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Date: Wed, 6 Sep 2023 13:11:09 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: stephen@...workplumber.org,
dsahern@...il.com
Subject: [patch iproute2-next v2 2/6] devlink: make parsing of handle non-destructive to argv
From: Jiri Pirko <jiri@...dia.com>
Currently, handle parsing is destructive as the "\0" string ends are
being put in certain positions during parsing. That prevents it from
being used repeatedly. This is problematic with the follow-up patch
implementing dry-parsing. Fix by making a copy of handle argv during
parsing.
Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
devlink/devlink.c | 46 ++++++++++++++++++++++++++--------------------
1 file changed, 26 insertions(+), 20 deletions(-)
diff --git a/devlink/devlink.c b/devlink/devlink.c
index 6643f659a8bd..f383028ec560 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -378,6 +378,7 @@ struct dl {
struct list_head ifname_map_list;
int argc;
char **argv;
+ char *handle_argv;
bool no_nice_names;
struct dl_opts opts;
bool json_output;
@@ -1066,9 +1067,8 @@ static int __dl_argv_handle(char *str, char **p_bus_name, char **p_dev_name)
return 0;
}
-static int dl_argv_handle(struct dl *dl, char **p_bus_name, char **p_dev_name)
+static int dl_argv_handle(char *str, char **p_bus_name, char **p_dev_name)
{
- char *str = dl_argv_next(dl);
int err;
err = ident_str_validate(str, 1);
@@ -1121,10 +1121,9 @@ static int __dl_argv_handle_port_ifname(struct dl *dl, char *str,
return 0;
}
-static int dl_argv_handle_port(struct dl *dl, char **p_bus_name,
+static int dl_argv_handle_port(struct dl *dl, char *str, char **p_bus_name,
char **p_dev_name, uint32_t *p_port_index)
{
- char *str = dl_argv_next(dl);
unsigned int slash_count;
if (!str) {
@@ -1146,11 +1145,10 @@ static int dl_argv_handle_port(struct dl *dl, char **p_bus_name,
}
}
-static int dl_argv_handle_both(struct dl *dl, char **p_bus_name,
+static int dl_argv_handle_both(struct dl *dl, char *str, char **p_bus_name,
char **p_dev_name, uint32_t *p_port_index,
uint64_t *p_handle_bit)
{
- char *str = dl_argv_next(dl);
unsigned int slash_count;
int err;
@@ -1199,10 +1197,9 @@ static int __dl_argv_handle_name(char *str, char **p_bus_name,
return str_split_by_char(handlestr, p_bus_name, p_dev_name, '/');
}
-static int dl_argv_handle_region(struct dl *dl, char **p_bus_name,
+static int dl_argv_handle_region(char *str, char **p_bus_name,
char **p_dev_name, char **p_region)
{
- char *str = dl_argv_next(dl);
int err;
err = ident_str_validate(str, 2);
@@ -1218,10 +1215,9 @@ static int dl_argv_handle_region(struct dl *dl, char **p_bus_name,
}
-static int dl_argv_handle_rate_node(struct dl *dl, char **p_bus_name,
+static int dl_argv_handle_rate_node(char *str, char **p_bus_name,
char **p_dev_name, char **p_node)
{
- char *str = dl_argv_next(dl);
int err;
err = ident_str_validate(str, 2);
@@ -1244,11 +1240,10 @@ static int dl_argv_handle_rate_node(struct dl *dl, char **p_bus_name,
return err;
}
-static int dl_argv_handle_rate(struct dl *dl, char **p_bus_name,
+static int dl_argv_handle_rate(char *str, char **p_bus_name,
char **p_dev_name, uint32_t *p_port_index,
char **p_node_name, uint64_t *p_handle_bit)
{
- char *str = dl_argv_next(dl);
char *identifier;
int err;
@@ -1698,14 +1693,24 @@ static int dl_argv_parse(struct dl *dl, uint64_t o_required,
{
struct dl_opts *opts = &dl->opts;
uint64_t o_all = o_required | o_optional;
+ char *str = dl_argv_next(dl);
uint64_t o_found = 0;
int err;
+ if (str) {
+ str = strdup(str);
+ if (!str)
+ return -ENOMEM;
+ free(dl->handle_argv);
+ dl->handle_argv = str;
+ }
+
if (o_required & DL_OPT_HANDLE && o_required & DL_OPT_HANDLEP) {
uint64_t handle_bit;
- err = dl_argv_handle_both(dl, &opts->bus_name, &opts->dev_name,
- &opts->port_index, &handle_bit);
+ err = dl_argv_handle_both(dl, str, &opts->bus_name,
+ &opts->dev_name, &opts->port_index,
+ &handle_bit);
if (err)
return err;
o_required &= ~(DL_OPT_HANDLE | DL_OPT_HANDLEP) | handle_bit;
@@ -1714,7 +1719,7 @@ static int dl_argv_parse(struct dl *dl, uint64_t o_required,
o_required & DL_OPT_PORT_FN_RATE_NODE_NAME) {
uint64_t handle_bit;
- err = dl_argv_handle_rate(dl, &opts->bus_name, &opts->dev_name,
+ err = dl_argv_handle_rate(str, &opts->bus_name, &opts->dev_name,
&opts->port_index,
&opts->rate_node_name,
&handle_bit);
@@ -1724,25 +1729,25 @@ static int dl_argv_parse(struct dl *dl, uint64_t o_required,
handle_bit;
o_found |= handle_bit;
} else if (o_required & DL_OPT_HANDLE) {
- err = dl_argv_handle(dl, &opts->bus_name, &opts->dev_name);
+ err = dl_argv_handle(str, &opts->bus_name, &opts->dev_name);
if (err)
return err;
o_found |= DL_OPT_HANDLE;
} else if (o_required & DL_OPT_HANDLEP) {
- err = dl_argv_handle_port(dl, &opts->bus_name, &opts->dev_name,
- &opts->port_index);
+ err = dl_argv_handle_port(dl, str, &opts->bus_name,
+ &opts->dev_name, &opts->port_index);
if (err)
return err;
o_found |= DL_OPT_HANDLEP;
} else if (o_required & DL_OPT_HANDLE_REGION) {
- err = dl_argv_handle_region(dl, &opts->bus_name,
+ err = dl_argv_handle_region(str, &opts->bus_name,
&opts->dev_name,
&opts->region_name);
if (err)
return err;
o_found |= DL_OPT_HANDLE_REGION;
} else if (o_required & DL_OPT_PORT_FN_RATE_NODE_NAME) {
- err = dl_argv_handle_rate_node(dl, &opts->bus_name,
+ err = dl_argv_handle_rate_node(str, &opts->bus_name,
&opts->dev_name,
&opts->rate_node_name);
if (err)
@@ -9902,6 +9907,7 @@ static struct dl *dl_alloc(void)
static void dl_free(struct dl *dl)
{
+ free(dl->handle_argv);
free(dl);
}
--
2.41.0
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