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netfilter: nfnetlink_acct: fix nfnl_acct_get operation 

The get operation was not sending the message that was built to
user-space. This patch also includes the appropriate handling for
the return value of netlink_unicast().

Moreover, fix error codes on error (for example, for non-existing
entry was uncorrect).

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2011-12-30 20:32:26 +01:00
parent b236916a68
commit 3ab0b245aa
1 changed files with 13 additions and 4 deletions
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17
net/netfilter/nfnetlink_acct.c
View File

@ -166,7 +166,7 @@ static int
nfnl_acct_get(struct sock *nfnl, struct sk_buff *skb, nfnl_acct_get(struct sock *nfnl, struct sk_buff *skb,
const struct nlmsghdr *nlh, const struct nlattr * const tb[]) const struct nlmsghdr *nlh, const struct nlattr * const tb[])
{ {
int ret = 0; int ret = -ENOENT;
struct nf_acct *cur; struct nf_acct *cur;
char *acct_name; char *acct_name;
@ -186,17 +186,26 @@ nfnl_acct_get(struct sock *nfnl, struct sk_buff *skb,
continue; continue;
skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (skb2 == NULL) if (skb2 == NULL) {
ret = -ENOMEM;
break; break;
}
ret = nfnl_acct_fill_info(skb2, NETLINK_CB(skb).pid, ret = nfnl_acct_fill_info(skb2, NETLINK_CB(skb).pid,
nlh->nlmsg_seq, nlh->nlmsg_seq,
NFNL_MSG_TYPE(nlh->nlmsg_type), NFNL_MSG_TYPE(nlh->nlmsg_type),
NFNL_MSG_ACCT_NEW, cur); NFNL_MSG_ACCT_NEW, cur);
if (ret <= 0) if (ret <= 0) {
kfree_skb(skb2); kfree_skb(skb2);
break;
}
ret = netlink_unicast(nfnl, skb2, NETLINK_CB(skb).pid,
MSG_DONTWAIT);
if (ret > 0)
ret = 0;
break; /* this avoids a loop in nfnetlink. */
return ret == -EAGAIN ? -ENOBUFS : ret;
} }
return ret; return ret;
} }