diff --git a/monitor.c b/monitor.c
index 09aa3cd..e27dbbe 100644
--- a/monitor.c
+++ b/monitor.c
@@ -140,6 +140,24 @@ struct mon_fd_t {
     QLIST_ENTRY(mon_fd_t) next;
 };
 
+/* file descriptor associated with a file descriptor set */
+typedef struct mon_fdset_fd_t mon_fdset_fd_t;
+struct mon_fdset_fd_t {
+    int fd;
+    bool removed;
+    QLIST_ENTRY(mon_fdset_fd_t) next;
+};
+
+/* file descriptor set containing fds passed via SCM_RIGHTS */
+typedef struct mon_fdset_t mon_fdset_t;
+struct mon_fdset_t {
+    int64_t id;
+    int refcount;
+    bool in_use;
+    QLIST_HEAD(, mon_fdset_fd_t) fds;
+    QLIST_ENTRY(mon_fdset_t) next;
+};
+
 typedef struct MonitorControl {
     QObject *id;
     JSONMessageParser parser;
@@ -176,7 +194,8 @@ struct Monitor {
     int print_calls_nr;
 #endif
     QError *error;
-    QLIST_HEAD(,mon_fd_t) fds;
+    QLIST_HEAD(, mon_fd_t) fds;
+    QLIST_HEAD(, mon_fdset_t) fdsets;
     QLIST_ENTRY(Monitor) entry;
 };
 
@@ -2396,6 +2415,129 @@ int monitor_get_fd(Monitor *mon, const char *fdname)
     return -1;
 }
 
+static void monitor_fdset_cleanup(mon_fdset_t *mon_fdset)
+{
+    mon_fdset_fd_t *mon_fdset_fd;
+    mon_fdset_fd_t *mon_fdset_fd_next;
+
+    if (mon_fdset->refcount != 0) {
+        return;
+    }
+
+    QLIST_FOREACH_SAFE(mon_fdset_fd, &mon_fdset->fds, next, mon_fdset_fd_next) {
+        if (!mon_fdset->in_use || mon_fdset_fd->removed) {
+            close(mon_fdset_fd->fd);
+            QLIST_REMOVE(mon_fdset_fd, next);
+            g_free(mon_fdset_fd);
+        }
+    }
+
+    if (QLIST_EMPTY(&mon_fdset->fds)) {
+        QLIST_REMOVE(mon_fdset, next);
+        g_free(mon_fdset);
+    }
+}
+
+AddfdInfo *qmp_add_fd(int64_t fdset_id, Error **errp)
+{
+    int fd;
+    Monitor *mon = cur_mon;
+    mon_fdset_t *mon_fdset;
+    mon_fdset_fd_t *mon_fdset_fd;
+    AddfdInfo *fdinfo;
+
+    fd = qemu_chr_fe_get_msgfd(mon->chr);
+    if (fd == -1) {
+        qerror_report(QERR_FD_NOT_SUPPLIED);
+        return NULL;
+    }
+
+    QLIST_FOREACH(mon_fdset, &mon->fdsets, next) {
+        if (mon_fdset->id == fdset_id) {
+            break;
+        }
+    }
+
+    if (!mon_fdset) {
+        mon_fdset = g_malloc0(sizeof(*mon_fdset));
+        mon_fdset->id = fdset_id;
+        mon_fdset->refcount = 0;
+        mon_fdset->in_use = true;
+        QLIST_INSERT_HEAD(&mon->fdsets, mon_fdset, next);
+    }
+
+    mon_fdset_fd = g_malloc0(sizeof(*mon_fdset_fd));
+    mon_fdset_fd->fd = fd;
+    mon_fdset_fd->removed = false;
+    QLIST_INSERT_HEAD(&mon_fdset->fds, mon_fdset_fd, next);
+
+    fdinfo = g_malloc0(sizeof(*fdinfo));
+    fdinfo->fdset_id = fdset_id;
+    fdinfo->fd = fd;
+
+    return fdinfo;
+}
+
+void qmp_remove_fd(int64_t fdset_id, int64_t fd, Error **errp)
+{
+    Monitor *mon = cur_mon;
+    mon_fdset_t *mon_fdset;
+    mon_fdset_fd_t *mon_fdset_fd;
+    char fd_str[20];
+
+    QLIST_FOREACH(mon_fdset, &mon->fdsets, next) {
+        if (mon_fdset->id != fdset_id) {
+            continue;
+        }
+        QLIST_FOREACH(mon_fdset_fd, &mon_fdset->fds, next) {
+            if (mon_fdset_fd->fd != fd) {
+                continue;
+            }
+            mon_fdset_fd->removed = true;
+            monitor_fdset_cleanup(mon_fdset);
+            return;
+        }
+    }
+    snprintf(fd_str, sizeof(fd_str), "%ld", fd);
+    qerror_report(QERR_FD_NOT_FOUND, fd_str);
+}
+
+FdsetInfoList *qmp_query_fdsets(Error **errp)
+{
+    Monitor *mon = cur_mon;
+    mon_fdset_t *mon_fdset;
+    mon_fdset_fd_t *mon_fdset_fd;
+    FdsetInfoList *fdset_list = NULL;
+
+    QLIST_FOREACH(mon_fdset, &mon->fdsets, next) {
+        FdsetInfoList *fdset_info = g_malloc0(sizeof(*fdset_info));
+        FdsetFdInfoList *fdsetfd_list = NULL;
+
+        fdset_info->value = g_malloc0(sizeof(*fdset_info->value));
+        fdset_info->value->fdset_id = mon_fdset->id;
+        fdset_info->value->refcount = mon_fdset->refcount;
+        fdset_info->value->in_use = mon_fdset->in_use;
+
+        QLIST_FOREACH(mon_fdset_fd, &mon_fdset->fds, next) {
+            FdsetFdInfoList *fdsetfd_info = g_malloc0(sizeof(*fdsetfd_info));
+
+            fdsetfd_info->value = g_malloc0(sizeof(*fdsetfd_info->value));
+            fdsetfd_info->value->fd = mon_fdset_fd->fd;
+            fdsetfd_info->value->removed = mon_fdset_fd->removed;
+
+            fdsetfd_info->next = fdsetfd_list;
+            fdsetfd_list = fdsetfd_info;
+        }
+
+        fdset_info->value->fds = fdsetfd_list;
+
+        fdset_info->next = fdset_list;
+        fdset_list = fdset_info;
+    }
+
+    return fdset_list;
+}
+
 /* mon_cmds and info_cmds would be sorted at runtime */
 static mon_cmd_t mon_cmds[] = {
 #include "hmp-commands.h"
diff --git a/qapi-schema.json b/qapi-schema.json
index a92adb1..c07ff07 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1905,3 +1905,100 @@
 # Since: 0.14.0
 ##
 { 'command': 'closefd', 'data': {'fdname': 'str'} }
+
+# @AddfdInfo:
+#
+# Information about a file descriptor that was added to an fd set.
+#
+# @fdset_id: The ID of the fd set that @fd was added to.
+#
+# @fd: The file descriptor that was received via SCM rights and
+#      added to the fd set.
+#
+# Since: 1.2.0
+##
+{ 'type': 'AddfdInfo', 'data': {'fdset_id': 'int', 'fd': 'int'} }
+
+##
+# @add-fd:
+#
+# Add a file descriptor, that was passed via SCM rights, to an fd set.
+#
+# @fdset_id: The ID of the fd set to add the file descriptor to.
+#
+# Returns: @AddfdInfo on success
+#          If file descriptor was not received, FdNotSupplied
+#
+# Since: 1.2.0
+##
+{ 'command': 'add-fd', 'data': {'fdset_id': 'int'},
+  'returns': 'AddfdInfo' }
+
+##
+# @remove-fd:
+#
+# Remove a file descriptor from an fd set.
+#
+# @fdset_id: The ID of the fd set that the file descriptor belongs to.
+#
+# @fd: The file descriptor that is to be removed.
+#
+# Returns: Nothing on success
+#          If @fdset_id or @fd is not found, FdNotFound
+#
+# Since: 1.2.0
+#
+# Notes: File descriptors that are removed:
+#        o will not be closed until the reference count corresponding
+#          to @fdset_id reaches zero.
+#        o will not be available for use after successful completion
+#          of the remove-fd command.
+##
+{ 'command': 'remove-fd', 'data': {'fdset_id': 'int', 'fd': 'int'} }
+
+##
+# @FdsetFdInfo:
+#
+# Information about a file descriptor that belongs to an fd set.
+#
+# @fd: The file descriptor value.
+#
+# @removed: If true, the remove-fd command has been issued for this fd.
+#
+# Since: 1.2.0
+##
+{ 'type': 'FdsetFdInfo', 'data': {'fd': 'int', 'removed': 'bool'} }
+
+##
+# @FdsetInfo:
+#
+# Information about an fd set.
+#
+# @fdset_id: The ID of the fd set.
+#
+# @refcount: A count of the number of outstanding dup() references to
+#            this fd set.
+#
+# @in_use: If true, this fd set is in use by a connected QMP monitor.
+#
+# @fds: A list of file descriptors that belong to this fd set.
+#
+# Since: 1.2.0
+##
+{ 'type': 'FdsetInfo',
+  'data': {'fdset_id': 'int', 'refcount': 'int', 'in_use': 'bool',
+           'fds': ['FdsetFdInfo']} }
+
+##
+# @query-fdsets:
+#
+# Return information describing all fd sets.
+#
+# Returns: A list of @FdsetInfo
+#
+# Since: 1.2.0
+#
+# Notes: File descriptors are not closed until @refcount is zero,
+#        and either @in_use is false or @removed is true.
+##
+{ 'command': 'query-fdsets', 'returns': ['FdsetInfo'] }
diff --git a/qmp-commands.hx b/qmp-commands.hx
index e3cf3c5..d485df4 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -926,6 +926,127 @@ Example:
 
 EQMP
 
+     {
+        .name       = "add-fd",
+        .args_type  = "fdset_id:i",
+        .params     = "add-fd fdset_id",
+        .help       = "Add a file descriptor, that was passed via SCM rights, to an fd set",
+        .mhandler.cmd_new = qmp_marshal_input_add_fd,
+    },
+
+SQMP
+add-fd
+-------
+
+Add a file descriptor, that was passed via SCM rights, to an fd set.
+
+Arguments:
+
+- "fdset_id": The ID of the fd set to add the file descriptor to.  (json-int)
+
+Return a json-object with the following information:
+
+- "fdset_id": The ID of the fd set that the fd was added to. (json-int)
+- "fd": The file descriptor that was received via SCM rights and added to the
+        fd set. (json-int)
+
+Example:
+
+-> { "execute": "add-fd", "arguments": { "fdset_id": 1 } }
+<- { "return": { "fdset_id": 1, "fd": 3 } }
+
+EQMP
+
+     {
+        .name       = "remove-fd",
+        .args_type  = "fdset_id:i,fd:i",
+        .params     = "remove-fd fdset_id fd",
+        .help       = "Remove a file descriptor from an fd set",
+        .mhandler.cmd_new = qmp_marshal_input_remove_fd,
+    },
+
+SQMP
+remove-fd
+---------
+
+Remove a file descriptor from an fd set.
+
+Arguments:
+
+- "fdset_id": The ID of the fd set that the file descriptor belongs to.
+              (json-int)
+- "fd": The file descriptor that is to be removed. (json-int)
+
+Example:
+
+-> { "execute": "remove-fd", "arguments": { "fdset_id": 1, "fd": 3 } }
+<- { "return": {} }
+
+Notes:
+
+(1) File descriptors that are removed:
+    (a) will not be closed until the reference count corresponding to fdset_id
+        reaches zero.
+    (b) will not be available for use after successful completion of the
+        remove-fd command.
+
+EQMP
+
+    {
+        .name       = "query-fdsets",
+        .args_type  = "",
+        .help       = "Return information describing all fd sets",
+        .mhandler.cmd_new = qmp_marshal_input_query_fdsets,
+    },
+
+SQMP
+query-fdsets
+-------------
+
+Return information describing all fd sets.
+
+Arguments: None
+
+Example:
+
+-> { "execute": "query-fdsets" }
+<- { "return": [
+       {
+         "fdset_id": 1
+         "refcount": 0,
+         "in_use": true,
+         "fds": [
+           {
+             "fd": 21,
+             "removed": false
+           },
+           {
+             "fd": 23,
+             "removed": false
+           }
+         ],
+       },
+       {
+         "fdset_id": 2
+         "refcount": 0,
+         "in_use": true,
+         "fds": [
+           {
+             "fd": 22,
+             "removed": false
+           }
+         ],
+       }
+     ]
+   }
+
+Notes:
+
+(1) File descriptors are not closed until refcount is zero, and
+    either in_use is false or removed is true.
+
+EQMP
+
     {
         .name       = "block_passwd",
         .args_type  = "device:B,password:s",
