/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* Created for MacOSX
*
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/vnode.h>
+#include <sys/vnode_internal.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/sysproto.h>
-
+#include <sys/proc_info.h>
#include <bsm/audit_kernel.h>
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
+
#include <mach/mach_types.h>
#include <mach/mach_vm.h>
#include <mach/vm_map.h>
#include <vm/vm_map.h>
#include <vm/vm_protos.h>
-#include <vm/vm_shared_memory_server.h>
-
-#if KTRACE
-#include <sys/ktrace.h>
-#endif
#define f_flag f_fglob->fg_flag
#define f_type f_fglob->fg_type
#if DIAGNOSTIC
unsigned int pshm_readcount;
unsigned int pshm_writecount;
- struct proc * pshm_proc;
+ proc_t pshm_proc;
#endif /* DIAGNOSTIC */
+ struct label* pshm_label;
};
#define PSHMINFO_NULL (struct pshminfo *)0
struct pshmstats pshmstats; /* cache effectiveness statistics */
static int pshm_read (struct fileproc *fp, struct uio *uio,
- kauth_cred_t cred, int flags, struct proc *p);
+ int flags, vfs_context_t ctx);
static int pshm_write (struct fileproc *fp, struct uio *uio,
- kauth_cred_t cred, int flags, struct proc *p);
+ int flags, vfs_context_t ctx);
static int pshm_ioctl (struct fileproc *fp, u_long com,
- caddr_t data, struct proc *p);
-static int pshm_select (struct fileproc *fp, int which, void *wql, struct proc *p);
+ caddr_t data, vfs_context_t ctx);
+static int pshm_select (struct fileproc *fp, int which, void *wql, vfs_context_t ctx);
static int pshm_close(struct pshmnode *pnode);
-static int pshm_closefile (struct fileglob *fg, struct proc *p);
+static int pshm_closefile (struct fileglob *fg, vfs_context_t ctx);
-static int pshm_kqfilter(struct fileproc *fp, struct knote *kn, struct proc *p);
+static int pshm_kqfilter(struct fileproc *fp, struct knote *kn, vfs_context_t ctx);
-int pshm_access(struct pshminfo *pinfo, int mode, kauth_cred_t cred, struct proc *p);
+int pshm_access(struct pshminfo *pinfo, int mode, kauth_cred_t cred, proc_t p);
static int pshm_cache_add(struct pshminfo *pshmp, struct pshmname *pnp, struct pshmcache *pcp);
static void pshm_cache_delete(struct pshmcache *pcp);
#if NOT_USED
{
psx_shm_subsys_lck_grp_attr = lck_grp_attr_alloc_init();
- lck_grp_attr_setstat(psx_shm_subsys_lck_grp_attr);
psx_shm_subsys_lck_grp = lck_grp_alloc_init("posix shared memory", psx_shm_subsys_lck_grp_attr);
psx_shm_subsys_lck_attr = lck_attr_alloc_init();
- /* lck_attr_setdebug(psx_shm_subsys_lck_attr); */
lck_mtx_init(& psx_shm_subsys_mutex, psx_shm_subsys_lck_grp, psx_shm_subsys_lck_attr);
}
struct pshmcache *dpcp;
#if DIAGNOSTIC
- if (pnp->pshm_namelen > NCHNAMLEN)
+ if (pnp->pshm_namelen > PSHMNAMLEN)
panic("cache_enter: name too long");
#endif
void
pshm_cache_init(void)
{
- pshmhashtbl = hashinit(desiredvnodes, M_SHM, &pshmhash);
+ pshmhashtbl = hashinit(desiredvnodes / 8, M_SHM, &pshmhash);
}
#if NOT_USED
int
-shm_open(struct proc *p, struct shm_open_args *uap, register_t *retval)
+shm_open(proc_t p, struct shm_open_args *uap, register_t *retval)
{
struct fileproc *fp;
size_t i;
int incache = 0;
struct pshmnode * pnode = PSHMNODE_NULL;
struct pshmcache * pcache = PSHMCACHE_NULL;
- struct pshmcache *pcp;
+ struct pshmcache *pcp = NULL; /* protected by !incache */
int pinfo_alloc=0;
AUDIT_ARG(fflags, uap->oflag);
error = EINVAL;
goto bad;
}
- } else {
+ } else {
error = EINVAL;
goto bad;
}
nd.pshm_namelen = plen;
nd. pshm_hash =0;
- for (cp = nameptr, i=1; *cp != 0 && i <= plen; i++, cp++) {
- nd.pshm_hash += (unsigned char)*cp * i;
+ for (cp = nameptr, i=1; *cp != 0 && i <= plen; i++, cp++) {
+ nd.pshm_hash += (unsigned char)*cp * i;
}
-#if KTRACE
- if (KTRPOINT(p, KTR_NAMEI))
- ktrnamei(p->p_tracep, nameptr);
-#endif
-
PSHM_SUBSYS_LOCK();
error = pshm_cache_search(&pinfo, &nd, &pcache);
/*
* XXXXXXXXXX TBD XXXXXXXXXX
* There is a race that existed with the funnels as well.
- * Need to be fixed later
+ * Need to be fixed later
*/
PSHM_SUBSYS_UNLOCK();
- error = falloc(p, &nfp, &indx);
+ error = falloc(p, &nfp, &indx, vfs_context_current());
if (error )
goto bad;
PSHM_SUBSYS_LOCK();
if (fmode & O_CREAT) {
if ((fmode & O_EXCL) && incache) {
AUDIT_ARG(posix_ipc_perm, pinfo->pshm_uid,
- pinfo->pshm_gid, pinfo->pshm_mode);
+ pinfo->pshm_gid, pinfo->pshm_mode);
/* shm obj exists and opened O_EXCL */
#if notyet
- if (pinfo->pshm_flags & PSHM_INDELETE) {
- }
+ if (pinfo->pshm_flags & PSHM_INDELETE) {
+ }
#endif
- error = EEXIST;
- PSHM_SUBSYS_UNLOCK();
- goto bad1;
- }
- if (!incache) {
- PSHM_SUBSYS_UNLOCK();
- /* create a new one */
- MALLOC(pinfo, struct pshminfo *, sizeof(struct pshminfo), M_SHM, M_WAITOK|M_ZERO);
- if (pinfo == NULL) {
- error = ENOSPC;
- goto bad1;
- }
- PSHM_SUBSYS_LOCK();
- pinfo_alloc = 1;
- pinfo->pshm_flags = PSHM_DEFINED | PSHM_INCREATE;
- pinfo->pshm_usecount = 1; /* existence reference */
- pinfo->pshm_mode = cmode;
- pinfo->pshm_uid = kauth_cred_getuid(kauth_cred_get());
- pinfo->pshm_gid = kauth_cred_get()->cr_gid;
- } else {
- /* already exists */
- if( pinfo->pshm_flags & PSHM_INDELETE) {
- PSHM_SUBSYS_UNLOCK();
- error = ENOENT;
- goto bad1;
- }
- AUDIT_ARG(posix_ipc_perm, pinfo->pshm_uid,
- pinfo->pshm_gid, pinfo->pshm_mode);
- if ( (error = pshm_access(pinfo, fmode, kauth_cred_get(), p)) ) {
- PSHM_SUBSYS_UNLOCK();
- goto bad1;
- }
- }
+ error = EEXIST;
+ PSHM_SUBSYS_UNLOCK();
+ goto bad1;
+ }
+ if (!incache) {
+ PSHM_SUBSYS_UNLOCK();
+ /* create a new one */
+ MALLOC(pinfo, struct pshminfo *, sizeof(struct pshminfo), M_SHM, M_WAITOK|M_ZERO);
+ if (pinfo == NULL) {
+ error = ENOSPC;
+ goto bad1;
+ }
+ PSHM_SUBSYS_LOCK();
+ pinfo_alloc = 1;
+ pinfo->pshm_flags = PSHM_DEFINED | PSHM_INCREATE;
+ pinfo->pshm_usecount = 1; /* existence reference */
+ pinfo->pshm_mode = cmode;
+ pinfo->pshm_uid = kauth_cred_getuid(kauth_cred_get());
+ pinfo->pshm_gid = kauth_cred_get()->cr_gid;
+ bcopy(pnbuf, &pinfo->pshm_name[0], PSHMNAMLEN);
+ pinfo->pshm_name[PSHMNAMLEN]=0;
+#if CONFIG_MACF
+ PSHM_SUBSYS_UNLOCK();
+ mac_posixshm_label_init(pinfo);
+ PSHM_SUBSYS_LOCK();
+ error = mac_posixshm_check_create(kauth_cred_get(), nameptr);
+ if (error) {
+ PSHM_SUBSYS_UNLOCK();
+ goto bad2;
+ }
+ mac_posixshm_label_associate(kauth_cred_get(), pinfo, nameptr);
+#endif
+ } else {
+ /* already exists */
+ if( pinfo->pshm_flags & PSHM_INDELETE) {
+ PSHM_SUBSYS_UNLOCK();
+ error = ENOENT;
+ goto bad1;
+ }
+ AUDIT_ARG(posix_ipc_perm, pinfo->pshm_uid,
+ pinfo->pshm_gid, pinfo->pshm_mode);
+#if CONFIG_MACF
+ if ((error = mac_posixshm_check_open(
+ kauth_cred_get(), pinfo))) {
+ PSHM_SUBSYS_UNLOCK();
+ goto bad1;
+ }
+#endif
+ if ( (error = pshm_access(pinfo, fmode, kauth_cred_get(), p)) ) {
+ PSHM_SUBSYS_UNLOCK();
+ goto bad1;
+ }
+ }
} else {
if (!incache) {
/* O_CREAT is not set and the shm obecj does not exist */
error = ENOENT;
goto bad1;
}
+#if CONFIG_MACF
+ if ((error = mac_posixshm_check_open(
+ kauth_cred_get(), pinfo))) {
+ PSHM_SUBSYS_UNLOCK();
+ goto bad1;
+ }
+#endif
+
if ( (error = pshm_access(pinfo, fmode, kauth_cred_get(), p)) ) {
PSHM_SUBSYS_UNLOCK();
goto bad1;
}
if (!incache) {
/*
- * We allocate a new entry if we are less than the maximum
- * allowed and the one at the front of the LRU list is in use.
- * Otherwise we use the one at the front of the LRU list.
- */
+ * We allocate a new entry if we are less than the maximum
+ * allowed and the one at the front of the LRU list is in use.
+ * Otherwise we use the one at the front of the LRU list.
+ */
MALLOC(pcp, struct pshmcache *, sizeof(struct pshmcache), M_SHM, M_WAITOK|M_ZERO);
if (pcp == NULL) {
error = ENOSPC;
fp->f_type = DTYPE_PSXSHM;
fp->f_ops = &pshmops;
fp->f_data = (caddr_t)pnode;
- *fdflags(p, indx) &= ~UF_RESERVED;
+ *fdflags(p, indx) |= UF_EXCLOSE;
+ procfdtbl_releasefd(p, indx, NULL);
fp_drop(p, indx, fp, 1);
proc_fdunlock(p);
return (0);
bad3:
FREE(pnode, M_SHM);
-
+
bad2:
- if (pinfo_alloc)
+ if (pinfo_alloc) {
+#if CONFIG_MACF
+ mac_posixshm_label_destroy(pinfo);
+#endif
FREE(pinfo, M_SHM);
+ }
bad1:
fp_free(p, indx, fp);
bad:
int
-pshm_truncate(__unused struct proc *p, struct fileproc *fp, __unused int fd,
+pshm_truncate(__unused proc_t p, struct fileproc *fp, __unused int fd,
off_t length, __unused register_t *retval)
{
struct pshminfo * pinfo;
struct pshmnode * pnode ;
kern_return_t kret;
- vm_offset_t user_addr;
+ mach_vm_offset_t user_addr;
mem_entry_name_port_t mem_object;
- vm_size_t size;
+ mach_vm_size_t size;
+#if CONFIG_MACF
+ int error;
+#endif
if (fp->f_type != DTYPE_PSXSHM) {
return(EINVAL);
PSHM_SUBSYS_UNLOCK();
return(EINVAL);
}
-
+#if CONFIG_MACF
+ error = mac_posixshm_check_truncate(kauth_cred_get(), pinfo, size);
+ if (error) {
+ PSHM_SUBSYS_UNLOCK();
+ return(error);
+ }
+#endif
PSHM_SUBSYS_UNLOCK();
size = round_page_64(length);
- kret = vm_allocate(current_map(), &user_addr, size, VM_FLAGS_ANYWHERE);
+ kret = mach_vm_allocate(current_map(), &user_addr, size, VM_FLAGS_ANYWHERE);
if (kret != KERN_SUCCESS)
goto out;
- kret = mach_make_memory_entry (current_map(), &size,
+ kret = mach_make_memory_entry_64 (current_map(), &size,
user_addr, VM_PROT_DEFAULT, &mem_object, 0);
if (kret != KERN_SUCCESS)
goto out;
- vm_deallocate(current_map(), user_addr, size);
+ mach_vm_deallocate(current_map(), user_addr, size);
PSHM_SUBSYS_LOCK();
pinfo->pshm_flags &= ~PSHM_DEFINED;
}
int
-pshm_stat(struct pshmnode *pnode, struct stat *sb)
+pshm_stat(struct pshmnode *pnode, void *ub, int isstat64)
{
+ struct stat *sb = (struct stat *)0; /* warning avoidance ; protected by isstat64 */
+ struct stat64 * sb64 = (struct stat64 *)0; /* warning avoidance ; protected by isstat64 */
struct pshminfo *pinfo;
+#if CONFIG_MACF
+ int error;
+#endif
PSHM_SUBSYS_LOCK();
if ((pinfo = pnode->pinfo) == PSHMINFO_NULL){
return(EINVAL);
}
- bzero(sb, sizeof(struct stat));
- sb->st_mode = pinfo->pshm_mode;
- sb->st_uid = pinfo->pshm_uid;
- sb->st_gid = pinfo->pshm_gid;
- sb->st_size = pinfo->pshm_length;
+#if CONFIG_MACF
+ error = mac_posixshm_check_stat(kauth_cred_get(), pinfo);
+ if (error) {
+ PSHM_SUBSYS_UNLOCK();
+ return(error);
+ }
+#endif
+
+ if (isstat64 != 0) {
+ sb64 = (struct stat64 *)ub;
+ bzero(sb64, sizeof(struct stat64));
+ sb64->st_mode = pinfo->pshm_mode;
+ sb64->st_uid = pinfo->pshm_uid;
+ sb64->st_gid = pinfo->pshm_gid;
+ sb64->st_size = pinfo->pshm_length;
+ } else {
+ sb = (struct stat *)ub;
+ bzero(sb, sizeof(struct stat));
+ sb->st_mode = pinfo->pshm_mode;
+ sb->st_uid = pinfo->pshm_uid;
+ sb->st_gid = pinfo->pshm_gid;
+ sb->st_size = pinfo->pshm_length;
+ }
PSHM_SUBSYS_UNLOCK();
return(0);
* XXX This code is repeated many times
*/
int
-pshm_access(struct pshminfo *pinfo, int mode, kauth_cred_t cred, __unused struct proc *p)
+pshm_access(struct pshminfo *pinfo, int mode, kauth_cred_t cred, __unused proc_t p)
{
mode_t mask;
int is_member;
}
int
-pshm_mmap(struct proc *p, struct mmap_args *uap, user_addr_t *retval, struct fileproc *fp, off_t pageoff)
+pshm_mmap(__unused proc_t p, struct mmap_args *uap, user_addr_t *retval, struct fileproc *fp, off_t pageoff)
{
mach_vm_offset_t user_addr = (mach_vm_offset_t)uap->addr;
mach_vm_size_t user_size = (mach_vm_size_t)uap->len ;
int prot = uap->prot;
int flags = uap->flags;
vm_object_offset_t file_pos = (vm_object_offset_t)uap->pos;
- int fd = uap->fd;
vm_map_t user_map;
int alloc_flags;
boolean_t docow;
struct pshminfo * pinfo;
struct pshmnode * pnode;
void * mem_object;
+#if CONFIG_MACF
+ int error;
+#endif
if (user_size == 0)
return(0);
return(EINVAL);
}
+#if CONFIG_MACF
+ error = mac_posixshm_check_mmap(kauth_cred_get(), pinfo, prot, flags);
+ if (error) {
+ PSHM_SUBSYS_UNLOCK();
+ return(error);
+ }
+#endif
PSHM_SUBSYS_UNLOCK();
user_map = current_map();
}
docow = FALSE;
- kret = mach_vm_map(user_map, &user_addr, user_size,
- 0, alloc_flags, pinfo->pshm_memobject, file_pos, docow,
- prot, VM_PROT_DEFAULT,
- VM_INHERIT_SHARE);
+ kret = vm_map_enter_mem_object(user_map, &user_addr, user_size,
+ 0, alloc_flags,
+ pinfo->pshm_memobject, file_pos, docow,
+ prot, VM_PROT_DEFAULT,
+ VM_INHERIT_SHARE);
if (kret != KERN_SUCCESS)
goto out;
/* LP64todo - this should be superfluous at this point */
}
int
-shm_unlink(__unused struct proc *p, struct shm_unlink_args *uap,
+shm_unlink(__unused proc_t p, struct shm_unlink_args *uap,
__unused register_t *retval)
{
size_t i;
if ((pinfo->pshm_flags & (PSHM_DEFINED | PSHM_ALLOCATED))==0) {
PSHM_SUBSYS_UNLOCK();
- return (EINVAL);
+ error = EINVAL;
+ goto bad;
}
if (pinfo->pshm_flags & PSHM_INDELETE) {
error = 0;
goto bad;
}
+#if CONFIG_MACF
+ error = mac_posixshm_check_unlink(kauth_cred_get(), pinfo, nameptr);
+ if (error) {
+ PSHM_SUBSYS_UNLOCK();
+ goto bad;
+ }
+#endif
AUDIT_ARG(posix_ipc_perm, pinfo->pshm_uid, pinfo->pshm_gid,
pinfo->pshm_mode);
if (pinfo->pshm_memobject != NULL)
mach_memory_entry_port_release(pinfo->pshm_memobject);
PSHM_SUBSYS_LOCK();
+#if CONFIG_MACF
+ mac_posixshm_label_destroy(pinfo);
+#endif
FREE(pinfo,M_SHM);
}
FREE(pnode, M_SHM);
return (error);
}
-/* struct proc passed to match prototype for struct fileops */
+/* vfs_context_t passed to match prototype for struct fileops */
static int
-pshm_closefile(struct fileglob *fg, __unused struct proc *p)
+pshm_closefile(struct fileglob *fg, __unused vfs_context_t ctx)
{
int error;
static int
pshm_read(__unused struct fileproc *fp, __unused struct uio *uio,
- __unused kauth_cred_t cred, __unused int flags,
- __unused struct proc *p)
+ __unused int flags, __unused vfs_context_t ctx)
{
return(ENOTSUP);
}
static int
pshm_write(__unused struct fileproc *fp, __unused struct uio *uio,
- __unused kauth_cred_t cred, __unused int flags,
- __unused struct proc *p)
+ __unused int flags, __unused vfs_context_t ctx)
{
return(ENOTSUP);
}
static int
pshm_ioctl(__unused struct fileproc *fp, __unused u_long com,
- __unused caddr_t data, __unused struct proc *p)
+ __unused caddr_t data, __unused vfs_context_t ctx)
{
return(ENOTSUP);
}
static int
pshm_select(__unused struct fileproc *fp, __unused int which, __unused void *wql,
- __unused struct proc *p)
+ __unused vfs_context_t ctx)
{
return(ENOTSUP);
}
static int
pshm_kqfilter(__unused struct fileproc *fp, __unused struct knote *kn,
- __unused struct proc *p)
+ __unused vfs_context_t ctx)
{
return(ENOTSUP);
}
+
+int
+fill_pshminfo(struct pshmnode * pshm, struct pshm_info * info)
+{
+ struct pshminfo *pinfo;
+ struct vinfo_stat *sb;
+
+ PSHM_SUBSYS_LOCK();
+ if ((pinfo = pshm->pinfo) == PSHMINFO_NULL){
+ PSHM_SUBSYS_UNLOCK();
+ return(EINVAL);
+ }
+
+ sb = &info->pshm_stat;
+
+ bzero(sb, sizeof(struct vinfo_stat));
+ sb->vst_mode = pinfo->pshm_mode;
+ sb->vst_uid = pinfo->pshm_uid;
+ sb->vst_gid = pinfo->pshm_gid;
+ sb->vst_size = pinfo->pshm_length;
+
+ info->pshm_mappaddr = pshm->mapp_addr;
+ bcopy(&pinfo->pshm_name[0], &info->pshm_name[0], PSHMNAMLEN+1);
+
+ PSHM_SUBSYS_UNLOCK();
+ return(0);
+}
+
+#if CONFIG_MACF
+void
+pshm_label_associate(struct fileproc *fp, struct vnode *vp, vfs_context_t ctx)
+{
+ struct pshmnode *pnode;
+ struct pshminfo *pshm;
+
+ PSHM_SUBSYS_LOCK();
+ pnode = (struct pshmnode *)fp->f_fglob->fg_data;
+ if (pnode != NULL) {
+ pshm = pnode->pinfo;
+ if (pshm != NULL)
+ mac_posixshm_vnode_label_associate(
+ vfs_context_ucred(ctx), pshm, pshm->pshm_label,
+ vp, vp->v_label);
+ }
+ PSHM_SUBSYS_UNLOCK();
+}
+#endif
projects / apple / xnu.git / blobdiff