[mirror_spl.git] / module / spl / spl-kstat.c

/*****************************************************************************\
 *  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://github.com/behlendorf/spl/>.
 *
 *  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/>.
 *****************************************************************************
 *  Solaris Porting Layer (SPL) Kstat Implementation.
\*****************************************************************************/

#include <linux/seq_file.h>
#include <sys/kstat.h>
#include <spl-debug.h>

#ifdef SS_DEBUG_SUBSYS
#undef SS_DEBUG_SUBSYS
#endif

#define SS_DEBUG_SUBSYS SS_KSTAT

static spinlock_t kstat_lock;
static struct list_head kstat_list;
static kid_t kstat_id;

static void
kstat_seq_show_headers(struct seq_file *f)
{
        kstat_t *ksp = (kstat_t *)f->private;
        ASSERT(ksp->ks_magic == KS_MAGIC);

        seq_printf(f, "%d %d 0x%02x %d %d %lld %lld\n",
		   ksp->ks_kid, ksp->ks_type, ksp->ks_flags,
		   ksp->ks_ndata, (int)ksp->ks_data_size,
		   ksp->ks_crtime, ksp->ks_snaptime);

	switch (ksp->ks_type) {
                case KSTAT_TYPE_RAW:
                        seq_printf(f, "raw data");
                        break;
                case KSTAT_TYPE_NAMED:
                        seq_printf(f, "%-31s %-4s %s\n",
                                   "name", "type", "data");
                        break;
                case KSTAT_TYPE_INTR:
                        seq_printf(f, "%-8s %-8s %-8s %-8s %-8s\n",
                                   "hard", "soft", "watchdog",
                                   "spurious", "multsvc");
                        break;
                case KSTAT_TYPE_IO:
                        seq_printf(f,
                                   "%-8s %-8s %-8s %-8s %-8s %-8s "
                                   "%-8s %-8s %-8s %-8s %-8s %-8s\n",
                                   "nread", "nwritten", "reads", "writes",
                                   "wtime", "wlentime", "wupdate",
                                   "rtime", "rlentime", "rupdate",
                                   "wcnt", "rcnt");
                        break;
                case KSTAT_TYPE_TIMER:
                        seq_printf(f,
                                   "%-31s %-8s "
                                   "%-8s %-8s %-8s %-8s %-8s\n",
                                   "name", "events", "elapsed",
                                   "min", "max", "start", "stop");
                        break;
                case KSTAT_TYPE_TXG:
                        seq_printf(f,
                                   "%-8s %-5s %-13s %-12s %-12s %-8s %-8s "
                                   "%-12s %-12s %-12s\n",
                                   "txg", "state", "birth",
                                   "nread", "nwritten", "reads", "writes",
                                   "otime", "qtime", "stime");
                        break;
                default:
                        PANIC("Undefined kstat type %d\n", ksp->ks_type);
        }
}

static int
kstat_seq_show_raw(struct seq_file *f, unsigned char *p, int l)
{
        int i, j;

        for (i = 0; ; i++) {
                seq_printf(f, "%03x:", i);

                for (j = 0; j < 16; j++) {
                        if (i * 16 + j >= l) {
                                seq_printf(f, "\n");
                                goto out;
                        }

                        seq_printf(f, " %02x", (unsigned char)p[i * 16 + j]);
                }
                seq_printf(f, "\n");
        }
out:
        return 0;
}

static int
kstat_seq_show_named(struct seq_file *f, kstat_named_t *knp)
{
        seq_printf(f, "%-31s %-4d ", knp->name, knp->data_type);

        switch (knp->data_type) {
                case KSTAT_DATA_CHAR:
                        knp->value.c[15] = '\0'; /* NULL terminate */
                        seq_printf(f, "%-16s", knp->value.c);
                        break;
                /* XXX - We need to be more careful able what tokens are
                 * used for each arch, for now this is correct for x86_64.
                 */
                case KSTAT_DATA_INT32:
                        seq_printf(f, "%d", knp->value.i32);
                        break;
                case KSTAT_DATA_UINT32:
                        seq_printf(f, "%u", knp->value.ui32);
                        break;
                case KSTAT_DATA_INT64:
                        seq_printf(f, "%lld", (signed long long)knp->value.i64);
                        break;
                case KSTAT_DATA_UINT64:
                        seq_printf(f, "%llu", (unsigned long long)knp->value.ui64);
                        break;
                case KSTAT_DATA_LONG:
                        seq_printf(f, "%ld", knp->value.l);
                        break;
                case KSTAT_DATA_ULONG:
                        seq_printf(f, "%lu", knp->value.ul);
                        break;
                case KSTAT_DATA_STRING:
                        KSTAT_NAMED_STR_PTR(knp)
                                [KSTAT_NAMED_STR_BUFLEN(knp)-1] = '\0';
                        seq_printf(f, "%s", KSTAT_NAMED_STR_PTR(knp));
                        break;
                default:
                        PANIC("Undefined kstat data type %d\n", knp->data_type);
        }

        seq_printf(f, "\n");

        return 0;
}

static int
kstat_seq_show_intr(struct seq_file *f, kstat_intr_t *kip)
{
        seq_printf(f, "%-8u %-8u %-8u %-8u %-8u\n",
                   kip->intrs[KSTAT_INTR_HARD],
                   kip->intrs[KSTAT_INTR_SOFT],
                   kip->intrs[KSTAT_INTR_WATCHDOG],
                   kip->intrs[KSTAT_INTR_SPURIOUS],
                   kip->intrs[KSTAT_INTR_MULTSVC]);

        return 0;
}

static int
kstat_seq_show_io(struct seq_file *f, kstat_io_t *kip)
{
        seq_printf(f,
                   "%-8llu %-8llu %-8u %-8u %-8lld %-8lld "
                   "%-8lld %-8lld %-8lld %-8lld %-8u %-8u\n",
                   kip->nread, kip->nwritten,
                   kip->reads, kip->writes,
                   kip->wtime, kip->wlentime, kip->wlastupdate,
                   kip->rtime, kip->wlentime, kip->rlastupdate,
                   kip->wcnt,  kip->rcnt);

        return 0;
}

static int
kstat_seq_show_timer(struct seq_file *f, kstat_timer_t *ktp)
{
        seq_printf(f,
                   "%-31s %-8llu %-8lld %-8lld %-8lld %-8lld %-8lld\n",
                   ktp->name, ktp->num_events, ktp->elapsed_time,
                   ktp->min_time, ktp->max_time,
                   ktp->start_time, ktp->stop_time);

        return 0;
}

static int
kstat_seq_show_txg(struct seq_file *f, kstat_txg_t *ktp)
{
	char state;

	switch (ktp->state) {
		case TXG_STATE_OPEN:		state = 'O';	break;
		case TXG_STATE_QUIESCING:	state = 'Q';	break;
		case TXG_STATE_SYNCING:		state = 'S';	break;
		case TXG_STATE_COMMITTED:	state = 'C';	break;
		default:			state = '?';	break;
	}

        seq_printf(f,
                   "%-8llu %-5c %-13llu %-12llu %-12llu %-8u %-8u "
                   "%12lld %12lld %12lld\n", ktp->txg, state, ktp->birth,
                    ktp->nread, ktp->nwritten, ktp->reads, ktp->writes,
                    ktp->open_time, ktp->quiesce_time, ktp->sync_time);
	return 0;
}

static int
kstat_seq_show(struct seq_file *f, void *p)
{
        kstat_t *ksp = (kstat_t *)f->private;
        int rc = 0;

        ASSERT(ksp->ks_magic == KS_MAGIC);

	switch (ksp->ks_type) {
                case KSTAT_TYPE_RAW:
                        ASSERT(ksp->ks_ndata == 1);
                        rc = kstat_seq_show_raw(f, ksp->ks_data,
                                                ksp->ks_data_size);
                        break;
                case KSTAT_TYPE_NAMED:
                        rc = kstat_seq_show_named(f, (kstat_named_t *)p);
                        break;
                case KSTAT_TYPE_INTR:
                        rc = kstat_seq_show_intr(f, (kstat_intr_t *)p);
                        break;
                case KSTAT_TYPE_IO:
                        rc = kstat_seq_show_io(f, (kstat_io_t *)p);
                        break;
                case KSTAT_TYPE_TIMER:
                        rc = kstat_seq_show_timer(f, (kstat_timer_t *)p);
                        break;
                case KSTAT_TYPE_TXG:
                        rc = kstat_seq_show_txg(f, (kstat_txg_t *)p);
                        break;
                default:
                        PANIC("Undefined kstat type %d\n", ksp->ks_type);
        }

        return rc;
}

int
kstat_default_update(kstat_t *ksp, int rw)
{
	ASSERT(ksp != NULL);
	return 0;
}

static void *
kstat_seq_data_addr(kstat_t *ksp, loff_t n)
{
        void *rc = NULL;
        SENTRY;

	switch (ksp->ks_type) {
                case KSTAT_TYPE_RAW:
	                rc = ksp->ks_data;
                        break;
                case KSTAT_TYPE_NAMED:
                        rc = ksp->ks_data + n * sizeof(kstat_named_t);
                        break;
                case KSTAT_TYPE_INTR:
                        rc = ksp->ks_data + n * sizeof(kstat_intr_t);
                        break;
                case KSTAT_TYPE_IO:
                        rc = ksp->ks_data + n * sizeof(kstat_io_t);
                        break;
                case KSTAT_TYPE_TIMER:
                        rc = ksp->ks_data + n * sizeof(kstat_timer_t);
                        break;
                case KSTAT_TYPE_TXG:
                        rc = ksp->ks_data + n * sizeof(kstat_txg_t);
                        break;
                default:
                        PANIC("Undefined kstat type %d\n", ksp->ks_type);
        }

        SRETURN(rc);
}

static void *
kstat_seq_start(struct seq_file *f, loff_t *pos)
{
        loff_t n = *pos;
        kstat_t *ksp = (kstat_t *)f->private;
        ASSERT(ksp->ks_magic == KS_MAGIC);
        SENTRY;

        mutex_enter(&ksp->ks_lock);

        /* Dynamically update kstat, on error existing kstats are used */
        (void) ksp->ks_update(ksp, KSTAT_READ);

	ksp->ks_snaptime = gethrtime();

        if (!n)
                kstat_seq_show_headers(f);

        if (n >= ksp->ks_ndata)
                SRETURN(NULL);

        SRETURN(kstat_seq_data_addr(ksp, n));
}

static void *
kstat_seq_next(struct seq_file *f, void *p, loff_t *pos)
{
        kstat_t *ksp = (kstat_t *)f->private;
        ASSERT(ksp->ks_magic == KS_MAGIC);
        SENTRY;

        ++*pos;
        if (*pos >= ksp->ks_ndata)
                SRETURN(NULL);

        SRETURN(kstat_seq_data_addr(ksp, *pos));
}

static void
kstat_seq_stop(struct seq_file *f, void *v)
{
        kstat_t *ksp = (kstat_t *)f->private;
        ASSERT(ksp->ks_magic == KS_MAGIC);

        mutex_exit(&ksp->ks_lock);
}

static struct seq_operations kstat_seq_ops = {
        .show  = kstat_seq_show,
        .start = kstat_seq_start,
        .next  = kstat_seq_next,
        .stop  = kstat_seq_stop,
};

static int
proc_kstat_open(struct inode *inode, struct file *filp)
{
        struct seq_file *f;
        int rc;

        rc = seq_open(filp, &kstat_seq_ops);
        if (rc)
                return rc;

        f = filp->private_data;
        f->private = PDE(inode)->data;

        return rc;
}

static struct file_operations proc_kstat_operations = {
        .open           = proc_kstat_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = seq_release,
};

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)
{
	kstat_t *ksp;

	ASSERT(ks_module);
	ASSERT(ks_instance == 0);
	ASSERT(ks_name);
	ASSERT(!(ks_flags & KSTAT_FLAG_UNSUPPORTED));

	if ((ks_type == KSTAT_TYPE_INTR) || (ks_type == KSTAT_TYPE_IO))
                ASSERT(ks_ndata == 1);

	ksp = kmem_zalloc(sizeof(*ksp), KM_SLEEP);
	if (ksp == NULL)
		return ksp;

	spin_lock(&kstat_lock);
	ksp->ks_kid = kstat_id;
        kstat_id++;
	spin_unlock(&kstat_lock);

        ksp->ks_magic = KS_MAGIC;
	mutex_init(&ksp->ks_lock, NULL, MUTEX_DEFAULT, NULL);
	INIT_LIST_HEAD(&ksp->ks_list);

	ksp->ks_crtime = gethrtime();
        ksp->ks_snaptime = ksp->ks_crtime;
	strncpy(ksp->ks_module, ks_module, KSTAT_STRLEN);
	ksp->ks_instance = ks_instance;
	strncpy(ksp->ks_name, ks_name, KSTAT_STRLEN);
	strncpy(ksp->ks_class, ks_class, KSTAT_STRLEN);
	ksp->ks_type = ks_type;
	ksp->ks_flags = ks_flags;
	ksp->ks_update = kstat_default_update;
	ksp->ks_private = NULL;

	switch (ksp->ks_type) {
                case KSTAT_TYPE_RAW:
	                ksp->ks_ndata = 1;
                        ksp->ks_data_size = ks_ndata;
                        break;
                case KSTAT_TYPE_NAMED:
	                ksp->ks_ndata = ks_ndata;
                        ksp->ks_data_size = ks_ndata * sizeof(kstat_named_t);
                        break;
                case KSTAT_TYPE_INTR:
	                ksp->ks_ndata = ks_ndata;
                        ksp->ks_data_size = ks_ndata * sizeof(kstat_intr_t);
                        break;
                case KSTAT_TYPE_IO:
	                ksp->ks_ndata = ks_ndata;
                        ksp->ks_data_size = ks_ndata * sizeof(kstat_io_t);
                        break;
                case KSTAT_TYPE_TIMER:
	                ksp->ks_ndata = ks_ndata;
                        ksp->ks_data_size = ks_ndata * sizeof(kstat_timer_t);
                        break;
		case KSTAT_TYPE_TXG:
			ksp->ks_ndata = ks_ndata;
			ksp->ks_data_size = ks_ndata * sizeof(kstat_timer_t);
			break;
                default:
                        PANIC("Undefined kstat type %d\n", ksp->ks_type);
        }

	if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) {
                ksp->ks_data = NULL;
        } else {
                ksp->ks_data = kmem_alloc(ksp->ks_data_size, KM_SLEEP);
                if (ksp->ks_data == NULL) {
                        kmem_free(ksp, sizeof(*ksp));
                        ksp = NULL;
                }
        }

	return ksp;
}
EXPORT_SYMBOL(__kstat_create);

void
__kstat_install(kstat_t *ksp)
{
	struct proc_dir_entry *de_module, *de_name;
	kstat_t *tmp;
	int rc = 0;
	SENTRY;

	spin_lock(&kstat_lock);

	/* Item may only be added to the list once */
        list_for_each_entry(tmp, &kstat_list, ks_list) {
                if (tmp == ksp) {
		        spin_unlock(&kstat_lock);
			SGOTO(out, rc = -EEXIST);
		}
	}

        list_add_tail(&ksp->ks_list, &kstat_list);
	spin_unlock(&kstat_lock);

	de_module = proc_dir_entry_find(proc_spl_kstat, ksp->ks_module);
	if (de_module == NULL) {
                de_module = proc_mkdir(ksp->ks_module, proc_spl_kstat);
		if (de_module == NULL)
			SGOTO(out, rc = -EUNATCH);
	}

	de_name = create_proc_entry(ksp->ks_name, 0444, de_module);
	if (de_name == NULL)
		SGOTO(out, rc = -EUNATCH);

	mutex_enter(&ksp->ks_lock);
	ksp->ks_proc = de_name;
	de_name->proc_fops = &proc_kstat_operations;
        de_name->data = (void *)ksp;
	mutex_exit(&ksp->ks_lock);
out:
	if (rc) {
		spin_lock(&kstat_lock);
	        list_del_init(&ksp->ks_list);
		spin_unlock(&kstat_lock);
	}

	SEXIT;
}
EXPORT_SYMBOL(__kstat_install);

void
__kstat_delete(kstat_t *ksp)
{
	struct proc_dir_entry *de_module;

	spin_lock(&kstat_lock);
        list_del_init(&ksp->ks_list);
	spin_unlock(&kstat_lock);

        if (ksp->ks_proc) {
	        de_module = ksp->ks_proc->parent;
	        remove_proc_entry(ksp->ks_name, de_module);

	        /* Remove top level module directory if it's empty */
	        if (proc_dir_entries(de_module) == 0)
		        remove_proc_entry(de_module->name, de_module->parent);
	}

	if (!(ksp->ks_flags & KSTAT_FLAG_VIRTUAL))
                kmem_free(ksp->ks_data, ksp->ks_data_size);

	mutex_destroy(&ksp->ks_lock);
	kmem_free(ksp, sizeof(*ksp));

	return;
}
EXPORT_SYMBOL(__kstat_delete);

int
spl_kstat_init(void)
{
	SENTRY;
	spin_lock_init(&kstat_lock);
	INIT_LIST_HEAD(&kstat_list);
        kstat_id = 0;
	SRETURN(0);
}

void
spl_kstat_fini(void)
{
	SENTRY;
	ASSERT(list_empty(&kstat_list));
	SEXIT;
}
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	6	* UCRL-CODE-235197
715f6251	7	*
716154c5 BB	8	* This file is part of the SPL, Solaris Porting Layer.
	9	* For details, see <http://github.com/behlendorf/spl/>.
	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	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/>.
	23	*****************************************************************************
	24	* Solaris Porting Layer (SPL) Kstat Implementation.
	25	\*****************************************************************************/
715f6251	26
ae4c36ad	27	#include <linux/seq_file.h>
55abb092 BB	28	#include <sys/kstat.h>
55abb092 BB	29	#include <spl-debug.h>
04a479f7	30
b17edc10 BB	31	#ifdef SS_DEBUG_SUBSYS
	32	#undef SS_DEBUG_SUBSYS
	33	#endif
	34
	35	#define SS_DEBUG_SUBSYS SS_KSTAT
	36
04a479f7	37	static spinlock_t kstat_lock;
	38	static struct list_head kstat_list;
	39	static kid_t kstat_id;
	40
	41	static void
	42	kstat_seq_show_headers(struct seq_file *f)
	43	{
	44	kstat_t ksp = (kstat_t )f->private;
	45	ASSERT(ksp->ks_magic == KS_MAGIC);
	46
	47	seq_printf(f, "%d %d 0x%02x %d %d %lld %lld\n",
	48	ksp->ks_kid, ksp->ks_type, ksp->ks_flags,
	49	ksp->ks_ndata, (int)ksp->ks_data_size,
	50	ksp->ks_crtime, ksp->ks_snaptime);
	51
	52	switch (ksp->ks_type) {
	53	case KSTAT_TYPE_RAW:
	54	seq_printf(f, "raw data");
	55	break;
	56	case KSTAT_TYPE_NAMED:
	57	seq_printf(f, "%-31s %-4s %s\n",
	58	"name", "type", "data");
	59	break;
	60	case KSTAT_TYPE_INTR:
	61	seq_printf(f, "%-8s %-8s %-8s %-8s %-8s\n",
	62	"hard", "soft", "watchdog",
	63	"spurious", "multsvc");
	64	break;
	65	case KSTAT_TYPE_IO:
	66	seq_printf(f,
	67	"%-8s %-8s %-8s %-8s %-8s %-8s "
	68	"%-8s %-8s %-8s %-8s %-8s %-8s\n",
	69	"nread", "nwritten", "reads", "writes",
	70	"wtime", "wlentime", "wupdate",
	71	"rtime", "rlentime", "rupdate",
	72	"wcnt", "rcnt");
	73	break;
	74	case KSTAT_TYPE_TIMER:
	75	seq_printf(f,
	76	"%-31s %-8s "
	77	"%-8s %-8s %-8s %-8s %-8s\n",
	78	"name", "events", "elapsed",
	79	"min", "max", "start", "stop");
	80	break;
dba79fcb BB	81	case KSTAT_TYPE_TXG:
	82	seq_printf(f,
	83	"%-8s %-5s %-13s %-12s %-12s %-8s %-8s "
	84	"%-12s %-12s %-12s\n",
	85	"txg", "state", "birth",
	86	"nread", "nwritten", "reads", "writes",
	87	"otime", "qtime", "stime");
	88	break;
04a479f7	89	default:
55abb092	90	PANIC("Undefined kstat type %d\n", ksp->ks_type);
04a479f7	91	}
	92	}
	93
	94	static int
	95	kstat_seq_show_raw(struct seq_file f, unsigned char p, int l)
	96	{
	97	int i, j;
	98
	99	for (i = 0; ; i++) {
	100	seq_printf(f, "%03x:", i);
	101
	102	for (j = 0; j < 16; j++) {
	103	if (i * 16 + j >= l) {
	104	seq_printf(f, "\n");
	105	goto out;
	106	}
	107
	108	seq_printf(f, " %02x", (unsigned char)p[i * 16 + j]);
	109	}
	110	seq_printf(f, "\n");
	111	}
	112	out:
	113	return 0;
	114	}
	115
	116	static int
	117	kstat_seq_show_named(struct seq_file f, kstat_named_t knp)
	118	{
	119	seq_printf(f, "%-31s %-4d ", knp->name, knp->data_type);
	120
	121	switch (knp->data_type) {
	122	case KSTAT_DATA_CHAR:
	123	knp->value.c[15] = '\0'; /* NULL terminate */
	124	seq_printf(f, "%-16s", knp->value.c);
	125	break;
	126	/* XXX - We need to be more careful able what tokens are
	127	* used for each arch, for now this is correct for x86_64.
	128	*/
	129	case KSTAT_DATA_INT32:
	130	seq_printf(f, "%d", knp->value.i32);
	131	break;
	132	case KSTAT_DATA_UINT32:
	133	seq_printf(f, "%u", knp->value.ui32);
	134	break;
	135	case KSTAT_DATA_INT64:
cfe57499	136	seq_printf(f, "%lld", (signed long long)knp->value.i64);
04a479f7	137	break;
04a479f7	138	case KSTAT_DATA_UINT64:
cfe57499	139	seq_printf(f, "%llu", (unsigned long long)knp->value.ui64);
04a479f7	140	break;
	141	case KSTAT_DATA_LONG:
	142	seq_printf(f, "%ld", knp->value.l);
	143	break;
	144	case KSTAT_DATA_ULONG:
cfe57499	145	seq_printf(f, "%lu", knp->value.ul);
04a479f7	146	break;
	147	case KSTAT_DATA_STRING:
	148	KSTAT_NAMED_STR_PTR(knp)
	149	[KSTAT_NAMED_STR_BUFLEN(knp)-1] = '\0';
	150	seq_printf(f, "%s", KSTAT_NAMED_STR_PTR(knp));
	151	break;
	152	default:
55abb092	153	PANIC("Undefined kstat data type %d\n", knp->data_type);
04a479f7	154	}
	155
	156	seq_printf(f, "\n");
	157
	158	return 0;
	159	}
	160
	161	static int
	162	kstat_seq_show_intr(struct seq_file f, kstat_intr_t kip)
	163	{
	164	seq_printf(f, "%-8u %-8u %-8u %-8u %-8u\n",
	165	kip->intrs[KSTAT_INTR_HARD],
	166	kip->intrs[KSTAT_INTR_SOFT],
	167	kip->intrs[KSTAT_INTR_WATCHDOG],
	168	kip->intrs[KSTAT_INTR_SPURIOUS],
	169	kip->intrs[KSTAT_INTR_MULTSVC]);
	170
	171	return 0;
	172	}
	173
	174	static int
	175	kstat_seq_show_io(struct seq_file f, kstat_io_t kip)
	176	{
	177	seq_printf(f,
	178	"%-8llu %-8llu %-8u %-8u %-8lld %-8lld "
	179	"%-8lld %-8lld %-8lld %-8lld %-8u %-8u\n",
	180	kip->nread, kip->nwritten,
	181	kip->reads, kip->writes,
	182	kip->wtime, kip->wlentime, kip->wlastupdate,
	183	kip->rtime, kip->wlentime, kip->rlastupdate,
	184	kip->wcnt, kip->rcnt);
	185
	186	return 0;
	187	}
	188
	189	static int
	190	kstat_seq_show_timer(struct seq_file f, kstat_timer_t ktp)
	191	{
	192	seq_printf(f,
	193	"%-31s %-8llu %-8lld %-8lld %-8lld %-8lld %-8lld\n",
	194	ktp->name, ktp->num_events, ktp->elapsed_time,
	195	ktp->min_time, ktp->max_time,
	196	ktp->start_time, ktp->stop_time);
	197
	198	return 0;
	199	}
	200
dba79fcb BB	201	static int
	202	kstat_seq_show_txg(struct seq_file f, kstat_txg_t ktp)
	203	{
	204	char state;
	205
	206	switch (ktp->state) {
	207	case TXG_STATE_OPEN: state = 'O'; break;
	208	case TXG_STATE_QUIESCING: state = 'Q'; break;
	209	case TXG_STATE_SYNCING: state = 'S'; break;
	210	case TXG_STATE_COMMITTED: state = 'C'; break;
	211	default: state = '?'; break;
	212	}
	213
	214	seq_printf(f,
	215	"%-8llu %-5c %-13llu %-12llu %-12llu %-8u %-8u "
	216	"%12lld %12lld %12lld\n", ktp->txg, state, ktp->birth,
	217	ktp->nread, ktp->nwritten, ktp->reads, ktp->writes,
	218	ktp->open_time, ktp->quiesce_time, ktp->sync_time);
	219	return 0;
	220	}
	221
04a479f7	222	static int
	223	kstat_seq_show(struct seq_file f, void p)
	224	{
	225	kstat_t ksp = (kstat_t )f->private;
	226	int rc = 0;
	227
	228	ASSERT(ksp->ks_magic == KS_MAGIC);
	229
	230	switch (ksp->ks_type) {
	231	case KSTAT_TYPE_RAW:
	232	ASSERT(ksp->ks_ndata == 1);
	233	rc = kstat_seq_show_raw(f, ksp->ks_data,
	234	ksp->ks_data_size);
	235	break;
	236	case KSTAT_TYPE_NAMED:
	237	rc = kstat_seq_show_named(f, (kstat_named_t *)p);
	238	break;
	239	case KSTAT_TYPE_INTR:
	240	rc = kstat_seq_show_intr(f, (kstat_intr_t *)p);
	241	break;
	242	case KSTAT_TYPE_IO:
	243	rc = kstat_seq_show_io(f, (kstat_io_t *)p);
	244	break;
	245	case KSTAT_TYPE_TIMER:
	246	rc = kstat_seq_show_timer(f, (kstat_timer_t *)p);
	247	break;
dba79fcb BB	248	case KSTAT_TYPE_TXG:
	249	rc = kstat_seq_show_txg(f, (kstat_txg_t *)p);
	250	break;
04a479f7	251	default:
55abb092	252	PANIC("Undefined kstat type %d\n", ksp->ks_type);
04a479f7	253	}
	254
	255	return rc;
	256	}
	257
9a8b7a74 BB	258	int
	259	kstat_default_update(kstat_t *ksp, int rw)
	260	{
	261	ASSERT(ksp != NULL);
	262	return 0;
	263	}
	264
04a479f7	265	static void *
	266	kstat_seq_data_addr(kstat_t *ksp, loff_t n)
	267	{
	268	void *rc = NULL;
b17edc10	269	SENTRY;
04a479f7	270
	271	switch (ksp->ks_type) {
	272	case KSTAT_TYPE_RAW:
	273	rc = ksp->ks_data;
	274	break;
	275	case KSTAT_TYPE_NAMED:
	276	rc = ksp->ks_data + n * sizeof(kstat_named_t);
	277	break;
	278	case KSTAT_TYPE_INTR:
	279	rc = ksp->ks_data + n * sizeof(kstat_intr_t);
	280	break;
	281	case KSTAT_TYPE_IO:
	282	rc = ksp->ks_data + n * sizeof(kstat_io_t);
	283	break;
	284	case KSTAT_TYPE_TIMER:
	285	rc = ksp->ks_data + n * sizeof(kstat_timer_t);
	286	break;
dba79fcb BB	287	case KSTAT_TYPE_TXG:
	288	rc = ksp->ks_data + n * sizeof(kstat_txg_t);
	289	break;
04a479f7	290	default:
55abb092	291	PANIC("Undefined kstat type %d\n", ksp->ks_type);
04a479f7	292	}
04a479f7	293
b17edc10	294	SRETURN(rc);
04a479f7	295	}
	296
	297	static void *
	298	kstat_seq_start(struct seq_file f, loff_t pos)
	299	{
	300	loff_t n = *pos;
	301	kstat_t ksp = (kstat_t )f->private;
	302	ASSERT(ksp->ks_magic == KS_MAGIC);
b17edc10	303	SENTRY;
04a479f7	304
71c9f0b0 BB	305	mutex_enter(&ksp->ks_lock);
71c9f0b0 BB	306
9a8b7a74 BB	307	/* Dynamically update kstat, on error existing kstats are used */
	308	(void) ksp->ks_update(ksp, KSTAT_READ);
	309
04a479f7	310	ksp->ks_snaptime = gethrtime();
	311
	312	if (!n)
	313	kstat_seq_show_headers(f);
	314
	315	if (n >= ksp->ks_ndata)
b17edc10	316	SRETURN(NULL);
04a479f7	317
b17edc10	318	SRETURN(kstat_seq_data_addr(ksp, n));
04a479f7	319	}
	320
	321	static void *
	322	kstat_seq_next(struct seq_file f, void p, loff_t *pos)
	323	{
	324	kstat_t ksp = (kstat_t )f->private;
	325	ASSERT(ksp->ks_magic == KS_MAGIC);
b17edc10	326	SENTRY;
04a479f7	327
	328	++*pos;
	329	if (*pos >= ksp->ks_ndata)
b17edc10	330	SRETURN(NULL);
04a479f7	331
b17edc10	332	SRETURN(kstat_seq_data_addr(ksp, *pos));
04a479f7	333	}
	334
	335	static void
	336	kstat_seq_stop(struct seq_file f, void v)
	337	{
	338	kstat_t ksp = (kstat_t )f->private;
	339	ASSERT(ksp->ks_magic == KS_MAGIC);
	340
71c9f0b0	341	mutex_exit(&ksp->ks_lock);
04a479f7	342	}
	343
	344	static struct seq_operations kstat_seq_ops = {
	345	.show = kstat_seq_show,
	346	.start = kstat_seq_start,
	347	.next = kstat_seq_next,
	348	.stop = kstat_seq_stop,
	349	};
	350
	351	static int
	352	proc_kstat_open(struct inode inode, struct file filp)
	353	{
	354	struct seq_file *f;
	355	int rc;
	356
	357	rc = seq_open(filp, &kstat_seq_ops);
	358	if (rc)
	359	return rc;
	360
	361	f = filp->private_data;
	362	f->private = PDE(inode)->data;
	363
	364	return rc;
	365	}
	366
	367	static struct file_operations proc_kstat_operations = {
	368	.open = proc_kstat_open,
	369	.read = seq_read,
	370	.llseek = seq_lseek,
	371	.release = seq_release,
	372	};
	373
	374	kstat_t *
	375	__kstat_create(const char ks_module, int ks_instance, const char ks_name,
	376	const char *ks_class, uchar_t ks_type, uint_t ks_ndata,
	377	uchar_t ks_flags)
	378	{
	379	kstat_t *ksp;
	380
	381	ASSERT(ks_module);
	382	ASSERT(ks_instance == 0);
	383	ASSERT(ks_name);
	384	ASSERT(!(ks_flags & KSTAT_FLAG_UNSUPPORTED));
	385
	386	if ((ks_type == KSTAT_TYPE_INTR) \|\| (ks_type == KSTAT_TYPE_IO))
	387	ASSERT(ks_ndata == 1);
	388
	389	ksp = kmem_zalloc(sizeof(*ksp), KM_SLEEP);
	390	if (ksp == NULL)
	391	return ksp;
	392
	393	spin_lock(&kstat_lock);
	394	ksp->ks_kid = kstat_id;
	395	kstat_id++;
	396	spin_unlock(&kstat_lock);
	397
	398	ksp->ks_magic = KS_MAGIC;
71c9f0b0	399	mutex_init(&ksp->ks_lock, NULL, MUTEX_DEFAULT, NULL);
04a479f7	400	INIT_LIST_HEAD(&ksp->ks_list);
	401
	402	ksp->ks_crtime = gethrtime();
	403	ksp->ks_snaptime = ksp->ks_crtime;
	404	strncpy(ksp->ks_module, ks_module, KSTAT_STRLEN);
	405	ksp->ks_instance = ks_instance;
	406	strncpy(ksp->ks_name, ks_name, KSTAT_STRLEN);
	407	strncpy(ksp->ks_class, ks_class, KSTAT_STRLEN);
	408	ksp->ks_type = ks_type;
	409	ksp->ks_flags = ks_flags;
9a8b7a74 BB	410	ksp->ks_update = kstat_default_update;
9a8b7a74 BB	411	ksp->ks_private = NULL;
04a479f7	412
	413	switch (ksp->ks_type) {
	414	case KSTAT_TYPE_RAW:
	415	ksp->ks_ndata = 1;
	416	ksp->ks_data_size = ks_ndata;
	417	break;
	418	case KSTAT_TYPE_NAMED:
	419	ksp->ks_ndata = ks_ndata;
	420	ksp->ks_data_size = ks_ndata * sizeof(kstat_named_t);
	421	break;
	422	case KSTAT_TYPE_INTR:
	423	ksp->ks_ndata = ks_ndata;
	424	ksp->ks_data_size = ks_ndata * sizeof(kstat_intr_t);
	425	break;
	426	case KSTAT_TYPE_IO:
	427	ksp->ks_ndata = ks_ndata;
	428	ksp->ks_data_size = ks_ndata * sizeof(kstat_io_t);
	429	break;
	430	case KSTAT_TYPE_TIMER:
	431	ksp->ks_ndata = ks_ndata;
	432	ksp->ks_data_size = ks_ndata * sizeof(kstat_timer_t);
	433	break;
dba79fcb BB	434	case KSTAT_TYPE_TXG:
	435	ksp->ks_ndata = ks_ndata;
	436	ksp->ks_data_size = ks_ndata * sizeof(kstat_timer_t);
	437	break;
04a479f7	438	default:
55abb092	439	PANIC("Undefined kstat type %d\n", ksp->ks_type);
04a479f7	440	}
	441
	442	if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) {
	443	ksp->ks_data = NULL;
	444	} else {
	445	ksp->ks_data = kmem_alloc(ksp->ks_data_size, KM_SLEEP);
	446	if (ksp->ks_data == NULL) {
	447	kmem_free(ksp, sizeof(*ksp));
	448	ksp = NULL;
	449	}
	450	}
	451
	452	return ksp;
	453	}
	454	EXPORT_SYMBOL(__kstat_create);
	455
	456	void
	457	__kstat_install(kstat_t *ksp)
	458	{
	459	struct proc_dir_entry de_module, de_name;
	460	kstat_t *tmp;
	461	int rc = 0;
b17edc10	462	SENTRY;
04a479f7	463
	464	spin_lock(&kstat_lock);
	465
	466	/* Item may only be added to the list once */
	467	list_for_each_entry(tmp, &kstat_list, ks_list) {
	468	if (tmp == ksp) {
	469	spin_unlock(&kstat_lock);
b17edc10	470	SGOTO(out, rc = -EEXIST);
04a479f7	471	}
	472	}
	473
	474	list_add_tail(&ksp->ks_list, &kstat_list);
	475	spin_unlock(&kstat_lock);
	476
c30df9c8	477	de_module = proc_dir_entry_find(proc_spl_kstat, ksp->ks_module);
04a479f7	478	if (de_module == NULL) {
c30df9c8	479	de_module = proc_mkdir(ksp->ks_module, proc_spl_kstat);
04a479f7	480	if (de_module == NULL)
b17edc10	481	SGOTO(out, rc = -EUNATCH);
04a479f7	482	}
	483
	484	de_name = create_proc_entry(ksp->ks_name, 0444, de_module);
	485	if (de_name == NULL)
b17edc10	486	SGOTO(out, rc = -EUNATCH);
04a479f7	487
71c9f0b0	488	mutex_enter(&ksp->ks_lock);
04a479f7	489	ksp->ks_proc = de_name;
	490	de_name->proc_fops = &proc_kstat_operations;
	491	de_name->data = (void *)ksp;
71c9f0b0	492	mutex_exit(&ksp->ks_lock);
04a479f7	493	out:
	494	if (rc) {
	495	spin_lock(&kstat_lock);
	496	list_del_init(&ksp->ks_list);
	497	spin_unlock(&kstat_lock);
	498	}
	499
b17edc10	500	SEXIT;
04a479f7	501	}
	502	EXPORT_SYMBOL(__kstat_install);
	503
	504	void
	505	__kstat_delete(kstat_t *ksp)
	506	{
	507	struct proc_dir_entry *de_module;
	508
	509	spin_lock(&kstat_lock);
	510	list_del_init(&ksp->ks_list);
	511	spin_unlock(&kstat_lock);
	512
	513	if (ksp->ks_proc) {
	514	de_module = ksp->ks_proc->parent;
	515	remove_proc_entry(ksp->ks_name, de_module);
	516
	517	/* Remove top level module directory if it's empty */
	518	if (proc_dir_entries(de_module) == 0)
	519	remove_proc_entry(de_module->name, de_module->parent);
	520	}
	521
	522	if (!(ksp->ks_flags & KSTAT_FLAG_VIRTUAL))
	523	kmem_free(ksp->ks_data, ksp->ks_data_size);
	524
71c9f0b0	525	mutex_destroy(&ksp->ks_lock);
04a479f7	526	kmem_free(ksp, sizeof(*ksp));
	527
	528	return;
	529	}
	530	EXPORT_SYMBOL(__kstat_delete);
	531
04a479f7	532	int
1114ae6a	533	spl_kstat_init(void)
04a479f7	534	{
b17edc10	535	SENTRY;
04a479f7	536	spin_lock_init(&kstat_lock);
	537	INIT_LIST_HEAD(&kstat_list);
	538	kstat_id = 0;
b17edc10	539	SRETURN(0);
04a479f7	540	}
	541
	542	void
1114ae6a	543	spl_kstat_fini(void)
04a479f7	544	{
b17edc10	545	SENTRY;
04a479f7	546	ASSERT(list_empty(&kstat_list));
b17edc10	547	SEXIT;
04a479f7	548	}
04a479f7	549