uipc_shm.c (2a016de1a5abdf87ae6e00f879a3600d157a8ca2) uipc_shm.c (15bcf785ba268a1fb2b270233a7ae56d9e0ebc3a)
1/*-
1/*-
2 * Copyright (c) 2006, 2011 Robert N. M. Watson
2 * Copyright (c) 2006, 2011, 2016-2017 Robert N. M. Watson
3 * All rights reserved.
4 *
3 * All rights reserved.
4 *
5 * Portions of this software were developed by BAE Systems, the University of
6 * Cambridge Computer Laboratory, and Memorial University under DARPA/AFRL
7 * contract FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent
8 * Computing (TC) research program.
9 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.

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74#include <sys/sysproto.h>
75#include <sys/systm.h>
76#include <sys/sx.h>
77#include <sys/time.h>
78#include <sys/vnode.h>
79#include <sys/unistd.h>
80#include <sys/user.h>
81
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.

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79#include <sys/sysproto.h>
80#include <sys/systm.h>
81#include <sys/sx.h>
82#include <sys/time.h>
83#include <sys/vnode.h>
84#include <sys/unistd.h>
85#include <sys/user.h>
86
87#include <security/audit/audit.h>
82#include <security/mac/mac_framework.h>
83
84#include <vm/vm.h>
85#include <vm/vm_param.h>
86#include <vm/pmap.h>
87#include <vm/vm_extern.h>
88#include <vm/vm_map.h>
89#include <vm/vm_kern.h>

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704#ifdef CAPABILITY_MODE
705 /*
706 * shm_open(2) is only allowed for anonymous objects.
707 */
708 if (IN_CAPABILITY_MODE(td) && (userpath != SHM_ANON))
709 return (ECAPMODE);
710#endif
711
88#include <security/mac/mac_framework.h>
89
90#include <vm/vm.h>
91#include <vm/vm_param.h>
92#include <vm/pmap.h>
93#include <vm/vm_extern.h>
94#include <vm/vm_map.h>
95#include <vm/vm_kern.h>

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710#ifdef CAPABILITY_MODE
711 /*
712 * shm_open(2) is only allowed for anonymous objects.
713 */
714 if (IN_CAPABILITY_MODE(td) && (userpath != SHM_ANON))
715 return (ECAPMODE);
716#endif
717
718 AUDIT_ARG_FFLAGS(flags);
719 AUDIT_ARG_MODE(mode);
720
712 if ((flags & O_ACCMODE) != O_RDONLY && (flags & O_ACCMODE) != O_RDWR)
713 return (EINVAL);
714
715 if ((flags & ~(O_ACCMODE | O_CREAT | O_EXCL | O_TRUNC | O_CLOEXEC)) != 0)
716 return (EINVAL);
717
718 fdp = td->td_proc->p_fd;
719 cmode = (mode & ~fdp->fd_cmask) & ACCESSPERMS;

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749 error = EINVAL;
750 if (error) {
751 fdclose(td, fp, fd);
752 fdrop(fp, td);
753 free(path, M_SHMFD);
754 return (error);
755 }
756
721 if ((flags & O_ACCMODE) != O_RDONLY && (flags & O_ACCMODE) != O_RDWR)
722 return (EINVAL);
723
724 if ((flags & ~(O_ACCMODE | O_CREAT | O_EXCL | O_TRUNC | O_CLOEXEC)) != 0)
725 return (EINVAL);
726
727 fdp = td->td_proc->p_fd;
728 cmode = (mode & ~fdp->fd_cmask) & ACCESSPERMS;

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758 error = EINVAL;
759 if (error) {
760 fdclose(td, fp, fd);
761 fdrop(fp, td);
762 free(path, M_SHMFD);
763 return (error);
764 }
765
766 AUDIT_ARG_UPATH1_CANON(path);
757 fnv = fnv_32_str(path, FNV1_32_INIT);
758 sx_xlock(&shm_dict_lock);
759 shmfd = shm_lookup(path, fnv);
760 if (shmfd == NULL) {
761 /* Object does not yet exist, create it if requested. */
762 if (flags & O_CREAT) {
763#ifdef MAC
764 error = mac_posixshm_check_create(td->td_ucred,

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853 if (error) {
854 free(path, M_TEMP);
855 return (error);
856 }
857#ifdef KTRACE
858 if (KTRPOINT(curthread, KTR_NAMEI))
859 ktrnamei(path);
860#endif
767 fnv = fnv_32_str(path, FNV1_32_INIT);
768 sx_xlock(&shm_dict_lock);
769 shmfd = shm_lookup(path, fnv);
770 if (shmfd == NULL) {
771 /* Object does not yet exist, create it if requested. */
772 if (flags & O_CREAT) {
773#ifdef MAC
774 error = mac_posixshm_check_create(td->td_ucred,

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863 if (error) {
864 free(path, M_TEMP);
865 return (error);
866 }
867#ifdef KTRACE
868 if (KTRPOINT(curthread, KTR_NAMEI))
869 ktrnamei(path);
870#endif
871 AUDIT_ARG_UPATH1_CANON(path);
861 fnv = fnv_32_str(path, FNV1_32_INIT);
862 sx_xlock(&shm_dict_lock);
863 error = shm_remove(path, fnv, td->td_ucred);
864 sx_xunlock(&shm_dict_lock);
865 free(path, M_TEMP);
866
867 return (error);
868}

--- 245 unchanged lines hidden --- 		872 fnv = fnv_32_str(path, FNV1_32_INIT);
873 sx_xlock(&shm_dict_lock);
874 error = shm_remove(path, fnv, td->td_ucred);
875 sx_xunlock(&shm_dict_lock);
876 free(path, M_TEMP);
877
878 return (error);
879}

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