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Subject[PATCH 3/9] NTB: Fix transport stats for multiple devices
Date
From: Dave Jiang <dave.jiang@intel.com>

Currently the debugfs does not have files for all NTB transport queue
pairs. When there are multiple NTBs present in a system, the QP names
of the last transport clobber the names of previously added transport
QPs. Only the last added QPs can be observed via debugfs.

Create a directory per NTB transport to associate the QPs with that
transport. Name the directory the same as the PCI device.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/ntb/ntb_transport.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 3c257f1d235f..30d8b52421ec 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -211,6 +211,8 @@ struct ntb_transport_ctx {
bool link_is_up;
struct delayed_work link_work;
struct work_struct link_cleanup;
+
+ struct dentry *debugfs_node_dir;
};

enum {
@@ -951,12 +953,12 @@ static int ntb_transport_init_queue(struct ntb_transport_ctx *nt,
qp->tx_max_frame = min(transport_mtu, tx_size / 2);
qp->tx_max_entry = tx_size / qp->tx_max_frame;

- if (nt_debugfs_dir) {
+ if (nt->debugfs_node_dir) {
char debugfs_name[4];

snprintf(debugfs_name, 4, "qp%d", qp_num);
qp->debugfs_dir = debugfs_create_dir(debugfs_name,
- nt_debugfs_dir);
+ nt->debugfs_node_dir);

qp->debugfs_stats = debugfs_create_file("stats", S_IRUSR,
qp->debugfs_dir, qp,
@@ -1059,6 +1061,11 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev)
goto err2;
}

+ if (nt_debugfs_dir) {
+ nt->debugfs_node_dir =
+ debugfs_create_dir(pci_name(ndev->pdev), nt_debugfs_dir);
+ }
+
for (i = 0; i < qp_count; i++) {
rc = ntb_transport_init_queue(nt, i);
if (rc)
--
2.4.0.rc0.43.gcf8a8c6


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