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:
  cifs: fix dentry hash calculation for case-insensitive mounts
  [CIFS] Don't cache timestamps on utimes due to coarse granularity
  [CIFS] Maximum username length check in session setup does not match
  cifs: fix length calculation for converted unicode readdir names
  [CIFS] Add support for TCP_NODELAY

fs/cifs/CHANGES

@@ -1,3 +1,7 @@
+Version 1.62
+------------
+Add sockopt=TCP_NODELAY mount option.
+
 Version 1.61
 ------------
 Fix append problem to Samba servers (files opened with O_APPEND could

fs/cifs/cifsfs.h

@@ -113,5 +113,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 extern const struct export_operations cifs_export_ops;
 #endif /* EXPERIMENTAL */
 
-#define CIFS_VERSION   "1.61"
+#define CIFS_VERSION   "1.62"
 #endif				/* _CIFSFS_H */

fs/cifs/cifsglob.h

@@ -149,6 +149,7 @@ struct TCP_Server_Info {
 	bool svlocal:1;			/* local server or remote */
 	bool noblocksnd;		/* use blocking sendmsg */
 	bool noautotune;		/* do not autotune send buf sizes */
+	bool tcp_nodelay;
 	atomic_t inFlight;  /* number of requests on the wire to server */
 #ifdef CONFIG_CIFS_STATS2
 	atomic_t inSend; /* requests trying to send */

fs/cifs/connect.c

@@ -98,7 +98,7 @@ struct smb_vol {
 	bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
 	unsigned int rsize;
 	unsigned int wsize;
-	unsigned int sockopt;
+	bool sockopt_tcp_nodelay:1;
 	unsigned short int port;
 	char *prepath;
 };
@@ -1142,9 +1142,11 @@ cifs_parse_mount_options(char *options, const char *devname,
 					simple_strtoul(value, &value, 0);
 			}
 		} else if (strnicmp(data, "sockopt", 5) == 0) {
-			if (value && *value) {
+			if (!value || !*value) {
-				vol->sockopt =
+				cERROR(1, ("no socket option specified"));
-					simple_strtoul(value, &value, 0);
+				continue;
+			} else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
+				vol->sockopt_tcp_nodelay = 1;
 			}
 		} else if (strnicmp(data, "netbiosname", 4) == 0) {
 			if (!value || !*value || (*value == ' ')) {
@@ -1514,6 +1516,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
 
 	tcp_ses->noblocksnd = volume_info->noblocksnd;
 	tcp_ses->noautotune = volume_info->noautotune;
+	tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
 	atomic_set(&tcp_ses->inFlight, 0);
 	init_waitqueue_head(&tcp_ses->response_q);
 	init_waitqueue_head(&tcp_ses->request_q);
@@ -1764,6 +1767,7 @@ static int
 ipv4_connect(struct TCP_Server_Info *server)
 {
 	int rc = 0;
+	int val;
 	bool connected = false;
 	__be16 orig_port = 0;
 	struct socket *socket = server->ssocket;
@@ -1845,6 +1849,14 @@ ipv4_connect(struct TCP_Server_Info *server)
 			socket->sk->sk_rcvbuf = 140 * 1024;
 	}
 
+	if (server->tcp_nodelay) {
+		val = 1;
+		rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
+				(char *)&val, sizeof(val));
+		if (rc)
+			cFYI(1, ("set TCP_NODELAY socket option error %d", rc));
+	}
+
 	 cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
 		 socket->sk->sk_sndbuf,
 		 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo));
@@ -1916,6 +1928,7 @@ static int
 ipv6_connect(struct TCP_Server_Info *server)
 {
 	int rc = 0;
+	int val;
 	bool connected = false;
 	__be16 orig_port = 0;
 	struct socket *socket = server->ssocket;
@@ -1987,6 +2000,15 @@ ipv6_connect(struct TCP_Server_Info *server)
 	 */
 	socket->sk->sk_rcvtimeo = 7 * HZ;
 	socket->sk->sk_sndtimeo = 5 * HZ;
+
+	if (server->tcp_nodelay) {
+		val = 1;
+		rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
+				(char *)&val, sizeof(val));
+		if (rc)
+			cFYI(1, ("set TCP_NODELAY socket option error %d", rc));
+	}
+
 	server->ssocket = socket;
 
 	return rc;

fs/cifs/inode.c

@@ -1762,8 +1762,18 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
 					CIFS_MOUNT_MAP_SPECIAL_CHR);
 	}
 
-	if (!rc)
+	if (!rc) {
 		rc = inode_setattr(inode, attrs);
+
+		/* force revalidate when any of these times are set since some
+		   of the fs types (eg ext3, fat) do not have fine enough
+		   time granularity to match protocol, and we do not have a
+		   a way (yet) to query the server fs's time granularity (and
+		   whether it rounds times down).
+		*/
+		if (!rc && (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)))
+			cifsInode->time = 0;
+	}
 out:
 	kfree(args);
 	kfree(full_path);

fs/cifs/readdir.c

@@ -77,6 +77,11 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
 
 	cFYI(1, ("For %s", name->name));
 
+	if (parent->d_op && parent->d_op->d_hash)
+		parent->d_op->d_hash(parent, name);
+	else
+		name->hash = full_name_hash(name->name, name->len);
+
 	dentry = d_lookup(parent, name);
 	if (dentry) {
 		/* FIXME: check for inode number changes? */
@@ -666,12 +671,11 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst,
 					   min(len, max_len), nlt,
 					   cifs_sb->mnt_cifs_flags &
 						CIFS_MOUNT_MAP_SPECIAL_CHR);
+		pqst->len -= nls_nullsize(nlt);
 	} else {
 		pqst->name = filename;
 		pqst->len = len;
 	}
-	pqst->hash = full_name_hash(pqst->name, pqst->len);
-/*	cFYI(1, ("filldir on %s",pqst->name));  */
 	return rc;
 }
 

fs/cifs/sess.c

@@ -223,9 +223,9 @@ static void unicode_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses,
 		/* null user mount */
 		*bcc_ptr = 0;
 		*(bcc_ptr+1) = 0;
-	} else { /* 300 should be long enough for any conceivable user name */
+	} else {
 		bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName,
-					  300, nls_cp);
+					  MAX_USERNAME_SIZE, nls_cp);
 	}
 	bcc_ptr += 2 * bytes_ret;
 	bcc_ptr += 2; /* account for null termination */
@@ -246,11 +246,10 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses,
 	/* copy user */
 	if (ses->userName == NULL) {
 		/* BB what about null user mounts - check that we do this BB */
-	} else { /* 300 should be long enough for any conceivable user name */
+	} else {
-		strncpy(bcc_ptr, ses->userName, 300);
+		strncpy(bcc_ptr, ses->userName, MAX_USERNAME_SIZE);
 	}
-	/* BB improve check for overflow */
+	bcc_ptr += strnlen(ses->userName, MAX_USERNAME_SIZE);
-	bcc_ptr += strnlen(ses->userName, 300);
 	*bcc_ptr = 0;
 	bcc_ptr++; /* account for null termination */