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)
98 PROC_LOCK_ASSERT(proc, MA_OWNED);
100 visible = ((proc->p_flag & P_WEXIT) == 0);
102 visible = (p_cansee(td, proc) == 0);
103 if (visible && pn->pn_vis != NULL)
104 visible = pn_vis(td, proc, pn);
111 pfs_visible(struct thread *td, struct pfs_node *pn, pid_t pid,
116 PFS_TRACE(("%s (pid: %d, req: %d)",
117 pn->pn_name, pid, td->td_proc->p_pid));
126 if (pfs_visible_proc(td, pn, proc)) {
138 pfs_lookup_proc(pid_t pid, struct proc **p)
145 if ((proc->p_flag & P_WEXIT) != 0) {
159 pfs_access(struct vop_access_args *va)
161 struct vnode *vn = va->a_vp;
162 struct pfs_vdata *pvd = vn->v_data;
166 PFS_TRACE(("%s", pvd->pvd_pn->pn_name));
169 error = VOP_GETATTR(vn, &vattr, va->a_cred);
172 error = vaccess(vn->v_type, vattr.va_mode, vattr.va_uid, vattr.va_gid,
173 va->a_accmode, va->a_cred);
178 * Close a file or directory
181 pfs_close(struct vop_close_args *va)
183 struct vnode *vn = va->a_vp;
184 struct pfs_vdata *pvd = vn->v_data;
185 struct pfs_node *pn = pvd->pvd_pn;
189 PFS_TRACE(("%s", pn->pn_name));
190 pfs_assert_not_owned(pn);
193 * Do nothing unless this is the last close and the node has a
194 * last-close handler.
196 if (vrefcnt(vn) > 1 || pn->pn_close == NULL)
199 if (pvd->pvd_pid != NO_PID) {
200 proc = pfind(pvd->pvd_pid);
205 error = pn_close(va->a_td, proc, pn);
214 * Get file attributes
217 pfs_getattr(struct vop_getattr_args *va)
219 struct vnode *vn = va->a_vp;
220 struct pfs_vdata *pvd = vn->v_data;
221 struct pfs_node *pn = pvd->pvd_pn;
222 struct vattr *vap = va->a_vap;
226 PFS_TRACE(("%s", pn->pn_name));
227 pfs_assert_not_owned(pn);
229 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
232 vap->va_type = vn->v_type;
233 vap->va_fileid = pn_fileno(pn, pvd->pvd_pid);
235 vap->va_blocksize = PAGE_SIZE;
236 vap->va_bytes = vap->va_size = 0;
238 vap->va_fsid = vn->v_mount->mnt_stat.f_fsid.val[0];
240 nanotime(&vap->va_ctime);
241 vap->va_atime = vap->va_mtime = vap->va_ctime;
243 switch (pn->pn_type) {
244 case pfstype_procdir:
249 /* compute link count */
255 case pfstype_symlink:
259 printf("shouldn't be here!\n");
265 vap->va_uid = proc->p_ucred->cr_ruid;
266 vap->va_gid = proc->p_ucred->cr_rgid;
272 if (pn->pn_attr != NULL)
273 error = pn_attr(curthread, proc, pn, vap);
285 pfs_ioctl(struct vop_ioctl_args *va)
288 struct pfs_vdata *pvd;
294 vn_lock(vn, LK_SHARED | LK_RETRY);
295 if (VN_IS_DOOMED(vn)) {
302 PFS_TRACE(("%s: %lx", pn->pn_name, va->a_command));
303 pfs_assert_not_owned(pn);
305 if (vn->v_type != VREG) {
309 KASSERT_PN_IS_FILE(pn);
311 if (pn->pn_ioctl == NULL) {
317 * This is necessary because process' privileges may
318 * have changed since the open() call.
320 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc)) {
325 error = pn_ioctl(curthread, proc, pn, va->a_command, va->a_data);
338 pfs_getextattr(struct vop_getextattr_args *va)
340 struct vnode *vn = va->a_vp;
341 struct pfs_vdata *pvd = vn->v_data;
342 struct pfs_node *pn = pvd->pvd_pn;
346 PFS_TRACE(("%s", pn->pn_name));
347 pfs_assert_not_owned(pn);
350 * This is necessary because either process' privileges may
351 * have changed since the open() call.
353 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
356 if (pn->pn_getextattr == NULL)
359 error = pn_getextattr(curthread, proc, pn,
360 va->a_attrnamespace, va->a_name, va->a_uio,
361 va->a_size, va->a_cred);
370 * Convert a vnode to its component name
373 pfs_vptocnp(struct vop_vptocnp_args *ap)
375 struct vnode *vp = ap->a_vp;
376 struct vnode **dvp = ap->a_vpp;
377 struct pfs_vdata *pvd = vp->v_data;
378 struct pfs_node *pd = pvd->pvd_pn;
381 char *buf = ap->a_buf;
382 size_t *buflen = ap->a_buflen;
383 char pidbuf[PFS_NAMELEN];
384 pid_t pid = pvd->pvd_pid;
385 int len, i, error, locked;
392 if (vp->v_type == VDIR && pd->pn_type == pfstype_root) {
397 } else if (vp->v_type == VDIR && pd->pn_type == pfstype_procdir) {
398 len = snprintf(pidbuf, sizeof(pidbuf), "%d", pid);
404 bcopy(pidbuf, buf + i, len);
406 len = strlen(pd->pn_name);
412 bcopy(pd->pn_name, buf + i, len);
419 error = vfs_busy(mp, 0);
424 * vp is held by caller.
426 locked = VOP_ISLOCKED(vp);
429 error = pfs_vncache_alloc(mp, dvp, pn, pid);
431 vn_lock(vp, locked | LK_RETRY);
438 vn_lock(vp, locked | LK_RETRY);
448 * Look up a file or directory
451 pfs_lookup(struct vop_cachedlookup_args *va)
453 struct vnode *vn = va->a_dvp;
454 struct vnode **vpp = va->a_vpp;
455 struct componentname *cnp = va->a_cnp;
456 struct pfs_vdata *pvd = vn->v_data;
457 struct pfs_node *pd = pvd->pvd_pn;
458 struct pfs_node *pn, *pdn = NULL;
460 pid_t pid = pvd->pvd_pid;
462 int error, i, namelen, visible;
464 PFS_TRACE(("%.*s", (int)cnp->cn_namelen, cnp->cn_nameptr));
465 pfs_assert_not_owned(pd);
467 if (vn->v_type != VDIR)
468 PFS_RETURN (ENOTDIR);
469 KASSERT_PN_IS_DIR(pd);
472 * Don't support DELETE or RENAME. CREATE is supported so
473 * that O_CREAT will work, but the lookup will still fail if
474 * the file does not exist.
476 if ((cnp->cn_flags & ISLASTCN) &&
477 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
478 PFS_RETURN (EOPNOTSUPP);
480 /* shortcut: check if the name is too long */
481 if (cnp->cn_namelen >= PFS_NAMELEN)
484 /* check that parent directory is visible... */
485 if (!pfs_visible(curthread, pd, pvd->pvd_pid, NULL))
489 namelen = cnp->cn_namelen;
490 pname = cnp->cn_nameptr;
491 if (namelen == 1 && pname[0] == '.') {
501 if (cnp->cn_flags & ISDOTDOT) {
502 if (pd->pn_type == pfstype_root)
504 error = vfs_busy(mp, MBF_NOWAIT);
508 error = vfs_busy(mp, 0);
509 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
513 if (VN_IS_DOOMED(vn)) {
519 KASSERT(pd->pn_parent != NULL,
520 ("%s(): non-root directory has no parent", __func__));
522 * This one is tricky. Descendents of procdir nodes
523 * inherit their parent's process affinity, but
524 * there's no easy reverse mapping. For simplicity,
525 * we assume that if this node is a procdir, its
526 * parent isn't (which is correct as long as
527 * descendents of procdir nodes are never procdir
530 if (pd->pn_type == pfstype_procdir)
541 for (pn = pd->pn_nodes; pn != NULL; pn = pn->pn_next)
542 if (pn->pn_type == pfstype_procdir)
544 else if (pn->pn_name[namelen] == '\0' &&
545 bcmp(pname, pn->pn_name, namelen) == 0) {
550 /* process dependent node */
551 if ((pn = pdn) != NULL) {
553 for (pid = 0, i = 0; i < namelen && isdigit(pname[i]); ++i)
554 if ((pid = pid * 10 + pname[i] - '0') > PID_MAX)
556 if (i == cnp->cn_namelen) {
567 pfs_assert_not_owned(pd);
568 pfs_assert_not_owned(pn);
569 visible = pfs_visible(curthread, pn, pid, NULL);
575 error = pfs_vncache_alloc(mp, vpp, pn, pid);
579 if (cnp->cn_flags & ISDOTDOT) {
581 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
582 if (VN_IS_DOOMED(vn)) {
588 if (cnp->cn_flags & MAKEENTRY && !VN_IS_DOOMED(vn))
589 cache_enter(vn, *vpp, cnp);
592 if (cnp->cn_flags & ISDOTDOT) {
594 vn_lock(vn, LK_EXCLUSIVE | LK_RETRY);
601 * Open a file or directory.
604 pfs_open(struct vop_open_args *va)
606 struct vnode *vn = va->a_vp;
607 struct pfs_vdata *pvd = vn->v_data;
608 struct pfs_node *pn = pvd->pvd_pn;
609 int mode = va->a_mode;
611 PFS_TRACE(("%s (mode 0x%x)", pn->pn_name, mode));
612 pfs_assert_not_owned(pn);
614 /* check if the requested mode is permitted */
615 if (((mode & FREAD) && !(mode & PFS_RD)) ||
616 ((mode & FWRITE) && !(mode & PFS_WR)))
619 /* we don't support locking */
620 if ((mode & O_SHLOCK) || (mode & O_EXLOCK))
621 PFS_RETURN (EOPNOTSUPP);
626 struct sbuf_seek_helper {
632 pfs_sbuf_uio_drain(void *arg, const char *data, int len)
634 struct sbuf_seek_helper *ssh;
642 /* Need to discard first uio_offset bytes. */
643 if (ssh->skip_bytes > 0) {
644 if (ssh->skip_bytes >= len) {
645 ssh->skip_bytes -= len;
649 data += ssh->skip_bytes;
650 len -= ssh->skip_bytes;
651 skipped = ssh->skip_bytes;
655 error = uiomove(__DECONST(void *, data), len, uio);
660 * The fill function has more to emit, but the reader is finished.
661 * This is similar to the truncated read case for non-draining PFS
662 * sbufs, and should be handled appropriately in fill-routines.
664 if (uio->uio_resid == 0)
667 return (skipped + len);
674 pfs_read(struct vop_read_args *va)
676 struct vnode *vn = va->a_vp;
677 struct pfs_vdata *pvd = vn->v_data;
678 struct pfs_node *pn = pvd->pvd_pn;
679 struct uio *uio = va->a_uio;
681 struct sbuf *sb = NULL;
683 off_t buflen, buflim;
684 struct sbuf_seek_helper ssh;
686 PFS_TRACE(("%s", pn->pn_name));
687 pfs_assert_not_owned(pn);
689 if (vn->v_type != VREG)
691 KASSERT_PN_IS_FILE(pn);
693 if (!(pn->pn_flags & PFS_RD))
696 if (pn->pn_fill == NULL)
700 * This is necessary because either process' privileges may
701 * have changed since the open() call.
703 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
711 locked = VOP_ISLOCKED(vn);
714 if (pn->pn_flags & PFS_RAWRD) {
715 PFS_TRACE(("%zd resid", uio->uio_resid));
716 error = pn_fill(curthread, proc, pn, NULL, uio);
717 PFS_TRACE(("%zd resid", uio->uio_resid));
721 if (uio->uio_resid < 0 || uio->uio_offset < 0 ||
722 uio->uio_resid > OFF_MAX - uio->uio_offset) {
726 buflen = uio->uio_offset + uio->uio_resid + 1;
727 if (pn->pn_flags & PFS_AUTODRAIN)
729 * We can use a smaller buffer if we can stream output to the
734 buflim = PFS_MAXBUFSIZ;
738 sb = sbuf_new(sb, NULL, buflen, 0);
744 if (pn->pn_flags & PFS_AUTODRAIN) {
745 ssh.skip_bytes = uio->uio_offset;
747 sbuf_set_drain(sb, pfs_sbuf_uio_drain, &ssh);
750 error = pn_fill(curthread, proc, pn, sb, uio);
758 * XXX: If the buffer overflowed, sbuf_len() will not return
759 * the data length. Then just use the full length because an
760 * overflowed sbuf must be full.
762 error = sbuf_finish(sb);
763 if ((pn->pn_flags & PFS_AUTODRAIN)) {
765 * ENOBUFS just indicates early termination of the fill
766 * function as the caller's buffer was already filled. Squash
769 if (uio->uio_resid == 0 && error == ENOBUFS)
773 buflen = sbuf_len(sb);
775 /* The trailing byte is not valid. */
777 error = uiomove_frombuf(sbuf_data(sb), buflen, uio);
781 vn_lock(vn, locked | LK_RETRY);
789 * Iterate through directory entries
792 pfs_iterate(struct thread *td, struct proc *proc, struct pfs_node *pd,
793 struct pfs_node **pn, struct proc **p)
797 sx_assert(&allproc_lock, SX_SLOCKED);
798 pfs_assert_owned(pd);
803 } else if ((*pn)->pn_type != pfstype_procdir) {
805 *pn = (*pn)->pn_next;
807 if (*pn != NULL && (*pn)->pn_type == pfstype_procdir) {
810 *p = LIST_FIRST(&allproc);
812 *p = LIST_NEXT(*p, p_list);
813 /* out of processes: next node */
815 *pn = (*pn)->pn_next;
824 visible = pfs_visible_proc(td, *pn, *p);
826 } else if (proc != NULL) {
827 visible = pfs_visible_proc(td, *pn, proc);
837 /* Directory entry list */
839 STAILQ_ENTRY(pfsentry) link;
842 STAILQ_HEAD(pfsdirentlist, pfsentry);
845 * Return directory entries.
848 pfs_readdir(struct vop_readdir_args *va)
850 struct vnode *vn = va->a_vp;
851 struct pfs_vdata *pvd = vn->v_data;
852 struct pfs_node *pd = pvd->pvd_pn;
853 pid_t pid = pvd->pvd_pid;
854 struct proc *p, *proc;
857 struct pfsentry *pfsent, *pfsent2;
858 struct pfsdirentlist lst;
864 KASSERT(pd->pn_info == vn->v_mount->mnt_data,
865 ("%s(): pn_info does not match mountpoint", __func__));
866 PFS_TRACE(("%s pid %lu", pd->pn_name, (unsigned long)pid));
867 pfs_assert_not_owned(pd);
869 if (vn->v_type != VDIR)
870 PFS_RETURN (ENOTDIR);
871 KASSERT_PN_IS_DIR(pd);
874 /* only allow reading entire entries */
875 offset = uio->uio_offset;
876 resid = uio->uio_resid;
877 if (offset < 0 || offset % PFS_DELEN != 0 ||
878 (resid && resid < PFS_DELEN))
884 if (pid != NO_PID && !pfs_lookup_proc(pid, &proc))
887 sx_slock(&allproc_lock);
890 KASSERT(pid == NO_PID || proc != NULL,
891 ("%s(): no process for pid %lu", __func__, (unsigned long)pid));
896 /* check if the directory is visible to the caller */
897 if (!pfs_visible_proc(curthread, pd, proc)) {
900 sx_sunlock(&allproc_lock);
906 /* skip unwanted entries */
907 for (pn = NULL, p = NULL; offset > 0; offset -= PFS_DELEN) {
908 if (pfs_iterate(curthread, proc, pd, &pn, &p) == -1) {
909 /* nothing left... */
915 sx_sunlock(&allproc_lock);
920 /* fill in entries */
921 while (pfs_iterate(curthread, proc, pd, &pn, &p) != -1 &&
922 resid >= PFS_DELEN) {
923 if ((pfsent = malloc(sizeof(struct pfsentry), M_IOV,
924 M_NOWAIT | M_ZERO)) == NULL) {
928 pfsent->entry.d_reclen = PFS_DELEN;
929 pfsent->entry.d_fileno = pn_fileno(pn, pid);
930 /* PFS_DELEN was picked to fit PFS_NAMLEN */
931 for (i = 0; i < PFS_NAMELEN - 1 && pn->pn_name[i] != '\0'; ++i)
932 pfsent->entry.d_name[i] = pn->pn_name[i];
933 pfsent->entry.d_namlen = i;
934 /* NOTE: d_off is the offset of the *next* entry. */
935 pfsent->entry.d_off = offset + PFS_DELEN;
936 switch (pn->pn_type) {
937 case pfstype_procdir:
939 ("reached procdir node with p == NULL"));
940 pfsent->entry.d_namlen = snprintf(pfsent->entry.d_name,
941 PFS_NAMELEN, "%d", p->p_pid);
947 pfsent->entry.d_type = DT_DIR;
950 pfsent->entry.d_type = DT_REG;
952 case pfstype_symlink:
953 pfsent->entry.d_type = DT_LNK;
956 panic("%s has unexpected node type: %d", pn->pn_name, pn->pn_type);
958 PFS_TRACE(("%s", pfsent->entry.d_name));
959 dirent_terminate(&pfsent->entry);
960 STAILQ_INSERT_TAIL(&lst, pfsent, link);
969 sx_sunlock(&allproc_lock);
971 STAILQ_FOREACH_SAFE(pfsent, &lst, link, pfsent2) {
973 error = uiomove(&pfsent->entry, PFS_DELEN, uio);
977 PFS_TRACE(("%ju bytes", (uintmax_t)(i * PFS_DELEN)));
982 * Read a symbolic link
985 pfs_readlink(struct vop_readlink_args *va)
987 struct vnode *vn = va->a_vp;
988 struct pfs_vdata *pvd = vn->v_data;
989 struct pfs_node *pn = pvd->pvd_pn;
990 struct uio *uio = va->a_uio;
991 struct proc *proc = NULL;
996 PFS_TRACE(("%s", pn->pn_name));
997 pfs_assert_not_owned(pn);
999 if (vn->v_type != VLNK)
1000 PFS_RETURN (EINVAL);
1001 KASSERT_PN_IS_LINK(pn);
1003 if (pn->pn_fill == NULL)
1006 if (pvd->pvd_pid != NO_PID) {
1007 if ((proc = pfind(pvd->pvd_pid)) == NULL)
1009 if (proc->p_flag & P_WEXIT) {
1017 locked = VOP_ISLOCKED(vn);
1020 /* sbuf_new() can't fail with a static buffer */
1021 sbuf_new(&sb, buf, sizeof buf, 0);
1023 error = pn_fill(curthread, proc, pn, &sb, NULL);
1027 vn_lock(vn, locked | LK_RETRY);
1035 if (sbuf_finish(&sb) != 0) {
1037 PFS_RETURN (ENAMETOOLONG);
1040 error = uiomove_frombuf(sbuf_data(&sb), sbuf_len(&sb), uio);
1049 pfs_reclaim(struct vop_reclaim_args *va)
1051 struct vnode *vn = va->a_vp;
1052 struct pfs_vdata *pvd = vn->v_data;
1053 struct pfs_node *pn = pvd->pvd_pn;
1055 PFS_TRACE(("%s", pn->pn_name));
1056 pfs_assert_not_owned(pn);
1058 return (pfs_vncache_free(va->a_vp));
1065 pfs_setattr(struct vop_setattr_args *va)
1067 struct vnode *vn = va->a_vp;
1068 struct pfs_vdata *pvd = vn->v_data;
1069 struct pfs_node *pn = pvd->pvd_pn;
1071 PFS_TRACE(("%s", pn->pn_name));
1072 pfs_assert_not_owned(pn);
1074 /* Silently ignore unchangeable attributes. */
1082 pfs_write(struct vop_write_args *va)
1084 struct vnode *vn = va->a_vp;
1085 struct pfs_vdata *pvd = vn->v_data;
1086 struct pfs_node *pn = pvd->pvd_pn;
1087 struct uio *uio = va->a_uio;
1092 PFS_TRACE(("%s", pn->pn_name));
1093 pfs_assert_not_owned(pn);
1095 if (vn->v_type != VREG)
1096 PFS_RETURN (EINVAL);
1097 KASSERT_PN_IS_FILE(pn);
1099 if (!(pn->pn_flags & PFS_WR))
1102 if (pn->pn_fill == NULL)
1105 if (uio->uio_resid > PFS_MAXBUFSIZ)
1109 * This is necessary because either process' privileges may
1110 * have changed since the open() call.
1112 if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))
1119 if (pn->pn_flags & PFS_RAWWR) {
1120 error = pn_fill(curthread, proc, pn, NULL, uio);
1126 sbuf_uionew(&sb, uio, &error);
1133 error = pn_fill(curthread, proc, pn, &sb, uio);
1144 struct vop_vector pfs_vnodeops = {
1145 .vop_default = &default_vnodeops,
1147 .vop_access = pfs_access,
1148 .vop_cachedlookup = pfs_lookup,
1149 .vop_close = pfs_close,
1150 .vop_create = VOP_EOPNOTSUPP,
1151 .vop_getattr = pfs_getattr,
1152 .vop_getextattr = pfs_getextattr,
1153 .vop_ioctl = pfs_ioctl,
1154 .vop_link = VOP_EOPNOTSUPP,
1155 .vop_lookup = vfs_cache_lookup,
1156 .vop_mkdir = VOP_EOPNOTSUPP,
1157 .vop_mknod = VOP_EOPNOTSUPP,
1158 .vop_open = pfs_open,
1159 .vop_read = pfs_read,
1160 .vop_readdir = pfs_readdir,
1161 .vop_readlink = pfs_readlink,
1162 .vop_reclaim = pfs_reclaim,
1163 .vop_remove = VOP_EOPNOTSUPP,
1164 .vop_rename = VOP_EOPNOTSUPP,
1165 .vop_rmdir = VOP_EOPNOTSUPP,
1166 .vop_setattr = pfs_setattr,
1167 .vop_symlink = VOP_EOPNOTSUPP,
1168 .vop_vptocnp = pfs_vptocnp,
1169 .vop_write = pfs_write,
1170 .vop_add_writecount = vop_stdadd_writecount_nomsync,
1171 /* XXX I've probably forgotten a few that need VOP_EOPNOTSUPP */
1173 VFS_VOP_VECTOR_REGISTER(pfs_vnodeops);