588 lines
18 KiB
C
588 lines
18 KiB
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://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/>.
|
|
*****************************************************************************
|
|
* 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
|
|
#ifndef HAVE_PDE_DATA
|
|
#define PDE_DATA(x) (PDE(x)->data)
|
|
#endif
|
|
|
|
static kmutex_t kstat_module_lock;
|
|
static struct list_head kstat_module_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 kstat_module_t *
|
|
kstat_find_module(char *name)
|
|
{
|
|
kstat_module_t *module;
|
|
|
|
list_for_each_entry(module, &kstat_module_list, ksm_module_list)
|
|
if (strncmp(name, module->ksm_name, KSTAT_STRLEN) == 0)
|
|
return (module);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
static kstat_module_t *
|
|
kstat_create_module(char *name)
|
|
{
|
|
kstat_module_t *module;
|
|
struct proc_dir_entry *pde;
|
|
|
|
pde = proc_mkdir(name, proc_spl_kstat);
|
|
if (pde == NULL)
|
|
return (NULL);
|
|
|
|
module = kmem_alloc(sizeof (kstat_module_t), KM_SLEEP);
|
|
module->ksm_proc = pde;
|
|
strlcpy(module->ksm_name, name, KSTAT_STRLEN+1);
|
|
INIT_LIST_HEAD(&module->ksm_kstat_list);
|
|
list_add_tail(&module->ksm_module_list, &kstat_module_list);
|
|
|
|
return (module);
|
|
|
|
}
|
|
|
|
static void
|
|
kstat_delete_module(kstat_module_t *module)
|
|
{
|
|
ASSERT(list_empty(&module->ksm_kstat_list));
|
|
remove_proc_entry(module->ksm_name, proc_spl_kstat);
|
|
list_del(&module->ksm_module_list);
|
|
kmem_free(module, sizeof(kstat_module_t));
|
|
}
|
|
|
|
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_DATA(inode);
|
|
|
|
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;
|
|
|
|
mutex_enter(&kstat_module_lock);
|
|
ksp->ks_kid = kstat_id;
|
|
kstat_id++;
|
|
mutex_exit(&kstat_module_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)
|
|
{
|
|
kstat_module_t *module;
|
|
kstat_t *tmp;
|
|
|
|
ASSERT(ksp);
|
|
|
|
mutex_enter(&kstat_module_lock);
|
|
|
|
module = kstat_find_module(ksp->ks_module);
|
|
if (module == NULL) {
|
|
module = kstat_create_module(ksp->ks_module);
|
|
if (module == NULL)
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Only one entry by this name per-module, on failure the module
|
|
* shouldn't be deleted because we know it has at least one entry.
|
|
*/
|
|
list_for_each_entry(tmp, &module->ksm_kstat_list, ks_list)
|
|
if (strncmp(tmp->ks_name, ksp->ks_name, KSTAT_STRLEN) == 0)
|
|
goto out;
|
|
|
|
list_add_tail(&ksp->ks_list, &module->ksm_kstat_list);
|
|
|
|
mutex_enter(&ksp->ks_lock);
|
|
ksp->ks_owner = module;
|
|
ksp->ks_proc = proc_create_data(ksp->ks_name, 0444,
|
|
module->ksm_proc, &proc_kstat_operations, (void *)ksp);
|
|
if (ksp->ks_proc == NULL) {
|
|
list_del_init(&ksp->ks_list);
|
|
if (list_empty(&module->ksm_kstat_list))
|
|
kstat_delete_module(module);
|
|
}
|
|
mutex_exit(&ksp->ks_lock);
|
|
out:
|
|
mutex_exit(&kstat_module_lock);
|
|
}
|
|
EXPORT_SYMBOL(__kstat_install);
|
|
|
|
void
|
|
__kstat_delete(kstat_t *ksp)
|
|
{
|
|
kstat_module_t *module = ksp->ks_owner;
|
|
|
|
mutex_enter(&kstat_module_lock);
|
|
list_del_init(&ksp->ks_list);
|
|
mutex_exit(&kstat_module_lock);
|
|
|
|
if (ksp->ks_proc) {
|
|
remove_proc_entry(ksp->ks_name, module->ksm_proc);
|
|
|
|
/* Remove top level module directory if it's empty */
|
|
if (list_empty(&module->ksm_kstat_list))
|
|
kstat_delete_module(module);
|
|
}
|
|
|
|
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;
|
|
mutex_init(&kstat_module_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
INIT_LIST_HEAD(&kstat_module_list);
|
|
kstat_id = 0;
|
|
SRETURN(0);
|
|
}
|
|
|
|
void
|
|
spl_kstat_fini(void)
|
|
{
|
|
SENTRY;
|
|
ASSERT(list_empty(&kstat_module_list));
|
|
mutex_destroy(&kstat_module_lock);
|
|
SEXIT;
|
|
}
|
|
|