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Remove the iscsi data alloc_size field.

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Avoiding to realloc data over and over should rather be handled with something
similar to iovectors instead.
This commit is contained in:
Ronnie Sahlberg
2012-11-25 19:22:37 -08:00
parent bb755104e5
commit 9f741ad2e3
3 changed files with 10 additions and 24 deletions
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1
include/iscsi.h
View File

@@ -537,7 +537,6 @@ iscsi_task_mgmt_target_cold_reset_async(struct iscsi_context *iscsi,
struct iscsi_data {
int size;
size_t alloc_size;
unsigned char *data;
};

2
lib/iscsi-command.c
View File

@@ -438,7 +438,7 @@ iscsi_process_scsi_data_in(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
/* Dont add to reassembly buffer if we already have a user buffer */
if (scsi_task_get_data_in_buffer(task, 0, NULL) == NULL) {
if (task->expxferlen > dsl && pdu->indata.data == NULL) {
pdu->indata.alloc_size = task->expxferlen;
pdu->indata.size = task->expxferlen;
pdu->indata.data = iscsi_malloc(iscsi, task->expxferlen);
if (pdu->indata.data == NULL) {
iscsi_set_error(iscsi, "Out-of-memory: failed to allocate pdu indata buffer");

31
lib/pdu.c
View File

@@ -43,9 +43,7 @@ iscsi_allocate_pdu_with_itt_flags(struct iscsi_context *iscsi, enum iscsi_opcode
}
pdu->outdata.size = ISCSI_HEADER_SIZE;
pdu->outdata.alloc_size = 64;
pdu->outdata.data = iscsi_malloc(iscsi, pdu->outdata.alloc_size);
pdu->outdata.data = iscsi_malloc(iscsi, pdu->outdata.size);
memset(pdu->outdata.data, 0, ISCSI_HEADER_SIZE);
if (pdu->outdata.data == NULL) {
@@ -117,42 +115,31 @@ iscsi_add_data(struct iscsi_context *iscsi, struct iscsi_data *data,
}
len = data->size + dsize;
aligned = len;
if (pdualignment) {
aligned = (aligned+3)&0xfffffffc;
}
size_t new_alloc_size = data->alloc_size;
if (new_alloc_size < 64) new_alloc_size=64;
while (aligned > new_alloc_size) new_alloc_size<<=1;
if (data->data != NULL && data->alloc_size == 0) data->alloc_size=data->size;
if (data->alloc_size == 0) {
data->data = iscsi_malloc(iscsi, new_alloc_size);
if (data->size == 0) {
data->data = iscsi_malloc(iscsi, aligned);
} else {
data->data = iscsi_realloc(iscsi, data->data, aligned);
}
else
if (data->alloc_size != new_alloc_size) {
data->data = iscsi_realloc(iscsi, data->data, new_alloc_size);
}
if (data->data == NULL) {
iscsi_set_error(iscsi, "failed to allocate buffer for %d "
"bytes", (int) len);
return -1;
}
data->alloc_size = new_alloc_size;
memcpy(data->data + data->size, dptr, dsize);
data->size += dsize;
if (len != aligned) {
/* zero out any padding at the end */
memset(data->data+len, 0, aligned-len);
memset(data->data + len, 0, aligned - len);
}
data->size = len;
return 0;
}