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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/net/scm.h
1 #ifndef __LINUX_NET_SCM_H
2 #define __LINUX_NET_SCM_H
4 #include <linux/limits.h>
7 /* Well, we should have at least one descriptor open
8 * to accept passed FDs 8)
10 #define SCM_MAX_FD (OPEN_MAX-1)
15 struct file
*fp
[SCM_MAX_FD
];
20 struct ucred creds
; /* Skb credentials */
21 struct scm_fp_list
*fp
; /* Passed files */
22 unsigned long seq
; /* Connection seqno */
25 extern void scm_detach_fds(struct msghdr
*msg
, struct scm_cookie
*scm
);
26 extern void scm_detach_fds_compat(struct msghdr
*msg
, struct scm_cookie
*scm
);
27 extern int __scm_send(struct socket
*sock
, struct msghdr
*msg
, struct scm_cookie
*scm
);
28 extern void __scm_destroy(struct scm_cookie
*scm
);
29 extern struct scm_fp_list
* scm_fp_dup(struct scm_fp_list
*fpl
);
31 static __inline__
void scm_destroy(struct scm_cookie
*scm
)
37 static __inline__
int scm_send(struct socket
*sock
, struct msghdr
*msg
,
38 struct scm_cookie
*scm
)
40 struct task_struct
*p
= current
;
41 scm
->creds
.uid
= p
->uid
;
42 scm
->creds
.gid
= p
->gid
;
43 scm
->creds
.pid
= p
->tgid
;
46 if (msg
->msg_controllen
<= 0)
48 return __scm_send(sock
, msg
, scm
);
51 static __inline__
void scm_recv(struct socket
*sock
, struct msghdr
*msg
,
52 struct scm_cookie
*scm
, int flags
)
54 if (!msg
->msg_control
)
56 if (test_bit(SOCK_PASSCRED
, &sock
->flags
) || scm
->fp
)
57 msg
->msg_flags
|= MSG_CTRUNC
;
62 if (test_bit(SOCK_PASSCRED
, &sock
->flags
))
63 put_cmsg(msg
, SOL_SOCKET
, SCM_CREDENTIALS
, sizeof(scm
->creds
), &scm
->creds
);
68 scm_detach_fds(msg
, scm
);
72 #endif /* __LINUX_NET_SCM_H */