diff options
Diffstat (limited to 'include/linux/socket.h')
| -rw-r--r-- | include/linux/socket.h | 229 |
1 files changed, 188 insertions, 41 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index 230c04bda3e2..ec715ad4bf25 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_SOCKET_H #define _LINUX_SOCKET_H @@ -9,8 +10,13 @@ #include <linux/compiler.h> /* __user */ #include <uapi/linux/socket.h> +struct file; struct pid; struct cred; +struct socket; +struct sock; +struct sk_buff; +struct proto_accept_arg; #define __sockaddr_check_size(size) \ BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage))) @@ -25,12 +31,30 @@ typedef __kernel_sa_family_t sa_family_t; /* * 1003.1g requires sa_family_t and that sa_data is char. */ - + +/* Deprecated for in-kernel use. Use struct sockaddr_unsized instead. */ struct sockaddr { sa_family_t sa_family; /* address family, AF_xxx */ char sa_data[14]; /* 14 bytes of protocol address */ }; +/** + * struct sockaddr_unsized - Unspecified size sockaddr for callbacks + * @sa_family: Address family (AF_UNIX, AF_INET, AF_INET6, etc.) + * @sa_data: Flexible array for address data + * + * This structure is designed for callback interfaces where the + * total size is known via the sockaddr_len parameter. Unlike struct + * sockaddr which has a fixed 14-byte sa_data limit or struct + * sockaddr_storage which has a fixed 128-byte sa_data limit, this + * structure can accommodate addresses of any size, but must be used + * carefully. + */ +struct sockaddr_unsized { + __kernel_sa_family_t sa_family; /* address family, AF_xxx */ + char sa_data[]; /* flexible address data */ +}; + struct linger { int l_onoff; /* Linger active */ int l_linger; /* How long to linger for */ @@ -43,26 +67,53 @@ struct linger { * system, not 4.3. Thus msg_accrights(len) are now missing. They * belong in an obscure libc emulation or the bin. */ - + struct msghdr { - void * msg_name; /* Socket name */ - int msg_namelen; /* Length of name */ - struct iovec * msg_iov; /* Data blocks */ - __kernel_size_t msg_iovlen; /* Number of blocks */ - void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */ - __kernel_size_t msg_controllen; /* Length of cmsg list */ - unsigned int msg_flags; + void *msg_name; /* ptr to socket address structure */ + int msg_namelen; /* size of socket address structure */ + + int msg_inq; /* output, data left in socket */ + + struct iov_iter msg_iter; /* data */ + + /* + * Ancillary data. msg_control_user is the user buffer used for the + * recv* side when msg_control_is_user is set, msg_control is the kernel + * buffer used for all other cases. + */ + union { + void *msg_control; + void __user *msg_control_user; + }; + bool msg_control_is_user : 1; + bool msg_get_inq : 1;/* return INQ after receive */ + unsigned int msg_flags; /* flags on received message */ + __kernel_size_t msg_controllen; /* ancillary data buffer length */ + struct kiocb *msg_iocb; /* ptr to iocb for async requests */ + struct ubuf_info *msg_ubuf; + int (*sg_from_iter)(struct sk_buff *skb, + struct iov_iter *from, size_t length); +}; + +struct user_msghdr { + void __user *msg_name; /* ptr to socket address structure */ + int msg_namelen; /* size of socket address structure */ + struct iovec __user *msg_iov; /* scatter/gather array */ + __kernel_size_t msg_iovlen; /* # elements in msg_iov */ + void __user *msg_control; /* ancillary data */ + __kernel_size_t msg_controllen; /* ancillary data buffer length */ + unsigned int msg_flags; /* flags on received message */ }; /* For recvmmsg/sendmmsg */ struct mmsghdr { - struct msghdr msg_hdr; + struct user_msghdr msg_hdr; unsigned int msg_len; }; /* * POSIX 1003.1g - ancillary data object information - * Ancillary data consits of a sequence of pairs of + * Ancillary data consists of a sequence of pairs of * (cmsghdr, cmsg_data[]) */ @@ -82,9 +133,12 @@ struct cmsghdr { #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) ) -#define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr)))) -#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len)) -#define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len)) +#define CMSG_DATA(cmsg) \ + ((void *)(cmsg) + sizeof(struct cmsghdr)) +#define CMSG_USER_DATA(cmsg) \ + ((void __user *)(cmsg) + sizeof(struct cmsghdr)) +#define CMSG_SPACE(len) (sizeof(struct cmsghdr) + CMSG_ALIGN(len)) +#define CMSG_LEN(len) (sizeof(struct cmsghdr) + (len)) #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \ (struct cmsghdr *)(ctl) : \ @@ -94,6 +148,10 @@ struct cmsghdr { (cmsg)->cmsg_len <= (unsigned long) \ ((mhdr)->msg_controllen - \ ((char *)(cmsg) - (char *)(mhdr)->msg_control))) +#define for_each_cmsghdr(cmsg, msg) \ + for (cmsg = CMSG_FIRSTHDR(msg); \ + cmsg; \ + cmsg = CMSG_NXTHDR(msg, cmsg)) /* * Get the next cmsg header @@ -107,7 +165,7 @@ struct cmsghdr { * inside range, given by msg->msg_controllen before using * ancillary object DATA. --ANK (980731) */ - + static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size, struct cmsghdr *__cmsg) { @@ -125,11 +183,17 @@ static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg); } +static inline size_t msg_data_left(const struct msghdr *msg) +{ + return iov_iter_count(&msg->msg_iter); +} + /* "Socket"-level control message types: */ #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */ #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */ #define SCM_SECURITY 0x03 /* rw: security label */ +#define SCM_PIDFD 0x04 /* ro: pidfd (int) */ struct ucred { __u32 pid; @@ -168,6 +232,7 @@ struct ucred { #define AF_WANPIPE 25 /* Wanpipe API Sockets */ #define AF_LLC 26 /* Linux LLC */ #define AF_IB 27 /* Native InfiniBand address */ +#define AF_MPLS 28 /* MPLS */ #define AF_CAN 29 /* Controller Area Network */ #define AF_TIPC 30 /* TIPC sockets */ #define AF_BLUETOOTH 31 /* Bluetooth sockets */ @@ -180,7 +245,18 @@ struct ucred { #define AF_ALG 38 /* Algorithm sockets */ #define AF_NFC 39 /* NFC sockets */ #define AF_VSOCK 40 /* vSockets */ -#define AF_MAX 41 /* For now.. */ +#define AF_KCM 41 /* Kernel Connection Multiplexor*/ +#define AF_QIPCRTR 42 /* Qualcomm IPC Router */ +#define AF_SMC 43 /* smc sockets: reserve number for + * PF_SMC protocol family that + * reuses AF_INET address family + */ +#define AF_XDP 44 /* XDP sockets */ +#define AF_MCTP 45 /* Management component + * transport protocol + */ + +#define AF_MAX 46 /* For now.. */ /* Protocol families, same as address families. */ #define PF_UNSPEC AF_UNSPEC @@ -213,6 +289,7 @@ struct ucred { #define PF_WANPIPE AF_WANPIPE #define PF_LLC AF_LLC #define PF_IB AF_IB +#define PF_MPLS AF_MPLS #define PF_CAN AF_CAN #define PF_TIPC AF_TIPC #define PF_BLUETOOTH AF_BLUETOOTH @@ -225,15 +302,20 @@ struct ucred { #define PF_ALG AF_ALG #define PF_NFC AF_NFC #define PF_VSOCK AF_VSOCK +#define PF_KCM AF_KCM +#define PF_QIPCRTR AF_QIPCRTR +#define PF_SMC AF_SMC +#define PF_XDP AF_XDP +#define PF_MCTP AF_MCTP #define PF_MAX AF_MAX /* Maximum queue length specifiable by listen. */ -#define SOMAXCONN 128 +#define SOMAXCONN 4096 -/* Flags we can use with send/ and recv. +/* Flags we can use with send/ and recv. Added those for 1003.1g not all are supported yet */ - + #define MSG_OOB 1 #define MSG_PEEK 2 #define MSG_DONTROUTE 4 @@ -252,11 +334,19 @@ struct ucred { #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */ #define MSG_MORE 0x8000 /* Sender will send more */ #define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */ -#define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */ +#define MSG_SENDPAGE_NOPOLICY 0x10000 /* sendpage() internal : do no apply policy */ +#define MSG_BATCH 0x40000 /* sendmmsg(): more messages coming */ #define MSG_EOF MSG_FIN - +#define MSG_NO_SHARED_FRAGS 0x80000 /* sendpage() internal : page frags are not shared */ +#define MSG_SENDPAGE_DECRYPTED 0x100000 /* sendpage() internal : page may carry + * plain text and require encryption + */ + +#define MSG_SOCK_DEVMEM 0x2000000 /* Receive devmem skbs as cmsg */ +#define MSG_ZEROCOPY 0x4000000 /* Use user data in kernel path */ +#define MSG_SPLICE_PAGES 0x8000000 /* Splice the pages from the iterator in sendmsg() */ #define MSG_FASTOPEN 0x20000000 /* Send data in TCP SYN */ -#define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exit for file +#define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exec for file descriptor received through SCM_RIGHTS */ #if defined(CONFIG_COMPAT) @@ -265,6 +355,9 @@ struct ucred { #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */ #endif +/* Flags to be cleared on entry by sendmsg and sendmmsg syscalls */ +#define MSG_INTERNAL_SENDMSG_FLAGS \ + (MSG_SPLICE_PAGES | MSG_SENDPAGE_NOPOLICY | MSG_SENDPAGE_DECRYPTED) /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */ #define SOL_IP 0 @@ -301,32 +394,86 @@ struct ucred { #define SOL_CAIF 278 #define SOL_ALG 279 #define SOL_NFC 280 +#define SOL_KCM 281 +#define SOL_TLS 282 +#define SOL_XDP 283 +#define SOL_MPTCP 284 +#define SOL_MCTP 285 +#define SOL_SMC 286 +#define SOL_VSOCK 287 /* IPX options */ #define IPX_TYPE 1 -extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred); - -extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov, - int offset, int len); -extern int csum_partial_copy_fromiovecend(unsigned char *kdata, - struct iovec *iov, - int offset, - unsigned int len, __wsum *csump); - -extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode); -extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata, - int offset, int len); extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr); extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); +extern int put_cmsg_notrunc(struct msghdr *msg, int level, int type, int len, + void *data); + +struct timespec64; +struct __kernel_timespec; +struct old_timespec32; -struct timespec; +struct scm_timestamping_internal { + struct timespec64 ts[3]; +}; -/* The __sys_...msg variants allow MSG_CMSG_COMPAT */ -extern long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags); -extern long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags); -extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, - unsigned int flags, struct timespec *timeout); +extern void put_cmsg_scm_timestamping64(struct msghdr *msg, struct scm_timestamping_internal *tss); +extern void put_cmsg_scm_timestamping(struct msghdr *msg, struct scm_timestamping_internal *tss); + +/* The __sys_...msg variants allow MSG_CMSG_COMPAT iff + * forbid_cmsg_compat==false + */ +extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, + unsigned int flags, bool forbid_cmsg_compat); +extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, + unsigned int flags, bool forbid_cmsg_compat); +extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, + unsigned int vlen, unsigned int flags, + struct __kernel_timespec __user *timeout, + struct old_timespec32 __user *timeout32); extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, - unsigned int vlen, unsigned int flags); + unsigned int vlen, unsigned int flags, + bool forbid_cmsg_compat); +extern long __sys_sendmsg_sock(struct socket *sock, struct msghdr *msg, + unsigned int flags); +extern long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg, + struct user_msghdr __user *umsg, + struct sockaddr __user *uaddr, + unsigned int flags); +extern int __copy_msghdr(struct msghdr *kmsg, + struct user_msghdr *umsg, + struct sockaddr __user **save_addr); + +/* helpers which do the actual work for syscalls */ +extern int __sys_recvfrom(int fd, void __user *ubuf, size_t size, + unsigned int flags, struct sockaddr __user *addr, + int __user *addr_len); +extern int __sys_sendto(int fd, void __user *buff, size_t len, + unsigned int flags, struct sockaddr __user *addr, + int addr_len); +extern struct file *do_accept(struct file *file, struct proto_accept_arg *arg, + struct sockaddr __user *upeer_sockaddr, + int __user *upeer_addrlen, int flags); +extern int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, + int __user *upeer_addrlen, int flags); +extern int __sys_socket(int family, int type, int protocol); +extern struct file *__sys_socket_file(int family, int type, int protocol); +extern int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen); +extern int __sys_bind_socket(struct socket *sock, struct sockaddr_storage *address, + int addrlen); +extern int __sys_connect_file(struct file *file, struct sockaddr_storage *addr, + int addrlen, int file_flags); +extern int __sys_connect(int fd, struct sockaddr __user *uservaddr, + int addrlen); +extern int __sys_listen(int fd, int backlog); +extern int __sys_listen_socket(struct socket *sock, int backlog); +extern int do_getsockname(struct socket *sock, int peer, + struct sockaddr __user *usockaddr, int __user *usockaddr_len); +extern int __sys_getsockname(int fd, struct sockaddr __user *usockaddr, + int __user *usockaddr_len, int peer); +extern int __sys_socketpair(int family, int type, int protocol, + int __user *usockvec); +extern int __sys_shutdown_sock(struct socket *sock, int how); +extern int __sys_shutdown(int fd, int how); #endif /* _LINUX_SOCKET_H */ |