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socket shutdown

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Add QEMUFile interface to allow a socket to be 'shut down' - i.e. any
reads/writes will fail (and any blocking read/write will be woken).

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2015-01-08 11:11:30 +00:00 • committed by Amit Shah
parent 8580b06498
commit e1a8c9b67f
4 changed files with 48 additions and 4 deletions
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23
migration/qemu-file-unix.c
View file

@ -26,6 +26,7 @@
#include "qemu/sockets.h"
#include "block/coroutine.h"
#include "migration/qemu-file.h"
#include "migration/qemu-file-internal.h"
typedef struct QEMUFileSocket {
int fd;
@ -84,6 +85,17 @@ static int socket_close(void *opaque)
return 0;
}
static int socket_shutdown(void *opaque, bool rd, bool wr)
{
QEMUFileSocket *s = opaque;
if (shutdown(s->fd, rd ? (wr ? SHUT_RDWR : SHUT_RD) : SHUT_WR)) {
return -errno;
} else {
return 0;
}
}
static ssize_t unix_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
int64_t pos)
{
@ -192,15 +204,18 @@ QEMUFile *qemu_fdopen(int fd, const char *mode)
}
static const QEMUFileOps socket_read_ops = {
.get_fd = socket_get_fd,
.get_fd = socket_get_fd,
.get_buffer = socket_get_buffer,
.close = socket_close
.close = socket_close,
.shut_down = socket_shutdown
};
static const QEMUFileOps socket_write_ops = {
.get_fd = socket_get_fd,
.get_fd = socket_get_fd,
.writev_buffer = socket_writev_buffer,
.close = socket_close
.close = socket_close,
.shut_down = socket_shutdown
};
QEMUFile *qemu_fopen_socket(int fd, const char *mode)