IBV_IS_FORK_INITIALIZED(Libibverbs Programmer’s ManuIBV_IS_FORK_INITIALIZED(3)
NAME
ibv_is_fork_initialized - check if fork support (ibv_fork_init) is en-
abled
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_DIS-
ABLED 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)
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