1 files changed, 14 insertions, 38 deletions

diff --git a/block/parallels.c b/block/parallels.c
index 0b64a5c..35a14aa 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -46,7 +46,6 @@ struct parallels_header {
 } __attribute__((packed));
 
 typedef struct BDRVParallelsState {
-    int fd;
 
     uint32_t *catalog_bitmap;
     int catalog_size;
@@ -68,24 +67,15 @@ static int parallels_probe(const uint8_t *buf, int buf_size, const char *filenam
     return 0;
 }
 
-static int parallels_open(BlockDriverState *bs, const char *filename, int flags)
+static int parallels_open(BlockDriverState *bs, int flags)
 {
     BDRVParallelsState *s = bs->opaque;
-    int fd, i;
+    int i;
     struct parallels_header ph;
 
-    fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE);
-    if (fd < 0) {
-        fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
-        if (fd < 0)
-            return -1;
-    }
-
     bs->read_only = 1; // no write support yet
 
-    s->fd = fd;
-
-    if (read(fd, &ph, sizeof(ph)) != sizeof(ph))
+    if (bdrv_pread(bs->file, 0, &ph, sizeof(ph)) != sizeof(ph))
         goto fail;
 
     if (memcmp(ph.magic, HEADER_MAGIC, 16) ||
@@ -95,14 +85,11 @@ static int parallels_open(BlockDriverState *bs, const char *filename, int flags)
 
     bs->total_sectors = le32_to_cpu(ph.nb_sectors);
 
-    if (lseek(s->fd, 64, SEEK_SET) != 64)
-	goto fail;
-
     s->tracks = le32_to_cpu(ph.tracks);
 
     s->catalog_size = le32_to_cpu(ph.catalog_entries);
     s->catalog_bitmap = qemu_malloc(s->catalog_size * 4);
-    if (read(s->fd, s->catalog_bitmap, s->catalog_size * 4) !=
+    if (bdrv_pread(bs->file, 64, s->catalog_bitmap, s->catalog_size * 4) !=
 	s->catalog_size * 4)
 	goto fail;
     for (i = 0; i < s->catalog_size; i++)
@@ -112,44 +99,34 @@ static int parallels_open(BlockDriverState *bs, const char *filename, int flags)
 fail:
     if (s->catalog_bitmap)
 	qemu_free(s->catalog_bitmap);
-    close(fd);
     return -1;
 }
 
-static inline int seek_to_sector(BlockDriverState *bs, int64_t sector_num)
+static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num)
 {
     BDRVParallelsState *s = bs->opaque;
-    uint32_t index, offset, position;
+    uint32_t index, offset;
 
     index = sector_num / s->tracks;
     offset = sector_num % s->tracks;
 
-    // not allocated
+    /* not allocated */
     if ((index > s->catalog_size) || (s->catalog_bitmap[index] == 0))
 	return -1;
-
-    position = (s->catalog_bitmap[index] + offset) * 512;
-
-//    fprintf(stderr, "sector: %llx index=%x offset=%x pointer=%x position=%x\n",
-//	sector_num, index, offset, s->catalog_bitmap[index], position);
-
-    if (lseek(s->fd, position, SEEK_SET) != position)
-	return -1;
-
-    return 0;
+    return (uint64_t)(s->catalog_bitmap[index] + offset) * 512;
 }
 
 static int parallels_read(BlockDriverState *bs, int64_t sector_num,
                     uint8_t *buf, int nb_sectors)
 {
-    BDRVParallelsState *s = bs->opaque;
-
     while (nb_sectors > 0) {
-	if (!seek_to_sector(bs, sector_num)) {
-	    if (read(s->fd, buf, 512) != 512)
-		return -1;
-	} else
+        int64_t position = seek_to_sector(bs, sector_num);
+        if (position >= 0) {
+            if (bdrv_pread(bs->file, position, buf, 512) != 512)
+                return -1;
+        } else {
             memset(buf, 0, 512);
+        }
         nb_sectors--;
         sector_num++;
         buf += 512;
@@ -161,7 +138,6 @@ static void parallels_close(BlockDriverState *bs)
 {
     BDRVParallelsState *s = bs->opaque;
     qemu_free(s->catalog_bitmap);
-    close(s->fd);
 }
 
 static BlockDriver bdrv_parallels = {