Remove arbitrary #acl entries limits on ext[23] when writing

This patch removes the arbitrary limit of 32 ACL entries on
ext[23] when writing. With the path applied, the available space in
the xattr block determines the effective number-of-entries limit.
Even before this patch the xattr block could contain less space than
required for the acl, so no additional error conditions are introduced.

When kernels without the ext23-no-ace-read-limit.diff patch try to
access a file with an acl that is too big, they will return ERANGE
in the getxattr syscalls; access to the file will be denied. Big acls
can still be replaced with `setfacl --set'.

  Andreas Gruenbacher <agruen@suse.de>, SUSE Labs


Index: linux-2.6.2/fs/ext2/acl.c
===================================================================
--- linux-2.6.2.orig/fs/ext2/acl.c
+++ linux-2.6.2/fs/ext2/acl.c
@@ -255,8 +255,6 @@ ext2_set_acl(struct inode *inode, int ty
 			return -EINVAL;
 	}
  	if (acl) {
-		if (acl->a_count > EXT2_ACL_MAX_ENTRIES)
-			return -EINVAL;
 		value = ext2_acl_to_disk(acl, &size);
 		if (IS_ERR(value))
 			return (int)PTR_ERR(value);
Index: linux-2.6.2/fs/ext2/acl.h
===================================================================
--- linux-2.6.2.orig/fs/ext2/acl.h
+++ linux-2.6.2/fs/ext2/acl.h
@@ -7,7 +7,6 @@
 #include <linux/xattr_acl.h>
 
 #define EXT2_ACL_VERSION	0x0001
-#define EXT2_ACL_MAX_ENTRIES	32
 
 typedef struct {
 	__u16		e_tag;
Index: linux-2.6.2/fs/ext3/acl.c
===================================================================
--- linux-2.6.2.orig/fs/ext3/acl.c
+++ linux-2.6.2/fs/ext3/acl.c
@@ -259,8 +259,6 @@ ext3_set_acl(handle_t *handle, struct in
 			return -EINVAL;
 	}
  	if (acl) {
-		if (acl->a_count > EXT3_ACL_MAX_ENTRIES)
-			return -EINVAL;
 		value = ext3_acl_to_disk(acl, &size);
 		if (IS_ERR(value))
 			return (int)PTR_ERR(value);
Index: linux-2.6.2/fs/ext3/acl.h
===================================================================
--- linux-2.6.2.orig/fs/ext3/acl.h
+++ linux-2.6.2/fs/ext3/acl.h
@@ -7,7 +7,6 @@
 #include <linux/xattr_acl.h>
 
 #define EXT3_ACL_VERSION	0x0001
-#define EXT3_ACL_MAX_ENTRIES	32
 
 typedef struct {
 	__u16		e_tag;