diff options
| -rw-r--r-- | fs/ntfs/namei.c | 75 |
1 files changed, 28 insertions, 47 deletions
diff --git a/fs/ntfs/namei.c b/fs/ntfs/namei.c index e93c6142b23c..887c5e131093 100644 --- a/fs/ntfs/namei.c +++ b/fs/ntfs/namei.c @@ -450,58 +450,40 @@ try_next: return parent_dent; } -/** - * ntfs_get_dentry - find a dentry for the inode from a file handle sub-fragment - * @sb: super block identifying the mounted ntfs volume - * @fh: the file handle sub-fragment - * - * Find a dentry for the inode given a file handle sub-fragment. This function - * is called from fs/exportfs/expfs.c::find_exported_dentry() which in turn is - * called from the default ->decode_fh() which is export_decode_fh() in the - * same file. The code is closely based on the default ->get_dentry() helper - * fs/exportfs/expfs.c::get_object(). - * - * The @fh contains two 32-bit unsigned values, the first one is the inode - * number and the second one is the inode generation. - * - * Return the dentry on success or the error code on error (IS_ERR() is true). - */ -static struct dentry *ntfs_get_dentry(struct super_block *sb, void *fh) +static struct inode *ntfs_nfs_get_inode(struct super_block *sb, + u64 ino, u32 generation) { - struct inode *vi; - struct dentry *dent; - unsigned long ino = ((u32 *)fh)[0]; - u32 gen = ((u32 *)fh)[1]; + struct inode *inode; - ntfs_debug("Entering for inode 0x%lx, generation 0x%x.", ino, gen); - vi = ntfs_iget(sb, ino); - if (IS_ERR(vi)) { - ntfs_error(sb, "Failed to get inode 0x%lx.", ino); - return (struct dentry *)vi; - } - if (unlikely(is_bad_inode(vi) || vi->i_generation != gen)) { - /* We didn't find the right inode. */ - ntfs_error(sb, "Inode 0x%lx, bad count: %d %d or version 0x%x " - "0x%x.", vi->i_ino, vi->i_nlink, - atomic_read(&vi->i_count), vi->i_generation, - gen); - iput(vi); - return ERR_PTR(-ESTALE); - } - /* Now find a dentry. If possible, get a well-connected one. */ - dent = d_alloc_anon(vi); - if (unlikely(!dent)) { - iput(vi); - return ERR_PTR(-ENOMEM); + inode = ntfs_iget(sb, ino); + if (!IS_ERR(inode)) { + if (is_bad_inode(inode) || inode->i_generation != generation) { + iput(inode); + inode = ERR_PTR(-ESTALE); + } } - ntfs_debug("Done for inode 0x%lx, generation 0x%x.", ino, gen); - return dent; + + return inode; +} + +static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_dentry(sb, fid, fh_len, fh_type, + ntfs_nfs_get_inode); +} + +static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_parent(sb, fid, fh_len, fh_type, + ntfs_nfs_get_inode); } /** * Export operations allowing NFS exporting of mounted NTFS partitions. * - * We use the default ->decode_fh() and ->encode_fh() for now. Note that they + * We use the default ->encode_fh() for now. Note that they * use 32 bits to store the inode number which is an unsigned long so on 64-bit * architectures is usually 64 bits so it would all fail horribly on huge * volumes. I guess we need to define our own encode and decode fh functions @@ -520,7 +502,6 @@ static struct dentry *ntfs_get_dentry(struct super_block *sb, void *fh) struct export_operations ntfs_export_ops = { .get_parent = ntfs_get_parent, /* Find the parent of a given directory. */ - .get_dentry = ntfs_get_dentry, /* Find a dentry for the inode - given a file handle - sub-fragment. */ + .fh_to_dentry = ntfs_fh_to_dentry, + .fh_to_parent = ntfs_fh_to_parent, }; |