OpenAFS Master Repository branch, master, updated. openafs-devel-1_5_76-4907-gf21e3ef

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit f21e3ef8ce5093b4e0578d29666f76bd99aef1a2
Author: Mark Vitale <mvitale@sinenomine.net>
Date:   Fri Sep 16 19:01:19 2016 -0400

    Linux 4.9: inode_operation rename now takes flags
    
    In Linux 3.15 commit 520c8b16505236fc82daa352e6c5e73cd9870cff,
    inode_operation rename2() was added.  It takes the same arguments as
    rename(), with an added flags argument supporting the following values:
    
    RENAME_NOREPLACE: if "new" name exists, fail with -EEXIST.  Without
    this flag, the default behavior is to replace the "new" existing file.
    
    RENAME_EXCHANGE: exchange source and target; both must exist.
    
    OpenAFS never implemented a .rename2() routine because it was optional
    when introduced at Linux v3.15.
    
    In Linux 4.9-rc1 the following commits remove the last in-tree uses of
    .rename() and converts .rename2() to .rename().
    aadfa8019e81 vfs: add note about i_op->rename changes to porting
    2773bf00aeb9 fs: rename "rename2" i_op to "rename"
    18fc84dafaac vfs: remove unused i_op->rename
    1cd66c93ba8c fs: make remaining filesystems use .rename2
    e0e0be8a8355 libfs: support RENAME_NOREPLACE in simple_rename()
    f03b8ad8d386 fs: support RENAME_NOREPLACE for local filesystems
    
    With these changes, it is now mandatory for OpenAFS afs_linux_rename()
    to accept a 5th flag argument.
    
    Add an autoconfig test to determine the signature of .rename().  Use this
    information to implement afs_linux_rename() with the appropriate number
    of arguments.  Implement "toleration support" for the flags option by
    treating a zero flag as a normal rename; if any flags are specified,
    return -EINVAL to indicate the OpenAFS filesystem does not yet support
    any flags.
    
    Change-Id: I165d2b7956942446d97beda8504ac1ed5185a036
    Reviewed-on: https://gerrit.openafs.org/12391
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>

 acinclude.m4                 |    6 ++++++
 src/afs/LINUX/osi_vnodeops.c |   11 ++++++++++-
 2 files changed, 16 insertions(+), 1 deletions(-)

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