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Cross-Rename Support Closer For The Linux Kernel

Linux Kernel

Published on 13 January 2014 12:36 PM EST
Written by Michael Larabel in Linux Kernel
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The cross rename support is up to its third revision for hopeful inclusion soon in the mainline Linux kernel. The kernel work is to ultimately allow for two files to be exchanged in the file renaming process.

Miklos Szeredi, one of the developers working on the cross-rename support, explained the motivation on the mailing list patch series, "The purpose of extending rename is to add cross-rename, a symmetric variant of rename, which exchanges the two files. This allows interesting things, which were not possible before, for example atomically replacing a directory tree with a symlink, etc... This also allows overlayfs and friends to operate on whiteouts atomically."

With the set of 11 patches there is EXT4 support for cross-rename. Implementing support for other local file-systems is also an easy process since the heavy lifting is done by changes to the kernel's VFS layer, but additional work is required for cross-rename on network file-systems.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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