cifs: Rename and cleanup open_query_close_cifs_symlink()

Rename open_query_close_cifs_symlink to cifs_query_mf_symlink() to make
the name more consistent with other protocol version specific functions.

We also pass tcon as an argument to the function. This is already
available in the calling functions and we can avoid having to make an
unnecessary lookup.

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

fs/cifs/cifsglob.h

@@ -370,8 +370,9 @@ struct smb_version_operations {
 	void (*new_lease_key)(struct cifs_fid *);
 	int (*generate_signingkey)(struct cifs_ses *);
 	int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
-	int (*query_mf_symlink)(const unsigned char *, char *, unsigned int *,
-				struct cifs_sb_info *, unsigned int);
+	int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
+				struct cifs_sb_info *, const unsigned char *,
+				char *, unsigned int *);
 	/* if we can do cache read operations */
 	bool (*is_read_op)(__u32);
 	/* set oplock level for the inode */

fs/cifs/cifsproto.h

@@ -496,7 +496,8 @@ void cifs_writev_complete(struct work_struct *work);
 struct cifs_writedata *cifs_writedata_alloc(unsigned int nr_pages,
 						work_func_t complete);
 void cifs_writedata_release(struct kref *refcount);
-int open_query_close_cifs_symlink(const unsigned char *path, char *pbuf,
-			unsigned int *pbytes_read, struct cifs_sb_info *cifs_sb,
-			unsigned int xid);
+int cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+			  struct cifs_sb_info *cifs_sb,
+			  const unsigned char *path, char *pbuf,
+			  unsigned int *pbytes_read);
 #endif			/* _CIFSPROTO_H */

fs/cifs/link.c

@@ -305,54 +305,41 @@ CIFSCouldBeMFSymlink(const struct cifs_fattr *fattr)
 }
 
 int
-open_query_close_cifs_symlink(const unsigned char *path, char *pbuf,
-			unsigned int *pbytes_read, struct cifs_sb_info *cifs_sb,
-			unsigned int xid)
+cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+		      struct cifs_sb_info *cifs_sb, const unsigned char *path,
+		      char *pbuf, unsigned int *pbytes_read)
 {
 	int rc;
 	int oplock = 0;
 	__u16 netfid = 0;
-	struct tcon_link *tlink;
-	struct cifs_tcon *ptcon;
 	struct cifs_io_parms io_parms;
 	int buf_type = CIFS_NO_BUFFER;
 	FILE_ALL_INFO file_info;
 
-	tlink = cifs_sb_tlink(cifs_sb);
-	if (IS_ERR(tlink))
-		return PTR_ERR(tlink);
-	ptcon = tlink_tcon(tlink);
-
-	rc = CIFSSMBOpen(xid, ptcon, path, FILE_OPEN, GENERIC_READ,
+	rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, GENERIC_READ,
 			 CREATE_NOT_DIR, &netfid, &oplock, &file_info,
 			 cifs_sb->local_nls,
 			 cifs_sb->mnt_cifs_flags &
 				CIFS_MOUNT_MAP_SPECIAL_CHR);
-	if (rc != 0) {
-		cifs_put_tlink(tlink);
+	if (rc)
 		return rc;
-	}
 
-	if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
-		CIFSSMBClose(xid, ptcon, netfid);
-		cifs_put_tlink(tlink);
+	if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE))
 		/* it's not a symlink */
-		return rc;
-	}
+		goto out;
 
 	io_parms.netfid = netfid;
 	io_parms.pid = current->tgid;
-	io_parms.tcon = ptcon;
+	io_parms.tcon = tcon;
 	io_parms.offset = 0;
 	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
 
 	rc = CIFSSMBRead(xid, &io_parms, pbytes_read, &pbuf, &buf_type);
-	CIFSSMBClose(xid, ptcon, netfid);
-	cifs_put_tlink(tlink);
+out:
+	CIFSSMBClose(xid, tcon, netfid);
 	return rc;
 }
 
-
 int
 CIFSCheckMFSymlink(unsigned int xid, struct cifs_tcon *tcon,
 		   struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr,
@@ -372,8 +359,8 @@ CIFSCheckMFSymlink(unsigned int xid, struct cifs_tcon *tcon,
 		return -ENOMEM;
 
 	if (tcon->ses->server->ops->query_mf_symlink)
-		rc = tcon->ses->server->ops->query_mf_symlink(path, buf,
-						&bytes_read, cifs_sb, xid);
+		rc = tcon->ses->server->ops->query_mf_symlink(xid, tcon,
+					      cifs_sb, path, buf, &bytes_read);
 	else
 		rc = -ENOSYS;
 

fs/cifs/smb1ops.c

@@ -1009,7 +1009,7 @@ struct smb_version_operations smb1_operations = {
 	.mand_lock = cifs_mand_lock,
 	.mand_unlock_range = cifs_unlock_range,
 	.push_mand_locks = cifs_push_mandatory_locks,
-	.query_mf_symlink = open_query_close_cifs_symlink,
+	.query_mf_symlink = cifs_query_mf_symlink,
 	.is_read_op = cifs_is_read_op,
 };