Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/compat.c b/fs/compat.c
new file mode 100644
index 0000000..a912bdf
--- /dev/null
+++ b/fs/compat.c
@@ -0,0 +1,1950 @@
+/*
+ * linux/fs/compat.c
+ *
+ * Kernel compatibililty routines for e.g. 32 bit syscall support
+ * on 64 bit kernels.
+ *
+ * Copyright (C) 2002 Stephen Rothwell, IBM Corporation
+ * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
+ * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
+ * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
+ * Copyright (C) 2003 Pavel Machek (pavel@suse.cz)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+#include <linux/compat.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/namei.h>
+#include <linux/file.h>
+#include <linux/vfs.h>
+#include <linux/ioctl32.h>
+#include <linux/ioctl.h>
+#include <linux/init.h>
+#include <linux/sockios.h> /* for SIOCDEVPRIVATE */
+#include <linux/smb.h>
+#include <linux/smb_mount.h>
+#include <linux/ncp_mount.h>
+#include <linux/smp_lock.h>
+#include <linux/syscalls.h>
+#include <linux/ctype.h>
+#include <linux/module.h>
+#include <linux/dirent.h>
+#include <linux/dnotify.h>
+#include <linux/highuid.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/syscall.h>
+#include <linux/personality.h>
+#include <linux/rwsem.h>
+
+#include <net/sock.h> /* siocdevprivate_ioctl */
+
+#include <asm/uaccess.h>
+#include <asm/mmu_context.h>
+#include <asm/ioctls.h>
+
+/*
+ * Not all architectures have sys_utime, so implement this in terms
+ * of sys_utimes.
+ */
+asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
+{
+ struct timeval tv[2];
+
+ if (t) {
+ if (get_user(tv[0].tv_sec, &t->actime) ||
+ get_user(tv[1].tv_sec, &t->modtime))
+ return -EFAULT;
+ tv[0].tv_usec = 0;
+ tv[1].tv_usec = 0;
+ }
+ return do_utimes(filename, t ? tv : NULL);
+}
+
+asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
+{
+ struct timeval tv[2];
+
+ if (t) {
+ if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
+ get_user(tv[0].tv_usec, &t[0].tv_usec) ||
+ get_user(tv[1].tv_sec, &t[1].tv_sec) ||
+ get_user(tv[1].tv_usec, &t[1].tv_usec))
+ return -EFAULT;
+ }
+ return do_utimes(filename, t ? tv : NULL);
+}
+
+asmlinkage long compat_sys_newstat(char __user * filename,
+ struct compat_stat __user *statbuf)
+{
+ struct kstat stat;
+ int error = vfs_stat(filename, &stat);
+
+ if (!error)
+ error = cp_compat_stat(&stat, statbuf);
+ return error;
+}
+
+asmlinkage long compat_sys_newlstat(char __user * filename,
+ struct compat_stat __user *statbuf)
+{
+ struct kstat stat;
+ int error = vfs_lstat(filename, &stat);
+
+ if (!error)
+ error = cp_compat_stat(&stat, statbuf);
+ return error;
+}
+
+asmlinkage long compat_sys_newfstat(unsigned int fd,
+ struct compat_stat __user * statbuf)
+{
+ struct kstat stat;
+ int error = vfs_fstat(fd, &stat);
+
+ if (!error)
+ error = cp_compat_stat(&stat, statbuf);
+ return error;
+}
+
+static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
+{
+
+ if (sizeof ubuf->f_blocks == 4) {
+ if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
+ 0xffffffff00000000ULL)
+ return -EOVERFLOW;
+ /* f_files and f_ffree may be -1; it's okay
+ * to stuff that into 32 bits */
+ if (kbuf->f_files != 0xffffffffffffffffULL
+ && (kbuf->f_files & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ if (kbuf->f_ffree != 0xffffffffffffffffULL
+ && (kbuf->f_ffree & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ }
+ if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
+ __put_user(kbuf->f_type, &ubuf->f_type) ||
+ __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
+ __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
+ __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
+ __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
+ __put_user(kbuf->f_files, &ubuf->f_files) ||
+ __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
+ __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
+ __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
+ __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
+ __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
+ __put_user(0, &ubuf->f_spare[0]) ||
+ __put_user(0, &ubuf->f_spare[1]) ||
+ __put_user(0, &ubuf->f_spare[2]) ||
+ __put_user(0, &ubuf->f_spare[3]) ||
+ __put_user(0, &ubuf->f_spare[4]))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * The following statfs calls are copies of code from fs/open.c and
+ * should be checked against those from time to time
+ */
+asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
+{
+ struct nameidata nd;
+ int error;
+
+ error = user_path_walk(path, &nd);
+ if (!error) {
+ struct kstatfs tmp;
+ error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
+ if (!error && put_compat_statfs(buf, &tmp))
+ error = -EFAULT;
+ path_release(&nd);
+ }
+ return error;
+}
+
+asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
+{
+ struct file * file;
+ struct kstatfs tmp;
+ int error;
+
+ error = -EBADF;
+ file = fget(fd);
+ if (!file)
+ goto out;
+ error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
+ if (!error && put_compat_statfs(buf, &tmp))
+ error = -EFAULT;
+ fput(file);
+out:
+ return error;
+}
+
+static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
+{
+ if (sizeof ubuf->f_blocks == 4) {
+ if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
+ 0xffffffff00000000ULL)
+ return -EOVERFLOW;
+ /* f_files and f_ffree may be -1; it's okay
+ * to stuff that into 32 bits */
+ if (kbuf->f_files != 0xffffffffffffffffULL
+ && (kbuf->f_files & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ if (kbuf->f_ffree != 0xffffffffffffffffULL
+ && (kbuf->f_ffree & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ }
+ if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
+ __put_user(kbuf->f_type, &ubuf->f_type) ||
+ __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
+ __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
+ __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
+ __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
+ __put_user(kbuf->f_files, &ubuf->f_files) ||
+ __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
+ __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
+ __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
+ __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
+ __put_user(kbuf->f_frsize, &ubuf->f_frsize))
+ return -EFAULT;
+ return 0;
+}
+
+asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
+{
+ struct nameidata nd;
+ int error;
+
+ if (sz != sizeof(*buf))
+ return -EINVAL;
+
+ error = user_path_walk(path, &nd);
+ if (!error) {
+ struct kstatfs tmp;
+ error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
+ if (!error && put_compat_statfs64(buf, &tmp))
+ error = -EFAULT;
+ path_release(&nd);
+ }
+ return error;
+}
+
+asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
+{
+ struct file * file;
+ struct kstatfs tmp;
+ int error;
+
+ if (sz != sizeof(*buf))
+ return -EINVAL;
+
+ error = -EBADF;
+ file = fget(fd);
+ if (!file)
+ goto out;
+ error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
+ if (!error && put_compat_statfs64(buf, &tmp))
+ error = -EFAULT;
+ fput(file);
+out:
+ return error;
+}
+
+/* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
+
+#define IOCTL_HASHSIZE 256
+static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
+static DECLARE_RWSEM(ioctl32_sem);
+
+extern struct ioctl_trans ioctl_start[];
+extern int ioctl_table_size;
+
+static inline unsigned long ioctl32_hash(unsigned long cmd)
+{
+ return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
+}
+
+static void ioctl32_insert_translation(struct ioctl_trans *trans)
+{
+ unsigned long hash;
+ struct ioctl_trans *t;
+
+ hash = ioctl32_hash (trans->cmd);
+ if (!ioctl32_hash_table[hash])
+ ioctl32_hash_table[hash] = trans;
+ else {
+ t = ioctl32_hash_table[hash];
+ while (t->next)
+ t = t->next;
+ trans->next = NULL;
+ t->next = trans;
+ }
+}
+
+static int __init init_sys32_ioctl(void)
+{
+ int i;
+
+ for (i = 0; i < ioctl_table_size; i++) {
+ if (ioctl_start[i].next != 0) {
+ printk("ioctl translation %d bad\n",i);
+ return -1;
+ }
+
+ ioctl32_insert_translation(&ioctl_start[i]);
+ }
+ return 0;
+}
+
+__initcall(init_sys32_ioctl);
+
+int register_ioctl32_conversion(unsigned int cmd,
+ ioctl_trans_handler_t handler)
+{
+ struct ioctl_trans *t;
+ struct ioctl_trans *new_t;
+ unsigned long hash = ioctl32_hash(cmd);
+
+ new_t = kmalloc(sizeof(*new_t), GFP_KERNEL);
+ if (!new_t)
+ return -ENOMEM;
+
+ down_write(&ioctl32_sem);
+ for (t = ioctl32_hash_table[hash]; t; t = t->next) {
+ if (t->cmd == cmd) {
+ printk(KERN_ERR "Trying to register duplicated ioctl32 "
+ "handler %x\n", cmd);
+ up_write(&ioctl32_sem);
+ kfree(new_t);
+ return -EINVAL;
+ }
+ }
+ new_t->next = NULL;
+ new_t->cmd = cmd;
+ new_t->handler = handler;
+ ioctl32_insert_translation(new_t);
+
+ up_write(&ioctl32_sem);
+ return 0;
+}
+EXPORT_SYMBOL(register_ioctl32_conversion);
+
+static inline int builtin_ioctl(struct ioctl_trans *t)
+{
+ return t >= ioctl_start && t < (ioctl_start + ioctl_table_size);
+}
+
+/* Problem:
+ This function cannot unregister duplicate ioctls, because they are not
+ unique.
+ When they happen we need to extend the prototype to pass the handler too. */
+
+int unregister_ioctl32_conversion(unsigned int cmd)
+{
+ unsigned long hash = ioctl32_hash(cmd);
+ struct ioctl_trans *t, *t1;
+
+ down_write(&ioctl32_sem);
+
+ t = ioctl32_hash_table[hash];
+ if (!t) {
+ up_write(&ioctl32_sem);
+ return -EINVAL;
+ }
+
+ if (t->cmd == cmd) {
+ if (builtin_ioctl(t)) {
+ printk("%p tried to unregister builtin ioctl %x\n",
+ __builtin_return_address(0), cmd);
+ } else {
+ ioctl32_hash_table[hash] = t->next;
+ up_write(&ioctl32_sem);
+ kfree(t);
+ return 0;
+ }
+ }
+ while (t->next) {
+ t1 = t->next;
+ if (t1->cmd == cmd) {
+ if (builtin_ioctl(t1)) {
+ printk("%p tried to unregister builtin "
+ "ioctl %x\n",
+ __builtin_return_address(0), cmd);
+ goto out;
+ } else {
+ t->next = t1->next;
+ up_write(&ioctl32_sem);
+ kfree(t1);
+ return 0;
+ }
+ }
+ t = t1;
+ }
+ printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n",
+ cmd);
+out:
+ up_write(&ioctl32_sem);
+ return -EINVAL;
+}
+EXPORT_SYMBOL(unregister_ioctl32_conversion);
+
+static void compat_ioctl_error(struct file *filp, unsigned int fd,
+ unsigned int cmd, unsigned long arg)
+{
+ char buf[10];
+ char *fn = "?";
+ char *path;
+
+ /* find the name of the device. */
+ path = (char *)__get_free_page(GFP_KERNEL);
+ if (path) {
+ fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE);
+ if (IS_ERR(fn))
+ fn = "?";
+ }
+
+ sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
+ if (!isprint(buf[1]))
+ sprintf(buf, "%02x", buf[1]);
+ printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
+ "cmd(%08x){%s} arg(%08x) on %s\n",
+ current->comm, current->pid,
+ (int)fd, (unsigned int)cmd, buf,
+ (unsigned int)arg, fn);
+
+ if (path)
+ free_page((unsigned long)path);
+}
+
+asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
+ unsigned long arg)
+{
+ struct file *filp;
+ int error = -EBADF;
+ struct ioctl_trans *t;
+ int fput_needed;
+
+ filp = fget_light(fd, &fput_needed);
+ if (!filp)
+ goto out;
+
+ /* RED-PEN how should LSM module know it's handling 32bit? */
+ error = security_file_ioctl(filp, cmd, arg);
+ if (error)
+ goto out_fput;
+
+ /*
+ * To allow the compat_ioctl handlers to be self contained
+ * we need to check the common ioctls here first.
+ * Just handle them with the standard handlers below.
+ */
+ switch (cmd) {
+ case FIOCLEX:
+ case FIONCLEX:
+ case FIONBIO:
+ case FIOASYNC:
+ case FIOQSIZE:
+ break;
+
+ case FIBMAP:
+ case FIGETBSZ:
+ case FIONREAD:
+ if (S_ISREG(filp->f_dentry->d_inode->i_mode))
+ break;
+ /*FALL THROUGH*/
+
+ default:
+ if (filp->f_op && filp->f_op->compat_ioctl) {
+ error = filp->f_op->compat_ioctl(filp, cmd, arg);
+ if (error != -ENOIOCTLCMD)
+ goto out_fput;
+ }
+
+ if (!filp->f_op ||
+ (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
+ goto do_ioctl;
+ break;
+ }
+
+ /* When register_ioctl32_conversion is finally gone remove
+ this lock! -AK */
+ down_read(&ioctl32_sem);
+ for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
+ if (t->cmd == cmd)
+ goto found_handler;
+ }
+ up_read(&ioctl32_sem);
+
+ if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) &&
+ cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
+ error = siocdevprivate_ioctl(fd, cmd, arg);
+ } else {
+ static int count;
+
+ if (++count <= 50)
+ compat_ioctl_error(filp, fd, cmd, arg);
+ error = -EINVAL;
+ }
+
+ goto out_fput;
+
+ found_handler:
+ if (t->handler) {
+ lock_kernel();
+ error = t->handler(fd, cmd, arg, filp);
+ unlock_kernel();
+ up_read(&ioctl32_sem);
+ goto out_fput;
+ }
+
+ up_read(&ioctl32_sem);
+ do_ioctl:
+ error = vfs_ioctl(filp, fd, cmd, arg);
+ out_fput:
+ fput_light(filp, fput_needed);
+ out:
+ return error;
+}
+
+static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
+{
+ if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
+ __get_user(kfl->l_type, &ufl->l_type) ||
+ __get_user(kfl->l_whence, &ufl->l_whence) ||
+ __get_user(kfl->l_start, &ufl->l_start) ||
+ __get_user(kfl->l_len, &ufl->l_len) ||
+ __get_user(kfl->l_pid, &ufl->l_pid))
+ return -EFAULT;
+ return 0;
+}
+
+static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
+{
+ if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
+ __put_user(kfl->l_type, &ufl->l_type) ||
+ __put_user(kfl->l_whence, &ufl->l_whence) ||
+ __put_user(kfl->l_start, &ufl->l_start) ||
+ __put_user(kfl->l_len, &ufl->l_len) ||
+ __put_user(kfl->l_pid, &ufl->l_pid))
+ return -EFAULT;
+ return 0;
+}
+
+#ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
+static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
+{
+ if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
+ __get_user(kfl->l_type, &ufl->l_type) ||
+ __get_user(kfl->l_whence, &ufl->l_whence) ||
+ __get_user(kfl->l_start, &ufl->l_start) ||
+ __get_user(kfl->l_len, &ufl->l_len) ||
+ __get_user(kfl->l_pid, &ufl->l_pid))
+ return -EFAULT;
+ return 0;
+}
+#endif
+
+#ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
+static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
+{
+ if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
+ __put_user(kfl->l_type, &ufl->l_type) ||
+ __put_user(kfl->l_whence, &ufl->l_whence) ||
+ __put_user(kfl->l_start, &ufl->l_start) ||
+ __put_user(kfl->l_len, &ufl->l_len) ||
+ __put_user(kfl->l_pid, &ufl->l_pid))
+ return -EFAULT;
+ return 0;
+}
+#endif
+
+asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
+ unsigned long arg)
+{
+ mm_segment_t old_fs;
+ struct flock f;
+ long ret;
+
+ switch (cmd) {
+ case F_GETLK:
+ case F_SETLK:
+ case F_SETLKW:
+ ret = get_compat_flock(&f, compat_ptr(arg));
+ if (ret != 0)
+ break;
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ ret = sys_fcntl(fd, cmd, (unsigned long)&f);
+ set_fs(old_fs);
+ if (cmd == F_GETLK && ret == 0) {
+ if ((f.l_start >= COMPAT_OFF_T_MAX) ||
+ ((f.l_start + f.l_len) > COMPAT_OFF_T_MAX))
+ ret = -EOVERFLOW;
+ if (ret == 0)
+ ret = put_compat_flock(&f, compat_ptr(arg));
+ }
+ break;
+
+ case F_GETLK64:
+ case F_SETLK64:
+ case F_SETLKW64:
+ ret = get_compat_flock64(&f, compat_ptr(arg));
+ if (ret != 0)
+ break;
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
+ ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
+ (unsigned long)&f);
+ set_fs(old_fs);
+ if (cmd == F_GETLK64 && ret == 0) {
+ if ((f.l_start >= COMPAT_LOFF_T_MAX) ||
+ ((f.l_start + f.l_len) > COMPAT_LOFF_T_MAX))
+ ret = -EOVERFLOW;
+ if (ret == 0)
+ ret = put_compat_flock64(&f, compat_ptr(arg));
+ }
+ break;
+
+ default:
+ ret = sys_fcntl(fd, cmd, arg);
+ break;
+ }
+ return ret;
+}
+
+asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
+ unsigned long arg)
+{
+ if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
+ return -EINVAL;
+ return compat_sys_fcntl64(fd, cmd, arg);
+}
+
+asmlinkage long
+compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
+{
+ long ret;
+ aio_context_t ctx64;
+
+ mm_segment_t oldfs = get_fs();
+ if (unlikely(get_user(ctx64, ctx32p)))
+ return -EFAULT;
+
+ set_fs(KERNEL_DS);
+ /* The __user pointer cast is valid because of the set_fs() */
+ ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
+ set_fs(oldfs);
+ /* truncating is ok because it's a user address */
+ if (!ret)
+ ret = put_user((u32) ctx64, ctx32p);
+ return ret;
+}
+
+asmlinkage long
+compat_sys_io_getevents(aio_context_t ctx_id,
+ unsigned long min_nr,
+ unsigned long nr,
+ struct io_event __user *events,
+ struct compat_timespec __user *timeout)
+{
+ long ret;
+ struct timespec t;
+ struct timespec __user *ut = NULL;
+
+ ret = -EFAULT;
+ if (unlikely(!access_ok(VERIFY_WRITE, events,
+ nr * sizeof(struct io_event))))
+ goto out;
+ if (timeout) {
+ if (get_compat_timespec(&t, timeout))
+ goto out;
+
+ ut = compat_alloc_user_space(sizeof(*ut));
+ if (copy_to_user(ut, &t, sizeof(t)) )
+ goto out;
+ }
+ ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
+out:
+ return ret;
+}
+
+static inline long
+copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
+{
+ compat_uptr_t uptr;
+ int i;
+
+ for (i = 0; i < nr; ++i) {
+ if (get_user(uptr, ptr32 + i))
+ return -EFAULT;
+ if (put_user(compat_ptr(uptr), ptr64 + i))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+#define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
+
+asmlinkage long
+compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
+{
+ struct iocb __user * __user *iocb64;
+ long ret;
+
+ if (unlikely(nr < 0))
+ return -EINVAL;
+
+ if (nr > MAX_AIO_SUBMITS)
+ nr = MAX_AIO_SUBMITS;
+
+ iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
+ ret = copy_iocb(nr, iocb, iocb64);
+ if (!ret)
+ ret = sys_io_submit(ctx_id, nr, iocb64);
+ return ret;
+}
+
+struct compat_ncp_mount_data {
+ compat_int_t version;
+ compat_uint_t ncp_fd;
+ compat_uid_t mounted_uid;
+ compat_pid_t wdog_pid;
+ unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
+ compat_uint_t time_out;
+ compat_uint_t retry_count;
+ compat_uint_t flags;
+ compat_uid_t uid;
+ compat_gid_t gid;
+ compat_mode_t file_mode;
+ compat_mode_t dir_mode;
+};
+
+struct compat_ncp_mount_data_v4 {
+ compat_int_t version;
+ compat_ulong_t flags;
+ compat_ulong_t mounted_uid;
+ compat_long_t wdog_pid;
+ compat_uint_t ncp_fd;
+ compat_uint_t time_out;
+ compat_uint_t retry_count;
+ compat_ulong_t uid;
+ compat_ulong_t gid;
+ compat_ulong_t file_mode;
+ compat_ulong_t dir_mode;
+};
+
+static void *do_ncp_super_data_conv(void *raw_data)
+{
+ int version = *(unsigned int *)raw_data;
+
+ if (version == 3) {
+ struct compat_ncp_mount_data *c_n = raw_data;
+ struct ncp_mount_data *n = raw_data;
+
+ n->dir_mode = c_n->dir_mode;
+ n->file_mode = c_n->file_mode;
+ n->gid = c_n->gid;
+ n->uid = c_n->uid;
+ memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
+ n->wdog_pid = c_n->wdog_pid;
+ n->mounted_uid = c_n->mounted_uid;
+ } else if (version == 4) {
+ struct compat_ncp_mount_data_v4 *c_n = raw_data;
+ struct ncp_mount_data_v4 *n = raw_data;
+
+ n->dir_mode = c_n->dir_mode;
+ n->file_mode = c_n->file_mode;
+ n->gid = c_n->gid;
+ n->uid = c_n->uid;
+ n->retry_count = c_n->retry_count;
+ n->time_out = c_n->time_out;
+ n->ncp_fd = c_n->ncp_fd;
+ n->wdog_pid = c_n->wdog_pid;
+ n->mounted_uid = c_n->mounted_uid;
+ n->flags = c_n->flags;
+ } else if (version != 5) {
+ return NULL;
+ }
+
+ return raw_data;
+}
+
+struct compat_smb_mount_data {
+ compat_int_t version;
+ compat_uid_t mounted_uid;
+ compat_uid_t uid;
+ compat_gid_t gid;
+ compat_mode_t file_mode;
+ compat_mode_t dir_mode;
+};
+
+static void *do_smb_super_data_conv(void *raw_data)
+{
+ struct smb_mount_data *s = raw_data;
+ struct compat_smb_mount_data *c_s = raw_data;
+
+ if (c_s->version != SMB_MOUNT_OLDVERSION)
+ goto out;
+ s->dir_mode = c_s->dir_mode;
+ s->file_mode = c_s->file_mode;
+ s->gid = c_s->gid;
+ s->uid = c_s->uid;
+ s->mounted_uid = c_s->mounted_uid;
+ out:
+ return raw_data;
+}
+
+extern int copy_mount_options (const void __user *, unsigned long *);
+
+#define SMBFS_NAME "smbfs"
+#define NCPFS_NAME "ncpfs"
+
+asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
+ char __user * type, unsigned long flags,
+ void __user * data)
+{
+ unsigned long type_page;
+ unsigned long data_page;
+ unsigned long dev_page;
+ char *dir_page;
+ int retval;
+
+ retval = copy_mount_options (type, &type_page);
+ if (retval < 0)
+ goto out;
+
+ dir_page = getname(dir_name);
+ retval = PTR_ERR(dir_page);
+ if (IS_ERR(dir_page))
+ goto out1;
+
+ retval = copy_mount_options (dev_name, &dev_page);
+ if (retval < 0)
+ goto out2;
+
+ retval = copy_mount_options (data, &data_page);
+ if (retval < 0)
+ goto out3;
+
+ retval = -EINVAL;
+
+ if (type_page) {
+ if (!strcmp((char *)type_page, SMBFS_NAME)) {
+ do_smb_super_data_conv((void *)data_page);
+ } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
+ do_ncp_super_data_conv((void *)data_page);
+ }
+ }
+
+ lock_kernel();
+ retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
+ flags, (void*)data_page);
+ unlock_kernel();
+
+ free_page(data_page);
+ out3:
+ free_page(dev_page);
+ out2:
+ putname(dir_page);
+ out1:
+ free_page(type_page);
+ out:
+ return retval;
+}
+
+#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
+#define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
+ ~(sizeof(compat_long_t)-1))
+
+struct compat_old_linux_dirent {
+ compat_ulong_t d_ino;
+ compat_ulong_t d_offset;
+ unsigned short d_namlen;
+ char d_name[1];
+};
+
+struct compat_readdir_callback {
+ struct compat_old_linux_dirent __user *dirent;
+ int result;
+};
+
+static int compat_fillonedir(void *__buf, const char *name, int namlen,
+ loff_t offset, ino_t ino, unsigned int d_type)
+{
+ struct compat_readdir_callback *buf = __buf;
+ struct compat_old_linux_dirent __user *dirent;
+
+ if (buf->result)
+ return -EINVAL;
+ buf->result++;
+ dirent = buf->dirent;
+ if (!access_ok(VERIFY_WRITE, dirent,
+ (unsigned long)(dirent->d_name + namlen + 1) -
+ (unsigned long)dirent))
+ goto efault;
+ if ( __put_user(ino, &dirent->d_ino) ||
+ __put_user(offset, &dirent->d_offset) ||
+ __put_user(namlen, &dirent->d_namlen) ||
+ __copy_to_user(dirent->d_name, name, namlen) ||
+ __put_user(0, dirent->d_name + namlen))
+ goto efault;
+ return 0;
+efault:
+ buf->result = -EFAULT;
+ return -EFAULT;
+}
+
+asmlinkage long compat_sys_old_readdir(unsigned int fd,
+ struct compat_old_linux_dirent __user *dirent, unsigned int count)
+{
+ int error;
+ struct file *file;
+ struct compat_readdir_callback buf;
+
+ error = -EBADF;
+ file = fget(fd);
+ if (!file)
+ goto out;
+
+ buf.result = 0;
+ buf.dirent = dirent;
+
+ error = vfs_readdir(file, compat_fillonedir, &buf);
+ if (error >= 0)
+ error = buf.result;
+
+ fput(file);
+out:
+ return error;
+}
+
+struct compat_linux_dirent {
+ compat_ulong_t d_ino;
+ compat_ulong_t d_off;
+ unsigned short d_reclen;
+ char d_name[1];
+};
+
+struct compat_getdents_callback {
+ struct compat_linux_dirent __user *current_dir;
+ struct compat_linux_dirent __user *previous;
+ int count;
+ int error;
+};
+
+static int compat_filldir(void *__buf, const char *name, int namlen,
+ loff_t offset, ino_t ino, unsigned int d_type)
+{
+ struct compat_linux_dirent __user * dirent;
+ struct compat_getdents_callback *buf = __buf;
+ int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
+
+ buf->error = -EINVAL; /* only used if we fail.. */
+ if (reclen > buf->count)
+ return -EINVAL;
+ dirent = buf->previous;
+ if (dirent) {
+ if (__put_user(offset, &dirent->d_off))
+ goto efault;
+ }
+ dirent = buf->current_dir;
+ if (__put_user(ino, &dirent->d_ino))
+ goto efault;
+ if (__put_user(reclen, &dirent->d_reclen))
+ goto efault;
+ if (copy_to_user(dirent->d_name, name, namlen))
+ goto efault;
+ if (__put_user(0, dirent->d_name + namlen))
+ goto efault;
+ if (__put_user(d_type, (char __user *) dirent + reclen - 1))
+ goto efault;
+ buf->previous = dirent;
+ dirent = (void __user *)dirent + reclen;
+ buf->current_dir = dirent;
+ buf->count -= reclen;
+ return 0;
+efault:
+ buf->error = -EFAULT;
+ return -EFAULT;
+}
+
+asmlinkage long compat_sys_getdents(unsigned int fd,
+ struct compat_linux_dirent __user *dirent, unsigned int count)
+{
+ struct file * file;
+ struct compat_linux_dirent __user * lastdirent;
+ struct compat_getdents_callback buf;
+ int error;
+
+ error = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, dirent, count))
+ goto out;
+
+ error = -EBADF;
+ file = fget(fd);
+ if (!file)
+ goto out;
+
+ buf.current_dir = dirent;
+ buf.previous = NULL;
+ buf.count = count;
+ buf.error = 0;
+
+ error = vfs_readdir(file, compat_filldir, &buf);
+ if (error < 0)
+ goto out_putf;
+ error = buf.error;
+ lastdirent = buf.previous;
+ if (lastdirent) {
+ if (put_user(file->f_pos, &lastdirent->d_off))
+ error = -EFAULT;
+ else
+ error = count - buf.count;
+ }
+
+out_putf:
+ fput(file);
+out:
+ return error;
+}
+
+#ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
+#define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
+
+struct compat_getdents_callback64 {
+ struct linux_dirent64 __user *current_dir;
+ struct linux_dirent64 __user *previous;
+ int count;
+ int error;
+};
+
+static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
+ ino_t ino, unsigned int d_type)
+{
+ struct linux_dirent64 __user *dirent;
+ struct compat_getdents_callback64 *buf = __buf;
+ int jj = NAME_OFFSET(dirent);
+ int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
+ u64 off;
+
+ buf->error = -EINVAL; /* only used if we fail.. */
+ if (reclen > buf->count)
+ return -EINVAL;
+ dirent = buf->previous;
+
+ if (dirent) {
+ if (__put_user_unaligned(offset, &dirent->d_off))
+ goto efault;
+ }
+ dirent = buf->current_dir;
+ if (__put_user_unaligned(ino, &dirent->d_ino))
+ goto efault;
+ off = 0;
+ if (__put_user_unaligned(off, &dirent->d_off))
+ goto efault;
+ if (__put_user(reclen, &dirent->d_reclen))
+ goto efault;
+ if (__put_user(d_type, &dirent->d_type))
+ goto efault;
+ if (copy_to_user(dirent->d_name, name, namlen))
+ goto efault;
+ if (__put_user(0, dirent->d_name + namlen))
+ goto efault;
+ buf->previous = dirent;
+ dirent = (void __user *)dirent + reclen;
+ buf->current_dir = dirent;
+ buf->count -= reclen;
+ return 0;
+efault:
+ buf->error = -EFAULT;
+ return -EFAULT;
+}
+
+asmlinkage long compat_sys_getdents64(unsigned int fd,
+ struct linux_dirent64 __user * dirent, unsigned int count)
+{
+ struct file * file;
+ struct linux_dirent64 __user * lastdirent;
+ struct compat_getdents_callback64 buf;
+ int error;
+
+ error = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, dirent, count))
+ goto out;
+
+ error = -EBADF;
+ file = fget(fd);
+ if (!file)
+ goto out;
+
+ buf.current_dir = dirent;
+ buf.previous = NULL;
+ buf.count = count;
+ buf.error = 0;
+
+ error = vfs_readdir(file, compat_filldir64, &buf);
+ if (error < 0)
+ goto out_putf;
+ error = buf.error;
+ lastdirent = buf.previous;
+ if (lastdirent) {
+ typeof(lastdirent->d_off) d_off = file->f_pos;
+ __put_user_unaligned(d_off, &lastdirent->d_off);
+ error = count - buf.count;
+ }
+
+out_putf:
+ fput(file);
+out:
+ return error;
+}
+#endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
+
+static ssize_t compat_do_readv_writev(int type, struct file *file,
+ const struct compat_iovec __user *uvector,
+ unsigned long nr_segs, loff_t *pos)
+{
+ typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
+ typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
+
+ compat_ssize_t tot_len;
+ struct iovec iovstack[UIO_FASTIOV];
+ struct iovec *iov=iovstack, *vector;
+ ssize_t ret;
+ int seg;
+ io_fn_t fn;
+ iov_fn_t fnv;
+
+ /*
+ * SuS says "The readv() function *may* fail if the iovcnt argument
+ * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
+ * traditionally returned zero for zero segments, so...
+ */
+ ret = 0;
+ if (nr_segs == 0)
+ goto out;
+
+ /*
+ * First get the "struct iovec" from user memory and
+ * verify all the pointers
+ */
+ ret = -EINVAL;
+ if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
+ goto out;
+ if (!file->f_op)
+ goto out;
+ if (nr_segs > UIO_FASTIOV) {
+ ret = -ENOMEM;
+ iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
+ if (!iov)
+ goto out;
+ }
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
+ goto out;
+
+ /*
+ * Single unix specification:
+ * We should -EINVAL if an element length is not >= 0 and fitting an
+ * ssize_t. The total length is fitting an ssize_t
+ *
+ * Be careful here because iov_len is a size_t not an ssize_t
+ */
+ tot_len = 0;
+ vector = iov;
+ ret = -EINVAL;
+ for (seg = 0 ; seg < nr_segs; seg++) {
+ compat_ssize_t tmp = tot_len;
+ compat_ssize_t len;
+ compat_uptr_t buf;
+
+ if (__get_user(len, &uvector->iov_len) ||
+ __get_user(buf, &uvector->iov_base)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (len < 0) /* size_t not fitting an compat_ssize_t .. */
+ goto out;
+ tot_len += len;
+ if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
+ goto out;
+ vector->iov_base = compat_ptr(buf);
+ vector->iov_len = (compat_size_t) len;
+ uvector++;
+ vector++;
+ }
+ if (tot_len == 0) {
+ ret = 0;
+ goto out;
+ }
+
+ ret = rw_verify_area(type, file, pos, tot_len);
+ if (ret)
+ goto out;
+
+ fnv = NULL;
+ if (type == READ) {
+ fn = file->f_op->read;
+ fnv = file->f_op->readv;
+ } else {
+ fn = (io_fn_t)file->f_op->write;
+ fnv = file->f_op->writev;
+ }
+ if (fnv) {
+ ret = fnv(file, iov, nr_segs, pos);
+ goto out;
+ }
+
+ /* Do it by hand, with file-ops */
+ ret = 0;
+ vector = iov;
+ while (nr_segs > 0) {
+ void __user * base;
+ size_t len;
+ ssize_t nr;
+
+ base = vector->iov_base;
+ len = vector->iov_len;
+ vector++;
+ nr_segs--;
+
+ nr = fn(file, base, len, pos);
+
+ if (nr < 0) {
+ if (!ret) ret = nr;
+ break;
+ }
+ ret += nr;
+ if (nr != len)
+ break;
+ }
+out:
+ if (iov != iovstack)
+ kfree(iov);
+ if ((ret + (type == READ)) > 0)
+ dnotify_parent(file->f_dentry,
+ (type == READ) ? DN_ACCESS : DN_MODIFY);
+ return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
+{
+ struct file *file;
+ ssize_t ret = -EBADF;
+
+ file = fget(fd);
+ if (!file)
+ return -EBADF;
+
+ if (!(file->f_mode & FMODE_READ))
+ goto out;
+
+ ret = -EINVAL;
+ if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
+ goto out;
+
+ ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
+
+out:
+ fput(file);
+ return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
+{
+ struct file *file;
+ ssize_t ret = -EBADF;
+
+ file = fget(fd);
+ if (!file)
+ return -EBADF;
+ if (!(file->f_mode & FMODE_WRITE))
+ goto out;
+
+ ret = -EINVAL;
+ if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
+ goto out;
+
+ ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
+
+out:
+ fput(file);
+ return ret;
+}
+
+/*
+ * compat_count() counts the number of arguments/envelopes. It is basically
+ * a copy of count() from fs/exec.c, except that it works with 32 bit argv
+ * and envp pointers.
+ */
+static int compat_count(compat_uptr_t __user *argv, int max)
+{
+ int i = 0;
+
+ if (argv != NULL) {
+ for (;;) {
+ compat_uptr_t p;
+
+ if (get_user(p, argv))
+ return -EFAULT;
+ if (!p)
+ break;
+ argv++;
+ if(++i > max)
+ return -E2BIG;
+ }
+ }
+ return i;
+}
+
+/*
+ * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
+ * except that it works with 32 bit argv and envp pointers.
+ */
+static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
+ struct linux_binprm *bprm)
+{
+ struct page *kmapped_page = NULL;
+ char *kaddr = NULL;
+ int ret;
+
+ while (argc-- > 0) {
+ compat_uptr_t str;
+ int len;
+ unsigned long pos;
+
+ if (get_user(str, argv+argc) ||
+ !(len = strnlen_user(compat_ptr(str), bprm->p))) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ if (bprm->p < len) {
+ ret = -E2BIG;
+ goto out;
+ }
+
+ bprm->p -= len;
+ /* XXX: add architecture specific overflow check here. */
+ pos = bprm->p;
+
+ while (len > 0) {
+ int i, new, err;
+ int offset, bytes_to_copy;
+ struct page *page;
+
+ offset = pos % PAGE_SIZE;
+ i = pos/PAGE_SIZE;
+ page = bprm->page[i];
+ new = 0;
+ if (!page) {
+ page = alloc_page(GFP_HIGHUSER);
+ bprm->page[i] = page;
+ if (!page) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ new = 1;
+ }
+
+ if (page != kmapped_page) {
+ if (kmapped_page)
+ kunmap(kmapped_page);
+ kmapped_page = page;
+ kaddr = kmap(kmapped_page);
+ }
+ if (new && offset)
+ memset(kaddr, 0, offset);
+ bytes_to_copy = PAGE_SIZE - offset;
+ if (bytes_to_copy > len) {
+ bytes_to_copy = len;
+ if (new)
+ memset(kaddr+offset+len, 0,
+ PAGE_SIZE-offset-len);
+ }
+ err = copy_from_user(kaddr+offset, compat_ptr(str),
+ bytes_to_copy);
+ if (err) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ pos += bytes_to_copy;
+ str += bytes_to_copy;
+ len -= bytes_to_copy;
+ }
+ }
+ ret = 0;
+out:
+ if (kmapped_page)
+ kunmap(kmapped_page);
+ return ret;
+}
+
+#ifdef CONFIG_MMU
+
+#define free_arg_pages(bprm) do { } while (0)
+
+#else
+
+static inline void free_arg_pages(struct linux_binprm *bprm)
+{
+ int i;
+
+ for (i = 0; i < MAX_ARG_PAGES; i++) {
+ if (bprm->page[i])
+ __free_page(bprm->page[i]);
+ bprm->page[i] = NULL;
+ }
+}
+
+#endif /* CONFIG_MMU */
+
+/*
+ * compat_do_execve() is mostly a copy of do_execve(), with the exception
+ * that it processes 32 bit argv and envp pointers.
+ */
+int compat_do_execve(char * filename,
+ compat_uptr_t __user *argv,
+ compat_uptr_t __user *envp,
+ struct pt_regs * regs)
+{
+ struct linux_binprm *bprm;
+ struct file *file;
+ int retval;
+ int i;
+
+ retval = -ENOMEM;
+ bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
+ if (!bprm)
+ goto out_ret;
+ memset(bprm, 0, sizeof(*bprm));
+
+ file = open_exec(filename);
+ retval = PTR_ERR(file);
+ if (IS_ERR(file))
+ goto out_kfree;
+
+ sched_exec();
+
+ bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
+ bprm->file = file;
+ bprm->filename = filename;
+ bprm->interp = filename;
+ bprm->mm = mm_alloc();
+ retval = -ENOMEM;
+ if (!bprm->mm)
+ goto out_file;
+
+ retval = init_new_context(current, bprm->mm);
+ if (retval < 0)
+ goto out_mm;
+
+ bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
+ if ((retval = bprm->argc) < 0)
+ goto out_mm;
+
+ bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
+ if ((retval = bprm->envc) < 0)
+ goto out_mm;
+
+ retval = security_bprm_alloc(bprm);
+ if (retval)
+ goto out;
+
+ retval = prepare_binprm(bprm);
+ if (retval < 0)
+ goto out;
+
+ retval = copy_strings_kernel(1, &bprm->filename, bprm);
+ if (retval < 0)
+ goto out;
+
+ bprm->exec = bprm->p;
+ retval = compat_copy_strings(bprm->envc, envp, bprm);
+ if (retval < 0)
+ goto out;
+
+ retval = compat_copy_strings(bprm->argc, argv, bprm);
+ if (retval < 0)
+ goto out;
+
+ retval = search_binary_handler(bprm, regs);
+ if (retval >= 0) {
+ free_arg_pages(bprm);
+
+ /* execve success */
+ security_bprm_free(bprm);
+ kfree(bprm);
+ return retval;
+ }
+
+out:
+ /* Something went wrong, return the inode and free the argument pages*/
+ for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
+ struct page * page = bprm->page[i];
+ if (page)
+ __free_page(page);
+ }
+
+ if (bprm->security)
+ security_bprm_free(bprm);
+
+out_mm:
+ if (bprm->mm)
+ mmdrop(bprm->mm);
+
+out_file:
+ if (bprm->file) {
+ allow_write_access(bprm->file);
+ fput(bprm->file);
+ }
+
+out_kfree:
+ kfree(bprm);
+
+out_ret:
+ return retval;
+}
+
+#define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
+
+#define ROUND_UP(x,y) (((x)+(y)-1)/(y))
+
+/*
+ * Ooo, nasty. We need here to frob 32-bit unsigned longs to
+ * 64-bit unsigned longs.
+ */
+static inline
+int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+ unsigned long *fdset)
+{
+ nr = ROUND_UP(nr, __COMPAT_NFDBITS);
+ if (ufdset) {
+ unsigned long odd;
+
+ if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
+ return -EFAULT;
+
+ odd = nr & 1UL;
+ nr &= ~1UL;
+ while (nr) {
+ unsigned long h, l;
+ __get_user(l, ufdset);
+ __get_user(h, ufdset+1);
+ ufdset += 2;
+ *fdset++ = h << 32 | l;
+ nr -= 2;
+ }
+ if (odd)
+ __get_user(*fdset, ufdset);
+ } else {
+ /* Tricky, must clear full unsigned long in the
+ * kernel fdset at the end, this makes sure that
+ * actually happens.
+ */
+ memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
+ }
+ return 0;
+}
+
+static inline
+void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+ unsigned long *fdset)
+{
+ unsigned long odd;
+ nr = ROUND_UP(nr, __COMPAT_NFDBITS);
+
+ if (!ufdset)
+ return;
+
+ odd = nr & 1UL;
+ nr &= ~1UL;
+ while (nr) {
+ unsigned long h, l;
+ l = *fdset++;
+ h = l >> 32;
+ __put_user(l, ufdset);
+ __put_user(h, ufdset+1);
+ ufdset += 2;
+ nr -= 2;
+ }
+ if (odd)
+ __put_user(*fdset, ufdset);
+}
+
+
+/*
+ * This is a virtual copy of sys_select from fs/select.c and probably
+ * should be compared to it from time to time
+ */
+static void *select_bits_alloc(int size)
+{
+ return kmalloc(6 * size, GFP_KERNEL);
+}
+
+static void select_bits_free(void *bits, int size)
+{
+ kfree(bits);
+}
+
+/*
+ * We can actually return ERESTARTSYS instead of EINTR, but I'd
+ * like to be certain this leads to no problems. So I return
+ * EINTR just for safety.
+ *
+ * Update: ERESTARTSYS breaks at least the xview clock binary, so
+ * I'm trying ERESTARTNOHAND which restart only when you want to.
+ */
+#define MAX_SELECT_SECONDS \
+ ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
+
+asmlinkage long
+compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp,
+ compat_ulong_t __user *exp, struct compat_timeval __user *tvp)
+{
+ fd_set_bits fds;
+ char *bits;
+ long timeout;
+ int size, max_fdset, ret = -EINVAL;
+
+ timeout = MAX_SCHEDULE_TIMEOUT;
+ if (tvp) {
+ time_t sec, usec;
+
+ if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
+ || __get_user(sec, &tvp->tv_sec)
+ || __get_user(usec, &tvp->tv_usec)) {
+ ret = -EFAULT;
+ goto out_nofds;
+ }
+
+ if (sec < 0 || usec < 0)
+ goto out_nofds;
+
+ if ((unsigned long) sec < MAX_SELECT_SECONDS) {
+ timeout = ROUND_UP(usec, 1000000/HZ);
+ timeout += sec * (unsigned long) HZ;
+ }
+ }
+
+ if (n < 0)
+ goto out_nofds;
+
+ /* max_fdset can increase, so grab it once to avoid race */
+ max_fdset = current->files->max_fdset;
+ if (n > max_fdset)
+ n = max_fdset;
+
+ /*
+ * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
+ * since we used fdset we need to allocate memory in units of
+ * long-words.
+ */
+ ret = -ENOMEM;
+ size = FDS_BYTES(n);
+ bits = select_bits_alloc(size);
+ if (!bits)
+ goto out_nofds;
+ fds.in = (unsigned long *) bits;
+ fds.out = (unsigned long *) (bits + size);
+ fds.ex = (unsigned long *) (bits + 2*size);
+ fds.res_in = (unsigned long *) (bits + 3*size);
+ fds.res_out = (unsigned long *) (bits + 4*size);
+ fds.res_ex = (unsigned long *) (bits + 5*size);
+
+ if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
+ (ret = compat_get_fd_set(n, outp, fds.out)) ||
+ (ret = compat_get_fd_set(n, exp, fds.ex)))
+ goto out;
+ zero_fd_set(n, fds.res_in);
+ zero_fd_set(n, fds.res_out);
+ zero_fd_set(n, fds.res_ex);
+
+ ret = do_select(n, &fds, &timeout);
+
+ if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
+ time_t sec = 0, usec = 0;
+ if (timeout) {
+ sec = timeout / HZ;
+ usec = timeout % HZ;
+ usec *= (1000000/HZ);
+ }
+ if (put_user(sec, &tvp->tv_sec) ||
+ put_user(usec, &tvp->tv_usec))
+ ret = -EFAULT;
+ }
+
+ if (ret < 0)
+ goto out;
+ if (!ret) {
+ ret = -ERESTARTNOHAND;
+ if (signal_pending(current))
+ goto out;
+ ret = 0;
+ }
+
+ compat_set_fd_set(n, inp, fds.res_in);
+ compat_set_fd_set(n, outp, fds.res_out);
+ compat_set_fd_set(n, exp, fds.res_ex);
+
+out:
+ select_bits_free(bits, size);
+out_nofds:
+ return ret;
+}
+
+#if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
+/* Stuff for NFS server syscalls... */
+struct compat_nfsctl_svc {
+ u16 svc32_port;
+ s32 svc32_nthreads;
+};
+
+struct compat_nfsctl_client {
+ s8 cl32_ident[NFSCLNT_IDMAX+1];
+ s32 cl32_naddr;
+ struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
+ s32 cl32_fhkeytype;
+ s32 cl32_fhkeylen;
+ u8 cl32_fhkey[NFSCLNT_KEYMAX];
+};
+
+struct compat_nfsctl_export {
+ char ex32_client[NFSCLNT_IDMAX+1];
+ char ex32_path[NFS_MAXPATHLEN+1];
+ compat_dev_t ex32_dev;
+ compat_ino_t ex32_ino;
+ compat_int_t ex32_flags;
+ compat_uid_t ex32_anon_uid;
+ compat_gid_t ex32_anon_gid;
+};
+
+struct compat_nfsctl_fdparm {
+ struct sockaddr gd32_addr;
+ s8 gd32_path[NFS_MAXPATHLEN+1];
+ compat_int_t gd32_version;
+};
+
+struct compat_nfsctl_fsparm {
+ struct sockaddr gd32_addr;
+ s8 gd32_path[NFS_MAXPATHLEN+1];
+ compat_int_t gd32_maxlen;
+};
+
+struct compat_nfsctl_arg {
+ compat_int_t ca32_version; /* safeguard */
+ union {
+ struct compat_nfsctl_svc u32_svc;
+ struct compat_nfsctl_client u32_client;
+ struct compat_nfsctl_export u32_export;
+ struct compat_nfsctl_fdparm u32_getfd;
+ struct compat_nfsctl_fsparm u32_getfs;
+ } u;
+#define ca32_svc u.u32_svc
+#define ca32_client u.u32_client
+#define ca32_export u.u32_export
+#define ca32_getfd u.u32_getfd
+#define ca32_getfs u.u32_getfs
+};
+
+union compat_nfsctl_res {
+ __u8 cr32_getfh[NFS_FHSIZE];
+ struct knfsd_fh cr32_getfs;
+};
+
+static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
+ err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
+ return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __copy_from_user(&karg->ca_client.cl_ident[0],
+ &arg->ca32_client.cl32_ident[0],
+ NFSCLNT_IDMAX);
+ err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
+ err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
+ &arg->ca32_client.cl32_addrlist[0],
+ (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
+ err |= __get_user(karg->ca_client.cl_fhkeytype,
+ &arg->ca32_client.cl32_fhkeytype);
+ err |= __get_user(karg->ca_client.cl_fhkeylen,
+ &arg->ca32_client.cl32_fhkeylen);
+ err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
+ &arg->ca32_client.cl32_fhkey[0],
+ NFSCLNT_KEYMAX);
+
+ return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __copy_from_user(&karg->ca_export.ex_client[0],
+ &arg->ca32_export.ex32_client[0],
+ NFSCLNT_IDMAX);
+ err |= __copy_from_user(&karg->ca_export.ex_path[0],
+ &arg->ca32_export.ex32_path[0],
+ NFS_MAXPATHLEN);
+ err |= __get_user(karg->ca_export.ex_dev,
+ &arg->ca32_export.ex32_dev);
+ err |= __get_user(karg->ca_export.ex_ino,
+ &arg->ca32_export.ex32_ino);
+ err |= __get_user(karg->ca_export.ex_flags,
+ &arg->ca32_export.ex32_flags);
+ err |= __get_user(karg->ca_export.ex_anon_uid,
+ &arg->ca32_export.ex32_anon_uid);
+ err |= __get_user(karg->ca_export.ex_anon_gid,
+ &arg->ca32_export.ex32_anon_gid);
+ SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
+ SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
+
+ return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __copy_from_user(&karg->ca_getfd.gd_addr,
+ &arg->ca32_getfd.gd32_addr,
+ (sizeof(struct sockaddr)));
+ err |= __copy_from_user(&karg->ca_getfd.gd_path,
+ &arg->ca32_getfd.gd32_path,
+ (NFS_MAXPATHLEN+1));
+ err |= __get_user(karg->ca_getfd.gd_version,
+ &arg->ca32_getfd.gd32_version);
+
+ return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+ int err;
+
+ err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
+ err |= get_user(karg->ca_version, &arg->ca32_version);
+ err |= __copy_from_user(&karg->ca_getfs.gd_addr,
+ &arg->ca32_getfs.gd32_addr,
+ (sizeof(struct sockaddr)));
+ err |= __copy_from_user(&karg->ca_getfs.gd_path,
+ &arg->ca32_getfs.gd32_path,
+ (NFS_MAXPATHLEN+1));
+ err |= __get_user(karg->ca_getfs.gd_maxlen,
+ &arg->ca32_getfs.gd32_maxlen);
+
+ return (err) ? -EFAULT : 0;
+}
+
+/* This really doesn't need translations, we are only passing
+ * back a union which contains opaque nfs file handle data.
+ */
+static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res)
+{
+ int err;
+
+ err = copy_to_user(res, kres, sizeof(*res));
+
+ return (err) ? -EFAULT : 0;
+}
+
+asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg,
+ union compat_nfsctl_res __user *res)
+{
+ struct nfsctl_arg *karg;
+ union nfsctl_res *kres;
+ mm_segment_t oldfs;
+ int err;
+
+ karg = kmalloc(sizeof(*karg), GFP_USER);
+ kres = kmalloc(sizeof(*kres), GFP_USER);
+ if(!karg || !kres) {
+ err = -ENOMEM;
+ goto done;
+ }
+
+ switch(cmd) {
+ case NFSCTL_SVC:
+ err = compat_nfs_svc_trans(karg, arg);
+ break;
+
+ case NFSCTL_ADDCLIENT:
+ err = compat_nfs_clnt_trans(karg, arg);
+ break;
+
+ case NFSCTL_DELCLIENT:
+ err = compat_nfs_clnt_trans(karg, arg);
+ break;
+
+ case NFSCTL_EXPORT:
+ case NFSCTL_UNEXPORT:
+ err = compat_nfs_exp_trans(karg, arg);
+ break;
+
+ case NFSCTL_GETFD:
+ err = compat_nfs_getfd_trans(karg, arg);
+ break;
+
+ case NFSCTL_GETFS:
+ err = compat_nfs_getfs_trans(karg, arg);
+ break;
+
+ default:
+ err = -EINVAL;
+ goto done;
+ }
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ /* The __user pointer casts are valid because of the set_fs() */
+ err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
+ set_fs(oldfs);
+
+ if (err)
+ goto done;
+
+ if((cmd == NFSCTL_GETFD) ||
+ (cmd == NFSCTL_GETFS))
+ err = compat_nfs_getfh_res_trans(kres, res);
+
+done:
+ kfree(karg);
+ kfree(kres);
+ return err;
+}
+#else /* !NFSD */
+long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
+{
+ return sys_ni_syscall();
+}
+#endif