From 588b3f6445699e7a50fd9cde23d0997534423237 Mon Sep 17 00:00:00 2001

From: Fam Zheng <famz@redhat.com>

Date: Thu, 31 Jul 2014 06:29:17 -0500

Subject: [CHANGE 29/29] vmdk: Fix creating big description file

To: rhvirt-patches@redhat.com,

    jen@redhat.com

RH-Author: Fam Zheng <famz@redhat.com>

Message-id: <1406788157-31723-1-git-send-email-famz@redhat.com>

Patchwork-id: 60347

O-Subject: [RHEL-7 qemu-kvm PATCH] vmdk: Fix creating big description file

Bugzilla: 1039791

RH-Acked-by: Kevin Wolf <kwolf@redhat.com>

RH-Acked-by: Laszlo Ersek <lersek@redhat.com>

RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>

RH-Acked-by: Markus Armbruster <armbru@redhat.com>

The buffer for description file was 4096 which only covers a few

hundred of extents. This changes the buffer to dynamic allocated with

g_strdup_printf in order to support bigger cases.

Signed-off-by: Fam Zheng <famz@redhat.com>

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

(cherry picked from commit af057fe74092df2e7a576448ddbdc0daac1370bf)

Signed-off-by: jen <jen@redhat.com>

Conflicts:

	tests/qemu-iotests/059

	tests/qemu-iotests/059.out

Contextual conflict because vmdk version 3 sample image (981cbf5) is not

backported.

Another one because we lack commit c9fbb99 "block: Use BDRV_O_NO_BACKING

where appropriate".

Signed-off-by: jen <jen@redhat.com>

---

 block/vmdk.c               |   62 +-

 tests/qemu-iotests/059     |    5 +

 tests/qemu-iotests/059.out | 2012 ++++++++++++++++++++++++++++++++++++++++++++

 3 files changed, 2055 insertions(+), 24 deletions(-)

diff --git a/block/vmdk.c b/block/vmdk.c

index 9e4b3b9..7532e11 100644

--- a/block/vmdk.c

+++ b/block/vmdk.c

@@ -1617,7 +1617,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,

                        Error **errp)

 {

     int fd, idx = 0;

-    char desc[BUF_SIZE];

+    char *desc = NULL;

     int64_t total_size = 0, filesize;

     const char *adapter_type = NULL;

     const char *backing_file = NULL;

@@ -1625,7 +1625,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,

     int flags = 0;

     int ret = 0;

     bool flat, split, compress;

-    char ext_desc_lines[BUF_SIZE] = "";

+    GString *ext_desc_lines;

     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;

@@ -1653,8 +1653,11 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,

         "ddb.geometry.sectors = \"63\"\n"

         "ddb.adapterType = \"%s\"\n";

+    ext_desc_lines = g_string_new(NULL);

+

     if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) {

-        return -EINVAL;

+        ret = -EINVAL;

+        goto exit;

     }

     /* Read out options */

     while (options && options->name) {

@@ -1680,7 +1683,8 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,

                strcmp(adapter_type, "lsilogic") &&

                strcmp(adapter_type, "legacyESX")) {

         error_setg(errp, "Unknown adapter type: '%s'", adapter_type);

-        return -EINVAL;

+        ret = -EINVAL;

+        goto exit;

     }

     if (strcmp(adapter_type, "ide") != 0) {

         /* that's the number of heads with which vmware operates when

@@ -1696,7 +1700,8 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,

                strcmp(fmt, "twoGbMaxExtentFlat") &&

                strcmp(fmt, "streamOptimized")) {

         error_setg(errp, "Unknown subformat: '%s'", fmt);

-        return -EINVAL;

+        ret = -EINVAL;

+        goto exit;

     }

     split = !(strcmp(fmt, "twoGbMaxExtentFlat") &&

               strcmp(fmt, "twoGbMaxExtentSparse"));

@@ -1710,22 +1715,25 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,

     }

     if (flat && backing_file) {

         error_setg(errp, "Flat image can't have backing file");

-        return -ENOTSUP;

+        ret = -ENOTSUP;

+        goto exit;

     }

     if (flat && zeroed_grain) {

         error_setg(errp, "Flat image can't enable zeroed grain");

-        return -ENOTSUP;

+        ret = -ENOTSUP;

+        goto exit;

     }

     if (backing_file) {

         BlockDriverState *bs = bdrv_new("");

         ret = bdrv_open(bs, backing_file, NULL, 0, NULL, errp);

         if (ret != 0) {

             bdrv_unref(bs);

-            return ret;

+            goto exit;

         }

         if (strcmp(bs->drv->format_name, "vmdk")) {

             bdrv_unref(bs);

-            return -EINVAL;

+            ret = -EINVAL;

+            goto exit;

         }

         parent_cid = vmdk_read_cid(bs, 0);

         bdrv_unref(bs);

@@ -1759,25 +1767,27 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,

         if (vmdk_create_extent(ext_filename, size,

                                flat, compress, zeroed_grain)) {

-            return -EINVAL;

+            ret = -EINVAL;

+            goto exit;

         }

         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);

+        g_string_append(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 * number_heads * 512), number_heads,

-                adapter_type);

+    desc = g_strdup_printf(desc_template,

+                           (unsigned int)time(NULL),

+                           parent_cid,

+                           fmt,

+                           parent_desc_line,

+                           ext_desc_lines->str,

+                           (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),

+                           total_size / (int64_t)(63 * number_heads * 512),

+                           number_heads,

+                           adapter_type);

     if (split || flat) {

         fd = qemu_open(filename,

                        O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,

@@ -1788,21 +1798,25 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,

                        0644);

     }

     if (fd < 0) {

-        return -errno;

+        ret = -errno;

+        goto exit;

     }

     /* the descriptor offset = 0x200 */

     if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) {

         ret = -errno;

-        goto exit;

+        goto close_exit;

     }

     ret = qemu_write_full(fd, desc, strlen(desc));

     if (ret != strlen(desc)) {

         ret = -errno;

-        goto exit;

+        goto close_exit;

     }

     ret = 0;

-exit:

+close_exit:

     qemu_close(fd);

+exit:

+    g_free(desc);

+    g_string_free(ext_desc_lines, true);

     return ret;

 }

diff --git a/tests/qemu-iotests/059 b/tests/qemu-iotests/059

index 36103e1..1ec34d5 100755

--- a/tests/qemu-iotests/059

+++ b/tests/qemu-iotests/059

@@ -75,6 +75,11 @@ echo

 echo "=== Testing monolithicFlat with zeroed_grain ==="

 IMGOPTS="subformat=monolithicFlat,zeroed_grain=on" _make_test_img 2G

+echo

+echo "=== Testing big twoGbMaxExtentFlat ==="

+IMGOPTS="subformat=twoGbMaxExtentFlat" _make_test_img 1000G

+$QEMU_IMG info $TEST_IMG | _filter_testdir | sed -e 's/cid: [0-9]*/cid: XXXXXXXX/'

+

 # success, all done

 echo "*** done"

 rm -f $seq.full

diff --git a/tests/qemu-iotests/059.out b/tests/qemu-iotests/059.out

index 5829794..262e3b2 100644

--- a/tests/qemu-iotests/059.out

+++ b/tests/qemu-iotests/059.out

@@ -25,4 +25,2016 @@ virtual size: 2.0G (2147483648 bytes)

 === Testing monolithicFlat with zeroed_grain ===

 qemu-img: TEST_DIR/t.IMGFMT: Flat image can't enable zeroed grain

 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2147483648

+

+=== Testing big twoGbMaxExtentFlat ===

+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824000

+image: TEST_DIR/t.vmdk

+file format: vmdk

+virtual size: 1.0T (1073741824000 bytes)

+disk size: 16K

+Format specific information:

+    cid: XXXXXXXX

+    parent cid: XXXXXXXX

+    create type: twoGbMaxExtentFlat

+    extents:

+        [0]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f001.vmdk

+            format: FLAT

+        [1]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f002.vmdk

+            format: FLAT

+        [2]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f003.vmdk

+            format: FLAT

+        [3]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f004.vmdk

+            format: FLAT

+        [4]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f005.vmdk

+            format: FLAT

+        [5]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f006.vmdk

+            format: FLAT

+        [6]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f007.vmdk

+            format: FLAT

+        [7]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f008.vmdk

+            format: FLAT

+        [8]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f009.vmdk

+            format: FLAT

+        [9]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f010.vmdk

+            format: FLAT

+        [10]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f011.vmdk

+            format: FLAT

+        [11]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f012.vmdk

+            format: FLAT

+        [12]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f013.vmdk

+            format: FLAT

+        [13]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f014.vmdk

+            format: FLAT

+        [14]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f015.vmdk

+            format: FLAT

+        [15]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f016.vmdk

+            format: FLAT

+        [16]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f017.vmdk

+            format: FLAT

+        [17]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f018.vmdk

+            format: FLAT

+        [18]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f019.vmdk

+            format: FLAT

+        [19]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f020.vmdk

+            format: FLAT

+        [20]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f021.vmdk

+            format: FLAT

+        [21]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f022.vmdk

+            format: FLAT

+        [22]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f023.vmdk

+            format: FLAT

+        [23]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f024.vmdk

+            format: FLAT

+        [24]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f025.vmdk

+            format: FLAT

+        [25]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f026.vmdk

+            format: FLAT

+        [26]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f027.vmdk

+            format: FLAT

+        [27]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f028.vmdk

+            format: FLAT

+        [28]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f029.vmdk

+            format: FLAT

+        [29]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f030.vmdk

+            format: FLAT

+        [30]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f031.vmdk

+            format: FLAT

+        [31]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f032.vmdk

+            format: FLAT

+        [32]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f033.vmdk

+            format: FLAT

+        [33]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f034.vmdk

+            format: FLAT

+        [34]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f035.vmdk

+            format: FLAT

+        [35]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f036.vmdk

+            format: FLAT

+        [36]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f037.vmdk

+            format: FLAT

+        [37]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f038.vmdk

+            format: FLAT

+        [38]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f039.vmdk

+            format: FLAT

+        [39]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f040.vmdk

+            format: FLAT

+        [40]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f041.vmdk

+            format: FLAT

+        [41]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f042.vmdk

+            format: FLAT

+        [42]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f043.vmdk

+            format: FLAT

+        [43]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f044.vmdk

+            format: FLAT

+        [44]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f045.vmdk

+            format: FLAT

+        [45]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f046.vmdk

+            format: FLAT

+        [46]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f047.vmdk

+            format: FLAT

+        [47]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f048.vmdk

+            format: FLAT

+        [48]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f049.vmdk

+            format: FLAT

+        [49]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f050.vmdk

+            format: FLAT

+        [50]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f051.vmdk

+            format: FLAT

+        [51]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f052.vmdk

+            format: FLAT

+        [52]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f053.vmdk

+            format: FLAT

+        [53]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f054.vmdk

+            format: FLAT

+        [54]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f055.vmdk

+            format: FLAT

+        [55]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f056.vmdk

+            format: FLAT

+        [56]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f057.vmdk

+            format: FLAT

+        [57]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f058.vmdk

+            format: FLAT

+        [58]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f059.vmdk

+            format: FLAT

+        [59]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f060.vmdk

+            format: FLAT

+        [60]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f061.vmdk

+            format: FLAT

+        [61]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f062.vmdk

+            format: FLAT

+        [62]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f063.vmdk

+            format: FLAT

+        [63]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f064.vmdk

+            format: FLAT

+        [64]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f065.vmdk

+            format: FLAT

+        [65]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f066.vmdk

+            format: FLAT

+        [66]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f067.vmdk

+            format: FLAT

+        [67]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f068.vmdk

+            format: FLAT

+        [68]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f069.vmdk

+            format: FLAT

+        [69]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f070.vmdk

+            format: FLAT

+        [70]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f071.vmdk

+            format: FLAT

+        [71]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f072.vmdk

+            format: FLAT

+        [72]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f073.vmdk

+            format: FLAT

+        [73]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f074.vmdk

+            format: FLAT

+        [74]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f075.vmdk

+            format: FLAT

+        [75]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f076.vmdk

+            format: FLAT

+        [76]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f077.vmdk

+            format: FLAT

+        [77]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f078.vmdk

+            format: FLAT

+        [78]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f079.vmdk

+            format: FLAT

+        [79]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f080.vmdk

+            format: FLAT

+        [80]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f081.vmdk

+            format: FLAT

+        [81]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f082.vmdk

+            format: FLAT

+        [82]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f083.vmdk

+            format: FLAT

+        [83]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f084.vmdk

+            format: FLAT

+        [84]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f085.vmdk

+            format: FLAT

+        [85]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f086.vmdk

+            format: FLAT

+        [86]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f087.vmdk

+            format: FLAT

+        [87]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f088.vmdk

+            format: FLAT

+        [88]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f089.vmdk

+            format: FLAT

+        [89]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f090.vmdk

+            format: FLAT

+        [90]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f091.vmdk

+            format: FLAT

+        [91]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f092.vmdk

+            format: FLAT

+        [92]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f093.vmdk

+            format: FLAT

+        [93]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f094.vmdk

+            format: FLAT

+        [94]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f095.vmdk

+            format: FLAT

+        [95]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f096.vmdk

+            format: FLAT

+        [96]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f097.vmdk

+            format: FLAT

+        [97]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f098.vmdk

+            format: FLAT

+        [98]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f099.vmdk

+            format: FLAT

+        [99]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f100.vmdk

+            format: FLAT

+        [100]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f101.vmdk

+            format: FLAT

+        [101]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f102.vmdk

+            format: FLAT

+        [102]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f103.vmdk

+            format: FLAT

+        [103]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f104.vmdk

+            format: FLAT

+        [104]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f105.vmdk

+            format: FLAT

+        [105]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f106.vmdk

+            format: FLAT

+        [106]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f107.vmdk

+            format: FLAT

+        [107]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f108.vmdk

+            format: FLAT

+        [108]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f109.vmdk

+            format: FLAT

+        [109]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f110.vmdk

+            format: FLAT

+        [110]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f111.vmdk

+            format: FLAT

+        [111]:

+            virtual size: 2147483648

+            filename: TEST_DIR/t-f112.vmdk

+            format: FLAT

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+            format: FLAT

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+            format: FLAT

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+            format: FLAT

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+        [120]:

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+        [121]:

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