On 7/14/25 15:26, Harshal wrote:
Specify details in logs of failed cases

How about changing the above to:

Improve error messages adding details on failuires


Signed-off-by: Harshal <embedkari...@gmail.com>
---
v2:
- revert back to exit() instead of die() to avoid modifying system behaviour

v1: 
https://lore.kernel.org/all/c7c071ed-6a4e-4a9c-ba9d-c745fd42c...@linuxfoundation.org/
  tools/testing/selftests/firmware/fw_namespace.c | 14 +++++++-------
  1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/firmware/fw_namespace.c 
b/tools/testing/selftests/firmware/fw_namespace.c
index 04757dc7e546..5b0032498ede 100644
--- a/tools/testing/selftests/firmware/fw_namespace.c
+++ b/tools/testing/selftests/firmware/fw_namespace.c
@@ -38,7 +38,7 @@ static void trigger_fw(const char *fw_name, const char 
*sys_path)
fd = open(sys_path, O_WRONLY);
        if (fd < 0)
-               die("open failed: %s\n",
+               die("open of sys_path failed: %s\n",

Why not just use sys_path as a input parameter to die()?

                    strerror(errno));
        if (write(fd, fw_name, strlen(fw_name)) != strlen(fw_name))
                exit(EXIT_FAILURE);
@@ -52,10 +52,10 @@ static void setup_fw(const char *fw_path)
fd = open(fw_path, O_WRONLY | O_CREAT, 0600);
        if (fd < 0)
-               die("open failed: %s\n",
+               die("open of firmware file failed: %s\n",

Why not just use fw_path as a input parameter to die()?

                    strerror(errno));
        if (write(fd, fw, sizeof(fw) -1) != sizeof(fw) -1)
-               die("write failed: %s\n",
+               die("write to firmware file failed: %s\n",

Same here

                    strerror(errno));
        close(fd);
  }
@@ -66,7 +66,7 @@ static bool test_fw_in_ns(const char *fw_name, const char 
*sys_path, bool block_
if (block_fw_in_parent_ns)
                if (mount("test", "/lib/firmware", "tmpfs", MS_RDONLY, NULL) == 
-1)
-                       die("blocking firmware in parent ns failed\n");
+                       die("blocking firmware in parent namespace failed\n");
child = fork();
        if (child == -1) {
@@ -99,11 +99,11 @@ static bool test_fw_in_ns(const char *fw_name, const char 
*sys_path, bool block_
                        strerror(errno));
        }
        if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) == -1)
-               die("remount root in child ns failed\n");
+               die("remount root in child namespace failed\n");
if (!block_fw_in_parent_ns) {
                if (mount("test", "/lib/firmware", "tmpfs", MS_RDONLY, NULL) == 
-1)
-                       die("blocking firmware in child ns failed\n");
+                       die("blocking firmware in child namespace failed\n");
        } else
                umount("/lib/firmware");
@@ -129,8 +129,8 @@ int main(int argc, char **argv)
                die("error: failed to build full fw_path\n");
setup_fw(fw_path);
-

Why did you remove this line?

        setvbuf(stdout, NULL, _IONBF, 0);
+

Why is this line added

        /* Positive case: firmware in PID1 mount namespace */
        printf("Testing with firmware in parent namespace (assumed to be same file 
system as PID1)\n");
        if (!test_fw_in_ns(fw_name, sys_path, false))

The rest looks good to me.

thanks,
-- Shuah

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