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Commit e874a5fe authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-next-3.17' of git://git.samba.org/sfrench/cifs-2.6 

Pull cifs/smb3 fixes from Steve French:
 "This includes various cifs and smb3 bug fixes including those for bugs
  found with the recently updated xfstests.

  Also I am working fixes for two additional cifs problems found by
  xfstests which I plan to send later (when reviewed and run additional
  tests)"

* 'for-next-3.17' of git://git.samba.org/sfrench/cifs-2.6:
  Clarify Kconfig help text for CIFS and SMB2/SMB3
  CIFS: Fix wrong filename length for SMB2
  CIFS: Fix wrong restart readdir for SMB1
  CIFS: Fix directory rename error
  cifs: No need to send SIGKILL to demux_thread during umount
  cifs: Allow directIO read/write during cache=strict
  cifs: remove unneeded check of null checking in if condition
  cifs: fix a possible use of uninit variable in SMB2_sess_setup
  cifs: fix memory leak when password is supplied multiple times
  cifs: fix a possible null pointer deref in decode_ascii_ssetup
  Trivial whitespace fix
parents 619df5d2 ca5d13fc

fs/cifs/Kconfig

+23 −12
Original line number Diff line number Diff line
@@ -22,6 +22,11 @@ config CIFS 
	  support for OS/2 and Windows ME and similar servers is provided as

	  well.



	  The module also provides optional support for the followon

	  protocols for CIFS including SMB3, which enables

	  useful performance and security features (see the description

	  of CONFIG_CIFS_SMB2).



	  The cifs module provides an advanced network file system

	  client for mounting to CIFS compliant servers.  It includes

	  support for DFS (hierarchical name space), secure per-user
@@ -121,7 +126,8 @@ config CIFS_ACL 
	  depends on CIFS_XATTR && KEYS

	  help

	    Allows fetching CIFS/NTFS ACL from the server.  The DACL blob

	    is handed over to the application/caller.

	    is handed over to the application/caller.  See the man

	    page for getcifsacl for more information.



config CIFS_DEBUG

	bool "Enable CIFS debugging routines"
@@ -162,7 +168,7 @@ config CIFS_NFSD_EXPORT 
	   Allows NFS server to export a CIFS mounted share (nfsd over cifs)



config CIFS_SMB2

	bool "SMB2 network file system support"

	bool "SMB2 and SMB3 network file system support"

	depends on CIFS && INET

	select NLS

	select KEYS
@@ -170,16 +176,21 @@ config CIFS_SMB2 
	select DNS_RESOLVER



	help

	  This enables experimental support for the SMB2 (Server Message Block

	  version 2) protocol. The SMB2 protocol is the successor to the

	  popular CIFS and SMB network file sharing protocols. SMB2 is the

	  native file sharing mechanism for recent versions of Windows

	  operating systems (since Vista).  SMB2 enablement will eventually

	  allow users better performance, security and features, than would be

	  possible with cifs. Note that smb2 mount options also are simpler

	  (compared to cifs) due to protocol improvements.



	  Unless you are a developer or tester, say N.

	  This enables support for the Server Message Block version 2

	  family of protocols, including SMB3.  SMB3 support is

	  enabled on mount by specifying "vers=3.0" in the mount

	  options. These protocols are the successors to the popular

	  CIFS and SMB network file sharing protocols. SMB3 is the

	  native file sharing mechanism for the more recent

	  versions of Windows (Windows 8 and Windows 2012 and

	  later) and Samba server and many others support SMB3 well.

	  In general SMB3 enables better performance, security

	  and features, than would be possible with CIFS (Note that

	  when mounting to Samba, due to the CIFS POSIX extensions,

	  CIFS mounts can provide slightly better POSIX compatibility

	  than SMB3 mounts do though). Note that SMB2/SMB3 mount

	  options are also slightly simpler (compared to CIFS) due

	  to protocol improvements.



config CIFS_FSCACHE

	  bool "Provide CIFS client caching support"

fs/cifs/cifsglob.h

+0 −5
Original line number Diff line number Diff line
@@ -70,11 +70,6 @@ 
#define SERVER_NAME_LENGTH 40

#define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)



/* used to define string lengths for reversing unicode strings */

/*         (256+1)*2 = 514                                     */

/*           (max path length + 1 for null) * 2 for unicode    */

#define MAX_NAME 514



/* SMB echo "timeout" -- FIXME: tunable? */

#define SMB_ECHO_INTERVAL (60 * HZ)

fs/cifs/connect.c

+2 −19
Original line number Diff line number Diff line
@@ -837,7 +837,6 @@ cifs_demultiplex_thread(void *p) 
	struct TCP_Server_Info *server = p;

	unsigned int pdu_length;

	char *buf = NULL;

	struct task_struct *task_to_wake = NULL;

	struct mid_q_entry *mid_entry;



	current->flags |= PF_MEMALLOC;
@@ -928,19 +927,7 @@ cifs_demultiplex_thread(void *p) 
	if (server->smallbuf) /* no sense logging a debug message if NULL */

		cifs_small_buf_release(server->smallbuf);



	task_to_wake = xchg(&server->tsk, NULL);

	clean_demultiplex_info(server);



	/* if server->tsk was NULL then wait for a signal before exiting */

	if (!task_to_wake) {

		set_current_state(TASK_INTERRUPTIBLE);

		while (!signal_pending(current)) {

			schedule();

			set_current_state(TASK_INTERRUPTIBLE);

		}

		set_current_state(TASK_RUNNING);

	}



	module_put_and_exit(0);

}
@@ -1600,6 +1587,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			tmp_end++;

			if (!(tmp_end < end && tmp_end[1] == delim)) {

				/* No it is not. Set the password to NULL */

				kfree(vol->password);

				vol->password = NULL;

				break;

			}
@@ -1637,6 +1625,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
					options = end;

			}



			kfree(vol->password);

			/* Now build new password string */

			temp_len = strlen(value);

			vol->password = kzalloc(temp_len+1, GFP_KERNEL);
@@ -2061,8 +2050,6 @@ cifs_find_tcp_session(struct smb_vol *vol) 
static void

cifs_put_tcp_session(struct TCP_Server_Info *server)

{

	struct task_struct *task;



	spin_lock(&cifs_tcp_ses_lock);

	if (--server->srv_count > 0) {

		spin_unlock(&cifs_tcp_ses_lock);
@@ -2086,10 +2073,6 @@ cifs_put_tcp_session(struct TCP_Server_Info *server) 
	kfree(server->session_key.response);

	server->session_key.response = NULL;

	server->session_key.len = 0;



	task = xchg(&server->tsk, NULL);

	if (task)

		force_sig(SIGKILL, task);

}



static struct TCP_Server_Info *

fs/cifs/dir.c

+8 −0
Original line number Diff line number Diff line
@@ -497,6 +497,14 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry, 
		goto out;

	}



	if (file->f_flags & O_DIRECT &&

	    CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {

		if (CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)

			file->f_op = &cifs_file_direct_nobrl_ops;

		else

			file->f_op = &cifs_file_direct_ops;

		}



	file_info = cifs_new_fileinfo(&fid, file, tlink, oplock);

	if (file_info == NULL) {

		if (server->ops->close)

fs/cifs/file.c

+8 −0
Original line number Diff line number Diff line
@@ -467,6 +467,14 @@ int cifs_open(struct inode *inode, struct file *file) 
	cifs_dbg(FYI, "inode = 0x%p file flags are 0x%x for %s\n",

		 inode, file->f_flags, full_path);



	if (file->f_flags & O_DIRECT &&

	    cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {

		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)

			file->f_op = &cifs_file_direct_nobrl_ops;

		else

			file->f_op = &cifs_file_direct_ops;

	}



	if (server->oplocks)

		oplock = REQ_OPLOCK;

	else