Btrfs: Add support for multiple devices per filesystem
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index da0b4dc..9c1335d 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -20,6 +20,40 @@
#include "disk-io.h"
#include "print-tree.h"
+static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
+{
+ int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
+ int i;
+ printk("\t\tchunk owner %llu type %llu num_stripes %d\n",
+ (unsigned long long)btrfs_chunk_owner(eb, chunk),
+ (unsigned long long)btrfs_chunk_type(eb, chunk),
+ num_stripes);
+ for (i = 0 ; i < num_stripes ; i++) {
+ printk("\t\t\tstripe %d devid %llu offset %llu\n", i,
+ (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
+ (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
+ }
+}
+static void print_dev_item(struct extent_buffer *eb,
+ struct btrfs_dev_item *dev_item)
+{
+ char *name;
+ int name_len;
+
+ name_len = btrfs_device_name_len(eb, dev_item);
+ name = kmalloc(name_len, GFP_NOFS);
+ if (name) {
+ read_extent_buffer(eb, name,
+ (unsigned long)btrfs_device_name(dev_item),
+ name_len);
+ }
+ printk("\t\tdev item name %.*s devid %llu "
+ "total_bytes %llu bytes used %Lu\n", name_len, name,
+ (unsigned long long)btrfs_device_id(eb, dev_item),
+ (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
+ (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
+ kfree(name);
+}
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
int i;
@@ -34,6 +68,7 @@
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_extent_ref *ref;
+ struct btrfs_dev_extent *dev_extent;
u32 type;
printk("leaf %llu total ptrs %d free space %d\n",
@@ -106,6 +141,19 @@
printk("\t\tblock group used %llu\n",
(unsigned long long)btrfs_disk_block_group_used(l, bi));
break;
+ case BTRFS_CHUNK_ITEM_KEY:
+ print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
+ break;
+ case BTRFS_DEV_ITEM_KEY:
+ print_dev_item(l, btrfs_item_ptr(l, i,
+ struct btrfs_dev_item));
+ break;
+ case BTRFS_DEV_EXTENT_KEY:
+ dev_extent = btrfs_item_ptr(l, i,
+ struct btrfs_dev_extent);
+ printk("\t\tdev extent owner %llu length %llu\n",
+ (unsigned long long)btrfs_dev_extent_owner(l, dev_extent),
+ (unsigned long long)btrfs_dev_extent_length(l, dev_extent));
};
}
}