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authorJens Axboe <axboe@suse.de>2006-03-30 15:15:30 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-30 12:28:18 -0800
commit5274f052e7b3dbd81935772eb551dfd0325dfa9d (patch)
treec79f813ec513660edb6f1e4a75cb366c6b84f53f /arch
parent5d4fe2c1ce83c3e967ccc1ba3d580c1a5603a866 (diff)
downloadop-kernel-dev-5274f052e7b3dbd81935772eb551dfd0325dfa9d.zip
op-kernel-dev-5274f052e7b3dbd81935772eb551dfd0325dfa9d.tar.gz
[PATCH] Introduce sys_splice() system call
This adds support for the sys_splice system call. Using a pipe as a transport, it can connect to files or sockets (latter as output only). From the splice.c comments: "splice": joining two ropes together by interweaving their strands. This is the "extended pipe" functionality, where a pipe is used as an arbitrary in-memory buffer. Think of a pipe as a small kernel buffer that you can use to transfer data from one end to the other. The traditional unix read/write is extended with a "splice()" operation that transfers data buffers to or from a pipe buffer. Named by Larry McVoy, original implementation from Linus, extended by Jens to support splicing to files and fixing the initial implementation bugs. Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/syscall_table.S1
-rw-r--r--arch/ia64/kernel/entry.S1
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/i386/kernel/syscall_table.S b/arch/i386/kernel/syscall_table.S
index 326595f..ce3ef4f 100644
--- a/arch/i386/kernel/syscall_table.S
+++ b/arch/i386/kernel/syscall_table.S
@@ -312,3 +312,4 @@ ENTRY(sys_call_table)
.long sys_unshare /* 310 */
.long sys_set_robust_list
.long sys_get_robust_list
+ .long sys_splice
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 0e3eda9..750e8e7 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1605,5 +1605,6 @@ sys_call_table:
data8 sys_ni_syscall // reserved for pselect
data8 sys_ni_syscall // 1295 reserved for ppoll
data8 sys_unshare
+ data8 sys_splice
.org sys_call_table + 8*NR_syscalls // guard against failures to increase NR_syscalls
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