udev: Add HOST_IFACE to udev rule

The HOST_IFACE only applies to TCP connections. When provided, it forces TCP
connections on a specific interface instead of letting the routing table
decide. Some users may prefer to force connections on specific interfaces
instead of configuring the routing table. This change makes sure that the
HOST_IFACE used to set up the persistent connection to the discovery
controller also gets applied to the I/O controller connections.

Signed-off-by: Martin Belanger <martin.belanger@dell.com>

diff --git a/nvmf-autoconnect/udev-rules/70-nvmf-autoconnect.rules.in b/nvmf-autoconnect/udev-rules/70-nvmf-autoconnect.rules.in
index 434cc080ffe39ba2dc807465f35e5f26a35906bf..e2f19f30d1ef2612052c6c4c45f4c2e3e6ef0ea1 100644 (file)
--- a/nvmf-autoconnect/udev-rules/70-nvmf-autoconnect.rules.in
+++ b/nvmf-autoconnect/udev-rules/70-nvmf-autoconnect.rules.in
@@ -4,16 +4,22 @@
 #   controller and connect to elements in the discovery log.
 #
 #
+ACTION!="change", GOTO="autoconnect_end"
+
+# For backwards compatibility. Make sure HOST_IFACE is not an empty string.
+ENV{NVME_HOST_IFACE}=="", ENV{NVME_HOST_IFACE}="none"
 
 # Events from persistent discovery controllers or nvme-fc transport events
 # NVME_AEN:
 #   type 0x2 (NOTICE) info 0xf0 (DISCOVERY_LOG_CHANGE) log-page-id 0x70 (DISCOVERY_LOG_PAGE)
 ACTION=="change", SUBSYSTEM=="nvme", ENV{NVME_AEN}=="0x70f002",\
   ENV{NVME_TRTYPE}=="*", ENV{NVME_TRADDR}=="*", \
-  ENV{NVME_TRSVCID}=="*", ENV{NVME_HOST_TRADDR}=="*", \
-  RUN+="@SYSTEMCTL@ --no-block start nvmf-connect@--device=$kernel\t--transport=$env{NVME_TRTYPE}\t--traddr=$env{NVME_TRADDR}\t--trsvcid=$env{NVME_TRSVCID}\t--host-traddr=$env{NVME_HOST_TRADDR}.service"
+  ENV{NVME_TRSVCID}=="*", ENV{NVME_HOST_TRADDR}=="*", ENV{NVME_HOST_IFACE}=="*", \
+  RUN+="@SYSTEMCTL@ --no-block start nvmf-connect@--device=$kernel\t--transport=$env{NVME_TRTYPE}\t--traddr=$env{NVME_TRADDR}\t--trsvcid=$env{NVME_TRSVCID}\t--host-traddr=$env{NVME_HOST_TRADDR}\t--host-iface=$env{NVME_HOST_IFACE}.service"
 
 # nvme-fc transport generated events (old-style for compatibility)
 ACTION=="change", SUBSYSTEM=="fc", ENV{FC_EVENT}=="nvmediscovery", \
   ENV{NVMEFC_HOST_TRADDR}=="*",  ENV{NVMEFC_TRADDR}=="*", \
   RUN+="@SYSTEMCTL@ --no-block start nvmf-connect@--device=none\t--transport=fc\t--traddr=$env{NVMEFC_TRADDR}\t--trsvcid=none\t--host-traddr=$env{NVMEFC_HOST_TRADDR}.service"
+
+LABEL="autoconnect_end"