/*
- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
*
* @(#)vfs_init.c 8.5 (Berkeley) 5/11/95
*/
+/*
+ * 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/param.h>
-#include <sys/mount.h>
+#include <sys/mount_internal.h>
#include <sys/time.h>
#include <sys/vm.h>
-#include <sys/vnode.h>
+#include <sys/vnode_internal.h>
#include <sys/stat.h>
#include <sys/namei.h>
#include <sys/ucred.h>
-#include <sys/buf.h>
#include <sys/errno.h>
-#include <sys/malloc.h>
+#include <kern/kalloc.h>
+#include <sys/decmpfs.h>
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#include <sys/kauth.h>
+#endif
+#if QUOTA
+#include <sys/quota.h>
+#endif
/*
* Sigh, such primitive tools are these...
#define DODEBUG(A)
#endif
-extern uid_t console_user;
-extern struct vnodeopv_desc *vfs_opv_descs[];
- /* a list of lists of vnodeops defns */
+ZONE_DECLARE(mount_zone, "mount", sizeof(struct mount), ZC_ZFREE_CLEARMEM);
+
+__private_extern__ void vntblinit(void);
+
+extern const struct vnodeopv_desc *vfs_opv_descs[];
+/* a list of lists of vnodeops defns */
extern struct vnodeop_desc *vfs_op_descs[];
- /* and the operations they perform */
+/* and the operations they perform */
/*
* This code doesn't work if the defn is **vnodop_defns with cc.
* The problem is because of the compiler sometimes putting in an
*/
int vfs_opv_numops;
-typedef (*PFI)(); /* the standard Pointer to a Function returning an Int */
+typedef int (*PFIvp)(void *);
/*
* A miscellaneous routine.
* A generic "default" routine that just returns an error.
*/
int
-vn_default_error()
+vn_default_error(void)
{
-
- return (EOPNOTSUPP);
+ return ENOTSUP;
}
/*
* that is a(whole)nother story.) This is a feature.
*/
void
-vfs_opv_init()
+vfs_opv_init(void)
{
int i, j, k;
- int (***opv_desc_vector_p)(void *);
- int (**opv_desc_vector)(void *);
- struct vnodeopv_entry_desc *opve_descp;
+ int(***opv_desc_vector_p)(void *);
+ int(**opv_desc_vector)(void *);
+ const struct vnodeopv_entry_desc *opve_descp;
/*
* Allocate the dynamic vectors and fill them in.
*/
- for (i=0; vfs_opv_descs[i]; i++) {
+ for (i = 0; vfs_opv_descs[i]; i++) {
opv_desc_vector_p = vfs_opv_descs[i]->opv_desc_vector_p;
/*
* Allocate and init the vector, if it needs it.
* Also handle backwards compatibility.
*/
if (*opv_desc_vector_p == NULL) {
- MALLOC(*opv_desc_vector_p, PFI*,
- vfs_opv_numops*sizeof(PFI), M_TEMP, M_WAITOK);
- bzero (*opv_desc_vector_p, vfs_opv_numops*sizeof(PFI));
+ *opv_desc_vector_p = kheap_alloc(KHEAP_DEFAULT,
+ vfs_opv_numops * sizeof(PFIvp), Z_WAITOK | Z_ZERO);
DODEBUG(printf("vector at %x allocated\n",
opv_desc_vector_p));
}
opv_desc_vector = *opv_desc_vector_p;
- for (j=0; vfs_opv_descs[i]->opv_desc_ops[j].opve_op; j++) {
+ for (j = 0; vfs_opv_descs[i]->opv_desc_ops[j].opve_op; j++) {
opve_descp = &(vfs_opv_descs[i]->opv_desc_ops[j]);
+ /* Silently skip known-disabled operations */
+ if (opve_descp->opve_op->vdesc_flags & VDESC_DISABLED) {
+ printf("vfs_fsadd: Ignoring reference in %p to disabled operation %s.\n",
+ vfs_opv_descs[i], opve_descp->opve_op->vdesc_name);
+ continue;
+ }
+
/*
* Sanity check: is this operation listed
* in the list of operations? We check this
* list of supported operations.
*/
if (opve_descp->opve_op->vdesc_offset == 0 &&
- opve_descp->opve_op->vdesc_offset !=
- VOFFSET(vop_default)) {
+ opve_descp->opve_op !=
+ VDESC(vnop_default)) {
printf("operation %s not listed in %s.\n",
opve_descp->opve_op->vdesc_name,
"vfs_op_descs");
- panic ("vfs_opv_init: bad operation");
+ panic("vfs_opv_init: bad operation");
}
/*
* Fill in this entry.
*/
opv_desc_vector[opve_descp->opve_op->vdesc_offset] =
- opve_descp->opve_impl;
+ opve_descp->opve_impl;
}
}
/*
/*
* Force every operations vector to have a default routine.
*/
- if (opv_desc_vector[VOFFSET(vop_default)]==NULL) {
+ if (opv_desc_vector[VOFFSET(vnop_default)] == NULL) {
panic("vfs_opv_init: operation vector without default routine.");
}
- for (k = 0; k<vfs_opv_numops; k++)
- if (opv_desc_vector[k] == NULL)
- opv_desc_vector[k] =
- opv_desc_vector[VOFFSET(vop_default)];
+ for (k = 0; k < vfs_opv_numops; k++) {
+ if (opv_desc_vector[k] == NULL) {
+ opv_desc_vector[k] =
+ opv_desc_vector[VOFFSET(vnop_default)];
+ }
+ }
}
}
* Initialize known vnode operations vectors.
*/
void
-vfs_op_init()
+vfs_op_init(void)
{
int i;
/*
* Set all vnode vectors to a well known value.
*/
- for (i = 0; vfs_opv_descs[i]; i++)
+ for (i = 0; vfs_opv_descs[i]; i++) {
*(vfs_opv_descs[i]->opv_desc_vector_p) = NULL;
+ }
/*
* Figure out how many ops there are by counting the table,
* and assign each its offset.
*/
for (vfs_opv_numops = 0, i = 0; vfs_op_descs[i]; i++) {
+ /* Silently skip known-disabled operations */
+ if (vfs_op_descs[i]->vdesc_flags & VDESC_DISABLED) {
+ continue;
+ }
vfs_op_descs[i]->vdesc_offset = vfs_opv_numops;
vfs_opv_numops++;
}
- DODEBUG(printf ("vfs_opv_numops=%d\n", vfs_opv_numops));
+ DODEBUG(printf("vfs_opv_numops=%d\n", vfs_opv_numops));
}
/*
*/
extern struct vnodeops dead_vnodeops;
extern struct vnodeops spec_vnodeops;
-struct vattr va_null;
+
+/* vars for vnode list lock */
+static LCK_GRP_DECLARE(vnode_list_lck_grp, "vnode list");
+static LCK_ATTR_DECLARE(vnode_list_lck_attr, 0, 0);
+static LCK_SPIN_DECLARE_ATTR(vnode_list_spin_lock,
+ &vnode_list_lck_grp, &vnode_list_lck_attr);
+static LCK_MTX_DECLARE_ATTR(spechash_mtx_lock,
+ &vnode_list_lck_grp, &vnode_list_lck_attr);
+LCK_MTX_DECLARE_ATTR(pkg_extensions_lck,
+ &vnode_list_lck_grp, &vnode_list_lck_attr);
+
+/* vars for mount lock */
+static LCK_GRP_DECLARE(mnt_lck_grp, "mount");
+static LCK_ATTR_DECLARE(mnt_lck_attr, 0, 0);
+
+/* vars for mount list lock */
+static LCK_GRP_DECLARE(mnt_list_lck_grp, "mount list");
+LCK_MTX_DECLARE(mnt_list_mtx_lock, &mnt_list_lck_grp);
+
+struct mount * dead_mountp;
/*
* Initialize the vnode structures and initialize each file system type.
*/
-vfsinit()
+void
+vfsinit(void)
{
- struct vfsconf *vfsp;
+ struct vfstable *vfsp;
int i, maxtypenum;
+ struct mount * mp;
- /*
- * Initialize the "console user" for access purposes:
- */
- console_user = (uid_t)0;
-
/*
* Initialize the vnode table
*/
* Initialize the vnode name cache
*/
nchinit();
+
/*
* Build vnode operation vectors.
*/
* Initialize each file system type in the static list,
* until the first NULL ->vfs_vfsops is encountered.
*/
- vattr_null(&va_null);
- numused_vfsslots = maxtypenum = 0;
- for (vfsp = vfsconf, i = 0; i < maxvfsconf; i++, vfsp++) {
- if (vfsp->vfc_vfsops == (struct vfsops *)0)
+ maxtypenum = VT_NON;
+ for (vfsp = vfsconf, i = 0; i < maxvfsslots; i++, vfsp++) {
+ struct vfsconf vfsc;
+ if (vfsp->vfc_vfsops == (struct vfsops *)0) {
break;
- if (i) vfsconf[i-1].vfc_next = vfsp;
- if (maxtypenum <= vfsp->vfc_typenum)
+ }
+ if (i) {
+ vfsconf[i - 1].vfc_next = vfsp;
+ }
+ if (maxtypenum <= vfsp->vfc_typenum) {
maxtypenum = vfsp->vfc_typenum + 1;
- (*vfsp->vfc_vfsops->vfs_init)(vfsp);
+ }
+
+ bzero(&vfsc, sizeof(struct vfsconf));
+ vfsc.vfc_reserved1 = 0;
+ bcopy(vfsp->vfc_name, vfsc.vfc_name, sizeof(vfsc.vfc_name));
+ vfsc.vfc_typenum = vfsp->vfc_typenum;
+ vfsc.vfc_refcount = vfsp->vfc_refcount;
+ vfsc.vfc_flags = vfsp->vfc_flags;
+ vfsc.vfc_reserved2 = 0;
+ vfsc.vfc_reserved3 = 0;
+
+ if (vfsp->vfc_vfsops->vfs_sysctl) {
+ struct sysctl_oid *oidp = NULL;
+ struct sysctl_oid oid = SYSCTL_STRUCT_INIT(_vfs, vfsp->vfc_typenum, , CTLTYPE_NODE | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED, NULL, 0, vfs_sysctl_node, "-", "");
+
+ oidp = kheap_alloc(KHEAP_DEFAULT, sizeof(struct sysctl_oid), Z_WAITOK);
+ *oidp = oid;
+
+ /* Memory for VFS oid held by vfsentry forever */
+ vfsp->vfc_sysctl = oidp;
+ oidp->oid_name = vfsp->vfc_name;
+ sysctl_register_oid(vfsp->vfc_sysctl);
+ }
+
+ (*vfsp->vfc_vfsops->vfs_init)(&vfsc);
+
numused_vfsslots++;
+ numregistered_fses++;
}
/* next vfc_typenum to be used */
- maxvfsconf = maxtypenum;
+ maxvfstypenum = maxtypenum;
+
+ /*
+ * Initialize the vnop authorization scope.
+ */
+ vnode_authorize_init();
+
+ /*
+ * create a mount point for dead vnodes
+ */
+ mp = zalloc_flags(mount_zone, Z_WAITOK | Z_ZERO);
+ /* Initialize the default IO constraints */
+ mp->mnt_maxreadcnt = mp->mnt_maxwritecnt = MAXPHYS;
+ mp->mnt_segreadcnt = mp->mnt_segwritecnt = 32;
+ mp->mnt_maxsegreadsize = mp->mnt_maxreadcnt;
+ mp->mnt_maxsegwritesize = mp->mnt_maxwritecnt;
+ mp->mnt_devblocksize = DEV_BSIZE;
+ mp->mnt_alignmentmask = PAGE_MASK;
+ mp->mnt_ioqueue_depth = MNT_DEFAULT_IOQUEUE_DEPTH;
+ mp->mnt_ioscale = 1;
+ mp->mnt_ioflags = 0;
+ mp->mnt_realrootvp = NULLVP;
+ mp->mnt_authcache_ttl = CACHED_LOOKUP_RIGHT_TTL;
+
+ TAILQ_INIT(&mp->mnt_vnodelist);
+ TAILQ_INIT(&mp->mnt_workerqueue);
+ TAILQ_INIT(&mp->mnt_newvnodes);
+ mp->mnt_flag = MNT_LOCAL;
+ mp->mnt_lflag = MNT_LDEAD;
+ mount_lock_init(mp);
+
+#if CONFIG_MACF
+ mac_mount_label_init(mp);
+ mac_mount_label_associate(vfs_context_kernel(), mp);
+#endif
+ dead_mountp = mp;
+
+#if FS_COMPRESSION
+ decmpfs_init();
+#endif
+
+ nspace_resolver_init();
+}
+
+void
+vnode_list_lock(void)
+{
+ lck_spin_lock_grp(&vnode_list_spin_lock, &vnode_list_lck_grp);
}
+void
+vnode_list_unlock(void)
+{
+ lck_spin_unlock(&vnode_list_spin_lock);
+}
+
+void
+mount_list_lock(void)
+{
+ lck_mtx_lock(&mnt_list_mtx_lock);
+}
+
+void
+mount_list_unlock(void)
+{
+ lck_mtx_unlock(&mnt_list_mtx_lock);
+}
+
+void
+mount_lock_init(mount_t mp)
+{
+ lck_mtx_init(&mp->mnt_mlock, &mnt_lck_grp, &mnt_lck_attr);
+ lck_mtx_init(&mp->mnt_iter_lock, &mnt_lck_grp, &mnt_lck_attr);
+ lck_mtx_init(&mp->mnt_renamelock, &mnt_lck_grp, &mnt_lck_attr);
+ lck_rw_init(&mp->mnt_rwlock, &mnt_lck_grp, &mnt_lck_attr);
+}
+
+void
+mount_lock_destroy(mount_t mp)
+{
+ lck_mtx_destroy(&mp->mnt_mlock, &mnt_lck_grp);
+ lck_mtx_destroy(&mp->mnt_iter_lock, &mnt_lck_grp);
+ lck_mtx_destroy(&mp->mnt_renamelock, &mnt_lck_grp);
+ lck_rw_destroy(&mp->mnt_rwlock, &mnt_lck_grp);
+}
+
+
/*
- * Name: vfsconf_add
+ * Name: vfstable_add
*
* Description: Add a filesystem to the vfsconf list at the first
* unused slot. If no slots are available, return an
*
* Warning: This code assumes that vfsconf[0] is non-empty.
*/
-int
-vfsconf_add(struct vfsconf *nvfsp)
+struct vfstable *
+vfstable_add(struct vfstable *nvfsp)
{
int slot;
- struct vfsconf *slotp;
+ struct vfstable *slotp, *allocated = NULL;
+ struct sysctl_oid *oidp = NULL;
+
+
+ if (nvfsp->vfc_vfsops->vfs_sysctl) {
+ struct sysctl_oid oid = SYSCTL_STRUCT_INIT(_vfs, nvfsp->vfc_typenum, , CTLTYPE_NODE | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED, NULL, 0, vfs_sysctl_node, "-", "");
+
+ oidp = kheap_alloc(KHEAP_DEFAULT, sizeof(struct sysctl_oid), Z_WAITOK);
+ *oidp = oid;
+ }
- if (nvfsp == NULL) /* overkill */
- return (-1);
-
/*
* Find the next empty slot; we recognize an empty slot by a
* NULL-valued ->vfc_vfsops, so if we delete a VFS, we must
* ensure we set the entry back to NULL.
*/
+findslot:
+ mount_list_lock();
for (slot = 0; slot < maxvfsslots; slot++) {
- if (vfsconf[slot].vfc_vfsops == NULL)
+ if (vfsconf[slot].vfc_vfsops == NULL) {
break;
+ }
}
if (slot == maxvfsslots) {
- /* out of static slots; allocate one instead */
- MALLOC(slotp, struct vfsconf *, sizeof(struct vfsconf),
- M_TEMP, M_WAITOK);
+ if (allocated == NULL) {
+ mount_list_unlock();
+ /* out of static slots; allocate one instead */
+ allocated = kheap_alloc(KHEAP_DEFAULT, sizeof(struct vfstable),
+ Z_WAITOK);
+ goto findslot;
+ } else {
+ slotp = allocated;
+ }
} else {
slotp = &vfsconf[slot];
}
* Note; Takes advantage of the fact that 'slot' was left
* with the value of 'maxvfslots' in the allocation case.
*/
- bcopy(nvfsp, slotp, sizeof(struct vfsconf));
+ bcopy(nvfsp, slotp, sizeof(struct vfstable));
if (slot != 0) {
slotp->vfc_next = vfsconf[slot - 1].vfc_next;
vfsconf[slot - 1].vfc_next = slotp;
} else {
slotp->vfc_next = NULL;
}
- numused_vfsslots++;
- /*
- * Call through the ->vfs_init(); use slotp instead of nvfsp,
- * so that if the FS cares where it's instance record is, it
- * can find it later.
- *
- * XXX All code that calls ->vfs_init treats it as if it
- * XXX returns a "void', and can never fail.
- */
- if (nvfsp->vfc_vfsops->vfs_init)
- (*nvfsp->vfc_vfsops->vfs_init)(slotp);
+ if (slotp != allocated) {
+ /* used a statically allocated slot */
+ numused_vfsslots++;
+ }
+ numregistered_fses++;
- return(0);
+ if (oidp) {
+ /* Memory freed in vfstable_del after unregistration */
+ slotp->vfc_sysctl = oidp;
+ oidp->oid_name = slotp->vfc_name;
+ sysctl_register_oid(slotp->vfc_sysctl);
+ }
+
+ mount_list_unlock();
+
+ if (allocated && allocated != slotp) {
+ /* did allocation, but ended up using static slot */
+ kheap_free(KHEAP_DEFAULT, allocated, sizeof(struct vfstable));
+ }
+
+ return slotp;
}
/*
- * Name: vfsconf_del
+ * Name: vfstable_del
*
* Description: Remove a filesystem from the vfsconf list by name.
* If no such filesystem exists, return an error.
* Notes: Hopefully all filesystems have unique names.
*/
int
-vfsconf_del(char * fs_name)
+vfstable_del(struct vfstable * vtbl)
{
- struct vfsconf **vcpp;
- struct vfsconf *vcdelp;
+ struct vfstable **vcpp;
+ struct vfstable *vcdelp;
+
+#if DEBUG
+ lck_mtx_assert(&mnt_list_mtx_lock, LCK_MTX_ASSERT_OWNED);
+#endif /* DEBUG */
/*
- * Traverse the list looking for fs_name; if found, *vcpp
+ * Traverse the list looking for vtbl; if found, *vcpp
* will contain the address of the pointer to the entry to
* be removed.
*/
- for( vcpp = &vfsconf; *vcpp; vcpp = &(*vcpp)->vfc_next) {
- if (strcmp( (*vcpp)->vfc_name, fs_name) == 0)
- break;
- }
+ for (vcpp = &vfsconf; *vcpp; vcpp = &(*vcpp)->vfc_next) {
+ if (*vcpp == vtbl) {
+ break;
+ }
+ }
if (*vcpp == NULL) {
- /* XXX need real error code for entry not found */
- return(-1);
+ return ESRCH; /* vtbl not on vfsconf list */
+ }
+ if ((*vcpp)->vfc_sysctl) {
+ sysctl_unregister_oid((*vcpp)->vfc_sysctl);
+ (*vcpp)->vfc_sysctl->oid_name = NULL;
+ kheap_free(KHEAP_DEFAULT, (*vcpp)->vfc_sysctl, sizeof(struct sysctl_oid));
}
/* Unlink entry */
* seeing if the pointer to the object to be deleted places
* the object in the address space containing the table (or not).
*/
- if (vcdelp >= vfsconf && vcdelp < (vfsconf + maxvfsslots)) { /* Y */
+ if (vcdelp >= vfsconf && vcdelp < (vfsconf + maxvfsslots)) { /* Y */
/* Mark as empty for vfscon_add() */
- bzero(vcdelp, sizeof(struct vfsconf));
+ bzero(vcdelp, sizeof(struct vfstable));
+ numregistered_fses--;
numused_vfsslots--;
- } else { /* N */
+ } else { /* N */
/*
* This entry was dynamically allocated; we must free it;
* we would prefer to have just linked the caller's
* vfsconf onto our list, but it may not be persistent
* because of the previous (copying) implementation.
*/
- FREE(vcdelp, M_TEMP);
+ numregistered_fses--;
+ mount_list_unlock();
+ kheap_free(KHEAP_DEFAULT, vcdelp, sizeof(struct vfstable));
+ mount_list_lock();
}
- return(0);
+#if DEBUG
+ lck_mtx_assert(&mnt_list_mtx_lock, LCK_MTX_ASSERT_OWNED);
+#endif /* DEBUG */
+
+ return 0;
+}
+
+void
+SPECHASH_LOCK(void)
+{
+ lck_mtx_lock(&spechash_mtx_lock);
+}
+
+void
+SPECHASH_UNLOCK(void)
+{
+ lck_mtx_unlock(&spechash_mtx_lock);
}
projects / apple / xnu.git / blobdiff