xfs: validate inode numbers in file handles correctly

[yangguoquan]

I have tried this patch, And problem resolved!
Thank you for your help!

 

> Date: Mon, 28 Nov 2011 06:19:47 -0500
> From: hch at infradead.org
> To: ygq51 at hotmail.com
> Subject: Re: xfs: validate inode numbers in file handles correctly
> CC: linux-xfs at oss.sgi.com; pengxihan at gmail.com
> 
> Guoquan and hank,
> 
> are you using 32-bit or 64-bit kernels? I just noticed we have a
> problem with exporting 64-bit inodes on 32-bit kernel because the
> VFS i_ino field is just 32-bits long. The patch below would fix
> that issue.
> 
> --- xfs.orig/fs/xfs/linux-2.6/xfs_export.c 2011-11-28 12:11:08.923630697 +0100
> +++ xfs/fs/xfs/linux-2.6/xfs_export.c 2011-11-28 12:13:21.766244360 +0100
> @@ -61,6 +61,8 @@ xfs_fs_encode_fh(
> struct fid *fid = (struct fid *)fh;
> struct xfs_fid64 *fid64 = (struct xfs_fid64 *)fh;
> struct inode *inode = dentry->d_inode;
> + struct inode *parent;
> + struct xfs_inode *ip = XFS_I(inode);
> int fileid_type;
> int len;
> 
> @@ -98,22 +100,24 @@ xfs_fs_encode_fh(
> switch (fileid_type) {
> case FILEID_INO32_GEN_PARENT:
> spin_lock(&dentry->d_lock);
> - fid->i32.parent_ino = dentry->d_parent->d_inode->i_ino;
> - fid->i32.parent_gen = dentry->d_parent->d_inode->i_generation;
> + parent = dentry->d_parent->d_inode;
> + fid->i32.parent_ino = XFS_I(parent)->i_ino;
> + fid->i32.parent_gen = parent->i_generation;
> spin_unlock(&dentry->d_lock);
> /*FALLTHRU*/
> case FILEID_INO32_GEN:
> - fid->i32.ino = inode->i_ino;
> + fid->i32.ino = ip->i_ino;
> fid->i32.gen = inode->i_generation;
> break;
> case FILEID_INO32_GEN_PARENT | XFS_FILEID_TYPE_64FLAG:
> spin_lock(&dentry->d_lock);
> - fid64->parent_ino = dentry->d_parent->d_inode->i_ino;
> - fid64->parent_gen = dentry->d_parent->d_inode->i_generation;
> + parent = dentry->d_parent->d_inode;
> + fid64->parent_ino = XFS_I(parent)->i_ino;
> + fid64->parent_gen = parent->i_generation;
> spin_unlock(&dentry->d_lock);
> /*FALLTHRU*/
> case FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG:
> - fid64->ino = inode->i_ino;
> + fid64->ino = ip->i_ino;
> fid64->gen = inode->i_generation;
> break;
> }
> 
> _______________________________________________
> xfs mailing list
> xfs at oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs
 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://oss.sgi.com/pipermail/xfs/attachments/20111203/f7d0c0d2/attachment.htm>