diff options
author | Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
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committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/qga/channel-posix.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/qga/channel-posix.c')
-rw-r--r-- | qemu/qga/channel-posix.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/qemu/qga/channel-posix.c b/qemu/qga/channel-posix.c new file mode 100644 index 000000000..8aad4fee9 --- /dev/null +++ b/qemu/qga/channel-posix.c @@ -0,0 +1,275 @@ +#include <glib.h> +#include <termios.h> +#include <errno.h> +#include <unistd.h> +#include <fcntl.h> +#include <stdlib.h> +#include <string.h> +#include "qemu/osdep.h" +#include "qemu/sockets.h" +#include "qga/channel.h" + +#ifdef CONFIG_SOLARIS +#include <stropts.h> +#endif + +#define GA_CHANNEL_BAUDRATE_DEFAULT B38400 /* for isa-serial channels */ + +struct GAChannel { + GIOChannel *listen_channel; + GIOChannel *client_channel; + GAChannelMethod method; + GAChannelCallback event_cb; + gpointer user_data; +}; + +static int ga_channel_client_add(GAChannel *c, int fd); + +static gboolean ga_channel_listen_accept(GIOChannel *channel, + GIOCondition condition, gpointer data) +{ + GAChannel *c = data; + int ret, client_fd; + bool accepted = false; + struct sockaddr_un addr; + socklen_t addrlen = sizeof(addr); + + g_assert(channel != NULL); + + client_fd = qemu_accept(g_io_channel_unix_get_fd(channel), + (struct sockaddr *)&addr, &addrlen); + if (client_fd == -1) { + g_warning("error converting fd to gsocket: %s", strerror(errno)); + goto out; + } + qemu_set_nonblock(client_fd); + ret = ga_channel_client_add(c, client_fd); + if (ret) { + g_warning("error setting up connection"); + close(client_fd); + goto out; + } + accepted = true; + +out: + /* only accept 1 connection at a time */ + return !accepted; +} + +/* start polling for readable events on listen fd, new==true + * indicates we should use the existing s->listen_channel + */ +static void ga_channel_listen_add(GAChannel *c, int listen_fd, bool create) +{ + if (create) { + c->listen_channel = g_io_channel_unix_new(listen_fd); + } + g_io_add_watch(c->listen_channel, G_IO_IN, ga_channel_listen_accept, c); +} + +static void ga_channel_listen_close(GAChannel *c) +{ + g_assert(c->method == GA_CHANNEL_UNIX_LISTEN); + g_assert(c->listen_channel); + g_io_channel_shutdown(c->listen_channel, true, NULL); + g_io_channel_unref(c->listen_channel); + c->listen_channel = NULL; +} + +/* cleanup state for closed connection/session, start accepting new + * connections if we're in listening mode + */ +static void ga_channel_client_close(GAChannel *c) +{ + g_assert(c->client_channel); + g_io_channel_shutdown(c->client_channel, true, NULL); + g_io_channel_unref(c->client_channel); + c->client_channel = NULL; + if (c->method == GA_CHANNEL_UNIX_LISTEN && c->listen_channel) { + ga_channel_listen_add(c, 0, false); + } +} + +static gboolean ga_channel_client_event(GIOChannel *channel, + GIOCondition condition, gpointer data) +{ + GAChannel *c = data; + gboolean client_cont; + + g_assert(c); + if (c->event_cb) { + client_cont = c->event_cb(condition, c->user_data); + if (!client_cont) { + ga_channel_client_close(c); + return false; + } + } + return true; +} + +static int ga_channel_client_add(GAChannel *c, int fd) +{ + GIOChannel *client_channel; + GError *err = NULL; + + g_assert(c && !c->client_channel); + client_channel = g_io_channel_unix_new(fd); + g_assert(client_channel); + g_io_channel_set_encoding(client_channel, NULL, &err); + if (err != NULL) { + g_warning("error setting channel encoding to binary"); + g_error_free(err); + return -1; + } + g_io_add_watch(client_channel, G_IO_IN | G_IO_HUP, + ga_channel_client_event, c); + c->client_channel = client_channel; + return 0; +} + +static gboolean ga_channel_open(GAChannel *c, const gchar *path, GAChannelMethod method) +{ + int ret; + c->method = method; + + switch (c->method) { + case GA_CHANNEL_VIRTIO_SERIAL: { + int fd = qemu_open(path, O_RDWR | O_NONBLOCK +#ifndef CONFIG_SOLARIS + | O_ASYNC +#endif + ); + if (fd == -1) { + g_critical("error opening channel: %s", strerror(errno)); + return false; + } +#ifdef CONFIG_SOLARIS + ret = ioctl(fd, I_SETSIG, S_OUTPUT | S_INPUT | S_HIPRI); + if (ret == -1) { + g_critical("error setting event mask for channel: %s", + strerror(errno)); + close(fd); + return false; + } +#endif + ret = ga_channel_client_add(c, fd); + if (ret) { + g_critical("error adding channel to main loop"); + close(fd); + return false; + } + break; + } + case GA_CHANNEL_ISA_SERIAL: { + struct termios tio; + int fd = qemu_open(path, O_RDWR | O_NOCTTY | O_NONBLOCK); + if (fd == -1) { + g_critical("error opening channel: %s", strerror(errno)); + return false; + } + tcgetattr(fd, &tio); + /* set up serial port for non-canonical, dumb byte streaming */ + tio.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP | + INLCR | IGNCR | ICRNL | IXON | IXOFF | IXANY | + IMAXBEL); + tio.c_oflag = 0; + tio.c_lflag = 0; + tio.c_cflag |= GA_CHANNEL_BAUDRATE_DEFAULT; + /* 1 available byte min or reads will block (we'll set non-blocking + * elsewhere, else we have to deal with read()=0 instead) + */ + tio.c_cc[VMIN] = 1; + tio.c_cc[VTIME] = 0; + /* flush everything waiting for read/xmit, it's garbage at this point */ + tcflush(fd, TCIFLUSH); + tcsetattr(fd, TCSANOW, &tio); + ret = ga_channel_client_add(c, fd); + if (ret) { + g_critical("error adding channel to main loop"); + close(fd); + return false; + } + break; + } + case GA_CHANNEL_UNIX_LISTEN: { + Error *local_err = NULL; + int fd = unix_listen(path, NULL, strlen(path), &local_err); + if (local_err != NULL) { + g_critical("%s", error_get_pretty(local_err)); + error_free(local_err); + return false; + } + ga_channel_listen_add(c, fd, true); + break; + } + default: + g_critical("error binding/listening to specified socket"); + return false; + } + + return true; +} + +GIOStatus ga_channel_write_all(GAChannel *c, const gchar *buf, gsize size) +{ + GError *err = NULL; + gsize written = 0; + GIOStatus status = G_IO_STATUS_NORMAL; + + while (size) { + status = g_io_channel_write_chars(c->client_channel, buf, size, + &written, &err); + g_debug("sending data, count: %d", (int)size); + if (err != NULL) { + g_warning("error writing to channel: %s", err->message); + return G_IO_STATUS_ERROR; + } + if (status != G_IO_STATUS_NORMAL) { + break; + } + size -= written; + } + + if (status == G_IO_STATUS_NORMAL) { + status = g_io_channel_flush(c->client_channel, &err); + if (err != NULL) { + g_warning("error flushing channel: %s", err->message); + return G_IO_STATUS_ERROR; + } + } + + return status; +} + +GIOStatus ga_channel_read(GAChannel *c, gchar *buf, gsize size, gsize *count) +{ + return g_io_channel_read_chars(c->client_channel, buf, size, count, NULL); +} + +GAChannel *ga_channel_new(GAChannelMethod method, const gchar *path, + GAChannelCallback cb, gpointer opaque) +{ + GAChannel *c = g_malloc0(sizeof(GAChannel)); + c->event_cb = cb; + c->user_data = opaque; + + if (!ga_channel_open(c, path, method)) { + g_critical("error opening channel"); + ga_channel_free(c); + return NULL; + } + + return c; +} + +void ga_channel_free(GAChannel *c) +{ + if (c->method == GA_CHANNEL_UNIX_LISTEN + && c->listen_channel) { + ga_channel_listen_close(c); + } + if (c->client_channel) { + ga_channel_client_close(c); + } + g_free(c); +} |