/
tapestat.h
131 lines (116 loc) · 3.9 KB
/
tapestat.h
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/*
* tapestat: report tape statistics
* (C) 2015 Hewlett-Packard Development Company, L.P.
*
* Initial revision by Shane M. SEYMOUR (shane.seymour <at> hpe.com)
* Modified for sysstat by Sebastien GODARD (sysstat <at> orange.fr)
*/
#ifndef _TAPESTAT_H
#define _TAPESTAT_H
#include "common.h"
/* T_: tapestat - D_: Display - F_: Flag */
#define T_D_TIMESTAMP 0x00001
#define T_D_KILOBYTES 0x00002
#define T_D_MEGABYTES 0x00004
#define T_D_OMIT_SINCE_BOOT 0x00008
#define T_D_ISO 0x00010
#define T_D_ZERO_OMIT 0x00020
#define T_D_UNIT 0x00040
#define DISPLAY_TIMESTAMP(m) (((m) & T_D_TIMESTAMP) == T_D_TIMESTAMP)
#define DISPLAY_KILOBYTES(m) (((m) & T_D_KILOBYTES) == T_D_KILOBYTES)
#define DISPLAY_MEGABYTES(m) (((m) & T_D_MEGABYTES) == T_D_MEGABYTES)
#define DISPLAY_OMIT_SINCE_BOOT(m) (((m) & T_D_OMIT_SINCE_BOOT) == T_D_OMIT_SINCE_BOOT)
#define DISPLAY_ISO(m) (((m) & T_D_ISO) == T_D_ISO)
#define DISPLAY_ZERO_OMIT(m) (((m) & T_D_ZERO_OMIT) == T_D_ZERO_OMIT)
#define DISPLAY_UNIT(m) (((m) & T_D_UNIT) == T_D_UNIT)
enum {
TAPE_STATS_INVALID = 0,
TAPE_STATS_VALID = 1
};
#define SYSFS_CLASS_TAPE_DIR PRE "/sys/class/scsi_tape"
#define TAPE_STAT_PATH PRE "/sys/class/scsi_tape/st%i/stats/"
#define TAPE_STAT_FILE_VAL(A, B) \
snprintf(filename, MAXPATHLEN, A, i); \
if ((fp = fopen(filename, "r")) != NULL) { \
if (fscanf(fp, "%"PRId64, &tape_new_stats[i].B) != 1) { \
tape_new_stats[i].valid = TAPE_STATS_INVALID; \
} \
fclose(fp); \
} else { \
tape_new_stats[i].valid = TAPE_STATS_INVALID; \
continue; \
}
/*
* A - tape_stats structure member name, e.g. read_count
* B - calc_stats structure member name, e.g. reads_per_second
*
* These macros are not selfcontained they depend on some other
* variables defined either as global or local to the function.
*/
#define CALC_STAT_CNT(A, B) \
if ((tape_new_stats[i].A == tape_old_stats[i].A) || \
(duration <= 0)) { \
stats->B = 0; \
} else { \
temp = (double) (tape_new_stats[i].A - \
tape_old_stats[i].A) \
/ (((double) duration) / 1000); \
stats->B = (uint64_t) temp; \
}
#define CALC_STAT_KB(A, B) \
if ((tape_new_stats[i].A == tape_old_stats[i].A) || \
(duration <= 0)) { \
stats->B = 0; \
} else { \
temp = (double) (tape_new_stats[i].A - \
tape_old_stats[i].A) \
/ (((double) duration) / 1000.0); \
stats->B = (uint64_t) (temp / 1024.0); \
}
#define TAPE_MAX_PCT 999
#define CALC_STAT_PCT(A, B) \
if ((tape_new_stats[i].A == tape_old_stats[i].A) || \
(duration <= 0)) { \
stats->B = 0; \
} else { \
temp = (double) (tape_new_stats[i].A - \
tape_old_stats[i].A) \
/ (((double) duration)); \
stats->B = (uint64_t) (100.0 * temp / 1000000.0); \
if (stats->B > TAPE_MAX_PCT) \
stats->B = TAPE_MAX_PCT; \
}
struct tape_stats {
uint64_t read_time;
uint64_t write_time;
uint64_t other_time;
uint64_t read_bytes;
uint64_t write_bytes;
uint64_t read_count;
uint64_t write_count;
uint64_t other_count;
uint64_t resid_count;
char valid;
struct timeval tv;
};
struct calc_stats {
uint64_t reads_per_second;
uint64_t writes_per_second;
uint64_t other_per_second;
uint64_t kbytes_read_per_second;
uint64_t kbytes_written_per_second;
uint64_t read_pct_wait;
uint64_t write_pct_wait;
uint64_t all_pct_wait;
uint64_t resids_per_second;
};
void tape_get_updated_stats(void);
void tape_gather_initial_stats(void);
void tape_check_tapes_and_realloc(void);
int get_max_tape_drives(void);
void tape_uninitialise(void);
void tape_initialise(void);
void tape_calc_one_stats(struct calc_stats *, int);
void tape_write_headings(void);
void tape_write_stats(struct calc_stats *, int);
#endif /* _TAPESTAT_H */