LU-9121 lnet: ioctl handler for "delete policy"

The ioctl handler for "delete policy" deletes
a policy with the given index value. It
returns 0 if a policy with that index is found
else it returns -EINVAL.

Change-Id: I037c6808e71e5c13ccf46c243145b0ce6f1229cb
Test-Parameters: trivial testlist=lnet-selftest,sanity-lnet
Signed-off-by: Sonia Sharma <sharmaso@whamcloud.com>
Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/34552
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>

diff --git a/lnet/include/uapi/linux/lnet/libcfs_ioctl.h b/lnet/include/uapi/linux/lnet/libcfs_ioctl.h
index 2ac0c31..d7bcd8d 100644 (file)
--- a/lnet/include/uapi/linux/lnet/libcfs_ioctl.h
+++ b/lnet/include/uapi/linux/lnet/libcfs_ioctl.h
@@ -150,7 +150,8 @@ struct libcfs_ioctl_data {
 #define IOC_LIBCFS_GET_LOCAL_HSTATS       _IOWR(IOC_LIBCFS_TYPE, 103, IOCTL_CONFIG_SIZE)
 #define IOC_LIBCFS_GET_RECOVERY_QUEUE     _IOWR(IOC_LIBCFS_TYPE, 104, IOCTL_CONFIG_SIZE)
 #define IOC_LIBCFS_ADD_UDSP               _IOWR(IOC_LIBCFS_TYPE, 105, IOCTL_CONFIG_SIZE)
-#define IOC_LIBCFS_MAX_NR                                        105
+#define IOC_LIBCFS_DEL_UDSP               _IOWR(IOC_LIBCFS_TYPE, 106, IOCTL_CONFIG_SIZE)
+#define IOC_LIBCFS_MAX_NR                                        106
 
 extern int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data);
 

diff --git a/lnet/lnet/api-ni.c b/lnet/lnet/api-ni.c
index 45fa7c7..ecbe226 100644 (file)
--- a/lnet/lnet/api-ni.c
+++ b/lnet/lnet/api-ni.c
@@ -4199,6 +4199,26 @@ LNetCtl(unsigned int cmd, void *arg)
                return rc;
        }
 
+       case IOC_LIBCFS_DEL_UDSP: {
+               struct lnet_ioctl_udsp *ioc_udsp = arg;
+               int idx = ioc_udsp->iou_idx;
+
+               if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
+                       return -EINVAL;
+
+               mutex_lock(&the_lnet.ln_api_mutex);
+               rc = lnet_udsp_del_policy(idx);
+               if (!rc) {
+                       rc = lnet_udsp_apply_policies(NULL, false);
+                       CDEBUG(D_NET, "policy re-application returned %d\n",
+                              rc);
+                       rc = 0;
+               }
+               mutex_unlock(&the_lnet.ln_api_mutex);
+
+               return rc;
+       }
+
        default:
                ni = lnet_net2ni_addref(data->ioc_net);
                if (ni == NULL)