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CIFS: SMBD: Implement function to send data via RDMA send

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The transport doesn't maintain send buffers or send queue for transferring
payload via RDMA send. There is no data copy in the transport on send.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
This commit is contained in:
Long Li
2017-11-22 17:38:42 -07:00
committed by Steve French
parent 2fef137a2e
commit d649e1bba3
2 changed files with 251 additions and 0 deletions
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5
fs/cifs/smbdirect.h
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@@ -92,6 +92,9 @@ struct smbd_connection {
/* Activity accoutning */
/* Pending reqeusts issued from upper layer */
int smbd_send_pending;
wait_queue_head_t wait_smbd_send_pending;
int smbd_recv_pending;
wait_queue_head_t wait_smbd_recv_pending;
@@ -257,6 +260,7 @@ void smbd_destroy(struct smbd_connection *info);
/* Interface for carrying upper layer I/O through send/recv */
int smbd_recv(struct smbd_connection *info, struct msghdr *msg);
int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst);
#else
#define cifs_rdma_enabled(server) 0
@@ -266,6 +270,7 @@ static inline void *smbd_get_connection(
static inline int smbd_reconnect(struct TCP_Server_Info *server) {return -1; }
static inline void smbd_destroy(struct smbd_connection *info) {}
static inline int smbd_recv(struct smbd_connection *info, struct msghdr *msg) {return -1; }
static inline int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst) {return -1; }
#endif
#endif