Commit-ID: f816b3cc99804a9f771315331deb36abec47f5b4 Gitweb: http://git.kernel.org/tip/f816b3cc99804a9f771315331deb36abec47f5b4 Author: Arnaldo Carvalho de Melo <a...@redhat.com> AuthorDate: Thu, 22 Jan 2015 16:35:42 -0300 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Thu, 22 Jan 2015 17:02:23 -0300
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.hun...@intel.com> Cc: Borislav Petkov <b...@suse.de> Cc: David Ahern <dsah...@gmail.com> Cc: Don Zickus <dzic...@redhat.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/n/tip-6chfytoflyx3jwfqm7ebl...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/lib/api/fs/debugfs.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c index bf9e216..d2b18e8 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" -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
