linux/fs/smb/client/reparse.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2024 Paulo Alcantara <[email protected]>
 */

#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include "cifsglob.h"
#include "smb2proto.h"
#include "cifsproto.h"
#include "cifs_unicode.h"
#include "cifs_debug.h"
#include "fs_context.h"
#include "reparse.h"

static int detect_directory_symlink_target(struct cifs_sb_info *cifs_sb,
					   const unsigned int xid,
					   const char *full_path,
					   const char *symname,
					   bool *directory);

int smb2_create_reparse_symlink(const unsigned int xid, struct inode *inode,
				struct dentry *dentry, struct cifs_tcon *tcon,
				const char *full_path, const char *symname)
{ … }

static int detect_directory_symlink_target(struct cifs_sb_info *cifs_sb,
					   const unsigned int xid,
					   const char *full_path,
					   const char *symname,
					   bool *directory)
{ … }

static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
			       mode_t mode, dev_t dev,
			       struct kvec *iov)
{ … }

static int mknod_nfs(unsigned int xid, struct inode *inode,
		     struct dentry *dentry, struct cifs_tcon *tcon,
		     const char *full_path, umode_t mode, dev_t dev)
{ … }

static int wsl_set_reparse_buf(struct reparse_data_buffer *buf,
			       mode_t mode, struct kvec *iov)
{ … }

static struct smb2_create_ea_ctx *ea_create_context(u32 dlen, size_t *cc_len)
{ … }

struct wsl_xattr { … };

static int wsl_set_xattrs(struct inode *inode, umode_t _mode,
			  dev_t _dev, struct kvec *iov)
{ … }

static int mknod_wsl(unsigned int xid, struct inode *inode,
		     struct dentry *dentry, struct cifs_tcon *tcon,
		     const char *full_path, umode_t mode, dev_t dev)
{ … }

int smb2_mknod_reparse(unsigned int xid, struct inode *inode,
		       struct dentry *dentry, struct cifs_tcon *tcon,
		       const char *full_path, umode_t mode, dev_t dev)
{ … }

/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
static int parse_reparse_posix(struct reparse_posix_data *buf,
			       struct cifs_sb_info *cifs_sb,
			       struct cifs_open_info_data *data)
{ … }

static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
				 u32 plen, bool unicode,
				 struct cifs_sb_info *cifs_sb,
				 struct cifs_open_info_data *data)
{ … }

int parse_reparse_point(struct reparse_data_buffer *buf,
			u32 plen, struct cifs_sb_info *cifs_sb,
			bool unicode, struct cifs_open_info_data *data)
{ … }

int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
			     struct kvec *rsp_iov,
			     struct cifs_open_info_data *data)
{ … }

static void wsl_to_fattr(struct cifs_open_info_data *data,
			 struct cifs_sb_info *cifs_sb,
			 u32 tag, struct cifs_fattr *fattr)
{ … }

bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
				 struct cifs_fattr *fattr,
				 struct cifs_open_info_data *data)
{ … }