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qemu: support disk filenames with comma

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If there is a disk file with a comma in the name, QEmu expects a double
comma instead of a single one (e.g., the file "virtual,disk.img" needs
to be specified as "virtual,,disk.img" in QEmu's command line). This
patch fixes libvirt to work with that feature. Fix RHBZ #801036.

Based on an initial patch by Crístian Viana.

* src/util/buf.h (virBufferEscape): Alter signature.
* src/util/buf.c (virBufferEscape): Add parameter.
(virBufferEscapeSexpr): Fix caller.
* src/qemu/qemu_command.c (qemuBuildRBDString): Likewise.  Also
escape commas in file names.
(qemuBuildDriveStr): Escape commas in file names.
* docs/schemas/basictypes.rng (absFilePath): Relax RNG to allow
commas in input file names.
* tests/qemuxml2argvdata/*-disk-drive-network-sheepdog.*: Update
test.

Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake 2012-03-09 16:13:30 -03:00
parent dd39f13af0
commit 6e0ff1d402
6 changed files with 49 additions and 27 deletions
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2
docs/schemas/basictypes.rng
View File

@ -128,7 +128,7 @@
<define name="absFilePath">
<data type="string">
<param name="pattern">/[a-zA-Z0-9_\.\+\-\\&amp;&quot;&apos;&lt;&gt;/%]+</param>
<param name="pattern">/[a-zA-Z0-9_\.\+\-\\&amp;&quot;&apos;&lt;&gt;/%,]+</param>
</data>
</define>

49
src/qemu/qemu_command.c
View File

@ -1629,6 +1629,7 @@ qemuSafeSerialParamValue(const char *value)
return 0;
}
static int
qemuBuildRBDString(virConnectPtr conn,
virDomainDiskDefPtr disk,
@ -1639,9 +1640,9 @@ qemuBuildRBDString(virConnectPtr conn,
char *secret = NULL;
size_t secret_size;
virBufferAsprintf(opt, "rbd:%s", disk->src);
virBufferEscape(opt, ',', ",", "rbd:%s", disk->src);
if (disk->auth.username) {
virBufferEscape(opt, ":", ":id=%s", disk->auth.username);
virBufferEscape(opt, '\\', ":", ":id=%s", disk->auth.username);
/* look up secret */
switch (disk->auth.secretType) {
case VIR_DOMAIN_DISK_SECRET_TYPE_UUID:
@ -1672,7 +1673,8 @@ qemuBuildRBDString(virConnectPtr conn,
virReportOOMError();
goto error;
}
virBufferEscape(opt, ":", ":key=%s:auth_supported=cephx none",
virBufferEscape(opt, '\\', ":",
":key=%s:auth_supported=cephx none",
base64);
VIR_FREE(base64);
} else {
@ -1923,9 +1925,10 @@ qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,
goto error;
}
if (disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY)
virBufferAsprintf(&opt, "file=fat:floppy:%s,", disk->src);
virBufferEscape(&opt, ',', ",", "file=fat:floppy:%s,",
disk->src);
else
virBufferAsprintf(&opt, "file=fat:%s,", disk->src);
virBufferEscape(&opt, ',', ",", "file=fat:%s,", disk->src);
} else if (disk->type == VIR_DOMAIN_DISK_TYPE_NETWORK) {
switch (disk->protocol) {
case VIR_DOMAIN_DISK_PROTOCOL_NBD:
@ -1944,17 +1947,19 @@ qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,
virBufferAddChar(&opt, ',');
break;
case VIR_DOMAIN_DISK_PROTOCOL_SHEEPDOG:
if (disk->nhosts == 0)
virBufferAsprintf(&opt, "file=sheepdog:%s,", disk->src);
else
if (disk->nhosts == 0) {
virBufferEscape(&opt, ',', ",", "file=sheepdog:%s,",
disk->src);
} else {
/* only one host is supported now */
virBufferAsprintf(&opt, "file=sheepdog:%s:%s:%s,",
disk->hosts->name, disk->hosts->port,
disk->src);
virBufferAsprintf(&opt, "file=sheepdog:%s:%s:",
disk->hosts->name, disk->hosts->port);
virBufferEscape(&opt, ',', ",", "%s,", disk->src);
}
break;
}
} else {
virBufferAsprintf(&opt, "file=%s,", disk->src);
virBufferEscape(&opt, ',', ",", "file=%s,", disk->src);
}
}
if (qemuCapsGet(qemuCaps, QEMU_CAPS_DEVICE))
@ -2135,7 +2140,6 @@ error:
return NULL;
}
char *
qemuBuildDriveDevStr(virDomainDefPtr def,
virDomainDiskDefPtr disk,
@ -6130,7 +6134,14 @@ qemuParseKeywords(const char *str,
char *keyword;
char *value = NULL;
if (!(endmark = strchr(start, ',')))
endmark = start;
do {
/* Qemu accepts ',,' as an escape for a literal comma;
* skip past those here while searching for the end of the
* value, then strip them down below */
endmark = strchr(endmark, ',');
} while (endmark && endmark[1] == ',' && (endmark += 2));
if (!endmark)
endmark = end;
if (!(separator = strchr(start, '=')))
separator = end;
@ -6153,6 +6164,16 @@ qemuParseKeywords(const char *str,
VIR_FREE(keyword);
goto no_memory;
}
if (strchr(value, ',')) {
char *p = strchr(value, ',') + 1;
char *q = p + 1;
while (*q) {
if (*q == ',')
q++;
*p++ = *q++;
}
*p = '\0';
}
}
if (keywordAlloc == keywordCount) {

11
src/util/buf.c
View File

@ -1,7 +1,7 @@
/*
* buf.c: buffers for libvirt
*
* Copyright (C) 2005-2008, 2010-2011 Red Hat, Inc.
* Copyright (C) 2005-2008, 2010-2012 Red Hat, Inc.
*
* See COPYING.LIB for the License of this software
*
@ -423,22 +423,23 @@ virBufferEscapeSexpr(virBufferPtr buf,
const char *format,
const char *str)
{
virBufferEscape(buf, "\\'", format, str);
virBufferEscape(buf, '\\', "\\'", format, str);
}
/**
* virBufferEscape:
* @buf: the buffer to append to
* @escape: the escape character to inject
* @toescape: NUL-terminated list of characters to escape
* @format: a printf like format string but with only one %s parameter
* @str: the string argument which needs to be escaped
*
* Do a formatted print with a single string to a buffer. Any characters
* in the provided list are escaped with a preceeding \. Auto indentation
* in the provided list are escaped with the given escape. Auto indentation
* may be applied.
*/
void
virBufferEscape(virBufferPtr buf, const char *toescape,
virBufferEscape(virBufferPtr buf, char escape, const char *toescape,
const char *format, const char *str)
{
int len;
@ -471,7 +472,7 @@ virBufferEscape(virBufferPtr buf, const char *toescape,
*/
char needle[2] = { *cur, 0 };
if (strstr(toescape, needle))
*out++ = '\\';
*out++ = escape;
*out++ = *cur;
cur++;
}

4
src/util/buf.h
View File

@ -1,7 +1,7 @@
/*
* buf.h: buffers for libvirt
*
* Copyright (C) 2005-2008, 2011 Red Hat, Inc.
* Copyright (C) 2005-2008, 2011, 2012 Red Hat, Inc.
*
* See COPYING.LIB for the License of this software
*
@ -49,7 +49,7 @@ void virBufferVasprintf(virBufferPtr buf, const char *format, va_list ap)
ATTRIBUTE_FMT_PRINTF(2, 0);
void virBufferStrcat(virBufferPtr buf, ...)
ATTRIBUTE_SENTINEL;
void virBufferEscape(virBufferPtr buf, const char *toescape,
void virBufferEscape(virBufferPtr buf, char escape, const char *toescape,
const char *format, const char *str);
void virBufferEscapeString(virBufferPtr buf, const char *format,
const char *str);

6
tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-sheepdog.args
View File

@ -1,5 +1,5 @@
LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M \
pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait \
-no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0 -drive \
file=sheepdog:example.org:6000:image,if=virtio,format=raw -net none -serial \
none -parallel none -usb
-no-acpi -boot c -drive file=/dev/HostVG/QEMU,,Guest,,,,1,if=ide,bus=0,unit=0 \
-drive file=sheepdog:example.org:6000:image,,with,,commas,if=virtio,format=raw \
-net none -serial none -parallel none -usb

4
tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-sheepdog.xml
View File

@ -15,13 +15,13 @@
<devices>
<emulator>/usr/bin/qemu</emulator>
<disk type='block' device='disk'>
<source dev='/dev/HostVG/QEMUGuest1'/>
<source dev='/dev/HostVG/QEMU,Guest,,1'/>
<target dev='hda' bus='ide'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='network' device='disk'>
<driver name='qemu' type='raw'/>
<source protocol='sheepdog' name='image'>
<source protocol='sheepdog' name='image,with,commas'>
<host name='example.org' port='6000'/>
</source>
<target dev='vda' bus='virtio'/>