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| author |   Zoltan Kiss <zoltan.kiss@citrix.com> | 2014-07-08 19:49:14 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-07-08 20:48:36 -0700 |
| commit | f51de24356e49e4dcb5095e87717065580912120 (patch) | |
| tree | 33439ff1f49a3d2d61455f0c6585b3369088b25c /drivers/net/xen-netback/common.h | |
| parent | net: provide stubs for ip6_set_txhash and ip6_make_flowlabel (diff) | |
| download | linux-dev-f51de24356e49e4dcb5095e87717065580912120.tar.xz linux-dev-f51de24356e49e4dcb5095e87717065580912120.zip | |
xen-netback: Adding debugfs "io_ring_qX" files
This patch adds debugfs capabilities to netback. There used to be a similar
patch floating around for classic kernel, but it used procfs. It is based on a
very similar blkback patch.
It creates xen-netback/[vifname]/io_ring_q[queueno] files, reading them output
various ring variables etc. Writing "kick" into it imitates an interrupt
happened, it can be useful to check whether the ring is just stalled due to a
missed interrupt.
Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: xen-devel@lists.xenproject.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netback/common.h')
| -rw-r--r-- | drivers/net/xen-netback/common.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index 2532ce85d718..28c98229e95f 100644 --- a/drivers/net/xen-netback/common.h +++ b/drivers/net/xen-netback/common.h @@ -44,6 +44,7 @@ #include <xen/interface/grant_table.h> #include <xen/grant_table.h> #include <xen/xenbus.h> +#include <linux/debugfs.h> typedef unsigned int pending_ring_idx_t; #define INVALID_PENDING_RING_IDX (~0U) @@ -224,6 +225,10 @@ struct xenvif { struct xenvif_queue *queues; unsigned int num_queues; /* active queues, resource allocated */ +#ifdef CONFIG_DEBUG_FS + struct dentry *xenvif_dbg_root; +#endif + /* Miscellaneous private stuff. */ struct net_device *dev; }; @@ -297,10 +302,16 @@ static inline pending_ring_idx_t nr_pending_reqs(struct xenvif_queue *queue) /* Callback from stack when TX packet can be released */ void xenvif_zerocopy_callback(struct ubuf_info *ubuf, bool zerocopy_success); +irqreturn_t xenvif_interrupt(int irq, void *dev_id); + extern bool separate_tx_rx_irq; extern unsigned int rx_drain_timeout_msecs; extern unsigned int rx_drain_timeout_jiffies; extern unsigned int xenvif_max_queues; +#ifdef CONFIG_DEBUG_FS +extern struct dentry *xen_netback_dbg_root; +#endif + #endif /* __XEN_NETBACK__COMMON_H__ */ |