ioconf.h

linux下查看系统工具原码,如IOSTAT等

/*
 * ioconf: ioconf configuration file handling code
 * Original code (C) 2004 by Red Hat (Charlie Bennett <[e-mail]>)
 *
 * Modified and maintained by Sebastien GODARD (sysstat <at> wanadoo.fr)
 */

#ifndef _IOCONF_H
#define _IOCONF_H

#define IOC_NAMELEN	31
#define IOC_DESCLEN	63
#define IOC_DEVLEN	47
#define IOC_MAXMINOR	255
#define IOC_LINESIZ	255
#define IOC_PARTLEN	7
#define IOC_FMTLEN	15

#ifndef MAX_BLKDEV
#define MAX_BLKDEV	255
#endif

#define IOCONF	"/etc/sysconfig/sysstat.ioconf"

#define K_NODEV	"nodev"

#define IS_WHOLE(maj,min)	((min % ioconf[maj]->blkp->pcount) == 0)

/*
 * When is C going to get templates?
 */
#define IOC_ALLOC(P,TYPE,SIZE)						\
   do {									\
      if (P == NULL) {							\
         P = (TYPE *) malloc(SIZE);					\
         if (P == NULL) {						\
            perror("malloc");						\
            ioc_free();							\
            return 0;							\
         }								\
      }									\
   }									\
   while (0)
/* That dummy while allows ';' on the line that invokes the macro... */


struct blk_config {
   char name[IOC_NAMELEN + 1];	/* device basename */
   char cfmt[IOC_FMTLEN + 1];	/* controller format string */
   char dfmt[IOC_FMTLEN + 1];	/* disk format string */
   char pfmt[IOC_FMTLEN + 1];	/* partition format string */
   /* ctrlno is in the ioc_entry */
   unsigned int ctrl_explicit;	/* use "cN" in name */
   unsigned int dcount;		/* number of devices handled by this major */
   unsigned int pcount;		/* partitions per device */
   char desc[IOC_DESCLEN + 1];
   /* disk info unit # conversion function */
   char *(*cconv)(unsigned int);

   /* extension properties (all this for initrd?) */
   char ext_name[IOC_NAMELEN + 1];
   unsigned int ext;		/* flag - this is an extension record */
   unsigned int ext_minor;	/* which minor does this apply to */
};

#define BLK_CONFIG_SIZE	(sizeof(struct blk_config))


struct ioc_entry {
   int live;			/* is this a Direct entry? */
   unsigned int ctrlno;		/* controller number */
   char *desc;			/* (dynamic) per-controller description */
   struct blk_config *blkp;	/* the real info, may be a shared ref */
};

#define IOC_ENTRY_SIZE	(sizeof(struct ioc_entry))


extern int   ioc_iswhole(unsigned int, unsigned int);
extern char *ioc_name(unsigned int, unsigned int);

#endif