From fc1be3d5ab4863c173796fe23f4ed00984d6ce8a Mon Sep 17 00:00:00 2001 From: David Gibson Date: Mon, 12 Sep 2022 22:24:05 +1000 Subject: Clean up and rename conf_ns_open() conf_ns_open() opens file descriptors for the namespaces pasta needs, but it doesnt really have anything to do with configuration any more. For better clarity, move it to pasta.c and rename it pasta_open_ns(). This makes the symmetry between it and pasta_start_ns() more clear, since these represent the two basic ways that pasta can operate, either attaching to an existing namespace/process or spawning a new one. Since its no longer validating options, the errors it could return shouldn't cause a usage message. Just exit directly with an error instead. Signed-off-by: David Gibson --- conf.c | 72 +----------------------------------------------------------------- 1 file changed, 1 insertion(+), 71 deletions(-) (limited to 'conf.c') diff --git a/conf.c b/conf.c index d1afea9..8477a6e 100644 --- a/conf.c +++ b/conf.c @@ -20,7 +20,6 @@ #include #include #include -#include #include #include #include @@ -574,73 +573,6 @@ static int conf_pasta_ns(int *netns_only, char *userns, char *netns, return 0; } -/** - * conf_ns_check() - Check if we can enter configured namespaces - * @arg: Execution context - * - * Return: 0 - */ -static int conf_ns_check(void *arg) -{ - struct ctx *c = (struct ctx *)arg; - - if ((!c->netns_only && setns(c->pasta_userns_fd, CLONE_NEWUSER)) || - setns(c->pasta_netns_fd, CLONE_NEWNET)) - c->pasta_userns_fd = c->pasta_netns_fd = -1; - - return 0; - -} - -/** - * conf_ns_open() - Open network, user namespaces descriptors from configuration - * @c: Execution context - * @userns: --userns argument, can be an empty string - * @netns: network namespace path - * - * Return: 0 on success, negative error code otherwise - */ -static int conf_ns_open(struct ctx *c, const char *userns, const char *netns) -{ - int ufd = -1, nfd = -1; - - nfd = open(netns, O_RDONLY | O_CLOEXEC); - if (nfd < 0) { - err("Couldn't open network namespace %s", netns); - return -ENOENT; - } - - if (!c->netns_only && *userns) { - ufd = open(userns, O_RDONLY | O_CLOEXEC); - if (ufd < 0) { - close(nfd); - err("Couldn't open user namespace %s", userns); - return -ENOENT; - } - } - - c->pasta_netns_fd = nfd; - c->pasta_userns_fd = ufd; - - NS_CALL(conf_ns_check, c); - - if (c->pasta_netns_fd < 0) { - err("Couldn't switch to pasta namespaces"); - return -ENOENT; - } - - if (!c->no_netns_quit) { - char buf[PATH_MAX]; - - strncpy(buf, netns, PATH_MAX); - strncpy(c->netns_base, basename(buf), PATH_MAX - 1); - strncpy(buf, netns, PATH_MAX); - strncpy(c->netns_dir, dirname(buf), PATH_MAX - 1); - } - - return 0; -} - /** * conf_ip4() - Verify or detect IPv4 support, get relevant addresses * @ifi: Host interface to attempt (0 to determine one) @@ -1598,9 +1530,7 @@ void conf(struct ctx *c, int argc, char **argv) if (c->mode == MODE_PASTA) { if (*netns) { - ret = conf_ns_open(c, userns, netns); - if (ret < 0) - usage(argv[0]); + pasta_open_ns(c, userns, netns); } else { pasta_start_ns(c, argc - optind, argv + optind); } -- cgit v1.2.3