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RDMA/srp: Accept again source addresses that do not have a port number

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The function srp_parse_in() is used both for parsing source address
specifications and for target address specifications. Target addresses
must have a port number. Having to specify a port number for source
addresses is inconvenient. Make sure that srp_parse_in() supports again
parsing addresses with no port number.

Cc: <stable@vger.kernel.org>
Fixes: c62adb7def ("IB/srp: Fix IPv6 address parsing")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Bart Van Assche 2019-05-29 09:38:31 -07:00 committed by Jason Gunthorpe
parent 633fbb06cb
commit bcef5b7215
1 changed files with 15 additions and 6 deletions
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21
drivers/infiniband/ulp/srp/ib_srp.c
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@ -3481,13 +3481,14 @@ static const match_table_t srp_opt_tokens = {
* @net: [in] Network namespace.
* @sa: [out] Address family, IP address and port number.
* @addr_port_str: [in] IP address and port number.
* @has_port: [out] Whether or not @addr_port_str includes a port number.
*
* Parse the following address formats:
* - IPv4: <ip_address>:<port>, e.g. 1.2.3.4:5.
* - IPv6: \[<ipv6_address>\]:<port>, e.g. [1::2:3%4]:5.
*/
static int srp_parse_in(struct net *net, struct sockaddr_storage *sa,
const char *addr_port_str)
const char *addr_port_str, bool *has_port)
{
char *addr_end, *addr = kstrdup(addr_port_str, GFP_KERNEL);
char *port_str;
@ -3496,9 +3497,12 @@ static int srp_parse_in(struct net *net, struct sockaddr_storage *sa,
if (!addr)
return -ENOMEM;
port_str = strrchr(addr, ':');
if (!port_str)
return -EINVAL;
*port_str++ = '\0';
if (port_str && strchr(port_str, ']'))
port_str = NULL;
if (port_str)
*port_str++ = '\0';
if (has_port)
*has_port = port_str != NULL;
ret = inet_pton_with_scope(net, AF_INET, addr, port_str, sa);
if (ret && addr[0]) {
addr_end = addr + strlen(addr) - 1;
@ -3520,6 +3524,7 @@ static int srp_parse_options(struct net *net, const char *buf,
char *p;
substring_t args[MAX_OPT_ARGS];
unsigned long long ull;
bool has_port;
int opt_mask = 0;
int token;
int ret = -EINVAL;
@ -3618,7 +3623,8 @@ static int srp_parse_options(struct net *net, const char *buf,
ret = -ENOMEM;
goto out;
}
ret = srp_parse_in(net, &target->rdma_cm.src.ss, p);
ret = srp_parse_in(net, &target->rdma_cm.src.ss, p,
NULL);
if (ret < 0) {
pr_warn("bad source parameter '%s'\n", p);
kfree(p);
@ -3634,7 +3640,10 @@ static int srp_parse_options(struct net *net, const char *buf,
ret = -ENOMEM;
goto out;
}
ret = srp_parse_in(net, &target->rdma_cm.dst.ss, p);
ret = srp_parse_in(net, &target->rdma_cm.dst.ss, p,
&has_port);
if (!has_port)
ret = -EINVAL;
if (ret < 0) {
pr_warn("bad dest parameter '%s'\n", p);
kfree(p);