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16d0556568
linux/fs/cifs/cifsproto.h
Paulo Alcantara 76894f3e2f cifs: improve symlink handling for smb2+ 
When creating inode for symlink, the client used to send below
requests to fill it in:

    * create+query_info+close (STATUS_STOPPED_ON_SYMLINK)
    * create(+reparse_flag)+query_info+close (set file attrs)
    * create+ioctl(get_reparse)+close (query reparse tag)

and then for every access to the symlink dentry, the ->link() method
would send another:

    * create+ioctl(get_reparse)+close (parse symlink)

So, in order to improve:

    (i) Get rid of unnecessary roundtrips and then resolve symlinks as
	follows:

        * create+query_info+close (STATUS_STOPPED_ON_SYMLINK +
	                           parse symlink + get reparse tag)
        * create(+reparse_flag)+query_info+close (set file attrs)

    (ii) Set the resolved symlink target directly in inode->i_link and
         use simple_get_link() for ->link() to simply return it.

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13 09:36:04 -05:00

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/* SPDX-License-Identifier: LGPL-2.1 */
/*
*
* Copyright (c) International Business Machines Corp., 2002,2008
* Author(s): Steve French (sfrench@us.ibm.com)
*
*/
#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 const char *build_path_from_dentry(struct dentry *, void *);
extern char *build_path_from_dentry_optional_prefix(struct dentry *direntry,
void *page, bool prefix);
static inline void *alloc_dentry_path(void)
{
return __getname();
}
static inline void free_dentry_path(void *page)
{
if (page)
__putname(page);
}
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,
char **devname);
extern void delete_mid(struct mid_q_entry *mid);
extern void release_mid(struct mid_q_entry *mid);
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 int smb3_parse_opt(const char *options, const char *key, char **val);
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);
void
cifs_signal_cifsd_for_reconnect(struct TCP_Server_Info *server,
bool all_channels);
void
cifs_mark_tcp_ses_conns_for_reconnect(struct TCP_Server_Info *server,
bool mark_smb_session);
extern int cifs_reconnect(struct TCP_Server_Info *server,
bool mark_smb_session);
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);
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 void cifs_set_port(struct sockaddr *addr, const unsigned short int port);
extern int map_smb_to_linux_error(char *buf, bool logErr);
extern int map_and_check_smb_error(struct mid_q_entry *mid, 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 enum securityEnum select_sectype(struct TCP_Server_Info *server,
enum securityEnum requested);
extern int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
struct TCP_Server_Info *server,
const struct nls_table *nls_cp);
extern struct timespec64 cifs_NTtimeToUnix(__le64 utc_nanoseconds_since_1601);
extern u64 cifs_UnixTimeToNT(struct timespec64);
extern struct timespec64 cnvrtDosUnixTm(__le16 le_date, __le16 le_time,
int offset);
extern void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock);
extern int cifs_get_writer(struct cifsInodeInfo *cinode);
extern void cifs_put_writer(struct cifsInodeInfo *cinode);
extern void cifs_done_oplock_break(struct cifsInodeInfo *cinode);
extern int cifs_unlock_range(struct cifsFileInfo *cfile,
struct file_lock *flock, const unsigned int xid);
extern int cifs_push_mandatory_locks(struct cifsFileInfo *cfile);
extern void cifs_down_write(struct rw_semaphore *sem);
struct cifsFileInfo *cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
struct tcon_link *tlink, __u32 oplock,
const char *symlink_target);
extern int cifs_posix_open(const char *full_path, struct inode **inode,
struct super_block *sb, int mode,
unsigned int f_flags, __u32 *oplock, __u16 *netfid,
unsigned 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_dir_info_to_fattr(struct cifs_fattr *, FILE_DIRECTORY_INFO *,
struct cifs_sb_info *);
extern int cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr);
extern struct inode *cifs_iget(struct super_block *sb,
struct cifs_fattr *fattr);
int cifs_get_inode_info(struct inode **inode, const char *full_path,
struct cifs_open_info_data *data, struct super_block *sb, int xid,
const struct cifs_fid *fid);
extern int smb311_posix_get_inode_info(struct inode **pinode, const char *search_path,
struct super_block *sb, unsigned int xid);
extern int cifs_get_inode_info_unix(struct inode **pinode,
const unsigned char *search_path,
struct super_block *sb, unsigned int xid);
extern int cifs_set_file_info(struct inode *inode, struct iattr *attrs,
unsigned int xid, const char *full_path, __u32 dosattr);
extern int cifs_rename_pending_delete(const char *full_path,
struct dentry *dentry,
const unsigned int xid);
extern int sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
struct cifs_fattr *fattr, uint sidtype);
extern int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb,
struct cifs_fattr *fattr, struct inode *inode,
bool get_mode_from_special_sid,
const char *path, const struct cifs_fid *pfid);
extern int id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 *pnmode,
kuid_t uid, kgid_t gid);
extern struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *, struct inode *,
const char *, u32 *, u32);
extern struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *,
const struct cifs_fid *, u32 *, u32);
extern int set_cifs_acl(struct cifs_ntsd *, __u32, struct inode *,
const char *, int);
extern unsigned int setup_authusers_ACE(struct cifs_ace *pace);
extern unsigned int setup_special_mode_ACE(struct cifs_ace *pace, __u64 nmode);
extern unsigned int setup_special_user_owner_ACE(struct cifs_ace *pace);
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 ssize_t cifs_discard_from_socket(struct TCP_Server_Info *server,
size_t to_read);
extern int cifs_read_page_from_socket(struct TCP_Server_Info *server,
struct page *page,
unsigned int page_offset,
unsigned int to_read);
extern int cifs_setup_cifs_sb(struct cifs_sb_info *cifs_sb);
extern int cifs_match_super(struct super_block *, void *);
extern int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx);
extern void cifs_umount(struct cifs_sb_info *);
extern void cifs_mark_open_files_invalid(struct cifs_tcon *tcon);
extern void cifs_reopen_persistent_handles(struct cifs_tcon *tcon);
extern bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset,
__u64 length, __u8 type, __u16 flags,
struct cifsLockInfo **conf_lock,
int rw_check);
extern void cifs_add_pending_open(struct cifs_fid *fid,
struct tcon_link *tlink,
struct cifs_pending_open *open);
extern void cifs_add_pending_open_locked(struct cifs_fid *fid,
struct tcon_link *tlink,
struct cifs_pending_open *open);
extern void cifs_del_pending_open(struct cifs_pending_open *open);
extern bool cifs_is_deferred_close(struct cifsFileInfo *cfile,
struct cifs_deferred_close **dclose);
extern void cifs_add_deferred_close(struct cifsFileInfo *cfile,
struct cifs_deferred_close *dclose);
extern void cifs_del_deferred_close(struct cifsFileInfo *cfile);
extern void cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode);
extern void cifs_close_all_deferred_files(struct cifs_tcon *cifs_tcon);
extern void cifs_close_deferred_file_under_dentry(struct cifs_tcon *cifs_tcon,
const char *path);
extern struct TCP_Server_Info *
cifs_get_tcp_session(struct smb3_fs_context *ctx,
struct TCP_Server_Info *primary_server);
extern void cifs_put_tcp_session(struct TCP_Server_Info *server,
int from_reconnect);
extern void cifs_put_tcon(struct cifs_tcon *tcon);
#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 void cifs_move_llist(struct list_head *source, struct list_head *dest);
extern void cifs_free_llist(struct list_head *llist);
extern void cifs_del_lock_waiters(struct cifsLockInfo *lock);
extern int cifs_tree_connect(const unsigned int xid, struct cifs_tcon *tcon,
const struct nls_table *nlsc);
extern int cifs_negotiate_protocol(const unsigned int xid,
struct cifs_ses *ses,
struct TCP_Server_Info *server);
extern int cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
struct TCP_Server_Info *server,
struct nls_table *nls_info);
extern int cifs_enable_signing(struct TCP_Server_Info *server, bool mnt_sign_required);
extern int CIFSSMBNegotiate(const unsigned int xid,
struct cifs_ses *ses,
struct TCP_Server_Info *server);
extern int CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
const char *tree, struct cifs_tcon *tcon,
const struct nls_table *);
extern int CIFSFindFirst(const unsigned int xid, struct cifs_tcon *tcon,
const char *searchName, struct cifs_sb_info *cifs_sb,
__u16 *searchHandle, __u16 search_flags,
struct cifs_search_info *psrch_inf,
bool msearch);
extern int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon,
__u16 searchHandle, __u16 search_flags,
struct cifs_search_info *psrch_inf);
extern int CIFSFindClose(const unsigned int xid, struct cifs_tcon *tcon,
const __u16 search_handle);
extern int CIFSSMBQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
u16 netfid, FILE_ALL_INFO *pFindData);
extern int CIFSSMBQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
const char *search_Name, FILE_ALL_INFO *data,
int legacy /* whether to use old info level */,
const struct nls_table *nls_codepage, int remap);
extern int SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
const char *search_name, FILE_ALL_INFO *data,
const struct nls_table *nls_codepage, int remap);
extern int CIFSSMBUnixQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
u16 netfid, FILE_UNIX_BASIC_INFO *pFindData);
extern int CIFSSMBUnixQPathInfo(const unsigned 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 unsigned int xid, struct cifs_ses *ses,
const char *search_name,
struct dfs_info3_param **target_nodes,
unsigned int *num_of_nodes,
const struct nls_table *nls_codepage, int remap);
extern int parse_dfs_referrals(struct get_dfs_referral_rsp *rsp, u32 rsp_size,
unsigned int *num_of_nodes,
struct dfs_info3_param **target_nodes,
const struct nls_table *nls_codepage, int remap,
const char *searchName, bool is_unicode);
extern void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
struct smb3_fs_context *ctx);
extern int CIFSSMBQFSInfo(const unsigned int xid, struct cifs_tcon *tcon,
struct kstatfs *FSData);
extern int SMBOldQFSInfo(const unsigned int xid, struct cifs_tcon *tcon,
struct kstatfs *FSData);
extern int CIFSSMBSetFSUnixInfo(const unsigned int xid, struct cifs_tcon *tcon,
__u64 cap);
extern int CIFSSMBQFSAttributeInfo(const unsigned int xid,
struct cifs_tcon *tcon);
extern int CIFSSMBQFSDeviceInfo(const unsigned int xid, struct cifs_tcon *tcon);
extern int CIFSSMBQFSUnixInfo(const unsigned int xid, struct cifs_tcon *tcon);
extern int CIFSSMBQFSPosixInfo(const unsigned int xid, struct cifs_tcon *tcon,
struct kstatfs *FSData);
extern int CIFSSMBSetPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
const char *fileName, const FILE_BASIC_INFO *data,
const struct nls_table *nls_codepage,
struct cifs_sb_info *cifs_sb);
extern int CIFSSMBSetFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
const FILE_BASIC_INFO *data, __u16 fid,
__u32 pid_of_opener);
extern int CIFSSMBSetFileDisposition(const unsigned int xid,
struct cifs_tcon *tcon,
bool delete_file, __u16 fid,
__u32 pid_of_opener);
extern int CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon,
const char *file_name, __u64 size,
struct cifs_sb_info *cifs_sb, bool set_allocation);
extern int CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, __u64 size,
bool set_allocation);
struct cifs_unix_set_info_args {
__u64 ctime;
__u64 atime;
__u64 mtime;
__u64 mode;
kuid_t uid;
kgid_t gid;
dev_t device;
};
extern int CIFSSMBUnixSetFileInfo(const unsigned int xid,
struct cifs_tcon *tcon,
const struct cifs_unix_set_info_args *args,
u16 fid, u32 pid_of_opener);
extern int CIFSSMBUnixSetPathInfo(const unsigned int xid,
struct cifs_tcon *tcon, const char *file_name,
const struct cifs_unix_set_info_args *args,
const struct nls_table *nls_codepage,
int remap);
extern int CIFSSMBMkDir(const unsigned int xid, struct inode *inode,
umode_t mode, struct cifs_tcon *tcon,
const char *name, struct cifs_sb_info *cifs_sb);
extern int CIFSSMBRmDir(const unsigned int xid, struct cifs_tcon *tcon,
const char *name, struct cifs_sb_info *cifs_sb);
extern int CIFSPOSIXDelFile(const unsigned 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 unsigned int xid, struct cifs_tcon *tcon,
const char *name, struct cifs_sb_info *cifs_sb);
extern int CIFSSMBRename(const unsigned int xid, struct cifs_tcon *tcon,
const char *from_name, const char *to_name,
struct cifs_sb_info *cifs_sb);
extern int CIFSSMBRenameOpenFile(const unsigned int xid, struct cifs_tcon *tcon,
int netfid, const char *target_name,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon,
const char *from_name, const char *to_name,
struct cifs_sb_info *cifs_sb);
extern int CIFSUnixCreateHardLink(const unsigned 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 unsigned int xid,
struct cifs_tcon *tcon,
const char *fromName, const char *toName,
const struct nls_table *nls_codepage, int remap);
extern int CIFSSMBUnixQuerySymLink(const unsigned int xid,
struct cifs_tcon *tcon,
const unsigned char *searchName, char **syminfo,
const struct nls_table *nls_codepage, int remap);
extern int CIFSSMBQuerySymLink(const unsigned int xid, struct cifs_tcon *tcon,
__u16 fid, char **symlinkinfo,
const struct nls_table *nls_codepage);
extern int CIFSSMB_set_compression(const unsigned int xid,
struct cifs_tcon *tcon, __u16 fid);
extern int CIFS_open(const unsigned int xid, struct cifs_open_parms *oparms,
int *oplock, FILE_ALL_INFO *buf);
extern int SMBLegacyOpen(const unsigned 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 unsigned 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 unsigned int xid, struct cifs_tcon *tcon,
const int smb_file_id);
extern int CIFSSMBFlush(const unsigned int xid, struct cifs_tcon *tcon,
const int smb_file_id);
extern int CIFSSMBRead(const unsigned int xid, struct cifs_io_parms *io_parms,
unsigned int *nbytes, char **buf,
int *return_buf_type);
extern int CIFSSMBWrite(const unsigned int xid, struct cifs_io_parms *io_parms,
unsigned int *nbytes, const char *buf);
extern int CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
unsigned int *nbytes, struct kvec *iov, const int nvec);
extern int CIFSGetSrvInodeNumber(const unsigned int xid, struct cifs_tcon *tcon,
const char *search_name, __u64 *inode_number,
const struct nls_table *nls_codepage,
int remap);
extern int cifs_lockv(const unsigned 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 unsigned 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 unsigned int xid, struct cifs_tcon *tcon,
const __u16 smb_file_id, const __u32 netpid,
const loff_t start_offset, const __u64 len,
struct file_lock *, const __u16 lock_type,
const bool waitFlag);
extern int CIFSSMBTDis(const unsigned int xid, struct cifs_tcon *tcon);
extern int CIFSSMBEcho(struct TCP_Server_Info *server);
extern int CIFSSMBLogoff(const unsigned 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_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
__u32 *pexpected_response_sequence_number);
extern int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *,
__u32 *);
extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *, __u32 *);
extern int cifs_verify_signature(struct smb_rqst *rqst,
struct TCP_Server_Info *server,
__u32 expected_sequence_number);
extern int setup_ntlmv2_rsp(struct cifs_ses *, const struct nls_table *);
extern void cifs_crypto_secmech_release(struct TCP_Server_Info *server);
extern int calc_seckey(struct cifs_ses *);
extern int generate_smb30signingkey(struct cifs_ses *ses,
struct TCP_Server_Info *server);
extern int generate_smb311signingkey(struct cifs_ses *ses,
struct TCP_Server_Info *server);
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
extern int CIFSSMBCopy(unsigned 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 unsigned int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
const unsigned char *ea_name, char *EAData,
size_t bufsize, struct cifs_sb_info *cifs_sb);
extern int CIFSSMBSetEA(const unsigned 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,
struct cifs_sb_info *cifs_sb);
extern int CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon,
__u16 fid, struct cifs_ntsd **acl_inf, __u32 *buflen);
extern int CIFSSMBSetCIFSACL(const unsigned int, struct cifs_tcon *, __u16,
struct cifs_ntsd *, __u32, int);
extern int CIFSSMBGetPosixACL(const unsigned 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 unsigned 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 unsigned int xid, struct cifs_tcon *tcon,
const int netfid, __u64 *pExtAttrBits, __u64 *pMask);
#endif /* CIFS_ALLOW_INSECURE_LEGACY */
extern void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb);
extern bool couldbe_mf_symlink(const struct cifs_fattr *fattr);
extern int check_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
struct cifs_fattr *fattr,
const unsigned char *path);
extern int E_md4hash(const unsigned char *passwd, unsigned char *p16,
const struct nls_table *codepage);
extern int
cifs_setup_volume_info(struct smb3_fs_context *ctx, const char *mntopts, const char *devname);
extern struct TCP_Server_Info *
cifs_find_tcp_session(struct smb3_fs_context *ctx);
extern void cifs_put_smb_ses(struct cifs_ses *ses);
extern struct cifs_ses *
cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx);
void cifs_readdata_release(struct kref *refcount);
int cifs_async_readv(struct cifs_readdata *rdata);
int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid);
int cifs_async_writev(struct cifs_writedata *wdata,
void (*release)(struct kref *kref));
void cifs_writev_complete(struct work_struct *work);
struct cifs_writedata *cifs_writedata_alloc(unsigned int nr_pages,
work_func_t complete);
struct cifs_writedata *cifs_writedata_direct_alloc(struct page **pages,
work_func_t complete);
void cifs_writedata_release(struct kref *refcount);
int cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
const unsigned char *path, char *pbuf,
unsigned int *pbytes_read);
int cifs_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
const unsigned char *path, char *pbuf,
unsigned int *pbytes_written);
int __cifs_calc_signature(struct smb_rqst *rqst,
struct TCP_Server_Info *server, char *signature,
struct shash_desc *shash);
enum securityEnum cifs_select_sectype(struct TCP_Server_Info *,
enum securityEnum);
struct cifs_aio_ctx *cifs_aio_ctx_alloc(void);
void cifs_aio_ctx_release(struct kref *refcount);
int setup_aio_ctx_iter(struct cifs_aio_ctx *ctx, struct iov_iter *iter, int rw);
int cifs_alloc_hash(const char *name, struct shash_desc **sdesc);
void cifs_free_hash(struct shash_desc **sdesc);
extern void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page,
unsigned int *len, unsigned int *offset);
struct cifs_chan *
cifs_ses_find_chan(struct cifs_ses *ses, struct TCP_Server_Info *server);
int cifs_try_adding_channels(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses);
bool is_server_using_iface(struct TCP_Server_Info *server,
struct cifs_server_iface *iface);
bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface);
void cifs_ses_mark_for_reconnect(struct cifs_ses *ses);
unsigned int
cifs_ses_get_chan_index(struct cifs_ses *ses,
struct TCP_Server_Info *server);
void
cifs_chan_set_in_reconnect(struct cifs_ses *ses,
struct TCP_Server_Info *server);
void
cifs_chan_clear_in_reconnect(struct cifs_ses *ses,
struct TCP_Server_Info *server);
bool
cifs_chan_in_reconnect(struct cifs_ses *ses,
struct TCP_Server_Info *server);
void
cifs_chan_set_need_reconnect(struct cifs_ses *ses,
struct TCP_Server_Info *server);
void
cifs_chan_clear_need_reconnect(struct cifs_ses *ses,
struct TCP_Server_Info *server);
bool
cifs_chan_needs_reconnect(struct cifs_ses *ses,
struct TCP_Server_Info *server);
bool
cifs_chan_is_iface_active(struct cifs_ses *ses,
struct TCP_Server_Info *server);
int
cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server);
int
SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount);
void extract_unc_hostname(const char *unc, const char **h, size_t *len);
int copy_path_name(char *dst, const char *src);
int smb2_parse_query_directory(struct cifs_tcon *tcon, struct kvec *rsp_iov,
int resp_buftype,
struct cifs_search_info *srch_inf);
struct super_block *cifs_get_tcp_super(struct TCP_Server_Info *server);
void cifs_put_tcp_super(struct super_block *sb);
int cifs_update_super_prepath(struct cifs_sb_info *cifs_sb, char *prefix);
char *extract_hostname(const char *unc);
char *extract_sharename(const char *unc);
#ifdef CONFIG_CIFS_DFS_UPCALL
static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses,
const char *old_path,
const struct nls_table *nls_codepage,
struct dfs_info3_param *referral, int remap)
{
return dfs_cache_find(xid, ses, nls_codepage, remap, old_path,
referral, NULL);
}
int match_target_ip(struct TCP_Server_Info *server,
const char *share, size_t share_len,
bool *result);
int cifs_dfs_query_info_nonascii_quirk(const unsigned int xid,
struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
const char *dfs_link_path);
#endif
static inline int cifs_create_options(struct cifs_sb_info *cifs_sb, int options)
{
if (cifs_sb && (backup_cred(cifs_sb)))
return options | CREATE_OPEN_BACKUP_INTENT;
else
return options;
}
struct super_block *cifs_get_tcon_super(struct cifs_tcon *tcon);
void cifs_put_tcon_super(struct super_block *sb);
#endif /* _CIFSPROTO_H */
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