Fix: handling bad channel when sending to consumer

[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 6ae374483a428019721591fc012924044eb93758..a8156cf12ed87f3f33a90f3e3fef8cf818f72420 100644 (file)
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -3126,10 +3126,25 @@ 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;
+               break;
+       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 +3172,8 @@ 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 +3198,9 @@ 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 +3294,7 @@ 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.
@@ -3913,7 +3932,7 @@ static int check_existing_daemon(void)
  * Set the tracing group gid onto the client socket.
  *
  * Race window between mkdir and chown is OK because we are going from more
- * permissive (root.root) to les permissive (root.tracing).
+ * permissive (root.root) to less permissive (root.tracing).
  */
 static int set_permissions(char *rundir)
 {
@@ -3934,6 +3953,13 @@ static int set_permissions(char *rundir)
                perror("chown");
        }
 
+       /* Ensure tracing group can search the run dir */
+       ret = chmod(rundir, S_IRWXU | S_IXGRP);
+       if (ret < 0) {
+               ERR("Unable to set permissions on %s", rundir);
+               perror("chmod");
+       }
+
        /* lttng client socket path */
        ret = chown(client_unix_sock_path, 0, gid);
        if (ret < 0) {
@@ -3993,7 +4019,7 @@ static int create_lttng_rundir(const char *rundir)
 
        DBG3("Creating LTTng run directory: %s", rundir);
 
-       ret = mkdir(rundir, S_IRWXU | S_IRWXG );
+       ret = mkdir(rundir, S_IRWXU);
        if (ret < 0) {
                if (errno != EEXIST) {
                        ERR("Unable to create %s", rundir);
@@ -4035,7 +4061,7 @@ static int set_consumer_sockets(struct consumer_data *consumer_data,
 
        DBG2("Creating consumer directory: %s", path);
 
-       ret = mkdir(path, S_IRWXU | S_IRWXG);
+       ret = mkdir(path, S_IRWXU);
        if (ret < 0) {
                if (errno != EEXIST) {
                        ERR("Failed to create %s", path);