[PATCH 5/9] virsh: Track if vol-upload or vol-download work over a block device
We can't use virFileInData() with block devices, but we could use
new virFileInDataDetectZeroes(). But to decide we need to know if
the FD we are reading data from / writing data to is a block
device. Store this information in _virshStreamCallbackData.
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
---
tools/virsh-util.h | 1 +
tools/virsh-volume.c | 14 ++++++++++++++
2 files changed, 15 insertions(+)
diff --git a/tools/virsh-util.h b/tools/virsh-util.h
index 72653d9735..9ef28cfe0a 100644
--- a/tools/virsh-util.h
+++ b/tools/virsh-util.h
@@ -72,6 +72,7 @@ typedef virshStreamCallbackData *virshStreamCallbackDataPtr;
struct _virshStreamCallbackData {
vshControl *ctl;
int fd;
+ bool isBlock;
};
int
diff --git a/tools/virsh-volume.c b/tools/virsh-volume.c
index 5cbc2efb7a..20823e2d10 100644
--- a/tools/virsh-volume.c
+++ b/tools/virsh-volume.c
@@ -679,6 +679,7 @@ cmdVolUpload(vshControl *ctl, const vshCmd *cmd)
virshControlPtr priv = ctl->privData;
unsigned int flags = 0;
virshStreamCallbackData cbData;
+ struct stat sb;
if (vshCommandOptULongLong(ctl, cmd, "offset", &offset) < 0)
return false;
@@ -697,8 +698,14 @@ cmdVolUpload(vshControl *ctl, const vshCmd *cmd)
goto cleanup;
}
+ if (fstat(fd, &sb) < 0) {
+ vshError(ctl, _("unable to stat %s"), file);
+ goto cleanup;
+ }
+
cbData.ctl = ctl;
cbData.fd = fd;
+ cbData.isBlock = !!S_ISBLK(sb.st_mode);
if (vshCommandOptBool(cmd, "sparse"))
flags |= VIR_STORAGE_VOL_UPLOAD_SPARSE_STREAM;
@@ -795,6 +802,7 @@ cmdVolDownload(vshControl *ctl, const vshCmd *cmd)
virshControlPtr priv = ctl->privData;
virshStreamCallbackData cbData;
unsigned int flags = 0;
+ struct stat sb;
if (vshCommandOptULongLong(ctl, cmd, "offset", &offset) < 0)
return false;
@@ -821,8 +829,14 @@ cmdVolDownload(vshControl *ctl, const vshCmd *cmd)
created = true;
}
+ if (fstat(fd, &sb) < 0) {
+ vshError(ctl, _("unable to stat %s"), file);
+ goto cleanup;
+ }
+
cbData.ctl = ctl;
cbData.fd = fd;
+ cbData.isBlock = !!S_ISBLK(sb.st_mode);
if (!(st = virStreamNew(priv->conn, 0))) {
vshError(ctl, _("cannot create a new stream"));
--
2.26.2