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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | AUTHORS | COLOPHON |
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IBV_CREATE_AH(3) Libibverbs Programmer's Manual IBV_CREATE_AH(3)
ibv_create_ah, ibv_destroy_ah - create or destroy an address
handle (AH)
#include <infiniband/verbs.h>
struct ibv_ah *ibv_create_ah(struct ibv_pd *pd,
struct ibv_ah_attr *attr);
int ibv_destroy_ah(struct ibv_ah *ah);
ibv_create_ah() creates an address handle (AH) associated with
the protection domain pd. The argument attr is an ibv_ah_attr
struct, as defined in <infiniband/verbs.h>.
struct ibv_ah_attr {
struct ibv_global_route grh; /* Global Routing Header (GRH) attributes */
uint16_t dlid; /* Destination LID */
uint8_t sl; /* Service Level */
uint8_t src_path_bits; /* Source path bits */
uint8_t static_rate; /* Maximum static rate */
uint8_t is_global; /* GRH attributes are valid */
uint8_t port_num; /* Physical port number */
};
struct ibv_global_route {
union ibv_gid dgid; /* Destination GID or MGID */
uint32_t flow_label; /* Flow label */
uint8_t sgid_index; /* Source GID index */
uint8_t hop_limit; /* Hop limit */
uint8_t traffic_class; /* Traffic class */
};
ibv_destroy_ah() destroys the AH ah.
ibv_create_ah() returns a pointer to the created AH, or NULL if
the request fails.
If port flag IBV_QPF_GRH_REQUIRED is set then ibv_create_ah()
must be created with definition of 'struct ibv_ah_attr {
.is_global = 1; .grh = {...}; }'.
ibv_destroy_ah() returns 0 on success, or the value of errno on
failure (which indicates the failure reason).
ibv_alloc_pd(3), ibv_init_ah_from_wc(3), ibv_create_ah_from_wc(3)
Dotan Barak <dotanba@gmail.com>
This page is part of the rdma-core (RDMA Core Userspace Libraries
and Daemons) project. Information about the project can be found
at ⟨https://github.com/linux-rdma/rdma-core⟩. If you have a bug
report for this manual page, send it to
linux-rdma@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2024-06-14. (At
that time, the date of the most recent commit that was found in
the repository was 2024-06-10.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
libibverbs 2006-10-31 IBV_CREATE_AH(3)
Pages that refer to this page: ibv_alloc_pd(3), ibv_create_ah_from_wc(3), ibv_modify_qp(3), ibv_post_send(3), ibv_query_port(3), ibv_query_qp(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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