[lustre-devel] [PATCH 17/41] lnet: ioctl handler for "delete policy"

[James Simmons]

From: Sonia Sharma <sharmaso at whamcloud.com>

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.

WC-bug-id: https://jira.whamcloud.com/browse/LU-9121
Lustre-commit: 8258e7235c7047b ("LU-9121 lnet: ioctl handler for "delete policy"")
Signed-off-by: Sonia Sharma <sharmaso at whamcloud.com>
Signed-off-by: Amir Shehata <ashehata at whamcloud.com>
Reviewed-on: https://review.whamcloud.com/34552
Reviewed-by: Serguei Smirnov <ssmirnov at whamcloud.com>
Reviewed-by: Chris Horn <chris.horn at hpe.com>
Signed-off-by: James Simmons <jsimmons at infradead.org>
---
 include/uapi/linux/lnet/libcfs_ioctl.h |  3 ++-
 net/lnet/lnet/api-ni.c                 | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/lnet/libcfs_ioctl.h b/include/uapi/linux/lnet/libcfs_ioctl.h
index 6cffa01..9e3c427 100644
--- a/include/uapi/linux/lnet/libcfs_ioctl.h
+++ b/include/uapi/linux/lnet/libcfs_ioctl.h
@@ -151,6 +151,7 @@ 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
 
 #endif /* __LIBCFS_IOCTL_H__ */
diff --git a/net/lnet/lnet/api-ni.c b/net/lnet/lnet/api-ni.c
index fe8da30..50f7b9e 100644
--- a/net/lnet/lnet/api-ni.c
+++ b/net/lnet/lnet/api-ni.c
@@ -4142,6 +4142,26 @@ u32 lnet_get_dlc_seq_locked(void)
 		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)
-- 
1.8.3.1