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From 9356d615ccbbb556a11d70a01941964b1af7d503 Mon Sep 17 00:00:00 2001
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Message-Id: <9356d615ccbbb556a11d70a01941964b1af7d503@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Wed, 31 Jan 2018 12:51:00 +0100
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Subject: [PATCH] util: storage: Parse 'lun' for iSCSI protocol from JSON as
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 string or number
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While the QEMU QAPI schema describes 'lun' as a number, the code dealing
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with JSON strings does not strictly adhere to this schema and thus
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formats the number back as a string. Use the new helper to retrieve both
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possibilities.
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Note that the formatting code is okay and qemu will accept it as an int.
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Tweak also one of the test strings to verify that both formats work
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with libvirt.
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1540290
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(cherry picked from commit f46d6e22f2dc352cd43480c1d148222f4e62b8e6)
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---
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 src/util/virstoragefile.c | 13 +++++--------
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 tests/virstoragetest.c    |  2 +-
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 2 files changed, 6 insertions(+), 9 deletions(-)
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diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
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index d1e356a121..69deaea7c5 100644
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--- a/src/util/virstoragefile.c
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+++ b/src/util/virstoragefile.c
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@@ -2966,10 +2966,9 @@ virStorageSourceParseBackingJSONiSCSI(virStorageSourcePtr src,
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     const char *transport = virJSONValueObjectGetString(json, "transport");
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     const char *portal = virJSONValueObjectGetString(json, "portal");
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     const char *target = virJSONValueObjectGetString(json, "target");
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+    const char *lun = virJSONValueObjectGetStringOrNumber(json, "lun");
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     const char *uri;
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     char *port;
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-    unsigned int lun = 0;
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-    char *fulltarget = NULL;
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     int ret = -1;
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     /* legacy URI based syntax passed via 'filename' option */
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@@ -2980,6 +2979,9 @@ virStorageSourceParseBackingJSONiSCSI(virStorageSourcePtr src,
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     src->type = VIR_STORAGE_TYPE_NETWORK;
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     src->protocol = VIR_STORAGE_NET_PROTOCOL_ISCSI;
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+    if (!lun)
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+        lun = "0";
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+
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     if (VIR_ALLOC(src->hosts) < 0)
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         goto cleanup;
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@@ -3015,17 +3017,12 @@ virStorageSourceParseBackingJSONiSCSI(virStorageSourcePtr src,
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         *port = '\0';
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     }
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-    ignore_value(virJSONValueObjectGetNumberUint(json, "lun", &lun));
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-
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-    if (virAsprintf(&fulltarget, "%s/%u", target, lun) < 0)
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+    if (virAsprintf(&src->path, "%s/%s", target, lun) < 0)
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         goto cleanup;
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-    VIR_STEAL_PTR(src->path, fulltarget);
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-
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     ret = 0;
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  cleanup:
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-    VIR_FREE(fulltarget);
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     return ret;
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 }
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diff --git a/tests/virstoragetest.c b/tests/virstoragetest.c
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index bdd0829c21..b7f2eeb96d 100644
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--- a/tests/virstoragetest.c
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+++ b/tests/virstoragetest.c
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@@ -1572,7 +1572,7 @@ mymain(void)
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                                        "\"transport\":\"tcp\","
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                                        "\"portal\":\"test.org:1234\","
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                                        "\"target\":\"iqn.2016-12.com.virttest:emulated-iscsi-noauth.target\","
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-                                       "\"lun\":6"
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+                                       "\"lun\":\"6\""
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                                       "}"
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                             "}",
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                        "<source protocol='iscsi' name='iqn.2016-12.com.virttest:emulated-iscsi-noauth.target/6'>\n"
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-- 
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2.16.1
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