Patchwork [01/11] cifs: add function to get a tcon from cifs_sb

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Submitter Jeff Layton
Date April 20, 2010, 8:07 p.m.
Message ID <1271794039-22787-2-git-send-email-jlayton@redhat.com>
Download mbox | patch
Permalink /patch/50563/
State New
Headers show

Comments

Jeff Layton - April 20, 2010, 8:07 p.m.
When we convert cifs to do multiple sessions per mount, we'll need more
than one tcon per superblock. At that point "cifs_sb->tcon" will make
no sense. Add a new accessor function that gets a tcon given a cifs_sb.
For now, it just returns cifs_sb->tcon. Later it'll do more.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 fs/cifs/cifs_dfs_ref.c |    2 +-
 fs/cifs/cifsacl.c      |   16 +++++++-------
 fs/cifs/cifsfs.c       |   20 ++++++++--------
 fs/cifs/cifsglob.h     |    6 +++++
 fs/cifs/connect.c      |    4 +-
 fs/cifs/dir.c          |   18 ++++++++--------
 fs/cifs/file.c         |   34 +++++++++++++++---------------
 fs/cifs/inode.c        |   54 ++++++++++++++++++++++++------------------------
 fs/cifs/ioctl.c        |    2 +-
 fs/cifs/link.c         |    6 ++--
 fs/cifs/misc.c         |    2 +-
 fs/cifs/readdir.c      |   10 ++++----
 fs/cifs/xattr.c        |    8 +++---
 13 files changed, 94 insertions(+), 88 deletions(-)

Patch

diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index 78e4d2a..fc7035a 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -323,7 +323,7 @@  cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
 	nd->path.dentry = dget(dentry);
 
 	cifs_sb = CIFS_SB(dentry->d_inode->i_sb);
-	ses = cifs_sb->tcon->ses;
+	ses = cifs_sb_tcon(cifs_sb)->ses;
 
 	if (!ses) {
 		rc = -EINVAL;
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 9b716d0..b8dd664 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -559,7 +559,7 @@  static struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
 	int xid, rc;
 
 	xid = GetXid();
-	rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, &pntsd, pacllen);
+	rc = CIFSSMBGetCIFSACL(xid, cifs_sb_tcon(cifs_sb), fid, &pntsd, pacllen);
 	FreeXid(xid);
 
 
@@ -577,7 +577,7 @@  static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
 
 	xid = GetXid();
 
-	rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN, READ_CONTROL, 0,
+	rc = CIFSSMBOpen(xid, cifs_sb_tcon(cifs_sb), path, FILE_OPEN, READ_CONTROL, 0,
 			 &fid, &oplock, NULL, cifs_sb->local_nls,
 			 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 	if (rc) {
@@ -585,10 +585,10 @@  static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
 		goto out;
 	}
 
-	rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, &pntsd, pacllen);
+	rc = CIFSSMBGetCIFSACL(xid, cifs_sb_tcon(cifs_sb), fid, &pntsd, pacllen);
 	cFYI(1, ("GetCIFSACL rc = %d ACL len %d", rc, *pacllen));
 
-	CIFSSMBClose(xid, cifs_sb->tcon, fid);
+	CIFSSMBClose(xid, cifs_sb_tcon(cifs_sb), fid);
  out:
 	FreeXid(xid);
 	return pntsd;
@@ -618,7 +618,7 @@  static int set_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, __u16 fid,
 	int xid, rc;
 
 	xid = GetXid();
-	rc = CIFSSMBSetCIFSACL(xid, cifs_sb->tcon, fid, pnntsd, acllen);
+	rc = CIFSSMBSetCIFSACL(xid, cifs_sb_tcon(cifs_sb), fid, pnntsd, acllen);
 	FreeXid(xid);
 
 	cFYI(DBG2, ("SetCIFSACL rc = %d", rc));
@@ -634,7 +634,7 @@  static int set_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path,
 
 	xid = GetXid();
 
-	rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN, WRITE_DAC, 0,
+	rc = CIFSSMBOpen(xid, cifs_sb_tcon(cifs_sb), path, FILE_OPEN, WRITE_DAC, 0,
 			 &fid, &oplock, NULL, cifs_sb->local_nls,
 			 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 	if (rc) {
@@ -642,10 +642,10 @@  static int set_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path,
 		goto out;
 	}
 
-	rc = CIFSSMBSetCIFSACL(xid, cifs_sb->tcon, fid, pnntsd, acllen);
+	rc = CIFSSMBSetCIFSACL(xid, cifs_sb_tcon(cifs_sb), fid, pnntsd, acllen);
 	cFYI(DBG2, ("SetCIFSACL rc = %d", rc));
 
-	CIFSSMBClose(xid, cifs_sb->tcon, fid);
+	CIFSSMBClose(xid, cifs_sb_tcon(cifs_sb), fid);
  out:
 	FreeXid(xid);
 	return rc;
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 09e9783..211dcbf 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -135,9 +135,9 @@  cifs_read_super(struct super_block *sb, void *data,
 
 	sb->s_magic = CIFS_MAGIC_NUMBER;
 	sb->s_op = &cifs_super_ops;
-/*	if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
+/*	if (cifs_sb_tcon(cifs_sb)->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
 	    sb->s_blocksize =
-		cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
+		cifs_sb_tcon(cifs_sb)->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
 #ifdef CONFIG_CIFS_QUOTA
 	sb->s_qcop = &cifs_quotactl_ops;
 #endif
@@ -224,7 +224,7 @@  cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct super_block *sb = dentry->d_sb;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
-	struct cifsTconInfo *tcon = cifs_sb->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb);
 	int rc = -EOPNOTSUPP;
 	int xid;
 
@@ -359,7 +359,7 @@  static int
 cifs_show_options(struct seq_file *s, struct vfsmount *m)
 {
 	struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
-	struct cifsTconInfo *tcon = cifs_sb->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb);
 
 	seq_printf(s, ",unc=%s", tcon->treeName);
 	if (tcon->ses->userName)
@@ -432,7 +432,7 @@  int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid,
 	struct cifsTconInfo *pTcon;
 
 	if (cifs_sb)
-		pTcon = cifs_sb->tcon;
+		pTcon = cifs_sb_tcon(cifs_sb);
 	else
 		return -EIO;
 
@@ -456,7 +456,7 @@  int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid,
 	struct cifsTconInfo *pTcon;
 
 	if (cifs_sb)
-		pTcon = cifs_sb->tcon;
+		pTcon = cifs_sb_tcon(cifs_sb);
 	else
 		return -EIO;
 
@@ -478,7 +478,7 @@  int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation)
 	struct cifsTconInfo *pTcon;
 
 	if (cifs_sb)
-		pTcon = cifs_sb->tcon;
+		pTcon = cifs_sb_tcon(cifs_sb);
 	else
 		return -EIO;
 
@@ -500,7 +500,7 @@  int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats)
 	struct cifsTconInfo *pTcon;
 
 	if (cifs_sb)
-		pTcon = cifs_sb->tcon;
+		pTcon = cifs_sb_tcon(cifs_sb);
 	else
 		return -EIO;
 
@@ -530,7 +530,7 @@  static void cifs_umount_begin(struct super_block *sb)
 	if (cifs_sb == NULL)
 		return;
 
-	tcon = cifs_sb->tcon;
+	tcon = cifs_sb_tcon(cifs_sb);
 	if (tcon == NULL)
 		return;
 
@@ -662,7 +662,7 @@  static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
 	    ((arg == F_WRLCK) &&
 		(CIFS_I(inode)->clientCanCacheAll)))
 		return generic_setlease(file, arg, lease);
-	else if (CIFS_SB(inode->i_sb)->tcon->local_lease &&
+	else if (cifs_sb_tcon(CIFS_SB(inode->i_sb))->local_lease &&
 			!CIFS_I(inode)->clientCanCacheRead)
 		/* If the server claims to support oplock on this
 		   file, then we still need to check oplock even
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 4f24590..79a75c4 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -400,6 +400,12 @@  CIFS_SB(struct super_block *sb)
 	return sb->s_fs_info;
 }
 
+static inline struct cifsTconInfo *
+cifs_sb_tcon(struct cifs_sb_info *cifs_sb)
+{
+	return cifs_sb->tcon;
+}
+
 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
 {
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index c3cce2e..09a1216 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3044,8 +3044,8 @@  cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
 	int rc = 0;
 	char *tmp;
 
-	if (cifs_sb->tcon)
-		cifs_put_tcon(cifs_sb->tcon);
+	if (cifs_sb_tcon(cifs_sb))
+		cifs_put_tcon(cifs_sb_tcon(cifs_sb));
 
 	cifs_sb->tcon = NULL;
 	tmp = cifs_sb->prepath;
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index e9f7ecc..572d31c 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -63,8 +63,8 @@  build_path_from_dentry(struct dentry *direntry)
 	cifs_sb = CIFS_SB(direntry->d_sb);
 	dirsep = CIFS_DIR_SEP(cifs_sb);
 	pplen = cifs_sb->prepathlen;
-	if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS))
-		dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1);
+	if (cifs_sb_tcon(cifs_sb) && (cifs_sb_tcon(cifs_sb)->Flags & SMB_SHARE_IS_IN_DFS))
+		dfsplen = strnlen(cifs_sb_tcon(cifs_sb)->treeName, MAX_TREE_SIZE + 1);
 	else
 		dfsplen = 0;
 cifs_bp_rename_retry:
@@ -117,7 +117,7 @@  cifs_bp_rename_retry:
 	/* BB test paths to Windows with '/' in the midst of prepath */
 
 	if (dfsplen) {
-		strncpy(full_path, cifs_sb->tcon->treeName, dfsplen);
+		strncpy(full_path, cifs_sb_tcon(cifs_sb)->treeName, dfsplen);
 		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
 			int i;
 			for (i = 0; i < dfsplen; i++) {
@@ -160,7 +160,7 @@  cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle,
 	slow_work_init(&pCifsFile->oplock_break, &cifs_oplock_break_ops);
 
 	write_lock(&GlobalSMBSeslock);
-	list_add(&pCifsFile->tlist, &cifs_sb->tcon->openFileList);
+	list_add(&pCifsFile->tlist, &cifs_sb_tcon(cifs_sb)->openFileList);
 	pCifsInode = CIFS_I(newinode);
 	if (pCifsInode) {
 		/* if readable file instance put first in list*/
@@ -225,7 +225,7 @@  int cifs_posix_open(char *full_path, struct inode **pinode,
 		posix_flags |= SMB_O_DIRECT;
 
 	mode &= ~current_umask();
-	rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode,
+	rc = CIFSPOSIXCreate(xid, cifs_sb_tcon(cifs_sb), posix_flags, mode,
 			pnetfid, presp_data, poplock, full_path,
 			cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 					CIFS_MOUNT_MAP_SPECIAL_CHR);
@@ -300,7 +300,7 @@  cifs_create(struct inode *inode, struct dentry *direntry, int mode,
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	tcon = cifs_sb->tcon;
+	tcon = cifs_sb_tcon(cifs_sb);
 
 	full_path = build_path_from_dentry(direntry);
 	if (full_path == NULL) {
@@ -378,7 +378,7 @@  cifs_create(struct inode *inode, struct dentry *direntry, int mode,
 	if (!tcon->unix_ext && (mode & S_IWUGO) == 0)
 		create_options |= CREATE_OPTION_READONLY;
 
-	if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
+	if (cifs_sb_tcon(cifs_sb)->ses->capabilities & CAP_NT_SMBS)
 		rc = CIFSSMBOpen(xid, tcon, full_path, disposition,
 			 desiredAccess, create_options,
 			 &fileHandle, &oplock, buf, cifs_sb->local_nls,
@@ -490,7 +490,7 @@  int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	full_path = build_path_from_dentry(direntry);
 	if (full_path == NULL)
@@ -622,7 +622,7 @@  cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
 	/* check whether path exists */
 
 	cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	/*
 	 * Don't allow the separator character in a path component.
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 031ccae..2e4771f 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -268,7 +268,7 @@  int cifs_open(struct inode *inode, struct file *file)
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	tcon = cifs_sb->tcon;
+	tcon = cifs_sb_tcon(cifs_sb);
 
 	pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
 	pCifsFile = cifs_fill_filedata(file);
@@ -370,7 +370,7 @@  int cifs_open(struct inode *inode, struct file *file)
 		goto out;
 	}
 
-	if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
+	if (cifs_sb_tcon(cifs_sb)->ses->capabilities & CAP_NT_SMBS)
 		rc = CIFSSMBOpen(xid, tcon, full_path, disposition,
 			 desiredAccess, CREATE_NOT_DIR, &netfid, &oplock, buf,
 			 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags
@@ -484,7 +484,7 @@  static int cifs_reopen_file(struct file *file, bool can_flush)
 	}
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	tcon = cifs_sb->tcon;
+	tcon = cifs_sb_tcon(cifs_sb);
 
 /* can not grab rename sem here because various ops, including
    those that already have the rename sem can end up causing writepage
@@ -599,7 +599,7 @@  int cifs_close(struct inode *inode, struct file *file)
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 	if (pSMBFile) {
 		struct cifsLockInfo *li, *tmp;
 		write_lock(&GlobalSMBSeslock);
@@ -683,7 +683,7 @@  int cifs_closedir(struct inode *inode, struct file *file)
 		struct cifs_sb_info *cifs_sb =
 			CIFS_SB(file->f_path.dentry->d_sb);
 
-		pTcon = cifs_sb->tcon;
+		pTcon = cifs_sb_tcon(cifs_sb);
 
 		cFYI(1, ("Freeing private data in close dir"));
 		write_lock(&GlobalSMBSeslock);
@@ -793,7 +793,7 @@  int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
 		cFYI(1, ("Unknown type of lock"));
 
 	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-	tcon = cifs_sb->tcon;
+	tcon = cifs_sb_tcon(cifs_sb);
 
 	if (file->private_data == NULL) {
 		rc = -EBADF;
@@ -986,7 +986,7 @@  ssize_t cifs_user_write(struct file *file, const char __user *write_data,
 
 	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
 
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	/* cFYI(1,
 	   (" write %d bytes to offset %lld of %s", write_size,
@@ -1089,7 +1089,7 @@  static ssize_t cifs_write(struct file *file, const char *write_data,
 
 	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
 
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	cFYI(1, ("write %zd bytes to offset %lld of %s", write_size,
 	   *poffset, file->f_path.dentry->d_name.name));
@@ -1317,7 +1317,7 @@  static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
 
 	inode = page->mapping->host;
 	cifs_sb = CIFS_SB(inode->i_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	offset += (loff_t)from;
 	write_data = kmap(page);
@@ -1392,7 +1392,7 @@  static int cifs_writepages(struct address_space *mapping,
 	if (cifs_sb->wsize < PAGE_CACHE_SIZE)
 		return generic_writepages(mapping, wbc);
 
-	if (cifs_sb->tcon->ses->sign && !experimEnabled)
+	if (cifs_sb_tcon(cifs_sb)->ses->sign && !experimEnabled)
 		return generic_writepages(mapping, wbc);
 
 	iov = kmalloc(32 * sizeof(struct kvec), GFP_KERNEL);
@@ -1523,7 +1523,7 @@  retry:
 				rc = -EBADF;
 			} else {
 				long_op = cifs_write_timeout(cifsi, offset);
-				rc = CIFSSMBWrite2(xid, cifs_sb->tcon,
+				rc = CIFSSMBWrite2(xid, cifs_sb_tcon(cifs_sb),
 						   open_file->netfid,
 						   bytes_to_write, offset,
 						   &bytes_written, iov, n_iov,
@@ -1541,7 +1541,7 @@  retry:
 					else
 						set_bit(AS_EIO, &mapping->flags);
 				} else {
-					cifs_stats_bytes_written(cifs_sb->tcon,
+					cifs_stats_bytes_written(cifs_sb_tcon(cifs_sb),
 								 bytes_written);
 				}
 			}
@@ -1687,7 +1687,7 @@  int cifs_fsync(struct file *file, struct dentry *dentry, int datasync)
 	if (rc == 0) {
 		rc = CIFS_I(inode)->write_behind_rc;
 		CIFS_I(inode)->write_behind_rc = 0;
-		tcon = CIFS_SB(inode->i_sb)->tcon;
+		tcon = cifs_sb_tcon(CIFS_SB(inode->i_sb));
 		if (!rc && tcon && smbfile &&
 		   !(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC))
 			rc = CIFSSMBFlush(xid, tcon, smbfile->netfid);
@@ -1772,7 +1772,7 @@  ssize_t cifs_user_read(struct file *file, char __user *read_data,
 
 	xid = GetXid();
 	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	if (file->private_data == NULL) {
 		rc = -EBADF;
@@ -1853,7 +1853,7 @@  static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
 
 	xid = GetXid();
 	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	if (file->private_data == NULL) {
 		rc = -EBADF;
@@ -1996,7 +1996,7 @@  static int cifs_readpages(struct file *file, struct address_space *mapping,
 	}
 	open_file = (struct cifsFileInfo *)file->private_data;
 	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	pagevec_init(&lru_pvec, 0);
 	cFYI(DBG2, ("rpages: num pages %d", num_pages));
@@ -2330,7 +2330,7 @@  cifs_oplock_break(struct slow_work *work)
 	 * disconnected since oplock already released by the server
 	 */
 	if (!cfile->closePend && !cfile->oplock_break_cancelled) {
-		rc = CIFSSMBLock(0, cifs_sb->tcon, cfile->netfid, 0, 0, 0, 0,
+		rc = CIFSSMBLock(0, cifs_sb_tcon(cifs_sb), cfile->netfid, 0, 0, 0, 0,
 				 LOCKING_ANDX_OPLOCK_RELEASE, false);
 		cFYI(1, ("Oplock release rc = %d", rc));
 	}
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 35ec117..cc473d5 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -51,7 +51,7 @@  static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
 
 
 		/* check if server can support readpages */
-		if (cifs_sb->tcon->ses->server->maxBuf <
+		if (cifs_sb_tcon(cifs_sb)->ses->server->maxBuf <
 				PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 			inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 		else
@@ -277,7 +277,7 @@  int cifs_get_file_info_unix(struct file *filp)
 	struct cifs_fattr fattr;
 	struct inode *inode = filp->f_path.dentry->d_inode;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *tcon = cifs_sb->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb);
 	struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
 
 	xid = GetXid();
@@ -304,7 +304,7 @@  int cifs_get_inode_info_unix(struct inode **pinode,
 	struct cifsTconInfo *tcon;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 
-	tcon = cifs_sb->tcon;
+	tcon = cifs_sb_tcon(cifs_sb);
 	cFYI(1, ("Getting info on %s", full_path));
 
 	/* could have done a find first instead but this returns more info */
@@ -341,7 +341,7 @@  cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path,
 	int rc;
 	int oplock = 0;
 	__u16 netfid;
-	struct cifsTconInfo *pTcon = cifs_sb->tcon;
+	struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb);
 	char buf[24];
 	unsigned int bytes_read;
 	char *pbuf;
@@ -430,7 +430,7 @@  static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
 	char ea_value[4];
 	__u32 mode;
 
-	rc = CIFSSMBQAllEAs(xid, cifs_sb->tcon, path, "SETFILEBITS",
+	rc = CIFSSMBQAllEAs(xid, cifs_sb_tcon(cifs_sb), path, "SETFILEBITS",
 			    ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 			    cifs_sb->mnt_cifs_flags &
 				CIFS_MOUNT_MAP_SPECIAL_CHR);
@@ -470,8 +470,8 @@  cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
 	fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
 
 	if (adjust_tz) {
-		fattr->cf_ctime.tv_sec += cifs_sb->tcon->ses->server->timeAdj;
-		fattr->cf_mtime.tv_sec += cifs_sb->tcon->ses->server->timeAdj;
+		fattr->cf_ctime.tv_sec += cifs_sb_tcon(cifs_sb)->ses->server->timeAdj;
+		fattr->cf_mtime.tv_sec += cifs_sb_tcon(cifs_sb)->ses->server->timeAdj;
 	}
 
 	fattr->cf_eof = le64_to_cpu(info->EndOfFile);
@@ -503,7 +503,7 @@  int cifs_get_file_info(struct file *filp)
 	struct cifs_fattr fattr;
 	struct inode *inode = filp->f_path.dentry->d_inode;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *tcon = cifs_sb->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb);
 	struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
 
 	xid = GetXid();
@@ -547,7 +547,7 @@  int cifs_get_inode_info(struct inode **pinode,
 	bool adjustTZ = false;
 	struct cifs_fattr fattr;
 
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 	cFYI(1, ("Getting info on %s", full_path));
 
 	if ((pfindData == NULL) && (*pinode != NULL)) {
@@ -680,8 +680,8 @@  char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb)
 		return full_path;
 	}
 
-	if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS))
-		dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1);
+	if (cifs_sb_tcon(cifs_sb) && (cifs_sb_tcon(cifs_sb)->Flags & SMB_SHARE_IS_IN_DFS))
+		dfsplen = strnlen(cifs_sb_tcon(cifs_sb)->treeName, MAX_TREE_SIZE + 1);
 	else
 		dfsplen = 0;
 
@@ -690,7 +690,7 @@  char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb)
 		return full_path;
 
 	if (dfsplen) {
-		strncpy(full_path, cifs_sb->tcon->treeName, dfsplen);
+		strncpy(full_path, cifs_sb_tcon(cifs_sb)->treeName, dfsplen);
 		/* switch slash direction in prepath depending on whether
 		 * windows or posix style path names
 		 */
@@ -770,7 +770,7 @@  struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
 		return ERR_PTR(-ENOMEM);
 
 	xid = GetXid();
-	if (cifs_sb->tcon->unix_ext)
+	if (cifs_sb_tcon(cifs_sb)->unix_ext)
 		rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
 	else
 		rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
@@ -779,7 +779,7 @@  struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
 	if (!inode)
 		return ERR_PTR(-ENOMEM);
 
-	if (rc && cifs_sb->tcon->ipc) {
+	if (rc && cifs_sb_tcon(cifs_sb)->ipc) {
 		cFYI(1, ("ipc connection - fake read inode"));
 		inode->i_mode |= S_IFDIR;
 		inode->i_nlink = 2;
@@ -815,7 +815,7 @@  cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
 	struct cifsFileInfo *open_file;
 	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *pTcon = cifs_sb->tcon;
+	struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb);
 	FILE_BASIC_INFO	info_buf;
 
 	if (attrs == NULL)
@@ -921,7 +921,7 @@  cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid)
 	struct inode *inode = dentry->d_inode;
 	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *tcon = cifs_sb->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb);
 	__u32 dosattr, origattr;
 	FILE_BASIC_INFO *info_buf = NULL;
 
@@ -1032,7 +1032,7 @@  int cifs_unlink(struct inode *dir, struct dentry *dentry)
 	struct cifsInodeInfo *cifs_inode;
 	struct super_block *sb = dir->i_sb;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
-	struct cifsTconInfo *tcon = cifs_sb->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb);
 	struct iattr *attrs = NULL;
 	__u32 dosattr = 0, origattr = 0;
 
@@ -1134,7 +1134,7 @@  int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	full_path = build_path_from_dentry(direntry);
 	if (full_path == NULL) {
@@ -1314,7 +1314,7 @@  int cifs_rmdir(struct inode *inode, struct dentry *direntry)
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	full_path = build_path_from_dentry(direntry);
 	if (full_path == NULL) {
@@ -1355,7 +1355,7 @@  cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
 		struct dentry *to_dentry, const char *toPath)
 {
 	struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
-	struct cifsTconInfo *pTcon = cifs_sb->tcon;
+	struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb);
 	__u16 srcfid;
 	int oplock, rc;
 
@@ -1404,7 +1404,7 @@  int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
 
 	cifs_sb_target = CIFS_SB(target_dir->i_sb);
 	cifs_sb_source = CIFS_SB(source_dir->i_sb);
-	tcon = cifs_sb_source->tcon;
+	tcon = cifs_sb_tcon(cifs_sb_source);
 
 	xid = GetXid();
 
@@ -1412,7 +1412,7 @@  int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
 	 * BB: this might be allowed if same server, but different share.
 	 * Consider adding support for this
 	 */
-	if (tcon != cifs_sb_target->tcon) {
+	if (tcon != cifs_sb_tcon(cifs_sb_target)) {
 		rc = -EXDEV;
 		goto cifs_rename_exit;
 	}
@@ -1540,7 +1540,7 @@  int cifs_revalidate_file(struct file *filp)
 	if (!cifs_inode_needs_reval(inode))
 		goto check_inval;
 
-	if (CIFS_SB(inode->i_sb)->tcon->unix_ext)
+	if (cifs_sb_tcon(CIFS_SB(inode->i_sb))->unix_ext)
 		rc = cifs_get_file_info_unix(filp);
 	else
 		rc = cifs_get_file_info(filp);
@@ -1581,7 +1581,7 @@  int cifs_revalidate_dentry(struct dentry *dentry)
 		 "jiffies %ld", full_path, inode, inode->i_count.counter,
 		 dentry, dentry->d_time, jiffies));
 
-	if (CIFS_SB(sb)->tcon->unix_ext)
+	if (cifs_sb_tcon(CIFS_SB(sb))->unix_ext)
 		rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
 	else
 		rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
@@ -1655,7 +1655,7 @@  cifs_set_file_size(struct inode *inode, struct iattr *attrs,
 	struct cifsFileInfo *open_file;
 	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *pTcon = cifs_sb->tcon;
+	struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb);
 
 	/*
 	 * To avoid spurious oplock breaks from server, in the case of
@@ -1733,7 +1733,7 @@  cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
 	struct inode *inode = direntry->d_inode;
 	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *pTcon = cifs_sb->tcon;
+	struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb);
 	struct cifs_unix_set_info_args *args = NULL;
 	struct cifsFileInfo *open_file;
 
@@ -1999,7 +1999,7 @@  cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 {
 	struct inode *inode = direntry->d_inode;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *pTcon = cifs_sb->tcon;
+	struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb);
 
 	if (pTcon->unix_ext)
 		return cifs_setattr_unix(direntry, attrs);
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index f946506..c28dc62 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -52,7 +52,7 @@  long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
 	cifs_sb = CIFS_SB(inode->i_sb);
 
 #ifdef CONFIG_CIFS_POSIX
-	tcon = cifs_sb->tcon;
+	tcon = cifs_sb_tcon(cifs_sb);
 	if (tcon)
 		caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
 	else {
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index c1a9d42..deff001 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -44,7 +44,7 @@  cifs_hardlink(struct dentry *old_file, struct inode *inode,
 	xid = GetXid();
 
 	cifs_sb_target = CIFS_SB(inode->i_sb);
-	pTcon = cifs_sb_target->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb_target);
 
 /* No need to check for cross device links since server will do that
    BB note DFS case in future though (when we may have to check) */
@@ -113,7 +113,7 @@  cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
 	char *full_path = NULL;
 	char *target_path = NULL;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *tcon = cifs_sb->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb);
 
 	xid = GetXid();
 
@@ -168,7 +168,7 @@  cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname)
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	full_path = build_path_from_dentry(direntry);
 
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 7b783d1..789cf12 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -724,6 +724,6 @@  cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb)
 			   "properly. Hardlinks will not be recognized on this "
 			   "mount. Consider mounting with the \"noserverino\" "
 			   "option to silence this message.",
-			   cifs_sb->tcon->treeName));
+			   cifs_sb_tcon(cifs_sb)->treeName));
 	}
 }
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 18e0bc1..9854d09 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -102,7 +102,7 @@  cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
 		return NULL;
 	}
 
-	if (CIFS_SB(sb)->tcon->nocase)
+	if (cifs_sb_tcon(CIFS_SB(sb))->nocase)
 		dentry->d_op = &cifs_ci_dentry_ops;
 	else
 		dentry->d_op = &cifs_dentry_ops;
@@ -171,7 +171,7 @@  static void
 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
 		       struct cifs_sb_info *cifs_sb)
 {
-	int offset = cifs_sb->tcon->ses->server->timeAdj;
+	int offset = cifs_sb_tcon(cifs_sb)->ses->server->timeAdj;
 
 	memset(fattr, 0, sizeof(*fattr));
 	fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
@@ -199,7 +199,7 @@  int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
 	int len;
 	int oplock = 0;
 	int rc;
-	struct cifsTconInfo *ptcon = cifs_sb->tcon;
+	struct cifsTconInfo *ptcon = cifs_sb_tcon(cifs_sb);
 	char *tmpbuffer;
 
 	rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
@@ -243,7 +243,7 @@  static int initiate_cifs_search(const int xid, struct file *file)
 	if (cifs_sb == NULL)
 		return -EINVAL;
 
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 	if (pTcon == NULL)
 		return -EINVAL;
 
@@ -778,7 +778,7 @@  int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 	if (pTcon == NULL)
 		return -EINVAL;
 
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index f555ce0..2161019 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -61,7 +61,7 @@  int cifs_removexattr(struct dentry *direntry, const char *ea_name)
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	full_path = build_path_from_dentry(direntry);
 	if (full_path == NULL) {
@@ -116,7 +116,7 @@  int cifs_setxattr(struct dentry *direntry, const char *ea_name,
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	full_path = build_path_from_dentry(direntry);
 	if (full_path == NULL) {
@@ -224,7 +224,7 @@  ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	full_path = build_path_from_dentry(direntry);
 	if (full_path == NULL) {
@@ -346,7 +346,7 @@  ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
 		return -EIO;
 
 	cifs_sb = CIFS_SB(sb);
-	pTcon = cifs_sb->tcon;
+	pTcon = cifs_sb_tcon(cifs_sb);
 
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
 		return -EOPNOTSUPP;