xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'ethtool-rssh-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bwh/net-next

Browse Source 
Ben Hutchings says:

====================
Pull request: Fixes for new ethtool RSS commands

This addresses several problems I previously identified with the new
ETHTOOL_{G,S}RSSH commands:

1. Missing validation of reserved parameters
2. Vague documentation
3. Use of unnamed magic number
4. No consolidation with existing driver operations

I don't currently have access to suitable network hardware, but have
tested these changes with a dummy driver that can support various
combinations of operations and sizes, together with (a) Debian's ethtool
3.13 (b) ethtool 3.14 with the submitted patch to use ETHTOOL_{G,S}RSSH
and minor adjustment for fixes 1 and 3.

v2: Update RSS operations in vmxnet3 too
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2014-06-02 23:07:02 -07:00
parent a68ab98e6c f062a38448
commit 014b20133b
14 changed files with 122 additions and 131 deletions
Download Patch File Download Diff File Expand all files Collapse all files

114
net/core/ethtool.c
View File

@@ -561,19 +561,17 @@ static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
struct ethtool_rxnfc *rx_rings,
u32 size)
{
int ret = 0, i;
int i;
if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
ret = -EFAULT;
return -EFAULT;
/* Validate ring indices */
for (i = 0; i < size; i++) {
if (indir[i] >= rx_rings->data) {
ret = -EINVAL;
break;
}
}
return ret;
for (i = 0; i < size; i++)
if (indir[i] >= rx_rings->data)
return -EINVAL;
return 0;
}
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
@@ -584,7 +582,7 @@ static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
int ret;
if (!dev->ethtool_ops->get_rxfh_indir_size ||
!dev->ethtool_ops->get_rxfh_indir)
!dev->ethtool_ops->get_rxfh)
return -EOPNOTSUPP;
dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
if (dev_size == 0)
@@ -610,7 +608,7 @@ static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
if (!indir)
return -ENOMEM;
ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL);
if (ret)
goto out;
@@ -634,7 +632,7 @@ static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
int ret;
u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
!ops->get_rxnfc)
return -EOPNOTSUPP;
@@ -671,7 +669,7 @@ static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
goto out;
}
ret = ops->set_rxfh_indir(dev, indir);
ret = ops->set_rxfh(dev, indir, NULL);
out:
kfree(indir);
@@ -683,11 +681,11 @@ static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
{
int ret;
const struct ethtool_ops *ops = dev->ethtool_ops;
u32 user_indir_size = 0, user_key_size = 0;
u32 user_indir_size, user_key_size;
u32 dev_indir_size = 0, dev_key_size = 0;
struct ethtool_rxfh rxfh;
u32 total_size;
u32 indir_offset, indir_bytes;
u32 key_offset;
u32 indir_bytes;
u32 *indir = NULL;
u8 *hkey = NULL;
u8 *rss_config;
@@ -699,33 +697,24 @@ static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
if (ops->get_rxfh_indir_size)
dev_indir_size = ops->get_rxfh_indir_size(dev);
indir_offset = offsetof(struct ethtool_rxfh, indir_size);
if (copy_from_user(&user_indir_size,
useraddr + indir_offset,
sizeof(user_indir_size)))
return -EFAULT;
if (copy_to_user(useraddr + indir_offset,
&dev_indir_size, sizeof(dev_indir_size)))
return -EFAULT;
if (ops->get_rxfh_key_size)
dev_key_size = ops->get_rxfh_key_size(dev);
if ((dev_key_size + dev_indir_size) == 0)
return -EOPNOTSUPP;
key_offset = offsetof(struct ethtool_rxfh, key_size);
if (copy_from_user(&user_key_size,
useraddr + key_offset,
sizeof(user_key_size)))
if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
return -EFAULT;
user_indir_size = rxfh.indir_size;
user_key_size = rxfh.key_size;
if (copy_to_user(useraddr + key_offset,
&dev_key_size, sizeof(dev_key_size)))
/* Check that reserved fields are 0 for now */
if (rxfh.rss_context || rxfh.rsvd[0] || rxfh.rsvd[1])
return -EINVAL;
rxfh.indir_size = dev_indir_size;
rxfh.key_size = dev_key_size;
if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
return -EFAULT;
/* If the user buffer size is 0, this is just a query for the
@@ -770,12 +759,11 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
int ret;
const struct ethtool_ops *ops = dev->ethtool_ops;
struct ethtool_rxnfc rx_rings;
u32 user_indir_size = 0, dev_indir_size = 0, i;
u32 user_key_size = 0, dev_key_size = 0;
struct ethtool_rxfh rxfh;
u32 dev_indir_size = 0, dev_key_size = 0, i;
u32 *indir = NULL, indir_bytes = 0;
u8 *hkey = NULL;
u8 *rss_config;
u32 indir_offset, key_offset;
u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
if (!(ops->get_rxfh_indir_size || ops->get_rxfh_key_size) ||
@@ -784,36 +772,33 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
if (ops->get_rxfh_indir_size)
dev_indir_size = ops->get_rxfh_indir_size(dev);
indir_offset = offsetof(struct ethtool_rxfh, indir_size);
if (copy_from_user(&user_indir_size,
useraddr + indir_offset,
sizeof(user_indir_size)))
return -EFAULT;
if (ops->get_rxfh_key_size)
dev_key_size = dev->ethtool_ops->get_rxfh_key_size(dev);
if ((dev_key_size + dev_indir_size) == 0)
return -EOPNOTSUPP;
key_offset = offsetof(struct ethtool_rxfh, key_size);
if (copy_from_user(&user_key_size,
useraddr + key_offset,
sizeof(user_key_size)))
if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
return -EFAULT;
/* If either indir or hash key is valid, proceed further.
*/
if ((user_indir_size && ((user_indir_size != 0xDEADBEEF) &&
user_indir_size != dev_indir_size)) ||
(user_key_size && (user_key_size != dev_key_size)))
/* Check that reserved fields are 0 for now */
if (rxfh.rss_context || rxfh.rsvd[0] || rxfh.rsvd[1])
return -EINVAL;
if (user_indir_size != 0xDEADBEEF)
/* If either indir or hash key is valid, proceed further.
* It is not valid to request that both be unchanged.
*/
if ((rxfh.indir_size &&
rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
rxfh.indir_size != dev_indir_size) ||
(rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
(rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
rxfh.key_size == 0))
return -EINVAL;
if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
indir_bytes = dev_indir_size * sizeof(indir[0]);
rss_config = kzalloc(indir_bytes + user_key_size, GFP_USER);
rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
if (!rss_config)
return -ENOMEM;
@@ -822,28 +807,29 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
if (ret)
goto out;
/* user_indir_size == 0 means reset the indir table to default.
* user_indir_size == 0xDEADBEEF means indir setting is not requested.
/* rxfh.indir_size == 0 means reset the indir table to default.
* rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
*/
if (user_indir_size && user_indir_size != 0xDEADBEEF) {
if (rxfh.indir_size &&
rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
indir = (u32 *)rss_config;
ret = ethtool_copy_validate_indir(indir,
useraddr + rss_cfg_offset,
&rx_rings,
user_indir_size);
rxfh.indir_size);
if (ret)
goto out;
} else if (user_indir_size == 0) {
} else if (rxfh.indir_size == 0) {
indir = (u32 *)rss_config;
for (i = 0; i < dev_indir_size; i++)
indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
}
if (user_key_size) {
if (rxfh.key_size) {
hkey = rss_config + indir_bytes;
if (copy_from_user(hkey,
useraddr + rss_cfg_offset + indir_bytes,
user_key_size)) {
rxfh.key_size)) {
ret = -EFAULT;
goto out;
}