Commit | Line | Data |
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da7c5cc6 | 1 | /* |
7188ac27 KM |
2 | * Copyright (c) 1982, 1986, 1989 Regents of the University of California. |
3 | * All rights reserved. | |
da7c5cc6 | 4 | * |
7188ac27 KM |
5 | * Redistribution and use in source and binary forms are permitted |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
16 | * | |
f09fe6d3 | 17 | * @(#)ffs_vnops.c 7.20 (Berkeley) %G% |
da7c5cc6 | 18 | */ |
6459ebe0 | 19 | |
94368568 JB |
20 | #include "param.h" |
21 | #include "systm.h" | |
94368568 JB |
22 | #include "user.h" |
23 | #include "kernel.h" | |
24 | #include "file.h" | |
25 | #include "stat.h" | |
94368568 JB |
26 | #include "buf.h" |
27 | #include "proc.h" | |
94368568 JB |
28 | #include "uio.h" |
29 | #include "socket.h" | |
30 | #include "socketvar.h" | |
7188ac27 | 31 | #include "conf.h" |
94368568 | 32 | #include "mount.h" |
7188ac27 KM |
33 | #include "vnode.h" |
34 | #include "../ufs/inode.h" | |
35 | #include "../ufs/fs.h" | |
36 | #include "../ufs/quota.h" | |
3e78e260 | 37 | |
4f083fd7 | 38 | /* |
7188ac27 | 39 | * Global vfs data structures for ufs |
4f083fd7 | 40 | */ |
3e78e260 | 41 | |
7188ac27 KM |
42 | int ufs_lookup(), |
43 | ufs_create(), | |
44 | ufs_mknod(), | |
45 | ufs_open(), | |
46 | ufs_close(), | |
47 | ufs_access(), | |
48 | ufs_getattr(), | |
49 | ufs_setattr(), | |
50 | ufs_read(), | |
51 | ufs_write(), | |
52 | ufs_ioctl(), | |
53 | ufs_select(), | |
54 | ufs_mmap(), | |
55 | ufs_fsync(), | |
56 | ufs_seek(), | |
57 | ufs_remove(), | |
58 | ufs_link(), | |
59 | ufs_rename(), | |
60 | ufs_mkdir(), | |
61 | ufs_rmdir(), | |
62 | ufs_symlink(), | |
63 | ufs_readdir(), | |
64 | ufs_readlink(), | |
65 | ufs_abortop(), | |
66 | ufs_inactive(), | |
e8a3816c | 67 | ufs_reclaim(), |
7188ac27 KM |
68 | ufs_lock(), |
69 | ufs_unlock(), | |
70 | ufs_bmap(), | |
71 | ufs_strategy(); | |
72 | ||
73 | struct vnodeops ufs_vnodeops = { | |
74 | ufs_lookup, | |
75 | ufs_create, | |
76 | ufs_mknod, | |
77 | ufs_open, | |
78 | ufs_close, | |
79 | ufs_access, | |
80 | ufs_getattr, | |
81 | ufs_setattr, | |
82 | ufs_read, | |
83 | ufs_write, | |
84 | ufs_ioctl, | |
85 | ufs_select, | |
86 | ufs_mmap, | |
87 | ufs_fsync, | |
88 | ufs_seek, | |
89 | ufs_remove, | |
90 | ufs_link, | |
91 | ufs_rename, | |
92 | ufs_mkdir, | |
93 | ufs_rmdir, | |
94 | ufs_symlink, | |
95 | ufs_readdir, | |
96 | ufs_readlink, | |
97 | ufs_abortop, | |
98 | ufs_inactive, | |
e8a3816c | 99 | ufs_reclaim, |
7188ac27 KM |
100 | ufs_lock, |
101 | ufs_unlock, | |
102 | ufs_bmap, | |
103 | ufs_strategy, | |
104 | }; | |
105 | ||
f09fe6d3 KM |
106 | int spec_lookup(), |
107 | spec_open(), | |
108 | spec_read(), | |
109 | spec_write(), | |
110 | spec_strategy(), | |
111 | spec_ioctl(), | |
112 | spec_select(), | |
113 | spec_close(), | |
114 | spec_badop(), | |
115 | spec_nullop(); | |
116 | ||
117 | struct vnodeops spec_inodeops = { | |
118 | spec_lookup, | |
119 | spec_badop, | |
120 | spec_badop, | |
121 | spec_open, | |
122 | spec_close, | |
123 | ufs_access, | |
124 | ufs_getattr, | |
125 | ufs_setattr, | |
126 | spec_read, | |
127 | spec_write, | |
128 | spec_ioctl, | |
129 | spec_select, | |
130 | spec_badop, | |
131 | spec_nullop, | |
132 | spec_badop, | |
133 | spec_badop, | |
134 | spec_badop, | |
135 | spec_badop, | |
136 | spec_badop, | |
137 | spec_badop, | |
138 | spec_badop, | |
139 | spec_badop, | |
140 | spec_badop, | |
141 | spec_badop, | |
142 | ufs_inactive, | |
143 | ufs_reclaim, | |
144 | ufs_lock, | |
145 | ufs_unlock, | |
146 | spec_badop, | |
147 | spec_strategy, | |
148 | }; | |
149 | ||
7188ac27 KM |
150 | enum vtype iftovt_tab[8] = { |
151 | VNON, VCHR, VDIR, VBLK, VREG, VLNK, VSOCK, VBAD, | |
152 | }; | |
153 | int vttoif_tab[8] = { | |
154 | 0, IFREG, IFDIR, IFBLK, IFCHR, IFLNK, IFSOCK, IFMT, | |
155 | }; | |
3e78e260 | 156 | |
4f083fd7 | 157 | /* |
7188ac27 | 158 | * Create a regular file |
4f083fd7 | 159 | */ |
7188ac27 KM |
160 | ufs_create(ndp, vap) |
161 | struct nameidata *ndp; | |
162 | struct vattr *vap; | |
3e78e260 | 163 | { |
7188ac27 KM |
164 | struct inode *ip; |
165 | int error; | |
3e78e260 | 166 | |
7188ac27 KM |
167 | if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip)) |
168 | return (error); | |
169 | ndp->ni_vp = ITOV(ip); | |
170 | return (0); | |
3e78e260 BJ |
171 | } |
172 | ||
4f083fd7 | 173 | /* |
7188ac27 | 174 | * Mknod vnode call |
4f083fd7 | 175 | */ |
7188ac27 KM |
176 | /* ARGSUSED */ |
177 | ufs_mknod(ndp, vap, cred) | |
178 | struct nameidata *ndp; | |
179 | struct ucred *cred; | |
180 | struct vattr *vap; | |
3e78e260 | 181 | { |
f09fe6d3 | 182 | register struct vnode *vp; |
7188ac27 KM |
183 | struct inode *ip; |
184 | int error; | |
3e78e260 | 185 | |
7188ac27 KM |
186 | if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip)) |
187 | return (error); | |
f09fe6d3 | 188 | vp = ITOV(ip); |
7188ac27 KM |
189 | if (vap->va_rdev) { |
190 | /* | |
191 | * Want to be able to use this to make badblock | |
192 | * inodes, so don't truncate the dev number. | |
193 | */ | |
f09fe6d3 | 194 | vp->v_rdev = ip->i_rdev = vap->va_rdev; |
7188ac27 KM |
195 | ip->i_flag |= IACC|IUPD|ICHG; |
196 | } | |
7188ac27 KM |
197 | /* |
198 | * Remove inode so that it will be reloaded by iget and | |
199 | * checked to see if it is an alias of an existing entry | |
200 | * in the inode cache. | |
201 | */ | |
9ed9b473 | 202 | iput(ip); |
f09fe6d3 KM |
203 | vp->v_type = VNON; |
204 | vgone(vp); | |
7188ac27 | 205 | return (0); |
3e78e260 BJ |
206 | } |
207 | ||
208 | /* | |
7188ac27 KM |
209 | * Open called. |
210 | * | |
211 | * Nothing to do. | |
3e78e260 | 212 | */ |
7188ac27 KM |
213 | /* ARGSUSED */ |
214 | ufs_open(vp, mode, cred) | |
215 | struct vnode *vp; | |
216 | int mode; | |
217 | struct ucred *cred; | |
3e78e260 | 218 | { |
3e78e260 | 219 | |
7188ac27 | 220 | return (0); |
3e78e260 BJ |
221 | } |
222 | ||
223 | /* | |
7188ac27 KM |
224 | * Close called |
225 | * | |
226 | * Update the times on the inode. | |
3e78e260 | 227 | */ |
7188ac27 KM |
228 | /* ARGSUSED */ |
229 | ufs_close(vp, fflag, cred) | |
230 | struct vnode *vp; | |
231 | int fflag; | |
232 | struct ucred *cred; | |
3e78e260 | 233 | { |
7188ac27 | 234 | register struct inode *ip = VTOI(vp); |
3e78e260 | 235 | |
7188ac27 KM |
236 | if (vp->v_count > 1 && !(ip->i_flag & ILOCKED)) |
237 | ITIMES(ip, &time, &time); | |
238 | return (0); | |
3e78e260 BJ |
239 | } |
240 | ||
7188ac27 KM |
241 | ufs_access(vp, mode, cred) |
242 | struct vnode *vp; | |
243 | int mode; | |
244 | struct ucred *cred; | |
3e78e260 | 245 | { |
3e78e260 | 246 | |
7188ac27 | 247 | return (iaccess(VTOI(vp), mode, cred)); |
3e78e260 BJ |
248 | } |
249 | ||
7188ac27 KM |
250 | /* ARGSUSED */ |
251 | ufs_getattr(vp, vap, cred) | |
252 | struct vnode *vp; | |
253 | register struct vattr *vap; | |
254 | struct ucred *cred; | |
3e78e260 | 255 | { |
7188ac27 | 256 | register struct inode *ip = VTOI(vp); |
3e78e260 | 257 | |
7188ac27 | 258 | ITIMES(ip, &time, &time); |
3e78e260 | 259 | /* |
7188ac27 | 260 | * Copy from inode table |
3e78e260 | 261 | */ |
7188ac27 KM |
262 | vap->va_fsid = ip->i_dev; |
263 | vap->va_fileid = ip->i_number; | |
264 | vap->va_mode = ip->i_mode & ~IFMT; | |
265 | vap->va_nlink = ip->i_nlink; | |
266 | vap->va_uid = ip->i_uid; | |
267 | vap->va_gid = ip->i_gid; | |
268 | vap->va_rdev = (dev_t)ip->i_rdev; | |
e8a3816c KM |
269 | vap->va_size = ip->i_din.di_qsize.val[0]; |
270 | vap->va_size1 = ip->i_din.di_qsize.val[1]; | |
7188ac27 | 271 | vap->va_atime.tv_sec = ip->i_atime; |
6ef53d70 | 272 | vap->va_atime.tv_usec = 0; |
7188ac27 | 273 | vap->va_mtime.tv_sec = ip->i_mtime; |
6ef53d70 | 274 | vap->va_mtime.tv_usec = 0; |
7188ac27 | 275 | vap->va_ctime.tv_sec = ip->i_ctime; |
6ef53d70 | 276 | vap->va_ctime.tv_usec = 0; |
d07fc92a KM |
277 | vap->va_flags = ip->i_flags; |
278 | vap->va_gen = ip->i_gen; | |
7188ac27 KM |
279 | /* this doesn't belong here */ |
280 | if (vp->v_type == VBLK) | |
281 | vap->va_blocksize = BLKDEV_IOSIZE; | |
282 | else if (vp->v_type == VCHR) | |
283 | vap->va_blocksize = MAXBSIZE; | |
8eee8525 | 284 | else |
7188ac27 | 285 | vap->va_blocksize = ip->i_fs->fs_bsize; |
a61a68d6 | 286 | vap->va_bytes = dbtob(ip->i_blocks); |
7188ac27 KM |
287 | vap->va_bytes1 = -1; |
288 | vap->va_type = vp->v_type; | |
289 | return (0); | |
3e78e260 BJ |
290 | } |
291 | ||
292 | /* | |
7188ac27 | 293 | * Set attribute vnode op. called from several syscalls |
3e78e260 | 294 | */ |
7188ac27 KM |
295 | ufs_setattr(vp, vap, cred) |
296 | register struct vnode *vp; | |
297 | register struct vattr *vap; | |
298 | register struct ucred *cred; | |
3e78e260 | 299 | { |
7188ac27 KM |
300 | register struct inode *ip = VTOI(vp); |
301 | int error = 0; | |
b4d1aee9 | 302 | |
7188ac27 KM |
303 | /* |
304 | * Check for unsetable attributes. | |
305 | */ | |
306 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || | |
307 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || | |
308 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || | |
d07fc92a | 309 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
7188ac27 | 310 | return (EINVAL); |
b4d1aee9 | 311 | } |
7188ac27 KM |
312 | /* |
313 | * Go through the fields and update iff not VNOVAL. | |
314 | */ | |
315 | if (vap->va_uid != (u_short)VNOVAL || vap->va_gid != (u_short)VNOVAL) | |
316 | if (error = chown1(vp, vap->va_uid, vap->va_gid, cred)) | |
317 | return (error); | |
318 | if (vap->va_size != VNOVAL) { | |
319 | if (vp->v_type == VDIR) | |
320 | return (EISDIR); | |
7188ac27 KM |
321 | if (error = itrunc(ip, vap->va_size)) |
322 | return (error); | |
3e78e260 | 323 | } |
7188ac27 | 324 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { |
de412887 KM |
325 | if (cred->cr_uid != ip->i_uid && |
326 | (error = suser(cred, &u.u_acflag))) | |
327 | return (error); | |
7188ac27 KM |
328 | if (vap->va_atime.tv_sec != VNOVAL) |
329 | ip->i_flag |= IACC; | |
330 | if (vap->va_mtime.tv_sec != VNOVAL) | |
331 | ip->i_flag |= IUPD; | |
332 | ip->i_flag |= ICHG; | |
333 | if (error = iupdat(ip, &vap->va_atime, &vap->va_mtime, 1)) | |
334 | return (error); | |
5485e062 | 335 | } |
7188ac27 KM |
336 | if (vap->va_mode != (u_short)VNOVAL) |
337 | error = chmod1(vp, (int)vap->va_mode, cred); | |
d07fc92a KM |
338 | if (vap->va_flags != VNOVAL) { |
339 | if (cred->cr_uid != ip->i_uid && | |
340 | (error = suser(cred, &u.u_acflag))) | |
341 | return (error); | |
342 | if (cred->cr_uid == 0) { | |
343 | ip->i_flags = vap->va_flags; | |
344 | } else { | |
345 | ip->i_flags &= 0xffff0000; | |
346 | ip->i_flags |= (vap->va_flags & 0xffff); | |
347 | } | |
348 | ip->i_flag |= ICHG; | |
349 | } | |
7188ac27 | 350 | return (error); |
528f664c SL |
351 | } |
352 | ||
4f083fd7 SL |
353 | /* |
354 | * Change the mode on a file. | |
355 | * Inode must be locked before calling. | |
356 | */ | |
7188ac27 KM |
357 | chmod1(vp, mode, cred) |
358 | register struct vnode *vp; | |
528f664c | 359 | register int mode; |
7188ac27 | 360 | struct ucred *cred; |
528f664c | 361 | { |
7188ac27 | 362 | register struct inode *ip = VTOI(vp); |
de412887 | 363 | int error; |
197da11b | 364 | |
de412887 KM |
365 | if (cred->cr_uid != ip->i_uid && |
366 | (error = suser(cred, &u.u_acflag))) | |
367 | return (error); | |
3e78e260 | 368 | ip->i_mode &= ~07777; |
7188ac27 KM |
369 | if (cred->cr_uid) { |
370 | if (vp->v_type != VDIR) | |
47af7174 | 371 | mode &= ~ISVTX; |
7188ac27 | 372 | if (!groupmember(ip->i_gid, cred)) |
bb1b75f4 | 373 | mode &= ~ISGID; |
f94ceb3b | 374 | } |
7188ac27 | 375 | ip->i_mode |= mode & 07777; |
3e78e260 | 376 | ip->i_flag |= ICHG; |
7188ac27 KM |
377 | if ((vp->v_flag & VTEXT) && (ip->i_mode & ISVTX) == 0) |
378 | xrele(vp); | |
47af7174 | 379 | return (0); |
5485e062 BJ |
380 | } |
381 | ||
528f664c SL |
382 | /* |
383 | * Perform chown operation on inode ip; | |
384 | * inode must be locked prior to call. | |
385 | */ | |
7188ac27 KM |
386 | chown1(vp, uid, gid, cred) |
387 | register struct vnode *vp; | |
388 | uid_t uid; | |
389 | gid_t gid; | |
390 | struct ucred *cred; | |
528f664c | 391 | { |
7188ac27 | 392 | register struct inode *ip = VTOI(vp); |
528f664c SL |
393 | #ifdef QUOTA |
394 | register long change; | |
bb1b75f4 | 395 | #endif |
7188ac27 | 396 | int error; |
528f664c | 397 | |
7188ac27 | 398 | if (uid == (u_short)VNOVAL) |
bb1b75f4 | 399 | uid = ip->i_uid; |
7188ac27 | 400 | if (gid == (u_short)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)) && | |
409 | (error = suser(cred, &u.u_acflag))) | |
410 | return (error); | |
bb1b75f4 | 411 | #ifdef QUOTA |
3809bf69 | 412 | if (ip->i_uid == uid) /* this just speeds things a little */ |
0a77f278 | 413 | change = 0; |
2e073567 SL |
414 | else |
415 | change = ip->i_blocks; | |
416 | (void) chkdq(ip, -change, 1); | |
417 | (void) chkiq(ip->i_dev, ip, ip->i_uid, 1); | |
0a77f278 | 418 | dqrele(ip->i_dquot); |
f94ceb3b | 419 | #endif |
b440c2b9 KM |
420 | if (ip->i_uid != uid && cred->cr_uid != 0) |
421 | ip->i_mode &= ~ISUID; | |
422 | if (ip->i_gid != gid && cred->cr_uid != 0) | |
423 | ip->i_mode &= ~ISGID; | |
bb1b75f4 SL |
424 | ip->i_uid = uid; |
425 | ip->i_gid = gid; | |
3e78e260 | 426 | ip->i_flag |= ICHG; |
528f664c | 427 | #ifdef QUOTA |
0a77f278 | 428 | ip->i_dquot = inoquota(ip); |
2e073567 | 429 | (void) chkdq(ip, change, 1); |
8011f5df | 430 | (void) chkiq(ip->i_dev, (struct inode *)NULL, (uid_t)uid, 1); |
2e073567 SL |
431 | return (u.u_error); /* should == 0 ALWAYS !! */ |
432 | #else | |
bb1b75f4 | 433 | return (0); |
2e073567 | 434 | #endif |
d67a03eb BJ |
435 | } |
436 | ||
7188ac27 KM |
437 | /* ARGSUSED */ |
438 | ufs_ioctl(vp, com, data, fflag, cred) | |
439 | struct vnode *vp; | |
440 | int com; | |
441 | caddr_t data; | |
442 | int fflag; | |
443 | struct ucred *cred; | |
bb1b75f4 | 444 | { |
bb1b75f4 | 445 | |
7188ac27 KM |
446 | printf("ufs_ioctl called with type %d\n", vp->v_type); |
447 | return (ENOTTY); | |
448 | } | |
449 | ||
450 | /* ARGSUSED */ | |
451 | ufs_select(vp, which, cred) | |
452 | struct vnode *vp; | |
453 | int which; | |
454 | struct ucred *cred; | |
455 | { | |
456 | ||
457 | printf("ufs_select called with type %d\n", vp->v_type); | |
458 | return (1); /* XXX */ | |
bb1b75f4 | 459 | } |
d67a03eb | 460 | |
4f083fd7 | 461 | /* |
7188ac27 KM |
462 | * Mmap a file |
463 | * | |
464 | * NB Currently unsupported. | |
4f083fd7 | 465 | */ |
7188ac27 KM |
466 | /* ARGSUSED */ |
467 | ufs_mmap(vp, fflags, cred) | |
468 | struct vnode *vp; | |
469 | int fflags; | |
470 | struct ucred *cred; | |
d67a03eb | 471 | { |
d67a03eb | 472 | |
7188ac27 | 473 | return (EINVAL); |
d67a03eb | 474 | } |
64d3a787 | 475 | |
4f083fd7 | 476 | /* |
7188ac27 | 477 | * Synch an open file. |
4f083fd7 | 478 | */ |
7188ac27 KM |
479 | /* ARGSUSED */ |
480 | ufs_fsync(vp, fflags, cred) | |
481 | struct vnode *vp; | |
482 | int fflags; | |
483 | struct ucred *cred; | |
528f664c | 484 | { |
7188ac27 KM |
485 | register struct inode *ip = VTOI(vp); |
486 | int error; | |
487 | ||
488 | ILOCK(ip); | |
489 | if (fflags&FWRITE) | |
490 | ip->i_flag |= ICHG; | |
491 | error = syncip(ip); | |
492 | IUNLOCK(ip); | |
493 | return (error); | |
528f664c SL |
494 | } |
495 | ||
4f083fd7 | 496 | /* |
7188ac27 KM |
497 | * Seek on a file |
498 | * | |
499 | * Nothing to do, so just return. | |
4f083fd7 | 500 | */ |
7188ac27 KM |
501 | /* ARGSUSED */ |
502 | ufs_seek(vp, oldoff, newoff, cred) | |
503 | struct vnode *vp; | |
504 | off_t oldoff, newoff; | |
505 | struct ucred *cred; | |
528f664c | 506 | { |
7188ac27 KM |
507 | |
508 | return (0); | |
509 | } | |
510 | ||
511 | /* | |
512 | * ufs remove | |
513 | * Hard to avoid races here, especially | |
514 | * in unlinking directories. | |
515 | */ | |
516 | ufs_remove(ndp) | |
517 | struct nameidata *ndp; | |
518 | { | |
519 | register struct inode *ip, *dp; | |
520 | int error; | |
521 | ||
522 | ip = VTOI(ndp->ni_vp); | |
523 | dp = VTOI(ndp->ni_dvp); | |
524 | error = dirremove(ndp); | |
525 | if (!error) { | |
526 | ip->i_nlink--; | |
527 | ip->i_flag |= ICHG; | |
528f664c | 528 | } |
7188ac27 KM |
529 | if (dp == ip) |
530 | vrele(ITOV(ip)); | |
531 | else | |
532 | iput(ip); | |
533 | iput(dp); | |
534 | return (error); | |
4f083fd7 SL |
535 | } |
536 | ||
537 | /* | |
7188ac27 | 538 | * link vnode call |
4f083fd7 | 539 | */ |
7188ac27 KM |
540 | ufs_link(vp, ndp) |
541 | register struct vnode *vp; | |
542 | register struct nameidata *ndp; | |
4f083fd7 | 543 | { |
7188ac27 KM |
544 | register struct inode *ip = VTOI(vp); |
545 | int error; | |
4f083fd7 | 546 | |
7188ac27 KM |
547 | if (ndp->ni_dvp != vp) |
548 | ILOCK(ip); | |
549 | if (ip->i_nlink == LINK_MAX - 1) { | |
550 | error = EMLINK; | |
551 | goto out; | |
552 | } | |
553 | ip->i_nlink++; | |
554 | ip->i_flag |= ICHG; | |
555 | error = iupdat(ip, &time, &time, 1); | |
556 | if (!error) | |
557 | error = direnter(ip, ndp); | |
558 | out: | |
559 | if (ndp->ni_dvp != vp) | |
560 | IUNLOCK(ip); | |
561 | if (error) { | |
562 | ip->i_nlink--; | |
82252d2b | 563 | ip->i_flag |= ICHG; |
7188ac27 KM |
564 | } |
565 | return (error); | |
528f664c SL |
566 | } |
567 | ||
4f083fd7 SL |
568 | /* |
569 | * Rename system call. | |
570 | * rename("foo", "bar"); | |
571 | * is essentially | |
572 | * unlink("bar"); | |
573 | * link("foo", "bar"); | |
574 | * unlink("foo"); | |
575 | * but ``atomically''. Can't do full commit without saving state in the | |
576 | * inode on disk which isn't feasible at this time. Best we can do is | |
577 | * always guarantee the target exists. | |
578 | * | |
579 | * Basic algorithm is: | |
580 | * | |
581 | * 1) Bump link count on source while we're linking it to the | |
7188ac27 | 582 | * target. This also ensure the inode won't be deleted out |
68f21562 KM |
583 | * from underneath us while we work (it may be truncated by |
584 | * a concurrent `trunc' or `open' for creation). | |
4f083fd7 SL |
585 | * 2) Link source to destination. If destination already exists, |
586 | * delete it first. | |
68f21562 KM |
587 | * 3) Unlink source reference to inode if still around. If a |
588 | * directory was moved and the parent of the destination | |
4f083fd7 SL |
589 | * is different from the source, patch the ".." entry in the |
590 | * directory. | |
4f083fd7 | 591 | */ |
7188ac27 KM |
592 | ufs_rename(fndp, tndp) |
593 | register struct nameidata *fndp, *tndp; | |
528f664c | 594 | { |
4f083fd7 | 595 | register struct inode *ip, *xp, *dp; |
68f21562 KM |
596 | struct dirtemplate dirbuf; |
597 | int doingdirectory = 0, oldparent = 0, newparent = 0; | |
a5390dce | 598 | int error = 0; |
4f083fd7 | 599 | |
7188ac27 KM |
600 | dp = VTOI(fndp->ni_dvp); |
601 | ip = VTOI(fndp->ni_vp); | |
602 | ILOCK(ip); | |
4f083fd7 | 603 | if ((ip->i_mode&IFMT) == IFDIR) { |
7188ac27 | 604 | register struct direct *d = &fndp->ni_dent; |
4f083fd7 | 605 | |
4f083fd7 | 606 | /* |
046f18d1 | 607 | * Avoid ".", "..", and aliases of "." for obvious reasons. |
4f083fd7 | 608 | */ |
7188ac27 KM |
609 | if ((d->d_namlen == 1 && d->d_name[0] == '.') || dp == ip || |
610 | fndp->ni_isdotdot || (ip->i_flag & IRENAME)) { | |
611 | IUNLOCK(ip); | |
612 | ufs_abortop(fndp); | |
613 | ufs_abortop(tndp); | |
614 | return (EINVAL); | |
4f083fd7 | 615 | } |
68f21562 | 616 | ip->i_flag |= IRENAME; |
4f083fd7 SL |
617 | oldparent = dp->i_number; |
618 | doingdirectory++; | |
619 | } | |
7188ac27 | 620 | vrele(fndp->ni_dvp); |
4f083fd7 SL |
621 | |
622 | /* | |
623 | * 1) Bump link count while we're moving stuff | |
624 | * around. If we crash somewhere before | |
625 | * completing our work, the link count | |
626 | * may be wrong, but correctable. | |
627 | */ | |
628 | ip->i_nlink++; | |
629 | ip->i_flag |= ICHG; | |
7188ac27 | 630 | error = iupdat(ip, &time, &time, 1); |
a388503d | 631 | IUNLOCK(ip); |
4f083fd7 SL |
632 | |
633 | /* | |
634 | * When the target exists, both the directory | |
7188ac27 | 635 | * and target vnodes are returned locked. |
4f083fd7 | 636 | */ |
7188ac27 KM |
637 | dp = VTOI(tndp->ni_dvp); |
638 | xp = NULL; | |
639 | if (tndp->ni_vp) | |
640 | xp = VTOI(tndp->ni_vp); | |
046f18d1 SL |
641 | /* |
642 | * If ".." must be changed (ie the directory gets a new | |
81552f0f KM |
643 | * parent) then the source directory must not be in the |
644 | * directory heirarchy above the target, as this would | |
645 | * orphan everything below the source directory. Also | |
646 | * the user must have write permission in the source so | |
647 | * as to be able to change "..". We must repeat the call | |
648 | * to namei, as the parent directory is unlocked by the | |
649 | * call to checkpath(). | |
046f18d1 | 650 | */ |
68f21562 KM |
651 | if (oldparent != dp->i_number) |
652 | newparent = dp->i_number; | |
653 | if (doingdirectory && newparent) { | |
7188ac27 | 654 | if (error = iaccess(ip, IWRITE, tndp->ni_cred)) |
81552f0f | 655 | goto bad; |
7188ac27 | 656 | tndp->ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE; |
81552f0f | 657 | do { |
7188ac27 | 658 | dp = VTOI(tndp->ni_dvp); |
81552f0f | 659 | if (xp != NULL) |
79cf21e2 | 660 | iput(xp); |
7188ac27 | 661 | if (error = checkpath(ip, dp, tndp->ni_cred)) |
81552f0f | 662 | goto out; |
7188ac27 | 663 | if (error = namei(tndp)) |
81552f0f | 664 | goto out; |
7188ac27 KM |
665 | xp = NULL; |
666 | if (tndp->ni_vp) | |
667 | xp = VTOI(tndp->ni_vp); | |
668 | } while (dp != VTOI(tndp->ni_dvp)); | |
81552f0f | 669 | } |
4f083fd7 SL |
670 | /* |
671 | * 2) If target doesn't exist, link the target | |
672 | * to the source and unlink the source. | |
673 | * Otherwise, rewrite the target directory | |
674 | * entry to reference the source inode and | |
675 | * expunge the original entry's existence. | |
676 | */ | |
4f083fd7 | 677 | if (xp == NULL) { |
7188ac27 KM |
678 | if (dp->i_dev != ip->i_dev) |
679 | panic("rename: EXDEV"); | |
4f083fd7 | 680 | /* |
68f21562 KM |
681 | * Account for ".." in new directory. |
682 | * When source and destination have the same | |
683 | * parent we don't fool with the link count. | |
4f083fd7 | 684 | */ |
68f21562 | 685 | if (doingdirectory && newparent) { |
4f083fd7 SL |
686 | dp->i_nlink++; |
687 | dp->i_flag |= ICHG; | |
7188ac27 | 688 | error = iupdat(dp, &time, &time, 1); |
4f083fd7 | 689 | } |
7188ac27 | 690 | if (error = direnter(ip, tndp)) |
4f083fd7 SL |
691 | goto out; |
692 | } else { | |
7188ac27 KM |
693 | if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) |
694 | panic("rename: EXDEV"); | |
e69c3c9c SL |
695 | /* |
696 | * Short circuit rename(foo, foo). | |
697 | */ | |
698 | if (xp->i_number == ip->i_number) | |
7188ac27 | 699 | panic("rename: same file"); |
80cee150 JB |
700 | /* |
701 | * If the parent directory is "sticky", then the user must | |
702 | * own the parent directory, or the destination of the rename, | |
703 | * otherwise the destination may not be changed (except by | |
704 | * root). This implements append-only directories. | |
705 | */ | |
7188ac27 KM |
706 | if ((dp->i_mode & ISVTX) && tndp->ni_cred->cr_uid != 0 && |
707 | tndp->ni_cred->cr_uid != dp->i_uid && | |
708 | xp->i_uid != tndp->ni_cred->cr_uid) { | |
80cee150 JB |
709 | error = EPERM; |
710 | goto bad; | |
711 | } | |
4f083fd7 | 712 | /* |
a5390dce SL |
713 | * Target must be empty if a directory |
714 | * and have no links to it. | |
4f083fd7 SL |
715 | * Also, insure source and target are |
716 | * compatible (both directories, or both | |
717 | * not directories). | |
718 | */ | |
719 | if ((xp->i_mode&IFMT) == IFDIR) { | |
7188ac27 KM |
720 | if (!dirempty(xp, dp->i_number, tndp->ni_cred) || |
721 | xp->i_nlink > 2) { | |
a5390dce | 722 | error = ENOTEMPTY; |
4f083fd7 SL |
723 | goto bad; |
724 | } | |
725 | if (!doingdirectory) { | |
a5390dce | 726 | error = ENOTDIR; |
4f083fd7 SL |
727 | goto bad; |
728 | } | |
7188ac27 | 729 | cache_purge(ITOV(dp)); |
4f083fd7 | 730 | } else if (doingdirectory) { |
a5390dce | 731 | error = EISDIR; |
4f083fd7 SL |
732 | goto bad; |
733 | } | |
7188ac27 KM |
734 | if (error = dirrewrite(dp, ip, tndp)) |
735 | goto bad; | |
736 | vput(ITOV(dp)); | |
4f083fd7 | 737 | /* |
a5390dce SL |
738 | * Adjust the link count of the target to |
739 | * reflect the dirrewrite above. If this is | |
740 | * a directory it is empty and there are | |
741 | * no links to it, so we can squash the inode and | |
742 | * any space associated with it. We disallowed | |
743 | * renaming over top of a directory with links to | |
68f21562 KM |
744 | * it above, as the remaining link would point to |
745 | * a directory without "." or ".." entries. | |
4f083fd7 | 746 | */ |
a5390dce | 747 | xp->i_nlink--; |
4f083fd7 | 748 | if (doingdirectory) { |
a5390dce SL |
749 | if (--xp->i_nlink != 0) |
750 | panic("rename: linked directory"); | |
7188ac27 | 751 | error = itrunc(xp, (u_long)0); |
a5390dce | 752 | } |
4f083fd7 | 753 | xp->i_flag |= ICHG; |
88d931ba | 754 | iput(xp); |
31db12cb | 755 | xp = NULL; |
4f083fd7 SL |
756 | } |
757 | ||
758 | /* | |
759 | * 3) Unlink the source. | |
760 | */ | |
7188ac27 KM |
761 | fndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; |
762 | (void)namei(fndp); | |
763 | if (fndp->ni_vp != NULL) { | |
764 | xp = VTOI(fndp->ni_vp); | |
765 | dp = VTOI(fndp->ni_dvp); | |
766 | } else { | |
79cf21e2 KM |
767 | if (fndp->ni_dvp != NULL) |
768 | vput(fndp->ni_dvp); | |
7188ac27 | 769 | xp = NULL; |
4f1a9037 | 770 | dp = NULL; |
7188ac27 | 771 | } |
4f083fd7 | 772 | /* |
7188ac27 | 773 | * Ensure that the directory entry still exists and has not |
68f21562 KM |
774 | * changed while the new name has been entered. If the source is |
775 | * a file then the entry may have been unlinked or renamed. In | |
776 | * either case there is no further work to be done. If the source | |
777 | * is a directory then it cannot have been rmdir'ed; its link | |
778 | * count of three would cause a rmdir to fail with ENOTEMPTY. | |
7188ac27 | 779 | * The IRENAME flag ensures that it cannot be moved by another |
68f21562 | 780 | * rename. |
4f083fd7 | 781 | */ |
4f1a9037 | 782 | if (xp != ip) { |
68f21562 | 783 | if (doingdirectory) |
4f1a9037 | 784 | panic("rename: lost dir entry"); |
68f21562 | 785 | } else { |
4f083fd7 | 786 | /* |
68f21562 KM |
787 | * If the source is a directory with a |
788 | * new parent, the link count of the old | |
789 | * parent directory must be decremented | |
790 | * and ".." set to point to the new parent. | |
4f083fd7 | 791 | */ |
68f21562 | 792 | if (doingdirectory && newparent) { |
4f083fd7 SL |
793 | dp->i_nlink--; |
794 | dp->i_flag |= ICHG; | |
68f21562 | 795 | error = rdwri(UIO_READ, xp, (caddr_t)&dirbuf, |
7188ac27 | 796 | sizeof (struct dirtemplate), (off_t)0, |
93e273b9 | 797 | UIO_SYSSPACE, tndp->ni_cred, (int *)0); |
68f21562 KM |
798 | if (error == 0) { |
799 | if (dirbuf.dotdot_namlen != 2 || | |
800 | dirbuf.dotdot_name[0] != '.' || | |
801 | dirbuf.dotdot_name[1] != '.') { | |
802 | printf("rename: mangled dir\n"); | |
803 | } else { | |
804 | dirbuf.dotdot_ino = newparent; | |
805 | (void) rdwri(UIO_WRITE, xp, | |
806 | (caddr_t)&dirbuf, | |
807 | sizeof (struct dirtemplate), | |
93e273b9 | 808 | (off_t)0, UIO_SYSSPACE, |
7188ac27 KM |
809 | tndp->ni_cred, (int *)0); |
810 | cache_purge(ITOV(dp)); | |
68f21562 KM |
811 | } |
812 | } | |
4f083fd7 | 813 | } |
7188ac27 KM |
814 | error = dirremove(fndp); |
815 | if (!error) { | |
68f21562 KM |
816 | xp->i_nlink--; |
817 | xp->i_flag |= ICHG; | |
4f083fd7 | 818 | } |
68f21562 | 819 | xp->i_flag &= ~IRENAME; |
4f083fd7 | 820 | } |
4f083fd7 | 821 | if (dp) |
7188ac27 | 822 | vput(ITOV(dp)); |
68f21562 | 823 | if (xp) |
7188ac27 KM |
824 | vput(ITOV(xp)); |
825 | vrele(ITOV(ip)); | |
826 | return (error); | |
a5390dce | 827 | |
4f083fd7 | 828 | bad: |
4f083fd7 | 829 | if (xp) |
7188ac27 KM |
830 | vput(ITOV(xp)); |
831 | vput(ITOV(dp)); | |
4f083fd7 SL |
832 | out: |
833 | ip->i_nlink--; | |
834 | ip->i_flag |= ICHG; | |
7188ac27 KM |
835 | vrele(ITOV(ip)); |
836 | return (error); | |
64d3a787 | 837 | } |
88a7a62a SL |
838 | |
839 | /* | |
840 | * A virgin directory (no blushing please). | |
841 | */ | |
842 | struct dirtemplate mastertemplate = { | |
843 | 0, 12, 1, ".", | |
844 | 0, DIRBLKSIZ - 12, 2, ".." | |
845 | }; | |
846 | ||
847 | /* | |
848 | * Mkdir system call | |
849 | */ | |
7188ac27 KM |
850 | ufs_mkdir(ndp, vap) |
851 | struct nameidata *ndp; | |
852 | struct vattr *vap; | |
88a7a62a | 853 | { |
88a7a62a | 854 | register struct inode *ip, *dp; |
7188ac27 KM |
855 | struct inode *tip; |
856 | struct vnode *dvp; | |
88a7a62a | 857 | struct dirtemplate dirtemplate; |
7188ac27 KM |
858 | int error; |
859 | int dmode; | |
860 | ||
861 | dvp = ndp->ni_dvp; | |
862 | dp = VTOI(dvp); | |
863 | dmode = vap->va_mode&0777; | |
864 | dmode |= IFDIR; | |
88a7a62a SL |
865 | /* |
866 | * Must simulate part of maknode here | |
867 | * in order to acquire the inode, but | |
868 | * not have it entered in the parent | |
869 | * directory. The entry is made later | |
870 | * after writing "." and ".." entries out. | |
871 | */ | |
7188ac27 KM |
872 | error = ialloc(dp, dirpref(dp->i_fs), dmode, &tip); |
873 | if (error) { | |
88a7a62a | 874 | iput(dp); |
7188ac27 | 875 | return (error); |
88a7a62a | 876 | } |
7188ac27 | 877 | ip = tip; |
88a7a62a SL |
878 | #ifdef QUOTA |
879 | if (ip->i_dquot != NODQUOT) | |
880 | panic("mkdir: dquot"); | |
881 | #endif | |
882 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
883 | ip->i_mode = dmode; |
884 | ITOV(ip)->v_type = VDIR; /* Rest init'd in iget() */ | |
88a7a62a | 885 | ip->i_nlink = 2; |
7188ac27 | 886 | ip->i_uid = ndp->ni_cred->cr_uid; |
88a7a62a SL |
887 | ip->i_gid = dp->i_gid; |
888 | #ifdef QUOTA | |
889 | ip->i_dquot = inoquota(ip); | |
890 | #endif | |
7188ac27 | 891 | error = iupdat(ip, &time, &time, 1); |
88a7a62a SL |
892 | |
893 | /* | |
894 | * Bump link count in parent directory | |
895 | * to reflect work done below. Should | |
896 | * be done before reference is created | |
897 | * so reparation is possible if we crash. | |
898 | */ | |
899 | dp->i_nlink++; | |
900 | dp->i_flag |= ICHG; | |
7188ac27 | 901 | error = iupdat(dp, &time, &time, 1); |
88a7a62a SL |
902 | |
903 | /* | |
904 | * Initialize directory with "." | |
905 | * and ".." from static template. | |
906 | */ | |
907 | dirtemplate = mastertemplate; | |
908 | dirtemplate.dot_ino = ip->i_number; | |
909 | dirtemplate.dotdot_ino = dp->i_number; | |
7188ac27 KM |
910 | error = rdwri(UIO_WRITE, ip, (caddr_t)&dirtemplate, |
911 | sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, | |
912 | ndp->ni_cred, (int *)0); | |
913 | if (error) { | |
88a7a62a SL |
914 | dp->i_nlink--; |
915 | dp->i_flag |= ICHG; | |
916 | goto bad; | |
917 | } | |
7188ac27 KM |
918 | if (DIRBLKSIZ > dp->i_fs->fs_fsize) |
919 | panic("mkdir: blksize"); /* XXX - should grow w/balloc() */ | |
23de9f20 KM |
920 | else |
921 | ip->i_size = DIRBLKSIZ; | |
88a7a62a SL |
922 | /* |
923 | * Directory all set up, now | |
924 | * install the entry for it in | |
925 | * the parent directory. | |
926 | */ | |
7188ac27 | 927 | error = direnter(ip, ndp); |
88a7a62a | 928 | dp = NULL; |
7188ac27 | 929 | if (error) { |
715baff1 | 930 | ndp->ni_nameiop = LOOKUP | NOCACHE; |
7188ac27 KM |
931 | error = namei(ndp); |
932 | if (!error) { | |
933 | dp = VTOI(ndp->ni_vp); | |
88a7a62a SL |
934 | dp->i_nlink--; |
935 | dp->i_flag |= ICHG; | |
936 | } | |
937 | } | |
938 | bad: | |
939 | /* | |
940 | * No need to do an explicit itrunc here, | |
7188ac27 | 941 | * vrele will do this for us because we set |
88a7a62a SL |
942 | * the link count to 0. |
943 | */ | |
7188ac27 | 944 | if (error) { |
88a7a62a SL |
945 | ip->i_nlink = 0; |
946 | ip->i_flag |= ICHG; | |
cbcdacd6 KM |
947 | iput(ip); |
948 | } else | |
949 | ndp->ni_vp = ITOV(ip); | |
88a7a62a SL |
950 | if (dp) |
951 | iput(dp); | |
7188ac27 | 952 | return (error); |
88a7a62a SL |
953 | } |
954 | ||
955 | /* | |
956 | * Rmdir system call. | |
957 | */ | |
7188ac27 KM |
958 | ufs_rmdir(ndp) |
959 | register struct nameidata *ndp; | |
88a7a62a | 960 | { |
88a7a62a | 961 | register struct inode *ip, *dp; |
7188ac27 KM |
962 | int error = 0; |
963 | ||
964 | ip = VTOI(ndp->ni_vp); | |
965 | dp = VTOI(ndp->ni_dvp); | |
88a7a62a SL |
966 | /* |
967 | * No rmdir "." please. | |
968 | */ | |
969 | if (dp == ip) { | |
7188ac27 | 970 | vrele(ITOV(dp)); |
88a7a62a | 971 | iput(ip); |
7188ac27 | 972 | return (EINVAL); |
88a7a62a SL |
973 | } |
974 | /* | |
975 | * Verify the directory is empty (and valid). | |
976 | * (Rmdir ".." won't be valid since | |
977 | * ".." will contain a reference to | |
978 | * the current directory and thus be | |
979 | * non-empty.) | |
980 | */ | |
7188ac27 KM |
981 | if (ip->i_nlink != 2 || !dirempty(ip, dp->i_number, ndp->ni_cred)) { |
982 | error = ENOTEMPTY; | |
88a7a62a SL |
983 | goto out; |
984 | } | |
985 | /* | |
986 | * Delete reference to directory before purging | |
987 | * inode. If we crash in between, the directory | |
988 | * will be reattached to lost+found, | |
989 | */ | |
7188ac27 | 990 | if (error = dirremove(ndp)) |
88a7a62a SL |
991 | goto out; |
992 | dp->i_nlink--; | |
993 | dp->i_flag |= ICHG; | |
7188ac27 | 994 | cache_purge(ITOV(dp)); |
88a7a62a | 995 | iput(dp); |
7188ac27 | 996 | ndp->ni_dvp = NULL; |
88a7a62a SL |
997 | /* |
998 | * Truncate inode. The only stuff left | |
999 | * in the directory is "." and "..". The | |
1000 | * "." reference is inconsequential since | |
1001 | * we're quashing it. The ".." reference | |
1002 | * has already been adjusted above. We've | |
1003 | * removed the "." reference and the reference | |
1004 | * in the parent directory, but there may be | |
1005 | * other hard links so decrement by 2 and | |
1006 | * worry about them later. | |
1007 | */ | |
1008 | ip->i_nlink -= 2; | |
7188ac27 KM |
1009 | error = itrunc(ip, (u_long)0); |
1010 | cache_purge(ITOV(ip)); | |
88a7a62a | 1011 | out: |
7188ac27 | 1012 | if (ndp->ni_dvp) |
88a7a62a SL |
1013 | iput(dp); |
1014 | iput(ip); | |
7188ac27 | 1015 | return (error); |
88a7a62a SL |
1016 | } |
1017 | ||
7188ac27 KM |
1018 | /* |
1019 | * symlink -- make a symbolic link | |
1020 | */ | |
1021 | ufs_symlink(ndp, vap, target) | |
1022 | struct nameidata *ndp; | |
1023 | struct vattr *vap; | |
1024 | char *target; | |
1025 | { | |
1026 | struct inode *ip; | |
1027 | int error; | |
1028 | ||
1029 | error = maknode(IFLNK | vap->va_mode, ndp, &ip); | |
1030 | if (error) | |
1031 | return (error); | |
1032 | error = rdwri(UIO_WRITE, ip, target, strlen(target), (off_t)0, | |
1033 | UIO_SYSSPACE, ndp->ni_cred, (int *)0); | |
1034 | iput(ip); | |
1035 | return (error); | |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * Vnode op for read and write | |
1040 | */ | |
1041 | ufs_readdir(vp, uio, offp, cred) | |
1042 | struct vnode *vp; | |
1043 | register struct uio *uio; | |
1044 | off_t *offp; | |
1045 | struct ucred *cred; | |
88a7a62a | 1046 | { |
7188ac27 KM |
1047 | register struct inode *ip = VTOI(vp); |
1048 | int count, error; | |
88a7a62a | 1049 | |
7188ac27 KM |
1050 | ILOCK(ip); |
1051 | uio->uio_offset = *offp; | |
1052 | count = uio->uio_resid; | |
1053 | count &= ~(DIRBLKSIZ - 1); | |
1054 | if (vp->v_type != VDIR || uio->uio_iovcnt != 1 || | |
1055 | (count < DIRBLKSIZ) || (uio->uio_offset & (DIRBLKSIZ -1))) { | |
1056 | IUNLOCK(ip); | |
1057 | return (EINVAL); | |
1058 | } | |
1059 | uio->uio_resid = count; | |
1060 | uio->uio_iov->iov_len = count; | |
1061 | error = readip(ip, uio, cred); | |
1062 | *offp += count - uio->uio_resid; | |
1063 | IUNLOCK(ip); | |
1064 | return (error); | |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * Return target name of a symbolic link | |
1069 | */ | |
1070 | ufs_readlink(vp, uiop, cred) | |
1071 | struct vnode *vp; | |
1072 | struct uio *uiop; | |
1073 | struct ucred *cred; | |
1074 | { | |
1075 | ||
1076 | return (readip(VTOI(vp), uiop, cred)); | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually | |
1081 | * done. Iff ni_vp/ni_dvp not null and locked, unlock. | |
1082 | */ | |
1083 | ufs_abortop(ndp) | |
1084 | register struct nameidata *ndp; | |
1085 | { | |
1086 | register struct inode *ip; | |
1087 | ||
1088 | if (ndp->ni_vp) { | |
1089 | ip = VTOI(ndp->ni_vp); | |
1090 | if (ip->i_flag & ILOCKED) | |
1091 | IUNLOCK(ip); | |
1092 | vrele(ndp->ni_vp); | |
8462a185 | 1093 | } |
7188ac27 KM |
1094 | if (ndp->ni_dvp) { |
1095 | ip = VTOI(ndp->ni_dvp); | |
1096 | if (ip->i_flag & ILOCKED) | |
1097 | IUNLOCK(ip); | |
1098 | vrele(ndp->ni_dvp); | |
88a7a62a | 1099 | } |
7188ac27 KM |
1100 | return; |
1101 | } | |
1102 | ||
1103 | ufs_lock(vp) | |
1104 | struct vnode *vp; | |
1105 | { | |
1106 | register struct inode *ip = VTOI(vp); | |
1107 | ||
1108 | ILOCK(ip); | |
1109 | return (0); | |
1110 | } | |
1111 | ||
1112 | ufs_unlock(vp) | |
1113 | struct vnode *vp; | |
1114 | { | |
1115 | register struct inode *ip = VTOI(vp); | |
1116 | ||
1117 | if (!(ip->i_flag & ILOCKED)) | |
1118 | panic("ufs_unlock NOT LOCKED"); | |
1119 | IUNLOCK(ip); | |
1120 | return (0); | |
1121 | } | |
1122 | ||
1123 | /* | |
1124 | * Get access to bmap | |
1125 | */ | |
1126 | ufs_bmap(vp, bn, vpp, bnp) | |
1127 | struct vnode *vp; | |
1128 | daddr_t bn; | |
1129 | struct vnode **vpp; | |
1130 | daddr_t *bnp; | |
1131 | { | |
1132 | struct inode *ip = VTOI(vp); | |
1133 | ||
1134 | if (vpp != NULL) | |
1135 | *vpp = ip->i_devvp; | |
1136 | if (bnp == NULL) | |
1137 | return (0); | |
1138 | return (bmap(ip, bn, bnp, (daddr_t *)0, (int *)0)); | |
88a7a62a SL |
1139 | } |
1140 | ||
1141 | /* | |
7188ac27 | 1142 | * Just call the device strategy routine |
88a7a62a | 1143 | */ |
7188ac27 KM |
1144 | ufs_strategy(bp) |
1145 | register struct buf *bp; | |
88a7a62a | 1146 | { |
7188ac27 KM |
1147 | (*bdevsw[major(bp->b_dev)].d_strategy)(bp); |
1148 | return (0); | |
1149 | } | |
88a7a62a | 1150 | |
7188ac27 KM |
1151 | /* |
1152 | * Make a new file. | |
1153 | */ | |
1154 | maknode(mode, ndp, ipp) | |
1155 | int mode; | |
1156 | register struct nameidata *ndp; | |
1157 | struct inode **ipp; | |
1158 | { | |
1159 | register struct inode *ip; | |
1160 | struct inode *tip; | |
1161 | register struct inode *pdir = VTOI(ndp->ni_dvp); | |
1162 | ino_t ipref; | |
1163 | int error; | |
1164 | ||
1165 | *ipp = 0; | |
1166 | if ((mode & IFMT) == IFDIR) | |
1167 | ipref = dirpref(pdir->i_fs); | |
1168 | else | |
1169 | ipref = pdir->i_number; | |
1170 | error = ialloc(pdir, ipref, mode, &tip); | |
1171 | if (error) { | |
1172 | iput(pdir); | |
1173 | return (error); | |
1174 | } | |
1175 | ip = tip; | |
1176 | #ifdef QUOTA | |
1177 | if (ip->i_dquot != NODQUOT) | |
1178 | panic("maknode: dquot"); | |
1179 | #endif | |
1180 | ip->i_flag |= IACC|IUPD|ICHG; | |
1181 | if ((mode & IFMT) == 0) | |
1182 | mode |= IFREG; | |
1183 | ip->i_mode = mode; | |
1184 | ITOV(ip)->v_type = IFTOVT(mode); /* Rest init'd in iget() */ | |
1185 | ip->i_nlink = 1; | |
1186 | ip->i_uid = ndp->ni_cred->cr_uid; | |
1187 | ip->i_gid = pdir->i_gid; | |
1188 | if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, ndp->ni_cred) && | |
1189 | suser(ndp->ni_cred, NULL)) | |
1190 | ip->i_mode &= ~ISGID; | |
1191 | #ifdef QUOTA | |
1192 | ip->i_dquot = inoquota(ip); | |
1193 | #endif | |
1194 | ||
1195 | /* | |
1196 | * Make sure inode goes to disk before directory entry. | |
1197 | */ | |
1198 | if ((error = iupdat(ip, &time, &time, 1)) || | |
1199 | (error = direnter(ip, ndp))) { | |
1200 | /* | |
1201 | * Write error occurred trying to update the inode | |
1202 | * or the directory so must deallocate the inode. | |
1203 | */ | |
1204 | ip->i_nlink = 0; | |
1205 | ip->i_flag |= ICHG; | |
1206 | iput(ip); | |
1207 | return (error); | |
1208 | } | |
1209 | *ipp = ip; | |
1210 | return (0); | |
88a7a62a | 1211 | } |