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TOMOYO Linux Cross Reference
Linux/fs/cifs/smb2ops.c

Version: ~ [ linux-5.6-rc1 ] ~ [ linux-5.5.2 ] ~ [ linux-5.4.17 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.102 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.170 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.213 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.213 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.81 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *  SMB2 version specific operations
  3  *
  4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
  5  *
  6  *  This library is free software; you can redistribute it and/or modify
  7  *  it under the terms of the GNU General Public License v2 as published
  8  *  by the Free Software Foundation.
  9  *
 10  *  This library is distributed in the hope that it will be useful,
 11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 13  *  the GNU Lesser General Public License for more details.
 14  *
 15  *  You should have received a copy of the GNU Lesser General Public License
 16  *  along with this library; if not, write to the Free Software
 17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 18  */
 19 
 20 #include <linux/pagemap.h>
 21 #include <linux/vfs.h>
 22 #include <linux/falloc.h>
 23 #include "cifsglob.h"
 24 #include "smb2pdu.h"
 25 #include "smb2proto.h"
 26 #include "cifsproto.h"
 27 #include "cifs_debug.h"
 28 #include "cifs_unicode.h"
 29 #include "smb2status.h"
 30 #include "smb2glob.h"
 31 
 32 static int
 33 change_conf(struct TCP_Server_Info *server)
 34 {
 35         server->credits += server->echo_credits + server->oplock_credits;
 36         server->oplock_credits = server->echo_credits = 0;
 37         switch (server->credits) {
 38         case 0:
 39                 return -1;
 40         case 1:
 41                 server->echoes = false;
 42                 server->oplocks = false;
 43                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
 44                 break;
 45         case 2:
 46                 server->echoes = true;
 47                 server->oplocks = false;
 48                 server->echo_credits = 1;
 49                 cifs_dbg(FYI, "disabling oplocks\n");
 50                 break;
 51         default:
 52                 server->echoes = true;
 53                 if (enable_oplocks) {
 54                         server->oplocks = true;
 55                         server->oplock_credits = 1;
 56                 } else
 57                         server->oplocks = false;
 58 
 59                 server->echo_credits = 1;
 60         }
 61         server->credits -= server->echo_credits + server->oplock_credits;
 62         return 0;
 63 }
 64 
 65 static void
 66 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
 67                  const int optype)
 68 {
 69         int *val, rc = 0;
 70         spin_lock(&server->req_lock);
 71         val = server->ops->get_credits_field(server, optype);
 72         *val += add;
 73         server->in_flight--;
 74         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
 75                 rc = change_conf(server);
 76         /*
 77          * Sometimes server returns 0 credits on oplock break ack - we need to
 78          * rebalance credits in this case.
 79          */
 80         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 81                  server->oplocks) {
 82                 if (server->credits > 1) {
 83                         server->credits--;
 84                         server->oplock_credits++;
 85                 }
 86         }
 87         spin_unlock(&server->req_lock);
 88         wake_up(&server->request_q);
 89         if (rc)
 90                 cifs_reconnect(server);
 91 }
 92 
 93 static void
 94 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 95 {
 96         spin_lock(&server->req_lock);
 97         server->credits = val;
 98         spin_unlock(&server->req_lock);
 99 }
100 
101 static int *
102 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
103 {
104         switch (optype) {
105         case CIFS_ECHO_OP:
106                 return &server->echo_credits;
107         case CIFS_OBREAK_OP:
108                 return &server->oplock_credits;
109         default:
110                 return &server->credits;
111         }
112 }
113 
114 static unsigned int
115 smb2_get_credits(struct mid_q_entry *mid)
116 {
117         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
118 }
119 
120 static int
121 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
122                       unsigned int *num, unsigned int *credits)
123 {
124         int rc = 0;
125         unsigned int scredits;
126 
127         spin_lock(&server->req_lock);
128         while (1) {
129                 if (server->credits <= 0) {
130                         spin_unlock(&server->req_lock);
131                         cifs_num_waiters_inc(server);
132                         rc = wait_event_killable(server->request_q,
133                                         has_credits(server, &server->credits));
134                         cifs_num_waiters_dec(server);
135                         if (rc)
136                                 return rc;
137                         spin_lock(&server->req_lock);
138                 } else {
139                         if (server->tcpStatus == CifsExiting) {
140                                 spin_unlock(&server->req_lock);
141                                 return -ENOENT;
142                         }
143 
144                         scredits = server->credits;
145                         /* can deadlock with reopen */
146                         if (scredits == 1) {
147                                 *num = SMB2_MAX_BUFFER_SIZE;
148                                 *credits = 0;
149                                 break;
150                         }
151 
152                         /* leave one credit for a possible reopen */
153                         scredits--;
154                         *num = min_t(unsigned int, size,
155                                      scredits * SMB2_MAX_BUFFER_SIZE);
156 
157                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
158                         server->credits -= *credits;
159                         server->in_flight++;
160                         break;
161                 }
162         }
163         spin_unlock(&server->req_lock);
164         return rc;
165 }
166 
167 static __u64
168 smb2_get_next_mid(struct TCP_Server_Info *server)
169 {
170         __u64 mid;
171         /* for SMB2 we need the current value */
172         spin_lock(&GlobalMid_Lock);
173         mid = server->CurrentMid++;
174         spin_unlock(&GlobalMid_Lock);
175         return mid;
176 }
177 
178 static struct mid_q_entry *
179 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
180 {
181         struct mid_q_entry *mid;
182         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
183         __u64 wire_mid = le64_to_cpu(hdr->MessageId);
184 
185         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
186                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
187                 return NULL;
188         }
189 
190         spin_lock(&GlobalMid_Lock);
191         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
192                 if ((mid->mid == wire_mid) &&
193                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
194                     (mid->command == hdr->Command)) {
195                         spin_unlock(&GlobalMid_Lock);
196                         return mid;
197                 }
198         }
199         spin_unlock(&GlobalMid_Lock);
200         return NULL;
201 }
202 
203 static void
204 smb2_dump_detail(void *buf)
205 {
206 #ifdef CONFIG_CIFS_DEBUG2
207         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
208 
209         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
210                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
211                  smb->ProcessId);
212         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
213 #endif
214 }
215 
216 static bool
217 smb2_need_neg(struct TCP_Server_Info *server)
218 {
219         return server->max_read == 0;
220 }
221 
222 static int
223 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
224 {
225         int rc;
226         ses->server->CurrentMid = 0;
227         rc = SMB2_negotiate(xid, ses);
228         /* BB we probably don't need to retry with modern servers */
229         if (rc == -EAGAIN)
230                 rc = -EHOSTDOWN;
231         return rc;
232 }
233 
234 static unsigned int
235 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
236 {
237         struct TCP_Server_Info *server = tcon->ses->server;
238         unsigned int wsize;
239 
240         /* start with specified wsize, or default */
241         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
242         wsize = min_t(unsigned int, wsize, server->max_write);
243 
244         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
245                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
246 
247         return wsize;
248 }
249 
250 static unsigned int
251 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
252 {
253         struct TCP_Server_Info *server = tcon->ses->server;
254         unsigned int rsize;
255 
256         /* start with specified rsize, or default */
257         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
258         rsize = min_t(unsigned int, rsize, server->max_read);
259 
260         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
261                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
262 
263         return rsize;
264 }
265 
266 #ifdef CONFIG_CIFS_STATS2
267 static int
268 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
269 {
270         int rc;
271         unsigned int ret_data_len = 0;
272         struct network_interface_info_ioctl_rsp *out_buf;
273 
274         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
275                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
276                         NULL /* no data input */, 0 /* no data input */,
277                         (char **)&out_buf, &ret_data_len);
278         if (rc != 0)
279                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
280         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
281                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
282                 rc = -EINVAL;
283         } else {
284                 /* Dump info on first interface */
285                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
286                         le32_to_cpu(out_buf->Capability));
287                 cifs_dbg(FYI, "Link Speed %lld\n",
288                         le64_to_cpu(out_buf->LinkSpeed));
289         }
290 
291         return rc;
292 }
293 #endif /* STATS2 */
294 
295 static void
296 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
297 {
298         int rc;
299         __le16 srch_path = 0; /* Null - open root of share */
300         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
301         struct cifs_open_parms oparms;
302         struct cifs_fid fid;
303 
304         oparms.tcon = tcon;
305         oparms.desired_access = FILE_READ_ATTRIBUTES;
306         oparms.disposition = FILE_OPEN;
307         oparms.create_options = 0;
308         oparms.fid = &fid;
309         oparms.reconnect = false;
310 
311         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
312         if (rc)
313                 return;
314 
315 #ifdef CONFIG_CIFS_STATS2
316         SMB3_request_interfaces(xid, tcon);
317 #endif /* STATS2 */
318 
319         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
320                         FS_ATTRIBUTE_INFORMATION);
321         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
322                         FS_DEVICE_INFORMATION);
323         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
324                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
325         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
326         return;
327 }
328 
329 static void
330 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
331 {
332         int rc;
333         __le16 srch_path = 0; /* Null - open root of share */
334         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
335         struct cifs_open_parms oparms;
336         struct cifs_fid fid;
337 
338         oparms.tcon = tcon;
339         oparms.desired_access = FILE_READ_ATTRIBUTES;
340         oparms.disposition = FILE_OPEN;
341         oparms.create_options = 0;
342         oparms.fid = &fid;
343         oparms.reconnect = false;
344 
345         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
346         if (rc)
347                 return;
348 
349         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
350                         FS_ATTRIBUTE_INFORMATION);
351         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
352                         FS_DEVICE_INFORMATION);
353         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
354         return;
355 }
356 
357 static int
358 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
359                         struct cifs_sb_info *cifs_sb, const char *full_path)
360 {
361         int rc;
362         __le16 *utf16_path;
363         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
364         struct cifs_open_parms oparms;
365         struct cifs_fid fid;
366 
367         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
368         if (!utf16_path)
369                 return -ENOMEM;
370 
371         oparms.tcon = tcon;
372         oparms.desired_access = FILE_READ_ATTRIBUTES;
373         oparms.disposition = FILE_OPEN;
374         oparms.create_options = 0;
375         oparms.fid = &fid;
376         oparms.reconnect = false;
377 
378         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
379         if (rc) {
380                 kfree(utf16_path);
381                 return rc;
382         }
383 
384         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
385         kfree(utf16_path);
386         return rc;
387 }
388 
389 static int
390 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
391                   struct cifs_sb_info *cifs_sb, const char *full_path,
392                   u64 *uniqueid, FILE_ALL_INFO *data)
393 {
394         *uniqueid = le64_to_cpu(data->IndexNumber);
395         return 0;
396 }
397 
398 static int
399 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
400                      struct cifs_fid *fid, FILE_ALL_INFO *data)
401 {
402         int rc;
403         struct smb2_file_all_info *smb2_data;
404 
405         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
406                             GFP_KERNEL);
407         if (smb2_data == NULL)
408                 return -ENOMEM;
409 
410         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
411                              smb2_data);
412         if (!rc)
413                 move_smb2_info_to_cifs(data, smb2_data);
414         kfree(smb2_data);
415         return rc;
416 }
417 
418 static bool
419 smb2_can_echo(struct TCP_Server_Info *server)
420 {
421         return server->echoes;
422 }
423 
424 static void
425 smb2_clear_stats(struct cifs_tcon *tcon)
426 {
427 #ifdef CONFIG_CIFS_STATS
428         int i;
429         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
430                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
431                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
432         }
433 #endif
434 }
435 
436 static void
437 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
438 {
439         seq_puts(m, "\n\tShare Capabilities:");
440         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
441                 seq_puts(m, " DFS,");
442         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
443                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
444         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
445                 seq_puts(m, " SCALEOUT,");
446         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
447                 seq_puts(m, " CLUSTER,");
448         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
449                 seq_puts(m, " ASYMMETRIC,");
450         if (tcon->capabilities == 0)
451                 seq_puts(m, " None");
452         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
453                 seq_puts(m, " Aligned,");
454         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
455                 seq_puts(m, " Partition Aligned,");
456         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
457                 seq_puts(m, " SSD,");
458         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
459                 seq_puts(m, " TRIM-support,");
460 
461         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
462         if (tcon->perf_sector_size)
463                 seq_printf(m, "\tOptimal sector size: 0x%x",
464                            tcon->perf_sector_size);
465 }
466 
467 static void
468 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
469 {
470 #ifdef CONFIG_CIFS_STATS
471         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
472         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
473         seq_printf(m, "\nNegotiates: %d sent %d failed",
474                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
475                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
476         seq_printf(m, "\nSessionSetups: %d sent %d failed",
477                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
478                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
479         seq_printf(m, "\nLogoffs: %d sent %d failed",
480                    atomic_read(&sent[SMB2_LOGOFF_HE]),
481                    atomic_read(&failed[SMB2_LOGOFF_HE]));
482         seq_printf(m, "\nTreeConnects: %d sent %d failed",
483                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
484                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
485         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
486                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
487                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
488         seq_printf(m, "\nCreates: %d sent %d failed",
489                    atomic_read(&sent[SMB2_CREATE_HE]),
490                    atomic_read(&failed[SMB2_CREATE_HE]));
491         seq_printf(m, "\nCloses: %d sent %d failed",
492                    atomic_read(&sent[SMB2_CLOSE_HE]),
493                    atomic_read(&failed[SMB2_CLOSE_HE]));
494         seq_printf(m, "\nFlushes: %d sent %d failed",
495                    atomic_read(&sent[SMB2_FLUSH_HE]),
496                    atomic_read(&failed[SMB2_FLUSH_HE]));
497         seq_printf(m, "\nReads: %d sent %d failed",
498                    atomic_read(&sent[SMB2_READ_HE]),
499                    atomic_read(&failed[SMB2_READ_HE]));
500         seq_printf(m, "\nWrites: %d sent %d failed",
501                    atomic_read(&sent[SMB2_WRITE_HE]),
502                    atomic_read(&failed[SMB2_WRITE_HE]));
503         seq_printf(m, "\nLocks: %d sent %d failed",
504                    atomic_read(&sent[SMB2_LOCK_HE]),
505                    atomic_read(&failed[SMB2_LOCK_HE]));
506         seq_printf(m, "\nIOCTLs: %d sent %d failed",
507                    atomic_read(&sent[SMB2_IOCTL_HE]),
508                    atomic_read(&failed[SMB2_IOCTL_HE]));
509         seq_printf(m, "\nCancels: %d sent %d failed",
510                    atomic_read(&sent[SMB2_CANCEL_HE]),
511                    atomic_read(&failed[SMB2_CANCEL_HE]));
512         seq_printf(m, "\nEchos: %d sent %d failed",
513                    atomic_read(&sent[SMB2_ECHO_HE]),
514                    atomic_read(&failed[SMB2_ECHO_HE]));
515         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
516                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
517                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
518         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
519                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
520                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
521         seq_printf(m, "\nQueryInfos: %d sent %d failed",
522                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
523                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
524         seq_printf(m, "\nSetInfos: %d sent %d failed",
525                    atomic_read(&sent[SMB2_SET_INFO_HE]),
526                    atomic_read(&failed[SMB2_SET_INFO_HE]));
527         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
528                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
529                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
530 #endif
531 }
532 
533 static void
534 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
535 {
536         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
537         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
538 
539         cfile->fid.persistent_fid = fid->persistent_fid;
540         cfile->fid.volatile_fid = fid->volatile_fid;
541         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
542                                       &fid->purge_cache);
543         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
544 }
545 
546 static void
547 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
548                 struct cifs_fid *fid)
549 {
550         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
551 }
552 
553 static int
554 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
555                      u64 persistent_fid, u64 volatile_fid,
556                      struct copychunk_ioctl *pcchunk)
557 {
558         int rc;
559         unsigned int ret_data_len;
560         struct resume_key_req *res_key;
561 
562         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
563                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
564                         NULL, 0 /* no input */,
565                         (char **)&res_key, &ret_data_len);
566 
567         if (rc) {
568                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
569                 goto req_res_key_exit;
570         }
571         if (ret_data_len < sizeof(struct resume_key_req)) {
572                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
573                 rc = -EINVAL;
574                 goto req_res_key_exit;
575         }
576         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
577 
578 req_res_key_exit:
579         kfree(res_key);
580         return rc;
581 }
582 
583 static int
584 smb2_clone_range(const unsigned int xid,
585                         struct cifsFileInfo *srcfile,
586                         struct cifsFileInfo *trgtfile, u64 src_off,
587                         u64 len, u64 dest_off)
588 {
589         int rc;
590         unsigned int ret_data_len;
591         struct copychunk_ioctl *pcchunk;
592         struct copychunk_ioctl_rsp *retbuf = NULL;
593         struct cifs_tcon *tcon;
594         int chunks_copied = 0;
595         bool chunk_sizes_updated = false;
596 
597         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
598 
599         if (pcchunk == NULL)
600                 return -ENOMEM;
601 
602         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
603         /* Request a key from the server to identify the source of the copy */
604         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
605                                 srcfile->fid.persistent_fid,
606                                 srcfile->fid.volatile_fid, pcchunk);
607 
608         /* Note: request_res_key sets res_key null only if rc !=0 */
609         if (rc)
610                 goto cchunk_out;
611 
612         /* For now array only one chunk long, will make more flexible later */
613         pcchunk->ChunkCount = cpu_to_le32(1);
614         pcchunk->Reserved = 0;
615         pcchunk->Reserved2 = 0;
616 
617         tcon = tlink_tcon(trgtfile->tlink);
618 
619         while (len > 0) {
620                 pcchunk->SourceOffset = cpu_to_le64(src_off);
621                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
622                 pcchunk->Length =
623                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
624 
625                 /* Request server copy to target from src identified by key */
626                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
627                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
628                         true /* is_fsctl */, (char *)pcchunk,
629                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
630                         &ret_data_len);
631                 if (rc == 0) {
632                         if (ret_data_len !=
633                                         sizeof(struct copychunk_ioctl_rsp)) {
634                                 cifs_dbg(VFS, "invalid cchunk response size\n");
635                                 rc = -EIO;
636                                 goto cchunk_out;
637                         }
638                         if (retbuf->TotalBytesWritten == 0) {
639                                 cifs_dbg(FYI, "no bytes copied\n");
640                                 rc = -EIO;
641                                 goto cchunk_out;
642                         }
643                         /*
644                          * Check if server claimed to write more than we asked
645                          */
646                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
647                             le32_to_cpu(pcchunk->Length)) {
648                                 cifs_dbg(VFS, "invalid copy chunk response\n");
649                                 rc = -EIO;
650                                 goto cchunk_out;
651                         }
652                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
653                                 cifs_dbg(VFS, "invalid num chunks written\n");
654                                 rc = -EIO;
655                                 goto cchunk_out;
656                         }
657                         chunks_copied++;
658 
659                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
660                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
661                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
662 
663                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
664                                 le32_to_cpu(retbuf->ChunksWritten),
665                                 le32_to_cpu(retbuf->ChunkBytesWritten),
666                                 le32_to_cpu(retbuf->TotalBytesWritten));
667                 } else if (rc == -EINVAL) {
668                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
669                                 goto cchunk_out;
670 
671                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
672                                 le32_to_cpu(retbuf->ChunksWritten),
673                                 le32_to_cpu(retbuf->ChunkBytesWritten),
674                                 le32_to_cpu(retbuf->TotalBytesWritten));
675 
676                         /*
677                          * Check if this is the first request using these sizes,
678                          * (ie check if copy succeed once with original sizes
679                          * and check if the server gave us different sizes after
680                          * we already updated max sizes on previous request).
681                          * if not then why is the server returning an error now
682                          */
683                         if ((chunks_copied != 0) || chunk_sizes_updated)
684                                 goto cchunk_out;
685 
686                         /* Check that server is not asking us to grow size */
687                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
688                                         tcon->max_bytes_chunk)
689                                 tcon->max_bytes_chunk =
690                                         le32_to_cpu(retbuf->ChunkBytesWritten);
691                         else
692                                 goto cchunk_out; /* server gave us bogus size */
693 
694                         /* No need to change MaxChunks since already set to 1 */
695                         chunk_sizes_updated = true;
696                 } else
697                         goto cchunk_out;
698         }
699 
700 cchunk_out:
701         kfree(pcchunk);
702         return rc;
703 }
704 
705 static int
706 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
707                 struct cifs_fid *fid)
708 {
709         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
710 }
711 
712 static unsigned int
713 smb2_read_data_offset(char *buf)
714 {
715         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
716         return rsp->DataOffset;
717 }
718 
719 static unsigned int
720 smb2_read_data_length(char *buf)
721 {
722         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
723         return le32_to_cpu(rsp->DataLength);
724 }
725 
726 
727 static int
728 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
729                struct cifs_io_parms *parms, unsigned int *bytes_read,
730                char **buf, int *buf_type)
731 {
732         parms->persistent_fid = pfid->persistent_fid;
733         parms->volatile_fid = pfid->volatile_fid;
734         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
735 }
736 
737 static int
738 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
739                 struct cifs_io_parms *parms, unsigned int *written,
740                 struct kvec *iov, unsigned long nr_segs)
741 {
742 
743         parms->persistent_fid = pfid->persistent_fid;
744         parms->volatile_fid = pfid->volatile_fid;
745         return SMB2_write(xid, parms, written, iov, nr_segs);
746 }
747 
748 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
749 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
750                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
751 {
752         struct cifsInodeInfo *cifsi;
753         int rc;
754 
755         cifsi = CIFS_I(inode);
756 
757         /* if file already sparse don't bother setting sparse again */
758         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
759                 return true; /* already sparse */
760 
761         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
762                 return true; /* already not sparse */
763 
764         /*
765          * Can't check for sparse support on share the usual way via the
766          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
767          * since Samba server doesn't set the flag on the share, yet
768          * supports the set sparse FSCTL and returns sparse correctly
769          * in the file attributes. If we fail setting sparse though we
770          * mark that server does not support sparse files for this share
771          * to avoid repeatedly sending the unsupported fsctl to server
772          * if the file is repeatedly extended.
773          */
774         if (tcon->broken_sparse_sup)
775                 return false;
776 
777         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
778                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
779                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
780         if (rc) {
781                 tcon->broken_sparse_sup = true;
782                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
783                 return false;
784         }
785 
786         if (setsparse)
787                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
788         else
789                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
790 
791         return true;
792 }
793 
794 static int
795 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
796                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
797 {
798         __le64 eof = cpu_to_le64(size);
799         struct inode *inode;
800 
801         /*
802          * If extending file more than one page make sparse. Many Linux fs
803          * make files sparse by default when extending via ftruncate
804          */
805         inode = d_inode(cfile->dentry);
806 
807         if (!set_alloc && (size > inode->i_size + 8192)) {
808                 __u8 set_sparse = 1;
809 
810                 /* whether set sparse succeeds or not, extend the file */
811                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
812         }
813 
814         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
815                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
816 }
817 
818 static int
819 smb2_duplicate_extents(const unsigned int xid,
820                         struct cifsFileInfo *srcfile,
821                         struct cifsFileInfo *trgtfile, u64 src_off,
822                         u64 len, u64 dest_off)
823 {
824         int rc;
825         unsigned int ret_data_len;
826         char *retbuf = NULL;
827         struct duplicate_extents_to_file dup_ext_buf;
828         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
829 
830         /* server fileays advertise duplicate extent support with this flag */
831         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
832              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
833                 return -EOPNOTSUPP;
834 
835         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
836         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
837         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
838         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
839         dup_ext_buf.ByteCount = cpu_to_le64(len);
840         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
841                 src_off, dest_off, len);
842 
843         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
844         if (rc)
845                 goto duplicate_extents_out;
846 
847         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
848                         trgtfile->fid.volatile_fid,
849                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
850                         true /* is_fsctl */, (char *)&dup_ext_buf,
851                         sizeof(struct duplicate_extents_to_file),
852                         (char **)&retbuf,
853                         &ret_data_len);
854 
855         if (ret_data_len > 0)
856                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
857 
858 duplicate_extents_out:
859         return rc;
860 }
861 
862 static int
863 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
864                    struct cifsFileInfo *cfile)
865 {
866         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
867                             cfile->fid.volatile_fid);
868 }
869 
870 static int
871 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
872                    struct cifsFileInfo *cfile)
873 {
874         struct fsctl_set_integrity_information_req integr_info;
875         char *retbuf = NULL;
876         unsigned int ret_data_len;
877 
878         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
879         integr_info.Flags = 0;
880         integr_info.Reserved = 0;
881 
882         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
883                         cfile->fid.volatile_fid,
884                         FSCTL_SET_INTEGRITY_INFORMATION,
885                         true /* is_fsctl */, (char *)&integr_info,
886                         sizeof(struct fsctl_set_integrity_information_req),
887                         (char **)&retbuf,
888                         &ret_data_len);
889 
890 }
891 
892 static int
893 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
894                      const char *path, struct cifs_sb_info *cifs_sb,
895                      struct cifs_fid *fid, __u16 search_flags,
896                      struct cifs_search_info *srch_inf)
897 {
898         __le16 *utf16_path;
899         int rc;
900         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
901         struct cifs_open_parms oparms;
902 
903         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
904         if (!utf16_path)
905                 return -ENOMEM;
906 
907         oparms.tcon = tcon;
908         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
909         oparms.disposition = FILE_OPEN;
910         oparms.create_options = 0;
911         oparms.fid = fid;
912         oparms.reconnect = false;
913 
914         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
915         kfree(utf16_path);
916         if (rc) {
917                 cifs_dbg(VFS, "open dir failed\n");
918                 return rc;
919         }
920 
921         srch_inf->entries_in_buffer = 0;
922         srch_inf->index_of_last_entry = 0;
923 
924         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
925                                   fid->volatile_fid, 0, srch_inf);
926         if (rc) {
927                 cifs_dbg(VFS, "query directory failed\n");
928                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
929         }
930         return rc;
931 }
932 
933 static int
934 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
935                     struct cifs_fid *fid, __u16 search_flags,
936                     struct cifs_search_info *srch_inf)
937 {
938         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
939                                     fid->volatile_fid, 0, srch_inf);
940 }
941 
942 static int
943 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
944                struct cifs_fid *fid)
945 {
946         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
947 }
948 
949 /*
950 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
951 * the number of credits and return true. Otherwise - return false.
952 */
953 static bool
954 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
955 {
956         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
957 
958         if (hdr->Status != STATUS_PENDING)
959                 return false;
960 
961         if (!length) {
962                 spin_lock(&server->req_lock);
963                 server->credits += le16_to_cpu(hdr->CreditRequest);
964                 spin_unlock(&server->req_lock);
965                 wake_up(&server->request_q);
966         }
967 
968         return true;
969 }
970 
971 static int
972 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
973                      struct cifsInodeInfo *cinode)
974 {
975         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
976                 return SMB2_lease_break(0, tcon, cinode->lease_key,
977                                         smb2_get_lease_state(cinode));
978 
979         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
980                                  fid->volatile_fid,
981                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
982 }
983 
984 static int
985 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
986              struct kstatfs *buf)
987 {
988         int rc;
989         __le16 srch_path = 0; /* Null - open root of share */
990         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
991         struct cifs_open_parms oparms;
992         struct cifs_fid fid;
993 
994         oparms.tcon = tcon;
995         oparms.desired_access = FILE_READ_ATTRIBUTES;
996         oparms.disposition = FILE_OPEN;
997         oparms.create_options = 0;
998         oparms.fid = &fid;
999         oparms.reconnect = false;
1000 
1001         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1002         if (rc)
1003                 return rc;
1004         buf->f_type = SMB2_MAGIC_NUMBER;
1005         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1006                            buf);
1007         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1008         return rc;
1009 }
1010 
1011 static bool
1012 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1013 {
1014         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1015                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1016 }
1017 
1018 static int
1019 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1020                __u64 length, __u32 type, int lock, int unlock, bool wait)
1021 {
1022         if (unlock && !lock)
1023                 type = SMB2_LOCKFLAG_UNLOCK;
1024         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1025                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1026                          current->tgid, length, offset, type, wait);
1027 }
1028 
1029 static void
1030 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1031 {
1032         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1033 }
1034 
1035 static void
1036 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1037 {
1038         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1039 }
1040 
1041 static void
1042 smb2_new_lease_key(struct cifs_fid *fid)
1043 {
1044         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
1045 }
1046 
1047 #define SMB2_SYMLINK_STRUCT_SIZE \
1048         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1049 
1050 static int
1051 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1052                    const char *full_path, char **target_path,
1053                    struct cifs_sb_info *cifs_sb)
1054 {
1055         int rc;
1056         __le16 *utf16_path;
1057         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1058         struct cifs_open_parms oparms;
1059         struct cifs_fid fid;
1060         struct smb2_err_rsp *err_buf = NULL;
1061         struct smb2_symlink_err_rsp *symlink;
1062         unsigned int sub_len;
1063         unsigned int sub_offset;
1064         unsigned int print_len;
1065         unsigned int print_offset;
1066 
1067         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1068 
1069         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1070         if (!utf16_path)
1071                 return -ENOMEM;
1072 
1073         oparms.tcon = tcon;
1074         oparms.desired_access = FILE_READ_ATTRIBUTES;
1075         oparms.disposition = FILE_OPEN;
1076         oparms.create_options = 0;
1077         oparms.fid = &fid;
1078         oparms.reconnect = false;
1079 
1080         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1081 
1082         if (!rc || !err_buf) {
1083                 kfree(utf16_path);
1084                 return -ENOENT;
1085         }
1086 
1087         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1088             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1089                 kfree(utf16_path);
1090                 return -ENOENT;
1091         }
1092 
1093         /* open must fail on symlink - reset rc */
1094         rc = 0;
1095         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1096         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1097         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1098         print_len = le16_to_cpu(symlink->PrintNameLength);
1099         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1100 
1101         if (get_rfc1002_length(err_buf) + 4 <
1102                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1103                 kfree(utf16_path);
1104                 return -ENOENT;
1105         }
1106 
1107         if (get_rfc1002_length(err_buf) + 4 <
1108                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1109                 kfree(utf16_path);
1110                 return -ENOENT;
1111         }
1112 
1113         *target_path = cifs_strndup_from_utf16(
1114                                 (char *)symlink->PathBuffer + sub_offset,
1115                                 sub_len, true, cifs_sb->local_nls);
1116         if (!(*target_path)) {
1117                 kfree(utf16_path);
1118                 return -ENOMEM;
1119         }
1120         convert_delimiter(*target_path, '/');
1121         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1122         kfree(utf16_path);
1123         return rc;
1124 }
1125 
1126 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1127                             loff_t offset, loff_t len, bool keep_size)
1128 {
1129         struct inode *inode;
1130         struct cifsInodeInfo *cifsi;
1131         struct cifsFileInfo *cfile = file->private_data;
1132         struct file_zero_data_information fsctl_buf;
1133         long rc;
1134         unsigned int xid;
1135 
1136         xid = get_xid();
1137 
1138         inode = d_inode(cfile->dentry);
1139         cifsi = CIFS_I(inode);
1140 
1141         /* if file not oplocked can't be sure whether asking to extend size */
1142         if (!CIFS_CACHE_READ(cifsi))
1143                 if (keep_size == false)
1144                         return -EOPNOTSUPP;
1145 
1146         /*
1147          * Must check if file sparse since fallocate -z (zero range) assumes
1148          * non-sparse allocation
1149          */
1150         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1151                 return -EOPNOTSUPP;
1152 
1153         /*
1154          * need to make sure we are not asked to extend the file since the SMB3
1155          * fsctl does not change the file size. In the future we could change
1156          * this to zero the first part of the range then set the file size
1157          * which for a non sparse file would zero the newly extended range
1158          */
1159         if (keep_size == false)
1160                 if (i_size_read(inode) < offset + len)
1161                         return -EOPNOTSUPP;
1162 
1163         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1164 
1165         fsctl_buf.FileOffset = cpu_to_le64(offset);
1166         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1167 
1168         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1169                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1170                         true /* is_fctl */, (char *)&fsctl_buf,
1171                         sizeof(struct file_zero_data_information), NULL, NULL);
1172         free_xid(xid);
1173         return rc;
1174 }
1175 
1176 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1177                             loff_t offset, loff_t len)
1178 {
1179         struct inode *inode;
1180         struct cifsInodeInfo *cifsi;
1181         struct cifsFileInfo *cfile = file->private_data;
1182         struct file_zero_data_information fsctl_buf;
1183         long rc;
1184         unsigned int xid;
1185         __u8 set_sparse = 1;
1186 
1187         xid = get_xid();
1188 
1189         inode = d_inode(cfile->dentry);
1190         cifsi = CIFS_I(inode);
1191 
1192         /* Need to make file sparse, if not already, before freeing range. */
1193         /* Consider adding equivalent for compressed since it could also work */
1194         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1195                 return -EOPNOTSUPP;
1196 
1197         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1198 
1199         fsctl_buf.FileOffset = cpu_to_le64(offset);
1200         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1201 
1202         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1203                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1204                         true /* is_fctl */, (char *)&fsctl_buf,
1205                         sizeof(struct file_zero_data_information), NULL, NULL);
1206         free_xid(xid);
1207         return rc;
1208 }
1209 
1210 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1211                             loff_t off, loff_t len, bool keep_size)
1212 {
1213         struct inode *inode;
1214         struct cifsInodeInfo *cifsi;
1215         struct cifsFileInfo *cfile = file->private_data;
1216         long rc = -EOPNOTSUPP;
1217         unsigned int xid;
1218 
1219         xid = get_xid();
1220 
1221         inode = d_inode(cfile->dentry);
1222         cifsi = CIFS_I(inode);
1223 
1224         /* if file not oplocked can't be sure whether asking to extend size */
1225         if (!CIFS_CACHE_READ(cifsi))
1226                 if (keep_size == false)
1227                         return -EOPNOTSUPP;
1228 
1229         /*
1230          * Files are non-sparse by default so falloc may be a no-op
1231          * Must check if file sparse. If not sparse, and not extending
1232          * then no need to do anything since file already allocated
1233          */
1234         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1235                 if (keep_size == true)
1236                         return 0;
1237                 /* check if extending file */
1238                 else if (i_size_read(inode) >= off + len)
1239                         /* not extending file and already not sparse */
1240                         return 0;
1241                 /* BB: in future add else clause to extend file */
1242                 else
1243                         return -EOPNOTSUPP;
1244         }
1245 
1246         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1247                 /*
1248                  * Check if falloc starts within first few pages of file
1249                  * and ends within a few pages of the end of file to
1250                  * ensure that most of file is being forced to be
1251                  * fallocated now. If so then setting whole file sparse
1252                  * ie potentially making a few extra pages at the beginning
1253                  * or end of the file non-sparse via set_sparse is harmless.
1254                  */
1255                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1256                         return -EOPNOTSUPP;
1257 
1258                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1259         }
1260         /* BB: else ... in future add code to extend file and set sparse */
1261 
1262 
1263         free_xid(xid);
1264         return rc;
1265 }
1266 
1267 
1268 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1269                            loff_t off, loff_t len)
1270 {
1271         /* KEEP_SIZE already checked for by do_fallocate */
1272         if (mode & FALLOC_FL_PUNCH_HOLE)
1273                 return smb3_punch_hole(file, tcon, off, len);
1274         else if (mode & FALLOC_FL_ZERO_RANGE) {
1275                 if (mode & FALLOC_FL_KEEP_SIZE)
1276                         return smb3_zero_range(file, tcon, off, len, true);
1277                 return smb3_zero_range(file, tcon, off, len, false);
1278         } else if (mode == FALLOC_FL_KEEP_SIZE)
1279                 return smb3_simple_falloc(file, tcon, off, len, true);
1280         else if (mode == 0)
1281                 return smb3_simple_falloc(file, tcon, off, len, false);
1282 
1283         return -EOPNOTSUPP;
1284 }
1285 
1286 static void
1287 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1288                         struct cifsInodeInfo *cinode, bool set_level2)
1289 {
1290         if (set_level2)
1291                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1292                                                 0, NULL);
1293         else
1294                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1295 }
1296 
1297 static void
1298 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1299                       unsigned int epoch, bool *purge_cache)
1300 {
1301         oplock &= 0xFF;
1302         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1303                 return;
1304         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1305                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1306                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1307                          &cinode->vfs_inode);
1308         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1309                 cinode->oplock = CIFS_CACHE_RW_FLG;
1310                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1311                          &cinode->vfs_inode);
1312         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1313                 cinode->oplock = CIFS_CACHE_READ_FLG;
1314                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1315                          &cinode->vfs_inode);
1316         } else
1317                 cinode->oplock = 0;
1318 }
1319 
1320 static void
1321 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1322                        unsigned int epoch, bool *purge_cache)
1323 {
1324         char message[5] = {0};
1325 
1326         oplock &= 0xFF;
1327         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1328                 return;
1329 
1330         cinode->oplock = 0;
1331         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1332                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1333                 strcat(message, "R");
1334         }
1335         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1336                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1337                 strcat(message, "H");
1338         }
1339         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1340                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1341                 strcat(message, "W");
1342         }
1343         if (!cinode->oplock)
1344                 strcat(message, "None");
1345         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1346                  &cinode->vfs_inode);
1347 }
1348 
1349 static void
1350 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1351                       unsigned int epoch, bool *purge_cache)
1352 {
1353         unsigned int old_oplock = cinode->oplock;
1354 
1355         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1356 
1357         if (purge_cache) {
1358                 *purge_cache = false;
1359                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1360                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1361                             (epoch - cinode->epoch > 0))
1362                                 *purge_cache = true;
1363                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1364                                  (epoch - cinode->epoch > 1))
1365                                 *purge_cache = true;
1366                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1367                                  (epoch - cinode->epoch > 1))
1368                                 *purge_cache = true;
1369                         else if (cinode->oplock == 0 &&
1370                                  (epoch - cinode->epoch > 0))
1371                                 *purge_cache = true;
1372                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1373                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1374                             (epoch - cinode->epoch > 0))
1375                                 *purge_cache = true;
1376                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1377                                  (epoch - cinode->epoch > 1))
1378                                 *purge_cache = true;
1379                 }
1380                 cinode->epoch = epoch;
1381         }
1382 }
1383 
1384 static bool
1385 smb2_is_read_op(__u32 oplock)
1386 {
1387         return oplock == SMB2_OPLOCK_LEVEL_II;
1388 }
1389 
1390 static bool
1391 smb21_is_read_op(__u32 oplock)
1392 {
1393         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1394                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1395 }
1396 
1397 static __le32
1398 map_oplock_to_lease(u8 oplock)
1399 {
1400         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1401                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1402         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1403                 return SMB2_LEASE_READ_CACHING;
1404         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1405                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1406                        SMB2_LEASE_WRITE_CACHING;
1407         return 0;
1408 }
1409 
1410 static char *
1411 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1412 {
1413         struct create_lease *buf;
1414 
1415         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1416         if (!buf)
1417                 return NULL;
1418 
1419         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1420         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1421         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1422 
1423         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1424                                         (struct create_lease, lcontext));
1425         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1426         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1427                                 (struct create_lease, Name));
1428         buf->ccontext.NameLength = cpu_to_le16(4);
1429         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1430         buf->Name[0] = 'R';
1431         buf->Name[1] = 'q';
1432         buf->Name[2] = 'L';
1433         buf->Name[3] = 's';
1434         return (char *)buf;
1435 }
1436 
1437 static char *
1438 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1439 {
1440         struct create_lease_v2 *buf;
1441 
1442         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1443         if (!buf)
1444                 return NULL;
1445 
1446         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1447         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1448         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1449 
1450         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1451                                         (struct create_lease_v2, lcontext));
1452         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1453         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1454                                 (struct create_lease_v2, Name));
1455         buf->ccontext.NameLength = cpu_to_le16(4);
1456         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1457         buf->Name[0] = 'R';
1458         buf->Name[1] = 'q';
1459         buf->Name[2] = 'L';
1460         buf->Name[3] = 's';
1461         return (char *)buf;
1462 }
1463 
1464 static __u8
1465 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1466 {
1467         struct create_lease *lc = (struct create_lease *)buf;
1468 
1469         *epoch = 0; /* not used */
1470         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1471                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1472         return le32_to_cpu(lc->lcontext.LeaseState);
1473 }
1474 
1475 static __u8
1476 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1477 {
1478         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1479 
1480         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1481         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1482                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1483         return le32_to_cpu(lc->lcontext.LeaseState);
1484 }
1485 
1486 static unsigned int
1487 smb2_wp_retry_size(struct inode *inode)
1488 {
1489         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1490                      SMB2_MAX_BUFFER_SIZE);
1491 }
1492 
1493 static bool
1494 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1495 {
1496         return !cfile->invalidHandle;
1497 }
1498 
1499 struct smb_version_operations smb20_operations = {
1500         .compare_fids = smb2_compare_fids,
1501         .setup_request = smb2_setup_request,
1502         .setup_async_request = smb2_setup_async_request,
1503         .check_receive = smb2_check_receive,
1504         .add_credits = smb2_add_credits,
1505         .set_credits = smb2_set_credits,
1506         .get_credits_field = smb2_get_credits_field,
1507         .get_credits = smb2_get_credits,
1508         .wait_mtu_credits = cifs_wait_mtu_credits,
1509         .get_next_mid = smb2_get_next_mid,
1510         .read_data_offset = smb2_read_data_offset,
1511         .read_data_length = smb2_read_data_length,
1512         .map_error = map_smb2_to_linux_error,
1513         .find_mid = smb2_find_mid,
1514         .check_message = smb2_check_message,
1515         .dump_detail = smb2_dump_detail,
1516         .clear_stats = smb2_clear_stats,
1517         .print_stats = smb2_print_stats,
1518         .is_oplock_break = smb2_is_valid_oplock_break,
1519         .downgrade_oplock = smb2_downgrade_oplock,
1520         .need_neg = smb2_need_neg,
1521         .negotiate = smb2_negotiate,
1522         .negotiate_wsize = smb2_negotiate_wsize,
1523         .negotiate_rsize = smb2_negotiate_rsize,
1524         .sess_setup = SMB2_sess_setup,
1525         .logoff = SMB2_logoff,
1526         .tree_connect = SMB2_tcon,
1527         .tree_disconnect = SMB2_tdis,
1528         .qfs_tcon = smb2_qfs_tcon,
1529         .is_path_accessible = smb2_is_path_accessible,
1530         .can_echo = smb2_can_echo,
1531         .echo = SMB2_echo,
1532         .query_path_info = smb2_query_path_info,
1533         .get_srv_inum = smb2_get_srv_inum,
1534         .query_file_info = smb2_query_file_info,
1535         .set_path_size = smb2_set_path_size,
1536         .set_file_size = smb2_set_file_size,
1537         .set_file_info = smb2_set_file_info,
1538         .set_compression = smb2_set_compression,
1539         .mkdir = smb2_mkdir,
1540         .mkdir_setinfo = smb2_mkdir_setinfo,
1541         .rmdir = smb2_rmdir,
1542         .unlink = smb2_unlink,
1543         .rename = smb2_rename_path,
1544         .create_hardlink = smb2_create_hardlink,
1545         .query_symlink = smb2_query_symlink,
1546         .open = smb2_open_file,
1547         .set_fid = smb2_set_fid,
1548         .close = smb2_close_file,
1549         .flush = smb2_flush_file,
1550         .async_readv = smb2_async_readv,
1551         .async_writev = smb2_async_writev,
1552         .sync_read = smb2_sync_read,
1553         .sync_write = smb2_sync_write,
1554         .query_dir_first = smb2_query_dir_first,
1555         .query_dir_next = smb2_query_dir_next,
1556         .close_dir = smb2_close_dir,
1557         .calc_smb_size = smb2_calc_size,
1558         .is_status_pending = smb2_is_status_pending,
1559         .oplock_response = smb2_oplock_response,
1560         .queryfs = smb2_queryfs,
1561         .mand_lock = smb2_mand_lock,
1562         .mand_unlock_range = smb2_unlock_range,
1563         .push_mand_locks = smb2_push_mandatory_locks,
1564         .get_lease_key = smb2_get_lease_key,
1565         .set_lease_key = smb2_set_lease_key,
1566         .new_lease_key = smb2_new_lease_key,
1567         .calc_signature = smb2_calc_signature,
1568         .is_read_op = smb2_is_read_op,
1569         .set_oplock_level = smb2_set_oplock_level,
1570         .create_lease_buf = smb2_create_lease_buf,
1571         .parse_lease_buf = smb2_parse_lease_buf,
1572         .clone_range = smb2_clone_range,
1573         .wp_retry_size = smb2_wp_retry_size,
1574         .dir_needs_close = smb2_dir_needs_close,
1575 };
1576 
1577 struct smb_version_operations smb21_operations = {
1578         .compare_fids = smb2_compare_fids,
1579         .setup_request = smb2_setup_request,
1580         .setup_async_request = smb2_setup_async_request,
1581         .check_receive = smb2_check_receive,
1582         .add_credits = smb2_add_credits,
1583         .set_credits = smb2_set_credits,
1584         .get_credits_field = smb2_get_credits_field,
1585         .get_credits = smb2_get_credits,
1586         .wait_mtu_credits = smb2_wait_mtu_credits,
1587         .get_next_mid = smb2_get_next_mid,
1588         .read_data_offset = smb2_read_data_offset,
1589         .read_data_length = smb2_read_data_length,
1590         .map_error = map_smb2_to_linux_error,
1591         .find_mid = smb2_find_mid,
1592         .check_message = smb2_check_message,
1593         .dump_detail = smb2_dump_detail,
1594         .clear_stats = smb2_clear_stats,
1595         .print_stats = smb2_print_stats,
1596         .is_oplock_break = smb2_is_valid_oplock_break,
1597         .downgrade_oplock = smb2_downgrade_oplock,
1598         .need_neg = smb2_need_neg,
1599         .negotiate = smb2_negotiate,
1600         .negotiate_wsize = smb2_negotiate_wsize,
1601         .negotiate_rsize = smb2_negotiate_rsize,
1602         .sess_setup = SMB2_sess_setup,
1603         .logoff = SMB2_logoff,
1604         .tree_connect = SMB2_tcon,
1605         .tree_disconnect = SMB2_tdis,
1606         .qfs_tcon = smb2_qfs_tcon,
1607         .is_path_accessible = smb2_is_path_accessible,
1608         .can_echo = smb2_can_echo,
1609         .echo = SMB2_echo,
1610         .query_path_info = smb2_query_path_info,
1611         .get_srv_inum = smb2_get_srv_inum,
1612         .query_file_info = smb2_query_file_info,
1613         .set_path_size = smb2_set_path_size,
1614         .set_file_size = smb2_set_file_size,
1615         .set_file_info = smb2_set_file_info,
1616         .set_compression = smb2_set_compression,
1617         .mkdir = smb2_mkdir,
1618         .mkdir_setinfo = smb2_mkdir_setinfo,
1619         .rmdir = smb2_rmdir,
1620         .unlink = smb2_unlink,
1621         .rename = smb2_rename_path,
1622         .create_hardlink = smb2_create_hardlink,
1623         .query_symlink = smb2_query_symlink,
1624         .query_mf_symlink = smb3_query_mf_symlink,
1625         .create_mf_symlink = smb3_create_mf_symlink,
1626         .open = smb2_open_file,
1627         .set_fid = smb2_set_fid,
1628         .close = smb2_close_file,
1629         .flush = smb2_flush_file,
1630         .async_readv = smb2_async_readv,
1631         .async_writev = smb2_async_writev,
1632         .sync_read = smb2_sync_read,
1633         .sync_write = smb2_sync_write,
1634         .query_dir_first = smb2_query_dir_first,
1635         .query_dir_next = smb2_query_dir_next,
1636         .close_dir = smb2_close_dir,
1637         .calc_smb_size = smb2_calc_size,
1638         .is_status_pending = smb2_is_status_pending,
1639         .oplock_response = smb2_oplock_response,
1640         .queryfs = smb2_queryfs,
1641         .mand_lock = smb2_mand_lock,
1642         .mand_unlock_range = smb2_unlock_range,
1643         .push_mand_locks = smb2_push_mandatory_locks,
1644         .get_lease_key = smb2_get_lease_key,
1645         .set_lease_key = smb2_set_lease_key,
1646         .new_lease_key = smb2_new_lease_key,
1647         .calc_signature = smb2_calc_signature,
1648         .is_read_op = smb21_is_read_op,
1649         .set_oplock_level = smb21_set_oplock_level,
1650         .create_lease_buf = smb2_create_lease_buf,
1651         .parse_lease_buf = smb2_parse_lease_buf,
1652         .clone_range = smb2_clone_range,
1653         .wp_retry_size = smb2_wp_retry_size,
1654         .dir_needs_close = smb2_dir_needs_close,
1655 };
1656 
1657 struct smb_version_operations smb30_operations = {
1658         .compare_fids = smb2_compare_fids,
1659         .setup_request = smb2_setup_request,
1660         .setup_async_request = smb2_setup_async_request,
1661         .check_receive = smb2_check_receive,
1662         .add_credits = smb2_add_credits,
1663         .set_credits = smb2_set_credits,
1664         .get_credits_field = smb2_get_credits_field,
1665         .get_credits = smb2_get_credits,
1666         .wait_mtu_credits = smb2_wait_mtu_credits,
1667         .get_next_mid = smb2_get_next_mid,
1668         .read_data_offset = smb2_read_data_offset,
1669         .read_data_length = smb2_read_data_length,
1670         .map_error = map_smb2_to_linux_error,
1671         .find_mid = smb2_find_mid,
1672         .check_message = smb2_check_message,
1673         .dump_detail = smb2_dump_detail,
1674         .clear_stats = smb2_clear_stats,
1675         .print_stats = smb2_print_stats,
1676         .dump_share_caps = smb2_dump_share_caps,
1677         .is_oplock_break = smb2_is_valid_oplock_break,
1678         .downgrade_oplock = smb2_downgrade_oplock,
1679         .need_neg = smb2_need_neg,
1680         .negotiate = smb2_negotiate,
1681         .negotiate_wsize = smb2_negotiate_wsize,
1682         .negotiate_rsize = smb2_negotiate_rsize,
1683         .sess_setup = SMB2_sess_setup,
1684         .logoff = SMB2_logoff,
1685         .tree_connect = SMB2_tcon,
1686         .tree_disconnect = SMB2_tdis,
1687         .qfs_tcon = smb3_qfs_tcon,
1688         .is_path_accessible = smb2_is_path_accessible,
1689         .can_echo = smb2_can_echo,
1690         .echo = SMB2_echo,
1691         .query_path_info = smb2_query_path_info,
1692         .get_srv_inum = smb2_get_srv_inum,
1693         .query_file_info = smb2_query_file_info,
1694         .set_path_size = smb2_set_path_size,
1695         .set_file_size = smb2_set_file_size,
1696         .set_file_info = smb2_set_file_info,
1697         .set_compression = smb2_set_compression,
1698         .mkdir = smb2_mkdir,
1699         .mkdir_setinfo = smb2_mkdir_setinfo,
1700         .rmdir = smb2_rmdir,
1701         .unlink = smb2_unlink,
1702         .rename = smb2_rename_path,
1703         .create_hardlink = smb2_create_hardlink,
1704         .query_symlink = smb2_query_symlink,
1705         .query_mf_symlink = smb3_query_mf_symlink,
1706         .create_mf_symlink = smb3_create_mf_symlink,
1707         .open = smb2_open_file,
1708         .set_fid = smb2_set_fid,
1709         .close = smb2_close_file,
1710         .flush = smb2_flush_file,
1711         .async_readv = smb2_async_readv,
1712         .async_writev = smb2_async_writev,
1713         .sync_read = smb2_sync_read,
1714         .sync_write = smb2_sync_write,
1715         .query_dir_first = smb2_query_dir_first,
1716         .query_dir_next = smb2_query_dir_next,
1717         .close_dir = smb2_close_dir,
1718         .calc_smb_size = smb2_calc_size,
1719         .is_status_pending = smb2_is_status_pending,
1720         .oplock_response = smb2_oplock_response,
1721         .queryfs = smb2_queryfs,
1722         .mand_lock = smb2_mand_lock,
1723         .mand_unlock_range = smb2_unlock_range,
1724         .push_mand_locks = smb2_push_mandatory_locks,
1725         .get_lease_key = smb2_get_lease_key,
1726         .set_lease_key = smb2_set_lease_key,
1727         .new_lease_key = smb2_new_lease_key,
1728         .generate_signingkey = generate_smb30signingkey,
1729         .calc_signature = smb3_calc_signature,
1730         .set_integrity  = smb3_set_integrity,
1731         .is_read_op = smb21_is_read_op,
1732         .set_oplock_level = smb3_set_oplock_level,
1733         .create_lease_buf = smb3_create_lease_buf,
1734         .parse_lease_buf = smb3_parse_lease_buf,
1735         .clone_range = smb2_clone_range,
1736         .duplicate_extents = smb2_duplicate_extents,
1737         .validate_negotiate = smb3_validate_negotiate,
1738         .wp_retry_size = smb2_wp_retry_size,
1739         .dir_needs_close = smb2_dir_needs_close,
1740         .fallocate = smb3_fallocate,
1741 };
1742 
1743 #ifdef CONFIG_CIFS_SMB311
1744 struct smb_version_operations smb311_operations = {
1745         .compare_fids = smb2_compare_fids,
1746         .setup_request = smb2_setup_request,
1747         .setup_async_request = smb2_setup_async_request,
1748         .check_receive = smb2_check_receive,
1749         .add_credits = smb2_add_credits,
1750         .set_credits = smb2_set_credits,
1751         .get_credits_field = smb2_get_credits_field,
1752         .get_credits = smb2_get_credits,
1753         .wait_mtu_credits = smb2_wait_mtu_credits,
1754         .get_next_mid = smb2_get_next_mid,
1755         .read_data_offset = smb2_read_data_offset,
1756         .read_data_length = smb2_read_data_length,
1757         .map_error = map_smb2_to_linux_error,
1758         .find_mid = smb2_find_mid,
1759         .check_message = smb2_check_message,
1760         .dump_detail = smb2_dump_detail,
1761         .clear_stats = smb2_clear_stats,
1762         .print_stats = smb2_print_stats,
1763         .dump_share_caps = smb2_dump_share_caps,
1764         .is_oplock_break = smb2_is_valid_oplock_break,
1765         .downgrade_oplock = smb2_downgrade_oplock,
1766         .need_neg = smb2_need_neg,
1767         .negotiate = smb2_negotiate,
1768         .negotiate_wsize = smb2_negotiate_wsize,
1769         .negotiate_rsize = smb2_negotiate_rsize,
1770         .sess_setup = SMB2_sess_setup,
1771         .logoff = SMB2_logoff,
1772         .tree_connect = SMB2_tcon,
1773         .tree_disconnect = SMB2_tdis,
1774         .qfs_tcon = smb3_qfs_tcon,
1775         .is_path_accessible = smb2_is_path_accessible,
1776         .can_echo = smb2_can_echo,
1777         .echo = SMB2_echo,
1778         .query_path_info = smb2_query_path_info,
1779         .get_srv_inum = smb2_get_srv_inum,
1780         .query_file_info = smb2_query_file_info,
1781         .set_path_size = smb2_set_path_size,
1782         .set_file_size = smb2_set_file_size,
1783         .set_file_info = smb2_set_file_info,
1784         .set_compression = smb2_set_compression,
1785         .mkdir = smb2_mkdir,
1786         .mkdir_setinfo = smb2_mkdir_setinfo,
1787         .rmdir = smb2_rmdir,
1788         .unlink = smb2_unlink,
1789         .rename = smb2_rename_path,
1790         .create_hardlink = smb2_create_hardlink,
1791         .query_symlink = smb2_query_symlink,
1792         .query_mf_symlink = smb3_query_mf_symlink,
1793         .create_mf_symlink = smb3_create_mf_symlink,
1794         .open = smb2_open_file,
1795         .set_fid = smb2_set_fid,
1796         .close = smb2_close_file,
1797         .flush = smb2_flush_file,
1798         .async_readv = smb2_async_readv,
1799         .async_writev = smb2_async_writev,
1800         .sync_read = smb2_sync_read,
1801         .sync_write = smb2_sync_write,
1802         .query_dir_first = smb2_query_dir_first,
1803         .query_dir_next = smb2_query_dir_next,
1804         .close_dir = smb2_close_dir,
1805         .calc_smb_size = smb2_calc_size,
1806         .is_status_pending = smb2_is_status_pending,
1807         .oplock_response = smb2_oplock_response,
1808         .queryfs = smb2_queryfs,
1809         .mand_lock = smb2_mand_lock,
1810         .mand_unlock_range = smb2_unlock_range,
1811         .push_mand_locks = smb2_push_mandatory_locks,
1812         .get_lease_key = smb2_get_lease_key,
1813         .set_lease_key = smb2_set_lease_key,
1814         .new_lease_key = smb2_new_lease_key,
1815         .generate_signingkey = generate_smb311signingkey,
1816         .calc_signature = smb3_calc_signature,
1817         .set_integrity  = smb3_set_integrity,
1818         .is_read_op = smb21_is_read_op,
1819         .set_oplock_level = smb3_set_oplock_level,
1820         .create_lease_buf = smb3_create_lease_buf,
1821         .parse_lease_buf = smb3_parse_lease_buf,
1822         .clone_range = smb2_clone_range,
1823         .duplicate_extents = smb2_duplicate_extents,
1824 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1825         .wp_retry_size = smb2_wp_retry_size,
1826         .dir_needs_close = smb2_dir_needs_close,
1827         .fallocate = smb3_fallocate,
1828 };
1829 #endif /* CIFS_SMB311 */
1830 
1831 struct smb_version_values smb20_values = {
1832         .version_string = SMB20_VERSION_STRING,
1833         .protocol_id = SMB20_PROT_ID,
1834         .req_capabilities = 0, /* MBZ */
1835         .large_lock_type = 0,
1836         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1837         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1838         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1839         .header_size = sizeof(struct smb2_hdr),
1840         .max_header_size = MAX_SMB2_HDR_SIZE,
1841         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1842         .lock_cmd = SMB2_LOCK,
1843         .cap_unix = 0,
1844         .cap_nt_find = SMB2_NT_FIND,
1845         .cap_large_files = SMB2_LARGE_FILES,
1846         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1847         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1848         .create_lease_size = sizeof(struct create_lease),
1849 };
1850 
1851 struct smb_version_values smb21_values = {
1852         .version_string = SMB21_VERSION_STRING,
1853         .protocol_id = SMB21_PROT_ID,
1854         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1855         .large_lock_type = 0,
1856         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1857         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1858         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1859         .header_size = sizeof(struct smb2_hdr),
1860         .max_header_size = MAX_SMB2_HDR_SIZE,
1861         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1862         .lock_cmd = SMB2_LOCK,
1863         .cap_unix = 0,
1864         .cap_nt_find = SMB2_NT_FIND,
1865         .cap_large_files = SMB2_LARGE_FILES,
1866         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1867         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1868         .create_lease_size = sizeof(struct create_lease),
1869 };
1870 
1871 struct smb_version_values smb30_values = {
1872         .version_string = SMB30_VERSION_STRING,
1873         .protocol_id = SMB30_PROT_ID,
1874         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
1875         .large_lock_type = 0,
1876         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1877         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1878         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1879         .header_size = sizeof(struct smb2_hdr),
1880         .max_header_size = MAX_SMB2_HDR_SIZE,
1881         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1882         .lock_cmd = SMB2_LOCK,
1883         .cap_unix = 0,
1884         .cap_nt_find = SMB2_NT_FIND,
1885         .cap_large_files = SMB2_LARGE_FILES,
1886         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1887         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1888         .create_lease_size = sizeof(struct create_lease_v2),
1889 };
1890 
1891 struct smb_version_values smb302_values = {
1892         .version_string = SMB302_VERSION_STRING,
1893         .protocol_id = SMB302_PROT_ID,
1894         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
1895         .large_lock_type = 0,
1896         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1897         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1898         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1899         .header_size = sizeof(struct smb2_hdr),
1900         .max_header_size = MAX_SMB2_HDR_SIZE,
1901         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1902         .lock_cmd = SMB2_LOCK,
1903         .cap_unix = 0,
1904         .cap_nt_find = SMB2_NT_FIND,
1905         .cap_large_files = SMB2_LARGE_FILES,
1906         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1907         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1908         .create_lease_size = sizeof(struct create_lease_v2),
1909 };
1910 
1911 #ifdef CONFIG_CIFS_SMB311
1912 struct smb_version_values smb311_values = {
1913         .version_string = SMB311_VERSION_STRING,
1914         .protocol_id = SMB311_PROT_ID,
1915         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1916         .large_lock_type = 0,
1917         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1918         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1919         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1920         .header_size = sizeof(struct smb2_hdr),
1921         .max_header_size = MAX_SMB2_HDR_SIZE,
1922         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1923         .lock_cmd = SMB2_LOCK,
1924         .cap_unix = 0,
1925         .cap_nt_find = SMB2_NT_FIND,
1926         .cap_large_files = SMB2_LARGE_FILES,
1927         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1928         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1929         .create_lease_size = sizeof(struct create_lease_v2),
1930 };
1931 #endif /* SMB311 */
1932 

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