* namei.c - NTFS kernel directory inode operations. Part of the Linux-NTFS
* project.
*
- * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2001-2006 Anton Altaparmakov
*
* This program/include file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
*/
#include <linux/dcache.h>
+#include <linux/exportfs.h>
#include <linux/security.h>
#include "attrib.h"
* name. We then convert the name to the current NLS code page, and proceed
* searching for a dentry with this name, etc, as in case 2), above.
*
- * Locking: Caller must hold i_sem on the directory.
+ * Locking: Caller must hold i_mutex on the directory.
*/
static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent,
struct nameidata *nd)
uname_len = ntfs_nlstoucs(vol, dent->d_name.name, dent->d_name.len,
&uname);
if (uname_len < 0) {
- ntfs_error(vol->sb, "Failed to convert name to Unicode.");
+ if (uname_len != -ENAMETOOLONG)
+ ntfs_error(vol->sb, "Failed to convert name to "
+ "Unicode.");
return ERR_PTR(uname_len);
}
mref = ntfs_lookup_inode_by_name(NTFS_I(dir_ino), uname, uname_len,
/* Return the error code. */
return (struct dentry *)dent_inode;
}
- /* It is guaranteed that name is no longer allocated at this point. */
+ /* It is guaranteed that @name is no longer allocated at this point. */
if (MREF_ERR(mref) == -ENOENT) {
ntfs_debug("Entry was not found, adding negative dentry.");
/* The dcache will handle negative entries. */
ntfs_error(vol->sb, "ntfs_lookup_ino_by_name() failed with error "
"code %i.", -MREF_ERR(mref));
return ERR_PTR(MREF_ERR(mref));
-
// TODO: Consider moving this lot to a separate function! (AIA)
handle_name:
{
nls_name.hash = full_name_hash(nls_name.name, nls_name.len);
/*
- * Note: No need for dent->d_lock lock as i_sem is held on the
+ * Note: No need for dent->d_lock lock as i_mutex is held on the
* parent inode.
*/
/**
* Inode operations for directories.
*/
-struct inode_operations ntfs_dir_inode_ops = {
+const struct inode_operations ntfs_dir_inode_ops = {
.lookup = ntfs_lookup, /* VFS: Lookup directory. */
};
* The code is based on the ext3 ->get_parent() implementation found in
* fs/ext3/namei.c::ext3_get_parent().
*
- * Note: ntfs_get_parent() is called with @child_dent->d_inode->i_sem down.
+ * Note: ntfs_get_parent() is called with @child_dent->d_inode->i_mutex down.
*
* Return the dentry of the parent directory on success or the error code on
* error (IS_ERR() is true).
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
* allowing the inode number 0 which is used in NTFS for the system file $MFT
* and due to using iget() whereas NTFS needs ntfs_iget().
*/
-struct export_operations ntfs_export_ops = {
+const 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,
};
projects / linux-2.6-omap-h63xx.git / blobdiff