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CIFS: Make SendReceive2() takes resp iov

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Now SendReceive2 frees the first iov and returns a response buffer
in it that increases a code complexity. Simplify this by making
a caller responsible for freeing request buffer itself and returning
a response buffer in a separate iov.

Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Pavel Shilovsky
2016-10-25 11:38:47 -07:00
committed by Steve French
parent 31473fc4f9
commit da502f7df0
5 changed files with 136 additions and 100 deletions
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5
fs/cifs/sess.c
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@@ -652,6 +652,7 @@ sess_sendreceive(struct sess_data *sess_data)
int rc;
struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base;
__u16 count;
struct kvec rsp_iov = { NULL, 0 };
count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len;
smb_buf->smb_buf_length =
@@ -661,7 +662,9 @@ sess_sendreceive(struct sess_data *sess_data)
rc = SendReceive2(sess_data->xid, sess_data->ses,
sess_data->iov, 3 /* num_iovecs */,
&sess_data->buf0_type,
CIFS_LOG_ERROR);
CIFS_LOG_ERROR, &rsp_iov);
cifs_small_buf_release(sess_data->iov[0].iov_base);
memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
return rc;
}