On Mon, Oct 27, 2008 at 10:11:28AM -0500, Yanqing_Liu@xxxxxxxx wrote:
> Hi,
>
> This patch adds a check for removed device in rdac checker. After volume
> access inquiry returns, the checker will check the peripheral qualifier
> field to see if the device is deleted/unmapped. If so, mark path as
> failed.
How does multipathd behaves when this fix is not in? Does
it still mark the path down? I would presume so, but it would take
longer (the default SCSI timeout value?)
>
> Signed off by: Yanqing Liu <Yanqing_Liu@xxxxxxxx>
>
> ---
>
> --- libcheckers/rdac.c.orig 2008-10-22 02:52:33.000000000 -0400
> +++ libcheckers/rdac.c 2008-10-17 03:43:13.000000000 -0400
> @@ -27,6 +27,7 @@
> #define MSG_RDAC_UP "rdac checker reports path is up"
> #define MSG_RDAC_DOWN "rdac checker reports path is down"
> #define MSG_RDAC_GHOST "rdac checker reports path is ghost"
> +#define MSG_RDAC_DELETED "rdac checker reports path deleted"
>
> struct rdac_checker_context {
> void * dummy;
> @@ -90,7 +91,8 @@
>
> struct volume_access_inq
> {
> - char dontcare0[8];
> + char qualifier;
> + char dontcare0[7];
> char avtcvp;
> char dontcare1[39];
> };
> @@ -104,6 +106,12 @@
> MSG(c, MSG_RDAC_DOWN);
> return PATH_DOWN;
> }
> +
> + if (0 != inq.qualifier) {
> + MSG(c, MSG_RDAC_DELETED);
> + return PATH_DOWN;
> + }
> +
>
> return ((inq.avtcvp & 0x1) ? PATH_UP : PATH_GHOST); }
>
>
>
>
> --
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> dm-devel@xxxxxxxxxx
> https://www.redhat.com/mailman/listinfo/dm-devel
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