[PATCH v3 17/17] block: use int64_t instead of int in driver discard 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 discard 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        | 18 ++++++++++++++++--
 block/filter-compress.c   |  2 +-
 block/gluster.c           |  6 ++++--
 block/iscsi.c             | 10 +++++++++-
 block/mirror.c            |  2 +-
 block/nbd.c               |  4 +++-
 block/nvme.c              | 13 ++++++++++---
 block/qcow2.c             |  2 +-
 block/raw-format.c        |  2 +-
 block/sheepdog.c          | 11 +++++++++--
 block/throttle.c          |  2 +-
 17 files changed, 63 insertions(+), 23 deletions(-)

diff --git a/include/block/block_int.h b/include/block/block_int.h
index c98d591a56..ff8860fee8 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -248,7 +248,7 @@ struct BlockDriver {
     int coroutine_fn (*bdrv_co_pwrite_zeroes)(BlockDriverState *bs,
         int64_t offset, int64_t bytes, BdrvRequestFlags flags);
     int coroutine_fn (*bdrv_co_pdiscard)(BlockDriverState *bs,
-        int64_t offset, int bytes);
+        int64_t offset, int64_t bytes);
 
     /* Map [offset, offset + nbytes) range onto a child of @bs to copy from,
      * and invoke bdrv_co_copy_range_from(child, ...), or invoke
diff --git a/block/backup-top.c b/block/backup-top.c
index 2484293fb0..8c02fa3a58 100644
--- a/block/backup-top.c
+++ b/block/backup-top.c
@@ -65,7 +65,7 @@ static coroutine_fn int backup_top_cbw(BlockDriverState *bs, uint64_t offset,
 }
 
 static int coroutine_fn backup_top_co_pdiscard(BlockDriverState *bs,
-                                               int64_t offset, int bytes)
+                                               int64_t offset, int64_t bytes)
 {
     int ret = backup_top_cbw(bs, offset, bytes, 0);
     if (ret < 0) {
diff --git a/block/blkdebug.c b/block/blkdebug.c
index d593d6c85d..e1d91cf707 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -705,7 +705,7 @@ static int coroutine_fn blkdebug_co_pwrite_zeroes(BlockDriverState *bs,
 }
 
 static int coroutine_fn blkdebug_co_pdiscard(BlockDriverState *bs,
-                                             int64_t offset, int bytes)
+                                             int64_t offset, int64_t bytes)
 {
     uint32_t align = bs->bl.pdiscard_alignment;
     int err;
diff --git a/block/blklogwrites.c b/block/blklogwrites.c
index 8ca41d09cd..f488864106 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -490,9 +490,9 @@ static int coroutine_fn blk_log_writes_co_flush_to_disk(BlockDriverState *bs)
 }
 
 static int coroutine_fn
-blk_log_writes_co_pdiscard(BlockDriverState *bs, int64_t offset, int count)
+blk_log_writes_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
 {
-    return blk_log_writes_co_log(bs, offset, count, NULL, 0,
+    return blk_log_writes_co_log(bs, offset, bytes, NULL, 0,
                                  blk_log_writes_co_do_file_pdiscard,
                                  LOG_DISCARD_FLAG, false);
 }
diff --git a/block/blkreplay.c b/block/blkreplay.c
index 186d28cc6a..34a12ad5ac 100644
--- a/block/blkreplay.c
+++ b/block/blkreplay.c
@@ -106,7 +106,7 @@ static int coroutine_fn blkreplay_co_pwrite_zeroes(BlockDriverState *bs,
 }
 
 static int coroutine_fn blkreplay_co_pdiscard(BlockDriverState *bs,
-                                              int64_t offset, int bytes)
+                                              int64_t offset, int64_t bytes)
 {
     uint64_t reqid = blkreplay_next_id();
     int ret = bdrv_co_pdiscard(bs->file, offset, bytes);
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index d99e07e99f..5bf1fabee6 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -102,7 +102,7 @@ static int coroutine_fn cor_co_pwrite_zeroes(BlockDriverState *bs,
 
 
 static int coroutine_fn cor_co_pdiscard(BlockDriverState *bs,
-                                        int64_t offset, int bytes)
+                                        int64_t offset, int64_t bytes)
 {
     return bdrv_co_pdiscard(bs->file, offset, bytes);
 }
diff --git a/block/file-posix.c b/block/file-posix.c
index fa9ac5b13e..132001dba8 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2791,11 +2791,18 @@ raw_do_pdiscard(BlockDriverState *bs, int64_t offset, int bytes, bool blkdev)
 }
 
 static coroutine_fn int
-raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
+raw_co_pdiscard_old(BlockDriverState *bs, int64_t offset, int bytes)
 {
     return raw_do_pdiscard(bs, offset, bytes, false);
 }
 
+static coroutine_fn int
+raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
+{
+    assert(bytes <= INT_MAX);
+    return raw_co_pdiscard_old(bs, offset, bytes);
+}
+
 static int coroutine_fn
 raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes,
                      BdrvRequestFlags flags, bool blkdev)
@@ -3475,7 +3482,7 @@ static int fd_open(BlockDriverState *bs)
 }
 
 static coroutine_fn int
-hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
+hdev_co_pdiscard_old(BlockDriverState *bs, int64_t offset, int bytes)
 {
     BDRVRawState *s = bs->opaque;
     int ret;
@@ -3488,6 +3495,13 @@ hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
     return raw_do_pdiscard(bs, offset, bytes, true);
 }
 
+static coroutine_fn int
+hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
+{
+    assert(bytes <= INT_MAX);
+    return hdev_co_pdiscard_old(bs, offset, bytes);
+}
+
 static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs,
     int64_t offset, int64_t bytes, BdrvRequestFlags flags)
 {
diff --git a/block/filter-compress.c b/block/filter-compress.c
index 7cf47608b5..477dfaf959 100644
--- a/block/filter-compress.c
+++ b/block/filter-compress.c
@@ -93,7 +93,7 @@ static int coroutine_fn compress_co_pwrite_zeroes(BlockDriverState *bs,
 
 
 static int coroutine_fn compress_co_pdiscard(BlockDriverState *bs,
-                                             int64_t offset, int bytes)
+                                             int64_t offset, int64_t bytes)
 {
     return bdrv_co_pdiscard(bs->file, offset, bytes);
 }
diff --git a/block/gluster.c b/block/gluster.c
index 88130c3d2d..87cf69199d 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -1312,18 +1312,20 @@ error:
 
 #ifdef CONFIG_GLUSTERFS_DISCARD
 static coroutine_fn int qemu_gluster_co_pdiscard(BlockDriverState *bs,
-                                                 int64_t offset, int size)
+                                                 int64_t offset, int64_t bytes)
 {
     int ret;
     GlusterAIOCB acb;
     BDRVGlusterState *s = bs->opaque;
 
+    assert(bytes <= INT_MAX);
+
     acb.size = 0;
     acb.ret = 0;
     acb.coroutine = qemu_coroutine_self();
     acb.aio_context = bdrv_get_aio_context(bs);
 
-    ret = glfs_discard_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
+    ret = glfs_discard_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 c4183ef12f..c06521b74f 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1141,7 +1141,8 @@ iscsi_getlength(BlockDriverState *bs)
 }
 
 static int
-coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
+coroutine_fn iscsi_co_pdiscard_old(BlockDriverState *bs, int64_t offset,
+                                   int bytes)
 {
     IscsiLun *iscsilun = bs->opaque;
     struct IscsiTask iTask;
@@ -1203,6 +1204,13 @@ out_unlock:
     return r;
 }
 
+static int
+coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
+{
+    assert(bytes <= INT_MAX);
+    return iscsi_co_pdiscard_old(bs, offset, bytes);
+}
+
 static int
 coroutine_fn iscsi_co_pwrite_zeroes_old(BlockDriverState *bs, int64_t offset,
                                         int bytes, BdrvRequestFlags flags)
diff --git a/block/mirror.c b/block/mirror.c
index 7f4fdfb470..bd01c032fa 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1471,7 +1471,7 @@ static int coroutine_fn bdrv_mirror_top_pwrite_zeroes(BlockDriverState *bs,
 }
 
 static int coroutine_fn bdrv_mirror_top_pdiscard(BlockDriverState *bs,
-    int64_t offset, int bytes)
+    int64_t offset, int64_t bytes)
 {
     return bdrv_mirror_top_do_write(bs, MIRROR_METHOD_DISCARD, offset, bytes,
                                     NULL, 0);
diff --git a/block/nbd.c b/block/nbd.c
index 0e52b76d72..93d0ced28c 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -1295,7 +1295,7 @@ static int nbd_client_co_flush(BlockDriverState *bs)
 }
 
 static int nbd_client_co_pdiscard(BlockDriverState *bs, int64_t offset,
-                                  int bytes)
+                                  int64_t bytes)
 {
     BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
     NBDRequest request = {
@@ -1304,6 +1304,8 @@ static int nbd_client_co_pdiscard(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_TRIM) || !bytes) {
         return 0;
diff --git a/block/nvme.c b/block/nvme.c
index 724f894b00..adc19ee9e6 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -1166,9 +1166,9 @@ static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
     return nvme_co_pwrite_zeroes_old(bs, offset, bytes, flags);
 }
 
-static int coroutine_fn nvme_co_pdiscard(BlockDriverState *bs,
-                                         int64_t offset,
-                                         int bytes)
+static int coroutine_fn nvme_co_pdiscard_old(BlockDriverState *bs,
+                                             int64_t offset,
+                                             int bytes)
 {
     BDRVNVMeState *s = bs->opaque;
     NVMeQueuePair *ioq = s->queues[1];
@@ -1245,6 +1245,13 @@ out:
 
 }
 
+static int coroutine_fn nvme_co_pdiscard(BlockDriverState *bs,
+                                         int64_t offset,
+                                         int64_t bytes)
+{
+    assert(bytes <= INT_MAX);
+    return nvme_co_pdiscard_old(bs, offset, bytes);
+}
 
 static int nvme_reopen_prepare(BDRVReopenState *reopen_state,
                                BlockReopenQueue *queue, Error **errp)
diff --git a/block/qcow2.c b/block/qcow2.c
index 0800d0378a..c85f5a8331 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3787,7 +3787,7 @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs,
 }
 
 static coroutine_fn int qcow2_co_pdiscard(BlockDriverState *bs,
-                                          int64_t offset, int bytes)
+                                          int64_t offset, int64_t bytes)
 {
     int ret;
     BDRVQcow2State *s = bs->opaque;
diff --git a/block/raw-format.c b/block/raw-format.c
index 0996741056..f31bc4338f 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -292,7 +292,7 @@ static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
 }
 
 static int coroutine_fn raw_co_pdiscard(BlockDriverState *bs,
-                                        int64_t offset, int bytes)
+                                        int64_t offset, int64_t bytes)
 {
     int ret;
 
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 59f7ebb171..750bfae016 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -3091,8 +3091,8 @@ static int sd_load_vmstate(BlockDriverState *bs, QEMUIOVector *qiov,
 }
 
 
-static coroutine_fn int sd_co_pdiscard(BlockDriverState *bs, int64_t offset,
-                                      int bytes)
+static coroutine_fn int sd_co_pdiscard_old(BlockDriverState *bs, int64_t offset,
+                                           int bytes)
 {
     SheepdogAIOCB acb;
     BDRVSheepdogState *s = bs->opaque;
@@ -3121,6 +3121,13 @@ static coroutine_fn int sd_co_pdiscard(BlockDriverState *bs, int64_t offset,
     return acb.ret;
 }
 
+static coroutine_fn int sd_co_pdiscard(BlockDriverState *bs, int64_t offset,
+                                       int64_t bytes)
+{
+    assert(bytes <= INT_MAX);
+    return sd_co_pdiscard_old(bs, offset, bytes);
+}
+
 static coroutine_fn int
 sd_co_block_status(BlockDriverState *bs, bool want_zero, int64_t offset,
                    int64_t bytes, int64_t *pnum, int64_t *map,
diff --git a/block/throttle.c b/block/throttle.c
index c97da1d6a7..61f6c291e7 100644
--- a/block/throttle.c
+++ b/block/throttle.c
@@ -147,7 +147,7 @@ static int coroutine_fn throttle_co_pwrite_zeroes(BlockDriverState *bs,
 }
 
 static int coroutine_fn throttle_co_pdiscard(BlockDriverState *bs,
-                                             int64_t offset, int bytes)
+                                             int64_t offset, int64_t bytes)
 {
     ThrottleGroupMember *tgm = bs->opaque;
     throttle_group_co_io_limits_intercept(tgm, bytes, true);
-- 
2.21.0