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Pull fuse fixes from Miklos Szeredi:
- Fix a regression introduced in v5.1 that triggers WARNINGs for some
fuse filesystems
- Fix an xfstest failure
- Allow overlayfs to be used on top of fuse/virtiofs
- Code and documentation cleanups
* tag 'fuse-fixes-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: use true,false for bool variable
Documentation: filesystems: convert fuse to RST
fuse: Support RENAME_WHITEOUT flag
fuse: don't overflow LLONG_MAX with end offset
fix up iter on short count in fuse_direct_io()
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Converts fuse.txt to reStructuredText format, improving the presentation
without changing much of the underlying content.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
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While the document is there, it is currently missing at the
index file.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/3b8e7783b1fcc71e4f94af5ea8e5fa264392f8c4.1580193653.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Converts vfat.txt to the reStructuredText format, improving presentation
without changing the underlying content.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
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Changes in v3:
Removed unnecessary markup.
Removed section "BUG REPORTS" as recommended by the maintainer.
Changes in v2:
Refactored long lines as pointed out by Jonathan
Copied the maintainer
Updated the reference in the MAINTAINERS file for vfat
I did not move this into admin-guide, waiting on what the
maintainer has to say about this and also about old sections
in the text, if any.
Link: https://lore.kernel.org/r/20191223010030.434902-1-dwlsalmeida@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Convert autofs.txt to reST.
The following changes abound:
- Introduce reST formatting for headings, lists et al.
- Add an indentation of an 8 space tab wherever suitable, so as
to maintain consistency.
- Remove indentation of the description of the ioctls which are similar
to the AUTOFS_IOC ioctls, as it does not come out quite right in HTML.
- Add an entry for autofs in the index.
Signed-off-by: Jaskaran Singh <jaskaransingh7654321@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Pull fuse virtio-fs support from Miklos Szeredi:
"Virtio-fs allows exporting directory trees on the host and mounting
them in guest(s).
This isn't actually a new filesystem, but a glue layer between the
fuse filesystem and a virtio based back-end.
It's similar in functionality to the existing virtio-9p solution, but
significantly faster in benchmarks and has better POSIX compliance.
Further permformance improvements can be achieved by sharing the page
cache between host and guest, allowing for faster I/O and reduced
memory use.
Kata Containers have been including the out-of-tree virtio-fs (with
the shared page cache patches as well) since version 1.7 as an
experimental feature. They have been active in development and plan to
switch from virtio-9p to virtio-fs as their default solution. There
has been interest from other sources as well.
The userspace infrastructure is slated to be merged into qemu once the
kernel part hits mainline.
This was developed by Vivek Goyal, Dave Gilbert and Stefan Hajnoczi"
* tag 'virtio-fs-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
virtio-fs: add virtiofs filesystem
virtio-fs: add Documentation/filesystems/virtiofs.rst
fuse: reserve values for mapping protocol
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Pull fs-verity support from Eric Biggers:
"fs-verity is a filesystem feature that provides Merkle tree based
hashing (similar to dm-verity) for individual readonly files, mainly
for the purpose of efficient authenticity verification.
This pull request includes:
(a) The fs/verity/ support layer and documentation.
(b) fs-verity support for ext4 and f2fs.
Compared to the original fs-verity patchset from last year, the UAPI
to enable fs-verity on a file has been greatly simplified. Lots of
other things were cleaned up too.
fs-verity is planned to be used by two different projects on Android;
most of the userspace code is in place already. Another userspace tool
("fsverity-utils"), and xfstests, are also available. e2fsprogs and
f2fs-tools already have fs-verity support. Other people have shown
interest in using fs-verity too.
I've tested this on ext4 and f2fs with xfstests, both the existing
tests and the new fs-verity tests. This has also been in linux-next
since July 30 with no reported issues except a couple minor ones I
found myself and folded in fixes for.
Ted and I will be co-maintaining fs-verity"
* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
f2fs: add fs-verity support
ext4: update on-disk format documentation for fs-verity
ext4: add fs-verity read support
ext4: add basic fs-verity support
fs-verity: support builtin file signatures
fs-verity: add SHA-512 support
fs-verity: implement FS_IOC_MEASURE_VERITY ioctl
fs-verity: implement FS_IOC_ENABLE_VERITY ioctl
fs-verity: add data verification hooks for ->readpages()
fs-verity: add the hook for file ->setattr()
fs-verity: add the hook for file ->open()
fs-verity: add inode and superblock fields
fs-verity: add Kconfig and the helper functions for hashing
fs: uapi: define verity bit for FS_IOC_GETFLAGS
fs-verity: add UAPI header
fs-verity: add MAINTAINERS file entry
fs-verity: add a documentation file
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Add information about the new "virtiofs" file system.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
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This file has its own proper style, except that, after a while,
the coding style gets violated and whitespaces are placed on
different ways.
As Sphinx and ReST are very sentitive to whitespace differences,
I had to opt if each entry after required/mandatory/... fields
should start with zero spaces or with a tab. I opted to start them
all from the zero position, in order to avoid needing to break lines
with more than 80 columns, with would make harder for review.
Most of the other changes at porting.rst were made to use an unified
notation with works nice as a text file while also produce a good html
output after being parsed.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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There are 3 remaining files without an extension inside the fs docs
dir.
Manually convert them to ReST.
In the case of the nfs/exporting.rst file, as the nfs docs
aren't ported yet, I opted to convert and add a :orphan: there,
with should be removed when it gets added into a nfs-specific
part of the fs documentation.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Add a documentation file for fs-verity, covering:
- Introduction
- Use cases
- User API
- FS_IOC_ENABLE_VERITY
- FS_IOC_MEASURE_VERITY
- FS_IOC_GETFLAGS
- Accessing verity files
- File measurement computation
- Merkle tree
- fs-verity descriptor
- Built-in signature verification
- Filesystem support
- ext4
- f2fs
- Implementation details
- Verifying data
- Pagecache
- Block device based filesystems
- Userspace utility
- Tests
- FAQ
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
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The documentation is more appropriate for the administrator than for
the internal kernel API section it is currently in.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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There's no need to use a .rst on Sphinx toc tables. As most of
the Documentation don't use, remove the remaing occurrences.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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vfs.txt is currently stale. If we convert it to RST this is a good
first step in the process of getting the VFS documentation up to date.
This patch does the following (all as a single patch so as not to
introduce any new SPHINX build warnings)
- Use '.. code-block:: c' for C code blocks and indent the code blocks.
- Use double backticks for struct member descriptions.
- Fix a couple of build warnings by guarding pointers (*) with double
backticks .e.g ``*ptr``.
- Add vfs to Documentation/filesystems/index.rst
The member descriptions paragraph indentation was not touched. It is
not pretty but these do not cause build warnings. These descriptions
all need updating anyways so leave it as it is for now.
Signed-off-by: Tobin C. Harding <tobin@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Documentation/filesystems is, like much of the rest of the kernel's
documentation, a jumble of unorganized information. Split the
documentation into categories and try to bring some order to the top-level
index.rst files. No text changes other than a few section-introductory
blurbs; this is all just moving stuff around.
Cc: linux-fsdevel@vger.kernel.org
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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This documents the Android binderfs filesystem used to dynamically add and
remove binder devices that are private to each instance.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
[jc: tweaked markup and added to filesystems/index.rst]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Get rid of some unneeded structural elements around the new (to RST)
pathname-lookup document.
Signed-off-by: NeilBrown <neilb@suse.com>
[ jc: grabbed from email and changelog added ]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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This allows the document to be integrated with the main documentation
tree.
Changes include:
- rename from .md to .rst
- use `` for code, not single `
- use correct sub-section marking
- fix indented blocks, both code and non-code
- fix external-link markup
Signed-off-by: NeilBrown <neilb@suse.com>
[jc: changed the toctree organization a bit]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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People have gone to all the effort of writing kernel-doc for these
functions; the least we can do is put them in the "Other functions"
part of the VFS documentation.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Perhaps long overdue, add a documentation file for filesystem-level
encryption, a.k.a. fscrypt or fs/crypto/, to the Documentation
directory. The new file is based loosely on the latest version of the
"EXT4 Encryption Design Document (public version)" Google Doc, but with
many improvements made, including:
- Reflect the reality that it is not specific to ext4 anymore.
- More thoroughly document the design and user-visible API/behavior.
- Replace outdated information, such as the outdated explanation of how
encrypted filenames are hashed for indexed directories and how
encrypted filenames are presented to userspace without the key.
(This was changed just before release.)
For now the focus is on the design and user-visible API/behavior, not on
how to add encryption support to a filesystem --- since the internal API
is still pretty messy and any standalone documentation for it would
become outdated as things get refactored over time.
Reviewed-by: Michael Halcrow <mhalcrow@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Those functions are currently ignored, causing references at
the documentation to be lost. Don't ignore it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Instead of just mention the function names, use cross-references
to the kernel-doc tags where pertinent.
While not all function documentation is included here, I
double-checked that all functions mentioned there still
exists.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Use pandoc to convert documentation to ReST by calling
Documentation/sphinx/tmplcvt script.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Linus Torvalds
Daniel W. S. Almeida
Mauro Carvalho Chehab
Jaskaran Singh
Stefan Hajnoczi
Mauro Carvalho Chehab
Eric Biggers
Matthew Wilcox (Oracle)
Tobin C. Harding
Jonathan Corbet
Christian Brauner
NeilBrown
Mauro Carvalho Chehab