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 | * |
5e03b55d | 7 | * @(#)ufs_vnops.c 7.64.1.1 (Berkeley) %G% |
da7c5cc6 | 8 | */ |
6459ebe0 | 9 | |
94368568 JB |
10 | #include "param.h" |
11 | #include "systm.h" | |
c6f5111d MK |
12 | #include "namei.h" |
13 | #include "resourcevar.h" | |
94368568 JB |
14 | #include "kernel.h" |
15 | #include "file.h" | |
16 | #include "stat.h" | |
94368568 JB |
17 | #include "buf.h" |
18 | #include "proc.h" | |
7188ac27 | 19 | #include "conf.h" |
94368568 | 20 | #include "mount.h" |
7188ac27 | 21 | #include "vnode.h" |
0f93ba7b | 22 | #include "specdev.h" |
5b169cb7 | 23 | #include "fifo.h" |
0b0bf936 | 24 | #include "malloc.h" |
c6f5111d MK |
25 | |
26 | #include "lockf.h" | |
27 | #include "quota.h" | |
28 | #include "inode.h" | |
655da945 | 29 | #include "dir.h" |
c6f5111d | 30 | #include "fs.h" |
3e78e260 | 31 | |
4f083fd7 | 32 | /* |
7188ac27 | 33 | * Create a regular file |
4f083fd7 | 34 | */ |
5b169cb7 | 35 | ufs_create(ndp, vap, p) |
7188ac27 KM |
36 | struct nameidata *ndp; |
37 | struct vattr *vap; | |
5b169cb7 | 38 | struct proc *p; |
3e78e260 | 39 | { |
7188ac27 KM |
40 | struct inode *ip; |
41 | int error; | |
3e78e260 | 42 | |
7188ac27 KM |
43 | if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip)) |
44 | return (error); | |
45 | ndp->ni_vp = ITOV(ip); | |
46 | return (0); | |
3e78e260 BJ |
47 | } |
48 | ||
4f083fd7 | 49 | /* |
7188ac27 | 50 | * Mknod vnode call |
4f083fd7 | 51 | */ |
7188ac27 | 52 | /* ARGSUSED */ |
5b169cb7 | 53 | ufs_mknod(ndp, vap, cred, p) |
7188ac27 KM |
54 | struct nameidata *ndp; |
55 | struct ucred *cred; | |
56 | struct vattr *vap; | |
5b169cb7 | 57 | struct proc *p; |
3e78e260 | 58 | { |
f09fe6d3 | 59 | register struct vnode *vp; |
7188ac27 KM |
60 | struct inode *ip; |
61 | int error; | |
3e78e260 | 62 | |
7188ac27 KM |
63 | if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip)) |
64 | return (error); | |
d1c43d7f KM |
65 | ip->i_flag |= IACC|IUPD|ICHG; |
66 | if (vap->va_rdev != VNOVAL) { | |
7188ac27 KM |
67 | /* |
68 | * Want to be able to use this to make badblock | |
69 | * inodes, so don't truncate the dev number. | |
70 | */ | |
b373e060 | 71 | ip->i_rdev = vap->va_rdev; |
7188ac27 | 72 | } |
7188ac27 KM |
73 | /* |
74 | * Remove inode so that it will be reloaded by iget and | |
75 | * checked to see if it is an alias of an existing entry | |
76 | * in the inode cache. | |
77 | */ | |
d1c43d7f KM |
78 | vp = ITOV(ip); |
79 | vput(vp); | |
f09fe6d3 KM |
80 | vp->v_type = VNON; |
81 | vgone(vp); | |
7188ac27 | 82 | return (0); |
3e78e260 BJ |
83 | } |
84 | ||
85 | /* | |
7188ac27 KM |
86 | * Open called. |
87 | * | |
88 | * Nothing to do. | |
3e78e260 | 89 | */ |
7188ac27 | 90 | /* ARGSUSED */ |
5b169cb7 | 91 | ufs_open(vp, mode, cred, p) |
7188ac27 KM |
92 | struct vnode *vp; |
93 | int mode; | |
94 | struct ucred *cred; | |
5b169cb7 | 95 | struct proc *p; |
3e78e260 | 96 | { |
3e78e260 | 97 | |
7188ac27 | 98 | return (0); |
3e78e260 BJ |
99 | } |
100 | ||
101 | /* | |
7188ac27 KM |
102 | * Close called |
103 | * | |
104 | * Update the times on the inode. | |
3e78e260 | 105 | */ |
7188ac27 | 106 | /* ARGSUSED */ |
5b169cb7 | 107 | ufs_close(vp, fflag, cred, p) |
7188ac27 KM |
108 | struct vnode *vp; |
109 | int fflag; | |
110 | struct ucred *cred; | |
5b169cb7 | 111 | struct proc *p; |
3e78e260 | 112 | { |
7188ac27 | 113 | register struct inode *ip = VTOI(vp); |
3e78e260 | 114 | |
de67eefc | 115 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
7188ac27 KM |
116 | ITIMES(ip, &time, &time); |
117 | return (0); | |
3e78e260 BJ |
118 | } |
119 | ||
4b61628b KM |
120 | /* |
121 | * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. | |
122 | * The mode is shifted to select the owner/group/other fields. The | |
123 | * super user is granted all permissions. | |
124 | */ | |
5b169cb7 | 125 | ufs_access(vp, mode, cred, p) |
7188ac27 | 126 | struct vnode *vp; |
4b61628b | 127 | register int mode; |
7188ac27 | 128 | struct ucred *cred; |
5b169cb7 | 129 | struct proc *p; |
3e78e260 | 130 | { |
4b61628b KM |
131 | register struct inode *ip = VTOI(vp); |
132 | register gid_t *gp; | |
133 | int i, error; | |
3e78e260 | 134 | |
4b61628b KM |
135 | #ifdef DIAGNOSTIC |
136 | if (!VOP_ISLOCKED(vp)) { | |
137 | vprint("ufs_access: not locked", vp); | |
138 | panic("ufs_access: not locked"); | |
139 | } | |
140 | #endif | |
141 | #ifdef QUOTA | |
142 | if (mode & VWRITE) { | |
143 | switch (vp->v_type) { | |
144 | case VREG: case VDIR: case VLNK: | |
145 | if (error = getinoquota(ip)) | |
146 | return (error); | |
147 | } | |
148 | } | |
149 | #endif /* QUOTA */ | |
150 | /* | |
151 | * If you're the super-user, you always get access. | |
152 | */ | |
153 | if (cred->cr_uid == 0) | |
154 | return (0); | |
155 | /* | |
156 | * Access check is based on only one of owner, group, public. | |
157 | * If not owner, then check group. If not a member of the | |
158 | * group, then check public access. | |
159 | */ | |
160 | if (cred->cr_uid != ip->i_uid) { | |
161 | mode >>= 3; | |
162 | gp = cred->cr_groups; | |
163 | for (i = 0; i < cred->cr_ngroups; i++, gp++) | |
164 | if (ip->i_gid == *gp) | |
165 | goto found; | |
166 | mode >>= 3; | |
167 | found: | |
168 | ; | |
169 | } | |
170 | if ((ip->i_mode & mode) != 0) | |
171 | return (0); | |
172 | return (EACCES); | |
3e78e260 BJ |
173 | } |
174 | ||
7188ac27 | 175 | /* ARGSUSED */ |
5b169cb7 | 176 | ufs_getattr(vp, vap, cred, p) |
7188ac27 KM |
177 | struct vnode *vp; |
178 | register struct vattr *vap; | |
179 | struct ucred *cred; | |
5b169cb7 | 180 | struct proc *p; |
3e78e260 | 181 | { |
7188ac27 | 182 | register struct inode *ip = VTOI(vp); |
3e78e260 | 183 | |
7188ac27 | 184 | ITIMES(ip, &time, &time); |
3e78e260 | 185 | /* |
7188ac27 | 186 | * Copy from inode table |
3e78e260 | 187 | */ |
7188ac27 KM |
188 | vap->va_fsid = ip->i_dev; |
189 | vap->va_fileid = ip->i_number; | |
190 | vap->va_mode = ip->i_mode & ~IFMT; | |
191 | vap->va_nlink = ip->i_nlink; | |
192 | vap->va_uid = ip->i_uid; | |
193 | vap->va_gid = ip->i_gid; | |
194 | vap->va_rdev = (dev_t)ip->i_rdev; | |
4b61628b KM |
195 | #ifdef tahoe |
196 | vap->va_size = ip->i_size; | |
197 | vap->va_size_rsv = 0; | |
198 | #else | |
8fae943a | 199 | vap->va_qsize = ip->i_din.di_qsize; |
4b61628b | 200 | #endif |
7188ac27 | 201 | vap->va_atime.tv_sec = ip->i_atime; |
6ef53d70 | 202 | vap->va_atime.tv_usec = 0; |
7188ac27 | 203 | vap->va_mtime.tv_sec = ip->i_mtime; |
6ef53d70 | 204 | vap->va_mtime.tv_usec = 0; |
7188ac27 | 205 | vap->va_ctime.tv_sec = ip->i_ctime; |
6ef53d70 | 206 | vap->va_ctime.tv_usec = 0; |
d07fc92a KM |
207 | vap->va_flags = ip->i_flags; |
208 | vap->va_gen = ip->i_gen; | |
7188ac27 KM |
209 | /* this doesn't belong here */ |
210 | if (vp->v_type == VBLK) | |
211 | vap->va_blocksize = BLKDEV_IOSIZE; | |
212 | else if (vp->v_type == VCHR) | |
213 | vap->va_blocksize = MAXBSIZE; | |
8eee8525 | 214 | else |
7188ac27 | 215 | vap->va_blocksize = ip->i_fs->fs_bsize; |
a61a68d6 | 216 | vap->va_bytes = dbtob(ip->i_blocks); |
8fae943a | 217 | vap->va_bytes_rsv = 0; |
7188ac27 KM |
218 | vap->va_type = vp->v_type; |
219 | return (0); | |
3e78e260 BJ |
220 | } |
221 | ||
222 | /* | |
7188ac27 | 223 | * Set attribute vnode op. called from several syscalls |
3e78e260 | 224 | */ |
5b169cb7 | 225 | ufs_setattr(vp, vap, cred, p) |
7188ac27 KM |
226 | register struct vnode *vp; |
227 | register struct vattr *vap; | |
228 | register struct ucred *cred; | |
5b169cb7 | 229 | struct proc *p; |
3e78e260 | 230 | { |
7188ac27 KM |
231 | register struct inode *ip = VTOI(vp); |
232 | int error = 0; | |
b4d1aee9 | 233 | |
7188ac27 KM |
234 | /* |
235 | * Check for unsetable attributes. | |
236 | */ | |
237 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || | |
238 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || | |
239 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || | |
d07fc92a | 240 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
7188ac27 | 241 | return (EINVAL); |
b4d1aee9 | 242 | } |
7188ac27 KM |
243 | /* |
244 | * Go through the fields and update iff not VNOVAL. | |
245 | */ | |
246 | if (vap->va_uid != (u_short)VNOVAL || vap->va_gid != (u_short)VNOVAL) | |
c6f5111d | 247 | if (error = chown1(vp, vap->va_uid, vap->va_gid, p)) |
7188ac27 KM |
248 | return (error); |
249 | if (vap->va_size != VNOVAL) { | |
250 | if (vp->v_type == VDIR) | |
251 | return (EISDIR); | |
e16fa59e | 252 | if (error = itrunc(ip, vap->va_size, 0)) /* XXX IO_SYNC? */ |
7188ac27 | 253 | return (error); |
3e78e260 | 254 | } |
7188ac27 | 255 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { |
de412887 | 256 | if (cred->cr_uid != ip->i_uid && |
c6f5111d | 257 | (error = suser(cred, &p->p_acflag))) |
de412887 | 258 | return (error); |
7188ac27 KM |
259 | if (vap->va_atime.tv_sec != VNOVAL) |
260 | ip->i_flag |= IACC; | |
261 | if (vap->va_mtime.tv_sec != VNOVAL) | |
262 | ip->i_flag |= IUPD; | |
263 | ip->i_flag |= ICHG; | |
264 | if (error = iupdat(ip, &vap->va_atime, &vap->va_mtime, 1)) | |
265 | return (error); | |
5485e062 | 266 | } |
7188ac27 | 267 | if (vap->va_mode != (u_short)VNOVAL) |
c6f5111d | 268 | error = chmod1(vp, (int)vap->va_mode, p); |
d07fc92a KM |
269 | if (vap->va_flags != VNOVAL) { |
270 | if (cred->cr_uid != ip->i_uid && | |
c6f5111d | 271 | (error = suser(cred, &p->p_acflag))) |
d07fc92a KM |
272 | return (error); |
273 | if (cred->cr_uid == 0) { | |
274 | ip->i_flags = vap->va_flags; | |
275 | } else { | |
276 | ip->i_flags &= 0xffff0000; | |
277 | ip->i_flags |= (vap->va_flags & 0xffff); | |
278 | } | |
279 | ip->i_flag |= ICHG; | |
280 | } | |
7188ac27 | 281 | return (error); |
528f664c SL |
282 | } |
283 | ||
4f083fd7 SL |
284 | /* |
285 | * Change the mode on a file. | |
286 | * Inode must be locked before calling. | |
287 | */ | |
c6f5111d | 288 | chmod1(vp, mode, p) |
7188ac27 | 289 | register struct vnode *vp; |
528f664c | 290 | register int mode; |
c6f5111d | 291 | struct proc *p; |
528f664c | 292 | { |
c6f5111d | 293 | register struct ucred *cred = p->p_ucred; |
7188ac27 | 294 | register struct inode *ip = VTOI(vp); |
de412887 | 295 | int error; |
197da11b | 296 | |
de412887 | 297 | if (cred->cr_uid != ip->i_uid && |
c6f5111d | 298 | (error = suser(cred, &p->p_acflag))) |
de412887 | 299 | return (error); |
7188ac27 | 300 | if (cred->cr_uid) { |
e57b6138 | 301 | if (vp->v_type != VDIR && (mode & ISVTX)) |
39b5be4c | 302 | return (EFTYPE); |
e57b6138 | 303 | if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) |
39b5be4c | 304 | return (EPERM); |
f94ceb3b | 305 | } |
39b5be4c | 306 | ip->i_mode &= ~07777; |
7188ac27 | 307 | ip->i_mode |= mode & 07777; |
3e78e260 | 308 | ip->i_flag |= ICHG; |
7188ac27 | 309 | if ((vp->v_flag & VTEXT) && (ip->i_mode & ISVTX) == 0) |
8986c97c | 310 | (void) vnode_pager_uncache(vp); |
47af7174 | 311 | return (0); |
5485e062 BJ |
312 | } |
313 | ||
528f664c SL |
314 | /* |
315 | * Perform chown operation on inode ip; | |
316 | * inode must be locked prior to call. | |
317 | */ | |
c6f5111d | 318 | chown1(vp, uid, gid, p) |
7188ac27 KM |
319 | register struct vnode *vp; |
320 | uid_t uid; | |
321 | gid_t gid; | |
c6f5111d | 322 | struct proc *p; |
528f664c | 323 | { |
7188ac27 | 324 | register struct inode *ip = VTOI(vp); |
c6f5111d | 325 | register struct ucred *cred = p->p_ucred; |
4b61628b KM |
326 | uid_t ouid; |
327 | gid_t ogid; | |
328 | int error = 0; | |
528f664c | 329 | #ifdef QUOTA |
4b61628b KM |
330 | register int i; |
331 | long change; | |
bb1b75f4 | 332 | #endif |
528f664c | 333 | |
7188ac27 | 334 | if (uid == (u_short)VNOVAL) |
bb1b75f4 | 335 | uid = ip->i_uid; |
7188ac27 | 336 | if (gid == (u_short)VNOVAL) |
bb1b75f4 | 337 | gid = ip->i_gid; |
18b0bce6 KB |
338 | /* |
339 | * If we don't own the file, are trying to change the owner | |
340 | * of the file, or are not a member of the target group, | |
341 | * the caller must be superuser or the call fails. | |
342 | */ | |
7188ac27 KM |
343 | if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid || |
344 | !groupmember((gid_t)gid, cred)) && | |
c6f5111d | 345 | (error = suser(cred, &p->p_acflag))) |
7188ac27 | 346 | return (error); |
4b61628b KM |
347 | ouid = ip->i_uid; |
348 | ogid = ip->i_gid; | |
bb1b75f4 | 349 | #ifdef QUOTA |
4b61628b KM |
350 | if (error = getinoquota(ip)) |
351 | return (error); | |
352 | if (ouid == uid) { | |
353 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
354 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
355 | } | |
356 | if (ogid == gid) { | |
357 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
358 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
359 | } | |
360 | change = ip->i_blocks; | |
361 | (void) chkdq(ip, -change, cred, CHOWN); | |
362 | (void) chkiq(ip, -1, cred, CHOWN); | |
363 | for (i = 0; i < MAXQUOTAS; i++) { | |
364 | dqrele(vp, ip->i_dquot[i]); | |
365 | ip->i_dquot[i] = NODQUOT; | |
366 | } | |
f94ceb3b | 367 | #endif |
bb1b75f4 SL |
368 | ip->i_uid = uid; |
369 | ip->i_gid = gid; | |
528f664c | 370 | #ifdef QUOTA |
4b61628b KM |
371 | if ((error = getinoquota(ip)) == 0) { |
372 | if (ouid == uid) { | |
373 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
374 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
375 | } | |
376 | if (ogid == gid) { | |
377 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
378 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
379 | } | |
380 | if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { | |
381 | if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) | |
722a9b31 | 382 | goto good; |
4b61628b KM |
383 | else |
384 | (void) chkdq(ip, -change, cred, CHOWN|FORCE); | |
385 | } | |
386 | for (i = 0; i < MAXQUOTAS; i++) { | |
387 | dqrele(vp, ip->i_dquot[i]); | |
388 | ip->i_dquot[i] = NODQUOT; | |
389 | } | |
390 | } | |
391 | ip->i_uid = ouid; | |
392 | ip->i_gid = ogid; | |
393 | if (getinoquota(ip) == 0) { | |
394 | if (ouid == uid) { | |
395 | dqrele(vp, ip->i_dquot[USRQUOTA]); | |
396 | ip->i_dquot[USRQUOTA] = NODQUOT; | |
397 | } | |
398 | if (ogid == gid) { | |
399 | dqrele(vp, ip->i_dquot[GRPQUOTA]); | |
400 | ip->i_dquot[GRPQUOTA] = NODQUOT; | |
401 | } | |
722a9b31 KM |
402 | (void) chkdq(ip, change, cred, FORCE|CHOWN); |
403 | (void) chkiq(ip, 1, cred, FORCE|CHOWN); | |
6cb69bbe | 404 | (void) getinoquota(ip); |
4b61628b | 405 | } |
6cb69bbe | 406 | return (error); |
722a9b31 | 407 | good: |
6cb69bbe KM |
408 | if (getinoquota(ip)) |
409 | panic("chown: lost quota"); | |
410 | #endif /* QUOTA */ | |
4b61628b KM |
411 | if (ouid != uid || ogid != gid) |
412 | ip->i_flag |= ICHG; | |
413 | if (ouid != uid && cred->cr_uid != 0) | |
414 | ip->i_mode &= ~ISUID; | |
415 | if (ogid != gid && cred->cr_uid != 0) | |
416 | ip->i_mode &= ~ISGID; | |
417 | return (0); | |
d67a03eb BJ |
418 | } |
419 | ||
b373e060 KM |
420 | /* |
421 | * Vnode op for reading. | |
422 | */ | |
423 | /* ARGSUSED */ | |
424 | ufs_read(vp, uio, ioflag, cred) | |
425 | struct vnode *vp; | |
426 | register struct uio *uio; | |
427 | int ioflag; | |
428 | struct ucred *cred; | |
429 | { | |
430 | register struct inode *ip = VTOI(vp); | |
431 | register struct fs *fs; | |
432 | struct buf *bp; | |
433 | daddr_t lbn, bn, rablock; | |
20aa076b | 434 | int size, diff, error = 0; |
b373e060 KM |
435 | long n, on, type; |
436 | ||
5b169cb7 | 437 | #ifdef DIAGNOSTIC |
b373e060 KM |
438 | if (uio->uio_rw != UIO_READ) |
439 | panic("ufs_read mode"); | |
440 | type = ip->i_mode & IFMT; | |
441 | if (type != IFDIR && type != IFREG && type != IFLNK) | |
442 | panic("ufs_read type"); | |
5b169cb7 | 443 | #endif |
b373e060 KM |
444 | if (uio->uio_resid == 0) |
445 | return (0); | |
446 | if (uio->uio_offset < 0) | |
447 | return (EINVAL); | |
448 | ip->i_flag |= IACC; | |
449 | fs = ip->i_fs; | |
450 | do { | |
451 | lbn = lblkno(fs, uio->uio_offset); | |
452 | on = blkoff(fs, uio->uio_offset); | |
453 | n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid); | |
454 | diff = ip->i_size - uio->uio_offset; | |
455 | if (diff <= 0) | |
456 | return (0); | |
457 | if (diff < n) | |
458 | n = diff; | |
b373e060 | 459 | size = blksize(fs, ip, lbn); |
e16fa59e | 460 | rablock = lbn + 1; |
20aa076b KM |
461 | if (vp->v_lastr + 1 == lbn && |
462 | lblktosize(fs, rablock) < ip->i_size) | |
463 | error = breada(ITOV(ip), lbn, size, rablock, | |
464 | blksize(fs, ip, rablock), NOCRED, &bp); | |
b373e060 | 465 | else |
e16fa59e | 466 | error = bread(ITOV(ip), lbn, size, NOCRED, &bp); |
de67eefc | 467 | vp->v_lastr = lbn; |
b373e060 KM |
468 | n = MIN(n, size - bp->b_resid); |
469 | if (error) { | |
470 | brelse(bp); | |
471 | return (error); | |
472 | } | |
473 | error = uiomove(bp->b_un.b_addr + on, (int)n, uio); | |
474 | if (n + on == fs->fs_bsize || uio->uio_offset == ip->i_size) | |
475 | bp->b_flags |= B_AGE; | |
476 | brelse(bp); | |
477 | } while (error == 0 && uio->uio_resid > 0 && n != 0); | |
478 | return (error); | |
479 | } | |
480 | ||
481 | /* | |
482 | * Vnode op for writing. | |
483 | */ | |
484 | ufs_write(vp, uio, ioflag, cred) | |
485 | register struct vnode *vp; | |
486 | struct uio *uio; | |
487 | int ioflag; | |
488 | struct ucred *cred; | |
489 | { | |
5b169cb7 | 490 | struct proc *p = uio->uio_procp; |
b373e060 KM |
491 | register struct inode *ip = VTOI(vp); |
492 | register struct fs *fs; | |
493 | struct buf *bp; | |
494 | daddr_t lbn, bn; | |
495 | u_long osize; | |
8986c97c KM |
496 | int n, on, flags; |
497 | int size, resid, error = 0; | |
b373e060 | 498 | |
5b169cb7 | 499 | #ifdef DIAGNOSTIC |
b373e060 KM |
500 | if (uio->uio_rw != UIO_WRITE) |
501 | panic("ufs_write mode"); | |
5b169cb7 | 502 | #endif |
b373e060 KM |
503 | switch (vp->v_type) { |
504 | case VREG: | |
505 | if (ioflag & IO_APPEND) | |
506 | uio->uio_offset = ip->i_size; | |
507 | /* fall through */ | |
508 | case VLNK: | |
509 | break; | |
510 | ||
511 | case VDIR: | |
512 | if ((ioflag & IO_SYNC) == 0) | |
513 | panic("ufs_write nonsync dir write"); | |
514 | break; | |
515 | ||
516 | default: | |
517 | panic("ufs_write type"); | |
518 | } | |
519 | if (uio->uio_offset < 0) | |
520 | return (EINVAL); | |
521 | if (uio->uio_resid == 0) | |
522 | return (0); | |
523 | /* | |
524 | * Maybe this should be above the vnode op call, but so long as | |
525 | * file servers have no limits, i don't think it matters | |
526 | */ | |
b326e282 | 527 | if (vp->v_type == VREG && p && |
b373e060 | 528 | uio->uio_offset + uio->uio_resid > |
c6f5111d MK |
529 | p->p_rlimit[RLIMIT_FSIZE].rlim_cur) { |
530 | psignal(p, SIGXFSZ); | |
b373e060 KM |
531 | return (EFBIG); |
532 | } | |
533 | resid = uio->uio_resid; | |
534 | osize = ip->i_size; | |
535 | fs = ip->i_fs; | |
e16fa59e KM |
536 | flags = 0; |
537 | if (ioflag & IO_SYNC) | |
538 | flags = B_SYNC; | |
b373e060 KM |
539 | do { |
540 | lbn = lblkno(fs, uio->uio_offset); | |
541 | on = blkoff(fs, uio->uio_offset); | |
542 | n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid); | |
543 | if (n < fs->fs_bsize) | |
e16fa59e | 544 | flags |= B_CLRBUF; |
b373e060 | 545 | else |
e16fa59e KM |
546 | flags &= ~B_CLRBUF; |
547 | if (error = balloc(ip, lbn, (int)(on + n), &bp, flags)) | |
b373e060 | 548 | break; |
e16fa59e | 549 | bn = bp->b_blkno; |
8986c97c | 550 | if (uio->uio_offset + n > ip->i_size) { |
b373e060 | 551 | ip->i_size = uio->uio_offset + n; |
8986c97c KM |
552 | vnode_pager_setsize(vp, ip->i_size); |
553 | } | |
b373e060 | 554 | size = blksize(fs, ip, lbn); |
8986c97c | 555 | (void) vnode_pager_uncache(vp); |
b373e060 | 556 | n = MIN(n, size - bp->b_resid); |
b373e060 KM |
557 | error = uiomove(bp->b_un.b_addr + on, n, uio); |
558 | if (ioflag & IO_SYNC) | |
559 | (void) bwrite(bp); | |
560 | else if (n + on == fs->fs_bsize) { | |
561 | bp->b_flags |= B_AGE; | |
562 | bawrite(bp); | |
563 | } else | |
564 | bdwrite(bp); | |
565 | ip->i_flag |= IUPD|ICHG; | |
566 | if (cred->cr_uid != 0) | |
567 | ip->i_mode &= ~(ISUID|ISGID); | |
568 | } while (error == 0 && uio->uio_resid > 0 && n != 0); | |
569 | if (error && (ioflag & IO_UNIT)) { | |
e16fa59e | 570 | (void) itrunc(ip, osize, ioflag & IO_SYNC); |
b373e060 KM |
571 | uio->uio_offset -= resid - uio->uio_resid; |
572 | uio->uio_resid = resid; | |
573 | } | |
1c05ecaf KM |
574 | if (!error && (ioflag & IO_SYNC)) |
575 | error = iupdat(ip, &time, &time, 1); | |
b373e060 KM |
576 | return (error); |
577 | } | |
578 | ||
7188ac27 | 579 | /* ARGSUSED */ |
5b169cb7 | 580 | ufs_ioctl(vp, com, data, fflag, cred, p) |
7188ac27 KM |
581 | struct vnode *vp; |
582 | int com; | |
583 | caddr_t data; | |
584 | int fflag; | |
585 | struct ucred *cred; | |
5b169cb7 | 586 | struct proc *p; |
bb1b75f4 | 587 | { |
bb1b75f4 | 588 | |
7188ac27 KM |
589 | return (ENOTTY); |
590 | } | |
591 | ||
592 | /* ARGSUSED */ | |
5b169cb7 | 593 | ufs_select(vp, which, fflags, cred, p) |
7188ac27 | 594 | struct vnode *vp; |
d1c43d7f | 595 | int which, fflags; |
7188ac27 | 596 | struct ucred *cred; |
5b169cb7 | 597 | struct proc *p; |
7188ac27 KM |
598 | { |
599 | ||
5b169cb7 KM |
600 | /* |
601 | * We should really check to see if I/O is possible. | |
602 | */ | |
603 | return (1); | |
bb1b75f4 | 604 | } |
d67a03eb | 605 | |
4f083fd7 | 606 | /* |
7188ac27 KM |
607 | * Mmap a file |
608 | * | |
609 | * NB Currently unsupported. | |
4f083fd7 | 610 | */ |
7188ac27 | 611 | /* ARGSUSED */ |
5b169cb7 | 612 | ufs_mmap(vp, fflags, cred, p) |
7188ac27 KM |
613 | struct vnode *vp; |
614 | int fflags; | |
615 | struct ucred *cred; | |
5b169cb7 | 616 | struct proc *p; |
d67a03eb | 617 | { |
d67a03eb | 618 | |
7188ac27 | 619 | return (EINVAL); |
d67a03eb | 620 | } |
64d3a787 | 621 | |
4f083fd7 | 622 | /* |
7188ac27 | 623 | * Synch an open file. |
4f083fd7 | 624 | */ |
7188ac27 | 625 | /* ARGSUSED */ |
5b169cb7 | 626 | ufs_fsync(vp, fflags, cred, waitfor, p) |
7188ac27 KM |
627 | struct vnode *vp; |
628 | int fflags; | |
629 | struct ucred *cred; | |
86cdabf6 | 630 | int waitfor; |
5b169cb7 | 631 | struct proc *p; |
528f664c | 632 | { |
86cdabf6 | 633 | struct inode *ip = VTOI(vp); |
7188ac27 | 634 | |
5b169cb7 | 635 | if (fflags & FWRITE) |
7188ac27 | 636 | ip->i_flag |= ICHG; |
e16fa59e KM |
637 | vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); |
638 | return (iupdat(ip, &time, &time, waitfor == MNT_WAIT)); | |
528f664c SL |
639 | } |
640 | ||
4f083fd7 | 641 | /* |
7188ac27 KM |
642 | * Seek on a file |
643 | * | |
644 | * Nothing to do, so just return. | |
4f083fd7 | 645 | */ |
7188ac27 KM |
646 | /* ARGSUSED */ |
647 | ufs_seek(vp, oldoff, newoff, cred) | |
648 | struct vnode *vp; | |
649 | off_t oldoff, newoff; | |
650 | struct ucred *cred; | |
528f664c | 651 | { |
7188ac27 KM |
652 | |
653 | return (0); | |
654 | } | |
655 | ||
656 | /* | |
657 | * ufs remove | |
658 | * Hard to avoid races here, especially | |
659 | * in unlinking directories. | |
660 | */ | |
5b169cb7 | 661 | ufs_remove(ndp, p) |
7188ac27 | 662 | struct nameidata *ndp; |
5b169cb7 | 663 | struct proc *p; |
7188ac27 KM |
664 | { |
665 | register struct inode *ip, *dp; | |
666 | int error; | |
667 | ||
668 | ip = VTOI(ndp->ni_vp); | |
669 | dp = VTOI(ndp->ni_dvp); | |
670 | error = dirremove(ndp); | |
671 | if (!error) { | |
672 | ip->i_nlink--; | |
673 | ip->i_flag |= ICHG; | |
528f664c | 674 | } |
7188ac27 KM |
675 | if (dp == ip) |
676 | vrele(ITOV(ip)); | |
677 | else | |
678 | iput(ip); | |
679 | iput(dp); | |
680 | return (error); | |
4f083fd7 SL |
681 | } |
682 | ||
683 | /* | |
7188ac27 | 684 | * link vnode call |
4f083fd7 | 685 | */ |
5b169cb7 | 686 | ufs_link(vp, ndp, p) |
7188ac27 KM |
687 | register struct vnode *vp; |
688 | register struct nameidata *ndp; | |
5b169cb7 | 689 | struct proc *p; |
4f083fd7 | 690 | { |
7188ac27 KM |
691 | register struct inode *ip = VTOI(vp); |
692 | int error; | |
4f083fd7 | 693 | |
655da945 KM |
694 | #ifdef DIANOSTIC |
695 | if ((ndp->ni_nameiop & HASBUF) == 0) | |
696 | panic("ufs_link: no name"); | |
697 | #endif | |
698 | if ((unsigned short)ip->i_nlink >= LINK_MAX) { | |
699 | free(ndp->ni_pnbuf, M_NAMEI); | |
986aedaa | 700 | return (EMLINK); |
655da945 | 701 | } |
7188ac27 KM |
702 | if (ndp->ni_dvp != vp) |
703 | ILOCK(ip); | |
7188ac27 KM |
704 | ip->i_nlink++; |
705 | ip->i_flag |= ICHG; | |
706 | error = iupdat(ip, &time, &time, 1); | |
707 | if (!error) | |
708 | error = direnter(ip, ndp); | |
7188ac27 KM |
709 | if (ndp->ni_dvp != vp) |
710 | IUNLOCK(ip); | |
655da945 | 711 | FREE(ndp->ni_pnbuf, M_NAMEI); |
394d67a8 | 712 | vput(ndp->ni_dvp); |
7188ac27 KM |
713 | if (error) { |
714 | ip->i_nlink--; | |
82252d2b | 715 | ip->i_flag |= ICHG; |
7188ac27 KM |
716 | } |
717 | return (error); | |
528f664c SL |
718 | } |
719 | ||
4f083fd7 SL |
720 | /* |
721 | * Rename system call. | |
722 | * rename("foo", "bar"); | |
723 | * is essentially | |
724 | * unlink("bar"); | |
725 | * link("foo", "bar"); | |
726 | * unlink("foo"); | |
727 | * but ``atomically''. Can't do full commit without saving state in the | |
728 | * inode on disk which isn't feasible at this time. Best we can do is | |
729 | * always guarantee the target exists. | |
730 | * | |
731 | * Basic algorithm is: | |
732 | * | |
733 | * 1) Bump link count on source while we're linking it to the | |
7188ac27 | 734 | * target. This also ensure the inode won't be deleted out |
68f21562 KM |
735 | * from underneath us while we work (it may be truncated by |
736 | * a concurrent `trunc' or `open' for creation). | |
4f083fd7 SL |
737 | * 2) Link source to destination. If destination already exists, |
738 | * delete it first. | |
68f21562 KM |
739 | * 3) Unlink source reference to inode if still around. If a |
740 | * directory was moved and the parent of the destination | |
4f083fd7 SL |
741 | * is different from the source, patch the ".." entry in the |
742 | * directory. | |
4f083fd7 | 743 | */ |
5b169cb7 | 744 | ufs_rename(fndp, tndp, p) |
7188ac27 | 745 | register struct nameidata *fndp, *tndp; |
5b169cb7 | 746 | struct proc *p; |
528f664c | 747 | { |
4f083fd7 | 748 | register struct inode *ip, *xp, *dp; |
68f21562 KM |
749 | struct dirtemplate dirbuf; |
750 | int doingdirectory = 0, oldparent = 0, newparent = 0; | |
a5390dce | 751 | int error = 0; |
4f083fd7 | 752 | |
655da945 KM |
753 | #ifdef DIANOSTIC |
754 | if ((tndp->ni_nameiop & HASBUF) == 0 || | |
755 | (fndp->ni_nameiop & HASBUF) == 0) | |
756 | panic("ufs_rename: no name"); | |
757 | #endif | |
7188ac27 KM |
758 | dp = VTOI(fndp->ni_dvp); |
759 | ip = VTOI(fndp->ni_vp); | |
655da945 KM |
760 | /* |
761 | * Check if just deleting a link name. | |
762 | */ | |
763 | if (fndp->ni_vp == tndp->ni_vp) { | |
764 | VOP_ABORTOP(tndp); | |
765 | vput(tndp->ni_dvp); | |
766 | vput(tndp->ni_vp); | |
767 | vrele(fndp->ni_dvp); | |
768 | if ((ip->i_mode&IFMT) == IFDIR) { | |
769 | VOP_ABORTOP(fndp); | |
770 | vrele(fndp->ni_vp); | |
771 | return (EINVAL); | |
772 | } | |
773 | doingdirectory = 0; | |
774 | goto unlinkit; | |
775 | } | |
7188ac27 | 776 | ILOCK(ip); |
4f083fd7 | 777 | if ((ip->i_mode&IFMT) == IFDIR) { |
4f083fd7 | 778 | /* |
046f18d1 | 779 | * Avoid ".", "..", and aliases of "." for obvious reasons. |
4f083fd7 | 780 | */ |
655da945 KM |
781 | if ((fndp->ni_namelen == 1 && fndp->ni_ptr[0] == '.') || |
782 | dp == ip || fndp->ni_isdotdot || (ip->i_flag & IRENAME)) { | |
66955caf KM |
783 | VOP_ABORTOP(tndp); |
784 | vput(tndp->ni_dvp); | |
785 | if (tndp->ni_vp) | |
786 | vput(tndp->ni_vp); | |
787 | VOP_ABORTOP(fndp); | |
788 | vrele(fndp->ni_dvp); | |
789 | vput(fndp->ni_vp); | |
7188ac27 | 790 | return (EINVAL); |
4f083fd7 | 791 | } |
68f21562 | 792 | ip->i_flag |= IRENAME; |
4f083fd7 SL |
793 | oldparent = dp->i_number; |
794 | doingdirectory++; | |
795 | } | |
7188ac27 | 796 | vrele(fndp->ni_dvp); |
4f083fd7 SL |
797 | |
798 | /* | |
799 | * 1) Bump link count while we're moving stuff | |
800 | * around. If we crash somewhere before | |
801 | * completing our work, the link count | |
802 | * may be wrong, but correctable. | |
803 | */ | |
804 | ip->i_nlink++; | |
805 | ip->i_flag |= ICHG; | |
7188ac27 | 806 | error = iupdat(ip, &time, &time, 1); |
a388503d | 807 | IUNLOCK(ip); |
4f083fd7 SL |
808 | |
809 | /* | |
810 | * When the target exists, both the directory | |
7188ac27 | 811 | * and target vnodes are returned locked. |
4f083fd7 | 812 | */ |
7188ac27 KM |
813 | dp = VTOI(tndp->ni_dvp); |
814 | xp = NULL; | |
815 | if (tndp->ni_vp) | |
816 | xp = VTOI(tndp->ni_vp); | |
046f18d1 SL |
817 | /* |
818 | * If ".." must be changed (ie the directory gets a new | |
81552f0f KM |
819 | * parent) then the source directory must not be in the |
820 | * directory heirarchy above the target, as this would | |
821 | * orphan everything below the source directory. Also | |
822 | * the user must have write permission in the source so | |
823 | * as to be able to change "..". We must repeat the call | |
824 | * to namei, as the parent directory is unlocked by the | |
825 | * call to checkpath(). | |
046f18d1 | 826 | */ |
68f21562 KM |
827 | if (oldparent != dp->i_number) |
828 | newparent = dp->i_number; | |
829 | if (doingdirectory && newparent) { | |
48c3b6e8 | 830 | VOP_LOCK(fndp->ni_vp); |
5b169cb7 | 831 | error = ufs_access(fndp->ni_vp, VWRITE, tndp->ni_cred, p); |
48c3b6e8 KM |
832 | VOP_UNLOCK(fndp->ni_vp); |
833 | if (error) | |
81552f0f | 834 | goto bad; |
655da945 KM |
835 | if (xp != NULL) |
836 | iput(xp); | |
837 | if (error = checkpath(ip, dp, tndp->ni_cred)) | |
838 | goto out; | |
839 | if ((tndp->ni_nameiop & SAVESTART) == 0) | |
840 | panic("ufs_rename: lost to startdir"); | |
5e03b55d | 841 | p->p_spare[1]--; |
655da945 KM |
842 | if (error = lookup(tndp, p)) |
843 | goto out; | |
844 | dp = VTOI(tndp->ni_dvp); | |
845 | xp = NULL; | |
846 | if (tndp->ni_vp) | |
847 | xp = VTOI(tndp->ni_vp); | |
81552f0f | 848 | } |
4f083fd7 SL |
849 | /* |
850 | * 2) If target doesn't exist, link the target | |
851 | * to the source and unlink the source. | |
852 | * Otherwise, rewrite the target directory | |
853 | * entry to reference the source inode and | |
854 | * expunge the original entry's existence. | |
855 | */ | |
4f083fd7 | 856 | if (xp == NULL) { |
7188ac27 KM |
857 | if (dp->i_dev != ip->i_dev) |
858 | panic("rename: EXDEV"); | |
4f083fd7 | 859 | /* |
68f21562 KM |
860 | * Account for ".." in new directory. |
861 | * When source and destination have the same | |
862 | * parent we don't fool with the link count. | |
4f083fd7 | 863 | */ |
68f21562 | 864 | if (doingdirectory && newparent) { |
986aedaa KM |
865 | if ((unsigned short)dp->i_nlink >= LINK_MAX) { |
866 | error = EMLINK; | |
867 | goto bad; | |
868 | } | |
4f083fd7 SL |
869 | dp->i_nlink++; |
870 | dp->i_flag |= ICHG; | |
986aedaa KM |
871 | if (error = iupdat(dp, &time, &time, 1)) |
872 | goto bad; | |
4f083fd7 | 873 | } |
394d67a8 KM |
874 | if (error = direnter(ip, tndp)) { |
875 | if (doingdirectory && newparent) { | |
876 | dp->i_nlink--; | |
877 | dp->i_flag |= ICHG; | |
878 | (void) iupdat(dp, &time, &time, 1); | |
879 | } | |
880 | goto bad; | |
881 | } | |
4093ba31 | 882 | iput(dp); |
4f083fd7 | 883 | } else { |
7188ac27 KM |
884 | if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) |
885 | panic("rename: EXDEV"); | |
e69c3c9c SL |
886 | /* |
887 | * Short circuit rename(foo, foo). | |
888 | */ | |
889 | if (xp->i_number == ip->i_number) | |
7188ac27 | 890 | panic("rename: same file"); |
80cee150 JB |
891 | /* |
892 | * If the parent directory is "sticky", then the user must | |
893 | * own the parent directory, or the destination of the rename, | |
894 | * otherwise the destination may not be changed (except by | |
895 | * root). This implements append-only directories. | |
896 | */ | |
7188ac27 KM |
897 | if ((dp->i_mode & ISVTX) && tndp->ni_cred->cr_uid != 0 && |
898 | tndp->ni_cred->cr_uid != dp->i_uid && | |
899 | xp->i_uid != tndp->ni_cred->cr_uid) { | |
80cee150 JB |
900 | error = EPERM; |
901 | goto bad; | |
902 | } | |
4f083fd7 | 903 | /* |
655da945 KM |
904 | * Target must be empty if a directory and have no links |
905 | * to it. Also, ensure source and target are compatible | |
906 | * (both directories, or both not directories). | |
4f083fd7 SL |
907 | */ |
908 | if ((xp->i_mode&IFMT) == IFDIR) { | |
7188ac27 KM |
909 | if (!dirempty(xp, dp->i_number, tndp->ni_cred) || |
910 | xp->i_nlink > 2) { | |
a5390dce | 911 | error = ENOTEMPTY; |
4f083fd7 SL |
912 | goto bad; |
913 | } | |
914 | if (!doingdirectory) { | |
a5390dce | 915 | error = ENOTDIR; |
4f083fd7 SL |
916 | goto bad; |
917 | } | |
7188ac27 | 918 | cache_purge(ITOV(dp)); |
4f083fd7 | 919 | } else if (doingdirectory) { |
a5390dce | 920 | error = EISDIR; |
4f083fd7 SL |
921 | goto bad; |
922 | } | |
7188ac27 KM |
923 | if (error = dirrewrite(dp, ip, tndp)) |
924 | goto bad; | |
a62786b9 KM |
925 | /* |
926 | * If the target directory is in the same | |
927 | * directory as the source directory, | |
928 | * decrement the link count on the parent | |
929 | * of the target directory. | |
930 | */ | |
931 | if (doingdirectory && !newparent) { | |
932 | dp->i_nlink--; | |
933 | dp->i_flag |= ICHG; | |
934 | } | |
7188ac27 | 935 | vput(ITOV(dp)); |
4f083fd7 | 936 | /* |
a5390dce SL |
937 | * Adjust the link count of the target to |
938 | * reflect the dirrewrite above. If this is | |
939 | * a directory it is empty and there are | |
940 | * no links to it, so we can squash the inode and | |
941 | * any space associated with it. We disallowed | |
942 | * renaming over top of a directory with links to | |
68f21562 KM |
943 | * it above, as the remaining link would point to |
944 | * a directory without "." or ".." entries. | |
4f083fd7 | 945 | */ |
a5390dce | 946 | xp->i_nlink--; |
4f083fd7 | 947 | if (doingdirectory) { |
a5390dce SL |
948 | if (--xp->i_nlink != 0) |
949 | panic("rename: linked directory"); | |
e16fa59e | 950 | error = itrunc(xp, (u_long)0, IO_SYNC); |
a5390dce | 951 | } |
4f083fd7 | 952 | xp->i_flag |= ICHG; |
88d931ba | 953 | iput(xp); |
31db12cb | 954 | xp = NULL; |
4f083fd7 SL |
955 | } |
956 | ||
957 | /* | |
958 | * 3) Unlink the source. | |
959 | */ | |
655da945 KM |
960 | unlinkit: |
961 | fndp->ni_nameiop &= ~MODMASK; | |
962 | fndp->ni_nameiop |= LOCKPARENT | LOCKLEAF; | |
963 | if ((fndp->ni_nameiop & SAVESTART) == 0) | |
964 | panic("ufs_rename: lost from startdir"); | |
5e03b55d | 965 | p->p_spare[1]--; |
655da945 | 966 | (void) lookup(fndp, p); |
7188ac27 KM |
967 | if (fndp->ni_vp != NULL) { |
968 | xp = VTOI(fndp->ni_vp); | |
969 | dp = VTOI(fndp->ni_dvp); | |
970 | } else { | |
d9d75b8f KM |
971 | /* |
972 | * From name has disappeared. | |
973 | */ | |
974 | if (doingdirectory) | |
975 | panic("rename: lost dir entry"); | |
976 | vrele(ITOV(ip)); | |
977 | return (0); | |
7188ac27 | 978 | } |
4f083fd7 | 979 | /* |
7188ac27 | 980 | * Ensure that the directory entry still exists and has not |
68f21562 KM |
981 | * changed while the new name has been entered. If the source is |
982 | * a file then the entry may have been unlinked or renamed. In | |
983 | * either case there is no further work to be done. If the source | |
984 | * is a directory then it cannot have been rmdir'ed; its link | |
985 | * count of three would cause a rmdir to fail with ENOTEMPTY. | |
7188ac27 | 986 | * The IRENAME flag ensures that it cannot be moved by another |
68f21562 | 987 | * rename. |
4f083fd7 | 988 | */ |
4f1a9037 | 989 | if (xp != ip) { |
68f21562 | 990 | if (doingdirectory) |
4f1a9037 | 991 | panic("rename: lost dir entry"); |
68f21562 | 992 | } else { |
4f083fd7 | 993 | /* |
68f21562 KM |
994 | * If the source is a directory with a |
995 | * new parent, the link count of the old | |
996 | * parent directory must be decremented | |
997 | * and ".." set to point to the new parent. | |
4f083fd7 | 998 | */ |
68f21562 | 999 | if (doingdirectory && newparent) { |
4f083fd7 SL |
1000 | dp->i_nlink--; |
1001 | dp->i_flag |= ICHG; | |
86cdabf6 | 1002 | error = vn_rdwr(UIO_READ, ITOV(xp), (caddr_t)&dirbuf, |
7188ac27 | 1003 | sizeof (struct dirtemplate), (off_t)0, |
86cdabf6 | 1004 | UIO_SYSSPACE, IO_NODELOCKED, |
5b169cb7 | 1005 | tndp->ni_cred, (int *)0, (struct proc *)0); |
68f21562 KM |
1006 | if (error == 0) { |
1007 | if (dirbuf.dotdot_namlen != 2 || | |
1008 | dirbuf.dotdot_name[0] != '.' || | |
1009 | dirbuf.dotdot_name[1] != '.') { | |
8ad54d9e | 1010 | dirbad(xp, 12, "rename: mangled dir"); |
68f21562 KM |
1011 | } else { |
1012 | dirbuf.dotdot_ino = newparent; | |
86cdabf6 | 1013 | (void) vn_rdwr(UIO_WRITE, ITOV(xp), |
68f21562 KM |
1014 | (caddr_t)&dirbuf, |
1015 | sizeof (struct dirtemplate), | |
93e273b9 | 1016 | (off_t)0, UIO_SYSSPACE, |
86cdabf6 | 1017 | IO_NODELOCKED|IO_SYNC, |
5b169cb7 KM |
1018 | tndp->ni_cred, (int *)0, |
1019 | (struct proc *)0); | |
7188ac27 | 1020 | cache_purge(ITOV(dp)); |
68f21562 KM |
1021 | } |
1022 | } | |
4f083fd7 | 1023 | } |
7188ac27 KM |
1024 | error = dirremove(fndp); |
1025 | if (!error) { | |
68f21562 KM |
1026 | xp->i_nlink--; |
1027 | xp->i_flag |= ICHG; | |
4f083fd7 | 1028 | } |
68f21562 | 1029 | xp->i_flag &= ~IRENAME; |
4f083fd7 | 1030 | } |
4f083fd7 | 1031 | if (dp) |
7188ac27 | 1032 | vput(ITOV(dp)); |
68f21562 | 1033 | if (xp) |
7188ac27 KM |
1034 | vput(ITOV(xp)); |
1035 | vrele(ITOV(ip)); | |
1036 | return (error); | |
a5390dce | 1037 | |
4f083fd7 | 1038 | bad: |
4f083fd7 | 1039 | if (xp) |
7188ac27 KM |
1040 | vput(ITOV(xp)); |
1041 | vput(ITOV(dp)); | |
4f083fd7 SL |
1042 | out: |
1043 | ip->i_nlink--; | |
1044 | ip->i_flag |= ICHG; | |
7188ac27 KM |
1045 | vrele(ITOV(ip)); |
1046 | return (error); | |
64d3a787 | 1047 | } |
88a7a62a SL |
1048 | |
1049 | /* | |
1050 | * A virgin directory (no blushing please). | |
1051 | */ | |
1052 | struct dirtemplate mastertemplate = { | |
1053 | 0, 12, 1, ".", | |
1054 | 0, DIRBLKSIZ - 12, 2, ".." | |
1055 | }; | |
1056 | ||
1057 | /* | |
1058 | * Mkdir system call | |
1059 | */ | |
5b169cb7 | 1060 | ufs_mkdir(ndp, vap, p) |
7188ac27 KM |
1061 | struct nameidata *ndp; |
1062 | struct vattr *vap; | |
5b169cb7 | 1063 | struct proc *p; |
88a7a62a | 1064 | { |
88a7a62a | 1065 | register struct inode *ip, *dp; |
7188ac27 KM |
1066 | struct inode *tip; |
1067 | struct vnode *dvp; | |
88a7a62a | 1068 | struct dirtemplate dirtemplate; |
7188ac27 KM |
1069 | int error; |
1070 | int dmode; | |
1071 | ||
655da945 KM |
1072 | #ifdef DIANOSTIC |
1073 | if ((ndp->ni_nameiop & HASBUF) == 0) | |
1074 | panic("ufs_mkdir: no name"); | |
1075 | #endif | |
7188ac27 KM |
1076 | dvp = ndp->ni_dvp; |
1077 | dp = VTOI(dvp); | |
986aedaa | 1078 | if ((unsigned short)dp->i_nlink >= LINK_MAX) { |
655da945 | 1079 | free(ndp->ni_pnbuf, M_NAMEI); |
986aedaa KM |
1080 | iput(dp); |
1081 | return (EMLINK); | |
1082 | } | |
7188ac27 KM |
1083 | dmode = vap->va_mode&0777; |
1084 | dmode |= IFDIR; | |
88a7a62a | 1085 | /* |
655da945 KM |
1086 | * Must simulate part of maknode here to acquire the inode, but |
1087 | * not have it entered in the parent directory. The entry is made | |
1088 | * later after writing "." and ".." entries. | |
88a7a62a | 1089 | */ |
4b61628b | 1090 | if (error = ialloc(dp, dirpref(dp->i_fs), dmode, ndp->ni_cred, &tip)) { |
655da945 | 1091 | free(ndp->ni_pnbuf, M_NAMEI); |
88a7a62a | 1092 | iput(dp); |
7188ac27 | 1093 | return (error); |
88a7a62a | 1094 | } |
7188ac27 | 1095 | ip = tip; |
4b61628b KM |
1096 | ip->i_uid = ndp->ni_cred->cr_uid; |
1097 | ip->i_gid = dp->i_gid; | |
88a7a62a | 1098 | #ifdef QUOTA |
4b61628b KM |
1099 | if ((error = getinoquota(ip)) || |
1100 | (error = chkiq(ip, 1, ndp->ni_cred, 0))) { | |
655da945 | 1101 | free(ndp->ni_pnbuf, M_NAMEI); |
4b61628b KM |
1102 | ifree(ip, ip->i_number, dmode); |
1103 | iput(ip); | |
1104 | iput(dp); | |
1105 | return (error); | |
1106 | } | |
88a7a62a SL |
1107 | #endif |
1108 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
1109 | ip->i_mode = dmode; |
1110 | ITOV(ip)->v_type = VDIR; /* Rest init'd in iget() */ | |
88a7a62a | 1111 | ip->i_nlink = 2; |
7188ac27 | 1112 | error = iupdat(ip, &time, &time, 1); |
88a7a62a SL |
1113 | |
1114 | /* | |
1115 | * Bump link count in parent directory | |
1116 | * to reflect work done below. Should | |
1117 | * be done before reference is created | |
1118 | * so reparation is possible if we crash. | |
1119 | */ | |
1120 | dp->i_nlink++; | |
1121 | dp->i_flag |= ICHG; | |
394d67a8 KM |
1122 | if (error = iupdat(dp, &time, &time, 1)) |
1123 | goto bad; | |
88a7a62a SL |
1124 | |
1125 | /* | |
1126 | * Initialize directory with "." | |
1127 | * and ".." from static template. | |
1128 | */ | |
1129 | dirtemplate = mastertemplate; | |
1130 | dirtemplate.dot_ino = ip->i_number; | |
1131 | dirtemplate.dotdot_ino = dp->i_number; | |
86cdabf6 | 1132 | error = vn_rdwr(UIO_WRITE, ITOV(ip), (caddr_t)&dirtemplate, |
5b169cb7 KM |
1133 | sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, |
1134 | IO_NODELOCKED|IO_SYNC, ndp->ni_cred, (int *)0, (struct proc *)0); | |
7188ac27 | 1135 | if (error) { |
88a7a62a SL |
1136 | dp->i_nlink--; |
1137 | dp->i_flag |= ICHG; | |
1138 | goto bad; | |
1139 | } | |
15365e07 | 1140 | if (DIRBLKSIZ > dp->i_fs->fs_fsize) { |
7188ac27 | 1141 | panic("mkdir: blksize"); /* XXX - should grow w/balloc() */ |
15365e07 | 1142 | } else { |
23de9f20 | 1143 | ip->i_size = DIRBLKSIZ; |
15365e07 KM |
1144 | ip->i_flag |= ICHG; |
1145 | } | |
88a7a62a SL |
1146 | /* |
1147 | * Directory all set up, now | |
1148 | * install the entry for it in | |
1149 | * the parent directory. | |
1150 | */ | |
394d67a8 | 1151 | if (error = direnter(ip, ndp)) { |
2a5d2f56 KM |
1152 | dp->i_nlink--; |
1153 | dp->i_flag |= ICHG; | |
88a7a62a SL |
1154 | } |
1155 | bad: | |
1156 | /* | |
1157 | * No need to do an explicit itrunc here, | |
7188ac27 | 1158 | * vrele will do this for us because we set |
88a7a62a SL |
1159 | * the link count to 0. |
1160 | */ | |
7188ac27 | 1161 | if (error) { |
88a7a62a SL |
1162 | ip->i_nlink = 0; |
1163 | ip->i_flag |= ICHG; | |
cbcdacd6 KM |
1164 | iput(ip); |
1165 | } else | |
1166 | ndp->ni_vp = ITOV(ip); | |
655da945 | 1167 | FREE(ndp->ni_pnbuf, M_NAMEI); |
394d67a8 | 1168 | iput(dp); |
7188ac27 | 1169 | return (error); |
88a7a62a SL |
1170 | } |
1171 | ||
1172 | /* | |
1173 | * Rmdir system call. | |
1174 | */ | |
5b169cb7 | 1175 | ufs_rmdir(ndp, p) |
7188ac27 | 1176 | register struct nameidata *ndp; |
5b169cb7 | 1177 | struct proc *p; |
88a7a62a | 1178 | { |
88a7a62a | 1179 | register struct inode *ip, *dp; |
7188ac27 KM |
1180 | int error = 0; |
1181 | ||
1182 | ip = VTOI(ndp->ni_vp); | |
1183 | dp = VTOI(ndp->ni_dvp); | |
88a7a62a SL |
1184 | /* |
1185 | * No rmdir "." please. | |
1186 | */ | |
1187 | if (dp == ip) { | |
7188ac27 | 1188 | vrele(ITOV(dp)); |
88a7a62a | 1189 | iput(ip); |
7188ac27 | 1190 | return (EINVAL); |
88a7a62a SL |
1191 | } |
1192 | /* | |
1193 | * Verify the directory is empty (and valid). | |
1194 | * (Rmdir ".." won't be valid since | |
1195 | * ".." will contain a reference to | |
1196 | * the current directory and thus be | |
1197 | * non-empty.) | |
1198 | */ | |
7188ac27 KM |
1199 | if (ip->i_nlink != 2 || !dirempty(ip, dp->i_number, ndp->ni_cred)) { |
1200 | error = ENOTEMPTY; | |
88a7a62a SL |
1201 | goto out; |
1202 | } | |
1203 | /* | |
1204 | * Delete reference to directory before purging | |
1205 | * inode. If we crash in between, the directory | |
1206 | * will be reattached to lost+found, | |
1207 | */ | |
7188ac27 | 1208 | if (error = dirremove(ndp)) |
88a7a62a SL |
1209 | goto out; |
1210 | dp->i_nlink--; | |
1211 | dp->i_flag |= ICHG; | |
7188ac27 | 1212 | cache_purge(ITOV(dp)); |
88a7a62a | 1213 | iput(dp); |
7188ac27 | 1214 | ndp->ni_dvp = NULL; |
88a7a62a SL |
1215 | /* |
1216 | * Truncate inode. The only stuff left | |
1217 | * in the directory is "." and "..". The | |
1218 | * "." reference is inconsequential since | |
1219 | * we're quashing it. The ".." reference | |
1220 | * has already been adjusted above. We've | |
1221 | * removed the "." reference and the reference | |
1222 | * in the parent directory, but there may be | |
1223 | * other hard links so decrement by 2 and | |
1224 | * worry about them later. | |
1225 | */ | |
1226 | ip->i_nlink -= 2; | |
e16fa59e | 1227 | error = itrunc(ip, (u_long)0, IO_SYNC); |
7188ac27 | 1228 | cache_purge(ITOV(ip)); |
88a7a62a | 1229 | out: |
7188ac27 | 1230 | if (ndp->ni_dvp) |
88a7a62a SL |
1231 | iput(dp); |
1232 | iput(ip); | |
7188ac27 | 1233 | return (error); |
88a7a62a SL |
1234 | } |
1235 | ||
7188ac27 KM |
1236 | /* |
1237 | * symlink -- make a symbolic link | |
1238 | */ | |
5b169cb7 | 1239 | ufs_symlink(ndp, vap, target, p) |
7188ac27 KM |
1240 | struct nameidata *ndp; |
1241 | struct vattr *vap; | |
1242 | char *target; | |
5b169cb7 | 1243 | struct proc *p; |
7188ac27 KM |
1244 | { |
1245 | struct inode *ip; | |
1246 | int error; | |
1247 | ||
1248 | error = maknode(IFLNK | vap->va_mode, ndp, &ip); | |
1249 | if (error) | |
1250 | return (error); | |
86cdabf6 | 1251 | error = vn_rdwr(UIO_WRITE, ITOV(ip), target, strlen(target), (off_t)0, |
5b169cb7 KM |
1252 | UIO_SYSSPACE, IO_NODELOCKED, ndp->ni_cred, (int *)0, |
1253 | (struct proc *)0); | |
7188ac27 KM |
1254 | iput(ip); |
1255 | return (error); | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Vnode op for read and write | |
1260 | */ | |
930730fd | 1261 | ufs_readdir(vp, uio, cred, eofflagp) |
7188ac27 KM |
1262 | struct vnode *vp; |
1263 | register struct uio *uio; | |
7188ac27 | 1264 | struct ucred *cred; |
930730fd | 1265 | int *eofflagp; |
88a7a62a | 1266 | { |
86cdabf6 | 1267 | int count, lost, error; |
88a7a62a | 1268 | |
7188ac27 KM |
1269 | count = uio->uio_resid; |
1270 | count &= ~(DIRBLKSIZ - 1); | |
86cdabf6 KM |
1271 | lost = uio->uio_resid - count; |
1272 | if (count < DIRBLKSIZ || (uio->uio_offset & (DIRBLKSIZ -1))) | |
7188ac27 | 1273 | return (EINVAL); |
7188ac27 KM |
1274 | uio->uio_resid = count; |
1275 | uio->uio_iov->iov_len = count; | |
86cdabf6 KM |
1276 | error = ufs_read(vp, uio, 0, cred); |
1277 | uio->uio_resid += lost; | |
930730fd KM |
1278 | if ((VTOI(vp)->i_size - uio->uio_offset) <= 0) |
1279 | *eofflagp = 1; | |
1280 | else | |
1281 | *eofflagp = 0; | |
7188ac27 KM |
1282 | return (error); |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * Return target name of a symbolic link | |
1287 | */ | |
1288 | ufs_readlink(vp, uiop, cred) | |
1289 | struct vnode *vp; | |
1290 | struct uio *uiop; | |
1291 | struct ucred *cred; | |
1292 | { | |
1293 | ||
86cdabf6 | 1294 | return (ufs_read(vp, uiop, 0, cred)); |
7188ac27 KM |
1295 | } |
1296 | ||
1297 | /* | |
1298 | * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually | |
655da945 | 1299 | * done. If a buffer has been saved in anticipation of a CREATE, delete it. |
7188ac27 | 1300 | */ |
66955caf | 1301 | /* ARGSUSED */ |
7188ac27 | 1302 | ufs_abortop(ndp) |
66955caf | 1303 | struct nameidata *ndp; |
7188ac27 | 1304 | { |
7188ac27 | 1305 | |
655da945 KM |
1306 | if ((ndp->ni_nameiop & (HASBUF | SAVESTART)) == HASBUF) |
1307 | FREE(ndp->ni_pnbuf, M_NAMEI); | |
66955caf | 1308 | return (0); |
7188ac27 KM |
1309 | } |
1310 | ||
1c3ebc10 KM |
1311 | /* |
1312 | * Lock an inode. | |
1313 | */ | |
7188ac27 KM |
1314 | ufs_lock(vp) |
1315 | struct vnode *vp; | |
1316 | { | |
1317 | register struct inode *ip = VTOI(vp); | |
1318 | ||
1319 | ILOCK(ip); | |
1320 | return (0); | |
1321 | } | |
1322 | ||
1c3ebc10 KM |
1323 | /* |
1324 | * Unlock an inode. | |
1325 | */ | |
7188ac27 KM |
1326 | ufs_unlock(vp) |
1327 | struct vnode *vp; | |
1328 | { | |
1329 | register struct inode *ip = VTOI(vp); | |
1330 | ||
1331 | if (!(ip->i_flag & ILOCKED)) | |
1332 | panic("ufs_unlock NOT LOCKED"); | |
1333 | IUNLOCK(ip); | |
1334 | return (0); | |
1335 | } | |
1336 | ||
1c3ebc10 KM |
1337 | /* |
1338 | * Check for a locked inode. | |
1339 | */ | |
1340 | ufs_islocked(vp) | |
1341 | struct vnode *vp; | |
1342 | { | |
1343 | ||
1344 | if (VTOI(vp)->i_flag & ILOCKED) | |
1345 | return (1); | |
1346 | return (0); | |
1347 | } | |
1348 | ||
7188ac27 KM |
1349 | /* |
1350 | * Get access to bmap | |
1351 | */ | |
1352 | ufs_bmap(vp, bn, vpp, bnp) | |
1353 | struct vnode *vp; | |
1354 | daddr_t bn; | |
1355 | struct vnode **vpp; | |
1356 | daddr_t *bnp; | |
1357 | { | |
1358 | struct inode *ip = VTOI(vp); | |
1359 | ||
1360 | if (vpp != NULL) | |
1361 | *vpp = ip->i_devvp; | |
1362 | if (bnp == NULL) | |
1363 | return (0); | |
4f1ff475 | 1364 | return (bmap(ip, bn, bnp)); |
88a7a62a SL |
1365 | } |
1366 | ||
1367 | /* | |
4f1ff475 KM |
1368 | * Calculate the logical to physical mapping if not done already, |
1369 | * then call the device strategy routine. | |
88a7a62a | 1370 | */ |
4f1ff475 | 1371 | int checkoverlap = 0; |
e16fa59e | 1372 | |
7188ac27 KM |
1373 | ufs_strategy(bp) |
1374 | register struct buf *bp; | |
88a7a62a | 1375 | { |
e16fa59e | 1376 | register struct inode *ip = VTOI(bp->b_vp); |
e16fa59e | 1377 | struct vnode *vp; |
e16fa59e KM |
1378 | int error; |
1379 | ||
1380 | if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) | |
1381 | panic("ufs_strategy: spec"); | |
1382 | if (bp->b_blkno == bp->b_lblkno) { | |
1383 | if (error = bmap(ip, bp->b_lblkno, &bp->b_blkno)) | |
1384 | return (error); | |
20aa076b | 1385 | if ((long)bp->b_blkno == -1) |
e16fa59e | 1386 | clrbuf(bp); |
e16fa59e | 1387 | } |
20aa076b KM |
1388 | if ((long)bp->b_blkno == -1) { |
1389 | biodone(bp); | |
e16fa59e | 1390 | return (0); |
20aa076b | 1391 | } |
4f1ff475 | 1392 | #ifdef DIAGNOSTIC |
e16fa59e | 1393 | if (checkoverlap) { |
4f1ff475 KM |
1394 | register struct buf *ep; |
1395 | struct buf *ebp; | |
1396 | daddr_t start, last; | |
1397 | ||
e16fa59e KM |
1398 | ebp = &buf[nbuf]; |
1399 | start = bp->b_blkno; | |
1400 | last = start + btodb(bp->b_bcount) - 1; | |
1401 | for (ep = buf; ep < ebp; ep++) { | |
1402 | if (ep == bp || (ep->b_flags & B_INVAL) || | |
fcd4f15a | 1403 | ep->b_vp == NULLVP) |
e16fa59e KM |
1404 | continue; |
1405 | if (VOP_BMAP(ep->b_vp, (daddr_t)0, &vp, (daddr_t)0)) | |
1406 | continue; | |
1407 | if (vp != ip->i_devvp) | |
1408 | continue; | |
1409 | /* look for overlap */ | |
1410 | if (ep->b_bcount == 0 || ep->b_blkno > last || | |
1411 | ep->b_blkno + btodb(ep->b_bcount) <= start) | |
1412 | continue; | |
20aa076b KM |
1413 | vprint("Disk overlap", vp); |
1414 | printf("\tstart %d, end %d overlap start %d, end %d\n", | |
1415 | start, last, ep->b_blkno, | |
1416 | ep->b_blkno + btodb(ep->b_bcount) - 1); | |
4f1ff475 | 1417 | panic("Disk buffer overlap"); |
e16fa59e KM |
1418 | } |
1419 | } | |
4f1ff475 | 1420 | #endif /* DIAGNOSTIC */ |
e16fa59e KM |
1421 | vp = ip->i_devvp; |
1422 | bp->b_dev = vp->v_rdev; | |
20454d5a | 1423 | (*(vp->v_op->vop_strategy))(bp); |
7188ac27 KM |
1424 | return (0); |
1425 | } | |
88a7a62a | 1426 | |
e16fa59e KM |
1427 | /* |
1428 | * Print out the contents of an inode. | |
1429 | */ | |
1430 | ufs_print(vp) | |
1431 | struct vnode *vp; | |
1432 | { | |
1433 | register struct inode *ip = VTOI(vp); | |
1434 | ||
a8f829ed KM |
1435 | printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number, |
1436 | major(ip->i_dev), minor(ip->i_dev)); | |
1437 | #ifdef FIFO | |
1438 | if (vp->v_type == VFIFO) | |
1439 | fifo_printinfo(vp); | |
1440 | #endif /* FIFO */ | |
1441 | printf("%s\n", (ip->i_flag & ILOCKED) ? " (LOCKED)" : ""); | |
96bae3e0 KM |
1442 | if (ip->i_spare0 == 0) |
1443 | return; | |
1444 | printf("\towner pid %d", ip->i_spare0); | |
1445 | if (ip->i_spare1) | |
1446 | printf(" waiting pid %d", ip->i_spare1); | |
1447 | printf("\n"); | |
e16fa59e KM |
1448 | } |
1449 | ||
24a31b70 KM |
1450 | /* |
1451 | * Read wrapper for special devices. | |
1452 | */ | |
1453 | ufsspec_read(vp, uio, ioflag, cred) | |
1454 | struct vnode *vp; | |
1455 | struct uio *uio; | |
1456 | int ioflag; | |
1457 | struct ucred *cred; | |
1458 | { | |
1459 | ||
1460 | /* | |
1461 | * Set access flag. | |
1462 | */ | |
1463 | VTOI(vp)->i_flag |= IACC; | |
1464 | return (spec_read(vp, uio, ioflag, cred)); | |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * Write wrapper for special devices. | |
1469 | */ | |
1470 | ufsspec_write(vp, uio, ioflag, cred) | |
1471 | struct vnode *vp; | |
1472 | struct uio *uio; | |
1473 | int ioflag; | |
1474 | struct ucred *cred; | |
1475 | { | |
1476 | ||
1477 | /* | |
1478 | * Set update and change flags. | |
1479 | */ | |
1480 | VTOI(vp)->i_flag |= IUPD|ICHG; | |
1481 | return (spec_write(vp, uio, ioflag, cred)); | |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * Close wrapper for special devices. | |
1486 | * | |
1487 | * Update the times on the inode then do device close. | |
1488 | */ | |
5b169cb7 | 1489 | ufsspec_close(vp, fflag, cred, p) |
24a31b70 KM |
1490 | struct vnode *vp; |
1491 | int fflag; | |
1492 | struct ucred *cred; | |
5b169cb7 | 1493 | struct proc *p; |
24a31b70 KM |
1494 | { |
1495 | register struct inode *ip = VTOI(vp); | |
1496 | ||
de67eefc | 1497 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) |
24a31b70 | 1498 | ITIMES(ip, &time, &time); |
5b169cb7 | 1499 | return (spec_close(vp, fflag, cred, p)); |
24a31b70 KM |
1500 | } |
1501 | ||
d1c43d7f KM |
1502 | #ifdef FIFO |
1503 | /* | |
1504 | * Read wrapper for fifo's | |
1505 | */ | |
1506 | ufsfifo_read(vp, uio, ioflag, cred) | |
1507 | struct vnode *vp; | |
1508 | struct uio *uio; | |
1509 | int ioflag; | |
1510 | struct ucred *cred; | |
1511 | { | |
1512 | ||
1513 | /* | |
1514 | * Set access flag. | |
1515 | */ | |
1516 | VTOI(vp)->i_flag |= IACC; | |
1517 | return (fifo_read(vp, uio, ioflag, cred)); | |
1518 | } | |
1519 | ||
1520 | /* | |
1521 | * Write wrapper for fifo's. | |
1522 | */ | |
1523 | ufsfifo_write(vp, uio, ioflag, cred) | |
1524 | struct vnode *vp; | |
1525 | struct uio *uio; | |
1526 | int ioflag; | |
1527 | struct ucred *cred; | |
1528 | { | |
1529 | ||
1530 | /* | |
1531 | * Set update and change flags. | |
1532 | */ | |
1533 | VTOI(vp)->i_flag |= IUPD|ICHG; | |
1534 | return (fifo_write(vp, uio, ioflag, cred)); | |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * Close wrapper for fifo's. | |
1539 | * | |
1540 | * Update the times on the inode then do device close. | |
1541 | */ | |
5b169cb7 | 1542 | ufsfifo_close(vp, fflag, cred, p) |
d1c43d7f KM |
1543 | struct vnode *vp; |
1544 | int fflag; | |
1545 | struct ucred *cred; | |
5b169cb7 | 1546 | struct proc *p; |
d1c43d7f KM |
1547 | { |
1548 | register struct inode *ip = VTOI(vp); | |
1549 | ||
1550 | if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED)) | |
1551 | ITIMES(ip, &time, &time); | |
5b169cb7 | 1552 | return (fifo_close(vp, fflag, cred, p)); |
d1c43d7f KM |
1553 | } |
1554 | #endif /* FIFO */ | |
1555 | ||
7188ac27 | 1556 | /* |
36979c87 | 1557 | * Allocate a new inode. |
7188ac27 KM |
1558 | */ |
1559 | maknode(mode, ndp, ipp) | |
1560 | int mode; | |
1561 | register struct nameidata *ndp; | |
1562 | struct inode **ipp; | |
1563 | { | |
1564 | register struct inode *ip; | |
1565 | struct inode *tip; | |
1566 | register struct inode *pdir = VTOI(ndp->ni_dvp); | |
1567 | ino_t ipref; | |
1568 | int error; | |
1569 | ||
655da945 KM |
1570 | #ifdef DIANOSTIC |
1571 | if ((ndp->ni_nameiop & HASBUF) == 0) | |
1572 | panic("maknode: no name"); | |
1573 | #endif | |
7188ac27 | 1574 | *ipp = 0; |
4b61628b KM |
1575 | if ((mode & IFMT) == 0) |
1576 | mode |= IFREG; | |
7188ac27 KM |
1577 | if ((mode & IFMT) == IFDIR) |
1578 | ipref = dirpref(pdir->i_fs); | |
1579 | else | |
1580 | ipref = pdir->i_number; | |
4b61628b | 1581 | if (error = ialloc(pdir, ipref, mode, ndp->ni_cred, &tip)) { |
655da945 | 1582 | free(ndp->ni_pnbuf, M_NAMEI); |
7188ac27 KM |
1583 | iput(pdir); |
1584 | return (error); | |
1585 | } | |
1586 | ip = tip; | |
4b61628b KM |
1587 | ip->i_uid = ndp->ni_cred->cr_uid; |
1588 | ip->i_gid = pdir->i_gid; | |
7188ac27 | 1589 | #ifdef QUOTA |
4b61628b KM |
1590 | if ((error = getinoquota(ip)) || |
1591 | (error = chkiq(ip, 1, ndp->ni_cred, 0))) { | |
655da945 | 1592 | free(ndp->ni_pnbuf, M_NAMEI); |
4b61628b KM |
1593 | ifree(ip, ip->i_number, mode); |
1594 | iput(ip); | |
1595 | iput(pdir); | |
1596 | return (error); | |
1597 | } | |
7188ac27 KM |
1598 | #endif |
1599 | ip->i_flag |= IACC|IUPD|ICHG; | |
7188ac27 KM |
1600 | ip->i_mode = mode; |
1601 | ITOV(ip)->v_type = IFTOVT(mode); /* Rest init'd in iget() */ | |
1602 | ip->i_nlink = 1; | |
7188ac27 KM |
1603 | if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, ndp->ni_cred) && |
1604 | suser(ndp->ni_cred, NULL)) | |
1605 | ip->i_mode &= ~ISGID; | |
7188ac27 KM |
1606 | |
1607 | /* | |
1608 | * Make sure inode goes to disk before directory entry. | |
1609 | */ | |
4b61628b KM |
1610 | if (error = iupdat(ip, &time, &time, 1)) |
1611 | goto bad; | |
394d67a8 | 1612 | if (error = direnter(ip, ndp)) |
4b61628b | 1613 | goto bad; |
655da945 KM |
1614 | if ((ndp->ni_nameiop & SAVESTART) == 0) |
1615 | FREE(ndp->ni_pnbuf, M_NAMEI); | |
394d67a8 | 1616 | iput(pdir); |
7188ac27 KM |
1617 | *ipp = ip; |
1618 | return (0); | |
4b61628b KM |
1619 | |
1620 | bad: | |
1621 | /* | |
1622 | * Write error occurred trying to update the inode | |
1623 | * or the directory so must deallocate the inode. | |
1624 | */ | |
655da945 | 1625 | free(ndp->ni_pnbuf, M_NAMEI); |
394d67a8 | 1626 | iput(pdir); |
4b61628b KM |
1627 | ip->i_nlink = 0; |
1628 | ip->i_flag |= ICHG; | |
1629 | iput(ip); | |
1630 | return (error); | |
88a7a62a | 1631 | } |
0b0bf936 KM |
1632 | |
1633 | /* | |
1634 | * Advisory record locking support | |
1635 | */ | |
1636 | ufs_advlock(vp, id, op, fl, flags) | |
1637 | struct vnode *vp; | |
1638 | caddr_t id; | |
1639 | int op; | |
1640 | register struct flock *fl; | |
1641 | int flags; | |
1642 | { | |
1643 | register struct inode *ip = VTOI(vp); | |
1644 | register struct lockf *lock; | |
1645 | off_t start, end; | |
1646 | int error; | |
1647 | ||
1648 | /* | |
1649 | * Avoid the common case of unlocking when inode has no locks. | |
1650 | */ | |
1651 | if (ip->i_lockf == (struct lockf *)0) { | |
1652 | if (op != F_SETLK) { | |
1653 | fl->l_type = F_UNLCK; | |
1654 | return (0); | |
1655 | } | |
1656 | } | |
1657 | /* | |
1658 | * Convert the flock structure into a start and end. | |
1659 | */ | |
1660 | switch (fl->l_whence) { | |
1661 | ||
1662 | case SEEK_SET: | |
1663 | case SEEK_CUR: | |
1664 | /* | |
1665 | * Caller is responsible for adding any necessary offset | |
1666 | * when SEEK_CUR is used. | |
1667 | */ | |
1668 | start = fl->l_start; | |
1669 | break; | |
1670 | ||
1671 | case SEEK_END: | |
1672 | start = ip->i_size + fl->l_start; | |
1673 | break; | |
1674 | ||
1675 | default: | |
1676 | return (EINVAL); | |
1677 | } | |
1678 | if (start < 0) | |
1679 | return (EINVAL); | |
1680 | if (fl->l_len == 0) | |
1681 | end = -1; | |
1682 | else | |
c412cb68 | 1683 | end = start + fl->l_len - 1; |
0b0bf936 KM |
1684 | /* |
1685 | * Create the lockf structure | |
1686 | */ | |
1687 | MALLOC(lock, struct lockf *, sizeof *lock, M_LOCKF, M_WAITOK); | |
1688 | lock->lf_start = start; | |
1689 | lock->lf_end = end; | |
1690 | lock->lf_id = id; | |
1691 | lock->lf_inode = ip; | |
1692 | lock->lf_type = fl->l_type; | |
1693 | lock->lf_next = (struct lockf *)0; | |
1694 | lock->lf_block = (struct lockf *)0; | |
1695 | lock->lf_flags = flags; | |
1696 | /* | |
1697 | * Do the requested operation. | |
1698 | */ | |
1699 | switch(op) { | |
1700 | case F_SETLK: | |
b9fc1077 | 1701 | return (lf_setlock(lock)); |
0b0bf936 KM |
1702 | |
1703 | case F_UNLCK: | |
b9fc1077 KM |
1704 | error = lf_clearlock(lock); |
1705 | FREE(lock, M_LOCKF); | |
1706 | return (error); | |
0b0bf936 KM |
1707 | |
1708 | case F_GETLK: | |
b9fc1077 KM |
1709 | error = lf_getlock(lock, fl); |
1710 | FREE(lock, M_LOCKF); | |
1711 | return (error); | |
0b0bf936 KM |
1712 | |
1713 | default: | |
1714 | free(lock, M_LOCKF); | |
1715 | return (EINVAL); | |
1716 | } | |
1717 | /* NOTREACHED */ | |
1718 | } | |
5b169cb7 KM |
1719 | |
1720 | /* | |
1721 | * Global vfs data structures for ufs | |
1722 | */ | |
1723 | struct vnodeops ufs_vnodeops = { | |
1724 | ufs_lookup, /* lookup */ | |
1725 | ufs_create, /* create */ | |
1726 | ufs_mknod, /* mknod */ | |
1727 | ufs_open, /* open */ | |
1728 | ufs_close, /* close */ | |
1729 | ufs_access, /* access */ | |
1730 | ufs_getattr, /* getattr */ | |
1731 | ufs_setattr, /* setattr */ | |
1732 | ufs_read, /* read */ | |
1733 | ufs_write, /* write */ | |
1734 | ufs_ioctl, /* ioctl */ | |
1735 | ufs_select, /* select */ | |
1736 | ufs_mmap, /* mmap */ | |
1737 | ufs_fsync, /* fsync */ | |
1738 | ufs_seek, /* seek */ | |
1739 | ufs_remove, /* remove */ | |
1740 | ufs_link, /* link */ | |
1741 | ufs_rename, /* rename */ | |
1742 | ufs_mkdir, /* mkdir */ | |
1743 | ufs_rmdir, /* rmdir */ | |
1744 | ufs_symlink, /* symlink */ | |
1745 | ufs_readdir, /* readdir */ | |
1746 | ufs_readlink, /* readlink */ | |
1747 | ufs_abortop, /* abortop */ | |
1748 | ufs_inactive, /* inactive */ | |
1749 | ufs_reclaim, /* reclaim */ | |
1750 | ufs_lock, /* lock */ | |
1751 | ufs_unlock, /* unlock */ | |
1752 | ufs_bmap, /* bmap */ | |
1753 | ufs_strategy, /* strategy */ | |
1754 | ufs_print, /* print */ | |
1755 | ufs_islocked, /* islocked */ | |
1756 | ufs_advlock, /* advlock */ | |
1757 | }; | |
1758 | ||
1759 | struct vnodeops spec_inodeops = { | |
1760 | spec_lookup, /* lookup */ | |
1761 | spec_create, /* create */ | |
1762 | spec_mknod, /* mknod */ | |
1763 | spec_open, /* open */ | |
1764 | ufsspec_close, /* close */ | |
1765 | ufs_access, /* access */ | |
1766 | ufs_getattr, /* getattr */ | |
1767 | ufs_setattr, /* setattr */ | |
1768 | ufsspec_read, /* read */ | |
1769 | ufsspec_write, /* write */ | |
1770 | spec_ioctl, /* ioctl */ | |
1771 | spec_select, /* select */ | |
1772 | spec_mmap, /* mmap */ | |
1773 | spec_fsync, /* fsync */ | |
1774 | spec_seek, /* seek */ | |
1775 | spec_remove, /* remove */ | |
1776 | spec_link, /* link */ | |
1777 | spec_rename, /* rename */ | |
1778 | spec_mkdir, /* mkdir */ | |
1779 | spec_rmdir, /* rmdir */ | |
1780 | spec_symlink, /* symlink */ | |
1781 | spec_readdir, /* readdir */ | |
1782 | spec_readlink, /* readlink */ | |
1783 | spec_abortop, /* abortop */ | |
1784 | ufs_inactive, /* inactive */ | |
1785 | ufs_reclaim, /* reclaim */ | |
1786 | ufs_lock, /* lock */ | |
1787 | ufs_unlock, /* unlock */ | |
1788 | spec_bmap, /* bmap */ | |
1789 | spec_strategy, /* strategy */ | |
1790 | ufs_print, /* print */ | |
1791 | ufs_islocked, /* islocked */ | |
1792 | spec_advlock, /* advlock */ | |
1793 | }; | |
1794 | ||
1795 | #ifdef FIFO | |
1796 | struct vnodeops fifo_inodeops = { | |
1797 | fifo_lookup, /* lookup */ | |
1798 | fifo_create, /* create */ | |
1799 | fifo_mknod, /* mknod */ | |
1800 | fifo_open, /* open */ | |
1801 | ufsfifo_close, /* close */ | |
1802 | ufs_access, /* access */ | |
1803 | ufs_getattr, /* getattr */ | |
1804 | ufs_setattr, /* setattr */ | |
1805 | ufsfifo_read, /* read */ | |
1806 | ufsfifo_write, /* write */ | |
1807 | fifo_ioctl, /* ioctl */ | |
1808 | fifo_select, /* select */ | |
1809 | fifo_mmap, /* mmap */ | |
1810 | fifo_fsync, /* fsync */ | |
1811 | fifo_seek, /* seek */ | |
1812 | fifo_remove, /* remove */ | |
1813 | fifo_link, /* link */ | |
1814 | fifo_rename, /* rename */ | |
1815 | fifo_mkdir, /* mkdir */ | |
1816 | fifo_rmdir, /* rmdir */ | |
1817 | fifo_symlink, /* symlink */ | |
1818 | fifo_readdir, /* readdir */ | |
1819 | fifo_readlink, /* readlink */ | |
1820 | fifo_abortop, /* abortop */ | |
1821 | ufs_inactive, /* inactive */ | |
1822 | ufs_reclaim, /* reclaim */ | |
1823 | ufs_lock, /* lock */ | |
1824 | ufs_unlock, /* unlock */ | |
1825 | fifo_bmap, /* bmap */ | |
1826 | fifo_strategy, /* strategy */ | |
1827 | ufs_print, /* print */ | |
1828 | ufs_islocked, /* islocked */ | |
1829 | fifo_advlock, /* advlock */ | |
1830 | }; | |
1831 | #endif /* FIFO */ | |
1832 | ||
1833 | enum vtype iftovt_tab[16] = { | |
1834 | VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, | |
1835 | VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, | |
1836 | }; | |
1837 | int vttoif_tab[9] = { | |
1838 | 0, IFREG, IFDIR, IFBLK, IFCHR, IFLNK, IFSOCK, IFIFO, IFMT, | |
1839 | }; |