mirror of https://gitee.com/openkylin/sysstat.git
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
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/*
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* ioconf: ioconf configuration file handling code
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* Original code (C) 2004 by Red Hat (Charlie Bennett <ccb@redhat.com>)
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*
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* Modified and maintained by Sebastien GODARD (sysstat <at> orange.fr)
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*/
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#ifndef _IOCONF_H
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#define _IOCONF_H
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#include "sysconfig.h"
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#define IOC_NAMELEN 32
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#define IOC_DESCLEN 64
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#define IOC_DEVLEN 48
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#define IOC_LINESIZ 256
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#define IOC_FMTLEN 16
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#define IOC_XFMTLEN (IOC_FMTLEN + IOC_NAMELEN + 3)
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#ifndef MINORBITS
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#define MINORBITS 20
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#endif
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#define IOC_MAXMINOR ((1U << MINORBITS) - 1)
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#ifndef MAX_BLKDEV
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/* #define MAX_BLKDEV ((1U << (32 - MINORBITS)) - 1) */
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/* Use a lower value since this value is used to allocate arrays statically in ioconf.c */
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#define MAX_BLKDEV 511
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#endif
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#define K_NODEV "nodev"
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#define IS_WHOLE(maj,min) ((min % ioconf[maj]->blkp->pcount) == 0)
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/*
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* When is C going to get templates?
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*/
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#define IOC_ALLOC(P,TYPE,SIZE) \
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do { \
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if (P == NULL) { \
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P = (TYPE *) malloc(SIZE); \
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if (P == NULL) { \
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perror("malloc"); \
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ioc_free(); \
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goto free_and_return; \
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} \
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} \
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} \
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while (0)
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/* That dummy while allows ';' on the line that invokes the macro... */
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struct blk_config {
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char name[IOC_NAMELEN]; /* device basename */
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char cfmt[IOC_XFMTLEN]; /* controller format string */
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char dfmt[IOC_FMTLEN]; /* disk format string */
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char pfmt[IOC_FMTLEN + 2]; /* partition format string */
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/* ctrlno is in the ioc_entry */
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unsigned int ctrl_explicit; /* use "cN" in name */
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unsigned int dcount; /* number of devices handled by this major */
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unsigned int pcount; /* partitions per device */
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char desc[IOC_DESCLEN];
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/* disk info unit # conversion function */
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char *(*cconv)(unsigned int);
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/* extension properties (all this for initrd?) */
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char ext_name[IOC_NAMELEN];
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unsigned int ext; /* flag - this is an extension record */
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unsigned int ext_minor; /* which minor does this apply to */
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};
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#define BLK_CONFIG_SIZE (sizeof(struct blk_config))
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struct ioc_entry {
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int live; /* is this a Direct entry? */
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unsigned int ctrlno; /* controller number */
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unsigned int basemajor; /* Major number of the template */
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char *desc; /* (dynamic) per-controller description */
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struct blk_config *blkp; /* the real info, may be a shared ref */
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};
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#define IOC_ENTRY_SIZE (sizeof(struct ioc_entry))
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int ioc_iswhole
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(unsigned int, unsigned int);
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char *ioc_name
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(unsigned int, unsigned int);
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char *transform_devmapname
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(unsigned int, unsigned int);
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#endif
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