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parasite: Precreate daemon control sockets

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Now we have netns on pstree-item and have the place
where to pre-create daemon socket in needed namespace.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov 2014-09-29 22:05:43 +04:00
parent 80efa564f4
commit 45fd143409
2 changed files with 14 additions and 18 deletions
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8
net.c
View File

@ -652,6 +652,12 @@ static int prep_ns_sockets(struct ns_id *ns)
goto err_nl;
}
ret = ns->net.seqsk = socket(PF_UNIX, SOCK_SEQPACKET, 0);
if (ret < 0) {
pr_perror("Can't create seqsk for parasite");
goto err_sq;
}
ret = 0;
out:
if (nsret >= 0 && restore_ns(nsret, &net_ns_desc) < 0) {
@ -663,6 +669,8 @@ out:
return ret;
err_ret:
close(ns->net.seqsk);
err_sq:
close(ns->net.nlsk);
err_nl:
goto out;

24
parasite-syscall.c
View File

@ -435,7 +435,7 @@ static int restore_child_handler()
}
static int prepare_tsock(struct parasite_ctl *ctl, pid_t pid,
struct parasite_init_args *args)
struct parasite_init_args *args, struct ns_id *net)
{
static int ssock = -1;
@ -443,20 +443,8 @@ static int prepare_tsock(struct parasite_ctl *ctl, pid_t pid,
args->h_addr_len = gen_parasite_saddr(&args->h_addr, getpid());
if (ssock == -1) {
int rst = -1;
pr_info("Switching to %d's net for tsock creation\n", pid);
if (switch_ns(pid, &net_ns_desc, &rst))
return -1;
ssock = socket(PF_UNIX, SOCK_SEQPACKET, 0);
if (ssock < 0)
pr_perror("Can't create socket");
if (rst >= 0 && restore_ns(rst, &net_ns_desc) < 0)
return -1;
if (ssock < 0)
return -1;
ssock = net->net.seqsk;
net->net.seqsk = -1;
if (bind(ssock, (struct sockaddr *)&args->h_addr, args->h_addr_len) < 0) {
pr_perror("Can't bind socket");
@ -496,7 +484,7 @@ static int accept_tsock(struct parasite_ctl *ctl)
return 0;
}
static int parasite_init_daemon(struct parasite_ctl *ctl)
static int parasite_init_daemon(struct parasite_ctl *ctl, struct ns_id *net)
{
struct parasite_init_args *args;
pid_t pid = ctl->pid.real;
@ -510,7 +498,7 @@ static int parasite_init_daemon(struct parasite_ctl *ctl)
args->sigframe = ctl->rsigframe;
args->log_level = log_get_loglevel();
if (prepare_tsock(ctl, pid, args))
if (prepare_tsock(ctl, pid, args, net))
goto err;;
/* after this we can catch parasite errors in chld handler */
@ -1164,7 +1152,7 @@ static int parasite_start_daemon(struct parasite_ctl *ctl, struct pstree_item *i
if (construct_sigframe(ctl->sigframe, ctl->rsigframe, item->core[0]))
return -1;
if (parasite_init_daemon(ctl))
if (parasite_init_daemon(ctl, dmpi(item)->netns))
return -1;;
return 0;