If some entry was not provided in section, it will be segment fault
in original impl. For example:
        dpdk-test-dma-perf --config ./config.ini
        config file parsing...
        Segmentation fault (core dumped)

This commit support specific error information, the new output (e.g.):
        dpdk-test-dma-perf --config ./config.ini
        config file parsing...
        Error: can't get entry 'dst_numa_node' in section 'case1'

Signed-off-by: Chengwen Feng <fengcheng...@huawei.com>
---
 app/test-dma-perf/main.c | 67 +++++++++++++++-------------------------
 1 file changed, 25 insertions(+), 42 deletions(-)

diff --git a/app/test-dma-perf/main.c b/app/test-dma-perf/main.c
index d8d1e3d3f8..9d17212d4c 100644
--- a/app/test-dma-perf/main.c
+++ b/app/test-dma-perf/main.c
@@ -158,6 +158,18 @@ run_test(uint32_t case_id, struct test_configure *case_cfg)
        }
 }
 
+/* Exit process if the entry couldn't find in the section. */
+static const char *
+get_cfgfile_entry(struct rte_cfgfile *cfgfile, const char *section_name, const 
char *entry_name)
+{
+       const char *entry = rte_cfgfile_get_entry(cfgfile, section_name, 
entry_name);
+       if (entry == NULL) {
+               printf("Error: can't get entry '%s' in section '%s'\n", 
entry_name, section_name);
+               exit(1);
+       }
+       return entry;
+}
+
 static int
 parse_lcore(struct test_configure *test_case, const char *value)
 {
@@ -165,9 +177,6 @@ parse_lcore(struct test_configure *test_case, const char 
*value)
        char *input;
        struct lcore_dma_map_t *lcore_dma_map;
 
-       if (test_case == NULL || value == NULL)
-               return -1;
-
        len = strlen(value);
        input = (char *)malloc((len + 1) * sizeof(char));
        strlcpy(input, value, len + 1);
@@ -195,9 +204,7 @@ static void
 parse_cpu_config(struct test_configure *test_case, int case_id,
                     struct rte_cfgfile *cfgfile, char *section_name)
 {
-       const char *lcore;
-
-       lcore = rte_cfgfile_get_entry(cfgfile, section_name, "lcore");
+       const char *lcore = get_cfgfile_entry(cfgfile, section_name, "lcore");
        int lcore_ret = parse_lcore(test_case, lcore);
        if (lcore_ret < 0) {
                printf("parse lcore error in case %d.\n", case_id);
@@ -213,9 +220,6 @@ parse_entry(const char *value, struct test_configure_entry 
*entry)
        int args_nr = -1;
        int ret;
 
-       if (value == NULL || entry == NULL)
-               goto out;
-
        strncpy(input, value, 254);
        if (*input == '\0')
                goto out;
@@ -294,7 +298,7 @@ parse_dma_config(struct test_configure *test_case, int 
case_id,
        int args_nr;
        int i;
 
-       ring_size_str = rte_cfgfile_get_entry(cfgfile, section_name, 
"dma_ring_size");
+       ring_size_str = get_cfgfile_entry(cfgfile, section_name, 
"dma_ring_size");
        args_nr = parse_entry(ring_size_str, &test_case->ring_size);
        if (args_nr < 0) {
                printf("parse error in case %d.\n", case_id);
@@ -305,13 +309,11 @@ parse_dma_config(struct test_configure *test_case, int 
case_id,
 
        src_sges_str = rte_cfgfile_get_entry(cfgfile, section_name, 
"dma_src_sge");
        if (src_sges_str != NULL)
-               test_case->nb_src_sges = 
(int)atoi(rte_cfgfile_get_entry(cfgfile,
-                                               section_name, "dma_src_sge"));
+               test_case->nb_src_sges = (int)atoi(src_sges_str);
 
        dst_sges_str = rte_cfgfile_get_entry(cfgfile, section_name, 
"dma_dst_sge");
        if (dst_sges_str != NULL)
-               test_case->nb_dst_sges = 
(int)atoi(rte_cfgfile_get_entry(cfgfile,
-                                               section_name, "dma_dst_sge"));
+               test_case->nb_dst_sges = (int)atoi(dst_sges_str);
 
        if ((src_sges_str != NULL && dst_sges_str == NULL) ||
            (src_sges_str == NULL && dst_sges_str != NULL)) {
@@ -327,7 +329,7 @@ parse_dma_config(struct test_configure *test_case, int 
case_id,
                test_case->is_sg = true;
        }
 
-       kick_batch_str = rte_cfgfile_get_entry(cfgfile, section_name, 
"kick_batch");
+       kick_batch_str = get_cfgfile_entry(cfgfile, section_name, "kick_batch");
        args_nr = parse_entry(kick_batch_str, &test_case->kick_batch);
        if (args_nr < 0) {
                printf("parse error in case %d.\n", case_id);
@@ -384,11 +386,7 @@ parse_global_config(struct rte_cfgfile *cfgfile)
                return -1;
        }
 
-       entry = rte_cfgfile_get_entry(cfgfile, GLOBAL_SECTION_NAME, "eal_args");
-       if (entry == NULL) {
-               printf("Error: GLOBAL section must have 'eal_args' entry!\n");
-               return -1;
-       }
+       entry = get_cfgfile_entry(cfgfile, GLOBAL_SECTION_NAME, "eal_args");
        args = strdup(entry);
        if (args == NULL) {
                printf("Error: dup GLOBAL 'eal_args' failed!\n");
@@ -399,18 +397,10 @@ parse_global_config(struct rte_cfgfile *cfgfile)
                global_cfg.eal_argv[i] = tokens[i];
        global_cfg.eal_argc = i;
 
-       entry = rte_cfgfile_get_entry(cfgfile, GLOBAL_SECTION_NAME, 
"cache_flush");
-       if (entry == NULL) {
-               printf("Error: GLOBAL section don't has 'cache_flush' 
entry!\n");
-               return -1;
-       }
+       entry = get_cfgfile_entry(cfgfile, GLOBAL_SECTION_NAME, "cache_flush");
        global_cfg.cache_flush = (uint8_t)atoi(entry);
 
-       entry = rte_cfgfile_get_entry(cfgfile, GLOBAL_SECTION_NAME, 
"test_seconds");
-       if (entry == NULL) {
-               printf("Error: GLOBAL section don't has 'test_seconds' 
entry!\n");
-               return -1;
-       }
+       entry = get_cfgfile_entry(cfgfile, GLOBAL_SECTION_NAME, "test_seconds");
        global_cfg.test_secs = (uint16_t)atoi(entry);
 
        return 0;
@@ -455,14 +445,7 @@ load_configs(const char *path)
                }
 
                test_case->is_valid = true;
-               case_type = rte_cfgfile_get_entry(cfgfile, section_name, 
"type");
-               if (case_type == NULL) {
-                       printf("Error: No case type in case %d, the test will 
be finished here.\n",
-                               i + 1);
-                       test_case->is_valid = false;
-                       continue;
-               }
-
+               case_type = get_cfgfile_entry(cfgfile, section_name, "type");
                if (strcmp(case_type, DMA_MEM_COPY) == 0) {
                        test_case->test_type = TEST_TYPE_DMA_MEM_COPY;
                } else if (strcmp(case_type, CPU_MEM_COPY) == 0) {
@@ -473,12 +456,12 @@ load_configs(const char *path)
                        continue;
                }
 
-               test_case->src_numa_node = 
(int)atoi(rte_cfgfile_get_entry(cfgfile,
+               test_case->src_numa_node = (int)atoi(get_cfgfile_entry(cfgfile,
                                                                section_name, 
"src_numa_node"));
-               test_case->dst_numa_node = 
(int)atoi(rte_cfgfile_get_entry(cfgfile,
+               test_case->dst_numa_node = (int)atoi(get_cfgfile_entry(cfgfile,
                                                                section_name, 
"dst_numa_node"));
                nb_vp = 0;
-               mem_size_str = rte_cfgfile_get_entry(cfgfile, section_name, 
"mem_size");
+               mem_size_str = get_cfgfile_entry(cfgfile, section_name, 
"mem_size");
                args_nr = parse_entry(mem_size_str, &test_case->mem_size);
                if (args_nr < 0) {
                        printf("parse error in case %d.\n", i + 1);
@@ -487,7 +470,7 @@ load_configs(const char *path)
                } else if (args_nr == 4)
                        nb_vp++;
 
-               buf_size_str = rte_cfgfile_get_entry(cfgfile, section_name, 
"buf_size");
+               buf_size_str = get_cfgfile_entry(cfgfile, section_name, 
"buf_size");
                args_nr = parse_entry(buf_size_str, &test_case->buf_size);
                if (args_nr < 0) {
                        printf("parse error in case %d.\n", i + 1);
-- 
2.17.1

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