In Ubuntu 20, I use the demo code in attachment “hello.c” to show the files in a directory, but when I upgraded to Ubuntu 22.04(Linux kernel version 6.8.0-49), it doesn’t work, I found the structure definition of dentry in dcache.h changed, and the demo compilation failed, so how can I list a directory in Ubuntu 22+ in the kernel?
Your question is very advanced and it might be difficult to get help here.
I do observe that you use dentry->d_subdirs and some others that have been renamed, and potentially changed in what they do.
OLD:
};
struct list_head d_child; /* child of parent list */
struct list_head d_subdirs; /* our children */
NEW:
};
struct hlist_node d_sib; /* child of parent list */
struct hlist_head d_children; /* our children */
You would have to find and look at the commits that made the changes to understand if your code can be made to work again.
