root/fs/reiserfs/xattr_security.c

DEFINITIONS

1. security_get
2. security_set
3. security_del
4. security_list

#include <linux/reiserfs_fs.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>

static int
security_get(struct inode *inode, const char *name, void *buffer, size_t size)
{
        if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
                return -EINVAL;

        if (is_reiserfs_priv_object(inode))
                return -EPERM;

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

static int
security_set(struct inode *inode, const char *name, const void *buffer,
             size_t size, int flags)
{
        if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
                return -EINVAL;

        if (is_reiserfs_priv_object(inode))
                return -EPERM;

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

static int security_del(struct inode *inode, const char *name)
{
        if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
                return -EINVAL;

        if (is_reiserfs_priv_object(inode))
                return -EPERM;

        return 0;
}

static int
security_list(struct inode *inode, const char *name, int namelen, char *out)
{
        int len = namelen;

        if (is_reiserfs_priv_object(inode))
                return 0;

        if (out)
                memcpy(out, name, len);

        return len;
}

struct reiserfs_xattr_handler security_handler = {
        .prefix = XATTR_SECURITY_PREFIX,
        .get = security_get,
        .set = security_set,
        .del = security_del,
        .list = security_list,
};