From: Andries.Brouwer@cwi.nl
The patch below adds a new system call mknod64 for i386. If there are no
objections I'll add it to the other architectures as well.
Note that the prototype is
mknod64(const char *name, int mode, unsigned int devhi, unsigned int devlo)
(and not ... unsigned int major, unsigned int minor).
arch/i386/kernel/entry.S | 3 ++-
fs/namei.c | 28 +++++++++++++++++++++++++---
include/asm-i386/unistd.h | 3 ++-
3 files changed, 29 insertions(+), 5 deletions(-)
diff -puN arch/i386/kernel/entry.S~ia32-mknod64 arch/i386/kernel/entry.S
--- 25/arch/i386/kernel/entry.S~ia32-mknod64 2003-07-11 01:28:51.000000000 -0700
+++ 25-akpm/arch/i386/kernel/entry.S 2003-07-11 01:28:51.000000000 -0700
@@ -902,6 +902,7 @@ ENTRY(sys_call_table)
.long sys_clock_nanosleep
.long sys_statfs64
.long sys_fstatfs64
- .long sys_tgkill
+ .long sys_tgkill /* 270 */
+ .long sys_mknod64
nr_syscalls=(.-sys_call_table)/4
diff -puN fs/namei.c~ia32-mknod64 fs/namei.c
--- 25/fs/namei.c~ia32-mknod64 2003-07-11 01:28:51.000000000 -0700
+++ 25-akpm/fs/namei.c 2003-07-11 01:28:51.000000000 -0700
@@ -1424,11 +1424,12 @@ int vfs_mknod(struct inode *dir, struct
return error;
}
-asmlinkage long sys_mknod(const char __user * filename, int mode, dev_t dev)
+static long
+do_mknod(const char __user *filename, int mode, dev_t dev)
{
int error = 0;
- char * tmp;
- struct dentry * dentry;
+ char *tmp;
+ struct dentry *dentry;
struct nameidata nd;
if (S_ISDIR(mode))
@@ -1469,6 +1470,27 @@ out:
return error;
}
+asmlinkage long
+sys_mknod(const char __user *filename, int mode, unsigned int devnr)
+{
+ dev_t dev = devnr;
+
+ if (dev != devnr)
+ return -EOVERFLOW;
+ return do_mknod(filename, mode, dev);
+}
+
+asmlinkage long
+sys_mknod64(const char __user *filename, int mode,
+ unsigned int major, unsigned int minor)
+{
+ dev_t dev = MKDEV(major, minor);
+
+ if (MAJOR(dev) != major || MINOR(dev) != minor)
+ return -EOVERFLOW;
+ return do_mknod(filename, mode, dev);
+}
+
int vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
int error = may_create(dir, dentry, NULL);
diff -puN include/asm-i386/unistd.h~ia32-mknod64 include/asm-i386/unistd.h
--- 25/include/asm-i386/unistd.h~ia32-mknod64 2003-07-11 01:28:51.000000000 -0700
+++ 25-akpm/include/asm-i386/unistd.h 2003-07-11 01:28:51.000000000 -0700
@@ -276,8 +276,9 @@
#define __NR_statfs64 268
#define __NR_fstatfs64 269
#define __NR_tgkill 270
+#define __NR_mknod64 271
-#define NR_syscalls 271
+#define NR_syscalls 272
/* user-visible error numbers are in the range -1 - -124: see <asm-i386/errno.h> */
_