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Merged revisions 3672-3675 via svnmerge from

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https://vlnb@scst.svn.sourceforge.net/svnroot/scst/trunk

........
  r3672 | bvassche | 2011-07-10 07:04:49 -0400 (Sun, 10 Jul 2011) | 1 line
  
  fcst: Add a paragraph to the README
........
  r3673 | vlnb | 2011-07-15 23:41:06 -0400 (Fri, 15 Jul 2011) | 3 lines
  
  put_page_callback patch for RHEL61 implemented by Patrick Zwahlen <paz@navixia.com>
........
  r3674 | bvassche | 2011-07-17 07:34:09 -0400 (Sun, 17 Jul 2011) | 1 line
  
  scstadmin: Fix a documentation inconsistency
........
  r3675 | bvassche | 2011-07-17 09:10:39 -0400 (Sun, 17 Jul 2011) | 1 line
  
  scstadmin -list_drv_attr: Do not print the error message "No such driver found" for target drivers without attributes
........


git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/2.1.0.x@3777 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2011-07-27 01:28:31 +00:00
parent 728f8f149e
commit 189fef8e15
3 changed files with 406 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
fcst/README
View File

@@ -9,6 +9,10 @@ are required. Ethernet network adapters that support FCoE are called
Converged Network Adapters (CNA). The standard that makes lossless Ethernet
communication possible is called DCB or Data Center Bridging.
Since FCoE frames are a kind of Ethernet frames, communication between FCoE
clients and servers is limited to a single Ethernet broadcast domain.
Building and Installing
=======================

401
iscsi-scst/kernel/patches/rhel/put_page_callback-rhel61.patch Normal file
View File

@@ -0,0 +1,401 @@
diff -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/include/linux/Kbuild linux-2.6.32-131.4.1.el6.x86_64.new/include/linux/Kbuild
--- linux-2.6.32-131.4.1.el6.x86_64.orig/include/linux/Kbuild 2011-07-09 00:47:13.884215174 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/include/linux/Kbuild 2011-07-09 00:47:47.530389221 +0200
@@ -113,6 +113,7 @@ header-y += map_to_7segment.h
header-y += matroxfb.h
header-y += meye.h
header-y += minix_fs.h
+header-y += mm.h
header-y += mmtimer.h
header-y += mqueue.h
header-y += mtio.h
diff -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/include/linux/mm_types.h linux-2.6.32-131.4.1.el6.x86_64.new/include/linux/mm_types.h
--- linux-2.6.32-131.4.1.el6.x86_64.orig/include/linux/mm_types.h 2011-07-09 00:47:13.893191775 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/include/linux/mm_types.h 2011-07-09 00:47:47.533311169 +0200
@@ -106,6 +106,18 @@ 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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/include/linux/net.h linux-2.6.32-131.4.1.el6.x86_64.new/include/linux/net.h
--- linux-2.6.32-131.4.1.el6.x86_64.orig/include/linux/net.h 2011-07-09 00:47:13.867629724 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/include/linux/net.h 2011-07-09 00:47:47.536207157 +0200
@@ -20,6 +20,7 @@
#include <linux/socket.h>
#include <asm/socket.h>
+#include <linux/mm.h>
#define NPROTO AF_MAX
@@ -365,5 +366,44 @@ static const struct proto_ops name##_ops
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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/core/dev.c linux-2.6.32-131.4.1.el6.x86_64.new/net/core/dev.c
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/core/dev.c 2011-07-09 00:47:14.491417046 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/core/dev.c 2011-07-09 00:47:47.538194361 +0200
@@ -2903,7 +2903,7 @@ 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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/core/skbuff.c linux-2.6.32-131.4.1.el6.x86_64.new/net/core/skbuff.c
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/core/skbuff.c 2011-07-09 00:47:14.491417046 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/core/skbuff.c 2011-07-09 00:47:47.542260687 +0200
@@ -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))
@@ -766,7 +766,7 @@ 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;
}
@@ -832,7 +832,7 @@ 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);
@@ -1106,7 +1106,7 @@ 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);
@@ -1275,7 +1275,7 @@ 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];
@@ -1376,7 +1376,7 @@ 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,
@@ -1400,7 +1400,7 @@ 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;
}
@@ -1410,7 +1410,7 @@ 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;
}
@@ -1431,7 +1431,7 @@ 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;
@@ -2061,7 +2061,7 @@ 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;
@@ -2183,7 +2183,7 @@ 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;
@@ -2205,7 +2205,7 @@ 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 */
@@ -2600,7 +2600,7 @@ 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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/ip_output.c linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/ip_output.c
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/ip_output.c 2011-07-09 00:47:14.538469946 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/ip_output.c 2011-07-09 00:47:47.544855733 +0200
@@ -981,7 +981,7 @@ alloc_new_skb:
err = -EMSGSIZE;
goto error;
}
- get_page(page);
+ net_get_page(page);
skb_fill_page_desc(skb, i, page, off, 0);
frag = &skb_shinfo(skb)->frags[i];
}
@@ -1213,7 +1213,7 @@ 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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/Makefile linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/Makefile
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/Makefile 2011-07-09 00:47:14.540204846 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/Makefile 2011-07-09 00:47:47.544855733 +0200
@@ -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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/tcp.c linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/tcp.c
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/tcp.c 2011-07-09 00:47:14.522494769 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/tcp.c 2011-07-09 00:47:47.548279863 +0200
@@ -799,7 +799,7 @@ 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);
}
@@ -1007,7 +1007,7 @@ 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;
}
@@ -1048,9 +1048,9 @@ 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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/tcp_output.c linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/tcp_output.c
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/tcp_output.c 2011-07-09 00:47:14.535532920 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/tcp_output.c 2011-07-09 00:47:47.548279863 +0200
@@ -909,7 +909,7 @@ 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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/tcp_zero_copy.c linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/tcp_zero_copy.c
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv4/tcp_zero_copy.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv4/tcp_zero_copy.c 2011-07-09 00:47:47.548279863 +0200
@@ -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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv6/ip6_output.c linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv6/ip6_output.c
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/ipv6/ip6_output.c 2011-07-09 00:47:14.498374289 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/ipv6/ip6_output.c 2011-07-09 00:47:47.557327813 +0200
@@ -1370,7 +1370,7 @@ 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 -uNrp linux-2.6.32-131.4.1.el6.x86_64.orig/net/Kconfig linux-2.6.32-131.4.1.el6.x86_64.new/net/Kconfig
--- linux-2.6.32-131.4.1.el6.x86_64.orig/net/Kconfig 2011-07-09 00:47:14.452504858 +0200
+++ linux-2.6.32-131.4.1.el6.x86_64.new/net/Kconfig 2011-07-09 00:47:47.557327813 +0200
@@ -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"

7
scstadmin/scstadmin.sysfs/scstadmin
View File

@@ -16,7 +16,7 @@ Usage:
-h, -help, --help : Show this information.
General Operations
-config <config> : Configure SCST given the specified <file>.
-config <file> : Configure SCST given the specified <file>.
-check_config <file> : Checks the saved configuration <file>.
-write_config <file> : Writes the current configuration to <file>.
-clear_config : Clear all SCST configuration.
@@ -2943,11 +2943,6 @@ sub listDriverAttributes {
return TRUE if issueWarning($SCST->errorString());
if (!scalar(keys %{$attributes})) {
print "No such driver '$driver' found.\n";
return;
}
my $rc = listAttributes($attributes, $nonkey);
return $rc if ($rc);