Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751813AbbEGUmc (ORCPT ); Thu, 7 May 2015 16:42:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54073 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751061AbbEGUm1 (ORCPT ); Thu, 7 May 2015 16:42:27 -0400 From: Paul Moore To: Casey Schaufler Cc: James Morris , James Morris , LSM , LKLM , John Johansen , Tetsuo Handa , Stephen Smalley , Eric Paris , Kees Cook Subject: Re: [PATCH 2/7 v22] LSM: Add the comment to lsm_hooks.h Date: Thu, 07 May 2015 16:42:25 -0400 Message-ID: <7618499.hbcdxK971S@sifl> Organization: Red Hat User-Agent: KMail/4.14.6 (Linux/3.16.7-gentoo; KDE/4.14.7; x86_64; ; ) In-Reply-To: <55454B6D.4080806@schaufler-ca.com> References: <55454539.9020204@schaufler-ca.com> <55454B6D.4080806@schaufler-ca.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 64485 Lines: 1324 On Saturday, May 02, 2015 03:10:53 PM Casey Schaufler wrote: > Subject: [PATCH 2/7 v22] LSM: Add the comment to lsm_hooks.h > > Add the large comment describing the content of the > security_operations structure to lsm_hooks.h. This > wasn't done in the previous (1/7) patch because it > would have exceeded the mail list size limits. > > Signed-off-by: Casey Schaufler Acked-by: Paul Moore > diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h > index b2f447e..b798c07 100644 > --- a/include/linux/lsm_hooks.h > +++ b/include/linux/lsm_hooks.h > @@ -31,6 +31,1285 @@ > > #ifdef CONFIG_SECURITY > > +/** > + * struct security_operations - main security structure > + * > + * Security module identifier. > + * > + * @name: > + * A string that acts as a unique identifier for the LSM with max number > + * of characters = SECURITY_NAME_MAX. > + * > + * Security hooks for program execution operations. > + * > + * @bprm_set_creds: > + * Save security information in the bprm->security field, typically based > + * on information about the bprm->file, for later use by the apply_creds > + * hook. This hook may also optionally check permissions (e.g. for > + * transitions between security domains). > + * This hook may be called multiple times during a single execve, e.g. for > + * interpreters. The hook can tell whether it has already been called by > + * checking to see if @bprm->security is non-NULL. If so, then the hook > + * may decide either to retain the security information saved earlier or > + * to replace it. > + * @bprm contains the linux_binprm structure. > + * Return 0 if the hook is successful and permission is granted. > + * @bprm_check_security: > + * This hook mediates the point when a search for a binary handler will > + * begin. It allows a check the @bprm->security value which is set in the > + * preceding set_creds call. The primary difference from set_creds is > + * that the argv list and envp list are reliably available in @bprm. This > + * hook may be called multiple times during a single execve; and in each > + * pass set_creds is called first. > + * @bprm contains the linux_binprm structure. > + * Return 0 if the hook is successful and permission is granted. > + * @bprm_committing_creds: > + * Prepare to install the new security attributes of a process being > + * transformed by an execve operation, based on the old credentials > + * pointed to by @current->cred and the information set in @bprm->cred by > + * the bprm_set_creds hook. @bprm points to the linux_binprm structure. > + * This hook is a good place to perform state changes on the process such > + * as closing open file descriptors to which access will no longer be > + * granted when the attributes are changed. This is called immediately > + * before commit_creds(). > + * @bprm_committed_creds: > + * Tidy up after the installation of the new security attributes of a > + * process being transformed by an execve operation. The new credentials > + * have, by this point, been set to @current->cred. @bprm points to the > + * linux_binprm structure. This hook is a good place to perform state > + * changes on the process such as clearing out non-inheritable signal > + * state. This is called immediately after commit_creds(). > + * @bprm_secureexec: > + * Return a boolean value (0 or 1) indicating whether a "secure exec" > + * is required. The flag is passed in the auxiliary table > + * on the initial stack to the ELF interpreter to indicate whether libc > + * should enable secure mode. > + * @bprm contains the linux_binprm structure. > + * > + * Security hooks for filesystem operations. > + * > + * @sb_alloc_security: > + * Allocate and attach a security structure to the sb->s_security field. > + * The s_security field is initialized to NULL when the structure is > + * allocated. > + * @sb contains the super_block structure to be modified. > + * Return 0 if operation was successful. > + * @sb_free_security: > + * Deallocate and clear the sb->s_security field. > + * @sb contains the super_block structure to be modified. > + * @sb_statfs: > + * Check permission before obtaining filesystem statistics for the @mnt > + * mountpoint. > + * @dentry is a handle on the superblock for the filesystem. > + * Return 0 if permission is granted. > + * @sb_mount: > + * Check permission before an object specified by @dev_name is mounted on > + * the mount point named by @nd. For an ordinary mount, @dev_name > + * identifies a device if the file system type requires a device. For a > + * remount (@flags & MS_REMOUNT), @dev_name is irrelevant. For a > + * loopback/bind mount (@flags & MS_BIND), @dev_name identifies the > + * pathname of the object being mounted. > + * @dev_name contains the name for object being mounted. > + * @path contains the path for mount point object. > + * @type contains the filesystem type. > + * @flags contains the mount flags. > + * @data contains the filesystem-specific data. > + * Return 0 if permission is granted. > + * @sb_copy_data: > + * Allow mount option data to be copied prior to parsing by the filesystem, > + * so that the security module can extract security-specific mount + > * options cleanly (a filesystem may modify the data e.g. with strsep()). + > * This also allows the original mount data to be stripped of security- + > * specific options to avoid having to make filesystems aware of them. + > * @type the type of filesystem being mounted. > + * @orig the original mount data copied from userspace. > + * @copy copied data which will be passed to the security module. > + * Returns 0 if the copy was successful. > + * @sb_remount: > + * Extracts security system specific mount options and verifies no changes > + * are being made to those options. > + * @sb superblock being remounted > + * @data contains the filesystem-specific data. > + * Return 0 if permission is granted. > + * @sb_umount: > + * Check permission before the @mnt file system is unmounted. > + * @mnt contains the mounted file system. > + * @flags contains the unmount flags, e.g. MNT_FORCE. > + * Return 0 if permission is granted. > + * @sb_pivotroot: > + * Check permission before pivoting the root filesystem. > + * @old_path contains the path for the new location of the > + * current root (put_old). > + * @new_path contains the path for the new root (new_root). > + * Return 0 if permission is granted. > + * @sb_set_mnt_opts: > + * Set the security relevant mount options used for a superblock > + * @sb the superblock to set security mount options for > + * @opts binary data structure containing all lsm mount data > + * @sb_clone_mnt_opts: > + * Copy all security options from a given superblock to another > + * @oldsb old superblock which contain information to clone > + * @newsb new superblock which needs filled in > + * @sb_parse_opts_str: > + * Parse a string of security data filling in the opts structure > + * @options string containing all mount options known by the LSM > + * @opts binary data structure usable by the LSM > + * @dentry_init_security: > + * Compute a context for a dentry as the inode is not yet available > + * since NFSv4 has no label backed by an EA anyway. > + * @dentry dentry to use in calculating the context. > + * @mode mode used to determine resource type. > + * @name name of the last path component used to create file > + * @ctx pointer to place the pointer to the resulting context in. > + * @ctxlen point to place the length of the resulting context. > + * > + * > + * Security hooks for inode operations. > + * > + * @inode_alloc_security: > + * Allocate and attach a security structure to @inode->i_security. The > + * i_security field is initialized to NULL when the inode structure is > + * allocated. > + * @inode contains the inode structure. > + * Return 0 if operation was successful. > + * @inode_free_security: > + * @inode contains the inode structure. > + * Deallocate the inode security structure and set @inode->i_security to > + * NULL. > + * @inode_init_security: > + * Obtain the security attribute name suffix and value to set on a newly > + * created inode and set up the incore security field for the new inode. > + * This hook is called by the fs code as part of the inode creation > + * transaction and provides for atomic labeling of the inode, unlike > + * the post_create/mkdir/... hooks called by the VFS. The hook function > + * is expected to allocate the name and value via kmalloc, with the caller > + * being responsible for calling kfree after using them. > + * If the security module does not use security attributes or does > + * not wish to put a security attribute on this particular inode, > + * then it should return -EOPNOTSUPP to skip this processing. > + * @inode contains the inode structure of the newly created inode. > + * @dir contains the inode structure of the parent directory. > + * @qstr contains the last path component of the new object > + * @name will be set to the allocated name suffix (e.g. selinux). > + * @value will be set to the allocated attribute value. > + * @len will be set to the length of the value. > + * Returns 0 if @name and @value have been successfully set, > + * -EOPNOTSUPP if no security attribute is needed, or > + * -ENOMEM on memory allocation failure. > + * @inode_create: > + * Check permission to create a regular file. > + * @dir contains inode structure of the parent of the new file. > + * @dentry contains the dentry structure for the file to be created. > + * @mode contains the file mode of the file to be created. > + * Return 0 if permission is granted. > + * @inode_link: > + * Check permission before creating a new hard link to a file. > + * @old_dentry contains the dentry structure for an existing > + * link to the file. > + * @dir contains the inode structure of the parent directory > + * of the new link. > + * @new_dentry contains the dentry structure for the new link. > + * Return 0 if permission is granted. > + * @path_link: > + * Check permission before creating a new hard link to a file. > + * @old_dentry contains the dentry structure for an existing link > + * to the file. > + * @new_dir contains the path structure of the parent directory of > + * the new link. > + * @new_dentry contains the dentry structure for the new link. > + * Return 0 if permission is granted. > + * @inode_unlink: > + * Check the permission to remove a hard link to a file. > + * @dir contains the inode structure of parent directory of the file. > + * @dentry contains the dentry structure for file to be unlinked. > + * Return 0 if permission is granted. > + * @path_unlink: > + * Check the permission to remove a hard link to a file. > + * @dir contains the path structure of parent directory of the file. > + * @dentry contains the dentry structure for file to be unlinked. > + * Return 0 if permission is granted. > + * @inode_symlink: > + * Check the permission to create a symbolic link to a file. > + * @dir contains the inode structure of parent directory of > + * the symbolic link. > + * @dentry contains the dentry structure of the symbolic link. > + * @old_name contains the pathname of file. > + * Return 0 if permission is granted. > + * @path_symlink: > + * Check the permission to create a symbolic link to a file. > + * @dir contains the path structure of parent directory of > + * the symbolic link. > + * @dentry contains the dentry structure of the symbolic link. > + * @old_name contains the pathname of file. > + * Return 0 if permission is granted. > + * @inode_mkdir: > + * Check permissions to create a new directory in the existing directory > + * associated with inode structure @dir. > + * @dir contains the inode structure of parent of the directory > + * to be created. > + * @dentry contains the dentry structure of new directory. > + * @mode contains the mode of new directory. > + * Return 0 if permission is granted. > + * @path_mkdir: > + * Check permissions to create a new directory in the existing directory > + * associated with path structure @path. > + * @dir contains the path structure of parent of the directory > + * to be created. > + * @dentry contains the dentry structure of new directory. > + * @mode contains the mode of new directory. > + * Return 0 if permission is granted. > + * @inode_rmdir: > + * Check the permission to remove a directory. > + * @dir contains the inode structure of parent of the directory > + * to be removed. > + * @dentry contains the dentry structure of directory to be removed. > + * Return 0 if permission is granted. > + * @path_rmdir: > + * Check the permission to remove a directory. > + * @dir contains the path structure of parent of the directory to be > + * removed. > + * @dentry contains the dentry structure of directory to be removed. > + * Return 0 if permission is granted. > + * @inode_mknod: > + * Check permissions when creating a special file (or a socket or a fifo > + * file created via the mknod system call). Note that if mknod operation > + * is being done for a regular file, then the create hook will be called > + * and not this hook. > + * @dir contains the inode structure of parent of the new file. > + * @dentry contains the dentry structure of the new file. > + * @mode contains the mode of the new file. > + * @dev contains the device number. > + * Return 0 if permission is granted. > + * @path_mknod: > + * Check permissions when creating a file. Note that this hook is called > + * even if mknod operation is being done for a regular file. > + * @dir contains the path structure of parent of the new file. > + * @dentry contains the dentry structure of the new file. > + * @mode contains the mode of the new file. > + * @dev contains the undecoded device number. Use new_decode_dev() to get > + * the decoded device number. > + * Return 0 if permission is granted. > + * @inode_rename: > + * Check for permission to rename a file or directory. > + * @old_dir contains the inode structure for parent of the old link. > + * @old_dentry contains the dentry structure of the old link. > + * @new_dir contains the inode structure for parent of the new link. > + * @new_dentry contains the dentry structure of the new link. > + * Return 0 if permission is granted. > + * @path_rename: > + * Check for permission to rename a file or directory. > + * @old_dir contains the path structure for parent of the old link. > + * @old_dentry contains the dentry structure of the old link. > + * @new_dir contains the path structure for parent of the new link. > + * @new_dentry contains the dentry structure of the new link. > + * Return 0 if permission is granted. > + * @path_chmod: > + * Check for permission to change DAC's permission of a file or directory. > + * @dentry contains the dentry structure. > + * @mnt contains the vfsmnt structure. > + * @mode contains DAC's mode. > + * Return 0 if permission is granted. > + * @path_chown: > + * Check for permission to change owner/group of a file or directory. > + * @path contains the path structure. > + * @uid contains new owner's ID. > + * @gid contains new group's ID. > + * Return 0 if permission is granted. > + * @path_chroot: > + * Check for permission to change root directory. > + * @path contains the path structure. > + * Return 0 if permission is granted. > + * @inode_readlink: > + * Check the permission to read the symbolic link. > + * @dentry contains the dentry structure for the file link. > + * Return 0 if permission is granted. > + * @inode_follow_link: > + * Check permission to follow a symbolic link when looking up a pathname. > + * @dentry contains the dentry structure for the link. > + * @nd contains the nameidata structure for the parent directory. > + * Return 0 if permission is granted. > + * @inode_permission: > + * Check permission before accessing an inode. This hook is called by the > + * existing Linux permission function, so a security module can use it to > + * provide additional checking for existing Linux permission checks. > + * Notice that this hook is called when a file is opened (as well as many > + * other operations), whereas the file_security_ops permission hook is > + * called when the actual read/write operations are performed. > + * @inode contains the inode structure to check. > + * @mask contains the permission mask. > + * Return 0 if permission is granted. > + * @inode_setattr: > + * Check permission before setting file attributes. Note that the kernel > + * call to notify_change is performed from several locations, whenever > + * file attributes change (such as when a file is truncated, chown/chmod > + * operations, transferring disk quotas, etc). > + * @dentry contains the dentry structure for the file. > + * @attr is the iattr structure containing the new file attributes. > + * Return 0 if permission is granted. > + * @path_truncate: > + * Check permission before truncating a file. > + * @path contains the path structure for the file. > + * Return 0 if permission is granted. > + * @inode_getattr: > + * Check permission before obtaining file attributes. > + * @mnt is the vfsmount where the dentry was looked up > + * @dentry contains the dentry structure for the file. > + * Return 0 if permission is granted. > + * @inode_setxattr: > + * Check permission before setting the extended attributes > + * @value identified by @name for @dentry. > + * Return 0 if permission is granted. > + * @inode_post_setxattr: > + * Update inode security field after successful setxattr operation. > + * @value identified by @name for @dentry. > + * @inode_getxattr: > + * Check permission before obtaining the extended attributes > + * identified by @name for @dentry. > + * Return 0 if permission is granted. > + * @inode_listxattr: > + * Check permission before obtaining the list of extended attribute > + * names for @dentry. > + * Return 0 if permission is granted. > + * @inode_removexattr: > + * Check permission before removing the extended attribute > + * identified by @name for @dentry. > + * Return 0 if permission is granted. > + * @inode_getsecurity: > + * Retrieve a copy of the extended attribute representation of the > + * security label associated with @name for @inode via @buffer. Note that > + * @name is the remainder of the attribute name after the security prefix > + * has been removed. @alloc is used to specify of the call should return a > + * value via the buffer or just the value length Return size of buffer on > + * success. > + * @inode_setsecurity: > + * Set the security label associated with @name for @inode from the > + * extended attribute value @value. @size indicates the size of the > + * @value in bytes. @flags may be XATTR_CREATE, XATTR_REPLACE, or 0. > + * Note that @name is the remainder of the attribute name after the > + * security. prefix has been removed. > + * Return 0 on success. > + * @inode_listsecurity: > + * Copy the extended attribute names for the security labels > + * associated with @inode into @buffer. The maximum size of @buffer > + * is specified by @buffer_size. @buffer may be NULL to request > + * the size of the buffer required. > + * Returns number of bytes used/required on success. > + * @inode_need_killpriv: > + * Called when an inode has been changed. > + * @dentry is the dentry being changed. > + * Return <0 on error to abort the inode change operation. > + * Return 0 if inode_killpriv does not need to be called. > + * Return >0 if inode_killpriv does need to be called. > + * @inode_killpriv: > + * The setuid bit is being removed. Remove similar security labels. > + * Called with the dentry->d_inode->i_mutex held. > + * @dentry is the dentry being changed. > + * Return 0 on success. If error is returned, then the operation > + * causing setuid bit removal is failed. > + * @inode_getsecid: > + * Get the secid associated with the node. > + * @inode contains a pointer to the inode. > + * @secid contains a pointer to the location where result will be saved. > + * In case of failure, @secid will be set to zero. > + * > + * Security hooks for file operations > + * > + * @file_permission: > + * Check file permissions before accessing an open file. This hook is > + * called by various operations that read or write files. A security > + * module can use this hook to perform additional checking on these > + * operations, e.g. to revalidate permissions on use to support privilege > + * bracketing or policy changes. Notice that this hook is used when the > + * actual read/write operations are performed, whereas the > + * inode_security_ops hook is called when a file is opened (as well as > + * many other operations). > + * Caveat: Although this hook can be used to revalidate permissions for > + * various system call operations that read or write files, it does not > + * address the revalidation of permissions for memory-mapped files. > + * Security modules must handle this separately if they need such > + * revalidation. > + * @file contains the file structure being accessed. > + * @mask contains the requested permissions. > + * Return 0 if permission is granted. > + * @file_alloc_security: > + * Allocate and attach a security structure to the file->f_security field. > + * The security field is initialized to NULL when the structure is first > + * created. > + * @file contains the file structure to secure. > + * Return 0 if the hook is successful and permission is granted. > + * @file_free_security: > + * Deallocate and free any security structures stored in file->f_security. > + * @file contains the file structure being modified. > + * @file_ioctl: > + * @file contains the file structure. > + * @cmd contains the operation to perform. > + * @arg contains the operational arguments. > + * Check permission for an ioctl operation on @file. Note that @arg > + * sometimes represents a user space pointer; in other cases, it may be a > + * simple integer value. When @arg represents a user space pointer, it > + * should never be used by the security module. > + * Return 0 if permission is granted. > + * @mmap_addr : > + * Check permissions for a mmap operation at @addr. > + * @addr contains virtual address that will be used for the operation. > + * Return 0 if permission is granted. > + * @mmap_file : > + * Check permissions for a mmap operation. The @file may be NULL, e.g. > + * if mapping anonymous memory. > + * @file contains the file structure for file to map (may be NULL). > + * @reqprot contains the protection requested by the application. > + * @prot contains the protection that will be applied by the kernel. > + * @flags contains the operational flags. > + * Return 0 if permission is granted. > + * @file_mprotect: > + * Check permissions before changing memory access permissions. > + * @vma contains the memory region to modify. > + * @reqprot contains the protection requested by the application. > + * @prot contains the protection that will be applied by the kernel. > + * Return 0 if permission is granted. > + * @file_lock: > + * Check permission before performing file locking operations. > + * Note: this hook mediates both flock and fcntl style locks. > + * @file contains the file structure. > + * @cmd contains the posix-translated lock operation to perform > + * (e.g. F_RDLCK, F_WRLCK). > + * Return 0 if permission is granted. > + * @file_fcntl: > + * Check permission before allowing the file operation specified by @cmd > + * from being performed on the file @file. Note that @arg sometimes > + * represents a user space pointer; in other cases, it may be a simple > + * integer value. When @arg represents a user space pointer, it should > + * never be used by the security module. > + * @file contains the file structure. > + * @cmd contains the operation to be performed. > + * @arg contains the operational arguments. > + * Return 0 if permission is granted. > + * @file_set_fowner: > + * Save owner security information (typically from current->security) in > + * file->f_security for later use by the send_sigiotask hook. > + * @file contains the file structure to update. > + * Return 0 on success. > + * @file_send_sigiotask: > + * Check permission for the file owner @fown to send SIGIO or SIGURG to the > + * process @tsk. Note that this hook is sometimes called from interrupt. > + * Note that the fown_struct, @fown, is never outside the context of a + > * struct file, so the file structure (and associated security information) > + * can always be obtained: > + * container_of(fown, struct file, f_owner) > + * @tsk contains the structure of task receiving signal. > + * @fown contains the file owner information. > + * @sig is the signal that will be sent. When 0, kernel sends SIGIO. > + * Return 0 if permission is granted. > + * @file_receive: > + * This hook allows security modules to control the ability of a process > + * to receive an open file descriptor via socket IPC. > + * @file contains the file structure being received. > + * Return 0 if permission is granted. > + * @file_open > + * Save open-time permission checking state for later use upon > + * file_permission, and recheck access if anything has changed > + * since inode_permission. > + * > + * Security hooks for task operations. > + * > + * @task_create: > + * Check permission before creating a child process. See the clone(2) > + * manual page for definitions of the @clone_flags. > + * @clone_flags contains the flags indicating what should be shared. > + * Return 0 if permission is granted. > + * @task_free: > + * @task task being freed > + * Handle release of task-related resources. (Note that this can be called > + * from interrupt context.) > + * @cred_alloc_blank: > + * @cred points to the credentials. > + * @gfp indicates the atomicity of any memory allocations. > + * Only allocate sufficient memory and attach to @cred such that > + * cred_transfer() will not get ENOMEM. > + * @cred_free: > + * @cred points to the credentials. > + * Deallocate and clear the cred->security field in a set of credentials. > + * @cred_prepare: > + * @new points to the new credentials. > + * @old points to the original credentials. > + * @gfp indicates the atomicity of any memory allocations. > + * Prepare a new set of credentials by copying the data from the old set. > + * @cred_transfer: > + * @new points to the new credentials. > + * @old points to the original credentials. > + * Transfer data from original creds to new creds > + * @kernel_act_as: > + * Set the credentials for a kernel service to act as (subjective context). > + * @new points to the credentials to be modified. > + * @secid specifies the security ID to be set > + * The current task must be the one that nominated @secid. > + * Return 0 if successful. > + * @kernel_create_files_as: > + * Set the file creation context in a set of credentials to be the same as > + * the objective context of the specified inode. > + * @new points to the credentials to be modified. > + * @inode points to the inode to use as a reference. > + * The current task must be the one that nominated @inode. > + * Return 0 if successful. > + * @kernel_fw_from_file: > + * Load firmware from userspace (not called for built-in firmware). > + * @file contains the file structure pointing to the file containing > + * the firmware to load. This argument will be NULL if the firmware > + * was loaded via the uevent-triggered blob-based interface exposed > + * by CONFIG_FW_LOADER_USER_HELPER. > + * @buf pointer to buffer containing firmware contents. > + * @size length of the firmware contents. > + * Return 0 if permission is granted. > + * @kernel_module_request: > + * Ability to trigger the kernel to automatically upcall to userspace for > + * userspace to load a kernel module with the given name. > + * @kmod_name name of the module requested by the kernel > + * Return 0 if successful. > + * @kernel_module_from_file: > + * Load a kernel module from userspace. > + * @file contains the file structure pointing to the file containing > + * the kernel module to load. If the module is being loaded from a blob, > + * this argument will be NULL. > + * Return 0 if permission is granted. > + * @task_fix_setuid: > + * Update the module's state after setting one or more of the user > + * identity attributes of the current process. The @flags parameter > + * indicates which of the set*uid system calls invoked this hook. If > + * @new is the set of credentials that will be installed. Modifications > + * should be made to this rather than to @current->cred. > + * @old is the set of credentials that are being replaces > + * @flags contains one of the LSM_SETID_* values. > + * Return 0 on success. > + * @task_setpgid: > + * Check permission before setting the process group identifier of the > + * process @p to @pgid. > + * @p contains the task_struct for process being modified. > + * @pgid contains the new pgid. > + * Return 0 if permission is granted. > + * @task_getpgid: > + * Check permission before getting the process group identifier of the > + * process @p. > + * @p contains the task_struct for the process. > + * Return 0 if permission is granted. > + * @task_getsid: > + * Check permission before getting the session identifier of the process > + * @p. > + * @p contains the task_struct for the process. > + * Return 0 if permission is granted. > + * @task_getsecid: > + * Retrieve the security identifier of the process @p. > + * @p contains the task_struct for the process and place is into @secid. > + * In case of failure, @secid will be set to zero. > + * > + * @task_setnice: > + * Check permission before setting the nice value of @p to @nice. > + * @p contains the task_struct of process. > + * @nice contains the new nice value. > + * Return 0 if permission is granted. > + * @task_setioprio > + * Check permission before setting the ioprio value of @p to @ioprio. > + * @p contains the task_struct of process. > + * @ioprio contains the new ioprio value > + * Return 0 if permission is granted. > + * @task_getioprio > + * Check permission before getting the ioprio value of @p. > + * @p contains the task_struct of process. > + * Return 0 if permission is granted. > + * @task_setrlimit: > + * Check permission before setting the resource limits of the current > + * process for @resource to @new_rlim. The old resource limit values can > + * be examined by dereferencing (current->signal->rlim + resource). > + * @resource contains the resource whose limit is being set. > + * @new_rlim contains the new limits for @resource. > + * Return 0 if permission is granted. > + * @task_setscheduler: > + * Check permission before setting scheduling policy and/or parameters of > + * process @p based on @policy and @lp. > + * @p contains the task_struct for process. > + * @policy contains the scheduling policy. > + * @lp contains the scheduling parameters. > + * Return 0 if permission is granted. > + * @task_getscheduler: > + * Check permission before obtaining scheduling information for process > + * @p. > + * @p contains the task_struct for process. > + * Return 0 if permission is granted. > + * @task_movememory > + * Check permission before moving memory owned by process @p. > + * @p contains the task_struct for process. > + * Return 0 if permission is granted. > + * @task_kill: > + * Check permission before sending signal @sig to @p. @info can be NULL, > + * the constant 1, or a pointer to a siginfo structure. If @info is 1 or > + * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming > + * from the kernel and should typically be permitted. > + * SIGIO signals are handled separately by the send_sigiotask hook in > + * file_security_ops. > + * @p contains the task_struct for process. > + * @info contains the signal information. > + * @sig contains the signal value. > + * @secid contains the sid of the process where the signal originated > + * Return 0 if permission is granted. > + * @task_wait: > + * Check permission before allowing a process to reap a child process @p > + * and collect its status information. > + * @p contains the task_struct for process. > + * Return 0 if permission is granted. > + * @task_prctl: > + * Check permission before performing a process control operation on the > + * current process. > + * @option contains the operation. > + * @arg2 contains a argument. > + * @arg3 contains a argument. > + * @arg4 contains a argument. > + * @arg5 contains a argument. > + * Return -ENOSYS if no-one wanted to handle this op, any other value to > + * cause prctl() to return immediately with that value. > + * @task_to_inode: > + * Set the security attributes for an inode based on an associated task's > + * security attributes, e.g. for /proc/pid inodes. > + * @p contains the task_struct for the task. > + * @inode contains the inode structure for the inode. > + * > + * Security hooks for Netlink messaging. > + * > + * @netlink_send: > + * Save security information for a netlink message so that permission > + * checking can be performed when the message is processed. The security > + * information can be saved using the eff_cap field of the > + * netlink_skb_parms structure. Also may be used to provide fine > + * grained control over message transmission. > + * @sk associated sock of task sending the message. > + * @skb contains the sk_buff structure for the netlink message. > + * Return 0 if the information was successfully saved and message > + * is allowed to be transmitted. > + * > + * Security hooks for Unix domain networking. > + * > + * @unix_stream_connect: > + * Check permissions before establishing a Unix domain stream connection > + * between @sock and @other. > + * @sock contains the sock structure. > + * @other contains the peer sock structure. > + * @newsk contains the new sock structure. > + * Return 0 if permission is granted. > + * @unix_may_send: > + * Check permissions before connecting or sending datagrams from @sock to > + * @other. > + * @sock contains the socket structure. > + * @other contains the peer socket structure. > + * Return 0 if permission is granted. > + * > + * The @unix_stream_connect and @unix_may_send hooks were necessary because > + * Linux provides an alternative to the conventional file name space for > Unix + * domain sockets. Whereas binding and connecting to sockets in the > file name + * space is mediated by the typical file permissions (and caught > by the mknod + * and permission hooks in inode_security_ops), binding and > connecting to + * sockets in the abstract name space is completely > unmediated. Sufficient + * control of Unix domain sockets in the abstract > name space isn't possible + * using only the socket layer hooks, since we > need to know the actual target + * socket, which is not looked up until we > are inside the af_unix code. + * > + * Security hooks for socket operations. > + * > + * @socket_create: > + * Check permissions prior to creating a new socket. > + * @family contains the requested protocol family. > + * @type contains the requested communications type. > + * @protocol contains the requested protocol. > + * @kern set to 1 if a kernel socket. > + * Return 0 if permission is granted. > + * @socket_post_create: > + * This hook allows a module to update or allocate a per-socket security > + * structure. Note that the security field was not added directly to the > + * socket structure, but rather, the socket security information is stored > + * in the associated inode. Typically, the inode alloc_security hook will > + * allocate and and attach security information to > + * sock->inode->i_security. This hook may be used to update the > + * sock->inode->i_security field with additional information that wasn't > + * available when the inode was allocated. > + * @sock contains the newly created socket structure. > + * @family contains the requested protocol family. > + * @type contains the requested communications type. > + * @protocol contains the requested protocol. > + * @kern set to 1 if a kernel socket. > + * @socket_bind: > + * Check permission before socket protocol layer bind operation is > + * performed and the socket @sock is bound to the address specified in the > + * @address parameter. > + * @sock contains the socket structure. > + * @address contains the address to bind to. > + * @addrlen contains the length of address. > + * Return 0 if permission is granted. > + * @socket_connect: > + * Check permission before socket protocol layer connect operation > + * attempts to connect socket @sock to a remote address, @address. > + * @sock contains the socket structure. > + * @address contains the address of remote endpoint. > + * @addrlen contains the length of address. > + * Return 0 if permission is granted. > + * @socket_listen: > + * Check permission before socket protocol layer listen operation. > + * @sock contains the socket structure. > + * @backlog contains the maximum length for the pending connection queue. > + * Return 0 if permission is granted. > + * @socket_accept: > + * Check permission before accepting a new connection. Note that the new > + * socket, @newsock, has been created and some information copied to it, > + * but the accept operation has not actually been performed. > + * @sock contains the listening socket structure. > + * @newsock contains the newly created server socket for connection. > + * Return 0 if permission is granted. > + * @socket_sendmsg: > + * Check permission before transmitting a message to another socket. > + * @sock contains the socket structure. > + * @msg contains the message to be transmitted. > + * @size contains the size of message. > + * Return 0 if permission is granted. > + * @socket_recvmsg: > + * Check permission before receiving a message from a socket. > + * @sock contains the socket structure. > + * @msg contains the message structure. > + * @size contains the size of message structure. > + * @flags contains the operational flags. > + * Return 0 if permission is granted. > + * @socket_getsockname: > + * Check permission before the local address (name) of the socket object > + * @sock is retrieved. > + * @sock contains the socket structure. > + * Return 0 if permission is granted. > + * @socket_getpeername: > + * Check permission before the remote address (name) of a socket object > + * @sock is retrieved. > + * @sock contains the socket structure. > + * Return 0 if permission is granted. > + * @socket_getsockopt: > + * Check permissions before retrieving the options associated with socket > + * @sock. > + * @sock contains the socket structure. > + * @level contains the protocol level to retrieve option from. > + * @optname contains the name of option to retrieve. > + * Return 0 if permission is granted. > + * @socket_setsockopt: > + * Check permissions before setting the options associated with socket > + * @sock. > + * @sock contains the socket structure. > + * @level contains the protocol level to set options for. > + * @optname contains the name of the option to set. > + * Return 0 if permission is granted. > + * @socket_shutdown: > + * Checks permission before all or part of a connection on the socket > + * @sock is shut down. > + * @sock contains the socket structure. > + * @how contains the flag indicating how future sends and receives > + * are handled. > + * Return 0 if permission is granted. > + * @socket_sock_rcv_skb: > + * Check permissions on incoming network packets. This hook is distinct > + * from Netfilter's IP input hooks since it is the first time that the > + * incoming sk_buff @skb has been associated with a particular socket, @sk. > + * Must not sleep inside this hook because some callers hold spinlocks. + > * @sk contains the sock (not socket) associated with the incoming sk_buff. > + * @skb contains the incoming network data. > + * @socket_getpeersec_stream: > + * This hook allows the security module to provide peer socket security > + * state for unix or connected tcp sockets to userspace via getsockopt > + * SO_GETPEERSEC. For tcp sockets this can be meaningful if the > + * socket is associated with an ipsec SA. > + * @sock is the local socket. > + * @optval userspace memory where the security state is to be copied. > + * @optlen userspace int where the module should copy the actual length > + * of the security state. > + * @len as input is the maximum length to copy to userspace provided > + * by the caller. > + * Return 0 if all is well, otherwise, typical getsockopt return > + * values. > + * @socket_getpeersec_dgram: > + * This hook allows the security module to provide peer socket security > + * state for udp sockets on a per-packet basis to userspace via > + * getsockopt SO_GETPEERSEC. The application must first have indicated > + * the IP_PASSSEC option via getsockopt. It can then retrieve the > + * security state returned by this hook for a packet via the SCM_SECURITY > + * ancillary message type. > + * @skb is the skbuff for the packet being queried > + * @secdata is a pointer to a buffer in which to copy the security data > + * @seclen is the maximum length for @secdata > + * Return 0 on success, error on failure. > + * @sk_alloc_security: > + * Allocate and attach a security structure to the sk->sk_security field, > + * which is used to copy security attributes between local stream sockets. > + * @sk_free_security: > + * Deallocate security structure. > + * @sk_clone_security: > + * Clone/copy security structure. > + * @sk_getsecid: > + * Retrieve the LSM-specific secid for the sock to enable caching > + * of network authorizations. > + * @sock_graft: > + * Sets the socket's isec sid to the sock's sid. > + * @inet_conn_request: > + * Sets the openreq's sid to socket's sid with MLS portion taken > + * from peer sid. > + * @inet_csk_clone: > + * Sets the new child socket's sid to the openreq sid. > + * @inet_conn_established: > + * Sets the connection's peersid to the secmark on skb. > + * @secmark_relabel_packet: > + * check if the process should be allowed to relabel packets to > + * the given secid > + * @security_secmark_refcount_inc > + * tells the LSM to increment the number of secmark labeling rules loaded > + * @security_secmark_refcount_dec > + * tells the LSM to decrement the number of secmark labeling rules loaded > + * @req_classify_flow: > + * Sets the flow's sid to the openreq sid. > + * @tun_dev_alloc_security: > + * This hook allows a module to allocate a security structure for a TUN > + * device. > + * @security pointer to a security structure pointer. > + * Returns a zero on success, negative values on failure. > + * @tun_dev_free_security: > + * This hook allows a module to free the security structure for a TUN > + * device. > + * @security pointer to the TUN device's security structure > + * @tun_dev_create: > + * Check permissions prior to creating a new TUN device. > + * @tun_dev_attach_queue: > + * Check permissions prior to attaching to a TUN device queue. > + * @security pointer to the TUN device's security structure. > + * @tun_dev_attach: > + * This hook can be used by the module to update any security state > + * associated with the TUN device's sock structure. > + * @sk contains the existing sock structure. > + * @security pointer to the TUN device's security structure. > + * @tun_dev_open: > + * This hook can be used by the module to update any security state > + * associated with the TUN device's security structure. > + * @security pointer to the TUN devices's security structure. > + * > + * Security hooks for XFRM operations. > + * > + * @xfrm_policy_alloc_security: > + * @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy > + * Database used by the XFRM system. > + * @sec_ctx contains the security context information being provided by > + * the user-level policy update program (e.g., setkey). > + * Allocate a security structure to the xp->security field; the security > + * field is initialized to NULL when the xfrm_policy is allocated. > + * Return 0 if operation was successful (memory to allocate, legal context) > + * @gfp is to specify the context for the allocation > + * @xfrm_policy_clone_security: > + * @old_ctx contains an existing xfrm_sec_ctx. > + * @new_ctxp contains a new xfrm_sec_ctx being cloned from old. > + * Allocate a security structure in new_ctxp that contains the > + * information from the old_ctx structure. > + * Return 0 if operation was successful (memory to allocate). > + * @xfrm_policy_free_security: > + * @ctx contains the xfrm_sec_ctx > + * Deallocate xp->security. > + * @xfrm_policy_delete_security: > + * @ctx contains the xfrm_sec_ctx. > + * Authorize deletion of xp->security. > + * @xfrm_state_alloc: > + * @x contains the xfrm_state being added to the Security Association > + * Database by the XFRM system. > + * @sec_ctx contains the security context information being provided by > + * the user-level SA generation program (e.g., setkey or racoon). > + * Allocate a security structure to the x->security field; the security > + * field is initialized to NULL when the xfrm_state is allocated. Set the > + * context to correspond to sec_ctx. Return 0 if operation was successful > + * (memory to allocate, legal context). > + * @xfrm_state_alloc_acquire: > + * @x contains the xfrm_state being added to the Security Association > + * Database by the XFRM system. > + * @polsec contains the policy's security context. > + * @secid contains the secid from which to take the mls portion of the > + * context. > + * Allocate a security structure to the x->security field; the security > + * field is initialized to NULL when the xfrm_state is allocated. Set the > + * context to correspond to secid. Return 0 if operation was successful > + * (memory to allocate, legal context). > + * @xfrm_state_free_security: > + * @x contains the xfrm_state. > + * Deallocate x->security. > + * @xfrm_state_delete_security: > + * @x contains the xfrm_state. > + * Authorize deletion of x->security. > + * @xfrm_policy_lookup: > + * @ctx contains the xfrm_sec_ctx for which the access control is being > + * checked. > + * @fl_secid contains the flow security label that is used to authorize > + * access to the policy xp. > + * @dir contains the direction of the flow (input or output). > + * Check permission when a flow selects a xfrm_policy for processing > + * XFRMs on a packet. The hook is called when selecting either a > + * per-socket policy or a generic xfrm policy. > + * Return 0 if permission is granted, -ESRCH otherwise, or -errno > + * on other errors. > + * @xfrm_state_pol_flow_match: > + * @x contains the state to match. > + * @xp contains the policy to check for a match. > + * @fl contains the flow to check for a match. > + * Return 1 if there is a match. > + * @xfrm_decode_session: > + * @skb points to skb to decode. > + * @secid points to the flow key secid to set. > + * @ckall says if all xfrms used should be checked for same secid. > + * Return 0 if ckall is zero or all xfrms used have the same secid. > + * > + * Security hooks affecting all Key Management operations > + * > + * @key_alloc: > + * Permit allocation of a key and assign security data. Note that key does > + * not have a serial number assigned at this point. > + * @key points to the key. > + * @flags is the allocation flags > + * Return 0 if permission is granted, -ve error otherwise. > + * @key_free: > + * Notification of destruction; free security data. > + * @key points to the key. > + * No return value. > + * @key_permission: > + * See whether a specific operational right is granted to a process on a > + * key. > + * @key_ref refers to the key (key pointer + possession attribute bit). > + * @cred points to the credentials to provide the context against which to > + * evaluate the security data on the key. > + * @perm describes the combination of permissions required of this key. > + * Return 0 if permission is granted, -ve error otherwise. > + * @key_getsecurity: > + * Get a textual representation of the security context attached to a key > + * for the purposes of honouring KEYCTL_GETSECURITY. This function > + * allocates the storage for the NUL-terminated string and the caller > + * should free it. > + * @key points to the key to be queried. > + * @_buffer points to a pointer that should be set to point to the > + * resulting string (if no label or an error occurs). > + * Return the length of the string (including terminating NUL) or -ve if > + * an error. > + * May also return 0 (and a NULL buffer pointer) if there is no label. > + * > + * Security hooks affecting all System V IPC operations. > + * > + * @ipc_permission: > + * Check permissions for access to IPC > + * @ipcp contains the kernel IPC permission structure > + * @flag contains the desired (requested) permission set > + * Return 0 if permission is granted. > + * @ipc_getsecid: > + * Get the secid associated with the ipc object. > + * @ipcp contains the kernel IPC permission structure. > + * @secid contains a pointer to the location where result will be saved. > + * In case of failure, @secid will be set to zero. > + * > + * Security hooks for individual messages held in System V IPC message > queues + * @msg_msg_alloc_security: > + * Allocate and attach a security structure to the msg->security field. > + * The security field is initialized to NULL when the structure is first > + * created. > + * @msg contains the message structure to be modified. > + * Return 0 if operation was successful and permission is granted. > + * @msg_msg_free_security: > + * Deallocate the security structure for this message. > + * @msg contains the message structure to be modified. > + * > + * Security hooks for System V IPC Message Queues > + * > + * @msg_queue_alloc_security: > + * Allocate and attach a security structure to the > + * msq->q_perm.security field. The security field is initialized to > + * NULL when the structure is first created. > + * @msq contains the message queue structure to be modified. > + * Return 0 if operation was successful and permission is granted. > + * @msg_queue_free_security: > + * Deallocate security structure for this message queue. > + * @msq contains the message queue structure to be modified. > + * @msg_queue_associate: > + * Check permission when a message queue is requested through the > + * msgget system call. This hook is only called when returning the > + * message queue identifier for an existing message queue, not when a > + * new message queue is created. > + * @msq contains the message queue to act upon. > + * @msqflg contains the operation control flags. > + * Return 0 if permission is granted. > + * @msg_queue_msgctl: > + * Check permission when a message control operation specified by @cmd > + * is to be performed on the message queue @msq. > + * The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO. > + * @msq contains the message queue to act upon. May be NULL. > + * @cmd contains the operation to be performed. > + * Return 0 if permission is granted. > + * @msg_queue_msgsnd: > + * Check permission before a message, @msg, is enqueued on the message > + * queue, @msq. > + * @msq contains the message queue to send message to. > + * @msg contains the message to be enqueued. > + * @msqflg contains operational flags. > + * Return 0 if permission is granted. > + * @msg_queue_msgrcv: > + * Check permission before a message, @msg, is removed from the message > + * queue, @msq. The @target task structure contains a pointer to the > + * process that will be receiving the message (not equal to the current > + * process when inline receives are being performed). > + * @msq contains the message queue to retrieve message from. > + * @msg contains the message destination. > + * @target contains the task structure for recipient process. > + * @type contains the type of message requested. > + * @mode contains the operational flags. > + * Return 0 if permission is granted. > + * > + * Security hooks for System V Shared Memory Segments > + * > + * @shm_alloc_security: > + * Allocate and attach a security structure to the shp->shm_perm.security > + * field. The security field is initialized to NULL when the structure is > + * first created. > + * @shp contains the shared memory structure to be modified. > + * Return 0 if operation was successful and permission is granted. > + * @shm_free_security: > + * Deallocate the security struct for this memory segment. > + * @shp contains the shared memory structure to be modified. > + * @shm_associate: > + * Check permission when a shared memory region is requested through the > + * shmget system call. This hook is only called when returning the shared > + * memory region identifier for an existing region, not when a new shared > + * memory region is created. > + * @shp contains the shared memory structure to be modified. > + * @shmflg contains the operation control flags. > + * Return 0 if permission is granted. > + * @shm_shmctl: > + * Check permission when a shared memory control operation specified by > + * @cmd is to be performed on the shared memory region @shp. > + * The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO. > + * @shp contains shared memory structure to be modified. > + * @cmd contains the operation to be performed. > + * Return 0 if permission is granted. > + * @shm_shmat: > + * Check permissions prior to allowing the shmat system call to attach the > + * shared memory segment @shp to the data segment of the calling process. > + * The attaching address is specified by @shmaddr. > + * @shp contains the shared memory structure to be modified. > + * @shmaddr contains the address to attach memory region to. > + * @shmflg contains the operational flags. > + * Return 0 if permission is granted. > + * > + * Security hooks for System V Semaphores > + * > + * @sem_alloc_security: > + * Allocate and attach a security structure to the sma->sem_perm.security > + * field. The security field is initialized to NULL when the structure is > + * first created. > + * @sma contains the semaphore structure > + * Return 0 if operation was successful and permission is granted. > + * @sem_free_security: > + * deallocate security struct for this semaphore > + * @sma contains the semaphore structure. > + * @sem_associate: > + * Check permission when a semaphore is requested through the semget > + * system call. This hook is only called when returning the semaphore > + * identifier for an existing semaphore, not when a new one must be > + * created. > + * @sma contains the semaphore structure. > + * @semflg contains the operation control flags. > + * Return 0 if permission is granted. > + * @sem_semctl: > + * Check permission when a semaphore operation specified by @cmd is to be > + * performed on the semaphore @sma. The @sma may be NULL, e.g. for > + * IPC_INFO or SEM_INFO. > + * @sma contains the semaphore structure. May be NULL. > + * @cmd contains the operation to be performed. > + * Return 0 if permission is granted. > + * @sem_semop > + * Check permissions before performing operations on members of the > + * semaphore set @sma. If the @alter flag is nonzero, the semaphore set > + * may be modified. > + * @sma contains the semaphore structure. > + * @sops contains the operations to perform. > + * @nsops contains the number of operations to perform. > + * @alter contains the flag indicating whether changes are to be made. > + * Return 0 if permission is granted. > + * > + * @binder_set_context_mgr > + * Check whether @mgr is allowed to be the binder context manager. > + * @mgr contains the task_struct for the task being registered. > + * Return 0 if permission is granted. > + * @binder_transaction > + * Check whether @from is allowed to invoke a binder transaction call > + * to @to. > + * @from contains the task_struct for the sending task. > + * @to contains the task_struct for the receiving task. > + * @binder_transfer_binder > + * Check whether @from is allowed to transfer a binder reference to @to. > + * @from contains the task_struct for the sending task. > + * @to contains the task_struct for the receiving task. > + * @binder_transfer_file > + * Check whether @from is allowed to transfer @file to @to. > + * @from contains the task_struct for the sending task. > + * @file contains the struct file being transferred. > + * @to contains the task_struct for the receiving task. > + * > + * @ptrace_access_check: > + * Check permission before allowing the current process to trace the > + * @child process. > + * Security modules may also want to perform a process tracing check > + * during an execve in the set_security or apply_creds hooks of > + * tracing check during an execve in the bprm_set_creds hook of > + * binprm_security_ops if the process is being traced and its security > + * attributes would be changed by the execve. > + * @child contains the task_struct structure for the target process. > + * @mode contains the PTRACE_MODE flags indicating the form of access. > + * Return 0 if permission is granted. > + * @ptrace_traceme: > + * Check that the @parent process has sufficient permission to trace the > + * current process before allowing the current process to present itself > + * to the @parent process for tracing. > + * @parent contains the task_struct structure for debugger process. > + * Return 0 if permission is granted. > + * @capget: > + * Get the @effective, @inheritable, and @permitted capability sets for > + * the @target process. The hook may also perform permission checking to > + * determine if the current process is allowed to see the capability sets > + * of the @target process. > + * @target contains the task_struct structure for target process. > + * @effective contains the effective capability set. > + * @inheritable contains the inheritable capability set. > + * @permitted contains the permitted capability set. > + * Return 0 if the capability sets were successfully obtained. > + * @capset: > + * Set the @effective, @inheritable, and @permitted capability sets for > + * the current process. > + * @new contains the new credentials structure for target process. > + * @old contains the current credentials structure for target process. > + * @effective contains the effective capability set. > + * @inheritable contains the inheritable capability set. > + * @permitted contains the permitted capability set. > + * Return 0 and update @new if permission is granted. > + * @capable: > + * Check whether the @tsk process has the @cap capability in the indicated > + * credentials. > + * @cred contains the credentials to use. > + * @ns contains the user namespace we want the capability in > + * @cap contains the capability . > + * @audit: Whether to write an audit message or not > + * Return 0 if the capability is granted for @tsk. > + * @syslog: > + * Check permission before accessing the kernel message ring or changing > + * logging to the console. > + * See the syslog(2) manual page for an explanation of the @type values. > + * @type contains the type of action. > + * @from_file indicates the context of action (if it came from /proc). > + * Return 0 if permission is granted. > + * @settime: > + * Check permission to change the system time. > + * struct timespec and timezone are defined in include/linux/time.h > + * @ts contains new time > + * @tz contains new timezone > + * Return 0 if permission is granted. > + * @vm_enough_memory: > + * Check permissions for allocating a new virtual mapping. > + * @mm contains the mm struct it is being added to. > + * @pages contains the number of pages. > + * Return 0 if permission is granted. > + * > + * @ismaclabel: > + * Check if the extended attribute specified by @name > + * represents a MAC label. Returns 1 if name is a MAC > + * attribute otherwise returns 0. > + * @name full extended attribute name to check against > + * LSM as a MAC label. > + * > + * @secid_to_secctx: > + * Convert secid to security context. If secdata is NULL the length of > + * the result will be returned in seclen, but no secdata will be returned. > + * This does mean that the length could change between calls to check the > + * length and the next call which actually allocates and returns the > + * secdata. > + * @secid contains the security ID. > + * @secdata contains the pointer that stores the converted security > + * context. > + * @seclen pointer which contains the length of the data > + * @secctx_to_secid: > + * Convert security context to secid. > + * @secid contains the pointer to the generated security ID. > + * @secdata contains the security context. > + * > + * @release_secctx: > + * Release the security context. > + * @secdata contains the security context. > + * @seclen contains the length of the security context. > + * > + * Security hooks for Audit > + * > + * @audit_rule_init: > + * Allocate and initialize an LSM audit rule structure. > + * @field contains the required Audit action. > + * Fields flags are defined in include/linux/audit.h > + * @op contains the operator the rule uses. > + * @rulestr contains the context where the rule will be applied to. > + * @lsmrule contains a pointer to receive the result. > + * Return 0 if @lsmrule has been successfully set, > + * -EINVAL in case of an invalid rule. > + * > + * @audit_rule_known: > + * Specifies whether given @rule contains any fields related to > + * current LSM. > + * @rule contains the audit rule of interest. > + * Return 1 in case of relation found, 0 otherwise. > + * > + * @audit_rule_match: > + * Determine if given @secid matches a rule previously approved > + * by @audit_rule_known. > + * @secid contains the security id in question. > + * @field contains the field which relates to current LSM. > + * @op contains the operator that will be used for matching. > + * @rule points to the audit rule that will be checked against. > + * @actx points to the audit context associated with the check. > + * Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure. > + * > + * @audit_rule_free: > + * Deallocate the LSM audit rule structure previously allocated by > + * audit_rule_init. > + * @rule contains the allocated rule > + * > + * @inode_notifysecctx: > + * Notify the security module of what the security context of an inode > + * should be. Initializes the incore security context managed by the > + * security module for this inode. Example usage: NFS client invokes > + * this hook to initialize the security context in its incore inode to the > + * value provided by the server for the file when the server returned the > + * file's attributes to the client. > + * > + * Must be called with inode->i_mutex locked. > + * > + * @inode we wish to set the security context of. > + * @ctx contains the string which we wish to set in the inode. > + * @ctxlen contains the length of @ctx. > + * > + * @inode_setsecctx: > + * Change the security context of an inode. Updates the > + * incore security context managed by the security module and invokes the > + * fs code as needed (via __vfs_setxattr_noperm) to update any backing > + * xattrs that represent the context. Example usage: NFS server invokes > + * this hook to change the security context in its incore inode and on the > + * backing filesystem to a value provided by the client on a SETATTR > + * operation. > + * > + * Must be called with inode->i_mutex locked. > + * > + * @dentry contains the inode we wish to set the security context of. > + * @ctx contains the string which we wish to set in the inode. > + * @ctxlen contains the length of @ctx. > + * > + * @inode_getsecctx: > + * On success, returns 0 and fills out @ctx and @ctxlen with the security > + * context for the given @inode. > + * > + * @inode we wish to get the security context of. > + * @ctx is a pointer in which to place the allocated security context. > + * @ctxlen points to the place to put the length of @ctx. > + * This is the main security structure. > + */ > + > struct security_operations { > char name[SECURITY_NAME_MAX + 1]; > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- paul moore security @ redhat -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/