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125 lines
2.4 KiB
125 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2007 Luca Bigliardi ([email protected]). |
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*/ |
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#include <stddef.h> |
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#include <errno.h> |
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#include <libvdeplug.h> |
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#include <net_user.h> |
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#include <um_malloc.h> |
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#include "vde.h" |
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static int vde_user_init(void *data, void *dev) |
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{ |
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struct vde_data *pri = data; |
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VDECONN *conn = NULL; |
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int err = -EINVAL; |
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pri->dev = dev; |
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conn = vde_open(pri->vde_switch, pri->descr, pri->args); |
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if (conn == NULL) { |
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err = -errno; |
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printk(UM_KERN_ERR "vde_user_init: vde_open failed, " |
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"errno = %d\n", errno); |
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return err; |
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} |
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printk(UM_KERN_INFO "vde backend - connection opened\n"); |
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pri->conn = conn; |
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return 0; |
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} |
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static int vde_user_open(void *data) |
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{ |
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struct vde_data *pri = data; |
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if (pri->conn != NULL) |
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return vde_datafd(pri->conn); |
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printk(UM_KERN_WARNING "vde_open - we have no VDECONN to open"); |
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return -EINVAL; |
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} |
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static void vde_remove(void *data) |
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{ |
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struct vde_data *pri = data; |
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if (pri->conn != NULL) { |
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printk(UM_KERN_INFO "vde backend - closing connection\n"); |
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vde_close(pri->conn); |
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pri->conn = NULL; |
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kfree(pri->args); |
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pri->args = NULL; |
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return; |
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} |
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printk(UM_KERN_WARNING "vde_remove - we have no VDECONN to remove"); |
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} |
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const struct net_user_info vde_user_info = { |
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.init = vde_user_init, |
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.open = vde_user_open, |
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.close = NULL, |
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.remove = vde_remove, |
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.add_address = NULL, |
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.delete_address = NULL, |
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.mtu = ETH_MAX_PACKET, |
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.max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER, |
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}; |
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void vde_init_libstuff(struct vde_data *vpri, struct vde_init *init) |
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{ |
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struct vde_open_args *args; |
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vpri->args = uml_kmalloc(sizeof(struct vde_open_args), UM_GFP_KERNEL); |
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if (vpri->args == NULL) { |
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printk(UM_KERN_ERR "vde_init_libstuff - vde_open_args " |
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"allocation failed"); |
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return; |
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} |
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args = vpri->args; |
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args->port = init->port; |
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args->group = init->group; |
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args->mode = init->mode ? init->mode : 0700; |
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args->port ? printk("port %d", args->port) : |
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printk("undefined port"); |
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} |
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int vde_user_read(void *conn, void *buf, int len) |
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{ |
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VDECONN *vconn = conn; |
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int rv; |
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if (vconn == NULL) |
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return 0; |
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rv = vde_recv(vconn, buf, len, 0); |
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if (rv < 0) { |
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if (errno == EAGAIN) |
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return 0; |
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return -errno; |
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} |
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else if (rv == 0) |
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return -ENOTCONN; |
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return rv; |
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} |
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int vde_user_write(void *conn, void *buf, int len) |
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{ |
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VDECONN *vconn = conn; |
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if (vconn == NULL) |
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return 0; |
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return vde_send(vconn, buf, len, 0); |
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} |
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