btrfs: use a flag to control when to clear the file extent range

We only care about updating the file extent range when we are doing a
normal truncation.  We skip this for tree logging currently, but we can
also skip this for eviction as well.  Using a flag makes it more
explicit when we want to do this work.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index d2f4716..3a6bf36 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -294,6 +294,7 @@ int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
        struct btrfs_truncate_control control = {
                .new_size = 0,
                .min_type = BTRFS_EXTENT_DATA_KEY,
+               .clear_extent_range = true,
        };
        struct btrfs_inode *inode = BTRFS_I(vfs_inode);
        struct btrfs_root *root = inode->root;

diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c
index 4c75341..5598090 100644 (file)
--- a/fs/btrfs/inode-item.c
+++ b/fs/btrfs/inode-item.c
@@ -624,11 +624,11 @@ search_again:
                }
 delete:
                /*
-                * We use btrfs_truncate_inode_items() to clean up log trees for
-                * multiple fsyncs, and in this case we don't want to clear the
-                * file extent range because it's just the log.
+                * We only want to clear the file extent range if we're
+                * modifying the actual inode's mapping, which is just the
+                * normal truncate path.
                 */
-               if (root == inode->root) {
+               if (control->clear_extent_range) {
                        ret = btrfs_inode_clear_file_extent_range(inode,
                                                  clear_start, clear_len);
                        if (ret) {

diff --git a/fs/btrfs/inode-item.h b/fs/btrfs/inode-item.h
index 1f31bb4..5817ba4 100644 (file)
--- a/fs/btrfs/inode-item.h
+++ b/fs/btrfs/inode-item.h
@@ -43,6 +43,12 @@ struct btrfs_truncate_control {
         * extents we drop.
         */
        bool skip_ref_updates;
+
+       /*
+        * IN: true if we need to clear the file extent range for the inode as
+        * we drop the file extent items.
+        */
+       bool clear_extent_range;
 };
 
 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 38f974b..1a3f40b 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8534,6 +8534,7 @@ static int btrfs_truncate(struct inode *inode, bool skip_writeback)
 {
        struct btrfs_truncate_control control = {
                .min_type = BTRFS_EXTENT_DATA_KEY,
+               .clear_extent_range = true,
        };
        struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
        struct btrfs_root *root = BTRFS_I(inode)->root;