#include #include "util.h" #include "../perf.h" #include "cloexec.h" #include "asm/bug.h" #include "debug.h" #include #include #include static unsigned long flag = PERF_FLAG_FD_CLOEXEC; int __weak sched_getcpu(void) { #ifdef __NR_getcpu unsigned cpu; int err = syscall(__NR_getcpu, &cpu, NULL, NULL); if (!err) return cpu; #else errno = ENOSYS; #endif return -1; } static int perf_flag_probe(void) { /* use 'safest' configuration as used in perf_evsel__fallback() */ struct perf_event_attr attr = { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_CLOCK, .exclude_kernel = 1, }; int fd; int err; int cpu; pid_t pid = -1; char sbuf[STRERR_BUFSIZE]; cpu = sched_getcpu(); if (cpu < 0) cpu = 0; /* * Using -1 for the pid is a workaround to avoid gratuitous jump label * changes. */ while (1) { /* check cloexec flag */ fd = sys_perf_event_open(&attr, pid, cpu, -1, PERF_FLAG_FD_CLOEXEC); if (fd < 0 && pid == -1 && errno == EACCES) { pid = 0; continue; } break; } err = errno; if (fd >= 0) { close(fd); return 1; } WARN_ONCE(err != EINVAL && err != EBUSY, "perf_event_open(..., PERF_FLAG_FD_CLOEXEC) failed with unexpected error %d (%s)\n", err, str_error_r(err, sbuf, sizeof(sbuf))); /* not supported, confirm error related to PERF_FLAG_FD_CLOEXEC */ while (1) { fd = sys_perf_event_open(&attr, pid, cpu, -1, 0); if (fd < 0 && pid == -1 && errno == EACCES) { pid = 0; continue; } break; } err = errno; if (fd >= 0) close(fd); if (WARN_ONCE(fd < 0 && err != EBUSY, "perf_event_open(..., 0) failed unexpectedly with error %d (%s)\n", err, str_error_r(err, sbuf, sizeof(sbuf)))) return -1; return 0; } unsigned long perf_event_open_cloexec_flag(void) { static bool probed; if (!probed) { if (perf_flag_probe() <= 0) flag = 0; probed = true; } return flag; } inux/net-next.git/diff/net/openvswitch?id=d4aa89cc2bbe021722c946eb11b21ebb0f13c825'>diff
path: root/net/openvswitch
AgeCommit message (Expand)AuthorFilesLines
2017-02-09openvswitch: Pack struct sw_flow_key.Jarno Rajahalme4-34/+39
2017-02-09openvswitch: Add force commit.Jarno Rajahalme1-2/+24
2017-02-09openvswitch: Add original direction conntrack tuple to sw_flow_key.Jarno Rajahalme7-46/+227
2017-02-09openvswitch: Inherit master's labels.Jarno Rajahalme1-14/+31
2017-02-09openvswitch: Refactor labels initialization.Jarno Rajahalme1-42/+62
2017-02-09openvswitch: Simplify labels length logic.Jarno Rajahalme1-11/+9
2017-02-09openvswitch: Unionize ovs_key_ct_label with a u32 array.Jarno Rajahalme1-7/+8
2017-02-09openvswitch: Do not trigger events for unconfirmed connections.Jarno Rajahalme1-6/+22
2017-02-09openvswitch: Use inverted tuple in ovs_ct_find_existing() if NATted.Jarno Rajahalme1-2/+22
2017-02-09openvswitch: Fix comments for skb->_nfctJarno Rajahalme1-7/+7
2017-02-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller1-7/+5
2017-02-02netfilter: add and use nf_ct_set helperFlorian Westphal1-4/+2
2017-02-02skbuff: add and use skb_nfct helperFlorian Westphal1-3/+3