Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  prevent cifs_writepages() from skipping unwritten pages
  Fixed parsing of mount options when doing DFS submount
  [CIFS] Fix check for tcon seal setting and fix oops on failed mount from earlier patch
  [CIFS] Fix build break
  cifs: reinstate sharing of tree connections
  [CIFS] minor cleanup to cifs_mount
  cifs: reinstate sharing of SMB sessions sans races
  cifs: disable sharing session and tcon and add new TCP sharing code
  [CIFS] clean up server protocol handling
  [CIFS] remove unused list, add new cifs sock list to prepare for mount/umount fix
  [CIFS] Fix cifs reconnection flags
  [CIFS] Can't rely on iov length and base when kernel_recvmsg returns error

9 files changed, 765 insertions, 716 deletions

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 69a12aae91d..490e34bbf27 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -107,12 +107,13 @@ void cifs_dump_mids(struct TCP_Server_Info *server)
 #ifdef CONFIG_PROC_FS
 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 {
-	struct list_head *tmp;
-	struct list_head *tmp1;
+	struct list_head *tmp1, *tmp2, *tmp3;
 	struct mid_q_entry *mid_entry;
+	struct TCP_Server_Info *server;
 	struct cifsSesInfo *ses;
 	struct cifsTconInfo *tcon;
-	int i;
+	int i, j;
+	__u32 dev_type;
 
 	seq_puts(m,
 		    "Display Internal CIFS Data Structures for Debugging\n"
@@ -122,46 +123,78 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 	seq_printf(m, "Servers:");
 
 	i = 0;
-	read_lock(&GlobalSMBSeslock);
-	list_for_each(tmp, &GlobalSMBSessionList) {
+	read_lock(&cifs_tcp_ses_lock);
+	list_for_each(tmp1, &cifs_tcp_ses_list) {
+		server = list_entry(tmp1, struct TCP_Server_Info,
+				    tcp_ses_list);
 		i++;
-		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
-		if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
-		   (ses->serverNOS == NULL)) {
-			seq_printf(m, "\nentry for %s not fully "
-					"displayed\n\t", ses->serverName);
-		} else {
-			seq_printf(m,
-				    "\n%d) Name: %s  Domain: %s Mounts: %d OS:"
-				    " %s  \n\tNOS: %s\tCapability: 0x%x\n\tSMB"
+		list_for_each(tmp2, &server->smb_ses_list) {
+			ses = list_entry(tmp2, struct cifsSesInfo,
+					 smb_ses_list);
+			if ((ses->serverDomain == NULL) ||
+				(ses->serverOS == NULL) ||
+				(ses->serverNOS == NULL)) {
+				seq_printf(m, "\n%d) entry for %s not fully "
+					   "displayed\n\t", i, ses->serverName);
+			} else {
+				seq_printf(m,
+				    "\n%d) Name: %s  Domain: %s Uses: %d OS:"
+				    " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 				    " session status: %d\t",
 				i, ses->serverName, ses->serverDomain,
-				atomic_read(&ses->inUse),
-				ses->serverOS, ses->serverNOS,
+				ses->ses_count, ses->serverOS, ses->serverNOS,
 				ses->capabilities, ses->status);
-		}
-		if (ses->server) {
+			}
 			seq_printf(m, "TCP status: %d\n\tLocal Users To "
-				    "Server: %d SecMode: 0x%x Req On Wire: %d",
-				ses->server->tcpStatus,
-				atomic_read(&ses->server->socketUseCount),
-				ses->server->secMode,
-				atomic_read(&ses->server->inFlight));
+				   "Server: %d SecMode: 0x%x Req On Wire: %d",
+				   server->tcpStatus, server->srv_count,
+				   server->secMode,
+				   atomic_read(&server->inFlight));
 
 #ifdef CONFIG_CIFS_STATS2
 			seq_printf(m, " In Send: %d In MaxReq Wait: %d",
-				atomic_read(&ses->server->inSend),
-				atomic_read(&ses->server->num_waiters));
+				atomic_read(&server->inSend),
+				atomic_read(&server->num_waiters));
 #endif
 
-			seq_puts(m, "\nMIDs:\n");
+			seq_puts(m, "\n\tShares:");
+			j = 0;
+			list_for_each(tmp3, &ses->tcon_list) {
+				tcon = list_entry(tmp3, struct cifsTconInfo,
+						  tcon_list);
+				++j;
+				dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
+				seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
+					   tcon->treeName, tcon->tc_count);
+				if (tcon->nativeFileSystem) {
+					seq_printf(m, "Type: %s ",
+						   tcon->nativeFileSystem);
+				}
+				seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
+					"\nPathComponentMax: %d Status: 0x%d",
+					le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
+					le32_to_cpu(tcon->fsAttrInfo.Attributes),
+					le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
+					tcon->tidStatus);
+				if (dev_type == FILE_DEVICE_DISK)
+					seq_puts(m, " type: DISK ");
+				else if (dev_type == FILE_DEVICE_CD_ROM)
+					seq_puts(m, " type: CDROM ");
+				else
+					seq_printf(m, " type: %d ", dev_type);
+
+				if (tcon->need_reconnect)
+					seq_puts(m, "\tDISCONNECTED ");
+				seq_putc(m, '\n');
+			}
+
+			seq_puts(m, "\n\tMIDs:\n");
 
 			spin_lock(&GlobalMid_Lock);
-			list_for_each(tmp1, &ses->server->pending_mid_q) {
-				mid_entry = list_entry(tmp1, struct
-					mid_q_entry,
+			list_for_each(tmp3, &server->pending_mid_q) {
+				mid_entry = list_entry(tmp3, struct mid_q_entry,
 					qhead);
-				seq_printf(m, "State: %d com: %d pid:"
+				seq_printf(m, "\tState: %d com: %d pid:"
 						" %d tsk: %p mid %d\n",
 						mid_entry->midState,
 						(int)mid_entry->command,
@@ -171,44 +204,8 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 			}
 			spin_unlock(&GlobalMid_Lock);
 		}
-
-	}
-	read_unlock(&GlobalSMBSeslock);
-	seq_putc(m, '\n');
-
-	seq_puts(m, "Shares:");
-
-	i = 0;
-	read_lock(&GlobalSMBSeslock);
-	list_for_each(tmp, &GlobalTreeConnectionList) {
-		__u32 dev_type;
-		i++;
-		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
-		dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
-		seq_printf(m, "\n%d) %s Uses: %d ", i,
-				 tcon->treeName, atomic_read(&tcon->useCount));
-		if (tcon->nativeFileSystem) {
-			seq_printf(m, "Type: %s ",
-					 tcon->nativeFileSystem);
-		}
-		seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
-				 "\nPathComponentMax: %d Status: %d",
-			    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
-			    le32_to_cpu(tcon->fsAttrInfo.Attributes),
-			    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
-			    tcon->tidStatus);
-		if (dev_type == FILE_DEVICE_DISK)
-			seq_puts(m, " type: DISK ");
-		else if (dev_type == FILE_DEVICE_CD_ROM)
-			seq_puts(m, " type: CDROM ");
-		else
-			seq_printf(m, " type: %d ", dev_type);
-
-		if (tcon->tidStatus == CifsNeedReconnect)
-			seq_puts(m, "\tDISCONNECTED ");
 	}
-	read_unlock(&GlobalSMBSeslock);
-
+	read_unlock(&cifs_tcp_ses_lock);
 	seq_putc(m, '\n');
 
 	/* BB add code to dump additional info such as TCP session info now */
@@ -234,7 +231,9 @@ static ssize_t cifs_stats_proc_write(struct file *file,
 {
 	char c;
 	int rc;
-	struct list_head *tmp;
+	struct list_head *tmp1, *tmp2, *tmp3;
+	struct TCP_Server_Info *server;
+	struct cifsSesInfo *ses;
 	struct cifsTconInfo *tcon;
 
 	rc = get_user(c, buffer);
@@ -242,33 +241,42 @@ static ssize_t cifs_stats_proc_write(struct file *file,
 		return rc;
 
 	if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
-		read_lock(&GlobalSMBSeslock);
 #ifdef CONFIG_CIFS_STATS2
 		atomic_set(&totBufAllocCount, 0);
 		atomic_set(&totSmBufAllocCount, 0);
 #endif /* CONFIG_CIFS_STATS2 */
-		list_for_each(tmp, &GlobalTreeConnectionList) {
-			tcon = list_entry(tmp, struct cifsTconInfo,
-					cifsConnectionList);
-			atomic_set(&tcon->num_smbs_sent, 0);
-			atomic_set(&tcon->num_writes, 0);
-			atomic_set(&tcon->num_reads, 0);
-			atomic_set(&tcon->num_oplock_brks, 0);
-			atomic_set(&tcon->num_opens, 0);
-			atomic_set(&tcon->num_closes, 0);
-			atomic_set(&tcon->num_deletes, 0);
-			atomic_set(&tcon->num_mkdirs, 0);
-			atomic_set(&tcon->num_rmdirs, 0);
-			atomic_set(&tcon->num_renames, 0);
-			atomic_set(&tcon->num_t2renames, 0);
-			atomic_set(&tcon->num_ffirst, 0);
-			atomic_set(&tcon->num_fnext, 0);
-			atomic_set(&tcon->num_fclose, 0);
-			atomic_set(&tcon->num_hardlinks, 0);
-			atomic_set(&tcon->num_symlinks, 0);
-			atomic_set(&tcon->num_locks, 0);
+		read_lock(&cifs_tcp_ses_lock);
+		list_for_each(tmp1, &cifs_tcp_ses_list) {
+			server = list_entry(tmp1, struct TCP_Server_Info,
+					    tcp_ses_list);
+			list_for_each(tmp2, &server->smb_ses_list) {
+				ses = list_entry(tmp2, struct cifsSesInfo,
+						 smb_ses_list);
+				list_for_each(tmp3, &ses->tcon_list) {
+					tcon = list_entry(tmp3,
+							  struct cifsTconInfo,
+							  tcon_list);
+					atomic_set(&tcon->num_smbs_sent, 0);
+					atomic_set(&tcon->num_writes, 0);
+					atomic_set(&tcon->num_reads, 0);
+					atomic_set(&tcon->num_oplock_brks, 0);
+					atomic_set(&tcon->num_opens, 0);
+					atomic_set(&tcon->num_closes, 0);
+					atomic_set(&tcon->num_deletes, 0);
+					atomic_set(&tcon->num_mkdirs, 0);
+					atomic_set(&tcon->num_rmdirs, 0);
+					atomic_set(&tcon->num_renames, 0);
+					atomic_set(&tcon->num_t2renames, 0);
+					atomic_set(&tcon->num_ffirst, 0);
+					atomic_set(&tcon->num_fnext, 0);
+					atomic_set(&tcon->num_fclose, 0);
+					atomic_set(&tcon->num_hardlinks, 0);
+					atomic_set(&tcon->num_symlinks, 0);
+					atomic_set(&tcon->num_locks, 0);
+				}
+			}
 		}
-		read_unlock(&GlobalSMBSeslock);
+		read_unlock(&cifs_tcp_ses_lock);
 	}
 
 	return count;
@@ -277,7 +285,9 @@ static ssize_t cifs_stats_proc_write(struct file *file,
 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 {
 	int i;
-	struct list_head *tmp;
+	struct list_head *tmp1, *tmp2, *tmp3;
+	struct TCP_Server_Info *server;
+	struct cifsSesInfo *ses;
 	struct cifsTconInfo *tcon;
 
 	seq_printf(m,
@@ -306,44 +316,55 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
 		GlobalCurrentXid, GlobalMaxActiveXid);
 
 	i = 0;
-	read_lock(&GlobalSMBSeslock);
-	list_for_each(tmp, &GlobalTreeConnectionList) {
-		i++;
-		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
-		seq_printf(m, "\n%d) %s", i, tcon->treeName);
-		if (tcon->tidStatus == CifsNeedReconnect)
-			seq_puts(m, "\tDISCONNECTED ");
-		seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
-			atomic_read(&tcon->num_smbs_sent),
-			atomic_read(&tcon->num_oplock_brks));
-		seq_printf(m, "\nReads:  %d Bytes: %lld",
-			atomic_read(&tcon->num_reads),
-			(long long)(tcon->bytes_read));
-		seq_printf(m, "\nWrites: %d Bytes: %lld",
-			atomic_read(&tcon->num_writes),
-			(long long)(tcon->bytes_written));
-		seq_printf(m,
-			"\nLocks: %d HardLinks: %d Symlinks: %d",
-			atomic_read(&tcon->num_locks),
-			atomic_read(&tcon->num_hardlinks),
-			atomic_read(&tcon->num_symlinks));
-
-		seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
-			atomic_read(&tcon->num_opens),
-			atomic_read(&tcon->num_closes),
-			atomic_read(&tcon->num_deletes));
-		seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
-			atomic_read(&tcon->num_mkdirs),
-			atomic_read(&tcon->num_rmdirs));
-		seq_printf(m, "\nRenames: %d T2 Renames %d",
-			atomic_read(&tcon->num_renames),
-			atomic_read(&tcon->num_t2renames));
-		seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
-			atomic_read(&tcon->num_ffirst),
-			atomic_read(&tcon->num_fnext),
-			atomic_read(&tcon->num_fclose));
+	read_lock(&cifs_tcp_ses_lock);
+	list_for_each(tmp1, &cifs_tcp_ses_list) {
+		server = list_entry(tmp1, struct TCP_Server_Info,
+				    tcp_ses_list);
+		list_for_each(tmp2, &server->smb_ses_list) {
+			ses = list_entry(tmp2, struct cifsSesInfo,
+					 smb_ses_list);
+			list_for_each(tmp3, &ses->tcon_list) {
+				tcon = list_entry(tmp3,
+						  struct cifsTconInfo,
+						  tcon_list);
+				i++;
+				seq_printf(m, "\n%d) %s", i, tcon->treeName);
+				if (tcon->need_reconnect)
+					seq_puts(m, "\tDISCONNECTED ");
+				seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
+					atomic_read(&tcon->num_smbs_sent),
+					atomic_read(&tcon->num_oplock_brks));
+				seq_printf(m, "\nReads:  %d Bytes: %lld",
+					atomic_read(&tcon->num_reads),
+					(long long)(tcon->bytes_read));
+				seq_printf(m, "\nWrites: %d Bytes: %lld",
+					atomic_read(&tcon->num_writes),
+					(long long)(tcon->bytes_written));
+				seq_printf(m, "\nLocks: %d HardLinks: %d "
+					      "Symlinks: %d",
+					atomic_read(&tcon->num_locks),
+					atomic_read(&tcon->num_hardlinks),
+					atomic_read(&tcon->num_symlinks));
+				seq_printf(m, "\nOpens: %d Closes: %d"
+					      "Deletes: %d",
+					atomic_read(&tcon->num_opens),
+					atomic_read(&tcon->num_closes),
+					atomic_read(&tcon->num_deletes));
+				seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
+					atomic_read(&tcon->num_mkdirs),
+					atomic_read(&tcon->num_rmdirs));
+				seq_printf(m, "\nRenames: %d T2 Renames %d",
+					atomic_read(&tcon->num_renames),
+					atomic_read(&tcon->num_t2renames));
+				seq_printf(m, "\nFindFirst: %d FNext %d "
+					      "FClose %d",
+					atomic_read(&tcon->num_ffirst),
+					atomic_read(&tcon->num_fnext),
+					atomic_read(&tcon->num_fclose));
+			}
+		}
 	}
-	read_unlock(&GlobalSMBSeslock);
+	read_unlock(&cifs_tcp_ses_lock);
 
 	seq_putc(m, '\n');
 	return 0;
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index d2c8eef84f3..e1c18362ba4 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -106,7 +106,8 @@ static char *cifs_get_share_name(const char *node_name)
 /**
  * compose_mount_options	-	creates mount options for refferral
  * @sb_mountdata:	parent/root DFS mount options (template)
- * @ref_unc:		refferral server UNC
+ * @dentry:		point where we are going to mount
+ * @ref:		server's referral
  * @devname:		pointer for saving device name
  *
  * creates mount options for submount based on template options sb_mountdata
@@ -116,7 +117,8 @@ static char *cifs_get_share_name(const char *node_name)
  * Caller is responcible for freeing retunrned value if it is not error.
  */
 static char *compose_mount_options(const char *sb_mountdata,
-				   const char *ref_unc,
+				   struct dentry *dentry,
+				   const struct dfs_info3_param *ref,
 				   char **devname)
 {
 	int rc;
@@ -126,11 +128,12 @@ static char *compose_mount_options(const char *sb_mountdata,
 	char *srvIP = NULL;
 	char sep = ',';
 	int off, noff;
+	char *fullpath;
 
 	if (sb_mountdata == NULL)
 		return ERR_PTR(-EINVAL);
 
-	*devname = cifs_get_share_name(ref_unc);
+	*devname = cifs_get_share_name(ref->node_name);
 	rc = dns_resolve_server_name_to_ip(*devname, &srvIP);
 	if (rc != 0) {
 		cERROR(1, ("%s: Failed to resolve server part of %s to IP",
@@ -138,7 +141,12 @@ static char *compose_mount_options(const char *sb_mountdata,
 		mountdata = ERR_PTR(rc);
 		goto compose_mount_options_out;
 	}
-	md_len = strlen(sb_mountdata) + strlen(srvIP) + strlen(ref_unc) + 3;
+	/* md_len = strlen(...) + 12 for 'sep+prefixpath='
+	 * assuming that we have 'unc=' and 'ip=' in
+	 * the original sb_mountdata
+	 */
+	md_len = strlen(sb_mountdata) + strlen(srvIP) +
+		strlen(ref->node_name) + 12;
 	mountdata = kzalloc(md_len+1, GFP_KERNEL);
 	if (mountdata == NULL) {
 		mountdata = ERR_PTR(-ENOMEM);
@@ -152,41 +160,56 @@ static char *compose_mount_options(const char *sb_mountdata,
 			strncpy(mountdata, sb_mountdata, 5);
 			off += 5;
 	}
-	while ((tkn_e = strchr(sb_mountdata+off, sep))) {
-		noff = (tkn_e - (sb_mountdata+off)) + 1;
-		if (strnicmp(sb_mountdata+off, "unc=", 4) == 0) {
+
+	do {
+		tkn_e = strchr(sb_mountdata + off, sep);
+		if (tkn_e == NULL)
+			noff = strlen(sb_mountdata + off);
+		else
+			noff = tkn_e - (sb_mountdata + off) + 1;
+
+		if (strnicmp(sb_mountdata + off, "unc=", 4) == 0) {
 			off += noff;
 			continue;
 		}
-		if (strnicmp(sb_mountdata+off, "ip=", 3) == 0) {
+		if (strnicmp(sb_mountdata + off, "ip=", 3) == 0) {
 			off += noff;
 			continue;
 		}
-		if (strnicmp(sb_mountdata+off, "prefixpath=", 3) == 0) {
+		if (strnicmp(sb_mountdata + off, "prefixpath=", 11) == 0) {
 			off += noff;
 			continue;
 		}
-		strncat(mountdata, sb_mountdata+off, noff);
+		strncat(mountdata, sb_mountdata + off, noff);
 		off += noff;
-	}
-	strcat(mountdata, sb_mountdata+off);
+	} while (tkn_e);
+	strcat(mountdata, sb_mountdata + off);
 	mountdata[md_len] = '\0';
 
 	/* copy new IP and ref share name */
-	strcat(mountdata, ",ip=");
+	if (mountdata[strlen(mountdata) - 1] != sep)
+		strncat(mountdata, &sep, 1);
+	strcat(mountdata, "ip=");
 	strcat(mountdata, srvIP);
-	strcat(mountdata, ",unc=");
+	strncat(mountdata, &sep, 1);
+	strcat(mountdata, "unc=");
 	strcat(mountdata, *devname);
 
 	/* find & copy prefixpath */
-	tkn_e = strchr(ref_unc+2, '\\');
-	if (tkn_e) {
-		tkn_e = strchr(tkn_e+1, '\\');
-		if (tkn_e) {
-			strcat(mountdata, ",prefixpath=");
-			strcat(mountdata, tkn_e+1);
-		}
+	tkn_e = strchr(ref->node_name + 2, '\\');
+	if (tkn_e == NULL) /* invalid unc, missing share name*/
+		goto compose_mount_options_out;
+
+	fullpath = build_path_from_dentry(dentry);
+	tkn_e = strchr(tkn_e + 1, '\\');
+	if (tkn_e || strlen(fullpath) - (ref->path_consumed)) {
+		strncat(mountdata, &sep, 1);
+		strcat(mountdata, "prefixpath=");
+		if (tkn_e)
+			strcat(mountdata, tkn_e + 1);
+		strcat(mountdata, fullpath + (ref->path_consumed));
 	}
+	kfree(fullpath);
 
 	/*cFYI(1,("%s: parent mountdata: %s", __func__,sb_mountdata));*/
 	/*cFYI(1, ("%s: submount mountdata: %s", __func__, mountdata ));*/
@@ -198,7 +221,7 @@ compose_mount_options_out:
 
 
 static struct vfsmount *cifs_dfs_do_refmount(const struct vfsmount *mnt_parent,
-		struct dentry *dentry, char *ref_unc)
+		struct dentry *dentry, const struct dfs_info3_param *ref)
 {
 	struct cifs_sb_info *cifs_sb;
 	struct vfsmount *mnt;
@@ -207,7 +230,7 @@ static struct vfsmount *cifs_dfs_do_refmount(const struct vfsmount *mnt_parent,
 
 	cifs_sb = CIFS_SB(dentry->d_inode->i_sb);
 	mountdata = compose_mount_options(cifs_sb->mountdata,
-						ref_unc, &devname);
+						dentry, ref, &devname);
 
 	if (IS_ERR(mountdata))
 		return (struct vfsmount *)mountdata;
@@ -310,7 +333,7 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
 			}
 			mnt = cifs_dfs_do_refmount(nd->path.mnt,
 						nd->path.dentry,
-						referrals[i].node_name);
+						referrals + i);
 			cFYI(1, ("%s: cifs_dfs_do_refmount:%s , mnt:%p",
 					 __func__,
 					referrals[i].node_name, mnt));
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c
index fcee9298b62..0ab2fb5afef 100644
--- a/fs/cifs/cifs_spnego.c
+++ b/fs/cifs/cifs_spnego.c
@@ -73,8 +73,8 @@ struct key_type cifs_spnego_key_type = {
  * strlen(";sec=ntlmsspi") */
 #define MAX_MECH_STR_LEN	13
 
-/* max possible addr len eg FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/60 */
-#define MAX_IPV6_ADDR_LEN	42
+/* max possible addr len eg FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/128 */
+#define MAX_IPV6_ADDR_LEN	43
 
 /* strlen of "host=" */
 #define HOST_KEY_LEN		5
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index ac5915d61dc..d9cf467309e 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -514,10 +514,11 @@ static void cifs_umount_begin(struct super_block *sb)
 	tcon = cifs_sb->tcon;
 	if (tcon == NULL)
 		return;
-	down(&tcon->tconSem);
-	if (atomic_read(&tcon->useCount) == 1)
+
+	read_lock(&cifs_tcp_ses_lock);
+	if (tcon->tc_count == 1)
 		tcon->tidStatus = CifsExiting;
-	up(&tcon->tconSem);
+	read_unlock(&cifs_tcp_ses_lock);
 
 	/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
 	/* cancel_notify_requests(tcon); */
@@ -1013,7 +1014,7 @@ static int cifs_oplock_thread(void *dummyarg)
 				not bother sending an oplock release if session
 				to server still is disconnected since oplock
 				already released by the server in that case */
-			if (pTcon->tidStatus != CifsNeedReconnect) {
+			if (!pTcon->need_reconnect) {
 				rc = CIFSSMBLock(0, pTcon, netfid,
 						0 /* len */ , 0 /* offset */, 0,
 						0, LOCKING_ANDX_OPLOCK_RELEASE,
@@ -1031,24 +1032,24 @@ static int cifs_oplock_thread(void *dummyarg)
 static int cifs_dnotify_thread(void *dummyarg)
 {
 	struct list_head *tmp;
-	struct cifsSesInfo *ses;
+	struct TCP_Server_Info *server;
 
 	do {
 		if (try_to_freeze())
 			continue;
 		set_current_state(TASK_INTERRUPTIBLE);
 		schedule_timeout(15*HZ);
-		read_lock(&GlobalSMBSeslock);
 		/* check if any stuck requests that need
 		   to be woken up and wakeq so the
 		   thread can wake up and error out */
-		list_for_each(tmp, &GlobalSMBSessionList) {
-			ses = list_entry(tmp, struct cifsSesInfo,
-				cifsSessionList);
-			if (ses->server && atomic_read(&ses->server->inFlight))
-				wake_up_all(&ses->server->response_q);
+		read_lock(&cifs_tcp_ses_lock);
+		list_for_each(tmp, &cifs_tcp_ses_list) {
+			server = list_entry(tmp, struct TCP_Server_Info,
+					 tcp_ses_list);
+			if (atomic_read(&server->inFlight))
+				wake_up_all(&server->response_q);
 		}
-		read_unlock(&GlobalSMBSeslock);
+		read_unlock(&cifs_tcp_ses_lock);
 	} while (!kthread_should_stop());
 
 	return 0;
@@ -1059,9 +1060,7 @@ init_cifs(void)
 {
 	int rc = 0;
 	cifs_proc_init();
-/*	INIT_LIST_HEAD(&GlobalServerList);*/	/* BB not implemented yet */
-	INIT_LIST_HEAD(&GlobalSMBSessionList);
-	INIT_LIST_HEAD(&GlobalTreeConnectionList);
+	INIT_LIST_HEAD(&cifs_tcp_ses_list);
 	INIT_LIST_HEAD(&GlobalOplock_Q);
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	INIT_LIST_HEAD(&GlobalDnotifyReqList);
@@ -1089,6 +1088,7 @@ init_cifs(void)
 	GlobalMaxActiveXid = 0;
 	memset(Local_System_Name, 0, 15);
 	rwlock_init(&GlobalSMBSeslock);
+	rwlock_init(&cifs_tcp_ses_lock);
 	spin_lock_init(&GlobalMid_Lock);
 
 	if (cifs_max_pending < 2) {
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 1cb1189f24e..f1ae1f57c30 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -85,8 +85,7 @@ enum securityEnum {
 };
 
 enum protocolEnum {
-	IPV4 = 0,
-	IPV6,
+	TCP = 0,
 	SCTP
 	/* Netbios frames protocol not supported at this time */
 };
@@ -122,6 +121,9 @@ struct cifs_cred {
  */
 
 struct TCP_Server_Info {
+	struct list_head tcp_ses_list;
+	struct list_head smb_ses_list;
+	int srv_count; /* reference counter */
 	/* 15 character server name + 0x20 16th byte indicating type = srv */
 	char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
 	char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2];
@@ -143,7 +145,6 @@ struct TCP_Server_Info {
 	bool svlocal:1;			/* local server or remote */
 	bool noblocksnd;		/* use blocking sendmsg */
 	bool noautotune;		/* do not autotune send buf sizes */
-	atomic_t socketUseCount; /* number of open cifs sessions on socket */
 	atomic_t inFlight;  /* number of requests on the wire to server */
 #ifdef CONFIG_CIFS_STATS2
 	atomic_t inSend; /* requests trying to send */
@@ -194,13 +195,14 @@ struct cifsUidInfo {
  * Session structure.  One of these for each uid session with a particular host
  */
 struct cifsSesInfo {
-	struct list_head cifsSessionList;
+	struct list_head smb_ses_list;
+	struct list_head tcon_list;
 	struct semaphore sesSem;
 #if 0
 	struct cifsUidInfo *uidInfo;	/* pointer to user info */
 #endif
 	struct TCP_Server_Info *server;	/* pointer to server info */
-	atomic_t inUse; /* # of mounts (tree connections) on this ses */
+	int ses_count;		/* reference counter */
 	enum statusEnum status;
 	unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 	__u16 ipc_tid;		/* special tid for connection to IPC share */
@@ -216,6 +218,7 @@ struct cifsSesInfo {
 	char userName[MAX_USERNAME_SIZE + 1];
 	char *domainName;
 	char *password;
+	bool need_reconnect:1; /* connection reset, uid now invalid */
 };
 /* no more than one of the following three session flags may be set */
 #define CIFS_SES_NT4 1
@@ -230,16 +233,15 @@ struct cifsSesInfo {
  * session
  */
 struct cifsTconInfo {
-	struct list_head cifsConnectionList;
+	struct list_head tcon_list;
+	int tc_count;
 	struct list_head openFileList;
-	struct semaphore tconSem;
 	struct cifsSesInfo *ses;	/* pointer to session associated with */
 	char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 	char *nativeFileSystem;
 	__u16 tid;		/* The 2 byte tree id */
 	__u16 Flags;		/* optional support bits */
 	enum statusEnum tidStatus;
-	atomic_t useCount;	/* how many explicit/implicit mounts to share */
 #ifdef CONFIG_CIFS_STATS
 	atomic_t num_smbs_sent;
 	atomic_t num_writes;
@@ -288,6 +290,7 @@ struct cifsTconInfo {
 	bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 				for this mount even if server would support */
 	bool local_lease:1; /* check leases (only) on local system not remote */
+	bool need_reconnect:1; /* connection reset, tid now invalid */
 	/* BB add field for back pointer to sb struct(s)? */
 };
 
@@ -588,21 +591,21 @@ require use of the stronger protocol */
 #endif
 
 /*
- * The list of servers that did not respond with NT LM 0.12.
- * This list helps improve performance and eliminate the messages indicating
- * that we had a communications error talking to the server in this list.
+ * the list of TCP_Server_Info structures, ie each of the sockets
+ * connecting our client to a distinct server (ip address), is
+ * chained together by cifs_tcp_ses_list. The list of all our SMB
+ * sessions (and from that the tree connections) can be found
+ * by iterating over cifs_tcp_ses_list
  */
-/* Feature not supported */
-/* GLOBAL_EXTERN struct servers_not_supported *NotSuppList; */
+GLOBAL_EXTERN struct list_head		cifs_tcp_ses_list;
 
 /*
- * The following is a hash table of all the users we know about.
+ * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
+ * tcp session, and the list of tcon's per smb session. It also protects
+ * the reference counters for the server, smb session, and tcon. Finally,
+ * changes to the tcon->tidStatus should be done while holding this lock.
  */
-GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH];
-
-/* GLOBAL_EXTERN struct list_head GlobalServerList; BB not implemented yet */
-GLOBAL_EXTERN struct list_head GlobalSMBSessionList;
-GLOBAL_EXTERN struct list_head GlobalTreeConnectionList;
+GLOBAL_EXTERN rwlock_t		cifs_tcp_ses_lock;
 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;  /* protects list inserts on 3 above */
 
 GLOBAL_EXTERN struct list_head GlobalOplock_Q;
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index d5eac48fc41..bdda46dd435 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -190,10 +190,10 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
 		/* need to prevent multiple threads trying to
 		simultaneously reconnect the same SMB session */
 			down(&tcon->ses->sesSem);
-			if (tcon->ses->status == CifsNeedReconnect)
+			if (tcon->ses->need_reconnect)
 				rc = cifs_setup_session(0, tcon->ses,
 							nls_codepage);
-			if (!rc && (tcon->tidStatus == CifsNeedReconnect)) {
+			if (!rc && (tcon->need_reconnect)) {
 				mark_open_files_invalid(tcon);
 				rc = CIFSTCon(0, tcon->ses, tcon->treeName,
 					      tcon, nls_codepage);
@@ -295,7 +295,7 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
 	   check for tcp and smb session status done differently
 	   for those three - in the calling routine */
 	if (tcon) {
-		if (tcon->tidStatus == CifsExiting) {
+		if (tcon->need_reconnect) {
 			/* only tree disconnect, open, and write,
 			  (and ulogoff which does not have tcon)
 			  are allowed as we start force umount */
@@ -337,10 +337,10 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
 		/* need to prevent multiple threads trying to
 		simultaneously reconnect the same SMB session */
 			down(&tcon->ses->sesSem);
-			if (tcon->ses->status == CifsNeedReconnect)
+			if (tcon->ses->need_reconnect)
 				rc = cifs_setup_session(0, tcon->ses,
 							nls_codepage);
-			if (!rc && (tcon->tidStatus == CifsNeedReconnect)) {
+			if (!rc && (tcon->need_reconnect)) {
 				mark_open_files_invalid(tcon);
 				rc = CIFSTCon(0, tcon->ses, tcon->treeName,
 					      tcon, nls_codepage);
@@ -664,8 +664,9 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
 			rc = -EIO;
 			goto neg_err_exit;
 		}
-
-		if (server->socketUseCount.counter > 1) {
+		read_lock(&cifs_tcp_ses_lock);
+		if (server->srv_count > 1) {
+			read_unlock(&cifs_tcp_ses_lock);
 			if (memcmp(server->server_GUID,
 				   pSMBr->u.extended_response.
 				   GUID, 16) != 0) {
@@ -674,9 +675,11 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
 					pSMBr->u.extended_response.GUID,
 					16);
 			}
-		} else
+		} else {
+			read_unlock(&cifs_tcp_ses_lock);
 			memcpy(server->server_GUID,
 			       pSMBr->u.extended_response.GUID, 16);
+		}
 
 		if (count == 16) {
 			server->secType = RawNTLMSSP;
@@ -739,50 +742,31 @@ CIFSSMBTDis(const int xid, struct cifsTconInfo *tcon)
 	int rc = 0;
 
 	cFYI(1, ("In tree disconnect"));
-	/*
-	 *  If last user of the connection and
-	 *  connection alive - disconnect it
-	 *  If this is the last connection on the server session disconnect it
-	 *  (and inside session disconnect we should check if tcp socket needs
-	 *  to be freed and kernel thread woken up).
-	 */
-	if (tcon)
-		down(&tcon->tconSem);
-	else
-		return -EIO;
 
-	atomic_dec(&tcon->useCount);
-	if (atomic_read(&tcon->useCount) > 0) {
-		up(&tcon->tconSem);
-		return -EBUSY;
-	}
+	/* BB: do we need to check this? These should never be NULL. */
+	if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
+		return -EIO;
 
-	/* No need to return error on this operation if tid invalidated and
-	closed on server already e.g. due to tcp session crashing */
-	if (tcon->tidStatus == CifsNeedReconnect) {
-		up(&tcon->tconSem);
+	/*
+	 * No need to return error on this operation if tid invalidated and
+	 * closed on server already e.g. due to tcp session crashing. Also,
+	 * the tcon is no longer on the list, so no need to take lock before
+	 * checking this.
+	 */
+	if (tcon->need_reconnect)
 		return 0;
-	}
 
-	if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) {
-		up(&tcon->tconSem);
-		return -EIO;
-	}
 	rc = small_smb_init(SMB_COM_TREE_DISCONNECT, 0, tcon,
 			    (void **)&smb_buffer);
-	if (rc) {
-		up(&tcon->tconSem);
+	if (rc)
 		return rc;
-	}
 
 	rc = SendReceiveNoRsp(xid, tcon->ses, smb_buffer, 0);
 	if (rc)
 		cFYI(1, ("Tree disconnect failed %d", rc));
 
-	up(&tcon->tconSem);
-
 	/* No need to return error on this operation if tid invalidated and
-	closed on server already e.g. due to tcp session crashing */
+	   closed on server already e.g. due to tcp session crashing */
 	if (rc == -EAGAIN)
 		rc = 0;
 
@@ -796,43 +780,36 @@ CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
 	int rc = 0;
 
 	cFYI(1, ("In SMBLogoff for session disconnect"));
-	if (ses)
-		down(&ses->sesSem);
-	else
+
+	/*
+	 * BB: do we need to check validity of ses and server? They should
+	 * always be valid since we have an active reference. If not, that
+	 * should probably be a BUG()
+	 */
+	if (!ses || !ses->server)
 		return -EIO;
 
-	atomic_dec(&ses->inUse);
-	if (atomic_read(&ses->inUse) > 0) {
-		up(&ses->sesSem);
-		return -EBUSY;
-	}
+	down(&ses->sesSem);
+	if (ses->need_reconnect)
+		goto session_already_dead; /* no need to send SMBlogoff if uid
+					      already closed due to reconnect */
 	rc = small_smb_init(SMB_COM_LOGOFF_ANDX, 2, NULL, (void **)&pSMB);
 	if (rc) {
 		up(&ses->sesSem);
 		return rc;
 	}
 
-	if (ses->server) {
-		pSMB->hdr.Mid = GetNextMid(ses->server);
+	pSMB->hdr.Mid = GetNextMid(ses->server);
 
-		if (ses->server->secMode &
+	if (ses->server->secMode &
 		   (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
 			pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
-	}
 
 	pSMB->hdr.Uid = ses->Suid;
 
 	pSMB->AndXCommand = 0xFF;
 	rc = SendReceiveNoRsp(xid, ses, (struct smb_hdr *) pSMB, 0);
-	if (ses->server) {
-		atomic_dec(&ses->server->socketUseCount);
-		if (atomic_read(&ses->server->socketUseCount) == 0) {
-			spin_lock(&GlobalMid_Lock);
-			ses->server->tcpStatus = CifsExiting;
-			spin_unlock(&GlobalMid_Lock);
-			rc = -ESHUTDOWN;
-		}
-	}
+session_already_dead:
 	up(&ses->sesSem);
 
 	/* if session dead then we do not need to do ulogoff,
@@ -3922,6 +3899,27 @@ GetInodeNumOut:
 	return rc;
 }
 
+/* computes length of UCS string converted to host codepage
+ * @src:	UCS string
+ * @maxlen:	length of the input string in UCS characters
+ * 		(not in bytes)
+ *
+ * return:	size of input string in host codepage
+ */
+static int hostlen_fromUCS(const __le16 *src, const int maxlen,
+		const struct nls_table *nls_codepage) {
+	int i;
+	int hostlen = 0;
+	char to[4];
+	int charlen;
+	for (i = 0; (i < maxlen) && src[i]; ++i) {
+		charlen = nls_codepage->uni2char(le16_to_cpu(src[i]),
+				to, NLS_MAX_CHARSET_SIZE);
+		hostlen += charlen > 0 ? charlen : 1;
+	}
+	return hostlen;
+}
+
 /* parses DFS refferal V3 structure
  * caller is responsible for freeing target_nodes
  * returns:
@@ -3932,7 +3930,8 @@ static int
 parse_DFS_referrals(TRANSACTION2_GET_DFS_REFER_RSP *pSMBr,
 		unsigned int *num_of_nodes,
 		struct dfs_info3_param **target_nodes,
-		const struct nls_table *nls_codepage)
+		const struct nls_table *nls_codepage, int remap,
+		const char *searchName)
 {