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>
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@ -106,6 +106,13 @@ int debugfs__strerror_open(int err, char *buf, size_t size, const char *filename
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switch (err) {
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case ENOENT:
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if (debugfs_found) {
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snprintf(buf, size,
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"Error:\tFile %s/%s not found.\n"
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"Hint:\tPerhaps this kernel misses some CONFIG_ setting to enable this feature?.\n",
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debugfs_mountpoint, filename);
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break;
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}
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snprintf(buf, size, "%s",
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"Error:\tUnable to find debugfs\n"
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"Hint:\tWas your kernel compiled with debugfs support?\n"
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