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block: Add bdrv_co_readv/writev

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Add new block driver callbacks bdrv_co_readv/writev, which work on a
QEMUIOVector like bdrv_aio_*, but don't need a callback. The function may only
be called inside a coroutine, so a block driver implementing this interface can
yield instead of blocking during I/O.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2011-07-14 17:27:13 +02:00
parent 5e3840ce24
commit da1fa91d6c
5 changed files with 59 additions and 1 deletions
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2
Makefile.objs
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@ -25,6 +25,7 @@ coroutine-obj-$(CONFIG_WIN32) += coroutine-win32.o
block-obj-y = cutils.o cache-utils.o qemu-malloc.o qemu-option.o module.o async.o
block-obj-y += nbd.o block.o aio.o aes.o qemu-config.o qemu-progress.o qemu-sockets.o
block-obj-y += $(coroutine-obj-y)
block-obj-$(CONFIG_POSIX) += posix-aio-compat.o
block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o
@ -79,7 +80,6 @@ common-obj-y += readline.o console.o cursor.o qemu-error.o
common-obj-y += $(oslib-obj-y)
common-obj-$(CONFIG_WIN32) += os-win32.o
common-obj-$(CONFIG_POSIX) += os-posix.o
common-obj-y += $(coroutine-obj-y)
common-obj-y += tcg-runtime.o host-utils.o
common-obj-y += irq.o ioport.o input.o