[PATCH 2/4] ethtool: introduce get_sset_count

Jeff Garzik
2007-08-10T20:25:46Z

Required prep for the priv-flags changeset (next patch), which also uses
ethtool string sets.

commit 86fe0ff220a795c82aa9dea5dc4b7359519a1366
Author: Jeff Garzik <jeff@garzik.org>
Date: Fri Aug 10 15:49:21 2007 -0400

[ETHTOOL] Introduce get_sset_count. Obsolete get_stats_count, self_test_count

Signed-off-by: Jeff Garzik <jeff@garzik.org>

include/linux/ethtool.h | 7 ++-
net/core/ethtool.c | 95 +++++++++++++++++++++++++++++++++++-------------
2 files changed, 75 insertions(+), 27 deletions(-)

86fe0ff220a795c82aa9dea5dc4b7359519a1366
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 0e5de2f..f617998 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -376,11 +376,9 @@ struct ethtool_ops {
int (*set_sg)(struct net_device *, u32);
u32 (*get_tso)(struct net_device *);
int (*set_tso)(struct net_device *, u32);
- int (*self_test_count)(struct net_device *);
void (*self_test)(struct net_device *, struct ethtool_test *, u64 *);
void (*get_strings)(struct net_device *, u32 stringset, u8 *);
int (*phys_id)(struct net_device *, u32);
- int (*get_stats_count)(struct net_device *);
void (*get_ethtool_stats)(struct net_device *, struct ethtool_stats *, u64 *);
int (*begin)(struct net_device *);
void (*complete)(struct net_device *);
@@ -388,6 +386,11 @@ struct ethtool_ops {
int (*set_ufo)(struct net_device *, u32);
u32 (*get_flags)(struct net_device *);
int (*set_flags)(struct net_device *, u32);
+ int (*get_sset_count)(struct net_device *, int);
+
+ /* the following hooks are obsolete */
+ int (*self_test_count)(struct net_device *);/* use get_sset_count */
+ int (*get_stats_count)(struct net_device *);/* use get_sset_count */
};
#endif /* __KERNEL__ */

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 6e8563e..2b366a5 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -179,10 +179,23 @@ static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
info.cmd = ETHTOOL_GDRVINFO;
ops->get_drvinfo(dev, &info);

- if (ops->self_test_count)
- info.testinfo_len = ops->self_test_count(dev);
- if (ops->get_stats_count)
- info.n_stats = ops->get_stats_count(dev);
+ if (ops->get_sset_count) {
+ int rc;
+
+ rc = ops->get_sset_count(dev, ETH_SS_TEST);
+ if (rc >= 0)
+ info.testinfo_len = rc;
+ rc = ops->get_sset_count(dev, ETH_SS_STATS);
+ if (rc >= 0)
+ info.n_stats = rc;
+ } else {
+ /* code path for obsolete hooks */
+
+ if (ops->self_test_count)
+ info.testinfo_len = ops->self_test_count(dev);
+ if (ops->get_stats_count)
+ info.n_stats = ops->get_stats_count(dev);
+ }
if (ops->get_regs_len)
info.regdump_len = ops->get_regs_len(dev);
if (ops->get_eeprom_len)
@@ -669,16 +682,27 @@ static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
struct ethtool_test test;
const struct ethtool_ops *ops = dev->ethtool_ops;
u64 *data;
- int ret;
+ int ret, test_len;

- if (!ops->self_test || !ops->self_test_count)
+ if (!ops->self_test)
+ return -EOPNOTSUPP;
+ if (!ops->get_sset_count && !ops->self_test_count)
return -EOPNOTSUPP;

+ if (ops->get_sset_count)
+ test_len = ops->get_sset_count(dev, ETH_SS_TEST);
+ else
+ /* code path for obsolete hook */
+ test_len = ops->self_test_count(dev);
+ if (test_len < 0)
+ return test_len;
+ WARN_ON(test_len == 0);
+
if (copy_from_user(&test, useraddr, sizeof(test)))
return -EFAULT;

- test.len = ops->self_test_count(dev);
- data = kmalloc(test.len * sizeof(u64), GFP_USER);
+ test.len = test_len;
+ data = kmalloc(test_len * sizeof(u64), GFP_USER);
if (!data)
return -ENOMEM;

@@ -710,19 +734,29 @@ static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
return -EFAULT;

- switch (gstrings.string_set) {
- case ETH_SS_TEST:
- if (!ops->self_test_count)
- return -EOPNOTSUPP;
- gstrings.len = ops->self_test_count(dev);
- break;
- case ETH_SS_STATS:
- if (!ops->get_stats_count)
- return -EOPNOTSUPP;
- gstrings.len = ops->get_stats_count(dev);
- break;
- default:
- return -EINVAL;
+ if (ops->get_sset_count) {
+ ret = ops->get_sset_count(dev, gstrings.string_set);
+ if (ret < 0)
+ return ret;
+
+ gstrings.len = ret;
+ } else {
+ /* code path for obsolete hooks */
+
+ switch (gstrings.string_set) {
+ case ETH_SS_TEST:
+ if (!ops->self_test_count)
+ return -EOPNOTSUPP;
+ gstrings.len = ops->self_test_count(dev);
+ break;
+ case ETH_SS_STATS:
+ if (!ops->get_stats_count)
+ return -EOPNOTSUPP;
+ gstrings.len = ops->get_stats_count(dev);
+ break;
+ default:
+ return -EINVAL;
+ }
}

data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
@@ -762,16 +796,27 @@ static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
struct ethtool_stats stats;
const struct ethtool_ops *ops = dev->ethtool_ops;
u64 *data;
- int ret;
+ int ret, n_stats;

- if (!ops->get_ethtool_stats || !ops->get_stats_count)
+ if (!ops->get_ethtool_stats)
return -EOPNOTSUPP;
+ if (!ops->get_sset_count && !ops->get_stats_count)
+ return -EOPNOTSUPP;
+
+ if (ops->get_sset_count)
+ n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
+ else
+ /* code path for obsolete hook */
+ n_stats = ops->get_stats_count(dev);
+ if (n_stats < 0)
+ return n_stats;
+ WARN_ON(n_stats == 0);

if (copy_from_user(&stats, useraddr, sizeof(stats)))
return -EFAULT;

- stats.n_stats = ops->get_stats_count(dev);
- data = kmalloc(stats.n_stats * sizeof(u64), GFP_USER);
+ stats.n_stats = n_stats;
+ data = kmalloc(n_stats * sizeof(u64), GFP_USER);
if (!data)
return -ENOMEM;