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sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_MAX_BURST sockopt 

Check with SCTP_ALL_ASSOC instead in sctp_setsockopt_maxburst and
check with SCTP_FUTURE_ASSOC instead in sctp_getsockopt_maxburst,
it's compatible with 0.

SCTP_CURRENT_ASSOC is supported for SCTP_CONTEXT in this patch.
It also adjusts some code to keep a same check form as other
functions.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2019-01-28 15:08:38 +08:00 committed by David S. Miller
parent 49b037acca
commit e0651a0dc8
1 changed files with 27 additions and 24 deletions
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51
net/sctp/socket.c
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@ -3639,11 +3639,9 @@ static int sctp_setsockopt_maxburst(struct sock *sk,
char __user *optval,
unsigned int optlen)
{
struct sctp_sock *sp = sctp_sk(sk);
struct sctp_assoc_value params;
struct sctp_sock *sp;
struct sctp_association *asoc;
int val;
int assoc_id = 0;
if (optlen == sizeof(int)) {
pr_warn_ratelimited(DEPRECATED
@ -3651,25 +3649,34 @@ static int sctp_setsockopt_maxburst(struct sock *sk,
"Use of int in max_burst socket option deprecated.\n"
"Use struct sctp_assoc_value instead\n",
current->comm, task_pid_nr(current));
if (copy_from_user(&val, optval, optlen))
if (copy_from_user(&params.assoc_value, optval, optlen))
return -EFAULT;
params.assoc_id = SCTP_FUTURE_ASSOC;
} else if (optlen == sizeof(struct sctp_assoc_value)) {
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
val = params.assoc_value;
assoc_id = params.assoc_id;
} else
return -EINVAL;
sp = sctp_sk(sk);
asoc = sctp_id2assoc(sk, params.assoc_id);
if (!asoc && params.assoc_id > SCTP_ALL_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
if (assoc_id != 0) {
asoc = sctp_id2assoc(sk, assoc_id);
if (!asoc)
return -EINVAL;
asoc->max_burst = val;
} else
sp->max_burst = val;
if (asoc) {
asoc->max_burst = params.assoc_value;
return 0;
}
if (params.assoc_id == SCTP_FUTURE_ASSOC ||
params.assoc_id == SCTP_ALL_ASSOC)
sp->max_burst = params.assoc_value;
if (params.assoc_id == SCTP_CURRENT_ASSOC ||
params.assoc_id == SCTP_ALL_ASSOC)
list_for_each_entry(asoc, &sp->ep->asocs, asocs)
asoc->max_burst = params.assoc_value;
return 0;
}
@ -6678,7 +6685,6 @@ static int sctp_getsockopt_maxburst(struct sock *sk, int len,
int __user *optlen)
{
struct sctp_assoc_value params;
struct sctp_sock *sp;
struct sctp_association *asoc;
if (len == sizeof(int)) {
@ -6687,7 +6693,7 @@ static int sctp_getsockopt_maxburst(struct sock *sk, int len,
"Use of int in max_burst socket option.\n"
"Use struct sctp_assoc_value instead\n",
current->comm, task_pid_nr(current));
params.assoc_id = 0;
params.assoc_id = SCTP_FUTURE_ASSOC;
} else if (len >= sizeof(struct sctp_assoc_value)) {
len = sizeof(struct sctp_assoc_value);
if (copy_from_user(&params, optval, len))
@ -6695,15 +6701,12 @@ static int sctp_getsockopt_maxburst(struct sock *sk, int len,
} else
return -EINVAL;
sp = sctp_sk(sk);
asoc = sctp_id2assoc(sk, params.assoc_id);
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
if (params.assoc_id != 0) {
asoc = sctp_id2assoc(sk, params.assoc_id);
if (!asoc)
return -EINVAL;
params.assoc_value = asoc->max_burst;
} else
params.assoc_value = sp->max_burst;
params.assoc_value = asoc ? asoc->max_burst : sctp_sk(sk)->max_burst;
if (len == sizeof(int)) {
if (copy_to_user(optval, &params.assoc_value, len))