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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] Paravirt framebuffer backend tools [2/5]
Steven Smith <sos22-xen@xxxxxxxxxxxxx> writes:
>> --- a/tools/Makefile Sat Sep 02 15:11:17 2006 -0400
>> +++ b/tools/Makefile Sat Sep 02 15:19:25 2006 -0400
>> @@ -18,6 +18,7 @@ SUBDIRS-y += xenstat
>> SUBDIRS-y += xenstat
>> SUBDIRS-y += libaio
>> SUBDIRS-y += blktap
>> +SUBDIRS-y += xenfb
>>
>> # These don't cross-compile
>> ifeq ($(XEN_COMPILE_ARCH),$(XEN_TARGET_ARCH))
>> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
>> +++ b/tools/xenfb/Makefile Sat Sep 02 15:19:25 2006 -0400
>> @@ -0,0 +1,36 @@
>> +XEN_ROOT=../..
>> +include $(XEN_ROOT)/tools/Rules.mk
>> +
>> +CFLAGS += -g -Wall
> You shouldn't need to add -g here; Rules.mk handles it for you if
> debug is set.
Jeremy took care of this.
>> +CFLAGS += -I$(XEN_LIBXC) -I$(XEN_XENSTORE)
>> -I$(XEN_ROOT)/linux-2.6-xen-sparse/include
>> +LDFLAGS += -L$(XEN_LIBXC) -L$(XEN_XENSTORE)
>> +
>> +INSTALL = install
>> +INSTALL_PROG = $(INSTALL) -m0755
>> +INSTALL_DIR = $(INSTALL) -d -m0755
>> +
>> +.PHONY: all
>> +all: build
>> +
>> +.PHONY: build
>> +build: mk-symlinks
>> + $(MAKE) vncfb sdlfb
>> +
>> +install: all
>> + $(INSTALL_DIR) -p $(DESTDIR)/usr/$(LIBDIR)/xen/bin
>> + $(INSTALL_PROG) vncfb $(DESTDIR)/usr/$(LIBDIR)/xen/bin/xen-vncfb
>> + $(INSTALL_PROG) sdlfb $(DESTDIR)/usr/$(LIBDIR)/xen/bin/xen-sdlfb
>> +
>> +sdlfb: sdlfb.o xenfb.o
>> +
>> +sdlfb.o: CFLAGS += $(shell sdl-config --cflags)
>> +sdlfb: LDLIBS += $(shell sdl-config --libs) -lxenctrl -lxenstore
>> +
>> +clean:
>> + $(RM) *.o *~ vncfb sdlfb
>> +
>> +keymapping.o: CFLAGS += $(shell pkg-config --cflags gtk+-2.0)
>> +
>> +vncfb: vncfb.o xenfb.o keymapping.o
>> +vncfb.o: CFLAGS += $(shell libvncserver-config --cflags)
>> +vncfb: LDLIBS += $(shell libvncserver-config --libs) -lxenctrl -lxenstore
>> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
>> +++ b/tools/xenfb/keymapping.c Sat Sep 02 15:19:25 2006 -0400
>> @@ -0,0 +1,141 @@
>> +#include <stdint.h>
>> +#include <gdk/gdkkeysyms.h>
>> +#include <linux/input.h>
>> +
>> +uint32_t gdk_linux_mapping[0x10000] = {
>> + [GDK_a] = KEY_A,
> This is kind of ugly. Is there any chance it could be autogenerated?
> Also, where did 0x10000 come from?
>
> Also, depending on GTK just for the keymap table is a real pain. Or
> is it already required for libvncserver?
Jeremy answered this one.
There was quite a bit of discussion on how to best encode keys (thanks
to Laurent for patiently explaining the issue). I'm *not* ignoring
that problem. However, the patch is large enough as it is, so let's
get the things it addresses nailed down before we address the key code
problem.
> <snip>
>
>> + [GDK_plus] = KEY_EQUAL,
>> +};
>> +
>> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
>> +++ b/tools/xenfb/sdlfb.c Sat Sep 02 15:19:25 2006 -0400
>> @@ -0,0 +1,191 @@
>> +#include <SDL.h>
>> +#include <sys/types.h>
>> +#include <sys/select.h>
>> +#include <stdlib.h>
>> +#include <linux/input.h>
>> +#include <getopt.h>
>> +#include <string.h>
>> +#include "xenfb.h"
>> +
>> +struct data
> That's a really wonderful name.
Jeremy took care of this.
>> +{
>> + SDL_Surface *dst;
>> + SDL_Surface *src;
>> +};
>> +
>> +void sdl_update(struct xenfb *xenfb, int x, int y, int width, int height)
>> +{
>> + struct data *data = xenfb->user_data;
>> + SDL_Rect r = { x, y, width, height };
>> + SDL_BlitSurface(data->src, &r, data->dst, &r);
>> + SDL_UpdateRect(data->dst, x, y, width, height);
>> +}
>> +
>> +int sdl2linux[1024] = {
>> + [SDLK_a] = KEY_A,
> Another really ugly mapping table, although not quite as bad as the
> GTK one.
>
> Where'd the magic 1024 come from?
Jeremy answered this one.
>> + [SDLK_RALT] = KEY_RIGHTALT,
>> +};
>> +
>> +static struct option options[] = {
>> + { "domid", 1, NULL, 'd' },
>> + { "title", 1, NULL, 't' },
>> +};
>> +
>> +int main(int argc, char **argv)
>> +{
>> + struct xenfb *xenfb;
>> + int fd;
>> + int domid = -1;
>> + char * title = NULL;
>> + fd_set readfds;
>> + struct data data;
>> + SDL_Rect r;
>> + struct timeval tv = { 0, 500 };
>> + int do_quit = 0;
>> + int opt;
> Slightly strange whitespace, but nevermind.
Fixed anyway.
>> +
>> + while ((opt = getopt_long(argc, argv, "d:t:", options,
>> + NULL)) != -1) {
>> + switch (opt) {
>> + case 'd':
>> + domid = strtol(optarg, NULL, 10);
> It'd be nice to check for a malformed argument here.
Done.
>> + break;
>> + case 't':
>> + title = strdup(optarg);
> This can fail.
Jeremy answered this one.
>> + break;
>> + }
>> + }
>> + if (optind != argc) {
>> + fprintf(stderr, "Invalid options!\n");
>> + exit(1);
> errx() maybe?
Jeremy answered this one.
>> + }
>> + if (domid == -1) {
>> + fprintf(stderr, "Domain ID must be specified!\n");
>> + exit(1);
>> + }
>> +
>> + xenfb = xenfb_new();
>> + if (xenfb == NULL)
>> + return 1;
> Why have you used exit(1) in some places and return 1 in others?
It's all exit(1) now.
> Also, an error message here would be a good idea.
Done.
>> +
>> + if (!xenfb_attach_dom(xenfb, domid))
>> + return 1;
> An error mesasge would be good.
Done.
>> +
>> + SDL_Init(SDL_INIT_VIDEO);
>> +
>> + fd = xenfb_get_fileno(xenfb);
>> +
>> + data.dst = SDL_SetVideoMode(xenfb->width, xenfb->height, xenfb->depth,
>> + SDL_SWSURFACE);
>> +
>> + data.src = SDL_CreateRGBSurfaceFrom(xenfb->pixels,
>> + xenfb->width, xenfb->height,
>> + xenfb->depth, xenfb->row_stride,
>> + 0xFF0000, 0xFF00, 0xFF, 0);
>> +
>> + if (title == NULL)
>> + title = strdup("xen-sdlfb");
> This can fail.
Jeremy answered this one.
>> + SDL_WM_SetCaption(title, title);
>> +
>> + r.x = r.y = 0;
>> + r.w = xenfb->width;
>> + r.h = xenfb->height;
>> + SDL_BlitSurface(data.src, &r, data.dst, &r);
>> + SDL_UpdateRect(data.dst, 0, 0, xenfb->width, xenfb->height);
>> +
>> + xenfb->update = sdl_update;
>> + xenfb->user_data = &data;
>> +
>> + FD_ZERO(&readfds);
>> + FD_SET(fd, &readfds);
>> +
>> + SDL_ShowCursor(0);
>> +
>> + while (!do_quit && select(fd + 1, &readfds, NULL, NULL, &tv) != -1) {
> Select can say -1 because of EINTR (e.g. when strace attaches). It's
> not clear to me whether you want to exit or retry in that case.
>
> Also, if you quit because select returns -1, you need an error
> message.
Reworked the loop.
>> + SDL_Event event;
>> +
>> + while (SDL_PollEvent(&event)) {
>> + switch (event.type) {
>> + case SDL_KEYDOWN:
>> + case SDL_KEYUP:
>> + xenfb_send_key(xenfb,
>> + event.type == SDL_KEYDOWN,
>> + sdl2linux[event.key.keysym.sym]);
>> + break;
>> + case SDL_MOUSEMOTION: {
>> + int x, y;
>> + Uint8 button;
>> +
>> + button = SDL_GetRelativeMouseState(&x, &y);
>> + xenfb_send_motion(xenfb, x, y);
>> + } break;
>> + case SDL_MOUSEBUTTONDOWN:
>> + case SDL_MOUSEBUTTONUP:
>> + xenfb_send_button(xenfb,
>> +
>> event.type==SDL_MOUSEBUTTONDOWN,
>> + 3 - event.button.button);
>> + break;
>> + case SDL_QUIT:
>> + do_quit = 1;
>> + break;
>> + }
>> + }
>> + if (FD_ISSET(fd, &readfds))
>> + xenfb_on_incoming(xenfb);
>> +
>> + FD_ZERO(&readfds);
>> + FD_SET(fd, &readfds);
>> +
>> + tv = (struct timeval){0, 500};
> I think 500us is a little short here. About ten milliseconds sounds
> more plausible. This is a bit of a bikeshed.
Changed to 10ms.
> It's a pity SDL doesn't allow you to wait for either an SDL event or
> an fd to become readable. Could you do something like spawn a thread
> which does the selects in a loop, and then SDL_PushEvent()s a user
> event when the fd becomes readable?
>
> Admittedly, SDL_WaitEvent also contains this kind of loop-with-sleep,
> but it'd reduce the number of magic tunables a bit.
Added a comment explaining the clunkiness and sketching the solution
you proposed.
>> + }
>> +
>> + xenfb_delete(xenfb);
>> +
>> + SDL_Quit();
>> +
>> + return 0;
>> +}
>> --- b/tools/xenfb/vncfb.c Sat Sep 02 15:19:25 2006 -0400
>> +++ b/tools/xenfb/vncfb.c Sat Sep 02 15:22:19 2006 -0400
>
> Minor nit: generally, putting a vnc_ prefix on these functions
> confused me, since it looks like they should be in libvncserver. This
> may just be because I'm not paying enough attention.
>
>> @@ -0,0 +1,245 @@
>> +#define _GNU_SOURCE
>> +#include <errno.h>
>> +#include <getopt.h>
>> +#include <stdlib.h>
>> +#include <unistd.h>
>> +#include <malloc.h>
>> +#include <rfb/rfb.h>
>> +#include <xs.h>
>> +#include "xenfb.h"
>> +
>> +static void on_kbd_event(rfbBool down, rfbKeySym keycode, rfbClientPtr cl)
>> +{
>> + extern uint32_t gdk_linux_mapping[0x10000];
> Is there any chance of moving this into a header file somewhere?
I moved the table into this file instead.
>> + rfbScreenInfoPtr server = cl->screen;
>> + struct xenfb *xenfb = server->screenData;
>> + xenfb_send_key(xenfb, down, gdk_linux_mapping[keycode & 0xFFFF]);
>> +}
>> +
>> +static void on_ptr_event(int buttonMask, int x, int y, rfbClientPtr cl)
>> +{
>> + static int last_x = -1, last_y = -1;
>> + static int last_button = -1;
>> + rfbScreenInfoPtr server = cl->screen;
>> + struct xenfb *xenfb = server->screenData;
>> +
>> + if (last_button != -1) {
>> + int i;
>> +
>> + for (i = 0; i < 8; i++) {
>> + if ((last_button & (1 << i)) !=
>> + (buttonMask & (1 << i))) {
>> + printf("%d %d\n", buttonMask & (1 << i), i);
> Umm?
Anthony's debug code. Gone.
>> + xenfb_send_button(xenfb, buttonMask & (1 << i),
>> + 2 - i);
>> + }
>> + }
>> + }
>> +
>> + if (last_x != -1)
>> + xenfb_send_motion(xenfb, x - last_x, y - last_y);
>> +
>> + last_button = buttonMask;
>> +
>> + last_x = x;
>> + last_y = y;
>> +}
>> +
>> +static void xenstore_write_vncport(int port, int domid)
>> +{
>> + char *buf = NULL, *path;
>> + char *portstr = NULL;
>> + struct xs_handle *xsh = NULL;
>> +
>> + xsh = xs_daemon_open();
>> + if (xsh == NULL)
>> + return;
>> +
>> + path = xs_get_domain_path(xsh, domid);
>> + if (path == NULL) {
>> + fprintf(stderr, "xs_get_domain_path() error\n");
>> + goto out;
>> + }
>> +
>> + buf = malloc(256);
> Could fail. Also, consider using asprintf.
Jeremy took care of this.
>> + if (snprintf(buf, 256, "%s/console/vnc-port", path) == -1)
>> + goto out;
>> +
>> + portstr = malloc(10);
> Why is this on the heap rather than the stack?
Jeremy took care of this.
>> + if (snprintf(portstr, 10, "%d", port) == -1)
>> + goto out;
>> +
>> + if (xs_write(xsh, XBT_NULL, buf, portstr, strlen(portstr)) == 0)
>> + fprintf(stderr, "xs_write() vncport failed\n");
>> +
>> + out:
>> + free(portstr);
>> + free(buf);
>> +}
>> +
>> +
>> +static void vnc_update(struct xenfb *xenfb, int x, int y, int w, int h)
>> +{
>> + rfbScreenInfoPtr server = xenfb->user_data;
>> + rfbMarkRectAsModified(server, x, y, x + w, y + h);
>> +}
>> +
>> +static int vnc_start_viewer(int port)
> I'm not convinced the backend server process is the best place to
> start the viewer from. Perhaps xend would be a better choice? Not
> sure about this.
Jeremy answered this one.
>> +{
>> + int pid;
>> + char s[16];
>> +
>> + snprintf(s, 16, ":%d", port);
>> + switch (pid = fork()) {
>> + case -1:
>> + fprintf(stderr, "vncviewer failed fork\n");
>> + exit(1);
> err()?
>
>> +
>> + case 0: /* child */
>> + execlp("vncviewer", "vncviewer", s, 0);
>> + fprintf(stderr, "vncviewer execlp failed\n");
>> + exit(1);
> err()?
>
>> +
>> + default:
>> + return pid;
> This is ignored. Also, the parent process makes no attempt to check
> whether the child was exec()ed successfully or anything along those
> lines. This is enough of a pain to fix that I'd probably just ignore
> it, though.
Agreed.
>> + }
>> +}
>> +
>> +static struct option options[] = {
>> + { "domid", 1, NULL, 'd' },
>> + { "vncport", 1, NULL, 'p' },
>> + { "title", 1, NULL, 't' },
>> + { "unused", 0, NULL, 'u' },
> What does this do?
Jeremy?
>> + { "listen", 1, NULL, 'l' },
>> + { "vncviewer", 0, NULL, 'v' },
>> +};
>> +
>> +int main(int argc, char **argv)
>> +{
>> + rfbScreenInfoPtr server;
>> + char *fake_argv[7] = { "vncfb", "-rfbport", "5901",
>> + "-desktop", "xen-vncfb",
>> + "-listen", "0.0.0.0" };
>> + int fake_argc = sizeof(fake_argv) / sizeof(fake_argv[0]);
>> + int domid = -1, port = -1;
>> + char * title = NULL;
>> + char * listen = NULL;
> Whitespace is a bit funny again.
Fixed.
>> + struct xenfb *xenfb;
>> + fd_set readfds;
>> + int fd;
>> + char buffer[1024];
> Could do with a better name, and is larger than it needs to be.
Jeremy took care of this.
>> + int opt;
>> + bool unused = FALSE;
> You're inconsistent about the capitalisation of bools.
Jeremy took care of this.
>> + bool viewer = FALSE;
>> +
>> + while ((opt = getopt_long(argc, argv, "d:p:t:u", options,
>> + NULL)) != -1) {
>> + switch (opt) {
>> + case 'd':
>> + domid = strtol(optarg, NULL, 10);
> It would be nice to sanity check the argument here.
Done.
>> + break;
>> + case 'p':
>> + port = strtol(optarg, NULL, 10);
> Again.
Done.
>> + break;
>> + case 't':
>> + title = strdup(optarg);
> Can fail.
>
>> + break;
>> + case 'u':
>> + unused = TRUE;
>> + break;
>> + case 'l':
>> + listen = strdup(optarg);
> Can fail.
>
>> + break;
>> + case 'v':
>> + viewer = TRUE;
>> + break;
>> + case 'l':
>> + listen = strdup(optarg);
> Can fail.
>
>> + break;
>> + }
>> + }
>> + if (optind != argc) {
>> + fprintf(stderr, "Invalid options!\n");
>> + exit(1);
>> + }
>> + if (domid == -1) {
>> + fprintf(stderr, "Domain ID must be specified!\n");
>> + exit(1);
>> + }
>> +
>> + if (port == -1)
>> + port = 5900 + domid;
>> + snprintf(buffer, sizeof(buffer), "%d", port);
>> + fake_argv[2] = buffer;
>> +
>> + if (title != NULL)
>> + fake_argv[4] = title;
>> +
>> + if (listen != NULL)
>> + fake_argv[6] = listen;
>> +
>> + if (listen != NULL)
>> + fake_argv[6] = listen;
> Umm... What's going on here?
Jeremy took care of this.
>> +
>> + xenfb = xenfb_new();
>> + if (xenfb == NULL) {
>> + fprintf(stderr, "Could not create framebuffer (%s)\n",
>> + strerror(errno));
>> + exit(1);
>> + }
>> +
>> + if (!xenfb_attach_dom(xenfb, domid)) {
>> + fprintf(stderr, "Could not connect to domain (%s)\n",
>> + strerror(errno));
>> + exit(1);
>> + }
>> +
>> + server = rfbGetScreen(&fake_argc, fake_argv,
>> + xenfb->width, xenfb->height,
>> + 8, 3, xenfb->depth / 8);
>> + if (server == NULL) {
>> + fprintf(stderr, "Could not create VNC server\n");
>> + exit(1);
>> + }
>> +
>> + xenfb->user_data = server;
>> + xenfb->update = vnc_update;
>> +
>> + if (unused)
>> + server->autoPort = TRUE;
>> +
>> + server->serverFormat.redShift = 16;
>> + server->serverFormat.greenShift = 8;
>> + server->serverFormat.blueShift = 0;
>> + server->kbdAddEvent = on_kbd_event;
>> + server->ptrAddEvent = on_ptr_event;
>> + server->frameBuffer = (char *)xenfb->pixels;
>> + server->screenData = xenfb;
>> + rfbInitServer(server);
>> +
>> + rfbRunEventLoop(server, -1, TRUE);
>> +
>> + fd = xenfb_get_fileno(xenfb);
>> +
>> + FD_ZERO(&readfds);
>> + FD_SET(fd, &readfds);
>> +
>> + xenstore_write_vncport(server->port, domid);
>> +
>> + if (viewer)
>> + vnc_start_viewer(server->port);
>> +
>> + while (select(fd + 1, &readfds, NULL, NULL, NULL) != -1) {
>> + if (FD_ISSET(fd, &readfds)) {
>> + xenfb_on_incoming(xenfb);
>> + }
>> +
>> + FD_ZERO(&readfds);
>> + FD_SET(fd, &readfds);
>> + }
>> +
>> + rfbScreenCleanup(server);
>> + xenfb_delete(xenfb);
>> +
>> + return 0;
>> +}
>> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
>> +++ b/tools/xenfb/xenfb.c Sat Sep 02 15:19:25 2006 -0400
>> @@ -0,0 +1,434 @@
>> +#include <malloc.h>
>> +#include <stdlib.h>
>> +#include <sys/types.h>
>> +#include <fcntl.h>
>> +#include <unistd.h>
>> +#include <xenctrl.h>
>> +#include <linux/xenfb.h>
>> +#include <linux/xenkbd.h>
>> +#include <sys/select.h>
>> +#include <stdbool.h>
>> +#include <xen/linux/evtchn.h>
>> +#include <xen/event_channel.h>
>> +#include <sys/mman.h>
>> +#include <errno.h>
>> +#include <stdio.h>
>> +#include <string.h>
>> +#include <time.h>
>> +#include <xs.h>
>> +
>> +#include "xenfb.h"
>> +
>> +// FIXME defend against malicous backend?
> Well, this is the backend, so defending against a malicious frontend
> would be a better choice.
Thanks.
>> +
>> +struct xenfb_private
>> +{
>> + struct xenfb pub;
>> + int domid;
>> + unsigned long fbdev_mfn, kbd_mfn;
>> + int fbdev_evtchn, kbd_evtchn;
>> + evtchn_port_t fbdev_port, kbd_port;
> How do {fbdev,kbd}_port differ from {fbdev,kbd}_evtchn?
Jeremy answered this one.
> The _evtchn fields are only ever accessed from xenfb_attach_dom. Could
> they be locals to that function?
Done.
>> + int evt_xch;
>> + int xc;
>> + unsigned char *fb;
>> + struct xenfb_page *fb_info;
>> + struct xenkbd_info *kbd_info;
>> + unsigned long *fbmfns;
>> + int n_fbmfns, n_fbdirs;
>> +};
>> +
>> +struct xenfb *xenfb_new(void)
>> +{
>> + struct xenfb_private *xenfb = malloc(sizeof(*xenfb));
>> +
>> + if (xenfb == NULL)
>> + return NULL;
>> +
>> + memset(xenfb, 0, sizeof(*xenfb));
> Use calloc instead of malloc, perhaps?
Hate it.
>> +
>> + xenfb->domid = -1;
>> +
>> + xenfb->evt_xch = xc_evtchn_open();
>> + if (xenfb->evt_xch == -1) {
>> + int serrno = errno;
>> + free(xenfb);
>> + errno = serrno;
>> + return NULL;
>> + }
>> +
>> + xenfb->xc = xc_interface_open();
>> + if (xenfb->xc == -1) {
>> + int serrno = errno;
>> + xc_evtchn_close(xenfb->evt_xch);
>> + free(xenfb);
>> + errno = serrno;
>> + return NULL;
> It's a pity we don't have a macro which hides this ugliness. Perhaps
>
> #define PRESERVING_ERRNO(x) do {
> int tmp = errno;
> x;
> errno = tmp;
> } while (0)
>
> You could then do something like
>
> if (xenfb_evt_sch == -1) {
> PRESERVING_ERRNO(xc_evtchn_close(xenfb->evt_xch);free(xenfb));
> return NULL;
> }
>
> Not sure whether that's more or less ugly, to be honest.
I think I prefer my poison straight here, without macro wrapping :)
>> + }
>> +
>> + return &xenfb->pub;
>> +}
>> +
>> +int xenfb_get_fileno(struct xenfb *xenfb_pub)
>> +{
>> + struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
>> +
>> + return xc_evtchn_fd(xenfb->evt_xch);
>> +}
>> +
>> +static void xenfb_detach_dom(struct xenfb_private *xenfb)
>> +{
>> + xenfb->domid = -1;
>> + munmap(xenfb->fb, xenfb->fb_info->mem_length);
>> + munmap(xenfb->fb_info, XC_PAGE_SIZE);
>> + munmap(xenfb->kbd_info, XC_PAGE_SIZE);
>> + xc_evtchn_unbind(xenfb->evt_xch, xenfb->fbdev_port);
>> + xc_evtchn_unbind(xenfb->evt_xch, xenfb->kbd_port);
>> +}
>> +
>> +void xenfb_delete(struct xenfb *xenfb_pub)
>> +{
>> + struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
>> + if (xenfb->domid != -1)
>> + xenfb_detach_dom(xenfb);
>> + free(xenfb);
>> +}
>> +
>> +static int xenfb_fb_event(struct xenfb_private *xenfb, union xenfb_in_event
>> *event)
>> +{
>> + uint32_t prod;
>> + struct xenfb_page *info = xenfb->fb_info;
>> +
>> + prod = info->in_prod;
>> + if (prod - info->in_cons == XENFB_IN_RING_LEN) {
>> + errno = EAGAIN;
>> + return -1;
>> + }
>> +
>> + mb(); /* ensure ring space available */
>> + XENFB_IN_RING_REF(info, prod) = *event;
>> + wmb(); /* ensure ring contents visible */
>> + info->in_prod = prod + 1;
>> + return xc_evtchn_notify(xenfb->evt_xch, xenfb->fbdev_port);
>> +}
>> +
>> +static int xenfb_kbd_event(struct xenfb_private *xenfb, union
>> xenkbd_in_event *event)
>> +{
>> + uint32_t prod;
>> + struct xenkbd_info *info = xenfb->kbd_info;
>> +
>> + prod = info->in_prod;
>> + if (prod - info->in_cons == XENKBD_IN_RING_LEN) {
>> + errno = EAGAIN;
>> + return -1;
>> + }
>> +
>> + mb(); /* ensure ring space available */
>> + XENKBD_IN_RING_REF(info, prod) = *event;
>> + wmb(); /* ensure ring contents visible */
>> + info->in_prod = prod + 1;
>> + return xc_evtchn_notify(xenfb->evt_xch, xenfb->kbd_port);
>> +}
>> +
>> +static char *xenfb_path_in_dom(struct xs_handle *h,
>> + unsigned domid, const char *path,
>> + char *buffer, size_t size)
>> +{
>> + char *domp = xs_get_domain_path(h, domid);
> Can fail.
Jeremy took care of this.
>> + int n = snprintf(buffer, size, "%s/%s", domp, path);
>> + free(domp);
>> + if (n >= size)
>> + return NULL;
>> + return buffer;
>> +}
>> +
>> +static int xenfb_xs_scanf1(struct xs_handle *xsh, unsigned domid,
>> + const char *path, const char *fmt,
>> + void *dest)
>> +{
>> + char buffer[1024];
>> + char *p;
>> + int ret;
>> +
>> + p = xenfb_path_in_dom(xsh, domid, path, buffer, sizeof(buffer));
> What happens if this fails?
Catched.
>> + p = xs_read(xsh, XBT_NULL, p, NULL);
>> + if (!p)
>> + return -ENOENT;
>> + ret = sscanf(p, fmt, dest);
>> + free(p);
>> + if (ret != 1)
>> + return -EDOM;
>> + return 0;
>> +}
> You're somewhat inconsistent about returning error numbers as negative
> return values or through errno. I'd prefer the latter in userspace
> code, but it doesn't matter too much, privided you pick one.
Jeremy took care of this.
>> +
>> +bool xenfb_attach_dom(struct xenfb *xenfb_pub, int domid)
>> +{
>> + struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
>> + char buffer[1024];
>> + struct xs_handle *xsh;
>> + unsigned dummy;
>> + int ret;
>> + char *p, **vec;
>> + union xenfb_in_event event;
>> +
>> + if (xenfb->domid != -1) {
>> + xenfb_detach_dom(xenfb);
>> + if (domid == -1)
>> + return true;
>> + }
>> +
>> + xsh = xs_daemon_open_readonly();
>> + if (!xsh)
>> + goto error;
>> +
>> + p = xenfb_path_in_dom(xsh, domid, "vfb", buffer, sizeof(buffer));
>> + if (!xs_watch(xsh, p, ""))
>> + goto error;
>> + p = xenfb_path_in_dom(xsh, domid, "vkbd", buffer, sizeof(buffer));
>> + if (!xs_watch(xsh, p, ""))
>> + goto error;
>> +
>> + for (;;) {
>> + ret = xenfb_xs_scanf1(xsh, domid, "vfb/page-ref", "%lu",
>> + &xenfb->fbdev_mfn);
>> + if (ret == -ENOENT || ret == -EAGAIN)
> xenfb_xs_scanf can't return -EAGAIN. What are you trying to achieve
> here?
Jeremy took care of this.
>> + goto wait;
>> + if (ret < 0)
>> + goto error;
>> + ret = xenfb_xs_scanf1(xsh, domid, "vfb/event-channel", "%u",
>> + &xenfb->fbdev_evtchn);
>> + if (ret == -ENOENT || ret == -EAGAIN)
>> + goto wait;
>> + if (ret < 0)
>> + goto error;
>> + ret = xenfb_xs_scanf1(xsh, domid, "vkbd/page-ref", "%lu",
>> + &xenfb->kbd_mfn);
>> + if (ret == -ENOENT || ret == -EAGAIN)
>> + goto wait;
>> + if (ret < 0)
>> + goto error;
>> + ret = xenfb_xs_scanf1(xsh, domid, "vkbd/event-channel", "%u",
>> + &xenfb->kbd_evtchn);
>> + if (ret == -ENOENT || ret == -EAGAIN)
>> + goto wait;
>> + if (ret < 0)
>> + goto error;
>> + break;
>> +
>> + wait:
>> + printf("Waiting...\n");
> Where does this message go?
Jeremy answered this one.
>> + vec = xs_read_watch(xsh, &dummy);
>> + if (!vec)
>> + goto error;
>> + free(vec);
>> + }
>> + xs_daemon_close(xsh);
>> + xsh = NULL;
>> +
>> + xenfb->fbdev_port = xc_evtchn_bind_interdomain(xenfb->evt_xch, domid,
>> + xenfb->fbdev_evtchn);
>> + if (xenfb->fbdev_port == -1)
>> + goto error;
>> +
>> + xenfb->kbd_port = xc_evtchn_bind_interdomain(xenfb->evt_xch, domid,
>> + xenfb->kbd_evtchn);
>> + if (xenfb->kbd_port == -1)
>> + goto error_fbdev;
>> +
>> + xenfb->fb_info = xc_map_foreign_range(xenfb->xc, domid, XC_PAGE_SIZE,
>> + PROT_READ | PROT_WRITE,
>> + xenfb->fbdev_mfn);
>> + if (xenfb->fb_info == NULL)
>> + goto error_kbd;
>> +
>> + xenfb->kbd_info = xc_map_foreign_range(xenfb->xc, domid, XC_PAGE_SIZE,
>> + PROT_READ | PROT_WRITE,
>> + xenfb->kbd_mfn);
>> + if (xenfb->kbd_info == NULL)
>> + goto error_fbinfo;
>> +
>> + xenfb->n_fbmfns = (xenfb->fb_info->mem_length + (XC_PAGE_SIZE - 1)) /
>> XC_PAGE_SIZE;
>> + xenfb->n_fbdirs = xenfb->n_fbmfns * sizeof(unsigned long);
>> + xenfb->n_fbdirs = (xenfb->n_fbdirs + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
>> +
>> + xenfb->fbmfns = xc_map_foreign_batch(xenfb->xc, domid, PROT_READ,
>> xenfb->fb_info->pd, xenfb->n_fbdirs);
>> + if (xenfb->fbmfns == NULL)
>> + goto error_kbdinfo;
>> +
>> + xenfb->fb = xc_map_foreign_batch(xenfb->xc, domid, PROT_READ |
>> PROT_WRITE, xenfb->fbmfns, xenfb->n_fbmfns);
>> + if (xenfb->fb == NULL)
>> + goto error_fbmfns;
>> +
>> + event.type = XENFB_TYPE_SET_EVENTS;
>> + event.set_events.flags = XENFB_FLAG_UPDATE;
>> + if (xenfb_fb_event(xenfb, &event))
>> + goto error_fb;
>> +
>> + munmap(xenfb->fbmfns, xenfb->n_fbdirs * XC_PAGE_SIZE);
> Please make fbmfns a local rather than putting it in the info
> structure.
Done.
>> +
>> + xenfb->domid = domid;
>> +
>> + xenfb->pub.pixels = xenfb->fb;
>> +
>> + xenfb->pub.row_stride = xenfb->fb_info->line_length;
>> + xenfb->pub.depth = xenfb->fb_info->depth;
>> + xenfb->pub.width = xenfb->fb_info->width;
>> + xenfb->pub.height = xenfb->fb_info->height;
>> +
>> + return true;
>> +
>> + error_fb:
> The error path here is utterly revolting. Perhaps something like this:
>
> error:
> serrno = errno;
> if (xenfb->fb)
> munmap(xenfb->fb, xenfb->fb_info->mem_length);
> if (fbmfns)
> munmap(fbmfns, xenfb->fb_info->mem_length);
> ...
> errno = serrno;
>
> return false;
>
> Or would that be too easy?
Done.
>> + printf("%d\n", __LINE__);
>> + {
>> + int serrno = errno;
>> + munmap(xenfb->fb, xenfb->fb_info->mem_length);
>> + errno = serrno;
>> + }
>> + error_fbmfns:
>> + printf("%d\n", __LINE__);
>> + {
>> + int serrno = errno;
>> + munmap(xenfb->fbmfns, xenfb->n_fbdirs * XC_PAGE_SIZE);
>> + errno = serrno;
>> + }
>> + error_kbdinfo:
>> + printf("%d\n", __LINE__);
>> + {
>> + int serrno = errno;
>> + munmap(xenfb->kbd_info, XC_PAGE_SIZE);
>> + errno = serrno;
>> + }
>> + error_fbinfo:
>> + printf("%d\n", __LINE__);
>> + {
>> + int serrno = errno;
>> + munmap(xenfb->fb_info, XC_PAGE_SIZE);
>> + errno = serrno;
>> + }
>> + error_kbd:
>> + printf("%d\n", __LINE__);
>> + {
>> + int serrno = errno;
>> + xc_evtchn_unbind(xenfb->evt_xch, xenfb->kbd_port);
>> + errno = serrno;
>> + }
>> + error_fbdev:
>> + printf("%d\n", __LINE__);
>> + {
>> + int serrno = errno;
>> + xc_evtchn_unbind(xenfb->evt_xch, xenfb->fbdev_port);
>> + errno = serrno;
>> + }
>> + error:
>> + printf("%d\n", __LINE__);
>> + if (xsh) {
>> + int serrno = errno;
>> + xs_daemon_close(xsh);
> I think you may end up closing the connection to the daemon twice here.
Don't think so, because xsh is cleared on the other close.
>> + errno = serrno;
>> + }
>> +
>> + return false;
>> +}
>> +
>> +static void xenfb_update(struct xenfb_private *xenfb, int x, int y, int
>> width, int height)
>> +{
>> + if (xenfb->pub.update)
>> + xenfb->pub.update(&xenfb->pub, x, y, width, height);
>> +}
> I'm not convinced this wrapper is actually needed, given that it's
> utterly trivial and only called from one place.
It's gone.
>> +
>> +static void xenfb_on_fb_event(struct xenfb_private *xenfb)
>> +{
>> + uint32_t prod, cons;
>> + struct xenfb_page *info = xenfb->fb_info;
>> +
>> + prod = info->out_prod;
>> + rmb(); /* ensure we see ring contents up to prod */
>> + for (cons = info->out_cons; cons != prod; cons++) {
>> + union xenfb_out_event *event = &XENFB_OUT_RING_REF(info, cons);
>> +
>> + switch (event->type) {
>> + case XENFB_TYPE_UPDATE:
>> + xenfb_update(xenfb, event->update.x, event->update.y,
>> event->update.width, event->update.height);
>> + break;
>> + }
>> + }
>> + mb(); /* ensure we're done with ring contents */
>> + info->out_cons = cons;
>> + // FIXME need to notify?
> Maybe. If there's any possibility of the frontend queuing evetns when
> the ring is full, yes. It doesn't at the moment, but if you want to
> add it in the future and maintain forward compatibility you need it.
Added the notify.
>> +}
>> +
>> +static void xenfb_on_kbd_event(struct xenfb_private *xenfb)
>> +{
>> + uint32_t prod, cons;
>> + struct xenkbd_info *info = xenfb->kbd_info;
>> +
>> + prod = info->out_prod;
>> + rmb(); /* ensure we see ring contents up to prod */
>> + for (cons = info->out_cons; cons != prod; cons++) {
>> + union xenkbd_out_event *event = &XENKBD_OUT_RING_REF(info,
>> cons);
>> +
>> + switch (event->type) {
>> + default:
>> + break;
>> + }
>> + }
>> + mb(); /* ensure we're done with ring contents */
>> + info->out_cons = cons;
>> + // FIXME need to notify?
>> +}
>
> I'd replace this with
>
> +static void xenfb_on_kbd_event(struct xenfb_private *xenfb)
> +{
> + struct xenkbd_info *info = xenfb->kbd_info;
> + /* We don't understand any keyboard events, so just ignore them. */
> + info->out_cons = info->out_prod;
> +}
>
> It's smaller, easier to understand, and more efficient.
Taken.
> As for the FIXME, the protocol spec says you need it, but I'm not sure
> it's actually all that useful. It will only make any difference if
> the frontend starts queueing keyboard events if it finds the queue to
> be full when it tries to send one.
Added the notify.
>> +
>> +int xenfb_on_incoming(struct xenfb *xenfb_pub)
>> +{
>> + struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
>> + evtchn_port_t port;
>> +
>> + port = xc_evtchn_pending(xenfb->evt_xch);
>> + if (port == -1)
>> + return -1;
>> +
>> + if (port == xenfb->fbdev_port) {
>> + xenfb_on_fb_event(xenfb);
>> + } else if (port == xenfb->kbd_port) {
>> + xenfb_on_kbd_event(xenfb);
>> + }
>> +
>> + if (xc_evtchn_unmask(xenfb->evt_xch, port) == -1)
>> + return -1;
>> +
>> + return 0;
>> +}
>> +
>> +int xenfb_send_key(struct xenfb *xenfb_pub, bool down, int keycode)
>> +{
>> + struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
>> + union xenkbd_in_event event;
>> +
>> + event.type = XENKBD_TYPE_KEY;
>> + event.key.pressed = down ? 1 : 0;
>> + event.key.keycode = keycode;
>> +
>> + return xenfb_kbd_event(xenfb, &event);
>> +}
>> +
>> +int xenfb_send_motion(struct xenfb *xenfb_pub, int rel_x, int rel_y)
> Is this sending XENKBD_TYPE_MOTION or XENFB_TYPE_MOTION?
XENFB_TYPE_MOTION doesn't exist anymore.
>> +{
>> + struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
>> + union xenkbd_in_event event;
>> +
>> + event.type = XENKBD_TYPE_MOTION;
>> + event.motion.rel_x = rel_x;
>> + event.motion.rel_y = rel_y;
>> +
>> + return xenfb_kbd_event(xenfb, &event);
>> +}
>> +
>> +int xenfb_send_button(struct xenfb *xenfb_pub, bool down, int button)
>> +{
>> + struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
>> + union xenkbd_in_event event;
>> +
>> + event.type = XENKBD_TYPE_BUTTON;
>> + event.button.pressed = down ? 1 : 0;
>> + event.button.button = button;
>> +
>> + return xenfb_kbd_event(xenfb, &event);
>> +}
>> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
>> +++ b/tools/xenfb/xenfb.h Sat Sep 02 15:19:25 2006 -0400
>> @@ -0,0 +1,33 @@
>> +#ifndef _XENFB_H_
>> +#define _XENFB_H_
>> +
>> +#include <stdbool.h>
>> +#include <stdint.h>
>> +
>> +struct xenfb
>> +{
>> + uint8_t *pixels;
>> +
>> + int row_stride;
>> + int depth;
>> + int width;
>> + int height;
>> +
>> + void *user_data;
>> +
>> + void (*update)(struct xenfb *xenfb, int x, int y, int width, int
>> height);
>> +};
>> +
>> +struct xenfb *xenfb_new(void);
>> +void xenfb_delete(struct xenfb *xenfb);
>> +
>> +bool xenfb_attach_dom(struct xenfb *xenfb, int domid);
>> +
>> +int xenfb_get_fileno(struct xenfb *xenfb);
>> +int xenfb_on_incoming(struct xenfb *xenfb);
>> +
>> +int xenfb_send_key(struct xenfb *xenfb, bool down, int keycode);
>> +int xenfb_send_motion(struct xenfb *xenfb, int rel_x, int rel_y);
>> +int xenfb_send_button(struct xenfb *xenfb, bool down, int button);
>> +
>> +#endif
>
> Steven.
Okay, here's the next patch. It doesn't yet take care of shadow
translate mode, just because I want to get it out of the door. Next
week, I hope...
Oh, and it also doesn't include Daniel Berrange's locking fixes to
LibVNCServer, which you really, really need:
http://lists.xensource.com/archives/html/xen-devel/2006-09/msg00371.html
diff -r 9977b8785570 tools/Makefile
--- a/tools/Makefile Fri Sep 29 19:12:15 2006 +0100
+++ b/tools/Makefile Sat Sep 30 09:29:38 2006 +0200
@@ -18,6 +18,7 @@ SUBDIRS-y += xenstat
SUBDIRS-y += xenstat
SUBDIRS-y += libaio
SUBDIRS-y += blktap
+SUBDIRS-y += xenfb
# These don't cross-compile
ifeq ($(XEN_COMPILE_ARCH),$(XEN_TARGET_ARCH))
diff -r 9977b8785570 tools/xenfb/Makefile
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/xenfb/Makefile Sat Sep 30 09:29:38 2006 +0200
@@ -0,0 +1,33 @@
+XEN_ROOT=../..
+include $(XEN_ROOT)/tools/Rules.mk
+
+CFLAGS += -I$(XEN_LIBXC) -I$(XEN_XENSTORE)
-I$(XEN_ROOT)/linux-2.6-xen-sparse/include
+LDFLAGS += -L$(XEN_LIBXC) -L$(XEN_XENSTORE)
+
+INSTALL = install
+INSTALL_PROG = $(INSTALL) -m0755
+INSTALL_DIR = $(INSTALL) -d -m0755
+
+.PHONY: all
+all: build
+
+.PHONY: build
+build: mk-symlinks
+ $(MAKE) vncfb sdlfb
+
+install: all
+ $(INSTALL_DIR) -p $(DESTDIR)/usr/$(LIBDIR)/xen/bin
+ $(INSTALL_PROG) vncfb $(DESTDIR)/usr/$(LIBDIR)/xen/bin/xen-vncfb
+ $(INSTALL_PROG) sdlfb $(DESTDIR)/usr/$(LIBDIR)/xen/bin/xen-sdlfb
+
+sdlfb: sdlfb.o xenfb.o
+
+sdlfb.o: CFLAGS += $(shell sdl-config --cflags)
+sdlfb: LDLIBS += $(shell sdl-config --libs) -lxenctrl -lxenstore
+
+clean:
+ $(RM) *.o *~ vncfb sdlfb
+
+vncfb: vncfb.o xenfb.o
+vncfb.o: CFLAGS += $(shell libvncserver-config --cflags) $(shell pkg-config
--cflags gtk+-2.0)
+vncfb: LDLIBS += $(shell libvncserver-config --libs) -lxenctrl -lxenstore
diff -r 9977b8785570 tools/xenfb/sdlfb.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/xenfb/sdlfb.c Sat Sep 30 09:29:38 2006 +0200
@@ -0,0 +1,216 @@
+#include <SDL.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <stdlib.h>
+#include <linux/input.h>
+#include <getopt.h>
+#include <string.h>
+#include "xenfb.h"
+
+struct SDLFBData
+{
+ SDL_Surface *dst;
+ SDL_Surface *src;
+};
+
+void sdl_update(struct xenfb *xenfb, int x, int y, int width, int height)
+{
+ struct SDLFBData *data = xenfb->user_data;
+ SDL_Rect r = { x, y, width, height };
+ SDL_BlitSurface(data->src, &r, data->dst, &r);
+ SDL_UpdateRect(data->dst, x, y, width, height);
+}
+
+int sdl2linux[1024] = {
+ [SDLK_a] = KEY_A,
+ [SDLK_b] = KEY_B,
+ [SDLK_c] = KEY_C,
+ [SDLK_d] = KEY_D,
+ [SDLK_e] = KEY_E,
+ [SDLK_f] = KEY_F,
+ [SDLK_g] = KEY_G,
+ [SDLK_h] = KEY_H,
+ [SDLK_i] = KEY_I,
+ [SDLK_j] = KEY_J,
+ [SDLK_k] = KEY_K,
+ [SDLK_l] = KEY_L,
+ [SDLK_m] = KEY_M,
+ [SDLK_n] = KEY_N,
+ [SDLK_o] = KEY_O,
+ [SDLK_p] = KEY_P,
+ [SDLK_q] = KEY_Q,
+ [SDLK_r] = KEY_R,
+ [SDLK_s] = KEY_S,
+ [SDLK_t] = KEY_T,
+ [SDLK_u] = KEY_U,
+ [SDLK_v] = KEY_V,
+ [SDLK_w] = KEY_W,
+ [SDLK_x] = KEY_X,
+ [SDLK_y] = KEY_Y,
+ [SDLK_z] = KEY_Z,
+ [SDLK_0] = KEY_0,
+ [SDLK_1] = KEY_1,
+ [SDLK_2] = KEY_2,
+ [SDLK_3] = KEY_3,
+ [SDLK_4] = KEY_4,
+ [SDLK_5] = KEY_5,
+ [SDLK_6] = KEY_6,
+ [SDLK_7] = KEY_7,
+ [SDLK_8] = KEY_8,
+ [SDLK_9] = KEY_9,
+ [SDLK_SPACE] = KEY_SPACE,
+ [SDLK_RETURN] = KEY_ENTER,
+ [SDLK_PERIOD] = KEY_DOT,
+ [SDLK_SLASH] = KEY_SLASH,
+ [SDLK_BACKSPACE] = KEY_BACKSPACE,
+ [SDLK_TAB] = KEY_TAB,
+ [SDLK_LSHIFT] = KEY_LEFTSHIFT,
+ [SDLK_RSHIFT] = KEY_RIGHTSHIFT,
+ [SDLK_LALT] = KEY_LEFTALT,
+ [SDLK_RALT] = KEY_RIGHTALT,
+};
+
+static struct option options[] = {
+ { "domid", 1, NULL, 'd' },
+ { "title", 1, NULL, 't' },
+};
+
+int main(int argc, char **argv)
+{
+ struct xenfb *xenfb;
+ int fd;
+ int domid = -1;
+ char * title = NULL;
+ fd_set readfds;
+ struct SDLFBData data;
+ SDL_Rect r;
+ struct timeval tv;
+ SDL_Event event;
+ int do_quit = 0;
+ int opt;
+ char *endp = NULL;
+
+ while ((opt = getopt_long(argc, argv, "d:t:", options,
+ NULL)) != -1) {
+ switch (opt) {
+ case 'd':
+ domid = strtol(optarg, &endp, 10);
+ if (endp == optarg || *endp || errno) {
+ fprintf(stderr, "Invalid domain id
specified\n");
+ exit(1);
+ }
+ break;
+ case 't':
+ title = strdup(optarg);
+ break;
+ }
+ }
+ if (optind != argc) {
+ fprintf(stderr, "Invalid options!\n");
+ exit(1);
+ }
+ if (domid <= 0) {
+ fprintf(stderr, "Domain ID must be specified!\n");
+ exit(1);
+ }
+
+ xenfb = xenfb_new();
+ if (xenfb == NULL) {
+ fprintf(stderr, "Could not create framebuffer (%s)\n",
+ strerror(errno));
+ exit(1);
+ }
+
+ if (!xenfb_attach_dom(xenfb, domid)) {
+ fprintf(stderr, "Could not connect to domain (%s)\n",
+ strerror(errno));
+ exit(1);
+ }
+
+ SDL_Init(SDL_INIT_VIDEO);
+
+ fd = xenfb_get_fileno(xenfb);
+
+ data.dst = SDL_SetVideoMode(xenfb->width, xenfb->height, xenfb->depth,
+ SDL_SWSURFACE);
+
+ data.src = SDL_CreateRGBSurfaceFrom(xenfb->pixels,
+ xenfb->width, xenfb->height,
+ xenfb->depth, xenfb->row_stride,
+ 0xFF0000, 0xFF00, 0xFF, 0);
+
+ if (title == NULL)
+ title = strdup("xen-sdlfb");
+ SDL_WM_SetCaption(title, title);
+
+ r.x = r.y = 0;
+ r.w = xenfb->width;
+ r.h = xenfb->height;
+ SDL_BlitSurface(data.src, &r, data.dst, &r);
+ SDL_UpdateRect(data.dst, 0, 0, xenfb->width, xenfb->height);
+
+ xenfb->update = sdl_update;
+ xenfb->user_data = &data;
+
+ SDL_ShowCursor(0);
+
+ /*
+ * We need to wait for fd becoming ready or SDL events to
+ * arrive. We time out the select after 10ms to poll for SDL
+ * events. Clunky, but works. Could avoid the clunkiness
+ * with a separate thread.
+ */
+ for (;;) {
+ FD_ZERO(&readfds);
+ FD_SET(fd, &readfds);
+ tv = (struct timeval){0, 10000};
+
+ if (select(fd + 1, &readfds, NULL, NULL, &tv) < 0) {
+ if (errno == EINTR)
+ continue;
+ fprintf(stderr, "Connection to domain broke (%s)\n",
+ strerror(errno));
+ break;
+ }
+
+ while (SDL_PollEvent(&event)) {
+ switch (event.type) {
+ case SDL_KEYDOWN:
+ case SDL_KEYUP:
+ xenfb_send_key(xenfb,
+ event.type == SDL_KEYDOWN,
+ sdl2linux[event.key.keysym.sym]);
+ break;
+ case SDL_MOUSEMOTION: {
+ int x, y;
+ Uint8 button;
+
+ button = SDL_GetRelativeMouseState(&x, &y);
+ xenfb_send_motion(xenfb, x, y);
+ } break;
+ case SDL_MOUSEBUTTONDOWN:
+ case SDL_MOUSEBUTTONUP:
+ xenfb_send_button(xenfb,
+ event.type == SDL_MOUSEBUTTONDOWN,
+ 3 - event.button.button);
+ break;
+ case SDL_QUIT:
+ do_quit = 1;
+ break;
+ }
+ }
+
+ if (do_quit)
+ break;
+
+ if (FD_ISSET(fd, &readfds))
+ xenfb_on_incoming(xenfb);
+ }
+
+ xenfb_delete(xenfb);
+
+ SDL_Quit();
+
+ return 0;
+}
diff -r 9977b8785570 tools/xenfb/vncfb.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/xenfb/vncfb.c Sat Sep 30 09:29:38 2006 +0200
@@ -0,0 +1,402 @@
+#define _GNU_SOURCE
+#include <errno.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <malloc.h>
+#include <rfb/rfb.h>
+#include <gdk/gdkkeysyms.h>
+#include <linux/input.h>
+#include <xs.h>
+#include "xenfb.h"
+
+static uint32_t gdk_linux_mapping[0x10000] = {
+ [GDK_a] = KEY_A,
+ [GDK_b] = KEY_B,
+ [GDK_c] = KEY_C,
+ [GDK_d] = KEY_D,
+ [GDK_e] = KEY_E,
+ [GDK_f] = KEY_F,
+ [GDK_g] = KEY_G,
+ [GDK_h] = KEY_H,
+ [GDK_i] = KEY_I,
+ [GDK_j] = KEY_J,
+ [GDK_k] = KEY_K,
+ [GDK_l] = KEY_L,
+ [GDK_m] = KEY_M,
+ [GDK_n] = KEY_N,
+ [GDK_o] = KEY_O,
+ [GDK_p] = KEY_P,
+ [GDK_q] = KEY_Q,
+ [GDK_r] = KEY_R,
+ [GDK_s] = KEY_S,
+ [GDK_t] = KEY_T,
+ [GDK_u] = KEY_U,
+ [GDK_v] = KEY_V,
+ [GDK_w] = KEY_W,
+ [GDK_x] = KEY_X,
+ [GDK_y] = KEY_Y,
+ [GDK_z] = KEY_Z,
+ [GDK_A] = KEY_A,
+ [GDK_B] = KEY_B,
+ [GDK_C] = KEY_C,
+ [GDK_D] = KEY_D,
+ [GDK_E] = KEY_E,
+ [GDK_F] = KEY_F,
+ [GDK_G] = KEY_G,
+ [GDK_H] = KEY_H,
+ [GDK_I] = KEY_I,
+ [GDK_J] = KEY_J,
+ [GDK_K] = KEY_K,
+ [GDK_L] = KEY_L,
+ [GDK_M] = KEY_M,
+ [GDK_N] = KEY_N,
+ [GDK_O] = KEY_O,
+ [GDK_P] = KEY_P,
+ [GDK_Q] = KEY_Q,
+ [GDK_R] = KEY_R,
+ [GDK_S] = KEY_S,
+ [GDK_T] = KEY_T,
+ [GDK_U] = KEY_U,
+ [GDK_V] = KEY_V,
+ [GDK_W] = KEY_W,
+ [GDK_X] = KEY_X,
+ [GDK_Y] = KEY_Y,
+ [GDK_Z] = KEY_Z,
+ [GDK_0] = KEY_0,
+ [GDK_1] = KEY_1,
+ [GDK_2] = KEY_2,
+ [GDK_3] = KEY_3,
+ [GDK_4] = KEY_4,
+ [GDK_5] = KEY_5,
+ [GDK_6] = KEY_6,
+ [GDK_7] = KEY_7,
+ [GDK_8] = KEY_8,
+ [GDK_9] = KEY_9,
+ [GDK_Return] = KEY_ENTER,
+ [GDK_BackSpace] = KEY_BACKSPACE,
+ [GDK_Tab] = KEY_TAB,
+ [GDK_Pause] = KEY_PAUSE,
+ [GDK_Delete] = KEY_DELETE,
+ [GDK_slash] = KEY_SLASH,
+ [GDK_minus] = KEY_MINUS,
+ [GDK_equal] = KEY_EQUAL,
+ [GDK_Escape] = KEY_ESC,
+ [GDK_braceleft] = KEY_LEFTBRACE,
+ [GDK_braceright] = KEY_RIGHTBRACE,
+ [GDK_bracketleft] = KEY_LEFTMETA,
+ [GDK_bracketright] = KEY_RIGHTMETA,
+ [GDK_Control_L] = KEY_LEFTCTRL,
+ [GDK_Control_R] = KEY_RIGHTCTRL,
+ [GDK_Shift_L] = KEY_LEFTSHIFT,
+ [GDK_Shift_R] = KEY_RIGHTSHIFT,
+ [GDK_Alt_L] = KEY_LEFTALT,
+ [GDK_Alt_R] = KEY_RIGHTALT,
+ [GDK_semicolon] = KEY_SEMICOLON,
+ [GDK_apostrophe] = KEY_APOSTROPHE,
+ [GDK_grave] = KEY_GRAVE,
+ [GDK_backslash] = KEY_BACKSLASH,
+ [GDK_comma] = KEY_COMMA,
+ [GDK_period] = KEY_DOT,
+ [GDK_space] = KEY_SPACE,
+ [GDK_Caps_Lock] = KEY_CAPSLOCK,
+ [GDK_Num_Lock] = KEY_NUMLOCK,
+ [GDK_Scroll_Lock] = KEY_SCROLLLOCK,
+ [GDK_Sys_Req] = KEY_SYSRQ,
+ [GDK_Linefeed] = KEY_LINEFEED,
+ [GDK_Home] = KEY_HOME,
+ [GDK_Pause] = KEY_PAUSE,
+ [GDK_F1] = KEY_F1,
+ [GDK_F2] = KEY_F2,
+ [GDK_F3] = KEY_F3,
+ [GDK_F4] = KEY_F4,
+ [GDK_F5] = KEY_F5,
+ [GDK_F6] = KEY_F6,
+ [GDK_F7] = KEY_F7,
+ [GDK_F8] = KEY_F8,
+ [GDK_F9] = KEY_F9,
+ [GDK_F10] = KEY_F10,
+ [GDK_F11] = KEY_F11,
+ [GDK_F12] = KEY_F12,
+ [GDK_Up] = KEY_UP,
+ [GDK_Page_Up] = KEY_PAGEUP,
+ [GDK_Left] = KEY_LEFT,
+ [GDK_Right] = KEY_RIGHT,
+ [GDK_End] = KEY_END,
+ [GDK_Down] = KEY_DOWN,
+ [GDK_Page_Down] = KEY_PAGEDOWN,
+ [GDK_Insert] = KEY_INSERT,
+ [GDK_colon] = KEY_SEMICOLON,
+ [GDK_quotedbl] = KEY_APOSTROPHE,
+ [GDK_less] = KEY_COMMA,
+ [GDK_greater] = KEY_DOT,
+ [GDK_question] = KEY_SLASH,
+ [GDK_bar] = KEY_BACKSLASH,
+ [GDK_asciitilde] = KEY_GRAVE,
+ [GDK_exclam] = KEY_1,
+ [GDK_at] = KEY_2,
+ [GDK_numbersign] = KEY_3,
+ [GDK_dollar] = KEY_4,
+ [GDK_percent] = KEY_5,
+ [GDK_asciicircum] = KEY_6,
+ [GDK_ampersand] = KEY_7,
+ [GDK_asterisk] = KEY_8,
+ [GDK_parenleft] = KEY_9,
+ [GDK_parenright] = KEY_0,
+ [GDK_underscore] = KEY_MINUS,
+ [GDK_plus] = KEY_EQUAL,
+};
+
+static void on_kbd_event(rfbBool down, rfbKeySym keycode, rfbClientPtr cl)
+{
+ rfbScreenInfoPtr server = cl->screen;
+ struct xenfb *xenfb = server->screenData;
+ xenfb_send_key(xenfb, down, gdk_linux_mapping[keycode & 0xFFFF]);
+}
+
+static void on_ptr_event(int buttonMask, int x, int y, rfbClientPtr cl)
+{
+ static int last_x = -1, last_y = -1;
+ static int last_button = -1;
+ rfbScreenInfoPtr server = cl->screen;
+ struct xenfb *xenfb = server->screenData;
+
+ if (last_button != -1) {
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ if ((last_button & (1 << i)) !=
+ (buttonMask & (1 << i))) {
+ xenfb_send_button(xenfb, buttonMask & (1 << i),
+ 2 - i);
+ }
+ }
+ }
+
+ if (last_x != -1)
+ xenfb_send_motion(xenfb, x - last_x, y - last_y);
+
+ last_button = buttonMask;
+
+ last_x = x;
+ last_y = y;
+}
+
+static void xenstore_write_vncport(int port, int domid)
+{
+ char *buf = NULL, *path;
+ char portstr[10];
+ struct xs_handle *xsh = NULL;
+
+ xsh = xs_daemon_open();
+ if (xsh == NULL)
+ return;
+
+ path = xs_get_domain_path(xsh, domid);
+ if (path == NULL) {
+ fprintf(stderr, "Can't get domain path (%s)\n",
+ strerror(errno));
+ goto out;
+ }
+
+ if (asprintf(&buf, "%s/console/vnc-port", path) == -1) {
+ fprintf(stderr, "Can't make vncport path\n");
+ goto out;
+ }
+
+ if (snprintf(portstr, sizeof(portstr), "%d", port) == -1) {
+ fprintf(stderr, "Can't make vncport value\n");
+ goto out;
+ }
+
+ if (!xs_write(xsh, XBT_NULL, buf, portstr, strlen(portstr)))
+ fprintf(stderr, "Can't set vncport (%s)\n",
+ strerror(errno));
+
+out:
+ free(buf);
+}
+
+
+static void vnc_update(struct xenfb *xenfb, int x, int y, int w, int h)
+{
+ rfbScreenInfoPtr server = xenfb->user_data;
+ rfbMarkRectAsModified(server, x, y, x + w, y + h);
+}
+
+static int vnc_start_viewer(int port)
+{
+ int pid;
+ char s[16];
+
+ snprintf(s, sizeof(s), ":%d", port);
+ switch (pid = fork()) {
+ case -1:
+ fprintf(stderr, "vncviewer failed fork\n");
+ exit(1);
+
+ case 0: /* child */
+ execlp("vncviewer", "vncviewer", s, NULL);
+ fprintf(stderr, "vncviewer execlp failed\n");
+ exit(1);
+
+ default:
+ return pid;
+ }
+}
+
+static struct option options[] = {
+ { "domid", 1, NULL, 'd' },
+ { "vncport", 1, NULL, 'p' },
+ { "title", 1, NULL, 't' },
+ { "unused", 0, NULL, 'u' },
+ { "listen", 1, NULL, 'l' },
+ { "vncviewer", 0, NULL, 'v' },
+};
+
+int main(int argc, char **argv)
+{
+ rfbScreenInfoPtr server;
+ char *fake_argv[7] = { "vncfb", "-rfbport", "5901",
+ "-desktop", "xen-vncfb",
+ "-listen", "0.0.0.0" };
+ int fake_argc = sizeof(fake_argv) / sizeof(fake_argv[0]);
+ int domid = -1, port = -1;
+ char *title = NULL;
+ char *listen = NULL;
+ struct xenfb *xenfb;
+ fd_set readfds;
+ int fd;
+ char portstr[10];
+ int opt;
+ bool unused = false;
+ bool viewer = false;
+ char *endp = NULL;
+
+ while ((opt = getopt_long(argc, argv, "d:p:t:u", options,
+ NULL)) != -1) {
+ switch (opt) {
+ case 'd':
+ errno = 0;
+ domid = strtol(optarg, &endp, 10);
+ if (endp == optarg || *endp || errno) {
+ fprintf(stderr, "Invalid domain id
specified\n");
+ exit(1);
+ }
+ break;
+ case 'p':
+ errno = 0;
+ port = strtol(optarg, &endp, 10);
+ if (endp == optarg || *endp || errno) {
+ fprintf(stderr, "Invalid port specified\n");
+ exit(1);
+ }
+ break;
+ case 't':
+ title = strdup(optarg);
+ break;
+ case 'u':
+ unused = true;
+ break;
+ case 'l':
+ listen = strdup(optarg);
+ break;
+ case 'v':
+ viewer = true;
+ break;
+ }
+ }
+ if (optind != argc) {
+ fprintf(stderr, "Invalid options!\n");
+ exit(1);
+ }
+ if (domid <= 0) {
+ fprintf(stderr, "Domain ID must be specified!\n");
+ exit(1);
+ }
+
+ if (port <= 0)
+ port = 5900 + domid;
+ if (snprintf(portstr, sizeof(portstr), "%d", port) == -1) {
+ fprintf(stderr, "Invalid port specified\n");
+ exit(1);
+ }
+
+ fake_argv[2] = portstr;
+
+ if (title != NULL)
+ fake_argv[4] = title;
+
+ if (listen != NULL)
+ fake_argv[6] = listen;
+
+ signal(SIGPIPE, SIG_IGN);
+
+ xenfb = xenfb_new();
+ if (xenfb == NULL) {
+ fprintf(stderr, "Could not create framebuffer (%s)\n",
+ strerror(errno));
+ exit(1);
+ }
+
+ if (!xenfb_attach_dom(xenfb, domid)) {
+ fprintf(stderr, "Could not connect to domain (%s)\n",
+ strerror(errno));
+ exit(1);
+ }
+
+ server = rfbGetScreen(&fake_argc, fake_argv,
+ xenfb->width, xenfb->height,
+ 8, 3, xenfb->depth / 8);
+ if (server == NULL) {
+ fprintf(stderr, "Could not create VNC server\n");
+ exit(1);
+ }
+
+ xenfb->user_data = server;
+ xenfb->update = vnc_update;
+
+ if (unused)
+ server->autoPort = true;
+
+ server->serverFormat.redShift = 16;
+ server->serverFormat.greenShift = 8;
+ server->serverFormat.blueShift = 0;
+ server->kbdAddEvent = on_kbd_event;
+ server->ptrAddEvent = on_ptr_event;
+ server->frameBuffer = (char *)xenfb->pixels;
+ server->screenData = xenfb;
+ server->cursor = NULL;
+ rfbInitServer(server);
+
+ rfbRunEventLoop(server, -1, true);
+
+ fd = xenfb_get_fileno(xenfb);
+
+ xenstore_write_vncport(server->port, domid);
+
+ if (viewer)
+ vnc_start_viewer(server->port);
+
+ for (;;) {
+ FD_ZERO(&readfds);
+ FD_SET(fd, &readfds);
+
+ if (select(fd + 1, &readfds, NULL, NULL, NULL) < 0) {
+ if (errno == EINTR)
+ continue;
+ fprintf(stderr, "Connection to domain broke (%s)\n",
+ strerror(errno));
+ break;
+ }
+
+ if (FD_ISSET(fd, &readfds))
+ xenfb_on_incoming(xenfb);
+ }
+
+ rfbScreenCleanup(server);
+ xenfb_delete(xenfb);
+
+ return 0;
+}
diff -r 9977b8785570 tools/xenfb/xenfb.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/xenfb/xenfb.c Sat Sep 30 09:29:38 2006 +0200
@@ -0,0 +1,404 @@
+#include <malloc.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <xenctrl.h>
+#include <linux/xenfb.h>
+#include <linux/xenkbd.h>
+#include <sys/select.h>
+#include <stdbool.h>
+#include <xen/linux/evtchn.h>
+#include <xen/event_channel.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <xs.h>
+
+#include "xenfb.h"
+
+// FIXME defend against malicous frontend?
+
+struct xenfb_private
+{
+ struct xenfb pub;
+ int domid;
+ evtchn_port_t fbdev_port, kbd_port;
+ int evt_xch;
+ int xc;
+ unsigned char *fb;
+ struct xenfb_page *fb_info;
+ struct xenkbd_info *kbd_info;
+};
+
+struct xenfb *xenfb_new(void)
+{
+ struct xenfb_private *xenfb = malloc(sizeof(*xenfb));
+
+ if (xenfb == NULL)
+ return NULL;
+
+ memset(xenfb, 0, sizeof(*xenfb));
+
+ xenfb->domid = -1;
+
+ xenfb->evt_xch = xc_evtchn_open();
+ if (xenfb->evt_xch == -1) {
+ int serrno = errno;
+ free(xenfb);
+ errno = serrno;
+ return NULL;
+ }
+
+ xenfb->xc = xc_interface_open();
+ if (xenfb->xc == -1) {
+ int serrno = errno;
+ xc_evtchn_close(xenfb->evt_xch);
+ free(xenfb);
+ errno = serrno;
+ return NULL;
+ }
+
+ return &xenfb->pub;
+}
+
+int xenfb_get_fileno(struct xenfb *xenfb_pub)
+{
+ struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
+
+ return xc_evtchn_fd(xenfb->evt_xch);
+}
+
+static void xenfb_detach_dom(struct xenfb_private *xenfb)
+{
+ xenfb->domid = -1;
+ munmap(xenfb->fb, xenfb->fb_info->mem_length);
+ munmap(xenfb->fb_info, XC_PAGE_SIZE);
+ munmap(xenfb->kbd_info, XC_PAGE_SIZE);
+ xc_evtchn_unbind(xenfb->evt_xch, xenfb->fbdev_port);
+ xc_evtchn_unbind(xenfb->evt_xch, xenfb->kbd_port);
+}
+
+void xenfb_delete(struct xenfb *xenfb_pub)
+{
+ struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
+ if (xenfb->domid != -1)
+ xenfb_detach_dom(xenfb);
+ free(xenfb);
+}
+
+static int xenfb_fb_event(struct xenfb_private *xenfb, union xenfb_in_event
*event)
+{
+ uint32_t prod;
+ struct xenfb_page *info = xenfb->fb_info;
+
+ prod = info->in_prod;
+ if (prod - info->in_cons == XENFB_IN_RING_LEN) {
+ errno = EAGAIN;
+ return -1;
+ }
+
+ mb(); /* ensure ring space available */
+ XENFB_IN_RING_REF(info, prod) = *event;
+ wmb(); /* ensure ring contents visible */
+ info->in_prod = prod + 1;
+ return xc_evtchn_notify(xenfb->evt_xch, xenfb->fbdev_port);
+}
+
+static int xenfb_kbd_event(struct xenfb_private *xenfb, union xenkbd_in_event
*event)
+{
+ uint32_t prod;
+ struct xenkbd_info *info = xenfb->kbd_info;
+
+ prod = info->in_prod;
+ if (prod - info->in_cons == XENKBD_IN_RING_LEN) {
+ errno = EAGAIN;
+ return -1;
+ }
+
+ mb(); /* ensure ring space available */
+ XENKBD_IN_RING_REF(info, prod) = *event;
+ wmb(); /* ensure ring contents visible */
+ info->in_prod = prod + 1;
+ return xc_evtchn_notify(xenfb->evt_xch, xenfb->kbd_port);
+}
+
+static char *xenfb_path_in_dom(struct xs_handle *h,
+ unsigned domid, const char *path,
+ char *buffer, size_t size)
+{
+ char *domp = xs_get_domain_path(h, domid);
+ int n;
+
+ if (domp == NULL)
+ return NULL;
+ n = snprintf(buffer, size, "%s/%s", domp, path);
+ free(domp);
+ if (n >= size)
+ return NULL;
+ return buffer;
+}
+
+static int xenfb_xs_scanf1(struct xs_handle *xsh, unsigned domid,
+ const char *path, const char *fmt,
+ void *dest)
+{
+ char buffer[1024];
+ char *p;
+ int ret;
+
+ p = xenfb_path_in_dom(xsh, domid, path, buffer, sizeof(buffer));
+ if (!p) {
+ errno = -ENOENT;
+ return -1;
+ }
+ p = xs_read(xsh, XBT_NULL, p, NULL);
+ if (!p) {
+ errno = -ENOENT;
+ return -1;
+ }
+ ret = sscanf(p, fmt, dest);
+ free(p);
+ if (ret != 1) {
+ errno = -EDOM;
+ return -1;
+ }
+ return 0;
+}
+
+bool xenfb_attach_dom(struct xenfb *xenfb_pub, int domid)
+{
+ struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
+ char buffer[1024];
+ struct xs_handle *xsh;
+ unsigned dummy;
+ int ret;
+ char *p, **vec;
+ union xenfb_in_event event;
+ unsigned long *fbmfns = NULL;
+ int n_fbmfns, n_fbdirs;
+ int serrno;
+ int fbdev_evtchn, kbd_evtchn;
+ unsigned long fbdev_mfn, kbd_mfn;
+
+ if (xenfb->domid != -1) {
+ xenfb_detach_dom(xenfb);
+ if (domid == -1)
+ return true;
+ }
+
+ xsh = xs_daemon_open_readonly();
+ if (!xsh)
+ goto error;
+
+ p = xenfb_path_in_dom(xsh, domid, "vfb", buffer, sizeof(buffer));
+ if (!p)
+ goto error;
+ if (!xs_watch(xsh, p, ""))
+ goto error;
+ p = xenfb_path_in_dom(xsh, domid, "vkbd", buffer, sizeof(buffer));
+ if (!p)
+ goto error;
+ if (!xs_watch(xsh, p, ""))
+ goto error;
+
+ for (;;) {
+ ret = xenfb_xs_scanf1(xsh, domid, "vfb/0/page-ref", "%lu",
+ &fbdev_mfn);
+ if (ret == -1 && errno == -ENOENT)
+ goto wait;
+ if (ret < 0)
+ goto error;
+ ret = xenfb_xs_scanf1(xsh, domid, "vfb/0/event-channel", "%u",
+ &fbdev_evtchn);
+ if (ret == -1 && errno == -ENOENT)
+ goto wait;
+ if (ret < 0)
+ goto error;
+ ret = xenfb_xs_scanf1(xsh, domid, "vkbd/0/page-ref", "%lu",
+ &kbd_mfn);
+ if (ret == -1 && errno == -ENOENT)
+ goto wait;
+ if (ret < 0)
+ goto error;
+ ret = xenfb_xs_scanf1(xsh, domid, "vkbd/0/event-channel", "%u",
+ &kbd_evtchn);
+ if (ret == -1 && errno == -ENOENT)
+ goto wait;
+ if (ret < 0)
+ goto error;
+ break;
+
+ wait:
+ printf("Waiting for guest framebuffer to connect...\n");
+ vec = xs_read_watch(xsh, &dummy);
+ if (!vec)
+ goto error;
+ free(vec);
+ }
+ xs_daemon_close(xsh);
+ xsh = NULL;
+
+ xenfb->fbdev_port = xc_evtchn_bind_interdomain(xenfb->evt_xch, domid,
+ fbdev_evtchn);
+ if (xenfb->fbdev_port == -1)
+ goto error;
+
+ xenfb->kbd_port = xc_evtchn_bind_interdomain(xenfb->evt_xch, domid,
+ kbd_evtchn);
+ if (xenfb->kbd_port == -1)
+ goto error;
+
+ xenfb->fb_info = xc_map_foreign_range(xenfb->xc, domid, XC_PAGE_SIZE,
+ PROT_READ | PROT_WRITE,
+ fbdev_mfn);
+ if (xenfb->fb_info == NULL)
+ goto error;
+
+ xenfb->kbd_info = xc_map_foreign_range(xenfb->xc, domid, XC_PAGE_SIZE,
+ PROT_READ | PROT_WRITE,
+ kbd_mfn);
+ if (xenfb->kbd_info == NULL)
+ goto error;
+
+ n_fbmfns = (xenfb->fb_info->mem_length + (XC_PAGE_SIZE - 1)) /
XC_PAGE_SIZE;
+ n_fbdirs = n_fbmfns * sizeof(unsigned long);
+ n_fbdirs = (n_fbdirs + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
+
+ fbmfns = xc_map_foreign_batch(xenfb->xc, domid, PROT_READ,
xenfb->fb_info->pd, n_fbdirs);
+ if (fbmfns == NULL)
+ goto error;
+
+ xenfb->fb = xc_map_foreign_batch(xenfb->xc, domid, PROT_READ |
PROT_WRITE, fbmfns, n_fbmfns);
+ if (xenfb->fb == NULL)
+ goto error;
+
+ event.type = XENFB_TYPE_SET_EVENTS;
+ event.set_events.flags = XENFB_FLAG_UPDATE;
+ if (xenfb_fb_event(xenfb, &event))
+ goto error;
+
+ munmap(fbmfns, n_fbdirs * XC_PAGE_SIZE);
+
+ xenfb->domid = domid;
+
+ xenfb->pub.pixels = xenfb->fb;
+
+ xenfb->pub.row_stride = xenfb->fb_info->line_length;
+ xenfb->pub.depth = xenfb->fb_info->depth;
+ xenfb->pub.width = xenfb->fb_info->width;
+ xenfb->pub.height = xenfb->fb_info->height;
+
+ return true;
+
+error:
+ serrno = errno;
+ if (xenfb->fb)
+ munmap(xenfb->fb, xenfb->fb_info->mem_length);
+ if (fbmfns)
+ munmap(fbmfns, xenfb->fb_info->mem_length);
+ if (xenfb->kbd_info)
+ munmap(xenfb->kbd_info, XC_PAGE_SIZE);
+ if (xenfb->fb_info)
+ munmap(xenfb->fb_info, XC_PAGE_SIZE);
+ if (xenfb->kbd_port);
+ xc_evtchn_unbind(xenfb->evt_xch, xenfb->kbd_port);
+ if (xenfb->fbdev_port)
+ xc_evtchn_unbind(xenfb->evt_xch, xenfb->fbdev_port);
+ if (xsh)
+ xs_daemon_close(xsh);
+ errno = serrno;
+ return false;
+}
+
+static void xenfb_on_fb_event(struct xenfb_private *xenfb)
+{
+ uint32_t prod, cons;
+ struct xenfb_page *info = xenfb->fb_info;
+
+ prod = info->out_prod;
+ rmb(); /* ensure we see ring contents up to prod */
+ for (cons = info->out_cons; cons != prod; cons++) {
+ union xenfb_out_event *event = &XENFB_OUT_RING_REF(info, cons);
+
+ switch (event->type) {
+ case XENFB_TYPE_UPDATE:
+ if (xenfb->pub.update)
+ xenfb->pub.update(&xenfb->pub,
+ event->update.x, event->update.y,
+ event->update.width,
event->update.height);
+ break;
+ }
+ }
+ mb(); /* ensure we're done with ring contents */
+ info->out_cons = cons;
+ xc_evtchn_notify(xenfb->evt_xch, xenfb->fbdev_port);
+}
+
+static void xenfb_on_kbd_event(struct xenfb_private *xenfb)
+{
+ struct xenkbd_info *info = xenfb->kbd_info;
+
+ /* We don't understand any keyboard events, so just ignore them. */
+ info->out_cons = info->out_prod;
+ xc_evtchn_notify(xenfb->evt_xch, xenfb->kbd_port);
+}
+
+int xenfb_on_incoming(struct xenfb *xenfb_pub)
+{
+ struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
+ evtchn_port_t port;
+
+ port = xc_evtchn_pending(xenfb->evt_xch);
+ if (port == -1)
+ return -1;
+
+ if (port == xenfb->fbdev_port) {
+ xenfb_on_fb_event(xenfb);
+ } else if (port == xenfb->kbd_port) {
+ xenfb_on_kbd_event(xenfb);
+ }
+
+ if (xc_evtchn_unmask(xenfb->evt_xch, port) == -1)
+ return -1;
+
+ return 0;
+}
+
+int xenfb_send_key(struct xenfb *xenfb_pub, bool down, int keycode)
+{
+ struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
+ union xenkbd_in_event event;
+
+ event.type = XENKBD_TYPE_KEY;
+ event.key.pressed = down ? 1 : 0;
+ event.key.keycode = keycode;
+
+ return xenfb_kbd_event(xenfb, &event);
+}
+
+int xenfb_send_motion(struct xenfb *xenfb_pub, int rel_x, int rel_y)
+{
+ struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
+ union xenkbd_in_event event;
+
+ event.type = XENKBD_TYPE_MOTION;
+ event.motion.rel_x = rel_x;
+ event.motion.rel_y = rel_y;
+
+ return xenfb_kbd_event(xenfb, &event);
+}
+
+int xenfb_send_button(struct xenfb *xenfb_pub, bool down, int button)
+{
+ struct xenfb_private *xenfb = (struct xenfb_private *)xenfb_pub;
+ union xenkbd_in_event event;
+
+ event.type = XENKBD_TYPE_BUTTON;
+ event.button.pressed = down ? 1 : 0;
+ event.button.button = button;
+
+ return xenfb_kbd_event(xenfb, &event);
+}
diff -r 9977b8785570 tools/xenfb/xenfb.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/xenfb/xenfb.h Sat Sep 30 09:29:38 2006 +0200
@@ -0,0 +1,33 @@
+#ifndef _XENFB_H_
+#define _XENFB_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+struct xenfb
+{
+ uint8_t *pixels;
+
+ int row_stride;
+ int depth;
+ int width;
+ int height;
+
+ void *user_data;
+
+ void (*update)(struct xenfb *xenfb, int x, int y, int width, int
height);
+};
+
+struct xenfb *xenfb_new(void);
+void xenfb_delete(struct xenfb *xenfb);
+
+bool xenfb_attach_dom(struct xenfb *xenfb, int domid);
+
+int xenfb_get_fileno(struct xenfb *xenfb);
+int xenfb_on_incoming(struct xenfb *xenfb);
+
+int xenfb_send_key(struct xenfb *xenfb, bool down, int keycode);
+int xenfb_send_motion(struct xenfb *xenfb, int rel_x, int rel_y);
+int xenfb_send_button(struct xenfb *xenfb, bool down, int button);
+
+#endif
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