[PATCH 06/15] tools lib api: Make tracing_path_strerror_open message generic

From: Jiri Olsa
Date: Wed Sep 02 2015 - 03:59:45 EST


Making tracing_path__strerror_open_tp message generic by mentioning
both debugfs/tracefs words in error message plus the tracing_path
instead of debugfs_mountpoint.

Link: http://lkml.kernel.org/n/tip-5y7nboe2xe619hp649ry58z6@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/lib/api/fs/tracing_path.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/tools/lib/api/fs/tracing_path.c b/tools/lib/api/fs/tracing_path.c
index 3b3e4f5fc50b..b0ee3b3acef0 100644
--- a/tools/lib/api/fs/tracing_path.c
+++ b/tools/lib/api/fs/tracing_path.c
@@ -90,33 +90,33 @@ static int strerror_open(int err, char *buf, size_t size, const char *filename)

switch (err) {
case ENOENT:
- if (debugfs_configured()) {
+ if (debugfs_configured() || tracefs_configured()) {
snprintf(buf, size,
"Error:\tFile %s/%s not found.\n"
"Hint:\tPerhaps this kernel misses some CONFIG_ setting to enable this feature?.\n",
- debugfs_mountpoint, filename);
+ tracing_events_path, filename);
break;
}
snprintf(buf, size, "%s",
- "Error:\tUnable to find debugfs\n"
- "Hint:\tWas your kernel compiled with debugfs support?\n"
- "Hint:\tIs the debugfs filesystem mounted?\n"
+ "Error:\tUnable to find debugfs/tracefs\n"
+ "Hint:\tWas your kernel compiled with debugfs/tracefs support?\n"
+ "Hint:\tIs the debugfs/tracefs filesystem mounted?\n"
"Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
break;
case EACCES: {
- const char *mountpoint = debugfs_mountpoint;
+ const char *mountpoint = debugfs_find_mountpoint();

- if (!access(debugfs_mountpoint, R_OK) && strncmp(filename, "tracing/", 8) == 0) {
+ if (!access(mountpoint, R_OK) && strncmp(filename, "tracing/", 8) == 0) {
const char *tracefs_mntpoint = tracefs_find_mountpoint();

if (tracefs_mntpoint)
- mountpoint = tracefs_mntpoint;
+ mountpoint = tracefs_find_mountpoint();
}

snprintf(buf, size,
"Error:\tNo permissions to read %s/%s\n"
"Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
- debugfs_mountpoint, filename, mountpoint);
+ tracing_events_path, filename, mountpoint);
}
break;
default:
@@ -131,7 +131,7 @@ int tracing_path__strerror_open_tp(int err, char *buf, size_t size, const char *
{
char path[PATH_MAX];

- snprintf(path, PATH_MAX, "tracing/events/%s/%s", sys, name ?: "*");
+ snprintf(path, PATH_MAX, "%s/%s", sys, name ?: "*");

return strerror_open(err, buf, size, path);
}
--
2.4.3

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