January 2012 - Darwin-kernel

Re: vfs: is there any way to distinguish read() for different file descriptors
by Michael Smith 31 Jan '12

31 Jan '12

_______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

1 0

Re: vfs: is there any way to distinguish read() for different file descriptors
by Ken Hornstein 31 Jan '12

31 Jan '12

>Is there any way to distinguish if operations (read/write/..) are run >against different descriptors? Currently fuse4x does an ugly hack - it >stores 3 descriptors per vnode - for read-only/write-only/rdrw descriptors. >It means if the same file is open 2 times with there same mode (e.g. >RDONLY) then fuse4x uses only one file descriptor. For fuse userspace it >looks like the file was opened only once and all read operations are done >for the same file descriptor. I feel your pain, because I ported a Linux filesystem to MacOS X and I had to deal with a ton of issues like this. Shantonu has already given you the authoritative answer (no), but it occurs to me that you have some alternate options. You get notified of an open with a VOP_OPEN, and you get the mode of the open at that time. So you could use that to create new file descriptors ... although you will probably have a hard time in practice matching up a request with a descriptor. You could at least distinguish between different modes of open. But something occurs to me - let's say three different processes open the same file with the same mode, so the fuse backend shares a descriptor among the different open requests. So what? I mean, how exactly is that a problem? You get a file offset and size with every request, so it's not an issue of tracking the offset in the descriptor. Seems to me this isn't a problem in practice ... unless I'm missing something (which is always possible). --Ken _______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

1 0

Re: vfs: is there any way to distinguish read() for different file descriptors
by Shantonu Sen 31 Jan '12

31 Jan '12

_______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

1 0

vfs: is there any way to distinguish read() for different file descriptors
by Anatol Pomozov 31 Jan '12

31 Jan '12

_______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

1 0

How to build kernel 10.8.0 (xnu-1503.15.3)
by HIWATASHI Kazuhiro 29 Jan '12

29 Jan '12

Hi, All. I want to build the kernel of Mac-OS-X 10.6.8 (xnu-1503.15.3), and make it operate by my Intel iMac. Mac-OS-X 10.6.8 (64 bits) is already installed in this Intel iMac. First, I add the define "osfmk/mach/machine.h.", because "CPUFAMILY_INTEL_SANDYBRIDGE" is not defined. I built by the following commands in order to create a 64-bit kernel. make ARCH_CONFIG="X86_64" KERNEL_CONFIG="RELEASE" The created kernel was replaced with the kernel of my iMac. I boot iMac, but it did not start. If the direction and method which have built 10.6.8 are known, please let me know. In addition, it was able to be made to start satisfactorily in 10.7.2 (xnu-1699.24.8). Thanks. ----------- Hiwatashi _______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

1 0

which mailing list is for ipsec / racoon related stuff ?
by Athanasios Douitsis 23 Jan '12

23 Jan '12

_______________________________________________ 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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

1 0

Re: ifnet_attach/detach notifications in kext
by Justin C. Walker 19 Jan '12

19 Jan '12

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Jan 18, 2012, at 14:21 , Josh Graessley wrote: > > On Jan 18, 2012, at 12:48 PM, Gary Kratkin wrote: >> >> How can I get notifications in my kext of network interfaces attaching and detaching? I'm specifically interesting in utun interfaces, which aren't picked up by listening on IONetworkInterface matching notifications. It seems I should be able to listen on the associated kernel event, but I don't see any examples of doing that from kernel space. > > I believe you can do that in the kernel using a kernel event socket. You'll need to use the socket kpis to create the in-kernel kernel event socket to listen for notifications (sock_socket, etc... from sys/kpi_socket.h). See: > http://developer.apple.com/library/mac/#documentation/Darwin/Reference/Kern… > > I'm not aware of a good example. I'm just guessing, but doesn't 'scutil' provide notifications (so might have an example of how to code such)? Its code is available. Justin -- Justin C. Walker, Curmudgeon at Large Institute for the Absorption of Federal Funds ----------- If it weren't for carbon-14, I wouldn't date at all. ----------- _______________________________________________ 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

1 0

Re: ifnet_attach/detach notifications in kext
by Josh Graessley 18 Jan '12

18 Jan '12

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Jan 18, 2012, at 12:48 PM, Gary Kratkin wrote: > Hello, > > How can I get notifications in my kext of network interfaces attaching and detaching? I'm specifically interesting in utun interfaces, which aren't picked up by listening on IONetworkInterface matching notifications. It seems I should be able to listen on the associated kernel event, but I don't see any examples of doing that from kernel space. I believe you can do that in the kernel using a kernel event socket. You'll need to use the socket kpis to create the in-kernel kernel event socket to listen for notifications (sock_socket, etc... from sys/kpi_socket.h). See: http://developer.apple.com/library/mac/#documentation/Darwin/Reference/Kern… I'm not aware of a good example. -josh _______________________________________________ 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

1 0

ifnet_attach/detach notifications in kext
by Gary Kratkin 18 Jan '12

18 Jan '12

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hello, How can I get notifications in my kext of network interfaces attaching and detaching? I'm specifically interesting in utun interfaces, which aren't picked up by listening on IONetworkInterface matching notifications. It seems I should be able to listen on the associated kernel event, but I don't see any examples of doing that from kernel space. Thanks for any help, Gary _______________________________________________ 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

1 0

Re: Kext ring level
by José Cornado 03 Jan '12

03 Jan '12

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=SneWe3BfuvVU4xBSsDqD9kL9/2YUFdETfFl5kN+JNFg=; b=aYo/w3PhH3pSIyXtvPJVzDuK+jwcZEftLWqbXOzDClsaUA6BVDpcmYUp6+s24c+d1y PTAgUzL46r+EWGlConokdvKFRI9fGon7JP7vgFHx4WTiriYrHl31eGsC0Dfus4Q6k0h4 IAff/FL0SQ/whqCNwhrMNE0ddeTexOAlxutIM= _______________________________________________ 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

1 0