diff options
Diffstat (limited to 'include/linux/lockd')
| -rw-r--r-- | include/linux/lockd/lockd.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index e6b070979287..b56d5aa9b194 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -277,6 +277,47 @@ static inline struct inode *nlmsvc_file_inode(struct nlm_file *file) return file->f_file->f_path.dentry->d_inode; } +static inline int __nlm_privileged_request4(const struct sockaddr *sap) +{ + const struct sockaddr_in *sin = (struct sockaddr_in *)sap; + return (sin->sin_addr.s_addr == htonl(INADDR_LOOPBACK)) && + (ntohs(sin->sin_port) < 1024); +} + +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +static inline int __nlm_privileged_request6(const struct sockaddr *sap) +{ + const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; + return (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LOOPBACK) && + (ntohs(sin6->sin6_port) < 1024); +} +#else /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ +static inline int __nlm_privileged_request6(const struct sockaddr *sap) +{ + return 0; +} +#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ + +/* + * Ensure incoming requests are from local privileged callers. + * + * Return TRUE if sender is local and is connecting via a privileged port; + * otherwise return FALSE. + */ +static inline int nlm_privileged_requester(const struct svc_rqst *rqstp) +{ + const struct sockaddr *sap = svc_addr(rqstp); + + switch (sap->sa_family) { + case AF_INET: + return __nlm_privileged_request4(sap); + case AF_INET6: + return __nlm_privileged_request6(sap); + default: + return 0; + } +} + static inline int __nlm_cmp_addr4(const struct sockaddr *sap1, const struct sockaddr *sap2) { |