/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * 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 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. 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
+ * This 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * 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@
*/
#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>
vn_default_error()
{
- return (EOPNOTSUPP);
+ return (ENOTSUP);
}
/*
* Also handle backwards compatibility.
*/
if (*opv_desc_vector_p == NULL) {
- /* XXX - shouldn't be M_VNODE */
MALLOC(*opv_desc_vector_p, PFI*,
- vfs_opv_numops*sizeof(PFI), M_VNODE, M_WAITOK);
+ vfs_opv_numops*sizeof(PFI), M_TEMP, M_WAITOK);
bzero (*opv_desc_vector_p, vfs_opv_numops*sizeof(PFI));
DODEBUG(printf("vector at %x allocated\n",
opv_desc_vector_p));
*/
if (opve_descp->opve_op->vdesc_offset == 0 &&
opve_descp->opve_op->vdesc_offset !=
- VOFFSET(vop_default)) {
+ VOFFSET(vnop_default)) {
printf("operation %s not listed in %s.\n",
opve_descp->opve_op->vdesc_name,
"vfs_op_descs");
/*
* 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)];
+ opv_desc_vector[VOFFSET(vnop_default)];
}
}
*/
extern struct vnodeops dead_vnodeops;
extern struct vnodeops spec_vnodeops;
-struct vattr va_null;
+/* vars for vnode lock */
+lck_grp_t * vnode_lck_grp;
+lck_grp_attr_t * vnode_lck_grp_attr;
+lck_attr_t * vnode_lck_attr;
+
+
+/* vars for vnode list lock */
+lck_grp_t * vnode_list_lck_grp;
+lck_grp_attr_t * vnode_list_lck_grp_attr;
+lck_attr_t * vnode_list_lck_attr;
+lck_mtx_t * vnode_list_mtx_lock;
+lck_mtx_t * spechash_mtx_lock;
+/* Routine to lock and unlock the vnode lists */
+void vnode_list_lock(void);
+void vnode_list_unlock(void);
+
+/* vars for vfsconf lock */
+lck_grp_t * fsconf_lck_grp;
+lck_grp_attr_t * fsconf_lck_grp_attr;
+lck_attr_t * fsconf_lck_attr;
+
+
+/* vars for mount lock */
+lck_grp_t * mnt_lck_grp;
+lck_grp_attr_t * mnt_lck_grp_attr;
+lck_attr_t * mnt_lck_attr;
+
+/* vars for mount list lock */
+lck_grp_t * mnt_list_lck_grp;
+lck_grp_attr_t * mnt_list_lck_grp_attr;
+lck_attr_t * mnt_list_lck_attr;
+lck_mtx_t * mnt_list_mtx_lock;
+
+extern void journal_init();
+
+struct mount * dead_mountp;
/*
* Initialize the vnode structures and initialize each file system type.
*/
+void
vfsinit()
{
- struct vfsconf *vfsp;
+ struct vfstable *vfsp;
int i, maxtypenum;
+ struct mount * mp;
+
+ /* Allocate vnode list lock group attribute and group */
+ vnode_list_lck_grp_attr = lck_grp_attr_alloc_init();
+
+ vnode_list_lck_grp = lck_grp_alloc_init("vnode list", vnode_list_lck_grp_attr);
+
+ /* Allocate vnode list lock attribute */
+ vnode_list_lck_attr = lck_attr_alloc_init();
+
+ /* Allocate vnode list lock */
+ vnode_list_mtx_lock = lck_mtx_alloc_init(vnode_list_lck_grp, vnode_list_lck_attr);
+
+ /* Allocate spec hash list lock */
+ spechash_mtx_lock = lck_mtx_alloc_init(vnode_list_lck_grp, vnode_list_lck_attr);
+
+ /* allocate vnode lock group attribute and group */
+ vnode_lck_grp_attr= lck_grp_attr_alloc_init();
+
+ vnode_lck_grp = lck_grp_alloc_init("vnode", vnode_lck_grp_attr);
+
+ /* Allocate vnode lock attribute */
+ vnode_lck_attr = lck_attr_alloc_init();
+
+ /* Allocate fs config lock group attribute and group */
+ fsconf_lck_grp_attr= lck_grp_attr_alloc_init();
+
+ fsconf_lck_grp = lck_grp_alloc_init("fs conf", fsconf_lck_grp_attr);
+
+ /* Allocate fs config lock attribute */
+ fsconf_lck_attr = lck_attr_alloc_init();
+
+ /* Allocate mount point related lock structures */
+
+ /* Allocate mount list lock group attribute and group */
+ mnt_list_lck_grp_attr= lck_grp_attr_alloc_init();
+
+ mnt_list_lck_grp = lck_grp_alloc_init("mount list", mnt_list_lck_grp_attr);
+
+ /* Allocate mount list lock attribute */
+ mnt_list_lck_attr = lck_attr_alloc_init();
+
+ /* Allocate mount list lock */
+ mnt_list_mtx_lock = lck_mtx_alloc_init(mnt_list_lck_grp, mnt_list_lck_attr);
+
+
+ /* allocate mount lock group attribute and group */
+ mnt_lck_grp_attr= lck_grp_attr_alloc_init();
+
+ mnt_lck_grp = lck_grp_alloc_init("mount", mnt_lck_grp_attr);
+
+ /* Allocate mount lock attribute */
+ mnt_lck_attr = lck_attr_alloc_init();
/*
* Initialize the "console user" for access purposes:
* Initialize the vnode table
*/
vntblinit();
+ /*
+ * Initialize the filesystem event mechanism.
+ */
+ vfs_event_init();
/*
* Initialize the vnode name cache
*/
nchinit();
+ /*
+ * Initialize the journaling locks
+ */
+ journal_init();
/*
* Build vnode operation vectors.
*/
vfs_op_init();
vfs_opv_init(); /* finish the job */
/*
- * Initialize each file system type.
+ * 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)
if (maxtypenum <= vfsp->vfc_typenum)
maxtypenum = vfsp->vfc_typenum + 1;
(*vfsp->vfc_vfsops->vfs_init)(vfsp);
+
+ lck_mtx_init(&vfsp->vfc_lock, fsconf_lck_grp, fsconf_lck_attr);
+
numused_vfsslots++;
}
/* next vfc_typenum to be used */
maxvfsconf = maxtypenum;
+
+ /*
+ * Initialize the vnop authorization scope.
+ */
+ vnode_authorize_init();
+
+ /*
+ * create a mount point for dead vnodes
+ */
+ MALLOC_ZONE(mp, struct mount *, (u_long)sizeof(struct mount),
+ M_MOUNT, M_WAITOK);
+ bzero((char *)mp, (u_long)sizeof(struct mount));
+ /* 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;
+
+ 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);
+ dead_mountp = mp;
}
-int
-vfsconf_add(struct vfsconf *nvfsp)
+void
+vnode_list_lock()
+{
+ lck_mtx_lock(vnode_list_mtx_lock);
+}
+
+void
+vnode_list_unlock()
{
- struct vfsconf *vfsp;
+ lck_mtx_unlock(vnode_list_mtx_lock);
+}
- if ((numused_vfsslots >= maxvfsslots) || (nvfsp == (struct vfsconf *)0))
- return (-1);
- bcopy(nvfsp, &vfsconf[numused_vfsslots], sizeof(struct vfsconf));
- vfsconf[numused_vfsslots-1].vfc_next = &vfsconf[numused_vfsslots];
-
- if (nvfsp->vfc_typenum <= maxvfsconf )
- maxvfsconf = nvfsp->vfc_typenum + 1;
+void
+mount_list_lock()
+{
+ lck_mtx_lock(mnt_list_mtx_lock);
+}
+
+void
+mount_list_unlock()
+{
+ 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_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_renamelock, mnt_lck_grp);
+ lck_rw_destroy(&mp->mnt_rwlock, mnt_lck_grp);
+}
+
+
+/*
+ * Name: vfstable_add
+ *
+ * Description: Add a filesystem to the vfsconf list at the first
+ * unused slot. If no slots are available, return an
+ * error.
+ *
+ * Parameter: nvfsp vfsconf for VFS to add
+ *
+ * Returns: 0 Success
+ * -1 Failure
+ *
+ * Notes: The vfsconf should be treated as a linked list by
+ * all external references, as the implementation is
+ * expected to change in the future. The linkage is
+ * through ->vfc_next, and the list is NULL terminated.
+ *
+ * Warning: This code assumes that vfsconf[0] is non-empty.
+ */
+struct vfstable *
+vfstable_add(struct vfstable *nvfsp)
+{
+ int slot;
+ struct vfstable *slotp;
+
+ /*
+ * 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.
+ */
+ for (slot = 0; slot < maxvfsslots; slot++) {
+ if (vfsconf[slot].vfc_vfsops == NULL)
+ break;
+ }
+ if (slot == maxvfsslots) {
+ /* out of static slots; allocate one instead */
+ MALLOC(slotp, struct vfstable *, sizeof(struct vfstable),
+ M_TEMP, M_WAITOK);
+ } else {
+ slotp = &vfsconf[slot];
+ }
+
+ /*
+ * Replace the contents of the next empty slot with the contents
+ * of the provided nvfsp.
+ *
+ * Note; Takes advantage of the fact that 'slot' was left
+ * with the value of 'maxvfslots' in the allocation case.
+ */
+ bcopy(nvfsp, slotp, sizeof(struct vfstable));
+ lck_mtx_init(&slotp->vfc_lock, fsconf_lck_grp, fsconf_lck_attr);
+ if (slot != 0) {
+ slotp->vfc_next = vfsconf[slot - 1].vfc_next;
+ vfsconf[slot - 1].vfc_next = slotp;
+ } else {
+ slotp->vfc_next = NULL;
+ }
numused_vfsslots++;
- if (nvfsp->vfc_vfsops->vfs_init)
- (*nvfsp->vfc_vfsops->vfs_init)(nvfsp);
- return(0);
+
+ return(slotp);
}
+/*
+ * Name: vfstable_del
+ *
+ * Description: Remove a filesystem from the vfsconf list by name.
+ * If no such filesystem exists, return an error.
+ *
+ * Parameter: fs_name name of VFS to remove
+ *
+ * Returns: 0 Success
+ * -1 Failure
+ *
+ * Notes: Hopefully all filesystems have unique names.
+ */
int
-vfsconf_del(char * fs_name)
+vfstable_del(struct vfstable * vtbl)
{
- int entriesRemaining;
- struct vfsconf *vfsconflistentry;
- struct vfsconf *prevconf = NULL;
- struct vfsconf *targetconf = NULL;
-
- prevconf = vfsconflistentry = vfsconf;
- for (entriesRemaining = maxvfsslots;
- (entriesRemaining > 0) && (vfsconflistentry != NULL);
- --entriesRemaining) {
- if ((vfsconflistentry->vfc_vfsops != NULL) && (strcmp(vfsconflistentry->vfc_name, fs_name) == 0)) {
- targetconf = vfsconflistentry;
+ struct vfstable **vcpp;
+ struct vfstable *vcdelp;
+
+ /*
+ * 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 (*vcpp == vtbl)
break;
- };
- prevconf = vfsconflistentry;
- vfsconflistentry = vfsconflistentry->vfc_next;
- };
-
- if (targetconf != NULL) {
- if (prevconf != NULL) {
- /* Unlink the target entry from the list:
- and decrement our count */
- prevconf->vfc_next = targetconf->vfc_next;
- numused_vfsslots--;
- } else {
- /* XXX need real error code for no previous entry in list */
- return(-1);
}
- } else {
- /* XXX need real error code for entry not found */
- return(-1);
- };
+
+ if (*vcpp == NULL)
+ return(ESRCH); /* vtbl not on vfsconf list */
+
+ /* Unlink entry */
+ vcdelp = *vcpp;
+ *vcpp = (*vcpp)->vfc_next;
+
+ lck_mtx_destroy(&vcdelp->vfc_lock, fsconf_lck_grp);
+
+ /*
+ * Is this an entry from our static table? We find out by
+ * 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 */
+ /* Mark as empty for vfscon_add() */
+ bzero(vcdelp, sizeof(struct vfstable));
+ numused_vfsslots--;
+ } 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);
+ }
+
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