apsh_containers_get_sample.c

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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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 */
 
#include <doca_apsh.h>
#include <doca_log.h>
 
#include "apsh_common.h"
 
DOCA_LOG_REGISTER(CONTAINERS_GET);
 
/*
 * Calls the DOCA APSH API function that matches this sample name and prints the result
 *
 * @dma_device_name [in]: IBDEV Name of the device to use for DMA
 * @pci_vuid [in]: VUID of the device exposed to the target system
 * @os_type [in]: Indicates the OS type of the target system
 * @pid [in]: PID of the target process
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise
 */
doca_error_t containers_get(const char *dma_device_name,
                const char *pci_vuid,
                enum doca_apsh_system_os os_type,
                const char *mem_region,
                const char *os_symbols)
{
    doca_error_t result;
    int i;
    struct doca_apsh_ctx *apsh_ctx;
    struct doca_apsh_system *sys;
    struct doca_apsh_process **processes;
    int num_containers, num_processes;
    struct doca_apsh_container **containers_list;
 
    /* Init */
    result = init_doca_apsh(dma_device_name, &apsh_ctx);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init the DOCA APSH lib");
        return result;
    }
    DOCA_LOG_INFO("DOCA APSH lib context init successful");
 
    result = init_doca_apsh_system(apsh_ctx, os_type, os_symbols, mem_region, pci_vuid, &sys);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init the system context");
        return result;
    }
    DOCA_LOG_INFO("DOCA APSH system context created");
 
    result = doca_apsh_containers_get(sys, &containers_list, &num_containers);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to read containers info from host");
        cleanup_doca_apsh(apsh_ctx, sys);
        return result;
    }
 
    DOCA_LOG_INFO("Successfully performed %s. Host system contains %d containers", __func__, num_containers);
 
    for (i = 0; i < num_containers; ++i) {
        const char *container_id = doca_apsh_container_info_get(containers_list[i], DOCA_APSH_CONTAINER_ID);
 
        DOCA_LOG_INFO("\tContainer %d  -  id: %s", i, container_id);
 
        result = doca_apsh_container_processes_get(containers_list[i], &processes, &num_processes);
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to read containers info from host");
            doca_apsh_containers_free(containers_list);
            cleanup_doca_apsh(apsh_ctx, sys);
            return result;
        }
        DOCA_LOG_INFO("First 5 (or less) processes of container:");
        for (int j = 0; j < num_processes && j < 5; j++)
            DOCA_LOG_INFO("\t\tProcess %d  -  name: %s, pid: %u, pid_ns %u, mnt_ns %u, net_ns %u",
                      j,
                      doca_apsh_process_info_get(processes[j], DOCA_APSH_PROCESS_COMM),
                      doca_apsh_process_info_get(processes[j], DOCA_APSH_PROCESS_PID),
                      doca_apsh_process_info_get(processes[j], DOCA_APSH_PROCESS_LINUX_NS_PID),
                      doca_apsh_process_info_get(processes[j], DOCA_APSH_PROCESS_LINUX_NS_MNT),
                      doca_apsh_process_info_get(processes[j], DOCA_APSH_PROCESS_LINUX_NS_NET));
        doca_apsh_processes_free(processes);
    }
 
    /* Cleanup */
    doca_apsh_containers_free(containers_list);
    cleanup_doca_apsh(apsh_ctx, sys);
    return DOCA_SUCCESS;
}