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 | * |
69021bc5 | 7 | * @(#)ufs_vnops.c 7.99 (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 | ||
38285224 KM |
26 | #include <vm/vm.h> |
27 | ||
031fd966 KB |
28 | #include <ufs/ufs/lockf.h> |
29 | #include <ufs/ufs/quota.h> | |
30 | #include <ufs/ufs/inode.h> | |
31 | #include <ufs/ufs/dir.h> | |
32 | #include <ufs/ufs/ufsmount.h> | |
33 | #include <ufs/ufs/ufs_extern.h> | |
34 | ||
a6fce6ff CT |
35 | static int ufs_chmod __P((struct vnode *, int, struct ucred *, struct proc *)); |
36 | static int ufs_chown | |
38285224 | 37 | __P((struct vnode *, uid_t, gid_t, struct ucred *, struct proc *)); |
031fd966 | 38 | |
1a3cb193 KM |
39 | union _qcvt { |
40 | quad_t qcvt; | |
41 | long val[2]; | |
42 | }; | |
43 | #define SETHIGH(q, h) { \ | |
44 | union _qcvt tmp; \ | |
45 | tmp.qcvt = (q); \ | |
46 | tmp.val[_QUAD_HIGHWORD] = (h); \ | |
47 | (q) = tmp.qcvt; \ | |
48 | } | |
49 | #define SETLOW(q, l) { \ | |
50 | union _qcvt tmp; \ | |
51 | tmp.qcvt = (q); \ | |
52 | tmp.val[_QUAD_LOWWORD] = (l); \ | |
53 | (q) = tmp.qcvt; \ | |
54 | } | |
1a3cb193 | 55 | |
4f083fd7 | 56 | /* |
7188ac27 | 57 | * Create a regular file |
4f083fd7 | 58 | */ |
031fd966 | 59 | int |
e6e1f8be | 60 | ufs_create(ap) |
69021bc5 KM |
61 | struct vop_create_args /* { |
62 | struct vnode *a_dvp; | |
63 | struct vnode **a_vpp; | |
64 | struct componentname *a_cnp; | |
65 | struct vattr *a_vap; | |
66 | } */ *ap; | |
3e78e260 | 67 | { |
7188ac27 | 68 | int error; |
3e78e260 | 69 | |
031fd966 | 70 | if (error = |
e6e1f8be KM |
71 | ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), |
72 | ap->a_dvp, ap->a_vpp, ap->a_cnp)) | |
7188ac27 | 73 | return (error); |
7188ac27 | 74 | return (0); |
3e78e260 BJ |
75 | } |
76 | ||
4f083fd7 | 77 | /* |
7188ac27 | 78 | * Mknod vnode call |
4f083fd7 | 79 | */ |
7188ac27 | 80 | /* ARGSUSED */ |
031fd966 | 81 | int |
e6e1f8be | 82 | ufs_mknod(ap) |
69021bc5 KM |
83 | struct vop_mknod_args /* { |
84 | struct vnode *a_dvp; | |
85 | struct vnode **a_vpp; | |
86 | struct componentname *a_cnp; | |
87 | struct vattr *a_vap; | |
88 | } */ *ap; | |
3e78e260 | 89 | { |
e6e1f8be KM |
90 | register struct vattr *vap = ap->a_vap; |
91 | register struct vnode **vpp = ap->a_vpp; | |
c59af027 | 92 | register struct inode *ip; |
7188ac27 | 93 | int error; |
3e78e260 | 94 | |
031fd966 | 95 | if (error = |
e6e1f8be KM |
96 | ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), |
97 | ap->a_dvp, vpp, ap->a_cnp)) | |
7188ac27 | 98 | return (error); |
e6e1f8be | 99 | ip = VTOI(*vpp); |
d1c43d7f | 100 | ip->i_flag |= IACC|IUPD|ICHG; |
e6e1f8be | 101 | if (vap->va_rdev != VNOVAL) { |
7188ac27 KM |
102 | /* |
103 | * Want to be able to use this to make badblock | |
104 | * inodes, so don't truncate the dev number. | |
105 | */ | |
e6e1f8be | 106 | ip->i_rdev = vap->va_rdev; |
7188ac27 | 107 | } |
7188ac27 KM |
108 | /* |
109 | * Remove inode so that it will be reloaded by iget and | |
110 | * checked to see if it is an alias of an existing entry | |
111 | * in the inode cache. | |
112 | */ | |
e6e1f8be KM |
113 | vput(*vpp); |
114 | (*vpp)->v_type = VNON; | |
115 | vgone(*vpp); | |
116 | *vpp = 0; | |
7188ac27 | 117 | return (0); |
3e78e260 BJ |
118 | } |
119 | ||
120 | /* | |
7188ac27 KM |
121 | * Open called. |
122 | * | |
123 | * Nothing to do. | |
3e78e260 | 124 | */ |
7188ac27 | 125 | /* ARGSUSED */ |
031fd966 | 126 | int |
e6e1f8be | 127 | ufs_open(ap) |
69021bc5 KM |
128 | struct vop_open_args /* { |
129 | struct vnode *a_vp; | |
130 | int a_mode; | |
131 | struct ucred *a_cred; | |
132 | struct proc *a_p; | |
133 | } */ *ap; | |
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 |
e6e1f8be | 146 | ufs_close(ap) |
69021bc5 KM |
147 | struct vop_close_args /* { |
148 | struct vnode *a_vp; | |
149 | int a_fflag; | |
150 | struct ucred *a_cred; | |
151 | struct proc *a_p; | |
152 | } */ *ap; | |
3e78e260 | 153 | { |
e6e1f8be KM |
154 | register struct vnode *vp = ap->a_vp; |
155 | register struct inode *ip = VTOI(vp); | |
3e78e260 | 156 | |
e6e1f8be | 157 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
7188ac27 KM |
158 | ITIMES(ip, &time, &time); |
159 | return (0); | |
3e78e260 BJ |
160 | } |
161 | ||
4b61628b KM |
162 | /* |
163 | * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. | |
164 | * The mode is shifted to select the owner/group/other fields. The | |
165 | * super user is granted all permissions. | |
166 | */ | |
031fd966 | 167 | int |
e6e1f8be | 168 | ufs_access(ap) |
69021bc5 KM |
169 | struct vop_access_args /* { |
170 | struct vnode *a_vp; | |
171 | int a_mode; | |
172 | struct ucred *a_cred; | |
173 | struct proc *a_p; | |
174 | } */ *ap; | |
3e78e260 | 175 | { |
9342689a | 176 | USES_VOP_ISLOCKED; |
e6e1f8be KM |
177 | register struct vnode *vp = ap->a_vp; |
178 | register struct inode *ip = VTOI(vp); | |
179 | register struct ucred *cred = ap->a_cred; | |
180 | mode_t mode = ap->a_mode; | |
4b61628b KM |
181 | register gid_t *gp; |
182 | int i, error; | |
3e78e260 | 183 | |
4b61628b | 184 | #ifdef DIAGNOSTIC |
e6e1f8be KM |
185 | if (!VOP_ISLOCKED(vp)) { |
186 | vprint("ufs_access: not locked", vp); | |
4b61628b KM |
187 | panic("ufs_access: not locked"); |
188 | } | |
189 | #endif | |
190 | #ifdef QUOTA | |
e6e1f8be KM |
191 | if (mode & VWRITE) { |
192 | switch (vp->v_type) { | |
4b61628b KM |
193 | case VREG: case VDIR: case VLNK: |
194 | if (error = getinoquota(ip)) | |
195 | return (error); | |
196 | } | |
197 | } | |
198 | #endif /* QUOTA */ | |
199 | /* | |
200 | * If you're the super-user, you always get access. | |
201 | */ | |
e6e1f8be | 202 | if (cred->cr_uid == 0) |
4b61628b KM |
203 | return (0); |
204 | /* | |
205 | * Access check is based on only one of owner, group, public. | |
206 | * If not owner, then check group. If not a member of the | |
207 | * group, then check public access. | |
208 | */ | |
e6e1f8be KM |
209 | if (cred->cr_uid != ip->i_uid) { |
210 | mode >>= 3; | |
211 | gp = cred->cr_groups; | |
212 | for (i = 0; i < cred->cr_ngroups; i++, gp++) | |
4b61628b KM |
213 | if (ip->i_gid == *gp) |
214 | goto found; | |
e6e1f8be | 215 | mode >>= 3; |
4b61628b KM |
216 | found: |
217 | ; | |
218 | } | |
e6e1f8be | 219 | if ((ip->i_mode & mode) != 0) |
4b61628b KM |
220 | return (0); |
221 | return (EACCES); | |
3e78e260 BJ |
222 | } |
223 | ||
7188ac27 | 224 | /* ARGSUSED */ |
031fd966 | 225 | int |
e6e1f8be | 226 | ufs_getattr(ap) |
69021bc5 KM |
227 | struct vop_getattr_args /* { |
228 | struct vnode *a_vp; | |
229 | struct vattr *a_vap; | |
230 | struct ucred *a_cred; | |
231 | struct proc *a_p; | |
232 | } */ *ap; | |
3e78e260 | 233 | { |
e6e1f8be KM |
234 | register struct vnode *vp = ap->a_vp; |
235 | register struct inode *ip = VTOI(vp); | |
236 | register struct vattr *vap = ap->a_vap; | |
3e78e260 | 237 | |
7188ac27 | 238 | ITIMES(ip, &time, &time); |
3e78e260 | 239 | /* |
7188ac27 | 240 | * Copy from inode table |
3e78e260 | 241 | */ |
e6e1f8be KM |
242 | vap->va_fsid = ip->i_dev; |
243 | vap->va_fileid = ip->i_number; | |
244 | vap->va_mode = ip->i_mode & ~IFMT; | |
245 | vap->va_nlink = ip->i_nlink; | |
246 | vap->va_uid = ip->i_uid; | |
247 | vap->va_gid = ip->i_gid; | |
248 | vap->va_rdev = (dev_t)ip->i_rdev; | |
d9011ad6 | 249 | vap->va_size = ip->i_din.di_size; |
e6e1f8be KM |
250 | vap->va_atime = ip->i_atime; |
251 | vap->va_mtime = ip->i_mtime; | |
252 | vap->va_ctime = ip->i_ctime; | |
253 | vap->va_flags = ip->i_flags; | |
254 | vap->va_gen = ip->i_gen; | |
7188ac27 | 255 | /* this doesn't belong here */ |
e6e1f8be KM |
256 | if (vp->v_type == VBLK) |
257 | vap->va_blocksize = BLKDEV_IOSIZE; | |
258 | else if (vp->v_type == VCHR) | |
259 | vap->va_blocksize = MAXBSIZE; | |
8eee8525 | 260 | else |
e6e1f8be KM |
261 | vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; |
262 | vap->va_bytes = dbtob(ip->i_blocks); | |
e6e1f8be KM |
263 | vap->va_type = vp->v_type; |
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 |
e6e1f8be | 272 | ufs_setattr(ap) |
69021bc5 KM |
273 | struct vop_setattr_args /* { |
274 | struct vnode *a_vp; | |
275 | struct vattr *a_vap; | |
276 | struct ucred *a_cred; | |
277 | struct proc *a_p; | |
278 | } */ *ap; | |
3e78e260 | 279 | { |
9342689a JH |
280 | USES_VOP_TRUNCATE; |
281 | USES_VOP_UPDATE; | |
e6e1f8be KM |
282 | register struct vattr *vap = ap->a_vap; |
283 | register struct vnode *vp = ap->a_vp; | |
284 | register struct inode *ip = VTOI(vp); | |
285 | register struct ucred *cred = ap->a_cred; | |
286 | register struct proc *p = ap->a_p; | |
7e11a0c9 | 287 | struct timeval atimeval, mtimeval; |
031fd966 | 288 | int error; |
b4d1aee9 | 289 | |
7188ac27 | 290 | /* |
031fd966 | 291 | * Check for unsettable attributes. |
7188ac27 | 292 | */ |
e6e1f8be KM |
293 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || |
294 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || | |
295 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || | |
296 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { | |
7188ac27 | 297 | return (EINVAL); |
b4d1aee9 | 298 | } |
7188ac27 KM |
299 | /* |
300 | * Go through the fields and update iff not VNOVAL. | |
301 | */ | |
e6e1f8be KM |
302 | if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) |
303 | if (error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, p)) | |
7188ac27 | 304 | return (error); |
e6e1f8be KM |
305 | if (vap->va_size != VNOVAL) { |
306 | if (vp->v_type == VDIR) | |
7188ac27 | 307 | return (EISDIR); |
69021bc5 | 308 | if (error = VOP_TRUNCATE(vp, vap->va_size, 0, cred, p)) |
7188ac27 | 309 | return (error); |
3e78e260 | 310 | } |
e6e1f8be | 311 | ip = VTOI(vp); |
7e11a0c9 | 312 | if (vap->va_atime.ts_sec != VNOVAL || vap->va_mtime.ts_sec != VNOVAL) { |
e6e1f8be KM |
313 | if (cred->cr_uid != ip->i_uid && |
314 | (error = suser(cred, &p->p_acflag))) | |
de412887 | 315 | return (error); |
7e11a0c9 | 316 | if (vap->va_atime.ts_sec != VNOVAL) |
7188ac27 | 317 | ip->i_flag |= IACC; |
7e11a0c9 | 318 | if (vap->va_mtime.ts_sec != VNOVAL) |
7188ac27 KM |
319 | ip->i_flag |= IUPD; |
320 | ip->i_flag |= ICHG; | |
7e11a0c9 KM |
321 | atimeval.tv_sec = vap->va_atime.ts_sec; |
322 | atimeval.tv_usec = vap->va_atime.ts_nsec / 1000; | |
323 | mtimeval.tv_sec = vap->va_mtime.ts_sec; | |
324 | mtimeval.tv_usec = vap->va_mtime.ts_nsec / 1000; | |
325 | if (error = VOP_UPDATE(vp, &atimeval, &mtimeval, 1)) | |
7188ac27 | 326 | return (error); |
5485e062 | 327 | } |
031fd966 | 328 | error = 0; |
e6e1f8be KM |
329 | if (vap->va_mode != (mode_t)VNOVAL) |
330 | error = ufs_chmod(vp, (int)vap->va_mode, cred, p); | |
331 | if (vap->va_flags != VNOVAL) { | |
332 | if (cred->cr_uid != ip->i_uid && | |
333 | (error = suser(cred, &p->p_acflag))) | |
d07fc92a | 334 | return (error); |
e6e1f8be KM |
335 | if (cred->cr_uid == 0) { |
336 | ip->i_flags = vap->va_flags; | |
d07fc92a KM |
337 | } else { |
338 | ip->i_flags &= 0xffff0000; | |
e6e1f8be | 339 | ip->i_flags |= (vap->va_flags & 0xffff); |
d07fc92a KM |
340 | } |
341 | ip->i_flag |= ICHG; | |
342 | } | |
7188ac27 | 343 | return (error); |
528f664c SL |
344 | } |
345 | ||
4f083fd7 SL |
346 | /* |
347 | * Change the mode on a file. | |
348 | * Inode must be locked before calling. | |
349 | */ | |
ca3e8b68 | 350 | static int |
8e232de3 | 351 | ufs_chmod(vp, mode, cred, p) |
7188ac27 | 352 | register struct vnode *vp; |
528f664c | 353 | register int mode; |
8e232de3 | 354 | register struct ucred *cred; |
c6f5111d | 355 | struct proc *p; |
528f664c | 356 | { |
7188ac27 | 357 | register struct inode *ip = VTOI(vp); |
de412887 | 358 | int error; |
197da11b | 359 | |
de412887 | 360 | if (cred->cr_uid != ip->i_uid && |
c6f5111d | 361 | (error = suser(cred, &p->p_acflag))) |
de412887 | 362 | return (error); |
7188ac27 | 363 | if (cred->cr_uid) { |
e57b6138 | 364 | if (vp->v_type != VDIR && (mode & ISVTX)) |
39b5be4c | 365 | return (EFTYPE); |
e57b6138 | 366 | if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) |
39b5be4c | 367 | return (EPERM); |
f94ceb3b | 368 | } |
39b5be4c | 369 | ip->i_mode &= ~07777; |
7188ac27 | 370 | ip->i_mode |= mode & 07777; |
3e78e260 | 371 | ip->i_flag |= ICHG; |
7188ac27 | 372 | if ((vp->v_flag & VTEXT) && (ip->i_mode & ISVTX) == 0) |
8986c97c | 373 | (void) vnode_pager_uncache(vp); |
47af7174 | 374 | return (0); |
5485e062 BJ |
375 | } |
376 | ||
528f664c SL |
377 | /* |
378 | * Perform chown operation on inode ip; | |
379 | * inode must be locked prior to call. | |
380 | */ | |
ca3e8b68 | 381 | static int |
8e232de3 | 382 | ufs_chown(vp, uid, gid, cred, p) |
7188ac27 | 383 | register struct vnode *vp; |
38285224 KM |
384 | uid_t uid; |
385 | gid_t gid; | |
8e232de3 | 386 | struct ucred *cred; |
c6f5111d | 387 | struct proc *p; |
528f664c | 388 | { |
7188ac27 | 389 | register struct inode *ip = VTOI(vp); |
4b61628b KM |
390 | uid_t ouid; |
391 | gid_t ogid; | |
392 | int error = 0; | |
528f664c | 393 | #ifdef QUOTA |
4b61628b KM |
394 | register int i; |
395 | long change; | |
bb1b75f4 | 396 | #endif |
528f664c | 397 | |
38285224 | 398 | if (uid == (uid_t)VNOVAL) |
bb1b75f4 | 399 | uid = ip->i_uid; |
38285224 | 400 | if (gid == (gid_t)VNOVAL) |
bb1b75f4 | 401 | gid = ip->i_gid; |
18b0bce6 KB |
402 | /* |
403 | * If we don't own the file, are trying to change the owner | |
404 | * of the file, or are not a member of the target group, | |
405 | * the caller must be superuser or the call fails. | |
406 | */ | |
7188ac27 KM |
407 | if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid || |
408 | !groupmember((gid_t)gid, cred)) && | |
c6f5111d | 409 | (error = suser(cred, &p->p_acflag))) |
7188ac27 | 410 | return (error); |
4b61628b KM |
411 | ouid = ip->i_uid; |
412 | ogid = ip->i_gid; | |
bb1b75f4 | 413 | #ifdef QUOTA |
4b61628b KM |
414 | if (error = getinoquota(ip)) |
415 | return (error); | |
416 | if (ouid == uid) { | |
417 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
418 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
419 | } | |
420 | if (ogid == gid) { | |
421 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
422 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
423 | } | |
424 | change = ip->i_blocks; | |
425 | (void) chkdq(ip, -change, cred, CHOWN); | |
426 | (void) chkiq(ip, -1, cred, CHOWN); | |
427 | for (i = 0; i < MAXQUOTAS; i++) { | |
428 | dqrele(vp, ip->i_dquot[i]); | |
429 | ip->i_dquot[i] = NODQUOT; | |
430 | } | |
f94ceb3b | 431 | #endif |
bb1b75f4 SL |
432 | ip->i_uid = uid; |
433 | ip->i_gid = gid; | |
528f664c | 434 | #ifdef QUOTA |
4b61628b KM |
435 | if ((error = getinoquota(ip)) == 0) { |
436 | if (ouid == uid) { | |
437 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
438 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
439 | } | |
440 | if (ogid == gid) { | |
441 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
442 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
443 | } | |
444 | if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { | |
445 | if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) | |
722a9b31 | 446 | goto good; |
4b61628b KM |
447 | else |
448 | (void) chkdq(ip, -change, cred, CHOWN|FORCE); | |
449 | } | |
450 | for (i = 0; i < MAXQUOTAS; i++) { | |
451 | dqrele(vp, ip->i_dquot[i]); | |
452 | ip->i_dquot[i] = NODQUOT; | |
453 | } | |
454 | } | |
455 | ip->i_uid = ouid; | |
456 | ip->i_gid = ogid; | |
457 | if (getinoquota(ip) == 0) { | |
458 | if (ouid == uid) { | |
459 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
460 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
461 | } | |
462 | if (ogid == gid) { | |
463 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
464 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
465 | } | |
722a9b31 KM |
466 | (void) chkdq(ip, change, cred, FORCE|CHOWN); |
467 | (void) chkiq(ip, 1, cred, FORCE|CHOWN); | |
6cb69bbe | 468 | (void) getinoquota(ip); |
4b61628b | 469 | } |
6cb69bbe | 470 | return (error); |
722a9b31 | 471 | good: |
6cb69bbe KM |
472 | if (getinoquota(ip)) |
473 | panic("chown: lost quota"); | |
474 | #endif /* QUOTA */ | |
4b61628b KM |
475 | if (ouid != uid || ogid != gid) |
476 | ip->i_flag |= ICHG; | |
477 | if (ouid != uid && cred->cr_uid != 0) | |
478 | ip->i_mode &= ~ISUID; | |
479 | if (ogid != gid && cred->cr_uid != 0) | |
480 | ip->i_mode &= ~ISGID; | |
481 | return (0); | |
d67a03eb BJ |
482 | } |
483 | ||
7188ac27 | 484 | /* ARGSUSED */ |
031fd966 | 485 | int |
e6e1f8be | 486 | ufs_ioctl(ap) |
69021bc5 KM |
487 | struct vop_ioctl_args /* { |
488 | struct vnode *a_vp; | |
489 | int a_command; | |
490 | caddr_t a_data; | |
491 | int a_fflag; | |
492 | struct ucred *a_cred; | |
493 | struct proc *a_p; | |
494 | } */ *ap; | |
bb1b75f4 | 495 | { |
bb1b75f4 | 496 | |
7188ac27 KM |
497 | return (ENOTTY); |
498 | } | |
499 | ||
500 | /* ARGSUSED */ | |
031fd966 | 501 | int |
e6e1f8be | 502 | ufs_select(ap) |
69021bc5 KM |
503 | struct vop_select_args /* { |
504 | struct vnode *a_vp; | |
505 | int a_which; | |
506 | int a_fflags; | |
507 | struct ucred *a_cred; | |
508 | struct proc *a_p; | |
509 | } */ *ap; | |
7188ac27 KM |
510 | { |
511 | ||
5b169cb7 KM |
512 | /* |
513 | * We should really check to see if I/O is possible. | |
514 | */ | |
515 | return (1); | |
bb1b75f4 | 516 | } |
d67a03eb | 517 | |
4f083fd7 | 518 | /* |
7188ac27 KM |
519 | * Mmap a file |
520 | * | |
521 | * NB Currently unsupported. | |
4f083fd7 | 522 | */ |
7188ac27 | 523 | /* ARGSUSED */ |
031fd966 | 524 | int |
e6e1f8be | 525 | ufs_mmap(ap) |
69021bc5 KM |
526 | struct vop_mmap_args /* { |
527 | struct vnode *a_vp; | |
528 | int a_fflags; | |
529 | struct ucred *a_cred; | |
530 | struct proc *a_p; | |
531 | } */ *ap; | |
d67a03eb | 532 | { |
d67a03eb | 533 | |
7188ac27 | 534 | return (EINVAL); |
d67a03eb | 535 | } |
64d3a787 | 536 | |
4f083fd7 | 537 | /* |
7188ac27 KM |
538 | * Seek on a file |
539 | * | |
540 | * Nothing to do, so just return. | |
4f083fd7 | 541 | */ |
7188ac27 | 542 | /* ARGSUSED */ |
031fd966 | 543 | int |
e6e1f8be | 544 | ufs_seek(ap) |
69021bc5 KM |
545 | struct vop_seek_args /* { |
546 | struct vnode *a_vp; | |
547 | off_t a_oldoff; | |
548 | off_t a_newoff; | |
549 | struct ucred *a_cred; | |
550 | } */ *ap; | |
528f664c | 551 | { |
7188ac27 KM |
552 | |
553 | return (0); | |
554 | } | |
555 | ||
556 | /* | |
557 | * ufs remove | |
558 | * Hard to avoid races here, especially | |
559 | * in unlinking directories. | |
560 | */ | |
031fd966 | 561 | int |
e6e1f8be | 562 | ufs_remove(ap) |
69021bc5 KM |
563 | struct vop_remove_args /* { |
564 | struct vnode *a_dvp; | |
565 | struct vnode *a_vp; | |
566 | struct componentname *a_cnp; | |
567 | } */ *ap; | |
7188ac27 KM |
568 | { |
569 | register struct inode *ip, *dp; | |
570 | int error; | |
571 | ||
e1b76915 JH |
572 | ip = VTOI(ap->a_vp); |
573 | dp = VTOI(ap->a_dvp); | |
574 | error = ufs_dirremove(ap->a_dvp, ap->a_cnp); | |
7188ac27 KM |
575 | if (!error) { |
576 | ip->i_nlink--; | |
577 | ip->i_flag |= ICHG; | |
528f664c | 578 | } |
7188ac27 KM |
579 | if (dp == ip) |
580 | vrele(ITOV(ip)); | |
581 | else | |
031fd966 KB |
582 | ufs_iput(ip); |
583 | ufs_iput(dp); | |
7188ac27 | 584 | return (error); |
4f083fd7 SL |
585 | } |
586 | ||
587 | /* | |
7188ac27 | 588 | * link vnode call |
4f083fd7 | 589 | */ |
031fd966 | 590 | int |
e6e1f8be | 591 | ufs_link(ap) |
69021bc5 KM |
592 | struct vop_link_args /* { |
593 | struct vnode *a_vp; | |
594 | struct vnode *a_tdvp; | |
595 | struct componentname *a_cnp; | |
596 | } */ *ap; | |
4f083fd7 | 597 | { |
9342689a | 598 | USES_VOP_UPDATE; |
3330c9fe | 599 | USES_VOP_ABORTOP; |
e6e1f8be KM |
600 | register struct vnode *vp = ap->a_vp; |
601 | register struct vnode *tdvp = ap->a_tdvp; | |
602 | register struct componentname *cnp = ap->a_cnp; | |
031fd966 | 603 | register struct inode *ip; |
7188ac27 | 604 | int error; |
4f083fd7 | 605 | |
e6e1f8be KM |
606 | if (vp->v_mount != tdvp->v_mount) { |
607 | VOP_ABORTOP(vp, cnp); | |
608 | if (tdvp == vp) | |
609 | vrele(vp); | |
3330c9fe | 610 | else |
e6e1f8be | 611 | vput(vp); |
3330c9fe JSP |
612 | return (EXDEV); |
613 | } | |
614 | ||
38285224 | 615 | #ifdef DIAGNOSTIC |
e6e1f8be | 616 | if ((cnp->cn_flags & HASBUF) == 0) |
655da945 KM |
617 | panic("ufs_link: no name"); |
618 | #endif | |
e6e1f8be | 619 | ip = VTOI(tdvp); |
38285224 | 620 | if ((nlink_t)ip->i_nlink >= LINK_MAX) { |
e6e1f8be | 621 | free(cnp->cn_pnbuf, M_NAMEI); |
986aedaa | 622 | return (EMLINK); |
655da945 | 623 | } |
e6e1f8be | 624 | if (vp != tdvp) |
7188ac27 | 625 | ILOCK(ip); |
7188ac27 KM |
626 | ip->i_nlink++; |
627 | ip->i_flag |= ICHG; | |
e6e1f8be | 628 | error = VOP_UPDATE(tdvp, &time, &time, 1); |
7188ac27 | 629 | if (!error) |
e6e1f8be KM |
630 | error = ufs_direnter(ip, vp, cnp); |
631 | if (vp != tdvp) | |
7188ac27 | 632 | IUNLOCK(ip); |
e6e1f8be KM |
633 | FREE(cnp->cn_pnbuf, M_NAMEI); |
634 | vput(vp); | |
7188ac27 KM |
635 | if (error) { |
636 | ip->i_nlink--; | |
82252d2b | 637 | ip->i_flag |= ICHG; |
7188ac27 KM |
638 | } |
639 | return (error); | |
528f664c SL |
640 | } |
641 | ||
cfef4373 JH |
642 | |
643 | ||
644 | /* | |
645 | * relookup - lookup a path name component | |
646 | * Used by lookup to re-aquire things. | |
647 | */ | |
648 | int | |
6e57e9ff | 649 | relookup(dvp, vpp, cnp) |
cfef4373 JH |
650 | struct vnode *dvp, **vpp; |
651 | struct componentname *cnp; | |
652 | { | |
9342689a JH |
653 | USES_VOP_LOCK; |
654 | USES_VOP_LOOKUP; | |
655 | USES_VOP_UNLOCK; | |
cfef4373 JH |
656 | register struct vnode *dp = 0; /* the directory we are searching */ |
657 | struct vnode *tdp; /* saved dp */ | |
658 | struct mount *mp; /* mount table entry */ | |
659 | int docache; /* == 0 do not cache last component */ | |
660 | int wantparent; /* 1 => wantparent or lockparent flag */ | |
661 | int rdonly; /* lookup read-only flag bit */ | |
d36023e3 KM |
662 | char *cp; /* DEBUG: check name ptr/len */ |
663 | int newhash; /* DEBUG: check name hash */ | |
cfef4373 | 664 | int error = 0; |
cfef4373 JH |
665 | |
666 | /* | |
667 | * Setup: break out flag bits into variables. | |
668 | */ | |
669 | wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT); | |
670 | docache = (cnp->cn_flags & NOCACHE) ^ NOCACHE; | |
d7961b1d JH |
671 | if (cnp->cn_nameiop == DELETE || |
672 | (wantparent && cnp->cn_nameiop != CREATE)) | |
cfef4373 JH |
673 | docache = 0; |
674 | rdonly = cnp->cn_flags & RDONLY; | |
675 | cnp->cn_flags &= ~ISSYMLINK; | |
676 | dp = dvp; | |
677 | VOP_LOCK(dp); | |
678 | ||
679 | /* dirloop: */ | |
680 | /* | |
681 | * Search a new directory. | |
682 | * | |
683 | * The cn_hash value is for use by vfs_cache. | |
684 | * The last component of the filename is left accessible via | |
685 | * cnp->cn_nameptr for callers that need the name. Callers needing | |
686 | * the name set the SAVENAME flag. When done, they assume | |
687 | * responsibility for freeing the pathname buffer. | |
688 | */ | |
6e57e9ff | 689 | #ifdef NAMEI_DIAGNOSTIC |
d36023e3 | 690 | for (newhash = 0, cp = cnp->cn_nameptr; *cp != 0 && *cp != '/'; cp++) |
cfef4373 JH |
691 | newhash += (unsigned char)*cp; |
692 | if (newhash != cnp->cn_hash) | |
693 | panic("relookup: bad hash"); | |
694 | if (cnp->cn_namelen != cp - cnp->cn_nameptr) | |
695 | panic ("relookup: bad len"); | |
d36023e3 KM |
696 | if (*cp != 0) |
697 | panic("relookup: not last component"); | |
cfef4373 | 698 | printf("{%s}: ", cnp->cn_nameptr); |
cfef4373 | 699 | #endif |
cfef4373 JH |
700 | |
701 | /* | |
702 | * Check for degenerate name (e.g. / or "") | |
703 | * which is a way of talking about a directory, | |
704 | * e.g. like "/." or ".". | |
705 | */ | |
706 | if (cnp->cn_nameptr[0] == '\0') { | |
707 | if (cnp->cn_nameiop != LOOKUP || wantparent) { | |
708 | error = EISDIR; | |
709 | goto bad; | |
710 | } | |
711 | if (dp->v_type != VDIR) { | |
712 | error = ENOTDIR; | |
713 | goto bad; | |
714 | } | |
715 | if (!(cnp->cn_flags & LOCKLEAF)) | |
716 | VOP_UNLOCK(dp); | |
717 | *vpp = dp; | |
718 | if (cnp->cn_flags & SAVESTART) | |
719 | panic("lookup: SAVESTART"); | |
720 | return (0); | |
721 | } | |
722 | ||
cfef4373 JH |
723 | if (cnp->cn_flags & ISDOTDOT) |
724 | panic ("relookup: lookup on dot-dot"); | |
725 | ||
726 | /* | |
727 | * We now have a segment name to search for, and a directory to search. | |
728 | */ | |
729 | if (error = VOP_LOOKUP(dp, vpp, cnp)) { | |
730 | #ifdef DIAGNOSTIC | |
731 | if (*vpp != NULL) | |
732 | panic("leaf should be empty"); | |
cfef4373 | 733 | #endif |
39a892ba | 734 | if (error != EJUSTRETURN) |
cfef4373 JH |
735 | goto bad; |
736 | /* | |
737 | * If creating and at end of pathname, then can consider | |
738 | * allowing file to be created. | |
739 | */ | |
740 | if (rdonly || (dvp->v_mount->mnt_flag & MNT_RDONLY)) { | |
741 | error = EROFS; | |
742 | goto bad; | |
743 | } | |
d36023e3 KM |
744 | /* ASSERT(dvp == ndp->ni_startdir) */ |
745 | if (cnp->cn_flags & SAVESTART) | |
746 | VREF(dvp); | |
cfef4373 JH |
747 | /* |
748 | * We return with ni_vp NULL to indicate that the entry | |
749 | * doesn't currently exist, leaving a pointer to the | |
750 | * (possibly locked) directory inode in ndp->ni_dvp. | |
751 | */ | |
cfef4373 JH |
752 | return (0); |
753 | } | |
cfef4373 | 754 | dp = *vpp; |
2021967e | 755 | |
6e57e9ff | 756 | #ifdef DIAGNOSTIC |
cfef4373 JH |
757 | /* |
758 | * Check for symbolic link | |
759 | */ | |
2021967e | 760 | if (dp->v_type == VLNK && (cnp->cn_flags & FOLLOW)) |
cfef4373 | 761 | panic ("relookup: symlink found.\n"); |
cfef4373 | 762 | #endif |
cfef4373 | 763 | |
cfef4373 | 764 | nextname: |
cfef4373 JH |
765 | /* |
766 | * Check for read-only file systems. | |
767 | */ | |
768 | if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) { | |
769 | /* | |
770 | * Disallow directory write attempts on read-only | |
771 | * file systems. | |
772 | */ | |
773 | if (rdonly || (dp->v_mount->mnt_flag & MNT_RDONLY) || | |
774 | (wantparent && | |
775 | (dvp->v_mount->mnt_flag & MNT_RDONLY))) { | |
776 | error = EROFS; | |
777 | goto bad2; | |
778 | } | |
779 | } | |
d36023e3 KM |
780 | /* ASSERT(dvp == ndp->ni_startdir) */ |
781 | if (cnp->cn_flags & SAVESTART) | |
cfef4373 | 782 | VREF(dvp); |
cfef4373 JH |
783 | |
784 | if (!wantparent) | |
785 | vrele(dvp); | |
786 | if ((cnp->cn_flags & LOCKLEAF) == 0) | |
787 | VOP_UNLOCK(dp); | |
788 | return (0); | |
789 | ||
790 | bad2: | |
791 | if ((cnp->cn_flags & LOCKPARENT) && (cnp->cn_flags & ISLASTCN)) | |
792 | VOP_UNLOCK(dvp); | |
793 | vrele(dvp); | |
794 | bad: | |
795 | vput(dp); | |
796 | *vpp = NULL; | |
797 | return (error); | |
798 | } | |
799 | ||
800 | ||
4f083fd7 SL |
801 | /* |
802 | * Rename system call. | |
803 | * rename("foo", "bar"); | |
804 | * is essentially | |
805 | * unlink("bar"); | |
806 | * link("foo", "bar"); | |
807 | * unlink("foo"); | |
808 | * but ``atomically''. Can't do full commit without saving state in the | |
809 | * inode on disk which isn't feasible at this time. Best we can do is | |
810 | * always guarantee the target exists. | |
811 | * | |
812 | * Basic algorithm is: | |
813 | * | |
814 | * 1) Bump link count on source while we're linking it to the | |
7188ac27 | 815 | * target. This also ensure the inode won't be deleted out |
68f21562 KM |
816 | * from underneath us while we work (it may be truncated by |
817 | * a concurrent `trunc' or `open' for creation). | |
4f083fd7 SL |
818 | * 2) Link source to destination. If destination already exists, |
819 | * delete it first. | |
68f21562 KM |
820 | * 3) Unlink source reference to inode if still around. If a |
821 | * directory was moved and the parent of the destination | |
4f083fd7 SL |
822 | * is different from the source, patch the ".." entry in the |
823 | * directory. | |
4f083fd7 | 824 | */ |
031fd966 | 825 | int |
e6e1f8be | 826 | ufs_rename(ap) |
69021bc5 KM |
827 | struct vop_rename_args /* { |
828 | struct vnode *a_fdvp; | |
829 | struct vnode *a_fvp; | |
830 | struct componentname *a_fcnp; | |
831 | struct vnode *a_tdvp; | |
832 | struct vnode *a_tvp; | |
833 | struct componentname *a_tcnp; | |
834 | } */ *ap; | |
528f664c | 835 | { |
9342689a JH |
836 | USES_VOP_ABORTOP; |
837 | USES_VOP_ACCESS; | |
838 | USES_VOP_LOCK; | |
839 | USES_VOP_TRUNCATE; | |
840 | USES_VOP_UNLOCK; | |
841 | USES_VOP_UPDATE; | |
e6e1f8be KM |
842 | struct vnode *tvp = ap->a_tvp; |
843 | register struct vnode *tdvp = ap->a_tdvp; | |
844 | struct vnode *fvp = ap->a_fvp; | |
845 | register struct vnode *fdvp = ap->a_fdvp; | |
846 | register struct componentname *tcnp = ap->a_tcnp; | |
847 | register struct componentname *fcnp = ap->a_fcnp; | |
4f083fd7 | 848 | register struct inode *ip, *xp, *dp; |
68f21562 KM |
849 | struct dirtemplate dirbuf; |
850 | int doingdirectory = 0, oldparent = 0, newparent = 0; | |
a5390dce | 851 | int error = 0; |
cfef4373 | 852 | int fdvpneedsrele = 1, tdvpneedsrele = 1; |
4f083fd7 | 853 | |
3330c9fe | 854 | /* Check for cross-device rename */ |
e6e1f8be KM |
855 | if ((fvp->v_mount != tdvp->v_mount) || |
856 | (tvp && (fvp->v_mount != tvp->v_mount))) { | |
857 | VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */ | |
858 | if (tdvp == tvp) | |
859 | vrele(tdvp); | |
3330c9fe | 860 | else |
e6e1f8be KM |
861 | vput(tdvp); |
862 | if (tvp) | |
863 | vput(tvp); | |
864 | VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */ | |
865 | vrele(fdvp); | |
866 | vrele(fvp); | |
3330c9fe JSP |
867 | return (EXDEV); |
868 | } | |
869 | ||
38285224 | 870 | #ifdef DIAGNOSTIC |
e6e1f8be KM |
871 | if ((tcnp->cn_flags & HASBUF) == 0 || |
872 | (fcnp->cn_flags & HASBUF) == 0) | |
655da945 KM |
873 | panic("ufs_rename: no name"); |
874 | #endif | |
e6e1f8be KM |
875 | dp = VTOI(fdvp); |
876 | ip = VTOI(fvp); | |
655da945 KM |
877 | /* |
878 | * Check if just deleting a link name. | |
879 | */ | |
e6e1f8be KM |
880 | if (fvp == tvp) { |
881 | VOP_ABORTOP(tdvp, tcnp); | |
882 | vput(tdvp); | |
883 | vput(tvp); | |
884 | vrele(fdvp); | |
655da945 | 885 | if ((ip->i_mode&IFMT) == IFDIR) { |
e6e1f8be KM |
886 | VOP_ABORTOP(fdvp, fcnp); |
887 | vrele(fvp); | |
655da945 KM |
888 | return (EINVAL); |
889 | } | |
890 | doingdirectory = 0; | |
891 | goto unlinkit; | |
892 | } | |
7188ac27 | 893 | ILOCK(ip); |
4f083fd7 | 894 | if ((ip->i_mode&IFMT) == IFDIR) { |
4f083fd7 | 895 | /* |
046f18d1 | 896 | * Avoid ".", "..", and aliases of "." for obvious reasons. |
4f083fd7 | 897 | */ |
e6e1f8be KM |
898 | if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || |
899 | dp == ip || (fcnp->cn_flags&ISDOTDOT) || | |
900 | (ip->i_flag & IRENAME)) { | |
901 | VOP_ABORTOP(tdvp, tcnp); | |
902 | vput(tdvp); | |
903 | if (tvp) | |
904 | vput(tvp); | |
905 | VOP_ABORTOP(fdvp, fcnp); | |
906 | vrele(fdvp); | |
907 | vput(fvp); | |
7188ac27 | 908 | return (EINVAL); |
4f083fd7 | 909 | } |
68f21562 | 910 | ip->i_flag |= IRENAME; |
4f083fd7 SL |
911 | oldparent = dp->i_number; |
912 | doingdirectory++; | |
913 | } | |
e6e1f8be | 914 | vrele(fdvp); |
4f083fd7 SL |
915 | |
916 | /* | |
917 | * 1) Bump link count while we're moving stuff | |
918 | * around. If we crash somewhere before | |
919 | * completing our work, the link count | |
920 | * may be wrong, but correctable. | |
921 | */ | |
922 | ip->i_nlink++; | |
923 | ip->i_flag |= ICHG; | |
e6e1f8be | 924 | error = VOP_UPDATE(fvp, &time, &time, 1); |
a388503d | 925 | IUNLOCK(ip); |
4f083fd7 SL |
926 | |
927 | /* | |
928 | * When the target exists, both the directory | |
7188ac27 | 929 | * and target vnodes are returned locked. |
4f083fd7 | 930 | */ |
e6e1f8be | 931 | dp = VTOI(tdvp); |
7188ac27 | 932 | xp = NULL; |
e6e1f8be KM |
933 | if (tvp) |
934 | xp = VTOI(tvp); | |
046f18d1 SL |
935 | /* |
936 | * If ".." must be changed (ie the directory gets a new | |
81552f0f KM |
937 | * parent) then the source directory must not be in the |
938 | * directory heirarchy above the target, as this would | |
939 | * orphan everything below the source directory. Also | |
940 | * the user must have write permission in the source so | |
941 | * as to be able to change "..". We must repeat the call | |
942 | * to namei, as the parent directory is unlocked by the | |
943 | * call to checkpath(). | |
046f18d1 | 944 | */ |
68f21562 KM |
945 | if (oldparent != dp->i_number) |
946 | newparent = dp->i_number; | |
947 | if (doingdirectory && newparent) { | |
e6e1f8be KM |
948 | VOP_LOCK(fvp); |
949 | error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); | |
950 | VOP_UNLOCK(fvp); | |
48c3b6e8 | 951 | if (error) |
81552f0f | 952 | goto bad; |
655da945 | 953 | if (xp != NULL) |
031fd966 | 954 | ufs_iput(xp); |
e6e1f8be | 955 | if (error = ufs_checkpath(ip, dp, tcnp->cn_cred)) |
655da945 | 956 | goto out; |
e6e1f8be | 957 | if ((tcnp->cn_flags & SAVESTART) == 0) |
655da945 | 958 | panic("ufs_rename: lost to startdir"); |
5e03b55d | 959 | p->p_spare[1]--; |
e6e1f8be | 960 | if (error = relookup(tdvp, &tvp, tcnp)) |
655da945 | 961 | goto out; |
e6e1f8be | 962 | dp = VTOI(tdvp); |
655da945 | 963 | xp = NULL; |
e6e1f8be KM |
964 | if (tvp) |
965 | xp = VTOI(tvp); | |
81552f0f | 966 | } |
4f083fd7 SL |
967 | /* |
968 | * 2) If target doesn't exist, link the target | |
969 | * to the source and unlink the source. | |
970 | * Otherwise, rewrite the target directory | |
971 | * entry to reference the source inode and | |
972 | * expunge the original entry's existence. | |
973 | */ | |
4f083fd7 | 974 | if (xp == NULL) { |
7188ac27 KM |
975 | if (dp->i_dev != ip->i_dev) |
976 | panic("rename: EXDEV"); | |
4f083fd7 | 977 | /* |
68f21562 KM |
978 | * Account for ".." in new directory. |
979 | * When source and destination have the same | |
980 | * parent we don't fool with the link count. | |
4f083fd7 | 981 | */ |
68f21562 | 982 | if (doingdirectory && newparent) { |
38285224 | 983 | if ((nlink_t)dp->i_nlink >= LINK_MAX) { |
986aedaa KM |
984 | error = EMLINK; |
985 | goto bad; | |
986 | } | |
4f083fd7 SL |
987 | dp->i_nlink++; |
988 | dp->i_flag |= ICHG; | |
c59af027 | 989 | if (error = VOP_UPDATE(ITOV(dp), &time, &time, 1)) |
986aedaa | 990 | goto bad; |
4f083fd7 | 991 | } |
e6e1f8be | 992 | if (error = ufs_direnter(ip, tdvp, tcnp)) { |
394d67a8 KM |
993 | if (doingdirectory && newparent) { |
994 | dp->i_nlink--; | |
995 | dp->i_flag |= ICHG; | |
c59af027 | 996 | (void)VOP_UPDATE(ITOV(dp), &time, &time, 1); |
394d67a8 KM |
997 | } |
998 | goto bad; | |
999 | } | |
031fd966 | 1000 | ufs_iput(dp); |
4f083fd7 | 1001 | } else { |
7188ac27 KM |
1002 | if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) |
1003 | panic("rename: EXDEV"); | |
e69c3c9c SL |
1004 | /* |
1005 | * Short circuit rename(foo, foo). | |
1006 | */ | |
1007 | if (xp->i_number == ip->i_number) | |
7188ac27 | 1008 | panic("rename: same file"); |
80cee150 JB |
1009 | /* |
1010 | * If the parent directory is "sticky", then the user must | |
1011 | * own the parent directory, or the destination of the rename, | |
1012 | * otherwise the destination may not be changed (except by | |
1013 | * root). This implements append-only directories. | |
1014 | */ | |
e6e1f8be KM |
1015 | if ((dp->i_mode & ISVTX) && tcnp->cn_cred->cr_uid != 0 && |
1016 | tcnp->cn_cred->cr_uid != dp->i_uid && | |
1017 | xp->i_uid != tcnp->cn_cred->cr_uid) { | |
80cee150 JB |
1018 | error = EPERM; |
1019 | goto bad; | |
1020 | } | |
4f083fd7 | 1021 | /* |
655da945 KM |
1022 | * Target must be empty if a directory and have no links |
1023 | * to it. Also, ensure source and target are compatible | |
1024 | * (both directories, or both not directories). | |
4f083fd7 SL |
1025 | */ |
1026 | if ((xp->i_mode&IFMT) == IFDIR) { | |
e6e1f8be | 1027 | if (!ufs_dirempty(xp, dp->i_number, tcnp->cn_cred) || |
7188ac27 | 1028 | xp->i_nlink > 2) { |
a5390dce | 1029 | error = ENOTEMPTY; |
4f083fd7 SL |
1030 | goto bad; |
1031 | } | |
1032 | if (!doingdirectory) { | |
a5390dce | 1033 | error = ENOTDIR; |
4f083fd7 SL |
1034 | goto bad; |
1035 | } | |
7188ac27 | 1036 | cache_purge(ITOV(dp)); |
4f083fd7 | 1037 | } else if (doingdirectory) { |
a5390dce | 1038 | error = EISDIR; |
4f083fd7 SL |
1039 | goto bad; |
1040 | } | |
e6e1f8be | 1041 | if (error = ufs_dirrewrite(dp, ip, tcnp)) |
7188ac27 | 1042 | goto bad; |
a62786b9 KM |
1043 | /* |
1044 | * If the target directory is in the same | |
1045 | * directory as the source directory, | |
1046 | * decrement the link count on the parent | |
1047 | * of the target directory. | |
1048 | */ | |
1049 | if (doingdirectory && !newparent) { | |
1050 | dp->i_nlink--; | |
1051 | dp->i_flag |= ICHG; | |
1052 | } | |
c59af027 | 1053 | ufs_iput(dp); |
4f083fd7 | 1054 | /* |
a5390dce SL |
1055 | * Adjust the link count of the target to |
1056 | * reflect the dirrewrite above. If this is | |
1057 | * a directory it is empty and there are | |
1058 | * no links to it, so we can squash the inode and | |
1059 | * any space associated with it. We disallowed | |
1060 | * renaming over top of a directory with links to | |
68f21562 KM |
1061 | * it above, as the remaining link would point to |
1062 | * a directory without "." or ".." entries. | |
4f083fd7 | 1063 | */ |
a5390dce | 1064 | xp->i_nlink--; |
4f083fd7 | 1065 | if (doingdirectory) { |
a5390dce SL |
1066 | if (--xp->i_nlink != 0) |
1067 | panic("rename: linked directory"); | |
422c9c21 | 1068 | error = VOP_TRUNCATE(ITOV(xp), (off_t)0, IO_SYNC, |
69021bc5 | 1069 | tcnp->cn_cred, tcnp->cn_proc); |
a5390dce | 1070 | } |
4f083fd7 | 1071 | xp->i_flag |= ICHG; |
031fd966 | 1072 | ufs_iput(xp); |
31db12cb | 1073 | xp = NULL; |
4f083fd7 SL |
1074 | } |
1075 | ||
1076 | /* | |
1077 | * 3) Unlink the source. | |
1078 | */ | |
655da945 | 1079 | unlinkit: |
e6e1f8be KM |
1080 | fcnp->cn_flags &= ~MODMASK; |
1081 | fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; | |
1082 | if ((fcnp->cn_flags & SAVESTART) == 0) | |
655da945 | 1083 | panic("ufs_rename: lost from startdir"); |
5e03b55d | 1084 | p->p_spare[1]--; |
e6e1f8be KM |
1085 | (void) relookup(fdvp, &fvp, fcnp); |
1086 | if (fvp != NULL) { | |
1087 | xp = VTOI(fvp); | |
1088 | dp = VTOI(fdvp); | |
7188ac27 | 1089 | } else { |
d9d75b8f KM |
1090 | /* |
1091 | * From name has disappeared. | |
1092 | */ | |
1093 | if (doingdirectory) | |
1094 | panic("rename: lost dir entry"); | |
1095 | vrele(ITOV(ip)); | |
1096 | return (0); | |
7188ac27 | 1097 | } |
4f083fd7 | 1098 | /* |
7188ac27 | 1099 | * Ensure that the directory entry still exists and has not |
68f21562 KM |
1100 | * changed while the new name has been entered. If the source is |
1101 | * a file then the entry may have been unlinked or renamed. In | |
1102 | * either case there is no further work to be done. If the source | |
1103 | * is a directory then it cannot have been rmdir'ed; its link | |
1104 | * count of three would cause a rmdir to fail with ENOTEMPTY. | |
7188ac27 | 1105 | * The IRENAME flag ensures that it cannot be moved by another |
68f21562 | 1106 | * rename. |
4f083fd7 | 1107 | */ |
4f1a9037 | 1108 | if (xp != ip) { |
68f21562 | 1109 | if (doingdirectory) |
4f1a9037 | 1110 | panic("rename: lost dir entry"); |
68f21562 | 1111 | } else { |
4f083fd7 | 1112 | /* |
68f21562 KM |
1113 | * If the source is a directory with a |
1114 | * new parent, the link count of the old | |
1115 | * parent directory must be decremented | |
1116 | * and ".." set to point to the new parent. | |
4f083fd7 | 1117 | */ |
68f21562 | 1118 | if (doingdirectory && newparent) { |
4f083fd7 SL |
1119 | dp->i_nlink--; |
1120 | dp->i_flag |= ICHG; | |
86cdabf6 | 1121 | error = vn_rdwr(UIO_READ, ITOV(xp), (caddr_t)&dirbuf, |
7188ac27 | 1122 | sizeof (struct dirtemplate), (off_t)0, |
86cdabf6 | 1123 | UIO_SYSSPACE, IO_NODELOCKED, |
e6e1f8be | 1124 | tcnp->cn_cred, (int *)0, (struct proc *)0); |
68f21562 KM |
1125 | if (error == 0) { |
1126 | if (dirbuf.dotdot_namlen != 2 || | |
1127 | dirbuf.dotdot_name[0] != '.' || | |
1128 | dirbuf.dotdot_name[1] != '.') { | |
362d7f3b | 1129 | ufs_dirbad(xp, (doff_t)12, |
031fd966 | 1130 | "rename: mangled dir"); |
68f21562 KM |
1131 | } else { |
1132 | dirbuf.dotdot_ino = newparent; | |
86cdabf6 | 1133 | (void) vn_rdwr(UIO_WRITE, ITOV(xp), |
68f21562 KM |
1134 | (caddr_t)&dirbuf, |
1135 | sizeof (struct dirtemplate), | |
93e273b9 | 1136 | (off_t)0, UIO_SYSSPACE, |
86cdabf6 | 1137 | IO_NODELOCKED|IO_SYNC, |
e6e1f8be | 1138 | tcnp->cn_cred, (int *)0, |
5b169cb7 | 1139 | (struct proc *)0); |
7188ac27 | 1140 | cache_purge(ITOV(dp)); |
68f21562 KM |
1141 | } |
1142 | } | |
4f083fd7 | 1143 | } |
e6e1f8be | 1144 | error = ufs_dirremove(fdvp, fcnp); |
7188ac27 | 1145 | if (!error) { |
68f21562 KM |
1146 | xp->i_nlink--; |
1147 | xp->i_flag |= ICHG; | |
4f083fd7 | 1148 | } |
68f21562 | 1149 | xp->i_flag &= ~IRENAME; |
4f083fd7 | 1150 | } |
4f083fd7 | 1151 | if (dp) |
7188ac27 | 1152 | vput(ITOV(dp)); |
68f21562 | 1153 | if (xp) |
7188ac27 KM |
1154 | vput(ITOV(xp)); |
1155 | vrele(ITOV(ip)); | |
1156 | return (error); | |
a5390dce | 1157 | |
4f083fd7 | 1158 | bad: |
4f083fd7 | 1159 | if (xp) |
7188ac27 KM |
1160 | vput(ITOV(xp)); |
1161 | vput(ITOV(dp)); | |
4f083fd7 SL |
1162 | out: |
1163 | ip->i_nlink--; | |
1164 | ip->i_flag |= ICHG; | |
7188ac27 KM |
1165 | vrele(ITOV(ip)); |
1166 | return (error); | |
64d3a787 | 1167 | } |
88a7a62a SL |
1168 | |
1169 | /* | |
1170 | * A virgin directory (no blushing please). | |
1171 | */ | |
031fd966 | 1172 | static struct dirtemplate mastertemplate = { |
88a7a62a SL |
1173 | 0, 12, 1, ".", |
1174 | 0, DIRBLKSIZ - 12, 2, ".." | |
1175 | }; | |
1176 | ||
1177 | /* | |
1178 | * Mkdir system call | |
1179 | */ | |
031fd966 | 1180 | int |
e6e1f8be | 1181 | ufs_mkdir(ap) |
69021bc5 KM |
1182 | struct vop_mkdir_args /* { |
1183 | struct vnode *a_dvp; | |
1184 | struct vnode **a_vpp; | |
1185 | struct componentname *a_cnp; | |
1186 | struct vattr *a_vap; | |
1187 | } */ *ap; | |
88a7a62a | 1188 | { |
9342689a JH |
1189 | USES_VOP_UPDATE; |
1190 | USES_VOP_VALLOC; | |
1191 | USES_VOP_VFREE; | |
e6e1f8be KM |
1192 | register struct vnode *dvp = ap->a_dvp; |
1193 | register struct vattr *vap = ap->a_vap; | |
1194 | register struct componentname *cnp = ap->a_cnp; | |
88a7a62a | 1195 | register struct inode *ip, *dp; |
c59af027 | 1196 | struct vnode *tvp; |
88a7a62a | 1197 | struct dirtemplate dirtemplate; |
7188ac27 KM |
1198 | int error; |
1199 | int dmode; | |
1200 | ||
38285224 | 1201 | #ifdef DIAGNOSTIC |
e6e1f8be | 1202 | if ((cnp->cn_flags & HASBUF) == 0) |
655da945 KM |
1203 | panic("ufs_mkdir: no name"); |
1204 | #endif | |
e6e1f8be | 1205 | dp = VTOI(dvp); |
38285224 | 1206 | if ((nlink_t)dp->i_nlink >= LINK_MAX) { |
e6e1f8be | 1207 | free(cnp->cn_pnbuf, M_NAMEI); |
031fd966 | 1208 | ufs_iput(dp); |
986aedaa KM |
1209 | return (EMLINK); |
1210 | } | |
e6e1f8be | 1211 | dmode = vap->va_mode&0777; |
7188ac27 | 1212 | dmode |= IFDIR; |
88a7a62a | 1213 | /* |
655da945 KM |
1214 | * Must simulate part of maknode here to acquire the inode, but |
1215 | * not have it entered in the parent directory. The entry is made | |
1216 | * later after writing "." and ".." entries. | |
88a7a62a | 1217 | */ |
e6e1f8be KM |
1218 | if (error = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp)) { |
1219 | free(cnp->cn_pnbuf, M_NAMEI); | |
031fd966 | 1220 | ufs_iput(dp); |
7188ac27 | 1221 | return (error); |
88a7a62a | 1222 | } |
c59af027 | 1223 | ip = VTOI(tvp); |
e6e1f8be | 1224 | ip->i_uid = cnp->cn_cred->cr_uid; |
4b61628b | 1225 | ip->i_gid = dp->i_gid; |
88a7a62a | 1226 | #ifdef QUOTA |
4b61628b | 1227 | if ((error = getinoquota(ip)) || |
e6e1f8be KM |
1228 | (error = chkiq(ip, 1, cnp->cn_cred, 0))) { |
1229 | free(cnp->cn_pnbuf, M_NAMEI); | |
c59af027 | 1230 | VOP_VFREE(tvp, ip->i_number, dmode); |
031fd966 KB |
1231 | ufs_iput(ip); |
1232 | ufs_iput(dp); | |
4b61628b KM |
1233 | return (error); |
1234 | } | |
88a7a62a SL |
1235 | #endif |
1236 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
1237 | ip->i_mode = dmode; |
1238 | ITOV(ip)->v_type = VDIR; /* Rest init'd in iget() */ | |
88a7a62a | 1239 | ip->i_nlink = 2; |
c59af027 | 1240 | error = VOP_UPDATE(ITOV(ip), &time, &time, 1); |
88a7a62a SL |
1241 | |
1242 | /* | |
1243 | * Bump link count in parent directory | |
1244 | * to reflect work done below. Should | |
1245 | * be done before reference is created | |
1246 | * so reparation is possible if we crash. | |
1247 | */ | |
1248 | dp->i_nlink++; | |
1249 | dp->i_flag |= ICHG; | |
c59af027 | 1250 | if (error = VOP_UPDATE(ITOV(dp), &time, &time, 1)) |
394d67a8 | 1251 | goto bad; |
88a7a62a | 1252 | |
031fd966 | 1253 | /* Initialize directory with "." and ".." from static template. */ |
88a7a62a SL |
1254 | dirtemplate = mastertemplate; |
1255 | dirtemplate.dot_ino = ip->i_number; | |
1256 | dirtemplate.dotdot_ino = dp->i_number; | |
86cdabf6 | 1257 | error = vn_rdwr(UIO_WRITE, ITOV(ip), (caddr_t)&dirtemplate, |
5b169cb7 | 1258 | sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, |
e6e1f8be | 1259 | IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (int *)0, (struct proc *)0); |
7188ac27 | 1260 | if (error) { |
88a7a62a SL |
1261 | dp->i_nlink--; |
1262 | dp->i_flag |= ICHG; | |
1263 | goto bad; | |
1264 | } | |
e6e1f8be | 1265 | if (DIRBLKSIZ > VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) |
031fd966 KB |
1266 | panic("ufs_mkdir: blksize"); /* XXX should grow with balloc() */ |
1267 | else { | |
23de9f20 | 1268 | ip->i_size = DIRBLKSIZ; |
15365e07 KM |
1269 | ip->i_flag |= ICHG; |
1270 | } | |
031fd966 KB |
1271 | |
1272 | /* Directory set up, now install it's entry in the parent directory. */ | |
e6e1f8be | 1273 | if (error = ufs_direnter(ip, dvp, cnp)) { |
2a5d2f56 KM |
1274 | dp->i_nlink--; |
1275 | dp->i_flag |= ICHG; | |
88a7a62a SL |
1276 | } |
1277 | bad: | |
1278 | /* | |
c59af027 KM |
1279 | * No need to do an explicit VOP_TRUNCATE here, vrele will do this |
1280 | * for us because we set the link count to 0. | |
88a7a62a | 1281 | */ |
7188ac27 | 1282 | if (error) { |
88a7a62a SL |
1283 | ip->i_nlink = 0; |
1284 | ip->i_flag |= ICHG; | |
031fd966 | 1285 | ufs_iput(ip); |
cbcdacd6 | 1286 | } else |
e1b76915 | 1287 | *ap->a_vpp = ITOV(ip); |
e6e1f8be | 1288 | FREE(cnp->cn_pnbuf, M_NAMEI); |
031fd966 | 1289 | ufs_iput(dp); |
7188ac27 | 1290 | return (error); |
88a7a62a SL |
1291 | } |
1292 | ||
1293 | /* | |
1294 | * Rmdir system call. | |
1295 | */ | |
031fd966 | 1296 | int |
e6e1f8be | 1297 | ufs_rmdir(ap) |
69021bc5 KM |
1298 | struct vop_rmdir_args /* { |
1299 | struct vnodeop_desc *a_desc; | |
1300 | struct vnode *a_dvp; | |
1301 | struct vnode *a_vp; | |
1302 | struct componentname *a_cnp; | |
1303 | } */ *ap; | |
88a7a62a | 1304 | { |
9342689a | 1305 | USES_VOP_TRUNCATE; |
e6e1f8be KM |
1306 | register struct vnode *dvp = ap->a_dvp; |
1307 | register struct componentname *cnp = ap->a_cnp; | |
88a7a62a | 1308 | register struct inode *ip, *dp; |
031fd966 | 1309 | int error; |
7188ac27 | 1310 | |
e1b76915 | 1311 | ip = VTOI(ap->a_vp); |
e6e1f8be | 1312 | dp = VTOI(dvp); |
88a7a62a SL |
1313 | /* |
1314 | * No rmdir "." please. | |
1315 | */ | |
1316 | if (dp == ip) { | |
e6e1f8be | 1317 | vrele(dvp); |
031fd966 | 1318 | ufs_iput(ip); |
7188ac27 | 1319 | return (EINVAL); |
88a7a62a SL |
1320 | } |
1321 | /* | |
1322 | * Verify the directory is empty (and valid). | |
1323 | * (Rmdir ".." won't be valid since | |
1324 | * ".." will contain a reference to | |
1325 | * the current directory and thus be | |
1326 | * non-empty.) | |
1327 | */ | |
031fd966 KB |
1328 | error = 0; |
1329 | if (ip->i_nlink != 2 || | |
e6e1f8be | 1330 | !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) { |
7188ac27 | 1331 | error = ENOTEMPTY; |
88a7a62a SL |
1332 | goto out; |
1333 | } | |
1334 | /* | |
1335 | * Delete reference to directory before purging | |
1336 | * inode. If we crash in between, the directory | |
1337 | * will be reattached to lost+found, | |
1338 | */ | |
e6e1f8be | 1339 | if (error = ufs_dirremove(dvp, cnp)) |
88a7a62a SL |
1340 | goto out; |
1341 | dp->i_nlink--; | |
1342 | dp->i_flag |= ICHG; | |
e6e1f8be | 1343 | cache_purge(dvp); |
031fd966 | 1344 | ufs_iput(dp); |
e6e1f8be | 1345 | dvp = NULL; |
88a7a62a SL |
1346 | /* |
1347 | * Truncate inode. The only stuff left | |
1348 | * in the directory is "." and "..". The | |
1349 | * "." reference is inconsequential since | |
1350 | * we're quashing it. The ".." reference | |
1351 | * has already been adjusted above. We've | |
1352 | * removed the "." reference and the reference | |
1353 | * in the parent directory, but there may be | |
1354 | * other hard links so decrement by 2 and | |
1355 | * worry about them later. | |
1356 | */ | |
1357 | ip->i_nlink -= 2; | |
69021bc5 KM |
1358 | error = VOP_TRUNCATE(ap->a_vp, (off_t)0, IO_SYNC, cnp->cn_cred, |
1359 | cnp->cn_proc); | |
7188ac27 | 1360 | cache_purge(ITOV(ip)); |
88a7a62a | 1361 | out: |
e6e1f8be | 1362 | if (dvp) |
031fd966 KB |
1363 | ufs_iput(dp); |
1364 | ufs_iput(ip); | |
7188ac27 | 1365 | return (error); |
88a7a62a SL |
1366 | } |
1367 | ||
7188ac27 KM |
1368 | /* |
1369 | * symlink -- make a symbolic link | |
1370 | */ | |
031fd966 | 1371 | int |
e6e1f8be | 1372 | ufs_symlink(ap) |
69021bc5 KM |
1373 | struct vop_symlink_args /* { |
1374 | struct vnode *a_dvp; | |
1375 | struct vnode **a_vpp; | |
1376 | struct componentname *a_cnp; | |
1377 | struct vattr *a_vap; | |
1378 | char *a_target; | |
1379 | } */ *ap; | |
7188ac27 | 1380 | { |
2a7acb0a KM |
1381 | register struct vnode *vp, **vpp = ap->a_vpp; |
1382 | register struct inode *ip; | |
1383 | int len, error; | |
7188ac27 | 1384 | |
e6e1f8be KM |
1385 | if (error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, |
1386 | vpp, ap->a_cnp)) | |
7188ac27 | 1387 | return (error); |
2a7acb0a KM |
1388 | vp = *vpp; |
1389 | len = strlen(ap->a_target); | |
1390 | if (len < vp->v_mount->mnt_maxsymlinklen) { | |
1391 | ip = VTOI(vp); | |
1392 | bcopy(ap->a_target, (char *)ip->i_shortlink, len); | |
1393 | ip->i_size = len; | |
1394 | ip->i_flag |= IUPD|ICHG; | |
1395 | } else | |
1396 | error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, | |
1397 | UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, (int *)0, | |
1398 | (struct proc *)0); | |
1399 | vput(vp); | |
7188ac27 KM |
1400 | return (error); |
1401 | } | |
1402 | ||
1403 | /* | |
d8ba9f9d KM |
1404 | * Vnode op for reading directories. |
1405 | * | |
1406 | * The routine below assumes that the on-disk format of a directory | |
1407 | * is the same as that defined by <sys/dirent.h>. If the on-disk | |
1408 | * format changes, then it will be necessary to do a conversion | |
1409 | * from the on-disk format that read returns to the format defined | |
1410 | * by <sys/dirent.h>. | |
7188ac27 | 1411 | */ |
031fd966 | 1412 | int |
e6e1f8be | 1413 | ufs_readdir(ap) |
69021bc5 KM |
1414 | struct vop_readdir_args /* { |
1415 | struct vnode *a_vp; | |
1416 | struct uio *a_uio; | |
1417 | struct ucred *a_cred; | |
1418 | } */ *ap; | |
88a7a62a | 1419 | { |
9342689a | 1420 | USES_VOP_READ; |
e6e1f8be | 1421 | register struct uio *uio = ap->a_uio; |
86cdabf6 | 1422 | int count, lost, error; |
88a7a62a | 1423 | |
e6e1f8be | 1424 | count = uio->uio_resid; |
7188ac27 | 1425 | count &= ~(DIRBLKSIZ - 1); |
e6e1f8be KM |
1426 | lost = uio->uio_resid - count; |
1427 | if (count < DIRBLKSIZ || (uio->uio_offset & (DIRBLKSIZ -1))) | |
7188ac27 | 1428 | return (EINVAL); |
e6e1f8be KM |
1429 | uio->uio_resid = count; |
1430 | uio->uio_iov->iov_len = count; | |
1431 | error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred); | |
1432 | uio->uio_resid += lost; | |
7188ac27 KM |
1433 | return (error); |
1434 | } | |
1435 | ||
1436 | /* | |
1437 | * Return target name of a symbolic link | |
1438 | */ | |
031fd966 | 1439 | int |
e6e1f8be | 1440 | ufs_readlink(ap) |
69021bc5 KM |
1441 | struct vop_readlink_args /* { |
1442 | struct vnode *a_vp; | |
1443 | struct uio *a_uio; | |
1444 | struct ucred *a_cred; | |
1445 | } */ *ap; | |
7188ac27 | 1446 | { |
2a7acb0a KM |
1447 | register struct vnode *vp = ap->a_vp; |
1448 | register struct inode *ip = VTOI(vp); | |
9342689a | 1449 | USES_VOP_READ; |
7188ac27 | 1450 | |
2a7acb0a KM |
1451 | if (ip->i_size < vp->v_mount->mnt_maxsymlinklen) { |
1452 | uiomove((char *)ip->i_shortlink, (int)ip->i_size, ap->a_uio); | |
1453 | return (0); | |
1454 | } | |
1455 | return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); | |
7188ac27 KM |
1456 | } |
1457 | ||
1458 | /* | |
1459 | * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually | |
655da945 | 1460 | * done. If a buffer has been saved in anticipation of a CREATE, delete it. |
7188ac27 | 1461 | */ |
66955caf | 1462 | /* ARGSUSED */ |
031fd966 | 1463 | int |
e6e1f8be | 1464 | ufs_abortop(ap) |
69021bc5 KM |
1465 | struct vop_abortop_args /* { |
1466 | struct vnode *a_dvp; | |
1467 | struct componentname *a_cnp; | |
1468 | } */ *ap; | |
7188ac27 | 1469 | { |
e1b76915 JH |
1470 | if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) |
1471 | FREE(ap->a_cnp->cn_pnbuf, M_NAMEI); | |
66955caf | 1472 | return (0); |
7188ac27 KM |
1473 | } |
1474 | ||
1c3ebc10 KM |
1475 | /* |
1476 | * Lock an inode. | |
1477 | */ | |
031fd966 | 1478 | int |
e6e1f8be | 1479 | ufs_lock(ap) |
69021bc5 KM |
1480 | struct vop_lock_args /* { |
1481 | struct vnode *a_vp; | |
1482 | } */ *ap; | |
7188ac27 | 1483 | { |
e1b76915 | 1484 | register struct inode *ip = VTOI(ap->a_vp); |
7188ac27 KM |
1485 | |
1486 | ILOCK(ip); | |
1487 | return (0); | |
1488 | } | |
1489 | ||
1c3ebc10 KM |
1490 | /* |
1491 | * Unlock an inode. | |
1492 | */ | |
031fd966 | 1493 | int |
e6e1f8be | 1494 | ufs_unlock(ap) |
69021bc5 KM |
1495 | struct vop_unlock_args /* { |
1496 | struct vnode *a_vp; | |
1497 | } */ *ap; | |
7188ac27 | 1498 | { |
e1b76915 | 1499 | register struct inode *ip = VTOI(ap->a_vp); |
7188ac27 KM |
1500 | |
1501 | if (!(ip->i_flag & ILOCKED)) | |
1502 | panic("ufs_unlock NOT LOCKED"); | |
1503 | IUNLOCK(ip); | |
1504 | return (0); | |
1505 | } | |
1506 | ||
1c3ebc10 KM |
1507 | /* |
1508 | * Check for a locked inode. | |
1509 | */ | |
031fd966 | 1510 | int |
e6e1f8be | 1511 | ufs_islocked(ap) |
69021bc5 KM |
1512 | struct vop_islocked_args /* { |
1513 | struct vnode *a_vp; | |
1514 | } */ *ap; | |
1c3ebc10 KM |
1515 | { |
1516 | ||
e1b76915 | 1517 | if (VTOI(ap->a_vp)->i_flag & ILOCKED) |
1c3ebc10 KM |
1518 | return (1); |
1519 | return (0); | |
1520 | } | |
1521 | ||
88a7a62a | 1522 | /* |
4f1ff475 KM |
1523 | * Calculate the logical to physical mapping if not done already, |
1524 | * then call the device strategy routine. | |
88a7a62a | 1525 | */ |
031fd966 | 1526 | int |
e6e1f8be | 1527 | ufs_strategy(ap) |
69021bc5 KM |
1528 | struct vop_strategy_args /* { |
1529 | struct buf *a_bp; | |
1530 | } */ *ap; | |
88a7a62a | 1531 | { |
9342689a | 1532 | USES_VOP_BMAP; |
e6e1f8be KM |
1533 | register struct buf *bp = ap->a_bp; |
1534 | register struct vnode *vp = bp->b_vp; | |
031fd966 | 1535 | register struct inode *ip; |
e16fa59e KM |
1536 | int error; |
1537 | ||
e6e1f8be KM |
1538 | ip = VTOI(vp); |
1539 | if (vp->v_type == VBLK || vp->v_type == VCHR) | |
e16fa59e | 1540 | panic("ufs_strategy: spec"); |
e6e1f8be | 1541 | if (bp->b_blkno == bp->b_lblkno) { |
c59af027 | 1542 | if (error = |
e6e1f8be KM |
1543 | VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno)) { |
1544 | bp->b_error = error; | |
1545 | bp->b_flags |= B_ERROR; | |
1546 | biodone(bp); | |
e16fa59e | 1547 | return (error); |
dd1d1daf | 1548 | } |
e6e1f8be KM |
1549 | if ((long)bp->b_blkno == -1) |
1550 | clrbuf(bp); | |
e16fa59e | 1551 | } |
e6e1f8be KM |
1552 | if ((long)bp->b_blkno == -1) { |
1553 | biodone(bp); | |
e16fa59e | 1554 | return (0); |
20aa076b | 1555 | } |
e16fa59e | 1556 | vp = ip->i_devvp; |
e6e1f8be | 1557 | bp->b_dev = vp->v_rdev; |
ea460dfe | 1558 | VOCALL (vp->v_op, VOFFSET(vop_strategy), ap); |
7188ac27 KM |
1559 | return (0); |
1560 | } | |
88a7a62a | 1561 | |
e16fa59e KM |
1562 | /* |
1563 | * Print out the contents of an inode. | |
1564 | */ | |
031fd966 | 1565 | int |
e6e1f8be | 1566 | ufs_print(ap) |
69021bc5 KM |
1567 | struct vop_print_args /* { |
1568 | struct vnode *a_vp; | |
1569 | } */ *ap; | |
e16fa59e | 1570 | { |
e6e1f8be KM |
1571 | register struct vnode *vp = ap->a_vp; |
1572 | register struct inode *ip = VTOI(vp); | |
e16fa59e | 1573 | |
a8f829ed KM |
1574 | printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number, |
1575 | major(ip->i_dev), minor(ip->i_dev)); | |
1576 | #ifdef FIFO | |
e6e1f8be KM |
1577 | if (vp->v_type == VFIFO) |
1578 | fifo_printinfo(vp); | |
a8f829ed KM |
1579 | #endif /* FIFO */ |
1580 | printf("%s\n", (ip->i_flag & ILOCKED) ? " (LOCKED)" : ""); | |
4a8fb1bb | 1581 | if (ip->i_lockholder == 0) |
031fd966 | 1582 | return (0); |
4a8fb1bb KM |
1583 | printf("\towner pid %d", ip->i_lockholder); |
1584 | if (ip->i_lockwaiter) | |
1585 | printf(" waiting pid %d", ip->i_lockwaiter); | |
96bae3e0 | 1586 | printf("\n"); |
031fd966 | 1587 | return (0); |
e16fa59e KM |
1588 | } |
1589 | ||
24a31b70 KM |
1590 | /* |
1591 | * Read wrapper for special devices. | |
1592 | */ | |
031fd966 | 1593 | int |
e6e1f8be | 1594 | ufsspec_read(ap) |
69021bc5 KM |
1595 | struct vop_read_args /* { |
1596 | struct vnode *a_vp; | |
1597 | struct uio *a_uio; | |
1598 | int a_ioflag; | |
1599 | struct ucred *a_cred; | |
1600 | } */ *ap; | |
24a31b70 | 1601 | { |
ea460dfe | 1602 | extern int (**spec_vnodeop_p)(); |
24a31b70 KM |
1603 | |
1604 | /* | |
1605 | * Set access flag. | |
1606 | */ | |
e1b76915 | 1607 | VTOI(ap->a_vp)->i_flag |= IACC; |
ea460dfe | 1608 | return (VOCALL (spec_vnodeop_p, VOFFSET(vop_read), ap)); |
24a31b70 KM |
1609 | } |
1610 | ||
1611 | /* | |
1612 | * Write wrapper for special devices. | |
1613 | */ | |
031fd966 | 1614 | int |
e6e1f8be | 1615 | ufsspec_write(ap) |
69021bc5 KM |
1616 | struct vop_write_args /* { |
1617 | struct vnode *a_vp; | |
1618 | struct uio *a_uio; | |
1619 | int a_ioflag; | |
1620 | struct ucred *a_cred; | |
1621 | } */ *ap; | |
24a31b70 | 1622 | { |
ea460dfe | 1623 | extern int (**spec_vnodeop_p)(); |
24a31b70 KM |
1624 | |
1625 | /* | |
1626 | * Set update and change flags. | |
1627 | */ | |
e1b76915 | 1628 | VTOI(ap->a_vp)->i_flag |= IUPD|ICHG; |
ea460dfe | 1629 | return (VOCALL (spec_vnodeop_p, VOFFSET(vop_write), ap)); |
24a31b70 KM |
1630 | } |
1631 | ||
1632 | /* | |
1633 | * Close wrapper for special devices. | |
1634 | * | |
1635 | * Update the times on the inode then do device close. | |
1636 | */ | |
031fd966 | 1637 | int |
e6e1f8be | 1638 | ufsspec_close(ap) |
69021bc5 KM |
1639 | struct vop_close_args /* { |
1640 | struct vnode *a_vp; | |
1641 | int a_fflag; | |
1642 | struct ucred *a_cred; | |
1643 | struct proc *a_p; | |
1644 | } */ *ap; | |
24a31b70 | 1645 | { |
ea460dfe | 1646 | extern int (**spec_vnodeop_p)(); |
e1b76915 | 1647 | register struct inode *ip = VTOI(ap->a_vp); |
24a31b70 | 1648 | |
e1b76915 | 1649 | if (ap->a_vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
24a31b70 | 1650 | ITIMES(ip, &time, &time); |
ea460dfe | 1651 | return (VOCALL (spec_vnodeop_p, VOFFSET(vop_close), ap)); |
24a31b70 KM |
1652 | } |
1653 | ||
d1c43d7f KM |
1654 | #ifdef FIFO |
1655 | /* | |
1656 | * Read wrapper for fifo's | |
1657 | */ | |
031fd966 | 1658 | int |
e6e1f8be | 1659 | ufsfifo_read(ap) |
69021bc5 KM |
1660 | struct vop_read_args /* { |
1661 | struct vnode *a_vp; | |
1662 | struct uio *a_uio; | |
1663 | int a_ioflag; | |
1664 | struct ucred *a_cred; | |
1665 | } */ *ap; | |
d1c43d7f | 1666 | { |
ea460dfe | 1667 | extern int (**fifo_vnodeop_p)(); |
d1c43d7f KM |
1668 | |
1669 | /* | |
1670 | * Set access flag. | |
1671 | */ | |
e1b76915 | 1672 | VTOI(ap->a_vp)->i_flag |= IACC; |
ea460dfe | 1673 | return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_read), ap)); |
d1c43d7f KM |
1674 | } |
1675 | ||
1676 | /* | |
1677 | * Write wrapper for fifo's. | |
1678 | */ | |
031fd966 | 1679 | int |
e6e1f8be | 1680 | ufsfifo_write(ap) |
69021bc5 KM |
1681 | struct vop_write_args /* { |
1682 | struct vnode *a_vp; | |
1683 | struct uio *a_uio; | |
1684 | int a_ioflag; | |
1685 | struct ucred *a_cred; | |
1686 | } */ *ap; | |
d1c43d7f | 1687 | { |
ea460dfe | 1688 | extern int (**fifo_vnodeop_p)(); |
d1c43d7f KM |
1689 | |
1690 | /* | |
1691 | * Set update and change flags. | |
1692 | */ | |
e1b76915 | 1693 | VTOI(ap->a_vp)->i_flag |= IUPD|ICHG; |
ea460dfe | 1694 | return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_write), ap)); |
d1c43d7f KM |
1695 | } |
1696 | ||
1697 | /* | |
1698 | * Close wrapper for fifo's. | |
1699 | * | |
1700 | * Update the times on the inode then do device close. | |
1701 | */ | |
e6e1f8be | 1702 | ufsfifo_close(ap) |
69021bc5 KM |
1703 | struct vop_close_args /* { |
1704 | struct vnode *a_vp; | |
1705 | int a_fflag; | |
1706 | struct ucred *a_cred; | |
1707 | struct proc *a_p; | |
1708 | } */ *ap; | |
d1c43d7f | 1709 | { |
ea460dfe | 1710 | extern int (**fifo_vnodeop_p)(); |
e1b76915 | 1711 | register struct inode *ip = VTOI(ap->a_vp); |
d1c43d7f | 1712 | |
e1b76915 | 1713 | if (ap->a_vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
d1c43d7f | 1714 | ITIMES(ip, &time, &time); |
ea460dfe | 1715 | return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_close), ap)); |
d1c43d7f KM |
1716 | } |
1717 | #endif /* FIFO */ | |
1718 | ||
0b0bf936 KM |
1719 | /* |
1720 | * Advisory record locking support | |
1721 | */ | |
031fd966 | 1722 | int |
e6e1f8be | 1723 | ufs_advlock(ap) |
69021bc5 KM |
1724 | struct vop_advlock_args /* { |
1725 | struct vnode *a_vp; | |
1726 | caddr_t a_id; | |
1727 | int a_op; | |
1728 | struct flock *a_fl; | |
1729 | int a_flags; | |
1730 | } */ *ap; | |
0b0bf936 | 1731 | { |
e1b76915 | 1732 | register struct inode *ip = VTOI(ap->a_vp); |
e6e1f8be | 1733 | register struct flock *fl = ap->a_fl; |
0b0bf936 KM |
1734 | register struct lockf *lock; |
1735 | off_t start, end; | |
1736 | int error; | |
1737 | ||
1738 | /* | |
1739 | * Avoid the common case of unlocking when inode has no locks. | |
1740 | */ | |
1741 | if (ip->i_lockf == (struct lockf *)0) { | |
e1b76915 | 1742 | if (ap->a_op != F_SETLK) { |
e6e1f8be | 1743 | fl->l_type = F_UNLCK; |
0b0bf936 KM |
1744 | return (0); |
1745 | } | |
1746 | } | |
1747 | /* | |
1748 | * Convert the flock structure into a start and end. | |
1749 | */ | |
e6e1f8be | 1750 | switch (fl->l_whence) { |
0b0bf936 KM |
1751 | |
1752 | case SEEK_SET: | |
1753 | case SEEK_CUR: | |
1754 | /* | |
1755 | * Caller is responsible for adding any necessary offset | |
1756 | * when SEEK_CUR is used. | |
1757 | */ | |
e6e1f8be | 1758 | start = fl->l_start; |
0b0bf936 KM |
1759 | break; |
1760 | ||
1761 | case SEEK_END: | |
e6e1f8be | 1762 | start = ip->i_size + fl->l_start; |
0b0bf936 KM |
1763 | break; |
1764 | ||
1765 | default: | |
1766 | return (EINVAL); | |
1767 | } | |
1768 | if (start < 0) | |
1769 | return (EINVAL); | |
e6e1f8be | 1770 | if (fl->l_len == 0) |
0b0bf936 KM |
1771 | end = -1; |
1772 | else | |
e6e1f8be | 1773 | end = start + fl->l_len - 1; |
0b0bf936 KM |
1774 | /* |
1775 | * Create the lockf structure | |
1776 | */ | |
1777 | MALLOC(lock, struct lockf *, sizeof *lock, M_LOCKF, M_WAITOK); | |
1778 | lock->lf_start = start; | |
1779 | lock->lf_end = end; | |
e1b76915 | 1780 | lock->lf_id = ap->a_id; |
0b0bf936 | 1781 | lock->lf_inode = ip; |
e6e1f8be | 1782 | lock->lf_type = fl->l_type; |
0b0bf936 KM |
1783 | lock->lf_next = (struct lockf *)0; |
1784 | lock->lf_block = (struct lockf *)0; | |
e1b76915 | 1785 | lock->lf_flags = ap->a_flags; |
0b0bf936 KM |
1786 | /* |
1787 | * Do the requested operation. | |
1788 | */ | |
e1b76915 | 1789 | switch(ap->a_op) { |
0b0bf936 | 1790 | case F_SETLK: |
b9fc1077 | 1791 | return (lf_setlock(lock)); |
0b0bf936 KM |
1792 | |
1793 | case F_UNLCK: | |
b9fc1077 KM |
1794 | error = lf_clearlock(lock); |
1795 | FREE(lock, M_LOCKF); | |
1796 | return (error); | |
0b0bf936 KM |
1797 | |
1798 | case F_GETLK: | |
e6e1f8be | 1799 | error = lf_getlock(lock, fl); |
b9fc1077 KM |
1800 | FREE(lock, M_LOCKF); |
1801 | return (error); | |
0b0bf936 KM |
1802 | |
1803 | default: | |
1804 | free(lock, M_LOCKF); | |
1805 | return (EINVAL); | |
1806 | } | |
1807 | /* NOTREACHED */ | |
1808 | } | |
5b169cb7 KM |
1809 | |
1810 | /* | |
031fd966 KB |
1811 | * Initialize the vnode associated with a new inode, handle aliased |
1812 | * vnodes. | |
5b169cb7 | 1813 | */ |
031fd966 | 1814 | int |
c59af027 | 1815 | ufs_vinit(mntp, specops, fifoops, vpp) |
031fd966 | 1816 | struct mount *mntp; |
1d52469b JH |
1817 | int (**specops)(); |
1818 | int (**fifoops)(); | |
031fd966 KB |
1819 | struct vnode **vpp; |
1820 | { | |
1821 | struct inode *ip, *nip; | |
1822 | struct vnode *vp, *nvp; | |
9342689a | 1823 | extern int (**spec_vnodeop_p)(); |
031fd966 KB |
1824 | |
1825 | vp = *vpp; | |
1826 | ip = VTOI(vp); | |
1827 | switch(vp->v_type = IFTOVT(ip->i_mode)) { | |
1828 | case VCHR: | |
1829 | case VBLK: | |
c59af027 | 1830 | vp->v_op = specops; |
031fd966 | 1831 | if (nvp = checkalias(vp, ip->i_rdev, mntp)) { |
c59af027 | 1832 | /* |
4a8fb1bb | 1833 | * Discard unneeded vnode, but save its inode. |
c59af027 | 1834 | */ |
4a8fb1bb KM |
1835 | remque(ip); |
1836 | IUNLOCK(ip); | |
1837 | nvp->v_data = vp->v_data; | |
1838 | vp->v_data = NULL; | |
9342689a | 1839 | vp->v_op = spec_vnodeop_p; |
4a8fb1bb KM |
1840 | vrele(vp); |
1841 | vgone(vp); | |
c59af027 | 1842 | /* |
4a8fb1bb | 1843 | * Reinitialize aliased inode. |
c59af027 | 1844 | */ |
4a8fb1bb KM |
1845 | vp = nvp; |
1846 | ip->i_vnode = vp; | |
1847 | ufs_ihashins(ip); | |
031fd966 KB |
1848 | } |
1849 | break; | |
1850 | case VFIFO: | |
1851 | #ifdef FIFO | |
c59af027 | 1852 | vp->v_op = fifoops; |
031fd966 KB |
1853 | break; |
1854 | #else | |
1855 | return (EOPNOTSUPP); | |
1856 | #endif | |
1857 | } | |
031fd966 KB |
1858 | if (ip->i_number == ROOTINO) |
1859 | vp->v_flag |= VROOT; | |
1a3cb193 KM |
1860 | /* |
1861 | * Initialize modrev times | |
1862 | */ | |
1863 | SETHIGH(ip->i_modrev, mono_time.tv_sec); | |
1864 | SETLOW(ip->i_modrev, mono_time.tv_usec * 4294); | |
031fd966 KB |
1865 | *vpp = vp; |
1866 | return (0); | |
1867 | } | |
5b169cb7 | 1868 | |
031fd966 KB |
1869 | /* |
1870 | * Allocate a new inode. | |
1871 | */ | |
1872 | int | |
6e57e9ff | 1873 | ufs_makeinode(mode, dvp, vpp, cnp) |
031fd966 | 1874 | int mode; |
cfef4373 | 1875 | struct vnode *dvp; |
c59af027 | 1876 | struct vnode **vpp; |
cfef4373 | 1877 | struct componentname *cnp; |
031fd966 | 1878 | { |
9342689a JH |
1879 | USES_VOP_UPDATE; |
1880 | USES_VOP_VALLOC; | |
1881 | USES_VOP_VFREE; | |
031fd966 | 1882 | register struct inode *ip, *pdir; |
c59af027 | 1883 | struct vnode *tvp; |
031fd966 KB |
1884 | int error; |
1885 | ||
cfef4373 | 1886 | pdir = VTOI(dvp); |
38285224 | 1887 | #ifdef DIAGNOSTIC |
cfef4373 | 1888 | if ((cnp->cn_flags & HASBUF) == 0) |
031fd966 KB |
1889 | panic("ufs_makeinode: no name"); |
1890 | #endif | |
c59af027 | 1891 | *vpp = NULL; |
031fd966 KB |
1892 | if ((mode & IFMT) == 0) |
1893 | mode |= IFREG; | |
1894 | ||
cfef4373 JH |
1895 | if (error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) { |
1896 | free(cnp->cn_pnbuf, M_NAMEI); | |
031fd966 KB |
1897 | ufs_iput(pdir); |
1898 | return (error); | |
1899 | } | |
c59af027 | 1900 | ip = VTOI(tvp); |
cfef4373 | 1901 | ip->i_uid = cnp->cn_cred->cr_uid; |
031fd966 KB |
1902 | ip->i_gid = pdir->i_gid; |
1903 | #ifdef QUOTA | |
1904 | if ((error = getinoquota(ip)) || | |
cfef4373 JH |
1905 | (error = chkiq(ip, 1, cnp->cn_cred, 0))) { |
1906 | free(cnp->cn_pnbuf, M_NAMEI); | |
c59af027 | 1907 | VOP_VFREE(tvp, ip->i_number, mode); |
031fd966 KB |
1908 | ufs_iput(ip); |
1909 | ufs_iput(pdir); | |
1910 | return (error); | |
1911 | } | |
1912 | #endif | |
1913 | ip->i_flag |= IACC|IUPD|ICHG; | |
1914 | ip->i_mode = mode; | |
c59af027 | 1915 | tvp->v_type = IFTOVT(mode); /* Rest init'd in iget() */ |
031fd966 | 1916 | ip->i_nlink = 1; |
cfef4373 JH |
1917 | if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) && |
1918 | suser(cnp->cn_cred, NULL)) | |
031fd966 KB |
1919 | ip->i_mode &= ~ISGID; |
1920 | ||
1921 | /* | |
1922 | * Make sure inode goes to disk before directory entry. | |
1923 | */ | |
c59af027 | 1924 | if (error = VOP_UPDATE(tvp, &time, &time, 1)) |
031fd966 | 1925 | goto bad; |
cfef4373 | 1926 | if (error = ufs_direnter(ip, dvp, cnp)) |
031fd966 | 1927 | goto bad; |
cfef4373 JH |
1928 | if ((cnp->cn_flags & SAVESTART) == 0) |
1929 | FREE(cnp->cn_pnbuf, M_NAMEI); | |
031fd966 | 1930 | ufs_iput(pdir); |
c59af027 | 1931 | *vpp = tvp; |
031fd966 KB |
1932 | return (0); |
1933 | ||
1934 | bad: | |
1935 | /* | |
1936 | * Write error occurred trying to update the inode | |
1937 | * or the directory so must deallocate the inode. | |
1938 | */ | |
cfef4373 | 1939 | free(cnp->cn_pnbuf, M_NAMEI); |
031fd966 KB |
1940 | ufs_iput(pdir); |
1941 | ip->i_nlink = 0; | |
1942 | ip->i_flag |= ICHG; | |
1943 | ufs_iput(ip); | |
1944 | return (error); | |
1945 | } |