1 /* SPDX-License-Identifier: LGPL-2.1 */ 2 /* 3 * 4 * Copyright (c) International Business Machines Corp., 2002,2008 5 * Author(s): Steve French (sfrench@us.ibm.com) 6 * 7 */ 8 #ifndef _CIFSPROTO_H 9 #define _CIFSPROTO_H 10 #include <linux/nls.h> 11 #include <linux/ctype.h> 12 #include "cifsglob.h" 13 #include "trace.h" 14 #ifdef CONFIG_CIFS_DFS_UPCALL 15 #include "dfs_cache.h" 16 #endif 17 #include "smb1proto.h" 18 19 struct statfs; 20 struct smb_rqst; 21 struct smb3_fs_context; 22 23 /* 24 ***************************************************************** 25 * All Prototypes 26 ***************************************************************** 27 */ 28 29 void *cifs_buf_get(void); 30 void cifs_buf_release(void *buf_to_free); 31 void *cifs_small_buf_get(void); 32 void cifs_small_buf_release(void *buf_to_free); 33 void free_rsp_buf(int resp_buftype, void *rsp); 34 int smb_send_kvec(struct TCP_Server_Info *server, struct msghdr *smb_msg, 35 size_t *sent); 36 unsigned int _get_xid(void); 37 void _free_xid(unsigned int xid); 38 #define get_xid() \ 39 ({ \ 40 unsigned int __xid = _get_xid(); \ 41 cifs_dbg(FYI, "VFS: in %s as Xid: %u with uid: %d\n", \ 42 __func__, __xid, \ 43 from_kuid(&init_user_ns, current_fsuid())); \ 44 trace_smb3_enter(__xid, __func__); \ 45 __xid; \ 46 }) 47 48 #define free_xid(curr_xid) \ 49 do { \ 50 _free_xid(curr_xid); \ 51 cifs_dbg(FYI, "VFS: leaving %s (xid = %u) rc = %d\n", \ 52 __func__, curr_xid, (int)rc); \ 53 if (rc) \ 54 trace_smb3_exit_err(curr_xid, __func__, (int)rc); \ 55 else \ 56 trace_smb3_exit_done(curr_xid, __func__); \ 57 } while (0) 58 int init_cifs_idmap(void); 59 void exit_cifs_idmap(void); 60 int init_cifs_spnego(void); 61 void exit_cifs_spnego(void); 62 const char *build_path_from_dentry(struct dentry *direntry, void *page); 63 char *__build_path_from_dentry_optional_prefix(struct dentry *direntry, 64 void *page, const char *tree, 65 int tree_len, bool prefix); 66 char *build_path_from_dentry_optional_prefix(struct dentry *direntry, 67 void *page, bool prefix); 68 static inline void *alloc_dentry_path(void) 69 { 70 return __getname(); 71 } 72 73 static inline void free_dentry_path(void *page) 74 { 75 if (page) 76 __putname(page); 77 } 78 79 char *cifs_build_path_to_root(struct smb3_fs_context *ctx, 80 struct cifs_sb_info *cifs_sb, 81 struct cifs_tcon *tcon, int add_treename); 82 char *cifs_build_devname(char *nodename, const char *prepath); 83 void delete_mid(struct TCP_Server_Info *server, struct mid_q_entry *mid); 84 void __release_mid(struct TCP_Server_Info *server, 85 struct mid_q_entry *midEntry); 86 void cifs_wake_up_task(struct TCP_Server_Info *server, 87 struct mid_q_entry *mid); 88 int cifs_handle_standard(struct TCP_Server_Info *server, 89 struct mid_q_entry *mid); 90 char *smb3_fs_context_fullpath(const struct smb3_fs_context *ctx, char dirsep); 91 int smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx); 92 int smb3_parse_opt(const char *options, const char *key, char **val); 93 int cifs_ipaddr_cmp(struct sockaddr *srcaddr, struct sockaddr *rhs); 94 bool cifs_match_ipaddr(struct sockaddr *srcaddr, struct sockaddr *rhs); 95 int cifs_discard_remaining_data(struct TCP_Server_Info *server); 96 int cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst, 97 mid_receive_t receive, mid_callback_t callback, 98 mid_handle_t handle, void *cbdata, const int flags, 99 const struct cifs_credits *exist_credits); 100 struct TCP_Server_Info *cifs_pick_channel(struct cifs_ses *ses); 101 int cifs_send_recv(const unsigned int xid, struct cifs_ses *ses, 102 struct TCP_Server_Info *server, struct smb_rqst *rqst, 103 int *resp_buf_type, const int flags, struct kvec *resp_iov); 104 int compound_send_recv(const unsigned int xid, struct cifs_ses *ses, 105 struct TCP_Server_Info *server, const int flags, 106 const int num_rqst, struct smb_rqst *rqst, 107 int *resp_buf_type, struct kvec *resp_iov); 108 int cifs_sync_mid_result(struct mid_q_entry *mid, 109 struct TCP_Server_Info *server); 110 int __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst, 111 struct smb_rqst *rqst); 112 int wait_for_free_request(struct TCP_Server_Info *server, const int flags, 113 unsigned int *instance); 114 int cifs_wait_mtu_credits(struct TCP_Server_Info *server, size_t size, 115 size_t *num, struct cifs_credits *credits); 116 117 static inline int 118 send_cancel(struct cifs_ses *ses, struct TCP_Server_Info *server, 119 struct smb_rqst *rqst, struct mid_q_entry *mid, 120 unsigned int xid) 121 { 122 return server->ops->send_cancel ? 123 server->ops->send_cancel(ses, server, rqst, mid, xid) : 0; 124 } 125 126 int wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *mid); 127 128 void smb2_query_server_interfaces(struct work_struct *work); 129 void cifs_signal_cifsd_for_reconnect(struct TCP_Server_Info *server, 130 bool all_channels); 131 void cifs_mark_tcp_ses_conns_for_reconnect(struct TCP_Server_Info *server, 132 bool mark_smb_session); 133 int cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session); 134 bool backup_cred(struct cifs_sb_info *cifs_sb); 135 bool is_size_safe_to_change(struct cifsInodeInfo *cifsInode, __u64 end_of_file, 136 bool from_readdir); 137 void cifs_write_subrequest_terminated(struct cifs_io_subrequest *wdata, 138 ssize_t result); 139 struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode, 140 int flags); 141 int __cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, 142 unsigned int find_flags, unsigned int open_flags, 143 struct cifsFileInfo **ret_file); 144 int cifs_get_writable_path(struct cifs_tcon *tcon, const char *name, 145 struct inode *inode, int flags, 146 struct cifsFileInfo **ret_file); 147 struct cifsFileInfo *__find_readable_file(struct cifsInodeInfo *cifs_inode, 148 unsigned int find_flags, 149 unsigned int open_flags); 150 int cifs_get_readable_path(struct cifs_tcon *tcon, const char *name, 151 struct cifsFileInfo **ret_file); 152 int cifs_get_hardlink_path(struct cifs_tcon *tcon, struct inode *inode, 153 struct file *file); 154 int decode_negTokenInit(unsigned char *security_blob, int length, 155 struct TCP_Server_Info *server); 156 int cifs_convert_address(struct sockaddr *dst, const char *src, int len); 157 void cifs_set_port(struct sockaddr *addr, const unsigned short int port); 158 struct timespec64 cifs_NTtimeToUnix(__le64 ntutc); 159 u64 cifs_UnixTimeToNT(struct timespec64 t); 160 struct timespec64 cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset); 161 void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock); 162 int cifs_get_writer(struct cifsInodeInfo *cinode); 163 void cifs_put_writer(struct cifsInodeInfo *cinode); 164 void cifs_done_oplock_break(struct cifsInodeInfo *cinode); 165 int cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, 166 unsigned int xid); 167 int cifs_push_mandatory_locks(struct cifsFileInfo *cfile); 168 169 void cifs_down_write(struct rw_semaphore *sem); 170 struct cifsFileInfo *cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, 171 struct tcon_link *tlink, __u32 oplock, 172 const char *symlink_target); 173 int cifs_posix_open(const char *full_path, struct inode **pinode, 174 struct super_block *sb, int mode, unsigned int f_flags, 175 __u32 *poplock, __u16 *pnetfid, unsigned int xid); 176 void cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr); 177 void cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, 178 FILE_UNIX_BASIC_INFO *info, 179 struct cifs_sb_info *cifs_sb); 180 void cifs_dir_info_to_fattr(struct cifs_fattr *fattr, 181 FILE_DIRECTORY_INFO *info, 182 struct cifs_sb_info *cifs_sb); 183 int cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr, 184 bool from_readdir); 185 struct inode *cifs_iget(struct super_block *sb, struct cifs_fattr *fattr); 186 187 int cifs_get_inode_info(struct inode **inode, const char *full_path, 188 struct cifs_open_info_data *data, 189 struct super_block *sb, int xid, 190 const struct cifs_fid *fid); 191 int smb311_posix_get_inode_info(struct inode **inode, const char *full_path, 192 struct cifs_open_info_data *data, 193 struct super_block *sb, 194 const unsigned int xid); 195 int cifs_get_inode_info_unix(struct inode **pinode, 196 const unsigned char *full_path, 197 struct super_block *sb, unsigned int xid); 198 int cifs_set_file_info(struct inode *inode, struct iattr *attrs, 199 unsigned int xid, const char *full_path, __u32 dosattr); 200 int cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, 201 const unsigned int xid); 202 int sid_to_id(struct cifs_sb_info *cifs_sb, struct smb_sid *psid, 203 struct cifs_fattr *fattr, uint sidtype); 204 int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, 205 struct inode *inode, bool mode_from_special_sid, 206 const char *path, const struct cifs_fid *pfid); 207 int id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 *pnmode, 208 kuid_t uid, kgid_t gid); 209 struct smb_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb, 210 struct inode *inode, const char *path, 211 u32 *pacllen, u32 info); 212 struct smb_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, 213 const struct cifs_fid *cifsfid, 214 u32 *pacllen, u32 info); 215 struct posix_acl *cifs_get_acl(struct mnt_idmap *idmap, struct dentry *dentry, 216 int type); 217 int cifs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, 218 struct posix_acl *acl, int type); 219 int set_cifs_acl(struct smb_ntsd *pnntsd, __u32 acllen, struct inode *inode, 220 const char *path, int aclflag); 221 unsigned int setup_authusers_ACE(struct smb_ace *pntace); 222 unsigned int setup_special_mode_ACE(struct smb_ace *pntace, bool posix, 223 __u64 nmode); 224 unsigned int setup_special_user_owner_ACE(struct smb_ace *pntace); 225 226 void dequeue_mid(struct TCP_Server_Info *server, struct mid_q_entry *mid, 227 bool malformed); 228 int cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, 229 unsigned int to_read); 230 ssize_t cifs_discard_from_socket(struct TCP_Server_Info *server, 231 size_t to_read); 232 int cifs_read_iter_from_socket(struct TCP_Server_Info *server, 233 struct iov_iter *iter, unsigned int to_read); 234 int cifs_setup_cifs_sb(struct cifs_sb_info *cifs_sb); 235 void cifs_mount_put_conns(struct cifs_mount_ctx *mnt_ctx); 236 int cifs_mount_get_session(struct cifs_mount_ctx *mnt_ctx); 237 int cifs_is_path_remote(struct cifs_mount_ctx *mnt_ctx); 238 int cifs_mount_get_tcon(struct cifs_mount_ctx *mnt_ctx); 239 int cifs_match_super(struct super_block *sb, void *data); 240 int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx); 241 void cifs_umount(struct cifs_sb_info *cifs_sb); 242 void cifs_mark_open_files_invalid(struct cifs_tcon *tcon); 243 void cifs_reopen_persistent_handles(struct cifs_tcon *tcon); 244 245 bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, 246 __u64 length, __u8 type, __u16 flags, 247 struct cifsLockInfo **conf_lock, int rw_check); 248 void cifs_add_pending_open(struct cifs_fid *fid, struct tcon_link *tlink, 249 struct cifs_pending_open *open); 250 void cifs_add_pending_open_locked(struct cifs_fid *fid, 251 struct tcon_link *tlink, 252 struct cifs_pending_open *open); 253 void cifs_del_pending_open(struct cifs_pending_open *open); 254 255 bool cifs_is_deferred_close(struct cifsFileInfo *cfile, 256 struct cifs_deferred_close **pdclose); 257 258 void cifs_add_deferred_close(struct cifsFileInfo *cfile, 259 struct cifs_deferred_close *dclose); 260 261 void cifs_del_deferred_close(struct cifsFileInfo *cfile); 262 263 void cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode); 264 265 void cifs_close_all_deferred_files(struct cifs_tcon *tcon); 266 267 void cifs_close_all_deferred_files_sb(struct cifs_sb_info *cifs_sb); 268 void cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, 269 struct dentry *dentry); 270 271 void cifs_mark_open_handles_for_deleted_file(struct inode *inode, 272 const char *path); 273 274 struct TCP_Server_Info *cifs_get_tcp_session(struct smb3_fs_context *ctx, 275 struct TCP_Server_Info *primary_server); 276 void cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect); 277 void cifs_put_tcon(struct cifs_tcon *tcon, enum smb3_tcon_ref_trace trace); 278 279 void cifs_release_automount_timer(void); 280 281 void cifs_proc_init(void); 282 void cifs_proc_clean(void); 283 284 void cifs_move_llist(struct list_head *source, struct list_head *dest); 285 void cifs_free_llist(struct list_head *llist); 286 void cifs_del_lock_waiters(struct cifsLockInfo *lock); 287 288 int cifs_tree_connect(const unsigned int xid, struct cifs_tcon *tcon); 289 290 int cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses, 291 struct TCP_Server_Info *server); 292 int cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, 293 struct TCP_Server_Info *server, 294 struct nls_table *nls_info); 295 int cifs_enable_signing(struct TCP_Server_Info *server, 296 bool mnt_sign_required); 297 298 int parse_dfs_referrals(struct get_dfs_referral_rsp *rsp, u32 rsp_size, 299 unsigned int *num_of_nodes, 300 struct dfs_info3_param **target_nodes, 301 const struct nls_table *nls_codepage, int remap, 302 const char *searchName, bool is_unicode); 303 304 struct cifs_ses *sesInfoAlloc(void); 305 void sesInfoFree(struct cifs_ses *buf_to_free); 306 struct cifs_tcon *tcon_info_alloc(bool dir_leases_enabled, 307 enum smb3_tcon_ref_trace trace); 308 void tconInfoFree(struct cifs_tcon *tcon, enum smb3_tcon_ref_trace trace); 309 310 int setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp); 311 void cifs_crypto_secmech_release(struct TCP_Server_Info *server); 312 int calc_seckey(struct cifs_ses *ses); 313 int generate_smb30signingkey(struct cifs_ses *ses, 314 struct TCP_Server_Info *server); 315 int generate_smb311signingkey(struct cifs_ses *ses, 316 struct TCP_Server_Info *server); 317 318 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 319 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ 320 void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb); 321 bool couldbe_mf_symlink(const struct cifs_fattr *fattr); 322 int check_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, 323 struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, 324 const unsigned char *path); 325 int E_md4hash(const unsigned char *passwd, unsigned char *p16, 326 const struct nls_table *codepage); 327 328 struct TCP_Server_Info *cifs_find_tcp_session(struct smb3_fs_context *ctx); 329 330 struct cifs_tcon *cifs_setup_ipc(struct cifs_ses *ses, bool seal); 331 332 void __cifs_put_smb_ses(struct cifs_ses *ses); 333 334 struct cifs_ses *cifs_get_smb_ses(struct TCP_Server_Info *server, 335 struct smb3_fs_context *ctx); 336 337 int cifs_readv_receive(struct TCP_Server_Info *server, 338 struct mid_q_entry *mid); 339 340 int cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, 341 struct cifs_sb_info *cifs_sb, 342 const unsigned char *path, char *pbuf, 343 unsigned int *pbytes_read); 344 int cifs_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, 345 struct cifs_sb_info *cifs_sb, 346 const unsigned char *path, char *pbuf, 347 unsigned int *pbytes_written); 348 int __cifs_calc_signature(struct smb_rqst *rqst, 349 struct TCP_Server_Info *server, char *signature, 350 struct cifs_calc_sig_ctx *ctx); 351 enum securityEnum cifs_select_sectype(struct TCP_Server_Info *server, 352 enum securityEnum requested); 353 354 int cifs_alloc_hash(const char *name, struct shash_desc **sdesc); 355 void cifs_free_hash(struct shash_desc **sdesc); 356 357 int cifs_try_adding_channels(struct cifs_ses *ses); 358 int smb3_update_ses_channels(struct cifs_ses *ses, 359 struct TCP_Server_Info *server, 360 bool from_reconnect, bool disable_mchan); 361 bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface); 362 363 int cifs_ses_get_chan_index(struct cifs_ses *ses, 364 struct TCP_Server_Info *server); 365 void cifs_chan_set_in_reconnect(struct cifs_ses *ses, 366 struct TCP_Server_Info *server); 367 void cifs_chan_clear_in_reconnect(struct cifs_ses *ses, 368 struct TCP_Server_Info *server); 369 void cifs_chan_set_need_reconnect(struct cifs_ses *ses, 370 struct TCP_Server_Info *server); 371 void cifs_chan_clear_need_reconnect(struct cifs_ses *ses, 372 struct TCP_Server_Info *server); 373 bool cifs_chan_needs_reconnect(struct cifs_ses *ses, 374 struct TCP_Server_Info *server); 375 bool cifs_chan_is_iface_active(struct cifs_ses *ses, 376 struct TCP_Server_Info *server); 377 void cifs_decrease_secondary_channels(struct cifs_ses *ses, 378 bool disable_mchan); 379 void cifs_chan_update_iface(struct cifs_ses *ses, 380 struct TCP_Server_Info *server); 381 int SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, 382 bool in_mount); 383 384 void extract_unc_hostname(const char *unc, const char **h, size_t *len); 385 int copy_path_name(char *dst, const char *src); 386 int smb2_parse_query_directory(struct cifs_tcon *tcon, struct kvec *rsp_iov, 387 int resp_buftype, 388 struct cifs_search_info *srch_inf); 389 390 struct super_block *cifs_get_dfs_tcon_super(struct cifs_tcon *tcon); 391 void cifs_put_tcp_super(struct super_block *sb); 392 int cifs_update_super_prepath(struct cifs_sb_info *cifs_sb, char *prefix); 393 char *extract_hostname(const char *unc); 394 char *extract_sharename(const char *unc); 395 int parse_reparse_point(struct reparse_data_buffer *buf, u32 plen, 396 struct cifs_sb_info *cifs_sb, const char *full_path, 397 struct cifs_open_info_data *data); 398 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 399 struct dentry *dentry, struct cifs_tcon *tcon, 400 const char *full_path, umode_t mode, dev_t dev, 401 const char *symname); 402 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 403 struct dentry *dentry, struct cifs_tcon *tcon, 404 const char *full_path, umode_t mode, dev_t dev); 405 umode_t wire_mode_to_posix(u32 wire, bool is_dir); 406 407 #ifdef CONFIG_CIFS_DFS_UPCALL 408 static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses, 409 const char *old_path, 410 const struct nls_table *nls_codepage, 411 struct dfs_info3_param *referral, int remap) 412 { 413 return dfs_cache_find(xid, ses, nls_codepage, remap, old_path, 414 referral, NULL); 415 } 416 417 int match_target_ip(struct TCP_Server_Info *server, const char *host, 418 size_t hostlen, bool *result); 419 int cifs_inval_name_dfs_link_error(const unsigned int xid, 420 struct cifs_tcon *tcon, 421 struct cifs_sb_info *cifs_sb, 422 const char *full_path, bool *islink); 423 #else 424 static inline int cifs_inval_name_dfs_link_error(const unsigned int xid, 425 struct cifs_tcon *tcon, 426 struct cifs_sb_info *cifs_sb, 427 const char *full_path, 428 bool *islink) 429 { 430 *islink = false; 431 return 0; 432 } 433 #endif 434 435 static inline int cifs_create_options(struct cifs_sb_info *cifs_sb, int options) 436 { 437 if (cifs_sb && (backup_cred(cifs_sb))) 438 return options | CREATE_OPEN_BACKUP_INTENT; 439 else 440 return options; 441 } 442 443 int cifs_wait_for_server_reconnect(struct TCP_Server_Info *server, bool retry); 444 445 static inline void cifs_put_smb_ses(struct cifs_ses *ses) 446 { 447 __cifs_put_smb_ses(ses); 448 } 449 450 /* Get an active reference of @ses and its children. 451 * 452 * NOTE: make sure to call this function when incrementing reference count of 453 * @ses to ensure that any DFS root session attached to it (@ses->dfs_root_ses) 454 * will also get its reference count incremented. 455 * 456 * cifs_put_smb_ses() will put all references, so call it when you're done. 457 */ 458 static inline void cifs_smb_ses_inc_refcount(struct cifs_ses *ses) 459 { 460 lockdep_assert_held(&cifs_tcp_ses_lock); 461 ses->ses_count++; 462 } 463 464 static inline bool dfs_src_pathname_equal(const char *s1, const char *s2) 465 { 466 if (strlen(s1) != strlen(s2)) 467 return false; 468 for (; *s1; s1++, s2++) { 469 if (*s1 == '/' || *s1 == '\\') { 470 if (*s2 != '/' && *s2 != '\\') 471 return false; 472 } else if (tolower(*s1) != tolower(*s2)) 473 return false; 474 } 475 return true; 476 } 477 478 static inline void smb_get_mid(struct mid_q_entry *mid) 479 { 480 refcount_inc(&mid->refcount); 481 } 482 483 static inline void release_mid(struct TCP_Server_Info *server, struct mid_q_entry *mid) 484 { 485 if (refcount_dec_and_test(&mid->refcount)) 486 __release_mid(server, mid); 487 } 488 489 static inline void cifs_free_open_info(struct cifs_open_info_data *data) 490 { 491 kfree(data->symlink_target); 492 free_rsp_buf(data->reparse.io.buftype, data->reparse.io.iov.iov_base); 493 memset(data, 0, sizeof(*data)); 494 } 495 496 static inline int smb_EIO(enum smb_eio_trace trace) 497 { 498 trace_smb3_eio(trace, 0, 0); 499 return -EIO; 500 } 501 502 static inline int smb_EIO1(enum smb_eio_trace trace, unsigned long info) 503 { 504 trace_smb3_eio(trace, info, 0); 505 return -EIO; 506 } 507 508 static inline int smb_EIO2(enum smb_eio_trace trace, unsigned long info, unsigned long info2) 509 { 510 trace_smb3_eio(trace, info, info2); 511 return -EIO; 512 } 513 514 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, 515 int num_rqst, 516 const u8 *sig) 517 { 518 unsigned int len, skip; 519 unsigned int nents = 0; 520 unsigned long addr; 521 size_t data_size; 522 int i, j; 523 524 /* 525 * The first rqst has a transform header where the first 20 bytes are 526 * not part of the encrypted blob. 527 */ 528 skip = 20; 529 530 /* Assumes the first rqst has a transform header as the first iov. 531 * I.e. 532 * rqst[0].rq_iov[0] is transform header 533 * rqst[0].rq_iov[1+] data to be encrypted/decrypted 534 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted 535 */ 536 for (i = 0; i < num_rqst; i++) { 537 data_size = iov_iter_count(&rqst[i].rq_iter); 538 539 /* We really don't want a mixture of pinned and unpinned pages 540 * in the sglist. It's hard to keep track of which is what. 541 * Instead, we convert to a BVEC-type iterator higher up. 542 */ 543 if (data_size && 544 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) 545 return smb_EIO(smb_eio_trace_user_iter); 546 547 /* We also don't want to have any extra refs or pins to clean 548 * up in the sglist. 549 */ 550 if (data_size && 551 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) 552 return smb_EIO(smb_eio_trace_extract_will_pin); 553 554 for (j = 0; j < rqst[i].rq_nvec; j++) { 555 struct kvec *iov = &rqst[i].rq_iov[j]; 556 557 addr = (unsigned long)iov->iov_base + skip; 558 if (is_vmalloc_or_module_addr((void *)addr)) { 559 len = iov->iov_len - skip; 560 nents += DIV_ROUND_UP(offset_in_page(addr) + len, 561 PAGE_SIZE); 562 } else { 563 nents++; 564 } 565 skip = 0; 566 } 567 if (data_size) 568 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); 569 } 570 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); 571 return nents; 572 } 573 574 /* We can not use the normal sg_set_buf() as we will sometimes pass a 575 * stack object as buf. 576 */ 577 static inline void cifs_sg_set_buf(struct sg_table *sgtable, 578 const void *buf, 579 unsigned int buflen) 580 { 581 unsigned long addr = (unsigned long)buf; 582 unsigned int off = offset_in_page(addr); 583 584 addr &= PAGE_MASK; 585 if (is_vmalloc_or_module_addr((void *)addr)) { 586 do { 587 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); 588 589 sg_set_page(&sgtable->sgl[sgtable->nents++], 590 vmalloc_to_page((void *)addr), len, off); 591 592 off = 0; 593 addr += PAGE_SIZE; 594 buflen -= len; 595 } while (buflen); 596 } else { 597 sg_set_page(&sgtable->sgl[sgtable->nents++], 598 virt_to_page((void *)addr), buflen, off); 599 } 600 } 601 602 static inline int cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, 603 unsigned int find_flags, 604 struct cifsFileInfo **ret_file) 605 { 606 find_flags &= ~FIND_OPEN_FLAGS; 607 return __cifs_get_writable_file(cifs_inode, find_flags, 0, ret_file); 608 } 609 610 static inline struct cifsFileInfo * 611 find_readable_file(struct cifsInodeInfo *cinode, unsigned int find_flags) 612 { 613 find_flags &= ~FIND_OPEN_FLAGS; 614 find_flags |= FIND_NO_PENDING_DELETE; 615 return __find_readable_file(cinode, find_flags, 0); 616 } 617 618 #endif /* _CIFSPROTO_H */ 619