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https://gitlab.com/qemu-project/qemu
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2c8b24a391
This patch makes qemu create backend and frontend device entries in xenstore for devices configured on the command line. It will use qdisk and qnic backend names, so the qemu internal backends will be used. Disks can be created using -drive if=xen,file=... Nics can be created using -net nic,macaddr=... Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7225 c046a42c-6fe2-441c-8c8c-71466251a162
105 lines
3.7 KiB
C
105 lines
3.7 KiB
C
#ifndef QEMU_HW_XEN_BACKEND_H
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#define QEMU_HW_XEN_BACKEND_H 1
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#include "xen_common.h"
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#include "sysemu.h"
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#include "net.h"
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#include "block_int.h"
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/* ------------------------------------------------------------- */
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#define XEN_BUFSIZE 1024
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struct XenDevice;
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/* driver uses grant tables -> open gntdev device (xendev->gnttabdev) */
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#define DEVOPS_FLAG_NEED_GNTDEV 1
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/* don't expect frontend doing correct state transitions (aka console quirk) */
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#define DEVOPS_FLAG_IGNORE_STATE 2
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struct XenDevOps {
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size_t size;
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uint32_t flags;
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void (*alloc)(struct XenDevice *xendev);
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int (*init)(struct XenDevice *xendev);
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int (*connect)(struct XenDevice *xendev);
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void (*event)(struct XenDevice *xendev);
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void (*disconnect)(struct XenDevice *xendev);
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int (*free)(struct XenDevice *xendev);
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void (*backend_changed)(struct XenDevice *xendev, const char *node);
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void (*frontend_changed)(struct XenDevice *xendev, const char *node);
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};
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struct XenDevice {
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const char *type;
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int dom;
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int dev;
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char name[64];
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int debug;
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enum xenbus_state be_state;
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enum xenbus_state fe_state;
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int online;
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char be[XEN_BUFSIZE];
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char *fe;
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char *protocol;
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int remote_port;
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int local_port;
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int evtchndev;
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int gnttabdev;
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struct XenDevOps *ops;
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TAILQ_ENTRY(XenDevice) next;
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};
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/* ------------------------------------------------------------- */
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/* variables */
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extern int xen_xc;
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extern struct xs_handle *xenstore;
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extern const char *xen_protocol;
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/* xenstore helper functions */
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int xenstore_write_str(const char *base, const char *node, const char *val);
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int xenstore_write_int(const char *base, const char *node, int ival);
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char *xenstore_read_str(const char *base, const char *node);
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int xenstore_read_int(const char *base, const char *node, int *ival);
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int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val);
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int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
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char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
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int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
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char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
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int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
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const char *xenbus_strstate(enum xenbus_state state);
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struct XenDevice *xen_be_find_xendev(const char *type, int dom, int dev);
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void xen_be_check_state(struct XenDevice *xendev);
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/* xen backend driver bits */
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int xen_be_init(void);
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int xen_be_register(const char *type, struct XenDevOps *ops);
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int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
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int xen_be_bind_evtchn(struct XenDevice *xendev);
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void xen_be_unbind_evtchn(struct XenDevice *xendev);
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int xen_be_send_notify(struct XenDevice *xendev);
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void xen_be_printf(struct XenDevice *xendev, int msg_level, const char *fmt, ...)
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__attribute__ ((format(printf, 3, 4)));
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/* actual backend drivers */
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extern struct XenDevOps xen_console_ops; /* xen_console.c */
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extern struct XenDevOps xen_kbdmouse_ops; /* xen_framebuffer.c */
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extern struct XenDevOps xen_framebuffer_ops; /* xen_framebuffer.c */
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extern struct XenDevOps xen_blkdev_ops; /* xen_disk.c */
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extern struct XenDevOps xen_netdev_ops; /* xen_nic.c */
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void xen_init_display(int domid);
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/* configuration (aka xenbus setup) */
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void xen_config_cleanup(void);
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int xen_config_dev_blk(DriveInfo *disk);
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int xen_config_dev_nic(NICInfo *nic);
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#endif /* QEMU_HW_XEN_BACKEND_H */
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