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linux-stable/fs/cifs/cifsproto.h
Jeff Layton 1c89254926 cifs: convert cifs_iovec_read to use async reads 
Convert cifs_iovec_read to use async I/O. This also raises the limit on
the rsize for uncached reads. We first allocate a set of pages to hold
the replies, then issue the reads in parallel and then collect the
replies and copy the results into the iovec.

A possible future optimization would be to kmap and inline the iovec
buffers and read the data directly from the socket into that. That would
require some rather complex conversion of the iovec into a kvec however.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-05-16 20:13:31 -05:00

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/*
* 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>
struct statfs;
struct smb_vol;
/*
*****************************************************************
* 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 int smb_send(struct TCP_Server_Info *, struct smb_hdr *,
unsigned int /* length */);
extern unsigned int _GetXid(void);
extern void _FreeXid(unsigned int);
#define GetXid() \
({ \
int __xid = (int)_GetXid(); \
cFYI(1, "CIFS VFS: in %s as Xid: %d with uid: %d", \
__func__, __xid, current_fsuid()); \
__xid; \
})
#define FreeXid(curr_xid) \
do { \
_FreeXid(curr_xid); \
cFYI(1, "CIFS VFS: leaving %s (xid = %d) rc = %d", \
__func__, curr_xid, (int)rc); \
} while (0)
extern int init_cifs_idmap(void);
extern void exit_cifs_idmap(void);
extern void cifs_destroy_idmaptrees(void);
extern char *build_path_from_dentry(struct dentry *);
extern char *cifs_build_path_to_root(struct smb_vol *vol,
struct cifs_sb_info *cifs_sb,
struct cifs_tcon *tcon);
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,
char **devname);
/* 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 int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
unsigned int nvec, mid_receive_t *receive,
mid_callback_t *callback, void *cbdata,
bool ignore_pend);
extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *,
struct smb_hdr * /* input */ ,
struct smb_hdr * /* out */ ,
int * /* bytes returned */ , const int long_op);
extern int SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
char *in_buf, int flags);
extern int cifs_check_receive(struct mid_q_entry *mid,
struct TCP_Server_Info *server, bool log_error);
extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *,
struct kvec *, int /* nvec to send */,
int * /* type of buf returned */ , const int flags);
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 void cifs_add_credits(struct TCP_Server_Info *server,
const unsigned int add);
extern void cifs_set_credits(struct TCP_Server_Info *server, const int val);
extern int checkSMB(char *buf, unsigned int length);
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 *, bool);
extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool);
extern unsigned int smbCalcSize(struct smb_hdr *ptr);
extern int decode_negTokenInit(unsigned char *security_blob, int length,
struct TCP_Server_Info *server);
extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len);
extern int cifs_set_port(struct sockaddr *addr, const unsigned short int port);
extern int cifs_fill_sockaddr(struct sockaddr *dst, const char *src, int len,
const unsigned short int port);
extern int map_smb_to_linux_error(char *buf, bool logErr);
extern void header_assemble(struct smb_hdr *, char /* command */ ,
const struct cifs_tcon *, int /* length of
fixed section (word count) in two byte units */);
extern int small_smb_init_no_tc(const int smb_cmd, const int wct,
struct cifs_ses *ses,
void **request_buf);
extern int CIFS_SessSetup(unsigned int xid, struct cifs_ses *ses,
const struct nls_table *nls_cp);
extern __u64 GetNextMid(struct TCP_Server_Info *server);
extern struct timespec cifs_NTtimeToUnix(__le64 utc_nanoseconds_since_1601);
extern u64 cifs_UnixTimeToNT(struct timespec);
extern struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time,
int offset);
extern void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock);
extern struct cifsFileInfo *cifs_new_fileinfo(__u16 fileHandle,
struct file *file, struct tcon_link *tlink,
__u32 oplock);
extern int cifs_posix_open(char *full_path, struct inode **pinode,
struct super_block *sb,
int mode, unsigned int f_flags,
__u32 *poplock, __u16 *pnetfid, int xid);
void cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr);
extern void cifs_unix_basic_to_fattr(struct cifs_fattr *fattr,
FILE_UNIX_BASIC_INFO *info,
struct cifs_sb_info *cifs_sb);
extern void cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr);
extern struct inode *cifs_iget(struct super_block *sb,
struct cifs_fattr *fattr);
extern int cifs_get_file_info(struct file *filp);
extern int cifs_get_inode_info(struct inode **pinode,
const unsigned char *search_path,
FILE_ALL_INFO *pfile_info,
struct super_block *sb, int xid, const __u16 *pfid);
extern int cifs_get_file_info_unix(struct file *filp);
extern int cifs_get_inode_info_unix(struct inode **pinode,
const unsigned char *search_path,
struct super_block *sb, int xid);
extern int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb,
struct cifs_fattr *fattr, struct inode *inode,
const char *path, const __u16 *pfid);
extern int id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64,
uid_t, gid_t);
extern struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *, struct inode *,
const char *, u32 *);
extern int set_cifs_acl(struct cifs_ntsd *, __u32, struct inode *,
const char *, int);
extern void dequeue_mid(struct mid_q_entry *mid, bool malformed);
extern int cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
unsigned int to_read);
extern int cifs_readv_from_socket(struct TCP_Server_Info *server,
struct kvec *iov_orig, unsigned int nr_segs,
unsigned int to_read);
extern void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
struct cifs_sb_info *cifs_sb);
extern int cifs_match_super(struct super_block *, void *);
extern void cifs_cleanup_volume_info(struct smb_vol *pvolume_info);
extern struct smb_vol *cifs_get_volume_info(char *mount_data,
const char *devname);
extern int cifs_mount(struct cifs_sb_info *, struct smb_vol *);
extern void cifs_umount(struct cifs_sb_info *);
#if IS_ENABLED(CONFIG_CIFS_DFS_UPCALL)
extern void cifs_dfs_release_automount_timer(void);
#else /* ! IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) */
#define cifs_dfs_release_automount_timer() do { } while (0)
#endif /* ! IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) */
void cifs_proc_init(void);
void cifs_proc_clean(void);
extern int cifs_negotiate_protocol(unsigned int xid,
struct cifs_ses *ses);
extern int cifs_setup_session(unsigned int xid, struct cifs_ses *ses,
struct nls_table *nls_info);
extern int CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses);
extern int CIFSTCon(unsigned int xid, struct cifs_ses *ses,
const char *tree, struct cifs_tcon *tcon,
const struct nls_table *);
extern int CIFSFindFirst(const int xid, struct cifs_tcon *tcon,
const char *searchName, const struct nls_table *nls_codepage,
__u16 *searchHandle, struct cifs_search_info *psrch_inf,
int map, const char dirsep);
extern int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
__u16 searchHandle, struct cifs_search_info *psrch_inf);
extern int CIFSFindClose(const int, struct cifs_tcon *tcon,
const __u16 search_handle);
extern int CIFSSMBQFileInfo(const int xid, struct cifs_tcon *tcon,
u16 netfid, FILE_ALL_INFO *pFindData);
extern int CIFSSMBQPathInfo(const int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
FILE_ALL_INFO *findData,
int legacy /* whether to use old info level */,
const struct nls_table *nls_codepage, int remap);
extern int SMBQueryInformation(const int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
FILE_ALL_INFO *findData,
const struct nls_table *nls_codepage, int remap);
extern int CIFSSMBUnixQFileInfo(const int xid, struct cifs_tcon *tcon,
u16 netfid, FILE_UNIX_BASIC_INFO *pFindData);
extern int CIFSSMBUnixQPathInfo(const int xid,
struct cifs_tcon *tcon,
const unsigned char *searchName,
FILE_UNIX_BASIC_INFO *pFindData,
const struct nls_table *nls_codepage, int remap);
extern int CIFSGetDFSRefer(const int xid, struct cifs_ses *ses,
const unsigned char *searchName,
struct dfs_info3_param **target_nodes,
unsigned int *number_of_nodes_in_array,
const struct nls_table *nls_codepage, int remap);
extern int get_dfs_path(int xid, struct cifs_ses *pSesInfo,
const char *old_path,
const struct nls_table *nls_codepage,
unsigned int *pnum_referrals,
struct dfs_info3_param **preferrals,
int remap);
extern void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
struct smb_vol *vol);
extern int CIFSSMBQFSInfo(const int xid, struct cifs_tcon *tcon,
struct kstatfs *FSData);
extern int SMBOldQFSInfo(const int xid, struct cifs_tcon *tcon,
struct kstatfs *FSData);
extern int CIFSSMBSetFSUnixInfo(const int xid, struct cifs_tcon *tcon,
__u64 cap);
extern int CIFSSMBQFSAttributeInfo(const int xid,
struct cifs_tcon *tcon);
extern int CIFSSMBQFSDeviceInfo(const int xid, struct cifs_tcon *tcon);
extern int CIFSSMBQFSUnixInfo(const int xid, struct cifs_tcon *tcon);
extern int CIFSSMBQFSPosixInfo(const int xid, struct cifs_tcon *tcon,
struct kstatfs *FSData);
extern int CIFSSMBSetPathInfo(const int xid, struct cifs_tcon *tcon,
const char *fileName, const FILE_BASIC_INFO *data,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBSetFileInfo(const int xid, struct cifs_tcon *tcon,
const FILE_BASIC_INFO *data, __u16 fid,
__u32 pid_of_opener);
extern int CIFSSMBSetFileDisposition(const int xid, struct cifs_tcon *tcon,
bool delete_file, __u16 fid, __u32 pid_of_opener);
#if 0
extern int CIFSSMBSetAttrLegacy(int xid, struct cifs_tcon *tcon,
char *fileName, __u16 dos_attributes,
const struct nls_table *nls_codepage);
#endif /* possibly unneeded function */
extern int CIFSSMBSetEOF(const int xid, struct cifs_tcon *tcon,
const char *fileName, __u64 size,
bool setAllocationSizeFlag,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBSetFileSize(const int xid, struct cifs_tcon *tcon,
__u64 size, __u16 fileHandle, __u32 opener_pid,
bool AllocSizeFlag);
struct cifs_unix_set_info_args {
__u64 ctime;
__u64 atime;
__u64 mtime;
__u64 mode;
__u64 uid;
__u64 gid;
dev_t device;
};
extern int CIFSSMBUnixSetFileInfo(const int xid, struct cifs_tcon *tcon,
const struct cifs_unix_set_info_args *args,
u16 fid, u32 pid_of_opener);
extern int CIFSSMBUnixSetPathInfo(const int xid, struct cifs_tcon *pTcon,
char *fileName,
const struct cifs_unix_set_info_args *args,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBMkDir(const int xid, struct cifs_tcon *tcon,
const char *newName,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBRmDir(const int xid, struct cifs_tcon *tcon,
const char *name, const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSPOSIXDelFile(const int xid, struct cifs_tcon *tcon,
const char *name, __u16 type,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBDelFile(const int xid, struct cifs_tcon *tcon,
const char *name,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBRename(const int xid, struct cifs_tcon *tcon,
const char *fromName, const char *toName,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBRenameOpenFile(const int xid, struct cifs_tcon *pTcon,
int netfid, const char *target_name,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSCreateHardLink(const int xid,
struct cifs_tcon *tcon,
const char *fromName, const char *toName,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSUnixCreateHardLink(const int xid,
struct cifs_tcon *tcon,
const char *fromName, const char *toName,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSUnixCreateSymLink(const int xid,
struct cifs_tcon *tcon,
const char *fromName, const char *toName,
const struct nls_table *nls_codepage);
extern int CIFSSMBUnixQuerySymLink(const int xid,
struct cifs_tcon *tcon,
const unsigned char *searchName, char **syminfo,
const struct nls_table *nls_codepage);
#ifdef CONFIG_CIFS_SYMLINK_EXPERIMENTAL
extern int CIFSSMBQueryReparseLinkInfo(const int xid,
struct cifs_tcon *tcon,
const unsigned char *searchName,
char *symlinkinfo, const int buflen, __u16 fid,
const struct nls_table *nls_codepage);
#endif /* temporarily unused until cifs_symlink fixed */
extern int CIFSSMBOpen(const int xid, struct cifs_tcon *tcon,
const char *fileName, const int disposition,
const int access_flags, const int omode,
__u16 *netfid, int *pOplock, FILE_ALL_INFO *,
const struct nls_table *nls_codepage, int remap);
extern int SMBLegacyOpen(const int xid, struct cifs_tcon *tcon,
const char *fileName, const int disposition,
const int access_flags, const int omode,
__u16 *netfid, int *pOplock, FILE_ALL_INFO *,
const struct nls_table *nls_codepage, int remap);
extern int CIFSPOSIXCreate(const int xid, struct cifs_tcon *tcon,
u32 posix_flags, __u64 mode, __u16 *netfid,
FILE_UNIX_BASIC_INFO *pRetData,
__u32 *pOplock, const char *name,
const struct nls_table *nls_codepage, int remap);
extern int CIFSSMBClose(const int xid, struct cifs_tcon *tcon,
const int smb_file_id);
extern int CIFSSMBFlush(const int xid, struct cifs_tcon *tcon,
const int smb_file_id);
extern int CIFSSMBRead(const int xid, struct cifs_io_parms *io_parms,
unsigned int *nbytes, char **buf,
int *return_buf_type);
extern int CIFSSMBWrite(const int xid, struct cifs_io_parms *io_parms,
unsigned int *nbytes, const char *buf,
const char __user *ubuf, const int long_op);
extern int CIFSSMBWrite2(const int xid, struct cifs_io_parms *io_parms,
unsigned int *nbytes, struct kvec *iov, const int nvec,
const int long_op);
extern int CIFSGetSrvInodeNumber(const int xid, struct cifs_tcon *tcon,
const unsigned char *searchName, __u64 *inode_number,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int cifs_lockv(const int xid, struct cifs_tcon *tcon, const __u16 netfid,
const __u8 lock_type, const __u32 num_unlock,
const __u32 num_lock, LOCKING_ANDX_RANGE *buf);
extern int CIFSSMBLock(const int xid, struct cifs_tcon *tcon,
const __u16 netfid, const __u32 netpid, const __u64 len,
const __u64 offset, const __u32 numUnlock,
const __u32 numLock, const __u8 lockType,
const bool waitFlag, const __u8 oplock_level);
extern int CIFSSMBPosixLock(const int xid, struct cifs_tcon *tcon,
const __u16 smb_file_id, const __u32 netpid,
const int get_flag, const __u64 len, struct file_lock *,
const __u16 lock_type, const bool waitFlag);
extern int CIFSSMBTDis(const int xid, struct cifs_tcon *tcon);
extern int CIFSSMBEcho(struct TCP_Server_Info *server);
extern int CIFSSMBLogoff(const int xid, struct cifs_ses *ses);
extern struct cifs_ses *sesInfoAlloc(void);
extern void sesInfoFree(struct cifs_ses *);
extern struct cifs_tcon *tconInfoAlloc(void);
extern void tconInfoFree(struct cifs_tcon *);
extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *, __u32 *);
extern int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *,
__u32 *);
extern int cifs_verify_signature(struct kvec *iov, unsigned int nr_iov,
struct TCP_Server_Info *server,
__u32 expected_sequence_number);
extern int SMBNTencrypt(unsigned char *, unsigned char *, unsigned char *,
const struct nls_table *);
extern int setup_ntlm_response(struct cifs_ses *, const struct nls_table *);
extern int setup_ntlmv2_rsp(struct cifs_ses *, const struct nls_table *);
extern int cifs_crypto_shash_allocate(struct TCP_Server_Info *);
extern void cifs_crypto_shash_release(struct TCP_Server_Info *);
extern int calc_seckey(struct cifs_ses *);
#ifdef CONFIG_CIFS_WEAK_PW_HASH
extern int calc_lanman_hash(const char *password, const char *cryptkey,
bool encrypt, char *lnm_session_key);
#endif /* CIFS_WEAK_PW_HASH */
#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
extern int CIFSSMBNotify(const int xid, struct cifs_tcon *tcon,
const int notify_subdirs, const __u16 netfid,
__u32 filter, struct file *file, int multishot,
const struct nls_table *nls_codepage);
#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
extern int CIFSSMBCopy(int xid,
struct cifs_tcon *source_tcon,
const char *fromName,
const __u16 target_tid,
const char *toName, const int flags,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern ssize_t CIFSSMBQAllEAs(const int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
const unsigned char *ea_name, char *EAData,
size_t bufsize, const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBSetEA(const int xid, struct cifs_tcon *tcon,
const char *fileName, const char *ea_name,
const void *ea_value, const __u16 ea_value_len,
const struct nls_table *nls_codepage, int remap_special_chars);
extern int CIFSSMBGetCIFSACL(const int xid, struct cifs_tcon *tcon,
__u16 fid, struct cifs_ntsd **acl_inf, __u32 *buflen);
extern int CIFSSMBSetCIFSACL(const int, struct cifs_tcon *, __u16,
struct cifs_ntsd *, __u32, int);
extern int CIFSSMBGetPosixACL(const int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
char *acl_inf, const int buflen, const int acl_type,
const struct nls_table *nls_codepage, int remap_special_chars);
extern int CIFSSMBSetPosixACL(const int xid, struct cifs_tcon *tcon,
const unsigned char *fileName,
const char *local_acl, const int buflen, const int acl_type,
const struct nls_table *nls_codepage, int remap_special_chars);
extern int CIFSGetExtAttr(const int xid, struct cifs_tcon *tcon,
const int netfid, __u64 *pExtAttrBits, __u64 *pMask);
extern void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb);
extern bool CIFSCouldBeMFSymlink(const struct cifs_fattr *fattr);
extern int CIFSCheckMFSymlink(struct cifs_fattr *fattr,
const unsigned char *path,
struct cifs_sb_info *cifs_sb, int xid);
extern int mdfour(unsigned char *, unsigned char *, int);
extern int E_md4hash(const unsigned char *passwd, unsigned char *p16,
const struct nls_table *codepage);
extern int SMBencrypt(unsigned char *passwd, const unsigned char *c8,
unsigned char *p24);
/* asynchronous read support */
struct cifs_readdata {
struct kref refcount;
struct list_head list;
struct completion done;
struct cifsFileInfo *cfile;
struct address_space *mapping;
__u64 offset;
unsigned int bytes;
pid_t pid;
int result;
struct list_head pages;
struct work_struct work;
int (*marshal_iov) (struct cifs_readdata *rdata,
unsigned int remaining);
unsigned int nr_iov;
struct kvec iov[1];
};
void cifs_readdata_release(struct kref *refcount);
int cifs_async_readv(struct cifs_readdata *rdata);
/* asynchronous write support */
struct cifs_writedata {
struct kref refcount;
struct list_head list;
struct completion done;
enum writeback_sync_modes sync_mode;
struct work_struct work;
struct cifsFileInfo *cfile;
__u64 offset;
pid_t pid;
unsigned int bytes;
int result;
void (*marshal_iov) (struct kvec *iov,
struct cifs_writedata *wdata);
unsigned int nr_pages;
struct page *pages[1];
};
int cifs_async_writev(struct cifs_writedata *wdata);
void cifs_writev_complete(struct work_struct *work);
struct cifs_writedata *cifs_writedata_alloc(unsigned int nr_pages,
work_func_t complete);
void cifs_writedata_release(struct kref *refcount);
#endif /* _CIFSPROTO_H */
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