Patchwork [03/11] qcow2: Remove old image creation function

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Submitter Kevin Wolf
Date Oct. 22, 2010, 1:43 p.m.
Message ID <1287755036-27688-4-git-send-email-kwolf@redhat.com>
Download mbox | patch
Permalink /patch/68845/
State New
Headers show

Comments

Kevin Wolf - Oct. 22, 2010, 1:43 p.m.
They have been #ifdef'd out by the previous patch.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/qcow2.c |  224 ---------------------------------------------------------
 1 files changed, 0 insertions(+), 224 deletions(-)

Patch

diff --git a/block/qcow2.c b/block/qcow2.c
index 3b2e38c..45ed073 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -795,30 +795,6 @@  static int qcow2_change_backing_file(BlockDriverState *bs,
     return qcow2_update_ext_header(bs, backing_file, backing_fmt);
 }
 
-#if 0
-static int get_bits_from_size(size_t size)
-{
-    int res = 0;
-
-    if (size == 0) {
-        return -1;
-    }
-
-    while (size != 1) {
-        /* Not a power of two */
-        if (size & 1) {
-            return -1;
-        }
-
-        size >>= 1;
-        res++;
-    }
-
-    return res;
-}
-#endif
-
-
 static int preallocate(BlockDriverState *bs)
 {
     uint64_t nb_sectors;
@@ -872,205 +848,6 @@  static int preallocate(BlockDriverState *bs)
     return 0;
 }
 
-#if 0
-static int qcow_create2(const char *filename, int64_t total_size,
-                        const char *backing_file, const char *backing_format,
-                        int flags, size_t cluster_size, int prealloc)
-{
-
-    int fd, header_size, backing_filename_len, l1_size, i, shift, l2_bits;
-    int ref_clusters, reftable_clusters, backing_format_len = 0;
-    int rounded_ext_bf_len = 0;
-    QCowHeader header;
-    uint64_t tmp, offset;
-    uint64_t old_ref_clusters;
-    QCowCreateState s1, *s = &s1;
-    QCowExtension ext_bf = {0, 0};
-    int ret;
-
-    memset(s, 0, sizeof(*s));
-
-    fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
-    if (fd < 0)
-        return -errno;
-    memset(&header, 0, sizeof(header));
-    header.magic = cpu_to_be32(QCOW_MAGIC);
-    header.version = cpu_to_be32(QCOW_VERSION);
-    header.size = cpu_to_be64(total_size * 512);
-    header_size = sizeof(header);
-    backing_filename_len = 0;
-    if (backing_file) {
-        if (backing_format) {
-            ext_bf.magic = QCOW_EXT_MAGIC_BACKING_FORMAT;
-            backing_format_len = strlen(backing_format);
-            ext_bf.len = backing_format_len;
-            rounded_ext_bf_len = (sizeof(ext_bf) + ext_bf.len + 7) & ~7;
-            header_size += rounded_ext_bf_len;
-        }
-        header.backing_file_offset = cpu_to_be64(header_size);
-        backing_filename_len = strlen(backing_file);
-        header.backing_file_size = cpu_to_be32(backing_filename_len);
-        header_size += backing_filename_len;
-    }
-
-    /* Cluster size */
-    s->cluster_bits = get_bits_from_size(cluster_size);
-    if (s->cluster_bits < MIN_CLUSTER_BITS ||
-        s->cluster_bits > MAX_CLUSTER_BITS)
-    {
-        fprintf(stderr, "Cluster size must be a power of two between "
-            "%d and %dk\n",
-            1 << MIN_CLUSTER_BITS,
-            1 << (MAX_CLUSTER_BITS - 10));
-        return -EINVAL;
-    }
-    s->cluster_size = 1 << s->cluster_bits;
-
-    header.cluster_bits = cpu_to_be32(s->cluster_bits);
-    header_size = (header_size + 7) & ~7;
-    if (flags & BLOCK_FLAG_ENCRYPT) {
-        header.crypt_method = cpu_to_be32(QCOW_CRYPT_AES);
-    } else {
-        header.crypt_method = cpu_to_be32(QCOW_CRYPT_NONE);
-    }
-    l2_bits = s->cluster_bits - 3;
-    shift = s->cluster_bits + l2_bits;
-    l1_size = (((total_size * 512) + (1LL << shift) - 1) >> shift);
-    offset = align_offset(header_size, s->cluster_size);
-    s->l1_table_offset = offset;
-    header.l1_table_offset = cpu_to_be64(s->l1_table_offset);
-    header.l1_size = cpu_to_be32(l1_size);
-    offset += align_offset(l1_size * sizeof(uint64_t), s->cluster_size);
-
-    /* count how many refcount blocks needed */
-
-#define NUM_CLUSTERS(bytes) \
-    (((bytes) + (s->cluster_size) - 1) / (s->cluster_size))
-
-    ref_clusters = NUM_CLUSTERS(NUM_CLUSTERS(offset) * sizeof(uint16_t));
-
-    do {
-        uint64_t image_clusters;
-        old_ref_clusters = ref_clusters;
-
-        /* Number of clusters used for the refcount table */
-        reftable_clusters = NUM_CLUSTERS(ref_clusters * sizeof(uint64_t));
-
-        /* Number of clusters that the whole image will have */
-        image_clusters = NUM_CLUSTERS(offset) + ref_clusters
-            + reftable_clusters;
-
-        /* Number of refcount blocks needed for the image */
-        ref_clusters = NUM_CLUSTERS(image_clusters * sizeof(uint16_t));
-
-    } while (ref_clusters != old_ref_clusters);
-
-    s->refcount_table = qemu_mallocz(reftable_clusters * s->cluster_size);
-
-    s->refcount_table_offset = offset;
-    header.refcount_table_offset = cpu_to_be64(offset);
-    header.refcount_table_clusters = cpu_to_be32(reftable_clusters);
-    offset += (reftable_clusters * s->cluster_size);
-    s->refcount_block_offset = offset;
-
-    for (i=0; i < ref_clusters; i++) {
-        s->refcount_table[i] = cpu_to_be64(offset);
-        offset += s->cluster_size;
-    }
-
-    s->refcount_block = qemu_mallocz(ref_clusters * s->cluster_size);
-
-    /* update refcounts */
-    qcow2_create_refcount_update(s, 0, header_size);
-    qcow2_create_refcount_update(s, s->l1_table_offset,
-        l1_size * sizeof(uint64_t));
-    qcow2_create_refcount_update(s, s->refcount_table_offset,
-        reftable_clusters * s->cluster_size);
-    qcow2_create_refcount_update(s, s->refcount_block_offset,
-        ref_clusters * s->cluster_size);
-
-    /* write all the data */
-    ret = qemu_write_full(fd, &header, sizeof(header));
-    if (ret != sizeof(header)) {
-        ret = -errno;
-        goto exit;
-    }
-    if (backing_file) {
-        if (backing_format_len) {
-            char zero[16];
-            int padding = rounded_ext_bf_len - (ext_bf.len + sizeof(ext_bf));
-
-            memset(zero, 0, sizeof(zero));
-            cpu_to_be32s(&ext_bf.magic);
-            cpu_to_be32s(&ext_bf.len);
-            ret = qemu_write_full(fd, &ext_bf, sizeof(ext_bf));
-            if (ret != sizeof(ext_bf)) {
-                ret = -errno;
-                goto exit;
-            }
-            ret = qemu_write_full(fd, backing_format, backing_format_len);
-            if (ret != backing_format_len) {
-                ret = -errno;
-                goto exit;
-            }
-            if (padding > 0) {
-                ret = qemu_write_full(fd, zero, padding);
-                if (ret != padding) {
-                    ret = -errno;
-                    goto exit;
-                }
-            }
-        }
-        ret = qemu_write_full(fd, backing_file, backing_filename_len);
-        if (ret != backing_filename_len) {
-            ret = -errno;
-            goto exit;
-        }
-    }
-    lseek(fd, s->l1_table_offset, SEEK_SET);
-    tmp = 0;
-    for(i = 0;i < l1_size; i++) {
-        ret = qemu_write_full(fd, &tmp, sizeof(tmp));
-        if (ret != sizeof(tmp)) {
-            ret = -errno;
-            goto exit;
-        }
-    }
-    lseek(fd, s->refcount_table_offset, SEEK_SET);
-    ret = qemu_write_full(fd, s->refcount_table,
-        reftable_clusters * s->cluster_size);
-    if (ret != reftable_clusters * s->cluster_size) {
-        ret = -errno;
-        goto exit;
-    }
-
-    lseek(fd, s->refcount_block_offset, SEEK_SET);
-    ret = qemu_write_full(fd, s->refcount_block,
-		    ref_clusters * s->cluster_size);
-    if (ret != ref_clusters * s->cluster_size) {
-        ret = -errno;
-        goto exit;
-    }
-
-    ret = 0;
-exit:
-    qemu_free(s->refcount_table);
-    qemu_free(s->refcount_block);
-    close(fd);
-
-    /* Preallocate metadata */
-    if (ret == 0 && prealloc) {
-        BlockDriverState *bs;
-        BlockDriver *drv = bdrv_find_format("qcow2");
-        bs = bdrv_new("");
-        bdrv_open(bs, filename, BDRV_O_CACHE_WB | BDRV_O_RDWR, drv);
-        ret = preallocate(bs);
-        bdrv_close(bs);
-    }
-
-    return ret;
-}
-#else
 static int qcow_create2(const char *filename, int64_t total_size,
                         const char *backing_file, const char *backing_format,
                         int flags, size_t cluster_size, int prealloc,
@@ -1196,7 +973,6 @@  out:
     bdrv_delete(bs);
     return ret;
 }
-#endif
 
 static int qcow_create(const char *filename, QEMUOptionParameter *options)
 {