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Since 2002 (change "Replace BKL for chain locking with sysvfs-private rwlock") the sysv filesystem was doing IO under a rwlock in its get_block() function (yes, a non-sleepable lock hold over a function used to read inode metadata for all reads and writes). Nobody noticed until syzbot in 2023 [1]. This shows nobody is using the filesystem. Just drop it. [1] https://lore.kernel.org/all/0000000000000ccf9a05ee84f5b0@google.com/ Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20250220163940.10155-2-jack@suse.cz Reviewed-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Darrick J. Wong" <djwong@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
129 lines
1.8 KiB
ReStructuredText
129 lines
1.8 KiB
ReStructuredText
.. _filesystems_index:
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===============================
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Filesystems in the Linux kernel
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===============================
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This under-development manual will, some glorious day, provide
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comprehensive information on how the Linux virtual filesystem (VFS) layer
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works, along with the filesystems that sit below it. For now, what we have
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can be found below.
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Core VFS documentation
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======================
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See these manuals for documentation about the VFS layer itself and how its
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algorithms work.
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.. toctree::
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:maxdepth: 2
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vfs
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path-lookup
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api-summary
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splice
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locking
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directory-locking
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devpts
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dnotify
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fiemap
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files
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locks
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multigrain-ts
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mount_api
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quota
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seq_file
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sharedsubtree
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idmappings
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iomap/index
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automount-support
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caching/index
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porting
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Filesystem support layers
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=========================
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Documentation for the support code within the filesystem layer for use in
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filesystem implementations.
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.. toctree::
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:maxdepth: 2
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buffer
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journalling
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fscrypt
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fsverity
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netfs_library
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Filesystems
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===========
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Documentation for filesystem implementations.
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.. toctree::
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:maxdepth: 2
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9p
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adfs
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affs
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afs
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autofs
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autofs-mount-control
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bcachefs/index
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befs
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bfs
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btrfs
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ceph
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coda
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configfs
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cramfs
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dax
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debugfs
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dlmfs
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ecryptfs
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efivarfs
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erofs
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ext2
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ext3
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ext4/index
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f2fs
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gfs2
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gfs2-uevents
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gfs2-glocks
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hfs
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hfsplus
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hpfs
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fuse
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fuse-io
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fuse-io-uring
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inotify
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isofs
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nilfs2
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nfs/index
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ntfs3
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ocfs2
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ocfs2-online-filecheck
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omfs
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orangefs
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overlayfs
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proc
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qnx6
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ramfs-rootfs-initramfs
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relay
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romfs
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smb/index
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spufs/index
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squashfs
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sysfs
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tmpfs
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ubifs
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ubifs-authentication
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udf
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virtiofs
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vfat
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xfs/index
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zonefs
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