diff options
| -rw-r--r-- | include/linux/ethtool.h | 13 | ||||
| -rw-r--r-- | include/uapi/linux/ethtool.h | 32 | ||||
| -rw-r--r-- | net/core/ethtool.c | 221 |
3 files changed, 252 insertions, 14 deletions
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index 0a114d05f68d..212f537fc686 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -154,13 +154,23 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings) * @reset: Reset (part of) the device, as specified by a bitmask of * flags from &enum ethtool_reset_flags. Returns a negative * error code or zero. + * @get_rxfh_key_size: Get the size of the RX flow hash key. + * Returns zero if not supported for this specific device. * @get_rxfh_indir_size: Get the size of the RX flow hash indirection table. * Returns zero if not supported for this specific device. * @get_rxfh_indir: Get the contents of the RX flow hash indirection table. * Will not be called if @get_rxfh_indir_size returns zero. + * @get_rxfh: Get the contents of the RX flow hash indirection table and hash + * key. + * Will not be called if @get_rxfh_indir_size and @get_rxfh_key_size + * returns zero. * Returns a negative error code or zero. * @set_rxfh_indir: Set the contents of the RX flow hash indirection table. * Will not be called if @get_rxfh_indir_size returns zero. + * @set_rxfh: Set the contents of the RX flow hash indirection table and + * hash key. + * Will not be called if @get_rxfh_indir_size and @get_rxfh_key_size + * returns zero. * Returns a negative error code or zero. * @get_channels: Get number of channels. * @set_channels: Set number of channels. Returns a negative error code or @@ -232,7 +242,10 @@ struct ethtool_ops { int (*set_rxnfc)(struct net_device *, struct ethtool_rxnfc *); int (*flash_device)(struct net_device *, struct ethtool_flash *); int (*reset)(struct net_device *, u32 *); + u32 (*get_rxfh_key_size)(struct net_device *); u32 (*get_rxfh_indir_size)(struct net_device *); + int (*get_rxfh)(struct net_device *, u32 *, u8 *); + int (*set_rxfh)(struct net_device *, u32 *, u8 *); int (*get_rxfh_indir)(struct net_device *, u32 *); int (*set_rxfh_indir)(struct net_device *, const u32 *); void (*get_channels)(struct net_device *, struct ethtool_channels *); diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index fd161e91b6d7..d47d31d6fa0e 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -847,6 +847,35 @@ struct ethtool_rxfh_indir { }; /** + * struct ethtool_rxfh - command to get/set RX flow hash indir or/and hash key. + * @cmd: Specific command number - %ETHTOOL_GRSSH or %ETHTOOL_SRSSH + * @rss_context: RSS context identifier. + * @indir_size: On entry, the array size of the user buffer, which may be zero. + * On return from %ETHTOOL_GRSSH, the array size of the hardware + * indirection table. + * @key_size: On entry, the array size of the user buffer in bytes, + * which may be zero. + * On return from %ETHTOOL_GRSSH, the size of the RSS hash key. + * @rsvd: Reserved for future extensions. + * @rss_config: RX ring/queue index for each hash value i.e., indirection table + * of size @indir_size followed by hash key of size @key_size. + * + * For %ETHTOOL_GRSSH, a @indir_size and key_size of zero means that only the + * size should be returned. For %ETHTOOL_SRSSH, a @indir_size of 0xDEADBEEF + * means that indir table setting is not requested and a @indir_size of zero + * means the indir table should be reset to default values. This last feature + * is not supported by the original implementations. + */ +struct ethtool_rxfh { + __u32 cmd; + __u32 rss_context; + __u32 indir_size; + __u32 key_size; + __u32 rsvd[2]; + __u32 rss_config[0]; +}; + +/** * struct ethtool_rx_ntuple_flow_spec - specification for RX flow filter * @flow_type: Type of match to perform, e.g. %TCP_V4_FLOW * @h_u: Flow field values to match (dependent on @flow_type) @@ -1118,6 +1147,9 @@ enum ethtool_sfeatures_retval_bits { #define ETHTOOL_GEEE 0x00000044 /* Get EEE settings */ #define ETHTOOL_SEEE 0x00000045 /* Set EEE settings */ +#define ETHTOOL_GRSSH 0x00000046 /* Get RX flow hash configuration */ +#define ETHTOOL_SRSSH 0x00000047 /* Set RX flow hash configuration */ + /* compatibility with older code */ #define SPARC_ETH_GSET ETHTOOL_GSET #define SPARC_ETH_SSET ETHTOOL_SSET diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 640ba0e5831c..1d72786ef866 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -557,6 +557,23 @@ err_out: return ret; } +static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, + struct ethtool_rxnfc *rx_rings, + u32 size) +{ + int ret = 0, i; + + if (copy_from_user(indir, useraddr, size * sizeof(indir[0]))) + ret = -EFAULT; + + /* Validate ring indices */ + for (i = 0; i < size; i++) { + if (indir[i] >= rx_rings->data) + ret = -EINVAL; + } + return ret; +} + static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, void __user *useraddr) { @@ -613,6 +630,7 @@ static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, u32 *indir; const struct ethtool_ops *ops = dev->ethtool_ops; int ret; + u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]); if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir || !ops->get_rxnfc) @@ -643,28 +661,196 @@ static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, for (i = 0; i < dev_size; i++) indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); } else { - if (copy_from_user(indir, - useraddr + - offsetof(struct ethtool_rxfh_indir, - ring_index[0]), - dev_size * sizeof(indir[0]))) { + ret = ethtool_copy_validate_indir(indir, + useraddr + ringidx_offset, + &rx_rings, + dev_size); + if (ret) + goto out; + } + + ret = ops->set_rxfh_indir(dev, indir); + +out: + kfree(indir); + return ret; +} + +static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, + void __user *useraddr) +{ + int ret; + const struct ethtool_ops *ops = dev->ethtool_ops; + u32 user_indir_size = 0, user_key_size = 0; + u32 dev_indir_size = 0, dev_key_size = 0; + u32 total_size; + u32 indir_offset, indir_bytes; + u32 key_offset; + u32 *indir = NULL; + u8 *hkey = NULL; + u8 *rss_config; + + if (!(dev->ethtool_ops->get_rxfh_indir_size || + dev->ethtool_ops->get_rxfh_key_size) || + !dev->ethtool_ops->get_rxfh) + return -EOPNOTSUPP; + + 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))) + return -EFAULT; + + if (copy_to_user(useraddr + key_offset, + &dev_key_size, sizeof(dev_key_size))) + return -EFAULT; + + /* If the user buffer size is 0, this is just a query for the + * device table size and key size. Otherwise, if the User size is + * not equal to device table size or key size it's an error. + */ + if (!user_indir_size && !user_key_size) + return 0; + + if ((user_indir_size && (user_indir_size != dev_indir_size)) || + (user_key_size && (user_key_size != dev_key_size))) + return -EINVAL; + + indir_bytes = user_indir_size * sizeof(indir[0]); + total_size = indir_bytes + user_key_size; + rss_config = kzalloc(total_size, GFP_USER); + if (!rss_config) + return -ENOMEM; + + if (user_indir_size) + indir = (u32 *)rss_config; + + if (user_key_size) + hkey = rss_config + indir_bytes; + + ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey); + if (!ret) { + if (copy_to_user(useraddr + + offsetof(struct ethtool_rxfh, rss_config[0]), + rss_config, total_size)) ret = -EFAULT; + } + + kfree(rss_config); + + return ret; +} + +static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, + void __user *useraddr) +{ + 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; + 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) || + !ops->get_rxnfc || !ops->set_rxfh) + return -EOPNOTSUPP; + + 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))) + 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))) + return -EINVAL; + + if (user_indir_size != 0xDEADBEEF) + indir_bytes = dev_indir_size * sizeof(indir[0]); + + rss_config = kzalloc(indir_bytes + user_key_size, GFP_USER); + if (!rss_config) + return -ENOMEM; + + rx_rings.cmd = ETHTOOL_GRXRINGS; + ret = ops->get_rxnfc(dev, &rx_rings, NULL); + 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. + */ + if (user_indir_size && user_indir_size != 0xDEADBEEF) { + indir = (u32 *)rss_config; + ret = ethtool_copy_validate_indir(indir, + useraddr + rss_cfg_offset, + &rx_rings, + user_indir_size); + if (ret) goto out; - } + } else if (user_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); + } - /* Validate ring indices */ - for (i = 0; i < dev_size; i++) { - if (indir[i] >= rx_rings.data) { - ret = -EINVAL; - goto out; - } + if (user_key_size) { + hkey = rss_config + indir_bytes; + if (copy_from_user(hkey, + useraddr + rss_cfg_offset + indir_bytes, + user_key_size)) { + ret = -EFAULT; + goto out; } } - ret = ops->set_rxfh_indir(dev, indir); + ret = ops->set_rxfh(dev, indir, hkey); out: - kfree(indir); + kfree(rss_config); return ret; } @@ -1491,6 +1677,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr) case ETHTOOL_GRXCLSRULE: case ETHTOOL_GRXCLSRLALL: case ETHTOOL_GRXFHINDIR: + case ETHTOOL_GRSSH: case ETHTOOL_GFEATURES: case ETHTOOL_GCHANNELS: case ETHTOOL_GET_TS_INFO: @@ -1628,6 +1815,12 @@ int dev_ethtool(struct net *net, struct ifreq *ifr) case ETHTOOL_SRXFHINDIR: rc = ethtool_set_rxfh_indir(dev, useraddr); break; + case ETHTOOL_GRSSH: + rc = ethtool_get_rxfh(dev, useraddr); + break; + case ETHTOOL_SRSSH: + rc = ethtool_set_rxfh(dev, useraddr); + break; case ETHTOOL_GFEATURES: rc = ethtool_get_features(dev, useraddr); break; |