umad_get_issm_path (3) - Linux Manuals

umad_get_issm_path: get path of issm device

NAME

umad_get_issm_path - get path of issm device

SYNOPSIS

#include <infiniband/umad.h>

int umad_get_issm_path(char *ca_name, int portnum,char*path,intmax);

DESCRIPTION

umad_get_issm_path() resolves path to issm device (which used for setting/clearing PortInfo:CapMask IsSM bit) for portnum of the IB device ca_name , it stores resolved path in path array which cannot exceed max bytes in length (including NULL terminator). Opening issm device sets PortInfo:CapMask IsSM bit and closing clears it.

RETURN VALUE

umad_open_port() returns 0 on success and a negative value on error as follows:
 -ENODEV IB device can't be resolved
 -EINVAL port is not valid (bad portnum or no umad device)

AUTHOR

Sasha Khapyorsky <sashak [at] voltaire.com>