2 * SMB2 version specific operations
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
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.
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.
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
20 #include <linux/pagemap.h>
23 #include "smb2proto.h"
24 #include "cifsproto.h"
25 #include "cifs_debug.h"
28 change_conf(struct TCP_Server_Info *server)
30 server->credits += server->echo_credits + server->oplock_credits;
31 server->oplock_credits = server->echo_credits = 0;
32 switch (server->credits) {
36 server->echoes = false;
37 server->oplocks = false;
38 cERROR(1, "disabling echoes and oplocks");
41 server->echoes = true;
42 server->oplocks = false;
43 server->echo_credits = 1;
44 cFYI(1, "disabling oplocks");
47 server->echoes = true;
48 server->oplocks = true;
49 server->echo_credits = 1;
50 server->oplock_credits = 1;
52 server->credits -= server->echo_credits + server->oplock_credits;
57 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
61 spin_lock(&server->req_lock);
62 val = server->ops->get_credits_field(server, optype);
65 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
66 rc = change_conf(server);
67 spin_unlock(&server->req_lock);
68 wake_up(&server->request_q);
70 cifs_reconnect(server);
74 smb2_set_credits(struct TCP_Server_Info *server, const int val)
76 spin_lock(&server->req_lock);
77 server->credits = val;
78 spin_unlock(&server->req_lock);
82 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
86 return &server->echo_credits;
88 return &server->oplock_credits;
90 return &server->credits;
95 smb2_get_credits(struct mid_q_entry *mid)
97 return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
101 smb2_get_next_mid(struct TCP_Server_Info *server)
104 /* for SMB2 we need the current value */
105 spin_lock(&GlobalMid_Lock);
106 mid = server->CurrentMid++;
107 spin_unlock(&GlobalMid_Lock);
111 static struct mid_q_entry *
112 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
114 struct mid_q_entry *mid;
115 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
117 spin_lock(&GlobalMid_Lock);
118 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
119 if ((mid->mid == hdr->MessageId) &&
120 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
121 (mid->command == hdr->Command)) {
122 spin_unlock(&GlobalMid_Lock);
126 spin_unlock(&GlobalMid_Lock);
131 smb2_dump_detail(void *buf)
133 #ifdef CONFIG_CIFS_DEBUG2
134 struct smb2_hdr *smb = (struct smb2_hdr *)buf;
136 cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d",
137 smb->Command, smb->Status, smb->Flags, smb->MessageId,
139 cERROR(1, "smb buf %p len %u", smb, smb2_calc_size(smb));
144 smb2_need_neg(struct TCP_Server_Info *server)
146 return server->max_read == 0;
150 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
153 ses->server->CurrentMid = 0;
154 rc = SMB2_negotiate(xid, ses);
155 /* BB we probably don't need to retry with modern servers */
162 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
164 struct TCP_Server_Info *server = tcon->ses->server;
167 /* start with specified wsize, or default */
168 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
169 wsize = min_t(unsigned int, wsize, server->max_write);
171 * limit write size to 2 ** 16, because we don't support multicredit
174 wsize = min_t(unsigned int, wsize, 2 << 15);
176 /* limit to the amount that we can kmap at once */
177 wsize = min_t(unsigned int, wsize, CIFS_KMAP_SIZE_LIMIT);
183 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
185 struct TCP_Server_Info *server = tcon->ses->server;
188 /* start with specified rsize, or default */
189 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
190 rsize = min_t(unsigned int, rsize, server->max_read);
192 * limit write size to 2 ** 16, because we don't support multicredit
195 rsize = min_t(unsigned int, rsize, 2 << 15);
197 /* limit to the amount that we can kmap at once */
198 rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT);
204 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
205 struct cifs_sb_info *cifs_sb, const char *full_path)
208 __u64 persistent_fid, volatile_fid;
211 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
215 rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
216 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, NULL);
222 rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
228 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
229 struct cifs_sb_info *cifs_sb, const char *full_path,
230 u64 *uniqueid, FILE_ALL_INFO *data)
232 *uniqueid = le64_to_cpu(data->IndexNumber);
237 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
238 struct cifs_fid *fid, FILE_ALL_INFO *data)
241 struct smb2_file_all_info *smb2_data;
243 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
245 if (smb2_data == NULL)
248 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
251 move_smb2_info_to_cifs(data, smb2_data);
257 smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
258 struct cifs_tcon *tcon)
260 int pplen = vol->prepath ? strlen(vol->prepath) : 0;
261 char *full_path = NULL;
263 /* if no prefix path, simply set path to the root of share to "" */
265 full_path = kzalloc(2, GFP_KERNEL);
269 cERROR(1, "prefixpath is not supported for SMB2 now");
274 smb2_can_echo(struct TCP_Server_Info *server)
276 return server->echoes;
280 smb2_clear_stats(struct cifs_tcon *tcon)
282 #ifdef CONFIG_CIFS_STATS
284 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
285 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
286 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
292 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
294 #ifdef CONFIG_CIFS_STATS
295 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
296 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
297 seq_printf(m, "\nNegotiates: %d sent %d failed",
298 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
299 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
300 seq_printf(m, "\nSessionSetups: %d sent %d failed",
301 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
302 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
303 #define SMB2LOGOFF 0x0002 /* trivial request/resp */
304 seq_printf(m, "\nLogoffs: %d sent %d failed",
305 atomic_read(&sent[SMB2_LOGOFF_HE]),
306 atomic_read(&failed[SMB2_LOGOFF_HE]));
307 seq_printf(m, "\nTreeConnects: %d sent %d failed",
308 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
309 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
310 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
311 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
312 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
313 seq_printf(m, "\nCreates: %d sent %d failed",
314 atomic_read(&sent[SMB2_CREATE_HE]),
315 atomic_read(&failed[SMB2_CREATE_HE]));
316 seq_printf(m, "\nCloses: %d sent %d failed",
317 atomic_read(&sent[SMB2_CLOSE_HE]),
318 atomic_read(&failed[SMB2_CLOSE_HE]));
319 seq_printf(m, "\nFlushes: %d sent %d failed",
320 atomic_read(&sent[SMB2_FLUSH_HE]),
321 atomic_read(&failed[SMB2_FLUSH_HE]));
322 seq_printf(m, "\nReads: %d sent %d failed",
323 atomic_read(&sent[SMB2_READ_HE]),
324 atomic_read(&failed[SMB2_READ_HE]));
325 seq_printf(m, "\nWrites: %d sent %d failed",
326 atomic_read(&sent[SMB2_WRITE_HE]),
327 atomic_read(&failed[SMB2_WRITE_HE]));
328 seq_printf(m, "\nLocks: %d sent %d failed",
329 atomic_read(&sent[SMB2_LOCK_HE]),
330 atomic_read(&failed[SMB2_LOCK_HE]));
331 seq_printf(m, "\nIOCTLs: %d sent %d failed",
332 atomic_read(&sent[SMB2_IOCTL_HE]),
333 atomic_read(&failed[SMB2_IOCTL_HE]));
334 seq_printf(m, "\nCancels: %d sent %d failed",
335 atomic_read(&sent[SMB2_CANCEL_HE]),
336 atomic_read(&failed[SMB2_CANCEL_HE]));
337 seq_printf(m, "\nEchos: %d sent %d failed",
338 atomic_read(&sent[SMB2_ECHO_HE]),
339 atomic_read(&failed[SMB2_ECHO_HE]));
340 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
341 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
342 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
343 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
344 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
345 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
346 seq_printf(m, "\nQueryInfos: %d sent %d failed",
347 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
348 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
349 seq_printf(m, "\nSetInfos: %d sent %d failed",
350 atomic_read(&sent[SMB2_SET_INFO_HE]),
351 atomic_read(&failed[SMB2_SET_INFO_HE]));
352 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
353 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
354 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
359 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
361 /* struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); */
362 cfile->fid.persistent_fid = fid->persistent_fid;
363 cfile->fid.volatile_fid = fid->volatile_fid;
364 /* cifs_set_oplock_level(cinode, oplock); */
365 /* cinode->can_cache_brlcks = cinode->clientCanCacheAll; */
369 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
370 struct cifs_fid *fid)
372 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
376 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
377 struct cifs_fid *fid)
379 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
383 smb2_read_data_offset(char *buf)
385 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
386 return rsp->DataOffset;
390 smb2_read_data_length(char *buf)
392 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
393 return le32_to_cpu(rsp->DataLength);
398 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
399 struct cifs_io_parms *parms, unsigned int *bytes_read,
400 char **buf, int *buf_type)
402 parms->persistent_fid = cfile->fid.persistent_fid;
403 parms->volatile_fid = cfile->fid.volatile_fid;
404 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
408 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
409 struct cifs_io_parms *parms, unsigned int *written,
410 struct kvec *iov, unsigned long nr_segs)
413 parms->persistent_fid = cfile->fid.persistent_fid;
414 parms->volatile_fid = cfile->fid.volatile_fid;
415 return SMB2_write(xid, parms, written, iov, nr_segs);
419 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
420 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
422 __le64 eof = cpu_to_le64(size);
423 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
424 cfile->fid.volatile_fid, cfile->pid, &eof);
427 struct smb_version_operations smb21_operations = {
428 .setup_request = smb2_setup_request,
429 .setup_async_request = smb2_setup_async_request,
430 .check_receive = smb2_check_receive,
431 .add_credits = smb2_add_credits,
432 .set_credits = smb2_set_credits,
433 .get_credits_field = smb2_get_credits_field,
434 .get_credits = smb2_get_credits,
435 .get_next_mid = smb2_get_next_mid,
436 .read_data_offset = smb2_read_data_offset,
437 .read_data_length = smb2_read_data_length,
438 .map_error = map_smb2_to_linux_error,
439 .find_mid = smb2_find_mid,
440 .check_message = smb2_check_message,
441 .dump_detail = smb2_dump_detail,
442 .clear_stats = smb2_clear_stats,
443 .print_stats = smb2_print_stats,
444 .need_neg = smb2_need_neg,
445 .negotiate = smb2_negotiate,
446 .negotiate_wsize = smb2_negotiate_wsize,
447 .negotiate_rsize = smb2_negotiate_rsize,
448 .sess_setup = SMB2_sess_setup,
449 .logoff = SMB2_logoff,
450 .tree_connect = SMB2_tcon,
451 .tree_disconnect = SMB2_tdis,
452 .is_path_accessible = smb2_is_path_accessible,
453 .can_echo = smb2_can_echo,
455 .query_path_info = smb2_query_path_info,
456 .get_srv_inum = smb2_get_srv_inum,
457 .query_file_info = smb2_query_file_info,
458 .set_path_size = smb2_set_path_size,
459 .set_file_size = smb2_set_file_size,
460 .set_file_info = smb2_set_file_info,
461 .build_path_to_root = smb2_build_path_to_root,
463 .mkdir_setinfo = smb2_mkdir_setinfo,
465 .unlink = smb2_unlink,
466 .rename = smb2_rename_path,
467 .create_hardlink = smb2_create_hardlink,
468 .open = smb2_open_file,
469 .set_fid = smb2_set_fid,
470 .close = smb2_close_file,
471 .flush = smb2_flush_file,
472 .async_readv = smb2_async_readv,
473 .async_writev = smb2_async_writev,
474 .sync_read = smb2_sync_read,
475 .sync_write = smb2_sync_write,
478 struct smb_version_values smb21_values = {
479 .version_string = SMB21_VERSION_STRING,
480 .header_size = sizeof(struct smb2_hdr),
481 .max_header_size = MAX_SMB2_HDR_SIZE,
482 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
483 .lock_cmd = SMB2_LOCK,
485 .cap_nt_find = SMB2_NT_FIND,
486 .cap_large_files = SMB2_LARGE_FILES,