sar: Better handle dynamically registered devices

[sysstat] / sa.h

/*
 * sar/sadc: Report system activity
 * (C) 1999-2016 by Sebastien Godard (sysstat <at> orange.fr)
 */

#ifndef _SA_H
#define _SA_H

#include <stdio.h>

#include "common.h"
#include "prealloc.h"
#include "rd_stats.h"
#include "rd_sensors.h"

/*
 ***************************************************************************
 * Activity identification values.
 ***************************************************************************
 */

/* Number of activities */
#define NR_ACT          39
/* The value below is used for sanity check */
#define MAX_NR_ACT      256

/* Number of functions used to count items */
#define NR_F_COUNT      11

/* Activities */
#define A_CPU           1
#define A_PCSW          2
#define A_IRQ           3
#define A_SWAP          4
#define A_PAGE          5
#define A_IO            6
#define A_MEMORY        7
#define A_KTABLES       8
#define A_QUEUE         9
#define A_SERIAL        10
#define A_DISK          11
#define A_NET_DEV       12
#define A_NET_EDEV      13
#define A_NET_NFS       14
#define A_NET_NFSD      15
#define A_NET_SOCK      16
#define A_NET_IP        17
#define A_NET_EIP       18
#define A_NET_ICMP      19
#define A_NET_EICMP     20
#define A_NET_TCP       21
#define A_NET_ETCP      22
#define A_NET_UDP       23
#define A_NET_SOCK6     24
#define A_NET_IP6       25
#define A_NET_EIP6      26
#define A_NET_ICMP6     27
#define A_NET_EICMP6    28
#define A_NET_UDP6      29
#define A_PWR_CPUFREQ   30
#define A_PWR_FAN       31
#define A_PWR_TEMP      32
#define A_PWR_IN        33
#define A_HUGE          34
#define A_PWR_WGHFREQ   35
#define A_PWR_USB       36
#define A_FILESYSTEM    37
#define A_NET_FC        38
#define A_NET_SOFT      39


/* Macro used to flag an activity that should be collected */
#define COLLECT_ACTIVITY(m)     act[get_activity_position(act, m, EXIT_IF_NOT_FOUND)]->options |= AO_COLLECTED

/* Macro used to flag an activity that should be selected */
#define SELECT_ACTIVITY(m)      act[get_activity_position(act, m, EXIT_IF_NOT_FOUND)]->options |= AO_SELECTED


/*
 ***************************************************************************
 * Flags.
 ***************************************************************************
 */

#define S_F_SINCE_BOOT          0x00000001
#define S_F_SA_ROTAT            0x00000002
#define S_F_DEV_PRETTY          0x00000004
#define S_F_FORCE_FILE          0x00000008
#define S_F_INTERVAL_SET        0x00000010
#define S_F_TRUE_TIME           0x00000020
#define S_F_LOCK_FILE           0x00000040
#define S_F_SEC_EPOCH           0x00000080
#define S_F_HDR_ONLY            0x00000100
#define S_F_FILE_LOCKED         0x00000200
#define S_F_SA_YYYYMMDD         0x00000400
#define S_F_HORIZONTALLY        0x00000800
#define S_F_COMMENT             0x00001000
#define S_F_PERSIST_NAME        0x00002000
#define S_F_LOCAL_TIME          0x00004000
#define S_F_PREFD_TIME_OUTPUT   0x00008000
#define S_F_SVG_SKIP            0x00010000
#define S_F_SVG_AUTOSCALE       0x00020000
#define S_F_SVG_ONE_DAY         0x00040000
#define S_F_SVG_SHOW_IDLE       0x00080000
#define S_F_UNIT                0x00100000

#define WANT_SINCE_BOOT(m)              (((m) & S_F_SINCE_BOOT)   == S_F_SINCE_BOOT)
#define WANT_SA_ROTAT(m)                (((m) & S_F_SA_ROTAT)     == S_F_SA_ROTAT)
#define USE_PRETTY_OPTION(m)            (((m) & S_F_DEV_PRETTY)   == S_F_DEV_PRETTY)
#define FORCE_FILE(m)                   (((m) & S_F_FORCE_FILE)   == S_F_FORCE_FILE)
#define INTERVAL_SET(m)                 (((m) & S_F_INTERVAL_SET) == S_F_INTERVAL_SET)
#define PRINT_TRUE_TIME(m)              (((m) & S_F_TRUE_TIME)    == S_F_TRUE_TIME)
#define LOCK_FILE(m)                    (((m) & S_F_LOCK_FILE)    == S_F_LOCK_FILE)
#define PRINT_SEC_EPOCH(m)              (((m) & S_F_SEC_EPOCH)    == S_F_SEC_EPOCH)
#define DISPLAY_HDR_ONLY(m)             (((m) & S_F_HDR_ONLY)     == S_F_HDR_ONLY)
#define FILE_LOCKED(m)                  (((m) & S_F_FILE_LOCKED)  == S_F_FILE_LOCKED)
#define USE_SA_YYYYMMDD(m)              (((m) & S_F_SA_YYYYMMDD)  == S_F_SA_YYYYMMDD)
#define DISPLAY_HORIZONTALLY(m)         (((m) & S_F_HORIZONTALLY) == S_F_HORIZONTALLY)
#define DISPLAY_COMMENT(m)              (((m) & S_F_COMMENT)      == S_F_COMMENT)
#define DISPLAY_PERSIST_NAME_S(m)       (((m) & S_F_PERSIST_NAME) == S_F_PERSIST_NAME)
#define PRINT_LOCAL_TIME(m)             (((m) & S_F_LOCAL_TIME)   == S_F_LOCAL_TIME)
#define USE_PREFD_TIME_OUTPUT(m)        (((m) & S_F_PREFD_TIME_OUTPUT)   == S_F_PREFD_TIME_OUTPUT)
#define SKIP_EMPTY_VIEWS(m)             (((m) & S_F_SVG_SKIP)     == S_F_SVG_SKIP)
#define AUTOSCALE_ON(m)                 (((m) & S_F_SVG_AUTOSCALE) == S_F_SVG_AUTOSCALE)
#define DISPLAY_ONE_DAY(m)              (((m) & S_F_SVG_ONE_DAY)   == S_F_SVG_ONE_DAY)
#define DISPLAY_IDLE(m)                 (((m) & S_F_SVG_SHOW_IDLE) == S_F_SVG_SHOW_IDLE)
#define DISPLAY_UNIT(m)                 (((m) & S_F_UNIT) == S_F_UNIT)

#define AO_F_NULL               0x00000000

/* Output flags for options -R / -r / -S */
#define AO_F_MEM_DIA            0x00000001
#define AO_F_MEM_AMT            0x00000002
#define AO_F_MEM_SWAP           0x00000004
/* AO_F_MEM_ALL: See opt_flags in struct activity below */
#define AO_F_MEM_ALL            (AO_F_MEM_AMT << 8)

#define DISPLAY_MEMORY(m)       (((m) & AO_F_MEM_DIA)     == AO_F_MEM_DIA)
#define DISPLAY_MEM_AMT(m)      (((m) & AO_F_MEM_AMT)     == AO_F_MEM_AMT)
#define DISPLAY_SWAP(m)         (((m) & AO_F_MEM_SWAP)    == AO_F_MEM_SWAP)
#define DISPLAY_MEM_ALL(m)      (((m) & AO_F_MEM_ALL)     == AO_F_MEM_ALL)

/* Output flags for option -u [ ALL ] */
#define AO_F_CPU_DEF            0x00000001
#define AO_F_CPU_ALL            0x00000002

#define DISPLAY_CPU_DEF(m)      (((m) & AO_F_CPU_DEF)     == AO_F_CPU_DEF)
#define DISPLAY_CPU_ALL(m)      (((m) & AO_F_CPU_ALL)     == AO_F_CPU_ALL)

/* Output flags for option -d */
#define AO_F_DISK_PART          0x00000001

#define COLLECT_PARTITIONS(m)   (((m) & AO_F_DISK_PART)   == AO_F_DISK_PART)

/* Output flags for option -F */
#define AO_F_FILESYSTEM         0x00000001
#define AO_F_MOUNT              0x00000002

#define DISPLAY_MOUNT(m)        (((m) & AO_F_MOUNT)       == AO_F_MOUNT)

/*
 ***************************************************************************
 * Various keywords and constants.
 ***************************************************************************
 */

/* Keywords */
#define K_XALL          "XALL"
#define K_SUM           "SUM"
#define K_DEV           "DEV"
#define K_EDEV          "EDEV"
#define K_NFS           "NFS"
#define K_NFSD          "NFSD"
#define K_SOCK          "SOCK"
#define K_IP            "IP"
#define K_EIP           "EIP"
#define K_ICMP          "ICMP"
#define K_EICMP         "EICMP"
#define K_TCP           "TCP"
#define K_ETCP          "ETCP"
#define K_UDP           "UDP"
#define K_SOCK6         "SOCK6"
#define K_IP6           "IP6"
#define K_EIP6          "EIP6"
#define K_ICMP6         "ICMP6"
#define K_EICMP6        "EICMP6"
#define K_UDP6          "UDP6"
#define K_CPU           "CPU"
#define K_FAN           "FAN"
#define K_TEMP          "TEMP"
#define K_IN            "IN"
#define K_FREQ          "FREQ"
#define K_MOUNT         "MOUNT"
#define K_FC            "FC"
#define K_SOFT          "SOFT"

#define K_INT           "INT"
#define K_DISK          "DISK"
#define K_XDISK         "XDISK"
#define K_SNMP          "SNMP"
#define K_IPV6          "IPV6"
#define K_POWER         "POWER"
#define K_USB           "USB"

#define K_SKIP_EMPTY    "skipempty"
#define K_AUTOSCALE     "autoscale"
#define K_ONEDAY        "oneday"
#define K_SHOWIDLE      "showidle"

/* Groups of activities */
#define G_DEFAULT       0x00
#define G_INT           0x01
#define G_DISK          0x02
#define G_SNMP          0x04
#define G_IPV6          0x08
#define G_POWER         0x10
#define G_XDISK         0x20

/* sadc program */
#define SADC            "sadc"

/* Time must have the format HH:MM:SS with HH in 24-hour format */
#define DEF_TMSTART     "08:00:00"
#define DEF_TMEND       "18:00:00"

#define UTSNAME_LEN     65
#define HEADER_LINE_LEN 512

/*
 * Define upper limit for various items.
 * Made necessary because we have to check the number of
 * items for each activity when we read a (possibly tainted)
 * sa data file.
 */
#define MAX_NR_SERIAL_LINES     512
#define MAX_NR_DISKS            8192
#define MAX_NR_IFACES           512
#define MAX_NR_FANS             128
#define MAX_NR_TEMP_SENSORS     128
#define MAX_NR_IN_SENSORS       128
#define MAX_NR_USB              1024
#define MAX_NR_FS               8192
#define MAX_NR_FCHOSTS          8192

/* NR_MAX is the upper limit used for unknown activities */
#define NR_MAX          65536
#define NR2_MAX         128

/* Maximum number of args that can be passed to sadc */
#define MAX_ARGV_NR     32

/* Miscellaneous constants */
#define USE_SADC                0
#define USE_SA_FILE             1
#define NO_TM_START             0
#define NO_TM_END               0
#define NO_RESET                0
#define NON_FATAL               0
#define FATAL                   1
#define C_SAR                   0
#define C_SADF                  1
#define ALL_ACTIVITIES          ~0U
#define EXIT_IF_NOT_FOUND       1
#define RESUME_IF_NOT_FOUND     0

#define SOFT_SIZE       0
#define HARD_SIZE       1

#define FIRST   0
#define SECOND  1
#define THIRD   2

#define CLOSE_XML_MARKUP        0
#define OPEN_XML_MARKUP         1

#define CLOSE_JSON_MARKUP       0
#define OPEN_JSON_MARKUP        1

#define COUNT_ACTIVITIES        0
#define COUNT_OUTPUTS           1

/* Type for all functions counting items */
#define __nr_t          int
/* Type for all functions reading statistics */
#define __read_funct_t  void
/* Type for all functions displaying statistics */
#define __print_funct_t void

/* Structure for SVG specific parameters */
struct svg_parm {
        unsigned long dt;               /* Interval of time for current sample */
        unsigned long ust_time_ref;     /* X axis start time in seconds since the epoch */
        unsigned long ust_time_end;     /* X axis end time in seconds since the epoch */
        unsigned long ust_time_first;   /* Time (in seconds since the epoch) for first sample */
        int graph_no;                   /* Total number of views already displayed */
        int restart;                    /* TRUE if we have just met a RESTART record */
};


/*
 ***************************************************************************
 * Definitions of header structures.
 *
 * Format of system activity data files:
 *       __
 *      |
 *      | file_magic structure
 *      |
 *      |--
 *      |
 *      | file_header structure
 *      |
 *      |--                         --|
 *      |                             |
 *      | file_activity structure     | * sa_act_nr
 *      |                             |
 *      |--                         --|
 *      |                             |
 *      | record_header structure     |
 *      |                             |
 *      |--                           | * <count>
 *      |                             |
 *      | Statistics structures...(*) |
 *      |                             |
 *      |--                         --|
 *
 * (*)Note: If it's a special record, we may find a comment instead of
 * statistics (R_COMMENT record type) or, if it's a R_RESTART record type,
 * <sa_nr_vol_act> structures (of type file_activity) for the volatile
 * activities.
 ***************************************************************************
 */

/*
 * Sysstat magic number. Should never be modified.
 * Indicate that the file was created by sysstat.
 */
#define SYSSTAT_MAGIC   0xd596

/*
 * Datafile format magic number.
 * Modified to indicate that the format of the file is
 * no longer compatible with that of previous sysstat versions.
 */
#define FORMAT_MAGIC    0x2173

/* Previous datafile format magic number used by older sysstat versions */
#define PREVIOUS_FORMAT_MAGIC   0x2171

/* Padding in file_magic structure. See below. */
#define FILE_MAGIC_PADDING      63

/* Structure for file magic header data */
struct file_magic {
        /*
         * This field identifies the file as a file created by sysstat.
         */
        unsigned short sysstat_magic;
        /*
         * The value of this field varies whenever datafile format changes.
         */
        unsigned short format_magic;
        /*
         * Sysstat version used to create the file.
         */
        unsigned char sysstat_version;
        unsigned char sysstat_patchlevel;
        unsigned char sysstat_sublevel;
        unsigned char sysstat_extraversion;
        /*
         * Size of file's header (size of file_header structure used by file).
         */
        unsigned int header_size;
        /*
         * Set to non zero if data file has been converted with "sadf -c" from
         * an old format (version x.y.z) to a newest format (version X.Y.Z).
         * In this case, the value is: Y*16 + Z + 1.
         * The FORMAT_MAGIC value of the file can be used to determine X.
         */
        unsigned char upgraded;
        /*
         * Padding. Reserved for future use while avoiding a format change.
         */
        unsigned char pad[FILE_MAGIC_PADDING];
};

#define FILE_MAGIC_SIZE (sizeof(struct file_magic))


/* Header structure for system activity data file */
struct file_header {
        /*
         * Timestamp in seconds since the epoch.
         */
        unsigned long sa_ust_time       __attribute__ ((aligned (8)));
        /*
         * Number of CPU items (1 .. CPU_NR + 1) for the last sample in file.
         */
        unsigned int sa_last_cpu_nr     __attribute__ ((aligned (8)));
        /*
         * Number of activities saved in file.
         */
        unsigned int sa_act_nr;
        /*
         * Number of volatile activities in file. This is the number of
         * file_activity structures saved after each restart mark in file.
         */
        unsigned int sa_vol_act_nr;
        /*
         * Current day, month and year.
         * No need to save DST (Daylight Saving Time) flag, since it is not taken
         * into account by the strftime() function used to print the timestamp.
         */
        unsigned char sa_day;
        unsigned char sa_month;
        unsigned char sa_year;
        /*
         * Size of a long integer. Useful to know the architecture on which
         * the datafile was created.
         */
        char sa_sizeof_long;
        /*
         * Operating system name.
         */
        char sa_sysname[UTSNAME_LEN];
        /*
         * Machine hostname.
         */
        char sa_nodename[UTSNAME_LEN];
        /*
         * Operating system release number.
         */
        char sa_release[UTSNAME_LEN];
        /*
         * Machine architecture.
         */
        char sa_machine[UTSNAME_LEN];
};

#define FILE_HEADER_SIZE        (sizeof(struct file_header))
/* The values below are used for sanity check */
#define MIN_FILE_HEADER_SIZE    0
#define MAX_FILE_HEADER_SIZE    8192


/*
 * Base magical number for activities.
 */
#define ACTIVITY_MAGIC_BASE     0x8a
/*
 * Magical value used for activities with
 * unknown format (used for sadf -H only).
 */
#define ACTIVITY_MAGIC_UNKNOWN  0x89

/* List of activities saved in file */
struct file_activity {
        /*
         * Identification value of activity.
         */
        unsigned int id         __attribute__ ((aligned (4)));
        /*
         * Activity magical number.
         */
        unsigned int magic      __attribute__ ((packed));
        /*
         * Number of items for this activity.
         */
        __nr_t nr               __attribute__ ((packed));
        /*
         * Number of sub-items for this activity.
         */
        __nr_t nr2              __attribute__ ((packed));
        /*
         * Size of an item structure.
         */
        int size                __attribute__ ((packed));
};

#define FILE_ACTIVITY_SIZE      (sizeof(struct file_activity))


/* Record type */
/*
 * R_STATS means that this is a record of statistics.
 */
#define R_STATS         1
/*
 * R_RESTART means that this is a special record containing
 * a LINUX RESTART message.
 */
#define R_RESTART       2
/*
 * R_LAST_STATS warns sar that this is the last record to be written
 * to file before a file rotation, and that the next data to come will
 * be a header file.
 * Such a record is tagged R_STATS anyway before being written to file.
 */
#define R_LAST_STATS    3
/*
 * R_COMMENT means that this is a special record containing
 * a comment.
 */
#define R_COMMENT       4

/* Maximum length of a comment */
#define MAX_COMMENT_LEN 64

/* Header structure for every record */
struct record_header {
        /*
         * Machine uptime (multiplied by the # of proc).
         */
        unsigned long long uptime       __attribute__ ((aligned (16)));
        /*
         * Uptime reduced to one processor. Always set, even on UP machines.
         */
        unsigned long long uptime0      __attribute__ ((aligned (16)));
        /*
         * Timestamp (number of seconds since the epoch).
         */
        unsigned long ust_time          __attribute__ ((aligned (16)));
        /*
         * Record type: R_STATS, R_RESTART,...
         */
        unsigned char record_type       __attribute__ ((aligned (8)));
        /*
         * Timestamp: Hour (0-23), minute (0-59) and second (0-59).
         * Used to determine TRUE time (immutable, non locale dependent time).
         */
        unsigned char hour;
        unsigned char minute;
        unsigned char second;
};

#define RECORD_HEADER_SIZE      (sizeof(struct record_header))


/*
 ***************************************************************************
 * Generic description of an activity.
 ***************************************************************************
 */

/* Activity options */
#define AO_NULL                 0x00
/*
 * Indicate that corresponding activity should be collected by sadc.
 */
#define AO_COLLECTED            0x01
/*
 * Indicate that corresponding activity should be displayed by sar.
 */
#define AO_SELECTED             0x02
/*
 * When appending data to a file, the number of items (for every activity)
 * is forced to that of the file (number of network interfaces, serial lines,
 * etc.) Exceptions are volatile activities (like A_CPU) whose number of items
 * is related to the number of CPUs: If current machine has a different number
 * of CPU than that of the file (but is equal to sa_last_cpu_nr) then data
 * will be appended with a number of items equal to that of the machine.
 */
#define AO_VOLATILE             0x04
/*
 * Indicate that the interval of time, given to f_print() function
 * displaying statistics, should be the interval of time in jiffies
 * multiplied by the number of processors.
 */
#define AO_GLOBAL_ITV           0x08
/*
 * This flag should be set for every activity closing a markup used
 * by several activities. Used by sadf f_xml_print() functions to
 * display XML output.
 */
#define AO_CLOSE_MARKUP         0x10
/*
 * Indicate that corresponding activity has multiple different
 * output formats. This is the case for example for memory activity
 * with options -r and -R.
 * PS: Such an activity should appear in the list of activities that
 * sar -A is supposed to display.
 */
#define AO_MULTIPLE_OUTPUTS     0x20
/*
 * Indicate that one (SVG) graph will be displayed for each
 * distinct item for this activity (sadf -g).
 */
#define AO_GRAPH_PER_ITEM       0x40

#define IS_COLLECTED(m)         (((m) & AO_COLLECTED)        == AO_COLLECTED)
#define IS_SELECTED(m)          (((m) & AO_SELECTED)         == AO_SELECTED)
#define IS_VOLATILE(m)          (((m) & AO_VOLATILE)         == AO_VOLATILE)
#define NEED_GLOBAL_ITV(m)      (((m) & AO_GLOBAL_ITV)       == AO_GLOBAL_ITV)
#define CLOSE_MARKUP(m)         (((m) & AO_CLOSE_MARKUP)     == AO_CLOSE_MARKUP)
#define HAS_MULTIPLE_OUTPUTS(m) (((m) & AO_MULTIPLE_OUTPUTS) == AO_MULTIPLE_OUTPUTS)
#define ONE_GRAPH_PER_ITEM(m)   (((m) & AO_GRAPH_PER_ITEM)   == AO_GRAPH_PER_ITEM)

#define _buf0   buf[0]

/* Structure used to define a bitmap needed by an activity */
struct act_bitmap {
        /*
         * Bitmap for activities that need one. Remember to allocate it
         * before use!
         */
        unsigned char *b_array;
        /*
         * Size of the bitmap in bits. In fact, bitmap is sized to b_size + 1
         * to take into account CPU "all"
         */
        int b_size;
};

/*
 * Structure used to define an activity.
 * Note: This structure can be modified without changing the format of data files.
 */
struct activity {
        /*
         * This variable contains the identification value (A_...) for this activity.
         */
        unsigned int id;
        /*
         * Activity options (AO_...)
         */
        unsigned int options;
        /*
         * Activity magical number. This number changes when activity format in file
         * is no longer compatible with the format of that same activity from
         * previous versions.
         */
        unsigned int magic;
        /*
         * An activity belongs to a group (and only one).
         * Groups are those selected with option -S of sadc.
         */
        unsigned int group;
        /*
         * Index in f_count[] array to determine function used to count
         * the number of items (serial lines, network interfaces, etc.) -> @nr
         * Such a function should _always_ return a value greater than
         * or equal to 0.
         *
         * A value of -1 indicates that the number of items
         * is a constant (and @nr is set to this value).
         *
         * These functions are called even if corresponding activities have not
         * been selected, to make sure that all items have been calculated
         * (including #CPU, etc.)
         */
        int f_count_index;
        /*
         * The f_count2() function is used to count the number of
         * sub-items -> @nr2
         * Such a function should _always_ return a value greater than
         * or equal to 0.
         *
         * A NULL value for this function pointer indicates that the number of items
         * is a constant (and @nr2 is set to this value).
         */
        __nr_t (*f_count2) (struct activity *);
        /*
         * This function reads the relevant file and fill the buffer
         * with statistics corresponding to given activity.
         */
        __read_funct_t (*f_read) (struct activity *);
        /*
         * This function displays activity statistics onto the screen.
         */
        __print_funct_t (*f_print) (struct activity *, int, int, unsigned long long);
        /*
         * This function displays average activity statistics onto the screen.
         */
        __print_funct_t (*f_print_avg) (struct activity *, int, int, unsigned long long);
        /*
         * This function is used by sadf to display activity in a format that can
         * easily be ingested by a relational database, or a format that can be
         * handled by pattern processing commands like "awk".
         */
        __print_funct_t (*f_render) (struct activity *, int, char *, int, unsigned long long);
        /*
         * This function is used by sadf to display activity statistics in XML.
         */
        __print_funct_t (*f_xml_print) (struct activity *, int, int, unsigned long long);
        /*
         * This function is used by sadf to display activity statistics in JSON.
         */
        __print_funct_t (*f_json_print) (struct activity *, int, int, unsigned long long);
        /*
         * This function is used by sadf to display activity statistics in SVG.
         */
        __print_funct_t (*f_svg_print) (struct activity *, int, int, struct svg_parm *,
                                        unsigned long long, struct record_header *);
        /*
         * Header string displayed by sadf -d.
         * Header lines for each output (for activities with multiple outputs) are
         * separated with a '|' character.
         * For a given output, the first field corresponding to extended statistics
         * (eg. -r ALL) begins with a '&' character.
         */
        char *hdr_line;
        /*
         * Name of activity.
         */
        char *name;
        /*
         * Number of SVG graphs for this activity. The total number of graphs for
         * the activity can be greater though if flag AO_GRAPH_PER_ITEM is set, in
         * which case the total number will  be @g_nr * @nr.
         */
        int g_nr;
        /*
         * Number of items on the system.
         * A negative value (-1) is the default value and indicates that this number
         * has still not been calculated by the f_count() function.
         * A value of 0 means that this number has been calculated, but no items have
         * been found.
         * A positive value (>0) has either been calculated or is a constant.
         */
        __nr_t nr;
        /*
         * Number of sub-items on the system.
         * @nr2 is in fact the second dimension of a matrix of items, the first
         * one being @nr. @nr is the number of lines, and @nr2 the number of columns.
         * A negative value (-1) is the default value and indicates that this number
         * has still not been calculated by the f_count2() function.
         * A value of 0 means that this number has been calculated, but no sub-items have
         * been found.
         * A positive value (>0) has either been calculated or is a constant.
         * Rules:
         * 1) IF @nr2 = 0 THEN @nr = 0
         *    Note: If @nr = 0, then @nr2 is undetermined (may be -1, 0 or >0).
         * 2) IF @nr > 0 THEN @nr2 > 0.
         *    Note: If @nr2 > 0 then @nr is undetermined (may be -1, 0 or >0).
         * 3) IF @nr <= 0 THEN @nr2 = -1 (this is the default value for @nr2,
         * meaning that it has not been calculated).
         */
        __nr_t nr2;
        /*
         * Maximum number of elements that sar can handle for this item.
         * NB: The maximum number of elements that sar can handle for sub-items
         * is NR2_MAX.
         */
        __nr_t nr_max;
        /*
         * Size of an item.
         * This is the size of the corresponding structure, as read from or written
         * to a file, or read from or written by the data collector.
         */
        int fsize;
        /*
         * Size of an item.
         * This is the size of the corresponding structure as mapped into memory.
         * @msize can be different from @fsize when data are read from or written to
         * a data file from a different sysstat version.
         */
        int msize;
        /*
         * Optional flags for activity. This is eg. used when AO_MULTIPLE_OUTPUTS
         * option is set.
         * 0x0001 - 0x0080 : Multiple outputs (eg. AO_F_MEM_AMT, AO_F_MEM_SWAP...)
         * 0x0100 - 0x8000 : If bit set then display complete header (hdr_line) for
         *                   corresponding output
         * 0x010000+       : Optional flags
         */
        unsigned int opt_flags;
        /*
         * Buffers that will contain the statistics read. Its size is @nr * @nr2 * @size each.
         * [0]: used by sadc.
         * [0] and [1]: current/previous statistics values (used by sar).
         * [2]: Used by sar to save first collected stats (used later to
         * compute average).
         */
        void *buf[3];
        /*
         * Bitmap for activities that need one. Such a bitmap is needed by activity
         * if @bitmap is not NULL.
         */
        struct act_bitmap *bitmap;
};


/*
 ***************************************************************************
 * Generic description of an output format for sadf (and sar).
 ***************************************************************************
 */

/* Type for all functions used by sadf to display stats in various formats */
#define __printf_funct_t void
#define __tm_funct_t char *

/*
 * Structure used to define a report.
 * A XML-like report has the following format:
 *       __
 *      |
 *      | Header block
 *      |  __
 *      | |
 *      | | Statistics block
 *      | |  __
 *      | | |
 *      | | | Timestamp block
 *      | | |  __
 *      | | | |
 *      | | | | Activity #1
 *      | | | |__
 *      | | | |
 *      | | | | ...
 *      | | | |__
 *      | | | |
 *      | | | | Activity #n
 *      | | | |__
 *      | | |__
 *      | |__
 *      | |
 *      | | Restart messages block
 *      | |__
 *      | |
 *      | | Comments block
 *      | |__
 *      |__
 */
struct report_format {
        /*
         * This variable contains the identification value (F_...) for this report format.
         */
        unsigned int id;
        /*
         * Format options (FO_...).
         */
        unsigned int options;
        /*
         * This function displays the report header
         * (data displayed once at the beginning of the report).
         */
        __printf_funct_t (*f_header) (void *, int, char *, struct file_magic *, struct file_header *,
                                      __nr_t, struct activity * [], unsigned int []);
        /*
         * This function defines the statistics part of the report.
         * Used only with textual (XML-like) reports.
         */
        __printf_funct_t (*f_statistics) (int *, int);
        /*
         * This function defines the timestamp part of the report.
         * Used only with textual (XML-like) reports.
         */
        __tm_funct_t (*f_timestamp) (void *, int, char *, char *, unsigned long long,
                                     struct file_header *, unsigned int);
        /*
         * This function displays the restart messages.
         */
        __printf_funct_t (*f_restart) (int *, int, char *, char *, int, struct file_header *,
                                       unsigned int);
        /*
         * This function displays the comments.
         */
        __printf_funct_t (*f_comment) (int *, int, char *, char *, int, char *, struct file_header *);
};

/* Possible actions for functions used to display reports */
#define F_BEGIN 0x01
#define F_MAIN  0x02
#define F_END   0x04

/*
 ***************************************************************************
 * SVG output definitions
 ***************************************************************************
 */

/*
 *   ^
 * 1 | General header
 *   v
 *   ^   ^   ^
 *   |   | 4 | Graph title
 *   |   |   v
 *   |   |   ^    |                                Caption
 *   | 3 |   |    |
 *   |   |   |  G |Y
 * 2 |   | 5 |  r |
 *   |   |   |  a |A
 *   |   |   |  d |x
 *   |   |   |  . |i
 *   |   |   |    |s          X Axis
 *   |   |   v    |-------------------------------
 *   |   |              Grad.
 *   |   v   <---><------------------------------>
 *   |         6                8
 *   | Gap
 *   v<--------------------------------------------------------------->
 *                                    7
 */

/* #8 */
#define SVG_G_XSIZE     720
/* #6 */
#define SVG_M_XSIZE     70
/* #7 */
#define SVG_V_XSIZE     1050

/* #5 */
#define SVG_G_YSIZE     200
/* #1 */
#define SVG_H_YSIZE     50
/* #4 */
#define SVG_M_YSIZE     50
/* #2 */
#define SVG_T_YSIZE     310
/* #3 */
#define SVG_V_YSIZE     300

/* Grid: Nr of horizontal lines */
#define SVG_H_GRIDNR    3
/* Grid: Nr of vertical lines */
#define SVG_V_GRIDNR    10

/* Block size used to allocate arrays for graphs data */
#define CHUNKSIZE       4096

#define SVG_LINE_GRAPH  1
#define SVG_BAR_GRAPH   2

#define MAYBE   0x80

/*
 ***************************************************************************
 * Macro functions definitions.
 *
 * Note: Using 'do ... while' makes the macros safer to use
 * (remember that macro use is followed by a semicolon).
 ***************************************************************************
 */

/* Close file descriptors */
#define CLOSE_ALL(_fd_)         do {                    \
                                        close(_fd_[0]); \
                                        close(_fd_[1]); \
                                } while (0)

#define CLOSE(_fd_)             if (_fd_ >= 0)          \
                                        close(_fd_)


/*
 ***************************************************************************
 * Various structure definitions.
 ***************************************************************************
 */

/* Structure for timestamps */
struct tstamp {
        int tm_sec;
        int tm_min;
        int tm_hour;
        int use;
};


/*
 ***************************************************************************
 * Functions prototypes.
 ***************************************************************************
 */

/* Functions used to count number of items */
__nr_t wrap_get_cpu_nr
        (struct activity *);
__nr_t wrap_get_irq_nr
        (struct activity *);
__nr_t wrap_get_serial_nr
        (struct activity *);
__nr_t wrap_get_disk_nr
        (struct activity *);
__nr_t wrap_get_iface_nr
        (struct activity *);
__nr_t wrap_get_fan_nr
        (struct activity *);
__nr_t wrap_get_temp_nr
        (struct activity *);
__nr_t wrap_get_in_nr
        (struct activity *);
__nr_t wrap_get_freq_nr
        (struct activity *);
__nr_t wrap_get_usb_nr
        (struct activity *);
__nr_t wrap_get_filesystem_nr
        (struct activity *);
__nr_t wrap_get_fchost_nr
        (struct activity *);

/* Functions used to read activities statistics */
__read_funct_t wrap_read_stat_cpu
        (struct activity *);
__read_funct_t wrap_read_stat_pcsw
        (struct activity *);
__read_funct_t wrap_read_stat_irq
        (struct activity *);
__read_funct_t wrap_read_swap
        (struct activity *);
__read_funct_t wrap_read_paging
        (struct activity *);
__read_funct_t wrap_read_io
        (struct activity *);
__read_funct_t wrap_read_meminfo
        (struct activity *);
__read_funct_t wrap_read_kernel_tables
        (struct activity *);
__read_funct_t wrap_read_loadavg
        (struct activity *);
__read_funct_t wrap_read_tty_driver_serial
        (struct activity *);
__read_funct_t wrap_read_disk
        (struct activity *);
__read_funct_t wrap_read_net_dev
        (struct activity *);
__read_funct_t wrap_read_net_edev
        (struct activity *);
__read_funct_t wrap_read_net_nfs
        (struct activity *);
__read_funct_t wrap_read_net_nfsd
        (struct activity *);
__read_funct_t wrap_read_net_sock
        (struct activity *);
__read_funct_t wrap_read_net_ip
        (struct activity *);
__read_funct_t wrap_read_net_eip
        (struct activity *);
__read_funct_t wrap_read_net_icmp
        (struct activity *);
__read_funct_t wrap_read_net_eicmp
        (struct activity *);
__read_funct_t wrap_read_net_tcp
        (struct activity *);
__read_funct_t wrap_read_net_etcp
        (struct activity *);
__read_funct_t wrap_read_net_udp
        (struct activity *);
__read_funct_t wrap_read_net_sock6
        (struct activity *);
__read_funct_t wrap_read_net_ip6
        (struct activity *);
__read_funct_t wrap_read_net_eip6
        (struct activity *);
__read_funct_t wrap_read_net_icmp6
        (struct activity *);
__read_funct_t wrap_read_net_eicmp6
        (struct activity *);
__read_funct_t wrap_read_net_udp6
        (struct activity *);
__read_funct_t wrap_read_cpuinfo
        (struct activity *);
__read_funct_t wrap_read_fan
        (struct activity *);
__read_funct_t wrap_read_temp
        (struct activity *);
__read_funct_t wrap_read_in
        (struct activity *);
__read_funct_t wrap_read_meminfo_huge
        (struct activity *);
__read_funct_t wrap_read_time_in_state
        (struct activity *);
__read_funct_t wrap_read_bus_usb_dev
        (struct activity *);
__read_funct_t wrap_read_filesystem
        (struct activity *);
__read_funct_t wrap_read_fchost
        (struct activity *);
__read_funct_t wrap_read_softnet
        (struct activity *);

/* Other functions */
void allocate_bitmaps
        (struct activity * []);
void allocate_structures
        (struct activity * []);
int check_alt_sa_dir
        (char *, int, int);
int check_disk_reg
        (struct activity *, int, int, int);
void check_file_actlst
        (int *, char *, struct activity * [], struct file_magic *, struct file_header *,
         struct file_activity **, unsigned int [], int);
int check_net_dev_reg
        (struct activity *, int, int, int);
int check_net_edev_reg
        (struct activity *, int, int, int);
double compute_ifutil
        (struct stats_net_dev *, double, double);
void copy_structures
        (struct activity * [], unsigned int [], struct record_header [], int, int);
int datecmp
        (struct tm *, struct tstamp *);
void display_sa_file_version
        (FILE *, struct file_magic *);
void enum_version_nr
        (struct file_magic *);
void free_bitmaps
        (struct activity * []);
void free_structures
        (struct activity * []);
int get_activity_nr
        (struct activity * [], unsigned int, int);
int get_activity_position
        (struct activity * [], unsigned int, int);
char *get_devname
        (unsigned int, unsigned int, int);
void get_file_timestamp_struct
        (unsigned int, struct tm *, struct file_header *);
void get_itv_value
        (struct record_header *, struct record_header *, unsigned int,
         unsigned long long *, unsigned long long *);
void handle_invalid_sa_file
        (int *, struct file_magic *, char *, int);
int next_slice
        (unsigned long long, unsigned long long, int, long);
int parse_sar_opt
        (char * [], int *, struct activity * [], unsigned int *, int);
int parse_sar_I_opt
        (char * [], int *, struct activity * []);
int parse_sa_P_opt
        (char * [], int *, unsigned int *, struct activity * []);
int parse_sar_m_opt
        (char * [], int *, struct activity * []);
int parse_sar_n_opt
        (char * [], int *, struct activity * []);
int parse_timestamp
        (char * [], int *, struct tstamp *, const char *);
void print_report_hdr
        (unsigned int, struct tm *, struct file_header *, int);
void print_sar_comment
        (int *, int, char *, char *, int, char *, struct file_header *);
void print_sar_restart
        (int *, int, char *, char *, int, struct file_header *, unsigned int);
int print_special_record
        (struct record_header *, unsigned int, struct tstamp *, struct tstamp *,
         int, int, struct tm *, struct tm *, char *, int, struct file_magic *,
         struct file_header *, struct activity * [], struct report_format *);
void read_file_stat_bunch
        (struct activity * [], int, int, int, struct file_activity *);
__nr_t read_vol_act_structures
        (int, struct activity * [], char *, struct file_magic *, unsigned int);
int reallocate_vol_act_structures
        (struct activity * [], unsigned int, unsigned int);
void replace_nonprintable_char
        (int, char *);
int sa_fread
        (int, void *, int, int);
int sa_get_record_timestamp_struct
        (unsigned int, struct record_header *, struct tm *, struct tm *);
int sa_open_read_magic
        (int *, char *, struct file_magic *, int);
void select_all_activities
        (struct activity * []);
void select_default_activity
        (struct activity * []);
void set_bitmap
        (unsigned char [], unsigned char, unsigned int);
void set_default_file
        (char *, int, int);
void set_hdr_rectime
        (unsigned int, struct tm *, struct file_header *);
void set_record_timestamp_string
        (unsigned int, struct record_header *, char *, char *, int, struct tm *);

#endif  /* _SA_H */