bcachefs: bch2_copygc_wait_to_text()

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/movinggc.c

@@ -172,6 +172,18 @@ unsigned long bch2_copygc_wait_amount(struct bch_fs *c)
 	return wait;
 }
 
+void bch2_copygc_wait_to_text(struct printbuf *out, struct bch_fs *c)
+{
+	prt_printf(out, "Currently waiting for:     ");
+	prt_human_readable_u64(out, max(0LL, c->copygc_wait -
+					atomic64_read(&c->io_clock[WRITE].now)) << 9);
+	prt_newline(out);
+
+	prt_printf(out, "Currently calculated wait: ");
+	prt_human_readable_u64(out, bch2_copygc_wait_amount(c));
+	prt_newline(out);
+}
+
 static int bch2_copygc_thread(void *arg)
 {
 	struct bch_fs *c = arg;

fs/bcachefs/movinggc.h

@@ -3,6 +3,8 @@
 #define _BCACHEFS_MOVINGGC_H
 
 unsigned long bch2_copygc_wait_amount(struct bch_fs *);
+void bch2_copygc_wait_to_text(struct printbuf *, struct bch_fs *);
+
 void bch2_copygc_stop(struct bch_fs *);
 int bch2_copygc_start(struct bch_fs *);
 void bch2_fs_copygc_init(struct bch_fs *);

fs/bcachefs/sysfs.c

@@ -27,6 +27,7 @@
 #include "journal.h"
 #include "keylist.h"
 #include "move.h"
+#include "movinggc.h"
 #include "nocow_locking.h"
 #include "opts.h"
 #include "rebalance.h"
@@ -427,9 +428,9 @@ SHOW(bch2_fs)
 
 	sysfs_printf(rebalance_enabled,		"%i", c->rebalance.enabled);
 	sysfs_pd_controller_show(rebalance,	&c->rebalance.pd); /* XXX */
-	sysfs_hprint(copy_gc_wait,
-		     max(0LL, c->copygc_wait -
-			 atomic64_read(&c->io_clock[WRITE].now)) << 9);
+
+	if (attr == &sysfs_copy_gc_wait)
+		bch2_copygc_wait_to_text(out, c);
 
 	if (attr == &sysfs_rebalance_work)
 		bch2_rebalance_work_to_text(out, c);