#include <sched.h>
#include "util.h"
#include "../perf.h"
#include "cloexec.h"
#include "asm/bug.h"
#include "debug.h"
#include <unistd.h>
#include <asm/unistd.h>
#include <sys/syscall.h>
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;
}
0160ee9938'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=c6d30e8391b85e00eb544e6cf047ee0160ee9938'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?id=c6d30e8391b85e00eb544e6cf047ee0160ee9938'>net</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net?id=c6d30e8391b85e00eb544e6cf047ee0160ee9938&showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-02-07 13:07:47 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=51ce8bd4d17a761e1a90a34a1b5c9b762cce7553'>net: pending_confirm is not used anymore</a></td><td>Julian Anastasov</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2017-02-07 13:07:47 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=0dec879f636f11b0ffda1cb5fd96a1754c59ead3'>net: use dst_confirm_neigh for UDP, RAW, ICMP, L2TP</a></td><td>Julian Anastasov</td><td>9</td><td><span class='deletions'>-19</span>/<span class='insertions'>+44</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=63fca65d08632fbec9d9b655f671cf08aa1aeeb8'>net: add confirm_neigh method to dst_ops</a></td><td>Julian Anastasov</td><td>3</td><td><span class='deletions'>-0</span>/<span class='insertions'>+54</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=c3a2e8370534f810cac6050169db0ed3e0f94f0b'>tcp: replace dst_confirm with sk_dst_confirm</a></td><td>Julian Anastasov</td><td>3</td><td><span class='deletions'>-14</span>/<span class='insertions'>+7</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>sctp: add dst_pending_confirm flag</a></td><td>Julian Anastasov</td><td>7</td><td><span class='deletions'>-12</span>/<span class='insertions'>+31</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=4ff0620354f2b39b9fe2a91c22c4de9d1fba0c8e'>net: add dst_pending_confirm flag to skbuff</a></td><td>Julian Anastasov</td><td>2</td><td><span class='deletions'>-1</span>/<span class='insertions'>+5</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=9b8805a325591cf5b6b9df71200de25a2bd721fd'>sock: add sk_dst_pending_confirm flag</a></td><td>Julian Anastasov</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2017-02-07 11:42:35 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=bb4005bae3dab0dd21b239b1da193053151c07ba'>ipv6: sr: fix non static symbol warnings</a></td><td>Wei Yongjun</td><td>1</td><td><span class='deletions'>-4</span>/<span class='insertions'>+4</span></td></tr>
<tr><td><span title='2017-02-07 11:42:34 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=89d82452d1fd283bb1e313bc7a1f7c324362cf02'>net/sched: act_mirred: remove duplicated include from act_mirred.c</a></td><td>Wei Yongjun</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2017-02-07 10:51:45 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=71e0bbde0d88047f66b25721f69a441d46083748'>net: dsa: Add support for platform data</a></td><td>Florian Fainelli</td><td>1</td><td><span class='deletions'>-18</span>/<span class='insertions'>+84</span></td></tr>
<tr><td><span title='2017-02-07 10:51:45 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=14b89f36eed2993670906a3991bca496a5ebf1a6'>net: dsa: Rename and export dev_to_net_device()</a></td><td>Florian Fainelli</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2017-02-06 22:53:13 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=83a718d6294964fd1b227fa5f1ad001bc1fe7656'>bridge: fdb: write to used and updated at most once per jiffy</a></td><td>Nikolay Aleksandrov</td><td>2</td><td><span class='deletions'>-2</span>/<span class='insertions'>+4</span></td></tr>
<tr><td><span title='2017-02-06 22:53:13 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=1214628cb1868254e107230c9052f28ff9899b6a'>bridge: move write-heavy fdb members in their own cache line</a></td><td>Nikolay Aleksandrov</td><td>1</td><td><span class='deletions'>-4</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-06 22:53:13 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=f7cdee8a79a1cb03fa9ca71b825e72f880b344e1'>bridge: move to workqueue gc</a></td><td>Nikolay Aleksandrov</td><td>10</td><td><span class='deletions'>-23</span>/<span class='insertions'>+29</span></td></tr>
<tr><td><span title='2017-02-06 22:53:13 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=1f90c7f3470580e24da25f6a6c1fb480ed9371ac'>bridge: modify bridge and port to have often accessed fields in one cache line</a></td><td>Nikolay Aleksandrov</td><td>1</td><td><span class='deletions'>-23</span>/<span class='insertions'>+20</span></td></tr>
<tr><td><span title='2017-02-06 16:53:29 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=04d3a4c6af52a58370795bc9f70dc15f51f8bb84'>net: dsa: introduce bridge notifier</a></td><td>Vivien Didelot</td><td>2</td><td><span class='deletions'>-11</span>/<span class='insertions'>+61</span></td></tr>
<tr><td><span title='2017-02-06 16:53:29 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=f515f192ab4f45bb695146b82432d63d98775787'>net: dsa: add switch notifier</a></td><td>Vivien Didelot</td><td>5</td><td><span class='deletions'>-0</span>/<span class='insertions'>+70</span></td></tr>
<tr><td><span title='2017-02-06 16:53:29 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=c5d35cb32cffa6e4c2db1cbd9a544e10a8d6fda9'>net: dsa: change state setter scope</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-6</span>/<span class='insertions'>+9</span></td></tr>
<tr><td><span title='2017-02-06 16:53:28 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=9c26542685130ef3b55cdb4e04eec0ac33376b41'>net: dsa: rollback bridging on error</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+13</span></td></tr>
<tr><td><span title='2017-02-06 16:53:28 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=8e92ab3a426e04dc355b196e3b4474f633025a3b'>net: dsa: simplify netdevice events handling</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-28</span>/<span class='insertions'>+16</span></td></tr>
<tr><td><span title='2017-02-06 16:53:28 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=88e4f0ca4e4e7760e4aad544789c5408219886d5'>net: dsa: move netdevice notifier registration</a></td><td>Vivien Didelot</td><td>3</td><td><span class='deletions'>-10</span>/<span class='insertions'>+26</span></td></tr>
<tr><td><span title='2017-02-06 16:33:29 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=d0d7b10b05945f40fefd4e60f457c61aefa3e9a9'>net-next: treewide use is_vlan_dev() helper function.</a></td><td>Parav Pandit</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2017-02-06 11:57:15 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=d15c9ede6123dbce14c17eb9ced229e488002735'>sctp: process fwd tsn chunk only when prsctp is enabled</a></td><td>Xin Long</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-06 11:25:57 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=a8eca326151ee1beac82a4fd86d9edad3a37aaed'>net: remove ndo_neigh_{construct, destroy} from stacked devices</a></td><td>Ido Schimmel