[libvirt] [PATCHv3 02/19] storage: treat 'aio' like 'raw' at parse time
Eric Blake
eblake at redhat.com
Wed Oct 17 22:30:13 UTC 2012
We have historically allowed 'aio' as a synonym for 'raw' for
back-compat to xen, but since a future patch will move to using
an enum value, we have to pick one to be our preferred output
name. This is a slight change in the output XML, but the sexpr
and xm outputs should still be identical, and the input XML can
still use either form.
* src/conf/domain_conf.c (virDomainDiskDefForeachPath): Move aio
back-compat...
(virDomainDiskDefParseXML): ...to parse time.
* src/xenxs/xen_sxpr.c (xenParseSxprDisks, xenFormatSxprDisk): ...and
to output time.
* src/xenxs/xen_xm.c (xenParseXM, xenFormatXMDisk): Likewise.
* tests/sexpr2xmldata/sexpr2xml-*.xml: Update tests.
---
v3: open-code in-place string replacement, to avoid confusion with strlen
src/conf/domain_conf.c | 8 ++++++--
src/xenxs/xen_sxpr.c | 12 ++++++++++--
src/xenxs/xen_xm.c | 11 ++++++++++-
tests/sexpr2xmldata/sexpr2xml-curmem.xml | 2 +-
tests/sexpr2xmldata/sexpr2xml-disk-block-shareable.xml | 2 +-
tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap-raw.xml | 2 +-
tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap2-raw.xml | 2 +-
7 files changed, 30 insertions(+), 9 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 74b843d..23dbdb3 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -3724,6 +3724,12 @@ virDomainDiskDefParseXML(virCapsPtr caps,
xmlStrEqual(cur->name, BAD_CAST "driver")) {
driverName = virXMLPropString(cur, "name");
driverType = virXMLPropString(cur, "type");
+ if (STREQ_NULLABLE(driverType, "aio")) {
+ /* In-place conversion to "raw", for Xen back-compat */
+ driverType[0] = 'r';
+ driverType[1] = 'a';
+ driverType[2] = 'w';
+ }
cachetag = virXMLPropString(cur, "cache");
error_policy = virXMLPropString(cur, "error_policy");
rerror_policy = virXMLPropString(cur, "rerror_policy");
@@ -14774,8 +14780,6 @@ int virDomainDiskDefForeachPath(virDomainDiskDefPtr disk,
if (disk->driverType) {
const char *formatStr = disk->driverType;
- if (STREQ(formatStr, "aio"))
- formatStr = "raw"; /* Xen compat */
if ((format = virStorageFileFormatTypeFromString(formatStr)) <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
diff --git a/src/xenxs/xen_sxpr.c b/src/xenxs/xen_sxpr.c
index 6ac7dff..38a7e13 100644
--- a/src/xenxs/xen_sxpr.c
+++ b/src/xenxs/xen_sxpr.c
@@ -443,6 +443,12 @@ xenParseSxprDisks(virDomainDefPtr def,
src);
goto error;
}
+ if (STREQ(disk->driverType, "aio")) {
+ /* In-place conversion to "raw" */
+ disk->driverType[0] = 'r';
+ disk->driverType[1] = 'a';
+ disk->driverType[2] = 'w';
+ }
src = offset + 1;
/* Its possible to use blktap driver for block devs
@@ -1831,9 +1837,11 @@ xenFormatSxprDisk(virDomainDiskDefPtr def,
if (def->driverName) {
if (STREQ(def->driverName, "tap") ||
STREQ(def->driverName, "tap2")) {
+ const char *type = def->driverType ? def->driverType : "aio";
+ if (STREQ(type, "raw"))
+ type = "aio";
virBufferEscapeSexpr(buf, "(uname '%s:", def->driverName);
- virBufferEscapeSexpr(buf, "%s:",
- def->driverType ? def->driverType : "aio");
+ virBufferEscapeSexpr(buf, "%s:", type);
virBufferEscapeSexpr(buf, "%s')", def->src);
} else {
virBufferEscapeSexpr(buf, "(uname '%s:", def->driverName);
diff --git a/src/xenxs/xen_xm.c b/src/xenxs/xen_xm.c
index 40a99be..c564d35 100644
--- a/src/xenxs/xen_xm.c
+++ b/src/xenxs/xen_xm.c
@@ -566,6 +566,12 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
disk->src);
goto cleanup;
}
+ if (STREQ(disk->driverType, "aio")) {
+ /* In-place conversion to "raw" */
+ disk->driverType[0] = 'r';
+ disk->driverType[1] = 'a';
+ disk->driverType[2] = 'w';
+ }
/* Strip the prefix we found off the source file name */
memmove(disk->src, disk->src+(tmp-disk->src)+1,
@@ -1203,9 +1209,12 @@ static int xenFormatXMDisk(virConfValuePtr list,
if(disk->src) {
if (disk->driverName) {
+ const char *type = disk->driverType ? disk->driverType : "aio";
+ if (STREQ(type, "raw"))
+ type = "aio";
virBufferAsprintf(&buf, "%s:", disk->driverName);
if (STREQ(disk->driverName, "tap"))
- virBufferAsprintf(&buf, "%s:", disk->driverType ? disk->driverType : "aio");
+ virBufferAsprintf(&buf, "%s:", type);
} else {
switch (disk->type) {
case VIR_DOMAIN_DISK_TYPE_FILE:
diff --git a/tests/sexpr2xmldata/sexpr2xml-curmem.xml b/tests/sexpr2xmldata/sexpr2xml-curmem.xml
index ac5ab51..1edc52b 100644
--- a/tests/sexpr2xmldata/sexpr2xml-curmem.xml
+++ b/tests/sexpr2xmldata/sexpr2xml-curmem.xml
@@ -17,7 +17,7 @@
<on_crash>restart</on_crash>
<devices>
<disk type='file' device='disk'>
- <driver name='tap' type='aio'/>
+ <driver name='tap' type='raw'/>
<source file='/xen/rhel5.img'/>
<target dev='xvda' bus='xen'/>
</disk>
diff --git a/tests/sexpr2xmldata/sexpr2xml-disk-block-shareable.xml b/tests/sexpr2xmldata/sexpr2xml-disk-block-shareable.xml
index e4cd3a8..571b349 100644
--- a/tests/sexpr2xmldata/sexpr2xml-disk-block-shareable.xml
+++ b/tests/sexpr2xmldata/sexpr2xml-disk-block-shareable.xml
@@ -14,7 +14,7 @@
<on_crash>restart</on_crash>
<devices>
<disk type='file' device='disk'>
- <driver name='tap' type='aio'/>
+ <driver name='tap' type='raw'/>
<source file='/var/lib/xen/images/rhel5pv.img'/>
<target dev='xvda' bus='xen'/>
<shareable/>
diff --git a/tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap-raw.xml b/tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap-raw.xml
index 98ed5c5..df8e7ec 100644
--- a/tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap-raw.xml
+++ b/tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap-raw.xml
@@ -16,7 +16,7 @@
<on_crash>destroy</on_crash>
<devices>
<disk type='file' device='disk'>
- <driver name='tap' type='aio'/>
+ <driver name='tap' type='raw'/>
<source file='/root/some.img'/>
<target dev='xvda' bus='xen'/>
</disk>
diff --git a/tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap2-raw.xml b/tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap2-raw.xml
index b61182b..ea93195 100644
--- a/tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap2-raw.xml
+++ b/tests/sexpr2xmldata/sexpr2xml-disk-drv-blktap2-raw.xml
@@ -16,7 +16,7 @@
<on_crash>destroy</on_crash>
<devices>
<disk type='file' device='disk'>
- <driver name='tap2' type='aio'/>
+ <driver name='tap2' type='raw'/>
<source file='/root/some.img'/>
<target dev='xvda' bus='xen'/>
</disk>
--
1.7.11.7
More information about the libvir-list
mailing list