/* eBPF example program: * * - Loads eBPF program * * The eBPF program loads a filter from file and attaches the * program to a cgroup using BPF_PROG_ATTACH */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include "libbpf.h" #include "bpf_load.h" static int usage(const char *argv0) { printf("Usage: %s cg-path filter-path [filter-id]\n", argv0); return EXIT_FAILURE; } int main(int argc, char **argv) { int cg_fd, ret, filter_id = 0; if (argc < 3) return usage(argv[0]); cg_fd = open(argv[1], O_DIRECTORY | O_RDONLY); if (cg_fd < 0) { printf("Failed to open cgroup path: '%s'\n", strerror(errno)); return EXIT_FAILURE; } if (load_bpf_file(argv[2])) return EXIT_FAILURE; printf("Output from kernel verifier:\n%s\n-------\n", bpf_log_buf); if (argc > 3) filter_id = atoi(argv[3]); if (filter_id > prog_cnt) { printf("Invalid program id; program not found in file\n"); return EXIT_FAILURE; } ret = bpf_prog_attach(prog_fd[filter_id], cg_fd, BPF_CGROUP_INET_SOCK_CREATE); if (ret < 0) { printf("Failed to attach prog to cgroup: '%s'\n", strerror(errno)); return EXIT_FAILURE; } return EXIT_SUCCESS; } lect> net-next plumbingsTobias Klauser
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authorJisheng Zhang <jszhang@marvell.com>2016-11-10 17:21:29 +0800
committerMark Brown <broonie@kernel.org>2016-11-11 15:38:08 +0000
commit09f2ba0b0b7c44ecea49cf69a708203b76ba5535 (patch)
tree042df33ac99f77d8b86ac427431e267c33561c35 /net/core/devlink.c
parent1001354ca34179f3db924eb66672442a173147dc (diff)
regulator: gpio: properly check return value of of_get_named_gpio
The function of_get_named_gpio() could return -ENOENT, -EPROBE_DEFER -EINVAL and so on. Currently, for the optional property "enable-gpio", we only check -EPROBE_DEFER, this is not enough since there may be misconfigured "enable-gpio" in the DTB, of_get_named_gpio() will return -EINVAL in this case, we should return immediately here. And for the optional property "gpios", we didn't check the return value, the driver will continue to the point where gpio_request_array() is called, it doesn't make sense to continue if we got -EPROBE_DEFER or -EINVAL here. This patch tries to address these two issues by properly checking the return value of of_get_named_gpio. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'net/core/devlink.c')