diff options
author | rwatson <rwatson@FreeBSD.org> | 2009-07-14 22:48:30 +0000 |
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committer | rwatson <rwatson@FreeBSD.org> | 2009-07-14 22:48:30 +0000 |
commit | 57ca4583e728cab422fba8f15de10bd0b637b3dd (patch) | |
tree | 13848f891fb2f7a396281b31633563d0f764ff65 /sys/netinet/tcp_usrreq.c | |
parent | ef443476d9706035ac219f0280ef0b817dda7a6d (diff) | |
download | FreeBSD-src-57ca4583e728cab422fba8f15de10bd0b637b3dd.zip FreeBSD-src-57ca4583e728cab422fba8f15de10bd0b637b3dd.tar.gz |
Build on Jeff Roberson's linker-set based dynamic per-CPU allocator
(DPCPU), as suggested by Peter Wemm, and implement a new per-virtual
network stack memory allocator. Modify vnet to use the allocator
instead of monolithic global container structures (vinet, ...). This
change solves many binary compatibility problems associated with
VIMAGE, and restores ELF symbols for virtualized global variables.
Each virtualized global variable exists as a "reference copy", and also
once per virtual network stack. Virtualized global variables are
tagged at compile-time, placing the in a special linker set, which is
loaded into a contiguous region of kernel memory. Virtualized global
variables in the base kernel are linked as normal, but those in modules
are copied and relocated to a reserved portion of the kernel's vnet
region with the help of a the kernel linker.
Virtualized global variables exist in per-vnet memory set up when the
network stack instance is created, and are initialized statically from
the reference copy. Run-time access occurs via an accessor macro, which
converts from the current vnet and requested symbol to a per-vnet
address. When "options VIMAGE" is not compiled into the kernel, normal
global ELF symbols will be used instead and indirection is avoided.
This change restores static initialization for network stack global
variables, restores support for non-global symbols and types, eliminates
the need for many subsystem constructors, eliminates large per-subsystem
structures that caused many binary compatibility issues both for
monitoring applications (netstat) and kernel modules, removes the
per-function INIT_VNET_*() macros throughout the stack, eliminates the
need for vnet_symmap ksym(2) munging, and eliminates duplicate
definitions of virtualized globals under VIMAGE_GLOBALS.
Bump __FreeBSD_version and update UPDATING.
Portions submitted by: bz
Reviewed by: bz, zec
Discussed with: gnn, jamie, jeff, jhb, julian, sam
Suggested by: peter
Approved by: re (kensmith)
Diffstat (limited to 'sys/netinet/tcp_usrreq.c')
-rw-r--r-- | sys/netinet/tcp_usrreq.c | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c index 5fc2837..dfd05dc 100644 --- a/sys/netinet/tcp_usrreq.c +++ b/sys/netinet/tcp_usrreq.c @@ -87,7 +87,6 @@ __FBSDID("$FreeBSD$"); #include <netinet/tcp_debug.h> #endif #include <netinet/tcp_offload.h> -#include <netinet/vinet.h> /* * TCP protocol interface to socket abstraction. @@ -157,9 +156,6 @@ static void tcp_detach(struct socket *so, struct inpcb *inp) { struct tcpcb *tp; -#ifdef INVARIANTS - INIT_VNET_INET(so->so_vnet); -#endif INP_INFO_WLOCK_ASSERT(&V_tcbinfo); INP_WLOCK_ASSERT(inp); @@ -221,7 +217,6 @@ tcp_detach(struct socket *so, struct inpcb *inp) static void tcp_usr_detach(struct socket *so) { - INIT_VNET_INET(so->so_vnet); struct inpcb *inp; inp = sotoinpcb(so); @@ -240,7 +235,6 @@ tcp_usr_detach(struct socket *so) static int tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp; struct tcpcb *tp = NULL; @@ -281,7 +275,6 @@ out: static int tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp; struct tcpcb *tp = NULL; @@ -340,7 +333,6 @@ out: static int tcp_usr_listen(struct socket *so, int backlog, struct thread *td) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp; struct tcpcb *tp = NULL; @@ -378,7 +370,6 @@ out: static int tcp6_usr_listen(struct socket *so, int backlog, struct thread *td) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp; struct tcpcb *tp = NULL; @@ -426,7 +417,6 @@ out: static int tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp; struct tcpcb *tp = NULL; @@ -469,7 +459,6 @@ out: static int tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp; struct tcpcb *tp = NULL; @@ -547,7 +536,6 @@ out: static int tcp_usr_disconnect(struct socket *so) { - INIT_VNET_INET(so->so_vnet); struct inpcb *inp; struct tcpcb *tp = NULL; int error = 0; @@ -579,7 +567,6 @@ out: static int tcp_usr_accept(struct socket *so, struct sockaddr **nam) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp = NULL; struct tcpcb *tp = NULL; @@ -677,7 +664,6 @@ out: static int tcp_usr_shutdown(struct socket *so) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp; struct tcpcb *tp = NULL; @@ -745,7 +731,6 @@ static int tcp_usr_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, struct mbuf *control, struct thread *td) { - INIT_VNET_INET(so->so_vnet); int error = 0; struct inpcb *inp; struct tcpcb *tp = NULL; @@ -901,7 +886,6 @@ out: static void tcp_usr_abort(struct socket *so) { - INIT_VNET_INET(so->so_vnet); struct inpcb *inp; struct tcpcb *tp = NULL; TCPDEBUG0; @@ -940,7 +924,6 @@ tcp_usr_abort(struct socket *so) static void tcp_usr_close(struct socket *so) { - INIT_VNET_INET(so->so_vnet); struct inpcb *inp; struct tcpcb *tp = NULL; TCPDEBUG0; @@ -1079,7 +1062,6 @@ tcp_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) { struct inpcb *inp = tp->t_inpcb, *oinp; struct socket *so = inp->inp_socket; - INIT_VNET_INET(so->so_vnet); struct in_addr laddr; u_short lport; int error; @@ -1135,7 +1117,6 @@ tcp6_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) { struct inpcb *inp = tp->t_inpcb, *oinp; struct socket *so = inp->inp_socket; - INIT_VNET_INET(so->so_vnet); struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; struct in6_addr addr6; int error; @@ -1257,7 +1238,6 @@ tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti) int tcp_ctloutput(struct socket *so, struct sockopt *sopt) { - INIT_VNET_INET(so->so_vnet); int error, opt, optval; struct inpcb *inp; struct tcpcb *tp; @@ -1445,7 +1425,6 @@ SYSCTL_ULONG(_net_inet_tcp, TCPCTL_RECVSPACE, recvspace, CTLFLAG_RW, static int tcp_attach(struct socket *so) { - INIT_VNET_INET(so->so_vnet); struct tcpcb *tp; struct inpcb *inp; int error; @@ -1498,9 +1477,6 @@ tcp_disconnect(struct tcpcb *tp) { struct inpcb *inp = tp->t_inpcb; struct socket *so = inp->inp_socket; -#ifdef INVARIANTS - INIT_VNET_INET(so->so_vnet); -#endif INP_INFO_WLOCK_ASSERT(&V_tcbinfo); INP_WLOCK_ASSERT(inp); @@ -1539,9 +1515,6 @@ tcp_disconnect(struct tcpcb *tp) static void tcp_usrclosed(struct tcpcb *tp) { -#ifdef INVARIANTS - INIT_VNET_INET(tp->t_inpcb->inp_vnet); -#endif INP_INFO_WLOCK_ASSERT(&V_tcbinfo); INP_WLOCK_ASSERT(tp->t_inpcb); |