Fix issue reported by Coverity.
Date: Thu, 21 Apr 2016 13:47:33 +0200
Message-Id: <1461239256-8104-2-git-send-email-michalx.k.jastrzebski at
intel.com>
X-Mailer: git-send-email 2.7.0
In-Reply-To: <1461239256-8104-1-git-send-email-michalx.k.jastrzebski at
intel.com>
References: <1461239256-8104-1-git-send-email-michalx.k.jastrzebski at
intel.com>
From: Slawomir Mrozowicz <slawomirx.mrozow...@intel.com>
Coverity ID 30690: Bad bit shift operation
large_shift: In expression 1ULL << i, left shifting by more than 63 bits
has undefined behavior. The shift amount, i, is as much as 127.
Fixes: de3cfa2c9823 ("sched: initial import")
Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz at intel.com>
---
examples/qos_sched/args.c | 84 +++++++++++++++++++++++++++++------------------
1 file changed, 52 insertions(+), 32 deletions(-)
diff --git a/examples/qos_sched/args.c b/examples/qos_sched/args.c
index 3e7fd08..cd077ba 100644
--- a/examples/qos_sched/args.c
+++ b/examples/qos_sched/args.c
@@ -53,7 +53,7 @@
static uint32_t app_master_core = 1;
static uint32_t app_numa_mask;
-static uint64_t app_used_core_mask = 0;
+static int app_used_core_mask[RTE_MAX_LCORE];
static uint64_t app_used_port_mask = 0;
static uint64_t app_used_rx_port_mask = 0;
static uint64_t app_used_tx_port_mask = 0;
@@ -115,22 +115,23 @@ static inline int str_is(const char *str, const char *is)
return strcmp(str, is) == 0;
}
-/* returns core mask used by DPDK */
-static uint64_t
-app_eal_core_mask(void)
+/* compare used core with eal configuration,
+ returns:
+ 1 if equal
+ 0 if differ */
+static int
+app_eal_core_check(void)
{
- uint32_t i;
- uint64_t cm = 0;
+ uint16_t i;
+ int ret = 1;
struct rte_config *cfg = rte_eal_get_configuration();
- for (i = 0; i < RTE_MAX_LCORE; i++) {
- if (cfg->lcore_role[i] == ROLE_RTE)
- cm |= (1ULL << i);
+ for (i = 0; i < RTE_MAX_LCORE && ret; i++) {
+ if ((cfg->lcore_role[i] == ROLE_RTE) != app_used_core_mask[i])
+ ret = 0;
}
- cm |= (1ULL << cfg->master_lcore);
-
- return cm;
+ return ret;
}
@@ -292,14 +293,9 @@ app_parse_flow_conf(const char *conf_str)
app_used_tx_port_mask |= mask;
app_used_port_mask |= mask;
- mask = 1lu << pconf->rx_core;
- app_used_core_mask |= mask;
-
- mask = 1lu << pconf->wt_core;
- app_used_core_mask |= mask;
-
- mask = 1lu << pconf->tx_core;
- app_used_core_mask |= mask;
+ app_used_core_mask[pconf->rx_core] = 1;
+ app_used_core_mask[pconf->wt_core] = 1;
+ app_used_core_mask[pconf->tx_core] = 1;
nb_pfc++;
@@ -335,7 +331,7 @@ app_parse_args(int argc, char **argv)
int option_index;
const char *optname;
char *prgname = argv[0];
- uint32_t i, nb_lcores;
+ uint16_t i, j, k, nb_lcores;
static struct option lgopts[] = {
{ "pfc", 1, 0, 0 },
@@ -349,6 +345,9 @@ app_parse_args(int argc, char **argv)
{ NULL, 0, 0, 0 }
};
+ for (i = 0; i < RTE_MAX_LCORE; i++)
+ app_used_core_mask[i] = 0;
+
/* initialize EAL first */
ret = rte_eal_init(argc, argv);
if (ret < 0)
@@ -436,19 +435,40 @@ app_parse_args(int argc, char **argv)
}
/* check master core index validity */
- for(i = 0; i <= app_master_core; i++) {
- if (app_used_core_mask & (1u << app_master_core)) {
- RTE_LOG(ERR, APP, "Master core index is not configured
properly\n");
- app_usage(prgname);
- return -1;
- }
+ if (app_used_core_mask[app_master_core] == 1) {
+ RTE_LOG(ERR, APP,
+ "Master core index is not configured properly\n");
+ app_usage(prgname);
+ return -1;
}
- app_used_core_mask |= 1u << app_master_core;
+ app_used_core_mask[app_master_core] = 1;
+
+ if ((app_eal_core_check() == 0) ||
+ (app_master_core != rte_get_master_lcore())) {
+
+ char used_hexstr[RTE_MAX_LCORE/4+1];
+ char conf_hexstr[RTE_MAX_LCORE/4+1];
+ int used_byte, conf_byte;
+ struct rte_config *cfg = rte_eal_get_configuration();
+
+ for (i = 0; i < RTE_MAX_LCORE/4; i++) {
+ used_byte = 0;
+ conf_byte = 0;
+ for (j = 0; j < 3; j++) {
+ k = 4 * (RTE_MAX_LCORE/4 - i - 1) + j;
+ used_byte += app_used_core_mask[k] << j;
+ conf_byte +=
+ ((cfg->lcore_role[k] ==
+ ROLE_RTE)?1:0) << j;
+ }
+ sprintf(&used_hexstr[i], "%1x", used_byte);
+ sprintf(&conf_hexstr[i], "%1x", used_byte);
+ }
+
+ RTE_LOG(ERR, APP, "EAL core mask not configured properly\n");
+ RTE_LOG(ERR, APP, " must be : %s\n", used_hexstr);
+ RTE_LOG(ERR, APP, " instead of: %s\n", conf_hexstr);
- if ((app_used_core_mask != app_eal_core_mask()) ||
- (app_master_core != rte_get_master_lcore())) {
- RTE_LOG(ERR, APP, "EAL core mask not configured properly, must
be %" PRIx64
- " instead of %" PRIx64 "\n" ,
app_used_core_mask, app_eal_core_mask());
return -1;
}
--
1.9.1
