Hi Pekka,
On Tue, 17 Feb 2009 13:26:13 +0200, Pekka Enberg wrote:
> Hi Ryusuke,
>
> On Tue, 2009-02-17 at 16:42 +0900, Ryusuke Konishi wrote:
> > Pekka Enberg suggested converting ->ioctl operations to use
> > ->unlocked_ioctl to avoid BKL.
> >
> > The conversion was verified to be safe, so I will take it on this
> > occasion.
> >
> > Cc: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
> > Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
> > ---
> > fs/nilfs2/dir.c | 2 +-
> > fs/nilfs2/file.c | 2 +-
> > fs/nilfs2/ioctl.c | 4 ++--
> > fs/nilfs2/nilfs.h | 2 +-
> > 4 files changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
> > index 393316c..54100ac 100644
> > --- a/fs/nilfs2/dir.c
> > +++ b/fs/nilfs2/dir.c
> > @@ -702,7 +702,7 @@ struct file_operations nilfs_dir_operations = {
> > .llseek = generic_file_llseek,
> > .read = generic_read_dir,
> > .readdir = nilfs_readdir,
> > - .ioctl = nilfs_ioctl,
> > + .unlocked_ioctl = nilfs_ioctl,
> > #ifdef CONFIG_COMPAT
> > .compat_ioctl = nilfs_ioctl,
> > #endif /* CONFIG_COMPAT */
> > diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
> > index 1670038..df74577 100644
> > --- a/fs/nilfs2/file.c
> > +++ b/fs/nilfs2/file.c
> > @@ -138,7 +138,7 @@ struct file_operations nilfs_file_operations = {
> > .write = do_sync_write,
> > .aio_read = generic_file_aio_read,
> > .aio_write = generic_file_aio_write,
> > - .ioctl = nilfs_ioctl,
> > + .unlocked_ioctl = nilfs_ioctl,
> > #ifdef CONFIG_COMPAT
> > .compat_ioctl = nilfs_ioctl,
> > #endif /* CONFIG_COMPAT */
> > diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
> > index 33aff88..cfb2789 100644
> > --- a/fs/nilfs2/ioctl.c
> > +++ b/fs/nilfs2/ioctl.c
> > @@ -600,9 +600,9 @@ static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
> > return 0;
> > }
> >
> > -int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
> > - unsigned long arg)
> > +long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> > {
> > + struct inode *inode = filp->f_dentry->d_inode;
> > void __user *argp = (void * __user *)arg;
> >
> > switch (cmd) {
> > diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
> > index ad17fa9..f865ecb 100644
> > --- a/fs/nilfs2/nilfs.h
> > +++ b/fs/nilfs2/nilfs.h
> > @@ -242,7 +242,7 @@ extern void nilfs_set_link(struct inode *, struct nilfs_dir_entry *,
> > extern int nilfs_sync_file(struct file *, struct dentry *, int);
> >
> > /* ioctl.c */
> > -int nilfs_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
> > +long nilfs_ioctl(struct file *, unsigned int, unsigned long);
> > int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *, void __user *);
> >
> > /* inode.c */
>
> Maybe I'm looking at an old version of nilfs but don't you need to
> remove nilfs_compat_locked_ioctl() and the lock_kernel()/unlock_kernel()
> from nilfs_ioctl_timedwait() as well?
>
> Pekka
That's right, but the nilfs_ioctl_timedwait() itself was removed by
the first patch of this patch set. And, the compat ioctl was removed
in the third patch. So they don't appear in this patch.
Cheers,
Ryusuke
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