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1645c283a8
[BUG] There is a bug report that ntfs2btrfs had a bug that it can lead to transaction abort and the filesystem flips to read-only. [CAUSE] For inline backref items, kernel has a strict requirement for their ordered, they must follow the following rules: - All btrfs_extent_inline_ref::type should be in an ascending order - Within the same type, the items should follow a descending order by their sequence number For EXTENT_DATA_REF type, the sequence number is result from hash_extent_data_ref(). For other types, their sequence numbers are btrfs_extent_inline_ref::offset. Thus if there is any code not following above rules, the resulted inline backrefs can prevent the kernel to locate the needed inline backref and lead to transaction abort. [FIX] Ntrfs2btrfs has already fixed the problem, and btrfs-progs has added the ability to detect such problems. For kernel, let's be more noisy and be more specific about the order, so that the next time kernel hits such problem we would reject it in the first place, without leading to transaction abort. Link: https://github.com/kdave/btrfs-progs/pull/622 Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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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.