1df8bae1dSRodney W. Grimes /* 2df8bae1dSRodney W. Grimes * Copyright (c) 1989, 1993 3df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 4df8bae1dSRodney W. Grimes * (c) UNIX System Laboratories, Inc. 5df8bae1dSRodney W. Grimes * All or some portions of this file are derived from material licensed 6df8bae1dSRodney W. Grimes * to the University of California by American Telephone and Telegraph 7df8bae1dSRodney W. Grimes * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8df8bae1dSRodney W. Grimes * the permission of UNIX System Laboratories, Inc. 9df8bae1dSRodney W. Grimes * 10df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 11df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 12df8bae1dSRodney W. Grimes * are met: 13df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 14df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 15df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 16df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 17df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 18df8bae1dSRodney W. Grimes * 3. All advertising materials mentioning features or use of this software 19df8bae1dSRodney W. Grimes * must display the following acknowledgement: 20df8bae1dSRodney W. Grimes * This product includes software developed by the University of 21df8bae1dSRodney W. Grimes * California, Berkeley and its contributors. 22df8bae1dSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 23df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 24df8bae1dSRodney W. Grimes * without specific prior written permission. 25df8bae1dSRodney W. Grimes * 26df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36df8bae1dSRodney W. Grimes * SUCH DAMAGE. 37df8bae1dSRodney W. Grimes * 38df8bae1dSRodney W. Grimes * @(#)vfs_subr.c 8.13 (Berkeley) 4/18/94 39df8bae1dSRodney W. Grimes */ 40df8bae1dSRodney W. Grimes 41df8bae1dSRodney W. Grimes /* 42df8bae1dSRodney W. Grimes * External virtual filesystem routines 43df8bae1dSRodney W. Grimes */ 44df8bae1dSRodney W. Grimes 45df8bae1dSRodney W. Grimes #include <sys/param.h> 46df8bae1dSRodney W. Grimes #include <sys/systm.h> 47df8bae1dSRodney W. Grimes #include <sys/proc.h> 48df8bae1dSRodney W. Grimes #include <sys/mount.h> 49df8bae1dSRodney W. Grimes #include <sys/time.h> 50df8bae1dSRodney W. Grimes #include <sys/vnode.h> 51df8bae1dSRodney W. Grimes #include <sys/stat.h> 52df8bae1dSRodney W. Grimes #include <sys/namei.h> 53df8bae1dSRodney W. Grimes #include <sys/ucred.h> 54df8bae1dSRodney W. Grimes #include <sys/buf.h> 55df8bae1dSRodney W. Grimes #include <sys/errno.h> 56df8bae1dSRodney W. Grimes #include <sys/malloc.h> 57df8bae1dSRodney W. Grimes #include <sys/domain.h> 58df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 59df8bae1dSRodney W. Grimes 60df8bae1dSRodney W. Grimes #include <vm/vm.h> 61df8bae1dSRodney W. Grimes #include <sys/sysctl.h> 62df8bae1dSRodney W. Grimes 63df8bae1dSRodney W. Grimes #include <miscfs/specfs/specdev.h> 64df8bae1dSRodney W. Grimes 65df8bae1dSRodney W. Grimes enum vtype iftovt_tab[16] = { 66df8bae1dSRodney W. Grimes VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, 67df8bae1dSRodney W. Grimes VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, 68df8bae1dSRodney W. Grimes }; 69df8bae1dSRodney W. Grimes int vttoif_tab[9] = { 70df8bae1dSRodney W. Grimes 0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, 71df8bae1dSRodney W. Grimes S_IFSOCK, S_IFIFO, S_IFMT, 72df8bae1dSRodney W. Grimes }; 73df8bae1dSRodney W. Grimes 74df8bae1dSRodney W. Grimes /* 75df8bae1dSRodney W. Grimes * Insq/Remq for the vnode usage lists. 76df8bae1dSRodney W. Grimes */ 77df8bae1dSRodney W. Grimes #define bufinsvn(bp, dp) LIST_INSERT_HEAD(dp, bp, b_vnbufs) 78df8bae1dSRodney W. Grimes #define bufremvn(bp) { \ 79df8bae1dSRodney W. Grimes LIST_REMOVE(bp, b_vnbufs); \ 80df8bae1dSRodney W. Grimes (bp)->b_vnbufs.le_next = NOLIST; \ 81df8bae1dSRodney W. Grimes } 82df8bae1dSRodney W. Grimes 83df8bae1dSRodney W. Grimes TAILQ_HEAD(freelst, vnode) vnode_free_list; /* vnode free list */ 84df8bae1dSRodney W. Grimes struct mntlist mountlist; /* mounted filesystem list */ 85df8bae1dSRodney W. Grimes 86df8bae1dSRodney W. Grimes /* 87df8bae1dSRodney W. Grimes * Initialize the vnode management data structures. 88df8bae1dSRodney W. Grimes */ 89df8bae1dSRodney W. Grimes vntblinit() 90df8bae1dSRodney W. Grimes { 91df8bae1dSRodney W. Grimes 92df8bae1dSRodney W. Grimes TAILQ_INIT(&vnode_free_list); 93df8bae1dSRodney W. Grimes TAILQ_INIT(&mountlist); 94df8bae1dSRodney W. Grimes } 95df8bae1dSRodney W. Grimes 96df8bae1dSRodney W. Grimes /* 97df8bae1dSRodney W. Grimes * Lock a filesystem. 98df8bae1dSRodney W. Grimes * Used to prevent access to it while mounting and unmounting. 99df8bae1dSRodney W. Grimes */ 100df8bae1dSRodney W. Grimes vfs_lock(mp) 101df8bae1dSRodney W. Grimes register struct mount *mp; 102df8bae1dSRodney W. Grimes { 103df8bae1dSRodney W. Grimes 104df8bae1dSRodney W. Grimes while(mp->mnt_flag & MNT_MLOCK) { 105df8bae1dSRodney W. Grimes mp->mnt_flag |= MNT_MWAIT; 106df8bae1dSRodney W. Grimes sleep((caddr_t)mp, PVFS); 107df8bae1dSRodney W. Grimes } 108df8bae1dSRodney W. Grimes mp->mnt_flag |= MNT_MLOCK; 109df8bae1dSRodney W. Grimes return (0); 110df8bae1dSRodney W. Grimes } 111df8bae1dSRodney W. Grimes 112df8bae1dSRodney W. Grimes /* 113df8bae1dSRodney W. Grimes * Unlock a locked filesystem. 114df8bae1dSRodney W. Grimes * Panic if filesystem is not locked. 115df8bae1dSRodney W. Grimes */ 116df8bae1dSRodney W. Grimes void 117df8bae1dSRodney W. Grimes vfs_unlock(mp) 118df8bae1dSRodney W. Grimes register struct mount *mp; 119df8bae1dSRodney W. Grimes { 120df8bae1dSRodney W. Grimes 121df8bae1dSRodney W. Grimes if ((mp->mnt_flag & MNT_MLOCK) == 0) 122df8bae1dSRodney W. Grimes panic("vfs_unlock: not locked"); 123df8bae1dSRodney W. Grimes mp->mnt_flag &= ~MNT_MLOCK; 124df8bae1dSRodney W. Grimes if (mp->mnt_flag & MNT_MWAIT) { 125df8bae1dSRodney W. Grimes mp->mnt_flag &= ~MNT_MWAIT; 126df8bae1dSRodney W. Grimes wakeup((caddr_t)mp); 127df8bae1dSRodney W. Grimes } 128df8bae1dSRodney W. Grimes } 129df8bae1dSRodney W. Grimes 130df8bae1dSRodney W. Grimes /* 131df8bae1dSRodney W. Grimes * Mark a mount point as busy. 132df8bae1dSRodney W. Grimes * Used to synchronize access and to delay unmounting. 133df8bae1dSRodney W. Grimes */ 134df8bae1dSRodney W. Grimes vfs_busy(mp) 135df8bae1dSRodney W. Grimes register struct mount *mp; 136df8bae1dSRodney W. Grimes { 137df8bae1dSRodney W. Grimes 138df8bae1dSRodney W. Grimes while(mp->mnt_flag & MNT_MPBUSY) { 139df8bae1dSRodney W. Grimes mp->mnt_flag |= MNT_MPWANT; 140df8bae1dSRodney W. Grimes sleep((caddr_t)&mp->mnt_flag, PVFS); 141df8bae1dSRodney W. Grimes } 142df8bae1dSRodney W. Grimes if (mp->mnt_flag & MNT_UNMOUNT) 143df8bae1dSRodney W. Grimes return (1); 144df8bae1dSRodney W. Grimes mp->mnt_flag |= MNT_MPBUSY; 145df8bae1dSRodney W. Grimes return (0); 146df8bae1dSRodney W. Grimes } 147df8bae1dSRodney W. Grimes 148df8bae1dSRodney W. Grimes /* 149df8bae1dSRodney W. Grimes * Free a busy filesystem. 150df8bae1dSRodney W. Grimes * Panic if filesystem is not busy. 151df8bae1dSRodney W. Grimes */ 152df8bae1dSRodney W. Grimes vfs_unbusy(mp) 153df8bae1dSRodney W. Grimes register struct mount *mp; 154df8bae1dSRodney W. Grimes { 155df8bae1dSRodney W. Grimes 156df8bae1dSRodney W. Grimes if ((mp->mnt_flag & MNT_MPBUSY) == 0) 157df8bae1dSRodney W. Grimes panic("vfs_unbusy: not busy"); 158df8bae1dSRodney W. Grimes mp->mnt_flag &= ~MNT_MPBUSY; 159df8bae1dSRodney W. Grimes if (mp->mnt_flag & MNT_MPWANT) { 160df8bae1dSRodney W. Grimes mp->mnt_flag &= ~MNT_MPWANT; 161df8bae1dSRodney W. Grimes wakeup((caddr_t)&mp->mnt_flag); 162df8bae1dSRodney W. Grimes } 163df8bae1dSRodney W. Grimes } 164df8bae1dSRodney W. Grimes 165df8bae1dSRodney W. Grimes /* 166df8bae1dSRodney W. Grimes * Lookup a mount point by filesystem identifier. 167df8bae1dSRodney W. Grimes */ 168df8bae1dSRodney W. Grimes struct mount * 169df8bae1dSRodney W. Grimes getvfs(fsid) 170df8bae1dSRodney W. Grimes fsid_t *fsid; 171df8bae1dSRodney W. Grimes { 172df8bae1dSRodney W. Grimes register struct mount *mp; 173df8bae1dSRodney W. Grimes 174df8bae1dSRodney W. Grimes for (mp = mountlist.tqh_first; mp != NULL; mp = mp->mnt_list.tqe_next) { 175df8bae1dSRodney W. Grimes if (mp->mnt_stat.f_fsid.val[0] == fsid->val[0] && 176df8bae1dSRodney W. Grimes mp->mnt_stat.f_fsid.val[1] == fsid->val[1]) 177df8bae1dSRodney W. Grimes return (mp); 178df8bae1dSRodney W. Grimes } 179df8bae1dSRodney W. Grimes return ((struct mount *)0); 180df8bae1dSRodney W. Grimes } 181df8bae1dSRodney W. Grimes 182df8bae1dSRodney W. Grimes /* 183df8bae1dSRodney W. Grimes * Get a new unique fsid 184df8bae1dSRodney W. Grimes */ 185df8bae1dSRodney W. Grimes void 186df8bae1dSRodney W. Grimes getnewfsid(mp, mtype) 187df8bae1dSRodney W. Grimes struct mount *mp; 188df8bae1dSRodney W. Grimes int mtype; 189df8bae1dSRodney W. Grimes { 190df8bae1dSRodney W. Grimes static u_short xxxfs_mntid; 191df8bae1dSRodney W. Grimes 192df8bae1dSRodney W. Grimes fsid_t tfsid; 193df8bae1dSRodney W. Grimes 194df8bae1dSRodney W. Grimes mp->mnt_stat.f_fsid.val[0] = makedev(nblkdev + mtype, 0); 195df8bae1dSRodney W. Grimes mp->mnt_stat.f_fsid.val[1] = mtype; 196df8bae1dSRodney W. Grimes if (xxxfs_mntid == 0) 197df8bae1dSRodney W. Grimes ++xxxfs_mntid; 198df8bae1dSRodney W. Grimes tfsid.val[0] = makedev(nblkdev + mtype, xxxfs_mntid); 199df8bae1dSRodney W. Grimes tfsid.val[1] = mtype; 200df8bae1dSRodney W. Grimes if (mountlist.tqh_first != NULL) { 201df8bae1dSRodney W. Grimes while (getvfs(&tfsid)) { 202df8bae1dSRodney W. Grimes tfsid.val[0]++; 203df8bae1dSRodney W. Grimes xxxfs_mntid++; 204df8bae1dSRodney W. Grimes } 205df8bae1dSRodney W. Grimes } 206df8bae1dSRodney W. Grimes mp->mnt_stat.f_fsid.val[0] = tfsid.val[0]; 207df8bae1dSRodney W. Grimes } 208df8bae1dSRodney W. Grimes 209df8bae1dSRodney W. Grimes /* 210df8bae1dSRodney W. Grimes * Set vnode attributes to VNOVAL 211df8bae1dSRodney W. Grimes */ 212df8bae1dSRodney W. Grimes void vattr_null(vap) 213df8bae1dSRodney W. Grimes register struct vattr *vap; 214df8bae1dSRodney W. Grimes { 215df8bae1dSRodney W. Grimes 216df8bae1dSRodney W. Grimes vap->va_type = VNON; 217df8bae1dSRodney W. Grimes vap->va_size = vap->va_bytes = VNOVAL; 218df8bae1dSRodney W. Grimes vap->va_mode = vap->va_nlink = vap->va_uid = vap->va_gid = 219df8bae1dSRodney W. Grimes vap->va_fsid = vap->va_fileid = 220df8bae1dSRodney W. Grimes vap->va_blocksize = vap->va_rdev = 221df8bae1dSRodney W. Grimes vap->va_atime.ts_sec = vap->va_atime.ts_nsec = 222df8bae1dSRodney W. Grimes vap->va_mtime.ts_sec = vap->va_mtime.ts_nsec = 223df8bae1dSRodney W. Grimes vap->va_ctime.ts_sec = vap->va_ctime.ts_nsec = 224df8bae1dSRodney W. Grimes vap->va_flags = vap->va_gen = VNOVAL; 225df8bae1dSRodney W. Grimes vap->va_vaflags = 0; 226df8bae1dSRodney W. Grimes } 227df8bae1dSRodney W. Grimes 228df8bae1dSRodney W. Grimes /* 229df8bae1dSRodney W. Grimes * Routines having to do with the management of the vnode table. 230df8bae1dSRodney W. Grimes */ 231df8bae1dSRodney W. Grimes extern int (**dead_vnodeop_p)(); 232df8bae1dSRodney W. Grimes extern void vclean(); 233df8bae1dSRodney W. Grimes long numvnodes; 234df8bae1dSRodney W. Grimes extern struct vattr va_null; 235df8bae1dSRodney W. Grimes 236df8bae1dSRodney W. Grimes /* 237df8bae1dSRodney W. Grimes * Return the next vnode from the free list. 238df8bae1dSRodney W. Grimes */ 239df8bae1dSRodney W. Grimes getnewvnode(tag, mp, vops, vpp) 240df8bae1dSRodney W. Grimes enum vtagtype tag; 241df8bae1dSRodney W. Grimes struct mount *mp; 242df8bae1dSRodney W. Grimes int (**vops)(); 243df8bae1dSRodney W. Grimes struct vnode **vpp; 244df8bae1dSRodney W. Grimes { 245df8bae1dSRodney W. Grimes register struct vnode *vp; 246df8bae1dSRodney W. Grimes int s; 247df8bae1dSRodney W. Grimes 248df8bae1dSRodney W. Grimes if ((vnode_free_list.tqh_first == NULL && 249df8bae1dSRodney W. Grimes numvnodes < 2 * desiredvnodes) || 250df8bae1dSRodney W. Grimes numvnodes < desiredvnodes) { 251df8bae1dSRodney W. Grimes vp = (struct vnode *)malloc((u_long)sizeof *vp, 252df8bae1dSRodney W. Grimes M_VNODE, M_WAITOK); 253df8bae1dSRodney W. Grimes bzero((char *)vp, sizeof *vp); 254df8bae1dSRodney W. Grimes numvnodes++; 255df8bae1dSRodney W. Grimes } else { 256df8bae1dSRodney W. Grimes if ((vp = vnode_free_list.tqh_first) == NULL) { 257df8bae1dSRodney W. Grimes tablefull("vnode"); 258df8bae1dSRodney W. Grimes *vpp = 0; 259df8bae1dSRodney W. Grimes return (ENFILE); 260df8bae1dSRodney W. Grimes } 261df8bae1dSRodney W. Grimes if (vp->v_usecount) 262df8bae1dSRodney W. Grimes panic("free vnode isn't"); 263df8bae1dSRodney W. Grimes TAILQ_REMOVE(&vnode_free_list, vp, v_freelist); 264df8bae1dSRodney W. Grimes /* see comment on why 0xdeadb is set at end of vgone (below) */ 265df8bae1dSRodney W. Grimes vp->v_freelist.tqe_prev = (struct vnode **)0xdeadb; 266df8bae1dSRodney W. Grimes vp->v_lease = NULL; 267df8bae1dSRodney W. Grimes if (vp->v_type != VBAD) 268df8bae1dSRodney W. Grimes vgone(vp); 269df8bae1dSRodney W. Grimes #ifdef DIAGNOSTIC 270df8bae1dSRodney W. Grimes if (vp->v_data) 271df8bae1dSRodney W. Grimes panic("cleaned vnode isn't"); 272df8bae1dSRodney W. Grimes s = splbio(); 273df8bae1dSRodney W. Grimes if (vp->v_numoutput) 274df8bae1dSRodney W. Grimes panic("Clean vnode has pending I/O's"); 275df8bae1dSRodney W. Grimes splx(s); 276df8bae1dSRodney W. Grimes #endif 277df8bae1dSRodney W. Grimes vp->v_flag = 0; 278df8bae1dSRodney W. Grimes vp->v_lastr = 0; 279df8bae1dSRodney W. Grimes vp->v_ralen = 0; 280df8bae1dSRodney W. Grimes vp->v_maxra = 0; 281df8bae1dSRodney W. Grimes vp->v_lastw = 0; 282df8bae1dSRodney W. Grimes vp->v_lasta = 0; 283df8bae1dSRodney W. Grimes vp->v_cstart = 0; 284df8bae1dSRodney W. Grimes vp->v_clen = 0; 285df8bae1dSRodney W. Grimes vp->v_socket = 0; 286df8bae1dSRodney W. Grimes } 287df8bae1dSRodney W. Grimes vp->v_type = VNON; 288df8bae1dSRodney W. Grimes cache_purge(vp); 289df8bae1dSRodney W. Grimes vp->v_tag = tag; 290df8bae1dSRodney W. Grimes vp->v_op = vops; 291df8bae1dSRodney W. Grimes insmntque(vp, mp); 292df8bae1dSRodney W. Grimes *vpp = vp; 293df8bae1dSRodney W. Grimes vp->v_usecount = 1; 294df8bae1dSRodney W. Grimes vp->v_data = 0; 295df8bae1dSRodney W. Grimes return (0); 296df8bae1dSRodney W. Grimes } 297df8bae1dSRodney W. Grimes 298df8bae1dSRodney W. Grimes /* 299df8bae1dSRodney W. Grimes * Move a vnode from one mount queue to another. 300df8bae1dSRodney W. Grimes */ 301df8bae1dSRodney W. Grimes insmntque(vp, mp) 302df8bae1dSRodney W. Grimes register struct vnode *vp; 303df8bae1dSRodney W. Grimes register struct mount *mp; 304df8bae1dSRodney W. Grimes { 305df8bae1dSRodney W. Grimes 306df8bae1dSRodney W. Grimes /* 307df8bae1dSRodney W. Grimes * Delete from old mount point vnode list, if on one. 308df8bae1dSRodney W. Grimes */ 309df8bae1dSRodney W. Grimes if (vp->v_mount != NULL) 310df8bae1dSRodney W. Grimes LIST_REMOVE(vp, v_mntvnodes); 311df8bae1dSRodney W. Grimes /* 312df8bae1dSRodney W. Grimes * Insert into list of vnodes for the new mount point, if available. 313df8bae1dSRodney W. Grimes */ 314df8bae1dSRodney W. Grimes if ((vp->v_mount = mp) == NULL) 315df8bae1dSRodney W. Grimes return; 316df8bae1dSRodney W. Grimes LIST_INSERT_HEAD(&mp->mnt_vnodelist, vp, v_mntvnodes); 317df8bae1dSRodney W. Grimes } 318df8bae1dSRodney W. Grimes 319df8bae1dSRodney W. Grimes /* 320df8bae1dSRodney W. Grimes * Update outstanding I/O count and do wakeup if requested. 321df8bae1dSRodney W. Grimes */ 322df8bae1dSRodney W. Grimes vwakeup(bp) 323df8bae1dSRodney W. Grimes register struct buf *bp; 324df8bae1dSRodney W. Grimes { 325df8bae1dSRodney W. Grimes register struct vnode *vp; 326df8bae1dSRodney W. Grimes 327df8bae1dSRodney W. Grimes bp->b_flags &= ~B_WRITEINPROG; 328df8bae1dSRodney W. Grimes if (vp = bp->b_vp) { 329df8bae1dSRodney W. Grimes vp->v_numoutput--; 330df8bae1dSRodney W. Grimes if (vp->v_numoutput < 0) 331df8bae1dSRodney W. Grimes panic("vwakeup: neg numoutput"); 332df8bae1dSRodney W. Grimes if ((vp->v_flag & VBWAIT) && vp->v_numoutput <= 0) { 333df8bae1dSRodney W. Grimes if (vp->v_numoutput < 0) 334df8bae1dSRodney W. Grimes panic("vwakeup: neg numoutput"); 335df8bae1dSRodney W. Grimes vp->v_flag &= ~VBWAIT; 336df8bae1dSRodney W. Grimes wakeup((caddr_t)&vp->v_numoutput); 337df8bae1dSRodney W. Grimes } 338df8bae1dSRodney W. Grimes } 339df8bae1dSRodney W. Grimes } 340df8bae1dSRodney W. Grimes 341df8bae1dSRodney W. Grimes /* 342df8bae1dSRodney W. Grimes * Flush out and invalidate all buffers associated with a vnode. 343df8bae1dSRodney W. Grimes * Called with the underlying object locked. 344df8bae1dSRodney W. Grimes */ 345df8bae1dSRodney W. Grimes int 346df8bae1dSRodney W. Grimes vinvalbuf(vp, flags, cred, p, slpflag, slptimeo) 347df8bae1dSRodney W. Grimes register struct vnode *vp; 348df8bae1dSRodney W. Grimes int flags; 349df8bae1dSRodney W. Grimes struct ucred *cred; 350df8bae1dSRodney W. Grimes struct proc *p; 351df8bae1dSRodney W. Grimes int slpflag, slptimeo; 352df8bae1dSRodney W. Grimes { 353df8bae1dSRodney W. Grimes register struct buf *bp; 354df8bae1dSRodney W. Grimes struct buf *nbp, *blist; 355df8bae1dSRodney W. Grimes int s, error; 356df8bae1dSRodney W. Grimes 357df8bae1dSRodney W. Grimes if (flags & V_SAVE) { 358df8bae1dSRodney W. Grimes if (error = VOP_FSYNC(vp, cred, MNT_WAIT, p)) 359df8bae1dSRodney W. Grimes return (error); 360df8bae1dSRodney W. Grimes if (vp->v_dirtyblkhd.lh_first != NULL) 361df8bae1dSRodney W. Grimes panic("vinvalbuf: dirty bufs"); 362df8bae1dSRodney W. Grimes } 363df8bae1dSRodney W. Grimes for (;;) { 364df8bae1dSRodney W. Grimes if ((blist = vp->v_cleanblkhd.lh_first) && flags & V_SAVEMETA) 365df8bae1dSRodney W. Grimes while (blist && blist->b_lblkno < 0) 366df8bae1dSRodney W. Grimes blist = blist->b_vnbufs.le_next; 367df8bae1dSRodney W. Grimes if (!blist && (blist = vp->v_dirtyblkhd.lh_first) && 368df8bae1dSRodney W. Grimes (flags & V_SAVEMETA)) 369df8bae1dSRodney W. Grimes while (blist && blist->b_lblkno < 0) 370df8bae1dSRodney W. Grimes blist = blist->b_vnbufs.le_next; 371df8bae1dSRodney W. Grimes if (!blist) 372df8bae1dSRodney W. Grimes break; 373df8bae1dSRodney W. Grimes 374df8bae1dSRodney W. Grimes for (bp = blist; bp; bp = nbp) { 375df8bae1dSRodney W. Grimes nbp = bp->b_vnbufs.le_next; 376df8bae1dSRodney W. Grimes if (flags & V_SAVEMETA && bp->b_lblkno < 0) 377df8bae1dSRodney W. Grimes continue; 378df8bae1dSRodney W. Grimes s = splbio(); 379df8bae1dSRodney W. Grimes if (bp->b_flags & B_BUSY) { 380df8bae1dSRodney W. Grimes bp->b_flags |= B_WANTED; 381df8bae1dSRodney W. Grimes error = tsleep((caddr_t)bp, 382df8bae1dSRodney W. Grimes slpflag | (PRIBIO + 1), "vinvalbuf", 383df8bae1dSRodney W. Grimes slptimeo); 384df8bae1dSRodney W. Grimes splx(s); 385df8bae1dSRodney W. Grimes if (error) 386df8bae1dSRodney W. Grimes return (error); 387df8bae1dSRodney W. Grimes break; 388df8bae1dSRodney W. Grimes } 389df8bae1dSRodney W. Grimes bremfree(bp); 390df8bae1dSRodney W. Grimes bp->b_flags |= B_BUSY; 391df8bae1dSRodney W. Grimes splx(s); 392df8bae1dSRodney W. Grimes /* 393df8bae1dSRodney W. Grimes * XXX Since there are no node locks for NFS, I believe 394df8bae1dSRodney W. Grimes * there is a slight chance that a delayed write will 395df8bae1dSRodney W. Grimes * occur while sleeping just above, so check for it. 396df8bae1dSRodney W. Grimes */ 397df8bae1dSRodney W. Grimes if ((bp->b_flags & B_DELWRI) && (flags & V_SAVE)) { 398df8bae1dSRodney W. Grimes (void) VOP_BWRITE(bp); 399df8bae1dSRodney W. Grimes break; 400df8bae1dSRodney W. Grimes } 401df8bae1dSRodney W. Grimes bp->b_flags |= B_INVAL; 402df8bae1dSRodney W. Grimes brelse(bp); 403df8bae1dSRodney W. Grimes } 404df8bae1dSRodney W. Grimes } 405df8bae1dSRodney W. Grimes if (!(flags & V_SAVEMETA) && 406df8bae1dSRodney W. Grimes (vp->v_dirtyblkhd.lh_first || vp->v_cleanblkhd.lh_first)) 407df8bae1dSRodney W. Grimes panic("vinvalbuf: flush failed"); 408df8bae1dSRodney W. Grimes return (0); 409df8bae1dSRodney W. Grimes } 410df8bae1dSRodney W. Grimes 411df8bae1dSRodney W. Grimes /* 412df8bae1dSRodney W. Grimes * Associate a buffer with a vnode. 413df8bae1dSRodney W. Grimes */ 414df8bae1dSRodney W. Grimes bgetvp(vp, bp) 415df8bae1dSRodney W. Grimes register struct vnode *vp; 416df8bae1dSRodney W. Grimes register struct buf *bp; 417df8bae1dSRodney W. Grimes { 418df8bae1dSRodney W. Grimes 419df8bae1dSRodney W. Grimes if (bp->b_vp) 420df8bae1dSRodney W. Grimes panic("bgetvp: not free"); 421df8bae1dSRodney W. Grimes VHOLD(vp); 422df8bae1dSRodney W. Grimes bp->b_vp = vp; 423df8bae1dSRodney W. Grimes if (vp->v_type == VBLK || vp->v_type == VCHR) 424df8bae1dSRodney W. Grimes bp->b_dev = vp->v_rdev; 425df8bae1dSRodney W. Grimes else 426df8bae1dSRodney W. Grimes bp->b_dev = NODEV; 427df8bae1dSRodney W. Grimes /* 428df8bae1dSRodney W. Grimes * Insert onto list for new vnode. 429df8bae1dSRodney W. Grimes */ 430df8bae1dSRodney W. Grimes bufinsvn(bp, &vp->v_cleanblkhd); 431df8bae1dSRodney W. Grimes } 432df8bae1dSRodney W. Grimes 433df8bae1dSRodney W. Grimes /* 434df8bae1dSRodney W. Grimes * Disassociate a buffer from a vnode. 435df8bae1dSRodney W. Grimes */ 436df8bae1dSRodney W. Grimes brelvp(bp) 437df8bae1dSRodney W. Grimes register struct buf *bp; 438df8bae1dSRodney W. Grimes { 439df8bae1dSRodney W. Grimes struct vnode *vp; 440df8bae1dSRodney W. Grimes 441df8bae1dSRodney W. Grimes if (bp->b_vp == (struct vnode *) 0) 442df8bae1dSRodney W. Grimes panic("brelvp: NULL"); 443df8bae1dSRodney W. Grimes /* 444df8bae1dSRodney W. Grimes * Delete from old vnode list, if on one. 445df8bae1dSRodney W. Grimes */ 446df8bae1dSRodney W. Grimes if (bp->b_vnbufs.le_next != NOLIST) 447df8bae1dSRodney W. Grimes bufremvn(bp); 448df8bae1dSRodney W. Grimes vp = bp->b_vp; 449df8bae1dSRodney W. Grimes bp->b_vp = (struct vnode *) 0; 450df8bae1dSRodney W. Grimes HOLDRELE(vp); 451df8bae1dSRodney W. Grimes } 452df8bae1dSRodney W. Grimes 453df8bae1dSRodney W. Grimes /* 454df8bae1dSRodney W. Grimes * Reassign a buffer from one vnode to another. 455df8bae1dSRodney W. Grimes * Used to assign file specific control information 456df8bae1dSRodney W. Grimes * (indirect blocks) to the vnode to which they belong. 457df8bae1dSRodney W. Grimes */ 458df8bae1dSRodney W. Grimes reassignbuf(bp, newvp) 459df8bae1dSRodney W. Grimes register struct buf *bp; 460df8bae1dSRodney W. Grimes register struct vnode *newvp; 461df8bae1dSRodney W. Grimes { 462df8bae1dSRodney W. Grimes register struct buflists *listheadp; 463df8bae1dSRodney W. Grimes 464df8bae1dSRodney W. Grimes if (newvp == NULL) { 465df8bae1dSRodney W. Grimes printf("reassignbuf: NULL"); 466df8bae1dSRodney W. Grimes return; 467df8bae1dSRodney W. Grimes } 468df8bae1dSRodney W. Grimes /* 469df8bae1dSRodney W. Grimes * Delete from old vnode list, if on one. 470df8bae1dSRodney W. Grimes */ 471df8bae1dSRodney W. Grimes if (bp->b_vnbufs.le_next != NOLIST) 472df8bae1dSRodney W. Grimes bufremvn(bp); 473df8bae1dSRodney W. Grimes /* 474df8bae1dSRodney W. Grimes * If dirty, put on list of dirty buffers; 475df8bae1dSRodney W. Grimes * otherwise insert onto list of clean buffers. 476df8bae1dSRodney W. Grimes */ 477df8bae1dSRodney W. Grimes if (bp->b_flags & B_DELWRI) 478df8bae1dSRodney W. Grimes listheadp = &newvp->v_dirtyblkhd; 479df8bae1dSRodney W. Grimes else 480df8bae1dSRodney W. Grimes listheadp = &newvp->v_cleanblkhd; 481df8bae1dSRodney W. Grimes bufinsvn(bp, listheadp); 482df8bae1dSRodney W. Grimes } 483df8bae1dSRodney W. Grimes 484df8bae1dSRodney W. Grimes /* 485df8bae1dSRodney W. Grimes * Create a vnode for a block device. 486df8bae1dSRodney W. Grimes * Used for root filesystem, argdev, and swap areas. 487df8bae1dSRodney W. Grimes * Also used for memory file system special devices. 488df8bae1dSRodney W. Grimes */ 489df8bae1dSRodney W. Grimes bdevvp(dev, vpp) 490df8bae1dSRodney W. Grimes dev_t dev; 491df8bae1dSRodney W. Grimes struct vnode **vpp; 492df8bae1dSRodney W. Grimes { 493df8bae1dSRodney W. Grimes register struct vnode *vp; 494df8bae1dSRodney W. Grimes struct vnode *nvp; 495df8bae1dSRodney W. Grimes int error; 496df8bae1dSRodney W. Grimes 497df8bae1dSRodney W. Grimes if (dev == NODEV) 498df8bae1dSRodney W. Grimes return (0); 499df8bae1dSRodney W. Grimes error = getnewvnode(VT_NON, (struct mount *)0, spec_vnodeop_p, &nvp); 500df8bae1dSRodney W. Grimes if (error) { 501df8bae1dSRodney W. Grimes *vpp = 0; 502df8bae1dSRodney W. Grimes return (error); 503df8bae1dSRodney W. Grimes } 504df8bae1dSRodney W. Grimes vp = nvp; 505df8bae1dSRodney W. Grimes vp->v_type = VBLK; 506df8bae1dSRodney W. Grimes if (nvp = checkalias(vp, dev, (struct mount *)0)) { 507df8bae1dSRodney W. Grimes vput(vp); 508df8bae1dSRodney W. Grimes vp = nvp; 509df8bae1dSRodney W. Grimes } 510df8bae1dSRodney W. Grimes *vpp = vp; 511df8bae1dSRodney W. Grimes return (0); 512df8bae1dSRodney W. Grimes } 513df8bae1dSRodney W. Grimes 514df8bae1dSRodney W. Grimes /* 515df8bae1dSRodney W. Grimes * Check to see if the new vnode represents a special device 516df8bae1dSRodney W. Grimes * for which we already have a vnode (either because of 517df8bae1dSRodney W. Grimes * bdevvp() or because of a different vnode representing 518df8bae1dSRodney W. Grimes * the same block device). If such an alias exists, deallocate 519df8bae1dSRodney W. Grimes * the existing contents and return the aliased vnode. The 520df8bae1dSRodney W. Grimes * caller is responsible for filling it with its new contents. 521df8bae1dSRodney W. Grimes */ 522df8bae1dSRodney W. Grimes struct vnode * 523df8bae1dSRodney W. Grimes checkalias(nvp, nvp_rdev, mp) 524df8bae1dSRodney W. Grimes register struct vnode *nvp; 525df8bae1dSRodney W. Grimes dev_t nvp_rdev; 526df8bae1dSRodney W. Grimes struct mount *mp; 527df8bae1dSRodney W. Grimes { 528df8bae1dSRodney W. Grimes register struct vnode *vp; 529df8bae1dSRodney W. Grimes struct vnode **vpp; 530df8bae1dSRodney W. Grimes 531df8bae1dSRodney W. Grimes if (nvp->v_type != VBLK && nvp->v_type != VCHR) 532df8bae1dSRodney W. Grimes return (NULLVP); 533df8bae1dSRodney W. Grimes 534df8bae1dSRodney W. Grimes vpp = &speclisth[SPECHASH(nvp_rdev)]; 535df8bae1dSRodney W. Grimes loop: 536df8bae1dSRodney W. Grimes for (vp = *vpp; vp; vp = vp->v_specnext) { 537df8bae1dSRodney W. Grimes if (nvp_rdev != vp->v_rdev || nvp->v_type != vp->v_type) 538df8bae1dSRodney W. Grimes continue; 539df8bae1dSRodney W. Grimes /* 540df8bae1dSRodney W. Grimes * Alias, but not in use, so flush it out. 541df8bae1dSRodney W. Grimes */ 542df8bae1dSRodney W. Grimes if (vp->v_usecount == 0) { 543df8bae1dSRodney W. Grimes vgone(vp); 544df8bae1dSRodney W. Grimes goto loop; 545df8bae1dSRodney W. Grimes } 546df8bae1dSRodney W. Grimes if (vget(vp, 1)) 547df8bae1dSRodney W. Grimes goto loop; 548df8bae1dSRodney W. Grimes break; 549df8bae1dSRodney W. Grimes } 550df8bae1dSRodney W. Grimes if (vp == NULL || vp->v_tag != VT_NON) { 551df8bae1dSRodney W. Grimes MALLOC(nvp->v_specinfo, struct specinfo *, 552df8bae1dSRodney W. Grimes sizeof(struct specinfo), M_VNODE, M_WAITOK); 553df8bae1dSRodney W. Grimes nvp->v_rdev = nvp_rdev; 554df8bae1dSRodney W. Grimes nvp->v_hashchain = vpp; 555df8bae1dSRodney W. Grimes nvp->v_specnext = *vpp; 556df8bae1dSRodney W. Grimes nvp->v_specflags = 0; 557df8bae1dSRodney W. Grimes *vpp = nvp; 558df8bae1dSRodney W. Grimes if (vp != NULL) { 559df8bae1dSRodney W. Grimes nvp->v_flag |= VALIASED; 560df8bae1dSRodney W. Grimes vp->v_flag |= VALIASED; 561df8bae1dSRodney W. Grimes vput(vp); 562df8bae1dSRodney W. Grimes } 563df8bae1dSRodney W. Grimes return (NULLVP); 564df8bae1dSRodney W. Grimes } 565df8bae1dSRodney W. Grimes VOP_UNLOCK(vp); 566df8bae1dSRodney W. Grimes vclean(vp, 0); 567df8bae1dSRodney W. Grimes vp->v_op = nvp->v_op; 568df8bae1dSRodney W. Grimes vp->v_tag = nvp->v_tag; 569df8bae1dSRodney W. Grimes nvp->v_type = VNON; 570df8bae1dSRodney W. Grimes insmntque(vp, mp); 571df8bae1dSRodney W. Grimes return (vp); 572df8bae1dSRodney W. Grimes } 573df8bae1dSRodney W. Grimes 574df8bae1dSRodney W. Grimes /* 575df8bae1dSRodney W. Grimes * Grab a particular vnode from the free list, increment its 576df8bae1dSRodney W. Grimes * reference count and lock it. The vnode lock bit is set the 577df8bae1dSRodney W. Grimes * vnode is being eliminated in vgone. The process is awakened 578df8bae1dSRodney W. Grimes * when the transition is completed, and an error returned to 579df8bae1dSRodney W. Grimes * indicate that the vnode is no longer usable (possibly having 580df8bae1dSRodney W. Grimes * been changed to a new file system type). 581df8bae1dSRodney W. Grimes */ 582df8bae1dSRodney W. Grimes vget(vp, lockflag) 583df8bae1dSRodney W. Grimes register struct vnode *vp; 584df8bae1dSRodney W. Grimes int lockflag; 585df8bae1dSRodney W. Grimes { 586df8bae1dSRodney W. Grimes 587df8bae1dSRodney W. Grimes /* 588df8bae1dSRodney W. Grimes * If the vnode is in the process of being cleaned out for 589df8bae1dSRodney W. Grimes * another use, we wait for the cleaning to finish and then 590df8bae1dSRodney W. Grimes * return failure. Cleaning is determined either by checking 591df8bae1dSRodney W. Grimes * that the VXLOCK flag is set, or that the use count is 592df8bae1dSRodney W. Grimes * zero with the back pointer set to show that it has been 593df8bae1dSRodney W. Grimes * removed from the free list by getnewvnode. The VXLOCK 594df8bae1dSRodney W. Grimes * flag may not have been set yet because vclean is blocked in 595df8bae1dSRodney W. Grimes * the VOP_LOCK call waiting for the VOP_INACTIVE to complete. 596df8bae1dSRodney W. Grimes */ 597df8bae1dSRodney W. Grimes if ((vp->v_flag & VXLOCK) || 598df8bae1dSRodney W. Grimes (vp->v_usecount == 0 && 599df8bae1dSRodney W. Grimes vp->v_freelist.tqe_prev == (struct vnode **)0xdeadb)) { 600df8bae1dSRodney W. Grimes vp->v_flag |= VXWANT; 601df8bae1dSRodney W. Grimes sleep((caddr_t)vp, PINOD); 602df8bae1dSRodney W. Grimes return (1); 603df8bae1dSRodney W. Grimes } 604df8bae1dSRodney W. Grimes if (vp->v_usecount == 0) 605df8bae1dSRodney W. Grimes TAILQ_REMOVE(&vnode_free_list, vp, v_freelist); 606df8bae1dSRodney W. Grimes vp->v_usecount++; 607df8bae1dSRodney W. Grimes if (lockflag) 608df8bae1dSRodney W. Grimes VOP_LOCK(vp); 609df8bae1dSRodney W. Grimes return (0); 610df8bae1dSRodney W. Grimes } 611df8bae1dSRodney W. Grimes 612df8bae1dSRodney W. Grimes /* 613df8bae1dSRodney W. Grimes * Vnode reference, just increment the count 614df8bae1dSRodney W. Grimes */ 615df8bae1dSRodney W. Grimes void vref(vp) 616df8bae1dSRodney W. Grimes struct vnode *vp; 617df8bae1dSRodney W. Grimes { 618df8bae1dSRodney W. Grimes 619df8bae1dSRodney W. Grimes if (vp->v_usecount <= 0) 620df8bae1dSRodney W. Grimes panic("vref used where vget required"); 621df8bae1dSRodney W. Grimes vp->v_usecount++; 622df8bae1dSRodney W. Grimes } 623df8bae1dSRodney W. Grimes 624df8bae1dSRodney W. Grimes /* 625df8bae1dSRodney W. Grimes * vput(), just unlock and vrele() 626df8bae1dSRodney W. Grimes */ 627df8bae1dSRodney W. Grimes void vput(vp) 628df8bae1dSRodney W. Grimes register struct vnode *vp; 629df8bae1dSRodney W. Grimes { 630df8bae1dSRodney W. Grimes 631df8bae1dSRodney W. Grimes VOP_UNLOCK(vp); 632df8bae1dSRodney W. Grimes vrele(vp); 633df8bae1dSRodney W. Grimes } 634df8bae1dSRodney W. Grimes 635df8bae1dSRodney W. Grimes /* 636df8bae1dSRodney W. Grimes * Vnode release. 637df8bae1dSRodney W. Grimes * If count drops to zero, call inactive routine and return to freelist. 638df8bae1dSRodney W. Grimes */ 639df8bae1dSRodney W. Grimes void vrele(vp) 640df8bae1dSRodney W. Grimes register struct vnode *vp; 641df8bae1dSRodney W. Grimes { 642df8bae1dSRodney W. Grimes 643df8bae1dSRodney W. Grimes #ifdef DIAGNOSTIC 644df8bae1dSRodney W. Grimes if (vp == NULL) 645df8bae1dSRodney W. Grimes panic("vrele: null vp"); 646df8bae1dSRodney W. Grimes #endif 647df8bae1dSRodney W. Grimes vp->v_usecount--; 648df8bae1dSRodney W. Grimes if (vp->v_usecount > 0) 649df8bae1dSRodney W. Grimes return; 650df8bae1dSRodney W. Grimes #ifdef DIAGNOSTIC 651df8bae1dSRodney W. Grimes if (vp->v_usecount != 0 || vp->v_writecount != 0) { 652df8bae1dSRodney W. Grimes vprint("vrele: bad ref count", vp); 653df8bae1dSRodney W. Grimes panic("vrele: ref cnt"); 654df8bae1dSRodney W. Grimes } 655df8bae1dSRodney W. Grimes #endif 656df8bae1dSRodney W. Grimes /* 657df8bae1dSRodney W. Grimes * insert at tail of LRU list 658df8bae1dSRodney W. Grimes */ 659df8bae1dSRodney W. Grimes TAILQ_INSERT_TAIL(&vnode_free_list, vp, v_freelist); 660df8bae1dSRodney W. Grimes VOP_INACTIVE(vp); 661df8bae1dSRodney W. Grimes } 662df8bae1dSRodney W. Grimes 663df8bae1dSRodney W. Grimes /* 664df8bae1dSRodney W. Grimes * Page or buffer structure gets a reference. 665df8bae1dSRodney W. Grimes */ 666df8bae1dSRodney W. Grimes void vhold(vp) 667df8bae1dSRodney W. Grimes register struct vnode *vp; 668df8bae1dSRodney W. Grimes { 669df8bae1dSRodney W. Grimes 670df8bae1dSRodney W. Grimes vp->v_holdcnt++; 671df8bae1dSRodney W. Grimes } 672df8bae1dSRodney W. Grimes 673df8bae1dSRodney W. Grimes /* 674df8bae1dSRodney W. Grimes * Page or buffer structure frees a reference. 675df8bae1dSRodney W. Grimes */ 676df8bae1dSRodney W. Grimes void holdrele(vp) 677df8bae1dSRodney W. Grimes register struct vnode *vp; 678df8bae1dSRodney W. Grimes { 679df8bae1dSRodney W. Grimes 680df8bae1dSRodney W. Grimes if (vp->v_holdcnt <= 0) 681df8bae1dSRodney W. Grimes panic("holdrele: holdcnt"); 682df8bae1dSRodney W. Grimes vp->v_holdcnt--; 683df8bae1dSRodney W. Grimes } 684df8bae1dSRodney W. Grimes 685df8bae1dSRodney W. Grimes /* 686df8bae1dSRodney W. Grimes * Remove any vnodes in the vnode table belonging to mount point mp. 687df8bae1dSRodney W. Grimes * 688df8bae1dSRodney W. Grimes * If MNT_NOFORCE is specified, there should not be any active ones, 689df8bae1dSRodney W. Grimes * return error if any are found (nb: this is a user error, not a 690df8bae1dSRodney W. Grimes * system error). If MNT_FORCE is specified, detach any active vnodes 691df8bae1dSRodney W. Grimes * that are found. 692df8bae1dSRodney W. Grimes */ 693df8bae1dSRodney W. Grimes #ifdef DIAGNOSTIC 694df8bae1dSRodney W. Grimes int busyprt = 0; /* print out busy vnodes */ 695df8bae1dSRodney W. Grimes struct ctldebug debug1 = { "busyprt", &busyprt }; 696df8bae1dSRodney W. Grimes #endif 697df8bae1dSRodney W. Grimes 698df8bae1dSRodney W. Grimes vflush(mp, skipvp, flags) 699df8bae1dSRodney W. Grimes struct mount *mp; 700df8bae1dSRodney W. Grimes struct vnode *skipvp; 701df8bae1dSRodney W. Grimes int flags; 702df8bae1dSRodney W. Grimes { 703df8bae1dSRodney W. Grimes register struct vnode *vp, *nvp; 704df8bae1dSRodney W. Grimes int busy = 0; 705df8bae1dSRodney W. Grimes 706df8bae1dSRodney W. Grimes if ((mp->mnt_flag & MNT_MPBUSY) == 0) 707df8bae1dSRodney W. Grimes panic("vflush: not busy"); 708df8bae1dSRodney W. Grimes loop: 709df8bae1dSRodney W. Grimes for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 710df8bae1dSRodney W. Grimes if (vp->v_mount != mp) 711df8bae1dSRodney W. Grimes goto loop; 712df8bae1dSRodney W. Grimes nvp = vp->v_mntvnodes.le_next; 713df8bae1dSRodney W. Grimes /* 714df8bae1dSRodney W. Grimes * Skip over a selected vnode. 715df8bae1dSRodney W. Grimes */ 716df8bae1dSRodney W. Grimes if (vp == skipvp) 717df8bae1dSRodney W. Grimes continue; 718df8bae1dSRodney W. Grimes /* 719df8bae1dSRodney W. Grimes * Skip over a vnodes marked VSYSTEM. 720df8bae1dSRodney W. Grimes */ 721df8bae1dSRodney W. Grimes if ((flags & SKIPSYSTEM) && (vp->v_flag & VSYSTEM)) 722df8bae1dSRodney W. Grimes continue; 723df8bae1dSRodney W. Grimes /* 724df8bae1dSRodney W. Grimes * If WRITECLOSE is set, only flush out regular file 725df8bae1dSRodney W. Grimes * vnodes open for writing. 726df8bae1dSRodney W. Grimes */ 727df8bae1dSRodney W. Grimes if ((flags & WRITECLOSE) && 728df8bae1dSRodney W. Grimes (vp->v_writecount == 0 || vp->v_type != VREG)) 729df8bae1dSRodney W. Grimes continue; 730df8bae1dSRodney W. Grimes /* 731df8bae1dSRodney W. Grimes * With v_usecount == 0, all we need to do is clear 732df8bae1dSRodney W. Grimes * out the vnode data structures and we are done. 733df8bae1dSRodney W. Grimes */ 734df8bae1dSRodney W. Grimes if (vp->v_usecount == 0) { 735df8bae1dSRodney W. Grimes vgone(vp); 736df8bae1dSRodney W. Grimes continue; 737df8bae1dSRodney W. Grimes } 738df8bae1dSRodney W. Grimes /* 739df8bae1dSRodney W. Grimes * If FORCECLOSE is set, forcibly close the vnode. 740df8bae1dSRodney W. Grimes * For block or character devices, revert to an 741df8bae1dSRodney W. Grimes * anonymous device. For all other files, just kill them. 742df8bae1dSRodney W. Grimes */ 743df8bae1dSRodney W. Grimes if (flags & FORCECLOSE) { 744df8bae1dSRodney W. Grimes if (vp->v_type != VBLK && vp->v_type != VCHR) { 745df8bae1dSRodney W. Grimes vgone(vp); 746df8bae1dSRodney W. Grimes } else { 747df8bae1dSRodney W. Grimes vclean(vp, 0); 748df8bae1dSRodney W. Grimes vp->v_op = spec_vnodeop_p; 749df8bae1dSRodney W. Grimes insmntque(vp, (struct mount *)0); 750df8bae1dSRodney W. Grimes } 751df8bae1dSRodney W. Grimes continue; 752df8bae1dSRodney W. Grimes } 753df8bae1dSRodney W. Grimes #ifdef DIAGNOSTIC 754df8bae1dSRodney W. Grimes if (busyprt) 755df8bae1dSRodney W. Grimes vprint("vflush: busy vnode", vp); 756df8bae1dSRodney W. Grimes #endif 757df8bae1dSRodney W. Grimes busy++; 758df8bae1dSRodney W. Grimes } 759df8bae1dSRodney W. Grimes if (busy) 760df8bae1dSRodney W. Grimes return (EBUSY); 761df8bae1dSRodney W. Grimes return (0); 762df8bae1dSRodney W. Grimes } 763df8bae1dSRodney W. Grimes 764df8bae1dSRodney W. Grimes /* 765df8bae1dSRodney W. Grimes * Disassociate the underlying file system from a vnode. 766df8bae1dSRodney W. Grimes */ 767df8bae1dSRodney W. Grimes void 768df8bae1dSRodney W. Grimes vclean(vp, flags) 769df8bae1dSRodney W. Grimes register struct vnode *vp; 770df8bae1dSRodney W. Grimes int flags; 771df8bae1dSRodney W. Grimes { 772df8bae1dSRodney W. Grimes int active; 773df8bae1dSRodney W. Grimes 774df8bae1dSRodney W. Grimes /* 775df8bae1dSRodney W. Grimes * Check to see if the vnode is in use. 776df8bae1dSRodney W. Grimes * If so we have to reference it before we clean it out 777df8bae1dSRodney W. Grimes * so that its count cannot fall to zero and generate a 778df8bae1dSRodney W. Grimes * race against ourselves to recycle it. 779df8bae1dSRodney W. Grimes */ 780df8bae1dSRodney W. Grimes if (active = vp->v_usecount) 781df8bae1dSRodney W. Grimes VREF(vp); 782df8bae1dSRodney W. Grimes /* 783df8bae1dSRodney W. Grimes * Even if the count is zero, the VOP_INACTIVE routine may still 784df8bae1dSRodney W. Grimes * have the object locked while it cleans it out. The VOP_LOCK 785df8bae1dSRodney W. Grimes * ensures that the VOP_INACTIVE routine is done with its work. 786df8bae1dSRodney W. Grimes * For active vnodes, it ensures that no other activity can 787df8bae1dSRodney W. Grimes * occur while the underlying object is being cleaned out. 788df8bae1dSRodney W. Grimes */ 789df8bae1dSRodney W. Grimes VOP_LOCK(vp); 790df8bae1dSRodney W. Grimes /* 791df8bae1dSRodney W. Grimes * Prevent the vnode from being recycled or 792df8bae1dSRodney W. Grimes * brought into use while we clean it out. 793df8bae1dSRodney W. Grimes */ 794df8bae1dSRodney W. Grimes if (vp->v_flag & VXLOCK) 795df8bae1dSRodney W. Grimes panic("vclean: deadlock"); 796df8bae1dSRodney W. Grimes vp->v_flag |= VXLOCK; 797df8bae1dSRodney W. Grimes /* 798df8bae1dSRodney W. Grimes * Clean out any buffers associated with the vnode. 799df8bae1dSRodney W. Grimes */ 800df8bae1dSRodney W. Grimes if (flags & DOCLOSE) 801df8bae1dSRodney W. Grimes vinvalbuf(vp, V_SAVE, NOCRED, NULL, 0, 0); 802df8bae1dSRodney W. Grimes /* 803df8bae1dSRodney W. Grimes * Any other processes trying to obtain this lock must first 804df8bae1dSRodney W. Grimes * wait for VXLOCK to clear, then call the new lock operation. 805df8bae1dSRodney W. Grimes */ 806df8bae1dSRodney W. Grimes VOP_UNLOCK(vp); 807df8bae1dSRodney W. Grimes /* 808df8bae1dSRodney W. Grimes * If purging an active vnode, it must be closed and 809df8bae1dSRodney W. Grimes * deactivated before being reclaimed. 810df8bae1dSRodney W. Grimes */ 811df8bae1dSRodney W. Grimes if (active) { 812df8bae1dSRodney W. Grimes if (flags & DOCLOSE) 813df8bae1dSRodney W. Grimes VOP_CLOSE(vp, IO_NDELAY, NOCRED, NULL); 814df8bae1dSRodney W. Grimes VOP_INACTIVE(vp); 815df8bae1dSRodney W. Grimes } 816df8bae1dSRodney W. Grimes /* 817df8bae1dSRodney W. Grimes * Reclaim the vnode. 818df8bae1dSRodney W. Grimes */ 819df8bae1dSRodney W. Grimes if (VOP_RECLAIM(vp)) 820df8bae1dSRodney W. Grimes panic("vclean: cannot reclaim"); 821df8bae1dSRodney W. Grimes if (active) 822df8bae1dSRodney W. Grimes vrele(vp); 823df8bae1dSRodney W. Grimes 824df8bae1dSRodney W. Grimes /* 825df8bae1dSRodney W. Grimes * Done with purge, notify sleepers of the grim news. 826df8bae1dSRodney W. Grimes */ 827df8bae1dSRodney W. Grimes vp->v_op = dead_vnodeop_p; 828df8bae1dSRodney W. Grimes vp->v_tag = VT_NON; 829df8bae1dSRodney W. Grimes vp->v_flag &= ~VXLOCK; 830df8bae1dSRodney W. Grimes if (vp->v_flag & VXWANT) { 831df8bae1dSRodney W. Grimes vp->v_flag &= ~VXWANT; 832df8bae1dSRodney W. Grimes wakeup((caddr_t)vp); 833df8bae1dSRodney W. Grimes } 834df8bae1dSRodney W. Grimes } 835df8bae1dSRodney W. Grimes 836df8bae1dSRodney W. Grimes /* 837df8bae1dSRodney W. Grimes * Eliminate all activity associated with the requested vnode 838df8bae1dSRodney W. Grimes * and with all vnodes aliased to the requested vnode. 839df8bae1dSRodney W. Grimes */ 840df8bae1dSRodney W. Grimes void vgoneall(vp) 841df8bae1dSRodney W. Grimes register struct vnode *vp; 842df8bae1dSRodney W. Grimes { 843df8bae1dSRodney W. Grimes register struct vnode *vq; 844df8bae1dSRodney W. Grimes 845df8bae1dSRodney W. Grimes if (vp->v_flag & VALIASED) { 846df8bae1dSRodney W. Grimes /* 847df8bae1dSRodney W. Grimes * If a vgone (or vclean) is already in progress, 848df8bae1dSRodney W. Grimes * wait until it is done and return. 849df8bae1dSRodney W. Grimes */ 850df8bae1dSRodney W. Grimes if (vp->v_flag & VXLOCK) { 851df8bae1dSRodney W. Grimes vp->v_flag |= VXWANT; 852df8bae1dSRodney W. Grimes sleep((caddr_t)vp, PINOD); 853df8bae1dSRodney W. Grimes return; 854df8bae1dSRodney W. Grimes } 855df8bae1dSRodney W. Grimes /* 856df8bae1dSRodney W. Grimes * Ensure that vp will not be vgone'd while we 857df8bae1dSRodney W. Grimes * are eliminating its aliases. 858df8bae1dSRodney W. Grimes */ 859df8bae1dSRodney W. Grimes vp->v_flag |= VXLOCK; 860df8bae1dSRodney W. Grimes while (vp->v_flag & VALIASED) { 861df8bae1dSRodney W. Grimes for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { 862df8bae1dSRodney W. Grimes if (vq->v_rdev != vp->v_rdev || 863df8bae1dSRodney W. Grimes vq->v_type != vp->v_type || vp == vq) 864df8bae1dSRodney W. Grimes continue; 865df8bae1dSRodney W. Grimes vgone(vq); 866df8bae1dSRodney W. Grimes break; 867df8bae1dSRodney W. Grimes } 868df8bae1dSRodney W. Grimes } 869df8bae1dSRodney W. Grimes /* 870df8bae1dSRodney W. Grimes * Remove the lock so that vgone below will 871df8bae1dSRodney W. Grimes * really eliminate the vnode after which time 872df8bae1dSRodney W. Grimes * vgone will awaken any sleepers. 873df8bae1dSRodney W. Grimes */ 874df8bae1dSRodney W. Grimes vp->v_flag &= ~VXLOCK; 875df8bae1dSRodney W. Grimes } 876df8bae1dSRodney W. Grimes vgone(vp); 877df8bae1dSRodney W. Grimes } 878df8bae1dSRodney W. Grimes 879df8bae1dSRodney W. Grimes /* 880df8bae1dSRodney W. Grimes * Eliminate all activity associated with a vnode 881df8bae1dSRodney W. Grimes * in preparation for reuse. 882df8bae1dSRodney W. Grimes */ 883df8bae1dSRodney W. Grimes void vgone(vp) 884df8bae1dSRodney W. Grimes register struct vnode *vp; 885df8bae1dSRodney W. Grimes { 886df8bae1dSRodney W. Grimes register struct vnode *vq; 887df8bae1dSRodney W. Grimes struct vnode *vx; 888df8bae1dSRodney W. Grimes 889df8bae1dSRodney W. Grimes /* 890df8bae1dSRodney W. Grimes * If a vgone (or vclean) is already in progress, 891df8bae1dSRodney W. Grimes * wait until it is done and return. 892df8bae1dSRodney W. Grimes */ 893df8bae1dSRodney W. Grimes if (vp->v_flag & VXLOCK) { 894df8bae1dSRodney W. Grimes vp->v_flag |= VXWANT; 895df8bae1dSRodney W. Grimes sleep((caddr_t)vp, PINOD); 896df8bae1dSRodney W. Grimes return; 897df8bae1dSRodney W. Grimes } 898df8bae1dSRodney W. Grimes /* 899df8bae1dSRodney W. Grimes * Clean out the filesystem specific data. 900df8bae1dSRodney W. Grimes */ 901df8bae1dSRodney W. Grimes vclean(vp, DOCLOSE); 902df8bae1dSRodney W. Grimes /* 903df8bae1dSRodney W. Grimes * Delete from old mount point vnode list, if on one. 904df8bae1dSRodney W. Grimes */ 905df8bae1dSRodney W. Grimes if (vp->v_mount != NULL) { 906df8bae1dSRodney W. Grimes LIST_REMOVE(vp, v_mntvnodes); 907df8bae1dSRodney W. Grimes vp->v_mount = NULL; 908df8bae1dSRodney W. Grimes } 909df8bae1dSRodney W. Grimes /* 910df8bae1dSRodney W. Grimes * If special device, remove it from special device alias list. 911df8bae1dSRodney W. Grimes */ 912df8bae1dSRodney W. Grimes if (vp->v_type == VBLK || vp->v_type == VCHR) { 913df8bae1dSRodney W. Grimes if (*vp->v_hashchain == vp) { 914df8bae1dSRodney W. Grimes *vp->v_hashchain = vp->v_specnext; 915df8bae1dSRodney W. Grimes } else { 916df8bae1dSRodney W. Grimes for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { 917df8bae1dSRodney W. Grimes if (vq->v_specnext != vp) 918df8bae1dSRodney W. Grimes continue; 919df8bae1dSRodney W. Grimes vq->v_specnext = vp->v_specnext; 920df8bae1dSRodney W. Grimes break; 921df8bae1dSRodney W. Grimes } 922df8bae1dSRodney W. Grimes if (vq == NULL) 923df8bae1dSRodney W. Grimes panic("missing bdev"); 924df8bae1dSRodney W. Grimes } 925df8bae1dSRodney W. Grimes if (vp->v_flag & VALIASED) { 926df8bae1dSRodney W. Grimes vx = NULL; 927df8bae1dSRodney W. Grimes for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { 928df8bae1dSRodney W. Grimes if (vq->v_rdev != vp->v_rdev || 929df8bae1dSRodney W. Grimes vq->v_type != vp->v_type) 930df8bae1dSRodney W. Grimes continue; 931df8bae1dSRodney W. Grimes if (vx) 932df8bae1dSRodney W. Grimes break; 933df8bae1dSRodney W. Grimes vx = vq; 934df8bae1dSRodney W. Grimes } 935df8bae1dSRodney W. Grimes if (vx == NULL) 936df8bae1dSRodney W. Grimes panic("missing alias"); 937df8bae1dSRodney W. Grimes if (vq == NULL) 938df8bae1dSRodney W. Grimes vx->v_flag &= ~VALIASED; 939df8bae1dSRodney W. Grimes vp->v_flag &= ~VALIASED; 940df8bae1dSRodney W. Grimes } 941df8bae1dSRodney W. Grimes FREE(vp->v_specinfo, M_VNODE); 942df8bae1dSRodney W. Grimes vp->v_specinfo = NULL; 943df8bae1dSRodney W. Grimes } 944df8bae1dSRodney W. Grimes /* 945df8bae1dSRodney W. Grimes * If it is on the freelist and not already at the head, 946df8bae1dSRodney W. Grimes * move it to the head of the list. The test of the back 947df8bae1dSRodney W. Grimes * pointer and the reference count of zero is because 948df8bae1dSRodney W. Grimes * it will be removed from the free list by getnewvnode, 949df8bae1dSRodney W. Grimes * but will not have its reference count incremented until 950df8bae1dSRodney W. Grimes * after calling vgone. If the reference count were 951df8bae1dSRodney W. Grimes * incremented first, vgone would (incorrectly) try to 952df8bae1dSRodney W. Grimes * close the previous instance of the underlying object. 953df8bae1dSRodney W. Grimes * So, the back pointer is explicitly set to `0xdeadb' in 954df8bae1dSRodney W. Grimes * getnewvnode after removing it from the freelist to ensure 955df8bae1dSRodney W. Grimes * that we do not try to move it here. 956df8bae1dSRodney W. Grimes */ 957df8bae1dSRodney W. Grimes if (vp->v_usecount == 0 && 958df8bae1dSRodney W. Grimes vp->v_freelist.tqe_prev != (struct vnode **)0xdeadb && 959df8bae1dSRodney W. Grimes vnode_free_list.tqh_first != vp) { 960df8bae1dSRodney W. Grimes TAILQ_REMOVE(&vnode_free_list, vp, v_freelist); 961df8bae1dSRodney W. Grimes TAILQ_INSERT_HEAD(&vnode_free_list, vp, v_freelist); 962df8bae1dSRodney W. Grimes } 963df8bae1dSRodney W. Grimes vp->v_type = VBAD; 964df8bae1dSRodney W. Grimes } 965df8bae1dSRodney W. Grimes 966df8bae1dSRodney W. Grimes /* 967df8bae1dSRodney W. Grimes * Lookup a vnode by device number. 968df8bae1dSRodney W. Grimes */ 969df8bae1dSRodney W. Grimes vfinddev(dev, type, vpp) 970df8bae1dSRodney W. Grimes dev_t dev; 971df8bae1dSRodney W. Grimes enum vtype type; 972df8bae1dSRodney W. Grimes struct vnode **vpp; 973df8bae1dSRodney W. Grimes { 974df8bae1dSRodney W. Grimes register struct vnode *vp; 975df8bae1dSRodney W. Grimes 976df8bae1dSRodney W. Grimes for (vp = speclisth[SPECHASH(dev)]; vp; vp = vp->v_specnext) { 977df8bae1dSRodney W. Grimes if (dev != vp->v_rdev || type != vp->v_type) 978df8bae1dSRodney W. Grimes continue; 979df8bae1dSRodney W. Grimes *vpp = vp; 980df8bae1dSRodney W. Grimes return (1); 981df8bae1dSRodney W. Grimes } 982df8bae1dSRodney W. Grimes return (0); 983df8bae1dSRodney W. Grimes } 984df8bae1dSRodney W. Grimes 985df8bae1dSRodney W. Grimes /* 986df8bae1dSRodney W. Grimes * Calculate the total number of references to a special device. 987df8bae1dSRodney W. Grimes */ 988df8bae1dSRodney W. Grimes vcount(vp) 989df8bae1dSRodney W. Grimes register struct vnode *vp; 990df8bae1dSRodney W. Grimes { 991df8bae1dSRodney W. Grimes register struct vnode *vq, *vnext; 992df8bae1dSRodney W. Grimes int count; 993df8bae1dSRodney W. Grimes 994df8bae1dSRodney W. Grimes loop: 995df8bae1dSRodney W. Grimes if ((vp->v_flag & VALIASED) == 0) 996df8bae1dSRodney W. Grimes return (vp->v_usecount); 997df8bae1dSRodney W. Grimes for (count = 0, vq = *vp->v_hashchain; vq; vq = vnext) { 998df8bae1dSRodney W. Grimes vnext = vq->v_specnext; 999df8bae1dSRodney W. Grimes if (vq->v_rdev != vp->v_rdev || vq->v_type != vp->v_type) 1000df8bae1dSRodney W. Grimes continue; 1001df8bae1dSRodney W. Grimes /* 1002df8bae1dSRodney W. Grimes * Alias, but not in use, so flush it out. 1003df8bae1dSRodney W. Grimes */ 1004df8bae1dSRodney W. Grimes if (vq->v_usecount == 0 && vq != vp) { 1005df8bae1dSRodney W. Grimes vgone(vq); 1006df8bae1dSRodney W. Grimes goto loop; 1007df8bae1dSRodney W. Grimes } 1008df8bae1dSRodney W. Grimes count += vq->v_usecount; 1009df8bae1dSRodney W. Grimes } 1010df8bae1dSRodney W. Grimes return (count); 1011df8bae1dSRodney W. Grimes } 1012df8bae1dSRodney W. Grimes 1013df8bae1dSRodney W. Grimes /* 1014df8bae1dSRodney W. Grimes * Print out a description of a vnode. 1015df8bae1dSRodney W. Grimes */ 1016df8bae1dSRodney W. Grimes static char *typename[] = 1017df8bae1dSRodney W. Grimes { "VNON", "VREG", "VDIR", "VBLK", "VCHR", "VLNK", "VSOCK", "VFIFO", "VBAD" }; 1018df8bae1dSRodney W. Grimes 1019df8bae1dSRodney W. Grimes vprint(label, vp) 1020df8bae1dSRodney W. Grimes char *label; 1021df8bae1dSRodney W. Grimes register struct vnode *vp; 1022df8bae1dSRodney W. Grimes { 1023df8bae1dSRodney W. Grimes char buf[64]; 1024df8bae1dSRodney W. Grimes 1025df8bae1dSRodney W. Grimes if (label != NULL) 1026df8bae1dSRodney W. Grimes printf("%s: ", label); 1027df8bae1dSRodney W. Grimes printf("type %s, usecount %d, writecount %d, refcount %d,", 1028df8bae1dSRodney W. Grimes typename[vp->v_type], vp->v_usecount, vp->v_writecount, 1029df8bae1dSRodney W. Grimes vp->v_holdcnt); 1030df8bae1dSRodney W. Grimes buf[0] = '\0'; 1031df8bae1dSRodney W. Grimes if (vp->v_flag & VROOT) 1032df8bae1dSRodney W. Grimes strcat(buf, "|VROOT"); 1033df8bae1dSRodney W. Grimes if (vp->v_flag & VTEXT) 1034df8bae1dSRodney W. Grimes strcat(buf, "|VTEXT"); 1035df8bae1dSRodney W. Grimes if (vp->v_flag & VSYSTEM) 1036df8bae1dSRodney W. Grimes strcat(buf, "|VSYSTEM"); 1037df8bae1dSRodney W. Grimes if (vp->v_flag & VXLOCK) 1038df8bae1dSRodney W. Grimes strcat(buf, "|VXLOCK"); 1039df8bae1dSRodney W. Grimes if (vp->v_flag & VXWANT) 1040df8bae1dSRodney W. Grimes strcat(buf, "|VXWANT"); 1041df8bae1dSRodney W. Grimes if (vp->v_flag & VBWAIT) 1042df8bae1dSRodney W. Grimes strcat(buf, "|VBWAIT"); 1043df8bae1dSRodney W. Grimes if (vp->v_flag & VALIASED) 1044df8bae1dSRodney W. Grimes strcat(buf, "|VALIASED"); 1045df8bae1dSRodney W. Grimes if (buf[0] != '\0') 1046df8bae1dSRodney W. Grimes printf(" flags (%s)", &buf[1]); 1047df8bae1dSRodney W. Grimes if (vp->v_data == NULL) { 1048df8bae1dSRodney W. Grimes printf("\n"); 1049df8bae1dSRodney W. Grimes } else { 1050df8bae1dSRodney W. Grimes printf("\n\t"); 1051df8bae1dSRodney W. Grimes VOP_PRINT(vp); 1052df8bae1dSRodney W. Grimes } 1053df8bae1dSRodney W. Grimes } 1054df8bae1dSRodney W. Grimes 1055df8bae1dSRodney W. Grimes #ifdef DEBUG 1056df8bae1dSRodney W. Grimes /* 1057df8bae1dSRodney W. Grimes * List all of the locked vnodes in the system. 1058df8bae1dSRodney W. Grimes * Called when debugging the kernel. 1059df8bae1dSRodney W. Grimes */ 1060df8bae1dSRodney W. Grimes printlockedvnodes() 1061df8bae1dSRodney W. Grimes { 1062df8bae1dSRodney W. Grimes register struct mount *mp; 1063df8bae1dSRodney W. Grimes register struct vnode *vp; 1064df8bae1dSRodney W. Grimes 1065df8bae1dSRodney W. Grimes printf("Locked vnodes\n"); 1066df8bae1dSRodney W. Grimes for (mp = mountlist.tqh_first; mp != NULL; mp = mp->mnt_list.tqe_next) { 1067df8bae1dSRodney W. Grimes for (vp = mp->mnt_vnodelist.lh_first; 1068df8bae1dSRodney W. Grimes vp != NULL; 1069df8bae1dSRodney W. Grimes vp = vp->v_mntvnodes.le_next) 1070df8bae1dSRodney W. Grimes if (VOP_ISLOCKED(vp)) 1071df8bae1dSRodney W. Grimes vprint((char *)0, vp); 1072df8bae1dSRodney W. Grimes } 1073df8bae1dSRodney W. Grimes } 1074df8bae1dSRodney W. Grimes #endif 1075df8bae1dSRodney W. Grimes 1076df8bae1dSRodney W. Grimes int kinfo_vdebug = 1; 1077df8bae1dSRodney W. Grimes int kinfo_vgetfailed; 1078df8bae1dSRodney W. Grimes #define KINFO_VNODESLOP 10 1079df8bae1dSRodney W. Grimes /* 1080df8bae1dSRodney W. Grimes * Dump vnode list (via sysctl). 1081df8bae1dSRodney W. Grimes * Copyout address of vnode followed by vnode. 1082df8bae1dSRodney W. Grimes */ 1083df8bae1dSRodney W. Grimes /* ARGSUSED */ 1084df8bae1dSRodney W. Grimes sysctl_vnode(where, sizep) 1085df8bae1dSRodney W. Grimes char *where; 1086df8bae1dSRodney W. Grimes size_t *sizep; 1087df8bae1dSRodney W. Grimes { 1088df8bae1dSRodney W. Grimes register struct mount *mp, *nmp; 1089df8bae1dSRodney W. Grimes struct vnode *vp; 1090df8bae1dSRodney W. Grimes register char *bp = where, *savebp; 1091df8bae1dSRodney W. Grimes char *ewhere; 1092df8bae1dSRodney W. Grimes int error; 1093df8bae1dSRodney W. Grimes 1094df8bae1dSRodney W. Grimes #define VPTRSZ sizeof (struct vnode *) 1095df8bae1dSRodney W. Grimes #define VNODESZ sizeof (struct vnode) 1096df8bae1dSRodney W. Grimes if (where == NULL) { 1097df8bae1dSRodney W. Grimes *sizep = (numvnodes + KINFO_VNODESLOP) * (VPTRSZ + VNODESZ); 1098df8bae1dSRodney W. Grimes return (0); 1099df8bae1dSRodney W. Grimes } 1100df8bae1dSRodney W. Grimes ewhere = where + *sizep; 1101df8bae1dSRodney W. Grimes 1102df8bae1dSRodney W. Grimes for (mp = mountlist.tqh_first; mp != NULL; mp = nmp) { 1103df8bae1dSRodney W. Grimes nmp = mp->mnt_list.tqe_next; 1104df8bae1dSRodney W. Grimes if (vfs_busy(mp)) 1105df8bae1dSRodney W. Grimes continue; 1106df8bae1dSRodney W. Grimes savebp = bp; 1107df8bae1dSRodney W. Grimes again: 1108df8bae1dSRodney W. Grimes for (vp = mp->mnt_vnodelist.lh_first; 1109df8bae1dSRodney W. Grimes vp != NULL; 1110df8bae1dSRodney W. Grimes vp = vp->v_mntvnodes.le_next) { 1111df8bae1dSRodney W. Grimes /* 1112df8bae1dSRodney W. Grimes * Check that the vp is still associated with 1113df8bae1dSRodney W. Grimes * this filesystem. RACE: could have been 1114df8bae1dSRodney W. Grimes * recycled onto the same filesystem. 1115df8bae1dSRodney W. Grimes */ 1116df8bae1dSRodney W. Grimes if (vp->v_mount != mp) { 1117df8bae1dSRodney W. Grimes if (kinfo_vdebug) 1118df8bae1dSRodney W. Grimes printf("kinfo: vp changed\n"); 1119df8bae1dSRodney W. Grimes bp = savebp; 1120df8bae1dSRodney W. Grimes goto again; 1121df8bae1dSRodney W. Grimes } 1122df8bae1dSRodney W. Grimes if (bp + VPTRSZ + VNODESZ > ewhere) { 1123df8bae1dSRodney W. Grimes *sizep = bp - where; 1124df8bae1dSRodney W. Grimes return (ENOMEM); 1125df8bae1dSRodney W. Grimes } 1126df8bae1dSRodney W. Grimes if ((error = copyout((caddr_t)&vp, bp, VPTRSZ)) || 1127df8bae1dSRodney W. Grimes (error = copyout((caddr_t)vp, bp + VPTRSZ, VNODESZ))) 1128df8bae1dSRodney W. Grimes return (error); 1129df8bae1dSRodney W. Grimes bp += VPTRSZ + VNODESZ; 1130df8bae1dSRodney W. Grimes } 1131df8bae1dSRodney W. Grimes vfs_unbusy(mp); 1132df8bae1dSRodney W. Grimes } 1133df8bae1dSRodney W. Grimes 1134df8bae1dSRodney W. Grimes *sizep = bp - where; 1135df8bae1dSRodney W. Grimes return (0); 1136df8bae1dSRodney W. Grimes } 1137df8bae1dSRodney W. Grimes 1138df8bae1dSRodney W. Grimes /* 1139df8bae1dSRodney W. Grimes * Check to see if a filesystem is mounted on a block device. 1140df8bae1dSRodney W. Grimes */ 1141df8bae1dSRodney W. Grimes int 1142df8bae1dSRodney W. Grimes vfs_mountedon(vp) 1143df8bae1dSRodney W. Grimes register struct vnode *vp; 1144df8bae1dSRodney W. Grimes { 1145df8bae1dSRodney W. Grimes register struct vnode *vq; 1146df8bae1dSRodney W. Grimes 1147df8bae1dSRodney W. Grimes if (vp->v_specflags & SI_MOUNTEDON) 1148df8bae1dSRodney W. Grimes return (EBUSY); 1149df8bae1dSRodney W. Grimes if (vp->v_flag & VALIASED) { 1150df8bae1dSRodney W. Grimes for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { 1151df8bae1dSRodney W. Grimes if (vq->v_rdev != vp->v_rdev || 1152df8bae1dSRodney W. Grimes vq->v_type != vp->v_type) 1153df8bae1dSRodney W. Grimes continue; 1154df8bae1dSRodney W. Grimes if (vq->v_specflags & SI_MOUNTEDON) 1155df8bae1dSRodney W. Grimes return (EBUSY); 1156df8bae1dSRodney W. Grimes } 1157df8bae1dSRodney W. Grimes } 1158df8bae1dSRodney W. Grimes return (0); 1159df8bae1dSRodney W. Grimes } 1160df8bae1dSRodney W. Grimes 1161df8bae1dSRodney W. Grimes /* 1162df8bae1dSRodney W. Grimes * Build hash lists of net addresses and hang them off the mount point. 1163df8bae1dSRodney W. Grimes * Called by ufs_mount() to set up the lists of export addresses. 1164df8bae1dSRodney W. Grimes */ 1165df8bae1dSRodney W. Grimes static int 1166df8bae1dSRodney W. Grimes vfs_hang_addrlist(mp, nep, argp) 1167df8bae1dSRodney W. Grimes struct mount *mp; 1168df8bae1dSRodney W. Grimes struct netexport *nep; 1169df8bae1dSRodney W. Grimes struct export_args *argp; 1170df8bae1dSRodney W. Grimes { 1171df8bae1dSRodney W. Grimes register struct netcred *np; 1172df8bae1dSRodney W. Grimes register struct radix_node_head *rnh; 1173df8bae1dSRodney W. Grimes register int i; 1174df8bae1dSRodney W. Grimes struct radix_node *rn; 1175df8bae1dSRodney W. Grimes struct sockaddr *saddr, *smask = 0; 1176df8bae1dSRodney W. Grimes struct domain *dom; 1177df8bae1dSRodney W. Grimes int error; 1178df8bae1dSRodney W. Grimes 1179df8bae1dSRodney W. Grimes if (argp->ex_addrlen == 0) { 1180df8bae1dSRodney W. Grimes if (mp->mnt_flag & MNT_DEFEXPORTED) 1181df8bae1dSRodney W. Grimes return (EPERM); 1182df8bae1dSRodney W. Grimes np = &nep->ne_defexported; 1183df8bae1dSRodney W. Grimes np->netc_exflags = argp->ex_flags; 1184df8bae1dSRodney W. Grimes np->netc_anon = argp->ex_anon; 1185df8bae1dSRodney W. Grimes np->netc_anon.cr_ref = 1; 1186df8bae1dSRodney W. Grimes mp->mnt_flag |= MNT_DEFEXPORTED; 1187df8bae1dSRodney W. Grimes return (0); 1188df8bae1dSRodney W. Grimes } 1189df8bae1dSRodney W. Grimes i = sizeof(struct netcred) + argp->ex_addrlen + argp->ex_masklen; 1190df8bae1dSRodney W. Grimes np = (struct netcred *)malloc(i, M_NETADDR, M_WAITOK); 1191df8bae1dSRodney W. Grimes bzero((caddr_t)np, i); 1192df8bae1dSRodney W. Grimes saddr = (struct sockaddr *)(np + 1); 1193df8bae1dSRodney W. Grimes if (error = copyin(argp->ex_addr, (caddr_t)saddr, argp->ex_addrlen)) 1194df8bae1dSRodney W. Grimes goto out; 1195df8bae1dSRodney W. Grimes if (saddr->sa_len > argp->ex_addrlen) 1196df8bae1dSRodney W. Grimes saddr->sa_len = argp->ex_addrlen; 1197df8bae1dSRodney W. Grimes if (argp->ex_masklen) { 1198df8bae1dSRodney W. Grimes smask = (struct sockaddr *)((caddr_t)saddr + argp->ex_addrlen); 1199df8bae1dSRodney W. Grimes error = copyin(argp->ex_addr, (caddr_t)smask, argp->ex_masklen); 1200df8bae1dSRodney W. Grimes if (error) 1201df8bae1dSRodney W. Grimes goto out; 1202df8bae1dSRodney W. Grimes if (smask->sa_len > argp->ex_masklen) 1203df8bae1dSRodney W. Grimes smask->sa_len = argp->ex_masklen; 1204df8bae1dSRodney W. Grimes } 1205df8bae1dSRodney W. Grimes i = saddr->sa_family; 1206df8bae1dSRodney W. Grimes if ((rnh = nep->ne_rtable[i]) == 0) { 1207df8bae1dSRodney W. Grimes /* 1208df8bae1dSRodney W. Grimes * Seems silly to initialize every AF when most are not 1209df8bae1dSRodney W. Grimes * used, do so on demand here 1210df8bae1dSRodney W. Grimes */ 1211df8bae1dSRodney W. Grimes for (dom = domains; dom; dom = dom->dom_next) 1212df8bae1dSRodney W. Grimes if (dom->dom_family == i && dom->dom_rtattach) { 1213df8bae1dSRodney W. Grimes dom->dom_rtattach((void **)&nep->ne_rtable[i], 1214df8bae1dSRodney W. Grimes dom->dom_rtoffset); 1215df8bae1dSRodney W. Grimes break; 1216df8bae1dSRodney W. Grimes } 1217df8bae1dSRodney W. Grimes if ((rnh = nep->ne_rtable[i]) == 0) { 1218df8bae1dSRodney W. Grimes error = ENOBUFS; 1219df8bae1dSRodney W. Grimes goto out; 1220df8bae1dSRodney W. Grimes } 1221df8bae1dSRodney W. Grimes } 1222df8bae1dSRodney W. Grimes rn = (*rnh->rnh_addaddr)((caddr_t)saddr, (caddr_t)smask, rnh, 1223df8bae1dSRodney W. Grimes np->netc_rnodes); 1224df8bae1dSRodney W. Grimes if (rn == 0 || np != (struct netcred *)rn) { /* already exists */ 1225df8bae1dSRodney W. Grimes error = EPERM; 1226df8bae1dSRodney W. Grimes goto out; 1227df8bae1dSRodney W. Grimes } 1228df8bae1dSRodney W. Grimes np->netc_exflags = argp->ex_flags; 1229df8bae1dSRodney W. Grimes np->netc_anon = argp->ex_anon; 1230df8bae1dSRodney W. Grimes np->netc_anon.cr_ref = 1; 1231df8bae1dSRodney W. Grimes return (0); 1232df8bae1dSRodney W. Grimes out: 1233df8bae1dSRodney W. Grimes free(np, M_NETADDR); 1234df8bae1dSRodney W. Grimes return (error); 1235df8bae1dSRodney W. Grimes } 1236df8bae1dSRodney W. Grimes 1237df8bae1dSRodney W. Grimes /* ARGSUSED */ 1238df8bae1dSRodney W. Grimes static int 1239df8bae1dSRodney W. Grimes vfs_free_netcred(rn, w) 1240df8bae1dSRodney W. Grimes struct radix_node *rn; 1241df8bae1dSRodney W. Grimes caddr_t w; 1242df8bae1dSRodney W. Grimes { 1243df8bae1dSRodney W. Grimes register struct radix_node_head *rnh = (struct radix_node_head *)w; 1244df8bae1dSRodney W. Grimes 1245df8bae1dSRodney W. Grimes (*rnh->rnh_deladdr)(rn->rn_key, rn->rn_mask, rnh); 1246df8bae1dSRodney W. Grimes free((caddr_t)rn, M_NETADDR); 1247df8bae1dSRodney W. Grimes return (0); 1248df8bae1dSRodney W. Grimes } 1249df8bae1dSRodney W. Grimes 1250df8bae1dSRodney W. Grimes /* 1251df8bae1dSRodney W. Grimes * Free the net address hash lists that are hanging off the mount points. 1252df8bae1dSRodney W. Grimes */ 1253df8bae1dSRodney W. Grimes static void 1254df8bae1dSRodney W. Grimes vfs_free_addrlist(nep) 1255df8bae1dSRodney W. Grimes struct netexport *nep; 1256df8bae1dSRodney W. Grimes { 1257df8bae1dSRodney W. Grimes register int i; 1258df8bae1dSRodney W. Grimes register struct radix_node_head *rnh; 1259df8bae1dSRodney W. Grimes 1260df8bae1dSRodney W. Grimes for (i = 0; i <= AF_MAX; i++) 1261df8bae1dSRodney W. Grimes if (rnh = nep->ne_rtable[i]) { 1262df8bae1dSRodney W. Grimes (*rnh->rnh_walktree)(rnh, vfs_free_netcred, 1263df8bae1dSRodney W. Grimes (caddr_t)rnh); 1264df8bae1dSRodney W. Grimes free((caddr_t)rnh, M_RTABLE); 1265df8bae1dSRodney W. Grimes nep->ne_rtable[i] = 0; 1266df8bae1dSRodney W. Grimes } 1267df8bae1dSRodney W. Grimes } 1268df8bae1dSRodney W. Grimes 1269df8bae1dSRodney W. Grimes int 1270df8bae1dSRodney W. Grimes vfs_export(mp, nep, argp) 1271df8bae1dSRodney W. Grimes struct mount *mp; 1272df8bae1dSRodney W. Grimes struct netexport *nep; 1273df8bae1dSRodney W. Grimes struct export_args *argp; 1274df8bae1dSRodney W. Grimes { 1275df8bae1dSRodney W. Grimes int error; 1276df8bae1dSRodney W. Grimes 1277df8bae1dSRodney W. Grimes if (argp->ex_flags & MNT_DELEXPORT) { 1278df8bae1dSRodney W. Grimes vfs_free_addrlist(nep); 1279df8bae1dSRodney W. Grimes mp->mnt_flag &= ~(MNT_EXPORTED | MNT_DEFEXPORTED); 1280df8bae1dSRodney W. Grimes } 1281df8bae1dSRodney W. Grimes if (argp->ex_flags & MNT_EXPORTED) { 1282df8bae1dSRodney W. Grimes if (error = vfs_hang_addrlist(mp, nep, argp)) 1283df8bae1dSRodney W. Grimes return (error); 1284df8bae1dSRodney W. Grimes mp->mnt_flag |= MNT_EXPORTED; 1285df8bae1dSRodney W. Grimes } 1286df8bae1dSRodney W. Grimes return (0); 1287df8bae1dSRodney W. Grimes } 1288df8bae1dSRodney W. Grimes 1289df8bae1dSRodney W. Grimes struct netcred * 1290df8bae1dSRodney W. Grimes vfs_export_lookup(mp, nep, nam) 1291df8bae1dSRodney W. Grimes register struct mount *mp; 1292df8bae1dSRodney W. Grimes struct netexport *nep; 1293df8bae1dSRodney W. Grimes struct mbuf *nam; 1294df8bae1dSRodney W. Grimes { 1295df8bae1dSRodney W. Grimes register struct netcred *np; 1296df8bae1dSRodney W. Grimes register struct radix_node_head *rnh; 1297df8bae1dSRodney W. Grimes struct sockaddr *saddr; 1298df8bae1dSRodney W. Grimes 1299df8bae1dSRodney W. Grimes np = NULL; 1300df8bae1dSRodney W. Grimes if (mp->mnt_flag & MNT_EXPORTED) { 1301df8bae1dSRodney W. Grimes /* 1302df8bae1dSRodney W. Grimes * Lookup in the export list first. 1303df8bae1dSRodney W. Grimes */ 1304df8bae1dSRodney W. Grimes if (nam != NULL) { 1305df8bae1dSRodney W. Grimes saddr = mtod(nam, struct sockaddr *); 1306df8bae1dSRodney W. Grimes rnh = nep->ne_rtable[saddr->sa_family]; 1307df8bae1dSRodney W. Grimes if (rnh != NULL) { 1308df8bae1dSRodney W. Grimes np = (struct netcred *) 1309df8bae1dSRodney W. Grimes (*rnh->rnh_matchaddr)((caddr_t)saddr, 1310df8bae1dSRodney W. Grimes rnh); 1311df8bae1dSRodney W. Grimes if (np && np->netc_rnodes->rn_flags & RNF_ROOT) 1312df8bae1dSRodney W. Grimes np = NULL; 1313df8bae1dSRodney W. Grimes } 1314df8bae1dSRodney W. Grimes } 1315df8bae1dSRodney W. Grimes /* 1316df8bae1dSRodney W. Grimes * If no address match, use the default if it exists. 1317df8bae1dSRodney W. Grimes */ 1318df8bae1dSRodney W. Grimes if (np == NULL && mp->mnt_flag & MNT_DEFEXPORTED) 1319df8bae1dSRodney W. Grimes np = &nep->ne_defexported; 1320df8bae1dSRodney W. Grimes } 1321df8bae1dSRodney W. Grimes return (np); 1322df8bae1dSRodney W. Grimes } 1323