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block: change variable names in BlockDriverState

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Change the 'int count' parameter in *pwrite_zeros, *pdiscard related
functions (and some others) to 'int bytes', as they both refer to bytes.
This helps with code legibility.

Signed-off-by: Manos Pitsidianakis <el13635@mail.ntua.gr>
Message-id: 20170609101808.13506-1-el13635@mail.ntua.gr
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Manos Pitsidianakis 2017-06-09 13:18:08 +03:00 • committed by Max Reitz
parent c5f1ad429c
commit f5a5ca7969
18 changed files with 161 additions and 161 deletions
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48
block/io.c
View file

@ -35,7 +35,7 @@
#define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */
static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int64_t offset, int count, BdrvRequestFlags flags);
int64_t offset, int bytes, BdrvRequestFlags flags);
void bdrv_parent_drained_begin(BlockDriverState *bs)
{
@ -666,12 +666,12 @@ int bdrv_write(BdrvChild *child, int64_t sector_num,
}
int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
int count, BdrvRequestFlags flags)
int bytes, BdrvRequestFlags flags)
{
QEMUIOVector qiov;
struct iovec iov = {
.iov_base = NULL,
.iov_len = count,
.iov_len = bytes,
};
qemu_iovec_init_external(&qiov, &iov, 1);
@ -1212,7 +1212,7 @@ int coroutine_fn bdrv_co_readv(BdrvChild *child, int64_t sector_num,
#define MAX_WRITE_ZEROES_BOUNCE_BUFFER (32768 << BDRV_SECTOR_BITS)
static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int64_t offset, int count, BdrvRequestFlags flags)
int64_t offset, int bytes, BdrvRequestFlags flags)
{
BlockDriver *drv = bs->drv;
QEMUIOVector qiov;
@ -1230,12 +1230,12 @@ static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
assert(alignment % bs->bl.request_alignment == 0);
head = offset % alignment;
tail = (offset + count) % alignment;
tail = (offset + bytes) % alignment;
max_write_zeroes = QEMU_ALIGN_DOWN(max_write_zeroes, alignment);
assert(max_write_zeroes >= bs->bl.request_alignment);
while (count > 0 && !ret) {
int num = count;
while (bytes > 0 && !ret) {
int num = bytes;
/* Align request. Block drivers can expect the "bulk" of the request
* to be aligned, and that unaligned requests do not cross cluster
@ -1245,7 +1245,7 @@ static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
/* Make a small request up to the first aligned sector. For
* convenience, limit this request to max_transfer even if
* we don't need to fall back to writes. */
num = MIN(MIN(count, max_transfer), alignment - head);
num = MIN(MIN(bytes, max_transfer), alignment - head);
head = (head + num) % alignment;
assert(num < max_write_zeroes);
} else if (tail && num > alignment) {
@ -1306,7 +1306,7 @@ static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
}
offset += num;
count -= num;
bytes -= num;
}
fail:
@ -1658,15 +1658,15 @@ int coroutine_fn bdrv_co_writev(BdrvChild *child, int64_t sector_num,
}
int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset,
int count, BdrvRequestFlags flags)
int bytes, BdrvRequestFlags flags)
{
trace_bdrv_co_pwrite_zeroes(child->bs, offset, count, flags);
trace_bdrv_co_pwrite_zeroes(child->bs, offset, bytes, flags);
if (!(child->bs->open_flags & BDRV_O_UNMAP)) {
flags &= ~BDRV_REQ_MAY_UNMAP;
}
return bdrv_co_pwritev(child, offset, count, NULL,
return bdrv_co_pwritev(child, offset, bytes, NULL,
BDRV_REQ_ZERO_WRITE | flags);
}
@ -2248,18 +2248,18 @@ int bdrv_flush(BlockDriverState *bs)
typedef struct DiscardCo {
BlockDriverState *bs;
int64_t offset;
int count;
int bytes;
int ret;
} DiscardCo;
static void coroutine_fn bdrv_pdiscard_co_entry(void *opaque)
{
DiscardCo *rwco = opaque;
rwco->ret = bdrv_co_pdiscard(rwco->bs, rwco->offset, rwco->count);
rwco->ret = bdrv_co_pdiscard(rwco->bs, rwco->offset, rwco->bytes);
}
int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset,
int count)
int bytes)
{
BdrvTrackedRequest req;
int max_pdiscard, ret;
@ -2269,7 +2269,7 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset,
return -ENOMEDIUM;
}
ret = bdrv_check_byte_request(bs, offset, count);
ret = bdrv_check_byte_request(bs, offset, bytes);
if (ret < 0) {
return ret;
} else if (bs->read_only) {
@ -2294,10 +2294,10 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset,
align = MAX(bs->bl.pdiscard_alignment, bs->bl.request_alignment);
assert(align % bs->bl.request_alignment == 0);
head = offset % align;
tail = (offset + count) % align;
tail = (offset + bytes) % align;
bdrv_inc_in_flight(bs);
tracked_request_begin(&req, bs, offset, count, BDRV_TRACKED_DISCARD);
tracked_request_begin(&req, bs, offset, bytes, BDRV_TRACKED_DISCARD);
ret = notifier_with_return_list_notify(&bs->before_write_notifiers, &req);
if (ret < 0) {
@ -2308,13 +2308,13 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset,
align);
assert(max_pdiscard >= bs->bl.request_alignment);
while (count > 0) {
while (bytes > 0) {
int ret;
int num = count;
int num = bytes;
if (head) {
/* Make small requests to get to alignment boundaries. */
num = MIN(count, align - head);
num = MIN(bytes, align - head);
if (!QEMU_IS_ALIGNED(num, bs->bl.request_alignment)) {
num %= bs->bl.request_alignment;
}
@ -2358,7 +2358,7 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset,
}
offset += num;
count -= num;
bytes -= num;
}
ret = 0;
out:
@ -2370,13 +2370,13 @@ out:
return ret;
}
int bdrv_pdiscard(BlockDriverState *bs, int64_t offset, int count)
int bdrv_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
{
Coroutine *co;
DiscardCo rwco = {
.bs = bs,
.offset = offset,
.count = count,
.bytes = bytes,
.ret = NOT_DONE,
};