drbd: conn_khelper() for user mode callbacks for connections
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index daf388f..ac0a175 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -252,43 +252,47 @@
return 0;
}
+static void setup_khelper_env(struct drbd_tconn *tconn, char **envp)
+{
+ char *afs;
+
+ if (get_net_conf(tconn)) {
+ switch (((struct sockaddr *)tconn->net_conf->peer_addr)->sa_family) {
+ case AF_INET6:
+ afs = "ipv6";
+ snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6",
+ &((struct sockaddr_in6 *)tconn->net_conf->peer_addr)->sin6_addr);
+ break;
+ case AF_INET:
+ afs = "ipv4";
+ snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
+ &((struct sockaddr_in *)tconn->net_conf->peer_addr)->sin_addr);
+ break;
+ default:
+ afs = "ssocks";
+ snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
+ &((struct sockaddr_in *)tconn->net_conf->peer_addr)->sin_addr);
+ }
+ snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs);
+ put_net_conf(tconn);
+ }
+}
+
int drbd_khelper(struct drbd_conf *mdev, char *cmd)
{
char *envp[] = { "HOME=/",
"TERM=linux",
"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
- NULL, /* Will be set to address family */
- NULL, /* Will be set to address */
+ (char[20]) { }, /* address family */
+ (char[60]) { }, /* address */
NULL };
- char mb[12], af[20], ad[60], *afs;
+ char mb[12];
char *argv[] = {usermode_helper, cmd, mb, NULL };
struct sib_info sib;
int ret;
snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev));
-
- if (get_net_conf(mdev->tconn)) {
- switch (((struct sockaddr *)mdev->tconn->net_conf->peer_addr)->sa_family) {
- case AF_INET6:
- afs = "ipv6";
- snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI6",
- &((struct sockaddr_in6 *)mdev->tconn->net_conf->peer_addr)->sin6_addr);
- break;
- case AF_INET:
- afs = "ipv4";
- snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI4",
- &((struct sockaddr_in *)mdev->tconn->net_conf->peer_addr)->sin_addr);
- break;
- default:
- afs = "ssocks";
- snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI4",
- &((struct sockaddr_in *)mdev->tconn->net_conf->peer_addr)->sin_addr);
- }
- snprintf(af, 20, "DRBD_PEER_AF=%s", afs);
- envp[3]=af;
- envp[4]=ad;
- put_net_conf(mdev->tconn);
- }
+ setup_khelper_env(mdev->tconn, envp);
/* The helper may take some time.
* write out any unsynced meta data changes now */
@@ -317,6 +321,49 @@
return ret;
}
+static void conn_md_sync(struct drbd_tconn *tconn)
+{
+ struct drbd_conf *mdev;
+ int minor;
+
+ idr_for_each_entry(&tconn->volumes, mdev, minor)
+ drbd_md_sync(mdev);
+}
+
+int conn_khelper(struct drbd_tconn *tconn, char *cmd)
+{
+ char *envp[] = { "HOME=/",
+ "TERM=linux",
+ "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
+ (char[20]) { }, /* address family */
+ (char[60]) { }, /* address */
+ NULL };
+ char *argv[] = {usermode_helper, cmd, tconn->name, NULL };
+ int ret;
+
+ setup_khelper_env(tconn, envp);
+ conn_md_sync(tconn);
+
+ conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name);
+ /* TODO: conn_bcast_event() ?? */
+
+ ret = call_usermodehelper(usermode_helper, argv, envp, 1);
+ if (ret)
+ conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n",
+ usermode_helper, cmd, tconn->name,
+ (ret >> 8) & 0xff, ret);
+ else
+ conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n",
+ usermode_helper, cmd, tconn->name,
+ (ret >> 8) & 0xff, ret);
+ /* TODO: conn_bcast_event() ?? */
+
+ if (ret < 0) /* Ignore any ERRNOs we got. */
+ ret = 0;
+
+ return ret;
+}
+
enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev)
{
char *ex_to_string;