Bug Summary

File:nfs/nfs_vfsops.c
Warning:line 292, column 9
Assigned value is garbage or undefined

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_vfsops.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_vfsops.c
1/* $OpenBSD: nfs_vfsops.c,v 1.126 2021/01/02 02:41:42 cheloha Exp $ */
2/* $NetBSD: nfs_vfsops.c,v 1.46.4.1 1996/05/25 22:40:35 fvdl Exp $ */
3
4/*
5 * Copyright (c) 1989, 1993, 1995
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Rick Macklem at The University of Guelph.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
36 */
37
38#include <sys/param.h>
39#include <sys/conf.h>
40#include <sys/ioctl.h>
41#include <sys/signal.h>
42#include <sys/proc.h>
43#include <sys/namei.h>
44#include <sys/vnode.h>
45#include <sys/lock.h>
46#include <sys/kernel.h>
47#include <sys/mount.h>
48#include <sys/swap.h>
49#include <sys/buf.h>
50#include <sys/mbuf.h>
51#include <sys/dirent.h>
52#include <sys/socket.h>
53#include <sys/socketvar.h>
54#include <sys/systm.h>
55#include <sys/sysctl.h>
56#include <sys/queue.h>
57
58#include <netinet/in.h>
59
60#include <nfs/rpcv2.h>
61#include <nfs/nfsproto.h>
62#include <nfs/nfsnode.h>
63#include <nfs/nfs.h>
64#include <nfs/nfsmount.h>
65#include <nfs/xdr_subs.h>
66#include <nfs/nfsm_subs.h>
67#include <nfs/nfsdiskless.h>
68#include <nfs/nfs_var.h>
69
70extern struct nfsstats nfsstats;
71extern int nfs_ticks;
72extern u_int32_t nfs_procids[NFS_NPROCS23];
73
74int nfs_sysctl(int *, u_int, void *, size_t *, void *, size_t,
75 struct proc *);
76int nfs_checkexp(struct mount *, struct mbuf *, int *, struct ucred **);
77struct mount *nfs_mount_diskless(struct nfs_dlmount *, char *, int,
78 struct vnode **, struct proc *p);
79int mountnfs(struct nfs_args *, struct mount *, struct mbuf *,
80 const char *, char *, struct vnode **, struct proc *p);
81int nfs_quotactl(struct mount *, int, uid_t, caddr_t, struct proc *);
82int nfs_root(struct mount *, struct vnode **);
83int nfs_start(struct mount *, int, struct proc *);
84int nfs_statfs(struct mount *, struct statfs *, struct proc *);
85int nfs_sync(struct mount *, int, int, struct ucred *, struct proc *);
86int nfs_unmount(struct mount *, int, struct proc *);
87void nfs_reaper(void *);
88int nfs_vget(struct mount *, ino_t, struct vnode **);
89int nfs_vptofh(struct vnode *, struct fid *);
90int nfs_mountroot(void);
91void nfs_decode_args(struct nfsmount *, struct nfs_args *,
92 struct nfs_args *);
93int nfs_fhtovp(struct mount *, struct fid *, struct vnode **);
94
95/*
96 * nfs vfs operations.
97 */
98const struct vfsops nfs_vfsops = {
99 .vfs_mount = nfs_mount,
100 .vfs_start = nfs_start,
101 .vfs_unmount = nfs_unmount,
102 .vfs_root = nfs_root,
103 .vfs_quotactl = nfs_quotactl,
104 .vfs_statfs = nfs_statfs,
105 .vfs_sync = nfs_sync,
106 .vfs_vget = nfs_vget,
107 .vfs_fhtovp = nfs_fhtovp,
108 .vfs_vptofh = nfs_vptofh,
109 .vfs_init = nfs_vfs_init,
110 .vfs_sysctl = nfs_sysctl,
111 .vfs_checkexp = nfs_checkexp,
112};
113
114/*
115 * nfs statfs call
116 */
117int
118nfs_statfs(struct mount *mp, struct statfs *sbp, struct proc *p)
119{
120 struct vnode *vp;
121 struct nfs_statfs *sfp = NULL((void *)0);
122 struct nfsm_info info;
123 u_int32_t *tl;
124 int32_t t1;
125 caddr_t cp2;
126 struct nfsmount *nmp = VFSTONFS(mp)((struct nfsmount *)((mp)->mnt_data));
127 int error = 0, retattr;
128 struct ucred *cred;
129 u_quad_t tquad;
130
131 info.nmi_v3 = (nmp->nm_flag & NFSMNT_NFSV30x00000200);
132
133 error = nfs_root(mp, &vp);
134 if (error)
135 return (error);
136 cred = crget();
137 cred->cr_ngroups = 0;
138 if (info.nmi_v3 && (nmp->nm_flag & NFSMNT_GOTFSINFO0x00100000) == 0)
139 (void)nfs_fsinfo(nmp, vp, cred, p);
140 nfsstats.rpccnt[NFSPROC_FSSTAT18]++;
141 info.nmi_mb = info.nmi_mreq = nfsm_reqhead(NFSX_FH(info.nmi_v3)((info.nmi_v3) ? (64 + 4) : 32));
142 nfsm_fhtom(&info, vp, info.nmi_v3);
143
144 info.nmi_procp = p;
145 info.nmi_cred = cred;
146 error = nfs_request(vp, NFSPROC_FSSTAT18, &info);
147 if (info.nmi_v3)
148 nfsm_postop_attr(vp, retattr){ if (info.nmi_mrep != ((void *)0)) { struct vnode *ttvp = (vp
); { t1 = ((caddr_t)((info.nmi_md)->m_hdr.mh_data)) + info
.nmi_md->m_hdr.mh_len - info.nmi_dpos; if (t1 >= (4)) {
(tl) = (u_int32_t *)(info.nmi_dpos); info.nmi_dpos += (4); }
else if ((t1 = nfsm_disct(&info.nmi_md, &info.nmi_dpos
, (4), t1, &cp2)) != 0) { error = t1; m_freem(info.nmi_mrep
); goto nfsmout; } else { (tl) = (u_int32_t *)cp2; } }; if ((
(retattr) = ((int)(__uint32_t)(__builtin_constant_p((int32_t)
(*tl)) ? (__uint32_t)(((__uint32_t)((int32_t)(*tl)) & 0xff
) << 24 | ((__uint32_t)((int32_t)(*tl)) & 0xff00) <<
8 | ((__uint32_t)((int32_t)(*tl)) & 0xff0000) >> 8
| ((__uint32_t)((int32_t)(*tl)) & 0xff000000) >> 24
) : __swap32md((int32_t)(*tl))))) != 0) { if ((t1 = nfs_loadattrcache
(&ttvp, &info.nmi_md, &info.nmi_dpos, ((void *)0)
)) != 0) { error = t1; (retattr) = 0; m_freem(info.nmi_mrep);
goto nfsmout; } (vp) = ttvp; } } };
149 if (error) {
150 m_freem(info.nmi_mrep);
151 goto nfsmout;
152 }
153
154 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(info.nmi_v3)){ t1 = ((caddr_t)((info.nmi_md)->m_hdr.mh_data)) + info.nmi_md
->m_hdr.mh_len - info.nmi_dpos; if (t1 >= (((info.nmi_v3
) ? 52 : 20))) { (sfp) = (struct nfs_statfs *)(info.nmi_dpos)
; info.nmi_dpos += (((info.nmi_v3) ? 52 : 20)); } else if ((t1
= nfsm_disct(&info.nmi_md, &info.nmi_dpos, (((info.nmi_v3
) ? 52 : 20)), t1, &cp2)) != 0) { error = t1; m_freem(info
.nmi_mrep); goto nfsmout; } else { (sfp) = (struct nfs_statfs
*)cp2; } };
155 sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize);
156 if (info.nmi_v3) {
157 sbp->f_bsize = NFS_FABLKSIZE512;
158 tquad = fxdr_hyper(&sfp->sf_tbytes)((((u_quad_t)(__uint32_t)(__builtin_constant_p(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes))[0]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes
))[0]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes))[0]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_tbytes))[0]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes
))[0]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes))[0]))) <<
32) | (u_quad_t)((__uint32_t)(__builtin_constant_p(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes))[1]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes
))[1]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes))[1]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_tbytes))[1]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes
))[1]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tbytes))[1]))));
159 sbp->f_blocks = tquad / (u_quad_t)NFS_FABLKSIZE512;
160 tquad = fxdr_hyper(&sfp->sf_fbytes)((((u_quad_t)(__uint32_t)(__builtin_constant_p(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes))[0]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes
))[0]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes))[0]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_fbytes))[0]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes
))[0]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes))[0]))) <<
32) | (u_quad_t)((__uint32_t)(__builtin_constant_p(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes))[1]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes
))[1]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes))[1]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_fbytes))[1]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes
))[1]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_fbytes))[1]))));
161 sbp->f_bfree = tquad / (u_quad_t)NFS_FABLKSIZE512;
162 tquad = fxdr_hyper(&sfp->sf_abytes)((((u_quad_t)(__uint32_t)(__builtin_constant_p(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes))[0]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes
))[0]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes))[0]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_abytes))[0]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes
))[0]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes))[0]))) <<
32) | (u_quad_t)((__uint32_t)(__builtin_constant_p(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes))[1]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes
))[1]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes))[1]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_abytes))[1]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes
))[1]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_abytes))[1]))));
163 sbp->f_bavail = (quad_t)tquad / (quad_t)NFS_FABLKSIZE512;
164
165 tquad = fxdr_hyper(&sfp->sf_tfiles)((((u_quad_t)(__uint32_t)(__builtin_constant_p(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles))[0]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles
))[0]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles))[0]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_tfiles))[0]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles
))[0]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles))[0]))) <<
32) | (u_quad_t)((__uint32_t)(__builtin_constant_p(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles))[1]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles
))[1]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles))[1]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_tfiles))[1]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles
))[1]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_tfiles))[1]))));
166 sbp->f_files = tquad;
167 tquad = fxdr_hyper(&sfp->sf_ffiles)((((u_quad_t)(__uint32_t)(__builtin_constant_p(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles))[0]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles
))[0]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles))[0]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_ffiles))[0]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles
))[0]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles))[0]))) <<
32) | (u_quad_t)((__uint32_t)(__builtin_constant_p(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles))[1]) ? (__uint32_t
)(((__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles
))[1]) & 0xff) << 24 | ((__uint32_t)(((u_int32_t *)
(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles))[1]) & 0xff00
) << 8 | ((__uint32_t)(((u_int32_t *)(&sfp->sf_un
.sf_nfsv3.nfsv3sf_ffiles))[1]) & 0xff0000) >> 8 | (
(__uint32_t)(((u_int32_t *)(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles
))[1]) & 0xff000000) >> 24) : __swap32md(((u_int32_t
*)(&sfp->sf_un.sf_nfsv3.nfsv3sf_ffiles))[1]))));
168 sbp->f_ffree = tquad;
169 sbp->f_favail = tquad;
170 } else {
171 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize)((int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_bsize)) ? (__uint32_t)(((__uint32_t)((
int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_bsize)) & 0xff) <<
24 | ((__uint32_t)((int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_bsize
)) & 0xff00) << 8 | ((__uint32_t)((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_bsize)) & 0xff0000) >> 8 | (
(__uint32_t)((int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_bsize))
& 0xff000000) >> 24) : __swap32md((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_bsize))));
172 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks)((int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_blocks)) ? (__uint32_t)(((__uint32_t)(
(int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_blocks)) & 0xff)
<< 24 | ((__uint32_t)((int32_t)(sfp->sf_un.sf_nfsv2
.nfsv2sf_blocks)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(sfp->sf_un.sf_nfsv2.nfsv2sf_blocks)) & 0xff0000) >>
8 | ((__uint32_t)((int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_blocks
)) & 0xff000000) >> 24) : __swap32md((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_blocks))));
173 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree)((int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_bfree)) ? (__uint32_t)(((__uint32_t)((
int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_bfree)) & 0xff) <<
24 | ((__uint32_t)((int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_bfree
)) & 0xff00) << 8 | ((__uint32_t)((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_bfree)) & 0xff0000) >> 8 | (
(__uint32_t)((int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_bfree))
& 0xff000000) >> 24) : __swap32md((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_bfree))));
174 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail)((int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_bavail)) ? (__uint32_t)(((__uint32_t)(
(int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_bavail)) & 0xff)
<< 24 | ((__uint32_t)((int32_t)(sfp->sf_un.sf_nfsv2
.nfsv2sf_bavail)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(sfp->sf_un.sf_nfsv2.nfsv2sf_bavail)) & 0xff0000) >>
8 | ((__uint32_t)((int32_t)(sfp->sf_un.sf_nfsv2.nfsv2sf_bavail
)) & 0xff000000) >> 24) : __swap32md((int32_t)(sfp->
sf_un.sf_nfsv2.nfsv2sf_bavail))));
175 sbp->f_files = 0;
176 sbp->f_ffree = 0;
177 sbp->f_favail = 0;
178 }
179 copy_statfs_info(sbp, mp);
180 m_freem(info.nmi_mrep);
181nfsmout:
182 vput(vp);
183 crfree(cred);
184 return (error);
185}
186
187/*
188 * nfs version 3 fsinfo rpc call
189 */
190int
191nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred,
192 struct proc *p)
193{
194 struct nfsv3_fsinfo *fsp;
195 struct nfsm_info info;
196 int32_t t1;
197 u_int32_t *tl, pref, max;
198 caddr_t cp2;
199 int error = 0, retattr;
200
201 nfsstats.rpccnt[NFSPROC_FSINFO19]++;
202 info.nmi_mb = info.nmi_mreq = nfsm_reqhead(NFSX_FH(1)((1) ? (64 + 4) : 32));
203 nfsm_fhtom(&info, vp, 1);
204
205 info.nmi_procp = p;
206 info.nmi_cred = cred;
207 error = nfs_request(vp, NFSPROC_FSINFO19, &info);
208
209 nfsm_postop_attr(vp, retattr){ if (info.nmi_mrep != ((void *)0)) { struct vnode *ttvp = (vp
); { t1 = ((caddr_t)((info.nmi_md)->m_hdr.mh_data)) + info
.nmi_md->m_hdr.mh_len - info.nmi_dpos; if (t1 >= (4)) {
(tl) = (u_int32_t *)(info.nmi_dpos); info.nmi_dpos += (4); }
else if ((t1 = nfsm_disct(&info.nmi_md, &info.nmi_dpos
, (4), t1, &cp2)) != 0) { error = t1; m_freem(info.nmi_mrep
); goto nfsmout; } else { (tl) = (u_int32_t *)cp2; } }; if ((
(retattr) = ((int)(__uint32_t)(__builtin_constant_p((int32_t)
(*tl)) ? (__uint32_t)(((__uint32_t)((int32_t)(*tl)) & 0xff
) << 24 | ((__uint32_t)((int32_t)(*tl)) & 0xff00) <<
8 | ((__uint32_t)((int32_t)(*tl)) & 0xff0000) >> 8
| ((__uint32_t)((int32_t)(*tl)) & 0xff000000) >> 24
) : __swap32md((int32_t)(*tl))))) != 0) { if ((t1 = nfs_loadattrcache
(&ttvp, &info.nmi_md, &info.nmi_dpos, ((void *)0)
)) != 0) { error = t1; (retattr) = 0; m_freem(info.nmi_mrep);
goto nfsmout; } (vp) = ttvp; } } };
210 if (error) {
211 m_freem(info.nmi_mrep);
212 goto nfsmout;
213 }
214
215 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO){ t1 = ((caddr_t)((info.nmi_md)->m_hdr.mh_data)) + info.nmi_md
->m_hdr.mh_len - info.nmi_dpos; if (t1 >= (48)) { (fsp)
= (struct nfsv3_fsinfo *)(info.nmi_dpos); info.nmi_dpos += (
48); } else if ((t1 = nfsm_disct(&info.nmi_md, &info.
nmi_dpos, (48), t1, &cp2)) != 0) { error = t1; m_freem(info
.nmi_mrep); goto nfsmout; } else { (fsp) = (struct nfsv3_fsinfo
*)cp2; } };
216 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(fsp->
fs_wtpref)) ? (__uint32_t)(((__uint32_t)((int32_t)(fsp->fs_wtpref
)) & 0xff) << 24 | ((__uint32_t)((int32_t)(fsp->
fs_wtpref)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(fsp->fs_wtpref)) & 0xff0000) >> 8 | ((__uint32_t
)((int32_t)(fsp->fs_wtpref)) & 0xff000000) >> 24
) : __swap32md((int32_t)(fsp->fs_wtpref))));
217 if (pref < nmp->nm_wsize)
218 nmp->nm_wsize = (pref + NFS_FABLKSIZE512 - 1) &
219 ~(NFS_FABLKSIZE512 - 1);
220 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(fsp->
fs_wtmax)) ? (__uint32_t)(((__uint32_t)((int32_t)(fsp->fs_wtmax
)) & 0xff) << 24 | ((__uint32_t)((int32_t)(fsp->
fs_wtmax)) & 0xff00) << 8 | ((__uint32_t)((int32_t)
(fsp->fs_wtmax)) & 0xff0000) >> 8 | ((__uint32_t
)((int32_t)(fsp->fs_wtmax)) & 0xff000000) >> 24)
: __swap32md((int32_t)(fsp->fs_wtmax))));
221 if (max < nmp->nm_wsize) {
222 nmp->nm_wsize = max & ~(NFS_FABLKSIZE512 - 1);
223 if (nmp->nm_wsize == 0)
224 nmp->nm_wsize = max;
225 }
226 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(fsp->
fs_rtpref)) ? (__uint32_t)(((__uint32_t)((int32_t)(fsp->fs_rtpref
)) & 0xff) << 24 | ((__uint32_t)((int32_t)(fsp->
fs_rtpref)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(fsp->fs_rtpref)) & 0xff0000) >> 8 | ((__uint32_t
)((int32_t)(fsp->fs_rtpref)) & 0xff000000) >> 24
) : __swap32md((int32_t)(fsp->fs_rtpref))));
227 if (pref < nmp->nm_rsize)
228 nmp->nm_rsize = (pref + NFS_FABLKSIZE512 - 1) &
229 ~(NFS_FABLKSIZE512 - 1);
230 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(fsp->
fs_rtmax)) ? (__uint32_t)(((__uint32_t)((int32_t)(fsp->fs_rtmax
)) & 0xff) << 24 | ((__uint32_t)((int32_t)(fsp->
fs_rtmax)) & 0xff00) << 8 | ((__uint32_t)((int32_t)
(fsp->fs_rtmax)) & 0xff0000) >> 8 | ((__uint32_t
)((int32_t)(fsp->fs_rtmax)) & 0xff000000) >> 24)
: __swap32md((int32_t)(fsp->fs_rtmax))));
231 if (max < nmp->nm_rsize) {
232 nmp->nm_rsize = max & ~(NFS_FABLKSIZE512 - 1);
233 if (nmp->nm_rsize == 0)
234 nmp->nm_rsize = max;
235 }
236 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref)((u_int32_t)(__uint32_t)(__builtin_constant_p((int32_t)(fsp->
fs_dtpref)) ? (__uint32_t)(((__uint32_t)((int32_t)(fsp->fs_dtpref
)) & 0xff) << 24 | ((__uint32_t)((int32_t)(fsp->
fs_dtpref)) & 0xff00) << 8 | ((__uint32_t)((int32_t
)(fsp->fs_dtpref)) & 0xff0000) >> 8 | ((__uint32_t
)((int32_t)(fsp->fs_dtpref)) & 0xff000000) >> 24
) : __swap32md((int32_t)(fsp->fs_dtpref))));
237 if (pref < nmp->nm_readdirsize)
238 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ1024 - 1) &
239 ~(NFS_DIRBLKSIZ1024 - 1);
240 if (max < nmp->nm_readdirsize) {
241 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ1024 - 1);
242 if (nmp->nm_readdirsize == 0)
243 nmp->nm_readdirsize = max;
244 }
245 nmp->nm_flag |= NFSMNT_GOTFSINFO0x00100000;
246
247 m_freem(info.nmi_mrep);
248nfsmout:
249 return (error);
250}
251
252struct nfs_diskless nfs_diskless;
253
254/*
255 * Mount a remote root fs via. NFS. It goes like this:
256 * - Call nfs_boot_init() to fill in the nfs_diskless struct
257 * (using RARP, bootparam RPC, mountd RPC)
258 * - hand craft the swap nfs vnode hanging off a fake mount point
259 * if swdevt[0].sw_dev == NODEV
260 * - build the rootfs mount point and call mountnfs() to do the rest.
261 */
262int
263nfs_mountroot(void)
264{
265 struct vattr attr;
266 struct mount *mp;
267 struct vnode *vp;
1
'vp' declared without an initial value
→
268 struct proc *procp;
269 long n;
270 int error;
271
272 procp = curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r"
(__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self)));
__ci;})->ci_curproc; /* XXX */
273
274 /*
275 * Call nfs_boot_init() to fill in the nfs_diskless struct.
276 * Side effect: Finds and configures a network interface.
277 */
278 nfs_boot_init(&nfs_diskless, procp);
279
280 /*
281 * Create the root mount point.
282 */
283 if (nfs_boot_getfh(&nfs_diskless.nd_boot, "root", &nfs_diskless.nd_root, -1))
2
←
Assuming the condition is false
→
3
←
Taking false branch
→
284 panic("nfs_mountroot: root");
285 mp = nfs_mount_diskless(&nfs_diskless.nd_root, "/", 0, &vp, procp);
4
←
Calling 'nfs_mount_diskless'
→
14
←
Returning from 'nfs_mount_diskless'
→
286 printf("root on %s\n", nfs_diskless.nd_root.ndm_host);
287
288 /*
289 * Link it into the mount list.
290 */
291 TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list)do { (mp)->mnt_list.tqe_next = ((void *)0); (mp)->mnt_list
.tqe_prev = (&mountlist)->tqh_last; *(&mountlist)->
tqh_last = (mp); (&mountlist)->tqh_last = &(mp)->
mnt_list.tqe_next; } while (0);
15
←
Loop condition is false. Exiting loop
→
292 rootvp = vp;
16
←
Assigned value is garbage or undefined
293 vfs_unbusy(mp);
294
295 /* Get root attributes (for the time). */
296 error = VOP_GETATTR(rootvp, &attr, procp->p_ucred, procp);
297 if (error) panic("nfs_mountroot: getattr for root");
298 n = attr.va_atime.tv_sec;
299#ifdef DEBUG
300 printf("root time: 0x%lx\n", n);
301#endif
302 inittodr(n);
303
304#ifdef notyet
305 /* Set up swap credentials. */
306 proc0.p_ucred->cr_uid = ntohl(nfs_diskless.swap_ucred.cr_uid)(__uint32_t)(__builtin_constant_p(nfs_diskless.swap_ucred.cr_uid
) ? (__uint32_t)(((__uint32_t)(nfs_diskless.swap_ucred.cr_uid
) & 0xff) << 24 | ((__uint32_t)(nfs_diskless.swap_ucred
.cr_uid) & 0xff00) << 8 | ((__uint32_t)(nfs_diskless
.swap_ucred.cr_uid) & 0xff0000) >> 8 | ((__uint32_t
)(nfs_diskless.swap_ucred.cr_uid) & 0xff000000) >> 24
) : __swap32md(nfs_diskless.swap_ucred.cr_uid));
307 proc0.p_ucred->cr_gid = ntohl(nfs_diskless.swap_ucred.cr_gid)(__uint32_t)(__builtin_constant_p(nfs_diskless.swap_ucred.cr_gid
) ? (__uint32_t)(((__uint32_t)(nfs_diskless.swap_ucred.cr_gid
) & 0xff) << 24 | ((__uint32_t)(nfs_diskless.swap_ucred
.cr_gid) & 0xff00) << 8 | ((__uint32_t)(nfs_diskless
.swap_ucred.cr_gid) & 0xff0000) >> 8 | ((__uint32_t
)(nfs_diskless.swap_ucred.cr_gid) & 0xff000000) >> 24
) : __swap32md(nfs_diskless.swap_ucred.cr_gid));
308 if ((proc0.p_ucred->cr_ngroups = ntohs(nfs_diskless.swap_ucred.cr_ngroups)(__uint16_t)(__builtin_constant_p(nfs_diskless.swap_ucred.cr_ngroups
) ? (__uint16_t)(((__uint16_t)(nfs_diskless.swap_ucred.cr_ngroups
) & 0xffU) << 8 | ((__uint16_t)(nfs_diskless.swap_ucred
.cr_ngroups) & 0xff00U) >> 8) : __swap16md(nfs_diskless
.swap_ucred.cr_ngroups))) >
309 NGROUPS_MAX16)
310 proc0.p_ucred->cr_ngroups = NGROUPS_MAX16;
311 for (i = 0; i < proc0.p_ucred->cr_ngroups; i++)
312 proc0.p_ucred->cr_groups[i] = ntohl(nfs_diskless.swap_ucred.cr_groups[i])(__uint32_t)(__builtin_constant_p(nfs_diskless.swap_ucred.cr_groups
[i]) ? (__uint32_t)(((__uint32_t)(nfs_diskless.swap_ucred.cr_groups
[i]) & 0xff) << 24 | ((__uint32_t)(nfs_diskless.swap_ucred
.cr_groups[i]) & 0xff00) << 8 | ((__uint32_t)(nfs_diskless
.swap_ucred.cr_groups[i]) & 0xff0000) >> 8 | ((__uint32_t
)(nfs_diskless.swap_ucred.cr_groups[i]) & 0xff000000) >>
24) : __swap32md(nfs_diskless.swap_ucred.cr_groups[i]));
313#endif
314
315 /*
316 * "Mount" the swap device.
317 *
318 * On a "dataless" configuration (swap on disk) we will have:
319 * (swdevt[0].sw_dev != NODEV) identifying the swap device.
320 */
321 if (swdevt[0].sw_dev != NODEV(dev_t)(-1)) {
322 if (bdevvp(swapdev, &swapdev_vp))
323 panic("nfs_mountroot: can't setup swap vp");
324 printf("swap on device 0x%x\n", swdevt[0].sw_dev);
325 return (0);
326 }
327
328 /*
329 * If swapping to an nfs node: (swdevt[0].sw_dev == NODEV)
330 * Create a fake mount point just for the swap vnode so that the
331 * swap file can be on a different server from the rootfs.
332 *
333 * Wait 5 retries, finally no swap is cool. -mickey
334 */
335 error = nfs_boot_getfh(&nfs_diskless.nd_boot, "swap", &nfs_diskless.nd_swap, 5);
336 if (!error) {
337 mp = nfs_mount_diskless(&nfs_diskless.nd_swap, "/swap", 0, &vp,
338 procp);
339 vfs_unbusy(mp);
340
341 /*
342 * Since the swap file is not the root dir of a file system,
343 * hack it to a regular file.
344 */
345 vp->v_type = VREG;
346 vp->v_flag = 0;
347
348 /*
349 * Next line is a hack to make swapmount() work on NFS
350 * swap files.
351 */
352 swdevt[0].sw_dev = NETDEV(dev_t)(-2);
353 /* end hack */
354 nfs_diskless.sw_vp = vp;
355
356 /*
357 * Find out how large the swap file is.
358 */
359 error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp);
360 if (error)
361 printf("nfs_mountroot: getattr for swap\n");
362 n = (long) (attr.va_size >> DEV_BSHIFT9);
363
364 printf("swap on %s\n", nfs_diskless.nd_swap.ndm_host);
365#ifdef DEBUG
366 printf("swap size: 0x%lx (blocks)\n", n);
367#endif
368 return (0);
369 }
370
371 printf("WARNING: no swap\n");
372 swdevt[0].sw_dev = NODEV(dev_t)(-1);
373 return (0);
374}
375
376/*
377 * Internal version of mount system call for diskless setup.
378 */
379struct mount *
380nfs_mount_diskless(struct nfs_dlmount *ndmntp, char *mntname, int mntflag,
381 struct vnode **vpp, struct proc *p)
382{
383 struct mount *mp;
384 struct mbuf *m;
385 int error;
386
387 if (vfs_rootmountalloc("nfs", mntname, &mp))
5
←
Assuming the condition is false
→
6
←
Taking false branch
→
388 panic("nfs_mount_diskless: vfs_rootmountalloc failed");
389 mp->mnt_flag |= mntflag;
390
391 /* Get mbuf for server sockaddr. */
392 m = m_get(M_WAIT0x0001, MT_SONAME3);
393 bcopy(ndmntp->ndm_args.addr, mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)),
394 (m->m_lenm_hdr.mh_len = ndmntp->ndm_args.addr->sa_len));
395
396 error = mountnfs(&ndmntp->ndm_args, mp, m, mntname,
7
←
Calling 'mountnfs'
→
11
←
Returning from 'mountnfs'
→
397 ndmntp->ndm_args.hostname, vpp, p);
398 if (error
11.1
'error' is 0
)
12
←
Taking false branch
→
399 panic("nfs_mountroot: mount %s failed: %d", mntname, error);
400
401 return (mp);
13
←
Returning without writing to '*vpp'
→
402}
403
404void
405nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp,
406 struct nfs_args *nargp)
407{
408 int adjsock = 0;
409 int maxio;
410
411#if 0
412 /* Re-bind if rsrvd port requested and wasn't on one */
413 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT0x00000000)
414 && (argp->flags & NFSMNT_RESVPORT0x00000000);
415#endif
416 /* Also re-bind if we're switching to/from a connected UDP socket */
417 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN0x00000080) !=
418 (argp->flags & NFSMNT_NOCONN0x00000080));
419
420 nmp->nm_flag =
421 (argp->flags & ~NFSMNT_INTERNAL0xfffc0000) | (nmp->nm_flag & NFSMNT_INTERNAL0xfffc0000);
422
423 if ((argp->flags & NFSMNT_TIMEO0x00000008) && argp->timeo > 0) {
424 nmp->nm_timeo = (argp->timeo * NFS_HZ(hz / nfs_ticks) + 5) / 10;
425 if (nmp->nm_timeo < NFS_MINTIMEO(1 * (hz / nfs_ticks)))
426 nmp->nm_timeo = NFS_MINTIMEO(1 * (hz / nfs_ticks));
427 else if (nmp->nm_timeo > NFS_MAXTIMEO(60 * (hz / nfs_ticks)))
428 nmp->nm_timeo = NFS_MAXTIMEO(60 * (hz / nfs_ticks));
429 }
430
431 if ((argp->flags & NFSMNT_RETRANS0x00000010) && argp->retrans > 1)
432 nmp->nm_retry = MIN(argp->retrans, NFS_MAXREXMIT)(((argp->retrans)<(100))?(argp->retrans):(100));
433 if (!(nmp->nm_flag & NFSMNT_SOFT0x00000001))
434 nmp->nm_retry = NFS_MAXREXMIT100 + 1; /* past clip limit */
435
436 if (argp->flags & NFSMNT_NFSV30x00000200) {
437 if (argp->sotype == SOCK_DGRAM2)
438 maxio = NFS_MAXDGRAMDATA32768;
439 else
440 maxio = NFS_MAXDATA(64 * 1024);
441 } else
442 maxio = NFS_V2MAXDATA8192;
443
444 if ((argp->flags & NFSMNT_WSIZE0x00000002) && argp->wsize > 0) {
445 int osize = nmp->nm_wsize;
446 nmp->nm_wsize = argp->wsize;
447 /* Round down to multiple of blocksize */
448 nmp->nm_wsize &= ~(NFS_FABLKSIZE512 - 1);
449 if (nmp->nm_wsize <= 0)
450 nmp->nm_wsize = NFS_FABLKSIZE512;
451 adjsock |= (nmp->nm_wsize != osize);
452 }
453 if (nmp->nm_wsize > maxio)
454 nmp->nm_wsize = maxio;
455 if (nmp->nm_wsize > MAXBSIZE(64 * 1024))
456 nmp->nm_wsize = MAXBSIZE(64 * 1024);
457
458 if ((argp->flags & NFSMNT_RSIZE0x00000004) && argp->rsize > 0) {
459 int osize = nmp->nm_rsize;
460 nmp->nm_rsize = argp->rsize;
461 /* Round down to multiple of blocksize */
462 nmp->nm_rsize &= ~(NFS_FABLKSIZE512 - 1);
463 if (nmp->nm_rsize <= 0)
464 nmp->nm_rsize = NFS_FABLKSIZE512;
465 adjsock |= (nmp->nm_rsize != osize);
466 }
467 if (nmp->nm_rsize > maxio)
468 nmp->nm_rsize = maxio;
469 if (nmp->nm_rsize > MAXBSIZE(64 * 1024))
470 nmp->nm_rsize = MAXBSIZE(64 * 1024);
471
472 if ((argp->flags & NFSMNT_READDIRSIZE0x00020000) && argp->readdirsize > 0) {
473 nmp->nm_readdirsize = argp->readdirsize;
474 /* Round down to multiple of blocksize */
475 nmp->nm_readdirsize &= ~(NFS_DIRBLKSIZ1024 - 1);
476 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ1024)
477 nmp->nm_readdirsize = NFS_DIRBLKSIZ1024;
478 } else if (argp->flags & NFSMNT_RSIZE0x00000004)
479 nmp->nm_readdirsize = nmp->nm_rsize;
480
481 if (nmp->nm_readdirsize > maxio)
482 nmp->nm_readdirsize = maxio;
483
484 if ((argp->flags & NFSMNT_MAXGRPS0x00000020) && argp->maxgrouplist >= 0 &&
485 argp->maxgrouplist <= NFS_MAXGRPS16)
486 nmp->nm_numgrps = argp->maxgrouplist;
487 if ((argp->flags & NFSMNT_READAHEAD0x00002000) && argp->readahead >= 0 &&
488 argp->readahead <= NFS_MAXRAHEAD4)
489 nmp->nm_readahead = argp->readahead;
490 if (argp->flags & NFSMNT_ACREGMIN0x00040000 && argp->acregmin >= 0) {
491 if (argp->acregmin > 0xffff)
492 nmp->nm_acregmin = 0xffff;
493 else
494 nmp->nm_acregmin = argp->acregmin;
495 }
496 if (argp->flags & NFSMNT_ACREGMAX0x00080000 && argp->acregmax >= 0) {
497 if (argp->acregmax > 0xffff)
498 nmp->nm_acregmax = 0xffff;
499 else
500 nmp->nm_acregmax = argp->acregmax;
501 }
502 if (nmp->nm_acregmin > nmp->nm_acregmax)
503 nmp->nm_acregmin = nmp->nm_acregmax;
504
505 if (argp->flags & NFSMNT_ACDIRMIN0x00100000 && argp->acdirmin >= 0) {
506 if (argp->acdirmin > 0xffff)
507 nmp->nm_acdirmin = 0xffff;
508 else
509 nmp->nm_acdirmin = argp->acdirmin;
510 }
511 if (argp->flags & NFSMNT_ACDIRMAX0x00200000 && argp->acdirmax >= 0) {
512 if (argp->acdirmax > 0xffff)
513 nmp->nm_acdirmax = 0xffff;
514 else
515 nmp->nm_acdirmax = argp->acdirmax;
516 }
517 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
518 nmp->nm_acdirmin = nmp->nm_acdirmax;
519
520 if (nmp->nm_so && adjsock) {
521 nfs_disconnect(nmp);
522 if (nmp->nm_sotype == SOCK_DGRAM2)
523 while (nfs_connect(nmp, NULL((void *)0))) {
524 printf("nfs_args: retrying connect\n");
525 tsleep_nsec(&nowake, PSOCK24, "nfscon",
526 SEC_TO_NSEC(1));
527 }
528 }
529
530 /* Update nargp based on nmp */
531 nargp->wsize = nmp->nm_wsize;
532 nargp->rsize = nmp->nm_rsize;
533 nargp->readdirsize = nmp->nm_readdirsize;
534 nargp->timeo = nmp->nm_timeo;
535 nargp->retrans = nmp->nm_retry;
536 nargp->maxgrouplist = nmp->nm_numgrps;
537 nargp->readahead = nmp->nm_readahead;
538 nargp->acregmin = nmp->nm_acregmin;
539 nargp->acregmax = nmp->nm_acregmax;
540 nargp->acdirmin = nmp->nm_acdirmin;
541 nargp->acdirmax = nmp->nm_acdirmax;
542}
543
544/*
545 * VFS Operations.
546 *
547 * mount system call
548 * It seems a bit dumb to copyinstr() the host here and then
549 * bcopy() it in mountnfs(), but I wanted to detect errors before
550 * doing the sockargs() call because sockargs() allocates an mbuf and
551 * an error after that means that I have to release the mbuf.
552 */
553/* ARGSUSED */
554int
555nfs_mount(struct mount *mp, const char *path, void *data,
556 struct nameidata *ndp, struct proc *p)
557{
558 int error;
559 struct nfs_args *args = data;
560 struct mbuf *nam;
561 struct vnode *vp;
562 char hst[MNAMELEN90];
563 size_t len;
564 u_char nfh[NFSX_V3FHMAX64];
565
566 if (args &&
567 (args->flags & (NFSMNT_NFSV30x00000200|NFSMNT_RDIRPLUS0x00010000)) == NFSMNT_RDIRPLUS0x00010000)
568 return (EINVAL22);
569
570 if (nfs_niothreads < 0) {
571 nfs_niothreads = 4;
572 nfs_getset_niothreads(1);
573 }
574
575 if (mp->mnt_flag & MNT_UPDATE0x00010000) {
576 struct nfsmount *nmp = VFSTONFS(mp)((struct nfsmount *)((mp)->mnt_data));
577
578 if (nmp == NULL((void *)0))
579 return (EIO5);
580 /*
581 * When doing an update, we can't change from or to
582 * v3.
583 */
584 if (args) {
585 args->flags = (args->flags & ~(NFSMNT_NFSV30x00000200)) |
586 (nmp->nm_flag & (NFSMNT_NFSV30x00000200));
587 nfs_decode_args(nmp, args, &mp->mnt_stat.mount_info.nfs_args);
588 }
589 return (0);
590 }
591 if (args->fhsize < 0 || args->fhsize > NFSX_V3FHMAX64)
592 return (EINVAL22);
593 error = copyin(args->fh, nfh, args->fhsize);
594 if (error)
595 return (error);
596 error = copyinstr(args->hostname, hst, MNAMELEN90-1, &len);
597 if (error)
598 return (error);
599 memset(&hst[len], 0, MNAMELEN - len)__builtin_memset((&hst[len]), (0), (90 - len));
600 /* sockargs() call must be after above copyin() calls */
601 error = sockargs(&nam, args->addr, args->addrlen, MT_SONAME3);
602 if (error)
603 return (error);
604 args->fh = nfh;
605 error = mountnfs(args, mp, nam, path, hst, &vp, p);
606 return (error);
607}
608
609/*
610 * Common code for mount and mountroot
611 */
612int
613mountnfs(struct nfs_args *argp, struct mount *mp, struct mbuf *nam,
614 const char *pth, char *hst, struct vnode **vpp, struct proc *p)
615{
616 struct nfsmount *nmp;
617 struct nfsnode *np;
618 struct vnode *vp;
619 struct vattr attr;
620 int error;
621
622 if (mp->mnt_flag & MNT_UPDATE0x00010000) {
8
←
Assuming the condition is true
→
9
←
Taking true branch
→
623 nmp = VFSTONFS(mp)((struct nfsmount *)((mp)->mnt_data));
624 /* update paths, file handles, etc, here XXX */
625 m_freem(nam);
626 return (0);
10
←
Returning without writing to '*vpp'
→
627 } else {
628 nmp = malloc(sizeof(*nmp), M_NFSMNT23,
629 M_WAITOK0x0001|M_ZERO0x0008);
630 mp->mnt_data = nmp;
631 }
632
633 vfs_getnewfsid(mp);
634 nmp->nm_mountp = mp;
635 nmp->nm_timeo = NFS_TIMEO(1 * (hz / nfs_ticks));
636 nmp->nm_retry = NFS_RETRANS10;
637 nmp->nm_wsize = NFS_WSIZE8192;
638 nmp->nm_rsize = NFS_RSIZE8192;
639 nmp->nm_readdirsize = NFS_READDIRSIZE8192;
640 nmp->nm_numgrps = NFS_MAXGRPS16;
641 nmp->nm_readahead = NFS_DEFRAHEAD1;
642 nmp->nm_acregmin = NFS_MINATTRTIMO5;
643 nmp->nm_acregmax = NFS_MAXATTRTIMO60;
644 nmp->nm_acdirmin = NFS_MINATTRTIMO5;
645 nmp->nm_acdirmax = NFS_MAXATTRTIMO60;
646 mp->mnt_stat.f_namemax = MAXNAMLEN255;
647 memset(mp->mnt_stat.f_mntonname, 0, MNAMELEN)__builtin_memset((mp->mnt_stat.f_mntonname), (0), (90));
648 strlcpy(mp->mnt_stat.f_mntonname, pth, MNAMELEN90);
649 memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN)__builtin_memset((mp->mnt_stat.f_mntfromname), (0), (90));
650 strlcpy(mp->mnt_stat.f_mntfromname, hst, MNAMELEN90);
651 memset(mp->mnt_stat.f_mntfromspec, 0, MNAMELEN)__builtin_memset((mp->mnt_stat.f_mntfromspec), (0), (90));
652 strlcpy(mp->mnt_stat.f_mntfromspec, hst, MNAMELEN90);
653 bcopy(argp, &mp->mnt_stat.mount_info.nfs_args, sizeof(*argp));
654 nmp->nm_nam = nam;
655 nfs_decode_args(nmp, argp, &mp->mnt_stat.mount_info.nfs_args);
656
657 nfs_ninit(nmp);
658 TAILQ_INIT(&nmp->nm_reqsq)do { (&nmp->nm_reqsq)->tqh_first = ((void *)0); (&
nmp->nm_reqsq)->tqh_last = &(&nmp->nm_reqsq)
->tqh_first; } while (0);
659 timeout_set_proc(&nmp->nm_rtimeout, nfs_timer, nmp);
660
661 /* Set up the sockets and per-host congestion */
662 nmp->nm_sotype = argp->sotype;
663 nmp->nm_soproto = argp->proto;
664
665 /*
666 * For Connection based sockets (TCP,...) defer the connect until
667 * the first request, in case the server is not responding.
668 */
669 if (nmp->nm_sotype == SOCK_DGRAM2 &&
670 (error = nfs_connect(nmp, NULL((void *)0))))
671 goto bad;
672
673 /*
674 * This is silly, but it has to be set so that vinifod() works.
675 * We do not want to do an nfs_statfs() here since we can get
676 * stuck on a dead server and we are holding a lock on the mount
677 * point.
678 */
679 mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA32768;
680 error = nfs_nget(mp, (nfsfh_t *)argp->fh, argp->fhsize, &np);
681 if (error)
682 goto bad;
683 vp = NFSTOV(np)((np)->n_vnode);
684 error = VOP_GETATTR(vp, &attr, p->p_ucred, p);
685 if (error) {
686 vput(vp);
687 goto bad;
688 }
689
690 /*
691 * A reference count is needed on the nfsnode representing the
692 * remote root. If this object is not persistent, then backward
693 * traversals of the mount point (i.e. "..") will not work if
694 * the nfsnode gets flushed out of the cache. Ufs does not have
695 * this problem, because one can identify root inodes by their
696 * number == ROOTINO (2). So, just unlock, but no rele.
697 */
698 nmp->nm_vnode = vp;
699 if (vp->v_type == VNON)
700 vp->v_type = VDIR;
701 vp->v_flag = VROOT0x0001;
702 VOP_UNLOCK(vp);
703 *vpp = vp;
704
705 return (0);
706bad:
707 nfs_disconnect(nmp);
708 free(nmp, M_NFSMNT23, sizeof(*nmp));
709 m_freem(nam);
710 return (error);
711}
712
713/* unmount system call */
714int
715nfs_unmount(struct mount *mp, int mntflags, struct proc *p)
716{
717 struct nfsmount *nmp;
718 struct vnode *vp;
719 int error, flags = 0;
720
721 nmp = VFSTONFS(mp)((struct nfsmount *)((mp)->mnt_data));
722 error = nfs_root(mp, &vp);
723 if (error)
724 return (error);
725
726 if ((mntflags & MNT_FORCE0x00080000) == 0 && vp->v_usecount > 2) {
727 vput(vp);
728 return (EBUSY16);
729 }
730
731 if (mntflags & MNT_FORCE0x00080000)
732 flags |= FORCECLOSE0x0002;
733
734 error = vflush(mp, vp, flags);
735 if (error) {
736 vput(vp);
737 return (error);
738 }
739
740 /*
741 * There are two references count to get rid of here: one
742 * from mountnfs() and one from nfs_root() above.
743 */
744 vrele(vp);
745 vput(vp);
746 vgone(vp);
747 nfs_disconnect(nmp);
748 m_freem(nmp->nm_nam);
749 timeout_del(&nmp->nm_rtimeout);
750 timeout_set_proc(&nmp->nm_rtimeout, nfs_reaper, nmp);
751 timeout_add(&nmp->nm_rtimeout, 0);
752 mp->mnt_data = NULL((void *)0);
753 return (0);
754}
755
756/*
757 * Delay nfs mount point free until pending or sleeping timeouts have finished.
758 */
759void
760nfs_reaper(void *arg)
761{
762 struct nfsmount *nmp = arg;
763
764 free(nmp, M_NFSMNT23, sizeof(*nmp));
765}
766
767/*
768 * Return root of a filesystem
769 */
770int
771nfs_root(struct mount *mp, struct vnode **vpp)
772{
773 struct vnode *vp;
774 struct nfsmount *nmp;
775 int error;
776
777 nmp = VFSTONFS(mp)((struct nfsmount *)((mp)->mnt_data));
778 vp = nmp->nm_vnode;
779 vref(vp);
780 error = vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL);
781 if (error) {
782 vrele(vp);
783 return (error);
784 }
785 *vpp = vp;
786 return (0);
787}
788
789/*
790 * Flush out the buffer cache
791 */
792int
793nfs_sync(struct mount *mp, int waitfor, int stall, struct ucred *cred, struct proc *p)
794{
795 struct vnode *vp;
796 int error, allerror = 0;
797
798 /*
799 * Don't traverse the vnode list if we want to skip all of them.
800 */
801 if (waitfor == MNT_LAZY3)
802 return (allerror);
803
804 /*
805 * Force stale buffer cache information to be flushed.
806 */
807loop:
808 TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes)for((vp) = ((&mp->mnt_vnodelist)->tqh_first); (vp) !=
((void *)0); (vp) = ((vp)->v_mntvnodes.tqe_next)) {
809 /*
810 * If the vnode that we are about to sync is no longer
811 * associated with this mount point, start over.
812 */
813 if (vp->v_mount != mp)
814 goto loop;
815 if (VOP_ISLOCKED(vp) || LIST_EMPTY(&vp->v_dirtyblkhd)(((&vp->v_dirtyblkhd)->lh_first) == ((void *)0)))
816 continue;
817 if (vget(vp, LK_EXCLUSIVE0x0001UL))
818 goto loop;
819 error = VOP_FSYNC(vp, cred, waitfor, p);
820 if (error)
821 allerror = error;
822 vput(vp);
823 }
824
825 return (allerror);
826}
827
828/*
829 * NFS flat namespace lookup.
830 * Currently unsupported.
831 */
832/* ARGSUSED */
833int
834nfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
835{
836
837 return (EOPNOTSUPP45);
838}
839
840/*
841 * Do that sysctl thang...
842 */
843int
844nfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
845 size_t newlen, struct proc *p)
846{
847 int rv;
848
849 /*
850 * All names at this level are terminal.
851 */
852 if(namelen > 1)
853 return ENOTDIR20; /* overloaded */
854
855 switch(name[0]) {
856 case NFS_NFSSTATS1:
857 if(!oldp) {
858 *oldlenp = sizeof nfsstats;
859 return 0;
860 }
861
862 if(*oldlenp < sizeof nfsstats) {
863 *oldlenp = sizeof nfsstats;
864 return ENOMEM12;
865 }
866
867 rv = copyout(&nfsstats, oldp, sizeof nfsstats);
868 if(rv) return rv;
869
870 if(newp && newlen != sizeof nfsstats)
871 return EINVAL22;
872
873 if(newp) {
874 return copyin(newp, &nfsstats, sizeof nfsstats);
875 }
876 return 0;
877
878 case NFS_NIOTHREADS2:
879 nfs_getset_niothreads(0);
880
881 rv = sysctl_int(oldp, oldlenp, newp, newlen, &nfs_niothreads);
882 if (newp)
883 nfs_getset_niothreads(1);
884
885 return rv;
886
887 default:
888 return EOPNOTSUPP45;
889 }
890}
891
892
893/*
894 * At this point, this should never happen
895 */
896/* ARGSUSED */
897int
898nfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
899{
900 return (EINVAL22);
901}
902
903/*
904 * Vnode pointer to File handle, should never happen either
905 */
906/* ARGSUSED */
907int
908nfs_vptofh(struct vnode *vp, struct fid *fhp)
909{
910 return (EINVAL22);
911}
912
913/*
914 * Vfs start routine, a no-op.
915 */
916/* ARGSUSED */
917int
918nfs_start(struct mount *mp, int flags, struct proc *p)
919{
920 return (0);
921}
922
923/*
924 * Do operations associated with quotas, not supported
925 */
926/* ARGSUSED */
927int
928nfs_quotactl(struct mount *mp, int cmd, uid_t uid, caddr_t arg, struct proc *p)
929{
930 return (EOPNOTSUPP45);
931}
932
933/*
934 * check export permission, not supported
935 */
936/* ARGUSED */
937int
938nfs_checkexp(struct mount *mp, struct mbuf *nam, int *exflagsp,
939 struct ucred **credanonp)
940{
941 return (EOPNOTSUPP45);
942}
943