Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/transport.c |
| 3 | * |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2005 |
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 |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #include <linux/fs.h> |
| 23 | #include <linux/list.h> |
| 24 | #include <linux/wait.h> |
| 25 | #include <linux/net.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <asm/uaccess.h> |
| 28 | #include <asm/processor.h> |
| 29 | #include <linux/mempool.h> |
| 30 | #include "cifspdu.h" |
| 31 | #include "cifsglob.h" |
| 32 | #include "cifsproto.h" |
| 33 | #include "cifs_debug.h" |
| 34 | |
| 35 | extern mempool_t *cifs_mid_poolp; |
| 36 | extern kmem_cache_t *cifs_oplock_cachep; |
| 37 | |
| 38 | static struct mid_q_entry * |
| 39 | AllocMidQEntry(struct smb_hdr *smb_buffer, struct cifsSesInfo *ses) |
| 40 | { |
| 41 | struct mid_q_entry *temp; |
| 42 | |
| 43 | if (ses == NULL) { |
Steve French | 275cde1 | 2005-04-28 22:41:10 -0700 | [diff] [blame] | 44 | cERROR(1, ("Null session passed in to AllocMidQEntry")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | return NULL; |
| 46 | } |
| 47 | if (ses->server == NULL) { |
| 48 | cERROR(1, ("Null TCP session in AllocMidQEntry")); |
| 49 | return NULL; |
| 50 | } |
| 51 | |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 52 | temp = (struct mid_q_entry *) mempool_alloc(cifs_mid_poolp, |
| 53 | SLAB_KERNEL | SLAB_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | if (temp == NULL) |
| 55 | return temp; |
| 56 | else { |
| 57 | memset(temp, 0, sizeof (struct mid_q_entry)); |
| 58 | temp->mid = smb_buffer->Mid; /* always LE */ |
| 59 | temp->pid = current->pid; |
| 60 | temp->command = smb_buffer->Command; |
| 61 | cFYI(1, ("For smb_command %d", temp->command)); |
Steve French | 1047abc | 2005-10-11 19:58:06 -0700 | [diff] [blame] | 62 | /* do_gettimeofday(&temp->when_sent);*/ /* easier to use jiffies */ |
| 63 | /* when mid allocated can be before when sent */ |
| 64 | temp->when_alloc = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | temp->ses = ses; |
| 66 | temp->tsk = current; |
| 67 | } |
| 68 | |
| 69 | spin_lock(&GlobalMid_Lock); |
| 70 | list_add_tail(&temp->qhead, &ses->server->pending_mid_q); |
| 71 | atomic_inc(&midCount); |
| 72 | temp->midState = MID_REQUEST_ALLOCATED; |
| 73 | spin_unlock(&GlobalMid_Lock); |
| 74 | return temp; |
| 75 | } |
| 76 | |
| 77 | static void |
| 78 | DeleteMidQEntry(struct mid_q_entry *midEntry) |
| 79 | { |
Steve French | 1047abc | 2005-10-11 19:58:06 -0700 | [diff] [blame] | 80 | #ifdef CONFIG_CIFS_STATS2 |
| 81 | unsigned long now; |
| 82 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | spin_lock(&GlobalMid_Lock); |
| 84 | midEntry->midState = MID_FREE; |
| 85 | list_del(&midEntry->qhead); |
| 86 | atomic_dec(&midCount); |
| 87 | spin_unlock(&GlobalMid_Lock); |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 88 | if(midEntry->largeBuf) |
| 89 | cifs_buf_release(midEntry->resp_buf); |
| 90 | else |
| 91 | cifs_small_buf_release(midEntry->resp_buf); |
Steve French | 1047abc | 2005-10-11 19:58:06 -0700 | [diff] [blame] | 92 | #ifdef CONFIG_CIFS_STATS2 |
| 93 | now = jiffies; |
| 94 | /* commands taking longer than one second are indications that |
| 95 | something is wrong, unless it is quite a slow link or server */ |
| 96 | if((now - midEntry->when_alloc) > HZ) { |
| 97 | if((cifsFYI & CIFS_TIMER) && |
| 98 | (midEntry->command != SMB_COM_LOCKING_ANDX)) { |
| 99 | printk(KERN_DEBUG " CIFS slow rsp: cmd %d mid %d", |
| 100 | midEntry->command, midEntry->mid); |
| 101 | printk(" A: 0x%lx S: 0x%lx R: 0x%lx\n", |
| 102 | now - midEntry->when_alloc, |
| 103 | now - midEntry->when_sent, |
| 104 | now - midEntry->when_received); |
| 105 | } |
| 106 | } |
| 107 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | mempool_free(midEntry, cifs_mid_poolp); |
| 109 | } |
| 110 | |
| 111 | struct oplock_q_entry * |
| 112 | AllocOplockQEntry(struct inode * pinode, __u16 fid, struct cifsTconInfo * tcon) |
| 113 | { |
| 114 | struct oplock_q_entry *temp; |
| 115 | if ((pinode== NULL) || (tcon == NULL)) { |
| 116 | cERROR(1, ("Null parms passed to AllocOplockQEntry")); |
| 117 | return NULL; |
| 118 | } |
| 119 | temp = (struct oplock_q_entry *) kmem_cache_alloc(cifs_oplock_cachep, |
| 120 | SLAB_KERNEL); |
| 121 | if (temp == NULL) |
| 122 | return temp; |
| 123 | else { |
| 124 | temp->pinode = pinode; |
| 125 | temp->tcon = tcon; |
| 126 | temp->netfid = fid; |
| 127 | spin_lock(&GlobalMid_Lock); |
| 128 | list_add_tail(&temp->qhead, &GlobalOplock_Q); |
| 129 | spin_unlock(&GlobalMid_Lock); |
| 130 | } |
| 131 | return temp; |
| 132 | |
| 133 | } |
| 134 | |
| 135 | void DeleteOplockQEntry(struct oplock_q_entry * oplockEntry) |
| 136 | { |
| 137 | spin_lock(&GlobalMid_Lock); |
| 138 | /* should we check if list empty first? */ |
| 139 | list_del(&oplockEntry->qhead); |
| 140 | spin_unlock(&GlobalMid_Lock); |
| 141 | kmem_cache_free(cifs_oplock_cachep, oplockEntry); |
| 142 | } |
| 143 | |
| 144 | int |
| 145 | smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer, |
| 146 | unsigned int smb_buf_length, struct sockaddr *sin) |
| 147 | { |
| 148 | int rc = 0; |
| 149 | int i = 0; |
| 150 | struct msghdr smb_msg; |
| 151 | struct kvec iov; |
| 152 | unsigned len = smb_buf_length + 4; |
| 153 | |
| 154 | if(ssocket == NULL) |
| 155 | return -ENOTSOCK; /* BB eventually add reconnect code here */ |
| 156 | iov.iov_base = smb_buffer; |
| 157 | iov.iov_len = len; |
| 158 | |
| 159 | smb_msg.msg_name = sin; |
| 160 | smb_msg.msg_namelen = sizeof (struct sockaddr); |
| 161 | smb_msg.msg_control = NULL; |
| 162 | smb_msg.msg_controllen = 0; |
| 163 | smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL; /* BB add more flags?*/ |
| 164 | |
| 165 | /* smb header is converted in header_assemble. bcc and rest of SMB word |
| 166 | area, and byte area if necessary, is converted to littleendian in |
| 167 | cifssmb.c and RFC1001 len is converted to bigendian in smb_send |
| 168 | Flags2 is converted in SendReceive */ |
| 169 | |
| 170 | smb_buffer->smb_buf_length = cpu_to_be32(smb_buffer->smb_buf_length); |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 171 | cFYI(1, ("Sending smb of length %d", smb_buf_length)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | dump_smb(smb_buffer, len); |
| 173 | |
| 174 | while (len > 0) { |
| 175 | rc = kernel_sendmsg(ssocket, &smb_msg, &iov, 1, len); |
| 176 | if ((rc == -ENOSPC) || (rc == -EAGAIN)) { |
| 177 | i++; |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 178 | /* smaller timeout here than send2 since smaller size */ |
| 179 | /* Although it may not be required, this also is smaller |
| 180 | oplock break time */ |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 181 | if(i > 12) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | cERROR(1, |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 183 | ("sends on sock %p stuck for 7 seconds", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | ssocket)); |
| 185 | rc = -EAGAIN; |
| 186 | break; |
| 187 | } |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 188 | msleep(1 << i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | continue; |
| 190 | } |
| 191 | if (rc < 0) |
| 192 | break; |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 193 | else |
| 194 | i = 0; /* reset i after each successful send */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | iov.iov_base += rc; |
| 196 | iov.iov_len -= rc; |
| 197 | len -= rc; |
| 198 | } |
| 199 | |
| 200 | if (rc < 0) { |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 201 | cERROR(1,("Error %d sending data on socket to server", rc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } else { |
| 203 | rc = 0; |
| 204 | } |
| 205 | |
| 206 | return rc; |
| 207 | } |
| 208 | |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 209 | static int |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 210 | smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec, |
| 211 | struct sockaddr *sin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | { |
| 213 | int rc = 0; |
| 214 | int i = 0; |
| 215 | struct msghdr smb_msg; |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 216 | struct smb_hdr *smb_buffer = iov[0].iov_base; |
| 217 | unsigned int len = iov[0].iov_len; |
| 218 | unsigned int total_len; |
| 219 | int first_vec = 0; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | if(ssocket == NULL) |
| 222 | return -ENOTSOCK; /* BB eventually add reconnect code here */ |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | smb_msg.msg_name = sin; |
| 225 | smb_msg.msg_namelen = sizeof (struct sockaddr); |
| 226 | smb_msg.msg_control = NULL; |
| 227 | smb_msg.msg_controllen = 0; |
| 228 | smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL; /* BB add more flags?*/ |
| 229 | |
| 230 | /* smb header is converted in header_assemble. bcc and rest of SMB word |
| 231 | area, and byte area if necessary, is converted to littleendian in |
| 232 | cifssmb.c and RFC1001 len is converted to bigendian in smb_send |
| 233 | Flags2 is converted in SendReceive */ |
| 234 | |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 235 | |
| 236 | total_len = 0; |
| 237 | for (i = 0; i < n_vec; i++) |
| 238 | total_len += iov[i].iov_len; |
| 239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | smb_buffer->smb_buf_length = cpu_to_be32(smb_buffer->smb_buf_length); |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 241 | cFYI(1, ("Sending smb: total_len %d", total_len)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | dump_smb(smb_buffer, len); |
| 243 | |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 244 | while (total_len) { |
| 245 | rc = kernel_sendmsg(ssocket, &smb_msg, &iov[first_vec], |
| 246 | n_vec - first_vec, total_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | if ((rc == -ENOSPC) || (rc == -EAGAIN)) { |
| 248 | i++; |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 249 | if(i >= 14) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | cERROR(1, |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 251 | ("sends on sock %p stuck for 15 seconds", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | ssocket)); |
| 253 | rc = -EAGAIN; |
| 254 | break; |
| 255 | } |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 256 | msleep(1 << i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | continue; |
| 258 | } |
| 259 | if (rc < 0) |
| 260 | break; |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 261 | |
| 262 | if (rc >= total_len) { |
| 263 | WARN_ON(rc > total_len); |
| 264 | break; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 265 | } |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 266 | if(rc == 0) { |
| 267 | /* should never happen, letting socket clear before |
| 268 | retrying is our only obvious option here */ |
Steve French | 04c0881 | 2005-10-03 19:33:15 -0700 | [diff] [blame] | 269 | cERROR(1,("tcp sent no data")); |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 270 | msleep(500); |
| 271 | continue; |
| 272 | } |
| 273 | total_len -= rc; |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 274 | /* the line below resets i */ |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 275 | for (i = first_vec; i < n_vec; i++) { |
| 276 | if (iov[i].iov_len) { |
| 277 | if (rc > iov[i].iov_len) { |
| 278 | rc -= iov[i].iov_len; |
| 279 | iov[i].iov_len = 0; |
| 280 | } else { |
| 281 | iov[i].iov_base += rc; |
| 282 | iov[i].iov_len -= rc; |
| 283 | first_vec = i; |
| 284 | break; |
| 285 | } |
| 286 | } |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 287 | } |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 288 | i = 0; /* in case we get ENOSPC on the next send */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | if (rc < 0) { |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 292 | cERROR(1,("Error %d sending data on socket to server", rc)); |
| 293 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
| 296 | return rc; |
| 297 | } |
| 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | int |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 300 | SendReceive2(const unsigned int xid, struct cifsSesInfo *ses, |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 301 | struct kvec *iov, int n_vec, int * pRespBufType /* ret */, |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 302 | const int long_op) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
| 304 | int rc = 0; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 305 | unsigned int receive_len; |
| 306 | unsigned long timeout; |
| 307 | struct mid_q_entry *midQ; |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 308 | struct smb_hdr *in_buf = iov[0].iov_base; |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 309 | |
| 310 | *pRespBufType = CIFS_NO_BUFFER; /* no response buf yet */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 312 | if ((ses == NULL) || (ses->server == NULL)) { |
| 313 | cifs_small_buf_release(in_buf); |
| 314 | cERROR(1,("Null session")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | return -EIO; |
| 316 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 318 | if(ses->server->tcpStatus == CifsExiting) { |
| 319 | cifs_small_buf_release(in_buf); |
Steve French | 31ca3bc | 2005-04-28 22:41:11 -0700 | [diff] [blame] | 320 | return -ENOENT; |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 321 | } |
Steve French | 31ca3bc | 2005-04-28 22:41:11 -0700 | [diff] [blame] | 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | /* Ensure that we do not send more than 50 overlapping requests |
| 324 | to the same server. We may make this configurable later or |
| 325 | use ses->maxReq */ |
| 326 | if(long_op == -1) { |
| 327 | /* oplock breaks must not be held up */ |
| 328 | atomic_inc(&ses->server->inFlight); |
| 329 | } else { |
| 330 | spin_lock(&GlobalMid_Lock); |
| 331 | while(1) { |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 332 | if(atomic_read(&ses->server->inFlight) >= |
| 333 | cifs_max_pending){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | spin_unlock(&GlobalMid_Lock); |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 335 | #ifdef CONFIG_CIFS_STATS2 |
| 336 | atomic_inc(&ses->server->num_waiters); |
| 337 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | wait_event(ses->server->request_q, |
| 339 | atomic_read(&ses->server->inFlight) |
| 340 | < cifs_max_pending); |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 341 | #ifdef CONFIG_CIFS_STATS2 |
| 342 | atomic_dec(&ses->server->num_waiters); |
| 343 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | spin_lock(&GlobalMid_Lock); |
| 345 | } else { |
| 346 | if(ses->server->tcpStatus == CifsExiting) { |
| 347 | spin_unlock(&GlobalMid_Lock); |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 348 | cifs_small_buf_release(in_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | return -ENOENT; |
| 350 | } |
| 351 | |
| 352 | /* can not count locking commands against total since |
| 353 | they are allowed to block on server */ |
| 354 | |
| 355 | if(long_op < 3) { |
| 356 | /* update # of requests on the wire to server */ |
| 357 | atomic_inc(&ses->server->inFlight); |
| 358 | } |
| 359 | spin_unlock(&GlobalMid_Lock); |
| 360 | break; |
| 361 | } |
| 362 | } |
| 363 | } |
| 364 | /* make sure that we sign in the same order that we send on this socket |
| 365 | and avoid races inside tcp sendmsg code that could cause corruption |
| 366 | of smb data */ |
| 367 | |
| 368 | down(&ses->server->tcpSem); |
| 369 | |
| 370 | if (ses->server->tcpStatus == CifsExiting) { |
| 371 | rc = -ENOENT; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 372 | goto out_unlock2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | } else if (ses->server->tcpStatus == CifsNeedReconnect) { |
| 374 | cFYI(1,("tcp session dead - return to caller to retry")); |
| 375 | rc = -EAGAIN; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 376 | goto out_unlock2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } else if (ses->status != CifsGood) { |
| 378 | /* check if SMB session is bad because we are setting it up */ |
| 379 | if((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) && |
| 380 | (in_buf->Command != SMB_COM_NEGOTIATE)) { |
| 381 | rc = -EAGAIN; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 382 | goto out_unlock2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } /* else ok - we are setting up session */ |
| 384 | } |
| 385 | midQ = AllocMidQEntry(in_buf, ses); |
| 386 | if (midQ == NULL) { |
| 387 | up(&ses->server->tcpSem); |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 388 | cifs_small_buf_release(in_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | /* If not lock req, update # of requests on wire to server */ |
| 390 | if(long_op < 3) { |
| 391 | atomic_dec(&ses->server->inFlight); |
| 392 | wake_up(&ses->server->request_q); |
| 393 | } |
| 394 | return -ENOMEM; |
| 395 | } |
| 396 | |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 397 | rc = cifs_sign_smb2(iov, n_vec, ses->server, &midQ->sequence_number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
| 399 | midQ->midState = MID_REQUEST_SUBMITTED; |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 400 | #ifdef CONFIG_CIFS_STATS2 |
| 401 | atomic_inc(&ses->server->inSend); |
| 402 | #endif |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 403 | rc = smb_send2(ses->server->ssocket, iov, n_vec, |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 404 | (struct sockaddr *) &(ses->server->addr.sockAddr)); |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 405 | #ifdef CONFIG_CIFS_STATS2 |
| 406 | atomic_dec(&ses->server->inSend); |
Steve French | 1047abc | 2005-10-11 19:58:06 -0700 | [diff] [blame] | 407 | midQ->when_sent = jiffies; |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 408 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | if(rc < 0) { |
| 410 | DeleteMidQEntry(midQ); |
| 411 | up(&ses->server->tcpSem); |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 412 | cifs_small_buf_release(in_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | /* If not lock req, update # of requests on wire to server */ |
| 414 | if(long_op < 3) { |
| 415 | atomic_dec(&ses->server->inFlight); |
| 416 | wake_up(&ses->server->request_q); |
| 417 | } |
| 418 | return rc; |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 419 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | up(&ses->server->tcpSem); |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 421 | cifs_small_buf_release(in_buf); |
| 422 | } |
| 423 | |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 424 | if (long_op == -1) |
| 425 | goto cifs_no_response_exit2; |
| 426 | else if (long_op == 2) /* writes past end of file can take loong time */ |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 427 | timeout = 180 * HZ; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 428 | else if (long_op == 1) |
| 429 | timeout = 45 * HZ; /* should be greater than |
| 430 | servers oplock break timeout (about 43 seconds) */ |
| 431 | else if (long_op > 2) { |
| 432 | timeout = MAX_SCHEDULE_TIMEOUT; |
| 433 | } else |
| 434 | timeout = 15 * HZ; |
| 435 | /* wait for 15 seconds or until woken up due to response arriving or |
| 436 | due to last connection to this server being unmounted */ |
| 437 | if (signal_pending(current)) { |
| 438 | /* if signal pending do not hold up user for full smb timeout |
| 439 | but we still give response a change to complete */ |
| 440 | timeout = 2 * HZ; |
| 441 | } |
| 442 | |
| 443 | /* No user interrupts in wait - wreaks havoc with performance */ |
| 444 | if(timeout != MAX_SCHEDULE_TIMEOUT) { |
| 445 | timeout += jiffies; |
| 446 | wait_event(ses->server->response_q, |
| 447 | (!(midQ->midState & MID_REQUEST_SUBMITTED)) || |
| 448 | time_after(jiffies, timeout) || |
| 449 | ((ses->server->tcpStatus != CifsGood) && |
| 450 | (ses->server->tcpStatus != CifsNew))); |
| 451 | } else { |
| 452 | wait_event(ses->server->response_q, |
| 453 | (!(midQ->midState & MID_REQUEST_SUBMITTED)) || |
| 454 | ((ses->server->tcpStatus != CifsGood) && |
| 455 | (ses->server->tcpStatus != CifsNew))); |
| 456 | } |
| 457 | |
| 458 | spin_lock(&GlobalMid_Lock); |
| 459 | if (midQ->resp_buf) { |
| 460 | spin_unlock(&GlobalMid_Lock); |
Steve French | 70ca734 | 2005-09-22 16:32:06 -0700 | [diff] [blame] | 461 | receive_len = midQ->resp_buf->smb_buf_length; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 462 | } else { |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 463 | cERROR(1,("No response to cmd %d mid %d", |
| 464 | midQ->command, midQ->mid)); |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 465 | if(midQ->midState == MID_REQUEST_SUBMITTED) { |
| 466 | if(ses->server->tcpStatus == CifsExiting) |
| 467 | rc = -EHOSTDOWN; |
| 468 | else { |
| 469 | ses->server->tcpStatus = CifsNeedReconnect; |
| 470 | midQ->midState = MID_RETRY_NEEDED; |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | if (rc != -EHOSTDOWN) { |
| 475 | if(midQ->midState == MID_RETRY_NEEDED) { |
| 476 | rc = -EAGAIN; |
| 477 | cFYI(1,("marking request for retry")); |
| 478 | } else { |
| 479 | rc = -EIO; |
| 480 | } |
| 481 | } |
| 482 | spin_unlock(&GlobalMid_Lock); |
| 483 | DeleteMidQEntry(midQ); |
| 484 | /* If not lock req, update # of requests on wire to server */ |
| 485 | if(long_op < 3) { |
| 486 | atomic_dec(&ses->server->inFlight); |
| 487 | wake_up(&ses->server->request_q); |
| 488 | } |
| 489 | return rc; |
| 490 | } |
| 491 | |
| 492 | if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) { |
| 493 | cERROR(1, ("Frame too large received. Length: %d Xid: %d", |
| 494 | receive_len, xid)); |
| 495 | rc = -EIO; |
| 496 | } else { /* rcvd frame is ok */ |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 497 | if (midQ->resp_buf && |
| 498 | (midQ->midState == MID_RESPONSE_RECEIVED)) { |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 499 | |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 500 | iov[0].iov_base = (char *)midQ->resp_buf; |
| 501 | if(midQ->largeBuf) |
| 502 | *pRespBufType = CIFS_LARGE_BUFFER; |
| 503 | else |
| 504 | *pRespBufType = CIFS_SMALL_BUFFER; |
| 505 | iov[0].iov_len = receive_len + 4; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 506 | |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 507 | dump_smb(midQ->resp_buf, 80); |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 508 | /* convert the length into a more usable form */ |
| 509 | if((receive_len > 24) && |
| 510 | (ses->server->secMode & (SECMODE_SIGN_REQUIRED | |
| 511 | SECMODE_SIGN_ENABLED))) { |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 512 | rc = cifs_verify_signature(midQ->resp_buf, |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 513 | ses->server->mac_signing_key, |
| 514 | midQ->sequence_number+1); |
| 515 | if(rc) { |
| 516 | cERROR(1,("Unexpected SMB signature")); |
| 517 | /* BB FIXME add code to kill session */ |
| 518 | } |
| 519 | } |
| 520 | |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 521 | /* BB special case reconnect tid and uid here? */ |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 522 | /* BB special case Errbadpassword and pwdexpired here */ |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 523 | rc = map_smb_to_linux_error(midQ->resp_buf); |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 524 | |
| 525 | /* convert ByteCount if necessary */ |
| 526 | if (receive_len >= |
| 527 | sizeof (struct smb_hdr) - |
| 528 | 4 /* do not count RFC1001 header */ + |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 529 | (2 * midQ->resp_buf->WordCount) + 2 /* bcc */ ) |
| 530 | BCC(midQ->resp_buf) = |
| 531 | le16_to_cpu(BCC_LE(midQ->resp_buf)); |
| 532 | midQ->resp_buf = NULL; /* mark it so will not be freed |
| 533 | by DeleteMidQEntry */ |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 534 | } else { |
| 535 | rc = -EIO; |
Steve French | ab2f218 | 2005-09-15 20:44:50 -0700 | [diff] [blame] | 536 | cFYI(1,("Bad MID state?")); |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 537 | } |
| 538 | } |
| 539 | cifs_no_response_exit2: |
| 540 | DeleteMidQEntry(midQ); |
| 541 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | if(long_op < 3) { |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 543 | atomic_dec(&ses->server->inFlight); |
| 544 | wake_up(&ses->server->request_q); |
| 545 | } |
| 546 | |
| 547 | return rc; |
| 548 | |
| 549 | out_unlock2: |
| 550 | up(&ses->server->tcpSem); |
Steve French | 4b8f930 | 2006-02-26 16:41:18 +0000 | [diff] [blame] | 551 | cifs_small_buf_release(in_buf); |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 552 | /* If not lock req, update # of requests on wire to server */ |
| 553 | if(long_op < 3) { |
| 554 | atomic_dec(&ses->server->inFlight); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | wake_up(&ses->server->request_q); |
| 556 | } |
| 557 | |
| 558 | return rc; |
| 559 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
| 561 | int |
| 562 | SendReceive(const unsigned int xid, struct cifsSesInfo *ses, |
| 563 | struct smb_hdr *in_buf, struct smb_hdr *out_buf, |
| 564 | int *pbytes_returned, const int long_op) |
| 565 | { |
| 566 | int rc = 0; |
| 567 | unsigned int receive_len; |
| 568 | unsigned long timeout; |
| 569 | struct mid_q_entry *midQ; |
| 570 | |
| 571 | if (ses == NULL) { |
| 572 | cERROR(1,("Null smb session")); |
| 573 | return -EIO; |
| 574 | } |
| 575 | if(ses->server == NULL) { |
| 576 | cERROR(1,("Null tcp session")); |
| 577 | return -EIO; |
| 578 | } |
| 579 | |
Steve French | 31ca3bc | 2005-04-28 22:41:11 -0700 | [diff] [blame] | 580 | if(ses->server->tcpStatus == CifsExiting) |
| 581 | return -ENOENT; |
| 582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | /* Ensure that we do not send more than 50 overlapping requests |
| 584 | to the same server. We may make this configurable later or |
| 585 | use ses->maxReq */ |
| 586 | if(long_op == -1) { |
| 587 | /* oplock breaks must not be held up */ |
| 588 | atomic_inc(&ses->server->inFlight); |
| 589 | } else { |
| 590 | spin_lock(&GlobalMid_Lock); |
| 591 | while(1) { |
Steve French | 275cde1 | 2005-04-28 22:41:10 -0700 | [diff] [blame] | 592 | if(atomic_read(&ses->server->inFlight) >= |
| 593 | cifs_max_pending){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | spin_unlock(&GlobalMid_Lock); |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 595 | #ifdef CONFIG_CIFS_STATS2 |
| 596 | atomic_inc(&ses->server->num_waiters); |
| 597 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | wait_event(ses->server->request_q, |
| 599 | atomic_read(&ses->server->inFlight) |
| 600 | < cifs_max_pending); |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 601 | #ifdef CONFIG_CIFS_STATS2 |
| 602 | atomic_dec(&ses->server->num_waiters); |
| 603 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | spin_lock(&GlobalMid_Lock); |
| 605 | } else { |
| 606 | if(ses->server->tcpStatus == CifsExiting) { |
| 607 | spin_unlock(&GlobalMid_Lock); |
| 608 | return -ENOENT; |
| 609 | } |
| 610 | |
| 611 | /* can not count locking commands against total since |
| 612 | they are allowed to block on server */ |
| 613 | |
| 614 | if(long_op < 3) { |
| 615 | /* update # of requests on the wire to server */ |
| 616 | atomic_inc(&ses->server->inFlight); |
| 617 | } |
| 618 | spin_unlock(&GlobalMid_Lock); |
| 619 | break; |
| 620 | } |
| 621 | } |
| 622 | } |
| 623 | /* make sure that we sign in the same order that we send on this socket |
| 624 | and avoid races inside tcp sendmsg code that could cause corruption |
| 625 | of smb data */ |
| 626 | |
| 627 | down(&ses->server->tcpSem); |
| 628 | |
| 629 | if (ses->server->tcpStatus == CifsExiting) { |
| 630 | rc = -ENOENT; |
| 631 | goto out_unlock; |
| 632 | } else if (ses->server->tcpStatus == CifsNeedReconnect) { |
| 633 | cFYI(1,("tcp session dead - return to caller to retry")); |
| 634 | rc = -EAGAIN; |
| 635 | goto out_unlock; |
| 636 | } else if (ses->status != CifsGood) { |
| 637 | /* check if SMB session is bad because we are setting it up */ |
| 638 | if((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) && |
| 639 | (in_buf->Command != SMB_COM_NEGOTIATE)) { |
| 640 | rc = -EAGAIN; |
| 641 | goto out_unlock; |
| 642 | } /* else ok - we are setting up session */ |
| 643 | } |
| 644 | midQ = AllocMidQEntry(in_buf, ses); |
| 645 | if (midQ == NULL) { |
| 646 | up(&ses->server->tcpSem); |
| 647 | /* If not lock req, update # of requests on wire to server */ |
| 648 | if(long_op < 3) { |
| 649 | atomic_dec(&ses->server->inFlight); |
| 650 | wake_up(&ses->server->request_q); |
| 651 | } |
| 652 | return -ENOMEM; |
| 653 | } |
| 654 | |
| 655 | if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
| 656 | up(&ses->server->tcpSem); |
| 657 | cERROR(1, |
| 658 | ("Illegal length, greater than maximum frame, %d ", |
| 659 | in_buf->smb_buf_length)); |
| 660 | DeleteMidQEntry(midQ); |
| 661 | /* If not lock req, update # of requests on wire to server */ |
| 662 | if(long_op < 3) { |
| 663 | atomic_dec(&ses->server->inFlight); |
| 664 | wake_up(&ses->server->request_q); |
| 665 | } |
| 666 | return -EIO; |
| 667 | } |
| 668 | |
Steve French | ad009ac | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 669 | rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
| 671 | midQ->midState = MID_REQUEST_SUBMITTED; |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 672 | #ifdef CONFIG_CIFS_STATS2 |
| 673 | atomic_inc(&ses->server->inSend); |
| 674 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length, |
| 676 | (struct sockaddr *) &(ses->server->addr.sockAddr)); |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 677 | #ifdef CONFIG_CIFS_STATS2 |
| 678 | atomic_dec(&ses->server->inSend); |
Steve French | 1047abc | 2005-10-11 19:58:06 -0700 | [diff] [blame] | 679 | midQ->when_sent = jiffies; |
Steve French | 131afd0 | 2005-10-07 09:51:05 -0700 | [diff] [blame] | 680 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | if(rc < 0) { |
| 682 | DeleteMidQEntry(midQ); |
| 683 | up(&ses->server->tcpSem); |
| 684 | /* If not lock req, update # of requests on wire to server */ |
| 685 | if(long_op < 3) { |
| 686 | atomic_dec(&ses->server->inFlight); |
| 687 | wake_up(&ses->server->request_q); |
| 688 | } |
| 689 | return rc; |
| 690 | } else |
| 691 | up(&ses->server->tcpSem); |
| 692 | if (long_op == -1) |
| 693 | goto cifs_no_response_exit; |
Steve French | 275cde1 | 2005-04-28 22:41:10 -0700 | [diff] [blame] | 694 | else if (long_op == 2) /* writes past end of file can take loong time */ |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 695 | timeout = 180 * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | else if (long_op == 1) |
| 697 | timeout = 45 * HZ; /* should be greater than |
| 698 | servers oplock break timeout (about 43 seconds) */ |
| 699 | else if (long_op > 2) { |
| 700 | timeout = MAX_SCHEDULE_TIMEOUT; |
| 701 | } else |
| 702 | timeout = 15 * HZ; |
| 703 | /* wait for 15 seconds or until woken up due to response arriving or |
| 704 | due to last connection to this server being unmounted */ |
| 705 | if (signal_pending(current)) { |
| 706 | /* if signal pending do not hold up user for full smb timeout |
| 707 | but we still give response a change to complete */ |
| 708 | timeout = 2 * HZ; |
| 709 | } |
| 710 | |
| 711 | /* No user interrupts in wait - wreaks havoc with performance */ |
| 712 | if(timeout != MAX_SCHEDULE_TIMEOUT) { |
| 713 | timeout += jiffies; |
| 714 | wait_event(ses->server->response_q, |
| 715 | (!(midQ->midState & MID_REQUEST_SUBMITTED)) || |
| 716 | time_after(jiffies, timeout) || |
| 717 | ((ses->server->tcpStatus != CifsGood) && |
| 718 | (ses->server->tcpStatus != CifsNew))); |
| 719 | } else { |
| 720 | wait_event(ses->server->response_q, |
| 721 | (!(midQ->midState & MID_REQUEST_SUBMITTED)) || |
| 722 | ((ses->server->tcpStatus != CifsGood) && |
| 723 | (ses->server->tcpStatus != CifsNew))); |
| 724 | } |
| 725 | |
| 726 | spin_lock(&GlobalMid_Lock); |
| 727 | if (midQ->resp_buf) { |
| 728 | spin_unlock(&GlobalMid_Lock); |
Steve French | 70ca734 | 2005-09-22 16:32:06 -0700 | [diff] [blame] | 729 | receive_len = midQ->resp_buf->smb_buf_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } else { |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 731 | cERROR(1,("No response for cmd %d mid %d", |
| 732 | midQ->command, midQ->mid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | if(midQ->midState == MID_REQUEST_SUBMITTED) { |
| 734 | if(ses->server->tcpStatus == CifsExiting) |
| 735 | rc = -EHOSTDOWN; |
| 736 | else { |
| 737 | ses->server->tcpStatus = CifsNeedReconnect; |
| 738 | midQ->midState = MID_RETRY_NEEDED; |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | if (rc != -EHOSTDOWN) { |
| 743 | if(midQ->midState == MID_RETRY_NEEDED) { |
| 744 | rc = -EAGAIN; |
| 745 | cFYI(1,("marking request for retry")); |
| 746 | } else { |
| 747 | rc = -EIO; |
| 748 | } |
| 749 | } |
| 750 | spin_unlock(&GlobalMid_Lock); |
| 751 | DeleteMidQEntry(midQ); |
| 752 | /* If not lock req, update # of requests on wire to server */ |
| 753 | if(long_op < 3) { |
| 754 | atomic_dec(&ses->server->inFlight); |
| 755 | wake_up(&ses->server->request_q); |
| 756 | } |
| 757 | return rc; |
| 758 | } |
| 759 | |
| 760 | if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) { |
Steve French | ad009ac | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 761 | cERROR(1, ("Frame too large received. Length: %d Xid: %d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | receive_len, xid)); |
| 763 | rc = -EIO; |
| 764 | } else { /* rcvd frame is ok */ |
| 765 | |
| 766 | if (midQ->resp_buf && out_buf |
| 767 | && (midQ->midState == MID_RESPONSE_RECEIVED)) { |
| 768 | out_buf->smb_buf_length = receive_len; |
| 769 | memcpy((char *)out_buf + 4, |
| 770 | (char *)midQ->resp_buf + 4, |
| 771 | receive_len); |
| 772 | |
| 773 | dump_smb(out_buf, 92); |
| 774 | /* convert the length into a more usable form */ |
| 775 | if((receive_len > 24) && |
Steve French | ad009ac | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 776 | (ses->server->secMode & (SECMODE_SIGN_REQUIRED | |
| 777 | SECMODE_SIGN_ENABLED))) { |
| 778 | rc = cifs_verify_signature(out_buf, |
| 779 | ses->server->mac_signing_key, |
| 780 | midQ->sequence_number+1); |
| 781 | if(rc) { |
Steve French | 275cde1 | 2005-04-28 22:41:10 -0700 | [diff] [blame] | 782 | cERROR(1,("Unexpected SMB signature")); |
| 783 | /* BB FIXME add code to kill session */ |
Steve French | ad009ac | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 784 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | } |
| 786 | |
| 787 | *pbytes_returned = out_buf->smb_buf_length; |
| 788 | |
Steve French | ad009ac | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 789 | /* BB special case reconnect tid and uid here? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | rc = map_smb_to_linux_error(out_buf); |
| 791 | |
| 792 | /* convert ByteCount if necessary */ |
| 793 | if (receive_len >= |
| 794 | sizeof (struct smb_hdr) - |
| 795 | 4 /* do not count RFC1001 header */ + |
| 796 | (2 * out_buf->WordCount) + 2 /* bcc */ ) |
Steve French | 0f2b27c | 2005-11-16 14:25:50 -0800 | [diff] [blame] | 797 | BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } else { |
| 799 | rc = -EIO; |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 800 | cERROR(1,("Bad MID state?")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | } |
| 803 | cifs_no_response_exit: |
| 804 | DeleteMidQEntry(midQ); |
| 805 | |
| 806 | if(long_op < 3) { |
| 807 | atomic_dec(&ses->server->inFlight); |
| 808 | wake_up(&ses->server->request_q); |
| 809 | } |
| 810 | |
| 811 | return rc; |
| 812 | |
| 813 | out_unlock: |
| 814 | up(&ses->server->tcpSem); |
| 815 | /* If not lock req, update # of requests on wire to server */ |
| 816 | if(long_op < 3) { |
| 817 | atomic_dec(&ses->server->inFlight); |
| 818 | wake_up(&ses->server->request_q); |
| 819 | } |
| 820 | |
| 821 | return rc; |
| 822 | } |