diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/net/scm.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/net/scm.h')
-rw-r--r-- | kernel/include/net/scm.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/kernel/include/net/scm.h b/kernel/include/net/scm.h new file mode 100644 index 000000000..262532d11 --- /dev/null +++ b/kernel/include/net/scm.h @@ -0,0 +1,141 @@ +#ifndef __LINUX_NET_SCM_H +#define __LINUX_NET_SCM_H + +#include <linux/limits.h> +#include <linux/net.h> +#include <linux/security.h> +#include <linux/pid.h> +#include <linux/nsproxy.h> + +/* Well, we should have at least one descriptor open + * to accept passed FDs 8) + */ +#define SCM_MAX_FD 253 + +struct scm_creds { + u32 pid; + kuid_t uid; + kgid_t gid; +}; + +struct scm_fp_list { + short count; + short max; + struct file *fp[SCM_MAX_FD]; +}; + +struct scm_cookie { + struct pid *pid; /* Skb credentials */ + struct scm_fp_list *fp; /* Passed files */ + struct scm_creds creds; /* Skb credentials */ +#ifdef CONFIG_SECURITY_NETWORK + u32 secid; /* Passed security ID */ +#endif +}; + +void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm); +void scm_detach_fds_compat(struct msghdr *msg, struct scm_cookie *scm); +int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm); +void __scm_destroy(struct scm_cookie *scm); +struct scm_fp_list *scm_fp_dup(struct scm_fp_list *fpl); + +#ifdef CONFIG_SECURITY_NETWORK +static __inline__ void unix_get_peersec_dgram(struct socket *sock, struct scm_cookie *scm) +{ + security_socket_getpeersec_dgram(sock, NULL, &scm->secid); +} +#else +static __inline__ void unix_get_peersec_dgram(struct socket *sock, struct scm_cookie *scm) +{ } +#endif /* CONFIG_SECURITY_NETWORK */ + +static __inline__ void scm_set_cred(struct scm_cookie *scm, + struct pid *pid, kuid_t uid, kgid_t gid) +{ + scm->pid = get_pid(pid); + scm->creds.pid = pid_vnr(pid); + scm->creds.uid = uid; + scm->creds.gid = gid; +} + +static __inline__ void scm_destroy_cred(struct scm_cookie *scm) +{ + put_pid(scm->pid); + scm->pid = NULL; +} + +static __inline__ void scm_destroy(struct scm_cookie *scm) +{ + scm_destroy_cred(scm); + if (scm->fp) + __scm_destroy(scm); +} + +static __inline__ int scm_send(struct socket *sock, struct msghdr *msg, + struct scm_cookie *scm, bool forcecreds) +{ + memset(scm, 0, sizeof(*scm)); + scm->creds.uid = INVALID_UID; + scm->creds.gid = INVALID_GID; + if (forcecreds) + scm_set_cred(scm, task_tgid(current), current_uid(), current_gid()); + unix_get_peersec_dgram(sock, scm); + if (msg->msg_controllen <= 0) + return 0; + return __scm_send(sock, msg, scm); +} + +#ifdef CONFIG_SECURITY_NETWORK +static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm) +{ + char *secdata; + u32 seclen; + int err; + + if (test_bit(SOCK_PASSSEC, &sock->flags)) { + err = security_secid_to_secctx(scm->secid, &secdata, &seclen); + + if (!err) { + put_cmsg(msg, SOL_SOCKET, SCM_SECURITY, seclen, secdata); + security_release_secctx(secdata, seclen); + } + } +} +#else +static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm) +{ } +#endif /* CONFIG_SECURITY_NETWORK */ + +static __inline__ void scm_recv(struct socket *sock, struct msghdr *msg, + struct scm_cookie *scm, int flags) +{ + if (!msg->msg_control) { + if (test_bit(SOCK_PASSCRED, &sock->flags) || scm->fp) + msg->msg_flags |= MSG_CTRUNC; + scm_destroy(scm); + return; + } + + if (test_bit(SOCK_PASSCRED, &sock->flags)) { + struct user_namespace *current_ns = current_user_ns(); + struct ucred ucreds = { + .pid = scm->creds.pid, + .uid = from_kuid_munged(current_ns, scm->creds.uid), + .gid = from_kgid_munged(current_ns, scm->creds.gid), + }; + put_cmsg(msg, SOL_SOCKET, SCM_CREDENTIALS, sizeof(ucreds), &ucreds); + } + + scm_destroy_cred(scm); + + scm_passec(sock, msg, scm); + + if (!scm->fp) + return; + + scm_detach_fds(msg, scm); +} + + +#endif /* __LINUX_NET_SCM_H */ + |