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 NFSv3 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
nfs3getdents(struct nfs_file * nfp,struct dirent * dep,unsigned size)85*0Sstevel@tonic-gate nfs3getdents(struct nfs_file *nfp, struct dirent *dep, unsigned size)
86*0Sstevel@tonic-gate {
87*0Sstevel@tonic-gate int cnt = 0;
88*0Sstevel@tonic-gate entry3 *ep;
89*0Sstevel@tonic-gate READDIR3args rda;
90*0Sstevel@tonic-gate READDIR3res res;
91*0Sstevel@tonic-gate enum clnt_stat status;
92*0Sstevel@tonic-gate struct {
93*0Sstevel@tonic-gate entry3 etlist[MAXDENTS];
94*0Sstevel@tonic-gate char names[MAXDENTS][NFS_MAXNAMLEN+1];
95*0Sstevel@tonic-gate } rdbuf;
96*0Sstevel@tonic-gate int j;
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
103*0Sstevel@tonic-gate rda.dir.data.data_len = nfp->fh.fh3.len;
104*0Sstevel@tonic-gate rda.dir.data.data_val = nfp->fh.fh3.data;
105*0Sstevel@tonic-gate rda.cookie = nfp->cookie.cookie3;
106*0Sstevel@tonic-gate
107*0Sstevel@tonic-gate while (!res.READDIR3res_u.resok.reply.eof) {
108*0Sstevel@tonic-gate /*
109*0Sstevel@tonic-gate * Keep issuing nfs calls until EOF is reached on
110*0Sstevel@tonic-gate * the directory or the user buffer is filled.
111*0Sstevel@tonic-gate */
112*0Sstevel@tonic-gate
113*0Sstevel@tonic-gate for (j = 0; j < MAXDENTS; j++) {
114*0Sstevel@tonic-gate /*
115*0Sstevel@tonic-gate * Link our buffers together for the benefit of
116*0Sstevel@tonic-gate * XDR. We do this each time we issue the rpc call
117*0Sstevel@tonic-gate * JIC the xdr decode
118*0Sstevel@tonic-gate * routines screw up the linkage!
119*0Sstevel@tonic-gate */
120*0Sstevel@tonic-gate
121*0Sstevel@tonic-gate rdbuf.etlist[j].name = rdbuf.names[(MAXDENTS-1) - j];
122*0Sstevel@tonic-gate rdbuf.etlist[j].nextentry =
123*0Sstevel@tonic-gate (j < (MAXDENTS-1)) ? &rdbuf.etlist[j+1] : 0;
124*0Sstevel@tonic-gate }
125*0Sstevel@tonic-gate
126*0Sstevel@tonic-gate res.READDIR3res_u.resok.reply.entries = rdbuf.etlist;
127*0Sstevel@tonic-gate /*
128*0Sstevel@tonic-gate * Cannot give the whole buffer unless every name is
129*0Sstevel@tonic-gate * 256 bytes! Assume the worst case of all 1 byte names.
130*0Sstevel@tonic-gate * This results in MINSIZ bytes/name in the xdr stream.
131*0Sstevel@tonic-gate */
132*0Sstevel@tonic-gate rda.count = sizeof (res) + MAXDENTS*MINSIZ;
133*0Sstevel@tonic-gate bzero((caddr_t)rdbuf.names, sizeof (rdbuf.names));
134*0Sstevel@tonic-gate
135*0Sstevel@tonic-gate status = CLNT_CALL(root_CLIENT, NFSPROC3_READDIR,
136*0Sstevel@tonic-gate xdr_READDIR3args, (caddr_t)&rda,
137*0Sstevel@tonic-gate xdr_READDIR3res, (caddr_t)&res, zero_timeout);
138*0Sstevel@tonic-gate
139*0Sstevel@tonic-gate if (status != RPC_SUCCESS) {
140*0Sstevel@tonic-gate dprintf("nfs3_getdents: RPC error\n");
141*0Sstevel@tonic-gate return (-1);
142*0Sstevel@tonic-gate }
143*0Sstevel@tonic-gate if (res.status != NFS3_OK) {
144*0Sstevel@tonic-gate /*
145*0Sstevel@tonic-gate * The most common failure here would be trying to
146*0Sstevel@tonic-gate * issue a getdents call on a non-directory!
147*0Sstevel@tonic-gate */
148*0Sstevel@tonic-gate
149*0Sstevel@tonic-gate nfs3_error(res.status);
150*0Sstevel@tonic-gate return (-1);
151*0Sstevel@tonic-gate }
152*0Sstevel@tonic-gate
153*0Sstevel@tonic-gate for (ep = rdbuf.etlist; ep; ep = ep->nextentry) {
154*0Sstevel@tonic-gate /*
155*0Sstevel@tonic-gate * Step thru all entries returned by NFS, converting
156*0Sstevel@tonic-gate * to the cannonical form and copying out to the
157*0Sstevel@tonic-gate * user's buffer.
158*0Sstevel@tonic-gate */
159*0Sstevel@tonic-gate
160*0Sstevel@tonic-gate int n;
161*0Sstevel@tonic-gate
162*0Sstevel@tonic-gate /*
163*0Sstevel@tonic-gate * catch the case user called at EOF
164*0Sstevel@tonic-gate */
165*0Sstevel@tonic-gate if ((n = strlen(ep->name)) == 0)
166*0Sstevel@tonic-gate return (cnt);
167*0Sstevel@tonic-gate
168*0Sstevel@tonic-gate n = BDIRENT_RECLEN(n);
169*0Sstevel@tonic-gate
170*0Sstevel@tonic-gate if (n > size)
171*0Sstevel@tonic-gate return (cnt);
172*0Sstevel@tonic-gate size -= n;
173*0Sstevel@tonic-gate
174*0Sstevel@tonic-gate (void) strcpy(dep->d_name, ep->name);
175*0Sstevel@tonic-gate dep->d_ino = ep->fileid;
176*0Sstevel@tonic-gate dep->d_off = (off_t)ep->cookie;
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 rda.cookie = ep->cookie;
181*0Sstevel@tonic-gate nfp->cookie.cookie3 = ep->cookie;
182*0Sstevel@tonic-gate cnt++;
183*0Sstevel@tonic-gate }
184*0Sstevel@tonic-gate }
185*0Sstevel@tonic-gate
186*0Sstevel@tonic-gate return (cnt);
187*0Sstevel@tonic-gate }
188