Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
7188ac27 KM |
2 | * Copyright (c) 1982, 1986, 1989 Regents of the University of California. |
3 | * All rights reserved. | |
da7c5cc6 | 4 | * |
b702c21d | 5 | * %sccs.include.redist.c% |
7188ac27 | 6 | * |
d9d75b8f | 7 | * @(#)lfs_vnops.c 7.51 (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 KM |
115 | spec_badop(), |
116 | spec_nullop(); | |
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 */ | |
132 | spec_nullop, /* fsync */ | |
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(), |
d1c43d7f KM |
165 | fifo_badop(), |
166 | fifo_nullop(); | |
167 | ||
168 | struct vnodeops fifo_inodeops = { | |
169 | fifo_lookup, /* lookup */ | |
170 | fifo_badop, /* create */ | |
171 | fifo_badop, /* mknod */ | |
172 | fifo_open, /* open */ | |
173 | ufsfifo_close, /* close */ | |
174 | ufs_access, /* access */ | |
175 | ufs_getattr, /* getattr */ | |
176 | ufs_setattr, /* setattr */ | |
177 | ufsfifo_read, /* read */ | |
178 | ufsfifo_write, /* write */ | |
179 | fifo_ioctl, /* ioctl */ | |
180 | fifo_select, /* select */ | |
181 | fifo_badop, /* mmap */ | |
182 | fifo_nullop, /* fsync */ | |
183 | fifo_badop, /* seek */ | |
184 | fifo_badop, /* remove */ | |
185 | fifo_badop, /* link */ | |
186 | fifo_badop, /* rename */ | |
187 | fifo_badop, /* mkdir */ | |
188 | fifo_badop, /* rmdir */ | |
189 | fifo_badop, /* symlink */ | |
190 | fifo_badop, /* readdir */ | |
191 | fifo_badop, /* readlink */ | |
192 | fifo_badop, /* abortop */ | |
193 | ufs_inactive, /* inactive */ | |
194 | ufs_reclaim, /* reclaim */ | |
195 | ufs_lock, /* lock */ | |
196 | ufs_unlock, /* unlock */ | |
197 | fifo_bmap, /* bmap */ | |
198 | fifo_badop, /* strategy */ | |
199 | ufs_print, /* print */ | |
200 | ufs_islocked, /* islocked */ | |
0b0bf936 | 201 | fifo_advlock, /* advlock */ |
d1c43d7f KM |
202 | }; |
203 | #endif /* FIFO */ | |
204 | ||
205 | enum vtype iftovt_tab[16] = { | |
206 | VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, | |
207 | VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, | |
7188ac27 | 208 | }; |
d1c43d7f KM |
209 | int vttoif_tab[9] = { |
210 | 0, IFREG, IFDIR, IFBLK, IFCHR, IFLNK, IFSOCK, IFIFO, IFMT, | |
7188ac27 | 211 | }; |
3e78e260 | 212 | |
4f083fd7 | 213 | /* |
7188ac27 | 214 | * Create a regular file |
4f083fd7 | 215 | */ |
7188ac27 KM |
216 | ufs_create(ndp, vap) |
217 | struct nameidata *ndp; | |
218 | struct vattr *vap; | |
3e78e260 | 219 | { |
7188ac27 KM |
220 | struct inode *ip; |
221 | int error; | |
3e78e260 | 222 | |
7188ac27 KM |
223 | if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip)) |
224 | return (error); | |
225 | ndp->ni_vp = ITOV(ip); | |
226 | return (0); | |
3e78e260 BJ |
227 | } |
228 | ||
4f083fd7 | 229 | /* |
7188ac27 | 230 | * Mknod vnode call |
4f083fd7 | 231 | */ |
7188ac27 KM |
232 | /* ARGSUSED */ |
233 | ufs_mknod(ndp, vap, cred) | |
234 | struct nameidata *ndp; | |
235 | struct ucred *cred; | |
236 | struct vattr *vap; | |
3e78e260 | 237 | { |
f09fe6d3 | 238 | register struct vnode *vp; |
7188ac27 KM |
239 | struct inode *ip; |
240 | int error; | |
3e78e260 | 241 | |
7188ac27 KM |
242 | if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip)) |
243 | return (error); | |
d1c43d7f KM |
244 | ip->i_flag |= IACC|IUPD|ICHG; |
245 | if (vap->va_rdev != VNOVAL) { | |
7188ac27 KM |
246 | /* |
247 | * Want to be able to use this to make badblock | |
248 | * inodes, so don't truncate the dev number. | |
249 | */ | |
b373e060 | 250 | ip->i_rdev = vap->va_rdev; |
7188ac27 | 251 | } |
7188ac27 KM |
252 | /* |
253 | * Remove inode so that it will be reloaded by iget and | |
254 | * checked to see if it is an alias of an existing entry | |
255 | * in the inode cache. | |
256 | */ | |
d1c43d7f KM |
257 | vp = ITOV(ip); |
258 | vput(vp); | |
f09fe6d3 KM |
259 | vp->v_type = VNON; |
260 | vgone(vp); | |
7188ac27 | 261 | return (0); |
3e78e260 BJ |
262 | } |
263 | ||
264 | /* | |
7188ac27 KM |
265 | * Open called. |
266 | * | |
267 | * Nothing to do. | |
3e78e260 | 268 | */ |
7188ac27 KM |
269 | /* ARGSUSED */ |
270 | ufs_open(vp, mode, cred) | |
271 | struct vnode *vp; | |
272 | int mode; | |
273 | struct ucred *cred; | |
3e78e260 | 274 | { |
3e78e260 | 275 | |
7188ac27 | 276 | return (0); |
3e78e260 BJ |
277 | } |
278 | ||
279 | /* | |
7188ac27 KM |
280 | * Close called |
281 | * | |
282 | * Update the times on the inode. | |
3e78e260 | 283 | */ |
7188ac27 KM |
284 | /* ARGSUSED */ |
285 | ufs_close(vp, fflag, cred) | |
286 | struct vnode *vp; | |
287 | int fflag; | |
288 | struct ucred *cred; | |
3e78e260 | 289 | { |
7188ac27 | 290 | register struct inode *ip = VTOI(vp); |
3e78e260 | 291 | |
de67eefc | 292 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
7188ac27 KM |
293 | ITIMES(ip, &time, &time); |
294 | return (0); | |
3e78e260 BJ |
295 | } |
296 | ||
4b61628b KM |
297 | /* |
298 | * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. | |
299 | * The mode is shifted to select the owner/group/other fields. The | |
300 | * super user is granted all permissions. | |
301 | */ | |
7188ac27 KM |
302 | ufs_access(vp, mode, cred) |
303 | struct vnode *vp; | |
4b61628b | 304 | register int mode; |
7188ac27 | 305 | struct ucred *cred; |
3e78e260 | 306 | { |
4b61628b KM |
307 | register struct inode *ip = VTOI(vp); |
308 | register gid_t *gp; | |
309 | int i, error; | |
3e78e260 | 310 | |
4b61628b KM |
311 | #ifdef DIAGNOSTIC |
312 | if (!VOP_ISLOCKED(vp)) { | |
313 | vprint("ufs_access: not locked", vp); | |
314 | panic("ufs_access: not locked"); | |
315 | } | |
316 | #endif | |
317 | #ifdef QUOTA | |
318 | if (mode & VWRITE) { | |
319 | switch (vp->v_type) { | |
320 | case VREG: case VDIR: case VLNK: | |
321 | if (error = getinoquota(ip)) | |
322 | return (error); | |
323 | } | |
324 | } | |
325 | #endif /* QUOTA */ | |
326 | /* | |
327 | * If you're the super-user, you always get access. | |
328 | */ | |
329 | if (cred->cr_uid == 0) | |
330 | return (0); | |
331 | /* | |
332 | * Access check is based on only one of owner, group, public. | |
333 | * If not owner, then check group. If not a member of the | |
334 | * group, then check public access. | |
335 | */ | |
336 | if (cred->cr_uid != ip->i_uid) { | |
337 | mode >>= 3; | |
338 | gp = cred->cr_groups; | |
339 | for (i = 0; i < cred->cr_ngroups; i++, gp++) | |
340 | if (ip->i_gid == *gp) | |
341 | goto found; | |
342 | mode >>= 3; | |
343 | found: | |
344 | ; | |
345 | } | |
346 | if ((ip->i_mode & mode) != 0) | |
347 | return (0); | |
348 | return (EACCES); | |
3e78e260 BJ |
349 | } |
350 | ||
7188ac27 KM |
351 | /* ARGSUSED */ |
352 | ufs_getattr(vp, vap, cred) | |
353 | struct vnode *vp; | |
354 | register struct vattr *vap; | |
355 | struct ucred *cred; | |
3e78e260 | 356 | { |
7188ac27 | 357 | register struct inode *ip = VTOI(vp); |
3e78e260 | 358 | |
7188ac27 | 359 | ITIMES(ip, &time, &time); |
3e78e260 | 360 | /* |
7188ac27 | 361 | * Copy from inode table |
3e78e260 | 362 | */ |
7188ac27 KM |
363 | vap->va_fsid = ip->i_dev; |
364 | vap->va_fileid = ip->i_number; | |
365 | vap->va_mode = ip->i_mode & ~IFMT; | |
366 | vap->va_nlink = ip->i_nlink; | |
367 | vap->va_uid = ip->i_uid; | |
368 | vap->va_gid = ip->i_gid; | |
369 | vap->va_rdev = (dev_t)ip->i_rdev; | |
4b61628b KM |
370 | #ifdef tahoe |
371 | vap->va_size = ip->i_size; | |
372 | vap->va_size_rsv = 0; | |
373 | #else | |
8fae943a | 374 | vap->va_qsize = ip->i_din.di_qsize; |
4b61628b | 375 | #endif |
7188ac27 | 376 | vap->va_atime.tv_sec = ip->i_atime; |
6ef53d70 | 377 | vap->va_atime.tv_usec = 0; |
7188ac27 | 378 | vap->va_mtime.tv_sec = ip->i_mtime; |
6ef53d70 | 379 | vap->va_mtime.tv_usec = 0; |
7188ac27 | 380 | vap->va_ctime.tv_sec = ip->i_ctime; |
6ef53d70 | 381 | vap->va_ctime.tv_usec = 0; |
d07fc92a KM |
382 | vap->va_flags = ip->i_flags; |
383 | vap->va_gen = ip->i_gen; | |
7188ac27 KM |
384 | /* this doesn't belong here */ |
385 | if (vp->v_type == VBLK) | |
386 | vap->va_blocksize = BLKDEV_IOSIZE; | |
387 | else if (vp->v_type == VCHR) | |
388 | vap->va_blocksize = MAXBSIZE; | |
8eee8525 | 389 | else |
7188ac27 | 390 | vap->va_blocksize = ip->i_fs->fs_bsize; |
a61a68d6 | 391 | vap->va_bytes = dbtob(ip->i_blocks); |
8fae943a | 392 | vap->va_bytes_rsv = 0; |
7188ac27 KM |
393 | vap->va_type = vp->v_type; |
394 | return (0); | |
3e78e260 BJ |
395 | } |
396 | ||
397 | /* | |
7188ac27 | 398 | * Set attribute vnode op. called from several syscalls |
3e78e260 | 399 | */ |
7188ac27 KM |
400 | ufs_setattr(vp, vap, cred) |
401 | register struct vnode *vp; | |
402 | register struct vattr *vap; | |
403 | register struct ucred *cred; | |
3e78e260 | 404 | { |
7188ac27 KM |
405 | register struct inode *ip = VTOI(vp); |
406 | int error = 0; | |
b4d1aee9 | 407 | |
7188ac27 KM |
408 | /* |
409 | * Check for unsetable attributes. | |
410 | */ | |
411 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || | |
412 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || | |
413 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || | |
d07fc92a | 414 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
7188ac27 | 415 | return (EINVAL); |
b4d1aee9 | 416 | } |
7188ac27 KM |
417 | /* |
418 | * Go through the fields and update iff not VNOVAL. | |
419 | */ | |
420 | if (vap->va_uid != (u_short)VNOVAL || vap->va_gid != (u_short)VNOVAL) | |
421 | if (error = chown1(vp, vap->va_uid, vap->va_gid, cred)) | |
422 | return (error); | |
423 | if (vap->va_size != VNOVAL) { | |
424 | if (vp->v_type == VDIR) | |
425 | return (EISDIR); | |
e16fa59e | 426 | if (error = itrunc(ip, vap->va_size, 0)) /* XXX IO_SYNC? */ |
7188ac27 | 427 | return (error); |
3e78e260 | 428 | } |
7188ac27 | 429 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { |
de412887 KM |
430 | if (cred->cr_uid != ip->i_uid && |
431 | (error = suser(cred, &u.u_acflag))) | |
432 | return (error); | |
7188ac27 KM |
433 | if (vap->va_atime.tv_sec != VNOVAL) |
434 | ip->i_flag |= IACC; | |
435 | if (vap->va_mtime.tv_sec != VNOVAL) | |
436 | ip->i_flag |= IUPD; | |
437 | ip->i_flag |= ICHG; | |
438 | if (error = iupdat(ip, &vap->va_atime, &vap->va_mtime, 1)) | |
439 | return (error); | |
5485e062 | 440 | } |
7188ac27 KM |
441 | if (vap->va_mode != (u_short)VNOVAL) |
442 | error = chmod1(vp, (int)vap->va_mode, cred); | |
d07fc92a KM |
443 | if (vap->va_flags != VNOVAL) { |
444 | if (cred->cr_uid != ip->i_uid && | |
445 | (error = suser(cred, &u.u_acflag))) | |
446 | return (error); | |
447 | if (cred->cr_uid == 0) { | |
448 | ip->i_flags = vap->va_flags; | |
449 | } else { | |
450 | ip->i_flags &= 0xffff0000; | |
451 | ip->i_flags |= (vap->va_flags & 0xffff); | |
452 | } | |
453 | ip->i_flag |= ICHG; | |
454 | } | |
7188ac27 | 455 | return (error); |
528f664c SL |
456 | } |
457 | ||
4f083fd7 SL |
458 | /* |
459 | * Change the mode on a file. | |
460 | * Inode must be locked before calling. | |
461 | */ | |
7188ac27 KM |
462 | chmod1(vp, mode, cred) |
463 | register struct vnode *vp; | |
528f664c | 464 | register int mode; |
7188ac27 | 465 | struct ucred *cred; |
528f664c | 466 | { |
7188ac27 | 467 | register struct inode *ip = VTOI(vp); |
de412887 | 468 | int error; |
197da11b | 469 | |
de412887 KM |
470 | if (cred->cr_uid != ip->i_uid && |
471 | (error = suser(cred, &u.u_acflag))) | |
472 | return (error); | |
7188ac27 | 473 | if (cred->cr_uid) { |
e57b6138 | 474 | if (vp->v_type != VDIR && (mode & ISVTX)) |
39b5be4c | 475 | return (EFTYPE); |
e57b6138 | 476 | if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) |
39b5be4c | 477 | return (EPERM); |
f94ceb3b | 478 | } |
39b5be4c | 479 | ip->i_mode &= ~07777; |
7188ac27 | 480 | ip->i_mode |= mode & 07777; |
3e78e260 | 481 | ip->i_flag |= ICHG; |
7188ac27 | 482 | if ((vp->v_flag & VTEXT) && (ip->i_mode & ISVTX) == 0) |
8986c97c | 483 | (void) vnode_pager_uncache(vp); |
47af7174 | 484 | return (0); |
5485e062 BJ |
485 | } |
486 | ||
528f664c SL |
487 | /* |
488 | * Perform chown operation on inode ip; | |
489 | * inode must be locked prior to call. | |
490 | */ | |
7188ac27 KM |
491 | chown1(vp, uid, gid, cred) |
492 | register struct vnode *vp; | |
493 | uid_t uid; | |
494 | gid_t gid; | |
495 | struct ucred *cred; | |
528f664c | 496 | { |
7188ac27 | 497 | register struct inode *ip = VTOI(vp); |
4b61628b KM |
498 | uid_t ouid; |
499 | gid_t ogid; | |
500 | int error = 0; | |
528f664c | 501 | #ifdef QUOTA |
4b61628b KM |
502 | register int i; |
503 | long change; | |
bb1b75f4 | 504 | #endif |
528f664c | 505 | |
7188ac27 | 506 | if (uid == (u_short)VNOVAL) |
bb1b75f4 | 507 | uid = ip->i_uid; |
7188ac27 | 508 | if (gid == (u_short)VNOVAL) |
bb1b75f4 | 509 | gid = ip->i_gid; |
18b0bce6 KB |
510 | /* |
511 | * If we don't own the file, are trying to change the owner | |
512 | * of the file, or are not a member of the target group, | |
513 | * the caller must be superuser or the call fails. | |
514 | */ | |
7188ac27 KM |
515 | if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid || |
516 | !groupmember((gid_t)gid, cred)) && | |
517 | (error = suser(cred, &u.u_acflag))) | |
518 | return (error); | |
4b61628b KM |
519 | ouid = ip->i_uid; |
520 | ogid = ip->i_gid; | |
bb1b75f4 | 521 | #ifdef QUOTA |
4b61628b KM |
522 | if (error = getinoquota(ip)) |
523 | return (error); | |
524 | if (ouid == uid) { | |
525 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
526 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
527 | } | |
528 | if (ogid == gid) { | |
529 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
530 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
531 | } | |
532 | change = ip->i_blocks; | |
533 | (void) chkdq(ip, -change, cred, CHOWN); | |
534 | (void) chkiq(ip, -1, cred, CHOWN); | |
535 | for (i = 0; i < MAXQUOTAS; i++) { | |
536 | dqrele(vp, ip->i_dquot[i]); | |
537 | ip->i_dquot[i] = NODQUOT; | |
538 | } | |
f94ceb3b | 539 | #endif |
bb1b75f4 SL |
540 | ip->i_uid = uid; |
541 | ip->i_gid = gid; | |
528f664c | 542 | #ifdef QUOTA |
4b61628b KM |
543 | if ((error = getinoquota(ip)) == 0) { |
544 | if (ouid == uid) { | |
545 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
546 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
547 | } | |
548 | if (ogid == gid) { | |
549 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
550 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
551 | } | |
552 | if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { | |
553 | if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) | |
722a9b31 | 554 | goto good; |
4b61628b KM |
555 | else |
556 | (void) chkdq(ip, -change, cred, CHOWN|FORCE); | |
557 | } | |
558 | for (i = 0; i < MAXQUOTAS; i++) { | |
559 | dqrele(vp, ip->i_dquot[i]); | |
560 | ip->i_dquot[i] = NODQUOT; | |
561 | } | |
562 | } | |
563 | ip->i_uid = ouid; | |
564 | ip->i_gid = ogid; | |
565 | if (getinoquota(ip) == 0) { | |
566 | if (ouid == uid) { | |
567 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
568 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
569 | } | |
570 | if (ogid == gid) { | |
571 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
572 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
573 | } | |
722a9b31 KM |
574 | (void) chkdq(ip, change, cred, FORCE|CHOWN); |
575 | (void) chkiq(ip, 1, cred, FORCE|CHOWN); | |
6cb69bbe | 576 | (void) getinoquota(ip); |
4b61628b | 577 | } |
6cb69bbe | 578 | return (error); |
722a9b31 | 579 | good: |
6cb69bbe KM |
580 | if (getinoquota(ip)) |
581 | panic("chown: lost quota"); | |
582 | #endif /* QUOTA */ | |
4b61628b KM |
583 | if (ouid != uid || ogid != gid) |
584 | ip->i_flag |= ICHG; | |
585 | if (ouid != uid && cred->cr_uid != 0) | |
586 | ip->i_mode &= ~ISUID; | |
587 | if (ogid != gid && cred->cr_uid != 0) | |
588 | ip->i_mode &= ~ISGID; | |
589 | return (0); | |
d67a03eb BJ |
590 | } |
591 | ||
b373e060 KM |
592 | /* |
593 | * Vnode op for reading. | |
594 | */ | |
595 | /* ARGSUSED */ | |
596 | ufs_read(vp, uio, ioflag, cred) | |
597 | struct vnode *vp; | |
598 | register struct uio *uio; | |
599 | int ioflag; | |
600 | struct ucred *cred; | |
601 | { | |
602 | register struct inode *ip = VTOI(vp); | |
603 | register struct fs *fs; | |
604 | struct buf *bp; | |
605 | daddr_t lbn, bn, rablock; | |
20aa076b | 606 | int size, diff, error = 0; |
b373e060 KM |
607 | long n, on, type; |
608 | ||
609 | if (uio->uio_rw != UIO_READ) | |
610 | panic("ufs_read mode"); | |
611 | type = ip->i_mode & IFMT; | |
612 | if (type != IFDIR && type != IFREG && type != IFLNK) | |
613 | panic("ufs_read type"); | |
614 | if (uio->uio_resid == 0) | |
615 | return (0); | |
616 | if (uio->uio_offset < 0) | |
617 | return (EINVAL); | |
618 | ip->i_flag |= IACC; | |
619 | fs = ip->i_fs; | |
620 | do { | |
621 | lbn = lblkno(fs, uio->uio_offset); | |
622 | on = blkoff(fs, uio->uio_offset); | |
623 | n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid); | |
624 | diff = ip->i_size - uio->uio_offset; | |
625 | if (diff <= 0) | |
626 | return (0); | |
627 | if (diff < n) | |
628 | n = diff; | |
b373e060 | 629 | size = blksize(fs, ip, lbn); |
e16fa59e | 630 | rablock = lbn + 1; |
20aa076b KM |
631 | if (vp->v_lastr + 1 == lbn && |
632 | lblktosize(fs, rablock) < ip->i_size) | |
633 | error = breada(ITOV(ip), lbn, size, rablock, | |
634 | blksize(fs, ip, rablock), NOCRED, &bp); | |
b373e060 | 635 | else |
e16fa59e | 636 | error = bread(ITOV(ip), lbn, size, NOCRED, &bp); |
de67eefc | 637 | vp->v_lastr = lbn; |
b373e060 KM |
638 | n = MIN(n, size - bp->b_resid); |
639 | if (error) { | |
640 | brelse(bp); | |
641 | return (error); | |
642 | } | |
643 | error = uiomove(bp->b_un.b_addr + on, (int)n, uio); | |
644 | if (n + on == fs->fs_bsize || uio->uio_offset == ip->i_size) | |
645 | bp->b_flags |= B_AGE; | |
646 | brelse(bp); | |
647 | } while (error == 0 && uio->uio_resid > 0 && n != 0); | |
648 | return (error); | |
649 | } | |
650 | ||
651 | /* | |
652 | * Vnode op for writing. | |
653 | */ | |
654 | ufs_write(vp, uio, ioflag, cred) | |
655 | register struct vnode *vp; | |
656 | struct uio *uio; | |
657 | int ioflag; | |
658 | struct ucred *cred; | |
659 | { | |
660 | register struct inode *ip = VTOI(vp); | |
661 | register struct fs *fs; | |
662 | struct buf *bp; | |
663 | daddr_t lbn, bn; | |
664 | u_long osize; | |
8986c97c KM |
665 | int n, on, flags; |
666 | int size, resid, error = 0; | |
b373e060 KM |
667 | |
668 | if (uio->uio_rw != UIO_WRITE) | |
669 | panic("ufs_write mode"); | |
670 | switch (vp->v_type) { | |
671 | case VREG: | |
672 | if (ioflag & IO_APPEND) | |
673 | uio->uio_offset = ip->i_size; | |
674 | /* fall through */ | |
675 | case VLNK: | |
676 | break; | |
677 | ||
678 | case VDIR: | |
679 | if ((ioflag & IO_SYNC) == 0) | |
680 | panic("ufs_write nonsync dir write"); | |
681 | break; | |
682 | ||
683 | default: | |
684 | panic("ufs_write type"); | |
685 | } | |
686 | if (uio->uio_offset < 0) | |
687 | return (EINVAL); | |
688 | if (uio->uio_resid == 0) | |
689 | return (0); | |
690 | /* | |
691 | * Maybe this should be above the vnode op call, but so long as | |
692 | * file servers have no limits, i don't think it matters | |
693 | */ | |
694 | if (vp->v_type == VREG && | |
695 | uio->uio_offset + uio->uio_resid > | |
696 | u.u_rlimit[RLIMIT_FSIZE].rlim_cur) { | |
697 | psignal(u.u_procp, SIGXFSZ); | |
698 | return (EFBIG); | |
699 | } | |
700 | resid = uio->uio_resid; | |
701 | osize = ip->i_size; | |
702 | fs = ip->i_fs; | |
e16fa59e KM |
703 | flags = 0; |
704 | if (ioflag & IO_SYNC) | |
705 | flags = B_SYNC; | |
b373e060 KM |
706 | do { |
707 | lbn = lblkno(fs, uio->uio_offset); | |
708 | on = blkoff(fs, uio->uio_offset); | |
709 | n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid); | |
710 | if (n < fs->fs_bsize) | |
e16fa59e | 711 | flags |= B_CLRBUF; |
b373e060 | 712 | else |
e16fa59e KM |
713 | flags &= ~B_CLRBUF; |
714 | if (error = balloc(ip, lbn, (int)(on + n), &bp, flags)) | |
b373e060 | 715 | break; |
e16fa59e | 716 | bn = bp->b_blkno; |
8986c97c | 717 | if (uio->uio_offset + n > ip->i_size) { |
b373e060 | 718 | ip->i_size = uio->uio_offset + n; |
8986c97c KM |
719 | vnode_pager_setsize(vp, ip->i_size); |
720 | } | |
b373e060 | 721 | size = blksize(fs, ip, lbn); |
8986c97c | 722 | (void) vnode_pager_uncache(vp); |
b373e060 | 723 | n = MIN(n, size - bp->b_resid); |
b373e060 KM |
724 | error = uiomove(bp->b_un.b_addr + on, n, uio); |
725 | if (ioflag & IO_SYNC) | |
726 | (void) bwrite(bp); | |
727 | else if (n + on == fs->fs_bsize) { | |
728 | bp->b_flags |= B_AGE; | |
729 | bawrite(bp); | |
730 | } else | |
731 | bdwrite(bp); | |
732 | ip->i_flag |= IUPD|ICHG; | |
733 | if (cred->cr_uid != 0) | |
734 | ip->i_mode &= ~(ISUID|ISGID); | |
735 | } while (error == 0 && uio->uio_resid > 0 && n != 0); | |
736 | if (error && (ioflag & IO_UNIT)) { | |
e16fa59e | 737 | (void) itrunc(ip, osize, ioflag & IO_SYNC); |
b373e060 KM |
738 | uio->uio_offset -= resid - uio->uio_resid; |
739 | uio->uio_resid = resid; | |
740 | } | |
1c05ecaf KM |
741 | if (!error && (ioflag & IO_SYNC)) |
742 | error = iupdat(ip, &time, &time, 1); | |
b373e060 KM |
743 | return (error); |
744 | } | |
745 | ||
7188ac27 KM |
746 | /* ARGSUSED */ |
747 | ufs_ioctl(vp, com, data, fflag, cred) | |
748 | struct vnode *vp; | |
749 | int com; | |
750 | caddr_t data; | |
751 | int fflag; | |
752 | struct ucred *cred; | |
bb1b75f4 | 753 | { |
bb1b75f4 | 754 | |
7188ac27 KM |
755 | return (ENOTTY); |
756 | } | |
757 | ||
758 | /* ARGSUSED */ | |
d1c43d7f | 759 | ufs_select(vp, which, fflags, cred) |
7188ac27 | 760 | struct vnode *vp; |
d1c43d7f | 761 | int which, fflags; |
7188ac27 KM |
762 | struct ucred *cred; |
763 | { | |
764 | ||
7188ac27 | 765 | return (1); /* XXX */ |
bb1b75f4 | 766 | } |
d67a03eb | 767 | |
4f083fd7 | 768 | /* |
7188ac27 KM |
769 | * Mmap a file |
770 | * | |
771 | * NB Currently unsupported. | |
4f083fd7 | 772 | */ |
7188ac27 KM |
773 | /* ARGSUSED */ |
774 | ufs_mmap(vp, fflags, cred) | |
775 | struct vnode *vp; | |
776 | int fflags; | |
777 | struct ucred *cred; | |
d67a03eb | 778 | { |
d67a03eb | 779 | |
7188ac27 | 780 | return (EINVAL); |
d67a03eb | 781 | } |
64d3a787 | 782 | |
4f083fd7 | 783 | /* |
7188ac27 | 784 | * Synch an open file. |
4f083fd7 | 785 | */ |
7188ac27 | 786 | /* ARGSUSED */ |
86cdabf6 | 787 | ufs_fsync(vp, fflags, cred, waitfor) |
7188ac27 KM |
788 | struct vnode *vp; |
789 | int fflags; | |
790 | struct ucred *cred; | |
86cdabf6 | 791 | int waitfor; |
528f664c | 792 | { |
86cdabf6 | 793 | struct inode *ip = VTOI(vp); |
7188ac27 | 794 | |
7188ac27 KM |
795 | if (fflags&FWRITE) |
796 | ip->i_flag |= ICHG; | |
e16fa59e KM |
797 | vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); |
798 | return (iupdat(ip, &time, &time, waitfor == MNT_WAIT)); | |
528f664c SL |
799 | } |
800 | ||
4f083fd7 | 801 | /* |
7188ac27 KM |
802 | * Seek on a file |
803 | * | |
804 | * Nothing to do, so just return. | |
4f083fd7 | 805 | */ |
7188ac27 KM |
806 | /* ARGSUSED */ |
807 | ufs_seek(vp, oldoff, newoff, cred) | |
808 | struct vnode *vp; | |
809 | off_t oldoff, newoff; | |
810 | struct ucred *cred; | |
528f664c | 811 | { |
7188ac27 KM |
812 | |
813 | return (0); | |
814 | } | |
815 | ||
816 | /* | |
817 | * ufs remove | |
818 | * Hard to avoid races here, especially | |
819 | * in unlinking directories. | |
820 | */ | |
821 | ufs_remove(ndp) | |
822 | struct nameidata *ndp; | |
823 | { | |
824 | register struct inode *ip, *dp; | |
825 | int error; | |
826 | ||
827 | ip = VTOI(ndp->ni_vp); | |
828 | dp = VTOI(ndp->ni_dvp); | |
829 | error = dirremove(ndp); | |
830 | if (!error) { | |
831 | ip->i_nlink--; | |
832 | ip->i_flag |= ICHG; | |
528f664c | 833 | } |
7188ac27 KM |
834 | if (dp == ip) |
835 | vrele(ITOV(ip)); | |
836 | else | |
837 | iput(ip); | |
838 | iput(dp); | |
839 | return (error); | |
4f083fd7 SL |
840 | } |
841 | ||
842 | /* | |
7188ac27 | 843 | * link vnode call |
4f083fd7 | 844 | */ |
7188ac27 KM |
845 | ufs_link(vp, ndp) |
846 | register struct vnode *vp; | |
847 | register struct nameidata *ndp; | |
4f083fd7 | 848 | { |
7188ac27 KM |
849 | register struct inode *ip = VTOI(vp); |
850 | int error; | |
4f083fd7 | 851 | |
7188ac27 KM |
852 | if (ndp->ni_dvp != vp) |
853 | ILOCK(ip); | |
854 | if (ip->i_nlink == LINK_MAX - 1) { | |
855 | error = EMLINK; | |
856 | goto out; | |
857 | } | |
858 | ip->i_nlink++; | |
859 | ip->i_flag |= ICHG; | |
860 | error = iupdat(ip, &time, &time, 1); | |
861 | if (!error) | |
862 | error = direnter(ip, ndp); | |
863 | out: | |
864 | if (ndp->ni_dvp != vp) | |
865 | IUNLOCK(ip); | |
866 | if (error) { | |
867 | ip->i_nlink--; | |
82252d2b | 868 | ip->i_flag |= ICHG; |
7188ac27 KM |
869 | } |
870 | return (error); | |
528f664c SL |
871 | } |
872 | ||
4f083fd7 SL |
873 | /* |
874 | * Rename system call. | |
875 | * rename("foo", "bar"); | |
876 | * is essentially | |
877 | * unlink("bar"); | |
878 | * link("foo", "bar"); | |
879 | * unlink("foo"); | |
880 | * but ``atomically''. Can't do full commit without saving state in the | |
881 | * inode on disk which isn't feasible at this time. Best we can do is | |
882 | * always guarantee the target exists. | |
883 | * | |
884 | * Basic algorithm is: | |
885 | * | |
886 | * 1) Bump link count on source while we're linking it to the | |
7188ac27 | 887 | * target. This also ensure the inode won't be deleted out |
68f21562 KM |
888 | * from underneath us while we work (it may be truncated by |
889 | * a concurrent `trunc' or `open' for creation). | |
4f083fd7 SL |
890 | * 2) Link source to destination. If destination already exists, |
891 | * delete it first. | |
68f21562 KM |
892 | * 3) Unlink source reference to inode if still around. If a |
893 | * directory was moved and the parent of the destination | |
4f083fd7 SL |
894 | * is different from the source, patch the ".." entry in the |
895 | * directory. | |
4f083fd7 | 896 | */ |
7188ac27 KM |
897 | ufs_rename(fndp, tndp) |
898 | register struct nameidata *fndp, *tndp; | |
528f664c | 899 | { |
4f083fd7 | 900 | register struct inode *ip, *xp, *dp; |
68f21562 KM |
901 | struct dirtemplate dirbuf; |
902 | int doingdirectory = 0, oldparent = 0, newparent = 0; | |
a5390dce | 903 | int error = 0; |
4f083fd7 | 904 | |
7188ac27 KM |
905 | dp = VTOI(fndp->ni_dvp); |
906 | ip = VTOI(fndp->ni_vp); | |
907 | ILOCK(ip); | |
4f083fd7 | 908 | if ((ip->i_mode&IFMT) == IFDIR) { |
7188ac27 | 909 | register struct direct *d = &fndp->ni_dent; |
4f083fd7 | 910 | |
4f083fd7 | 911 | /* |
046f18d1 | 912 | * Avoid ".", "..", and aliases of "." for obvious reasons. |
4f083fd7 | 913 | */ |
7188ac27 KM |
914 | if ((d->d_namlen == 1 && d->d_name[0] == '.') || dp == ip || |
915 | fndp->ni_isdotdot || (ip->i_flag & IRENAME)) { | |
66955caf KM |
916 | VOP_ABORTOP(tndp); |
917 | vput(tndp->ni_dvp); | |
918 | if (tndp->ni_vp) | |
919 | vput(tndp->ni_vp); | |
920 | VOP_ABORTOP(fndp); | |
921 | vrele(fndp->ni_dvp); | |
922 | vput(fndp->ni_vp); | |
7188ac27 | 923 | return (EINVAL); |
4f083fd7 | 924 | } |
68f21562 | 925 | ip->i_flag |= IRENAME; |
4f083fd7 SL |
926 | oldparent = dp->i_number; |
927 | doingdirectory++; | |
928 | } | |
7188ac27 | 929 | vrele(fndp->ni_dvp); |
4f083fd7 SL |
930 | |
931 | /* | |
932 | * 1) Bump link count while we're moving stuff | |
933 | * around. If we crash somewhere before | |
934 | * completing our work, the link count | |
935 | * may be wrong, but correctable. | |
936 | */ | |
937 | ip->i_nlink++; | |
938 | ip->i_flag |= ICHG; | |
7188ac27 | 939 | error = iupdat(ip, &time, &time, 1); |
a388503d | 940 | IUNLOCK(ip); |
4f083fd7 SL |
941 | |
942 | /* | |
943 | * When the target exists, both the directory | |
7188ac27 | 944 | * and target vnodes are returned locked. |
4f083fd7 | 945 | */ |
7188ac27 KM |
946 | dp = VTOI(tndp->ni_dvp); |
947 | xp = NULL; | |
948 | if (tndp->ni_vp) | |
949 | xp = VTOI(tndp->ni_vp); | |
046f18d1 SL |
950 | /* |
951 | * If ".." must be changed (ie the directory gets a new | |
81552f0f KM |
952 | * parent) then the source directory must not be in the |
953 | * directory heirarchy above the target, as this would | |
954 | * orphan everything below the source directory. Also | |
955 | * the user must have write permission in the source so | |
956 | * as to be able to change "..". We must repeat the call | |
957 | * to namei, as the parent directory is unlocked by the | |
958 | * call to checkpath(). | |
046f18d1 | 959 | */ |
68f21562 KM |
960 | if (oldparent != dp->i_number) |
961 | newparent = dp->i_number; | |
962 | if (doingdirectory && newparent) { | |
48c3b6e8 KM |
963 | VOP_LOCK(fndp->ni_vp); |
964 | error = ufs_access(fndp->ni_vp, VWRITE, tndp->ni_cred); | |
965 | VOP_UNLOCK(fndp->ni_vp); | |
966 | if (error) | |
81552f0f | 967 | goto bad; |
7188ac27 | 968 | tndp->ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE; |
81552f0f | 969 | do { |
7188ac27 | 970 | dp = VTOI(tndp->ni_dvp); |
81552f0f | 971 | if (xp != NULL) |
79cf21e2 | 972 | iput(xp); |
7188ac27 | 973 | if (error = checkpath(ip, dp, tndp->ni_cred)) |
81552f0f | 974 | goto out; |
7188ac27 | 975 | if (error = namei(tndp)) |
81552f0f | 976 | goto out; |
7188ac27 KM |
977 | xp = NULL; |
978 | if (tndp->ni_vp) | |
979 | xp = VTOI(tndp->ni_vp); | |
980 | } while (dp != VTOI(tndp->ni_dvp)); | |
81552f0f | 981 | } |
4f083fd7 SL |
982 | /* |
983 | * 2) If target doesn't exist, link the target | |
984 | * to the source and unlink the source. | |
985 | * Otherwise, rewrite the target directory | |
986 | * entry to reference the source inode and | |
987 | * expunge the original entry's existence. | |
988 | */ | |
4f083fd7 | 989 | if (xp == NULL) { |
7188ac27 KM |
990 | if (dp->i_dev != ip->i_dev) |
991 | panic("rename: EXDEV"); | |
4f083fd7 | 992 | /* |
68f21562 KM |
993 | * Account for ".." in new directory. |
994 | * When source and destination have the same | |
995 | * parent we don't fool with the link count. | |
4f083fd7 | 996 | */ |
68f21562 | 997 | if (doingdirectory && newparent) { |
4f083fd7 SL |
998 | dp->i_nlink++; |
999 | dp->i_flag |= ICHG; | |
7188ac27 | 1000 | error = iupdat(dp, &time, &time, 1); |
4f083fd7 | 1001 | } |
7188ac27 | 1002 | if (error = direnter(ip, tndp)) |
4f083fd7 SL |
1003 | goto out; |
1004 | } else { | |
7188ac27 KM |
1005 | if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) |
1006 | panic("rename: EXDEV"); | |
e69c3c9c SL |
1007 | /* |
1008 | * Short circuit rename(foo, foo). | |
1009 | */ | |
1010 | if (xp->i_number == ip->i_number) | |
7188ac27 | 1011 | panic("rename: same file"); |
80cee150 JB |
1012 | /* |
1013 | * If the parent directory is "sticky", then the user must | |
1014 | * own the parent directory, or the destination of the rename, | |
1015 | * otherwise the destination may not be changed (except by | |
1016 | * root). This implements append-only directories. | |
1017 | */ | |
7188ac27 KM |
1018 | if ((dp->i_mode & ISVTX) && tndp->ni_cred->cr_uid != 0 && |
1019 | tndp->ni_cred->cr_uid != dp->i_uid && | |
1020 | xp->i_uid != tndp->ni_cred->cr_uid) { | |
80cee150 JB |
1021 | error = EPERM; |
1022 | goto bad; | |
1023 | } | |
4f083fd7 | 1024 | /* |
a5390dce SL |
1025 | * Target must be empty if a directory |
1026 | * and have no links to it. | |
4f083fd7 SL |
1027 | * Also, insure source and target are |
1028 | * compatible (both directories, or both | |
1029 | * not directories). | |
1030 | */ | |
1031 | if ((xp->i_mode&IFMT) == IFDIR) { | |
7188ac27 KM |
1032 | if (!dirempty(xp, dp->i_number, tndp->ni_cred) || |
1033 | xp->i_nlink > 2) { | |
a5390dce | 1034 | error = ENOTEMPTY; |
4f083fd7 SL |
1035 | goto bad; |
1036 | } | |
1037 | if (!doingdirectory) { | |
a5390dce | 1038 | error = ENOTDIR; |
4f083fd7 SL |
1039 | goto bad; |
1040 | } | |
7188ac27 | 1041 | cache_purge(ITOV(dp)); |
4f083fd7 | 1042 | } else if (doingdirectory) { |
a5390dce | 1043 | error = EISDIR; |
4f083fd7 SL |
1044 | goto bad; |
1045 | } | |
7188ac27 KM |
1046 | if (error = dirrewrite(dp, ip, tndp)) |
1047 | goto bad; | |
a62786b9 KM |
1048 | /* |
1049 | * If the target directory is in the same | |
1050 | * directory as the source directory, | |
1051 | * decrement the link count on the parent | |
1052 | * of the target directory. | |
1053 | */ | |
1054 | if (doingdirectory && !newparent) { | |
1055 | dp->i_nlink--; | |
1056 | dp->i_flag |= ICHG; | |
1057 | } | |
7188ac27 | 1058 | vput(ITOV(dp)); |
4f083fd7 | 1059 | /* |
a5390dce SL |
1060 | * Adjust the link count of the target to |
1061 | * reflect the dirrewrite above. If this is | |
1062 | * a directory it is empty and there are | |
1063 | * no links to it, so we can squash the inode and | |
1064 | * any space associated with it. We disallowed | |
1065 | * renaming over top of a directory with links to | |
68f21562 KM |
1066 | * it above, as the remaining link would point to |
1067 | * a directory without "." or ".." entries. | |
4f083fd7 | 1068 | */ |
a5390dce | 1069 | xp->i_nlink--; |
4f083fd7 | 1070 | if (doingdirectory) { |
a5390dce SL |
1071 | if (--xp->i_nlink != 0) |
1072 | panic("rename: linked directory"); | |
e16fa59e | 1073 | error = itrunc(xp, (u_long)0, IO_SYNC); |
a5390dce | 1074 | } |
4f083fd7 | 1075 | xp->i_flag |= ICHG; |
88d931ba | 1076 | iput(xp); |
31db12cb | 1077 | xp = NULL; |
4f083fd7 SL |
1078 | } |
1079 | ||
1080 | /* | |
1081 | * 3) Unlink the source. | |
1082 | */ | |
7188ac27 KM |
1083 | fndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; |
1084 | (void)namei(fndp); | |
1085 | if (fndp->ni_vp != NULL) { | |
1086 | xp = VTOI(fndp->ni_vp); | |
1087 | dp = VTOI(fndp->ni_dvp); | |
1088 | } else { | |
d9d75b8f KM |
1089 | /* |
1090 | * From name has disappeared. | |
1091 | */ | |
1092 | if (doingdirectory) | |
1093 | panic("rename: lost dir entry"); | |
1094 | vrele(ITOV(ip)); | |
1095 | return (0); | |
7188ac27 | 1096 | } |
4f083fd7 | 1097 | /* |
7188ac27 | 1098 | * Ensure that the directory entry still exists and has not |
68f21562 KM |
1099 | * changed while the new name has been entered. If the source is |
1100 | * a file then the entry may have been unlinked or renamed. In | |
1101 | * either case there is no further work to be done. If the source | |
1102 | * is a directory then it cannot have been rmdir'ed; its link | |
1103 | * count of three would cause a rmdir to fail with ENOTEMPTY. | |
7188ac27 | 1104 | * The IRENAME flag ensures that it cannot be moved by another |
68f21562 | 1105 | * rename. |
4f083fd7 | 1106 | */ |
4f1a9037 | 1107 | if (xp != ip) { |
68f21562 | 1108 | if (doingdirectory) |
4f1a9037 | 1109 | panic("rename: lost dir entry"); |
68f21562 | 1110 | } else { |
4f083fd7 | 1111 | /* |
68f21562 KM |
1112 | * If the source is a directory with a |
1113 | * new parent, the link count of the old | |
1114 | * parent directory must be decremented | |
1115 | * and ".." set to point to the new parent. | |
4f083fd7 | 1116 | */ |
68f21562 | 1117 | if (doingdirectory && newparent) { |
4f083fd7 SL |
1118 | dp->i_nlink--; |
1119 | dp->i_flag |= ICHG; | |
86cdabf6 | 1120 | error = vn_rdwr(UIO_READ, ITOV(xp), (caddr_t)&dirbuf, |
7188ac27 | 1121 | sizeof (struct dirtemplate), (off_t)0, |
86cdabf6 KM |
1122 | UIO_SYSSPACE, IO_NODELOCKED, |
1123 | tndp->ni_cred, (int *)0); | |
68f21562 KM |
1124 | if (error == 0) { |
1125 | if (dirbuf.dotdot_namlen != 2 || | |
1126 | dirbuf.dotdot_name[0] != '.' || | |
1127 | dirbuf.dotdot_name[1] != '.') { | |
8ad54d9e | 1128 | dirbad(xp, 12, "rename: mangled dir"); |
68f21562 KM |
1129 | } else { |
1130 | dirbuf.dotdot_ino = newparent; | |
86cdabf6 | 1131 | (void) vn_rdwr(UIO_WRITE, ITOV(xp), |
68f21562 KM |
1132 | (caddr_t)&dirbuf, |
1133 | sizeof (struct dirtemplate), | |
93e273b9 | 1134 | (off_t)0, UIO_SYSSPACE, |
86cdabf6 | 1135 | IO_NODELOCKED|IO_SYNC, |
7188ac27 KM |
1136 | tndp->ni_cred, (int *)0); |
1137 | cache_purge(ITOV(dp)); | |
68f21562 KM |
1138 | } |
1139 | } | |
4f083fd7 | 1140 | } |
7188ac27 KM |
1141 | error = dirremove(fndp); |
1142 | if (!error) { | |
68f21562 KM |
1143 | xp->i_nlink--; |
1144 | xp->i_flag |= ICHG; | |
4f083fd7 | 1145 | } |
68f21562 | 1146 | xp->i_flag &= ~IRENAME; |
4f083fd7 | 1147 | } |
4f083fd7 | 1148 | if (dp) |
7188ac27 | 1149 | vput(ITOV(dp)); |
68f21562 | 1150 | if (xp) |
7188ac27 KM |
1151 | vput(ITOV(xp)); |
1152 | vrele(ITOV(ip)); | |
1153 | return (error); | |
a5390dce | 1154 | |
4f083fd7 | 1155 | bad: |
4f083fd7 | 1156 | if (xp) |
7188ac27 KM |
1157 | vput(ITOV(xp)); |
1158 | vput(ITOV(dp)); | |
4f083fd7 SL |
1159 | out: |
1160 | ip->i_nlink--; | |
1161 | ip->i_flag |= ICHG; | |
7188ac27 KM |
1162 | vrele(ITOV(ip)); |
1163 | return (error); | |
64d3a787 | 1164 | } |
88a7a62a SL |
1165 | |
1166 | /* | |
1167 | * A virgin directory (no blushing please). | |
1168 | */ | |
1169 | struct dirtemplate mastertemplate = { | |
1170 | 0, 12, 1, ".", | |
1171 | 0, DIRBLKSIZ - 12, 2, ".." | |
1172 | }; | |
1173 | ||
1174 | /* | |
1175 | * Mkdir system call | |
1176 | */ | |
7188ac27 KM |
1177 | ufs_mkdir(ndp, vap) |
1178 | struct nameidata *ndp; | |
1179 | struct vattr *vap; | |
88a7a62a | 1180 | { |
88a7a62a | 1181 | register struct inode *ip, *dp; |
7188ac27 KM |
1182 | struct inode *tip; |
1183 | struct vnode *dvp; | |
88a7a62a | 1184 | struct dirtemplate dirtemplate; |
7188ac27 KM |
1185 | int error; |
1186 | int dmode; | |
1187 | ||
1188 | dvp = ndp->ni_dvp; | |
1189 | dp = VTOI(dvp); | |
1190 | dmode = vap->va_mode&0777; | |
1191 | dmode |= IFDIR; | |
88a7a62a SL |
1192 | /* |
1193 | * Must simulate part of maknode here | |
1194 | * in order to acquire the inode, but | |
1195 | * not have it entered in the parent | |
1196 | * directory. The entry is made later | |
1197 | * after writing "." and ".." entries out. | |
1198 | */ | |
4b61628b | 1199 | if (error = ialloc(dp, dirpref(dp->i_fs), dmode, ndp->ni_cred, &tip)) { |
88a7a62a | 1200 | iput(dp); |
7188ac27 | 1201 | return (error); |
88a7a62a | 1202 | } |
7188ac27 | 1203 | ip = tip; |
4b61628b KM |
1204 | ip->i_uid = ndp->ni_cred->cr_uid; |
1205 | ip->i_gid = dp->i_gid; | |
88a7a62a | 1206 | #ifdef QUOTA |
4b61628b KM |
1207 | if ((error = getinoquota(ip)) || |
1208 | (error = chkiq(ip, 1, ndp->ni_cred, 0))) { | |
1209 | ifree(ip, ip->i_number, dmode); | |
1210 | iput(ip); | |
1211 | iput(dp); | |
1212 | return (error); | |
1213 | } | |
88a7a62a SL |
1214 | #endif |
1215 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
1216 | ip->i_mode = dmode; |
1217 | ITOV(ip)->v_type = VDIR; /* Rest init'd in iget() */ | |
88a7a62a | 1218 | ip->i_nlink = 2; |
7188ac27 | 1219 | error = iupdat(ip, &time, &time, 1); |
88a7a62a SL |
1220 | |
1221 | /* | |
1222 | * Bump link count in parent directory | |
1223 | * to reflect work done below. Should | |
1224 | * be done before reference is created | |
1225 | * so reparation is possible if we crash. | |
1226 | */ | |
1227 | dp->i_nlink++; | |
1228 | dp->i_flag |= ICHG; | |
7188ac27 | 1229 | error = iupdat(dp, &time, &time, 1); |
88a7a62a SL |
1230 | |
1231 | /* | |
1232 | * Initialize directory with "." | |
1233 | * and ".." from static template. | |
1234 | */ | |
1235 | dirtemplate = mastertemplate; | |
1236 | dirtemplate.dot_ino = ip->i_number; | |
1237 | dirtemplate.dotdot_ino = dp->i_number; | |
86cdabf6 | 1238 | error = vn_rdwr(UIO_WRITE, ITOV(ip), (caddr_t)&dirtemplate, |
7188ac27 | 1239 | sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, |
86cdabf6 | 1240 | IO_NODELOCKED|IO_SYNC, ndp->ni_cred, (int *)0); |
7188ac27 | 1241 | if (error) { |
88a7a62a SL |
1242 | dp->i_nlink--; |
1243 | dp->i_flag |= ICHG; | |
1244 | goto bad; | |
1245 | } | |
15365e07 | 1246 | if (DIRBLKSIZ > dp->i_fs->fs_fsize) { |
7188ac27 | 1247 | panic("mkdir: blksize"); /* XXX - should grow w/balloc() */ |
15365e07 | 1248 | } else { |
23de9f20 | 1249 | ip->i_size = DIRBLKSIZ; |
15365e07 KM |
1250 | ip->i_flag |= ICHG; |
1251 | } | |
88a7a62a SL |
1252 | /* |
1253 | * Directory all set up, now | |
1254 | * install the entry for it in | |
1255 | * the parent directory. | |
1256 | */ | |
7188ac27 | 1257 | error = direnter(ip, ndp); |
88a7a62a | 1258 | dp = NULL; |
7188ac27 | 1259 | if (error) { |
715baff1 | 1260 | ndp->ni_nameiop = LOOKUP | NOCACHE; |
7188ac27 KM |
1261 | error = namei(ndp); |
1262 | if (!error) { | |
1263 | dp = VTOI(ndp->ni_vp); | |
88a7a62a SL |
1264 | dp->i_nlink--; |
1265 | dp->i_flag |= ICHG; | |
1266 | } | |
1267 | } | |
1268 | bad: | |
1269 | /* | |
1270 | * No need to do an explicit itrunc here, | |
7188ac27 | 1271 | * vrele will do this for us because we set |
88a7a62a SL |
1272 | * the link count to 0. |
1273 | */ | |
7188ac27 | 1274 | if (error) { |
88a7a62a SL |
1275 | ip->i_nlink = 0; |
1276 | ip->i_flag |= ICHG; | |
cbcdacd6 KM |
1277 | iput(ip); |
1278 | } else | |
1279 | ndp->ni_vp = ITOV(ip); | |
88a7a62a SL |
1280 | if (dp) |
1281 | iput(dp); | |
7188ac27 | 1282 | return (error); |
88a7a62a SL |
1283 | } |
1284 | ||
1285 | /* | |
1286 | * Rmdir system call. | |
1287 | */ | |
7188ac27 KM |
1288 | ufs_rmdir(ndp) |
1289 | register struct nameidata *ndp; | |
88a7a62a | 1290 | { |
88a7a62a | 1291 | register struct inode *ip, *dp; |
7188ac27 KM |
1292 | int error = 0; |
1293 | ||
1294 | ip = VTOI(ndp->ni_vp); | |
1295 | dp = VTOI(ndp->ni_dvp); | |
88a7a62a SL |
1296 | /* |
1297 | * No rmdir "." please. | |
1298 | */ | |
1299 | if (dp == ip) { | |
7188ac27 | 1300 | vrele(ITOV(dp)); |
88a7a62a | 1301 | iput(ip); |
7188ac27 | 1302 | return (EINVAL); |
88a7a62a SL |
1303 | } |
1304 | /* | |
1305 | * Verify the directory is empty (and valid). | |
1306 | * (Rmdir ".." won't be valid since | |
1307 | * ".." will contain a reference to | |
1308 | * the current directory and thus be | |
1309 | * non-empty.) | |
1310 | */ | |
7188ac27 KM |
1311 | if (ip->i_nlink != 2 || !dirempty(ip, dp->i_number, ndp->ni_cred)) { |
1312 | error = ENOTEMPTY; | |
88a7a62a SL |
1313 | goto out; |
1314 | } | |
1315 | /* | |
1316 | * Delete reference to directory before purging | |
1317 | * inode. If we crash in between, the directory | |
1318 | * will be reattached to lost+found, | |
1319 | */ | |
7188ac27 | 1320 | if (error = dirremove(ndp)) |
88a7a62a SL |
1321 | goto out; |
1322 | dp->i_nlink--; | |
1323 | dp->i_flag |= ICHG; | |
7188ac27 | 1324 | cache_purge(ITOV(dp)); |
88a7a62a | 1325 | iput(dp); |
7188ac27 | 1326 | ndp->ni_dvp = NULL; |
88a7a62a SL |
1327 | /* |
1328 | * Truncate inode. The only stuff left | |
1329 | * in the directory is "." and "..". The | |
1330 | * "." reference is inconsequential since | |
1331 | * we're quashing it. The ".." reference | |
1332 | * has already been adjusted above. We've | |
1333 | * removed the "." reference and the reference | |
1334 | * in the parent directory, but there may be | |
1335 | * other hard links so decrement by 2 and | |
1336 | * worry about them later. | |
1337 | */ | |
1338 | ip->i_nlink -= 2; | |
e16fa59e | 1339 | error = itrunc(ip, (u_long)0, IO_SYNC); |
7188ac27 | 1340 | cache_purge(ITOV(ip)); |
88a7a62a | 1341 | out: |
7188ac27 | 1342 | if (ndp->ni_dvp) |
88a7a62a SL |
1343 | iput(dp); |
1344 | iput(ip); | |
7188ac27 | 1345 | return (error); |
88a7a62a SL |
1346 | } |
1347 | ||
7188ac27 KM |
1348 | /* |
1349 | * symlink -- make a symbolic link | |
1350 | */ | |
1351 | ufs_symlink(ndp, vap, target) | |
1352 | struct nameidata *ndp; | |
1353 | struct vattr *vap; | |
1354 | char *target; | |
1355 | { | |
1356 | struct inode *ip; | |
1357 | int error; | |
1358 | ||
1359 | error = maknode(IFLNK | vap->va_mode, ndp, &ip); | |
1360 | if (error) | |
1361 | return (error); | |
86cdabf6 KM |
1362 | error = vn_rdwr(UIO_WRITE, ITOV(ip), target, strlen(target), (off_t)0, |
1363 | UIO_SYSSPACE, IO_NODELOCKED, ndp->ni_cred, (int *)0); | |
7188ac27 KM |
1364 | iput(ip); |
1365 | return (error); | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * Vnode op for read and write | |
1370 | */ | |
930730fd | 1371 | ufs_readdir(vp, uio, cred, eofflagp) |
7188ac27 KM |
1372 | struct vnode *vp; |
1373 | register struct uio *uio; | |
7188ac27 | 1374 | struct ucred *cred; |
930730fd | 1375 | int *eofflagp; |
88a7a62a | 1376 | { |
86cdabf6 | 1377 | int count, lost, error; |
88a7a62a | 1378 | |
7188ac27 KM |
1379 | count = uio->uio_resid; |
1380 | count &= ~(DIRBLKSIZ - 1); | |
86cdabf6 KM |
1381 | lost = uio->uio_resid - count; |
1382 | if (count < DIRBLKSIZ || (uio->uio_offset & (DIRBLKSIZ -1))) | |
7188ac27 | 1383 | return (EINVAL); |
7188ac27 KM |
1384 | uio->uio_resid = count; |
1385 | uio->uio_iov->iov_len = count; | |
86cdabf6 KM |
1386 | error = ufs_read(vp, uio, 0, cred); |
1387 | uio->uio_resid += lost; | |
930730fd KM |
1388 | if ((VTOI(vp)->i_size - uio->uio_offset) <= 0) |
1389 | *eofflagp = 1; | |
1390 | else | |
1391 | *eofflagp = 0; | |
7188ac27 KM |
1392 | return (error); |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Return target name of a symbolic link | |
1397 | */ | |
1398 | ufs_readlink(vp, uiop, cred) | |
1399 | struct vnode *vp; | |
1400 | struct uio *uiop; | |
1401 | struct ucred *cred; | |
1402 | { | |
1403 | ||
86cdabf6 | 1404 | return (ufs_read(vp, uiop, 0, cred)); |
7188ac27 KM |
1405 | } |
1406 | ||
1407 | /* | |
1408 | * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually | |
66955caf | 1409 | * done. Nothing to do at the moment. |
7188ac27 | 1410 | */ |
66955caf | 1411 | /* ARGSUSED */ |
7188ac27 | 1412 | ufs_abortop(ndp) |
66955caf | 1413 | struct nameidata *ndp; |
7188ac27 | 1414 | { |
7188ac27 | 1415 | |
66955caf | 1416 | return (0); |
7188ac27 KM |
1417 | } |
1418 | ||
1c3ebc10 KM |
1419 | /* |
1420 | * Lock an inode. | |
1421 | */ | |
7188ac27 KM |
1422 | ufs_lock(vp) |
1423 | struct vnode *vp; | |
1424 | { | |
1425 | register struct inode *ip = VTOI(vp); | |
1426 | ||
1427 | ILOCK(ip); | |
1428 | return (0); | |
1429 | } | |
1430 | ||
1c3ebc10 KM |
1431 | /* |
1432 | * Unlock an inode. | |
1433 | */ | |
7188ac27 KM |
1434 | ufs_unlock(vp) |
1435 | struct vnode *vp; | |
1436 | { | |
1437 | register struct inode *ip = VTOI(vp); | |
1438 | ||
1439 | if (!(ip->i_flag & ILOCKED)) | |
1440 | panic("ufs_unlock NOT LOCKED"); | |
1441 | IUNLOCK(ip); | |
1442 | return (0); | |
1443 | } | |
1444 | ||
1c3ebc10 KM |
1445 | /* |
1446 | * Check for a locked inode. | |
1447 | */ | |
1448 | ufs_islocked(vp) | |
1449 | struct vnode *vp; | |
1450 | { | |
1451 | ||
1452 | if (VTOI(vp)->i_flag & ILOCKED) | |
1453 | return (1); | |
1454 | return (0); | |
1455 | } | |
1456 | ||
7188ac27 KM |
1457 | /* |
1458 | * Get access to bmap | |
1459 | */ | |
1460 | ufs_bmap(vp, bn, vpp, bnp) | |
1461 | struct vnode *vp; | |
1462 | daddr_t bn; | |
1463 | struct vnode **vpp; | |
1464 | daddr_t *bnp; | |
1465 | { | |
1466 | struct inode *ip = VTOI(vp); | |
1467 | ||
1468 | if (vpp != NULL) | |
1469 | *vpp = ip->i_devvp; | |
1470 | if (bnp == NULL) | |
1471 | return (0); | |
4f1ff475 | 1472 | return (bmap(ip, bn, bnp)); |
88a7a62a SL |
1473 | } |
1474 | ||
1475 | /* | |
4f1ff475 KM |
1476 | * Calculate the logical to physical mapping if not done already, |
1477 | * then call the device strategy routine. | |
88a7a62a | 1478 | */ |
4f1ff475 | 1479 | int checkoverlap = 0; |
e16fa59e | 1480 | |
7188ac27 KM |
1481 | ufs_strategy(bp) |
1482 | register struct buf *bp; | |
88a7a62a | 1483 | { |
e16fa59e | 1484 | register struct inode *ip = VTOI(bp->b_vp); |
e16fa59e | 1485 | struct vnode *vp; |
e16fa59e KM |
1486 | int error; |
1487 | ||
1488 | if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) | |
1489 | panic("ufs_strategy: spec"); | |
1490 | if (bp->b_blkno == bp->b_lblkno) { | |
1491 | if (error = bmap(ip, bp->b_lblkno, &bp->b_blkno)) | |
1492 | return (error); | |
20aa076b | 1493 | if ((long)bp->b_blkno == -1) |
e16fa59e | 1494 | clrbuf(bp); |
e16fa59e | 1495 | } |
20aa076b KM |
1496 | if ((long)bp->b_blkno == -1) { |
1497 | biodone(bp); | |
e16fa59e | 1498 | return (0); |
20aa076b | 1499 | } |
4f1ff475 | 1500 | #ifdef DIAGNOSTIC |
e16fa59e | 1501 | if (checkoverlap) { |
4f1ff475 KM |
1502 | register struct buf *ep; |
1503 | struct buf *ebp; | |
1504 | daddr_t start, last; | |
1505 | ||
e16fa59e KM |
1506 | ebp = &buf[nbuf]; |
1507 | start = bp->b_blkno; | |
1508 | last = start + btodb(bp->b_bcount) - 1; | |
1509 | for (ep = buf; ep < ebp; ep++) { | |
1510 | if (ep == bp || (ep->b_flags & B_INVAL) || | |
fcd4f15a | 1511 | ep->b_vp == NULLVP) |
e16fa59e KM |
1512 | continue; |
1513 | if (VOP_BMAP(ep->b_vp, (daddr_t)0, &vp, (daddr_t)0)) | |
1514 | continue; | |
1515 | if (vp != ip->i_devvp) | |
1516 | continue; | |
1517 | /* look for overlap */ | |
1518 | if (ep->b_bcount == 0 || ep->b_blkno > last || | |
1519 | ep->b_blkno + btodb(ep->b_bcount) <= start) | |
1520 | continue; | |
20aa076b KM |
1521 | vprint("Disk overlap", vp); |
1522 | printf("\tstart %d, end %d overlap start %d, end %d\n", | |
1523 | start, last, ep->b_blkno, | |
1524 | ep->b_blkno + btodb(ep->b_bcount) - 1); | |
4f1ff475 | 1525 | panic("Disk buffer overlap"); |
e16fa59e KM |
1526 | } |
1527 | } | |
4f1ff475 | 1528 | #endif /* DIAGNOSTIC */ |
e16fa59e KM |
1529 | vp = ip->i_devvp; |
1530 | bp->b_dev = vp->v_rdev; | |
1531 | (*(vp->v_op->vn_strategy))(bp); | |
7188ac27 KM |
1532 | return (0); |
1533 | } | |
88a7a62a | 1534 | |
e16fa59e KM |
1535 | /* |
1536 | * Print out the contents of an inode. | |
1537 | */ | |
1538 | ufs_print(vp) | |
1539 | struct vnode *vp; | |
1540 | { | |
1541 | register struct inode *ip = VTOI(vp); | |
1542 | ||
a8f829ed KM |
1543 | printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number, |
1544 | major(ip->i_dev), minor(ip->i_dev)); | |
1545 | #ifdef FIFO | |
1546 | if (vp->v_type == VFIFO) | |
1547 | fifo_printinfo(vp); | |
1548 | #endif /* FIFO */ | |
1549 | printf("%s\n", (ip->i_flag & ILOCKED) ? " (LOCKED)" : ""); | |
96bae3e0 KM |
1550 | if (ip->i_spare0 == 0) |
1551 | return; | |
1552 | printf("\towner pid %d", ip->i_spare0); | |
1553 | if (ip->i_spare1) | |
1554 | printf(" waiting pid %d", ip->i_spare1); | |
1555 | printf("\n"); | |
e16fa59e KM |
1556 | } |
1557 | ||
24a31b70 KM |
1558 | /* |
1559 | * Read wrapper for special devices. | |
1560 | */ | |
1561 | ufsspec_read(vp, uio, ioflag, cred) | |
1562 | struct vnode *vp; | |
1563 | struct uio *uio; | |
1564 | int ioflag; | |
1565 | struct ucred *cred; | |
1566 | { | |
1567 | ||
1568 | /* | |
1569 | * Set access flag. | |
1570 | */ | |
1571 | VTOI(vp)->i_flag |= IACC; | |
1572 | return (spec_read(vp, uio, ioflag, cred)); | |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * Write wrapper for special devices. | |
1577 | */ | |
1578 | ufsspec_write(vp, uio, ioflag, cred) | |
1579 | struct vnode *vp; | |
1580 | struct uio *uio; | |
1581 | int ioflag; | |
1582 | struct ucred *cred; | |
1583 | { | |
1584 | ||
1585 | /* | |
1586 | * Set update and change flags. | |
1587 | */ | |
1588 | VTOI(vp)->i_flag |= IUPD|ICHG; | |
1589 | return (spec_write(vp, uio, ioflag, cred)); | |
1590 | } | |
1591 | ||
1592 | /* | |
1593 | * Close wrapper for special devices. | |
1594 | * | |
1595 | * Update the times on the inode then do device close. | |
1596 | */ | |
1597 | ufsspec_close(vp, fflag, cred) | |
1598 | struct vnode *vp; | |
1599 | int fflag; | |
1600 | struct ucred *cred; | |
1601 | { | |
1602 | register struct inode *ip = VTOI(vp); | |
1603 | ||
de67eefc | 1604 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
24a31b70 KM |
1605 | ITIMES(ip, &time, &time); |
1606 | return (spec_close(vp, fflag, cred)); | |
1607 | } | |
1608 | ||
d1c43d7f KM |
1609 | #ifdef FIFO |
1610 | /* | |
1611 | * Read wrapper for fifo's | |
1612 | */ | |
1613 | ufsfifo_read(vp, uio, ioflag, cred) | |
1614 | struct vnode *vp; | |
1615 | struct uio *uio; | |
1616 | int ioflag; | |
1617 | struct ucred *cred; | |
1618 | { | |
1619 | ||
1620 | /* | |
1621 | * Set access flag. | |
1622 | */ | |
1623 | VTOI(vp)->i_flag |= IACC; | |
1624 | return (fifo_read(vp, uio, ioflag, cred)); | |
1625 | } | |
1626 | ||
1627 | /* | |
1628 | * Write wrapper for fifo's. | |
1629 | */ | |
1630 | ufsfifo_write(vp, uio, ioflag, cred) | |
1631 | struct vnode *vp; | |
1632 | struct uio *uio; | |
1633 | int ioflag; | |
1634 | struct ucred *cred; | |
1635 | { | |
1636 | ||
1637 | /* | |
1638 | * Set update and change flags. | |
1639 | */ | |
1640 | VTOI(vp)->i_flag |= IUPD|ICHG; | |
1641 | return (fifo_write(vp, uio, ioflag, cred)); | |
1642 | } | |
1643 | ||
1644 | /* | |
1645 | * Close wrapper for fifo's. | |
1646 | * | |
1647 | * Update the times on the inode then do device close. | |
1648 | */ | |
1649 | ufsfifo_close(vp, fflag, cred) | |
1650 | struct vnode *vp; | |
1651 | int fflag; | |
1652 | struct ucred *cred; | |
1653 | { | |
1654 | register struct inode *ip = VTOI(vp); | |
1655 | ||
1656 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) | |
1657 | ITIMES(ip, &time, &time); | |
1658 | return (fifo_close(vp, fflag, cred)); | |
1659 | } | |
1660 | #endif /* FIFO */ | |
1661 | ||
7188ac27 KM |
1662 | /* |
1663 | * Make a new file. | |
1664 | */ | |
1665 | maknode(mode, ndp, ipp) | |
1666 | int mode; | |
1667 | register struct nameidata *ndp; | |
1668 | struct inode **ipp; | |
1669 | { | |
1670 | register struct inode *ip; | |
1671 | struct inode *tip; | |
1672 | register struct inode *pdir = VTOI(ndp->ni_dvp); | |
1673 | ino_t ipref; | |
1674 | int error; | |
1675 | ||
1676 | *ipp = 0; | |
4b61628b KM |
1677 | if ((mode & IFMT) == 0) |
1678 | mode |= IFREG; | |
7188ac27 KM |
1679 | if ((mode & IFMT) == IFDIR) |
1680 | ipref = dirpref(pdir->i_fs); | |
1681 | else | |
1682 | ipref = pdir->i_number; | |
4b61628b | 1683 | if (error = ialloc(pdir, ipref, mode, ndp->ni_cred, &tip)) { |
7188ac27 KM |
1684 | iput(pdir); |
1685 | return (error); | |
1686 | } | |
1687 | ip = tip; | |
4b61628b KM |
1688 | ip->i_uid = ndp->ni_cred->cr_uid; |
1689 | ip->i_gid = pdir->i_gid; | |
7188ac27 | 1690 | #ifdef QUOTA |
4b61628b KM |
1691 | if ((error = getinoquota(ip)) || |
1692 | (error = chkiq(ip, 1, ndp->ni_cred, 0))) { | |
1693 | ifree(ip, ip->i_number, mode); | |
1694 | iput(ip); | |
1695 | iput(pdir); | |
1696 | return (error); | |
1697 | } | |
7188ac27 KM |
1698 | #endif |
1699 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
1700 | ip->i_mode = mode; |
1701 | ITOV(ip)->v_type = IFTOVT(mode); /* Rest init'd in iget() */ | |
1702 | ip->i_nlink = 1; | |
7188ac27 KM |
1703 | if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, ndp->ni_cred) && |
1704 | suser(ndp->ni_cred, NULL)) | |
1705 | ip->i_mode &= ~ISGID; | |
7188ac27 KM |
1706 | |
1707 | /* | |
1708 | * Make sure inode goes to disk before directory entry. | |
1709 | */ | |
4b61628b KM |
1710 | if (error = iupdat(ip, &time, &time, 1)) |
1711 | goto bad; | |
1712 | if (error = direnter(ip, ndp)) { | |
1713 | pdir = NULL; | |
1714 | goto bad; | |
7188ac27 KM |
1715 | } |
1716 | *ipp = ip; | |
1717 | return (0); | |
4b61628b KM |
1718 | |
1719 | bad: | |
1720 | /* | |
1721 | * Write error occurred trying to update the inode | |
1722 | * or the directory so must deallocate the inode. | |
1723 | */ | |
1724 | if (pdir) | |
1725 | iput(pdir); | |
1726 | ip->i_nlink = 0; | |
1727 | ip->i_flag |= ICHG; | |
1728 | iput(ip); | |
1729 | return (error); | |
88a7a62a | 1730 | } |
0b0bf936 KM |
1731 | |
1732 | /* | |
1733 | * Advisory record locking support | |
1734 | */ | |
1735 | ufs_advlock(vp, id, op, fl, flags) | |
1736 | struct vnode *vp; | |
1737 | caddr_t id; | |
1738 | int op; | |
1739 | register struct flock *fl; | |
1740 | int flags; | |
1741 | { | |
1742 | register struct inode *ip = VTOI(vp); | |
1743 | register struct lockf *lock; | |
1744 | off_t start, end; | |
1745 | int error; | |
1746 | ||
1747 | /* | |
1748 | * Avoid the common case of unlocking when inode has no locks. | |
1749 | */ | |
1750 | if (ip->i_lockf == (struct lockf *)0) { | |
1751 | if (op != F_SETLK) { | |
1752 | fl->l_type = F_UNLCK; | |
1753 | return (0); | |
1754 | } | |
1755 | } | |
1756 | /* | |
1757 | * Convert the flock structure into a start and end. | |
1758 | */ | |
1759 | switch (fl->l_whence) { | |
1760 | ||
1761 | case SEEK_SET: | |
1762 | case SEEK_CUR: | |
1763 | /* | |
1764 | * Caller is responsible for adding any necessary offset | |
1765 | * when SEEK_CUR is used. | |
1766 | */ | |
1767 | start = fl->l_start; | |
1768 | break; | |
1769 | ||
1770 | case SEEK_END: | |
1771 | start = ip->i_size + fl->l_start; | |
1772 | break; | |
1773 | ||
1774 | default: | |
1775 | return (EINVAL); | |
1776 | } | |
1777 | if (start < 0) | |
1778 | return (EINVAL); | |
1779 | if (fl->l_len == 0) | |
1780 | end = -1; | |
1781 | else | |
1782 | end = start + fl->l_len; | |
1783 | /* | |
1784 | * Create the lockf structure | |
1785 | */ | |
1786 | MALLOC(lock, struct lockf *, sizeof *lock, M_LOCKF, M_WAITOK); | |
1787 | lock->lf_start = start; | |
1788 | lock->lf_end = end; | |
1789 | lock->lf_id = id; | |
1790 | lock->lf_inode = ip; | |
1791 | lock->lf_type = fl->l_type; | |
1792 | lock->lf_next = (struct lockf *)0; | |
1793 | lock->lf_block = (struct lockf *)0; | |
1794 | lock->lf_flags = flags; | |
1795 | /* | |
1796 | * Do the requested operation. | |
1797 | */ | |
1798 | switch(op) { | |
1799 | case F_SETLK: | |
1800 | return (ufs_setlock(lock)); | |
1801 | ||
1802 | case F_UNLCK: | |
1803 | return (ufs_advunlock(lock)); | |
1804 | ||
1805 | case F_GETLK: | |
1806 | return (ufs_advgetlock(lock, fl)); | |
1807 | ||
1808 | default: | |
1809 | free(lock, M_LOCKF); | |
1810 | return (EINVAL); | |
1811 | } | |
1812 | /* NOTREACHED */ | |
1813 | } | |
1814 | ||
1815 | /* | |
1816 | * This variable controls the maximum number of processes that will | |
1817 | * be checked in doing deadlock detection. | |
1818 | */ | |
1819 | int maxlockdepth = MAXDEPTH; | |
1820 | ||
1821 | /* | |
1822 | * Set a byte-range lock. | |
1823 | */ | |
1824 | ufs_setlock(lock) | |
1825 | register struct lockf *lock; | |
1826 | { | |
1827 | register struct inode *ip = lock->lf_inode; | |
1828 | register struct lockf *block; | |
1829 | static char lockstr[] = "lockf"; | |
1830 | int priority, error; | |
1831 | ||
1832 | #ifdef LOCKF_DEBUG | |
1833 | if (lockf_debug & 4) | |
1834 | lf_print("ufs_setlock", lock); | |
1835 | #endif /* LOCKF_DEBUG */ | |
1836 | ||
1837 | /* | |
1838 | * Set the priority | |
1839 | */ | |
1840 | priority = PLOCK; | |
1841 | if ((lock->lf_type & F_WRLCK) == 0) | |
1842 | priority += 4; | |
1843 | priority |= PCATCH; | |
1844 | /* | |
1845 | * Scan lock list for this file looking for locks that would block us. | |
1846 | */ | |
1847 | while (block = lf_getblock(lock)) { | |
1848 | /* | |
1849 | * Free the structure and return if nonblocking. | |
1850 | */ | |
1851 | if ((lock->lf_flags & F_WAIT) == 0) { | |
1852 | free(lock, M_LOCKF); | |
1853 | return (EAGAIN); | |
1854 | } | |
1855 | /* | |
1856 | * We are blocked. Since flock style locks cover | |
1857 | * the whole file, there is no chance for deadlock. | |
1858 | * For byte-range locks we must check for deadlock. | |
1859 | * | |
1860 | * Deadlock detection is done by looking through the | |
1861 | * wait channels to see if there are any cycles that | |
1862 | * involve us. MAXDEPTH is set just to make sure we | |
1863 | * do not go off into neverland. | |
1864 | */ | |
1865 | if ((lock->lf_flags & F_POSIX) && | |
1866 | (block->lf_flags & F_POSIX)) { | |
1867 | register struct proc *wproc; | |
1868 | register struct lockf *waitblock; | |
1869 | int i = 0; | |
1870 | ||
1871 | /* The block is waiting on something */ | |
1872 | wproc = (struct proc *)block->lf_id; | |
1873 | while (wproc->p_wchan && | |
1874 | (wproc->p_wmesg == lockstr) && | |
1875 | (i++ < maxlockdepth)) { | |
1876 | waitblock = (struct lockf *)wproc->p_wchan; | |
1877 | /* Get the owner of the blocking lock */ | |
1878 | waitblock = waitblock->lf_next; | |
1879 | if ((waitblock->lf_flags & F_POSIX) == 0) | |
1880 | break; | |
1881 | wproc = (struct proc *)waitblock->lf_id; | |
1882 | if (wproc == (struct proc *)lock->lf_id) { | |
1883 | free(lock, M_LOCKF); | |
1884 | return (EDEADLK); | |
1885 | } | |
1886 | } | |
1887 | } | |
1888 | /* | |
1889 | * Add our lock to the blocked | |
1890 | * list and sleep until we're free. | |
1891 | */ | |
1892 | #ifdef LOCKF_DEBUG | |
1893 | if (lockf_debug & 4) | |
1894 | lf_print("ufs_advlock: blocking on", block); | |
1895 | #endif /* LOCKF_DEBUG */ | |
1896 | /* | |
1897 | * Remember who blocked us (for deadlock detection) | |
1898 | */ | |
1899 | lock->lf_next = block; | |
1900 | lf_addblock(block, lock); | |
1901 | if (error = tsleep((caddr_t *)lock, priority, lockstr, 0)) { | |
1902 | free(lock, M_LOCKF); | |
1903 | return (error); | |
1904 | } | |
1905 | } | |
1906 | /* | |
1907 | * No blocks!! Add the lock. Note that addlock will | |
1908 | * downgrade or upgrade any overlapping locks this | |
1909 | * process already owns. | |
1910 | */ | |
1911 | #ifdef LOCKF_DEBUG | |
1912 | if (lockf_debug & 4) | |
1913 | lf_print("ufs_advlock: got the lock", lock); | |
1914 | #endif /* LOCKF_DEBUG */ | |
1915 | lf_addlock(lock); | |
1916 | return (0); | |
1917 | } | |
1918 | ||
1919 | /* | |
1920 | * Remove a byte-range lock on an inode. | |
1921 | */ | |
1922 | ufs_advunlock(lock) | |
1923 | struct lockf *lock; | |
1924 | { | |
1925 | struct lockf *blocklist; | |
1926 | ||
1927 | if (lock->lf_inode->i_lockf == (struct lockf *)0) | |
1928 | return (0); | |
1929 | #ifdef LOCKF_DEBUG | |
1930 | if (lockf_debug & 4) | |
1931 | lf_print("ufs_advunlock", lock); | |
1932 | #endif /* LOCKF_DEBUG */ | |
1933 | /* | |
1934 | * Generally, find the lock (or an overlap to that lock) | |
1935 | * and remove it (or shrink it), then wakeup anyone we can. | |
1936 | */ | |
1937 | blocklist = lf_remove(lock); | |
1938 | FREE(lock, M_LOCKF); | |
1939 | lf_wakelock(blocklist); | |
1940 | return (0); | |
1941 | } | |
1942 | ||
1943 | /* | |
1944 | * Return the blocking pid | |
1945 | */ | |
1946 | ufs_advgetlock(lock, fl) | |
1947 | register struct lockf *lock; | |
1948 | register struct flock *fl; | |
1949 | { | |
1950 | register struct lockf *block; | |
1951 | off_t start, end; | |
1952 | ||
1953 | #ifdef LOCKF_DEBUG | |
1954 | if (lockf_debug & 4) | |
1955 | lf_print("ufs_advgetlock", lock); | |
1956 | #endif /* LOCKF_DEBUG */ | |
1957 | ||
1958 | if (block = lf_getblock(lock)) { | |
1959 | fl->l_type = block->lf_type; | |
1960 | fl->l_whence = SEEK_SET; | |
1961 | fl->l_start = block->lf_start; | |
1962 | if (block->lf_end == -1) | |
1963 | fl->l_len = 0; | |
1964 | else | |
1965 | fl->l_len = block->lf_end - block->lf_start; | |
1966 | if (block->lf_flags & F_POSIX) | |
1967 | fl->l_pid = ((struct proc *)(block->lf_id))->p_pid; | |
1968 | else | |
1969 | fl->l_pid = -1; | |
1970 | } | |
1971 | FREE(lock, M_LOCKF); | |
1972 | return (0); | |
1973 | } |