December 2002 - Darwin-kernel

Re: Interpretation of Kernel panic logs?
by William Kucharski 04 Dec '02

04 Dec '02

Robert, The wide variety of panics you're seeing (some instruction miss, some data) make me believe there is memory corruption of some type going on, which makes me suspect the RAM in your TiBook may be acting up (or is overheating.) Specifically the last trap you received - the Unexpected user state trap of 0x401 - should never occur. A reinstall of 10.2.2 couldn't hurt but you may want to run your Hardware Test CD first just to see if it has any RAM complaints... William Kucharski kucharsk(a)mac.com _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: testing for open files or volumes
by Justin C. Walker 04 Dec '02

04 Dec '02

On Tuesday, December 3, 2002, at 10:21 PM, Alex Reynolds wrote: On Tuesday, December 3, 2002, at 10:55 PM, Umesh Vaishampayan wrote: On Monday, December 2, 2002, at 10:36 PM, Alex Reynolds wrote: I was wondering if there are ways to test whether a file is open by another process under Darwin (and by extension Mac OS X)? Even if these was such an API, wow do you guarantee that the answer isn't stale by the time you get around to act on it? I'm a little confused by the meaning of stale -- if a removable volume can't be ejected when a file is open, wouldn't there have to be some mechanism at the kernel or a higher level that prevents this event? Not necessarily. I think that a usage count on each mount point inode does the job (see the 'umount' code for any of the file systems supported, in the xnu tree). The API you ask about is (although it doesn't exist) a very inefficient way to determine whether the volume is busy. Once the file is closed, the volume must maintain some fresh information about this because the disk can then be unmounted pretty soon thereafter. The unmounting operation causes all cached disk blocks to be flushed; the "final" information regarding recently-closed files would wander out to disk sometime between the close and the final flush. I guess I'm looking for state information that would tell me whether a volume has an open file, or allow me to try to lock all files one by one (and have a lock attempt rejected if a file is locked elsewhere, indicating a busy volume). To me, the end result would be equivalent. Why would you want to lock all files on a volume? What are you trying to do? The above doesn't enlighten me. Note that it's the kernel that determines whether a file system is busy when a request to unmount comes along. No user-mode code is involved. There are a couple of command-line commands (fstat and lsof) that provide information about open files per process; you could look at that source to determine the ugliness of getting that information at user level (and as Umesh notes, the information is likely to be stale, depending on the activity on your system). I suppose I'm looking for something similar to how NFS manages to handle this issue, but none of the POSIX locking functions I've tried seem to hand back useful errors under OS X. I don't think that NFS worries about this; that's one of the joys of being stateless. The client-side handles this in the same way that it does for local volumes. The server-side doesn't care. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | If you're not confused, | You're not paying attention *--------------------------------------*-------------------------------* _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: testing for open files or volumes
by Alex Reynolds 04 Dec '02

04 Dec '02

On Tuesday, December 3, 2002, at 10:55 PM, Umesh Vaishampayan wrote: On Monday, December 2, 2002, at 10:36 PM, Alex Reynolds wrote: I was wondering if there are ways to test whether a file is open by another process under Darwin (and by extension Mac OS X)? Even if these was such an API, wow do you guarantee that the answer isn't stale by the time you get around to act on it? I'm a little confused by the meaning of stale -- if a removable volume can't be ejected when a file is open, wouldn't there have to be some mechanism at the kernel or a higher level that prevents this event? Once the file is closed, the volume must maintain some fresh information about this because the disk can then be unmounted pretty soon thereafter. I guess I'm looking for state information that would tell me whether a volume has an open file, or allow me to try to lock all files one by one (and have a lock attempt rejected if a file is locked elsewhere, indicating a busy volume). To me, the end result would be equivalent. I suppose I'm looking for something similar to how NFS manages to handle this issue, but none of the POSIX locking functions I've tried seem to hand back useful errors under OS X. -Alex _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: testing for open files or volumes
by Umesh Vaishampayan 04 Dec '02

04 Dec '02

On Monday, December 2, 2002, at 10:36 PM, Alex Reynolds wrote: I was wondering if there are ways to test whether a file is open by another process under Darwin (and by extension Mac OS X)? Even if these was such an API, wow do you guarantee that the answer isn't stale by the time you get around to act on it? --Umesh -- Umesh Vaishampayan Mac OS X - Kernel _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: harddisk suspend/sleep management
by Ethan Bold 03 Dec '02

03 Dec '02

Hi Matthias - Nothing like noflushd is implemented in darwin/os x. It's certainly an "interesting" idea. I know far too little about linux power management, so I'm not sure how easily this concept would convert. Note than, in OS X, disk spindown requests originate and execute within the kernel. There's not as much user-space interaction as I perceive linux has. If you want to get started, checkout these opensource projects from cvs and start grepping. These are pointers to driver-level power management code. If you want to add hooks into the filesystem to prevent spin-up, check xnu/bsd/vfs(?). Disk specific power management: IOATABlockStorage IOSCSIArchitectureModelFamily General kernel power management code (which all device drivers inherit): xnu Files: xnu/iokit/Kernel/IOServicePM.cpp see IOService::setIdleTimerPeriod() and IOService::start_PM_idle_timer() I started this email with the intention of going into moderate detail about how this works, but I'm too tired. If you're seriously interested in implementing noflushd, get looking at the code and write back with specific questions. I'm happy to help. So GET HACKING :) -ethan On Sunday, December 1, 2002, at 09:29 am, Matthias Kretschmer wrote: Hello! I was thinking about the noflushd project (http://noflushd.sourceforge.net/) and thought, this should be possible for darwin, too. The logic for suppressing write access to the hdd should be easy if proper asynchron write is implemented. I wouldn't say to port noflushd, but implement some other simple tool which handles this (of course if it is less work to port :) ). So but this needs fundamental support from the kernel. I don't really know where to begin to look at. Or is something like this already implemented? -- Greetings Matthias Kretschmer _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: IPSec command line tool on Jaguar?
by Laurent Dumont 03 Dec '02

03 Dec '02

Raphael, There is no command line tools per say for IPsec on Jaguar, but you can check the IKE (man racoon) and also setkey (man setkey) and for programatic ways to set IPsec policy, "man ipsec_set_policy" You can also check the freebsd ipsec mini "howto" as MacOS X is using the same implementation for IPsec: http://www.daemonnews.org/200101/ipsec-howto.html Someone also recently release a GUI for configuring IPsec, you may want to give it a try: http://www.afp548.com/software/VaporSec/ --Laurent on 12/03/02 03:18, Raphael Arlitt at raphael.arlitt(a)mmweg.rwth-aachen.de wrote: > Dear developer community, > > I need the ipsec command on Jaguar (for a WLAN in a student housing > community). It seems it is there already for Jaguar, > but not on mine :-) I found the following websites and informations. > Can anybody tell me how to find the command line tool for IPSec? > > Do I really need to be select ADC member? I am currently a simple student > ADC > member. Can anybody who is an Select member give me one of their 5 seed > keys? > That is acutally the procedure promoted by apple - kind of strange to me. > > At > http://developer.apple.com/internet/macosx/securityintro.html > Apple says: > > VPNs > Mac OS X 10.2 includes support for two types of Virtual Private Networks > (VPNs), PPTP and IPsec. Using PPTP as a client is fairly easy, the > "Internet > Connect" application has an easy GUI for accessing PPTP servers. IPsec > support is also built into Mac OS X 10.2, but there isn't a built-in GUI > for > it. Again, either the command line tools or a third-party GUI tool can be > helpful. > > and on > > they mention: > > [9] Where to Find Mac OS X DP4 Information > For late breaking news about Mac OS X Developer Preview Release 4 (DP4), > visit > Apple's Mac OS X web site. > > The pre-release versions of IPv6 and IPsec technologies for Mac OS X are > available for download via the ADC Software Seeding Site. They require DP4, > and contain a new Kernel, Headers, Libraries and Tools for using IPv6 and > IPsec on Mac OS X. (IPv6 is a proposed standard for next-generation IP > implementations. IPsec is a proposed standard for conducting secure IP > traffic over the Internet.) > _______________________________________________ > darwin-kernel mailing list | darwin-kernel(a)lists.apple.com > Help/Unsubscribe/Archives: > http://www.lists.apple.com/mailman/listinfo/darwin-kernel > Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Kernel Extensions
by Eric Long 03 Dec '02

03 Dec '02

Justin, thanks for your reply. > The rules of engagement for C++ in the kernel are somewhat akin to the > limitations for Embedded C++. Ok. I'm not really familiar with Embedded C++, but I took a spin on Google and found enough to get the picture. > All compilation for kernel extensions, > whether IOKit gizmos or "just C", must be compiled for static linking. > I can't say whether this requires static declarations of methods, but > you should be able to verify whether that is the norm by checking a few > IOKit projects in the Darwin repository. I'll take a look around. I have seen only C source examples. Maybe I can find a kernel extension using C++. Stiphane Sudre wrote: > memcmp is in the kernel AFAIK. It's implemented via the IOKit. Ah, I see it in IOKit/system.h. Thanks for the tip. Eric Long ___________________________________________________________________________ Macintosh Software Engineer Aladdin Systems, Inc. http://www.aladdinsys.com 245 Westridge Drive, Watsonville, CA 95076 (831) 761-6200 x628 _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Missing twalk(), tfind(), tsearch() and tdelete() functions
by John E. Robinson III 03 Dec '02

03 Dec '02

Hi, In my porting of some software from Solaris to 10.2, I found that the twalk(), tfind(), tsearch() and tdelete() functions were missing. I can't seem to find these functions and their header search.h is not in /usr/include. However, these functions have been part of FreeBSD for quite a while and they are listed in the 10.2 man pages. At this point, I simply downloaded the necessary source and header files from FreeBSD to make my own library. However, any insight into where these functions might be, why they might be missing or when they might be included in OS X would be appreciated. Incidentally, I ran into similar problems for hcreate(), hdestroy() and hsearch() functions. Thanks John Robinson NASA Ames Research Center _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Interpretation of Kernel panic logs?
by Robert Nicholson 03 Dec '02

03 Dec '02

In the last two days I've had about 10 panics... please note Nov 5 in the Panic log is actually Dec 3... my clock was playing up and it reset itself .. perhaps related to the panics I don't know. My machine is a Titanium 800 DVI running 10.2.2 Here's the logs of the panics I've seen in the last two days. I may resort to a clean 10.2.2 install tomorrow. Curiously enough I haven't heard my fan in days and I'm in Thailand although I am using a Podium Coolpad Traveller at the moment. Mon Dec 2 20:35:02 2002 Unresolved kernel trap(cpu 0): 0x400 - Inst access DAR=0x0134a000 PC=0x000001f4 Latest crash info for cpu 0: Exception state (sv=0x14FEC500) PC=0x000001F4; MSR=0x40009030; DAR=0x0134A000; DSISR=0x40000000; LR=0x000001F5; R1=0x0DAB3E50; XCP=0x00000010 (0x400 - Inst access) Backtrace: 0x0002414C 0x00024FE0 0x00092098 0x61C21B34 Proceeding back via exception chain: Exception state (sv=0x14FEC500) previously dumped as "Latest" state. skipping... Exception state (sv=0x150BD280) PC=0x90074168; MSR=0x0200F030; DAR=0x0134A000; DSISR=0x40000000; LR=0x900064B0; R1=0xBFFEEF60; XCP=0x00000030 (0xC00 - System call) Kernel version: Darwin Kernel Version 6.2: Tue Nov 5 22:00:03 PST 2002; root:xnu/xnu-344.12.2.obj~1/RELEASE_PPC panic(cpu 0): 0x400 - Inst access Latest stack backtrace for cpu 0: Backtrace: 0x00084E9C 0x000852CC 0x00027F8C 0x0008ECA8 0x00091D18 Proceeding back via exception chain: Exception state (sv=0x14FEC500) PC=0x000001F4; MSR=0x40009030; DAR=0x0134A000; DSISR=0x40000000; LR=0x000001F5; R1=0x0DAB3E50; XCP=0x00000010 (0x400 - Inst access) Backtrace: 0x0002414C 0x00024FE0 0x00092098 0x61C21B34 Exception state (sv=0x150BD280) PC=0x90074168; MSR=0x0200F030; DAR=0x0134A000; DSISR=0x40000000; LR=0x900064B0; R1=0xBFFEEF60; XCP=0x00000030 (0xC00 - System call) Kernel version: Darwin Kernel Version 6.2: Tue Nov 5 22:00:03 PST 2002; root:xnu/xnu-344.12.2.obj~1/RELEASE_PPC ********* Mon Dec 2 21:46:42 2002 Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x032513b4 PC=0x0020e42c Latest crash info for cpu 0: Exception state (sv=0x14FB0000) PC=0x0020E42C; MSR=0x00001030; DAR=0x032513B4; DSISR=0x40000000; LR=0x0020E424; R1=0x0DA5BB40; XCP=0x0000000C (0x300 - Data access) Backtrace: 0x0022DF58 0x001E93B4 0x0008F814 0x00033AD8 0x00033CB4 0x00026814 0x0008EA7C 0x00091D18 Proceeding back via exception chain: Exception state (sv=0x14FB0000) previously dumped as "Latest" state. skipping... Exception state (sv=0x14E10C80) PC=0x00094728; MSR=0x00009030; DAR=0xF002FEF4; DSISR=0x42000000; LR=0x0008ECB4; R1=0x0DA5BEF0; XCP=0x0000008C (Preemption) Backtrace: 0x0008F0A8 0x00091D18 Exception state (sv=0x14EF7280) PC=0x91A5C1C0; MSR=0x0200F030; DAR=0xF002FEF4; DSISR=0x42000000; LR=0x91A5C194; R1=0xBFFFD350; XCP=0x00000400 (Unknown code) Kernel version: Darwin Kernel Version 6.2: Tue Nov 5 22:00:03 PST 2002; root:xnu/xnu-344.12.2.obj~1/RELEASE_PPC panic(cpu 0): 0x300 - Data access Latest stack backtrace for cpu 0: Backtrace: 0x00084E9C 0x000852CC 0x00027F8C 0x0008ECA8 0x00091D18 Proceeding back via exception chain: Exception state (sv=0x14FB0000) PC=0x0020E42C; MSR=0x00001030; DAR=0x032513B4; DSISR=0x40000000; LR=0x0020E424; R1=0x0DA5BB40; XCP=0x0000000C (0x300 - Data access) Backtrace: 0x0022DF58 0x001E93B4 0x0008F814 0x00033AD8 0x00033CB4 0x00026814 0x0008EA7C 0x00091D18 Exception state (sv=0x14E10C80) PC=0x00094728; MSR=0x00009030; DAR=0xF002FEF4; DSISR=0x42000000; LR=0x0008ECB4; R1=0x0DA5BEF0; XCP=0x0000008C (Preemption) Backtrace: 0x0008F0A8 0x00091D18 Exception state (sv=0x14EF7280) PC=0x91A5C1C0; MSR=0x0200F030; DAR=0xF002FEF4; DSISR=0x42000000; LR=0x91A5C194; R1=0xBFFFD350; XCP=0x00000400 (Unknown code) Kernel version: Darwin Kernel Version 6.2: Tue Nov 5 22:00:03 PST 2002; root:xnu/xnu-344.12.2.obj~1/RELEASE_PPC ********* Mon Dec 2 21:56:39 2002 Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x032513b4 PC=0x0020e42c Latest crash info for cpu 0: Exception state (sv=0x14FB0000) PC=0x0020E42C; MSR=0x00001030; DAR=0x032513B4; DSISR=0x40000000; LR=0x0020E424; R1=0x0DA5BB40; XCP=0x0000000C (0x300 - Data access) Backtrace: 0x0022DF58 0x001E93B4 0x0008F814 0x00033AD8 0x00033CB4 0x00026814 0x0008EA7C 0x00091D18 Proceeding back via exception chain: Exception state (sv=0x14FB0000) previously dumped as "Latest" state. skipping... Exception state (sv=0x14E10C80) PC=0x00094728; MSR=0x00009030; DAR=0xF002FEF4; DSISR=0x42000000; LR=0x0008ECB4; R1=0x0DA5BEF0; XCP=0x0000008C (Preemption) Backtrace: 0x0008F0A8 0x00091D18 Exception state (sv=0x14EF7280) PC=0x91A5C1C0; MSR=0x0200F030; DAR=0xF002FEF4; DSISR=0x42000000; LR=0x91A5C194; R1=0xBFFFD350; XCP=0x00000400 (Unknown code) Kernel version: Darwin Kernel Version 6.2: Tue Nov 5 22:00:03 PST 2002; root:xnu/xnu-344.12.2.obj~1/RELEASE_PPC panic(cpu 0): 0x300 - Data access Latest stack backtrace for cpu 0: Backtrace: 0x00084E9C 0x000852CC 0x00027F8C 0x0008ECA8 0x00091D18 Proceeding back via exception chain: Exception state (sv=0x14FB0000) PC=0x0020E42C; MSR=0x00001030; DAR=0x032513B4; DSISR=0x40000000; LR=0x0020E424; R1=0x0DA5BB40; XCP=0x0000000C (0x300 - Data access) Backtrace: 0x0022DF58 0x001E93B4 0x0008F814 0x00033AD8 0x00033CB4 0x00026814 0x0008EA7C 0x00091D18 Exception state (sv=0x14E10C80) PC=0x00094728; MSR=0x00009030; DAR=0xF002FEF4; DSISR=0x42000000; LR=0x0008ECB4; R1=0x0DA5BEF0; XCP=0x0000008C (Preemption) Backtrace: 0x0008F0A8 0x00091D18 Exception state (sv=0x14EF7280) PC=0x91A5C1C0; MSR=0x0200F030; DAR=0xF002FEF4; DSISR=0x42000000; LR=0x91A5C194; R1=0xBFFFD350; XCP=0x00000400 (Unknown code) Kernel version: Darwin Kernel Version 6.2: Tue Nov 5 22:00:03 PST 2002; root:xnu/xnu-344.12.2.obj~1/RELEASE_PPC ********* Mon Dec 2 22:11:27 2002 panic(cpu 0): Unexpected user state trap(cpu 0): 0x00000401 DSISR=0x40000000 DAR=0x8fe4c104 PC=0x8fe1b644, MSR=0x0020d030 Latest stack backtrace for cpu 0: Backtrace: 0x00084E9C 0x000852CC 0x00027F8C 0x0008EDB0 0x00091D18 Proceeding back via exception chain: Exception state (sv=0x14FD9280) PC=0x8FE1B644; MSR=0x0020D030; DAR=0x8FE4C104; DSISR=0x40000000; LR=0x8FE1B61C; R1=0xBFFFFE70; XCP=0x00000400 (Unknown code) Kernel version: Darwin Kernel Version 6.2: Tue Nov 5 22:00:03 PST 2002; root:xnu/xnu-344.12.2.obj~1/RELEASE_PPC ********* _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. 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Re: IPSec command line tool on Jaguar?
by Jun-ichiro itojun Hagino 03 Dec '02

03 Dec '02

>Dear developer community, > >I need the ipsec command on Jaguar (for a WLAN in a student housing >community). It seems it is there already for Jaguar, >but not on mine :-) I found the following websites and informations. >Can anybody tell me how to find the command line tool for IPSec? /usr/sbin/setkey itojun _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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