Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index ada473b..839915b 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -1,23 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
-# Licensed under the GPL
#
# Don't instrument UML-specific code
KCOV_INSTRUMENT := n
-obj-y = aio.o execvp.o file.o helper.o irq.o main.o mem.o process.o \
+obj-y = execvp.o file.o helper.o irq.o main.o mem.o process.o \
registers.o sigio.o signal.o start_up.o time.o tty.o \
umid.o user_syms.o util.o drivers/ skas/
obj-$(CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA) += elf_aux.o
-USER_OBJS := $(user-objs-y) aio.o elf_aux.o execvp.o file.o helper.o irq.o \
+USER_OBJS := $(user-objs-y) elf_aux.o execvp.o file.o helper.o irq.o \
main.o mem.o process.o registers.o sigio.o signal.o start_up.o time.o \
tty.o umid.o util.o
-HAVE_AIO_ABI := $(shell [ -r /usr/include/linux/aio_abi.h ] && \
- echo -DHAVE_AIO_ABI )
-CFLAGS_aio.o += $(HAVE_AIO_ABI)
-
include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c
deleted file mode 100644
index 014eb35..0000000
--- a/arch/um/os-Linux/aio.c
+++ /dev/null
@@ -1,390 +0,0 @@
-/*
- * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <unistd.h>
-#include <sched.h>
-#include <signal.h>
-#include <errno.h>
-#include <sys/time.h>
-#include <asm/unistd.h>
-#include <aio.h>
-#include <init.h>
-#include <kern_util.h>
-#include <os.h>
-
-struct aio_thread_req {
- enum aio_type type;
- int io_fd;
- unsigned long long offset;
- char *buf;
- int len;
- struct aio_context *aio;
-};
-
-#if defined(HAVE_AIO_ABI)
-#include <linux/aio_abi.h>
-
-/*
- * If we have the headers, we are going to build with AIO enabled.
- * If we don't have aio in libc, we define the necessary stubs here.
- */
-
-#if !defined(HAVE_AIO_LIBC)
-
-static long io_setup(int n, aio_context_t *ctxp)
-{
- return syscall(__NR_io_setup, n, ctxp);
-}
-
-static long io_submit(aio_context_t ctx, long nr, struct iocb **iocbpp)
-{
- return syscall(__NR_io_submit, ctx, nr, iocbpp);
-}
-
-static long io_getevents(aio_context_t ctx_id, long min_nr, long nr,
- struct io_event *events, struct timespec *timeout)
-{
- return syscall(__NR_io_getevents, ctx_id, min_nr, nr, events, timeout);
-}
-
-#endif
-
-/*
- * The AIO_MMAP cases force the mmapped page into memory here
- * rather than in whatever place first touches the data. I used
- * to do this by touching the page, but that's delicate because
- * gcc is prone to optimizing that away. So, what's done here
- * is we read from the descriptor from which the page was
- * mapped. The caller is required to pass an offset which is
- * inside the page that was mapped. Thus, when the read
- * returns, we know that the page is in the page cache, and
- * that it now backs the mmapped area.
- */
-
-static int do_aio(aio_context_t ctx, enum aio_type type, int fd, char *buf,
- int len, unsigned long long offset, struct aio_context *aio)
-{
- struct iocb *iocbp = & ((struct iocb) {
- .aio_data = (unsigned long) aio,
- .aio_fildes = fd,
- .aio_buf = (unsigned long) buf,
- .aio_nbytes = len,
- .aio_offset = offset
- });
- char c;
-
- switch (type) {
- case AIO_READ:
- iocbp->aio_lio_opcode = IOCB_CMD_PREAD;
- break;
- case AIO_WRITE:
- iocbp->aio_lio_opcode = IOCB_CMD_PWRITE;
- break;
- case AIO_MMAP:
- iocbp->aio_lio_opcode = IOCB_CMD_PREAD;
- iocbp->aio_buf = (unsigned long) &c;
- iocbp->aio_nbytes = sizeof(c);
- break;
- default:
- printk(UM_KERN_ERR "Bogus op in do_aio - %d\n", type);
- return -EINVAL;
- }
-
- return (io_submit(ctx, 1, &iocbp) > 0) ? 0 : -errno;
-}
-
-/* Initialized in an initcall and unchanged thereafter */
-static aio_context_t ctx = 0;
-
-static int aio_thread(void *arg)
-{
- struct aio_thread_reply reply;
- struct io_event event;
- int err, n, reply_fd;
-
- os_fix_helper_signals();
- while (1) {
- n = io_getevents(ctx, 1, 1, &event, NULL);
- if (n < 0) {
- if (errno == EINTR)
- continue;
- printk(UM_KERN_ERR "aio_thread - io_getevents failed, "
- "errno = %d\n", errno);
- }
- else {
- reply = ((struct aio_thread_reply)
- { .data = (void *) (long) event.data,
- .err = event.res });
- reply_fd = ((struct aio_context *) reply.data)->reply_fd;
- err = write(reply_fd, &reply, sizeof(reply));
- if (err != sizeof(reply))
- printk(UM_KERN_ERR "aio_thread - write failed, "
- "fd = %d, err = %d\n", reply_fd, errno);
- }
- }
- return 0;
-}
-
-#endif
-
-static int do_not_aio(struct aio_thread_req *req)
-{
- char c;
- unsigned long long actual;
- int n;
-
- actual = lseek64(req->io_fd, req->offset, SEEK_SET);
- if (actual != req->offset)
- return -errno;
-
- switch (req->type) {
- case AIO_READ:
- n = read(req->io_fd, req->buf, req->len);
- break;
- case AIO_WRITE:
- n = write(req->io_fd, req->buf, req->len);
- break;
- case AIO_MMAP:
- n = read(req->io_fd, &c, sizeof(c));
- break;
- default:
- printk(UM_KERN_ERR "do_not_aio - bad request type : %d\n",
- req->type);
- return -EINVAL;
- }
-
- if (n < 0)
- return -errno;
- return 0;
-}
-
-/* These are initialized in initcalls and not changed */
-static int aio_req_fd_r = -1;
-static int aio_req_fd_w = -1;
-static int aio_pid = -1;
-static unsigned long aio_stack;
-
-static int not_aio_thread(void *arg)
-{
- struct aio_thread_req req;
- struct aio_thread_reply reply;
- int err;
-
- os_fix_helper_signals();
- while (1) {
- err = read(aio_req_fd_r, &req, sizeof(req));
- if (err != sizeof(req)) {
- if (err < 0)
- printk(UM_KERN_ERR "not_aio_thread - "
- "read failed, fd = %d, err = %d\n",
- aio_req_fd_r,
- errno);
- else {
- printk(UM_KERN_ERR "not_aio_thread - short "
- "read, fd = %d, length = %d\n",
- aio_req_fd_r, err);
- }
- continue;
- }
- err = do_not_aio(&req);
- reply = ((struct aio_thread_reply) { .data = req.aio,
- .err = err });
- err = write(req.aio->reply_fd, &reply, sizeof(reply));
- if (err != sizeof(reply))
- printk(UM_KERN_ERR "not_aio_thread - write failed, "
- "fd = %d, err = %d\n", req.aio->reply_fd, errno);
- }
-
- return 0;
-}
-
-static int init_aio_24(void)
-{
- int fds[2], err;
-
- err = os_pipe(fds, 1, 1);
- if (err)
- goto out;
-
- aio_req_fd_w = fds[0];
- aio_req_fd_r = fds[1];
-
- err = os_set_fd_block(aio_req_fd_w, 0);
- if (err)
- goto out_close_pipe;
-
- err = run_helper_thread(not_aio_thread, NULL,
- CLONE_FILES | CLONE_VM, &aio_stack);
- if (err < 0)
- goto out_close_pipe;
-
- aio_pid = err;
- goto out;
-
-out_close_pipe:
- close(fds[0]);
- close(fds[1]);
- aio_req_fd_w = -1;
- aio_req_fd_r = -1;
-out:
-#ifndef HAVE_AIO_ABI
- printk(UM_KERN_INFO "/usr/include/linux/aio_abi.h not present during "
- "build\n");
-#endif
- printk(UM_KERN_INFO "2.6 host AIO support not used - falling back to "
- "I/O thread\n");
- return 0;
-}
-
-#ifdef HAVE_AIO_ABI
-#define DEFAULT_24_AIO 0
-static int init_aio_26(void)
-{
- int err;
-
- if (io_setup(256, &ctx)) {
- err = -errno;
- printk(UM_KERN_ERR "aio_thread failed to initialize context, "
- "err = %d\n", errno);
- return err;
- }
-
- err = run_helper_thread(aio_thread, NULL,
- CLONE_FILES | CLONE_VM, &aio_stack);
- if (err < 0)
- return err;
-
- aio_pid = err;
-
- printk(UM_KERN_INFO "Using 2.6 host AIO\n");
- return 0;
-}
-
-static int submit_aio_26(enum aio_type type, int io_fd, char *buf, int len,
- unsigned long long offset, struct aio_context *aio)
-{
- struct aio_thread_reply reply;
- int err;
-
- err = do_aio(ctx, type, io_fd, buf, len, offset, aio);
- if (err) {
- reply = ((struct aio_thread_reply) { .data = aio,
- .err = err });
- err = write(aio->reply_fd, &reply, sizeof(reply));
- if (err != sizeof(reply)) {
- err = -errno;
- printk(UM_KERN_ERR "submit_aio_26 - write failed, "
- "fd = %d, err = %d\n", aio->reply_fd, -err);
- }
- else err = 0;
- }
-
- return err;
-}
-
-#else
-#define DEFAULT_24_AIO 1
-static int init_aio_26(void)
-{
- return -ENOSYS;
-}
-
-static int submit_aio_26(enum aio_type type, int io_fd, char *buf, int len,
- unsigned long long offset, struct aio_context *aio)
-{
- return -ENOSYS;
-}
-#endif
-
-/* Initialized in an initcall and unchanged thereafter */
-static int aio_24 = DEFAULT_24_AIO;
-
-static int __init set_aio_24(char *name, int *add)
-{
- aio_24 = 1;
- return 0;
-}
-
-__uml_setup("aio=2.4", set_aio_24,
-"aio=2.4\n"
-" This is used to force UML to use 2.4-style AIO even when 2.6 AIO is\n"
-" available. 2.4 AIO is a single thread that handles one request at a\n"
-" time, synchronously. 2.6 AIO is a thread which uses the 2.6 AIO \n"
-" interface to handle an arbitrary number of pending requests. 2.6 AIO \n"
-" is not available in tt mode, on 2.4 hosts, or when UML is built with\n"
-" /usr/include/linux/aio_abi.h not available. Many distributions don't\n"
-" include aio_abi.h, so you will need to copy it from a kernel tree to\n"
-" your /usr/include/linux in order to build an AIO-capable UML\n\n"
-);
-
-static int init_aio(void)
-{
- int err;
-
- if (!aio_24) {
- err = init_aio_26();
- if (err && (errno == ENOSYS)) {
- printk(UM_KERN_INFO "2.6 AIO not supported on the "
- "host - reverting to 2.4 AIO\n");
- aio_24 = 1;
- }
- else return err;
- }
-
- if (aio_24)
- return init_aio_24();
-
- return 0;
-}
-
-/*
- * The reason for the __initcall/__uml_exitcall asymmetry is that init_aio
- * needs to be called when the kernel is running because it calls run_helper,
- * which needs get_free_page. exit_aio is a __uml_exitcall because the generic
- * kernel does not run __exitcalls on shutdown, and can't because many of them
- * break when called outside of module unloading.
- */
-__initcall(init_aio);
-
-static void exit_aio(void)
-{
- if (aio_pid != -1) {
- os_kill_process(aio_pid, 1);
- free_stack(aio_stack, 0);
- }
-}
-
-__uml_exitcall(exit_aio);
-
-static int submit_aio_24(enum aio_type type, int io_fd, char *buf, int len,
- unsigned long long offset, struct aio_context *aio)
-{
- struct aio_thread_req req = { .type = type,
- .io_fd = io_fd,
- .offset = offset,
- .buf = buf,
- .len = len,
- .aio = aio,
- };
- int err;
-
- err = write(aio_req_fd_w, &req, sizeof(req));
- if (err == sizeof(req))
- err = 0;
- else err = -errno;
-
- return err;
-}
-
-int submit_aio(enum aio_type type, int io_fd, char *buf, int len,
- unsigned long long offset, int reply_fd,
- struct aio_context *aio)
-{
- aio->reply_fd = reply_fd;
- if (aio_24)
- return submit_aio_24(type, io_fd, buf, len, offset, aio);
- else
- return submit_aio_26(type, io_fd, buf, len, offset, aio);
-}
diff --git a/arch/um/os-Linux/drivers/Makefile b/arch/um/os-Linux/drivers/Makefile
index 6c546dc..d79e75f 100644
--- a/arch/um/os-Linux/drivers/Makefile
+++ b/arch/um/os-Linux/drivers/Makefile
@@ -1,6 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
-# Licensed under the GPL
#
ethertap-objs := ethertap_kern.o ethertap_user.o
diff --git a/arch/um/os-Linux/drivers/etap.h b/arch/um/os-Linux/drivers/etap.h
index 54183a6..a475259 100644
--- a/arch/um/os-Linux/drivers/etap.h
+++ b/arch/um/os-Linux/drivers/etap.h
@@ -1,6 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#ifndef __DRIVERS_ETAP_H
diff --git a/arch/um/os-Linux/drivers/ethertap_kern.c b/arch/um/os-Linux/drivers/ethertap_kern.c
index f424600..3182e75 100644
--- a/arch/um/os-Linux/drivers/ethertap_kern.c
+++ b/arch/um/os-Linux/drivers/ethertap_kern.c
@@ -1,9 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
* James Leu (jleu@mindspring.net).
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright (C) 2001 by various other people who didn't put their name here.
- * Licensed under the GPL.
*/
#include <linux/init.h>
diff --git a/arch/um/os-Linux/drivers/ethertap_user.c b/arch/um/os-Linux/drivers/ethertap_user.c
index 6d49182..9483021 100644
--- a/arch/um/os-Linux/drivers/ethertap_user.c
+++ b/arch/um/os-Linux/drivers/ethertap_user.c
@@ -1,9 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
* James Leu (jleu@mindspring.net).
* Copyright (C) 2001 by various other people who didn't put their name here.
- * Licensed under the GPL.
*/
#include <stdio.h>
diff --git a/arch/um/os-Linux/drivers/tuntap.h b/arch/um/os-Linux/drivers/tuntap.h
index 7367354..e364e42 100644
--- a/arch/um/os-Linux/drivers/tuntap.h
+++ b/arch/um/os-Linux/drivers/tuntap.h
@@ -1,6 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#ifndef __UM_TUNTAP_H
diff --git a/arch/um/os-Linux/drivers/tuntap_kern.c b/arch/um/os-Linux/drivers/tuntap_kern.c
index d9d56e5..adcb671 100644
--- a/arch/um/os-Linux/drivers/tuntap_kern.c
+++ b/arch/um/os-Linux/drivers/tuntap_kern.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <linux/netdevice.h>
diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c
index db24ce0..53eb3d5 100644
--- a/arch/um/os-Linux/drivers/tuntap_user.c
+++ b/arch/um/os-Linux/drivers/tuntap_user.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdio.h>
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index c019709..5133e3a 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdio.h>
@@ -15,6 +15,7 @@
#include <sys/sysmacros.h>
#include <sys/un.h>
#include <sys/types.h>
+#include <sys/eventfd.h>
#include <os.h>
static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
@@ -610,3 +611,56 @@
{
return makedev(major, minor);
}
+
+int os_falloc_punch(int fd, unsigned long long offset, int len)
+{
+ int n = fallocate(fd, FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE, offset, len);
+
+ if (n < 0)
+ return -errno;
+ return n;
+}
+
+int os_eventfd(unsigned int initval, int flags)
+{
+ int fd = eventfd(initval, flags);
+
+ if (fd < 0)
+ return -errno;
+ return fd;
+}
+
+int os_sendmsg_fds(int fd, const void *buf, unsigned int len, const int *fds,
+ unsigned int fds_num)
+{
+ struct iovec iov = {
+ .iov_base = (void *) buf,
+ .iov_len = len,
+ };
+ union {
+ char control[CMSG_SPACE(sizeof(*fds) * OS_SENDMSG_MAX_FDS)];
+ struct cmsghdr align;
+ } u;
+ unsigned int fds_size = sizeof(*fds) * fds_num;
+ struct msghdr msg = {
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ .msg_control = u.control,
+ .msg_controllen = CMSG_SPACE(fds_size),
+ };
+ struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
+ int err;
+
+ if (fds_num > OS_SENDMSG_MAX_FDS)
+ return -EINVAL;
+ memset(u.control, 0, sizeof(u.control));
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(fds_size);
+ memcpy(CMSG_DATA(cmsg), fds, fds_size);
+ err = sendmsg(fd, &msg, 0);
+
+ if (err < 0)
+ return -errno;
+ return err;
+}
diff --git a/arch/um/os-Linux/helper.c b/arch/um/os-Linux/helper.c
index 3f02d42..9fa6e41 100644
--- a/arch/um/os-Linux/helper.c
+++ b/arch/um/os-Linux/helper.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdlib.h>
diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c
index 3658230..d508310 100644
--- a/arch/um/os-Linux/irq.c
+++ b/arch/um/os-Linux/irq.c
@@ -1,8 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2017 - Cambridge Greys Ltd
* Copyright (C) 2011 - 2014 Cisco Systems Inc
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdlib.h>
diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index f1fee2b..8014dfa 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdio.h>
@@ -170,7 +170,7 @@
* that they won't be delivered after the exec, when
* they are definitely not expected.
*/
- unblock_signals();
+ unblock_signals_trace();
os_info("\n");
/* Reboot */
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
index e162a95..3c1b774 100644
--- a/arch/um/os-Linux/mem.c
+++ b/arch/um/os-Linux/mem.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdio.h>
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index b3e0d40..e52dd37 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdio.h>
diff --git a/arch/um/os-Linux/registers.c b/arch/um/os-Linux/registers.c
index 2ff8d4f..2d92705 100644
--- a/arch/um/os-Linux/registers.c
+++ b/arch/um/os-Linux/registers.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2004 PathScale, Inc
* Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <errno.h>
diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c
index 46e762f..7555808 100644
--- a/arch/um/os-Linux/sigio.c
+++ b/arch/um/os-Linux/sigio.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2002 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <unistd.h>
@@ -132,7 +132,7 @@
int n;
char c;
- flags = set_signals(0);
+ flags = set_signals_trace(0);
CATCH_EINTR(n = write(sigio_private[0], &c, sizeof(c)));
if (n != sizeof(c)) {
printk(UM_KERN_ERR "update_thread : write failed, err = %d\n",
@@ -147,7 +147,7 @@
goto fail;
}
- set_signals(flags);
+ set_signals_trace(flags);
return;
fail:
/* Critical section start */
@@ -161,7 +161,7 @@
close(write_sigio_fds[0]);
close(write_sigio_fds[1]);
/* Critical section end */
- set_signals(flags);
+ set_signals_trace(flags);
}
int add_sigio_fd(int fd)
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index bf0acb8..b58bc68 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -1,15 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2004 PathScale, Inc
* Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <signal.h>
+#include <string.h>
#include <strings.h>
#include <as-layout.h>
#include <kern_util.h>
@@ -26,34 +27,27 @@
[SIGBUS] = bus_handler,
[SIGSEGV] = segv_handler,
[SIGIO] = sigio_handler,
- [SIGALRM] = timer_handler
};
static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc)
{
- struct uml_pt_regs *r;
+ struct uml_pt_regs r;
int save_errno = errno;
- r = uml_kmalloc(sizeof(struct uml_pt_regs), UM_GFP_ATOMIC);
- if (!r)
- panic("out of memory");
-
- r->is_user = 0;
+ r.is_user = 0;
if (sig == SIGSEGV) {
/* For segfaults, we want the data from the sigcontext. */
- get_regs_from_mc(r, mc);
- GET_FAULTINFO_FROM_MC(r->faultinfo, mc);
+ get_regs_from_mc(&r, mc);
+ GET_FAULTINFO_FROM_MC(r.faultinfo, mc);
}
/* enable signals if sig isn't IRQ signal */
- if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGALRM))
- unblock_signals();
+ if ((sig != SIGIO) && (sig != SIGWINCH))
+ unblock_signals_trace();
- (*sig_info[sig])(sig, si, r);
+ (*sig_info[sig])(sig, si, &r);
errno = save_errno;
-
- free(r);
}
/*
@@ -82,26 +76,22 @@
return;
}
- block_signals();
+ block_signals_trace();
sig_handler_common(sig, si, mc);
- set_signals(enabled);
+ set_signals_trace(enabled);
}
static void timer_real_alarm_handler(mcontext_t *mc)
{
- struct uml_pt_regs *regs;
-
- regs = uml_kmalloc(sizeof(struct uml_pt_regs), UM_GFP_ATOMIC);
- if (!regs)
- panic("out of memory");
+ struct uml_pt_regs regs;
if (mc != NULL)
- get_regs_from_mc(regs, mc);
- timer_handler(SIGALRM, NULL, regs);
-
- free(regs);
+ get_regs_from_mc(®s, mc);
+ else
+ memset(®s, 0, sizeof(regs));
+ timer_handler(SIGALRM, NULL, ®s);
}
void timer_alarm_handler(int sig, struct siginfo *unused_si, mcontext_t *mc)
@@ -114,7 +104,7 @@
return;
}
- block_signals();
+ block_signals_trace();
signals_active |= SIGALRM_MASK;
@@ -122,7 +112,7 @@
signals_active &= ~SIGALRM_MASK;
- set_signals(enabled);
+ set_signals_trace(enabled);
}
void deliver_alarm(void) {
@@ -263,6 +253,8 @@
if (signals_enabled == 1)
return;
+ signals_enabled = 1;
+
/*
* We loop because the IRQ handler returns with interrupts off. So,
* interrupts may have arrived and we need to re-enable them and
@@ -272,12 +264,9 @@
/*
* Save and reset save_pending after enabling signals. This
* way, signals_pending won't be changed while we're reading it.
- */
- signals_enabled = 1;
-
- /*
+ *
* Setting signals_enabled and reading signals_pending must
- * happen in this order.
+ * happen in this order, so have the barrier here.
*/
barrier();
@@ -290,10 +279,13 @@
/*
* We have pending interrupts, so disable signals, as the
* handlers expect them off when they are called. They will
- * be enabled again above.
+ * be enabled again above. We need to trace this, as we're
+ * expected to be enabling interrupts already, but any more
+ * tracing that happens inside the handlers we call for the
+ * pending signals will mess up the tracing state.
*/
-
signals_enabled = 0;
+ um_trace_signals_off();
/*
* Deal with SIGIO first because the alarm handler might
@@ -316,6 +308,9 @@
if (!(signals_pending & SIGIO_MASK) && (signals_active & SIGALRM_MASK))
return;
+ /* Re-enable signals and trace that we're doing so. */
+ um_trace_signals_on();
+ signals_enabled = 1;
}
}
@@ -338,6 +333,21 @@
return ret;
}
+int set_signals_trace(int enable)
+{
+ int ret;
+ if (signals_enabled == enable)
+ return enable;
+
+ ret = signals_enabled;
+ if (enable)
+ unblock_signals_trace();
+ else
+ block_signals_trace();
+
+ return ret;
+}
+
int os_is_signal_stack(void)
{
stack_t ss;
diff --git a/arch/um/os-Linux/skas/Makefile b/arch/um/os-Linux/skas/Makefile
index d2ea340..c4566e7 100644
--- a/arch/um/os-Linux/skas/Makefile
+++ b/arch/um/os-Linux/skas/Makefile
@@ -1,6 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
-# Licensed under the GPL
#
obj-y := mem.o process.o
diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c
index 35015e3..c546d16 100644
--- a/arch/um/os-Linux/skas/mem.c
+++ b/arch/um/os-Linux/skas/mem.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stddef.h>
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index df4a985..4fb877b 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2002- 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdlib.h>
@@ -425,9 +425,9 @@
case SIGBUS:
case SIGFPE:
case SIGWINCH:
- block_signals();
+ block_signals_trace();
(*sig_info[sig])(sig, (struct siginfo *)&si, regs);
- unblock_signals();
+ unblock_signals_trace();
break;
default:
printk(UM_KERN_ERR "userspace - child stopped "
@@ -625,10 +625,10 @@
cb_arg = arg;
cb_back = &here;
- block_signals();
+ block_signals_trace();
if (UML_SETJMP(&here) == 0)
UML_LONGJMP(&initial_jmpbuf, INIT_JMP_CALLBACK);
- unblock_signals();
+ unblock_signals_trace();
cb_proc = NULL;
cb_arg = NULL;
@@ -637,13 +637,13 @@
void halt_skas(void)
{
- block_signals();
+ block_signals_trace();
UML_LONGJMP(&initial_jmpbuf, INIT_JMP_HALT);
}
void reboot_skas(void)
{
- block_signals();
+ block_signals_trace();
UML_LONGJMP(&initial_jmpbuf, INIT_JMP_REBOOT);
}
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 82bf5f8..f79dc33 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdio.h>
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index 0e39b99..432f8e1 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -1,9 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2012-2014 Cisco Systems
* Copyright (C) 2000 - 2007 Jeff Dike (jdike{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stddef.h>
@@ -26,11 +26,11 @@
static inline long long timespec_to_ns(const struct timespec *ts)
{
- return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) +
- ts->tv_nsec;
+ return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) + ts->tv_nsec;
}
-long long os_persistent_clock_emulation (void) {
+long long os_persistent_clock_emulation(void)
+{
struct timespec realtime_tp;
clock_gettime(CLOCK_REALTIME, &realtime_tp);
@@ -40,94 +40,41 @@
/**
* os_timer_create() - create an new posix (interval) timer
*/
-int os_timer_create(void* timer) {
+int os_timer_create(void)
+{
+ timer_t *t = &event_high_res_timer;
- timer_t* t = timer;
-
- if(t == NULL) {
- t = &event_high_res_timer;
- }
-
- if (timer_create(
- CLOCK_MONOTONIC,
- NULL,
- t) == -1) {
+ if (timer_create(CLOCK_MONOTONIC, NULL, t) == -1)
return -1;
- }
- return 0;
-}
-
-int os_timer_set_interval(void* timer, void* i)
-{
- struct itimerspec its;
- unsigned long long nsec;
- timer_t* t = timer;
- struct itimerspec* its_in = i;
-
- if(t == NULL) {
- t = &event_high_res_timer;
- }
-
- nsec = UM_NSEC_PER_SEC / UM_HZ;
-
- if(its_in != NULL) {
- its.it_value.tv_sec = its_in->it_value.tv_sec;
- its.it_value.tv_nsec = its_in->it_value.tv_nsec;
- } else {
- its.it_value.tv_sec = 0;
- its.it_value.tv_nsec = nsec;
- }
-
- its.it_interval.tv_sec = 0;
- its.it_interval.tv_nsec = nsec;
-
- if(timer_settime(*t, 0, &its, NULL) == -1) {
- return -errno;
- }
return 0;
}
-/**
- * os_timer_remain() - returns the remaining nano seconds of the given interval
- * timer
- * Because this is the remaining time of an interval timer, which correspondends
- * to HZ, this value can never be bigger than one second. Just
- * the nanosecond part of the timer is returned.
- * The returned time is relative to the start time of the interval timer.
- * Return an negative value in an error case.
- */
-long os_timer_remain(void* timer)
+int os_timer_set_interval(unsigned long long nsecs)
{
struct itimerspec its;
- timer_t* t = timer;
- if(t == NULL) {
- t = &event_high_res_timer;
- }
+ its.it_value.tv_sec = nsecs / UM_NSEC_PER_SEC;
+ its.it_value.tv_nsec = nsecs % UM_NSEC_PER_SEC;
- if(timer_gettime(t, &its) == -1) {
+ its.it_interval.tv_sec = nsecs / UM_NSEC_PER_SEC;
+ its.it_interval.tv_nsec = nsecs % UM_NSEC_PER_SEC;
+
+ if (timer_settime(event_high_res_timer, 0, &its, NULL) == -1)
return -errno;
- }
- return its.it_value.tv_nsec;
+ return 0;
}
-int os_timer_one_shot(int ticks)
+int os_timer_one_shot(unsigned long long nsecs)
{
- struct itimerspec its;
- unsigned long long nsec;
- unsigned long sec;
+ struct itimerspec its = {
+ .it_value.tv_sec = nsecs / UM_NSEC_PER_SEC,
+ .it_value.tv_nsec = nsecs % UM_NSEC_PER_SEC,
- nsec = (ticks + 1);
- sec = nsec / UM_NSEC_PER_SEC;
- nsec = nsec % UM_NSEC_PER_SEC;
-
- its.it_value.tv_sec = nsec / UM_NSEC_PER_SEC;
- its.it_value.tv_nsec = nsec;
-
- its.it_interval.tv_sec = 0;
- its.it_interval.tv_nsec = 0; // we cheat here
+ .it_interval.tv_sec = 0,
+ .it_interval.tv_nsec = 0, // we cheat here
+ };
timer_settime(event_high_res_timer, 0, &its, NULL);
return 0;
@@ -135,24 +82,13 @@
/**
* os_timer_disable() - disable the posix (interval) timer
- * Returns the remaining interval timer time in nanoseconds
*/
-long long os_timer_disable(void)
+void os_timer_disable(void)
{
struct itimerspec its;
memset(&its, 0, sizeof(struct itimerspec));
- timer_settime(event_high_res_timer, 0, &its, &its);
-
- return its.it_value.tv_sec * UM_NSEC_PER_SEC + its.it_value.tv_nsec;
-}
-
-long long os_vnsecs(void)
-{
- struct timespec ts;
-
- clock_gettime(CLOCK_PROCESS_CPUTIME_ID,&ts);
- return timespec_to_ns(&ts);
+ timer_settime(event_high_res_timer, 0, &its, NULL);
}
long long os_nsecs(void)
@@ -169,21 +105,14 @@
*/
void os_idle_sleep(unsigned long long nsecs)
{
- struct timespec ts;
-
- if (nsecs <= 0) {
- return;
- }
-
- ts = ((struct timespec) {
- .tv_sec = nsecs / UM_NSEC_PER_SEC,
- .tv_nsec = nsecs % UM_NSEC_PER_SEC
- });
+ struct timespec ts = {
+ .tv_sec = nsecs / UM_NSEC_PER_SEC,
+ .tv_nsec = nsecs % UM_NSEC_PER_SEC
+ };
/*
* Relay the signal if clock_nanosleep is interrupted.
*/
- if (clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL)) {
+ if (clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL))
deliver_alarm();
- }
}
diff --git a/arch/um/os-Linux/tty.c b/arch/um/os-Linux/tty.c
index 721d8af..f784db8 100644
--- a/arch/um/os-Linux/tty.c
+++ b/arch/um/os-Linux/tty.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdlib.h>
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
index 998fbb4..44def53 100644
--- a/arch/um/os-Linux/umid.c
+++ b/arch/um/os-Linux/umid.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdio.h>
@@ -135,12 +135,18 @@
*/
static inline int is_umdir_used(char *dir)
{
- char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
- char pid[sizeof("nnnnn\0")], *end;
+ char pid[sizeof("nnnnn\0")], *end, *file;
int dead, fd, p, n, err;
+ size_t filelen;
- n = snprintf(file, sizeof(file), "%s/pid", dir);
- if (n >= sizeof(file)) {
+ err = asprintf(&file, "%s/pid", dir);
+ if (err < 0)
+ return 0;
+
+ filelen = strlen(file);
+
+ n = snprintf(file, filelen, "%s/pid", dir);
+ if (n >= filelen) {
printk(UM_KERN_ERR "is_umdir_used - pid filename too long\n");
err = -E2BIG;
goto out;
@@ -185,6 +191,7 @@
out_close:
close(fd);
out:
+ free(file);
return 0;
}
@@ -210,18 +217,21 @@
static void __init create_pid_file(void)
{
- char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
- char pid[sizeof("nnnnn\0")];
+ char pid[sizeof("nnnnn\0")], *file;
int fd, n;
- if (umid_file_name("pid", file, sizeof(file)))
+ file = malloc(strlen(uml_dir) + UMID_LEN + sizeof("/pid\0"));
+ if (!file)
return;
+ if (umid_file_name("pid", file, sizeof(file)))
+ goto out;
+
fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644);
if (fd < 0) {
printk(UM_KERN_ERR "Open of machine pid file \"%s\" failed: "
"%s\n", file, strerror(errno));
- return;
+ goto out;
}
snprintf(pid, sizeof(pid), "%d\n", getpid());
@@ -231,6 +241,8 @@
errno);
close(fd);
+out:
+ free(file);
}
int __init set_umid(char *name)
@@ -385,13 +397,19 @@
static void remove_umid_dir(void)
{
- char dir[strlen(uml_dir) + UMID_LEN + 1], err;
+ char *dir, err;
+
+ dir = malloc(strlen(uml_dir) + UMID_LEN + 1);
+ if (!dir)
+ return;
sprintf(dir, "%s%s", uml_dir, umid);
err = remove_files_and_dir(dir);
if (err)
os_warn("%s - remove_files_and_dir failed with err = %d\n",
__func__, err);
+
+ free(dir);
}
__uml_exitcall(remove_umid_dir);
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 8cc8b26..ecf2f39 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <stdio.h>