bcachefs: sb-members.c

Split out a new file for bch_sb_field_members - we'll likely want to
move more code here in the future.

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

1 files changed, 173 insertions, 0 deletions

diff --git a/fs/bcachefs/sb-members.c b/fs/bcachefs/sb-members.c
new file mode 100644
index 000000000000..16a2b3389525
--- /dev/null
+++ b/fs/bcachefs/sb-members.c
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "bcachefs.h"
+#include "disk_groups.h"
+#include "replicas.h"
+#include "sb-members.h"
+#include "super-io.h"
+
+/* Code for bch_sb_field_members: */
+
+static int bch2_sb_members_validate(struct bch_sb *sb,
+				    struct bch_sb_field *f,
+				    struct printbuf *err)
+{
+	struct bch_sb_field_members *mi = field_to_type(f, members);
+	unsigned i;
+
+	if ((void *) (mi->members + sb->nr_devices) >
+	    vstruct_end(&mi->field)) {
+		prt_printf(err, "too many devices for section size");
+		return -BCH_ERR_invalid_sb_members;
+	}
+
+	for (i = 0; i < sb->nr_devices; i++) {
+		struct bch_member *m = mi->members + i;
+
+		if (!bch2_member_exists(m))
+			continue;
+
+		if (le64_to_cpu(m->nbuckets) > LONG_MAX) {
+			prt_printf(err, "device %u: too many buckets (got %llu, max %lu)",
+			       i, le64_to_cpu(m->nbuckets), LONG_MAX);
+			return -BCH_ERR_invalid_sb_members;
+		}
+
+		if (le64_to_cpu(m->nbuckets) -
+		    le16_to_cpu(m->first_bucket) < BCH_MIN_NR_NBUCKETS) {
+			prt_printf(err, "device %u: not enough buckets (got %llu, max %u)",
+			       i, le64_to_cpu(m->nbuckets), BCH_MIN_NR_NBUCKETS);
+			return -BCH_ERR_invalid_sb_members;
+		}
+
+		if (le16_to_cpu(m->bucket_size) <
+		    le16_to_cpu(sb->block_size)) {
+			prt_printf(err, "device %u: bucket size %u smaller than block size %u",
+			       i, le16_to_cpu(m->bucket_size), le16_to_cpu(sb->block_size));
+			return -BCH_ERR_invalid_sb_members;
+		}
+
+		if (le16_to_cpu(m->bucket_size) <
+		    BCH_SB_BTREE_NODE_SIZE(sb)) {
+			prt_printf(err, "device %u: bucket size %u smaller than btree node size %llu",
+			       i, le16_to_cpu(m->bucket_size), BCH_SB_BTREE_NODE_SIZE(sb));
+			return -BCH_ERR_invalid_sb_members;
+		}
+	}
+
+	return 0;
+}
+
+static void bch2_sb_members_to_text(struct printbuf *out, struct bch_sb *sb,
+				    struct bch_sb_field *f)
+{
+	struct bch_sb_field_members *mi = field_to_type(f, members);
+	struct bch_sb_field_disk_groups *gi = bch2_sb_get_disk_groups(sb);
+	unsigned i;
+
+	for (i = 0; i < sb->nr_devices; i++) {
+		struct bch_member *m = mi->members + i;
+		unsigned data_have = bch2_sb_dev_has_data(sb, i);
+		u64 bucket_size = le16_to_cpu(m->bucket_size);
+		u64 device_size = le64_to_cpu(m->nbuckets) * bucket_size;
+
+		if (!bch2_member_exists(m))
+			continue;
+
+		prt_printf(out, "Device:");
+		prt_tab(out);
+		prt_printf(out, "%u", i);
+		prt_newline(out);
+
+		printbuf_indent_add(out, 2);
+
+		prt_printf(out, "UUID:");
+		prt_tab(out);
+		pr_uuid(out, m->uuid.b);
+		prt_newline(out);
+
+		prt_printf(out, "Size:");
+		prt_tab(out);
+		prt_units_u64(out, device_size << 9);
+		prt_newline(out);
+
+		prt_printf(out, "Bucket size:");
+		prt_tab(out);
+		prt_units_u64(out, bucket_size << 9);
+		prt_newline(out);
+
+		prt_printf(out, "First bucket:");
+		prt_tab(out);
+		prt_printf(out, "%u", le16_to_cpu(m->first_bucket));
+		prt_newline(out);
+
+		prt_printf(out, "Buckets:");
+		prt_tab(out);
+		prt_printf(out, "%llu", le64_to_cpu(m->nbuckets));
+		prt_newline(out);
+
+		prt_printf(out, "Last mount:");
+		prt_tab(out);
+		if (m->last_mount)
+			pr_time(out, le64_to_cpu(m->last_mount));
+		else
+			prt_printf(out, "(never)");
+		prt_newline(out);
+
+		prt_printf(out, "State:");
+		prt_tab(out);
+		prt_printf(out, "%s",
+		       BCH_MEMBER_STATE(m) < BCH_MEMBER_STATE_NR
+		       ? bch2_member_states[BCH_MEMBER_STATE(m)]
+		       : "unknown");
+		prt_newline(out);
+
+		prt_printf(out, "Label:");
+		prt_tab(out);
+		if (BCH_MEMBER_GROUP(m)) {
+			unsigned idx = BCH_MEMBER_GROUP(m) - 1;
+
+			if (idx < disk_groups_nr(gi))
+				prt_printf(out, "%s (%u)",
+				       gi->entries[idx].label, idx);
+			else
+				prt_printf(out, "(bad disk labels section)");
+		} else {
+			prt_printf(out, "(none)");
+		}
+		prt_newline(out);
+
+		prt_printf(out, "Data allowed:");
+		prt_tab(out);
+		if (BCH_MEMBER_DATA_ALLOWED(m))
+			prt_bitflags(out, bch2_data_types, BCH_MEMBER_DATA_ALLOWED(m));
+		else
+			prt_printf(out, "(none)");
+		prt_newline(out);
+
+		prt_printf(out, "Has data:");
+		prt_tab(out);
+		if (data_have)
+			prt_bitflags(out, bch2_data_types, data_have);
+		else
+			prt_printf(out, "(none)");
+		prt_newline(out);
+
+		prt_printf(out, "Discard:");
+		prt_tab(out);
+		prt_printf(out, "%llu", BCH_MEMBER_DISCARD(m));
+		prt_newline(out);
+
+		prt_printf(out, "Freespace initialized:");
+		prt_tab(out);
+		prt_printf(out, "%llu", BCH_MEMBER_FREESPACE_INITIALIZED(m));
+		prt_newline(out);
+
+		printbuf_indent_sub(out, 2);
+	}
+}
+
+const struct bch_sb_field_ops bch_sb_field_ops_members = {
+	.validate	= bch2_sb_members_validate,
+	.to_text	= bch2_sb_members_to_text,
+};