Attachment 854268 Details for Bug 1056976 – udev rules for better PATH_FAILED/PATH_REINSTATED mpath uevent handling

udev rules for better PATH_FAILED/PATH_REINSTATED mpath uevent handling

11-dm-mpath.rules (text/plain), 1.54 KB, created by Peter Rajnoha on 2014-01-23 09:43:01 UTC

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Creator: Peter Rajnoha

Created: 2014-01-23 09:43:01 UTC

Size: 1.54 KB

patch

obsolete

>ACTION!="add|change", GOTO="mpath_end"
>ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="mpath_end"
>ENV{DM_UUID}!="mpath-?*", GOTO="mpath_end"
>
># Do not initiate scanning if no path is available,
># otherwise there would be a hang or IO error on access.
># We'd like to avoid this, especially within udev processing.
>ENV{DM_NR_VALID_PATHS}!="?*", IMPORT{db}="DM_NR_VALID_PATHS"
>ENV{DM_NR_VALID_PATHS}=="0", ENV{DM_NOSCAN}="1"
>
># Also skip all foreign rules if no path is available.
># Remember the original value of DM_DISABLE_OTHER_RULES_FLAG
># and restore it back once we have at least one path available.
>IMPORT{db}="DM_DISABLE_OTHER_RULES_FLAG_OLD"
>ENV{DM_ACTION}=="PATH_FAILED",\
>	ENV{DM_NR_VALID_PATHS}=="0",\
>	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}=="",\
>	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="$env{DM_UDEV_DISABLE_OTHER_RULES_FLAG}",\
>	ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
>ENV{DM_ACTION}=="PATH_REINSTATED",\
>	ENV{DM_NR_VALID_PATHS}=="1",\
>	ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}",\
>	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="",\
>	ENV{DM_ACTIVATION}="1"
>
># DM_SUBSYSTEM_UDEV_FLAG0 is the "RELOAD" flag for multipath subsystem.
># Drop the DM_ACTIVATION flag here as mpath reloads tables if any of its
># paths are lost/recovered. For any stack above the mpath device, this is not
># something that should be reacted upon since it would be useless extra work.
># It's exactly mpath's job to provide *seamless* device access to any of the
># paths that are available underneath.
>ENV{DM_SUBSYSTEM_UDEV_FLAG0}=="1", ENV{DM_ACTIVATION}="0"
>
>LABEL="mpath_end"

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Attachments on bug 1056976: 854268 | 854270