#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> 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, };