Messages in this thread Patch in this message |  | | Date | Sat, 6 Oct 2018 22:32:26 +0200 | From | Eugene Syromiatnikov <> | Subject | [PATCH net 2/2] net/smc: retain old name for diag_mode field |
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Commit v4.19-rc1~140^2~285^2~4 changed the name of diag_fallback field of struct smc_diag_msg structure to diag_mode. However, this structure is a part of UAPI, and this change breaks user space applications that use it ([1], for example). Since the new name is more suitable, convert the field to a union that provides access to the data via both the new and the old name.
[1] https://gitlab.com/strace/strace/blob/v4.24/netlink_smc_diag.c#L165
Fixes: c601171d7a60 ("net/smc: provide smc mode in smc_diag.c") Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com> --- include/uapi/linux/smc_diag.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/smc_diag.h b/include/uapi/linux/smc_diag.h index 6180c6d..8cb3a6f 100644 --- a/include/uapi/linux/smc_diag.h +++ b/include/uapi/linux/smc_diag.h @@ -20,7 +20,10 @@ struct smc_diag_req { struct smc_diag_msg { __u8 diag_family; __u8 diag_state; - __u8 diag_mode; + union { + __u8 diag_mode; + __u8 diag_fallback; /* the old name of the field */ + }; __u8 diag_shutdown; struct inet_diag_sockid id; -- 2.1.4
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