1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate * 26*0Sstevel@tonic-gate * Stuff relating to directory reading ... 27*0Sstevel@tonic-gate */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #include <rpc/types.h> 32*0Sstevel@tonic-gate #include <rpc/auth.h> 33*0Sstevel@tonic-gate #include <rpc/xdr.h> 34*0Sstevel@tonic-gate #include "clnt.h" 35*0Sstevel@tonic-gate #include <rpc/rpc_msg.h> 36*0Sstevel@tonic-gate #include <sys/t_lock.h> 37*0Sstevel@tonic-gate #include "nfs_inet.h" 38*0Sstevel@tonic-gate #include <rpc/rpc.h> 39*0Sstevel@tonic-gate #include "brpc.h" 40*0Sstevel@tonic-gate #include <rpcsvc/nfs_prot.h> 41*0Sstevel@tonic-gate #include <sys/types.h> 42*0Sstevel@tonic-gate #include <sys/stat.h> 43*0Sstevel@tonic-gate #include <sys/bootvfs.h> 44*0Sstevel@tonic-gate #include <sys/sysmacros.h> 45*0Sstevel@tonic-gate #include "socket_inet.h" 46*0Sstevel@tonic-gate #include <sys/salib.h> 47*0Sstevel@tonic-gate #include <sys/bootdebug.h> 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate #define MAXDENTS 16 50*0Sstevel@tonic-gate #define MINSIZ 20 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate /* 53*0Sstevel@tonic-gate * Boot needs to be cleaned up to use either dirent32 or dirent64, 54*0Sstevel@tonic-gate * in the meantime use dirent_t and always round to 8 bytes 55*0Sstevel@tonic-gate */ 56*0Sstevel@tonic-gate #define BDIRENT_RECLEN(namelen) \ 57*0Sstevel@tonic-gate ((offsetof(dirent_t, d_name[0]) + 1 + (namelen) + 7) & ~ 7) 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #define dprintf if (boothowto & RB_DEBUG) printf 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate /* 62*0Sstevel@tonic-gate * Get directory entries: 63*0Sstevel@tonic-gate * 64*0Sstevel@tonic-gate * Uses the nfs "READDIR" operation to read directory entries 65*0Sstevel@tonic-gate * into a local buffer. These are then translated into file 66*0Sstevel@tonic-gate * system independent "dirent" structs and returned in the 67*0Sstevel@tonic-gate * caller's buffer. Returns the number of entries converted 68*0Sstevel@tonic-gate * (-1 if there's an error). 69*0Sstevel@tonic-gate * 70*0Sstevel@tonic-gate * Although the xdr functions can allocate memory, we have 71*0Sstevel@tonic-gate * a limited heap so we allocate our own space, 72*0Sstevel@tonic-gate * assuming the worst case of 256 byte names. 73*0Sstevel@tonic-gate * This is a space hog in our local buffer, so we want 74*0Sstevel@tonic-gate * the number of buffers to be small. To make sure we don't 75*0Sstevel@tonic-gate * get more names than we can handle, we tell the rpc 76*0Sstevel@tonic-gate * routine that we only have space for MAXDENT names if 77*0Sstevel@tonic-gate * they are all the minimum size. This keeps the return 78*0Sstevel@tonic-gate * packet unfragmented, but may result in lots of reads 79*0Sstevel@tonic-gate * to process a large directory. Since this is standalone 80*0Sstevel@tonic-gate * we don't worry about speed. With MAXDENTs at 16, the 81*0Sstevel@tonic-gate * local buffer is 4k. 82*0Sstevel@tonic-gate */ 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate int 85*0Sstevel@tonic-gate nfsgetdents(struct nfs_file *nfp, struct dirent *dep, unsigned size) 86*0Sstevel@tonic-gate { 87*0Sstevel@tonic-gate entry *ep; 88*0Sstevel@tonic-gate readdirargs rda; 89*0Sstevel@tonic-gate readdirres res; 90*0Sstevel@tonic-gate enum clnt_stat status; 91*0Sstevel@tonic-gate struct { 92*0Sstevel@tonic-gate entry etlist[MAXDENTS]; 93*0Sstevel@tonic-gate char names[MAXDENTS][NFS_MAXNAMLEN+1]; 94*0Sstevel@tonic-gate } rdbuf; 95*0Sstevel@tonic-gate uint32_t offset; 96*0Sstevel@tonic-gate int j, cnt = 0; 97*0Sstevel@tonic-gate struct timeval zero_timeout = {0, 0}; /* default */ 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate bzero((caddr_t)&res, sizeof (res)); 100*0Sstevel@tonic-gate bzero((caddr_t)&rda, sizeof (rda)); 101*0Sstevel@tonic-gate bzero((caddr_t)rdbuf.etlist, sizeof (rdbuf.etlist)); 102*0Sstevel@tonic-gate bcopy((caddr_t)&nfp->fh.fh2, (caddr_t)&rda.dir, NFS_FHSIZE); 103*0Sstevel@tonic-gate bcopy((caddr_t)nfp->cookie.cookie2, (caddr_t)rda.cookie, 104*0Sstevel@tonic-gate sizeof (nfscookie)); 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate while (!res.readdirres_u.reply.eof) { 107*0Sstevel@tonic-gate /* 108*0Sstevel@tonic-gate * Keep issuing nfs calls until EOF is reached on 109*0Sstevel@tonic-gate * the directory or the user buffer is filled. 110*0Sstevel@tonic-gate */ 111*0Sstevel@tonic-gate 112*0Sstevel@tonic-gate for (j = 0; j < MAXDENTS; j++) { 113*0Sstevel@tonic-gate /* 114*0Sstevel@tonic-gate * Link our buffers together for the benefit of 115*0Sstevel@tonic-gate * XDR. We do this each time we issue the rpc call 116*0Sstevel@tonic-gate * JIC the xdr decode 117*0Sstevel@tonic-gate * routines screw up the linkage! 118*0Sstevel@tonic-gate */ 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate rdbuf.etlist[j].name = rdbuf.names[(MAXDENTS-1) - j]; 121*0Sstevel@tonic-gate rdbuf.etlist[j].nextentry = 122*0Sstevel@tonic-gate (j < (MAXDENTS-1)) ? &rdbuf.etlist[j+1] : 0; 123*0Sstevel@tonic-gate } 124*0Sstevel@tonic-gate 125*0Sstevel@tonic-gate res.readdirres_u.reply.entries = rdbuf.etlist; 126*0Sstevel@tonic-gate /* 127*0Sstevel@tonic-gate * Cannot give the whole buffer unless every name is 128*0Sstevel@tonic-gate * 256 bytes! Assume the worst case of all 1 byte names. 129*0Sstevel@tonic-gate * This results in MINSIZ bytes/name in the xdr stream. 130*0Sstevel@tonic-gate */ 131*0Sstevel@tonic-gate rda.count = sizeof (res) + MAXDENTS*MINSIZ; 132*0Sstevel@tonic-gate bzero((caddr_t)rdbuf.names, sizeof (rdbuf.names)); 133*0Sstevel@tonic-gate 134*0Sstevel@tonic-gate status = CLNT_CALL(root_CLIENT, NFSPROC_READDIR, 135*0Sstevel@tonic-gate xdr_readdirargs, (caddr_t)&rda, 136*0Sstevel@tonic-gate xdr_readdirres, (caddr_t)&res, zero_timeout); 137*0Sstevel@tonic-gate 138*0Sstevel@tonic-gate if (status != RPC_SUCCESS) { 139*0Sstevel@tonic-gate dprintf("nfs_getdents: RPC error\n"); 140*0Sstevel@tonic-gate return (-1); 141*0Sstevel@tonic-gate } 142*0Sstevel@tonic-gate if (res.status != NFS_OK) { 143*0Sstevel@tonic-gate /* 144*0Sstevel@tonic-gate * The most common failure here would be trying to 145*0Sstevel@tonic-gate * issue a getdents call on a non-directory! 146*0Sstevel@tonic-gate */ 147*0Sstevel@tonic-gate 148*0Sstevel@tonic-gate nfs_error(res.status); 149*0Sstevel@tonic-gate return (-1); 150*0Sstevel@tonic-gate } 151*0Sstevel@tonic-gate 152*0Sstevel@tonic-gate for (ep = rdbuf.etlist; ep; ep = ep->nextentry) { 153*0Sstevel@tonic-gate /* 154*0Sstevel@tonic-gate * Step thru all entries returned by NFS, converting 155*0Sstevel@tonic-gate * to the cannonical form and copying out to the 156*0Sstevel@tonic-gate * user's buffer. 157*0Sstevel@tonic-gate */ 158*0Sstevel@tonic-gate 159*0Sstevel@tonic-gate int n; 160*0Sstevel@tonic-gate 161*0Sstevel@tonic-gate /* 162*0Sstevel@tonic-gate * catch the case user called at EOF 163*0Sstevel@tonic-gate */ 164*0Sstevel@tonic-gate if ((n = strlen(ep->name)) == 0) 165*0Sstevel@tonic-gate return (cnt); 166*0Sstevel@tonic-gate 167*0Sstevel@tonic-gate n = BDIRENT_RECLEN(n); 168*0Sstevel@tonic-gate 169*0Sstevel@tonic-gate if (n > size) 170*0Sstevel@tonic-gate return (cnt); 171*0Sstevel@tonic-gate size -= n; 172*0Sstevel@tonic-gate 173*0Sstevel@tonic-gate (void) strcpy(dep->d_name, ep->name); 174*0Sstevel@tonic-gate dep->d_ino = ep->fileid; 175*0Sstevel@tonic-gate bcopy(ep->cookie, &offset, sizeof (nfscookie)); 176*0Sstevel@tonic-gate dep->d_off = offset; 177*0Sstevel@tonic-gate dep->d_reclen = (ushort_t)n; 178*0Sstevel@tonic-gate 179*0Sstevel@tonic-gate dep = (struct dirent *)((char *)dep + n); 180*0Sstevel@tonic-gate bcopy(ep->cookie, rda.cookie, sizeof (nfscookie)); 181*0Sstevel@tonic-gate bcopy(ep->cookie, nfp->cookie.cookie2, 182*0Sstevel@tonic-gate sizeof (nfscookie)); 183*0Sstevel@tonic-gate cnt++; 184*0Sstevel@tonic-gate } 185*0Sstevel@tonic-gate } 186*0Sstevel@tonic-gate 187*0Sstevel@tonic-gate return (cnt); 188*0Sstevel@tonic-gate } 189