uml: drop Kernel 5.4

After the switch to Kernel 5.10 the old files are no longer required.

Signed-off-by: Paul Spooren <mail@aparcar.org>

2 files changed, 0 insertions, 335 deletions

diff --git a/target/linux/uml/patches-5.4/101-mconsole-exec.patch b/target/linux/uml/patches-5.4/101-mconsole-exec.patch
deleted file mode 100644
index ca4f27b53f..0000000000
--- a/target/linux/uml/patches-5.4/101-mconsole-exec.patch
+++ /dev/null
@@ -1,205 +0,0 @@
-#
-# 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>
-@@ -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;
-@@ -183,6 +238,7 @@ 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
-@@ -557,6 +557,8 @@ 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
-@@ -23,6 +23,7 @@ struct subprocess_info {
- 	char **argv;
- 	char **envp;
- 	struct file *file;
-+	struct file *stdout;
- 	int wait;
- 	int retval;
- 	pid_t pid;
---- a/kernel/umh.c
-+++ b/kernel/umh.c
-@@ -76,6 +76,28 @@ 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
-@@ -362,6 +384,20 @@ 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
diff --git a/target/linux/uml/patches-5.4/102-pseudo-random-mac.patch b/target/linux/uml/patches-5.4/102-pseudo-random-mac.patch
deleted file mode 100644
index 19696365a1..0000000000
--- a/target/linux/uml/patches-5.4/102-pseudo-random-mac.patch
+++ /dev/null
@@ -1,130 +0,0 @@
-===============================================================================
-
-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"
- 	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);
-@@ -286,9 +294,51 @@ static void uml_net_user_timer_expire(st
- #endif
- }
- 
-+#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;
- 
-@@ -331,9 +381,26 @@ 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);