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Pavel Shilovsky
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Steve French
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Jul 24, 2012
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: ddfbefbd393fb1a935bdf27cba5ad2eb24a76e75 | ||
| refs/heads/master: 2dc7e1c03316940dec899fa3206a595de000e99b |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,151 @@ | ||
| /* | ||
| * fs/cifs/smb2transport.c | ||
| * | ||
| * Copyright (C) International Business Machines Corp., 2002, 2011 | ||
| * Etersoft, 2012 | ||
| * Author(s): Steve French (sfrench@us.ibm.com) | ||
| * Jeremy Allison (jra@samba.org) 2006 | ||
| * Pavel Shilovsky (pshilovsky@samba.org) 2012 | ||
| * | ||
| * This library is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published | ||
| * by the Free Software Foundation; either version 2.1 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | ||
| * the GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this library; if not, write to the Free Software | ||
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| */ | ||
|
|
||
| #include <linux/fs.h> | ||
| #include <linux/list.h> | ||
| #include <linux/wait.h> | ||
| #include <linux/net.h> | ||
| #include <linux/delay.h> | ||
| #include <linux/uaccess.h> | ||
| #include <asm/processor.h> | ||
| #include <linux/mempool.h> | ||
| #include "smb2pdu.h" | ||
| #include "cifsglob.h" | ||
| #include "cifsproto.h" | ||
| #include "smb2proto.h" | ||
| #include "cifs_debug.h" | ||
| #include "smb2status.h" | ||
|
|
||
| /* | ||
| * Set message id for the request. Should be called after wait_for_free_request | ||
| * and when srv_mutex is held. | ||
| */ | ||
| static inline void | ||
| smb2_seq_num_into_buf(struct TCP_Server_Info *server, struct smb2_hdr *hdr) | ||
| { | ||
| hdr->MessageId = get_next_mid(server); | ||
| } | ||
|
|
||
| static struct mid_q_entry * | ||
| smb2_mid_entry_alloc(const struct smb2_hdr *smb_buffer, | ||
| struct TCP_Server_Info *server) | ||
| { | ||
| struct mid_q_entry *temp; | ||
|
|
||
| if (server == NULL) { | ||
| cERROR(1, "Null TCP session in smb2_mid_entry_alloc"); | ||
| return NULL; | ||
| } | ||
|
|
||
| temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS); | ||
| if (temp == NULL) | ||
| return temp; | ||
| else { | ||
| memset(temp, 0, sizeof(struct mid_q_entry)); | ||
| temp->mid = smb_buffer->MessageId; /* always LE */ | ||
| temp->pid = current->pid; | ||
| temp->command = smb_buffer->Command; /* Always LE */ | ||
| temp->when_alloc = jiffies; | ||
| temp->server = server; | ||
|
|
||
| /* | ||
| * The default is for the mid to be synchronous, so the | ||
| * default callback just wakes up the current task. | ||
| */ | ||
| temp->callback = cifs_wake_up_task; | ||
| temp->callback_data = current; | ||
| } | ||
|
|
||
| atomic_inc(&midCount); | ||
| temp->mid_state = MID_REQUEST_ALLOCATED; | ||
| return temp; | ||
| } | ||
|
|
||
| static int | ||
| smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_hdr *buf, | ||
| struct mid_q_entry **mid) | ||
| { | ||
| if (ses->server->tcpStatus == CifsExiting) | ||
| return -ENOENT; | ||
|
|
||
| if (ses->server->tcpStatus == CifsNeedReconnect) { | ||
| cFYI(1, "tcp session dead - return to caller to retry"); | ||
| return -EAGAIN; | ||
| } | ||
|
|
||
| if (ses->status != CifsGood) { | ||
| /* check if SMB2 session is bad because we are setting it up */ | ||
| if ((buf->Command != SMB2_SESSION_SETUP) && | ||
| (buf->Command != SMB2_NEGOTIATE)) | ||
| return -EAGAIN; | ||
| /* else ok - we are setting up session */ | ||
| } | ||
| *mid = smb2_mid_entry_alloc(buf, ses->server); | ||
| if (*mid == NULL) | ||
| return -ENOMEM; | ||
| spin_lock(&GlobalMid_Lock); | ||
| list_add_tail(&(*mid)->qhead, &ses->server->pending_mid_q); | ||
| spin_unlock(&GlobalMid_Lock); | ||
| return 0; | ||
| } | ||
|
|
||
| int | ||
| smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, | ||
| bool log_error) | ||
| { | ||
| unsigned int len = get_rfc1002_length(mid->resp_buf); | ||
|
|
||
| dump_smb(mid->resp_buf, min_t(u32, 80, len)); | ||
| /* convert the length into a more usable form */ | ||
| /* BB - uncomment with SMB2 signing implementation */ | ||
| /* if ((len > 24) && | ||
| (server->sec_mode & (SECMODE_SIGN_REQUIRED|SECMODE_SIGN_ENABLED))) { | ||
| if (smb2_verify_signature(mid->resp_buf, server)) | ||
| cERROR(1, "Unexpected SMB signature"); | ||
| } */ | ||
|
|
||
| return map_smb2_to_linux_error(mid->resp_buf, log_error); | ||
| } | ||
|
|
||
| int | ||
| smb2_setup_request(struct cifs_ses *ses, struct kvec *iov, | ||
| unsigned int nvec, struct mid_q_entry **ret_mid) | ||
| { | ||
| int rc; | ||
| struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base; | ||
| struct mid_q_entry *mid; | ||
|
|
||
| smb2_seq_num_into_buf(ses->server, hdr); | ||
|
|
||
| rc = smb2_get_mid_entry(ses, hdr, &mid); | ||
| if (rc) | ||
| return rc; | ||
| /* rc = smb2_sign_smb2(iov, nvec, ses->server); | ||
| if (rc) | ||
| delete_mid(mid); */ | ||
| *ret_mid = mid; | ||
| return rc; | ||
| } | ||
|
|
||
| /* BB add missing functions here */ |
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