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Re: New portal feature breaks systems without IPv6 in kernel | |
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Tomo, List
Please find attached a new patch that fixes the breakage for non-ipv6
enabled hosts.
On Sat, May 21, 2011 at 2:47 AM, FUJITA Tomonori
<fujita.tomonori@xxxxxxxxxxxxx> wrote:
> On Fri, 13 May 2011 19:36:04 +1000
> ronnie sahlberg <ronniesahlberg@xxxxxxxxx> wrote:
>
>> On Thu, May 12, 2011 at 8:22 PM, FUJITA Tomonori
>> <fujita.tomonori@xxxxxxxxxxxxx> wrote:
>>> On Wed, 11 May 2011 17:06:35 +1000
>>> ronnie sahlberg <ronniesahlberg@xxxxxxxxx> wrote:
>>>
>>>> By default, if no portal is specified, tgtd will try to bind to both
>>>> IPv6 and IPv4 wildcard.
>>>> This caused the start to fail with an error on systems with no IPv6 available.
>>>
>>> The root problem is that the current code assumes network
>>> configurations in the following way:
>>>
>>> if (list_empty(&iscsi_portals_list)) {
>>> iscsi_add_portal("0::0", 0, 1, 0);
>>> iscsi_add_portal("0.0.0.0", 0, 1, 0);
>>> }
>>>
>>> Which is exactly what network programing text books tell us not to do,
>>> I think.
>>>
>>> What we should do here is asking a system about available network
>>> addresses by passing NULL to getaddrinfo() like the old code did.
>>>
>>> I think that we should move the portal allocation code in
>>> iscsi_add_portal() to iscsi_tcp_init_potal(). iscsi_tcp_init_potal()
>>> takes addr and port, then creates iscsi_portal struct.
>>>
>>> Can you fix this in such way?
>>>
>>
>> I can and I will
>> patch eta tomorrow
>
> Ping? Let me know if you are busy about other stuff. I could fix it.
>
Attachment:
0001-Fix-the-brekage-in-the-portal-handling-so-it-is-agai.patch.gz
Description: GNU Zip compressed data
From 73f6b26f019052182c05148e3b0853dd9bae76f6 Mon Sep 17 00:00:00 2001
From: Ronnie Sahlberg <ronniesahlberg@xxxxxxxxx>
Date: Mon, 23 May 2011 18:14:42 +1000
Subject: [PATCH] Fix the brekage in the portal handling so it is again possible to run tgtd on hosts without ipv6 support.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@xxxxxxxxx>
---
usr/iscsi/iscsi_tcp.c | 72 ++++++++++++++++++++++--------------------------
usr/iscsi/iscsid.c | 17 +++++++-----
usr/iscsi/iscsid.h | 5 +++-
3 files changed, 47 insertions(+), 47 deletions(-)
diff --git a/usr/iscsi/iscsi_tcp.c b/usr/iscsi/iscsi_tcp.c
index e87bbf1..90cdd4a 100644
--- a/usr/iscsi/iscsi_tcp.c
+++ b/usr/iscsi/iscsi_tcp.c
@@ -169,20 +169,25 @@ static void iscsi_tcp_event_handler(int fd, int events, void *data)
}
}
-static int iscsi_tcp_init_portal(struct iscsi_portal *portal)
+int iscsi_tcp_init_portal(char *addr, int port, int tpgt)
{
struct addrinfo hints, *res, *res0;
char servname[64];
int ret, fd, opt, nr_sock = 0;
+ struct iscsi_portal *portal = NULL;
+ char addrstr[64];
+ void *addrptr;
+
+ port = port ? port : ISCSI_LISTEN_PORT;
memset(servname, 0, sizeof(servname));
- snprintf(servname, sizeof(servname), "%d", portal->port);
+ snprintf(servname, sizeof(servname), "%d", port);
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
- ret = getaddrinfo(portal->addr, servname, &hints, &res0);
+ ret = getaddrinfo(addr, servname, &hints, &res0);
if (ret) {
eprintf("unable to get address info, %m\n");
return -errno;
@@ -237,8 +242,26 @@ static int iscsi_tcp_init_portal(struct iscsi_portal *portal)
else {
listen_fds[nr_sock] = fd;
nr_sock++;
- portal->fd = fd;
}
+
+ portal = zalloc(sizeof(struct iscsi_portal));
+ switch (res->ai_family) {
+ case AF_INET:
+ addrptr = &((struct sockaddr_in *)
+ res->ai_addr)->sin_addr;
+ break;
+ case AF_INET6:
+ addrptr = &((struct sockaddr_in6 *)
+ res->ai_addr)->sin6_addr;
+ break;
+ }
+ portal->addr = strdup(inet_ntop(res->ai_family, addrptr,
+ addrstr, sizeof(addrstr)));
+ portal->port = port;
+ portal->tpgt = tpgt;
+ portal->fd = fd;
+
+ list_add(&portal->iscsi_portal_siblings, &iscsi_portals_list);
}
freeaddrinfo(res0);
@@ -246,34 +269,13 @@ static int iscsi_tcp_init_portal(struct iscsi_portal *portal)
return !nr_sock;
}
-int iscsi_add_portal(char *addr, int port, int tpgt, int do_create)
+int iscsi_add_portal(char *addr, int port, int tpgt)
{
- struct iscsi_portal *new_portal;
-
- list_for_each_entry(new_portal, &iscsi_portals_list,
- iscsi_portal_siblings) {
- if (!strcmp(addr, new_portal->addr)
- && port == new_portal->port) {
- eprintf("add_portal failed. This portal already "
- "exists %s:%d\n", addr, port);
- return -1;
- }
- }
-
- new_portal = zalloc(sizeof(struct iscsi_portal));
- new_portal->addr = strdup(addr);
- new_portal->port = port ? port : ISCSI_LISTEN_PORT;
- new_portal->tpgt = tpgt;
- new_portal->fd = -1;
-
- if (do_create && iscsi_tcp_init_portal(new_portal)) {
+ if (iscsi_tcp_init_portal(addr, port, tpgt)) {
eprintf("failed to create/bind to portal %s:%d\n", addr, port);
- free(new_portal->addr);
- free(new_portal);
return -1;
}
- list_add(&new_portal->iscsi_portal_siblings, &iscsi_portals_list);
return 0;
};
@@ -300,23 +302,15 @@ int iscsi_delete_portal(char *addr, int port)
static int iscsi_tcp_init(void)
{
- struct iscsi_portal *portal;
+ /* If we were passed any portals on the command line */
+ if (portal_arguments)
+ iscsi_param_parse_portals(portal_arguments, 1, 0);
/* if the user did not set a portal we default to wildcard
for ipv4 and ipv6
*/
if (list_empty(&iscsi_portals_list)) {
- iscsi_add_portal("0::0", 0, 1, 0);
- iscsi_add_portal("0.0.0.0", 0, 1, 0);
- }
-
- list_for_each_entry(portal, &iscsi_portals_list,
- iscsi_portal_siblings) {
- int ret;
-
- ret = iscsi_tcp_init_portal(portal);
- if (ret)
- return ret;
+ iscsi_add_portal(NULL, 3260, 1);
}
return 0;
diff --git a/usr/iscsi/iscsid.c b/usr/iscsi/iscsid.c
index 104bdfa..83ce490 100644
--- a/usr/iscsi/iscsid.c
+++ b/usr/iscsi/iscsid.c
@@ -45,6 +45,8 @@
LIST_HEAD(iscsi_portals_list);
+char *portal_arguments;
+
enum {
IOSTATE_FREE,
@@ -2359,8 +2361,8 @@ int iscsi_transportid(int tid, uint64_t itn_id, char *buf, int size)
return len;
}
-static int iscsi_param_parse_portals(char *p, int do_add,
- int do_create, int do_delete)
+int iscsi_param_parse_portals(char *p, int do_add,
+ int do_delete)
{
while (*p) {
if (!strncmp(p, "portal", 6)) {
@@ -2401,8 +2403,8 @@ static int iscsi_param_parse_portals(char *p, int do_add,
char *tmp;
tmp = zalloc(len + 1);
memcpy(tmp, addr, len);
- if (do_add && iscsi_add_portal(tmp, port, 1,
- do_create)) {
+ if (do_add && iscsi_add_portal(tmp,
+ port, 1)) {
free(tmp);
return -1;
}
@@ -2424,17 +2426,18 @@ static int iscsi_param_parse_portals(char *p, int do_add,
static int iscsi_param_parser(char *p)
{
- return iscsi_param_parse_portals(p, 1, 0, 0);
+ portal_arguments = p;
+ return 0;
}
static int iscsi_portal_create(char *p)
{
- return iscsi_param_parse_portals(p, 1, 1, 0);
+ return iscsi_param_parse_portals(p, 1, 0);
}
static int iscsi_portal_destroy(char *p)
{
- return iscsi_param_parse_portals(p, 0, 0, 1);
+ return iscsi_param_parse_portals(p, 0, 1);
}
static struct tgt_driver iscsi = {
diff --git a/usr/iscsi/iscsid.h b/usr/iscsi/iscsid.h
index 0a72261..ce083de 100644
--- a/usr/iscsi/iscsid.h
+++ b/usr/iscsi/iscsid.h
@@ -276,6 +276,8 @@ struct iscsi_portal {
extern struct list_head iscsi_portals_list;
+extern char *portal_arguments;
+
#define set_task_pending(t) ((t)->flags |= (1 << TASK_pending))
#define clear_task_pending(t) ((t)->flags &= ~(1 << TASK_pending))
#define task_pending(t) ((t)->flags & (1 << TASK_pending))
@@ -309,8 +311,9 @@ extern int iscsi_tx_handler(struct iscsi_connection *conn);
extern void iscsi_rx_handler(struct iscsi_connection *conn);
extern int iscsi_scsi_cmd_execute(struct iscsi_task *task);
extern int iscsi_transportid(int tid, uint64_t itn_id, char *buf, int size);
-extern int iscsi_add_portal(char *addr, int port, int tpgt, int do_create);
+extern int iscsi_add_portal(char *addr, int port, int tpgt);
extern int iscsi_delete_portal(char *addr, int port);
+extern int iscsi_param_parse_portals(char *p, int do_add, int do_delete);
/* iscsid.c iscsi_task */
extern void iscsi_free_task(struct iscsi_task *task);
--
1.7.3.1
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