July 2007 - Darwin-dev - lists.apple.com

Re: Problem in sending data between User Space & Kernel Space
by Arvind Dalvi 24 Jul '07

24 Jul '07

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Using VFS operations for a given node
by Standard Azi 24 Jul '07

24 Jul '07

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Dkim-signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=R6hMpq9VHIIuduZPhTq1eBIXEBb04jW8D+bKhKRfO/0jE4Pj9U/LOxy3UIbd9mjV9oqMr5/arfhg5+oBgcFRXH+xXb91TrGIKChSQdvxF3nBNIncRy5aQLYGkPRTYP45eEcYfQZBGJ0UZc93JZeD0kL2NrgsNqdgEiyqOmQ/LPg= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=eAKSJWP8/idT1SlpDu2LhpmTZ74ABObE/XGMEgAsc1OMVrADKycVzFwWn3TLE3bmAaC8vhW369NK3qOVtUZujXI2pmqZ1h/qxaSzQ9zCMCh6IPRUUfH7VpE1B4dUfkRK5kuYO14oLb0eRc9WUm877Oc1weWDyGndlNB3zEMGzPc= Hello! I've noticed, that operations related to a given filesystem are handled via an array of function pointers named `v_op'. I am now wondering, what's the best way to reference this array. I'd like to use the `getxattr()' function within a kernel extension. As I'm unable to use v_op, I've tried to find a "general" function for `getxattr()'. After a bit of exploration, I've found : `vn_getxattr()' which seems the right thing to use. This is how I've tried to use it : ==== #include <mach/mach_types.h> #include <libkern/libkern.h> #include <libkern/OSAtomic.h> #include <libkern/OSMalloc.h> #include <sys/sysctl.h> #include <sys/kauth.h> #include <sys/vnode.h> #include <sys/xattr.h> /* .... */ char val[VAL_SIZE]; if ( vn_getxattr( (vnode_t)vn, KEY_NAME, val, VAL_SIZE, 0, NULL) == -1) { /* .... */ ==== The build succeeds, but trying to load the module fails due to linking errors : === kld(): Undefined symbols: _vn_getxattr kextload: kld_load_from_memory() failed for module /Users/marco/vnode_example/build/Release/vnode_example.kext/Contents/MacOS/vnode_example === I'm now wondering what have I missed. What would be the best way to access VFS operations given a valid vnode? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Problem in sending data between User Space & Kernel Space
by JanakiRam 24 Jul '07

24 Jul '07

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Dkim-signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=TXgKnqWq/aVz7bUy6NLPc+xOtvaX/7Fk/ysZ7mw9nRrN7BWuzo+chA1wsJT4a1tpGinG/TsRQJuJsLjz8+s9Z+GL6Nd/A2t0T1FOkHUx5Evz6WNyQzhbG1I1M8Dk2+5X1f8abOkC5esyJnMJ+AOfXTFxmbSnxAAcFWnjhv9BSmA= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=AnOkhMsEuIwY66UXcmseO6ZeKHhZZx+4tsEmknULVU2KzJmfKzJCGyH246A+OwNKGPMcDT0KQkV+p08EJp/NHTwFWefiVBm3lAL++0EoHgup73HyEpjjWPoDkpefU8H6ijav3EyzEmToZwxQ5JzrCH9tyjLDEBnsYHoQL4v1OVY= _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: current_thread() -> Undefined symbols NKE
by Terry Lambert 24 Jul '07

24 Jul '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com This link explains symbol dependencies in KEXTs: You want "com.apple.kernel.mach". -- Terry Terry, >Mach.exports:_current_thread Where do I add this setting? Erez On Jul 24, 2007, at 1:37 AM, Terry Lambert wrote: Mach.exports:_current_thread You need to declare a dependency on Mach. -- Terry Hi, I am working with NKE. I am in need of using current_thread() #include <kern/thread.h> thread_t mt_t = current_thread(); Compiling and linking of kext are OK, but loading fails as follows: (I tried from .c and .cpp to make sure it's not an extern "C" ) Please advise. Cheers, Erez _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/tlambert%40apple.com //====================== Erez Kaplan Senior software engineer OSX erezk(a)speedbit.com //====================== _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… <http://developer.apple.com/documentation/Darwin/Conceptual/KEXTConcept/KEXT… > On Jul 23, 2007, at 11:09 PM, Erez Kaplan wrote: On Jul 23, 2007, at 3:25 AM, Erez Kaplan wrote: + kextload /tmp/tcplognke.kext kld(): Undefined symbols: _current_thread kextload: kld_load_from_memory() failed for module /tmp/ tcplognke.kext/Contents/MacOS/tcplognke kextload: a link/load error occured for kernel extension /tmp/ tcplognke.kext load failed for extension /tmp/tcplognke.kext This email sent to tlambert(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: current_thread() -> Undefined symbols NKE
by Erez Kaplan 24 Jul '07

24 Jul '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Problem in sending data between User Space & Kernel Space
by JanakiRam 24 Jul '07

24 Jul '07

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Dkim-signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type; b=qxzFWnBO+i23yumw/3cd9HhSVi2aFyNNUrPe07gerzkTSezW5N7eqPE8G+WFo38UQ0TQ3m4yY5b4nam1MsZbDjZOpN6TYrM6Pka/91/Qpxb2aBKOdS3m5Eli0WHfaFMQAOS5l3rIXashuAaKrKt/f/CddlLRiFv5h5DxGxIOseo= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type; b=XXjL+PgiEcJLmRa3UspHOpj5v8vdzOjr4gc4ULy/1k7vJy3ZTlXh1jKZvIxAq3ImNl67QmuVX26JYJn00jbUSXIkcdVKZdniTDgtwXyNcsMfbdjJu2iH0R6ZmXJ62vUFyjxOpwhT4wT5HzH/4MHvmOSay//xJ7pT8r6iJwmSkkM= _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: current_thread() -> Undefined symbols NKE
by Terry Lambert 23 Jul '07

23 Jul '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Mach.exports:_current_thread You need to declare a dependency on Mach. -- Terry Hi, I am working with NKE. I am in need of using current_thread() #include <kern/thread.h> thread_t mt_t = current_thread(); Compiling and linking of kext are OK, but loading fails as follows: (I tried from .c and .cpp to make sure it's not an extern "C" ) Please advise. Cheers, Erez _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/tlambert%40apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… On Jul 23, 2007, at 3:25 AM, Erez Kaplan wrote: + kextload /tmp/tcplognke.kext kld(): Undefined symbols: _current_thread kextload: kld_load_from_memory() failed for module /tmp/ tcplognke.kext/Contents/MacOS/tcplognke kextload: a link/load error occured for kernel extension /tmp/ tcplognke.kext load failed for extension /tmp/tcplognke.kext This email sent to tlambert(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: How do I "Create Archive" through Bash?
by Fritz Anderson 23 Jul '07

23 Jul '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com man zip and look at the -y switch. — F On 23 Jul 2007, at 2:20 AM, Paul Tapper wrote: The command-line I'm using for zip is: zip -r -q -9 MyArchive.zip ./MPKGs _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This is an odd list to send this to; I'd have thought installer-dev would be better. Installer package files include a symbolic link to the pax archive. Normally, zip follows symbolic links, compressing fresh copies of the targets. I'm trying to use a bash script to automate the compression of a couple of Meta-packages. Each .mpkg is about 1.1Mb in size, and when I select them both in Finder, right-click and select "Create Archive of Files" it makes an Archive.zip which contains them both and is 1.6Mb in size. I want to try to recreate this action via bash, and have tried using the "zip" command, but I end up with zip files which are a lot bigger. Even using "-9" as a parameter to zip, to try to force maximum compression, I still end up with a zip file which is approx 3.2Mb (bigger than the sum of the two .mpkg sizes!). This email sent to site_archiver(a)lists.apple.com

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current_thread() -> Undefined symbols NKE
by Erez Kaplan 23 Jul '07

23 Jul '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, I am working with NKE. I am in need of using current_thread() #include <kern/thread.h> thread_t mt_t = current_thread(); Compiling and linking of kext are OK, but loading fails as follows: (I tried from .c and .cpp to make sure it's not an extern "C" ) Please advise. Cheers, Erez _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… + kextload /tmp/tcplognke.kext kld(): Undefined symbols: _current_thread kextload: kld_load_from_memory() failed for module /tmp/ tcplognke.kext/Contents/MacOS/tcplognke kextload: a link/load error occured for kernel extension /tmp/ tcplognke.kext load failed for extension /tmp/tcplognke.kext This email sent to site_archiver(a)lists.apple.com

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How do I "Create Archive" through Bash?
by Paul Tapper 23 Jul '07

23 Jul '07

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, The command-line I'm using for zip is: zip -r -q -9 MyArchive.zip ./MPKGs Thanks for any help. Paul _________________________________________________________________ Win tickets to the sold out Live Earth concert! http://liveearth.uk.msn.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I'm trying to use a bash script to automate the compression of a couple of Meta-packages. Each .mpkg is about 1.1Mb in size, and when I select them both in Finder, right-click and select "Create Archive of Files" it makes an Archive.zip which contains them both and is 1.6Mb in size. I want to try to recreate this action via bash, and have tried using the "zip" command, but I end up with zip files which are a lot bigger. Even using "-9" as a parameter to zip, to try to force maximum compression, I still end up with a zip file which is approx 3.2Mb (bigger than the sum of the two .mpkg sizes!). Please can anyone tell me how to get a better compression from bash (or am I just using zip wrong?) This email sent to site_archiver(a)lists.apple.com

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