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

User CLient For Third Party Driver
by Anshul Makkar 05 May '05

05 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Organization: Samsung India Electronics Limited Hello, Can we write a "User Client " in kernel space for a third party driver eg nvidia graphics driver. or we have to write a graphics driver along with the user client. What we have noticed is that in Simple User Client Sample code , if we change the name of KMyDriverIOKitClassName from com_apple_dts_simpledriver to ATIRadeon8500 ie class of already loaded kext , then user client fails to open the resultant kext . Does this implies that we have to write a driver along with the user client then only user client will succeed.. As such user client hs no independent entity. When I debugged the Sample Code Kext file I found user clients function in the kext file..Does it implies that user client is compiled as part of driver and is included in the resultant kext. Can we make an independent User Client as a kext file. I think user client can be build only along with a sriver to which it will serve as a client. Thanking You _______________________________________________ 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: Question on KPI / NKE : sys/select.h : struct selinfo ?
by Steven Palm 05 May '05

05 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com A question on sys/select.h / selinfo as used in a kext: I see this defined in sys/select.h: /* * Used to maintain information about processes that wish to be * notified when I/O becomes possible. */ struct selinfo; __BEGIN_DECLS void selrecord(proc_t selector, struct selinfo *, void *); void selwakeup(struct selinfo *); void selthreadclear(struct selinfo *); __END_DECLS struct selinfo rsel; selthreadclear(&rsel); selrecord(p, &rsel, wql); selwakeup(&rsel); On May 4, 2005, at 3:52 PM, Josh Graessley wrote: The send and receive queue structures were removed from the ifnet structure. Thanks for the pointers on recreating them for use in the tun/tap driver. I'm having one odd issue surrounding that, but I'm going to work on it a bit more before I post back here. But the selinfo structure is not actually defined anywhere here... Should it be? The code I am trying to work with is doing this definition and these calls: However the compiler complains because it is lacking a complete definition for rsel. I can't even declare it a as a pointer, because I have nothing to use sizeof() against to find out how much memory to alloc. _______________________________________________ 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: Question on KPI / NKE : ifp->snd
by Josh Graessley 04 May '05

04 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com struct my_ifqueue { void *ifq_head; void *ifq_tail; int ifq_len; int ifq_maxlen; int ifq_drops; }; struct my_driver_softc_stuff { struct my_ifqueue snd_queue; struct my_ifqueue rcv_queue; . . . }; -josh On May 4, 2005, at 1:39 PM, Steven Palm wrote: Hi all, Thanks, This email sent to jgraessley(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/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com The send and receive queue structures were removed from the ifnet structure. The structures weren't actually used by the stack, they were just their for drivers convenience. We intended to leave the ifqueue structure in the header files so drivers could create their own queues that they store in their own private storage area, usually hanging of softc. Unfortunately, these structures didn't make it in to the headers, so you can define your own. You can use the IF_*_MBUF macros in sys/kpi_mbuf.h to enqueue mbufs on the queues created above. To enqueue, use IF_ENQUEUE_MBUF. To prepend the queue with a new mbuf, use IF_PREPEND_MBUF. Finally, to dequeue an mbuf, use IF_DEQUEUE_MBUF. Not sure if -kernel or -drivers is the right list, please direct me if I guessed wrong. -drivers mentioned hardware drivers, and this is not talking to hardware, but a pure software network interface. I'm plodding my way through trying to convert the tun/tap driver over to the new KPI's. Maybe this is more work than I thought, but so far I've been replacing the mutex, mbuf, and ifnet stuff with the new "equivalents", however the tun/tap code is doing some work with the ifqueues on the interface, and I can see no API call to get this information, and you can not access the ifnet->snd structure element directly (for good reason, I know). I must be daft and overlooking it, or there is much more rework required than I was hoping was in there. Anyway, this is a learning project for me, surely Mattias will finish the rework before I do, even if it takes him a few weeks. :-) But, hope is good, and I may get it to work eventually and will have learned something in the process. Steve _______________________________________________ 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 smime.p7s

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Question on KPI / NKE : ifp->snd
by Steven Palm 04 May '05

04 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi all, Thanks, Steve _______________________________________________ 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.… Not sure if -kernel or -drivers is the right list, please direct me if I guessed wrong. -drivers mentioned hardware drivers, and this is not talking to hardware, but a pure software network interface. I'm plodding my way through trying to convert the tun/tap driver over to the new KPI's. Maybe this is more work than I thought, but so far I've been replacing the mutex, mbuf, and ifnet stuff with the new "equivalents", however the tun/tap code is doing some work with the ifqueues on the interface, and I can see no API call to get this information, and you can not access the ifnet->snd structure element directly (for good reason, I know). I must be daft and overlooking it, or there is much more rework required than I was hoping was in there. Anyway, this is a learning project for me, surely Mattias will finish the rework before I do, even if it takes him a few weeks. :-) But, hope is good, and I may get it to work eventually and will have learned something in the process. This email sent to site_archiver(a)lists.apple.com

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Re: divert_packet and ifnet_hdrlen
by Josh Graessley 04 May '05

04 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -josh On May 4, 2005, at 7:28 AM, Stephane Sudre wrote: The case I'm thinking about is this kind of backtrace: dlil_output ip_output_list divert_packet sosend socketpair sendto unix_syscall This email sent to jgraessley(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/site_archiver%40lists.… ifnet_hdrlen is set by the interface. In some cases, the interface may have a variable length header such as PPP. Ethernet also has an issue where some protocols, such as AppleTalk, use 802.3 which extends the header by another 8 bytes. Can the value returned by ifnet_hdrlen for the interface for the iff_output callback of a kpi interface filter be wrong in some cases? _______________________________________________ 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 site_archiver(a)lists.apple.com

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Kernel or User Problem with Launchd
by Jerry LeVan 04 May '05

04 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi, I can't think of anyplace else to ask for info... In panther I solved the problem of having cron run at the designated time ( 3:15 for daily stuff...) by enqueueing a "wakeup" request via the PM Queue Manager for a couple of minutes ahead of time time that cron was supposed to fire. (The cron job would also enqueue a wakeup for the next day). This has worked quite well in Panther for the last year. This last weekend I installed Tiger and of course found that "launchd" is the new one true way :) com.apple.periodic-daily.plist is now the "job" that does the periodic daily stuff that cron used to do. According to the plist it is supposed to trigger at 3:15 just as cron did. Regrettably it appears that launchd is *not* launching the job. The system log shows the system was awakened at 3:13:30. However none of the logs are rotated and there is nothing appended to daily.out the log file. I *can* manually invoke the job via launchctl and everything works like it ought to ( except that I can't mail anything to me...I get a message from csh that $home is not defined and I get empty mail. How does csh get involved?) Any suggestions as to why the job is "evidently" not getting launched at the appropriate time? If the system is put to sleep does launchd lose track of when the next job is supposed to run? My PMQueue manager stuff can be found at: http://homepage.mac.com/levanj/Cocoa Help... Jerry _______________________________________________ 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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kdp-reboot
by Andrew Gallatin 04 May '05

04 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Kudos to whoever was responsible for the kdp-reboot command in Tiger. It is so nice to be able to reboot my development box without having to walk down the hall to the room where it is. Esp. since I could never get it to power back on when A/C power is switched on/off via a remote-control power strip. Thanks! Drew _______________________________________________ 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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divert_packet and ifnet_hdrlen
by Stephane Sudre 04 May '05

04 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com The case I'm thinking about is this kind of backtrace: dlil_output ip_output_list divert_packet sosend socketpair sendto unix_syscall _______________________________________________ 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.… Can the value returned by ifnet_hdrlen for the interface for the iff_output callback of a kpi interface filter be wrong in some cases? This email sent to site_archiver(a)lists.apple.com

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Re: blocking writes and tiger update
by Nicolas Berloquin 03 May '05

03 May '05

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: blocking writes and tiger update
by Mike Smith 03 May '05

03 May '05

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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