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Add the bare minimum functionality to support dynamic kstats. A complete kstat implementation should be done as part of issue #84. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #84
173 lines
7.6 KiB
C
173 lines
7.6 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://github.com/behlendorf/spl/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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\*****************************************************************************/
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#ifndef _SPL_KSTAT_H
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#define _SPL_KSTAT_H
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#include <linux/module.h>
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#include <linux/proc_compat.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/kmem.h>
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#define KSTAT_STRLEN 31
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/* For reference valid classes are:
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* disk, tape, net, controller, vm, kvm, hat, streams, kstat, misc
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*/
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#define KSTAT_TYPE_RAW 0 /* can be anything; ks_ndata >= 1 */
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#define KSTAT_TYPE_NAMED 1 /* name/value pair; ks_ndata >= 1 */
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#define KSTAT_TYPE_INTR 2 /* interrupt stats; ks_ndata == 1 */
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#define KSTAT_TYPE_IO 3 /* I/O stats; ks_ndata == 1 */
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#define KSTAT_TYPE_TIMER 4 /* event timer; ks_ndata >= 1 */
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#define KSTAT_NUM_TYPES 5
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#define KSTAT_DATA_CHAR 0
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#define KSTAT_DATA_INT32 1
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#define KSTAT_DATA_UINT32 2
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#define KSTAT_DATA_INT64 3
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#define KSTAT_DATA_UINT64 4
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#define KSTAT_DATA_LONG 5
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#define KSTAT_DATA_ULONG 6
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#define KSTAT_DATA_STRING 7
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#define KSTAT_NUM_DATAS 8
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#define KSTAT_INTR_HARD 0
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#define KSTAT_INTR_SOFT 1
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#define KSTAT_INTR_WATCHDOG 2
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#define KSTAT_INTR_SPURIOUS 3
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#define KSTAT_INTR_MULTSVC 4
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#define KSTAT_NUM_INTRS 5
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#define KSTAT_FLAG_VIRTUAL 0x01
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#define KSTAT_FLAG_VAR_SIZE 0x02
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#define KSTAT_FLAG_WRITABLE 0x04
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#define KSTAT_FLAG_PERSISTENT 0x08
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#define KSTAT_FLAG_DORMANT 0x10
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#define KSTAT_FLAG_UNSUPPORTED (KSTAT_FLAG_VAR_SIZE | KSTAT_FLAG_WRITABLE | \
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KSTAT_FLAG_PERSISTENT | KSTAT_FLAG_DORMANT)
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#define KS_MAGIC 0x9d9d9d9d
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/* Dynamic updates */
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#define KSTAT_READ 0
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#define KSTAT_WRITE 1
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struct kstat_s;
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typedef int kid_t; /* unique kstat id */
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typedef int kstat_update_t(struct kstat_s *, int); /* dynamic update cb */
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typedef struct kstat_s {
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int ks_magic; /* magic value */
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kid_t ks_kid; /* unique kstat ID */
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hrtime_t ks_crtime; /* creation time */
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hrtime_t ks_snaptime; /* last access time */
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char ks_module[KSTAT_STRLEN+1]; /* provider module name */
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int ks_instance; /* provider module instance */
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char ks_name[KSTAT_STRLEN+1]; /* kstat name */
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char ks_class[KSTAT_STRLEN+1]; /* kstat class */
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uchar_t ks_type; /* kstat data type */
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uchar_t ks_flags; /* kstat flags */
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void *ks_data; /* kstat type-specific data */
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uint_t ks_ndata; /* # of type-specific data records */
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size_t ks_data_size; /* size of kstat data section */
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struct proc_dir_entry *ks_proc; /* proc linkage */
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kstat_update_t *ks_update; /* dynamic updates */
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void *ks_private; /* private data */
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spinlock_t ks_lock; /* kstat data lock */
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struct list_head ks_list; /* kstat linkage */
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} kstat_t;
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typedef struct kstat_named_s {
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char name[KSTAT_STRLEN]; /* name of counter */
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uchar_t data_type; /* data type */
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union {
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char c[16]; /* 128-bit int */
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int32_t i32; /* 32-bit signed int */
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uint32_t ui32; /* 32-bit unsigned int */
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int64_t i64; /* 64-bit signed int */
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uint64_t ui64; /* 64-bit unsigned int */
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long l; /* native signed long */
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ulong_t ul; /* native unsigned long */
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struct {
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union {
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char *ptr; /* NULL-term string */
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char __pad[8]; /* 64-bit padding */
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} addr;
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uint32_t len; /* # bytes for strlen + '\0' */
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} string;
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} value;
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} kstat_named_t;
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#define KSTAT_NAMED_STR_PTR(knptr) ((knptr)->value.string.addr.ptr)
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#define KSTAT_NAMED_STR_BUFLEN(knptr) ((knptr)->value.string.len)
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typedef struct kstat_intr {
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uint_t intrs[KSTAT_NUM_INTRS];
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} kstat_intr_t;
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typedef struct kstat_io {
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u_longlong_t nread; /* number of bytes read */
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u_longlong_t nwritten; /* number of bytes written */
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uint_t reads; /* number of read operations */
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uint_t writes; /* number of write operations */
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hrtime_t wtime; /* cumulative wait (pre-service) time */
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hrtime_t wlentime; /* cumulative wait length*time product*/
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hrtime_t wlastupdate; /* last time wait queue changed */
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hrtime_t rtime; /* cumulative run (service) time */
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hrtime_t rlentime; /* cumulative run length*time product */
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hrtime_t rlastupdate; /* last time run queue changed */
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uint_t wcnt; /* count of elements in wait state */
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uint_t rcnt; /* count of elements in run state */
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} kstat_io_t;
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typedef struct kstat_timer {
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char name[KSTAT_STRLEN+1]; /* event name */
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u_longlong_t num_events; /* number of events */
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hrtime_t elapsed_time; /* cumulative elapsed time */
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hrtime_t min_time; /* shortest event duration */
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hrtime_t max_time; /* longest event duration */
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hrtime_t start_time; /* previous event start time */
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hrtime_t stop_time; /* previous event stop time */
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} kstat_timer_t;
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int spl_kstat_init(void);
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void spl_kstat_fini(void);
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extern kstat_t *__kstat_create(const char *ks_module, int ks_instance,
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const char *ks_name, const char *ks_class,
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uchar_t ks_type, uint_t ks_ndata,
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uchar_t ks_flags);
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extern void __kstat_install(kstat_t *ksp);
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extern void __kstat_delete(kstat_t *ksp);
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#define kstat_create(m,i,n,c,t,s,f) __kstat_create(m,i,n,c,t,s,f)
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#define kstat_install(k) __kstat_install(k)
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#define kstat_delete(k) __kstat_delete(k)
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#endif /* _SPL_KSTAT_H */
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