static int UnEvalFakeStat(struct vrequest *areq, struct vcache **vcpp)
{
struct VenusFid tfid;
struct volume *tvp;
struct vcache *tvc;
int code;
if (!afs_fakestat_enable)
return 0;
if (*vcpp == afs_globalVp || vType(*vcpp) != VDIR || (*vcpp)->mvstat != 2)
return 0;
/* Figure out what FID to look for */
tvp = afs_GetVolume(&(*vcpp)->f.fid, 0, READ_LOCK);
if (!tvp) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: UnEvalFakeStat(0x%08x/%d/%d.%d): no volume\n",
(*vcpp)->f.fid.Cell, (*vcpp)->f.fid.Fid.Volume,
(*vcpp)->f.fid.Fid.Vnode, (*vcpp)->f.fid.Fid.Unique);
#endif
return ENOENT;
}
tfid = tvp->mtpoint;
afs_PutVolume(tvp, READ_LOCK);
tvc = afs_GetVCache(&tfid, areq, NULL, NULL);
if (!tvc) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: UnEvalFakeStat(0x%08x/%d/%d.%d): GetVCache(0x%08x/%d/%d.%d) failed\n",
(*vcpp)->f.fid.Cell, (*vcpp)->f.fid.Fid.Volume,
(*vcpp)->f.fid.Fid.Vnode, (*vcpp)->f.fid.Fid.Unique,
tfid.Cell, tfid.Fid.Volume,
tfid.Fid.Vnode, tfid.Fid.Unique);
#endif
return ENOENT;
}
if (afs_fakestat_enable == 2) {
ObtainWriteLock(&tvc->lock, 806);
code = afs_HandleLink(tvc, areq);
if (code) {
ReleaseWriteLock(&tvc->lock);
afs_PutVCache(tvc);
return code;
}
if (!strchr(tvc->linkData, ':')) {
ReleaseWriteLock(&tvc->lock);
afs_PutVCache(tvc);
return 0;
}
ReleaseWriteLock(&tvc->lock);
}
afs_PutVCache(*vcpp);
*vcpp = tvc;
return 0;
}
int
afs_readlink(OSI_VC_DECL(avc), struct uio *auio, afs_ucred_t *acred)
{
afs_int32 code;
struct vrequest *treq = NULL;
char *tp;
struct afs_fakestat_state fakestat;
OSI_VC_CONVERT(avc);
AFS_STATCNT(afs_readlink);
afs_Trace1(afs_iclSetp, CM_TRACE_READLINK, ICL_TYPE_POINTER, avc);
if ((code = afs_CreateReq(&treq, acred)))
return code;
afs_InitFakeStat(&fakestat);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&avc, &fakestat, treq);
if (code)
goto done;
code = afs_VerifyVCache(avc, treq);
if (code)
goto done;
if (vType(avc) != VLNK) {
code = EINVAL;
goto done;
}
ObtainWriteLock(&avc->lock, 158);
code = afs_HandleLink(avc, treq);
/* finally uiomove it to user-land */
if (code == 0) {
tp = avc->linkData;
if (tp)
AFS_UIOMOVE(tp, strlen(tp), UIO_READ, auio, code);
else {
code = EIO;
}
}
ReleaseWriteLock(&avc->lock);
done:
afs_PutFakeStat(&fakestat);
AFS_DISCON_UNLOCK();
code = afs_CheckCode(code, treq, 32);
afs_DestroyReq(treq);
return code;
}