Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 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 | |
Pavel Shilovsky | 3a3bab5 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 20 | #include <linux/pagemap.h> |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 21 | #include "cifsglob.h" |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 22 | #include "smb2pdu.h" |
| 23 | #include "smb2proto.h" |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 24 | #include "cifsproto.h" |
| 25 | #include "cifs_debug.h" |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 26 | #include "smb2status.h" |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 27 | |
| 28 | static int |
| 29 | change_conf(struct TCP_Server_Info *server) |
| 30 | { |
| 31 | server->credits += server->echo_credits + server->oplock_credits; |
| 32 | server->oplock_credits = server->echo_credits = 0; |
| 33 | switch (server->credits) { |
| 34 | case 0: |
| 35 | return -1; |
| 36 | case 1: |
| 37 | server->echoes = false; |
| 38 | server->oplocks = false; |
| 39 | cERROR(1, "disabling echoes and oplocks"); |
| 40 | break; |
| 41 | case 2: |
| 42 | server->echoes = true; |
| 43 | server->oplocks = false; |
| 44 | server->echo_credits = 1; |
| 45 | cFYI(1, "disabling oplocks"); |
| 46 | break; |
| 47 | default: |
| 48 | server->echoes = true; |
| 49 | server->oplocks = true; |
| 50 | server->echo_credits = 1; |
| 51 | server->oplock_credits = 1; |
| 52 | } |
| 53 | server->credits -= server->echo_credits + server->oplock_credits; |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | static void |
| 58 | smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add, |
| 59 | const int optype) |
| 60 | { |
| 61 | int *val, rc = 0; |
| 62 | spin_lock(&server->req_lock); |
| 63 | val = server->ops->get_credits_field(server, optype); |
| 64 | *val += add; |
| 65 | server->in_flight--; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 66 | if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP) |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 67 | rc = change_conf(server); |
Pavel Shilovsky | 983c88a | 2012-09-18 16:20:33 -0700 | [diff] [blame^] | 68 | /* |
| 69 | * Sometimes server returns 0 credits on oplock break ack - we need to |
| 70 | * rebalance credits in this case. |
| 71 | */ |
| 72 | else if (server->in_flight > 0 && server->oplock_credits == 0 && |
| 73 | server->oplocks) { |
| 74 | if (server->credits > 1) { |
| 75 | server->credits--; |
| 76 | server->oplock_credits++; |
| 77 | } |
| 78 | } |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 79 | spin_unlock(&server->req_lock); |
| 80 | wake_up(&server->request_q); |
| 81 | if (rc) |
| 82 | cifs_reconnect(server); |
| 83 | } |
| 84 | |
| 85 | static void |
| 86 | smb2_set_credits(struct TCP_Server_Info *server, const int val) |
| 87 | { |
| 88 | spin_lock(&server->req_lock); |
| 89 | server->credits = val; |
| 90 | spin_unlock(&server->req_lock); |
| 91 | } |
| 92 | |
| 93 | static int * |
| 94 | smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) |
| 95 | { |
| 96 | switch (optype) { |
| 97 | case CIFS_ECHO_OP: |
| 98 | return &server->echo_credits; |
| 99 | case CIFS_OBREAK_OP: |
| 100 | return &server->oplock_credits; |
| 101 | default: |
| 102 | return &server->credits; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | static unsigned int |
| 107 | smb2_get_credits(struct mid_q_entry *mid) |
| 108 | { |
| 109 | return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest); |
| 110 | } |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 111 | |
| 112 | static __u64 |
| 113 | smb2_get_next_mid(struct TCP_Server_Info *server) |
| 114 | { |
| 115 | __u64 mid; |
| 116 | /* for SMB2 we need the current value */ |
| 117 | spin_lock(&GlobalMid_Lock); |
| 118 | mid = server->CurrentMid++; |
| 119 | spin_unlock(&GlobalMid_Lock); |
| 120 | return mid; |
| 121 | } |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 122 | |
Pavel Shilovsky | 093b2bd | 2011-06-08 15:51:07 +0400 | [diff] [blame] | 123 | static struct mid_q_entry * |
| 124 | smb2_find_mid(struct TCP_Server_Info *server, char *buf) |
| 125 | { |
| 126 | struct mid_q_entry *mid; |
| 127 | struct smb2_hdr *hdr = (struct smb2_hdr *)buf; |
| 128 | |
| 129 | spin_lock(&GlobalMid_Lock); |
| 130 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { |
| 131 | if ((mid->mid == hdr->MessageId) && |
| 132 | (mid->mid_state == MID_REQUEST_SUBMITTED) && |
| 133 | (mid->command == hdr->Command)) { |
| 134 | spin_unlock(&GlobalMid_Lock); |
| 135 | return mid; |
| 136 | } |
| 137 | } |
| 138 | spin_unlock(&GlobalMid_Lock); |
| 139 | return NULL; |
| 140 | } |
| 141 | |
| 142 | static void |
| 143 | smb2_dump_detail(void *buf) |
| 144 | { |
| 145 | #ifdef CONFIG_CIFS_DEBUG2 |
| 146 | struct smb2_hdr *smb = (struct smb2_hdr *)buf; |
| 147 | |
| 148 | cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d", |
| 149 | smb->Command, smb->Status, smb->Flags, smb->MessageId, |
| 150 | smb->ProcessId); |
| 151 | cERROR(1, "smb buf %p len %u", smb, smb2_calc_size(smb)); |
| 152 | #endif |
| 153 | } |
| 154 | |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 155 | static bool |
| 156 | smb2_need_neg(struct TCP_Server_Info *server) |
| 157 | { |
| 158 | return server->max_read == 0; |
| 159 | } |
| 160 | |
| 161 | static int |
| 162 | smb2_negotiate(const unsigned int xid, struct cifs_ses *ses) |
| 163 | { |
| 164 | int rc; |
| 165 | ses->server->CurrentMid = 0; |
| 166 | rc = SMB2_negotiate(xid, ses); |
| 167 | /* BB we probably don't need to retry with modern servers */ |
| 168 | if (rc == -EAGAIN) |
| 169 | rc = -EHOSTDOWN; |
| 170 | return rc; |
| 171 | } |
| 172 | |
Pavel Shilovsky | 3a3bab5 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 173 | static unsigned int |
| 174 | smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) |
| 175 | { |
| 176 | struct TCP_Server_Info *server = tcon->ses->server; |
| 177 | unsigned int wsize; |
| 178 | |
| 179 | /* start with specified wsize, or default */ |
| 180 | wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE; |
| 181 | wsize = min_t(unsigned int, wsize, server->max_write); |
| 182 | /* |
| 183 | * limit write size to 2 ** 16, because we don't support multicredit |
| 184 | * requests now. |
| 185 | */ |
| 186 | wsize = min_t(unsigned int, wsize, 2 << 15); |
| 187 | |
| 188 | /* limit to the amount that we can kmap at once */ |
| 189 | wsize = min_t(unsigned int, wsize, CIFS_KMAP_SIZE_LIMIT); |
| 190 | |
| 191 | return wsize; |
| 192 | } |
| 193 | |
| 194 | static unsigned int |
| 195 | smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) |
| 196 | { |
| 197 | struct TCP_Server_Info *server = tcon->ses->server; |
| 198 | unsigned int rsize; |
| 199 | |
| 200 | /* start with specified rsize, or default */ |
| 201 | rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE; |
| 202 | rsize = min_t(unsigned int, rsize, server->max_read); |
| 203 | /* |
| 204 | * limit write size to 2 ** 16, because we don't support multicredit |
| 205 | * requests now. |
| 206 | */ |
| 207 | rsize = min_t(unsigned int, rsize, 2 << 15); |
| 208 | |
| 209 | /* limit to the amount that we can kmap at once */ |
| 210 | rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT); |
| 211 | |
| 212 | return rsize; |
| 213 | } |
| 214 | |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 215 | static int |
| 216 | smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, |
| 217 | struct cifs_sb_info *cifs_sb, const char *full_path) |
| 218 | { |
| 219 | int rc; |
| 220 | __u64 persistent_fid, volatile_fid; |
| 221 | __le16 *utf16_path; |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 222 | __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 223 | |
| 224 | utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); |
| 225 | if (!utf16_path) |
| 226 | return -ENOMEM; |
| 227 | |
| 228 | rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid, |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 229 | FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL); |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 230 | if (rc) { |
| 231 | kfree(utf16_path); |
| 232 | return rc; |
| 233 | } |
| 234 | |
| 235 | rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid); |
| 236 | kfree(utf16_path); |
| 237 | return rc; |
| 238 | } |
| 239 | |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 240 | static int |
| 241 | smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, |
| 242 | struct cifs_sb_info *cifs_sb, const char *full_path, |
| 243 | u64 *uniqueid, FILE_ALL_INFO *data) |
| 244 | { |
| 245 | *uniqueid = le64_to_cpu(data->IndexNumber); |
| 246 | return 0; |
| 247 | } |
| 248 | |
Pavel Shilovsky | b7546bc | 2012-09-18 16:20:27 -0700 | [diff] [blame] | 249 | static int |
| 250 | smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, |
| 251 | struct cifs_fid *fid, FILE_ALL_INFO *data) |
| 252 | { |
| 253 | int rc; |
| 254 | struct smb2_file_all_info *smb2_data; |
| 255 | |
| 256 | smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2, |
| 257 | GFP_KERNEL); |
| 258 | if (smb2_data == NULL) |
| 259 | return -ENOMEM; |
| 260 | |
| 261 | rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, |
| 262 | smb2_data); |
| 263 | if (!rc) |
| 264 | move_smb2_info_to_cifs(data, smb2_data); |
| 265 | kfree(smb2_data); |
| 266 | return rc; |
| 267 | } |
| 268 | |
Pavel Shilovsky | 25e2663 | 2012-05-27 20:44:23 +0400 | [diff] [blame] | 269 | static char * |
| 270 | smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, |
| 271 | struct cifs_tcon *tcon) |
| 272 | { |
| 273 | int pplen = vol->prepath ? strlen(vol->prepath) : 0; |
| 274 | char *full_path = NULL; |
| 275 | |
| 276 | /* if no prefix path, simply set path to the root of share to "" */ |
| 277 | if (pplen == 0) { |
| 278 | full_path = kzalloc(2, GFP_KERNEL); |
| 279 | return full_path; |
| 280 | } |
| 281 | |
| 282 | cERROR(1, "prefixpath is not supported for SMB2 now"); |
| 283 | return NULL; |
| 284 | } |
| 285 | |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 286 | static bool |
| 287 | smb2_can_echo(struct TCP_Server_Info *server) |
| 288 | { |
| 289 | return server->echoes; |
| 290 | } |
| 291 | |
Pavel Shilovsky | d60622e | 2012-05-28 15:19:39 +0400 | [diff] [blame] | 292 | static void |
| 293 | smb2_clear_stats(struct cifs_tcon *tcon) |
| 294 | { |
| 295 | #ifdef CONFIG_CIFS_STATS |
| 296 | int i; |
| 297 | for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { |
| 298 | atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); |
| 299 | atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); |
| 300 | } |
| 301 | #endif |
| 302 | } |
| 303 | |
| 304 | static void |
| 305 | smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) |
| 306 | { |
| 307 | #ifdef CONFIG_CIFS_STATS |
| 308 | atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; |
| 309 | atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; |
| 310 | seq_printf(m, "\nNegotiates: %d sent %d failed", |
| 311 | atomic_read(&sent[SMB2_NEGOTIATE_HE]), |
| 312 | atomic_read(&failed[SMB2_NEGOTIATE_HE])); |
| 313 | seq_printf(m, "\nSessionSetups: %d sent %d failed", |
| 314 | atomic_read(&sent[SMB2_SESSION_SETUP_HE]), |
| 315 | atomic_read(&failed[SMB2_SESSION_SETUP_HE])); |
| 316 | #define SMB2LOGOFF 0x0002 /* trivial request/resp */ |
| 317 | seq_printf(m, "\nLogoffs: %d sent %d failed", |
| 318 | atomic_read(&sent[SMB2_LOGOFF_HE]), |
| 319 | atomic_read(&failed[SMB2_LOGOFF_HE])); |
| 320 | seq_printf(m, "\nTreeConnects: %d sent %d failed", |
| 321 | atomic_read(&sent[SMB2_TREE_CONNECT_HE]), |
| 322 | atomic_read(&failed[SMB2_TREE_CONNECT_HE])); |
| 323 | seq_printf(m, "\nTreeDisconnects: %d sent %d failed", |
| 324 | atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), |
| 325 | atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); |
| 326 | seq_printf(m, "\nCreates: %d sent %d failed", |
| 327 | atomic_read(&sent[SMB2_CREATE_HE]), |
| 328 | atomic_read(&failed[SMB2_CREATE_HE])); |
| 329 | seq_printf(m, "\nCloses: %d sent %d failed", |
| 330 | atomic_read(&sent[SMB2_CLOSE_HE]), |
| 331 | atomic_read(&failed[SMB2_CLOSE_HE])); |
| 332 | seq_printf(m, "\nFlushes: %d sent %d failed", |
| 333 | atomic_read(&sent[SMB2_FLUSH_HE]), |
| 334 | atomic_read(&failed[SMB2_FLUSH_HE])); |
| 335 | seq_printf(m, "\nReads: %d sent %d failed", |
| 336 | atomic_read(&sent[SMB2_READ_HE]), |
| 337 | atomic_read(&failed[SMB2_READ_HE])); |
| 338 | seq_printf(m, "\nWrites: %d sent %d failed", |
| 339 | atomic_read(&sent[SMB2_WRITE_HE]), |
| 340 | atomic_read(&failed[SMB2_WRITE_HE])); |
| 341 | seq_printf(m, "\nLocks: %d sent %d failed", |
| 342 | atomic_read(&sent[SMB2_LOCK_HE]), |
| 343 | atomic_read(&failed[SMB2_LOCK_HE])); |
| 344 | seq_printf(m, "\nIOCTLs: %d sent %d failed", |
| 345 | atomic_read(&sent[SMB2_IOCTL_HE]), |
| 346 | atomic_read(&failed[SMB2_IOCTL_HE])); |
| 347 | seq_printf(m, "\nCancels: %d sent %d failed", |
| 348 | atomic_read(&sent[SMB2_CANCEL_HE]), |
| 349 | atomic_read(&failed[SMB2_CANCEL_HE])); |
| 350 | seq_printf(m, "\nEchos: %d sent %d failed", |
| 351 | atomic_read(&sent[SMB2_ECHO_HE]), |
| 352 | atomic_read(&failed[SMB2_ECHO_HE])); |
| 353 | seq_printf(m, "\nQueryDirectories: %d sent %d failed", |
| 354 | atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), |
| 355 | atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); |
| 356 | seq_printf(m, "\nChangeNotifies: %d sent %d failed", |
| 357 | atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), |
| 358 | atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); |
| 359 | seq_printf(m, "\nQueryInfos: %d sent %d failed", |
| 360 | atomic_read(&sent[SMB2_QUERY_INFO_HE]), |
| 361 | atomic_read(&failed[SMB2_QUERY_INFO_HE])); |
| 362 | seq_printf(m, "\nSetInfos: %d sent %d failed", |
| 363 | atomic_read(&sent[SMB2_SET_INFO_HE]), |
| 364 | atomic_read(&failed[SMB2_SET_INFO_HE])); |
| 365 | seq_printf(m, "\nOplockBreaks: %d sent %d failed", |
| 366 | atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), |
| 367 | atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); |
| 368 | #endif |
| 369 | } |
| 370 | |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 371 | static void |
| 372 | smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) |
| 373 | { |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 374 | struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 375 | cfile->fid.persistent_fid = fid->persistent_fid; |
| 376 | cfile->fid.volatile_fid = fid->volatile_fid; |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 377 | smb2_set_oplock_level(cinode, oplock); |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 378 | /* cinode->can_cache_brlcks = cinode->clientCanCacheAll; */ |
| 379 | } |
| 380 | |
| 381 | static int |
| 382 | smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, |
| 383 | struct cifs_fid *fid) |
| 384 | { |
| 385 | return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); |
| 386 | } |
| 387 | |
Pavel Shilovsky | 7a5cfb1 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 388 | static int |
| 389 | smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, |
| 390 | struct cifs_fid *fid) |
| 391 | { |
| 392 | return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); |
| 393 | } |
| 394 | |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 395 | static unsigned int |
| 396 | smb2_read_data_offset(char *buf) |
| 397 | { |
| 398 | struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; |
| 399 | return rsp->DataOffset; |
| 400 | } |
| 401 | |
| 402 | static unsigned int |
| 403 | smb2_read_data_length(char *buf) |
| 404 | { |
| 405 | struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; |
| 406 | return le32_to_cpu(rsp->DataLength); |
| 407 | } |
| 408 | |
Pavel Shilovsky | d8e0503 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 409 | |
| 410 | static int |
| 411 | smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile, |
| 412 | struct cifs_io_parms *parms, unsigned int *bytes_read, |
| 413 | char **buf, int *buf_type) |
| 414 | { |
| 415 | parms->persistent_fid = cfile->fid.persistent_fid; |
| 416 | parms->volatile_fid = cfile->fid.volatile_fid; |
| 417 | return SMB2_read(xid, parms, bytes_read, buf, buf_type); |
| 418 | } |
| 419 | |
Pavel Shilovsky | 009d344 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 420 | static int |
| 421 | smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile, |
| 422 | struct cifs_io_parms *parms, unsigned int *written, |
| 423 | struct kvec *iov, unsigned long nr_segs) |
| 424 | { |
| 425 | |
| 426 | parms->persistent_fid = cfile->fid.persistent_fid; |
| 427 | parms->volatile_fid = cfile->fid.volatile_fid; |
| 428 | return SMB2_write(xid, parms, written, iov, nr_segs); |
| 429 | } |
| 430 | |
Pavel Shilovsky | c839ff2 | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 431 | static int |
| 432 | smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, |
| 433 | struct cifsFileInfo *cfile, __u64 size, bool set_alloc) |
| 434 | { |
| 435 | __le64 eof = cpu_to_le64(size); |
| 436 | return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, |
| 437 | cfile->fid.volatile_fid, cfile->pid, &eof); |
| 438 | } |
| 439 | |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 440 | static int |
| 441 | smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, |
| 442 | const char *path, struct cifs_sb_info *cifs_sb, |
| 443 | struct cifs_fid *fid, __u16 search_flags, |
| 444 | struct cifs_search_info *srch_inf) |
| 445 | { |
| 446 | __le16 *utf16_path; |
| 447 | int rc; |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 448 | __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 449 | __u64 persistent_fid, volatile_fid; |
| 450 | |
| 451 | utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); |
| 452 | if (!utf16_path) |
| 453 | return -ENOMEM; |
| 454 | |
| 455 | rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid, |
| 456 | FILE_READ_ATTRIBUTES | FILE_READ_DATA, FILE_OPEN, 0, 0, |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 457 | &oplock, NULL); |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 458 | kfree(utf16_path); |
| 459 | if (rc) { |
| 460 | cERROR(1, "open dir failed"); |
| 461 | return rc; |
| 462 | } |
| 463 | |
| 464 | srch_inf->entries_in_buffer = 0; |
| 465 | srch_inf->index_of_last_entry = 0; |
| 466 | fid->persistent_fid = persistent_fid; |
| 467 | fid->volatile_fid = volatile_fid; |
| 468 | |
| 469 | rc = SMB2_query_directory(xid, tcon, persistent_fid, volatile_fid, 0, |
| 470 | srch_inf); |
| 471 | if (rc) { |
| 472 | cERROR(1, "query directory failed"); |
| 473 | SMB2_close(xid, tcon, persistent_fid, volatile_fid); |
| 474 | } |
| 475 | return rc; |
| 476 | } |
| 477 | |
| 478 | static int |
| 479 | smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, |
| 480 | struct cifs_fid *fid, __u16 search_flags, |
| 481 | struct cifs_search_info *srch_inf) |
| 482 | { |
| 483 | return SMB2_query_directory(xid, tcon, fid->persistent_fid, |
| 484 | fid->volatile_fid, 0, srch_inf); |
| 485 | } |
| 486 | |
| 487 | static int |
| 488 | smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, |
| 489 | struct cifs_fid *fid) |
| 490 | { |
| 491 | return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); |
| 492 | } |
| 493 | |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 494 | /* |
| 495 | * If we negotiate SMB2 protocol and get STATUS_PENDING - update |
| 496 | * the number of credits and return true. Otherwise - return false. |
| 497 | */ |
| 498 | static bool |
| 499 | smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length) |
| 500 | { |
| 501 | struct smb2_hdr *hdr = (struct smb2_hdr *)buf; |
| 502 | |
| 503 | if (le32_to_cpu(hdr->Status) != STATUS_PENDING) |
| 504 | return false; |
| 505 | |
| 506 | if (!length) { |
| 507 | spin_lock(&server->req_lock); |
| 508 | server->credits += le16_to_cpu(hdr->CreditRequest); |
| 509 | spin_unlock(&server->req_lock); |
| 510 | wake_up(&server->request_q); |
| 511 | } |
| 512 | |
| 513 | return true; |
| 514 | } |
| 515 | |
Pavel Shilovsky | 983c88a | 2012-09-18 16:20:33 -0700 | [diff] [blame^] | 516 | static int |
| 517 | smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid, |
| 518 | struct cifsInodeInfo *cinode) |
| 519 | { |
| 520 | return SMB2_oplock_break(0, tcon, fid->persistent_fid, |
| 521 | fid->volatile_fid, |
| 522 | cinode->clientCanCacheRead ? 1 : 0); |
| 523 | } |
| 524 | |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 525 | struct smb_version_operations smb21_operations = { |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 526 | .setup_request = smb2_setup_request, |
Pavel Shilovsky | c95b8ee | 2012-07-11 14:45:28 +0400 | [diff] [blame] | 527 | .setup_async_request = smb2_setup_async_request, |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 528 | .check_receive = smb2_check_receive, |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 529 | .add_credits = smb2_add_credits, |
| 530 | .set_credits = smb2_set_credits, |
| 531 | .get_credits_field = smb2_get_credits_field, |
| 532 | .get_credits = smb2_get_credits, |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 533 | .get_next_mid = smb2_get_next_mid, |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 534 | .read_data_offset = smb2_read_data_offset, |
| 535 | .read_data_length = smb2_read_data_length, |
| 536 | .map_error = map_smb2_to_linux_error, |
Pavel Shilovsky | 093b2bd | 2011-06-08 15:51:07 +0400 | [diff] [blame] | 537 | .find_mid = smb2_find_mid, |
| 538 | .check_message = smb2_check_message, |
| 539 | .dump_detail = smb2_dump_detail, |
Pavel Shilovsky | d60622e | 2012-05-28 15:19:39 +0400 | [diff] [blame] | 540 | .clear_stats = smb2_clear_stats, |
| 541 | .print_stats = smb2_print_stats, |
Pavel Shilovsky | 983c88a | 2012-09-18 16:20:33 -0700 | [diff] [blame^] | 542 | .is_oplock_break = smb2_is_valid_oplock_break, |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 543 | .need_neg = smb2_need_neg, |
| 544 | .negotiate = smb2_negotiate, |
Pavel Shilovsky | 3a3bab5 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 545 | .negotiate_wsize = smb2_negotiate_wsize, |
| 546 | .negotiate_rsize = smb2_negotiate_rsize, |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 547 | .sess_setup = SMB2_sess_setup, |
| 548 | .logoff = SMB2_logoff, |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 549 | .tree_connect = SMB2_tcon, |
| 550 | .tree_disconnect = SMB2_tdis, |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 551 | .is_path_accessible = smb2_is_path_accessible, |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 552 | .can_echo = smb2_can_echo, |
| 553 | .echo = SMB2_echo, |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 554 | .query_path_info = smb2_query_path_info, |
| 555 | .get_srv_inum = smb2_get_srv_inum, |
Pavel Shilovsky | b7546bc | 2012-09-18 16:20:27 -0700 | [diff] [blame] | 556 | .query_file_info = smb2_query_file_info, |
Pavel Shilovsky | c839ff2 | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 557 | .set_path_size = smb2_set_path_size, |
| 558 | .set_file_size = smb2_set_file_size, |
Pavel Shilovsky | 1feeaac | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 559 | .set_file_info = smb2_set_file_info, |
Pavel Shilovsky | 25e2663 | 2012-05-27 20:44:23 +0400 | [diff] [blame] | 560 | .build_path_to_root = smb2_build_path_to_root, |
Pavel Shilovsky | a0e7318 | 2011-07-19 12:56:37 +0400 | [diff] [blame] | 561 | .mkdir = smb2_mkdir, |
| 562 | .mkdir_setinfo = smb2_mkdir_setinfo, |
Pavel Shilovsky | 1a500f0 | 2012-07-10 16:14:38 +0400 | [diff] [blame] | 563 | .rmdir = smb2_rmdir, |
Pavel Shilovsky | cbe6f43 | 2012-09-18 16:20:25 -0700 | [diff] [blame] | 564 | .unlink = smb2_unlink, |
Pavel Shilovsky | 35143eb | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 565 | .rename = smb2_rename_path, |
Pavel Shilovsky | 568798c | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 566 | .create_hardlink = smb2_create_hardlink, |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 567 | .open = smb2_open_file, |
| 568 | .set_fid = smb2_set_fid, |
| 569 | .close = smb2_close_file, |
Pavel Shilovsky | 7a5cfb1 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 570 | .flush = smb2_flush_file, |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 571 | .async_readv = smb2_async_readv, |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 572 | .async_writev = smb2_async_writev, |
Pavel Shilovsky | d8e0503 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 573 | .sync_read = smb2_sync_read, |
Pavel Shilovsky | 009d344 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 574 | .sync_write = smb2_sync_write, |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 575 | .query_dir_first = smb2_query_dir_first, |
| 576 | .query_dir_next = smb2_query_dir_next, |
| 577 | .close_dir = smb2_close_dir, |
| 578 | .calc_smb_size = smb2_calc_size, |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 579 | .is_status_pending = smb2_is_status_pending, |
Pavel Shilovsky | 983c88a | 2012-09-18 16:20:33 -0700 | [diff] [blame^] | 580 | .oplock_response = smb2_oplock_response, |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 581 | }; |
| 582 | |
| 583 | struct smb_version_values smb21_values = { |
| 584 | .version_string = SMB21_VERSION_STRING, |
Pavel Shilovsky | 093b2bd | 2011-06-08 15:51:07 +0400 | [diff] [blame] | 585 | .header_size = sizeof(struct smb2_hdr), |
| 586 | .max_header_size = MAX_SMB2_HDR_SIZE, |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 587 | .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 588 | .lock_cmd = SMB2_LOCK, |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 589 | .cap_unix = 0, |
| 590 | .cap_nt_find = SMB2_NT_FIND, |
| 591 | .cap_large_files = SMB2_LARGE_FILES, |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 592 | }; |