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

VNODE sample under Tiger
by Pezeshgi, Shahriar 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: AcVPSLtVuFIKqgPQQme2jmepKdmY1g== Thread-topic: VNODE sample under Tiger Hi all Can someone help me with this question? Where can I find information regarding vnode_open, vnode_close and etc function in Tiger? They should be in kernel source code but I haven't find them, I need exact file or project name. Thanks Shahriar _______________________________________________ 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

blocking writes and tiger update
by Nicolas Berloquin 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hello ! thanks for any pointers or hints ^_^ _______________________________________________ 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'm new to the list, but I saw a few familiar names posting here ;D I've searched the archives about blocking writes (or other accesses) on a storage device and found some suggestions like : 1 - use a stacked nullfs-like driver and call the 'super' methods. 2 - never use a stacked driver... ever 3 - the docs on vfs say that vfs are going to change, so don't use that. (even at todays' date, ie after tiger release.) Since the docs on developer.apple.com haven't been updated for tiger, I'm wondering what the current state of affair is about all that. Is is still verboten to use nullfs-like techniques ? Will apple implement an NKE type of API, FSKE with usable hooks ? This email sent to site_archiver(a)lists.apple.com

1 0

Re: NKE sample code
by Shawn Erickson 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On May 2, 2005, at 9:32 AM, Steven Palm wrote: On May 2, 2005, at 10:54 AM, Justin Walker wrote: On May 1, 2005, at 7:44, Vincent Pottier wrote: -Shawn _______________________________________________ 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.… Hi list, I get TCPLog sample code from DTS a few month ago (Tiger version). I just try to rebuild the version I get and encounter a few fatal error, before searching to solve it, is there a new version already debugged? AFAICT, the TCPLog code is not yet posted. I suspect you will need to talk with DTS. And I probably already know the answer, but is this example code available to NON-ADC members? (Well, I'm an ADC Online member, but you know that gets you... :-) Try asking DTS... <http://developer.apple.com/technicalsupport/ index.html> You are only asking for a code example that hasn't been published not for support so they may just give it to you. This email sent to site_archiver(a)lists.apple.com

1 0

Re: sbdrop - count not zero?
by Justin Walker 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On May 2, 2005, at 9:26, Stephane Sudre wrote: On 2 mai 05, at 17:44, Justin Walker wrote: On May 2, 2005, at 7:11, Stephane Sudre wrote: I've seen this strange kernel lof record in system.log on 10.4: There's always madness in method :-} Cheers, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- If you're not confused, You're not paying attention -------- _______________________________________________ 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.… "kernel[2] sbdrop - count not zero" It means that, in the process of clearing out a sockbuf (dropping a specified number of bytes), the mbuf chain ran out before the count got to zero. It used to be a panic, but has been replaced by printf/log. File a bug. Filing a bug report to tell them to put back a panic() call? I'm not that mad :) File the bug, with context info, in the fond hope that the information may help isolate the problems. This email sent to site_archiver(a)lists.apple.com

1 0

Re: NKE sample code
by Steven Palm 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com 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.… On May 2, 2005, at 10:54 AM, Justin Walker wrote: On May 1, 2005, at 7:44, Vincent Pottier wrote: Hi list, I get TCPLog sample code from DTS a few month ago (Tiger version). I just try to rebuild the version I get and encounter a few fatal error, before searching to solve it, is there a new version already debugged? AFAICT, the TCPLog code is not yet posted. I suspect you will need to talk with DTS. And I probably already know the answer, but is this example code available to NON-ADC members? (Well, I'm an ADC Online member, but you know that gets you... :-) This email sent to site_archiver(a)lists.apple.com

1 0

Re: sbdrop - count not zero?
by Stephane Sudre 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 2 mai 05, at 17:44, Justin Walker wrote: On May 2, 2005, at 7:11, Stephane Sudre wrote: I've seen this strange kernel lof record in system.log on 10.4: _______________________________________________ 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.… "kernel[2] sbdrop - count not zero" It means that, in the process of clearing out a sockbuf (dropping a specified number of bytes), the mbuf chain ran out before the count got to zero. It used to be a panic, but has been replaced by printf/log. File a bug. Filing a bug report to tell them to put back a panic() call? I'm not that mad :) This email sent to site_archiver(a)lists.apple.com

1 0

Re: NKE sample code
by Justin Walker 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On May 1, 2005, at 7:44, Vincent Pottier wrote: Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Some people have a mental horizon of radius zero, and call it their point of view. -- David Hilbert -------- _______________________________________________ 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.… Hi list, I get TCPLog sample code from DTS a few month ago (Tiger version). I just try to rebuild the version I get and encounter a few fatal error, before searching to solve it, is there a new version already debugged? AFAICT, the TCPLog code is not yet posted. I suspect you will need to talk with DTS. This email sent to site_archiver(a)lists.apple.com

1 0

Re: sbdrop - count not zero?
by Justin Walker 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On May 2, 2005, at 7:11, Stephane Sudre wrote: I've seen this strange kernel lof record in system.log on 10.4: Regards, Justin Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Men are from Earth. Women are from Earth. Deal with it. -------- _______________________________________________ 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.… "kernel[2] sbdrop - count not zero" It means that, in the process of clearing out a sockbuf (dropping a specified number of bytes), the mbuf chain ran out before the count got to zero. It used to be a panic, but has been replaced by printf/log. File a bug. Can it be related to a sudden stop of a TCP transfer/download? I suppose it's possible. Is this a repeating/recurring condition? If so, get a tcpdump trace of the packet traffic while it's in progress. This email sent to site_archiver(a)lists.apple.com

1 0

Re: sbdrop - count not zero?
by Laurent Dumont 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Microsoft-Entourage/11.1.0.040913 Stéphane, This means that there is a discrepancy in the socket buffer between the amount of data we expect (from the internal socket buffer counter) and the actual data we found by following the mbuf chain while dropping it. Because sbdrop is most likely called from sbflush in that case (we're cleaning up the socket...) this is not a deadly situation, but it should be understood as it may lead to mbuf leaks. Laurent on 5/2/05 07:11, Stephane Sudre at ssudre(a)intego.com wrote: > I've seen this strange kernel lof record in system.log on 10.4: > > "kernel[2] sbdrop - count not zero" > > What is it supposed to mean? > > Can it be related to a sudden stop of a TCP transfer/download? > _______________________________________________ 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: Accessing to a file from a KEXT
by John Dalgliesh 02 May '05

02 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi, Good timing! I recently encountered the same problem. You should have a look at the recent and ongoing threads on the darwin-drivers mailing list concerning this topic. I've got it to work in my drivers, and in fact the KPI in Tiger makes it a lot nicer than before, but am coming under heavy fire for doing so. Just get the kernel source and grep it for examples if you really want to know how to use the vnode_xxx functions. They're pretty straightforward. {P^/ On Mon, 2 May 2005, Pezeshgi, Shahriar wrote: > > Hi there > I have a problem with our USB DSL Modem driver under new OS X (Tiger). > Basically we need to read a configuration file during driver startup ( I > know that it's a BAD idea to access to file system from a KEXT but this > is the way our driver has been developed originally under OS X 10.1). > This driver is working properly under different version of OS X (10.1.x, > 10.2.x and 10.3.x) but it's not working under Tiger, it's complaining > about missing symbols like _vn_open, _vn_close and etc. I think new > vnode api doesn't support old functions under Tiger (am I right?), so I > looked at KPI->vnode documents but there is no descriptions for > functions like vnode_open, vnode_close and etc. Where can I find more > details about vnode api? > > Yours > Shahriar > _______________________________________________ > 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/johnd%40defyne.org > > This email sent to johnd(a)defyne.org > _______________________________________________ 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