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util: add return value to qemu_iovec_concat_iov 

This will be necessary later to recognize the case where a
request has both dataout and datain.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-06-10 16:21:28 +02:00
parent 1016b239c5
commit 519661ee65
2 changed files with 9 additions and 7 deletions
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6
include/qemu-common.h
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@ -315,9 +315,9 @@ void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
void qemu_iovec_concat(QEMUIOVector *dst,
QEMUIOVector *src, size_t soffset, size_t sbytes);
void qemu_iovec_concat_iov(QEMUIOVector *dst,
struct iovec *src_iov, unsigned int src_cnt,
size_t soffset, size_t sbytes);
size_t qemu_iovec_concat_iov(QEMUIOVector *dst,
struct iovec *src_iov, unsigned int src_cnt,
size_t soffset, size_t sbytes);
bool qemu_iovec_is_zero(QEMUIOVector *qiov);
void qemu_iovec_destroy(QEMUIOVector *qiov);
void qemu_iovec_reset(QEMUIOVector *qiov);

10
util/iov.c
View File

@ -295,15 +295,15 @@ void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len)
* of src".
* Only vector pointers are processed, not the actual data buffers.
*/
void qemu_iovec_concat_iov(QEMUIOVector *dst,
struct iovec *src_iov, unsigned int src_cnt,
size_t soffset, size_t sbytes)
size_t qemu_iovec_concat_iov(QEMUIOVector *dst,
struct iovec *src_iov, unsigned int src_cnt,
size_t soffset, size_t sbytes)
{
int i;
size_t done;
if (!sbytes) {
return;
return 0;
}
assert(dst->nalloc != -1);
for (i = 0, done = 0; done < sbytes && i < src_cnt; i++) {
@ -317,6 +317,8 @@ void qemu_iovec_concat_iov(QEMUIOVector *dst,
}
}
assert(soffset == 0); /* offset beyond end of src */
return done;
}
/*