[PATCH v4 08/12] unix-socket: add backlog size option to unix_stream_listen()
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From: Jeff Hostetler via GitGitGadget <hidden>
Date: 2021-02-17 21:50:51
Subsystem:
the rest · Maintainer:
Linus Torvalds
Status: Superseded by v7 (posted 2021-03-22). [go to v7]
Revision v4 (6 revisions archived).
Revisions (6)
From: Jeff Hostetler <redacted> Update `unix_stream_listen()` to take an options structure to override default behaviors. This commit includes the size of the `listen()` backlog. Signed-off-by: Jeff Hostetler <redacted> --- builtin/credential-cache--daemon.c | 3 ++- unix-socket.c | 9 +++++++-- unix-socket.h | 14 +++++++++++++- 3 files changed, 22 insertions(+), 4 deletions(-)
diff --git a/builtin/credential-cache--daemon.c b/builtin/credential-cache--daemon.c
index c61f123a3b81..4c6c89ab0de2 100644
--- a/builtin/credential-cache--daemon.c
+++ b/builtin/credential-cache--daemon.c@@ -203,9 +203,10 @@ static int serve_cache_loop(int fd) static void serve_cache(const char *socket_path, int debug) { + struct unix_stream_listen_opts opts = UNIX_STREAM_LISTEN_OPTS_INIT; int fd; - fd = unix_stream_listen(socket_path); + fd = unix_stream_listen(socket_path, &opts); if (fd < 0) die_errno("unable to bind to '%s'", socket_path);
diff --git a/unix-socket.c b/unix-socket.c
index 69f81d64e9d5..5ac7dafe9828 100644
--- a/unix-socket.c
+++ b/unix-socket.c@@ -89,9 +89,11 @@ int unix_stream_connect(const char *path) return -1; } -int unix_stream_listen(const char *path) +int unix_stream_listen(const char *path, + const struct unix_stream_listen_opts *opts) { int fd = -1, saved_errno; + int backlog; struct sockaddr_un sa; struct unix_sockaddr_context ctx;
@@ -106,7 +108,10 @@ int unix_stream_listen(const char *path) if (bind(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0) goto fail; - if (listen(fd, 5) < 0) + backlog = opts->listen_backlog_size; + if (backlog <= 0) + backlog = DEFAULT_UNIX_STREAM_LISTEN_BACKLOG; + if (listen(fd, backlog) < 0) goto fail; unix_sockaddr_cleanup(&ctx);
diff --git a/unix-socket.h b/unix-socket.h
index e271aeec5a07..06a5a05b03fe 100644
--- a/unix-socket.h
+++ b/unix-socket.h@@ -1,7 +1,19 @@ #ifndef UNIX_SOCKET_H #define UNIX_SOCKET_H +struct unix_stream_listen_opts { + int listen_backlog_size; +}; + +#define DEFAULT_UNIX_STREAM_LISTEN_BACKLOG (5) + +#define UNIX_STREAM_LISTEN_OPTS_INIT \ +{ \ + .listen_backlog_size = DEFAULT_UNIX_STREAM_LISTEN_BACKLOG, \ +} + int unix_stream_connect(const char *path); -int unix_stream_listen(const char *path); +int unix_stream_listen(const char *path, + const struct unix_stream_listen_opts *opts); #endif /* UNIX_SOCKET_H */
--
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