LCOV - code coverage report
Current view: top level - builddir/build/BUILD/blktap-3.37.4/include - cbt-util.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 1 1 100.0 %
Date: 2023-06-20 10:41:14 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright (c) 2017, Citrix Systems, Inc.
       3                 :            :  *
       4                 :            :  * All rights reserved.
       5                 :            :  *
       6                 :            :  * Redistribution and use in source and binary forms, with or without
       7                 :            :  * modification, are permitted provided that the following conditions are met:
       8                 :            :  * 
       9                 :            :  *  1. Redistributions of source code must retain the above copyright
      10                 :            :  *     notice, this list of conditions and the following disclaimer.
      11                 :            :  *  2. Redistributions in binary form must reproduce the above copyright
      12                 :            :  *     notice, this list of conditions and the following disclaimer in the
      13                 :            :  *     documentation and/or other materials provided with the distribution.
      14                 :            :  *  3. Neither the name of the copyright holder nor the names of its 
      15                 :            :  *     contributors may be used to endorse or promote products derived from 
      16                 :            :  *     this software without specific prior written permission.
      17                 :            :  *
      18                 :            :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      19                 :            :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      20                 :            :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      21                 :            :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
      22                 :            :  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
      23                 :            :  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
      24                 :            :  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
      25                 :            :  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
      26                 :            :  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
      27                 :            :  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
      28                 :            :  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      29                 :            :  */
      30                 :            : 
      31                 :            : #ifndef _CBT_UTIL_H_
      32                 :            : #define _CBT_UTIL_H_
      33                 :            : 
      34                 :            : #include <uuid/uuid.h>
      35                 :            : #include "../drivers/tapdisk-log.h"
      36                 :            : 
      37                 :            : #define CBT_BLOCK_SIZE (64 * 1024)
      38                 :            : 
      39                 :            : struct cbt_log_metadata {
      40                 :            :         uuid_t          parent;
      41                 :            :         uuid_t          child;
      42                 :            :         int                     consistent;
      43                 :            :         uint64_t        size;
      44                 :            : };
      45                 :            : 
      46                 :            : struct cbt_log_data {
      47                 :            :         struct cbt_log_metadata metadata;
      48                 :            :         char                                    *bitmap;
      49                 :            : };
      50                 :            : 
      51                 :            : static inline uint64_t
      52                 :            : roundup_div(uint64_t a, int b)
      53                 :            : {
      54                 :            :         return (a + b - 1) / b;
      55                 :            : }
      56                 :            : 
      57                 :            : static inline uint64_t 
      58                 :            : bitmap_size(uint64_t sz)
      59                 :            : {
      60                 :            :         // Original disk size is in bytes
      61                 :         10 :         uint64_t num_blocks = roundup_div(sz, CBT_BLOCK_SIZE);
      62                 :            :         return (roundup_div(num_blocks, 8));
      63                 :            : }
      64                 :            : 
      65                 :            : 
      66                 :            : #endif

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