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isotpsend: add support for blocking write flag

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With the new flag 'CAN_ISOTP_WAIT_TX_DONE' the send()/write() syscall returns
when the PDU is completely passed to the CAN netdevice queue. Depending on
STmin and other settings for the tx-queue-len this does not necessarily mean
that the PDU has been completely sent on the CAN interface at that time.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
This commit is contained in:
Oliver Hartkopp
2020-10-01 20:42:50 +02:00
parent 485d813545
commit f6d963b5d9
2 changed files with 7 additions and 1 deletions
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include/linux/can/isotp.h
+1
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@@ -136,6 +136,7 @@ struct can_isotp_ll_options {
#define CAN_ISOTP_FORCE_TXSTMIN 0x080 /* ignore stmin from received FC */
#define CAN_ISOTP_FORCE_RXSTMIN 0x100 /* ignore CFs depending on rx stmin */
#define CAN_ISOTP_RX_EXT_ADDR 0x200 /* different rx extended addressing */
#define CAN_ISOTP_WAIT_TX_DONE 0x400 /* wait for tx completion */
/* default values */