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#include <linux/reiserfs_fs.h>

#include <linux/capability.h>

#include <linux/errno.h>

#include <linux/fs.h>

#include <linux/pagemap.h>

#include <linux/xattr.h>

#include <linux/reiserfs_xattr.h>

#include <asm/uaccess.h>

#define XATTR_TRUSTED_PREFIX "trusted."

static int

trusted_get(struct inode *inode, const char *name, void *buffer, size_t size)

{

        if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))

                return -EINVAL;

        if (!reiserfs_xattrs(inode->i_sb))

                return -EOPNOTSUPP;

        if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))

                return -EPERM;

        return reiserfs_xattr_get(inode, name, buffer, size);

}

static int

trusted_set(struct inode *inode, const char *name, const void *buffer,

            size_t size, int flags)

{

        if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))

                return -EINVAL;

        if (!reiserfs_xattrs(inode->i_sb))

                return -EOPNOTSUPP;

        if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))

                return -EPERM;

        return reiserfs_xattr_set(inode, name, buffer, size, flags);

}

static int trusted_del(struct inode *inode, const char *name)

{

        if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))

                return -EINVAL;

        if (!reiserfs_xattrs(inode->i_sb))

                return -EOPNOTSUPP;

        if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))

                return -EPERM;

        return 0;

}

static int

trusted_list(struct inode *inode, const char *name, int namelen, char *out)

{

        int len = namelen;

        if (!reiserfs_xattrs(inode->i_sb))

                return 0;

        if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))

                return 0;

        if (out)

                memcpy(out, name, len);

        return len;

}

struct reiserfs_xattr_handler trusted_handler = {

        .prefix = XATTR_TRUSTED_PREFIX,

        .get = trusted_get,

        .set = trusted_set,

        .del = trusted_del,

        .list = trusted_list,

};