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Re: [PATCH] sanitize xfs_initialize_vnode

To: xfs@xxxxxxxxxxx
Subject: Re: [PATCH] sanitize xfs_initialize_vnode
From: Christoph Hellwig <hch@xxxxxx>
Date: Fri, 27 Jun 2008 15:05:46 +0200
In-reply-to: <20080520063622.GA8869@xxxxxx>
References: <20080502105215.GA17870@xxxxxx> <20080520063622.GA8869@xxxxxx>
Sender: xfs-bounce@xxxxxxxxxxx
User-agent: Mutt/1.3.28i
ping^2

On Tue, May 20, 2008 at 08:36:22AM +0200, Christoph Hellwig wrote:
> ping?
> 
> On Fri, May 02, 2008 at 12:52:15PM +0200, Christoph Hellwig wrote:
> > Sanitize setting up the Linux indode.
> > 
> > Setting up the xfs_inode <-> inode link is opencoded in xfs_iget_core
> > now because that's the only place it needs to be done,
> > xfs_initialize_vnode is renamed to xfs_setup_inode and loses all
> > superflous paramaters.  The check for I_NEW is removed because it always
> > is true and the di_mode check moves into xfs_iget_core because it's only
> > needed there.
> > 
> > xfs_set_inodeops and xfs_revalidate_inode are merged into
> > xfs_setup_inode and the whole things is moved into xfs_iops.c where it
> > belongs.
> > 
> > 
> > Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> > 
> > Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_iops.c
> > ===================================================================
> > --- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_iops.c  2008-05-02 
> > 08:41:27.000000000 +0200
> > +++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_iops.c       2008-05-02 
> > 08:51:46.000000000 +0200
> > @@ -777,7 +777,7 @@ out_error:
> >     return error;
> >  }
> >  
> > -const struct inode_operations xfs_inode_operations = {
> > +static const struct inode_operations xfs_inode_operations = {
> >     .permission             = xfs_vn_permission,
> >     .truncate               = xfs_vn_truncate,
> >     .getattr                = xfs_vn_getattr,
> > @@ -789,7 +789,7 @@ const struct inode_operations xfs_inode_
> >     .fallocate              = xfs_vn_fallocate,
> >  };
> >  
> > -const struct inode_operations xfs_dir_inode_operations = {
> > +static const struct inode_operations xfs_dir_inode_operations = {
> >     .create                 = xfs_vn_create,
> >     .lookup                 = xfs_vn_lookup,
> >     .link                   = xfs_vn_link,
> > @@ -808,7 +808,7 @@ const struct inode_operations xfs_dir_in
> >     .listxattr              = xfs_vn_listxattr,
> >  };
> >  
> > -const struct inode_operations xfs_symlink_inode_operations = {
> > +static const struct inode_operations xfs_symlink_inode_operations = {
> >     .readlink               = generic_readlink,
> >     .follow_link            = xfs_vn_follow_link,
> >     .put_link               = xfs_vn_put_link,
> > @@ -820,3 +820,95 @@ const struct inode_operations xfs_symlin
> >     .removexattr            = generic_removexattr,
> >     .listxattr              = xfs_vn_listxattr,
> >  };
> > +
> > +STATIC void
> > +xfs_diflags_to_iflags(
> > +   struct inode            *inode,
> > +   struct xfs_inode        *ip)
> > +{
> > +   if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
> > +           inode->i_flags |= S_IMMUTABLE;
> > +   else
> > +           inode->i_flags &= ~S_IMMUTABLE;
> > +   if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
> > +           inode->i_flags |= S_APPEND;
> > +   else
> > +           inode->i_flags &= ~S_APPEND;
> > +   if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
> > +           inode->i_flags |= S_SYNC;
> > +   else
> > +           inode->i_flags &= ~S_SYNC;
> > +   if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
> > +           inode->i_flags |= S_NOATIME;
> > +   else
> > +           inode->i_flags &= ~S_NOATIME;
> > +}
> > +
> > +/*
> > + * Initialize the Linux inode, set up the operation vectors and
> > + * unlock the inode.
> > + *
> > + * When reading existing inodes from disk this is called directly
> > + * from xfs_iget, when creating a new inode it is called from
> > + * xfs_ialloc after setting up the inode.
> > + */
> > +void
> > +xfs_setup_inode(
> > +   struct xfs_inode        *ip)
> > +{
> > +   struct inode            *inode = ip->i_vnode;
> > +
> > +   inode->i_mode   = ip->i_d.di_mode;
> > +   inode->i_nlink  = ip->i_d.di_nlink;
> > +   inode->i_uid    = ip->i_d.di_uid;
> > +   inode->i_gid    = ip->i_d.di_gid;
> > +
> > +   switch (inode->i_mode & S_IFMT) {
> > +   case S_IFBLK:
> > +   case S_IFCHR:
> > +           inode->i_rdev =
> > +                   MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
> > +                         sysv_minor(ip->i_df.if_u2.if_rdev));
> > +           break;
> > +   default:
> > +           inode->i_rdev = 0;
> > +           break;
> > +   }
> > +
> > +   inode->i_generation = ip->i_d.di_gen;
> > +   i_size_write(inode, ip->i_d.di_size);
> > +   inode->i_atime.tv_sec   = ip->i_d.di_atime.t_sec;
> > +   inode->i_atime.tv_nsec  = ip->i_d.di_atime.t_nsec;
> > +   inode->i_mtime.tv_sec   = ip->i_d.di_mtime.t_sec;
> > +   inode->i_mtime.tv_nsec  = ip->i_d.di_mtime.t_nsec;
> > +   inode->i_ctime.tv_sec   = ip->i_d.di_ctime.t_sec;
> > +   inode->i_ctime.tv_nsec  = ip->i_d.di_ctime.t_nsec;
> > +   xfs_diflags_to_iflags(inode, ip);
> > +   xfs_iflags_clear(ip, XFS_IMODIFIED);
> > +
> > +   switch (inode->i_mode & S_IFMT) {
> > +   case S_IFREG:
> > +           inode->i_op = &xfs_inode_operations;
> > +           inode->i_fop = &xfs_file_operations;
> > +           inode->i_mapping->a_ops = &xfs_address_space_operations;
> > +           break;
> > +   case S_IFDIR:
> > +           inode->i_op = &xfs_dir_inode_operations;
> > +           inode->i_fop = &xfs_dir_file_operations;
> > +           break;
> > +   case S_IFLNK:
> > +           inode->i_op = &xfs_symlink_inode_operations;
> > +           if (!(ip->i_df.if_flags & XFS_IFINLINE))
> > +                   inode->i_mapping->a_ops = &xfs_address_space_operations;
> > +           break;
> > +   default:
> > +           inode->i_op = &xfs_inode_operations;
> > +           init_special_inode(inode, inode->i_mode, inode->i_rdev);
> > +           break;
> > +   }
> > +
> > +   xfs_iflags_clear(ip, XFS_INEW);
> > +   barrier();
> > +
> > +   unlock_new_inode(inode);
> > +}
> > Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_iops.h
> > ===================================================================
> > --- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_iops.h  2008-05-02 
> > 08:41:27.000000000 +0200
> > +++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_iops.h       2008-05-02 
> > 08:41:35.000000000 +0200
> > @@ -18,9 +18,7 @@
> >  #ifndef __XFS_IOPS_H__
> >  #define __XFS_IOPS_H__
> >  
> > -extern const struct inode_operations xfs_inode_operations;
> > -extern const struct inode_operations xfs_dir_inode_operations;
> > -extern const struct inode_operations xfs_symlink_inode_operations;
> > +struct xfs_inode;
> >  
> >  extern const struct file_operations xfs_file_operations;
> >  extern const struct file_operations xfs_dir_file_operations;
> > @@ -28,10 +26,11 @@ extern const struct file_operations xfs_
> >  
> >  extern ssize_t xfs_vn_listxattr(struct dentry *, char *data, size_t size);
> >  
> > -struct xfs_inode;
> >  extern void xfs_ichgtime(struct xfs_inode *, int);
> >  extern void xfs_ichgtime_fast(struct xfs_inode *, struct inode *, int);
> >  
> > +extern void xfs_setup_inode(struct xfs_inode *);
> > +
> >  #define xfs_vtoi(vp) \
> >     ((struct xfs_inode *)vn_to_inode(vp)->i_private)
> >  
> > Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_ksyms.c
> > ===================================================================
> > --- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_ksyms.c 2008-05-02 
> > 08:41:27.000000000 +0200
> > +++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_ksyms.c      2008-05-02 
> > 08:41:35.000000000 +0200
> > @@ -155,12 +155,9 @@ EXPORT_SYMBOL(kmem_zone_free);
> >  EXPORT_SYMBOL(kmem_zone_init);
> >  EXPORT_SYMBOL(kmem_zone_zalloc);
> >  EXPORT_SYMBOL(xfs_address_space_operations);
> > -EXPORT_SYMBOL(xfs_dir_inode_operations);
> >  EXPORT_SYMBOL(xfs_dir_file_operations);
> > -EXPORT_SYMBOL(xfs_inode_operations);
> >  EXPORT_SYMBOL(xfs_file_operations);
> >  EXPORT_SYMBOL(xfs_invis_file_operations);
> > -EXPORT_SYMBOL(xfs_symlink_inode_operations);
> >  EXPORT_SYMBOL(xfs_buf_delwri_dequeue);
> >  EXPORT_SYMBOL(_xfs_buf_find);
> >  EXPORT_SYMBOL(xfs_buf_iostart);
> > Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_super.c
> > ===================================================================
> > --- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_super.c 2008-05-02 
> > 08:41:34.000000000 +0200
> > +++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_super.c      2008-05-02 
> > 08:51:43.000000000 +0200
> > @@ -558,115 +558,6 @@ xfs_max_file_offset(
> >     return (((__uint64_t)pagefactor) << bitshift) - 1;
> >  }
> >  
> > -STATIC_INLINE void
> > -xfs_set_inodeops(
> > -   struct inode            *inode)
> > -{
> > -   switch (inode->i_mode & S_IFMT) {
> > -   case S_IFREG:
> > -           inode->i_op = &xfs_inode_operations;
> > -           inode->i_fop = &xfs_file_operations;
> > -           inode->i_mapping->a_ops = &xfs_address_space_operations;
> > -           break;
> > -   case S_IFDIR:
> > -           inode->i_op = &xfs_dir_inode_operations;
> > -           inode->i_fop = &xfs_dir_file_operations;
> > -           break;
> > -   case S_IFLNK:
> > -           inode->i_op = &xfs_symlink_inode_operations;
> > -           if (!(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE))
> > -                   inode->i_mapping->a_ops = &xfs_address_space_operations;
> > -           break;
> > -   default:
> > -           inode->i_op = &xfs_inode_operations;
> > -           init_special_inode(inode, inode->i_mode, inode->i_rdev);
> > -           break;
> > -   }
> > -}
> > -
> > -STATIC_INLINE void
> > -xfs_revalidate_inode(
> > -   xfs_mount_t             *mp,
> > -   bhv_vnode_t             *vp,
> > -   xfs_inode_t             *ip)
> > -{
> > -   struct inode            *inode = vn_to_inode(vp);
> > -
> > -   inode->i_mode   = ip->i_d.di_mode;
> > -   inode->i_nlink  = ip->i_d.di_nlink;
> > -   inode->i_uid    = ip->i_d.di_uid;
> > -   inode->i_gid    = ip->i_d.di_gid;
> > -
> > -   switch (inode->i_mode & S_IFMT) {
> > -   case S_IFBLK:
> > -   case S_IFCHR:
> > -           inode->i_rdev =
> > -                   MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
> > -                         sysv_minor(ip->i_df.if_u2.if_rdev));
> > -           break;
> > -   default:
> > -           inode->i_rdev = 0;
> > -           break;
> > -   }
> > -
> > -   inode->i_generation = ip->i_d.di_gen;
> > -   i_size_write(inode, ip->i_d.di_size);
> > -   inode->i_atime.tv_sec   = ip->i_d.di_atime.t_sec;
> > -   inode->i_atime.tv_nsec  = ip->i_d.di_atime.t_nsec;
> > -   inode->i_mtime.tv_sec   = ip->i_d.di_mtime.t_sec;
> > -   inode->i_mtime.tv_nsec  = ip->i_d.di_mtime.t_nsec;
> > -   inode->i_ctime.tv_sec   = ip->i_d.di_ctime.t_sec;
> > -   inode->i_ctime.tv_nsec  = ip->i_d.di_ctime.t_nsec;
> > -   if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
> > -           inode->i_flags |= S_IMMUTABLE;
> > -   else
> > -           inode->i_flags &= ~S_IMMUTABLE;
> > -   if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
> > -           inode->i_flags |= S_APPEND;
> > -   else
> > -           inode->i_flags &= ~S_APPEND;
> > -   if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
> > -           inode->i_flags |= S_SYNC;
> > -   else
> > -           inode->i_flags &= ~S_SYNC;
> > -   if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
> > -           inode->i_flags |= S_NOATIME;
> > -   else
> > -           inode->i_flags &= ~S_NOATIME;
> > -   xfs_iflags_clear(ip, XFS_IMODIFIED);
> > -}
> > -
> > -void
> > -xfs_initialize_vnode(
> > -   struct xfs_mount        *mp,
> > -   bhv_vnode_t             *vp,
> > -   struct xfs_inode        *ip)
> > -{
> > -   struct inode            *inode = vn_to_inode(vp);
> > -
> > -   if (!ip->i_vnode) {
> > -           ip->i_vnode = vp;
> > -           inode->i_private = ip;
> > -   }
> > -
> > -   /*
> > -    * We need to set the ops vectors, and unlock the inode, but if
> > -    * we have been called during the new inode create process, it is
> > -    * too early to fill in the Linux inode.  We will get called a
> > -    * second time once the inode is properly set up, and then we can
> > -    * finish our work.
> > -    */
> > -   if (ip->i_d.di_mode != 0 && (inode->i_state & I_NEW)) {
> > -           xfs_revalidate_inode(mp, vp, ip);
> > -           xfs_set_inodeops(inode);
> > -
> > -           xfs_iflags_clear(ip, XFS_INEW);
> > -           barrier();
> > -
> > -           unlock_new_inode(inode);
> > -   }
> > -}
> > -
> >  int
> >  xfs_blkdev_get(
> >     xfs_mount_t             *mp,
> > Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_super.h
> > ===================================================================
> > --- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_super.h 2008-05-02 
> > 08:41:27.000000000 +0200
> > +++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_super.h      2008-05-02 
> > 08:41:35.000000000 +0200
> > @@ -72,9 +72,6 @@ struct block_device;
> >  
> >  extern __uint64_t xfs_max_file_offset(unsigned int);
> >  
> > -extern void xfs_initialize_vnode(struct xfs_mount *mp, bhv_vnode_t *vp,
> > -           struct xfs_inode *ip);
> > -
> >  extern void xfs_flush_inode(struct xfs_inode *);
> >  extern void xfs_flush_device(struct xfs_inode *);
> >  
> > Index: linux-2.6-xfs/fs/xfs/xfs_iget.c
> > ===================================================================
> > --- linux-2.6-xfs.orig/fs/xfs/xfs_iget.c    2008-05-02 08:41:27.000000000 
> > +0200
> > +++ linux-2.6-xfs/fs/xfs/xfs_iget.c 2008-05-02 08:53:18.000000000 +0200
> > @@ -288,10 +288,17 @@ finish_inode:
> >     *ipp = ip;
> >  
> >     /*
> > +    * Set up the Linux with the Linux inode.
> > +    */
> > +   ip->i_vnode = inode;
> > +   inode->i_private = ip;
> > +
> > +   /*
> >      * If we have a real type for an on-disk inode, we can set ops(&unlock)
> >      * now.  If it's a new inode being created, xfs_ialloc will handle it.
> >      */
> > -   xfs_initialize_vnode(mp, inode, ip);
> > +   if (ip->i_d.di_mode != 0)
> > +           xfs_setup_inode(ip);
> >     return 0;
> >  }
> >  
> > Index: linux-2.6-xfs/fs/xfs/xfs_inode.c
> > ===================================================================
> > --- linux-2.6-xfs.orig/fs/xfs/xfs_inode.c   2008-05-02 08:41:27.000000000 
> > +0200
> > +++ linux-2.6-xfs/fs/xfs/xfs_inode.c        2008-05-02 08:41:35.000000000 
> > +0200
> > @@ -1046,7 +1046,6 @@ xfs_ialloc(
> >  {
> >     xfs_ino_t       ino;
> >     xfs_inode_t     *ip;
> > -   bhv_vnode_t     *vp;
> >     uint            flags;
> >     int             error;
> >  
> > @@ -1077,7 +1076,6 @@ xfs_ialloc(
> >     }
> >     ASSERT(ip != NULL);
> >  
> > -   vp = XFS_ITOV(ip);
> >     ip->i_d.di_mode = (__uint16_t)mode;
> >     ip->i_d.di_onlink = 0;
> >     ip->i_d.di_nlink = nlink;
> > @@ -1220,7 +1218,7 @@ xfs_ialloc(
> >     xfs_trans_log_inode(tp, ip, flags);
> >  
> >     /* now that we have an i_mode we can setup inode ops and unlock */
> > -   xfs_initialize_vnode(tp->t_mountp, vp, ip);
> > +   xfs_setup_inode(ip);
> >  
> >     *ipp = ip;
> >     return 0;
> ---end quoted text---
---end quoted text---


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