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libvirt/libvirt-svirt-relabel-qcow2-backing-files.patch
Mark McLoughlin f9c1b758c3 - Re-label qcow2 backing files (#497131)
2009-10-01 15:17:31 +00:00

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From 5bb2da190bc6d5a36952315dd48a00709f88c3c2 Mon Sep 17 00:00:00 2001
From: Mark McLoughlin <markmc@redhat.com>
Date: Fri, 25 Sep 2009 14:20:13 +0100
Subject: [PATCH] Re-label image file backing stores
Use virStorageFileGetMetadata() to find any backing stores for images
and re-label them
Without this, qemu cannot access qcow2 backing files, see:
https://bugzilla.redhat.com/497131
* src/security/security_selinux.c: re-label backing store files in
SELinuxSetSecurityImageLabel()
(cherry picked from commit fe627697a3830cd2db0efcc201d8caa9e171263d)
Includes the following commits:
util.h needs libvirt.h for virConnectPtr
Seems standard to include internal.h in order to pull in libvirt.h
* src/util/util.h: include internal.h
(cherry picked from commit 25e2857c219e7fb91412746f7919931552c4e07a)
Move file format enum to libvirt_util
Rename virStorageVolFormatFileSystem to virStorageFileFormat and
move to src/util/storage_file.[ch]
* src/Makefile.am: add src/util/storage_file.[ch]
* src/conf/storage_conf.[ch]: move enum from here ...
* src/util/storage_file.[ch]: .. to here
* src/libvirt_private.syms: update To/FromString exports
* src/storage/storage_backend.c, src/storage/storage_backend_fs.c,
src/vbox/vbox_tmpl.c: update for above changes
(cherry picked from commit 00fd3ff49bb1e4578756a32a812fdbf5ee335d8c)
Split virStorageGetMetadataFromFD() from virStorageBackendProbeTarget()
Prepare the code probing a file's format and associated metadata for
moving into libvirt_util.
* src/storage/storage_backend_fs.c: re-factor the format and metadata
probing code in preparation for moving it
(cherry picked from commit f5fc670638d94776a4eba55f5affa69f69ba1ae2)
Introduce virStorageFileMetadata structure
Introduce a metadata structure and make virStorageGetMetadataFromFD()
fill it in.
* src/util/storage_file.h: add virStorageFileMetadata
* src/backend/storage_backend_fs.c: virStorageGetMetadataFromFD() now
fills in the virStorageFileMetadata structure
(cherry picked from commit 5fede0a90be565e1c44b7c8236cb8910fd06b52f)
Move virStorageGetMetadataFromFD() to libvirt_util
Finally, we get to the point of all this.
Move virStorageGetMetadataFromFD() to virStorageFileGetMetadataFromFD()
and move to src/util/storage_file.[ch]
There's no functional changes in this patch, just code movement
* src/storage/storage_backend_fs.c: move code from here ...
* src/util/storage_file.[ch]: ... to here
* src/libvirt_private.syms: export virStorageFileGetMetadataFromFD()
(cherry picked from commit a010fb58d6bce026852d611e32302da7687639e5)
Add virStorageFileGetMetadata() helper
* src/util/storage_file.c: add virStorageFileGetMetadata() so that
the caller does not need to open the file
(cherry picked from commit 295fd6e8330c7416e2d97634364f2890133c28fa)
Fedora-patch: libvirt-svirt-relabel-qcow2-backing-files.patch
---
src/Makefile.am | 1 +
src/libvirt_private.syms | 7 +-
src/security_selinux.c | 28 +++
src/storage_backend.c | 17 +-
src/storage_backend_fs.c | 418 +++++----------------------------------------
src/storage_conf.c | 25 +--
src/storage_conf.h | 17 --
src/storage_file.c | 424 ++++++++++++++++++++++++++++++++++++++++++++++
src/storage_file.h | 62 +++++++
src/util.h | 1 +
src/vbox/vbox_tmpl.c | 15 +-
11 files changed, 591 insertions(+), 424 deletions(-)
create mode 100644 src/storage_file.c
create mode 100644 src/storage_file.h
diff --git a/src/Makefile.am b/src/Makefile.am
index 463252e..3d279f2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -54,6 +54,7 @@ UTIL_SOURCES = \
hostusb.c hostusb.h \
qparams.c qparams.h \
storage_encryption_conf.h storage_encryption_conf.c \
+ storage_file.c storage_file.h \
threads.c threads.h \
threads-pthread.h \
threads-win32.h \
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 867678f..500c209 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -359,8 +359,6 @@ virStorageVolDefParseNode;
virStoragePoolFormatDiskTypeToString;
virStoragePoolFormatFileSystemTypeToString;
virStoragePoolFormatFileSystemNetTypeToString;
-virStorageVolFormatFileSystemTypeToString;
-virStorageVolFormatFileSystemTypeFromString;
virStoragePoolTypeFromString;
virStoragePartedFsTypeTypeToString;
virStoragePoolObjLock;
@@ -373,6 +371,11 @@ virStorageEncryptionParseNode;
virStorageEncryptionFormat;
virStorageGenerateQcowPassphrase;
+# storage_file.h
+virStorageFileFormatTypeToString;
+virStorageFileFormatTypeFromString;
+virStorageFileGetMetadata;
+virStorageFileGetMetadataFromFD;
# threads.h
virMutexInit;
diff --git a/src/security_selinux.c b/src/security_selinux.c
index b4dc153..600fc75 100644
--- a/src/security_selinux.c
+++ b/src/security_selinux.c
@@ -27,6 +27,7 @@
#include "logging.h"
#include "pci.h"
#include "hostusb.h"
+#include "storage_file.h"
#define VIR_FROM_THIS VIR_FROM_SECURITY
@@ -403,10 +404,37 @@ SELinuxSetSecurityImageLabel(virConnectPtr conn,
{
const virSecurityLabelDefPtr secdef = &vm->def->seclabel;
+ const char *path;
if (!disk->src)
return 0;
+ path = disk->src;
+ do {
+ virStorageFileMetadata meta;
+ int ret;
+
+ memset(&meta, 0, sizeof(meta));
+
+ ret = virStorageFileGetMetadata(conn, path, &meta);
+
+ if (path != disk->src)
+ VIR_FREE(path);
+ path = NULL;
+
+ if (ret < 0)
+ return -1;
+
+ if (meta.backingStore != NULL &&
+ SELinuxSetFilecon(conn, meta.backingStore,
+ default_content_context) < 0) {
+ VIR_FREE(meta.backingStore);
+ return -1;
+ }
+
+ path = meta.backingStore;
+ } while (path != NULL);
+
if (disk->shared) {
return SELinuxSetFilecon(conn, disk->src, default_image_context);
} else if (disk->readonly) {
diff --git a/src/storage_backend.c b/src/storage_backend.c
index 800d4ea..1b65c5d 100644
--- a/src/storage_backend.c
+++ b/src/storage_backend.c
@@ -51,6 +51,7 @@
#include "internal.h"
#include "secret_conf.h"
#include "uuid.h"
+#include "storage_file.h"
#include "storage_backend.h"
#include "logging.h"
@@ -462,16 +463,16 @@ virStorageBackendCreateQemuImg(virConnectPtr conn,
char *create_tool;
short use_kvmimg;
- const char *type = virStorageVolFormatFileSystemTypeToString(vol->target.format);
+ const char *type = virStorageFileFormatTypeToString(vol->target.format);
const char *backingType = vol->backingStore.path ?
- virStorageVolFormatFileSystemTypeToString(vol->backingStore.format) : NULL;
+ virStorageFileFormatTypeToString(vol->backingStore.format) : NULL;
const char *inputBackingPath = (inputvol ? inputvol->backingStore.path
: NULL);
const char *inputPath = inputvol ? inputvol->target.path : NULL;
/* Treat input block devices as 'raw' format */
const char *inputType = inputPath ?
- virStorageVolFormatFileSystemTypeToString(inputvol->type == VIR_STORAGE_VOL_BLOCK ? VIR_STORAGE_VOL_FILE_RAW : inputvol->target.format) :
+ virStorageFileFormatTypeToString(inputvol->type == VIR_STORAGE_VOL_BLOCK ? VIR_STORAGE_FILE_RAW : inputvol->target.format) :
NULL;
const char **imgargv;
@@ -552,8 +553,8 @@ virStorageBackendCreateQemuImg(virConnectPtr conn,
if (vol->target.encryption != NULL) {
virStorageEncryptionPtr enc;
- if (vol->target.format != VIR_STORAGE_VOL_FILE_QCOW &&
- vol->target.format != VIR_STORAGE_VOL_FILE_QCOW2) {
+ if (vol->target.format != VIR_STORAGE_FILE_QCOW &&
+ vol->target.format != VIR_STORAGE_FILE_QCOW2) {
virStorageReportError(conn, VIR_ERR_NO_SUPPORT,
_("qcow volume encryption unsupported with "
"volume format %s"), type);
@@ -644,7 +645,7 @@ virStorageBackendCreateQcowCreate(virConnectPtr conn,
return -1;
}
- if (vol->target.format != VIR_STORAGE_VOL_FILE_QCOW2) {
+ if (vol->target.format != VIR_STORAGE_FILE_QCOW2) {
virStorageReportError(conn, VIR_ERR_INTERNAL_ERROR,
_("unsupported storage vol type %d"),
vol->target.format);
@@ -735,9 +736,9 @@ virStorageBackendGetBuildVolFromFunction(virConnectPtr conn,
* tool for converting
*/
if ((vol->type == VIR_STORAGE_VOL_FILE &&
- vol->target.format != VIR_STORAGE_VOL_FILE_RAW) ||
+ vol->target.format != VIR_STORAGE_FILE_RAW) ||
(inputvol->type == VIR_STORAGE_VOL_FILE &&
- inputvol->target.format != VIR_STORAGE_VOL_FILE_RAW)) {
+ inputvol->target.format != VIR_STORAGE_FILE_RAW)) {
if ((tool_type = virStorageBackendFindFSImageTool(NULL)) < 0) {
virStorageReportError(conn, VIR_ERR_INTERNAL_ERROR,
diff --git a/src/storage_backend_fs.c b/src/storage_backend_fs.c
index 01cb171..6816da8 100644
--- a/src/storage_backend_fs.c
+++ b/src/storage_backend_fs.c
@@ -41,259 +41,24 @@
#include "virterror_internal.h"
#include "storage_backend_fs.h"
#include "storage_conf.h"
+#include "storage_file.h"
#include "util.h"
#include "memory.h"
#include "xml.h"
-enum lv_endian {
- LV_LITTLE_ENDIAN = 1, /* 1234 */
- LV_BIG_ENDIAN /* 4321 */
-};
-
-enum {
- BACKING_STORE_OK,
- BACKING_STORE_INVALID,
- BACKING_STORE_ERROR,
-};
-
-static int cowGetBackingStore(virConnectPtr, char **,
- const unsigned char *, size_t);
-static int qcowXGetBackingStore(virConnectPtr, char **,
- const unsigned char *, size_t);
-static int vmdk4GetBackingStore(virConnectPtr, char **,
- const unsigned char *, size_t);
-
-/* Either 'magic' or 'extension' *must* be provided */
-struct FileTypeInfo {
- int type; /* One of the constants above */
- const char *magic; /* Optional string of file magic
- * to check at head of file */
- const char *extension; /* Optional file extension to check */
- enum lv_endian endian; /* Endianness of file format */
- int versionOffset; /* Byte offset from start of file
- * where we find version number,
- * -1 to skip version test */
- int versionNumber; /* Version number to validate */
- int sizeOffset; /* Byte offset from start of file
- * where we find capacity info,
- * -1 to use st_size as capacity */
- int sizeBytes; /* Number of bytes for size field */
- int sizeMultiplier; /* A scaling factor if size is not in bytes */
- /* Store a COW base image path (possibly relative),
- * or NULL if there is no COW base image, to RES;
- * return BACKING_STORE_* */
- int qcowCryptOffset; /* Byte offset from start of file
- * where to find encryption mode,
- * -1 if encryption is not used */
- int (*getBackingStore)(virConnectPtr conn, char **res,
- const unsigned char *buf, size_t buf_size);
-};
-struct FileTypeInfo const fileTypeInfo[] = {
- /* Bochs */
- /* XXX Untested
- { VIR_STORAGE_VOL_FILE_BOCHS, "Bochs Virtual HD Image", NULL,
- LV_LITTLE_ENDIAN, 64, 0x20000,
- 32+16+16+4+4+4+4+4, 8, 1, -1, NULL },*/
- /* CLoop */
- /* XXX Untested
- { VIR_STORAGE_VOL_CLOOP, "#!/bin/sh\n#V2.0 Format\nmodprobe cloop file=$0 && mount -r -t iso9660 /dev/cloop $1\n", NULL,
- LV_LITTLE_ENDIAN, -1, 0,
- -1, 0, 0, -1, NULL }, */
- /* Cow */
- { VIR_STORAGE_VOL_FILE_COW, "OOOM", NULL,
- LV_BIG_ENDIAN, 4, 2,
- 4+4+1024+4, 8, 1, -1, cowGetBackingStore },
- /* DMG */
- /* XXX QEMU says there's no magic for dmg, but we should check... */
- { VIR_STORAGE_VOL_FILE_DMG, NULL, ".dmg",
- 0, -1, 0,
- -1, 0, 0, -1, NULL },
- /* XXX there's probably some magic for iso we can validate too... */
- { VIR_STORAGE_VOL_FILE_ISO, NULL, ".iso",
- 0, -1, 0,
- -1, 0, 0, -1, NULL },
- /* Parallels */
- /* XXX Untested
- { VIR_STORAGE_VOL_FILE_PARALLELS, "WithoutFreeSpace", NULL,
- LV_LITTLE_ENDIAN, 16, 2,
- 16+4+4+4+4, 4, 512, -1, NULL },
- */
- /* QCow */
- { VIR_STORAGE_VOL_FILE_QCOW, "QFI", NULL,
- LV_BIG_ENDIAN, 4, 1,
- 4+4+8+4+4, 8, 1, 4+4+8+4+4+8+1+1+2, qcowXGetBackingStore },
- /* QCow 2 */
- { VIR_STORAGE_VOL_FILE_QCOW2, "QFI", NULL,
- LV_BIG_ENDIAN, 4, 2,
- 4+4+8+4+4, 8, 1, 4+4+8+4+4+8, qcowXGetBackingStore },
- /* VMDK 3 */
- /* XXX Untested
- { VIR_STORAGE_VOL_FILE_VMDK, "COWD", NULL,
- LV_LITTLE_ENDIAN, 4, 1,
- 4+4+4, 4, 512, -1, NULL },
- */
- /* VMDK 4 */
- { VIR_STORAGE_VOL_FILE_VMDK, "KDMV", NULL,
- LV_LITTLE_ENDIAN, 4, 1,
- 4+4+4, 8, 512, -1, vmdk4GetBackingStore },
- /* Connectix / VirtualPC */
- /* XXX Untested
- { VIR_STORAGE_VOL_FILE_VPC, "conectix", NULL,
- LV_BIG_ENDIAN, -1, 0,
- -1, 0, 0, -1, NULL},
- */
-};
-
#define VIR_FROM_THIS VIR_FROM_STORAGE
static int
-cowGetBackingStore(virConnectPtr conn,
- char **res,
- const unsigned char *buf,
- size_t buf_size)
-{
-#define COW_FILENAME_MAXLEN 1024
- *res = NULL;
- if (buf_size < 4+4+ COW_FILENAME_MAXLEN)
- return BACKING_STORE_INVALID;
- if (buf[4+4] == '\0') /* cow_header_v2.backing_file[0] */
- return BACKING_STORE_OK;
-
- *res = strndup ((const char*)buf + 4+4, COW_FILENAME_MAXLEN);
- if (*res == NULL) {
- virReportOOMError(conn);
- return BACKING_STORE_ERROR;
- }
- return BACKING_STORE_OK;
-}
-
-static int
-qcowXGetBackingStore(virConnectPtr conn,
- char **res,
- const unsigned char *buf,
- size_t buf_size)
-{
- unsigned long long offset;
- unsigned long size;
-
- *res = NULL;
- if (buf_size < 4+4+8+4)
- return BACKING_STORE_INVALID;
- offset = (((unsigned long long)buf[4+4] << 56)
- | ((unsigned long long)buf[4+4+1] << 48)
- | ((unsigned long long)buf[4+4+2] << 40)
- | ((unsigned long long)buf[4+4+3] << 32)
- | ((unsigned long long)buf[4+4+4] << 24)
- | ((unsigned long long)buf[4+4+5] << 16)
- | ((unsigned long long)buf[4+4+6] << 8)
- | buf[4+4+7]); /* QCowHeader.backing_file_offset */
- if (offset > buf_size)
- return BACKING_STORE_INVALID;
- size = ((buf[4+4+8] << 24)
- | (buf[4+4+8+1] << 16)
- | (buf[4+4+8+2] << 8)
- | buf[4+4+8+3]); /* QCowHeader.backing_file_size */
- if (size == 0)
- return BACKING_STORE_OK;
- if (offset + size > buf_size || offset + size < offset)
- return BACKING_STORE_INVALID;
- if (size + 1 == 0)
- return BACKING_STORE_INVALID;
- if (VIR_ALLOC_N(*res, size + 1) < 0) {
- virReportOOMError(conn);
- return BACKING_STORE_ERROR;
- }
- memcpy(*res, buf + offset, size);
- (*res)[size] = '\0';
- return BACKING_STORE_OK;
-}
-
-
-static int
-vmdk4GetBackingStore(virConnectPtr conn,
- char **res,
- const unsigned char *buf,
- size_t buf_size)
-{
- static const char prefix[] = "parentFileNameHint=\"";
-
- char desc[20*512 + 1], *start, *end;
- size_t len;
-
- *res = NULL;
-
- if (buf_size <= 0x200)
- return BACKING_STORE_INVALID;
- len = buf_size - 0x200;
- if (len > sizeof(desc) - 1)
- len = sizeof(desc) - 1;
- memcpy(desc, buf + 0x200, len);
- desc[len] = '\0';
- start = strstr(desc, prefix);
- if (start == NULL)
- return BACKING_STORE_OK;
- start += strlen(prefix);
- end = strchr(start, '"');
- if (end == NULL)
- return BACKING_STORE_INVALID;
- if (end == start)
- return BACKING_STORE_OK;
- *end = '\0';
- *res = strdup(start);
- if (*res == NULL) {
- virReportOOMError(conn);
- return BACKING_STORE_ERROR;
- }
- return BACKING_STORE_OK;
-}
-
-/**
- * Return an absolute path corresponding to PATH, which is absolute or relative
- * to the directory containing BASE_FILE, or NULL on error
- */
-static char *absolutePathFromBaseFile(const char *base_file, const char *path)
+virStorageBackendProbeTarget(virConnectPtr conn,
+ virStorageVolTargetPtr target,
+ char **backingStore,
+ unsigned long long *allocation,
+ unsigned long long *capacity,
+ virStorageEncryptionPtr *encryption)
{
- size_t base_size, path_size;
- char *res, *p;
-
- if (*path == '/')
- return strdup(path);
-
- base_size = strlen(base_file) + 1;
- path_size = strlen(path) + 1;
- if (VIR_ALLOC_N(res, base_size - 1 + path_size) < 0)
- return NULL;
- memcpy(res, base_file, base_size);
- p = strrchr(res, '/');
- if (p != NULL)
- p++;
- else
- p = res;
- memcpy(p, path, path_size);
- if (VIR_REALLOC_N(res, (p + path_size) - res) < 0) {
- /* Ignore failure */
- }
- return res;
-}
-
-
-
-/**
- * Probe the header of a file to determine what type of disk image
- * it is, and info about its capacity if available.
- */
-static int virStorageBackendProbeTarget(virConnectPtr conn,
- virStorageVolTargetPtr target,
- char **backingStore,
- unsigned long long *allocation,
- unsigned long long *capacity,
- virStorageEncryptionPtr *encryption) {
- int fd;
- unsigned char head[20*512]; /* vmdk4GetBackingStore needs this much. */
- int len, i, ret;
+ int fd, ret;
+ virStorageFileMetadata meta;
- if (backingStore)
- *backingStore = NULL;
if (encryption)
*encryption = NULL;
@@ -311,148 +76,51 @@ static int virStorageBackendProbeTarget(virConnectPtr conn,
return ret; /* Take care to propagate ret, it is not always -1 */
}
- if ((len = read(fd, head, sizeof(head))) < 0) {
- virReportSystemError(conn, errno,
- _("cannot read header '%s'"),
- target->path);
+ memset(&meta, 0, sizeof(meta));
+
+ if (virStorageFileGetMetadataFromFD(conn, target->path, fd, &meta) < 0) {
close(fd);
return -1;
}
close(fd);
- /* First check file magic */
- for (i = 0 ; i < ARRAY_CARDINALITY(fileTypeInfo) ; i++) {
- int mlen;
- bool encrypted_qcow = false;
-
- if (fileTypeInfo[i].magic == NULL)
- continue;
-
- /* Validate magic data */
- mlen = strlen(fileTypeInfo[i].magic);
- if (mlen > len)
- continue;
- if (memcmp(head, fileTypeInfo[i].magic, mlen) != 0)
- continue;
-
- /* Validate version number info */
- if (fileTypeInfo[i].versionNumber != -1) {
- int version;
-
- if (fileTypeInfo[i].endian == LV_LITTLE_ENDIAN) {
- version = (head[fileTypeInfo[i].versionOffset+3] << 24) |
- (head[fileTypeInfo[i].versionOffset+2] << 16) |
- (head[fileTypeInfo[i].versionOffset+1] << 8) |
- head[fileTypeInfo[i].versionOffset];
- } else {
- version = (head[fileTypeInfo[i].versionOffset] << 24) |
- (head[fileTypeInfo[i].versionOffset+1] << 16) |
- (head[fileTypeInfo[i].versionOffset+2] << 8) |
- head[fileTypeInfo[i].versionOffset+3];
- }
- if (version != fileTypeInfo[i].versionNumber)
- continue;
- }
-
- /* Optionally extract capacity from file */
- if (fileTypeInfo[i].sizeOffset != -1 && capacity) {
- if (fileTypeInfo[i].endian == LV_LITTLE_ENDIAN) {
- *capacity =
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+7] << 56) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+6] << 48) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+5] << 40) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+4] << 32) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+3] << 24) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+2] << 16) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+1] << 8) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset]);
- } else {
- *capacity =
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset] << 56) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+1] << 48) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+2] << 40) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+3] << 32) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+4] << 24) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+5] << 16) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+6] << 8) |
- ((unsigned long long)head[fileTypeInfo[i].sizeOffset+7]);
- }
- /* Avoid unlikely, but theoretically possible overflow */
- if (*capacity > (ULLONG_MAX / fileTypeInfo[i].sizeMultiplier))
- continue;
- *capacity *= fileTypeInfo[i].sizeMultiplier;
- }
-
- if (fileTypeInfo[i].qcowCryptOffset != -1) {
- int crypt_format;
+ target->format = meta.format;
- crypt_format = (head[fileTypeInfo[i].qcowCryptOffset] << 24) |
- (head[fileTypeInfo[i].qcowCryptOffset+1] << 16) |
- (head[fileTypeInfo[i].qcowCryptOffset+2] << 8) |
- head[fileTypeInfo[i].qcowCryptOffset+3];
- encrypted_qcow = crypt_format != 0;
- }
-
- /* Validation passed, we know the file format now */
- target->format = fileTypeInfo[i].type;
- if (fileTypeInfo[i].getBackingStore != NULL && backingStore) {
- char *base;
+ if (backingStore) {
+ *backingStore = meta.backingStore;
+ meta.backingStore = NULL;
+ }
- switch (fileTypeInfo[i].getBackingStore(conn, &base, head, len)) {
- case BACKING_STORE_OK:
- break;
+ VIR_FREE(meta.backingStore);
- case BACKING_STORE_INVALID:
- continue;
+ if (capacity && meta.capacity)
+ *capacity = meta.capacity;
- case BACKING_STORE_ERROR:
- return -1;
- }
- if (base != NULL) {
- *backingStore
- = absolutePathFromBaseFile(target->path, base);
- VIR_FREE(base);
- if (*backingStore == NULL) {
- virReportOOMError(conn);
- return -1;
- }
- }
+ if (encryption != NULL && meta.encrypted) {
+ if (VIR_ALLOC(*encryption) < 0) {
+ virReportOOMError(conn);
+ if (backingStore)
+ VIR_FREE(*backingStore);
+ return -1;
}
- if (encryption != NULL && encrypted_qcow) {
- virStorageEncryptionPtr enc;
- if (VIR_ALLOC(enc) < 0) {
- virReportOOMError(conn);
- if (backingStore)
- VIR_FREE(*backingStore);
- return -1;
- }
- enc->format = VIR_STORAGE_ENCRYPTION_FORMAT_QCOW;
- *encryption = enc;
- /* XXX ideally we'd fill in secret UUID here
- * but we cannot guarentee 'conn' is non-NULL
- * at this point in time :-( So we only fill
- * in secrets when someone first queries a vol
- */
+ switch (target->format) {
+ case VIR_STORAGE_FILE_QCOW:
+ case VIR_STORAGE_FILE_QCOW2:
+ (*encryption)->format = VIR_STORAGE_ENCRYPTION_FORMAT_QCOW;
+ break;
+ default:
+ break;
}
- return 0;
- }
-
- /* No magic, so check file extension */
- for (i = 0 ; i < ARRAY_CARDINALITY(fileTypeInfo) ; i++) {
- if (fileTypeInfo[i].extension == NULL)
- continue;
-
- if (!virFileHasSuffix(target->path, fileTypeInfo[i].extension))
- continue;
- target->format = fileTypeInfo[i].type;
- return 0;
+ /* XXX ideally we'd fill in secret UUID here
+ * but we cannot guarentee 'conn' is non-NULL
+ * at this point in time :-( So we only fill
+ * in secrets when someone first queries a vol
+ */
}
- /* All fails, so call it a raw file */
- target->format = VIR_STORAGE_VOL_FILE_RAW;
return 0;
}
@@ -891,7 +559,7 @@ virStorageBackendFileSystemRefresh(virConnectPtr conn,
goto no_memory;
vol->type = VIR_STORAGE_VOL_FILE;
- vol->target.format = VIR_STORAGE_VOL_FILE_RAW; /* Real value is filled in during probe */
+ vol->target.format = VIR_STORAGE_FILE_RAW; /* Real value is filled in during probe */
if (virAsprintf(&vol->target.path, "%s/%s",
pool->def->target.path,
vol->name) == -1)
@@ -918,7 +586,7 @@ virStorageBackendFileSystemRefresh(virConnectPtr conn,
}
if (backingStore != NULL) {
- if (vol->target.format == VIR_STORAGE_VOL_FILE_QCOW2 &&
+ if (vol->target.format == VIR_STORAGE_FILE_QCOW2 &&
STRPREFIX("fmt:", backingStore)) {
char *fmtstr = backingStore + 4;
char *path = strchr(fmtstr, ':');
@@ -927,7 +595,7 @@ virStorageBackendFileSystemRefresh(virConnectPtr conn,
} else {
*path = '\0';
if ((vol->backingStore.format =
- virStorageVolFormatFileSystemTypeFromString(fmtstr)) < 0) {
+ virStorageFileFormatTypeFromString(fmtstr)) < 0) {
VIR_FREE(backingStore);
} else {
memmove(backingStore, path, strlen(path) + 1);
@@ -1121,9 +789,9 @@ _virStorageBackendFileSystemVolBuild(virConnectPtr conn,
inputvol);
if (!create_func)
return -1;
- } else if (vol->target.format == VIR_STORAGE_VOL_FILE_RAW) {
+ } else if (vol->target.format == VIR_STORAGE_FILE_RAW) {
create_func = virStorageBackendCreateRaw;
- } else if (vol->target.format == VIR_STORAGE_VOL_FILE_DIR) {
+ } else if (vol->target.format == VIR_STORAGE_FILE_DIR) {
create_func = createFileDir;
} else if ((tool_type = virStorageBackendFindFSImageTool(NULL)) != -1) {
create_func = virStorageBackendFSImageToolTypeToFunc(conn, tool_type);
diff --git a/src/storage_conf.c b/src/storage_conf.c
index cb063cc..788de15 100644
--- a/src/storage_conf.c
+++ b/src/storage_conf.c
@@ -36,6 +36,7 @@
#include "virterror_internal.h"
#include "datatypes.h"
#include "storage_conf.h"
+#include "storage_file.h"
#include "xml.h"
#include "uuid.h"
@@ -82,12 +83,6 @@ VIR_ENUM_IMPL(virStorageVolFormatDisk,
"linux-lvm", "linux-raid",
"extended")
-VIR_ENUM_IMPL(virStorageVolFormatFileSystem,
- VIR_STORAGE_VOL_FILE_LAST,
- "raw", "dir", "bochs",
- "cloop", "cow", "dmg", "iso",
- "qcow", "qcow2", "vmdk", "vpc")
-
VIR_ENUM_IMPL(virStoragePartedFsType,
VIR_STORAGE_PARTED_FS_TYPE_LAST,
"ext2", "ext2", "fat16",
@@ -150,9 +145,9 @@ static virStoragePoolTypeInfo poolTypeInfo[] = {
},
{ .poolType = VIR_STORAGE_POOL_DIR,
.volOptions = {
- .defaultFormat = VIR_STORAGE_VOL_FILE_RAW,
- .formatFromString = virStorageVolFormatFileSystemTypeFromString,
- .formatToString = virStorageVolFormatFileSystemTypeToString,
+ .defaultFormat = VIR_STORAGE_FILE_RAW,
+ .formatFromString = virStorageFileFormatTypeFromString,
+ .formatToString = virStorageFileFormatTypeToString,
},
},
{ .poolType = VIR_STORAGE_POOL_FS,
@@ -162,9 +157,9 @@ static virStoragePoolTypeInfo poolTypeInfo[] = {
.formatToString = virStoragePoolFormatFileSystemTypeToString,
},
.volOptions = {
- .defaultFormat = VIR_STORAGE_VOL_FILE_RAW,
- .formatFromString = virStorageVolFormatFileSystemTypeFromString,
- .formatToString = virStorageVolFormatFileSystemTypeToString,
+ .defaultFormat = VIR_STORAGE_FILE_RAW,
+ .formatFromString = virStorageFileFormatTypeFromString,
+ .formatToString = virStorageFileFormatTypeToString,
},
},
{ .poolType = VIR_STORAGE_POOL_NETFS,
@@ -176,9 +171,9 @@ static virStoragePoolTypeInfo poolTypeInfo[] = {
.formatToString = virStoragePoolFormatFileSystemNetTypeToString,
},
.volOptions = {
- .defaultFormat = VIR_STORAGE_VOL_FILE_RAW,
- .formatFromString = virStorageVolFormatFileSystemTypeFromString,
- .formatToString = virStorageVolFormatFileSystemTypeToString,
+ .defaultFormat = VIR_STORAGE_FILE_RAW,
+ .formatFromString = virStorageFileFormatTypeFromString,
+ .formatToString = virStorageFileFormatTypeToString,
},
},
{ .poolType = VIR_STORAGE_POOL_ISCSI,
diff --git a/src/storage_conf.h b/src/storage_conf.h
index 421d305..9fedb12 100644
--- a/src/storage_conf.h
+++ b/src/storage_conf.h
@@ -429,23 +429,6 @@ enum virStoragePoolFormatLogical {
};
VIR_ENUM_DECL(virStoragePoolFormatLogical)
-
-enum virStorageVolFormatFileSystem {
- VIR_STORAGE_VOL_FILE_RAW = 0,
- VIR_STORAGE_VOL_FILE_DIR,
- VIR_STORAGE_VOL_FILE_BOCHS,
- VIR_STORAGE_VOL_FILE_CLOOP,
- VIR_STORAGE_VOL_FILE_COW,
- VIR_STORAGE_VOL_FILE_DMG,
- VIR_STORAGE_VOL_FILE_ISO,
- VIR_STORAGE_VOL_FILE_QCOW,
- VIR_STORAGE_VOL_FILE_QCOW2,
- VIR_STORAGE_VOL_FILE_VMDK,
- VIR_STORAGE_VOL_FILE_VPC,
- VIR_STORAGE_VOL_FILE_LAST,
-};
-VIR_ENUM_DECL(virStorageVolFormatFileSystem)
-
/*
* XXX these are basically partition types.
*
diff --git a/src/storage_file.c b/src/storage_file.c
new file mode 100644
index 0000000..44057d2
--- /dev/null
+++ b/src/storage_file.c
@@ -0,0 +1,424 @@
+/*
+ * storage_file.c: file utility functions for FS storage backend
+ *
+ * Copyright (C) 2007-2009 Red Hat, Inc.
+ * Copyright (C) 2007-2008 Daniel P. Berrange
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Daniel P. Berrange <berrange@redhat.com>
+ */
+
+#include <config.h>
+#include "storage_file.h"
+
+#include <unistd.h>
+#include <fcntl.h>
+#include "memory.h"
+#include "virterror_internal.h"
+
+#define VIR_FROM_THIS VIR_FROM_STORAGE
+
+VIR_ENUM_IMPL(virStorageFileFormat,
+ VIR_STORAGE_FILE_LAST,
+ "raw", "dir", "bochs",
+ "cloop", "cow", "dmg", "iso",
+ "qcow", "qcow2", "vmdk", "vpc")
+
+enum lv_endian {
+ LV_LITTLE_ENDIAN = 1, /* 1234 */
+ LV_BIG_ENDIAN /* 4321 */
+};
+
+enum {
+ BACKING_STORE_OK,
+ BACKING_STORE_INVALID,
+ BACKING_STORE_ERROR,
+};
+
+/* Either 'magic' or 'extension' *must* be provided */
+struct FileTypeInfo {
+ int type; /* One of the constants above */
+ const char *magic; /* Optional string of file magic
+ * to check at head of file */
+ const char *extension; /* Optional file extension to check */
+ enum lv_endian endian; /* Endianness of file format */
+ int versionOffset; /* Byte offset from start of file
+ * where we find version number,
+ * -1 to skip version test */
+ int versionNumber; /* Version number to validate */
+ int sizeOffset; /* Byte offset from start of file
+ * where we find capacity info,
+ * -1 to use st_size as capacity */
+ int sizeBytes; /* Number of bytes for size field */
+ int sizeMultiplier; /* A scaling factor if size is not in bytes */
+ /* Store a COW base image path (possibly relative),
+ * or NULL if there is no COW base image, to RES;
+ * return BACKING_STORE_* */
+ int qcowCryptOffset; /* Byte offset from start of file
+ * where to find encryption mode,
+ * -1 if encryption is not used */
+ int (*getBackingStore)(virConnectPtr conn, char **res,
+ const unsigned char *buf, size_t buf_size);
+};
+
+static int cowGetBackingStore(virConnectPtr, char **,
+ const unsigned char *, size_t);
+static int qcowXGetBackingStore(virConnectPtr, char **,
+ const unsigned char *, size_t);
+static int vmdk4GetBackingStore(virConnectPtr, char **,
+ const unsigned char *, size_t);
+
+
+static struct FileTypeInfo const fileTypeInfo[] = {
+ /* Bochs */
+ /* XXX Untested
+ { VIR_STORAGE_FILE_BOCHS, "Bochs Virtual HD Image", NULL,
+ LV_LITTLE_ENDIAN, 64, 0x20000,
+ 32+16+16+4+4+4+4+4, 8, 1, -1, NULL },*/
+ /* CLoop */
+ /* XXX Untested
+ { VIR_STORAGE_VOL_CLOOP, "#!/bin/sh\n#V2.0 Format\nmodprobe cloop file=$0 && mount -r -t iso9660 /dev/cloop $1\n", NULL,
+ LV_LITTLE_ENDIAN, -1, 0,
+ -1, 0, 0, -1, NULL }, */
+ /* Cow */
+ { VIR_STORAGE_FILE_COW, "OOOM", NULL,
+ LV_BIG_ENDIAN, 4, 2,
+ 4+4+1024+4, 8, 1, -1, cowGetBackingStore },
+ /* DMG */
+ /* XXX QEMU says there's no magic for dmg, but we should check... */
+ { VIR_STORAGE_FILE_DMG, NULL, ".dmg",
+ 0, -1, 0,
+ -1, 0, 0, -1, NULL },
+ /* XXX there's probably some magic for iso we can validate too... */
+ { VIR_STORAGE_FILE_ISO, NULL, ".iso",
+ 0, -1, 0,
+ -1, 0, 0, -1, NULL },
+ /* Parallels */
+ /* XXX Untested
+ { VIR_STORAGE_FILE_PARALLELS, "WithoutFreeSpace", NULL,
+ LV_LITTLE_ENDIAN, 16, 2,
+ 16+4+4+4+4, 4, 512, -1, NULL },
+ */
+ /* QCow */
+ { VIR_STORAGE_FILE_QCOW, "QFI", NULL,
+ LV_BIG_ENDIAN, 4, 1,
+ 4+4+8+4+4, 8, 1, 4+4+8+4+4+8+1+1+2, qcowXGetBackingStore },
+ /* QCow 2 */
+ { VIR_STORAGE_FILE_QCOW2, "QFI", NULL,
+ LV_BIG_ENDIAN, 4, 2,
+ 4+4+8+4+4, 8, 1, 4+4+8+4+4+8, qcowXGetBackingStore },
+ /* VMDK 3 */
+ /* XXX Untested
+ { VIR_STORAGE_FILE_VMDK, "COWD", NULL,
+ LV_LITTLE_ENDIAN, 4, 1,
+ 4+4+4, 4, 512, -1, NULL },
+ */
+ /* VMDK 4 */
+ { VIR_STORAGE_FILE_VMDK, "KDMV", NULL,
+ LV_LITTLE_ENDIAN, 4, 1,
+ 4+4+4, 8, 512, -1, vmdk4GetBackingStore },
+ /* Connectix / VirtualPC */
+ /* XXX Untested
+ { VIR_STORAGE_FILE_VPC, "conectix", NULL,
+ LV_BIG_ENDIAN, -1, 0,
+ -1, 0, 0, -1, NULL},
+ */
+};
+
+static int
+cowGetBackingStore(virConnectPtr conn,
+ char **res,
+ const unsigned char *buf,
+ size_t buf_size)
+{
+#define COW_FILENAME_MAXLEN 1024
+ *res = NULL;
+ if (buf_size < 4+4+ COW_FILENAME_MAXLEN)
+ return BACKING_STORE_INVALID;
+ if (buf[4+4] == '\0') /* cow_header_v2.backing_file[0] */
+ return BACKING_STORE_OK;
+
+ *res = strndup ((const char*)buf + 4+4, COW_FILENAME_MAXLEN);
+ if (*res == NULL) {
+ virReportOOMError(conn);
+ return BACKING_STORE_ERROR;
+ }
+ return BACKING_STORE_OK;
+}
+
+static int
+qcowXGetBackingStore(virConnectPtr conn,
+ char **res,
+ const unsigned char *buf,
+ size_t buf_size)
+{
+ unsigned long long offset;
+ unsigned long size;
+
+ *res = NULL;
+ if (buf_size < 4+4+8+4)
+ return BACKING_STORE_INVALID;
+ offset = (((unsigned long long)buf[4+4] << 56)
+ | ((unsigned long long)buf[4+4+1] << 48)
+ | ((unsigned long long)buf[4+4+2] << 40)
+ | ((unsigned long long)buf[4+4+3] << 32)
+ | ((unsigned long long)buf[4+4+4] << 24)
+ | ((unsigned long long)buf[4+4+5] << 16)
+ | ((unsigned long long)buf[4+4+6] << 8)
+ | buf[4+4+7]); /* QCowHeader.backing_file_offset */
+ if (offset > buf_size)
+ return BACKING_STORE_INVALID;
+ size = ((buf[4+4+8] << 24)
+ | (buf[4+4+8+1] << 16)
+ | (buf[4+4+8+2] << 8)
+ | buf[4+4+8+3]); /* QCowHeader.backing_file_size */
+ if (size == 0)
+ return BACKING_STORE_OK;
+ if (offset + size > buf_size || offset + size < offset)
+ return BACKING_STORE_INVALID;
+ if (size + 1 == 0)
+ return BACKING_STORE_INVALID;
+ if (VIR_ALLOC_N(*res, size + 1) < 0) {
+ virReportOOMError(conn);
+ return BACKING_STORE_ERROR;
+ }
+ memcpy(*res, buf + offset, size);
+ (*res)[size] = '\0';
+ return BACKING_STORE_OK;
+}
+
+
+static int
+vmdk4GetBackingStore(virConnectPtr conn,
+ char **res,
+ const unsigned char *buf,
+ size_t buf_size)
+{
+ static const char prefix[] = "parentFileNameHint=\"";
+
+ char desc[20*512 + 1], *start, *end;
+ size_t len;
+
+ *res = NULL;
+
+ if (buf_size <= 0x200)
+ return BACKING_STORE_INVALID;
+ len = buf_size - 0x200;
+ if (len > sizeof(desc) - 1)
+ len = sizeof(desc) - 1;
+ memcpy(desc, buf + 0x200, len);
+ desc[len] = '\0';
+ start = strstr(desc, prefix);
+ if (start == NULL)
+ return BACKING_STORE_OK;
+ start += strlen(prefix);
+ end = strchr(start, '"');
+ if (end == NULL)
+ return BACKING_STORE_INVALID;
+ if (end == start)
+ return BACKING_STORE_OK;
+ *end = '\0';
+ *res = strdup(start);
+ if (*res == NULL) {
+ virReportOOMError(conn);
+ return BACKING_STORE_ERROR;
+ }
+ return BACKING_STORE_OK;
+}
+
+/**
+ * Return an absolute path corresponding to PATH, which is absolute or relative
+ * to the directory containing BASE_FILE, or NULL on error
+ */
+static char *
+absolutePathFromBaseFile(const char *base_file, const char *path)
+{
+ size_t base_size, path_size;
+ char *res, *p;
+
+ if (*path == '/')
+ return strdup(path);
+
+ base_size = strlen(base_file) + 1;
+ path_size = strlen(path) + 1;
+ if (VIR_ALLOC_N(res, base_size - 1 + path_size) < 0)
+ return NULL;
+ memcpy(res, base_file, base_size);
+ p = strrchr(res, '/');
+ if (p != NULL)
+ p++;
+ else
+ p = res;
+ memcpy(p, path, path_size);
+ if (VIR_REALLOC_N(res, (p + path_size) - res) < 0) {
+ /* Ignore failure */
+ }
+ return res;
+}
+
+/**
+ * Probe the header of a file to determine what type of disk image
+ * it is, and info about its capacity if available.
+ */
+int
+virStorageFileGetMetadataFromFD(virConnectPtr conn,
+ const char *path,
+ int fd,
+ virStorageFileMetadata *meta)
+{
+ unsigned char head[20*512]; /* vmdk4GetBackingStore needs this much. */
+ int len, i;
+
+ /* If all else fails, call it a raw file */
+ meta->format = VIR_STORAGE_FILE_RAW;
+
+ if ((len = read(fd, head, sizeof(head))) < 0) {
+ virReportSystemError(conn, errno, _("cannot read header '%s'"), path);
+ return -1;
+ }
+
+ /* First check file magic */
+ for (i = 0 ; i < ARRAY_CARDINALITY(fileTypeInfo) ; i++) {
+ int mlen;
+
+ if (fileTypeInfo[i].magic == NULL)
+ continue;
+
+ /* Validate magic data */
+ mlen = strlen(fileTypeInfo[i].magic);
+ if (mlen > len)
+ continue;
+ if (memcmp(head, fileTypeInfo[i].magic, mlen) != 0)
+ continue;
+
+ /* Validate version number info */
+ if (fileTypeInfo[i].versionNumber != -1) {
+ int version;
+
+ if (fileTypeInfo[i].endian == LV_LITTLE_ENDIAN) {
+ version = (head[fileTypeInfo[i].versionOffset+3] << 24) |
+ (head[fileTypeInfo[i].versionOffset+2] << 16) |
+ (head[fileTypeInfo[i].versionOffset+1] << 8) |
+ head[fileTypeInfo[i].versionOffset];
+ } else {
+ version = (head[fileTypeInfo[i].versionOffset] << 24) |
+ (head[fileTypeInfo[i].versionOffset+1] << 16) |
+ (head[fileTypeInfo[i].versionOffset+2] << 8) |
+ head[fileTypeInfo[i].versionOffset+3];
+ }
+ if (version != fileTypeInfo[i].versionNumber)
+ continue;
+ }
+
+ /* Optionally extract capacity from file */
+ if (fileTypeInfo[i].sizeOffset != -1) {
+ if (fileTypeInfo[i].endian == LV_LITTLE_ENDIAN) {
+ meta->capacity =
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+7] << 56) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+6] << 48) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+5] << 40) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+4] << 32) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+3] << 24) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+2] << 16) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+1] << 8) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset]);
+ } else {
+ meta->capacity =
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset] << 56) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+1] << 48) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+2] << 40) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+3] << 32) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+4] << 24) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+5] << 16) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+6] << 8) |
+ ((unsigned long long)head[fileTypeInfo[i].sizeOffset+7]);
+ }
+ /* Avoid unlikely, but theoretically possible overflow */
+ if (meta->capacity > (ULLONG_MAX / fileTypeInfo[i].sizeMultiplier))
+ continue;
+ meta->capacity *= fileTypeInfo[i].sizeMultiplier;
+ }
+
+ if (fileTypeInfo[i].qcowCryptOffset != -1) {
+ int crypt_format;
+
+ crypt_format = (head[fileTypeInfo[i].qcowCryptOffset] << 24) |
+ (head[fileTypeInfo[i].qcowCryptOffset+1] << 16) |
+ (head[fileTypeInfo[i].qcowCryptOffset+2] << 8) |
+ head[fileTypeInfo[i].qcowCryptOffset+3];
+ meta->encrypted = crypt_format != 0;
+ }
+
+ /* Validation passed, we know the file format now */
+ meta->format = fileTypeInfo[i].type;
+ if (fileTypeInfo[i].getBackingStore != NULL) {
+ char *base;
+
+ switch (fileTypeInfo[i].getBackingStore(conn, &base, head, len)) {
+ case BACKING_STORE_OK:
+ break;
+
+ case BACKING_STORE_INVALID:
+ continue;
+
+ case BACKING_STORE_ERROR:
+ return -1;
+ }
+ if (base != NULL) {
+ meta->backingStore = absolutePathFromBaseFile(path, base);
+ VIR_FREE(base);
+ if (meta->backingStore == NULL) {
+ virReportOOMError(conn);
+ return -1;
+ }
+ }
+ }
+ return 0;
+ }
+
+ /* No magic, so check file extension */
+ for (i = 0 ; i < ARRAY_CARDINALITY(fileTypeInfo) ; i++) {
+ if (fileTypeInfo[i].extension == NULL)
+ continue;
+
+ if (!virFileHasSuffix(path, fileTypeInfo[i].extension))
+ continue;
+
+ meta->format = fileTypeInfo[i].type;
+ return 0;
+ }
+
+ return 0;
+}
+
+int
+virStorageFileGetMetadata(virConnectPtr conn,
+ const char *path,
+ virStorageFileMetadata *meta)
+{
+ int fd, ret;
+
+ if ((fd = open(path, O_RDONLY)) < 0) {
+ virReportSystemError(conn, errno, _("cannot open file '%s'"), path);
+ return -1;
+ }
+
+ ret = virStorageFileGetMetadataFromFD(conn, path, fd, meta);
+
+ close(fd);
+
+ return ret;
+}
diff --git a/src/storage_file.h b/src/storage_file.h
new file mode 100644
index 0000000..b0abcaf
--- /dev/null
+++ b/src/storage_file.h
@@ -0,0 +1,62 @@
+/*
+ * storage_file.c: file utility functions for FS storage backend
+ *
+ * Copyright (C) 2007-2009 Red Hat, Inc.
+ * Copyright (C) 2007-2008 Daniel P. Berrange
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Daniel P. Berrange <berrange@redhat.com>
+ */
+
+#ifndef __VIR_STORAGE_FILE_H__
+#define __VIR_STORAGE_FILE_H__
+
+#include "util.h"
+#include <stdbool.h>
+
+enum virStorageFileFormat {
+ VIR_STORAGE_FILE_RAW = 0,
+ VIR_STORAGE_FILE_DIR,
+ VIR_STORAGE_FILE_BOCHS,
+ VIR_STORAGE_FILE_CLOOP,
+ VIR_STORAGE_FILE_COW,
+ VIR_STORAGE_FILE_DMG,
+ VIR_STORAGE_FILE_ISO,
+ VIR_STORAGE_FILE_QCOW,
+ VIR_STORAGE_FILE_QCOW2,
+ VIR_STORAGE_FILE_VMDK,
+ VIR_STORAGE_FILE_VPC,
+ VIR_STORAGE_FILE_LAST,
+};
+
+VIR_ENUM_DECL(virStorageFileFormat);
+
+typedef struct _virStorageFileMetadata {
+ int format;
+ char *backingStore;
+ unsigned long long capacity;
+ bool encrypted;
+} virStorageFileMetadata;
+
+int virStorageFileGetMetadata(virConnectPtr conn,
+ const char *path,
+ virStorageFileMetadata *meta);
+int virStorageFileGetMetadataFromFD(virConnectPtr conn,
+ const char *path,
+ int fd,
+ virStorageFileMetadata *meta);
+
+#endif /* __VIR_STORAGE_FILE_H__ */
diff --git a/src/util.h b/src/util.h
index f9715ab..75afecc 100644
--- a/src/util.h
+++ b/src/util.h
@@ -26,6 +26,7 @@
#define __VIR_UTIL_H__
#include "verify.h"
+#include "internal.h"
#include <sys/select.h>
#include <sys/types.h>
diff --git a/src/vbox/vbox_tmpl.c b/src/vbox/vbox_tmpl.c
index 7270710..783a216 100644
--- a/src/vbox/vbox_tmpl.c
+++ b/src/vbox/vbox_tmpl.c
@@ -45,6 +45,7 @@
#include "virterror_internal.h"
#include "domain_event.h"
#include "storage_conf.h"
+#include "storage_file.h"
#include "uuid.h"
#include "event.h"
#include "memory.h"
@@ -5980,14 +5981,14 @@ static virStorageVolPtr vboxStorageVolCreateXML(virStoragePoolPtr pool,
/* TODO: for now only the vmdk, vpc and vdi type harddisk
* variants can be created, also since there is no vdi
- * type in enum virStorageVolFormatFileSystem {} the default
+ * type in enum virStorageFileFormat {} the default
* will be to create vdi if nothing is specified in
* def->target.format
*/
- if (def->target.format == VIR_STORAGE_VOL_FILE_VMDK) {
+ if (def->target.format == VIR_STORAGE_FILE_VMDK) {
data->pFuncs->pfnUtf8ToUtf16("VMDK", &hddFormatUtf16);
- } else if (def->target.format == VIR_STORAGE_VOL_FILE_VPC) {
+ } else if (def->target.format == VIR_STORAGE_FILE_VPC) {
data->pFuncs->pfnUtf8ToUtf16("VHD", &hddFormatUtf16);
} else {
data->pFuncs->pfnUtf8ToUtf16("VDI", &hddFormatUtf16);
@@ -6302,13 +6303,13 @@ static char *vboxStorageVolGetXMLDesc(virStorageVolPtr vol, unsigned int flags A
DEBUG("Storage Volume Format: %s", hddFormatUtf8);
if (STRCASEEQ("vmdk", hddFormatUtf8))
- def.target.format = VIR_STORAGE_VOL_FILE_VMDK;
+ def.target.format = VIR_STORAGE_FILE_VMDK;
else if (STRCASEEQ("vhd", hddFormatUtf8))
- def.target.format = VIR_STORAGE_VOL_FILE_VPC;
+ def.target.format = VIR_STORAGE_FILE_VPC;
else
- def.target.format = VIR_STORAGE_VOL_FILE_RAW;
+ def.target.format = VIR_STORAGE_FILE_RAW;
- /* TODO: need to add vdi to enum virStorageVolFormatFileSystem {}
+ /* TODO: need to add vdi to enum virStorageFileFormat {}
* and then add it here
*/
--
1.6.2.5
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