| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 31 Jan 2008 19:14:01 +0100 From: Andi Kleen <andi@...stfloor.org> To: Lars Noschinski <lklml@...noschinski.de> Cc: linux-kernel@...r.kernel.org Subject: Re: How does ext2 implement sparse files? Lars Noschinski <lklml@...noschinski.de> writes: > For an university project, we had to write a toy filesystem (ext2-like), > for which I would like to implement sparse file support. For this, I > digged through the ext2 source code; but I could not find the point, > where ext2 detects holes. > > As far as I can see from fs/buffer.c, an hole is a buffer_head which is > not mapped, but uptodate. But I cannot find a relevant source line, > where ext2 makes usage of this information. It does not explicitely detect holes; holey data is just never written so no space for it is allocated. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists