make generic_acl slightly more generic

Now that we cache the ACL pointers in the generic inode all the generic_acl
cruft can go away and generic_acl.c can directly implement xattr handlers
dealing with the full Posix ACL semantics for in-memory filesystems.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 0 insertions, 133 deletions

diff --git a/mm/shmem_acl.c b/mm/shmem_acl.c
deleted file mode 100644
index f8d5330ec0d..00000000000
--- a/mm/shmem_acl.c
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * mm/shmem_acl.c
- *
- * (C) 2005 Andreas Gruenbacher <agruen@suse.de>
- *
- * This file is released under the GPL.
- */
-
-#include <linux/fs.h>
-#include <linux/shmem_fs.h>
-#include <linux/xattr.h>
-#include <linux/generic_acl.h>
-
-/**
- * shmem_get_acl  -   generic_acl_operations->getacl() operation
- */
-static struct posix_acl *
-shmem_get_acl(struct inode *inode, int type)
-{
-	struct posix_acl *acl = NULL;
-
-	spin_lock(&inode->i_lock);
-	switch(type) {
-		case ACL_TYPE_ACCESS:
-			acl = posix_acl_dup(inode->i_acl);
-			break;
-
-		case ACL_TYPE_DEFAULT:
-			acl = posix_acl_dup(inode->i_default_acl);
-			break;
-	}
-	spin_unlock(&inode->i_lock);
-
-	return acl;
-}
-
-/**
- * shmem_set_acl  -   generic_acl_operations->setacl() operation
- */
-static void
-shmem_set_acl(struct inode *inode, int type, struct posix_acl *acl)
-{
-	struct posix_acl *free = NULL;
-
-	spin_lock(&inode->i_lock);
-	switch(type) {
-		case ACL_TYPE_ACCESS:
-			free = inode->i_acl;
-			inode->i_acl = posix_acl_dup(acl);
-			break;
-
-		case ACL_TYPE_DEFAULT:
-			free = inode->i_default_acl;
-			inode->i_default_acl = posix_acl_dup(acl);
-			break;
-	}
-	spin_unlock(&inode->i_lock);
-	posix_acl_release(free);
-}
-
-struct generic_acl_operations shmem_acl_ops = {
-	.getacl = shmem_get_acl,
-	.setacl = shmem_set_acl,
-};
-
-static size_t
-shmem_xattr_list_acl(struct dentry *dentry, char *list, size_t list_size,
-		const char *name, size_t name_len, int type)
-{
-	return generic_acl_list(dentry->d_inode, &shmem_acl_ops,
-				type, list, list_size);
-}
-
-static int
-shmem_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
-		     size_t size, int type)
-{
-	if (strcmp(name, "") != 0)
-		return -EINVAL;
-	return generic_acl_get(dentry->d_inode, &shmem_acl_ops, type,
-			       buffer, size);
-}
-
-static int
-shmem_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
-		     size_t size, int flags, int type)
-{
-	if (strcmp(name, "") != 0)
-		return -EINVAL;
-	return generic_acl_set(dentry->d_inode, &shmem_acl_ops, type,
-			       value, size);
-}
-
-struct xattr_handler shmem_xattr_acl_access_handler = {
-	.prefix = POSIX_ACL_XATTR_ACCESS,
-	.flags	= ACL_TYPE_ACCESS,
-	.list	= shmem_xattr_list_acl,
-	.get	= shmem_xattr_get_acl,
-	.set	= shmem_xattr_set_acl,
-};
-
-struct xattr_handler shmem_xattr_acl_default_handler = {
-	.prefix = POSIX_ACL_XATTR_DEFAULT,
-	.flags	= ACL_TYPE_DEFAULT,
-	.list	= shmem_xattr_list_acl,
-	.get	= shmem_xattr_get_acl,
-	.set	= shmem_xattr_set_acl,
-};
-
-/**
- * shmem_acl_init  -  Inizialize the acl(s) of a new inode
- */
-int
-shmem_acl_init(struct inode *inode, struct inode *dir)
-{
-	return generic_acl_init(inode, dir, &shmem_acl_ops);
-}
-
-/**
- * shmem_check_acl  -  check_acl() callback for generic_permission()
- */
-int
-shmem_check_acl(struct inode *inode, int mask)
-{
-	struct posix_acl *acl = shmem_get_acl(inode, ACL_TYPE_ACCESS);
-
-	if (acl) {
-		int error = posix_acl_permission(inode, acl, mask);
-		posix_acl_release(acl);
-		return error;
-	}
-	return -EAGAIN;
-}