Bug Summary

File:nfs/nfs_boot.c
Warning:line 165, column 7
Although the value stored to 'error' is used in the enclosing expression, the value is never actually read from 'error'

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name nfs_boot.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -ffreestanding -mcmodel=kernel -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -target-feature -sse2 -target-feature -sse -target-feature -3dnow -target-feature -mmx -target-feature +save-args -disable-red-zone -no-implicit-float -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -nostdsysteminc -nobuiltininc -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/sys -I /usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -I /usr/src/sys/arch -I /usr/src/sys/dev/pci/drm/include -I /usr/src/sys/dev/pci/drm/include/uapi -I /usr/src/sys/dev/pci/drm/amd/include/asic_reg -I /usr/src/sys/dev/pci/drm/amd/include -I /usr/src/sys/dev/pci/drm/amd/amdgpu -I /usr/src/sys/dev/pci/drm/amd/display -I /usr/src/sys/dev/pci/drm/amd/display/include -I /usr/src/sys/dev/pci/drm/amd/display/dc -I /usr/src/sys/dev/pci/drm/amd/display/amdgpu_dm -I /usr/src/sys/dev/pci/drm/amd/pm/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu11 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu12 -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/hwmgr -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/smumgr -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc/hw -I /usr/src/sys/dev/pci/drm/amd/display/dc/clk_mgr -I /usr/src/sys/dev/pci/drm/amd/display/modules/inc -I /usr/src/sys/dev/pci/drm/amd/display/modules/hdcp -I /usr/src/sys/dev/pci/drm/amd/display/dmub/inc -I /usr/src/sys/dev/pci/drm/i915 -D DDB -D DIAGNOSTIC -D KTRACE -D ACCOUNTING -D KMEMSTATS -D PTRACE -D POOL_DEBUG -D CRYPTO -D SYSVMSG -D SYSVSEM -D SYSVSHM -D UVM_SWAP_ENCRYPT -D FFS -D FFS2 -D FFS_SOFTUPDATES -D UFS_DIRHASH -D QUOTA -D EXT2FS -D MFS -D NFSCLIENT -D NFSSERVER -D CD9660 -D UDF -D MSDOSFS -D FIFO -D FUSE -D SOCKET_SPLICE -D TCP_ECN -D TCP_SIGNATURE -D INET6 -D IPSEC -D PPP_BSDCOMP -D PPP_DEFLATE -D PIPEX -D MROUTING -D MPLS -D BOOT_CONFIG -D USER_PCICONF -D APERTURE -D MTRR -D NTFS -D HIBERNATE -D PCIVERBOSE -D USBVERBOSE -D WSDISPLAY_COMPAT_USL -D WSDISPLAY_COMPAT_RAWKBD -D WSDISPLAY_DEFAULTSCREENS=6 -D X86EMU -D ONEWIREVERBOSE -D MULTIPROCESSOR -D MAXUSERS=80 -D _KERNEL -D CONFIG_DRM_AMD_DC_DCN3_0 -O2 -Wno-pointer-sign -Wno-address-of-packed-member -Wno-constant-conversion -Wno-unused-but-set-variable -Wno-gnu-folding-constant -fdebug-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /usr/obj/sys/arch/amd64/compile/GENERIC.MP/scan-build/2022-01-12-131800-47421-1 -x c /usr/src/sys/nfs/nfs_boot.c
1/* $OpenBSD: nfs_boot.c,v 1.47 2021/01/19 19:35:59 mvs Exp $ */
2/* $NetBSD: nfs_boot.c,v 1.26 1996/05/07 02:51:25 thorpej Exp $ */
3
4/*
5 * Copyright (c) 1995 Adam Glass, Gordon Ross
6 * All rights reserved.
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 * 3. The name of the authors may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/conf.h>
35#include <sys/ioctl.h>
36#include <sys/mount.h>
37#include <sys/mbuf.h>
38#include <sys/reboot.h>
39#include <sys/socket.h>
40#include <sys/socketvar.h>
41#include <sys/queue.h>
42
43#include <net/if.h>
44#include <net/if_var.h>
45
46#include <netinet/in.h>
47#include <netinet/in_var.h>
48#include <netinet/if_ether.h>
49
50#include <nfs/rpcv2.h>
51#include <nfs/nfsproto.h>
52#include <nfs/nfs.h>
53#include <nfs/nfsdiskless.h>
54#include <nfs/krpc.h>
55#include <nfs/xdr_subs.h>
56#include <nfs/nfs_var.h>
57
58#include "ether.h"
59
60#if !defined(NFSCLIENT1) || (NETHER1 == 0 && NFDDI == 0)
61
62int
63nfs_boot_init(struct nfs_diskless *nd, struct proc *procp)
64{
65 panic("nfs_boot_init: NFSCLIENT not enabled in kernel");
66}
67
68int
69nfs_boot_getfh(struct sockaddr_in *bpsin, char *key,
70 struct nfs_dlmount *ndmntp, int retries)
71{
72 /* can not get here */
73 return (EOPNOTSUPP45);
74}
75
76#else
77
78/*
79 * Support for NFS diskless booting, specifically getting information
80 * about where to boot from, what pathnames, etc.
81 *
82 * This implementation uses RARP and the bootparam RPC.
83 * We are forced to implement RPC anyway (to get file handles)
84 * so we might as well take advantage of it for bootparam too.
85 *
86 * The diskless boot sequence goes as follows:
87 * (1) Use RARP to get our interface address
88 * (2) Use RPC/bootparam/whoami to get our hostname,
89 * our IP address, and the server's IP address.
90 * (3) Use RPC/bootparam/getfile to get the root path
91 * (4) Use RPC/mountd to get the root file handle
92 * (5) Use RPC/bootparam/getfile to get the swap path
93 * (6) Use RPC/mountd to get the swap file handle
94 *
95 * (This happens to be the way Sun does it too.)
96 */
97
98/* bootparam RPC */
99static int bp_whoami(struct sockaddr_in *bpsin,
100 struct in_addr *my_ip, struct in_addr *gw_ip);
101static int bp_getfile(struct sockaddr_in *bpsin, char *key,
102 struct sockaddr_in *mdsin, char *servname, char *path, int retries);
103
104/* mountd RPC */
105static int md_mount(struct sockaddr_in *mdsin, char *path,
106 struct nfs_args *argp);
107
108char *nfsbootdevname;
109
110/*
111 * Called with an empty nfs_diskless struct to be filled in.
112 */
113int
114nfs_boot_init(struct nfs_diskless *nd, struct proc *procp)
115{
116 struct ifreq ireq;
117 struct in_aliasreq ifra;
118 struct in_addr my_ip, gw_ip;
119 struct sockaddr_in bp_sin;
120 struct sockaddr_in *sin;
121 struct ifnet *ifp;
122 struct socket *so;
123 struct ifaddr *ifa;
124 char addr[INET_ADDRSTRLEN16];
125 int error;
126
127 /*
128 * Find an interface, rarp for its ip address, stuff it, the
129 * implied broadcast addr, and netmask into a nfs_diskless struct.
130 *
131 * This was moved here from nfs_vfsops.c because this procedure
132 * would be quite different if someone decides to write (i.e.) a
133 * BOOTP version of this file (might not use RARP, etc.)
134 */
135
136 /*
137 * Find a network interface.
138 */
139 if (nfsbootdevname == NULL((void *)0) || (ifp = if_unit(nfsbootdevname)) == NULL((void *)0))
140 panic("nfs_boot: no suitable interface");
141
142 bcopy(ifp->if_xname, ireq.ifr_name, IFNAMSIZ16);
143 printf("nfs_boot: using interface %s, with revarp & bootparams\n",
144 ireq.ifr_name);
145
146 /*
147 * Bring up the interface.
148 *
149 * Get the old interface flags and or IFF_UP into them; if
150 * IFF_UP set blindly, interface selection can be clobbered.
151 */
152 if ((error = socreate(AF_INET2, &so, SOCK_DGRAM2, 0)) != 0)
153 panic("nfs_boot: socreate, error=%d", error);
154 error = ifioctl(so, SIOCGIFFLAGS(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof
(struct ifreq) & 0x1fff) << 16) | ((('i')) <<
8) | ((17)))
, (caddr_t)&ireq, procp);
155 if (error)
156 panic("nfs_boot: GIFFLAGS, error=%d", error);
157 ireq.ifr_flagsifr_ifru.ifru_flags |= IFF_UP0x1;
158 error = ifioctl(so, SIOCSIFFLAGS((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((16)))
, (caddr_t)&ireq, procp);
159 if (error)
160 panic("nfs_boot: SIFFLAGS, error=%d", error);
161
162 /*
163 * Do RARP for the interface address.
164 */
165 if ((error = revarpwhoami(&my_ip, ifp)) != 0)
Although the value stored to 'error' is used in the enclosing expression, the value is never actually read from 'error'
166 panic("reverse arp not answered by rarpd(8) or dhcpd(8)");
167 inet_ntop(AF_INET2, &my_ip, addr, sizeof(addr));
168 printf("nfs_boot: client_addr=%s\n", addr);
169
170 /*
171 * Do enough of ifconfig(8) so that the chosen interface
172 * can talk to the servers. (just set the address)
173 */
174 memset(&ifra, 0, sizeof(ifra))__builtin_memset((&ifra), (0), (sizeof(ifra)));
175 bcopy(ifp->if_xname, ifra.ifra_name, sizeof(ifra.ifra_name));
176
177 sin = &ifra.ifra_addrifra_ifrau.ifrau_addr;
178 sin->sin_len = sizeof(*sin);
179 sin->sin_family = AF_INET2;
180 sin->sin_addr.s_addr = my_ip.s_addr;
181 error = ifioctl(so, SIOCAIFADDR((unsigned long)0x80000000 | ((sizeof(struct ifaliasreq) &
0x1fff) << 16) | ((('i')) << 8) | ((26)))
, (caddr_t)&ifra, procp);
182 if (error)
183 panic("nfs_boot: set if addr, error=%d", error);
184
185 soclose(so, 0);
186
187 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)for((ifa) = ((&ifp->if_addrlist)->tqh_first); (ifa)
!= ((void *)0); (ifa) = ((ifa)->ifa_list.tqe_next))
{
188 if (ifa->ifa_addr->sa_family == AF_INET2)
189 break;
190 }
191 if (ifa == NULL((void *)0))
192 panic("nfs_boot: address not configured on %s", ifp->if_xname);
193 if_put(ifp);
194
195 /*
196 * Get client name and gateway address.
197 * RPC: bootparam/whoami
198 * The server address returned by the WHOAMI call
199 * is used for all subsequent bootparam RPCs.
200 */
201 memset(&bp_sin, 0, sizeof(bp_sin))__builtin_memset((&bp_sin), (0), (sizeof(bp_sin)));
202 bp_sin.sin_len = sizeof(bp_sin);
203 bp_sin.sin_family = AF_INET2;
204 bp_sin.sin_addr.s_addr = ifatoia(ifa)->ia_broadaddria_dstaddr.sin_addr.s_addr;
205 hostnamelen = MAXHOSTNAMELEN256;
206
207 /* this returns gateway IP address */
208 error = bp_whoami(&bp_sin, &my_ip, &gw_ip);
209 if (error)
210 panic("nfs_boot: bootparam whoami, error=%d", error);
211 inet_ntop(AF_INET2, &bp_sin.sin_addr, addr, sizeof(addr));
212 printf("nfs_boot: server_addr=%s hostname=%s\n", addr, hostname);
213
214 bcopy(&bp_sin, &nd->nd_boot, sizeof(bp_sin));
215
216 return (0);
217}
218
219/*
220 * bpsin: bootparam server
221 * key: root or swap
222 * ndmntp: output
223 */
224int
225nfs_boot_getfh(struct sockaddr_in *bpsin, char *key,
226 struct nfs_dlmount *ndmntp, int retries)
227{
228 struct nfs_args *args;
229 char pathname[MAXPATHLEN1024];
230 char *sp, *dp, *endp;
231 struct sockaddr_in *sin;
232 int error;
233
234 args = &ndmntp->ndm_args;
235
236 /* Initialize mount args. */
237 memset(args, 0, sizeof(*args))__builtin_memset((args), (0), (sizeof(*args)));
238 args->addr = sintosa(&ndmntp->ndm_saddr);
239 args->addrlen = args->addr->sa_len;
240 args->sotype = SOCK_DGRAM2;
241 args->fh = ndmntp->ndm_fh;
242 args->hostname = ndmntp->ndm_host;
243 args->flags = NFSMNT_NFSV30x00000200;
244#ifdef NFS_BOOT_OPTIONS
245 args->flags |= NFS_BOOT_OPTIONS;
246#endif
247#ifdef NFS_BOOT_RWSIZE
248 /*
249 * Reduce rsize,wsize for interfaces that consistently
250 * drop fragments of long UDP messages. (i.e. wd8003).
251 * You can always change these later via remount.
252 */
253 args->flags |= NFSMNT_WSIZE0x00000002 | NFSMNT_RSIZE0x00000004;
254 args->wsize = NFS_BOOT_RWSIZE;
255 args->rsize = NFS_BOOT_RWSIZE;
256#endif
257
258 sin = &ndmntp->ndm_saddr;
259
260 /*
261 * Get server:pathname for "key" (root or swap)
262 * using RPC to bootparam/getfile
263 */
264 error = bp_getfile(bpsin, key, sin, ndmntp->ndm_host, pathname,
265 retries);
266 if (error) {
267 printf("nfs_boot: bootparam get %s: %d\n", key, error);
268 return (error);
269 }
270
271 /*
272 * Get file handle for "key" (root or swap)
273 * using RPC to mountd/mount
274 */
275 error = md_mount(sin, pathname, args);
276 if (error) {
277 printf("nfs_boot: mountd %s, error=%d\n", key, error);
278 return (error);
279 }
280
281 /* Set port number for NFS use. */
282 /* XXX: NFS port is always 2049, right? */
283 error = krpc_portmap(sin, NFS_PROG100003,
284 (args->flags & NFSMNT_NFSV30x00000200) ? NFS_VER33 : NFS_VER22,
285 &sin->sin_port);
286 if (error) {
287 printf("nfs_boot: portmap NFS, error=%d\n", error);
288 return (error);
289 }
290
291 /* Construct remote path (for getmntinfo(3)) */
292 dp = ndmntp->ndm_host;
293 endp = dp + MNAMELEN90 - 1;
294 dp += strlen(dp);
295 *dp++ = ':';
296 for (sp = pathname; *sp && dp < endp;)
297 *dp++ = *sp++;
298 *dp = '\0';
299
300 return (0);
301}
302
303
304/*
305 * RPC: bootparam/whoami
306 * Given client IP address, get:
307 * client name (hostname)
308 * domain name (domainname)
309 * gateway address
310 *
311 * The hostname and domainname are set here for convenience.
312 *
313 * Note - bpsin is initialized to the broadcast address,
314 * and will be replaced with the bootparam server address
315 * after this call is complete. Have to use PMAP_PROC_CALL
316 * to make sure we get responses only from a servers that
317 * know about us (don't want to broadcast a getport call).
318 */
319static int
320bp_whoami(struct sockaddr_in *bpsin, struct in_addr *my_ip,
321 struct in_addr *gw_ip)
322{
323 /* RPC structures for PMAPPROC_CALLIT */
324 struct whoami_call {
325 u_int32_t call_prog;
326 u_int32_t call_vers;
327 u_int32_t call_proc;
328 u_int32_t call_arglen;
329 } *call;
330 struct callit_reply {
331 u_int32_t port;
332 u_int32_t encap_len;
333 /* encapsulated data here */
334 } *reply;
335
336 struct mbuf *m, *from;
337 struct sockaddr_in *sin;
338 int error, msg_len;
339 int16_t port;
340
341 /*
342 * Build request message for PMAPPROC_CALLIT.
343 */
344 m = m_get(M_WAIT0x0001, MT_DATA1);
345 call = mtod(m, struct whoami_call *)((struct whoami_call *)((m)->m_hdr.mh_data));
346 m->m_lenm_hdr.mh_len = sizeof(*call);
347 call->call_prog = txdr_unsigned(BOOTPARAM_PROG)((__uint32_t)(__builtin_constant_p((int32_t)(100026)) ? (__uint32_t
)(((__uint32_t)((int32_t)(100026)) & 0xff) << 24 | (
(__uint32_t)((int32_t)(100026)) & 0xff00) << 8 | ((
__uint32_t)((int32_t)(100026)) & 0xff0000) >> 8 | (
(__uint32_t)((int32_t)(100026)) & 0xff000000) >> 24
) : __swap32md((int32_t)(100026))))
;
348 call->call_vers = txdr_unsigned(BOOTPARAM_VERS)((__uint32_t)(__builtin_constant_p((int32_t)(1)) ? (__uint32_t
)(((__uint32_t)((int32_t)(1)) & 0xff) << 24 | ((__uint32_t
)((int32_t)(1)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(1)) & 0xff0000) >> 8 | ((__uint32_t)((int32_t)(1)
) & 0xff000000) >> 24) : __swap32md((int32_t)(1))))
;
349 call->call_proc = txdr_unsigned(BOOTPARAM_WHOAMI)((__uint32_t)(__builtin_constant_p((int32_t)(1)) ? (__uint32_t
)(((__uint32_t)((int32_t)(1)) & 0xff) << 24 | ((__uint32_t
)((int32_t)(1)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(1)) & 0xff0000) >> 8 | ((__uint32_t)((int32_t)(1)
) & 0xff000000) >> 24) : __swap32md((int32_t)(1))))
;
350
351 /*
352 * append encapsulated data (client IP address)
353 */
354 m->m_nextm_hdr.mh_next = xdr_inaddr_encode(my_ip);
355 call->call_arglen = txdr_unsigned(m->m_next->m_len)((__uint32_t)(__builtin_constant_p((int32_t)(m->m_hdr.mh_next
->m_hdr.mh_len)) ? (__uint32_t)(((__uint32_t)((int32_t)(m->
m_hdr.mh_next->m_hdr.mh_len)) & 0xff) << 24 | ((
__uint32_t)((int32_t)(m->m_hdr.mh_next->m_hdr.mh_len)) &
0xff00) << 8 | ((__uint32_t)((int32_t)(m->m_hdr.mh_next
->m_hdr.mh_len)) & 0xff0000) >> 8 | ((__uint32_t
)((int32_t)(m->m_hdr.mh_next->m_hdr.mh_len)) & 0xff000000
) >> 24) : __swap32md((int32_t)(m->m_hdr.mh_next->
m_hdr.mh_len))))
;
356
357 /* RPC: portmap/callit */
358 bpsin->sin_port = htons(PMAPPORT)(__uint16_t)(__builtin_constant_p(111) ? (__uint16_t)(((__uint16_t
)(111) & 0xffU) << 8 | ((__uint16_t)(111) & 0xff00U
) >> 8) : __swap16md(111))
;
359 from = NULL((void *)0);
360 error = krpc_call(bpsin, PMAPPROG100000, PMAPVERS2,
361 PMAPPROC_CALLIT5, &m, &from, -1);
362 if (error)
363 return error;
364
365 /*
366 * Parse result message.
367 */
368 if (m->m_lenm_hdr.mh_len < sizeof(*reply)) {
369 m = m_pullup(m, sizeof(*reply));
370 if (m == NULL((void *)0))
371 goto bad;
372 }
373 reply = mtod(m, struct callit_reply *)((struct callit_reply *)((m)->m_hdr.mh_data));
374 port = fxdr_unsigned(u_int32_t, reply->port)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(reply
->port)) ? (__uint32_t)(((__uint32_t)((int32_t)(reply->
port)) & 0xff) << 24 | ((__uint32_t)((int32_t)(reply
->port)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(reply->port)) & 0xff0000) >> 8 | ((__uint32_t)
((int32_t)(reply->port)) & 0xff000000) >> 24) : __swap32md
((int32_t)(reply->port))))
;
375 msg_len = fxdr_unsigned(u_int32_t, reply->encap_len)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(reply
->encap_len)) ? (__uint32_t)(((__uint32_t)((int32_t)(reply
->encap_len)) & 0xff) << 24 | ((__uint32_t)((int32_t
)(reply->encap_len)) & 0xff00) << 8 | ((__uint32_t
)((int32_t)(reply->encap_len)) & 0xff0000) >> 8 |
((__uint32_t)((int32_t)(reply->encap_len)) & 0xff000000
) >> 24) : __swap32md((int32_t)(reply->encap_len))))
;
376 m_adj(m, sizeof(*reply));
377
378 /*
379 * Save bootparam server address
380 */
381 sin = mtod(from, struct sockaddr_in *)((struct sockaddr_in *)((from)->m_hdr.mh_data));
382 bpsin->sin_port = htons(port)(__uint16_t)(__builtin_constant_p(port) ? (__uint16_t)(((__uint16_t
)(port) & 0xffU) << 8 | ((__uint16_t)(port) & 0xff00U
) >> 8) : __swap16md(port))
;
383 bpsin->sin_addr.s_addr = sin->sin_addr.s_addr;
384
385 /* client name */
386 hostnamelen = MAXHOSTNAMELEN256-1;
387 m = xdr_string_decode(m, hostname, &hostnamelen);
388 if (m == NULL((void *)0))
389 goto bad;
390
391 /* domain name */
392 domainnamelen = MAXHOSTNAMELEN256-1;
393 m = xdr_string_decode(m, domainname, &domainnamelen);
394 if (m == NULL((void *)0))
395 goto bad;
396
397 /* gateway address */
398 m = xdr_inaddr_decode(m, gw_ip);
399 if (m == NULL((void *)0))
400 goto bad;
401
402 /* success */
403 goto out;
404
405bad:
406 printf("nfs_boot: bootparam_whoami: bad reply\n");
407 error = EBADRPC72;
408
409out:
410 m_freem(from);
411 m_freem(m);
412 return(error);
413}
414
415
416/*
417 * RPC: bootparam/getfile
418 * Given client name and file "key", get:
419 * server name
420 * server IP address
421 * server pathname
422 */
423static int
424bp_getfile(struct sockaddr_in *bpsin, char *key, struct sockaddr_in *md_sin,
425 char *serv_name, char *pathname, int retries)
426{
427 struct mbuf *m;
428 struct sockaddr_in *sin;
429 struct in_addr inaddr;
430 int error, sn_len, path_len;
431
432 /*
433 * Build request message.
434 */
435
436 /* client name (hostname) */
437 m = xdr_string_encode(hostname, hostnamelen);
438 if (m == NULL((void *)0))
439 return (ENOMEM12);
440
441 /* key name (root or swap) */
442 m->m_nextm_hdr.mh_next = xdr_string_encode(key, strlen(key));
443 if (m->m_nextm_hdr.mh_next == NULL((void *)0)) {
444 m_freem(m);
445 return (ENOMEM12);
446 }
447
448 /* RPC: bootparam/getfile */
449 error = krpc_call(bpsin, BOOTPARAM_PROG100026, BOOTPARAM_VERS1,
450 BOOTPARAM_GETFILE2, &m, NULL((void *)0), retries);
451 if (error)
452 return error;
453
454 /*
455 * Parse result message.
456 */
457
458 /* server name */
459 sn_len = MNAMELEN90-1;
460 m = xdr_string_decode(m, serv_name, &sn_len);
461 if (m == NULL((void *)0))
462 goto bad;
463
464 /* server IP address (mountd/NFS) */
465 m = xdr_inaddr_decode(m, &inaddr);
466 if (m == NULL((void *)0))
467 goto bad;
468
469 /* server pathname */
470 path_len = MAXPATHLEN1024-1;
471 m = xdr_string_decode(m, pathname, &path_len);
472 if (m == NULL((void *)0))
473 goto bad;
474
475 /* setup server socket address */
476 sin = md_sin;
477 memset(sin, 0, sizeof(*sin))__builtin_memset((sin), (0), (sizeof(*sin)));
478 sin->sin_len = sizeof(*sin);
479 sin->sin_family = AF_INET2;
480 sin->sin_addr = inaddr;
481
482 /* success */
483 goto out;
484
485bad:
486 printf("nfs_boot: bootparam_getfile: bad reply\n");
487 error = EBADRPC72;
488
489out:
490 m_freem(m);
491 return(error);
492}
493
494
495/*
496 * RPC: mountd/mount
497 * Given a server pathname, get an NFS file handle.
498 * Also, sets sin->sin_port to the NFS service port.
499 * mdsin: mountd server address
500 */
501static int
502md_mount(struct sockaddr_in *mdsin, char *path, struct nfs_args *argp)
503{
504 /* The RPC structures */
505 struct rdata {
506 u_int32_t errno;
507 union {
508 u_int8_t v2fh[NFSX_V2FH32];
509 struct {
510 u_int32_t fhlen;
511 u_int8_t fh[1];
512 } v3fh;
513 } fh;
514 } *rdata;
515 struct mbuf *m;
516 u_int8_t *fh;
517 int minlen, error;
518 int mntver;
519
520 mntver = (argp->flags & NFSMNT_NFSV30x00000200) ? 3 : 2;
521 do {
522 error = krpc_portmap(mdsin, RPCPROG_MNT100005, mntver,
523 &mdsin->sin_port);
524 if (error)
525 continue;
526
527 m = xdr_string_encode(path, strlen(path));
528 if (m == NULL((void *)0))
529 return ENOMEM12;
530
531 /* Do RPC to mountd. */
532 error = krpc_call(mdsin, RPCPROG_MNT100005, mntver,
533 RPCMNT_MOUNT1, &m, NULL((void *)0), -1);
534
535 if (error != EPROGMISMATCH75)
536 break;
537 /* Try lower version of mountd. */
538 } while (--mntver >= 1);
539 if (error)
540 return error; /* message already freed */
541
542 if (mntver != 3)
543 argp->flags &= ~NFSMNT_NFSV30x00000200;
544
545 /* The reply might have only the errno. */
546 if (m->m_lenm_hdr.mh_len < 4)
547 goto bad;
548 /* Have at least errno, so check that. */
549 rdata = mtod(m, struct rdata *)((struct rdata *)((m)->m_hdr.mh_data));
550 error = fxdr_unsigned(u_int32_t, rdata->errno)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(rdata
->errno)) ? (__uint32_t)(((__uint32_t)((int32_t)(rdata->
errno)) & 0xff) << 24 | ((__uint32_t)((int32_t)(rdata
->errno)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(rdata->errno)) & 0xff0000) >> 8 | ((__uint32_t
)((int32_t)(rdata->errno)) & 0xff000000) >> 24) :
__swap32md((int32_t)(rdata->errno))))
;
551 if (error)
552 goto out;
553
554 /* Have errno==0, so the fh must be there. */
555 if (mntver == 3) {
556 argp->fhsize = fxdr_unsigned(u_int32_t, rdata->fh.v3fh.fhlen)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(rdata
->fh.v3fh.fhlen)) ? (__uint32_t)(((__uint32_t)((int32_t)(rdata
->fh.v3fh.fhlen)) & 0xff) << 24 | ((__uint32_t)(
(int32_t)(rdata->fh.v3fh.fhlen)) & 0xff00) << 8 |
((__uint32_t)((int32_t)(rdata->fh.v3fh.fhlen)) & 0xff0000
) >> 8 | ((__uint32_t)((int32_t)(rdata->fh.v3fh.fhlen
)) & 0xff000000) >> 24) : __swap32md((int32_t)(rdata
->fh.v3fh.fhlen))))
;
557 if (argp->fhsize > NFSX_V3FHMAX64)
558 goto bad;
559 minlen = 2 * sizeof(u_int32_t) + argp->fhsize;
560 } else {
561 argp->fhsize = NFSX_V2FH32;
562 minlen = sizeof(u_int32_t) + argp->fhsize;
563 }
564
565 if (m->m_lenm_hdr.mh_len < minlen) {
566 m = m_pullup(m, minlen);
567 if (m == NULL((void *)0))
568 return (EBADRPC72);
569 rdata = mtod(m, struct rdata *)((struct rdata *)((m)->m_hdr.mh_data));
570 }
571
572 fh = (mntver == 3) ? rdata->fh.v3fh.fh : rdata->fh.v2fh;
573 bcopy(fh, argp->fh, argp->fhsize);
574
575 goto out;
576
577bad:
578 error = EBADRPC72;
579
580out:
581 m_freem(m);
582 return error;
583}
584
585#endif /* ifdef NFSCLIENT */