[PATCH 07/15] cifs: make various routines use the cifsFileInfo->tcon pointer

From: Jeff Layton <[email protected]>

...where it's available and appropriate.

Signed-off-by: Jeff Layton <[email protected]>
---
 fs/cifs/cifsfs.c  |    4 ++--
 fs/cifs/file.c    |   40 ++++++++++++++++++----------------------
 fs/cifs/inode.c   |   22 ++++++++++++++++------
 fs/cifs/ioctl.c   |   19 ++++---------------
 fs/cifs/readdir.c |   18 ++++++++----------
 5 files changed, 48 insertions(+), 55 deletions(-)

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index e7fcd07..e3149c0 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -652,6 +652,7 @@ static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
 	/* note that this is called by vfs setlease with the BKL held
 	   although I doubt that BKL is needed here in cifs */
 	struct inode *inode = file->f_path.dentry->d_inode;
+	struct cifsFileInfo *cfile = file->private_data;
 
 	if (!(S_ISREG(inode->i_mode)))
 		return -EINVAL;
@@ -662,8 +663,7 @@ 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_tcon(CIFS_SB(inode->i_sb))->local_lease &&
-			!CIFS_I(inode)->clientCanCacheRead)
+	else if (cfile->tcon->local_lease && !CIFS_I(inode)->clientCanCacheRead)
 		/* If the server claims to support oplock on this
 		   file, then we still need to check oplock even
 		   if the local_lease mount option is set, but there
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index d66c79e..6377cb8 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -483,7 +483,7 @@ static int cifs_reopen_file(struct file *file, bool can_flush)
 	}
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	tcon = cifs_sb_tcon(cifs_sb);
+	tcon = pCifsFile->tcon;
 
 /* can not grab rename sem here because various ops, including
    those that already have the rename sem can end up causing writepage
@@ -598,7 +598,7 @@ int cifs_close(struct inode *inode, struct file *file)
 	xid = GetXid();
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-	pTcon = cifs_sb_tcon(cifs_sb);
+	pTcon = pSMBFile->tcon;
 	if (pSMBFile) {
 		struct cifsLockInfo *li, *tmp;
 		write_lock(&GlobalSMBSeslock);
@@ -679,10 +679,7 @@ int cifs_closedir(struct inode *inode, struct file *file)
 
 	if (pCFileStruct) {
 		struct cifsTconInfo *pTcon;
-		struct cifs_sb_info *cifs_sb =
-			CIFS_SB(file->f_path.dentry->d_sb);
-
-		pTcon = cifs_sb_tcon(cifs_sb);
+		pTcon = pCFileStruct->tcon;
 
 		cFYI(1, ("Freeing private data in close dir"));
 		write_lock(&GlobalSMBSeslock);
@@ -792,7 +789,7 @@ 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(cifs_sb);
+	tcon = ((struct cifsFileInfo *)file->private_data)->tcon;
 
 	if (file->private_data == NULL) {
 		rc = -EBADF;
@@ -961,8 +958,6 @@ 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(cifs_sb);
-
 	/* cFYI(1,
 	   (" write %d bytes to offset %lld of %s", write_size,
 	   *poffset, file->f_path.dentry->d_name.name)); */
@@ -970,6 +965,7 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
 	if (file->private_data == NULL)
 		return -EBADF;
 	open_file = (struct cifsFileInfo *) file->private_data;
+	pTcon = open_file->tcon;
 
 	rc = generic_write_checks(file, poffset, &write_size, 0);
 	if (rc)
@@ -1064,14 +1060,14 @@ 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(cifs_sb);
-
 	cFYI(1, ("write %zd bytes to offset %lld of %s", write_size,
 	   *poffset, file->f_path.dentry->d_name.name));
 
 	if (file->private_data == NULL)
 		return -EBADF;
+
 	open_file = (struct cifsFileInfo *)file->private_data;
+	pTcon = open_file->tcon;
 
 	xid = GetXid();
 
@@ -1286,7 +1282,6 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
 	int rc = -EFAULT;
 	int bytes_written = 0;
 	struct cifs_sb_info *cifs_sb;
-	struct cifsTconInfo *pTcon;
 	struct inode *inode;
 	struct cifsFileInfo *open_file;
 
@@ -1295,7 +1290,6 @@ 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(cifs_sb);
 
 	offset += (loff_t)from;
 	write_data = kmap(page);
@@ -1354,6 +1348,7 @@ static int cifs_writepages(struct address_space *mapping,
 	int nr_pages;
 	__u64 offset = 0;
 	struct cifsFileInfo *open_file;
+	struct cifsTconInfo *tcon;
 	struct cifsInodeInfo *cifsi = CIFS_I(mapping->host);
 	struct page *page;
 	struct pagevec pvec;
@@ -1370,6 +1365,7 @@ static int cifs_writepages(struct address_space *mapping,
 	if (cifs_sb->wsize < PAGE_CACHE_SIZE)
 		return generic_writepages(mapping, wbc);
 
+	/* WTF? */
 	if ((cifs_sb_tcon(cifs_sb)->ses) && (cifs_sb_tcon(cifs_sb)->ses->server))
 		if (cifs_sb_tcon(cifs_sb)->ses->server->secMode &
 				(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
@@ -1380,7 +1376,6 @@ static int cifs_writepages(struct address_space *mapping,
 	if (iov == NULL)
 		return generic_writepages(mapping, wbc);
 
-
 	/*
 	 * BB: Is this meaningful for a non-block-device file system?
 	 * If it is, we should test it again after we do I/O
@@ -1503,8 +1498,9 @@ retry:
 				cERROR(1, ("No writable handles for inode"));
 				rc = -EBADF;
 			} else {
+				tcon = open_file->tcon;
 				long_op = cifs_write_timeout(cifsi, offset);
-				rc = CIFSSMBWrite2(xid, cifs_sb_tcon(cifs_sb),
+				rc = CIFSSMBWrite2(xid, tcon,
 						   open_file->netfid,
 						   bytes_to_write, offset,
 						   &bytes_written, iov, n_iov,
@@ -1522,7 +1518,7 @@ retry:
 					else
 						set_bit(AS_EIO, &mapping->flags);
 				} else {
-					cifs_stats_bytes_written(cifs_sb_tcon(cifs_sb),
+					cifs_stats_bytes_written(tcon,
 								 bytes_written);
 				}
 			}
@@ -1668,7 +1664,7 @@ 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_tcon(CIFS_SB(inode->i_sb));
+		tcon = smbfile->tcon;
 		if (!rc && tcon && smbfile &&
 		   !(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC))
 			rc = CIFSSMBFlush(xid, tcon, smbfile->netfid);
@@ -1753,7 +1749,6 @@ 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(cifs_sb);
 
 	if (file->private_data == NULL) {
 		rc = -EBADF;
@@ -1761,6 +1756,7 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data,
 		return rc;
 	}
 	open_file = (struct cifsFileInfo *)file->private_data;
+	pTcon = open_file->tcon;
 
 	if ((file->f_flags & O_ACCMODE) == O_WRONLY)
 		cFYI(1, ("attempting read on write only file instance"));
@@ -1834,14 +1830,15 @@ 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(cifs_sb);
 
 	if (file->private_data == NULL) {
 		rc = -EBADF;
 		FreeXid(xid);
 		return rc;
 	}
+
 	open_file = (struct cifsFileInfo *)file->private_data;
+	pTcon = open_file->tcon;
 
 	if ((file->f_flags & O_ACCMODE) == O_WRONLY)
 		cFYI(1, ("attempting read on write only file instance"));
@@ -2015,7 +2012,7 @@ 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(cifs_sb);
+	pTcon = open_file->tcon;
 
 	pagevec_init(&lru_pvec, 0);
 	cFYI(DBG2, ("rpages: num pages %d", num_pages));
@@ -2320,7 +2317,6 @@ cifs_oplock_break(struct slow_work *work)
 						  oplock_break);
 	struct inode *inode = cfile->pInode;
 	struct cifsInodeInfo *cinode = CIFS_I(inode);
-	struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->mnt->mnt_sb);
 	int rc, waitrc = 0;
 
 	if (inode && S_ISREG(inode->i_mode)) {
@@ -2349,7 +2345,7 @@ 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(cifs_sb), cfile->netfid, 0, 0, 0, 0,
+		rc = CIFSSMBLock(0, cfile->tcon, 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 1a2af03..8c912e1 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -276,8 +276,8 @@ 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(cifs_sb);
 	struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
+	struct cifsTconInfo *tcon = cfile->tcon;
 
 	xid = GetXid();
 	rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->netfid, &find_data);
@@ -502,8 +502,8 @@ 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(cifs_sb);
 	struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
+	struct cifsTconInfo *tcon = cfile->tcon;
 
 	xid = GetXid();
 	rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data);
@@ -813,7 +813,7 @@ 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(cifs_sb);
+	struct cifsTconInfo *pTcon;
 	FILE_BASIC_INFO	info_buf;
 
 	if (attrs == NULL)
@@ -856,9 +856,12 @@ cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
 	if (open_file) {
 		netfid = open_file->netfid;
 		netpid = open_file->pid;
+		pTcon = open_file->tcon;
 		goto set_via_filehandle;
 	}
 
+	pTcon = open_file->tcon;
+
 	/*
 	 * NT4 apparently returns success on this call, but it doesn't
 	 * really work.
@@ -1534,11 +1537,12 @@ int cifs_revalidate_file(struct file *filp)
 {
 	int rc = 0;
 	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
 
 	if (!cifs_inode_needs_reval(inode))
 		goto check_inval;
 
-	if (cifs_sb_tcon(CIFS_SB(inode->i_sb))->unix_ext)
+	if (cfile->tcon->unix_ext)
 		rc = cifs_get_file_info_unix(filp);
 	else
 		rc = cifs_get_file_info(filp);
@@ -1653,7 +1657,7 @@ 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(cifs_sb);
+	struct cifsTconInfo *pTcon = NULL;
 
 	/*
 	 * To avoid spurious oplock breaks from server, in the case of
@@ -1668,6 +1672,7 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
 	if (open_file) {
 		__u16 nfid = open_file->netfid;
 		__u32 npid = open_file->pid;
+		pTcon = open_file->tcon;
 		rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
 					npid, false);
 		cifsFileInfo_put(open_file);
@@ -1682,6 +1687,9 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
 		rc = -EINVAL;
 
 	if (rc != 0) {
+		if (pTcon == NULL)
+			pTcon = cifs_sb_tcon(cifs_sb);
+
 		/* Set file size by pathname rather than by handle
 		   either because no valid, writeable file handle for
 		   it was found or because there was an error setting
@@ -1731,7 +1739,7 @@ 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(cifs_sb);
+	struct cifsTconInfo *pTcon;
 	struct cifs_unix_set_info_args *args = NULL;
 	struct cifsFileInfo *open_file;
 
@@ -1824,9 +1832,11 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
 	if (open_file) {
 		u16 nfid = open_file->netfid;
 		u32 npid = open_file->pid;
+		pTcon = open_file->tcon;
 		rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
 		cifsFileInfo_put(open_file);
 	} else {
+		pTcon = cifs_sb_tcon(cifs_sb);
 		rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
 				    cifs_sb->local_nls,
 				    cifs_sb->mnt_cifs_flags &
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index c28dc62..a2c7ed4 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -37,12 +37,12 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
 	int xid;
 	struct cifs_sb_info *cifs_sb;
 #ifdef CONFIG_CIFS_POSIX
-	__u64	ExtAttrBits = 0;
-	__u64	ExtAttrMask = 0;
-	__u64   caps;
-	struct cifsTconInfo *tcon;
 	struct cifsFileInfo *pSMBFile =
 		(struct cifsFileInfo *)filep->private_data;
+	struct cifsTconInfo *tcon = pSMBFile->tcon;
+	__u64	ExtAttrBits = 0;
+	__u64	ExtAttrMask = 0;
+	__u64   caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
 #endif /* CONFIG_CIFS_POSIX */
 
 	xid = GetXid();
@@ -51,17 +51,6 @@ 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(cifs_sb);
-	if (tcon)
-		caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
-	else {
-		rc = -EIO;
-		FreeXid(xid);
-		return -EIO;
-	}
-#endif /* CONFIG_CIFS_POSIX */
-
 	switch (command) {
 		case CIFS_IOC_CHECKUMOUNT:
 			cFYI(1, ("User unmount attempted"));
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 74db1f0..491745f 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -227,22 +227,22 @@ static int initiate_cifs_search(const int xid, struct file *file)
 	struct cifs_sb_info *cifs_sb;
 	struct cifsTconInfo *pTcon;
 
-	if (file->private_data == NULL) {
+	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
+	if (cifs_sb == NULL)
+		return -EINVAL;
+
+	if (file->private_data == NULL)
 		file->private_data =
 			kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
-	}
 
 	if (file->private_data == NULL)
 		return -ENOMEM;
 	cifsFile = file->private_data;
 	cifsFile->invalidHandle = true;
 	cifsFile->srch_inf.endOfSearch = false;
+	cifsFile->tcon = cifs_sb_tcon(cifs_sb);
 
-	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-	if (cifs_sb == NULL)
-		return -EINVAL;
-
-	pTcon = cifs_sb_tcon(cifs_sb);
+	pTcon = cifsFile->tcon;
 	if (pTcon == NULL)
 		return -EINVAL;
 
@@ -777,9 +777,6 @@ 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(cifs_sb);
-	if (pTcon == NULL)
-		return -EINVAL;
 
 	switch ((int) file->f_pos) {
 	case 0:
@@ -829,6 +826,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
 			CIFSFindClose(xid, pTcon, cifsFile->netfid);
 		} */
 
+		pTcon = cifsFile->tcon;
 		rc = find_cifs_entry(xid, pTcon, file,
 				&current_entry, &num_to_fill);
 		if (rc) {
-- 
1.6.6.1

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