8e38aeff17
implement shm_open(2) and shm_unlink(2) in the kernel: - Each shared memory file descriptor is associated with a swap-backed vm object which provides the backing store. Each descriptor starts off with a size of zero, but the size can be altered via ftruncate(2). The shared memory file descriptors also support fstat(2). read(2), write(2), ioctl(2), select(2), poll(2), and kevent(2) are not supported on shared memory file descriptors. - shm_open(2) and shm_unlink(2) are now implemented as system calls that manage shared memory file descriptors. The virtual namespace that maps pathnames to shared memory file descriptors is implemented as a hash table where the hash key is generated via the 32-bit Fowler/Noll/Vo hash of the pathname. - As an extension, the constant 'SHM_ANON' may be specified in place of the path argument to shm_open(2). In this case, an unnamed shared memory file descriptor will be created similar to the IPC_PRIVATE key for shmget(2). Note that the shared memory object can still be shared among processes by sharing the file descriptor via fork(2) or sendmsg(2), but it is unnamed. This effectively serves to implement the getmemfd() idea bandied about the lists several times over the years. - The backing store for shared memory file descriptors are garbage collected when they are not referenced by any open file descriptors or the shm_open(2) virtual namespace. Submitted by: dillon, peter (previous versions) Submitted by: rwatson (I based this on his version) Reviewed by: alc (suggested converting getmemfd() to shm_open())
435 lines
19 KiB
C
435 lines
19 KiB
C
/*-
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* Copyright (c) 1999-2002, 2007 Robert N. M. Watson
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* Copyright (c) 2001-2005 Networks Associates Technology, Inc.
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* Copyright (c) 2005-2006 SPARTA, Inc.
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* All rights reserved.
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*
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* This software was developed by Robert Watson for the TrustedBSD Project.
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*
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* This software was developed for the FreeBSD Project in part by Network
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* Associates Laboratories, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
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* as part of the DARPA CHATS research program.
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*
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* This software was enhanced by SPARTA ISSO under SPAWAR contract
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* N66001-04-C-6019 ("SEFOS").
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Kernel interface for Mandatory Access Control -- how kernel services
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* interact with the TrustedBSD MAC Framework.
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*/
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#ifndef _SYS_SECURITY_MAC_MAC_FRAMEWORK_H_
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#define _SYS_SECURITY_MAC_MAC_FRAMEWORK_H_
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#ifndef _KERNEL
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#error "no user-serviceable parts inside"
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#endif
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struct auditinfo;
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struct auditinfo_addr;
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struct bpf_d;
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struct cdev;
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struct componentname;
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struct devfs_dirent;
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struct ifnet;
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struct ifreq;
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struct image_params;
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struct inpcb;
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struct ipq;
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struct ksem;
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struct label;
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struct m_tag;
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struct mac;
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struct mbuf;
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struct mount;
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struct msg;
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struct msqid_kernel;
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struct proc;
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struct semid_kernel;
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struct shmfd;
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struct shmid_kernel;
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struct sockaddr;
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struct socket;
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struct sysctl_oid;
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struct sysctl_req;
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struct pipepair;
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struct thread;
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struct timespec;
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struct ucred;
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struct uio;
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struct vattr;
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struct vnode;
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struct vop_setlabel_args;
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#include <sys/acl.h> /* XXX acl_type_t */
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/*
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* Entry points to the TrustedBSD MAC Framework from the remainder of the
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* kernel: entry points are named based on a principle object type and an
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* action relating to it. They are sorted alphabetically first by object
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* type and then action. In some situations, the principle object type is
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* obvious, and in other cases, less so as multiple objects may be inolved
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* in the operation.
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*/
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int mac_bpfdesc_check_receive(struct bpf_d *d, struct ifnet *ifp);
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void mac_bpfdesc_create(struct ucred *cred, struct bpf_d *d);
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void mac_bpfdesc_create_mbuf(struct bpf_d *d, struct mbuf *m);
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void mac_bpfdesc_destroy(struct bpf_d *);
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void mac_bpfdesc_init(struct bpf_d *);
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int mac_cred_check_visible(struct ucred *cr1, struct ucred *cr2);
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void mac_cred_copy(struct ucred *cr1, struct ucred *cr2);
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void mac_cred_destroy(struct ucred *);
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void mac_cred_init(struct ucred *);
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void mac_devfs_create_device(struct ucred *cred, struct mount *mp,
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struct cdev *dev, struct devfs_dirent *de);
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void mac_devfs_create_directory(struct mount *mp, char *dirname,
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int dirnamelen, struct devfs_dirent *de);
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void mac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
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struct devfs_dirent *dd, struct devfs_dirent *de);
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void mac_devfs_destroy(struct devfs_dirent *);
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void mac_devfs_init(struct devfs_dirent *);
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void mac_devfs_update(struct mount *mp, struct devfs_dirent *de,
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struct vnode *vp);
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void mac_devfs_vnode_associate(struct mount *mp, struct devfs_dirent *de,
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struct vnode *vp);
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int mac_ifnet_check_transmit(struct ifnet *ifp, struct mbuf *m);
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void mac_ifnet_create(struct ifnet *ifp);
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void mac_ifnet_create_mbuf(struct ifnet *ifp, struct mbuf *m);
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void mac_ifnet_destroy(struct ifnet *);
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void mac_ifnet_init(struct ifnet *);
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int mac_ifnet_ioctl_get(struct ucred *cred, struct ifreq *ifr,
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struct ifnet *ifp);
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int mac_ifnet_ioctl_set(struct ucred *cred, struct ifreq *ifr,
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struct ifnet *ifp);
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int mac_inpcb_check_deliver(struct inpcb *inp, struct mbuf *m);
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void mac_inpcb_create(struct socket *so, struct inpcb *inp);
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void mac_inpcb_create_mbuf(struct inpcb *inp, struct mbuf *m);
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void mac_inpcb_destroy(struct inpcb *);
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int mac_inpcb_init(struct inpcb *, int);
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void mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp);
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void mac_ipq_create(struct mbuf *m, struct ipq *ipq);
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void mac_ipq_destroy(struct ipq *);
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int mac_ipq_init(struct ipq *, int);
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int mac_ipq_match(struct mbuf *m, struct ipq *ipq);
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void mac_ipq_reassemble(struct ipq *ipq, struct mbuf *m);
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void mac_ipq_update(struct mbuf *m, struct ipq *ipq);
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int mac_kenv_check_dump(struct ucred *cred);
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int mac_kenv_check_get(struct ucred *cred, char *name);
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int mac_kenv_check_set(struct ucred *cred, char *name, char *value);
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int mac_kenv_check_unset(struct ucred *cred, char *name);
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int mac_kld_check_load(struct ucred *cred, struct vnode *vp);
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int mac_kld_check_stat(struct ucred *cred);
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void mac_mbuf_copy(struct mbuf *, struct mbuf *);
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int mac_mbuf_init(struct mbuf *, int);
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void mac_mbuf_tag_copy(struct m_tag *, struct m_tag *);
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void mac_mbuf_tag_destroy(struct m_tag *);
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int mac_mbuf_tag_init(struct m_tag *, int);
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int mac_mount_check_stat(struct ucred *cred, struct mount *mp);
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void mac_mount_create(struct ucred *cred, struct mount *mp);
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void mac_mount_destroy(struct mount *);
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void mac_mount_init(struct mount *);
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void mac_netatalk_aarp_send(struct ifnet *ifp, struct mbuf *m);
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void mac_netinet_arp_send(struct ifnet *ifp, struct mbuf *m);
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void mac_netinet_firewall_reply(struct mbuf *mrecv, struct mbuf *msend);
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void mac_netinet_firewall_send(struct mbuf *m);
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void mac_netinet_fragment(struct mbuf *m, struct mbuf *frag);
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void mac_netinet_icmp_reply(struct mbuf *mrecv, struct mbuf *msend);
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void mac_netinet_icmp_replyinplace(struct mbuf *m);
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void mac_netinet_igmp_send(struct ifnet *ifp, struct mbuf *m);
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void mac_netinet_tcp_reply(struct mbuf *m);
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void mac_netinet6_nd6_send(struct ifnet *ifp, struct mbuf *m);
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int mac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
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unsigned long cmd, void *data);
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int mac_pipe_check_poll(struct ucred *cred, struct pipepair *pp);
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int mac_pipe_check_read(struct ucred *cred, struct pipepair *pp);
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int mac_pipe_check_stat(struct ucred *cred, struct pipepair *pp);
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int mac_pipe_check_write(struct ucred *cred, struct pipepair *pp);
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void mac_pipe_create(struct ucred *cred, struct pipepair *pp);
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void mac_pipe_destroy(struct pipepair *);
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void mac_pipe_init(struct pipepair *);
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int mac_pipe_label_set(struct ucred *cred, struct pipepair *pp,
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struct label *label);
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int mac_posixsem_check_destroy(struct ucred *cred, struct ksem *ks);
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int mac_posixsem_check_getvalue(struct ucred *cred,struct ksem *ks);
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int mac_posixsem_check_open(struct ucred *cred, struct ksem *ks);
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int mac_posixsem_check_post(struct ucred *cred, struct ksem *ks);
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int mac_posixsem_check_unlink(struct ucred *cred, struct ksem *ks);
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int mac_posixsem_check_wait(struct ucred *cred, struct ksem *ks);
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void mac_posixsem_create(struct ucred *cred, struct ksem *ks);
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void mac_posixsem_destroy(struct ksem *);
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void mac_posixsem_init(struct ksem *);
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int mac_posixshm_check_mmap(struct ucred *cred, struct shmfd *shmfd,
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int prot, int flags);
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int mac_posixshm_check_open(struct ucred *cred, struct shmfd *shmfd);
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int mac_posixshm_check_stat(struct ucred *active_cred,
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struct ucred *file_cred, struct shmfd *shmfd);
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int mac_posixshm_check_truncate(struct ucred *active_cred,
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struct ucred *file_cred, struct shmfd *shmfd);
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int mac_posixshm_check_unlink(struct ucred *cred, struct shmfd *shmfd);
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void mac_posixshm_create(struct ucred *cred, struct shmfd *shmfd);
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void mac_posixshm_destroy(struct shmfd *);
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void mac_posixshm_init(struct shmfd *);
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int mac_priv_check(struct ucred *cred, int priv);
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int mac_priv_grant(struct ucred *cred, int priv);
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void mac_proc_associate_nfsd(struct ucred *cred);
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int mac_proc_check_debug(struct ucred *cred, struct proc *p);
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int mac_proc_check_sched(struct ucred *cred, struct proc *p);
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int mac_proc_check_setaudit(struct ucred *cred, struct auditinfo *ai);
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int mac_proc_check_setaudit_addr(struct ucred *cred,
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struct auditinfo_addr *aia);
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int mac_proc_check_setauid(struct ucred *cred, uid_t auid);
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int mac_proc_check_setegid(struct proc *p, struct ucred *cred,
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gid_t egid);
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int mac_proc_check_seteuid(struct proc *p, struct ucred *cred,
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uid_t euid);
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int mac_proc_check_setgid(struct proc *p, struct ucred *cred,
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gid_t gid);
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int mac_proc_check_setgroups(struct proc *p, struct ucred *cred,
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int ngroups, gid_t *gidset);
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int mac_proc_check_setregid(struct proc *p, struct ucred *cred,
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gid_t rgid, gid_t egid);
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int mac_proc_check_setresgid(struct proc *p, struct ucred *cred,
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gid_t rgid, gid_t egid, gid_t sgid);
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int mac_proc_check_setresuid(struct proc *p, struct ucred *cred,
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uid_t ruid, uid_t euid, uid_t suid);
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int mac_proc_check_setreuid(struct proc *p, struct ucred *cred,
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uid_t ruid, uid_t euid);
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int mac_proc_check_setuid(struct proc *p, struct ucred *cred,
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uid_t uid);
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int mac_proc_check_signal(struct ucred *cred, struct proc *p,
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int signum);
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int mac_proc_check_wait(struct ucred *cred, struct proc *p);
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void mac_proc_create_init(struct ucred *cred);
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void mac_proc_create_swapper(struct ucred *cred);
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void mac_proc_destroy(struct proc *);
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int mac_execve_enter(struct image_params *imgp, struct mac *mac_p);
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void mac_execve_exit(struct image_params *imgp);
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void mac_proc_init(struct proc *);
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int mac_socket_check_accept(struct ucred *cred, struct socket *so);
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int mac_socket_check_bind(struct ucred *cred, struct socket *so,
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struct sockaddr *sa);
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int mac_socket_check_connect(struct ucred *cred, struct socket *so,
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struct sockaddr *sa);
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int mac_socket_check_create(struct ucred *cred, int domain, int type,
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int proto);
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int mac_socket_check_deliver(struct socket *so, struct mbuf *m);
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int mac_socket_check_listen(struct ucred *cred, struct socket *so);
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int mac_socket_check_poll(struct ucred *cred, struct socket *so);
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int mac_socket_check_receive(struct ucred *cred, struct socket *so);
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int mac_socket_check_send(struct ucred *cred, struct socket *so);
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int mac_socket_check_stat(struct ucred *cred, struct socket *so);
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int mac_socket_check_visible(struct ucred *cred, struct socket *so);
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void mac_socket_create_mbuf(struct socket *so, struct mbuf *m);
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void mac_socket_create(struct ucred *cred, struct socket *so);
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void mac_socket_destroy(struct socket *);
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int mac_socket_init(struct socket *, int);
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void mac_socket_newconn(struct socket *oldso, struct socket *newso);
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int mac_getsockopt_label(struct ucred *cred, struct socket *so,
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struct mac *extmac);
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int mac_getsockopt_peerlabel(struct ucred *cred, struct socket *so,
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struct mac *extmac);
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int mac_setsockopt_label(struct ucred *cred, struct socket *so,
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struct mac *extmac);
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void mac_socketpeer_set_from_mbuf(struct mbuf *m, struct socket *so);
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void mac_socketpeer_set_from_socket(struct socket *oldso,
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struct socket *newso);
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void mac_syncache_create(struct label *l, struct inpcb *inp);
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void mac_syncache_create_mbuf(struct label *l, struct mbuf *m);
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void mac_syncache_destroy(struct label **l);
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int mac_syncache_init(struct label **l);
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int mac_system_check_acct(struct ucred *cred, struct vnode *vp);
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int mac_system_check_audit(struct ucred *cred, void *record, int length);
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int mac_system_check_auditctl(struct ucred *cred, struct vnode *vp);
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int mac_system_check_auditon(struct ucred *cred, int cmd);
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int mac_system_check_reboot(struct ucred *cred, int howto);
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int mac_system_check_swapon(struct ucred *cred, struct vnode *vp);
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int mac_system_check_swapoff(struct ucred *cred, struct vnode *vp);
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int mac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
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void *arg1, int arg2, struct sysctl_req *req);
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void mac_sysvmsg_cleanup(struct msg *msgptr);
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void mac_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
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struct msg *msgptr);
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void mac_sysvmsg_destroy(struct msg *);
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void mac_sysvmsg_init(struct msg *);
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int mac_sysvmsq_check_msgmsq(struct ucred *cred, struct msg *msgptr,
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struct msqid_kernel *msqkptr);
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int mac_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr);
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int mac_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr);
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int mac_sysvmsq_check_msqctl(struct ucred *cred,
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struct msqid_kernel *msqkptr, int cmd);
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int mac_sysvmsq_check_msqget(struct ucred *cred,
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struct msqid_kernel *msqkptr);
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int mac_sysvmsq_check_msqrcv(struct ucred *cred,
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struct msqid_kernel *msqkptr);
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int mac_sysvmsq_check_msqsnd(struct ucred *cred,
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struct msqid_kernel *msqkptr);
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void mac_sysvmsq_cleanup(struct msqid_kernel *msqkptr);
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void mac_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr);
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void mac_sysvmsq_destroy(struct msqid_kernel *);
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void mac_sysvmsq_init(struct msqid_kernel *);
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int mac_sysvsem_check_semctl(struct ucred *cred,
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struct semid_kernel *semakptr, int cmd);
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int mac_sysvsem_check_semget(struct ucred *cred,
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struct semid_kernel *semakptr);
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int mac_sysvsem_check_semop(struct ucred *cred,
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struct semid_kernel *semakptr, size_t accesstype);
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void mac_sysvsem_cleanup(struct semid_kernel *semakptr);
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void mac_sysvsem_create(struct ucred *cred,
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struct semid_kernel *semakptr);
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void mac_sysvsem_destroy(struct semid_kernel *);
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void mac_sysvsem_init(struct semid_kernel *);
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int mac_sysvshm_check_shmat(struct ucred *cred,
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struct shmid_kernel *shmsegptr, int shmflg);
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int mac_sysvshm_check_shmctl(struct ucred *cred,
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struct shmid_kernel *shmsegptr, int cmd);
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int mac_sysvshm_check_shmdt(struct ucred *cred,
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struct shmid_kernel *shmsegptr);
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int mac_sysvshm_check_shmget(struct ucred *cred,
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struct shmid_kernel *shmsegptr, int shmflg);
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void mac_sysvshm_cleanup(struct shmid_kernel *shmsegptr);
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void mac_sysvshm_create(struct ucred *cred,
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struct shmid_kernel *shmsegptr);
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void mac_sysvshm_destroy(struct shmid_kernel *);
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void mac_sysvshm_init(struct shmid_kernel *);
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void mac_thread_userret(struct thread *td);
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int mac_vnode_associate_extattr(struct mount *mp, struct vnode *vp);
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void mac_vnode_associate_singlelabel(struct mount *mp, struct vnode *vp);
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int mac_vnode_check_access(struct ucred *cred, struct vnode *vp,
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int acc_mode);
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int mac_vnode_check_chdir(struct ucred *cred, struct vnode *dvp);
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int mac_vnode_check_chroot(struct ucred *cred, struct vnode *dvp);
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int mac_vnode_check_create(struct ucred *cred, struct vnode *dvp,
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struct componentname *cnp, struct vattr *vap);
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int mac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
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acl_type_t type);
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int mac_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
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int attrnamespace, const char *name);
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int mac_vnode_check_exec(struct ucred *cred, struct vnode *vp,
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struct image_params *imgp);
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int mac_vnode_check_getacl(struct ucred *cred, struct vnode *vp,
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acl_type_t type);
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int mac_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
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int attrnamespace, const char *name, struct uio *uio);
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int mac_vnode_check_link(struct ucred *cred, struct vnode *dvp,
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|
struct vnode *vp, struct componentname *cnp);
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int mac_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
|
|
int attrnamespace);
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int mac_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
|
|
struct componentname *cnp);
|
|
int mac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, int prot,
|
|
int flags);
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|
int mac_vnode_check_mprotect(struct ucred *cred, struct vnode *vp,
|
|
int prot);
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|
int mac_vnode_check_open(struct ucred *cred, struct vnode *vp,
|
|
int acc_mode);
|
|
int mac_vnode_check_poll(struct ucred *active_cred,
|
|
struct ucred *file_cred, struct vnode *vp);
|
|
int mac_vnode_check_read(struct ucred *active_cred,
|
|
struct ucred *file_cred, struct vnode *vp);
|
|
int mac_vnode_check_readdir(struct ucred *cred, struct vnode *vp);
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|
int mac_vnode_check_readlink(struct ucred *cred, struct vnode *vp);
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|
int mac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, struct componentname *cnp);
|
|
int mac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, int samedir, struct componentname *cnp);
|
|
int mac_vnode_check_revoke(struct ucred *cred, struct vnode *vp);
|
|
int mac_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
|
|
acl_type_t type, struct acl *acl);
|
|
int mac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
|
|
int attrnamespace, const char *name, struct uio *uio);
|
|
int mac_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
|
|
u_long flags);
|
|
int mac_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
|
|
mode_t mode);
|
|
int mac_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
|
|
uid_t uid, gid_t gid);
|
|
int mac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
|
|
struct timespec atime, struct timespec mtime);
|
|
int mac_vnode_check_stat(struct ucred *active_cred,
|
|
struct ucred *file_cred, struct vnode *vp);
|
|
int mac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, struct componentname *cnp);
|
|
int mac_vnode_check_write(struct ucred *active_cred,
|
|
struct ucred *file_cred, struct vnode *vp);
|
|
void mac_vnode_copy_label(struct label *, struct label *);
|
|
void mac_vnode_init(struct vnode *);
|
|
int mac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
|
|
struct vnode *dvp, struct vnode *vp, struct componentname *cnp);
|
|
void mac_vnode_destroy(struct vnode *);
|
|
void mac_vnode_execve_transition(struct ucred *oldcred,
|
|
struct ucred *newcred, struct vnode *vp,
|
|
struct label *interpvplabel, struct image_params *imgp);
|
|
int mac_vnode_execve_will_transition(struct ucred *cred,
|
|
struct vnode *vp, struct label *interpvplabel,
|
|
struct image_params *imgp);
|
|
void mac_vnode_relabel(struct ucred *cred, struct vnode *vp,
|
|
struct label *newlabel);
|
|
|
|
struct label *mac_cred_label_alloc(void);
|
|
void mac_cred_label_free(struct label *);
|
|
struct label *mac_vnode_label_alloc(void);
|
|
void mac_vnode_label_free(struct label *);
|
|
|
|
void mac_cred_mmapped_drop_perms(struct thread *td, struct ucred *cred);
|
|
|
|
/*
|
|
* Calls to help various file systems implement labeling functionality using
|
|
* their existing EA implementation.
|
|
*/
|
|
int vop_stdsetlabel_ea(struct vop_setlabel_args *ap);
|
|
|
|
#endif /* !_SYS_SECURITY_MAC_MAC_FRAMEWORK_H_ */
|