[v3,20/44] block: Switch blk_read_unthrottled() to byte interface

Commit Message

Eric Blake April 22, 2016, 11:40 p.m. UTC

Sector-based blk_read() should die; convert the one-off
variant blk_read_unthrottled().

Signed-off-by: Eric Blake <[e-mail]>
---
 include/sysemu/block-backend.h | 4 ++--
 block/block-backend.c          | 8 ++++----
 hw/block/hd-geometry.c         | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

Patch

diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 6991b26..662a106 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -92,8 +92,8 @@  void *blk_get_attached_dev(BlockBackend *blk);
 void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
 int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
              int nb_sectors);
-int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
-                         int nb_sectors);
+int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
+                          int count);
 int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf,
               int nb_sectors);
 int blk_write_zeroes(BlockBackend *blk, int64_t sector_num,
diff --git a/block/block-backend.c b/block/block-backend.c
index 4551865..5513b6f 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -790,21 +790,21 @@  int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
     return blk_rw(blk, sector_num, buf, nb_sectors, blk_read_entry, 0);
 }

-int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
-                         int nb_sectors)
+int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
+                          int count)
 {
     BlockDriverState *bs = blk_bs(blk);
     bool enabled;
     int ret;

-    ret = blk_check_request(blk, sector_num, nb_sectors);
+    ret = blk_check_byte_request(blk, offset, count);
     if (ret < 0) {
         return ret;
     }

     enabled = bs->io_limits_enabled;
     bs->io_limits_enabled = false;
-    ret = blk_read(blk, sector_num, buf, nb_sectors);
+    ret = blk_pread(blk, offset, buf, count);
     bs->io_limits_enabled = enabled;
     return ret;
 }
diff --git a/hw/block/hd-geometry.c b/hw/block/hd-geometry.c
index 6d02192..d388f13 100644
--- a/hw/block/hd-geometry.c
+++ b/hw/block/hd-geometry.c
@@ -66,7 +66,7 @@  static int guess_disk_lchs(BlockBackend *blk,
      * but also in async I/O mode. So the I/O throttling function has to
      * be disabled temporarily here, not permanently.
      */
-    if (blk_read_unthrottled(blk, 0, buf, 1) < 0) {
+    if (blk_pread_unthrottled(blk, 0, buf, BDRV_SECTOR_SIZE) < 0) {
         return -1;
     }
     /* test msdos magic */