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author | Kirill Batuzov <batuzovk@ispras.ru> | 2014-07-01 15:52:32 +0400 |
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committer | Michael S. Tsirkin <mst@redhat.com> | 2014-07-06 09:13:54 +0300 |
commit | 812c1057f6175ac9a9829fa2920a2b5783814193 (patch) | |
tree | b12d8756b1ce00662d4b910c5b02c1a539ff6f02 /qemu-char.c | |
parent | 85d1277e668106294d134a101729c6f36289da1a (diff) | |
download | qemu-812c1057f6175ac9a9829fa2920a2b5783814193.zip qemu-812c1057f6175ac9a9829fa2920a2b5783814193.tar.gz qemu-812c1057f6175ac9a9829fa2920a2b5783814193.tar.bz2 |
Handle G_IO_HUP in tcp_chr_read for tcp chardev
Since commit cdaa86a54b232572bba594bf87a7416e527e460c
("Add G_IO_HUP handler for socket chardev")
GLib limitation results in a bug on Windows host. Steps to reproduce:
Start qemu: qemu-system-i386 -qmp tcp:127.0.0.1:4444:server:nowait
Connect with telnet: telnet 127.0.0.1 4444
Try sending some data from telnet.
Expected result: answers from QEMU.
Observed result: no answers (actually tcp_chr_read is not called at all).
Due to GLib limitations it is not possible to create several watches on one
channel on Windows hosts. See bug #338943 in GNOME bugzilla for details:
https://bugzilla.gnome.org/show_bug.cgi?id=338943
This reimplements commit cdaa86a54b232572bba594bf87a7416e527e460c
("Add G_IO_HUP handler for socket chardev") using a single watch:
Handle G_IO_HUP in tcp_chr_read instead. It is already watched by a
corresponding watch. Remove the second watch with its handler.
Cc: Antonios Motakis <a.motakis@virtualopensystems.com>
Cc: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru>
Signed-off-by: Nikita Belov <zodiac@ispras.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'qemu-char.c')
-rw-r--r-- | qemu-char.c | 27 |
1 files changed, 6 insertions, 21 deletions
diff --git a/qemu-char.c b/qemu-char.c index 51917de..22a9777 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -2673,6 +2673,12 @@ static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque) uint8_t buf[READ_BUF_LEN]; int len, size; + if (cond & G_IO_HUP) { + /* connection closed */ + tcp_chr_disconnect(chr); + return TRUE; + } + if (!s->connected || s->max_size <= 0) { return TRUE; } @@ -2724,25 +2730,6 @@ CharDriverState *qemu_chr_open_eventfd(int eventfd) } #endif -static gboolean tcp_chr_chan_close(GIOChannel *channel, GIOCondition cond, - void *opaque) -{ - CharDriverState *chr = opaque; - - if (cond != G_IO_HUP) { - return FALSE; - } - - /* connection closed */ - tcp_chr_disconnect(chr); - if (chr->fd_hup_tag) { - g_source_remove(chr->fd_hup_tag); - chr->fd_hup_tag = 0; - } - - return TRUE; -} - static void tcp_chr_connect(void *opaque) { CharDriverState *chr = opaque; @@ -2752,8 +2739,6 @@ static void tcp_chr_connect(void *opaque) if (s->chan) { chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr); - chr->fd_hup_tag = g_io_add_watch(s->chan, G_IO_HUP, tcp_chr_chan_close, - chr); } qemu_chr_be_generic_open(chr); } |