security.h 109.1 KB
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/*
 * Linux Security plug
 *
 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
 * Copyright (C) 2001 James Morris <jmorris@intercode.com.au>
 * Copyright (C) 2001 Silicon Graphics, Inc. (Trust Technology Group)
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	Due to this file being licensed under the GPL there is controversy over
 *	whether this permits you to write a module that #includes this file
 *	without placing your module under the GPL.  Please consult a lawyer for
 *	advice before doing this.
 *
 */

#ifndef __LINUX_SECURITY_H
#define __LINUX_SECURITY_H

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#include <linux/key.h>
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#include <linux/capability.h>
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#include <linux/slab.h>
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#include <linux/err.h>

struct linux_binprm;
struct cred;
struct rlimit;
struct siginfo;
struct sem_array;
struct sembuf;
struct kern_ipc_perm;
struct audit_context;
struct super_block;
struct inode;
struct dentry;
struct file;
struct vfsmount;
struct path;
struct qstr;
struct nameidata;
struct iattr;
struct fown_struct;
struct file_operations;
struct shmid_kernel;
struct msg_msg;
struct msg_queue;
struct xattr;
struct xfrm_sec_ctx;
struct mm_struct;
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/* Maximum number of letters for an LSM name string */
#define SECURITY_NAME_MAX	10

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/* If capable should audit the security request */
#define SECURITY_CAP_NOAUDIT 0
#define SECURITY_CAP_AUDIT 1

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struct ctl_table;
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struct audit_krule;
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struct user_namespace;
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struct timezone;
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/*
 * These functions are in security/capability.c and are used
 * as the default capabilities functions
 */
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extern int cap_capable(const struct cred *cred, struct user_namespace *ns,
		       int cap, int audit);
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extern int cap_settime(const struct timespec *ts, const struct timezone *tz);
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extern int cap_ptrace_access_check(struct task_struct *child, unsigned int mode);
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extern int cap_ptrace_traceme(struct task_struct *parent);
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extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
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extern int cap_capset(struct cred *new, const struct cred *old,
		      const kernel_cap_t *effective,
		      const kernel_cap_t *inheritable,
		      const kernel_cap_t *permitted);
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extern int cap_bprm_set_creds(struct linux_binprm *bprm);
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extern int cap_bprm_secureexec(struct linux_binprm *bprm);
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extern int cap_inode_setxattr(struct dentry *dentry, const char *name,
			      const void *value, size_t size, int flags);
extern int cap_inode_removexattr(struct dentry *dentry, const char *name);
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extern int cap_inode_need_killpriv(struct dentry *dentry);
extern int cap_inode_killpriv(struct dentry *dentry);
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extern int cap_mmap_addr(unsigned long addr);
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extern int cap_mmap_file(struct file *file, unsigned long reqprot,
			 unsigned long prot, unsigned long flags);
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extern int cap_task_fix_setuid(struct cred *new, const struct cred *old, int flags);
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extern int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
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			  unsigned long arg4, unsigned long arg5);
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extern int cap_task_setscheduler(struct task_struct *p);
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extern int cap_task_setioprio(struct task_struct *p, int ioprio);
extern int cap_task_setnice(struct task_struct *p, int nice);
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extern int cap_vm_enough_memory(struct mm_struct *mm, long pages);
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struct msghdr;
struct sk_buff;
struct sock;
struct sockaddr;
struct socket;
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struct flowi;
struct dst_entry;
struct xfrm_selector;
struct xfrm_policy;
struct xfrm_state;
struct xfrm_user_sec_ctx;
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struct seq_file;
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extern int cap_netlink_send(struct sock *sk, struct sk_buff *skb);

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void reset_security_ops(void);

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#ifdef CONFIG_MMU
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extern unsigned long mmap_min_addr;
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extern unsigned long dac_mmap_min_addr;
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#else
#define dac_mmap_min_addr	0UL
#endif

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/*
 * Values used in the task_security_ops calls
 */
/* setuid or setgid, id0 == uid or gid */
#define LSM_SETID_ID	1

/* setreuid or setregid, id0 == real, id1 == eff */
#define LSM_SETID_RE	2

/* setresuid or setresgid, id0 == real, id1 == eff, uid2 == saved */
#define LSM_SETID_RES	4

/* setfsuid or setfsgid, id0 == fsuid or fsgid */
#define LSM_SETID_FS	8

/* forward declares to avoid warnings */
struct sched_param;
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struct request_sock;
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/* bprm->unsafe reasons */
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#define LSM_UNSAFE_SHARE	1
#define LSM_UNSAFE_PTRACE	2
#define LSM_UNSAFE_PTRACE_CAP	4
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#define LSM_UNSAFE_NO_NEW_PRIVS	8
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#ifdef CONFIG_MMU
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extern int mmap_min_addr_handler(struct ctl_table *table, int write,
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				 void __user *buffer, size_t *lenp, loff_t *ppos);
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#endif
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/* security_inode_init_security callback function to write xattrs */
typedef int (*initxattrs) (struct inode *inode,
			   const struct xattr *xattr_array, void *fs_data);

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#ifdef CONFIG_SECURITY

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struct security_mnt_opts {
	char **mnt_opts;
	int *mnt_opts_flags;
	int num_mnt_opts;
};

static inline void security_init_mnt_opts(struct security_mnt_opts *opts)
{
	opts->mnt_opts = NULL;
	opts->mnt_opts_flags = NULL;
	opts->num_mnt_opts = 0;
}

static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
{
	int i;
	if (opts->mnt_opts)
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		for (i = 0; i < opts->num_mnt_opts; i++)
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			kfree(opts->mnt_opts[i]);
	kfree(opts->mnt_opts);
	opts->mnt_opts = NULL;
	kfree(opts->mnt_opts_flags);
	opts->mnt_opts_flags = NULL;
	opts->num_mnt_opts = 0;
}

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/**
 * struct security_operations - main security structure
 *
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 * Security module identifier.
 *
 * @name:
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 *	A string that acts as a unique identifier for the LSM with max number
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 *	of characters = SECURITY_NAME_MAX.
 *
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 * Security hooks for program execution operations.
 *
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 * @bprm_set_creds:
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 *	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:
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 *	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.
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 *	@bprm contains the linux_binprm structure.
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 *	Return 0 if the hook is successful and permission is granted.
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 * @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().
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 * @bprm_secureexec:
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 *	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.
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 *
 * 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:
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 *	Check permission before obtaining filesystem statistics for the @mnt
 *	mountpoint.
 *	@dentry is a handle on the superblock for the filesystem.
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 *	Return 0 if permission is granted.
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 * @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.
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 *	@path contains the path for mount point object.
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 *	@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.
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 * @sb_remount:
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 *	Extracts security system specific mount options and verifies no changes
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 *	are being made to those options.
 *	@sb superblock being remounted
 *	@data contains the filesystem-specific data.
 *	Return 0 if permission is granted.
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 * @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.
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 *	@old_path contains the path for the new location of the current root (put_old).
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 *	@new_path contains the path for the new root (new_root).
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 *	Return 0 if permission is granted.
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 * @sb_set_mnt_opts:
 *	Set the security relevant mount options used for a superblock
 *	@sb the superblock to set security mount options for
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 *	@opts binary data structure containing all lsm mount data
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 * @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
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 * @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
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 *
 * 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
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 *	NULL.
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 * @inode_init_security:
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 *	Obtain the security attribute name suffix and value to set on a newly
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 *	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.
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 *	@qstr contains the last path component of the new object
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 *	@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.
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 * @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.
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 * @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.
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 * @inode_unlink:
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 *	Check the permission to remove a hard link to a file.
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 *	@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.
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 * @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.
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 * @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.
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 * @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.
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 * @inode_mkdir:
 *	Check permissions to create a new directory in the existing directory
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 *	associated with inode structure @dir.
 *	@dir contains the inode structure of parent of the directory to be created.
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 *	@dentry contains the dentry structure of new directory.
 *	@mode contains the mode of new directory.
 *	Return 0 if permission is granted.
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 * @path_mkdir:
 *	Check permissions to create a new directory in the existing directory
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 *	associated with path structure @path.
 *	@dir contains the path structure of parent of the directory
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 *	to be created.
 *	@dentry contains the dentry structure of new directory.
 *	@mode contains the mode of new directory.
 *	Return 0 if permission is granted.
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 * @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.
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 * @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.
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 * @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.
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 *	@dev contains the device number.
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 *	Return 0 if permission is granted.
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 * @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.
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 * @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.
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 * @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.
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 * @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.
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 * @path_chroot:
 *	Check for permission to change root directory.
 *	@path contains the path structure.
 *	Return 0 if permission is granted.
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 * @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.
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 * @path_truncate:
 *	Check permission before truncating a file.
 *	@path contains the path structure for the file.
 *	Return 0 if permission is granted.
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 * @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:
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 *	Check permission before setting the extended attributes
 *	@value identified by @name for @dentry.
 *	Return 0 if permission is granted.
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 * @inode_post_setxattr:
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 *	Update inode security field after successful setxattr operation.
 *	@value identified by @name for @dentry.
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 * @inode_getxattr:
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 *	Check permission before obtaining the extended attributes
 *	identified by @name for @dentry.
 *	Return 0 if permission is granted.
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 * @inode_listxattr:
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 *	Check permission before obtaining the list of extended attribute
 *	names for @dentry.
 *	Return 0 if permission is granted.
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 * @inode_removexattr:
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 *	Check permission before removing the extended attribute
 *	identified by @name for @dentry.
 *	Return 0 if permission is granted.
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 * @inode_getsecurity:
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 *	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.
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 * @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.
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 *	Note that @name is the remainder of the attribute name after the
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 *	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.
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 * @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.
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 * @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.
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 *
 * 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.
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 *	Check permission for an ioctl operation on @file.  Note that @arg
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 *	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.
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 * @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 :
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 *	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
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 *	from being performed on the file @file.  Note that @arg sometimes
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 *	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:
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 *		container_of(fown, struct file, f_owner)
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 *	@tsk contains the structure of task receiving signal.
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 *	@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.
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 * @file_open
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 *	Save open-time permission checking state for later use upon
 *	file_permission, and recheck access if anything has changed
 *	since inode_permission.
 *
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 * 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.
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 * @task_free:
 *	@task task being freed
 *	Handle release of task-related resources. (Note that this can be called
 *	from interrupt context.)
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 * @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.
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 * @cred_free:
 *	@cred points to the credentials.
 *	Deallocate and clear the cred->security field in a set of credentials.
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 * @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.
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 * @cred_transfer:
 *	@new points to the new credentials.
 *	@old points to the original credentials.
 *	Transfer data from original creds to new creds
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 * @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.
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 * @kernel_module_request:
 *	Ability to trigger the kernel to automatically upcall to userspace for
 *	userspace to load a kernel module with the given name.
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 *	@kmod_name name of the module requested by the kernel
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 *	Return 0 if successful.
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 * @task_fix_setuid:
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 *	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
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 *	@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
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 *	@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.
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 * @task_getsecid:
 *	Retrieve the security identifier of the process @p.
 *	@p contains the task_struct for the process and place is into @secid.
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 *	In case of failure, @secid will be set to zero.
 *
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 * @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.
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 * @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.
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 * @task_getioprio
 *	Check permission before getting the ioprio value of @p.
 *	@p contains the task_struct of process.
 *	Return 0 if permission is granted.
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 * @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.
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 * @task_movememory
 *	Check permission before moving memory owned by process @p.
 *	@p contains the task_struct for process.
 *	Return 0 if permission is granted.
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 * @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.
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 *	@secid contains the sid of the process where the signal originated
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 *	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.
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 *	Return -ENOSYS if no-one wanted to handle this op, any other value to
 *	cause prctl() to return immediately with that value.
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 * @task_to_inode:
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 *	Set the security attributes for an inode based on an associated task's
 *	security attributes, e.g. for /proc/pid inodes.
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 *	@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
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 *	netlink_skb_parms structure.  Also may be used to provide fine
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 *	grained control over message transmission.
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 *	@sk associated sock of task sending the message.
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 *	@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.
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 *	@sock contains the sock structure.
 *	@other contains the peer sock structure.
 *	@newsk contains the new sock structure.
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 *	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.
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 *	@other contains the peer socket structure.
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 *	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.
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 *	Return 0 if permission is granted.
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 * @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.
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 *	Return 0 if permission is granted.
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 * @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.
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 *	Return 0 if permission is granted.
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 * @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.
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 *	Return 0 if permission is granted.
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 * @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.
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 *	Must not sleep inside this hook because some callers hold spinlocks.
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 *	@sk contains the sock (not socket) associated with the incoming sk_buff.
 *	@skb contains the incoming network data.
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 * @socket_getpeersec_stream:
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 *	This hook allows the security module to provide peer socket security
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 *	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.
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 *	@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.
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 * @socket_getpeersec_dgram:
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 *	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.
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 * @sk_alloc_security:
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 *	Allocate and attach a security structure to the sk->sk_security field,
 *	which is used to copy security attributes between local stream sockets.
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 * @sk_free_security:
 *	Deallocate security structure.
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 * @sk_clone_security:
 *	Clone/copy security structure.
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 * @sk_getsecid:
 *	Retrieve the LSM-specific secid for the sock to enable caching of network
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 *	authorizations.
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 * @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.
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 * @inet_conn_established:
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 *	Sets the connection's peersid to the secmark on skb.
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 * @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
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 * @req_classify_flow:
 *	Sets the flow's sid to the openreq sid.
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 * @tun_dev_create:
 *	Check permissions prior to creating a new TUN device.
 * @tun_dev_post_create:
 *	This hook allows a module to update or allocate a per-socket security
 *	structure.
 *	@sk contains the newly created sock structure.
 * @tun_dev_attach:
 *	Check permissions prior to attaching to a persistent TUN device.  This
 *	hook can also be used by the module to update any security state
 *	associated with the TUN device's sock structure.
 *	@sk contains the existing sock structure.
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 *
 * Security hooks for XFRM operations.
 *
 * @xfrm_policy_alloc_security:
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 *	@ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
 *	Database used by the XFRM system.
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 *	@sec_ctx contains the security context information being provided by
 *	the user-level policy update program (e.g., setkey).
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 *	Allocate a security structure to the xp->security field; the security
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 *	field is initialized to NULL when the xfrm_policy is allocated.
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 *	Return 0 if operation was successful (memory to allocate, legal context)
 * @xfrm_policy_clone_security:
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 *	@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.
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 *	Return 0 if operation was successful (memory to allocate).
 * @xfrm_policy_free_security:
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 *	@ctx contains the xfrm_sec_ctx
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 *	Deallocate xp->security.
 * @xfrm_policy_delete_security:
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 *	@ctx contains the xfrm_sec_ctx.
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 *	Authorize deletion of xp->security.
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 * @xfrm_state_alloc_security:
 *	@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).
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 *	@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 either sec_ctx or polsec, with the mls portion
 *	taken from secid in the latter case.
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 *	Return 0 if operation was successful (memory to allocate, legal context).
 * @xfrm_state_free_security:
 *	@x contains the xfrm_state.
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 *	Deallocate x->security.
 * @xfrm_state_delete_security:
 *	@x contains the xfrm_state.
 *	Authorize deletion of x->security.
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 * @xfrm_policy_lookup:
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 *	@ctx contains the xfrm_sec_ctx for which the access control is being
1038
 *	checked.
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 *	@fl_secid contains the flow security label that is used to authorize
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 *	access to the policy xp.
 *	@dir contains the direction of the flow (input or output).
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 *	Check permission when a flow selects a xfrm_policy for processing
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 *	XFRMs on a packet.  The hook is called when selecting either a
 *	per-socket policy or a generic xfrm policy.
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 *	Return 0 if permission is granted, -ESRCH otherwise, or -errno
 *	on other errors.
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 * @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.
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 *	@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.
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 *
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 * 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.
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 *	@flags is the allocation flags
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 *	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
1072
 *	key.
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 *	@key_ref refers to the key (key pointer + possession attribute bit).
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 *	@cred points to the credentials to provide the context against which to
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 *	evaluate the security data on the key.
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 *	@perm describes the combination of permissions required of this key.
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 *	Return 0 if permission is granted, -ve error otherwise.
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 * @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
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 *	resulting string (if no label or an error occurs).
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 *	Return the length of the string (including terminating NUL) or -ve if
1087
 *	an error.
1088
 *	May also return 0 (and a NULL buffer pointer) if there is no label.
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 *
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 * 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.
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 * @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.
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 *
 * 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.
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 *	Return 0 if permission is granted.
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 * @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
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 *	queue, @msq.  The @target task structure contains a pointer to the
 *	process that will be receiving the message (not equal to the current
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 *	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
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 *	performed on the semaphore @sma.  The @sma may be NULL, e.g. for
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 *	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
1222 1223
 *	semaphore set @sma.  If the @alter flag is nonzero, the semaphore set
 *	may be modified.
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 *	@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.
 *
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 * @ptrace_access_check:
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 *	Check permission before allowing the current process to trace the
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 *	@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
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 *	tracing check during an execve in the bprm_set_creds hook of
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 *	binprm_security_ops if the process is being traced and its security
 *	attributes would be changed by the execve.
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 *	@child contains the task_struct structure for the target process.
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 *	@mode contains the PTRACE_MODE flags indicating the form of access.
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 *	Return 0 if permission is granted.
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 * @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.
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 * @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.
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 * @capset:
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 *	Set the @effective, @inheritable, and @permitted capability sets for
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 *	the current process.
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 *	@new contains the new credentials structure for target process.
 *	@old contains the current credentials structure for target process.
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 *	@effective contains the effective capability set.
 *	@inheritable contains the inheritable capability set.
 *	@permitted contains the permitted capability set.
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 *	Return 0 and update @new if permission is granted.
1266
 * @capable:
1267 1268 1269
 *	Check whether the @tsk process has the @cap capability in the indicated
 *	credentials.
 *	@cred contains the credentials to use.
1270
 *	@ns contains the user namespace we want the capability in
1271
 *	@cap contains the capability <include/linux/capability.h>.
1272
 *	@audit: Whether to write an audit message or not
1273
 *	Return 0 if the capability is granted for @tsk.
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 * @syslog:
 *	Check permission before accessing the kernel message ring or changing
 *	logging to the console.
1277
 *	See the syslog(2) manual page for an explanation of the @type values.
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 *	@type contains the type of action.
1279
 *	@from_file indicates the context of action (if it came from /proc).
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 *	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.
1289
 *	@mm contains the mm struct it is being added to.
1290
 *	@pages contains the number of pages.
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 *	Return 0 if permission is granted.
 *
1293
 * @secid_to_secctx:
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 *	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.
1298 1299
 *	@secid contains the security ID.
 *	@secdata contains the pointer that stores the converted security context.
1300
 *	@seclen pointer which contains the length of the data
1301
 * @secctx_to_secid:
1302 1303 1304
 *	Convert security context to secid.
 *	@secid contains the pointer to the generated security ID.
 *	@secdata contains the security context.
1305 1306 1307 1308 1309 1310
 *
 * @release_secctx:
 *	Release the security context.
 *	@secdata contains the security context.
 *	@seclen contains the length of the security context.
 *
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 * 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
 *
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 * @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:
1372
 *	Returns a string containing all relevant security context information
1373
 *
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 * 	@inode we wish to get the security context of.
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 *	@ctx is a pointer in which to place the allocated security context.
 *	@ctxlen points to the place to put the length of @ctx.
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 * This is the main security structure.
 */
struct security_operations {
1380 1381
	char name[SECURITY_NAME_MAX + 1];

1382
	int (*ptrace_access_check) (struct task_struct *child, unsigned int mode);
1383
	int (*ptrace_traceme) (struct task_struct *parent);
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	int (*capget) (struct task_struct *target,
		       kernel_cap_t *effective,
		       kernel_cap_t *inheritable, kernel_cap_t *permitted);
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	int (*capset) (struct cred *new,
		       const struct cred *old,
		       const kernel_cap_t *effective,
		       const kernel_cap_t *inheritable,
		       const kernel_cap_t *permitted);
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	int (*capable) (const struct cred *cred, struct user_namespace *ns,
			int cap, int audit);
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	int (*quotactl) (int cmds, int type, int id, struct super_block *sb);
	int (*quota_on) (struct dentry *dentry);
1396
	int (*syslog) (int type);
1397
	int (*settime) (const struct timespec *ts, const struct timezone *tz);
1398
	int (*vm_enough_memory) (struct mm_struct *mm, long pages);
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	int (*bprm_set_creds) (struct linux_binprm *bprm);
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	int (*bprm_check_security) (struct linux_binprm *bprm);
	int (*bprm_secureexec) (struct linux_binprm *bprm);
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	void (*bprm_committing_creds) (struct linux_binprm *bprm);
	void (*bprm_committed_creds) (struct linux_binprm *bprm);
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	int (*sb_alloc_security) (struct super_block *sb);
	void (*sb_free_security) (struct super_block *sb);
	int (*sb_copy_data) (char *orig, char *copy);
1409
	int (*sb_remount) (struct super_block *sb, void *data);
1410
	int (*sb_kern_mount) (struct super_block *sb, int flags, void *data);
1411
	int (*sb_show_options) (struct seq_file *m, struct super_block *sb);
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	int (*sb_statfs) (struct dentry *dentry);
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	int (*sb_mount) (char *dev_name, struct path *path,
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			 char *type, unsigned long flags, void *data);
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	int (*sb_umount) (struct vfsmount *mnt, int flags);
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	int (*sb_pivotroot) (struct path *old_path,
			     struct path *new_path);
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	int (*sb_set_mnt_opts) (struct super_block *sb,
				struct security_mnt_opts *opts);
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	void (*sb_clone_mnt_opts) (const struct super_block *oldsb,
				   struct super_block *newsb);
1422
	int (*sb_parse_opts_str) (char *options, struct security_mnt_opts *opts);
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#ifdef CONFIG_SECURITY_PATH
	int (*path_unlink) (struct path *dir, struct dentry *dentry);
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	int (*path_mkdir) (struct path *dir, struct dentry *dentry, umode_t mode);
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	int (*path_rmdir) (struct path *dir, struct dentry *dentry);
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	int (*path_mknod) (struct path *dir, struct dentry *dentry, umode_t mode,
1429
			   unsigned int dev);
1430
	int (*path_truncate) (struct path *path);
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	int (*path_symlink) (struct path *dir, struct dentry *dentry,
			     const char *old_name);
	int (*path_link) (struct dentry *old_dentry, struct path *new_dir,
			  struct dentry *new_dentry);
	int (*path_rename) (struct path *old_dir, struct dentry *old_dentry,
			    struct path *new_dir, struct dentry *new_dentry);
1437
	int (*path_chmod) (struct path *path, umode_t mode);
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	int (*path_chown) (struct path *path, uid_t uid, gid_t gid);
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	int (*path_chroot) (struct path *path);
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#endif

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	int (*inode_alloc_security) (struct inode *inode);
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	void (*inode_free_security) (struct inode *inode);
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	int (*inode_init_security) (struct inode *inode, struct inode *dir,
1445 1446
				    const struct qstr *qstr, char **name,
				    void **value, size_t *len);
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	int (*inode_create) (struct inode *dir,
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			     struct dentry *dentry, umode_t mode);
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	int (*inode_link) (struct dentry *old_dentry,
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			   struct inode *dir, struct dentry *new_dentry);
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	int (*inode_unlink) (struct inode *dir, struct dentry *dentry);
	int (*inode_symlink) (struct inode *dir,
1453
			      struct dentry *dentry, const char *old_name);
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	int (*inode_mkdir) (struct inode *dir, struct dentry *dentry, umode_t mode);
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	int (*inode_rmdir) (struct inode *dir, struct dentry *dentry);
	int (*inode_mknod) (struct inode *dir, struct dentry *dentry,
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			    umode_t mode, dev_t dev);
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	int (*inode_rename) (struct inode *old_dir, struct dentry *old_dentry,
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			     struct inode *new_dir, struct dentry *new_dentry);
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1460 1461
	int (*inode_readlink) (struct dentry *dentry);
	int (*inode_follow_link) (struct dentry *dentry, struct nameidata *nd);
1462
	int (*inode_permission) (struct inode *inode, int mask);
L
Linus Torvalds 已提交
1463 1464
	int (*inode_setattr)	(struct dentry *dentry, struct iattr *attr);
	int (*inode_getattr) (struct vfsmount *mnt, struct dentry *dentry);
1465 1466 1467 1468 1469
	int (*inode_setxattr) (struct dentry *dentry, const char *name,
			       const void *value, size_t size, int flags);
	void (*inode_post_setxattr) (struct dentry *dentry, const char *name,
				     const void *value, size_t size, int flags);
	int (*inode_getxattr) (struct dentry *dentry, const char *name);
L
Linus Torvalds 已提交
1470
	int (*inode_listxattr) (struct dentry *dentry);
1471
	int (*inode_removexattr) (struct dentry *dentry, const char *name);
1472 1473
	int (*inode_need_killpriv) (struct dentry *dentry);
	int (*inode_killpriv) (struct dentry *dentry);
1474 1475 1476 1477 1478 1479 1480 1481 1482
	int (*inode_getsecurity) (const struct inode *inode, const char *name, void **buffer, bool alloc);
	int (*inode_setsecurity) (struct inode *inode, const char *name, const void *value, size_t size, int flags);
	int (*inode_listsecurity) (struct inode *inode, char *buffer, size_t buffer_size);
	void (*inode_getsecid) (const struct inode *inode, u32 *secid);

	int (*file_permission) (struct file *file, int mask);
	int (*file_alloc_security) (struct file *file);
	void (*file_free_security) (struct file *file);
	int (*file_ioctl) (struct file *file, unsigned int cmd,
L
Linus Torvalds 已提交
1483
			   unsigned long arg);
1484 1485
	int (*mmap_addr) (unsigned long addr);
	int (*mmap_file) (struct file *file,
1486
			  unsigned long reqprot, unsigned long prot,
1487
			  unsigned long flags);
1488
	int (*file_mprotect) (struct vm_area_struct *vma,
L
Linus Torvalds 已提交
1489 1490
			      unsigned long reqprot,
			      unsigned long prot);
1491 1492
	int (*file_lock) (struct file *file, unsigned int cmd);
	int (*file_fcntl) (struct file *file, unsigned int cmd,
L
Linus Torvalds 已提交
1493
			   unsigned long arg);
1494 1495 1496 1497
	int (*file_set_fowner) (struct file *file);
	int (*file_send_sigiotask) (struct task_struct *tsk,
				    struct fown_struct *fown, int sig);
	int (*file_receive) (struct file *file);
1498
	int (*file_open) (struct file *file, const struct cred *cred);
L
Linus Torvalds 已提交
1499 1500

	int (*task_create) (unsigned long clone_flags);
1501
	void (*task_free) (struct task_struct *task);
1502
	int (*cred_alloc_blank) (struct cred *cred, gfp_t gfp);
1503
	void (*cred_free) (struct cred *cred);
D
David Howells 已提交
1504 1505
	int (*cred_prepare)(struct cred *new, const struct cred *old,
			    gfp_t gfp);
1506
	void (*cred_transfer)(struct cred *new, const struct cred *old);
1507 1508
	int (*kernel_act_as)(struct cred *new, u32 secid);
	int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
1509
	int (*kernel_module_request)(char *kmod_name);
D
David Howells 已提交
1510 1511
	int (*task_fix_setuid) (struct cred *new, const struct cred *old,
				int flags);
1512 1513 1514 1515 1516 1517 1518
	int (*task_setpgid) (struct task_struct *p, pid_t pgid);
	int (*task_getpgid) (struct task_struct *p);
	int (*task_getsid) (struct task_struct *p);
	void (*task_getsecid) (struct task_struct *p, u32 *secid);
	int (*task_setnice) (struct task_struct *p, int nice);
	int (*task_setioprio) (struct task_struct *p, int ioprio);
	int (*task_getioprio) (struct task_struct *p);
1519 1520
	int (*task_setrlimit) (struct task_struct *p, unsigned int resource,
			struct rlimit *new_rlim);
1521
	int (*task_setscheduler) (struct task_struct *p);
1522 1523 1524 1525 1526
	int (*task_getscheduler) (struct task_struct *p);
	int (*task_movememory) (struct task_struct *p);
	int (*task_kill) (struct task_struct *p,
			  struct siginfo *info, int sig, u32 secid);
	int (*task_wait) (struct task_struct *p);
L
Linus Torvalds 已提交
1527 1528
	int (*task_prctl) (int option, unsigned long arg2,
			   unsigned long arg3, unsigned long arg4,
D
David Howells 已提交
1529
			   unsigned long arg5);
1530
	void (*task_to_inode) (struct task_struct *p, struct inode *inode);
L
Linus Torvalds 已提交
1531

1532
	int (*ipc_permission) (struct kern_ipc_perm *ipcp, short flag);
1533
	void (*ipc_getsecid) (struct kern_ipc_perm *ipcp, u32 *secid);
L
Linus Torvalds 已提交
1534

1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546
	int (*msg_msg_alloc_security) (struct msg_msg *msg);
	void (*msg_msg_free_security) (struct msg_msg *msg);

	int (*msg_queue_alloc_security) (struct msg_queue *msq);
	void (*msg_queue_free_security) (struct msg_queue *msq);
	int (*msg_queue_associate) (struct msg_queue *msq, int msqflg);
	int (*msg_queue_msgctl) (struct msg_queue *msq, int cmd);
	int (*msg_queue_msgsnd) (struct msg_queue *msq,
				 struct msg_msg *msg, int msqflg);
	int (*msg_queue_msgrcv) (struct msg_queue *msq,
				 struct msg_msg *msg,
				 struct task_struct *target,
L
Linus Torvalds 已提交
1547 1548
				 long type, int mode);

1549 1550 1551 1552 1553
	int (*shm_alloc_security) (struct shmid_kernel *shp);
	void (*shm_free_security) (struct shmid_kernel *shp);
	int (*shm_associate) (struct shmid_kernel *shp, int shmflg);
	int (*shm_shmctl) (struct shmid_kernel *shp, int cmd);
	int (*shm_shmat) (struct shmid_kernel *shp,
L
Linus Torvalds 已提交
1554 1555
			  char __user *shmaddr, int shmflg);

1556 1557 1558 1559 1560 1561
	int (*sem_alloc_security) (struct sem_array *sma);
	void (*sem_free_security) (struct sem_array *sma);
	int (*sem_associate) (struct sem_array *sma, int semflg);
	int (*sem_semctl) (struct sem_array *sma, int cmd);
	int (*sem_semop) (struct sem_array *sma,
			  struct sembuf *sops, unsigned nsops, int alter);
L
Linus Torvalds 已提交
1562

1563
	int (*netlink_send) (struct sock *sk, struct sk_buff *skb);
L
Linus Torvalds 已提交
1564 1565 1566

	void (*d_instantiate) (struct dentry *dentry, struct inode *inode);

1567 1568 1569
	int (*getprocattr) (struct task_struct *p, char *name, char **value);
	int (*setprocattr) (struct task_struct *p, char *name, void *value, size_t size);
	int (*secid_to_secctx) (u32 secid, char **secdata, u32 *seclen);
1570
	int (*secctx_to_secid) (const char *secdata, u32 seclen, u32 *secid);
1571
	void (*release_secctx) (char *secdata, u32 seclen);
L
Linus Torvalds 已提交
1572

1573 1574 1575 1576
	int (*inode_notifysecctx)(struct inode *inode, void *ctx, u32 ctxlen);
	int (*inode_setsecctx)(struct dentry *dentry, void *ctx, u32 ctxlen);
	int (*inode_getsecctx)(struct inode *inode, void **ctx, u32 *ctxlen);

L
Linus Torvalds 已提交
1577
#ifdef CONFIG_SECURITY_NETWORK
1578
	int (*unix_stream_connect) (struct sock *sock, struct sock *other, struct sock *newsk);
1579
	int (*unix_may_send) (struct socket *sock, struct socket *other);
L
Linus Torvalds 已提交
1580 1581

	int (*socket_create) (int family, int type, int protocol, int kern);
1582
	int (*socket_post_create) (struct socket *sock, int family,
V
Venkat Yekkirala 已提交
1583
				   int type, int protocol, int kern);
1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599
	int (*socket_bind) (struct socket *sock,
			    struct sockaddr *address, int addrlen);
	int (*socket_connect) (struct socket *sock,
			       struct sockaddr *address, int addrlen);
	int (*socket_listen) (struct socket *sock, int backlog);
	int (*socket_accept) (struct socket *sock, struct socket *newsock);
	int (*socket_sendmsg) (struct socket *sock,
			       struct msghdr *msg, int size);
	int (*socket_recvmsg) (struct socket *sock,
			       struct msghdr *msg, int size, int flags);
	int (*socket_getsockname) (struct socket *sock);
	int (*socket_getpeername) (struct socket *sock);
	int (*socket_getsockopt) (struct socket *sock, int level, int optname);
	int (*socket_setsockopt) (struct socket *sock, int level, int optname);
	int (*socket_shutdown) (struct socket *sock, int how);
	int (*socket_sock_rcv_skb) (struct sock *sk, struct sk_buff *skb);
C
Catherine Zhang 已提交
1600
	int (*socket_getpeersec_stream) (struct socket *sock, char __user *optval, int __user *optlen, unsigned len);
1601
	int (*socket_getpeersec_dgram) (struct socket *sock, struct sk_buff *skb, u32 *secid);
A
Al Viro 已提交
1602
	int (*sk_alloc_security) (struct sock *sk, int family, gfp_t priority);
L
Linus Torvalds 已提交
1603
	void (*sk_free_security) (struct sock *sk);
1604
	void (*sk_clone_security) (const struct sock *sk, struct sock *newsk);
V
Venkat Yekkirala 已提交
1605
	void (*sk_getsecid) (struct sock *sk, u32 *secid);
1606 1607 1608 1609 1610
	void (*sock_graft) (struct sock *sk, struct socket *parent);
	int (*inet_conn_request) (struct sock *sk, struct sk_buff *skb,
				  struct request_sock *req);
	void (*inet_csk_clone) (struct sock *newsk, const struct request_sock *req);
	void (*inet_conn_established) (struct sock *sk, struct sk_buff *skb);
1611 1612 1613
	int (*secmark_relabel_packet) (u32 secid);
	void (*secmark_refcount_inc) (void);
	void (*secmark_refcount_dec) (void);
1614
	void (*req_classify_flow) (const struct request_sock *req, struct flowi *fl);
P
Paul Moore 已提交
1615 1616 1617
	int (*tun_dev_create)(void);
	void (*tun_dev_post_create)(struct sock *sk);
	int (*tun_dev_attach)(struct sock *sk);
L
Linus Torvalds 已提交
1618
#endif	/* CONFIG_SECURITY_NETWORK */
1619

1620
#ifdef CONFIG_SECURITY_NETWORK_XFRM
1621
	int (*xfrm_policy_alloc_security) (struct xfrm_sec_ctx **ctxp,
1622
			struct xfrm_user_sec_ctx *sec_ctx);
1623 1624 1625
	int (*xfrm_policy_clone_security) (struct xfrm_sec_ctx *old_ctx, struct xfrm_sec_ctx **new_ctx);
	void (*xfrm_policy_free_security) (struct xfrm_sec_ctx *ctx);
	int (*xfrm_policy_delete_security) (struct xfrm_sec_ctx *ctx);
1626
	int (*xfrm_state_alloc_security) (struct xfrm_state *x,
1627
		struct xfrm_user_sec_ctx *sec_ctx,
1628
		u32 secid);
1629
	void (*xfrm_state_free_security) (struct xfrm_state *x);
C
Catherine Zhang 已提交
1630
	int (*xfrm_state_delete_security) (struct xfrm_state *x);
1631 1632 1633
	int (*xfrm_policy_lookup) (struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
	int (*xfrm_state_pol_flow_match) (struct xfrm_state *x,
					  struct xfrm_policy *xp,
1634
					  const struct flowi *fl);
1635
	int (*xfrm_decode_session) (struct sk_buff *skb, u32 *secid, int ckall);
1636 1637
#endif	/* CONFIG_SECURITY_NETWORK_XFRM */

1638 1639
	/* key management security hooks */
#ifdef CONFIG_KEYS
D
David Howells 已提交
1640
	int (*key_alloc) (struct key *key, const struct cred *cred, unsigned long flags);
1641 1642
	void (*key_free) (struct key *key);
	int (*key_permission) (key_ref_t key_ref,
D
David Howells 已提交
1643
			       const struct cred *cred,
1644
			       key_perm_t perm);
1645
	int (*key_getsecurity)(struct key *key, char **_buffer);
1646 1647
#endif	/* CONFIG_KEYS */

1648
#ifdef CONFIG_AUDIT
1649 1650 1651 1652 1653
	int (*audit_rule_init) (u32 field, u32 op, char *rulestr, void **lsmrule);
	int (*audit_rule_known) (struct audit_krule *krule);
	int (*audit_rule_match) (u32 secid, u32 field, u32 op, void *lsmrule,
				 struct audit_context *actx);
	void (*audit_rule_free) (void *lsmrule);
1654
#endif /* CONFIG_AUDIT */
L
Linus Torvalds 已提交
1655 1656 1657
};

/* prototypes */
1658
extern int security_init(void);
1659
extern int security_module_enable(struct security_operations *ops);
1660
extern int register_security(struct security_operations *ops);
1661 1662
extern void __init security_fixup_ops(struct security_operations *ops);

L
Linus Torvalds 已提交
1663

1664
/* Security operations */
1665
int security_ptrace_access_check(struct task_struct *child, unsigned int mode);
1666
int security_ptrace_traceme(struct task_struct *parent);
1667
int security_capget(struct task_struct *target,
1668 1669 1670
		    kernel_cap_t *effective,
		    kernel_cap_t *inheritable,
		    kernel_cap_t *permitted);
D
David Howells 已提交
1671 1672 1673 1674
int security_capset(struct cred *new, const struct cred *old,
		    const kernel_cap_t *effective,
		    const kernel_cap_t *inheritable,
		    const kernel_cap_t *permitted);
1675
int security_capable(const struct cred *cred, struct user_namespace *ns,
1676
			int cap);
1677 1678
int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
			     int cap);
1679 1680
int security_quotactl(int cmds, int type, int id, struct super_block *sb);
int security_quota_on(struct dentry *dentry);
1681
int security_syslog(int type);
1682
int security_settime(const struct timespec *ts, const struct timezone *tz);
1683
int security_vm_enough_memory_mm(struct mm_struct *mm, long pages);
1684
int security_bprm_set_creds(struct linux_binprm *bprm);
1685
int security_bprm_check(struct linux_binprm *bprm);
1686 1687
void security_bprm_committing_creds(struct linux_binprm *bprm);
void security_bprm_committed_creds(struct linux_binprm *bprm);
1688 1689 1690
int security_bprm_secureexec(struct linux_binprm *bprm);
int security_sb_alloc(struct super_block *sb);
void security_sb_free(struct super_block *sb);
1691
int security_sb_copy_data(char *orig, char *copy);
1692
int security_sb_remount(struct super_block *sb, void *data);
1693
int security_sb_kern_mount(struct super_block *sb, int flags, void *data);
1694
int security_sb_show_options(struct seq_file *m, struct super_block *sb);
1695
int security_sb_statfs(struct dentry *dentry);
1696
int security_sb_mount(char *dev_name, struct path *path,
1697
		      char *type, unsigned long flags, void *data);
1698
int security_sb_umount(struct vfsmount *mnt, int flags);
1699
int security_sb_pivotroot(struct path *old_path, struct path *new_path);
1700
int security_sb_set_mnt_opts(struct super_block *sb, struct security_mnt_opts *opts);
1701 1702
void security_sb_clone_mnt_opts(const struct super_block *oldsb,
				struct super_block *newsb);
1703
int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts);
1704

1705 1706 1707
int security_inode_alloc(struct inode *inode);
void security_inode_free(struct inode *inode);
int security_inode_init_security(struct inode *inode, struct inode *dir,
1708 1709 1710 1711 1712
				 const struct qstr *qstr,
				 initxattrs initxattrs, void *fs_data);
int security_old_inode_init_security(struct inode *inode, struct inode *dir,
				     const struct qstr *qstr, char **name,
				     void **value, size_t *len);
A
Al Viro 已提交
1713
int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode);
1714 1715 1716 1717
int security_inode_link(struct dentry *old_dentry, struct inode *dir,
			 struct dentry *new_dentry);
int security_inode_unlink(struct inode *dir, struct dentry *dentry);
int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1718
			   const char *old_name);
1719
int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
1720
int security_inode_rmdir(struct inode *dir, struct dentry *dentry);
A
Al Viro 已提交
1721
int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev);
1722
int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1723
			  struct inode *new_dir, struct dentry *new_dentry);
1724 1725
int security_inode_readlink(struct dentry *dentry);
int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd);
1726
int security_inode_permission(struct inode *inode, int mask);
1727 1728
int security_inode_setattr(struct dentry *dentry, struct iattr *attr);
int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry);
1729 1730 1731 1732 1733
int security_inode_setxattr(struct dentry *dentry, const char *name,
			    const void *value, size_t size, int flags);
void security_inode_post_setxattr(struct dentry *dentry, const char *name,
				  const void *value, size_t size, int flags);
int security_inode_getxattr(struct dentry *dentry, const char *name);
1734
int security_inode_listxattr(struct dentry *dentry);
1735
int security_inode_removexattr(struct dentry *dentry, const char *name);
1736 1737
int security_inode_need_killpriv(struct dentry *dentry);
int security_inode_killpriv(struct dentry *dentry);
1738
int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc);
1739 1740
int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags);
int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size);
1741
void security_inode_getsecid(const struct inode *inode, u32 *secid);
1742 1743 1744 1745
int security_file_permission(struct file *file, int mask);
int security_file_alloc(struct file *file);
void security_file_free(struct file *file);
int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1746 1747
int security_mmap_file(struct file *file, unsigned long prot,
			unsigned long flags);
1748
int security_mmap_addr(unsigned long addr);
1749
int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1750
			   unsigned long prot);
1751 1752 1753 1754
int security_file_lock(struct file *file, unsigned int cmd);
int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg);
int security_file_set_fowner(struct file *file);
int security_file_send_sigiotask(struct task_struct *tsk,
1755
				 struct fown_struct *fown, int sig);
1756
int security_file_receive(struct file *file);
1757
int security_file_open(struct file *file, const struct cred *cred);
1758
int security_task_create(unsigned long clone_flags);
1759
void security_task_free(struct task_struct *task);
1760
int security_cred_alloc_blank(struct cred *cred, gfp_t gfp);
1761
void security_cred_free(struct cred *cred);
D
David Howells 已提交
1762
int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp);
1763
void security_transfer_creds(struct cred *new, const struct cred *old);
1764 1765
int security_kernel_act_as(struct cred *new, u32 secid);
int security_kernel_create_files_as(struct cred *new, struct inode *inode);
1766
int security_kernel_module_request(char *kmod_name);
D
David Howells 已提交
1767 1768
int security_task_fix_setuid(struct cred *new, const struct cred *old,
			     int flags);
1769 1770 1771 1772 1773 1774 1775
int security_task_setpgid(struct task_struct *p, pid_t pgid);
int security_task_getpgid(struct task_struct *p);
int security_task_getsid(struct task_struct *p);
void security_task_getsecid(struct task_struct *p, u32 *secid);
int security_task_setnice(struct task_struct *p, int nice);
int security_task_setioprio(struct task_struct *p, int ioprio);
int security_task_getioprio(struct task_struct *p);
1776 1777
int security_task_setrlimit(struct task_struct *p, unsigned int resource,
		struct rlimit *new_rlim);
1778
int security_task_setscheduler(struct task_struct *p);
1779 1780 1781 1782 1783 1784
int security_task_getscheduler(struct task_struct *p);
int security_task_movememory(struct task_struct *p);
int security_task_kill(struct task_struct *p, struct siginfo *info,
			int sig, u32 secid);
int security_task_wait(struct task_struct *p);
int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
D
David Howells 已提交
1785
			unsigned long arg4, unsigned long arg5);
1786 1787
void security_task_to_inode(struct task_struct *p, struct inode *inode);
int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag);
1788
void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid);
1789 1790 1791 1792 1793 1794 1795
int security_msg_msg_alloc(struct msg_msg *msg);
void security_msg_msg_free(struct msg_msg *msg);
int security_msg_queue_alloc(struct msg_queue *msq);
void security_msg_queue_free(struct msg_queue *msq);
int security_msg_queue_associate(struct msg_queue *msq, int msqflg);
int security_msg_queue_msgctl(struct msg_queue *msq, int cmd);
int security_msg_queue_msgsnd(struct msg_queue *msq,
1796
			      struct msg_msg *msg, int msqflg);
1797
int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
1798
			      struct task_struct *target, long type, int mode);
1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809
int security_shm_alloc(struct shmid_kernel *shp);
void security_shm_free(struct shmid_kernel *shp);
int security_shm_associate(struct shmid_kernel *shp, int shmflg);
int security_shm_shmctl(struct shmid_kernel *shp, int cmd);
int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg);
int security_sem_alloc(struct sem_array *sma);
void security_sem_free(struct sem_array *sma);
int security_sem_associate(struct sem_array *sma, int semflg);
int security_sem_semctl(struct sem_array *sma, int cmd);
int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
			unsigned nsops, int alter);
1810
void security_d_instantiate(struct dentry *dentry, struct inode *inode);
1811 1812 1813 1814
int security_getprocattr(struct task_struct *p, char *name, char **value);
int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size);
int security_netlink_send(struct sock *sk, struct sk_buff *skb);
int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen);
1815
int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid);
1816 1817
void security_release_secctx(char *secdata, u32 seclen);

1818 1819 1820
int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen);
int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen);
int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen);
L
Linus Torvalds 已提交
1821
#else /* CONFIG_SECURITY */
1822 1823 1824 1825 1826 1827 1828 1829 1830 1831
struct security_mnt_opts {
};

static inline void security_init_mnt_opts(struct security_mnt_opts *opts)
{
}

static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
{
}
L
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1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842

/*
 * This is the default capabilities functionality.  Most of these functions
 * are just stubbed out, but a few must call the proper capable code.
 */

static inline int security_init(void)
{
	return 0;
}

1843
static inline int security_ptrace_access_check(struct task_struct *child,
1844 1845
					     unsigned int mode)
{
1846
	return cap_ptrace_access_check(child, mode);
1847 1848
}

1849
static inline int security_ptrace_traceme(struct task_struct *parent)
L
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1850
{
1851
	return cap_ptrace_traceme(parent);
L
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1852 1853
}

1854
static inline int security_capget(struct task_struct *target,
L
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1855 1856 1857 1858
				   kernel_cap_t *effective,
				   kernel_cap_t *inheritable,
				   kernel_cap_t *permitted)
{
1859
	return cap_capget(target, effective, inheritable, permitted);
L
Linus Torvalds 已提交
1860 1861
}

D
David Howells 已提交
1862 1863 1864 1865 1866
static inline int security_capset(struct cred *new,
				   const struct cred *old,
				   const kernel_cap_t *effective,
				   const kernel_cap_t *inheritable,
				   const kernel_cap_t *permitted)
L
Linus Torvalds 已提交
1867
{
D
David Howells 已提交
1868
	return cap_capset(new, old, effective, inheritable, permitted);
L
Linus Torvalds 已提交
1869 1870
}

1871 1872
static inline int security_capable(const struct cred *cred,
				   struct user_namespace *ns, int cap)
1873
{
1874
	return cap_capable(cred, ns, cap, SECURITY_CAP_AUDIT);
1875 1876
}

1877 1878 1879
static inline int security_capable_noaudit(const struct cred *cred,
					   struct user_namespace *ns, int cap) {
	return cap_capable(cred, ns, cap, SECURITY_CAP_NOAUDIT);
1880 1881
}

1882 1883
static inline int security_quotactl(int cmds, int type, int id,
				     struct super_block *sb)
L
Linus Torvalds 已提交
1884 1885 1886 1887
{
	return 0;
}

1888
static inline int security_quota_on(struct dentry *dentry)
L
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1889 1890 1891 1892
{
	return 0;
}

1893
static inline int security_syslog(int type)
L
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1894
{
1895
	return 0;
L
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1896 1897
}

1898 1899
static inline int security_settime(const struct timespec *ts,
				   const struct timezone *tz)
L
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1900 1901 1902 1903
{
	return cap_settime(ts, tz);
}

1904
static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
A
Alan Cox 已提交
1905
{
1906
	return cap_vm_enough_memory(mm, pages);
A
Alan Cox 已提交
1907 1908
}

1909
static inline int security_bprm_set_creds(struct linux_binprm *bprm)
1910
{
1911
	return cap_bprm_set_creds(bprm);
L
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1912 1913
}

1914
static inline int security_bprm_check(struct linux_binprm *bprm)
L
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1915
{
1916
	return 0;
L
Linus Torvalds 已提交
1917 1918
}

1919
static inline void security_bprm_committing_creds(struct linux_binprm *bprm)
L
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1920 1921 1922
{
}

1923
static inline void security_bprm_committed_creds(struct linux_binprm *bprm)
L
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1924 1925 1926
{
}

1927
static inline int security_bprm_secureexec(struct linux_binprm *bprm)
L
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1928 1929 1930 1931
{
	return cap_bprm_secureexec(bprm);
}

1932
static inline int security_sb_alloc(struct super_block *sb)
L
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1933 1934 1935 1936
{
	return 0;
}

1937
static inline void security_sb_free(struct super_block *sb)
L
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1938 1939
{ }

1940
static inline int security_sb_copy_data(char *orig, char *copy)
L
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1941 1942 1943 1944
{
	return 0;
}

1945 1946 1947 1948 1949
static inline int security_sb_remount(struct super_block *sb, void *data)
{
	return 0;
}

1950
static inline int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
L
Linus Torvalds 已提交
1951 1952 1953 1954
{
	return 0;
}

1955 1956 1957 1958 1959 1960
static inline int security_sb_show_options(struct seq_file *m,
					   struct super_block *sb)
{
	return 0;
}

1961
static inline int security_sb_statfs(struct dentry *dentry)
L
Linus Torvalds 已提交
1962 1963 1964 1965
{
	return 0;
}

1966
static inline int security_sb_mount(char *dev_name, struct path *path,
L
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1967 1968 1969 1970 1971 1972
				    char *type, unsigned long flags,
				    void *data)
{
	return 0;
}

1973
static inline int security_sb_umount(struct vfsmount *mnt, int flags)
L
Linus Torvalds 已提交
1974 1975 1976 1977
{
	return 0;
}

1978 1979
static inline int security_sb_pivotroot(struct path *old_path,
					struct path *new_path)
L
Linus Torvalds 已提交
1980 1981 1982 1983
{
	return 0;
}

1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
static inline int security_sb_set_mnt_opts(struct super_block *sb,
					   struct security_mnt_opts *opts)
{
	return 0;
}

static inline void security_sb_clone_mnt_opts(const struct super_block *oldsb,
					      struct super_block *newsb)
{ }

static inline int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
{
	return 0;
}
L
Linus Torvalds 已提交
1998

1999
static inline int security_inode_alloc(struct inode *inode)
L
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2000 2001 2002 2003
{
	return 0;
}

2004
static inline void security_inode_free(struct inode *inode)
L
Linus Torvalds 已提交
2005
{ }
2006

2007
static inline int security_inode_init_security(struct inode *inode,
2008
						struct inode *dir,
2009
						const struct qstr *qstr,
2010
						const initxattrs initxattrs,
2011
						void *fs_data)
2012
{
M
Mimi Zohar 已提交
2013
	return 0;
2014
}
2015

M
Mimi Zohar 已提交
2016 2017 2018 2019 2020
static inline int security_old_inode_init_security(struct inode *inode,
						   struct inode *dir,
						   const struct qstr *qstr,
						   char **name, void **value,
						   size_t *len)
2021
{
2022
	return -EOPNOTSUPP;
2023 2024
}

2025
static inline int security_inode_create(struct inode *dir,
L
Linus Torvalds 已提交
2026
					 struct dentry *dentry,
A
Al Viro 已提交
2027
					 umode_t mode)
L
Linus Torvalds 已提交
2028 2029 2030 2031
{
	return 0;
}

2032
static inline int security_inode_link(struct dentry *old_dentry,
L
Linus Torvalds 已提交
2033 2034 2035 2036 2037 2038
				       struct inode *dir,
				       struct dentry *new_dentry)
{
	return 0;
}

2039
static inline int security_inode_unlink(struct inode *dir,
L
Linus Torvalds 已提交
2040 2041 2042 2043 2044
					 struct dentry *dentry)
{
	return 0;
}

2045
static inline int security_inode_symlink(struct inode *dir,
L
Linus Torvalds 已提交
2046 2047 2048 2049 2050 2051
					  struct dentry *dentry,
					  const char *old_name)
{
	return 0;
}

2052
static inline int security_inode_mkdir(struct inode *dir,
L
Linus Torvalds 已提交
2053 2054 2055 2056 2057 2058
					struct dentry *dentry,
					int mode)
{
	return 0;
}

2059
static inline int security_inode_rmdir(struct inode *dir,
L
Linus Torvalds 已提交
2060 2061 2062 2063 2064
					struct dentry *dentry)
{
	return 0;
}

2065
static inline int security_inode_mknod(struct inode *dir,
L
Linus Torvalds 已提交
2066 2067 2068 2069 2070 2071
					struct dentry *dentry,
					int mode, dev_t dev)
{
	return 0;
}

2072
static inline int security_inode_rename(struct inode *old_dir,
L
Linus Torvalds 已提交
2073 2074 2075 2076 2077 2078 2079
					 struct dentry *old_dentry,
					 struct inode *new_dir,
					 struct dentry *new_dentry)
{
	return 0;
}

2080
static inline int security_inode_readlink(struct dentry *dentry)
L
Linus Torvalds 已提交
2081 2082 2083 2084
{
	return 0;
}

2085
static inline int security_inode_follow_link(struct dentry *dentry,
L
Linus Torvalds 已提交
2086 2087 2088 2089 2090
					      struct nameidata *nd)
{
	return 0;
}

2091
static inline int security_inode_permission(struct inode *inode, int mask)
L
Linus Torvalds 已提交
2092 2093 2094 2095
{
	return 0;
}

2096
static inline int security_inode_setattr(struct dentry *dentry,
L
Linus Torvalds 已提交
2097 2098 2099 2100 2101
					  struct iattr *attr)
{
	return 0;
}

2102
static inline int security_inode_getattr(struct vfsmount *mnt,
L
Linus Torvalds 已提交
2103 2104 2105 2106 2107
					  struct dentry *dentry)
{
	return 0;
}

2108 2109
static inline int security_inode_setxattr(struct dentry *dentry,
		const char *name, const void *value, size_t size, int flags)
L
Linus Torvalds 已提交
2110 2111 2112 2113
{
	return cap_inode_setxattr(dentry, name, value, size, flags);
}

2114 2115
static inline void security_inode_post_setxattr(struct dentry *dentry,
		const char *name, const void *value, size_t size, int flags)
L
Linus Torvalds 已提交
2116 2117
{ }

2118 2119
static inline int security_inode_getxattr(struct dentry *dentry,
			const char *name)
L
Linus Torvalds 已提交
2120 2121 2122 2123
{
	return 0;
}

2124
static inline int security_inode_listxattr(struct dentry *dentry)
L
Linus Torvalds 已提交
2125 2126 2127 2128
{
	return 0;
}

2129 2130
static inline int security_inode_removexattr(struct dentry *dentry,
			const char *name)
L
Linus Torvalds 已提交
2131 2132 2133 2134
{
	return cap_inode_removexattr(dentry, name);
}

2135 2136 2137 2138 2139 2140 2141 2142 2143 2144
static inline int security_inode_need_killpriv(struct dentry *dentry)
{
	return cap_inode_need_killpriv(dentry);
}

static inline int security_inode_killpriv(struct dentry *dentry)
{
	return cap_inode_killpriv(dentry);
}

2145
static inline int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
L
Linus Torvalds 已提交
2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159
{
	return -EOPNOTSUPP;
}

static inline int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
{
	return -EOPNOTSUPP;
}

static inline int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
{
	return 0;
}

2160 2161 2162 2163 2164
static inline void security_inode_getsecid(const struct inode *inode, u32 *secid)
{
	*secid = 0;
}

2165
static inline int security_file_permission(struct file *file, int mask)
L
Linus Torvalds 已提交
2166 2167 2168 2169
{
	return 0;
}

2170
static inline int security_file_alloc(struct file *file)
L
Linus Torvalds 已提交
2171 2172 2173 2174
{
	return 0;
}

2175
static inline void security_file_free(struct file *file)
L
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2176 2177
{ }

2178 2179
static inline int security_file_ioctl(struct file *file, unsigned int cmd,
				      unsigned long arg)
L
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2180 2181 2182 2183
{
	return 0;
}

2184
static inline int security_mmap_file(struct file *file, unsigned long prot,
2185 2186 2187 2188 2189 2190
				     unsigned long flags)
{
	return 0;
}

static inline int security_mmap_addr(unsigned long addr)
L
Linus Torvalds 已提交
2191
{
2192
	return cap_mmap_addr(addr);
L
Linus Torvalds 已提交
2193 2194
}

2195 2196 2197
static inline int security_file_mprotect(struct vm_area_struct *vma,
					 unsigned long reqprot,
					 unsigned long prot)
L
Linus Torvalds 已提交
2198 2199 2200 2201
{
	return 0;
}

2202
static inline int security_file_lock(struct file *file, unsigned int cmd)
L
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2203 2204 2205 2206
{
	return 0;
}

2207 2208
static inline int security_file_fcntl(struct file *file, unsigned int cmd,
				      unsigned long arg)
L
Linus Torvalds 已提交
2209 2210 2211 2212
{
	return 0;
}

2213
static inline int security_file_set_fowner(struct file *file)
L
Linus Torvalds 已提交
2214 2215 2216 2217
{
	return 0;
}

2218 2219 2220
static inline int security_file_send_sigiotask(struct task_struct *tsk,
					       struct fown_struct *fown,
					       int sig)
L
Linus Torvalds 已提交
2221 2222 2223 2224
{
	return 0;
}

2225
static inline int security_file_receive(struct file *file)
L
Linus Torvalds 已提交
2226 2227 2228 2229
{
	return 0;
}

2230 2231
static inline int security_file_open(struct file *file,
				     const struct cred *cred)
2232 2233 2234 2235
{
	return 0;
}

2236
static inline int security_task_create(unsigned long clone_flags)
L
Linus Torvalds 已提交
2237 2238 2239 2240
{
	return 0;
}

2241 2242 2243
static inline void security_task_free(struct task_struct *task)
{ }

2244 2245 2246 2247
static inline int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
{
	return 0;
}
2248

D
David Howells 已提交
2249 2250 2251 2252 2253 2254
static inline void security_cred_free(struct cred *cred)
{ }

static inline int security_prepare_creds(struct cred *new,
					 const struct cred *old,
					 gfp_t gfp)
L
Linus Torvalds 已提交
2255 2256 2257 2258
{
	return 0;
}

2259 2260 2261 2262 2263
static inline void security_transfer_creds(struct cred *new,
					   const struct cred *old)
{
}

2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274
static inline int security_kernel_act_as(struct cred *cred, u32 secid)
{
	return 0;
}

static inline int security_kernel_create_files_as(struct cred *cred,
						  struct inode *inode)
{
	return 0;
}

2275
static inline int security_kernel_module_request(char *kmod_name)
2276 2277
{
	return 0;
L
Linus Torvalds 已提交
2278 2279
}

D
David Howells 已提交
2280 2281 2282
static inline int security_task_fix_setuid(struct cred *new,
					   const struct cred *old,
					   int flags)
L
Linus Torvalds 已提交
2283
{
D
David Howells 已提交
2284
	return cap_task_fix_setuid(new, old, flags);
L
Linus Torvalds 已提交
2285 2286
}

2287
static inline int security_task_setpgid(struct task_struct *p, pid_t pgid)
L
Linus Torvalds 已提交
2288 2289 2290 2291
{
	return 0;
}

2292
static inline int security_task_getpgid(struct task_struct *p)
L
Linus Torvalds 已提交
2293 2294 2295 2296
{
	return 0;
}

2297
static inline int security_task_getsid(struct task_struct *p)
L
Linus Torvalds 已提交
2298 2299 2300 2301
{
	return 0;
}

2302
static inline void security_task_getsecid(struct task_struct *p, u32 *secid)
2303 2304 2305
{
	*secid = 0;
}
2306

2307
static inline int security_task_setnice(struct task_struct *p, int nice)
L
Linus Torvalds 已提交
2308
{
2309
	return cap_task_setnice(p, nice);
L
Linus Torvalds 已提交
2310 2311
}

2312
static inline int security_task_setioprio(struct task_struct *p, int ioprio)
2313
{
2314
	return cap_task_setioprio(p, ioprio);
2315 2316
}

2317
static inline int security_task_getioprio(struct task_struct *p)
2318 2319 2320 2321
{
	return 0;
}

2322 2323
static inline int security_task_setrlimit(struct task_struct *p,
					  unsigned int resource,
2324
					  struct rlimit *new_rlim)
L
Linus Torvalds 已提交
2325 2326 2327 2328
{
	return 0;
}

2329
static inline int security_task_setscheduler(struct task_struct *p)
L
Linus Torvalds 已提交
2330
{
2331
	return cap_task_setscheduler(p);
L
Linus Torvalds 已提交
2332 2333
}

2334
static inline int security_task_getscheduler(struct task_struct *p)
L
Linus Torvalds 已提交
2335 2336 2337 2338
{
	return 0;
}

2339
static inline int security_task_movememory(struct task_struct *p)
2340 2341 2342 2343
{
	return 0;
}

2344 2345 2346
static inline int security_task_kill(struct task_struct *p,
				     struct siginfo *info, int sig,
				     u32 secid)
L
Linus Torvalds 已提交
2347
{
2348
	return 0;
L
Linus Torvalds 已提交
2349 2350
}

2351
static inline int security_task_wait(struct task_struct *p)
L
Linus Torvalds 已提交
2352 2353 2354 2355
{
	return 0;
}

2356 2357 2358
static inline int security_task_prctl(int option, unsigned long arg2,
				      unsigned long arg3,
				      unsigned long arg4,
D
David Howells 已提交
2359
				      unsigned long arg5)
L
Linus Torvalds 已提交
2360
{
D
David Howells 已提交
2361
	return cap_task_prctl(option, arg2, arg3, arg3, arg5);
L
Linus Torvalds 已提交
2362 2363 2364 2365 2366
}

static inline void security_task_to_inode(struct task_struct *p, struct inode *inode)
{ }

2367 2368
static inline int security_ipc_permission(struct kern_ipc_perm *ipcp,
					  short flag)
L
Linus Torvalds 已提交
2369 2370 2371 2372
{
	return 0;
}

2373 2374 2375 2376 2377
static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
{
	*secid = 0;
}

2378
static inline int security_msg_msg_alloc(struct msg_msg *msg)
L
Linus Torvalds 已提交
2379 2380 2381 2382
{
	return 0;
}

2383
static inline void security_msg_msg_free(struct msg_msg *msg)
L
Linus Torvalds 已提交
2384 2385
{ }

2386
static inline int security_msg_queue_alloc(struct msg_queue *msq)
L
Linus Torvalds 已提交
2387 2388 2389 2390
{
	return 0;
}

2391
static inline void security_msg_queue_free(struct msg_queue *msq)
L
Linus Torvalds 已提交
2392 2393
{ }

2394 2395
static inline int security_msg_queue_associate(struct msg_queue *msq,
					       int msqflg)
L
Linus Torvalds 已提交
2396 2397 2398 2399
{
	return 0;
}

2400
static inline int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
L
Linus Torvalds 已提交
2401 2402 2403 2404
{
	return 0;
}

2405 2406
static inline int security_msg_queue_msgsnd(struct msg_queue *msq,
					    struct msg_msg *msg, int msqflg)
L
Linus Torvalds 已提交
2407 2408 2409 2410
{
	return 0;
}

2411 2412 2413 2414
static inline int security_msg_queue_msgrcv(struct msg_queue *msq,
					    struct msg_msg *msg,
					    struct task_struct *target,
					    long type, int mode)
L
Linus Torvalds 已提交
2415 2416 2417 2418
{
	return 0;
}

2419
static inline int security_shm_alloc(struct shmid_kernel *shp)
L
Linus Torvalds 已提交
2420 2421 2422 2423
{
	return 0;
}

2424
static inline void security_shm_free(struct shmid_kernel *shp)
L
Linus Torvalds 已提交
2425 2426
{ }

2427 2428
static inline int security_shm_associate(struct shmid_kernel *shp,
					 int shmflg)
L
Linus Torvalds 已提交
2429 2430 2431 2432
{
	return 0;
}

2433
static inline int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
L
Linus Torvalds 已提交
2434 2435 2436 2437
{
	return 0;
}

2438 2439
static inline int security_shm_shmat(struct shmid_kernel *shp,
				     char __user *shmaddr, int shmflg)
L
Linus Torvalds 已提交
2440 2441 2442 2443
{
	return 0;
}

2444
static inline int security_sem_alloc(struct sem_array *sma)
L
Linus Torvalds 已提交
2445 2446 2447 2448
{
	return 0;
}

2449
static inline void security_sem_free(struct sem_array *sma)
L
Linus Torvalds 已提交
2450 2451
{ }

2452
static inline int security_sem_associate(struct sem_array *sma, int semflg)
L
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2453 2454 2455 2456
{
	return 0;
}

2457
static inline int security_sem_semctl(struct sem_array *sma, int cmd)
L
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2458 2459 2460 2461
{
	return 0;
}

2462 2463 2464
static inline int security_sem_semop(struct sem_array *sma,
				     struct sembuf *sops, unsigned nsops,
				     int alter)
L
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2465 2466 2467 2468
{
	return 0;
}

2469
static inline void security_d_instantiate(struct dentry *dentry, struct inode *inode)
L
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2470 2471
{ }

2472
static inline int security_getprocattr(struct task_struct *p, char *name, char **value)
L
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2473 2474 2475 2476 2477 2478 2479 2480 2481
{
	return -EINVAL;
}

static inline int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
{
	return -EINVAL;
}

2482
static inline int security_netlink_send(struct sock *sk, struct sk_buff *skb)
L
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2483
{
2484
	return cap_netlink_send(sk, skb);
L
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2485 2486
}

2487 2488 2489 2490 2491
static inline int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
{
	return -EOPNOTSUPP;
}

2492
static inline int security_secctx_to_secid(const char *secdata,
2493 2494 2495 2496 2497 2498
					   u32 seclen,
					   u32 *secid)
{
	return -EOPNOTSUPP;
}

2499 2500 2501
static inline void security_release_secctx(char *secdata, u32 seclen)
{
}
2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514

static inline int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
{
	return -EOPNOTSUPP;
}
static inline int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
{
	return -EOPNOTSUPP;
}
static inline int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
{
	return -EOPNOTSUPP;
}
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2515 2516 2517
#endif	/* CONFIG_SECURITY */

#ifdef CONFIG_SECURITY_NETWORK
2518

2519
int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk);
2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551
int security_unix_may_send(struct socket *sock,  struct socket *other);
int security_socket_create(int family, int type, int protocol, int kern);
int security_socket_post_create(struct socket *sock, int family,
				int type, int protocol, int kern);
int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen);
int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen);
int security_socket_listen(struct socket *sock, int backlog);
int security_socket_accept(struct socket *sock, struct socket *newsock);
int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size);
int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
			    int size, int flags);
int security_socket_getsockname(struct socket *sock);
int security_socket_getpeername(struct socket *sock);
int security_socket_getsockopt(struct socket *sock, int level, int optname);
int security_socket_setsockopt(struct socket *sock, int level, int optname);
int security_socket_shutdown(struct socket *sock, int how);
int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb);
int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
				      int __user *optlen, unsigned len);
int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid);
int security_sk_alloc(struct sock *sk, int family, gfp_t priority);
void security_sk_free(struct sock *sk);
void security_sk_clone(const struct sock *sk, struct sock *newsk);
void security_sk_classify_flow(struct sock *sk, struct flowi *fl);
void security_req_classify_flow(const struct request_sock *req, struct flowi *fl);
void security_sock_graft(struct sock*sk, struct socket *parent);
int security_inet_conn_request(struct sock *sk,
			struct sk_buff *skb, struct request_sock *req);
void security_inet_csk_clone(struct sock *newsk,
			const struct request_sock *req);
void security_inet_conn_established(struct sock *sk,
			struct sk_buff *skb);
2552 2553 2554
int security_secmark_relabel_packet(u32 secid);
void security_secmark_refcount_inc(void);
void security_secmark_refcount_dec(void);
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2555 2556 2557
int security_tun_dev_create(void);
void security_tun_dev_post_create(struct sock *sk);
int security_tun_dev_attach(struct sock *sk);
2558

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#else	/* CONFIG_SECURITY_NETWORK */
2560 2561
static inline int security_unix_stream_connect(struct sock *sock,
					       struct sock *other,
2562
					       struct sock *newsk)
L
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2563 2564 2565 2566
{
	return 0;
}

2567 2568
static inline int security_unix_may_send(struct socket *sock,
					 struct socket *other)
L
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2569 2570 2571 2572
{
	return 0;
}

2573 2574
static inline int security_socket_create(int family, int type,
					 int protocol, int kern)
L
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2575 2576 2577 2578
{
	return 0;
}

2579
static inline int security_socket_post_create(struct socket *sock,
V
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2580 2581 2582
					      int family,
					      int type,
					      int protocol, int kern)
L
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2583
{
V
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2584
	return 0;
L
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2585 2586
}

2587 2588
static inline int security_socket_bind(struct socket *sock,
				       struct sockaddr *address,
L
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2589 2590 2591 2592 2593
				       int addrlen)
{
	return 0;
}

2594 2595
static inline int security_socket_connect(struct socket *sock,
					  struct sockaddr *address,
L
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2596 2597 2598 2599 2600
					  int addrlen)
{
	return 0;
}

2601
static inline int security_socket_listen(struct socket *sock, int backlog)
L
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2602 2603 2604 2605
{
	return 0;
}

2606 2607
static inline int security_socket_accept(struct socket *sock,
					 struct socket *newsock)
L
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2608 2609 2610 2611
{
	return 0;
}

2612 2613
static inline int security_socket_sendmsg(struct socket *sock,
					  struct msghdr *msg, int size)
L
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2614 2615 2616 2617
{
	return 0;
}

2618 2619
static inline int security_socket_recvmsg(struct socket *sock,
					  struct msghdr *msg, int size,
L
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2620 2621 2622 2623 2624
					  int flags)
{
	return 0;
}

2625
static inline int security_socket_getsockname(struct socket *sock)
L
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2626 2627 2628 2629
{
	return 0;
}

2630
static inline int security_socket_getpeername(struct socket *sock)
L
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2631 2632 2633 2634
{
	return 0;
}

2635
static inline int security_socket_getsockopt(struct socket *sock,
L
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2636 2637 2638 2639 2640
					     int level, int optname)
{
	return 0;
}

2641
static inline int security_socket_setsockopt(struct socket *sock,
L
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2642 2643 2644 2645 2646
					     int level, int optname)
{
	return 0;
}

2647
static inline int security_socket_shutdown(struct socket *sock, int how)
L
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2648 2649 2650
{
	return 0;
}
2651 2652
static inline int security_sock_rcv_skb(struct sock *sk,
					struct sk_buff *skb)
L
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2653 2654 2655 2656
{
	return 0;
}

C
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2657 2658 2659 2660 2661 2662
static inline int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
						    int __user *optlen, unsigned len)
{
	return -ENOPROTOOPT;
}

2663
static inline int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
L
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2664 2665 2666 2667
{
	return -ENOPROTOOPT;
}

A
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2668
static inline int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
L
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2669 2670 2671 2672 2673
{
	return 0;
}

static inline void security_sk_free(struct sock *sk)
2674 2675 2676 2677
{
}

static inline void security_sk_clone(const struct sock *sk, struct sock *newsk)
L
Linus Torvalds 已提交
2678 2679
{
}
2680

V
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2681
static inline void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2682 2683
{
}
2684 2685 2686 2687 2688

static inline void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
{
}

2689
static inline void security_sock_graft(struct sock *sk, struct socket *parent)
2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702
{
}

static inline int security_inet_conn_request(struct sock *sk,
			struct sk_buff *skb, struct request_sock *req)
{
	return 0;
}

static inline void security_inet_csk_clone(struct sock *newsk,
			const struct request_sock *req)
{
}
2703 2704 2705 2706 2707

static inline void security_inet_conn_established(struct sock *sk,
			struct sk_buff *skb)
{
}
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2708

2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721
static inline int security_secmark_relabel_packet(u32 secid)
{
	return 0;
}

static inline void security_secmark_refcount_inc(void)
{
}

static inline void security_secmark_refcount_dec(void)
{
}

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2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734
static inline int security_tun_dev_create(void)
{
	return 0;
}

static inline void security_tun_dev_post_create(struct sock *sk)
{
}

static inline int security_tun_dev_attach(struct sock *sk)
{
	return 0;
}
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2735 2736
#endif	/* CONFIG_SECURITY_NETWORK */

2737
#ifdef CONFIG_SECURITY_NETWORK_XFRM
V
Venkat Yekkirala 已提交
2738

2739 2740 2741 2742
int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, struct xfrm_user_sec_ctx *sec_ctx);
int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, struct xfrm_sec_ctx **new_ctxp);
void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
2743 2744 2745 2746 2747
int security_xfrm_state_alloc(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx);
int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
				      struct xfrm_sec_ctx *polsec, u32 secid);
int security_xfrm_state_delete(struct xfrm_state *x);
void security_xfrm_state_free(struct xfrm_state *x);
2748
int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
2749
int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2750 2751
				       struct xfrm_policy *xp,
				       const struct flowi *fl);
2752 2753
int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid);
void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl);
V
Venkat Yekkirala 已提交
2754

2755
#else	/* CONFIG_SECURITY_NETWORK_XFRM */
2756

2757
static inline int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, struct xfrm_user_sec_ctx *sec_ctx)
2758 2759 2760 2761
{
	return 0;
}

2762
static inline int security_xfrm_policy_clone(struct xfrm_sec_ctx *old, struct xfrm_sec_ctx **new_ctxp)
2763 2764 2765 2766
{
	return 0;
}

2767
static inline void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2768 2769 2770
{
}

2771
static inline int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
C
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2772 2773 2774 2775
{
	return 0;
}

2776 2777 2778 2779 2780 2781 2782 2783
static inline int security_xfrm_state_alloc(struct xfrm_state *x,
					struct xfrm_user_sec_ctx *sec_ctx)
{
	return 0;
}

static inline int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
					struct xfrm_sec_ctx *polsec, u32 secid)
2784 2785 2786 2787 2788 2789 2790 2791
{
	return 0;
}

static inline void security_xfrm_state_free(struct xfrm_state *x)
{
}

2792
static inline int security_xfrm_state_delete(struct xfrm_state *x)
C
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2793 2794 2795 2796
{
	return 0;
}

2797
static inline int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2798 2799 2800
{
	return 0;
}
2801 2802

static inline int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2803
			struct xfrm_policy *xp, const struct flowi *fl)
2804 2805 2806 2807
{
	return 1;
}

V
Venkat Yekkirala 已提交
2808
static inline int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2809 2810 2811 2812
{
	return 0;
}

V
Venkat Yekkirala 已提交
2813 2814 2815 2816
static inline void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
{
}

2817 2818
#endif	/* CONFIG_SECURITY_NETWORK_XFRM */

2819 2820
#ifdef CONFIG_SECURITY_PATH
int security_path_unlink(struct path *dir, struct dentry *dentry);
A
Al Viro 已提交
2821
int security_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode);
2822
int security_path_rmdir(struct path *dir, struct dentry *dentry);
A
Al Viro 已提交
2823
int security_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
2824
			unsigned int dev);
2825
int security_path_truncate(struct path *path);
2826 2827 2828 2829 2830 2831
int security_path_symlink(struct path *dir, struct dentry *dentry,
			  const char *old_name);
int security_path_link(struct dentry *old_dentry, struct path *new_dir,
		       struct dentry *new_dentry);
int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
			 struct path *new_dir, struct dentry *new_dentry);
2832
int security_path_chmod(struct path *path, umode_t mode);
2833
int security_path_chown(struct path *path, uid_t uid, gid_t gid);
T
Tetsuo Handa 已提交
2834
int security_path_chroot(struct path *path);
2835 2836 2837 2838 2839 2840 2841
#else	/* CONFIG_SECURITY_PATH */
static inline int security_path_unlink(struct path *dir, struct dentry *dentry)
{
	return 0;
}

static inline int security_path_mkdir(struct path *dir, struct dentry *dentry,
A
Al Viro 已提交
2842
				      umode_t mode)
2843 2844 2845 2846 2847 2848 2849 2850 2851 2852
{
	return 0;
}

static inline int security_path_rmdir(struct path *dir, struct dentry *dentry)
{
	return 0;
}

static inline int security_path_mknod(struct path *dir, struct dentry *dentry,
A
Al Viro 已提交
2853
				      umode_t mode, unsigned int dev)
2854 2855 2856 2857
{
	return 0;
}

2858
static inline int security_path_truncate(struct path *path)
2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882
{
	return 0;
}

static inline int security_path_symlink(struct path *dir, struct dentry *dentry,
					const char *old_name)
{
	return 0;
}

static inline int security_path_link(struct dentry *old_dentry,
				     struct path *new_dir,
				     struct dentry *new_dentry)
{
	return 0;
}

static inline int security_path_rename(struct path *old_dir,
				       struct dentry *old_dentry,
				       struct path *new_dir,
				       struct dentry *new_dentry)
{
	return 0;
}
2883

2884
static inline int security_path_chmod(struct path *path, umode_t mode)
2885 2886 2887 2888 2889 2890 2891 2892
{
	return 0;
}

static inline int security_path_chown(struct path *path, uid_t uid, gid_t gid)
{
	return 0;
}
T
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2893 2894 2895 2896 2897

static inline int security_path_chroot(struct path *path)
{
	return 0;
}
2898 2899
#endif	/* CONFIG_SECURITY_PATH */

2900 2901 2902
#ifdef CONFIG_KEYS
#ifdef CONFIG_SECURITY

D
David Howells 已提交
2903
int security_key_alloc(struct key *key, const struct cred *cred, unsigned long flags);
2904 2905
void security_key_free(struct key *key);
int security_key_permission(key_ref_t key_ref,
D
David Howells 已提交
2906
			    const struct cred *cred, key_perm_t perm);
2907
int security_key_getsecurity(struct key *key, char **_buffer);
2908 2909 2910

#else

2911
static inline int security_key_alloc(struct key *key,
D
David Howells 已提交
2912
				     const struct cred *cred,
2913
				     unsigned long flags)
2914 2915 2916 2917 2918 2919 2920 2921 2922
{
	return 0;
}

static inline void security_key_free(struct key *key)
{
}

static inline int security_key_permission(key_ref_t key_ref,
D
David Howells 已提交
2923
					  const struct cred *cred,
2924 2925 2926 2927 2928
					  key_perm_t perm)
{
	return 0;
}

2929 2930 2931 2932
static inline int security_key_getsecurity(struct key *key, char **_buffer)
{
	*_buffer = NULL;
	return 0;
2933
}
2934

2935 2936 2937
#endif
#endif /* CONFIG_KEYS */

2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970
#ifdef CONFIG_AUDIT
#ifdef CONFIG_SECURITY
int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule);
int security_audit_rule_known(struct audit_krule *krule);
int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
			      struct audit_context *actx);
void security_audit_rule_free(void *lsmrule);

#else

static inline int security_audit_rule_init(u32 field, u32 op, char *rulestr,
					   void **lsmrule)
{
	return 0;
}

static inline int security_audit_rule_known(struct audit_krule *krule)
{
	return 0;
}

static inline int security_audit_rule_match(u32 secid, u32 field, u32 op,
				   void *lsmrule, struct audit_context *actx)
{
	return 0;
}

static inline void security_audit_rule_free(void *lsmrule)
{ }

#endif /* CONFIG_SECURITY */
#endif /* CONFIG_AUDIT */

2971 2972
#ifdef CONFIG_SECURITYFS

2973
extern struct dentry *securityfs_create_file(const char *name, umode_t mode,
2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987
					     struct dentry *parent, void *data,
					     const struct file_operations *fops);
extern struct dentry *securityfs_create_dir(const char *name, struct dentry *parent);
extern void securityfs_remove(struct dentry *dentry);

#else /* CONFIG_SECURITYFS */

static inline struct dentry *securityfs_create_dir(const char *name,
						   struct dentry *parent)
{
	return ERR_PTR(-ENODEV);
}

static inline struct dentry *securityfs_create_file(const char *name,
2988
						    umode_t mode,
2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000
						    struct dentry *parent,
						    void *data,
						    const struct file_operations *fops)
{
	return ERR_PTR(-ENODEV);
}

static inline void securityfs_remove(struct dentry *dentry)
{}

#endif

3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023
#ifdef CONFIG_SECURITY

static inline char *alloc_secdata(void)
{
	return (char *)get_zeroed_page(GFP_KERNEL);
}

static inline void free_secdata(void *secdata)
{
	free_page((unsigned long)secdata);
}

#else

static inline char *alloc_secdata(void)
{
        return (char *)1;
}

static inline void free_secdata(void *secdata)
{ }
#endif /* CONFIG_SECURITY */

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3024 3025
#endif /* ! __LINUX_SECURITY_H */