From 9ab22a69fd10f67ad91c42f8d7ba52c0db276a25 Mon Sep 17 00:00:00 2001 From: Vladislav Bolkhovitin Date: Thu, 20 Feb 2014 05:54:49 +0000 Subject: [PATCH] put_page_callback patch for 3.13.3+ kernels git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5296 d57e44dd-8a1f-0410-8b47-8ef2f437770f --- .../patches/put_page_callback-3.13.3.patch | 403 ++++++++++++++++++ 1 file changed, 403 insertions(+) create mode 100644 iscsi-scst/kernel/patches/put_page_callback-3.13.3.patch diff --git a/iscsi-scst/kernel/patches/put_page_callback-3.13.3.patch b/iscsi-scst/kernel/patches/put_page_callback-3.13.3.patch new file mode 100644 index 000000000..19b900310 --- /dev/null +++ b/iscsi-scst/kernel/patches/put_page_callback-3.13.3.patch @@ -0,0 +1,403 @@ +=== modified file 'drivers/block/drbd/drbd_receiver.c' +--- old/drivers/block/drbd/drbd_receiver.c 2014-02-20 05:26:12 +0000 ++++ new/drivers/block/drbd/drbd_receiver.c 2014-02-20 05:35:42 +0000 +@@ -130,7 +130,7 @@ static int page_chain_free(struct page * + struct page *tmp; + int i = 0; + page_chain_for_each_safe(page, tmp) { +- put_page(page); ++ net_put_page(page); + ++i; + } + return i; + +=== modified file 'drivers/net/vmxnet3/vmxnet3_drv.c' +--- old/drivers/net/vmxnet3/vmxnet3_drv.c 2014-02-20 05:26:12 +0000 ++++ new/drivers/net/vmxnet3/vmxnet3_drv.c 2014-02-20 05:35:42 +0000 +@@ -1369,7 +1369,7 @@ vmxnet3_rq_cleanup(struct vmxnet3_rx_que + rq->buf_info[ring_idx][i].page) { + dma_unmap_page(&adapter->pdev->dev, rxd->addr, + rxd->len, PCI_DMA_FROMDEVICE); +- put_page(rq->buf_info[ring_idx][i].page); ++ net_put_page(rq->buf_info[ring_idx][i].page); + rq->buf_info[ring_idx][i].page = NULL; + } + } + +=== modified file 'drivers/net/xen-netback/netback.c' +--- old/drivers/net/xen-netback/netback.c 2014-02-20 05:26:12 +0000 ++++ new/drivers/net/xen-netback/netback.c 2014-02-20 05:35:42 +0000 +@@ -1080,7 +1080,7 @@ static void xenvif_fill_frags(struct xen + skb->truesize += txp->size; + + /* Take an extra reference to offset xenvif_idx_release */ +- get_page(vif->mmap_pages[pending_idx]); ++ net_get_page(vif->mmap_pages[pending_idx]); + xenvif_idx_release(vif, pending_idx, XEN_NETIF_RSP_OKAY); + } + } +@@ -1760,7 +1760,7 @@ static void xenvif_idx_release(struct xe + + } while (!pending_tx_is_head(vif, peek)); + +- put_page(vif->mmap_pages[pending_idx]); ++ net_put_page(vif->mmap_pages[pending_idx]); + vif->mmap_pages[pending_idx] = NULL; + } + + +=== modified file 'include/linux/mm_types.h' +--- old/include/linux/mm_types.h 2014-02-20 05:26:12 +0000 ++++ new/include/linux/mm_types.h 2014-02-20 05:35:42 +0000 +@@ -195,6 +195,17 @@ struct page { + #ifdef LAST_CPUPID_NOT_IN_PAGE_FLAGS + int _last_cpupid; + #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 + } + /* + * The struct page can be forced to be double word aligned so that atomic ops + +=== modified file 'include/linux/net.h' +--- old/include/linux/net.h 2014-02-20 05:26:12 +0000 ++++ new/include/linux/net.h 2014-02-20 05:35:42 +0000 +@@ -19,6 +19,7 @@ + #define _LINUX_NET_H + + #include ++#include + #include + #include + #include /* For O_CLOEXEC and O_NONBLOCK */ +@@ -295,6 +296,45 @@ int kernel_sendpage(struct socket *sock, + int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg); + int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how); + ++#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 */ ++ + #define MODULE_ALIAS_NETPROTO(proto) \ + MODULE_ALIAS("net-pf-" __stringify(proto)) + + +=== modified file 'include/linux/skbuff.h' +--- old/include/linux/skbuff.h 2014-02-20 05:26:12 +0000 ++++ new/include/linux/skbuff.h 2014-02-20 05:35:42 +0000 +@@ -1974,7 +1974,7 @@ static inline struct page *skb_frag_page + */ + static inline void __skb_frag_ref(skb_frag_t *frag) + { +- get_page(skb_frag_page(frag)); ++ net_get_page(skb_frag_page(frag)); + } + + /** +@@ -1997,7 +1997,7 @@ static inline void skb_frag_ref(struct s + */ + static inline void __skb_frag_unref(skb_frag_t *frag) + { +- put_page(skb_frag_page(frag)); ++ net_put_page(skb_frag_page(frag)); + } + + /** + +=== modified file 'net/Kconfig' +--- old/net/Kconfig 2014-02-20 05:26:12 +0000 ++++ new/net/Kconfig 2014-02-20 05:35:42 +0000 +@@ -75,6 +75,18 @@ 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" + +=== modified file 'net/ceph/pagevec.c' +--- old/net/ceph/pagevec.c 2014-02-20 05:26:12 +0000 ++++ new/net/ceph/pagevec.c 2014-02-20 05:35:42 +0000 +@@ -51,7 +51,7 @@ void ceph_put_page_vector(struct page ** + for (i = 0; i < num_pages; i++) { + if (dirty) + set_page_dirty_lock(pages[i]); +- put_page(pages[i]); ++ net_put_page(pages[i]); + } + kfree(pages); + } + +=== modified file 'net/core/skbuff.c' +--- old/net/core/skbuff.c 2014-02-20 05:26:12 +0000 ++++ new/net/core/skbuff.c 2014-02-20 05:35:42 +0000 +@@ -422,7 +422,7 @@ struct sk_buff *__netdev_alloc_skb(struc + if (likely(data)) { + skb = build_skb(data, fragsz); + if (unlikely(!skb)) +- put_page(virt_to_head_page(data)); ++ net_put_page(virt_to_head_page(data)); + } + } else { + skb = __alloc_skb(length + NET_SKB_PAD, gfp_mask, +@@ -480,7 +480,7 @@ static void skb_clone_fraglist(struct sk + static void skb_free_head(struct sk_buff *skb) + { + if (skb->head_frag) +- put_page(virt_to_head_page(skb->head)); ++ net_put_page(virt_to_head_page(skb->head)); + else + kfree(skb->head); + } +@@ -805,7 +805,7 @@ int skb_copy_ubufs(struct sk_buff *skb, + if (!page) { + while (head) { + struct page *next = (struct page *)page_private(head); +- put_page(head); ++ net_put_page(head); + head = next; + } + return -ENOMEM; +@@ -1648,7 +1648,7 @@ 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 struct page *linear_to_page(struct page *page, unsigned int *len, +@@ -1701,7 +1701,7 @@ static bool spd_fill_page(struct splice_ + spd->partial[spd->nr_pages - 1].len += *len; + return false; + } +- get_page(page); ++ net_get_page(page); + spd->pages[spd->nr_pages] = page; + spd->partial[spd->nr_pages].len = *len; + spd->partial[spd->nr_pages].offset = offset; +@@ -2716,7 +2716,7 @@ int skb_append_datato_frags(struct sock + copy); + frg_cnt++; + pfrag->offset += copy; +- get_page(pfrag->page); ++ net_get_page(pfrag->page); + + skb->truesize += copy; + atomic_add(copy, &sk->sk_wmem_alloc); + +=== modified file 'net/core/sock.c' +--- old/net/core/sock.c 2014-02-20 05:26:12 +0000 ++++ new/net/core/sock.c 2014-02-20 05:35:42 +0000 +@@ -1862,7 +1862,7 @@ bool skb_page_frag_refill(unsigned int s + } + if (pfrag->offset + sz <= pfrag->size) + return true; +- put_page(pfrag->page); ++ net_put_page(pfrag->page); + } + + /* We restrict high order allocations to users that can afford to wait */ +@@ -2624,7 +2624,7 @@ void sk_common_release(struct sock *sk) + sk_refcnt_debug_release(sk); + + if (sk->sk_frag.page) { +- put_page(sk->sk_frag.page); ++ net_put_page(sk->sk_frag.page); + sk->sk_frag.page = NULL; + } + + +=== modified file 'net/ipv4/Makefile' +--- old/net/ipv4/Makefile 2014-02-20 05:26:12 +0000 ++++ new/net/ipv4/Makefile 2014-02-20 05:35:42 +0000 +@@ -53,6 +53,7 @@ obj-$(CONFIG_TCP_CONG_YEAH) += tcp_yeah. + obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o + obj-$(CONFIG_MEMCG_KMEM) += tcp_memcontrol.o + obj-$(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 + +=== modified file 'net/ipv4/ip_output.c' +--- old/net/ipv4/ip_output.c 2014-02-20 05:26:12 +0000 ++++ new/net/ipv4/ip_output.c 2014-02-20 05:35:42 +0000 +@@ -1005,7 +1005,7 @@ alloc_new_skb: + __skb_fill_page_desc(skb, i, pfrag->page, + pfrag->offset, 0); + skb_shinfo(skb)->nr_frags = ++i; +- get_page(pfrag->page); ++ net_get_page(pfrag->page); + } + copy = min_t(int, copy, pfrag->size - pfrag->offset); + if (getfrag(from, +@@ -1231,7 +1231,7 @@ ssize_t ip_append_page(struct sock *sk, + if (skb_can_coalesce(skb, i, page, offset)) { + skb_frag_size_add(&skb_shinfo(skb)->frags[i-1], 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; + +=== modified file 'net/ipv4/tcp.c' +--- old/net/ipv4/tcp.c 2014-02-20 05:26:12 +0000 ++++ new/net/ipv4/tcp.c 2014-02-20 05:35:42 +0000 +@@ -898,7 +898,7 @@ new_segment: + if (can_coalesce) { + skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], copy); + } else { +- get_page(page); ++ net_get_page(page); + skb_fill_page_desc(skb, i, page, offset, copy); + } + skb_shinfo(skb)->tx_flags |= SKBTX_SHARED_FRAG; +@@ -1194,7 +1194,7 @@ new_segment: + } else { + skb_fill_page_desc(skb, i, pfrag->page, + pfrag->offset, copy); +- get_page(pfrag->page); ++ net_get_page(pfrag->page); + } + pfrag->offset += copy; + } + +=== added file 'net/ipv4/tcp_zero_copy.c' +--- old/net/ipv4/tcp_zero_copy.c 1970-01-01 00:00:00 +0000 ++++ new/net/ipv4/tcp_zero_copy.c 2014-02-20 05:35:42 +0000 +@@ -0,0 +1,50 @@ ++/* ++ * 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 ++#include ++ ++net_get_page_callback_t net_get_page_callback __read_mostly; ++EXPORT_SYMBOL_GPL(net_get_page_callback); ++ ++net_put_page_callback_t net_put_page_callback __read_mostly; ++EXPORT_SYMBOL_GPL(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_GPL(net_set_get_put_page_callbacks); + +=== modified file 'net/ipv6/ip6_output.c' +--- old/net/ipv6/ip6_output.c 2014-02-20 05:26:12 +0000 ++++ new/net/ipv6/ip6_output.c 2014-02-20 05:35:42 +0000 +@@ -1431,7 +1431,7 @@ alloc_new_skb: + __skb_fill_page_desc(skb, i, pfrag->page, + pfrag->offset, 0); + skb_shinfo(skb)->nr_frags = ++i; +- get_page(pfrag->page); ++ net_get_page(pfrag->page); + } + copy = min_t(int, copy, pfrag->size - pfrag->offset); + if (getfrag(from, + +=== modified file 'net/netfilter/nfnetlink_queue_core.c' +--- old/net/netfilter/nfnetlink_queue_core.c 2014-02-20 05:26:12 +0000 ++++ new/net/netfilter/nfnetlink_queue_core.c 2014-02-20 05:35:42 +0000 +@@ -258,7 +258,7 @@ nfqnl_zcopy(struct sk_buff *to, const st + page = virt_to_head_page(from->head); + offset = from->data - (unsigned char *)page_address(page); + __skb_fill_page_desc(to, 0, page, offset, plen); +- get_page(page); ++ net_get_page(page); + j = 1; + len -= plen; + } +