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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/bpfilter.h
..
..
@@ -3,13 +3,23 @@
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 #define _LINUX_BPFILTER_H
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 #include <uapi/linux/bpfilter.h>
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+#include <linux/usermode_driver.h>
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+#include <linux/sockptr.h>
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 struct sock;
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-int bpfilter_ip_set_sockopt(struct sock *sk, int optname, char __user *optval,
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+int bpfilter_ip_set_sockopt(struct sock *sk, int optname, sockptr_t optval,
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 			    unsigned int optlen);
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 int bpfilter_ip_get_sockopt(struct sock *sk, int optname, char __user *optval,
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 			    int __user *optlen);
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-extern int (*bpfilter_process_sockopt)(struct sock *sk, int optname,
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-				       char __user *optval,
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-				       unsigned int optlen, bool is_set);
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+void bpfilter_umh_cleanup(struct umd_info *info);
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+
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+struct bpfilter_umh_ops {
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+	struct umd_info info;
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+	/* since ip_getsockopt() can run in parallel, serialize access to umh */
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+	struct mutex lock;
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+	int (*sockopt)(struct sock *sk, int optname, sockptr_t optval,
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+		       unsigned int optlen, bool is_set);
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+	int (*start)(void);
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+};
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+extern struct bpfilter_umh_ops bpfilter_ops;
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 #endif