Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (23 commits)
  Btrfs: fix extent_buffer leak during tree log replay
  Btrfs: fix oops when btrfs_inherit_iflags called with a NULL dir
  Btrfs: fix -o nodatasum printk spelling
  Btrfs: check duplicate backrefs for both data and metadata
  Btrfs: init worker struct fields before kthread-run
  Btrfs: pin buffers during write_dev_supers
  Btrfs: avoid races between super writeout and device list updates
  Fix btrfs when ACLs are configured out
  Btrfs: fdatasync should skip metadata writeout
  Btrfs: remove crc32c.h and use libcrc32c directly.
  Btrfs: implement FS_IOC_GETFLAGS/SETFLAGS/GETVERSION
  Btrfs: autodetect SSD devices
  Btrfs: add mount -o ssd_spread to spread allocations out
  Btrfs: avoid allocation clusters that are too spread out
  Btrfs: Add mount -o nossd
  Btrfs: avoid IO stalls behind congested devices in a multi-device FS
  Btrfs: don't allow WRITE_SYNC bios to starve out regular writes
  Btrfs: fix metadata dirty throttling limits
  Btrfs: reduce mount -o ssd CPU usage
  Btrfs: balance btree more often
  ...

1 files changed, 138 insertions, 17 deletions

diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 5f8f218c1005..6d6523da0a30 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -45,22 +45,132 @@ static void print_dev_item(struct extent_buffer *eb,
                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
 }
+static void print_extent_data_ref(struct extent_buffer *eb,
+                                  struct btrfs_extent_data_ref *ref)
+{
+        printk(KERN_INFO "\t\textent data backref root %llu "
+               "objectid %llu offset %llu count %u\n",
+               (unsigned long long)btrfs_extent_data_ref_root(eb, ref),
+               (unsigned long long)btrfs_extent_data_ref_objectid(eb, ref),
+               (unsigned long long)btrfs_extent_data_ref_offset(eb, ref),
+               btrfs_extent_data_ref_count(eb, ref));
+}
+
+static void print_extent_item(struct extent_buffer *eb, int slot)
+{
+        struct btrfs_extent_item *ei;
+        struct btrfs_extent_inline_ref *iref;
+        struct btrfs_extent_data_ref *dref;
+        struct btrfs_shared_data_ref *sref;
+        struct btrfs_disk_key key;
+        unsigned long end;
+        unsigned long ptr;
+        int type;
+        u32 item_size = btrfs_item_size_nr(eb, slot);
+        u64 flags;
+        u64 offset;
+
+        if (item_size < sizeof(*ei)) {
+#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
+                struct btrfs_extent_item_v0 *ei0;
+                BUG_ON(item_size != sizeof(*ei0));
+                ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
+                printk(KERN_INFO "\t\textent refs %u\n",
+                       btrfs_extent_refs_v0(eb, ei0));
+                return;
+#else
+                BUG();
+#endif
+        }
+
+        ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
+        flags = btrfs_extent_flags(eb, ei);
+
+        printk(KERN_INFO "\t\textent refs %llu gen %llu flags %llu\n",
+               (unsigned long long)btrfs_extent_refs(eb, ei),
+               (unsigned long long)btrfs_extent_generation(eb, ei),
+               (unsigned long long)flags);
+
+        if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
+                struct btrfs_tree_block_info *info;
+                info = (struct btrfs_tree_block_info *)(ei + 1);
+                btrfs_tree_block_key(eb, info, &key);
+                printk(KERN_INFO "\t\ttree block key (%llu %x %llu) "
+                       "level %d\n",
+                       (unsigned long long)btrfs_disk_key_objectid(&key),
+                       key.type,
+                       (unsigned long long)btrfs_disk_key_offset(&key),
+                       btrfs_tree_block_level(eb, info));
+                iref = (struct btrfs_extent_inline_ref *)(info + 1);
+        } else {
+                iref = (struct btrfs_extent_inline_ref *)(ei + 1);
+        }
+
+        ptr = (unsigned long)iref;
+        end = (unsigned long)ei + item_size;
+        while (ptr < end) {
+                iref = (struct btrfs_extent_inline_ref *)ptr;
+                type = btrfs_extent_inline_ref_type(eb, iref);
+                offset = btrfs_extent_inline_ref_offset(eb, iref);
+                switch (type) {
+                case BTRFS_TREE_BLOCK_REF_KEY:
+                        printk(KERN_INFO "\t\ttree block backref "
+                                "root %llu\n", (unsigned long long)offset);
+                        break;
+                case BTRFS_SHARED_BLOCK_REF_KEY:
+                        printk(KERN_INFO "\t\tshared block backref "
+                                "parent %llu\n", (unsigned long long)offset);
+                        break;
+                case BTRFS_EXTENT_DATA_REF_KEY:
+                        dref = (struct btrfs_extent_data_ref *)(&iref->offset);
+                        print_extent_data_ref(eb, dref);
+                        break;
+                case BTRFS_SHARED_DATA_REF_KEY:
+                        sref = (struct btrfs_shared_data_ref *)(iref + 1);
+                        printk(KERN_INFO "\t\tshared data backref "
+                               "parent %llu count %u\n",
+                               (unsigned long long)offset,
+                               btrfs_shared_data_ref_count(eb, sref));
+                        break;
+                default:
+                        BUG();
+                }
+                ptr += btrfs_extent_inline_ref_size(type);
+        }
+        WARN_ON(ptr > end);
+}
+
+#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
+static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
+{
+        struct btrfs_extent_ref_v0 *ref0;
+
+        ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
+        printk("\t\textent back ref root %llu gen %llu "
+                "owner %llu num_refs %lu\n",
+                (unsigned long long)btrfs_ref_root_v0(eb, ref0),
+                (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
+                (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
+                (unsigned long)btrfs_ref_count_v0(eb, ref0));
+}
+#endif
+
 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 {
         int i;
+        u32 type;
         u32 nr = btrfs_header_nritems(l);
         struct btrfs_item *item;
-        struct btrfs_extent_item *ei;
         struct btrfs_root_item *ri;
         struct btrfs_dir_item *di;
         struct btrfs_inode_item *ii;
         struct btrfs_block_group_item *bi;
         struct btrfs_file_extent_item *fi;
+        struct btrfs_extent_data_ref *dref;
+        struct btrfs_shared_data_ref *sref;
+        struct btrfs_dev_extent *dev_extent;
         struct btrfs_key key;
         struct btrfs_key found_key;
-        struct btrfs_extent_ref *ref;
-        struct btrfs_dev_extent *dev_extent;
-        u32 type;
 
         printk(KERN_INFO "leaf %llu total ptrs %d free space %d\n",
                 (unsigned long long)btrfs_header_bytenr(l), nr,
@@ -100,20 +210,25 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
                                 btrfs_disk_root_refs(l, ri));
                         break;
                 case BTRFS_EXTENT_ITEM_KEY:
-                        ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
-                        printk(KERN_INFO "\t\textent data refs %u\n",
-                                btrfs_extent_refs(l, ei));
-                        break;
-                case BTRFS_EXTENT_REF_KEY:
-                        ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
-                        printk(KERN_INFO "\t\textent back ref root %llu "
-                               "gen %llu owner %llu num_refs %lu\n",
-                               (unsigned long long)btrfs_ref_root(l, ref),
-                               (unsigned long long)btrfs_ref_generation(l, ref),
-                               (unsigned long long)btrfs_ref_objectid(l, ref),
-                               (unsigned long)btrfs_ref_num_refs(l, ref));
+                        print_extent_item(l, i);
+                        break;
+                case BTRFS_TREE_BLOCK_REF_KEY:
+                        printk(KERN_INFO "\t\ttree block backref\n");
+                        break;
+                case BTRFS_SHARED_BLOCK_REF_KEY:
+                        printk(KERN_INFO "\t\tshared block backref\n");
+                        break;
+                case BTRFS_EXTENT_DATA_REF_KEY:
+                        dref = btrfs_item_ptr(l, i,
+                                              struct btrfs_extent_data_ref);
+                        print_extent_data_ref(l, dref);
+                        break;
+                case BTRFS_SHARED_DATA_REF_KEY:
+                        sref = btrfs_item_ptr(l, i,
+                                              struct btrfs_shared_data_ref);
+                        printk(KERN_INFO "\t\tshared data backref count %u\n",
+                               btrfs_shared_data_ref_count(l, sref));
                         break;
-
                 case BTRFS_EXTENT_DATA_KEY:
                         fi = btrfs_item_ptr(l, i,
                                             struct btrfs_file_extent_item);
@@ -139,6 +254,12 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
                                (unsigned long long)
                                btrfs_file_extent_ram_bytes(l, fi));
                         break;
+                case BTRFS_EXTENT_REF_V0_KEY:
+#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
+                        print_extent_ref_v0(l, i);
+#else
+                        BUG();
+#endif
                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
                         bi = btrfs_item_ptr(l, i,
                                             struct btrfs_block_group_item);