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__))
71 #define PFS_MAXBUFSIZ 1024 * 1024
74 * Returns the fileno, adjusted for target pid
77 pn_fileno(struct pfs_node *pn, pid_t pid)
80 KASSERT(pn->pn_fileno > 0,
81 ("%s(): no fileno allocated", __func__));
83 return (pn->pn_fileno * NO_PID + pid);
84 return (pn->pn_fileno);
88 * Returns non-zero if given file is visible to given thread.
91 pfs_visible_proc(struct thread *td, struct pfs_node *pn, struct proc *proc)
97 PROC_LOCK_ASSERT(proc, MA_OWNED);
99 if ((proc->p_flag & P_WEXIT) != 0)
101 if (p_cansee(td, proc) != 0)
103 return (pn_vis(td, proc, pn));
107 pfs_visible(struct thread *td, struct pfs_node *pn, pid_t pid,
112 PFS_TRACE(("%s (pid: %d, req: %d)",
113 pn->pn_name, pid, td->td_proc->p_pid));
118 PFS_RETURN (pn_vis(td, NULL, pn));
122 if (pfs_visible_proc(td, pn, proc)) {
134 pfs_lookup_proc(pid_t pid, struct proc **p)
141 if ((proc->p_flag & P_WEXIT) != 0) {
155 pfs_access(struct vop_access_args *va)
157 struct vnode *vn = va->a_vp;
158 struct pfs_vdata *pvd = vn->v_data;
162 PFS_TRACE(("%s", pvd->pvd_pn->pn_name));
165 error = VOP_GETATTR(vn, &vattr, va->a_cred);
168 error = vaccess(vn->v_type, vattr.va_mode, vattr.va_uid, vattr.va_gid,
169 va->a_accmode, va->a_cred);
174 * Close a file or directory
177 pfs_close(struct vop_close_args *va)
179 struct vnode *vn = va->a_vp;
180 struct pfs_vdata *pvd = vn->v_data;
181 struct pfs_node *pn = pvd->pvd_pn;
185 PFS_TRACE(("%s", pn->pn_name));
186 pfs_assert_not_owned(pn);
189 * Do nothing unless this is the last close and the node has a
190 * last-close handler.
192 if (vrefcnt(vn) > 1 || pn->pn_close == NULL)
195 if (pvd->pvd_pid != NO_PID) {
196 proc = pfind(pvd->pvd_pid);
201 error = pn_close(va->a_td, proc, pn);
210 * Get file attributes
213 pfs_getattr(struct vop_getattr_args *va)
215 struct vnode *vn = va->a_vp;
216 struct pfs_vdata *pvd = vn->v_data;
217 struct pfs_node *pn = pvd->pvd_pn;
218 struct vattr *vap = va->a_vap;
222 PFS_TRACE(("%s", pn->pn_name));
223 pfs_assert_not_owned(pn);
225 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
228 vap->va_type = vn->v_type;
229 vap->va_fileid = pn_fileno(pn, pvd->pvd_pid);
231 vap->va_blocksize = PAGE_SIZE;
232 vap->va_bytes = vap->va_size = 0;
234 vap->va_fsid = vn->v_mount->mnt_stat.f_fsid.val[0];
236 nanotime(&vap->va_ctime);
237 vap->va_atime = vap->va_mtime = vap->va_ctime;
239 switch (pn->pn_type) {
240 case pfstype_procdir:
245 /* compute link count */
251 case pfstype_symlink:
255 printf("shouldn't be here!\n");
261 vap->va_uid = proc->p_ucred->cr_ruid;
262 vap->va_gid = proc->p_ucred->cr_rgid;
268 if (pn->pn_attr != NULL)
269 error = pn_attr(curthread, proc, pn, vap);
281 pfs_ioctl(struct vop_ioctl_args *va)
284 struct pfs_vdata *pvd;
290 vn_lock(vn, LK_SHARED | LK_RETRY);
291 if (VN_IS_DOOMED(vn)) {
298 PFS_TRACE(("%s: %lx", pn->pn_name, va->a_command));
299 pfs_assert_not_owned(pn);
301 if (vn->v_type != VREG) {
305 KASSERT_PN_IS_FILE(pn);
307 if (pn->pn_ioctl == NULL) {
313 * This is necessary because process' privileges may
314 * have changed since the open() call.
316 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc)) {
321 error = pn_ioctl(curthread, proc, pn, va->a_command, va->a_data);
334 pfs_getextattr(struct vop_getextattr_args *va)
336 struct vnode *vn = va->a_vp;
337 struct pfs_vdata *pvd = vn->v_data;
338 struct pfs_node *pn = pvd->pvd_pn;
342 PFS_TRACE(("%s", pn->pn_name));
343 pfs_assert_not_owned(pn);
346 * This is necessary because either process' privileges may
347 * have changed since the open() call.
349 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
352 if (pn->pn_getextattr == NULL)
355 error = pn_getextattr(curthread, proc, pn,
356 va->a_attrnamespace, va->a_name, va->a_uio,
357 va->a_size, va->a_cred);
366 * Convert a vnode to its component name
369 pfs_vptocnp(struct vop_vptocnp_args *ap)
371 struct vnode *vp = ap->a_vp;
372 struct vnode **dvp = ap->a_vpp;
373 struct pfs_vdata *pvd = vp->v_data;
374 struct pfs_node *pd = pvd->pvd_pn;
377 char *buf = ap->a_buf;
378 size_t *buflen = ap->a_buflen;
379 char pidbuf[PFS_NAMELEN];
380 pid_t pid = pvd->pvd_pid;
381 int len, i, error, locked;
388 if (vp->v_type == VDIR && pd->pn_type == pfstype_root) {
393 } else if (vp->v_type == VDIR && pd->pn_type == pfstype_procdir) {
394 len = snprintf(pidbuf, sizeof(pidbuf), "%d", pid);
400 bcopy(pidbuf, buf + i, len);
402 len = strlen(pd->pn_name);
408 bcopy(pd->pn_name, buf + i, len);
415 error = vfs_busy(mp, 0);
420 * vp is held by caller.
422 locked = VOP_ISLOCKED(vp);
425 error = pfs_vncache_alloc(mp, dvp, pn, pid);
427 vn_lock(vp, locked | LK_RETRY);
434 vn_lock(vp, locked | LK_RETRY);
444 * Look up a file or directory
447 pfs_lookup(struct vop_cachedlookup_args *va)
449 struct vnode *vn = va->a_dvp;
450 struct vnode **vpp = va->a_vpp;
451 struct componentname *cnp = va->a_cnp;
452 struct pfs_vdata *pvd = vn->v_data;
453 struct pfs_node *pd = pvd->pvd_pn;
454 struct pfs_node *pn, *pdn = NULL;
456 pid_t pid = pvd->pvd_pid;
458 int error, i, namelen, visible;
460 PFS_TRACE(("%.*s", (int)cnp->cn_namelen, cnp->cn_nameptr));
461 pfs_assert_not_owned(pd);
463 if (vn->v_type != VDIR)
464 PFS_RETURN (ENOTDIR);
465 KASSERT_PN_IS_DIR(pd);
468 * Don't support DELETE or RENAME. CREATE is supported so
469 * that O_CREAT will work, but the lookup will still fail if
470 * the file does not exist.
472 if ((cnp->cn_flags & ISLASTCN) &&
473 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
474 PFS_RETURN (EOPNOTSUPP);
476 /* shortcut: check if the name is too long */
477 if (cnp->cn_namelen >= PFS_NAMELEN)
480 /* check that parent directory is visible... */
481 if (!pfs_visible(curthread, pd, pvd->pvd_pid, NULL))
485 namelen = cnp->cn_namelen;
486 pname = cnp->cn_nameptr;
487 if (namelen == 1 && pname[0] == '.') {
497 if (cnp->cn_flags & ISDOTDOT) {
498 if (pd->pn_type == pfstype_root)
500 error = vfs_busy(mp, MBF_NOWAIT);
504 error = vfs_busy(mp, 0);
505 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
509 if (VN_IS_DOOMED(vn)) {
515 KASSERT(pd->pn_parent != NULL,
516 ("%s(): non-root directory has no parent", __func__));
518 * This one is tricky. Descendents of procdir nodes
519 * inherit their parent's process affinity, but
520 * there's no easy reverse mapping. For simplicity,
521 * we assume that if this node is a procdir, its
522 * parent isn't (which is correct as long as
523 * descendents of procdir nodes are never procdir
526 if (pd->pn_type == pfstype_procdir)
537 for (pn = pd->pn_nodes; pn != NULL; pn = pn->pn_next)
538 if (pn->pn_type == pfstype_procdir)
540 else if (strncmp(pname, pn->pn_name, namelen) == 0 &&
541 pn->pn_name[namelen] == '\0') {
546 /* process dependent node */
547 if ((pn = pdn) != NULL) {
549 for (pid = 0, i = 0; i < namelen && isdigit(pname[i]); ++i)
550 if ((pid = pid * 10 + pname[i] - '0') > PID_MAX)
552 if (i == cnp->cn_namelen) {
563 pfs_assert_not_owned(pd);
564 pfs_assert_not_owned(pn);
565 visible = pfs_visible(curthread, pn, pid, NULL);
571 error = pfs_vncache_alloc(mp, vpp, pn, pid);
575 if (cnp->cn_flags & ISDOTDOT) {
577 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
578 if (VN_IS_DOOMED(vn)) {
584 if (cnp->cn_flags & MAKEENTRY && !VN_IS_DOOMED(vn))
585 cache_enter(vn, *vpp, cnp);
588 if (cnp->cn_flags & ISDOTDOT) {
590 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
597 * Open a file or directory.
600 pfs_open(struct vop_open_args *va)
602 struct vnode *vn = va->a_vp;
603 struct pfs_vdata *pvd = vn->v_data;
604 struct pfs_node *pn = pvd->pvd_pn;
605 int mode = va->a_mode;
607 PFS_TRACE(("%s (mode 0x%x)", pn->pn_name, mode));
608 pfs_assert_not_owned(pn);
610 /* check if the requested mode is permitted */
611 if (((mode & FREAD) && !(mode & PFS_RD)) ||
612 ((mode & FWRITE) && !(mode & PFS_WR)))
615 /* we don't support locking */
616 if ((mode & O_SHLOCK) || (mode & O_EXLOCK))
617 PFS_RETURN (EOPNOTSUPP);
622 struct sbuf_seek_helper {
628 pfs_sbuf_uio_drain(void *arg, const char *data, int len)
630 struct sbuf_seek_helper *ssh;
638 /* Need to discard first uio_offset bytes. */
639 if (ssh->skip_bytes > 0) {
640 if (ssh->skip_bytes >= len) {
641 ssh->skip_bytes -= len;
645 data += ssh->skip_bytes;
646 len -= ssh->skip_bytes;
647 skipped = ssh->skip_bytes;
651 error = uiomove(__DECONST(void *, data), len, uio);
656 * The fill function has more to emit, but the reader is finished.
657 * This is similar to the truncated read case for non-draining PFS
658 * sbufs, and should be handled appropriately in fill-routines.
660 if (uio->uio_resid == 0)
663 return (skipped + len);
670 pfs_read(struct vop_read_args *va)
672 struct vnode *vn = va->a_vp;
673 struct pfs_vdata *pvd = vn->v_data;
674 struct pfs_node *pn = pvd->pvd_pn;
675 struct uio *uio = va->a_uio;
677 struct sbuf *sb = NULL;
679 off_t buflen, buflim;
680 struct sbuf_seek_helper ssh;
682 PFS_TRACE(("%s", pn->pn_name));
683 pfs_assert_not_owned(pn);
685 if (vn->v_type != VREG)
687 KASSERT_PN_IS_FILE(pn);
689 if (!(pn->pn_flags & PFS_RD))
692 if (pn->pn_fill == NULL)
696 * This is necessary because either process' privileges may
697 * have changed since the open() call.
699 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
707 locked = VOP_ISLOCKED(vn);
710 if (pn->pn_flags & PFS_RAWRD) {
711 PFS_TRACE(("%zd resid", uio->uio_resid));
712 error = pn_fill(curthread, proc, pn, NULL, uio);
713 PFS_TRACE(("%zd resid", uio->uio_resid));
717 if (uio->uio_resid < 0 || uio->uio_offset < 0 ||
718 uio->uio_resid > OFF_MAX - uio->uio_offset) {
722 buflen = uio->uio_offset + uio->uio_resid + 1;
723 if (pn->pn_flags & PFS_AUTODRAIN)
725 * We can use a smaller buffer if we can stream output to the
730 buflim = PFS_MAXBUFSIZ;
734 sb = sbuf_new(sb, NULL, buflen, 0);
740 if (pn->pn_flags & PFS_AUTODRAIN) {
741 ssh.skip_bytes = uio->uio_offset;
743 sbuf_set_drain(sb, pfs_sbuf_uio_drain, &ssh);
746 error = pn_fill(curthread, proc, pn, sb, uio);
754 * XXX: If the buffer overflowed, sbuf_len() will not return
755 * the data length. Then just use the full length because an
756 * overflowed sbuf must be full.
758 error = sbuf_finish(sb);
759 if ((pn->pn_flags & PFS_AUTODRAIN)) {
761 * ENOBUFS just indicates early termination of the fill
762 * function as the caller's buffer was already filled. Squash
765 if (uio->uio_resid == 0 && error == ENOBUFS)
769 buflen = sbuf_len(sb);
771 /* The trailing byte is not valid. */
773 error = uiomove_frombuf(sbuf_data(sb), buflen, uio);
777 vn_lock(vn, locked | LK_RETRY);
785 * Iterate through directory entries
788 pfs_iterate(struct thread *td, struct proc *proc, struct pfs_node *pd,
789 struct pfs_node **pn, struct proc **p)
793 sx_assert(&allproc_lock, SX_SLOCKED);
794 pfs_assert_owned(pd);
799 } else if ((*pn)->pn_type != pfstype_procdir) {
801 *pn = (*pn)->pn_next;
803 if (*pn != NULL && (*pn)->pn_type == pfstype_procdir) {
806 *p = LIST_FIRST(&allproc);
808 *p = LIST_NEXT(*p, p_list);
809 /* out of processes: next node */
811 *pn = (*pn)->pn_next;
820 visible = pfs_visible_proc(td, *pn, *p);
822 } else if (proc != NULL) {
823 visible = pfs_visible_proc(td, *pn, proc);
825 visible = pn_vis(td, NULL, *pn);
833 /* Directory entry list */
835 STAILQ_ENTRY(pfsentry) link;
838 STAILQ_HEAD(pfsdirentlist, pfsentry);
841 * Return directory entries.
844 pfs_readdir(struct vop_readdir_args *va)
846 struct vnode *vn = va->a_vp;
847 struct pfs_vdata *pvd = vn->v_data;
848 struct pfs_node *pd = pvd->pvd_pn;
849 pid_t pid = pvd->pvd_pid;
850 struct proc *p, *proc;
853 struct pfsentry *pfsent, *pfsent2;
854 struct pfsdirentlist lst;
860 KASSERT(pd->pn_info == vn->v_mount->mnt_data,
861 ("%s(): pn_info does not match mountpoint", __func__));
862 PFS_TRACE(("%s pid %lu", pd->pn_name, (unsigned long)pid));
863 pfs_assert_not_owned(pd);
865 if (vn->v_type != VDIR)
866 PFS_RETURN (ENOTDIR);
867 KASSERT_PN_IS_DIR(pd);
870 /* only allow reading entire entries */
871 offset = uio->uio_offset;
872 resid = uio->uio_resid;
873 if (offset < 0 || offset % PFS_DELEN != 0 ||
874 (resid && resid < PFS_DELEN))
880 if (pid != NO_PID && !pfs_lookup_proc(pid, &proc))
883 sx_slock(&allproc_lock);
886 KASSERT(pid == NO_PID || proc != NULL,
887 ("%s(): no process for pid %lu", __func__, (unsigned long)pid));
892 /* check if the directory is visible to the caller */
893 if (!pfs_visible_proc(curthread, pd, proc)) {
897 sx_sunlock(&allproc_lock);
902 /* skip unwanted entries */
903 for (pn = NULL, p = NULL; offset > 0; offset -= PFS_DELEN) {
904 if (pfs_iterate(curthread, proc, pd, &pn, &p) == -1) {
905 /* nothing left... */
911 sx_sunlock(&allproc_lock);
916 /* fill in entries */
917 while (pfs_iterate(curthread, proc, pd, &pn, &p) != -1 &&
918 resid >= PFS_DELEN) {
919 if ((pfsent = malloc(sizeof(struct pfsentry), M_IOV,
920 M_NOWAIT | M_ZERO)) == NULL) {
924 pfsent->entry.d_reclen = PFS_DELEN;
925 pfsent->entry.d_fileno = pn_fileno(pn, pid);
926 /* PFS_DELEN was picked to fit PFS_NAMLEN */
927 for (i = 0; i < PFS_NAMELEN - 1 && pn->pn_name[i] != '\0'; ++i)
928 pfsent->entry.d_name[i] = pn->pn_name[i];
929 pfsent->entry.d_namlen = i;
930 /* NOTE: d_off is the offset of the *next* entry. */
931 pfsent->entry.d_off = offset + PFS_DELEN;
932 switch (pn->pn_type) {
933 case pfstype_procdir:
935 ("reached procdir node with p == NULL"));
936 pfsent->entry.d_namlen = snprintf(pfsent->entry.d_name,
937 PFS_NAMELEN, "%d", p->p_pid);
943 pfsent->entry.d_type = DT_DIR;
946 pfsent->entry.d_type = DT_REG;
948 case pfstype_symlink:
949 pfsent->entry.d_type = DT_LNK;
952 panic("%s has unexpected node type: %d", pn->pn_name, pn->pn_type);
954 PFS_TRACE(("%s", pfsent->entry.d_name));
955 dirent_terminate(&pfsent->entry);
956 STAILQ_INSERT_TAIL(&lst, pfsent, link);
965 sx_sunlock(&allproc_lock);
967 STAILQ_FOREACH_SAFE(pfsent, &lst, link, pfsent2) {
969 error = uiomove(&pfsent->entry, PFS_DELEN, uio);
973 PFS_TRACE(("%ju bytes", (uintmax_t)(i * PFS_DELEN)));
978 * Read a symbolic link
981 pfs_readlink(struct vop_readlink_args *va)
983 struct vnode *vn = va->a_vp;
984 struct pfs_vdata *pvd = vn->v_data;
985 struct pfs_node *pn = pvd->pvd_pn;
986 struct uio *uio = va->a_uio;
987 struct proc *proc = NULL;
992 PFS_TRACE(("%s", pn->pn_name));
993 pfs_assert_not_owned(pn);
995 if (vn->v_type != VLNK)
997 KASSERT_PN_IS_LINK(pn);
999 if (pn->pn_fill == NULL)
1002 if (pvd->pvd_pid != NO_PID) {
1003 if ((proc = pfind(pvd->pvd_pid)) == NULL)
1005 if (proc->p_flag & P_WEXIT) {
1013 locked = VOP_ISLOCKED(vn);
1016 /* sbuf_new() can't fail with a static buffer */
1017 sbuf_new(&sb, buf, sizeof buf, 0);
1019 error = pn_fill(curthread, proc, pn, &sb, NULL);
1023 vn_lock(vn, locked | LK_RETRY);
1031 if (sbuf_finish(&sb) != 0) {
1033 PFS_RETURN (ENAMETOOLONG);
1036 error = uiomove_frombuf(sbuf_data(&sb), sbuf_len(&sb), uio);
1045 pfs_reclaim(struct vop_reclaim_args *va)
1047 struct vnode *vn = va->a_vp;
1048 struct pfs_vdata *pvd = vn->v_data;
1049 struct pfs_node *pn = pvd->pvd_pn;
1051 PFS_TRACE(("%s", pn->pn_name));
1052 pfs_assert_not_owned(pn);
1054 return (pfs_vncache_free(va->a_vp));
1061 pfs_setattr(struct vop_setattr_args *va)
1063 struct vnode *vn = va->a_vp;
1064 struct pfs_vdata *pvd = vn->v_data;
1065 struct pfs_node *pn = pvd->pvd_pn;
1067 PFS_TRACE(("%s", pn->pn_name));
1068 pfs_assert_not_owned(pn);
1070 /* Silently ignore unchangeable attributes. */
1078 pfs_write(struct vop_write_args *va)
1080 struct vnode *vn = va->a_vp;
1081 struct pfs_vdata *pvd = vn->v_data;
1082 struct pfs_node *pn = pvd->pvd_pn;
1083 struct uio *uio = va->a_uio;
1088 PFS_TRACE(("%s", pn->pn_name));
1089 pfs_assert_not_owned(pn);
1091 if (vn->v_type != VREG)
1092 PFS_RETURN (EINVAL);
1093 KASSERT_PN_IS_FILE(pn);
1095 if (!(pn->pn_flags & PFS_WR))
1098 if (pn->pn_fill == NULL)
1101 if (uio->uio_resid > PFS_MAXBUFSIZ)
1105 * This is necessary because either process' privileges may
1106 * have changed since the open() call.
1108 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
1115 if (pn->pn_flags & PFS_RAWWR) {
1116 error = pn_fill(curthread, proc, pn, NULL, uio);
1122 sbuf_uionew(&sb, uio, &error);
1129 error = pn_fill(curthread, proc, pn, &sb, uio);
1140 struct vop_vector pfs_vnodeops = {
1141 .vop_default = &default_vnodeops,
1143 .vop_access = pfs_access,
1144 .vop_cachedlookup = pfs_lookup,
1145 .vop_close = pfs_close,
1146 .vop_create = VOP_EOPNOTSUPP,
1147 .vop_getattr = pfs_getattr,
1148 .vop_getextattr = pfs_getextattr,
1149 .vop_ioctl = pfs_ioctl,
1150 .vop_link = VOP_EOPNOTSUPP,
1151 .vop_lookup = vfs_cache_lookup,
1152 .vop_mkdir = VOP_EOPNOTSUPP,
1153 .vop_mknod = VOP_EOPNOTSUPP,
1154 .vop_open = pfs_open,
1155 .vop_read = pfs_read,
1156 .vop_readdir = pfs_readdir,
1157 .vop_readlink = pfs_readlink,
1158 .vop_reclaim = pfs_reclaim,
1159 .vop_remove = VOP_EOPNOTSUPP,
1160 .vop_rename = VOP_EOPNOTSUPP,
1161 .vop_rmdir = VOP_EOPNOTSUPP,
1162 .vop_setattr = pfs_setattr,
1163 .vop_symlink = VOP_EOPNOTSUPP,
1164 .vop_vptocnp = pfs_vptocnp,
1165 .vop_write = pfs_write,
1166 .vop_add_writecount = vop_stdadd_writecount_nomsync,
1167 /* XXX I've probably forgotten a few that need VOP_EOPNOTSUPP */
1169 VFS_VOP_VECTOR_REGISTER(pfs_vnodeops);