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cnic: Randomize initial TCP port for iSCSI connections

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This reduces the likelihood of port re-use when re-loading the driver.

Signed-off-by: Eddie Wai <eddie.wai@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eddie Wai 2011-06-08 19:29:34 +00:00 committed by David S. Miller
parent 101c40c8cb
commit 11f23aa8cc
1 changed files with 9 additions and 5 deletions
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14
drivers/net/cnic.c
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@ -605,11 +605,12 @@ static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
}
EXPORT_SYMBOL(cnic_unregister_driver);
static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id,
u32 next)
{
id_tbl->start = start_id;
id_tbl->max = size;
id_tbl->next = 0;
id_tbl->next = next;
spin_lock_init(&id_tbl->lock);
id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
if (!id_tbl->table)
@ -3804,14 +3805,17 @@ static void cnic_cm_free_mem(struct cnic_dev *dev)
static int cnic_cm_alloc_mem(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
u32 port_id;
cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
GFP_KERNEL);
if (!cp->csk_tbl)
return -ENOMEM;
get_random_bytes(&port_id, sizeof(port_id));
port_id %= CNIC_LOCAL_PORT_RANGE;
if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
CNIC_LOCAL_PORT_MIN)) {
CNIC_LOCAL_PORT_MIN, port_id)) {
cnic_cm_free_mem(dev);
return -ENOMEM;
}
@ -4829,7 +4833,7 @@ static int cnic_start_bnx2x_hw(struct cnic_dev *dev)
pfid = cp->pfid;
ret = cnic_init_id_tbl(&cp->cid_tbl, MAX_ISCSI_TBL_SZ,
cp->iscsi_start_cid);
cp->iscsi_start_cid, 0);
if (ret)
return -ENOMEM;
@ -4837,7 +4841,7 @@ static int cnic_start_bnx2x_hw(struct cnic_dev *dev)
if (BNX2X_CHIP_IS_E2(cp->chip_id)) {
ret = cnic_init_id_tbl(&cp->fcoe_cid_tbl,
BNX2X_FCOE_NUM_CONNECTIONS,
cp->fcoe_start_cid);
cp->fcoe_start_cid, 0);
if (ret)
return -ENOMEM;