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tools: qemu: Add patches to support adapter_type and monolithicFlat 

Its way more trouble to update this to a newer version of qemu than it
is to backport the two additional features we need.

Signed-off-by: Brett Mastbergen <bmastbergen@untangle.com>
master
Brett Mastbergen 2019-10-02 10:28:16 -04:00 committed by Hauke Mehrtens
parent dc34c695c4
commit 9e2e48ff31
12 changed files with 2340 additions and 0 deletions
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75
tools/qemu/patches/0001-vmdk-fix-endianness-bugs.patch Normal file
View File

@ -0,0 +1,75 @@
From 6afca0fc5430db0300fe53f2b9cd7d071a3925bb Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Wed, 25 May 2011 00:46:55 +0200
Subject: [PATCH 01/12] vmdk: fix endianness bugs
The vmdk code is sloppy when handling the header descriptor during
creation of an image. Fix all header accesses in the create path to
either store native endianness or convert it when appropriate.
Reported-by: Yury Tsarev <ytsarev@novell.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -716,11 +716,11 @@ static int vmdk_create(const char *filen
return -errno;
magic = cpu_to_be32(VMDK4_MAGIC);
memset(&header, 0, sizeof(header));
- header.version = cpu_to_le32(1);
- header.flags = cpu_to_le32(3); /* ?? */
- header.capacity = cpu_to_le64(total_size);
- header.granularity = cpu_to_le64(128);
- header.num_gtes_per_gte = cpu_to_le32(512);
+ header.version = 1;
+ header.flags = 3; /* ?? */
+ header.capacity = total_size;
+ header.granularity = 128;
+ header.num_gtes_per_gte = 512;
grains = (total_size + header.granularity - 1) / header.granularity;
gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9;
@@ -736,6 +736,12 @@ static int vmdk_create(const char *filen
header.granularity - 1) / header.granularity) *
header.granularity;
+ /* swap endianness for all header fields */
+ header.version = cpu_to_le32(header.version);
+ header.flags = cpu_to_le32(header.flags);
+ header.capacity = cpu_to_le64(header.capacity);
+ header.granularity = cpu_to_le64(header.granularity);
+ header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte);
header.desc_offset = cpu_to_le64(header.desc_offset);
header.desc_size = cpu_to_le64(header.desc_size);
header.rgd_offset = cpu_to_le64(header.rgd_offset);
@@ -759,7 +765,7 @@ static int vmdk_create(const char *filen
goto exit;
}
- ret = ftruncate(fd, header.grain_offset << 9);
+ ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9);
if (ret < 0) {
ret = -errno;
goto exit;
@@ -767,7 +773,7 @@ static int vmdk_create(const char *filen
/* write grain directory */
lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET);
- for (i = 0, tmp = header.rgd_offset + gd_size;
+ for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size;
i < gt_count; i++, tmp += gt_size) {
ret = qemu_write_full(fd, &tmp, sizeof(tmp));
if (ret != sizeof(tmp)) {
@@ -778,7 +784,7 @@ static int vmdk_create(const char *filen
/* write backup grain directory */
lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET);
- for (i = 0, tmp = header.gd_offset + gd_size;
+ for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size;
i < gt_count; i++, tmp += gt_size) {
ret = qemu_write_full(fd, &tmp, sizeof(tmp));
if (ret != sizeof(tmp)) {

557
tools/qemu/patches/0002-VMDK-introduce-VmdkExtent.patch Normal file
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@ -0,0 +1,557 @@
From fcd9c52d160376184cbd25e04586aa6eef6abd61 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 12 Jul 2011 19:56:28 +0800
Subject: [PATCH 02/12] VMDK: introduce VmdkExtent
Introduced VmdkExtent array into BDRVVmdkState, enable holding multiple
image extents for multiple file image support.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 348 +++++++++++++++++++++++++++++++++++++++++------------------
1 file changed, 246 insertions(+), 102 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -60,7 +60,11 @@ typedef struct {
#define L2_CACHE_SIZE 16
-typedef struct BDRVVmdkState {
+typedef struct VmdkExtent {
+ BlockDriverState *file;
+ bool flat;
+ int64_t sectors;
+ int64_t end_sector;
int64_t l1_table_offset;
int64_t l1_backup_table_offset;
uint32_t *l1_table;
@@ -74,7 +78,13 @@ typedef struct BDRVVmdkState {
uint32_t l2_cache_counts[L2_CACHE_SIZE];
unsigned int cluster_sectors;
+} VmdkExtent;
+
+typedef struct BDRVVmdkState {
uint32_t parent_cid;
+ int num_extents;
+ /* Extent array with num_extents entries, ascend ordered by address */
+ VmdkExtent *extents;
} BDRVVmdkState;
typedef struct VmdkMetaData {
@@ -105,6 +115,19 @@ static int vmdk_probe(const uint8_t *buf
#define DESC_SIZE 20*SECTOR_SIZE // 20 sectors of 512 bytes each
#define HEADER_SIZE 512 // first sector of 512 bytes
+static void vmdk_free_extents(BlockDriverState *bs)
+{
+ int i;
+ BDRVVmdkState *s = bs->opaque;
+
+ for (i = 0; i < s->num_extents; i++) {
+ qemu_free(s->extents[i].l1_table);
+ qemu_free(s->extents[i].l2_cache);
+ qemu_free(s->extents[i].l1_backup_table);
+ }
+ qemu_free(s->extents);
+}
+
static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
{
char desc[DESC_SIZE];
@@ -358,11 +381,50 @@ static int vmdk_parent_open(BlockDriverS
return 0;
}
+/* Create and append extent to the extent array. Return the added VmdkExtent
+ * address. return NULL if allocation failed. */
+static VmdkExtent *vmdk_add_extent(BlockDriverState *bs,
+ BlockDriverState *file, bool flat, int64_t sectors,
+ int64_t l1_offset, int64_t l1_backup_offset,
+ uint32_t l1_size,
+ int l2_size, unsigned int cluster_sectors)
+{
+ VmdkExtent *extent;
+ BDRVVmdkState *s = bs->opaque;
+
+ s->extents = qemu_realloc(s->extents,
+ (s->num_extents + 1) * sizeof(VmdkExtent));
+ extent = &s->extents[s->num_extents];
+ s->num_extents++;
+
+ memset(extent, 0, sizeof(VmdkExtent));
+ extent->file = file;
+ extent->flat = flat;
+ extent->sectors = sectors;
+ extent->l1_table_offset = l1_offset;
+ extent->l1_backup_table_offset = l1_backup_offset;
+ extent->l1_size = l1_size;
+ extent->l1_entry_sectors = l2_size * cluster_sectors;
+ extent->l2_size = l2_size;
+ extent->cluster_sectors = cluster_sectors;
+
+ if (s->num_extents > 1) {
+ extent->end_sector = (*(extent - 1)).end_sector + extent->sectors;
+ } else {
+ extent->end_sector = extent->sectors;
+ }
+ bs->total_sectors = extent->end_sector;
+ return extent;
+}
+
+
static int vmdk_open(BlockDriverState *bs, int flags)
{
BDRVVmdkState *s = bs->opaque;
uint32_t magic;
- int l1_size, i;
+ int i;
+ uint32_t l1_size, l1_entry_sectors;
+ VmdkExtent *extent = NULL;
if (bdrv_pread(bs->file, 0, &magic, sizeof(magic)) != sizeof(magic))
goto fail;
@@ -370,32 +432,34 @@ static int vmdk_open(BlockDriverState *b
magic = be32_to_cpu(magic);
if (magic == VMDK3_MAGIC) {
VMDK3Header header;
-
- if (bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)) != sizeof(header))
+ if (bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header))
+ != sizeof(header)) {
goto fail;
- s->cluster_sectors = le32_to_cpu(header.granularity);
- s->l2_size = 1 << 9;
- s->l1_size = 1 << 6;
- bs->total_sectors = le32_to_cpu(header.disk_sectors);
- s->l1_table_offset = le32_to_cpu(header.l1dir_offset) << 9;
- s->l1_backup_table_offset = 0;
- s->l1_entry_sectors = s->l2_size * s->cluster_sectors;
+ }
+ extent = vmdk_add_extent(bs, bs->file, false,
+ le32_to_cpu(header.disk_sectors),
+ le32_to_cpu(header.l1dir_offset) << 9, 0,
+ 1 << 6, 1 << 9, le32_to_cpu(header.granularity));
} else if (magic == VMDK4_MAGIC) {
VMDK4Header header;
-
- if (bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)) != sizeof(header))
+ if (bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header))
+ != sizeof(header)) {
goto fail;
- bs->total_sectors = le64_to_cpu(header.capacity);
- s->cluster_sectors = le64_to_cpu(header.granularity);
- s->l2_size = le32_to_cpu(header.num_gtes_per_gte);
- s->l1_entry_sectors = s->l2_size * s->cluster_sectors;
- if (s->l1_entry_sectors <= 0)
+ }
+ l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte)
+ * le64_to_cpu(header.granularity);
+ l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
+ / l1_entry_sectors;
+ extent = vmdk_add_extent(bs, bs->file, false,
+ le64_to_cpu(header.capacity),
+ le64_to_cpu(header.gd_offset) << 9,
+ le64_to_cpu(header.rgd_offset) << 9,
+ l1_size,
+ le32_to_cpu(header.num_gtes_per_gte),
+ le64_to_cpu(header.granularity));
+ if (extent->l1_entry_sectors <= 0) {
goto fail;
- s->l1_size = (bs->total_sectors + s->l1_entry_sectors - 1)
- / s->l1_entry_sectors;
- s->l1_table_offset = le64_to_cpu(header.rgd_offset) << 9;
- s->l1_backup_table_offset = le64_to_cpu(header.gd_offset) << 9;
-
+ }
// try to open parent images, if exist
if (vmdk_parent_open(bs) != 0)
goto fail;
@@ -406,40 +470,49 @@ static int vmdk_open(BlockDriverState *b
}
/* read the L1 table */
- l1_size = s->l1_size * sizeof(uint32_t);
- s->l1_table = qemu_malloc(l1_size);
- if (bdrv_pread(bs->file, s->l1_table_offset, s->l1_table, l1_size) != l1_size)
- goto fail;
- for(i = 0; i < s->l1_size; i++) {
- le32_to_cpus(&s->l1_table[i]);
- }
-
- if (s->l1_backup_table_offset) {
- s->l1_backup_table = qemu_malloc(l1_size);
- if (bdrv_pread(bs->file, s->l1_backup_table_offset, s->l1_backup_table, l1_size) != l1_size)
+ l1_size = extent->l1_size * sizeof(uint32_t);
+ extent->l1_table = qemu_malloc(l1_size);
+ if (bdrv_pread(bs->file,
+ extent->l1_table_offset,
+ extent->l1_table,
+ l1_size)
+ != l1_size) {
+ goto fail;
+ }
+ for (i = 0; i < extent->l1_size; i++) {
+ le32_to_cpus(&extent->l1_table[i]);
+ }
+
+ if (extent->l1_backup_table_offset) {
+ extent->l1_backup_table = qemu_malloc(l1_size);
+ if (bdrv_pread(bs->file,
+ extent->l1_backup_table_offset,
+ extent->l1_backup_table,
+ l1_size)
+ != l1_size) {
goto fail;
- for(i = 0; i < s->l1_size; i++) {
- le32_to_cpus(&s->l1_backup_table[i]);
+ }
+ for (i = 0; i < extent->l1_size; i++) {
+ le32_to_cpus(&extent->l1_backup_table[i]);
}
}
- s->l2_cache = qemu_malloc(s->l2_size * L2_CACHE_SIZE * sizeof(uint32_t));
+ extent->l2_cache =
+ qemu_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t));
return 0;
fail:
- qemu_free(s->l1_backup_table);
- qemu_free(s->l1_table);
- qemu_free(s->l2_cache);
+ vmdk_free_extents(bs);
return -1;
}
-static uint64_t get_cluster_offset(BlockDriverState *bs, VmdkMetaData *m_data,
- uint64_t offset, int allocate);
-
-static int get_whole_cluster(BlockDriverState *bs, uint64_t cluster_offset,
- uint64_t offset, int allocate)
+static int get_whole_cluster(BlockDriverState *bs,
+ VmdkExtent *extent,
+ uint64_t cluster_offset,
+ uint64_t offset,
+ bool allocate)
{
- BDRVVmdkState *s = bs->opaque;
- uint8_t whole_grain[s->cluster_sectors*512]; // 128 sectors * 512 bytes each = grain size 64KB
+ /* 128 sectors * 512 bytes each = grain size 64KB */
+ uint8_t whole_grain[extent->cluster_sectors * 512];
// we will be here if it's first write on non-exist grain(cluster).
// try to read from parent image, if exist
@@ -450,14 +523,14 @@ static int get_whole_cluster(BlockDriver
return -1;
ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain,
- s->cluster_sectors);
+ extent->cluster_sectors);
if (ret < 0) {
return -1;
}
//Write grain only into the active image
- ret = bdrv_write(bs->file, cluster_offset, whole_grain,
- s->cluster_sectors);
+ ret = bdrv_write(extent->file, cluster_offset, whole_grain,
+ extent->cluster_sectors);
if (ret < 0) {
return -1;
}
@@ -465,29 +538,39 @@ static int get_whole_cluster(BlockDriver
return 0;
}
-static int vmdk_L2update(BlockDriverState *bs, VmdkMetaData *m_data)
+static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data)
{
- BDRVVmdkState *s = bs->opaque;
-
/* update L2 table */
- if (bdrv_pwrite_sync(bs->file, ((int64_t)m_data->l2_offset * 512) + (m_data->l2_index * sizeof(m_data->offset)),
- &(m_data->offset), sizeof(m_data->offset)) < 0)
+ if (bdrv_pwrite_sync(
+ extent->file,
+ ((int64_t)m_data->l2_offset * 512)
+ + (m_data->l2_index * sizeof(m_data->offset)),
+ &(m_data->offset),
+ sizeof(m_data->offset)
+ ) < 0) {
return -1;
+ }
/* update backup L2 table */
- if (s->l1_backup_table_offset != 0) {
- m_data->l2_offset = s->l1_backup_table[m_data->l1_index];
- if (bdrv_pwrite_sync(bs->file, ((int64_t)m_data->l2_offset * 512) + (m_data->l2_index * sizeof(m_data->offset)),
- &(m_data->offset), sizeof(m_data->offset)) < 0)
+ if (extent->l1_backup_table_offset != 0) {
+ m_data->l2_offset = extent->l1_backup_table[m_data->l1_index];
+ if (bdrv_pwrite_sync(
+ extent->file,
+ ((int64_t)m_data->l2_offset * 512)
+ + (m_data->l2_index * sizeof(m_data->offset)),
+ &(m_data->offset), sizeof(m_data->offset)
+ ) < 0) {
return -1;
+ }
}
return 0;
}
-static uint64_t get_cluster_offset(BlockDriverState *bs, VmdkMetaData *m_data,
- uint64_t offset, int allocate)
+static uint64_t get_cluster_offset(BlockDriverState *bs,
+ VmdkExtent *extent,
+ VmdkMetaData *m_data,
+ uint64_t offset, int allocate)
{
- BDRVVmdkState *s = bs->opaque;
unsigned int l1_index, l2_offset, l2_index;
int min_index, i, j;
uint32_t min_count, *l2_table, tmp = 0;
@@ -496,21 +579,23 @@ static uint64_t get_cluster_offset(Block
if (m_data)
m_data->valid = 0;
- l1_index = (offset >> 9) / s->l1_entry_sectors;
- if (l1_index >= s->l1_size)
+ l1_index = (offset >> 9) / extent->l1_entry_sectors;
+ if (l1_index >= extent->l1_size) {
return 0;
- l2_offset = s->l1_table[l1_index];
- if (!l2_offset)
+ }
+ l2_offset = extent->l1_table[l1_index];
+ if (!l2_offset) {
return 0;
+ }
for(i = 0; i < L2_CACHE_SIZE; i++) {
- if (l2_offset == s->l2_cache_offsets[i]) {
+ if (l2_offset == extent->l2_cache_offsets[i]) {
/* increment the hit count */
- if (++s->l2_cache_counts[i] == 0xffffffff) {
+ if (++extent->l2_cache_counts[i] == 0xffffffff) {
for(j = 0; j < L2_CACHE_SIZE; j++) {
- s->l2_cache_counts[j] >>= 1;
+ extent->l2_cache_counts[j] >>= 1;
}
}
- l2_table = s->l2_cache + (i * s->l2_size);
+ l2_table = extent->l2_cache + (i * extent->l2_size);
goto found;
}
}
@@ -518,20 +603,25 @@ static uint64_t get_cluster_offset(Block
min_index = 0;
min_count = 0xffffffff;
for(i = 0; i < L2_CACHE_SIZE; i++) {
- if (s->l2_cache_counts[i] < min_count) {
- min_count = s->l2_cache_counts[i];
+ if (extent->l2_cache_counts[i] < min_count) {
+ min_count = extent->l2_cache_counts[i];
min_index = i;
}
}
- l2_table = s->l2_cache + (min_index * s->l2_size);
- if (bdrv_pread(bs->file, (int64_t)l2_offset * 512, l2_table, s->l2_size * sizeof(uint32_t)) !=
- s->l2_size * sizeof(uint32_t))
+ l2_table = extent->l2_cache + (min_index * extent->l2_size);
+ if (bdrv_pread(
+ extent->file,
+ (int64_t)l2_offset * 512,
+ l2_table,
+ extent->l2_size * sizeof(uint32_t)
+ ) != extent->l2_size * sizeof(uint32_t)) {
return 0;
+ }
- s->l2_cache_offsets[min_index] = l2_offset;
- s->l2_cache_counts[min_index] = 1;
+ extent->l2_cache_offsets[min_index] = l2_offset;
+ extent->l2_cache_counts[min_index] = 1;
found:
- l2_index = ((offset >> 9) / s->cluster_sectors) % s->l2_size;
+ l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size;
cluster_offset = le32_to_cpu(l2_table[l2_index]);
if (!cluster_offset) {
@@ -539,8 +629,11 @@ static uint64_t get_cluster_offset(Block
return 0;
// Avoid the L2 tables update for the images that have snapshots.
- cluster_offset = bdrv_getlength(bs->file);
- bdrv_truncate(bs->file, cluster_offset + (s->cluster_sectors << 9));
+ cluster_offset = bdrv_getlength(extent->file);
+ bdrv_truncate(
+ extent->file,
+ cluster_offset + (extent->cluster_sectors << 9)
+ );
cluster_offset >>= 9;
tmp = cpu_to_le32(cluster_offset);
@@ -551,7 +644,8 @@ static uint64_t get_cluster_offset(Block
* This problem may occur because of insufficient space on host disk
* or inappropriate VM shutdown.
*/
- if (get_whole_cluster(bs, cluster_offset, offset, allocate) == -1)
+ if (get_whole_cluster(
+ bs, extent, cluster_offset, offset, allocate) == -1)
return 0;
if (m_data) {
@@ -566,33 +660,69 @@ static uint64_t get_cluster_offset(Block
return cluster_offset;
}
+static VmdkExtent *find_extent(BDRVVmdkState *s,
+ int64_t sector_num, VmdkExtent *start_hint)
+{
+ VmdkExtent *extent = start_hint;
+
+ if (!extent) {
+ extent = &s->extents[0];
+ }
+ while (extent < &s->extents[s->num_extents]) {
+ if (sector_num < extent->end_sector) {
+ return extent;
+ }
+ extent++;
+ }
+ return NULL;
+}
+
static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, int *pnum)
{
BDRVVmdkState *s = bs->opaque;
- int index_in_cluster, n;
- uint64_t cluster_offset;
- cluster_offset = get_cluster_offset(bs, NULL, sector_num << 9, 0);
- index_in_cluster = sector_num % s->cluster_sectors;
- n = s->cluster_sectors - index_in_cluster;
+ int64_t index_in_cluster, n, ret;
+ uint64_t offset;
+ VmdkExtent *extent;
+
+ extent = find_extent(s, sector_num, NULL);
+ if (!extent) {
+ return 0;
+ }
+ if (extent->flat) {
+ n = extent->end_sector - sector_num;
+ ret = 1;
+ } else {
+ offset = get_cluster_offset(bs, extent, NULL, sector_num * 512, 0);
+ index_in_cluster = sector_num % extent->cluster_sectors;
+ n = extent->cluster_sectors - index_in_cluster;
+ ret = offset ? 1 : 0;
+ }
if (n > nb_sectors)
n = nb_sectors;
*pnum = n;
- return (cluster_offset != 0);
+ return ret;
}
static int vmdk_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
BDRVVmdkState *s = bs->opaque;
- int index_in_cluster, n, ret;
+ int ret;
+ uint64_t n, index_in_cluster;
+ VmdkExtent *extent = NULL;
uint64_t cluster_offset;
while (nb_sectors > 0) {
- cluster_offset = get_cluster_offset(bs, NULL, sector_num << 9, 0);
- index_in_cluster = sector_num % s->cluster_sectors;
- n = s->cluster_sectors - index_in_cluster;
+ extent = find_extent(s, sector_num, extent);
+ if (!extent) {
+ return -EIO;
+ }
+ cluster_offset = get_cluster_offset(
+ bs, extent, NULL, sector_num << 9, 0);
+ index_in_cluster = sector_num % extent->cluster_sectors;
+ n = extent->cluster_sectors - index_in_cluster;
if (n > nb_sectors)
n = nb_sectors;
if (!cluster_offset) {
@@ -621,10 +751,12 @@ static int vmdk_write(BlockDriverState *
const uint8_t *buf, int nb_sectors)
{
BDRVVmdkState *s = bs->opaque;
- VmdkMetaData m_data;
- int index_in_cluster, n;
+ VmdkExtent *extent = NULL;
+ int n;
+ int64_t index_in_cluster;
uint64_t cluster_offset;
static int cid_update = 0;
+ VmdkMetaData m_data;
if (sector_num > bs->total_sectors) {
fprintf(stderr,
@@ -635,20 +767,35 @@ static int vmdk_write(BlockDriverState *
}
while (nb_sectors > 0) {
- index_in_cluster = sector_num & (s->cluster_sectors - 1);
- n = s->cluster_sectors - index_in_cluster;
- if (n > nb_sectors)
- n = nb_sectors;
- cluster_offset = get_cluster_offset(bs, &m_data, sector_num << 9, 1);
- if (!cluster_offset)
+ extent = find_extent(s, sector_num, extent);
+ if (!extent) {
+ return -EIO;
+ }
+ cluster_offset = get_cluster_offset(
+ bs,
+ extent,
+ &m_data,
+ sector_num << 9, 1);
+ if (!cluster_offset) {
return -1;
+ }
+ index_in_cluster = sector_num % extent->cluster_sectors;
+ n = extent->cluster_sectors - index_in_cluster;
+ if (n > nb_sectors) {
+ n = nb_sectors;
+ }
- if (bdrv_pwrite(bs->file, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512)
+ if (bdrv_pwrite(bs->file,
+ cluster_offset + index_in_cluster * 512,
+ buf, n * 512)
+ != n * 512) {
return -1;
+ }
if (m_data.valid) {
/* update L2 tables */
- if (vmdk_L2update(bs, &m_data) == -1)
+ if (vmdk_L2update(extent, &m_data) == -1) {
return -1;
+ }
}
nb_sectors -= n;
sector_num += n;
@@ -822,10 +969,7 @@ exit:
static void vmdk_close(BlockDriverState *bs)
{
- BDRVVmdkState *s = bs->opaque;
-
- qemu_free(s->l1_table);
- qemu_free(s->l2_cache);
+ vmdk_free_extents(bs);
}
static int vmdk_flush(BlockDriverState *bs)

46
tools/qemu/patches/0003-VMDK-bugfix-align-offset-to-cluster-in-get_whole_clu.patch Normal file
View File

@ -0,0 +1,46 @@
From 66922efc83a670178b208dec2f5123ec85fb6ba3 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 12 Jul 2011 19:56:29 +0800
Subject: [PATCH 03/12] VMDK: bugfix, align offset to cluster in
get_whole_cluster
In get_whole_cluster, the offset is not aligned to cluster when reading
from backing_hd. When the first write to child is not at the cluster
boundary, wrong address data from parent is copied to child.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -514,21 +514,23 @@ static int get_whole_cluster(BlockDriver
/* 128 sectors * 512 bytes each = grain size 64KB */
uint8_t whole_grain[extent->cluster_sectors * 512];
- // we will be here if it's first write on non-exist grain(cluster).
- // try to read from parent image, if exist
+ /* we will be here if it's first write on non-exist grain(cluster).
+ * try to read from parent image, if exist */
if (bs->backing_hd) {
int ret;
if (!vmdk_is_cid_valid(bs))
return -1;
+ /* floor offset to cluster */
+ offset -= offset % (extent->cluster_sectors * 512);
ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain,
extent->cluster_sectors);
if (ret < 0) {
return -1;
}
- //Write grain only into the active image
+ /* Write grain only into the active image */
ret = bdrv_write(extent->file, cluster_offset, whole_grain,
extent->cluster_sectors);
if (ret < 0) {

74
tools/qemu/patches/0004-VMDK-probe-for-monolithicFlat-images.patch Normal file
View File

@ -0,0 +1,74 @@
From 930e57ecb64bbab75c2b71d0d1ba07451fec4567 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 12 Jul 2011 19:56:30 +0800
Subject: [PATCH 04/12] VMDK: probe for monolithicFlat images
Probe as the same behavior as VMware does.
Recognize image as monolithicFlat descriptor file when the file is text
and the first effective line (not '#' leaded comment or space line) is
either 'version=1' or 'version=2'. No space or upper case charactors
accepted.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 45 +++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 43 insertions(+), 2 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -103,10 +103,51 @@ static int vmdk_probe(const uint8_t *buf
return 0;
magic = be32_to_cpu(*(uint32_t *)buf);
if (magic == VMDK3_MAGIC ||
- magic == VMDK4_MAGIC)
+ magic == VMDK4_MAGIC) {
return 100;
- else
+ } else {
+ const char *p = (const char *)buf;
+ const char *end = p + buf_size;
+ while (p < end) {
+ if (*p == '#') {
+ /* skip comment line */
+ while (p < end && *p != '\n') {
+ p++;
+ }
+ p++;
+ continue;
+ }
+ if (*p == ' ') {
+ while (p < end && *p == ' ') {
+ p++;
+ }
+ /* skip '\r' if windows line endings used. */
+ if (p < end && *p == '\r') {
+ p++;
+ }
+ /* only accept blank lines before 'version=' line */
+ if (p == end || *p != '\n') {
+ return 0;
+ }
+ p++;
+ continue;
+ }
+ if (end - p >= strlen("version=X\n")) {
+ if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 ||
+ strncmp("version=2\n", p, strlen("version=2\n")) == 0) {
+ return 100;
+ }
+ }
+ if (end - p >= strlen("version=X\r\n")) {
+ if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 ||
+ strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) {
+ return 100;
+ }
+ }
+ return 0;
+ }
return 0;
+ }
}
#define CHECK_CID 1

241
tools/qemu/patches/0005-VMDK-separate-vmdk_open-by-format-version.patch Normal file
View File

@ -0,0 +1,241 @@
From 97cf5df76657bab81d6b8669607f6f13215201c1 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 12 Jul 2011 19:56:31 +0800
Subject: [PATCH 05/12] VMDK: separate vmdk_open by format version
Separate vmdk_open by subformats to:
* vmdk_open_vmdk3
* vmdk_open_vmdk4
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 178 +++++++++++++++++++++++++++++++++++++----------------------
1 file changed, 112 insertions(+), 66 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -458,67 +458,20 @@ static VmdkExtent *vmdk_add_extent(Block
return extent;
}
-
-static int vmdk_open(BlockDriverState *bs, int flags)
+static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent)
{
- BDRVVmdkState *s = bs->opaque;
- uint32_t magic;
- int i;
- uint32_t l1_size, l1_entry_sectors;
- VmdkExtent *extent = NULL;
-
- if (bdrv_pread(bs->file, 0, &magic, sizeof(magic)) != sizeof(magic))
- goto fail;
-
- magic = be32_to_cpu(magic);
- if (magic == VMDK3_MAGIC) {
- VMDK3Header header;
- if (bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header))
- != sizeof(header)) {
- goto fail;
- }
- extent = vmdk_add_extent(bs, bs->file, false,
- le32_to_cpu(header.disk_sectors),
- le32_to_cpu(header.l1dir_offset) << 9, 0,
- 1 << 6, 1 << 9, le32_to_cpu(header.granularity));
- } else if (magic == VMDK4_MAGIC) {
- VMDK4Header header;
- if (bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header))
- != sizeof(header)) {
- goto fail;
- }
- l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte)
- * le64_to_cpu(header.granularity);
- l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
- / l1_entry_sectors;
- extent = vmdk_add_extent(bs, bs->file, false,
- le64_to_cpu(header.capacity),
- le64_to_cpu(header.gd_offset) << 9,
- le64_to_cpu(header.rgd_offset) << 9,
- l1_size,
- le32_to_cpu(header.num_gtes_per_gte),
- le64_to_cpu(header.granularity));
- if (extent->l1_entry_sectors <= 0) {
- goto fail;
- }
- // try to open parent images, if exist
- if (vmdk_parent_open(bs) != 0)
- goto fail;
- // write the CID once after the image creation
- s->parent_cid = vmdk_read_cid(bs,1);
- } else {
- goto fail;
- }
+ int ret;
+ int l1_size, i;
/* read the L1 table */
l1_size = extent->l1_size * sizeof(uint32_t);
extent->l1_table = qemu_malloc(l1_size);
- if (bdrv_pread(bs->file,
- extent->l1_table_offset,
- extent->l1_table,
- l1_size)
- != l1_size) {
- goto fail;
+ ret = bdrv_pread(extent->file,
+ extent->l1_table_offset,
+ extent->l1_table,
+ l1_size);
+ if (ret < 0) {
+ goto fail_l1;
}
for (i = 0; i < extent->l1_size; i++) {
le32_to_cpus(&extent->l1_table[i]);
@@ -526,12 +479,12 @@ static int vmdk_open(BlockDriverState *b
if (extent->l1_backup_table_offset) {
extent->l1_backup_table = qemu_malloc(l1_size);
- if (bdrv_pread(bs->file,
- extent->l1_backup_table_offset,
- extent->l1_backup_table,
- l1_size)
- != l1_size) {
- goto fail;
+ ret = bdrv_pread(extent->file,
+ extent->l1_backup_table_offset,
+ extent->l1_backup_table,
+ l1_size);
+ if (ret < 0) {
+ goto fail_l1b;
}
for (i = 0; i < extent->l1_size; i++) {
le32_to_cpus(&extent->l1_backup_table[i]);
@@ -541,9 +494,102 @@ static int vmdk_open(BlockDriverState *b
extent->l2_cache =
qemu_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t));
return 0;
+ fail_l1b:
+ qemu_free(extent->l1_backup_table);
+ fail_l1:
+ qemu_free(extent->l1_table);
+ return ret;
+}
+
+static int vmdk_open_vmdk3(BlockDriverState *bs, int flags)
+{
+ int ret;
+ uint32_t magic;
+ VMDK3Header header;
+ VmdkExtent *extent;
+
+ ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header));
+ if (ret < 0) {
+ goto fail;
+ }
+ extent = vmdk_add_extent(bs,
+ bs->file, false,
+ le32_to_cpu(header.disk_sectors),
+ le32_to_cpu(header.l1dir_offset) << 9,
+ 0, 1 << 6, 1 << 9,
+ le32_to_cpu(header.granularity));
+ ret = vmdk_init_tables(bs, extent);
+ if (ret) {
+ /* vmdk_init_tables cleans up on fail, so only free allocation of
+ * vmdk_add_extent here. */
+ goto fail;
+ }
+ return 0;
fail:
vmdk_free_extents(bs);
- return -1;
+ return ret;
+}
+
+static int vmdk_open_vmdk4(BlockDriverState *bs, int flags)
+{
+ int ret;
+ uint32_t magic;
+ uint32_t l1_size, l1_entry_sectors;
+ VMDK4Header header;
+ BDRVVmdkState *s = bs->opaque;
+ VmdkExtent *extent;
+
+ ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header));
+ if (ret < 0) {
+ goto fail;
+ }
+ l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte)
+ * le64_to_cpu(header.granularity);
+ l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
+ / l1_entry_sectors;
+ extent = vmdk_add_extent(bs, bs->file, false,
+ le64_to_cpu(header.capacity),
+ le64_to_cpu(header.gd_offset) << 9,
+ le64_to_cpu(header.rgd_offset) << 9,
+ l1_size,
+ le32_to_cpu(header.num_gtes_per_gte),
+ le64_to_cpu(header.granularity));
+ if (extent->l1_entry_sectors <= 0) {
+ ret = -EINVAL;
+ goto fail;
+ }
+ /* try to open parent images, if exist */
+ ret = vmdk_parent_open(bs);
+ if (ret) {
+ goto fail;
+ }
+ s->parent_cid = vmdk_read_cid(bs, 1);
+ ret = vmdk_init_tables(bs, extent);
+ if (ret) {
+ goto fail;
+ }
+ return 0;
+ fail:
+ vmdk_free_extents(bs);
+ return ret;
+}
+
+static int vmdk_open(BlockDriverState *bs, int flags)
+{
+ uint32_t magic;
+
+ if (bdrv_pread(bs->file, 0, &magic, sizeof(magic)) != sizeof(magic)) {
+ return -EIO;
+ }
+
+ magic = be32_to_cpu(magic);
+ if (magic == VMDK3_MAGIC) {
+ return vmdk_open_vmdk3(bs, flags);
+ } else if (magic == VMDK4_MAGIC) {
+ return vmdk_open_vmdk4(bs, flags);
+ } else {
+ return -EINVAL;
+ }
}
static int get_whole_cluster(BlockDriverState *bs,
@@ -630,11 +676,11 @@ static uint64_t get_cluster_offset(Block
if (!l2_offset) {
return 0;
}
- for(i = 0; i < L2_CACHE_SIZE; i++) {
+ for (i = 0; i < L2_CACHE_SIZE; i++) {
if (l2_offset == extent->l2_cache_offsets[i]) {
/* increment the hit count */
if (++extent->l2_cache_counts[i] == 0xffffffff) {
- for(j = 0; j < L2_CACHE_SIZE; j++) {
+ for (j = 0; j < L2_CACHE_SIZE; j++) {
extent->l2_cache_counts[j] >>= 1;
}
}
@@ -645,7 +691,7 @@ static uint64_t get_cluster_offset(Block
/* not found: load a new entry in the least used one */
min_index = 0;
min_count = 0xffffffff;
- for(i = 0; i < L2_CACHE_SIZE; i++) {
+ for (i = 0; i < L2_CACHE_SIZE; i++) {
if (extent->l2_cache_counts[i] < min_count) {
min_count = extent->l2_cache_counts[i];
min_index = i;

102
tools/qemu/patches/0006-VMDK-add-field-BDRVVmdkState.desc_offset.patch Normal file
View File

@ -0,0 +1,102 @@
From 1c1781fa1c45a7c012f7b2c4be1be372f19e3cc6 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 12 Jul 2011 19:56:32 +0800
Subject: [PATCH 06/12] VMDK: add field BDRVVmdkState.desc_offset
There are several occurrence of magic number 0x200 as the descriptor
offset within mono sparse image file. This is not the case for images
with separate descriptor file. So a field is added to BDRVVmdkState to
hold the correct value.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 27 ++++++++++++++++++---------
1 file changed, 18 insertions(+), 9 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -81,6 +81,7 @@ typedef struct VmdkExtent {
} VmdkExtent;
typedef struct BDRVVmdkState {
+ int desc_offset;
uint32_t parent_cid;
int num_extents;
/* Extent array with num_extents entries, ascend ordered by address */
@@ -175,10 +176,11 @@ static uint32_t vmdk_read_cid(BlockDrive
uint32_t cid;
const char *p_name, *cid_str;
size_t cid_str_size;
+ BDRVVmdkState *s = bs->opaque;
- /* the descriptor offset = 0x200 */
- if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE)
+ if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) {
return 0;
+ }
if (parent) {
cid_str = "parentCID";
@@ -200,10 +202,12 @@ static int vmdk_write_cid(BlockDriverSta
{
char desc[DESC_SIZE], tmp_desc[DESC_SIZE];
char *p_name, *tmp_str;
+ BDRVVmdkState *s = bs->opaque;
- /* the descriptor offset = 0x200 */
- if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE)
- return -1;
+ memset(desc, 0, sizeof(desc));
+ if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) {
+ return -EIO;
+ }
tmp_str = strstr(desc,"parentCID");
pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str);
@@ -213,8 +217,9 @@ static int vmdk_write_cid(BlockDriverSta
pstrcat(desc, sizeof(desc), tmp_desc);
}
- if (bdrv_pwrite_sync(bs->file, 0x200, desc, DESC_SIZE) < 0)
- return -1;
+ if (bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE) < 0) {
+ return -EIO;
+ }
return 0;
}
@@ -402,10 +407,11 @@ static int vmdk_parent_open(BlockDriverS
{
char *p_name;
char desc[DESC_SIZE];
+ BDRVVmdkState *s = bs->opaque;
- /* the descriptor offset = 0x200 */
- if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE)
+ if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) {
return -1;
+ }
if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) {
char *end_name;
@@ -506,8 +512,10 @@ static int vmdk_open_vmdk3(BlockDriverSt
int ret;
uint32_t magic;
VMDK3Header header;
+ BDRVVmdkState *s = bs->opaque;
VmdkExtent *extent;
+ s->desc_offset = 0x200;
ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
goto fail;
@@ -539,6 +547,7 @@ static int vmdk_open_vmdk4(BlockDriverSt
BDRVVmdkState *s = bs->opaque;
VmdkExtent *extent;
+ s->desc_offset = 0x200;
ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
goto fail;

35
tools/qemu/patches/0007-VMDK-flush-multiple-extents.patch Normal file
View File

@ -0,0 +1,35 @@
From 49885608e66c1e76a2b715fb36fd2f27f73e5202 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 12 Jul 2011 19:56:33 +0800
Subject: [PATCH 07/12] VMDK: flush multiple extents
Flush all the file that referenced by the image.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1072,7 +1072,17 @@ static void vmdk_close(BlockDriverState
static int vmdk_flush(BlockDriverState *bs)
{
- return bdrv_flush(bs->file);
+ int i, ret, err;
+ BDRVVmdkState *s = bs->opaque;
+
+ ret = bdrv_flush(bs->file);
+ for (i = 0; i < s->num_extents; i++) {
+ err = bdrv_flush(s->extents[i].file);
+ if (err < 0) {
+ ret = err;
+ }
+ }
+ return ret;
}

46
tools/qemu/patches/0008-VMDK-move-static-cid_update-flag-to-bs-field.patch Normal file
View File

@ -0,0 +1,46 @@
From 9d8117f00364c12cbd658de903b1ed26a30584e0 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 12 Jul 2011 19:56:34 +0800
Subject: [PATCH 08/12] VMDK: move 'static' cid_update flag to bs field
Cid_update is the flag for updating CID on first write after opening the
image. This should be per image open rather than per program life cycle,
so change it from static var of vmdk_write to a field in BDRVVmdkState.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -82,6 +82,7 @@ typedef struct VmdkExtent {
typedef struct BDRVVmdkState {
int desc_offset;
+ bool cid_updated;
uint32_t parent_cid;
int num_extents;
/* Extent array with num_extents entries, ascend ordered by address */
@@ -853,7 +854,6 @@ static int vmdk_write(BlockDriverState *
int n;
int64_t index_in_cluster;
uint64_t cluster_offset;
- static int cid_update = 0;
VmdkMetaData m_data;
if (sector_num > bs->total_sectors) {
@@ -900,9 +900,9 @@ static int vmdk_write(BlockDriverState *
buf += n * 512;
// update CID on the first write every time the virtual disk is opened
- if (!cid_update) {
+ if (!s->cid_updated) {
vmdk_write_cid(bs, time(NULL));
- cid_update++;
+ s->cid_updated = true;
}
}
return 0;

198
tools/qemu/patches/0009-VMDK-change-get_cluster_offset-return-type.patch Normal file
View File

@ -0,0 +1,198 @@
From 9e1ddc6967e8739f4fa47fa4f6a767ebe319f6ff Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 12 Jul 2011 19:56:35 +0800
Subject: [PATCH 09/12] VMDK: change get_cluster_offset return type
The return type of get_cluster_offset was an offset that use 0 to denote
'not allocated', this will be no longer true for flat extents, as we see
flat extent file as a single huge cluster whose offset is 0 and length
is the whole file length.
So now we use int return value, 0 means success and otherwise offset
invalid.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 79 ++++++++++++++++++++++++++++++++----------------------------
1 file changed, 42 insertions(+), 37 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -665,26 +665,31 @@ static int vmdk_L2update(VmdkExtent *ext
return 0;
}
-static uint64_t get_cluster_offset(BlockDriverState *bs,
+static int get_cluster_offset(BlockDriverState *bs,
VmdkExtent *extent,
VmdkMetaData *m_data,
- uint64_t offset, int allocate)
+ uint64_t offset,
+ int allocate,
+ uint64_t *cluster_offset)
{
unsigned int l1_index, l2_offset, l2_index;
int min_index, i, j;
uint32_t min_count, *l2_table, tmp = 0;
- uint64_t cluster_offset;
if (m_data)
m_data->valid = 0;
+ if (extent->flat) {
+ *cluster_offset = 0;
+ return 0;
+ }
l1_index = (offset >> 9) / extent->l1_entry_sectors;
if (l1_index >= extent->l1_size) {
- return 0;
+ return -1;
}
l2_offset = extent->l1_table[l1_index];
if (!l2_offset) {
- return 0;
+ return -1;
}
for (i = 0; i < L2_CACHE_SIZE; i++) {
if (l2_offset == extent->l2_cache_offsets[i]) {
@@ -714,28 +719,29 @@ static uint64_t get_cluster_offset(Block
l2_table,
extent->l2_size * sizeof(uint32_t)
) != extent->l2_size * sizeof(uint32_t)) {
- return 0;
+ return -1;
}
extent->l2_cache_offsets[min_index] = l2_offset;
extent->l2_cache_counts[min_index] = 1;
found:
l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size;
- cluster_offset = le32_to_cpu(l2_table[l2_index]);
+ *cluster_offset = le32_to_cpu(l2_table[l2_index]);
- if (!cluster_offset) {
- if (!allocate)
- return 0;
+ if (!*cluster_offset) {
+ if (!allocate) {
+ return -1;
+ }
// Avoid the L2 tables update for the images that have snapshots.
- cluster_offset = bdrv_getlength(extent->file);
+ *cluster_offset = bdrv_getlength(extent->file);
bdrv_truncate(
extent->file,
- cluster_offset + (extent->cluster_sectors << 9)
+ *cluster_offset + (extent->cluster_sectors << 9)
);
- cluster_offset >>= 9;
- tmp = cpu_to_le32(cluster_offset);
+ *cluster_offset >>= 9;
+ tmp = cpu_to_le32(*cluster_offset);
l2_table[l2_index] = tmp;
/* First of all we write grain itself, to avoid race condition
@@ -744,8 +750,8 @@ static uint64_t get_cluster_offset(Block
* or inappropriate VM shutdown.
*/
if (get_whole_cluster(
- bs, extent, cluster_offset, offset, allocate) == -1)
- return 0;
+ bs, extent, *cluster_offset, offset, allocate) == -1)
+ return -1;
if (m_data) {
m_data->offset = tmp;
@@ -755,8 +761,8 @@ static uint64_t get_cluster_offset(Block
m_data->valid = 1;
}
}
- cluster_offset <<= 9;
- return cluster_offset;
+ *cluster_offset <<= 9;
+ return 0;
}
static VmdkExtent *find_extent(BDRVVmdkState *s,
@@ -780,7 +786,6 @@ static int vmdk_is_allocated(BlockDriver
int nb_sectors, int *pnum)
{
BDRVVmdkState *s = bs->opaque;
-
int64_t index_in_cluster, n, ret;
uint64_t offset;
VmdkExtent *extent;
@@ -789,15 +794,13 @@ static int vmdk_is_allocated(BlockDriver
if (!extent) {
return 0;
}
- if (extent->flat) {
- n = extent->end_sector - sector_num;
- ret = 1;
- } else {
- offset = get_cluster_offset(bs, extent, NULL, sector_num * 512, 0);
- index_in_cluster = sector_num % extent->cluster_sectors;
- n = extent->cluster_sectors - index_in_cluster;
- ret = offset ? 1 : 0;
- }
+ ret = get_cluster_offset(bs, extent, NULL,
+ sector_num * 512, 0, &offset);
+ /* get_cluster_offset returning 0 means success */
+ ret = !ret;
+
+ index_in_cluster = sector_num % extent->cluster_sectors;
+ n = extent->cluster_sectors - index_in_cluster;
if (n > nb_sectors)
n = nb_sectors;
*pnum = n;
@@ -818,14 +821,15 @@ static int vmdk_read(BlockDriverState *b
if (!extent) {
return -EIO;
}
- cluster_offset = get_cluster_offset(
- bs, extent, NULL, sector_num << 9, 0);
+ ret = get_cluster_offset(
+ bs, extent, NULL,
+ sector_num << 9, 0, &cluster_offset);
index_in_cluster = sector_num % extent->cluster_sectors;
n = extent->cluster_sectors - index_in_cluster;
if (n > nb_sectors)
n = nb_sectors;
- if (!cluster_offset) {
- // try to read from parent image, if exist
+ if (ret) {
+ /* if not allocated, try to read from parent image, if exist */
if (bs->backing_hd) {
if (!vmdk_is_cid_valid(bs))
return -1;
@@ -851,7 +855,7 @@ static int vmdk_write(BlockDriverState *
{
BDRVVmdkState *s = bs->opaque;
VmdkExtent *extent = NULL;
- int n;
+ int n, ret;
int64_t index_in_cluster;
uint64_t cluster_offset;
VmdkMetaData m_data;
@@ -869,13 +873,14 @@ static int vmdk_write(BlockDriverState *
if (!extent) {
return -EIO;
}
- cluster_offset = get_cluster_offset(
+ ret = get_cluster_offset(
bs,
extent,
&m_data,
- sector_num << 9, 1);
- if (!cluster_offset) {
- return -1;
+ sector_num << 9, 1,
+ &cluster_offset);
+ if (ret) {
+ return -EINVAL;
}
index_in_cluster = sector_num % extent->cluster_sectors;
n = extent->cluster_sectors - index_in_cluster;

257
tools/qemu/patches/0010-VMDK-open-read-write-for-monolithicFlat-image.patch Normal file
View File

@ -0,0 +1,257 @@
From e6b783a12f7ff491a1a2147d9fe55b4535aa046e Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 19 Jul 2011 08:38:22 +0800
Subject: [PATCH 10/12] VMDK: open/read/write for monolithicFlat image
Parse vmdk decriptor file and open mono flat image.
Read/write the flat extent.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 171 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 158 insertions(+), 13 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -65,6 +65,7 @@ typedef struct VmdkExtent {
bool flat;
int64_t sectors;
int64_t end_sector;
+ int64_t flat_start_offset;
int64_t l1_table_offset;
int64_t l1_backup_table_offset;
uint32_t *l1_table;
@@ -407,9 +408,10 @@ fail:
static int vmdk_parent_open(BlockDriverState *bs)
{
char *p_name;
- char desc[DESC_SIZE];
+ char desc[DESC_SIZE + 1];
BDRVVmdkState *s = bs->opaque;
+ desc[DESC_SIZE] = '\0';
if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) {
return -1;
}
@@ -584,6 +586,144 @@ static int vmdk_open_vmdk4(BlockDriverSt
return ret;
}
+/* find an option value out of descriptor file */
+static int vmdk_parse_description(const char *desc, const char *opt_name,
+ char *buf, int buf_size)
+{
+ char *opt_pos, *opt_end;
+ const char *end = desc + strlen(desc);
+
+ opt_pos = strstr(desc, opt_name);
+ if (!opt_pos) {
+ return -1;
+ }
+ /* Skip "=\"" following opt_name */
+ opt_pos += strlen(opt_name) + 2;
+ if (opt_pos >= end) {
+ return -1;
+ }
+ opt_end = opt_pos;
+ while (opt_end < end && *opt_end != '"') {
+ opt_end++;
+ }
+ if (opt_end == end || buf_size < opt_end - opt_pos + 1) {
+ return -1;
+ }
+ pstrcpy(buf, opt_end - opt_pos + 1, opt_pos);
+ return 0;
+}
+
+static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
+ const char *desc_file_path)
+{
+ int ret;
+ char access[11];
+ char type[11];
+ char fname[512];
+ const char *p = desc;
+ int64_t sectors = 0;
+ int64_t flat_offset;
+
+ while (*p) {
+ /* parse extent line:
+ * RW [size in sectors] FLAT "file-name.vmdk" OFFSET
+ * or
+ * RW [size in sectors] SPARSE "file-name.vmdk"
+ */
+ flat_offset = -1;
+ ret = sscanf(p, "%10s %" SCNd64 " %10s %511s %" SCNd64,
+ access, &sectors, type, fname, &flat_offset);
+ if (ret < 4 || strcmp(access, "RW")) {
+ goto next_line;
+ } else if (!strcmp(type, "FLAT")) {
+ if (ret != 5 || flat_offset < 0) {
+ return -EINVAL;
+ }
+ } else if (ret != 4) {
+ return -EINVAL;
+ }
+
+ /* trim the quotation marks around */
+ if (fname[0] == '"') {
+ memmove(fname, fname + 1, strlen(fname));
+ if (strlen(fname) <= 1 || fname[strlen(fname) - 1] != '"') {
+ return -EINVAL;
+ }
+ fname[strlen(fname) - 1] = '\0';
+ }
+ if (sectors <= 0 ||
+ (strcmp(type, "FLAT") && strcmp(type, "SPARSE")) ||
+ (strcmp(access, "RW"))) {
+ goto next_line;
+ }
+
+ /* save to extents array */
+ if (!strcmp(type, "FLAT")) {
+ /* FLAT extent */
+ char extent_path[PATH_MAX];
+ BlockDriverState *extent_file;
+ VmdkExtent *extent;
+
+ path_combine(extent_path, sizeof(extent_path),
+ desc_file_path, fname);
+ ret = bdrv_file_open(&extent_file, extent_path, bs->open_flags);
+ if (ret) {
+ return ret;
+ }
+ extent = vmdk_add_extent(bs, extent_file, true, sectors,
+ 0, 0, 0, 0, sectors);
+ extent->flat_start_offset = flat_offset;
+ } else {
+ /* SPARSE extent, not supported for now */
+ fprintf(stderr,
+ "VMDK: Not supported extent type \"%s\""".\n", type);
+ return -ENOTSUP;
+ }
+next_line:
+ /* move to next line */
+ while (*p && *p != '\n') {
+ p++;
+ }
+ p++;
+ }
+ return 0;
+}
+
+static int vmdk_open_desc_file(BlockDriverState *bs, int flags)
+{
+ int ret;
+ char buf[2048];
+ char ct[128];
+ BDRVVmdkState *s = bs->opaque;
+
+ ret = bdrv_pread(bs->file, 0, buf, sizeof(buf));
+ if (ret < 0) {
+ return ret;
+ }
+ buf[2047] = '\0';
+ if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) {
+ return -EINVAL;
+ }
+ if (strcmp(ct, "monolithicFlat")) {
+ fprintf(stderr,
+ "VMDK: Not supported image type \"%s\""".\n", ct);
+ return -ENOTSUP;
+ }
+ s->desc_offset = 0;
+ ret = vmdk_parse_extents(buf, bs, bs->file->filename);
+ if (ret) {
+ return ret;
+ }
+
+ /* try to open parent images, if exist */
+ if (vmdk_parent_open(bs)) {
+ qemu_free(s->extents);
+ return -EINVAL;
+ }
+ s->parent_cid = vmdk_read_cid(bs, 1);
+ return 0;
+}
+
static int vmdk_open(BlockDriverState *bs, int flags)
{
uint32_t magic;
@@ -598,7 +738,7 @@ static int vmdk_open(BlockDriverState *b
} else if (magic == VMDK4_MAGIC) {
return vmdk_open_vmdk4(bs, flags);
} else {
- return -EINVAL;
+ return vmdk_open_desc_file(bs, flags);
}
}
@@ -679,7 +819,7 @@ static int get_cluster_offset(BlockDrive
if (m_data)
m_data->valid = 0;
if (extent->flat) {
- *cluster_offset = 0;
+ *cluster_offset = extent->flat_start_offset;
return 0;
}
@@ -832,16 +972,20 @@ static int vmdk_read(BlockDriverState *b
/* if not allocated, try to read from parent image, if exist */
if (bs->backing_hd) {
if (!vmdk_is_cid_valid(bs))
- return -1;
+ return -EINVAL;
ret = bdrv_read(bs->backing_hd, sector_num, buf, n);
if (ret < 0)
- return -1;
+ return ret;
} else {
memset(buf, 0, 512 * n);
}
} else {
- if(bdrv_pread(bs->file, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512)
- return -1;
+ ret = bdrv_pread(extent->file,
+ cluster_offset + index_in_cluster * 512,
+ buf, n * 512);
+ if (ret < 0) {
+ return ret;
+ }
}
nb_sectors -= n;
sector_num += n;
@@ -865,7 +1009,7 @@ static int vmdk_write(BlockDriverState *
"(VMDK) Wrong offset: sector_num=0x%" PRIx64
" total_sectors=0x%" PRIx64 "\n",
sector_num, bs->total_sectors);
- return -1;
+ return -EIO;
}
while (nb_sectors > 0) {
@@ -888,16 +1032,17 @@ static int vmdk_write(BlockDriverState *
n = nb_sectors;
}
- if (bdrv_pwrite(bs->file,
+ ret = bdrv_pwrite(extent->file,
cluster_offset + index_in_cluster * 512,
- buf, n * 512)
- != n * 512) {
- return -1;
+ buf,
+ n * 512);
+ if (ret < 0) {
+ return ret;
}
if (m_data.valid) {
/* update L2 tables */
if (vmdk_L2update(extent, &m_data) == -1) {
- return -1;
+ return -EIO;
}
}
nb_sectors -= n;

595
tools/qemu/patches/0011-VMDK-create-different-subformats.patch Normal file
View File

@ -0,0 +1,595 @@
From 0d0f2ba577bd05491b5954751787f8b969ca1ec3 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famcool@gmail.com>
Date: Tue, 19 Jul 2011 08:45:23 +0800
Subject: [PATCH 11/12] VMDK: create different subformats
Add create option 'format', with enums:
monolithicSparse
monolithicFlat
twoGbMaxExtentSparse
twoGbMaxExtentFlat
Each creates a subformat image file. The default is monolithicSparse.
Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/vmdk.c | 503 ++++++++++++++++++++++++++++++++---------------------------
block_int.h | 1 +
2 files changed, 275 insertions(+), 229 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -156,8 +156,9 @@ static int vmdk_probe(const uint8_t *buf
#define CHECK_CID 1
#define SECTOR_SIZE 512
-#define DESC_SIZE 20*SECTOR_SIZE // 20 sectors of 512 bytes each
-#define HEADER_SIZE 512 // first sector of 512 bytes
+#define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */
+#define BUF_SIZE 4096
+#define HEADER_SIZE 512 /* first sector of 512 bytes */
static void vmdk_free_extents(BlockDriverState *bs)
{
@@ -243,168 +244,6 @@ static int vmdk_is_cid_valid(BlockDriver
return 1;
}
-static int vmdk_snapshot_create(const char *filename, const char *backing_file)
-{
- int snp_fd, p_fd;
- int ret;
- uint32_t p_cid;
- char *p_name, *gd_buf, *rgd_buf;
- const char *real_filename, *temp_str;
- VMDK4Header header;
- uint32_t gde_entries, gd_size;
- int64_t gd_offset, rgd_offset, capacity, gt_size;
- char p_desc[DESC_SIZE], s_desc[DESC_SIZE], hdr[HEADER_SIZE];
- static const char desc_template[] =
- "# Disk DescriptorFile\n"
- "version=1\n"
- "CID=%x\n"
- "parentCID=%x\n"
- "createType=\"monolithicSparse\"\n"
- "parentFileNameHint=\"%s\"\n"
- "\n"
- "# Extent description\n"
- "RW %u SPARSE \"%s\"\n"
- "\n"
- "# The Disk Data Base \n"
- "#DDB\n"
- "\n";
-
- snp_fd = open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, 0644);
- if (snp_fd < 0)
- return -errno;
- p_fd = open(backing_file, O_RDONLY | O_BINARY | O_LARGEFILE);
- if (p_fd < 0) {
- close(snp_fd);
- return -errno;
- }
-
- /* read the header */
- if (lseek(p_fd, 0x0, SEEK_SET) == -1) {
- ret = -errno;
- goto fail;
- }
- if (read(p_fd, hdr, HEADER_SIZE) != HEADER_SIZE) {
- ret = -errno;
- goto fail;
- }
-
- /* write the header */
- if (lseek(snp_fd, 0x0, SEEK_SET) == -1) {
- ret = -errno;
- goto fail;
- }
- if (write(snp_fd, hdr, HEADER_SIZE) == -1) {
- ret = -errno;
- goto fail;
- }
-
- memset(&header, 0, sizeof(header));
- memcpy(&header,&hdr[4], sizeof(header)); // skip the VMDK4_MAGIC
-
- if (ftruncate(snp_fd, header.grain_offset << 9)) {
- ret = -errno;
- goto fail;
- }
- /* the descriptor offset = 0x200 */
- if (lseek(p_fd, 0x200, SEEK_SET) == -1) {
- ret = -errno;
- goto fail;
- }
- if (read(p_fd, p_desc, DESC_SIZE) != DESC_SIZE) {
- ret = -errno;
- goto fail;
- }
-
- if ((p_name = strstr(p_desc,"CID")) != NULL) {
- p_name += sizeof("CID");
- sscanf(p_name,"%x",&p_cid);
- }
-
- real_filename = filename;
- if ((temp_str = strrchr(real_filename, '\\')) != NULL)
- real_filename = temp_str + 1;
- if ((temp_str = strrchr(real_filename, '/')) != NULL)
- real_filename = temp_str + 1;
- if ((temp_str = strrchr(real_filename, ':')) != NULL)
- real_filename = temp_str + 1;
-
- snprintf(s_desc, sizeof(s_desc), desc_template, p_cid, p_cid, backing_file,
- (uint32_t)header.capacity, real_filename);
-
- /* write the descriptor */
- if (lseek(snp_fd, 0x200, SEEK_SET) == -1) {
- ret = -errno;
- goto fail;
- }
- if (write(snp_fd, s_desc, strlen(s_desc)) == -1) {
- ret = -errno;
- goto fail;
- }
-
- gd_offset = header.gd_offset * SECTOR_SIZE; // offset of GD table
- rgd_offset = header.rgd_offset * SECTOR_SIZE; // offset of RGD table
- capacity = header.capacity * SECTOR_SIZE; // Extent size
- /*
- * Each GDE span 32M disk, means:
- * 512 GTE per GT, each GTE points to grain
- */
- gt_size = (int64_t)header.num_gtes_per_gte * header.granularity * SECTOR_SIZE;
- if (!gt_size) {
- ret = -EINVAL;
- goto fail;
- }
- gde_entries = (uint32_t)(capacity / gt_size); // number of gde/rgde
- gd_size = gde_entries * sizeof(uint32_t);
-
- /* write RGD */
- rgd_buf = qemu_malloc(gd_size);
- if (lseek(p_fd, rgd_offset, SEEK_SET) == -1) {
- ret = -errno;
- goto fail_rgd;
- }
- if (read(p_fd, rgd_buf, gd_size) != gd_size) {
- ret = -errno;
- goto fail_rgd;
- }
- if (lseek(snp_fd, rgd_offset, SEEK_SET) == -1) {
- ret = -errno;
- goto fail_rgd;
- }
- if (write(snp_fd, rgd_buf, gd_size) == -1) {
- ret = -errno;
- goto fail_rgd;
- }
-
- /* write GD */
- gd_buf = qemu_malloc(gd_size);
- if (lseek(p_fd, gd_offset, SEEK_SET) == -1) {
- ret = -errno;
- goto fail_gd;
- }
- if (read(p_fd, gd_buf, gd_size) != gd_size) {
- ret = -errno;
- goto fail_gd;
- }
- if (lseek(snp_fd, gd_offset, SEEK_SET) == -1) {
- ret = -errno;
- goto fail_gd;
- }
- if (write(snp_fd, gd_buf, gd_size) == -1) {
- ret = -errno;
- goto fail_gd;
- }
- ret = 0;
-
-fail_gd:
- qemu_free(gd_buf);
-fail_rgd:
- qemu_free(rgd_buf);
-fail:
- close(p_fd);
- close(snp_fd);
- return ret;
-}
-
static int vmdk_parent_open(BlockDriverState *bs)
{
char *p_name;
@@ -1058,68 +897,40 @@ static int vmdk_write(BlockDriverState *
return 0;
}
-static int vmdk_create(const char *filename, QEMUOptionParameter *options)
+
+static int vmdk_create_extent(const char *filename, int64_t filesize, bool flat)
{
- int fd, i;
+ int ret, i;
+ int fd = 0;
VMDK4Header header;
uint32_t tmp, magic, grains, gd_size, gt_size, gt_count;
- static const char desc_template[] =
- "# Disk DescriptorFile\n"
- "version=1\n"
- "CID=%x\n"
- "parentCID=ffffffff\n"
- "createType=\"monolithicSparse\"\n"
- "\n"
- "# Extent description\n"
- "RW %" PRId64 " SPARSE \"%s\"\n"
- "\n"
- "# The Disk Data Base \n"
- "#DDB\n"
- "\n"
- "ddb.virtualHWVersion = \"%d\"\n"
- "ddb.geometry.cylinders = \"%" PRId64 "\"\n"
- "ddb.geometry.heads = \"16\"\n"
- "ddb.geometry.sectors = \"63\"\n"
- "ddb.adapterType = \"ide\"\n";
- char desc[1024];
- const char *real_filename, *temp_str;
- int64_t total_size = 0;
- const char *backing_file = NULL;
- int flags = 0;
- int ret;
- // Read out options
- while (options && options->name) {
- if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
- total_size = options->value.n / 512;
- } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
- backing_file = options->value.s;
- } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) {
- flags |= options->value.n ? BLOCK_FLAG_COMPAT6: 0;
- }
- options++;
+ fd = open(
+ filename,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
+ 0644);
+ if (fd < 0) {
+ return -errno;
}
-
- /* XXX: add support for backing file */
- if (backing_file) {
- return vmdk_snapshot_create(filename, backing_file);
+ if (flat) {
+ ret = ftruncate(fd, filesize);
+ if (ret < 0) {
+ ret = -errno;
+ }
+ goto exit;
}
-
- fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
- 0644);
- if (fd < 0)
- return -errno;
magic = cpu_to_be32(VMDK4_MAGIC);
memset(&header, 0, sizeof(header));
header.version = 1;
header.flags = 3; /* ?? */
- header.capacity = total_size;
+ header.capacity = filesize / 512;
header.granularity = 128;
header.num_gtes_per_gte = 512;
- grains = (total_size + header.granularity - 1) / header.granularity;
+ grains = (filesize / 512 + header.granularity - 1) / header.granularity;
gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9;
- gt_count = (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte;
+ gt_count =
+ (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte;
gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9;
header.desc_offset = 1;
@@ -1130,7 +941,6 @@ static int vmdk_create(const char *filen
((header.gd_offset + gd_size + (gt_size * gt_count) +
header.granularity - 1) / header.granularity) *
header.granularity;
-
/* swap endianness for all header fields */
header.version = cpu_to_le32(header.version);
header.flags = cpu_to_le32(header.flags);
@@ -1188,27 +998,255 @@ static int vmdk_create(const char *filen
}
}
- /* compose the descriptor */
- real_filename = filename;
- if ((temp_str = strrchr(real_filename, '\\')) != NULL)
- real_filename = temp_str + 1;
- if ((temp_str = strrchr(real_filename, '/')) != NULL)
- real_filename = temp_str + 1;
- if ((temp_str = strrchr(real_filename, ':')) != NULL)
- real_filename = temp_str + 1;
- snprintf(desc, sizeof(desc), desc_template, (unsigned int)time(NULL),
- total_size, real_filename,
- (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
- total_size / (int64_t)(63 * 16));
+ ret = 0;
+ exit:
+ close(fd);
+ return ret;
+}
- /* write the descriptor */
- lseek(fd, le64_to_cpu(header.desc_offset) << 9, SEEK_SET);
+static int filename_decompose(const char *filename, char *path, char *prefix,
+ char *postfix, size_t buf_len)
+{
+ const char *p, *q;
+
+ if (filename == NULL || !strlen(filename)) {
+ fprintf(stderr, "Vmdk: no filename provided.\n");
+ return -1;
+ }
+ p = strrchr(filename, '/');
+ if (p == NULL) {
+ p = strrchr(filename, '\\');
+ }
+ if (p == NULL) {
+ p = strrchr(filename, ':');
+ }
+ if (p != NULL) {
+ p++;
+ if (p - filename >= buf_len) {
+ return -1;
+ }
+ pstrcpy(path, p - filename + 1, filename);
+ } else {
+ p = filename;
+ path[0] = '\0';
+ }
+ q = strrchr(p, '.');
+ if (q == NULL) {
+ pstrcpy(prefix, buf_len, p);
+ postfix[0] = '\0';
+ } else {
+ if (q - p >= buf_len) {
+ return -1;
+ }
+ pstrcpy(prefix, q - p + 1, p);
+ pstrcpy(postfix, buf_len, q);
+ }
+ return 0;
+}
+
+static int relative_path(char *dest, int dest_size,
+ const char *base, const char *target)
+{
+ int i = 0;
+ int n = 0;
+ const char *p, *q;
+#ifdef _WIN32
+ const char *sep = "\\";
+#else
+ const char *sep = "/";
+#endif
+
+ if (!(dest && base && target)) {
+ return -1;
+ }
+ if (path_is_absolute(target)) {
+ dest[dest_size - 1] = '\0';
+ strncpy(dest, target, dest_size - 1);
+ return 0;
+ }
+ while (base[i] == target[i]) {
+ i++;
+ }
+ p = &base[i];
+ q = &target[i];
+ while (*p) {
+ if (*p == *sep) {
+ n++;
+ }
+ p++;
+ }
+ dest[0] = '\0';
+ for (; n; n--) {
+ pstrcat(dest, dest_size, "..");
+ pstrcat(dest, dest_size, sep);
+ }
+ pstrcat(dest, dest_size, q);
+ return 0;
+}
+
+static int vmdk_create(const char *filename, QEMUOptionParameter *options)
+{
+ int fd, idx = 0;
+ char desc[BUF_SIZE];
+ int64_t total_size = 0, filesize;
+ const char *backing_file = NULL;
+ const char *fmt = NULL;
+ int flags = 0;
+ int ret = 0;
+ bool flat, split;
+ char ext_desc_lines[BUF_SIZE] = "";
+ char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX];
+ const int64_t split_size = 0x80000000; /* VMDK has constant split size */
+ const char *desc_extent_line;
+ char parent_desc_line[BUF_SIZE] = "";
+ uint32_t parent_cid = 0xffffffff;
+ const char desc_template[] =
+ "# Disk DescriptorFile\n"
+ "version=1\n"
+ "CID=%x\n"
+ "parentCID=%x\n"
+ "createType=\"%s\"\n"
+ "%s"
+ "\n"
+ "# Extent description\n"
+ "%s"
+ "\n"
+ "# The Disk Data Base\n"
+ "#DDB\n"
+ "\n"
+ "ddb.virtualHWVersion = \"%d\"\n"
+ "ddb.geometry.cylinders = \"%" PRId64 "\"\n"
+ "ddb.geometry.heads = \"16\"\n"
+ "ddb.geometry.sectors = \"63\"\n"
+ "ddb.adapterType = \"ide\"\n";
+
+ if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) {
+ return -EINVAL;
+ }
+ /* Read out options */
+ while (options && options->name) {
+ if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
+ total_size = options->value.n;
+ } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
+ backing_file = options->value.s;
+ } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) {
+ flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0;
+ } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) {
+ fmt = options->value.s;
+ }
+ options++;
+ }
+ if (!fmt) {
+ /* Default format to monolithicSparse */
+ fmt = "monolithicSparse";
+ } else if (strcmp(fmt, "monolithicFlat") &&
+ strcmp(fmt, "monolithicSparse") &&
+ strcmp(fmt, "twoGbMaxExtentSparse") &&
+ strcmp(fmt, "twoGbMaxExtentFlat")) {
+ fprintf(stderr, "VMDK: Unknown subformat: %s\n", fmt);
+ return -EINVAL;
+ }
+ split = !(strcmp(fmt, "twoGbMaxExtentFlat") &&
+ strcmp(fmt, "twoGbMaxExtentSparse"));
+ flat = !(strcmp(fmt, "monolithicFlat") &&
+ strcmp(fmt, "twoGbMaxExtentFlat"));
+ if (flat) {
+ desc_extent_line = "RW %lld FLAT \"%s\" 0\n";
+ } else {
+ desc_extent_line = "RW %lld SPARSE \"%s\"\n";
+ }
+ if (flat && backing_file) {
+ /* not supporting backing file for flat image */
+ return -ENOTSUP;
+ }
+ if (backing_file) {
+ char parent_filename[PATH_MAX];
+ BlockDriverState *bs = bdrv_new("");
+ ret = bdrv_open(bs, backing_file, 0, NULL);
+ if (ret != 0) {
+ bdrv_delete(bs);
+ return ret;
+ }
+ if (strcmp(bs->drv->format_name, "vmdk")) {
+ bdrv_delete(bs);
+ return -EINVAL;
+ }
+ filesize = bdrv_getlength(bs);
+ parent_cid = vmdk_read_cid(bs, 0);
+ bdrv_delete(bs);
+ relative_path(parent_filename, sizeof(parent_filename),
+ filename, backing_file);
+ snprintf(parent_desc_line, sizeof(parent_desc_line),
+ "parentFileNameHint=\"%s\"", parent_filename);
+ }
+
+ /* Create extents */
+ filesize = total_size;
+ while (filesize > 0) {
+ char desc_line[BUF_SIZE];
+ char ext_filename[PATH_MAX];
+ char desc_filename[PATH_MAX];
+ int64_t size = filesize;
+
+ if (split && size > split_size) {
+ size = split_size;
+ }
+ if (split) {
+ snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s",
+ prefix, flat ? 'f' : 's', ++idx, postfix);
+ } else if (flat) {
+ snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s",
+ prefix, postfix);
+ } else {
+ snprintf(desc_filename, sizeof(desc_filename), "%s%s",
+ prefix, postfix);
+ }
+ snprintf(ext_filename, sizeof(ext_filename), "%s%s",
+ path, desc_filename);
+
+ if (vmdk_create_extent(ext_filename, size, flat)) {
+ return -EINVAL;
+ }
+ filesize -= size;
+
+ /* Format description line */
+ snprintf(desc_line, sizeof(desc_line),
+ desc_extent_line, size / 512, desc_filename);
+ pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line);
+ }
+ /* generate descriptor file */
+ snprintf(desc, sizeof(desc), desc_template,
+ (unsigned int)time(NULL),
+ parent_cid,
+ fmt,
+ parent_desc_line,
+ ext_desc_lines,
+ (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
+ total_size / (int64_t)(63 * 16 * 512));
+ if (split || flat) {
+ fd = open(
+ filename,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
+ 0644);
+ } else {
+ fd = open(
+ filename,
+ O_WRONLY | O_BINARY | O_LARGEFILE,
+ 0644);
+ }
+ if (fd < 0) {
+ return -errno;
+ }
+ /* the descriptor offset = 0x200 */
+ if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) {
+ ret = -errno;
+ goto exit;
+ }
ret = qemu_write_full(fd, desc, strlen(desc));
if (ret != strlen(desc)) {
ret = -errno;
goto exit;
}
-
ret = 0;
exit:
close(fd);
@@ -1252,6 +1290,13 @@ static QEMUOptionParameter vmdk_create_o
.type = OPT_FLAG,
.help = "VMDK version 6 image"
},
+ {
+ .name = BLOCK_OPT_SUBFMT,
+ .type = OPT_STRING,
+ .help =
+ "VMDK flat extent format, can be one of "
+ "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat} "
+ },
{ NULL }
};
--- a/block_int.h
+++ b/block_int.h
@@ -39,6 +39,7 @@
#define BLOCK_OPT_CLUSTER_SIZE "cluster_size"
#define BLOCK_OPT_TABLE_SIZE "table_size"
#define BLOCK_OPT_PREALLOC "preallocation"
+#define BLOCK_OPT_SUBFMT "subformat"
typedef struct AIOPool {
void (*cancel)(BlockDriverAIOCB *acb);

114
tools/qemu/patches/0012-vmdk-Allow-selecting-SCSI-adapter-in-image-creation.patch Normal file
View File

@ -0,0 +1,114 @@
From 5483df4df2729a5d1e4888a48039b1cd90438480 Mon Sep 17 00:00:00 2001
From: Othmar Pasteka <pasteka@kabsi.at>
Date: Wed, 30 Jan 2013 00:26:52 +0100
Subject: [PATCH 12/12] vmdk: Allow selecting SCSI adapter in image creation
Introduce a new option "adapter_type" when converting to vmdk images.
It can be one of the following: ide (default), buslogic, lsilogic
or legacyESX (according to the vmdk spec from vmware).
In case of a non-ide adapter, heads is set to 255 instead of the 16.
The latter is used for "ide".
Also see LP#545089
Signed-off-by: Othmar Pasteka <pasteka@kabsi.at>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/vmdk.c | 31 ++++++++++++++++++++++++++++---
block_int.h | 1 +
2 files changed, 29 insertions(+), 3 deletions(-)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1089,6 +1089,7 @@ static int vmdk_create(const char *filen
int fd, idx = 0;
char desc[BUF_SIZE];
int64_t total_size = 0, filesize;
+ const char *adapter_type = NULL;
const char *backing_file = NULL;
const char *fmt = NULL;
int flags = 0;
@@ -1100,6 +1101,7 @@ static int vmdk_create(const char *filen
const char *desc_extent_line;
char parent_desc_line[BUF_SIZE] = "";
uint32_t parent_cid = 0xffffffff;
+ uint32_t number_heads = 16;
const char desc_template[] =
"# Disk DescriptorFile\n"
"version=1\n"
@@ -1116,9 +1118,9 @@ static int vmdk_create(const char *filen
"\n"
"ddb.virtualHWVersion = \"%d\"\n"
"ddb.geometry.cylinders = \"%" PRId64 "\"\n"
- "ddb.geometry.heads = \"16\"\n"
+ "ddb.geometry.heads = \"%d\"\n"
"ddb.geometry.sectors = \"63\"\n"
- "ddb.adapterType = \"ide\"\n";
+ "ddb.adapterType = \"%s\"\n";
if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) {
return -EINVAL;
@@ -1127,6 +1129,8 @@ static int vmdk_create(const char *filen
while (options && options->name) {
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
total_size = options->value.n;
+ } else if (!strcmp(options->name, BLOCK_OPT_ADAPTER_TYPE)) {
+ adapter_type = options->value.s;
} else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
backing_file = options->value.s;
} else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) {
@@ -1136,6 +1140,20 @@ static int vmdk_create(const char *filen
}
options++;
}
+ if (!adapter_type) {
+ adapter_type = "ide";
+ } else if (strcmp(adapter_type, "ide") &&
+ strcmp(adapter_type, "buslogic") &&
+ strcmp(adapter_type, "lsilogic") &&
+ strcmp(adapter_type, "legacyESX")) {
+ fprintf(stderr, "VMDK: Unknown adapter type: '%s'.\n", adapter_type);
+ return -EINVAL;
+ }
+ if (strcmp(adapter_type, "ide") != 0) {
+ /* that's the number of heads with which vmware operates when
+ creating, exporting, etc. vmdk files with a non-ide adapter type */
+ number_heads = 255;
+ }
if (!fmt) {
/* Default format to monolithicSparse */
fmt = "monolithicSparse";
@@ -1222,7 +1240,8 @@ static int vmdk_create(const char *filen
parent_desc_line,
ext_desc_lines,
(flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
- total_size / (int64_t)(63 * 16 * 512));
+ total_size / (int64_t)(63 * number_heads * 512), number_heads,
+ adapter_type);
if (split || flat) {
fd = open(
filename,
@@ -1281,6 +1300,12 @@ static QEMUOptionParameter vmdk_create_o
.help = "Virtual disk size"
},
{
+ .name = BLOCK_OPT_ADAPTER_TYPE,
+ .type = OPT_STRING,
+ .help = "Virtual adapter type, can be one of "
+ "ide (default), lsilogic, buslogic or legacyESX"
+ },
+ {
.name = BLOCK_OPT_BACKING_FILE,
.type = OPT_STRING,
.help = "File name of a base image"
--- a/block_int.h
+++ b/block_int.h
@@ -40,6 +40,7 @@
#define BLOCK_OPT_TABLE_SIZE "table_size"
#define BLOCK_OPT_PREALLOC "preallocation"
#define BLOCK_OPT_SUBFMT "subformat"
+#define BLOCK_OPT_ADAPTER_TYPE "adapter_type"
typedef struct AIOPool {
void (*cancel)(BlockDriverAIOCB *acb);