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block/io: support int64_t bytes in read/write wrappers
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). Now, since bdrv_co_preadv_part() and bdrv_co_pwritev_part() have been updated, update all their wrappers. For all of them type of 'bytes' is widening, so callers are safe. We have update request_fn in blkverify.c simultaneously. Still it's just a pointer to one of bdrv_co_pwritev() or bdrv_co_preadv(), and type is widening for callers of the request_fn anyway. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20201211183934.169161-16-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> [eblake: grammar tweak] Signed-off-by: Eric Blake <eblake@redhat.com>
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@ -31,7 +31,7 @@ typedef struct BlkverifyRequest {
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uint64_t bytes;
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int flags;
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int (*request_fn)(BdrvChild *, int64_t, unsigned int, QEMUIOVector *,
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int (*request_fn)(BdrvChild *, int64_t, int64_t, QEMUIOVector *,
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BdrvRequestFlags);
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int ret; /* test image result */
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15
block/io.c
15
block/io.c
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@ -1005,7 +1005,7 @@ static int bdrv_check_request32(int64_t offset, int64_t bytes,
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}
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int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
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int bytes, BdrvRequestFlags flags)
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int64_t bytes, BdrvRequestFlags flags)
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{
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return bdrv_pwritev(child, offset, bytes, NULL,
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BDRV_REQ_ZERO_WRITE | flags);
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@ -1053,7 +1053,7 @@ int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags)
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}
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/* See bdrv_pwrite() for the return codes */
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int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int bytes)
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int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int64_t bytes)
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{
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int ret;
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QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
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@ -1073,7 +1073,8 @@ int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int bytes)
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-EINVAL Invalid offset or number of bytes
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-EACCES Trying to write a read-only device
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*/
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int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf, int bytes)
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int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf,
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int64_t bytes)
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{
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int ret;
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QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
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@ -1094,7 +1095,7 @@ int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf, int bytes)
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* Returns 0 on success, -errno in error cases.
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*/
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int bdrv_pwrite_sync(BdrvChild *child, int64_t offset,
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const void *buf, int count)
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const void *buf, int64_t count)
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{
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int ret;
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@ -1759,7 +1760,7 @@ static int bdrv_pad_request(BlockDriverState *bs,
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}
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int coroutine_fn bdrv_co_preadv(BdrvChild *child,
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int64_t offset, unsigned int bytes, QEMUIOVector *qiov,
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int64_t offset, int64_t bytes, QEMUIOVector *qiov,
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BdrvRequestFlags flags)
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{
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return bdrv_co_preadv_part(child, offset, bytes, qiov, 0, flags);
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@ -2186,7 +2187,7 @@ out:
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* Handle a write request in coroutine context
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*/
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int coroutine_fn bdrv_co_pwritev(BdrvChild *child,
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int64_t offset, unsigned int bytes, QEMUIOVector *qiov,
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int64_t offset, int64_t bytes, QEMUIOVector *qiov,
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BdrvRequestFlags flags)
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{
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return bdrv_co_pwritev_part(child, offset, bytes, qiov, 0, flags);
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@ -2279,7 +2280,7 @@ out:
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}
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int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset,
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int bytes, BdrvRequestFlags flags)
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int64_t bytes, BdrvRequestFlags flags)
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{
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trace_bdrv_co_pwrite_zeroes(child->bs, offset, bytes, flags);
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@ -13,7 +13,7 @@ blk_root_detach(void *child, void *blk, void *bs) "child %p blk %p bs %p"
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# io.c
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bdrv_co_preadv_part(void *bs, int64_t offset, int64_t bytes, unsigned int flags) "bs %p offset %" PRId64 " bytes %" PRId64 " flags 0x%x"
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bdrv_co_pwritev_part(void *bs, int64_t offset, int64_t bytes, unsigned int flags) "bs %p offset %" PRId64 " bytes %" PRId64 " flags 0x%x"
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bdrv_co_pwrite_zeroes(void *bs, int64_t offset, int count, int flags) "bs %p offset %"PRId64" count %d flags 0x%x"
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bdrv_co_pwrite_zeroes(void *bs, int64_t offset, int64_t bytes, int flags) "bs %p offset %" PRId64 " bytes %" PRId64 " flags 0x%x"
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bdrv_co_do_copy_on_readv(void *bs, int64_t offset, int64_t bytes, int64_t cluster_offset, int64_t cluster_bytes) "bs %p offset %" PRId64 " bytes %" PRId64 " cluster_offset %" PRId64 " cluster_bytes %" PRId64
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bdrv_co_copy_range_from(void *src, uint64_t src_offset, void *dst, uint64_t dst_offset, uint64_t bytes, int read_flags, int write_flags) "src %p offset %"PRIu64" dst %p offset %"PRIu64" bytes %"PRIu64" rw flags 0x%x 0x%x"
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bdrv_co_copy_range_to(void *src, uint64_t src_offset, void *dst, uint64_t dst_offset, uint64_t bytes, int read_flags, int write_flags) "src %p offset %"PRIu64" dst %p offset %"PRIu64" bytes %"PRIu64" rw flags 0x%x 0x%x"
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@ -392,12 +392,13 @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state,
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void bdrv_reopen_commit(BDRVReopenState *reopen_state);
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void bdrv_reopen_abort(BDRVReopenState *reopen_state);
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int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
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int bytes, BdrvRequestFlags flags);
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int64_t bytes, BdrvRequestFlags flags);
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int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags);
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int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int bytes);
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int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf, int bytes);
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int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int64_t bytes);
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int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf,
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int64_t bytes);
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int bdrv_pwrite_sync(BdrvChild *child, int64_t offset,
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const void *buf, int count);
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const void *buf, int64_t bytes);
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/*
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* Efficiently zero a region of the disk image. Note that this is a regular
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* I/O request like read or write and should have a reasonable size. This
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@ -405,7 +406,7 @@ int bdrv_pwrite_sync(BdrvChild *child, int64_t offset,
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* because it may allocate memory for the entire region.
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*/
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int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset,
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int bytes, BdrvRequestFlags flags);
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int64_t bytes, BdrvRequestFlags flags);
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BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
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const char *backing_file);
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void bdrv_refresh_filename(BlockDriverState *bs);
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@ -1032,13 +1032,13 @@ extern BlockDriver bdrv_raw;
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extern BlockDriver bdrv_qcow2;
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int coroutine_fn bdrv_co_preadv(BdrvChild *child,
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int64_t offset, unsigned int bytes, QEMUIOVector *qiov,
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int64_t offset, int64_t bytes, QEMUIOVector *qiov,
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BdrvRequestFlags flags);
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int coroutine_fn bdrv_co_preadv_part(BdrvChild *child,
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int64_t offset, int64_t bytes,
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QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags);
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int coroutine_fn bdrv_co_pwritev(BdrvChild *child,
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int64_t offset, unsigned int bytes, QEMUIOVector *qiov,
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int64_t offset, int64_t bytes, QEMUIOVector *qiov,
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BdrvRequestFlags flags);
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int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
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int64_t offset, int64_t bytes,
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