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preadv/pwritev: switch compat readv/preadv/writev/pwritev from fget to fget_light 

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <linux-api@vger.kernel.org>
Cc: <linux-arch@vger.kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Gerd Hoffmann 2009-04-02 16:59:25 -07:00 committed by Linus Torvalds
parent ddd9e91b71
commit 10c7db2792
1 changed files with 12 additions and 8 deletions
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20
fs/compat.c
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@ -1222,13 +1222,14 @@ compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
unsigned long vlen)
{
struct file *file;
int fput_needed;
ssize_t ret;
file = fget(fd);
file = fget_light(fd, &fput_needed);
if (!file)
return -EBADF;
ret = compat_readv(file, vec, vlen, &file->f_pos);
fput(file);
fput_light(file, fput_needed);
return ret;
}
@ -1238,15 +1239,16 @@ compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
{
loff_t pos = ((loff_t)pos_high << 32) | pos_low;
struct file *file;
int fput_needed;
ssize_t ret;
if (pos < 0)
return -EINVAL;
file = fget(fd);
file = fget_light(fd, &fput_needed);
if (!file)
return -EBADF;
ret = compat_readv(file, vec, vlen, &pos);
fput(file);
fput_light(file, fput_needed);
return ret;
}
@ -1277,13 +1279,14 @@ compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
unsigned long vlen)
{
struct file *file;
int fput_needed;
ssize_t ret;
file = fget(fd);
file = fget_light(fd, &fput_needed);
if (!file)
return -EBADF;
ret = compat_writev(file, vec, vlen, &file->f_pos);
fput(file);
fput_light(file, fput_needed);
return ret;
}
@ -1293,15 +1296,16 @@ compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
{
loff_t pos = ((loff_t)pos_high << 32) | pos_low;
struct file *file;
int fput_needed;
ssize_t ret;
if (pos < 0)
return -EINVAL;
file = fget(fd);
file = fget_light(fd, &fput_needed);
if (!file)
return -EBADF;
ret = compat_writev(file, vec, vlen, &pos);
fput(file);
fput_light(file, fput_needed);
return ret;
}