bpf: enable bpf syscall on x64 and i386

done as separate commit to ease conflict resolution

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index 028b781..9fe1b5d 100644 (file)
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -363,3 +363,4 @@
 354    i386    seccomp                 sys_seccomp
 355    i386    getrandom               sys_getrandom
 356    i386    memfd_create            sys_memfd_create
+357    i386    bpf                     sys_bpf

diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl
index 35dd922..281150b 100644 (file)
--- a/arch/x86/syscalls/syscall_64.tbl
+++ b/arch/x86/syscalls/syscall_64.tbl
@@ -327,6 +327,7 @@
 318    common  getrandom               sys_getrandom
 319    common  memfd_create            sys_memfd_create
 320    common  kexec_file_load         sys_kexec_file_load
+321    common  bpf                     sys_bpf
 
 #
 # x32-specific system call numbers start at 512 to avoid cache impact

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 0f86d85..bda9b81 100644 (file)
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -65,6 +65,7 @@ struct old_linux_dirent;
 struct perf_event_attr;
 struct file_handle;
 struct sigaltstack;
+union bpf_attr;
 
 #include <linux/types.h>
 #include <linux/aio_abi.h>
@@ -875,5 +876,5 @@ asmlinkage long sys_seccomp(unsigned int op, unsigned int flags,
                            const char __user *uargs);
 asmlinkage long sys_getrandom(char __user *buf, size_t count,
                              unsigned int flags);
-
+asmlinkage long sys_bpf(int cmd, union bpf_attr *attr, unsigned int size);
 #endif

diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 11d11bc..22749c1 100644 (file)
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -705,9 +705,11 @@ __SYSCALL(__NR_seccomp, sys_seccomp)
 __SYSCALL(__NR_getrandom, sys_getrandom)
 #define __NR_memfd_create 279
 __SYSCALL(__NR_memfd_create, sys_memfd_create)
+#define __NR_bpf 280
+__SYSCALL(__NR_bpf, sys_bpf)
 
 #undef __NR_syscalls
-#define __NR_syscalls 280
+#define __NR_syscalls 281
 
 /*
  * All syscalls below here should go away really,

diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 391d4dd..b4b5083 100644 (file)
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -218,3 +218,6 @@ cond_syscall(sys_kcmp);
 
 /* operate on Secure Computing state */
 cond_syscall(sys_seccomp);
+
+/* access BPF programs and maps */
+cond_syscall(sys_bpf);