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 "../afs/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. */
35 register struct vcache *avc;
36 struct nameidata *ndp; {
37 register 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)
47 register struct vcache *avc;
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;
62 AFS_STATCNT(afs_link);
63 afs_Trace3(afs_iclSetp, CM_TRACE_LINK, ICL_TYPE_POINTER, adp,
64 ICL_TYPE_POINTER, avc, ICL_TYPE_STRING, aname);
65 /* create a hard link; new entry is aname in dir adp */
66 if (code = afs_InitReq(&treq, acred))
69 if (avc->fid.Cell != adp->fid.Cell || avc->fid.Fid.Volume != adp->fid.Fid.Volume) {
73 if (strlen(aname) > AFSNAMEMAX) {
77 code = afs_VerifyVCache(adp, &treq);
80 /** If the volume is read-only, return error without making an RPC to the
83 if ( adp->states & CRO ) {
88 tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &offset, &len, 1); /* test for error below */
89 ObtainWriteLock(&adp->lock,145);
91 tc = afs_Conn(&adp->fid, &treq, SHARED_LOCK);
93 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_LINK);
94 #ifdef RX_ENABLE_LOCKS
96 #endif /* RX_ENABLE_LOCKS */
97 code = RXAFS_Link(tc->id, (struct AFSFid *) &adp->fid.Fid, aname,
98 (struct AFSFid *) &avc->fid.Fid, &OutFidStatus,
99 &OutDirStatus, &tsync);
100 #ifdef RX_ENABLE_LOCKS
102 #endif /* RX_ENABLE_LOCKS */
108 (afs_Analyze(tc, code, &adp->fid, &treq,
109 AFS_STATS_FS_RPCIDX_LINK, SHARED_LOCK, (struct cell *)0));
112 if (tdc) afs_PutDCache(tdc);
114 ObtainWriteLock(&afs_xcbhash, 492);
115 afs_DequeueCallback(adp);
116 adp->states &= ~CStatd;
117 ReleaseWriteLock(&afs_xcbhash);
118 osi_dnlc_purgedp(adp);
120 ReleaseWriteLock(&adp->lock);
123 if (tdc) ObtainWriteLock(&tdc->lock, 635);
124 if (afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
125 /* we can do it locally */
126 code = afs_dir_Create(&tdc->f.inode, aname, &avc->fid.Fid);
128 ZapDCE(tdc); /* surprise error -- invalid value */
133 ReleaseWriteLock(&tdc->lock);
134 afs_PutDCache(tdc); /* drop ref count */
136 ReleaseWriteLock(&adp->lock);
137 ObtainWriteLock(&avc->lock,146); /* correct link count */
139 /* we could lock both dir and file; since we get the new fid
140 * status back, you'd think we could put it in the cache status
141 * entry at that point. Note that if we don't lock the file over
142 * the rpc call, we have no guarantee that the status info
143 * returned in ustat is the most recent to store in the file's
146 ObtainWriteLock(&afs_xcbhash, 493);
147 afs_DequeueCallback(avc);
148 avc->states &= ~CStatd; /* don't really know new link count */
149 ReleaseWriteLock(&afs_xcbhash);
150 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
151 osi_dnlc_purgedp(avc);
152 ReleaseWriteLock(&avc->lock);
155 code = afs_CheckCode(code, &treq, 24);
158 afs_PutVCache(adp, WRITE_LOCK);
159 #endif /* AFS_OSF_ENV */