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Diffstat (limited to 'fs/compat.c')
-rw-r--r--fs/compat.c122
1 files changed, 70 insertions, 52 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 6161255fac4..015e1e1f87c 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -776,16 +776,16 @@ asmlinkage long compat_sys_mount(const char __user * dev_name,
char *kernel_type;
unsigned long data_page;
char *kernel_dev;
- char *dir_page;
+ struct filename *dir;
int retval;
retval = copy_mount_string(type, &kernel_type);
if (retval < 0)
goto out;
- dir_page = getname(dir_name);
- retval = PTR_ERR(dir_page);
- if (IS_ERR(dir_page))
+ dir = getname(dir_name);
+ retval = PTR_ERR(dir);
+ if (IS_ERR(dir))
goto out1;
retval = copy_mount_string(dev_name, &kernel_dev);
@@ -807,7 +807,7 @@ asmlinkage long compat_sys_mount(const char __user * dev_name,
}
}
- retval = do_mount(kernel_dev, dir_page, kernel_type,
+ retval = do_mount(kernel_dev, dir->name, kernel_type,
flags, (void*)data_page);
out4:
@@ -815,7 +815,7 @@ asmlinkage long compat_sys_mount(const char __user * dev_name,
out3:
kfree(kernel_dev);
out2:
- putname(dir_page);
+ putname(dir);
out1:
kfree(kernel_type);
out:
@@ -870,22 +870,20 @@ asmlinkage long compat_sys_old_readdir(unsigned int fd,
struct compat_old_linux_dirent __user *dirent, unsigned int count)
{
int error;
- struct file *file;
- int fput_needed;
+ struct fd f = fdget(fd);
struct compat_readdir_callback buf;
- file = fget_light(fd, &fput_needed);
- if (!file)
+ if (!f.file)
return -EBADF;
buf.result = 0;
buf.dirent = dirent;
- error = vfs_readdir(file, compat_fillonedir, &buf);
+ error = vfs_readdir(f.file, compat_fillonedir, &buf);
if (buf.result)
error = buf.result;
- fput_light(file, fput_needed);
+ fdput(f);
return error;
}
@@ -949,17 +947,16 @@ efault:
asmlinkage long compat_sys_getdents(unsigned int fd,
struct compat_linux_dirent __user *dirent, unsigned int count)
{
- struct file * file;
+ struct fd f;
struct compat_linux_dirent __user * lastdirent;
struct compat_getdents_callback buf;
- int fput_needed;
int error;
if (!access_ok(VERIFY_WRITE, dirent, count))
return -EFAULT;
- file = fget_light(fd, &fput_needed);
- if (!file)
+ f = fdget(fd);
+ if (!f.file)
return -EBADF;
buf.current_dir = dirent;
@@ -967,17 +964,17 @@ asmlinkage long compat_sys_getdents(unsigned int fd,
buf.count = count;
buf.error = 0;
- error = vfs_readdir(file, compat_filldir, &buf);
+ error = vfs_readdir(f.file, compat_filldir, &buf);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
- if (put_user(file->f_pos, &lastdirent->d_off))
+ if (put_user(f.file->f_pos, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
- fput_light(file, fput_needed);
+ fdput(f);
return error;
}
@@ -1035,17 +1032,16 @@ efault:
asmlinkage long compat_sys_getdents64(unsigned int fd,
struct linux_dirent64 __user * dirent, unsigned int count)
{
- struct file * file;
+ struct fd f;
struct linux_dirent64 __user * lastdirent;
struct compat_getdents_callback64 buf;
- int fput_needed;
int error;
if (!access_ok(VERIFY_WRITE, dirent, count))
return -EFAULT;
- file = fget_light(fd, &fput_needed);
- if (!file)
+ f = fdget(fd);
+ if (!f.file)
return -EBADF;
buf.current_dir = dirent;
@@ -1053,18 +1049,18 @@ asmlinkage long compat_sys_getdents64(unsigned int fd,
buf.count = count;
buf.error = 0;
- error = vfs_readdir(file, compat_filldir64, &buf);
+ error = vfs_readdir(f.file, compat_filldir64, &buf);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
- typeof(lastdirent->d_off) d_off = file->f_pos;
+ typeof(lastdirent->d_off) d_off = f.file->f_pos;
if (__put_user_unaligned(d_off, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
- fput_light(file, fput_needed);
+ fdput(f);
return error;
}
#endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
@@ -1152,15 +1148,16 @@ asmlinkage ssize_t
compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
unsigned long vlen)
{
- struct file *file;
- int fput_needed;
+ struct fd f = fdget(fd);
ssize_t ret;
+ loff_t pos;
- file = fget_light(fd, &fput_needed);
- if (!file)
+ if (!f.file)
return -EBADF;
- ret = compat_readv(file, vec, vlen, &file->f_pos);
- fput_light(file, fput_needed);
+ pos = f.file->f_pos;
+ ret = compat_readv(f.file, vec, vlen, &pos);
+ f.file->f_pos = pos;
+ fdput(f);
return ret;
}
@@ -1168,19 +1165,18 @@ asmlinkage ssize_t
compat_sys_preadv64(unsigned long fd, const struct compat_iovec __user *vec,
unsigned long vlen, loff_t pos)
{
- struct file *file;
- int fput_needed;
+ struct fd f;
ssize_t ret;
if (pos < 0)
return -EINVAL;
- file = fget_light(fd, &fput_needed);
- if (!file)
+ f = fdget(fd);
+ if (!f.file)
return -EBADF;
ret = -ESPIPE;
- if (file->f_mode & FMODE_PREAD)
- ret = compat_readv(file, vec, vlen, &pos);
- fput_light(file, fput_needed);
+ if (f.file->f_mode & FMODE_PREAD)
+ ret = compat_readv(f.file, vec, vlen, &pos);
+ fdput(f);
return ret;
}
@@ -1218,15 +1214,16 @@ asmlinkage ssize_t
compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
unsigned long vlen)
{
- struct file *file;
- int fput_needed;
+ struct fd f = fdget(fd);
ssize_t ret;
+ loff_t pos;
- file = fget_light(fd, &fput_needed);
- if (!file)
+ if (!f.file)
return -EBADF;
- ret = compat_writev(file, vec, vlen, &file->f_pos);
- fput_light(file, fput_needed);
+ pos = f.file->f_pos;
+ ret = compat_writev(f.file, vec, vlen, &pos);
+ f.file->f_pos = pos;
+ fdput(f);
return ret;
}
@@ -1234,19 +1231,18 @@ asmlinkage ssize_t
compat_sys_pwritev64(unsigned long fd, const struct compat_iovec __user *vec,
unsigned long vlen, loff_t pos)
{
- struct file *file;
- int fput_needed;
+ struct fd f;
ssize_t ret;
if (pos < 0)
return -EINVAL;
- file = fget_light(fd, &fput_needed);
- if (!file)
+ f = fdget(fd);
+ if (!f.file)
return -EBADF;
ret = -ESPIPE;
- if (file->f_mode & FMODE_PWRITE)
- ret = compat_writev(file, vec, vlen, &pos);
- fput_light(file, fput_needed);
+ if (f.file->f_mode & FMODE_PWRITE)
+ ret = compat_writev(f.file, vec, vlen, &pos);
+ fdput(f);
return ret;
}
@@ -1796,3 +1792,25 @@ compat_sys_open_by_handle_at(int mountdirfd,
return do_handle_open(mountdirfd, handle, flags);
}
#endif
+
+#ifdef __ARCH_WANT_COMPAT_SYS_SENDFILE
+asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
+ compat_off_t __user *offset, compat_size_t count)
+{
+ loff_t pos;
+ off_t off;
+ ssize_t ret;
+
+ if (offset) {
+ if (unlikely(get_user(off, offset)))
+ return -EFAULT;
+ pos = off;
+ ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
+ if (unlikely(put_user(pos, offset)))
+ return -EFAULT;
+ return ret;
+ }
+
+ return do_sendfile(out_fd, in_fd, NULL, count, 0);
+}
+#endif /* __ARCH_WANT_COMPAT_SYS_SENDFILE */