This can avoid IO while configuring the path prioritizer. The alua prioritizer avoids reading from sysfs for a reason (see commit 7e2f46d3), but this applies only to RTPG / STPG, not to INQUIRY calls.
Cc: [email protected] Cc: NetApp RDAC team <[email protected]> Cc: Hannes Reinecke <[email protected]> Signed-off-by: Martin Wilck <[email protected]> --- libmultipath/prioritizers/alua_rtpg.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/libmultipath/prioritizers/alua_rtpg.c b/libmultipath/prioritizers/alua_rtpg.c index d9215a88..271a019d 100644 --- a/libmultipath/prioritizers/alua_rtpg.c +++ b/libmultipath/prioritizers/alua_rtpg.c @@ -188,6 +188,23 @@ retry: int do_inquiry(const struct path *pp, int evpd, unsigned int codepage, void *resp, int resplen, unsigned int timeout) { + struct udev_device *ud; + + ud = udev_device_get_parent_with_subsystem_devtype(pp->udev, "scsi", + "scsi_device"); + if (ud != NULL) { + int rc; + + if (!evpd) + rc = sysfs_get_inquiry(ud, resp, resplen); + else + rc = sysfs_get_vpd(ud, codepage, resp, resplen); + + if (rc >= 0) { + PRINT_HEX((unsigned char *) resp, resplen); + return 0; + } + } return do_inquiry_sg(pp->fd, evpd, codepage, resp, resplen, timeout); } -- 2.21.0 -- dm-devel mailing list [email protected] https://www.redhat.com/mailman/listinfo/dm-devel
