Eric Lee / smarc-fsl-linux-kernel

19 Sep, 2020

1 commit

03 Jun, 2020

1 commit

  • d4388340a   fs: convert mpage_readpages to mpage_readahead ... Browse Code »

    Implement the new readahead aop and convert all callers (block_dev,
    exfat, ext2, fat, gfs2, hpfs, isofs, jfs, nilfs2, ocfs2, omfs, qnx6,
    reiserfs & udf).

    The callers are all trivial except for GFS2 & OCFS2.

    Signed-off-by: Matthew Wilcox (Oracle)
    Signed-off-by: Andrew Morton
    Reviewed-by: Junxiao Bi # ocfs2
    Reviewed-by: Joseph Qi # ocfs2
    Reviewed-by: Dave Chinner
    Reviewed-by: John Hubbard
    Reviewed-by: Christoph Hellwig
    Reviewed-by: William Kucharski
    Cc: Chao Yu
    Cc: Cong Wang
    Cc: Darrick J. Wong
    Cc: Eric Biggers
    Cc: Gao Xiang
    Cc: Jaegeuk Kim
    Cc: Michal Hocko
    Cc: Zi Yan
    Cc: Johannes Thumshirn
    Cc: Miklos Szeredi
    Link: http://lkml.kernel.org/r/20200414150233.24495-17-willy@infradead.org
    Signed-off-by: Linus Torvalds

    Matthew Wilcox (Oracle)
     

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
     

21 May, 2019

2 commits

02 May, 2019

1 commit

23 May, 2018

1 commit

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 May, 2016

1 commit

05 Apr, 2016

1 commit

  • 09cbfeaf1   mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros ... Browse Code »

    PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
    ago with promise that one day it will be possible to implement page
    cache with bigger chunks than PAGE_SIZE.

    This promise never materialized. And unlikely will.

    We have many places where PAGE_CACHE_SIZE assumed to be equal to
    PAGE_SIZE. And it's constant source of confusion on whether
    PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
    especially on the border between fs and mm.

    Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
    breakage to be doable.

    Let's stop pretending that pages in page cache are special. They are
    not.

    The changes are pretty straight-forward:

    - << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> ;

    - >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> ;

    - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};

    - page_cache_get() -> get_page();

    - page_cache_release() -> put_page();

    This patch contains automated changes generated with coccinelle using
    script below. For some reason, coccinelle doesn't patch header files.
    I've called spatch for them manually.

    The only adjustment after coccinelle is revert of changes to
    PAGE_CAHCE_ALIGN definition: we are going to drop it later.

    There are few places in the code where coccinelle didn't reach. I'll
    fix them manually in a separate patch. Comments and documentation also
    will be addressed with the separate patch.

    virtual patch

    @@
    expression E;
    @@
    - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
    + E

    @@
    expression E;
    @@
    - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
    + E

    @@
    @@
    - PAGE_CACHE_SHIFT
    + PAGE_SHIFT

    @@
    @@
    - PAGE_CACHE_SIZE
    + PAGE_SIZE

    @@
    @@
    - PAGE_CACHE_MASK
    + PAGE_MASK

    @@
    expression E;
    @@
    - PAGE_CACHE_ALIGN(E)
    + PAGE_ALIGN(E)

    @@
    expression E;
    @@
    - page_cache_get(E)
    + get_page(E)

    @@
    expression E;
    @@
    - page_cache_release(E)
    + put_page(E)

    Signed-off-by: Kirill A. Shutemov
    Acked-by: Michal Hocko
    Signed-off-by: Linus Torvalds

    Kirill A. Shutemov
     

15 Jan, 2016

1 commit

  • 5d097056c   kmemcg: account certain kmem allocations to memcg ... Browse Code »

    Mark those kmem allocations that are known to be easily triggered from
    userspace as __GFP_ACCOUNT/SLAB_ACCOUNT, which makes them accounted to
    memcg. For the list, see below:

    - threadinfo
    - task_struct
    - task_delay_info
    - pid
    - cred
    - mm_struct
    - vm_area_struct and vm_region (nommu)
    - anon_vma and anon_vma_chain
    - signal_struct
    - sighand_struct
    - fs_struct
    - files_struct
    - fdtable and fdtable->full_fds_bits
    - dentry and external_name
    - inode for all filesystems. This is the most tedious part, because
    most filesystems overwrite the alloc_inode method.

    The list is far from complete, so feel free to add more objects.
    Nevertheless, it should be close to "account everything" approach and
    keep most workloads within bounds. Malevolent users will be able to
    breach the limit, but this was possible even with the former "account
    everything" approach (simply because it did not account everything in
    fact).

    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: Vladimir Davydov
    Acked-by: Johannes Weiner
    Acked-by: Michal Hocko
    Cc: Tejun Heo
    Cc: Greg Thelen
    Cc: Christoph Lameter
    Cc: Pekka Enberg
    Cc: David Rientjes
    Cc: Joonsoo Kim
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Vladimir Davydov
     

09 Dec, 2015

1 commit

  • 21fc61c73   don't put symlink bodies in pagecache into highmem ... Browse Code »

    kmap() in page_follow_link_light() needed to go - allowing to hold
    an arbitrary number of kmaps for long is a great way to deadlocking
    the system.

    new helper (inode_nohighmem(inode)) needs to be used for pagecache
    symlinks inodes; done for all in-tree cases. page_follow_link_light()
    instrumented to yell about anything missed.

    Signed-off-by: Al Viro

    Al Viro
     

24 Jun, 2015

1 commit

16 Apr, 2015

1 commit

09 Aug, 2014

3 commits

13 Mar, 2014

1 commit

  • 02b9984d6   fs: push sync_filesystem() down to the file system's remount_fs() ... Browse Code »

    Previously, the no-op "mount -o mount /dev/xxx" operation when the
    file system is already mounted read-write causes an implied,
    unconditional syncfs(). This seems pretty stupid, and it's certainly
    documented or guaraunteed to do this, nor is it particularly useful,
    except in the case where the file system was mounted rw and is getting
    remounted read-only.

    However, it's possible that there might be some file systems that are
    actually depending on this behavior. In most file systems, it's
    probably fine to only call sync_filesystem() when transitioning from
    read-write to read-only, and there are some file systems where this is
    not needed at all (for example, for a pseudo-filesystem or something
    like romfs).

    Signed-off-by: "Theodore Ts'o"
    Cc: linux-fsdevel@vger.kernel.org
    Cc: Christoph Hellwig
    Cc: Artem Bityutskiy
    Cc: Adrian Hunter
    Cc: Evgeniy Dushistov
    Cc: Jan Kara
    Cc: OGAWA Hirofumi
    Cc: Anders Larsen
    Cc: Phillip Lougher
    Cc: Kees Cook
    Cc: Mikulas Patocka
    Cc: Petr Vandrovec
    Cc: xfs@oss.sgi.com
    Cc: linux-btrfs@vger.kernel.org
    Cc: linux-cifs@vger.kernel.org
    Cc: samba-technical@lists.samba.org
    Cc: codalist@coda.cs.cmu.edu
    Cc: linux-ext4@vger.kernel.org
    Cc: linux-f2fs-devel@lists.sourceforge.net
    Cc: fuse-devel@lists.sourceforge.net
    Cc: cluster-devel@redhat.com
    Cc: linux-mtd@lists.infradead.org
    Cc: jfs-discussion@lists.sourceforge.net
    Cc: linux-nfs@vger.kernel.org
    Cc: linux-nilfs@vger.kernel.org
    Cc: linux-ntfs-dev@lists.sourceforge.net
    Cc: ocfs2-devel@oss.oracle.com
    Cc: reiserfs-devel@vger.kernel.org

    Theodore Ts'o
     

29 Jun, 2013

1 commit

01 Jun, 2013

1 commit

04 Mar, 2013

1 commit

  • 7f78e0351   fs: Limit sys_mount to only request filesystem modules. ... Browse Code »

    Modify the request_module to prefix the file system type with "fs-"
    and add aliases to all of the filesystems that can be built as modules
    to match.

    A common practice is to build all of the kernel code and leave code
    that is not commonly needed as modules, with the result that many
    users are exposed to any bug anywhere in the kernel.

    Looking for filesystems with a fs- prefix limits the pool of possible
    modules that can be loaded by mount to just filesystems trivially
    making things safer with no real cost.

    Using aliases means user space can control the policy of which
    filesystem modules are auto-loaded by editing /etc/modprobe.d/*.conf
    with blacklist and alias directives. Allowing simple, safe,
    well understood work-arounds to known problematic software.

    This also addresses a rare but unfortunate problem where the filesystem
    name is not the same as it's module name and module auto-loading
    would not work. While writing this patch I saw a handful of such
    cases. The most significant being autofs that lives in the module
    autofs4.

    This is relevant to user namespaces because we can reach the request
    module in get_fs_type() without having any special permissions, and
    people get uncomfortable when a user specified string (in this case
    the filesystem type) goes all of the way to request_module.

    After having looked at this issue I don't think there is any
    particular reason to perform any filtering or permission checks beyond
    making it clear in the module request that we want a filesystem
    module. The common pattern in the kernel is to call request_module()
    without regards to the users permissions. In general all a filesystem
    module does once loaded is call register_filesystem() and go to sleep.
    Which means there is not much attack surface exposed by loading a
    filesytem module unless the filesystem is mounted. In a user
    namespace filesystems are not mounted unless .fs_flags = FS_USERNS_MOUNT,
    which most filesystems do not set today.

    Acked-by: Serge Hallyn
    Acked-by: Kees Cook
    Reported-by: Kees Cook
    Signed-off-by: "Eric W. Biederman"

    Eric W. Biederman
     

27 Feb, 2013

1 commit

  • d895cb1af   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull vfs pile (part one) from Al Viro:
    "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent
    locking violations, etc.

    The most visible changes here are death of FS_REVAL_DOT (replaced with
    "has ->d_weak_revalidate()") and a new helper getting from struct file
    to inode. Some bits of preparation to xattr method interface changes.

    Misc patches by various people sent this cycle *and* ocfs2 fixes from
    several cycles ago that should've been upstream right then.

    PS: the next vfs pile will be xattr stuff."

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
    saner proc_get_inode() calling conventions
    proc: avoid extra pde_put() in proc_fill_super()
    fs: change return values from -EACCES to -EPERM
    fs/exec.c: make bprm_mm_init() static
    ocfs2/dlm: use GFP_ATOMIC inside a spin_lock
    ocfs2: fix possible use-after-free with AIO
    ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path
    get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
    target: writev() on single-element vector is pointless
    export kernel_write(), convert open-coded instances
    fs: encode_fh: return FILEID_INVALID if invalid fid_type
    kill f_vfsmnt
    vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
    nfsd: handle vfs_getattr errors in acl protocol
    switch vfs_getattr() to struct path
    default SET_PERSONALITY() in linux/elf.h
    ceph: prepopulate inodes only when request is aborted
    d_hash_and_lookup(): export, switch open-coded instances
    9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
    9p: split dropping the acls from v9fs_set_create_acl()
    ...

    Linus Torvalds
     

23 Feb, 2013

1 commit

09 Jan, 2013

1 commit

03 Oct, 2012

2 commits

  • aab174f0d   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull vfs update from Al Viro:

    - big one - consolidation of descriptor-related logics; almost all of
    that is moved to fs/file.c

    (BTW, I'm seriously tempted to rename the result to fd.c. As it is,
    we have a situation when file_table.c is about handling of struct
    file and file.c is about handling of descriptor tables; the reasons
    are historical - file_table.c used to be about a static array of
    struct file we used to have way back).

    A lot of stray ends got cleaned up and converted to saner primitives,
    disgusting mess in android/binder.c is still disgusting, but at least
    doesn't poke so much in descriptor table guts anymore. A bunch of
    relatively minor races got fixed in process, plus an ext4 struct file
    leak.

    - related thing - fget_light() partially unuglified; see fdget() in
    there (and yes, it generates the code as good as we used to have).

    - also related - bits of Cyrill's procfs stuff that got entangled into
    that work; _not_ all of it, just the initial move to fs/proc/fd.c and
    switch of fdinfo to seq_file.

    - Alex's fs/coredump.c spiltoff - the same story, had been easier to
    take that commit than mess with conflicts. The rest is a separate
    pile, this was just a mechanical code movement.

    - a few misc patches all over the place. Not all for this cycle,
    there'll be more (and quite a few currently sit in akpm's tree)."

    Fix up trivial conflicts in the android binder driver, and some fairly
    simple conflicts due to two different changes to the sock_alloc_file()
    interface ("take descriptor handling from sock_alloc_file() to callers"
    vs "net: Providing protocol type via system.sockprotoname xattr of
    /proc/PID/fd entries" adding a dentry name to the socket)

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (72 commits)
    MAX_LFS_FILESIZE should be a loff_t
    compat: fs: Generic compat_sys_sendfile implementation
    fs: push rcu_barrier() from deactivate_locked_super() to filesystems
    btrfs: reada_extent doesn't need kref for refcount
    coredump: move core dump functionality into its own file
    coredump: prevent double-free on an error path in core dumper
    usb/gadget: fix misannotations
    fcntl: fix misannotations
    ceph: don't abuse d_delete() on failure exits
    hypfs: ->d_parent is never NULL or negative
    vfs: delete surplus inode NULL check
    switch simple cases of fget_light to fdget
    new helpers: fdget()/fdput()
    switch o2hb_region_dev_write() to fget_light()
    proc_map_files_readdir(): don't bother with grabbing files
    make get_file() return its argument
    vhost_set_vring(): turn pollstart/pollstop into bool
    switch prctl_set_mm_exe_file() to fget_light()
    switch xfs_find_handle() to fget_light()
    switch xfs_swapext() to fget_light()
    ...

    Linus Torvalds
     
  • 8c0a85377   fs: push rcu_barrier() from deactivate_locked_super() to filesystems ... Browse Code »

    There's no reason to call rcu_barrier() on every
    deactivate_locked_super(). We only need to make sure that all delayed rcu
    free inodes are flushed before we destroy related cache.

    Removing rcu_barrier() from deactivate_locked_super() affects some fast
    paths. E.g. on my machine exit_group() of a last process in IPC
    namespace takes 0.07538s. rcu_barrier() takes 0.05188s of that time.

    Signed-off-by: Kirill A. Shutemov
    Cc: Al Viro
    Signed-off-by: Andrew Morton
    Signed-off-by: Al Viro

    Kirill A. Shutemov
     

21 Sep, 2012

1 commit

14 Jul, 2012

2 commits

21 Mar, 2012

1 commit

  • 5d026c724   fs: initial qnx6fs addition ... Browse Code »

    Adds support for qnx6fs readonly support to the linux kernel.

    * Mount option
    The option mmi_fs can be used to mount Harman Becker/Audi MMI 3G
    HDD qnx6fs filesystems.

    * Documentation
    A high level filesystem stucture description can be found in the
    Documentation/filesystems directory. (qnx6.txt)

    * Additional features
    - Active (stable) superblock selection
    - Superblock checksum check (enforced)
    - Supports mount of qnx6 filesystems with to host different endianess
    - Automatic endianess detection
    - Longfilename support (with non-enfocing crc check)
    - All blocksizes (512, 1024, 2048 and 4096 supported)

    Signed-off-by: Kai Bankett
    Signed-off-by: Al Viro

    Kai Bankett