2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001 Dag-Erling Coïdan Smørgrav
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer
12 * in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include "opt_pseudofs.h"
36 #include <sys/param.h>
37 #include <sys/kernel.h>
38 #include <sys/systm.h>
39 #include <sys/ctype.h>
40 #include <sys/dirent.h>
41 #include <sys/fcntl.h>
42 #include <sys/limits.h>
44 #include <sys/malloc.h>
45 #include <sys/mount.h>
46 #include <sys/mutex.h>
47 #include <sys/namei.h>
51 #include <sys/sysctl.h>
52 #include <sys/vnode.h>
54 #include <fs/pseudofs/pseudofs.h>
55 #include <fs/pseudofs/pseudofs_internal.h>
57 #define KASSERT_PN_IS_DIR(pn) \
58 KASSERT((pn)->pn_type == pfstype_root || \
59 (pn)->pn_type == pfstype_dir || \
60 (pn)->pn_type == pfstype_procdir, \
61 ("%s(): VDIR vnode refers to non-directory pfs_node", __func__))
63 #define KASSERT_PN_IS_FILE(pn) \
64 KASSERT((pn)->pn_type == pfstype_file, \
65 ("%s(): VREG vnode refers to non-file pfs_node", __func__))
67 #define KASSERT_PN_IS_LINK(pn) \
68 KASSERT((pn)->pn_type == pfstype_symlink, \
69 ("%s(): VLNK vnode refers to non-link pfs_node", __func__))
72 * Returns the fileno, adjusted for target pid
75 pn_fileno(struct pfs_node *pn, pid_t pid)
78 KASSERT(pn->pn_fileno > 0,
79 ("%s(): no fileno allocated", __func__));
81 return (pn->pn_fileno * NO_PID + pid);
82 return (pn->pn_fileno);
86 * Returns non-zero if given file is visible to given thread.
89 pfs_visible_proc(struct thread *td, struct pfs_node *pn, struct proc *proc)
96 PROC_LOCK_ASSERT(proc, MA_OWNED);
98 visible = ((proc->p_flag & P_WEXIT) == 0);
100 visible = (p_cansee(td, proc) == 0);
101 if (visible && pn->pn_vis != NULL)
102 visible = pn_vis(td, proc, pn);
109 pfs_visible(struct thread *td, struct pfs_node *pn, pid_t pid,
114 PFS_TRACE(("%s (pid: %d, req: %d)",
115 pn->pn_name, pid, td->td_proc->p_pid));
124 if (pfs_visible_proc(td, pn, proc)) {
136 pfs_lookup_proc(pid_t pid, struct proc **p)
143 if ((proc->p_flag & P_WEXIT) != 0) {
157 pfs_access(struct vop_access_args *va)
159 struct vnode *vn = va->a_vp;
160 struct pfs_vdata *pvd = vn->v_data;
164 PFS_TRACE(("%s", pvd->pvd_pn->pn_name));
167 error = VOP_GETATTR(vn, &vattr, va->a_cred);
170 error = vaccess(vn->v_type, vattr.va_mode, vattr.va_uid,
171 vattr.va_gid, va->a_accmode, va->a_cred, NULL);
176 * Close a file or directory
179 pfs_close(struct vop_close_args *va)
181 struct vnode *vn = va->a_vp;
182 struct pfs_vdata *pvd = vn->v_data;
183 struct pfs_node *pn = pvd->pvd_pn;
187 PFS_TRACE(("%s", pn->pn_name));
188 pfs_assert_not_owned(pn);
191 * Do nothing unless this is the last close and the node has a
192 * last-close handler.
194 if (vrefcnt(vn) > 1 || pn->pn_close == NULL)
197 if (pvd->pvd_pid != NO_PID) {
198 proc = pfind(pvd->pvd_pid);
203 error = pn_close(va->a_td, proc, pn);
212 * Get file attributes
215 pfs_getattr(struct vop_getattr_args *va)
217 struct vnode *vn = va->a_vp;
218 struct pfs_vdata *pvd = vn->v_data;
219 struct pfs_node *pn = pvd->pvd_pn;
220 struct vattr *vap = va->a_vap;
224 PFS_TRACE(("%s", pn->pn_name));
225 pfs_assert_not_owned(pn);
227 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
230 vap->va_type = vn->v_type;
231 vap->va_fileid = pn_fileno(pn, pvd->pvd_pid);
233 vap->va_blocksize = PAGE_SIZE;
234 vap->va_bytes = vap->va_size = 0;
236 vap->va_fsid = vn->v_mount->mnt_stat.f_fsid.val[0];
238 nanotime(&vap->va_ctime);
239 vap->va_atime = vap->va_mtime = vap->va_ctime;
241 switch (pn->pn_type) {
242 case pfstype_procdir:
247 /* compute link count */
253 case pfstype_symlink:
257 printf("shouldn't be here!\n");
263 vap->va_uid = proc->p_ucred->cr_ruid;
264 vap->va_gid = proc->p_ucred->cr_rgid;
270 if (pn->pn_attr != NULL)
271 error = pn_attr(curthread, proc, pn, vap);
283 pfs_ioctl(struct vop_ioctl_args *va)
286 struct pfs_vdata *pvd;
292 vn_lock(vn, LK_SHARED | LK_RETRY);
293 if (VN_IS_DOOMED(vn)) {
300 PFS_TRACE(("%s: %lx", pn->pn_name, va->a_command));
301 pfs_assert_not_owned(pn);
303 if (vn->v_type != VREG) {
307 KASSERT_PN_IS_FILE(pn);
309 if (pn->pn_ioctl == NULL) {
315 * This is necessary because process' privileges may
316 * have changed since the open() call.
318 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc)) {
323 error = pn_ioctl(curthread, proc, pn, va->a_command, va->a_data);
336 pfs_getextattr(struct vop_getextattr_args *va)
338 struct vnode *vn = va->a_vp;
339 struct pfs_vdata *pvd = vn->v_data;
340 struct pfs_node *pn = pvd->pvd_pn;
344 PFS_TRACE(("%s", pn->pn_name));
345 pfs_assert_not_owned(pn);
348 * This is necessary because either process' privileges may
349 * have changed since the open() call.
351 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
354 if (pn->pn_getextattr == NULL)
357 error = pn_getextattr(curthread, proc, pn,
358 va->a_attrnamespace, va->a_name, va->a_uio,
359 va->a_size, va->a_cred);
368 * Convert a vnode to its component name
371 pfs_vptocnp(struct vop_vptocnp_args *ap)
373 struct vnode *vp = ap->a_vp;
374 struct vnode **dvp = ap->a_vpp;
375 struct pfs_vdata *pvd = vp->v_data;
376 struct pfs_node *pd = pvd->pvd_pn;
379 char *buf = ap->a_buf;
380 int *buflen = ap->a_buflen;
381 char pidbuf[PFS_NAMELEN];
382 pid_t pid = pvd->pvd_pid;
383 int len, i, error, locked;
390 if (vp->v_type == VDIR && pd->pn_type == pfstype_root) {
395 } else if (vp->v_type == VDIR && pd->pn_type == pfstype_procdir) {
396 len = snprintf(pidbuf, sizeof(pidbuf), "%d", pid);
402 bcopy(pidbuf, buf + i, len);
404 len = strlen(pd->pn_name);
410 bcopy(pd->pn_name, buf + i, len);
417 error = vfs_busy(mp, 0);
422 * vp is held by caller.
424 locked = VOP_ISLOCKED(vp);
427 error = pfs_vncache_alloc(mp, dvp, pn, pid);
429 vn_lock(vp, locked | LK_RETRY);
436 vn_lock(vp, locked | LK_RETRY);
446 * Look up a file or directory
449 pfs_lookup(struct vop_cachedlookup_args *va)
451 struct vnode *vn = va->a_dvp;
452 struct vnode **vpp = va->a_vpp;
453 struct componentname *cnp = va->a_cnp;
454 struct pfs_vdata *pvd = vn->v_data;
455 struct pfs_node *pd = pvd->pvd_pn;
456 struct pfs_node *pn, *pdn = NULL;
458 pid_t pid = pvd->pvd_pid;
460 int error, i, namelen, visible;
462 PFS_TRACE(("%.*s", (int)cnp->cn_namelen, cnp->cn_nameptr));
463 pfs_assert_not_owned(pd);
465 if (vn->v_type != VDIR)
466 PFS_RETURN (ENOTDIR);
467 KASSERT_PN_IS_DIR(pd);
469 error = VOP_ACCESS(vn, VEXEC, cnp->cn_cred, cnp->cn_thread);
474 * Don't support DELETE or RENAME. CREATE is supported so
475 * that O_CREAT will work, but the lookup will still fail if
476 * the file does not exist.
478 if ((cnp->cn_flags & ISLASTCN) &&
479 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
480 PFS_RETURN (EOPNOTSUPP);
482 /* shortcut: check if the name is too long */
483 if (cnp->cn_namelen >= PFS_NAMELEN)
486 /* check that parent directory is visible... */
487 if (!pfs_visible(curthread, pd, pvd->pvd_pid, NULL))
491 namelen = cnp->cn_namelen;
492 pname = cnp->cn_nameptr;
493 if (namelen == 1 && pname[0] == '.') {
503 if (cnp->cn_flags & ISDOTDOT) {
504 if (pd->pn_type == pfstype_root)
506 error = vfs_busy(mp, MBF_NOWAIT);
510 error = vfs_busy(mp, 0);
511 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
515 if (VN_IS_DOOMED(vn)) {
521 KASSERT(pd->pn_parent != NULL,
522 ("%s(): non-root directory has no parent", __func__));
524 * This one is tricky. Descendents of procdir nodes
525 * inherit their parent's process affinity, but
526 * there's no easy reverse mapping. For simplicity,
527 * we assume that if this node is a procdir, its
528 * parent isn't (which is correct as long as
529 * descendents of procdir nodes are never procdir
532 if (pd->pn_type == pfstype_procdir)
543 for (pn = pd->pn_nodes; pn != NULL; pn = pn->pn_next)
544 if (pn->pn_type == pfstype_procdir)
546 else if (pn->pn_name[namelen] == '\0' &&
547 bcmp(pname, pn->pn_name, namelen) == 0) {
552 /* process dependent node */
553 if ((pn = pdn) != NULL) {
555 for (pid = 0, i = 0; i < namelen && isdigit(pname[i]); ++i)
556 if ((pid = pid * 10 + pname[i] - '0') > PID_MAX)
558 if (i == cnp->cn_namelen) {
569 pfs_assert_not_owned(pd);
570 pfs_assert_not_owned(pn);
571 visible = pfs_visible(curthread, pn, pid, NULL);
577 error = pfs_vncache_alloc(mp, vpp, pn, pid);
581 if (cnp->cn_flags & ISDOTDOT) {
583 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
584 if (VN_IS_DOOMED(vn)) {
590 if (cnp->cn_flags & MAKEENTRY && !VN_IS_DOOMED(vn))
591 cache_enter(vn, *vpp, cnp);
594 if (cnp->cn_flags & ISDOTDOT) {
596 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
603 * Open a file or directory.
606 pfs_open(struct vop_open_args *va)
608 struct vnode *vn = va->a_vp;
609 struct pfs_vdata *pvd = vn->v_data;
610 struct pfs_node *pn = pvd->pvd_pn;
611 int mode = va->a_mode;
613 PFS_TRACE(("%s (mode 0x%x)", pn->pn_name, mode));
614 pfs_assert_not_owned(pn);
616 /* check if the requested mode is permitted */
617 if (((mode & FREAD) && !(mode & PFS_RD)) ||
618 ((mode & FWRITE) && !(mode & PFS_WR)))
621 /* we don't support locking */
622 if ((mode & O_SHLOCK) || (mode & O_EXLOCK))
623 PFS_RETURN (EOPNOTSUPP);
632 pfs_read(struct vop_read_args *va)
634 struct vnode *vn = va->a_vp;
635 struct pfs_vdata *pvd = vn->v_data;
636 struct pfs_node *pn = pvd->pvd_pn;
637 struct uio *uio = va->a_uio;
639 struct sbuf *sb = NULL;
643 PFS_TRACE(("%s", pn->pn_name));
644 pfs_assert_not_owned(pn);
646 if (vn->v_type != VREG)
648 KASSERT_PN_IS_FILE(pn);
650 if (!(pn->pn_flags & PFS_RD))
653 if (pn->pn_fill == NULL)
657 * This is necessary because either process' privileges may
658 * have changed since the open() call.
660 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
668 locked = VOP_ISLOCKED(vn);
671 if (pn->pn_flags & PFS_RAWRD) {
672 PFS_TRACE(("%zd resid", uio->uio_resid));
673 error = pn_fill(curthread, proc, pn, NULL, uio);
674 PFS_TRACE(("%zd resid", uio->uio_resid));
678 if (uio->uio_resid < 0 || uio->uio_offset < 0 ||
679 uio->uio_resid > OFF_MAX - uio->uio_offset) {
683 buflen = uio->uio_offset + uio->uio_resid;
684 if (buflen > MAXPHYS)
687 sb = sbuf_new(sb, NULL, buflen + 1, 0);
693 error = pn_fill(curthread, proc, pn, sb, uio);
701 * XXX: If the buffer overflowed, sbuf_len() will not return
702 * the data length. Then just use the full length because an
703 * overflowed sbuf must be full.
705 if (sbuf_finish(sb) == 0)
706 buflen = sbuf_len(sb);
707 error = uiomove_frombuf(sbuf_data(sb), buflen, uio);
710 vn_lock(vn, locked | LK_RETRY);
718 * Iterate through directory entries
721 pfs_iterate(struct thread *td, struct proc *proc, struct pfs_node *pd,
722 struct pfs_node **pn, struct proc **p)
726 sx_assert(&allproc_lock, SX_SLOCKED);
727 pfs_assert_owned(pd);
732 } else if ((*pn)->pn_type != pfstype_procdir) {
734 *pn = (*pn)->pn_next;
736 if (*pn != NULL && (*pn)->pn_type == pfstype_procdir) {
739 *p = LIST_FIRST(&allproc);
741 *p = LIST_NEXT(*p, p_list);
742 /* out of processes: next node */
744 *pn = (*pn)->pn_next;
753 visible = pfs_visible_proc(td, *pn, *p);
755 } else if (proc != NULL) {
756 visible = pfs_visible_proc(td, *pn, proc);
766 /* Directory entry list */
768 STAILQ_ENTRY(pfsentry) link;
771 STAILQ_HEAD(pfsdirentlist, pfsentry);
774 * Return directory entries.
777 pfs_readdir(struct vop_readdir_args *va)
779 struct vnode *vn = va->a_vp;
780 struct pfs_vdata *pvd = vn->v_data;
781 struct pfs_node *pd = pvd->pvd_pn;
782 pid_t pid = pvd->pvd_pid;
783 struct proc *p, *proc;
786 struct pfsentry *pfsent, *pfsent2;
787 struct pfsdirentlist lst;
793 KASSERT(pd->pn_info == vn->v_mount->mnt_data,
794 ("%s(): pn_info does not match mountpoint", __func__));
795 PFS_TRACE(("%s pid %lu", pd->pn_name, (unsigned long)pid));
796 pfs_assert_not_owned(pd);
798 if (vn->v_type != VDIR)
799 PFS_RETURN (ENOTDIR);
800 KASSERT_PN_IS_DIR(pd);
803 /* only allow reading entire entries */
804 offset = uio->uio_offset;
805 resid = uio->uio_resid;
806 if (offset < 0 || offset % PFS_DELEN != 0 ||
807 (resid && resid < PFS_DELEN))
813 if (pid != NO_PID && !pfs_lookup_proc(pid, &proc))
816 sx_slock(&allproc_lock);
819 KASSERT(pid == NO_PID || proc != NULL,
820 ("%s(): no process for pid %lu", __func__, (unsigned long)pid));
825 /* check if the directory is visible to the caller */
826 if (!pfs_visible_proc(curthread, pd, proc)) {
829 sx_sunlock(&allproc_lock);
835 /* skip unwanted entries */
836 for (pn = NULL, p = NULL; offset > 0; offset -= PFS_DELEN) {
837 if (pfs_iterate(curthread, proc, pd, &pn, &p) == -1) {
838 /* nothing left... */
844 sx_sunlock(&allproc_lock);
849 /* fill in entries */
850 while (pfs_iterate(curthread, proc, pd, &pn, &p) != -1 &&
851 resid >= PFS_DELEN) {
852 if ((pfsent = malloc(sizeof(struct pfsentry), M_IOV,
853 M_NOWAIT | M_ZERO)) == NULL) {
857 pfsent->entry.d_reclen = PFS_DELEN;
858 pfsent->entry.d_fileno = pn_fileno(pn, pid);
859 /* PFS_DELEN was picked to fit PFS_NAMLEN */
860 for (i = 0; i < PFS_NAMELEN - 1 && pn->pn_name[i] != '\0'; ++i)
861 pfsent->entry.d_name[i] = pn->pn_name[i];
862 pfsent->entry.d_namlen = i;
863 /* NOTE: d_off is the offset of the *next* entry. */
864 pfsent->entry.d_off = offset + PFS_DELEN;
865 switch (pn->pn_type) {
866 case pfstype_procdir:
868 ("reached procdir node with p == NULL"));
869 pfsent->entry.d_namlen = snprintf(pfsent->entry.d_name,
870 PFS_NAMELEN, "%d", p->p_pid);
876 pfsent->entry.d_type = DT_DIR;
879 pfsent->entry.d_type = DT_REG;
881 case pfstype_symlink:
882 pfsent->entry.d_type = DT_LNK;
885 panic("%s has unexpected node type: %d", pn->pn_name, pn->pn_type);
887 PFS_TRACE(("%s", pfsent->entry.d_name));
888 dirent_terminate(&pfsent->entry);
889 STAILQ_INSERT_TAIL(&lst, pfsent, link);
898 sx_sunlock(&allproc_lock);
900 STAILQ_FOREACH_SAFE(pfsent, &lst, link, pfsent2) {
902 error = uiomove(&pfsent->entry, PFS_DELEN, uio);
906 PFS_TRACE(("%ju bytes", (uintmax_t)(i * PFS_DELEN)));
911 * Read a symbolic link
914 pfs_readlink(struct vop_readlink_args *va)
916 struct vnode *vn = va->a_vp;
917 struct pfs_vdata *pvd = vn->v_data;
918 struct pfs_node *pn = pvd->pvd_pn;
919 struct uio *uio = va->a_uio;
920 struct proc *proc = NULL;
925 PFS_TRACE(("%s", pn->pn_name));
926 pfs_assert_not_owned(pn);
928 if (vn->v_type != VLNK)
930 KASSERT_PN_IS_LINK(pn);
932 if (pn->pn_fill == NULL)
935 if (pvd->pvd_pid != NO_PID) {
936 if ((proc = pfind(pvd->pvd_pid)) == NULL)
938 if (proc->p_flag & P_WEXIT) {
946 locked = VOP_ISLOCKED(vn);
949 /* sbuf_new() can't fail with a static buffer */
950 sbuf_new(&sb, buf, sizeof buf, 0);
952 error = pn_fill(curthread, proc, pn, &sb, NULL);
956 vn_lock(vn, locked | LK_RETRY);
964 if (sbuf_finish(&sb) != 0) {
966 PFS_RETURN (ENAMETOOLONG);
969 error = uiomove_frombuf(sbuf_data(&sb), sbuf_len(&sb), uio);
978 pfs_reclaim(struct vop_reclaim_args *va)
980 struct vnode *vn = va->a_vp;
981 struct pfs_vdata *pvd = vn->v_data;
982 struct pfs_node *pn = pvd->pvd_pn;
984 PFS_TRACE(("%s", pn->pn_name));
985 pfs_assert_not_owned(pn);
987 return (pfs_vncache_free(va->a_vp));
994 pfs_setattr(struct vop_setattr_args *va)
996 struct vnode *vn = va->a_vp;
997 struct pfs_vdata *pvd = vn->v_data;
998 struct pfs_node *pn = pvd->pvd_pn;
1000 PFS_TRACE(("%s", pn->pn_name));
1001 pfs_assert_not_owned(pn);
1003 /* Silently ignore unchangeable attributes. */
1011 pfs_write(struct vop_write_args *va)
1013 struct vnode *vn = va->a_vp;
1014 struct pfs_vdata *pvd = vn->v_data;
1015 struct pfs_node *pn = pvd->pvd_pn;
1016 struct uio *uio = va->a_uio;
1021 PFS_TRACE(("%s", pn->pn_name));
1022 pfs_assert_not_owned(pn);
1024 if (vn->v_type != VREG)
1025 PFS_RETURN (EINVAL);
1026 KASSERT_PN_IS_FILE(pn);
1028 if (!(pn->pn_flags & PFS_WR))
1031 if (pn->pn_fill == NULL)
1035 * This is necessary because either process' privileges may
1036 * have changed since the open() call.
1038 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
1045 if (pn->pn_flags & PFS_RAWWR) {
1046 error = pn_fill(curthread, proc, pn, NULL, uio);
1052 sbuf_uionew(&sb, uio, &error);
1059 error = pn_fill(curthread, proc, pn, &sb, uio);
1070 struct vop_vector pfs_vnodeops = {
1071 .vop_default = &default_vnodeops,
1073 .vop_access = pfs_access,
1074 .vop_cachedlookup = pfs_lookup,
1075 .vop_close = pfs_close,
1076 .vop_create = VOP_EOPNOTSUPP,
1077 .vop_getattr = pfs_getattr,
1078 .vop_getextattr = pfs_getextattr,
1079 .vop_ioctl = pfs_ioctl,
1080 .vop_link = VOP_EOPNOTSUPP,
1081 .vop_lookup = vfs_cache_lookup,
1082 .vop_mkdir = VOP_EOPNOTSUPP,
1083 .vop_mknod = VOP_EOPNOTSUPP,
1084 .vop_open = pfs_open,
1085 .vop_read = pfs_read,
1086 .vop_readdir = pfs_readdir,
1087 .vop_readlink = pfs_readlink,
1088 .vop_reclaim = pfs_reclaim,
1089 .vop_remove = VOP_EOPNOTSUPP,
1090 .vop_rename = VOP_EOPNOTSUPP,
1091 .vop_rmdir = VOP_EOPNOTSUPP,
1092 .vop_setattr = pfs_setattr,
1093 .vop_symlink = VOP_EOPNOTSUPP,
1094 .vop_vptocnp = pfs_vptocnp,
1095 .vop_write = pfs_write,
1096 /* XXX I've probably forgotten a few that need VOP_EOPNOTSUPP */
1098 VFS_VOP_VECTOR_REGISTER(pfs_vnodeops);