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 struct fs_context;
23
24 /*
25 *****************************************************************
26 * All Prototypes
27 *****************************************************************
28 */
29
30 void *cifs_buf_get(void);
31 void cifs_buf_release(void *buf_to_free);
32 void *cifs_small_buf_get(void);
33 void cifs_small_buf_release(void *buf_to_free);
34 void free_rsp_buf(int resp_buftype, void *rsp);
35 int smb_send_kvec(struct TCP_Server_Info *server, struct msghdr *smb_msg,
36 size_t *sent);
37 unsigned int _get_xid(void);
38 void _free_xid(unsigned int xid);
39 #define get_xid() \
40 ({ \
41 unsigned int __xid = _get_xid(); \
42 cifs_dbg(FYI, "VFS: in %s as Xid: %u with uid: %d\n", \
43 __func__, __xid, \
44 from_kuid(&init_user_ns, current_fsuid())); \
45 trace_smb3_enter(__xid, __func__); \
46 __xid; \
47 })
48
49 #define free_xid(curr_xid) \
50 do { \
51 _free_xid(curr_xid); \
52 cifs_dbg(FYI, "VFS: leaving %s (xid = %u) rc = %d\n", \
53 __func__, curr_xid, (int)rc); \
54 if (rc) \
55 trace_smb3_exit_err(curr_xid, __func__, (int)rc); \
56 else \
57 trace_smb3_exit_done(curr_xid, __func__); \
58 } while (0)
59 int init_cifs_idmap(void);
60 void exit_cifs_idmap(void);
61 int init_cifs_spnego(void);
62 void exit_cifs_spnego(void);
63 const char *build_path_from_dentry(struct dentry *direntry, void *page);
64 char *__build_path_from_dentry_optional_prefix(struct dentry *direntry,
65 void *page, const char *tree,
66 int tree_len, bool prefix);
67 char *build_path_from_dentry_optional_prefix(struct dentry *direntry,
68 void *page, bool prefix);
alloc_dentry_path(void)69 static inline void *alloc_dentry_path(void)
70 {
71 return __getname();
72 }
73
free_dentry_path(void * page)74 static inline void free_dentry_path(void *page)
75 {
76 if (page)
77 __putname(page);
78 }
79
80 char *cifs_build_path_to_root(struct smb3_fs_context *ctx,
81 struct cifs_sb_info *cifs_sb,
82 struct cifs_tcon *tcon, int add_treename);
83 char *cifs_build_devname(char *nodename, const char *prepath);
84 void delete_mid(struct TCP_Server_Info *server, struct mid_q_entry *mid);
85 void __release_mid(struct TCP_Server_Info *server,
86 struct mid_q_entry *midEntry);
87 void cifs_wake_up_task(struct TCP_Server_Info *server,
88 struct mid_q_entry *mid);
89 int cifs_handle_standard(struct TCP_Server_Info *server,
90 struct mid_q_entry *mid);
91 char *smb3_fs_context_fullpath(const struct smb3_fs_context *ctx, char dirsep);
92 int smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx);
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
send_cancel(struct cifs_ses * ses,struct TCP_Server_Info * server,struct smb_rqst * rqst,struct mid_q_entry * mid,unsigned int xid)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, struct fs_context *fc);
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, const char *reason, int rc);
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_try_adding_channels(struct cifs_ses *ses);
355 int smb3_update_ses_channels(struct cifs_ses *ses,
356 struct TCP_Server_Info *server,
357 bool from_reconnect, bool disable_mchan);
358 bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface);
359
360 int cifs_ses_get_chan_index(struct cifs_ses *ses,
361 struct TCP_Server_Info *server);
362 void cifs_chan_set_in_reconnect(struct cifs_ses *ses,
363 struct TCP_Server_Info *server);
364 void cifs_chan_clear_in_reconnect(struct cifs_ses *ses,
365 struct TCP_Server_Info *server);
366 void cifs_chan_set_need_reconnect(struct cifs_ses *ses,
367 struct TCP_Server_Info *server);
368 void cifs_chan_clear_need_reconnect(struct cifs_ses *ses,
369 struct TCP_Server_Info *server);
370 bool cifs_chan_needs_reconnect(struct cifs_ses *ses,
371 struct TCP_Server_Info *server);
372 bool cifs_chan_is_iface_active(struct cifs_ses *ses,
373 struct TCP_Server_Info *server);
374 void cifs_decrease_secondary_channels(struct cifs_ses *ses,
375 bool disable_mchan);
376 void cifs_chan_update_iface(struct cifs_ses *ses,
377 struct TCP_Server_Info *server);
378 int SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon,
379 bool in_mount);
380
381 void extract_unc_hostname(const char *unc, const char **h, size_t *len);
382 int copy_path_name(char *dst, const char *src);
383 int smb2_parse_query_directory(struct cifs_tcon *tcon, struct kvec *rsp_iov,
384 int resp_buftype,
385 struct cifs_search_info *srch_inf);
386
387 struct super_block *cifs_get_dfs_tcon_super(struct cifs_tcon *tcon);
388 void cifs_put_tcp_super(struct super_block *sb);
389 int cifs_update_super_prepath(struct cifs_sb_info *cifs_sb, char *prefix);
390 char *extract_hostname(const char *unc);
391 char *extract_sharename(const char *unc);
392 int parse_reparse_point(struct reparse_data_buffer *buf, u32 plen,
393 struct cifs_sb_info *cifs_sb, const char *full_path,
394 struct cifs_open_info_data *data);
395 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
396 struct dentry *dentry, struct cifs_tcon *tcon,
397 const char *full_path, umode_t mode, dev_t dev,
398 const char *symname);
399 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
400 struct dentry *dentry, struct cifs_tcon *tcon,
401 const char *full_path, umode_t mode, dev_t dev);
402 umode_t wire_mode_to_posix(u32 wire, bool is_dir);
403
404 #ifdef CONFIG_CIFS_DFS_UPCALL
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)405 static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses,
406 const char *old_path,
407 const struct nls_table *nls_codepage,
408 struct dfs_info3_param *referral, int remap)
409 {
410 return dfs_cache_find(xid, ses, nls_codepage, remap, old_path,
411 referral, NULL);
412 }
413
414 int match_target_ip(struct TCP_Server_Info *server, const char *host,
415 size_t hostlen, bool *result);
416 int cifs_inval_name_dfs_link_error(const unsigned int xid,
417 struct cifs_tcon *tcon,
418 struct cifs_sb_info *cifs_sb,
419 const char *full_path, bool *islink);
420 #else
cifs_inval_name_dfs_link_error(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,bool * islink)421 static inline int cifs_inval_name_dfs_link_error(const unsigned int xid,
422 struct cifs_tcon *tcon,
423 struct cifs_sb_info *cifs_sb,
424 const char *full_path,
425 bool *islink)
426 {
427 *islink = false;
428 return 0;
429 }
430 #endif
431
cifs_create_options(struct cifs_sb_info * cifs_sb,int options)432 static inline int cifs_create_options(struct cifs_sb_info *cifs_sb, int options)
433 {
434 if (cifs_sb && (backup_cred(cifs_sb)))
435 return options | CREATE_OPEN_BACKUP_INTENT;
436 else
437 return options;
438 }
439
440 int cifs_wait_for_server_reconnect(struct TCP_Server_Info *server, bool retry);
441
cifs_put_smb_ses(struct cifs_ses * ses)442 static inline void cifs_put_smb_ses(struct cifs_ses *ses)
443 {
444 __cifs_put_smb_ses(ses);
445 }
446
447 /* Get an active reference of @ses and its children.
448 *
449 * NOTE: make sure to call this function when incrementing reference count of
450 * @ses to ensure that any DFS root session attached to it (@ses->dfs_root_ses)
451 * will also get its reference count incremented.
452 *
453 * cifs_put_smb_ses() will put all references, so call it when you're done.
454 */
cifs_smb_ses_inc_refcount(struct cifs_ses * ses)455 static inline void cifs_smb_ses_inc_refcount(struct cifs_ses *ses)
456 {
457 lockdep_assert_held(&cifs_tcp_ses_lock);
458 ses->ses_count++;
459 }
460
dfs_src_pathname_equal(const char * s1,const char * s2)461 static inline bool dfs_src_pathname_equal(const char *s1, const char *s2)
462 {
463 if (strlen(s1) != strlen(s2))
464 return false;
465 for (; *s1; s1++, s2++) {
466 if (*s1 == '/' || *s1 == '\\') {
467 if (*s2 != '/' && *s2 != '\\')
468 return false;
469 } else if (tolower(*s1) != tolower(*s2))
470 return false;
471 }
472 return true;
473 }
474
smb_get_mid(struct mid_q_entry * mid)475 static inline void smb_get_mid(struct mid_q_entry *mid)
476 {
477 refcount_inc(&mid->refcount);
478 }
479
release_mid(struct TCP_Server_Info * server,struct mid_q_entry * mid)480 static inline void release_mid(struct TCP_Server_Info *server, struct mid_q_entry *mid)
481 {
482 if (refcount_dec_and_test(&mid->refcount))
483 __release_mid(server, mid);
484 }
485
cifs_free_open_info(struct cifs_open_info_data * data)486 static inline void cifs_free_open_info(struct cifs_open_info_data *data)
487 {
488 kfree(data->symlink_target);
489 free_rsp_buf(data->reparse.io.buftype, data->reparse.io.iov.iov_base);
490 memset(data, 0, sizeof(*data));
491 }
492
smb_EIO(enum smb_eio_trace trace)493 static inline int smb_EIO(enum smb_eio_trace trace)
494 {
495 trace_smb3_eio(trace, 0, 0);
496 return -EIO;
497 }
498
smb_EIO1(enum smb_eio_trace trace,unsigned long info)499 static inline int smb_EIO1(enum smb_eio_trace trace, unsigned long info)
500 {
501 trace_smb3_eio(trace, info, 0);
502 return -EIO;
503 }
504
smb_EIO2(enum smb_eio_trace trace,unsigned long info,unsigned long info2)505 static inline int smb_EIO2(enum smb_eio_trace trace, unsigned long info, unsigned long info2)
506 {
507 trace_smb3_eio(trace, info, info2);
508 return -EIO;
509 }
510
cifs_get_num_sgs(const struct smb_rqst * rqst,int num_rqst,const u8 * sig)511 static inline int cifs_get_num_sgs(const struct smb_rqst *rqst,
512 int num_rqst,
513 const u8 *sig)
514 {
515 unsigned int len, skip;
516 unsigned int nents = 0;
517 unsigned long addr;
518 size_t data_size;
519 int i, j;
520
521 /*
522 * The first rqst has a transform header where the first 20 bytes are
523 * not part of the encrypted blob.
524 */
525 skip = 20;
526
527 /* Assumes the first rqst has a transform header as the first iov.
528 * I.e.
529 * rqst[0].rq_iov[0] is transform header
530 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
531 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
532 */
533 for (i = 0; i < num_rqst; i++) {
534 data_size = iov_iter_count(&rqst[i].rq_iter);
535
536 /* We really don't want a mixture of pinned and unpinned pages
537 * in the sglist. It's hard to keep track of which is what.
538 * Instead, we convert to a BVEC-type iterator higher up.
539 */
540 if (data_size &&
541 WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter)))
542 return smb_EIO(smb_eio_trace_user_iter);
543
544 /* We also don't want to have any extra refs or pins to clean
545 * up in the sglist.
546 */
547 if (data_size &&
548 WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter)))
549 return smb_EIO(smb_eio_trace_extract_will_pin);
550
551 for (j = 0; j < rqst[i].rq_nvec; j++) {
552 struct kvec *iov = &rqst[i].rq_iov[j];
553
554 addr = (unsigned long)iov->iov_base + skip;
555 if (is_vmalloc_or_module_addr((void *)addr)) {
556 len = iov->iov_len - skip;
557 nents += DIV_ROUND_UP(offset_in_page(addr) + len,
558 PAGE_SIZE);
559 } else {
560 nents++;
561 }
562 skip = 0;
563 }
564 if (data_size)
565 nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX);
566 }
567 nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE);
568 return nents;
569 }
570
571 /* We can not use the normal sg_set_buf() as we will sometimes pass a
572 * stack object as buf.
573 */
cifs_sg_set_buf(struct sg_table * sgtable,const void * buf,unsigned int buflen)574 static inline void cifs_sg_set_buf(struct sg_table *sgtable,
575 const void *buf,
576 unsigned int buflen)
577 {
578 unsigned long addr = (unsigned long)buf;
579 unsigned int off = offset_in_page(addr);
580
581 addr &= PAGE_MASK;
582 if (is_vmalloc_or_module_addr((void *)addr)) {
583 do {
584 unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off);
585
586 sg_set_page(&sgtable->sgl[sgtable->nents++],
587 vmalloc_to_page((void *)addr), len, off);
588
589 off = 0;
590 addr += PAGE_SIZE;
591 buflen -= len;
592 } while (buflen);
593 } else {
594 sg_set_page(&sgtable->sgl[sgtable->nents++],
595 virt_to_page((void *)addr), buflen, off);
596 }
597 }
598
cifs_get_writable_file(struct cifsInodeInfo * cifs_inode,unsigned int find_flags,struct cifsFileInfo ** ret_file)599 static inline int cifs_get_writable_file(struct cifsInodeInfo *cifs_inode,
600 unsigned int find_flags,
601 struct cifsFileInfo **ret_file)
602 {
603 find_flags &= ~FIND_OPEN_FLAGS;
604 return __cifs_get_writable_file(cifs_inode, find_flags, 0, ret_file);
605 }
606
607 static inline struct cifsFileInfo *
find_readable_file(struct cifsInodeInfo * cinode,unsigned int find_flags)608 find_readable_file(struct cifsInodeInfo *cinode, unsigned int find_flags)
609 {
610 find_flags &= ~FIND_OPEN_FLAGS;
611 find_flags |= FIND_NO_PENDING_DELETE;
612 return __find_readable_file(cinode, find_flags, 0);
613 }
614
615 #endif /* _CIFSPROTO_H */
616