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.
Filipe Manana
authored
commit 4751dc99 upstream. During log replay, whenever we need to check if a name (dentry) exists in a directory we do searches on the subvolume tree for inode references or or directory entries (BTRFS_DIR_INDEX_KEY keys, and BTRFS_DIR_ITEM_KEY keys as well, before kernel 5.17). However when during log replay we unlink a name, through btrfs_unlink_inode(), we may not delete inode references and dir index keys from a subvolume tree and instead just add the deletions to the delayed inode's delayed items, which will only be run when we commit the transaction used for log replay. This means that after an unlink operation during log replay, if we attempt to search for the same name during log replay, we will not see that the name was already deleted, since the deletion is recorded only on the delayed items. We run delayed items after every unlink operation during log replay, except at unlink_old_inode_refs() and at add_inode_ref(). This was due to an overlook, as delayed items should be run after evert unlink, for the reasons stated above. So fix those two cases. Fixes: 0d836392 ("Btrfs: fix mount failure after fsync due to hard link recreation") Fixes: 1f250e92 ("Btrfs: fix log replay failure after unlink and link combination") CC: stable@vger.kernel.org # 4.19+ Signed-off-by:Filipe Manana <fdmanana@suse.com> Signed-off-by:
David Sterba <dsterba@suse.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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