1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from nfs_node.c 8.6 (Berkeley) 5/22/95 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/fcntl.h> 41 #include <sys/lock.h> 42 #include <sys/malloc.h> 43 #include <sys/mount.h> 44 #include <sys/namei.h> 45 #include <sys/proc.h> 46 #include <sys/socket.h> 47 #include <sys/sysctl.h> 48 #include <sys/vnode.h> 49 50 #include <vm/uma.h> 51 52 #include <fs/nfs/nfsport.h> 53 #include <fs/nfsclient/nfsnode.h> 54 #include <fs/nfsclient/nfsmount.h> 55 #include <fs/nfsclient/nfs.h> 56 57 #include <nfs/nfs_lock.h> 58 59 extern struct vop_vector newnfs_vnodeops; 60 extern struct buf_ops buf_ops_newnfs; 61 MALLOC_DECLARE(M_NEWNFSREQ); 62 63 uma_zone_t newnfsnode_zone; 64 65 void 66 ncl_nhinit(void) 67 { 68 69 newnfsnode_zone = uma_zcreate("NCLNODE", sizeof(struct nfsnode), NULL, 70 NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 71 } 72 73 void 74 ncl_nhuninit(void) 75 { 76 uma_zdestroy(newnfsnode_zone); 77 } 78 79 /* 80 * ONLY USED FOR THE ROOT DIRECTORY. nfscl_nget() does the rest. If this 81 * function is going to be used to get Regular Files, code must be added 82 * to fill in the "struct nfsv4node". 83 * Look up a vnode/nfsnode by file handle. 84 * Callers must check for mount points!! 85 * In all cases, a pointer to a 86 * nfsnode structure is returned. 87 */ 88 int 89 ncl_nget(struct mount *mntp, u_int8_t *fhp, int fhsize, struct nfsnode **npp) 90 { 91 struct thread *td = curthread; /* XXX */ 92 struct nfsnode *np; 93 struct vnode *vp; 94 struct vnode *nvp; 95 int error; 96 u_int hash; 97 struct nfsmount *nmp; 98 struct nfsfh *nfhp; 99 100 nmp = VFSTONFS(mntp); 101 *npp = NULL; 102 103 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 104 105 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 106 M_NFSFH, M_WAITOK); 107 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 108 nfhp->nfh_len = fhsize; 109 error = vfs_hash_get(mntp, hash, LK_EXCLUSIVE, 110 td, &nvp, newnfs_vncmpf, nfhp); 111 FREE(nfhp, M_NFSFH); 112 if (error) 113 return (error); 114 if (nvp != NULL) { 115 *npp = VTONFS(nvp); 116 return (0); 117 } 118 119 /* 120 * Allocate before getnewvnode since doing so afterward 121 * might cause a bogus v_data pointer to get dereferenced 122 * elsewhere if zalloc should block. 123 */ 124 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 125 126 error = getnewvnode("newnfs", mntp, &newnfs_vnodeops, &nvp); 127 if (error) { 128 uma_zfree(newnfsnode_zone, np); 129 return (error); 130 } 131 vp = nvp; 132 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 133 vp->v_data = np; 134 np->n_vnode = vp; 135 /* 136 * Initialize the mutex even if the vnode is going to be a loser. 137 * This simplifies the logic in reclaim, which can then unconditionally 138 * destroy the mutex (in the case of the loser, or if hash_insert 139 * happened to return an error no special casing is needed). 140 */ 141 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 142 /* 143 * NFS supports recursive and shared locking. 144 */ 145 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 146 VN_LOCK_AREC(vp); 147 VN_LOCK_ASHARE(vp); 148 /* 149 * Are we getting the root? If so, make sure the vnode flags 150 * are correct 151 */ 152 if ((fhsize == nmp->nm_fhsize) && 153 !bcmp(fhp, nmp->nm_fh, fhsize)) { 154 if (vp->v_type == VNON) 155 vp->v_type = VDIR; 156 vp->v_vflag |= VV_ROOT; 157 } 158 159 MALLOC(np->n_fhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 160 M_NFSFH, M_WAITOK); 161 bcopy(fhp, np->n_fhp->nfh_fh, fhsize); 162 np->n_fhp->nfh_len = fhsize; 163 error = insmntque(vp, mntp); 164 if (error != 0) { 165 *npp = NULL; 166 FREE((caddr_t)np->n_fhp, M_NFSFH); 167 mtx_destroy(&np->n_mtx); 168 uma_zfree(newnfsnode_zone, np); 169 return (error); 170 } 171 error = vfs_hash_insert(vp, hash, LK_EXCLUSIVE, 172 td, &nvp, newnfs_vncmpf, np->n_fhp); 173 if (error) 174 return (error); 175 if (nvp != NULL) { 176 *npp = VTONFS(nvp); 177 /* vfs_hash_insert() vput()'s the losing vnode */ 178 return (0); 179 } 180 *npp = np; 181 182 return (0); 183 } 184 185 int 186 ncl_inactive(struct vop_inactive_args *ap) 187 { 188 struct nfsnode *np; 189 struct sillyrename *sp; 190 struct vnode *vp = ap->a_vp; 191 192 np = VTONFS(vp); 193 194 if (NFS_ISV4(vp) && vp->v_type == VREG) { 195 /* 196 * Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4 197 * Close operations are delayed until now. Any dirty buffers 198 * must be flushed before the close, so that the stateid is 199 * available for the writes. 200 */ 201 (void) ncl_flush(vp, MNT_WAIT, NULL, ap->a_td, 1, 0); 202 (void) nfsrpc_close(vp, 1, ap->a_td); 203 } 204 205 if (vp->v_type != VDIR) { 206 sp = np->n_sillyrename; 207 np->n_sillyrename = NULL; 208 } else 209 sp = NULL; 210 if (sp) { 211 (void) ncl_vinvalbuf(vp, 0, ap->a_td, 1); 212 /* 213 * Remove the silly file that was rename'd earlier 214 */ 215 ncl_removeit(sp, vp); 216 crfree(sp->s_cred); 217 vrele(sp->s_dvp); 218 FREE((caddr_t)sp, M_NEWNFSREQ); 219 } 220 np->n_flag &= NMODIFIED; 221 return (0); 222 } 223 224 /* 225 * Reclaim an nfsnode so that it can be used for other purposes. 226 */ 227 int 228 ncl_reclaim(struct vop_reclaim_args *ap) 229 { 230 struct vnode *vp = ap->a_vp; 231 struct nfsnode *np = VTONFS(vp); 232 struct nfsdmap *dp, *dp2; 233 234 if (NFS_ISV4(vp) && vp->v_type == VREG) 235 /* 236 * Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4 237 * Close operations are delayed until ncl_inactive(). 238 * However, since VOP_INACTIVE() is not guaranteed to be 239 * called, we need to do it again here. 240 */ 241 (void) nfsrpc_close(vp, 1, ap->a_td); 242 243 /* 244 * If the NLM is running, give it a chance to abort pending 245 * locks. 246 */ 247 if (nfs_reclaim_p != NULL) 248 nfs_reclaim_p(ap); 249 250 /* 251 * Destroy the vm object and flush associated pages. 252 */ 253 vnode_destroy_vobject(vp); 254 255 vfs_hash_remove(vp); 256 257 /* 258 * Call nfscl_reclaimnode() to save attributes in the delegation, 259 * as required. 260 */ 261 if (vp->v_type == VREG) 262 nfscl_reclaimnode(vp); 263 264 /* 265 * Free up any directory cookie structures and 266 * large file handle structures that might be associated with 267 * this nfs node. 268 */ 269 if (vp->v_type == VDIR) { 270 dp = LIST_FIRST(&np->n_cookies); 271 while (dp) { 272 dp2 = dp; 273 dp = LIST_NEXT(dp, ndm_list); 274 FREE((caddr_t)dp2, M_NFSDIROFF); 275 } 276 } 277 FREE((caddr_t)np->n_fhp, M_NFSFH); 278 if (np->n_v4 != NULL) 279 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 280 mtx_destroy(&np->n_mtx); 281 uma_zfree(newnfsnode_zone, vp->v_data); 282 vp->v_data = NULL; 283 return (0); 284 } 285 286 /* 287 * Invalidate both the access and attribute caches for this vnode. 288 */ 289 void 290 ncl_invalcaches(struct vnode *vp) 291 { 292 struct nfsnode *np = VTONFS(vp); 293 int i; 294 295 mtx_lock(&np->n_mtx); 296 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) 297 np->n_accesscache[i].stamp = 0; 298 np->n_attrstamp = 0; 299 mtx_unlock(&np->n_mtx); 300 } 301 302