[3.13.y-ckt,stable] Patch "Btrfs: don't use ram_bytes for uncompressed inline items" has been added to staging queue

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 0f8c095..f16fc1c 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2959,15 +2959,6 @@  BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
 		   other_encoding, 16);

-/* this returns the number of file bytes represented by the inline item.
- * If an item is compressed, this is the uncompressed size
- */
-static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
-					       struct btrfs_file_extent_item *e)
-{
-	return btrfs_file_extent_ram_bytes(eb, e);
-}
-
 /*
  * this returns the number of bytes used by the item on disk, minus the
  * size of any extent headers.  If a file is compressed on disk, this is
@@ -2981,6 +2972,32 @@  static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
 	return btrfs_item_size(eb, e) - offset;
 }

+/* this returns the number of file bytes represented by the inline item.
+ * If an item is compressed, this is the uncompressed size
+ */
+static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
+					       int slot,
+					       struct btrfs_file_extent_item *fi)
+{
+	struct btrfs_map_token token;
+
+	btrfs_init_map_token(&token);
+	/*
+	 * return the space used on disk if this item isn't
+	 * compressed or encoded
+	 */
+	if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
+	    btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
+	    btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
+		return btrfs_file_extent_inline_item_len(eb,
+							 btrfs_item_nr(slot));
+	}
+
+	/* otherwise use the ram bytes field */
+	return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
+}
+
+
 /* btrfs_dev_stats_item */
 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
 					struct btrfs_dev_stats_item *ptr,
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 9d0f7d4..9a0758d 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -774,7 +774,8 @@  next_slot:
 				btrfs_file_extent_num_bytes(leaf, fi);
 		} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 			extent_end = key.offset +
-				btrfs_file_extent_inline_len(leaf, fi);
+				btrfs_file_extent_inline_len(leaf,
+						     path->slots[0], fi);
 		} else {
 			/* can't happen */
 			BUG();
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e2319b2..0c56760 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1268,7 +1268,8 @@  next_slot:
 			nocow = 1;
 		} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 			extent_end = found_key.offset +
-				btrfs_file_extent_inline_len(leaf, fi);
+				btrfs_file_extent_inline_len(leaf,
+						     path->slots[0], fi);
 			extent_end = ALIGN(extent_end, root->sectorsize);
 		} else {
 			BUG_ON(1);
@@ -3954,7 +3955,7 @@  search_again:
 				    btrfs_file_extent_num_bytes(leaf, fi);
 			} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 				item_end += btrfs_file_extent_inline_len(leaf,
-									 fi);
+							 path->slots[0], fi);
 			}
 			item_end--;
 		}
@@ -4024,6 +4025,12 @@  search_again:
 					inode_sub_bytes(inode, item_end + 1 -
 							new_size);
 				}
+
+				/*
+				 * update the ram bytes to properly reflect
+				 * the new size of our item
+				 */
+				btrfs_set_file_extent_ram_bytes(leaf, fi, size);
 				size =
 				    btrfs_file_extent_calc_inline_size(size);
 				btrfs_truncate_item(root, path, size, 1);
@@ -6011,7 +6018,7 @@  again:
 		       btrfs_file_extent_num_bytes(leaf, item);
 	} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
 		size_t size;
-		size = btrfs_file_extent_inline_len(leaf, item);
+		size = btrfs_file_extent_inline_len(leaf, path->slots[0], item);
 		extent_end = ALIGN(extent_start + size, root->sectorsize);
 	}
 next:
@@ -6080,7 +6087,7 @@  next:
 			goto out;
 		}

-		size = btrfs_file_extent_inline_len(leaf, item);
+		size = btrfs_file_extent_inline_len(leaf, path->slots[0], item);
 		extent_offset = page_offset(page) + pg_offset - extent_start;
 		copy_size = min_t(u64, PAGE_CACHE_SIZE - pg_offset,
 				size - extent_offset);
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 417053b..512c8b0 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -249,7 +249,7 @@  void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 			    BTRFS_FILE_EXTENT_INLINE) {
 				printk(KERN_INFO "\t\tinline extent data "
 				       "size %u\n",
-				       btrfs_file_extent_inline_len(l, fi));
+				       btrfs_file_extent_inline_len(l, i, fi));
 				break;
 			}
 			printk(KERN_INFO "\t\textent data disk bytenr %llu "
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 945d1db..d553752 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1343,7 +1343,7 @@  static int read_symlink(struct btrfs_root *root,
 	BUG_ON(compression);

 	off = btrfs_file_extent_inline_start(ei);
-	len = btrfs_file_extent_inline_len(path->nodes[0], ei);
+	len = btrfs_file_extent_inline_len(path->nodes[0], path->slots[0], ei);

 	ret = fs_path_add_from_extent_buffer(dest, path->nodes[0], off, len);

@@ -3769,7 +3769,8 @@  static int send_write_or_clone(struct send_ctx *sctx,
 			struct btrfs_file_extent_item);
 	type = btrfs_file_extent_type(path->nodes[0], ei);
 	if (type == BTRFS_FILE_EXTENT_INLINE) {
-		len = btrfs_file_extent_inline_len(path->nodes[0], ei);
+		len = btrfs_file_extent_inline_len(path->nodes[0],
+						   path->slots[0], ei);
 		/*
 		 * it is possible the inline item won't cover the whole page,
 		 * but there may be items after this page.  Make
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 6e9d26f..52301cc 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -582,7 +582,7 @@  static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
 		if (btrfs_file_extent_disk_bytenr(eb, item) == 0)
 			nbytes = 0;
 	} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
-		size = btrfs_file_extent_inline_len(eb, item);
+		size = btrfs_file_extent_inline_len(eb, slot, item);
 		nbytes = btrfs_file_extent_ram_bytes(eb, item);
 		extent_end = ALIGN(start + size, root->sectorsize);
 	} else {