site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Hi Yogesh, Dan On 30 Mar 2005, at 7:54 AM, Yogesh P wrote: I want to write this "buf" to the disk through userclient. // This shows an example of calling a user client's open method. kernResult = MyDoWrite(dataPort, buf, size); if (kernResult != KERN_SUCCESS) { printf("\n kMyDoWrite returned %d\n", kernResult); // This closes the connection to our user client and destroys the connect handle. IOServiceClose(dataPort); return 0; } The definition of MyDoWrite is as follows. kern_return_t MyDoWrite(io_connect_t connect, void *buf, UInt32 size) { kern_return_t kernResult; if (!connect){ return kIOReturnNoDevice; } else { kernResult = IOConnectMethodScalarIStructureI(connect, kMyDoWrite, 0, size, buf ); } if (kernResult == kIOReturnSuccess){ printf("\n kMyDoWrite was successful..........\n"); } return kernResult; } My Userclient.h and Userclient.cpp includes the following code. com_MySoftwareCompany_driver_MyFilterScheme* fProvider; Any help, certainly help me in solving this problem. Thanks in advance. Yogesh Pahilwan _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... IOMemoryDescriptor *mem = IOMemoryDescriptor::withAddress(buf, 1024, kIODirectionOut); IOMemoryDescriptor *mem = IOMemoryDescriptor::withAddress(buf, 1024, kIODirectionOut, fTask); Hi folks, I have written a filter scheme driver,userclient and userspace application tool for doing read/write operations on IOMedia partitions. I have successfully send a structure from userspace to kernelspace through userclient.But when i try to read/write a buffer from userspace to kernel space,i am not able to map userspace buffer to kernel address space. I am specifying my code here. UserkernelShared.h includes the following structure. typedef struct MySampleStruct { UInt32 size; void* buff; } MySampleStruct; In main function of userspace application i am calling the SPSOFT_Write function as follows. char *buf; UInt32 size; size = kBufSize; buf = malloc(sizeof(char) * 1024); bzero(buf, sizeof(char) * 1048576); strcpy(buf, " Hello MACOSX"); IOExternalMethod * com_MySoftwareCompany_MyUserClient::getTargetAndMethodForIndex (IOService ** target, UInt32 index) { { // kMyDoWrite NULL, (IOMethod) &com_MySoftwareCompany_MyUserClient::myDoWrite, kIOUCScalarIStructI, 0, 0xffffffff }, } IOReturn com_MySoftwareCompany_MyUserClient::myDoWrite(void* buf, UInt32 size) { IOReturn retWrite = kIOReturnSuccess; UInt32 Size = size; if (fProvider && !isInactive()){ IOMemoryDescriptor *mem = IOMemoryDescriptor::withAddress(buf, 1024, kIODirectionOut); if (mem){ retWrite = mem->prepare(); if(kIOReturnSuccess == retWrite){ retWrite = fProvider->myDoWrite (mem,Size); //when i call this driver function it gives me the error as IOService::fProvider has no function myDoWrite. } mem->complete(); mem->release(); }else{ retWrite = kIOReturnNoMemory; } release(); } How should i call the filter scheme driver read/write routines from my userclient?? Or is there any sample code of read/write for filter scheme driver??? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/markarian% 40apple.com This email sent to markarian@apple.com This email sent to site_archiver@lists.apple.com