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"
21 #include "afs/sysincludes.h" /* Standard vendor system headers */
22 #include "afsincludes.h" /* Afs-based standard headers */
23 #include "afs/afs_stats.h" /* statistics */
24 #include "afs/afs_cbqueue.h"
25 #include "afs/nfsclient.h"
26 #include "afs/afs_osidnlc.h"
28 extern afs_rwlock_t afs_xcbhash;
30 /* Note that we don't set CDirty here, this is OK because the link
31 * RPC is called synchronously. */
36 struct nameidata *ndp; {
37 struct vcache *adp = VTOAFS(ndp->ni_dvp);
38 char *aname = ndp->ni_dent.d_name;
39 struct ucred *acred = ndp->ni_cred;
40 #else /* AFS_OSF_ENV */
41 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
42 afs_link(OSI_VC_ARG(adp), avc, aname, acred)
44 afs_link(avc, OSI_VC_ARG(adp), aname, acred)
49 struct AFS_UCRED *acred;
53 register struct dcache *tdc;
54 register afs_int32 code;
55 register struct conn *tc;
56 afs_size_t offset, len;
57 struct AFSFetchStatus OutFidStatus, OutDirStatus;
58 struct AFSVolSync tsync;
59 struct afs_fakestat_state vfakestate, dfakestate;
63 AFS_STATCNT(afs_link);
64 afs_Trace3(afs_iclSetp, CM_TRACE_LINK, ICL_TYPE_POINTER, adp,
65 ICL_TYPE_POINTER, avc, ICL_TYPE_STRING, aname);
66 /* create a hard link; new entry is aname in dir adp */
67 if ((code = afs_InitReq(&treq, acred)))
70 afs_InitFakeStat(&vfakestate);
71 afs_InitFakeStat(&dfakestate);
72 code = afs_EvalFakeStat(&avc, &vfakestate, &treq);
74 code = afs_EvalFakeStat(&adp, &dfakestate, &treq);
77 if (avc->fid.Cell != adp->fid.Cell || avc->fid.Fid.Volume != adp->fid.Fid.Volume) {
81 if (strlen(aname) > AFSNAMEMAX) {
85 code = afs_VerifyVCache(adp, &treq);
88 /** If the volume is read-only, return error without making an RPC to the
91 if ( adp->states & CRO ) {
96 tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &offset, &len, 1); /* test for error below */
97 ObtainWriteLock(&adp->lock,145);
99 tc = afs_Conn(&adp->fid, &treq, SHARED_LOCK);
101 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_LINK);
103 code = RXAFS_Link(tc->id, (struct AFSFid *) &adp->fid.Fid, aname,
104 (struct AFSFid *) &avc->fid.Fid, &OutFidStatus,
105 &OutDirStatus, &tsync);
112 (afs_Analyze(tc, code, &adp->fid, &treq,
113 AFS_STATS_FS_RPCIDX_LINK, SHARED_LOCK, NULL));
116 if (tdc) afs_PutDCache(tdc);
118 ObtainWriteLock(&afs_xcbhash, 492);
119 afs_DequeueCallback(adp);
120 adp->states &= ~CStatd;
121 ReleaseWriteLock(&afs_xcbhash);
122 osi_dnlc_purgedp(adp);
124 ReleaseWriteLock(&adp->lock);
127 if (tdc) ObtainWriteLock(&tdc->lock, 635);
128 if (afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
129 /* we can do it locally */
130 code = afs_dir_Create(&tdc->f.inode, aname, &avc->fid.Fid);
132 ZapDCE(tdc); /* surprise error -- invalid value */
137 ReleaseWriteLock(&tdc->lock);
138 afs_PutDCache(tdc); /* drop ref count */
140 ReleaseWriteLock(&adp->lock);
141 ObtainWriteLock(&avc->lock,146); /* correct link count */
143 /* we could lock both dir and file; since we get the new fid
144 * status back, you'd think we could put it in the cache status
145 * entry at that point. Note that if we don't lock the file over
146 * the rpc call, we have no guarantee that the status info
147 * returned in ustat is the most recent to store in the file's
150 ObtainWriteLock(&afs_xcbhash, 493);
151 afs_DequeueCallback(avc);
152 avc->states &= ~CStatd; /* don't really know new link count */
153 ReleaseWriteLock(&afs_xcbhash);
154 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
155 osi_dnlc_purgedp(avc);
156 ReleaseWriteLock(&avc->lock);
159 code = afs_CheckCode(code, &treq, 24);
160 afs_PutFakeStat(&vfakestate);
161 afs_PutFakeStat(&dfakestate);
165 #endif /* AFS_OSF_ENV */