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Libiscsi: Changing header iscsi_in_pdu

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socket: need to malloc hdr

include/iscsi-private: changing iscsi_in_pdu hdr to char*
		       instead of static array for more convinient iser
		       pdu creation.

To use iscsi_in_pdu in iSER without making a copy of it
we need to change hdr to pointer from static array,
Because of that, iscsi_tcp flow need to do szmalloc (small zero malloc)
hdr when creating new iscsi_in_pdu. iscsi_in_pdu is being malloced
once per each received pdu. This change is reducing iscsi_in_pdu struct
size but adding extra allocation of the same size we reduced
from the struct.

Signed-off-by: Roy Shterman <roysh@mellanox.com>
This commit is contained in:
Roy Shterman
2016-05-27 18:47:18 +03:00
committed by Ronnie Sahlberg
parent 2671e10565
commit bc64420bad
2 changed files with 3 additions and 1 deletions
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2
include/iscsi-private.h
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@@ -55,7 +55,7 @@ struct iscsi_in_pdu {
struct iscsi_in_pdu *next;
long long hdr_pos;
unsigned char hdr[ISCSI_RAW_HEADER_SIZE + ISCSI_DIGEST_SIZE];
unsigned char *hdr;
long long data_pos;
unsigned char *data;

2
lib/socket.c
View File

@@ -549,6 +549,7 @@ iscsi_read_from_socket(struct iscsi_context *iscsi)
if (iscsi->incoming == NULL) {
iscsi->incoming = iscsi_szmalloc(iscsi, sizeof(struct iscsi_in_pdu));
iscsi->incoming->hdr = iscsi_szmalloc(iscsi, ISCSI_RAW_HEADER_SIZE + ISCSI_DIGEST_SIZE);
if (iscsi->incoming == NULL) {
iscsi_set_error(iscsi, "Out-of-memory: failed to malloc iscsi_in_pdu");
return -1;
@@ -951,6 +952,7 @@ static int iscsi_tcp_queue_pdu(struct iscsi_context *iscsi,
void
iscsi_free_iscsi_in_pdu(struct iscsi_context *iscsi, struct iscsi_in_pdu *in)
{
iscsi_free(iscsi, in->hdr);
iscsi_free(iscsi, in->data);
in->data=NULL;
iscsi_sfree(iscsi, in);