path: root/fs/cifs/cifsproto.h

/*
 *   fs/cifs/cifsproto.h
 *
 *   Copyright (c) International Business Machines  Corp., 2002,2008
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#ifndef _CIFSPROTO_H
#define _CIFSPROTO_H
#include <linux/nls.h>
#include "trace.h"
#ifdef CONFIG_CIFS_DFS_UPCALL
#include "dfs_cache.h"
#endif

struct statfs;
struct smb_rqst;
struct smb3_fs_context;

/*
 *****************************************************************
 * All Prototypes
 *****************************************************************
 */

extern struct smb_hdr *cifs_buf_get(void);
extern void cifs_buf_release(void *);
extern struct smb_hdr *cifs_small_buf_get(void);
extern void cifs_small_buf_release(void *);
extern void free_rsp_buf(int, void *);
extern int smb_send(struct TCP_Server_Info *, struct smb_hdr *,
			unsigned int /* length */);
extern unsigned int _get_xid(void);
extern void _free_xid(unsigned int);
#define get_xid()							\
({									\
	unsigned int __xid = _get_xid();				\
	cifs_dbg(FYI, "VFS: in %s as Xid: %u with uid: %d\n",		\
		 __func__, __xid,					\
		 from_kuid(&init_user_ns, current_fsuid()));		\
	trace_smb3_enter(__xid, __func__);				\
	__xid;								\
})

#define free_xid(curr_xid)						\
do {									\
	_free_xid(curr_xid);						\
	cifs_dbg(FYI, "VFS: leaving %s (xid = %u) rc = %d\n",		\
		 __func__, curr_xid, (int)rc);				\
	if (rc)								\
		trace_smb3_exit_err(curr_xid, __func__, (int)rc);	\
	else								\
		trace_smb3_exit_done(curr_xid, __func__);		\
} while (0)
extern int init_cifs_idmap(void);
extern void exit_cifs_idmap(void);
extern int init_cifs_spnego(void);
extern void exit_cifs_spnego(void);
extern char *build_path_from_dentry(struct dentry *);
extern char *build_path_from_dentry_optional_prefix(struct dentry *direntry,
						    bool prefix);
extern char *cifs_build_path_to_root(struct smb3_fs_context *ctx,
				     struct cifs_sb_info *cifs_sb,
				     struct cifs_tcon *tcon,
				     int add_treename);
extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
extern char *cifs_compose_mount_options(const char *sb_mountdata,
		const char *fullpath, const struct dfs_info3_param *ref);
/* extern void renew_parental_timestamps(struct dentry *direntry);*/
extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer,
					struct TCP_Server_Info *server);
extern void DeleteMidQEntry(struct mid_q_entry *midEntry);
extern void cifs_delete_mid(struct mid_q_entry *mid);
extern void cifs_mid_q_entry_release(struct mid_q_entry *midEntry);
extern void cifs_wake_up_task(struct mid_q_entry *mid);
extern int cifs_handle_standard(struct TCP_Server_Info *server,
				struct mid_q_entry *mid);
extern int smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx);
extern bool cifs_match_ipaddr(struct sockaddr *srcaddr, struct sockaddr *rhs);
extern int cifs_discard_remaining_data(struct TCP_Server_Info *server);
extern int cifs_call_async(struct TCP_Server_Info *server,
			struct smb_rqst *rqst,
			mid_receive_t *receive, mid_callback_t *callback,
			mid_handle_t *handle, void *cbdata, const int flags,
			const struct cifs_credits *exist_credits);
extern struct TCP_Server_Info *cifs_pick_channel(struct cifs_ses *ses);
extern int cifs_send_recv(const unsigned int xid, struct cifs_ses *ses,
			  struct TCP_Server_Info *server,
			  struct smb_rqst *rqst, int *resp_buf_type,
			  const int flags, struct kvec *resp_iov);
extern int compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
			      struct TCP_Server_Info *server,
			      const int flags, const int num_rqst,
			      struct smb_rqst *rqst, int *resp_buf_type,
			      struct kvec *resp_iov);
extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *,
			struct smb_hdr * /* input */ ,
			struct smb_hdr * /* out */ ,
			int * /* bytes returned */ , const int);
extern int SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
			    char *in_buf, int flags);
extern struct mid_q_entry *cifs_setup_request(struct cifs_ses *,
				struct TCP_Server_Info *,
				struct smb_rqst *);
extern struct mid_q_entry *cifs_setup_async_request(struct TCP_Server_Info *,
						struct smb_rqst *);
extern int cifs_check_receive(struct mid_q_entry *mid,
			struct TCP_Server_Info *server, bool log_error);
extern int cifs_wait_mtu_credits(struct TCP_Server_Info *server,
				 unsigned int size, unsigned int *num,
				 struct cifs_credits *credits);
extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *,
			struct kvec *, int /* nvec to send */,
			int * /* type of buf returned */, const int flags,
			struct kvec * /* resp vec */);
extern int SendReceiveBlockingLock(const unsigned int xid,
			struct cifs_tcon *ptcon,
			struct smb_hdr *in_buf ,
			struct smb_hdr *out_buf,
			int *bytes_returned);
extern int cifs_reconnect(struct TCP_Server_Info *server);
extern int checkSMB(char *buf, unsigned int len, struct TCP_Server_Info *srvr);
extern bool is_valid_oplock_break(char *, struct TCP_Server_Info *);
extern bool backup_cred(struct cifs_sb_info *);
extern bool is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof);
extern void cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
			    unsigned int bytes_written);
extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, int);
extern int cifs_get_writable_file(struct cifsInodeInfo *cifs_inode,
				  int flags,
				  struct cifsFileInfo **ret_file);
extern int cifs_get_writable_path(struct cifs_tcon *tcon, const char *name,
				  int flags,
				  struct cifsFileInfo **ret_file);
extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool);
extern int cifs_get_readable_path(struct cifs_tcon *tcon, const char *name,
				  struct cifsFileInfo **ret_file);
extern unsigned int smbCalcSize(void *buf, struct TCP_Server_Info *server);
extern int </