cifs: merge CIFSSMBQueryEA with CIFSSMBQAllEAs

Add an "ea_name" parameter to CIFSSMBQAllEAs. When it's set make it
behave like CIFSSMBQueryEA does now. The current callers of
CIFSSMBQueryEA are converted to use CIFSSMBQAllEAs, and the old
CIFSSMBQueryEA function is removed.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/xattr.c

@@ -244,7 +244,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
 			/* revalidate/getattr then populate from inode */
 		} /* BB add else when above is implemented */
 		ea_name += 5; /* skip past user. prefix */
-		rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
+		rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
 			buf_size, cifs_sb->local_nls,
 			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 	} else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
@@ -252,7 +252,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
 			goto get_ea_exit;
 
 		ea_name += 4; /* skip past os2. prefix */
-		rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
+		rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
 			buf_size, cifs_sb->local_nls,
 			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 	} else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
@@ -364,8 +364,8 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
 	/* if proc/fs/cifs/streamstoxattr is set then
 		search server for EAs or streams to
 		returns as xattrs */
-	rc = CIFSSMBQAllEAs(xid, pTcon, full_path, data, buf_size,
-				cifs_sb->local_nls,
+	rc = CIFSSMBQAllEAs(xid, pTcon, full_path, NULL, data,
+				buf_size, cifs_sb->local_nls,
 				cifs_sb->mnt_cifs_flags &
 					CIFS_MOUNT_MAP_SPECIAL_CHR);