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/* |
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* Copyright (c) 1990 Jan-Simon Pendry |
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* Copyright (c) 1990 Imperial College of Science, Technology & Medicine |
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* Copyright (c) 1990, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Jan-Simon Pendry at Imperial College, London. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* from: @(#)nfs_subr.c 8.1 (Berkeley) 6/6/93 |
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* $Id: nfs_subr.c,v 1.9 2015/01/22 03:43:58 guenther Exp $ |
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*/ |
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#include "am.h" |
39 |
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40 |
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/* |
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* Convert from UN*X to NFS error code |
42 |
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*/ |
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#ifdef NFS_ERROR_MAPPING |
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NFS_ERROR_MAPPING |
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#define nfs_error(e) \ |
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((nfsstat)((e) > NFS_LOMAP && (e) < NFS_HIMAP ? \ |
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nfs_errormap[(e) - NFS_LOMAP] : (e))) |
48 |
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#else |
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#define nfs_error(e) ((nfsstat)(e)) |
50 |
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#endif /* NFS_ERROR_MAPPING */ |
51 |
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52 |
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static char * |
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do_readlink(am_node *mp, int *error_return, struct attrstat **attrpp) |
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{ |
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char *ln; |
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/* |
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* If there is a readlink method, then use |
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* that, otherwise if a link exists use |
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* that, otherwise use the mount point. |
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*/ |
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if (mp->am_mnt->mf_ops->readlink) { |
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int retry = 0; |
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mp = (*mp->am_mnt->mf_ops->readlink)(mp, &retry); |
65 |
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if (mp == 0) { |
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*error_return = retry; |
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return 0; |
68 |
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} |
69 |
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/*reschedule_timeout_mp();*/ |
70 |
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} |
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if (mp->am_link) { |
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ln = mp->am_link; |
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} else { |
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ln = mp->am_mnt->mf_mount; |
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} |
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if (attrpp) |
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*attrpp = &mp->am_attr; |
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return ln; |
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} |
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void * |
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nfsproc_null_2_svc(void *argp, struct svc_req *rqstp) |
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{ |
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static char res; |
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86 |
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return &res; |
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} |
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89 |
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90 |
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struct attrstat * |
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nfsproc_getattr_2_svc(struct nfs_fh *argp, struct svc_req *rqstp) |
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{ |
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static struct attrstat res; |
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am_node *mp; |
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int retry; |
96 |
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97 |
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#ifdef DEBUG |
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Debug(D_TRACE) |
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plog(XLOG_DEBUG, "gettattr:"); |
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#endif /* DEBUG */ |
101 |
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102 |
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mp = fh_to_mp2(argp, &retry); |
103 |
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if (mp == 0) { |
104 |
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getattr_retry: |
105 |
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106 |
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if (retry < 0) |
107 |
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return 0; |
108 |
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res.status = nfs_error(retry); |
109 |
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} else { |
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struct attrstat *attrp = &mp->am_attr; |
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if (mp->am_fattr.type == NFLNK) { |
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/* |
113 |
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* Make sure we can read the link, |
114 |
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* and then determine the length. |
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*/ |
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char *ln = do_readlink(mp, &retry, &attrp); |
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if (ln == 0) |
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goto getattr_retry; |
119 |
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} |
120 |
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#ifdef DEBUG |
121 |
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Debug(D_TRACE) |
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plog(XLOG_DEBUG, "\tstat(%s), size = %d", mp->am_path, attrp->attrstat_u.attributes.size); |
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#endif /* DEBUG */ |
124 |
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mp->am_stats.s_getattr++; |
125 |
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return attrp; |
126 |
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} |
127 |
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128 |
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return &res; |
129 |
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} |
130 |
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131 |
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132 |
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struct attrstat * |
133 |
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nfsproc_setattr_2_svc(struct sattrargs *argp, struct svc_req *rqstp) |
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{ |
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static struct attrstat res; |
136 |
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137 |
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if (!fh_to_mp(&argp->file)) |
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res.status = nfs_error(ESTALE); |
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else |
140 |
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res.status = nfs_error(EROFS); |
141 |
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142 |
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return &res; |
143 |
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} |
144 |
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145 |
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146 |
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void * |
147 |
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nfsproc_root_2_svc(void *argp, struct svc_req *rqstp) |
148 |
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{ |
149 |
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static char res; |
150 |
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151 |
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return &res; |
152 |
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} |
153 |
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154 |
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155 |
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struct diropres * |
156 |
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nfsproc_lookup_2_svc(struct diropargs *argp, struct svc_req *rqstp) |
157 |
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{ |
158 |
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static struct diropres res; |
159 |
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am_node *mp; |
160 |
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int retry; |
161 |
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162 |
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#ifdef DEBUG |
163 |
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Debug(D_TRACE) |
164 |
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plog(XLOG_DEBUG, "lookup:"); |
165 |
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#endif /* DEBUG */ |
166 |
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167 |
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mp = fh_to_mp2(&argp->dir, &retry); |
168 |
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if (mp == 0) { |
169 |
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if (retry < 0) |
170 |
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return 0; |
171 |
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res.status = nfs_error(retry); |
172 |
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} else { |
173 |
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int error; |
174 |
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am_node *ap; |
175 |
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#ifdef DEBUG |
176 |
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Debug(D_TRACE) |
177 |
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plog(XLOG_DEBUG, "\tlookuppn(%s, %s)", mp->am_path, argp->name); |
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#endif /* DEBUG */ |
179 |
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ap = (*mp->am_mnt->mf_ops->lookuppn)(mp, argp->name, &error, VLOOK_CREATE); |
180 |
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if (ap == 0) { |
181 |
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if (error < 0) { |
182 |
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#ifdef DEBUG |
183 |
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dlog("Not sending RPC reply"); |
184 |
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#endif /* DEBUG */ |
185 |
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amd_stats.d_drops++; |
186 |
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return 0; |
187 |
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} |
188 |
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res.status = nfs_error(error); |
189 |
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} else { |
190 |
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mp_to_fh(ap, &res.diropres_u.diropres.file); |
191 |
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res.diropres_u.diropres.attributes = ap->am_fattr; |
192 |
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res.status = NFS_OK; |
193 |
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} |
194 |
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mp->am_stats.s_lookup++; |
195 |
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/*reschedule_timeout_mp();*/ |
196 |
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} |
197 |
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198 |
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return &res; |
199 |
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} |
200 |
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201 |
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202 |
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struct readlinkres * |
203 |
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nfsproc_readlink_2_svc(struct nfs_fh *argp, struct svc_req *rqstp) |
204 |
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{ |
205 |
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static struct readlinkres res; |
206 |
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am_node *mp; |
207 |
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int retry; |
208 |
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209 |
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#ifdef DEBUG |
210 |
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Debug(D_TRACE) |
211 |
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plog(XLOG_DEBUG, "readlink:"); |
212 |
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#endif /* DEBUG */ |
213 |
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214 |
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mp = fh_to_mp2(argp, &retry); |
215 |
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if (mp == 0) { |
216 |
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readlink_retry: |
217 |
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if (retry < 0) |
218 |
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return 0; |
219 |
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res.status = nfs_error(retry); |
220 |
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} else { |
221 |
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char *ln = do_readlink(mp, &retry, (struct attrstat **) 0); |
222 |
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if (ln == 0) |
223 |
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goto readlink_retry; |
224 |
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res.status = NFS_OK; |
225 |
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#ifdef DEBUG |
226 |
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Debug(D_TRACE) |
227 |
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if (ln) |
228 |
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plog(XLOG_DEBUG, "\treadlink(%s) = %s", mp->am_path, ln); |
229 |
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#endif /* DEBUG */ |
230 |
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res.readlinkres_u.data = ln; |
231 |
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mp->am_stats.s_readlink++; |
232 |
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} |
233 |
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234 |
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return &res; |
235 |
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} |
236 |
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237 |
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238 |
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struct readres * |
239 |
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nfsproc_read_2_svc(struct readargs *argp, struct svc_req *rqstp) |
240 |
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{ |
241 |
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static struct readres res; |
242 |
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|
243 |
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bzero(&res, sizeof(res)); |
244 |
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|
245 |
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res.status = nfs_error(EACCES); |
246 |
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|
247 |
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return &res; |
248 |
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} |
249 |
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250 |
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251 |
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void * |
252 |
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nfsproc_writecache_2_svc(void *argp, struct svc_req *rqstp) |
253 |
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{ |
254 |
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static char res; |
255 |
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|
256 |
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return &res; |
257 |
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} |
258 |
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259 |
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|
260 |
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struct attrstat * |
261 |
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nfsproc_write_2_svc(writeargs *argp, struct svc_req *rqstp) |
262 |
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{ |
263 |
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static struct attrstat res; |
264 |
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|
265 |
|
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if (!fh_to_mp(&argp->file)) |
266 |
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res.status = nfs_error(ESTALE); |
267 |
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else |
268 |
|
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res.status = nfs_error(EROFS); |
269 |
|
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|
270 |
|
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return &res; |
271 |
|
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} |
272 |
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|
273 |
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|
274 |
|
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struct diropres * |
275 |
|
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nfsproc_create_2_svc(createargs *argp, struct svc_req *rqstp) |
276 |
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{ |
277 |
|
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static struct diropres res; |
278 |
|
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|
279 |
|
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if (!fh_to_mp(&argp->where.dir)) |
280 |
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res.status = nfs_error(ESTALE); |
281 |
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else |
282 |
|
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res.status = nfs_error(EROFS); |
283 |
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|
284 |
|
|
return &res; |
285 |
|
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} |
286 |
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|
287 |
|
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|
288 |
|
|
static nfsstat * |
289 |
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unlink_or_rmdir(struct diropargs *argp, struct svc_req *rqstp, |
290 |
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int unlinkp) |
291 |
|
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{ |
292 |
|
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static nfsstat res; |
293 |
|
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int retry; |
294 |
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/*mntfs *mf;*/ |
295 |
|
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am_node *mp = fh_to_mp3(&argp->dir, &retry, VLOOK_DELETE); |
296 |
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|
297 |
|
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if (mp == 0) { |
298 |
|
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if (retry < 0) |
299 |
|
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return 0; |
300 |
|
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res = nfs_error(retry); |
301 |
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goto out; |
302 |
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} |
303 |
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/*mf = mp->am_mnt;*/ |
304 |
|
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if (mp->am_fattr.type != NFDIR) { |
305 |
|
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res = nfs_error(ENOTDIR); |
306 |
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goto out; |
307 |
|
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} |
308 |
|
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#ifdef DEBUG |
309 |
|
|
Debug(D_TRACE) |
310 |
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plog(XLOG_DEBUG, "\tremove(%s, %s)", mp->am_path, argp->name); |
311 |
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#endif /* DEBUG */ |
312 |
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mp = (*mp->am_mnt->mf_ops->lookuppn)(mp, argp->name, &retry, VLOOK_DELETE); |
313 |
|
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if (mp == 0) { |
314 |
|
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/* |
315 |
|
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* Ignore retries... |
316 |
|
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*/ |
317 |
|
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if (retry < 0) |
318 |
|
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retry = 0; |
319 |
|
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/* |
320 |
|
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* Usual NFS workaround... |
321 |
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*/ |
322 |
|
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else if (retry == ENOENT) |
323 |
|
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retry = 0; |
324 |
|
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res = nfs_error(retry); |
325 |
|
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} else { |
326 |
|
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forcibly_timeout_mp(mp); |
327 |
|
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res = NFS_OK; |
328 |
|
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} |
329 |
|
|
|
330 |
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out: |
331 |
|
|
return &res; |
332 |
|
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} |
333 |
|
|
|
334 |
|
|
|
335 |
|
|
nfsstat * |
336 |
|
|
nfsproc_remove_2_svc(struct diropargs *argp, struct svc_req *rqstp) |
337 |
|
|
{ |
338 |
|
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return unlink_or_rmdir(argp, rqstp, TRUE); |
339 |
|
|
} |
340 |
|
|
|
341 |
|
|
nfsstat * |
342 |
|
|
nfsproc_rename_2_svc(renameargs *argp, struct svc_req *rqstp) |
343 |
|
|
{ |
344 |
|
|
static nfsstat res; |
345 |
|
|
if (!fh_to_mp(&argp->from.dir) || !fh_to_mp(&argp->to.dir)) |
346 |
|
|
res = nfs_error(ESTALE); |
347 |
|
|
/* |
348 |
|
|
* If the kernel is doing clever things with referenced files |
349 |
|
|
* then let it pretend... |
350 |
|
|
*/ |
351 |
|
|
else if (strncmp(argp->to.name, ".nfs", 4) == 0) |
352 |
|
|
res = NFS_OK; |
353 |
|
|
/* |
354 |
|
|
* otherwise a failure |
355 |
|
|
*/ |
356 |
|
|
else |
357 |
|
|
res = nfs_error(EROFS); |
358 |
|
|
return &res; |
359 |
|
|
} |
360 |
|
|
|
361 |
|
|
|
362 |
|
|
nfsstat * |
363 |
|
|
nfsproc_link_2_svc(linkargs *argp, struct svc_req *rqstp) |
364 |
|
|
{ |
365 |
|
|
static nfsstat res; |
366 |
|
|
if (!fh_to_mp(&argp->from) || !fh_to_mp(&argp->to.dir)) |
367 |
|
|
res = nfs_error(ESTALE); |
368 |
|
|
else |
369 |
|
|
res = nfs_error(EROFS); |
370 |
|
|
|
371 |
|
|
return &res; |
372 |
|
|
} |
373 |
|
|
|
374 |
|
|
|
375 |
|
|
nfsstat * |
376 |
|
|
nfsproc_symlink_2_svc(symlinkargs *argp, struct svc_req *rqstp) |
377 |
|
|
{ |
378 |
|
|
static nfsstat res; |
379 |
|
|
if (!fh_to_mp(&argp->from.dir)) |
380 |
|
|
res = nfs_error(ESTALE); |
381 |
|
|
else |
382 |
|
|
res = nfs_error(EROFS); |
383 |
|
|
|
384 |
|
|
return &res; |
385 |
|
|
} |
386 |
|
|
|
387 |
|
|
|
388 |
|
|
struct diropres * |
389 |
|
|
nfsproc_mkdir_2_svc(createargs *argp, struct svc_req *rqstp) |
390 |
|
|
{ |
391 |
|
|
static struct diropres res; |
392 |
|
|
if (!fh_to_mp(&argp->where.dir)) |
393 |
|
|
res.status = nfs_error(ESTALE); |
394 |
|
|
else |
395 |
|
|
res.status = nfs_error(EROFS); |
396 |
|
|
|
397 |
|
|
return &res; |
398 |
|
|
} |
399 |
|
|
|
400 |
|
|
|
401 |
|
|
nfsstat * |
402 |
|
|
nfsproc_rmdir_2_svc(struct diropargs *argp, struct svc_req *rqstp) |
403 |
|
|
{ |
404 |
|
|
return unlink_or_rmdir(argp, rqstp, FALSE); |
405 |
|
|
} |
406 |
|
|
|
407 |
|
|
|
408 |
|
|
struct readdirres * |
409 |
|
|
nfsproc_readdir_2_svc(readdirargs *argp, struct svc_req *rqstp) |
410 |
|
|
{ |
411 |
|
|
static readdirres res; |
412 |
|
|
static entry e_res[MAX_READDIR_ENTRIES]; |
413 |
|
|
am_node *mp; |
414 |
|
|
int retry; |
415 |
|
|
|
416 |
|
|
#ifdef DEBUG |
417 |
|
|
Debug(D_TRACE) |
418 |
|
|
plog(XLOG_DEBUG, "readdir:"); |
419 |
|
|
#endif /* DEBUG */ |
420 |
|
|
|
421 |
|
|
mp = fh_to_mp2(&argp->dir, &retry); |
422 |
|
|
if (mp == 0) { |
423 |
|
|
if (retry < 0) |
424 |
|
|
return 0; |
425 |
|
|
res.status = nfs_error(retry); |
426 |
|
|
} else { |
427 |
|
|
#ifdef DEBUG |
428 |
|
|
Debug(D_TRACE) |
429 |
|
|
plog(XLOG_DEBUG, "\treaddir(%s)", mp->am_path); |
430 |
|
|
#endif /* DEBUG */ |
431 |
|
|
res.status = nfs_error((*mp->am_mnt->mf_ops->readdir)(mp, argp->cookie, |
432 |
|
|
&res.readdirres_u.reply, e_res, argp->count)); |
433 |
|
|
mp->am_stats.s_readdir++; |
434 |
|
|
} |
435 |
|
|
|
436 |
|
|
return &res; |
437 |
|
|
} |
438 |
|
|
|
439 |
|
|
struct statfsres * |
440 |
|
|
nfsproc_statfs_2_svc(struct nfs_fh *argp, struct svc_req *rqstp) |
441 |
|
|
{ |
442 |
|
|
static statfsres res; |
443 |
|
|
am_node *mp; |
444 |
|
|
int retry; |
445 |
|
|
|
446 |
|
|
#ifdef DEBUG |
447 |
|
|
Debug(D_TRACE) |
448 |
|
|
plog(XLOG_DEBUG, "statfs:"); |
449 |
|
|
#endif /* DEBUG */ |
450 |
|
|
|
451 |
|
|
mp = fh_to_mp2(argp, &retry); |
452 |
|
|
if (mp == 0) { |
453 |
|
|
if (retry < 0) |
454 |
|
|
return 0; |
455 |
|
|
res.status = nfs_error(retry); |
456 |
|
|
} else { |
457 |
|
|
statfsokres *fp; |
458 |
|
|
#ifdef DEBUG |
459 |
|
|
Debug(D_TRACE) |
460 |
|
|
plog(XLOG_DEBUG, "\tstat_fs(%s)", mp->am_path); |
461 |
|
|
#endif /* DEBUG */ |
462 |
|
|
/* |
463 |
|
|
* just return faked up file system information |
464 |
|
|
*/ |
465 |
|
|
|
466 |
|
|
fp = &res.statfsres_u.reply; |
467 |
|
|
|
468 |
|
|
fp->tsize = 1024; |
469 |
|
|
fp->bsize = 4096; |
470 |
|
|
fp->blocks = 0; |
471 |
|
|
fp->bfree = 0; |
472 |
|
|
fp->bavail = 0; |
473 |
|
|
|
474 |
|
|
res.status = NFS_OK; |
475 |
|
|
mp->am_stats.s_statfs++; |
476 |
|
|
} |
477 |
|
|
|
478 |
|
|
return &res; |
479 |
|
|
} |