[PATCH v3 16/17] block: use int64_t instead of int in driver write_zeroes handlers

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

We are generally moving to int64_t for both offset and bytes parameters
on all io paths.

Main motivation is realization of 64-bit write_zeroes operation for
fast zeroing large disk chunks, up to the whole disk.

We chose signed type, to be consistent with off_t (which is signed) and
with possibility for signed return type (where negative value means
error).

So, convert driver write_zeroes handlers bytes parameter to int64_t.

This patch just converts handlers where it is obvious that bytes
parameter is passed further to 64bit interfaces, and add simple
wrappers where it is not obvious.

Series: 64bit-block-status
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 include/block/block_int.h |  2 +-
 block/backup-top.c        |  2 +-
 block/blkdebug.c          |  2 +-
 block/blklogwrites.c      |  4 ++--
 block/blkreplay.c         |  2 +-
 block/copy-on-read.c      |  2 +-
 block/file-posix.c        |  6 +++---
 block/filter-compress.c   |  2 +-
 block/gluster.c           |  8 +++++---
 block/iscsi.c             | 12 ++++++++++--
 block/mirror.c            |  2 +-
 block/nbd.c               |  4 +++-
 block/nvme.c              | 16 ++++++++++++----
 block/qcow2.c             |  9 ++++++++-
 block/qed.c               | 17 +++++++++++++----
 block/raw-format.c        |  2 +-
 block/throttle.c          |  2 +-
 block/vmdk.c              |  2 +-
 18 files changed, 66 insertions(+), 30 deletions(-)

diff --git a/include/block/block_int.h b/include/block/block_int.h
index 3f08baeff0..c98d591a56 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -246,7 +246,7 @@ struct BlockDriver {
      * will be called instead.
      */
     int coroutine_fn (*bdrv_co_pwrite_zeroes)(BlockDriverState *bs,
-        int64_t offset, int bytes, BdrvRequestFlags flags);
+        int64_t offset, int64_t bytes, BdrvRequestFlags flags);
     int coroutine_fn (*bdrv_co_pdiscard)(BlockDriverState *bs,
         int64_t offset, int bytes);
 
diff --git a/block/backup-top.c b/block/backup-top.c
index 519c7ea5ad..2484293fb0 100644
--- a/block/backup-top.c
+++ b/block/backup-top.c
@@ -76,7 +76,7 @@ static int coroutine_fn backup_top_co_pdiscard(BlockDriverState *bs,
 }
 
 static int coroutine_fn backup_top_co_pwrite_zeroes(BlockDriverState *bs,
-        int64_t offset, int bytes, BdrvRequestFlags flags)
+        int64_t offset, int64_t bytes, BdrvRequestFlags flags)
 {
     int ret = backup_top_cbw(bs, offset, bytes, flags);
     if (ret < 0) {
diff --git a/block/blkdebug.c b/block/blkdebug.c
index e47a686628..d593d6c85d 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -672,7 +672,7 @@ static int blkdebug_co_flush(BlockDriverState *bs)
 }
 
 static int coroutine_fn blkdebug_co_pwrite_zeroes(BlockDriverState *bs,
-                                                  int64_t offset, int bytes,
+                                                  int64_t offset, int64_t bytes,
                                                   BdrvRequestFlags flags)
 {
     uint32_t align = MAX(bs->bl.request_alignment,
diff --git a/block/blklogwrites.c b/block/blklogwrites.c
index f9697aaa75..8ca41d09cd 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -474,8 +474,8 @@ blk_log_writes_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
 }
 
 static int coroutine_fn
-blk_log_writes_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes,
-                                BdrvRequestFlags flags)
+blk_log_writes_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
+                                int64_t bytes, BdrvRequestFlags flags)
 {
     return blk_log_writes_co_log(bs, offset, bytes, NULL, flags,
                                  blk_log_writes_co_do_file_pwrite_zeroes, 0,
diff --git a/block/blkreplay.c b/block/blkreplay.c
index 98b8dff860..186d28cc6a 100644
--- a/block/blkreplay.c
+++ b/block/blkreplay.c
@@ -95,7 +95,7 @@ static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
 }
 
 static int coroutine_fn blkreplay_co_pwrite_zeroes(BlockDriverState *bs,
-    int64_t offset, int bytes, BdrvRequestFlags flags)
+    int64_t offset, int64_t bytes, BdrvRequestFlags flags)
 {
     uint64_t reqid = blkreplay_next_id();
     int ret = bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index 174e711393..d99e07e99f 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -94,7 +94,7 @@ static int coroutine_fn cor_co_pwritev(BlockDriverState *bs,
 
 
 static int coroutine_fn cor_co_pwrite_zeroes(BlockDriverState *bs,
-                                             int64_t offset, int bytes,
+                                             int64_t offset, int64_t bytes,
                                              BdrvRequestFlags flags)
 {
     return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);
diff --git a/block/file-posix.c b/block/file-posix.c
index 38c1398494..fa9ac5b13e 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2797,7 +2797,7 @@ raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
 }
 
 static int coroutine_fn
-raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes,
+raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes,
                      BdrvRequestFlags flags, bool blkdev)
 {
     BDRVRawState *s = bs->opaque;
@@ -2866,7 +2866,7 @@ raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes,
 
 static int coroutine_fn raw_co_pwrite_zeroes(
     BlockDriverState *bs, int64_t offset,
-    int bytes, BdrvRequestFlags flags)
+    int64_t bytes, BdrvRequestFlags flags)
 {
     return raw_do_pwrite_zeroes(bs, offset, bytes, flags, false);
 }
@@ -3489,7 +3489,7 @@ hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
 }
 
 static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs,
-    int64_t offset, int bytes, BdrvRequestFlags flags)
+    int64_t offset, int64_t bytes, BdrvRequestFlags flags)
 {
     int rc;
 
diff --git a/block/filter-compress.c b/block/filter-compress.c
index 09c0201c51..7cf47608b5 100644
--- a/block/filter-compress.c
+++ b/block/filter-compress.c
@@ -85,7 +85,7 @@ static int coroutine_fn compress_co_pwritev_part(BlockDriverState *bs,
 
 
 static int coroutine_fn compress_co_pwrite_zeroes(BlockDriverState *bs,
-                                                  int64_t offset, int bytes,
+                                                  int64_t offset, int64_t bytes,
                                                   BdrvRequestFlags flags)
 {
     return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);
diff --git a/block/gluster.c b/block/gluster.c
index 0aa1f2cda4..88130c3d2d 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -1017,19 +1017,21 @@ static void qemu_gluster_reopen_abort(BDRVReopenState *state)
 #ifdef CONFIG_GLUSTERFS_ZEROFILL
 static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs,
                                                       int64_t offset,
-                                                      int size,
+                                                      int64_t bytes,
                                                       BdrvRequestFlags flags)
 {
     int ret;
     GlusterAIOCB acb;
     BDRVGlusterState *s = bs->opaque;
 
-    acb.size = size;
+    assert(bytes < INT_MAX);
+
+    acb.size = bytes;
     acb.ret = 0;
     acb.coroutine = qemu_coroutine_self();
     acb.aio_context = bdrv_get_aio_context(bs);
 
-    ret = glfs_zerofill_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
+    ret = glfs_zerofill_async(s->fd, offset, bytes, gluster_finish_aiocb, &acb);
     if (ret < 0) {
         return -errno;
     }
diff --git a/block/iscsi.c b/block/iscsi.c
index 861a70c823..c4183ef12f 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1204,8 +1204,8 @@ out_unlock:
 }
 
 static int
-coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
-                                    int bytes, BdrvRequestFlags flags)
+coroutine_fn iscsi_co_pwrite_zeroes_old(BlockDriverState *bs, int64_t offset,
+                                        int bytes, BdrvRequestFlags flags)
 {
     IscsiLun *iscsilun = bs->opaque;
     struct IscsiTask iTask;
@@ -1308,6 +1308,14 @@ out_unlock:
     return r;
 }
 
+static int
+coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
+                                    int64_t bytes, BdrvRequestFlags flags)
+{
+    assert(bytes < INT_MAX);
+    return iscsi_co_pwrite_zeroes_old(bs, offset, bytes, flags);
+}
+
 static void apply_chap(struct iscsi_context *iscsi, QemuOpts *opts,
                        Error **errp)
 {
diff --git a/block/mirror.c b/block/mirror.c
index ac3d4bc8c5..7f4fdfb470 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1464,7 +1464,7 @@ static int coroutine_fn bdrv_mirror_top_flush(BlockDriverState *bs)
 }
 
 static int coroutine_fn bdrv_mirror_top_pwrite_zeroes(BlockDriverState *bs,
-    int64_t offset, int bytes, BdrvRequestFlags flags)
+    int64_t offset, int64_t bytes, BdrvRequestFlags flags)
 {
     return bdrv_mirror_top_do_write(bs, MIRROR_METHOD_ZERO, offset, bytes, NULL,
                                     flags);
diff --git a/block/nbd.c b/block/nbd.c
index 8cd417f018..0e52b76d72 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -1245,7 +1245,7 @@ static int nbd_client_co_pwritev(BlockDriverState *bs, int64_t offset,
 }
 
 static int nbd_client_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
-                                       int bytes, BdrvRequestFlags flags)
+                                       int64_t bytes, BdrvRequestFlags flags)
 {
     BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
     NBDRequest request = {
@@ -1254,6 +1254,8 @@ static int nbd_client_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
         .len = bytes,
     };
 
+    assert(bytes < INT_MAX);
+
     assert(!(s->info.flags & NBD_FLAG_READ_ONLY));
     if (!(s->info.flags & NBD_FLAG_SEND_WRITE_ZEROES)) {
         return -ENOTSUP;
diff --git a/block/nvme.c b/block/nvme.c
index d91bbe60bf..724f894b00 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -1104,10 +1104,10 @@ static coroutine_fn int nvme_co_flush(BlockDriverState *bs)
 }
 
 
-static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
-                                              int64_t offset,
-                                              int bytes,
-                                              BdrvRequestFlags flags)
+static coroutine_fn int nvme_co_pwrite_zeroes_old(BlockDriverState *bs,
+                                                  int64_t offset,
+                                                  int bytes,
+                                                  BdrvRequestFlags flags)
 {
     BDRVNVMeState *s = bs->opaque;
     NVMeQueuePair *ioq = s->queues[1];
@@ -1157,6 +1157,14 @@ static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
     return data.ret;
 }
 
+static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
+                                              int64_t offset,
+                                              int64_t bytes,
+                                              BdrvRequestFlags flags)
+{
+    assert(bytes <= INT_MAX);
+    return nvme_co_pwrite_zeroes_old(bs, offset, bytes, flags);
+}
 
 static int coroutine_fn nvme_co_pdiscard(BlockDriverState *bs,
                                          int64_t offset,
diff --git a/block/qcow2.c b/block/qcow2.c
index 15a6d3c6ef..0800d0378a 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3727,7 +3727,7 @@ static bool is_zero(BlockDriverState *bs, int64_t offset, int64_t bytes)
     return res >= 0 && (res & BDRV_BLOCK_ZERO) && nr == bytes;
 }
 
-static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs,
+static coroutine_fn int qcow2_co_pwrite_zeroes_old(BlockDriverState *bs,
     int64_t offset, int bytes, BdrvRequestFlags flags)
 {
     int ret;
@@ -3779,6 +3779,13 @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs,
     return ret;
 }
 
+static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs,
+    int64_t offset, int64_t bytes, BdrvRequestFlags flags)
+{
+    assert(bytes < INT_MAX);
+    return qcow2_co_pwrite_zeroes_old(bs, offset, bytes, flags);
+}
+
 static coroutine_fn int qcow2_co_pdiscard(BlockDriverState *bs,
                                           int64_t offset, int bytes)
 {
diff --git a/block/qed.c b/block/qed.c
index 1af9b3cb1d..fe00dbbff5 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1439,10 +1439,10 @@ static int coroutine_fn bdrv_qed_co_writev(BlockDriverState *bs,
     return qed_co_request(bs, sector_num, qiov, nb_sectors, QED_AIOCB_WRITE);
 }
 
-static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
-                                                  int64_t offset,
-                                                  int bytes,
-                                                  BdrvRequestFlags flags)
+static int coroutine_fn bdrv_qed_co_pwrite_zeroes_old(BlockDriverState *bs,
+                                                      int64_t offset,
+                                                      int bytes,
+                                                      BdrvRequestFlags flags)
 {
     BDRVQEDState *s = bs->opaque;
 
@@ -1463,6 +1463,15 @@ static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
                           QED_AIOCB_WRITE | QED_AIOCB_ZERO);
 }
 
+static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
+                                                  int64_t offset,
+                                                  int64_t bytes,
+                                                  BdrvRequestFlags flags)
+{
+    assert(bytes <= INT_MAX);
+    return bdrv_qed_co_pwrite_zeroes_old(bs, offset, bytes, flags);
+}
+
 static int coroutine_fn bdrv_qed_co_truncate(BlockDriverState *bs,
                                              int64_t offset,
                                              bool exact,
diff --git a/block/raw-format.c b/block/raw-format.c
index fdf024705b..0996741056 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -279,7 +279,7 @@ static int coroutine_fn raw_co_block_status(BlockDriverState *bs,
 }
 
 static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
-                                             int64_t offset, int bytes,
+                                             int64_t offset, int64_t bytes,
                                              BdrvRequestFlags flags)
 {
     int ret;
diff --git a/block/throttle.c b/block/throttle.c
index af8cc3b2dd..c97da1d6a7 100644
--- a/block/throttle.c
+++ b/block/throttle.c
@@ -137,7 +137,7 @@ static int coroutine_fn throttle_co_pwritev(BlockDriverState *bs,
 }
 
 static int coroutine_fn throttle_co_pwrite_zeroes(BlockDriverState *bs,
-                                                  int64_t offset, int bytes,
+                                                  int64_t offset, int64_t bytes,
                                                   BdrvRequestFlags flags)
 {
     ThrottleGroupMember *tgm = bs->opaque;
diff --git a/block/vmdk.c b/block/vmdk.c
index 61b409ebc7..9611bb191e 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -2089,7 +2089,7 @@ vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
 
 static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs,
                                               int64_t offset,
-                                              int bytes,
+                                              int64_t bytes,
                                               BdrvRequestFlags flags)
 {
     int ret;
-- 
2.21.0