bcachefs: Fixes for building in userspace

- Marking a non-static function as inline doesn't actually work and is
   now causing problems - drop that

 - Introduce BCACHEFS_LOG_PREFIX for when we want to prefix log messages
   with bcachefs (filesystem name)

 - Userspace doesn't have real percpu variables (maybe we can get this
   fixed someday), put an #ifdef around bch2_disk_reservation_add()
   fastpath

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

fs/bcachefs/bcachefs.h

@@ -226,6 +226,10 @@ do {									\
 	 dynamic_fault("bcachefs:meta:write:" name)
 
 #ifdef __KERNEL__
+#define BCACHEFS_LOG_PREFIX
+#endif
+
+#ifdef BCACHEFS_LOG_PREFIX
 #define bch2_log_msg(_c, fmt)		"bcachefs (%s): " fmt, ((_c)->name)
 #define bch2_fmt(_c, fmt)		bch2_log_msg(_c, fmt "\n")
 #define bch2_fmt_inum(_c, _inum, fmt)	"bcachefs (%s inum %llu): " fmt "\n", ((_c)->name), (_inum)

fs/bcachefs/btree_iter.c

@@ -636,9 +636,9 @@ static inline void __btree_path_level_init(struct btree_path *path,
 		bch2_btree_node_iter_peek(&l->iter, l->b);
 }
 
-inline void bch2_btree_path_level_init(struct btree_trans *trans,
-				       struct btree_path *path,
-				       struct btree *b)
+void bch2_btree_path_level_init(struct btree_trans *trans,
+				struct btree_path *path,
+				struct btree *b)
 {
 	BUG_ON(path->cached);
 
@@ -1554,7 +1554,7 @@ struct btree_path *bch2_path_get(struct btree_trans *trans,
 	return path;
 }
 
-inline struct bkey_s_c bch2_btree_path_peek_slot(struct btree_path *path, struct bkey *u)
+struct bkey_s_c bch2_btree_path_peek_slot(struct btree_path *path, struct bkey *u)
 {
 
 	struct btree_path_level *l = path_l(path);

fs/bcachefs/btree_iter.h

@@ -177,13 +177,12 @@ int __must_check bch2_btree_path_traverse(struct btree_trans *,
 					  struct btree_path *, unsigned);
 struct btree_path *bch2_path_get(struct btree_trans *, enum btree_id, struct bpos,
 				 unsigned, unsigned, unsigned);
-inline struct bkey_s_c bch2_btree_path_peek_slot(struct btree_path *, struct bkey *);
+struct bkey_s_c bch2_btree_path_peek_slot(struct btree_path *, struct bkey *);
 
 struct bkey_i *bch2_btree_journal_peek_slot(struct btree_trans *,
 					struct btree_iter *, struct bpos);
 
-inline void bch2_btree_path_level_init(struct btree_trans *,
-				       struct btree_path *, struct btree *);
+void bch2_btree_path_level_init(struct btree_trans *, struct btree_path *, struct btree *);
 
 #ifdef CONFIG_BCACHEFS_DEBUG
 void bch2_trans_verify_paths(struct btree_trans *);

fs/bcachefs/btree_locking.c

@@ -179,10 +179,9 @@ static noinline int break_cycle(struct lock_graph *g, struct printbuf *cycle)
 	}
 
 	if (unlikely(!best)) {
-		struct bch_fs *c = g->g->trans->c;
 		struct printbuf buf = PRINTBUF;
 
-		bch_err(c, "cycle of nofail locks");
+		prt_printf(&buf, bch2_fmt(g->g->trans->c, "cycle of nofail locks"));
 
 		for (i = g->g; i < g->g + g->nr; i++) {
 			struct btree_trans *trans = i->trans;

fs/bcachefs/buckets.h

@@ -255,6 +255,7 @@ int __bch2_disk_reservation_add(struct bch_fs *,
 static inline int bch2_disk_reservation_add(struct bch_fs *c, struct disk_reservation *res,
 					    u64 sectors, int flags)
 {
+#ifdef __KERNEL__
 	u64 old, new;
 
 	do {
@@ -268,6 +269,9 @@ static inline int bch2_disk_reservation_add(struct bch_fs *c, struct disk_reserv
 	this_cpu_add(*c->online_reserved, sectors);
 	res->sectors			+= sectors;
 	return 0;
+#else
+	return __bch2_disk_reservation_add(c, res, sectors, flags);
+#endif
 }
 
 static inline struct disk_reservation

fs/bcachefs/error.c

@@ -125,8 +125,10 @@ int bch2_fsck_err(struct bch_fs *c, unsigned flags, const char *fmt, ...)
 		s->nr++;
 	}
 
+#ifdef BCACHEFS_LOG_PREFIX
 	if (!strncmp(fmt, "bcachefs:", 9))
 		prt_printf(out, bch2_log_msg(c, ""));
+#endif
 
 	va_start(args, fmt);
 	prt_vprintf(out, fmt, args);

fs/bcachefs/move.c

@@ -177,7 +177,7 @@ void bch2_moving_ctxt_init(struct moving_context *ctxt,
 	}
 }
 
-void bch_move_stats_init(struct bch_move_stats *stats, char *name)
+void bch2_move_stats_init(struct bch_move_stats *stats, char *name)
 {
 	memset(stats, 0, sizeof(*stats));
 	scnprintf(stats->name, sizeof(stats->name), "%s", name);
@@ -755,7 +755,7 @@ int bch2_data_job(struct bch_fs *c,
 
 	switch (op.op) {
 	case BCH_DATA_OP_REREPLICATE:
-		bch_move_stats_init(stats, "rereplicate");
+		bch2_move_stats_init(stats, "rereplicate");
 		stats->data_type = BCH_DATA_journal;
 		ret = bch2_journal_flush_device_pins(&c->journal, -1);
 
@@ -779,7 +779,7 @@ int bch2_data_job(struct bch_fs *c,
 		if (op.migrate.dev >= c->sb.nr_devices)
 			return -EINVAL;
 
-		bch_move_stats_init(stats, "migrate");
+		bch2_move_stats_init(stats, "migrate");
 		stats->data_type = BCH_DATA_journal;
 		ret = bch2_journal_flush_device_pins(&c->journal, op.migrate.dev);
 
@@ -800,7 +800,7 @@ int bch2_data_job(struct bch_fs *c,
 		ret = bch2_replicas_gc2(c) ?: ret;
 		break;
 	case BCH_DATA_OP_REWRITE_OLD_NODES:
-		bch_move_stats_init(stats, "rewrite_old_nodes");
+		bch2_move_stats_init(stats, "rewrite_old_nodes");
 		ret = bch2_scan_old_btree_nodes(c, stats);
 		break;
 	default:

fs/bcachefs/move.h

@@ -50,8 +50,7 @@ int bch2_data_job(struct bch_fs *,
 		  struct bch_move_stats *,
 		  struct bch_ioctl_data);
 
-inline void bch_move_stats_init(struct bch_move_stats *stats,
-				char *name);
+void bch2_move_stats_init(struct bch_move_stats *stats, char *name);
 
 
 #endif /* _BCACHEFS_MOVE_H */

fs/bcachefs/movinggc.c

@@ -213,7 +213,7 @@ static int bch2_copygc(struct bch_fs *c)
 	size_t heap_size = 0;
 	int ret;
 
-	bch_move_stats_init(&move_stats, "copygc");
+	bch2_move_stats_init(&move_stats, "copygc");
 
 	/*
 	 * Find buckets with lowest sector counts, skipping completely

fs/bcachefs/rebalance.c

@@ -189,7 +189,7 @@ static int bch2_rebalance_thread(void *arg)
 	prev_start	= jiffies;
 	prev_cputime	= curr_cputime();
 
-	bch_move_stats_init(&move_stats, "rebalance");
+	bch2_move_stats_init(&move_stats, "rebalance");
 	while (!kthread_wait_freezable(r->enabled)) {
 		cond_resched();
 

fs/bcachefs/recovery.c

@@ -1376,7 +1376,7 @@ use_clean:
 	    le16_to_cpu(c->sb.version_min) < bcachefs_metadata_version_btree_ptr_sectors_written) {
 		struct bch_move_stats stats;
 
-		bch_move_stats_init(&stats, "recovery");
+		bch2_move_stats_init(&stats, "recovery");
 
 		bch_info(c, "scanning for old btree nodes");
 		ret = bch2_fs_read_write(c);