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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/ip_fw.h | |
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/ip_fw.h')
-rw-r--r-- | sys/netinet/ip_fw.h | 91 |
1 files changed, 9 insertions, 82 deletions
diff --git a/sys/netinet/ip_fw.h b/sys/netinet/ip_fw.h index 9e3468f..609ac4c 100644 --- a/sys/netinet/ip_fw.h +++ b/sys/netinet/ip_fw.h @@ -651,12 +651,14 @@ void ipfw_destroy(void); void ipfw_nat_destroy(void); #endif -#ifdef VIMAGE_GLOBALS -extern int fw_one_pass; -extern int fw_enable; +VNET_DECLARE(int, fw_one_pass); +VNET_DECLARE(int, fw_enable); +#define V_fw_one_pass VNET_GET(fw_one_pass) +#define V_fw_enable VNET_GET(fw_enable) + #ifdef INET6 -extern int fw6_enable; -#endif +VNET_DECLARE(int, fw6_enable); +#define V_fw6_enable VNET_GET(fw6_enable) #endif struct ip_fw_chain { @@ -692,83 +694,8 @@ typedef int ipfw_nat_t(struct ip_fw_args *, struct cfg_nat *, struct mbuf *); typedef int ipfw_nat_cfg_t(struct sockopt *); #endif -struct eventhandler_entry; -/* - * Stack virtualization support. - */ -struct vnet_ipfw { - int _fw_enable; - int _fw6_enable; - u_int32_t _set_disable; - int _fw_deny_unknown_exthdrs; - int _fw_verbose; - int _verbose_limit; - int _autoinc_step; - ipfw_dyn_rule ** _ipfw_dyn_v; - uma_zone_t _ipfw_dyn_rule_zone; - struct ip_fw_chain _layer3_chain; - u_int32_t _dyn_buckets; - u_int32_t _curr_dyn_buckets; - u_int32_t _dyn_ack_lifetime; - u_int32_t _dyn_syn_lifetime; - u_int32_t _dyn_fin_lifetime; - u_int32_t _dyn_rst_lifetime; - u_int32_t _dyn_udp_lifetime; - u_int32_t _dyn_short_lifetime; - u_int32_t _dyn_keepalive_interval; - u_int32_t _dyn_keepalive_period; - u_int32_t _dyn_keepalive; - u_int32_t _static_count; - u_int32_t _static_len; - u_int32_t _dyn_count; - u_int32_t _dyn_max; - u_int64_t _norule_counter; - struct callout _ipfw_timeout; - struct eventhandler_entry *_ifaddr_event_tag; -}; - -#ifndef VIMAGE -#ifndef VIMAGE_GLOBALS -extern struct vnet_ipfw vnet_ipfw_0; -#endif -#endif - -/* - * Symbol translation macros - */ -#define INIT_VNET_IPFW(vnet) \ - INIT_FROM_VNET(vnet, VNET_MOD_IPFW, struct vnet_ipfw, vnet_ipfw) - -#define VNET_IPFW(sym) VSYM(vnet_ipfw, sym) - -#define V_fw_enable VNET_IPFW(fw_enable) -#define V_fw6_enable VNET_IPFW(fw6_enable) -#define V_set_disable VNET_IPFW(set_disable) -#define V_fw_deny_unknown_exthdrs VNET_IPFW(fw_deny_unknown_exthdrs) -#define V_fw_verbose VNET_IPFW(fw_verbose) -#define V_verbose_limit VNET_IPFW(verbose_limit) -#define V_autoinc_step VNET_IPFW(autoinc_step) -#define V_ipfw_dyn_v VNET_IPFW(ipfw_dyn_v) -#define V_ipfw_dyn_rule_zone VNET_IPFW(ipfw_dyn_rule_zone) -#define V_layer3_chain VNET_IPFW(layer3_chain) -#define V_dyn_buckets VNET_IPFW(dyn_buckets) -#define V_curr_dyn_buckets VNET_IPFW(curr_dyn_buckets) -#define V_dyn_ack_lifetime VNET_IPFW(dyn_ack_lifetime) -#define V_dyn_syn_lifetime VNET_IPFW(dyn_syn_lifetime) -#define V_dyn_fin_lifetime VNET_IPFW(dyn_fin_lifetime) -#define V_dyn_rst_lifetime VNET_IPFW(dyn_rst_lifetime) -#define V_dyn_udp_lifetime VNET_IPFW(dyn_udp_lifetime) -#define V_dyn_short_lifetime VNET_IPFW(dyn_short_lifetime) -#define V_dyn_keepalive_interval VNET_IPFW(dyn_keepalive_interval) -#define V_dyn_keepalive_period VNET_IPFW(dyn_keepalive_period) -#define V_dyn_keepalive VNET_IPFW(dyn_keepalive) -#define V_static_count VNET_IPFW(static_count) -#define V_static_len VNET_IPFW(static_len) -#define V_dyn_count VNET_IPFW(dyn_count) -#define V_dyn_max VNET_IPFW(dyn_max) -#define V_norule_counter VNET_IPFW(norule_counter) -#define V_ipfw_timeout VNET_IPFW(ipfw_timeout) -#define V_ifaddr_event_tag VNET_IPFW(ifaddr_event_tag) +VNET_DECLARE(struct ip_fw_chain, layer3_chain); +#define V_layer3_chain VNET_GET(layer3_chain) #endif /* _KERNEL */ #endif /* _IPFW2_H */ |