* 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)
+ * Copyright (C) 2003 Pavel Machek (pavel@ucw.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/stddef.h>
#include <linux/kernel.h>
#include <linux/linkage.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/ioctl.h>
#include <linux/init.h>
-#include <linux/smb.h>
-#include <linux/smb_mount.h>
#include <linux/ncp_mount.h>
#include <linux/nfs4_mount.h>
#include <linux/syscalls.h>
#include <linux/mm.h>
#include <linux/eventpoll.h>
#include <linux/fs_struct.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.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)
+asmlinkage long compat_sys_utime(const char __user *filename,
+ struct compat_utimbuf __user *t)
{
struct timespec tv[2];
return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
}
-asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags)
+asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags)
{
struct timespec tv[2];
return do_utimes(dfd, filename, t ? tv : NULL, flags);
}
-asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
+asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t)
{
struct timespec tv[2];
return do_utimes(dfd, filename, t ? tv : NULL, 0);
}
-asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
+asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t)
{
return compat_sys_futimesat(AT_FDCWD, filename, t);
}
return err;
}
-asmlinkage long compat_sys_newstat(char __user * filename,
+asmlinkage long compat_sys_newstat(const char __user * filename,
struct compat_stat __user *statbuf)
{
struct kstat stat;
return cp_compat_stat(&stat, statbuf);
}
-asmlinkage long compat_sys_newlstat(char __user * filename,
+asmlinkage long compat_sys_newlstat(const char __user * filename,
struct compat_stat __user *statbuf)
{
struct kstat stat;
}
#ifndef __ARCH_WANT_STAT64
-asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
+asmlinkage long compat_sys_newfstatat(unsigned int dfd,
+ const char __user *filename,
struct compat_stat __user *statbuf, int flag)
{
struct kstat stat;
}
/*
- * The following statfs calls are copies of code from fs/open.c and
+ * The following statfs calls are copies of code from fs/statfs.c and
* should be checked against those from time to time
*/
asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
error = user_path(pathname, &path);
if (!error) {
struct kstatfs tmp;
- error = vfs_statfs(path.dentry, &tmp);
+ error = vfs_statfs(&path, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
path_put(&path);
file = fget(fd);
if (!file)
goto out;
- error = vfs_statfs(file->f_path.dentry, &tmp);
+ error = vfs_statfs(&file->f_path, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
fput(file);
__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(kbuf->f_frsize, &ubuf->f_frsize) ||
+ __put_user(kbuf->f_flags, &ubuf->f_flags) ||
+ __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
return -EFAULT;
return 0;
}
error = user_path(pathname, &path);
if (!error) {
struct kstatfs tmp;
- error = vfs_statfs(path.dentry, &tmp);
+ error = vfs_statfs(&path, &tmp);
if (!error)
error = put_compat_statfs64(buf, &tmp);
path_put(&path);
file = fget(fd);
if (!file)
goto out;
- error = vfs_statfs(file->f_path.dentry, &tmp);
+ error = vfs_statfs(&file->f_path, &tmp);
if (!error)
error = put_compat_statfs64(buf, &tmp);
fput(file);
sb = user_get_super(new_decode_dev(dev));
if (!sb)
return -EINVAL;
- err = vfs_statfs(sb->s_root, &sbuf);
+ err = statfs_by_dentry(sb->s_root, &sbuf);
drop_super(sb);
if (err)
return err;
return ret;
}
+/* A write operation does a read from user space and vice versa */
+#define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
+
+ssize_t compat_rw_copy_check_uvector(int type,
+ const struct compat_iovec __user *uvector, unsigned long nr_segs,
+ unsigned long fast_segs, struct iovec *fast_pointer,
+ struct iovec **ret_pointer)
+{
+ compat_ssize_t tot_len;
+ struct iovec *iov = *ret_pointer = fast_pointer;
+ ssize_t ret = 0;
+ int seg;
+
+ /*
+ * 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...
+ */
+ if (nr_segs == 0)
+ goto out;
+
+ ret = -EINVAL;
+ if (nr_segs > UIO_MAXIOV || nr_segs < 0)
+ goto out;
+ if (nr_segs > fast_segs) {
+ ret = -ENOMEM;
+ iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
+ if (iov == NULL)
+ goto out;
+ }
+ *ret_pointer = iov;
+
+ /*
+ * Single unix specification:
+ * We should -EINVAL if an element length is not >= 0 and fitting an
+ * ssize_t.
+ *
+ * In Linux, the total length is limited to MAX_RW_COUNT, there is
+ * no overflow possibility.
+ */
+ tot_len = 0;
+ ret = -EINVAL;
+ for (seg = 0; seg < nr_segs; seg++) {
+ compat_uptr_t buf;
+ compat_ssize_t len;
+
+ if (__get_user(len, &uvector->iov_len) ||
+ __get_user(buf, &uvector->iov_base)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (len < 0) /* size_t not fitting in compat_ssize_t .. */
+ goto out;
+ if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (len > MAX_RW_COUNT - tot_len)
+ len = MAX_RW_COUNT - tot_len;
+ tot_len += len;
+ iov->iov_base = compat_ptr(buf);
+ iov->iov_len = (compat_size_t) len;
+ uvector++;
+ iov++;
+ }
+ ret = tot_len;
+
+out:
+ return ret;
+}
+
static inline long
copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
{
iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
ret = copy_iocb(nr, iocb, iocb64);
if (!ret)
- ret = sys_io_submit(ctx_id, nr, iocb64);
+ ret = do_io_submit(ctx_id, nr, iocb64, 1);
return ret;
}
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;
-}
struct compat_nfs_string {
compat_uint_t len;
return 0;
}
-#define SMBFS_NAME "smbfs"
#define NCPFS_NAME "ncpfs"
#define NFS4_NAME "nfs4"
-asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
- char __user * type, unsigned long flags,
- void __user * data)
+asmlinkage long compat_sys_mount(const char __user * dev_name,
+ const char __user * dir_name,
+ const char __user * type, unsigned long flags,
+ const void __user * data)
{
char *kernel_type;
unsigned long data_page;
retval = -EINVAL;
if (kernel_type && data_page) {
- if (!strcmp(kernel_type, SMBFS_NAME)) {
- do_smb_super_data_conv((void *)data_page);
- } else if (!strcmp(kernel_type, NCPFS_NAME)) {
+ if (!strcmp(kernel_type, NCPFS_NAME)) {
do_ncp_super_data_conv((void *)data_page);
} else if (!strcmp(kernel_type, NFS4_NAME)) {
if (do_nfs4_super_data_conv((void *) data_page))
return retval;
}
-#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
-
struct compat_old_linux_dirent {
compat_ulong_t d_ino;
compat_ulong_t d_offset;
struct compat_linux_dirent __user * dirent;
struct compat_getdents_callback *buf = __buf;
compat_ulong_t d_ino;
- int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
+ int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) +
+ namlen + 2, sizeof(compat_long_t));
buf->error = -EINVAL; /* only used if we fail.. */
if (reclen > buf->count)
{
struct linux_dirent64 __user *dirent;
struct compat_getdents_callback64 *buf = __buf;
- int jj = NAME_OFFSET(dirent);
- int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
+ int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1,
+ sizeof(u64));
u64 off;
buf->error = -EINVAL; /* only used if we fail.. */
{
compat_ssize_t tot_len;
struct iovec iovstack[UIO_FASTIOV];
- struct iovec *iov=iovstack, *vector;
+ struct iovec *iov = iovstack;
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++;
- }
+ tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs,
+ UIO_FASTIOV, iovstack, &iov);
if (tot_len == 0) {
ret = 0;
goto out;
if (iov != iovstack)
kfree(iov);
if ((ret + (type == READ)) > 0) {
- struct dentry *dentry = file->f_path.dentry;
if (type == READ)
- fsnotify_access(dentry);
+ fsnotify_access(file);
else
- fsnotify_modify(dentry);
+ fsnotify_modify(file);
}
return ret;
}
file = fget_light(fd, &fput_needed);
if (!file)
return -EBADF;
- ret = compat_readv(file, vec, vlen, &pos);
+ ret = -ESPIPE;
+ if (file->f_mode & FMODE_PREAD)
+ ret = compat_readv(file, vec, vlen, &pos);
fput_light(file, fput_needed);
return ret;
}
file = fget_light(fd, &fput_needed);
if (!file)
return -EBADF;
- ret = compat_writev(file, vec, vlen, &pos);
+ ret = -ESPIPE;
+ if (file->f_mode & FMODE_PWRITE)
+ ret = compat_writev(file, vec, vlen, &pos);
fput_light(file, fput_needed);
return ret;
}
argv++;
if (i++ >= max)
return -E2BIG;
+
+ if (fatal_signal_pending(current))
+ return -ERESTARTNOHAND;
+ cond_resched();
}
}
return i;
while (len > 0) {
int offset, bytes_to_copy;
+ if (fatal_signal_pending(current)) {
+ ret = -ERESTARTNOHAND;
+ goto out;
+ }
+ cond_resched();
+
offset = pos % PAGE_SIZE;
if (offset == 0)
offset = PAGE_SIZE;
if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
struct page *page;
-#ifdef CONFIG_STACK_GROWSUP
- ret = expand_stack_downwards(bprm->vma, pos);
- if (ret < 0) {
- /* We've exceed the stack rlimit. */
- ret = -E2BIG;
- goto out;
- }
-#endif
- ret = get_user_pages(current, bprm->mm, pos,
- 1, 1, 1, &page, NULL);
- if (ret <= 0) {
- /* We've exceed the stack rlimit. */
+ page = get_arg_page(bprm, pos, 1);
+ if (!page) {
ret = -E2BIG;
goto out;
}
if (retval < 0)
goto out;
- current->stack_start = current->mm->start_stack;
-
/* execve succeeded */
current->fs->in_exec = 0;
current->in_execve = 0;
return retval;
out:
- if (bprm->mm)
+ if (bprm->mm) {
+ acct_arg_size(bprm, 0);
mmput(bprm->mm);
+ }
out_file:
if (bprm->file) {
}
#endif /* HAVE_SET_RESTORE_SIGMASK */
-#if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
+#if (defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)) && !defined(CONFIG_NFSD_DEPRECATED)
/* Stuff for NFS server syscalls... */
struct compat_nfsctl_svc {
u16 svc32_port;
projects / linux-flexiantxendom0-natty.git / blobdiff