xen-netback: create a debugfs node for hash information
It is useful to be able to see the hash configuration when running tests. This patch adds a debugfs node for that purpose. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Durrant
David S. Miller
parent
c7b256f998
commit
c0c64c1523
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@ -412,4 +412,8 @@ u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len,
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void xenvif_set_skb_hash(struct xenvif *vif, struct sk_buff *skb);
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#ifdef CONFIG_DEBUG_FS
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void xenvif_dump_hash_info(struct xenvif *vif, struct seq_file *m);
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#endif
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#endif /* __XEN_NETBACK__COMMON_H__ */
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@ -369,6 +369,74 @@ u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len,
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return XEN_NETIF_CTRL_STATUS_SUCCESS;
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}
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#ifdef CONFIG_DEBUG_FS
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void xenvif_dump_hash_info(struct xenvif *vif, struct seq_file *m)
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{
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unsigned int i;
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switch (vif->hash.alg) {
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case XEN_NETIF_CTRL_HASH_ALGORITHM_TOEPLITZ:
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seq_puts(m, "Hash Algorithm: TOEPLITZ\n");
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break;
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case XEN_NETIF_CTRL_HASH_ALGORITHM_NONE:
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seq_puts(m, "Hash Algorithm: NONE\n");
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/* FALLTHRU */
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default:
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return;
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}
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if (vif->hash.flags) {
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seq_puts(m, "\nHash Flags:\n");
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if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4)
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seq_puts(m, "- IPv4\n");
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if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP)
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seq_puts(m, "- IPv4 + TCP\n");
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if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6)
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seq_puts(m, "- IPv6\n");
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if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP)
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seq_puts(m, "- IPv6 + TCP\n");
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}
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seq_puts(m, "\nHash Key:\n");
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for (i = 0; i < XEN_NETBK_MAX_HASH_KEY_SIZE; ) {
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unsigned int j, n;
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n = 8;
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if (i + n >= XEN_NETBK_MAX_HASH_KEY_SIZE)
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n = XEN_NETBK_MAX_HASH_KEY_SIZE - i;
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seq_printf(m, "[%2u - %2u]: ", i, i + n - 1);
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for (j = 0; j < n; j++, i++)
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seq_printf(m, "%02x ", vif->hash.key[i]);
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seq_puts(m, "\n");
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}
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if (vif->hash.size != 0) {
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seq_puts(m, "\nHash Mapping:\n");
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for (i = 0; i < vif->hash.size; ) {
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unsigned int j, n;
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n = 8;
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if (i + n >= vif->hash.size)
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n = vif->hash.size - i;
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seq_printf(m, "[%4u - %4u]: ", i, i + n - 1);
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for (j = 0; j < n; j++, i++)
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seq_printf(m, "%4u ", vif->hash.mapping[i]);
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seq_puts(m, "\n");
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}
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}
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}
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#endif /* CONFIG_DEBUG_FS */
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void xenvif_init_hash(struct xenvif *vif)
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{
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if (xenvif_hash_cache_size == 0)
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@ -165,7 +165,7 @@ xenvif_write_io_ring(struct file *filp, const char __user *buf, size_t count,
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return count;
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}
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static int xenvif_dump_open(struct inode *inode, struct file *filp)
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static int xenvif_io_ring_open(struct inode *inode, struct file *filp)
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{
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int ret;
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void *queue = NULL;
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@ -179,13 +179,35 @@ static int xenvif_dump_open(struct inode *inode, struct file *filp)
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static const struct file_operations xenvif_dbg_io_ring_ops_fops = {
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.owner = THIS_MODULE,
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.open = xenvif_dump_open,
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.open = xenvif_io_ring_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.write = xenvif_write_io_ring,
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};
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static int xenvif_read_ctrl(struct seq_file *m, void *v)
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{
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struct xenvif *vif = m->private;
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xenvif_dump_hash_info(vif, m);
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return 0;
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}
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static int xenvif_ctrl_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, xenvif_read_ctrl, inode->i_private);
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}
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static const struct file_operations xenvif_dbg_ctrl_ops_fops = {
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.owner = THIS_MODULE,
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.open = xenvif_ctrl_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static void xenvif_debugfs_addif(struct xenvif *vif)
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{
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struct dentry *pfile;
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@ -210,6 +232,17 @@ static void xenvif_debugfs_addif(struct xenvif *vif)
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pr_warn("Creation of io_ring file returned %ld!\n",
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PTR_ERR(pfile));
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}
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if (vif->ctrl_task) {
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pfile = debugfs_create_file("ctrl",
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S_IRUSR,
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vif->xenvif_dbg_root,
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vif,
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&xenvif_dbg_ctrl_ops_fops);
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if (IS_ERR_OR_NULL(pfile))
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pr_warn("Creation of ctrl file returned %ld!\n",
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PTR_ERR(pfile));
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}
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} else
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netdev_warn(vif->dev,
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"Creation of vif debugfs dir returned %ld!\n",
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