Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/misc.c |
| 3 | * |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU Lesser General Public License as published |
| 9 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 15 | * the GNU Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public License |
| 18 | * along with this library; if not, write to the Free Software |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | */ |
| 21 | |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/ctype.h> |
| 24 | #include <linux/mempool.h> |
| 25 | #include "cifspdu.h" |
| 26 | #include "cifsglob.h" |
| 27 | #include "cifsproto.h" |
| 28 | #include "cifs_debug.h" |
| 29 | #include "smberr.h" |
| 30 | #include "nterr.h" |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 31 | #include "cifs_unicode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | extern mempool_t *cifs_sm_req_poolp; |
| 34 | extern mempool_t *cifs_req_poolp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 36 | /* The xid serves as a useful identifier for each incoming vfs request, |
| 37 | in a similar way to the mid which is useful to track each sent smb, |
| 38 | and CurrentXid can also provide a running counter (although it |
| 39 | will eventually wrap past zero) of the total vfs operations handled |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | since the cifs fs was mounted */ |
| 41 | |
| 42 | unsigned int |
| 43 | _GetXid(void) |
| 44 | { |
| 45 | unsigned int xid; |
| 46 | |
| 47 | spin_lock(&GlobalMid_Lock); |
| 48 | GlobalTotalActiveXid++; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 49 | |
| 50 | /* keep high water mark for number of simultaneous ops in filesystem */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | if (GlobalTotalActiveXid > GlobalMaxActiveXid) |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 52 | GlobalMaxActiveXid = GlobalTotalActiveXid; |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 53 | if (GlobalTotalActiveXid > 65000) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 54 | cFYI(1, "warning: more than 65000 requests active"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | xid = GlobalCurrentXid++; |
| 56 | spin_unlock(&GlobalMid_Lock); |
| 57 | return xid; |
| 58 | } |
| 59 | |
| 60 | void |
| 61 | _FreeXid(unsigned int xid) |
| 62 | { |
| 63 | spin_lock(&GlobalMid_Lock); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 64 | /* if (GlobalTotalActiveXid == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | BUG(); */ |
| 66 | GlobalTotalActiveXid--; |
| 67 | spin_unlock(&GlobalMid_Lock); |
| 68 | } |
| 69 | |
| 70 | struct cifsSesInfo * |
| 71 | sesInfoAlloc(void) |
| 72 | { |
| 73 | struct cifsSesInfo *ret_buf; |
| 74 | |
Steve French | 630f3f0 | 2007-10-25 21:17:17 +0000 | [diff] [blame] | 75 | ret_buf = kzalloc(sizeof(struct cifsSesInfo), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | if (ret_buf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | atomic_inc(&sesInfoAllocCount); |
| 78 | ret_buf->status = CifsNew; |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 79 | ++ret_buf->ses_count; |
| 80 | INIT_LIST_HEAD(&ret_buf->smb_ses_list); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 81 | INIT_LIST_HEAD(&ret_buf->tcon_list); |
Steve French | d7b619c | 2010-02-25 05:36:46 +0000 | [diff] [blame] | 82 | mutex_init(&ret_buf->session_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | return ret_buf; |
| 85 | } |
| 86 | |
| 87 | void |
| 88 | sesInfoFree(struct cifsSesInfo *buf_to_free) |
| 89 | { |
| 90 | if (buf_to_free == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 91 | cFYI(1, "Null buffer passed to sesInfoFree"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | return; |
| 93 | } |
| 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | atomic_dec(&sesInfoAllocCount); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 96 | kfree(buf_to_free->serverOS); |
| 97 | kfree(buf_to_free->serverDomain); |
| 98 | kfree(buf_to_free->serverNOS); |
Jeff Layton | 55162de | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 99 | if (buf_to_free->password) { |
| 100 | memset(buf_to_free->password, 0, strlen(buf_to_free->password)); |
| 101 | kfree(buf_to_free->password); |
| 102 | } |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 103 | kfree(buf_to_free->domainName); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | kfree(buf_to_free); |
| 105 | } |
| 106 | |
| 107 | struct cifsTconInfo * |
| 108 | tconInfoAlloc(void) |
| 109 | { |
| 110 | struct cifsTconInfo *ret_buf; |
Steve French | 630f3f0 | 2007-10-25 21:17:17 +0000 | [diff] [blame] | 111 | ret_buf = kzalloc(sizeof(struct cifsTconInfo), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | if (ret_buf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | atomic_inc(&tconInfoAllocCount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | ret_buf->tidStatus = CifsNew; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 115 | ++ret_buf->tc_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | INIT_LIST_HEAD(&ret_buf->openFileList); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 117 | INIT_LIST_HEAD(&ret_buf->tcon_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | #ifdef CONFIG_CIFS_STATS |
| 119 | spin_lock_init(&ret_buf->stat_lock); |
| 120 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | return ret_buf; |
| 123 | } |
| 124 | |
| 125 | void |
| 126 | tconInfoFree(struct cifsTconInfo *buf_to_free) |
| 127 | { |
| 128 | if (buf_to_free == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 129 | cFYI(1, "Null buffer passed to tconInfoFree"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | return; |
| 131 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | atomic_dec(&tconInfoAllocCount); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 133 | kfree(buf_to_free->nativeFileSystem); |
Jeff Layton | 00e485b | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 134 | if (buf_to_free->password) { |
| 135 | memset(buf_to_free->password, 0, strlen(buf_to_free->password)); |
| 136 | kfree(buf_to_free->password); |
| 137 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | kfree(buf_to_free); |
| 139 | } |
| 140 | |
| 141 | struct smb_hdr * |
| 142 | cifs_buf_get(void) |
| 143 | { |
| 144 | struct smb_hdr *ret_buf = NULL; |
| 145 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 146 | /* We could use negotiated size instead of max_msgsize - |
| 147 | but it may be more efficient to always alloc same size |
| 148 | albeit slightly larger than necessary and maxbuffersize |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | defaults to this and can not be bigger */ |
Pekka Enberg | 232087c | 2008-09-15 13:22:54 +0300 | [diff] [blame] | 150 | ret_buf = mempool_alloc(cifs_req_poolp, GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | /* clear the first few header bytes */ |
| 153 | /* for most paths, more is cleared in header_assemble */ |
| 154 | if (ret_buf) { |
| 155 | memset(ret_buf, 0, sizeof(struct smb_hdr) + 3); |
| 156 | atomic_inc(&bufAllocCount); |
Steve French | 4498eed | 2005-12-03 13:58:57 -0800 | [diff] [blame] | 157 | #ifdef CONFIG_CIFS_STATS2 |
| 158 | atomic_inc(&totBufAllocCount); |
| 159 | #endif /* CONFIG_CIFS_STATS2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | return ret_buf; |
| 163 | } |
| 164 | |
| 165 | void |
| 166 | cifs_buf_release(void *buf_to_free) |
| 167 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | if (buf_to_free == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 169 | /* cFYI(1, "Null buffer passed to cifs_buf_release");*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | return; |
| 171 | } |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 172 | mempool_free(buf_to_free, cifs_req_poolp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | atomic_dec(&bufAllocCount); |
| 175 | return; |
| 176 | } |
| 177 | |
| 178 | struct smb_hdr * |
| 179 | cifs_small_buf_get(void) |
| 180 | { |
| 181 | struct smb_hdr *ret_buf = NULL; |
| 182 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 183 | /* We could use negotiated size instead of max_msgsize - |
| 184 | but it may be more efficient to always alloc same size |
| 185 | albeit slightly larger than necessary and maxbuffersize |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | defaults to this and can not be bigger */ |
Pekka Enberg | 232087c | 2008-09-15 13:22:54 +0300 | [diff] [blame] | 187 | ret_buf = mempool_alloc(cifs_sm_req_poolp, GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | if (ret_buf) { |
| 189 | /* No need to clear memory here, cleared in header assemble */ |
| 190 | /* memset(ret_buf, 0, sizeof(struct smb_hdr) + 27);*/ |
| 191 | atomic_inc(&smBufAllocCount); |
Steve French | 4498eed | 2005-12-03 13:58:57 -0800 | [diff] [blame] | 192 | #ifdef CONFIG_CIFS_STATS2 |
| 193 | atomic_inc(&totSmBufAllocCount); |
| 194 | #endif /* CONFIG_CIFS_STATS2 */ |
| 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } |
| 197 | return ret_buf; |
| 198 | } |
| 199 | |
| 200 | void |
| 201 | cifs_small_buf_release(void *buf_to_free) |
| 202 | { |
| 203 | |
| 204 | if (buf_to_free == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 205 | cFYI(1, "Null buffer passed to cifs_small_buf_release"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | return; |
| 207 | } |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 208 | mempool_free(buf_to_free, cifs_sm_req_poolp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | atomic_dec(&smBufAllocCount); |
| 211 | return; |
| 212 | } |
| 213 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 214 | /* |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 215 | Find a free multiplex id (SMB mid). Otherwise there could be |
| 216 | mid collisions which might cause problems, demultiplexing the |
| 217 | wrong response to this request. Multiplex ids could collide if |
| 218 | one of a series requests takes much longer than the others, or |
| 219 | if a very large number of long lived requests (byte range |
| 220 | locks or FindNotify requests) are pending. No more than |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 221 | 64K-1 requests can be outstanding at one time. If no |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 222 | mids are available, return zero. A future optimization |
| 223 | could make the combination of mids and uid the key we use |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 224 | to demultiplex on (rather than mid alone). |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 225 | In addition to the above check, the cifs demultiplex |
| 226 | code already used the command code as a secondary |
| 227 | check of the frame and if signing is negotiated the |
| 228 | response would be discarded if the mid were the same |
| 229 | but the signature was wrong. Since the mid is not put in the |
| 230 | pending queue until later (when it is about to be dispatched) |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 231 | we do have to limit the number of outstanding requests |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 232 | to somewhat less than 64K-1 although it is hard to imagine |
| 233 | so many threads being in the vfs at one time. |
| 234 | */ |
| 235 | __u16 GetNextMid(struct TCP_Server_Info *server) |
| 236 | { |
| 237 | __u16 mid = 0; |
| 238 | __u16 last_mid; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 239 | int collision; |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 240 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 241 | if (server == NULL) |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 242 | return mid; |
| 243 | |
| 244 | spin_lock(&GlobalMid_Lock); |
| 245 | last_mid = server->CurrentMid; /* we do not want to loop forever */ |
| 246 | server->CurrentMid++; |
| 247 | /* This nested loop looks more expensive than it is. |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 248 | In practice the list of pending requests is short, |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 249 | fewer than 50, and the mids are likely to be unique |
| 250 | on the first pass through the loop unless some request |
| 251 | takes longer than the 64 thousand requests before it |
| 252 | (and it would also have to have been a request that |
| 253 | did not time out) */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 254 | while (server->CurrentMid != last_mid) { |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 255 | struct list_head *tmp; |
| 256 | struct mid_q_entry *mid_entry; |
| 257 | |
| 258 | collision = 0; |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 259 | if (server->CurrentMid == 0) |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 260 | server->CurrentMid++; |
| 261 | |
| 262 | list_for_each(tmp, &server->pending_mid_q) { |
| 263 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
| 264 | |
| 265 | if ((mid_entry->mid == server->CurrentMid) && |
| 266 | (mid_entry->midState == MID_REQUEST_SUBMITTED)) { |
| 267 | /* This mid is in use, try a different one */ |
| 268 | collision = 1; |
| 269 | break; |
| 270 | } |
| 271 | } |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 272 | if (collision == 0) { |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 273 | mid = server->CurrentMid; |
| 274 | break; |
| 275 | } |
| 276 | server->CurrentMid++; |
| 277 | } |
| 278 | spin_unlock(&GlobalMid_Lock); |
| 279 | return mid; |
| 280 | } |
| 281 | |
| 282 | /* NB: MID can not be set if treeCon not passed in, in that |
| 283 | case it is responsbility of caller to set the mid */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | void |
| 285 | header_assemble(struct smb_hdr *buffer, char smb_command /* command */ , |
| 286 | const struct cifsTconInfo *treeCon, int word_count |
| 287 | /* length of fixed section (word count) in two byte units */) |
| 288 | { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 289 | struct list_head *temp_item; |
| 290 | struct cifsSesInfo *ses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | char *temp = (char *) buffer; |
| 292 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 293 | memset(temp, 0, 256); /* bigger than MAX_CIFS_HDR_SIZE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
| 295 | buffer->smb_buf_length = |
Steve French | 630f3f0 | 2007-10-25 21:17:17 +0000 | [diff] [blame] | 296 | (2 * word_count) + sizeof(struct smb_hdr) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | 4 /* RFC 1001 length field does not count */ + |
| 298 | 2 /* for bcc field itself */ ; |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 299 | /* Note that this is the only network field that has to be converted |
| 300 | to big endian and it is done just before we send it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | buffer->Protocol[0] = 0xFF; |
| 303 | buffer->Protocol[1] = 'S'; |
| 304 | buffer->Protocol[2] = 'M'; |
| 305 | buffer->Protocol[3] = 'B'; |
| 306 | buffer->Command = smb_command; |
| 307 | buffer->Flags = 0x00; /* case sensitive */ |
| 308 | buffer->Flags2 = SMBFLG2_KNOWS_LONG_NAMES; |
| 309 | buffer->Pid = cpu_to_le16((__u16)current->tgid); |
| 310 | buffer->PidHigh = cpu_to_le16((__u16)(current->tgid >> 16)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | if (treeCon) { |
| 312 | buffer->Tid = treeCon->tid; |
| 313 | if (treeCon->ses) { |
| 314 | if (treeCon->ses->capabilities & CAP_UNICODE) |
| 315 | buffer->Flags2 |= SMBFLG2_UNICODE; |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 316 | if (treeCon->ses->capabilities & CAP_STATUS32) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | buffer->Flags2 |= SMBFLG2_ERR_STATUS; |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 318 | |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 319 | /* Uid is not converted */ |
| 320 | buffer->Uid = treeCon->ses->Suid; |
| 321 | buffer->Mid = GetNextMid(treeCon->ses->server); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 322 | if (multiuser_mount != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | /* For the multiuser case, there are few obvious technically */ |
| 324 | /* possible mechanisms to match the local linux user (uid) */ |
| 325 | /* to a valid remote smb user (smb_uid): */ |
| 326 | /* 1) Query Winbind (or other local pam/nss daemon */ |
| 327 | /* for userid/password/logon_domain or credential */ |
| 328 | /* 2) Query Winbind for uid to sid to username mapping */ |
| 329 | /* and see if we have a matching password for existing*/ |
| 330 | /* session for that user perhas getting password by */ |
| 331 | /* adding a new pam_cifs module that stores passwords */ |
| 332 | /* so that the cifs vfs can get at that for all logged*/ |
| 333 | /* on users */ |
| 334 | /* 3) (Which is the mechanism we have chosen) */ |
| 335 | /* Search through sessions to the same server for a */ |
| 336 | /* a match on the uid that was passed in on mount */ |
| 337 | /* with the current processes uid (or euid?) and use */ |
| 338 | /* that smb uid. If no existing smb session for */ |
| 339 | /* that uid found, use the default smb session ie */ |
| 340 | /* the smb session for the volume mounted which is */ |
| 341 | /* the same as would be used if the multiuser mount */ |
| 342 | /* flag were disabled. */ |
| 343 | |
| 344 | /* BB Add support for establishing new tCon and SMB Session */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 345 | /* with userid/password pairs found on the smb session */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | /* for other target tcp/ip addresses BB */ |
David Howells | a001e5b | 2008-11-14 10:38:47 +1100 | [diff] [blame] | 347 | if (current_fsuid() != treeCon->ses->linux_uid) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 348 | cFYI(1, "Multiuser mode and UID " |
| 349 | "did not match tcon uid"); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 350 | read_lock(&cifs_tcp_ses_lock); |
| 351 | list_for_each(temp_item, &treeCon->ses->server->smb_ses_list) { |
| 352 | ses = list_entry(temp_item, struct cifsSesInfo, smb_ses_list); |
David Howells | a001e5b | 2008-11-14 10:38:47 +1100 | [diff] [blame] | 353 | if (ses->linux_uid == current_fsuid()) { |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 354 | if (ses->server == treeCon->ses->server) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 355 | cFYI(1, "found matching uid substitute right smb_uid"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | buffer->Uid = ses->Suid; |
| 357 | break; |
| 358 | } else { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 359 | /* BB eventually call cifs_setup_session here */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 360 | cFYI(1, "local UID found but no smb sess with this server exists"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | } |
| 363 | } |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 364 | read_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | } |
| 367 | } |
| 368 | if (treeCon->Flags & SMB_SHARE_IS_IN_DFS) |
| 369 | buffer->Flags2 |= SMBFLG2_DFS; |
Steve French | d3485d3 | 2005-08-19 11:04:29 -0700 | [diff] [blame] | 370 | if (treeCon->nocase) |
| 371 | buffer->Flags |= SMBFLG_CASELESS; |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 372 | if ((treeCon->ses) && (treeCon->ses->server)) |
| 373 | if (treeCon->ses->server->secMode & |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
| 375 | buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
| 376 | } |
| 377 | |
| 378 | /* endian conversion of flags is now done just before sending */ |
| 379 | buffer->WordCount = (char) word_count; |
| 380 | return; |
| 381 | } |
| 382 | |
Steve French | 2cd646a | 2006-09-28 19:43:08 +0000 | [diff] [blame] | 383 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | checkSMBhdr(struct smb_hdr *smb, __u16 mid) |
| 385 | { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 386 | /* Make sure that this really is an SMB, that it is a response, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | and that the message ids match */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 388 | if ((*(__le32 *) smb->Protocol == cpu_to_le32(0x424d53ff)) && |
| 389 | (mid == smb->Mid)) { |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 390 | if (smb->Flags & SMBFLG_RESPONSE) |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 391 | return 0; |
| 392 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | /* only one valid case where server sends us request */ |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 394 | if (smb->Command == SMB_COM_LOCKING_ANDX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | return 0; |
| 396 | else |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 397 | cERROR(1, "Received Request not response"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
| 399 | } else { /* bad signature or mid */ |
| 400 | if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff)) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 401 | cERROR(1, "Bad protocol string signature header %x", |
| 402 | *(unsigned int *) smb->Protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | if (mid != smb->Mid) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 404 | cERROR(1, "Mids do not match"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 406 | cERROR(1, "bad smb detected. The Mid=%d", smb->Mid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | return 1; |
| 408 | } |
| 409 | |
| 410 | int |
Steve French | d103e16 | 2006-10-12 17:49:24 +0000 | [diff] [blame] | 411 | checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | { |
Steve French | 70ca734 | 2005-09-22 16:32:06 -0700 | [diff] [blame] | 413 | __u32 len = smb->smb_buf_length; |
Steve French | 190fdeb | 2005-10-10 11:48:26 -0700 | [diff] [blame] | 414 | __u32 clc_len; /* calculated length */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 415 | cFYI(0, "checkSMB Length: 0x%x, smb_buf_length: 0x%x", length, len); |
Steve French | d103e16 | 2006-10-12 17:49:24 +0000 | [diff] [blame] | 416 | |
Steve French | 630f3f0 | 2007-10-25 21:17:17 +0000 | [diff] [blame] | 417 | if (length < 2 + sizeof(struct smb_hdr)) { |
| 418 | if ((length >= sizeof(struct smb_hdr) - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | && (smb->Status.CifsError != 0)) { |
Steve French | d103e16 | 2006-10-12 17:49:24 +0000 | [diff] [blame] | 420 | smb->WordCount = 0; |
| 421 | /* some error cases do not return wct and bcc */ |
| 422 | return 0; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 423 | } else if ((length == sizeof(struct smb_hdr) + 1) && |
Steve French | d103e16 | 2006-10-12 17:49:24 +0000 | [diff] [blame] | 424 | (smb->WordCount == 0)) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 425 | char *tmp = (char *)smb; |
Steve French | d103e16 | 2006-10-12 17:49:24 +0000 | [diff] [blame] | 426 | /* Need to work around a bug in two servers here */ |
| 427 | /* First, check if the part of bcc they sent was zero */ |
| 428 | if (tmp[sizeof(struct smb_hdr)] == 0) { |
| 429 | /* some servers return only half of bcc |
| 430 | * on simple responses (wct, bcc both zero) |
| 431 | * in particular have seen this on |
| 432 | * ulogoffX and FindClose. This leaves |
| 433 | * one byte of bcc potentially unitialized |
| 434 | */ |
| 435 | /* zero rest of bcc */ |
| 436 | tmp[sizeof(struct smb_hdr)+1] = 0; |
Steve French | 46c79a6 | 2006-03-02 00:07:08 +0000 | [diff] [blame] | 437 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 439 | cERROR(1, "rcvd invalid byte count (bcc)"); |
Steve French | d103e16 | 2006-10-12 17:49:24 +0000 | [diff] [blame] | 440 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 441 | cERROR(1, "Length less than smb header size"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
Steve French | d103e16 | 2006-10-12 17:49:24 +0000 | [diff] [blame] | 443 | return 1; |
| 444 | } |
| 445 | if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 446 | cERROR(1, "smb length greater than MaxBufSize, mid=%d", |
| 447 | smb->Mid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | return 1; |
| 449 | } |
| 450 | |
| 451 | if (checkSMBhdr(smb, mid)) |
| 452 | return 1; |
Steve French | 190fdeb | 2005-10-10 11:48:26 -0700 | [diff] [blame] | 453 | clc_len = smbCalcSize_LE(smb); |
Steve French | 184ed21 | 2006-02-24 06:15:11 +0000 | [diff] [blame] | 454 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 455 | if (4 + len != length) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 456 | cERROR(1, "Length read does not match RFC1001 length %d", |
| 457 | len); |
Steve French | 184ed21 | 2006-02-24 06:15:11 +0000 | [diff] [blame] | 458 | return 1; |
| 459 | } |
| 460 | |
| 461 | if (4 + len != clc_len) { |
| 462 | /* check if bcc wrapped around for large read responses */ |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 463 | if ((len > 64 * 1024) && (len > clc_len)) { |
Steve French | 184ed21 | 2006-02-24 06:15:11 +0000 | [diff] [blame] | 464 | /* check if lengths match mod 64K */ |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 465 | if (((4 + len) & 0xFFFF) == (clc_len & 0xFFFF)) |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 466 | return 0; /* bcc wrapped */ |
Steve French | 184ed21 | 2006-02-24 06:15:11 +0000 | [diff] [blame] | 467 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 468 | cFYI(1, "Calculated size %d vs length %d mismatch for mid %d", |
| 469 | clc_len, 4 + len, smb->Mid); |
Steve French | 190fdeb | 2005-10-10 11:48:26 -0700 | [diff] [blame] | 470 | /* Windows XP can return a few bytes too much, presumably |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 471 | an illegal pad, at the end of byte range lock responses |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 472 | so we allow for that three byte pad, as long as actual |
Steve French | 190fdeb | 2005-10-10 11:48:26 -0700 | [diff] [blame] | 473 | received length is as long or longer than calculated length */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 474 | /* We have now had to extend this more, since there is a |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 475 | case in which it needs to be bigger still to handle a |
| 476 | malformed response to transact2 findfirst from WinXP when |
| 477 | access denied is returned and thus bcc and wct are zero |
| 478 | but server says length is 0x21 bytes too long as if the server |
| 479 | forget to reset the smb rfc1001 length when it reset the |
| 480 | wct and bcc to minimum size and drop the t2 parms and data */ |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 481 | if ((4+len > clc_len) && (len <= clc_len + 512)) |
Steve French | 190fdeb | 2005-10-10 11:48:26 -0700 | [diff] [blame] | 482 | return 0; |
Steve French | 46c79a6 | 2006-03-02 00:07:08 +0000 | [diff] [blame] | 483 | else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 484 | cERROR(1, "RFC1001 size %d bigger than SMB for Mid=%d", |
| 485 | len, smb->Mid); |
Steve French | 190fdeb | 2005-10-10 11:48:26 -0700 | [diff] [blame] | 486 | return 1; |
Steve French | 46c79a6 | 2006-03-02 00:07:08 +0000 | [diff] [blame] | 487 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | } |
Steve French | 2096243 | 2005-09-21 22:05:57 -0700 | [diff] [blame] | 489 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | } |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 491 | |
| 492 | bool |
Steve French | d7c8c94 | 2006-03-03 10:43:49 +0000 | [diff] [blame] | 493 | is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv) |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 494 | { |
| 495 | struct smb_com_lock_req *pSMB = (struct smb_com_lock_req *)buf; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 496 | struct list_head *tmp, *tmp1, *tmp2; |
| 497 | struct cifsSesInfo *ses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | struct cifsTconInfo *tcon; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 499 | struct cifsInodeInfo *pCifsInode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | struct cifsFileInfo *netfile; |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 501 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 503 | cFYI(1, "Checking for oplock break or dnotify response"); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 504 | if ((pSMB->hdr.Command == SMB_COM_NT_TRANSACT) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | (pSMB->hdr.Flags & SMBFLG_RESPONSE)) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 506 | struct smb_com_transaction_change_notify_rsp *pSMBr = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | (struct smb_com_transaction_change_notify_rsp *)buf; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 508 | struct file_notify_information *pnotify; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | __u32 data_offset = 0; |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 510 | if (pSMBr->ByteCount > sizeof(struct file_notify_information)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | data_offset = le32_to_cpu(pSMBr->DataOffset); |
| 512 | |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 513 | pnotify = (struct file_notify_information *) |
| 514 | ((char *)&pSMBr->hdr.Protocol + data_offset); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 515 | cFYI(1, "dnotify on %s Action: 0x%x", |
| 516 | pnotify->FileName, pnotify->Action); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 517 | /* cifs_dump_mem("Rcvd notify Data: ",buf, |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 518 | sizeof(struct smb_hdr)+60); */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 519 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | } |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 521 | if (pSMBr->hdr.Status.CifsError) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 522 | cFYI(1, "notify err 0x%d", |
| 523 | pSMBr->hdr.Status.CifsError); |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 524 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | } |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 526 | return false; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 527 | } |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 528 | if (pSMB->hdr.Command != SMB_COM_LOCKING_ANDX) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 529 | return false; |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 530 | if (pSMB->hdr.Flags & SMBFLG_RESPONSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | /* no sense logging error on invalid handle on oplock |
| 532 | break - harmless race between close request and oplock |
| 533 | break response is expected from time to time writing out |
| 534 | large dirty files cached on the client */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 535 | if ((NT_STATUS_INVALID_HANDLE) == |
| 536 | le32_to_cpu(pSMB->hdr.Status.CifsError)) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 537 | cFYI(1, "invalid handle on oplock break"); |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 538 | return true; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 539 | } else if (ERRbadfid == |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | le16_to_cpu(pSMB->hdr.Status.DosError.Error)) { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 541 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | } else { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 543 | return false; /* on valid oplock brk we get "request" */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } |
| 545 | } |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 546 | if (pSMB->hdr.WordCount != 8) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 547 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 549 | cFYI(1, "oplock type 0x%d level 0x%d", |
| 550 | pSMB->LockType, pSMB->OplockLevel); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 551 | if (!(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 552 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
| 554 | /* look up tcon based on tid & uid */ |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 555 | read_lock(&cifs_tcp_ses_lock); |
| 556 | list_for_each(tmp, &srv->smb_ses_list) { |
| 557 | ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); |
| 558 | list_for_each(tmp1, &ses->tcon_list) { |
| 559 | tcon = list_entry(tmp1, struct cifsTconInfo, tcon_list); |
| 560 | if (tcon->tid != buf->Tid) |
| 561 | continue; |
| 562 | |
Steve French | a454434 | 2005-08-24 13:59:35 -0700 | [diff] [blame] | 563 | cifs_stats_inc(&tcon->num_oplock_brks); |
Jeff Layton | 058daf4 | 2009-09-12 11:54:29 -0400 | [diff] [blame] | 564 | read_lock(&GlobalSMBSeslock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 565 | list_for_each(tmp2, &tcon->openFileList) { |
| 566 | netfile = list_entry(tmp2, struct cifsFileInfo, |
Steve French | 57337e4 | 2005-04-28 22:41:10 -0700 | [diff] [blame] | 567 | tlist); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 568 | if (pSMB->Fid != netfile->netfid) |
| 569 | continue; |
| 570 | |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 571 | /* |
| 572 | * don't do anything if file is about to be |
| 573 | * closed anyway. |
| 574 | */ |
| 575 | if (netfile->closePend) { |
| 576 | read_unlock(&GlobalSMBSeslock); |
| 577 | read_unlock(&cifs_tcp_ses_lock); |
| 578 | return true; |
| 579 | } |
| 580 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 581 | cFYI(1, "file id match, oplock break"); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 582 | pCifsInode = CIFS_I(netfile->pInode); |
| 583 | pCifsInode->clientCanCacheAll = false; |
| 584 | if (pSMB->OplockLevel == 0) |
| 585 | pCifsInode->clientCanCacheRead = false; |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 586 | rc = slow_work_enqueue(&netfile->oplock_break); |
| 587 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 588 | cERROR(1, "failed to enqueue oplock " |
| 589 | "break: %d\n", rc); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 590 | } else { |
| 591 | netfile->oplock_break_cancelled = false; |
| 592 | } |
| 593 | read_unlock(&GlobalSMBSeslock); |
| 594 | read_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 595 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | } |
Jeff Layton | 058daf4 | 2009-09-12 11:54:29 -0400 | [diff] [blame] | 597 | read_unlock(&GlobalSMBSeslock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 598 | read_unlock(&cifs_tcp_ses_lock); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 599 | cFYI(1, "No matching file for oplock break"); |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 600 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | } |
| 602 | } |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 603 | read_unlock(&cifs_tcp_ses_lock); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 604 | cFYI(1, "Can not process oplock break for non-existent connection"); |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 605 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | void |
| 609 | dump_smb(struct smb_hdr *smb_buf, int smb_buf_length) |
| 610 | { |
| 611 | int i, j; |
| 612 | char debug_line[17]; |
| 613 | unsigned char *buffer; |
| 614 | |
| 615 | if (traceSMB == 0) |
| 616 | return; |
| 617 | |
| 618 | buffer = (unsigned char *) smb_buf; |
| 619 | for (i = 0, j = 0; i < smb_buf_length; i++, j++) { |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 620 | if (i % 8 == 0) { |
| 621 | /* have reached the beginning of line */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | printk(KERN_DEBUG "| "); |
| 623 | j = 0; |
| 624 | } |
| 625 | printk("%0#4x ", buffer[i]); |
| 626 | debug_line[2 * j] = ' '; |
| 627 | if (isprint(buffer[i])) |
| 628 | debug_line[1 + (2 * j)] = buffer[i]; |
| 629 | else |
| 630 | debug_line[1 + (2 * j)] = '_'; |
| 631 | |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 632 | if (i % 8 == 7) { |
| 633 | /* reached end of line, time to print ascii */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | debug_line[16] = 0; |
| 635 | printk(" | %s\n", debug_line); |
| 636 | } |
| 637 | } |
| 638 | for (; j < 8; j++) { |
| 639 | printk(" "); |
| 640 | debug_line[2 * j] = ' '; |
| 641 | debug_line[1 + (2 * j)] = ' '; |
| 642 | } |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 643 | printk(" | %s\n", debug_line); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | return; |
| 645 | } |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 646 | |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 647 | /* Convert 16 bit Unicode pathname to wire format from string in current code |
| 648 | page. Conversion may involve remapping up the seven characters that are |
| 649 | only legal in POSIX-like OS (if they are present in the string). Path |
| 650 | names are little endian 16 bit Unicode on the wire */ |
| 651 | int |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 652 | cifsConvertToUCS(__le16 *target, const char *source, int maxlen, |
| 653 | const struct nls_table *cp, int mapChars) |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 654 | { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 655 | int i, j, charlen; |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 656 | int len_remaining = maxlen; |
| 657 | char src_char; |
Steve French | 70ca734 | 2005-09-22 16:32:06 -0700 | [diff] [blame] | 658 | __u16 temp; |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 659 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 660 | if (!mapChars) |
Steve French | e89dc92 | 2005-11-11 15:18:19 -0800 | [diff] [blame] | 661 | return cifs_strtoUCS(target, source, PATH_MAX, cp); |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 662 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 663 | for (i = 0, j = 0; i < maxlen; j++) { |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 664 | src_char = source[i]; |
| 665 | switch (src_char) { |
| 666 | case 0: |
Steve French | f4cfd69 | 2005-07-14 18:29:02 -0500 | [diff] [blame] | 667 | target[j] = 0; |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 668 | goto ctoUCS_out; |
| 669 | case ':': |
| 670 | target[j] = cpu_to_le16(UNI_COLON); |
| 671 | break; |
| 672 | case '*': |
| 673 | target[j] = cpu_to_le16(UNI_ASTERIK); |
| 674 | break; |
| 675 | case '?': |
| 676 | target[j] = cpu_to_le16(UNI_QUESTION); |
| 677 | break; |
| 678 | case '<': |
| 679 | target[j] = cpu_to_le16(UNI_LESSTHAN); |
| 680 | break; |
| 681 | case '>': |
| 682 | target[j] = cpu_to_le16(UNI_GRTRTHAN); |
| 683 | break; |
| 684 | case '|': |
| 685 | target[j] = cpu_to_le16(UNI_PIPE); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 686 | break; |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 687 | /* BB We can not handle remapping slash until |
| 688 | all the calls to build_path_from_dentry |
| 689 | are modified, as they use slash as separator BB */ |
| 690 | /* case '\\': |
| 691 | target[j] = cpu_to_le16(UNI_SLASH); |
| 692 | break;*/ |
| 693 | default: |
| 694 | charlen = cp->char2uni(source+i, |
Steve French | 70ca734 | 2005-09-22 16:32:06 -0700 | [diff] [blame] | 695 | len_remaining, &temp); |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 696 | /* if no match, use question mark, which |
| 697 | at least in some cases servers as wild card */ |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 698 | if (charlen < 1) { |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 699 | target[j] = cpu_to_le16(0x003f); |
| 700 | charlen = 1; |
Steve French | 70ca734 | 2005-09-22 16:32:06 -0700 | [diff] [blame] | 701 | } else |
| 702 | target[j] = cpu_to_le16(temp); |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 703 | len_remaining -= charlen; |
| 704 | /* character may take more than one byte in the |
| 705 | the source string, but will take exactly two |
| 706 | bytes in the target string */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 707 | i += charlen; |
Steve French | 6c91d36 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 708 | continue; |
| 709 | } |
| 710 | i++; /* move to next char in source string */ |
| 711 | len_remaining--; |
| 712 | } |
| 713 | |
| 714 | ctoUCS_out: |
| 715 | return i; |
| 716 | } |
Jeff Layton | ec06aed | 2009-11-06 14:18:29 -0500 | [diff] [blame] | 717 | |
| 718 | void |
| 719 | cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb) |
| 720 | { |
| 721 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
Suresh Jayaraman | f534dc9 | 2009-11-16 12:03:16 +0530 | [diff] [blame] | 722 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 723 | cERROR(1, "Autodisabling the use of server inode numbers on " |
Jeff Layton | ec06aed | 2009-11-06 14:18:29 -0500 | [diff] [blame] | 724 | "%s. This server doesn't seem to support them " |
| 725 | "properly. Hardlinks will not be recognized on this " |
| 726 | "mount. Consider mounting with the \"noserverino\" " |
| 727 | "option to silence this message.", |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 728 | cifs_sb->tcon->treeName); |
Jeff Layton | ec06aed | 2009-11-06 14:18:29 -0500 | [diff] [blame] | 729 | } |
| 730 | } |