September 2018 - Darwin-kernel

Re: How to tell if a vnode resides in a usb mass storage device?
by Haohao Lee 28 Sep '18

28 Sep '18

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=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=KS1IhqvGzYuywZB3Fpn3HjLINL4qe3RdMjt0imU0rCY=; b=eRw2DTEjPF8xa6ALDoYakAl2lEHiIrRNHUqOpa8FFgDHqHTu6MLWDwWfVNgEFOVeQL ett1shbYKWVUXXg/JJGADQAFLCmaQErwDj9dKhMY0BsIB55oT7nuIysfY4smTsFjhcO4 8Js7Sqj8K2OLIGueC6ayWAHwEEAHAXpMz0LOiV2wTIBv7CSqWbCRjvaZKOkack7fltIn 54pBWMyA1Pbfs+yINrZGpf1AajiuXndoCVExW1cmkX12uTx27BtHamXSTHna6pHp+a8+ OlE9pEaO4eAKxZ2K4kcXQerHgB/S0Nc1o7xRTQvUGhTzC2lfCs45vQwJuskaeMEu3xlh pgWA== Thanks, I'll check it out. On Tue, Sep 25, 2018 at 7:17 PM Irad K <iradization(a)gmail.com> wrote: > You can get the vnode's fsid and decide whether it matches that of the usb > device. > > > uint64_t getVnodeFsid(const vfs_context_t ctx, const vnode_t vp) > > { > > struct vnode_attr vap; > > VATTR_INIT(&vap); > > VATTR_WANTED(&vap, va_fileid); > > vnode_getattr(vp, &vap, ctx); > > return (vap.va_fileid); > > } > > now you need to know what's the usb mount fsid which can be done in > user-space and passed to your driver. > you can use getmntinfo command and iterate the mount drives until you get > to your desired device (by checking f_mntonname) > > Irad > > > On Tue, Sep 25, 2018 at 10:58 AM Haohao Lee <hayatelee(a)gmail.com> wrote: > >> Hi folks, >> >> We need find if a vnode (file) is from a usb drive. More generally, do we >> have a way to get device info from a vnode. >> >> It can be done easily in Linux via super_block stuff, but there is no >> such thing in xnu. >> >> Any suggestion is appreciated! >> >> Hao >> _______________________________________________ >> 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/iradization%40gmail.c… >> >> This email sent to iradization(a)gmail.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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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darwin 18.0 changelog
by Stefan Parvu 26 Sep '18

26 Sep '18

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi, Is there any change log or release notes where we could see what has changed between darwin 17.x and 18.0 branches ? Thanks, Stefan _______________________________________________ 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

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Re: How to tell if a vnode resides in a usb mass storage device?
by Irad K 25 Sep '18

25 Sep '18

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=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=kG9XQlpEeqz+Ml/hU+qyYNJR8JX13TffTvIbls+bxCc=; b=SmeZTj/+98Ef6KXs9FN1Q7A/ML7F8i3zFia8/Bo7ew/SlD7drH+nGGxJ79I/i+Vmr2 jur7olosxu8OqebkJxYbHmYXY+hoZFVJyey9HNbx6Ui13Z6a7GqKSrWSGyYiltZkT/OJ ImV2zJihzMrMGjN65YQelDaCvFlBMNlWeIkFDKXXpyGJqbOIYELkFVRhG/U0LLBJui6p +dTudFbMPvHNLzilRR8+MSV37S8fFFd9C25LO2wO2eL4hcYgEuYn8T6b4MEqZNUqNRor EjFSO/PpnlxWr4MrbWe7SZlqe0LV0eWI8sD0BEy+Tsam2eBxSNZYta2QvD4AVkBBdov0 M7hg== You can get the vnode's fsid and decide whether it matches that of the usb device. uint64_t getVnodeFsid(const vfs_context_t ctx, const vnode_t vp) { struct vnode_attr vap; VATTR_INIT(&vap); VATTR_WANTED(&vap, va_fileid); vnode_getattr(vp, &vap, ctx); return (vap.va_fileid); } now you need to know what's the usb mount fsid which can be done in user-space and passed to your driver. you can use getmntinfo command and iterate the mount drives until you get to your desired device (by checking f_mntonname) Irad On Tue, Sep 25, 2018 at 10:58 AM Haohao Lee <hayatelee(a)gmail.com> wrote: > Hi folks, > > We need find if a vnode (file) is from a usb drive. More generally, do we > have a way to get device info from a vnode. > > It can be done easily in Linux via super_block stuff, but there is no such > thing in xnu. > > Any suggestion is appreciated! > > Hao > _______________________________________________ > 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/iradization%40gmail.c… > > This email sent to iradization(a)gmail.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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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How to tell if a vnode resides in a usb mass storage device?
by Haohao Lee 25 Sep '18

25 Sep '18

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=20161025; h=mime-version:from:date:message-id:subject:to; bh=0OEKndcHrlQvpbRFaELpfTzCGYEFqQG7KHv45Ox6VIs=; b=HCnup+aceH0v2wprbwafU1h9+PNtVvxHQKwDY7pzwTVHE0X/SOkMxX7aemF8Ond3JN 2RoWVMC1zy31yd1Sp8RmQa9SuZM2to72AoUMYfsa4OdNTuvv6y+Qzq9N1WVue4ZX/AL4 OA4YNhAMEzvCSLtTejsRAdhyE3N0RNICjuBheQxc3iA2kuntMkKkYUMdPivTKBbdCH0m lgGdNKX6U3anjd57bxpyxYXZuCDD7KDneWP896di99n8nQ55nLalOs5OBfMW+zbW3JW7 Q+6EDoiZ3cWVfbiPzqhgIJoSJtnkFilayJR9EFeTXVCW4sLxsrm+E4SS6Y9gAUoBPXjQ sAfQ== Hi folks, We need find if a vnode (file) is from a usb drive. More generally, do we have a way to get device info from a vnode. It can be done easily in Linux via super_block stuff, but there is no such thing in xnu. Any suggestion is appreciated! Hao _______________________________________________ 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

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Re: Hello, need some help about socket filter (NKE) development
by Haohao Lee 25 Sep '18

25 Sep '18

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=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=+7f6Sq9+XJVoq1QPgWFt1gEXR8HYhcJs3OxrAg3gSko=; b=kcH5cUDH3wzbWUqJIl3Y2M4cSN/oXJSSCqsfu0tH4lGCEaFfXTPVWu5WTfchN28/65 RCLXvg9umEc97bpVM5lqALZEJ75ihkgpqrSgORd8CwyutKkxwfL3iIXm4vqROCdW4cy3 LQeJqNm99jSh2mc5EmuFu6uo7QnirxRU3KfyCyT/3BeMOlM2Ie6Xjoeq9xCr3HBe2Fuh z10FzjDUtGadOwjIZpaCeseM2MMBO9Ts9/nC+283aYseV6iEVYtXwbt5lkWNSJPrJ0DO rVJ0dpmwBw1VnC5V3akVdNuuuFWbOfOT/JbGehysw9snTewxbX81WbIctFCx0JRNgJsg XHwA== Finally, the solution is to record the local and remote addresses in sf_notify_fn which will be called in all kinds of state changes (connecting, connected, etc.), then try to block some of them in sf_data_cout and sf_data_in by returning errors. This approach will let the tcp handshake packets pass, but will block the connection later. On Tue, Sep 18, 2018 at 3:47 AM Derek Fawcus < dfawcus+lists-apple-darwin-kernel(a)employees.org> wrote: > On Fri, Sep 14, 2018 at 02:40:43PM +0800, Haohao Lee wrote: > > typedef errno_t (*sf_connect_out_func)(void *cookie, socket_t so, const > > struct sockaddr *to); > > Only remote address is provided. > > > > How can I get the local address in sf_connect_out_func or is there > another > > way to achieve this? > > I've not checked the darwin source for this, but generally connect seems to > do an internal bind first if not already called by the user. > > So maybe there will be an initial form of bind callback from where you can > stash the source address? > > DF > _______________________________________________ > 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/hayatelee%40gmail.com > > This email sent to hayatelee(a)gmail.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: https://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: Darwin-kernel Digest, Vol 15, Issue 30
by Prokash Sinha 20 Sep '18

20 Sep '18

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com It was my bad. Now got them running … Basically bundles have same name -Pro > On Sep 20, 2018, at 1:24 PM, Prokash Sinha <prokash(a)garlic.com> wrote: > > Thanks so much, Eskimo! ! > > Yeah, that was the thinking - Why would there be just one filter …. > > Now I need to dig to see why it is not loading the 2nd one. I’m testing on > Mojave, but it should be fine. > > Also I subscribed to the MacNetworkProg group so I will post there anything > related to Networking. > > -Pro > >> On 19 Sep 2018, at 21:31, Prokash Sinha <prokash(a)garlic.com> wrote: >> >>> So there are two returns to indicate, if the kernel continue thru the chain >>> or not. >> >> It’s based on the function result: >> >> * 0 sends the request down the chain >> >> * `EJUSTRETURN` prevents the request going down the chain but doesn’t signal >> an error to the caller >> >> * any other error prevents the request going down the chain and signals that >> error to the caller >> >> You can see this in action in Darwin. For example, consider your >> `sf_data_out` function. It’s called by `sflt_data_out`, which iterates >> through the filters call the `sf_data_out` on each filter. That returns if >> it gets any error. The caller, `sosend`, specifically looks for >> `EJUSTRETURN` and… well… just returns >> >> <https://opensource.apple.com/source/xnu/xnu-4570.1.46/bsd/kern/kpi_socketfi…> >> >> <https://opensource.apple.com/source/xnu/xnu-4570.1.46/bsd/kern/uipc_socket.c> >> >> ps You might want to post your socket filter questions to the MacNetworkProg >> mailing list. While I’m happy to answer them here, that list has other >> members with direct experience with this stuff. >> >> <https://lists.apple.com/mailman/listinfo/macnetworkprog> >> >> Share and Enjoy >> -- >> Quinn "The Eskimo!" <http://www.apple.com/developer/> >> Apple Developer Relations, Developer Technical Support, Core OS/Hardware >> >> >> On 20 Sep 2018, at 17:37, Prokash Sinha <prokash(a)garlic.com> wrote: >> >>> As it turned out, it seems like not possible to have more than one socket >>> filter for same protocol … >> >> That’s definitely not correct. I’m not sure why your second socket filter >> is failing to register, but multiple socket filters are supported. >> >> Share and Enjoy >> -- >> 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: https://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: Darwin-kernel Digest, Vol 15, Issue 30
by Prokash Sinha 20 Sep '18

20 Sep '18

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thanks so much, Eskimo! ! Yeah, that was the thinking - Why would there be just one filter …. Now I need to dig to see why it is not loading the 2nd one. I’m testing on Mojave, but it should be fine. Also I subscribed to the MacNetworkProg group so I will post there anything related to Networking. -Pro > On 19 Sep 2018, at 21:31, Prokash Sinha <prokash(a)garlic.com> wrote: > >> So there are two returns to indicate, if the kernel continue thru the chain >> or not. > > It’s based on the function result: > > * 0 sends the request down the chain > > * `EJUSTRETURN` prevents the request going down the chain but doesn’t signal > an error to the caller > > * any other error prevents the request going down the chain and signals that > error to the caller > > You can see this in action in Darwin. For example, consider your > `sf_data_out` function. It’s called by `sflt_data_out`, which iterates > through the filters call the `sf_data_out` on each filter. That returns if > it gets any error. The caller, `sosend`, specifically looks for > `EJUSTRETURN` and… well… just returns > > <https://opensource.apple.com/source/xnu/xnu-4570.1.46/bsd/kern/kpi_socketfi…> > > <https://opensource.apple.com/source/xnu/xnu-4570.1.46/bsd/kern/uipc_socket.c> > > ps You might want to post your socket filter questions to the MacNetworkProg > mailing list. While I’m happy to answer them here, that list has other > members with direct experience with this stuff. > > <https://lists.apple.com/mailman/listinfo/macnetworkprog> > > Share and Enjoy > -- > Quinn "The Eskimo!" <http://www.apple.com/developer/> > Apple Developer Relations, Developer Technical Support, Core OS/Hardware > > > On 20 Sep 2018, at 17:37, Prokash Sinha <prokash(a)garlic.com> wrote: > >> As it turned out, it seems like not possible to have more than one socket >> filter for same protocol … > > That’s definitely not correct. I’m not sure why your second socket filter is > failing to register, but multiple socket filters are supported. > > Share and Enjoy > -- > 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: https://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: Chaining socket filters
by Quinn "The Eskimo!" 20 Sep '18

20 Sep '18

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 20 Sep 2018, at 17:37, Prokash Sinha <prokash(a)garlic.com> wrote: > As it turned out, it seems like not possible to have more than one socket > filter for same protocol … That’s definitely not correct. I’m not sure why your second socket filter is failing to register, but multiple socket filters are supported. Share and Enjoy -- 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: https://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: Chaining socket filters
by Prokash Sinha 20 Sep '18

20 Sep '18

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com As it turned out, it seems like not possible to have more than one socket filter for same protocol ( like ipv4), second one fails with error at registration time ). Also not sure if one of them can be global and another on demand. I assume it is the same at IP layer, and IF layer! Correct me if I’m wrong . Also I assume the DLIL_ ( data link layer if ) filtering is not encouraged and perhaps on the verge of deprecation. Any input/thought ? > On Sep 19, 2018, at 1:31 PM, Prokash Sinha <prokash(a)garlic.com> wrote: > > Folks, > > I’ve a question about the possibility of chaining socket filter. So assume I > have two socket filters, and I want to register them ( let’s say globally ). > > Now I would assume they would be chained along with the existing ones ( if > any ). Now what is the mechanism of hand-off ( For example, a shared ISR > vector can have multiple interrupts registered thru a chain. Or like multiple > exception handling registered in some stack fashion ). > > So there are two returns to indicate, if the kernel continue thru the chain > or not. > > Is it possible ? If so, then what would be the return indicator/value so that > the Network BF module can pass it along the chain. And what would be the > value to cut short ( of course without error, something like EJUSTRETURN ??? > ). > > > Thanks, > Prokash _______________________________________________ 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

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Re: IOSharedDataQueue Bug
by Quinn "The Eskimo!" 20 Sep '18

20 Sep '18

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 20 Sep 2018, at 12:29, Ricardo Ungureanu <ricardoungureanu(a)gmail.com> wrote: > I have just submitted a bug report: # 44636964. Much obliged! Share and Enjoy -- 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: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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