/* * common eBPF ELF operations. * * Copyright (C) 2013-2015 Alexei Starovoitov * Copyright (C) 2015 Wang Nan * Copyright (C) 2015 Huawei Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License (not later!) * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program; if not, see */ #include #include #include #include #include #include "bpf.h" /* * When building perf, unistd.h is overrided. __NR_bpf is * required to be defined explicitly. */ #ifndef __NR_bpf # if defined(__i386__) # define __NR_bpf 357 # elif defined(__x86_64__) # define __NR_bpf 321 # elif defined(__aarch64__) # define __NR_bpf 280 # else # error __NR_bpf not defined. libbpf does not support your arch. # endif #endif static __u64 ptr_to_u64(void *ptr) { return (__u64) (unsigned long) ptr; } static int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr, unsigned int size) { return syscall(__NR_bpf, cmd, attr, size); } int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size, int max_entries, __u32 map_flags) { union bpf_attr attr; memset(&attr, '\0', sizeof(attr)); attr.map_type = map_type; attr.key_size = key_size; attr.value_size = value_size; attr.max_entries = max_entries; attr.map_flags = map_flags; return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr)); } int bpf_load_program(enum bpf_prog_type type, struct bpf_insn *insns, size_t insns_cnt, char *license, __u32 kern_version, char *log_buf, size_t log_buf_sz) { int fd; union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.prog_type = type; attr.insn_cnt = (__u32)insns_cnt; attr.insns = ptr_to_u64(insns); attr.license = ptr_to_u64(license); attr.log_buf = ptr_to_u64(NULL); attr.log_size = 0; attr.log_level = 0; attr.kern_version = kern_version; fd = sys_bpf(BPF_PROG_LOAD, &attr, sizeof(attr)); if (fd >= 0 || !log_buf || !log_buf_sz) return fd; /* Try again with log */ attr.log_buf = ptr_to_u64(log_buf); attr.log_size = log_buf_sz; attr.log_level = 1; log_buf[0] = 0; return sys_bpf(BPF_PROG_LOAD, &attr, sizeof(attr)); } int bpf_map_update_elem(int fd, void *key, void *value, __u64 flags) { union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); attr.value = ptr_to_u64(value); attr.flags = flags; return sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); } int bpf_map_lookup_elem(int fd, void *key, void *value) { union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); attr.value = ptr_to_u64(value); return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); } int bpf_map_delete_elem(int fd, void *key) { union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); return sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr)); } int bpf_map_get_next_key(int fd, void *key, void *next_key) { union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.map_fd = fd; attr.key = ptr_to_u64(key); attr.next_key = ptr_to_u64(next_key); return sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr)); } int bpf_obj_pin(int fd, const char *pathname) { union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.pathname = ptr_to_u64((void *)pathname); attr.bpf_fd = fd; return sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr)); } int bpf_obj_get(const char *pathname) { union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.pathname = ptr_to_u64((void *)pathname); return sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr)); } int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type) { union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.target_fd = target_fd; attr.attach_bpf_fd = prog_fd; attr.attach_type = type; return sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr)); } int bpf_prog_detach(int target_fd, enum bpf_attach_type type) { union bpf_attr attr; bzero(&attr, sizeof(attr)); attr.target_fd = target_fd; attr.attach_type = type; return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr)); } r>mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-28 11:00:08 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-28 11:00:08 -0800
commitef1dce990b06a3f5bf4f71100891686b5d3f7c7e (patch)
tree22d25cfec318d544a10f1a64738e40e2792ff836 /drivers/usb/gadget/legacy/tcm_usb_gadget.c
parent1b1bc42c1692e9b62756323c675a44cb1a1f9dbd (diff)
parent9aed02feae57bf7a40cb04ea0e3017cb7a998db4 (diff)
Merge tag 'arc-4.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta: "Hopefully last set of changes for ARC for 4.10: - fix for unaligned access emulation corner case - fix for udelay loop inline asm regression - fix irq affinity finally for AXS103 board [Yuriy] - final fixes for setting IO-coherency sanely in SMP" * tag 'arc-4.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: [arcompact] handle unaligned access delay slot corner case ARCv2: smp-boot: wake_flag polling by non-Masters needs to be uncached ARC: smp-boot: Decouple Non masters waiting API from jump to entry point ARCv2: MCIP: update the BCR per current changes ARC: udelay: fix inline assembler by adding LP_COUNT to clobber list ARCv2: MCIP: Deprecate setting of affinity in Device Tree
Diffstat (limited to 'drivers/usb/gadget/legacy/tcm_usb_gadget.c')