nfs_clnode.c revision 237244
1191783Srmacklem/*- 2191783Srmacklem * Copyright (c) 1989, 1993 3191783Srmacklem * The Regents of the University of California. All rights reserved. 4191783Srmacklem * 5191783Srmacklem * This code is derived from software contributed to Berkeley by 6191783Srmacklem * Rick Macklem at The University of Guelph. 7191783Srmacklem * 8191783Srmacklem * Redistribution and use in source and binary forms, with or without 9191783Srmacklem * modification, are permitted provided that the following conditions 10191783Srmacklem * are met: 11191783Srmacklem * 1. Redistributions of source code must retain the above copyright 12191783Srmacklem * notice, this list of conditions and the following disclaimer. 13191783Srmacklem * 2. Redistributions in binary form must reproduce the above copyright 14191783Srmacklem * notice, this list of conditions and the following disclaimer in the 15191783Srmacklem * documentation and/or other materials provided with the distribution. 16191783Srmacklem * 4. Neither the name of the University nor the names of its contributors 17191783Srmacklem * may be used to endorse or promote products derived from this software 18191783Srmacklem * without specific prior written permission. 19191783Srmacklem * 20191783Srmacklem * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21191783Srmacklem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22191783Srmacklem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23191783Srmacklem * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24191783Srmacklem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25191783Srmacklem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26191783Srmacklem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27191783Srmacklem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28191783Srmacklem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29191783Srmacklem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30191783Srmacklem * SUCH DAMAGE. 31191783Srmacklem * 32191783Srmacklem * from nfs_node.c 8.6 (Berkeley) 5/22/95 33191783Srmacklem */ 34191783Srmacklem 35191783Srmacklem#include <sys/cdefs.h> 36191783Srmacklem__FBSDID("$FreeBSD: head/sys/fs/nfsclient/nfs_clnode.c 237244 2012-06-18 22:17:28Z rmacklem $"); 37191783Srmacklem 38223280Srmacklem#include "opt_kdtrace.h" 39223280Srmacklem 40191783Srmacklem#include <sys/param.h> 41191783Srmacklem#include <sys/systm.h> 42214048Srmacklem#include <sys/fcntl.h> 43191783Srmacklem#include <sys/lock.h> 44191783Srmacklem#include <sys/malloc.h> 45191783Srmacklem#include <sys/mount.h> 46191783Srmacklem#include <sys/namei.h> 47191783Srmacklem#include <sys/proc.h> 48191783Srmacklem#include <sys/socket.h> 49191783Srmacklem#include <sys/sysctl.h> 50224606Srmacklem#include <sys/taskqueue.h> 51191783Srmacklem#include <sys/vnode.h> 52191783Srmacklem 53191783Srmacklem#include <vm/uma.h> 54191783Srmacklem 55191783Srmacklem#include <fs/nfs/nfsport.h> 56191783Srmacklem#include <fs/nfsclient/nfsnode.h> 57191783Srmacklem#include <fs/nfsclient/nfsmount.h> 58191783Srmacklem#include <fs/nfsclient/nfs.h> 59223280Srmacklem#include <fs/nfsclient/nfs_kdtrace.h> 60191783Srmacklem 61214048Srmacklem#include <nfs/nfs_lock.h> 62214048Srmacklem 63191783Srmacklemextern struct vop_vector newnfs_vnodeops; 64191783Srmacklemextern struct buf_ops buf_ops_newnfs; 65191783SrmacklemMALLOC_DECLARE(M_NEWNFSREQ); 66191783Srmacklem 67191783Srmacklemuma_zone_t newnfsnode_zone; 68191783Srmacklem 69224606Srmacklemstatic void nfs_freesillyrename(void *arg, __unused int pending); 70224606Srmacklem 71191783Srmacklemvoid 72191783Srmacklemncl_nhinit(void) 73191783Srmacklem{ 74191783Srmacklem 75191783Srmacklem newnfsnode_zone = uma_zcreate("NCLNODE", sizeof(struct nfsnode), NULL, 76191783Srmacklem NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 77191783Srmacklem} 78191783Srmacklem 79191783Srmacklemvoid 80191783Srmacklemncl_nhuninit(void) 81191783Srmacklem{ 82191783Srmacklem uma_zdestroy(newnfsnode_zone); 83191783Srmacklem} 84191783Srmacklem 85191783Srmacklem/* 86191783Srmacklem * ONLY USED FOR THE ROOT DIRECTORY. nfscl_nget() does the rest. If this 87191783Srmacklem * function is going to be used to get Regular Files, code must be added 88191783Srmacklem * to fill in the "struct nfsv4node". 89191783Srmacklem * Look up a vnode/nfsnode by file handle. 90191783Srmacklem * Callers must check for mount points!! 91191783Srmacklem * In all cases, a pointer to a 92191783Srmacklem * nfsnode structure is returned. 93191783Srmacklem */ 94191783Srmacklemint 95220732Srmacklemncl_nget(struct mount *mntp, u_int8_t *fhp, int fhsize, struct nfsnode **npp, 96220732Srmacklem int lkflags) 97191783Srmacklem{ 98191783Srmacklem struct thread *td = curthread; /* XXX */ 99191783Srmacklem struct nfsnode *np; 100191783Srmacklem struct vnode *vp; 101191783Srmacklem struct vnode *nvp; 102191783Srmacklem int error; 103191783Srmacklem u_int hash; 104191783Srmacklem struct nfsmount *nmp; 105191783Srmacklem struct nfsfh *nfhp; 106191783Srmacklem 107191783Srmacklem nmp = VFSTONFS(mntp); 108191783Srmacklem *npp = NULL; 109191783Srmacklem 110191783Srmacklem hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 111191783Srmacklem 112191783Srmacklem MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 113191783Srmacklem M_NFSFH, M_WAITOK); 114191783Srmacklem bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 115191783Srmacklem nfhp->nfh_len = fhsize; 116220732Srmacklem error = vfs_hash_get(mntp, hash, lkflags, 117191783Srmacklem td, &nvp, newnfs_vncmpf, nfhp); 118191783Srmacklem FREE(nfhp, M_NFSFH); 119191783Srmacklem if (error) 120191783Srmacklem return (error); 121191783Srmacklem if (nvp != NULL) { 122191783Srmacklem *npp = VTONFS(nvp); 123191783Srmacklem return (0); 124191783Srmacklem } 125191783Srmacklem 126191783Srmacklem /* 127191783Srmacklem * Allocate before getnewvnode since doing so afterward 128191783Srmacklem * might cause a bogus v_data pointer to get dereferenced 129191783Srmacklem * elsewhere if zalloc should block. 130191783Srmacklem */ 131191783Srmacklem np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 132191783Srmacklem 133191783Srmacklem error = getnewvnode("newnfs", mntp, &newnfs_vnodeops, &nvp); 134191783Srmacklem if (error) { 135191783Srmacklem uma_zfree(newnfsnode_zone, np); 136191783Srmacklem return (error); 137191783Srmacklem } 138191783Srmacklem vp = nvp; 139230605Srmacklem KASSERT(vp->v_bufobj.bo_bsize != 0, ("ncl_nget: bo_bsize == 0")); 140191783Srmacklem vp->v_bufobj.bo_ops = &buf_ops_newnfs; 141191783Srmacklem vp->v_data = np; 142191783Srmacklem np->n_vnode = vp; 143191783Srmacklem /* 144191783Srmacklem * Initialize the mutex even if the vnode is going to be a loser. 145191783Srmacklem * This simplifies the logic in reclaim, which can then unconditionally 146191783Srmacklem * destroy the mutex (in the case of the loser, or if hash_insert 147191783Srmacklem * happened to return an error no special casing is needed). 148191783Srmacklem */ 149191783Srmacklem mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 150191783Srmacklem /* 151191783Srmacklem * NFS supports recursive and shared locking. 152191783Srmacklem */ 153211531Sjhb lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 154191783Srmacklem VN_LOCK_AREC(vp); 155191783Srmacklem VN_LOCK_ASHARE(vp); 156191783Srmacklem /* 157191783Srmacklem * Are we getting the root? If so, make sure the vnode flags 158191783Srmacklem * are correct 159191783Srmacklem */ 160191783Srmacklem if ((fhsize == nmp->nm_fhsize) && 161191783Srmacklem !bcmp(fhp, nmp->nm_fh, fhsize)) { 162191783Srmacklem if (vp->v_type == VNON) 163191783Srmacklem vp->v_type = VDIR; 164191783Srmacklem vp->v_vflag |= VV_ROOT; 165191783Srmacklem } 166191783Srmacklem 167191783Srmacklem MALLOC(np->n_fhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 168191783Srmacklem M_NFSFH, M_WAITOK); 169191783Srmacklem bcopy(fhp, np->n_fhp->nfh_fh, fhsize); 170191783Srmacklem np->n_fhp->nfh_len = fhsize; 171191783Srmacklem error = insmntque(vp, mntp); 172191783Srmacklem if (error != 0) { 173191783Srmacklem *npp = NULL; 174191783Srmacklem FREE((caddr_t)np->n_fhp, M_NFSFH); 175191783Srmacklem mtx_destroy(&np->n_mtx); 176191783Srmacklem uma_zfree(newnfsnode_zone, np); 177191783Srmacklem return (error); 178191783Srmacklem } 179220732Srmacklem error = vfs_hash_insert(vp, hash, lkflags, 180191783Srmacklem td, &nvp, newnfs_vncmpf, np->n_fhp); 181191783Srmacklem if (error) 182191783Srmacklem return (error); 183191783Srmacklem if (nvp != NULL) { 184191783Srmacklem *npp = VTONFS(nvp); 185191783Srmacklem /* vfs_hash_insert() vput()'s the losing vnode */ 186191783Srmacklem return (0); 187191783Srmacklem } 188191783Srmacklem *npp = np; 189191783Srmacklem 190191783Srmacklem return (0); 191191783Srmacklem} 192191783Srmacklem 193224606Srmacklem/* 194224606Srmacklem * Do the vrele(sp->s_dvp) as a separate task in order to avoid a 195224606Srmacklem * deadlock because of a LOR when vrele() locks the directory vnode. 196224606Srmacklem */ 197224606Srmacklemstatic void 198224606Srmacklemnfs_freesillyrename(void *arg, __unused int pending) 199224606Srmacklem{ 200224606Srmacklem struct sillyrename *sp; 201224606Srmacklem 202224606Srmacklem sp = arg; 203224606Srmacklem vrele(sp->s_dvp); 204224606Srmacklem free(sp, M_NEWNFSREQ); 205224606Srmacklem} 206224606Srmacklem 207191783Srmacklemint 208191783Srmacklemncl_inactive(struct vop_inactive_args *ap) 209191783Srmacklem{ 210191783Srmacklem struct nfsnode *np; 211191783Srmacklem struct sillyrename *sp; 212193125Srmacklem struct vnode *vp = ap->a_vp; 213237244Srmacklem boolean_t retv; 214191783Srmacklem 215193125Srmacklem np = VTONFS(vp); 216192337Srmacklem 217193125Srmacklem if (NFS_ISV4(vp) && vp->v_type == VREG) { 218192928Srmacklem /* 219192928Srmacklem * Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4 220237244Srmacklem * Close operations are delayed until now. Any dirty 221237244Srmacklem * buffers/pages must be flushed before the close, so that the 222237244Srmacklem * stateid is available for the writes. 223192928Srmacklem */ 224237244Srmacklem if (vp->v_object != NULL) { 225237244Srmacklem VM_OBJECT_LOCK(vp->v_object); 226237244Srmacklem retv = vm_object_page_clean(vp->v_object, 0, 0, 227237244Srmacklem OBJPC_SYNC); 228237244Srmacklem VM_OBJECT_UNLOCK(vp->v_object); 229237244Srmacklem } else 230237244Srmacklem retv = TRUE; 231237244Srmacklem if (retv == TRUE) { 232237244Srmacklem (void)ncl_flush(vp, MNT_WAIT, NULL, ap->a_td, 1, 0); 233237244Srmacklem (void)nfsrpc_close(vp, 1, ap->a_td); 234237244Srmacklem } 235192928Srmacklem } 236192337Srmacklem 237220731Srmacklem mtx_lock(&np->n_mtx); 238193125Srmacklem if (vp->v_type != VDIR) { 239191783Srmacklem sp = np->n_sillyrename; 240191783Srmacklem np->n_sillyrename = NULL; 241191783Srmacklem } else 242191783Srmacklem sp = NULL; 243191783Srmacklem if (sp) { 244220731Srmacklem mtx_unlock(&np->n_mtx); 245193125Srmacklem (void) ncl_vinvalbuf(vp, 0, ap->a_td, 1); 246191783Srmacklem /* 247191783Srmacklem * Remove the silly file that was rename'd earlier 248191783Srmacklem */ 249193125Srmacklem ncl_removeit(sp, vp); 250191783Srmacklem crfree(sp->s_cred); 251224606Srmacklem TASK_INIT(&sp->s_task, 0, nfs_freesillyrename, sp); 252224606Srmacklem taskqueue_enqueue(taskqueue_thread, &sp->s_task); 253220731Srmacklem mtx_lock(&np->n_mtx); 254191783Srmacklem } 255191783Srmacklem np->n_flag &= NMODIFIED; 256220731Srmacklem mtx_unlock(&np->n_mtx); 257191783Srmacklem return (0); 258191783Srmacklem} 259191783Srmacklem 260191783Srmacklem/* 261191783Srmacklem * Reclaim an nfsnode so that it can be used for other purposes. 262191783Srmacklem */ 263191783Srmacklemint 264191783Srmacklemncl_reclaim(struct vop_reclaim_args *ap) 265191783Srmacklem{ 266191783Srmacklem struct vnode *vp = ap->a_vp; 267191783Srmacklem struct nfsnode *np = VTONFS(vp); 268191783Srmacklem struct nfsdmap *dp, *dp2; 269191783Srmacklem 270191783Srmacklem /* 271191783Srmacklem * If the NLM is running, give it a chance to abort pending 272191783Srmacklem * locks. 273191783Srmacklem */ 274214048Srmacklem if (nfs_reclaim_p != NULL) 275214048Srmacklem nfs_reclaim_p(ap); 276191783Srmacklem 277191783Srmacklem /* 278191783Srmacklem * Destroy the vm object and flush associated pages. 279191783Srmacklem */ 280191783Srmacklem vnode_destroy_vobject(vp); 281191783Srmacklem 282237200Srmacklem if (NFS_ISV4(vp) && vp->v_type == VREG) 283237200Srmacklem /* 284237200Srmacklem * We can now safely close any remaining NFSv4 Opens for 285237200Srmacklem * this file. Most opens will have already been closed by 286237200Srmacklem * ncl_inactive(), but there are cases where it is not 287237200Srmacklem * called, so we need to do it again here. 288237200Srmacklem */ 289237200Srmacklem (void) nfsrpc_close(vp, 1, ap->a_td); 290237200Srmacklem 291191783Srmacklem vfs_hash_remove(vp); 292191783Srmacklem 293191783Srmacklem /* 294191783Srmacklem * Call nfscl_reclaimnode() to save attributes in the delegation, 295191783Srmacklem * as required. 296191783Srmacklem */ 297191783Srmacklem if (vp->v_type == VREG) 298191783Srmacklem nfscl_reclaimnode(vp); 299191783Srmacklem 300191783Srmacklem /* 301191783Srmacklem * Free up any directory cookie structures and 302191783Srmacklem * large file handle structures that might be associated with 303191783Srmacklem * this nfs node. 304191783Srmacklem */ 305191783Srmacklem if (vp->v_type == VDIR) { 306191783Srmacklem dp = LIST_FIRST(&np->n_cookies); 307191783Srmacklem while (dp) { 308191783Srmacklem dp2 = dp; 309191783Srmacklem dp = LIST_NEXT(dp, ndm_list); 310191783Srmacklem FREE((caddr_t)dp2, M_NFSDIROFF); 311191783Srmacklem } 312191783Srmacklem } 313235332Srmacklem if (np->n_writecred != NULL) 314235332Srmacklem crfree(np->n_writecred); 315191783Srmacklem FREE((caddr_t)np->n_fhp, M_NFSFH); 316191783Srmacklem if (np->n_v4 != NULL) 317191783Srmacklem FREE((caddr_t)np->n_v4, M_NFSV4NODE); 318191783Srmacklem mtx_destroy(&np->n_mtx); 319191783Srmacklem uma_zfree(newnfsnode_zone, vp->v_data); 320191783Srmacklem vp->v_data = NULL; 321191783Srmacklem return (0); 322191783Srmacklem} 323191783Srmacklem 324191783Srmacklem/* 325191783Srmacklem * Invalidate both the access and attribute caches for this vnode. 326191783Srmacklem */ 327191783Srmacklemvoid 328191783Srmacklemncl_invalcaches(struct vnode *vp) 329191783Srmacklem{ 330191783Srmacklem struct nfsnode *np = VTONFS(vp); 331191783Srmacklem int i; 332191783Srmacklem 333191783Srmacklem mtx_lock(&np->n_mtx); 334191783Srmacklem for (i = 0; i < NFS_ACCESSCACHESIZE; i++) 335191783Srmacklem np->n_accesscache[i].stamp = 0; 336223280Srmacklem KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp); 337191783Srmacklem np->n_attrstamp = 0; 338223280Srmacklem KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 339191783Srmacklem mtx_unlock(&np->n_mtx); 340191783Srmacklem} 341191783Srmacklem 342