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 | |
| 20 | #include "cifsglob.h" |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 21 | #include "smb2pdu.h" |
| 22 | #include "smb2proto.h" |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 23 | #include "cifsproto.h" |
| 24 | #include "cifs_debug.h" |
| 25 | |
| 26 | static int |
| 27 | change_conf(struct TCP_Server_Info *server) |
| 28 | { |
| 29 | server->credits += server->echo_credits + server->oplock_credits; |
| 30 | server->oplock_credits = server->echo_credits = 0; |
| 31 | switch (server->credits) { |
| 32 | case 0: |
| 33 | return -1; |
| 34 | case 1: |
| 35 | server->echoes = false; |
| 36 | server->oplocks = false; |
| 37 | cERROR(1, "disabling echoes and oplocks"); |
| 38 | break; |
| 39 | case 2: |
| 40 | server->echoes = true; |
| 41 | server->oplocks = false; |
| 42 | server->echo_credits = 1; |
| 43 | cFYI(1, "disabling oplocks"); |
| 44 | break; |
| 45 | default: |
| 46 | server->echoes = true; |
| 47 | server->oplocks = true; |
| 48 | server->echo_credits = 1; |
| 49 | server->oplock_credits = 1; |
| 50 | } |
| 51 | server->credits -= server->echo_credits + server->oplock_credits; |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static void |
| 56 | smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add, |
| 57 | const int optype) |
| 58 | { |
| 59 | int *val, rc = 0; |
| 60 | spin_lock(&server->req_lock); |
| 61 | val = server->ops->get_credits_field(server, optype); |
| 62 | *val += add; |
| 63 | server->in_flight--; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 64 | if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP) |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 65 | rc = change_conf(server); |
| 66 | spin_unlock(&server->req_lock); |
| 67 | wake_up(&server->request_q); |
| 68 | if (rc) |
| 69 | cifs_reconnect(server); |
| 70 | } |
| 71 | |
| 72 | static void |
| 73 | smb2_set_credits(struct TCP_Server_Info *server, const int val) |
| 74 | { |
| 75 | spin_lock(&server->req_lock); |
| 76 | server->credits = val; |
| 77 | spin_unlock(&server->req_lock); |
| 78 | } |
| 79 | |
| 80 | static int * |
| 81 | smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) |
| 82 | { |
| 83 | switch (optype) { |
| 84 | case CIFS_ECHO_OP: |
| 85 | return &server->echo_credits; |
| 86 | case CIFS_OBREAK_OP: |
| 87 | return &server->oplock_credits; |
| 88 | default: |
| 89 | return &server->credits; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | static unsigned int |
| 94 | smb2_get_credits(struct mid_q_entry *mid) |
| 95 | { |
| 96 | return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest); |
| 97 | } |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 98 | |
| 99 | static __u64 |
| 100 | smb2_get_next_mid(struct TCP_Server_Info *server) |
| 101 | { |
| 102 | __u64 mid; |
| 103 | /* for SMB2 we need the current value */ |
| 104 | spin_lock(&GlobalMid_Lock); |
| 105 | mid = server->CurrentMid++; |
| 106 | spin_unlock(&GlobalMid_Lock); |
| 107 | return mid; |
| 108 | } |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 109 | |
Pavel Shilovsky | 093b2bd | 2011-06-08 15:51:07 +0400 | [diff] [blame] | 110 | static struct mid_q_entry * |
| 111 | smb2_find_mid(struct TCP_Server_Info *server, char *buf) |
| 112 | { |
| 113 | struct mid_q_entry *mid; |
| 114 | struct smb2_hdr *hdr = (struct smb2_hdr *)buf; |
| 115 | |
| 116 | spin_lock(&GlobalMid_Lock); |
| 117 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { |
| 118 | if ((mid->mid == hdr->MessageId) && |
| 119 | (mid->mid_state == MID_REQUEST_SUBMITTED) && |
| 120 | (mid->command == hdr->Command)) { |
| 121 | spin_unlock(&GlobalMid_Lock); |
| 122 | return mid; |
| 123 | } |
| 124 | } |
| 125 | spin_unlock(&GlobalMid_Lock); |
| 126 | return NULL; |
| 127 | } |
| 128 | |
| 129 | static void |
| 130 | smb2_dump_detail(void *buf) |
| 131 | { |
| 132 | #ifdef CONFIG_CIFS_DEBUG2 |
| 133 | struct smb2_hdr *smb = (struct smb2_hdr *)buf; |
| 134 | |
| 135 | cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d", |
| 136 | smb->Command, smb->Status, smb->Flags, smb->MessageId, |
| 137 | smb->ProcessId); |
| 138 | cERROR(1, "smb buf %p len %u", smb, smb2_calc_size(smb)); |
| 139 | #endif |
| 140 | } |
| 141 | |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 142 | static bool |
| 143 | smb2_need_neg(struct TCP_Server_Info *server) |
| 144 | { |
| 145 | return server->max_read == 0; |
| 146 | } |
| 147 | |
| 148 | static int |
| 149 | smb2_negotiate(const unsigned int xid, struct cifs_ses *ses) |
| 150 | { |
| 151 | int rc; |
| 152 | ses->server->CurrentMid = 0; |
| 153 | rc = SMB2_negotiate(xid, ses); |
| 154 | /* BB we probably don't need to retry with modern servers */ |
| 155 | if (rc == -EAGAIN) |
| 156 | rc = -EHOSTDOWN; |
| 157 | return rc; |
| 158 | } |
| 159 | |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 160 | static int |
| 161 | smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, |
| 162 | struct cifs_sb_info *cifs_sb, const char *full_path) |
| 163 | { |
| 164 | int rc; |
| 165 | __u64 persistent_fid, volatile_fid; |
| 166 | __le16 *utf16_path; |
| 167 | |
| 168 | utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); |
| 169 | if (!utf16_path) |
| 170 | return -ENOMEM; |
| 171 | |
| 172 | rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid, |
| 173 | FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0); |
| 174 | if (rc) { |
| 175 | kfree(utf16_path); |
| 176 | return rc; |
| 177 | } |
| 178 | |
| 179 | rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid); |
| 180 | kfree(utf16_path); |
| 181 | return rc; |
| 182 | } |
| 183 | |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 184 | static int |
| 185 | smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, |
| 186 | struct cifs_sb_info *cifs_sb, const char *full_path, |
| 187 | u64 *uniqueid, FILE_ALL_INFO *data) |
| 188 | { |
| 189 | *uniqueid = le64_to_cpu(data->IndexNumber); |
| 190 | return 0; |
| 191 | } |
| 192 | |
Pavel Shilovsky | 25e2663 | 2012-05-27 20:44:23 +0400 | [diff] [blame] | 193 | static char * |
| 194 | smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, |
| 195 | struct cifs_tcon *tcon) |
| 196 | { |
| 197 | int pplen = vol->prepath ? strlen(vol->prepath) : 0; |
| 198 | char *full_path = NULL; |
| 199 | |
| 200 | /* if no prefix path, simply set path to the root of share to "" */ |
| 201 | if (pplen == 0) { |
| 202 | full_path = kzalloc(2, GFP_KERNEL); |
| 203 | return full_path; |
| 204 | } |
| 205 | |
| 206 | cERROR(1, "prefixpath is not supported for SMB2 now"); |
| 207 | return NULL; |
| 208 | } |
| 209 | |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 210 | static bool |
| 211 | smb2_can_echo(struct TCP_Server_Info *server) |
| 212 | { |
| 213 | return server->echoes; |
| 214 | } |
| 215 | |
Pavel Shilovsky | d60622e | 2012-05-28 15:19:39 +0400 | [diff] [blame] | 216 | static void |
| 217 | smb2_clear_stats(struct cifs_tcon *tcon) |
| 218 | { |
| 219 | #ifdef CONFIG_CIFS_STATS |
| 220 | int i; |
| 221 | for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { |
| 222 | atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); |
| 223 | atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); |
| 224 | } |
| 225 | #endif |
| 226 | } |
| 227 | |
| 228 | static void |
| 229 | smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) |
| 230 | { |
| 231 | #ifdef CONFIG_CIFS_STATS |
| 232 | atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; |
| 233 | atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; |
| 234 | seq_printf(m, "\nNegotiates: %d sent %d failed", |
| 235 | atomic_read(&sent[SMB2_NEGOTIATE_HE]), |
| 236 | atomic_read(&failed[SMB2_NEGOTIATE_HE])); |
| 237 | seq_printf(m, "\nSessionSetups: %d sent %d failed", |
| 238 | atomic_read(&sent[SMB2_SESSION_SETUP_HE]), |
| 239 | atomic_read(&failed[SMB2_SESSION_SETUP_HE])); |
| 240 | #define SMB2LOGOFF 0x0002 /* trivial request/resp */ |
| 241 | seq_printf(m, "\nLogoffs: %d sent %d failed", |
| 242 | atomic_read(&sent[SMB2_LOGOFF_HE]), |
| 243 | atomic_read(&failed[SMB2_LOGOFF_HE])); |
| 244 | seq_printf(m, "\nTreeConnects: %d sent %d failed", |
| 245 | atomic_read(&sent[SMB2_TREE_CONNECT_HE]), |
| 246 | atomic_read(&failed[SMB2_TREE_CONNECT_HE])); |
| 247 | seq_printf(m, "\nTreeDisconnects: %d sent %d failed", |
| 248 | atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), |
| 249 | atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); |
| 250 | seq_printf(m, "\nCreates: %d sent %d failed", |
| 251 | atomic_read(&sent[SMB2_CREATE_HE]), |
| 252 | atomic_read(&failed[SMB2_CREATE_HE])); |
| 253 | seq_printf(m, "\nCloses: %d sent %d failed", |
| 254 | atomic_read(&sent[SMB2_CLOSE_HE]), |
| 255 | atomic_read(&failed[SMB2_CLOSE_HE])); |
| 256 | seq_printf(m, "\nFlushes: %d sent %d failed", |
| 257 | atomic_read(&sent[SMB2_FLUSH_HE]), |
| 258 | atomic_read(&failed[SMB2_FLUSH_HE])); |
| 259 | seq_printf(m, "\nReads: %d sent %d failed", |
| 260 | atomic_read(&sent[SMB2_READ_HE]), |
| 261 | atomic_read(&failed[SMB2_READ_HE])); |
| 262 | seq_printf(m, "\nWrites: %d sent %d failed", |
| 263 | atomic_read(&sent[SMB2_WRITE_HE]), |
| 264 | atomic_read(&failed[SMB2_WRITE_HE])); |
| 265 | seq_printf(m, "\nLocks: %d sent %d failed", |
| 266 | atomic_read(&sent[SMB2_LOCK_HE]), |
| 267 | atomic_read(&failed[SMB2_LOCK_HE])); |
| 268 | seq_printf(m, "\nIOCTLs: %d sent %d failed", |
| 269 | atomic_read(&sent[SMB2_IOCTL_HE]), |
| 270 | atomic_read(&failed[SMB2_IOCTL_HE])); |
| 271 | seq_printf(m, "\nCancels: %d sent %d failed", |
| 272 | atomic_read(&sent[SMB2_CANCEL_HE]), |
| 273 | atomic_read(&failed[SMB2_CANCEL_HE])); |
| 274 | seq_printf(m, "\nEchos: %d sent %d failed", |
| 275 | atomic_read(&sent[SMB2_ECHO_HE]), |
| 276 | atomic_read(&failed[SMB2_ECHO_HE])); |
| 277 | seq_printf(m, "\nQueryDirectories: %d sent %d failed", |
| 278 | atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), |
| 279 | atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); |
| 280 | seq_printf(m, "\nChangeNotifies: %d sent %d failed", |
| 281 | atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), |
| 282 | atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); |
| 283 | seq_printf(m, "\nQueryInfos: %d sent %d failed", |
| 284 | atomic_read(&sent[SMB2_QUERY_INFO_HE]), |
| 285 | atomic_read(&failed[SMB2_QUERY_INFO_HE])); |
| 286 | seq_printf(m, "\nSetInfos: %d sent %d failed", |
| 287 | atomic_read(&sent[SMB2_SET_INFO_HE]), |
| 288 | atomic_read(&failed[SMB2_SET_INFO_HE])); |
| 289 | seq_printf(m, "\nOplockBreaks: %d sent %d failed", |
| 290 | atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), |
| 291 | atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); |
| 292 | #endif |
| 293 | } |
| 294 | |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 295 | struct smb_version_operations smb21_operations = { |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 296 | .setup_request = smb2_setup_request, |
Pavel Shilovsky | c95b8ee | 2012-07-11 14:45:28 +0400 | [diff] [blame] | 297 | .setup_async_request = smb2_setup_async_request, |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 298 | .check_receive = smb2_check_receive, |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 299 | .add_credits = smb2_add_credits, |
| 300 | .set_credits = smb2_set_credits, |
| 301 | .get_credits_field = smb2_get_credits_field, |
| 302 | .get_credits = smb2_get_credits, |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 303 | .get_next_mid = smb2_get_next_mid, |
Pavel Shilovsky | 093b2bd | 2011-06-08 15:51:07 +0400 | [diff] [blame] | 304 | .find_mid = smb2_find_mid, |
| 305 | .check_message = smb2_check_message, |
| 306 | .dump_detail = smb2_dump_detail, |
Pavel Shilovsky | d60622e | 2012-05-28 15:19:39 +0400 | [diff] [blame] | 307 | .clear_stats = smb2_clear_stats, |
| 308 | .print_stats = smb2_print_stats, |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 309 | .need_neg = smb2_need_neg, |
| 310 | .negotiate = smb2_negotiate, |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 311 | .sess_setup = SMB2_sess_setup, |
| 312 | .logoff = SMB2_logoff, |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 313 | .tree_connect = SMB2_tcon, |
| 314 | .tree_disconnect = SMB2_tdis, |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 315 | .is_path_accessible = smb2_is_path_accessible, |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 316 | .can_echo = smb2_can_echo, |
| 317 | .echo = SMB2_echo, |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 318 | .query_path_info = smb2_query_path_info, |
| 319 | .get_srv_inum = smb2_get_srv_inum, |
Pavel Shilovsky | 25e2663 | 2012-05-27 20:44:23 +0400 | [diff] [blame] | 320 | .build_path_to_root = smb2_build_path_to_root, |
Pavel Shilovsky | a0e7318 | 2011-07-19 12:56:37 +0400 | [diff] [blame] | 321 | .mkdir = smb2_mkdir, |
| 322 | .mkdir_setinfo = smb2_mkdir_setinfo, |
Pavel Shilovsky | 1a500f0 | 2012-07-10 16:14:38 +0400 | [diff] [blame] | 323 | .rmdir = smb2_rmdir, |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 324 | }; |
| 325 | |
| 326 | struct smb_version_values smb21_values = { |
| 327 | .version_string = SMB21_VERSION_STRING, |
Pavel Shilovsky | 093b2bd | 2011-06-08 15:51:07 +0400 | [diff] [blame] | 328 | .header_size = sizeof(struct smb2_hdr), |
| 329 | .max_header_size = MAX_SMB2_HDR_SIZE, |
Pavel Shilovsky | 2dc7e1c | 2011-12-26 22:53:34 +0400 | [diff] [blame] | 330 | .lock_cmd = SMB2_LOCK, |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 331 | .cap_unix = 0, |
| 332 | .cap_nt_find = SMB2_NT_FIND, |
| 333 | .cap_large_files = SMB2_LARGE_FILES, |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 334 | }; |