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udp: bring a warning or error if the driver changes our hwtstamp options. 

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
master
Richard Cochran 2011-12-18 09:35:41 +01:00
parent b0d547cac4
commit 447d4d442c
1 changed files with 13 additions and 2 deletions
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15
udp.c
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@ -42,7 +42,7 @@
static int hwts_init(int fd, char *device) static int hwts_init(int fd, char *device)
{ {
struct ifreq ifreq; struct ifreq ifreq;
struct hwtstamp_config cfg; struct hwtstamp_config cfg, req;
int err; int err;
memset(&ifreq, 0, sizeof(ifreq)); memset(&ifreq, 0, sizeof(ifreq));
@ -54,11 +54,22 @@ static int hwts_init(int fd, char *device)
cfg.tx_type = HWTSTAMP_TX_ON; cfg.tx_type = HWTSTAMP_TX_ON;
cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
req = cfg;
err = ioctl(fd, SIOCSHWTSTAMP, &ifreq); err = ioctl(fd, SIOCSHWTSTAMP, &ifreq);
if (err < 0) if (err < 0)
pr_err("ioctl SIOCSHWTSTAMP failed: %m"); pr_err("ioctl SIOCSHWTSTAMP failed: %m");
printf("tx_type %d\n" "rx_filter %d\n", cfg.tx_type, cfg.rx_filter); if (memcmp(&cfg, &req, sizeof(cfg))) {
pr_warning("driver changed our HWTSTAMP options");
pr_warning("tx_type %d not %d", cfg.tx_type, req.tx_type);
pr_warning("rx_filter %d not %d", cfg.rx_filter, req.rx_filter);
if (cfg.tx_type != HWTSTAMP_TX_ON ||
cfg.rx_filter != HWTSTAMP_FILTER_ALL) {
return -1;
}
}
return err ? errno : 0; return err ? errno : 0;
} }