IBV_IS_FORK_INITIALIZED(3)                      Libibverbs Programmer's Manual

NAME
       ibv_is_fork_initialized - check if fork support (ibv_fork_init) is
       enabled

SYNOPSIS
              #include <infiniband/verbs.h>

              enum ibv_fork_status {
                  IBV_FORK_DISABLED,
                  IBV_FORK_ENABLED,
                  IBV_FORK_UNNEEDED,
              };

              enum ibv_fork_status ibv_is_fork_initialized(void);

DESCRIPTION
       ibv_is_fork_initialized() checks whether libibverbs fork() support was
       enabled through the ibv_fork_init() verb.

RETURN VALUE
       ibv_is_fork_initialized() returns IBV_FORK_DISABLED if fork support is
       disabled, or IBV_FORK_ENABLED if enabled.  IBV_FORK_UNNEEDED return
       value indicates that the kernel copies DMA pages on fork, hence a call
       to ibv_fork_init() is unneeded.

NOTES
       The IBV_FORK_UNNEEDED return value takes precedence over
       IBV_FORK_DISABLED and IBV_FORK_ENABLED.  If the kernel supports copy-
       on-fork for DMA pages then IBV_FORK_UNNEEDED will be returned
       regardless of whether ibv_fork_init() was called or not.

SEE ALSO
       fork(2), ibv_fork_init(3)

AUTHOR
       Gal Pressman <galpress@amazon.com>

libibverbs                        2020-10-09        IBV_IS_FORK_INITIALIZED(3)