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vhost-user: add error report in vhost_user_write()

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Similar to vhost_user_read() error report, it is useful to have early
error report.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-07-27 01:15:24 +04:00 committed by Michael S. Tsirkin
parent 69179fe2fc
commit f6b8571041
1 changed files with 10 additions and 3 deletions
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13
hw/virtio/vhost-user.c
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@ -176,7 +176,7 @@ static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg,
int *fds, int fd_num) int *fds, int fd_num)
{ {
CharDriverState *chr = dev->opaque; CharDriverState *chr = dev->opaque;
int size = VHOST_USER_HDR_SIZE + msg->size; int ret, size = VHOST_USER_HDR_SIZE + msg->size;
/* /*
* For non-vring specific requests, like VHOST_USER_SET_MEM_TABLE, * For non-vring specific requests, like VHOST_USER_SET_MEM_TABLE,
@ -188,11 +188,18 @@ static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg,
} }
if (qemu_chr_fe_set_msgfds(chr, fds, fd_num) < 0) { if (qemu_chr_fe_set_msgfds(chr, fds, fd_num) < 0) {
error_report("Failed to set msg fds.");
return -1; return -1;
} }
return qemu_chr_fe_write_all(chr, (const uint8_t *) msg, size) == size ? ret = qemu_chr_fe_write_all(chr, (const uint8_t *) msg, size);
0 : -1; if (ret != size) {
error_report("Failed to write msg."
" Wrote %d instead of %d.", ret, size);
return -1;
}
return 0;
} }
static int vhost_user_set_log_base(struct vhost_dev *dev, uint64_t base, static int vhost_user_set_log_base(struct vhost_dev *dev, uint64_t base,