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SOCKET use readv/writev to write directly into iovectors

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This patch adds support for read/writev to directly read and write
from/to iovectors. Before this patch on read and write from/to socket
the operation was limited by the iovec boundaries. If there is enough
data in the buffer or enough buffer space available its now possible
to transfer the whole data in one atomic operaion.

Signed-off-by: Peter Lieven <pl@kamp.de>
This commit is contained in:
Peter Lieven
2012-12-10 19:24:28 +01:00
parent 752c0ad396
commit 446b1829c8
4 changed files with 124 additions and 85 deletions
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5
include/iscsi-private.h
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@@ -290,9 +290,8 @@ int iscsi_send_target_nop_out(struct iscsi_context *iscsi, uint32_t ttt);
void iscsi_set_error(struct iscsi_context *iscsi, const char *error_string,
...) __attribute__((format(printf, 2, 3)));
unsigned char *iscsi_get_user_in_buffer(struct iscsi_context *iscsi, struct iscsi_in_pdu *in, uint32_t pos, ssize_t *count);
unsigned char *iscsi_get_user_out_buffer(struct iscsi_context *iscsi, struct iscsi_pdu *pdu, uint32_t pos, ssize_t *count);
struct scsi_iovector *iscsi_get_scsi_task_iovector_in(struct iscsi_context *iscsi, struct iscsi_in_pdu *in);
struct scsi_iovector *iscsi_get_scsi_task_iovector_out(struct iscsi_context *iscsi, struct iscsi_pdu *pdu);
inline void* iscsi_malloc(struct iscsi_context *iscsi, size_t size);
inline void* iscsi_zmalloc(struct iscsi_context *iscsi, size_t size);