Update OpenZFS to 2.0.0-rc3-gfc5966vendor/openzfs/2.0-rc3-gfc5966

1 files changed, 84 insertions, 2 deletions

diff --git a/module/os/freebsd/spl/spl_procfs_list.c b/module/os/freebsd/spl/spl_procfs_list.c
index 7b4ae9d0e357..e8448ce00686 100644
--- a/module/os/freebsd/spl/spl_procfs_list.c
+++ b/module/os/freebsd/spl/spl_procfs_list.c
@@ -32,12 +32,74 @@ __FBSDID("$FreeBSD$");
 #include <sys/mutex.h>
 #include <sys/procfs_list.h>
 
+typedef struct procfs_list_iter {
+	procfs_list_t *pli_pl;
+	void *pli_elt;
+} pli_t;
+
 void
-seq_printf(struct seq_file *m, const char *fmt, ...)
-{}
+seq_printf(struct seq_file *f, const char *fmt, ...)
+{
+	va_list adx;
+
+	va_start(adx, fmt);
+	(void) vsnprintf(f->sf_buf, f->sf_size, fmt, adx);
+	va_end(adx);
+}
+
+static int
+procfs_list_update(kstat_t *ksp, int rw)
+{
+	procfs_list_t *pl = ksp->ks_private;
+
+	if (rw == KSTAT_WRITE)
+		pl->pl_clear(pl);
+
+	return (0);
+}
+
+static int
+procfs_list_data(char *buf, size_t size, void *data)
+{
+	pli_t *p;
+	void *elt;
+	procfs_list_t *pl;
+	struct seq_file f;
+
+	p = data;
+	pl = p->pli_pl;
+	elt = p->pli_elt;
+	free(p, M_TEMP);
+	f.sf_buf = buf;
+	f.sf_size = size;
+	return (pl->pl_show(&f, elt));
+}
+
+static void *
+procfs_list_addr(kstat_t *ksp, loff_t n)
+{
+	procfs_list_t *pl = ksp->ks_private;
+	void *elt = ksp->ks_private1;
+	pli_t *p = NULL;
+
+
+	if (n == 0)
+		ksp->ks_private1 = list_head(&pl->pl_list);
+	else if (elt)
+		ksp->ks_private1 = list_next(&pl->pl_list, elt);
+
+	if (ksp->ks_private1) {
+		p = malloc(sizeof (*p), M_TEMP, M_WAITOK);
+		p->pli_pl = pl;
+		p->pli_elt = ksp->ks_private1;
+	}
+
+	return (p);
+}
 
 void
 procfs_list_install(const char *module,
+    const char *submodule,
     const char *name,
     mode_t mode,
     procfs_list_t *procfs_list,
@@ -46,12 +108,31 @@ procfs_list_install(const char *module,
     int (*clear)(procfs_list_t *procfs_list),
     size_t procfs_list_node_off)
 {
+	kstat_t *procfs_kstat;
+
 	mutex_init(&procfs_list->pl_lock, NULL, MUTEX_DEFAULT, NULL);
 	list_create(&procfs_list->pl_list,
 	    procfs_list_node_off + sizeof (procfs_list_node_t),
 	    procfs_list_node_off + offsetof(procfs_list_node_t, pln_link));
+	procfs_list->pl_show = show;
+	procfs_list->pl_show_header = show_header;
+	procfs_list->pl_clear = clear;
 	procfs_list->pl_next_id = 1;
 	procfs_list->pl_node_offset = procfs_list_node_off;
+
+	procfs_kstat =  kstat_create(module, 0, name, submodule,
+	    KSTAT_TYPE_RAW, 0, KSTAT_FLAG_VIRTUAL);
+
+	if (procfs_kstat) {
+		procfs_kstat->ks_lock = &procfs_list->pl_lock;
+		procfs_kstat->ks_ndata = UINT32_MAX;
+		procfs_kstat->ks_private = procfs_list;
+		procfs_kstat->ks_update = procfs_list_update;
+		kstat_set_seq_raw_ops(procfs_kstat, show_header,
+		    procfs_list_data, procfs_list_addr);
+		kstat_install(procfs_kstat);
+		procfs_list->pl_private = procfs_kstat;
+	}
 }
 
 void
@@ -62,6 +143,7 @@ void
 procfs_list_destroy(procfs_list_t *procfs_list)
 {
 	ASSERT(list_is_empty(&procfs_list->pl_list));
+	kstat_delete(procfs_list->pl_private);
 	list_destroy(&procfs_list->pl_list);
 	mutex_destroy(&procfs_list->pl_lock);
 }