10bb3c6234
The current implementation of xen_backend only provides 32 bit integer functions to write to xenstore. This patch adds two functions that allow writing 64 bit integers (one generic function and another for the backend only). This patch also fixes the size of the char arrays used to represent these integers as strings (originally 32 bytes, however no more than 12 bytes are needed for 32 bit integers and no more than 21 bytes are needed for 64 bit integers). Signed-off-by: Felipe Franciosi <felipe@paradoxo.org> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
110 lines
4 KiB
C
110 lines
4 KiB
C
#ifndef QEMU_HW_XEN_BACKEND_H
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#define QEMU_HW_XEN_BACKEND_H 1
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#include "hw/xen_common.h"
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#include "sysemu/sysemu.h"
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#include "net/net.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 (*initialise)(struct XenDevice *xendev);
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void (*connected)(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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XenEvtchn evtchndev;
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XenGnttab gnttabdev;
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struct XenDevOps *ops;
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QTAILQ_ENTRY(XenDevice) next;
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};
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/* ------------------------------------------------------------- */
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/* variables */
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extern XenXC 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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int xenstore_write_int64(const char *base, const char *node, int64_t 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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int xenstore_write_be_int64(struct XenDevice *xendev, const char *node, int64_t 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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GCC_FMT_ATTR(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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int xen_config_dev_vfb(int vdev, const char *type);
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int xen_config_dev_vkbd(int vdev);
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int xen_config_dev_console(int vdev);
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#endif /* QEMU_HW_XEN_BACKEND_H */
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