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s390/qeth: Convert sprintf/snprintf to scnprintf

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This LWN article explains the rationale for this change
https: //lwn.net/Articles/69419/
Ie. snprintf() returns what *would* be the resulting length,
while scnprintf() returns the actual length.

Reported-by: Jules Irenge <jbi.octave@gmail.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Thorsten Winkler <twinkler@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Thorsten Winkler 2023-02-09 12:04:24 +01:00 committed by Jakub Kicinski
parent dde8769b12
commit 74c05a3828
5 changed files with 42 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/s390/net/qeth_core_main.c
View File

@ -2801,9 +2801,11 @@ static void qeth_print_status_message(struct qeth_card *card)
* of the level OSA sets the first character to zero
* */
if (!card->info.mcl_level[0]) {
sprintf(card->info.mcl_level, "%02x%02x",
card->info.mcl_level[2],
card->info.mcl_level[3]);
scnprintf(card->info.mcl_level,
sizeof(card->info.mcl_level),
"%02x%02x",
card->info.mcl_level[2],
card->info.mcl_level[3]);
break;
}
fallthrough;
@ -6090,7 +6092,7 @@ void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
if (!debug_level_enabled(id, level))
return;
va_start(args, fmt);
vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
vscnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
va_end(args);
debug_text_event(id, level, dbf_txt_buf);
}
@ -6330,8 +6332,8 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
goto err_dev;
}
snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
dev_name(&gdev->dev));
scnprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
dev_name(&gdev->dev));
card->debug = qeth_get_dbf_entry(dbf_name);
if (!card->debug) {
rc = qeth_add_dbf_entry(card, dbf_name);

6
drivers/s390/net/qeth_ethtool.c
View File

@ -172,7 +172,7 @@ static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
qeth_add_stat_strings(&data, prefix, card_stats,
CARD_STATS_LEN);
for (i = 0; i < card->qdio.no_out_queues; i++) {
snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
scnprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
qeth_add_stat_strings(&data, prefix, txq_stats,
TXQ_STATS_LEN);
}
@ -192,8 +192,8 @@ static void qeth_get_drvinfo(struct net_device *dev,
sizeof(info->driver));
strscpy(info->fw_version, card->info.mcl_level,
sizeof(info->fw_version));
snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
scnprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
}
static void qeth_get_channels(struct net_device *dev,

53
drivers/s390/net/qeth_l2_main.c
View File

@ -1255,37 +1255,38 @@ static void qeth_bridge_emit_host_event(struct qeth_card *card,
switch (evtype) {
case anev_reg_unreg:
snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
(code & IPA_ADDR_CHANGE_CODE_REMOVAL)
? "deregister" : "register");
scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
(code & IPA_ADDR_CHANGE_CODE_REMOVAL)
? "deregister" : "register");
env[i] = str[i]; i++;
if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
snprintf(str[i], sizeof(str[i]), "VLAN=%d",
addr_lnid->lnid);
scnprintf(str[i], sizeof(str[i]), "VLAN=%d",
addr_lnid->lnid);
env[i] = str[i]; i++;
}
if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
snprintf(str[i], sizeof(str[i]), "MAC=%pM",
addr_lnid->mac);
scnprintf(str[i], sizeof(str[i]), "MAC=%pM",
addr_lnid->mac);
env[i] = str[i]; i++;
}
snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
token->cssid, token->ssid, token->devnum);
scnprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
token->cssid, token->ssid, token->devnum);
env[i] = str[i]; i++;
snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
scnprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
env[i] = str[i]; i++;
snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
token->chpid);
scnprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
token->chpid);
env[i] = str[i]; i++;
snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
scnprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x",
token->chid);
env[i] = str[i]; i++;
break;
case anev_abort:
snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
env[i] = str[i]; i++;
break;
case anev_reset:
snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
env[i] = str[i]; i++;
break;
}
@ -1314,17 +1315,17 @@ static void qeth_bridge_state_change_worker(struct work_struct *work)
NULL
};
snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
snprintf(env_role, sizeof(env_role), "ROLE=%s",
(data->role == QETH_SBP_ROLE_NONE) ? "none" :
(data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
(data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
"<INVALID>");
snprintf(env_state, sizeof(env_state), "STATE=%s",
(data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
(data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
(data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
"<INVALID>");
scnprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
scnprintf(env_role, sizeof(env_role), "ROLE=%s",
(data->role == QETH_SBP_ROLE_NONE) ? "none" :
(data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
(data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
"<INVALID>");
scnprintf(env_state, sizeof(env_state), "STATE=%s",
(data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
(data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
(data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
"<INVALID>");
kobject_uevent_env(&data->card->gdev->dev.kobj,
KOBJ_CHANGE, env);
kfree(data);

4
drivers/s390/net/qeth_l3_main.c
View File

@ -47,9 +47,9 @@ int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
char *buf)
{
if (proto == QETH_PROT_IPV4)
return sprintf(buf, "%pI4", addr);
return scnprintf(buf, INET_ADDRSTRLEN, "%pI4", addr);
else
return sprintf(buf, "%pI6", addr);
return scnprintf(buf, INET6_ADDRSTRLEN, "%pI6", addr);
}
static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,

4
drivers/s390/net/qeth_l3_sys.c
View File

@ -252,8 +252,8 @@ static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
goto out;
}
snprintf(card->options.hsuid, sizeof(card->options.hsuid),
"%-8s", tmp);
scnprintf(card->options.hsuid, sizeof(card->options.hsuid),
"%-8s", tmp);
ASCEBC(card->options.hsuid, 8);
memcpy(card->dev->perm_addr, card->options.hsuid, 9);