This is the 4th version of Linux LibOS patchset which reflects a couple of comments received from people. changes from v3: - Patch 09/10 ("lib: libos build scripts and documentation") 1) Remove RFC (now it's a proposal) 2) build environment cleanup (commented by Paul Bolle) - Overall 3) change based tree from arnd/asm-generic to torvalds/linux.git (commented by Richard Weinberger) 4) rebased to Linux 4.1-rc1 (b787f68c36d49bb1d9236f403813641efa74a031) 5) change the title of cover letter a bit changes from v2: - Patch 02/11 ("slab: add private memory allocator header for arch/lib") 1) add new allocator named SLIB (Library Allocator): Patch 04/11 is integrated to 02 (commented by Christoph Lameter) - Overall 2) rewrite commit log messages changes from v1: - Patch 01/11 ("sysctl: make some functions unstatic to access by arch/lib"): 1) add prefix ctl_table_ to newly publiced functions (commented by Joe Perches) - Patch 08/11 ("lib: other kernel glue layer code"): 2) significantly reduce glue codes (stubs) (commented by Richard Weinberger) - Others 3) adapt to linux-4.0.0 4) detect make dependency by Kbuild .cmd files patchset history ----------------- [v3] : https://lkml.org/lkml/2015/4/19/63 [v2] : https://lkml.org/lkml/2015/4/17/140 [v1] : https://lkml.org/lkml/2015/3/24/254 This is an introduction of Linux library operating system (LibOS). Our objective is to build the kernel network stack as a shared library that can be linked to by userspace programs to provide network stack personalization and testing facilities, and allow researchers to more easily simulate complex network topologies of linux routers/hosts. Although the architecture itself can virtualize various things, the current design only focuses on the network stack. You can benefit network stack feature such as TCP, UDP, SCTP, DCCP (IPv4 and IPv6), Mobie IPv6, Multipath TCP (IPv4/IPv6, out-of-tree at the present moment), and netlink with various userspace applications (quagga, iproute2, iperf, wget, and thttpd). == What is LibOS ? == The library exposes an entry point as API, which is lib_init(), in order to connect userspace applications to the (userspace-version) kernel network stack. The clock source, virtual struct net_device, and scheduler are provided by caller while kernel resource like system calls is provided by callee. Once the LibOS is initialized via the API, userspace applications with POSIX socket can use the system calls defined in LibOS by replacing from the original socket-related symbols to the LibOS-specific one. Then application can benefit the network stack of LibOS without involving the host network stack. Currently, there are two users of LibOS: Network Stack in Userspace (NUSE) and ns-3 network simulatior with Direct Code Execution (DCE). These codes are managed at an external repository(*1). == How to use it ? == to build the library, % make {defconfig,menuconfig} ARCH=lib then, build it. % make library ARCH=lib You will see liblinux-$(KERNELVERSION).so in the top directory. == More information == The crucial difference between UML (user-mode linux) and this approach is that we allow multiple network stack instances to co-exist within a single process with dlmopen(3) like linking for easy debugging. These patches are also available on this branch: git://github.com/libos-nuse/net-next-nuse.git for-linus-upstream-libos-v4 (based on the commit b787f68c36d49bb1d9236f403813641efa74a031 of torvalds/linux.git) For further information, here is a slideset presented at the last netdev0.1 conference. http://www.slideshare.net/hajimetazaki/library-operating-system-for-linux-netdev01 I would appreciate any kind of your feedback regarding to upstream this feature. *1 https://github.com/libos-nuse/linux-libos-tools Hajime Tazaki (10): sysctl: make some functions unstatic to access by arch/lib slab: add SLIB (Library memory allocator) for arch/lib lib: public headers and API implementations for userspace programs lib: time handling (kernel glue code) lib: context and scheduling functions (kernel glue code) for libos lib: sysctl handling (kernel glue code) lib: other kernel glue layer code lib: auxially files for auto-generated asm-generic files of libos lib: libos build scripts and documentation lib: tools used for test scripts Documentation/virtual/libos-howto.txt | 144 ++++++++ MAINTAINERS | 9 + arch/lib/.gitignore | 3 + arch/lib/Kconfig | 124 +++++++ arch/lib/Makefile | 224 ++++++++++++ arch/lib/Makefile.print | 45 +++ arch/lib/capability.c | 25 ++ arch/lib/defconfig | 653 ++++++++++++++++++++++++++++++++++ arch/lib/filemap.c | 32 ++ arch/lib/fs.c | 70 ++++ arch/lib/generate-linker-script.py | 50 +++ arch/lib/glue.c | 289 +++++++++++++++ arch/lib/hrtimer.c | 122 +++++++ arch/lib/include/asm/Kbuild | 57 +++ arch/lib/include/asm/atomic.h | 50 +++ arch/lib/include/asm/barrier.h | 8 + arch/lib/include/asm/bitsperlong.h | 16 + arch/lib/include/asm/current.h | 7 + arch/lib/include/asm/elf.h | 10 + arch/lib/include/asm/hardirq.h | 8 + arch/lib/include/asm/page.h | 14 + arch/lib/include/asm/pgtable.h | 30 ++ arch/lib/include/asm/processor.h | 19 + arch/lib/include/asm/ptrace.h | 4 + arch/lib/include/asm/segment.h | 6 + arch/lib/include/asm/sembuf.h | 4 + arch/lib/include/asm/shmbuf.h | 4 + arch/lib/include/asm/shmparam.h | 4 + arch/lib/include/asm/sigcontext.h | 6 + arch/lib/include/asm/stat.h | 4 + arch/lib/include/asm/statfs.h | 4 + arch/lib/include/asm/swab.h | 7 + arch/lib/include/asm/thread_info.h | 36 ++ arch/lib/include/asm/uaccess.h | 14 + arch/lib/include/asm/unistd.h | 4 + arch/lib/include/sim-assert.h | 23 ++ arch/lib/include/sim-init.h | 134 +++++++ arch/lib/include/sim-printf.h | 13 + arch/lib/include/sim-types.h | 53 +++ arch/lib/include/sim.h | 51 +++ arch/lib/include/uapi/asm/byteorder.h | 6 + arch/lib/lib-device.c | 187 ++++++++++ arch/lib/lib-socket.c | 410 +++++++++++++++++++++ arch/lib/lib.c | 294 +++++++++++++++ arch/lib/lib.h | 21 ++ arch/lib/modules.c | 36 ++ arch/lib/pid.c | 29 ++ arch/lib/print.c | 56 +++ arch/lib/proc.c | 34 ++ arch/lib/random.c | 53 +++ arch/lib/sched.c | 406 +++++++++++++++++++++ arch/lib/softirq.c | 108 ++++++ arch/lib/sysctl.c | 270 ++++++++++++++ arch/lib/sysfs.c | 83 +++++ arch/lib/tasklet-hrtimer.c | 57 +++ arch/lib/tasklet.c | 76 ++++ arch/lib/time.c | 144 ++++++++ arch/lib/timer.c | 238 +++++++++++++ arch/lib/vmscan.c | 26 ++ arch/lib/workqueue.c | 242 +++++++++++++ fs/proc/proc_sysctl.c | 36 +- include/linux/slab.h | 6 +- include/linux/slib_def.h | 21 ++ mm/Makefile | 1 + mm/slab.h | 4 + mm/slib.c | 205 +++++++++++ tools/testing/libos/.gitignore | 6 + tools/testing/libos/Makefile | 38 ++ tools/testing/libos/README | 15 + tools/testing/libos/bisect.sh | 10 + tools/testing/libos/dce-test.sh | 23 ++ tools/testing/libos/nuse-test.sh | 57 +++ 72 files changed, 5560 insertions(+), 18 deletions(-) create mode 100644 Documentation/virtual/libos-howto.txt create mode 100644 arch/lib/.gitignore create mode 100644 arch/lib/Kconfig create mode 100644 arch/lib/Makefile create mode 100644 arch/lib/Makefile.print create mode 100644 arch/lib/capability.c create mode 100644 arch/lib/defconfig create mode 100644 arch/lib/filemap.c create mode 100644 arch/lib/fs.c create mode 100755 arch/lib/generate-linker-script.py create mode 100644 arch/lib/glue.c create mode 100644 arch/lib/hrtimer.c create mode 100644 arch/lib/include/asm/Kbuild create mode 100644 arch/lib/include/asm/atomic.h create mode 100644 arch/lib/include/asm/barrier.h create mode 100644 arch/lib/include/asm/bitsperlong.h create mode 100644 arch/lib/include/asm/current.h create mode 100644 arch/lib/include/asm/elf.h create mode 100644 arch/lib/include/asm/hardirq.h create mode 100644 arch/lib/include/asm/page.h create mode 100644 arch/lib/include/asm/pgtable.h create mode 100644 arch/lib/include/asm/processor.h create mode 100644 arch/lib/include/asm/ptrace.h create mode 100644 arch/lib/include/asm/segment.h create mode 100644 arch/lib/include/asm/sembuf.h create mode 100644 arch/lib/include/asm/shmbuf.h create mode 100644 arch/lib/include/asm/shmparam.h create mode 100644 arch/lib/include/asm/sigcontext.h create mode 100644 arch/lib/include/asm/stat.h create mode 100644 arch/lib/include/asm/statfs.h create mode 100644 arch/lib/include/asm/swab.h create mode 100644 arch/lib/include/asm/thread_info.h create mode 100644 arch/lib/include/asm/uaccess.h create mode 100644 arch/lib/include/asm/unistd.h create mode 100644 arch/lib/include/sim-assert.h create mode 100644 arch/lib/include/sim-init.h create mode 100644 arch/lib/include/sim-printf.h create mode 100644 arch/lib/include/sim-types.h create mode 100644 arch/lib/include/sim.h create mode 100644 arch/lib/include/uapi/asm/byteorder.h create mode 100644 arch/lib/lib-device.c create mode 100644 arch/lib/lib-socket.c create mode 100644 arch/lib/lib.c create mode 100644 arch/lib/lib.h create mode 100644 arch/lib/modules.c create mode 100644 arch/lib/pid.c create mode 100644 arch/lib/print.c create mode 100644 arch/lib/proc.c create mode 100644 arch/lib/random.c create mode 100644 arch/lib/sched.c create mode 100644 arch/lib/softirq.c create mode 100644 arch/lib/sysctl.c create mode 100644 arch/lib/sysfs.c create mode 100644 arch/lib/tasklet-hrtimer.c create mode 100644 arch/lib/tasklet.c create mode 100644 arch/lib/time.c create mode 100644 arch/lib/timer.c create mode 100644 arch/lib/vmscan.c create mode 100644 arch/lib/workqueue.c create mode 100644 include/linux/slib_def.h create mode 100644 mm/slib.c create mode 100644 tools/testing/libos/.gitignore create mode 100644 tools/testing/libos/Makefile create mode 100644 tools/testing/libos/README create mode 100755 tools/testing/libos/bisect.sh create mode 100755 tools/testing/libos/dce-test.sh create mode 100755 tools/testing/libos/nuse-test.sh -- 2.1.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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