Eric Lee / smarc-fsl-linux-kernel

29 Oct, 2020

1 commit

25 Oct, 2020

1 commit

  • 0eac1102e   Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull misc vfs updates from Al Viro:
    "Assorted stuff all over the place (the largest group here is
    Christoph's stat cleanups)"

    * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
    fs: remove KSTAT_QUERY_FLAGS
    fs: remove vfs_stat_set_lookup_flags
    fs: move vfs_fstatat out of line
    fs: implement vfs_stat and vfs_lstat in terms of vfs_fstatat
    fs: remove vfs_statx_fd
    fs: omfs: use kmemdup() rather than kmalloc+memcpy
    [PATCH] reduce boilerplate in fsid handling
    fs: Remove duplicated flag O_NDELAY occurring twice in VALID_OPEN_FLAGS
    selftests: mount: add nosymfollow tests
    Add a "nosymfollow" mount option.

    Linus Torvalds
     

19 Sep, 2020

1 commit

24 Aug, 2020

1 commit

22 Aug, 2020

1 commit

  • f26044c83   squashfs: avoid bio_alloc() failure with 1Mbyte blocks ... Browse Code »

    This is a regression introduced by the patch "migrate from ll_rw_block
    usage to BIO".

    Bio_alloc() is limited to 256 pages (1 Mbyte). This can cause a failure
    when reading 1 Mbyte block filesystems. The problem is a datablock can be
    fully (or almost uncompressed), requiring 256 pages, but, because blocks
    are not aligned to page boundaries, it may require 257 pages to read.

    Bio_kmalloc() can handle 1024 pages, and so use this for the edge
    condition.

    Fixes: 93e72b3c612a ("squashfs: migrate from ll_rw_block usage to BIO")
    Reported-by: Nicolas Prochazka
    Reported-by: Tomoatsu Shimada
    Signed-off-by: Phillip Lougher
    Signed-off-by: Andrew Morton
    Reviewed-by: Guenter Roeck
    Cc: Philippe Liard
    Cc: Christoph Hellwig
    Cc: Adrien Schildknecht
    Cc: Daniel Rosenberg
    Cc:
    Link: http://lkml.kernel.org/r/20200815035637.15319-1-phillip@squashfs.org.uk
    Signed-off-by: Linus Torvalds

    Phillip Lougher
     

25 Jul, 2020

2 commits

  • 183e8b83c   Merge branch 'upstream-master' into android-mainline ... Browse Code »

    Partial 5.8-rc7 merge to make the final merge easier.

    Signed-off-by: Greg Kroah-Hartman
    Change-Id: I95f1b0a379e3810333300a70c5a93f449d945c54

    Greg Kroah-Hartman
     
  • 2910c59fd   squashfs: fix length field overlap check in metadata reading ... Browse Code »

    This is a regression introduced by the "migrate from ll_rw_block usage
    to BIO" patch.

    Squashfs packs structures on byte boundaries, and due to that the length
    field (of the metadata block) may not be fully in the current block.
    The new code rewrote and introduced a faulty check for that edge case.

    Fixes: 93e72b3c612adcaca1 ("squashfs: migrate from ll_rw_block usage to BIO")
    Reported-by: Bernd Amend
    Signed-off-by: Phillip Lougher
    Signed-off-by: Andrew Morton
    Cc: Christoph Hellwig
    Cc: Adrien Schildknecht
    Cc: Guenter Roeck
    Cc: Daniel Rosenberg
    Link: http://lkml.kernel.org/r/20200717195536.16069-1-phillip@squashfs.org.uk
    Signed-off-by: Linus Torvalds

    Phillip Lougher
     

27 Jun, 2020

1 commit

16 Jun, 2020

1 commit

  • b2b32e3aa   Squashfs: Replace zero-length array with flexible-array ... Browse Code »

    There is a regular need in the kernel to provide a way to declare having a
    dynamically sized set of trailing elements in a structure. Kernel code should
    always use “flexible array members”[1] for these cases. The older style of
    one-element or zero-length arrays should no longer be used[2].

    [1] https://en.wikipedia.org/wiki/Flexible_array_member
    [2] https://github.com/KSPP/linux/issues/21

    Signed-off-by: Gustavo A. R. Silva

    Gustavo A. R. Silva
     

12 Jun, 2020

1 commit

07 Jun, 2020

1 commit

03 Jun, 2020

2 commits

  • 94709049f   Merge branch 'akpm' (patches from Andrew) ... Browse Code »

    Merge updates from Andrew Morton:
    "A few little subsystems and a start of a lot of MM patches.

    Subsystems affected by this patch series: squashfs, ocfs2, parisc,
    vfs. With mm subsystems: slab-generic, slub, debug, pagecache, gup,
    swap, memcg, pagemap, memory-failure, vmalloc, kasan"

    * emailed patches from Andrew Morton : (128 commits)
    kasan: move kasan_report() into report.c
    mm/mm_init.c: report kasan-tag information stored in page->flags
    ubsan: entirely disable alignment checks under UBSAN_TRAP
    kasan: fix clang compilation warning due to stack protector
    x86/mm: remove vmalloc faulting
    mm: remove vmalloc_sync_(un)mappings()
    x86/mm/32: implement arch_sync_kernel_mappings()
    x86/mm/64: implement arch_sync_kernel_mappings()
    mm/ioremap: track which page-table levels were modified
    mm/vmalloc: track which page-table levels were modified
    mm: add functions to track page directory modifications
    s390: use __vmalloc_node in stack_alloc
    powerpc: use __vmalloc_node in alloc_vm_stack
    arm64: use __vmalloc_node in arch_alloc_vmap_stack
    mm: remove vmalloc_user_node_flags
    mm: switch the test_vmalloc module to use __vmalloc_node
    mm: remove __vmalloc_node_flags_caller
    mm: remove both instances of __vmalloc_node_flags
    mm: remove the prot argument to __vmalloc_node
    mm: remove the pgprot argument to __vmalloc
    ...

    Linus Torvalds
     
  • 93e72b3c6   squashfs: migrate from ll_rw_block usage to BIO ... Browse Code »

    ll_rw_block() function has been deprecated in favor of BIO which appears
    to come with large performance improvements.

    This patch decreases boot time by close to 40% when using squashfs for
    the root file-system. This is observed at least in the context of
    starting an Android VM on Chrome OS using crosvm. The patch was tested
    on 4.19 as well as master.

    This patch is largely based on Adrien Schildknecht's patch that was
    originally sent as https://lkml.org/lkml/2017/9/22/814 though with some
    significant changes and simplifications while also taking Phillip
    Lougher's feedback into account, around preserving support for
    FILE_CACHE in particular.

    [akpm@linux-foundation.org: fix build error reported by Randy]
    Link: http://lkml.kernel.org/r/319997c2-5fc8-f889-2ea3-d913308a7c1f@infradead.org
    Signed-off-by: Philippe Liard
    Signed-off-by: Andrew Morton
    Reviewed-by: Christoph Hellwig
    Cc: Adrien Schildknecht
    Cc: Phillip Lougher
    Cc: Guenter Roeck
    Cc: Daniel Rosenberg
    Link: https://chromium.googlesource.com/chromiumos/platform/crosvm
    Link: http://lkml.kernel.org/r/20191106074238.186023-1-pliard@google.com
    Signed-off-by: Linus Torvalds

    Philippe Liard
     

28 May, 2020

1 commit

  • fd56200a1   squashfs: Make use of local lock in multi_cpu decompressor ... Browse Code »

    The squashfs multi CPU decompressor makes use of get_cpu_ptr() to
    acquire a pointer to per-CPU data. get_cpu_ptr() implicitly disables
    preemption which serializes the access to the per-CPU data.

    But decompression can take quite some time depending on the size. The
    observed preempt disabled times in real world scenarios went up to 8ms,
    causing massive wakeup latencies. This happens on all CPUs as the
    decompression is fully parallelized.

    Replace the implicit preemption control with an explicit local lock.
    This allows RT kernels to substitute it with a real per CPU lock, which
    serializes the access but keeps the code section preemptible. On non RT
    kernels this maps to preempt_disable() as before, i.e. no functional
    change.

    [ bigeasy: Use local_lock(), patch description]

    Reported-by: Alexander Stein
    Signed-off-by: Julia Cartwright
    Signed-off-by: Sebastian Andrzej Siewior
    Signed-off-by: Ingo Molnar
    Tested-by: Alexander Stein
    Acked-by: Peter Zijlstra
    Link: https://lore.kernel.org/r/20200527201119.1692513-5-bigeasy@linutronix.de

    Julia Cartwright
     

06 Nov, 2019

1 commit

  • 3484eba91   FROMLIST: Add flags option to get xattr method paired to __vfs_getxattr ... Browse Code »

    Add a flag option to get xattr method that could have a bit flag of
    XATTR_NOSECURITY passed to it. XATTR_NOSECURITY is generally then
    set in the __vfs_getxattr path when called by security
    infrastructure.

    This handles the case of a union filesystem driver that is being
    requested by the security layer to report back the xattr data.

    For the use case where access is to be blocked by the security layer.

    The path then could be security(dentry) ->
    __vfs_getxattr(dentry...XATTR_NOSECURITY) ->
    handler->get(dentry...XATTR_NOSECURITY) ->
    __vfs_getxattr(lower_dentry...XATTR_NOSECURITY) ->
    lower_handler->get(lower_dentry...XATTR_NOSECURITY)
    which would report back through the chain data and success as
    expected, the logging security layer at the top would have the
    data to determine the access permissions and report back the target
    context that was blocked.

    Without the get handler flag, the path on a union filesystem would be
    the errant security(dentry) -> __vfs_getxattr(dentry) ->
    handler->get(dentry) -> vfs_getxattr(lower_dentry) -> nested ->
    security(lower_dentry, log off) -> lower_handler->get(lower_dentry)
    which would report back through the chain no data, and -EACCES.

    For selinux for both cases, this would translate to a correctly
    determined blocked access. In the first case with this change a correct avc
    log would be reported, in the second legacy case an incorrect avc log
    would be reported against an uninitialized u:object_r:unlabeled:s0
    context making the logs cosmetically useless for audit2allow.

    This patch series is inert and is the wide-spread addition of the
    flags option for xattr functions, and a replacement of __vfs_getxattr
    with __vfs_getxattr(...XATTR_NOSECURITY).

    Signed-off-by: Mark Salyzyn
    Reviewed-by: Jan Kara
    Acked-by: Jan Kara
    Acked-by: Jeff Layton
    Acked-by: David Sterba
    Acked-by: Darrick J. Wong
    Acked-by: Mike Marshall
    Cc: Stephen Smalley
    Cc: linux-kernel@vger.kernel.org
    Cc: kernel-team@android.com
    Cc: linux-security-module@vger.kernel.org

    (cherry picked from (rejected from archive because of too many recipients))
    Signed-off-by: Mark Salyzyn
    Bug: 133515582
    Bug: 136124883
    Bug: 129319403
    Change-Id: Iabbb8771939d5f66667a26bb23ddf4c562c349a1

    Mark Salyzyn
     

20 Sep, 2019

1 commit

  • bc7d9aee3   Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull misc mount API conversions from Al Viro:
    "Conversions to new API for shmem and friends and for mount_mtd()-using
    filesystems.

    As for the rest of the mount API conversions in -next, some of them
    belong in the individual trees (e.g. binderfs one should definitely go
    through android folks, after getting redone on top of their changes).
    I'm going to drop those and send the rest (trivial ones + stuff ACKed
    by maintainers) in a separate series - by that point they are
    independent from each other.

    Some stuff has already migrated into individual trees (NFS conversion,
    for example, or FUSE stuff, etc.); those presumably will go through
    the regular merges from corresponding trees."

    * 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
    vfs: Make fs_parse() handle fs_param_is_fd-type params better
    vfs: Convert ramfs, shmem, tmpfs, devtmpfs, rootfs to use the new mount API
    shmem_parse_one(): switch to use of fs_parse()
    shmem_parse_options(): take handling a single option into a helper
    shmem_parse_options(): don't bother with mpol in separate variable
    shmem_parse_options(): use a separate structure to keep the results
    make shmem_fill_super() static
    make ramfs_fill_super() static
    devtmpfs: don't mix {ramfs,shmem}_fill_super() with mount_single()
    vfs: Convert squashfs to use the new mount API
    mtd: Kill mount_mtd()
    vfs: Convert jffs2 to use the new mount API
    vfs: Convert cramfs to use the new mount API
    vfs: Convert romfs to use the new mount API
    vfs: Add a single-or-reconfig keying to vfs_get_super()

    Linus Torvalds
     

06 Sep, 2019

1 commit

  • 5a2be1288   vfs: Convert squashfs to use the new mount API ... Browse Code »

    Convert the squashfs filesystem to the new internal mount API as the old
    one will be obsoleted and removed. This allows greater flexibility in
    communication of mount parameters between userspace, the VFS and the
    filesystem.

    See Documentation/filesystems/mount_api.txt for more information.

    Signed-off-by: David Howells
    cc: Phillip Lougher
    cc: squashfs-devel@lists.sourceforge.net
    Signed-off-by: Al Viro

    David Howells
     

30 Aug, 2019

1 commit

  • 22b139691   fs: Fill in max and min timestamps in superblock ... Browse Code »

    Fill in the appropriate limits to avoid inconsistencies
    in the vfs cached inode times when timestamps are
    outside the permitted range.

    Even though some filesystems are read-only, fill in the
    timestamps to reflect the on-disk representation.

    Signed-off-by: Deepa Dinamani
    Reviewed-by: Darrick J. Wong
    Acked-By: Tigran Aivazian
    Acked-by: Jeff Layton
    Cc: aivazian.tigran@gmail.com
    Cc: al@alarsen.net
    Cc: coda@cs.cmu.edu
    Cc: darrick.wong@oracle.com
    Cc: dushistov@mail.ru
    Cc: dwmw2@infradead.org
    Cc: hch@infradead.org
    Cc: jack@suse.com
    Cc: jaharkes@cs.cmu.edu
    Cc: luisbg@kernel.org
    Cc: nico@fluxnic.net
    Cc: phillip@squashfs.org.uk
    Cc: richard@nod.at
    Cc: salah.triki@gmail.com
    Cc: shaggy@kernel.org
    Cc: linux-xfs@vger.kernel.org
    Cc: codalist@coda.cs.cmu.edu
    Cc: linux-ext4@vger.kernel.org
    Cc: linux-mtd@lists.infradead.org
    Cc: jfs-discussion@lists.sourceforge.net
    Cc: reiserfs-devel@vger.kernel.org

    Deepa Dinamani
     

19 Jun, 2019

1 commit

  • 20c8ccb19   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 ... Browse Code »

    Based on 1 normalized pattern(s):

    this work is licensed under the terms of the gnu gpl version 2 see
    the copying file in the top level directory

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-only

    has been chosen to replace the boilerplate/reference in 35 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Kate Stewart
    Reviewed-by: Enrico Weigelt
    Reviewed-by: Allison Randal
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190604081206.797835076@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     

24 May, 2019

2 commits

  • 3e0a4e858   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 ... Browse Code »

    Based on 1 normalized pattern(s):

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license as published by
    the free software foundation either version 2 or at your option any
    later version this program is distributed in the hope that it will
    be useful but without any warranty without even the implied warranty
    of merchantability or fitness for a particular purpose see the gnu
    general public license for more details

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-or-later

    has been chosen to replace the boilerplate/reference in 44 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Richard Fontana
    Reviewed-by: Allison Randal
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190523091651.032047323@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     
  • 68252eb5f   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 35 ... Browse Code »

    Based on 1 normalized pattern(s):

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license as published by
    the free software foundation either version 2 or at your option any
    later version this program is distributed in the hope that it will
    be useful but without any warranty without even the implied warranty
    of merchantability or fitness for a particular purpose see the gnu
    general public license for more details you should have received a
    copy of the gnu general public license along with this program if
    not write to the free software foundation 51 franklin street fifth
    floor boston ma 02110 1301 usa

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-or-later

    has been chosen to replace the boilerplate/reference in 23 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Allison Randal
    Reviewed-by: Kate Stewart
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190520170857.458548087@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     

21 May, 2019

1 commit

02 May, 2019

1 commit

03 Aug, 2018

2 commits

  • a3f94cb99   Squashfs: Compute expected length from inode size rather than block length ... Browse Code »

    Previously in squashfs_readpage() when copying data into the page
    cache, it used the length of the datablock read from the filesystem
    (after decompression). However, if the filesystem has been corrupted
    this data block may be short, which will leave pages unfilled.

    The fix for this is to compute the expected number of bytes to copy
    from the inode size, and use this to detect if the block is short.

    Signed-off-by: Phillip Lougher
    Tested-by: Willy Tarreau
    Cc: Анатолий Тросиненко
    Signed-off-by: Linus Torvalds

    Phillip Lougher
     
  • 71755ee53   squashfs: more metadata hardening ... Browse Code »

    The squashfs fragment reading code doesn't actually verify that the
    fragment is inside the fragment table. The end result _is_ verified to
    be inside the image when actually reading the fragment data, but before
    that is done, we may end up taking a page fault because the fragment
    table itself might not even exist.

    Another report from Anatoly and his endless squashfs image fuzzing.

    Reported-by: Анатолий Тросиненко
    Acked-by:: Phillip Lougher ,
    Cc: Willy Tarreau
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

02 Aug, 2018

1 commit

  • cdbb65c4c   squashfs metadata 2: electric boogaloo ... Browse Code »

    Anatoly continues to find issues with fuzzed squashfs images.

    This time, corrupt, missing, or undersized data for the page filling
    wasn't checked for, because the squashfs_{copy,read}_cache() functions
    did the squashfs_copy_data() call without checking the resulting data
    size.

    Which could result in the page cache pages being incompletely filled in,
    and no error indication to the user space reading garbage data.

    So make a helper function for the "fill in pages" case, because the
    exact same incomplete sequence existed in two places.

    [ I should have made a squashfs branch for these things, but I didn't
    intend to start doing them in the first place.

    My historical connection through cramfs is why I got into looking at
    these issues at all, and every time I (continue to) think it's a
    one-off.

    Because _this_ time is always the last time. Right? - Linus ]

    Reported-by: Anatoly Trosinenko
    Tested-by: Willy Tarreau
    Cc: Al Viro
    Cc: Phillip Lougher
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

31 Jul, 2018

1 commit

  • d51258478   squashfs: more metadata hardening ... Browse Code »

    Anatoly reports another squashfs fuzzing issue, where the decompression
    parameters themselves are in a compressed block.

    This causes squashfs_read_data() to be called in order to read the
    decompression options before the decompression stream having been set
    up, making squashfs go sideways.

    Reported-by: Anatoly Trosinenko
    Acked-by: Phillip Lougher
    Cc: stable@kernel.org
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

30 Jul, 2018

1 commit

  • 01cfb7937   squashfs: be more careful about metadata corruption ... Browse Code »

    Anatoly Trosinenko reports that a corrupted squashfs image can cause a
    kernel oops. It turns out that squashfs can end up being confused about
    negative fragment lengths.

    The regular squashfs_read_data() does check for negative lengths, but
    squashfs_read_metadata() did not, and the fragment size code just
    blindly trusted the on-disk value. Fix both the fragment parsing and
    the metadata reading code.

    Reported-by: Anatoly Trosinenko
    Cc: Al Viro
    Cc: Phillip Lougher
    Cc: stable@kernel.org
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

28 Nov, 2017

1 commit

  • 1751e8a6c   Rename superblock flags (MS_xyz -> SB_xyz) ... Browse Code »

    This is a pure automated search-and-replace of the internal kernel
    superblock flags.

    The s_flags are now called SB_*, with the names and the values for the
    moment mirroring the MS_* flags that they're equivalent to.

    Note how the MS_xyz flags are the ones passed to the mount system call,
    while the SB_xyz flags are what we then use in sb->s_flags.

    The script to do this was:

    # places to look in; re security/*: it generally should *not* be
    # touched (that stuff parses mount(2) arguments directly), but
    # there are two places where we really deal with superblock flags.
    FILES="drivers/mtd drivers/staging/lustre fs ipc mm \
    include/linux/fs.h include/uapi/linux/bfs_fs.h \
    security/apparmor/apparmorfs.c security/apparmor/include/lib.h"
    # the list of MS_... constants
    SYMS="RDONLY NOSUID NODEV NOEXEC SYNCHRONOUS REMOUNT MANDLOCK \
    DIRSYNC NOATIME NODIRATIME BIND MOVE REC VERBOSE SILENT \
    POSIXACL UNBINDABLE PRIVATE SLAVE SHARED RELATIME KERNMOUNT \
    I_VERSION STRICTATIME LAZYTIME SUBMOUNT NOREMOTELOCK NOSEC BORN \
    ACTIVE NOUSER"

    SED_PROG=
    for i in $SYMS; do SED_PROG="$SED_PROG -e s/MS_$i/SB_$i/g"; done

    # we want files that contain at least one of MS_...,
    # with fs/namespace.c and fs/pnode.c excluded.
    L=$(for i in $SYMS; do git grep -w -l MS_$i $FILES; done| sort|uniq|grep -v '^fs/namespace.c'|grep -v '^fs/pnode.c')

    for f in $L; do sed -i $f $SED_PROG; done

    Requested-by: Al Viro
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

02 Nov, 2017

1 commit

  • b24413180   License cleanup: add SPDX GPL-2.0 license identifier to files with no license ... Browse Code »

    Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

09 Sep, 2017

1 commit

  • 87bf54bb4   squashfs: Add zstd support ... Browse Code »

    Add zstd compression and decompression support to SquashFS. zstd is a
    great fit for SquashFS because it can compress at ratios approaching xz,
    while decompressing twice as fast as zlib. For SquashFS in particular,
    it can decompress as fast as lzo and lz4. It also has the flexibility
    to turn down the compression ratio for faster compression times.

    The compression benchmark is run on the file tree from the SquashFS archive
    found in ubuntu-16.10-desktop-amd64.iso [1]. It uses `mksquashfs` with the
    default block size (128 KB) and and various compression algorithms/levels.
    xz and zstd are also benchmarked with 256 KB blocks. The decompression
    benchmark times how long it takes to `tar` the file tree into `/dev/null`.
    See the benchmark file in the upstream zstd source repository located under
    `contrib/linux-kernel/squashfs-benchmark.sh` [2] for details.

    I ran the benchmarks on a Ubuntu 14.04 VM with 2 cores and 4 GiB of RAM.
    The VM is running on a MacBook Pro with a 3.1 GHz Intel Core i7 processor,
    16 GB of RAM, and a SSD.

    | Method | Ratio | Compression MB/s | Decompression MB/s |
    |----------------|-------|------------------|--------------------|
    | gzip | 2.92 | 15 | 128 |
    | lzo | 2.64 | 9.5 | 217 |
    | lz4 | 2.12 | 94 | 218 |
    | xz | 3.43 | 5.5 | 35 |
    | xz 256 KB | 3.53 | 5.4 | 40 |
    | zstd 1 | 2.71 | 96 | 210 |
    | zstd 5 | 2.93 | 69 | 198 |
    | zstd 10 | 3.01 | 41 | 225 |
    | zstd 15 | 3.13 | 11.4 | 224 |
    | zstd 16 256 KB | 3.24 | 8.1 | 210 |

    This patch was written by Sean Purcell , but I will be
    taking over the submission process.

    [1] http://releases.ubuntu.com/16.10/
    [2] https://github.com/facebook/zstd/blob/dev/contrib/linux-kernel/squashfs-benchmark.sh

    zstd source repository: https://github.com/facebook/zstd

    Signed-off-by: Sean Purcell
    Signed-off-by: Nick Terrell
    Signed-off-by: Chris Mason
    Acked-by: Phillip Lougher

    Sean Purcell
     

25 Feb, 2017

1 commit

  • d21b5ff12   fs/pstore: fs/squashfs: change usage of LZ4 to work with new LZ4 version ... Browse Code »

    Update fs/pstore and fs/squashfs to use the updated functions from the
    new LZ4 module.

    Link: http://lkml.kernel.org/r/1486321748-19085-5-git-send-email-4sschmid@informatik.uni-hamburg.de
    Signed-off-by: Sven Schmidt
    Cc: Bongkyu Kim
    Cc: Rui Salvaterra
    Cc: Sergey Senozhatsky
    Cc: Greg Kroah-Hartman
    Cc: Herbert Xu
    Cc: David S. Miller
    Cc: Anton Vorontsov
    Cc: Colin Cross
    Cc: Kees Cook
    Cc: Tony Luck
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Sven Schmidt
     

18 Dec, 2016

1 commit

  • 231753ef7   Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm… ... Browse Code »

    …/linux/kernel/git/mszeredi/vfs

    Pull partial readlink cleanups from Miklos Szeredi.

    This is the uncontroversial part of the readlink cleanup patch-set that
    simplifies the default readlink handling.

    Miklos and Al are still discussing the rest of the series.

    * git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
    vfs: make generic_readlink() static
    vfs: remove ".readlink = generic_readlink" assignments
    vfs: default to generic_readlink()
    vfs: replace calling i_op->readlink with vfs_readlink()
    proc/self: use generic_readlink
    ecryptfs: use vfs_get_link()
    bad_inode: add missing i_op initializers

    Linus Torvalds
     

09 Dec, 2016

1 commit

01 Nov, 2016

1 commit

08 Oct, 2016

1 commit

08 Jun, 2016

1 commit

09 May, 2016

1 commit

03 May, 2016

1 commit

11 Apr, 2016

1 commit