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Btrfs: Implement ACLs setting and getting

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ACLs are stored but not used for permission checks (yet)

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan
2008-01-14 13:26:08 -05:00
committed by Chris Mason
parent b3a0d8d28c
commit 744f52f997
3 changed files with 51 additions and 41 deletions
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73
fs/btrfs/acl.c
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@@ -22,53 +22,68 @@
#include <linux/posix_acl_xattr.h>
#include "ctree.h"
#include "xattr.h"
static int btrfs_xattr_set_acl(struct inode *inode, int type,
const void *value, size_t size)
{
int ret = 0;
struct posix_acl *acl;
/*
* FIXME: At this point this is all place holder stuff, we just return
* -EOPNOTSUPP so cp won't complain when it tries to copy over a file with an
* acl on it.
*/
if (!is_owner_or_cap(inode))
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
if (acl == NULL) {
value = NULL;
size = 0;
} else if (IS_ERR(acl)) {
ret = PTR_ERR(acl);
} else {
ret = posix_acl_valid(acl);
posix_acl_release(acl);
}
if (ret)
return ret;
}
return btrfs_xattr_set(inode, type, "", value, size, 0);
}
static int btrfs_xattr_get_acl(struct inode *inode, int type,
void *value, size_t size)
{
return btrfs_xattr_get(inode, type, "", value, size);
}
static int btrfs_xattr_acl_access_get(struct inode *inode, const char *name,
void *value, size_t size)
{
/*
return btrfs_xattr_get(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS, name,
value, size);
*/
return -EOPNOTSUPP;
if (*name != '\0')
return -EINVAL;
return btrfs_xattr_get_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS,
value, size);
}
static int btrfs_xattr_acl_access_set(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
/*
return btrfs_xattr_set(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS, name,
value, size, flags);
*/
return -EOPNOTSUPP;
if (*name != '\0')
return -EINVAL;
return btrfs_xattr_set_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS,
value, size);
}
static int btrfs_xattr_acl_default_get(struct inode *inode, const char *name,
void *value, size_t size)
{
/*
return btrfs_xattr_get(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT,
name, value, size);
*/
return -EOPNOTSUPP;
if (*name != '\0')
return -EINVAL;
return btrfs_xattr_get_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT,
value, size);
}
static int btrfs_xattr_acl_default_set(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
/*
return btrfs_xattr_set(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT,
name, value, size, flags);
*/
return -EOPNOTSUPP;
if (*name != '\0')
return -EINVAL;
return btrfs_xattr_set_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT,
value, size);
}
struct xattr_handler btrfs_xattr_acl_default_handler = {
.prefix = POSIX_ACL_XATTR_DEFAULT,
.list = btrfs_xattr_generic_list,