Eric Lee / smarc-fsl-linux-kernel

11 Oct, 2016

1 commit

  • 101105b17   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull more vfs updates from Al Viro:
    ">rename2() work from Miklos + current_time() from Deepa"

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
    fs: Replace current_fs_time() with current_time()
    fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps
    fs: Replace CURRENT_TIME with current_time() for inode timestamps
    fs: proc: Delete inode time initializations in proc_alloc_inode()
    vfs: Add current_time() api
    vfs: add note about i_op->rename changes to porting
    fs: rename "rename2" i_op to "rename"
    vfs: remove unused i_op->rename
    fs: make remaining filesystems use .rename2
    libfs: support RENAME_NOREPLACE in simple_rename()
    fs: support RENAME_NOREPLACE for local filesystems
    ncpfs: fix unused variable warning

    Linus Torvalds
     

28 Sep, 2016

1 commit

  • 078cd8279   fs: Replace CURRENT_TIME with current_time() for inode timestamps ... Browse Code »

    CURRENT_TIME macro is not appropriate for filesystems as it
    doesn't use the right granularity for filesystem timestamps.
    Use current_time() instead.

    CURRENT_TIME is also not y2038 safe.

    This is also in preparation for the patch that transitions
    vfs timestamps to use 64 bit time and hence make them
    y2038 safe. As part of the effort current_time() will be
    extended to do range checks. Hence, it is necessary for all
    file system timestamps to use current_time(). Also,
    current_time() will be transitioned along with vfs to be
    y2038 safe.

    Note that whenever a single call to current_time() is used
    to change timestamps in different inodes, it is because they
    share the same time granularity.

    Signed-off-by: Deepa Dinamani
    Reviewed-by: Arnd Bergmann
    Acked-by: Felipe Balbi
    Acked-by: Steven Whitehouse
    Acked-by: Ryusuke Konishi
    Acked-by: David Sterba
    Signed-off-by: Al Viro

    Deepa Dinamani
     

23 Sep, 2016

3 commits

  • 213b067ce   nsfs: Simplify __ns_get_path ... Browse Code »

    Move mntget from the very beginning of __ns_get_path to
    the success path of __ns_get_path, and remove the mntget
    calls.

    This removes the possibility that there will be a mntget/mntput
    pair of __ns_get_path has to retry, and generally simplifies the code.

    Signed-off-by: "Eric W. Biederman"

    Eric W. Biederman
     
  • a7306ed8d   nsfs: add ioctl to get a parent namespace ... Browse Code »

    Pid and user namepaces are hierarchical. There is no way to discover
    parent-child relationships.

    In a future we will use this interface to dump and restore nested
    namespaces.

    Acked-by: Serge Hallyn
    Signed-off-by: Andrei Vagin
    Signed-off-by: Eric W. Biederman

    Andrey Vagin
     
  • 6786741db   nsfs: add ioctl to get an owning user namespace for ns file descriptor ... Browse Code »

    Each namespace has an owning user namespace and now there is not way
    to discover these relationships.

    Understending namespaces relationships allows to answer the question:
    what capability does process X have to perform operations on a resource
    governed by namespace Y?

    After a long discussion, Eric W. Biederman proposed to use ioctl-s for
    this purpose.

    The NS_GET_USERNS ioctl returns a file descriptor to an owning user
    namespace.
    It returns EPERM if a target namespace is outside of a current user
    namespace.

    v2: rename parent to relative

    v3: Add a missing mntput when returning -EAGAIN --EWB

    Acked-by: Serge Hallyn
    Link: https://lkml.org/lkml/2016/7/6/158
    Signed-off-by: Andrei Vagin
    Signed-off-by: Eric W. Biederman

    Andrey Vagin
     

12 Sep, 2015

1 commit

  • 6798a8caa   fs/seq_file: convert int seq_vprint/seq_printf/etc... returns to void ... Browse Code »

    The seq_ function return values were frequently misused.

    See: commit 1f33c41c03da ("seq_file: Rename seq_overflow() to
    seq_has_overflowed() and make public")

    All uses of these return values have been removed, so convert the
    return types to void.

    Miscellanea:

    o Move seq_put_decimal_ and seq_escape prototypes closer the
    other seq_vprintf prototypes
    o Reorder seq_putc and seq_puts to return early on overflow
    o Add argument names to seq_vprintf and seq_printf
    o Update the seq_escape kernel-doc
    o Convert a couple of leading spaces to tabs in seq_escape

    Signed-off-by: Joe Perches
    Cc: Al Viro
    Cc: Steven Rostedt
    Cc: Mark Brown
    Cc: Stephen Rothwell
    Cc: Joerg Roedel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Joe Perches
     

12 Jul, 2015

1 commit

16 Apr, 2015

1 commit

11 Dec, 2014

1 commit

  • e149ed2b8   take the targets of /proc/*/ns/* symlinks to separate fs ... Browse Code »

    New pseudo-filesystem: nsfs. Targets of /proc/*/ns/* live there now.
    It's not mountable (not even registered, so it's not in /proc/filesystems,
    etc.). Files on it *are* bindable - we explicitly permit that in do_loopback().

    This stuff lives in fs/nsfs.c now; proc_ns_fget() moved there as well.
    get_proc_ns() is a macro now (it's simply returning ->i_private; would
    have been an inline, if not for header ordering headache).
    proc_ns_inode() is an ex-parrot. The interface used in procfs is
    ns_get_path(path, task, ops) and ns_get_name(buf, size, task, ops).

    Dentries and inodes are never hashed; a non-counting reference to dentry
    is stashed in ns_common (removed by ->d_prune()) and reused by ns_get_path()
    if present. See ns_get_path()/ns_prune_dentry/nsfs_evict() for details
    of that mechanism.

    As the result, proc_ns_follow_link() has stopped poking in nd->path.mnt;
    it does nd_jump_link() on a consistent pair it gets
    from ns_get_path().

    Signed-off-by: Al Viro

    Al Viro