From c2ed35e2bc17bcacf333626b21cd6796d4d8d6cf Mon Sep 17 00:00:00 2001

From: "Richard W.M. Jones" <rjones@redhat.com>

Date: Tue, 5 Jun 2018 13:27:43 +0100

Subject: [PATCH] v2v: -o rhv-upload: Log full imageio response on failure.

Thanks: Nir Soffer

(cherry picked from commit 831a75cd11c5a87e40fccdadcb62353f6a4d5a72)

---

 v2v/rhv-upload-plugin.py | 69 ++++++++++++++++++++++++----------------

 1 file changed, 42 insertions(+), 27 deletions(-)

diff --git a/v2v/rhv-upload-plugin.py b/v2v/rhv-upload-plugin.py

index 9ad354b84..7c5084efd 100644

--- a/v2v/rhv-upload-plugin.py

+++ b/v2v/rhv-upload-plugin.py

@@ -227,6 +227,32 @@ def can_flush(h):

 def get_size(h):

     return params['disk_size']

+# Any unexpected HTTP response status from the server will end up

+# calling this function which logs the full error, pauses the

+# transfer, sets the failed state, and raises a RuntimeError

+# exception.

+def request_failed(h, r, msg):

+    # Setting the failed flag in the handle causes the disk to be

+    # cleaned up on close.

+    h['failed'] = True

+    h['transfer_service'].pause()

+

+    status = r.status

+    reason = r.reason

+    try:

+        body = r.read()

+    except EnvironmentError as e:

+        body = "(Unable to read response body: %s)" % e

+

+    # Log the full error if we're verbose.

+    debug("unexpected response from imageio server:")

+    debug(msg)

+    debug("%d: %s" % (status, reason))

+    debug(body)

+

+    # Only a short error is included in the exception.

+    raise RuntimeError("%s: %d %s: %r", msg, status, reason, body[:200])

+

 # For documentation see:

 # https://github.com/oVirt/ovirt-imageio/blob/master/docs/random-io.md

 # For examples of working code to read/write from the server, see:

@@ -247,16 +273,14 @@ def pread(h, count, offset):

     r = http.getresponse()

     # 206 = HTTP Partial Content.

     if r.status != 206:

-        h['transfer_service'].pause()

-        h['failed'] = True

-        raise RuntimeError("could not read sector (%d, %d): %d: %s" %

-                           (offset, count, r.status, r.reason))

+        request_failed(h, r,

+                       "could not read sector offset %d size %d" %

+                       (offset, count))

     return r.read()

 def pwrite(h, buf, offset):

     http = h['http']

     transfer = h['transfer']

-    transfer_service = h['transfer_service']

     count = len(buf)

     h['highestwrite'] = max(h['highestwrite'], offset+count)

@@ -274,15 +298,13 @@ def pwrite(h, buf, offset):

     r = http.getresponse()

     if r.status != 200:

-        transfer_service.pause()

-        h['failed'] = True

-        raise RuntimeError("could not write sector (%d, %d): %d: %s" %

-                           (offset, count, r.status, r.reason))

+        request_failed(h, r,

+                       "could not write sector offset %d size %d" %

+                       (offset, count))

 def zero(h, count, offset, may_trim):

     http = h['http']

     transfer = h['transfer']

-    transfer_service = h['transfer_service']

     # Unlike the trim and flush calls, there is no 'can_zero' method

     # so nbdkit could call this even if the server doesn't support

@@ -304,10 +326,9 @@ def zero(h, count, offset, may_trim):

     r = http.getresponse()

     if r.status != 200:

-        transfer_service.pause()

-        h['failed'] = True

-        raise RuntimeError("could not zero sector (%d, %d): %d: %s" %

-                           (offset, count, r.status, r.reason))

+        request_failed(h, r,

+                       "could not zero sector offset %d size %d" %

+                       (offset, count))

 def emulate_zero(h, count, offset):

     # qemu-img convert starts by trying to zero/trim the whole device.

@@ -332,15 +353,13 @@ def emulate_zero(h, count, offset):

         r = http.getresponse()

         if r.status != 200:

-            transfer_service.pause()

-            h['failed'] = True

-            raise RuntimeError("could not write zeroes (%d, %d): %d: %s" %

-                               (offset, count, r.status, r.reason))

+            request_failed(h, r,

+                           "could not write zeroes offset %d size %d" %

+                           (offset, count))

 def trim(h, count, offset):

     http = h['http']

     transfer = h['transfer']

-    transfer_service = h['transfer_service']

     # Construct the JSON request for trimming.

     buf = json.dumps({'op': "trim",

@@ -355,15 +374,13 @@ def trim(h, count, offset):

     r = http.getresponse()

     if r.status != 200:

-        transfer_service.pause()

-        h['failed'] = True

-        raise RuntimeError("could not trim sector (%d, %d): %d: %s" %

-                           (offset, count, r.status, r.reason))

+        request_failed(h, r,

+                       "could not trim sector offset %d size %d" %

+                       (offset, count))

 def flush(h):

     http = h['http']

     transfer = h['transfer']

-    transfer_service = h['transfer_service']

     # Construct the JSON request for flushing.

     buf = json.dumps({'op': "flush"}).encode()

@@ -375,9 +392,7 @@ def flush(h):

     r = http.getresponse()

     if r.status != 200:

-        transfer_service.pause()

-        h['failed'] = True

-        raise RuntimeError("could not flush: %d: %s" % (r.status, r.reason))

+        request_failed(h, r, "could not flush")

 def delete_disk_on_failure(h):

     disk_service = h['disk_service']

-- 

2.20.1