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migration: size_t'ify some of qemu-file

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This is a start on using size_t more in qemu-file and friends;
it fixes up QEMUFilePutBufferFunc and QEMUFileGetBufferFunc
to take size_t lengths and return ssize_t return values (like read(2))
and fixes up all the different implementations of them.

Note that I've not yet followed this deeply into bdrv_ implementations.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <1439463094-5394-5-git-send-email-dgilbert@redhat.com>
Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2015-08-13 11:51:33 +01:00 • committed by Amit Shah
parent c50766f5a9
commit a202a4c001
7 changed files with 30 additions and 24 deletions
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8
include/migration/qemu-file.h
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@ -31,15 +31,15 @@
* The pos argument can be ignored if the file is only being used for
* streaming. The handler should try to write all of the data it can.
*/
typedef int (QEMUFilePutBufferFunc)(void *opaque, const uint8_t *buf,
int64_t pos, int size);
typedef ssize_t (QEMUFilePutBufferFunc)(void *opaque, const uint8_t *buf,
int64_t pos, size_t size);
/* Read a chunk of data from a file at the given position. The pos argument
* can be ignored if the file is only be used for streaming. The number of
* bytes actually read should be returned.
*/
typedef int (QEMUFileGetBufferFunc)(void *opaque, uint8_t *buf,
int64_t pos, int size);
typedef ssize_t (QEMUFileGetBufferFunc)(void *opaque, uint8_t *buf,
int64_t pos, size_t size);
/* Close a file
*