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Commit 86530b0a by LiFeng
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Fix comments and add check in lxc_poll.

Add check whether handler->conf->console.path is 'none' Signed-off-by: 's avatarLiFeng <lifeng68@huawei.com>
parent 3dc035f1
Showing with 63 additions and 43 deletions
src/lxc/conf.c
......@@ -1565,11 +1565,12 @@ static int lxc_setup_dev_console(const struct lxc_rootfs *rootfs,
{
char path[MAXPATHLEN];
int ret, fd;
char *rootfs_path = rootfs->path ? rootfs->mount : "";
if (console->path && !strcmp(console->path, "none"))
return 0;
ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->path ? rootfs->mount : "");
ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs_path);
if (ret < 0 || (size_t)ret >= sizeof(path))
return -1;
......@@ -1579,10 +1580,10 @@ static int lxc_setup_dev_console(const struct lxc_rootfs *rootfs,
if (file_exists(path)) {
ret = lxc_unstack_mountpoint(path, false);
if (ret < 0) {
ERROR("failed to unmount \"%s\": %s", path, strerror(errno));
ERROR("Failed to unmount \"%s\": %s", path, strerror(errno));
return -ret;
} else {
DEBUG("cleared all (%d) mounts from \"%s\"", ret, path);
DEBUG("Cleared all (%d) mounts from \"%s\"", ret, path);
}
}
......@@ -1592,24 +1593,26 @@ static int lxc_setup_dev_console(const struct lxc_rootfs *rootfs,
fd = open(path, O_CREAT | O_EXCL, S_IXUSR | S_IXGRP | S_IXOTH);
if (fd < 0) {
if (errno != EEXIST) {
SYSERROR("failed to create console");
SYSERROR("Failed to create console");
return -errno;
}
} else {
close(fd);
}
if (chmod(console->name, S_IXUSR | S_IXGRP | S_IXOTH)) {
SYSERROR("failed to set mode '0%o' to '%s'", S_IXUSR | S_IXGRP | S_IXOTH, console->name);
ret = chmod(console->name, S_IXUSR | S_IXGRP | S_IXOTH);
if (ret < 0) {
SYSERROR("Failed to set mode '0%o' to '%s'", S_IXUSR | S_IXGRP | S_IXOTH, console->name);
return -errno;
}
if (safe_mount(console->name, path, "none", MS_BIND, 0, rootfs->path ? rootfs->mount : "") < 0) {
ERROR("failed to mount '%s' on '%s'", console->name, path);
ret = safe_mount(console->name, path, "none", MS_BIND, 0, rootfs_path);
if (ret < 0) {
ERROR("Failed to mount '%s' on '%s'", console->name, path);
return -1;
}
DEBUG("mounted pts device \"%s\" onto \"%s\"", console->name, path);
DEBUG("Mounted pts device \"%s\" onto \"%s\"", console->name, path);
return 0;
}
......@@ -1619,78 +1622,82 @@ static int lxc_setup_ttydir_console(const struct lxc_rootfs *rootfs,
{
int ret, fd;
char path[MAXPATHLEN], lxcpath[MAXPATHLEN];
char *rootfs_path = rootfs->path ? rootfs->mount : "";
if (console->path && !strcmp(console->path, "none"))
return 0;
/* create rootfs/dev/<ttydir> directory */
ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs->path ? rootfs->mount : "", ttydir);
ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs_path, ttydir);
if (ret < 0 || (size_t)ret >= sizeof(path))
return -1;
ret = mkdir(path, 0755);
if (ret && errno != EEXIST) {
SYSERROR("failed with errno %d to create %s", errno, path);
SYSERROR("Failed with errno %d to create %s", errno, path);
return -errno;
}
DEBUG("Created directory for console and tty devices at \"%s\"", path);
ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", rootfs->path ? rootfs->mount : "", ttydir);
ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", rootfs_path, ttydir);
if (ret < 0 || (size_t)ret >= sizeof(lxcpath))
return -1;
ret = creat(lxcpath, 0660);
if (ret == -1 && errno != EEXIST) {
SYSERROR("error %d creating %s", errno, lxcpath);
SYSERROR("Error %d creating %s", errno, lxcpath);
return -errno;
}
if (ret >= 0)
close(ret);
ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->path ? rootfs->mount : "");
ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs_path);
if (ret < 0 || (size_t)ret >= sizeof(path))
return -1;
if (file_exists(path)) {
ret = lxc_unstack_mountpoint(path, false);
if (ret < 0) {
ERROR("failed to unmount \"%s\": %s", path, strerror(errno));
ERROR("Failed to unmount \"%s\": %s", path, strerror(errno));
return -ret;
} else {
DEBUG("cleared all (%d) mounts from \"%s\"", ret, path);
DEBUG("Cleared all (%d) mounts from \"%s\"", ret, path);
}
}
fd = open(path, O_CREAT | O_EXCL, S_IXUSR | S_IXGRP | S_IXOTH);
if (fd < 0) {
if (errno != EEXIST) {
SYSERROR("failed to create console");
SYSERROR("Failed to create console");
return -errno;
}
} else {
close(fd);
}
if (chmod(console->name, S_IXUSR | S_IXGRP | S_IXOTH)) {
SYSERROR("failed to set mode '0%o' to '%s'", S_IXUSR | S_IXGRP | S_IXOTH, console->name);
ret = chmod(console->name, S_IXUSR | S_IXGRP | S_IXOTH);
if (ret < 0) {
SYSERROR("Failed to set mode '0%o' to '%s'", S_IXUSR | S_IXGRP | S_IXOTH, console->name);
return -errno;
}
/* bind mount console->name to '/dev/<ttydir>/console' */
if (safe_mount(console->name, lxcpath, "none", MS_BIND, 0, rootfs->path ? rootfs->mount : "") < 0) {
ERROR("failed to mount '%s' on '%s'", console->name, lxcpath);
ret = safe_mount(console->name, lxcpath, "none", MS_BIND, 0, rootfs_path);
if (ret < 0) {
ERROR("Failed to mount '%s' on '%s'", console->name, lxcpath);
return -1;
}
DEBUG("mounted \"%s\" onto \"%s\"", console->name, lxcpath);
DEBUG("Mounted \"%s\" onto \"%s\"", console->name, lxcpath);
/* bind mount '/dev/<ttydir>/console' to '/dev/console' */
if (safe_mount(lxcpath, path, "none", MS_BIND, 0, rootfs->path ? rootfs->mount : "") < 0) {
ERROR("failed to mount '%s' on '%s'", console->name, lxcpath);
ret = safe_mount(lxcpath, path, "none", MS_BIND, 0, rootfs_path);
if (ret < 0) {
ERROR("Failed to mount '%s' on '%s'", console->name, lxcpath);
return -1;
}
DEBUG("mounted \"%s\" onto \"%s\"", console->name, lxcpath);
DEBUG("Mounted \"%s\" onto \"%s\"", console->name, lxcpath);
DEBUG("console has been setup under \"%s\" and mounted to \"%s\"", lxcpath, path);
DEBUG("Console has been setup under \"%s\" and mounted to \"%s\"", lxcpath, path);
return 0;
}
......
src/lxc/start.c
......@@ -472,19 +472,24 @@ int lxc_set_state(const char *name, struct lxc_handler *handler,
int lxc_poll(const char *name, struct lxc_handler *handler)
{
int ret;
struct lxc_console *console = &handler->conf->console;
bool has_console = true;
struct lxc_epoll_descr descr, descr_console;
if (handler->conf->console.path && !strcmp(handler->conf->console.path, "none"))
has_console = false;
ret = lxc_mainloop_open(&descr);
if (ret < 0) {
ERROR("Failed to create mainloop");
goto out_sigfd;
}
ret = lxc_mainloop_open(&descr_console);
if (ret < 0) {
ERROR("Failed to create console mainloop");
goto out_mainloop;
if (has_console) {
ret = lxc_mainloop_open(&descr_console);
if (ret < 0) {
ERROR("Failed to create console mainloop");
goto out_mainloop;
}
}
ret = lxc_mainloop_add_handler(&descr, handler->sigfd, signal_handler, handler);
......@@ -493,16 +498,20 @@ int lxc_poll(const char *name, struct lxc_handler *handler)
goto out_mainloop_console;
}
ret = lxc_console_mainloop_add(&descr, console);
if (ret < 0) {
ERROR("Failed to add console handlers to mainloop");
goto out_mainloop_console;
}
if (has_console) {
struct lxc_console *console = &handler->conf->console;
ret = lxc_console_mainloop_add(&descr_console, console);
if (ret < 0) {
ERROR("Failed to add console handlers to console mainloop");
goto out_mainloop_console;
ret = lxc_console_mainloop_add(&descr, console);
if (ret < 0) {
ERROR("Failed to add console handlers to mainloop");
goto out_mainloop_console;
}
ret = lxc_console_mainloop_add(&descr_console, console);
if (ret < 0) {
ERROR("Failed to add console handlers to console mainloop");
goto out_mainloop_console;
}
}
ret = lxc_cmd_mainloop_add(name, &descr, handler);
......@@ -519,15 +528,19 @@ int lxc_poll(const char *name, struct lxc_handler *handler)
if (ret < 0 || !handler->init_died)
goto out_mainloop;
ret = lxc_mainloop(&descr_console, 0);
if (has_console)
ret = lxc_mainloop(&descr_console, 0);
out_mainloop:
lxc_mainloop_close(&descr);
TRACE("Closed mainloop");
out_mainloop_console:
lxc_mainloop_close(&descr_console);
TRACE("Closed console mainloop");
if (has_console) {
lxc_mainloop_close(&descr_console);
TRACE("Closed console mainloop");
}
out_sigfd:
close(handler->sigfd);
......
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