From 4a0ab3a8fd59d38dabb9a7096939d8d8e8adc62f Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 16 Dec 2013 17:04:36 +0100 Subject: [PATCH] util: try harder to increase the send/recv buffers of sockets If we have the priviliges we will try SO_SNDBUFFORCE/SO_RCVBUFFORCE and only fall back to SO_SNDBUF/SO_RCVBUF if that fails. --- src/shared/util.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-) diff --git a/src/shared/util.c b/src/shared/util.c index 02bae90..8824b9b 100644 --- a/src/shared/util.c +++ b/src/shared/util.c @@ -4928,15 +4928,15 @@ int fd_inc_sndbuf(int fd, size_t n) { socklen_t l = sizeof(value); r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); - if (r >= 0 && - l == sizeof(value) && - (size_t) value >= n*2) + if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) return 0; + /* If we have the privileges we will ignore the kernel limit. */ + value = (int) n; - r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); - if (r < 0) - return -errno; + if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) + if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) + return -errno; return 1; } @@ -4946,16 +4946,15 @@ int fd_inc_rcvbuf(int fd, size_t n) { socklen_t l = sizeof(value); r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); - if (r >= 0 && - l == sizeof(value) && - (size_t) value >= n*2) + if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) return 0; - value = (int) n; - r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); - if (r < 0) - return -errno; + /* If we have the privileges we will ignore the kernel limit. */ + value = (int) n; + if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) + if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) + return -errno; return 1; }