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-rw-r--r--net/ethtool/ioctl.c110
1 files changed, 69 insertions, 41 deletions
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 52bfc5b82ec3..1980e37b6472 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -32,6 +32,14 @@
#include <generated/utsrelease.h>
#include "common.h"
+/* State held across locks and calls for commands which have devlink fallback */
+struct ethtool_devlink_compat {
+ union {
+ struct ethtool_flash efl;
+ struct ethtool_drvinfo info;
+ };
+};
+
/*
* Some useful ethtool_ops methods that're device independent.
* If we find that all drivers want to do the same thing here,
@@ -697,22 +705,20 @@ static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
return ret;
}
-static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
- void __user *useraddr)
+static int
+ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
{
- struct ethtool_drvinfo info;
const struct ethtool_ops *ops = dev->ethtool_ops;
- memset(&info, 0, sizeof(info));
- info.cmd = ETHTOOL_GDRVINFO;
- strlcpy(info.version, UTS_RELEASE, sizeof(info.version));
+ rsp->info.cmd = ETHTOOL_GDRVINFO;
+ strlcpy(rsp->info.version, UTS_RELEASE, sizeof(rsp->info.version));
if (ops->get_drvinfo) {
- ops->get_drvinfo(dev, &info);
+ ops->get_drvinfo(dev, &rsp->info);
} else if (dev->dev.parent && dev->dev.parent->driver) {
- strlcpy(info.bus_info, dev_name(dev->dev.parent),
- sizeof(info.bus_info));
- strlcpy(info.driver, dev->dev.parent->driver->name,
- sizeof(info.driver));
+ strlcpy(rsp->info.bus_info, dev_name(dev->dev.parent),
+ sizeof(rsp->info.bus_info));
+ strlcpy(rsp->info.driver, dev->dev.parent->driver->name,
+ sizeof(rsp->info.driver));
} else {
return -EOPNOTSUPP;
}
@@ -726,30 +732,27 @@ static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
rc = ops->get_sset_count(dev, ETH_SS_TEST);
if (rc >= 0)
- info.testinfo_len = rc;
+ rsp->info.testinfo_len = rc;
rc = ops->get_sset_count(dev, ETH_SS_STATS);
if (rc >= 0)
- info.n_stats = rc;
+ rsp->info.n_stats = rc;
rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
if (rc >= 0)
- info.n_priv_flags = rc;
+ rsp->info.n_priv_flags = rc;
}
if (ops->get_regs_len) {
int ret = ops->get_regs_len(dev);
if (ret > 0)
- info.regdump_len = ret;
+ rsp->info.regdump_len = ret;
}
if (ops->get_eeprom_len)
- info.eedump_len = ops->get_eeprom_len(dev);
-
- if (!info.fw_version[0])
- devlink_compat_running_version(dev, info.fw_version,
- sizeof(info.fw_version));
+ rsp->info.eedump_len = ops->get_eeprom_len(dev);
- if (copy_to_user(useraddr, &info, sizeof(info)))
- return -EFAULT;
+ if (!rsp->info.fw_version[0])
+ devlink_compat_running_version(dev, rsp->info.fw_version,
+ sizeof(rsp->info.fw_version));
return 0;
}
@@ -2178,19 +2181,13 @@ static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
return actor(dev, edata.data);
}
-static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
- char __user *useraddr)
+static int
+ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
{
- struct ethtool_flash efl;
-
- if (copy_from_user(&efl, useraddr, sizeof(efl)))
- return -EFAULT;
- efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
-
if (!dev->ethtool_ops->flash_device)
- return devlink_compat_flash_update(dev, efl.data);
+ return devlink_compat_flash_update(dev, req->efl.data);
- return dev->ethtool_ops->flash_device(dev, &efl);
+ return dev->ethtool_ops->flash_device(dev, &req->efl);
}
static int ethtool_set_dump(struct net_device *dev,
@@ -2701,19 +2698,18 @@ static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
/* The main entry point in this file. Called from net/core/dev_ioctl.c */
static int
-__dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
+__dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
+ u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
{
- struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
- u32 ethcmd, sub_cmd;
+ struct net_device *dev;
+ u32 sub_cmd;
int rc;
netdev_features_t old_features;
+ dev = __dev_get_by_name(net, ifr->ifr_name);
if (!dev)
return -ENODEV;
- if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
- return -EFAULT;
-
if (ethcmd == ETHTOOL_PERQUEUE) {
if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
return -EFAULT;
@@ -2787,7 +2783,7 @@ __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
rc = ethtool_set_settings(dev, useraddr);
break;
case ETHTOOL_GDRVINFO:
- rc = ethtool_get_drvinfo(dev, useraddr);
+ rc = ethtool_get_drvinfo(dev, devlink_state);
break;
case ETHTOOL_GREGS:
rc = ethtool_get_regs(dev, useraddr);
@@ -2889,7 +2885,7 @@ __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
break;
case ETHTOOL_FLASHDEV:
- rc = ethtool_flash_device(dev, useraddr);
+ rc = ethtool_flash_device(dev, devlink_state);
break;
case ETHTOOL_RESET:
rc = ethtool_reset(dev, useraddr);
@@ -3003,12 +2999,44 @@ out:
int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
{
+ struct ethtool_devlink_compat *state;
+ u32 ethcmd;
int rc;
+ if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
+ return -EFAULT;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ switch (ethcmd) {
+ case ETHTOOL_FLASHDEV:
+ if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
+ rc = -EFAULT;
+ goto exit_free;
+ }
+ state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
+ break;
+ }
+
rtnl_lock();
- rc = __dev_ethtool(net, ifr, useraddr);
+ rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
rtnl_unlock();
+ if (rc)
+ goto exit_free;
+
+ switch (ethcmd) {
+ case ETHTOOL_GDRVINFO:
+ if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
+ rc = -EFAULT;
+ goto exit_free;
+ }
+ break;
+ }
+exit_free:
+ kfree(state);
return rc;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 21:05:49 +0000