
031fd966 | 1355 | return (VOP_READ(vp, uiop, 0, cred)); |
7188ac27 KM |
1356 | } |
1357 | ||
1358 | /* | |
1359 | * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually | |
655da945 | 1360 | * done. If a buffer has been saved in anticipation of a CREATE, delete it. |
7188ac27 | 1361 | */ |
66955caf | 1362 | /* ARGSUSED */ |
031fd966 | 1363 | int |
6e57e9ff | 1364 | ufs_abortop(dvp, cnp) |
cfef4373 JH |
1365 | struct vnode *dvp; |
1366 | struct componentname *cnp; | |
7188ac27 | 1367 | { |
cfef4373 JH |
1368 | if ((cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) |
1369 | FREE(cnp->cn_pnbuf, M_NAMEI); | |
66955caf | 1370 | return (0); |
7188ac27 KM |
1371 | } |
1372 | ||
1c3ebc10 KM |
1373 | /* |
1374 | * Lock an inode. | |
1375 | */ | |
031fd966 | 1376 | int |
7188ac27 KM |
1377 | ufs_lock(vp) |
1378 | struct vnode *vp; | |
1379 | { | |
1380 | register struct inode *ip = VTOI(vp); | |
1381 | ||
1382 | ILOCK(ip); | |
1383 | return (0); | |
1384 | } | |
1385 | ||
1c3ebc10 KM |
1386 | /* |
1387 | * Unlock an inode. | |
1388 | */ | |
031fd966 | 1389 | int |
7188ac27 KM |
1390 | ufs_unlock(vp) |
1391 | struct vnode *vp; | |
1392 | { | |
1393 | register struct inode *ip = VTOI(vp); | |
1394 | ||
1395 | if (!(ip->i_flag & ILOCKED)) | |
1396 | panic("ufs_unlock NOT LOCKED"); | |
1397 | IUNLOCK(ip); | |
1398 | return (0); | |
1399 | } | |
1400 | ||
1c3ebc10 KM |
1401 | /* |
1402 | * Check for a locked inode. | |
1403 | */ | |
031fd966 | 1404 | int |
1c3ebc10 KM |
1405 | ufs_islocked(vp) |
1406 | struct vnode *vp; | |
1407 | { | |
1408 | ||
1409 | if (VTOI(vp)->i_flag & ILOCKED) | |
1410 | return (1); | |
1411 | return (0); | |
1412 | } | |
1413 | ||
88a7a62a | 1414 | /* |
4f1ff475 KM |
1415 | * Calculate the logical to physical mapping if not done already, |
1416 | * then call the device strategy routine. | |
88a7a62a | 1417 | */ |
4f1ff475 | 1418 | int checkoverlap = 0; |
e16fa59e | 1419 | |
031fd966 | 1420 | int |
7188ac27 KM |
1421 | ufs_strategy(bp) |
1422 | register struct buf *bp; | |
88a7a62a | 1423 | { |
031fd966 | 1424 | register struct inode *ip; |
e16fa59e | 1425 | struct vnode *vp; |
e16fa59e KM |
1426 | int error; |
1427 | ||
031fd966 | 1428 | ip = VTOI(bp->b_vp); |
e16fa59e KM |
1429 | if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) |
1430 | panic("ufs_strategy: spec"); | |
1431 | if (bp->b_blkno == bp->b_lblkno) { | |
c59af027 KM |
1432 | if (error = |
1433 | VOP_BMAP(bp->b_vp, bp->b_lblkno, NULL, &bp->b_blkno)) | |
e16fa59e | 1434 | return (error); |
20aa076b | 1435 | if ((long)bp->b_blkno == -1) |
e16fa59e | 1436 | clrbuf(bp); |
e16fa59e | 1437 | } |
20aa076b KM |
1438 | if ((long)bp->b_blkno == -1) { |
1439 | biodone(bp); | |
e16fa59e | 1440 | return (0); |
20aa076b | 1441 | } |
4f1ff475 | 1442 | #ifdef DIAGNOSTIC |
031fd966 KB |
1443 | if (checkoverlap && bp->b_vp->v_mount->mnt_stat.f_type == MOUNT_UFS) |
1444 | ffs_checkoverlap(bp, ip); | |
1445 | #endif | |
1446 | ||
e16fa59e KM |
1447 | vp = ip->i_devvp; |
1448 | bp->b_dev = vp->v_rdev; | |
031fd966 | 1449 | (vp->v_op->vop_strategy)(bp); |
7188ac27 KM |
1450 | return (0); |
1451 | } | |
88a7a62a | 1452 | |
e16fa59e KM |
1453 | /* |
1454 | * Print out the contents of an inode. | |
1455 | */ | |
031fd966 | 1456 | int |
e16fa59e KM |
1457 | ufs_print(vp) |
1458 | struct vnode *vp; | |
1459 | { | |
1460 | register struct inode *ip = VTOI(vp); | |
1461 | ||
a8f829ed KM |
1462 | printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number, |
1463 | major(ip->i_dev), minor(ip->i_dev)); | |
1464 | #ifdef FIFO | |
1465 | if (vp->v_type == VFIFO) | |
1466 | fifo_printinfo(vp); | |
1467 | #endif /* FIFO */ | |
1468 | printf("%s\n", (ip->i_flag & ILOCKED) ? " (LOCKED)" : ""); | |
4a8fb1bb | 1469 | if (ip->i_lockholder == 0) |
031fd966 | 1470 | return (0); |
4a8fb1bb KM |
1471 | printf("\towner pid %d", ip->i_lockholder); |
1472 | if (ip->i_lockwaiter) | |
1473 | printf(" waiting pid %d", ip->i_lockwaiter); | |
96bae3e0 | 1474 | printf("\n"); |
031fd966 | 1475 | return (0); |
e16fa59e KM |
1476 | } |
1477 | ||
24a31b70 KM |
1478 | /* |
1479 | * Read wrapper for special devices. | |
1480 | */ | |
031fd966 | 1481 | int |
24a31b70 KM |
1482 | ufsspec_read(vp, uio, ioflag, cred) |
1483 | struct vnode *vp; | |
1484 | struct uio *uio; | |
1485 | int ioflag; | |
1486 | struct ucred *cred; | |
1487 | { | |
1488 | ||
1489 | /* | |
1490 | * Set access flag. | |
1491 | */ | |
1492 | VTOI(vp)->i_flag |= IACC; | |
1493 | return (spec_read(vp, uio, ioflag, cred)); | |
1494 | } | |
1495 | ||
1496 | /* | |
1497 | * Write wrapper for special devices. | |
1498 | */ | |
031fd966 | 1499 | int |
24a31b70 KM |
1500 | ufsspec_write(vp, uio, ioflag, cred) |
1501 | struct vnode *vp; | |
1502 | struct uio *uio; | |
1503 | int ioflag; | |
1504 | struct ucred *cred; | |
1505 | { | |
1506 | ||
1507 | /* | |
1508 | * Set update and change flags. | |
1509 | */ | |
1510 | VTOI(vp)->i_flag |= IUPD|ICHG; | |
1511 | return (spec_write(vp, uio, ioflag, cred)); | |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * Close wrapper for special devices. | |
1516 | * | |
1517 | * Update the times on the inode then do device close. | |
1518 | */ | |
031fd966 | 1519 | int |
5b169cb7 | 1520 | ufsspec_close(vp, fflag, cred, p) |
24a31b70 KM |
1521 | struct vnode *vp; |
1522 | int fflag; | |
1523 | struct ucred *cred; | |
5b169cb7 | 1524 | struct proc *p; |
24a31b70 KM |
1525 | { |
1526 | register struct inode *ip = VTOI(vp); | |
1527 | ||
de67eefc | 1528 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
24a31b70 | 1529 | ITIMES(ip, &time, &time); |
5b169cb7 | 1530 | return (spec_close(vp, fflag, cred, p)); |
24a31b70 KM |
1531 | } |
1532 | ||
d1c43d7f KM |
1533 | #ifdef FIFO |
1534 | /* | |
1535 | * Read wrapper for fifo's | |
1536 | */ | |
031fd966 | 1537 | int |
d1c43d7f KM |
1538 | ufsfifo_read(vp, uio, ioflag, cred) |
1539 | struct vnode *vp; | |
1540 | struct uio *uio; | |
1541 | int ioflag; | |
1542 | struct ucred *cred; | |
1543 | { | |
1544 | ||
1545 | /* | |
1546 | * Set access flag. | |
1547 | */ | |
1548 | VTOI(vp)->i_flag |= IACC; | |
1549 | return (fifo_read(vp, uio, ioflag, cred)); | |
1550 | } | |
1551 | ||
1552 | /* | |
1553 | * Write wrapper for fifo's. | |
1554 | */ | |
031fd966 | 1555 | int |
d1c43d7f KM |
1556 | ufsfifo_write(vp, uio, ioflag, cred) |
1557 | struct vnode *vp; | |
1558 | struct uio *uio; | |
1559 | int ioflag; | |
1560 | struct ucred *cred; | |
1561 | { | |
1562 | ||
1563 | /* | |
1564 | * Set update and change flags. | |
1565 | */ | |
1566 | VTOI(vp)->i_flag |= IUPD|ICHG; | |
1567 | return (fifo_write(vp, uio, ioflag, cred)); | |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * Close wrapper for fifo's. | |
1572 | * | |
1573 | * Update the times on the inode then do device close. | |
1574 | */ | |
5b169cb7 | 1575 | ufsfifo_close(vp, fflag, cred, p) |
d1c43d7f KM |
1576 | struct vnode *vp; |
1577 | int fflag; | |
1578 | struct ucred *cred; | |
5b169cb7 | 1579 | struct proc *p; |
d1c43d7f KM |
1580 | { |
1581 | register struct inode *ip = VTOI(vp); | |
1582 | ||
1583 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) | |
1584 | ITIMES(ip, &time, &time); | |
5b169cb7 | 1585 | return (fifo_close(vp, fflag, cred, p)); |
d1c43d7f KM |
1586 | } |
1587 | #endif /* FIFO */ | |
1588 | ||
0b0bf936 KM |
1589 | /* |
1590 | * Advisory record locking support | |
1591 | */ | |
031fd966 | 1592 | int |
0b0bf936 KM |
1593 | ufs_advlock(vp, id, op, fl, flags) |
1594 | struct vnode *vp; | |
1595 | caddr_t id; | |
1596 | int op; | |
1597 | register struct flock *fl; | |
1598 | int flags; | |
1599 | { | |
1600 | register struct inode *ip = VTOI(vp); | |
1601 | register struct lockf *lock; | |
1602 | off_t start, end; | |
1603 | int error; | |
1604 | ||
1605 | /* | |
1606 | * Avoid the common case of unlocking when inode has no locks. | |
1607 | */ | |
1608 | if (ip->i_lockf == (struct lockf *)0) { | |
1609 | if (op != F_SETLK) { | |
1610 | fl->l_type = F_UNLCK; | |
1611 | return (0); | |
1612 | } | |
1613 | } | |
1614 | /* | |
1615 | * Convert the flock structure into a start and end. | |
1616 | */ | |
1617 | switch (fl->l_whence) { | |
1618 | ||
1619 | case SEEK_SET: | |
1620 | case SEEK_CUR: | |
1621 | /* | |
1622 | * Caller is responsible for adding any necessary offset | |
1623 | * when SEEK_CUR is used. | |
1624 | */ | |
1625 | start = fl->l_start; | |
1626 | break; | |
1627 | ||
1628 | case SEEK_END: | |
1629 | start = ip->i_size + fl->l_start; | |
1630 | break; | |
1631 | ||
1632 | default: | |
1633 | return (EINVAL); | |
1634 | } | |
1635 | if (start < 0) | |
1636 | return (EINVAL); | |
1637 | if (fl->l_len == 0) | |
1638 | end = -1; | |
1639 | else | |
c412cb68 | 1640 | end = start + fl->l_len - 1; |
0b0bf936 KM |
1641 | /* |
1642 | * Create the lockf structure | |
1643 | */ | |
1644 | MALLOC(lock, struct lockf *, sizeof *lock, M_LOCKF, M_WAITOK); | |
1645 | lock->lf_start = start; | |
1646 | lock->lf_end = end; | |
1647 | lock->lf_id = id; | |
1648 | lock->lf_inode = ip; | |
1649 | lock->lf_type = fl->l_type; | |
1650 | lock->lf_next = (struct lockf *)0; | |
1651 | lock->lf_block = (struct lockf *)0; | |
1652 | lock->lf_flags = flags; | |
1653 | /* | |
1654 | * Do the requested operation. | |
1655 | */ | |
1656 | switch(op) { | |
1657 | case F_SETLK: | |
b9fc1077 | 1658 | return (lf_setlock(lock)); |
0b0bf936 KM |
1659 | |
1660 | case F_UNLCK: | |
b9fc1077 KM |
1661 | error = lf_clearlock(lock); |
1662 | FREE(lock, M_LOCKF); | |
1663 | return (error); | |
0b0bf936 KM |
1664 | |
1665 | case F_GETLK: | |
b9fc1077 KM |
1666 | error = lf_getlock(lock, fl); |
1667 | FREE(lock, M_LOCKF); | |
1668 | return (error); | |
0b0bf936 KM |
1669 | |
1670 | default: | |
1671 | free(lock, M_LOCKF); | |
1672 | return (EINVAL); | |
1673 | } | |
1674 | /* NOTREACHED */ | |
1675 | } | |
5b169cb7 KM |
1676 | |
1677 | /* | |
031fd966 KB |
1678 | * Initialize the vnode associated with a new inode, handle aliased |
1679 | * vnodes. | |
5b169cb7 | 1680 | */ |
031fd966 | 1681 | int |
c59af027 | 1682 | ufs_vinit(mntp, specops, fifoops, vpp) |
031fd966 | 1683 | struct mount *mntp; |
c59af027 | 1684 | struct vnodeops *specops, *fifoops; |
031fd966 KB |
1685 | struct vnode **vpp; |
1686 | { | |
1687 | struct inode *ip, *nip; | |
1688 | struct vnode *vp, *nvp; | |
4a8fb1bb | 1689 | extern struct vnodeops spec_vnodeops; |
031fd966 KB |
1690 | |
1691 | vp = *vpp; | |
1692 | ip = VTOI(vp); | |
1693 | switch(vp->v_type = IFTOVT(ip->i_mode)) { | |
1694 | case VCHR: | |
1695 | case VBLK: | |
c59af027 | 1696 | vp->v_op = specops; |
031fd966 | 1697 | if (nvp = checkalias(vp, ip->i_rdev, mntp)) { |
c59af027 | 1698 | /* |
4a8fb1bb | 1699 | * Discard unneeded vnode, but save its inode. |
c59af027 | 1700 | */ |
4a8fb1bb KM |
1701 | remque(ip); |
1702 | IUNLOCK(ip); | |
1703 | nvp->v_data = vp->v_data; | |
1704 | vp->v_data = NULL; | |
1705 | vp->v_op = &spec_vnodeops; | |
1706 | vrele(vp); | |
1707 | vgone(vp); | |
c59af027 | 1708 | /* |
4a8fb1bb | 1709 | * Reinitialize aliased inode. |
c59af027 | 1710 | */ |
4a8fb1bb KM |
1711 | vp = nvp; |
1712 | ip->i_vnode = vp; | |
1713 | ufs_ihashins(ip); | |
031fd966 KB |
1714 | } |
1715 | break; | |
1716 | case VFIFO: | |
1717 | #ifdef FIFO | |
c59af027 | 1718 | vp->v_op = fifoops; |
031fd966 KB |
1719 | break; |
1720 | #else | |
1721 | return (EOPNOTSUPP); | |
1722 | #endif | |
1723 | } | |
031fd966 KB |
1724 | if (ip->i_number == ROOTINO) |
1725 | vp->v_flag |= VROOT; | |
1a3cb193 KM |
1726 | /* |
1727 | * Initialize modrev times | |
1728 | */ | |
1729 | SETHIGH(ip->i_modrev, mono_time.tv_sec); | |
1730 | SETLOW(ip->i_modrev, mono_time.tv_usec * 4294); | |
031fd966 KB |
1731 | *vpp = vp; |
1732 | return (0); | |
1733 | } | |
5b169cb7 | 1734 | |
031fd966 KB |
1735 | /* |
1736 | * Allocate a new inode. | |
1737 | */ | |
1738 | int | |
6e57e9ff | 1739 | ufs_makeinode(mode, dvp, vpp, cnp) |
031fd966 | 1740 | int mode; |
cfef4373 | 1741 | struct vnode *dvp; |
c59af027 | 1742 | struct vnode **vpp; |
cfef4373 | 1743 | struct componentname *cnp; |
031fd966 KB |
1744 | { |
1745 | register struct inode *ip, *pdir; | |
c59af027 | 1746 | struct vnode *tvp; |
031fd966 KB |
1747 | int error; |
1748 | ||
cfef4373 | 1749 | pdir = VTOI(dvp); |
031fd966 | 1750 | #ifdef DIANOSTIC |
cfef4373 | 1751 | if ((cnp->cn_flags & HASBUF) == 0) |
031fd966 KB |
1752 | panic("ufs_makeinode: no name"); |
1753 | #endif | |
c59af027 | 1754 | *vpp = NULL; |
031fd966 KB |
1755 | if ((mode & IFMT) == 0) |
1756 | mode |= IFREG; | |
1757 | ||
cfef4373 JH |
1758 | if (error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) { |
1759 | free(cnp->cn_pnbuf, M_NAMEI); | |
031fd966 KB |
1760 | ufs_iput(pdir); |
1761 | return (error); | |
1762 | } | |
c59af027 | 1763 | ip = VTOI(tvp); |
cfef4373 | 1764 | ip->i_uid = cnp->cn_cred->cr_uid; |
031fd966 KB |
1765 | ip->i_gid = pdir->i_gid; |
1766 | #ifdef QUOTA | |
1767 | if ((error = getinoquota(ip)) || | |
cfef4373 JH |
1768 | (error = chkiq(ip, 1, cnp->cn_cred, 0))) { |
1769 | free(cnp->cn_pnbuf, M_NAMEI); | |
c59af027 | 1770 | VOP_VFREE(tvp, ip->i_number, mode); |
031fd966 KB |
1771 | ufs_iput(ip); |
1772 | ufs_iput(pdir); | |
1773 | return (error); | |
1774 | } | |
1775 | #endif | |
1776 | ip->i_flag |= IACC|IUPD|ICHG; | |
1777 | ip->i_mode = mode; | |
c59af027 | 1778 | tvp->v_type = IFTOVT(mode); /* Rest init'd in iget() */ |
031fd966 | 1779 | ip->i_nlink = 1; |
cfef4373 JH |
1780 | if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) && |
1781 | suser(cnp->cn_cred, NULL)) | |
031fd966 KB |
1782 | ip->i_mode &= ~ISGID; |
1783 | ||
1784 | /* | |
1785 | * Make sure inode goes to disk before directory entry. | |
1786 | */ | |
c59af027 | 1787 | if (error = VOP_UPDATE(tvp, &time, &time, 1)) |
031fd966 | 1788 | goto bad; |
cfef4373 | 1789 | if (error = ufs_direnter(ip, dvp, cnp)) |
031fd966 | 1790 | goto bad; |
cfef4373 JH |
1791 | if ((cnp->cn_flags & SAVESTART) == 0) |
1792 | FREE(cnp->cn_pnbuf, M_NAMEI); | |
031fd966 | 1793 | ufs_iput(pdir); |
c59af027 | 1794 | *vpp = tvp; |
031fd966 KB |
1795 | return (0); |
1796 | ||
1797 | bad: | |
1798 | /* | |
1799 | * Write error occurred trying to update the inode | |
1800 | * or the directory so must deallocate the inode. | |
1801 | */ | |
cfef4373 | 1802 | free(cnp->cn_pnbuf, M_NAMEI); |
031fd966 KB |
1803 | ufs_iput(pdir); |
1804 | ip->i_nlink = 0; | |
1805 | ip->i_flag |= ICHG; | |
1806 | ufs_iput(ip); | |
1807 | return (error); | |
1808 | } | |
cfef4373 JH |
1809 | |
1810 | ||
1811 | #if defined(JOHNH) && 0 | |
1812 | /* | |
1813 | * A hack to get the kernel to compile. | |
1814 | */ | |
1815 | int | |
1816 | hang_addrlist() | |
1817 | { | |
1818 | return 0; | |
1819 | } | |
1820 | int | |
1821 | free_addrlist() | |
1822 | { | |
1823 | return 0; | |
1824 | } | |
1825 | #endif | |
1826 |