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91 lines
3.2 KiB
91 lines
3.2 KiB
From: Jiri Benc <jbenc@suse.cz>
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Subject: Enable ixgbe as entropy source (disabled by default)
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References: FATE#307517
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Patch-mainline: never
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Current disk-less systems have no entropy source whatsoever. Therefore, the
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network drivers tg3, bnx2, e1000, e1000e, igb and ixgbe should be enabled to
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feed entropy to the kernel via the IRQF_SAMPLE_RANDOM flag when loaded. This
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option shall not be enabled by default but implemented via a module option to
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be activated by the administrator.
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Signed-off-by: Brandon Philips <bphilips@suse.de>
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---
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drivers/net/ixgbe/ixgbe_main.c | 22 +++++++++++++++++++---
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1 file changed, 19 insertions(+), 3 deletions(-)
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--- a/drivers/net/ixgbe/ixgbe_main.c
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+++ b/drivers/net/ixgbe/ixgbe_main.c
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@@ -56,6 +56,11 @@ static const char ixgbe_driver_string[]
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const char ixgbe_driver_version[] = DRV_VERSION;
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static char ixgbe_copyright[] = "Copyright (c) 1999-2010 Intel Corporation.";
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+static int entropy = 0;
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+module_param(entropy, int, 0);
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+MODULE_PARM_DESC(entropy, "Allow ixgbe to populate the /dev/random entropy pool");
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+
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+
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static const struct ixgbe_info *ixgbe_info_tbl[] = {
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[board_82598] = &ixgbe_82598_info,
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[board_82599] = &ixgbe_82599_info,
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@@ -2317,6 +2322,7 @@ static int ixgbe_request_msix_irqs(struc
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irqreturn_t (*handler)(int, void *);
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int i, vector, q_vectors, err;
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int ri = 0, ti = 0;
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+ int irq_flags;
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/* Decrement for Other and TCP Timer vectors */
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q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
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@@ -2334,22 +2340,27 @@ static int ixgbe_request_msix_irqs(struc
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struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
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handler = SET_HANDLER(q_vector);
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+ irq_flags = 0;
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if (handler == &ixgbe_msix_clean_rx) {
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snprintf(q_vector->name, sizeof(q_vector->name) - 1,
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"%s-%s-%d", netdev->name, "rx", ri++);
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+ if (entropy)
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+ irq_flags = IRQF_SAMPLE_RANDOM;
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} else if (handler == &ixgbe_msix_clean_tx) {
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snprintf(q_vector->name, sizeof(q_vector->name) - 1,
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"%s-%s-%d", netdev->name, "tx", ti++);
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} else if (handler == &ixgbe_msix_clean_many) {
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snprintf(q_vector->name, sizeof(q_vector->name) - 1,
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"%s-%s-%d", netdev->name, "TxRx", ri++);
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+ if (entropy)
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+ irq_flags = IRQF_SAMPLE_RANDOM;
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ti++;
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} else {
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/* skip this unused q_vector */
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continue;
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}
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err = request_irq(adapter->msix_entries[vector].vector,
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- handler, 0, q_vector->name,
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+ handler, irq_flags, q_vector->name,
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q_vector);
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if (err) {
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e_err(probe, "request_irq failed for MSIX interrupt "
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@@ -2563,14 +2574,19 @@ static int ixgbe_request_irq(struct ixgb
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{
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struct net_device *netdev = adapter->netdev;
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int err;
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+ int irq_flags = 0;
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+
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+ if (entropy)
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+ irq_flags = IRQF_SAMPLE_RANDOM;
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if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
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err = ixgbe_request_msix_irqs(adapter);
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} else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
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- err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
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+ err = request_irq(adapter->pdev->irq, ixgbe_intr, irq_flags,
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netdev->name, netdev);
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} else {
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- err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
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+ irq_flags |= IRQF_SHARED;
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+ err = request_irq(adapter->pdev->irq, ixgbe_intr, irq_flags,
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netdev->name, netdev);
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}
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