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iscsi: fix the abnormal connection exit

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the mobj is allocating from pdu_data_out_pool,
if pdu_data_out_pool is exhausted, when the pdu is
polled next time, because data_buf_len is modified,
iscsi_pdu_payload_read return -1, and the connection
will be released.

Signed-off-by: lizengwu <786436671@qq.com>
Change-Id: I3ee65472f7ddaa357d7952a5b734540f0bc0b216
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15626
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
lizengwu 2022-11-24 17:16:48 +08:00 committed by Konrad Sztyber
parent ec6d94b674
commit 93967961c8
1 changed files with 9 additions and 4 deletions
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13
lib/iscsi/iscsi.c
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@ -4614,18 +4614,20 @@ iscsi_pdu_payload_read(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
uint32_t read_len;
uint32_t crc32c;
int rc;
uint32_t data_buf_len;
data_len = pdu->data_segment_len;
read_len = data_len - pdu->data_valid_bytes;
data_buf_len = pdu->data_buf_len;
mobj = pdu->mobj[0];
if (mobj == NULL) {
if (pdu->data_buf_len <= iscsi_get_max_immediate_data_size()) {
if (data_buf_len <= iscsi_get_max_immediate_data_size()) {
pool = g_iscsi.pdu_immediate_data_pool;
pdu->data_buf_len = SPDK_BDEV_BUF_SIZE_WITH_MD(iscsi_get_max_immediate_data_size());
} else if (pdu->data_buf_len <= SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH) {
data_buf_len = SPDK_BDEV_BUF_SIZE_WITH_MD(iscsi_get_max_immediate_data_size());
} else if (data_buf_len <= SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH) {
pool = g_iscsi.pdu_data_out_pool;
pdu->data_buf_len = SPDK_BDEV_BUF_SIZE_WITH_MD(SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
data_buf_len = SPDK_BDEV_BUF_SIZE_WITH_MD(SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
} else {
SPDK_ERRLOG("Data(%d) > MaxSegment(%d)\n",
data_len, SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
@ -4635,6 +4637,9 @@ iscsi_pdu_payload_read(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
if (mobj == NULL) {
return 1;
}
pdu->data_buf_len = data_buf_len;
pdu->mobj[0] = mobj;
pdu->data = mobj->buf;
pdu->data_from_mempool = true;