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-rw-r--r--block/io.c49
-rw-r--r--block/mirror.c3
-rw-r--r--block/qcow2.c8
-rw-r--r--include/block/block_int.h10
-rw-r--r--qemu-img.c10
5 files changed, 40 insertions, 40 deletions
diff --git a/block/io.c b/block/io.c
index 0854e0fdac..93231b0e26 100644
--- a/block/io.c
+++ b/block/io.c
@@ -718,7 +718,6 @@ int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags)
{
int64_t target_sectors, ret, nb_sectors, sector_num = 0;
BlockDriverState *bs = child->bs;
- BlockDriverState *file;
int n;
target_sectors = bdrv_nb_sectors(bs);
@@ -731,7 +730,7 @@ int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags)
if (nb_sectors <= 0) {
return 0;
}
- ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &n, &file);
+ ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &n, NULL);
if (ret < 0) {
error_report("error getting block status at sector %" PRId64 ": %s",
sector_num, strerror(-ret));
@@ -1820,8 +1819,9 @@ int64_t coroutine_fn bdrv_co_get_block_status_from_backing(BlockDriverState *bs,
* beyond the end of the disk image it will be clamped; if 'pnum' is set to
* the end of the image, then the returned value will include BDRV_BLOCK_EOF.
*
- * If returned value is positive and BDRV_BLOCK_OFFSET_VALID bit is set, 'file'
- * points to the BDS which the sector range is allocated in.
+ * If returned value is positive, BDRV_BLOCK_OFFSET_VALID bit is set, and
+ * 'file' is non-NULL, then '*file' points to the BDS which the sector range
+ * is allocated in.
*/
static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
int64_t sector_num,
@@ -1831,20 +1831,23 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
int64_t total_sectors;
int64_t n;
int64_t ret, ret2;
+ BlockDriverState *local_file = NULL;
- *file = NULL;
+ assert(pnum);
+ *pnum = 0;
total_sectors = bdrv_nb_sectors(bs);
if (total_sectors < 0) {
- return total_sectors;
+ ret = total_sectors;
+ goto early_out;
}
if (sector_num >= total_sectors) {
- *pnum = 0;
- return BDRV_BLOCK_EOF;
+ ret = BDRV_BLOCK_EOF;
+ goto early_out;
}
if (!nb_sectors) {
- *pnum = 0;
- return 0;
+ ret = 0;
+ goto early_out;
}
n = total_sectors - sector_num;
@@ -1860,23 +1863,23 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
}
if (bs->drv->protocol_name) {
ret |= BDRV_BLOCK_OFFSET_VALID | (sector_num * BDRV_SECTOR_SIZE);
- *file = bs;
+ local_file = bs;
}
- return ret;
+ goto early_out;
}
bdrv_inc_in_flight(bs);
ret = bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum,
- file);
+ &local_file);
if (ret < 0) {
*pnum = 0;
goto out;
}
if (ret & BDRV_BLOCK_RAW) {
- assert(ret & BDRV_BLOCK_OFFSET_VALID && *file);
- ret = bdrv_co_get_block_status(*file, ret >> BDRV_SECTOR_BITS,
- *pnum, pnum, file);
+ assert(ret & BDRV_BLOCK_OFFSET_VALID && local_file);
+ ret = bdrv_co_get_block_status(local_file, ret >> BDRV_SECTOR_BITS,
+ *pnum, pnum, &local_file);
goto out;
}
@@ -1894,14 +1897,13 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
}
}
- if (*file && *file != bs &&
+ if (local_file && local_file != bs &&
(ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
(ret & BDRV_BLOCK_OFFSET_VALID)) {
- BlockDriverState *file2;
int file_pnum;
- ret2 = bdrv_co_get_block_status(*file, ret >> BDRV_SECTOR_BITS,
- *pnum, &file_pnum, &file2);
+ ret2 = bdrv_co_get_block_status(local_file, ret >> BDRV_SECTOR_BITS,
+ *pnum, &file_pnum, NULL);
if (ret2 >= 0) {
/* Ignore errors. This is just providing extra information, it
* is useful but not necessary.
@@ -1927,6 +1929,10 @@ out:
if (ret >= 0 && sector_num + *pnum == total_sectors) {
ret |= BDRV_BLOCK_EOF;
}
+early_out:
+ if (file) {
+ *file = local_file;
+ }
return ret;
}
@@ -2026,7 +2032,6 @@ int64_t bdrv_get_block_status(BlockDriverState *bs,
int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t offset,
int64_t bytes, int64_t *pnum)
{
- BlockDriverState *file;
int64_t sector_num = offset >> BDRV_SECTOR_BITS;
int nb_sectors = bytes >> BDRV_SECTOR_BITS;
int64_t ret;
@@ -2035,7 +2040,7 @@ int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t offset,
assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE) && bytes < INT_MAX);
ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &psectors,
- &file);
+ NULL);
if (ret < 0) {
return ret;
}
diff --git a/block/mirror.c b/block/mirror.c
index 153758ca9f..e76e754d26 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -390,7 +390,6 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
int io_sectors;
unsigned int io_bytes;
int64_t io_bytes_acct;
- BlockDriverState *file;
enum MirrorMethod {
MIRROR_METHOD_COPY,
MIRROR_METHOD_ZERO,
@@ -401,7 +400,7 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
ret = bdrv_get_block_status_above(source, NULL,
offset >> BDRV_SECTOR_BITS,
nb_chunks * sectors_per_chunk,
- &io_sectors, &file);
+ &io_sectors, NULL);
io_bytes = io_sectors * BDRV_SECTOR_SIZE;
if (ret < 0) {
io_bytes = MIN(nb_chunks * s->granularity, max_io_bytes);
diff --git a/block/qcow2.c b/block/qcow2.c
index f63d1831f8..0e4c91cabc 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2976,7 +2976,6 @@ static bool is_zero_sectors(BlockDriverState *bs, int64_t start,
uint32_t count)
{
int nr;
- BlockDriverState *file;
int64_t res;
if (start + count > bs->total_sectors) {
@@ -2986,8 +2985,7 @@ static bool is_zero_sectors(BlockDriverState *bs, int64_t start,
if (!count) {
return true;
}
- res = bdrv_get_block_status_above(bs, NULL, start, count,
- &nr, &file);
+ res = bdrv_get_block_status_above(bs, NULL, start, count, &nr, NULL);
return res >= 0 && (res & BDRV_BLOCK_ZERO) && nr == count;
}
@@ -3703,13 +3701,11 @@ static BlockMeasureInfo *qcow2_measure(QemuOpts *opts, BlockDriverState *in_bs,
offset += pnum * BDRV_SECTOR_SIZE) {
int nb_sectors = MIN(ssize - offset,
BDRV_REQUEST_MAX_BYTES) / BDRV_SECTOR_SIZE;
- BlockDriverState *file;
int64_t ret;
ret = bdrv_get_block_status_above(in_bs, NULL,
offset >> BDRV_SECTOR_BITS,
- nb_sectors,
- &pnum, &file);
+ nb_sectors, &pnum, NULL);
if (ret < 0) {
error_setg_errno(&local_err, -ret,
"Unable to get block status");
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 885c08e989..246eee2e82 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -202,10 +202,12 @@ struct BlockDriver {
int64_t offset, int bytes);
/*
- * Building block for bdrv_block_status[_above]. The driver should
- * answer only according to the current layer, and should not
- * set BDRV_BLOCK_ALLOCATED, but may set BDRV_BLOCK_RAW. See block.h
- * for the meaning of _DATA, _ZERO, and _OFFSET_VALID.
+ * Building block for bdrv_block_status[_above] and
+ * bdrv_is_allocated[_above]. The driver should answer only
+ * according to the current layer, and should not set
+ * BDRV_BLOCK_ALLOCATED, but may set BDRV_BLOCK_RAW. See block.h
+ * for the meaning of _DATA, _ZERO, and _OFFSET_VALID. The block
+ * layer guarantees non-NULL pnum and file.
*/
int64_t coroutine_fn (*bdrv_co_get_block_status)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum,
diff --git a/qemu-img.c b/qemu-img.c
index d6007b2a6d..e9c7b30c91 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1375,7 +1375,6 @@ static int img_compare(int argc, char **argv)
for (;;) {
int64_t status1, status2;
- BlockDriverState *file;
nb_sectors = sectors_to_process(total_sectors, sector_num);
if (nb_sectors <= 0) {
@@ -1383,7 +1382,7 @@ static int img_compare(int argc, char **argv)
}
status1 = bdrv_get_block_status_above(bs1, NULL, sector_num,
total_sectors1 - sector_num,
- &pnum1, &file);
+ &pnum1, NULL);
if (status1 < 0) {
ret = 3;
error_report("Sector allocation test failed for %s", filename1);
@@ -1393,7 +1392,7 @@ static int img_compare(int argc, char **argv)
status2 = bdrv_get_block_status_above(bs2, NULL, sector_num,
total_sectors2 - sector_num,
- &pnum2, &file);
+ &pnum2, NULL);
if (status2 < 0) {
ret = 3;
error_report("Sector allocation test failed for %s", filename2);
@@ -1599,15 +1598,14 @@ static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num)
n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS);
if (s->sector_next_status <= sector_num) {
- BlockDriverState *file;
if (s->target_has_backing) {
ret = bdrv_get_block_status(blk_bs(s->src[src_cur]),
sector_num - src_cur_offset,
- n, &n, &file);
+ n, &n, NULL);
} else {
ret = bdrv_get_block_status_above(blk_bs(s->src[src_cur]), NULL,
sector_num - src_cur_offset,
- n, &n, &file);
+ n, &n, NULL);
}
if (ret < 0) {
return ret;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-12 22:07:12 +0000