[mirror_zfs.git] / include / sys / kstat.h

/*****************************************************************************\
 *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
 *  Copyright (C) 2007 The Regents of the University of California.
 *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
 *  UCRL-CODE-235197
 *
 *  This file is part of the SPL, Solaris Porting Layer.
 *  For details, see <http://zfsonlinux.org/>.
 *
 *  The SPL is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; either version 2 of the License, or (at your
 *  option) any later version.
 *
 *  The SPL is distributed in the hope that it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
\*****************************************************************************/

#ifndef _SPL_KSTAT_H
#define _SPL_KSTAT_H

#include <linux/module.h>
#include <linux/proc_compat.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/kmem.h>
#include <sys/mutex.h>

#define KSTAT_STRLEN            31

/* For reference valid classes are:
 * disk, tape, net, controller, vm, kvm, hat, streams, kstat, misc
 */

#define KSTAT_TYPE_RAW          0       /* can be anything; ks_ndata >= 1 */
#define KSTAT_TYPE_NAMED        1       /* name/value pair; ks_ndata >= 1 */
#define KSTAT_TYPE_INTR         2       /* interrupt stats; ks_ndata == 1 */
#define KSTAT_TYPE_IO           3       /* I/O stats; ks_ndata == 1 */
#define KSTAT_TYPE_TIMER        4       /* event timer; ks_ndata >= 1 */
#define KSTAT_TYPE_TXG          5       /* txg sync; ks_ndata >= 1 */
#define KSTAT_NUM_TYPES         6

#define KSTAT_DATA_CHAR         0
#define KSTAT_DATA_INT32        1
#define KSTAT_DATA_UINT32       2
#define KSTAT_DATA_INT64        3
#define KSTAT_DATA_UINT64       4
#define KSTAT_DATA_LONG         5
#define KSTAT_DATA_ULONG        6
#define KSTAT_DATA_STRING       7
#define KSTAT_NUM_DATAS         8

#define KSTAT_INTR_HARD         0
#define KSTAT_INTR_SOFT         1
#define KSTAT_INTR_WATCHDOG     2
#define KSTAT_INTR_SPURIOUS     3
#define KSTAT_INTR_MULTSVC      4
#define KSTAT_NUM_INTRS         5

#define KSTAT_FLAG_VIRTUAL      0x01
#define KSTAT_FLAG_VAR_SIZE     0x02
#define KSTAT_FLAG_WRITABLE     0x04
#define KSTAT_FLAG_PERSISTENT   0x08
#define KSTAT_FLAG_DORMANT      0x10
#define KSTAT_FLAG_UNSUPPORTED  (KSTAT_FLAG_VAR_SIZE | KSTAT_FLAG_WRITABLE | \
				 KSTAT_FLAG_PERSISTENT | KSTAT_FLAG_DORMANT)


#define KS_MAGIC                0x9d9d9d9d

/* Dynamic updates */
#define KSTAT_READ              0
#define KSTAT_WRITE             1

struct kstat_s;

typedef int kid_t;                                  /* unique kstat id */
typedef int kstat_update_t(struct kstat_s *, int);  /* dynamic update cb */

typedef struct kstat_module {
	char             ksm_name[KSTAT_STRLEN+1];  /* module name */
	struct list_head ksm_module_list;           /* module linkage */
	struct list_head ksm_kstat_list;            /* list of kstat entries */
	struct proc_dir_entry *ksm_proc;            /* proc entry */
} kstat_module_t;

typedef struct kstat_s {
	int              ks_magic;                  /* magic value */
        kid_t            ks_kid;                    /* unique kstat ID */
        hrtime_t         ks_crtime;                 /* creation time */
	hrtime_t         ks_snaptime;               /* last access time */
        char             ks_module[KSTAT_STRLEN+1]; /* provider module name */
        int              ks_instance;               /* provider module instance */
        char             ks_name[KSTAT_STRLEN+1];   /* kstat name */
        char             ks_class[KSTAT_STRLEN+1];  /* kstat class */
        uchar_t          ks_type;                   /* kstat data type */
        uchar_t          ks_flags;                  /* kstat flags */
        void             *ks_data;                  /* kstat type-specific data */
        uint_t           ks_ndata;                  /* # of type-specific data records */
        size_t           ks_data_size;              /* size of kstat data section */
        struct proc_dir_entry *ks_proc;             /* proc linkage */
        kstat_update_t   *ks_update;                /* dynamic updates */
        void             *ks_private;               /* private data */
        kmutex_t         ks_lock;                   /* kstat data lock */
        struct list_head ks_list;                   /* kstat linkage */
	kstat_module_t   *ks_owner;                 /* kstat module linkage */
} kstat_t;

typedef struct kstat_named_s {
        char             name[KSTAT_STRLEN];        /* name of counter */
        uchar_t          data_type;                 /* data type */
        union {
                char            c[16];              /* 128-bit int */
                int32_t         i32;                /* 32-bit signed int */
                uint32_t        ui32;               /* 32-bit unsigned int */
                int64_t         i64;                /* 64-bit signed int */
                uint64_t        ui64;               /* 64-bit unsigned int */
                long            l;                  /* native signed long */
                ulong_t         ul;                 /* native unsigned long */
                struct {
                        union {
                                char *ptr;          /* NULL-term string */
                                char __pad[8];      /* 64-bit padding */
                        } addr;
                        uint32_t len;               /* # bytes for strlen + '\0' */
                } string;
        } value;
} kstat_named_t;

#define KSTAT_NAMED_STR_PTR(knptr) ((knptr)->value.string.addr.ptr)
#define KSTAT_NAMED_STR_BUFLEN(knptr) ((knptr)->value.string.len)

typedef struct kstat_intr {
        uint_t intrs[KSTAT_NUM_INTRS];
} kstat_intr_t;

typedef struct kstat_io {
        u_longlong_t     nread;       /* number of bytes read */
        u_longlong_t     nwritten;    /* number of bytes written */
        uint_t           reads;       /* number of read operations */
        uint_t           writes;      /* number of write operations */
        hrtime_t         wtime;       /* cumulative wait (pre-service) time */
        hrtime_t         wlentime;    /* cumulative wait length*time product*/
        hrtime_t         wlastupdate; /* last time wait queue changed */
        hrtime_t         rtime;       /* cumulative run (service) time */
        hrtime_t         rlentime;    /* cumulative run length*time product */
        hrtime_t         rlastupdate; /* last time run queue changed */
        uint_t           wcnt;        /* count of elements in wait state */
        uint_t           rcnt;        /* count of elements in run state */
} kstat_io_t;

typedef struct kstat_timer {
        char         name[KSTAT_STRLEN+1]; /* event name */
        u_longlong_t num_events;           /* number of events */
        hrtime_t     elapsed_time;         /* cumulative elapsed time */
        hrtime_t     min_time;             /* shortest event duration */
        hrtime_t     max_time;             /* longest event duration */
        hrtime_t     start_time;           /* previous event start time */
        hrtime_t     stop_time;            /* previous event stop time */
} kstat_timer_t;

typedef enum kstat_txg_state {
        TXG_STATE_OPEN      = 1,
        TXG_STATE_QUIESCING = 2,
        TXG_STATE_SYNCING   = 3,
        TXG_STATE_COMMITTED = 4,
} kstat_txg_state_t;

typedef struct kstat_txg {
        u_longlong_t       txg;         /* txg id */
        kstat_txg_state_t  state;       /* txg state */
        hrtime_t           birth;       /* birth time stamp */
        u_longlong_t       nread;       /* number of bytes read */
        u_longlong_t       nwritten;    /* number of bytes written */
        uint_t             reads;       /* number of read operations */
        uint_t             writes;      /* number of write operations */
        hrtime_t           open_time;   /* open time */
        hrtime_t           quiesce_time;/* quiesce time */
        hrtime_t           sync_time;   /* sync time */
} kstat_txg_t;

int spl_kstat_init(void);
void spl_kstat_fini(void);

extern kstat_t *__kstat_create(const char *ks_module, int ks_instance,
			     const char *ks_name, const char *ks_class,
			     uchar_t ks_type, uint_t ks_ndata,
			     uchar_t ks_flags);
extern void __kstat_install(kstat_t *ksp);
extern void __kstat_delete(kstat_t *ksp);

#define kstat_create(m,i,n,c,t,s,f)	__kstat_create(m,i,n,c,t,s,f)
#define kstat_install(k)		__kstat_install(k)
#define kstat_delete(k)			__kstat_delete(k)

#endif  /* _SPL_KSTAT_H */
Commit	Line	Data
716154c5 BB	1	/*****************************************************************************\
	2	* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
	3	* Copyright (C) 2007 The Regents of the University of California.
	4	* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
	5	* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
715f6251 BB	6	* UCRL-CODE-235197
715f6251 BB	7	*
716154c5	8	* This file is part of the SPL, Solaris Porting Layer.
3d6af2dd	9	* For details, see <http://zfsonlinux.org/>.
716154c5 BB	10	*
	11	* The SPL is free software; you can redistribute it and/or modify it
	12	* under the terms of the GNU General Public License as published by the
	13	* Free Software Foundation; either version 2 of the License, or (at your
	14	* option) any later version.
715f6251	15	*
716154c5	16	* The SPL is distributed in the hope that it will be useful, but WITHOUT
715f6251 BB	17	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	18	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	19	* for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License along
716154c5 BB	22	* with the SPL. If not, see <http://www.gnu.org/licenses/>.
716154c5 BB	23	\*****************************************************************************/
715f6251	24
09b414e8 BB	25	#ifndef _SPL_KSTAT_H
09b414e8 BB	26	#define _SPL_KSTAT_H
f1ca4da6	27
f1b59d26	28	#include <linux/module.h>
ae4c36ad	29	#include <linux/proc_compat.h>
f4b37741 BB	30	#include <sys/types.h>
f4b37741 BB	31	#include <sys/time.h>
04a479f7	32	#include <sys/kmem.h>
71c9f0b0	33	#include <sys/mutex.h>
f1ca4da6	34
04a479f7	35	#define KSTAT_STRLEN 31
f1ca4da6	36
04a479f7 BB	37	/* For reference valid classes are:
	38	* disk, tape, net, controller, vm, kvm, hat, streams, kstat, misc
	39	*/
f1ca4da6	40
04a479f7 BB	41	#define KSTAT_TYPE_RAW 0 /* can be anything; ks_ndata >= 1 */
	42	#define KSTAT_TYPE_NAMED 1 /* name/value pair; ks_ndata >= 1 */
	43	#define KSTAT_TYPE_INTR 2 /* interrupt stats; ks_ndata == 1 */
	44	#define KSTAT_TYPE_IO 3 /* I/O stats; ks_ndata == 1 */
	45	#define KSTAT_TYPE_TIMER 4 /* event timer; ks_ndata >= 1 */
dba79fcb BB	46	#define KSTAT_TYPE_TXG 5 /* txg sync; ks_ndata >= 1 */
dba79fcb BB	47	#define KSTAT_NUM_TYPES 6
f1ca4da6	48
f1ca4da6 BB	49	#define KSTAT_DATA_CHAR 0
	50	#define KSTAT_DATA_INT32 1
	51	#define KSTAT_DATA_UINT32 2
	52	#define KSTAT_DATA_INT64 3
	53	#define KSTAT_DATA_UINT64 4
04a479f7 BB	54	#define KSTAT_DATA_LONG 5
	55	#define KSTAT_DATA_ULONG 6
	56	#define KSTAT_DATA_STRING 7
	57	#define KSTAT_NUM_DATAS 8
	58
	59	#define KSTAT_INTR_HARD 0
	60	#define KSTAT_INTR_SOFT 1
	61	#define KSTAT_INTR_WATCHDOG 2
	62	#define KSTAT_INTR_SPURIOUS 3
	63	#define KSTAT_INTR_MULTSVC 4
	64	#define KSTAT_NUM_INTRS 5
f1ca4da6	65
04a479f7 BB	66	#define KSTAT_FLAG_VIRTUAL 0x01
	67	#define KSTAT_FLAG_VAR_SIZE 0x02
	68	#define KSTAT_FLAG_WRITABLE 0x04
	69	#define KSTAT_FLAG_PERSISTENT 0x08
	70	#define KSTAT_FLAG_DORMANT 0x10
	71	#define KSTAT_FLAG_UNSUPPORTED (KSTAT_FLAG_VAR_SIZE \| KSTAT_FLAG_WRITABLE \| \
	72	KSTAT_FLAG_PERSISTENT \| KSTAT_FLAG_DORMANT)
f1ca4da6	73
f1ca4da6	74
04a479f7	75	#define KS_MAGIC 0x9d9d9d9d
f1ca4da6	76
9a8b7a74 BB	77	/* Dynamic updates */
	78	#define KSTAT_READ 0
	79	#define KSTAT_WRITE 1
	80
	81	struct kstat_s;
	82
	83	typedef int kid_t; /* unique kstat id */
	84	typedef int kstat_update_t(struct kstat_s , int); / dynamic update cb */
f1ca4da6	85
f2a745c4 RY	86	typedef struct kstat_module {
	87	char ksm_name[KSTAT_STRLEN+1]; /* module name */
	88	struct list_head ksm_module_list; /* module linkage */
	89	struct list_head ksm_kstat_list; /* list of kstat entries */
	90	struct proc_dir_entry ksm_proc; / proc entry */
	91	} kstat_module_t;
	92
f1ca4da6	93	typedef struct kstat_s {
04a479f7 BB	94	int ks_magic; /* magic value */
	95	kid_t ks_kid; /* unique kstat ID */
	96	hrtime_t ks_crtime; /* creation time */
	97	hrtime_t ks_snaptime; /* last access time */
	98	char ks_module[KSTAT_STRLEN+1]; /* provider module name */
	99	int ks_instance; /* provider module instance */
	100	char ks_name[KSTAT_STRLEN+1]; /* kstat name */
	101	char ks_class[KSTAT_STRLEN+1]; /* kstat class */
	102	uchar_t ks_type; /* kstat data type */
	103	uchar_t ks_flags; /* kstat flags */
	104	void ks_data; / kstat type-specific data */
	105	uint_t ks_ndata; /* # of type-specific data records */
	106	size_t ks_data_size; /* size of kstat data section */
	107	struct proc_dir_entry ks_proc; / proc linkage */
9a8b7a74 BB	108	kstat_update_t ks_update; / dynamic updates */
9a8b7a74 BB	109	void ks_private; / private data */
71c9f0b0	110	kmutex_t ks_lock; /* kstat data lock */
04a479f7	111	struct list_head ks_list; /* kstat linkage */
f2a745c4	112	kstat_module_t ks_owner; / kstat module linkage */
f1ca4da6 BB	113	} kstat_t;
	114
	115	typedef struct kstat_named_s {
04a479f7 BB	116	char name[KSTAT_STRLEN]; /* name of counter */
04a479f7 BB	117	uchar_t data_type; /* data type */
f1ca4da6	118	union {
04a479f7 BB	119	char c[16]; /* 128-bit int */
	120	int32_t i32; /* 32-bit signed int */
	121	uint32_t ui32; /* 32-bit unsigned int */
	122	int64_t i64; /* 64-bit signed int */
	123	uint64_t ui64; /* 64-bit unsigned int */
	124	long l; /* native signed long */
	125	ulong_t ul; /* native unsigned long */
f1ca4da6 BB	126	struct {
f1ca4da6 BB	127	union {
04a479f7 BB	128	char ptr; / NULL-term string */
04a479f7 BB	129	char __pad[8]; /* 64-bit padding */
f1ca4da6	130	} addr;
04a479f7 BB	131	uint32_t len; /* # bytes for strlen + '\0' */
	132	} string;
	133	} value;
f1ca4da6 BB	134	} kstat_named_t;
f1ca4da6 BB	135
04a479f7 BB	136	#define KSTAT_NAMED_STR_PTR(knptr) ((knptr)->value.string.addr.ptr)
	137	#define KSTAT_NAMED_STR_BUFLEN(knptr) ((knptr)->value.string.len)
	138
	139	typedef struct kstat_intr {
	140	uint_t intrs[KSTAT_NUM_INTRS];
	141	} kstat_intr_t;
	142
	143	typedef struct kstat_io {
	144	u_longlong_t nread; /* number of bytes read */
	145	u_longlong_t nwritten; /* number of bytes written */
	146	uint_t reads; /* number of read operations */
	147	uint_t writes; /* number of write operations */
	148	hrtime_t wtime; /* cumulative wait (pre-service) time */
	149	hrtime_t wlentime; /* cumulative wait lengthtime product/
	150	hrtime_t wlastupdate; /* last time wait queue changed */
	151	hrtime_t rtime; /* cumulative run (service) time */
	152	hrtime_t rlentime; /* cumulative run lengthtime product /
	153	hrtime_t rlastupdate; /* last time run queue changed */
	154	uint_t wcnt; /* count of elements in wait state */
	155	uint_t rcnt; /* count of elements in run state */
	156	} kstat_io_t;
	157
	158	typedef struct kstat_timer {
	159	char name[KSTAT_STRLEN+1]; /* event name */
	160	u_longlong_t num_events; /* number of events */
	161	hrtime_t elapsed_time; /* cumulative elapsed time */
	162	hrtime_t min_time; /* shortest event duration */
	163	hrtime_t max_time; /* longest event duration */
	164	hrtime_t start_time; /* previous event start time */
	165	hrtime_t stop_time; /* previous event stop time */
	166	} kstat_timer_t;
	167
dba79fcb BB	168	typedef enum kstat_txg_state {
	169	TXG_STATE_OPEN = 1,
	170	TXG_STATE_QUIESCING = 2,
	171	TXG_STATE_SYNCING = 3,
	172	TXG_STATE_COMMITTED = 4,
	173	} kstat_txg_state_t;
	174
	175	typedef struct kstat_txg {
	176	u_longlong_t txg; /* txg id */
	177	kstat_txg_state_t state; /* txg state */
	178	hrtime_t birth; /* birth time stamp */
	179	u_longlong_t nread; /* number of bytes read */
	180	u_longlong_t nwritten; /* number of bytes written */
	181	uint_t reads; /* number of read operations */
	182	uint_t writes; /* number of write operations */
	183	hrtime_t open_time; /* open time */
	184	hrtime_t quiesce_time;/* quiesce time */
	185	hrtime_t sync_time; /* sync time */
	186	} kstat_txg_t;
	187
1114ae6a BB	188	int spl_kstat_init(void);
1114ae6a BB	189	void spl_kstat_fini(void);
04a479f7	190
04a479f7 BB	191	extern kstat_t __kstat_create(const char ks_module, int ks_instance,
	192	const char ks_name, const char ks_class,
	193	uchar_t ks_type, uint_t ks_ndata,
	194	uchar_t ks_flags);
	195	extern void __kstat_install(kstat_t *ksp);
	196	extern void __kstat_delete(kstat_t *ksp);
	197
	198	#define kstat_create(m,i,n,c,t,s,f) __kstat_create(m,i,n,c,t,s,f)
	199	#define kstat_install(k) __kstat_install(k)
	200	#define kstat_delete(k) __kstat_delete(k)
	201
09b414e8	202	#endif /* _SPL_KSTAT_H */