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 "../afs/param.h" /* Should be always first */
17 #include "../afs/sysincludes.h" /* Standard vendor system headers */
18 #include "../afs/afsincludes.h" /* Afs-based standard headers */
19 #include "../afs/afs_stats.h" /* statistics */
20 #include "../afs/afs_cbqueue.h"
21 #include "../afs/nfsclient.h"
22 #include "../afs/afs_osidnlc.h"
24 extern afs_rwlock_t afs_xcbhash;
26 /* Note that we don't set CDirty here, this is OK because the link
27 * RPC is called synchronously. */
31 register struct vcache *avc;
32 struct nameidata *ndp; {
33 register struct vcache *adp = (struct vcache *)ndp->ni_dvp;
34 char *aname = ndp->ni_dent.d_name;
35 struct ucred *acred = ndp->ni_cred;
36 #else /* AFS_OSF_ENV */
37 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
38 afs_link(OSI_VC_ARG(adp), avc, aname, acred)
40 afs_link(avc, OSI_VC_ARG(adp), aname, acred)
43 register struct vcache *avc;
45 struct AFS_UCRED *acred;
49 register struct dcache *tdc;
50 register afs_int32 code;
51 register struct conn *tc;
52 afs_int32 offset, len;
53 struct AFSFetchStatus OutFidStatus, OutDirStatus;
54 struct AFSVolSync tsync;
58 AFS_STATCNT(afs_link);
59 afs_Trace3(afs_iclSetp, CM_TRACE_LINK, ICL_TYPE_POINTER, adp,
60 ICL_TYPE_POINTER, avc, ICL_TYPE_STRING, aname);
61 /* create a hard link; new entry is aname in dir adp */
62 if (code = afs_InitReq(&treq, acred)) return code;
63 if (avc->fid.Cell != adp->fid.Cell || avc->fid.Fid.Volume != adp->fid.Fid.Volume) {
67 code = afs_VerifyVCache(adp, &treq);
70 /** If the volume is read-only, return error without making an RPC to the
73 if ( adp->states & CRO ) {
78 tdc = afs_GetDCache(adp, 0, &treq, &offset, &len, 1); /* test for error below */
79 ObtainWriteLock(&adp->lock,145);
81 tc = afs_Conn(&adp->fid, &treq, SHARED_LOCK);
83 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_LINK);
84 #ifdef RX_ENABLE_LOCKS
86 #endif /* RX_ENABLE_LOCKS */
87 code = RXAFS_Link(tc->id, (struct AFSFid *) &adp->fid.Fid, aname,
88 (struct AFSFid *) &avc->fid.Fid, &OutFidStatus,
89 &OutDirStatus, &tsync);
90 #ifdef RX_ENABLE_LOCKS
92 #endif /* RX_ENABLE_LOCKS */
98 (afs_Analyze(tc, code, &adp->fid, &treq,
99 AFS_STATS_FS_RPCIDX_LINK, SHARED_LOCK, (struct cell *)0));
102 if (tdc) afs_PutDCache(tdc);
104 ObtainWriteLock(&afs_xcbhash, 492);
105 afs_DequeueCallback(adp);
106 adp->states &= ~CStatd;
107 ReleaseWriteLock(&afs_xcbhash);
108 osi_dnlc_purgedp(adp);
110 ReleaseWriteLock(&adp->lock);
113 if (afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
114 /* we can do it locally */
115 code = afs_dir_Create(&tdc->f.inode, aname, &avc->fid.Fid);
117 ZapDCE(tdc); /* surprise error -- invalid value */
122 afs_PutDCache(tdc); /* drop ref count */
124 ReleaseWriteLock(&adp->lock);
125 ObtainWriteLock(&avc->lock,146); /* correct link count */
127 /* we could lock both dir and file; since we get the new fid
128 * status back, you'd think we could put it in the cache status
129 * entry at that point. Note that if we don't lock the file over
130 * the rpc call, we have no guarantee that the status info
131 * returned in ustat is the most recent to store in the file's
134 ObtainWriteLock(&afs_xcbhash, 493);
135 afs_DequeueCallback(avc);
136 avc->states &= ~CStatd; /* don't really know new link count */
137 ReleaseWriteLock(&afs_xcbhash);
138 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
139 osi_dnlc_purgedp(avc);
140 ReleaseWriteLock(&avc->lock);
144 afs_PutVCache(adp, WRITE_LOCK);
145 #endif /* AFS_OSF_ENV */
146 return afs_CheckCode(code, &treq);