108 #include <net/scm.h>
119 #include "scm.h"
187 static void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)  in unix_get_secdata()  argument
189 	UNIXCB(skb).secid = scm->secid;  in unix_get_secdata()
192 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)  in unix_set_secdata()  argument
194 	scm->secid = UNIXCB(skb).secid;  in unix_set_secdata()
197 static inline bool unix_secdata_eq(struct scm_cookie *scm, struct sk_buff *skb)  in unix_secdata_eq()  argument
199 	return (scm->secid == UNIXCB(skb).secid);  in unix_secdata_eq()
202 static inline void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)  in unix_get_secdata()  argument
205 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)  in unix_set_secdata()  argument
208 static inline bool unix_secdata_eq(struct scm_cookie *scm, struct sk_buff *skb)  in unix_secdata_eq()  argument
1754 static void unix_peek_fds(struct scm_cookie *scm, struct sk_buff *skb)  in unix_peek_fds()  argument
1756 	scm->fp = scm_fp_dup(UNIXCB(skb).fp);  in unix_peek_fds()
1801 static int unix_scm_to_skb(struct scm_cookie *scm, struct sk_buff *skb, bool send_fds)  in unix_scm_to_skb()  argument
1805 	UNIXCB(skb).pid  = get_pid(scm->pid);  in unix_scm_to_skb()
1806 	UNIXCB(skb).uid = scm->creds.uid;  in unix_scm_to_skb()
1807 	UNIXCB(skb).gid = scm->creds.gid;  in unix_scm_to_skb()
1809 	unix_get_secdata(scm, skb);  in unix_scm_to_skb()
1810 	if (scm->fp && send_fds)  in unix_scm_to_skb()
1811 		err = unix_attach_fds(scm, skb);  in unix_scm_to_skb()
1841 static int maybe_init_creds(struct scm_cookie *scm,  in maybe_init_creds()  argument
1848 	err = scm_send(socket, &msg, scm, false);  in maybe_init_creds()
1853 		scm->pid = get_pid(task_tgid(current));  in maybe_init_creds()
1854 		current_uid_gid(&scm->creds.uid, &scm->creds.gid);  in maybe_init_creds()
1860 			    struct scm_cookie *scm)  in unix_skb_scm_eq()  argument
1862 	return UNIXCB(skb).pid == scm->pid &&  in unix_skb_scm_eq()
1863 	       uid_eq(UNIXCB(skb).uid, scm->creds.uid) &&  in unix_skb_scm_eq()
1864 	       gid_eq(UNIXCB(skb).gid, scm->creds.gid) &&  in unix_skb_scm_eq()
1865 	       unix_secdata_eq(scm, skb);  in unix_skb_scm_eq()
1896 	struct scm_cookie scm;  in unix_dgram_sendmsg()  local
1904 	err = scm_send(sock, msg, &scm, false);  in unix_dgram_sendmsg()
1949 	err = unix_scm_to_skb(&scm, skb, true);  in unix_dgram_sendmsg()
2078 	scm_destroy(&scm);  in unix_dgram_sendmsg()
2090 	scm_destroy(&scm);  in unix_dgram_sendmsg()
2154 	struct scm_cookie scm;  in unix_stream_sendmsg()  local
2159 	err = scm_send(sock, msg, &scm, false);  in unix_stream_sendmsg()
2206 		err = unix_scm_to_skb(&scm, skb, !fds_sent);  in unix_stream_sendmsg()
2245 	scm_destroy(&scm);  in unix_stream_sendmsg()
2257 	scm_destroy(&scm);  in unix_stream_sendmsg()
2267 	struct scm_cookie scm;  in unix_stream_sendpage()  local
2313 		err = maybe_init_creds(&scm, socket, other);  in unix_stream_sendpage()
2322 	} else if (!skb || !unix_skb_scm_eq(skb, &scm)) {  in unix_stream_sendpage()
2349 		err = unix_scm_to_skb(&scm, skb, false);  in unix_stream_sendpage()
2361 	scm_destroy(&scm);  in unix_stream_sendpage()
2373 		scm_destroy(&scm);  in unix_stream_sendpage()
2420 	struct scm_cookie scm;  in __unix_dgram_recvmsg()  local
2484 	memset(&scm, 0, sizeof(scm));  in __unix_dgram_recvmsg()
2486 	scm_set_cred(&scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);  in __unix_dgram_recvmsg()
2487 	unix_set_secdata(&scm, skb);  in __unix_dgram_recvmsg()
2491 			unix_detach_fds(&scm, skb);  in __unix_dgram_recvmsg()
2511 			unix_peek_fds(&scm, skb);  in __unix_dgram_recvmsg()
2515 	scm_recv(sock, msg, &scm, flags);  in __unix_dgram_recvmsg()
2694 	struct scm_cookie scm;  in unix_stream_read_generic()  local
2725 	memset(&scm, 0, sizeof(scm));  in unix_stream_read_generic()
2787 				scm_destroy(&scm);  in unix_stream_read_generic()
2811 			if (!unix_skb_scm_eq(skb, &scm))  in unix_stream_read_generic()
2815 			scm_set_cred(&scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);  in unix_stream_read_generic()
2816 			unix_set_secdata(&scm, skb);  in unix_stream_read_generic()
2862 				unix_detach_fds(&scm, skb);  in unix_stream_read_generic()
2871 			if (scm.fp)  in unix_stream_read_generic()
2877 				unix_peek_fds(&scm, skb);  in unix_stream_read_generic()
2898 		scm_recv(sock, state->msg, &scm, flags);  in unix_stream_read_generic()
2900 		scm_destroy(&scm);  in unix_stream_read_generic()