linux-kernel - Re: [PATCH] perf vendor events: fix processing for xfs

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Date:   Wed, 14 Mar 2018 15:53:55 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     John Garry <john.garry@...wei.com>
Cc:     peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, ak@...ux.intel.com, wcohen@...hat.com,
        sukadev@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com
Subject: Re: [PATCH] perf vendor events: fix processing for xfs

Em Thu, Mar 15, 2018 at 01:10:52AM +0800, John Garry escreveu:
> In the recently introduced support for vendor subdirectory,
> the checking for directory entries under xfs (or any other fs
> which does not support dirent.d_type) is missing the check
> for links for current and parent directory. This can result
> in a broken pmu_events.c being generated.
> 
> Fix this by adding the appropriate check in is_leaf_dir().

So I'll lookup the patch that introduced the patch and squash this one
with it, so that we don't break 'git bisect' on ppc.

- Arnaldo
 
> Cc: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
> Signed-off-by: John Garry <john.garry@...wei.com>
> 
> diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
> index 1c01844..db3a594 100644
> --- a/tools/perf/pmu-events/jevents.c
> +++ b/tools/perf/pmu-events/jevents.c
> @@ -873,7 +873,10 @@ static int is_leaf_dir(const char *fpath)
>  		return 0;
>  
>  	while ((dir = readdir(d)) != NULL) {
> -		if (dir->d_type == DT_DIR && dir->d_name[0] != '.') {
> +		if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
> +			continue;
> +
> +		if (dir->d_type == DT_DIR) {
>  			res = 0;
>  			break;
>  		} else if (dir->d_type == DT_UNKNOWN) {
> -- 
> 1.9.1