-#ifndef _SPL_KSTAT_H
-#define _SPL_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/>.
+\*****************************************************************************/
-#ifdef __cplusplus
-extern "C" {
-#endif
+#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>
-/* XXX - The minimum functionality here is stubbed out but nothing works. */
-
-#define KSTAT_STRLEN 31 /* 30 chars + NULL; must be 16 * n - 1 */
-
-#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 statistics */
- /* ks_ndata == 1 */
-#define KSTAT_TYPE_IO 3 /* I/O statistics */
- /* ks_ndata == 1 */
-#define KSTAT_TYPE_TIMER 4 /* event timer */
- /* ks_ndata >= 1 */
-
-#define KSTAT_NUM_TYPES 5
-
-
-#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_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_INVALID 0x2
-
-
-typedef int kid_t; /* unique kstat id */
-
-typedef struct kstat_s {
- /*
- * Fields relevant to both kernel and user
- */
- hrtime_t ks_crtime; /* creation time (from gethrtime()) */
- struct kstat_s *ks_next; /* kstat chain linkage */
- kid_t ks_kid; /* unique kstat ID */
- char ks_module[KSTAT_STRLEN]; /* provider module name */
- uchar_t ks_resv; /* reserved, currently just padding */
- int ks_instance; /* provider module's instance */
- char ks_name[KSTAT_STRLEN]; /* kstat name */
- uchar_t ks_type; /* kstat data type */
- char ks_class[KSTAT_STRLEN]; /* kstat class */
- 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; /* total size of kstat data section */
- hrtime_t ks_snaptime; /* time of last data shapshot */
- /*
- * Fields relevant to kernel only
- */
- int (*ks_update)(struct kstat *, int); /* dynamic update */
- void *ks_private; /* arbitrary provider-private data */
- int (*ks_snapshot)(struct kstat *, void *, int);
- void *ks_lock; /* protects this kstat's data */
-} kstat_t;
+#define KSTAT_STRLEN 255
+#define KSTAT_RAW_MAX (128*1024)
-typedef struct kstat_named_s {
- char name[KSTAT_STRLEN]; /* name of counter */
- uchar_t data_type; /* data type */
- union {
- char c[16]; /* enough for 128-bit ints */
- int32_t i32;
- uint32_t ui32;
- struct {
- union {
- char *ptr; /* NULL-term string */
- char __pad[8]; /* 64-bit padding */
- } addr;
- uint32_t len; /* # bytes for strlen + '\0' */
- } str;
/*
- * The int64_t and uint64_t types are not valid for a maximally conformant
- * 32-bit compilation environment (cc -Xc) using compilers prior to the
- * introduction of C99 conforming compiler (reference ISO/IEC 9899:1990).
- * In these cases, the visibility of i64 and ui64 is only permitted for
- * 64-bit compilation environments or 32-bit non-maximally conformant
- * C89 or C90 ANSI C compilation environments (cc -Xt and cc -Xa). In the
- * C99 ANSI C compilation environment, the long long type is supported.
- * The _INT64_TYPE is defined by the implementation (see sys/int_types.h).
+ * For reference valid classes are:
+ * disk, tape, net, controller, vm, kvm, hat, streams, kstat, misc
*/
- int64_t i64;
- uint64_t ui64;
- long l;
- ulong_t ul;
-
- /* These structure members are obsolete */
-
- longlong_t ll;
- u_longlong_t ull;
- float f;
- double d;
- } value; /* value of counter */
-} kstat_named_t;
+#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_NUM_TYPES 5
+
+#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 struct kstat_s kstat_t;
+
+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_raw_ops {
+ int (*headers)(char *buf, size_t size);
+ int (*data)(char *buf, size_t size, void *data);
+ void *(*addr)(kstat_t *ksp, loff_t index);
+} kstat_raw_ops_t;
+
+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 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_private_lock; /* kstat private data lock */
+ kmutex_t *ks_lock; /* kstat data lock */
+ struct list_head ks_list; /* kstat linkage */
+ kstat_module_t *ks_owner; /* kstat module linkage */
+ kstat_raw_ops_t ks_raw_ops; /* ops table for raw type */
+ char *ks_raw_buf; /* buf used for raw ops */
+ size_t ks_raw_bufsize; /* size of raw ops buffer */
+};
-static __inline__ 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)
-{
- return NULL;
-}
-
-static __inline__ void
-kstat_install(kstat_t *ksp)
-{
- return;
-}
-
-static __inline__ void
-kstat_delete(kstat_t *ksp)
-{
- return;
-}
-
-/* FIXME - NONE OF THIS IS ATOMIC, IT SHOULD BE. For the moment this is
- * OK since it is only used for the noncritical kstat counters, and we
- * are only doing testing on x86_86 platform where the entire counter
- * will be updated with one instruction. */
-static __inline__ void
-atomic_inc_64(volatile uint64_t *target)
-{
- (*target)++;
-}
-
-static __inline__ void
-atomic_dec_64(volatile uint64_t *target)
-{
- (*target)--;
-}
-
-static __inline__ uint64_t
-atomic_add_64(volatile uint64_t *target, uint64_t delta)
-{
- uint64_t rc = *target;
- *target += delta;
- return rc;
-}
-
-static __inline__ uint64_t
-atomic_add_64_nv(volatile uint64_t *target, uint64_t delta)
-{
- *target += delta;
- return *target;
-}
-
-static __inline__ uint64_t
-atomic_cas_64(volatile uint64_t *target, uint64_t cmp,
- uint64_t newval)
-{
- uint64_t rc = *target;
-
- if (*target == cmp)
- *target = newval;
-
- return rc;
-}
-
-#ifdef __cplusplus
-}
-#endif
+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;
-#endif /* _SPL_KSTAT_H */
+#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 len*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;
+
+int spl_kstat_init(void);
+void spl_kstat_fini(void);
+
+extern void __kstat_set_raw_ops(kstat_t *ksp,
+ int (*headers)(char *buf, size_t size),
+ int (*data)(char *buf, size_t size, void *data),
+ void* (*addr)(kstat_t *ksp, loff_t index));
+
+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);
+extern void kstat_waitq_enter(kstat_io_t *);
+extern void kstat_waitq_exit(kstat_io_t *);
+extern void kstat_runq_enter(kstat_io_t *);
+extern void kstat_runq_exit(kstat_io_t *);
+
+#define kstat_set_raw_ops(k, h, d, a) \
+ __kstat_set_raw_ops(k, h, d, a)
+#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 */
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