static void v9fs_write(void *opaque) { int cnt; ssize_t err; int32_t fid; int64_t off; int32_t count; int32_t len = 0; int32_t total = 0; size_t offset = 7; V9fsFidState *fidp; struct iovec iov[128]; /* FIXME: bad, bad, bad */ struct iovec *sg = iov; V9fsPDU *pdu = opaque; V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "dqdv", &fid, &off, &count, sg, &cnt); trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, cnt); fidp = get_fid(pdu, fid); if (fidp == NULL) { err = -EINVAL; goto out_nofid; } if (fidp->fid_type == P9_FID_FILE) { if (fidp->fs.fd == -1) { err = -EINVAL; goto out; } } else if (fidp->fid_type == P9_FID_XATTR) { /* * setxattr operation */ err = v9fs_xattr_write(s, pdu, fidp, off, count, sg, cnt); goto out; } else { err = -EINVAL; goto out; } sg = cap_sg(sg, count, &cnt); do { if (0) { print_sg(sg, cnt); } /* Loop in case of EINTR */ do { len = v9fs_co_pwritev(pdu, fidp, sg, cnt, off); if (len >= 0) { off += len; total += len; } } while (len == -EINTR && !pdu->cancelled); if (len < 0) { /* IO error return the error */ err = len; goto out; } sg = adjust_sg(sg, len, &cnt); } while (total < count && len > 0); offset += pdu_marshal(pdu, offset, "d", total); err = offset; trace_v9fs_write_return(pdu->tag, pdu->id, total, err); out: put_fid(pdu, fidp); out_nofid: complete_pdu(s, pdu, err); }