vpc: Use bdrv_(p)write_sync for metadata writes
Use bdrv_(p)write_sync to ensure metadata integrity in case of a crash. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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@ -261,7 +261,7 @@ static inline int64_t get_sector_offset(BlockDriverState *bs,
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s->last_bitmap_offset = bitmap_offset;
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s->last_bitmap_offset = bitmap_offset;
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memset(bitmap, 0xff, s->bitmap_size);
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memset(bitmap, 0xff, s->bitmap_size);
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bdrv_pwrite(bs->file, bitmap_offset, bitmap, s->bitmap_size);
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bdrv_pwrite_sync(bs->file, bitmap_offset, bitmap, s->bitmap_size);
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}
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}
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// printf("sector: %" PRIx64 ", index: %x, offset: %x, bioff: %" PRIx64 ", bloff: %" PRIx64 "\n",
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// printf("sector: %" PRIx64 ", index: %x, offset: %x, bioff: %" PRIx64 ", bloff: %" PRIx64 "\n",
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@ -311,7 +311,7 @@ static int rewrite_footer(BlockDriverState* bs)
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BDRVVPCState *s = bs->opaque;
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BDRVVPCState *s = bs->opaque;
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int64_t offset = s->free_data_block_offset;
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int64_t offset = s->free_data_block_offset;
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ret = bdrv_pwrite(bs->file, offset, s->footer_buf, HEADER_SIZE);
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ret = bdrv_pwrite_sync(bs->file, offset, s->footer_buf, HEADER_SIZE);
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if (ret < 0)
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if (ret < 0)
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return ret;
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return ret;
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@ -346,7 +346,8 @@ static int64_t alloc_block(BlockDriverState* bs, int64_t sector_num)
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// Initialize the block's bitmap
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// Initialize the block's bitmap
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memset(bitmap, 0xff, s->bitmap_size);
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memset(bitmap, 0xff, s->bitmap_size);
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bdrv_pwrite(bs->file, s->free_data_block_offset, bitmap, s->bitmap_size);
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bdrv_pwrite_sync(bs->file, s->free_data_block_offset, bitmap,
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s->bitmap_size);
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// Write new footer (the old one will be overwritten)
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// Write new footer (the old one will be overwritten)
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s->free_data_block_offset += s->block_size + s->bitmap_size;
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s->free_data_block_offset += s->block_size + s->bitmap_size;
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@ -357,7 +358,7 @@ static int64_t alloc_block(BlockDriverState* bs, int64_t sector_num)
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// Write BAT entry to disk
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// Write BAT entry to disk
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bat_offset = s->bat_offset + (4 * index);
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bat_offset = s->bat_offset + (4 * index);
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bat_value = be32_to_cpu(s->pagetable[index]);
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bat_value = be32_to_cpu(s->pagetable[index]);
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ret = bdrv_pwrite(bs->file, bat_offset, &bat_value, 4);
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ret = bdrv_pwrite_sync(bs->file, bat_offset, &bat_value, 4);
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if (ret < 0)
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if (ret < 0)
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goto fail;
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goto fail;
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