bool
ZXmlParser::SetTextValue( LPCTSTR TextValue )
{
// Nodes members
// IXMLDOMElementPtr m_CurrentNode; /* Global Member */
IXMLDOMNodePtr newNode;
// Find if a CHILD TEXT NODE exist or not
if ( m_CurrentNode == NULL )
{
if ( m_pDocRoot )
m_CurrentNode = m_pDocRoot;
else
{
m_LastError = "ZXmlParser::SetTextValue( LPCTSTR ) : Can't set a Text on a NULL Node";
return( false );
}
}
if ( IsMSXML_Node( m_CurrentNode ) == NODE_CDATA_SECTION )
{
CComVariant sValue( TextValue );
m_CurrentNode->put_nodeValue( sValue );
return( true );
}
// Rq: a NODE_CDATA_SECTION can't have any childs
if ( m_CurrentNode->hasChildNodes( ) )
{
IXMLDOMNodePtr pChild;
for( pChild = m_CurrentNode->firstChild; pChild; pChild = pChild->nextSibling )
{
// Find it's a NODE TEXT
if ( IsMSXML_Node( pChild ) == NODE_TEXT )
{
// A Text Node is found, Replace it now!!
CComVariant sValue( TextValue );
pChild->put_nodeValue( sValue );
return( true );
}
}
}
// No previous Text was defined before, we can add it.
if ( IsMSXML_Node( m_CurrentNode ) == NODE_ELEMENT )
{
// Create NODE TEXT type
CComVariant vType( MSXML2::NODE_TEXT );
// Create the node
newNode = m_plDomDocument->createTextNode( TextValue );
// Attach the Node to the document
newNode = m_CurrentNode->appendChild( newNode );
}
return( true );
}
/* afs_FlushServerCBs
* to be used only in dire circumstances, this drops all callbacks on
* the floor for a specific server, without giving them back to the server.
* It's ok, the server can deal with it, but it is a little bit rude.
*/
void
afs_FlushServerCBs(struct server *srvp)
{
register int i;
register struct vcache *tvc;
ObtainWriteLock(&afs_xcbhash, 86); /* pretty likely I'm going to remove something */
for (i = 0; i < VCSIZE; i++) { /* reset all the vnodes */
for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
if (tvc->callback == srvp) {
tvc->callback = 0;
tvc->dchint = NULL; /* invalidate hints */
tvc->f.states &= ~(CStatd);
if (!(tvc->f.states & (CVInit|CVFlushed)) &&
((tvc->f.fid.Fid.Vnode & 1) || (vType(tvc) == VDIR))) {
osi_dnlc_purgedp(tvc);
}
afs_DequeueCallback(tvc);
}
}
}
ReleaseWriteLock(&afs_xcbhash);
}
bool
ZXmlParser::AddFirstChildCData( LPCTSTR data )
{
// Nodes members
IXMLDOMNodePtr newNode;
// If no child then use Add_LastChildCData or CurrentElement node not set yet
//
if ( m_CurrentNode )
{
if ( !m_CurrentNode->hasChildNodes( ) )
return( AddLastChildCData( data ) );
}
else
return( AddLastChildCData( data ) );
// Create the NODE
CComVariant vType( MSXML2::NODE_CDATA_SECTION );
newNode = m_plDomDocument->createNode( vType, "", "" );
bool Result = _add_firstchild( newNode );
SetTextValue( data );
return( Result );
}
bool
ZXmlParser::AddFirstChildNode( LPCTSTR Name )
{
// Nodes members
// IXMLDOMElementPtr m_CurrentNode; /* Global Member */
//
IXMLDOMNodePtr newNode;
//IXMLDOMNodeListPtr ChildList;
// If no child then use AddLastChildNode or CurrentElement node not set yet
if ( m_CurrentNode )
{
if ( !m_CurrentNode->hasChildNodes( ) )
return( AddLastChildNode( Name ) );
}
else
return( AddLastChildNode( Name ) );
// Create NODE TYPE
CComVariant vType( MSXML2::NODE_ELEMENT );
// Create the NODE
newNode = m_plDomDocument->createNode( vType, Name, "" );
return( _add_firstchild( newNode ) );
}
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;
}
bool
ZXmlParser::AddLastChildCData( LPCTSTR data )
{
// Nodes members
IXMLDOMNodePtr newNode;
CComVariant vType( MSXML2::NODE_CDATA_SECTION );
newNode = m_plDomDocument->createNode( vType, "", "" );
// Attach the Node to the document
bool Result = _add_lastchild( newNode );
SetTextValue( data );
return( Result );
}
bool
ZXmlParser::AddLastChildNode( LPCTSTR Name )
{
// Nodes members
IXMLDOMNodePtr newNode;
// Create NODE TYPE
CComVariant vType( MSXML2::NODE_ELEMENT );
// Create the NODE
newNode = m_plDomDocument->createNode( vType, Name, "" );
// Attach the Node to the document
return( _add_lastchild( newNode ) );
}
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;
}
bool
ZXmlParser::AddNodeBefore( LPCTSTR Name )
{
// Nodes members
// IXMLDOMElementPtr m_CurrentNode; /* Global Member */
IXMLDOMNodePtr newNode;
// Can't use this function on the root node
if ( IsRoot( ) )
return( false );
// Create NODE TYPE
CComVariant vType( MSXML2::NODE_ELEMENT );
// Create the NODE
newNode = m_plDomDocument->createNode( vType, Name, "" );
return( _add_before( newNode ) );
}
bool
ZXmlParser::AddCDataBefore( LPCTSTR data )
{
// Nodes members
// IXMLDOMElementPtr m_CurrentNode; /* Global Member */
IXMLDOMNodePtr newNode;
// Can't use this function on the root node
if ( IsRoot( ) )
return( false );
// Create the NODE
CComVariant vType( MSXML2::NODE_CDATA_SECTION );
newNode = m_plDomDocument->createNode( vType, "", "" );
bool Result = _add_before( newNode );
SetTextValue( data );
return( Result );
}
bool
ZXmlParser::AddCDataAfter( LPCTSTR data )
{
// Nodes members
IXMLDOMNodePtr newNode;
// Can't use this function on the root node
if ( IsRoot( ) )
{
m_LastError = "ZXmlParser::Add_CDataAfter( LPCTSTR ) : Can't add node at same level that the root node";
return( false );
}
// Create the NODE
CComVariant vType( MSXML2::NODE_CDATA_SECTION );
newNode = m_plDomDocument->createNode( vType, "", "" );
bool Result = _add_after( newNode );
SetTextValue( data );
return( Result );
}
bool
ZXmlParser::AddNodeAfter( LPCTSTR Name )
{
// Nodes members
// IXMLDOMElementPtr m_CurrentNode; /* Global Member */
IXMLDOMNodePtr newNode;
// Can't use this function on the root node
if ( IsRoot( ) )
{
m_LastError = "ZXmlParser::AddNodeAfter( LPCTSTR ) : Can't add node at same level that the root node";
return( false );
}
// Create NODE TYPE
CComVariant vType( MSXML2::NODE_ELEMENT );
// Create the NODE
newNode = m_plDomDocument->createNode( vType, Name, "" );
return( _add_after( newNode ) );
}
/* afs_FlushCBs
* to be used only in dire circumstances, this drops all callbacks on
* the floor, without giving them back to the server. It's ok, the server can
* deal with it, but it is a little bit rude.
*/
void
afs_FlushCBs(void)
{
register int i;
register struct vcache *tvc;
ObtainWriteLock(&afs_xcbhash, 86); /* pretty likely I'm going to remove something */
for (i = 0; i < VCSIZE; i++) /* reset all the vnodes */
for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
tvc->callback = 0;
tvc->dchint = NULL; /* invalidate hints */
tvc->f.states &= ~(CStatd);
if (QPrev(&(tvc->callsort)))
QRemove(&(tvc->callsort));
if (!(tvc->f.states & (CVInit|CVFlushed)) &&
((tvc->f.fid.Fid.Vnode & 1) || (vType(tvc) == VDIR)))
osi_dnlc_purgedp(tvc);
}
afs_InitCBQueue(0);
ReleaseWriteLock(&afs_xcbhash);
}
/*!
* Get a the dir's fid by looking in the vcache for simple files and
* in the ".." entry for directories.
*
* \param avc The file's vhash entry.
* \param afid Put the fid here.
*
* \return 0 on success, -1 on failure
*/
int
afs_GetParentDirFid(struct vcache *avc, struct VenusFid *afid)
{
struct dcache *tdc;
afid->Cell = avc->f.fid.Cell;
afid->Fid.Volume = avc->f.fid.Fid.Volume;
switch (vType(avc)) {
case VREG:
case VLNK:
/* Normal files have the dir fid embedded in the vcache. */
afid->Fid.Vnode = avc->f.parent.vnode;
afid->Fid.Unique = avc->f.parent.unique;
break;
case VDIR:
/* If dir or parent dir created locally*/
tdc = afs_FindDCacheByFid(&avc->f.fid);
if (tdc) {
afid->Fid.Unique = 0;
/* Lookup each entry for the fid. It should be the first. */
afs_dir_EnumerateDir(tdc, &get_parent_dir_fid_hook, afid);
afs_PutDCache(tdc);
if (afid->Fid.Unique == 0) {
return -1;
}
} else {
return -1;
}
break;
default:
return -1;
}
return 0;
}
afs_open(struct vcache **avcp, afs_int32 aflags, afs_ucred_t *acred)
#endif
{
afs_int32 code;
struct vrequest treq;
struct vcache *tvc;
int writing;
struct afs_fakestat_state fakestate;
AFS_STATCNT(afs_open);
if ((code = afs_InitReq(&treq, acred)))
return code;
#ifdef AFS_SGI64_ENV
/* avcpp can be, but is not necesarily, bhp's vnode. */
tvc = VTOAFS(BHV_TO_VNODE(bhv));
#else
tvc = *avcp;
#endif
afs_Trace2(afs_iclSetp, CM_TRACE_OPEN, ICL_TYPE_POINTER, tvc,
ICL_TYPE_INT32, aflags);
afs_InitFakeStat(&fakestate);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&tvc, &fakestate, &treq);
if (code)
goto done;
code = afs_VerifyVCache(tvc, &treq);
if (code)
goto done;
ObtainReadLock(&tvc->lock);
if (AFS_IS_DISCONNECTED && (afs_DCacheMissingChunks(tvc) != 0)) {
ReleaseReadLock(&tvc->lock);
/* printf("Network is down in afs_open: missing chunks\n"); */
code = ENETDOWN;
goto done;
}
ReleaseReadLock(&tvc->lock);
if (aflags & (FWRITE | FTRUNC))
writing = 1;
else
writing = 0;
if (vType(tvc) == VDIR) {
/* directory */
if (writing) {
code = EISDIR;
goto done;
} else {
if (!afs_AccessOK
(tvc, ((tvc->f.states & CForeign) ? PRSFS_READ : PRSFS_LOOKUP),
&treq, CHECK_MODE_BITS)) {
code = EACCES;
/* printf("afs_Open: no access for dir\n"); */
goto done;
}
}
} else {
#ifdef AFS_SUN5_ENV
if (AFS_NFSXLATORREQ(acred) && (aflags & FREAD)) {
if (!afs_AccessOK
(tvc, PRSFS_READ, &treq,
CHECK_MODE_BITS | CMB_ALLOW_EXEC_AS_READ)) {
code = EACCES;
goto done;
}
}
#endif
#ifdef AFS_AIX41_ENV
if (aflags & FRSHARE) {
/*
* Hack for AIX 4.1:
* Apparently it is possible for a file to get mapped without
* either VNOP_MAP or VNOP_RDWR being called, if (1) it is a
* sharable library, and (2) it has already been loaded. We must
* ensure that the credp is up to date. We detect the situation
* by checking for O_RSHARE at open time.
*/
/*
* We keep the caller's credentials since an async daemon will
* handle the request at some point. We assume that the same
* credentials will be used.
*/
ObtainWriteLock(&tvc->lock, 140);
if (!tvc->credp || (tvc->credp != acred)) {
crhold(acred);
if (tvc->credp) {
struct ucred *crp = tvc->credp;
tvc->credp = NULL;
crfree(crp);
}
tvc->credp = acred;
}
ReleaseWriteLock(&tvc->lock);
}
#endif
/* normal file or symlink */
osi_FlushText(tvc); /* only needed to flush text if text locked last time */
#ifdef AFS_BOZONLOCK_ENV
afs_BozonLock(&tvc->pvnLock, tvc);
#endif
osi_FlushPages(tvc, acred);
#ifdef AFS_BOZONLOCK_ENV
afs_BozonUnlock(&tvc->pvnLock, tvc);
#endif
}
/* set date on file if open in O_TRUNC mode */
if (aflags & FTRUNC) {
/* this fixes touch */
ObtainWriteLock(&tvc->lock, 123);
tvc->f.m.Date = osi_Time();
tvc->f.states |= CDirty;
ReleaseWriteLock(&tvc->lock);
}
ObtainReadLock(&tvc->lock);
if (writing)
tvc->execsOrWriters++;
tvc->opens++;
#if defined(AFS_SGI_ENV) || defined (AFS_LINUX26_ENV)
if (writing && tvc->cred == NULL) {
crhold(acred);
tvc->cred = acred;
}
#endif
ReleaseReadLock(&tvc->lock);
if ((afs_preCache != 0) && (writing == 0) && (vType(tvc) != VDIR) &&
(!afs_BBusy())) {
struct dcache *tdc;
afs_size_t offset, len;
tdc = afs_GetDCache(tvc, 0, &treq, &offset, &len, 1);
ObtainSharedLock(&tdc->mflock, 865);
if (!(tdc->mflags & DFFetchReq)) {
struct brequest *bp;
/* start the daemon (may already be running, however) */
UpgradeSToWLock(&tdc->mflock, 666);
tdc->mflags |= DFFetchReq; /* guaranteed to be cleared by BKG or
GetDCache */
/* last parm (1) tells bkg daemon to do an afs_PutDCache when it
is done, since we don't want to wait for it to finish before
doing so ourselves.
*/
bp = afs_BQueue(BOP_FETCH, tvc, B_DONTWAIT, 0, acred,
(afs_size_t) 0, (afs_size_t) 1, tdc,
(void *)0, (void *)0);
if (!bp) {
tdc->mflags &= ~DFFetchReq;
}
ReleaseWriteLock(&tdc->mflock);
} else {
ReleaseSharedLock(&tdc->mflock);
}
}
done:
afs_PutFakeStat(&fakestate);
AFS_DISCON_UNLOCK();
code = afs_CheckCode(code, &treq, 4); /* avoid AIX -O bug */
afs_Trace2(afs_iclSetp, CM_TRACE_OPEN, ICL_TYPE_POINTER, tvc,
ICL_TYPE_INT32, 999999);
return code;
}
/* copy out attributes from cache entry */
int
afs_CopyOutAttrs(struct vcache *avc, struct vattr *attrs)
{
struct volume *tvp;
struct cell *tcell;
#if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
struct vnode *vp = AFSTOV(avc);
#endif
int fakedir = 0;
AFS_STATCNT(afs_CopyOutAttrs);
if (afs_fakestat_enable && avc->mvstat == AFS_MVSTAT_MTPT)
fakedir = 1;
attrs->va_type = fakedir ? VDIR : vType(avc);
#if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_DARWIN_ENV)
attrs->va_mode = fakedir ? S_IFDIR | 0755 : (mode_t) (avc->f.m.Mode & 0xffff);
#else
attrs->va_mode = fakedir ? VDIR | 0755 : avc->f.m.Mode;
#endif
if (avc->f.m.Mode & (VSUID | VSGID)) {
/* setuid or setgid, make sure we're allowed to run them from this cell */
tcell = afs_GetCell(avc->f.fid.Cell, 0);
if (tcell && (tcell->states & CNoSUID))
attrs->va_mode &= ~(VSUID | VSGID);
}
#if defined(AFS_DARWIN_ENV)
{
if (!afs_darwin_realmodes) {
/* Mac OS X uses the mode bits to determine whether a file or
* directory is accessible, and believes them, even though under
* AFS they're almost assuredly wrong, especially if the local uid
* does not match the AFS ID. So we set the mode bits
* conservatively.
*/
if (S_ISDIR(attrs->va_mode)) {
/* all access bits need to be set for directories, since even
* a mode 0 directory can still be used normally.
*/
attrs->va_mode |= ACCESSPERMS;
} else {
/* for other files, replicate the user bits to group and other */
mode_t ubits = (attrs->va_mode & S_IRWXU) >> 6;
attrs->va_mode |= ubits | (ubits << 3);
}
}
}
#endif /* AFS_DARWIN_ENV */
attrs->va_uid = fakedir ? 0 : avc->f.m.Owner;
attrs->va_gid = fakedir ? 0 : avc->f.m.Group; /* yeah! */
#if defined(AFS_SUN5_ENV)
attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
#elif defined(AFS_DARWIN80_ENV)
VATTR_RETURN(attrs, va_fsid, vfs_statfs(vnode_mount(AFSTOV(avc)))->f_fsid.val[0]);
#elif defined(AFS_DARWIN_ENV)
attrs->va_fsid = avc->v->v_mount->mnt_stat.f_fsid.val[0];
#else /* ! AFS_DARWIN_ENV */
attrs->va_fsid = 1;
#endif
if (avc->mvstat == AFS_MVSTAT_ROOT) {
tvp = afs_GetVolume(&avc->f.fid, 0, READ_LOCK);
/* The mount point's vnode. */
if (tvp) {
attrs->va_nodeid =
afs_calc_inum(tvp->mtpoint.Cell,
tvp->mtpoint.Fid.Volume,
tvp->mtpoint.Fid.Vnode);
if (FidCmp(&afs_rootFid, &avc->f.fid) && !attrs->va_nodeid)
attrs->va_nodeid = 2;
afs_PutVolume(tvp, READ_LOCK);
} else
attrs->va_nodeid = 2;
} else
attrs->va_nodeid =
afs_calc_inum(avc->f.fid.Cell,
avc->f.fid.Fid.Volume,
avc->f.fid.Fid.Vnode);
attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
attrs->va_nlink = fakedir ? 100 : avc->f.m.LinkCount;
attrs->va_size = fakedir ? 4096 : avc->f.m.Length;
#if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
vnode_pager_setsize(vp, (u_long) attrs->va_size);
#endif
attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
fakedir ? 0 : (int)avc->f.m.Date;
/* set microseconds to be dataversion # so that we approximate NFS-style
* use of mtime as a dataversion #. We take it mod 512K because
* microseconds *must* be less than a million, and 512K is the biggest
* power of 2 less than such. DataVersions are typically pretty small
* anyway, so the difference between 512K and 1000000 shouldn't matter
* much, and "&" is a lot faster than "%".
*/
#if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
/* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
* dataversion) in va_gen */
attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
attrs->va_ctime.tv_nsec = 0;
attrs->va_gen = hgetlo(avc->f.m.DataVersion);
#elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV) || defined(AFS_NBSD_ENV)
attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
attrs->va_ctime.tv_nsec =
(hgetlo(avc->f.m.DataVersion) & 0x7ffff) * 1000;
#else
attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
attrs->va_ctime.tv_usec = (hgetlo(avc->f.m.DataVersion) & 0x7ffff);
#endif
#if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
attrs->va_flags = 0;
#endif
#if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
attrs->va_blksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
#else
attrs->va_blocksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
#endif
attrs->va_rdev = 1;
#if defined(AFS_HPUX110_ENV)
if (afs_globalVFS)
attrs->va_fstype = afs_globalVFS->vfs_mtype;
#endif
/*
* Below return 0 (and not 1) blocks if the file is zero length. This conforms
* better with the other filesystems that do return 0.
*/
#if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
attrs->va_bytes = (attrs->va_size ? (attrs->va_size + 1023) : 1024);
#ifdef va_bytes_rsv
attrs->va_bytes_rsv = -1;
#endif
#elif defined(AFS_HPUX_ENV)
attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10) : 0);
#elif defined(AFS_SGI_ENV)
attrs->va_blocks = BTOBB(attrs->va_size);
#elif defined(AFS_SUN5_ENV)
attrs->va_nblocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
#else /* everything else */
attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
#endif
return 0;
}
void
afs_CheckCallbacks(unsigned int secs)
{
struct vcache *tvc;
register struct afs_q *tq;
struct afs_q *uq;
afs_uint32 now;
struct volume *tvp;
register int safety;
ObtainWriteLock(&afs_xcbhash, 85); /* pretty likely I'm going to remove something */
now = osi_Time();
for (safety = 0, tq = cbHashT[base].head.prev;
(safety <= CBQ_LIMIT) && (tq != &(cbHashT[base].head));
tq = uq, safety++) {
uq = QPrev(tq);
tvc = CBQTOV(tq);
if (tvc->cbExpires < now + secs) { /* race #1 here */
/* Get the volume, and if its callback expiration time is more than secs
* seconds into the future, update this vcache entry and requeue it below
*/
if ((tvc->f.states & CRO)
&& (tvp = afs_FindVolume(&(tvc->f.fid), READ_LOCK))) {
if (tvp->expireTime > now + secs) {
tvc->cbExpires = tvp->expireTime; /* XXX race here */
} else {
int i;
for (i = 0; i < MAXHOSTS && tvp->serverHost[i]; i++) {
if (!(tvp->serverHost[i]->flags & SRVR_ISDOWN)) {
/* What about locking xvcache or vrefcount++ or
* write locking tvc? */
QRemove(tq);
tvc->f.states &= ~(CStatd | CMValid | CUnique);
if (!(tvc->f.states & (CVInit|CVFlushed)) &&
(tvc->f.fid.Fid.Vnode & 1 ||
(vType(tvc) == VDIR)))
osi_dnlc_purgedp(tvc);
tvc->dchint = NULL; /*invalidate em */
afs_ResetVolumeInfo(tvp);
break;
}
}
}
afs_PutVolume(tvp, READ_LOCK);
} else {
/* Do I need to worry about things like execsorwriters?
* What about locking xvcache or vrefcount++ or write locking tvc?
*/
QRemove(tq);
tvc->f.states &= ~(CStatd | CMValid | CUnique);
if (!(tvc->f.states & (CVInit|CVFlushed)) &&
(tvc->f.fid.Fid.Vnode & 1 || (vType(tvc) == VDIR)))
osi_dnlc_purgedp(tvc);
}
}
if ((tvc->cbExpires > basetime) && CBHash(tvc->cbExpires - basetime)) {
/* it's been renewed on us. Have to be careful not to put it back
* into this slot, or we may never get out of here.
*/
int slot;
slot = (CBHash(tvc->cbExpires - basetime) + base) % CBHTSIZE;
if (slot != base) {
if (QPrev(tq))
QRemove(&(tvc->callsort));
QAdd(&(cbHashT[slot].head), &(tvc->callsort));
/* XXX remember to update volume expiration time */
/* -- not needed for correctness, though */
}
}
}
if (safety > CBQ_LIMIT) {
afs_stats_cmperf.cbloops++;
if (afs_paniconwarn)
osi_Panic("CheckCallbacks");
afs_warn
("AFS Internal Error (minor): please contact AFS Product Support.\n");
ReleaseWriteLock(&afs_xcbhash);
afs_FlushCBs();
return;
} else
ReleaseWriteLock(&afs_xcbhash);
/* XXX future optimization:
if this item has been recently accessed, queue up a stat for it.
{
struct dcache * adc;
ObtainReadLock(&afs_xdcache);
if ((adc = tvc->quick.dc) && (adc->stamp == tvc->quick.stamp)
&& (afs_indexTimes[adc->index] > afs_indexCounter - 20)) {
queue up the stat request
}
ReleaseReadLock(&afs_xdcache);
}
*/
return;
} /* afs_CheckCallback */
/* this call, unlike osi_FlushText, is supposed to discard caches that may
contain invalid information if a file is written remotely, but that may
contain valid information that needs to be written back if the file is
being written locally. It doesn't subsume osi_FlushText, since the latter
function may be needed to flush caches that are invalidated by local writes.
avc->pvnLock is already held, avc->lock is guaranteed not to be held (by
us, of course).
*/
void
osi_FlushPages(struct vcache *avc, afs_ucred_t *credp)
{
afs_hyper_t origDV;
#if defined(AFS_CACHE_BYPASS)
/* The optimization to check DV under read lock below is identical a
* change in CITI cache bypass work. The problem CITI found in 1999
* was that this code and background daemon doing prefetching competed
* for the vcache entry shared lock. It's not clear to me from the
* tech report, but it looks like CITI fixed the general prefetch code
* path as a bonus when experimenting on prefetch for cache bypass, see
* citi-tr-01-3.
*/
#endif
if (vType(avc) == VDIR) {
/* not applicable to directories; they're never mapped or stored in
* pages */
return;
}
ObtainReadLock(&avc->lock);
/* If we've already purged this version, or if we're the ones
* writing this version, don't flush it (could lose the
* data we're writing). */
if ((hcmp((avc->f.m.DataVersion), (avc->mapDV)) <= 0)
|| ((avc->execsOrWriters > 0) && afs_DirtyPages(avc))) {
ReleaseReadLock(&avc->lock);
return;
}
ReleaseReadLock(&avc->lock);
ObtainWriteLock(&avc->lock, 10);
/* Check again */
if ((hcmp((avc->f.m.DataVersion), (avc->mapDV)) <= 0)
|| ((avc->execsOrWriters > 0) && afs_DirtyPages(avc))) {
ReleaseWriteLock(&avc->lock);
return;
}
/* At this point, you might think that we can skip trying to flush pages
* if mapDV is zero, since a file with a zero DV will not have any data in
* it. However, some platforms (notably Linux 2.6.22+) will keep a page
* full of zeroes around for an empty file. So play it safe and always
* flush pages. */
AFS_STATCNT(osi_FlushPages);
hset(origDV, avc->f.m.DataVersion);
afs_Trace3(afs_iclSetp, CM_TRACE_FLUSHPAGES, ICL_TYPE_POINTER, avc,
ICL_TYPE_INT32, origDV.low, ICL_TYPE_INT32, avc->f.m.Length);
ReleaseWriteLock(&avc->lock);
#ifndef AFS_FBSD70_ENV
AFS_GUNLOCK();
#endif
osi_VM_FlushPages(avc, credp);
#ifndef AFS_FBSD70_ENV
AFS_GLOCK();
#endif
ObtainWriteLock(&avc->lock, 88);
/* do this last, and to original version, since stores may occur
* while executing above PUTPAGE call */
hset(avc->mapDV, origDV);
ReleaseWriteLock(&avc->lock);
}
int
afs_InvalidateAllSegments(struct vcache *avc)
{
struct dcache *tdc;
afs_int32 hash;
afs_int32 index;
struct dcache **dcList;
int i, dcListMax, dcListCount;
AFS_STATCNT(afs_InvalidateAllSegments);
afs_Trace2(afs_iclSetp, CM_TRACE_INVALL, ICL_TYPE_POINTER, avc,
ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
hash = DVHash(&avc->f.fid);
avc->f.truncPos = AFS_NOTRUNC; /* don't truncate later */
avc->f.states &= ~CExtendedFile; /* not any more */
ObtainWriteLock(&afs_xcbhash, 459);
afs_DequeueCallback(avc);
avc->f.states &= ~(CStatd | CDirty); /* mark status information as bad, too */
ReleaseWriteLock(&afs_xcbhash);
if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
osi_dnlc_purgedp(avc);
/* Blow away pages; for now, only for Solaris */
#if (defined(AFS_SUN5_ENV))
if (WriteLocked(&avc->lock))
osi_ReleaseVM(avc, (afs_ucred_t *)0);
#endif
/*
* Block out others from screwing with this table; is a read lock
* sufficient?
*/
ObtainWriteLock(&afs_xdcache, 286);
dcListMax = 0;
for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
tdc = afs_GetDSlot(index, 0);
ReleaseReadLock(&tdc->tlock);
if (!FidCmp(&tdc->f.fid, &avc->f.fid))
dcListMax++;
afs_PutDCache(tdc);
}
index = afs_dvnextTbl[index];
}
dcList = osi_Alloc(dcListMax * sizeof(struct dcache *));
dcListCount = 0;
for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
tdc = afs_GetDSlot(index, 0);
ReleaseReadLock(&tdc->tlock);
if (!FidCmp(&tdc->f.fid, &avc->f.fid)) {
/* same file? we'll zap it */
if (afs_indexFlags[index] & IFDataMod) {
afs_stats_cmperf.cacheCurrDirtyChunks--;
/* don't write it back */
afs_indexFlags[index] &= ~IFDataMod;
}
afs_indexFlags[index] &= ~IFAnyPages;
if (dcListCount < dcListMax)
dcList[dcListCount++] = tdc;
else
afs_PutDCache(tdc);
} else {
afs_PutDCache(tdc);
}
}
index = afs_dvnextTbl[index];
}
ReleaseWriteLock(&afs_xdcache);
for (i = 0; i < dcListCount; i++) {
tdc = dcList[i];
ObtainWriteLock(&tdc->lock, 679);
ZapDCE(tdc);
if (vType(avc) == VDIR)
DZap(tdc);
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
osi_Free(dcList, dcListMax * sizeof(struct dcache *));
return 0;
}
int
afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, afs_ucred_t *acred)
#endif
{
afs_int32 code;
struct vrequest *treq = NULL;
struct unixuser *au;
int inited = 0;
OSI_VC_CONVERT(avc);
AFS_STATCNT(afs_getattr);
afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
if (afs_fakestat_enable && avc->mvstat == AFS_MVSTAT_MTPT) {
struct afs_fakestat_state fakestat;
struct vrequest *ureq = NULL;
code = afs_CreateReq(&ureq, acred);
if (code) {
return code;
}
afs_InitFakeStat(&fakestat);
code = afs_TryEvalFakeStat(&avc, &fakestat, ureq);
if (code) {
afs_PutFakeStat(&fakestat);
afs_DestroyReq(ureq);
return code;
}
code = afs_CopyOutAttrs(avc, attrs);
afs_PutFakeStat(&fakestat);
afs_DestroyReq(ureq);
return code;
}
#if defined(AFS_SUN5_ENV)
if (flags & ATTR_HINT) {
code = afs_CopyOutAttrs(avc, attrs);
return code;
}
#endif
#if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
if (avc->f.states & CUBCinit) {
code = afs_CopyOutAttrs(avc, attrs);
return code;
}
#endif
AFS_DISCON_LOCK();
if (afs_shuttingdown != AFS_RUNNING) {
AFS_DISCON_UNLOCK();
return EIO;
}
if (!(avc->f.states & CStatd)) {
if (!(code = afs_CreateReq(&treq, acred))) {
code = afs_VerifyVCache2(avc, treq);
inited = 1;
}
} else
code = 0;
#if defined(AFS_SUN5_ENV)
if (code == 0)
osi_FlushPages(avc, acred);
#endif
if (code == 0) {
osi_FlushText(avc); /* only needed to flush text if text locked last time */
code = afs_CopyOutAttrs(avc, attrs);
if (afs_nfsexporter) {
if (!inited) {
if ((code = afs_CreateReq(&treq, acred))) {
return code;
}
inited = 1;
}
if (AFS_NFSXLATORREQ(acred)) {
if ((vType(avc) != VDIR)
&& !afs_AccessOK(avc, PRSFS_READ, treq,
CHECK_MODE_BITS |
CMB_ALLOW_EXEC_AS_READ)) {
afs_DestroyReq(treq);
return EACCES;
}
}
if ((au = afs_FindUser(treq->uid, -1, READ_LOCK))) {
struct afs_exporter *exporter = au->exporter;
if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
unsigned int ubits;
/*
* If the remote user wishes to enforce default Unix mode semantics,
* like in the nfs exporter case, we OR in the user bits
* into the group and other bits. We need to do this
* because there is no RFS_ACCESS call and thus nfs
* clients implement nfs_access by interpreting the
* mode bits in the traditional way, which of course
* loses with afs.
*/
ubits = (attrs->va_mode & 0700) >> 6;
attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
/* If it's the root of AFS, replace the inode number with the
* inode number of the mounted on directory; otherwise this
* confuses getwd()... */
#ifdef AFS_LINUX22_ENV
if (avc == afs_globalVp) {
struct inode *ip = AFSTOV(avc)->i_sb->s_root->d_inode;
attrs->va_nodeid = ip->i_ino; /* VTOI()? */
}
#else
if (
#if defined(AFS_DARWIN_ENV)
vnode_isvroot(AFSTOV(avc))
#elif defined(AFS_NBSD50_ENV)
AFSTOV(avc)->v_vflag & VV_ROOT
#else
AFSTOV(avc)->v_flag & VROOT
#endif
) {
struct vnode *vp = AFSTOV(avc);
#ifdef AFS_DARWIN80_ENV
/* XXX vp = vnode_mount(vp)->mnt_vnodecovered; */
vp = 0;
#else
vp = vp->v_vfsp->vfs_vnodecovered;
if (vp) { /* Ignore weird failures */
#ifdef AFS_SGI62_ENV
attrs->va_nodeid = VnodeToIno(vp);
#else
struct inode *ip;
ip = (struct inode *)VTOI(vp);
if (ip) /* Ignore weird failures */
attrs->va_nodeid = ip->i_number;
#endif
}
#endif
}
#endif /* AFS_LINUX22_ENV */
}
afs_PutUser(au, READ_LOCK);
}
}
/*!
* Remove a vnode on the server, be it file or directory.
* Not much to do here only get the parent dir's fid and call the
* removal rpc.
*
* \param avc The deleted vcache
* \param areq
*
* \note The vcache refcount should be dropped because it points to
* a deleted vnode and has served it's purpouse, but we drop refcount
* on shadow dir deletio (we still need it for that).
*
* \note avc must be write locked.
*/
int
afs_ProcessOpRemove(struct vcache *avc, struct vrequest *areq)
{
char *tname = NULL;
struct AFSFetchStatus OutDirStatus;
struct VenusFid pdir_fid;
struct AFSVolSync tsync;
struct afs_conn *tc;
struct rx_connection *rxconn;
struct vcache *tdp = NULL;
int code = 0;
XSTATS_DECLS;
tname = afs_osi_Alloc(AFSNAMEMAX);
if (!tname) {
/* printf("afs_ProcessOpRemove: Couldn't alloc space for file name\n"); */
return ENOMEM;
}
code = afs_GetParentVCache(avc, 1, &pdir_fid, tname, &tdp);
if (code)
goto end;
if ((vType(avc) == VDIR) && (afs_CheckDeletedChildren(avc))) {
/* Deleted children of this dir remain unsynchronized.
* Defer this vcache.
*/
code = EAGAIN;
goto end;
}
if (vType(avc) == VREG || vType(avc) == VLNK) {
/* Remove file on server. */
do {
tc = afs_Conn(&pdir_fid, areq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEFILE);
RX_AFS_GUNLOCK();
code = RXAFS_RemoveFile(rxconn,
&pdir_fid.Fid,
tname,
&OutDirStatus,
&tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze(tc,
rxconn,
code,
&pdir_fid,
areq,
AFS_STATS_FS_RPCIDX_REMOVEFILE,
SHARED_LOCK,
NULL));
} else if (vType(avc) == VDIR) {
/* Remove dir on server. */
do {
tc = afs_Conn(&pdir_fid, areq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEDIR);
RX_AFS_GUNLOCK();
code = RXAFS_RemoveDir(rxconn,
&pdir_fid.Fid,
tname,
&OutDirStatus,
&tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze(tc,
rxconn,
code,
&pdir_fid,
areq,
AFS_STATS_FS_RPCIDX_REMOVEDIR,
SHARED_LOCK,
NULL));
} /* if (vType(avc) == VREG) */
/* if (code) printf("afs_ProcessOpRemove: server returned code=%u\n", code); */
end:
afs_osi_Free(tname, AFSNAMEMAX);
return code;
}
/*!
* Handles all the reconnection details:
* - Get all the details about the vnode: name, fid, and parent dir fid.
* - Send data to server.
* - Handle errors.
* - Reorder vhash and dcaches in their hashes, using the newly acquired fid.
*/
int
afs_ProcessOpCreate(struct vcache *avc, struct vrequest *areq,
afs_ucred_t *acred)
{
char *tname = NULL, *ttargetName = NULL;
struct AFSStoreStatus InStatus;
struct AFSFetchStatus OutFidStatus, OutDirStatus;
struct VenusFid pdir_fid, newFid;
struct AFSCallBack CallBack;
struct AFSVolSync tsync;
struct vcache *tdp = NULL, *tvc = NULL;
struct dcache *tdc = NULL;
struct afs_conn *tc;
struct rx_connection *rxconn;
afs_int32 hash, new_hash, index;
afs_size_t tlen;
int code, op = 0;
XSTATS_DECLS;
tname = afs_osi_Alloc(AFSNAMEMAX);
if (!tname)
return ENOMEM;
code = afs_GetParentVCache(avc, 0, &pdir_fid, tname, &tdp);
if (code)
goto end;
/* This data may also be in linkData, but then we have to deal with
* the joy of terminating NULLs and . and file modes. So just get
* it from the dcache where it won't have been fiddled with.
*/
if (vType(avc) == VLNK) {
afs_size_t offset;
struct dcache *tdc;
struct osi_file *tfile;
tdc = afs_GetDCache(avc, 0, areq, &offset, &tlen, 0);
if (!tdc) {
code = ENOENT;
goto end;
}
if (tlen > 1024) {
afs_PutDCache(tdc);
code = EFAULT;
goto end;
}
tlen++; /* space for NULL */
ttargetName = afs_osi_Alloc(tlen);
if (!ttargetName) {
afs_PutDCache(tdc);
return ENOMEM;
}
ObtainReadLock(&tdc->lock);
tfile = afs_CFileOpen(&tdc->f.inode);
code = afs_CFileRead(tfile, 0, ttargetName, tlen);
ttargetName[tlen-1] = '\0';
afs_CFileClose(tfile);
ReleaseReadLock(&tdc->lock);
afs_PutDCache(tdc);
}
/* Set status. */
InStatus.Mask = AFS_SETMODTIME | AFS_SETMODE | AFS_SETGROUP;
InStatus.ClientModTime = avc->f.m.Date;
InStatus.Owner = avc->f.m.Owner;
InStatus.Group = (afs_int32) afs_cr_gid(acred);
/* Only care about protection bits. */
InStatus.UnixModeBits = avc->f.m.Mode & 0xffff;
do {
tc = afs_Conn(&tdp->f.fid, areq, SHARED_LOCK, &rxconn);
if (tc) {
switch (vType(avc)) {
case VREG:
/* Make file on server. */
op = AFS_STATS_FS_RPCIDX_CREATEFILE;
XSTATS_START_TIME(op);
RX_AFS_GUNLOCK();
code = RXAFS_CreateFile(tc->id,
(struct AFSFid *)&tdp->f.fid.Fid,
tname, &InStatus,
(struct AFSFid *) &newFid.Fid,
&OutFidStatus, &OutDirStatus,
&CallBack, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
break;
case VDIR:
/* Make dir on server. */
op = AFS_STATS_FS_RPCIDX_MAKEDIR;
XSTATS_START_TIME(op);
RX_AFS_GUNLOCK();
code = RXAFS_MakeDir(rxconn, (struct AFSFid *) &tdp->f.fid.Fid,
tname, &InStatus,
(struct AFSFid *) &newFid.Fid,
&OutFidStatus, &OutDirStatus,
&CallBack, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
break;
case VLNK:
/* Make symlink on server. */
op = AFS_STATS_FS_RPCIDX_SYMLINK;
XSTATS_START_TIME(op);
RX_AFS_GUNLOCK();
code = RXAFS_Symlink(rxconn,
(struct AFSFid *) &tdp->f.fid.Fid,
tname, ttargetName, &InStatus,
(struct AFSFid *) &newFid.Fid,
&OutFidStatus, &OutDirStatus, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
break;
default:
op = AFS_STATS_FS_RPCIDX_CREATEFILE;
code = 1;
break;
}
} else
code = -1;
} while (afs_Analyze(tc, rxconn, code, &tdp->f.fid, areq, op, SHARED_LOCK, NULL));
/* TODO: Handle errors. */
if (code) {
/* printf("afs_ProcessOpCreate: error while creating vnode on server, code=%d .\n", code); */
goto end;
}
/* The rpc doesn't set the cell number. */
newFid.Cell = avc->f.fid.Cell;
/*
* Change the fid in the dir entry.
*/
/* Seek the dir's dcache. */
tdc = afs_FindDCacheByFid(&tdp->f.fid);
if (tdc) {
/* And now change the fid in the parent dir entry. */
afs_dir_ChangeFid(tdc, tname, &avc->f.fid.Fid.Vnode, &newFid.Fid.Vnode);
afs_PutDCache(tdc);
}
if (vType(avc) == VDIR) {
/* Change fid in the dir for the "." entry. ".." has alredy been
* handled by afs_FixChildrenFids when processing the parent dir.
*/
tdc = afs_FindDCacheByFid(&avc->f.fid);
if (tdc) {
afs_dir_ChangeFid(tdc, ".", &avc->f.fid.Fid.Vnode,
&newFid.Fid.Vnode);
if (avc->f.m.LinkCount >= 2)
/* For non empty dirs, fix children's parentVnode and
* parentUnique reference.
*/
afs_FixChildrenFids(&avc->f.fid, &newFid);
afs_PutDCache(tdc);
}
}
/* Recompute hash chain positions for vnode and dcaches.
* Then change to the new FID.
*/
/* The vcache goes first. */
ObtainWriteLock(&afs_xvcache, 735);
/* Old fid hash. */
hash = VCHash(&avc->f.fid);
/* New fid hash. */
new_hash = VCHash(&newFid);
/* Remove hash from old position. */
/* XXX: not checking array element contents. It shouldn't be empty.
* If it oopses, then something else might be wrong.
*/
if (afs_vhashT[hash] == avc) {
/* First in hash chain (might be the only one). */
afs_vhashT[hash] = avc->hnext;
} else {
/* More elements in hash chain. */
for (tvc = afs_vhashT[hash]; tvc; tvc = tvc->hnext) {
if (tvc->hnext == avc) {
tvc->hnext = avc->hnext;
break;
}
}
} /* if (!afs_vhashT[i]->hnext) */
QRemove(&avc->vhashq);
/* Insert hash in new position. */
avc->hnext = afs_vhashT[new_hash];
afs_vhashT[new_hash] = avc;
QAdd(&afs_vhashTV[VCHashV(&newFid)], &avc->vhashq);
ReleaseWriteLock(&afs_xvcache);
/* Do the same thing for all dcaches. */
hash = DVHash(&avc->f.fid);
ObtainWriteLock(&afs_xdcache, 743);
for (index = afs_dvhashTbl[hash]; index != NULLIDX; index = hash) {
hash = afs_dvnextTbl[index];
tdc = afs_GetValidDSlot(index);
ReleaseReadLock(&tdc->tlock);
if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
if (!FidCmp(&tdc->f.fid, &avc->f.fid)) {
/* Safer but slower. */
afs_HashOutDCache(tdc, 0);
/* Put dcache in new positions in the dchash and dvhash. */
new_hash = DCHash(&newFid, tdc->f.chunk);
afs_dcnextTbl[tdc->index] = afs_dchashTbl[new_hash];
afs_dchashTbl[new_hash] = tdc->index;
new_hash = DVHash(&newFid);
afs_dvnextTbl[tdc->index] = afs_dvhashTbl[new_hash];
afs_dvhashTbl[new_hash] = tdc->index;
afs_indexUnique[tdc->index] = newFid.Fid.Unique;
memcpy(&tdc->f.fid, &newFid, sizeof(struct VenusFid));
} /* if fid match */
} /* if uniquifier match */
if (tdc)
afs_PutDCache(tdc);
} /* for all dcaches in this hash bucket */
ReleaseWriteLock(&afs_xdcache);
/* Now we can set the new fid. */
memcpy(&avc->f.fid, &newFid, sizeof(struct VenusFid));
end:
if (tdp)
afs_PutVCache(tdp);
afs_osi_Free(tname, AFSNAMEMAX);
if (ttargetName)
afs_osi_Free(ttargetName, tlen);
return code;
}
/**
* Reset volume name to volume id mapping cache.
* @param flags
*/
void
afs_CheckVolumeNames(int flags)
{
afs_int32 i, j;
struct volume *tv;
unsigned int now;
struct vcache *tvc;
afs_int32 *volumeID, *cellID, vsize, nvols;
#ifdef AFS_DARWIN80_ENV
vnode_t tvp;
#endif
AFS_STATCNT(afs_CheckVolumeNames);
nvols = 0;
volumeID = cellID = NULL;
vsize = 0;
ObtainReadLock(&afs_xvolume);
if (flags & AFS_VOLCHECK_EXPIRED) {
/*
* allocate space to hold the volumeIDs and cellIDs, only if
* we will be invalidating the mountpoints later on
*/
for (i = 0; i < NVOLS; i++)
for (tv = afs_volumes[i]; tv; tv = tv->next)
++vsize;
volumeID = afs_osi_Alloc(2 * vsize * sizeof(*volumeID));
cellID = (volumeID) ? volumeID + vsize : 0;
}
now = osi_Time();
for (i = 0; i < NVOLS; i++) {
for (tv = afs_volumes[i]; tv; tv = tv->next) {
if (flags & AFS_VOLCHECK_EXPIRED) {
if (((tv->expireTime < (now + 10)) && (tv->states & VRO))
|| (flags & AFS_VOLCHECK_FORCE)) {
afs_ResetVolumeInfo(tv); /* also resets status */
if (volumeID) {
volumeID[nvols] = tv->volume;
cellID[nvols] = tv->cell;
}
++nvols;
continue;
}
}
/* ??? */
if (flags & (AFS_VOLCHECK_BUSY | AFS_VOLCHECK_FORCE)) {
for (j = 0; j < AFS_MAXHOSTS; j++)
tv->status[j] = not_busy;
}
}
}
ReleaseReadLock(&afs_xvolume);
/* next ensure all mt points are re-evaluated */
if (nvols || (flags & (AFS_VOLCHECK_FORCE | AFS_VOLCHECK_MTPTS))) {
loop:
ObtainReadLock(&afs_xvcache);
for (i = 0; i < VCSIZE; i++) {
for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
/* if the volume of "mvid" of the vcache entry is among the
* ones we found earlier, then we re-evaluate it. Also, if the
* force bit is set or we explicitly asked to reevaluate the
* mt-pts, we clean the cmvalid bit */
if ((flags & (AFS_VOLCHECK_FORCE | AFS_VOLCHECK_MTPTS))
|| (tvc->mvid
&& inVolList(tvc->mvid, nvols, volumeID, cellID)))
tvc->f.states &= ~CMValid;
/* If the volume that this file belongs to was reset earlier,
* then we should remove its callback.
* Again, if forced, always do it.
*/
if ((tvc->f.states & CRO)
&& (inVolList(&tvc->f.fid, nvols, volumeID, cellID)
|| (flags & AFS_VOLCHECK_FORCE))) {
if (tvc->f.states & CVInit) {
ReleaseReadLock(&afs_xvcache);
afs_osi_Sleep(&tvc->f.states);
goto loop;
}
#ifdef AFS_DARWIN80_ENV
if (tvc->f.states & CDeadVnode) {
ReleaseReadLock(&afs_xvcache);
afs_osi_Sleep(&tvc->f.states);
goto loop;
}
tvp = AFSTOV(tvc);
if (vnode_get(tvp))
continue;
if (vnode_ref(tvp)) {
AFS_GUNLOCK();
/* AFSTOV(tvc) may be NULL */
vnode_put(tvp);
AFS_GLOCK();
continue;
}
#else
AFS_FAST_HOLD(tvc);
#endif
ReleaseReadLock(&afs_xvcache);
ObtainWriteLock(&afs_xcbhash, 485);
/* LOCKXXX: We aren't holding tvc write lock? */
afs_DequeueCallback(tvc);
tvc->f.states &= ~CStatd;
ReleaseWriteLock(&afs_xcbhash);
if (tvc->f.fid.Fid.Vnode & 1 || (vType(tvc) == VDIR))
osi_dnlc_purgedp(tvc);
#ifdef AFS_DARWIN80_ENV
vnode_put(AFSTOV(tvc));
/* our tvc ptr is still good until now */
AFS_FAST_RELE(tvc);
ObtainReadLock(&afs_xvcache);
#else
ObtainReadLock(&afs_xvcache);
/* our tvc ptr is still good until now */
AFS_FAST_RELE(tvc);
#endif
}
}
}
osi_dnlc_purge(); /* definitely overkill, but it's safer this way. */
ReleaseReadLock(&afs_xvcache);
}
if (volumeID)
afs_osi_Free(volumeID, 2 * vsize * sizeof(*volumeID));
} /*afs_CheckVolumeNames */
int
afs_AccessOK(struct vcache *avc, afs_int32 arights, struct vrequest *areq,
afs_int32 check_mode_bits)
{
register struct vcache *tvc;
struct VenusFid dirFid;
register afs_int32 mask;
afs_int32 dirBits;
register afs_int32 fileBits;
AFS_STATCNT(afs_AccessOK);
if ((vType(avc) == VDIR) || (avc->f.states & CForeign)) {
/* rights are just those from acl */
if (afs_InReadDir(avc)) {
/* if we are already in readdir, then they may have read and
* lookup, and nothing else, and nevermind the real ACL.
* Otherwise we might end up with problems trying to call
* FetchStatus on the vnode readdir is working on, and that
* would be a real mess.
*/
dirBits = PRSFS_LOOKUP | PRSFS_READ;
return (arights == (dirBits & arights));
}
return (arights == afs_GetAccessBits(avc, arights, areq));
} else {
/* some rights come from dir and some from file. Specifically, you
* have "a" rights to a file if you are its owner, which comes
* back as "a" rights to the file. You have other rights just
* from dir, but all are restricted by the file mode bit. Now,
* if you have I and A rights to a file, we throw in R and W
* rights for free. These rights will then be restricted by
* the access mask. */
dirBits = 0;
if (avc->f.parent.vnode) {
dirFid.Cell = avc->f.fid.Cell;
dirFid.Fid.Volume = avc->f.fid.Fid.Volume;
dirFid.Fid.Vnode = avc->f.parent.vnode;
dirFid.Fid.Unique = avc->f.parent.unique;
/* Avoid this GetVCache call */
tvc = afs_GetVCache(&dirFid, areq, NULL, NULL);
if (tvc) {
dirBits = afs_GetAccessBits(tvc, arights, areq);
afs_PutVCache(tvc);
}
} else
dirBits = 0xffffffff; /* assume OK; this is a race condition */
if (arights & PRSFS_ADMINISTER)
fileBits = afs_GetAccessBits(avc, arights, areq);
else
fileBits = 0; /* don't make call if results don't matter */
/* compute basic rights in fileBits, taking A from file bits */
fileBits =
(fileBits & PRSFS_ADMINISTER) | (dirBits & ~PRSFS_ADMINISTER);
/* for files, throw in R and W if have I and A (owner). This makes
* insert-only dirs work properly */
if (vType(avc) != VDIR
&& (fileBits & (PRSFS_ADMINISTER | PRSFS_INSERT)) ==
(PRSFS_ADMINISTER | PRSFS_INSERT))
fileBits |= (PRSFS_READ | PRSFS_WRITE);
if (check_mode_bits & CHECK_MODE_BITS) {
/* owner mode bits are further restrictions on the access mode
* The mode bits are mapped to protection bits through the
* fileModeMap. If CMB_ALLOW_EXEC_AS_READ is set, it's from the
* NFS translator and we don't know if it's a read or execute
* on the NFS client, but both need to read the data.
*/
mask = (avc->f.m.Mode & 0700) >> 6; /* file restrictions to use */
fileBits &= ~fileModeMap[mask];
if (check_mode_bits & CMB_ALLOW_EXEC_AS_READ) {
if (avc->f.m.Mode & 0100)
fileBits |= PRSFS_READ;
}
}
return ((fileBits & arights) == arights); /* true if all rights bits are on */
}
int
afsrename(struct vcache *aodp, char *aname1, struct vcache *andp,
char *aname2, struct AFS_UCRED *acred, struct vrequest *areq)
{
register struct afs_conn *tc;
register afs_int32 code = 0;
afs_int32 returnCode;
int oneDir, doLocally;
afs_size_t offset, len;
struct VenusFid unlinkFid, fileFid;
struct vcache *tvc;
struct dcache *tdc1, *tdc2;
struct AFSFetchStatus OutOldDirStatus, OutNewDirStatus;
struct AFSVolSync tsync;
XSTATS_DECLS;
AFS_STATCNT(afs_rename);
afs_Trace4(afs_iclSetp, CM_TRACE_RENAME, ICL_TYPE_POINTER, aodp,
ICL_TYPE_STRING, aname1, ICL_TYPE_POINTER, andp,
ICL_TYPE_STRING, aname2);
if (strlen(aname1) > AFSNAMEMAX || strlen(aname2) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done;
}
/* verify the latest versions of the stat cache entries */
tagain:
code = afs_VerifyVCache(aodp, areq);
if (code)
goto done;
code = afs_VerifyVCache(andp, areq);
if (code)
goto done;
/* lock in appropriate order, after some checks */
if (aodp->f.fid.Cell != andp->f.fid.Cell
|| aodp->f.fid.Fid.Volume != andp->f.fid.Fid.Volume) {
code = EXDEV;
goto done;
}
oneDir = 0;
code = 0;
if (andp->f.fid.Fid.Vnode == aodp->f.fid.Fid.Vnode) {
if (!strcmp(aname1, aname2)) {
/* Same directory and same name; this is a noop and just return success
* to save cycles and follow posix standards */
code = 0;
goto done;
}
if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
code = ENETDOWN;
goto done;
}
ObtainWriteLock(&andp->lock, 147);
tdc1 = afs_GetDCache(aodp, (afs_size_t) 0, areq, &offset, &len, 0);
if (!tdc1) {
code = ENOENT;
} else {
ObtainWriteLock(&tdc1->lock, 643);
}
tdc2 = tdc1;
oneDir = 1; /* only one dude locked */
} else if ((andp->f.states & CRO) || (aodp->f.states & CRO)) {
code = EROFS;
goto done;
} else if (andp->f.fid.Fid.Vnode < aodp->f.fid.Fid.Vnode) {
ObtainWriteLock(&andp->lock, 148); /* lock smaller one first */
ObtainWriteLock(&aodp->lock, 149);
tdc2 = afs_FindDCache(andp, (afs_size_t) 0);
if (tdc2)
ObtainWriteLock(&tdc2->lock, 644);
tdc1 = afs_GetDCache(aodp, (afs_size_t) 0, areq, &offset, &len, 0);
if (tdc1)
ObtainWriteLock(&tdc1->lock, 645);
else
code = ENOENT;
} else {
ObtainWriteLock(&aodp->lock, 150); /* lock smaller one first */
ObtainWriteLock(&andp->lock, 557);
tdc1 = afs_GetDCache(aodp, (afs_size_t) 0, areq, &offset, &len, 0);
if (tdc1)
ObtainWriteLock(&tdc1->lock, 646);
else
code = ENOENT;
tdc2 = afs_FindDCache(andp, (afs_size_t) 0);
if (tdc2)
ObtainWriteLock(&tdc2->lock, 647);
}
osi_dnlc_remove(aodp, aname1, 0);
osi_dnlc_remove(andp, aname2, 0);
/*
* Make sure that the data in the cache is current. We may have
* received a callback while we were waiting for the write lock.
*/
if (tdc1) {
if (!(aodp->f.states & CStatd)
|| !hsame(aodp->f.m.DataVersion, tdc1->f.versionNo)) {
ReleaseWriteLock(&aodp->lock);
if (!oneDir) {
if (tdc2) {
ReleaseWriteLock(&tdc2->lock);
afs_PutDCache(tdc2);
}
ReleaseWriteLock(&andp->lock);
}
ReleaseWriteLock(&tdc1->lock);
afs_PutDCache(tdc1);
goto tagain;
}
}
if (code == 0)
code = afs_dir_Lookup(tdc1, aname1, &fileFid.Fid);
if (code) {
if (tdc1) {
ReleaseWriteLock(&tdc1->lock);
afs_PutDCache(tdc1);
}
ReleaseWriteLock(&aodp->lock);
if (!oneDir) {
if (tdc2) {
ReleaseWriteLock(&tdc2->lock);
afs_PutDCache(tdc2);
}
ReleaseWriteLock(&andp->lock);
}
goto done;
}
if (!AFS_IS_DISCON_RW) {
/* Connected. */
do {
tc = afs_Conn(&aodp->f.fid, areq, SHARED_LOCK);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_RENAME);
RX_AFS_GUNLOCK();
code =
RXAFS_Rename(tc->id,
(struct AFSFid *)&aodp->f.fid.Fid,
aname1,
(struct AFSFid *)&andp->f.fid.Fid,
aname2,
&OutOldDirStatus,
&OutNewDirStatus,
&tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze
(tc, code, &andp->f.fid, areq, AFS_STATS_FS_RPCIDX_RENAME,
SHARED_LOCK, NULL));
} else {
#if defined(AFS_DISCON_ENV)
/* Disconnected. */
/* Seek moved file vcache. */
fileFid.Cell = aodp->f.fid.Cell;
fileFid.Fid.Volume = aodp->f.fid.Fid.Volume;
ObtainSharedLock(&afs_xvcache, 754);
tvc = afs_FindVCache(&fileFid, 0 , 1);
ReleaseSharedLock(&afs_xvcache);
if (tvc) {
/* XXX - We're locking this vcache whilst holding dcaches. Ooops */
ObtainWriteLock(&tvc->lock, 750);
if (!(tvc->f.ddirty_flags & (VDisconRename|VDisconCreate))) {
/* If the vnode was created locally, then we don't care
* about recording the rename - we'll do it automatically
* on replay. If we've already renamed, we've already stored
* the required information about where we came from.
*/
if (!aodp->f.shadow.vnode) {
/* Make shadow copy of parent dir only. */
afs_MakeShadowDir(aodp, tdc1);
}
/* Save old parent dir fid so it will be searchable
* in the shadow dir.
*/
tvc->f.oldParent.vnode = aodp->f.fid.Fid.Vnode;
tvc->f.oldParent.unique = aodp->f.fid.Fid.Unique;
afs_DisconAddDirty(tvc,
VDisconRename
| (oneDir ? VDisconRenameSameDir:0),
1);
}
ReleaseWriteLock(&tvc->lock);
afs_PutVCache(tvc);
} else {
code = ENOENT;
} /* if (tvc) */
#endif
} /* if !(AFS_IS_DISCON_RW)*/
returnCode = code; /* remember for later */
/* Now we try to do things locally. This is really loathsome code. */
unlinkFid.Fid.Vnode = 0;
if (code == 0) {
/* In any event, we don't really care if the data (tdc2) is not
* in the cache; if it isn't, we won't do the update locally. */
/* see if version numbers increased properly */
doLocally = 1;
if (!AFS_IS_DISCON_RW) {
if (oneDir) {
/* number increases by 1 for whole rename operation */
if (!afs_LocalHero(aodp, tdc1, &OutOldDirStatus, 1)) {
doLocally = 0;
}
} else {
/* two separate dirs, each increasing by 1 */
if (!afs_LocalHero(aodp, tdc1, &OutOldDirStatus, 1))
doLocally = 0;
if (!afs_LocalHero(andp, tdc2, &OutNewDirStatus, 1))
doLocally = 0;
if (!doLocally) {
if (tdc1) {
ZapDCE(tdc1);
DZap(tdc1);
}
if (tdc2) {
ZapDCE(tdc2);
DZap(tdc2);
}
}
}
} /* if (!AFS_IS_DISCON_RW) */
/* now really do the work */
if (doLocally) {
/* first lookup the fid of the dude we're moving */
code = afs_dir_Lookup(tdc1, aname1, &fileFid.Fid);
if (code == 0) {
/* delete the source */
code = afs_dir_Delete(tdc1, aname1);
}
/* first see if target is there */
if (code == 0
&& afs_dir_Lookup(tdc2, aname2,
&unlinkFid.Fid) == 0) {
/* target already exists, and will be unlinked by server */
code = afs_dir_Delete(tdc2, aname2);
}
if (code == 0) {
ObtainWriteLock(&afs_xdcache, 292);
code = afs_dir_Create(tdc2, aname2, &fileFid.Fid);
ReleaseWriteLock(&afs_xdcache);
}
if (code != 0) {
ZapDCE(tdc1);
DZap(tdc1);
if (!oneDir) {
ZapDCE(tdc2);
DZap(tdc2);
}
}
}
/* update dir link counts */
if (AFS_IS_DISCON_RW) {
if (!oneDir) {
aodp->f.m.LinkCount--;
andp->f.m.LinkCount++;
}
/* If we're in the same directory, link count doesn't change */
} else {
aodp->f.m.LinkCount = OutOldDirStatus.LinkCount;
if (!oneDir)
andp->f.m.LinkCount = OutNewDirStatus.LinkCount;
}
} else { /* operation failed (code != 0) */
if (code < 0) {
/* if failed, server might have done something anyway, and
* assume that we know about it */
ObtainWriteLock(&afs_xcbhash, 498);
afs_DequeueCallback(aodp);
afs_DequeueCallback(andp);
andp->f.states &= ~CStatd;
aodp->f.states &= ~CStatd;
ReleaseWriteLock(&afs_xcbhash);
osi_dnlc_purgedp(andp);
osi_dnlc_purgedp(aodp);
}
}
/* release locks */
if (tdc1) {
ReleaseWriteLock(&tdc1->lock);
afs_PutDCache(tdc1);
}
if ((!oneDir) && tdc2) {
ReleaseWriteLock(&tdc2->lock);
afs_PutDCache(tdc2);
}
ReleaseWriteLock(&aodp->lock);
if (!oneDir) {
ReleaseWriteLock(&andp->lock);
}
if (returnCode) {
code = returnCode;
goto done;
}
/* now, some more details. if unlinkFid.Fid.Vnode then we should decrement
* the link count on this file. Note that if fileFid is a dir, then we don't
* have to invalidate its ".." entry, since its DataVersion # should have
* changed. However, interface is not good enough to tell us the
* *file*'s new DataVersion, so we're stuck. Our hack: delete mark
* the data as having an "unknown" version (effectively discarding the ".."
* entry */
if (unlinkFid.Fid.Vnode) {
unlinkFid.Fid.Volume = aodp->f.fid.Fid.Volume;
unlinkFid.Cell = aodp->f.fid.Cell;
tvc = NULL;
if (!unlinkFid.Fid.Unique) {
tvc = afs_LookupVCache(&unlinkFid, areq, NULL, aodp, aname1);
}
if (!tvc) /* lookup failed or wasn't called */
tvc = afs_GetVCache(&unlinkFid, areq, NULL, NULL);
if (tvc) {
#ifdef AFS_BOZONLOCK_ENV
afs_BozonLock(&tvc->pvnLock, tvc); /* Since afs_TryToSmush will do a pvn_vptrunc */
#endif
ObtainWriteLock(&tvc->lock, 151);
tvc->f.m.LinkCount--;
tvc->f.states &= ~CUnique; /* For the dfs xlator */
if (tvc->f.m.LinkCount == 0 && !osi_Active(tvc)) {
/* if this was last guy (probably) discard from cache.
* We have to be careful to not get rid of the stat
* information, since otherwise operations will start
* failing even if the file was still open (or
* otherwise active), and the server no longer has the
* info. If the file still has valid links, we'll get
* a break-callback msg from the server, so it doesn't
* matter that we don't discard the status info */
if (!AFS_NFSXLATORREQ(acred))
afs_TryToSmush(tvc, acred, 0);
}
ReleaseWriteLock(&tvc->lock);
#ifdef AFS_BOZONLOCK_ENV
afs_BozonUnlock(&tvc->pvnLock, tvc);
#endif
afs_PutVCache(tvc);
}
}
/* now handle ".." invalidation */
if (!oneDir) {
fileFid.Fid.Volume = aodp->f.fid.Fid.Volume;
fileFid.Cell = aodp->f.fid.Cell;
if (!fileFid.Fid.Unique)
tvc = afs_LookupVCache(&fileFid, areq, NULL, andp, aname2);
else
tvc = afs_GetVCache(&fileFid, areq, NULL, (struct vcache *)0);
if (tvc && (vType(tvc) == VDIR)) {
ObtainWriteLock(&tvc->lock, 152);
tdc1 = afs_FindDCache(tvc, (afs_size_t) 0);
if (tdc1) {
if (AFS_IS_DISCON_RW) {
#if defined(AFS_DISCON_ENV)
/* If disconnected, we need to fix (not discard) the "..".*/
afs_dir_ChangeFid(tdc1,
"..",
&aodp->f.fid.Fid.Vnode,
&andp->f.fid.Fid.Vnode);
#endif
} else {
ObtainWriteLock(&tdc1->lock, 648);
ZapDCE(tdc1); /* mark as unknown */
DZap(tdc1);
ReleaseWriteLock(&tdc1->lock);
afs_PutDCache(tdc1); /* put it back */
}
}
osi_dnlc_remove(tvc, "..", 0);
ReleaseWriteLock(&tvc->lock);
afs_PutVCache(tvc);
} else if (AFS_IS_DISCON_RW && tvc && (vType(tvc) == VREG)) {
/* XXX - Should tvc not get locked here? */
tvc->f.parent.vnode = andp->f.fid.Fid.Vnode;
tvc->f.parent.unique = andp->f.fid.Fid.Unique;
} else if (tvc) {
/* True we shouldn't come here since tvc SHOULD be a dir, but we
* 'syntactically' need to unless we change the 'if' above...
*/
afs_PutVCache(tvc);
}
}
code = returnCode;
done:
return code;
}
/*
* Given a FID, obtain or construct a dentry, or return an error.
* This should be called with the BKL and AFS_GLOCK held.
*/
static struct dentry *get_dentry_from_fid(cred_t *credp, struct VenusFid *afid)
{
struct vrequest treq;
struct vcache *vcp;
struct vattr vattr;
struct inode *ip;
struct dentry *dp;
afs_int32 code;
code = afs_InitReq(&treq, credp);
if (code) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_dentry_from_fid(0x%08x/%d/%d.%d): afs_InitReq: %d\n",
afid->Cell, afid->Fid.Volume, afid->Fid.Vnode, afid->Fid.Unique,
code);
#endif
return ERR_PTR(-afs_CheckCode(code, &treq, 101));
}
vcp = afs_GetVCache(afid, &treq, NULL, NULL);
if (vcp == NULL) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_dentry_from_fid(0x%08x/%d/%d.%d): no vcache\n",
afid->Cell, afid->Fid.Volume, afid->Fid.Vnode, afid->Fid.Unique);
#endif
return NULL;
}
/*
* Now, it might be that we just caused a directory vnode to
* spring into existence, in which case its parent FID is unset.
* We need to do something about that, but only because we care
* in our own get_parent(), below -- the common code never looks
* at parentVnode on directories, except for VIOCGETVCXSTATUS.
* So, if this fails, we don't really care very much.
*/
if (vType(vcp) == VDIR && vcp->mvstat != 2 && !vcp->f.parent.vnode)
update_dir_parent(&treq, vcp);
/*
* If this is a volume root directory and fakestat is enabled,
* we might need to replace the directory by a mount point.
*/
code = UnEvalFakeStat(&treq, &vcp);
if (code) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_dentry_from_fid(0x%08x/%d/%d.%d): UnEvalFakeStat: %d\n",
afid->Cell, afid->Fid.Volume, afid->Fid.Vnode, afid->Fid.Unique,
code);
#endif
afs_PutVCache(vcp);
return ERR_PTR(-afs_CheckCode(code, &treq, 101));
}
ip = AFSTOV(vcp);
afs_getattr(vcp, &vattr, credp);
afs_fill_inode(ip, &vattr);
/* d_alloc_anon might block, so we shouldn't hold the glock */
AFS_GUNLOCK();
dp = d_alloc_anon(ip);
AFS_GLOCK();
if (!dp) {
iput(ip);
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_dentry_from_fid(0x%08x/%d/%d.%d): out of memory\n",
afid->Cell, afid->Fid.Volume, afid->Fid.Vnode, afid->Fid.Unique);
#endif
return ERR_PTR(-ENOMEM);
}
dp->d_op = &afs_dentry_operations;
return dp;
}
int
afs_InvalidateAllSegments(struct vcache *avc)
{
struct dcache *tdc;
afs_int32 hash;
afs_int32 index;
struct dcache **dcList;
int i, dcListMax, dcListCount;
AFS_STATCNT(afs_InvalidateAllSegments);
afs_Trace2(afs_iclSetp, CM_TRACE_INVALL, ICL_TYPE_POINTER, avc,
ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
hash = DVHash(&avc->f.fid);
avc->f.truncPos = AFS_NOTRUNC; /* don't truncate later */
avc->f.states &= ~CExtendedFile; /* not any more */
ObtainWriteLock(&afs_xcbhash, 459);
afs_DequeueCallback(avc);
avc->f.states &= ~(CStatd | CDirty); /* mark status information as bad, too */
ReleaseWriteLock(&afs_xcbhash);
if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
osi_dnlc_purgedp(avc);
/* Blow away pages; for now, only for Solaris */
#if (defined(AFS_SUN5_ENV))
if (WriteLocked(&avc->lock))
osi_ReleaseVM(avc, (afs_ucred_t *)0);
#endif
/*
* Block out others from screwing with this table; is a read lock
* sufficient?
*/
ObtainWriteLock(&afs_xdcache, 286);
dcListMax = 0;
for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
tdc = afs_GetValidDSlot(index);
if (!tdc) {
/* In the case of fatal errors during stores, we MUST
* invalidate all of the relevant chunks. Otherwise, the chunks
* will be left with the 'new' data that was never successfully
* written to the server, but the DV in the dcache is still the
* old DV. So, we may indefinitely serve data to applications
* that is not actually in the file on the fileserver. If we
* cannot afs_GetValidDSlot the appropriate entries, currently
* there is no way to ensure the dcache is invalidated. So for
* now, to avoid risking serving bad data from the cache, panic
* instead. */
osi_Panic("afs_InvalidateAllSegments tdc count");
}
ReleaseReadLock(&tdc->tlock);
if (!FidCmp(&tdc->f.fid, &avc->f.fid))
dcListMax++;
afs_PutDCache(tdc);
}
index = afs_dvnextTbl[index];
}
dcList = osi_Alloc(dcListMax * sizeof(struct dcache *));
dcListCount = 0;
for (index = afs_dvhashTbl[hash]; index != NULLIDX;) {
if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
tdc = afs_GetValidDSlot(index);
if (!tdc) {
/* We cannot proceed after getting this error; we risk serving
* incorrect data to applications. So panic instead. See the
* above comment next to the previous afs_GetValidDSlot call
* for details. */
osi_Panic("afs_InvalidateAllSegments tdc store");
}
ReleaseReadLock(&tdc->tlock);
if (!FidCmp(&tdc->f.fid, &avc->f.fid)) {
/* same file? we'll zap it */
if (afs_indexFlags[index] & IFDataMod) {
afs_stats_cmperf.cacheCurrDirtyChunks--;
/* don't write it back */
afs_indexFlags[index] &= ~IFDataMod;
}
afs_indexFlags[index] &= ~IFAnyPages;
if (dcListCount < dcListMax)
dcList[dcListCount++] = tdc;
else
afs_PutDCache(tdc);
} else {
afs_PutDCache(tdc);
}
}
index = afs_dvnextTbl[index];
}
ReleaseWriteLock(&afs_xdcache);
for (i = 0; i < dcListCount; i++) {
tdc = dcList[i];
ObtainWriteLock(&tdc->lock, 679);
ZapDCE(tdc);
if (vType(avc) == VDIR)
DZap(tdc);
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
osi_Free(dcList, dcListMax * sizeof(struct dcache *));
return 0;
}
static struct dentry *afs_export_get_parent(struct dentry *child)
{
struct VenusFid tfid;
struct vrequest treq;
struct cell *tcell;
struct vcache *vcp;
struct dentry *dp = NULL;
cred_t *credp;
afs_uint32 cellidx;
int code;
if (!child->d_inode) {
/* can't find the parent of a negative dentry */
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_parent(%s): no inode\n",
child->d_name.name ? (char *)child->d_name.name : "?");
#endif
return ERR_PTR(-EIO);
}
credp = crref();
AFS_GLOCK();
vcp = VTOAFS(child->d_inode);
if (afs_IsDynrootMount(vcp)) {
/* the dynmount directory; parent is always the AFS root */
tfid = afs_globalVp->f.fid;
} else if (afs_IsDynrootAny(vcp) &&
VNUM_TO_VNTYPE(vcp->f.fid.Fid.Vnode) == VN_TYPE_MOUNT) {
/* a mount point in the dynmount directory */
afs_GetDynrootMountFid(&tfid);
} else if (vcp->mvstat == 2) {
/* volume root */
ObtainReadLock(&vcp->lock);
if (vcp->mvid && vcp->mvid->Fid.Volume) {
tfid = *vcp->mvid;
ReleaseReadLock(&vcp->lock);
} else {
ReleaseReadLock(&vcp->lock);
tcell = afs_GetCell(vcp->f.fid.Cell, READ_LOCK);
if (!tcell) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_parent(0x%08x/%d/%d.%d): no cell\n",
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique);
#endif
dp = ERR_PTR(-ENOENT);
goto done;
}
cellidx = tcell->cellIndex;
afs_PutCell(tcell, READ_LOCK);
afs_GetDynrootMountFid(&tfid);
tfid.Fid.Vnode = VNUM_FROM_TYPEID(VN_TYPE_MOUNT, cellidx << 2);
tfid.Fid.Unique = vcp->f.fid.Fid.Volume;
}
} else {
/* any other vnode */
if (vType(vcp) == VDIR && !vcp->f.parent.vnode && vcp->mvstat != 1) {
code = afs_InitReq(&treq, credp);
if (code) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_parent(0x%08x/%d/%d.%d): InitReq: %d\n",
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique, code);
#endif
dp = ERR_PTR(-ENOENT);
goto done;
} else {
code = update_dir_parent(&treq, vcp);
if (code) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_parent(0x%08x/%d/%d.%d): update_dir_parent: %d\n",
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique, code);
#endif
dp = ERR_PTR(-ENOENT);
goto done;
}
}
}
tfid.Cell = vcp->f.fid.Cell;
tfid.Fid.Volume = vcp->f.fid.Fid.Volume;
tfid.Fid.Vnode = vcp->f.parent.vnode;
tfid.Fid.Unique = vcp->f.parent.unique;
}
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_parent(0x%08x/%d/%d.%d): => 0x%08x/%d/%d.%d\n",
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique,
tfid.Cell, tfid.Fid.Volume, tfid.Fid.Vnode, tfid.Fid.Unique);
#endif
dp = get_dentry_from_fid(credp, &tfid);
if (!dp) {
#ifdef OSI_EXPORT_DEBUG
printk("afs: get_parent(0x%08x/%d/%d.%d): no dentry\n",
vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique);
#endif
dp = ERR_PTR(-ENOENT);
}
done:
AFS_GUNLOCK();
crfree(credp);
return dp;
}
/* question: does afs_create need to set CDirty in the adp or the avc?
* I think we can get away without it, but I'm not sure. Note that
* afs_setattr is called in here for truncation.
*/
#ifdef AFS_SGI64_ENV
int
afs_create(OSI_VC_DECL(adp), char *aname, struct vattr *attrs, int flags,
int amode, struct vcache **avcp, afs_ucred_t *acred)
#else /* AFS_SGI64_ENV */
int
afs_create(OSI_VC_DECL(adp), char *aname, struct vattr *attrs,
enum vcexcl aexcl, int amode, struct vcache **avcp,
afs_ucred_t *acred)
#endif /* AFS_SGI64_ENV */
{
afs_int32 origCBs, origZaps, finalZaps;
struct vrequest *treq = NULL;
afs_int32 code;
struct afs_conn *tc;
struct VenusFid newFid;
struct AFSStoreStatus InStatus;
struct AFSFetchStatus *OutFidStatus, *OutDirStatus;
struct AFSVolSync tsync;
struct AFSCallBack CallBack;
afs_int32 now;
struct dcache *tdc;
afs_size_t offset, len;
struct server *hostp = 0;
struct vcache *tvc;
struct volume *volp = 0;
struct afs_fakestat_state fakestate;
struct rx_connection *rxconn;
XSTATS_DECLS;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_create);
OutFidStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
OutDirStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
memset(&InStatus, 0, sizeof(InStatus));
if ((code = afs_CreateReq(&treq, acred)))
goto done2;
afs_Trace3(afs_iclSetp, CM_TRACE_CREATE, ICL_TYPE_POINTER, adp,
ICL_TYPE_STRING, aname, ICL_TYPE_INT32, amode);
afs_InitFakeStat(&fakestate);
#ifdef AFS_SGI65_ENV
/* If avcp is passed not null, it's the old reference to this file.
* We can use this to avoid create races. For now, just decrement
* the reference count on it.
*/
if (*avcp) {
AFS_RELE(AFSTOV(*avcp));
*avcp = NULL;
}
#endif
if (strlen(aname) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done3;
}
if (!afs_ENameOK(aname)) {
code = EINVAL;
goto done3;
}
switch (attrs->va_type) {
case VBLK:
case VCHR:
#if !defined(AFS_SUN5_ENV)
case VSOCK:
#endif
case VFIFO:
/* We don't support special devices or FIFOs */
code = EINVAL;
goto done3;
default:
;
}
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&adp, &fakestate, treq);
if (code)
goto done;
tagain:
code = afs_VerifyVCache(adp, treq);
if (code)
goto done;
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
code = ENETDOWN;
goto done;
}
tdc = afs_GetDCache(adp, (afs_size_t) 0, treq, &offset, &len, 1);
ObtainWriteLock(&adp->lock, 135);
if (tdc)
ObtainSharedLock(&tdc->lock, 630);
/*
* Make sure that the data in the cache is current. We may have
* received a callback while we were waiting for the write lock.
*/
if (!(adp->f.states & CStatd)
|| (tdc && !hsame(adp->f.m.DataVersion, tdc->f.versionNo))) {
ReleaseWriteLock(&adp->lock);
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
goto tagain;
}
if (tdc) {
/* see if file already exists. If it does, we only set
* the size attributes (to handle O_TRUNC) */
code = afs_dir_Lookup(tdc, aname, &newFid.Fid); /* use dnlc first xxx */
if (code == 0) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
ReleaseWriteLock(&adp->lock);
#ifdef AFS_SGI64_ENV
if (flags & VEXCL) {
#else
if (aexcl != NONEXCL) {
#endif
code = EEXIST; /* file exists in excl mode open */
goto done;
}
/* found the file, so use it */
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
tvc = NULL;
if (newFid.Fid.Unique == 0) {
tvc = afs_LookupVCache(&newFid, treq, NULL, adp, aname);
}
if (!tvc) /* lookup failed or wasn't called */
tvc = afs_GetVCache(&newFid, treq, NULL, NULL);
if (tvc) {
/* if the thing exists, we need the right access to open it.
* we must check that here, since no other checks are
* made by the open system call */
len = attrs->va_size; /* only do the truncate */
/*
* We used to check always for READ access before; the
* problem is that we will fail if the existing file
* has mode -w-w-w, which is wrong.
*/
if ((amode & VREAD)
&& !afs_AccessOK(tvc, PRSFS_READ, treq, CHECK_MODE_BITS)) {
afs_PutVCache(tvc);
code = EACCES;
goto done;
}
#if defined(AFS_DARWIN80_ENV)
if ((amode & VWRITE) || VATTR_IS_ACTIVE(attrs, va_data_size))
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if ((amode & VWRITE) || (attrs->va_mask & AT_SIZE))
#else
if ((amode & VWRITE) || len != 0xffffffff)
#endif
{
/* needed for write access check */
tvc->f.parent.vnode = adp->f.fid.Fid.Vnode;
tvc->f.parent.unique = adp->f.fid.Fid.Unique;
/* need write mode for these guys */
if (!afs_AccessOK
(tvc, PRSFS_WRITE, treq, CHECK_MODE_BITS)) {
afs_PutVCache(tvc);
code = EACCES;
goto done;
}
}
#if defined(AFS_DARWIN80_ENV)
if (VATTR_IS_ACTIVE(attrs, va_data_size))
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if (attrs->va_mask & AT_SIZE)
#else
if (len != 0xffffffff)
#endif
{
if (vType(tvc) != VREG) {
afs_PutVCache(tvc);
code = EISDIR;
goto done;
}
/* do a truncate */
#if defined(AFS_DARWIN80_ENV)
VATTR_INIT(attrs);
VATTR_SET_SUPPORTED(attrs, va_data_size);
VATTR_SET_ACTIVE(attrs, va_data_size);
#elif defined(UKERNEL)
attrs->va_mask = ATTR_SIZE;
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
attrs->va_mask = AT_SIZE;
#else
VATTR_NULL(attrs);
#endif
attrs->va_size = len;
ObtainWriteLock(&tvc->lock, 136);
tvc->f.states |= CCreating;
ReleaseWriteLock(&tvc->lock);
#if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
#if defined(AFS_SGI64_ENV)
code =
afs_setattr(VNODE_TO_FIRST_BHV((vnode_t *) tvc),
attrs, 0, acred);
#else
code = afs_setattr(tvc, attrs, 0, acred);
#endif /* AFS_SGI64_ENV */
#else /* SUN5 || SGI */
code = afs_setattr(tvc, attrs, acred);
#endif /* SUN5 || SGI */
ObtainWriteLock(&tvc->lock, 137);
tvc->f.states &= ~CCreating;
ReleaseWriteLock(&tvc->lock);
if (code) {
afs_PutVCache(tvc);
goto done;
}
}
*avcp = tvc;
} else
code = ENOENT; /* shouldn't get here */
/* make sure vrefCount bumped only if code == 0 */
goto done;
}
}
/* if we create the file, we don't do any access checks, since
* that's how O_CREAT is supposed to work */
if (adp->f.states & CForeign) {
origCBs = afs_allCBs;
origZaps = afs_allZaps;
} else {
origCBs = afs_evenCBs; /* if changes, we don't really have a callback */
origZaps = afs_evenZaps; /* number of even numbered vnodes discarded */
}
InStatus.Mask = AFS_SETMODTIME | AFS_SETMODE | AFS_SETGROUP;
InStatus.ClientModTime = osi_Time();
InStatus.Group = (afs_int32) afs_cr_gid(acred);
if (AFS_NFSXLATORREQ(acred)) {
/*
* XXX The following is mainly used to fix a bug in the HP-UX
* nfs client where they create files with mode of 0 without
* doing any setattr later on to fix it. * XXX
*/
#if defined(AFS_AIX_ENV)
if (attrs->va_mode != -1) {
#else
#if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if (attrs->va_mask & AT_MODE) {
#else
if (attrs->va_mode != ((unsigned short)-1)) {
#endif
#endif
if (!attrs->va_mode)
attrs->va_mode = 0x1b6; /* XXX default mode: rw-rw-rw XXX */
}
}
if (!AFS_IS_DISCONNECTED) {
/* If not disconnected, connect to the server.*/
InStatus.UnixModeBits = attrs->va_mode & 0xffff; /* only care about protection bits */
do {
tc = afs_Conn(&adp->f.fid, treq, SHARED_LOCK, &rxconn);
if (tc) {
hostp = tc->srvr->server; /* remember for callback processing */
now = osi_Time();
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_CREATEFILE);
RX_AFS_GUNLOCK();
code =
RXAFS_CreateFile(rxconn, (struct AFSFid *)&adp->f.fid.Fid,
aname, &InStatus, (struct AFSFid *)
&newFid.Fid, OutFidStatus, OutDirStatus,
&CallBack, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
CallBack.ExpirationTime += now;
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &adp->f.fid, treq, AFS_STATS_FS_RPCIDX_CREATEFILE,
SHARED_LOCK, NULL));
if ((code == EEXIST || code == UAEEXIST) &&
#ifdef AFS_SGI64_ENV
!(flags & VEXCL)
#else /* AFS_SGI64_ENV */
aexcl == NONEXCL
#endif
) {
/* if we get an EEXIST in nonexcl mode, just do a lookup */
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
ReleaseWriteLock(&adp->lock);
#if defined(AFS_SGI64_ENV)
code = afs_lookup(VNODE_TO_FIRST_BHV((vnode_t *) adp), aname, avcp,
NULL, 0, NULL, acred);
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
code = afs_lookup(adp, aname, avcp, NULL, 0, NULL, acred);
#elif defined(UKERNEL)
code = afs_lookup(adp, aname, avcp, acred, 0);
#elif !defined(AFS_DARWIN_ENV)
code = afs_lookup(adp, aname, avcp, acred);
#endif
goto done;
}
if (code) {
if (code < 0) {
ObtainWriteLock(&afs_xcbhash, 488);
afs_DequeueCallback(adp);
adp->f.states &= ~CStatd;
ReleaseWriteLock(&afs_xcbhash);
osi_dnlc_purgedp(adp);
}
ReleaseWriteLock(&adp->lock);
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
goto done;
}
} else {
/* Generate a fake FID for disconnected mode. */
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
afs_GenFakeFid(&newFid, VREG, 1);
} /* if (!AFS_IS_DISCON_RW) */
/* otherwise, we should see if we can make the change to the dir locally */
if (tdc)
UpgradeSToWLock(&tdc->lock, 631);
if (AFS_IS_DISCON_RW || afs_LocalHero(adp, tdc, OutDirStatus, 1)) {
/* we can do it locally */
ObtainWriteLock(&afs_xdcache, 291);
code = afs_dir_Create(tdc, aname, &newFid.Fid);
ReleaseWriteLock(&afs_xdcache);
if (code) {
ZapDCE(tdc);
DZap(tdc);
}
}
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
if (AFS_IS_DISCON_RW)
adp->f.m.LinkCount++;
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
ReleaseWriteLock(&adp->lock);
volp = afs_FindVolume(&newFid, READ_LOCK);
/* New tricky optimistic callback handling algorithm for file creation works
* as follows. We create the file essentially with no locks set at all. File
* server may thus handle operations from others cache managers as well as from
* this very own cache manager that reference the file in question before
* we managed to create the cache entry. However, if anyone else changes
* any of the status information for a file, we'll see afs_evenCBs increase
* (files always have even fids). If someone on this workstation manages
* to do something to the file, they'll end up having to create a cache
* entry for the new file. Either we'll find it once we've got the afs_xvcache
* lock set, or it was also *deleted* the vnode before we got there, in which case
* we will find evenZaps has changed, too. Thus, we only assume we have the right
* status information if no callbacks or vnode removals have occurred to even
* numbered files from the time the call started until the time that we got the xvcache
* lock set. Of course, this also assumes that any call that modifies a file first
* gets a write lock on the file's vnode, but if that weren't true, the whole cache manager
* would fail, since no call would be able to update the local vnode status after modifying
* a file on a file server. */
ObtainWriteLock(&afs_xvcache, 138);
if (adp->f.states & CForeign)
finalZaps = afs_allZaps; /* do this before calling newvcache */
else
finalZaps = afs_evenZaps; /* do this before calling newvcache */
/* don't need to call RemoveVCB, since only path leaving a callback is the
* one where we pass through afs_NewVCache. Can't have queued a VCB unless
* we created and freed an entry between file creation time and here, and the
* freeing of the vnode will change evenZaps. Don't need to update the VLRU
* queue, since the find will only succeed in the event of a create race, and
* then the vcache will be at the front of the VLRU queue anyway... */
if (!(tvc = afs_FindVCache(&newFid, 0, DO_STATS))) {
tvc = afs_NewVCache(&newFid, hostp);
if (tvc) {
int finalCBs;
ObtainWriteLock(&tvc->lock, 139);
ObtainWriteLock(&afs_xcbhash, 489);
finalCBs = afs_evenCBs;
/* add the callback in */
if (adp->f.states & CForeign) {
tvc->f.states |= CForeign;
finalCBs = afs_allCBs;
}
if (origCBs == finalCBs && origZaps == finalZaps) {
tvc->f.states |= CStatd; /* we've fake entire thing, so don't stat */
tvc->f.states &= ~CBulkFetching;
if (!AFS_IS_DISCON_RW) {
tvc->cbExpires = CallBack.ExpirationTime;
afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), volp);
}
} else {
afs_DequeueCallback(tvc);
tvc->f.states &= ~(CStatd | CUnique);
tvc->callback = 0;
if (tvc->f.fid.Fid.Vnode & 1 || (vType(tvc) == VDIR))
osi_dnlc_purgedp(tvc);
}
ReleaseWriteLock(&afs_xcbhash);
if (AFS_IS_DISCON_RW) {
afs_DisconAddDirty(tvc, VDisconCreate, 0);
afs_GenDisconStatus(adp, tvc, &newFid, attrs, treq, VREG);
} else {
afs_ProcessFS(tvc, OutFidStatus, treq);
}
tvc->f.parent.vnode = adp->f.fid.Fid.Vnode;
tvc->f.parent.unique = adp->f.fid.Fid.Unique;
#if !defined(UKERNEL)
if (volp && (volp->states & VPartVisible))
tvc->f.states |= CPartVisible;
#endif
ReleaseWriteLock(&tvc->lock);
*avcp = tvc;
code = 0;
} else
code = ENOENT;
} else {
/* otherwise cache entry already exists, someone else must
* have created it. Comments used to say: "don't need write
* lock to *clear* these flags" but we should do it anyway.
* Code used to clear stat bit and callback, but I don't see
* the point -- we didn't have a create race, somebody else just
* snuck into NewVCache before we got here, probably a racing
* lookup.
*/
*avcp = tvc;
code = 0;
}
ReleaseWriteLock(&afs_xvcache);
done:
AFS_DISCON_UNLOCK();
done3:
if (volp)
afs_PutVolume(volp, READ_LOCK);
if (code == 0) {
if (afs_mariner)
afs_AddMarinerName(aname, *avcp);
/* return the new status in vattr */
afs_CopyOutAttrs(*avcp, attrs);
if (afs_mariner)
afs_MarinerLog("store$Creating", *avcp);
}
afs_PutFakeStat(&fakestate);
code = afs_CheckCode(code, treq, 20);
afs_DestroyReq(treq);
done2:
osi_FreeSmallSpace(OutFidStatus);
osi_FreeSmallSpace(OutDirStatus);
return code;
}
/*
* Check to see if we can track the change locally: requires that
* we have sufficiently recent info in data cache. If so, we
* know the new DataVersion number, and place it correctly in both the
* data and stat cache entries. This routine returns 1 if we should
* do the operation locally, and 0 otherwise.
*
* This routine must be called with the stat cache entry write-locked,
* and dcache entry write-locked.
*/
int
afs_LocalHero(struct vcache *avc, struct dcache *adc,
AFSFetchStatus * astat, int aincr)
{
afs_int32 ok;
afs_hyper_t avers;
AFS_STATCNT(afs_LocalHero);
hset64(avers, astat->dataVersionHigh, astat->DataVersion);
/* avers *is* the version number now, no matter what */
if (adc) {
/* does what's in the dcache *now* match what's in the vcache *now*,
* and do we have a valid callback? if not, our local copy is not "ok" */
ok = (hsame(avc->f.m.DataVersion, adc->f.versionNo) && avc->callback
&& (avc->f.states & CStatd) && avc->cbExpires >= osi_Time());
} else {
ok = 0;
}
if (ok) {
/* check that the DV on the server is what we expect it to be */
afs_hyper_t newDV;
hset(newDV, adc->f.versionNo);
hadd32(newDV, aincr);
if (!hsame(avers, newDV)) {
ok = 0;
}
}
#if defined(AFS_SGI_ENV)
osi_Assert(avc->v.v_type == VDIR);
#endif
/* The bulk status code used the length as a sequence number. */
/* Don't update the vcache entry unless the stats are current. */
if (avc->f.states & CStatd) {
hset(avc->f.m.DataVersion, avers);
#ifdef AFS_64BIT_CLIENT
FillInt64(avc->f.m.Length, astat->Length_hi, astat->Length);
#else /* AFS_64BIT_CLIENT */
avc->f.m.Length = astat->Length;
#endif /* AFS_64BIT_CLIENT */
avc->f.m.Date = astat->ClientModTime;
}
if (ok) {
/* we've been tracking things correctly */
adc->dflags |= DFEntryMod;
adc->f.versionNo = avers;
return 1;
} else {
if (adc) {
ZapDCE(adc);
DZap(adc);
}
if (avc->f.states & CStatd) {
osi_dnlc_purgedp(avc);
}
return 0;
}
}
afs_link(struct vcache *avc, OSI_VC_DECL(adp), char *aname,
afs_ucred_t *acred)
#endif
{
struct vrequest treq;
struct dcache *tdc;
afs_int32 code;
struct afs_conn *tc;
afs_size_t offset, len;
struct AFSFetchStatus OutFidStatus, OutDirStatus;
struct AFSVolSync tsync;
struct afs_fakestat_state vfakestate, dfakestate;
struct rx_connection *rxconn;
XSTATS_DECLS;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_link);
afs_Trace3(afs_iclSetp, CM_TRACE_LINK, ICL_TYPE_POINTER, adp,
ICL_TYPE_POINTER, avc, ICL_TYPE_STRING, aname);
/* create a hard link; new entry is aname in dir adp */
if ((code = afs_InitReq(&treq, acred)))
goto done2;
afs_InitFakeStat(&vfakestate);
afs_InitFakeStat(&dfakestate);
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&avc, &vfakestate, &treq);
if (code)
goto done;
code = afs_EvalFakeStat(&adp, &dfakestate, &treq);
if (code)
goto done;
if (avc->f.fid.Cell != adp->f.fid.Cell
|| avc->f.fid.Fid.Volume != adp->f.fid.Fid.Volume) {
code = EXDEV;
goto done;
}
if (strlen(aname) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done;
}
code = afs_VerifyVCache(adp, &treq);
if (code)
goto done;
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
if (AFS_IS_DISCONNECTED) {
code = ENETDOWN;
goto done;
}
tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &offset, &len, 1); /* test for error below */
ObtainWriteLock(&adp->lock, 145);
do {
tc = afs_Conn(&adp->f.fid, &treq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_LINK);
RX_AFS_GUNLOCK();
code =
RXAFS_Link(rxconn, (struct AFSFid *)&adp->f.fid.Fid, aname,
(struct AFSFid *)&avc->f.fid.Fid, &OutFidStatus,
&OutDirStatus, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &adp->f.fid, &treq, AFS_STATS_FS_RPCIDX_LINK,
SHARED_LOCK, NULL));
if (code) {
if (tdc)
afs_PutDCache(tdc);
if (code < 0) {
ObtainWriteLock(&afs_xcbhash, 492);
afs_DequeueCallback(adp);
adp->f.states &= ~CStatd;
ReleaseWriteLock(&afs_xcbhash);
osi_dnlc_purgedp(adp);
}
ReleaseWriteLock(&adp->lock);
goto done;
}
if (tdc)
ObtainWriteLock(&tdc->lock, 635);
if (afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
/* we can do it locally */
ObtainWriteLock(&afs_xdcache, 290);
code = afs_dir_Create(tdc, aname, &avc->f.fid.Fid);
ReleaseWriteLock(&afs_xdcache);
if (code) {
ZapDCE(tdc); /* surprise error -- invalid value */
DZap(tdc);
}
}
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc); /* drop ref count */
}
ReleaseWriteLock(&adp->lock);
ObtainWriteLock(&avc->lock, 146); /* correct link count */
/* we could lock both dir and file; since we get the new fid
* status back, you'd think we could put it in the cache status
* entry at that point. Note that if we don't lock the file over
* the rpc call, we have no guarantee that the status info
* returned in ustat is the most recent to store in the file's
* cache entry */
ObtainWriteLock(&afs_xcbhash, 493);
afs_DequeueCallback(avc);
avc->f.states &= ~CStatd; /* don't really know new link count */
ReleaseWriteLock(&afs_xcbhash);
if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
osi_dnlc_purgedp(avc);
ReleaseWriteLock(&avc->lock);
code = 0;
done:
code = afs_CheckCode(code, &treq, 24);
afs_PutFakeStat(&vfakestate);
afs_PutFakeStat(&dfakestate);
AFS_DISCON_UNLOCK();
done2:
return code;
}
