void VFS_CloseAllUserHandles(struct sProcess *Process)
{
const int max_handles = *Threads_GetMaxFD(Process);
ENTER("pProcess", Process);
if( max_handles >= PAGE_SIZE / sizeof(tVFS_Handle) )
TODO("More than a page of handles");
tVFS_Handle *handles = MM_MapTempFromProc(Process, gaUserHandles);
LOG("handles=%p", handles);
// Check if this process has any handles
if( !handles ) {
LEAVE('-');
return ;
}
for( int i = 0; i < max_handles; i ++ )
{
tVFS_Handle *h = &handles[i];
LOG("handles[%i].Node = %p", i, h->Node);
if( !h->Node )
continue ;
_CloseNode(h->Node);
h->Node = NULL;
}
MM_FreeTemp(handles);
LEAVE('-');
}
void VFS_CloseAllUserHandles(void)
{
int i;
int max_handles = *Threads_GetMaxFD();
// Check if this process has any handles
if( MM_GetPhysAddr( gaUserHandles ) == 0 )
return ;
for( i = 0; i < max_handles; i ++ )
{
tVFS_Handle *h;
h = &gaUserHandles[i];
if( !h->Node )
continue ;
_CloseNode(h->Node);
}
}
void VFS_FreeSavedHandles(int NumFDs, void *Handles)
{
tVFS_Handle *handles = Handles;
int i;
// NULL = nothing to do
if( !Handles )
return ;
// Dereference all saved nodes
for( i = 0; i < NumFDs; i ++ )
{
tVFS_Handle *h = &handles[i];
if( !h->Node )
continue ;
_CloseNode(h->Node);
ASSERT(h->Mount->OpenHandleCount > 0);
LOG("dec. mntpt '%s' to %i", h->Mount->MountPoint, h->Mount->OpenHandleCount-1);
h->Mount->OpenHandleCount --;
}
free( Handles );
}
/**
* \fn int VFS_MkNod(char *Path, Uint Flags)
* \brief Create a new node in a directory
* \param Path Path of new node
* \param Flags Flags to apply to the node
*/
int VFS_MkNod(const char *Path, Uint Flags)
{
tVFS_Mount *mountpt;
char *absPath, *name;
int pos = 0, oldpos = 0;
int next = 0;
tVFS_Node *parent;
tVFS_Node *ret;
ENTER("sPath xFlags", Path, Flags);
absPath = VFS_GetAbsPath(Path);
LOG("absPath = '%s'", absPath);
while( (next = strpos(&absPath[pos+1], '/')) != -1 ) {
LOG("next = %i", next);
pos += next+1;
LOG("pos = %i", pos);
oldpos = pos;
}
absPath[oldpos] = '\0'; // Mutilate path
name = &absPath[oldpos+1];
LOG("absPath = '%s', name = '%s'", absPath, name);
// Check for root
if(absPath[0] == '\0')
parent = VFS_ParsePath("/", NULL, &mountpt);
else
parent = VFS_ParsePath(absPath, NULL, &mountpt);
LOG("parent = %p", parent);
if(!parent) {
errno = ENOENT;
goto _error;
}
// Permissions Check
if( !VFS_CheckACL(parent, VFS_PERM_EXECUTE|VFS_PERM_WRITE) ) {
errno = EACCES;
goto _error;
}
LOG("parent = %p", parent);
if(!parent->Type || !parent->Type->MkNod) {
Log_Warning("VFS", "VFS_MkNod - Directory has no MkNod method");
errno = ENOTDIR;
goto _error;
}
// Create node
ret = parent->Type->MkNod(parent, name, Flags);
_CloseNode(ret);
// Free allocated string
free(absPath);
// Free Parent
ASSERT(mountpt->OpenHandleCount>0);
mountpt->OpenHandleCount --;
_CloseNode(parent);
// Return whatever the driver said
LEAVE('i', ret==NULL);
return ret==NULL;
_error:
if( parent ) {
_CloseNode(parent);
ASSERT(mountpt->OpenHandleCount>0);
mountpt->OpenHandleCount --;
}
free(absPath);
LEAVE('i', -1);
return -1;
}
void VFS_RestoreHandles(int NumFDs, void *Handles)
{
tVFS_Handle *handles = Handles;
const int max_handles = *Threads_GetMaxFD(NULL);
// NULL = nothing to do
if( !Handles )
return ;
if( NumFDs > max_handles ) {
Log_Notice("VFS", "RestoreHandles: Capping from %i FDs to %i", NumFDs, max_handles);
NumFDs = max_handles;
}
// Allocate user handle area (and dereference existing handles)
for( int i = 0; i < NumFDs; i ++ )
{
tVFS_Handle *h = &gaUserHandles[i];
if( !MM_GetPhysAddr(h) )
{
void *pg = (void*)( (tVAddr)h & ~(PAGE_SIZE-1) );
if( !MM_Allocate( pg ) )
{
// OOM?
return ;
}
memset(pg, 0, PAGE_SIZE);
}
// Safe to dereference, as Threads_CloneTCB references handles
#if 1
else
{
if(h->Node)
{
_CloseNode(h->Node);
h->Mount->OpenHandleCount --;
}
}
#endif
}
// Clean up existing
// Restore handles
memcpy( gaUserHandles, handles, NumFDs * sizeof(tVFS_Handle) );
// Reference when copied
for( int i = 0; i < NumFDs; i ++ )
{
tVFS_Handle *h = &gaUserHandles[i];
if( !h->Node )
continue ;
// Debug("VFS_RestoreHandles: %i %p", i, h->Node);
_ReferenceNode(h->Node);
h->Mount->OpenHandleCount ++;
}
for( int i = NumFDs; i < max_handles; i ++ )
{
gaUserHandles[i].Node = NULL;
}
}
