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 | * |
b702c21d | 5 | * %sccs.include.redist.c% |
7188ac27 | 6 | * |
394d67a8 | 7 | * @(#)ufs_vnops.c 7.56 (Berkeley) %G% |
da7c5cc6 | 8 | */ |
6459ebe0 | 9 | |
94368568 JB |
10 | #include "param.h" |
11 | #include "systm.h" | |
94368568 JB |
12 | #include "user.h" |
13 | #include "kernel.h" | |
14 | #include "file.h" | |
15 | #include "stat.h" | |
94368568 JB |
16 | #include "buf.h" |
17 | #include "proc.h" | |
94368568 JB |
18 | #include "socket.h" |
19 | #include "socketvar.h" | |
7188ac27 | 20 | #include "conf.h" |
94368568 | 21 | #include "mount.h" |
7188ac27 | 22 | #include "vnode.h" |
0f93ba7b | 23 | #include "specdev.h" |
0b0bf936 KM |
24 | #include "fcntl.h" |
25 | #include "malloc.h" | |
26 | #include "../ufs/lockf.h" | |
4b61628b | 27 | #include "../ufs/quota.h" |
7188ac27 KM |
28 | #include "../ufs/inode.h" |
29 | #include "../ufs/fs.h" | |
3e78e260 | 30 | |
4f083fd7 | 31 | /* |
7188ac27 | 32 | * Global vfs data structures for ufs |
4f083fd7 | 33 | */ |
3e78e260 | 34 | |
7188ac27 KM |
35 | int ufs_lookup(), |
36 | ufs_create(), | |
37 | ufs_mknod(), | |
38 | ufs_open(), | |
39 | ufs_close(), | |
40 | ufs_access(), | |
41 | ufs_getattr(), | |
42 | ufs_setattr(), | |
43 | ufs_read(), | |
44 | ufs_write(), | |
45 | ufs_ioctl(), | |
46 | ufs_select(), | |
47 | ufs_mmap(), | |
48 | ufs_fsync(), | |
49 | ufs_seek(), | |
50 | ufs_remove(), | |
51 | ufs_link(), | |
52 | ufs_rename(), | |
53 | ufs_mkdir(), | |
54 | ufs_rmdir(), | |
55 | ufs_symlink(), | |
56 | ufs_readdir(), | |
57 | ufs_readlink(), | |
58 | ufs_abortop(), | |
59 | ufs_inactive(), | |
e8a3816c | 60 | ufs_reclaim(), |
7188ac27 KM |
61 | ufs_lock(), |
62 | ufs_unlock(), | |
63 | ufs_bmap(), | |
e16fa59e | 64 | ufs_strategy(), |
1c3ebc10 | 65 | ufs_print(), |
0b0bf936 KM |
66 | ufs_islocked(), |
67 | ufs_advlock(); | |
7188ac27 KM |
68 | |
69 | struct vnodeops ufs_vnodeops = { | |
e16fa59e KM |
70 | ufs_lookup, /* lookup */ |
71 | ufs_create, /* create */ | |
72 | ufs_mknod, /* mknod */ | |
73 | ufs_open, /* open */ | |
74 | ufs_close, /* close */ | |
75 | ufs_access, /* access */ | |
76 | ufs_getattr, /* getattr */ | |
77 | ufs_setattr, /* setattr */ | |
78 | ufs_read, /* read */ | |
79 | ufs_write, /* write */ | |
80 | ufs_ioctl, /* ioctl */ | |
81 | ufs_select, /* select */ | |
82 | ufs_mmap, /* mmap */ | |
83 | ufs_fsync, /* fsync */ | |
84 | ufs_seek, /* seek */ | |
85 | ufs_remove, /* remove */ | |
86 | ufs_link, /* link */ | |
87 | ufs_rename, /* rename */ | |
88 | ufs_mkdir, /* mkdir */ | |
89 | ufs_rmdir, /* rmdir */ | |
90 | ufs_symlink, /* symlink */ | |
91 | ufs_readdir, /* readdir */ | |
92 | ufs_readlink, /* readlink */ | |
93 | ufs_abortop, /* abortop */ | |
94 | ufs_inactive, /* inactive */ | |
95 | ufs_reclaim, /* reclaim */ | |
96 | ufs_lock, /* lock */ | |
97 | ufs_unlock, /* unlock */ | |
98 | ufs_bmap, /* bmap */ | |
99 | ufs_strategy, /* strategy */ | |
100 | ufs_print, /* print */ | |
1c3ebc10 | 101 | ufs_islocked, /* islocked */ |
0b0bf936 | 102 | ufs_advlock, /* advlock */ |
7188ac27 KM |
103 | }; |
104 | ||
f09fe6d3 KM |
105 | int spec_lookup(), |
106 | spec_open(), | |
24a31b70 KM |
107 | ufsspec_read(), |
108 | ufsspec_write(), | |
f09fe6d3 | 109 | spec_strategy(), |
e16fa59e | 110 | spec_bmap(), |
f09fe6d3 KM |
111 | spec_ioctl(), |
112 | spec_select(), | |
24a31b70 | 113 | ufsspec_close(), |
0b0bf936 | 114 | spec_advlock(), |
f09fe6d3 | 115 | spec_badop(), |
b9fc1077 | 116 | nullop(); |
f09fe6d3 KM |
117 | |
118 | struct vnodeops spec_inodeops = { | |
86cdabf6 KM |
119 | spec_lookup, /* lookup */ |
120 | spec_badop, /* create */ | |
121 | spec_badop, /* mknod */ | |
122 | spec_open, /* open */ | |
24a31b70 | 123 | ufsspec_close, /* close */ |
86cdabf6 KM |
124 | ufs_access, /* access */ |
125 | ufs_getattr, /* getattr */ | |
126 | ufs_setattr, /* setattr */ | |
24a31b70 KM |
127 | ufsspec_read, /* read */ |
128 | ufsspec_write, /* write */ | |
86cdabf6 KM |
129 | spec_ioctl, /* ioctl */ |
130 | spec_select, /* select */ | |
131 | spec_badop, /* mmap */ | |
b9fc1077 | 132 | nullop, /* fsync */ |
86cdabf6 KM |
133 | spec_badop, /* seek */ |
134 | spec_badop, /* remove */ | |
135 | spec_badop, /* link */ | |
136 | spec_badop, /* rename */ | |
137 | spec_badop, /* mkdir */ | |
138 | spec_badop, /* rmdir */ | |
139 | spec_badop, /* symlink */ | |
140 | spec_badop, /* readdir */ | |
141 | spec_badop, /* readlink */ | |
142 | spec_badop, /* abortop */ | |
143 | ufs_inactive, /* inactive */ | |
144 | ufs_reclaim, /* reclaim */ | |
145 | ufs_lock, /* lock */ | |
146 | ufs_unlock, /* unlock */ | |
e16fa59e | 147 | spec_bmap, /* bmap */ |
86cdabf6 | 148 | spec_strategy, /* strategy */ |
e16fa59e | 149 | ufs_print, /* print */ |
1c3ebc10 | 150 | ufs_islocked, /* islocked */ |
0b0bf936 | 151 | spec_advlock, /* advlock */ |
f09fe6d3 KM |
152 | }; |
153 | ||
d1c43d7f KM |
154 | #ifdef FIFO |
155 | int fifo_lookup(), | |
156 | fifo_open(), | |
157 | ufsfifo_read(), | |
158 | ufsfifo_write(), | |
159 | fifo_bmap(), | |
160 | fifo_ioctl(), | |
161 | fifo_select(), | |
162 | ufsfifo_close(), | |
163 | fifo_print(), | |
0b0bf936 | 164 | fifo_advlock(), |
b9fc1077 | 165 | fifo_badop(); |
d1c43d7f KM |
166 | |
167 | struct vnodeops fifo_inodeops = { | |
168 | fifo_lookup, /* lookup */ | |
169 | fifo_badop, /* create */ | |
170 | fifo_badop, /* mknod */ | |
171 | fifo_open, /* open */ | |
172 | ufsfifo_close, /* close */ | |
173 | ufs_access, /* access */ | |
174 | ufs_getattr, /* getattr */ | |
175 | ufs_setattr, /* setattr */ | |
176 | ufsfifo_read, /* read */ | |
177 | ufsfifo_write, /* write */ | |
178 | fifo_ioctl, /* ioctl */ | |
179 | fifo_select, /* select */ | |
180 | fifo_badop, /* mmap */ | |
b9fc1077 | 181 | nullop, /* fsync */ |
d1c43d7f KM |
182 | fifo_badop, /* seek */ |
183 | fifo_badop, /* remove */ | |
184 | fifo_badop, /* link */ | |
185 | fifo_badop, /* rename */ | |
186 | fifo_badop, /* mkdir */ | |
187 | fifo_badop, /* rmdir */ | |
188 | fifo_badop, /* symlink */ | |
189 | fifo_badop, /* readdir */ | |
190 | fifo_badop, /* readlink */ | |
191 | fifo_badop, /* abortop */ | |
192 | ufs_inactive, /* inactive */ | |
193 | ufs_reclaim, /* reclaim */ | |
194 | ufs_lock, /* lock */ | |
195 | ufs_unlock, /* unlock */ | |
196 | fifo_bmap, /* bmap */ | |
197 | fifo_badop, /* strategy */ | |
198 | ufs_print, /* print */ | |
199 | ufs_islocked, /* islocked */ | |
0b0bf936 | 200 | fifo_advlock, /* advlock */ |
d1c43d7f KM |
201 | }; |
202 | #endif /* FIFO */ | |
203 | ||
204 | enum vtype iftovt_tab[16] = { | |
205 | VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, | |
206 | VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, | |
7188ac27 | 207 | }; |
d1c43d7f KM |
208 | int vttoif_tab[9] = { |
209 | 0, IFREG, IFDIR, IFBLK, IFCHR, IFLNK, IFSOCK, IFIFO, IFMT, | |
7188ac27 | 210 | }; |
3e78e260 | 211 | |
4f083fd7 | 212 | /* |
7188ac27 | 213 | * Create a regular file |
4f083fd7 | 214 | */ |
7188ac27 KM |
215 | ufs_create(ndp, vap) |
216 | struct nameidata *ndp; | |
217 | struct vattr *vap; | |
3e78e260 | 218 | { |
7188ac27 KM |
219 | struct inode *ip; |
220 | int error; | |
3e78e260 | 221 | |
7188ac27 KM |
222 | if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip)) |
223 | return (error); | |
224 | ndp->ni_vp = ITOV(ip); | |
225 | return (0); | |
3e78e260 BJ |
226 | } |
227 | ||
4f083fd7 | 228 | /* |
7188ac27 | 229 | * Mknod vnode call |
4f083fd7 | 230 | */ |
7188ac27 KM |
231 | /* ARGSUSED */ |
232 | ufs_mknod(ndp, vap, cred) | |
233 | struct nameidata *ndp; | |
234 | struct ucred *cred; | |
235 | struct vattr *vap; | |
3e78e260 | 236 | { |
f09fe6d3 | 237 | register struct vnode *vp; |
7188ac27 KM |
238 | struct inode *ip; |
239 | int error; | |
3e78e260 | 240 | |
7188ac27 KM |
241 | if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip)) |
242 | return (error); | |
d1c43d7f KM |
243 | ip->i_flag |= IACC|IUPD|ICHG; |
244 | if (vap->va_rdev != VNOVAL) { | |
7188ac27 KM |
245 | /* |
246 | * Want to be able to use this to make badblock | |
247 | * inodes, so don't truncate the dev number. | |
248 | */ | |
b373e060 | 249 | ip->i_rdev = vap->va_rdev; |
7188ac27 | 250 | } |
7188ac27 KM |
251 | /* |
252 | * Remove inode so that it will be reloaded by iget and | |
253 | * checked to see if it is an alias of an existing entry | |
254 | * in the inode cache. | |
255 | */ | |
d1c43d7f KM |
256 | vp = ITOV(ip); |
257 | vput(vp); | |
f09fe6d3 KM |
258 | vp->v_type = VNON; |
259 | vgone(vp); | |
7188ac27 | 260 | return (0); |
3e78e260 BJ |
261 | } |
262 | ||
263 | /* | |
7188ac27 KM |
264 | * Open called. |
265 | * | |
266 | * Nothing to do. | |
3e78e260 | 267 | */ |
7188ac27 KM |
268 | /* ARGSUSED */ |
269 | ufs_open(vp, mode, cred) | |
270 | struct vnode *vp; | |
271 | int mode; | |
272 | struct ucred *cred; | |
3e78e260 | 273 | { |
3e78e260 | 274 | |
7188ac27 | 275 | return (0); |
3e78e260 BJ |
276 | } |
277 | ||
278 | /* | |
7188ac27 KM |
279 | * Close called |
280 | * | |
281 | * Update the times on the inode. | |
3e78e260 | 282 | */ |
7188ac27 KM |
283 | /* ARGSUSED */ |
284 | ufs_close(vp, fflag, cred) | |
285 | struct vnode *vp; | |
286 | int fflag; | |
287 | struct ucred *cred; | |
3e78e260 | 288 | { |
7188ac27 | 289 | register struct inode *ip = VTOI(vp); |
3e78e260 | 290 | |
de67eefc | 291 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
7188ac27 KM |
292 | ITIMES(ip, &time, &time); |
293 | return (0); | |
3e78e260 BJ |
294 | } |
295 | ||
4b61628b KM |
296 | /* |
297 | * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. | |
298 | * The mode is shifted to select the owner/group/other fields. The | |
299 | * super user is granted all permissions. | |
300 | */ | |
7188ac27 KM |
301 | ufs_access(vp, mode, cred) |
302 | struct vnode *vp; | |
4b61628b | 303 | register int mode; |
7188ac27 | 304 | struct ucred *cred; |
3e78e260 | 305 | { |
4b61628b KM |
306 | register struct inode *ip = VTOI(vp); |
307 | register gid_t *gp; | |
308 | int i, error; | |
3e78e260 | 309 | |
4b61628b KM |
310 | #ifdef DIAGNOSTIC |
311 | if (!VOP_ISLOCKED(vp)) { | |
312 | vprint("ufs_access: not locked", vp); | |
313 | panic("ufs_access: not locked"); | |
314 | } | |
315 | #endif | |
316 | #ifdef QUOTA | |
317 | if (mode & VWRITE) { | |
318 | switch (vp->v_type) { | |
319 | case VREG: case VDIR: case VLNK: | |
320 | if (error = getinoquota(ip)) | |
321 | return (error); | |
322 | } | |
323 | } | |
324 | #endif /* QUOTA */ | |
325 | /* | |
326 | * If you're the super-user, you always get access. | |
327 | */ | |
328 | if (cred->cr_uid == 0) | |
329 | return (0); | |
330 | /* | |
331 | * Access check is based on only one of owner, group, public. | |
332 | * If not owner, then check group. If not a member of the | |
333 | * group, then check public access. | |
334 | */ | |
335 | if (cred->cr_uid != ip->i_uid) { | |
336 | mode >>= 3; | |
337 | gp = cred->cr_groups; | |
338 | for (i = 0; i < cred->cr_ngroups; i++, gp++) | |
339 | if (ip->i_gid == *gp) | |
340 | goto found; | |
341 | mode >>= 3; | |
342 | found: | |
343 | ; | |
344 | } | |
345 | if ((ip->i_mode & mode) != 0) | |
346 | return (0); | |
347 | return (EACCES); | |
3e78e260 BJ |
348 | } |
349 | ||
7188ac27 KM |
350 | /* ARGSUSED */ |
351 | ufs_getattr(vp, vap, cred) | |
352 | struct vnode *vp; | |
353 | register struct vattr *vap; | |
354 | struct ucred *cred; | |
3e78e260 | 355 | { |
7188ac27 | 356 | register struct inode *ip = VTOI(vp); |
3e78e260 | 357 | |
7188ac27 | 358 | ITIMES(ip, &time, &time); |
3e78e260 | 359 | /* |
7188ac27 | 360 | * Copy from inode table |
3e78e260 | 361 | */ |
7188ac27 KM |
362 | vap->va_fsid = ip->i_dev; |
363 | vap->va_fileid = ip->i_number; | |
364 | vap->va_mode = ip->i_mode & ~IFMT; | |
365 | vap->va_nlink = ip->i_nlink; | |
366 | vap->va_uid = ip->i_uid; | |
367 | vap->va_gid = ip->i_gid; | |
368 | vap->va_rdev = (dev_t)ip->i_rdev; | |
4b61628b KM |
369 | #ifdef tahoe |
370 | vap->va_size = ip->i_size; | |
371 | vap->va_size_rsv = 0; | |
372 | #else | |
8fae943a | 373 | vap->va_qsize = ip->i_din.di_qsize; |
4b61628b | 374 | #endif |
7188ac27 | 375 | vap->va_atime.tv_sec = ip->i_atime; |
6ef53d70 | 376 | vap->va_atime.tv_usec = 0; |
7188ac27 | 377 | vap->va_mtime.tv_sec = ip->i_mtime; |
6ef53d70 | 378 | vap->va_mtime.tv_usec = 0; |
7188ac27 | 379 | vap->va_ctime.tv_sec = ip->i_ctime; |
6ef53d70 | 380 | vap->va_ctime.tv_usec = 0; |
d07fc92a KM |
381 | vap->va_flags = ip->i_flags; |
382 | vap->va_gen = ip->i_gen; | |
7188ac27 KM |
383 | /* this doesn't belong here */ |
384 | if (vp->v_type == VBLK) | |
385 | vap->va_blocksize = BLKDEV_IOSIZE; | |
386 | else if (vp->v_type == VCHR) | |
387 | vap->va_blocksize = MAXBSIZE; | |
8eee8525 | 388 | else |
7188ac27 | 389 | vap->va_blocksize = ip->i_fs->fs_bsize; |
a61a68d6 | 390 | vap->va_bytes = dbtob(ip->i_blocks); |
8fae943a | 391 | vap->va_bytes_rsv = 0; |
7188ac27 KM |
392 | vap->va_type = vp->v_type; |
393 | return (0); | |
3e78e260 BJ |
394 | } |
395 | ||
396 | /* | |
7188ac27 | 397 | * Set attribute vnode op. called from several syscalls |
3e78e260 | 398 | */ |
7188ac27 KM |
399 | ufs_setattr(vp, vap, cred) |
400 | register struct vnode *vp; | |
401 | register struct vattr *vap; | |
402 | register struct ucred *cred; | |
3e78e260 | 403 | { |
7188ac27 KM |
404 | register struct inode *ip = VTOI(vp); |
405 | int error = 0; | |
b4d1aee9 | 406 | |
7188ac27 KM |
407 | /* |
408 | * Check for unsetable attributes. | |
409 | */ | |
410 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || | |
411 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || | |
412 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || | |
d07fc92a | 413 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
7188ac27 | 414 | return (EINVAL); |
b4d1aee9 | 415 | } |
7188ac27 KM |
416 | /* |
417 | * Go through the fields and update iff not VNOVAL. | |
418 | */ | |
419 | if (vap->va_uid != (u_short)VNOVAL || vap->va_gid != (u_short)VNOVAL) | |
420 | if (error = chown1(vp, vap->va_uid, vap->va_gid, cred)) | |
421 | return (error); | |
422 | if (vap->va_size != VNOVAL) { | |
423 | if (vp->v_type == VDIR) | |
424 | return (EISDIR); | |
e16fa59e | 425 | if (error = itrunc(ip, vap->va_size, 0)) /* XXX IO_SYNC? */ |
7188ac27 | 426 | return (error); |
3e78e260 | 427 | } |
7188ac27 | 428 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { |
de412887 KM |
429 | if (cred->cr_uid != ip->i_uid && |
430 | (error = suser(cred, &u.u_acflag))) | |
431 | return (error); | |
7188ac27 KM |
432 | if (vap->va_atime.tv_sec != VNOVAL) |
433 | ip->i_flag |= IACC; | |
434 | if (vap->va_mtime.tv_sec != VNOVAL) | |
435 | ip->i_flag |= IUPD; | |
436 | ip->i_flag |= ICHG; | |
437 | if (error = iupdat(ip, &vap->va_atime, &vap->va_mtime, 1)) | |
438 | return (error); | |
5485e062 | 439 | } |
7188ac27 KM |
440 | if (vap->va_mode != (u_short)VNOVAL) |
441 | error = chmod1(vp, (int)vap->va_mode, cred); | |
d07fc92a KM |
442 | if (vap->va_flags != VNOVAL) { |
443 | if (cred->cr_uid != ip->i_uid && | |
444 | (error = suser(cred, &u.u_acflag))) | |
445 | return (error); | |
446 | if (cred->cr_uid == 0) { | |
447 | ip->i_flags = vap->va_flags; | |
448 | } else { | |
449 | ip->i_flags &= 0xffff0000; | |
450 | ip->i_flags |= (vap->va_flags & 0xffff); | |
451 | } | |
452 | ip->i_flag |= ICHG; | |
453 | } | |
7188ac27 | 454 | return (error); |
528f664c SL |
455 | } |
456 | ||
4f083fd7 SL |
457 | /* |
458 | * Change the mode on a file. | |
459 | * Inode must be locked before calling. | |
460 | */ | |
7188ac27 KM |
461 | chmod1(vp, mode, cred) |
462 | register struct vnode *vp; | |
528f664c | 463 | register int mode; |
7188ac27 | 464 | struct ucred *cred; |
528f664c | 465 | { |
7188ac27 | 466 | register struct inode *ip = VTOI(vp); |
de412887 | 467 | int error; |
197da11b | 468 | |
de412887 KM |
469 | if (cred->cr_uid != ip->i_uid && |
470 | (error = suser(cred, &u.u_acflag))) | |
471 | return (error); | |
7188ac27 | 472 | if (cred->cr_uid) { |
e57b6138 | 473 | if (vp->v_type != VDIR && (mode & ISVTX)) |
39b5be4c | 474 | return (EFTYPE); |
e57b6138 | 475 | if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) |
39b5be4c | 476 | return (EPERM); |
f94ceb3b | 477 | } |
39b5be4c | 478 | ip->i_mode &= ~07777; |
7188ac27 | 479 | ip->i_mode |= mode & 07777; |
3e78e260 | 480 | ip->i_flag |= ICHG; |
7188ac27 | 481 | if ((vp->v_flag & VTEXT) && (ip->i_mode & ISVTX) == 0) |
8986c97c | 482 | (void) vnode_pager_uncache(vp); |
47af7174 | 483 | return (0); |
5485e062 BJ |
484 | } |
485 | ||
528f664c SL |
486 | /* |
487 | * Perform chown operation on inode ip; | |
488 | * inode must be locked prior to call. | |
489 | */ | |
7188ac27 KM |
490 | chown1(vp, uid, gid, cred) |
491 | register struct vnode *vp; | |
492 | uid_t uid; | |
493 | gid_t gid; | |
494 | struct ucred *cred; | |
528f664c | 495 | { |
7188ac27 | 496 | register struct inode *ip = VTOI(vp); |
4b61628b KM |
497 | uid_t ouid; |
498 | gid_t ogid; | |
499 | int error = 0; | |
528f664c | 500 | #ifdef QUOTA |
4b61628b KM |
501 | register int i; |
502 | long change; | |
bb1b75f4 | 503 | #endif |
528f664c | 504 | |
7188ac27 | 505 | if (uid == (u_short)VNOVAL) |
bb1b75f4 | 506 | uid = ip->i_uid; |
7188ac27 | 507 | if (gid == (u_short)VNOVAL) |
bb1b75f4 | 508 | gid = ip->i_gid; |
18b0bce6 KB |
509 | /* |
510 | * If we don't own the file, are trying to change the owner | |
511 | * of the file, or are not a member of the target group, | |
512 | * the caller must be superuser or the call fails. | |
513 | */ | |
7188ac27 KM |
514 | if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid || |
515 | !groupmember((gid_t)gid, cred)) && | |
516 | (error = suser(cred, &u.u_acflag))) | |
517 | return (error); | |
4b61628b KM |
518 | ouid = ip->i_uid; |
519 | ogid = ip->i_gid; | |
bb1b75f4 | 520 | #ifdef QUOTA |
4b61628b KM |
521 | if (error = getinoquota(ip)) |
522 | return (error); | |
523 | if (ouid == uid) { | |
524 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
525 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
526 | } | |
527 | if (ogid == gid) { | |
528 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
529 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
530 | } | |
531 | change = ip->i_blocks; | |
532 | (void) chkdq(ip, -change, cred, CHOWN); | |
533 | (void) chkiq(ip, -1, cred, CHOWN); | |
534 | for (i = 0; i < MAXQUOTAS; i++) { | |
535 | dqrele(vp, ip->i_dquot[i]); | |
536 | ip->i_dquot[i] = NODQUOT; | |
537 | } | |
f94ceb3b | 538 | #endif |
bb1b75f4 SL |
539 | ip->i_uid = uid; |
540 | ip->i_gid = gid; | |
528f664c | 541 | #ifdef QUOTA |
4b61628b KM |
542 | if ((error = getinoquota(ip)) == 0) { |
543 | if (ouid == uid) { | |
544 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
545 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
546 | } | |
547 | if (ogid == gid) { | |
548 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
549 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
550 | } | |
551 | if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { | |
552 | if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) | |
722a9b31 | 553 | goto good; |
4b61628b KM |
554 | else |
555 | (void) chkdq(ip, -change, cred, CHOWN|FORCE); | |
556 | } | |
557 | for (i = 0; i < MAXQUOTAS; i++) { | |
558 | dqrele(vp, ip->i_dquot[i]); | |
559 | ip->i_dquot[i] = NODQUOT; | |
560 | } | |
561 | } | |
562 | ip->i_uid = ouid; | |
563 | ip->i_gid = ogid; | |
564 | if (getinoquota(ip) == 0) { | |
565 | if (ouid == uid) { | |
566 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
567 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
568 | } | |
569 | if (ogid == gid) { | |
570 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
571 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
572 | } | |
722a9b31 KM |
573 | (void) chkdq(ip, change, cred, FORCE|CHOWN); |
574 | (void) chkiq(ip, 1, cred, FORCE|CHOWN); | |
6cb69bbe | 575 | (void) getinoquota(ip); |
4b61628b | 576 | } |
6cb69bbe | 577 | return (error); |
722a9b31 | 578 | good: |
6cb69bbe KM |
579 | if (getinoquota(ip)) |
580 | panic("chown: lost quota"); | |
581 | #endif /* QUOTA */ | |
4b61628b KM |
582 | if (ouid != uid || ogid != gid) |
583 | ip->i_flag |= ICHG; | |
584 | if (ouid != uid && cred->cr_uid != 0) | |
585 | ip->i_mode &= ~ISUID; | |
586 | if (ogid != gid && cred->cr_uid != 0) | |
587 | ip->i_mode &= ~ISGID; | |
588 | return (0); | |
d67a03eb BJ |
589 | } |
590 | ||
b373e060 KM |
591 | /* |
592 | * Vnode op for reading. | |
593 | */ | |
594 | /* ARGSUSED */ | |
595 | ufs_read(vp, uio, ioflag, cred) | |
596 | struct vnode *vp; | |
597 | register struct uio *uio; | |
598 | int ioflag; | |
599 | struct ucred *cred; | |
600 | { | |
601 | register struct inode *ip = VTOI(vp); | |
602 | register struct fs *fs; | |
603 | struct buf *bp; | |
604 | daddr_t lbn, bn, rablock; | |
20aa076b | 605 | int size, diff, error = 0; |
b373e060 KM |
606 | long n, on, type; |
607 | ||
608 | if (uio->uio_rw != UIO_READ) | |
609 | panic("ufs_read mode"); | |
610 | type = ip->i_mode & IFMT; | |
611 | if (type != IFDIR && type != IFREG && type != IFLNK) | |
612 | panic("ufs_read type"); | |
613 | if (uio->uio_resid == 0) | |
614 | return (0); | |
615 | if (uio->uio_offset < 0) | |
616 | return (EINVAL); | |
617 | ip->i_flag |= IACC; | |
618 | fs = ip->i_fs; | |
619 | do { | |
620 | lbn = lblkno(fs, uio->uio_offset); | |
621 | on = blkoff(fs, uio->uio_offset); | |
622 | n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid); | |
623 | diff = ip->i_size - uio->uio_offset; | |
624 | if (diff <= 0) | |
625 | return (0); | |
626 | if (diff < n) | |
627 | n = diff; | |
b373e060 | 628 | size = blksize(fs, ip, lbn); |
e16fa59e | 629 | rablock = lbn + 1; |
20aa076b KM |
630 | if (vp->v_lastr + 1 == lbn && |
631 | lblktosize(fs, rablock) < ip->i_size) | |
632 | error = breada(ITOV(ip), lbn, size, rablock, | |
633 | blksize(fs, ip, rablock), NOCRED, &bp); | |
b373e060 | 634 | else |
e16fa59e | 635 | error = bread(ITOV(ip), lbn, size, NOCRED, &bp); |
de67eefc | 636 | vp->v_lastr = lbn; |
b373e060 KM |
637 | n = MIN(n, size - bp->b_resid); |
638 | if (error) { | |
639 | brelse(bp); | |
640 | return (error); | |
641 | } | |
642 | error = uiomove(bp->b_un.b_addr + on, (int)n, uio); | |
643 | if (n + on == fs->fs_bsize || uio->uio_offset == ip->i_size) | |
644 | bp->b_flags |= B_AGE; | |
645 | brelse(bp); | |
646 | } while (error == 0 && uio->uio_resid > 0 && n != 0); | |
647 | return (error); | |
648 | } | |
649 | ||
650 | /* | |
651 | * Vnode op for writing. | |
652 | */ | |
653 | ufs_write(vp, uio, ioflag, cred) | |
654 | register struct vnode *vp; | |
655 | struct uio *uio; | |
656 | int ioflag; | |
657 | struct ucred *cred; | |
658 | { | |
659 | register struct inode *ip = VTOI(vp); | |
660 | register struct fs *fs; | |
661 | struct buf *bp; | |
662 | daddr_t lbn, bn; | |
663 | u_long osize; | |
8986c97c KM |
664 | int n, on, flags; |
665 | int size, resid, error = 0; | |
b373e060 KM |
666 | |
667 | if (uio->uio_rw != UIO_WRITE) | |
668 | panic("ufs_write mode"); | |
669 | switch (vp->v_type) { | |
670 | case VREG: | |
671 | if (ioflag & IO_APPEND) | |
672 | uio->uio_offset = ip->i_size; | |
673 | /* fall through */ | |
674 | case VLNK: | |
675 | break; | |
676 | ||
677 | case VDIR: | |
678 | if ((ioflag & IO_SYNC) == 0) | |
679 | panic("ufs_write nonsync dir write"); | |
680 | break; | |
681 | ||
682 | default: | |
683 | panic("ufs_write type"); | |
684 | } | |
685 | if (uio->uio_offset < 0) | |
686 | return (EINVAL); | |
687 | if (uio->uio_resid == 0) | |
688 | return (0); | |
689 | /* | |
690 | * Maybe this should be above the vnode op call, but so long as | |
691 | * file servers have no limits, i don't think it matters | |
692 | */ | |
693 | if (vp->v_type == VREG && | |
694 | uio->uio_offset + uio->uio_resid > | |
695 | u.u_rlimit[RLIMIT_FSIZE].rlim_cur) { | |
696 | psignal(u.u_procp, SIGXFSZ); | |
697 | return (EFBIG); | |
698 | } | |
699 | resid = uio->uio_resid; | |
700 | osize = ip->i_size; | |
701 | fs = ip->i_fs; | |
e16fa59e KM |
702 | flags = 0; |
703 | if (ioflag & IO_SYNC) | |
704 | flags = B_SYNC; | |
b373e060 KM |
705 | do { |
706 | lbn = lblkno(fs, uio->uio_offset); | |
707 | on = blkoff(fs, uio->uio_offset); | |
708 | n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid); | |
709 | if (n < fs->fs_bsize) | |
e16fa59e | 710 | flags |= B_CLRBUF; |
b373e060 | 711 | else |
e16fa59e KM |
712 | flags &= ~B_CLRBUF; |
713 | if (error = balloc(ip, lbn, (int)(on + n), &bp, flags)) | |
b373e060 | 714 | break; |
e16fa59e | 715 | bn = bp->b_blkno; |
8986c97c | 716 | if (uio->uio_offset + n > ip->i_size) { |
b373e060 | 717 | ip->i_size = uio->uio_offset + n; |
8986c97c KM |
718 | vnode_pager_setsize(vp, ip->i_size); |
719 | } | |
b373e060 | 720 | size = blksize(fs, ip, lbn); |
8986c97c | 721 | (void) vnode_pager_uncache(vp); |
b373e060 | 722 | n = MIN(n, size - bp->b_resid); |
b373e060 KM |
723 | error = uiomove(bp->b_un.b_addr + on, n, uio); |
724 | if (ioflag & IO_SYNC) | |
725 | (void) bwrite(bp); | |
726 | else if (n + on == fs->fs_bsize) { | |
727 | bp->b_flags |= B_AGE; | |
728 | bawrite(bp); | |
729 | } else | |
730 | bdwrite(bp); | |
731 | ip->i_flag |= IUPD|ICHG; | |
732 | if (cred->cr_uid != 0) | |
733 | ip->i_mode &= ~(ISUID|ISGID); | |
734 | } while (error == 0 && uio->uio_resid > 0 && n != 0); | |
735 | if (error && (ioflag & IO_UNIT)) { | |
e16fa59e | 736 | (void) itrunc(ip, osize, ioflag & IO_SYNC); |
b373e060 KM |
737 | uio->uio_offset -= resid - uio->uio_resid; |
738 | uio->uio_resid = resid; | |
739 | } | |
1c05ecaf KM |
740 | if (!error && (ioflag & IO_SYNC)) |
741 | error = iupdat(ip, &time, &time, 1); | |
b373e060 KM |
742 | return (error); |
743 | } | |
744 | ||
7188ac27 KM |
745 | /* ARGSUSED */ |
746 | ufs_ioctl(vp, com, data, fflag, cred) | |
747 | struct vnode *vp; | |
748 | int com; | |
749 | caddr_t data; | |
750 | int fflag; | |
751 | struct ucred *cred; | |
bb1b75f4 | 752 | { |
bb1b75f4 | 753 | |
7188ac27 KM |
754 | return (ENOTTY); |
755 | } | |
756 | ||
757 | /* ARGSUSED */ | |
d1c43d7f | 758 | ufs_select(vp, which, fflags, cred) |
7188ac27 | 759 | struct vnode *vp; |
d1c43d7f | 760 | int which, fflags; |
7188ac27 KM |
761 | struct ucred *cred; |
762 | { | |
763 | ||
7188ac27 | 764 | return (1); /* XXX */ |
bb1b75f4 | 765 | } |
d67a03eb | 766 | |
4f083fd7 | 767 | /* |
7188ac27 KM |
768 | * Mmap a file |
769 | * | |
770 | * NB Currently unsupported. | |
4f083fd7 | 771 | */ |
7188ac27 KM |
772 | /* ARGSUSED */ |
773 | ufs_mmap(vp, fflags, cred) | |
774 | struct vnode *vp; | |
775 | int fflags; | |
776 | struct ucred *cred; | |
d67a03eb | 777 | { |
d67a03eb | 778 | |
7188ac27 | 779 | return (EINVAL); |
d67a03eb | 780 | } |
64d3a787 | 781 | |
4f083fd7 | 782 | /* |
7188ac27 | 783 | * Synch an open file. |
4f083fd7 | 784 | */ |
7188ac27 | 785 | /* ARGSUSED */ |
86cdabf6 | 786 | ufs_fsync(vp, fflags, cred, waitfor) |
7188ac27 KM |
787 | struct vnode *vp; |
788 | int fflags; | |
789 | struct ucred *cred; | |
86cdabf6 | 790 | int waitfor; |
528f664c | 791 | { |
86cdabf6 | 792 | struct inode *ip = VTOI(vp); |
7188ac27 | 793 | |
7188ac27 KM |
794 | if (fflags&FWRITE) |
795 | ip->i_flag |= ICHG; | |
e16fa59e KM |
796 | vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); |
797 | return (iupdat(ip, &time, &time, waitfor == MNT_WAIT)); | |
528f664c SL |
798 | } |
799 | ||
4f083fd7 | 800 | /* |
7188ac27 KM |
801 | * Seek on a file |
802 | * | |
803 | * Nothing to do, so just return. | |
4f083fd7 | 804 | */ |
7188ac27 KM |
805 | /* ARGSUSED */ |
806 | ufs_seek(vp, oldoff, newoff, cred) | |
807 | struct vnode *vp; | |
808 | off_t oldoff, newoff; | |
809 | struct ucred *cred; | |
528f664c | 810 | { |
7188ac27 KM |
811 | |
812 | return (0); | |
813 | } | |
814 | ||
815 | /* | |
816 | * ufs remove | |
817 | * Hard to avoid races here, especially | |
818 | * in unlinking directories. | |
819 | */ | |
820 | ufs_remove(ndp) | |
821 | struct nameidata *ndp; | |
822 | { | |
823 | register struct inode *ip, *dp; | |
824 | int error; | |
825 | ||
826 | ip = VTOI(ndp->ni_vp); | |
827 | dp = VTOI(ndp->ni_dvp); | |
828 | error = dirremove(ndp); | |
829 | if (!error) { | |
830 | ip->i_nlink--; | |
831 | ip->i_flag |= ICHG; | |
528f664c | 832 | } |
7188ac27 KM |
833 | if (dp == ip) |
834 | vrele(ITOV(ip)); | |
835 | else | |
836 | iput(ip); | |
837 | iput(dp); | |
838 | return (error); | |
4f083fd7 SL |
839 | } |
840 | ||
841 | /* | |
7188ac27 | 842 | * link vnode call |
4f083fd7 | 843 | */ |
7188ac27 KM |
844 | ufs_link(vp, ndp) |
845 | register struct vnode *vp; | |
846 | register struct nameidata *ndp; | |
4f083fd7 | 847 | { |
7188ac27 KM |
848 | register struct inode *ip = VTOI(vp); |
849 | int error; | |
4f083fd7 | 850 | |
986aedaa KM |
851 | if ((unsigned short)ip->i_nlink >= LINK_MAX) |
852 | return (EMLINK); | |
7188ac27 KM |
853 | if (ndp->ni_dvp != vp) |
854 | ILOCK(ip); | |
7188ac27 KM |
855 | ip->i_nlink++; |
856 | ip->i_flag |= ICHG; | |
857 | error = iupdat(ip, &time, &time, 1); | |
858 | if (!error) | |
859 | error = direnter(ip, ndp); | |
7188ac27 KM |
860 | if (ndp->ni_dvp != vp) |
861 | IUNLOCK(ip); | |
394d67a8 | 862 | vput(ndp->ni_dvp); |
7188ac27 KM |
863 | if (error) { |
864 | ip->i_nlink--; | |
82252d2b | 865 | ip->i_flag |= ICHG; |
7188ac27 KM |
866 | } |
867 | return (error); | |
528f664c SL |
868 | } |
869 | ||
4f083fd7 SL |
870 | /* |
871 | * Rename system call. | |
872 | * rename("foo", "bar"); | |
873 | * is essentially | |
874 | * unlink("bar"); | |
875 | * link("foo", "bar"); | |
876 | * unlink("foo"); | |
877 | * but ``atomically''. Can't do full commit without saving state in the | |
878 | * inode on disk which isn't feasible at this time. Best we can do is | |
879 | * always guarantee the target exists. | |
880 | * | |
881 | * Basic algorithm is: | |
882 | * | |
883 | * 1) Bump link count on source while we're linking it to the | |
7188ac27 | 884 | * target. This also ensure the inode won't be deleted out |
68f21562 KM |
885 | * from underneath us while we work (it may be truncated by |
886 | * a concurrent `trunc' or `open' for creation). | |
4f083fd7 SL |
887 | * 2) Link source to destination. If destination already exists, |
888 | * delete it first. | |
68f21562 KM |
889 | * 3) Unlink source reference to inode if still around. If a |
890 | * directory was moved and the parent of the destination | |
4f083fd7 SL |
891 | * is different from the source, patch the ".." entry in the |
892 | * directory. | |
4f083fd7 | 893 | */ |
7188ac27 KM |
894 | ufs_rename(fndp, tndp) |
895 | register struct nameidata *fndp, *tndp; | |
528f664c | 896 | { |
4f083fd7 | 897 | register struct inode *ip, *xp, *dp; |
68f21562 KM |
898 | struct dirtemplate dirbuf; |
899 | int doingdirectory = 0, oldparent = 0, newparent = 0; | |
a5390dce | 900 | int error = 0; |
4f083fd7 | 901 | |
7188ac27 KM |
902 | dp = VTOI(fndp->ni_dvp); |
903 | ip = VTOI(fndp->ni_vp); | |
904 | ILOCK(ip); | |
4f083fd7 | 905 | if ((ip->i_mode&IFMT) == IFDIR) { |
7188ac27 | 906 | register struct direct *d = &fndp->ni_dent; |
4f083fd7 | 907 | |
4f083fd7 | 908 | /* |
046f18d1 | 909 | * Avoid ".", "..", and aliases of "." for obvious reasons. |
4f083fd7 | 910 | */ |
7188ac27 KM |
911 | if ((d->d_namlen == 1 && d->d_name[0] == '.') || dp == ip || |
912 | fndp->ni_isdotdot || (ip->i_flag & IRENAME)) { | |
66955caf KM |
913 | VOP_ABORTOP(tndp); |
914 | vput(tndp->ni_dvp); | |
915 | if (tndp->ni_vp) | |
916 | vput(tndp->ni_vp); | |
917 | VOP_ABORTOP(fndp); | |
918 | vrele(fndp->ni_dvp); | |
919 | vput(fndp->ni_vp); | |
7188ac27 | 920 | return (EINVAL); |
4f083fd7 | 921 | } |
68f21562 | 922 | ip->i_flag |= IRENAME; |
4f083fd7 SL |
923 | oldparent = dp->i_number; |
924 | doingdirectory++; | |
925 | } | |
7188ac27 | 926 | vrele(fndp->ni_dvp); |
4f083fd7 SL |
927 | |
928 | /* | |
929 | * 1) Bump link count while we're moving stuff | |
930 | * around. If we crash somewhere before | |
931 | * completing our work, the link count | |
932 | * may be wrong, but correctable. | |
933 | */ | |
934 | ip->i_nlink++; | |
935 | ip->i_flag |= ICHG; | |
7188ac27 | 936 | error = iupdat(ip, &time, &time, 1); |
a388503d | 937 | IUNLOCK(ip); |
4f083fd7 SL |
938 | |
939 | /* | |
940 | * When the target exists, both the directory | |
7188ac27 | 941 | * and target vnodes are returned locked. |
4f083fd7 | 942 | */ |
7188ac27 KM |
943 | dp = VTOI(tndp->ni_dvp); |
944 | xp = NULL; | |
945 | if (tndp->ni_vp) | |
946 | xp = VTOI(tndp->ni_vp); | |
046f18d1 SL |
947 | /* |
948 | * If ".." must be changed (ie the directory gets a new | |
81552f0f KM |
949 | * parent) then the source directory must not be in the |
950 | * directory heirarchy above the target, as this would | |
951 | * orphan everything below the source directory. Also | |
952 | * the user must have write permission in the source so | |
953 | * as to be able to change "..". We must repeat the call | |
954 | * to namei, as the parent directory is unlocked by the | |
955 | * call to checkpath(). | |
046f18d1 | 956 | */ |
68f21562 KM |
957 | if (oldparent != dp->i_number) |
958 | newparent = dp->i_number; | |
959 | if (doingdirectory && newparent) { | |
48c3b6e8 KM |
960 | VOP_LOCK(fndp->ni_vp); |
961 | error = ufs_access(fndp->ni_vp, VWRITE, tndp->ni_cred); | |
962 | VOP_UNLOCK(fndp->ni_vp); | |
963 | if (error) | |
81552f0f | 964 | goto bad; |
10bae9ee KM |
965 | tndp->ni_nameiop &= ~(MODMASK | OPMASK); |
966 | tndp->ni_nameiop |= RENAME | LOCKPARENT | LOCKLEAF | NOCACHE; | |
81552f0f | 967 | do { |
7188ac27 | 968 | dp = VTOI(tndp->ni_dvp); |
81552f0f | 969 | if (xp != NULL) |
79cf21e2 | 970 | iput(xp); |
7188ac27 | 971 | if (error = checkpath(ip, dp, tndp->ni_cred)) |
81552f0f | 972 | goto out; |
7188ac27 | 973 | if (error = namei(tndp)) |
81552f0f | 974 | goto out; |
7188ac27 KM |
975 | xp = NULL; |
976 | if (tndp->ni_vp) | |
977 | xp = VTOI(tndp->ni_vp); | |
978 | } while (dp != VTOI(tndp->ni_dvp)); | |
81552f0f | 979 | } |
4f083fd7 SL |
980 | /* |
981 | * 2) If target doesn't exist, link the target | |
982 | * to the source and unlink the source. | |
983 | * Otherwise, rewrite the target directory | |
984 | * entry to reference the source inode and | |
985 | * expunge the original entry's existence. | |
986 | */ | |
4f083fd7 | 987 | if (xp == NULL) { |
7188ac27 KM |
988 | if (dp->i_dev != ip->i_dev) |
989 | panic("rename: EXDEV"); | |
4f083fd7 | 990 | /* |
68f21562 KM |
991 | * Account for ".." in new directory. |
992 | * When source and destination have the same | |
993 | * parent we don't fool with the link count. | |
4f083fd7 | 994 | */ |
68f21562 | 995 | if (doingdirectory && newparent) { |
986aedaa KM |
996 | if ((unsigned short)dp->i_nlink >= LINK_MAX) { |
997 | error = EMLINK; | |
998 | goto bad; | |
999 | } | |
4f083fd7 SL |
1000 | dp->i_nlink++; |
1001 | dp->i_flag |= ICHG; | |
986aedaa KM |
1002 | if (error = iupdat(dp, &time, &time, 1)) |
1003 | goto bad; | |
4f083fd7 | 1004 | } |
394d67a8 KM |
1005 | if (error = direnter(ip, tndp)) { |
1006 | if (doingdirectory && newparent) { | |
1007 | dp->i_nlink--; | |
1008 | dp->i_flag |= ICHG; | |
1009 | (void) iupdat(dp, &time, &time, 1); | |
1010 | } | |
1011 | goto bad; | |
1012 | } | |
4f083fd7 | 1013 | } else { |
7188ac27 KM |
1014 | if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) |
1015 | panic("rename: EXDEV"); | |
e69c3c9c SL |
1016 | /* |
1017 | * Short circuit rename(foo, foo). | |
1018 | */ | |
1019 | if (xp->i_number == ip->i_number) | |
7188ac27 | 1020 | panic("rename: same file"); |
80cee150 JB |
1021 | /* |
1022 | * If the parent directory is "sticky", then the user must | |
1023 | * own the parent directory, or the destination of the rename, | |
1024 | * otherwise the destination may not be changed (except by | |
1025 | * root). This implements append-only directories. | |
1026 | */ | |
7188ac27 KM |
1027 | if ((dp->i_mode & ISVTX) && tndp->ni_cred->cr_uid != 0 && |
1028 | tndp->ni_cred->cr_uid != dp->i_uid && | |
1029 | xp->i_uid != tndp->ni_cred->cr_uid) { | |
80cee150 JB |
1030 | error = EPERM; |
1031 | goto bad; | |
1032 | } | |
4f083fd7 | 1033 | /* |
a5390dce SL |
1034 | * Target must be empty if a directory |
1035 | * and have no links to it. | |
4f083fd7 SL |
1036 | * Also, insure source and target are |
1037 | * compatible (both directories, or both | |
1038 | * not directories). | |
1039 | */ | |
1040 | if ((xp->i_mode&IFMT) == IFDIR) { | |
7188ac27 KM |
1041 | if (!dirempty(xp, dp->i_number, tndp->ni_cred) || |
1042 | xp->i_nlink > 2) { | |
a5390dce | 1043 | error = ENOTEMPTY; |
4f083fd7 SL |
1044 | goto bad; |
1045 | } | |
1046 | if (!doingdirectory) { | |
a5390dce | 1047 | error = ENOTDIR; |
4f083fd7 SL |
1048 | goto bad; |
1049 | } | |
7188ac27 | 1050 | cache_purge(ITOV(dp)); |
4f083fd7 | 1051 | } else if (doingdirectory) { |
a5390dce | 1052 | error = EISDIR; |
4f083fd7 SL |
1053 | goto bad; |
1054 | } | |
7188ac27 KM |
1055 | if (error = dirrewrite(dp, ip, tndp)) |
1056 | goto bad; | |
a62786b9 KM |
1057 | /* |
1058 | * If the target directory is in the same | |
1059 | * directory as the source directory, | |
1060 | * decrement the link count on the parent | |
1061 | * of the target directory. | |
1062 | */ | |
1063 | if (doingdirectory && !newparent) { | |
1064 | dp->i_nlink--; | |
1065 | dp->i_flag |= ICHG; | |
1066 | } | |
7188ac27 | 1067 | vput(ITOV(dp)); |
4f083fd7 | 1068 | /* |
a5390dce SL |
1069 | * Adjust the link count of the target to |
1070 | * reflect the dirrewrite above. If this is | |
1071 | * a directory it is empty and there are | |
1072 | * no links to it, so we can squash the inode and | |
1073 | * any space associated with it. We disallowed | |
1074 | * renaming over top of a directory with links to | |
68f21562 KM |
1075 | * it above, as the remaining link would point to |
1076 | * a directory without "." or ".." entries. | |
4f083fd7 | 1077 | */ |
a5390dce | 1078 | xp->i_nlink--; |
4f083fd7 | 1079 | if (doingdirectory) { |
a5390dce SL |
1080 | if (--xp->i_nlink != 0) |
1081 | panic("rename: linked directory"); | |
e16fa59e | 1082 | error = itrunc(xp, (u_long)0, IO_SYNC); |
a5390dce | 1083 | } |
4f083fd7 | 1084 | xp->i_flag |= ICHG; |
88d931ba | 1085 | iput(xp); |
31db12cb | 1086 | xp = NULL; |
4f083fd7 SL |
1087 | } |
1088 | ||
1089 | /* | |
1090 | * 3) Unlink the source. | |
1091 | */ | |
10bae9ee KM |
1092 | fndp->ni_nameiop &= ~(MODMASK | OPMASK); |
1093 | fndp->ni_nameiop |= DELETE | LOCKPARENT | LOCKLEAF; | |
7188ac27 KM |
1094 | (void)namei(fndp); |
1095 | if (fndp->ni_vp != NULL) { | |
1096 | xp = VTOI(fndp->ni_vp); | |
1097 | dp = VTOI(fndp->ni_dvp); | |
1098 | } else { | |
d9d75b8f KM |
1099 | /* |
1100 | * From name has disappeared. | |
1101 | */ | |
1102 | if (doingdirectory) | |
1103 | panic("rename: lost dir entry"); | |
1104 | vrele(ITOV(ip)); | |
1105 | return (0); | |
7188ac27 | 1106 | } |
4f083fd7 | 1107 | /* |
7188ac27 | 1108 | * Ensure that the directory entry still exists and has not |
68f21562 KM |
1109 | * changed while the new name has been entered. If the source is |
1110 | * a file then the entry may have been unlinked or renamed. In | |
1111 | * either case there is no further work to be done. If the source | |
1112 | * is a directory then it cannot have been rmdir'ed; its link | |
1113 | * count of three would cause a rmdir to fail with ENOTEMPTY. | |
7188ac27 | 1114 | * The IRENAME flag ensures that it cannot be moved by another |
68f21562 | 1115 | * rename. |
4f083fd7 | 1116 | */ |
4f1a9037 | 1117 | if (xp != ip) { |
68f21562 | 1118 | if (doingdirectory) |
4f1a9037 | 1119 | panic("rename: lost dir entry"); |
68f21562 | 1120 | } else { |
4f083fd7 | 1121 | /* |
68f21562 KM |
1122 | * If the source is a directory with a |
1123 | * new parent, the link count of the old | |
1124 | * parent directory must be decremented | |
1125 | * and ".." set to point to the new parent. | |
4f083fd7 | 1126 | */ |
68f21562 | 1127 | if (doingdirectory && newparent) { |
4f083fd7 SL |
1128 | dp->i_nlink--; |
1129 | dp->i_flag |= ICHG; | |
86cdabf6 | 1130 | error = vn_rdwr(UIO_READ, ITOV(xp), (caddr_t)&dirbuf, |
7188ac27 | 1131 | sizeof (struct dirtemplate), (off_t)0, |
86cdabf6 KM |
1132 | UIO_SYSSPACE, IO_NODELOCKED, |
1133 | tndp->ni_cred, (int *)0); | |
68f21562 KM |
1134 | if (error == 0) { |
1135 | if (dirbuf.dotdot_namlen != 2 || | |
1136 | dirbuf.dotdot_name[0] != '.' || | |
1137 | dirbuf.dotdot_name[1] != '.') { | |
8ad54d9e | 1138 | dirbad(xp, 12, "rename: mangled dir"); |
68f21562 KM |
1139 | } else { |
1140 | dirbuf.dotdot_ino = newparent; | |
86cdabf6 | 1141 | (void) vn_rdwr(UIO_WRITE, ITOV(xp), |
68f21562 KM |
1142 | (caddr_t)&dirbuf, |
1143 | sizeof (struct dirtemplate), | |
93e273b9 | 1144 | (off_t)0, UIO_SYSSPACE, |
86cdabf6 | 1145 | IO_NODELOCKED|IO_SYNC, |
7188ac27 KM |
1146 | tndp->ni_cred, (int *)0); |
1147 | cache_purge(ITOV(dp)); | |
68f21562 KM |
1148 | } |
1149 | } | |
4f083fd7 | 1150 | } |
7188ac27 KM |
1151 | error = dirremove(fndp); |
1152 | if (!error) { | |
68f21562 KM |
1153 | xp->i_nlink--; |
1154 | xp->i_flag |= ICHG; | |
4f083fd7 | 1155 | } |
68f21562 | 1156 | xp->i_flag &= ~IRENAME; |
4f083fd7 | 1157 | } |
4f083fd7 | 1158 | if (dp) |
7188ac27 | 1159 | vput(ITOV(dp)); |
68f21562 | 1160 | if (xp) |
7188ac27 KM |
1161 | vput(ITOV(xp)); |
1162 | vrele(ITOV(ip)); | |
1163 | return (error); | |
a5390dce | 1164 | |
4f083fd7 | 1165 | bad: |
4f083fd7 | 1166 | if (xp) |
7188ac27 KM |
1167 | vput(ITOV(xp)); |
1168 | vput(ITOV(dp)); | |
4f083fd7 SL |
1169 | out: |
1170 | ip->i_nlink--; | |
1171 | ip->i_flag |= ICHG; | |
7188ac27 KM |
1172 | vrele(ITOV(ip)); |
1173 | return (error); | |
64d3a787 | 1174 | } |
88a7a62a SL |
1175 | |
1176 | /* | |
1177 | * A virgin directory (no blushing please). | |
1178 | */ | |
1179 | struct dirtemplate mastertemplate = { | |
1180 | 0, 12, 1, ".", | |
1181 | 0, DIRBLKSIZ - 12, 2, ".." | |
1182 | }; | |
1183 | ||
1184 | /* | |
1185 | * Mkdir system call | |
1186 | */ | |
7188ac27 KM |
1187 | ufs_mkdir(ndp, vap) |
1188 | struct nameidata *ndp; | |
1189 | struct vattr *vap; | |
88a7a62a | 1190 | { |
88a7a62a | 1191 | register struct inode *ip, *dp; |
7188ac27 KM |
1192 | struct inode *tip; |
1193 | struct vnode *dvp; | |
88a7a62a | 1194 | struct dirtemplate dirtemplate; |
7188ac27 KM |
1195 | int error; |
1196 | int dmode; | |
1197 | ||
1198 | dvp = ndp->ni_dvp; | |
1199 | dp = VTOI(dvp); | |
986aedaa KM |
1200 | if ((unsigned short)dp->i_nlink >= LINK_MAX) { |
1201 | iput(dp); | |
1202 | return (EMLINK); | |
1203 | } | |
7188ac27 KM |
1204 | dmode = vap->va_mode&0777; |
1205 | dmode |= IFDIR; | |
88a7a62a SL |
1206 | /* |
1207 | * Must simulate part of maknode here | |
1208 | * in order to acquire the inode, but | |
1209 | * not have it entered in the parent | |
1210 | * directory. The entry is made later | |
1211 | * after writing "." and ".." entries out. | |
1212 | */ | |
4b61628b | 1213 | if (error = ialloc(dp, dirpref(dp->i_fs), dmode, ndp->ni_cred, &tip)) { |
88a7a62a | 1214 | iput(dp); |
7188ac27 | 1215 | return (error); |
88a7a62a | 1216 | } |
7188ac27 | 1217 | ip = tip; |
4b61628b KM |
1218 | ip->i_uid = ndp->ni_cred->cr_uid; |
1219 | ip->i_gid = dp->i_gid; | |
88a7a62a | 1220 | #ifdef QUOTA |
4b61628b KM |
1221 | if ((error = getinoquota(ip)) || |
1222 | (error = chkiq(ip, 1, ndp->ni_cred, 0))) { | |
1223 | ifree(ip, ip->i_number, dmode); | |
1224 | iput(ip); | |
1225 | iput(dp); | |
1226 | return (error); | |
1227 | } | |
88a7a62a SL |
1228 | #endif |
1229 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
1230 | ip->i_mode = dmode; |
1231 | ITOV(ip)->v_type = VDIR; /* Rest init'd in iget() */ | |
88a7a62a | 1232 | ip->i_nlink = 2; |
7188ac27 | 1233 | error = iupdat(ip, &time, &time, 1); |
88a7a62a SL |
1234 | |
1235 | /* | |
1236 | * Bump link count in parent directory | |
1237 | * to reflect work done below. Should | |
1238 | * be done before reference is created | |
1239 | * so reparation is possible if we crash. | |
1240 | */ | |
1241 | dp->i_nlink++; | |
1242 | dp->i_flag |= ICHG; | |
394d67a8 KM |
1243 | if (error = iupdat(dp, &time, &time, 1)) |
1244 | goto bad; | |
88a7a62a SL |
1245 | |
1246 | /* | |
1247 | * Initialize directory with "." | |
1248 | * and ".." from static template. | |
1249 | */ | |
1250 | dirtemplate = mastertemplate; | |
1251 | dirtemplate.dot_ino = ip->i_number; | |
1252 | dirtemplate.dotdot_ino = dp->i_number; | |
86cdabf6 | 1253 | error = vn_rdwr(UIO_WRITE, ITOV(ip), (caddr_t)&dirtemplate, |
7188ac27 | 1254 | sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, |
86cdabf6 | 1255 | IO_NODELOCKED|IO_SYNC, ndp->ni_cred, (int *)0); |
7188ac27 | 1256 | if (error) { |
88a7a62a SL |
1257 | dp->i_nlink--; |
1258 | dp->i_flag |= ICHG; | |
1259 | goto bad; | |
1260 | } | |
15365e07 | 1261 | if (DIRBLKSIZ > dp->i_fs->fs_fsize) { |
7188ac27 | 1262 | panic("mkdir: blksize"); /* XXX - should grow w/balloc() */ |
15365e07 | 1263 | } else { |
23de9f20 | 1264 | ip->i_size = DIRBLKSIZ; |
15365e07 KM |
1265 | ip->i_flag |= ICHG; |
1266 | } | |
88a7a62a SL |
1267 | /* |
1268 | * Directory all set up, now | |
1269 | * install the entry for it in | |
1270 | * the parent directory. | |
1271 | */ | |
394d67a8 | 1272 | if (error = direnter(ip, ndp)) { |
10bae9ee | 1273 | ndp->ni_nameiop &= ~(MODMASK | OPMASK); |
394d67a8 | 1274 | ndp->ni_nameiop |= LOOKUP | LOCKLEAF | NOCACHE; |
7188ac27 KM |
1275 | error = namei(ndp); |
1276 | if (!error) { | |
394d67a8 | 1277 | iput(dp); |
7188ac27 | 1278 | dp = VTOI(ndp->ni_vp); |
88a7a62a SL |
1279 | dp->i_nlink--; |
1280 | dp->i_flag |= ICHG; | |
1281 | } | |
1282 | } | |
1283 | bad: | |
1284 | /* | |
1285 | * No need to do an explicit itrunc here, | |
7188ac27 | 1286 | * vrele will do this for us because we set |
88a7a62a SL |
1287 | * the link count to 0. |
1288 | */ | |
7188ac27 | 1289 | if (error) { |
88a7a62a SL |
1290 | ip->i_nlink = 0; |
1291 | ip->i_flag |= ICHG; | |
cbcdacd6 KM |
1292 | iput(ip); |
1293 | } else | |
1294 | ndp->ni_vp = ITOV(ip); | |
394d67a8 | 1295 | iput(dp); |
7188ac27 | 1296 | return (error); |
88a7a62a SL |
1297 | } |
1298 | ||
1299 | /* | |
1300 | * Rmdir system call. | |
1301 | */ | |
7188ac27 KM |
1302 | ufs_rmdir(ndp) |
1303 | register struct nameidata *ndp; | |
88a7a62a | 1304 | { |
88a7a62a | 1305 | register struct inode *ip, *dp; |
7188ac27 KM |
1306 | int error = 0; |
1307 | ||
1308 | ip = VTOI(ndp->ni_vp); | |
1309 | dp = VTOI(ndp->ni_dvp); | |
88a7a62a SL |
1310 | /* |
1311 | * No rmdir "." please. | |
1312 | */ | |
1313 | if (dp == ip) { | |
7188ac27 | 1314 | vrele(ITOV(dp)); |
88a7a62a | 1315 | iput(ip); |
7188ac27 | 1316 | return (EINVAL); |
88a7a62a SL |
1317 | } |
1318 | /* | |
1319 | * Verify the directory is empty (and valid). | |
1320 | * (Rmdir ".." won't be valid since | |
1321 | * ".." will contain a reference to | |
1322 | * the current directory and thus be | |
1323 | * non-empty.) | |
1324 | */ | |
7188ac27 KM |
1325 | if (ip->i_nlink != 2 || !dirempty(ip, dp->i_number, ndp->ni_cred)) { |
1326 | error = ENOTEMPTY; | |
88a7a62a SL |
1327 | goto out; |
1328 | } | |
1329 | /* | |
1330 | * Delete reference to directory before purging | |
1331 | * inode. If we crash in between, the directory | |
1332 | * will be reattached to lost+found, | |
1333 | */ | |
7188ac27 | 1334 | if (error = dirremove(ndp)) |
88a7a62a SL |
1335 | goto out; |
1336 | dp->i_nlink--; | |
1337 | dp->i_flag |= ICHG; | |
7188ac27 | 1338 | cache_purge(ITOV(dp)); |
88a7a62a | 1339 | iput(dp); |
7188ac27 | 1340 | ndp->ni_dvp = NULL; |
88a7a62a SL |
1341 | /* |
1342 | * Truncate inode. The only stuff left | |
1343 | * in the directory is "." and "..". The | |
1344 | * "." reference is inconsequential since | |
1345 | * we're quashing it. The ".." reference | |
1346 | * has already been adjusted above. We've | |
1347 | * removed the "." reference and the reference | |
1348 | * in the parent directory, but there may be | |
1349 | * other hard links so decrement by 2 and | |
1350 | * worry about them later. | |
1351 | */ | |
1352 | ip->i_nlink -= 2; | |
e16fa59e | 1353 | error = itrunc(ip, (u_long)0, IO_SYNC); |
7188ac27 | 1354 | cache_purge(ITOV(ip)); |
88a7a62a | 1355 | out: |
7188ac27 | 1356 | if (ndp->ni_dvp) |
88a7a62a SL |
1357 | iput(dp); |
1358 | iput(ip); | |
7188ac27 | 1359 | return (error); |
88a7a62a SL |
1360 | } |
1361 | ||
7188ac27 KM |
1362 | /* |
1363 | * symlink -- make a symbolic link | |
1364 | */ | |
1365 | ufs_symlink(ndp, vap, target) | |
1366 | struct nameidata *ndp; | |
1367 | struct vattr *vap; | |
1368 | char *target; | |
1369 | { | |
1370 | struct inode *ip; | |
1371 | int error; | |
1372 | ||
1373 | error = maknode(IFLNK | vap->va_mode, ndp, &ip); | |
1374 | if (error) | |
1375 | return (error); | |
86cdabf6 KM |
1376 | error = vn_rdwr(UIO_WRITE, ITOV(ip), target, strlen(target), (off_t)0, |
1377 | UIO_SYSSPACE, IO_NODELOCKED, ndp->ni_cred, (int *)0); | |
7188ac27 KM |
1378 | iput(ip); |
1379 | return (error); | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * Vnode op for read and write | |
1384 | */ | |
930730fd | 1385 | ufs_readdir(vp, uio, cred, eofflagp) |
7188ac27 KM |
1386 | struct vnode *vp; |
1387 | register struct uio *uio; | |
7188ac27 | 1388 | struct ucred *cred; |
930730fd | 1389 | int *eofflagp; |
88a7a62a | 1390 | { |
86cdabf6 | 1391 | int count, lost, error; |
88a7a62a | 1392 | |
7188ac27 KM |
1393 | count = uio->uio_resid; |
1394 | count &= ~(DIRBLKSIZ - 1); | |
86cdabf6 KM |
1395 | lost = uio->uio_resid - count; |
1396 | if (count < DIRBLKSIZ || (uio->uio_offset & (DIRBLKSIZ -1))) | |
7188ac27 | 1397 | return (EINVAL); |
7188ac27 KM |
1398 | uio->uio_resid = count; |
1399 | uio->uio_iov->iov_len = count; | |
86cdabf6 KM |
1400 | error = ufs_read(vp, uio, 0, cred); |
1401 | uio->uio_resid += lost; | |
930730fd KM |
1402 | if ((VTOI(vp)->i_size - uio->uio_offset) <= 0) |
1403 | *eofflagp = 1; | |
1404 | else | |
1405 | *eofflagp = 0; | |
7188ac27 KM |
1406 | return (error); |
1407 | } | |
1408 | ||
1409 | /* | |
1410 | * Return target name of a symbolic link | |
1411 | */ | |
1412 | ufs_readlink(vp, uiop, cred) | |
1413 | struct vnode *vp; | |
1414 | struct uio *uiop; | |
1415 | struct ucred *cred; | |
1416 | { | |
1417 | ||
86cdabf6 | 1418 | return (ufs_read(vp, uiop, 0, cred)); |
7188ac27 KM |
1419 | } |
1420 | ||
1421 | /* | |
1422 | * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually | |
66955caf | 1423 | * done. Nothing to do at the moment. |
7188ac27 | 1424 | */ |
66955caf | 1425 | /* ARGSUSED */ |
7188ac27 | 1426 | ufs_abortop(ndp) |
66955caf | 1427 | struct nameidata *ndp; |
7188ac27 | 1428 | { |
7188ac27 | 1429 | |
66955caf | 1430 | return (0); |
7188ac27 KM |
1431 | } |
1432 | ||
1c3ebc10 KM |
1433 | /* |
1434 | * Lock an inode. | |
1435 | */ | |
7188ac27 KM |
1436 | ufs_lock(vp) |
1437 | struct vnode *vp; | |
1438 | { | |
1439 | register struct inode *ip = VTOI(vp); | |
1440 | ||
1441 | ILOCK(ip); | |
1442 | return (0); | |
1443 | } | |
1444 | ||
1c3ebc10 KM |
1445 | /* |
1446 | * Unlock an inode. | |
1447 | */ | |
7188ac27 KM |
1448 | ufs_unlock(vp) |
1449 | struct vnode *vp; | |
1450 | { | |
1451 | register struct inode *ip = VTOI(vp); | |
1452 | ||
1453 | if (!(ip->i_flag & ILOCKED)) | |
1454 | panic("ufs_unlock NOT LOCKED"); | |
1455 | IUNLOCK(ip); | |
1456 | return (0); | |
1457 | } | |
1458 | ||
1c3ebc10 KM |
1459 | /* |
1460 | * Check for a locked inode. | |
1461 | */ | |
1462 | ufs_islocked(vp) | |
1463 | struct vnode *vp; | |
1464 | { | |
1465 | ||
1466 | if (VTOI(vp)->i_flag & ILOCKED) | |
1467 | return (1); | |
1468 | return (0); | |
1469 | } | |
1470 | ||
7188ac27 KM |
1471 | /* |
1472 | * Get access to bmap | |
1473 | */ | |
1474 | ufs_bmap(vp, bn, vpp, bnp) | |
1475 | struct vnode *vp; | |
1476 | daddr_t bn; | |
1477 | struct vnode **vpp; | |
1478 | daddr_t *bnp; | |
1479 | { | |
1480 | struct inode *ip = VTOI(vp); | |
1481 | ||
1482 | if (vpp != NULL) | |
1483 | *vpp = ip->i_devvp; | |
1484 | if (bnp == NULL) | |
1485 | return (0); | |
4f1ff475 | 1486 | return (bmap(ip, bn, bnp)); |
88a7a62a SL |
1487 | } |
1488 | ||
1489 | /* | |
4f1ff475 KM |
1490 | * Calculate the logical to physical mapping if not done already, |
1491 | * then call the device strategy routine. | |
88a7a62a | 1492 | */ |
4f1ff475 | 1493 | int checkoverlap = 0; |
e16fa59e | 1494 | |
7188ac27 KM |
1495 | ufs_strategy(bp) |
1496 | register struct buf *bp; | |
88a7a62a | 1497 | { |
e16fa59e | 1498 | register struct inode *ip = VTOI(bp->b_vp); |
e16fa59e | 1499 | struct vnode *vp; |
e16fa59e KM |
1500 | int error; |
1501 | ||
1502 | if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) | |
1503 | panic("ufs_strategy: spec"); | |
1504 | if (bp->b_blkno == bp->b_lblkno) { | |
1505 | if (error = bmap(ip, bp->b_lblkno, &bp->b_blkno)) | |
1506 | return (error); | |
20aa076b | 1507 | if ((long)bp->b_blkno == -1) |
e16fa59e | 1508 | clrbuf(bp); |
e16fa59e | 1509 | } |
20aa076b KM |
1510 | if ((long)bp->b_blkno == -1) { |
1511 | biodone(bp); | |
e16fa59e | 1512 | return (0); |
20aa076b | 1513 | } |
4f1ff475 | 1514 | #ifdef DIAGNOSTIC |
e16fa59e | 1515 | if (checkoverlap) { |
4f1ff475 KM |
1516 | register struct buf *ep; |
1517 | struct buf *ebp; | |
1518 | daddr_t start, last; | |
1519 | ||
e16fa59e KM |
1520 | ebp = &buf[nbuf]; |
1521 | start = bp->b_blkno; | |
1522 | last = start + btodb(bp->b_bcount) - 1; | |
1523 | for (ep = buf; ep < ebp; ep++) { | |
1524 | if (ep == bp || (ep->b_flags & B_INVAL) || | |
fcd4f15a | 1525 | ep->b_vp == NULLVP) |
e16fa59e KM |
1526 | continue; |
1527 | if (VOP_BMAP(ep->b_vp, (daddr_t)0, &vp, (daddr_t)0)) | |
1528 | continue; | |
1529 | if (vp != ip->i_devvp) | |
1530 | continue; | |
1531 | /* look for overlap */ | |
1532 | if (ep->b_bcount == 0 || ep->b_blkno > last || | |
1533 | ep->b_blkno + btodb(ep->b_bcount) <= start) | |
1534 | continue; | |
20aa076b KM |
1535 | vprint("Disk overlap", vp); |
1536 | printf("\tstart %d, end %d overlap start %d, end %d\n", | |
1537 | start, last, ep->b_blkno, | |
1538 | ep->b_blkno + btodb(ep->b_bcount) - 1); | |
4f1ff475 | 1539 | panic("Disk buffer overlap"); |
e16fa59e KM |
1540 | } |
1541 | } | |
4f1ff475 | 1542 | #endif /* DIAGNOSTIC */ |
e16fa59e KM |
1543 | vp = ip->i_devvp; |
1544 | bp->b_dev = vp->v_rdev; | |
1545 | (*(vp->v_op->vn_strategy))(bp); | |
7188ac27 KM |
1546 | return (0); |
1547 | } | |
88a7a62a | 1548 | |
e16fa59e KM |
1549 | /* |
1550 | * Print out the contents of an inode. | |
1551 | */ | |
1552 | ufs_print(vp) | |
1553 | struct vnode *vp; | |
1554 | { | |
1555 | register struct inode *ip = VTOI(vp); | |
1556 | ||
a8f829ed KM |
1557 | printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number, |
1558 | major(ip->i_dev), minor(ip->i_dev)); | |
1559 | #ifdef FIFO | |
1560 | if (vp->v_type == VFIFO) | |
1561 | fifo_printinfo(vp); | |
1562 | #endif /* FIFO */ | |
1563 | printf("%s\n", (ip->i_flag & ILOCKED) ? " (LOCKED)" : ""); | |
96bae3e0 KM |
1564 | if (ip->i_spare0 == 0) |
1565 | return; | |
1566 | printf("\towner pid %d", ip->i_spare0); | |
1567 | if (ip->i_spare1) | |
1568 | printf(" waiting pid %d", ip->i_spare1); | |
1569 | printf("\n"); | |
e16fa59e KM |
1570 | } |
1571 | ||
24a31b70 KM |
1572 | /* |
1573 | * Read wrapper for special devices. | |
1574 | */ | |
1575 | ufsspec_read(vp, uio, ioflag, cred) | |
1576 | struct vnode *vp; | |
1577 | struct uio *uio; | |
1578 | int ioflag; | |
1579 | struct ucred *cred; | |
1580 | { | |
1581 | ||
1582 | /* | |
1583 | * Set access flag. | |
1584 | */ | |
1585 | VTOI(vp)->i_flag |= IACC; | |
1586 | return (spec_read(vp, uio, ioflag, cred)); | |
1587 | } | |
1588 | ||
1589 | /* | |
1590 | * Write wrapper for special devices. | |
1591 | */ | |
1592 | ufsspec_write(vp, uio, ioflag, cred) | |
1593 | struct vnode *vp; | |
1594 | struct uio *uio; | |
1595 | int ioflag; | |
1596 | struct ucred *cred; | |
1597 | { | |
1598 | ||
1599 | /* | |
1600 | * Set update and change flags. | |
1601 | */ | |
1602 | VTOI(vp)->i_flag |= IUPD|ICHG; | |
1603 | return (spec_write(vp, uio, ioflag, cred)); | |
1604 | } | |
1605 | ||
1606 | /* | |
1607 | * Close wrapper for special devices. | |
1608 | * | |
1609 | * Update the times on the inode then do device close. | |
1610 | */ | |
1611 | ufsspec_close(vp, fflag, cred) | |
1612 | struct vnode *vp; | |
1613 | int fflag; | |
1614 | struct ucred *cred; | |
1615 | { | |
1616 | register struct inode *ip = VTOI(vp); | |
1617 | ||
de67eefc | 1618 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
24a31b70 KM |
1619 | ITIMES(ip, &time, &time); |
1620 | return (spec_close(vp, fflag, cred)); | |
1621 | } | |
1622 | ||
d1c43d7f KM |
1623 | #ifdef FIFO |
1624 | /* | |
1625 | * Read wrapper for fifo's | |
1626 | */ | |
1627 | ufsfifo_read(vp, uio, ioflag, cred) | |
1628 | struct vnode *vp; | |
1629 | struct uio *uio; | |
1630 | int ioflag; | |
1631 | struct ucred *cred; | |
1632 | { | |
1633 | ||
1634 | /* | |
1635 | * Set access flag. | |
1636 | */ | |
1637 | VTOI(vp)->i_flag |= IACC; | |
1638 | return (fifo_read(vp, uio, ioflag, cred)); | |
1639 | } | |
1640 | ||
1641 | /* | |
1642 | * Write wrapper for fifo's. | |
1643 | */ | |
1644 | ufsfifo_write(vp, uio, ioflag, cred) | |
1645 | struct vnode *vp; | |
1646 | struct uio *uio; | |
1647 | int ioflag; | |
1648 | struct ucred *cred; | |
1649 | { | |
1650 | ||
1651 | /* | |
1652 | * Set update and change flags. | |
1653 | */ | |
1654 | VTOI(vp)->i_flag |= IUPD|ICHG; | |
1655 | return (fifo_write(vp, uio, ioflag, cred)); | |
1656 | } | |
1657 | ||
1658 | /* | |
1659 | * Close wrapper for fifo's. | |
1660 | * | |
1661 | * Update the times on the inode then do device close. | |
1662 | */ | |
1663 | ufsfifo_close(vp, fflag, cred) | |
1664 | struct vnode *vp; | |
1665 | int fflag; | |
1666 | struct ucred *cred; | |
1667 | { | |
1668 | register struct inode *ip = VTOI(vp); | |
1669 | ||
1670 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) | |
1671 | ITIMES(ip, &time, &time); | |
1672 | return (fifo_close(vp, fflag, cred)); | |
1673 | } | |
1674 | #endif /* FIFO */ | |
1675 | ||
7188ac27 KM |
1676 | /* |
1677 | * Make a new file. | |
1678 | */ | |
1679 | maknode(mode, ndp, ipp) | |
1680 | int mode; | |
1681 | register struct nameidata *ndp; | |
1682 | struct inode **ipp; | |
1683 | { | |
1684 | register struct inode *ip; | |
1685 | struct inode *tip; | |
1686 | register struct inode *pdir = VTOI(ndp->ni_dvp); | |
1687 | ino_t ipref; | |
1688 | int error; | |
1689 | ||
1690 | *ipp = 0; | |
4b61628b KM |
1691 | if ((mode & IFMT) == 0) |
1692 | mode |= IFREG; | |
7188ac27 KM |
1693 | if ((mode & IFMT) == IFDIR) |
1694 | ipref = dirpref(pdir->i_fs); | |
1695 | else | |
1696 | ipref = pdir->i_number; | |
4b61628b | 1697 | if (error = ialloc(pdir, ipref, mode, ndp->ni_cred, &tip)) { |
7188ac27 KM |
1698 | iput(pdir); |
1699 | return (error); | |
1700 | } | |
1701 | ip = tip; | |
4b61628b KM |
1702 | ip->i_uid = ndp->ni_cred->cr_uid; |
1703 | ip->i_gid = pdir->i_gid; | |
7188ac27 | 1704 | #ifdef QUOTA |
4b61628b KM |
1705 | if ((error = getinoquota(ip)) || |
1706 | (error = chkiq(ip, 1, ndp->ni_cred, 0))) { | |
1707 | ifree(ip, ip->i_number, mode); | |
1708 | iput(ip); | |
1709 | iput(pdir); | |
1710 | return (error); | |
1711 | } | |
7188ac27 KM |
1712 | #endif |
1713 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
1714 | ip->i_mode = mode; |
1715 | ITOV(ip)->v_type = IFTOVT(mode); /* Rest init'd in iget() */ | |
1716 | ip->i_nlink = 1; | |
7188ac27 KM |
1717 | if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, ndp->ni_cred) && |
1718 | suser(ndp->ni_cred, NULL)) | |
1719 | ip->i_mode &= ~ISGID; | |
7188ac27 KM |
1720 | |
1721 | /* | |
1722 | * Make sure inode goes to disk before directory entry. | |
1723 | */ | |
4b61628b KM |
1724 | if (error = iupdat(ip, &time, &time, 1)) |
1725 | goto bad; | |
394d67a8 | 1726 | if (error = direnter(ip, ndp)) |
4b61628b | 1727 | goto bad; |
394d67a8 | 1728 | iput(pdir); |
7188ac27 KM |
1729 | *ipp = ip; |
1730 | return (0); | |
4b61628b KM |
1731 | |
1732 | bad: | |
1733 | /* | |
1734 | * Write error occurred trying to update the inode | |
1735 | * or the directory so must deallocate the inode. | |
1736 | */ | |
394d67a8 | 1737 | iput(pdir); |
4b61628b KM |
1738 | ip->i_nlink = 0; |
1739 | ip->i_flag |= ICHG; | |
1740 | iput(ip); | |
1741 | return (error); | |
88a7a62a | 1742 | } |
0b0bf936 KM |
1743 | |
1744 | /* | |
1745 | * Advisory record locking support | |
1746 | */ | |
1747 | ufs_advlock(vp, id, op, fl, flags) | |
1748 | struct vnode *vp; | |
1749 | caddr_t id; | |
1750 | int op; | |
1751 | register struct flock *fl; | |
1752 | int flags; | |
1753 | { | |
1754 | register struct inode *ip = VTOI(vp); | |
1755 | register struct lockf *lock; | |
1756 | off_t start, end; | |
1757 | int error; | |
1758 | ||
1759 | /* | |
1760 | * Avoid the common case of unlocking when inode has no locks. | |
1761 | */ | |
1762 | if (ip->i_lockf == (struct lockf *)0) { | |
1763 | if (op != F_SETLK) { | |
1764 | fl->l_type = F_UNLCK; | |
1765 | return (0); | |
1766 | } | |
1767 | } | |
1768 | /* | |
1769 | * Convert the flock structure into a start and end. | |
1770 | */ | |
1771 | switch (fl->l_whence) { | |
1772 | ||
1773 | case SEEK_SET: | |
1774 | case SEEK_CUR: | |
1775 | /* | |
1776 | * Caller is responsible for adding any necessary offset | |
1777 | * when SEEK_CUR is used. | |
1778 | */ | |
1779 | start = fl->l_start; | |
1780 | break; | |
1781 | ||
1782 | case SEEK_END: | |
1783 | start = ip->i_size + fl->l_start; | |
1784 | break; | |
1785 | ||
1786 | default: | |
1787 | return (EINVAL); | |
1788 | } | |
1789 | if (start < 0) | |
1790 | return (EINVAL); | |
1791 | if (fl->l_len == 0) | |
1792 | end = -1; | |
1793 | else | |
c412cb68 | 1794 | end = start + fl->l_len - 1; |
0b0bf936 KM |
1795 | /* |
1796 | * Create the lockf structure | |
1797 | */ | |
1798 | MALLOC(lock, struct lockf *, sizeof *lock, M_LOCKF, M_WAITOK); | |
1799 | lock->lf_start = start; | |
1800 | lock->lf_end = end; | |
1801 | lock->lf_id = id; | |
1802 | lock->lf_inode = ip; | |
1803 | lock->lf_type = fl->l_type; | |
1804 | lock->lf_next = (struct lockf *)0; | |
1805 | lock->lf_block = (struct lockf *)0; | |
1806 | lock->lf_flags = flags; | |
1807 | /* | |
1808 | * Do the requested operation. | |
1809 | */ | |
1810 | switch(op) { | |
1811 | case F_SETLK: | |
b9fc1077 | 1812 | return (lf_setlock(lock)); |
0b0bf936 KM |
1813 | |
1814 | case F_UNLCK: | |
b9fc1077 KM |
1815 | error = lf_clearlock(lock); |
1816 | FREE(lock, M_LOCKF); | |
1817 | return (error); | |
0b0bf936 KM |
1818 | |
1819 | case F_GETLK: | |
b9fc1077 KM |
1820 | error = lf_getlock(lock, fl); |
1821 | FREE(lock, M_LOCKF); | |
1822 | return (error); | |
0b0bf936 KM |
1823 | |
1824 | default: | |
1825 | free(lock, M_LOCKF); | |
1826 | return (EINVAL); | |
1827 | } | |
1828 | /* NOTREACHED */ | |
1829 | } |