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-rw-r--r--arch/um/drivers/harddog_kern.c1
-rw-r--r--arch/um/drivers/line.c6
-rw-r--r--arch/um/drivers/mconsole_kern.c2
-rw-r--r--arch/um/drivers/net_kern.c2
-rw-r--r--arch/um/drivers/port_kern.c4
-rw-r--r--arch/um/drivers/ubd_kern.c2
-rw-r--r--arch/um/drivers/xterm_kern.c2
-rw-r--r--arch/um/include/sysdep-x86_64/kernel-offsets.h1
-rw-r--r--arch/um/kernel/irq.c2
-rw-r--r--arch/um/kernel/sigio_kern.c2
-rw-r--r--arch/um/kernel/skas/uaccess.c15
-rw-r--r--arch/um/kernel/time_kern.c2
-rw-r--r--arch/um/kernel/vmlinux.lds.S1
-rw-r--r--arch/um/os-Linux/umid.c97
-rw-r--r--arch/um/sys-i386/checksum.S1
-rw-r--r--arch/um/sys-i386/ptrace.c1
-rw-r--r--arch/um/sys-ppc/misc.S1
-rw-r--r--arch/um/sys-x86_64/syscall_table.c1
18 files changed, 85 insertions, 58 deletions
diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c
index d18a974735e6..64ff22aa077b 100644
--- a/arch/um/drivers/harddog_kern.c
+++ b/arch/um/drivers/harddog_kern.c
@@ -35,7 +35,6 @@
*/
#include <linux/module.h>
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/fs.h>
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 5ca57ca33713..ebebaabb78ad 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -373,7 +373,7 @@ static irqreturn_t line_write_interrupt(int irq, void *data,
int err;
/* Interrupts are enabled here because we registered the interrupt with
- * SA_INTERRUPT (see line_setup_irq).*/
+ * IRQF_DISABLED (see line_setup_irq).*/
spin_lock_irq(&line->lock);
err = flush_buffer(line);
@@ -406,7 +406,7 @@ static irqreturn_t line_write_interrupt(int irq, void *data,
int line_setup_irq(int fd, int input, int output, struct line *line, void *data)
{
struct line_driver *driver = line->driver;
- int err = 0, flags = SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM;
+ int err = 0, flags = IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM;
if (input)
err = um_request_irq(driver->read_irq, fd, IRQ_READ,
@@ -767,7 +767,7 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty)
spin_unlock(&winch_handler_lock);
if(um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt,
- SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
"winch", winch) < 0)
printk("register_winch_irq - failed to register IRQ\n");
}
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index 79149314ed04..b414522f7686 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -777,7 +777,7 @@ static int mconsole_init(void)
register_reboot_notifier(&reboot_notifier);
err = um_request_irq(MCONSOLE_IRQ, sock, IRQ_READ, mconsole_interrupt,
- SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
"mconsole", (void *)sock);
if (err){
printk("Failed to get IRQ for management console\n");
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index 8c7279bb353b..501f95675d89 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -128,7 +128,7 @@ static int uml_net_open(struct net_device *dev)
}
err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt,
- SA_INTERRUPT | SA_SHIRQ, dev->name, dev);
+ IRQF_DISABLED | IRQF_SHARED, dev->name, dev);
if(err != 0){
printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err);
err = -ENETUNREACH;
diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c
index 189839e4f1d4..73755f37a8a8 100644
--- a/arch/um/drivers/port_kern.c
+++ b/arch/um/drivers/port_kern.c
@@ -105,7 +105,7 @@ static int port_accept(struct port_list *port)
.port = port });
if(um_request_irq(TELNETD_IRQ, socket[0], IRQ_READ, pipe_interrupt,
- SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
"telnetd", conn)){
printk(KERN_ERR "port_accept : failed to get IRQ for "
"telnetd\n");
@@ -186,7 +186,7 @@ void *port_data(int port_num)
goto out_free;
}
if(um_request_irq(ACCEPT_IRQ, fd, IRQ_READ, port_interrupt,
- SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM, "port",
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM, "port",
port)){
printk(KERN_ERR "Failed to get IRQ for port %d\n", port_num);
goto out_close;
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 0345e2551247..602d7286b9e0 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -874,7 +874,7 @@ int ubd_driver_init(void){
return(0);
}
err = um_request_irq(UBD_IRQ, thread_fd, IRQ_READ, ubd_intr,
- SA_INTERRUPT, "ubd", ubd_dev);
+ IRQF_DISABLED, "ubd", ubd_dev);
if(err != 0)
printk(KERN_ERR "um_request_irq failed - errno = %d\n", -err);
return 0;
diff --git a/arch/um/drivers/xterm_kern.c b/arch/um/drivers/xterm_kern.c
index d269a80f4b0c..6036ec85895a 100644
--- a/arch/um/drivers/xterm_kern.c
+++ b/arch/um/drivers/xterm_kern.c
@@ -54,7 +54,7 @@ int xterm_fd(int socket, int *pid_out)
init_completion(&data->ready);
err = um_request_irq(XTERM_IRQ, socket, IRQ_READ, xterm_interrupt,
- SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
"xterm", data);
if (err){
printk(KERN_ERR "xterm_fd : failed to get IRQ for xterm, "
diff --git a/arch/um/include/sysdep-x86_64/kernel-offsets.h b/arch/um/include/sysdep-x86_64/kernel-offsets.h
index 939cc475757a..91d129fb3930 100644
--- a/arch/um/include/sysdep-x86_64/kernel-offsets.h
+++ b/arch/um/include/sysdep-x86_64/kernel-offsets.h
@@ -1,4 +1,3 @@
-#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/time.h>
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index fae43a3054a0..bfd0bdc8cd40 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -474,7 +474,7 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
}
err = um_request_irq(irq, fds[0], IRQ_READ, handler,
- SA_INTERRUPT | SA_SAMPLE_RANDOM, name,
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM, name,
(void *) (long) fds[0]);
if (err) {
printk("init_aio_irq - : um_request_irq failed, err = %d\n",
diff --git a/arch/um/kernel/sigio_kern.c b/arch/um/kernel/sigio_kern.c
index 1c1300fb1e95..51b677083948 100644
--- a/arch/um/kernel/sigio_kern.c
+++ b/arch/um/kernel/sigio_kern.c
@@ -31,7 +31,7 @@ int write_sigio_irq(int fd)
int err;
err = um_request_irq(SIGIO_WRITE_IRQ, fd, IRQ_READ, sigio_interrupt,
- SA_INTERRUPT | SA_SAMPLE_RANDOM, "write sigio",
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM, "write sigio",
NULL);
if(err){
printk("write_sigio_irq : um_request_irq failed, err = %d\n",
diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index 5992c3257167..8912cec0fe43 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -8,6 +8,7 @@
#include "linux/kernel.h"
#include "linux/string.h"
#include "linux/fs.h"
+#include "linux/hardirq.h"
#include "linux/highmem.h"
#include "asm/page.h"
#include "asm/pgtable.h"
@@ -38,7 +39,7 @@ static unsigned long maybe_map(unsigned long virt, int is_write)
return((unsigned long) phys);
}
-static int do_op(unsigned long addr, int len, int is_write,
+static int do_op_one_page(unsigned long addr, int len, int is_write,
int (*op)(unsigned long addr, int len, void *arg), void *arg)
{
struct page *page;
@@ -49,9 +50,11 @@ static int do_op(unsigned long addr, int len, int is_write,
return(-1);
page = phys_to_page(addr);
- addr = (unsigned long) kmap(page) + (addr & ~PAGE_MASK);
+ addr = (unsigned long) kmap_atomic(page, KM_UML_USERCOPY) + (addr & ~PAGE_MASK);
+
n = (*op)(addr, len, arg);
- kunmap(page);
+
+ kunmap_atomic(page, KM_UML_USERCOPY);
return(n);
}
@@ -77,7 +80,7 @@ static void do_buffer_op(void *jmpbuf, void *arg_ptr)
remain = len;
current->thread.fault_catcher = jmpbuf;
- n = do_op(addr, size, is_write, op, arg);
+ n = do_op_one_page(addr, size, is_write, op, arg);
if(n != 0){
*res = (n < 0 ? remain : 0);
goto out;
@@ -91,7 +94,7 @@ static void do_buffer_op(void *jmpbuf, void *arg_ptr)
}
while(addr < ((addr + remain) & PAGE_MASK)){
- n = do_op(addr, PAGE_SIZE, is_write, op, arg);
+ n = do_op_one_page(addr, PAGE_SIZE, is_write, op, arg);
if(n != 0){
*res = (n < 0 ? remain : 0);
goto out;
@@ -105,7 +108,7 @@ static void do_buffer_op(void *jmpbuf, void *arg_ptr)
goto out;
}
- n = do_op(addr, remain, is_write, op, arg);
+ n = do_op_one_page(addr, remain, is_write, op, arg);
if(n != 0)
*res = (n < 0 ? remain : 0);
else *res = 0;
diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c
index 820fa3615a3f..d7e044b5e5ee 100644
--- a/arch/um/kernel/time_kern.c
+++ b/arch/um/kernel/time_kern.c
@@ -195,7 +195,7 @@ int __init timer_init(void)
int err;
user_time_init();
- err = request_irq(TIMER_IRQ, um_timer, SA_INTERRUPT, "timer", NULL);
+ err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL);
if(err != 0)
printk(KERN_ERR "timer_init : request_irq failed - "
"errno = %d\n", -err);
diff --git a/arch/um/kernel/vmlinux.lds.S b/arch/um/kernel/vmlinux.lds.S
index 0a7d50ff9a4c..72acdce205e0 100644
--- a/arch/um/kernel/vmlinux.lds.S
+++ b/arch/um/kernel/vmlinux.lds.S
@@ -1,4 +1,3 @@
-#include <linux/config.h>
/* in case the preprocessor is a 32bit one */
#undef i386
#ifdef CONFIG_LD_SCRIPT_STATIC
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
index 362db059fe30..48092b95c8ab 100644
--- a/arch/um/os-Linux/umid.c
+++ b/arch/um/os-Linux/umid.c
@@ -67,32 +67,53 @@ err:
return err;
}
-static int actually_do_remove(char *dir)
+/*
+ * Unlinks the files contained in @dir and then removes @dir.
+ * Doesn't handle directory trees, so it's not like rm -rf, but almost such. We
+ * ignore ENOENT errors for anything (they happen, strangely enough - possibly due
+ * to races between multiple dying UML threads).
+ */
+static int remove_files_and_dir(char *dir)
{
DIR *directory;
struct dirent *ent;
int len;
char file[256];
+ int ret;
directory = opendir(dir);
- if(directory == NULL)
- return -errno;
+ if (directory == NULL) {
+ if (errno != ENOENT)
+ return -errno;
+ else
+ return 0;
+ }
- while((ent = readdir(directory)) != NULL){
- if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
+ while ((ent = readdir(directory)) != NULL) {
+ if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
continue;
len = strlen(dir) + sizeof("/") + strlen(ent->d_name) + 1;
- if(len > sizeof(file))
- return -E2BIG;
+ if (len > sizeof(file)) {
+ ret = -E2BIG;
+ goto out;
+ }
sprintf(file, "%s/%s", dir, ent->d_name);
- if(unlink(file) < 0)
- return -errno;
+ if (unlink(file) < 0 && errno != ENOENT) {
+ ret = -errno;
+ goto out;
+ }
}
- if(rmdir(dir) < 0)
- return -errno;
- return 0;
+ if (rmdir(dir) < 0 && errno != ENOENT) {
+ ret = -errno;
+ goto out;
+ }
+
+ ret = 0;
+out:
+ closedir(directory);
+ return ret;
}
/* This says that there isn't already a user of the specified directory even if
@@ -103,9 +124,10 @@ static int actually_do_remove(char *dir)
* something other than UML sticking stuff in the directory
* this boot racing with a shutdown of the other UML
* In any of these cases, the directory isn't useful for anything else.
+ *
+ * Boolean return: 1 if in use, 0 otherwise.
*/
-
-static int not_dead_yet(char *dir)
+static inline int is_umdir_used(char *dir)
{
char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
char pid[sizeof("nnnnn\0")], *end;
@@ -113,7 +135,7 @@ static int not_dead_yet(char *dir)
n = snprintf(file, sizeof(file), "%s/pid", dir);
if(n >= sizeof(file)){
- printk("not_dead_yet - pid filename too long\n");
+ printk("is_umdir_used - pid filename too long\n");
err = -E2BIG;
goto out;
}
@@ -123,7 +145,7 @@ static int not_dead_yet(char *dir)
if(fd < 0) {
fd = -errno;
if(fd != -ENOENT){
- printk("not_dead_yet : couldn't open pid file '%s', "
+ printk("is_umdir_used : couldn't open pid file '%s', "
"err = %d\n", file, -fd);
}
goto out;
@@ -132,18 +154,18 @@ static int not_dead_yet(char *dir)
err = 0;
n = read(fd, pid, sizeof(pid));
if(n < 0){
- printk("not_dead_yet : couldn't read pid file '%s', "
+ printk("is_umdir_used : couldn't read pid file '%s', "
"err = %d\n", file, errno);
goto out_close;
} else if(n == 0){
- printk("not_dead_yet : couldn't read pid file '%s', "
+ printk("is_umdir_used : couldn't read pid file '%s', "
"0-byte read\n", file);
goto out_close;
}
p = strtoul(pid, &end, 0);
if(end == pid){
- printk("not_dead_yet : couldn't parse pid file '%s', "
+ printk("is_umdir_used : couldn't parse pid file '%s', "
"errno = %d\n", file, errno);
goto out_close;
}
@@ -153,19 +175,32 @@ static int not_dead_yet(char *dir)
return 1;
}
- err = actually_do_remove(dir);
- if(err)
- printk("not_dead_yet - actually_do_remove failed with "
- "err = %d\n", err);
-
- return err;
-
out_close:
close(fd);
out:
return 0;
}
+/*
+ * Try to remove the directory @dir unless it's in use.
+ * Precondition: @dir exists.
+ * Returns 0 for success, < 0 for failure in removal or if the directory is in
+ * use.
+ */
+static int umdir_take_if_dead(char *dir)
+{
+ int ret;
+ if (is_umdir_used(dir))
+ return -EEXIST;
+
+ ret = remove_files_and_dir(dir);
+ if (ret) {
+ printk("is_umdir_used - remove_files_and_dir failed with "
+ "err = %d\n", ret);
+ }
+ return ret;
+}
+
static void __init create_pid_file(void)
{
char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
@@ -244,11 +279,7 @@ int __init make_umid(void)
if(err != -EEXIST)
goto err;
- /* 1 -> this umid is already in use
- * < 0 -> we couldn't remove the umid directory
- * In either case, we can't use this umid, so return -EEXIST.
- */
- if(not_dead_yet(tmp) != 0)
+ if (umdir_take_if_dead(tmp) < 0)
goto err;
err = mkdir(tmp, 0777);
@@ -344,9 +375,9 @@ static void remove_umid_dir(void)
char dir[strlen(uml_dir) + UMID_LEN + 1], err;
sprintf(dir, "%s%s", uml_dir, umid);
- err = actually_do_remove(dir);
+ err = remove_files_and_dir(dir);
if(err)
- printf("remove_umid_dir - actually_do_remove failed with "
+ printf("remove_umid_dir - remove_files_and_dir failed with "
"err = %d\n", err);
}
diff --git a/arch/um/sys-i386/checksum.S b/arch/um/sys-i386/checksum.S
index d98b2fff3d08..62c7e564f22e 100644
--- a/arch/um/sys-i386/checksum.S
+++ b/arch/um/sys-i386/checksum.S
@@ -25,7 +25,6 @@
* 2 of the License, or (at your option) any later version.
*/
-#include <linux/config.h>
#include <asm/errno.h>
/*
diff --git a/arch/um/sys-i386/ptrace.c b/arch/um/sys-i386/ptrace.c
index 6028bc7cc01b..28bf01150323 100644
--- a/arch/um/sys-i386/ptrace.c
+++ b/arch/um/sys-i386/ptrace.c
@@ -3,7 +3,6 @@
* Licensed under the GPL
*/
-#include <linux/config.h>
#include <linux/compiler.h>
#include "linux/sched.h"
#include "linux/mm.h"
diff --git a/arch/um/sys-ppc/misc.S b/arch/um/sys-ppc/misc.S
index f0c971db47e4..1364b7da578c 100644
--- a/arch/um/sys-ppc/misc.S
+++ b/arch/um/sys-ppc/misc.S
@@ -15,7 +15,6 @@
*
*/
-#include <linux/config.h>
#include <asm/processor.h>
#include "ppc_asm.h"
diff --git a/arch/um/sys-x86_64/syscall_table.c b/arch/um/sys-x86_64/syscall_table.c
index 3c4318165de0..9e9ad72c2ba4 100644
--- a/arch/um/sys-x86_64/syscall_table.c
+++ b/arch/um/sys-x86_64/syscall_table.c
@@ -4,7 +4,6 @@
#include <linux/linkage.h>
#include <linux/sys.h>
#include <linux/cache.h>
-#include <linux/config.h>
#define __NO_STUBS
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.