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Date: Wed, 23 Jan 2019 15:42:28 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: Eran Ben Elisha <eranbe@...lanox.com>
Cc: netdev@...r.kernel.org, Jiri Pirko <jiri@...lanox.com>,
"David S. Miller" <davem@...emloft.net>,
Saeed Mahameed <saeedm@...lanox.com>,
Moshe Shemesh <moshe@...lanox.com>
Subject: Re: [PATCH net-next 3/7] devlink: move devlink health reporter to
use devlink msg API
Tue, Jan 22, 2019 at 04:57:20PM CET, eranbe@...lanox.com wrote:
>Move devlink reporter diagnose and dump operations to use the new msg API.
>Redefine the signature of diagnose and dump operations and move the mlx5e
>reporter to use it with the new format.
>
>Signed-off-by: Eran Ben Elisha <eranbe@...lanox.com>
>Reviewed-by: Moshe Shemesh <moshe@...lanox.com>
>---
> .../mellanox/mlx5/core/en/reporter_tx.c | 1 +
> include/net/devlink.h | 9 +-
> net/core/devlink.c | 95 +++++--------------
> 3 files changed, 28 insertions(+), 77 deletions(-)
>
>diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
>index fc92850c214a..7238cda670ba 100644
>--- a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
>+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
>@@ -264,6 +264,7 @@ static int mlx5e_tx_reporter_diagnose(struct devlink_health_reporter *reporter,
> static const struct devlink_health_reporter_ops mlx5_tx_reporter_ops = {
> .name = "TX",
> .recover = mlx5e_tx_reporter_recover,
>+ .diagnose = mlx5e_tx_reporter_diagnose,
Unrelated to this patch.
> };
>
> #define MLX5_REPORTER_TX_GRACEFUL_PERIOD 500
>diff --git a/include/net/devlink.h b/include/net/devlink.h
>index fe323e9b14e1..d66de8b80cc2 100644
>--- a/include/net/devlink.h
>+++ b/include/net/devlink.h
>@@ -442,17 +442,12 @@ struct devlink_health_reporter;
>
> struct devlink_health_reporter_ops {
> char *name;
>- unsigned int dump_size;
>- unsigned int diagnose_size;
> int (*recover)(struct devlink_health_reporter *reporter,
> void *priv_ctx);
> int (*dump)(struct devlink_health_reporter *reporter,
>- struct devlink_health_buffer **buffers_array,
>- unsigned int buffer_size, unsigned int num_buffers,
>- void *priv_ctx);
>+ struct devlink_msg_ctx *msg_ctx, void *priv_ctx);
> int (*diagnose)(struct devlink_health_reporter *reporter,
>- struct devlink_health_buffer **buffers_array,
>- unsigned int buffer_size, unsigned int num_buffers);
>+ struct devlink_msg_ctx *msg_ctx);
> };
>
> struct devlink_ops {
>diff --git a/net/core/devlink.c b/net/core/devlink.c
>index 57ca096849b3..347b638e6f32 100644
>--- a/net/core/devlink.c
>+++ b/net/core/devlink.c
>@@ -4555,10 +4555,8 @@ static int devlink_msg_snd(struct genl_info *info,
>
> struct devlink_health_reporter {
> struct list_head list;
>- struct devlink_health_buffer **dump_buffers_array;
>+ struct devlink_msg_ctx *dump_msg_ctx;
> struct mutex dump_lock; /* lock parallel read/write from dump buffers */
>- struct devlink_health_buffer **diagnose_buffers_array;
>- struct mutex diagnose_lock; /* lock parallel read/write from diagnose buffers */
Howcome you don't need the mutex anymore?
> void *priv;
> const struct devlink_health_reporter_ops *ops;
> struct devlink *devlink;
>@@ -4619,9 +4617,7 @@ devlink_health_reporter_create(struct devlink *devlink,
> goto unlock;
> }
>
>- if (WARN_ON(ops->dump && !ops->dump_size) ||
>- WARN_ON(ops->diagnose && !ops->diagnose_size) ||
>- WARN_ON(auto_recover && !ops->recover) ||
>+ if (WARN_ON(auto_recover && !ops->recover) ||
> WARN_ON(graceful_period && !ops->recover)) {
> reporter = ERR_PTR(-EINVAL);
> goto unlock;
>@@ -4633,31 +4629,8 @@ devlink_health_reporter_create(struct devlink *devlink,
> goto unlock;
> }
>
>- if (ops->dump) {
>- reporter->dump_buffers_array =
>- devlink_health_buffers_create(ops->dump_size);
>- if (!reporter->dump_buffers_array) {
>- kfree(reporter);
>- reporter = ERR_PTR(-ENOMEM);
>- goto unlock;
>- }
>- }
>-
>- if (ops->diagnose) {
>- reporter->diagnose_buffers_array =
>- devlink_health_buffers_create(ops->diagnose_size);
>- if (!reporter->diagnose_buffers_array) {
>- devlink_health_buffers_destroy(reporter->dump_buffers_array,
>- DEVLINK_HEALTH_SIZE_TO_BUFFERS(ops->dump_size));
>- kfree(reporter);
>- reporter = ERR_PTR(-ENOMEM);
>- goto unlock;
>- }
>- }
>-
> list_add_tail(&reporter->list, &devlink->reporter_list);
> mutex_init(&reporter->dump_lock);
>- mutex_init(&reporter->diagnose_lock);
>
> reporter->priv = priv;
> reporter->ops = ops;
>@@ -4680,10 +4653,8 @@ devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
> {
> mutex_lock(&reporter->devlink->lock);
> list_del(&reporter->list);
>- devlink_health_buffers_destroy(reporter->dump_buffers_array,
>- DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->dump_size));
>- devlink_health_buffers_destroy(reporter->diagnose_buffers_array,
>- DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->diagnose_size));
>+ if (reporter->dump_msg_ctx)
>+ devlink_msg_ctx_free(reporter->dump_msg_ctx);
> kfree(reporter);
> mutex_unlock(&reporter->devlink->lock);
> }
>@@ -4720,12 +4691,15 @@ static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
> if (reporter->dump_avail)
> return 0;
>
>- devlink_health_buffers_reset(reporter->dump_buffers_array,
>- DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->dump_size));
>- err = reporter->ops->dump(reporter, reporter->dump_buffers_array,
>- DEVLINK_HEALTH_BUFFER_SIZE,
>- DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->dump_size),
>- priv_ctx);
>+ reporter->dump_msg_ctx = devlink_msg_ctx_alloc();
>+ if (IS_ERR_OR_NULL(reporter->dump_msg_ctx)) {
>+ err = PTR_ERR(reporter->dump_msg_ctx);
>+ reporter->dump_msg_ctx = NULL;
>+ return err;
>+ }
>+
>+ err = reporter->ops->dump(reporter, reporter->dump_msg_ctx,
>+ priv_ctx);
> if (!err) {
> reporter->dump_avail = true;
> reporter->dump_ts = jiffies;
>@@ -4960,7 +4934,7 @@ static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
> {
> struct devlink *devlink = info->user_ptr[0];
> struct devlink_health_reporter *reporter;
>- u64 num_of_buffers;
>+ struct devlink_msg_ctx *msg_ctx;
> int err;
>
> reporter = devlink_health_reporter_get_from_info(devlink, info);
>@@ -4970,32 +4944,19 @@ static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
> if (!reporter->ops->diagnose)
> return -EOPNOTSUPP;
>
>- num_of_buffers =
>- DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->diagnose_size);
>+ msg_ctx = devlink_msg_ctx_alloc();
>+ if (IS_ERR_OR_NULL(msg_ctx))
>+ return PTR_ERR(msg_ctx);
>
>- mutex_lock(&reporter->diagnose_lock);
>- devlink_health_buffers_reset(reporter->diagnose_buffers_array,
>- num_of_buffers);
>-
>- err = reporter->ops->diagnose(reporter,
>- reporter->diagnose_buffers_array,
>- DEVLINK_HEALTH_BUFFER_SIZE,
>- num_of_buffers);
>+ err = reporter->ops->diagnose(reporter, msg_ctx);
So this is not needed to be in reporter now? Why it was needed before?
> if (err)
> goto out;
>
>- err = devlink_health_buffer_snd(info,
>- DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
>- 0, reporter->diagnose_buffers_array,
>- num_of_buffers);
>- if (err)
>- goto out;
>-
>- mutex_unlock(&reporter->diagnose_lock);
>- return 0;
>+ err = devlink_msg_snd(info, DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
>+ 0, msg_ctx);
>
> out:
>- mutex_unlock(&reporter->diagnose_lock);
>+ devlink_msg_ctx_free(msg_ctx);
> return err;
> }
>
>@@ -5004,8 +4965,8 @@ devlink_health_dump_clear(struct devlink_health_reporter *reporter)
> {
> reporter->dump_avail = false;
> reporter->dump_ts = 0;
>- devlink_health_buffers_reset(reporter->dump_buffers_array,
>- DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->dump_size));
>+ devlink_msg_ctx_free(reporter->dump_msg_ctx);
>+ reporter->dump_msg_ctx = NULL;
> }
>
> static int devlink_nl_cmd_health_reporter_dump_get_doit(struct sk_buff *skb,
>@@ -5013,7 +4974,6 @@ static int devlink_nl_cmd_health_reporter_dump_get_doit(struct sk_buff *skb,
> {
> struct devlink *devlink = info->user_ptr[0];
> struct devlink_health_reporter *reporter;
>- u64 num_of_buffers;
> int err;
>
> reporter = devlink_health_reporter_get_from_info(devlink, info);
>@@ -5023,18 +4983,13 @@ static int devlink_nl_cmd_health_reporter_dump_get_doit(struct sk_buff *skb,
> if (!reporter->ops->dump)
> return -EOPNOTSUPP;
>
>- num_of_buffers =
>- DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->dump_size);
>-
> mutex_lock(&reporter->dump_lock);
> err = devlink_health_do_dump(reporter, NULL);
> if (err)
> goto out;
>
>- err = devlink_health_buffer_snd(info,
>- DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
>- 0, reporter->dump_buffers_array,
>- num_of_buffers);
>+ err = devlink_msg_snd(info, DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
>+ 0, reporter->dump_msg_ctx);
>
> out:
> mutex_unlock(&reporter->dump_lock);
>--
>2.17.1
>
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