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https://github.com/xen-project/xen.git
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Stefano Stabellini
b53b4037ce
Add functions to libxl to setup a Xen 9pfs frontend/backend connection. Add support to xl to parse a 9pfs option in the VM config file, in the following format: p9=["tag=share_dir,security_model=none,path=/root/share_dir"] where tag identifies the 9pfs share and it is required to mount it on the guest side, path is the path of the filesystem to share and the only security_model supported is "none" which means that files are stored using the same credentials as they are created on the guest (no user ownership squash or remap). Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Acked-by: Wei Liu <wei.liu2@citrix.com>
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/*
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* Copyright (C) 2017 Aporeto
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* Author Stefano Stabellini <stefano@aporeto.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; version 2.1 only. with the special
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* exception on linking described in file LICENSE.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*/
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#include "libxl_osdeps.h"
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#include "libxl_internal.h"
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int libxl__device_p9_setdefault(libxl__gc *gc, libxl_device_p9 *p9)
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{
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int rc;
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rc = libxl__resolve_domid(gc, p9->backend_domname, &p9->backend_domid);
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return rc;
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}
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static int libxl__device_from_p9(libxl__gc *gc, uint32_t domid,
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libxl_device_p9 *p9,
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libxl__device *device)
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{
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device->backend_devid = p9->devid;
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device->backend_domid = p9->backend_domid;
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device->backend_kind = LIBXL__DEVICE_KIND_9PFS;
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device->devid = p9->devid;
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device->domid = domid;
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device->kind = LIBXL__DEVICE_KIND_9PFS;
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return 0;
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}
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int libxl__device_p9_add(libxl__gc *gc, uint32_t domid,
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libxl_device_p9 *p9)
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{
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flexarray_t *front;
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flexarray_t *back;
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libxl__device device;
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int rc;
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rc = libxl__device_p9_setdefault(gc, p9);
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if (rc) goto out;
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front = flexarray_make(gc, 16, 1);
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back = flexarray_make(gc, 16, 1);
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if (p9->devid == -1) {
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if ((p9->devid = libxl__device_nextid(gc, domid, "9pfs")) < 0) {
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rc = ERROR_FAIL;
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goto out;
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}
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}
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rc = libxl__device_from_p9(gc, domid, p9, &device);
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if (rc != 0) goto out;
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flexarray_append_pair(back, "frontend-id", libxl__sprintf(gc, "%d", domid));
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flexarray_append_pair(back, "online", "1");
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flexarray_append_pair(back, "state", GCSPRINTF("%d", XenbusStateInitialising));
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flexarray_append_pair(front, "backend-id",
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libxl__sprintf(gc, "%d", p9->backend_domid));
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flexarray_append_pair(front, "state", GCSPRINTF("%d", XenbusStateInitialising));
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flexarray_append_pair(front, "tag", p9->tag);
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flexarray_append_pair(back, "path", p9->path);
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flexarray_append_pair(back, "security_model", p9->security_model);
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libxl__device_generic_add(gc, XBT_NULL, &device,
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libxl__xs_kvs_of_flexarray(gc, back),
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libxl__xs_kvs_of_flexarray(gc, front),
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NULL);
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rc = 0;
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out:
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return rc;
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}
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LIBXL_DEFINE_DEVICE_REMOVE(p9)
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