2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed
8 * to Berkeley by John Heidemann of the UCLA Ficus project.
10 * Source: * @(#)i405_init.c 2.10 92/04/27 UCLA Ficus project
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
41 #include <sys/systm.h>
45 #include <sys/event.h>
46 #include <sys/kernel.h>
47 #include <sys/limits.h>
49 #include <sys/lockf.h>
50 #include <sys/malloc.h>
51 #include <sys/mount.h>
52 #include <sys/namei.h>
53 #include <sys/rwlock.h>
54 #include <sys/fcntl.h>
55 #include <sys/unistd.h>
56 #include <sys/vnode.h>
57 #include <sys/dirent.h>
60 #include <security/mac/mac_framework.h>
63 #include <vm/vm_object.h>
64 #include <vm/vm_extern.h>
66 #include <vm/vm_map.h>
67 #include <vm/vm_page.h>
68 #include <vm/vm_pager.h>
69 #include <vm/vnode_pager.h>
71 static int vop_nolookup(struct vop_lookup_args *);
72 static int vop_norename(struct vop_rename_args *);
73 static int vop_nostrategy(struct vop_strategy_args *);
74 static int get_next_dirent(struct vnode *vp, struct dirent **dpp,
75 char *dirbuf, int dirbuflen, off_t *off,
76 char **cpos, int *len, int *eofflag,
78 static int dirent_exists(struct vnode *vp, const char *dirname,
81 #define DIRENT_MINSIZE (sizeof(struct dirent) - (MAXNAMLEN+1) + 4)
83 static int vop_stdis_text(struct vop_is_text_args *ap);
84 static int vop_stdunset_text(struct vop_unset_text_args *ap);
85 static int vop_stdadd_writecount(struct vop_add_writecount_args *ap);
86 static int vop_stdfdatasync(struct vop_fdatasync_args *ap);
87 static int vop_stdgetpages_async(struct vop_getpages_async_args *ap);
90 * This vnode table stores what we want to do if the filesystem doesn't
91 * implement a particular VOP.
93 * If there is no specific entry here, we will return EOPNOTSUPP.
95 * Note that every filesystem has to implement either vop_access
96 * or vop_accessx; failing to do so will result in immediate crash
97 * due to stack overflow, as vop_stdaccess() calls vop_stdaccessx(),
98 * which calls vop_stdaccess() etc.
101 struct vop_vector default_vnodeops = {
103 .vop_bypass = VOP_EOPNOTSUPP,
105 .vop_access = vop_stdaccess,
106 .vop_accessx = vop_stdaccessx,
107 .vop_advise = vop_stdadvise,
108 .vop_advlock = vop_stdadvlock,
109 .vop_advlockasync = vop_stdadvlockasync,
110 .vop_advlockpurge = vop_stdadvlockpurge,
111 .vop_allocate = vop_stdallocate,
112 .vop_bmap = vop_stdbmap,
113 .vop_close = VOP_NULL,
114 .vop_fsync = VOP_NULL,
115 .vop_fdatasync = vop_stdfdatasync,
116 .vop_getpages = vop_stdgetpages,
117 .vop_getpages_async = vop_stdgetpages_async,
118 .vop_getwritemount = vop_stdgetwritemount,
119 .vop_inactive = VOP_NULL,
120 .vop_ioctl = VOP_ENOTTY,
121 .vop_kqfilter = vop_stdkqfilter,
122 .vop_islocked = vop_stdislocked,
123 .vop_lock1 = vop_stdlock,
124 .vop_lookup = vop_nolookup,
125 .vop_open = VOP_NULL,
126 .vop_pathconf = VOP_EINVAL,
127 .vop_poll = vop_nopoll,
128 .vop_putpages = vop_stdputpages,
129 .vop_readlink = VOP_EINVAL,
130 .vop_rename = vop_norename,
131 .vop_revoke = VOP_PANIC,
132 .vop_strategy = vop_nostrategy,
133 .vop_unlock = vop_stdunlock,
134 .vop_vptocnp = vop_stdvptocnp,
135 .vop_vptofh = vop_stdvptofh,
136 .vop_unp_bind = vop_stdunp_bind,
137 .vop_unp_connect = vop_stdunp_connect,
138 .vop_unp_detach = vop_stdunp_detach,
139 .vop_is_text = vop_stdis_text,
140 .vop_set_text = vop_stdset_text,
141 .vop_unset_text = vop_stdunset_text,
142 .vop_add_writecount = vop_stdadd_writecount,
146 * Series of placeholder functions for various error returns for
151 vop_eopnotsupp(struct vop_generic_args *ap)
154 printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name);
161 vop_ebadf(struct vop_generic_args *ap)
168 vop_enotty(struct vop_generic_args *ap)
175 vop_einval(struct vop_generic_args *ap)
182 vop_enoent(struct vop_generic_args *ap)
189 vop_null(struct vop_generic_args *ap)
196 * Helper function to panic on some bad VOPs in some filesystems.
199 vop_panic(struct vop_generic_args *ap)
202 panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name);
206 * vop_std<something> and vop_no<something> are default functions for use by
207 * filesystems that need the "default reasonable" implementation for a
208 * particular operation.
210 * The documentation for the operations they implement exists (if it exists)
211 * in the VOP_<SOMETHING>(9) manpage (all uppercase).
215 * Default vop for filesystems that do not support name lookup
219 struct vop_lookup_args /* {
221 struct vnode **a_vpp;
222 struct componentname *a_cnp;
233 * Handle unlock and reference counting for arguments of vop_rename
234 * for filesystems that do not implement rename operation.
237 vop_norename(struct vop_rename_args *ap)
247 * Strategy routine for VFS devices that have none.
249 * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy
250 * routine. Typically this is done for a BIO_READ strategy call.
251 * Typically B_INVAL is assumed to already be clear prior to a write
252 * and should not be cleared manually unless you just made the buffer
253 * invalid. BIO_ERROR should be cleared either way.
257 vop_nostrategy (struct vop_strategy_args *ap)
259 printf("No strategy for buffer at %p\n", ap->a_bp);
260 vn_printf(ap->a_vp, "vnode ");
261 ap->a_bp->b_ioflags |= BIO_ERROR;
262 ap->a_bp->b_error = EOPNOTSUPP;
268 get_next_dirent(struct vnode *vp, struct dirent **dpp, char *dirbuf,
269 int dirbuflen, off_t *off, char **cpos, int *len,
270 int *eofflag, struct thread *td)
277 KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp));
278 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp));
281 iov.iov_base = dirbuf;
282 iov.iov_len = dirbuflen;
286 uio.uio_offset = *off;
287 uio.uio_resid = dirbuflen;
288 uio.uio_segflg = UIO_SYSSPACE;
289 uio.uio_rw = UIO_READ;
295 error = mac_vnode_check_readdir(td->td_ucred, vp);
298 error = VOP_READDIR(vp, &uio, td->td_ucred, eofflag,
303 *off = uio.uio_offset;
306 *len = (dirbuflen - uio.uio_resid);
312 dp = (struct dirent *)(*cpos);
313 reclen = dp->d_reclen;
316 /* check for malformed directory.. */
317 if (reclen < DIRENT_MINSIZE)
327 * Check if a named file exists in a given directory vnode.
330 dirent_exists(struct vnode *vp, const char *dirname, struct thread *td)
333 int error, eofflag, dirbuflen, len, found;
338 KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp));
339 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp));
343 error = VOP_GETATTR(vp, &va, td->td_ucred);
347 dirbuflen = DEV_BSIZE;
348 if (dirbuflen < va.va_blocksize)
349 dirbuflen = va.va_blocksize;
350 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK);
355 error = get_next_dirent(vp, &dp, dirbuf, dirbuflen, &off,
356 &cpos, &len, &eofflag, td);
360 if (dp->d_type != DT_WHT && dp->d_fileno != 0 &&
361 strcmp(dp->d_name, dirname) == 0) {
365 } while (len > 0 || !eofflag);
368 free(dirbuf, M_TEMP);
373 vop_stdaccess(struct vop_access_args *ap)
376 KASSERT((ap->a_accmode & ~(VEXEC | VWRITE | VREAD | VADMIN |
377 VAPPEND)) == 0, ("invalid bit in accmode"));
379 return (VOP_ACCESSX(ap->a_vp, ap->a_accmode, ap->a_cred, ap->a_td));
383 vop_stdaccessx(struct vop_accessx_args *ap)
386 accmode_t accmode = ap->a_accmode;
388 error = vfs_unixify_accmode(&accmode);
395 return (VOP_ACCESS(ap->a_vp, accmode, ap->a_cred, ap->a_td));
399 * Advisory record locking support
402 vop_stdadvlock(struct vop_advlock_args *ap)
409 if (ap->a_fl->l_whence == SEEK_END) {
411 * The NFSv4 server must avoid doing a vn_lock() here, since it
412 * can deadlock the nfsd threads, due to a LOR. Fortunately
413 * the NFSv4 server always uses SEEK_SET and this code is
414 * only required for the SEEK_END case.
416 vn_lock(vp, LK_SHARED | LK_RETRY);
417 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
424 return (lf_advlock(ap, &(vp->v_lockf), vattr.va_size));
428 vop_stdadvlockasync(struct vop_advlockasync_args *ap)
435 if (ap->a_fl->l_whence == SEEK_END) {
436 /* The size argument is only needed for SEEK_END. */
437 vn_lock(vp, LK_SHARED | LK_RETRY);
438 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
445 return (lf_advlockasync(ap, &(vp->v_lockf), vattr.va_size));
449 vop_stdadvlockpurge(struct vop_advlockpurge_args *ap)
454 lf_purgelocks(vp, &vp->v_lockf);
461 * Standard implementation of POSIX pathconf, to get information about limits
463 * Override per filesystem for the case where the filesystem has smaller
468 struct vop_pathconf_args /* {
475 switch (ap->a_name) {
477 *ap->a_retval = _POSIX_ASYNCHRONOUS_IO;
480 *ap->a_retval = PATH_MAX;
482 case _PC_ACL_EXTENDED:
484 case _PC_CAP_PRESENT:
485 case _PC_INF_PRESENT:
486 case _PC_MAC_PRESENT:
496 * Standard lock, unlock and islocked functions.
500 struct vop_lock1_args /* {
507 struct vnode *vp = ap->a_vp;
511 return (lockmgr_lock_fast_path(vp->v_vnlock, ap->a_flags,
512 &ilk->lock_object, ap->a_file, ap->a_line));
518 struct vop_unlock_args /* {
523 struct vnode *vp = ap->a_vp;
527 return (lockmgr_unlock_fast_path(vp->v_vnlock, ap->a_flags,
534 struct vop_islocked_args /* {
539 return (lockstatus(ap->a_vp->v_vnlock));
543 * Return true for select/poll.
547 struct vop_poll_args /* {
550 struct ucred *a_cred;
555 return (poll_no_poll(ap->a_events));
559 * Implement poll for local filesystems that support it.
563 struct vop_poll_args /* {
566 struct ucred *a_cred;
570 if (ap->a_events & ~POLLSTANDARD)
571 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events));
572 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM));
576 * Return our mount point, as we will take charge of the writes.
579 vop_stdgetwritemount(ap)
580 struct vop_getwritemount_args /* {
582 struct mount **a_mpp;
588 * XXX Since this is called unlocked we may be recycled while
589 * attempting to ref the mount. If this is the case or mountpoint
590 * will be set to NULL. We only have to prevent this call from
591 * returning with a ref to an incorrect mountpoint. It is not
592 * harmful to return with a ref to our previous mountpoint.
594 mp = ap->a_vp->v_mount;
597 if (mp != ap->a_vp->v_mount) {
606 /* XXX Needs good comment and VOP_BMAP(9) manpage */
609 struct vop_bmap_args /* {
612 struct bufobj **a_bop;
619 if (ap->a_bop != NULL)
620 *ap->a_bop = &ap->a_vp->v_bufobj;
621 if (ap->a_bnp != NULL)
622 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize);
623 if (ap->a_runp != NULL)
625 if (ap->a_runb != NULL)
632 struct vop_fsync_args /* {
639 return (vn_fsync_buf(ap->a_vp, ap->a_waitfor));
643 vop_stdfdatasync(struct vop_fdatasync_args *ap)
646 return (VOP_FSYNC(ap->a_vp, MNT_WAIT, ap->a_td));
650 vop_stdfdatasync_buf(struct vop_fdatasync_args *ap)
653 return (vn_fsync_buf(ap->a_vp, MNT_WAIT));
656 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */
659 struct vop_getpages_args /* {
668 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m,
669 ap->a_count, ap->a_rbehind, ap->a_rahead, NULL, NULL);
673 vop_stdgetpages_async(struct vop_getpages_async_args *ap)
677 error = VOP_GETPAGES(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind,
679 ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error);
684 vop_stdkqfilter(struct vop_kqfilter_args *ap)
686 return vfs_kqfilter(ap);
689 /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */
692 struct vop_putpages_args /* {
701 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
702 ap->a_sync, ap->a_rtvals);
706 vop_stdvptofh(struct vop_vptofh_args *ap)
712 vop_stdvptocnp(struct vop_vptocnp_args *ap)
714 struct vnode *vp = ap->a_vp;
715 struct vnode **dvp = ap->a_vpp;
716 struct ucred *cred = ap->a_cred;
717 char *buf = ap->a_buf;
718 int *buflen = ap->a_buflen;
720 int i, error, eofflag, dirbuflen, flags, locked, len, covered;
734 if (vp->v_type != VDIR)
737 error = VOP_GETATTR(vp, &va, cred);
742 locked = VOP_ISLOCKED(vp);
744 NDINIT_ATVP(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE,
747 error = vn_open_cred(&nd, &flags, 0, VN_OPEN_NOAUDIT, cred, NULL);
749 vn_lock(vp, locked | LK_RETRY);
752 NDFREE(&nd, NDF_ONLY_PNBUF);
754 mvp = *dvp = nd.ni_vp;
756 if (vp->v_mount != (*dvp)->v_mount &&
757 ((*dvp)->v_vflag & VV_ROOT) &&
758 ((*dvp)->v_mount->mnt_flag & MNT_UNION)) {
759 *dvp = (*dvp)->v_mount->mnt_vnodecovered;
762 vn_close(mvp, FREAD, cred, td);
764 vn_lock(*dvp, LK_SHARED | LK_RETRY);
768 fileno = va.va_fileid;
770 dirbuflen = DEV_BSIZE;
771 if (dirbuflen < va.va_blocksize)
772 dirbuflen = va.va_blocksize;
773 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK);
775 if ((*dvp)->v_type != VDIR) {
783 /* call VOP_READDIR of parent */
784 error = get_next_dirent(*dvp, &dp, dirbuf, dirbuflen, &off,
785 &cpos, &len, &eofflag, td);
789 if ((dp->d_type != DT_WHT) &&
790 (dp->d_fileno == fileno)) {
793 vn_lock(mvp, LK_SHARED | LK_RETRY);
794 if (dirent_exists(mvp, dp->d_name, td)) {
797 vn_lock(*dvp, LK_SHARED | LK_RETRY);
801 vn_lock(*dvp, LK_SHARED | LK_RETRY);
809 if (dp->d_namlen == 1 && dp->d_name[0] == '.') {
812 bcopy(dp->d_name, buf + i, dp->d_namlen);
817 } while (len > 0 || !eofflag);
821 free(dirbuf, M_TEMP);
831 vn_close(mvp, FREAD, cred, td);
833 vn_lock(vp, locked | LK_RETRY);
838 vop_stdallocate(struct vop_allocate_args *ap)
842 off_t maxfilesize = 0;
845 struct vattr vattr, *vap;
847 off_t fsize, len, cur, offset;
860 offset = *ap->a_offset;
862 error = VOP_GETATTR(vp, vap, td->td_ucred);
865 fsize = vap->va_size;
866 iosize = vap->va_blocksize;
868 iosize = BLKDEV_IOSIZE;
869 if (iosize > MAXPHYS)
871 buf = malloc(iosize, M_TEMP, M_WAITOK);
875 * Check if the filesystem sets f_maxfilesize; if not use
876 * VOP_SETATTR to perform the check.
878 sfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
879 error = VFS_STATFS(vp->v_mount, sfs, td);
881 maxfilesize = sfs->f_maxfilesize;
886 if (offset > maxfilesize || len > maxfilesize ||
887 offset + len > maxfilesize) {
893 if (offset + len > vap->va_size) {
895 * Test offset + len against the filesystem's maxfilesize.
898 vap->va_size = offset + len;
899 error = VOP_SETATTR(vp, vap, td->td_ucred);
903 vap->va_size = fsize;
904 error = VOP_SETATTR(vp, vap, td->td_ucred);
911 * Read and write back anything below the nominal file
912 * size. There's currently no way outside the filesystem
913 * to know whether this area is sparse or not.
916 if ((offset % iosize) != 0)
917 cur -= (offset % iosize);
920 if (offset < fsize) {
923 auio.uio_iov = &aiov;
925 auio.uio_offset = offset;
926 auio.uio_resid = cur;
927 auio.uio_segflg = UIO_SYSSPACE;
928 auio.uio_rw = UIO_READ;
930 error = VOP_READ(vp, &auio, 0, td->td_ucred);
933 if (auio.uio_resid > 0) {
934 bzero(buf + cur - auio.uio_resid,
943 auio.uio_iov = &aiov;
945 auio.uio_offset = offset;
946 auio.uio_resid = cur;
947 auio.uio_segflg = UIO_SYSSPACE;
948 auio.uio_rw = UIO_WRITE;
951 error = VOP_WRITE(vp, &auio, 0, td->td_ucred);
965 *ap->a_offset = offset;
971 vop_stdadvise(struct vop_advise_args *ap)
975 daddr_t startn, endn;
976 off_t bstart, bend, start, end;
980 switch (ap->a_advice) {
981 case POSIX_FADV_WILLNEED:
983 * Do nothing for now. Filesystems should provide a
984 * custom method which starts an asynchronous read of
985 * the requested region.
989 case POSIX_FADV_DONTNEED:
991 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
992 if (vp->v_iflag & VI_DOOMED) {
998 * Round to block boundaries (and later possibly further to
999 * page boundaries). Applications cannot reasonably be aware
1000 * of the boundaries, and the rounding must be to expand at
1001 * both extremities to cover enough. It still doesn't cover
1002 * read-ahead. For partial blocks, this gives unnecessary
1003 * discarding of buffers but is efficient enough since the
1004 * pages usually remain in VMIO for some time.
1006 bsize = vp->v_bufobj.bo_bsize;
1007 bstart = rounddown(ap->a_start, bsize);
1008 bend = roundup(ap->a_end, bsize);
1011 * Deactivate pages in the specified range from the backing VM
1012 * object. Pages that are resident in the buffer cache will
1013 * remain wired until their corresponding buffers are released
1016 if (vp->v_object != NULL) {
1017 start = trunc_page(bstart);
1018 end = round_page(bend);
1019 VM_OBJECT_RLOCK(vp->v_object);
1020 vm_object_page_noreuse(vp->v_object, OFF_TO_IDX(start),
1022 VM_OBJECT_RUNLOCK(vp->v_object);
1027 startn = bstart / bsize;
1028 endn = bend / bsize;
1029 error = bnoreuselist(&bo->bo_clean, bo, startn, endn);
1031 error = bnoreuselist(&bo->bo_dirty, bo, startn, endn);
1043 vop_stdunp_bind(struct vop_unp_bind_args *ap)
1046 ap->a_vp->v_unpcb = ap->a_unpcb;
1051 vop_stdunp_connect(struct vop_unp_connect_args *ap)
1054 *ap->a_unpcb = ap->a_vp->v_unpcb;
1059 vop_stdunp_detach(struct vop_unp_detach_args *ap)
1062 ap->a_vp->v_unpcb = NULL;
1067 vop_stdis_text(struct vop_is_text_args *ap)
1070 return (ap->a_vp->v_writecount < 0);
1074 vop_stdset_text(struct vop_set_text_args *ap)
1081 if (vp->v_writecount > 0) {
1092 vop_stdunset_text(struct vop_unset_text_args *ap)
1099 if (vp->v_writecount < 0) {
1110 vop_stdadd_writecount(struct vop_add_writecount_args *ap)
1117 if (vp->v_writecount < 0) {
1120 VNASSERT(vp->v_writecount + ap->a_inc >= 0, vp,
1121 ("neg writecount increment %d", ap->a_inc));
1122 vp->v_writecount += ap->a_inc;
1131 * used to fill the vfs function table to get reasonable default return values.
1134 vfs_stdroot (mp, flags, vpp)
1140 return (EOPNOTSUPP);
1144 vfs_stdstatfs (mp, sbp)
1149 return (EOPNOTSUPP);
1153 vfs_stdquotactl (mp, cmds, uid, arg)
1160 return (EOPNOTSUPP);
1164 vfs_stdsync(mp, waitfor)
1168 struct vnode *vp, *mvp;
1170 int error, lockreq, allerror = 0;
1173 lockreq = LK_EXCLUSIVE | LK_INTERLOCK;
1174 if (waitfor != MNT_WAIT)
1175 lockreq |= LK_NOWAIT;
1177 * Force stale buffer cache information to be flushed.
1180 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) {
1181 if (vp->v_bufobj.bo_dirty.bv_cnt == 0) {
1185 if ((error = vget(vp, lockreq, td)) != 0) {
1186 if (error == ENOENT) {
1187 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
1192 error = VOP_FSYNC(vp, waitfor, td);
1201 vfs_stdnosync (mp, waitfor)
1210 vfs_stdvget (mp, ino, flags, vpp)
1217 return (EOPNOTSUPP);
1221 vfs_stdfhtovp (mp, fhp, flags, vpp)
1228 return (EOPNOTSUPP);
1233 struct vfsconf *vfsp;
1240 vfs_stduninit (vfsp)
1241 struct vfsconf *vfsp;
1248 vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname)
1251 struct vnode *filename_vp;
1253 const char *attrname;
1256 if (filename_vp != NULL)
1257 VOP_UNLOCK(filename_vp, 0);
1258 return (EOPNOTSUPP);
1262 vfs_stdsysctl(mp, op, req)
1265 struct sysctl_req *req;
1268 return (EOPNOTSUPP);
1271 static vop_bypass_t *
1272 bp_by_off(struct vop_vector *vop, struct vop_generic_args *a)
1275 return (*(vop_bypass_t **)((char *)vop + a->a_desc->vdesc_vop_offset));
1279 vop_sigdefer(struct vop_vector *vop, struct vop_generic_args *a)
1284 for (; vop != NULL; vop = vop->vop_default) {
1285 bp = bp_by_off(vop, a);
1290 * Bypass is not really supported. It is done for
1291 * fallback to unimplemented vops in the default
1294 bp = vop->vop_bypass;
1300 prev_stops = sigdeferstop(SIGDEFERSTOP_SILENT);
1302 sigallowstop(prev_stops);