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purge error_is_set()

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Merge remote-tracking branch 'remotes/kraxel/tags/pull-chardev-2' into staging

purge error_is_set()

# gpg: Signature made Wed 21 May 2014 11:43:44 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-chardev-2:
  error: error_is_set() is finally unused; remove
  char: Explain qmp_chardev_add()'s unusual error handling
  char: Clean up fragile use of error_is_set()
  char: Use return values instead of error_is_set(errp)
  qemu-socket: Clean up inet_connect_opts()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2014-05-22 18:14:01 +01:00
commit 6054d883d6
4 changed files with 36 additions and 35 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
include/qapi/error.h
View file

@ -67,12 +67,6 @@ void error_set_win32(Error **errp, int win32_err, ErrorClass err_class,
*/
void error_setg_file_open(Error **errp, int os_errno, const char *filename);
/**
* Returns true if an indirect pointer to an error is pointing to a valid
* error object.
*/
bool error_is_set(Error **errp);
/*
* Get the error class of an error object.
*/

32
qemu-char.c
View file

@ -3204,6 +3204,7 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
void (*init)(struct CharDriverState *s),
Error **errp)
{
Error *local_err = NULL;
CharDriver *cd;
CharDriverState *chr;
GSList *i;
@ -3245,13 +3246,14 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
chr = NULL;
backend->kind = cd->kind;
if (cd->parse) {
cd->parse(opts, backend, errp);
if (error_is_set(errp)) {
cd->parse(opts, backend, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto qapi_out;
}
}
ret = qmp_chardev_add(bid ? bid : id, backend, errp);
if (error_is_set(errp)) {
if (!ret) {
goto qapi_out;
}
@ -3263,7 +3265,7 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
backend->kind = CHARDEV_BACKEND_KIND_MUX;
backend->mux->chardev = g_strdup(bid);
ret = qmp_chardev_add(id, backend, errp);
if (error_is_set(errp)) {
if (!ret) {
chr = qemu_chr_find(bid);
qemu_chr_delete(chr);
chr = NULL;
@ -3620,18 +3622,18 @@ static int qmp_chardev_open_file_source(char *src, int flags,
static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
{
int flags, in = -1, out = -1;
int flags, in = -1, out;
flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
out = qmp_chardev_open_file_source(file->out, flags, errp);
if (error_is_set(errp)) {
if (out < 0) {
return NULL;
}
if (file->has_in) {
flags = O_RDONLY;
in = qmp_chardev_open_file_source(file->in, flags, errp);
if (error_is_set(errp)) {
if (in < 0) {
qemu_close(out);
return NULL;
}
@ -3647,7 +3649,7 @@ static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
int fd;
fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
if (error_is_set(errp)) {
if (fd < 0) {
return NULL;
}
qemu_set_nonblock(fd);
@ -3665,7 +3667,7 @@ static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
int fd;
fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
if (error_is_set(errp)) {
if (fd < 0) {
return NULL;
}
return qemu_chr_open_pp_fd(fd);
@ -3692,7 +3694,7 @@ static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
} else {
fd = socket_connect(addr, errp, NULL, NULL);
}
if (error_is_set(errp)) {
if (fd < 0) {
return NULL;
}
return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
@ -3705,7 +3707,7 @@ static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
int fd;
fd = socket_dgram(udp->remote, udp->local, errp);
if (error_is_set(errp)) {
if (fd < 0) {
return NULL;
}
return qemu_chr_open_udp_fd(fd);
@ -3796,7 +3798,13 @@ ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
break;
}
if (chr == NULL && !error_is_set(errp)) {
/*
* Character backend open hasn't been fully converted to the Error
* API. Some opens fail without setting an error. Set a generic
* error then.
* TODO full conversion to Error API
*/
if (chr == NULL && errp && !*errp) {
error_setg(errp, "Failed to create chardev");
}
if (chr) {

5
util/error.c
View file

@ -142,11 +142,6 @@ Error *error_copy(const Error *err)
return err_new;
}
bool error_is_set(Error **errp)
{
return (errp && *errp);
}
ErrorClass error_get_class(const Error *err)
{
return err->err_class;

28
util/qemu-sockets.c
View file

@ -354,6 +354,7 @@ static struct addrinfo *inet_parse_connect_opts(QemuOpts *opts, Error **errp)
int inet_connect_opts(QemuOpts *opts, Error **errp,
NonBlockingConnectHandler *callback, void *opaque)
{
Error *local_err = NULL;
struct addrinfo *res, *e;
int sock = -1;
bool in_progress;
@ -372,24 +373,27 @@ int inet_connect_opts(QemuOpts *opts, Error **errp,
}
for (e = res; e != NULL; e = e->ai_next) {
if (error_is_set(errp)) {
error_free(*errp);
*errp = NULL;
}
error_free(local_err);
local_err = NULL;
if (connect_state != NULL) {
connect_state->current_addr = e;
}
sock = inet_connect_addr(e, &in_progress, connect_state, errp);
if (in_progress) {
return sock;
} else if (sock >= 0) {
/* non blocking socket immediate success, call callback */
if (callback != NULL) {
callback(sock, opaque);
}
sock = inet_connect_addr(e, &in_progress, connect_state, &local_err);
if (sock >= 0) {
break;
}
}
if (sock < 0) {
error_propagate(errp, local_err);
} else if (in_progress) {
/* wait_for_connect() will do the rest */
return sock;
} else {
if (callback) {
callback(sock, opaque);
}
}
g_free(connect_state);
freeaddrinfo(res);
return sock;