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fffcdcc31f
It turns out that there are some serious bugs in how xfs handles the unlinked inode lists. Way back before 4.14, there was a bug where a ro mount of a dirty filesystem would recover the log bug neglect to purge the unlinked list. This leads to clean unmounted filesystems with unlinked inodes. Starting around 5.15, we also converted the codebase to maintain a doubly-linked incore unlinked list. However, we never provided the ability to load the incore list from disk. If someone tries to allocate an O_TMPFILE file on a clean fs with a pre-existing unlinked list or even deletes a file, the code will fail and the fs shuts down. This first part of the correction effort adds the ability to load the first inode in the bucket when unlinking a file; and to load the next inode in the list when inactivating (freeing) an inode. This has been lightly tested with fstests. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZQChOQAKCRBKO3ySh0YR plJvAQC0s843w2nvluXlIE8P9nBqk2ht6zwNOJpiZbWnf0zeLAD/a6v0HVVLbGN5 qHVd/abQ5QIW55Ybm3Qko6PKvV4Nlgo= =WcRN -----END PGP SIGNATURE----- Merge tag 'fix-iunlink-6.6_2023-09-12' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.6-fixesA xfs: reload the last iunlink item It turns out that there are some serious bugs in how xfs handles the unlinked inode lists. Way back before 4.14, there was a bug where a ro mount of a dirty filesystem would recover the log bug neglect to purge the unlinked list. This leads to clean unmounted filesystems with unlinked inodes. Starting around 5.15, we also converted the codebase to maintain a doubly-linked incore unlinked list. However, we never provided the ability to load the incore list from disk. If someone tries to allocate an O_TMPFILE file on a clean fs with a pre-existing unlinked list or even deletes a file, the code will fail and the fs shuts down. This first part of the correction effort adds the ability to load the first inode in the bucket when unlinking a file; and to load the next inode in the list when inactivating (freeing) an inode. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'fix-iunlink-6.6_2023-09-12' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: load uncached unlinked inodes into memory on demand |
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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.