[PATCH v3] fs: fsconfig: intercept non-new mount API in advance for FSCONFIG_CMD_CREATE_EXCL command

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fsconfig with FSCONFIG_CMD_CREATE_EXCL command requires the new mount api,
here we should return -EOPNOTSUPP in advance to avoid extra procedure.

Signed-off-by: Hongbo Li <lihongbo22@xxxxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
---
v3:
  - Add reviewed-by.

v2: https://lore.kernel.org/all/20240522030422.315892-1-lihongbo22@xxxxxxxxxx/
  - Fix misspelling and change the target branch.

v1: https://lore.kernel.org/all/20240511062147.3312801-1-lihongbo22@xxxxxxxxxx/T/
---
 fs/fsopen.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/fs/fsopen.c b/fs/fsopen.c
index 6593ae518115..18fe979da7e2 100644
--- a/fs/fsopen.c
+++ b/fs/fsopen.c
@@ -220,10 +220,6 @@ static int vfs_cmd_create(struct fs_context *fc, bool exclusive)
 	if (!mount_capable(fc))
 		return -EPERM;
 
-	/* require the new mount api */
-	if (exclusive && fc->ops == &legacy_fs_context_ops)
-		return -EOPNOTSUPP;
-
 	fc->phase = FS_CONTEXT_CREATING;
 	fc->exclusive = exclusive;
 
@@ -411,6 +407,7 @@ SYSCALL_DEFINE5(fsconfig,
 		case FSCONFIG_SET_PATH:
 		case FSCONFIG_SET_PATH_EMPTY:
 		case FSCONFIG_SET_FD:
+		case FSCONFIG_CMD_CREATE_EXCL:
 			ret = -EOPNOTSUPP;
 			goto out_f;
 		}
-- 
2.34.1





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