1IBV_IS_FORK_INITIALIZED(3L)ibibverbs Programmer’s ManuaIlBV_IS_FORK_INITIALIZED(3)
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NAME

6       ibv_is_fork_initialized  - check if fork support (ibv_fork_init) is en‐
7       abled
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SYNOPSIS

10              #include <infiniband/verbs.h>
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12              enum ibv_fork_status {
13                  IBV_FORK_DISABLED,
14                  IBV_FORK_ENABLED,
15                  IBV_FORK_UNNEEDED,
16              };
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18              enum ibv_fork_status ibv_is_fork_initialized(void);
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DESCRIPTION

21       ibv_is_fork_initialized() checks whether libibverbs fork() support  was
22       enabled through the ibv_fork_init() verb.
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RETURN VALUE

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

31       The IBV_FORK_UNNEEDED return value takes precedence over  IBV_FORK_DIS‐
32       ABLED  and  IBV_FORK_ENABLED.   If the kernel supports copy-on-fork for
33       DMA pages then IBV_FORK_UNNEEDED will be returned regardless of whether
34       ibv_fork_init() was called or not.
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SEE ALSO

37       fork(2), ibv_fork_init(3)
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AUTHOR

40       Gal Pressman <galpress@amazon.com>
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44libibverbs                        2020-10-09        IBV_IS_FORK_INITIALIZED(3)
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