[PATCH 13/40] staging: lustre: Dynamic LNet Configuration (DLC) show command

From: James Simmons
Date: Fri Nov 20 2015 - 18:46:05 EST

From: Amir Shehata <amir.shehata@xxxxxxxxx>

This is the fifth patch of a set of patches that enables DLC.

This patch adds the new structures which will be used
in the IOCTL communication. It also added a set of
show operations to show buffers, networks, statistics
and peer information.

Signed-off-by: Amir Shehata <amir.shehata@xxxxxxxxx>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-2456
Change-Id: I96e5cb3dcf07289c6cd1deb46f4acb3c263ae21e
Reviewed-on: http://review.whamcloud.com/8022
Reviewed-by: John L. Hammond <john.hammond@xxxxxxxxx>
Reviewed-by: Doug Oucharek <doug.s.oucharek@xxxxxxxxx>
Reviewed-by: James Simmons <uja.ornl@xxxxxxxxx>
Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx>
---
.../lustre/include/linux/libcfs/libcfs_ioctl.h | 44 +++++++-
.../staging/lustre/include/linux/lnet/lib-dlc.h | 118 ++++++++++++++++++++
.../staging/lustre/include/linux/lnet/lib-lnet.h | 5 +
drivers/staging/lustre/lnet/lnet/api-ni.c | 47 +++++++-
drivers/staging/lustre/lnet/lnet/module.c | 4 +
drivers/staging/lustre/lnet/lnet/peer.c | 61 ++++++++++
.../lustre/lustre/libcfs/linux/linux-module.c | 3 +-
drivers/staging/lustre/lustre/libcfs/module.c | 15 ++-
8 files changed, 282 insertions(+), 15 deletions(-)
create mode 100644 drivers/staging/lustre/include/linux/lnet/lib-dlc.h

diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs_ioctl.h b/drivers/staging/lustre/include/linux/libcfs/libcfs_ioctl.h
index e14788c..f24330d 100644
--- a/drivers/staging/lustre/include/linux/libcfs/libcfs_ioctl.h
+++ b/drivers/staging/lustre/include/linux/libcfs/libcfs_ioctl.h
@@ -41,7 +41,8 @@
#ifndef __LIBCFS_IOCTL_H__
#define __LIBCFS_IOCTL_H__

-#define LIBCFS_IOCTL_VERSION 0x0001000a
+#define LIBCFS_IOCTL_VERSION 0x0001000a
+#define LIBCFS_IOCTL_VERSION2 0x0001000b

struct libcfs_ioctl_hdr {
__u32 ioc_len;
@@ -87,6 +88,13 @@ do { \
data.ioc_hdr.ioc_len = sizeof(data); \
} while (0)

+#define LIBCFS_IOC_INIT_V2(data, hdr) \
+do { \
+ memset(&(data), 0, sizeof(data)); \
+ (data).hdr.ioc_version = LIBCFS_IOCTL_VERSION2; \
+ (data).hdr.ioc_len = sizeof(data); \
+} while (0)
+
struct libcfs_ioctl_handler {
struct list_head item;
int (*handle_ioctl)(unsigned int cmd, struct libcfs_ioctl_hdr *hdr);
@@ -112,9 +120,6 @@ struct libcfs_ioctl_handler {
/* lnet ioctls */
#define IOC_LIBCFS_GET_NI _IOWR('e', 50, long)
#define IOC_LIBCFS_FAIL_NID _IOWR('e', 51, long)
-#define IOC_LIBCFS_ADD_ROUTE _IOWR('e', 52, long)
-#define IOC_LIBCFS_DEL_ROUTE _IOWR('e', 53, long)
-#define IOC_LIBCFS_GET_ROUTE _IOWR('e', 54, long)
#define IOC_LIBCFS_NOTIFY_ROUTER _IOWR('e', 55, long)
#define IOC_LIBCFS_UNCONFIGURE _IOWR('e', 56, long)
#define IOC_LIBCFS_PORTALS_COMPATIBILITY _IOWR('e', 57, long)
@@ -137,7 +142,36 @@ struct libcfs_ioctl_handler {
#define IOC_LIBCFS_DEL_INTERFACE _IOWR('e', 79, long)
#define IOC_LIBCFS_GET_INTERFACE _IOWR('e', 80, long)

-#define IOC_LIBCFS_MAX_NR 80
+/*
+ * DLC Specific IOCTL numbers.
+ * In order to maintain backward compatibility with any possible external
+ * tools which might be accessing the IOCTL numbers, a new group of IOCTL
+ * number have been allocated.
+ */
+#define IOCTL_CONFIG_SIZE struct lnet_ioctl_config_data
+#define IOC_LIBCFS_ADD_ROUTE _IOWR(IOC_LIBCFS_TYPE, 81, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_DEL_ROUTE _IOWR(IOC_LIBCFS_TYPE, 82, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_GET_ROUTE _IOWR(IOC_LIBCFS_TYPE, 83, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_ADD_NET _IOWR(IOC_LIBCFS_TYPE, 84, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_DEL_NET _IOWR(IOC_LIBCFS_TYPE, 85, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_GET_NET _IOWR(IOC_LIBCFS_TYPE, 86, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_CONFIG_RTR _IOWR(IOC_LIBCFS_TYPE, 87, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_ADD_BUF _IOWR(IOC_LIBCFS_TYPE, 88, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_GET_BUF _IOWR(IOC_LIBCFS_TYPE, 89, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_GET_PEER_INFO _IOWR(IOC_LIBCFS_TYPE, 90, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_GET_LNET_STATS _IOWR(IOC_LIBCFS_TYPE, 91, \
+ IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_MAX_NR 91

static inline int libcfs_ioctl_packlen(struct libcfs_ioctl_data *data)
{
diff --git a/drivers/staging/lustre/include/linux/lnet/lib-dlc.h b/drivers/staging/lustre/include/linux/lnet/lib-dlc.h
new file mode 100644
index 0000000..b6a2e91
--- /dev/null
+++ b/drivers/staging/lustre/include/linux/lnet/lib-dlc.h
@@ -0,0 +1,118 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * GPL HEADER END
+ *
+ * Contributers:
+ * Amir Shehata
+ */
+
+#ifndef LNET_DLC_H
+#define LNET_DLC_H
+
+#include "../libcfs/libcfs_ioctl.h"
+#include "types.h"
+
+#define MAX_NUM_SHOW_ENTRIES 32
+#define LNET_MAX_STR_LEN 128
+#define LNET_MAX_SHOW_NUM_CPT 128
+
+struct lnet_ioctl_net_config {
+ char ni_interfaces[LNET_MAX_INTERFACES][LNET_MAX_STR_LEN];
+ __u32 ni_status;
+ __u32 ni_cpts[LNET_MAX_SHOW_NUM_CPT];
+};
+
+#define LNET_TINY_BUF_IDX 0
+#define LNET_SMALL_BUF_IDX 1
+#define LNET_LARGE_BUF_IDX 2
+
+/* # different router buffer pools */
+#define LNET_NRBPOOLS (LNET_LARGE_BUF_IDX + 1)
+
+struct lnet_ioctl_pool_cfg {
+ struct {
+ __u32 pl_npages;
+ __u32 pl_nbuffers;
+ __u32 pl_credits;
+ __u32 pl_mincredits;
+ } pl_pools[LNET_NRBPOOLS];
+ __u32 pl_routing;
+};
+
+struct lnet_ioctl_config_data {
+ struct libcfs_ioctl_hdr cfg_hdr;
+
+ __u32 cfg_net;
+ __u32 cfg_count;
+ __u64 cfg_nid;
+ __u32 cfg_ncpts;
+
+ union {
+ struct {
+ __u32 rtr_hop;
+ __u32 rtr_priority;
+ __u32 rtr_flags;
+ } cfg_route;
+ struct {
+ char net_intf[LNET_MAX_STR_LEN];
+ __s32 net_peer_timeout;
+ __s32 net_peer_tx_credits;
+ __s32 net_peer_rtr_credits;
+ __s32 net_max_tx_credits;
+ __u32 net_cksum_algo;
+ __u32 net_pad;
+ } cfg_net;
+ struct {
+ __u32 buf_enable;
+ __s32 buf_tiny;
+ __s32 buf_small;
+ __s32 buf_large;
+ } cfg_buffers;
+ } cfg_config_u;
+
+ char cfg_bulk[0];
+};
+
+struct lnet_ioctl_peer {
+ struct libcfs_ioctl_hdr pr_hdr;
+ __u32 pr_count;
+ __u32 pr_pad;
+ __u64 pr_nid;
+
+ union {
+ struct {
+ char cr_aliveness[LNET_MAX_STR_LEN];
+ __u32 cr_refcount;
+ __u32 cr_ni_peer_tx_credits;
+ __u32 cr_peer_tx_credits;
+ __u32 cr_peer_rtr_credits;
+ __u32 cr_peer_min_rtr_credits;
+ __u32 cr_peer_tx_qnob;
+ __u32 cr_ncpt;
+ } pr_peer_credits;
+ } pr_lnd_u;
+};
+
+struct lnet_ioctl_lnet_stats {
+ struct libcfs_ioctl_hdr st_hdr;
+ struct lnet_counters st_cntrs;
+};
+
+#endif /* LNET_DLC_H */
diff --git a/drivers/staging/lustre/include/linux/lnet/lib-lnet.h b/drivers/staging/lustre/include/linux/lnet/lib-lnet.h
index 94d0dc5..f2874e0 100644
--- a/drivers/staging/lustre/include/linux/lnet/lib-lnet.h
+++ b/drivers/staging/lustre/include/linux/lnet/lib-lnet.h
@@ -694,6 +694,11 @@ void lnet_peer_tables_cleanup(lnet_ni_t *ni);
void lnet_peer_tables_destroy(void);
int lnet_peer_tables_create(void);
void lnet_debug_peer(lnet_nid_t nid);
+int lnet_get_peers(int count, __u64 *nid, char *alivness,
+ int *ncpt, int *refcount,
+ int *ni_peer_tx_credits, int *peer_tx_credits,
+ int *peer_rtr_credits, int *peer_min_rtr_credtis,
+ int *peer_tx_qnob);

static inline void
lnet_peer_set_alive(lnet_peer_t *lp)
diff --git a/drivers/staging/lustre/lnet/lnet/api-ni.c b/drivers/staging/lustre/lnet/lnet/api-ni.c
index 9661f6a..165345c 100644
--- a/drivers/staging/lustre/lnet/lnet/api-ni.c
+++ b/drivers/staging/lustre/lnet/lnet/api-ni.c
@@ -39,6 +39,7 @@
#include <linux/ktime.h>

#include "../../include/linux/lnet/lib-lnet.h"
+#include "../../include/linux/lnet/lib-dlc.h"

#define D_LNI D_CONSOLE

@@ -1741,6 +1742,7 @@ int
LNetCtl(unsigned int cmd, void *arg)
{
struct libcfs_ioctl_data *data = arg;
+ struct lnet_ioctl_config_data *config;
lnet_process_id_t id = {0};
lnet_ni_t *ni;
int rc;
@@ -1765,16 +1767,51 @@ LNetCtl(unsigned int cmd, void *arg)
return (rc != 0) ? rc : lnet_check_routes();

case IOC_LIBCFS_DEL_ROUTE:
+ config = arg;
mutex_lock(&the_lnet.ln_api_mutex);
- rc = lnet_del_route(data->ioc_net, data->ioc_nid);
+ rc = lnet_del_route(config->cfg_net, config->cfg_nid);
mutex_unlock(&the_lnet.ln_api_mutex);
return rc;

case IOC_LIBCFS_GET_ROUTE:
- return lnet_get_route(data->ioc_count,
- &data->ioc_net, &data->ioc_count,
- &data->ioc_nid, &data->ioc_flags,
- &data->ioc_priority);
+ config = arg;
+ return lnet_get_route(config->cfg_count,
+ &config->cfg_net,
+ &config->cfg_config_u.cfg_route.rtr_hop,
+ &config->cfg_nid,
+ &config->cfg_config_u.cfg_route.rtr_flags,
+ &config->cfg_config_u.cfg_route.
+ rtr_priority);
+
+ case IOC_LIBCFS_ADD_NET:
+ return 0;
+
+ case IOC_LIBCFS_DEL_NET:
+ return 0;
+
+ case IOC_LIBCFS_GET_NET:
+ return 0;
+
+ case IOC_LIBCFS_GET_LNET_STATS:
+ {
+ struct lnet_ioctl_lnet_stats *lnet_stats = arg;
+
+ lnet_counters_get(&lnet_stats->st_cntrs);
+ return 0;
+ }
+
+ case IOC_LIBCFS_CONFIG_RTR:
+ return 0;
+
+ case IOC_LIBCFS_ADD_BUF:
+ return 0;
+
+ case IOC_LIBCFS_GET_BUF:
+ return 0;
+
+ case IOC_LIBCFS_GET_PEER_INFO:
+ return 0;
+
case IOC_LIBCFS_NOTIFY_ROUTER:
secs_passed = (ktime_get_real_seconds() - data->ioc_u64[0]);
return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
diff --git a/drivers/staging/lustre/lnet/lnet/module.c b/drivers/staging/lustre/lnet/lnet/module.c
index 0afdad0..ffc5700 100644
--- a/drivers/staging/lustre/lnet/lnet/module.c
+++ b/drivers/staging/lustre/lnet/lnet/module.c
@@ -36,6 +36,7 @@

#define DEBUG_SUBSYSTEM S_LNET
#include "../../include/linux/lnet/lib-lnet.h"
+#include "../../include/linux/lnet/lib-dlc.h"

static int config_on_load;
module_param(config_on_load, int, 0444);
@@ -95,6 +96,9 @@ lnet_ioctl(unsigned int cmd, struct libcfs_ioctl_hdr *hdr)
case IOC_LIBCFS_UNCONFIGURE:
return lnet_unconfigure();

+ case IOC_LIBCFS_ADD_NET:
+ return LNetCtl(cmd, hdr);
+
default:
/* Passing LNET_PID_ANY only gives me a ref if the net is up
* already; I'll need it to ensure the net can't go down while
diff --git a/drivers/staging/lustre/lnet/lnet/peer.c b/drivers/staging/lustre/lnet/lnet/peer.c
index bb5a0bb..1402e27 100644
--- a/drivers/staging/lustre/lnet/lnet/peer.c
+++ b/drivers/staging/lustre/lnet/lnet/peer.c
@@ -39,6 +39,7 @@
#define DEBUG_SUBSYSTEM S_LNET

#include "../../include/linux/lnet/lib-lnet.h"
+#include "../../include/linux/lnet/lib-dlc.h"

int
lnet_peer_tables_create(void)
@@ -392,3 +393,63 @@ lnet_debug_peer(lnet_nid_t nid)

lnet_net_unlock(cpt);
}
+
+int lnet_get_peers(int count, __u64 *nid, char *aliveness,
+ int *ncpt, int *refcount,
+ int *ni_peer_tx_credits, int *peer_tx_credits,
+ int *peer_rtr_credits, int *peer_min_rtr_credits,
+ int *peer_tx_qnob)
+{
+ struct lnet_peer_table *peer_table;
+ lnet_peer_t *lp;
+ int j;
+ int lncpt, found = 0;
+
+ /* get the number of CPTs */
+ lncpt = cfs_percpt_number(the_lnet.ln_peer_tables);
+
+ /*
+ * if the cpt number to be examined is >= the number of cpts in
+ * the system then indicate that there are no more cpts to examin
+ */
+ if (*ncpt > lncpt)
+ return -1;
+
+ /* get the current table */
+ peer_table = the_lnet.ln_peer_tables[*ncpt];
+ /* if the ptable is NULL then there are no more cpts to examine */
+ if (!peer_table)
+ return -1;
+
+ lnet_net_lock(*ncpt);
+
+ for (j = 0; j < LNET_PEER_HASH_SIZE && !found; j++) {
+ struct list_head *peers = &peer_table->pt_hash[j];
+
+ list_for_each_entry(lp, peers, lp_hashlist) {
+ if (count-- > 0)
+ continue;
+
+ snprintf(aliveness, LNET_MAX_STR_LEN, "NA");
+ if (lnet_isrouter(lp) ||
+ lnet_peer_aliveness_enabled(lp))
+ snprintf(aliveness, LNET_MAX_STR_LEN,
+ lp->lp_alive ? "up" : "down");
+
+ *nid = lp->lp_nid;
+ *refcount = lp->lp_refcount;
+ *ni_peer_tx_credits = lp->lp_ni->ni_peertxcredits;
+ *peer_tx_credits = lp->lp_txcredits;
+ *peer_rtr_credits = lp->lp_rtrcredits;
+ *peer_min_rtr_credits = lp->lp_mintxcredits;
+ *peer_tx_qnob = lp->lp_txqnob;
+
+ found = 1;
+ }
+ }
+ lnet_net_unlock(*ncpt);
+
+ *ncpt = lncpt;
+
+ return found ? 0 : -ENOENT;
+}
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
index ef1c247..1c31e2e 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
@@ -65,7 +65,8 @@ int libcfs_ioctl_getdata_len(const struct libcfs_ioctl_hdr __user *arg,
if (copy_from_user(&hdr, arg, sizeof(hdr)))
return -EFAULT;

- if (hdr.ioc_version != LIBCFS_IOCTL_VERSION) {
+ if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
+ hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
CERROR("LNET: version mismatch expected %#x, got %#x\n",
LIBCFS_IOCTL_VERSION, hdr.ioc_version);
return -EINVAL;
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index 5348699..992ff3c 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -54,13 +54,15 @@

# define DEBUG_SUBSYSTEM S_LNET

-#define LIBCFS_MAX_IOCTL_BUF_LEN 2048
+#define LNET_MAX_IOCTL_BUF_LEN (sizeof(struct lnet_ioctl_net_config) + \
+ sizeof(struct lnet_ioctl_config_data))

#include "../../include/linux/libcfs/libcfs.h"
#include <asm/div64.h>

#include "../../include/linux/libcfs/libcfs_crypto.h"
#include "../../include/linux/lnet/lib-lnet.h"
+#include "../../include/linux/lnet/lib-dlc.h"
#include "../../include/linux/lnet/lnet.h"
#include "tracefile.h"

@@ -249,8 +251,13 @@ static int libcfs_ioctl_handle(struct cfs_psdev_file *pfile, unsigned long cmd,
struct libcfs_ioctl_data *data = NULL;
int err = -EINVAL;

- if ((cmd <= IOC_LIBCFS_LNETST) ||
- (cmd >= IOC_LIBCFS_REGISTER_MYNID)) {
+ /*
+ * The libcfs_ioctl_data_adjust() function performs adjustment
+ * operations on the libcfs_ioctl_data structure to make
+ * it usable by the code. This doesn't need to be called
+ * for new data structures added.
+ */
+ if (hdr->ioc_version == LIBCFS_IOCTL_VERSION) {
data = container_of(hdr, struct libcfs_ioctl_data, ioc_hdr);
err = libcfs_ioctl_data_adjust(data);
if (err != 0) {
@@ -322,7 +329,7 @@ static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd, void *a
* do a check here to restrict the size of the memory
* to allocate to guard against DoS attacks.
*/
- if (buf_len > LIBCFS_MAX_IOCTL_BUF_LEN) {
+ if (buf_len > LNET_MAX_IOCTL_BUF_LEN) {
CERROR("LNET: user buffer exceeds kernel buffer\n");
return -EINVAL;
}
--
1.7.1

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