btrfs: remove new_inline argument from btrfs_extent_item_to_extent_map()

The argument @new_inline changes the following members of extent_map:

- em->compress_type
- EXTENT_FLAG_COMPRESSED of em->flags

However neither members makes a difference for inline extents:

- Inline extent read never use above em members

  As inside btrfs_get_extent() we directly use the file extent item to
  do the read.

- Inline extents are never to be split

  Thus code really needs em->compress_type or that flag will never be
  executed on inlined extents.
  (btrfs_drop_extent_cache() would be one example)

- Fiemap no longer relies on extent maps

  Recent fiemap optimization makes fiemap to search subvolume tree
  directly, without using any extent map at all.

  Thus those members make no difference for inline extents any more.

Furthermore such exception without much explanation is really a source
of confusion.

Thus this patch will completely remove the argument, and always set the
involved members, unifying the behavior.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

4 files changed, 4 insertions, 7 deletions

diff --git a/fs/btrfs/defrag.c b/fs/btrfs/defrag.c
index 48a9460d49c7..919dfe0f7e50 100644
--- a/fs/btrfs/defrag.c
+++ b/fs/btrfs/defrag.c
@@ -582,7 +582,7 @@ iterate:
 			goto next;
 
 		/* Now this extent covers @start, convert it to em */
-		btrfs_extent_item_to_extent_map(inode, &path, fi, false, em);
+		btrfs_extent_item_to_extent_map(inode, &path, fi, em);
 		break;
 next:
 		ret = btrfs_next_item(root, &path);
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 036d50af5666..456f71b42a9c 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -1214,7 +1214,6 @@ out:
 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
 				     const struct btrfs_path *path,
 				     struct btrfs_file_extent_item *fi,
-				     const bool new_inline,
 				     struct extent_map *em)
 {
 	struct btrfs_fs_info *fs_info = inode->root->fs_info;
@@ -1266,10 +1265,9 @@ void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
 		 */
 		em->orig_start = EXTENT_MAP_HOLE;
 		em->block_len = (u64)-1;
-		if (!new_inline && compress_type != BTRFS_COMPRESS_NONE) {
+		em->compress_type = compress_type;
+		if (compress_type != BTRFS_COMPRESS_NONE)
 			set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
-			em->compress_type = compress_type;
-		}
 	} else {
 		btrfs_err(fs_info,
 			  "unknown file extent item type %d, inode %llu, offset %llu, "
diff --git a/fs/btrfs/file-item.h b/fs/btrfs/file-item.h
index 51cd3ab5948c..ba12711cf933 100644
--- a/fs/btrfs/file-item.h
+++ b/fs/btrfs/file-item.h
@@ -24,7 +24,6 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
 				     const struct btrfs_path *path,
 				     struct btrfs_file_extent_item *fi,
-				     const bool new_inline,
 				     struct extent_map *em);
 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
 					u64 len);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5b45eb141215..0ab899132dbf 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7058,7 +7058,7 @@ next:
 		goto insert;
 	}
 
-	btrfs_extent_item_to_extent_map(inode, path, item, !page, em);
+	btrfs_extent_item_to_extent_map(inode, path, item, em);
 
 	if (extent_type == BTRFS_FILE_EXTENT_REG ||
 	    extent_type == BTRFS_FILE_EXTENT_PREALLOC) {