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

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  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         spin_lock(&GlobalMid_Lock);
186         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
187                 if ((mid->mid == wire_mid) &&
188                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
189                     (mid->command == hdr->Command)) {
190                         spin_unlock(&GlobalMid_Lock);
191                         return mid;
192                 }
193         }
194         spin_unlock(&GlobalMid_Lock);
195         return NULL;
196 }
197 
198 static void
199 smb2_dump_detail(void *buf)
200 {
201 #ifdef CONFIG_CIFS_DEBUG2
202         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
203 
204         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
205                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
206                  smb->ProcessId);
207         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
208 #endif
209 }
210 
211 static bool
212 smb2_need_neg(struct TCP_Server_Info *server)
213 {
214         return server->max_read == 0;
215 }
216 
217 static int
218 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
219 {
220         int rc;
221         ses->server->CurrentMid = 0;
222         rc = SMB2_negotiate(xid, ses);
223         /* BB we probably don't need to retry with modern servers */
224         if (rc == -EAGAIN)
225                 rc = -EHOSTDOWN;
226         return rc;
227 }
228 
229 static unsigned int
230 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
231 {
232         struct TCP_Server_Info *server = tcon->ses->server;
233         unsigned int wsize;
234 
235         /* start with specified wsize, or default */
236         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
237         wsize = min_t(unsigned int, wsize, server->max_write);
238 
239         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
240                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
241 
242         return wsize;
243 }
244 
245 static unsigned int
246 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
247 {
248         struct TCP_Server_Info *server = tcon->ses->server;
249         unsigned int rsize;
250 
251         /* start with specified rsize, or default */
252         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
253         rsize = min_t(unsigned int, rsize, server->max_read);
254 
255         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
256                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
257 
258         return rsize;
259 }
260 
261 #ifdef CONFIG_CIFS_STATS2
262 static int
263 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
264 {
265         int rc;
266         unsigned int ret_data_len = 0;
267         struct network_interface_info_ioctl_rsp *out_buf;
268 
269         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
270                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
271                         NULL /* no data input */, 0 /* no data input */,
272                         (char **)&out_buf, &ret_data_len);
273         if (rc != 0)
274                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
275         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
276                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
277                 rc = -EINVAL;
278         } else {
279                 /* Dump info on first interface */
280                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
281                         le32_to_cpu(out_buf->Capability));
282                 cifs_dbg(FYI, "Link Speed %lld\n",
283                         le64_to_cpu(out_buf->LinkSpeed));
284         }
285 
286         return rc;
287 }
288 #endif /* STATS2 */
289 
290 static void
291 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
292 {
293         int rc;
294         __le16 srch_path = 0; /* Null - open root of share */
295         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
296         struct cifs_open_parms oparms;
297         struct cifs_fid fid;
298 
299         oparms.tcon = tcon;
300         oparms.desired_access = FILE_READ_ATTRIBUTES;
301         oparms.disposition = FILE_OPEN;
302         oparms.create_options = 0;
303         oparms.fid = &fid;
304         oparms.reconnect = false;
305 
306         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
307         if (rc)
308                 return;
309 
310 #ifdef CONFIG_CIFS_STATS2
311         SMB3_request_interfaces(xid, tcon);
312 #endif /* STATS2 */
313 
314         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
315                         FS_ATTRIBUTE_INFORMATION);
316         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
317                         FS_DEVICE_INFORMATION);
318         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
319                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
320         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
321         return;
322 }
323 
324 static void
325 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
326 {
327         int rc;
328         __le16 srch_path = 0; /* Null - open root of share */
329         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
330         struct cifs_open_parms oparms;
331         struct cifs_fid fid;
332 
333         oparms.tcon = tcon;
334         oparms.desired_access = FILE_READ_ATTRIBUTES;
335         oparms.disposition = FILE_OPEN;
336         oparms.create_options = 0;
337         oparms.fid = &fid;
338         oparms.reconnect = false;
339 
340         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
341         if (rc)
342                 return;
343 
344         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
345                         FS_ATTRIBUTE_INFORMATION);
346         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
347                         FS_DEVICE_INFORMATION);
348         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
349         return;
350 }
351 
352 static int
353 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
354                         struct cifs_sb_info *cifs_sb, const char *full_path)
355 {
356         int rc;
357         __le16 *utf16_path;
358         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
359         struct cifs_open_parms oparms;
360         struct cifs_fid fid;
361 
362         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
363         if (!utf16_path)
364                 return -ENOMEM;
365 
366         oparms.tcon = tcon;
367         oparms.desired_access = FILE_READ_ATTRIBUTES;
368         oparms.disposition = FILE_OPEN;
369         oparms.create_options = 0;
370         oparms.fid = &fid;
371         oparms.reconnect = false;
372 
373         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
374         if (rc) {
375                 kfree(utf16_path);
376                 return rc;
377         }
378 
379         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
380         kfree(utf16_path);
381         return rc;
382 }
383 
384 static int
385 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
386                   struct cifs_sb_info *cifs_sb, const char *full_path,
387                   u64 *uniqueid, FILE_ALL_INFO *data)
388 {
389         *uniqueid = le64_to_cpu(data->IndexNumber);
390         return 0;
391 }
392 
393 static int
394 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
395                      struct cifs_fid *fid, FILE_ALL_INFO *data)
396 {
397         int rc;
398         struct smb2_file_all_info *smb2_data;
399 
400         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
401                             GFP_KERNEL);
402         if (smb2_data == NULL)
403                 return -ENOMEM;
404 
405         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
406                              smb2_data);
407         if (!rc)
408                 move_smb2_info_to_cifs(data, smb2_data);
409         kfree(smb2_data);
410         return rc;
411 }
412 
413 static bool
414 smb2_can_echo(struct TCP_Server_Info *server)
415 {
416         return server->echoes;
417 }
418 
419 static void
420 smb2_clear_stats(struct cifs_tcon *tcon)
421 {
422 #ifdef CONFIG_CIFS_STATS
423         int i;
424         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
425                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
426                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
427         }
428 #endif
429 }
430 
431 static void
432 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
433 {
434         seq_puts(m, "\n\tShare Capabilities:");
435         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
436                 seq_puts(m, " DFS,");
437         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
438                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
439         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
440                 seq_puts(m, " SCALEOUT,");
441         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
442                 seq_puts(m, " CLUSTER,");
443         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
444                 seq_puts(m, " ASYMMETRIC,");
445         if (tcon->capabilities == 0)
446                 seq_puts(m, " None");
447         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
448                 seq_puts(m, " Aligned,");
449         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
450                 seq_puts(m, " Partition Aligned,");
451         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
452                 seq_puts(m, " SSD,");
453         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
454                 seq_puts(m, " TRIM-support,");
455 
456         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
457         if (tcon->perf_sector_size)
458                 seq_printf(m, "\tOptimal sector size: 0x%x",
459                            tcon->perf_sector_size);
460 }
461 
462 static void
463 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
464 {
465 #ifdef CONFIG_CIFS_STATS
466         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
467         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
468         seq_printf(m, "\nNegotiates: %d sent %d failed",
469                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
470                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
471         seq_printf(m, "\nSessionSetups: %d sent %d failed",
472                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
473                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
474         seq_printf(m, "\nLogoffs: %d sent %d failed",
475                    atomic_read(&sent[SMB2_LOGOFF_HE]),
476                    atomic_read(&failed[SMB2_LOGOFF_HE]));
477         seq_printf(m, "\nTreeConnects: %d sent %d failed",
478                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
479                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
480         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
481                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
482                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
483         seq_printf(m, "\nCreates: %d sent %d failed",
484                    atomic_read(&sent[SMB2_CREATE_HE]),
485                    atomic_read(&failed[SMB2_CREATE_HE]));
486         seq_printf(m, "\nCloses: %d sent %d failed",
487                    atomic_read(&sent[SMB2_CLOSE_HE]),
488                    atomic_read(&failed[SMB2_CLOSE_HE]));
489         seq_printf(m, "\nFlushes: %d sent %d failed",
490                    atomic_read(&sent[SMB2_FLUSH_HE]),
491                    atomic_read(&failed[SMB2_FLUSH_HE]));
492         seq_printf(m, "\nReads: %d sent %d failed",
493                    atomic_read(&sent[SMB2_READ_HE]),
494                    atomic_read(&failed[SMB2_READ_HE]));
495         seq_printf(m, "\nWrites: %d sent %d failed",
496                    atomic_read(&sent[SMB2_WRITE_HE]),
497                    atomic_read(&failed[SMB2_WRITE_HE]));
498         seq_printf(m, "\nLocks: %d sent %d failed",
499                    atomic_read(&sent[SMB2_LOCK_HE]),
500                    atomic_read(&failed[SMB2_LOCK_HE]));
501         seq_printf(m, "\nIOCTLs: %d sent %d failed",
502                    atomic_read(&sent[SMB2_IOCTL_HE]),
503                    atomic_read(&failed[SMB2_IOCTL_HE]));
504         seq_printf(m, "\nCancels: %d sent %d failed",
505                    atomic_read(&sent[SMB2_CANCEL_HE]),
506                    atomic_read(&failed[SMB2_CANCEL_HE]));
507         seq_printf(m, "\nEchos: %d sent %d failed",
508                    atomic_read(&sent[SMB2_ECHO_HE]),
509                    atomic_read(&failed[SMB2_ECHO_HE]));
510         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
511                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
512                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
513         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
514                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
515                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
516         seq_printf(m, "\nQueryInfos: %d sent %d failed",
517                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
518                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
519         seq_printf(m, "\nSetInfos: %d sent %d failed",
520                    atomic_read(&sent[SMB2_SET_INFO_HE]),
521                    atomic_read(&failed[SMB2_SET_INFO_HE]));
522         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
523                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
524                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
525 #endif
526 }
527 
528 static void
529 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
530 {
531         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
532         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
533 
534         cfile->fid.persistent_fid = fid->persistent_fid;
535         cfile->fid.volatile_fid = fid->volatile_fid;
536         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
537                                       &fid->purge_cache);
538         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
539 }
540 
541 static void
542 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
543                 struct cifs_fid *fid)
544 {
545         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
546 }
547 
548 static int
549 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
550                      u64 persistent_fid, u64 volatile_fid,
551                      struct copychunk_ioctl *pcchunk)
552 {
553         int rc;
554         unsigned int ret_data_len;
555         struct resume_key_req *res_key;
556 
557         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
558                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
559                         NULL, 0 /* no input */,
560                         (char **)&res_key, &ret_data_len);
561 
562         if (rc) {
563                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
564                 goto req_res_key_exit;
565         }
566         if (ret_data_len < sizeof(struct resume_key_req)) {
567                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
568                 rc = -EINVAL;
569                 goto req_res_key_exit;
570         }
571         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
572 
573 req_res_key_exit:
574         kfree(res_key);
575         return rc;
576 }
577 
578 static int
579 smb2_clone_range(const unsigned int xid,
580                         struct cifsFileInfo *srcfile,
581                         struct cifsFileInfo *trgtfile, u64 src_off,
582                         u64 len, u64 dest_off)
583 {
584         int rc;
585         unsigned int ret_data_len;
586         struct copychunk_ioctl *pcchunk;
587         struct copychunk_ioctl_rsp *retbuf = NULL;
588         struct cifs_tcon *tcon;
589         int chunks_copied = 0;
590         bool chunk_sizes_updated = false;
591 
592         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
593 
594         if (pcchunk == NULL)
595                 return -ENOMEM;
596 
597         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
598         /* Request a key from the server to identify the source of the copy */
599         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
600                                 srcfile->fid.persistent_fid,
601                                 srcfile->fid.volatile_fid, pcchunk);
602 
603         /* Note: request_res_key sets res_key null only if rc !=0 */
604         if (rc)
605                 goto cchunk_out;
606 
607         /* For now array only one chunk long, will make more flexible later */
608         pcchunk->ChunkCount = cpu_to_le32(1);
609         pcchunk->Reserved = 0;
610         pcchunk->Reserved2 = 0;
611 
612         tcon = tlink_tcon(trgtfile->tlink);
613 
614         while (len > 0) {
615                 pcchunk->SourceOffset = cpu_to_le64(src_off);
616                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
617                 pcchunk->Length =
618                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
619 
620                 /* Request server copy to target from src identified by key */
621                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
622                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
623                         true /* is_fsctl */, (char *)pcchunk,
624                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
625                         &ret_data_len);
626                 if (rc == 0) {
627                         if (ret_data_len !=
628                                         sizeof(struct copychunk_ioctl_rsp)) {
629                                 cifs_dbg(VFS, "invalid cchunk response size\n");
630                                 rc = -EIO;
631                                 goto cchunk_out;
632                         }
633                         if (retbuf->TotalBytesWritten == 0) {
634                                 cifs_dbg(FYI, "no bytes copied\n");
635                                 rc = -EIO;
636                                 goto cchunk_out;
637                         }
638                         /*
639                          * Check if server claimed to write more than we asked
640                          */
641                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
642                             le32_to_cpu(pcchunk->Length)) {
643                                 cifs_dbg(VFS, "invalid copy chunk response\n");
644                                 rc = -EIO;
645                                 goto cchunk_out;
646                         }
647                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
648                                 cifs_dbg(VFS, "invalid num chunks written\n");
649                                 rc = -EIO;
650                                 goto cchunk_out;
651                         }
652                         chunks_copied++;
653 
654                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
655                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
656                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
657 
658                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
659                                 le32_to_cpu(retbuf->ChunksWritten),
660                                 le32_to_cpu(retbuf->ChunkBytesWritten),
661                                 le32_to_cpu(retbuf->TotalBytesWritten));
662                 } else if (rc == -EINVAL) {
663                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
664                                 goto cchunk_out;
665 
666                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
667                                 le32_to_cpu(retbuf->ChunksWritten),
668                                 le32_to_cpu(retbuf->ChunkBytesWritten),
669                                 le32_to_cpu(retbuf->TotalBytesWritten));
670 
671                         /*
672                          * Check if this is the first request using these sizes,
673                          * (ie check if copy succeed once with original sizes
674                          * and check if the server gave us different sizes after
675                          * we already updated max sizes on previous request).
676                          * if not then why is the server returning an error now
677                          */
678                         if ((chunks_copied != 0) || chunk_sizes_updated)
679                                 goto cchunk_out;
680 
681                         /* Check that server is not asking us to grow size */
682                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
683                                         tcon->max_bytes_chunk)
684                                 tcon->max_bytes_chunk =
685                                         le32_to_cpu(retbuf->ChunkBytesWritten);
686                         else
687                                 goto cchunk_out; /* server gave us bogus size */
688 
689                         /* No need to change MaxChunks since already set to 1 */
690                         chunk_sizes_updated = true;
691                 } else
692                         goto cchunk_out;
693         }
694 
695 cchunk_out:
696         kfree(pcchunk);
697         return rc;
698 }
699 
700 static int
701 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
702                 struct cifs_fid *fid)
703 {
704         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
705 }
706 
707 static unsigned int
708 smb2_read_data_offset(char *buf)
709 {
710         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
711         return rsp->DataOffset;
712 }
713 
714 static unsigned int
715 smb2_read_data_length(char *buf)
716 {
717         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
718         return le32_to_cpu(rsp->DataLength);
719 }
720 
721 
722 static int
723 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
724                struct cifs_io_parms *parms, unsigned int *bytes_read,
725                char **buf, int *buf_type)
726 {
727         parms->persistent_fid = pfid->persistent_fid;
728         parms->volatile_fid = pfid->volatile_fid;
729         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
730 }
731 
732 static int
733 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
734                 struct cifs_io_parms *parms, unsigned int *written,
735                 struct kvec *iov, unsigned long nr_segs)
736 {
737 
738         parms->persistent_fid = pfid->persistent_fid;
739         parms->volatile_fid = pfid->volatile_fid;
740         return SMB2_write(xid, parms, written, iov, nr_segs);
741 }
742 
743 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
744 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
745                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
746 {
747         struct cifsInodeInfo *cifsi;
748         int rc;
749 
750         cifsi = CIFS_I(inode);
751 
752         /* if file already sparse don't bother setting sparse again */
753         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
754                 return true; /* already sparse */
755 
756         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
757                 return true; /* already not sparse */
758 
759         /*
760          * Can't check for sparse support on share the usual way via the
761          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
762          * since Samba server doesn't set the flag on the share, yet
763          * supports the set sparse FSCTL and returns sparse correctly
764          * in the file attributes. If we fail setting sparse though we
765          * mark that server does not support sparse files for this share
766          * to avoid repeatedly sending the unsupported fsctl to server
767          * if the file is repeatedly extended.
768          */
769         if (tcon->broken_sparse_sup)
770                 return false;
771 
772         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
773                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
774                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
775         if (rc) {
776                 tcon->broken_sparse_sup = true;
777                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
778                 return false;
779         }
780 
781         if (setsparse)
782                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
783         else
784                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
785 
786         return true;
787 }
788 
789 static int
790 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
791                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
792 {
793         __le64 eof = cpu_to_le64(size);
794         struct inode *inode;
795 
796         /*
797          * If extending file more than one page make sparse. Many Linux fs
798          * make files sparse by default when extending via ftruncate
799          */
800         inode = d_inode(cfile->dentry);
801 
802         if (!set_alloc && (size > inode->i_size + 8192)) {
803                 __u8 set_sparse = 1;
804 
805                 /* whether set sparse succeeds or not, extend the file */
806                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
807         }
808 
809         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
810                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
811 }
812 
813 #ifdef CONFIG_CIFS_SMB311
814 static int
815 smb2_duplicate_extents(const unsigned int xid,
816                         struct cifsFileInfo *srcfile,
817                         struct cifsFileInfo *trgtfile, u64 src_off,
818                         u64 len, u64 dest_off)
819 {
820         int rc;
821         unsigned int ret_data_len;
822         char *retbuf = NULL;
823         struct duplicate_extents_to_file dup_ext_buf;
824         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
825 
826         /* server fileays advertise duplicate extent support with this flag */
827         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
828              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
829                 return -EOPNOTSUPP;
830 
831         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
832         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
833         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
834         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
835         dup_ext_buf.ByteCount = cpu_to_le64(len);
836         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
837                 src_off, dest_off, len);
838 
839         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
840         if (rc)
841                 goto duplicate_extents_out;
842 
843         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
844                         trgtfile->fid.volatile_fid,
845                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
846                         true /* is_fsctl */, (char *)&dup_ext_buf,
847                         sizeof(struct duplicate_extents_to_file),
848                         (char **)&retbuf,
849                         &ret_data_len);
850 
851         if (ret_data_len > 0)
852                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
853 
854 duplicate_extents_out:
855         return rc;
856 }
857 #endif /* CONFIG_CIFS_SMB311 */
858 
859 
860 static int
861 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
862                    struct cifsFileInfo *cfile)
863 {
864         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
865                             cfile->fid.volatile_fid);
866 }
867 
868 static int
869 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
870                    struct cifsFileInfo *cfile)
871 {
872         struct fsctl_set_integrity_information_req integr_info;
873         char *retbuf = NULL;
874         unsigned int ret_data_len;
875 
876         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
877         integr_info.Flags = 0;
878         integr_info.Reserved = 0;
879 
880         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
881                         cfile->fid.volatile_fid,
882                         FSCTL_SET_INTEGRITY_INFORMATION,
883                         true /* is_fsctl */, (char *)&integr_info,
884                         sizeof(struct fsctl_set_integrity_information_req),
885                         (char **)&retbuf,
886                         &ret_data_len);
887 
888 }
889 
890 static int
891 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
892                      const char *path, struct cifs_sb_info *cifs_sb,
893                      struct cifs_fid *fid, __u16 search_flags,
894                      struct cifs_search_info *srch_inf)
895 {
896         __le16 *utf16_path;
897         int rc;
898         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
899         struct cifs_open_parms oparms;
900 
901         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
902         if (!utf16_path)
903                 return -ENOMEM;
904 
905         oparms.tcon = tcon;
906         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
907         oparms.disposition = FILE_OPEN;
908         oparms.create_options = 0;
909         oparms.fid = fid;
910         oparms.reconnect = false;
911 
912         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
913         kfree(utf16_path);
914         if (rc) {
915                 cifs_dbg(VFS, "open dir failed\n");
916                 return rc;
917         }
918 
919         srch_inf->entries_in_buffer = 0;
920         srch_inf->index_of_last_entry = 0;
921 
922         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
923                                   fid->volatile_fid, 0, srch_inf);
924         if (rc) {
925                 cifs_dbg(VFS, "query directory failed\n");
926                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
927         }
928         return rc;
929 }
930 
931 static int
932 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
933                     struct cifs_fid *fid, __u16 search_flags,
934                     struct cifs_search_info *srch_inf)
935 {
936         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
937                                     fid->volatile_fid, 0, srch_inf);
938 }
939 
940 static int
941 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
942                struct cifs_fid *fid)
943 {
944         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
945 }
946 
947 /*
948 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
949 * the number of credits and return true. Otherwise - return false.
950 */
951 static bool
952 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
953 {
954         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
955 
956         if (hdr->Status != STATUS_PENDING)
957                 return false;
958 
959         if (!length) {
960                 spin_lock(&server->req_lock);
961                 server->credits += le16_to_cpu(hdr->CreditRequest);
962                 spin_unlock(&server->req_lock);
963                 wake_up(&server->request_q);
964         }
965 
966         return true;
967 }
968 
969 static int
970 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
971                      struct cifsInodeInfo *cinode)
972 {
973         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
974                 return SMB2_lease_break(0, tcon, cinode->lease_key,
975                                         smb2_get_lease_state(cinode));
976 
977         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
978                                  fid->volatile_fid,
979                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
980 }
981 
982 static int
983 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
984              struct kstatfs *buf)
985 {
986         int rc;
987         __le16 srch_path = 0; /* Null - open root of share */
988         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
989         struct cifs_open_parms oparms;
990         struct cifs_fid fid;
991 
992         oparms.tcon = tcon;
993         oparms.desired_access = FILE_READ_ATTRIBUTES;
994         oparms.disposition = FILE_OPEN;
995         oparms.create_options = 0;
996         oparms.fid = &fid;
997         oparms.reconnect = false;
998 
999         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1000         if (rc)
1001                 return rc;
1002         buf->f_type = SMB2_MAGIC_NUMBER;
1003         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1004                            buf);
1005         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1006         return rc;
1007 }
1008 
1009 static bool
1010 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1011 {
1012         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1013                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1014 }
1015 
1016 static int
1017 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1018                __u64 length, __u32 type, int lock, int unlock, bool wait)
1019 {
1020         if (unlock && !lock)
1021                 type = SMB2_LOCKFLAG_UNLOCK;
1022         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1023                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1024                          current->tgid, length, offset, type, wait);
1025 }
1026 
1027 static void
1028 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1029 {
1030         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1031 }
1032 
1033 static void
1034 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1035 {
1036         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1037 }
1038 
1039 static void
1040 smb2_new_lease_key(struct cifs_fid *fid)
1041 {
1042         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
1043 }
1044 
1045 static int
1046 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1047                    const char *full_path, char **target_path,
1048                    struct cifs_sb_info *cifs_sb)
1049 {
1050         int rc;
1051         __le16 *utf16_path;
1052         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1053         struct cifs_open_parms oparms;
1054         struct cifs_fid fid;
1055         struct smb2_err_rsp *err_buf = NULL;
1056         struct smb2_symlink_err_rsp *symlink;
1057         unsigned int sub_len, sub_offset;
1058 
1059         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1060 
1061         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1062         if (!utf16_path)
1063                 return -ENOMEM;
1064 
1065         oparms.tcon = tcon;
1066         oparms.desired_access = FILE_READ_ATTRIBUTES;
1067         oparms.disposition = FILE_OPEN;
1068         oparms.create_options = 0;
1069         oparms.fid = &fid;
1070         oparms.reconnect = false;
1071 
1072         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1073 
1074         if (!rc || !err_buf) {
1075                 kfree(utf16_path);
1076                 return -ENOENT;
1077         }
1078         /* open must fail on symlink - reset rc */
1079         rc = 0;
1080         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1081         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1082         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1083         *target_path = cifs_strndup_from_utf16(
1084                                 (char *)symlink->PathBuffer + sub_offset,
1085                                 sub_len, true, cifs_sb->local_nls);
1086         if (!(*target_path)) {
1087                 kfree(utf16_path);
1088                 return -ENOMEM;
1089         }
1090         convert_delimiter(*target_path, '/');
1091         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1092         kfree(utf16_path);
1093         return rc;
1094 }
1095 
1096 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1097                             loff_t offset, loff_t len, bool keep_size)
1098 {
1099         struct inode *inode;
1100         struct cifsInodeInfo *cifsi;
1101         struct cifsFileInfo *cfile = file->private_data;
1102         struct file_zero_data_information fsctl_buf;
1103         long rc;
1104         unsigned int xid;
1105 
1106         xid = get_xid();
1107 
1108         inode = d_inode(cfile->dentry);
1109         cifsi = CIFS_I(inode);
1110 
1111         /* if file not oplocked can't be sure whether asking to extend size */
1112         if (!CIFS_CACHE_READ(cifsi))
1113                 if (keep_size == false)
1114                         return -EOPNOTSUPP;
1115 
1116         /*
1117          * Must check if file sparse since fallocate -z (zero range) assumes
1118          * non-sparse allocation
1119          */
1120         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1121                 return -EOPNOTSUPP;
1122 
1123         /*
1124          * need to make sure we are not asked to extend the file since the SMB3
1125          * fsctl does not change the file size. In the future we could change
1126          * this to zero the first part of the range then set the file size
1127          * which for a non sparse file would zero the newly extended range
1128          */
1129         if (keep_size == false)
1130                 if (i_size_read(inode) < offset + len)
1131                         return -EOPNOTSUPP;
1132 
1133         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1134 
1135         fsctl_buf.FileOffset = cpu_to_le64(offset);
1136         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1137 
1138         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1139                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1140                         true /* is_fctl */, (char *)&fsctl_buf,
1141                         sizeof(struct file_zero_data_information), NULL, NULL);
1142         free_xid(xid);
1143         return rc;
1144 }
1145 
1146 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1147                             loff_t offset, loff_t len)
1148 {
1149         struct inode *inode;
1150         struct cifsInodeInfo *cifsi;
1151         struct cifsFileInfo *cfile = file->private_data;
1152         struct file_zero_data_information fsctl_buf;
1153         long rc;
1154         unsigned int xid;
1155         __u8 set_sparse = 1;
1156 
1157         xid = get_xid();
1158 
1159         inode = d_inode(cfile->dentry);
1160         cifsi = CIFS_I(inode);
1161 
1162         /* Need to make file sparse, if not already, before freeing range. */
1163         /* Consider adding equivalent for compressed since it could also work */
1164         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1165                 return -EOPNOTSUPP;
1166 
1167         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1168 
1169         fsctl_buf.FileOffset = cpu_to_le64(offset);
1170         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1171 
1172         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1173                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1174                         true /* is_fctl */, (char *)&fsctl_buf,
1175                         sizeof(struct file_zero_data_information), NULL, NULL);
1176         free_xid(xid);
1177         return rc;
1178 }
1179 
1180 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1181                             loff_t off, loff_t len, bool keep_size)
1182 {
1183         struct inode *inode;
1184         struct cifsInodeInfo *cifsi;
1185         struct cifsFileInfo *cfile = file->private_data;
1186         long rc = -EOPNOTSUPP;
1187         unsigned int xid;
1188 
1189         xid = get_xid();
1190 
1191         inode = d_inode(cfile->dentry);
1192         cifsi = CIFS_I(inode);
1193 
1194         /* if file not oplocked can't be sure whether asking to extend size */
1195         if (!CIFS_CACHE_READ(cifsi))
1196                 if (keep_size == false)
1197                         return -EOPNOTSUPP;
1198 
1199         /*
1200          * Files are non-sparse by default so falloc may be a no-op
1201          * Must check if file sparse. If not sparse, and not extending
1202          * then no need to do anything since file already allocated
1203          */
1204         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1205                 if (keep_size == true)
1206                         return 0;
1207                 /* check if extending file */
1208                 else if (i_size_read(inode) >= off + len)
1209                         /* not extending file and already not sparse */
1210                         return 0;
1211                 /* BB: in future add else clause to extend file */
1212                 else
1213                         return -EOPNOTSUPP;
1214         }
1215 
1216         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1217                 /*
1218                  * Check if falloc starts within first few pages of file
1219                  * and ends within a few pages of the end of file to
1220                  * ensure that most of file is being forced to be
1221                  * fallocated now. If so then setting whole file sparse
1222                  * ie potentially making a few extra pages at the beginning
1223                  * or end of the file non-sparse via set_sparse is harmless.
1224                  */
1225                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1226                         return -EOPNOTSUPP;
1227 
1228                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1229         }
1230         /* BB: else ... in future add code to extend file and set sparse */
1231 
1232 
1233         free_xid(xid);
1234         return rc;
1235 }
1236 
1237 
1238 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1239                            loff_t off, loff_t len)
1240 {
1241         /* KEEP_SIZE already checked for by do_fallocate */
1242         if (mode & FALLOC_FL_PUNCH_HOLE)
1243                 return smb3_punch_hole(file, tcon, off, len);
1244         else if (mode & FALLOC_FL_ZERO_RANGE) {
1245                 if (mode & FALLOC_FL_KEEP_SIZE)
1246                         return smb3_zero_range(file, tcon, off, len, true);
1247                 return smb3_zero_range(file, tcon, off, len, false);
1248         } else if (mode == FALLOC_FL_KEEP_SIZE)
1249                 return smb3_simple_falloc(file, tcon, off, len, true);
1250         else if (mode == 0)
1251                 return smb3_simple_falloc(file, tcon, off, len, false);
1252 
1253         return -EOPNOTSUPP;
1254 }
1255 
1256 static void
1257 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1258                         struct cifsInodeInfo *cinode, bool set_level2)
1259 {
1260         if (set_level2)
1261                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1262                                                 0, NULL);
1263         else
1264                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1265 }
1266 
1267 static void
1268 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1269                       unsigned int epoch, bool *purge_cache)
1270 {
1271         oplock &= 0xFF;
1272         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1273                 return;
1274         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1275                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1276                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1277                          &cinode->vfs_inode);
1278         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1279                 cinode->oplock = CIFS_CACHE_RW_FLG;
1280                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1281                          &cinode->vfs_inode);
1282         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1283                 cinode->oplock = CIFS_CACHE_READ_FLG;
1284                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1285                          &cinode->vfs_inode);
1286         } else
1287                 cinode->oplock = 0;
1288 }
1289 
1290 static void
1291 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1292                        unsigned int epoch, bool *purge_cache)
1293 {
1294         char message[5] = {0};
1295 
1296         oplock &= 0xFF;
1297         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1298                 return;
1299 
1300         cinode->oplock = 0;
1301         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1302                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1303                 strcat(message, "R");
1304         }
1305         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1306                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1307                 strcat(message, "H");
1308         }
1309         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1310                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1311                 strcat(message, "W");
1312         }
1313         if (!cinode->oplock)
1314                 strcat(message, "None");
1315         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1316                  &cinode->vfs_inode);
1317 }
1318 
1319 static void
1320 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1321                       unsigned int epoch, bool *purge_cache)
1322 {
1323         unsigned int old_oplock = cinode->oplock;
1324 
1325         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1326 
1327         if (purge_cache) {
1328                 *purge_cache = false;
1329                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1330                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1331                             (epoch - cinode->epoch > 0))
1332                                 *purge_cache = true;
1333                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1334                                  (epoch - cinode->epoch > 1))
1335                                 *purge_cache = true;
1336                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1337                                  (epoch - cinode->epoch > 1))
1338                                 *purge_cache = true;
1339                         else if (cinode->oplock == 0 &&
1340                                  (epoch - cinode->epoch > 0))
1341                                 *purge_cache = true;
1342                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1343                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1344                             (epoch - cinode->epoch > 0))
1345                                 *purge_cache = true;
1346                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1347                                  (epoch - cinode->epoch > 1))
1348                                 *purge_cache = true;
1349                 }
1350                 cinode->epoch = epoch;
1351         }
1352 }
1353 
1354 static bool
1355 smb2_is_read_op(__u32 oplock)
1356 {
1357         return oplock == SMB2_OPLOCK_LEVEL_II;
1358 }
1359 
1360 static bool
1361 smb21_is_read_op(__u32 oplock)
1362 {
1363         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1364                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1365 }
1366 
1367 static __le32
1368 map_oplock_to_lease(u8 oplock)
1369 {
1370         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1371                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1372         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1373                 return SMB2_LEASE_READ_CACHING;
1374         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1375                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1376                        SMB2_LEASE_WRITE_CACHING;
1377         return 0;
1378 }
1379 
1380 static char *
1381 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1382 {
1383         struct create_lease *buf;
1384 
1385         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1386         if (!buf)
1387                 return NULL;
1388 
1389         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1390         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1391         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1392 
1393         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1394                                         (struct create_lease, lcontext));
1395         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1396         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1397                                 (struct create_lease, Name));
1398         buf->ccontext.NameLength = cpu_to_le16(4);
1399         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1400         buf->Name[0] = 'R';
1401         buf->Name[1] = 'q';
1402         buf->Name[2] = 'L';
1403         buf->Name[3] = 's';
1404         return (char *)buf;
1405 }
1406 
1407 static char *
1408 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1409 {
1410         struct create_lease_v2 *buf;
1411 
1412         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1413         if (!buf)
1414                 return NULL;
1415 
1416         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1417         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1418         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1419 
1420         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1421                                         (struct create_lease_v2, lcontext));
1422         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1423         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1424                                 (struct create_lease_v2, Name));
1425         buf->ccontext.NameLength = cpu_to_le16(4);
1426         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1427         buf->Name[0] = 'R';
1428         buf->Name[1] = 'q';
1429         buf->Name[2] = 'L';
1430         buf->Name[3] = 's';
1431         return (char *)buf;
1432 }
1433 
1434 static __u8
1435 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1436 {
1437         struct create_lease *lc = (struct create_lease *)buf;
1438 
1439         *epoch = 0; /* not used */
1440         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1441                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1442         return le32_to_cpu(lc->lcontext.LeaseState);
1443 }
1444 
1445 static __u8
1446 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1447 {
1448         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1449 
1450         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1451         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1452                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1453         return le32_to_cpu(lc->lcontext.LeaseState);
1454 }
1455 
1456 static unsigned int
1457 smb2_wp_retry_size(struct inode *inode)
1458 {
1459         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1460                      SMB2_MAX_BUFFER_SIZE);
1461 }
1462 
1463 static bool
1464 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1465 {
1466         return !cfile->invalidHandle;
1467 }
1468 
1469 struct smb_version_operations smb20_operations = {
1470         .compare_fids = smb2_compare_fids,
1471         .setup_request = smb2_setup_request,
1472         .setup_async_request = smb2_setup_async_request,
1473         .check_receive = smb2_check_receive,
1474         .add_credits = smb2_add_credits,
1475         .set_credits = smb2_set_credits,
1476         .get_credits_field = smb2_get_credits_field,
1477         .get_credits = smb2_get_credits,
1478         .wait_mtu_credits = cifs_wait_mtu_credits,
1479         .get_next_mid = smb2_get_next_mid,
1480         .read_data_offset = smb2_read_data_offset,
1481         .read_data_length = smb2_read_data_length,
1482         .map_error = map_smb2_to_linux_error,
1483         .find_mid = smb2_find_mid,
1484         .check_message = smb2_check_message,
1485         .dump_detail = smb2_dump_detail,
1486         .clear_stats = smb2_clear_stats,
1487         .print_stats = smb2_print_stats,
1488         .is_oplock_break = smb2_is_valid_oplock_break,
1489         .downgrade_oplock = smb2_downgrade_oplock,
1490         .need_neg = smb2_need_neg,
1491         .negotiate = smb2_negotiate,
1492         .negotiate_wsize = smb2_negotiate_wsize,
1493         .negotiate_rsize = smb2_negotiate_rsize,
1494         .sess_setup = SMB2_sess_setup,
1495         .logoff = SMB2_logoff,
1496         .tree_connect = SMB2_tcon,
1497         .tree_disconnect = SMB2_tdis,
1498         .qfs_tcon = smb2_qfs_tcon,
1499         .is_path_accessible = smb2_is_path_accessible,
1500         .can_echo = smb2_can_echo,
1501         .echo = SMB2_echo,
1502         .query_path_info = smb2_query_path_info,
1503         .get_srv_inum = smb2_get_srv_inum,
1504         .query_file_info = smb2_query_file_info,
1505         .set_path_size = smb2_set_path_size,
1506         .set_file_size = smb2_set_file_size,
1507         .set_file_info = smb2_set_file_info,
1508         .set_compression = smb2_set_compression,
1509         .mkdir = smb2_mkdir,
1510         .mkdir_setinfo = smb2_mkdir_setinfo,
1511         .rmdir = smb2_rmdir,
1512         .unlink = smb2_unlink,
1513         .rename = smb2_rename_path,
1514         .create_hardlink = smb2_create_hardlink,
1515         .query_symlink = smb2_query_symlink,
1516         .open = smb2_open_file,
1517         .set_fid = smb2_set_fid,
1518         .close = smb2_close_file,
1519         .flush = smb2_flush_file,
1520         .async_readv = smb2_async_readv,
1521         .async_writev = smb2_async_writev,
1522         .sync_read = smb2_sync_read,
1523         .sync_write = smb2_sync_write,
1524         .query_dir_first = smb2_query_dir_first,
1525         .query_dir_next = smb2_query_dir_next,
1526         .close_dir = smb2_close_dir,
1527         .calc_smb_size = smb2_calc_size,
1528         .is_status_pending = smb2_is_status_pending,
1529         .oplock_response = smb2_oplock_response,
1530         .queryfs = smb2_queryfs,
1531         .mand_lock = smb2_mand_lock,
1532         .mand_unlock_range = smb2_unlock_range,
1533         .push_mand_locks = smb2_push_mandatory_locks,
1534         .get_lease_key = smb2_get_lease_key,
1535         .set_lease_key = smb2_set_lease_key,
1536         .new_lease_key = smb2_new_lease_key,
1537         .calc_signature = smb2_calc_signature,
1538         .is_read_op = smb2_is_read_op,
1539         .set_oplock_level = smb2_set_oplock_level,
1540         .create_lease_buf = smb2_create_lease_buf,
1541         .parse_lease_buf = smb2_parse_lease_buf,
1542         .clone_range = smb2_clone_range,
1543         .wp_retry_size = smb2_wp_retry_size,
1544         .dir_needs_close = smb2_dir_needs_close,
1545 };
1546 
1547 struct smb_version_operations smb21_operations = {
1548         .compare_fids = smb2_compare_fids,
1549         .setup_request = smb2_setup_request,
1550         .setup_async_request = smb2_setup_async_request,
1551         .check_receive = smb2_check_receive,
1552         .add_credits = smb2_add_credits,
1553         .set_credits = smb2_set_credits,
1554         .get_credits_field = smb2_get_credits_field,
1555         .get_credits = smb2_get_credits,
1556         .wait_mtu_credits = smb2_wait_mtu_credits,
1557         .get_next_mid = smb2_get_next_mid,
1558         .read_data_offset = smb2_read_data_offset,
1559         .read_data_length = smb2_read_data_length,
1560         .map_error = map_smb2_to_linux_error,
1561         .find_mid = smb2_find_mid,
1562         .check_message = smb2_check_message,
1563         .dump_detail = smb2_dump_detail,
1564         .clear_stats = smb2_clear_stats,
1565         .print_stats = smb2_print_stats,
1566         .is_oplock_break = smb2_is_valid_oplock_break,
1567         .downgrade_oplock = smb2_downgrade_oplock,
1568         .need_neg = smb2_need_neg,
1569         .negotiate = smb2_negotiate,
1570         .negotiate_wsize = smb2_negotiate_wsize,
1571         .negotiate_rsize = smb2_negotiate_rsize,
1572         .sess_setup = SMB2_sess_setup,
1573         .logoff = SMB2_logoff,
1574         .tree_connect = SMB2_tcon,
1575         .tree_disconnect = SMB2_tdis,
1576         .qfs_tcon = smb2_qfs_tcon,
1577         .is_path_accessible = smb2_is_path_accessible,
1578         .can_echo = smb2_can_echo,
1579         .echo = SMB2_echo,
1580         .query_path_info = smb2_query_path_info,
1581         .get_srv_inum = smb2_get_srv_inum,
1582         .query_file_info = smb2_query_file_info,
1583         .set_path_size = smb2_set_path_size,
1584         .set_file_size = smb2_set_file_size,
1585         .set_file_info = smb2_set_file_info,
1586         .set_compression = smb2_set_compression,
1587         .mkdir = smb2_mkdir,
1588         .mkdir_setinfo = smb2_mkdir_setinfo,
1589         .rmdir = smb2_rmdir,
1590         .unlink = smb2_unlink,
1591         .rename = smb2_rename_path,
1592         .create_hardlink = smb2_create_hardlink,
1593         .query_symlink = smb2_query_symlink,
1594         .query_mf_symlink = smb3_query_mf_symlink,
1595         .create_mf_symlink = smb3_create_mf_symlink,
1596         .open = smb2_open_file,
1597         .set_fid = smb2_set_fid,
1598         .close = smb2_close_file,
1599         .flush = smb2_flush_file,
1600         .async_readv = smb2_async_readv,
1601         .async_writev = smb2_async_writev,
1602         .sync_read = smb2_sync_read,
1603         .sync_write = smb2_sync_write,
1604         .query_dir_first = smb2_query_dir_first,
1605         .query_dir_next = smb2_query_dir_next,
1606         .close_dir = smb2_close_dir,
1607         .calc_smb_size = smb2_calc_size,
1608         .is_status_pending = smb2_is_status_pending,
1609         .oplock_response = smb2_oplock_response,
1610         .queryfs = smb2_queryfs,
1611         .mand_lock = smb2_mand_lock,
1612         .mand_unlock_range = smb2_unlock_range,
1613         .push_mand_locks = smb2_push_mandatory_locks,
1614         .get_lease_key = smb2_get_lease_key,
1615         .set_lease_key = smb2_set_lease_key,
1616         .new_lease_key = smb2_new_lease_key,
1617         .calc_signature = smb2_calc_signature,
1618         .is_read_op = smb21_is_read_op,
1619         .set_oplock_level = smb21_set_oplock_level,
1620         .create_lease_buf = smb2_create_lease_buf,
1621         .parse_lease_buf = smb2_parse_lease_buf,
1622         .clone_range = smb2_clone_range,
1623         .wp_retry_size = smb2_wp_retry_size,
1624         .dir_needs_close = smb2_dir_needs_close,
1625 };
1626 
1627 struct smb_version_operations smb30_operations = {
1628         .compare_fids = smb2_compare_fids,
1629         .setup_request = smb2_setup_request,
1630         .setup_async_request = smb2_setup_async_request,
1631         .check_receive = smb2_check_receive,
1632         .add_credits = smb2_add_credits,
1633         .set_credits = smb2_set_credits,
1634         .get_credits_field = smb2_get_credits_field,
1635         .get_credits = smb2_get_credits,
1636         .wait_mtu_credits = smb2_wait_mtu_credits,
1637         .get_next_mid = smb2_get_next_mid,
1638         .read_data_offset = smb2_read_data_offset,
1639         .read_data_length = smb2_read_data_length,
1640         .map_error = map_smb2_to_linux_error,
1641         .find_mid = smb2_find_mid,
1642         .check_message = smb2_check_message,
1643         .dump_detail = smb2_dump_detail,
1644         .clear_stats = smb2_clear_stats,
1645         .print_stats = smb2_print_stats,
1646         .dump_share_caps = smb2_dump_share_caps,
1647         .is_oplock_break = smb2_is_valid_oplock_break,
1648         .downgrade_oplock = smb2_downgrade_oplock,
1649         .need_neg = smb2_need_neg,
1650         .negotiate = smb2_negotiate,
1651         .negotiate_wsize = smb2_negotiate_wsize,
1652         .negotiate_rsize = smb2_negotiate_rsize,
1653         .sess_setup = SMB2_sess_setup,
1654         .logoff = SMB2_logoff,
1655         .tree_connect = SMB2_tcon,
1656         .tree_disconnect = SMB2_tdis,
1657         .qfs_tcon = smb3_qfs_tcon,
1658         .is_path_accessible = smb2_is_path_accessible,
1659         .can_echo = smb2_can_echo,
1660         .echo = SMB2_echo,
1661         .query_path_info = smb2_query_path_info,
1662         .get_srv_inum = smb2_get_srv_inum,
1663         .query_file_info = smb2_query_file_info,
1664         .set_path_size = smb2_set_path_size,
1665         .set_file_size = smb2_set_file_size,
1666         .set_file_info = smb2_set_file_info,
1667         .set_compression = smb2_set_compression,
1668         .mkdir = smb2_mkdir,
1669         .mkdir_setinfo = smb2_mkdir_setinfo,
1670         .rmdir = smb2_rmdir,
1671         .unlink = smb2_unlink,
1672         .rename = smb2_rename_path,
1673         .create_hardlink = smb2_create_hardlink,
1674         .query_symlink = smb2_query_symlink,
1675         .query_mf_symlink = smb3_query_mf_symlink,
1676         .create_mf_symlink = smb3_create_mf_symlink,
1677         .open = smb2_open_file,
1678         .set_fid = smb2_set_fid,
1679         .close = smb2_close_file,
1680         .flush = smb2_flush_file,
1681         .async_readv = smb2_async_readv,
1682         .async_writev = smb2_async_writev,
1683         .sync_read = smb2_sync_read,
1684         .sync_write = smb2_sync_write,
1685         .query_dir_first = smb2_query_dir_first,
1686         .query_dir_next = smb2_query_dir_next,
1687         .close_dir = smb2_close_dir,
1688         .calc_smb_size = smb2_calc_size,
1689         .is_status_pending = smb2_is_status_pending,
1690         .oplock_response = smb2_oplock_response,
1691         .queryfs = smb2_queryfs,
1692         .mand_lock = smb2_mand_lock,
1693         .mand_unlock_range = smb2_unlock_range,
1694         .push_mand_locks = smb2_push_mandatory_locks,
1695         .get_lease_key = smb2_get_lease_key,
1696         .set_lease_key = smb2_set_lease_key,
1697         .new_lease_key = smb2_new_lease_key,
1698         .generate_signingkey = generate_smb3signingkey,
1699         .calc_signature = smb3_calc_signature,
1700         .set_integrity  = smb3_set_integrity,
1701         .is_read_op = smb21_is_read_op,
1702         .set_oplock_level = smb3_set_oplock_level,
1703         .create_lease_buf = smb3_create_lease_buf,
1704         .parse_lease_buf = smb3_parse_lease_buf,
1705         .clone_range = smb2_clone_range,
1706         .validate_negotiate = smb3_validate_negotiate,
1707         .wp_retry_size = smb2_wp_retry_size,
1708         .dir_needs_close = smb2_dir_needs_close,
1709         .fallocate = smb3_fallocate,
1710 };
1711 
1712 #ifdef CONFIG_CIFS_SMB311
1713 struct smb_version_operations smb311_operations = {
1714         .compare_fids = smb2_compare_fids,
1715         .setup_request = smb2_setup_request,
1716         .setup_async_request = smb2_setup_async_request,
1717         .check_receive = smb2_check_receive,
1718         .add_credits = smb2_add_credits,
1719         .set_credits = smb2_set_credits,
1720         .get_credits_field = smb2_get_credits_field,
1721         .get_credits = smb2_get_credits,
1722         .wait_mtu_credits = smb2_wait_mtu_credits,
1723         .get_next_mid = smb2_get_next_mid,
1724         .read_data_offset = smb2_read_data_offset,
1725         .read_data_length = smb2_read_data_length,
1726         .map_error = map_smb2_to_linux_error,
1727         .find_mid = smb2_find_mid,
1728         .check_message = smb2_check_message,
1729         .dump_detail = smb2_dump_detail,
1730         .clear_stats = smb2_clear_stats,
1731         .print_stats = smb2_print_stats,
1732         .dump_share_caps = smb2_dump_share_caps,
1733         .is_oplock_break = smb2_is_valid_oplock_break,
1734         .downgrade_oplock = smb2_downgrade_oplock,
1735         .need_neg = smb2_need_neg,
1736         .negotiate = smb2_negotiate,
1737         .negotiate_wsize = smb2_negotiate_wsize,
1738         .negotiate_rsize = smb2_negotiate_rsize,
1739         .sess_setup = SMB2_sess_setup,
1740         .logoff = SMB2_logoff,
1741         .tree_connect = SMB2_tcon,
1742         .tree_disconnect = SMB2_tdis,
1743         .qfs_tcon = smb3_qfs_tcon,
1744         .is_path_accessible = smb2_is_path_accessible,
1745         .can_echo = smb2_can_echo,
1746         .echo = SMB2_echo,
1747         .query_path_info = smb2_query_path_info,
1748         .get_srv_inum = smb2_get_srv_inum,
1749         .query_file_info = smb2_query_file_info,
1750         .set_path_size = smb2_set_path_size,
1751         .set_file_size = smb2_set_file_size,
1752         .set_file_info = smb2_set_file_info,
1753         .set_compression = smb2_set_compression,
1754         .mkdir = smb2_mkdir,
1755         .mkdir_setinfo = smb2_mkdir_setinfo,
1756         .rmdir = smb2_rmdir,
1757         .unlink = smb2_unlink,
1758         .rename = smb2_rename_path,
1759         .create_hardlink = smb2_create_hardlink,
1760         .query_symlink = smb2_query_symlink,
1761         .query_mf_symlink = smb3_query_mf_symlink,
1762         .create_mf_symlink = smb3_create_mf_symlink,
1763         .open = smb2_open_file,
1764         .set_fid = smb2_set_fid,
1765         .close = smb2_close_file,
1766         .flush = smb2_flush_file,
1767         .async_readv = smb2_async_readv,
1768         .async_writev = smb2_async_writev,
1769         .sync_read = smb2_sync_read,
1770         .sync_write = smb2_sync_write,
1771         .query_dir_first = smb2_query_dir_first,
1772         .query_dir_next = smb2_query_dir_next,
1773         .close_dir = smb2_close_dir,
1774         .calc_smb_size = smb2_calc_size,
1775         .is_status_pending = smb2_is_status_pending,
1776         .oplock_response = smb2_oplock_response,
1777         .queryfs = smb2_queryfs,
1778         .mand_lock = smb2_mand_lock,
1779         .mand_unlock_range = smb2_unlock_range,
1780         .push_mand_locks = smb2_push_mandatory_locks,
1781         .get_lease_key = smb2_get_lease_key,
1782         .set_lease_key = smb2_set_lease_key,
1783         .new_lease_key = smb2_new_lease_key,
1784         .generate_signingkey = generate_smb3signingkey,
1785         .calc_signature = smb3_calc_signature,
1786         .set_integrity  = smb3_set_integrity,
1787         .is_read_op = smb21_is_read_op,
1788         .set_oplock_level = smb3_set_oplock_level,
1789         .create_lease_buf = smb3_create_lease_buf,
1790         .parse_lease_buf = smb3_parse_lease_buf,
1791         .clone_range = smb2_clone_range,
1792         .duplicate_extents = smb2_duplicate_extents,
1793 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1794         .wp_retry_size = smb2_wp_retry_size,
1795         .dir_needs_close = smb2_dir_needs_close,
1796         .fallocate = smb3_fallocate,
1797 };
1798 #endif /* CIFS_SMB311 */
1799 
1800 struct smb_version_values smb20_values = {
1801         .version_string = SMB20_VERSION_STRING,
1802         .protocol_id = SMB20_PROT_ID,
1803         .req_capabilities = 0, /* MBZ */
1804         .large_lock_type = 0,
1805         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1806         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1807         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1808         .header_size = sizeof(struct smb2_hdr),
1809         .max_header_size = MAX_SMB2_HDR_SIZE,
1810         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1811         .lock_cmd = SMB2_LOCK,
1812         .cap_unix = 0,
1813         .cap_nt_find = SMB2_NT_FIND,
1814         .cap_large_files = SMB2_LARGE_FILES,
1815         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1816         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1817         .create_lease_size = sizeof(struct create_lease),
1818 };
1819 
1820 struct smb_version_values smb21_values = {
1821         .version_string = SMB21_VERSION_STRING,
1822         .protocol_id = SMB21_PROT_ID,
1823         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1824         .large_lock_type = 0,
1825         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1826         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1827         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1828         .header_size = sizeof(struct smb2_hdr),
1829         .max_header_size = MAX_SMB2_HDR_SIZE,
1830         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1831         .lock_cmd = SMB2_LOCK,
1832         .cap_unix = 0,
1833         .cap_nt_find = SMB2_NT_FIND,
1834         .cap_large_files = SMB2_LARGE_FILES,
1835         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1836         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1837         .create_lease_size = sizeof(struct create_lease),
1838 };
1839 
1840 struct smb_version_values smb30_values = {
1841         .version_string = SMB30_VERSION_STRING,
1842         .protocol_id = SMB30_PROT_ID,
1843         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1844         .large_lock_type = 0,
1845         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1846         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1847         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1848         .header_size = sizeof(struct smb2_hdr),
1849         .max_header_size = MAX_SMB2_HDR_SIZE,
1850         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1851         .lock_cmd = SMB2_LOCK,
1852         .cap_unix = 0,
1853         .cap_nt_find = SMB2_NT_FIND,
1854         .cap_large_files = SMB2_LARGE_FILES,
1855         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1856         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1857         .create_lease_size = sizeof(struct create_lease_v2),
1858 };
1859 
1860 struct smb_version_values smb302_values = {
1861         .version_string = SMB302_VERSION_STRING,
1862         .protocol_id = SMB302_PROT_ID,
1863         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1864         .large_lock_type = 0,
1865         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1866         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1867         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1868         .header_size = sizeof(struct smb2_hdr),
1869         .max_header_size = MAX_SMB2_HDR_SIZE,
1870         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1871         .lock_cmd = SMB2_LOCK,
1872         .cap_unix = 0,
1873         .cap_nt_find = SMB2_NT_FIND,
1874         .cap_large_files = SMB2_LARGE_FILES,
1875         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1876         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1877         .create_lease_size = sizeof(struct create_lease_v2),
1878 };
1879 
1880 #ifdef CONFIG_CIFS_SMB311
1881 struct smb_version_values smb311_values = {
1882         .version_string = SMB311_VERSION_STRING,
1883         .protocol_id = SMB311_PROT_ID,
1884         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1885         .large_lock_type = 0,
1886         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1887         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1888         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1889         .header_size = sizeof(struct smb2_hdr),
1890         .max_header_size = MAX_SMB2_HDR_SIZE,
1891         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1892         .lock_cmd = SMB2_LOCK,
1893         .cap_unix = 0,
1894         .cap_nt_find = SMB2_NT_FIND,
1895         .cap_large_files = SMB2_LARGE_FILES,
1896         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1897         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1898         .create_lease_size = sizeof(struct create_lease_v2),
1899 };
1900 #endif /* SMB311 */
1901 

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