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migration/channel-block: fix return value for qio_channel_block_{readv,writev}

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in the error case. The documentation in include/io/channel.h states
that -1 or QIO_CHANNEL_ERR_BLOCK should be returned upon error. Simply
passing along the return value from the bdrv-functions has the
potential to confuse the call sides. Non-blocking mode is not
implemented currently, so -1 it is.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Fiona Ebner 2022-10-13 10:41:00 +02:00 committed by Juan Quintela
parent a082fab9d2
commit a216ec85b7
1 changed files with 4 additions and 2 deletions
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6
migration/channel-block.c
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@ -62,7 +62,8 @@ qio_channel_block_readv(QIOChannel *ioc,
qemu_iovec_init_external(&qiov, (struct iovec *)iov, niov);
ret = bdrv_readv_vmstate(bioc->bs, &qiov, bioc->offset);
if (ret < 0) {
return ret;
error_setg_errno(errp, -ret, "bdrv_readv_vmstate failed");
return -1;
}
bioc->offset += qiov.size;
@ -86,7 +87,8 @@ qio_channel_block_writev(QIOChannel *ioc,
qemu_iovec_init_external(&qiov, (struct iovec *)iov, niov);
ret = bdrv_writev_vmstate(bioc->bs, &qiov, bioc->offset);
if (ret < 0) {
return ret;
error_setg_errno(errp, -ret, "bdrv_writev_vmstate failed");
return -1;
}
bioc->offset += qiov.size;