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 | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index fe7bf4a..32022f3 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -155,6 +155,25 @@ static void print_extent_ref_v0(struct extent_buffer *eb,
int slot)
}
#endif
+static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
+ u32 item_size)
+{
+ if (!IS_ALIGNED(item_size, sizeof(u64))) {
+ pr_warn("btrfs: uuid item with illegal size %lu!\n",
+ (unsigned long)item_size);
+ return;
+ }
+ while (item_size) {
+ __le64 subvol_id;
+
+ read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
+ printk(KERN_INFO "\t\tsubvol_id %llu\n",
+ (unsigned long long)le64_to_cpu(subvol_id));
+ item_size -= sizeof(u64);
+ offset += sizeof(u64);
+ }
+}
+
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
int i;
@@ -301,6 +320,11 @@ 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_SUBVOL:
+ case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
+ print_uuid_item(l, btrfs_item_ptr_offset(l, i),
+ btrfs_item_size_nr(l, i));
+ break;
};
}
}
--
1.8.3.4
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