diff options
Diffstat (limited to 'testing/linux-scst/put_page_callback-2.6.34.patch')
| -rw-r--r-- | testing/linux-scst/put_page_callback-2.6.34.patch | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/testing/linux-scst/put_page_callback-2.6.34.patch b/testing/linux-scst/put_page_callback-2.6.34.patch new file mode 100644 index 00000000..97d6f7f0 --- /dev/null +++ b/testing/linux-scst/put_page_callback-2.6.34.patch @@ -0,0 +1,390 @@ +diff -upkr linux-2.6.34/include/linux/mm_types.h linux-2.6.34/include/linux/mm_types.h +--- linux-2.6.34/include/linux/mm_types.h 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/include/linux/mm_types.h 2010-05-24 14:51:40.000000000 +0400 +@@ -100,6 +100,18 @@ struct page { + */ + void *shadow; + #endif ++ ++#if defined(CONFIG_TCP_ZERO_COPY_TRANSFER_COMPLETION_NOTIFICATION) ++ /* ++ * Used to implement support for notification on zero-copy TCP transfer ++ * completion. It might look as not good to have this field here and ++ * it's better to have it in struct sk_buff, but it would make the code ++ * much more complicated and fragile, since all skb then would have to ++ * contain only pages with the same value in this field. ++ */ ++ void *net_priv; ++#endif ++ + }; + + /* +diff -upkr linux-2.6.34/include/linux/net.h linux-2.6.34/include/linux/net.h +--- linux-2.6.34/include/linux/net.h 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/include/linux/net.h 2010-05-24 14:51:40.000000000 +0400 +@@ -20,6 +20,7 @@ + + #include <linux/socket.h> + #include <asm/socket.h> ++#include <linux/mm.h> + + #define NPROTO AF_MAX + +@@ -288,5 +289,44 @@ extern int kernel_sock_shutdown(struct s + extern struct ratelimit_state net_ratelimit_state; + #endif + ++#if defined(CONFIG_TCP_ZERO_COPY_TRANSFER_COMPLETION_NOTIFICATION) ++/* Support for notification on zero-copy TCP transfer completion */ ++typedef void (*net_get_page_callback_t)(struct page *page); ++typedef void (*net_put_page_callback_t)(struct page *page); ++ ++extern net_get_page_callback_t net_get_page_callback; ++extern net_put_page_callback_t net_put_page_callback; ++ ++extern int net_set_get_put_page_callbacks( ++ net_get_page_callback_t get_callback, ++ net_put_page_callback_t put_callback); ++ ++/* ++ * See comment for net_set_get_put_page_callbacks() why those functions ++ * don't need any protection. ++ */ ++static inline void net_get_page(struct page *page) ++{ ++ if (page->net_priv != 0) ++ net_get_page_callback(page); ++ get_page(page); ++} ++static inline void net_put_page(struct page *page) ++{ ++ if (page->net_priv != 0) ++ net_put_page_callback(page); ++ put_page(page); ++} ++#else ++static inline void net_get_page(struct page *page) ++{ ++ get_page(page); ++} ++static inline void net_put_page(struct page *page) ++{ ++ put_page(page); ++} ++#endif /* CONFIG_TCP_ZERO_COPY_TRANSFER_COMPLETION_NOTIFICATION */ ++ + #endif /* __KERNEL__ */ + #endif /* _LINUX_NET_H */ +diff -upkr linux-2.6.34/net/core/dev.c linux-2.6.34/net/core/dev.c +--- linux-2.6.34/net/core/dev.c 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/net/core/dev.c 2010-05-24 14:51:40.000000000 +0400 +@@ -2732,7 +2732,7 @@ pull: + skb_shinfo(skb)->frags[0].size -= grow; + + if (unlikely(!skb_shinfo(skb)->frags[0].size)) { +- put_page(skb_shinfo(skb)->frags[0].page); ++ net_put_page(skb_shinfo(skb)->frags[0].page); + memmove(skb_shinfo(skb)->frags, + skb_shinfo(skb)->frags + 1, + --skb_shinfo(skb)->nr_frags); +diff -upkr linux-2.6.34/net/core/skbuff.c linux-2.6.34/net/core/skbuff.c +--- linux-2.6.34/net/core/skbuff.c 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/net/core/skbuff.c 2010-05-24 14:51:40.000000000 +0400 +@@ -76,13 +76,13 @@ static struct kmem_cache *skbuff_fclone_ + static void sock_pipe_buf_release(struct pipe_inode_info *pipe, + struct pipe_buffer *buf) + { +- put_page(buf->page); ++ net_put_page(buf->page); + } + + static void sock_pipe_buf_get(struct pipe_inode_info *pipe, + struct pipe_buffer *buf) + { +- get_page(buf->page); ++ net_get_page(buf->page); + } + + static int sock_pipe_buf_steal(struct pipe_inode_info *pipe, +@@ -344,7 +344,7 @@ static void skb_release_data(struct sk_b + if (skb_shinfo(skb)->nr_frags) { + int i; + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) +- put_page(skb_shinfo(skb)->frags[i].page); ++ net_put_page(skb_shinfo(skb)->frags[i].page); + } + + if (skb_has_frags(skb)) +@@ -765,7 +765,7 @@ struct sk_buff *pskb_copy(struct sk_buff + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + skb_shinfo(n)->frags[i] = skb_shinfo(skb)->frags[i]; +- get_page(skb_shinfo(n)->frags[i].page); ++ net_get_page(skb_shinfo(n)->frags[i].page); + } + skb_shinfo(n)->nr_frags = i; + } +@@ -831,7 +831,7 @@ int pskb_expand_head(struct sk_buff *skb + sizeof(struct skb_shared_info)); + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) +- get_page(skb_shinfo(skb)->frags[i].page); ++ net_get_page(skb_shinfo(skb)->frags[i].page); + + if (skb_has_frags(skb)) + skb_clone_fraglist(skb); +@@ -1105,7 +1105,7 @@ drop_pages: + skb_shinfo(skb)->nr_frags = i; + + for (; i < nfrags; i++) +- put_page(skb_shinfo(skb)->frags[i].page); ++ net_put_page(skb_shinfo(skb)->frags[i].page); + + if (skb_has_frags(skb)) + skb_drop_fraglist(skb); +@@ -1274,7 +1274,7 @@ pull_pages: + k = 0; + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + if (skb_shinfo(skb)->frags[i].size <= eat) { +- put_page(skb_shinfo(skb)->frags[i].page); ++ net_put_page(skb_shinfo(skb)->frags[i].page); + eat -= skb_shinfo(skb)->frags[i].size; + } else { + skb_shinfo(skb)->frags[k] = skb_shinfo(skb)->frags[i]; +@@ -1375,7 +1375,7 @@ EXPORT_SYMBOL(skb_copy_bits); + */ + static void sock_spd_release(struct splice_pipe_desc *spd, unsigned int i) + { +- put_page(spd->pages[i]); ++ net_put_page(spd->pages[i]); + } + + static inline struct page *linear_to_page(struct page *page, unsigned int *len, +@@ -1399,7 +1399,7 @@ new_page: + off = sk->sk_sndmsg_off; + mlen = PAGE_SIZE - off; + if (mlen < 64 && mlen < *len) { +- put_page(p); ++ net_put_page(p); + goto new_page; + } + +@@ -1409,7 +1409,7 @@ new_page: + memcpy(page_address(p) + off, page_address(page) + *offset, *len); + sk->sk_sndmsg_off += *len; + *offset = off; +- get_page(p); ++ net_get_page(p); + + return p; + } +@@ -1430,7 +1430,7 @@ static inline int spd_fill_page(struct s + if (!page) + return 1; + } else +- get_page(page); ++ net_get_page(page); + + spd->pages[spd->nr_pages] = page; + spd->partial[spd->nr_pages].len = *len; +@@ -2060,7 +2060,7 @@ static inline void skb_split_no_header(s + * where splitting is expensive. + * 2. Split is accurately. We make this. + */ +- get_page(skb_shinfo(skb)->frags[i].page); ++ net_get_page(skb_shinfo(skb)->frags[i].page); + skb_shinfo(skb1)->frags[0].page_offset += len - pos; + skb_shinfo(skb1)->frags[0].size -= len - pos; + skb_shinfo(skb)->frags[i].size = len - pos; +@@ -2182,7 +2182,7 @@ int skb_shift(struct sk_buff *tgt, struc + to++; + + } else { +- get_page(fragfrom->page); ++ net_get_page(fragfrom->page); + fragto->page = fragfrom->page; + fragto->page_offset = fragfrom->page_offset; + fragto->size = todo; +@@ -2204,7 +2204,7 @@ int skb_shift(struct sk_buff *tgt, struc + fragto = &skb_shinfo(tgt)->frags[merge]; + + fragto->size += fragfrom->size; +- put_page(fragfrom->page); ++ net_put_page(fragfrom->page); + } + + /* Reposition in the original skb */ +@@ -2602,7 +2602,7 @@ struct sk_buff *skb_segment(struct sk_bu + + while (pos < offset + len && i < nfrags) { + *frag = skb_shinfo(skb)->frags[i]; +- get_page(frag->page); ++ net_get_page(frag->page); + size = frag->size; + + if (pos < offset) { +diff -upkr linux-2.6.34/net/ipv4/ip_output.c linux-2.6.34/net/ipv4/ip_output.c +--- linux-2.6.34/net/ipv4/ip_output.c 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/net/ipv4/ip_output.c 2010-05-24 14:51:40.000000000 +0400 +@@ -1024,7 +1024,7 @@ alloc_new_skb: + err = -EMSGSIZE; + goto error; + } +- get_page(page); ++ net_get_page(page); + skb_fill_page_desc(skb, i, page, sk->sk_sndmsg_off, 0); + frag = &skb_shinfo(skb)->frags[i]; + } +@@ -1182,7 +1182,7 @@ ssize_t ip_append_page(struct sock *sk, + if (skb_can_coalesce(skb, i, page, offset)) { + skb_shinfo(skb)->frags[i-1].size += len; + } else if (i < MAX_SKB_FRAGS) { +- get_page(page); ++ net_get_page(page); + skb_fill_page_desc(skb, i, page, offset, len); + } else { + err = -EMSGSIZE; +diff -upkr linux-2.6.34/net/ipv4/Makefile linux-2.6.34/net/ipv4/Makefile +--- linux-2.6.34/net/ipv4/Makefile 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/net/ipv4/Makefile 2010-05-24 14:51:40.000000000 +0400 +@@ -49,6 +49,7 @@ obj-$(CONFIG_TCP_CONG_LP) += tcp_lp.o + obj-$(CONFIG_TCP_CONG_YEAH) += tcp_yeah.o + obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o + obj-$(CONFIG_NETLABEL) += cipso_ipv4.o ++obj-$(CONFIG_TCP_ZERO_COPY_TRANSFER_COMPLETION_NOTIFICATION) += tcp_zero_copy.o + + obj-$(CONFIG_XFRM) += xfrm4_policy.o xfrm4_state.o xfrm4_input.o \ + xfrm4_output.o +diff -upkr linux-2.6.34/net/ipv4/tcp.c linux-2.6.34/net/ipv4/tcp.c +--- linux-2.6.34/net/ipv4/tcp.c 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/net/ipv4/tcp.c 2010-05-24 14:51:40.000000000 +0400 +@@ -800,7 +800,7 @@ new_segment: + if (can_coalesce) { + skb_shinfo(skb)->frags[i - 1].size += copy; + } else { +- get_page(page); ++ net_get_page(page); + skb_fill_page_desc(skb, i, page, offset, copy); + } + +@@ -1009,7 +1009,7 @@ new_segment: + goto new_segment; + } else if (page) { + if (off == PAGE_SIZE) { +- put_page(page); ++ net_put_page(page); + TCP_PAGE(sk) = page = NULL; + off = 0; + } +@@ -1050,9 +1050,9 @@ new_segment: + } else { + skb_fill_page_desc(skb, i, page, off, copy); + if (TCP_PAGE(sk)) { +- get_page(page); ++ net_get_page(page); + } else if (off + copy < PAGE_SIZE) { +- get_page(page); ++ net_get_page(page); + TCP_PAGE(sk) = page; + } + } +diff -upkr linux-2.6.34/net/ipv4/tcp_output.c linux-2.6.34/net/ipv4/tcp_output.c +--- linux-2.6.34/net/ipv4/tcp_output.c 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/net/ipv4/tcp_output.c 2010-05-24 14:51:40.000000000 +0400 +@@ -1084,7 +1084,7 @@ static void __pskb_trim_head(struct sk_b + k = 0; + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + if (skb_shinfo(skb)->frags[i].size <= eat) { +- put_page(skb_shinfo(skb)->frags[i].page); ++ net_put_page(skb_shinfo(skb)->frags[i].page); + eat -= skb_shinfo(skb)->frags[i].size; + } else { + skb_shinfo(skb)->frags[k] = skb_shinfo(skb)->frags[i]; +diff -upkr linux-2.6.34/net/ipv4/tcp_zero_copy.c linux-2.6.34/net/ipv4/tcp_zero_copy.c +--- linux-2.6.34/net/ipv4/tcp_zero_copy.c 2010-03-01 17:30:31.000000000 +0300 ++++ linux-2.6.34/net/ipv4/tcp_zero_copy.c 2010-05-24 14:51:40.000000000 +0400 +@@ -0,0 +1,49 @@ ++/* ++ * Support routines for TCP zero copy transmit ++ * ++ * Created by Vladislav Bolkhovitin ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * version 2 as published by the Free Software Foundation. ++ */ ++ ++#include <linux/skbuff.h> ++ ++net_get_page_callback_t net_get_page_callback __read_mostly; ++EXPORT_SYMBOL(net_get_page_callback); ++ ++net_put_page_callback_t net_put_page_callback __read_mostly; ++EXPORT_SYMBOL(net_put_page_callback); ++ ++/* ++ * Caller of this function must ensure that at the moment when it's called ++ * there are no pages in the system with net_priv field set to non-zero ++ * value. Hence, this function, as well as net_get_page() and net_put_page(), ++ * don't need any protection. ++ */ ++int net_set_get_put_page_callbacks( ++ net_get_page_callback_t get_callback, ++ net_put_page_callback_t put_callback) ++{ ++ int res = 0; ++ ++ if ((net_get_page_callback != NULL) && (get_callback != NULL) && ++ (net_get_page_callback != get_callback)) { ++ res = -EBUSY; ++ goto out; ++ } ++ ++ if ((net_put_page_callback != NULL) && (put_callback != NULL) && ++ (net_put_page_callback != put_callback)) { ++ res = -EBUSY; ++ goto out; ++ } ++ ++ net_get_page_callback = get_callback; ++ net_put_page_callback = put_callback; ++ ++out: ++ return res; ++} ++EXPORT_SYMBOL(net_set_get_put_page_callbacks); +diff -upkr linux-2.6.34/net/ipv6/ip6_output.c linux-2.6.34/net/ipv6/ip6_output.c +--- linux-2.6.34/net/ipv6/ip6_output.c 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/net/ipv6/ip6_output.c 2010-05-24 14:51:40.000000000 +0400 +@@ -1382,7 +1382,7 @@ alloc_new_skb: + err = -EMSGSIZE; + goto error; + } +- get_page(page); ++ net_get_page(page); + skb_fill_page_desc(skb, i, page, sk->sk_sndmsg_off, 0); + frag = &skb_shinfo(skb)->frags[i]; + } +diff -upkr linux-2.6.34/net/Kconfig linux-2.6.34/net/Kconfig +--- linux-2.6.34/net/Kconfig 2010-05-17 01:17:36.000000000 +0400 ++++ linux-2.6.34/net/Kconfig 2010-05-24 14:51:40.000000000 +0400 +@@ -72,6 +72,18 @@ config INET + + Short answer: say Y. + ++config TCP_ZERO_COPY_TRANSFER_COMPLETION_NOTIFICATION ++ bool "TCP/IP zero-copy transfer completion notification" ++ depends on INET ++ default SCST_ISCSI ++ ---help--- ++ Adds support for sending a notification upon completion of a ++ zero-copy TCP/IP transfer. This can speed up certain TCP/IP ++ software. Currently this is only used by the iSCSI target driver ++ iSCSI-SCST. ++ ++ If unsure, say N. ++ + if INET + source "net/ipv4/Kconfig" + source "net/ipv6/Kconfig" |