April 2005 - Darwin-kernel - lists.apple.com

Re: Writing to disk using filter scheme driver
by Parav Pandit 04 Apr '05

04 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi Yogesh, ffProvider = OSDynamicCast(com_MySoftwareCompany_driver_MyFilterScheme, fProvider); // is this a correct way of casting??? Yes, but you don't need to type cast because fPRovider is already of type com_MySoftwareCompany_driver_MyFilterScheme. > But i am still facing the same problem that "no matching function > IOService::DoDriverWrite()" //com_MySoftwareCompany_driver_MyFilterScheme* fProvider; If this is compilation error, it looks to me that your driver class com_MySoftwareCompany_driver_MyFilterScheme ( NOT com_MySoftwareCompany_MyUserClient) doesn't have declaration and definition of DoDriverWrite() function. and the compiler asking to it's top base class IOServive whether it has the function or not. Regards, Parav Pandit ________________________________________________________________________ Yahoo! India Matrimony: Find your life partner online Go to: http://yahoo.shaadi.com/india-matrimony _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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m_devget
by Carl Smith 04 Apr '05

04 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: AcU5UhTL7o/Wb/r0SV6Q1PecuDExfQ== Thread-topic: m_devget _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Writing to disk using filter scheme driver
by Yogesh P 04 Apr '05

04 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi Dan, I have make some changes in my code as follows. UserkernelShared.h includes the following structure. typedef struct MySampleStruct { UInt32 size; char* buff; } MySampleStruct; // these are the User Client method names enum { kMyUserClientOpen, kMyUserClientClose, kMyDoWrite, kMyDoRead, kMyNumberOfMethods }; In main function of userspace application i am calling the MyDoWrite function as follows kernResult = MyDoWrite(dataPort); if (kernResult != KERN_SUCCESS) { printf("\n kMyDoWrite returned %d\n", kernResult); fflush(stdout); } The definition of MyDoWrite is as follows. MyDoWrite(io_connect_t connect) { kern_return_t kernResult; MySampleStruct sampleStruct; char *buf; UInt32 size; size = kBufSize; //kBufSize = 512 buf = malloc(sizeof(char) * kBufSize); bzero(buf, sizeof(char) * kBufSize); strcpy(buf, "Hello MAC.OS.X"); sampleStruct.size = size; sampleStruct.buff = buf; IOByteCount structSize = sizeof(MySampleStruct); if (!connect) { return kIOReturnNoDevice; } else { kernResult = IOConnectMethodScalarIStructureI(connect, kMyDoWrite, 0, structSize, &sampleStruct ); } if (kernResult == kIOReturnSuccess) { printf("\n kMyDoWrite was successful..........\n"); } return kernResult; } My Userclient.h includes the following code. class com_MySoftwareCompany_MyUserClient : public IOUserClient //derived from IOUserClient IOService* fProvider; //previously i was mentioned //com_MySoftwareCompany_driver_MyFilterSchemeheme My Userclient.cpp includes the following code. IOExternalMethod * com_MySoftwareCompany_MyUserClient::getTargetAndMethodForIndex(IOService ** target, UInt32 index) { { // kMyDoWrite NULL, (IOMethod) &com_MySoftwareCompany_MyUserClient::myDoWrite, kIOUCScalarIStructI, 0, sizeof(MySampleStruct) },*/ } IOReturn com_MySoftwareCompany_MyUserClient::myDoWrite(MySampleStruct * vInStruct, UInt32 * structSize) { IOReturn retWrite = kIOReturnSuccess; char *buf; UInt32 Size; IOService* ffProvider; memset(buf, 0x0, 512); buf = vInStruct->buff; Size = vInStruct->size; if ( *structSize != sizeof(MySampleStruct)) return kIOReturnBadArgument; if (fProvider && !isInactive()) { IOMemoryDescriptor *mem = IOMemoryDescriptor::withAddress(buf, Size, kIODirectionOut, fTask); if (mem) { retWrite = mem->prepare(); if(kIOReturnSuccess == retWrite) { ffProvider = OSDynamicCast(com_MySoftwareCompany_driver_MyFilterScheme, fProvider); // is this a correct way of casting??? if (!ffProvider) { return false; } else { //retWrite = ffProvider->write(provider, 512, mem, completion); retWrite = ffProvider->DoDriverWrite(mem); } } mem->complete(); mem->release(); } else { retWrite = kIOReturnNoMemory; } release(); } else { retWrite = kIOReturnNotAttached; } if (kIOReturnSuccess != retWrite) { IOLog("\n myDoWrite returned = %d\n", retWrite); } return retWrite; } But i am still facing the same problem that "no matching function IOService::DoDriverWrite()" And if i have to call driver routine from my userclient how should i call them??? Thanks in Advance, Yogesh Pahilwan On Thu, 2005-03-31 at 02:44, Dan Markarian wrote: > Hi Parav, > > I believe I see the disconnect. I saw MySampleStruct and was under > the impression that MySampleStruct is what carries the "buf" address > and the "buf" size into the kernel. It seems, rather, that it passes > the "buf" address and "buf" size as a variable-size structure across > the user client interface. You might wish to note that technique is > limited to 4 kB, I believe, and does involve a copy across the kernel > boundary. I am not sure what the problem is though offhand. It > might be one of: > > > > size = kBufSize; > > size = 1024; > > > > bzero(buf, sizeof(char) * 1048576); > > bzero(buf, sizeof(char) * 1024); > > > > IOMemoryDescriptor *mem = IOMemoryDescriptor::withAddress(buf, > > > 1024, > > > kIODirectionOut); > > IOMemoryDescriptor *mem = IOMemoryDescriptor::withAddress(buf, > size, > kIODirectionOut); > > Dan > > On 30 Mar 2005, at 12:44 PM, Parav Pandit wrote: > > > > com_MySoftwareCompany_driver_MyFilterScheme* fProvider; > > > > I am sorry, I haven't look the code properly. > > you have fProvider of your filterScheme class. > > > > fTask would tell to map in kernel userClient context for calling > > task - fTask but than how this would solve the problem of calling > > the driver function? > > > > Please help me to understand. > > fTask is the application task which has made the code to driver. is > > this correct? > > We need to share memory between kernel task and user space, so why > > to give fTask rather than kernel_task? > > I couldn't find the answer from the Writing custom user client > > docuement. > > > > Regards, > > Parav Pandit > > > > > > > > Dan Markarian <markarian(a)apple.com> wrote: > > Hi Yogesh, > > > > > IOMemoryDescriptor *mem = IOMemoryDescriptor::withAddress(buf, > > > 1024, kIODirectionOut); > > > > IOMemoryDescriptor *mem = IOMemoryDescriptor::withAddress(buf, > > 1024, kIODirectionOut, fTask); > > > > Dan > > > > On 30 Mar 2005, at 7:54 AM, Yogesh P wrote: > > > > > 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"); > > > > > > 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; > > > > > > 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??? > > > > > > 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(a)lists.apple.com) > > > Help/Unsubscribe/Update your Subscription: > > > http://lists.apple.com/mailman/options/darwin-kernel/markarian% > > > 40apple.com > > > > > > This email sent to markarian(a)apple.com > > > > > > _______________________________________________ > > Do not post admin requests to the list. They will be ignored. > > Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) > > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/darwin-kernel/parav_pandit% > > 40yahoo.co.in > > > > This email sent to parav_pandit(a)yahoo.co.in > > Yahoo! India Matrimony: Find your life partner online. > > ---- > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/darwin-kernel/sayyad.asif%40spsoftin… > > This email sent to sayyad.asif(a)spsoftindia.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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dlil_attah_interface_filter
by Carl Smith 02 Apr '05

02 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: AcUqAULwTND+D+BgSmOTT5EI+Sg08ANyu7LQ Thread-topic: dlil_attah_interface_filter In my NKE I have attached some filtering using 'dlil_attach_interface_filter' and pointed my call back functions via this call. The filtering works find and in my call back function, My_if_input(caddr_t cookie, struct ifnet **ifnet_ptr, struct mbuf **mbuf_ptr), I want to get/look at the filter ID of the calling filter. This is the value that was obtained in the previous calling to 'dlil_attach_interface_filter'. Is there some way to obtain this 'filter ID' from within the callback function My_if_input? I was thinking that the information might be contained in the 'cookie' parameter. I need this 'filter ID' to use in my call to dlil_inject_if_input. Thanks Carl _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: How to convert from an OSString to an OSNumber ?
by Dean Reece 01 Apr '05

01 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Cheers, - Dean No OSDynamicCast doesn't do anything at all like this. I'd suggest looking at the docs of OSNumber construction. Godfrey On Apr 1, , at 14:29, Brian Jorgage wrote: I am passing in a sequence of numbers as an OSString. I am able to parse out the five fields based on a delimiter character. So now I have five strings that are actually representing numeric data. I am trying to convert the strings into OSNumbers but without success. OSDynamicCast() does not seem to allow operations of type: OSDynamicCast(OSNumber, OSString) or OSDynamicCast(OSNumber, OSString->getCStringNoCopy()) Can anyone provide me w/some help in this ? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… Or, if all you want to is get 5 ints, then just use sscanf() on your original string (using getCStringNoCopy) to grab all 5 ints in a single operation. sscanf(), as well as strtol() and friends are available in com.apple.kernel.libkern and com.apple.kpi.libkern. On Apr 1, 2005, at 2:39 PM, Godfrey van der Linden wrote: It's intent is for you to get a OSObject * pointer and work out what class it is. It will not do conversion only validation. _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/ dean.reece%40apple.com This email sent to dean.reece(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: How to convert from an OSString to an OSNumber ?
by Godfrey van der Linden 01 Apr '05

01 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com No OSDynamicCast doesn't do anything at all like this. I'd suggest looking at the docs of OSNumber construction. Godfrey On Apr 1, , at 14:29, Brian Jorgage wrote: I am passing in a sequence of numbers as an OSString. I am able to parse out the five fields based on a delimiter character. So now I have five strings that are actually representing numeric data. I am trying to convert the strings into OSNumbers but without success. OSDynamicCast() does not seem to allow operations of type: OSDynamicCast(OSNumber, OSString) or OSDynamicCast(OSNumber, OSString->getCStringNoCopy()) Can anyone provide me w/some help in this ? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… It's intent is for you to get a OSObject * pointer and work out what class it is. It will not do conversion only validation. This email sent to site_archiver(a)lists.apple.com

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How to convert from an OSString to an OSNumber ?
by Brian Jorgage 01 Apr '05

01 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com I am passing in a sequence of numbers as an OSString. I am able to parse out the five fields based on a delimiter character. So now I have five strings that are actually representing numeric data. I am trying to convert the strings into OSNumbers but without success. OSDynamicCast() does not seem to allow operations of type: OSDynamicCast(OSNumber, OSString) or OSDynamicCast(OSNumber, OSString->getCStringNoCopy()) Can anyone provide me w/some help in this ? Thanks, Brian Jorgage _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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