June 2006 - Darwin-kernel - lists.apple.com

Mac OSX 10.4 NFS Version 4 client
by rick＠snowhite.cis.uoguelph.ca 30 Jun '06

30 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com First off, I apologize for sending this to several lists, but I didn't know which one(s) would be appropriate. If anyone is interested in trying an NFS Version 4 client (including Kerberos support) on xnu-792.6.70 (Mac OSX 10.4.6 on PPC or Darwin8.0.1 on x86), you can download the patch from (currently Beta test, I'd say): ftp.cis.uoguelph.ca:/pub/nfsv4/darwin-port/xnu-client.tar.gz There is also a "Readme" file and a primitive web page at: http://www.cis.uoguelph.ca/~nfsv4 If you are interested in seeing further announcements related to this, please join openbsd-nfsv4(a)sfobug.org. I'll try and refrain from spamming these lists with announcements most of you aren't interested in. Just in case you are interested in it, rick ps: If you have already downloaded the patch, you should do so again, since I just updated it a few minutes ago. _______________________________________________ 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: Kernel Panic : Mac OS X 10.4.7 Intel, KPI IP Filter & VPN
by Quinn 30 Jun '06

30 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com It isn't. 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 8:24 -0700 30/6/06, Josh Graessley wrote: asp_tcp is part of the AFP client. I don't know if the AFP Client is open source. This email sent to site_archiver(a)lists.apple.com

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Re: Kernel Panic : Mac OS X 10.4.7 Intel, KPI IP Filter & VPN
by Josh Graessley 30 Jun '06

30 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -josh On Jun 30, 2006, at 1:42 AM, Stephane Sudre wrote: Any chance the asp_tcp kext is part of Darwin source tree? On 29 juin 06, at 19:51, Josh Graessley wrote: -josh On Jun 29, 2006, at 8:34 AM, Stephane wrote: Problem ------- _______________________________________________ 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 asp_tcp is part of the AFP client. I don't know if the AFP Client is open source. I had a quick look at the 10.4.6 (PPC) source code page and I didn't see a name which could be related to this kext. It is possible that mbuf_pullup is modifying the chain and breaking some assumptions the asp_tcp kext is making. With a VPN connection, a KPI IP Filter is causing a Kernel Panic in com.apple.nke.asp_tcp on Mac OS X _Intel_. It's working fine on Mac OS X _PPC_ with or without a VPN connection. [blah blah blah]] _______________________________________________ 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/jgraessley% 40apple.com This email sent to jgraessley(a)apple.com smime.p7s

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Re: Kernel Panic : Mac OS X 10.4.7 Intel, KPI IP Filter & VPN
by Stephane Sudre 30 Jun '06

30 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Any chance the asp_tcp kext is part of Darwin source tree? On 29 juin 06, at 19:51, Josh Graessley wrote: -josh On Jun 29, 2006, at 8:34 AM, Stephane wrote: Problem ------- _______________________________________________ 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.… I had a quick look at the 10.4.6 (PPC) source code page and I didn't see a name which could be related to this kext. It is possible that mbuf_pullup is modifying the chain and breaking some assumptions the asp_tcp kext is making. With a VPN connection, a KPI IP Filter is causing a Kernel Panic in com.apple.nke.asp_tcp on Mac OS X _Intel_. It's working fine on Mac OS X _PPC_ with or without a VPN connection. [blah blah blah]] This email sent to site_archiver(a)lists.apple.com

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Re: Kernel Panic : Mac OS X 10.4.7 Intel, KPI IP Filter & VPN
by Josh Graessley 29 Jun '06

29 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -josh On Jun 29, 2006, at 8:34 AM, Stephane wrote: Problem ------- Basically the code is this one: tIPv4Header=(struct ip *) mbuf_data(*data); tIPHeaderLength=tIPv4Header->ip_hl*4; tProtocol=tIPv4Header->ip_p; switch(tProtocol) { case IPPROTO_TCP: { tLength=mbuf_len(*data); tRequiredLength=tIPHeaderLength+14; if (tLength < tRequiredLength) { if (mbuf_pullup(data, tRequiredLength)!=0) { return 13; } } break; } case IPPROTO_UDP: { tLength=mbuf_len(*data); tRequiredLength=tIPHeaderLength+4; if (tLength < tRequiredLength) { if (mbuf_pullup(data, tRequiredLength)!=0) { return 13; } } break; } } } return 0; } Question -------- Am I doing something completely dumb or is it a bug in OS X Intel? Additional Information ---------------------- _______________________________________________ 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 It is possible that mbuf_pullup is modifying the chain and breaking some assumptions the asp_tcp kext is making. With a VPN connection, a KPI IP Filter is causing a Kernel Panic in com.apple.nke.asp_tcp on Mac OS X _Intel_. It's working fine on Mac OS X _PPC_ with or without a VPN connection. I've been able to determine the lines of code leading to this Kernel Panic. errno_t MY_IPFilterV4_CallBack(void* cookie, mbuf_t *data, int offset, u_int8_t protocol) { if (data!=NULL) { struct ip * tIPv4Header; int tIPHeaderLength; u_char tProtocol; size_t tLength; size_t tRequiredLength; If I comment the whole switch case block, I don't see any Kernel Panic. The "funny" part is that it's not kernel panicing in this code but in com.apple.nke.asp_tcp. For the record, I'm using similar code with an Interface Filter and it's working fine in the same conditions. Thu Jun 29 16:29:08 2006 panic(cpu 0 caller 0x0019CADF): Unresolved kernel trap (CPU 0, Type 14=page fault), registers: CR0: 0x80010033, CR2: 0x00000008, CR3: 0x00d56000, CR4: 0x000006e0 EAX: 0x0000004c, EBX: 0x1d108000, ECX: 0x1cfa3500, EDX: 0x000005dc ESP: 0x00000008, EBP: 0x0b423be8, ESI: 0x00000000, EDI: 0x0000055c EFL: 0x00010216, EIP: 0x00351938, CS: 0x00000014, DS: 0x0000001c Backtrace, Format - Frame : Return Address (4 potential args on stack) 0xb423a48 : 0x128b5e (0x3bc46c 0xb423a6c 0x131bbc 0x0) 0xb423a88 : 0x19cadf (0x3c18e4 0x0 0xe 0x3c169c) 0xb423b38 : 0x197c7d (0xb423b4c 0xb423be8 0x351938 0x2c6b0048) 0xb423b44 : 0x351938 (0x2c6b0048 0xb42001c 0x1c 0x1c) 0xb423be8 : 0x227f26 (0x1cfa3500 0x5dc 0x5c8 0x1) 0xb423d28 : 0x22ed39 (0x1d109300 0x0 0x0 0x2161330) 0xb423e08 : 0x353e55 (0x23adb70 0x1f506e4 0x209e3e8 0x1002) 0xb423e48 : 0x363f5c (0x23ad948 0x1f506e4 0x0 0x32502f) 0xb423e88 : 0x1f5a7ed7 (0x23ad948 0x1f506e4 0x80 0x1f506e4) 0xb423ee8 : 0x353e55 (0x2305850 0x1f506e4 0x209e3e8 0x3595eb) 0xb423f28 : 0x359d67 (0x2305850 0x1f506e4 0x0 0x10) 0xb423f78 : 0x36de6c (0x209e3e8 0x227fcbc 0x227fd00 0x0) 0xb423fd8 : 0x197ff3 (0x2384d48 0x2384d48 0xb423b4c 0xb423abc) No mapping exists for frame pointer Backtrace terminated-invalid frame pointer 0xb009c968 Kernel loadable modules in backtrace (with dependencies): com.apple.nke.asp_tcp(4.4.3)@0x1f5a6000 Kernel version: Darwin Kernel Version 8.7.1: Wed Jun 7 16:19:56 PDT 2006; root:xnu-792.9.72.obj~2/RELEASE_I386 _______________________________________________ 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/jgraessley%40apple.com This email sent to jgraessley(a)apple.com smime.p7s

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Kernel Panic : Mac OS X 10.4.7 Intel, KPI IP Filter & VPN
by Stephane 29 Jun '06

29 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Problem ------- Basically the code is this one: tIPv4Header=(struct ip *) mbuf_data(*data); tIPHeaderLength=tIPv4Header->ip_hl*4; tProtocol=tIPv4Header->ip_p; switch(tProtocol) { case IPPROTO_TCP: { tLength=mbuf_len(*data); tRequiredLength=tIPHeaderLength+14; if (tLength < tRequiredLength) { if (mbuf_pullup(data, tRequiredLength)!=0) { return 13; } } break; } case IPPROTO_UDP: { tLength=mbuf_len(*data); tRequiredLength=tIPHeaderLength+4; if (tLength < tRequiredLength) { if (mbuf_pullup(data, tRequiredLength)!=0) { return 13; } } break; } } } return 0; } If I comment the whole switch case block, I don't see any Kernel Panic. Question -------- Am I doing something completely dumb or is it a bug in OS X Intel? Additional Information ---------------------- With a VPN connection, a KPI IP Filter is causing a Kernel Panic in com.apple.nke.asp_tcp on Mac OS X _Intel_. It's working fine on Mac OS X _PPC_ with or without a VPN connection. I've been able to determine the lines of code leading to this Kernel Panic. errno_t MY_IPFilterV4_CallBack(void* cookie, mbuf_t *data, int offset, u_int8_t protocol) { if (data!=NULL) { struct ip * tIPv4Header; int tIPHeaderLength; u_char tProtocol; size_t tLength; size_t tRequiredLength; The "funny" part is that it's not kernel panicing in this code but in com.apple.nke.asp_tcp. For the record, I'm using similar code with an Interface Filter and it's working fine in the same conditions. Thu Jun 29 16:29:08 2006 panic(cpu 0 caller 0x0019CADF): Unresolved kernel trap (CPU 0, Type 14=page fault), registers: CR0: 0x80010033, CR2: 0x00000008, CR3: 0x00d56000, CR4: 0x000006e0 EAX: 0x0000004c, EBX: 0x1d108000, ECX: 0x1cfa3500, EDX: 0x000005dc ESP: 0x00000008, EBP: 0x0b423be8, ESI: 0x00000000, EDI: 0x0000055c EFL: 0x00010216, EIP: 0x00351938, CS: 0x00000014, DS: 0x0000001c Backtrace, Format - Frame : Return Address (4 potential args on stack) 0xb423a48 : 0x128b5e (0x3bc46c 0xb423a6c 0x131bbc 0x0) 0xb423a88 : 0x19cadf (0x3c18e4 0x0 0xe 0x3c169c) 0xb423b38 : 0x197c7d (0xb423b4c 0xb423be8 0x351938 0x2c6b0048) 0xb423b44 : 0x351938 (0x2c6b0048 0xb42001c 0x1c 0x1c) 0xb423be8 : 0x227f26 (0x1cfa3500 0x5dc 0x5c8 0x1) 0xb423d28 : 0x22ed39 (0x1d109300 0x0 0x0 0x2161330) 0xb423e08 : 0x353e55 (0x23adb70 0x1f506e4 0x209e3e8 0x1002) 0xb423e48 : 0x363f5c (0x23ad948 0x1f506e4 0x0 0x32502f) 0xb423e88 : 0x1f5a7ed7 (0x23ad948 0x1f506e4 0x80 0x1f506e4) 0xb423ee8 : 0x353e55 (0x2305850 0x1f506e4 0x209e3e8 0x3595eb) 0xb423f28 : 0x359d67 (0x2305850 0x1f506e4 0x0 0x10) 0xb423f78 : 0x36de6c (0x209e3e8 0x227fcbc 0x227fd00 0x0) 0xb423fd8 : 0x197ff3 (0x2384d48 0x2384d48 0xb423b4c 0xb423abc) No mapping exists for frame pointer Backtrace terminated-invalid frame pointer 0xb009c968 Kernel loadable modules in backtrace (with dependencies): com.apple.nke.asp_tcp(4.4.3)@0x1f5a6000 Kernel version: Darwin Kernel Version 8.7.1: Wed Jun 7 16:19:56 PDT 2006; root:xnu-792.9.72.obj~2/RELEASE_I386 _______________________________________________ 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: open ("/dev/tty.xxxx"...) for my driver crashes the system
by Garth Cummings 28 Jun '06

28 Jun '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: kextunload problem
by Mark Stow 28 Jun '06

28 Jun '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com From: "Herb Petschauer" <bogvardi(a)gmail.com> To: "Mark Stow" <markstow(a)hotmail.com> CC: Darwin-kernel(a)lists.apple.com Subject: Re: kextunload problem Date: Wed, 28 Jun 2006 06:10:27 -0700 Hmm, you may need to post more details about your driver to the list. i'm sure you're right - it'll be something silly.. Can't unload com.MyTutorial.driver.HelloIOKit due to - com.MyTutorial.driver.HelloIOKit: com_MyTutorial_driver_HelloIOKit has 1 instance(s) I must be doing something wrong, but i really can't think what? _________________________________________________________________ Windows Live Messenger has arrived. Click here to download it for free! http://imagine-msn.com/messenger/launch80/?locale=en-gb _______________________________________________ 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.… i think you've hit the nail on the head - as it works on some machines but not others. In the fail case i see IOResources: match category ... exists thanks. hopefully that's the end now. On 28/06/06, Mark Stow <markstow(a)hotmail.com> wrote: ..but i've built the HelloIOKit project, and it exhibits the same symptoms - it loads and unloads fine, but if it's in /System/Library/Extensions/ (ie automatically loaded on boot) then it won't unload. >From: "Herb Petschauer" <bogvardi(a)gmail.com> >To: "Mark Stow" <markstow(a)hotmail.com> >CC: Darwin-kernel(a)lists.apple.com >Subject: Re: kextunload problem >Date: Tue, 27 Jun 2006 08:32:30 -0700 > >Hard to say, at this point it will be something silly though :-) > >It really depends on what it is you are actually implementing... > >Good luck! >-H. > >On 27/06/06, Mark Stow <markstow(a)hotmail.com> wrote: >> >>thanks again - sorry - I've not posted anything before! >>my free() calls super::free(). In an effort to find out why it's not >>unloading, all the life cycle functions just call super (and IOLog for >>some >>diags). >>any ideas why logging out and back in again would cure this kextunload >>fail >>issue? >> >> >> >From: "Herb Petschauer" <bogvardi(a)gmail.com> >> >To: "Mark Stow" <markstow(a)hotmail.com> >> >CC: Darwin-kernel(a)lists.apple.com >> >Subject: Re: kextunload problem >> >Date: Tue, 27 Jun 2006 07:37:40 -0700 >> > >> >Ok, top posting it is... :-) >> > >> >Look at the OSObject.cpp code, I think the retain count is set to "1" in >> >the >> >constructor, so I would expect the release() calls to go one beyond the >> >retain() calls. >> > >> >A simple solution, does your free() method call super::free()? That's >>my >> >mistake 9 times of out 10. >> > >> >See also this thread: < >> >http://lists.apple.com/archives/darwin-drivers/2006/May/msg00091.html> >> > >> >hth, >> >-H. >> > >> >On 27/06/06, Mark Stow <markstow(a)hotmail.com> wrote: >> >> >> >>Herb, thanks. I have some more info - >> >>The system log tells me there is one instance of my class which is why >>it >> >>can't unload. It doesn't make any difference if the firewire device is >> >>plugged in or not. >> >> >> >>I tried overriding retain() and release(), and in both cases when >> >>kextunload >> >>fails or succeeds, release() seems to be called once more than >>retain(). >> >> >> >>I also noticed that if I delete the driver from >>system/library/extensions >> >>and reboot, so it's not loaded on boot, and then copy it back and >>kextload >> >> >> >>it, kextunload will succeed. >> >> >> >>If someone is over-retaining (and it seems to need to happen on bootup) >> >>wouldn't I see a difference in the retain() release() counts when >>unload >> >>fails? >> >> >> >> >> >> >From: "Herb Petschauer" < bogvardi(a)gmail.com> >> >> >To: "Mark Stow" <markstow(a)hotmail.com> >> >> >CC: Darwin-kernel(a)lists.apple.com >> >> >Subject: Re: kextunload problem >> >> >Date: Mon, 26 Jun 2006 09:18:45 -0700 >> >> > >> >> >On 26/06/06, Mark Stow <markstow(a)hotmail.com > wrote: >> >> >> >> >> >>Hi - I'm having some difficulties with kextunload. >> >> >>I am working on a firewire device driver which derives from >>IOService. >> >> >>The >> >> >>problem seems to be that free() never gets called. However, if I >>log >> >>out, >> >> >>then log back in again, everything works fine - ie free() is called, >> >>and >> >> >>the >> >> >>driver unloads correctly. >> >> >>I have stripped the code down to a bare minimum of just the life >>cycle >> >> >>functions, which in turn just call into IOService. I see init(), >> >>attach() >> >> >>and start() being called, and then on unload stop() detach() but not >> >> >>free(). >> >> >> Any help/ideas would be appreciated! >> >> >> >> >> >> >> >> >> >> >> > >> >> >Check your system.log, there's probably a message telling you why >>your >> >>kext >> >> >won't unload (e.g. Couldn't unload kext (name) because there are x >> >> >instances >> >> >of <some class>). free() doesn't get called until the last release() >> >> >(retain/release must balance) so I suspect someone is >> >>over-retaining(). Is >> >> >your Firewire drive unplugged when you try and unload the kext? The >> >> >/dev/disk nodes are usually left created until you unplug the >> >>device. Just >> >> >a thought... >> >> > >> >> >-H. >> >> >> >>_________________________________________________________________ >> >>Windows Live Messenger has arrived. Click here to download it for >>free! >> >>http://imagine-msn.com/messenger/launch80/?locale=en-gb >> >> >> >> >> >>_________________________________________________________________ >>The new MSN Search Toolbar now includes Desktop search! >>http://join.msn.com/toolbar/overview >> >> _________________________________________________________________ Be the first to hear what's new at MSN - sign up to our free newsletters! http://www.msn.co.uk/newsletters This email sent to site_archiver(a)lists.apple.com

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Re: kextunload problem
by Herb Petschauer 28 Jun '06

28 Jun '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:content-transfer-encoding:content-disposition:references; b=EZKutJHm7hosqeF5DbkqDt31REnyty/RotPU8XrQqFBiklBzQ9cVvufPTv6IV60vLX6gSCSpXDpfT+t6yUtVo41Xtp1ouQw98l2RU9bbDSgn/KlFk543qiakgPhG9IpmUhGFBfMpWoBmx3XEmowkXQY0ITf/ob7OSMFEgqbmV9A= Hmm, you may need to post more details about your driver to the list. i'm sure you're right - it'll be something silly.. ..but i've built the HelloIOKit project, and it exhibits the same symptoms - it loads and unloads fine, but if it's in /System/Library/Extensions/ (ie automatically loaded on boot) then it won't unload. Can't unload com.MyTutorial.driver.HelloIOKit due to - com.MyTutorial.driver.HelloIOKit: com_MyTutorial_driver_HelloIOKit has 1 instance(s) I must be doing something wrong, but i really can't think what? >From: "Herb Petschauer" <bogvardi(a)gmail.com> >To: "Mark Stow" <markstow(a)hotmail.com> >CC: Darwin-kernel(a)lists.apple.com >Subject: Re: kextunload problem >Date: Tue, 27 Jun 2006 08:32:30 -0700 > >Hard to say, at this point it will be something silly though :-) > >It really depends on what it is you are actually implementing... > >Good luck! >-H. > >On 27/06/06, Mark Stow <markstow(a)hotmail.com> wrote: >> >>thanks again - sorry - I've not posted anything before! >>my free() calls super::free(). In an effort to find out why it's not >>unloading, all the life cycle functions just call super (and IOLog for >>some >>diags). >>any ideas why logging out and back in again would cure this kextunload >>fail >>issue? >> >> >> >From: "Herb Petschauer" <bogvardi(a)gmail.com> >> >To: "Mark Stow" <markstow(a)hotmail.com> >> >CC: Darwin-kernel(a)lists.apple.com >> >Subject: Re: kextunload problem >> >Date: Tue, 27 Jun 2006 07:37:40 -0700 >> > >> >Ok, top posting it is... :-) >> > >> >Look at the OSObject.cpp code, I think the retain count is set to "1" in >> >the >> >constructor, so I would expect the release() calls to go one beyond the >> >retain() calls. >> > >> >A simple solution, does your free() method call super::free()? That's >>my >> >mistake 9 times of out 10. >> > >> >See also this thread: < >> >http://lists.apple.com/archives/darwin-drivers/2006/May/msg00091.html> >> > >> >hth, >> >-H. >> > >> >On 27/06/06, Mark Stow <markstow(a)hotmail.com> wrote: >> >> >> >>Herb, thanks. I have some more info - >> >>The system log tells me there is one instance of my class which is why >>it >> >>can't unload. It doesn't make any difference if the firewire device is >> >>plugged in or not. >> >> >> >>I tried overriding retain() and release(), and in both cases when >> >>kextunload >> >>fails or succeeds, release() seems to be called once more than >>retain(). >> >> >> >>I also noticed that if I delete the driver from >>system/library/extensions >> >>and reboot, so it's not loaded on boot, and then copy it back and >>kextload >> >> >> >>it, kextunload will succeed. >> >> >> >>If someone is over-retaining (and it seems to need to happen on bootup) >> >>wouldn't I see a difference in the retain() release() counts when >>unload >> >>fails? >> >> >> >> >> >> >From: "Herb Petschauer" < bogvardi(a)gmail.com> >> >> >To: "Mark Stow" <markstow(a)hotmail.com> >> >> >CC: Darwin-kernel(a)lists.apple.com >> >> >Subject: Re: kextunload problem >> >> >Date: Mon, 26 Jun 2006 09:18:45 -0700 >> >> > >> >> >On 26/06/06, Mark Stow <markstow(a)hotmail.com > wrote: >> >> >> >> >> >>Hi - I'm having some difficulties with kextunload. >> >> >>I am working on a firewire device driver which derives from >>IOService. >> >> >>The >> >> >>problem seems to be that free() never gets called. However, if I >>log >> >>out, >> >> >>then log back in again, everything works fine - ie free() is called, >> >>and >> >> >>the >> >> >>driver unloads correctly. >> >> >>I have stripped the code down to a bare minimum of just the life >>cycle >> >> >>functions, which in turn just call into IOService. I see init(), >> >>attach() >> >> >>and start() being called, and then on unload stop() detach() but not >> >> >>free(). >> >> >> Any help/ideas would be appreciated! >> >> >> >> >> >> >> >> >> >> >> > >> >> >Check your system.log, there's probably a message telling you why >>your >> >>kext >> >> >won't unload (e.g. Couldn't unload kext (name) because there are x >> >> >instances >> >> >of <some class>). free() doesn't get called until the last release() >> >> >(retain/release must balance) so I suspect someone is >> >>over-retaining(). Is >> >> >your Firewire drive unplugged when you try and unload the kext? The >> >> >/dev/disk nodes are usually left created until you unplug the >> >>device. Just >> >> >a thought... >> >> > >> >> >-H. >> >> >> >>_________________________________________________________________ >> >>Windows Live™ Messenger has arrived. Click here to download it for >>free! >> >>http://imagine-msn.com/messenger/launch80/?locale=en-gb >> >> >> >> >> >>_________________________________________________________________ >>The new MSN Search Toolbar now includes Desktop search! >>http://join.msn.com/toolbar/overview >> >> _________________________________________________________________ Windows Live™ Messenger has arrived. Click here to download it for free! http://imagine-msn.com/messenger/launch80/?locale=en-gb _______________________________________________ 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.… On 28/06/06, Mark Stow <markstow(a)hotmail.com> wrote: This email sent to site_archiver(a)lists.apple.com

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Re: kextunload problem
by Mark Stow 28 Jun '06

28 Jun '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com i'm sure you're right - it'll be something silly.. I must be doing something wrong, but i really can't think what? From: "Herb Petschauer" <bogvardi(a)gmail.com> To: "Mark Stow" <markstow(a)hotmail.com> CC: Darwin-kernel(a)lists.apple.com Subject: Re: kextunload problem Date: Tue, 27 Jun 2006 08:32:30 -0700 Hard to say, at this point it will be something silly though :-) It really depends on what it is you are actually implementing... Good luck! -H. thanks again - sorry - I've not posted anything before! my free() calls super::free(). In an effort to find out why it's not unloading, all the life cycle functions just call super (and IOLog for some diags). any ideas why logging out and back in again would cure this kextunload fail issue? _________________________________________________________________ The new MSN Search Toolbar now includes Desktop search! http://join.msn.com/toolbar/overview _______________________________________________ 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.… ..but i've built the HelloIOKit project, and it exhibits the same symptoms - it loads and unloads fine, but if it's in /System/Library/Extensions/ (ie automatically loaded on boot) then it won't unload. Can't unload com.MyTutorial.driver.HelloIOKit due to - com.MyTutorial.driver.HelloIOKit: com_MyTutorial_driver_HelloIOKit has 1 instance(s) On 27/06/06, Mark Stow <markstow(a)hotmail.com> wrote: >From: "Herb Petschauer" <bogvardi(a)gmail.com> >To: "Mark Stow" <markstow(a)hotmail.com> >CC: Darwin-kernel(a)lists.apple.com >Subject: Re: kextunload problem >Date: Tue, 27 Jun 2006 07:37:40 -0700 > >Ok, top posting it is... :-) > >Look at the OSObject.cpp code, I think the retain count is set to "1" in >the >constructor, so I would expect the release() calls to go one beyond the >retain() calls. > >A simple solution, does your free() method call super::free()? That's my >mistake 9 times of out 10. > >See also this thread: < >http://lists.apple.com/archives/darwin-drivers/2006/May/msg00091.html> > >hth, >-H. > >On 27/06/06, Mark Stow <markstow(a)hotmail.com> wrote: >> >>Herb, thanks. I have some more info - >>The system log tells me there is one instance of my class which is why it >>can't unload. It doesn't make any difference if the firewire device is >>plugged in or not. >> >>I tried overriding retain() and release(), and in both cases when >>kextunload >>fails or succeeds, release() seems to be called once more than retain(). >> >>I also noticed that if I delete the driver from system/library/extensions >>and reboot, so it's not loaded on boot, and then copy it back and kextload >> >>it, kextunload will succeed. >> >>If someone is over-retaining (and it seems to need to happen on bootup) >>wouldn't I see a difference in the retain() release() counts when unload >>fails? >> >> >> >From: "Herb Petschauer" < bogvardi(a)gmail.com> >> >To: "Mark Stow" <markstow(a)hotmail.com> >> >CC: Darwin-kernel(a)lists.apple.com >> >Subject: Re: kextunload problem >> >Date: Mon, 26 Jun 2006 09:18:45 -0700 >> > >> >On 26/06/06, Mark Stow <markstow(a)hotmail.com > wrote: >> >> >> >>Hi - I'm having some difficulties with kextunload. >> >>I am working on a firewire device driver which derives from IOService. >> >>The >> >>problem seems to be that free() never gets called. However, if I log >>out, >> >>then log back in again, everything works fine - ie free() is called, >>and >> >>the >> >>driver unloads correctly. >> >>I have stripped the code down to a bare minimum of just the life cycle >> >>functions, which in turn just call into IOService. I see init(), >>attach() >> >>and start() being called, and then on unload stop() detach() but not >> >>free(). >> >> Any help/ideas would be appreciated! >> >> >> >> >> >> >> > >> >Check your system.log, there's probably a message telling you why your >>kext >> >won't unload (e.g. Couldn't unload kext (name) because there are x >> >instances >> >of <some class>). free() doesn't get called until the last release() >> >(retain/release must balance) so I suspect someone is >>over-retaining(). Is >> >your Firewire drive unplugged when you try and unload the kext? The >> >/dev/disk nodes are usually left created until you unplug the >>device. Just >> >a thought... >> > >> >-H. >> >>_________________________________________________________________ >>Windows Live Messenger has arrived. Click here to download it for free! >>http://imagine-msn.com/messenger/launch80/?locale=en-gb >> >> _________________________________________________________________ Windows Live Messenger has arrived. Click here to download it for free! http://imagine-msn.com/messenger/launch80/?locale=en-gb This email sent to site_archiver(a)lists.apple.com

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