bcachefs: counters.c -> sb-counters.c
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
diff --git a/fs/bcachefs/sb-counters.c b/fs/bcachefs/sb-counters.c
new file mode 100644
index 0000000..7dc8987
--- /dev/null
+++ b/fs/bcachefs/sb-counters.c
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "bcachefs.h"
+#include "super-io.h"
+#include "sb-counters.h"
+
+/* BCH_SB_FIELD_counters */
+
+static const char * const bch2_counter_names[] = {
+#define x(t, n, ...) (#t),
+ BCH_PERSISTENT_COUNTERS()
+#undef x
+ NULL
+};
+
+static size_t bch2_sb_counter_nr_entries(struct bch_sb_field_counters *ctrs)
+{
+ if (!ctrs)
+ return 0;
+
+ return (__le64 *) vstruct_end(&ctrs->field) - &ctrs->d[0];
+};
+
+static int bch2_sb_counters_validate(struct bch_sb *sb,
+ struct bch_sb_field *f,
+ struct printbuf *err)
+{
+ return 0;
+};
+
+static void bch2_sb_counters_to_text(struct printbuf *out, struct bch_sb *sb,
+ struct bch_sb_field *f)
+{
+ struct bch_sb_field_counters *ctrs = field_to_type(f, counters);
+ unsigned int i;
+ unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
+
+ for (i = 0; i < nr; i++) {
+ if (i < BCH_COUNTER_NR)
+ prt_printf(out, "%s ", bch2_counter_names[i]);
+ else
+ prt_printf(out, "(unknown)");
+
+ prt_tab(out);
+ prt_printf(out, "%llu", le64_to_cpu(ctrs->d[i]));
+ prt_newline(out);
+ }
+};
+
+int bch2_sb_counters_to_cpu(struct bch_fs *c)
+{
+ struct bch_sb_field_counters *ctrs = bch2_sb_field_get(c->disk_sb.sb, counters);
+ unsigned int i;
+ unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
+ u64 val = 0;
+
+ for (i = 0; i < BCH_COUNTER_NR; i++)
+ c->counters_on_mount[i] = 0;
+
+ for (i = 0; i < min_t(unsigned int, nr, BCH_COUNTER_NR); i++) {
+ val = le64_to_cpu(ctrs->d[i]);
+ percpu_u64_set(&c->counters[i], val);
+ c->counters_on_mount[i] = val;
+ }
+ return 0;
+};
+
+int bch2_sb_counters_from_cpu(struct bch_fs *c)
+{
+ struct bch_sb_field_counters *ctrs = bch2_sb_field_get(c->disk_sb.sb, counters);
+ struct bch_sb_field_counters *ret;
+ unsigned int i;
+ unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
+
+ if (nr < BCH_COUNTER_NR) {
+ ret = bch2_sb_field_resize(&c->disk_sb, counters,
+ sizeof(*ctrs) / sizeof(u64) + BCH_COUNTER_NR);
+
+ if (ret) {
+ ctrs = ret;
+ nr = bch2_sb_counter_nr_entries(ctrs);
+ }
+ }
+
+
+ for (i = 0; i < min_t(unsigned int, nr, BCH_COUNTER_NR); i++)
+ ctrs->d[i] = cpu_to_le64(percpu_u64_get(&c->counters[i]));
+ return 0;
+}
+
+void bch2_fs_counters_exit(struct bch_fs *c)
+{
+ free_percpu(c->counters);
+}
+
+int bch2_fs_counters_init(struct bch_fs *c)
+{
+ c->counters = __alloc_percpu(sizeof(u64) * BCH_COUNTER_NR, sizeof(u64));
+ if (!c->counters)
+ return -BCH_ERR_ENOMEM_fs_counters_init;
+
+ return bch2_sb_counters_to_cpu(c);
+}
+
+const struct bch_sb_field_ops bch_sb_field_ops_counters = {
+ .validate = bch2_sb_counters_validate,
+ .to_text = bch2_sb_counters_to_text,
+};
