[PATCH 3/7 v21] LSM: Remove a comment from security.h

Casey Schaufler
2015-03-10T01:20:44Z

Subject: [PATCH 3/7 v21] LSM: Remove a comment from security.h

Remove the large comment describing the content of the
security_operations structure from security.h. This
wasn't done in the previous (2/7) patch because it
would have exceeded the mail list size limits.

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>

---

include/linux/security.h | 1270 ----------------------------------------------
1 file changed, 1270 deletions(-)

diff --git a/include/linux/security.h b/include/linux/security.h
index f84ef88..884fe9f 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -186,1276 +186,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
opts->num_mnt_opts = 0;
}

-/**
- * 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.
- * @skb_owned_by:
- * This hook sets the packet's owning sock.
- * @skb is the packet.
- * @sk the sock which owns the packet.
- *
- * 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 <include/linux/capability.h>.
- * @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.
- */
-
/* prototypes */
extern int security_init(void);