/* * Copyright (c) 1989, 1993, 1995 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)spec_vnops.c 8.14 (Berkeley) 5/21/95 * $FreeBSD: src/sys/miscfs/specfs/spec_vnops.c,v 1.131.2.4 2001/02/26 04:23:20 jlemon Exp $ * $DragonFly: src/sys/vfs/specfs/spec_vnops.c,v 1.18 2004/06/15 00:30:55 dillon Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int spec_advlock (struct vop_advlock_args *); static int spec_bmap (struct vop_bmap_args *); static int spec_close (struct vop_close_args *); static int spec_freeblks (struct vop_freeblks_args *); static int spec_fsync (struct vop_fsync_args *); static int spec_getpages (struct vop_getpages_args *); static int spec_inactive (struct vop_inactive_args *); static int spec_ioctl (struct vop_ioctl_args *); static int spec_open (struct vop_open_args *); static int spec_poll (struct vop_poll_args *); static int spec_kqfilter (struct vop_kqfilter_args *); static int spec_print (struct vop_print_args *); static int spec_read (struct vop_read_args *); static int spec_strategy (struct vop_strategy_args *); static int spec_write (struct vop_write_args *); vop_t **spec_vnodeop_p; static struct vnodeopv_entry_desc spec_vnodeop_entries[] = { { &vop_default_desc, (vop_t *) vop_defaultop }, { &vop_access_desc, (vop_t *) vop_ebadf }, { &vop_advlock_desc, (vop_t *) spec_advlock }, { &vop_bmap_desc, (vop_t *) spec_bmap }, { &vop_close_desc, (vop_t *) spec_close }, { &vop_create_desc, (vop_t *) vop_panic }, { &vop_freeblks_desc, (vop_t *) spec_freeblks }, { &vop_fsync_desc, (vop_t *) spec_fsync }, { &vop_getpages_desc, (vop_t *) spec_getpages }, { &vop_inactive_desc, (vop_t *) spec_inactive }, { &vop_ioctl_desc, (vop_t *) spec_ioctl }, { &vop_lease_desc, (vop_t *) vop_null }, { &vop_link_desc, (vop_t *) vop_panic }, { &vop_mkdir_desc, (vop_t *) vop_panic }, { &vop_mknod_desc, (vop_t *) vop_panic }, { &vop_open_desc, (vop_t *) spec_open }, { &vop_pathconf_desc, (vop_t *) vop_stdpathconf }, { &vop_poll_desc, (vop_t *) spec_poll }, { &vop_kqfilter_desc, (vop_t *) spec_kqfilter }, { &vop_print_desc, (vop_t *) spec_print }, { &vop_read_desc, (vop_t *) spec_read }, { &vop_readdir_desc, (vop_t *) vop_panic }, { &vop_readlink_desc, (vop_t *) vop_panic }, { &vop_reallocblks_desc, (vop_t *) vop_panic }, { &vop_reclaim_desc, (vop_t *) vop_null }, { &vop_remove_desc, (vop_t *) vop_panic }, { &vop_rename_desc, (vop_t *) vop_panic }, { &vop_rmdir_desc, (vop_t *) vop_panic }, { &vop_setattr_desc, (vop_t *) vop_ebadf }, { &vop_strategy_desc, (vop_t *) spec_strategy }, { &vop_symlink_desc, (vop_t *) vop_panic }, { &vop_write_desc, (vop_t *) spec_write }, { NULL, NULL } }; static struct vnodeopv_desc spec_vnodeop_opv_desc = { &spec_vnodeop_p, spec_vnodeop_entries }; VNODEOP_SET(spec_vnodeop_opv_desc); extern int dev_ref_debug; /* * spec_vnoperate(struct vnodeop_desc *a_desc, ...) */ int spec_vnoperate(struct vop_generic_args *ap) { return (VOCALL(spec_vnodeop_p, ap->a_desc->vdesc_offset, ap)); } static void spec_getpages_iodone (struct buf *bp); /* * Open a special file. * * spec_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, * struct thread *a_td) */ /* ARGSUSED */ static int spec_open(struct vop_open_args *ap) { struct vnode *vp = ap->a_vp; dev_t dev; int error; int isblk = (vp->v_type == VBLK) ? 1 : 0; const char *cp; /* * Don't allow open if fs is mounted -nodev. */ if (vp->v_mount && (vp->v_mount->mnt_flag & MNT_NODEV)) return (ENXIO); /* * Resolve the device. If the vnode is already open v_rdev may * already be resolved. However, if the device changes out from * under us we report it (and, for now, we allow it). Since * v_release_rdev() zero's v_opencount, we have to save and restore * it when replacing the rdev reference. */ if (vp->v_rdev != NULL) { dev = udev2dev(vp->v_udev, isblk); if (dev != vp->v_rdev) { int oc = vp->v_opencount; printf( "Warning: spec_open: dev %s was lost", vp->v_rdev->si_name); v_release_rdev(vp); error = v_associate_rdev(vp, udev2dev(vp->v_udev, isblk)); if (error) { printf(", reacquisition failed\n"); } else { vp->v_opencount = oc; printf(", reacquisition successful\n"); } } else { error = 0; } } else { error = v_associate_rdev(vp, udev2dev(vp->v_udev, isblk)); } if (error) return(error); /* * Prevent degenerate open/close sequences from nulling out rdev. */ ++vp->v_opencount; dev = vp->v_rdev; KKASSERT(dev != NULL); /* * Make this field valid before any I/O in ->d_open. XXX the * device itself should probably be required to initialize * this field in d_open. */ if (!dev->si_iosize_max) dev->si_iosize_max = DFLTPHYS; /* * XXX: Disks get special billing here, but it is mostly wrong. * XXX: diskpartitions can overlap and the real checks should * XXX: take this into account, and consequently they need to * XXX: live in the diskslicing code. Some checks do. */ if (vn_isdisk(vp, NULL) && ap->a_cred != FSCRED && (ap->a_mode & FWRITE)) { /* * Never allow opens for write if the device is mounted R/W */ if (vp->v_rdev && vp->v_rdev->si_mountpoint && !(vp->v_rdev->si_mountpoint->mnt_flag & MNT_RDONLY)) { error = EBUSY; goto done; } /* * When running in secure mode, do not allow opens * for writing if the device is mounted */ if (securelevel >= 1 && vfs_mountedon(vp)) { error = EPERM; goto done; } /* * When running in very secure mode, do not allow * opens for writing of any devices. */ if (securelevel >= 2) { error = EPERM; goto done; } } /* XXX: Special casing of ttys for deadfs. Probably redundant */ if (dev_dflags(dev) & D_TTY) vp->v_flag |= VISTTY; /* * dev_dopen() is always called for each open. dev_dclose() is * only called for the last close unless D_TRACKCLOSE is set. */ VOP_UNLOCK(vp, NULL, 0, ap->a_td); error = dev_dopen(dev, ap->a_mode, S_IFCHR, ap->a_td); vn_lock(vp, NULL, LK_EXCLUSIVE | LK_RETRY, ap->a_td); if (error) goto done; if (dev_dflags(dev) & D_TTY) { if (dev->si_tty) { struct tty *tp; tp = dev->si_tty; if (!tp->t_stop) { printf("Warning:%s: no t_stop, using nottystop\n", devtoname(dev)); tp->t_stop = nottystop; } } } if (vn_isdisk(vp, NULL)) { if (!dev->si_bsize_phys) dev->si_bsize_phys = DEV_BSIZE; } if ((dev_dflags(dev) & D_DISK) == 0) { cp = devtoname(dev); if (*cp == '#') { printf("WARNING: driver %s should register devices with make_dev() (dev_t = \"%s\")\n", dev_dname(dev), cp); } } if (dev_ref_debug) printf("spec_open: %s %d\n", dev->si_name, vp->v_opencount); done: if (error) { KKASSERT(vp->v_opencount > 0); if (--vp->v_opencount == 0) v_release_rdev(vp); } return (error); } /* * Vnode op for read * * spec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, * struct ucred *a_cred) */ /* ARGSUSED */ static int spec_read(struct vop_read_args *ap) { struct vnode *vp; struct thread *td; struct uio *uio; dev_t dev; int error; vp = ap->a_vp; dev = vp->v_rdev; uio = ap->a_uio; td = uio->uio_td; if (dev == NULL) /* device was revoked */ return (EBADF); if (uio->uio_resid == 0) return (0); VOP_UNLOCK(vp, NULL, 0, td); error = dev_dread(dev, uio, ap->a_ioflag); vn_lock(vp, NULL, LK_EXCLUSIVE | LK_RETRY, td); return (error); } /* * Vnode op for write * * spec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, * struct ucred *a_cred) */ /* ARGSUSED */ static int spec_write(struct vop_write_args *ap) { struct vnode *vp; struct thread *td; struct uio *uio; dev_t dev; int error; vp = ap->a_vp; dev = vp->v_rdev; uio = ap->a_uio; td = uio->uio_td; if (dev == NULL) /* device was revoked */ return (EBADF); VOP_UNLOCK(vp, NULL, 0, td); error = dev_dwrite(dev, uio, ap->a_ioflag); vn_lock(vp, NULL, LK_EXCLUSIVE | LK_RETRY, td); return (error); } /* * Device ioctl operation. * * spec_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data, * int a_fflag, struct ucred *a_cred, struct thread *a_td) */ /* ARGSUSED */ static int spec_ioctl(struct vop_ioctl_args *ap) { dev_t dev; if ((dev = ap->a_vp->v_rdev) == NULL) return (EBADF); /* device was revoked */ return (dev_dioctl(dev, ap->a_command, ap->a_data, ap->a_fflag, ap->a_td)); } /* * spec_poll(struct vnode *a_vp, int a_events, struct ucred *a_cred, * struct thread *a_td) */ /* ARGSUSED */ static int spec_poll(struct vop_poll_args *ap) { dev_t dev; if ((dev = ap->a_vp->v_rdev) == NULL) return (EBADF); /* device was revoked */ return (dev_dpoll(dev, ap->a_events, ap->a_td)); } /* * spec_kqfilter(struct vnode *a_vp, struct knote *a_kn) */ /* ARGSUSED */ static int spec_kqfilter(struct vop_kqfilter_args *ap) { dev_t dev; if ((dev = ap->a_vp->v_rdev) == NULL) return (EBADF); /* device was revoked */ return (dev_dkqfilter(dev, ap->a_kn)); } /* * Synch buffers associated with a block device * * spec_fsync(struct vnode *a_vp, struct ucred *a_cred, * int a_waitfor, struct thread *a_td) */ /* ARGSUSED */ static int spec_fsync(struct vop_fsync_args *ap) { struct vnode *vp = ap->a_vp; struct buf *bp; struct buf *nbp; int s; int maxretry = 10000; /* large, arbitrarily chosen */ if (!vn_isdisk(vp, NULL)) return (0); loop1: /* * MARK/SCAN initialization to avoid infinite loops */ s = splbio(); for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = TAILQ_NEXT(bp, b_vnbufs)) { bp->b_flags &= ~B_SCANNED; } splx(s); /* * Flush all dirty buffers associated with a block device. */ loop2: s = splbio(); for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { nbp = TAILQ_NEXT(bp, b_vnbufs); if ((bp->b_flags & B_SCANNED) != 0) continue; bp->b_flags |= B_SCANNED; if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) continue; if ((bp->b_flags & B_DELWRI) == 0) panic("spec_fsync: not dirty"); if ((vp->v_flag & VOBJBUF) && (bp->b_flags & B_CLUSTEROK)) { BUF_UNLOCK(bp); vfs_bio_awrite(bp); splx(s); } else { bremfree(bp); splx(s); bawrite(bp); } goto loop2; } /* * If synchronous the caller expects us to completely resolve all * dirty buffers in the system. Wait for in-progress I/O to * complete (which could include background bitmap writes), then * retry if dirty blocks still exist. */ if (ap->a_waitfor == MNT_WAIT) { while (vp->v_numoutput) { vp->v_flag |= VBWAIT; (void) tsleep((caddr_t)&vp->v_numoutput, 0, "spfsyn", 0); } if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) { if (--maxretry != 0) { splx(s); goto loop1; } vprint("spec_fsync: giving up on dirty", vp); } } splx(s); return (0); } /* * spec_inactive(struct vnode *a_vp, struct thread *a_td) */ static int spec_inactive(struct vop_inactive_args *ap) { VOP_UNLOCK(ap->a_vp, NULL, 0, ap->a_td); return (0); } /* * Just call the device strategy routine * * spec_strategy(struct vnode *a_vp, struct buf *a_bp) */ static int spec_strategy(struct vop_strategy_args *ap) { struct buf *bp; struct vnode *vp; struct mount *mp; bp = ap->a_bp; if (((bp->b_flags & B_READ) == 0) && (LIST_FIRST(&bp->b_dep)) != NULL && bioops.io_start) (*bioops.io_start)(bp); /* * Collect statistics on synchronous and asynchronous read * and write counts for disks that have associated filesystems. */ vp = ap->a_vp; KKASSERT(vp->v_rdev != NULL); /* XXX */ if (vn_isdisk(vp, NULL) && (mp = vp->v_rdev->si_mountpoint) != NULL) { if ((bp->b_flags & B_READ) == 0) { if (bp->b_lock.lk_lockholder == LK_KERNTHREAD) mp->mnt_stat.f_asyncwrites++; else mp->mnt_stat.f_syncwrites++; } else { if (bp->b_lock.lk_lockholder == LK_KERNTHREAD) mp->mnt_stat.f_asyncreads++; else mp->mnt_stat.f_syncreads++; } } bp->b_dev = vp->v_rdev; BUF_STRATEGY(bp, 0); return (0); } /* * spec_freeblks(struct vnode *a_vp, daddr_t a_addr, daddr_t a_length) */ static int spec_freeblks(struct vop_freeblks_args *ap) { struct buf *bp; /* * XXX: This assumes that strategy does the deed right away. * XXX: this may not be TRTTD. */ KKASSERT(ap->a_vp->v_rdev != NULL); if ((dev_dflags(ap->a_vp->v_rdev) & D_CANFREE) == 0) return (0); bp = geteblk(ap->a_length); bp->b_flags |= B_FREEBUF; bp->b_dev = ap->a_vp->v_rdev; bp->b_blkno = ap->a_addr; bp->b_offset = dbtob(ap->a_addr); bp->b_bcount = ap->a_length; BUF_STRATEGY(bp, 0); return (0); } /* * Implement degenerate case where the block requested is the block * returned, and assume that the entire device is contiguous in regards * to the contiguous block range (runp and runb). * * spec_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp, * daddr_t *a_bnp, int *a_runp, int *a_runb) */ static int spec_bmap(struct vop_bmap_args *ap) { struct vnode *vp = ap->a_vp; int runp = 0; int runb = 0; if (ap->a_vpp != NULL) *ap->a_vpp = vp; if (ap->a_bnp != NULL) *ap->a_bnp = ap->a_bn; if (vp->v_mount != NULL) runp = runb = MAXBSIZE / vp->v_mount->mnt_stat.f_iosize; if (ap->a_runp != NULL) *ap->a_runp = runp; if (ap->a_runb != NULL) *ap->a_runb = runb; return (0); } /* * Device close routine * * spec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, * struct thread *a_td) */ /* ARGSUSED */ static int spec_close(struct vop_close_args *ap) { struct proc *p = ap->a_td->td_proc; struct vnode *vp = ap->a_vp; dev_t dev = vp->v_rdev; int error; /* * Hack: a tty device that is a controlling terminal * has a reference from the session structure. * We cannot easily tell that a character device is * a controlling terminal, unless it is the closing * process' controlling terminal. In that case, * if the reference count is 2 (this last descriptor * plus the session), release the reference from the session. * * It is possible for v_opencount to be 0 or 1 in this case, 0 * because the tty might have been revoked. */ if (dev) reference_dev(dev); if (vcount(vp) == 2 && vp->v_opencount <= 1 && p && (vp->v_flag & VXLOCK) == 0 && vp == p->p_session->s_ttyvp) { p->p_session->s_ttyvp = NULL; vrele(vp); } /* * Vnodes can be opened and close multiple times. Do not really * close the device unless (1) it is being closed forcibly, * (2) the device wants to track closes, or (3) this is the last * vnode doing its last close on the device. * * XXX the VXLOCK (force close) case can leave vnodes referencing * a closed device. */ if (dev && ((vp->v_flag & VXLOCK) || (dev_dflags(dev) & D_TRACKCLOSE) || (vcount(vp) <= 1 && vp->v_opencount == 1))) { error = dev_dclose(dev, ap->a_fflag, S_IFCHR, ap->a_td); } else { error = 0; } /* * Track the actual opens and closes on the vnode. The last close * disassociates the rdev. If the rdev is already disassociated * the vnode might have been revoked and no further opencount * tracking occurs. */ if (dev) { KKASSERT(vp->v_opencount > 0); if (dev_ref_debug) { printf("spec_close: %s %d\n", dev->si_name, vp->v_opencount - 1); } if (--vp->v_opencount == 0) v_release_rdev(vp); release_dev(dev); } return(error); } /* * Print out the contents of a special device vnode. * * spec_print(struct vnode *a_vp) */ static int spec_print(struct vop_print_args *ap) { printf("tag VT_NON, dev %s\n", devtoname(ap->a_vp->v_rdev)); return (0); } /* * Special device advisory byte-level locks. * * spec_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, * struct flock *a_fl, int a_flags) */ /* ARGSUSED */ static int spec_advlock(struct vop_advlock_args *ap) { return (ap->a_flags & F_FLOCK ? EOPNOTSUPP : EINVAL); } static void spec_getpages_iodone(struct buf *bp) { bp->b_flags |= B_DONE; wakeup(bp); } static int spec_getpages(struct vop_getpages_args *ap) { vm_offset_t kva; int error; int i, pcount, size, s; daddr_t blkno; struct buf *bp; vm_page_t m; vm_ooffset_t offset; int toff, nextoff, nread; struct vnode *vp = ap->a_vp; int blksiz; int gotreqpage; error = 0; pcount = round_page(ap->a_count) / PAGE_SIZE; /* * Calculate the offset of the transfer and do sanity check. * FreeBSD currently only supports an 8 TB range due to b_blkno * being in DEV_BSIZE ( usually 512 ) byte chunks on call to * VOP_STRATEGY. XXX */ offset = IDX_TO_OFF(ap->a_m[0]->pindex) + ap->a_offset; #define DADDR_T_BIT (sizeof(daddr_t)*8) #define OFFSET_MAX ((1LL << (DADDR_T_BIT + DEV_BSHIFT)) - 1) if (offset < 0 || offset > OFFSET_MAX) { /* XXX still no %q in kernel. */ printf("spec_getpages: preposterous offset 0x%x%08x\n", (u_int)((u_quad_t)offset >> 32), (u_int)(offset & 0xffffffff)); return (VM_PAGER_ERROR); } blkno = btodb(offset); /* * Round up physical size for real devices. We cannot round using * v_mount's block size data because v_mount has nothing to do with * the device. i.e. it's usually '/dev'. We need the physical block * size for the device itself. * * We can't use v_rdev->si_mountpoint because it only exists when the * block device is mounted. However, we can use v_rdev. */ if (vn_isdisk(vp, NULL)) blksiz = vp->v_rdev->si_bsize_phys; else blksiz = DEV_BSIZE; size = (ap->a_count + blksiz - 1) & ~(blksiz - 1); bp = getpbuf(NULL); kva = (vm_offset_t)bp->b_data; /* * Map the pages to be read into the kva. */ pmap_qenter(kva, ap->a_m, pcount); /* Build a minimal buffer header. */ bp->b_flags = B_READ | B_CALL; bp->b_iodone = spec_getpages_iodone; /* B_PHYS is not set, but it is nice to fill this in. */ bp->b_blkno = blkno; bp->b_lblkno = blkno; pbgetvp(ap->a_vp, bp); bp->b_bcount = size; bp->b_bufsize = size; bp->b_resid = 0; bp->b_runningbufspace = bp->b_bufsize; runningbufspace += bp->b_runningbufspace; mycpu->gd_cnt.v_vnodein++; mycpu->gd_cnt.v_vnodepgsin += pcount; /* Do the input. */ VOP_STRATEGY(bp->b_vp, bp); s = splbio(); /* We definitely need to be at splbio here. */ while ((bp->b_flags & B_DONE) == 0) { tsleep(bp, 0, "spread", 0); } splx(s); if ((bp->b_flags & B_ERROR) != 0) { if (bp->b_error) error = bp->b_error; else error = EIO; } nread = size - bp->b_resid; if (nread < ap->a_count) { bzero((caddr_t)kva + nread, ap->a_count - nread); } pmap_qremove(kva, pcount); gotreqpage = 0; for (i = 0, toff = 0; i < pcount; i++, toff = nextoff) { nextoff = toff + PAGE_SIZE; m = ap->a_m[i]; m->flags &= ~PG_ZERO; if (nextoff <= nread) { m->valid = VM_PAGE_BITS_ALL; vm_page_undirty(m); } else if (toff < nread) { /* * Since this is a VM request, we have to supply the * unaligned offset to allow vm_page_set_validclean() * to zero sub-DEV_BSIZE'd portions of the page. */ vm_page_set_validclean(m, 0, nread - toff); } else { m->valid = 0; vm_page_undirty(m); } if (i != ap->a_reqpage) { /* * Just in case someone was asking for this page we * now tell them that it is ok to use. */ if (!error || (m->valid == VM_PAGE_BITS_ALL)) { if (m->valid) { if (m->flags & PG_WANTED) { vm_page_activate(m); } else { vm_page_deactivate(m); } vm_page_wakeup(m); } else { vm_page_free(m); } } else { vm_page_free(m); } } else if (m->valid) { gotreqpage = 1; /* * Since this is a VM request, we need to make the * entire page presentable by zeroing invalid sections. */ if (m->valid != VM_PAGE_BITS_ALL) vm_page_zero_invalid(m, FALSE); } } if (!gotreqpage) { m = ap->a_m[ap->a_reqpage]; printf( "spec_getpages:(%s) I/O read failure: (error=%d) bp %p vp %p\n", devtoname(bp->b_dev), error, bp, bp->b_vp); printf( " size: %d, resid: %ld, a_count: %d, valid: 0x%x\n", size, bp->b_resid, ap->a_count, m->valid); printf( " nread: %d, reqpage: %d, pindex: %lu, pcount: %d\n", nread, ap->a_reqpage, (u_long)m->pindex, pcount); /* * Free the buffer header back to the swap buffer pool. */ relpbuf(bp, NULL); return VM_PAGER_ERROR; } /* * Free the buffer header back to the swap buffer pool. */ relpbuf(bp, NULL); return VM_PAGER_OK; }