qemu-char: convert parallel backend to data-driven creation
Conversion to Error * brings better error messages; before: qemu-system-x86_64: -chardev id=serial,backend=parallel,path=vl.c: Failed to create chardev After: qemu-system-x86_64: -chardev id=serial,backend=parallel,path=vl.c: not a parallel port: Inappropriate ioctl for device Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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6511d39679
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38bfb1a63d
31
qemu-char.c
31
qemu-char.c
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@ -1753,12 +1753,13 @@ static void pp_close(CharDriverState *chr)
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qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
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qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
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}
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}
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static CharDriverState *qemu_chr_open_pp_fd(int fd)
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static CharDriverState *qemu_chr_open_pp_fd(int fd, Error **errp)
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{
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{
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CharDriverState *chr;
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CharDriverState *chr;
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ParallelCharDriver *drv;
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ParallelCharDriver *drv;
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if (ioctl(fd, PPCLAIM) < 0) {
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if (ioctl(fd, PPCLAIM) < 0) {
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error_setg_errno(errp, errno, "not a parallel port");
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close(fd);
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close(fd);
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return NULL;
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return NULL;
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}
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}
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@ -1818,7 +1819,7 @@ static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
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return 0;
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return 0;
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}
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}
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static CharDriverState *qemu_chr_open_pp_fd(int fd)
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static CharDriverState *qemu_chr_open_pp_fd(int fd, Error **errp)
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{
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{
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CharDriverState *chr;
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CharDriverState *chr;
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@ -3481,6 +3482,7 @@ static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
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}
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}
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#endif
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#endif
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#ifdef HAVE_CHARDEV_PARPORT
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static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
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static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
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Error **errp)
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Error **errp)
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{
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{
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@ -3493,6 +3495,7 @@ static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
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backend->parallel = g_new0(ChardevHostdev, 1);
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backend->parallel = g_new0(ChardevHostdev, 1);
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backend->parallel->device = g_strdup(device);
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backend->parallel->device = g_strdup(device);
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}
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}
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#endif
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static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
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static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
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Error **errp)
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Error **errp)
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@ -4044,13 +4047,6 @@ static CharDriverState *qmp_chardev_open_serial(const char *id,
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return qemu_chr_open_win_path(serial->device, errp);
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return qemu_chr_open_win_path(serial->device, errp);
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}
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}
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static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
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Error **errp)
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{
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error_setg(errp, "character device backend type 'parallel' not supported");
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return NULL;
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}
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#else /* WIN32 */
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#else /* WIN32 */
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static int qmp_chardev_open_file_source(char *src, int flags,
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static int qmp_chardev_open_file_source(char *src, int flags,
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@ -4110,16 +4106,19 @@ static CharDriverState *qmp_chardev_open_serial(const char *id,
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#endif
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#endif
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#ifdef HAVE_CHARDEV_PARPORT
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#ifdef HAVE_CHARDEV_PARPORT
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static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
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static CharDriverState *qmp_chardev_open_parallel(const char *id,
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ChardevBackend *backend,
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ChardevReturn *ret,
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Error **errp)
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Error **errp)
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{
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{
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ChardevHostdev *parallel = backend->parallel;
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int fd;
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int fd;
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fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
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fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
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if (fd < 0) {
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if (fd < 0) {
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return NULL;
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return NULL;
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}
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}
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return qemu_chr_open_pp_fd(fd);
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return qemu_chr_open_pp_fd(fd, errp);
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}
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}
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#endif
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#endif
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@ -4265,11 +4264,9 @@ ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
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case CHARDEV_BACKEND_KIND_SERIAL:
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case CHARDEV_BACKEND_KIND_SERIAL:
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abort();
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abort();
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break;
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break;
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#ifdef HAVE_CHARDEV_PARPORT
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case CHARDEV_BACKEND_KIND_PARALLEL:
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case CHARDEV_BACKEND_KIND_PARALLEL:
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chr = qmp_chardev_open_parallel(backend->parallel, &local_err);
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abort();
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break;
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break;
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#endif
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case CHARDEV_BACKEND_KIND_PIPE:
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case CHARDEV_BACKEND_KIND_PIPE:
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chr = qemu_chr_open_pipe(backend->pipe);
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chr = qemu_chr_open_pipe(backend->pipe);
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break;
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break;
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@ -4405,10 +4402,12 @@ static void register_types(void)
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register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL,
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register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL,
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qemu_chr_parse_serial, qmp_chardev_open_serial);
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qemu_chr_parse_serial, qmp_chardev_open_serial);
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#endif
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#endif
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#ifdef HAVE_CHARDEV_PARPORT
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register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
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register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
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qemu_chr_parse_parallel, NULL);
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qemu_chr_parse_parallel, qmp_chardev_open_parallel);
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register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL,
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register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL,
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qemu_chr_parse_parallel, NULL);
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qemu_chr_parse_parallel, qmp_chardev_open_parallel);
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#endif
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register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL,
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register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL,
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NULL);
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NULL);
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register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL,
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register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL,
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