October 2006 - Darwin-kernel

Re: IOServiceOpen fails
by Michael Smith 13 Oct '06

13 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Oct 12, 2006, at 9:38 PM, sanjay yaragatti wrote: I have written a kernel driver.Now want to talk to it through a userclient.My user space application is a cocoa application which calls IOServiceOpen() to establish a connection with the userclient.The call too IOServiceOpen fails and returning a value of hex value of 0xe00002c7 (-536870201 in decimal).But the This is kIOReturnUnsupported. Have you implemented a UserClient subclass and registered it? For example: = Mike _______________________________________________ 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.… // set up our userClientClass name, used when user clients // request a connection to the driver userClient = OSSymbol::withCStringNoCopy ("com_company_MyUserClient"); if (userClient == NULL) { error("could not allocate userClient name"); goto fail; } setProperty(gIOUserClientClassKey, (OSObject *)userClient); userClient->release(); This email sent to site_archiver(a)lists.apple.com

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IOServiceOpen fails
by sanjay yaragatti 13 Oct '06

13 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.in; h=Message-ID:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=AeCVy3N3TpDBERTl2Dc6/UPVrEgyCRVAXcP7NoVIcHYQrGGoxA5Xc6ztCbBOqmqFg+Q0GO6WrVhp0mVc5u7VzV2g94wxOqFWhFM/0hjGPnrBsA+zjXkmVo0gQs4vggW6aUae9dCthQ7lrRpZ4Ide20ZqMsEm0lHAihR1PtWidMY= ; Hi, I have written a kernel driver.Now want to talk to it through a userclient.My user space application is a cocoa application which calls IOServiceOpen() to establish a connection with the userclient.The call too IOServiceOpen fails and returning a value of hex value of 0xe00002c7 (-536870201 in decimal).But the API's IOMasterPort(),IOServiceMatching() & IOServiceGetMatchingServices() are returning success.Can anybody help me out in this matter. I have attached the sample code.. int sample() { kern_return_t kernResult; mach_port_t masterPort; io_service_t serviceObject; io_connect_t dataPort; io_iterator_t iterator; CFDictionaryRef classToMatch; kernResult = IOMasterPort(MACH_PORT_NULL,&masterPort); if (kernResult != KERN_SUCCESS) { printf( "IOMasterPort returned %d\n", kernResult); return 0; } classToMatch=IOServiceMatching(kMyDriversIOKitClassName); if (classToMatch == NULL) { printf( "IOServiceMatching returned a NULL dictionary.\n"); return 0; } kernResult = IOServiceGetMatchingServices(masterPort, classToMatch, &iterator); if (kernResult != KERN_SUCCESS) { printf("IOServiceGetMatchingServices returned %d\n\n", kernResult); return 0; } // Get the first item in the iterator. serviceObject = IOIteratorNext(iterator); // Release the io_iterator_t now that we're done with it. IOObjectRelease(iterator); if (!serviceObject) { printf("Couldn't find any matches.\n"); return 0; } // This call will cause the user client to be instantiated. kernResult = IOServiceOpen(serviceObject, mach_task_self(), 0, &dataPort); if (kernResult != KERN_SUCCESS) { printf("IOServiceOpen returned %d\n", kernResult); return 0; } Regards, Sanjay __________________________________________________________ Yahoo! India Answers: Share what you know. Learn something new http://in.answers.yahoo.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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Re: Socket permissions ???
by Quinn 12 Oct '06

12 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com btw The SockPathMode I used was 511 (0777); you don't need to specify S_IFSOCK. S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ 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.… At 14:28 -0700 11/10/06, Ravi wrote: I have a .plist file for my daemon as follows:- What version of Mac OS X are you trying this on? This should work on all Intel-based Macintosh computers, but for PowerPC-based computers it only started working in 10.4.6. However, on 10.4.6 and later it works a charm (at least on the machine's I've tested with). This email sent to site_archiver(a)lists.apple.com

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Re: Socket permissions ???
by Ravi 11 Oct '06

11 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Corrected a typo below. On Oct 11, 2006, at 2:28 PM, Ravi wrote: Hi, I have a .plist file for my daemon as follows:- Thanks _______________________________________________ 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.… <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Debug</key> <false/> <key>Label</key> <string>com.<com-name>.daemon.ABC</string> <key>OnDemand</key> <true/> <key>ProgramArguments</key> <array> <string>/Users/<usr-name>/Debug/ABC</string> </array> <key>ServiceIPC</key> <true/> <key>Sockets</key> <dict> <key>RegistryDomainSocket</key> <dict> <key>SockFamily</key> <string>Unix</string> <key>SockPassive</key> <false/> <key>SockPathMode</key> <integer>49663</integer> <key>SockPathName</key> <string>/tmp/MYSOCKET</string> </dict> </dict> </dict> </plist> The socket permissions for /tmp/MYSOCKET should be set to rwx for all, but the socket gets created with the permissions as srwxr-xr-x . Tried using *decimal 777 for SockPathMode* too. But it doesnt seem to have any change. My daemon is required to run in background and should be able to respond to request from any user through a UI. *If required how can I explicitly set the permissions of my socket to srwxrwxrwx after creating it, in my app? _______________________________________________ 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/ryadav% 40appliedidentity.com This email sent to ryadav(a)appliedidentity.com This email sent to site_archiver(a)lists.apple.com

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Socket permissions ???
by Ravi 11 Oct '06

11 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi, I have a .plist file for my daemon as follows:- Thanks _______________________________________________ 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.… <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http:// www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Debug</key> <false/> <key>Label</key> <string>com.<com-name>.daemon.ABC</string> <key>OnDemand</key> <true/> <key>ProgramArguments</key> <array> <string>/Users/<usr-name>/Debug/ABC</string> </array> <key>ServiceIPC</key> <true/> <key>Sockets</key> <dict> <key>RegistryDomainSocket</key> <dict> <key>SockFamily</key> <string>Unix</string> <key>SockPassive</key> <false/> <key>SockPathMode</key> <integer>49663</integer> <key>SockPathName</key> <string>/tmp/MYSOCKET</string> </dict> </dict> </dict> </plist> The socket permissions for /tmp/MYSOCKET should be set to rwx for all, but the socket gets created with the permissions as srwxr-xr-x . Tried using *decimal 777 for SockPathName* too. But it doesnt seem to have any change. My daemon is required to run in background and should be able to respond to request from any user through a UI. *If required how can I explicitly set the permissions of my socket to srwxrwxrwx after creating it, in my app? This email sent to site_archiver(a)lists.apple.com

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Re: Determining disk activity per volume
by Quinn 11 Oct '06

11 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com <http://developer.apple.com/qa/qa2001/qa1242.html> <http://www.opensource.apple.com/darwinsource/10.4/system_cmds-336/iostat.tp…> S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware At 13:48 +0100 11/10/06, Arvind Dalvi wrote: wondering....if I/O Media Filter puts the application on hot path, how are filesystem filter drivers (example: on-access antivirus scanners) implemented ? Mac OS X does not support file system filter drivers ("stacking file systems" in Mac OS X terminology). See Q&A 1242 for the details. On-the-fly AV scanners are mostly implemented at the kauth level. Kauth tells you when files are opened and closed [1], not when individual reads and writes are done. Getting into the read/write hot path just to gather statistics is not recommended. There are plenty of other mechanisms. For example: At 9:12 -0700 11/10/06, Shawn Erickson wrote: IOBlockStorageDriver already does this and that information is readable via the ioregistry. And this is exactly what <x-man-page://8/iostat> does. Take a look at the "devstats" routine in the following source file. [1] Actually, that's a simplification. Some kauth operations are actual notifications (stuff in the "file operation scope"), but others (stuff in the "vnode scope") only occur when an operation is authorised, and authorisations can be cached (so there's no one-to-one correspondence between operations and kauth callback invocations). _______________________________________________ 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: Determining disk activity per volume
by Michael Smith 11 Oct '06

11 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Oct 11, 2006, at 5:48 AM, Arvind Dalvi wrote: = Mike _______________________________________________ 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.… wondering....if I/O Media Filter puts the application on hot path, how are filesystem filter drivers (example: on-access antivirus scanners) implemented ? "Antivirus" scanning is not done at the block I/O layer on Mac OS X, as there are no literal disk blocks that are directly read and executed by any part of the system. This email sent to site_archiver(a)lists.apple.com

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Re: Determining disk activity per volume
by Shawn Erickson 11 Oct '06

11 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.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/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Determining disk activity per volume
by Michael Cashwell 11 Oct '06

11 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Oct 11, 2006, at 3:36 AM, Michael Smith wrote: On Oct 10, 2006, at 10:19 PM, Arvind Dalvi wrote: -Mike _______________________________________________ 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.… how about developing I/O Media Filter? "An I/O Media Object acts as a channel for all I/O that goes to the storage underlying it" http://lists.apple.com/archives/Darwin-development/2002/May/ msg00382.html Again, this puts you on the hot path for potentially thousands of operations a second, to update a UI at a fraction of that rate. Unless you are trying to gather statistics that aren't otherwise available, not a good idea. Granted, if the info were otherwise available then adding anything to the hot-path would be wasteful. But if the only thing such an IOMedia filter did was accumulate the amount of data read and written as the commands flew by and then (at a much slower pace) provided those sums when requested by a userland UI component it shouldn't be overly expensive. The actual additional hot-path code is a couple of atomic adds. So as long as the layering infrastructure itself is not heavyweight then it should be acceptable. If adding just a NOP-layer is too expensive then there's a more fundamental problem. Also, to be fair, the rate that IO commands go by has nothing to do with the update rate in the UI. The hot-path would not trigger or invoke UI updates. It would only accumulate their sizes. This email sent to site_archiver(a)lists.apple.com

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Re: Determining disk activity per volume
by Arvind Dalvi 11 Oct '06

11 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=IpphB4B3j8VPeVjjL9qX9VODfKDXReS0tySW9J/VgHMsj7O0caSOJPskVAjEZTiFlRpRH2nr1JFalPgFukDSEak7U32fVDlCMD2uCtEyKqrgFPy1sbZ3CLKw7ajwAUnefcrjb/pE/aaLkuXoZpxJnt0wTytusrR6Fc4dzp8nyaw= _______________________________________________ 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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