diff options
author | Alexander Graf <agraf@suse.de> | 2013-08-29 02:41:59 +0400 |
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committer | Alexander Graf <agraf@suse.de> | 2013-08-29 02:41:59 +0400 |
commit | bf550fc93d9855872a95e69e4002256110d89858 (patch) | |
tree | 10876bb4304bffe54c4160a132e7b8de6577ac4e /net/core/ethtool.c | |
parent | 7e48c101e0c53e6095c5f4f5e63d14df50aae8fc (diff) | |
parent | cc2df20c7c4ce594c3e17e9cc260c330646012c8 (diff) | |
download | linux-bf550fc93d9855872a95e69e4002256110d89858.tar.xz |
Merge remote-tracking branch 'origin/next' into kvm-ppc-next
Conflicts:
mm/Kconfig
CMA DMA split and ZSWAP introduction were conflicting, fix up manually.
Diffstat (limited to 'net/core/ethtool.c')
-rw-r--r-- | net/core/ethtool.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c index ce91766eeca9..ab5fa6336c84 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -82,6 +82,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation", [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation", [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation", + [NETIF_F_GSO_MPLS_BIT] = "tx-mpls-segmentation", [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc", [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp", @@ -1319,10 +1320,19 @@ static int ethtool_get_dump_data(struct net_device *dev, if (ret) return ret; - len = (tmp.len > dump.len) ? dump.len : tmp.len; + len = min(tmp.len, dump.len); if (!len) return -EFAULT; + /* Don't ever let the driver think there's more space available + * than it requested with .get_dump_flag(). + */ + dump.len = len; + + /* Always allocate enough space to hold the whole thing so that the + * driver does not need to check the length and bother with partial + * dumping. + */ data = vzalloc(tmp.len); if (!data) return -ENOMEM; @@ -1330,6 +1340,16 @@ static int ethtool_get_dump_data(struct net_device *dev, if (ret) goto out; + /* There are two sane possibilities: + * 1. The driver's .get_dump_data() does not touch dump.len. + * 2. Or it may set dump.len to how much it really writes, which + * should be tmp.len (or len if it can do a partial dump). + * In any case respond to userspace with the actual length of data + * it's receiving. + */ + WARN_ON(dump.len != len && dump.len != tmp.len); + dump.len = len; + if (copy_to_user(useraddr, &dump, sizeof(dump))) { ret = -EFAULT; goto out; @@ -1413,7 +1433,7 @@ static int ethtool_get_module_eeprom(struct net_device *dev, modinfo.eeprom_len); } -/* The main entry point in this file. Called from net/core/dev.c */ +/* The main entry point in this file. Called from net/core/dev_ioctl.c */ int dev_ethtool(struct net *net, struct ifreq *ifr) { |