block: Use QEMU_IS_ALIGNED

Replace instances of:

    (n & (BDRV_SECTOR_SIZE - 1)) == 0

And:

   (n & ~BDRV_SECTOR_MASK) == 0

With:

    QEMU_IS_ALIGNED(n, BDRV_SECTOR_SIZE)

Which reveals the intent of the code better, and makes it easier to
locate the code checking alignment.

Signed-off-by: Nir Soffer <nsoffer@redhat.com>
Message-id: 20190827185913.27427-2-nsoffer@redhat.com
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>

diff --git a/block/bochs.c b/block/bochs.c
index 962f18592d67438c6ee3a8df9af2657bbd6f591a..32bb83b268eda764c7ba1889dd4f943e3e4ab5f6 100644 (file)
--- a/block/bochs.c
+++ b/block/bochs.c
@@ -248,8 +248,8 @@ bochs_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
     QEMUIOVector local_qiov;
     int ret;
 
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+    assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+    assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
 
     qemu_iovec_init(&local_qiov, qiov->niov);
     qemu_co_mutex_lock(&s->lock);

diff --git a/block/cloop.c b/block/cloop.c
index 384c9735bbe3c4e6657b1663c9f7285140a5a9eb..4de94876d4f0ed24ca52e9e427ae457bce50fe46 100644 (file)
--- a/block/cloop.c
+++ b/block/cloop.c
@@ -253,8 +253,8 @@ cloop_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
     int nb_sectors = bytes >> BDRV_SECTOR_BITS;
     int ret, i;
 
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+    assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+    assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
 
     qemu_co_mutex_lock(&s->lock);
 

diff --git a/block/dmg.c b/block/dmg.c
index 45f6b28f17af463c3d14c7cb43bf0258562e542c..4a045f2b3e0fb930db505211951b777b6fd73ee6 100644 (file)
--- a/block/dmg.c
+++ b/block/dmg.c
@@ -697,8 +697,8 @@ dmg_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
     int nb_sectors = bytes >> BDRV_SECTOR_BITS;
     int ret, i;
 
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+    assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+    assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
 
     qemu_co_mutex_lock(&s->lock);
 

diff --git a/block/io.c b/block/io.c
index 16a598fd0857bda70cdbf9b95e6b6625f13f84b4..f8c359613160052840b535ff7bc3d514c278369e 100644 (file)
--- a/block/io.c
+++ b/block/io.c
@@ -1097,8 +1097,8 @@ static int coroutine_fn bdrv_driver_preadv(BlockDriverState *bs,
     sector_num = offset >> BDRV_SECTOR_BITS;
     nb_sectors = bytes >> BDRV_SECTOR_BITS;
 
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+    assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+    assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
     assert(bytes <= BDRV_REQUEST_MAX_BYTES);
     assert(drv->bdrv_co_readv);
 
@@ -1171,8 +1171,8 @@ static int coroutine_fn bdrv_driver_pwritev(BlockDriverState *bs,
     sector_num = offset >> BDRV_SECTOR_BITS;
     nb_sectors = bytes >> BDRV_SECTOR_BITS;
 
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+    assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+    assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
     assert(bytes <= BDRV_REQUEST_MAX_BYTES);
 
     assert(drv->bdrv_co_writev);

diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index dcacd3c4507225780bec0b00139d24379228c600..cb44b6c6ba52ca0eac998a7095143f5ddfae5cba 100644 (file)
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -471,8 +471,8 @@ static bool coroutine_fn do_perform_cow_encrypt(BlockDriverState *bs,
 {
     if (bytes && bs->encrypted) {
         BDRVQcow2State *s = bs->opaque;
-        assert((offset_in_cluster & ~BDRV_SECTOR_MASK) == 0);
-        assert((bytes & ~BDRV_SECTOR_MASK) == 0);
+        assert(QEMU_IS_ALIGNED(offset_in_cluster, BDRV_SECTOR_SIZE));
+        assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
         assert(s->crypto);
         if (qcow2_co_encrypt(bs, cluster_offset,
                              src_cluster_offset + offset_in_cluster,

diff --git a/block/qcow2.c b/block/qcow2.c
index 57734f20cf8de673f748ae2c76badc986614675a..cac18f0ba2e4bc58f60c5385cda13953d19d0f9e 100644 (file)
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2067,8 +2067,8 @@ static coroutine_fn int qcow2_co_preadv_part(BlockDriverState *bs,
                     goto fail;
                 }
 
-                assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-                assert((cur_bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+                assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+                assert(QEMU_IS_ALIGNED(cur_bytes, BDRV_SECTOR_SIZE));
                 if (qcow2_co_decrypt(bs, cluster_offset, offset,
                                      cluster_data, cur_bytes) < 0) {
                     ret = -EIO;

diff --git a/block/vvfat.c b/block/vvfat.c
index f6c28805dda4a78e687a28c3a914d09cd4dfa8e4..019b8f1341393ccec545982ecea6f052d3263a58 100644 (file)
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -1547,8 +1547,8 @@ vvfat_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
     int nb_sectors = bytes >> BDRV_SECTOR_BITS;
     void *buf;
 
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+    assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+    assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
 
     buf = g_try_malloc(bytes);
     if (bytes && buf == NULL) {
@@ -3082,8 +3082,8 @@ vvfat_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
     int nb_sectors = bytes >> BDRV_SECTOR_BITS;
     void *buf;
 
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+    assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+    assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
 
     buf = g_try_malloc(bytes);
     if (bytes && buf == NULL) {

diff --git a/qemu-img.c b/qemu-img.c
index 4ee436fc948f31c7488a6c905519a7be8132df8f..384c6f38bc6250ce3afd9acbe1392399d491d7b7 100644 (file)
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -2141,7 +2141,7 @@ static int img_convert(int argc, char **argv)
             int64_t sval;
 
             sval = cvtnum(optarg);
-            if (sval < 0 || sval & (BDRV_SECTOR_SIZE - 1) ||
+            if (sval < 0 || !QEMU_IS_ALIGNED(sval, BDRV_SECTOR_SIZE) ||
                 sval / BDRV_SECTOR_SIZE > MAX_BUF_SECTORS) {
                 error_report("Invalid buffer size for sparse output specified. "
                     "Valid sizes are multiples of %llu up to %llu. Select "