2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
16 #include <afsconfig.h>
17 #include "afs/param.h"
22 #include "afs/sysincludes.h" /* Standard vendor system headers */
23 #include "afsincludes.h" /* Afs-based standard headers */
24 #include "afs/afs_stats.h" /* statistics */
25 #include "afs/afs_cbqueue.h"
26 #include "afs/nfsclient.h"
27 #include "afs/afs_osidnlc.h"
29 extern afs_rwlock_t afs_xcbhash;
31 /* Note that we don't set CDirty here, this is OK because the link
32 * RPC is called synchronously. */
35 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
36 afs_link(OSI_VC_ARG(adp), avc, aname, acred)
38 afs_link(avc, OSI_VC_ARG(adp), aname, acred)
43 struct AFS_UCRED *acred;
46 register struct dcache *tdc;
47 register afs_int32 code;
48 register struct conn *tc;
49 afs_size_t offset, len;
50 struct AFSFetchStatus OutFidStatus, OutDirStatus;
51 struct AFSVolSync tsync;
52 struct afs_fakestat_state vfakestate, dfakestate;
56 AFS_STATCNT(afs_link);
57 afs_Trace3(afs_iclSetp, CM_TRACE_LINK, ICL_TYPE_POINTER, adp,
58 ICL_TYPE_POINTER, avc, ICL_TYPE_STRING, aname);
59 /* create a hard link; new entry is aname in dir adp */
60 if ((code = afs_InitReq(&treq, acred)))
63 afs_InitFakeStat(&vfakestate);
64 afs_InitFakeStat(&dfakestate);
65 code = afs_EvalFakeStat(&avc, &vfakestate, &treq);
68 code = afs_EvalFakeStat(&adp, &dfakestate, &treq);
72 if (avc->fid.Cell != adp->fid.Cell
73 || avc->fid.Fid.Volume != adp->fid.Fid.Volume) {
77 if (strlen(aname) > AFSNAMEMAX) {
81 code = afs_VerifyVCache(adp, &treq);
85 /** If the volume is read-only, return error without making an RPC to the
88 if (adp->states & CRO) {
93 tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &offset, &len, 1); /* test for error below */
94 ObtainWriteLock(&adp->lock, 145);
96 tc = afs_Conn(&adp->fid, &treq, SHARED_LOCK);
98 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_LINK);
101 RXAFS_Link(tc->id, (struct AFSFid *)&adp->fid.Fid, aname,
102 (struct AFSFid *)&avc->fid.Fid, &OutFidStatus,
103 &OutDirStatus, &tsync);
110 (tc, code, &adp->fid, &treq, AFS_STATS_FS_RPCIDX_LINK,
117 ObtainWriteLock(&afs_xcbhash, 492);
118 afs_DequeueCallback(adp);
119 adp->states &= ~CStatd;
120 ReleaseWriteLock(&afs_xcbhash);
121 osi_dnlc_purgedp(adp);
123 ReleaseWriteLock(&adp->lock);
127 ObtainWriteLock(&tdc->lock, 635);
128 if (afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
129 /* we can do it locally */
130 ObtainWriteLock(&afs_xdcache, 290);
131 code = afs_dir_Create(tdc, aname, &avc->fid.Fid);
132 ReleaseWriteLock(&afs_xdcache);
134 ZapDCE(tdc); /* surprise error -- invalid value */
139 ReleaseWriteLock(&tdc->lock);
140 afs_PutDCache(tdc); /* drop ref count */
142 ReleaseWriteLock(&adp->lock);
143 ObtainWriteLock(&avc->lock, 146); /* correct link count */
145 /* we could lock both dir and file; since we get the new fid
146 * status back, you'd think we could put it in the cache status
147 * entry at that point. Note that if we don't lock the file over
148 * the rpc call, we have no guarantee that the status info
149 * returned in ustat is the most recent to store in the file's
152 ObtainWriteLock(&afs_xcbhash, 493);
153 afs_DequeueCallback(avc);
154 avc->states &= ~CStatd; /* don't really know new link count */
155 ReleaseWriteLock(&afs_xcbhash);
156 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
157 osi_dnlc_purgedp(avc);
158 ReleaseWriteLock(&avc->lock);
161 code = afs_CheckCode(code, &treq, 24);
162 afs_PutFakeStat(&vfakestate);
163 afs_PutFakeStat(&dfakestate);