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Add basic dynamic kstat support

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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
This commit is contained in:
Brian Behlendorf
2012-01-30 12:15:31 -08:00
parent 4b2220f0b9
commit 9a8b7a7458
2 changed files with 22 additions and 1 deletions
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module/spl/spl-kstat.c
+12
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@@ -223,6 +223,13 @@ kstat_seq_show(struct seq_file *f, void *p)
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)
{
@@ -260,6 +267,9 @@ kstat_seq_start(struct seq_file *f, loff_t *pos)
ASSERT(ksp->ks_magic == KS_MAGIC);
SENTRY;
/* Dynamically update kstat, on error existing kstats are used */
(void) ksp->ks_update(ksp, KSTAT_READ);
spin_lock(&ksp->ks_lock);
ksp->ks_snaptime = gethrtime();
@@ -361,6 +371,8 @@ __kstat_create(const char *ks_module, int ks_instance, const char *ks_name,
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: