Feature #11903: libcephfs: implement read/write interface support "struct iovec" - CephFS - Ceph

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Feature #11903

closed

libcephfs: implement read/write interface support "struct iovec"

Added by Haomai Wang almost 9 years ago. Updated almost 8 years ago.

Status:

Resolved

Priority:

Normal

Assignee:

Category:

Target version:

% Done:

Source:

other

Tags:

Backport:

Reviewed:

Affected Versions:

Component(FS):

libcephfs

Labels (FS):

Pull request ID:

Description

Now if qemu virtfs directly call libcephfs api, it need to retranslate iov structure to continuous buffer. We should let libcephfs read/write support iovec structure to avoid extra memcpy.

Currently it's unimplemented:
extern "C" int64_t ceph_ll_readv(class ceph_mount_info *cmount,
struct Fh *fh, const struct iovec *iov,
int iovcnt, int64_t off) {
return -1; // TODO: implement
}

extern "C" int64_t ceph_ll_writev(class ceph_mount_info *cmount,
struct Fh *fh, const struct iovec *iov,
int iovcnt, int64_t off) {
return -1; // TODO: implement
}