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[v5,50/52] btrfs: disable auto defrag on encrypted files

Message ID b717912bf88797b3044a3c2724b59b1ecc17ea78.1706116485.git.josef@toxicpanda.com (mailing list archive)
State New, archived
Headers show
Series btrfs: add fscrypt support | expand

Commit Message

Josef Bacik Jan. 24, 2024, 5:19 p.m. UTC 
We will drop the inode and re-look it up to do defrag with auto defrag,
which means we could lose the encryption policy.

Auto defrag needs to be reworked to just hold onto the inode for
scheduling later so we don't lose the context.  For now just disable it
if the file is encrypted.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/btrfs/defrag.c | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

diff --git a/fs/btrfs/defrag.c b/fs/btrfs/defrag.c
index c3be0d1203ba..1f538fb192d0 100644
--- a/fs/btrfs/defrag.c
+++ b/fs/btrfs/defrag.c
@@ -135,6 +135,14 @@  int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
 	if (!__need_auto_defrag(fs_info))
 		return 0;
 
+	/*
+	 * Since we have to read the inode at defrag time disable auto defrag
+	 * for encrypted inodes until we have code to read the parent and load
+	 * the encryption context.
+	 */
+	if (IS_ENCRYPTED(&inode->vfs_inode))
+		return 0;
+
 	if (test_bit(BTRFS_INODE_IN_DEFRAG, &inode->runtime_flags))
 		return 0;