Eric Lee / smarc-fsl-linux-kernel

03 Oct, 2006

1 commit

  • afefdbb28   [PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers ... Browse Code »

    These patches make the kernel pass 64-bit inode numbers internally when
    communicating to userspace, even on a 32-bit system. They are required
    because some filesystems have intrinsic 64-bit inode numbers: NFS3+ and XFS
    for example. The 64-bit inode numbers are then propagated to userspace
    automatically where the arch supports it.

    Problems have been seen with userspace (eg: ld.so) using the 64-bit inode
    number returned by stat64() or getdents64() to differentiate files, and
    failing because the 64-bit inode number space was compressed to 32-bits, and
    so overlaps occur.

    This patch:

    Make filldir_t take a 64-bit inode number and struct kstat carry a 64-bit
    inode number so that 64-bit inode numbers can be passed back to userspace.

    The stat functions then returns the full 64-bit inode number where
    available and where possible. If it is not possible to represent the inode
    number supplied by the filesystem in the field provided by userspace, then
    error EOVERFLOW will be issued.

    Similarly, the getdents/readdir functions now pass the full 64-bit inode
    number to userspace where possible, returning EOVERFLOW instead when a
    directory entry is encountered that can't be properly represented.

    Note that this means that some inodes will not be stat'able on a 32-bit
    system with old libraries where they were before - but it does mean that
    there will be no ambiguity over what a 32-bit inode number refers to.

    Note similarly that directory scans may be cut short with an error on a
    32-bit system with old libraries where the scan would work before for the
    same reasons.

    It is judged unlikely that this situation will occur because modern glibc
    uses 64-bit capable versions of stat and getdents class functions
    exclusively, and that older systems are unlikely to encounter
    unrepresentable inode numbers anyway.

    [akpm: alpha build fix]
    Signed-off-by: David Howells
    Cc: Trond Myklebust
    Cc: Al Viro
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Howells
     

22 May, 2006

1 commit

  • 8c7b389e5   [PATCH] NFS server subtree_check returns dubious value ... Browse Code »

    Address a problem found when a Linux NFS server uses the "subtree_check"
    export option.

    The "subtree_check" NFS export option was designed to prohibit a client
    from using a file handle for which it should not have permission. The
    algorithm used is to ensure that the entire path to the file being
    referenced is accessible to the user attempting to use the file handle. If
    some part of the path is not accessible, then the operation is aborted and
    the appropriate version of ESTALE is returned to the NFS client.

    The error, ESTALE, is unfortunate in that it causes NFS clients to make
    certain assumptions about the continued existence of the file. They assume
    that the file no longer exists and refuse to attempt to access it again.
    In this case, the file really does exist, but access was denied by the
    server for a particular user.

    A better error to return would be an EACCES sort of error. This would
    inform the client that the particular operation that it was attempting was
    not allowed, without the nasty side effects of the ESTALE error.

    Signed-off-by: Peter Staubach
    Acked-By: NeilBrown
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Peter Staubach
     

19 Jan, 2006

1 commit

  • e2f99018e   [PATCH] exportfs: add find_acceptable_alias helper ... Browse Code »

    find_exported_dentry contains two duplicate loops to find an alias that the
    acceptable callback likes. Split this out to a new helper and switch from
    list_for_each to list_for_each_entry to make it more readable.

    Signed-off-by: Christoph Hellwig
    Acked-by: NeilBrown
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     

10 Jan, 2006

1 commit

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds