[PATCH v2 3/4] btrfs: opt-in for IOP_MAY_FAST_EXEC
From: Mateusz Guzik
Date: Thu Nov 06 2025 - 13:01:19 EST
Signed-off-by: Mateusz Guzik <mjguzik@xxxxxxxxx>
---
fs/btrfs/inode.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 42da39c1e5b5..42df687a0126 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5852,6 +5852,8 @@ struct btrfs_inode *btrfs_iget(u64 ino, struct btrfs_root *root)
if (ret)
return ERR_PTR(ret);
+ if (S_ISDIR(inode->vfs_inode.i_mode))
+ inode_enable_fast_may_exec(&inode->vfs_inode);
unlock_new_inode(&inode->vfs_inode);
return inode;
}
@@ -6803,8 +6805,11 @@ static int btrfs_create_common(struct inode *dir, struct dentry *dentry,
}
ret = btrfs_create_new_inode(trans, &new_inode_args);
- if (!ret)
+ if (!ret) {
+ if (S_ISDIR(inode->i_mode))
+ inode_enable_fast_may_exec(inode);
d_instantiate_new(dentry, inode);
+ }
btrfs_end_transaction(trans);
btrfs_btree_balance_dirty(fs_info);
@@ -9163,6 +9168,11 @@ int btrfs_prealloc_file_range_trans(struct inode *inode,
min_size, actual_len, alloc_hint, trans);
}
+/*
+ * NOTE: in case you are adding MAY_EXEC check for directories:
+ * inode_enable_fast_may_exec() is issued when inodes get instantiated, meaning
+ * calls to this place can be elided.
+ */
static int btrfs_permission(struct mnt_idmap *idmap,
struct inode *inode, int mask)
{
--
2.48.1