Add zpool_events_seek() functionality

[mirror_zfs.git] / lib / libzfs / libzfs_pool.c

diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c
index b822ace688c950b5570c57a44a2c230e33f9db08..1b8f3b63a82a0822f8a037a0810fa57c03b40129 100644 (file)
--- a/lib/libzfs/libzfs_pool.c
+++ b/lib/libzfs/libzfs_pool.c
@@ -3870,6 +3870,42 @@ zpool_events_clear(libzfs_handle_t *hdl, int *count)
        return (0);
 }
 
+/*
+ * Seek to a specific EID, ZEVENT_SEEK_START, or ZEVENT_SEEK_END for
+ * the passed zevent_fd file handle.  On success zero is returned,
+ * otherwise -1 is returned and hdl->libzfs_error is set to the errno.
+ */
+int
+zpool_events_seek(libzfs_handle_t *hdl, uint64_t eid, int zevent_fd)
+{
+       zfs_cmd_t zc = {"\0"};
+       int error = 0;
+
+       zc.zc_guid = eid;
+       zc.zc_cleanup_fd = zevent_fd;
+
+       if (zfs_ioctl(hdl, ZFS_IOC_EVENTS_SEEK, &zc) != 0) {
+               switch (errno) {
+               case ENOENT:
+                       error = zfs_error_fmt(hdl, EZFS_NOENT,
+                           dgettext(TEXT_DOMAIN, "cannot get event"));
+                       break;
+
+               case ENOMEM:
+                       error = zfs_error_fmt(hdl, EZFS_NOMEM,
+                           dgettext(TEXT_DOMAIN, "cannot get event"));
+                       break;
+
+               default:
+                       error = zpool_standard_error_fmt(hdl, errno,
+                           dgettext(TEXT_DOMAIN, "cannot get event"));
+                       break;
+               }
+       }
+
+       return (error);
+}
+
 void
 zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj,
     char *pathname, size_t len)