This commit adds support to print UUID tree elements to print-tree.c.
Signed-off-by: Stefan Behrens <sbehr...@giantdisaster.de>
---
fs/btrfs/print-tree.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 82 insertions(+)
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index dc0024f..121cf64 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -155,6 +155,82 @@ static void print_extent_ref_v0(struct extent_buffer *eb,
int slot)
}
#endif
+static void print_uuid_item(struct extent_buffer *l,
+ struct btrfs_uuid_item *ptr,
+ u32 item_size)
+{
+ do {
+ u64 sub_item_type;
+ u64 sub_item_len;
+ u64 subvol_id;
+ unsigned long offset;
+
+ if (item_size < sizeof(*ptr)) {
+ printk(KERN_INFO
+ "btrfs: uuid item too short (%llu < %d)!\n",
+ (unsigned long long)item_size,
+ (int)sizeof(*ptr));
+ return;
+ }
+ sub_item_type = btrfs_uuid_type(l, ptr);
+ sub_item_len = btrfs_uuid_len(l, ptr);
+ ptr++;
+ item_size -= sizeof(*ptr);
+
+ if (sub_item_len * sizeof(u64) > item_size) {
+ printk(KERN_INFO
+ "btrfs: uuid item too short (%llu > %llu)!\n",
+ (unsigned long long)(sub_item_len * 8),
+ (unsigned long long)item_size);
+ return;
+ }
+
+ offset = (unsigned long)ptr;
+ ptr = (struct btrfs_uuid_item *)
+ (((char *)ptr) + sub_item_len * sizeof(u64));
+ item_size -= sub_item_len * sizeof(u64);
+ switch (sub_item_type) {
+ case BTRFS_UUID_ITEM_TYPE_SUBVOL:
+ while (sub_item_len) {
+ read_extent_buffer(l, &subvol_id, offset,
+ sizeof(u64));
+ printk(KERN_INFO "\t\tsubvol_id %llu\n",
+ (unsigned long long)
+ le64_to_cpu(subvol_id));
+ sub_item_len--;
+ offset += sizeof(u64);
+ }
+ break;
+ case BTRFS_UUID_ITEM_TYPE_RECEIVED_SUBVOL:
+ while (sub_item_len) {
+ read_extent_buffer(l, &subvol_id, offset,
+ sizeof(u64));
+ printk(KERN_INFO
+ "\t\treceived_subvol_id %llu\n",
+ (unsigned long long)
+ le64_to_cpu(subvol_id));
+ sub_item_len--;
+ offset += sizeof(u64);
+ }
+ break;
+ default:
+ printk(KERN_INFO "\t\tunknown type=%llu, len=8*%llu\n",
+ (unsigned long long)sub_item_type,
+ (unsigned long long)sub_item_len);
+ while (sub_item_len) {
+ read_extent_buffer(l, &subvol_id, offset,
+ sizeof(u64));
+ printk(KERN_INFO "\t\tid %llu\n",
+ (unsigned long long)
+ le64_to_cpu(subvol_id));
+ sub_item_len--;
+ offset += sizeof(u64);
+ }
+ break;
+ }
+ } while (item_size);
+}
+
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
int i;
@@ -168,6 +244,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct
extent_buffer *l)
struct btrfs_extent_data_ref *dref;
struct btrfs_shared_data_ref *sref;
struct btrfs_dev_extent *dev_extent;
+ struct btrfs_uuid_item *uuid_item;
struct btrfs_key key;
struct btrfs_key found_key;
@@ -301,6 +378,11 @@ void btrfs_print_leaf(struct btrfs_root *root, struct
extent_buffer *l)
case BTRFS_DEV_REPLACE_KEY:
printk(KERN_INFO "\t\tdev replace\n");
break;
+ case BTRFS_UUID_KEY:
+ uuid_item = btrfs_item_ptr(l, i,
+ struct btrfs_uuid_item);
+ print_uuid_item(l, uuid_item, btrfs_item_size_nr(l, i));
+ break;
};
}
}
--
1.8.2.2
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