| sysv_shm.c (220388) | sysv_shm.c (220398) |
|---|---|
| 1/* $NetBSD: sysv_shm.c,v 1.23 1994/07/04 23:25:12 glass Exp $ */ 2/*- 3 * Copyright (c) 1994 Adam Glass and Charles Hannum. All rights reserved. 4 * 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 --- 46 unchanged lines hidden (view full) --- 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62#include <sys/cdefs.h> | 1/* $NetBSD: sysv_shm.c,v 1.23 1994/07/04 23:25:12 glass Exp $ */ 2/*- 3 * Copyright (c) 1994 Adam Glass and Charles Hannum. All rights reserved. 4 * 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 --- 46 unchanged lines hidden (view full) --- 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62#include <sys/cdefs.h> |
| 63__FBSDID("$FreeBSD: head/sys/kern/sysv_shm.c 220388 2011-04-06 16:59:54Z trasz $"); | 63__FBSDID("$FreeBSD: head/sys/kern/sysv_shm.c 220398 2011-04-06 18:11:24Z trasz $"); |
| 64 65#include "opt_compat.h" 66#include "opt_sysvipc.h" 67 68#include <sys/param.h> 69#include <sys/systm.h> 70#include <sys/kernel.h> 71#include <sys/limits.h> 72#include <sys/lock.h> 73#include <sys/sysctl.h> 74#include <sys/shm.h> 75#include <sys/proc.h> 76#include <sys/malloc.h> 77#include <sys/mman.h> 78#include <sys/module.h> 79#include <sys/mutex.h> | 64 65#include "opt_compat.h" 66#include "opt_sysvipc.h" 67 68#include <sys/param.h> 69#include <sys/systm.h> 70#include <sys/kernel.h> 71#include <sys/limits.h> 72#include <sys/lock.h> 73#include <sys/sysctl.h> 74#include <sys/shm.h> 75#include <sys/proc.h> 76#include <sys/malloc.h> 77#include <sys/mman.h> 78#include <sys/module.h> 79#include <sys/mutex.h> |
| 80#include <sys/racct.h> |
|
| 80#include <sys/resourcevar.h> 81#include <sys/stat.h> 82#include <sys/syscall.h> 83#include <sys/syscallsubr.h> 84#include <sys/sysent.h> 85#include <sys/sysproto.h> 86#include <sys/jail.h> 87 --- 153 unchanged lines hidden (view full) --- 241 shmseg->object = NULL; 242 size = round_page(shmseg->u.shm_segsz); 243 shm_committed -= btoc(size); 244 shm_nused--; 245 shmseg->u.shm_perm.mode = SHMSEG_FREE; 246#ifdef MAC 247 mac_sysvshm_cleanup(shmseg); 248#endif | 81#include <sys/resourcevar.h> 82#include <sys/stat.h> 83#include <sys/syscall.h> 84#include <sys/syscallsubr.h> 85#include <sys/sysent.h> 86#include <sys/sysproto.h> 87#include <sys/jail.h> 88 --- 153 unchanged lines hidden (view full) --- 242 shmseg->object = NULL; 243 size = round_page(shmseg->u.shm_segsz); 244 shm_committed -= btoc(size); 245 shm_nused--; 246 shmseg->u.shm_perm.mode = SHMSEG_FREE; 247#ifdef MAC 248 mac_sysvshm_cleanup(shmseg); 249#endif |
| 250 racct_sub_cred(shmseg->cred, RACCT_NSHM, 1); 251 racct_sub_cred(shmseg->cred, RACCT_SHMSIZE, size); |
|
| 249 crfree(shmseg->cred); 250 shmseg->cred = NULL; 251} 252 253static int 254shm_delete_mapping(struct vmspace *vm, struct shmmap_state *shmmap_s) 255{ 256 struct shmid_kernel *shmseg; --- 407 unchanged lines hidden (view full) --- 664 if (i == shmalloced) 665 return (ENOSPC); 666 segnum = i; 667 } else { 668 segnum = shm_last_free; 669 shm_last_free = -1; 670 } 671 shmseg = &shmsegs[segnum]; | 252 crfree(shmseg->cred); 253 shmseg->cred = NULL; 254} 255 256static int 257shm_delete_mapping(struct vmspace *vm, struct shmmap_state *shmmap_s) 258{ 259 struct shmid_kernel *shmseg; --- 407 unchanged lines hidden (view full) --- 667 if (i == shmalloced) 668 return (ENOSPC); 669 segnum = i; 670 } else { 671 segnum = shm_last_free; 672 shm_last_free = -1; 673 } 674 shmseg = &shmsegs[segnum]; |
| 675 PROC_LOCK(td->td_proc); 676 if (racct_add(td->td_proc, RACCT_NSHM, 1)) { 677 PROC_UNLOCK(td->td_proc); 678 return (ENOSPC); 679 } 680 if (racct_add(td->td_proc, RACCT_SHMSIZE, size)) { 681 racct_sub(td->td_proc, RACCT_NSHM, 1); 682 PROC_UNLOCK(td->td_proc); 683 return (ENOMEM); 684 } 685 PROC_UNLOCK(td->td_proc); |
|
| 672 /* 673 * In case we sleep in malloc(), mark the segment present but deleted 674 * so that noone else tries to create the same key. 675 */ 676 shmseg->u.shm_perm.mode = SHMSEG_ALLOCATED | SHMSEG_REMOVED; 677 shmseg->u.shm_perm.key = uap->key; 678 shmseg->u.shm_perm.seq = (shmseg->u.shm_perm.seq + 1) & 0x7fff; 679 shmid = IXSEQ_TO_IPCID(segnum, shmseg->u.shm_perm); 680 681 /* 682 * We make sure that we have allocated a pager before we need 683 * to. 684 */ 685 shm_object = vm_pager_allocate(shm_use_phys ? OBJT_PHYS : OBJT_SWAP, 686 0, size, VM_PROT_DEFAULT, 0, cred); | 686 /* 687 * In case we sleep in malloc(), mark the segment present but deleted 688 * so that noone else tries to create the same key. 689 */ 690 shmseg->u.shm_perm.mode = SHMSEG_ALLOCATED | SHMSEG_REMOVED; 691 shmseg->u.shm_perm.key = uap->key; 692 shmseg->u.shm_perm.seq = (shmseg->u.shm_perm.seq + 1) & 0x7fff; 693 shmid = IXSEQ_TO_IPCID(segnum, shmseg->u.shm_perm); 694 695 /* 696 * We make sure that we have allocated a pager before we need 697 * to. 698 */ 699 shm_object = vm_pager_allocate(shm_use_phys ? OBJT_PHYS : OBJT_SWAP, 700 0, size, VM_PROT_DEFAULT, 0, cred); |
| 687 if (shm_object == NULL) | 701 if (shm_object == NULL) { 702 PROC_LOCK(td->td_proc); 703 racct_sub(td->td_proc, RACCT_NSHM, 1); 704 racct_sub(td->td_proc, RACCT_SHMSIZE, size); 705 PROC_UNLOCK(td->td_proc); |
| 688 return (ENOMEM); | 706 return (ENOMEM); |
| 707 } |
|
| 689 VM_OBJECT_LOCK(shm_object); 690 vm_object_clear_flag(shm_object, OBJ_ONEMAPPING); 691 vm_object_set_flag(shm_object, OBJ_NOSPLIT); 692 VM_OBJECT_UNLOCK(shm_object); 693 694 shmseg->object = shm_object; 695 shmseg->u.shm_perm.cuid = shmseg->u.shm_perm.uid = cred->cr_uid; 696 shmseg->u.shm_perm.cgid = shmseg->u.shm_perm.gid = cred->cr_gid; --- 690 unchanged lines hidden --- | 708 VM_OBJECT_LOCK(shm_object); 709 vm_object_clear_flag(shm_object, OBJ_ONEMAPPING); 710 vm_object_set_flag(shm_object, OBJ_NOSPLIT); 711 VM_OBJECT_UNLOCK(shm_object); 712 713 shmseg->object = shm_object; 714 shmseg->u.shm_perm.cuid = shmseg->u.shm_perm.uid = cred->cr_uid; 715 shmseg->u.shm_perm.cgid = shmseg->u.shm_perm.gid = cred->cr_gid; --- 690 unchanged lines hidden --- |