4  * Copyright (c) 2003-2008 Fabrice Bellard
31 #include "system/block-backend.h"
32 #include "qapi/qapi-commands-control.h"
33 #include "chardev-internal.h"
49     if (!d->timestamps) {  in mux_chr_write()
50         ret = qemu_chr_fe_write(&d->chr, buf, len);  in mux_chr_write()
56             if (d->linestart) {  in mux_chr_write()
62                 if (d->timestamps_start == -1) {  in mux_chr_write()
63                     d->timestamps_start = ti;  in mux_chr_write()
65                 ti -= d->timestamps_start;  in mux_chr_write()
66                 secs = ti / 1000;  in mux_chr_write()
72                          (int)(ti % 1000));  in mux_chr_write()
75                 qemu_chr_fe_write_all(&d->chr,  in mux_chr_write()
77                 d->linestart = false;  in mux_chr_write()
79             ret += qemu_chr_fe_write(&d->chr, buf + i, 1);  in mux_chr_write()
81                 d->linestart = true;  in mux_chr_write()
90     "% x    exit emulator\n\r",
91     "% s    save disk data back to file (if -snapshot)\n\r",
99 int term_escape_char = 0x01; /* ctrl-a is used for escape */
103     char ebuf[15] = "Escape-Char";  in mux_print_help()
108         snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');  in mux_print_help()
111                  "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",  in mux_print_help()
131     CharBackend *be = d->backends[mux_nr];  in mux_chr_send_event()
133     if (be && be->chr_event) {  in mux_chr_send_event()
134         be->chr_event(be->opaque, event);  in mux_chr_send_event()
142     if (d->focus != -1) {  in mux_chr_be_event()
143         mux_chr_send_event(d, d->focus, event);  in mux_chr_be_event()
149     if (d->term_got_escape) {  in mux_proc_byte()
150         d->term_got_escape = false;  in mux_proc_byte()
159         case 'x':  in mux_proc_byte()
176             assert(d->mux_bitset != 0);  in mux_proc_byte()
178             bit = find_next_bit(&d->mux_bitset, MAX_MUX, d->focus + 1);  in mux_proc_byte()
180                 bit = find_next_bit(&d->mux_bitset, MAX_MUX, 0);  in mux_proc_byte()
185             d->timestamps = !d->timestamps;  in mux_proc_byte()
186             d->timestamps_start = -1;  in mux_proc_byte()
187             d->linestart = false;  in mux_proc_byte()
191         d->term_got_escape = true;  in mux_proc_byte()
202     int m = d->focus;  in mux_chr_accept_input()
203     CharBackend *be = d->backends[m];  in mux_chr_accept_input()
205     while (be && d->prod[m] != d->cons[m] &&  in mux_chr_accept_input()
206            be->chr_can_read && be->chr_can_read(be->opaque)) {  in mux_chr_accept_input()
207         be->chr_read(be->opaque,  in mux_chr_accept_input()
208                      &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);  in mux_chr_accept_input()
215     int m = d->focus;  in mux_chr_can_read()
216     CharBackend *be = d->backends[m];  in mux_chr_can_read()
218     if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) {  in mux_chr_can_read()
222     if (be && be->chr_can_read) {  in mux_chr_can_read()
223         return be->chr_can_read(be->opaque);  in mux_chr_can_read()
233     int m = d->focus;  in mux_chr_read()
234     CharBackend *be = d->backends[m];  in mux_chr_read()
241             if (d->prod[m] == d->cons[m] &&  in mux_chr_read()
242                 be && be->chr_can_read &&  in mux_chr_read()
243                 be->chr_can_read(be->opaque)) {  in mux_chr_read()
244                 be->chr_read(be->opaque, &buf[i], 1);  in mux_chr_read()
246                 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];  in mux_chr_read()
261     bit = -1;  in mux_chr_send_all_event()
262     while ((bit = find_next_bit(&d->mux_bitset, MAX_MUX, bit + 1)) < MAX_MUX) {  in mux_chr_send_all_event()
275     Chardev *chr = qemu_chr_fe_get_driver(&d->chr);  in mux_chr_add_watch()
278     if (!cc->chr_add_watch) {  in mux_chr_add_watch()
282     return cc->chr_add_watch(chr, cond);  in mux_chr_add_watch()
290     bit = -1;  in char_mux_finalize()
291     while ((bit = find_next_bit(&d->mux_bitset, MAX_MUX, bit + 1)) < MAX_MUX) {  in char_mux_finalize()
292         CharBackend *be = d->backends[bit];  in char_mux_finalize()
293         be->chr = NULL;  in char_mux_finalize()
294         d->backends[bit] = NULL;  in char_mux_finalize()
296     d->mux_bitset = 0;  in char_mux_finalize()
297     qemu_chr_fe_deinit(&d->chr, false);  in char_mux_finalize()
305     qemu_chr_fe_set_handlers_full(&d->chr,  in mux_chr_update_read_handlers()
311                                   chr->gcontext, true, false);  in mux_chr_update_read_handlers()
319     QEMU_BUILD_BUG_ON(MAX_MUX > (sizeof(d->mux_bitset) * BITS_PER_BYTE));  in mux_chr_attach_frontend()
321     bit = find_next_zero_bit(&d->mux_bitset, MAX_MUX, 0);  in mux_chr_attach_frontend()
326                    d->parent.label);  in mux_chr_attach_frontend()
330     d->mux_bitset |= (1ul << bit);  in mux_chr_attach_frontend()
331     d->backends[bit] = b;  in mux_chr_attach_frontend()
339     if (!(d->mux_bitset & (1ul << tag))) {  in mux_chr_detach_frontend()
343     d->mux_bitset &= ~(1ul << tag);  in mux_chr_detach_frontend()
344     d->backends[tag] = NULL;  in mux_chr_detach_frontend()
353     assert(d->mux_bitset & (1ul << focus));  in mux_set_focus()
355     if (d->focus != -1) {  in mux_set_focus()
356         mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);  in mux_set_focus()
359     d->focus = focus;  in mux_set_focus()
360     chr->be = d->backends[focus];  in mux_set_focus()
361     mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);  in mux_set_focus()
369     ChardevMux *mux = backend->u.mux.data;  in qemu_chr_open_mux()
373     drv = qemu_chr_find(mux->chardev);  in qemu_chr_open_mux()
375         error_setg(errp, "mux: base chardev %s not found", mux->chardev);  in qemu_chr_open_mux()
379     d->focus = -1;  in qemu_chr_open_mux()
384     qemu_chr_fe_init(&d->chr, drv, errp);  in qemu_chr_open_mux()
397     backend->type = CHARDEV_BACKEND_KIND_MUX;  in qemu_chr_parse_mux()
398     mux = backend->u.mux.data = g_new0(ChardevMux, 1);  in qemu_chr_parse_mux()
400     mux->chardev = g_strdup(chardev);  in qemu_chr_parse_mux()
404  * Called after processing of default and command-line-specified
408  * focus when initial command-line processing/machine init is
417     /* send OPENED to all already-attached FEs */  in open_muxes()
424     chr->be_open = 1;  in open_muxes()
436     if (!chr->be_open && CHARDEV_IS_MUX(chr)) {  in chardev_options_parsed_cb()
454     cc->parse = qemu_chr_parse_mux;  in char_mux_class_init()
455     cc->open = qemu_chr_open_mux;  in char_mux_class_init()
456     cc->chr_write = mux_chr_write;  in char_mux_class_init()
457     cc->chr_accept_input = mux_chr_accept_input;  in char_mux_class_init()
458     cc->chr_add_watch = mux_chr_add_watch;  in char_mux_class_init()
459     cc->chr_be_event = mux_chr_be_event;  in char_mux_class_init()
460     cc->chr_update_read_handler = mux_chr_update_read_handlers;  in char_mux_class_init()