Update UML target to 3.10 and various improvements

Updated target to 3.10.36.
Added mconsole exec patch.
Added pseudo-random MAC patch (from NetKit).

Signed-off-by: Markus Stenberg <markus.stenberg@iki.fi>
Reviewed-by: Steven Barth <steven@midlink.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41172 3c298f89-4303-0410-b956-a3cf2f4a3e73

4 files changed, 576 insertions, 0 deletions

diff --git a/target/linux/uml/patches-3.10/001-fix_make_headers_install.patch b/target/linux/uml/patches-3.10/001-fix_make_headers_install.patch
new file mode 100644
index 0000000000..0f872c0ec2
--- /dev/null
+++ b/target/linux/uml/patches-3.10/001-fix_make_headers_install.patch
@@ -0,0 +1,213 @@
+From faec6b6c2cc0219e74569c13f581fc11d8f3fc57 Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <florian@openwrt.org>
+Date: Sun, 17 Mar 2013 20:12:10 +0100
+Subject: [PATCH] UM: fix make headers_install after UAPI header installation
+
+Commit 10b63956 (UAPI: Plumb the UAPI Kbuilds into the user
+header installation and checking) breaks UML make headers_install with
+the following:
+
+$ ARCH=um make headers_install
+  CHK     include/generated/uapi/linux/version.h
+  UPD     include/generated/uapi/linux/version.h
+  HOSTCC  scripts/basic/fixdep
+  WRAP    arch/um/include/generated/asm/bug.h
+[snip]
+  WRAP    arch/um/include/generated/asm/trace_clock.h
+  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_32.h
+  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_64.h
+  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_x32.h
+  SYSTBL  arch/x86/syscalls/../include/generated/asm/syscalls_32.h
+  HOSTCC  scripts/unifdef
+Makefile:912: *** Headers not exportable for the um architecture.  Stop.
+zsh: exit 2     ARCH=um make headers_install
+
+The reason for that is because the top-level Makefile does the
+following:
+        $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
+          $(error Headers not exportable for the $(SRCARCH) architecture))
+
+we end-up in the else part of the $(if) statement because UML still uses
+the old path in arch/um/include/asm/Kbuild. This patch fixes the issue
+by moving the header files to be in arch/um/include/uapi/asm/ thus
+making headers_install (and other make targets checking for uapi) to
+succeed.
+
+Signed-off-by: Florian Fainelli <florian@openwrt.org>
+---
+Richard, this has been broken for 3.7+ onwards, if you want me to send
+you separate patches for 3.7 and 3.8 let me know. Thanks!
+
+ arch/um/include/{ => uapi}/asm/Kbuild              |    0
+ arch/um/include/{ => uapi}/asm/a.out-core.h        |    0
+ arch/um/include/{ => uapi}/asm/bugs.h              |    0
+ arch/um/include/{ => uapi}/asm/cache.h             |    0
+ arch/um/include/{ => uapi}/asm/common.lds.S        |    0
+ arch/um/include/{ => uapi}/asm/dma.h               |    0
+ arch/um/include/{ => uapi}/asm/fixmap.h            |    0
+ arch/um/include/{ => uapi}/asm/irq.h               |    0
+ arch/um/include/{ => uapi}/asm/irqflags.h          |    0
+ arch/um/include/{ => uapi}/asm/kmap_types.h        |    0
+ arch/um/include/{ => uapi}/asm/kvm_para.h          |    0
+ arch/um/include/{ => uapi}/asm/mmu.h               |    0
+ arch/um/include/{ => uapi}/asm/mmu_context.h       |    0
+ arch/um/include/{ => uapi}/asm/page.h              |    0
+ arch/um/include/{ => uapi}/asm/pgalloc.h           |    0
+ arch/um/include/{ => uapi}/asm/pgtable-2level.h    |    0
+ arch/um/include/{ => uapi}/asm/pgtable-3level.h    |    0
+ arch/um/include/{ => uapi}/asm/pgtable.h           |    0
+ arch/um/include/{ => uapi}/asm/processor-generic.h |    0
+ arch/um/include/{ => uapi}/asm/ptrace-generic.h    |    0
+ arch/um/include/{ => uapi}/asm/setup.h             |    0
+ arch/um/include/{ => uapi}/asm/smp.h               |    0
+ arch/um/include/{ => uapi}/asm/sysrq.h             |    0
+ arch/um/include/{ => uapi}/asm/thread_info.h       |    0
+ arch/um/include/{ => uapi}/asm/timex.h             |    0
+ arch/um/include/{ => uapi}/asm/tlb.h               |    0
+ arch/um/include/{ => uapi}/asm/tlbflush.h          |    0
+ arch/um/include/{ => uapi}/asm/uaccess.h           |    0
+ 28 files changed, 0 insertions(+), 0 deletions(-)
+ rename arch/um/include/{ => uapi}/asm/Kbuild (100%)
+ rename arch/um/include/{ => uapi}/asm/a.out-core.h (100%)
+ rename arch/um/include/{ => uapi}/asm/bugs.h (100%)
+ rename arch/um/include/{ => uapi}/asm/cache.h (100%)
+ rename arch/um/include/{ => uapi}/asm/common.lds.S (100%)
+ rename arch/um/include/{ => uapi}/asm/dma.h (100%)
+ rename arch/um/include/{ => uapi}/asm/fixmap.h (100%)
+ rename arch/um/include/{ => uapi}/asm/irq.h (100%)
+ rename arch/um/include/{ => uapi}/asm/irqflags.h (100%)
+ rename arch/um/include/{ => uapi}/asm/kmap_types.h (100%)
+ rename arch/um/include/{ => uapi}/asm/kvm_para.h (100%)
+ rename arch/um/include/{ => uapi}/asm/mmu.h (100%)
+ rename arch/um/include/{ => uapi}/asm/mmu_context.h (100%)
+ rename arch/um/include/{ => uapi}/asm/page.h (100%)
+ rename arch/um/include/{ => uapi}/asm/pgalloc.h (100%)
+ rename arch/um/include/{ => uapi}/asm/pgtable-2level.h (100%)
+ rename arch/um/include/{ => uapi}/asm/pgtable-3level.h (100%)
+ rename arch/um/include/{ => uapi}/asm/pgtable.h (100%)
+ rename arch/um/include/{ => uapi}/asm/processor-generic.h (100%)
+ rename arch/um/include/{ => uapi}/asm/ptrace-generic.h (100%)
+ rename arch/um/include/{ => uapi}/asm/setup.h (100%)
+ rename arch/um/include/{ => uapi}/asm/smp.h (100%)
+ rename arch/um/include/{ => uapi}/asm/sysrq.h (100%)
+ rename arch/um/include/{ => uapi}/asm/thread_info.h (100%)
+ rename arch/um/include/{ => uapi}/asm/timex.h (100%)
+ rename arch/um/include/{ => uapi}/asm/tlb.h (100%)
+ rename arch/um/include/{ => uapi}/asm/tlbflush.h (100%)
+ rename arch/um/include/{ => uapi}/asm/uaccess.h (100%)
+
+diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/uapi/asm/Kbuild
+similarity index 100%
+rename from arch/um/include/asm/Kbuild
+rename to arch/um/include/uapi/asm/Kbuild
+diff --git a/arch/um/include/asm/a.out-core.h b/arch/um/include/uapi/asm/a.out-core.h
+similarity index 100%
+rename from arch/um/include/asm/a.out-core.h
+rename to arch/um/include/uapi/asm/a.out-core.h
+diff --git a/arch/um/include/asm/bugs.h b/arch/um/include/uapi/asm/bugs.h
+similarity index 100%
+rename from arch/um/include/asm/bugs.h
+rename to arch/um/include/uapi/asm/bugs.h
+diff --git a/arch/um/include/asm/cache.h b/arch/um/include/uapi/asm/cache.h
+similarity index 100%
+rename from arch/um/include/asm/cache.h
+rename to arch/um/include/uapi/asm/cache.h
+diff --git a/arch/um/include/asm/common.lds.S b/arch/um/include/uapi/asm/common.lds.S
+similarity index 100%
+rename from arch/um/include/asm/common.lds.S
+rename to arch/um/include/uapi/asm/common.lds.S
+diff --git a/arch/um/include/asm/dma.h b/arch/um/include/uapi/asm/dma.h
+similarity index 100%
+rename from arch/um/include/asm/dma.h
+rename to arch/um/include/uapi/asm/dma.h
+diff --git a/arch/um/include/asm/fixmap.h b/arch/um/include/uapi/asm/fixmap.h
+similarity index 100%
+rename from arch/um/include/asm/fixmap.h
+rename to arch/um/include/uapi/asm/fixmap.h
+diff --git a/arch/um/include/asm/irq.h b/arch/um/include/uapi/asm/irq.h
+similarity index 100%
+rename from arch/um/include/asm/irq.h
+rename to arch/um/include/uapi/asm/irq.h
+diff --git a/arch/um/include/asm/irqflags.h b/arch/um/include/uapi/asm/irqflags.h
+similarity index 100%
+rename from arch/um/include/asm/irqflags.h
+rename to arch/um/include/uapi/asm/irqflags.h
+diff --git a/arch/um/include/asm/kmap_types.h b/arch/um/include/uapi/asm/kmap_types.h
+similarity index 100%
+rename from arch/um/include/asm/kmap_types.h
+rename to arch/um/include/uapi/asm/kmap_types.h
+diff --git a/arch/um/include/asm/kvm_para.h b/arch/um/include/uapi/asm/kvm_para.h
+similarity index 100%
+rename from arch/um/include/asm/kvm_para.h
+rename to arch/um/include/uapi/asm/kvm_para.h
+diff --git a/arch/um/include/asm/mmu.h b/arch/um/include/uapi/asm/mmu.h
+similarity index 100%
+rename from arch/um/include/asm/mmu.h
+rename to arch/um/include/uapi/asm/mmu.h
+diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/uapi/asm/mmu_context.h
+similarity index 100%
+rename from arch/um/include/asm/mmu_context.h
+rename to arch/um/include/uapi/asm/mmu_context.h
+diff --git a/arch/um/include/asm/page.h b/arch/um/include/uapi/asm/page.h
+similarity index 100%
+rename from arch/um/include/asm/page.h
+rename to arch/um/include/uapi/asm/page.h
+diff --git a/arch/um/include/asm/pgalloc.h b/arch/um/include/uapi/asm/pgalloc.h
+similarity index 100%
+rename from arch/um/include/asm/pgalloc.h
+rename to arch/um/include/uapi/asm/pgalloc.h
+diff --git a/arch/um/include/asm/pgtable-2level.h b/arch/um/include/uapi/asm/pgtable-2level.h
+similarity index 100%
+rename from arch/um/include/asm/pgtable-2level.h
+rename to arch/um/include/uapi/asm/pgtable-2level.h
+diff --git a/arch/um/include/asm/pgtable-3level.h b/arch/um/include/uapi/asm/pgtable-3level.h
+similarity index 100%
+rename from arch/um/include/asm/pgtable-3level.h
+rename to arch/um/include/uapi/asm/pgtable-3level.h
+diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/uapi/asm/pgtable.h
+similarity index 100%
+rename from arch/um/include/asm/pgtable.h
+rename to arch/um/include/uapi/asm/pgtable.h
+diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/uapi/asm/processor-generic.h
+similarity index 100%
+rename from arch/um/include/asm/processor-generic.h
+rename to arch/um/include/uapi/asm/processor-generic.h
+diff --git a/arch/um/include/asm/ptrace-generic.h b/arch/um/include/uapi/asm/ptrace-generic.h
+similarity index 100%
+rename from arch/um/include/asm/ptrace-generic.h
+rename to arch/um/include/uapi/asm/ptrace-generic.h
+diff --git a/arch/um/include/asm/setup.h b/arch/um/include/uapi/asm/setup.h
+similarity index 100%
+rename from arch/um/include/asm/setup.h
+rename to arch/um/include/uapi/asm/setup.h
+diff --git a/arch/um/include/asm/smp.h b/arch/um/include/uapi/asm/smp.h
+similarity index 100%
+rename from arch/um/include/asm/smp.h
+rename to arch/um/include/uapi/asm/smp.h
+diff --git a/arch/um/include/asm/sysrq.h b/arch/um/include/uapi/asm/sysrq.h
+similarity index 100%
+rename from arch/um/include/asm/sysrq.h
+rename to arch/um/include/uapi/asm/sysrq.h
+diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/uapi/asm/thread_info.h
+similarity index 100%
+rename from arch/um/include/asm/thread_info.h
+rename to arch/um/include/uapi/asm/thread_info.h
+diff --git a/arch/um/include/asm/timex.h b/arch/um/include/uapi/asm/timex.h
+similarity index 100%
+rename from arch/um/include/asm/timex.h
+rename to arch/um/include/uapi/asm/timex.h
+diff --git a/arch/um/include/asm/tlb.h b/arch/um/include/uapi/asm/tlb.h
+similarity index 100%
+rename from arch/um/include/asm/tlb.h
+rename to arch/um/include/uapi/asm/tlb.h
+diff --git a/arch/um/include/asm/tlbflush.h b/arch/um/include/uapi/asm/tlbflush.h
+similarity index 100%
+rename from arch/um/include/asm/tlbflush.h
+rename to arch/um/include/uapi/asm/tlbflush.h
+diff --git a/arch/um/include/asm/uaccess.h b/arch/um/include/uapi/asm/uaccess.h
+similarity index 100%
+rename from arch/um/include/asm/uaccess.h
+rename to arch/um/include/uapi/asm/uaccess.h
+-- 
+1.7.10.4
+
diff --git a/target/linux/uml/patches-3.10/100-boot-parameter-mangling.patch b/target/linux/uml/patches-3.10/100-boot-parameter-mangling.patch
new file mode 100644
index 0000000000..ff642a6f4d
--- /dev/null
+++ b/target/linux/uml/patches-3.10/100-boot-parameter-mangling.patch
@@ -0,0 +1,11 @@
+--- pristine-linux-3.4.38/init/main.c	2013-03-28 21:12:41.000000000 +0200
++++ build-linux-3.4.38/init/main.c	2013-04-04 12:25:59.987999573 +0300
+@@ -743,7 +743,7 @@
+ 	extern const struct kernel_param __start___param[], __stop___param[];
+ 	initcall_t *fn;
+ 
+-	strcpy(static_command_line, saved_command_line);
++	/* strcpy(static_command_line, saved_command_line); */
+ 	parse_args(initcall_level_names[level],
+ 		   static_command_line, __start___param,
+ 		   __stop___param - __start___param,
diff --git a/target/linux/uml/patches-3.10/101-mconsole-exec.patch b/target/linux/uml/patches-3.10/101-mconsole-exec.patch
new file mode 100644
index 0000000000..eeafab19cc
--- /dev/null
+++ b/target/linux/uml/patches-3.10/101-mconsole-exec.patch
@@ -0,0 +1,223 @@
+#
+# Minimalist mconsole exec patch 
+#
+# 3.10 version (with bit more synchronous behavior) by fingon at iki dot fi
+# Adaptation to kernel 3.3.8 made by David Fernández (david at dit.upm.es) for 
+# Starting point: mconsole-exec-2.6.30.patch for kernel 2.6.30
+# Author of original patch: Paolo Giarrusso, aka Blaisorblade 
+#                           (http://www.user-mode-linux.org/~blaisorblade)
+#
+# Known misfeatures:
+#
+# - If output is too long, blocks (and breaks horribly) 
+# (this misfeature from 3.10 patches, when minimalizing the patch;
+#  workaround: redirect to a shared filesystem if long output is expected)
+#
+# - Nothing useful is done with stdin
+#
+diff --git a/arch/um/drivers/mconsole.h b/arch/um/drivers/mconsole.h
+index 8b22535..77cc5f7 100644
+--- a/arch/um/drivers/mconsole.h
++++ b/arch/um/drivers/mconsole.h
+@@ -85,6 +85,7 @@ extern void mconsole_cad(struct mc_request *req);
+ extern void mconsole_stop(struct mc_request *req);
+ extern void mconsole_go(struct mc_request *req);
+ extern void mconsole_log(struct mc_request *req);
++extern void mconsole_exec(struct mc_request *req);
+ extern void mconsole_proc(struct mc_request *req);
+ extern void mconsole_stack(struct mc_request *req);
+ 
+diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
+index 3df3bd5..307bf75 100644
+--- a/arch/um/drivers/mconsole_kern.c
++++ b/arch/um/drivers/mconsole_kern.c
+@@ -4,6 +4,7 @@
+  * Licensed under the GPL
+  */
+ 
++#include "linux/kmod.h"
+ #include <linux/console.h>
+ #include <linux/ctype.h>
+ #include <linux/string.h>
+@@ -24,6 +25,7 @@
+ #include <linux/fs.h>
+ #include <linux/mount.h>
+ #include <linux/file.h>
++#include <linux/completion.h>
+ #include <asm/uaccess.h>
+ #include <asm/switch_to.h>
+ 
+@@ -121,6 +123,59 @@ void mconsole_log(struct mc_request *req)
+ 	mconsole_reply(req, "", 0, 0);
+ }
+ 
++void mconsole_exec(struct mc_request *req)
++{
++  struct subprocess_info *sub_info;
++  int res, len;
++  struct file *out;
++  char buf[MCONSOLE_MAX_DATA];
++
++  char *envp[] = {
++    "HOME=/", "TERM=linux",
++    "PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin",
++    NULL
++  };
++  char *argv[] = {
++    "/bin/sh", "-c",
++    req->request.data + strlen("exec "),
++    NULL
++  };
++
++  sub_info = call_usermodehelper_setup("/bin/sh", argv, envp, GFP_ATOMIC, NULL, NULL, NULL);
++  if (sub_info == NULL) {
++    mconsole_reply(req, "call_usermodehelper_setup failed", 1, 0);
++    return;
++  }
++  res = call_usermodehelper_stdoutpipe(sub_info, &out);
++  if (res < 0) {
++    kfree(sub_info);
++    mconsole_reply(req, "call_usermodehelper_stdoutpipe failed", 1, 0);
++    return;
++  }
++
++  res = call_usermodehelper_exec(sub_info, UMH_WAIT_PROC);
++  if (res < 0) {
++    kfree(sub_info);
++    mconsole_reply(req, "call_usermodehelper_exec failed", 1, 0);
++    return;
++  }
++
++  for (;;) {
++    len = out->f_op->read(out, buf, sizeof(buf), &out->f_pos);
++    if (len < 0) {
++      mconsole_reply(req, "reading output failed", 1, 0);
++      break;
++    }
++    if (len == 0)
++      break;
++    mconsole_reply_len(req, buf, len, 0, 1);
++  }
++  fput(out);
++
++  mconsole_reply_len(req, NULL, 0, 0, 0);
++}
++
++
+ void mconsole_proc(struct mc_request *req)
+ {
+ 	struct vfsmount *mnt = task_active_pid_ns(current)->proc_mnt;
+@@ -187,6 +242,7 @@ void mconsole_proc(struct mc_request *req)
+     stop - pause the UML; it will do nothing until it receives a 'go' \n\
+     go - continue the UML after a 'stop' \n\
+     log <string> - make UML enter <string> into the kernel log\n\
++    exec <string> - pass <string> to /bin/sh -c synchronously\n\
+     proc <file> - returns the contents of the UML's /proc/<file>\n\
+     stack <pid> - returns the stack of the specified pid\n\
+ "
+diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
+index 9920982..3ed0d32 100644
+--- a/arch/um/drivers/mconsole_user.c
++++ b/arch/um/drivers/mconsole_user.c
+@@ -30,6 +30,7 @@ static struct mconsole_command commands[] = {
+ 	{ "stop", mconsole_stop, MCONSOLE_PROC },
+ 	{ "go", mconsole_go, MCONSOLE_INTR },
+ 	{ "log", mconsole_log, MCONSOLE_INTR },
++	{ "exec", mconsole_exec, MCONSOLE_PROC },
+ 	{ "proc", mconsole_proc, MCONSOLE_PROC },
+ 	{ "stack", mconsole_stack, MCONSOLE_INTR },
+ };
+diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
+index c17bd6f..1c55fa8 100644
+--- a/arch/um/os-Linux/file.c
++++ b/arch/um/os-Linux/file.c
+@@ -519,6 +519,8 @@ int os_create_unix_socket(const char *file, int len, int close_on_exec)
+ 
+ 	addr.sun_family = AF_UNIX;
+ 
++	if (len > sizeof(addr.sun_path))
++		len = sizeof(addr.sun_path);
+ 	snprintf(addr.sun_path, len, "%s", file);
+ 
+ 	err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+diff --git a/include/linux/kmod.h b/include/linux/kmod.h
+index 0555cc6..476084d 100644
+--- a/include/linux/kmod.h
++++ b/include/linux/kmod.h
+@@ -62,6 +62,7 @@ struct subprocess_info {
+ 	int wait;
+ 	int retval;
+ 	int (*init)(struct subprocess_info *info, struct cred *new);
++	struct file *stdout;
+ 	void (*cleanup)(struct subprocess_info *info);
+ 	void *data;
+ };
+@@ -104,4 +105,6 @@ extern int usermodehelper_read_trylock(void);
+ extern long usermodehelper_read_lock_wait(long timeout);
+ extern void usermodehelper_read_unlock(void);
+ 
++int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info, struct file **filp);
++
+ #endif /* __LINUX_KMOD_H__ */
+diff --git a/kernel/kmod.c b/kernel/kmod.c
+index 8241906..2d7f718 100644
+--- a/kernel/kmod.c
++++ b/kernel/kmod.c
+@@ -39,6 +39,7 @@
+ #include <linux/rwsem.h>
+ #include <linux/ptrace.h>
+ #include <linux/async.h>
++#include <linux/pipe_fs_i.h>
+ #include <asm/uaccess.h>
+ 
+ #include <trace/events/module.h>
+@@ -206,6 +207,28 @@ static int ____call_usermodehelper(void *data)
+ 	flush_signal_handlers(current, 1);
+ 	spin_unlock_irq(&current->sighand->siglock);
+ 
++        /* Install output when needed */
++        if (sub_info->stdout) {
++                struct files_struct *f = current->files;
++                struct fdtable *fdt;
++
++                sys_close(1);
++                sys_close(2);
++                get_file(sub_info->stdout);
++                fd_install(1, sub_info->stdout);
++                fd_install(2, sub_info->stdout);
++                spin_lock(&f->file_lock);
++                fdt = files_fdtable(f);
++                __set_bit(1, fdt->open_fds);
++                __clear_bit(1, fdt->close_on_exec);
++                __set_bit(2, fdt->open_fds);
++                __clear_bit(2, fdt->close_on_exec);
++                spin_unlock(&f->file_lock);
++
++                /* disallow core files */
++                current->signal->rlim[RLIMIT_CORE] = (struct rlimit){0, 0};
++        }
++
+ 	/* We can run anywhere, unlike our parent keventd(). */
+ 	set_cpus_allowed_ptr(current, cpu_all_mask);
+ 
+@@ -551,6 +574,20 @@ struct subprocess_info *call_usermodehelper_setup(char *path, char **argv,
+ }
+ EXPORT_SYMBOL(call_usermodehelper_setup);
+ 
++int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info,
++                                 struct file **filp)
++{
++  struct file *f[2];
++
++  if (create_pipe_files(f, 0)<0)
++    return PTR_ERR(f);
++  sub_info->stdout = f[1];
++  *filp = f[0];
++  return 0;
++}
++EXPORT_SYMBOL(call_usermodehelper_stdoutpipe);
++
++
+ /**
+  * call_usermodehelper_exec - start a usermode application
+  * @sub_info: information about the subprocessa
diff --git a/target/linux/uml/patches-3.10/102-pseudo-random-mac.patch b/target/linux/uml/patches-3.10/102-pseudo-random-mac.patch
new file mode 100644
index 0000000000..6f790f9693
--- /dev/null
+++ b/target/linux/uml/patches-3.10/102-pseudo-random-mac.patch
@@ -0,0 +1,129 @@
+===============================================================================
+
+This patch makes MAC addresses of network interfaces predictable. In
+particular, it adds a small routine that computes MAC addresses of based on
+a SHA1 hash of the virtual machine name and interface ID.
+
+TECHNICAL INFORMATION:
+
+Applies to vanilla kernel 3.9.4.
+
+===============================================================================
+diff -aur linux-3.9.4-orig/arch/um/Kconfig.net linux-3.9.4/arch/um/Kconfig.net
+--- linux-3.9.4-orig/arch/um/Kconfig.net	2013-05-24 21:45:59.000000000 +0300
++++ linux-3.9.4/arch/um/Kconfig.net	2013-06-11 13:07:06.363999999 +0300
+@@ -21,6 +21,19 @@
+         enable at least one of the following transport options to actually
+         make use of UML networking.
+ 
++config UML_NET_RANDOM_MAC
++	bool "Use random MAC addresses for network interfaces"
++	default n
++	depends on UML_NET
++	help
++        Virtual network devices inside a User-Mode Linux instance must be
++        assigned a MAC (Ethernet) address. If none is specified on the UML
++        command line, one must be automatically computed. If this option is
++        enabled, a randomly generated address is used. Otherwise, if this
++        option is disabled, the address is generated from a SHA1 hash of
++        the umid of the UML instance and the interface name. The latter choice
++        is useful to make MAC addresses predictable.
++
+ config UML_NET_ETHERTAP
+ 	bool "Ethertap transport"
+ 	depends on UML_NET
+diff -aur linux-3.9.4-orig/arch/um/drivers/net_kern.c linux-3.9.4/arch/um/drivers/net_kern.c
+--- linux-3.9.4-orig/arch/um/drivers/net_kern.c	2013-05-24 21:45:59.000000000 +0300
++++ linux-3.9.4/arch/um/drivers/net_kern.c	2013-06-11 13:09:03.452000001 +0300
+@@ -25,6 +25,13 @@
+ #include <net_kern.h>
+ #include <net_user.h>
+ 
++#include <crypto/sha.h>
++#include <linux/string.h>
++#include <linux/crypto.h>
++#include <linux/err.h>
++#include <linux/scatterlist.h>
++#include "os.h"
++
+ #define DRIVER_NAME "uml-netdev"
+ 
+ static DEFINE_SPINLOCK(opened_lock);
+@@ -295,11 +302,47 @@
+ #endif
+ }
+ 
++#ifndef CONFIG_UML_NET_RANDOM_MAC
++
++/* Compute a SHA1 hash of the UML instance's id and
++ *  * an interface name. */
++static int compute_hash(const char *umid, const char *ifname, char *hash) {
++	char vmif[1024];
++	struct scatterlist sg;
++	struct crypto_hash *tfm;
++	struct hash_desc desc;
++
++	strcpy (vmif, umid);
++	strcat (vmif, ifname);
++
++	tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
++	if (IS_ERR(tfm))
++		return 1;
++
++	desc.tfm = tfm;
++	desc.flags = 0;
++
++	sg_init_table(&sg, 1);
++	sg_set_buf(&sg, vmif, strlen(vmif));
++
++	if (crypto_hash_digest(&desc, &sg, strlen(vmif), hash)) {
++		crypto_free_hash(tfm);
++		return 1;
++	}
++
++	crypto_free_hash(tfm);
++
++	return 0;
++}
++
++#endif
++
+ static void setup_etheraddr(struct net_device *dev, char *str)
+ {
+ 	unsigned char *addr = dev->dev_addr;
+ 	char *end;
+ 	int i;
++	u8 hash[SHA1_DIGEST_SIZE];
+ 
+ 	if (str == NULL)
+ 		goto random;
+@@ -340,9 +383,26 @@
+ 	return;
+ 
+ random:
++#ifdef CONFIG_UML_NET_RANDOM_MAC
+ 	printk(KERN_INFO
+ 	       "Choosing a random ethernet address for device %s\n", dev->name);
+ 	eth_hw_addr_random(dev);
++#else
++	printk(KERN_INFO
++	       "Computing a digest to use as ethernet address for device %s\n", dev->name);
++	if (compute_hash(get_umid(), dev->name, hash)) {
++		printk(KERN_WARNING
++		       "Could not compute digest to use as ethernet address for device %s. "
++		       "Using random address instead.\n", dev->name);
++		random_ether_addr(addr);
++	}
++	else {
++		for (i=0; i < 6; i++)
++			addr[i] = (hash[i] + hash[i+6]) % 0x100;
++	}
++	addr [0] &= 0xfe; /* clear multicast bit */
++	addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
++#endif
+ }
+ 
+ static DEFINE_SPINLOCK(devices_lock);
+Only in linux-3.9.4/arch/um/drivers: net_kern.c.orig
+Only in linux-3.9.4/arch/um/drivers: net_kern.c.rej
+Only in linux-3.9.4/arch/um/drivers: net_kern.c~