July 2008 - Darwin-kernel - lists.apple.com

Re: kauth FILEOP_CLOSE_MODIFIED semantics for unexpectedly terminated processes.
by Quinn 11 Jul '08

11 Jul '08

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com <http://developer.apple.com/bugreporter/> S+E -- 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… At 12:13 +0400 11/7/08, Maxim Zhuravlev wrote: I've been explorering the kauth FILEOP scope and found out, that for unexpectedly terminated or exit()'d process, which hadn't explicitly closed a file handle it was writing to, a KAUTH_FILEOP_CLOSE notification with KAUTH_FILEOP_CLOSE_MODIFIED flag set isn't issued. This happens, cause exit() closes all handles bypassing close() syscall, which actually checks flags and issues that kind of notifications. I would classify that as a bug. I encourage you to file it. Please post the bug number so that I can keep an eye on it. Are there any over documented means to get the same semantics for that kind of processes? The only thing that springs to mind is to hook into KAUTH_SCOPE_VNODE. That's less than ideal (the vnode scope has lots of gotchas and is really intended for authorization rather than monitoring), but I can't think of anything better. This email sent to site_archiver(a)lists.apple.com

1 0

kauth FILEOP_CLOSE_MODIFIED semantics for unexpectedly terminated processes.
by Maxim Zhuravlev 11 Jul '08

11 Jul '08

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi, all! Thanks in advance, - Maxim. _______________________________________________ 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've been explorering the kauth FILEOP scope and found out, that for unexpectedly terminated or exit()'d process, which hadn't explicitly closed a file handle it was writing to, a KAUTH_FILEOP_CLOSE notification with KAUTH_FILEOP_CLOSE_MODIFIED flag set isn't issued. This happens, cause exit() closes all handles bypassing close() syscall, which actually checks flags and issues that kind of notifications. Are there any over documented means to get the same semantics for that kind of processes? This email sent to site_archiver(a)lists.apple.com

1 0

Re: Read/Write call interaction w/ UBC
by Michael Smith 09 Jul '08

09 Jul '08

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com = Mike _______________________________________________ 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 Jul 8, 2008, at 2:25 AM, Terry Lambert wrote: On Jul 7, 2008, at 7:21 PM, shailesh jain <coolworldofshail(a)gmail.com> wrote: I am writing a file system that does not support caching. I wanted to know, If by just passing NO_CACHE and CANT_CACHE option, I can disable entire caching ? As of my understanding, the options are just to disable name lookup etc caching and it cannot disable file content caching i.e where UBC comes into play. Can I disable file content caching i.e UBC ? (set it to UBC_INFO_NULL ?). Also, apple docs says that UBC for apple is different from FreeBSD. I wanted to know in what respect ? Read the sources. I put massive block comments in the UBC code for just such an emergency. 8-). Also, look at the sources for older versions of smbfs, which had similar issues. This email sent to site_archiver(a)lists.apple.com

1 0

Re: Read/Write call interaction w/ UBC
by Terry Lambert 08 Jul '08

08 Jul '08

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com /Shail _______________________________________________ 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 Jul 7, 2008, at 7:21 PM, shailesh jain <coolworldofshail(a)gmail.com> wrote: I am writing a file system that does not support caching. I wanted to know, If by just passing NO_CACHE and CANT_CACHE option, I can disable entire caching ? As of my understanding, the options are just to disable name lookup etc caching and it cannot disable file content caching i.e where UBC comes into play. Can I disable file content caching i.e UBC ? (set it to UBC_INFO_NULL ?). Also, apple docs says that UBC for apple is different from FreeBSD. I wanted to know in what respect ? Read the sources. I put massive block comments in the UBC code for just such an emergency. 8-). -- Terry This email sent to site_archiver(a)lists.apple.com

1 0

Re: Read/Write call interaction w/ UBC
by shailesh jain 08 Jul '08

08 Jul '08

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=domainkey-signature:received:received:message-id:date:from:to :subject:cc:in-reply-to:mime-version:content-type:references; bh=7X5H6+JQ4jU9NWAp5PBOnsn8XDo15wZJ9FMoVSX17Ic=; b=bU4GWkL3dD6dXc2Ew9JhKaNX72wYmiHbL6hpFvWA0RYuYKcdhla/MJt1OIiFAaNeqi Ftq6qrvoIAiDja2j18IVvfKgEfWUt2rnlTQG+uQEIvOK4OJS2cV1zq0hN9U1QwqNkS5V QidmwxSn7sKu98I1s/lCQda76GwGKMZWovGyM= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:references; b=XrMdIyHQPvbASH0TADWXSbO9lGEl/2cDZk0lldfGWvhaXJeUsRGJAoBN+R+G40nsV1 H7FkxHORvo8Vz/R9dOZMklADQYPxJZTbrEMHVcNI5cGQ6bdePIFTE6UzxiENB3Wcc691 qHVqD0jAhx4rE+FngNcTc4AsSJ/fdvvQOvTRQ= _______________________________________________ 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

Read/Write call interaction w/ UBC
by shailesh jain 08 Jul '08

08 Jul '08

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=domainkey-signature:received:received:message-id:date:from:to :subject:mime-version:content-type; bh=ds5RXgyHLe4PsnmH3jbxCPrG8cMphun4LdLMKacF6vI=; b=QyPUe6ZJrkBGsFCaXesRA+aUMkScujcb4Wf7k2QQutKSOpoLZDHeCg+FwF0KYGT4BI P71XOdb902wodaFdl7t/OY2OIaQbov5xjK/iKRaP7EsnsuJ7Oe1C2mKrqkU9ar4qJOpU iWBYqccJpYpoKtbxFAmr9MWM2yYpwkd+T8peQ= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type; b=v6Pv5v69nHlElL47UHsNokNjQy4vngyf8Q8wVeLnCMcvlMi7XZIGp4WdXQDWA8Vk4O 5tcVyM/X7F0/xfz3GNyNux3Pbn/k5/pwmMXGI9bRQRLrtf4gZDZFOZCO+/iPyQefYQuP vTYtC99RuA4zn1kF2Id1K1S/Ho0w+7DLPuwUI= _______________________________________________ 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