int
smb_write(struct smb_share *ssp, u_int16_t fid, struct uio *uio,
struct smb_cred *scred)
{
int error = 0;
size_t len, tsize, resid;
int wx = (SMB_CAPS(SSTOVC(ssp)) & SMB_CAP_LARGE_WRITEX);
resid = 0; /* XXX gcc */
tsize = uio->uio_resid;
while (tsize > 0) {
len = tsize;
if (wx)
error = smb_smb_writex(ssp, fid, &len, &resid, uio, scred);
else
error = smb_smb_write(ssp, fid, &len, &resid, uio, scred);
if (error)
break;
if (resid < len) {
error = EIO;
break;
}
tsize -= resid;
}
return error;
}
int
smb_write(struct smb_share *ssp, u_int16_t fid, struct uio *uio,
struct smb_cred *scred)
{
int error = 0, len, resid;
struct uio olduio;
olduio = *uio;
while (uio->uio_resid > 0) {
if (uio->uio_resid > INT_MAX)
len = INT_MAX;
else
len = (int)uio->uio_resid;
error = smb_smb_write(ssp, fid, &len, &resid, uio, scred);
if (error)
break;
if (resid < len) {
error = EIO;
break;
}
}
if (error) {
/*
* Errors can happen on the copyin, the rpc, etc. So they
* imply resid is unreliable. The only safe thing is
* to pretend zero bytes made it. We needn't restore the
* iovs because callers don't depend on them in error
* paths - uio_resid and uio_offset are what matter.
*/
*uio = olduio;
}
return error;
}
int
smb_write(struct smb_share *ssp, u_int16_t fid, struct uio *uio,
struct smb_cred *scred)
{
int error = 0, len, tsize, resid;
struct uio olduio;
/*
* review: manage iov more precisely
*/
if (uio->uio_iovcnt != 1) {
SMBERROR("can't handle iovcnt > 1\n");
return EIO;
}
tsize = uio->uio_resid;
olduio = *uio;
while (tsize > 0) {
len = tsize;
error = smb_smb_write(ssp, fid, &len, &resid, uio, scred);
if (error)
break;
if (resid < len) {
error = EIO;
break;
}
tsize -= resid;
}
if (error) {
*uio = olduio;
}
return error;
}