/*
   * Some non-inline ceph helpers
   */

  #include <linux/module.h>
  #include <linux/ceph/types.h>

  /*
   * return true if @layout appears to be valid
   */
  int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
  {
  	__u32 su = le32_to_cpu(layout->fl_stripe_unit);
  	__u32 sc = le32_to_cpu(layout->fl_stripe_count);
  	__u32 os = le32_to_cpu(layout->fl_object_size);
  
  	/* stripe unit, object size must be non-zero, 64k increment */
  	if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
  		return 0;
  	if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
  		return 0;
  	/* object size must be a multiple of stripe unit */
  	if (os < su || os % su)
  		return 0;
  	/* stripe count must be non-zero */
  	if (!sc)
  		return 0;
  	return 1;
  }

  int ceph_flags_to_mode(int flags)
  {

  	int mode;

  #ifdef O_DIRECTORY  /* fixme */
  	if ((flags & O_DIRECTORY) == O_DIRECTORY)
  		return CEPH_FILE_MODE_PIN;
  #endif

  	switch (flags & O_ACCMODE) {
  	case O_WRONLY:

  		mode = CEPH_FILE_MODE_WR;

  		break;
  	case O_RDONLY:

  		mode = CEPH_FILE_MODE_RD;

  		break;
  	case O_RDWR:
  	case O_ACCMODE: /* this is what the VFS does */
  		mode = CEPH_FILE_MODE_RDWR;
  		break;
  	}

  #ifdef O_LAZY
  	if (flags & O_LAZY)

  		mode |= CEPH_FILE_MODE_LAZY;

  #endif

  	return mode;

  }

  EXPORT_SYMBOL(ceph_flags_to_mode);

  
  int ceph_caps_for_mode(int mode)
  {

  	int caps = CEPH_CAP_PIN;
  
  	if (mode & CEPH_FILE_MODE_RD)
  		caps |= CEPH_CAP_FILE_SHARED |

  			CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;

  	if (mode & CEPH_FILE_MODE_WR)
  		caps |= CEPH_CAP_FILE_EXCL |

  			CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
  			CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
  			CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;

  	if (mode & CEPH_FILE_MODE_LAZY)
  		caps |= CEPH_CAP_FILE_LAZYIO;
  
  	return caps;

  }

  EXPORT_SYMBOL(ceph_caps_for_mode);