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From ef27d69db952dc64fc3c476a89c3e822c891e663 Mon Sep 17 00:00:00 2001
From: haozi007 <liuhao27@huawei.com>
Date: Mon, 17 Jul 2023 20:40:48 +0800
Subject: [PATCH 2/3] [iSulad] adapt security conf attach cgroup and start
Signed-off-by: haozi007 <liuhao27@huawei.com>
---
src/lxc/attach.c | 503 ++++++++++-
src/lxc/attach.h | 6 +
src/lxc/attach_options.h | 25 +
src/lxc/cgroups/cgroup.c | 5 +-
src/lxc/cgroups/cgroup.h | 7 +
src/lxc/conf.c | 1703 +++++++++++++++++++++++++++++++++++-
src/lxc/conf.h | 82 ++
src/lxc/isulad_utils.c | 25 +
src/lxc/isulad_utils.h | 26 +-
src/lxc/lsm/apparmor.c | 14 +
src/lxc/lsm/lsm.h | 4 +
src/lxc/lsm/nop.c | 14 +
src/lxc/lsm/selinux.c | 256 ++++++
src/lxc/lxc.h | 7 +
src/lxc/lxclock.c | 27 +
src/lxc/lxclock.h | 4 +
src/lxc/mainloop.c | 16 +
src/lxc/mainloop.h | 4 +
src/lxc/mount_utils.c | 5 +
src/lxc/seccomp.c | 32 +
src/lxc/start.h | 11 +
src/lxc/tools/arguments.h | 28 +
src/lxc/tools/lxc_attach.c | 490 ++++++++++-
src/lxc/tools/lxc_start.c | 107 ++-
24 files changed, 3376 insertions(+), 25 deletions(-)
diff --git a/src/lxc/attach.c b/src/lxc/attach.c
index f086e96..1a89001 100644
--- a/src/lxc/attach.c
+++ b/src/lxc/attach.c
@@ -47,6 +47,24 @@
#include "terminal.h"
#include "utils.h"
+#ifdef HAVE_ISULAD
+#include "exec_commands.h"
+
+typedef enum {
+ ATTACH_INIT,
+ ATTACH_TIMEOUT,
+ ATTACH_MAX,
+} attach_timeout_t;
+
+static volatile attach_timeout_t g_attach_timeout_state = ATTACH_INIT;
+
+struct attach_timeout_conf {
+ int64_t timeout;
+ unsigned long long start_time;
+ pid_t pid;
+};
+#endif
+
lxc_log_define(attach, lxc);
/* Define default options if no options are supplied by the user. */
@@ -1115,6 +1133,9 @@ struct attach_payload {
struct attach_context *ctx;
lxc_attach_exec_t exec_function;
void *exec_payload;
+#ifdef HAVE_ISULAD
+ struct lxc_terminal *terminal;
+#endif
};
static void put_attach_payload(struct attach_payload *p)
@@ -1127,6 +1148,48 @@ static void put_attach_payload(struct attach_payload *p)
}
}
+#ifdef HAVE_ISULAD
+static int isulad_set_attach_pipes(struct lxc_terminal *terminal)
+{
+ int ret = 0;
+ if (terminal->pipes[0][1] >= 0) {
+ close(terminal->pipes[0][1]);
+ terminal->pipes[0][1] = -1;
+ }
+
+ if (terminal->pipes[0][0] >= 0) {
+ ret = dup2(terminal->pipes[0][0], STDIN_FILENO);
+ if (ret < 0)
+ goto out;
+ }
+
+ if (terminal->pipes[1][0] >= 0) {
+ close(terminal->pipes[1][0]);
+ terminal->pipes[1][0] = -1;
+ }
+
+ if (terminal->pipes[1][1] >= 0) {
+ ret = dup2(terminal->pipes[1][1], STDOUT_FILENO);
+ if (ret < 0)
+ goto out;
+ }
+ if (terminal->pipes[2][0] >= 0) {
+ close(terminal->pipes[2][0]);
+ terminal->pipes[2][0] = -1;
+ }
+
+ if (terminal->pipes[2][1] >= 0) {
+ ret = dup2(terminal->pipes[2][1], STDERR_FILENO);
+ if (ret < 0)
+ goto out;
+ }
+
+ setsid();
+out:
+ return ret;
+}
+#endif
+
__noreturn static void do_attach(struct attach_payload *ap)
{
lxc_attach_exec_t attach_function = move_ptr(ap->exec_function);
@@ -1135,6 +1198,31 @@ __noreturn static void do_attach(struct attach_payload *ap)
lxc_attach_options_t* options = ap->options;
struct attach_context *ctx = ap->ctx;
struct lxc_conf *conf = ctx->container->lxc_conf;
+#ifdef HAVE_ISULAD
+ int msg_fd = -1;
+ sigset_t mask;
+
+ /*isulad: record errpipe fd*/
+ msg_fd = init_ctx->container->lxc_conf->errpipe[1];
+ init_ctx->container->lxc_conf->errpipe[1] = -1;
+ /*isulad: set system umask */
+ umask(init_ctx->container->lxc_conf->umask);
+
+ /*isulad: restore default signal handlers and unblock all signals*/
+ for (int i = 1; i < NSIG; i++)
+ signal(i, SIG_DFL);
+
+ ret = sigfillset(&mask);
+ if (ret < 0) {
+ SYSERROR("Failed to fill signal mask");
+ goto on_error;;
+ }
+ ret = sigprocmask(SIG_UNBLOCK, &mask, NULL);
+ if (ret < 0) {
+ SYSERROR("Failed to set signal mask");
+ goto on_error;
+ }
+#endif
/*
* We currently artificially restrict core scheduling to be a pid
@@ -1209,6 +1297,27 @@ __noreturn static void do_attach(struct attach_payload *ap)
TRACE("Dropped capabilities");
}
+#ifdef HAVE_ISULAD
+ /* isulad: set workdir */
+ if (options->initial_cwd || conf->init_cwd) {
+ char *init_cwd;
+ init_cwd = options->initial_cwd ? options->initial_cwd : conf->init_cwd;
+ /* try to create workdir if not exist */
+ struct stat st;
+ if (stat(init_cwd, &st) < 0 && mkdir_p(init_cwd, 0750) < 0) {
+ SYSERROR("Try to create directory \"%s\" as workdir failed when attach", init_cwd);
+ lxc_write_error_message(msg_fd, "Try to create directory \"%s\" as workdir failed when attach: %s",
+ init_cwd, strerror(errno));
+ goto on_error;
+ }
+ if (chdir(init_cwd)) {
+ SYSERROR("Could not change directory to \"%s\" when attach", init_cwd);
+ lxc_write_error_message(msg_fd, "Could not change directory to \"%s\" when attach: %s",
+ init_cwd, strerror(errno));
+ goto on_error;
+ }
+ }
+#endif
/* Always set the environment (specify (LXC_ATTACH_KEEP_ENV, NULL, NULL)
* if you want this to be a no-op).
*/
@@ -1248,6 +1357,7 @@ __noreturn static void do_attach(struct attach_payload *ap)
goto on_error;
}
+#ifndef HAVE_ISULAD
if ((options->attach_flags & LXC_ATTACH_SETGROUPS) &&
options->groups.size > 0) {
if (!lxc_setgroups(options->groups.list, options->groups.size))
@@ -1256,6 +1366,7 @@ __noreturn static void do_attach(struct attach_payload *ap)
if (!lxc_drop_groups() && errno != EPERM)
goto on_error;
}
+#endif
if (options->namespaces & CLONE_NEWUSER)
if (!lxc_switch_uid_gid(ctx->setup_ns_uid, ctx->setup_ns_gid))
@@ -1274,6 +1385,13 @@ __noreturn static void do_attach(struct attach_payload *ap)
TRACE("Set %s LSM label to \"%s\"", ctx->lsm_ops->name, ctx->lsm_label);
}
+#ifdef HAVE_ISULAD
+ // isulad: set env home in container
+ if (lxc_setup_env_home(ctx->setup_ns_uid != LXC_INVALID_UID ? ctx->setup_ns_uid : 0) < 0) {
+ goto on_error;
+ }
+#endif
+
if (conf->no_new_privs || (options->attach_flags & LXC_ATTACH_NO_NEW_PRIVS)) {
ret = prctl(PR_SET_NO_NEW_PRIVS, prctl_arg(1), prctl_arg(0),
prctl_arg(0), prctl_arg(0));
@@ -1327,7 +1445,21 @@ __noreturn static void do_attach(struct attach_payload *ap)
}
if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+#ifdef HAVE_ISULAD
+ /* isulad: dup2 pipe[0][0] to container stdin, pipe[1][1] to container stdout, pipe[2][1] to container stderr */
+ if (ap->terminal->disable_pty) {
+ ret = isulad_set_attach_pipes(ap->terminal);
+ if (ret < 0) {
+ SYSERROR("Failed to prepare terminal file pipes");
+ goto on_error;
+ }
+ } else {
+#else
ret = lxc_terminal_prepare_login(ap->terminal_pts_fd);
+#endif
+#ifdef HAVE_ISULAD
+ }
+#endif
if (ret < 0) {
SYSERROR("Failed to prepare terminal file descriptor %d", ap->terminal_pts_fd);
goto on_error;
@@ -1343,6 +1475,20 @@ __noreturn static void do_attach(struct attach_payload *ap)
if (ctx->setup_ns_gid == ctx->target_ns_gid)
ctx->target_ns_gid = LXC_INVALID_GID;
+#ifdef HAVE_ISULAD
+ if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
+ SYSERROR("Failed to keep permitted capabilities");
+ goto on_error;
+ }
+ if ((options->attach_flags & LXC_ATTACH_SETGROUPS) &&
+ options->groups.size > 0) {
+ if (!lxc_setgroups(options->groups.list, options->groups.size))
+ goto on_error;
+ } else {
+ if (!lxc_drop_groups() && errno != EPERM)
+ goto on_error;
+ }
+#endif
/*
* Make sure that the processes STDIO is correctly owned by the user
* that we are switching to.
@@ -1367,6 +1513,18 @@ __noreturn static void do_attach(struct attach_payload *ap)
if (!lxc_switch_uid_gid(ctx->target_ns_uid, ctx->target_ns_gid))
goto on_error;
+#ifdef HAVE_ISULAD
+ if (prctl(PR_SET_KEEPCAPS, 0) < 0) {
+ SYSERROR("Failed to clear permitted capabilities");
+ goto on_error;
+ }
+
+ if (lxc_drop_caps(conf) != 0) {
+ ERROR("Failed to drop caps.");
+ goto on_error;
+ }
+#endif
+
put_attach_payload(ap);
/* We're done, so we can now do whatever the user intended us to do. */
@@ -1378,13 +1536,37 @@ on_error:
_exit(EXIT_FAILURE);
}
+#ifdef HAVE_ISULAD
+static int lxc_attach_terminal(const char *name, const char *lxcpath, struct lxc_conf *conf,
+ struct lxc_terminal *terminal, lxc_attach_options_t *options)
+#else
static int lxc_attach_terminal(const char *name, const char *lxcpath, struct lxc_conf *conf,
struct lxc_terminal *terminal)
+#endif
{
int ret;
lxc_terminal_init(terminal);
+#ifdef HAVE_ISULAD
+ /* isulad: if we pass fifo in option, use them as init fifos */
+ if (options->init_fifo[0]) {
+ free(terminal->init_fifo[0]);
+ terminal->init_fifo[0] = safe_strdup(options->init_fifo[0]);
+ }
+ if (options->init_fifo[1]) {
+ free(terminal->init_fifo[1]);
+ terminal->init_fifo[1] = safe_strdup(options->init_fifo[1]);
+ }
+ if (options->init_fifo[2]) {
+ free(terminal->init_fifo[2]);
+ terminal->init_fifo[2] = safe_strdup(options->init_fifo[2]);
+ }
+
+ terminal->disable_pty = options->disable_pty;
+ terminal->open_stdin = options->open_stdin;
+#endif
+
ret = lxc_terminal_create(name, lxcpath, conf, terminal);
if (ret < 0)
return syserror("Failed to create terminal");
@@ -1430,9 +1612,128 @@ static inline void lxc_attach_terminal_close_log(struct lxc_terminal *terminal)
close_prot_errno_disarm(terminal->log_fd);
}
+#ifdef HAVE_ISULAD
+/* isulad: attach timeout thread function */
+static void* wait_attach_timeout(void *arg)
+{
+ struct attach_timeout_conf *conf = (struct attach_timeout_conf *)arg;
+
+ if (!conf || conf->timeout < 1)
+ goto out;
+ sleep(conf->timeout);
+ if (lxc_process_alive(conf->pid, conf->start_time)) {
+ g_attach_timeout_state = ATTACH_TIMEOUT;
+ if (kill(conf->pid, SIGKILL) < 0) {
+ ERROR("Failed to send signal %d to pid %d", SIGKILL, conf->pid);
+ }
+ }
+
+out:
+ free(conf);
+ return ((void *)0);
+}
+
+/* isulad: create attach timeout thread */
+static int create_attach_timeout_thread(int64_t attach_timeout, pid_t pid)
+{
+ int ret = 0;
+ pthread_t ptid;
+ pthread_attr_t attr;
+ struct attach_timeout_conf *timeout_conf = NULL;
+
+ timeout_conf = malloc(sizeof(struct attach_timeout_conf));
+ if (timeout_conf == NULL) {
+ ERROR("Failed to malloc attach timeout conf");
+ ret = -1;
+ goto out;
+ }
+
+ memset(timeout_conf, 0, sizeof(struct attach_timeout_conf));
+ timeout_conf->timeout = attach_timeout;
+ timeout_conf->pid = pid;
+ timeout_conf->start_time = lxc_get_process_startat(pid);
+
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ ret = pthread_create(&ptid, &attr, wait_attach_timeout, timeout_conf);
+ pthread_attr_destroy(&attr);
+ if (ret != 0) {
+ ERROR("Create attach wait timeout thread failed");
+ free(timeout_conf);
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static int attach_signal_handler(int fd, uint32_t events, void *data,
+ struct lxc_epoll_descr *descr)
+{
+ int ret;
+ siginfo_t info;
+ struct signalfd_siginfo siginfo;
+ pid_t *pid = data;
+
+ ret = lxc_read_nointr(fd, &siginfo, sizeof(siginfo));
+ if (ret < 0)
+ return log_error(LXC_MAINLOOP_ERROR, "Failed to read signal info from signal file descriptor %d", fd);
+
+ if (ret != sizeof(siginfo))
+ return log_error(LXC_MAINLOOP_ERROR, "Unexpected size for struct signalfd_siginfo");
+
+ /* Check whether init is running. */
+ info.si_pid = 0;
+ ret = waitid(P_PID, *pid, &info, WEXITED | WNOWAIT | WNOHANG);
+ if (ret == 0 && info.si_pid == *pid) {
+ return log_warn(LXC_MAINLOOP_CLOSE, "Container attach init process %d exited", *pid);
+ }
+
+ return LXC_MAINLOOP_CONTINUE;
+}
+
+static int isulad_setup_signal_fd(sigset_t *oldmask)
+{
+ int ret;
+ sigset_t mask;
+ const int signals[] = {SIGBUS, SIGILL, SIGSEGV, SIGWINCH, SIGTERM};
+
+ /* Block everything except serious error signals. */
+ ret = sigfillset(&mask);
+ if (ret < 0)
+ return -EBADF;
+
+ for (int sig = 0; sig < (sizeof(signals) / sizeof(signals[0])); sig++) {
+ ret = sigdelset(&mask, signals[sig]);
+ if (ret < 0)
+ return -EBADF;
+ }
+
+ ret = pthread_sigmask(SIG_BLOCK, &mask, oldmask);
+ if (ret < 0)
+ return log_error_errno(-EBADF, errno,
+ "Failed to set signal mask");
+
+ ret = signalfd(-1, &mask, SFD_CLOEXEC);
+ if (ret < 0)
+ return log_error_errno(-EBADF,
+ errno, "Failed to create signal file descriptor");
+
+ TRACE("Created signal file descriptor %d", ret);
+
+ return ret;
+}
+#endif
+
+#ifdef HAVE_ISULAD
+int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
+ void *exec_payload, lxc_attach_options_t *options,
+ pid_t *attached_process, char **err_msg)
+#else
int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
void *exec_payload, lxc_attach_options_t *options,
pid_t *attached_process)
+#endif
{
int ret_parent = -1;
struct lxc_async_descr descr = {};
@@ -1443,6 +1744,17 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
struct attach_context *ctx;
struct lxc_terminal terminal;
struct lxc_conf *conf;
+#ifdef HAVE_ISULAD
+ struct lxc_exec_command_handler exec_command;
+ const char *suffix = options->suffix;
+
+ exec_command.maincmd_fd = -1;
+ exec_command.terminal = &terminal;
+
+ int isulad_sigfd;
+ sigset_t isulad_oldmask;
+ struct lxc_epoll_descr isulad_descr = {0};
+#endif
if (!container)
return ret_errno(EINVAL);
@@ -1472,6 +1784,14 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
conf = ctx->container->lxc_conf;
+#ifdef HAVE_ISULAD
+ // always switch uid and gid for attach
+ if (options->uid == -1)
+ options->uid = conf->init_uid;
+ if (options->gid == -1)
+ options->gid = conf->init_gid;
+#endif
+
if (!fetch_seccomp(ctx->container, options))
WARN("Failed to get seccomp policy");
@@ -1485,13 +1805,23 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
}
if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+#ifdef HAVE_ISULAD
+ ret = lxc_attach_terminal(name, lxcpath, conf, &terminal, options);
+#else
ret = lxc_attach_terminal(name, lxcpath, conf, &terminal);
+#endif
if (ret < 0) {
put_attach_context(ctx);
return syserror("Failed to setup new terminal");
}
terminal.log_fd = options->log_fd;
+#ifdef HAVE_ISULAD
+ if (suffix != NULL) {
+ exec_command.maincmd_fd = lxc_exec_cmd_init(name, lxcpath, suffix);
+ exec_command.terminal = &terminal;
+ }
+#endif
} else {
lxc_terminal_init(&terminal);
}
@@ -1531,10 +1861,38 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
*/
ret = socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
if (ret < 0) {
+#ifdef HAVE_ISULAD
+ if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+ lxc_terminal_delete(&terminal);
+ lxc_terminal_conf_free(&terminal);
+ if (exec_command.maincmd_fd != -1) {
+ close(exec_command.maincmd_fd);
+ }
+ lxc_exec_unix_sock_delete(name, suffix);
+ }
+#endif
put_attach_context(ctx);
return syserror("Could not set up required IPC mechanism for attaching");
}
+#ifdef HAVE_ISULAD
+ /* isulad: pipdfd for get error message of child or grandchild process. */
+ if (pipe2(conf->errpipe, O_CLOEXEC) != 0) {
+ SYSERROR("Failed to init errpipe");
+ if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+ lxc_terminal_delete(&terminal);
+ lxc_terminal_conf_free(&terminal);
+ if (exec_command.maincmd_fd != -1) {
+ close(exec_command.maincmd_fd);
+ }
+ lxc_exec_unix_sock_delete(name, suffix);
+ }
+ close(ipc_sockets[0]);
+ close(ipc_sockets[1]);
+ put_attach_context(ctx);
+ return -1;
+ }
+#endif
/* Create transient process, two reasons:
* 1. We can't setns() in the child itself, since we want to make
* sure we are properly attached to the pidns.
@@ -1544,6 +1902,18 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
*/
pid = fork();
if (pid < 0) {
+#ifdef HAVE_ISULAD
+ if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+ lxc_terminal_delete(&terminal);
+ lxc_terminal_conf_free(&terminal);
+ if (exec_command.maincmd_fd != -1) {
+ close(exec_command.maincmd_fd);
+ }
+ lxc_exec_unix_sock_delete(name, suffix);
+ }
+ close(ipc_sockets[0]);
+ close(ipc_sockets[1]);
+#endif
put_attach_context(ctx);
return syserror("Failed to create first subprocess");
}
@@ -1551,6 +1921,11 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
if (pid == 0) {
char *cwd, *new_cwd;
+#ifdef HAVE_ISULAD
+ /* isulad: close errpipe */
+ close_prot_errno_disarm(conf->errpipe[0]);
+ conf->errpipe[0] = -1;
+#endif
/* close unneeded file descriptors */
close_prot_errno_disarm(ipc_sockets[0]);
@@ -1558,6 +1933,11 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
lxc_attach_terminal_close_ptx(&terminal);
lxc_attach_terminal_close_peer(&terminal);
lxc_attach_terminal_close_log(&terminal);
+#ifdef HAVE_ISULAD
+ if (exec_command.maincmd_fd != -1) {
+ close_prot_errno_disarm(exec_command.maincmd_fd);
+ }
+#endif
}
/* Wait for the parent to have setup cgroups. */
@@ -1622,9 +2002,15 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
.terminal_pts_fd = terminal.pty,
.exec_function = exec_function,
.exec_payload = exec_payload,
+#ifdef HAVE_ISULAD
+ .terminal = &terminal,
+#endif
};
-
+#ifdef HAVE_ISULAD
+ if (options->attach_flags & LXC_ATTACH_TERMINAL && terminal.tty_state) {
+#else
if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+#endif
ret = lxc_terminal_signal_sigmask_safe_blocked(&terminal);
if (ret < 0) {
SYSERROR("Failed to reset signal mask");
@@ -1663,6 +2049,26 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
/* close unneeded file descriptors */
close_prot_errno_disarm(ipc_sockets[1]);
+#ifdef HAVE_ISULAD
+ /* isulad: close errpipe */
+ close_prot_errno_disarm(conf->errpipe[1]);
+ conf->errpipe[1] = -1;
+ /* isulad: close pipe after clone */
+ if (terminal.pipes[0][0] >= 0) {
+ close_prot_errno_disarm(terminal.pipes[0][0]);
+ terminal.pipes[0][0] = -1;
+ }
+
+ if (terminal.pipes[1][1] >= 0) {
+ close_prot_errno_disarm(terminal.pipes[1][1]);
+ terminal.pipes[1][1] = -1;
+ }
+
+ if (terminal.pipes[2][1] >= 0) {
+ close_prot_errno_disarm(terminal.pipes[2][1]);
+ terminal.pipes[2][1] = -1;
+ }
+#endif
put_namespaces(ctx);
if (options->attach_flags & LXC_ATTACH_TERMINAL)
lxc_attach_terminal_close_pts(&terminal);
@@ -1714,9 +2120,28 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
if (ret < 0)
goto on_error;
+#ifdef HAVE_ISULAD
+ ret = lxc_attach_terminal_mainloop_init(&terminal, &isulad_descr);
+ if (ret < 0)
+ goto on_error;
+
+ if (suffix != NULL) {
+ (void)lxc_exec_cmd_mainloop_add(&descr, &exec_command);
+ }
+#endif
TRACE("Initialized terminal mainloop");
}
+#ifdef HAVE_ISULAD
+ /* The signal fd has to be created before forking otherwise if the child
+ * process exits before we setup the signal fd, the event will be lost
+ * and the command will be stuck.
+ */
+ isulad_sigfd = isulad_setup_signal_fd(&isulad_oldmask);
+ if (isulad_sigfd < 0)
+ goto close_mainloop;
+#endif
+
/* Let the child process know to go ahead. */
if (!sync_wake(ipc_sockets[0], ATTACH_SYNC_CGROUP))
goto close_mainloop;
@@ -1783,6 +2208,34 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
*attached_process = attached_pid;
+#ifdef HAVE_ISULAD
+ if (options->timeout > 0) {
+ ret = create_attach_timeout_thread(options->timeout, *attached_process);
+ if (ret) {
+ ERROR("Failed to create attach timeout thread for container.");
+ goto close_mainloop;
+ }
+ }
+ /* isulad: read error msg from pipe */
+ ssize_t size_read;
+ char errbuf[BUFSIZ + 1] = {0};
+ pid_t tmp_pid = *attached_process;
+
+ size_read = read(conf->errpipe[0], errbuf, BUFSIZ);
+ if (size_read > 0) {
+ if (err_msg)
+ *err_msg = safe_strdup(errbuf);
+ goto close_mainloop;
+ }
+ if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+ ret = lxc_mainloop_add_handler(&descr, isulad_sigfd, attach_signal_handler, &tmp_pid);
+ if (ret < 0) {
+ ERROR("Failed to add signal handler for %d to mainloop", tmp_pid);
+ goto close_mainloop;
+ }
+ }
+#endif
+
/* Now shut down communication with child, we're done. */
shutdown(ipc_sockets[0], SHUT_RDWR);
close_prot_errno_disarm(ipc_sockets[0]);
@@ -1790,17 +2243,46 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
ret_parent = 0;
to_cleanup_pid = -1;
+#ifdef HAVE_ISULAD
+ // iSulad: close stdin pipe if we do not want open_stdin with container stdin
+ if (!terminal.open_stdin) {
+ if (terminal.pipes[0][1] > 0) {
+ close_prot_errno_disarm(terminal.pipes[0][1]);
+ terminal.pipes[0][1] = -1;
+ }
+ }
+#endif
+
if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+#ifdef HAVE_ISULAD
+ ret = isulad_safe_mainloop(&descr, -1);
+#else
ret = lxc_mainloop(&descr, -1);
+#endif
if (ret < 0) {
ret_parent = -1;
to_cleanup_pid = attached_pid;
}
}
+#ifdef HAVE_ISULAD
+ // do lxc_mainloop to make sure we do not lose any output
+ (void)isulad_safe_mainloop(&isulad_descr, 100);
+ if (g_attach_timeout_state == ATTACH_TIMEOUT && err_msg != NULL && *err_msg == NULL) {
+ *err_msg = safe_strdup("Attach exceeded timeout");
+ }
+#endif
+
close_mainloop:
+#ifdef HAVE_ISULAD
+ if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+ lxc_mainloop_close(&isulad_descr);
+ lxc_mainloop_close(&descr);
+ }
+#else
if (options->attach_flags & LXC_ATTACH_TERMINAL)
lxc_mainloop_close(&descr);
+#endif
on_error:
if (ipc_sockets[0] >= 0) {
@@ -1814,13 +2296,23 @@ on_error:
if (options->attach_flags & LXC_ATTACH_TERMINAL) {
lxc_terminal_delete(&terminal);
lxc_terminal_conf_free(&terminal);
+#ifdef HAVE_ISULAD
+ if (exec_command.maincmd_fd != -1) {
+ close_prot_errno_disarm(exec_command.maincmd_fd);
+ }
+ lxc_exec_unix_sock_delete(name, suffix);
+#endif
}
put_attach_context(ctx);
return ret_parent;
}
+#ifdef HAVE_ISULAD
+int lxc_attach_run_command(void *payload, int msg_fd)
+#else
int lxc_attach_run_command(void *payload)
+#endif
{
int ret = -1;
lxc_attach_command_t *cmd = payload;
@@ -1838,10 +2330,19 @@ int lxc_attach_run_command(void *payload)
}
}
+#ifdef HAVE_ISULAD
+ /* isulad: write error messages */
+ lxc_write_error_message(msg_fd, "exec: \"%s\": %s.", cmd->program, strerror(errno));
+#endif
+
return syserror_ret(ret, "Failed to exec \"%s\"", cmd->program);
}
+#ifdef HAVE_ISULAD
+int lxc_attach_run_shell(void* payload, int msg_fd)
+#else
int lxc_attach_run_shell(void* payload)
+#endif
{
__do_free char *buf = NULL;
uid_t uid;
diff --git a/src/lxc/attach.h b/src/lxc/attach.h
index c85b84f..7ba0ff8 100644
--- a/src/lxc/attach.h
+++ b/src/lxc/attach.h
@@ -16,9 +16,15 @@
struct lxc_conf;
struct lxc_container;
+#ifdef HAVE_ISULAD
+__hidden extern int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
+ void *exec_payload, lxc_attach_options_t *options,
+ pid_t *attached_process, char **err_msg);
+#else
__hidden extern int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
void *exec_payload, lxc_attach_options_t *options,
pid_t *attached_process);
+#endif
__hidden extern int lxc_attach_remount_sys_proc(void);
diff --git a/src/lxc/attach_options.h b/src/lxc/attach_options.h
index 8187eca..d09dfce 100644
--- a/src/lxc/attach_options.h
+++ b/src/lxc/attach_options.h
@@ -75,7 +75,11 @@ enum {
*
* \return Function should return \c 0 on success, and any other value to denote failure.
*/
+#ifdef HAVE_ISULAD
+typedef int (*lxc_attach_exec_t)(void* payload, int msg_fd);
+#else
typedef int (*lxc_attach_exec_t)(void* payload);
+#endif
typedef struct lxc_groups_t {
size_t size;
@@ -155,6 +159,16 @@ typedef struct lxc_attach_options_t {
* If unset all additional groups are dropped.
*/
lxc_groups_t groups;
+
+#ifdef HAVE_ISULAD
+ char *init_fifo[3]; /* isulad: default fifos for the start */
+ int64_t timeout;/* isulad: Seconds for waiting on a container to attach/exec before it is killed*/
+ const char *suffix;
+ bool disable_pty;
+ bool open_stdin;
+ gid_t *add_gids; /* attach user additional gids */
+ size_t add_gids_len; // iSulad TODO: shoud replace by lxc_groups_t groups;
+#endif
} lxc_attach_options_t;
/*! Default attach options to use */
@@ -175,6 +189,9 @@ typedef struct lxc_attach_options_t {
.log_fd = -EBADF, \
.lsm_label = NULL, \
.groups = {}, \
+#ifdef HAVE_ISULAD
+ /* .init_fifo = */ {NULL, NULL, NULL}, \
+#endif
}
/*!
@@ -192,7 +209,11 @@ typedef struct lxc_attach_command_t {
*
* \return \c -1 on error, exit code of lxc_attach_command_t program on success.
*/
+#ifdef HAVE_ISULAD
+extern int lxc_attach_run_command(void* payload, int msg_fd);
+#else
extern int lxc_attach_run_command(void* payload);
+#endif
/*!
* \brief Run a shell command in the container.
@@ -201,7 +222,11 @@ extern int lxc_attach_run_command(void* payload);
*
* \return Exit code of shell.
*/
+#ifdef HAVE_ISULAD
+extern int lxc_attach_run_shell(void* payload, int msg_fd);
+#else
extern int lxc_attach_run_shell(void* payload);
+#endif
#ifdef __cplusplus
}
diff --git a/src/lxc/cgroups/cgroup.c b/src/lxc/cgroups/cgroup.c
index 5e2a7d0..5de88e3 100644
--- a/src/lxc/cgroups/cgroup.c
+++ b/src/lxc/cgroups/cgroup.c
@@ -32,8 +32,11 @@ struct cgroup_ops *cgroup_init(struct lxc_conf *conf)
cgroup_ops = cgroup_ops_init(conf);
if (!cgroup_ops)
return log_error_errno(NULL, errno, "Failed to initialize cgroup driver");
-
+#ifdef HAVE_ISULAD
+ if (cgroup_ops->data_init(cgroup_ops, conf)) {
+#else
if (cgroup_ops->data_init(cgroup_ops)) {
+#endif
cgroup_exit(cgroup_ops);
return log_error_errno(NULL, errno, "Failed to initialize cgroup data");
}
diff --git a/src/lxc/cgroups/cgroup.h b/src/lxc/cgroups/cgroup.h
index 108e5d8..ebfd3a1 100644
--- a/src/lxc/cgroups/cgroup.h
+++ b/src/lxc/cgroups/cgroup.h
@@ -245,8 +245,15 @@ struct cgroup_ops {
*/
cgroup_layout_t cgroup_layout;
+#ifdef HAVE_ISULAD
+ int (*data_init)(struct cgroup_ops *ops, struct lxc_conf *conf);
+ bool (*payload_destroy)(struct cgroup_ops *ops, struct lxc_handler *handler);
+ // different with get_cgroup(), which return relative path
+ const char *(*get_cgroup_full_path)(struct cgroup_ops *ops, const char *controller);
+#else
int (*data_init)(struct cgroup_ops *ops);
void (*payload_destroy)(struct cgroup_ops *ops, struct lxc_handler *handler);
+#endif
void (*monitor_destroy)(struct cgroup_ops *ops, struct lxc_handler *handler);
bool (*monitor_create)(struct cgroup_ops *ops, struct lxc_handler *handler);
bool (*monitor_enter)(struct cgroup_ops *ops, struct lxc_handler *handler);
diff --git a/src/lxc/conf.c b/src/lxc/conf.c
index 9158713..23783db 100644
--- a/src/lxc/conf.c
+++ b/src/lxc/conf.c
@@ -103,6 +103,12 @@
#include "strchrnul.h"
#endif
+#ifdef HAVE_ISULAD
+#include <pthread.h>
+#include "path.h"
+#include "loop.h"
+#endif
+
lxc_log_define(conf, lxc);
/*
@@ -122,6 +128,11 @@ char *lxchook_names[NUM_LXC_HOOKS] = {
"clone",
"destroy",
"start-host"
+#ifdef HAVE_ISULAD
+ , "oci-prestart",
+ "oci-poststart",
+ "oci-poststop"
+#endif
};
struct mount_opt {
@@ -284,6 +295,21 @@ static struct limit_opt limit_opt[] = {
#endif
};
+#ifdef HAVE_ISULAD
+static int rootfs_parent_mount_private(char *rootfs);
+static int setup_rootfs_ropaths(struct lxc_list *ropaths);
+static int setup_rootfs_maskedpaths(struct lxc_list *maskedpaths);
+static int remount_proc_sys_mount_entries(struct lxc_list *mount_list, bool lsm_aa_allow_nesting);
+static int check_mount_destination(const char *rootfs, const char *dest, const char *src);
+static int mount_entry_with_loop_dev(const char *src, const char *dest, const char *fstype,
+ char *mnt_opts, const char *rootfs);
+static bool need_setup_proc(const struct lxc_conf *conf, struct lxc_list *mount);
+static bool need_setup_dev(const struct lxc_conf *conf, struct lxc_list *mount);
+static int setup_populate_devs(const struct lxc_rootfs *rootfs, struct lxc_list *devs, const char *mount_label);
+static int setup_rootfs_mountopts(const struct lxc_rootfs *rootfs);
+static int create_mtab_link();
+#endif
+
static int run_buffer(char *buffer)
{
__do_free char *output = NULL;
@@ -707,8 +733,13 @@ static int lxc_mount_auto_mounts(struct lxc_handler *handler, int flags)
{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, "%r/proc/sysrq-trigger", "%r/proc/sysrq-trigger", NULL, MS_BIND, NULL, false },
{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, NULL, "%r/proc/sysrq-trigger", NULL, MS_REMOUNT|MS_BIND|MS_RDONLY, NULL, false },
{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_RW, "proc", "%r/proc", "proc", MS_NODEV|MS_NOEXEC|MS_NOSUID, NULL, false },
+#ifdef HAVE_ISULAD
+ { LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RW, "sysfs", "%r/sys", "sysfs", MS_NODEV|MS_NOEXEC|MS_NOSUID, NULL, false },
+ { LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RO, "sysfs", "%r/sys", "sysfs", MS_RDONLY|MS_NODEV|MS_NOEXEC|MS_NOSUID, NULL, false },
+#else
{ LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RW, "sysfs", "%r/sys", "sysfs", 0, NULL, false },
{ LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RO, "sysfs", "%r/sys", "sysfs", MS_RDONLY, NULL, false },
+#endif
/* /proc/sys is used as a temporary staging directory for the read-write sysfs mount and unmounted after binding net */
{ LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED, "sysfs", "%r/proc/sys", "sysfs", MS_NOSUID|MS_NODEV|MS_NOEXEC, NULL, false },
{ LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED, "sysfs", "%r/sys", "sysfs", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC, NULL, false },
@@ -801,11 +832,25 @@ static int lxc_mount_auto_mounts(struct lxc_handler *handler, int flags)
if (!destination)
return syserror_set(-ENOMEM, "Failed to create target path");
+#ifdef HAVE_ISULAD
+ if (mkdir_p(destination, 0755) < 0) {
+ SYSERROR("Failed to create mount target '%s'", destination);
+ return log_error(-1, "Failed to mkdir destination %s", destination);
+ }
+
+ // add selinux label for safe mount
+ ret = safe_mount(source, destination,
+ default_mounts[i].fstype,
+ mflags,
+ default_mounts[i].options,
+ rootfs->path ? rootfs->mount : NULL, NULL);
+#else
ret = safe_mount(source, destination,
default_mounts[i].fstype,
mflags,
default_mounts[i].options,
rootfs->path ? rootfs->mount : NULL);
+#endif
if (ret < 0) {
if (errno != ENOENT)
return syserror("Failed to mount \"%s\" on \"%s\" with flags %lu", source, destination, mflags);
@@ -1210,7 +1255,9 @@ static int lxc_send_ttys_to_parent(struct lxc_handler *handler)
static int mount_autodev(const char *name, const struct lxc_rootfs *rootfs,
int autodevtmpfssize, const char *lxcpath)
{
+#ifndef HAVE_ISULAD
__do_close int fd_fs = -EBADF;
+#endif
const char *path = rootfs->path ? rootfs->mount : NULL;
size_t tmpfs_size = (autodevtmpfssize != 0) ? autodevtmpfssize : 500000;
int ret;
@@ -1227,6 +1274,10 @@ static int mount_autodev(const char *name, const struct lxc_rootfs *rootfs,
goto reset_umask;
}
+#ifdef HAVE_ISULAD
+ if (systemd != NULL && !strcmp(systemd, "true")) {
+ ret = mount(path, path, "", MS_BIND, NULL);
+#else
if (can_use_mount_api()) {
fd_fs = fs_prepare("tmpfs", -EBADF, "", 0, 0);
if (fd_fs < 0)
@@ -1245,6 +1296,7 @@ static int mount_autodev(const char *name, const struct lxc_rootfs *rootfs,
ret = fs_attach(fd_fs, rootfs->dfd_mnt, "dev",
PROTECT_OPATH_DIRECTORY,
PROTECT_LOOKUP_BENEATH_XDEV, 0);
+#endif
} else {
__do_free char *fallback_path = NULL;
@@ -1253,9 +1305,17 @@ static int mount_autodev(const char *name, const struct lxc_rootfs *rootfs,
if (path) {
fallback_path = must_make_path(path, "/dev", NULL);
+#ifdef HAVE_ISULAD
+ ret = safe_mount("none", fallback_path, "tmpfs", 0, mount_options, path, rootfs->lsm_se_mount_context);
+#else
ret = safe_mount("none", fallback_path, "tmpfs", 0, mount_options, path);
+#endif
} else {
+#ifdef HAVE_ISULAD
+ ret = safe_mount("none", "dev", "tmpfs", 0, mount_options, NULL, rootfs->lsm_se_mount_context);
+#else
ret = safe_mount("none", "dev", "tmpfs", 0, mount_options, NULL);
+#endif
}
}
if (ret < 0) {
@@ -1392,7 +1452,11 @@ static int lxc_fill_autodev(struct lxc_rootfs *rootfs)
if (ret < 0)
return log_error(-1, "Failed to create device path for %s", device->name);
+#ifdef HAVE_ISULAD
+ ret = safe_mount(rootfs->buf, path, 0, MS_BIND, NULL, get_rootfs_mnt(rootfs), rootfs->lsm_se_mount_context);
+#else
ret = safe_mount(rootfs->buf, path, 0, MS_BIND, NULL, get_rootfs_mnt(rootfs));
+#endif
if (ret < 0)
return log_error_errno(-1, errno, "Failed to bind mount host device node \"%s\" to \"%s\"", rootfs->buf, path);
@@ -1410,12 +1474,23 @@ static int lxc_fill_autodev(struct lxc_rootfs *rootfs)
static int lxc_mount_rootfs(struct lxc_rootfs *rootfs)
{
int ret;
+#ifdef HAVE_ISULAD
+ unsigned long flags;
+#endif
if (!rootfs->path) {
ret = mount("", "/", NULL, MS_SLAVE | MS_REC, 0);
if (ret < 0)
return log_error_errno(-1, errno, "Failed to recursively turn root mount tree into dependent mount");
+#ifdef HAVE_ISULAD
+ if (!access(rootfs->mount, F_OK)) {
+ rootfs->path = safe_strdup("/");
+ if (mount("/", rootfs->mount, NULL, MS_BIND, 0)) {
+ return log_error_errno(-1, errno, "Failed to mount \"/\" to %s", rootfs->mount);
+ }
+ }
+#endif
rootfs->dfd_mnt = open_at(-EBADF, "/", PROTECT_OPATH_DIRECTORY, PROTECT_LOOKUP_ABSOLUTE, 0);
if (rootfs->dfd_mnt < 0)
return -errno;
@@ -1428,6 +1503,42 @@ static int lxc_mount_rootfs(struct lxc_rootfs *rootfs)
return log_error_errno(-1, errno, "Failed to access to \"%s\". Check it is present",
rootfs->mount);
+#ifdef HAVE_ISULAD
+ // Support mount propagations of rootfs
+ // Get rootfs mnt propagation options, such as slave or shared
+ flags = MS_SLAVE | MS_REC;
+ if (rootfs->mnt_opts.prop_flags)
+ flags = rootfs->mnt_opts.prop_flags;
+
+ /* Mount propagation inside container can not greater than host.
+ * So we must change propagation of root according to flags, default is rslave.
+ * That means shared propagation inside container is disabled by default.
+ */
+ ret = mount("", "/", NULL, flags, NULL);
+ if (ret < 0) {
+ return log_error_errno(-1, errno, "Failed to make / to propagation flags %lu.", flags);
+ }
+
+ /* Make parent mount private to make sure following bind mount does
+ * not propagate in other namespaces. Also it will help with kernel
+ * check pass in pivot_root. (IS_SHARED(new_mnt->mnt_parent))
+ */
+ ret = rootfs_parent_mount_private(rootfs->path);
+ if (ret != 0) {
+ return log_error(-1, "Failed to make parent of rootfs %s to private.", rootfs->path);
+ }
+ ret = rootfs_parent_mount_private(rootfs->mount);
+ if (ret != 0) {
+ return log_error(-1, "Failed to make parent of rootfs %s to private.", rootfs->mount);
+ }
+
+ ret = mount(rootfs->mount, rootfs->mount, "bind", MS_BIND | MS_REC, NULL);
+ if (ret < 0) {
+ SYSERROR("Failed to mount rootfs %s", rootfs->mount);
+ return -1;
+ }
+#endif
+
ret = rootfs->storage->ops->mount(rootfs->storage);
if (ret < 0)
return log_error(-1, "Failed to mount rootfs \"%s\" onto \"%s\" with options \"%s\"",
@@ -1780,7 +1891,11 @@ static int lxc_setup_devpts_child(struct lxc_handler *handler)
DEBUG("Attached detached devpts mount %d to %d/pts", devpts_fd, rootfs->dfd_dev);
} else {
char **opts;
+#ifdef HAVE_ISULAD
+ __do_free char *devpts_mntopts = NULL;
+#else
char devpts_mntopts[256];
+#endif
char *mntopt_sets[5];
char default_devpts_mntopts[256] = "gid=5,newinstance,ptmxmode=0666,mode=0620";
@@ -1788,9 +1903,18 @@ static int lxc_setup_devpts_child(struct lxc_handler *handler)
* Fallback codepath in case the new mount API can't be used to
* create detached mounts.
*/
-
+#ifdef HAVE_ISULAD
+ if (rootfs->lsm_se_mount_context != NULL) {
+ ret = strnprintf(devpts_mntopts, sizeof(devpts_mntopts), "%s,max=%zu,context=\"%s\"",
+ default_devpts_mntopts, pty_max, rootfs->lsm_se_mount_context);
+ } else {
+#else
ret = strnprintf(devpts_mntopts, sizeof(devpts_mntopts), "%s,max=%zu",
default_devpts_mntopts, pty_max);
+#endif
+#ifdef HAVE_ISULAD
+ }
+#endif
if (ret < 0)
return -1;
@@ -1951,6 +2075,15 @@ static int bind_mount_console(int fd_devpts, struct lxc_rootfs *rootfs,
struct lxc_terminal *console, int fd_to)
{
__do_close int fd_pty = -EBADF;
+#ifdef HAVE_ISULAD
+ __do_free char *mnt_opts = NULL;
+
+ if (rootfs->lsm_se_mount_context != NULL) {
+ if (asprintf(mnt_opts, "context=\"%s\"", rootfs->lsm_se_mount_context) < 0) {
+ return syserror("Out of memory");
+ }
+ }
+#endif
if (is_empty_string(console->name))
return ret_errno(EINVAL);
@@ -1981,7 +2114,11 @@ static int bind_mount_console(int fd_devpts, struct lxc_rootfs *rootfs,
if (can_use_mount_api())
return fd_bind_mount(fd_pty, "", 0, 0, fd_to, "", 0, 0, 0, 0, 0, false);
+#ifdef HAVE_ISULAD
+ return mount_fd(fd_pty, fd_to, "none", MS_BIND, mnt_opts);
+#else
return mount_fd(fd_pty, fd_to, "none", MS_BIND, 0);
+#endif
}
static int lxc_setup_dev_console(int fd_devpts, struct lxc_rootfs *rootfs,
@@ -2040,6 +2177,15 @@ static int lxc_setup_ttydir_console(int fd_devpts, struct lxc_rootfs *rootfs,
__do_close int fd_ttydir = -EBADF, fd_dev_console = -EBADF,
fd_reg_console = -EBADF, fd_reg_ttydir_console = -EBADF;
int ret;
+#ifdef HAVE_ISULAD
+ __do_free char *mnt_opts = NULL;
+
+ if (rootfs->lsm_se_mount_context != NULL) {
+ if (asprintf(mnt_opts, "context=\"%s\"", rootfs->lsm_se_mount_context) < 0) {
+ return syserror("Out of memory");
+ }
+ }
+#endif
/* create dev/<ttydir> */
ret = mkdirat(rootfs->dfd_dev, ttydir, 0755);
@@ -2124,7 +2270,11 @@ static int lxc_setup_ttydir_console(int fd_devpts, struct lxc_rootfs *rootfs,
0,
false);
else
+#ifdef HAVE_ISULAD
+ ret = mount_fd(fd_dev_console, fd_reg_console, "none", MS_BIND, mnt_opts);
+#else
ret = mount_fd(fd_dev_console, fd_reg_console, "none", MS_BIND, 0);
+#endif
if (ret < 0)
return syserror("Failed to mount \"%d\" on \"%d\"",
fd_dev_console, fd_reg_console);
@@ -2410,10 +2560,17 @@ static char *get_field(char *src, int nfields)
return p;
}
+#ifdef HAVE_ISULAD
+static int mount_entry(const char *fsname, const char *target,
+ const char *fstype, unsigned long mountflags,
+ unsigned long pflags, const char *data, bool optional,
+ bool dev, bool relative, const char *rootfs, const char *mount_label)
+#else
static int mount_entry(const char *fsname, const char *target,
const char *fstype, unsigned long mountflags,
unsigned long pflags, const char *data, bool optional,
bool dev, bool relative, const char *rootfs)
+#endif
{
int ret;
char srcbuf[PATH_MAX];
@@ -2428,9 +2585,13 @@ static int mount_entry(const char *fsname, const char *target,
return log_error_errno(-1, errno, "source path is too long");
srcpath = srcbuf;
}
-
+#ifdef HAVE_ISULAD
+ ret = safe_mount(srcpath, target, fstype, mountflags & ~MS_REMOUNT, data,
+ rootfs, mount_label);
+#else
ret = safe_mount(srcpath, target, fstype, mountflags & ~MS_REMOUNT, data,
rootfs);
+#endif
if (ret < 0) {
if (optional)
return log_info_errno(0, errno, "Failed to mount \"%s\" on \"%s\" (optional)",
@@ -2639,6 +2800,10 @@ static inline int mount_entry_on_generic(struct mntent *mntent,
int ret;
bool dev, optional, relative;
struct lxc_mount_options opts = {};
+#ifdef HAVE_ISULAD
+ const char *dest = path;
+ __do_free char *rpath = NULL;
+#endif
optional = hasmntopt(mntent, "optional") != NULL;
dev = hasmntopt(mntent, "dev") != NULL;
@@ -2647,8 +2812,31 @@ static inline int mount_entry_on_generic(struct mntent *mntent,
if (rootfs && rootfs->path)
rootfs_path = rootfs->mount;
+#ifdef HAVE_ISULAD
+ // isulad: ensure that the destination of the bind mount is resolved of symlinks at mount time because
+ // any previous mounts can invalidate the next mount's destination.
+ // this can happen when a user specifies mounts within other mounts to cause breakouts or other
+ // evil stuff to try to escape the container's rootfs.
+ if (rootfs_path) {
+ rpath = follow_symlink_in_scope(path, rootfs_path);
+ if (!rpath) {
+ ERROR("Failed to get real path of '%s' in scope '%s'.", path, rootfs_path);
+ return -1;
+ }
+ dest = rpath;
+
+ ret = check_mount_destination(rootfs_path, dest, mntent->mnt_fsname);
+ if (ret) {
+ ERROR("Mount destination is invalid: '%s'", dest);
+ return -1;
+ }
+ }
+ ret = mount_entry_create_dir_file(mntent, dest, rootfs, lxc_name,
+ lxc_path);
+#else
ret = mount_entry_create_dir_file(mntent, path, rootfs, lxc_name,
lxc_path);
+#endif
if (ret < 0) {
if (optional)
return 0;
@@ -2673,7 +2861,24 @@ static inline int mount_entry_on_generic(struct mntent *mntent,
ret = parse_mount_attrs(&opts, mntent->mnt_opts);
if (ret < 0)
return -1;
-
+#ifdef HAVE_ISULAD
+ // support squashfs
+ if (strcmp(mntent->mnt_type, "squashfs") == 0) {
+ ret = mount_entry_with_loop_dev(mntent->mnt_fsname, dest, mntent->mnt_type,
+ mntent->mnt_opts, rootfs_path);
+ } else {
+ ret = mount_entry(mntent->mnt_fsname,
+ dest,
+ mntent->mnt_type,
+ opts.mnt_flags,
+ opts.prop_flags,
+ opts.data,
+ optional,
+ dev,
+ relative,
+ rootfs_path, rootfs != NULL ? rootfs->lsm_se_mount_context : NULL);
+ }
+#else
ret = mount_entry(mntent->mnt_fsname,
path,
mntent->mnt_type,
@@ -2684,6 +2889,7 @@ static inline int mount_entry_on_generic(struct mntent *mntent,
dev,
relative,
rootfs_path);
+#endif
return ret;
}
@@ -2771,6 +2977,27 @@ static int mount_file_entries(struct lxc_rootfs *rootfs, FILE *file,
while (getmntent_r(file, &mntent, buf, sizeof(buf))) {
int ret;
+#ifdef HAVE_ISULAD
+ //isulad, system contaienr, skip "proc/sys/xxx" path
+ if (conf->systemd != NULL && strcmp(conf->systemd, "true") == 0) {
+ if (strstr(mntent.mnt_dir, "proc/sys") != NULL) {
+ continue;
+ }
+ }
+
+ /* Note: Workaround for volume file path with space*/
+ mntent.mnt_fsname = lxc_string_replace(SPACE_MAGIC_STR, " ", mntent.mnt_fsname);
+ if(!mntent.mnt_fsname) {
+ SYSERROR("memory allocation error");
+ return -1;
+ }
+ mntent.mnt_dir = lxc_string_replace(SPACE_MAGIC_STR, " ", mntent.mnt_dir);
+ if(!mntent.mnt_dir) {
+ SYSERROR("memory allocation error");
+ free(mntent.mnt_fsname);
+ return -1;
+ }
+#endif
if (!rootfs->path)
ret = mount_entry_on_systemfs(rootfs, &mntent);
else if (mntent.mnt_dir[0] != '/')
@@ -2779,6 +3006,12 @@ static int mount_file_entries(struct lxc_rootfs *rootfs, FILE *file,
else
ret = mount_entry_on_absolute_rootfs(&mntent, rootfs,
lxc_name, lxc_path);
+#ifdef HAVE_ISULAD
+ free(mntent.mnt_fsname);
+ mntent.mnt_fsname = NULL;
+ free(mntent.mnt_dir);
+ mntent.mnt_dir = NULL;
+#endif
if (ret < 0)
return -1;
}
@@ -3255,6 +3488,17 @@ static int capabilities_allow(struct lxc_conf *conf)
if (cap->cap > last_cap)
continue;
+#ifdef HAVE_ISULAD
+ /* Do not keep any cap*/
+ if (strcmp(cap->cap_name, "ISULAD_KEEP_NONE") == 0) {
+ DEBUG("Do not keep any capability");
+ __u32 i;
+ for(i = 0; i < nr_u32; i++) {
+ keep_bits[i] = 0;
+ }
+ break;
+ }
+#endif
set_bit(cap->cap, keep_bits);
DEBUG("Keeping %s (%d) capability", cap->cap_name, cap->cap);
}
@@ -3473,6 +3717,27 @@ struct lxc_conf *lxc_conf_init(void)
INIT_LIST_HEAD(&new->netdevs);
+#ifdef HAVE_ISULAD
+ lxc_list_init(&new->populate_devs);
+ lxc_list_init(&new->rootfs.maskedpaths);
+ lxc_list_init(&new->rootfs.ropaths);
+ new->exit_fd = -1;
+ new->umask = 0027; /*default umask 0027*/
+ new->console.init_fifo[0] = NULL;
+ new->console.init_fifo[1] = NULL;
+ new->console.init_fifo[2] = NULL;
+ new->console.pipes[0][0] = -1;
+ new->console.pipes[0][1] = -1;
+ new->console.pipes[1][0] = -1;
+ new->console.pipes[1][1] = -1;
+ new->console.pipes[2][0] = -1;
+ new->console.pipes[2][1] = -1;
+ lxc_list_init(&new->console.fifos);
+ new->errmsg = NULL;
+ new->errpipe[0] = -1;
+ new->errpipe[1] = -1;
+#endif
+
return new;
}
@@ -3945,7 +4210,11 @@ static void turn_into_dependent_mounts(const struct lxc_rootfs *rootfs)
null_endofword(target);
ret = mount(NULL, target, NULL, MS_SLAVE, NULL);
if (ret < 0) {
+#ifdef HAVE_ISULAD
+ SYSERROR("Failed to recursively turn old root mount tree: %s into dependent mount. Continuing...", target);
+#else
SYSERROR("Failed to recursively turn old root mount tree into dependent mount. Continuing...");
+#endif
continue;
}
}
@@ -3964,6 +4233,10 @@ int lxc_setup_rootfs_prepare_root(struct lxc_conf *conf, const char *name,
if (conf->rootfs.dfd_host < 0)
return log_error_errno(-errno, errno, "Failed to open \"/\"");
+#ifdef HAVE_ISULAD
+ // iSulad: will remount all mounts when we setted propagation flags
+ if (conf->rootfs.mnt_opts.prop_flags == 0)
+#endif
turn_into_dependent_mounts(&conf->rootfs);
if (conf->rootfs_setup) {
@@ -4358,10 +4631,22 @@ int lxc_setup(struct lxc_handler *handler)
int ret;
const char *lxcpath = handler->lxcpath, *name = handler->name;
struct lxc_conf *lxc_conf = handler->conf;
+#ifdef HAVE_ISULAD
+ bool setup_dev = true;
+ bool setup_proc = true;
+#endif
ret = lxc_rootfs_prepare_child(handler);
if (ret < 0)
+#ifdef HAVE_ISULAD
+ {
+ lxc_write_error_message(lxc_conf->errpipe[1], "%s:%d: failed to setup rootfs %s.",
+ __FILE__, __LINE__, lxc_conf->rootfs.path);
+ return syserror("Failed to prepare rootfs");
+ }
+#else
return syserror("Failed to prepare rootfs");
+#endif
ret = lxc_setup_rootfs_prepare_root(lxc_conf, name, lxcpath);
if (ret < 0)
@@ -4402,6 +4687,16 @@ int lxc_setup(struct lxc_handler *handler)
if (ret < 0)
return log_error(-1, "Failed to setup first automatic mounts");
+#ifdef HAVE_ISULAD
+ /* Now mount only cgroups, if wanted. Before, /sys could not have been
+ * mounted. It is guaranteed to be mounted now either through
+ * automatically or via fstab entries.
+ */
+ ret = lxc_mount_auto_mounts(handler, lxc_conf->auto_mounts & LXC_AUTO_CGROUP_MASK);
+ if (ret < 0)
+ return log_error(-1, "Failed to setup remaining automatic mounts");
+#endif
+
ret = setup_mount_fstab(&lxc_conf->rootfs, lxc_conf->fstab, name, lxcpath);
if (ret < 0)
return log_error(-1, "Failed to setup mounts");
@@ -4410,6 +4705,10 @@ int lxc_setup(struct lxc_handler *handler)
ret = setup_mount_entries(lxc_conf, &lxc_conf->rootfs, name, lxcpath);
if (ret < 0)
return log_error(-1, "Failed to setup mount entries");
+#ifdef HAVE_ISULAD
+ setup_dev = need_setup_dev(lxc_conf, &lxc_conf->mount_entries);
+ setup_proc = need_setup_proc(lxc_conf, &lxc_conf->mount_entries);
+#endif
}
if (!lxc_sync_wake_parent(handler, START_SYNC_IDMAPPED_MOUNTS))
@@ -4424,6 +4723,7 @@ int lxc_setup(struct lxc_handler *handler)
if (lxc_conf->rootfs.dfd_dev < 0 && errno != ENOENT)
return log_error_errno(-errno, errno, "Failed to open \"/dev\"");
+#ifndef HAVE_ISULAD
/* Now mount only cgroups, if wanted. Before, /sys could not have been
* mounted. It is guaranteed to be mounted now either through
* automatically or via fstab entries.
@@ -4431,6 +4731,7 @@ int lxc_setup(struct lxc_handler *handler)
ret = lxc_mount_auto_mounts(handler, lxc_conf->auto_mounts & LXC_AUTO_CGROUP_MASK);
if (ret < 0)
return log_error(-1, "Failed to setup remaining automatic mounts");
+#endif
ret = run_lxc_hooks(name, "mount", lxc_conf, NULL);
if (ret < 0)
@@ -4453,13 +4754,28 @@ int lxc_setup(struct lxc_handler *handler)
if (!verify_start_hooks(lxc_conf))
return log_error(-1, "Failed to verify start hooks");
+#ifdef HAVE_ISULAD
+ if (setup_proc)
+#endif
ret = lxc_create_tmp_proc_mount(lxc_conf);
if (ret < 0)
return log_error(-1, "Failed to mount transient procfs instance for LSMs");
+#ifdef HAVE_ISULAD
+ if (setup_rootfs_mountopts(&lxc_conf->rootfs)) {
+ return log_error(-1, "failed to set rootfs for '%s'", name);
+ }
+ if (lxc_conf->rootfs.path != NULL && setup_dev) {
+ ret = lxc_setup_devpts_child(handler);
+ if (ret < 0) {
+ return log_error(-1, "Failed to setup new devpts instance for '%s'", name);
+ }
+ }
+#else
ret = lxc_setup_devpts_child(handler);
if (ret < 0)
return log_error(-1, "Failed to prepare new devpts instance");
+#endif
ret = lxc_finish_devpts_child(handler);
if (ret < 0)
@@ -4478,6 +4794,12 @@ int lxc_setup(struct lxc_handler *handler)
if (ret < 0)
return log_error(-1, "Failed to setup \"/dev\" symlinks");
+#ifdef HAVE_ISULAD
+ /* Ask father to run oci prestart hooks and wait for him to finish. */
+ if (lxc_sync_barrier_parent(handler, LXC_SYNC_OCI_PRESTART_HOOK)) {
+ return log_error(-1, "Failed to sync parent to start host hook");
+ }
+#endif
ret = lxc_setup_rootfs_switch_root(&lxc_conf->rootfs);
if (ret < 0)
return log_error(-1, "Failed to pivot root into rootfs");
@@ -4491,6 +4813,11 @@ int lxc_setup(struct lxc_handler *handler)
if (lxc_conf->autodev > 0)
(void)lxc_setup_boot_id();
+#ifdef HAVE_ISULAD
+ /*isulad: set system umask */
+ umask(lxc_conf->umask);
+#endif
+
ret = setup_personality(lxc_conf->personality);
if (ret < 0)
return syserror("Failed to set personality");
@@ -4503,6 +4830,37 @@ int lxc_setup(struct lxc_handler *handler)
if (ret < 0)
return log_error(-1, "Failed to setup sysctl parameters");
+#ifdef HAVE_ISULAD
+ // isulad: setup rootfs ro paths
+ if (!lxc_list_empty(&lxc_conf->rootfs.ropaths)) {
+ if (setup_rootfs_ropaths(&lxc_conf->rootfs.ropaths)) {
+ return log_error(-1, "failed to setup readonlypaths");
+ }
+ }
+
+ // isulad: setup rootfs masked paths
+ if (!lxc_list_empty(&lxc_conf->rootfs.maskedpaths)) {
+ if (setup_rootfs_maskedpaths(&lxc_conf->rootfs.maskedpaths)) {
+ return log_error(-1, "failed to setup maskedpaths");
+ }
+ }
+
+ //isulad: system container, remount /proc/sys/xxx by mount_list
+ if (lxc_conf->systemd != NULL && strcmp(lxc_conf->systemd, "true") == 0) {
+ if (!lxc_list_empty(&lxc_conf->mount_list)) {
+ if (remount_proc_sys_mount_entries(&lxc_conf->mount_list,
+ lxc_conf->lsm_aa_allow_nesting)) {
+ return log_error(-1, "failed to remount /proc/sys");
+ }
+ }
+ }
+
+ // isulad: create link /etc/mtab for /proc/mounts
+ if (create_mtab_link() != 0) {
+ return log_error(-1, "failed to create link /etc/mtab for target /proc/mounts");
+ }
+#endif
+
ret = setup_capabilities(lxc_conf);
if (ret < 0)
return log_error(-1, "Failed to setup capabilities");
@@ -4876,6 +5234,27 @@ void lxc_conf_free(struct lxc_conf *conf)
free(conf->cgroup_meta.systemd_scope);
free(conf->shmount.path_host);
free(conf->shmount.path_cont);
+
+#ifdef HAVE_ISULAD
+ free(conf->container_info_file);
+ if (conf->exit_fd != -1) {
+ close(conf->exit_fd);
+ }
+ free(conf->systemd);
+ lxc_clear_init_args(conf);
+ lxc_clear_init_groups(conf);
+ lxc_clear_populate_devices(conf);
+ lxc_clear_rootfs_masked_paths(conf);
+ lxc_clear_rootfs_ro_paths(conf);
+ free(conf->errmsg);
+ lxc_close_error_pipe(conf->errpipe);
+ if (conf->ocihooks) {
+ free_oci_runtime_spec_hooks(conf->ocihooks);
+ }
+ free(conf->lsm_se_mount_context);
+ free(conf->lsm_se_keyring_context);
+#endif
+
free(conf);
}
@@ -5798,3 +6177,1321 @@ int lxc_set_environment(const struct lxc_conf *conf)
return 0;
}
+
+#ifdef HAVE_ISULAD
+/* isulad drop caps for container*/
+int lxc_drop_caps(struct lxc_conf *conf)
+{
+#define __DEF_CAP_TO_MASK(x) (1U << ((x) & 31))
+#if HAVE_LIBCAP
+ int ret = 0;
+ struct lxc_list *iterator = NULL;
+ char *keep_entry = NULL;
+ size_t i = 0;
+ int capid;
+ size_t numcaps = (size_t)lxc_caps_last_cap() + 1;
+ struct lxc_list *caps = NULL;
+ int *caplist = NULL;
+
+ if (lxc_list_empty(&conf->keepcaps))
+ return 0;
+
+ caps = &conf->keepcaps;
+
+ if (numcaps <= 0 || numcaps > 200)
+ return -1;
+
+ // caplist[i] is 1 if we keep capability i
+ caplist = malloc(numcaps * sizeof(int));
+ if (caplist == NULL) {
+ ERROR("Out of memory");
+ return -1;
+ }
+ (void)memset(caplist, 0, numcaps * sizeof(int));
+
+ lxc_list_for_each(iterator, caps) {
+
+ keep_entry = iterator->elem;
+ /* isulad: Do not keep any cap*/
+ if (strcmp(keep_entry, "ISULAD_KEEP_NONE") == 0) {
+ DEBUG("Do not keep any capability");
+ for(i = 0; i < numcaps; i++) {
+ caplist[i] = 0;
+ }
+ break;
+ }
+
+ capid = parse_cap(keep_entry);
+
+ if (capid == -2)
+ continue;
+
+ if (capid < 0) {
+ ERROR("unknown capability %s", keep_entry);
+ ret = -1;
+ goto out;
+ }
+
+ DEBUG("keep capability '%s' (%d)", keep_entry, capid);
+
+ caplist[capid] = 1;
+ }
+
+ struct __user_cap_header_struct cap_header_data;
+ struct __user_cap_data_struct cap_data_data[2];
+
+ cap_user_header_t cap_header = &cap_header_data;
+ cap_user_data_t cap_data = &cap_data_data[0];
+
+ memset(cap_header, 0,sizeof(struct __user_cap_header_struct));
+ memset(cap_data, 0, sizeof(struct __user_cap_data_struct) * 2);
+
+ cap_header->pid = 0;
+ cap_header->version = _LINUX_CAPABILITY_VERSION_3;
+
+ for (i = 0; i < numcaps; i++) {
+ if (caplist[i]) {
+ cap_data[CAP_TO_INDEX(i)].effective = cap_data[CAP_TO_INDEX(i)].effective | (i > 31 ? __DEF_CAP_TO_MASK(i % 32) : __DEF_CAP_TO_MASK(i));
+ cap_data[CAP_TO_INDEX(i)].permitted = cap_data[CAP_TO_INDEX(i)].permitted | (i > 31 ? __DEF_CAP_TO_MASK(i % 32) : __DEF_CAP_TO_MASK(i));
+ // fix CVE-2022-24769
+ // inheritable capability should be empty
+ }
+ }
+
+ if (capset(cap_header, cap_data)) {
+ SYSERROR("Failed to set capabilitys");
+ ret = -1;
+ goto out;
+ }
+
+out:
+ free(caplist);
+ return ret;
+#else
+ return 0;
+#endif
+}
+
+static bool have_dev_bind_mount_entry(FILE *file)
+{
+ bool have_bind_dev = false;
+ char buf[PATH_MAX];
+ struct mntent mntent;
+
+ while (getmntent_r(file, &mntent, buf, sizeof(buf))) {
+ mntent.mnt_dir = lxc_string_replace(SPACE_MAGIC_STR, " ", mntent.mnt_dir);
+ if(!mntent.mnt_dir) {
+ SYSERROR("memory allocation error");
+ continue;
+ }
+
+ if (strcmp(mntent.mnt_dir, "dev") == 0 && strcmp(mntent.mnt_type, "bind") == 0) {
+ have_bind_dev = true;
+ }
+
+ free(mntent.mnt_dir);
+ mntent.mnt_dir = NULL;
+
+ if (have_bind_dev)
+ return true;
+ }
+
+ return false;
+}
+
+// returns true if /dev needs to be set up.
+static bool need_setup_dev(const struct lxc_conf *conf, struct lxc_list *mount)
+{
+ __do_fclose FILE *f = NULL;
+
+ f = make_anonymous_mount_file(mount, conf->lsm_aa_allow_nesting);
+ if (!f)
+ return true;
+
+ if (have_dev_bind_mount_entry(f)) {
+ return false;
+ } else {
+ return true;
+ }
+}
+
+static bool have_proc_bind_mount_entry(FILE *file)
+{
+ bool have_bind_proc = false;
+ char buf[PATH_MAX] = { 0 };
+ struct mntent mntent;
+
+ while (getmntent_r(file, &mntent, buf, sizeof(buf))) {
+ mntent.mnt_dir = lxc_string_replace(SPACE_MAGIC_STR, " ", mntent.mnt_dir);
+ if(mntent.mnt_dir == NULL) {
+ SYSERROR("memory allocation error");
+ continue;
+ }
+
+ DEBUG("parsed mnt %s, %s, %s", mntent.mnt_fsname, mntent.mnt_dir, mntent.mnt_type);
+
+ if (strcmp(mntent.mnt_dir, "proc") == 0 && strcmp(mntent.mnt_type, "bind") == 0) {
+ have_bind_proc = true;
+ }
+
+ free(mntent.mnt_dir);
+ mntent.mnt_dir = NULL;
+
+ if (have_bind_proc)
+ return true;
+ }
+
+ return false;
+}
+
+// returns true if /proc needs to be set up.
+static bool need_setup_proc(const struct lxc_conf *conf, struct lxc_list *mount)
+{
+ __do_fclose FILE *f = NULL;
+
+ f = make_anonymous_mount_file(mount, conf->lsm_aa_allow_nesting);
+ if (f == NULL)
+ return true;
+
+ if (have_proc_bind_mount_entry(f)) {
+ return false;
+ } else {
+ return true;
+ }
+}
+
+static int mount_entry_with_loop_dev(const char *src, const char *dest, const char *fstype,
+ char *mnt_opts, const char *rootfs)
+{
+ int srcfd = -1, destfd, ret, saved_errno;
+ char srcbuf[50], destbuf[50]; // only needs enough for /proc/self/fd/<fd>
+ const char *mntsrc = src;
+ int max_retry = 5;
+ struct lxc_storage loop;
+
+ if (!rootfs)
+ rootfs = "";
+
+ /* todo - allow symlinks for relative paths if 'allowsymlinks' option is passed */
+ if (src && src[0] != '/') {
+ INFO("this is a relative mount");
+ srcfd = open_without_symlink(src, NULL);
+ if (srcfd < 0)
+ return srcfd;
+ ret = snprintf(srcbuf, sizeof(srcbuf), "/proc/self/fd/%d", srcfd);
+ if (ret < 0 || ret > sizeof(srcbuf)) {
+ close(srcfd);
+ ERROR("Failed to print string");
+ return -EINVAL;
+ }
+ mntsrc = srcbuf;
+ }
+
+ destfd = open_without_symlink(dest, rootfs);
+ if (destfd < 0) {
+ if (srcfd != -1) {
+ saved_errno = errno;
+ close(srcfd);
+ errno = saved_errno;
+ }
+ return destfd;
+ }
+
+ ret = snprintf(destbuf, sizeof(destbuf), "/proc/self/fd/%d", destfd);
+ if (ret < 0 || ret > sizeof(destbuf)) {
+ if (srcfd != -1)
+ close(srcfd);
+ close(destfd);
+ ERROR("Out of memory");
+ return -EINVAL;
+ }
+
+retry:
+ loop.src = (char *)mntsrc;
+ loop.dest = destbuf;
+ loop.mntopts = mnt_opts;
+ loop.type = "loop";
+ loop.lofd = -1;
+ ret = loop_mount(&loop);
+ if (ret < 0) {
+ /* If loop is used by other program, mount may fail. So
+ * we do retry to ensure mount ok */
+ if (max_retry > 0) {
+ max_retry--;
+ DEBUG("mount entry with loop dev failed, retry mount."
+ "retry count left %d", max_retry);
+ goto retry;
+ }
+ }
+ if (loop.lofd != -1)
+ close(loop.lofd);
+ if (srcfd != -1)
+ close(srcfd);
+ close(destfd);
+ if (ret < 0) {
+ SYSERROR("Failed to mount %s onto %s", src, dest);
+ return ret;
+ }
+
+ return 0;
+}
+
+/* isulad: checkMountDestination checks to ensure that the mount destination is not over the top of /proc.
+ * dest is required to be an abs path and have any symlinks resolved before calling this function. */
+static int check_mount_destination(const char *rootfs, const char *dest, const char *src)
+{
+ const char *invalid_destinations[] = {
+ "/proc",
+ NULL
+ };
+ // White list, it should be sub directories of invalid destinations
+ const char *valid_destinations[] = {
+ // These entries can be bind mounted by files emulated by fuse,
+ // so commands like top, free displays stats in container.
+ "/proc/cpuinfo",
+ "/proc/diskstats",
+ "/proc/meminfo",
+ "/proc/stat",
+ "/proc/swaps",
+ "/proc/uptime",
+ "/proc/net/dev",
+ NULL
+ };
+ const char **valid = NULL;
+ const char **invalid = NULL;
+
+ for(valid = valid_destinations; *valid != NULL; valid++) {
+ __do_free char *fullpath = NULL;
+ __do_free char *relpath = NULL;
+ const char *parts[3] = {
+ rootfs,
+ *valid,
+ NULL
+ };
+ fullpath = lxc_string_join("/", parts, false);
+ if (fullpath == NULL) {
+ ERROR("Out of memory");
+ return -1;
+ }
+ relpath = path_relative(fullpath, dest);
+ if (relpath == NULL) {
+ ERROR("Failed to get relpath for %s related to %s", dest, fullpath);
+ return -1;
+ }
+ if (!strcmp(relpath, ".")) {
+ return 0;
+ }
+ }
+
+ for(invalid = invalid_destinations; *invalid != NULL; invalid++) {
+ __do_free char *fullpath = NULL;
+ __do_free char *relpath = NULL;
+ const char *parts[3] = {
+ rootfs,
+ *invalid,
+ NULL
+ };
+ fullpath = lxc_string_join("/", parts, false);
+ if (fullpath == NULL) {
+ ERROR("Out of memory");
+ return -1;
+ }
+ relpath = path_relative(fullpath, dest);
+ DEBUG("dst path %s get relative path %s with full path %s,src:%s", dest, relpath, fullpath, src);
+ if (relpath == NULL) {
+ ERROR("Failed to get relpath for %s related to %s", dest, fullpath);
+ return -1;
+ }
+ // pass if the mount path is outside of invalid proc
+ if (strncmp(relpath, "..", 2) == 0) {
+ continue;
+ }
+ if (strcmp(relpath, ".") == 0) {
+ if (src == NULL) {
+ continue;
+ }
+ // pass if the mount on top of /proc and the source of the mount is a proc filesystem
+ if (has_fs_type(src, PROC_SUPER_MAGIC)) {
+ WARN("src %s is proc allow mount on-top of %s", src, *invalid);
+ continue;
+ }
+ ERROR("%s cannot be mounted because it is located inside %s", dest, *invalid);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+// maskPath masks the top of the specified path inside a container to avoid
+// security issues from processes reading information from non-namespace aware
+// mounts ( proc/kcore ).
+static bool mask_path(const char *path)
+{
+ int ret;
+
+ if (!path)
+ return true;
+
+ ret = mount("/dev/null", path, "", MS_BIND, "");
+ if (ret < 0 && errno != ENOENT) {
+ if (errno == ENOTDIR) {
+ ret = mount("tmpfs", path, "tmpfs", MS_RDONLY, "");
+ if (ret < 0)
+ goto error;
+ return true;
+ }
+ goto error;
+ }
+ return true;
+
+error:
+ SYSERROR("Failed to mask path \"%s\": %s", path, strerror(errno));
+ return false;
+}
+
+static bool remount_readwrite(const char *path)
+{
+ int ret, i;
+
+ if (!path)
+ return true;
+
+ for (i = 0; i < 5; i++) {
+ ret = mount("", path, "", MS_REMOUNT, "");
+ if (ret < 0 && errno != ENOENT) {
+ if (errno == EINVAL) {
+ // Probably not a mountpoint, use bind-mount
+ ret = mount(path, path, "", MS_BIND, "");
+ if (ret < 0)
+ goto on_error;
+ ret = mount(path, path, "", MS_BIND | MS_REMOUNT | MS_REC | \
+ MS_NOEXEC | MS_NOSUID | MS_NODEV, "");
+ if (ret < 0)
+ goto on_error;
+ } else if (errno == EBUSY) {
+ DEBUG("Try to mount \"%s\" to readonly after 100ms.", path);
+ usleep(100 * 1000);
+ continue;
+ } else {
+ goto on_error;
+ }
+ }
+ return true;
+ }
+
+on_error:
+ SYSERROR("Unable to mount \"%s\" to readwrite", path);
+ return false;
+}
+
+static int remount_proc_sys_mount_entries(struct lxc_list *mount_list, bool lsm_aa_allow_nesting)
+{
+ char buf[4096];
+ FILE *file;
+ struct mntent mntent;
+
+ file = make_anonymous_mount_file(mount_list, lsm_aa_allow_nesting);
+ if (!file)
+ return -1;
+
+ while (getmntent_r(file, &mntent, buf, sizeof(buf))) {
+ if (strstr(mntent.mnt_dir, "proc/sys") == NULL) {
+ continue;
+ }
+
+ if (!remount_readwrite((const char*)mntent.mnt_dir)) {
+ fclose(file);
+ return -1;
+ }
+ }
+
+ fclose(file);
+ return 0;
+}
+
+// remount_readonly will bind over the top of an existing path and ensure that it is read-only.
+static bool remount_readonly(const char *path)
+{
+ int ret, i;
+
+ if (!path)
+ return true;
+
+ for (i = 0; i < 5; i++) {
+ ret = mount("", path, "", MS_REMOUNT | MS_RDONLY, "");
+ if (ret < 0 && errno != ENOENT) {
+ if (errno == EINVAL) {
+ // Probably not a mountpoint, use bind-mount
+ ret = mount(path, path, "", MS_BIND, "");
+ if (ret < 0)
+ goto on_error;
+ ret = mount(path, path, "", MS_BIND | MS_REMOUNT | MS_RDONLY | MS_REC | \
+ MS_NOEXEC | MS_NOSUID | MS_NODEV, "");
+ if (ret < 0)
+ goto on_error;
+ } else if (errno == EBUSY) {
+ DEBUG("Try to mount \"%s\" to readonly after 100ms.", path);
+ usleep(100 * 1000);
+ continue;
+ } else {
+ goto on_error;
+ }
+ }
+ return true;
+ }
+
+on_error:
+ SYSERROR("Unable to mount \"%s\" to readonly", path);
+ return false;
+}
+
+// isulad: setup rootfs masked paths
+static int setup_rootfs_maskedpaths(struct lxc_list *maskedpaths)
+{
+ struct lxc_list *it;
+
+ lxc_list_for_each(it, maskedpaths) {
+ if (!mask_path((char *)it->elem))
+ return -1;
+ }
+
+ return 0;
+}
+// isulad: setup rootfs ro paths
+static int setup_rootfs_ropaths(struct lxc_list *ropaths)
+{
+ struct lxc_list *it;
+
+ lxc_list_for_each(it, ropaths) {
+ if (!remount_readonly((char *)it->elem))
+ return -1;
+ }
+
+ return 0;
+}
+
+static int rootfs_parent_mount_private(char *rootfs)
+{
+ /* walk /proc/self/mountinfo and change parent of rootfs to private */
+ FILE *f = fopen("/proc/self/mountinfo", "r");
+ char *line = NULL;
+ char *parent = NULL, *options = NULL;
+ size_t len = 0;
+ int ret = 0;
+
+ if (!f) {
+ SYSERROR("Failed to open /proc/self/mountinfo to make parent of rootfs to private");
+ return -1;
+ }
+
+ while (getline(&line, &len, f) != -1) {
+ char *target = NULL;
+ char *opts = NULL;
+ char *tmptarget = NULL;
+ target = get_field(line, 4);
+ if (!target)
+ continue;
+ tmptarget = safe_strdup(target);
+ null_endofword(tmptarget);
+ if (!strstr(rootfs, tmptarget)) {
+ free(tmptarget);
+ continue;
+ }
+ if (!parent || strlen(tmptarget) > strlen(parent)) {
+ free(parent);
+ parent = tmptarget;
+ } else {
+ free(tmptarget);
+ continue;
+ }
+ opts = get_field(target, 2);
+ if (!opts)
+ continue;
+ null_endofword(opts);
+ free(options);
+ options = safe_strdup(opts);
+ }
+
+ if (!parent || !options) {
+ ERROR("Could not find parent mount of %s", rootfs);
+ ret = -1;
+ } else {
+ if (strstr(options, "shared")) {
+ if (mount(NULL, parent, NULL, MS_PRIVATE, NULL)) {
+ SYSERROR("Failed to make %s private", parent);
+ ret = -1;
+ }
+ DEBUG("Mounted parent %s of rootfs %s to private", parent, rootfs);
+ }
+ }
+ free(parent);
+ free(options);
+ fclose(f);
+ free(line);
+ return ret;
+}
+
+/* isulad: setup devices which will be populated in the container.*/
+static int setup_populate_devs(const struct lxc_rootfs *rootfs, struct lxc_list *devs, const char *mount_label)
+{
+ int ret = 0;
+ char *pathdirname = NULL;
+ char path[MAXPATHLEN];
+ mode_t file_mode = 0;
+ struct lxc_populate_devs *dev_elem = NULL;
+ struct lxc_list *it = NULL;
+ mode_t cur_mask;
+
+ INFO("Populating devices into container");
+ cur_mask = umask(0000);
+ lxc_list_for_each(it, devs) {
+ __do_free char *tmp_path = NULL;
+ ret = 0;
+ dev_elem = it->elem;
+
+ ret = snprintf(path, MAXPATHLEN, "%s/%s", rootfs->path ? rootfs->mount : "", dev_elem->name);
+ if (ret < 0 || ret >= MAXPATHLEN) {
+ ret = -1;
+ goto reset_umask;
+ }
+
+ /* create any missing directories */
+ tmp_path = safe_strdup(path);
+ pathdirname = dirname(tmp_path);
+ ret = mkdir_p(pathdirname, 0755);
+ if (ret < 0) {
+ WARN("Failed to create target directory");
+ ret = -1;
+ goto reset_umask;
+ }
+
+ if (!strcmp(dev_elem->type, "c")) {
+ file_mode = dev_elem->file_mode | S_IFCHR;
+ } else if (!strcmp(dev_elem->type, "b")) {
+ file_mode = dev_elem->file_mode | S_IFBLK;
+ } else {
+ ERROR("Failed to parse devices type '%s'", dev_elem->type);
+ ret = -1;
+ goto reset_umask;
+ }
+
+ DEBUG("Try to mknod '%s':'%d':'%d':'%d'\n", path,
+ file_mode, dev_elem->maj, dev_elem->min);
+
+ ret = mknod(path, file_mode, makedev(dev_elem->maj, dev_elem->min));
+ if (ret && errno != EEXIST) {
+ SYSERROR("Failed to mknod '%s':'%d':'%d':'%d'", dev_elem->name,
+ file_mode, dev_elem->maj, dev_elem->min);
+
+ char hostpath[MAXPATHLEN];
+ FILE *pathfile = NULL;
+
+ // Unprivileged containers cannot create devices, so
+ // try to bind mount the device from the host
+ // dev_elem name is the device path
+ ret = snprintf(hostpath, MAXPATHLEN, "%s", dev_elem->name);
+ if (ret < 0 || ret >= MAXPATHLEN) {
+ ret = -1;
+ goto reset_umask;
+ }
+ pathfile = lxc_fopen(path, "wb");
+ if (!pathfile) {
+ SYSERROR("Failed to create device mount target '%s'", path);
+ ret = -1;
+ goto reset_umask;
+ }
+ fclose(pathfile);
+ if (safe_mount(hostpath, path, 0, MS_BIND, NULL,
+ rootfs->path ? rootfs->mount : NULL, mount_label) != 0) {
+ SYSERROR("Failed bind mounting device %s from host into container",
+ dev_elem->name);
+ ret = -1;
+ goto reset_umask;
+ }
+ }
+ if (chown(path, dev_elem->uid, dev_elem->gid) < 0) {
+ ERROR("Error chowning %s", path);
+ ret = -1;
+ goto reset_umask;
+ }
+ ret = 0;
+ }
+
+reset_umask:
+ (void)umask(cur_mask);
+
+ INFO("Populated devices into container /dev");
+ return ret;
+}
+
+// isulad: setup rootfs mountopts
+static int setup_rootfs_mountopts(const struct lxc_rootfs *rootfs)
+{
+ unsigned long mflags, mntflags, pflags;
+ __do_free char *mntdata = NULL;
+
+ if(!rootfs || !rootfs->options)
+ return 0;
+
+ if (parse_mntopts_legacy(rootfs->options, &mntflags, &mntdata) < 0) {
+ return -1;
+ }
+
+ ret = parse_propagationopts(rootfs->options, &pflags);
+ if (ret < 0) {
+ return -EINVAL;
+ }
+
+ if (mntflags & MS_RDONLY) {
+ mflags = add_required_remount_flags("/", NULL, MS_BIND | MS_REC | mntflags | pflags | MS_REMOUNT);
+ DEBUG("remounting / as readonly");
+ if (mount("/", "/", NULL, mflags, 0) < 0) {
+ SYSERROR("Failed to make / readonly.");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int create_mtab_link()
+{
+ ssize_t ret;
+ int mret;
+ struct stat sbuf;
+ const char *pathname = "/proc/mounts";
+ const char *slink = "/etc/mtab";
+
+ if (file_exists(slink)) {
+ return 0;
+ }
+
+ ret = stat(pathname, &sbuf);
+ if (ret < 0) {
+ SYSERROR("Failed to stat %s: %s", pathname, strerror(errno));
+ return -1;
+ }
+
+ mret = symlink(pathname, slink);
+ if (mret < 0 && errno != EEXIST) {
+ if (errno == EROFS) {
+ WARN("Failed to create link %s for target %s. Read-only filesystem", slink, pathname);
+ } else {
+ SYSERROR("Failed to create \"%s\"", slink);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+struct oci_hook_conf {
+ defs_hook *ocihook;
+
+ int errfd;
+ int which;
+};
+
+struct wait_conf {
+ pid_t pid;
+ unsigned long long startat;
+ int timeout;
+ int errfd;
+ int which;
+};
+
+static char* generate_json_str(const char *name, const char *lxcpath, const char *rootfs)
+{
+ char *cpid = NULL;
+ char *inmsg = NULL;
+ int rc = 0, ret = 0;
+ size_t size;
+
+ if (!name || !lxcpath || !rootfs) {
+ ERROR("Invalid arguments");
+ return NULL;
+ }
+ cpid = getenv("LXC_PID");
+ if (!cpid) {
+ ERROR("Get container %s pid failed: %s", name, strerror(errno));
+ cpid = "-1";
+ }
+
+ if ((strlen(name) + strlen(cpid) + strlen(rootfs) + strlen(lxcpath) + strlen(name)) >
+ SIZE_MAX - (strlen("{\"ociVersion\":\"\",\"id\":\"\",\"pid\":,\"root\":\"\",\"bundle\":\"\"}") - 1 - 1)) {
+ ERROR("Out of memory");
+ ret = -1;
+ goto out_free;
+ }
+
+ // {"ociVersion":"","id":"xxx","pid":777,"root":"xxx","bundle":"xxx"}
+ size = strlen("{\"ociVersion\":\"\",\"id\":\"\",\"pid\":,\"root\":\"\",\"bundle\":\"\"}") +
+ strlen(name) + strlen(cpid) + strlen(rootfs) + strlen(lxcpath) + 1 + strlen(name) + 1;
+ inmsg = malloc(size);
+ if (inmsg == NULL) {
+ ERROR("Out of memory");
+ ret = -1;
+ goto out_free;
+ }
+ rc = snprintf(inmsg, size,
+ "{\"ociVersion\":\"\",\"id\":\"%s\",\"pid\":%s,\"root\":\"%s\",\"bundle\":\"%s/%s\"}",
+ name, cpid, rootfs, lxcpath, name);
+ if (rc < 0 || rc >= size) {
+ ERROR("Create json string failed");
+ ret = -1;
+ }
+
+out_free:
+ if (ret) {
+ free(inmsg);
+ inmsg = NULL;
+ }
+ return inmsg;
+}
+
+static char **merge_ocihook_env(char **oldenvs, size_t env_len, size_t *merge_env_len)
+{
+ char **result = NULL;
+ size_t result_len = env_len;
+ size_t i = 0;
+ size_t j, k;
+ char *tmpenv = NULL;
+ char *lxc_envs[] = {"LD_LIBRARY_PATH", "PATH", "LXC_CGNS_AWARE", "LXC_PID", "LXC_ROOTFS_MOUNT",
+ "LXC_CONFIG_FILE", "LXC_CGROUP_PATH", "LXC_ROOTFS_PATH", "LXC_NAME"
+ };
+ char *lxcenv_buf = NULL;
+
+ if (result_len > SIZE_MAX - (sizeof(lxc_envs) / sizeof(char *)) - 1)
+ return NULL;
+ result_len += (sizeof(lxc_envs) / sizeof(char *)) + 1;
+ result = malloc(sizeof(char *) * result_len);
+ if (result == NULL)
+ return NULL;
+ memset(result, 0, sizeof(char *) * result_len);
+
+ for(j = 0; j < (sizeof(lxc_envs) / sizeof(char *)); j++) {
+ size_t env_buf_len = 0;
+ tmpenv = getenv(lxc_envs[j]);
+ if (tmpenv && i < (result_len - 1)) {
+ if (strlen(tmpenv) > (SIZE_MAX - 1 - 1 - strlen(lxc_envs[j]))) {
+ lxc_free_array((void **)result, free);
+ return NULL;
+ }
+ env_buf_len = ((strlen(tmpenv) + 1) + strlen(lxc_envs[j])) + 1;
+ lxcenv_buf = malloc(env_buf_len);
+ if (lxcenv_buf == NULL) {
+ lxc_free_array((void **)result, free);
+ return NULL;
+ }
+ if (snprintf(lxcenv_buf, env_buf_len, "%s=%s", lxc_envs[j], tmpenv) < 0) {
+ free(lxcenv_buf);
+ continue;
+ }
+ result[i++] = lxcenv_buf;
+ lxcenv_buf = NULL;
+ }
+ }
+
+ for(k = 0; k < env_len; k++) {
+ if (oldenvs[k] && i < (result_len - 1))
+ result[i++] = safe_strdup(oldenvs[k]);
+ }
+
+ *merge_env_len = i;
+ return result;
+}
+
+static struct lxc_popen_FILE *lxc_popen_ocihook(const char *commandpath, char **args, int args_len,
+ char **envs, int env_len, const char *instr)
+{
+ int ret;
+ struct lxc_popen_FILE *fp = NULL;
+ int pipe_fds[2] = {-1, -1};
+ int pipe_msg[2] = {-1, -1};
+ pid_t child_pid;
+
+ ret = pipe2(pipe_fds, O_CLOEXEC | O_NONBLOCK);
+ if (ret < 0)
+ return NULL;
+
+ ret = pipe2(pipe_msg, O_CLOEXEC | O_NONBLOCK);
+ if (ret < 0) {
+ ERROR("Pipe msg failure");
+ close(pipe_fds[0]);
+ close(pipe_fds[1]);
+ return NULL;
+ }
+
+ child_pid = fork();
+ if (child_pid < 0)
+ goto on_error;
+
+ if (child_pid == 0) {
+ close(pipe_msg[1]);
+ if (pipe_msg[0] != STDIN_FILENO)
+ dup2(pipe_msg[0], STDIN_FILENO);
+ else {
+ if (fcntl(pipe_msg[0], F_SETFD, 0) != 0) {
+ fprintf(stderr, "Failed to remove FD_CLOEXEC from fd.");
+ exit(127);
+ }
+ }
+ close(pipe_msg[0]);
+
+ close(pipe_fds[0]);
+
+ /* duplicate stdout */
+ if (pipe_fds[1] != STDOUT_FILENO)
+ ret = dup2(pipe_fds[1], STDOUT_FILENO);
+ else
+ ret = fcntl(pipe_fds[1], F_SETFD, 0);
+ if (ret < 0) {
+ close(pipe_fds[1]);
+ _exit(EXIT_FAILURE);
+ }
+
+ /* duplicate stderr */
+ if (pipe_fds[1] != STDERR_FILENO)
+ ret = dup2(pipe_fds[1], STDERR_FILENO);
+ else
+ ret = fcntl(pipe_fds[1], F_SETFD, 0);
+ close(pipe_fds[1]);
+ if (ret < 0)
+ _exit(EXIT_FAILURE);
+
+ if (lxc_check_inherited(NULL, true, NULL, 0) != 0) {
+ fprintf(stderr, "check inherited fd failed");
+ exit(127);
+ }
+
+ /*
+ * Unblock signals.
+ * This is the main/only reason
+ * why we do our lousy popen() emulation.
+ */
+ {
+ sigset_t mask;
+ sigfillset(&mask);
+ sigprocmask(SIG_UNBLOCK, &mask, NULL);
+ }
+
+ if (env_len > 0)
+ execvpe(commandpath, args, envs);
+ else
+ execvp(commandpath, args);
+ fprintf(stderr, "fork/exec %s: %s", commandpath, strerror(errno));
+ exit(127);
+ }
+
+ /* parent */
+
+ close(pipe_fds[1]);
+ pipe_fds[1] = -1;
+
+ close(pipe_msg[0]);
+ pipe_msg[0]= -1;
+ if (instr) {
+ size_t len = strlen(instr);
+ if (lxc_write_nointr(pipe_msg[1], instr, len) != len) {
+ WARN("Write instr: %s failed", instr);
+ }
+ }
+ close(pipe_msg[1]);
+ pipe_msg[1]= -1;
+
+ fp = calloc(1, sizeof(*fp));
+ if (!fp) {
+ ERROR("Failed to allocate memory");
+ goto on_error;
+ }
+
+ fp->child_pid = child_pid;
+ fp->pipe = pipe_fds[0];
+
+ return fp;
+
+on_error:
+
+ if (pipe_fds[0] >= 0)
+ close(pipe_fds[0]);
+
+ if (pipe_fds[1] >= 0)
+ close(pipe_fds[1]);
+
+ if (pipe_msg[0] >= 0)
+ close(pipe_msg[0]);
+
+ if (pipe_msg[1] >= 0)
+ close(pipe_msg[1]);
+
+ if (fp)
+ free(fp);
+
+ return NULL;
+}
+
+void* wait_ocihook_timeout(void *arg)
+{
+ bool alive = false;
+ struct wait_conf *conf = (struct wait_conf *)arg;
+
+ if (!conf || conf->timeout < 1)
+ goto out;
+
+ sleep(conf->timeout);
+
+ alive = lxc_process_alive(conf->pid, conf->startat);
+
+ if (alive) {
+ ERROR("%s:%d: running %s hook caused \"hook ran past specified timeout of %.1fs\"",
+ __FILE__, __LINE__, lxchook_names[conf->which],
+ (double)conf->timeout);
+
+ lxc_write_error_message(conf->errfd, "%s:%d: running %s hook caused \"hook ran past specified timeout of %.1fs\".",
+ __FILE__, __LINE__, lxchook_names[conf->which],
+ (double)conf->timeout);
+
+ if (kill(conf->pid, SIGKILL) && errno != ESRCH) {
+ ERROR("Send kill signal failed");
+ goto out;
+ }
+ }
+
+out:
+ free(conf);
+ return ((void *)0);
+}
+
+static int run_ocihook_buffer(struct oci_hook_conf *oconf, const char *inmsg)
+{
+ struct lxc_popen_FILE *f;
+ char output[LXC_LOG_BUFFER_SIZE] = {0};
+ int ret;
+ pthread_t ptid;
+ int err;
+ struct wait_conf *conf = NULL;
+ pthread_attr_t attr;
+ char *buffer = oconf->ocihook->path;
+ char *err_args_msg = NULL;
+ char *err_envs_msg = NULL;
+ char **hookenvs = NULL;
+ size_t hookenvs_len = 0;
+
+ hookenvs = merge_ocihook_env(oconf->ocihook->env, oconf->ocihook->env_len, &hookenvs_len);
+ if (!hookenvs) {
+ ERROR("Out of memory.");
+ return -1;
+ }
+
+ f = lxc_popen_ocihook(buffer, oconf->ocihook->args, oconf->ocihook->args_len, hookenvs, hookenvs_len, inmsg);
+ lxc_free_array((void **)hookenvs, free);
+ if (!f) {
+ SYSERROR("Failed to popen() %s.", buffer);
+ return -1;
+ }
+
+ conf = malloc(sizeof(struct wait_conf));
+ if (conf == NULL) {
+ SYSERROR("Failed to malloc.");
+ goto on_error;
+ }
+
+ memset(conf, 0x00, sizeof(struct wait_conf));
+
+ conf->pid = f->child_pid;
+ conf->startat = lxc_get_process_startat(conf->pid);
+
+ INFO("hook_conf timeout %d", oconf->ocihook->timeout);
+ if(oconf->ocihook->timeout > 0)
+ conf->timeout = oconf->ocihook->timeout;
+ else {
+ conf->timeout = 30;
+ INFO("Set hook timeout 30s");
+ }
+ conf->errfd = oconf->errfd;
+ conf->which = oconf->which;
+
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ err = pthread_create(&ptid, &attr, wait_ocihook_timeout, conf);
+ pthread_attr_destroy(&attr);
+ if (err != 0) {
+ ERROR("Create wait timeout thread failed");
+ free(conf);
+ goto on_error;
+ }
+
+ ret = lxc_wait_for_pid_status(f->child_pid);
+
+ lxc_read_nointr(f->pipe, output, sizeof(output) - 1);
+ close(f->pipe);
+ free(f);
+
+ if (ret == -1) {
+ SYSERROR("Script exited with error.");
+ goto print_hook;
+ } else if (WIFEXITED(ret) && WEXITSTATUS(ret) != 0) {
+ ERROR("Script exited with status %d. output: %s", WEXITSTATUS(ret), output);
+ lxc_write_error_message(oconf->errfd, "%s:%d: running %s hook caused \"error running hook: exit status %d, output: %s\".",
+ __FILE__, __LINE__,
+ (oconf->which >= NUM_LXC_HOOKS) ? "invalid type" : lxchook_names[oconf->which],
+ WEXITSTATUS(ret), output);
+
+ goto print_hook;
+ } else if (WIFSIGNALED(ret)) {
+ ERROR("Script terminated by signal %d.", WTERMSIG(ret));
+ lxc_write_error_message(oconf->errfd, "%s:%d: running %s hook caused \"error running hook: Script terminated by signal %d\".",
+ __FILE__, __LINE__,
+ (oconf->which >= NUM_LXC_HOOKS) ? "invalid type" : lxchook_names[oconf->which],
+ WTERMSIG(ret));
+
+ goto print_hook;
+ }
+
+ return 0;
+
+on_error:
+ if (f) {
+ if (f->pipe >= 0)
+ close(f->pipe);
+ free(f);
+ }
+
+print_hook:
+ if (oconf->ocihook->args)
+ err_args_msg = lxc_string_join(" ", (const char **)oconf->ocihook->args, false);
+ if (oconf->ocihook->env)
+ err_envs_msg = lxc_string_join(" ", (const char **)oconf->ocihook->env, false);
+ ERROR("Hook script command: \"%s\", args: \"%s\", envs: \"%s\", timeout: %d.",
+ buffer, err_args_msg ? err_args_msg : "",
+ err_envs_msg ? err_envs_msg : "", oconf->ocihook->timeout);
+
+ free(err_args_msg);
+ free(err_envs_msg);
+ return -1;
+}
+
+static int run_ocihook_script_argv(const char *name, const char *section,
+ struct oci_hook_conf *oconf,
+ const char *lxcpath, const char *rootfs)
+{
+ int ret;
+ const char *script = oconf->ocihook->path;
+ char *inmsg = NULL;
+
+ INFO("Executing script \"%s\" for container \"%s\", config section \"%s\".",
+ script, name, section);
+
+ inmsg = generate_json_str(name, lxcpath, rootfs);
+ if (!inmsg) {
+ return -1;
+ }
+
+ ret = run_ocihook_buffer(oconf, inmsg);
+ free(inmsg);
+ inmsg = NULL;
+ return ret;
+}
+
+static char *get_root_path(const char *path, const char *backend)
+{
+ char *ret = NULL;
+ char *tmp = NULL;
+
+ if (!path) {
+ ret = safe_strdup("/");
+ return ret;
+ }
+ if (!backend) {
+ goto default_out;
+ }
+
+ if (strcmp(backend, "aufs") == 0 ||
+ strcmp(backend, "overlayfs") == 0 ||
+ strcmp(backend, "loop") == 0) {
+ tmp = strrchr(path, ':');
+ if (tmp == NULL) {
+ ERROR("Invalid root path format");
+ return NULL;
+ }
+ tmp++;
+ ret = safe_strdup(tmp);
+ return ret;
+ }
+
+default_out:
+ ret = safe_strdup(path);
+ return ret;
+}
+
+static int do_run_oci_hooks(const char *name, const char *lxcpath, struct lxc_conf *lc, int which, int errfd)
+{
+ struct oci_hook_conf work_conf = {0};
+ size_t i;
+ int ret = 0;
+ int nret = 0;
+ char *rootpath = NULL;
+
+ if (!lc) {
+ return -1;
+ }
+ if (!lc->ocihooks) {
+ return 0;
+ }
+
+ rootpath = get_root_path(lc->rootfs.path ? lc->rootfs.mount : NULL, lc->rootfs.bdev_type);
+ if (!rootpath) {
+ ERROR("Get container %s rootpath failed.", name);
+ return -1;
+ }
+
+ work_conf.errfd = errfd;
+ work_conf.which = which;
+ switch (which) {
+ case OCI_HOOK_PRESTART:
+ for (i = 0; i < lc->ocihooks->prestart_len; i++) {
+ work_conf.ocihook = lc->ocihooks->prestart[i];
+ ret = run_ocihook_script_argv(name, "lxc", &work_conf, lxcpath, rootpath);
+ if (ret != 0)
+ break;
+ }
+ break;
+ case OCI_HOOK_POSTSTART:
+ for (i = 0; i < lc->ocihooks->poststart_len; i++) {
+ work_conf.ocihook = lc->ocihooks->poststart[i];
+ nret = run_ocihook_script_argv(name, "lxc", &work_conf, lxcpath, rootpath);
+ if (nret != 0)
+ WARN("running poststart hook %zu failed, ContainerId: %s", i, name);
+ }
+ break;
+ case OCI_HOOK_POSTSTOP:
+ for (i = 0; i < lc->ocihooks->poststop_len; i++) {
+ work_conf.ocihook = lc->ocihooks->poststop[i];
+ nret = run_ocihook_script_argv(name, "lxc", &work_conf, lxcpath, rootpath);
+ if (nret != 0)
+ WARN("running poststart hook %zu failed, ContainerId: %s", i, name);
+ }
+ break;
+ default:
+ ret = -1;
+ }
+ if (rootpath)
+ free(rootpath);
+ return ret;
+}
+
+int run_oci_hooks(const char *name, const char *hookname, struct lxc_conf *conf, const char *lxcpath)
+{
+ int which = -1;
+
+ if (strcmp(hookname, "oci-prestart") == 0) {
+ which = OCI_HOOK_PRESTART;
+ if (!lxcpath) {
+ ERROR("oci hook require lxcpath");
+ return -1;
+ }
+ return do_run_oci_hooks(name, lxcpath, conf, which, conf->errpipe[1]);
+ } else if (strcmp(hookname, "oci-poststart") == 0) {
+ which = OCI_HOOK_POSTSTART;
+ if (!lxcpath) {
+ ERROR("oci hook require lxcpath");
+ return -1;
+ }
+ return do_run_oci_hooks(name, lxcpath, conf, which, conf->errpipe[1]);
+ } else if (strcmp(hookname, "oci-poststop") == 0) {
+ which = OCI_HOOK_POSTSTOP;
+ if (!lxcpath) {
+ ERROR("oci hook require lxcpath");
+ return -1;
+ }
+ return do_run_oci_hooks(name, lxcpath, conf, which, conf->errpipe[1]);
+ } else
+ return -1;
+
+ return 0;
+}
+
+/*isulad clear init args*/
+int lxc_clear_init_args(struct lxc_conf *lxc_conf)
+{
+ int i;
+
+ for (i = 0; i < lxc_conf->init_argc; i++) {
+ free(lxc_conf->init_argv[i]);
+ lxc_conf->init_argv[i] = NULL;
+ }
+ free(lxc_conf->init_argv);
+ lxc_conf->init_argv = NULL;
+ lxc_conf->init_argc = 0;
+
+ return 0;
+}
+
+/*isulad clear init groups*/
+int lxc_clear_init_groups(struct lxc_conf *lxc_conf)
+{
+ free(lxc_conf->init_groups);
+ lxc_conf->init_groups = NULL;
+ lxc_conf->init_groups_len = 0;
+
+ return 0;
+}
+
+/*isulad: clear populate devices*/
+int lxc_clear_populate_devices(struct lxc_conf *c)
+{
+ struct lxc_list *it = NULL;
+ struct lxc_list *next = NULL;
+
+ lxc_list_for_each_safe(it, &c->populate_devs, next) {
+ struct lxc_populate_devs *dev_elem = it->elem;
+ lxc_list_del(it);
+ free(dev_elem->name);
+ free(dev_elem->type);
+ free(dev_elem);
+ free(it);
+ }
+ return 0;
+}
+
+/*isulad: clear rootfs masked paths*/
+int lxc_clear_rootfs_masked_paths(struct lxc_conf *c)
+{
+ struct lxc_list *it = NULL;
+ struct lxc_list *next = NULL;
+
+ lxc_list_for_each_safe(it, &c->rootfs.maskedpaths, next) {
+ lxc_list_del(it);
+ free(it->elem);
+ free(it);
+ }
+ return 0;
+}
+
+/*isulad: clear rootfs ro paths*/
+int lxc_clear_rootfs_ro_paths(struct lxc_conf *c)
+{
+ struct lxc_list *it = NULL;
+ struct lxc_list *next = NULL;
+
+ lxc_list_for_each_safe(it, &c->rootfs.ropaths, next) {
+ lxc_list_del(it);
+ free(it->elem);
+ free(it);
+ }
+ return 0;
+}
+
+/*isulad: close error pipe */
+void lxc_close_error_pipe(int *errpipe)
+{
+ if (errpipe[0] >= 0) {
+ close(errpipe[0]);
+ errpipe[0] = -1;
+ }
+ if (errpipe[1] >= 0) {
+ close(errpipe[1]);
+ errpipe[1] = -1;
+ }
+}
+#endif
diff --git a/src/lxc/conf.h b/src/lxc/conf.h
index 82cb66a..683b8ba 100644
--- a/src/lxc/conf.h
+++ b/src/lxc/conf.h
@@ -31,6 +31,10 @@
#include "syscall_wrappers.h"
#include "terminal.h"
+#ifdef HAVE_ISULAD
+#include "oci_runtime_hooks.h"
+#endif
+
#if HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
@@ -255,6 +259,15 @@ struct lxc_rootfs {
bool managed;
struct lxc_mount_options mnt_opts;
struct lxc_storage *storage;
+#ifdef HAVE_ISULAD
+ /* isulad: maskedpaths */
+ struct lxc_list maskedpaths;
+ /* isulad: ropaths */
+ struct lxc_list ropaths;
+
+ /* Linux Security Modules SELinux context for device mount */
+ char *lsm_se_mount_context;
+#endif
};
/*
@@ -345,6 +358,11 @@ enum lxchooks {
LXCHOOK_CLONE,
LXCHOOK_DESTROY,
LXCHOOK_START_HOST,
+#ifdef HAVE_ISULAD
+ OCI_HOOK_PRESTART,
+ OCI_HOOK_POSTSTART,
+ OCI_HOOK_POSTSTOP,
+#endif
NUM_LXC_HOOKS
};
@@ -407,6 +425,27 @@ struct string_entry {
struct list_head head;
};
+#ifdef HAVE_ISULAD
+/*
+ * iSulad: Defines a structure to store the devices which will
+ * be attached in container
+ * @name : the target device name in container
+ * @type : the type of target device "c" or "b"
+ * @mode : file mode for the device
+ * @maj : major number for the device
+ * @min : minor number for the device
+ */
+struct lxc_populate_devs {
+ char *name;
+ char *type;
+ mode_t file_mode;
+ int maj;
+ int min;
+ uid_t uid;
+ gid_t gid;
+};
+#endif
+
struct lxc_conf {
/* Pointer to the name of the container. Do not free! */
const char *name;
@@ -574,6 +613,37 @@ struct lxc_conf {
struct timens_offsets timens;
+
+#ifdef HAVE_ISULAD
+ /* support oci hook */
+ oci_runtime_spec_hooks *ocihooks;
+
+ /* init args used to repalce init_cmd */
+ char **init_argv;
+ size_t init_argc;
+
+ gid_t *init_groups;
+ size_t init_groups_len;
+
+ /* populate devices */
+ struct lxc_list populate_devs;
+ mode_t umask; // umask value
+
+ char *container_info_file;
+
+ /* exit fifo fd*/
+ int exit_fd;
+
+ /* record error messages */
+ char *errmsg;
+
+ /* pipdfd for get error message of child or grandchild process */
+ int errpipe[2];
+
+ /* systemd value */
+ char *systemd;
+#endif
+
bool sched_core;
__u64 sched_core_cookie;
};
@@ -721,4 +791,16 @@ static inline int lxc_personality(personality_t persona)
__hidden extern int lxc_set_environment(const struct lxc_conf *conf);
__hidden extern int parse_cap(const char *cap_name, __u32 *cap);
+#ifdef HAVE_ISULAD
+// isulad add
+__hidden int lxc_clear_init_args(struct lxc_conf *lxc_conf);
+__hidden int lxc_clear_init_groups(struct lxc_conf *lxc_conf);
+__hidden int lxc_clear_populate_devices(struct lxc_conf *c);
+__hidden int lxc_clear_rootfs_masked_paths(struct lxc_conf *c);
+__hidden int lxc_clear_rootfs_ro_paths(struct lxc_conf *c);
+__hidden int lxc_drop_caps(struct lxc_conf *conf);
+__hidden int run_oci_hooks(const char *name, const char *hookname, struct lxc_conf *conf, const char *lxcpath);
+__hidden void lxc_close_error_pipe(int *errpipe);
+#endif
+
#endif /* __LXC_CONF_H */
diff --git a/src/lxc/isulad_utils.c b/src/lxc/isulad_utils.c
index ee39302..889d912 100644
--- a/src/lxc/isulad_utils.c
+++ b/src/lxc/isulad_utils.c
@@ -533,3 +533,28 @@ out:
funlockfile(stream);
return ret;
}
+
+ssize_t lxc_write_nointr_for_fifo(int fd, const char *buf, size_t count)
+{
+ ssize_t nret = 0;
+ ssize_t nwritten;
+
+ if (buf == NULL) {
+ return -1;
+ }
+
+ for (nwritten = 0; nwritten < count;) {
+ nret = write(fd, buf + nwritten, count - nwritten);
+ if (nret < 0) {
+ if (errno == EINTR || errno == EAGAIN) {
+ continue;
+ } else {
+ return nret;
+ }
+ } else {
+ nwritten += nret;
+ }
+ }
+
+ return nwritten;
+}
diff --git a/src/lxc/isulad_utils.h b/src/lxc/isulad_utils.h
index 7a5eb89..93174ae 100644
--- a/src/lxc/isulad_utils.h
+++ b/src/lxc/isulad_utils.h
@@ -80,23 +80,25 @@ typedef struct proc_t {
processor; /* current (or most recent?) CPU */
} proc_t;
-extern int lxc_mem_realloc(void **newptr, size_t newsize, void *oldptr, size_t oldsize);
-extern void *lxc_common_calloc_s(size_t size);
-extern char *safe_strdup(const char *src);
+__hidden extern int lxc_mem_realloc(void **newptr, size_t newsize, void *oldptr, size_t oldsize);
+__hidden extern void *lxc_common_calloc_s(size_t size);
+__hidden extern char *safe_strdup(const char *src);
-extern int lxc_open(const char *filename, int flags, mode_t mode);
-extern FILE *lxc_fopen(const char *filename, const char *mode);
+__hidden extern int lxc_open(const char *filename, int flags, mode_t mode);
+__hidden extern FILE *lxc_fopen(const char *filename, const char *mode);
-extern void lxc_write_error_message(int errfd, const char *format, ...);
-extern int lxc_file2str(const char *filename, char ret[], int cap);
-extern int unsigned long long lxc_get_process_startat(pid_t pid);
+__hidden extern void lxc_write_error_message(int errfd, const char *format, ...);
+__hidden extern int lxc_file2str(const char *filename, char ret[], int cap);
+__hidden extern int unsigned long long lxc_get_process_startat(pid_t pid);
// set env home in container
-extern int lxc_setup_env_home(uid_t uid);
+__hidden extern int lxc_setup_env_home(uid_t uid);
-extern bool lxc_process_alive(pid_t pid, unsigned long long start_time);
+__hidden extern bool lxc_process_alive(pid_t pid, unsigned long long start_time);
-extern bool is_non_negative_num(const char *s);
+__hidden extern bool is_non_negative_num(const char *s);
-int util_getpwent_r(FILE *stream, struct passwd *resbuf, char *buffer, size_t buflen, struct passwd **result);
+__hidden int util_getpwent_r(FILE *stream, struct passwd *resbuf, char *buffer, size_t buflen, struct passwd **result);
+
+__hidden extern ssize_t lxc_write_nointr_for_fifo(int fd, const char *buf, size_t count);
#endif
diff --git a/src/lxc/lsm/apparmor.c b/src/lxc/lsm/apparmor.c
index 23af021..7ff5ba1 100644
--- a/src/lxc/lsm/apparmor.c
+++ b/src/lxc/lsm/apparmor.c
@@ -1232,6 +1232,16 @@ static int apparmor_process_label_set(struct lsm_ops *ops, const char *inlabel,
return log_info(0, "Changed AppArmor profile to %s", label);
}
+#ifdef HAVE_ISULAD
+static int apparmor_file_label_set(const char *path, const char *label) {
+ return 0;
+}
+
+static int apparmor_relabel(const char *path, const char *label, bool shared) {
+ return 0;
+}
+#endif
+
static struct lsm_ops apparmor_ops = {
.name = "AppArmor",
.aa_admin = -1,
@@ -1250,6 +1260,10 @@ static struct lsm_ops apparmor_ops = {
.process_label_set = apparmor_process_label_set,
.process_label_get_at = apparmor_process_label_get_at,
.process_label_set_at = apparmor_process_label_set_at,
+#ifdef HAVE_ISULAD
+ .file_label_set = apparmor_file_label_set,
+ .relabel = apparmor_relabel,
+#endif
};
struct lsm_ops *lsm_apparmor_ops_init(void)
diff --git a/src/lxc/lsm/lsm.h b/src/lxc/lsm/lsm.h
index a26abb8..93e1a99 100644
--- a/src/lxc/lsm/lsm.h
+++ b/src/lxc/lsm/lsm.h
@@ -34,6 +34,10 @@ struct lsm_ops {
int (*process_label_fd_get)(struct lsm_ops *ops, pid_t pid, bool on_exec);
char *(*process_label_get_at)(struct lsm_ops *ops, int fd_pid);
int (*process_label_set_at)(struct lsm_ops *ops, int label_fd, const char *label, bool on_exec);
+#ifdef HAVE_ISULAD
+ int (*file_label_set)(const char *path, const char *label);
+ int (*relabel)(const char *path, const char *label, bool share);
+#endif
};
__hidden extern struct lsm_ops *lsm_init_static(void);
diff --git a/src/lxc/lsm/nop.c b/src/lxc/lsm/nop.c
index 56b97aa..d3f4081 100644
--- a/src/lxc/lsm/nop.c
+++ b/src/lxc/lsm/nop.c
@@ -51,6 +51,16 @@ static int nop_process_label_set_at(struct lsm_ops *ops, int label_fd, const cha
return 0;
}
+#ifdef HAVE_ISULAD
+static int nop_file_label_set(const char *path, const char *label) {
+ return 0;
+}
+
+static int nop_relabel(const char *path, const char *label, bool shared) {
+ return 0;
+}
+#endif
+
static struct lsm_ops nop_ops = {
.name = "nop",
.aa_admin = -1,
@@ -69,6 +79,10 @@ static struct lsm_ops nop_ops = {
.process_label_set = nop_process_label_set,
.process_label_get_at = nop_process_label_get_at,
.process_label_set_at = nop_process_label_set_at,
+#ifdef HAVE_ISULAD
+ .file_label_set = nop_file_label_set,
+ .relabel = nop_relabel,
+#endif
};
struct lsm_ops *lsm_nop_ops_init(void)
diff --git a/src/lxc/lsm/selinux.c b/src/lxc/lsm/selinux.c
index 9c131ee..5190110 100644
--- a/src/lxc/lsm/selinux.c
+++ b/src/lxc/lsm/selinux.c
@@ -9,6 +9,9 @@
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
+#ifdef HAVE_ISULAD
+#include <selinux/context.h>
+#endif
#include "conf.h"
#include "file_utils.h"
@@ -165,6 +168,255 @@ static int selinux_enabled(struct lsm_ops *ops)
return is_selinux_enabled();
}
+#ifdef HAVE_ISULAD
+/*
+ * selinux_file_label_set: Set SELinux context of a file
+ *
+ * @path : a file
+ * @label : label string
+ *
+ * Returns 0 on success, < 0 on failure
+ */
+static int selinux_file_label_set(const char *path, const char *label)
+{
+ if (path == NULL || label == NULL || strcmp(label, "unconfined_t") == 0) {
+ return 0;
+ }
+
+ if (!is_selinux_enabled()) {
+ return 0;
+ }
+
+ if (lsetfilecon(path, label) != 0) {
+ SYSERROR("Failed to setSELinux context to \"%s\": %s", label, path);
+ return -1;
+ }
+
+ INFO("Changed SELinux context to \"%s\": %s", label, path);
+ return 0;
+}
+
+/*
+ * is_exclude_relabel_path: Determine whether it is a excluded path to label
+ *
+ * @path : a file or directory
+ *
+ * Returns 0 on success, < 0 on failure
+ */
+static bool is_exclude_relabel_path(const char *path)
+{
+ const char *exclude_path[] = { "/", "/usr", "/etc", "/tmp", "/home", "/run", "/var", "/root" };
+ size_t i;
+
+ for (i = 0; i < sizeof(exclude_path) / sizeof(char *); i++) {
+ if (strcmp(path, exclude_path[i]) == 0) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+/*
+ * bad_prefix: Prevent users from relabing system files
+ *
+ * @path : a file or directory
+ *
+ * Returns 0 on success, < 0 on failure
+ */
+static int bad_prefix(const char *fpath)
+{
+ const char *bad_prefixes = "/usr";
+
+ if (fpath == NULL) {
+ ERROR("Empty file path");
+ return -1;
+ }
+
+ if (strncmp(fpath, bad_prefixes, strlen(bad_prefixes)) == 0) {
+ ERROR("relabeling content in %s is not allowed", bad_prefixes);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * recurse_set_file_label: Recursively label files or folders
+ *
+ * @path : a file or directory
+ * @label : label string
+ *
+ * Returns 0 on success, < 0 on failure
+ */
+static int recurse_set_file_label(const char *basePath, const char *label)
+{
+ int ret = 0;
+ __do_closedir DIR *dir = NULL;
+ struct dirent *ptr = NULL;
+ char base[PATH_MAX] = { 0 };
+
+ if ((dir = opendir(basePath)) == NULL) {
+ ERROR("Failed to Open dir: %s", basePath);
+ return -1;
+ }
+
+ ret = lsetfilecon(basePath, label);
+ if (ret != 0) {
+ ERROR("Failed to set file label");
+ return ret;
+ }
+
+ while ((ptr = readdir(dir)) != NULL) {
+ if (strcmp(ptr->d_name, ".") == 0 || strcmp(ptr->d_name, "..") == 0) {
+ continue;
+ } else {
+ int nret = snprintf(base, sizeof(base), "%s/%s", basePath, ptr->d_name);
+ if (nret < 0 || nret >= sizeof(base)) {
+ ERROR("Failed to get path");
+ return -1;
+ }
+ if (ptr->d_type == DT_DIR) {
+ ret = recurse_set_file_label(base, label);
+ if (ret != 0) {
+ ERROR("Failed to set dir label");
+ return ret;
+ }
+ } else {
+ ret = lsetfilecon(base, label);
+ if (ret != 0) {
+ ERROR("Failed to set file label");
+ return ret;
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * selinux_chcon: Chcon changes the `fpath` file object to the SELinux label `label`.
+ * If `fpath` is a directory and `recurse`` is true, Chcon will walk the
+ * directory tree setting the label.
+ *
+ * @fpath : a file or directory
+ * @label : label string
+ * @recurse : whether to recurse
+ *
+ * Returns 0 on success, < 0 on failure
+ */
+static int selinux_chcon(const char *fpath, const char *label, bool recurse)
+{
+ struct stat s_buf;
+
+ if (fpath == NULL || label == NULL) {
+ ERROR("Invalid parameters!");
+ return -1;
+ }
+
+ if (bad_prefix(fpath) != 0) {
+ return -1;
+ }
+ if (stat(fpath, &s_buf) != 0) {
+ return -1;
+ }
+ if (recurse && S_ISDIR(s_buf.st_mode)) {
+ return recurse_set_file_label(fpath, label);
+ }
+
+ if (lsetfilecon(fpath, label) != 0) {
+ ERROR("Failed to set file label");
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * convert_context_to_share_mode: set sensitivity to s0 and remove categories
+ * user:role:type:sensitivity[:categories] => user:role:type:s0
+ *
+ * @label : label string
+ *
+ * Returns label with share mode on success, NULL on failure
+ */
+static char *convert_context_to_share_mode(const char *label) {
+ __do_free char *converted_label = strdup(label);
+ char *s = converted_label;
+ const char *shared_level = "s0";
+ int cnt = 0;
+
+ // selinux label format: user:role:type:sensitivity[:categories]
+ // locates the ":" position in front of the sensitivity
+ while (cnt++ < 3 && (s = strchr(s, ':')) != NULL) {
+ s++;
+ }
+
+ // make sure sensitivity can set s0 value
+ if (s == NULL || strlen(s) < strlen(shared_level)) {
+ ERROR("Invalid selinux file context: %s", label);
+ return NULL;
+ }
+
+ if (strcmp(s, shared_level) == 0) {
+ return move_ptr(converted_label);
+ }
+
+ *s = '\0';
+ strcat(converted_label, shared_level);
+
+ return move_ptr(converted_label);
+}
+
+/*
+ * selinux_relabel: Relabel changes the label of path to the filelabel string.
+ * It changes the MCS label to s0 if shared is true.
+ * This will allow all containers to share the content.
+ *
+ * @path : a file or directory
+ * @label : label string
+ * @shared : whether to use share mode
+ *
+ * Returns 0 on success, < 0 on failure
+ */
+static int selinux_relabel(const char *path, const char *label, bool shared)
+{
+ __do_free char *tmp_file_label = NULL;
+
+ if (path == NULL || label == NULL) {
+ return 0;
+ }
+
+ if (!is_selinux_enabled()) {
+ return 0;
+ }
+
+ if (is_exclude_relabel_path(path)) {
+ ERROR("SELinux relabeling of %s is not allowed", path);
+ return -1;
+ }
+
+ if (shared) {
+ tmp_file_label = convert_context_to_share_mode(label);
+ if (tmp_file_label == NULL) {
+ ERROR("Failed to convert context to share mode: %s", label);
+ return -1;
+ }
+ } else {
+ tmp_file_label = strdup(label);
+ }
+
+
+ if (selinux_chcon(path, tmp_file_label, true) != 0) {
+ ERROR("Failed to modify %s's selinux context: %s", path, tmp_file_label);
+ return -1;
+ }
+
+ return 0;
+}
+#endif
+
static struct lsm_ops selinux_ops = {
.name = "SELinux",
.aa_admin = -1,
@@ -183,6 +435,10 @@ static struct lsm_ops selinux_ops = {
.process_label_set = selinux_process_label_set,
.process_label_get_at = selinux_process_label_get_at,
.process_label_set_at = selinux_process_label_set_at,
+#ifdef HAVE_ISULAD
+ .file_label_set = selinux_file_label_set,
+ .relabel = selinux_relabel,
+#endif
};
struct lsm_ops *lsm_selinux_ops_init(void)
diff --git a/src/lxc/lxc.h b/src/lxc/lxc.h
index e58fb21..879e899 100644
--- a/src/lxc/lxc.h
+++ b/src/lxc/lxc.h
@@ -88,6 +88,13 @@ __hidden extern lxc_state_t lxc_state(const char *name, const char *lxcpath);
*/
extern struct lxc_container *lxc_container_new(const char *name, const char *configpath);
+#ifdef HAVE_ISULAD
+/*
+ * Create a new container without loading config.
+ */
+extern struct lxc_container *lxc_container_without_config_new(const char *name, const char *configpath);
+#endif
+
/*
* Returns 1 on success, 0 on failure.
*/
diff --git a/src/lxc/lxclock.c b/src/lxc/lxclock.c
index acddc13..2c15daf 100644
--- a/src/lxc/lxclock.c
+++ b/src/lxc/lxclock.c
@@ -310,3 +310,30 @@ void container_disk_unlock(struct lxc_container *c)
lxcunlock(c->slock);
lxcunlock(c->privlock);
}
+
+#ifdef HAVE_ISULAD
+static int lxc_removelock(struct lxc_lock *l)
+{
+ int ret = 0;
+
+ if (l->type == LXC_LOCK_FLOCK) {
+ ret = unlink(l->u.f.fname);
+ if (ret && errno != ENOENT) {
+ SYSERROR("Error unlink %s", l->u.f.fname);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+int container_disk_removelock(struct lxc_container *c)
+{
+ int ret;
+
+ ret = lxc_removelock(c->slock);
+ if (ret)
+ return ret;
+ return lxc_removelock(c->privlock);
+}
+#endif
\ No newline at end of file
diff --git a/src/lxc/lxclock.h b/src/lxc/lxclock.h
index a20d356..987c3e5 100644
--- a/src/lxc/lxclock.h
+++ b/src/lxc/lxclock.h
@@ -158,4 +158,8 @@ __hidden extern int container_disk_lock(struct lxc_container *c);
*/
__hidden extern void container_disk_unlock(struct lxc_container *c);
+#ifdef HAVE_ISULAD
+__hidden int container_disk_removelock(struct lxc_container *c);
+#endif
+
#endif
diff --git a/src/lxc/mainloop.c b/src/lxc/mainloop.c
index a98e21a..765240e 100644
--- a/src/lxc/mainloop.c
+++ b/src/lxc/mainloop.c
@@ -532,3 +532,19 @@ void lxc_mainloop_close(struct lxc_async_descr *descr)
INIT_LIST_HEAD(&descr->handlers);
}
+
+#ifdef HAVE_ISULAD
+int isulad_safe_mainloop(struct lxc_epoll_descr *descr, int timeout_ms)
+{
+ int ret;
+
+ ret = lxc_mainloop(descr, timeout_ms);
+
+ // There are stdout and stderr channels, and two epolls should be performed to prevent
+ // one of the channels from exiting first, causing the other channel to not receive data,
+ // resulting in data loss
+ (void)lxc_mainloop(descr, 100);
+
+ return ret;
+}
+#endif
diff --git a/src/lxc/mainloop.h b/src/lxc/mainloop.h
index 7d644b7..e8ce082 100644
--- a/src/lxc/mainloop.h
+++ b/src/lxc/mainloop.h
@@ -65,4 +65,8 @@ __hidden extern void lxc_mainloop_close(struct lxc_async_descr *descr);
define_cleanup_function(struct lxc_async_descr *, lxc_mainloop_close);
+#ifdef HAVE_ISULAD
+__hidden extern int isulad_safe_mainloop(struct lxc_epoll_descr *descr, int timeout_ms);
+#endif
+
#endif
diff --git a/src/lxc/mount_utils.c b/src/lxc/mount_utils.c
index fe8da82..be154af 100644
--- a/src/lxc/mount_utils.c
+++ b/src/lxc/mount_utils.c
@@ -539,6 +539,11 @@ bool can_use_mount_api(void)
{
static int supported = -1;
+#ifdef HAVE_ISULAD
+ // isulad just use save_mount()
+ return supported == 1;
+#endif
+
if (supported == -1) {
__do_close int fd = -EBADF;
diff --git a/src/lxc/seccomp.c b/src/lxc/seccomp.c
index 5a725f6..f0fa297 100644
--- a/src/lxc/seccomp.c
+++ b/src/lxc/seccomp.c
@@ -352,8 +352,13 @@ static int get_hostarch(void)
return lxc_seccomp_arch_unknown;
}
+#ifdef HAVE_ISULAD
+static scmp_filter_ctx get_new_ctx(enum lxc_hostarch_t n_arch, uint32_t default_policy_action,
+ uint32_t *architectures)
+#else
static scmp_filter_ctx get_new_ctx(enum lxc_hostarch_t n_arch, uint32_t default_policy_action,
bool *needs_merge)
+#endif
{
int ret;
uint32_t arch;
@@ -477,9 +482,17 @@ static scmp_filter_ctx get_new_ctx(enum lxc_hostarch_t n_arch, uint32_t default_
}
TRACE("Removed native arch from main seccomp context");
+#ifdef HAVE_ISULAD
+ *architectures = arch;
+#else
*needs_merge = true;
+#endif
} else {
+#ifdef HAVE_ISULAD
+ *architectures = SCMP_ARCH_NATIVE;
+#else
*needs_merge = false;
+#endif
TRACE("Arch %d already present in main seccomp context", (int)n_arch);
}
@@ -517,8 +530,13 @@ static enum lxc_seccomp_rule_status_t do_resolve_add_rule(uint32_t arch, char *l
SCMP_A1(SCMP_CMP_MASKED_EQ, MNT_FORCE, MNT_FORCE));
if (ret < 0) {
errno = -ret;
+#ifdef HAVE_ISULAD
+ SYSWARN("Failed loading rule to reject force umount");
+ return lxc_seccomp_rule_added;
+#else
SYSERROR("Failed loading rule to reject force umount");
return lxc_seccomp_rule_err;
+#endif
}
INFO("Set seccomp rule to reject force umounts");
@@ -544,11 +562,19 @@ static enum lxc_seccomp_rule_status_t do_resolve_add_rule(uint32_t arch, char *l
memset(&arg_cmp, 0, sizeof(arg_cmp));
for (size_t i = 0; i < rule->args_num; i++) {
+#ifdef HAVE_ISULAD
+ DEBUG("arg_cmp[%zu]: SCMP_CMP(%u, %llu, %llu, %llu)", i,
+ rule->args_value[i].index,
+ (long long unsigned int)rule->args_value[i].op,
+ (long long unsigned int)rule->args_value[i].mask,
+ (long long unsigned int)rule->args_value[i].value);
+#else
INFO("arg_cmp[%zu]: SCMP_CMP(%u, %llu, %llu, %llu)", i,
rule->args_value[i].index,
(long long unsigned int)rule->args_value[i].op,
(long long unsigned int)rule->args_value[i].mask,
(long long unsigned int)rule->args_value[i].value);
+#endif
if (SCMP_CMP_MASKED_EQ == rule->args_value[i].op)
arg_cmp[i] = SCMP_CMP(rule->args_value[i].index,
@@ -569,9 +595,15 @@ static enum lxc_seccomp_rule_status_t do_resolve_add_rule(uint32_t arch, char *l
rule->args_num, arg_cmp);
if (ret < 0) {
errno = -ret;
+#ifdef HAVE_ISULAD
+ SYSDEBUG("Failed to add rule for syscall[%d:%s] action[%d:%s] arch[%u]",
+ nr, line, rule->action, get_action_name(rule->action), arch);
+ return lxc_seccomp_rule_added;
+#else
SYSERROR("Failed to add rule for syscall[%d:%s] action[%d:%s] arch[%u]",
nr, line, rule->action, get_action_name(rule->action), arch);
return lxc_seccomp_rule_err;
+#endif
}
return lxc_seccomp_rule_added;
diff --git a/src/lxc/start.h b/src/lxc/start.h
index cd36bc5..bbd1a83 100644
--- a/src/lxc/start.h
+++ b/src/lxc/start.h
@@ -123,6 +123,17 @@ struct lxc_handler {
struct cgroup_ops *cgroup_ops;
+#ifdef HAVE_ISULAD
+ int exit_code;/* isulad: record the exit code of container */
+ /* Indicates whether should we using pipes or pty dup to std{in,out,err} for console log. */
+ bool disable_pty;
+ /* Indicates whether should we keep stdin active. */
+ bool open_stdin;
+ bool image_type_oci;
+ // isulad need timeout in __lxc_start
+ unsigned int start_timeout;
+#endif
+
/* Internal fds that always need to stay open. */
int keep_fds[3];
diff --git a/src/lxc/tools/arguments.h b/src/lxc/tools/arguments.h
index 92510ec..d5c9169 100644
--- a/src/lxc/tools/arguments.h
+++ b/src/lxc/tools/arguments.h
@@ -126,6 +126,20 @@ struct lxc_arguments {
const char *want_hostname;
bool setuid;
+#ifdef HAVE_ISULAD
+ char *workdir;
+ const char *container_info; /* isulad: file used to store pid and ppid info of container */
+ char *terminal_fifos[3]; /* isulad add, fifos used to redirct stdin/out/err */
+ const char *exit_monitor_fifo; /* isulad: fifo used to monitor state of monitor process */
+ const char *suffix; /* isulad add, suffix used for connect with parent of execed process*/
+ int disable_pty;
+ int open_stdin;
+ unsigned int start_timeout; /* isulad: Seconds for waiting on a container to start before it is killed*/
+ int64_t attach_timeout; /* for lxc-attach */
+ gid_t *add_gids;
+ size_t add_gids_len;
+#endif
+
/* remaining arguments */
char *const *argv;
int argc;
@@ -156,6 +170,20 @@ struct lxc_arguments {
#define OPT_SHARE_UTS OPT_USAGE - 5
#define OPT_SHARE_PID OPT_USAGE - 6
+#ifdef HAVE_ISULAD
+#define OPT_INPUT_FIFO OPT_USAGE - 7
+#define OPT_OUTPUT_FIFO OPT_USAGE - 8
+#define OPT_STDERR_FIFO OPT_USAGE - 9
+#define OPT_CONTAINER_INFO OPT_USAGE - 10
+#define OPT_EXIT_FIFO OPT_USAGE - 11
+#define OPT_START_TIMEOUT OPT_USAGE - 12
+#define OPT_DISABLE_PTY OPT_USAGE - 13
+#define OPT_OPEN_STDIN OPT_USAGE - 14
+#define OPT_ATTACH_TIMEOUT OPT_USAGE - 15
+#define OPT_ATTACH_SUFFIX OPT_USAGE - 16
+#define OPT_ADDITIONAL_GIDS OPT_USAGE - 17
+#endif
+
__hidden extern int lxc_arguments_parse(struct lxc_arguments *args, int argc, char *const argv[]);
__hidden extern int lxc_arguments_str_to_int(struct lxc_arguments *args, const char *str);
diff --git a/src/lxc/tools/lxc_attach.c b/src/lxc/tools/lxc_attach.c
index 8c519f1..1283bcf 100644
--- a/src/lxc/tools/lxc_attach.c
+++ b/src/lxc/tools/lxc_attach.c
@@ -73,9 +73,22 @@ static const struct option my_longopts[] = {
{"set-var", required_argument, 0, 'v'},
{"pty-log", required_argument, 0, 'L'},
{"rcfile", required_argument, 0, 'f'},
+ {"context", required_argument, 0, 'c'},
+#ifndef HAVE_ISULAD
{"uid", required_argument, 0, 'u'},
{"gid", required_argument, 0, 'g'},
- {"context", required_argument, 0, 'c'},
+#else
+ {"workdir", required_argument, 0, 'w'},
+ {"user", required_argument, 0, 'u'},
+ {"add-gids", required_argument, 0, OPT_ADDITIONAL_GIDS},
+ {"in-fifo", required_argument, 0, OPT_INPUT_FIFO}, /* isulad add terminal fifos*/
+ {"out-fifo", required_argument, 0, OPT_OUTPUT_FIFO},
+ {"err-fifo", required_argument, 0, OPT_STDERR_FIFO},
+ {"suffix", required_argument, 0, OPT_ATTACH_SUFFIX},
+ {"timeout", required_argument, 0, OPT_ATTACH_TIMEOUT},
+ {"disable-pty", no_argument, 0, OPT_DISABLE_PTY},
+ {"open-stdin", no_argument, 0, OPT_OPEN_STDIN},
+#endif
LXC_COMMON_OPTIONS
};
@@ -126,11 +139,29 @@ Options :\n\
multiple times.\n\
-f, --rcfile=FILE\n\
Load configuration file FILE\n\
- -u, --uid=UID Execute COMMAND with UID inside the container\n\
- -g, --gid=GID Execute COMMAND with GID inside the container\n\
-c, --context=context\n\
SELinux Context to transition into\n\
-",
+"
+#ifndef HAVE_ISULAD
+"\
+ -u, --uid=UID Execute COMMAND with UID inside the container\n\
+ -g, --gid=GID Execute COMMAND with GID inside the container\n\
+"
+#else
+"\
+ -w, --workdir Working directory inside the container.\n\
+ -u, --user User ID (format: UID[:GID])\n\
+ --add-gids Additional gids (format: GID[,GID])\n\
+ --in-fifo Stdin fifo path\n\
+ --out-fifo Stdout fifo path\n\
+ --err-fifo Stderr fifo path\n\
+ --suffix ID for mutli-attach on one container\n\
+ --timeout Timeout in seconds (default: 0)\n\
+ --disable-pty Disable pty for attach\n\
+ --open-stdin Open stdin for attach\n\
+"
+#endif
+,
.options = my_longopts,
.parser = my_parser,
.checker = NULL,
@@ -140,6 +171,123 @@ Options :\n\
.gid = LXC_INVALID_GID,
};
+#ifdef HAVE_ISULAD
+static int parse_user_id(const char *username, char **uid, char **gid, char **tmp_dup)
+{
+ char *tmp = NULL;
+ char *pdot = NULL;
+
+ if (uid == NULL || gid == NULL || tmp_dup == NULL) {
+ return -1;
+ }
+
+ if (username != NULL) {
+ tmp = strdup(username);
+ if (tmp == NULL) {
+ ERROR("Failed to duplicate user name");
+ return -1;
+ }
+
+ // for free tmp in caller
+ *tmp_dup = tmp;
+ pdot = strstr(tmp, ":");
+ if (pdot != NULL) {
+ *pdot = '\0';
+ if (pdot != tmp) {
+ // uid found
+ *uid = tmp;
+ }
+
+ if (*(pdot + 1) != '\0') {
+ // gid found
+ *gid = pdot + 1;
+ }
+ } else {
+ // No : found
+ if (*tmp != '\0') {
+ *uid = tmp;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int get_attach_uid_gid(const char *username, uid_t *user_id, gid_t *group_id)
+{
+ char *tmp = NULL;
+ char *uid = NULL;
+ char *gid = NULL;
+
+ // parse uid and gid by username
+ if (parse_user_id(username, &uid, &gid, &tmp) != 0) {
+ return -1;
+ }
+
+ if (uid != NULL) {
+ *user_id = (unsigned int)atoll(uid);
+ }
+ if (gid != NULL) {
+ *group_id = (unsigned int)atoll(gid);
+ }
+
+ free(tmp);
+ return 0;
+}
+
+static int get_attach_add_gids(const char *add_gids, gid_t **gids, size_t *gids_len)
+{
+ long long int readvalue;
+ size_t i, len;
+ const size_t max_gids = 100;
+ gid_t *g = NULL;
+ __do_free_string_list char **gids_str = NULL;
+
+ if (add_gids == NULL || strlen(add_gids) == 0) {
+ ERROR("None additional gids");
+ return -1;
+ }
+
+ gids_str = lxc_string_split(add_gids, ',');
+ if (gids_str == NULL) {
+ ERROR("Failed to split additional gids");
+ return -1;
+ }
+
+ len = lxc_array_len((void **)gids_str);
+ if (len > max_gids) {
+ ERROR("Too many gids");
+ return -1;
+ }
+
+ g = calloc(len, sizeof(gid_t));
+ if (g == NULL) {
+ ERROR("Out of memory");
+ return -1;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (lxc_safe_long_long(gids_str[i], &readvalue) != 0) {
+ SYSERROR("Invalid gid value %s", gids_str[i]);
+ goto err_out;
+ }
+ if (readvalue < 0) {
+ ERROR("Invalid gid value: %lld", readvalue);
+ goto err_out;
+ }
+ g[i] = (unsigned int)readvalue;
+ }
+
+ *gids = g;
+ *gids_len = len;
+ return 0;
+
+err_out:
+ free(g);
+ return -1;
+}
+#endif
+
static int my_parser(struct lxc_arguments *args, int c, char *arg)
{
int ret;
@@ -197,6 +345,10 @@ static int my_parser(struct lxc_arguments *args, int c, char *arg)
case 'f':
args->rcfile = arg;
break;
+ case 'c':
+ selinux_context = arg;
+ break;
+#ifndef HAVE_ISULAD
case 'u':
if (lxc_safe_uint(arg, &args->uid) < 0)
return -1;
@@ -205,9 +357,48 @@ static int my_parser(struct lxc_arguments *args, int c, char *arg)
if (lxc_safe_uint(arg, &args->gid) < 0)
return -1;
break;
- case 'c':
- selinux_context = arg;
- break;
+#else
+ case 'u':
+ if (get_attach_uid_gid(arg, &args->uid, &args->gid) != 0) {
+ ERROR("Failed to get attach user U/GID");
+ return -1;
+ }
+ break;
+ case 'w':
+ args->workdir=arg;
+ break;
+ case OPT_INPUT_FIFO:
+ args->terminal_fifos[0] = arg;
+ break;
+ case OPT_OUTPUT_FIFO:
+ args->terminal_fifos[1] = arg;
+ break;
+ case OPT_STDERR_FIFO:
+ args->terminal_fifos[2] = arg;
+ break;
+ case OPT_ATTACH_SUFFIX:
+ args->suffix = arg;
+ break;
+ case OPT_ATTACH_TIMEOUT:
+ if(!is_non_negative_num(arg)) {
+ ERROR("Error attach timeout parameter:%s.\n", arg);
+ return -1;
+ }
+ args->attach_timeout = (unsigned int)atoll(arg);
+ break;
+ case OPT_DISABLE_PTY:
+ args->disable_pty = 1;
+ break;
+ case OPT_OPEN_STDIN:
+ args->open_stdin = 1;
+ break;
+ case OPT_ADDITIONAL_GIDS:
+ if (get_attach_add_gids(arg, &args->add_gids, &args->add_gids_len) != 0) {
+ ERROR("Failed to get attach additional gids");
+ return -1;
+ }
+ break;
+#endif
}
return 0;
@@ -271,6 +462,290 @@ static int lxc_attach_create_log_file(const char *log_file)
return fd;
}
+#ifdef HAVE_ISULAD
+// isulad: send '128 + signal' if container is killed by signal.
+#define EXIT_SIGNAL_OFFSET 128
+
+/*isulad: attach with terminal*/
+static int do_attach_foreground(struct lxc_container *c, lxc_attach_command_t *command,
+ lxc_attach_options_t *attach_options,
+ char **errmsg)
+{
+ int ret = 0;
+ pid_t pid;
+ int wexit = -1;
+ int signal;
+
+ if (command->program)
+ ret = c->attach(c, lxc_attach_run_command, command, attach_options, &pid);
+ else
+ ret = c->attach(c, lxc_attach_run_shell, NULL, attach_options, &pid);
+ if (ret < 0) {
+ *errmsg = safe_strdup("Internal error, failed to call attach");
+ goto out;
+ }
+
+ ret = lxc_wait_for_pid_status(pid);
+ if (ret < 0) {
+ free(*errmsg);
+ *errmsg = safe_strdup("Internal error, failed to wait attached process");
+ goto out;
+ }
+
+ if (WIFEXITED(ret))
+ wexit = WEXITSTATUS(ret);
+ else
+ wexit = -1;
+
+ if (WIFSIGNALED(ret)) {
+ signal = WTERMSIG(ret);
+ wexit = EXIT_SIGNAL_OFFSET + signal;
+ }
+
+ WARN("Execd pid %d exit with %d", pid, wexit);
+
+out:
+ if (c->lxc_conf->errmsg) {
+ free(*errmsg);
+ *errmsg = safe_strdup(c->lxc_conf->errmsg);
+ }
+ return wexit;
+}
+
+static void close_msg_pipe(int *errpipe)
+{
+ if (errpipe[0] >= 0) {
+ close(errpipe[0]);
+ errpipe[0] = -1;
+ }
+ if (errpipe[1] >= 0) {
+ close(errpipe[1]);
+ errpipe[1] = -1;
+ }
+}
+
+/*isulad: attach without terminal in background */
+static int do_attach_background(struct lxc_container *c, lxc_attach_command_t *command,
+ lxc_attach_options_t *attach_options,
+ char **errmsg)
+{
+ int ret = 0;
+ int msgpipe[2];
+ pid_t pid = 0;
+ ssize_t size_read;
+ char msgbuf[BUFSIZ + 1] = {0};
+
+ //pipdfd for get error message of child or grandchild process.
+ if (pipe2(msgpipe, O_CLOEXEC) != 0) {
+ SYSERROR("Failed to init msgpipe");
+ return -1;
+ }
+
+ pid = fork();
+ if (pid < 0) {
+ close_msg_pipe(msgpipe);
+ return -1;
+ }
+
+ if (pid != 0) {
+ close(msgpipe[1]);
+ msgpipe[1] = -1;
+ size_read = read(msgpipe[0], msgbuf, BUFSIZ);
+ if (size_read > 0) {
+ *errmsg = safe_strdup(msgbuf);
+ ret = -1;
+ }
+
+ close(msgpipe[0]);
+ msgpipe[0] = -1;
+
+ return ret;
+ }
+
+ /* second fork to be reparented by init */
+ pid = fork();
+ if (pid < 0) {
+ SYSERROR("Error doing dual-fork");
+ close_msg_pipe(msgpipe);
+ exit(1);
+ }
+ if (pid != 0) {
+ close_msg_pipe(msgpipe);
+ exit(0);
+ }
+
+ close(msgpipe[0]);
+ msgpipe[0] = -1;
+
+ if (null_stdfds() < 0) {
+ ERROR("failed to close fds");
+ exit(1);
+ }
+ setsid();
+
+ if (command->program)
+ ret = c->attach(c, lxc_attach_run_command, command, attach_options, &pid);
+ else
+ ret = c->attach(c, lxc_attach_run_shell, NULL, attach_options, &pid);
+ if (ret < 0) {
+ if (c->lxc_conf->errmsg)
+ lxc_write_error_message(msgpipe[1], "%s", c->lxc_conf->errmsg);
+ else
+ lxc_write_error_message(msgpipe[1], "Failed to attach container");
+ close(msgpipe[1]);
+ msgpipe[1] = -1;
+ ret = -1;
+ goto out;
+ }
+
+ close(msgpipe[1]);
+ msgpipe[1] = -1;
+
+ ret = wait_for_pid(pid);
+out:
+ lxc_container_put(c);
+ if (ret)
+ exit(EXIT_FAILURE);
+ else
+ exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+ int wexit = 0;
+ struct lxc_log log;
+ char *errmsg = NULL;
+ lxc_attach_options_t attach_options = LXC_ATTACH_OPTIONS_DEFAULT;
+ lxc_attach_command_t command = (lxc_attach_command_t){.program = NULL};
+
+ if (lxc_caps_init())
+ exit(EXIT_FAILURE);
+
+ if (lxc_arguments_parse(&my_args, argc, argv))
+ exit(EXIT_FAILURE);
+
+ log.name = my_args.name;
+ log.file = my_args.log_file;
+ log.level = my_args.log_priority;
+ log.prefix = my_args.progname;
+ log.quiet = my_args.quiet;
+ log.lxcpath = my_args.lxcpath[0];
+
+ if (lxc_log_init(&log))
+ exit(EXIT_FAILURE);
+
+ if (geteuid())
+ if (access(my_args.lxcpath[0], O_RDONLY) < 0) {
+ ERROR("You lack access to %s", my_args.lxcpath[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ struct lxc_container *c = lxc_container_new(my_args.name, my_args.lxcpath[0]);
+ if (!c)
+ exit(EXIT_FAILURE);
+
+ if (my_args.rcfile) {
+ c->clear_config(c);
+ if (!c->load_config(c, my_args.rcfile)) {
+ ERROR("Failed to load rcfile");
+ lxc_container_put(c);
+ exit(EXIT_FAILURE);
+ }
+
+ c->configfile = strdup(my_args.rcfile);
+ if (!c->configfile) {
+ ERROR("Out of memory setting new config filename");
+ lxc_container_put(c);
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ if (!c->may_control(c)) {
+ ERROR("Insufficent privileges to control %s", c->name);
+ lxc_container_put(c);
+ exit(EXIT_FAILURE);
+ }
+
+ if (remount_sys_proc)
+ attach_options.attach_flags |= LXC_ATTACH_REMOUNT_PROC_SYS;
+
+ if (elevated_privileges)
+ attach_options.attach_flags &= ~(elevated_privileges);
+
+ if (my_args.terminal_fifos[0] || my_args.terminal_fifos[1] || my_args.terminal_fifos[2]) {
+ attach_options.init_fifo[0] = my_args.terminal_fifos[0];
+ attach_options.init_fifo[1] = my_args.terminal_fifos[1];
+ attach_options.init_fifo[2] = my_args.terminal_fifos[2];
+ attach_options.attach_flags |= LXC_ATTACH_TERMINAL;
+ } else if (stdfd_is_pty()) {
+ attach_options.attach_flags |= LXC_ATTACH_TERMINAL;
+ }
+
+ attach_options.namespaces = namespace_flags;
+ attach_options.personality = new_personality;
+ attach_options.env_policy = env_policy;
+ attach_options.extra_env_vars = extra_env;
+ attach_options.extra_keep_env = extra_keep;
+ attach_options.timeout = my_args.attach_timeout;
+
+ if (my_args.argc > 0) {
+ command.program = my_args.argv[0];
+ command.argv = (char**)my_args.argv;
+ }
+
+ if (my_args.console_log) {
+ attach_options.log_fd = lxc_attach_create_log_file(my_args.console_log);
+ if (attach_options.log_fd < 0) {
+ ERROR("Failed to create log file for %s", c->name);
+ lxc_container_put(c);
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ if (my_args.uid != LXC_INVALID_UID)
+ attach_options.uid = my_args.uid;
+
+ if (my_args.gid != LXC_INVALID_GID)
+ attach_options.gid = my_args.gid;
+
+ attach_options.suffix = my_args.suffix;
+
+ if (my_args.disable_pty) {
+ attach_options.disable_pty = true;
+ }
+
+ if (my_args.open_stdin) {
+ attach_options.open_stdin = true;
+ }
+
+ if (my_args.workdir) {
+ attach_options.initial_cwd = my_args.workdir;
+ }
+
+ if (my_args.add_gids) {
+ attach_options.add_gids = my_args.add_gids;
+ attach_options.add_gids_len = my_args.add_gids_len;
+ }
+
+ /* isulad: add do attach background */
+ if (attach_options.attach_flags & LXC_ATTACH_TERMINAL)
+ wexit = do_attach_foreground(c, &command, &attach_options, &errmsg);
+ else
+ wexit = do_attach_background(c, &command, &attach_options, &errmsg);
+
+ if (errmsg) {
+ fprintf(stderr, "%s:%s:%s:%d starting container process caused \"%s\"", c->name,
+ __FILE__, __func__, __LINE__, errmsg);
+ free(errmsg);
+ }
+
+ lxc_container_put(c);
+ if (wexit >= 0)
+ exit(wexit);
+
+ exit(EXIT_FAILURE);
+}
+#else
int main(int argc, char *argv[])
{
int ret = -1;
@@ -408,3 +883,4 @@ out:
exit(EXIT_FAILURE);
}
+#endif
\ No newline at end of file
diff --git a/src/lxc/tools/lxc_start.c b/src/lxc/tools/lxc_start.c
index 6d2c0ae..d30d8b8 100644
--- a/src/lxc/tools/lxc_start.c
+++ b/src/lxc/tools/lxc_start.c
@@ -26,6 +26,11 @@
#include "confile.h"
#include "log.h"
+#ifdef HAVE_ISULAD
+#include <ctype.h>
+#include "isulad_utils.h"
+#endif
+
lxc_log_define(lxc_start, lxc);
static int my_parser(struct lxc_arguments *args, int c, char *arg);
@@ -46,6 +51,16 @@ static const struct option my_longopts[] = {
{"share-ipc", required_argument, 0, OPT_SHARE_IPC},
{"share-uts", required_argument, 0, OPT_SHARE_UTS},
{"share-pid", required_argument, 0, OPT_SHARE_PID},
+#ifdef HAVE_ISULAD
+ {"in-fifo", required_argument, 0, OPT_INPUT_FIFO},
+ {"out-fifo", required_argument, 0, OPT_OUTPUT_FIFO},
+ {"err-fifo", required_argument, 0, OPT_STDERR_FIFO},
+ {"container-pidfile", required_argument, 0, OPT_CONTAINER_INFO},
+ {"exit-fifo", required_argument, 0, OPT_EXIT_FIFO},
+ {"start-timeout", required_argument, 0, OPT_START_TIMEOUT},
+ {"disable-pty", no_argument, 0, OPT_DISABLE_PTY},
+ {"open-stdin", no_argument, 0, OPT_OPEN_STDIN},
+#endif
LXC_COMMON_OPTIONS
};
@@ -68,7 +83,20 @@ Options :\n\
Note: --daemon implies --close-all-fds\n\
-s, --define KEY=VAL Assign VAL to configuration variable KEY\n\
--share-[net|ipc|uts|pid]=NAME Share a namespace with another container or pid\n\
-",
+"
+#ifdef HAVE_ISULAD
+"\
+ --in-fifo Stdin fifo path\n\
+ --out-fifo Stdout fifo path\n\
+ --err-fifo Stderr fifo path\n\
+ --container-pidfile File path for container pid\n\
+ --exit-fifo Fifo path to save exit code\n\
+ --start-timeout Timeout for start container\n\
+ --disable-pty Disable pty for attach\n\
+ --open-stdin Open stdin for attach\n\
+"
+#endif
+,
.options = my_longopts,
.parser = my_parser,
.checker = NULL,
@@ -116,6 +144,36 @@ static int my_parser(struct lxc_arguments *args, int c, char *arg)
case OPT_SHARE_PID:
args->share_ns[LXC_NS_PID] = arg;
break;
+#ifdef HAVE_ISULAD
+ case OPT_CONTAINER_INFO:
+ args->container_info = arg;
+ break;
+ case OPT_INPUT_FIFO:
+ args->terminal_fifos[0] = arg;
+ break;
+ case OPT_OUTPUT_FIFO:
+ args->terminal_fifos[1] = arg;
+ break;
+ case OPT_STDERR_FIFO:
+ args->terminal_fifos[2] = arg;
+ break;
+ case OPT_EXIT_FIFO:
+ args->exit_monitor_fifo = arg;
+ break;
+ case OPT_DISABLE_PTY:
+ args->disable_pty = 1;
+ break;
+ case OPT_OPEN_STDIN:
+ args->open_stdin = 1;
+ break;
+ case OPT_START_TIMEOUT:
+ if(!is_non_negative_num(arg)) {
+ fprintf(stderr, "Error start timeout parameter:%s.\n", arg);
+ return -1;
+ }
+ args->start_timeout = (unsigned int)atoi(arg);
+ break;
+#endif
}
return 0;
}
@@ -161,6 +219,9 @@ int main(int argc, char *argv[])
"/sbin/init",
NULL,
};
+#ifdef HAVE_ISULAD
+ char *container_info_file = NULL;
+#endif
lxc_list_init(&defines);
@@ -281,6 +342,42 @@ int main(int argc, char *argv[])
goto out;
}
+#ifdef HAVE_ISULAD
+ /* isulad: container info file used to store pid and ppid info of container*/
+ if (my_args.container_info != NULL) {
+ if (ensure_path(&container_info_file, my_args.container_info) < 0) {
+ ERROR("Failed to ensure container's piddile '%s'", my_args.container_info);
+ goto out;
+ }
+ if (!c->set_container_info_file(c, container_info_file)) {
+ ERROR("Failed to set container's piddile '%s'", container_info_file);
+ goto out;
+ }
+ }
+
+ if (my_args.terminal_fifos[0] || my_args.terminal_fifos[1] || my_args.terminal_fifos[2]) {
+ c->set_terminal_init_fifos(c, my_args.terminal_fifos[0], my_args.terminal_fifos[1], my_args.terminal_fifos[2]);
+ }
+
+ /* isulad: fifo used to monitor state of monitor process */
+ if (my_args.exit_monitor_fifo != NULL) {
+ c->exit_fifo = safe_strdup(my_args.exit_monitor_fifo);
+ }
+
+ if (my_args.disable_pty) {
+ c->want_disable_pty(c, true);
+ }
+
+ if (my_args.open_stdin) {
+ c->want_open_stdin(c, true);
+ }
+
+ /* isulad: add start timeout */
+ if(my_args.start_timeout) {
+ c->set_start_timeout(c, my_args.start_timeout);
+ }
+#endif
+
if (my_args.console)
if (!c->set_config_item(c, "lxc.console.path", my_args.console))
goto out;
@@ -303,6 +400,11 @@ int main(int argc, char *argv[])
else
err = c->start(c, 0, args) ? EXIT_SUCCESS : EXIT_FAILURE;
if (err) {
+#ifdef HAVE_ISULAD
+ if (c->lxc_conf->errmsg)
+ fprintf(stderr, "%s:%s:%s:%d starting container process caused \"%s\"", c->name,
+ __FILE__, __func__, __LINE__, c->lxc_conf->errmsg);
+#endif
ERROR("The container failed to start");
if (my_args.daemonize)
@@ -318,5 +420,8 @@ int main(int argc, char *argv[])
out:
lxc_container_put(c);
+#ifdef HAVE_ISULAD
+ free(container_info_file);
+#endif
exit(err);
}
--
2.25.1
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