Commits on May 2, 2018

1. RHEL 7.5 compat: FMODE_KABI_ITERATE …

   As of RHEL 7.5 the mainline fops.iterate() method was added to
   the file_operations structure and is correctly detected by the
   configure script.
   
   Normally this is what we want, but in order to maintain KABI
   compatibility the RHEL change additionally does the following:
   
   * Requires that callers intending to use this extended interface
     set the FMODE_KABI_ITERATE flag on the file structure when
     opening the directory.
   * Adds the fops.iterate() method to the end of the structure,
     without removing fops.readdir().
   
   This change updates the configure check to ignore the RHEL 7.5+
   variant of fops.iterate() when detected.  Instead fallback to
   the fops.readdir() interface which will be available.
   
   Finally, add the 'zpl_' prefix to the directory context wrappers
   to avoid colliding with the kernel provided symbols when both
   the fops.iterate() and fops.readdir() are provided by the kernel.
   
   Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
   Issue openzfs#7460

   

   behlendorf committed May 2, 2018
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