nfs_vfsops.c revision 1.32.2.2
1 1.32.2.2 pk /* $NetBSD: nfs_vfsops.c,v 1.32.2.2 1994/08/23 09:31:01 pk Exp $ */ 2 1.32.2.2 pk 3 1.32.2.2 pk /* 4 1.32.2.2 pk * Copyright (c) 1989, 1993 5 1.32.2.2 pk * The Regents of the University of California. All rights reserved. 6 1.32.2.2 pk * 7 1.32.2.2 pk * This code is derived from software contributed to Berkeley by 8 1.32.2.2 pk * Rick Macklem at The University of Guelph. 9 1.32.2.2 pk * 10 1.32.2.2 pk * Redistribution and use in source and binary forms, with or without 11 1.32.2.2 pk * modification, are permitted provided that the following conditions 12 1.32.2.2 pk * are met: 13 1.32.2.2 pk * 1. Redistributions of source code must retain the above copyright 14 1.32.2.2 pk * notice, this list of conditions and the following disclaimer. 15 1.32.2.2 pk * 2. Redistributions in binary form must reproduce the above copyright 16 1.32.2.2 pk * notice, this list of conditions and the following disclaimer in the 17 1.32.2.2 pk * documentation and/or other materials provided with the distribution. 18 1.32.2.2 pk * 3. All advertising materials mentioning features or use of this software 19 1.32.2.2 pk * must display the following acknowledgement: 20 1.32.2.2 pk * This product includes software developed by the University of 21 1.32.2.2 pk * California, Berkeley and its contributors. 22 1.32.2.2 pk * 4. Neither the name of the University nor the names of its contributors 23 1.32.2.2 pk * may be used to endorse or promote products derived from this software 24 1.32.2.2 pk * without specific prior written permission. 25 1.32.2.2 pk * 26 1.32.2.2 pk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 1.32.2.2 pk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 1.32.2.2 pk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 1.32.2.2 pk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 1.32.2.2 pk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 1.32.2.2 pk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 1.32.2.2 pk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 1.32.2.2 pk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 1.32.2.2 pk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 1.32.2.2 pk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 1.32.2.2 pk * SUCH DAMAGE. 37 1.32.2.2 pk * 38 1.32.2.2 pk * @(#)nfs_vfsops.c 8.3 (Berkeley) 1/4/94 39 1.32.2.2 pk */ 40 1.32.2.2 pk 41 1.32.2.2 pk #include <sys/param.h> 42 1.32.2.2 pk #include <sys/conf.h> 43 1.32.2.2 pk #include <sys/ioctl.h> 44 1.32.2.2 pk #include <sys/signal.h> 45 1.32.2.2 pk #include <sys/proc.h> 46 1.32.2.2 pk #include <sys/namei.h> 47 1.32.2.2 pk #include <sys/vnode.h> 48 1.32.2.2 pk #include <sys/kernel.h> 49 1.32.2.2 pk #include <sys/mount.h> 50 1.32.2.2 pk #include <sys/buf.h> 51 1.32.2.2 pk #include <sys/mbuf.h> 52 1.32.2.2 pk #include <sys/socket.h> 53 1.32.2.2 pk #include <sys/systm.h> 54 1.32.2.2 pk 55 1.32.2.2 pk #include <net/if.h> 56 1.32.2.2 pk #include <net/route.h> 57 1.32.2.2 pk #include <netinet/in.h> 58 1.32.2.2 pk 59 1.32.2.2 pk #include <nfs/rpcv2.h> 60 1.32.2.2 pk #include <nfs/nfsv2.h> 61 1.32.2.2 pk #include <nfs/nfsnode.h> 62 1.32.2.2 pk #include <nfs/nfsmount.h> 63 1.32.2.2 pk #include <nfs/nfs.h> 64 1.32.2.2 pk #include <nfs/xdr_subs.h> 65 1.32.2.2 pk #include <nfs/nfsm_subs.h> 66 1.32.2.2 pk #include <nfs/nfsdiskless.h> 67 1.32.2.2 pk #include <nfs/nqnfs.h> 68 1.32.2.2 pk 69 1.32.2.2 pk /* 70 1.32.2.2 pk * nfs vfs operations. 71 1.32.2.2 pk */ 72 1.32.2.2 pk struct vfsops nfs_vfsops = { 73 1.32.2.2 pk MOUNT_NFS, 74 1.32.2.2 pk nfs_mount, 75 1.32.2.2 pk nfs_start, 76 1.32.2.2 pk nfs_unmount, 77 1.32.2.2 pk nfs_root, 78 1.32.2.2 pk nfs_quotactl, 79 1.32.2.2 pk nfs_statfs, 80 1.32.2.2 pk nfs_sync, 81 1.32.2.2 pk nfs_vget, 82 1.32.2.2 pk nfs_fhtovp, 83 1.32.2.2 pk nfs_vptofh, 84 1.32.2.2 pk nfs_init, 85 1.32.2.2 pk }; 86 1.32.2.2 pk 87 1.32.2.2 pk extern u_long nfs_procids[NFS_NPROCS]; 88 1.32.2.2 pk extern u_long nfs_prog, nfs_vers; 89 1.32.2.2 pk void nfs_disconnect __P((struct nfsmount *)); 90 1.32.2.2 pk 91 1.32.2.2 pk static struct mount * 92 1.32.2.2 pk nfs_mount_diskless __P((struct nfs_dlmount *, char *, int, struct vnode **)); 93 1.32.2.2 pk 94 1.32.2.2 pk #define TRUE 1 95 1.32.2.2 pk #define FALSE 0 96 1.32.2.2 pk 97 1.32.2.2 pk /* 98 1.32.2.2 pk * nfs statfs call 99 1.32.2.2 pk */ 100 1.32.2.2 pk int 101 1.32.2.2 pk nfs_statfs(mp, sbp, p) 102 1.32.2.2 pk struct mount *mp; 103 1.32.2.2 pk register struct statfs *sbp; 104 1.32.2.2 pk struct proc *p; 105 1.32.2.2 pk { 106 1.32.2.2 pk register struct vnode *vp; 107 1.32.2.2 pk register struct nfsv2_statfs *sfp; 108 1.32.2.2 pk register caddr_t cp; 109 1.32.2.2 pk register long t1; 110 1.32.2.2 pk caddr_t bpos, dpos, cp2; 111 1.32.2.2 pk int error = 0, isnq; 112 1.32.2.2 pk struct mbuf *mreq, *mrep, *md, *mb, *mb2; 113 1.32.2.2 pk struct nfsmount *nmp; 114 1.32.2.2 pk struct ucred *cred; 115 1.32.2.2 pk struct nfsnode *np; 116 1.32.2.2 pk 117 1.32.2.2 pk nmp = VFSTONFS(mp); 118 1.32.2.2 pk isnq = (nmp->nm_flag & NFSMNT_NQNFS); 119 1.32.2.2 pk if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 120 1.32.2.2 pk return (error); 121 1.32.2.2 pk vp = NFSTOV(np); 122 1.32.2.2 pk nfsstats.rpccnt[NFSPROC_STATFS]++; 123 1.32.2.2 pk cred = crget(); 124 1.32.2.2 pk cred->cr_ngroups = 1; 125 1.32.2.2 pk nfsm_reqhead(vp, NFSPROC_STATFS, NFSX_FH); 126 1.32.2.2 pk nfsm_fhtom(vp); 127 1.32.2.2 pk nfsm_request(vp, NFSPROC_STATFS, p, cred); 128 1.32.2.2 pk nfsm_dissect(sfp, struct nfsv2_statfs *, NFSX_STATFS(isnq)); 129 1.32.2.2 pk #ifdef COMPAT_09 130 1.32.2.2 pk sbp->f_type = 2; 131 1.32.2.2 pk #else 132 1.32.2.2 pk sbp->f_type = 0; 133 1.32.2.2 pk #endif 134 1.32.2.2 pk sbp->f_flags = nmp->nm_flag; 135 1.32.2.2 pk sbp->f_iosize = NFS_MAXDGRAMDATA; 136 1.32.2.2 pk sbp->f_bsize = fxdr_unsigned(long, sfp->sf_bsize); 137 1.32.2.2 pk sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 138 1.32.2.2 pk sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 139 1.32.2.2 pk sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 140 1.32.2.2 pk if (isnq) { 141 1.32.2.2 pk sbp->f_files = fxdr_unsigned(long, sfp->sf_files); 142 1.32.2.2 pk sbp->f_ffree = fxdr_unsigned(long, sfp->sf_ffree); 143 1.32.2.2 pk } else { 144 1.32.2.2 pk sbp->f_files = 0; 145 1.32.2.2 pk sbp->f_ffree = 0; 146 1.32.2.2 pk } 147 1.32.2.2 pk if (sbp != &mp->mnt_stat) { 148 1.32.2.2 pk bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 149 1.32.2.2 pk bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 150 1.32.2.2 pk } 151 1.32.2.2 pk strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 152 1.32.2.2 pk sbp->f_fstypename[MFSNAMELEN] = '\0'; 153 1.32.2.2 pk nfsm_reqdone; 154 1.32.2.2 pk vrele(vp); 155 1.32.2.2 pk crfree(cred); 156 1.32.2.2 pk return (error); 157 1.32.2.2 pk } 158 1.32.2.2 pk 159 1.32.2.2 pk /* 160 1.32.2.2 pk * Mount a remote root fs via. NFS. It goes like this: 161 1.32.2.2 pk * - Call nfs_boot_init() to fill in the nfs_diskless struct 162 1.32.2.2 pk * (using RARP, bootparam RPC, mountd RPC) 163 1.32.2.2 pk * - hand craft the swap nfs vnode hanging off a fake mount point 164 1.32.2.2 pk * if swdevt[0].sw_dev == NODEV 165 1.32.2.2 pk * - build the rootfs mount point and call mountnfs() to do the rest. 166 1.32.2.2 pk */ 167 1.32.2.2 pk int 168 1.32.2.2 pk nfs_mountroot() 169 1.32.2.2 pk { 170 1.32.2.2 pk struct nfs_diskless nd; 171 1.32.2.2 pk struct vattr attr; 172 1.32.2.2 pk struct mount *mp; 173 1.32.2.2 pk struct vnode *vp; 174 1.32.2.2 pk struct proc *procp; 175 1.32.2.2 pk struct ucred *cred; 176 1.32.2.2 pk long n; 177 1.32.2.2 pk int error; 178 1.32.2.2 pk 179 1.32.2.2 pk procp = curproc; /* XXX */ 180 1.32.2.2 pk 181 1.32.2.2 pk /* 182 1.32.2.2 pk * XXX time must be non-zero when we init the interface or else 183 1.32.2.2 pk * the arp code will wedge. [Fixed now in if_ether.c] 184 1.32.2.2 pk * However, the NFS attribute cache gives false "hits" when 185 1.32.2.2 pk * time.tv_sec < NFS_ATTRTIMEO(np) so keep this in for now. 186 1.32.2.2 pk */ 187 1.32.2.2 pk if (time.tv_sec < NFS_MAXATTRTIMO) 188 1.32.2.2 pk time.tv_sec = NFS_MAXATTRTIMO; 189 1.32.2.2 pk 190 1.32.2.2 pk /* 191 1.32.2.2 pk * Call nfs_boot_init() to fill in the nfs_diskless struct. 192 1.32.2.2 pk * Side effect: Finds and configures a network interface. 193 1.32.2.2 pk */ 194 1.32.2.2 pk bzero((caddr_t) &nd, sizeof(nd)); 195 1.32.2.2 pk nfs_boot_init(&nd, procp); 196 1.32.2.2 pk 197 1.32.2.2 pk /* 198 1.32.2.2 pk * Create the root mount point. 199 1.32.2.2 pk */ 200 1.32.2.2 pk mp = nfs_mount_diskless(&nd.nd_root, "/", MNT_RDONLY, &vp); 201 1.32.2.2 pk 202 1.32.2.2 pk /* 203 1.32.2.2 pk * Link it into the mount list. 204 1.32.2.2 pk */ 205 1.32.2.2 pk if (vfs_lock(mp)) 206 1.32.2.2 pk panic("nfs_mountroot: vfs_lock"); 207 1.32.2.2 pk TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); 208 1.32.2.2 pk mp->mnt_flag |= MNT_ROOTFS; 209 1.32.2.2 pk mp->mnt_vnodecovered = NULLVP; 210 1.32.2.2 pk vfs_unlock(mp); 211 1.32.2.2 pk rootvp = vp; 212 1.32.2.2 pk 213 1.32.2.2 pk 214 1.32.2.2 pk /* Get root attributes (for the time). */ 215 1.32.2.2 pk error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 216 1.32.2.2 pk if (error) panic("nfs_mountroot: getattr for root"); 217 1.32.2.2 pk n = attr.va_mtime.ts_sec; 218 1.32.2.2 pk #ifdef DEBUG 219 1.32.2.2 pk printf("root time: 0x%x\n", n); 220 1.32.2.2 pk #endif 221 1.32.2.2 pk inittodr(n); 222 1.32.2.2 pk 223 1.32.2.2 pk #ifdef notyet 224 1.32.2.2 pk /* Set up swap credentials. */ 225 1.32.2.2 pk proc0.p_ucred->cr_uid = ntohl(nd.swap_ucred.cr_uid); 226 1.32.2.2 pk proc0.p_ucred->cr_gid = ntohl(nd.swap_ucred.cr_gid); 227 1.32.2.2 pk if ((proc0.p_ucred->cr_ngroups = ntohs(nd.swap_ucred.cr_ngroups)) > 228 1.32.2.2 pk NGROUPS) 229 1.32.2.2 pk proc0.p_ucred->cr_ngroups = NGROUPS; 230 1.32.2.2 pk for (i = 0; i < proc0.p_ucred->cr_ngroups; i++) 231 1.32.2.2 pk proc0.p_ucred->cr_groups[i] = ntohl(nd.swap_ucred.cr_groups[i]); 232 1.32.2.2 pk #endif 233 1.32.2.2 pk 234 1.32.2.2 pk /* 235 1.32.2.2 pk * "Mount" the swap device. 236 1.32.2.2 pk * 237 1.32.2.2 pk * On a "dataless" configuration (swap on disk) we will have: 238 1.32.2.2 pk * (swdevt[0].sw_dev != NODEV) identifying the swap device. 239 1.32.2.2 pk */ 240 1.32.2.2 pk if (bdevvp(swapdev, &swapdev_vp)) 241 1.32.2.2 pk panic("nfs_mountroot: can't setup swap vp"); 242 1.32.2.2 pk if (swdevt[0].sw_dev != NODEV) 243 1.32.2.2 pk return (0); 244 1.32.2.2 pk 245 1.32.2.2 pk /* 246 1.32.2.2 pk * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV) 247 1.32.2.2 pk * Create a fake mount point just for the swap vnode so that the 248 1.32.2.2 pk * swap file can be on a different server from the rootfs. 249 1.32.2.2 pk */ 250 1.32.2.2 pk mp = nfs_mount_diskless(&nd.nd_swap, "/swap", 0, &vp); 251 1.32.2.2 pk 252 1.32.2.2 pk /* 253 1.32.2.2 pk * Since the swap file is not the root dir of a file system, 254 1.32.2.2 pk * hack it to a regular file. 255 1.32.2.2 pk */ 256 1.32.2.2 pk vp->v_type = VREG; 257 1.32.2.2 pk vp->v_flag = 0; 258 1.32.2.2 pk swdevt[0].sw_vp = vp; 259 1.32.2.2 pk 260 1.32.2.2 pk /* 261 1.32.2.2 pk * Find out how large the swap file is. 262 1.32.2.2 pk */ 263 1.32.2.2 pk error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp); 264 1.32.2.2 pk if (error) 265 1.32.2.2 pk panic("nfs_mountroot: getattr for swap"); 266 1.32.2.2 pk n = (long) (attr.va_size >> DEV_BSHIFT); 267 1.32.2.2 pk #ifdef DEBUG 268 1.32.2.2 pk printf("swap size: 0x%x (blocks)\n", n); 269 1.32.2.2 pk #endif 270 1.32.2.2 pk swdevt[0].sw_nblks = n; 271 1.32.2.2 pk 272 1.32.2.2 pk return (0); 273 1.32.2.2 pk } 274 1.32.2.2 pk 275 1.32.2.2 pk /* 276 1.32.2.2 pk * Internal version of mount system call for diskless setup. 277 1.32.2.2 pk */ 278 1.32.2.2 pk static struct mount * 279 1.32.2.2 pk nfs_mount_diskless(ndmntp, mntname, mntflag, vpp) 280 1.32.2.2 pk struct nfs_dlmount *ndmntp; 281 1.32.2.2 pk char *mntname; 282 1.32.2.2 pk int mntflag; 283 1.32.2.2 pk struct vnode **vpp; 284 1.32.2.2 pk { 285 1.32.2.2 pk struct nfs_args args; 286 1.32.2.2 pk struct mount *mp; 287 1.32.2.2 pk struct mbuf *m; 288 1.32.2.2 pk int error; 289 1.32.2.2 pk 290 1.32.2.2 pk /* Create the mount point. */ 291 1.32.2.2 pk mp = (struct mount *)malloc((u_long)sizeof(struct mount), 292 1.32.2.2 pk M_MOUNT, M_NOWAIT); 293 1.32.2.2 pk if (mp == NULL) 294 1.32.2.2 pk panic("nfs_mountroot: malloc mount for %s", mntname); 295 1.32.2.2 pk bzero((char *)mp, (u_long)sizeof(struct mount)); 296 1.32.2.2 pk mp->mnt_op = &nfs_vfsops; 297 1.32.2.2 pk mp->mnt_flag = mntflag; 298 1.32.2.2 pk 299 1.32.2.2 pk /* Initialize mount args. */ 300 1.32.2.2 pk bzero((caddr_t) &args, sizeof(args)); 301 1.32.2.2 pk args.addr = (struct sockaddr *)&ndmntp->ndm_saddr; 302 1.32.2.2 pk args.addrlen = args.addr->sa_len; 303 1.32.2.2 pk args.sotype = SOCK_DGRAM; 304 1.32.2.2 pk args.fh = (nfsv2fh_t *)ndmntp->ndm_fh; 305 1.32.2.2 pk args.hostname = ndmntp->ndm_host; 306 1.32.2.2 pk args.flags = NFSMNT_RESVPORT; 307 1.32.2.2 pk 308 1.32.2.2 pk #ifdef NFS_BOOT_RWSIZE 309 1.32.2.2 pk /* 310 1.32.2.2 pk * Reduce rsize,wsize for interfaces that consistently 311 1.32.2.2 pk * drop fragments of long UDP messages. (i.e. wd8003). 312 1.32.2.2 pk * You can always change these later via remount. 313 1.32.2.2 pk */ 314 1.32.2.2 pk args.flags |= NFSMNT_WSIZE | NFSMNT_RSIZE; 315 1.32.2.2 pk args.wsize = NFS_BOOT_RWSIZE; 316 1.32.2.2 pk args.rsize = NFS_BOOT_RWSIZE; 317 1.32.2.2 pk #endif 318 1.32.2.2 pk 319 1.32.2.2 pk /* Get mbuf for server sockaddr. */ 320 1.32.2.2 pk m = m_get(M_WAIT, MT_SONAME); 321 1.32.2.2 pk if (m == NULL) 322 1.32.2.2 pk panic("nfs_mountroot: mget soname for %s", mntname); 323 1.32.2.2 pk bcopy((caddr_t)args.addr, mtod(m, caddr_t), 324 1.32.2.2 pk (m->m_len = args.addr->sa_len)); 325 1.32.2.2 pk 326 1.32.2.2 pk if (error = mountnfs(&args, mp, m, mntname, args.hostname, vpp)) 327 1.32.2.2 pk panic("nfs_mountroot: mount %s failed: %d", mntname); 328 1.32.2.2 pk 329 1.32.2.2 pk return (mp); 330 1.32.2.2 pk } 331 1.32.2.2 pk 332 1.32.2.2 pk void 333 1.32.2.2 pk nfs_decode_args(nmp, argp) 334 1.32.2.2 pk struct nfsmount *nmp; 335 1.32.2.2 pk struct nfs_args *argp; 336 1.32.2.2 pk { 337 1.32.2.2 pk int s; 338 1.32.2.2 pk int adjsock; 339 1.32.2.2 pk 340 1.32.2.2 pk s = splnet(); 341 1.32.2.2 pk 342 1.32.2.2 pk /* Re-bind if rsrvd port requested and wasn't on one */ 343 1.32.2.2 pk adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) 344 1.32.2.2 pk && (argp->flags & NFSMNT_RESVPORT); 345 1.32.2.2 pk 346 1.32.2.2 pk /* Update flags atomically. Don't change the lock bits. */ 347 1.32.2.2 pk nmp->nm_flag = 348 1.32.2.2 pk (argp->flags & ~NFSMNT_INTERNAL) | (nmp->nm_flag & NFSMNT_INTERNAL); 349 1.32.2.2 pk splx(s); 350 1.32.2.2 pk 351 1.32.2.2 pk if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { 352 1.32.2.2 pk nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; 353 1.32.2.2 pk if (nmp->nm_timeo < NFS_MINTIMEO) 354 1.32.2.2 pk nmp->nm_timeo = NFS_MINTIMEO; 355 1.32.2.2 pk else if (nmp->nm_timeo > NFS_MAXTIMEO) 356 1.32.2.2 pk nmp->nm_timeo = NFS_MAXTIMEO; 357 1.32.2.2 pk } 358 1.32.2.2 pk 359 1.32.2.2 pk if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { 360 1.32.2.2 pk nmp->nm_retry = argp->retrans; 361 1.32.2.2 pk if (nmp->nm_retry > NFS_MAXREXMIT) 362 1.32.2.2 pk nmp->nm_retry = NFS_MAXREXMIT; 363 1.32.2.2 pk } 364 1.32.2.2 pk 365 1.32.2.2 pk if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { 366 1.32.2.2 pk int osize = nmp->nm_wsize; 367 1.32.2.2 pk nmp->nm_wsize = argp->wsize; 368 1.32.2.2 pk /* Round down to multiple of blocksize */ 369 1.32.2.2 pk nmp->nm_wsize &= ~0x1ff; 370 1.32.2.2 pk if (nmp->nm_wsize <= 0) 371 1.32.2.2 pk nmp->nm_wsize = 512; 372 1.32.2.2 pk else if (nmp->nm_wsize > NFS_MAXDATA) 373 1.32.2.2 pk nmp->nm_wsize = NFS_MAXDATA; 374 1.32.2.2 pk adjsock |= (nmp->nm_wsize != osize); 375 1.32.2.2 pk } 376 1.32.2.2 pk if (nmp->nm_wsize > MAXBSIZE) 377 1.32.2.2 pk nmp->nm_wsize = MAXBSIZE; 378 1.32.2.2 pk 379 1.32.2.2 pk if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { 380 1.32.2.2 pk int osize = nmp->nm_rsize; 381 1.32.2.2 pk nmp->nm_rsize = argp->rsize; 382 1.32.2.2 pk /* Round down to multiple of blocksize */ 383 1.32.2.2 pk nmp->nm_rsize &= ~0x1ff; 384 1.32.2.2 pk if (nmp->nm_rsize <= 0) 385 1.32.2.2 pk nmp->nm_rsize = 512; 386 1.32.2.2 pk else if (nmp->nm_rsize > NFS_MAXDATA) 387 1.32.2.2 pk nmp->nm_rsize = NFS_MAXDATA; 388 1.32.2.2 pk adjsock |= (nmp->nm_rsize != osize); 389 1.32.2.2 pk } 390 1.32.2.2 pk if (nmp->nm_rsize > MAXBSIZE) 391 1.32.2.2 pk nmp->nm_rsize = MAXBSIZE; 392 1.32.2.2 pk 393 1.32.2.2 pk if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 && 394 1.32.2.2 pk argp->maxgrouplist <= NFS_MAXGRPS) 395 1.32.2.2 pk nmp->nm_numgrps = argp->maxgrouplist; 396 1.32.2.2 pk if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 && 397 1.32.2.2 pk argp->readahead <= NFS_MAXRAHEAD) 398 1.32.2.2 pk nmp->nm_readahead = argp->readahead; 399 1.32.2.2 pk if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 && 400 1.32.2.2 pk argp->leaseterm <= NQ_MAXLEASE) 401 1.32.2.2 pk nmp->nm_leaseterm = argp->leaseterm; 402 1.32.2.2 pk if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 && 403 1.32.2.2 pk argp->deadthresh <= NQ_NEVERDEAD) 404 1.32.2.2 pk nmp->nm_deadthresh = argp->deadthresh; 405 1.32.2.2 pk 406 1.32.2.2 pk if (nmp->nm_so && adjsock) { 407 1.32.2.2 pk nfs_disconnect(nmp); 408 1.32.2.2 pk if (nmp->nm_sotype == SOCK_DGRAM) 409 1.32.2.2 pk while (nfs_connect(nmp, (struct nfsreq *)0)) { 410 1.32.2.2 pk printf("nfs_args: retrying connect\n"); 411 1.32.2.2 pk (void) tsleep((caddr_t)&lbolt, 412 1.32.2.2 pk PSOCK, "nfscon", 0); 413 1.32.2.2 pk } 414 1.32.2.2 pk } 415 1.32.2.2 pk } 416 1.32.2.2 pk 417 1.32.2.2 pk /* 418 1.32.2.2 pk * VFS Operations. 419 1.32.2.2 pk * 420 1.32.2.2 pk * mount system call 421 1.32.2.2 pk * It seems a bit dumb to copyinstr() the host and path here and then 422 1.32.2.2 pk * bcopy() them in mountnfs(), but I wanted to detect errors before 423 1.32.2.2 pk * doing the sockargs() call because sockargs() allocates an mbuf and 424 1.32.2.2 pk * an error after that means that I have to release the mbuf. 425 1.32.2.2 pk */ 426 1.32.2.2 pk /* ARGSUSED */ 427 1.32.2.2 pk int 428 1.32.2.2 pk nfs_mount(mp, path, data, ndp, p) 429 1.32.2.2 pk struct mount *mp; 430 1.32.2.2 pk char *path; 431 1.32.2.2 pk caddr_t data; 432 1.32.2.2 pk struct nameidata *ndp; 433 1.32.2.2 pk struct proc *p; 434 1.32.2.2 pk { 435 1.32.2.2 pk int error; 436 1.32.2.2 pk struct nfs_args args; 437 1.32.2.2 pk struct mbuf *nam; 438 1.32.2.2 pk struct vnode *vp; 439 1.32.2.2 pk char pth[MNAMELEN], hst[MNAMELEN]; 440 1.32.2.2 pk u_int len; 441 1.32.2.2 pk nfsv2fh_t nfh; 442 1.32.2.2 pk 443 1.32.2.2 pk if (error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args))) 444 1.32.2.2 pk return (error); 445 1.32.2.2 pk if (mp->mnt_flag & MNT_UPDATE) { 446 1.32.2.2 pk register struct nfsmount *nmp = VFSTONFS(mp); 447 1.32.2.2 pk 448 1.32.2.2 pk if (nmp == NULL) 449 1.32.2.2 pk return (EIO); 450 1.32.2.2 pk nfs_decode_args(nmp, &args); 451 1.32.2.2 pk return (0); 452 1.32.2.2 pk } 453 1.32.2.2 pk if (error = copyin((caddr_t)args.fh, (caddr_t)&nfh, sizeof (nfsv2fh_t))) 454 1.32.2.2 pk return (error); 455 1.32.2.2 pk if (error = copyinstr(path, pth, MNAMELEN-1, &len)) 456 1.32.2.2 pk return (error); 457 1.32.2.2 pk bzero(&pth[len], MNAMELEN - len); 458 1.32.2.2 pk if (error = copyinstr(args.hostname, hst, MNAMELEN-1, &len)) 459 1.32.2.2 pk return (error); 460 1.32.2.2 pk bzero(&hst[len], MNAMELEN - len); 461 1.32.2.2 pk /* sockargs() call must be after above copyin() calls */ 462 1.32.2.2 pk if (error = sockargs(&nam, (caddr_t)args.addr, 463 1.32.2.2 pk args.addrlen, MT_SONAME)) 464 1.32.2.2 pk return (error); 465 1.32.2.2 pk args.fh = &nfh; 466 1.32.2.2 pk error = mountnfs(&args, mp, nam, pth, hst, &vp); 467 1.32.2.2 pk return (error); 468 1.32.2.2 pk } 469 1.32.2.2 pk 470 1.32.2.2 pk /* 471 1.32.2.2 pk * Common code for mount and mountroot 472 1.32.2.2 pk */ 473 1.32.2.2 pk int 474 1.32.2.2 pk mountnfs(argp, mp, nam, pth, hst, vpp) 475 1.32.2.2 pk register struct nfs_args *argp; 476 1.32.2.2 pk register struct mount *mp; 477 1.32.2.2 pk struct mbuf *nam; 478 1.32.2.2 pk char *pth, *hst; 479 1.32.2.2 pk struct vnode **vpp; 480 1.32.2.2 pk { 481 1.32.2.2 pk register struct nfsmount *nmp; 482 1.32.2.2 pk struct nfsnode *np; 483 1.32.2.2 pk int error; 484 1.32.2.2 pk 485 1.32.2.2 pk if (mp->mnt_flag & MNT_UPDATE) { 486 1.32.2.2 pk nmp = VFSTONFS(mp); 487 1.32.2.2 pk /* update paths, file handles, etc, here XXX */ 488 1.32.2.2 pk m_freem(nam); 489 1.32.2.2 pk return (0); 490 1.32.2.2 pk } else { 491 1.32.2.2 pk MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount), 492 1.32.2.2 pk M_NFSMNT, M_WAITOK); 493 1.32.2.2 pk bzero((caddr_t)nmp, sizeof (struct nfsmount)); 494 1.32.2.2 pk mp->mnt_data = (qaddr_t)nmp; 495 1.32.2.2 pk } 496 1.32.2.2 pk getnewfsid(mp, makefstype(MOUNT_NFS)); 497 1.32.2.2 pk nmp->nm_mountp = mp; 498 1.32.2.2 pk if ((argp->flags & (NFSMNT_NQNFS | NFSMNT_MYWRITE)) == 499 1.32.2.2 pk (NFSMNT_NQNFS | NFSMNT_MYWRITE)) { 500 1.32.2.2 pk error = EPERM; 501 1.32.2.2 pk goto bad; 502 1.32.2.2 pk } 503 1.32.2.2 pk if (argp->flags & NFSMNT_NQNFS) 504 1.32.2.2 pk /* 505 1.32.2.2 pk * We have to set mnt_maxsymlink to a non-zero value so 506 1.32.2.2 pk * that COMPAT_43 routines will know that we are setting 507 1.32.2.2 pk * the d_type field in directories (and can zero it for 508 1.32.2.2 pk * unsuspecting binaries). 509 1.32.2.2 pk */ 510 1.32.2.2 pk mp->mnt_maxsymlinklen = 1; 511 1.32.2.2 pk nmp->nm_timeo = NFS_TIMEO; 512 1.32.2.2 pk nmp->nm_retry = NFS_RETRANS; 513 1.32.2.2 pk nmp->nm_wsize = NFS_WSIZE; 514 1.32.2.2 pk nmp->nm_rsize = NFS_RSIZE; 515 1.32.2.2 pk nmp->nm_numgrps = NFS_MAXGRPS; 516 1.32.2.2 pk nmp->nm_readahead = NFS_DEFRAHEAD; 517 1.32.2.2 pk nmp->nm_leaseterm = NQ_DEFLEASE; 518 1.32.2.2 pk nmp->nm_deadthresh = NQ_DEADTHRESH; 519 1.32.2.2 pk CIRCLEQ_INIT(&nmp->nm_timerhead); 520 1.32.2.2 pk nmp->nm_inprog = NULLVP; 521 1.32.2.2 pk bcopy((caddr_t)argp->fh, (caddr_t)&nmp->nm_fh, sizeof(nfsv2fh_t)); 522 1.32.2.2 pk #ifdef COMPAT_09 523 1.32.2.2 pk mp->mnt_stat.f_type = 2; 524 1.32.2.2 pk #else 525 1.32.2.2 pk mp->mnt_stat.f_type = 0; 526 1.32.2.2 pk #endif 527 1.32.2.2 pk strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 528 1.32.2.2 pk mp->mnt_stat.f_fstypename[MFSNAMELEN] = '\0'; 529 1.32.2.2 pk bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); 530 1.32.2.2 pk bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); 531 1.32.2.2 pk nmp->nm_nam = nam; 532 1.32.2.2 pk nfs_decode_args(nmp, argp); 533 1.32.2.2 pk 534 1.32.2.2 pk /* Set up the sockets and per-host congestion */ 535 1.32.2.2 pk nmp->nm_sotype = argp->sotype; 536 1.32.2.2 pk nmp->nm_soproto = argp->proto; 537 1.32.2.2 pk 538 1.32.2.2 pk /* 539 1.32.2.2 pk * For Connection based sockets (TCP,...) defer the connect until 540 1.32.2.2 pk * the first request, in case the server is not responding. 541 1.32.2.2 pk */ 542 1.32.2.2 pk if (nmp->nm_sotype == SOCK_DGRAM && 543 1.32.2.2 pk (error = nfs_connect(nmp, (struct nfsreq *)0))) 544 1.32.2.2 pk goto bad; 545 1.32.2.2 pk 546 1.32.2.2 pk /* 547 1.32.2.2 pk * This is silly, but it has to be set so that vinifod() works. 548 1.32.2.2 pk * We do not want to do an nfs_statfs() here since we can get 549 1.32.2.2 pk * stuck on a dead server and we are holding a lock on the mount 550 1.32.2.2 pk * point. 551 1.32.2.2 pk */ 552 1.32.2.2 pk mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA; 553 1.32.2.2 pk /* 554 1.32.2.2 pk * A reference count is needed on the nfsnode representing the 555 1.32.2.2 pk * remote root. If this object is not persistent, then backward 556 1.32.2.2 pk * traversals of the mount point (i.e. "..") will not work if 557 1.32.2.2 pk * the nfsnode gets flushed out of the cache. Ufs does not have 558 1.32.2.2 pk * this problem, because one can identify root inodes by their 559 1.32.2.2 pk * number == ROOTINO (2). 560 1.32.2.2 pk */ 561 1.32.2.2 pk if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 562 1.32.2.2 pk goto bad; 563 1.32.2.2 pk *vpp = NFSTOV(np); 564 1.32.2.2 pk 565 1.32.2.2 pk return (0); 566 1.32.2.2 pk bad: 567 1.32.2.2 pk nfs_disconnect(nmp); 568 1.32.2.2 pk free((caddr_t)nmp, M_NFSMNT); 569 1.32.2.2 pk m_freem(nam); 570 1.32.2.2 pk return (error); 571 1.32.2.2 pk } 572 1.32.2.2 pk 573 1.32.2.2 pk /* 574 1.32.2.2 pk * unmount system call 575 1.32.2.2 pk */ 576 1.32.2.2 pk int 577 1.32.2.2 pk nfs_unmount(mp, mntflags, p) 578 1.32.2.2 pk struct mount *mp; 579 1.32.2.2 pk int mntflags; 580 1.32.2.2 pk struct proc *p; 581 1.32.2.2 pk { 582 1.32.2.2 pk register struct nfsmount *nmp; 583 1.32.2.2 pk struct nfsnode *np; 584 1.32.2.2 pk struct vnode *vp; 585 1.32.2.2 pk int error, flags = 0; 586 1.32.2.2 pk extern int doforce; 587 1.32.2.2 pk 588 1.32.2.2 pk if (mntflags & MNT_FORCE) { 589 1.32.2.2 pk if (!doforce || (mp->mnt_flag & MNT_ROOTFS)) 590 1.32.2.2 pk return (EINVAL); 591 1.32.2.2 pk flags |= FORCECLOSE; 592 1.32.2.2 pk } 593 1.32.2.2 pk nmp = VFSTONFS(mp); 594 1.32.2.2 pk /* 595 1.32.2.2 pk * Goes something like this.. 596 1.32.2.2 pk * - Check for activity on the root vnode (other than ourselves). 597 1.32.2.2 pk * - Call vflush() to clear out vnodes for this file system, 598 1.32.2.2 pk * except for the root vnode. 599 1.32.2.2 pk * - Decrement reference on the vnode representing remote root. 600 1.32.2.2 pk * - Close the socket 601 1.32.2.2 pk * - Free up the data structures 602 1.32.2.2 pk */ 603 1.32.2.2 pk /* 604 1.32.2.2 pk * We need to decrement the ref. count on the nfsnode representing 605 1.32.2.2 pk * the remote root. See comment in mountnfs(). The VFS unmount() 606 1.32.2.2 pk * has done vput on this vnode, otherwise we would get deadlock! 607 1.32.2.2 pk */ 608 1.32.2.2 pk if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 609 1.32.2.2 pk return(error); 610 1.32.2.2 pk vp = NFSTOV(np); 611 1.32.2.2 pk if (vp->v_usecount > 2) { 612 1.32.2.2 pk vput(vp); 613 1.32.2.2 pk return (EBUSY); 614 1.32.2.2 pk } 615 1.32.2.2 pk 616 1.32.2.2 pk /* 617 1.32.2.2 pk * Must handshake with nqnfs_clientd() if it is active. 618 1.32.2.2 pk */ 619 1.32.2.2 pk nmp->nm_flag |= NFSMNT_DISMINPROG; 620 1.32.2.2 pk while (nmp->nm_inprog != NULLVP) 621 1.32.2.2 pk (void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0); 622 1.32.2.2 pk if (error = vflush(mp, vp, flags)) { 623 1.32.2.2 pk vput(vp); 624 1.32.2.2 pk nmp->nm_flag &= ~NFSMNT_DISMINPROG; 625 1.32.2.2 pk return (error); 626 1.32.2.2 pk } 627 1.32.2.2 pk 628 1.32.2.2 pk /* 629 1.32.2.2 pk * We are now committed to the unmount. 630 1.32.2.2 pk * For NQNFS, let the server daemon free the nfsmount structure. 631 1.32.2.2 pk */ 632 1.32.2.2 pk if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) 633 1.32.2.2 pk nmp->nm_flag |= NFSMNT_DISMNT; 634 1.32.2.2 pk 635 1.32.2.2 pk /* 636 1.32.2.2 pk * There are two reference counts to get rid of here. 637 1.32.2.2 pk */ 638 1.32.2.2 pk vrele(vp); 639 1.32.2.2 pk vrele(vp); 640 1.32.2.2 pk vgone(vp); 641 1.32.2.2 pk nfs_disconnect(nmp); 642 1.32.2.2 pk m_freem(nmp->nm_nam); 643 1.32.2.2 pk 644 1.32.2.2 pk if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) 645 1.32.2.2 pk free((caddr_t)nmp, M_NFSMNT); 646 1.32.2.2 pk return (0); 647 1.32.2.2 pk } 648 1.32.2.2 pk 649 1.32.2.2 pk /* 650 1.32.2.2 pk * Return root of a filesystem 651 1.32.2.2 pk */ 652 1.32.2.2 pk int 653 1.32.2.2 pk nfs_root(mp, vpp) 654 1.32.2.2 pk struct mount *mp; 655 1.32.2.2 pk struct vnode **vpp; 656 1.32.2.2 pk { 657 1.32.2.2 pk register struct vnode *vp; 658 1.32.2.2 pk struct nfsmount *nmp; 659 1.32.2.2 pk struct nfsnode *np; 660 1.32.2.2 pk int error; 661 1.32.2.2 pk 662 1.32.2.2 pk nmp = VFSTONFS(mp); 663 1.32.2.2 pk if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 664 1.32.2.2 pk return (error); 665 1.32.2.2 pk vp = NFSTOV(np); 666 1.32.2.2 pk vp->v_type = VDIR; 667 1.32.2.2 pk vp->v_flag = VROOT; 668 1.32.2.2 pk *vpp = vp; 669 1.32.2.2 pk return (0); 670 1.32.2.2 pk } 671 1.32.2.2 pk 672 1.32.2.2 pk extern int syncprt; 673 1.32.2.2 pk 674 1.32.2.2 pk /* 675 1.32.2.2 pk * Flush out the buffer cache 676 1.32.2.2 pk */ 677 1.32.2.2 pk /* ARGSUSED */ 678 1.32.2.2 pk int 679 1.32.2.2 pk nfs_sync(mp, waitfor, cred, p) 680 1.32.2.2 pk struct mount *mp; 681 1.32.2.2 pk int waitfor; 682 1.32.2.2 pk struct ucred *cred; 683 1.32.2.2 pk struct proc *p; 684 1.32.2.2 pk { 685 1.32.2.2 pk register struct vnode *vp; 686 1.32.2.2 pk int error, allerror = 0; 687 1.32.2.2 pk 688 1.32.2.2 pk /* 689 1.32.2.2 pk * Force stale buffer cache information to be flushed. 690 1.32.2.2 pk */ 691 1.32.2.2 pk loop: 692 1.32.2.2 pk for (vp = mp->mnt_vnodelist.lh_first; 693 1.32.2.2 pk vp != NULL; 694 1.32.2.2 pk vp = vp->v_mntvnodes.le_next) { 695 1.32.2.2 pk /* 696 1.32.2.2 pk * If the vnode that we are about to sync is no longer 697 1.32.2.2 pk * associated with this mount point, start over. 698 1.32.2.2 pk */ 699 1.32.2.2 pk if (vp->v_mount != mp) 700 1.32.2.2 pk goto loop; 701 1.32.2.2 pk if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL) 702 1.32.2.2 pk continue; 703 1.32.2.2 pk if (vget(vp, 1)) 704 1.32.2.2 pk goto loop; 705 1.32.2.2 pk if (error = VOP_FSYNC(vp, cred, waitfor, p)) 706 1.32.2.2 pk allerror = error; 707 1.32.2.2 pk vput(vp); 708 1.32.2.2 pk } 709 1.32.2.2 pk return (allerror); 710 1.32.2.2 pk } 711 1.32.2.2 pk 712 1.32.2.2 pk /* 713 1.32.2.2 pk * NFS flat namespace lookup. 714 1.32.2.2 pk * Currently unsupported. 715 1.32.2.2 pk */ 716 1.32.2.2 pk /* ARGSUSED */ 717 1.32.2.2 pk int 718 1.32.2.2 pk nfs_vget(mp, ino, vpp) 719 1.32.2.2 pk struct mount *mp; 720 1.32.2.2 pk ino_t ino; 721 1.32.2.2 pk struct vnode **vpp; 722 1.32.2.2 pk { 723 1.32.2.2 pk 724 1.32.2.2 pk return (EOPNOTSUPP); 725 1.32.2.2 pk } 726 1.32.2.2 pk 727 1.32.2.2 pk /* 728 1.32.2.2 pk * At this point, this should never happen 729 1.32.2.2 pk */ 730 1.32.2.2 pk /* ARGSUSED */ 731 1.32.2.2 pk int 732 1.32.2.2 pk nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 733 1.32.2.2 pk register struct mount *mp; 734 1.32.2.2 pk struct fid *fhp; 735 1.32.2.2 pk struct mbuf *nam; 736 1.32.2.2 pk struct vnode **vpp; 737 1.32.2.2 pk int *exflagsp; 738 1.32.2.2 pk struct ucred **credanonp; 739 1.32.2.2 pk { 740 1.32.2.2 pk 741 1.32.2.2 pk return (EINVAL); 742 1.32.2.2 pk } 743 1.32.2.2 pk 744 1.32.2.2 pk /* 745 1.32.2.2 pk * Vnode pointer to File handle, should never happen either 746 1.32.2.2 pk */ 747 1.32.2.2 pk /* ARGSUSED */ 748 1.32.2.2 pk int 749 1.32.2.2 pk nfs_vptofh(vp, fhp) 750 1.32.2.2 pk struct vnode *vp; 751 1.32.2.2 pk struct fid *fhp; 752 1.32.2.2 pk { 753 1.32.2.2 pk 754 1.32.2.2 pk return (EINVAL); 755 1.32.2.2 pk } 756 1.32.2.2 pk 757 1.32.2.2 pk /* 758 1.32.2.2 pk * Vfs start routine, a no-op. 759 1.32.2.2 pk */ 760 1.32.2.2 pk /* ARGSUSED */ 761 1.32.2.2 pk int 762 1.32.2.2 pk nfs_start(mp, flags, p) 763 1.32.2.2 pk struct mount *mp; 764 1.32.2.2 pk int flags; 765 1.32.2.2 pk struct proc *p; 766 1.32.2.2 pk { 767 1.32.2.2 pk 768 1.32.2.2 pk return (0); 769 1.32.2.2 pk } 770 1.32.2.2 pk 771 1.32.2.2 pk /* 772 1.32.2.2 pk * Do operations associated with quotas, not supported 773 1.32.2.2 pk */ 774 1.32.2.2 pk /* ARGSUSED */ 775 1.32.2.2 pk int 776 1.32.2.2 pk nfs_quotactl(mp, cmd, uid, arg, p) 777 1.32.2.2 pk struct mount *mp; 778 1.32.2.2 pk int cmd; 779 1.32.2.2 pk uid_t uid; 780 1.32.2.2 pk caddr_t arg; 781 1.32.2.2 pk struct proc *p; 782 1.32.2.2 pk { 783 1.32.2.2 pk 784 1.32.2.2 pk return (EOPNOTSUPP); 785 1.32.2.2 pk } 786
Indexes created Wed Oct 01 13:09:50 GMT 2025