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Message-ID: <20200124215431.47151-2-saeedm@mellanox.com>
Date: Fri, 24 Jan 2020 21:54:50 +0000
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Aya Levin <ayal@...lanox.com>, Jiri Pirko <jiri@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 01/14] devlink: Force enclosing array on binary fmsg data
From: Aya Levin <ayal@...lanox.com>
Add a new API for start/end binary array brackets [] to force array
around binary data as required from JSON. With this restriction, re-open
API to set binary fmsg data.
Signed-off-by: Aya Levin <ayal@...lanox.com>
Reviewed-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
include/net/devlink.h | 5 +++
net/core/devlink.c | 94 +++++++++++++++++++++++++++++++++++++++----
2 files changed, 91 insertions(+), 8 deletions(-)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 5e46c24bb6e6..182a5e69355b 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -979,12 +979,17 @@ int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg);
int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
const char *name);
int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg);
+int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
+ const char *name);
+int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg);
int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value);
int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value);
int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value);
int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value);
int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value);
+int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
+ u16 value_len);
int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
bool value);
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 64367eeb21e6..4791dd8f9917 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4231,6 +4231,12 @@ struct devlink_fmsg_item {
struct devlink_fmsg {
struct list_head item_list;
+ bool putting_binary; /* This flag forces enclosing of binary data
+ * in an array brackets. It forces using
+ * of designated API:
+ * devlink_fmsg_binary_pair_nest_start()
+ * devlink_fmsg_binary_pair_nest_end()
+ */
};
static struct devlink_fmsg *devlink_fmsg_alloc(void)
@@ -4274,17 +4280,26 @@ static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
}
int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_nest_end(fmsg);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
@@ -4295,6 +4310,9 @@ static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
{
struct devlink_fmsg_item *item;
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
return -EMSGSIZE;
@@ -4315,6 +4333,9 @@ int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
{
int err;
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
if (err)
return err;
@@ -4329,6 +4350,9 @@ EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_nest_end(fmsg);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
@@ -4338,6 +4362,9 @@ int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
{
int err;
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
err = devlink_fmsg_pair_nest_start(fmsg, name);
if (err)
return err;
@@ -4354,6 +4381,9 @@ int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
{
int err;
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
err = devlink_fmsg_nest_end(fmsg);
if (err)
return err;
@@ -4366,6 +4396,30 @@ int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
}
EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
+int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
+ const char *name)
+{
+ int err;
+
+ err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ fmsg->putting_binary = true;
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
+
+int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
+{
+ if (!fmsg->putting_binary)
+ return -EINVAL;
+
+ fmsg->putting_binary = false;
+ return devlink_fmsg_arr_pair_nest_end(fmsg);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
+
static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
const void *value, u16 value_len,
u8 value_nla_type)
@@ -4390,40 +4444,59 @@ static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
NLA_NUL_STRING);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
-static int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
- u16 value_len)
+int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
+ u16 value_len)
{
+ if (!fmsg->putting_binary)
+ return -EINVAL;
+
return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
bool value)
@@ -4534,10 +4607,11 @@ int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
const void *value, u32 value_len)
{
u32 data_size;
+ int end_err;
u32 offset;
int err;
- err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
+ err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
if (err)
return err;
@@ -4547,14 +4621,18 @@ int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
data_size = DEVLINK_FMSG_MAX_SIZE;
err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
if (err)
- return err;
+ break;
+ /* Exit from loop with a break (instead of
+ * return) to make sure putting_binary is turned off in
+ * devlink_fmsg_binary_pair_nest_end
+ */
}
- err = devlink_fmsg_arr_pair_nest_end(fmsg);
- if (err)
- return err;
+ end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
+ if (end_err)
+ err = end_err;
- return 0;
+ return err;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
--
2.24.1
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