fix: command handling: do not check domain for commands not requiring domain

[lttng-tools.git] / src / bin / lttng-sessiond / main.c

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index 283868970f74e9eb2317e9a7e883c99d3b55f8bf..d78b0956398be291f9e93aa7c42c17405619fa80 100644 (file)
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -17,7 +17,6 @@
  */
 
 #define _GNU_SOURCE
-#include <fcntl.h>
 #include <getopt.h>
 #include <grp.h>
 #include <limits.h>
@@ -40,6 +39,7 @@
 
 #include <common/common.h>
 #include <common/compat/poll.h>
+#include <common/compat/socket.h>
 #include <common/defaults.h>
 #include <common/kernel-consumer/kernel-consumer.h>
 #include <common/ust-consumer/ust-consumer.h>
@@ -295,14 +295,22 @@ static gid_t allowed_group(void)
  */
 static int init_thread_quit_pipe(void)
 {
-       int ret;
+       int ret, i;
 
-       ret = pipe2(thread_quit_pipe, O_CLOEXEC);
+       ret = pipe(thread_quit_pipe);
        if (ret < 0) {
-               perror("thread quit pipe");
+               PERROR("thread quit pipe");
                goto error;
        }
 
+       for (i = 0; i < 2; i++) {
+               ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC);
+               if (ret < 0) {
+                       PERROR("fcntl");
+                       goto error;
+               }
+       }
+
 error:
        return ret;
 }
@@ -2872,11 +2880,12 @@ error:
 /*
  * Command LTTNG_CREATE_SESSION processed by the client thread.
  */
-static int cmd_create_session(char *name, char *path, struct ucred *creds)
+static int cmd_create_session(char *name, char *path, lttng_sock_cred *creds)
 {
        int ret;
 
-       ret = session_create(name, path, creds->uid, creds->gid);
+       ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds),
+                       LTTNG_SOCK_GET_GID_CRED(creds));
        if (ret != LTTCOMM_OK) {
                goto error;
        }
@@ -3126,10 +3135,24 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
 {
        int ret = LTTCOMM_OK;
        int need_tracing_session = 1;
+       int need_domain;
 
        DBG("Processing client command %d", cmd_ctx->lsm->cmd_type);
 
-       if (opt_no_kernel && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) {
+       switch (cmd_ctx->lsm->cmd_type) {
+       case LTTNG_CREATE_SESSION:
+       case LTTNG_DESTROY_SESSION:
+       case LTTNG_LIST_SESSIONS:
+       case LTTNG_LIST_DOMAINS:
+       case LTTNG_START_TRACE:
+       case LTTNG_STOP_TRACE:
+               need_domain = 0;
+       default:
+               need_domain = 1;
+       }
+
+       if (opt_no_kernel && need_domain
+                       && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) {
                ret = LTTCOMM_KERN_NA;
                goto error;
        }
@@ -3157,8 +3180,8 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
 
        /* Commands that DO NOT need a session. */
        switch (cmd_ctx->lsm->cmd_type) {
-       case LTTNG_CALIBRATE:
        case LTTNG_CREATE_SESSION:
+       case LTTNG_CALIBRATE:
        case LTTNG_LIST_SESSIONS:
        case LTTNG_LIST_TRACEPOINTS:
                need_tracing_session = 0;
@@ -3183,6 +3206,9 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
                break;
        }
 
+       if (!need_domain) {
+               goto skip_domain;
+       }
        /*
         * Check domain type for specific "pre-action".
         */
@@ -3276,6 +3302,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
        default:
                break;
        }
+skip_domain:
 
        /*
         * Check that the UID or GID match that of the tracing session.
@@ -3283,7 +3310,8 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
         */
        if (need_tracing_session) {
                if (!session_access_ok(cmd_ctx->session,
-                               cmd_ctx->creds.uid, cmd_ctx->creds.gid)) {
+                               LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds),
+                               LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) {
                        ret = LTTCOMM_EPERM;
                        goto error;
                }
@@ -3476,7 +3504,9 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
                unsigned int nr_sessions;
 
                session_lock_list();
-               nr_sessions = lttng_sessions_count(cmd_ctx->creds.uid, cmd_ctx->creds.gid);
+               nr_sessions = lttng_sessions_count(
+                               LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds),
+                               LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds));
 
                ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions);
                if (ret < 0) {
@@ -3486,7 +3516,8 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
 
                /* Filled the session array */
                list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload),
-                       cmd_ctx->creds.uid, cmd_ctx->creds.gid);
+                       LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds),
+                       LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds));
 
                session_unlock_list();
 
@@ -3980,7 +4011,24 @@ end:
  */
 static int create_kernel_poll_pipe(void)
 {
-       return pipe2(kernel_poll_pipe, O_CLOEXEC);
+       int ret, i;
+
+       ret = pipe(kernel_poll_pipe);
+       if (ret < 0) {
+               PERROR("kernel poll pipe");
+               goto error;
+       }
+
+       for (i = 0; i < 2; i++) {
+               ret = fcntl(kernel_poll_pipe[i], F_SETFD, FD_CLOEXEC);
+               if (ret < 0) {
+                       PERROR("fcntl kernel_poll_pipe");
+                       goto error;
+               }
+       }
+
+error:
+       return ret;
 }
 
 /*
@@ -3988,7 +4036,24 @@ static int create_kernel_poll_pipe(void)
  */
 static int create_apps_cmd_pipe(void)
 {
-       return pipe2(apps_cmd_pipe, O_CLOEXEC);
+       int ret, i;
+
+       ret = pipe(apps_cmd_pipe);
+       if (ret < 0) {
+               PERROR("apps cmd pipe");
+               goto error;
+       }
+
+       for (i = 0; i < 2; i++) {
+               ret = fcntl(apps_cmd_pipe[i], F_SETFD, FD_CLOEXEC);
+               if (ret < 0) {
+                       PERROR("fcntl apps_cmd_pipe");
+                       goto error;
+               }
+       }
+
+error:
+       return ret;
 }
 
 /*