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/filio.h>
47 #include <sys/kernel.h>
48 #include <sys/limits.h>
50 #include <sys/lockf.h>
51 #include <sys/malloc.h>
52 #include <sys/mount.h>
53 #include <sys/namei.h>
54 #include <sys/rwlock.h>
55 #include <sys/fcntl.h>
56 #include <sys/unistd.h>
57 #include <sys/vnode.h>
58 #include <sys/dirent.h>
61 #include <security/mac/mac_framework.h>
64 #include <vm/vm_object.h>
65 #include <vm/vm_extern.h>
67 #include <vm/vm_map.h>
68 #include <vm/vm_page.h>
69 #include <vm/vm_pager.h>
70 #include <vm/vnode_pager.h>
72 static int vop_nolookup(struct vop_lookup_args *);
73 static int vop_norename(struct vop_rename_args *);
74 static int vop_nostrategy(struct vop_strategy_args *);
75 static int get_next_dirent(struct vnode *vp, struct dirent **dpp,
76 char *dirbuf, int dirbuflen, off_t *off,
77 char **cpos, int *len, int *eofflag,
79 static int dirent_exists(struct vnode *vp, const char *dirname,
82 #define DIRENT_MINSIZE (sizeof(struct dirent) - (MAXNAMLEN+1) + 4)
84 static int vop_stdis_text(struct vop_is_text_args *ap);
85 static int vop_stdunset_text(struct vop_unset_text_args *ap);
86 static int vop_stdadd_writecount(struct vop_add_writecount_args *ap);
87 static int vop_stdcopy_file_range(struct vop_copy_file_range_args *ap);
88 static int vop_stdfdatasync(struct vop_fdatasync_args *ap);
89 static int vop_stdgetpages_async(struct vop_getpages_async_args *ap);
92 * This vnode table stores what we want to do if the filesystem doesn't
93 * implement a particular VOP.
95 * If there is no specific entry here, we will return EOPNOTSUPP.
97 * Note that every filesystem has to implement either vop_access
98 * or vop_accessx; failing to do so will result in immediate crash
99 * due to stack overflow, as vop_stdaccess() calls vop_stdaccessx(),
100 * which calls vop_stdaccess() etc.
103 struct vop_vector default_vnodeops = {
105 .vop_bypass = VOP_EOPNOTSUPP,
107 .vop_access = vop_stdaccess,
108 .vop_accessx = vop_stdaccessx,
109 .vop_advise = vop_stdadvise,
110 .vop_advlock = vop_stdadvlock,
111 .vop_advlockasync = vop_stdadvlockasync,
112 .vop_advlockpurge = vop_stdadvlockpurge,
113 .vop_allocate = vop_stdallocate,
114 .vop_bmap = vop_stdbmap,
115 .vop_close = VOP_NULL,
116 .vop_fsync = VOP_NULL,
117 .vop_fdatasync = vop_stdfdatasync,
118 .vop_getpages = vop_stdgetpages,
119 .vop_getpages_async = vop_stdgetpages_async,
120 .vop_getwritemount = vop_stdgetwritemount,
121 .vop_inactive = VOP_NULL,
122 .vop_need_inactive = vop_stdneed_inactive,
123 .vop_ioctl = vop_stdioctl,
124 .vop_kqfilter = vop_stdkqfilter,
125 .vop_islocked = vop_stdislocked,
126 .vop_lock1 = vop_stdlock,
127 .vop_lookup = vop_nolookup,
128 .vop_open = VOP_NULL,
129 .vop_pathconf = VOP_EINVAL,
130 .vop_poll = vop_nopoll,
131 .vop_putpages = vop_stdputpages,
132 .vop_readlink = VOP_EINVAL,
133 .vop_rename = vop_norename,
134 .vop_revoke = VOP_PANIC,
135 .vop_strategy = vop_nostrategy,
136 .vop_unlock = vop_stdunlock,
137 .vop_vptocnp = vop_stdvptocnp,
138 .vop_vptofh = vop_stdvptofh,
139 .vop_unp_bind = vop_stdunp_bind,
140 .vop_unp_connect = vop_stdunp_connect,
141 .vop_unp_detach = vop_stdunp_detach,
142 .vop_is_text = vop_stdis_text,
143 .vop_set_text = vop_stdset_text,
144 .vop_unset_text = vop_stdunset_text,
145 .vop_add_writecount = vop_stdadd_writecount,
146 .vop_copy_file_range = vop_stdcopy_file_range,
148 VFS_VOP_VECTOR_REGISTER(default_vnodeops);
151 * Series of placeholder functions for various error returns for
156 vop_eopnotsupp(struct vop_generic_args *ap)
159 printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name);
166 vop_ebadf(struct vop_generic_args *ap)
173 vop_enotty(struct vop_generic_args *ap)
180 vop_einval(struct vop_generic_args *ap)
187 vop_enoent(struct vop_generic_args *ap)
194 vop_null(struct vop_generic_args *ap)
201 * Helper function to panic on some bad VOPs in some filesystems.
204 vop_panic(struct vop_generic_args *ap)
207 panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name);
211 * vop_std<something> and vop_no<something> are default functions for use by
212 * filesystems that need the "default reasonable" implementation for a
213 * particular operation.
215 * The documentation for the operations they implement exists (if it exists)
216 * in the VOP_<SOMETHING>(9) manpage (all uppercase).
220 * Default vop for filesystems that do not support name lookup
224 struct vop_lookup_args /* {
226 struct vnode **a_vpp;
227 struct componentname *a_cnp;
238 * Handle unlock and reference counting for arguments of vop_rename
239 * for filesystems that do not implement rename operation.
242 vop_norename(struct vop_rename_args *ap)
252 * Strategy routine for VFS devices that have none.
254 * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy
255 * routine. Typically this is done for a BIO_READ strategy call.
256 * Typically B_INVAL is assumed to already be clear prior to a write
257 * and should not be cleared manually unless you just made the buffer
258 * invalid. BIO_ERROR should be cleared either way.
262 vop_nostrategy (struct vop_strategy_args *ap)
264 printf("No strategy for buffer at %p\n", ap->a_bp);
265 vn_printf(ap->a_vp, "vnode ");
266 ap->a_bp->b_ioflags |= BIO_ERROR;
267 ap->a_bp->b_error = EOPNOTSUPP;
273 get_next_dirent(struct vnode *vp, struct dirent **dpp, char *dirbuf,
274 int dirbuflen, off_t *off, char **cpos, int *len,
275 int *eofflag, struct thread *td)
282 KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp));
283 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp));
286 iov.iov_base = dirbuf;
287 iov.iov_len = dirbuflen;
291 uio.uio_offset = *off;
292 uio.uio_resid = dirbuflen;
293 uio.uio_segflg = UIO_SYSSPACE;
294 uio.uio_rw = UIO_READ;
300 error = mac_vnode_check_readdir(td->td_ucred, vp);
303 error = VOP_READDIR(vp, &uio, td->td_ucred, eofflag,
308 *off = uio.uio_offset;
311 *len = (dirbuflen - uio.uio_resid);
317 dp = (struct dirent *)(*cpos);
318 reclen = dp->d_reclen;
321 /* check for malformed directory.. */
322 if (reclen < DIRENT_MINSIZE)
332 * Check if a named file exists in a given directory vnode.
335 dirent_exists(struct vnode *vp, const char *dirname, struct thread *td)
338 int error, eofflag, dirbuflen, len, found;
343 KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp));
344 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp));
348 error = VOP_GETATTR(vp, &va, td->td_ucred);
352 dirbuflen = DEV_BSIZE;
353 if (dirbuflen < va.va_blocksize)
354 dirbuflen = va.va_blocksize;
355 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK);
360 error = get_next_dirent(vp, &dp, dirbuf, dirbuflen, &off,
361 &cpos, &len, &eofflag, td);
365 if (dp->d_type != DT_WHT && dp->d_fileno != 0 &&
366 strcmp(dp->d_name, dirname) == 0) {
370 } while (len > 0 || !eofflag);
373 free(dirbuf, M_TEMP);
378 vop_stdaccess(struct vop_access_args *ap)
381 KASSERT((ap->a_accmode & ~(VEXEC | VWRITE | VREAD | VADMIN |
382 VAPPEND)) == 0, ("invalid bit in accmode"));
384 return (VOP_ACCESSX(ap->a_vp, ap->a_accmode, ap->a_cred, ap->a_td));
388 vop_stdaccessx(struct vop_accessx_args *ap)
391 accmode_t accmode = ap->a_accmode;
393 error = vfs_unixify_accmode(&accmode);
400 return (VOP_ACCESS(ap->a_vp, accmode, ap->a_cred, ap->a_td));
404 * Advisory record locking support
407 vop_stdadvlock(struct vop_advlock_args *ap)
414 if (ap->a_fl->l_whence == SEEK_END) {
416 * The NFSv4 server must avoid doing a vn_lock() here, since it
417 * can deadlock the nfsd threads, due to a LOR. Fortunately
418 * the NFSv4 server always uses SEEK_SET and this code is
419 * only required for the SEEK_END case.
421 vn_lock(vp, LK_SHARED | LK_RETRY);
422 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
429 return (lf_advlock(ap, &(vp->v_lockf), vattr.va_size));
433 vop_stdadvlockasync(struct vop_advlockasync_args *ap)
440 if (ap->a_fl->l_whence == SEEK_END) {
441 /* The size argument is only needed for SEEK_END. */
442 vn_lock(vp, LK_SHARED | LK_RETRY);
443 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
450 return (lf_advlockasync(ap, &(vp->v_lockf), vattr.va_size));
454 vop_stdadvlockpurge(struct vop_advlockpurge_args *ap)
459 lf_purgelocks(vp, &vp->v_lockf);
466 * Standard implementation of POSIX pathconf, to get information about limits
468 * Override per filesystem for the case where the filesystem has smaller
473 struct vop_pathconf_args /* {
480 switch (ap->a_name) {
482 *ap->a_retval = _POSIX_ASYNCHRONOUS_IO;
485 *ap->a_retval = PATH_MAX;
487 case _PC_ACL_EXTENDED:
489 case _PC_CAP_PRESENT:
490 case _PC_INF_PRESENT:
491 case _PC_MAC_PRESENT:
501 * Standard lock, unlock and islocked functions.
505 struct vop_lock1_args /* {
512 struct vnode *vp = ap->a_vp;
516 return (lockmgr_lock_fast_path(vp->v_vnlock, ap->a_flags,
517 &ilk->lock_object, ap->a_file, ap->a_line));
523 struct vop_unlock_args /* {
527 struct vnode *vp = ap->a_vp;
529 return (lockmgr_unlock(vp->v_vnlock));
535 struct vop_islocked_args /* {
540 return (lockstatus(ap->a_vp->v_vnlock));
544 * Variants of the above set.
547 * - shared locking disablement is not supported
548 * - v_vnlock pointer is not honored
552 struct vop_lock1_args /* {
559 struct vnode *vp = ap->a_vp;
560 int flags = ap->a_flags;
563 MPASS(vp->v_vnlock == &vp->v_lock);
565 if (__predict_false((flags & ~(LK_TYPE_MASK | LK_NODDLKTREAT | LK_RETRY)) != 0))
568 switch (flags & LK_TYPE_MASK) {
570 return (lockmgr_slock(&vp->v_lock, flags, ap->a_file, ap->a_line));
572 return (lockmgr_xlock(&vp->v_lock, flags, ap->a_file, ap->a_line));
576 return (lockmgr_lock_fast_path(&vp->v_lock, flags,
577 &ilk->lock_object, ap->a_file, ap->a_line));
582 struct vop_unlock_args /* {
586 struct vnode *vp = ap->a_vp;
588 MPASS(vp->v_vnlock == &vp->v_lock);
590 return (lockmgr_unlock(&vp->v_lock));
595 struct vop_islocked_args /* {
599 struct vnode *vp = ap->a_vp;
601 MPASS(vp->v_vnlock == &vp->v_lock);
603 return (lockstatus(&vp->v_lock));
607 * Return true for select/poll.
611 struct vop_poll_args /* {
614 struct ucred *a_cred;
619 return (poll_no_poll(ap->a_events));
623 * Implement poll for local filesystems that support it.
627 struct vop_poll_args /* {
630 struct ucred *a_cred;
634 if (ap->a_events & ~POLLSTANDARD)
635 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events));
636 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM));
640 * Return our mount point, as we will take charge of the writes.
643 vop_stdgetwritemount(ap)
644 struct vop_getwritemount_args /* {
646 struct mount **a_mpp;
653 * Note that having a reference does not prevent forced unmount from
654 * setting ->v_mount to NULL after the lock gets released. This is of
655 * no consequence for typical consumers (most notably vn_start_write)
656 * since in this case the vnode is VIRF_DOOMED. Unmount might have
657 * progressed far enough that its completion is only delayed by the
658 * reference obtained here. The consumer only needs to concern itself
667 if (vfs_op_thread_enter(mp)) {
668 if (mp == vp->v_mount) {
669 vfs_mp_count_add_pcpu(mp, ref, 1);
670 vfs_op_thread_exit(mp);
672 vfs_op_thread_exit(mp);
677 if (mp == vp->v_mount) {
690 * If the file system doesn't implement VOP_BMAP, then return sensible defaults:
691 * - Return the vnode's bufobj instead of any underlying device's bufobj
692 * - Calculate the physical block number as if there were equal size
693 * consecutive blocks, but
694 * - Report no contiguous runs of blocks.
698 struct vop_bmap_args /* {
701 struct bufobj **a_bop;
708 if (ap->a_bop != NULL)
709 *ap->a_bop = &ap->a_vp->v_bufobj;
710 if (ap->a_bnp != NULL)
711 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize);
712 if (ap->a_runp != NULL)
714 if (ap->a_runb != NULL)
721 struct vop_fsync_args /* {
728 return (vn_fsync_buf(ap->a_vp, ap->a_waitfor));
732 vop_stdfdatasync(struct vop_fdatasync_args *ap)
735 return (VOP_FSYNC(ap->a_vp, MNT_WAIT, ap->a_td));
739 vop_stdfdatasync_buf(struct vop_fdatasync_args *ap)
742 return (vn_fsync_buf(ap->a_vp, MNT_WAIT));
745 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */
748 struct vop_getpages_args /* {
757 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m,
758 ap->a_count, ap->a_rbehind, ap->a_rahead, NULL, NULL);
762 vop_stdgetpages_async(struct vop_getpages_async_args *ap)
766 error = VOP_GETPAGES(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind,
768 ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error);
773 vop_stdkqfilter(struct vop_kqfilter_args *ap)
775 return vfs_kqfilter(ap);
778 /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */
781 struct vop_putpages_args /* {
790 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
791 ap->a_sync, ap->a_rtvals);
795 vop_stdvptofh(struct vop_vptofh_args *ap)
801 vop_stdvptocnp(struct vop_vptocnp_args *ap)
803 struct vnode *vp = ap->a_vp;
804 struct vnode **dvp = ap->a_vpp;
805 struct ucred *cred = ap->a_cred;
806 char *buf = ap->a_buf;
807 int *buflen = ap->a_buflen;
809 int i, error, eofflag, dirbuflen, flags, locked, len, covered;
823 if (vp->v_type != VDIR)
826 error = VOP_GETATTR(vp, &va, cred);
831 locked = VOP_ISLOCKED(vp);
833 NDINIT_ATVP(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE,
836 error = vn_open_cred(&nd, &flags, 0, VN_OPEN_NOAUDIT, cred, NULL);
838 vn_lock(vp, locked | LK_RETRY);
841 NDFREE(&nd, NDF_ONLY_PNBUF);
843 mvp = *dvp = nd.ni_vp;
845 if (vp->v_mount != (*dvp)->v_mount &&
846 ((*dvp)->v_vflag & VV_ROOT) &&
847 ((*dvp)->v_mount->mnt_flag & MNT_UNION)) {
848 *dvp = (*dvp)->v_mount->mnt_vnodecovered;
851 vn_close(mvp, FREAD, cred, td);
853 vn_lock(*dvp, LK_SHARED | LK_RETRY);
857 fileno = va.va_fileid;
859 dirbuflen = DEV_BSIZE;
860 if (dirbuflen < va.va_blocksize)
861 dirbuflen = va.va_blocksize;
862 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK);
864 if ((*dvp)->v_type != VDIR) {
872 /* call VOP_READDIR of parent */
873 error = get_next_dirent(*dvp, &dp, dirbuf, dirbuflen, &off,
874 &cpos, &len, &eofflag, td);
878 if ((dp->d_type != DT_WHT) &&
879 (dp->d_fileno == fileno)) {
882 vn_lock(mvp, LK_SHARED | LK_RETRY);
883 if (dirent_exists(mvp, dp->d_name, td)) {
886 vn_lock(*dvp, LK_SHARED | LK_RETRY);
890 vn_lock(*dvp, LK_SHARED | LK_RETRY);
898 if (dp->d_namlen == 1 && dp->d_name[0] == '.') {
901 bcopy(dp->d_name, buf + i, dp->d_namlen);
906 } while (len > 0 || !eofflag);
910 free(dirbuf, M_TEMP);
920 vn_close(mvp, FREAD, cred, td);
922 vn_lock(vp, locked | LK_RETRY);
927 vop_stdallocate(struct vop_allocate_args *ap)
931 off_t maxfilesize = 0;
934 struct vattr vattr, *vap;
936 off_t fsize, len, cur, offset;
949 offset = *ap->a_offset;
951 error = VOP_GETATTR(vp, vap, td->td_ucred);
954 fsize = vap->va_size;
955 iosize = vap->va_blocksize;
957 iosize = BLKDEV_IOSIZE;
958 if (iosize > MAXPHYS)
960 buf = malloc(iosize, M_TEMP, M_WAITOK);
964 * Check if the filesystem sets f_maxfilesize; if not use
965 * VOP_SETATTR to perform the check.
967 sfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
968 error = VFS_STATFS(vp->v_mount, sfs, td);
970 maxfilesize = sfs->f_maxfilesize;
975 if (offset > maxfilesize || len > maxfilesize ||
976 offset + len > maxfilesize) {
982 if (offset + len > vap->va_size) {
984 * Test offset + len against the filesystem's maxfilesize.
987 vap->va_size = offset + len;
988 error = VOP_SETATTR(vp, vap, td->td_ucred);
992 vap->va_size = fsize;
993 error = VOP_SETATTR(vp, vap, td->td_ucred);
1000 * Read and write back anything below the nominal file
1001 * size. There's currently no way outside the filesystem
1002 * to know whether this area is sparse or not.
1005 if ((offset % iosize) != 0)
1006 cur -= (offset % iosize);
1009 if (offset < fsize) {
1010 aiov.iov_base = buf;
1012 auio.uio_iov = &aiov;
1013 auio.uio_iovcnt = 1;
1014 auio.uio_offset = offset;
1015 auio.uio_resid = cur;
1016 auio.uio_segflg = UIO_SYSSPACE;
1017 auio.uio_rw = UIO_READ;
1019 error = VOP_READ(vp, &auio, 0, td->td_ucred);
1022 if (auio.uio_resid > 0) {
1023 bzero(buf + cur - auio.uio_resid,
1030 aiov.iov_base = buf;
1032 auio.uio_iov = &aiov;
1033 auio.uio_iovcnt = 1;
1034 auio.uio_offset = offset;
1035 auio.uio_resid = cur;
1036 auio.uio_segflg = UIO_SYSSPACE;
1037 auio.uio_rw = UIO_WRITE;
1040 error = VOP_WRITE(vp, &auio, 0, td->td_ucred);
1054 *ap->a_offset = offset;
1060 vop_stdadvise(struct vop_advise_args *ap)
1064 daddr_t startn, endn;
1065 off_t bstart, bend, start, end;
1069 switch (ap->a_advice) {
1070 case POSIX_FADV_WILLNEED:
1072 * Do nothing for now. Filesystems should provide a
1073 * custom method which starts an asynchronous read of
1074 * the requested region.
1078 case POSIX_FADV_DONTNEED:
1080 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1081 if (VN_IS_DOOMED(vp)) {
1087 * Round to block boundaries (and later possibly further to
1088 * page boundaries). Applications cannot reasonably be aware
1089 * of the boundaries, and the rounding must be to expand at
1090 * both extremities to cover enough. It still doesn't cover
1091 * read-ahead. For partial blocks, this gives unnecessary
1092 * discarding of buffers but is efficient enough since the
1093 * pages usually remain in VMIO for some time.
1095 bsize = vp->v_bufobj.bo_bsize;
1096 bstart = rounddown(ap->a_start, bsize);
1097 bend = roundup(ap->a_end, bsize);
1100 * Deactivate pages in the specified range from the backing VM
1101 * object. Pages that are resident in the buffer cache will
1102 * remain wired until their corresponding buffers are released
1105 if (vp->v_object != NULL) {
1106 start = trunc_page(bstart);
1107 end = round_page(bend);
1108 VM_OBJECT_RLOCK(vp->v_object);
1109 vm_object_page_noreuse(vp->v_object, OFF_TO_IDX(start),
1111 VM_OBJECT_RUNLOCK(vp->v_object);
1116 startn = bstart / bsize;
1117 endn = bend / bsize;
1118 error = bnoreuselist(&bo->bo_clean, bo, startn, endn);
1120 error = bnoreuselist(&bo->bo_dirty, bo, startn, endn);
1132 vop_stdunp_bind(struct vop_unp_bind_args *ap)
1135 ap->a_vp->v_unpcb = ap->a_unpcb;
1140 vop_stdunp_connect(struct vop_unp_connect_args *ap)
1143 *ap->a_unpcb = ap->a_vp->v_unpcb;
1148 vop_stdunp_detach(struct vop_unp_detach_args *ap)
1151 ap->a_vp->v_unpcb = NULL;
1156 vop_stdis_text(struct vop_is_text_args *ap)
1159 return (ap->a_vp->v_writecount < 0);
1163 vop_stdset_text(struct vop_set_text_args *ap)
1171 if (vp->v_writecount > 0) {
1175 * If requested by fs, keep a use reference to the
1176 * vnode until the last text reference is released.
1179 if (mp != NULL && (mp->mnt_kern_flag & MNTK_TEXT_REFS) != 0 &&
1180 vp->v_writecount == 0) {
1181 vp->v_iflag |= VI_TEXT_REF;
1193 vop_stdunset_text(struct vop_unset_text_args *ap)
1202 if (vp->v_writecount < 0) {
1203 if ((vp->v_iflag & VI_TEXT_REF) != 0 &&
1204 vp->v_writecount == -1) {
1206 vp->v_iflag &= ~VI_TEXT_REF;
1220 vop_stdadd_writecount(struct vop_add_writecount_args *ap)
1227 VI_LOCK_FLAGS(vp, MTX_DUPOK);
1228 if (vp->v_writecount < 0) {
1231 VNASSERT(vp->v_writecount + ap->a_inc >= 0, vp,
1232 ("neg writecount increment %d", ap->a_inc));
1233 if (vp->v_writecount == 0) {
1235 if (mp != NULL && (mp->mnt_kern_flag & MNTK_NOMSYNC) == 0)
1238 vp->v_writecount += ap->a_inc;
1246 vop_stdneed_inactive(struct vop_need_inactive_args *ap)
1253 vop_stdioctl(struct vop_ioctl_args *ap)
1260 switch (ap->a_command) {
1264 error = vn_lock(vp, LK_SHARED);
1267 if (vp->v_type == VREG)
1268 error = VOP_GETATTR(vp, &va, ap->a_cred);
1273 if (*offp < 0 || *offp >= va.va_size)
1275 else if (ap->a_command == FIOSEEKHOLE)
1289 * used to fill the vfs function table to get reasonable default return values.
1292 vfs_stdroot (mp, flags, vpp)
1298 return (EOPNOTSUPP);
1302 vfs_stdstatfs (mp, sbp)
1307 return (EOPNOTSUPP);
1311 vfs_stdquotactl (mp, cmds, uid, arg)
1318 return (EOPNOTSUPP);
1322 vfs_stdsync(mp, waitfor)
1326 struct vnode *vp, *mvp;
1328 int error, lockreq, allerror = 0;
1331 lockreq = LK_EXCLUSIVE | LK_INTERLOCK;
1332 if (waitfor != MNT_WAIT)
1333 lockreq |= LK_NOWAIT;
1335 * Force stale buffer cache information to be flushed.
1338 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) {
1339 if (vp->v_bufobj.bo_dirty.bv_cnt == 0) {
1343 if ((error = vget(vp, lockreq, td)) != 0) {
1344 if (error == ENOENT) {
1345 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
1350 error = VOP_FSYNC(vp, waitfor, td);
1359 vfs_stdnosync (mp, waitfor)
1368 vop_stdcopy_file_range(struct vop_copy_file_range_args *ap)
1372 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
1373 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred,
1374 ap->a_outcred, ap->a_fsizetd);
1379 vfs_stdvget (mp, ino, flags, vpp)
1386 return (EOPNOTSUPP);
1390 vfs_stdfhtovp (mp, fhp, flags, vpp)
1397 return (EOPNOTSUPP);
1402 struct vfsconf *vfsp;
1409 vfs_stduninit (vfsp)
1410 struct vfsconf *vfsp;
1417 vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname)
1420 struct vnode *filename_vp;
1422 const char *attrname;
1425 if (filename_vp != NULL)
1426 VOP_UNLOCK(filename_vp);
1427 return (EOPNOTSUPP);
1431 vfs_stdsysctl(mp, op, req)
1434 struct sysctl_req *req;
1437 return (EOPNOTSUPP);
1440 static vop_bypass_t *
1441 bp_by_off(struct vop_vector *vop, struct vop_generic_args *a)
1444 return (*(vop_bypass_t **)((char *)vop + a->a_desc->vdesc_vop_offset));
1448 vop_sigdefer(struct vop_vector *vop, struct vop_generic_args *a)
1453 for (; vop != NULL; vop = vop->vop_default) {
1454 bp = bp_by_off(vop, a);
1459 * Bypass is not really supported. It is done for
1460 * fallback to unimplemented vops in the default
1463 bp = vop->vop_bypass;
1469 prev_stops = sigdeferstop(SIGDEFERSTOP_SILENT);
1471 sigallowstop(prev_stops);