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uml: add Kernel 5.10 support via testing 

Add the latest default Kernel for testing. This step is required to keep
UML in tree for the next release.

Signed-off-by: Paul Spooren <mail@aparcar.org>
This commit is contained in:
Paul Spooren 2021-10-20 14:48:06 -10:00
parent 106c8add9c
commit 7b7bbec453
4 changed files with 497 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
target/linux/uml/Makefile
View File

@ -14,6 +14,7 @@ BOARDNAME:=User Mode Linux
FEATURES:=squashfs ext4 audio
KERNEL_PATCHVER:=5.4
KERNEL_TESTING_PATCHVER:=5.10
include $(INCLUDE_DIR)/target.mk

136
target/linux/uml/config-5.10 Normal file
View File

@ -0,0 +1,136 @@
CONFIG_3_LEVEL_PGTABLES=y
CONFIG_64BIT=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_ARCH_NO_PREEMPT=y
CONFIG_BLK_DEV_COW_COMMON=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_UBD=y
CONFIG_BLK_DEV_UBD_SYNC=y
CONFIG_BLK_MQ_VIRTIO=y
CONFIG_BLK_SCSI_REQUEST=y
CONFIG_CDROM=y
# CONFIG_COMMON_CLK is not set
# CONFIG_COMPAT_32BIT_TIME is not set
CONFIG_CON_CHAN="xterm"
CONFIG_CON_ZERO_CHAN="fd:0,fd:1"
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_CENTAUR=y
CONFIG_CPU_SUP_HYGON=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_ZHAOXIN=y
CONFIG_CRC16=y
CONFIG_CRYPTO_CRC32=y
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_GF128MUL=y
CONFIG_CRYPTO_LIB_POLY1305_RSIZE=11
CONFIG_CRYPTO_NULL2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_SHA1=y
# CONFIG_CRYPTO_TWOFISH_X86_64 is not set
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DNOTIFY=y
# CONFIG_EARLY_PRINTK is not set
CONFIG_EXT4_FS=y
CONFIG_F2FS_FS=y
CONFIG_FAILOVER=y
CONFIG_FS_IOMAP=y
CONFIG_FS_MBCACHE=y
CONFIG_FW_LOADER_PAGED_BUF=y
CONFIG_GENERIC_CLOCKEVENTS=y
# CONFIG_GENERIC_CPU is not set
CONFIG_GENERIC_CPU_DEVICES=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_HOSTFS=y
CONFIG_HVC_DRIVER=y
CONFIG_HW_RANDOM=y
CONFIG_HZ_PERIODIC=y
CONFIG_IA32_FEAT_CTL=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_INIT_ENV_ARG_LIMIT=128
CONFIG_IRQ_WORK=y
CONFIG_ISO9660_FS=y
CONFIG_JBD2=y
# CONFIG_JFFS2_FS is not set
CONFIG_KALLSYMS=y
CONFIG_KERNEL_STACK_ORDER=2
CONFIG_LLD_VERSION=0
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_MATOM is not set
CONFIG_MAY_HAVE_RUNTIME_DEPS=y
CONFIG_MCONSOLE=y
# CONFIG_MCORE2 is not set
CONFIG_MEMFD_CREATE=y
CONFIG_MIGRATION=y
CONFIG_MK8=y
# CONFIG_MMAPPER is not set
CONFIG_MODULES_USE_ELF_RELA=y
# CONFIG_MPSC is not set
CONFIG_NAMESPACES=y
CONFIG_NEED_PER_CPU_KM=y
CONFIG_NET_FAILOVER=y
# CONFIG_NET_NS is not set
CONFIG_NLS=y
CONFIG_NO_DMA=y
CONFIG_NO_IOMEM=y
CONFIG_NR_CPUS=1
CONFIG_NULL_CHAN=y
# CONFIG_OF is not set
CONFIG_PGTABLE_LEVELS=3
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_PORT_CHAN=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
# CONFIG_PROCESSOR_SELECT is not set
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_PTY_CHAN=y
CONFIG_RD_BZIP2=y
CONFIG_RD_GZIP=y
CONFIG_RELAY=y
CONFIG_SOFT_WATCHDOG=m
CONFIG_SRCU=y
CONFIG_SSL=y
CONFIG_SSL_CHAN="pty"
CONFIG_STACKTRACE=y
CONFIG_STDERR_CONSOLE=y
CONFIG_TICK_CPU_ACCOUNTING=y
CONFIG_TINY_SRCU=y
CONFIG_TTY_CHAN=y
CONFIG_UML=y
CONFIG_UML_NET=y
CONFIG_UML_NET_DAEMON=y
CONFIG_UML_NET_DETERMINISTIC_MAC=y
CONFIG_UML_NET_ETHERTAP=y
CONFIG_UML_NET_MCAST=y
# CONFIG_UML_NET_PCAP is not set
CONFIG_UML_NET_SLIP=y
CONFIG_UML_NET_SLIRP=y
CONFIG_UML_NET_TUNTAP=y
# CONFIG_UML_NET_VDE is not set
CONFIG_UML_NET_VECTOR=y
CONFIG_UML_RANDOM=y
# CONFIG_UML_SOUND is not set
CONFIG_UML_TIME_TRAVEL_SUPPORT=y
CONFIG_UML_WATCHDOG=y
CONFIG_UML_X86=y
# CONFIG_USER_NS is not set
CONFIG_VIRTIO=y
CONFIG_VIRTIO_BLK=y
CONFIG_VIRTIO_CONSOLE=y
CONFIG_VIRTIO_NET=y
CONFIG_VIRTIO_UML=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_WATCHDOG_CORE=y
CONFIG_X86_64=y
CONFIG_X86_CMOV=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_INTERNODE_CACHE_SHIFT=6
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_TSC=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_XTERM_CHAN=y
CONFIG_ZLIB_INFLATE=y

213
target/linux/uml/patches-5.10/101-mconsole-exec.patch Normal file
View File

@ -0,0 +1,213 @@
#
# 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
#
--- a/arch/um/drivers/mconsole.h
+++ b/arch/um/drivers/mconsole.h
@@ -85,6 +85,7 @@ extern void mconsole_cad(struct mc_reque
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);
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -4,6 +4,7 @@
* Copyright (C) 2001 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
+#include <linux/kmod.h>
#include <linux/console.h>
#include <linux/ctype.h>
#include <linux/string.h>
@@ -26,6 +27,7 @@
#include <linux/mount.h>
#include <linux/file.h>
#include <linux/uaccess.h>
+#include <linux/completion.h>
#include <asm/switch_to.h>
#include <init.h>
@@ -123,6 +125,59 @@ 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 = proc_mnt;
@@ -189,6 +244,7 @@ void mconsole_proc(struct mc_request *re
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\
"
--- 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 },
};
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -560,6 +560,8 @@ int os_create_unix_socket(const char *fi
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));
--- a/include/linux/kmod.h
+++ b/include/linux/kmod.h
@@ -32,4 +32,6 @@ static inline int request_module_nowait(
#define try_then_request_module(x, mod...) (x)
#endif
+int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info, struct file **filp);
+
#endif /* __LINUX_KMOD_H__ */
--- a/include/linux/umh.h
+++ b/include/linux/umh.h
@@ -22,6 +22,7 @@ struct subprocess_info {
const char *path;
char **argv;
char **envp;
+ struct file *stdout;
int wait;
int retval;
int (*init)(struct subprocess_info *info, struct cred *new);
--- a/kernel/umh.c
+++ b/kernel/umh.c
@@ -27,6 +27,7 @@
#include <linux/ptrace.h>
#include <linux/async.h>
#include <linux/uaccess.h>
+#include <linux/pipe_fs_i.h>
#include <trace/events/module.h>
@@ -72,6 +73,28 @@ static int call_usermodehelper_exec_asyn
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};
+ }
+
/*
* Initial kernel threads share ther FS with init, in order to
* get the init root directory. But we've now created a new
@@ -330,6 +353,20 @@ static void helper_unlock(void)
wake_up(&running_helpers_waitq);
}
+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_setup - prepare to call a usermode helper
* @path: path to usermode executable

147
target/linux/uml/patches-5.10/102-pseudo-random-mac.patch Normal file
View File

@ -0,0 +1,147 @@
===============================================================================
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.
===============================================================================
--- a/arch/um/drivers/Kconfig
+++ b/arch/um/drivers/Kconfig
@@ -146,6 +146,20 @@ config UML_NET
enable at least one of the following transport options to actually
make use of UML networking.
+config UML_NET_DETERMINISTIC_MAC
+ bool "Use deterministic MAC addresses for network interfaces"
+ default y
+ depends on UML_NET
+ select CRYPTO_SHA1
+ 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 (obsolete)"
depends on UML_NET
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -25,6 +25,14 @@
#include <net_kern.h>
#include <net_user.h>
+#include <crypto/sha.h>
+#include <crypto/hash.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);
@@ -274,9 +282,51 @@ static const struct ethtool_ops uml_net_
.get_ts_info = ethtool_op_get_ts_info,
};
+#ifdef CONFIG_UML_NET_DETERMINISTIC_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)
+{
+ struct ahash_request *desc;
+ struct crypto_ahash *tfm;
+ struct scatterlist sg;
+ char vmif[1024];
+ int ret;
+
+ strcpy (vmif, umid);
+ strcat (vmif, ifname);
+
+ tfm = crypto_alloc_ahash("sha1", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(tfm))
+ return -ENOMEM;
+
+ desc = ahash_request_alloc(tfm, GFP_KERNEL);
+ if (!desc) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ crypto_ahash_clear_flags(tfm, ~0);
+
+ sg_init_table(&sg, 1);
+ sg_set_buf(&sg, vmif, strlen(vmif));
+
+ ahash_request_set_crypt(desc, &sg, hash, strlen(vmif));
+
+ ret = crypto_ahash_digest(desc);
+out:
+ crypto_free_ahash(tfm);
+
+ return ret;
+}
+
+#endif
+
void uml_net_setup_etheraddr(struct net_device *dev, char *str)
{
unsigned char *addr = dev->dev_addr;
+ u8 hash[SHA1_DIGEST_SIZE];
char *end;
int i;
@@ -319,9 +369,26 @@ void uml_net_setup_etheraddr(struct net_
return;
random:
+#ifndef CONFIG_UML_NET_DETERMINISTIC_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) < 0) {
+ 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);
--- a/kernel/umh.c
+++ b/kernel/umh.c
@@ -354,12 +354,12 @@ static void helper_unlock(void)
}
int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info,
- struct file **filp)
+ struct file **filp)
{
struct file *f[2];
if (create_pipe_files(f, 0) < 0)
- return PTR_ERR(f);
+ return PTR_ERR(f);
sub_info->stdout = f[1];
*filp = f[0];