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-rw-r--r--fs/btrfs/file-item.c40
1 files changed, 28 insertions, 12 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 6c849e8fd5a1..b618ad5339ba 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -1040,18 +1040,7 @@ void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
btrfs_item_key_to_cpu(leaf, &key, slot);
extent_start = key.offset;
-
- if (type == BTRFS_FILE_EXTENT_REG ||
- type == BTRFS_FILE_EXTENT_PREALLOC) {
- extent_end = extent_start +
- btrfs_file_extent_num_bytes(leaf, fi);
- } else if (type == BTRFS_FILE_EXTENT_INLINE) {
- size_t size;
- size = btrfs_file_extent_ram_bytes(leaf, fi);
- extent_end = ALIGN(extent_start + size,
- fs_info->sectorsize);
- }
-
+ extent_end = btrfs_file_extent_end(path);
em->ram_bytes = btrfs_file_extent_ram_bytes(leaf, fi);
if (type == BTRFS_FILE_EXTENT_REG ||
type == BTRFS_FILE_EXTENT_PREALLOC) {
@@ -1098,3 +1087,30 @@ void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
root->root_key.objectid);
}
}
+
+/*
+ * Returns the end offset (non inclusive) of the file extent item the given path
+ * points to. If it points to an inline extent, the returned offset is rounded
+ * up to the sector size.
+ */
+u64 btrfs_file_extent_end(const struct btrfs_path *path)
+{
+ const struct extent_buffer *leaf = path->nodes[0];
+ const int slot = path->slots[0];
+ struct btrfs_file_extent_item *fi;
+ struct btrfs_key key;
+ u64 end;
+
+ btrfs_item_key_to_cpu(leaf, &key, slot);
+ ASSERT(key.type == BTRFS_EXTENT_DATA_KEY);
+ fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
+
+ if (btrfs_file_extent_type(leaf, fi) == BTRFS_FILE_EXTENT_INLINE) {
+ end = btrfs_file_extent_ram_bytes(leaf, fi);
+ end = ALIGN(key.offset + end, leaf->fs_info->sectorsize);
+ } else {
+ end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
+ }
+
+ return end;
+}