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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-01-22 20:35:42 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-01-22 21:02:23 +0100 |
| commit | f816b3cc99804a9f771315331deb36abec47f5b4 (patch) | |
| tree | 25868dac6f71cf91e6a2b63ef6b565b3632dd112 /tools/lib | |
| parent | tools lib fs debugfs: Introduce debugfs__strerror_open_tp (diff) | |
| download | linux-f816b3cc99804a9f771315331deb36abec47f5b4.tar.xz linux-f816b3cc99804a9f771315331deb36abec47f5b4.zip | |
tools lib fs debugfs: Check if debugfs is mounted when handling ENOENT
If debugfs was already mounted, then its a matter of not finding the
tracepoint, tell the user that perhaps a CONFIG_ setting is not enabled.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-6chfytoflyx3jwfqm7ebltu0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/api/fs/debugfs.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c index bf9e21648894..d2b18e887071 100644 --- a/tools/lib/api/fs/debugfs.c +++ b/tools/lib/api/fs/debugfs.c @@ -106,6 +106,13 @@ int debugfs__strerror_open(int err, char *buf, size_t size, const char *filename switch (err) { case ENOENT: + if (debugfs_found) { + 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); + break; + } snprintf(buf, size, "%s", "Error:\tUnable to find debugfs\n" "Hint:\tWas your kernel compiled with debugfs support?\n" |