diff options
Diffstat (limited to 'sbin/devd/devd.cc')
| -rw-r--r-- | sbin/devd/devd.cc | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/sbin/devd/devd.cc b/sbin/devd/devd.cc index 447ab87..cdeadf9 100644 --- a/sbin/devd/devd.cc +++ b/sbin/devd/devd.cc @@ -104,6 +104,19 @@ __FBSDID("$FreeBSD$"); #define CF "/etc/devd.conf" #define SYSCTL "hw.bus.devctl_disable" +/* + * Since the client socket is nonblocking, we must increase its send buffer to + * handle brief event storms. On FreeBSD, AF_UNIX sockets don't have a receive + * buffer, so the client can't increate the buffersize by itself. + * + * For example, when creating a ZFS pool, devd emits one 165 character + * resource.fs.zfs.statechange message for each vdev in the pool. A 64k + * buffer has enough space for almost 400 drives, which would be very large but + * not impossibly large pool. A 128k buffer has enough space for 794 drives, + * which is more than can fit in a rack with modern technology. + */ +#define CLIENT_BUFSIZE 131072 + using namespace std; extern FILE *yyin; @@ -759,7 +772,7 @@ process_event(char *buffer) char *sp; sp = buffer + 1; - devdlog(LOG_DEBUG, "Processing event '%s'\n", buffer); + devdlog(LOG_INFO, "Processing event '%s'\n", buffer); type = *buffer++; cfg.push_var_table(); // No match doesn't have a device, and the format is a little @@ -892,6 +905,7 @@ void new_client(int fd) { int s; + int sndbuf_size; /* * First go reap any zombie clients, then accept the connection, and @@ -901,10 +915,15 @@ new_client(int fd) check_clients(); s = accept(fd, NULL, NULL); if (s != -1) { + sndbuf_size = CLIENT_BUFSIZE; + if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sndbuf_size, + sizeof(sndbuf_size))) + err(1, "setsockopt"); shutdown(s, SHUT_RD); clients.push_back(s); ++num_clients; - } + } else + err(1, "accept"); } static void @@ -970,7 +989,7 @@ event_loop(void) } rv = select(max_fd, &fds, NULL, NULL, &tv); if (got_siginfo) { - devdlog(LOG_INFO, "Events received so far=%u\n", + devdlog(LOG_NOTICE, "Events received so far=%u\n", total_events); got_siginfo = 0; } |
