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Ernesto A. Fernández
eeb18a4107
Begin work to support file writes. To this end, add functions to write file extent records and to deal with the new data stream record type. A whole new b-tree needs to be used as well: the extent reference tree. Adjust the node and query code to deal with it. There is too much I don't understand about the vfs, and writes look tricky, so try to keep things simple for now. Don't allow writes through mmap(), only create extents with a single block (even if this defeats the whole purpose of extents), and neglect to handle short writes correctly. Don't implement any form of truncation yet, and just let apfs_delete_inode() fail when the inode is not empty. Signed-off-by: Ernesto A. Fernández <ernesto@corellium.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.