xnu-2422.1.72.tar.gz

[apple/xnu.git] / bsd / vfs / vfs_init.c

diff --git a/bsd/vfs/vfs_init.c b/bsd/vfs/vfs_init.c
index a8e96370a3fb3ad4ba0b666be3cdb7f41d81ecb3..f9dfc09e576a44218a6affcb99140f1baaa9b0c2 100644 (file)
--- a/bsd/vfs/vfs_init.c
+++ b/bsd/vfs/vfs_init.c
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 


@@ -65,6 +65,12 @@
  *
  *     @(#)vfs_init.c  8.5 (Berkeley) 5/11/95
  */
  *
  *     @(#)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/param.h>


@@ -78,6 +84,14 @@
 #include <sys/errno.h>
 #include <sys/malloc.h>
 
 #include <sys/errno.h>
 #include <sys/malloc.h>
 

+#include <vfs/vfs_journal.h>   /* journal_init() */
+#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...
 
 /*
  * Sigh, such primitive tools are these...


@@ -88,7 +102,8 @@
 #define DODEBUG(A)
 #endif
 
 #define DODEBUG(A)
 #endif
 

-extern uid_t console_user;
+__private_extern__ void vntblinit(void);
+

 extern struct vnodeopv_desc *vfs_opv_descs[];
                                /* a list of lists of vnodeops defns */
 extern struct vnodeop_desc *vfs_op_descs[];
 extern struct vnodeopv_desc *vfs_opv_descs[];
                                /* a list of lists of vnodeops defns */
 extern struct vnodeop_desc *vfs_op_descs[];


@@ -101,14 +116,14 @@ extern struct vnodeop_desc *vfs_op_descs[];
  */
 int vfs_opv_numops;
 
  */
 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
 
 /*
  * A miscellaneous routine.
  * A generic "default" routine that just returns an error.
  */
 int

-vn_default_error()
+vn_default_error(void)

 {
 
        return (ENOTSUP);
 {
 
        return (ENOTSUP);


@@ -131,7 +146,7 @@ vn_default_error()
  * that is a(whole)nother story.) This is a feature.
  */
 void
  * 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 i, j, k;
        int (***opv_desc_vector_p)(void *);


@@ -148,9 +163,9 @@ vfs_opv_init()
                 * Also handle backwards compatibility.
                 */
                if (*opv_desc_vector_p == NULL) {
                 * 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));
+                       MALLOC(*opv_desc_vector_p, PFIvp*,
+                              vfs_opv_numops*sizeof(PFIvp), M_TEMP, M_WAITOK);
+                       bzero (*opv_desc_vector_p, vfs_opv_numops*sizeof(PFIvp));

                        DODEBUG(printf("vector at %x allocated\n",
                            opv_desc_vector_p));
                }
                        DODEBUG(printf("vector at %x allocated\n",
                            opv_desc_vector_p));
                }


@@ -214,7 +229,7 @@ vfs_opv_init()
  * Initialize known vnode operations vectors.
  */
 void
  * Initialize known vnode operations vectors.
  */
 void

-vfs_op_init()
+vfs_op_init(void)

 {
        int i;
 
 {
        int i;
 


@@ -246,16 +261,19 @@ lck_grp_t * vnode_lck_grp;
 lck_grp_attr_t * vnode_lck_grp_attr;
 lck_attr_t * vnode_lck_attr;
 
 lck_grp_attr_t * vnode_lck_grp_attr;
 lck_attr_t * vnode_lck_attr;
 

+#if CONFIG_TRIGGERS
+/* vars for vnode trigger resolver */
+lck_grp_t * trigger_vnode_lck_grp;
+lck_grp_attr_t * trigger_vnode_lck_grp_attr;
+lck_attr_t * trigger_vnode_lck_attr;
+#endif

 
 /* 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;
 
 /* 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_spin_t * vnode_list_spin_lock;

 lck_mtx_t * spechash_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;
 
 /* vars for vfsconf lock */
 lck_grp_t * fsconf_lck_grp;


@@ -274,14 +292,17 @@ lck_grp_attr_t * mnt_list_lck_grp_attr;
 lck_attr_t * mnt_list_lck_attr;
 lck_mtx_t * mnt_list_mtx_lock;
 
 lck_attr_t * mnt_list_lck_attr;
 lck_mtx_t * mnt_list_mtx_lock;
 

-extern void journal_init();
+lck_mtx_t *pkg_extensions_lck;

 
 struct mount * dead_mountp;
 
 struct mount * dead_mountp;

+
+extern void nspace_handler_init(void);
+

 /*
  * Initialize the vnode structures and initialize each file system type.
  */
 void
 /*
  * Initialize the vnode structures and initialize each file system type.
  */
 void

-vfsinit()
+vfsinit(void)

 {
        struct vfstable *vfsp;
        int i, maxtypenum;
 {
        struct vfstable *vfsp;
        int i, maxtypenum;


@@ -296,11 +317,14 @@ vfsinit()
        vnode_list_lck_attr = lck_attr_alloc_init();
 
        /* Allocate vnode list lock */
        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);
+       vnode_list_spin_lock = lck_spin_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 spec hash list lock */
        spechash_mtx_lock = lck_mtx_alloc_init(vnode_list_lck_grp, vnode_list_lck_attr);
 

+       /* Allocate the package extensions table lock */
+       pkg_extensions_lck = 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();
 
        /* allocate vnode lock group attribute and group */
        vnode_lck_grp_attr= lck_grp_attr_alloc_init();
 


@@ -309,6 +333,12 @@ vfsinit()
        /* Allocate vnode lock attribute */
        vnode_lck_attr = lck_attr_alloc_init();
 
        /* Allocate vnode lock attribute */
        vnode_lck_attr = lck_attr_alloc_init();
 

+#if CONFIG_TRIGGERS
+       trigger_vnode_lck_grp_attr = lck_grp_attr_alloc_init();
+       trigger_vnode_lck_grp = lck_grp_alloc_init("trigger_vnode", trigger_vnode_lck_grp_attr);
+       trigger_vnode_lck_attr = lck_attr_alloc_init();
+#endif
+

        /* Allocate fs config lock group attribute and group */
        fsconf_lck_grp_attr= lck_grp_attr_alloc_init();
 
        /* Allocate fs config lock group attribute and group */
        fsconf_lck_grp_attr= lck_grp_attr_alloc_init();
 


@@ -339,11 +369,6 @@ vfsinit()
        /* Allocate mount lock attribute */
        mnt_lck_attr = lck_attr_alloc_init();
 
        /* Allocate mount lock attribute */
        mnt_lck_attr = lck_attr_alloc_init();
 

-       /*
-        * Initialize the "console user" for access purposes:
-        */
-       console_user = (uid_t)0;
-       

        /*
         * Initialize the vnode table
         */
        /*
         * Initialize the vnode table
         */


@@ -356,10 +381,15 @@ vfsinit()
         * Initialize the vnode name cache
         */
        nchinit();
         * Initialize the vnode name cache
         */
        nchinit();

+
+#if JOURNALING

        /*
         * Initialize the journaling locks
         */
        journal_init();
        /*
         * Initialize the journaling locks
         */
        journal_init();

+#endif 
+       nspace_handler_init();
+

        /*
         * Build vnode operation vectors.
         */
        /*
         * Build vnode operation vectors.
         */


@@ -370,16 +400,25 @@ vfsinit()
         * until the first NULL ->vfs_vfsops is encountered.
         */
        numused_vfsslots = maxtypenum = 0;
         * until the first NULL ->vfs_vfsops is encountered.
         */
        numused_vfsslots = maxtypenum = 0;

-       for (vfsp = vfsconf, i = 0; i < maxvfsconf; i++, vfsp++) {
+       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)
                        maxtypenum = vfsp->vfc_typenum + 1;
                if (vfsp->vfc_vfsops == (struct vfsops *)0)
                        break;
                if (i) vfsconf[i-1].vfc_next = vfsp;
                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);

                
                

+               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;
+
+               (*vfsp->vfc_vfsops->vfs_init)(&vfsc);
+

                numused_vfsslots++;
        }
        /* next vfc_typenum to be used */
                numused_vfsslots++;
        }
        /* next vfc_typenum to be used */


@@ -389,19 +428,32 @@ vfsinit()
         * Initialize the vnop authorization scope.
         */
        vnode_authorize_init();
         * Initialize the vnop authorization scope.
         */
        vnode_authorize_init();

+
+       /*
+        * Initialiize the quota system.
+        */
+#if QUOTA
+       dqinit();
+#endif

        
        /* 
         * create a mount point for dead vnodes
         */
        
        /* 
         * create a mount point for dead vnodes
         */

-       MALLOC_ZONE(mp, struct mount *, (u_long)sizeof(struct mount),
+       MALLOC_ZONE(mp, struct mount *, sizeof(struct mount),

                M_MOUNT, M_WAITOK);
                M_MOUNT, M_WAITOK);

-       bzero((char *)mp, (u_long)sizeof(struct mount));
+       bzero((char *)mp, 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;
        /* 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_vnodelist);
        TAILQ_INIT(&mp->mnt_workerqueue);


@@ -409,29 +461,34 @@ vfsinit()
        mp->mnt_flag = MNT_LOCAL;
        mp->mnt_lflag = MNT_LDEAD;
        mount_lock_init(mp);
        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;
 }
 
 void
        dead_mountp = mp;
 }
 
 void

-vnode_list_lock()
+vnode_list_lock(void)

 {
 {

-       lck_mtx_lock(vnode_list_mtx_lock);
+       lck_spin_lock(vnode_list_spin_lock);

 }
 
 void
 }
 
 void

-vnode_list_unlock()
+vnode_list_unlock(void)

 {
 {

-       lck_mtx_unlock(vnode_list_mtx_lock);
+       lck_spin_unlock(vnode_list_spin_lock);

 }
 
 void
 }
 
 void

-mount_list_lock()
+mount_list_lock(void)

 {
        lck_mtx_lock(mnt_list_mtx_lock);
 }
 
 void
 {
        lck_mtx_lock(mnt_list_mtx_lock);
 }
 
 void

-mount_list_unlock()
+mount_list_unlock(void)

 {
        lck_mtx_unlock(mnt_list_mtx_lock);
 }
 {
        lck_mtx_unlock(mnt_list_mtx_lock);
 }


@@ -476,21 +533,30 @@ struct vfstable *
 vfstable_add(struct vfstable  *nvfsp)
 {
        int slot;
 vfstable_add(struct vfstable  *nvfsp)
 {
        int slot;

-       struct vfstable *slotp;
+       struct vfstable *slotp, *allocated = NULL;

 
        /*
         * 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.
         */
 
        /*
         * 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)
                        break;
        }
        if (slot == maxvfsslots) {
        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);
+               if (allocated == NULL) {
+                       mount_list_unlock();
+                       /* out of static slots; allocate one instead */
+                       MALLOC(allocated, struct vfstable *, sizeof(struct vfstable),
+                                       M_TEMP, M_WAITOK);
+                       goto findslot;
+               } else {
+                       slotp = allocated;
+                       allocated = NULL;
+               }

        } else {
                slotp = &vfsconf[slot];
        }
        } else {
                slotp = &vfsconf[slot];
        }


@@ -503,7 +569,6 @@ vfstable_add(struct vfstable  *nvfsp)
         * with the value of 'maxvfslots' in the allocation case.
         */
        bcopy(nvfsp, slotp, sizeof(struct vfstable));
         * 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;
        if (slot != 0) {
                slotp->vfc_next = vfsconf[slot - 1].vfc_next;
                vfsconf[slot - 1].vfc_next = slotp;


@@ -512,6 +577,12 @@ vfstable_add(struct vfstable  *nvfsp)
        }
        numused_vfsslots++;
 
        }
        numused_vfsslots++;
 

+       mount_list_unlock();
+
+       if (allocated != NULL) {
+               FREE(allocated, M_TEMP);
+       }
+

        return(slotp);
 }
 
        return(slotp);
 }
 


@@ -534,6 +605,10 @@ vfstable_del(struct vfstable  * vtbl)
        struct vfstable **vcpp;
        struct vfstable *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 vtbl; if found, *vcpp
         * will contain the address of the pointer to the entry to
        /*
         * Traverse the list looking for vtbl; if found, *vcpp
         * will contain the address of the pointer to the entry to


@@ -551,8 +626,6 @@ vfstable_del(struct vfstable  * vtbl)
        vcdelp = *vcpp;
        *vcpp = (*vcpp)->vfc_next;
 
        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
        /*
         * Is this an entry from our static table?  We find out by
         * seeing if the pointer to the object to be deleted places


@@ -569,9 +642,15 @@ vfstable_del(struct vfstable  * vtbl)
                 * vfsconf onto our list, but it may not be persistent
                 * because of the previous (copying) implementation.
                 */
                 * vfsconf onto our list, but it may not be persistent
                 * because of the previous (copying) implementation.
                 */

-                FREE(vcdelp, M_TEMP);
+               mount_list_unlock();
+               FREE(vcdelp, M_TEMP);
+               mount_list_lock();

        }
 
        }
 

+#if DEBUG
+       lck_mtx_assert(mnt_list_mtx_lock, LCK_MTX_ASSERT_OWNED);
+#endif /* DEBUG */
+

        return(0);
 }
 
        return(0);
 }