[v3,3/4] eal: fix trace init fail with long file-prefix
Commit Message
Bug scenario:
1. start testpmd:
dpdk-testpmd -l 4-6 -a 0000:7d:00.0 --trace=.* \
--file-prefix=trace_autotest -- -i
2. then observed:
EAL: eal_trace_init():93 failed to initialize trace \
[No space left on device]
EAL: FATAL: Cannot init trace
EAL: Cannot init trace
EAL: Error - exiting with code: 1
The root cause it that the offset set wrong with long file-prefix and
then lead the strftime return failed.
Fixes: 321dd5f8fa62 ("trace: add internal init and fini interface")
Cc: stable@dpdk.org
Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
---
lib/eal/common/eal_common_trace_utils.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
@@ -104,7 +104,7 @@ trace_session_name_generate(char *trace_dir)
rc = rte_strscpy(trace_dir, eal_get_hugefile_prefix(),
TRACE_PREFIX_LEN);
if (rc == -E2BIG)
- rc = TRACE_PREFIX_LEN;
+ rc = TRACE_PREFIX_LEN - 1;
trace_dir[rc++] = '-';
rc = strftime(trace_dir + rc, TRACE_DIR_STR_LEN - rc,