btrfs-progs: dump-tree: print dev stats

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/print-tree.c b/print-tree.c
index 24710db..03d7714 100644 (file)
--- a/print-tree.c
+++ b/print-tree.c
@@ -1009,6 +1009,31 @@ static void print_balance_item(struct extent_buffer *eb,
        print_disk_balance_args(btrfs_balance_item_sys(eb, bi));
 }
 
+static void print_dev_stats(struct extent_buffer *eb,
+               struct btrfs_dev_stats_item *stats, u32 size)
+{
+       int i;
+       u32 known = BTRFS_DEV_STAT_VALUES_MAX * sizeof(__le64);
+       __le64 *values = btrfs_dev_stats_values(eb, stats);
+
+       printf("\t\tdevice stats\n");
+       printf("\t\twrite_errs %llu read_errs %llu flush_errs %llu corruption_errs %llu generation %llu\n",
+               (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_WRITE_ERRS]),
+               (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_READ_ERRS]),
+               (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_FLUSH_ERRS]),
+               (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_CORRUPTION_ERRS]),
+               (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_GENERATION_ERRS]));
+
+       if (known < size) {
+               printf("\t\tunknown stats item bytes %u", size - known);
+               for (i = BTRFS_DEV_STAT_VALUES_MAX; i * sizeof(__le64) < size; i++) {
+                       printf("\t\tunknown item %u offset %lu value %llu\n",
+                               i, i * sizeof(__le64),
+                               (unsigned long long)le64_to_cpu(values[i]));
+               }
+       }
+}
+
 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 {
        int i;
@@ -1264,7 +1289,9 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
                        printf(" offset %llu\n", (unsigned long long)offset);
                        switch (objectid) {
                        case BTRFS_DEV_STATS_OBJECTID:
-                               printf("\t\tdevice stats\n");
+                               print_dev_stats(l, btrfs_item_ptr(l, i,
+                                               struct btrfs_dev_stats_item),
+                                               btrfs_item_size(l, item));
                                break;
                        default:
                                printf("\t\tunknown persistent item objectid %llu\n",