[lttng-dev] [PATCH lttng-modules stable-2.10] fix: missing 'lttng_fs_info_fsid' wrapper in btrfs backport

[Mathieu Desnoyers]

Merged, thanks!

Mathieu

----- On Dec 11, 2019, at 3:29 PM, Michael Jeanson mjeanson at efficios.com wrote:

> The following backported patch was missing the use of the
> 'lttng_fs_info_fsid' wrapper to enable compatibility with upstream
> stable kernels.
> 
>  commit 065436fd07d58a9a17427ad386ffcc8d29e25a9d
>  Author: Michael Jeanson <mjeanson at efficios.com>
>  Date:   Mon Jun 18 14:53:18 2018 -0400
> 
>    Fix: btrfs: use fs_info for btrfs_handle_em_exist tracepoint
> 
>    See upstream commit:
> 
>      commit f46b24c9457143a367c6707eac82d546e2bcf280
>      Author: David Sterba <dsterba at suse.com>
>      Date:   Tue Apr 3 21:45:57 2018 +0200
> 
>        btrfs: use fs_info for btrfs_handle_em_exist tracepoint
> 
>        We really want to know to which filesystem the extent map events belong,
>        but as it cannot be reached from the extent_map pointers, we need to
>        pass it down the callchain.
> 
>    Signed-off-by: Michael Jeanson <mjeanson at efficios.com>
>    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
> 
> Signed-off-by: Michael Jeanson <mjeanson at efficios.com>
> ---
> instrumentation/events/lttng-module/btrfs.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/instrumentation/events/lttng-module/btrfs.h
> b/instrumentation/events/lttng-module/btrfs.h
> index fbedd6c..c8c494a 100644
> --- a/instrumentation/events/lttng-module/btrfs.h
> +++ b/instrumentation/events/lttng-module/btrfs.h
> @@ -318,7 +318,7 @@ LTTNG_TRACEPOINT_EVENT(btrfs_handle_em_exist,
> 	TP_ARGS(fs_info, existing, map, start, len),
> 
> 	TP_FIELDS(
> -		ctf_array(u8, fsid, fs_info->fsid, BTRFS_UUID_SIZE)
> +		ctf_array(u8, fsid, lttng_fs_info_fsid, BTRFS_UUID_SIZE)
> 		ctf_integer(u64, e_start, existing->start)
> 		ctf_integer(u64, e_len, existing->len)
> 		ctf_integer(u64, map_start, map->start)
> --
> 2.17.1

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com