[Qemu-devel] [PATCH 05/10] vvfat: use public block layer interface

[Stefan Hajnoczi]

For some reason vvfat.c invokes BlockDriver functions directly and does
not go through block.h functions.  Change all direct calls except for
the .bdrv_make_empty() call for which there is no public interface.

This change makes the conversion to .bdrv_co_is_allocated() possible.

Signed-off-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com>
---
 block/vvfat.c |   15 ++++++---------
 1 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/block/vvfat.c b/block/vvfat.c
index 8511fe5..ce8049f 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -1254,10 +1254,9 @@ static int vvfat_read(BlockDriverState *bs, int64_t 
sector_num,
           return -1;
        if (s->qcow) {
            int n;
-           if (s->qcow->drv->bdrv_is_allocated(s->qcow,
-                       sector_num, nb_sectors-i, &n)) {
+           if (bdrv_is_allocated(s->qcow, sector_num, nb_sectors-i, &n)) {
 DLOG(fprintf(stderr, "sectors %d+%d allocated\n", (int)sector_num, n));
-               if (s->qcow->drv->bdrv_read(s->qcow, sector_num, buf+i*0x200, 
n))
+               if (bdrv_read(s->qcow, sector_num, buf+i*0x200, n))
                    return -1;
                i += n - 1;
                sector_num += n - 1;
@@ -1516,7 +1515,7 @@ static inline int cluster_was_modified(BDRVVVFATState* s, 
uint32_t cluster_num)
        return 0;
 
     for (i = 0; !was_modified && i < s->sectors_per_cluster; i++)
-       was_modified = s->qcow->drv->bdrv_is_allocated(s->qcow,
+       was_modified = bdrv_is_allocated(s->qcow,
                cluster2sector(s, cluster_num) + i, 1, &dummy);
 
     return was_modified;
@@ -1666,13 +1665,11 @@ static uint32_t 
get_cluster_count_for_direntry(BDRVVVFATState* s,
 
                vvfat_close_current_file(s);
                for (i = 0; i < s->sectors_per_cluster; i++)
-                   if (!s->qcow->drv->bdrv_is_allocated(s->qcow,
-                               offset + i, 1, &dummy)) {
+                   if (!bdrv_is_allocated(s->qcow, offset + i, 1, &dummy)) {
                        if (vvfat_read(s->bs,
                                    offset, s->cluster_buffer, 1))
                            return -1;
-                       if (s->qcow->drv->bdrv_write(s->qcow,
-                                   offset, s->cluster_buffer, 1))
+                       if (bdrv_write(s->qcow, offset, s->cluster_buffer, 1))
                            return -2;
                    }
            }
@@ -2714,7 +2711,7 @@ DLOG(checkpoint());
      * Use qcow backend. Commit later.
      */
 DLOG(fprintf(stderr, "Write to qcow backend: %d + %d\n", (int)sector_num, 
nb_sectors));
-    ret = s->qcow->drv->bdrv_write(s->qcow, sector_num, buf, nb_sectors);
+    ret = bdrv_write(s->qcow, sector_num, buf, nb_sectors);
     if (ret < 0) {
        fprintf(stderr, "Error writing to qcow backend\n");
        return ret;
-- 
1.7.7.1