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38 * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95
39 * $FreeBSD: src/sys/ufs/ufs/ufs_vnops.c,v 1.131.2.8 2003/01/02 17:26:19 bde Exp $
40 * $DragonFly: src/sys/vfs/ufs/ufs_vnops.c,v 1.60 2007/05/09 00:53:36 dillon Exp $
43 #include "opt_quota.h"
44 #include "opt_suiddir.h"
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/kernel.h>
50 #include <sys/fcntl.h>
54 #include <sys/namei.h>
55 #include <sys/mount.h>
56 #include <sys/unistd.h>
57 #include <sys/vnode.h>
58 #include <sys/malloc.h>
59 #include <sys/dirent.h>
60 #include <sys/lockf.h>
61 #include <sys/event.h>
64 #include <sys/file.h> /* XXX */
68 #include <vm/vm_extern.h>
70 #include <vfs/fifofs/fifo.h>
76 #include "ufs_extern.h"
77 #include "ffs_extern.h"
82 static int ufs_access (struct vop_access_args *);
83 static int ufs_advlock (struct vop_advlock_args *);
84 static int ufs_chmod (struct vnode *, int, struct ucred *);
85 static int ufs_chown (struct vnode *, uid_t, gid_t, struct ucred *);
86 static int ufs_close (struct vop_close_args *);
87 static int ufs_create (struct vop_old_create_args *);
88 static int ufs_getattr (struct vop_getattr_args *);
89 static int ufs_link (struct vop_old_link_args *);
90 static int ufs_makeinode (int mode, struct vnode *, struct vnode **, struct componentname *);
91 static int ufs_missingop (struct vop_generic_args *ap);
92 static int ufs_mkdir (struct vop_old_mkdir_args *);
93 static int ufs_mknod (struct vop_old_mknod_args *);
94 static int ufs_mmap (struct vop_mmap_args *);
95 static int ufs_open (struct vop_open_args *);
96 static int ufs_pathconf (struct vop_pathconf_args *);
97 static int ufs_print (struct vop_print_args *);
98 static int ufs_readdir (struct vop_readdir_args *);
99 static int ufs_readlink (struct vop_readlink_args *);
100 static int ufs_remove (struct vop_old_remove_args *);
101 static int ufs_rename (struct vop_old_rename_args *);
102 static int ufs_rmdir (struct vop_old_rmdir_args *);
103 static int ufs_setattr (struct vop_setattr_args *);
104 static int ufs_strategy (struct vop_strategy_args *);
105 static int ufs_symlink (struct vop_old_symlink_args *);
106 static int ufs_whiteout (struct vop_old_whiteout_args *);
107 static int ufsfifo_close (struct vop_close_args *);
108 static int ufsfifo_kqfilter (struct vop_kqfilter_args *);
109 static int ufsfifo_read (struct vop_read_args *);
110 static int ufsfifo_write (struct vop_write_args *);
111 static int ufsspec_close (struct vop_close_args *);
112 static int ufsspec_read (struct vop_read_args *);
113 static int ufsspec_write (struct vop_write_args *);
114 static int filt_ufsread (struct knote *kn, long hint);
115 static int filt_ufswrite (struct knote *kn, long hint);
116 static int filt_ufsvnode (struct knote *kn, long hint);
117 static void filt_ufsdetach (struct knote *kn);
118 static int ufs_kqfilter (struct vop_kqfilter_args *ap);
124 #define SETHIGH(q, h) { \
127 tmp.val[_QUAD_HIGHWORD] = (h); \
130 #define SETLOW(q, l) { \
133 tmp.val[_QUAD_LOWWORD] = (l); \
136 #define VN_KNOTE(vp, b) \
137 KNOTE(&vp->v_pollinfo.vpi_selinfo.si_note, (b))
139 #define OFSFMT(vp) ((vp)->v_mount->mnt_maxsymlinklen <= 0)
142 * A virgin directory (no blushing please).
144 static struct dirtemplate mastertemplate = {
145 0, 12, DT_DIR, 1, ".",
146 0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
148 static struct odirtemplate omastertemplate = {
150 0, DIRBLKSIZ - 12, 2, ".."
154 ufs_itimes(struct vnode *vp)
160 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0)
162 if ((vp->v_type == VBLK || vp->v_type == VCHR) && !DOINGSOFTDEP(vp))
163 ip->i_flag |= IN_LAZYMOD;
165 ip->i_flag |= IN_MODIFIED;
166 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
168 if (ip->i_flag & IN_ACCESS) {
169 ip->i_atime = ts.tv_sec;
170 ip->i_atimensec = ts.tv_nsec;
172 if (ip->i_flag & IN_UPDATE) {
173 ip->i_mtime = ts.tv_sec;
174 ip->i_mtimensec = ts.tv_nsec;
177 if (ip->i_flag & IN_CHANGE) {
178 ip->i_ctime = ts.tv_sec;
179 ip->i_ctimensec = ts.tv_nsec;
182 ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);
186 * Create a regular file
188 * ufs_create(struct vnode *a_dvp, struct vnode **a_vpp,
189 * struct componentname *a_cnp, struct vattr *a_vap)
193 ufs_create(struct vop_old_create_args *ap)
198 ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
199 ap->a_dvp, ap->a_vpp, ap->a_cnp);
202 VN_KNOTE(ap->a_dvp, NOTE_WRITE);
209 * ufs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
210 * struct componentname *a_cnp, struct vattr *a_vap)
215 ufs_mknod(struct vop_old_mknod_args *ap)
217 struct vattr *vap = ap->a_vap;
218 struct vnode **vpp = ap->a_vpp;
224 * UFS cannot represent the entire major/minor range supported by
227 if (vap->va_rmajor != VNOVAL &&
228 makeudev(vap->va_rmajor, vap->va_rminor) == NOUDEV) {
232 error = ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
233 ap->a_dvp, vpp, ap->a_cnp);
236 VN_KNOTE(ap->a_dvp, NOTE_WRITE);
238 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
239 if (vap->va_rmajor != VNOVAL) {
241 * Want to be able to use this to make badblock
242 * inodes, so don't truncate the dev number.
244 ip->i_rdev = makeudev(vap->va_rmajor, vap->va_rminor);
247 * Remove inode, then reload it through VFS_VGET so it is
248 * checked to see if it is an alias of an existing entry in
251 (*vpp)->v_type = VNON;
252 ino = ip->i_number; /* Save this before vgone() invalidates ip. */
253 vgone_vxlocked(*vpp);
255 error = VFS_VGET(ap->a_dvp->v_mount, ino, vpp);
268 * ufs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
269 * struct thread *a_td)
274 ufs_open(struct vop_open_args *ap)
276 struct vnode *vp = ap->a_vp;
279 * Files marked append-only must be opened for appending.
281 if ((VTOI(vp)->i_flags & APPEND) &&
282 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) {
286 return (vop_stdopen(ap));
292 * Update the times on the inode.
294 * ufs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
295 * struct thread *a_td)
300 ufs_close(struct vop_close_args *ap)
302 struct vnode *vp = ap->a_vp;
304 if (vp->v_sysref.refcnt > 1)
306 return (vop_stdclose(ap));
310 * ufs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
311 * struct thread *a_td)
315 ufs_access(struct vop_access_args *ap)
317 struct vnode *vp = ap->a_vp;
318 struct inode *ip = VTOI(vp);
319 struct ucred *cred = ap->a_cred;
320 mode_t mask, mode = ap->a_mode;
328 * Disallow write attempts on read-only filesystems;
329 * unless the file is a socket, fifo, or a block or
330 * character device resident on the filesystem.
333 switch (vp->v_type) {
337 if (vp->v_mount->mnt_flag & MNT_RDONLY)
340 if ((error = ufs_getinoquota(ip)) != 0)
349 /* If immutable bit set, nobody gets to write it. */
350 if ((mode & VWRITE) && (ip->i_flags & IMMUTABLE))
353 /* Otherwise, user id 0 always gets access. */
354 if (cred->cr_uid == 0)
359 /* Otherwise, check the owner. */
360 if (cred->cr_uid == ip->i_uid) {
367 return ((ip->i_mode & mask) == mask ? 0 : EACCES);
370 /* Otherwise, check the groups. */
371 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
372 if (ip->i_gid == *gp) {
379 return ((ip->i_mode & mask) == mask ? 0 : EACCES);
382 /* Otherwise, check everyone else. */
389 return ((ip->i_mode & mask) == mask ? 0 : EACCES);
393 * ufs_getattr(struct vnode *a_vp, struct vattr *a_vap,
394 * struct thread *a_td)
399 ufs_getattr(struct vop_getattr_args *ap)
401 struct vnode *vp = ap->a_vp;
402 struct inode *ip = VTOI(vp);
403 struct vattr *vap = ap->a_vap;
406 * This may cause i_fsmid to be updated even if no change (0)
407 * is returned, but we should only write out the inode if non-zero
408 * is returned and if the mount is read-write.
410 if (cache_check_fsmid_vp(vp, &ip->i_fsmid) &&
411 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0
413 ip->i_flag |= IN_LAZYMOD;
418 * Copy from inode table
420 vap->va_fsid = dev2udev(ip->i_dev);
421 vap->va_fileid = ip->i_number;
422 vap->va_mode = ip->i_mode & ~IFMT;
423 vap->va_nlink = VFSTOUFS(vp->v_mount)->um_i_effnlink_valid ?
424 ip->i_effnlink : ip->i_nlink;
425 vap->va_uid = ip->i_uid;
426 vap->va_gid = ip->i_gid;
427 vap->va_rmajor = umajor(ip->i_rdev);
428 vap->va_rminor = uminor(ip->i_rdev);
429 vap->va_size = ip->i_din.di_size;
430 vap->va_atime.tv_sec = ip->i_atime;
431 vap->va_atime.tv_nsec = ip->i_atimensec;
432 vap->va_mtime.tv_sec = ip->i_mtime;
433 vap->va_mtime.tv_nsec = ip->i_mtimensec;
434 vap->va_ctime.tv_sec = ip->i_ctime;
435 vap->va_ctime.tv_nsec = ip->i_ctimensec;
436 vap->va_flags = ip->i_flags;
437 vap->va_gen = ip->i_gen;
438 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
439 vap->va_bytes = dbtob((u_quad_t)ip->i_blocks);
440 vap->va_type = IFTOVT(ip->i_mode);
441 vap->va_filerev = ip->i_modrev;
442 vap->va_fsmid = ip->i_fsmid;
447 * Set attribute vnode op. called from several syscalls
449 * ufs_setattr(struct vnode *a_vp, struct vattr *a_vap,
450 * struct ucred *a_cred, struct thread *a_td)
454 ufs_setattr(struct vop_setattr_args *ap)
456 struct vattr *vap = ap->a_vap;
457 struct vnode *vp = ap->a_vp;
458 struct inode *ip = VTOI(vp);
459 struct ucred *cred = ap->a_cred;
463 * Check for unsettable attributes.
465 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
466 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
467 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) ||
468 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
471 if (vap->va_flags != VNOVAL) {
472 if (vp->v_mount->mnt_flag & MNT_RDONLY)
474 if (cred->cr_uid != ip->i_uid &&
475 (error = suser_cred(cred, PRISON_ROOT)))
478 * Note that a root chflags becomes a user chflags when
479 * we are jailed, unless the jail.chflags_allowed sysctl
482 if (cred->cr_uid == 0 &&
483 (!jailed(cred) || jail_chflags_allowed)) {
485 & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) &&
488 ip->i_flags = vap->va_flags;
491 & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) ||
492 (vap->va_flags & UF_SETTABLE) != vap->va_flags)
494 ip->i_flags &= SF_SETTABLE;
495 ip->i_flags |= (vap->va_flags & UF_SETTABLE);
497 ip->i_flag |= IN_CHANGE;
498 if (vap->va_flags & (IMMUTABLE | APPEND))
501 if (ip->i_flags & (IMMUTABLE | APPEND))
504 * Go through the fields and update iff not VNOVAL.
506 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
507 if (vp->v_mount->mnt_flag & MNT_RDONLY)
509 if ((error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred)) != 0)
512 if (vap->va_size != VNOVAL) {
514 * Disallow write attempts on read-only filesystems;
515 * unless the file is a socket, fifo, or a block or
516 * character device resident on the filesystem.
518 switch (vp->v_type) {
523 if (vp->v_mount->mnt_flag & MNT_RDONLY)
529 if ((error = ffs_truncate(vp, vap->va_size, 0, cred)) != 0)
533 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
534 if (vp->v_mount->mnt_flag & MNT_RDONLY)
536 if (cred->cr_uid != ip->i_uid &&
537 (error = suser_cred(cred, PRISON_ROOT)) &&
538 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
539 (error = VOP_ACCESS(vp, VWRITE, cred))))
541 if (vap->va_atime.tv_sec != VNOVAL)
542 ip->i_flag |= IN_ACCESS;
543 if (vap->va_mtime.tv_sec != VNOVAL)
544 ip->i_flag |= IN_CHANGE | IN_UPDATE;
546 if (vap->va_atime.tv_sec != VNOVAL) {
547 ip->i_atime = vap->va_atime.tv_sec;
548 ip->i_atimensec = vap->va_atime.tv_nsec;
550 if (vap->va_mtime.tv_sec != VNOVAL) {
551 ip->i_mtime = vap->va_mtime.tv_sec;
552 ip->i_mtimensec = vap->va_mtime.tv_nsec;
554 error = ffs_update(vp, 0);
559 if (vap->va_mode != (mode_t)VNOVAL) {
560 if (vp->v_mount->mnt_flag & MNT_RDONLY)
562 error = ufs_chmod(vp, (int)vap->va_mode, cred);
564 VN_KNOTE(vp, NOTE_ATTRIB);
569 * Change the mode on a file.
570 * Inode must be locked before calling.
573 ufs_chmod(struct vnode *vp, int mode, struct ucred *cred)
575 struct inode *ip = VTOI(vp);
578 if (cred->cr_uid != ip->i_uid) {
579 error = suser_cred(cred, PRISON_ROOT);
584 if (vp->v_type != VDIR && (mode & S_ISTXT))
586 if (!groupmember(ip->i_gid, cred) && (mode & ISGID))
589 ip->i_mode &= ~ALLPERMS;
590 ip->i_mode |= (mode & ALLPERMS);
591 ip->i_flag |= IN_CHANGE;
596 * Perform chown operation on inode ip;
597 * inode must be locked prior to call.
600 ufs_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred)
602 struct inode *ip = VTOI(vp);
611 if (uid == (uid_t)VNOVAL)
613 if (gid == (gid_t)VNOVAL)
616 * If we don't own the file, are trying to change the owner
617 * of the file, or are not a member of the target group,
618 * the caller must be superuser or the call fails.
620 if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid ||
621 (gid != ip->i_gid && !(cred->cr_gid == gid ||
622 groupmember((gid_t)gid, cred)))) &&
623 (error = suser_cred(cred, PRISON_ROOT)))
628 if ((error = ufs_getinoquota(ip)) != 0)
631 ufs_dqrele(vp, ip->i_dquot[USRQUOTA]);
632 ip->i_dquot[USRQUOTA] = NODQUOT;
635 ufs_dqrele(vp, ip->i_dquot[GRPQUOTA]);
636 ip->i_dquot[GRPQUOTA] = NODQUOT;
638 change = ip->i_blocks;
639 (void) ufs_chkdq(ip, -change, cred, CHOWN);
640 (void) ufs_chkiq(ip, -1, cred, CHOWN);
641 for (i = 0; i < MAXQUOTAS; i++) {
642 ufs_dqrele(vp, ip->i_dquot[i]);
643 ip->i_dquot[i] = NODQUOT;
649 if ((error = ufs_getinoquota(ip)) == 0) {
651 ufs_dqrele(vp, ip->i_dquot[USRQUOTA]);
652 ip->i_dquot[USRQUOTA] = NODQUOT;
655 ufs_dqrele(vp, ip->i_dquot[GRPQUOTA]);
656 ip->i_dquot[GRPQUOTA] = NODQUOT;
658 if ((error = ufs_chkdq(ip, change, cred, CHOWN)) == 0) {
659 if ((error = ufs_chkiq(ip, 1, cred, CHOWN)) == 0)
662 (void)ufs_chkdq(ip, -change, cred, CHOWN|FORCE);
664 for (i = 0; i < MAXQUOTAS; i++) {
665 ufs_dqrele(vp, ip->i_dquot[i]);
666 ip->i_dquot[i] = NODQUOT;
671 if (ufs_getinoquota(ip) == 0) {
673 ufs_dqrele(vp, ip->i_dquot[USRQUOTA]);
674 ip->i_dquot[USRQUOTA] = NODQUOT;
677 ufs_dqrele(vp, ip->i_dquot[GRPQUOTA]);
678 ip->i_dquot[GRPQUOTA] = NODQUOT;
680 (void) ufs_chkdq(ip, change, cred, FORCE|CHOWN);
681 (void) ufs_chkiq(ip, 1, cred, FORCE|CHOWN);
682 (void) ufs_getinoquota(ip);
686 if (ufs_getinoquota(ip))
687 panic("ufs_chown: lost quota");
689 ip->i_flag |= IN_CHANGE;
690 if (cred->cr_uid != 0 && (ouid != uid || ogid != gid))
691 ip->i_mode &= ~(ISUID | ISGID);
698 * NB Currently unsupported.
700 * ufs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred,
701 * struct thread *a_td)
706 ufs_mmap(struct vop_mmap_args *ap)
712 * ufs_remove(struct vnode *a_dvp, struct vnode *a_vp,
713 * struct componentname *a_cnp)
717 ufs_remove(struct vop_old_remove_args *ap)
720 struct vnode *vp = ap->a_vp;
721 struct vnode *dvp = ap->a_dvp;
725 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
726 (VTOI(dvp)->i_flags & APPEND)) {
730 error = ufs_dirremove(dvp, ip, ap->a_cnp->cn_flags, 0);
731 VN_KNOTE(vp, NOTE_DELETE);
732 VN_KNOTE(dvp, NOTE_WRITE);
740 * ufs_link(struct vnode *a_tdvp, struct vnode *a_vp,
741 * struct componentname *a_cnp)
745 ufs_link(struct vop_old_link_args *ap)
747 struct vnode *vp = ap->a_vp;
748 struct vnode *tdvp = ap->a_tdvp;
749 struct componentname *cnp = ap->a_cnp;
751 struct direct newdir;
754 if (tdvp->v_mount != vp->v_mount) {
758 if (tdvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) {
762 if ((nlink_t)ip->i_nlink >= LINK_MAX) {
766 if (ip->i_flags & (IMMUTABLE | APPEND)) {
772 ip->i_flag |= IN_CHANGE;
773 if (DOINGSOFTDEP(vp))
774 softdep_change_linkcnt(ip);
775 error = ffs_update(vp, !(DOINGSOFTDEP(vp) | DOINGASYNC(vp)));
777 ufs_makedirentry(ip, cnp, &newdir);
778 error = ufs_direnter(tdvp, vp, &newdir, cnp, NULL);
784 ip->i_flag |= IN_CHANGE;
785 if (DOINGSOFTDEP(vp))
786 softdep_change_linkcnt(ip);
792 VN_KNOTE(vp, NOTE_LINK);
793 VN_KNOTE(tdvp, NOTE_WRITE);
798 * whiteout vnode call
800 * ufs_whiteout(struct vnode *a_dvp, struct componentname *a_cnp, int a_flags)
804 ufs_whiteout(struct vop_old_whiteout_args *ap)
806 struct vnode *dvp = ap->a_dvp;
807 struct componentname *cnp = ap->a_cnp;
808 struct direct newdir;
811 switch (ap->a_flags) {
813 /* 4.4 format directories support whiteout operations */
814 if (dvp->v_mount->mnt_maxsymlinklen > 0)
819 /* create a new directory whiteout */
821 if (dvp->v_mount->mnt_maxsymlinklen <= 0)
822 panic("ufs_whiteout: old format filesystem");
826 newdir.d_namlen = cnp->cn_namelen;
827 bcopy(cnp->cn_nameptr, newdir.d_name, (unsigned)cnp->cn_namelen + 1);
828 newdir.d_type = DT_WHT;
829 error = ufs_direnter(dvp, NULL, &newdir, cnp, NULL);
833 /* remove an existing directory whiteout */
835 if (dvp->v_mount->mnt_maxsymlinklen <= 0)
836 panic("ufs_whiteout: old format filesystem");
839 cnp->cn_flags &= ~CNP_DOWHITEOUT;
840 error = ufs_dirremove(dvp, NULL, cnp->cn_flags, 0);
843 panic("ufs_whiteout: unknown op");
849 * Rename system call.
850 * rename("foo", "bar");
853 * link("foo", "bar");
855 * but ``atomically''. Can't do full commit without saving state in the
856 * inode on disk which isn't feasible at this time. Best we can do is
857 * always guarantee the target exists.
859 * Basic algorithm is:
861 * 1) Bump link count on source while we're linking it to the
862 * target. This also ensure the inode won't be deleted out
863 * from underneath us while we work (it may be truncated by
864 * a concurrent `trunc' or `open' for creation).
865 * 2) Link source to destination. If destination already exists,
867 * 3) Unlink source reference to inode if still around. If a
868 * directory was moved and the parent of the destination
869 * is different from the source, patch the ".." entry in the
872 * ufs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
873 * struct componentname *a_fcnp, struct vnode *a_tdvp,
874 * struct vnode *a_tvp, struct componentname *a_tcnp)
878 ufs_rename(struct vop_old_rename_args *ap)
880 struct vnode *tvp = ap->a_tvp;
881 struct vnode *tdvp = ap->a_tdvp;
882 struct vnode *fvp = ap->a_fvp;
883 struct vnode *fdvp = ap->a_fdvp;
884 struct componentname *tcnp = ap->a_tcnp;
885 struct componentname *fcnp = ap->a_fcnp;
886 struct inode *ip, *xp, *dp;
887 struct direct newdir;
888 ino_t oldparent = 0, newparent = 0;
889 int doingdirectory = 0;
890 int error = 0, ioflag;
893 * Check for cross-device rename.
895 if ((fvp->v_mount != tdvp->v_mount) ||
896 (tvp && (fvp->v_mount != tvp->v_mount))) {
910 if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
911 (VTOI(tdvp)->i_flags & APPEND))) {
917 * Renaming a file to itself has no effect. The upper layers should
918 * not call us in that case. Temporarily just warn if they do.
921 kprintf("ufs_rename: fvp == tvp (can't happen)\n");
926 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0)
930 * Note: now that fvp is locked we have to be sure to unlock it before
931 * using the 'abortit' target.
935 if (ip->i_nlink >= LINK_MAX) {
940 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))
941 || (dp->i_flags & APPEND)) {
946 if ((ip->i_mode & IFMT) == IFDIR) {
948 * Avoid ".", "..", and aliases of "." for obvious reasons.
950 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
951 dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & CNP_ISDOTDOT ||
952 (ip->i_flag & IN_RENAME)) {
957 ip->i_flag |= IN_RENAME;
958 oldparent = dp->i_number;
961 VN_KNOTE(fdvp, NOTE_WRITE); /* XXX right place? */
964 * fvp still locked. ip->i_flag has IN_RENAME set if doingdirectory.
965 * Cleanup fvp requirements so we can unlock it.
967 * tvp and tdvp are locked. tvp may be NULL. Now that dp and xp
968 * is setup we can use the 'bad' target if we unlock fvp. We cannot
969 * use the abortit target anymore because of IN_RENAME.
978 * 1) Bump link count while we're moving stuff
979 * around. If we crash somewhere before
980 * completing our work, the link count
981 * may be wrong, but correctable.
985 ip->i_flag |= IN_CHANGE;
986 if (DOINGSOFTDEP(fvp))
987 softdep_change_linkcnt(ip);
988 if ((error = ffs_update(fvp, !(DOINGSOFTDEP(fvp) |
989 DOINGASYNC(fvp)))) != 0) {
995 * If ".." must be changed (ie the directory gets a new
996 * parent) then the source directory must not be in the
997 * directory heirarchy above the target, as this would
998 * orphan everything below the source directory. Also
999 * the user must have write permission in the source so
1000 * as to be able to change "..". We must repeat the call
1001 * to namei, as the parent directory is unlocked by the
1002 * call to checkpath().
1004 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred);
1008 * We are now back to where we were in that fvp, fdvp are unlocked
1009 * and tvp, tdvp are locked. tvp may be NULL. IN_RENAME may be
1010 * set. Only the bad target or, if we clean up tvp and tdvp, the
1011 * out target, may be used.
1013 if (oldparent != dp->i_number)
1014 newparent = dp->i_number;
1015 if (doingdirectory && newparent) {
1016 if (error) /* write access check above */
1020 * Once we start messing with tvp and tdvp we cannot use the
1021 * 'bad' target, only finish cleaning tdvp and tvp up and
1022 * use the 'out' target.
1024 * This cleans up tvp.
1032 * This is a real mess. ufs_checkpath vput's the target
1033 * directory so retain an extra ref and note that tdvp will
1034 * lose its lock on return. This leaves us with one good
1035 * ref after ufs_checkpath returns.
1038 error = ufs_checkpath(ip, dp, tcnp->cn_cred);
1039 tcnp->cn_flags |= CNP_PDIRUNLOCK;
1046 * relookup no longer messes with tdvp's refs. tdvp must be
1047 * unlocked on entry and will be locked on a successful
1050 error = relookup(tdvp, &tvp, tcnp);
1052 if (tcnp->cn_flags & CNP_PDIRUNLOCK)
1058 KKASSERT((tcnp->cn_flags & CNP_PDIRUNLOCK) == 0);
1065 * We are back to fvp, fdvp unlocked, tvp, tdvp locked. tvp may
1066 * be NULL (xp will also be NULL in that case), and IN_RENAME will
1067 * be set if doingdirectory. This means we can use the 'bad' target
1072 * 2) If target doesn't exist, link the target
1073 * to the source and unlink the source.
1074 * Otherwise, rewrite the target directory
1075 * entry to reference the source inode and
1076 * expunge the original entry's existence.
1079 if (dp->i_dev != ip->i_dev)
1080 panic("ufs_rename: EXDEV");
1082 * Account for ".." in new directory.
1083 * When source and destination have the same
1084 * parent we don't fool with the link count.
1086 if (doingdirectory && newparent) {
1087 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
1093 dp->i_flag |= IN_CHANGE;
1094 if (DOINGSOFTDEP(tdvp))
1095 softdep_change_linkcnt(dp);
1096 error = ffs_update(tdvp, !(DOINGSOFTDEP(tdvp) |
1101 ufs_makedirentry(ip, tcnp, &newdir);
1102 error = ufs_direnter(tdvp, NULL, &newdir, tcnp, NULL);
1104 if (doingdirectory && newparent) {
1107 dp->i_flag |= IN_CHANGE;
1108 if (DOINGSOFTDEP(tdvp))
1109 softdep_change_linkcnt(dp);
1110 (void)ffs_update(tdvp, 1);
1114 VN_KNOTE(tdvp, NOTE_WRITE);
1117 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
1118 panic("ufs_rename: EXDEV");
1120 * Short circuit rename(foo, foo).
1122 if (xp->i_number == ip->i_number)
1123 panic("ufs_rename: same file");
1125 * If the parent directory is "sticky", then the user must
1126 * own the parent directory, or the destination of the rename,
1127 * otherwise the destination may not be changed (except by
1128 * root). This implements append-only directories.
1130 if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
1131 tcnp->cn_cred->cr_uid != dp->i_uid &&
1132 xp->i_uid != tcnp->cn_cred->cr_uid) {
1137 * Target must be empty if a directory and have no links
1138 * to it. Also, ensure source and target are compatible
1139 * (both directories, or both not directories).
1141 * Purge the file or directory being replaced from the
1144 if ((xp->i_mode&IFMT) == IFDIR) {
1145 if ((xp->i_effnlink > 2) ||
1146 !ufs_dirempty(xp, dp->i_number, tcnp->cn_cred)) {
1150 if (!doingdirectory) {
1154 /* cache_purge removed - handled by VFS compat layer */
1155 } else if (doingdirectory == 0) {
1156 /* cache_purge removed - handled by VFS compat layer */
1162 * note: inode passed to ufs_dirrewrite() is 0 for a
1163 * non-directory file rename, 1 for a directory rename
1164 * in the same directory, and > 1 for an inode representing
1165 * the new directory.
1167 error = ufs_dirrewrite(dp, xp, ip->i_number,
1169 (doingdirectory && newparent) ?
1170 newparent : (ino_t)doingdirectory);
1173 if (doingdirectory) {
1176 if (DOINGSOFTDEP(tdvp))
1177 softdep_change_linkcnt(dp);
1180 if (DOINGSOFTDEP(tvp))
1181 softdep_change_linkcnt(xp);
1183 if (doingdirectory && !DOINGSOFTDEP(tvp)) {
1185 * Truncate inode. The only stuff left in the directory
1186 * is "." and "..". The "." reference is inconsequential
1187 * since we are quashing it. We have removed the "."
1188 * reference and the reference in the parent directory,
1189 * but there may be other hard links. The soft
1190 * dependency code will arrange to do these operations
1191 * after the parent directory entry has been deleted on
1192 * disk, so when running with that code we avoid doing
1197 dp->i_flag |= IN_CHANGE;
1200 xp->i_flag |= IN_CHANGE;
1201 ioflag = DOINGASYNC(tvp) ? 0 : IO_SYNC;
1202 error = ffs_truncate(tvp, (off_t)0, ioflag,
1207 VN_KNOTE(tdvp, NOTE_WRITE);
1209 VN_KNOTE(tvp, NOTE_DELETE);
1215 * tvp and tdvp have been cleaned up. only fvp and fdvp (both
1216 * unlocked) remain. We are about to overwrite fvp but we have to
1217 * keep 'ip' intact so we cannot release the old fvp, which is still
1218 * refd and accessible via ap->a_fvp.
1220 * This means we cannot use either 'bad' or 'out' to cleanup any
1225 * 3) Unlink the source.
1227 fcnp->cn_flags &= ~CNP_MODMASK;
1228 fcnp->cn_flags |= CNP_LOCKPARENT;
1229 error = relookup(fdvp, &fvp, fcnp);
1230 if (error || fvp == NULL) {
1232 * From name has disappeared. IN_RENAME will not be set if
1233 * we get past the panic so we don't have to clean it up.
1236 panic("ufs_rename: lost dir entry");
1238 if (fcnp->cn_flags & CNP_PDIRUNLOCK)
1244 KKASSERT((fcnp->cn_flags & CNP_PDIRUNLOCK) == 0);
1247 * fdvp and fvp are locked.
1253 * Ensure that the directory entry still exists and has not
1254 * changed while the new name has been entered. If the source is
1255 * a file then the entry may have been unlinked or renamed. In
1256 * either case there is no further work to be done. If the source
1257 * is a directory then it cannot have been rmdir'ed; the IN_RENAME
1258 * flag ensures that it cannot be moved by another rename or removed
1259 * by a rmdir. Cleanup IN_RENAME.
1263 panic("ufs_rename: lost dir entry");
1266 * If the source is a directory with a
1267 * new parent, the link count of the old
1268 * parent directory must be decremented
1269 * and ".." set to point to the new parent.
1271 if (doingdirectory && newparent) {
1272 xp->i_offset = mastertemplate.dot_reclen;
1273 ufs_dirrewrite(xp, dp, newparent, DT_DIR, 0);
1274 /* cache_purge removed - handled by VFS compat layer */
1276 error = ufs_dirremove(fdvp, xp, fcnp->cn_flags, 0);
1277 xp->i_flag &= ~IN_RENAME;
1280 VN_KNOTE(fvp, NOTE_RENAME);
1292 ip->i_flag &= ~IN_RENAME;
1293 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) {
1296 ip->i_flag |= IN_CHANGE;
1297 ip->i_flag &= ~IN_RENAME;
1298 if (DOINGSOFTDEP(fvp))
1299 softdep_change_linkcnt(ip);
1310 * ufs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1311 * struct componentname *a_cnp, struct vattr *a_vap)
1315 ufs_mkdir(struct vop_old_mkdir_args *ap)
1317 struct vnode *dvp = ap->a_dvp;
1318 struct vattr *vap = ap->a_vap;
1319 struct componentname *cnp = ap->a_cnp;
1320 struct inode *ip, *dp;
1323 struct dirtemplate dirtemplate, *dtp;
1324 struct direct newdir;
1329 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
1333 dmode = vap->va_mode & 0777;
1336 * Must simulate part of ufs_makeinode here to acquire the inode,
1337 * but not have it entered in the parent directory. The entry is
1338 * made later after writing "." and ".." entries.
1340 error = ffs_valloc(dvp, dmode, cnp->cn_cred, &tvp);
1344 ip->i_gid = dp->i_gid;
1348 struct ucred ucred, *ucp;
1352 * If we are hacking owners here, (only do this where told to)
1353 * and we are not giving it TO root, (would subvert quotas)
1354 * then go ahead and give it to the other user.
1355 * The new directory also inherits the SUID bit.
1356 * If user's UID and dir UID are the same,
1357 * 'give it away' so that the SUID is still forced on.
1359 if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
1360 (dp->i_mode & ISUID) && dp->i_uid) {
1362 ip->i_uid = dp->i_uid;
1364 if (dp->i_uid != cnp->cn_cred->cr_uid) {
1366 * Make sure the correct user gets charged
1368 * Make a dummy credential for the victim.
1369 * XXX This seems to never be accessed out of
1370 * our context so a stack variable is ok.
1373 ucred.cr_uid = ip->i_uid;
1374 ucred.cr_ngroups = 1;
1375 ucred.cr_groups[0] = dp->i_gid;
1380 ip->i_uid = cnp->cn_cred->cr_uid;
1382 if ((error = ufs_getinoquota(ip)) ||
1383 (error = ufs_chkiq(ip, 1, ucp, 0))) {
1384 ffs_vfree(tvp, ip->i_number, dmode);
1390 #else /* !SUIDDIR */
1391 ip->i_uid = cnp->cn_cred->cr_uid;
1393 if ((error = ufs_getinoquota(ip)) ||
1394 (error = ufs_chkiq(ip, 1, cnp->cn_cred, 0))) {
1395 ffs_vfree(tvp, ip->i_number, dmode);
1400 #endif /* !SUIDDIR */
1401 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
1403 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
1406 if (DOINGSOFTDEP(tvp))
1407 softdep_change_linkcnt(ip);
1408 if (cnp->cn_flags & CNP_ISWHITEOUT)
1409 ip->i_flags |= UF_OPAQUE;
1412 * Bump link count in parent directory to reflect work done below.
1413 * Should be done before reference is created so cleanup is
1414 * possible if we crash.
1418 dp->i_flag |= IN_CHANGE;
1419 if (DOINGSOFTDEP(dvp))
1420 softdep_change_linkcnt(dp);
1421 error = ffs_update(tvp, !(DOINGSOFTDEP(dvp) | DOINGASYNC(dvp)));
1426 * The vnode must have a VM object in order to issue buffer cache
1429 vinitvmio(tvp, DIRBLKSIZ);
1432 * Initialize directory with "." and ".." from static template.
1434 if (dvp->v_mount->mnt_maxsymlinklen > 0)
1435 dtp = &mastertemplate;
1437 dtp = (struct dirtemplate *)&omastertemplate;
1439 dirtemplate.dot_ino = ip->i_number;
1440 dirtemplate.dotdot_ino = dp->i_number;
1441 vnode_pager_setsize(tvp, DIRBLKSIZ);
1442 error = VOP_BALLOC(tvp, 0LL, DIRBLKSIZ, cnp->cn_cred, B_CLRBUF, &bp);
1445 ip->i_size = DIRBLKSIZ;
1446 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1447 bcopy((caddr_t)&dirtemplate, (caddr_t)bp->b_data, sizeof dirtemplate);
1448 if (DOINGSOFTDEP(tvp)) {
1450 * Ensure that the entire newly allocated block is a
1451 * valid directory so that future growth within the
1452 * block does not have to ensure that the block is
1453 * written before the inode.
1456 while (blkoff < bp->b_bcount) {
1458 (bp->b_data + blkoff))->d_reclen = DIRBLKSIZ;
1459 blkoff += DIRBLKSIZ;
1462 if ((error = ffs_update(tvp, !(DOINGSOFTDEP(tvp) |
1463 DOINGASYNC(tvp)))) != 0) {
1468 * Directory set up, now install its entry in the parent directory.
1470 * If we are not doing soft dependencies, then we must write out the
1471 * buffer containing the new directory body before entering the new
1472 * name in the parent. If we are doing soft dependencies, then the
1473 * buffer containing the new directory body will be passed to and
1474 * released in the soft dependency code after the code has attached
1475 * an appropriate ordering dependency to the buffer which ensures that
1476 * the buffer is written before the new name is written in the parent.
1478 if (DOINGASYNC(dvp))
1480 else if (!DOINGSOFTDEP(dvp) && (error = bwrite(bp)) != 0)
1482 ufs_makedirentry(ip, cnp, &newdir);
1483 error = ufs_direnter(dvp, tvp, &newdir, cnp, bp);
1487 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
1492 dp->i_flag |= IN_CHANGE;
1493 if (DOINGSOFTDEP(dvp))
1494 softdep_change_linkcnt(dp);
1496 * No need to do an explicit VOP_TRUNCATE here, vrele will
1497 * do this for us because we set the link count to 0.
1501 ip->i_flag |= IN_CHANGE;
1502 if (DOINGSOFTDEP(tvp))
1503 softdep_change_linkcnt(ip);
1511 * Rmdir system call.
1513 * ufs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
1514 * struct componentname *a_cnp)
1518 ufs_rmdir(struct vop_old_rmdir_args *ap)
1520 struct vnode *vp = ap->a_vp;
1521 struct vnode *dvp = ap->a_dvp;
1522 struct componentname *cnp = ap->a_cnp;
1523 struct inode *ip, *dp;
1530 * Do not remove a directory that is in the process of being renamed.
1531 * Verify the directory is empty (and valid). Rmdir ".." will not be
1532 * valid since ".." will contain a reference to the current directory
1533 * and thus be non-empty. Do not allow the removal of mounted on
1534 * directories (this can happen when an NFS exported filesystem
1535 * tries to remove a locally mounted on directory).
1538 if (ip->i_flag & IN_RENAME) {
1542 if (ip->i_effnlink != 2 ||
1543 !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) {
1547 if ((dp->i_flags & APPEND)
1548 || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
1553 * Delete reference to directory before purging
1554 * inode. If we crash in between, the directory
1555 * will be reattached to lost+found,
1559 if (DOINGSOFTDEP(vp)) {
1560 softdep_change_linkcnt(dp);
1561 softdep_change_linkcnt(ip);
1563 error = ufs_dirremove(dvp, ip, cnp->cn_flags, 1);
1567 if (DOINGSOFTDEP(vp)) {
1568 softdep_change_linkcnt(dp);
1569 softdep_change_linkcnt(ip);
1573 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
1575 * Truncate inode. The only stuff left in the directory is "." and
1576 * "..". The "." reference is inconsequential since we are quashing
1577 * it. The soft dependency code will arrange to do these operations
1578 * after the parent directory entry has been deleted on disk, so
1579 * when running with that code we avoid doing them now.
1581 if (!DOINGSOFTDEP(vp)) {
1583 dp->i_flag |= IN_CHANGE;
1585 ip->i_flag |= IN_CHANGE;
1586 ioflag = DOINGASYNC(vp) ? 0 : IO_SYNC;
1587 error = ffs_truncate(vp, (off_t)0, ioflag, cnp->cn_cred);
1589 /* cache_purge removed - handled by VFS compat layer */
1591 /* Kill any active hash; i_effnlink == 0, so it will not come back. */
1592 if (ip->i_dirhash != NULL)
1593 ufsdirhash_free(ip);
1596 VN_KNOTE(vp, NOTE_DELETE);
1601 * symlink -- make a symbolic link
1603 * ufs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1604 * struct componentname *a_cnp, struct vattr *a_vap,
1609 ufs_symlink(struct vop_old_symlink_args *ap)
1611 struct vnode *vp, **vpp = ap->a_vpp;
1615 error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
1619 VN_KNOTE(ap->a_dvp, NOTE_WRITE);
1621 len = strlen(ap->a_target);
1622 if (len < vp->v_mount->mnt_maxsymlinklen) {
1624 bcopy(ap->a_target, (char *)ip->i_shortlink, len);
1626 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1629 * Make sure we have a VM object in order to use
1632 if (vp->v_object == NULL)
1634 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
1635 UIO_SYSSPACE, IO_NODELOCKED,
1636 ap->a_cnp->cn_cred, NULL);
1644 * Vnode op for reading directories.
1646 * ufs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
1647 * int *a_eofflag, int *ncookies, u_long **a_cookies)
1651 ufs_readdir(struct vop_readdir_args *ap)
1653 struct uio *uio = ap->a_uio;
1654 struct vnode *vp = ap->a_vp;
1659 int offset; /* offset into buffer cache buffer */
1660 int eoffset; /* end of buffer clipped to file EOF */
1661 int pickup; /* pickup point */
1666 if (uio->uio_offset < 0)
1669 * Guess the number of cookies needed. Make sure we compute at
1670 * least 1, and no more then a reasonable limit.
1672 if (ap->a_ncookies) {
1673 ncookies = uio->uio_resid / 16 + 1;
1674 if (ncookies > 1024)
1676 cookies = kmalloc(ncookies * sizeof(u_long), M_TEMP, M_WAITOK);
1678 ncookies = -1; /* force conditionals below */
1683 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
1689 if (uio->uio_offset >= VTOI(vp)->i_size) {
1692 if (ap->a_ncookies) {
1693 *ap->a_ncookies = cookie_index;
1694 *ap->a_cookies = cookies;
1700 * Loop until we run out of cookies, we run out of user buffer,
1701 * or we hit the directory EOF.
1703 * Always start scans at the beginning of the buffer, don't trust
1704 * the offset supplied by userland.
1706 while ((error = ffs_blkatoff_ra(vp, uio->uio_offset, NULL, &bp, 2)) == 0) {
1707 pickup = (int)(uio->uio_offset - bp->b_loffset);
1710 if (bp->b_loffset + bp->b_bcount > VTOI(vp)->i_size)
1711 eoffset = (int)(VTOI(vp)->i_size - bp->b_loffset);
1713 eoffset = bp->b_bcount;
1715 while (offset < eoffset) {
1716 dp = (struct direct *)(bp->b_data + offset);
1717 if (dp->d_reclen <= 0 || (dp->d_reclen & 3) ||
1718 offset + dp->d_reclen > bp->b_bcount) {
1722 if (offsetof(struct direct, d_name[dp->d_namlen]) > dp->d_reclen) {
1726 if (offset < pickup) {
1727 offset += dp->d_reclen;
1730 #if BYTE_ORDER == LITTLE_ENDIAN
1732 retval = vop_write_dirent(&error, uio,
1733 dp->d_ino, dp->d_namlen, dp->d_type,
1738 retval = vop_write_dirent(&error, uio,
1739 dp->d_ino, dp->d_type, dp->d_namlen,
1745 cookies[cookie_index] =
1746 (u_long)bp->b_loffset + offset;
1749 offset += dp->d_reclen;
1750 if (cookie_index == ncookies)
1755 * This will align the next loop to the beginning of the
1756 * next block, and pickup will calculate to 0.
1758 uio->uio_offset = bp->b_loffset + offset;
1761 if (retval || error || cookie_index == ncookies ||
1762 uio->uio_offset >= VTOI(vp)->i_size) {
1767 *ap->a_eofflag = VTOI(vp)->i_size <= uio->uio_offset;
1770 * Report errors only if we didn't manage to read anything
1772 if (error && cookie_index == 0) {
1774 kfree(cookies, M_TEMP);
1775 *ap->a_ncookies = 0;
1776 *ap->a_cookies = NULL;
1781 *ap->a_ncookies = cookie_index;
1782 *ap->a_cookies = cookies;
1791 * Return target name of a symbolic link
1793 * ufs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1797 ufs_readlink(struct vop_readlink_args *ap)
1799 struct vnode *vp = ap->a_vp;
1800 struct inode *ip = VTOI(vp);
1804 if ((isize < vp->v_mount->mnt_maxsymlinklen) ||
1805 (ip->i_din.di_blocks == 0)) { /* XXX - for old fastlink support */
1806 uiomove((char *)ip->i_shortlink, isize, ap->a_uio);
1811 * Perform the equivalent of an OPEN on vp so we can issue a
1814 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
1818 * Calculate the logical to physical mapping if not done already,
1819 * then call the device strategy routine.
1821 * In order to be able to swap to a file, the VOP_BMAP operation may not
1822 * deadlock on memory. See ufs_bmap() for details.
1824 * ufs_strategy(struct vnode *a_vp, struct bio *a_bio)
1828 ufs_strategy(struct vop_strategy_args *ap)
1830 struct bio *bio = ap->a_bio;
1832 struct buf *bp = bio->bio_buf;
1833 struct vnode *vp = ap->a_vp;
1838 if (vp->v_type == VBLK || vp->v_type == VCHR)
1839 panic("ufs_strategy: spec");
1840 nbio = push_bio(bio);
1841 if (nbio->bio_offset == NOOFFSET) {
1842 error = VOP_BMAP(vp, bio->bio_offset, NULL, &nbio->bio_offset,
1845 bp->b_error = error;
1846 bp->b_flags |= B_ERROR;
1847 /* I/O was never started on nbio, must biodone(bio) */
1851 if (nbio->bio_offset == NOOFFSET)
1854 if (nbio->bio_offset == NOOFFSET) {
1856 * We hit a hole in the file. The buffer has been zero-filled
1857 * so just biodone() it.
1861 vn_strategy(ip->i_devvp, nbio);
1867 * Print out the contents of an inode.
1869 * ufs_print(struct vnode *a_vp)
1873 ufs_print(struct vop_print_args *ap)
1875 struct vnode *vp = ap->a_vp;
1876 struct inode *ip = VTOI(vp);
1878 kprintf("tag VT_UFS, ino %lu, on dev %s (%d, %d)",
1879 (u_long)ip->i_number, devtoname(ip->i_dev), major(ip->i_dev),
1881 if (vp->v_type == VFIFO)
1883 lockmgr_printinfo(&vp->v_lock);
1889 * Read wrapper for special devices.
1891 * ufsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1892 * struct ucred *a_cred)
1896 ufsspec_read(struct vop_read_args *ap)
1903 resid = uio->uio_resid;
1904 error = VOCALL(&spec_vnode_vops, &ap->a_head);
1906 * The inode may have been revoked during the call, so it must not
1907 * be accessed blindly here or in the other wrapper functions.
1909 ip = VTOI(ap->a_vp);
1910 if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0)))
1911 ip->i_flag |= IN_ACCESS;
1916 * Write wrapper for special devices.
1918 * ufsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1919 * struct ucred *a_cred)
1923 ufsspec_write(struct vop_write_args *ap)
1930 resid = uio->uio_resid;
1931 error = VOCALL(&spec_vnode_vops, &ap->a_head);
1932 ip = VTOI(ap->a_vp);
1933 if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0)))
1934 VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
1939 * Close wrapper for special devices.
1941 * Update the times on the inode then do device close.
1943 * ufsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
1944 * struct thread *a_td)
1948 ufsspec_close(struct vop_close_args *ap)
1950 struct vnode *vp = ap->a_vp;
1952 if (vp->v_sysref.refcnt > 1)
1954 return (VOCALL(&spec_vnode_vops, &ap->a_head));
1958 * Read wrapper for fifos.
1960 * ufsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1961 * struct ucred *a_cred)
1965 ufsfifo_read(struct vop_read_args *ap)
1972 resid = uio->uio_resid;
1973 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1974 ip = VTOI(ap->a_vp);
1975 if ((ap->a_vp->v_mount->mnt_flag & MNT_NOATIME) == 0 && ip != NULL &&
1976 (uio->uio_resid != resid || (error == 0 && resid != 0)))
1977 VTOI(ap->a_vp)->i_flag |= IN_ACCESS;
1982 * Write wrapper for fifos.
1984 * ufsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1985 * struct ucred *a_cred)
1989 ufsfifo_write(struct vop_write_args *ap)
1996 resid = uio->uio_resid;
1997 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1998 ip = VTOI(ap->a_vp);
1999 if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0)))
2000 VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
2005 * Close wrapper for fifos.
2007 * Update the times on the inode then do device close.
2009 * ufsfifo_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
2010 * struct thread *a_td)
2014 ufsfifo_close(struct vop_close_args *ap)
2016 struct vnode *vp = ap->a_vp;
2018 if (vp->v_sysref.refcnt > 1)
2020 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
2024 * Kqfilter wrapper for fifos.
2026 * Fall through to ufs kqfilter routines if needed
2030 ufsfifo_kqfilter(struct vop_kqfilter_args *ap)
2034 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2036 error = ufs_kqfilter(ap);
2041 * Return POSIX pathconf information applicable to ufs filesystems.
2043 * ufs_pathconf(struct vnode *a_vp, int a_name, int *a_retval)
2047 ufs_pathconf(struct vop_pathconf_args *ap)
2049 switch (ap->a_name) {
2051 *ap->a_retval = LINK_MAX;
2054 *ap->a_retval = NAME_MAX;
2057 *ap->a_retval = PATH_MAX;
2060 *ap->a_retval = PIPE_BUF;
2062 case _PC_CHOWN_RESTRICTED:
2075 * Advisory record locking support
2077 * ufs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
2082 ufs_advlock(struct vop_advlock_args *ap)
2084 struct inode *ip = VTOI(ap->a_vp);
2086 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size));
2090 * Initialize the vnode associated with a new inode, handle aliased
2093 * Make sure directories have their VM object now rather then later,
2094 * saving us from having to check on all the myrid directory VOPs
2095 * that might be executed without a VOP_OPEN being performed.
2098 ufs_vinit(struct mount *mntp, struct vnode **vpp)
2107 vp->v_type = IFTOVT(ip->i_mode);
2109 switch(vp->v_type) {
2112 vp->v_ops = &mntp->mnt_vn_spec_ops;
2113 addaliasu(vp, umajor(ip->i_rdev), uminor(ip->i_rdev));
2116 vp->v_ops = &mntp->mnt_vn_fifo_ops;
2120 vinitvmio(vp, ip->i_size);
2123 if (ip->i_size >= vp->v_mount->mnt_maxsymlinklen)
2124 vinitvmio(vp, ip->i_size);
2131 if (ip->i_number == ROOTINO)
2132 vp->v_flag |= VROOT;
2134 * Initialize modrev times
2136 getmicrouptime(&tv);
2137 SETHIGH(ip->i_modrev, tv.tv_sec);
2138 SETLOW(ip->i_modrev, tv.tv_usec * 4294);
2144 * Allocate a new inode.
2148 ufs_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
2149 struct componentname *cnp)
2151 struct inode *ip, *pdir;
2152 struct direct newdir;
2158 if ((mode & IFMT) == 0)
2161 error = ffs_valloc(dvp, mode, cnp->cn_cred, &tvp);
2165 ip->i_gid = pdir->i_gid;
2169 struct ucred ucred, *ucp;
2173 * If we are not the owner of the directory,
2174 * and we are hacking owners here, (only do this where told to)
2175 * and we are not giving it TO root, (would subvert quotas)
2176 * then go ahead and give it to the other user.
2177 * Note that this drops off the execute bits for security.
2179 if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
2180 (pdir->i_mode & ISUID) &&
2181 (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) {
2182 ip->i_uid = pdir->i_uid;
2186 * Make sure the correct user gets charged
2188 * Quickly knock up a dummy credential for the victim.
2189 * XXX This seems to never be accessed out of our
2190 * context so a stack variable is ok.
2193 ucred.cr_uid = ip->i_uid;
2194 ucred.cr_ngroups = 1;
2195 ucred.cr_groups[0] = pdir->i_gid;
2199 ip->i_uid = cnp->cn_cred->cr_uid;
2202 if ((error = ufs_getinoquota(ip)) ||
2203 (error = ufs_chkiq(ip, 1, ucp, 0))) {
2204 ffs_vfree(tvp, ip->i_number, mode);
2210 #else /* !SUIDDIR */
2211 ip->i_uid = cnp->cn_cred->cr_uid;
2213 if ((error = ufs_getinoquota(ip)) ||
2214 (error = ufs_chkiq(ip, 1, cnp->cn_cred, 0))) {
2215 ffs_vfree(tvp, ip->i_number, mode);
2220 #endif /* !SUIDDIR */
2221 ip->i_fsmid = cache_getnewfsmid();
2222 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
2224 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
2227 if (DOINGSOFTDEP(tvp))
2228 softdep_change_linkcnt(ip);
2229 if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) &&
2230 suser_cred(cnp->cn_cred, 0)) {
2231 ip->i_mode &= ~ISGID;
2234 if (cnp->cn_flags & CNP_ISWHITEOUT)
2235 ip->i_flags |= UF_OPAQUE;
2238 * Regular files and directories need VM objects. Softlinks do
2239 * not (not immediately anyway).
2241 if (tvp->v_type == VREG || tvp->v_type == VDIR)
2245 * Make sure inode goes to disk before directory entry.
2247 error = ffs_update(tvp, !(DOINGSOFTDEP(tvp) | DOINGASYNC(tvp)));
2250 ufs_makedirentry(ip, cnp, &newdir);
2251 error = ufs_direnter(dvp, tvp, &newdir, cnp, NULL);
2259 * Write error occurred trying to update the inode
2260 * or the directory so must deallocate the inode.
2264 ip->i_flag |= IN_CHANGE;
2265 if (DOINGSOFTDEP(tvp))
2266 softdep_change_linkcnt(ip);
2272 ufs_missingop(struct vop_generic_args *ap)
2274 panic("no vop function for %s in ufs child", ap->a_desc->sd_name);
2275 return (EOPNOTSUPP);
2278 static struct filterops ufsread_filtops =
2279 { 1, NULL, filt_ufsdetach, filt_ufsread };
2280 static struct filterops ufswrite_filtops =
2281 { 1, NULL, filt_ufsdetach, filt_ufswrite };
2282 static struct filterops ufsvnode_filtops =
2283 { 1, NULL, filt_ufsdetach, filt_ufsvnode };
2286 * ufs_kqfilter(struct vnode *a_vp, struct knote *a_kn)
2289 ufs_kqfilter(struct vop_kqfilter_args *ap)
2291 struct vnode *vp = ap->a_vp;
2292 struct knote *kn = ap->a_kn;
2295 switch (kn->kn_filter) {
2297 kn->kn_fop = &ufsread_filtops;
2300 kn->kn_fop = &ufswrite_filtops;
2303 kn->kn_fop = &ufsvnode_filtops;
2309 kn->kn_hook = (caddr_t)vp;
2311 lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token);
2312 SLIST_INSERT_HEAD(&vp->v_pollinfo.vpi_selinfo.si_note, kn, kn_selnext);
2313 lwkt_reltoken(&ilock);
2319 filt_ufsdetach(struct knote *kn)
2321 struct vnode *vp = (struct vnode *)kn->kn_hook;
2324 lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token);
2325 SLIST_REMOVE(&vp->v_pollinfo.vpi_selinfo.si_note,
2326 kn, knote, kn_selnext);
2327 lwkt_reltoken(&ilock);
2332 filt_ufsread(struct knote *kn, long hint)
2334 struct vnode *vp = (struct vnode *)kn->kn_hook;
2335 struct inode *ip = VTOI(vp);
2338 * filesystem is gone, so set the EOF flag and schedule
2339 * the knote for deletion.
2341 if (hint == NOTE_REVOKE) {
2342 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
2346 kn->kn_data = ip->i_size - kn->kn_fp->f_offset;
2347 return (kn->kn_data != 0);
2352 filt_ufswrite(struct knote *kn, long hint)
2355 * filesystem is gone, so set the EOF flag and schedule
2356 * the knote for deletion.
2358 if (hint == NOTE_REVOKE)
2359 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
2366 filt_ufsvnode(struct knote *kn, long hint)
2368 if (kn->kn_sfflags & hint)
2369 kn->kn_fflags |= hint;
2370 if (hint == NOTE_REVOKE) {
2371 kn->kn_flags |= EV_EOF;
2374 return (kn->kn_fflags != 0);
2377 /* Global vfs data structures for ufs. */
2378 static struct vop_ops ufs_vnode_vops = {
2379 .vop_default = vop_defaultop,
2380 .vop_fsync = (void *)ufs_missingop,
2381 .vop_read = (void *)ufs_missingop,
2382 .vop_reallocblks = (void *)ufs_missingop,
2383 .vop_write = (void *)ufs_missingop,
2384 .vop_access = ufs_access,
2385 .vop_advlock = ufs_advlock,
2386 .vop_bmap = ufs_bmap,
2387 .vop_old_lookup = ufs_lookup,
2388 .vop_close = ufs_close,
2389 .vop_old_create = ufs_create,
2390 .vop_getattr = ufs_getattr,
2391 .vop_inactive = ufs_inactive,
2392 .vop_old_link = ufs_link,
2393 .vop_old_mkdir = ufs_mkdir,
2394 .vop_old_mknod = ufs_mknod,
2395 .vop_mmap = ufs_mmap,
2396 .vop_open = ufs_open,
2397 .vop_pathconf = ufs_pathconf,
2398 .vop_poll = vop_stdpoll,
2399 .vop_kqfilter = ufs_kqfilter,
2400 .vop_print = ufs_print,
2401 .vop_readdir = ufs_readdir,
2402 .vop_readlink = ufs_readlink,
2403 .vop_reclaim = ufs_reclaim,
2404 .vop_old_remove = ufs_remove,
2405 .vop_old_rename = ufs_rename,
2406 .vop_old_rmdir = ufs_rmdir,
2407 .vop_setattr = ufs_setattr,
2408 .vop_strategy = ufs_strategy,
2409 .vop_old_symlink = ufs_symlink,
2410 .vop_old_whiteout = ufs_whiteout
2413 static struct vop_ops ufs_spec_vops = {
2414 .vop_default = spec_vnoperate,
2415 .vop_fsync = (void *)ufs_missingop,
2416 .vop_access = ufs_access,
2417 .vop_close = ufsspec_close,
2418 .vop_getattr = ufs_getattr,
2419 .vop_inactive = ufs_inactive,
2420 .vop_print = ufs_print,
2421 .vop_read = ufsspec_read,
2422 .vop_reclaim = ufs_reclaim,
2423 .vop_setattr = ufs_setattr,
2424 .vop_write = ufsspec_write
2427 static struct vop_ops ufs_fifo_vops = {
2428 .vop_default = fifo_vnoperate,
2429 .vop_fsync = (void *)ufs_missingop,
2430 .vop_access = ufs_access,
2431 .vop_close = ufsfifo_close,
2432 .vop_getattr = ufs_getattr,
2433 .vop_inactive = ufs_inactive,
2434 .vop_kqfilter = ufsfifo_kqfilter,
2435 .vop_print = ufs_print,
2436 .vop_read = ufsfifo_read,
2437 .vop_reclaim = ufs_reclaim,
2438 .vop_setattr = ufs_setattr,
2439 .vop_write = ufsfifo_write
2442 VNODEOP_SET(ufs_vnode_vops);
2443 VNODEOP_SET(ufs_spec_vops);
2444 VNODEOP_SET(ufs_fifo_vops);
2450 ufs_vnoperate(struct vop_generic_args *ap)
2452 return (VOCALL(&ufs_vnode_vops, ap));
2456 * ufs_vnoperatefifo()
2459 ufs_vnoperatefifo(struct vop_generic_args *ap)
2461 return (VOCALL(&ufs_fifo_vops, ap));
2465 * ufs_vnoperatespec()
2468 ufs_vnoperatespec(struct vop_generic_args *ap)
2470 return (VOCALL(&ufs_spec_vops, ap));