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authorDavide Libenzi <davidel@xmailserver.org>2006-03-25 03:07:39 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 08:22:56 -0800
commitf348d70a324e15afc701a494f32ec468abb7d1eb (patch)
treea4cb43429f7f08a6621c581bd99e4a03198e8c67 /include
parent501f2499b897ca4be68b1acc7a4bc8cf66f5fd24 (diff)
downloadop-kernel-dev-f348d70a324e15afc701a494f32ec468abb7d1eb.zip
op-kernel-dev-f348d70a324e15afc701a494f32ec468abb7d1eb.tar.gz
[PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications
Implement the half-closed devices notifiation, by adding a new POLLRDHUP (and its alias EPOLLRDHUP) bit to the existing poll/select sets. Since the existing POLLHUP handling, that does not report correctly half-closed devices, was feared to be changed, this implementation leaves the current POLLHUP reporting unchanged and simply add a new bit that is set in the few places where it makes sense. The same thing was discussed and conceptually agreed quite some time ago: http://lkml.org/lkml/2003/7/12/116 Since this new event bit is added to the existing Linux poll infrastruture, even the existing poll/select system calls will be able to use it. As far as the existing POLLHUP handling, the patch leaves it as is. The pollrdhup-2.6.16.rc5-0.10.diff defines the POLLRDHUP for all the existing archs and sets the bit in the six relevant files. The other attached diff is the simple change required to sys/epoll.h to add the EPOLLRDHUP definition. There is "a stupid program" to test POLLRDHUP delivery here: http://www.xmailserver.org/pollrdhup-test.c It tests poll(2), but since the delivery is same epoll(2) will work equally. Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-alpha/poll.h2
-rw-r--r--include/asm-arm/poll.h1
-rw-r--r--include/asm-arm26/poll.h1
-rw-r--r--include/asm-cris/poll.h1
-rw-r--r--include/asm-frv/poll.h1
-rw-r--r--include/asm-h8300/poll.h1
-rw-r--r--include/asm-i386/poll.h1
-rw-r--r--include/asm-ia64/poll.h1
-rw-r--r--include/asm-m32r/poll.h1
-rw-r--r--include/asm-m68k/poll.h1
-rw-r--r--include/asm-mips/poll.h1
-rw-r--r--include/asm-parisc/poll.h1
-rw-r--r--include/asm-powerpc/poll.h1
-rw-r--r--include/asm-s390/poll.h1
-rw-r--r--include/asm-sh/poll.h1
-rw-r--r--include/asm-sh64/poll.h1
-rw-r--r--include/asm-sparc/poll.h1
-rw-r--r--include/asm-sparc64/poll.h1
-rw-r--r--include/asm-v850/poll.h1
-rw-r--r--include/asm-x86_64/poll.h1
-rw-r--r--include/asm-xtensa/poll.h1
21 files changed, 22 insertions, 0 deletions
diff --git a/include/asm-alpha/poll.h b/include/asm-alpha/poll.h
index 34f333b..9570718 100644
--- a/include/asm-alpha/poll.h
+++ b/include/asm-alpha/poll.h
@@ -13,6 +13,8 @@
#define POLLWRBAND (1 << 9)
#define POLLMSG (1 << 10)
#define POLLREMOVE (1 << 11)
+#define POLLRDHUP (1 << 12)
+
struct pollfd {
int fd;
diff --git a/include/asm-arm/poll.h b/include/asm-arm/poll.h
index 2744ca8..5030b2b 100644
--- a/include/asm-arm/poll.h
+++ b/include/asm-arm/poll.h
@@ -16,6 +16,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-arm26/poll.h b/include/asm-arm26/poll.h
index fdfdab0..9ccb7f4 100644
--- a/include/asm-arm26/poll.h
+++ b/include/asm-arm26/poll.h
@@ -15,6 +15,7 @@
#define POLLWRNORM 0x0100
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-cris/poll.h b/include/asm-cris/poll.h
index 1c0efc3..1b25d4c 100644
--- a/include/asm-cris/poll.h
+++ b/include/asm-cris/poll.h
@@ -15,6 +15,7 @@
#define POLLWRBAND 512
#define POLLMSG 1024
#define POLLREMOVE 4096
+#define POLLRDHUP 8192
struct pollfd {
int fd;
diff --git a/include/asm-frv/poll.h b/include/asm-frv/poll.h
index 8cbcd60..c8fe880 100644
--- a/include/asm-frv/poll.h
+++ b/include/asm-frv/poll.h
@@ -12,6 +12,7 @@
#define POLLRDBAND 128
#define POLLWRBAND 256
#define POLLMSG 0x0400
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-h8300/poll.h b/include/asm-h8300/poll.h
index bf49ab8..fc52103 100644
--- a/include/asm-h8300/poll.h
+++ b/include/asm-h8300/poll.h
@@ -12,6 +12,7 @@
#define POLLRDBAND 128
#define POLLWRBAND 256
#define POLLMSG 0x0400
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-i386/poll.h b/include/asm-i386/poll.h
index aecc80a..2cd4929 100644
--- a/include/asm-i386/poll.h
+++ b/include/asm-i386/poll.h
@@ -16,6 +16,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-ia64/poll.h b/include/asm-ia64/poll.h
index 160258a..bcaf9f1 100644
--- a/include/asm-ia64/poll.h
+++ b/include/asm-ia64/poll.h
@@ -21,6 +21,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-m32r/poll.h b/include/asm-m32r/poll.h
index 43b7acf..9e0e700 100644
--- a/include/asm-m32r/poll.h
+++ b/include/asm-m32r/poll.h
@@ -21,6 +21,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-m68k/poll.h b/include/asm-m68k/poll.h
index c4b69c4..0fb8843 100644
--- a/include/asm-m68k/poll.h
+++ b/include/asm-m68k/poll.h
@@ -13,6 +13,7 @@
#define POLLWRBAND 256
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-mips/poll.h b/include/asm-mips/poll.h
index a000f1f..70881f8 100644
--- a/include/asm-mips/poll.h
+++ b/include/asm-mips/poll.h
@@ -17,6 +17,7 @@
/* These seem to be more or less nonstandard ... */
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-parisc/poll.h b/include/asm-parisc/poll.h
index 1c1da86..20e4d03 100644
--- a/include/asm-parisc/poll.h
+++ b/include/asm-parisc/poll.h
@@ -16,6 +16,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-powerpc/poll.h b/include/asm-powerpc/poll.h
index edd2054..9c7d126 100644
--- a/include/asm-powerpc/poll.h
+++ b/include/asm-powerpc/poll.h
@@ -13,6 +13,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-s390/poll.h b/include/asm-s390/poll.h
index e90a5ca..6f7f65a 100644
--- a/include/asm-s390/poll.h
+++ b/include/asm-s390/poll.h
@@ -24,6 +24,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-sh/poll.h b/include/asm-sh/poll.h
index 52f95b9..dbca9b3 100644
--- a/include/asm-sh/poll.h
+++ b/include/asm-sh/poll.h
@@ -16,6 +16,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-sh64/poll.h b/include/asm-sh64/poll.h
index a420d14..3a6cbad 100644
--- a/include/asm-sh64/poll.h
+++ b/include/asm-sh64/poll.h
@@ -26,6 +26,7 @@
#define POLLWRNORM 0x0100
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-sparc/poll.h b/include/asm-sparc/poll.h
index 3ddcc64..26f13fb 100644
--- a/include/asm-sparc/poll.h
+++ b/include/asm-sparc/poll.h
@@ -13,6 +13,7 @@
#define POLLWRBAND 256
#define POLLMSG 512
#define POLLREMOVE 1024
+#define POLLRDHUP 2048
struct pollfd {
int fd;
diff --git a/include/asm-sparc64/poll.h b/include/asm-sparc64/poll.h
index 31b611a..ab6b0d1 100644
--- a/include/asm-sparc64/poll.h
+++ b/include/asm-sparc64/poll.h
@@ -13,6 +13,7 @@
#define POLLWRBAND 256
#define POLLMSG 512
#define POLLREMOVE 1024
+#define POLLRDHUP 2048
struct pollfd {
int fd;
diff --git a/include/asm-v850/poll.h b/include/asm-v850/poll.h
index 0369562..c10176c 100644
--- a/include/asm-v850/poll.h
+++ b/include/asm-v850/poll.h
@@ -13,6 +13,7 @@
#define POLLWRBAND 0x0100
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-x86_64/poll.h b/include/asm-x86_64/poll.h
index c43cbba..c0475a9 100644
--- a/include/asm-x86_64/poll.h
+++ b/include/asm-x86_64/poll.h
@@ -16,6 +16,7 @@
#define POLLWRBAND 0x0200
#define POLLMSG 0x0400
#define POLLREMOVE 0x1000
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
diff --git a/include/asm-xtensa/poll.h b/include/asm-xtensa/poll.h
index dffe447..6fd9477 100644
--- a/include/asm-xtensa/poll.h
+++ b/include/asm-xtensa/poll.h
@@ -27,6 +27,7 @@
#define POLLMSG 0x0400
#define POLLREMOVE 0x0800
+#define POLLRDHUP 0x2000
struct pollfd {
int fd;
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