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authorChristoph Hellwig <hch@lst.de>2009-11-03 16:44:44 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2009-12-16 12:16:49 -0500
commit1c7c474c31aea6d5cb2fb35f31d9e9e91ae466b1 (patch)
tree89a5fd1146be1744ce3ac94789542841512315b8 /mm/shmem_acl.c
parent431547b3c4533b8c7fd150ab36980b9a3147797b (diff)
downloadlinux-sh-1c7c474c31aea6d5cb2fb35f31d9e9e91ae466b1.tar.gz
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>
Diffstat (limited to 'mm/shmem_acl.c')
-rw-r--r--mm/shmem_acl.c133
1 files changed, 0 insertions, 133 deletions
diff --git a/mm/shmem_acl.c b/mm/shmem_acl.c
deleted file mode 100644
index f8d5330ec0d7..000000000000
--- 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;
-}