bcachefs: reserve space in journal for fs usage entries

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

1 files changed, 34 insertions, 0 deletions

diff --git a/fs/bcachefs/replicas.c b/fs/bcachefs/replicas.c
index 5663441fd7ce..991d409b6a86 100644
--- a/fs/bcachefs/replicas.c
+++ b/fs/bcachefs/replicas.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 
 #include "bcachefs.h"
+#include "journal.h"
 #include "replicas.h"
 #include "super-io.h"
 
@@ -302,6 +303,27 @@ err:
 	return ret;
 }
 
+static unsigned reserve_journal_replicas(struct bch_fs *c,
+				     struct bch_replicas_cpu *r)
+{
+	struct bch_replicas_entry *e;
+	unsigned journal_res_u64s = 0;
+
+	/* nr_inodes: */
+	journal_res_u64s +=
+		DIV_ROUND_UP(sizeof(struct jset_entry_usage), sizeof(u64));
+
+	/* key_version: */
+	journal_res_u64s +=
+		DIV_ROUND_UP(sizeof(struct jset_entry_usage), sizeof(u64));
+
+	for_each_cpu_replicas_entry(r, e)
+		journal_res_u64s +=
+			DIV_ROUND_UP(sizeof(struct jset_entry_usage) +
+				     e->nr_devs, sizeof(u64));
+	return journal_res_u64s;
+}
+
 noinline
 static int bch2_mark_replicas_slowpath(struct bch_fs *c,
 				struct bch_replicas_entry *new_entry)
@@ -329,6 +351,10 @@ static int bch2_mark_replicas_slowpath(struct bch_fs *c,
 		ret = bch2_cpu_replicas_to_sb_replicas(c, &new_r);
 		if (ret)
 			goto err;
+
+		bch2_journal_entry_res_resize(&c->journal,
+				&c->replicas_journal_res,
+				reserve_journal_replicas(c, &new_r));
 	}
 
 	if (!new_r.entries &&
@@ -595,6 +621,7 @@ int bch2_sb_replicas_to_cpu_replicas(struct bch_fs *c)
 	bch2_cpu_replicas_sort(&new_r);
 
 	percpu_down_write(&c->mark_lock);
+
 	ret = replicas_table_update(c, &new_r);
 	percpu_up_write(&c->mark_lock);
 
@@ -915,3 +942,10 @@ unsigned bch2_dev_has_data(struct bch_fs *c, struct bch_dev *ca)
 
 	return ret;
 }
+
+int bch2_fs_replicas_init(struct bch_fs *c)
+{
+	c->journal.entry_u64s_reserved +=
+		reserve_journal_replicas(c, &c->replicas);
+	return 0;
+}