nbd-helper.h

   1 #ifndef NBD_HELPER_H
   2 #define NBD_HELPER_H
   3
   4 #include "nbd.h"
   5
   6 /* Constants and macros */
   7
   8 /*
   9  * Constants for nbd_request.magic == NBD_TRACELOG_MAGIC
  10  */
  11 /* 1) stored in nbd_req.type */
  12 enum {
  13         /* enable/disable logging actual data.
  14          * nbd_request.len is the new value (true/false)
  15          */
  16         NBD_TRACELOG_SET_DATALOG = 1
  17 };
  18
  19 /* 2) Must be in nbd_req.from */
  20 #define NBD_TRACELOG_FROM_MAGIC 0x4A93BA39A54F31B6ULL
  21
  22 /* Functions */
  23
  24 /**
  25  * Translate a command name into human readable form
  26  *
  27  * @param command The command number (after applying NBD_CMD_MASK_COMMAND)
  28  * @return pointer to the command name
  29  **/
  30 #define ENUM2STR(x)     case x: return #x
  31 static inline const char * getcommandname(uint32_t command) {
  32         switch (command) {
  33         ENUM2STR(NBD_CMD_READ);
  34         ENUM2STR(NBD_CMD_WRITE);
  35         ENUM2STR(NBD_CMD_DISC);
  36         ENUM2STR(NBD_CMD_FLUSH);
  37         ENUM2STR(NBD_CMD_TRIM);
  38         ENUM2STR(NBD_CMD_CACHE);
  39         ENUM2STR(NBD_CMD_WRITE_ZEROES);
  40         ENUM2STR(NBD_CMD_BLOCK_STATUS);
  41         ENUM2STR(NBD_CMD_RESIZE);
  42         default:
  43                 return "UNKNOWN";
  44         }
  45 }
  46
  47 /**
  48  * Translate a tracelog parameter name into human readable form
  49  *
  50  * @type tracelog parameter number from struct nbd_req.type
  51  * @return pointer to the name
  52  **/
  53 static inline const char * gettracelogname(uint32_t type) {
  54         switch (type) {
  55         ENUM2STR(NBD_TRACELOG_SET_DATALOG);
  56         default:
  57                 return "UNKNOWN";
  58         }
  59 }
  60
  61 static inline const char *getstructreplname(uint16_t type) {
  62         switch(type) {
  63         ENUM2STR(NBD_REPLY_TYPE_NONE);
  64         ENUM2STR(NBD_REPLY_TYPE_OFFSET_DATA);
  65         ENUM2STR(NBD_REPLY_TYPE_OFFSET_HOLE);
  66         ENUM2STR(NBD_REPLY_TYPE_BLOCK_STATUS);
  67
  68         ENUM2STR(NBD_REPLY_TYPE_ERROR);
  69         ENUM2STR(NBD_REPLY_TYPE_ERROR_OFFSET);
  70         default:
  71                 return "UNKNOWN";
  72         }
  73 }
  74
  75 #undef ENUM2STR
  76
  77 #endif //NBD_HELPER_H