linux/fs/udf/namei.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * namei.c
 *
 * PURPOSE
 *      Inode name handling routines for the OSTA-UDF(tm) filesystem.
 *
 * COPYRIGHT
 *  (C) 1998-2004 Ben Fennema
 *  (C) 1999-2000 Stelias Computing Inc
 *
 * HISTORY
 *
 *  12/12/98 blf  Created. Split out the lookup code from dir.c
 *  04/19/99 blf  link, mknod, symlink support
 */

#include "udfdecl.h"

#include "udf_i.h"
#include "udf_sb.h"
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/crc-itu-t.h>
#include <linux/exportfs.h>
#include <linux/iversion.h>

static inline int udf_match(int len1, const unsigned char *name1, int len2,
			    const unsigned char *name2)
{ … }

/**
 * udf_fiiter_find_entry - find entry in given directory.
 *
 * @dir:	directory inode to search in
 * @child:	qstr of the name
 * @iter:	iter to use for searching
 *
 * This function searches in the directory @dir for a file name @child. When
 * found, @iter points to the position in the directory with given entry.
 *
 * Returns 0 on success, < 0 on error (including -ENOENT).
 */
static int udf_fiiter_find_entry(struct inode *dir, const struct qstr *child,
				 struct udf_fileident_iter *iter)
{ … }

static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
				 unsigned int flags)
{ … }

static int udf_expand_dir_adinicb(struct inode *inode, udf_pblk_t *block)
{ … }

static int udf_fiiter_add_entry(struct inode *dir, struct dentry *dentry,
				struct udf_fileident_iter *iter)
{ … }

static void udf_fiiter_delete_entry(struct udf_fileident_iter *iter)
{ … }

static void udf_add_fid_counter(struct super_block *sb, bool dir, int val)
{ … }

static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
{ … }

static int udf_create(struct mnt_idmap *idmap, struct inode *dir,
		      struct dentry *dentry, umode_t mode, bool excl)
{ … }

static int udf_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
		       struct file *file, umode_t mode)
{ … }

static int udf_mknod(struct mnt_idmap *idmap, struct inode *dir,
		     struct dentry *dentry, umode_t mode, dev_t rdev)
{ … }

static int udf_mkdir(struct mnt_idmap *idmap, struct inode *dir,
		     struct dentry *dentry, umode_t mode)
{ … }

static int empty_dir(struct inode *dir)
{ … }

static int udf_rmdir(struct inode *dir, struct dentry *dentry)
{ … }

static int udf_unlink(struct inode *dir, struct dentry *dentry)
{ … }

static int udf_symlink(struct mnt_idmap *idmap, struct inode *dir,
		       struct dentry *dentry, const char *symname)
{ … }

static int udf_link(struct dentry *old_dentry, struct inode *dir,
		    struct dentry *dentry)
{ … }

/* Anybody can rename anything with this: the permission checks are left to the
 * higher-level routines.
 */
static int udf_rename(struct mnt_idmap *idmap, struct inode *old_dir,
		      struct dentry *old_dentry, struct inode *new_dir,
		      struct dentry *new_dentry, unsigned int flags)
{ … }

static struct dentry *udf_get_parent(struct dentry *child)
{ … }


static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
					u16 partref, __u32 generation)
{ … }

static struct dentry *udf_fh_to_dentry(struct super_block *sb,
				       struct fid *fid, int fh_len, int fh_type)
{ … }

static struct dentry *udf_fh_to_parent(struct super_block *sb,
				       struct fid *fid, int fh_len, int fh_type)
{ … }
static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
			 struct inode *parent)
{ … }

const struct export_operations udf_export_ops = …;

const struct inode_operations udf_dir_inode_operations = …;