From 50e7aa5e8892cd2f0e3197cc5a0bcf289af7f16d Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 6 Jul 2018 17:56:58 +0200 Subject: [PATCH 198/268] pr-helper: Rework socket path handling RH-Author: Paolo Bonzini Message-id: <20180706175659.30615-9-pbonzini@redhat.com> Patchwork-id: 81252 O-Subject: [RHEL7.6 qemu-kvm-rhev PATCH 8/9] pr-helper: Rework socket path handling Bugzilla: 1533158 RH-Acked-by: Laurent Vivier RH-Acked-by: Stefan Hajnoczi RH-Acked-by: Michal Privoznik From: Michal Privoznik When reviewing Paolo's pr-helper patches I've noticed couple of problems: 1) socket_path needs to be calculated at two different places (one for printing out help, the other if socket activation is NOT used), 2) even though the default socket_path is allocated in compute_default_paths() it is the only default path the function handles. For instance, pidfile is allocated outside of this function. And yet again, at different places than 1) Signed-off-by: Michal Privoznik Message-Id: Signed-off-by: Paolo Bonzini (cherry picked from commit 2729d79d4993099782002c9a218de1fc12c32c69) Signed-off-by: Miroslav Rezanina --- scsi/qemu-pr-helper.c | 36 ++++++++++-------------------------- 1 file changed, 10 insertions(+), 26 deletions(-) diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c index c89a446..1528a71 100644 --- a/scsi/qemu-pr-helper.c +++ b/scsi/qemu-pr-helper.c @@ -76,14 +76,12 @@ static int gid = -1; static void compute_default_paths(void) { - if (!socket_path) { - socket_path = qemu_get_local_state_pathname("run/qemu-pr-helper.sock"); - } + socket_path = qemu_get_local_state_pathname("run/qemu-pr-helper.sock"); + pidfile = qemu_get_local_state_pathname("run/qemu-pr-helper.pid"); } static void usage(const char *name) { - compute_default_paths(); (printf) ( "Usage: %s [OPTIONS] FILE\n" "Persistent Reservation helper program for QEMU\n" @@ -841,19 +839,6 @@ static gboolean accept_client(QIOChannel *ioc, GIOCondition cond, gpointer opaqu return TRUE; } - -/* - * Check socket parameters compatibility when socket activation is used. - */ -static const char *socket_activation_validate_opts(void) -{ - if (socket_path != NULL) { - return "Unix socket can't be set when using socket activation"; - } - - return NULL; -} - static void termsig_handler(int signum) { atomic_cmpxchg(&state, RUNNING, TERMINATE); @@ -927,6 +912,7 @@ int main(int argc, char **argv) char *trace_file = NULL; bool daemonize = false; bool pidfile_specified = false; + bool socket_path_specified = false; unsigned socket_activation; struct sigaction sa_sigterm; @@ -943,12 +929,14 @@ int main(int argc, char **argv) qemu_add_opts(&qemu_trace_opts); qemu_init_exec_dir(argv[0]); - pidfile = qemu_get_local_state_pathname("run/qemu-pr-helper.pid"); + compute_default_paths(); while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { switch (ch) { case 'k': - socket_path = optarg; + g_free(socket_path); + socket_path = g_strdup(optarg); + socket_path_specified = true; if (socket_path[0] != '/') { error_report("socket path must be absolute"); exit(EXIT_FAILURE); @@ -1039,10 +1027,9 @@ int main(int argc, char **argv) socket_activation = check_socket_activation(); if (socket_activation == 0) { SocketAddress saddr; - compute_default_paths(); saddr = (SocketAddress){ .type = SOCKET_ADDRESS_TYPE_UNIX, - .u.q_unix.path = g_strdup(socket_path) + .u.q_unix.path = socket_path, }; server_ioc = qio_channel_socket_new(); if (qio_channel_socket_listen_sync(server_ioc, &saddr, &local_err) < 0) { @@ -1050,12 +1037,10 @@ int main(int argc, char **argv) error_report_err(local_err); return 1; } - g_free(saddr.u.q_unix.path); } else { /* Using socket activation - check user didn't use -p etc. */ - const char *err_msg = socket_activation_validate_opts(); - if (err_msg != NULL) { - error_report("%s", err_msg); + if (socket_path_specified) { + error_report("Unix socket can't be set when using socket activation"); exit(EXIT_FAILURE); } @@ -1072,7 +1057,6 @@ int main(int argc, char **argv) error_get_pretty(local_err)); exit(EXIT_FAILURE); } - socket_path = NULL; } if (qemu_init_main_loop(&local_err)) { -- 1.8.3.1