From: Chuck Lever Date: Tue, 05 Dec 2006 16:35:41 -0500 SUNRPC: skb_read_bits is the same as xs_tcp_copy_data Clean-up: eliminate xs_tcp_copy_data -- it's exactly the same logic as the common routine skb_read_bits. The UDP and TCP socket read code now share the same routine for copying data into an xdr_buf. Now that skb_read_bits() is exported, rename it to avoid confusing it with a generic skb_* function. As these functions are XDR-specific, they should not have names that suggest they are of generic use. Also rename skb_read_and_csum_bits() to be consistent. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xdr.h | 1 + net/sunrpc/socklib.c | 14 +++++++------- net/sunrpc/xprtsock.c | 24 ++++-------------------- 3 files changed, 12 insertions(+), 27 deletions(-) diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index 008362b..a513354 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -157,6 +157,7 @@ typedef struct { typedef size_t (*skb_read_actor_t)(skb_reader_t *desc, void *to, size_t len); +size_t xdr_skb_read_bits(skb_reader_t *desc, void *to, size_t len); extern int csum_partial_copy_to_xdr(struct xdr_buf *, struct sk_buff *); extern ssize_t xdr_partial_copy_from_skb(struct xdr_buf *, unsigned int, skb_reader_t *, skb_read_actor_t); diff --git a/net/sunrpc/socklib.c b/net/sunrpc/socklib.c index 6f17527..cb7d46b 100644 --- a/net/sunrpc/socklib.c +++ b/net/sunrpc/socklib.c @@ -16,7 +16,7 @@ #include /** - * skb_read_bits - copy some data bits from skb to internal buffer + * xdr_skb_read_bits - copy some data bits from skb to internal buffer * @desc: sk_buff copy helper * @to: copy destination * @len: number of bytes to copy @@ -24,11 +24,11 @@ #include * Possibly called several times to iterate over an sk_buff and copy * data out of it. */ -static size_t skb_read_bits(skb_reader_t *desc, void *to, size_t len) +size_t xdr_skb_read_bits(skb_reader_t *desc, void *to, size_t len) { if (len > desc->count) len = desc->count; - if (skb_copy_bits(desc->skb, desc->offset, to, len)) + if (unlikely(skb_copy_bits(desc->skb, desc->offset, to, len))) return 0; desc->count -= len; desc->offset += len; @@ -36,14 +36,14 @@ static size_t skb_read_bits(skb_reader_t } /** - * skb_read_and_csum_bits - copy and checksum from skb to buffer + * xdr_skb_read_and_csum_bits - copy and checksum from skb to buffer * @desc: sk_buff copy helper * @to: copy destination * @len: number of bytes to copy * * Same as skb_read_bits, but calculate a checksum at the same time. */ -static size_t skb_read_and_csum_bits(skb_reader_t *desc, void *to, size_t len) +static size_t xdr_skb_read_and_csum_bits(skb_reader_t *desc, void *to, size_t len) { unsigned int csum2, pos; @@ -157,7 +157,7 @@ int csum_partial_copy_to_xdr(struct xdr_ goto no_checksum; desc.csum = csum_partial(skb->data, desc.offset, skb->csum); - if (xdr_partial_copy_from_skb(xdr, 0, &desc, skb_read_and_csum_bits) < 0) + if (xdr_partial_copy_from_skb(xdr, 0, &desc, xdr_skb_read_and_csum_bits) < 0) return -1; if (desc.offset != skb->len) { unsigned int csum2; @@ -172,7 +172,7 @@ int csum_partial_copy_to_xdr(struct xdr_ netdev_rx_csum_fault(skb->dev); return 0; no_checksum: - if (xdr_partial_copy_from_skb(xdr, 0, &desc, skb_read_bits) < 0) + if (xdr_partial_copy_from_skb(xdr, 0, &desc, xdr_skb_read_bits) < 0) return -1; if (desc.count) return -1; diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index a94aff4..450c350 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -651,22 +651,6 @@ static void xs_udp_data_ready(struct soc read_unlock(&sk->sk_callback_lock); } -static inline size_t xs_tcp_copy_data(skb_reader_t *desc, void *p, size_t len) -{ - if (len > desc->count) - len = desc->count; - if (skb_copy_bits(desc->skb, desc->offset, p, len)) { - dprintk("RPC: failed to copy %zu bytes from skb. %zu bytes remain\n", - len, desc->count); - return 0; - } - desc->offset += len; - desc->count -= len; - dprintk("RPC: copied %zu bytes from skb. %zu bytes remain\n", - len, desc->count); - return len; -} - static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, skb_reader_t *desc) { struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); @@ -675,7 +659,7 @@ static inline void xs_tcp_read_fraghdr(s p = ((char *) &transport->tcp_fraghdr) + transport->tcp_offset; len = sizeof(transport->tcp_fraghdr) - transport->tcp_offset; - used = xs_tcp_copy_data(desc, p, len); + used = xdr_skb_read_bits(desc, p, len); transport->tcp_offset += used; if (used != len) return; @@ -721,7 +705,7 @@ static inline void xs_tcp_read_xid(struc len = sizeof(transport->tcp_xid) - transport->tcp_offset; dprintk("RPC: reading XID (%Zu bytes)\n", len); p = ((char *) &transport->tcp_xid) + transport->tcp_offset; - used = xs_tcp_copy_data(desc, p, len); + used = xdr_skb_read_bits(desc, p, len); transport->tcp_offset += used; if (used != len) return; @@ -761,12 +745,12 @@ static inline void xs_tcp_read_request(s memcpy(&my_desc, desc, sizeof(my_desc)); my_desc.count = len; r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, - &my_desc, xs_tcp_copy_data); + &my_desc, xdr_skb_read_bits); desc->count -= r; desc->offset += r; } else r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, - desc, xs_tcp_copy_data); + desc, xdr_skb_read_bits); if (r > 0) { transport->tcp_copied += r;