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| author | Stefan Raspl <raspl@linux.ibm.com> | 2018-05-23 16:38:11 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-23 22:02:35 +0200 |
| commit | de8474eb9d50fd47b8c73816f34739dec5e96754 (patch) | |
| tree | 4d8c4d02508896fefba4c7172162ebf1b8333798 /net/smc/smc.h | |
| parent | net/smc: lock smc_lgr_list in port_terminate() (diff) | |
| download | linux-de8474eb9d50fd47b8c73816f34739dec5e96754.tar.xz linux-de8474eb9d50fd47b8c73816f34739dec5e96754.zip | |
net/smc: urgent data support
Add support for out of band data send and receive.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc.h')
| -rw-r--r-- | net/smc/smc.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/net/smc/smc.h b/net/smc/smc.h index a1467e411645..51ae1f10d81a 100644 --- a/net/smc/smc.h +++ b/net/smc/smc.h @@ -114,6 +114,12 @@ struct smc_host_cdc_msg { /* Connection Data Control message */ u8 reserved[18]; } __aligned(8); +enum smc_urg_state { + SMC_URG_VALID, /* data present */ + SMC_URG_NOTYET, /* data pending */ + SMC_URG_READ /* data was already read */ +}; + struct smc_connection { struct rb_node alert_node; struct smc_link_group *lgr; /* link group of connection */ @@ -160,6 +166,15 @@ struct smc_connection { union smc_host_cursor rx_curs_confirmed; /* confirmed to peer * source of snd_una ? */ + union smc_host_cursor urg_curs; /* points at urgent byte */ + enum smc_urg_state urg_state; + bool urg_tx_pend; /* urgent data staged */ + bool urg_rx_skip_pend; + /* indicate urgent oob data + * read, but previous regular + * data still pending + */ + char urg_rx_byte; /* urgent byte */ atomic_t bytes_to_rcv; /* arrived data, * not yet received */ |