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author | Yu Watanabe <watanabe.yu+github@gmail.com> | 2018-08-24 10:05:22 +0200 |
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committer | Yu Watanabe <watanabe.yu+github@gmail.com> | 2018-09-11 05:45:21 +0200 |
commit | a9808d844549fe4563e1ce373a75ebd17e35b72a (patch) | |
tree | f6e67cdb83b7aa567b52b8fcf1651ee04e9352f9 | |
parent | libudev-monitor: re-implement udev_monitor_receive_sd_device() (diff) | |
download | systemd-a9808d844549fe4563e1ce373a75ebd17e35b72a.tar.xz systemd-a9808d844549fe4563e1ce373a75ebd17e35b72a.zip |
libudev-monitor: introduce udev_monitor_send_sd_device()
And use it in udev_monitor_send_device().
-rw-r--r-- | src/libudev/libudev-monitor.c | 62 |
1 files changed, 40 insertions, 22 deletions
diff --git a/src/libudev/libudev-monitor.c b/src/libudev/libudev-monitor.c index 2bd820e92d..c733340c5f 100644 --- a/src/libudev/libudev-monitor.c +++ b/src/libudev/libudev-monitor.c @@ -659,11 +659,11 @@ _public_ struct udev_device *udev_monitor_receive_device(struct udev_monitor *ud return udev_device_new(udev_monitor->udev, device); } -int udev_monitor_send_device(struct udev_monitor *udev_monitor, - struct udev_monitor *destination, struct udev_device *udev_device) -{ - const char *buf, *val; - ssize_t blen, count; +static int udev_monitor_send_sd_device( + struct udev_monitor *udev_monitor, + struct udev_monitor *destination, + sd_device *device) { + struct udev_monitor_netlink_header nlh = { .prefix = "libudev", .magic = htobe32(UDEV_MONITOR_MAGIC), @@ -676,27 +676,37 @@ int udev_monitor_send_device(struct udev_monitor *udev_monitor, .msg_iov = iov, .msg_iovlen = 2, }; - struct udev_list_entry *list_entry; uint64_t tag_bloom_bits; + const char *buf, *val; + ssize_t count; + size_t blen; + int r; + + assert(udev_monitor); + assert(device); - blen = udev_device_get_properties_monitor_buf(udev_device, &buf); + r = device_get_properties_nulstr(device, (const uint8_t **) &buf, &blen); + if (r < 0) + return log_debug_errno(r, "Failed to get device properties: %m"); if (blen < 32) { - log_debug("device buffer is too small to contain a valid device"); + log_debug("Device buffer is too small to contain a valid device"); return -EINVAL; } /* fill in versioned header */ - val = udev_device_get_subsystem(udev_device); + r = sd_device_get_subsystem(device, &val); + if (r < 0) + return log_debug_errno(r, "Failed to get device subsystem: %m"); nlh.filter_subsystem_hash = htobe32(util_string_hash32(val)); - val = udev_device_get_devtype(udev_device); - if (val != NULL) + if (sd_device_get_devtype(device, &val) >= 0 && val) nlh.filter_devtype_hash = htobe32(util_string_hash32(val)); /* add tag bloom filter */ tag_bloom_bits = 0; - udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device)) - tag_bloom_bits |= util_string_bloom64(udev_list_entry_get_name(list_entry)); + FOREACH_DEVICE_TAG(device, val) + tag_bloom_bits |= util_string_bloom64(val); + if (tag_bloom_bits > 0) { nlh.filter_tag_bloom_hi = htobe32(tag_bloom_bits >> 32); nlh.filter_tag_bloom_lo = htobe32(tag_bloom_bits & 0xffffffff); @@ -705,8 +715,10 @@ int udev_monitor_send_device(struct udev_monitor *udev_monitor, /* add properties list */ nlh.properties_off = iov[0].iov_len; nlh.properties_len = blen; - iov[1].iov_base = (char *)buf; - iov[1].iov_len = blen; + iov[1] = (struct iovec) { + .iov_base = (char*) buf, + .iov_len = blen, + }; /* * Use custom address for target, or the default one. @@ -714,24 +726,30 @@ int udev_monitor_send_device(struct udev_monitor *udev_monitor, * If we send to a multicast group, we will get * ECONNREFUSED, which is expected. */ - if (destination) - smsg.msg_name = &destination->snl; - else - smsg.msg_name = &udev_monitor->snl_destination; + smsg.msg_name = destination ? &destination->snl : &udev_monitor->snl_destination; smsg.msg_namelen = sizeof(struct sockaddr_nl); count = sendmsg(udev_monitor->sock, &smsg, 0); if (count < 0) { if (!destination && errno == ECONNREFUSED) { - log_debug("passed device to netlink monitor %p", udev_monitor); + log_debug("Passed device to netlink monitor %p", udev_monitor); return 0; } else - return -errno; + return log_debug_errno(errno, "Failed to send device to netlink monitor %p", udev_monitor); } - log_debug("passed %zi byte device to netlink monitor %p", count, udev_monitor); + log_debug("Passed %zi byte device to netlink monitor %p", count, udev_monitor); return count; } +int udev_monitor_send_device( + struct udev_monitor *udev_monitor, + struct udev_monitor *destination, + struct udev_device *udev_device) { + assert(udev_device); + + return udev_monitor_send_sd_device(udev_monitor, destination, udev_device->device); +} + /** * udev_monitor_filter_add_match_subsystem_devtype: * @udev_monitor: the monitor |