xnu-1228.5.18.tar.gz

[apple/xnu.git] / bsd / miscfs / devfs / devfs_vfsops.c

diff --git a/bsd/miscfs/devfs/devfs_vfsops.c b/bsd/miscfs/devfs/devfs_vfsops.c
index d7db72496645e199823e52e915f3ebe2e0f0e613..fc9b55f24132f0d7a579b06dc82d1236b1818038 100644 (file)
--- a/bsd/miscfs/devfs/devfs_vfsops.c
+++ b/bsd/miscfs/devfs/devfs_vfsops.c
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.

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


@@ -53,6 +53,12 @@
  * devfs_vfsops.c
  *
  */
  * devfs_vfsops.c
  *
  */

+/*
+ * 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.
+ */

 /*
  * HISTORY
  *  Dieter Siegmund (dieter@apple.com) Wed Jul 14 13:37:59 PDT 1999
 /*
  * HISTORY
  *  Dieter Siegmund (dieter@apple.com) Wed Jul 14 13:37:59 PDT 1999


@@ -70,14 +76,21 @@
 #include <sys/mount_internal.h>
 #include <sys/malloc.h>
 
 #include <sys/mount_internal.h>
 #include <sys/malloc.h>
 

+#include <libkern/OSAtomic.h>
+
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
+

 #include "devfs.h"
 #include "devfsdefs.h"
 
 #include "devfs.h"
 #include "devfsdefs.h"
 

-static int devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, vfs_context_t context);
-static int devfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t context);
+static int devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, vfs_context_t ctx);
+static int devfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t ctx);

 
 static struct vfstable * devfs_vfsp = 0;
 extern int setup_kmem;
 
 static struct vfstable * devfs_vfsp = 0;
 extern int setup_kmem;

+__private_extern__ void devfs_setup_kmem(void);

 
 
 /*-
 
 
 /*-


@@ -136,7 +149,7 @@ devfs_setup_kmem(void)
  */
 /*proto*/
 int
  */
 /*proto*/
 int

-devfs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, vfs_context_t context)
+devfs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, vfs_context_t ctx)

 {
        struct devfsmount *devfs_mp_p;  /* devfs specific mount info */
        int error;
 {
        struct devfsmount *devfs_mp_p;  /* devfs specific mount info */
        int error;


@@ -193,14 +206,14 @@ devfs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data,
        
        bzero(mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN);
        bcopy("devfs",mp->mnt_vfsstat.f_mntfromname, 5);
        
        bzero(mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN);
        bcopy("devfs",mp->mnt_vfsstat.f_mntfromname, 5);

-       (void)devfs_statfs(mp, &mp->mnt_vfsstat, context);
+       (void)devfs_statfs(mp, &mp->mnt_vfsstat, ctx);

 
        return 0;
 }
 
 
 static int
 
        return 0;
 }
 
 
 static int

-devfs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t context)
+devfs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx)

 {
        return 0;
 }
 {
        return 0;
 }


@@ -209,7 +222,7 @@ devfs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_
  *  Unmount the filesystem described by mp.
  */
 static int
  *  Unmount the filesystem described by mp.
  */
 static int

-devfs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t context)
+devfs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx)

 {
        struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
        int flags = 0;
 {
        struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
        int flags = 0;


@@ -239,20 +252,21 @@ devfs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t context)
 
 /* return the address of the root vnode  in *vpp */
 static int
 
 /* return the address of the root vnode  in *vpp */
 static int

-devfs_root(struct mount *mp, struct vnode **vpp, vfs_context_t context)
+devfs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t ctx)

 {
        struct devfsmount *devfs_mp_p = (struct devfsmount *)(mp->mnt_data);
        int error;
 
        DEVFS_LOCK();
 {
        struct devfsmount *devfs_mp_p = (struct devfsmount *)(mp->mnt_data);
        int error;
 
        DEVFS_LOCK();

-       error = devfs_dntovn(devfs_mp_p->plane_root->de_dnp, vpp, context->vc_proc);
+       /* last parameter to devfs_dntovn() is ignored */
+       error = devfs_dntovn(devfs_mp_p->plane_root->de_dnp, vpp, NULL);

        DEVFS_UNLOCK();
 
        return error;
 }
 
 static int
        DEVFS_UNLOCK();
 
        return error;
 }
 
 static int

-devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t context)
+devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t ctx)

 {
        struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
 
 {
        struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
 


@@ -279,7 +293,7 @@ devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t co
 }
 
 static int
 }
 
 static int

-devfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t context)
+devfs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx)

 {
        VFSATTR_RETURN(fsap, f_objcount, devfs_stats.nodes);
        VFSATTR_RETURN(fsap, f_maxobjcount, devfs_stats.nodes);
 {
        VFSATTR_RETURN(fsap, f_objcount, devfs_stats.nodes);
        VFSATTR_RETURN(fsap, f_maxobjcount, devfs_stats.nodes);


@@ -305,14 +319,14 @@ devfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t context)
 }
 
 static int
 }
 
 static int

-devfs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t context)
+devfs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t ctx)

 {
     return (0);
 }
 
 
 static int
 {
     return (0);
 }
 
 
 static int

-devfs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnode **vpp, __unused vfs_context_t context)
+devfs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnode **vpp, __unused vfs_context_t ctx)

 {
        return ENOTSUP;
 }
 {
        return ENOTSUP;
 }


@@ -323,14 +337,14 @@ devfs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnod
  */
 
 static int
  */
 
 static int

-devfs_fhtovp (__unused struct mount *mp, __unused int fhlen, __unused unsigned char *fhp, __unused struct vnode **vpp, __unused vfs_context_t context)
+devfs_fhtovp (__unused struct mount *mp, __unused int fhlen, __unused unsigned char *fhp, __unused struct vnode **vpp, __unused vfs_context_t ctx)

 {
        return (EINVAL);
 }
 
 
 static int
 {
        return (EINVAL);
 }
 
 
 static int

-devfs_vptofh (__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned char *fhp, __unused vfs_context_t context)
+devfs_vptofh (__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned char *fhp, __unused vfs_context_t ctx)

 {
        return (EINVAL);
 }
 {
        return (EINVAL);
 }


@@ -338,7 +352,7 @@ devfs_vptofh (__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned
 static int
 devfs_sysctl(__unused int *name, __unused u_int namelen, __unused user_addr_t oldp, 
              __unused size_t *oldlenp, __unused user_addr_t newp, 
 static int
 devfs_sysctl(__unused int *name, __unused u_int namelen, __unused user_addr_t oldp, 
              __unused size_t *oldlenp, __unused user_addr_t newp, 

-             __unused size_t newlen, __unused vfs_context_t context)
+             __unused size_t newlen, __unused vfs_context_t ctx)

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


@@ -357,20 +371,18 @@ devfs_kernel_mount(char * mntname)
        int error;
        struct nameidata nd;
        struct vnode  * vp;
        int error;
        struct nameidata nd;
        struct vnode  * vp;

-       struct vfs_context context;
+       vfs_context_t ctx = vfs_context_kernel();

 
        if (devfs_vfsp == NULL) {
            printf("devfs_kernel_mount: devfs_vfsp is NULL\n");
            return (EINVAL);
        }
 
        if (devfs_vfsp == NULL) {
            printf("devfs_kernel_mount: devfs_vfsp is NULL\n");
            return (EINVAL);
        }

-       context.vc_proc = current_proc();
-       context.vc_ucred = kauth_cred_get();

 
        /*
         * Get vnode to be covered
         */
        NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE32,
 
        /*
         * Get vnode to be covered
         */
        NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE32,

-           CAST_USER_ADDR_T(mntname), &context);
+           CAST_USER_ADDR_T(mntname), ctx);

        if ((error = namei(&nd))) {
            printf("devfs_kernel_mount: failed to find directory '%s', %d", 
                   mntname, error);
        if ((error = namei(&nd))) {
            printf("devfs_kernel_mount: failed to find directory '%s', %d", 
                   mntname, error);


@@ -379,7 +391,7 @@ devfs_kernel_mount(char * mntname)
        nameidone(&nd);
        vp = nd.ni_vp;
 
        nameidone(&nd);
        vp = nd.ni_vp;
 

-       if ((error = VNOP_FSYNC(vp, MNT_WAIT, &context))) {
+       if ((error = VNOP_FSYNC(vp, MNT_WAIT, ctx))) {

            printf("devfs_kernel_mount: vnop_fsync failed: %d\n", error);
            vnode_put(vp);
            return (error);
            printf("devfs_kernel_mount: vnop_fsync failed: %d\n", error);
            vnode_put(vp);
            return (error);


@@ -409,6 +421,9 @@ devfs_kernel_mount(char * mntname)
        /* Initialize the default IO constraints */
        mp->mnt_maxreadcnt = mp->mnt_maxwritecnt = MAXPHYS;
        mp->mnt_segreadcnt = mp->mnt_segwritecnt = 32;
        /* Initialize the default IO constraints */
        mp->mnt_maxreadcnt = mp->mnt_maxwritecnt = MAXPHYS;
        mp->mnt_segreadcnt = mp->mnt_segwritecnt = 32;

+       mp->mnt_ioflags = 0;
+       mp->mnt_realrootvp = NULLVP;
+       mp->mnt_authcache_ttl = CACHED_LOOKUP_RIGHT_TTL;

 
        mount_lock_init(mp);
        TAILQ_INIT(&mp->mnt_vnodelist);
 
        mount_lock_init(mp);
        TAILQ_INIT(&mp->mnt_vnodelist);


@@ -423,13 +438,17 @@ devfs_kernel_mount(char * mntname)
        devfs_vfsp->vfc_64bitready = TRUE;
        mp->mnt_flag = 0;
        mp->mnt_flag |= devfs_vfsp->vfc_flags & MNT_VISFLAGMASK;
        devfs_vfsp->vfc_64bitready = TRUE;
        mp->mnt_flag = 0;
        mp->mnt_flag |= devfs_vfsp->vfc_flags & MNT_VISFLAGMASK;

-       strncpy(mp->mnt_vfsstat.f_fstypename, devfs_vfsp->vfc_name, MFSTYPENAMELEN);
+       strlcpy(mp->mnt_vfsstat.f_fstypename, devfs_vfsp->vfc_name, MFSTYPENAMELEN);

        vp->v_mountedhere = mp;
        mp->mnt_vnodecovered = vp;
        mp->mnt_vfsstat.f_owner = kauth_cred_getuid(kauth_cred_get());
        (void) copystr(mntname, mp->mnt_vfsstat.f_mntonname, MAXPATHLEN - 1, 0);
        vp->v_mountedhere = mp;
        mp->mnt_vnodecovered = vp;
        mp->mnt_vfsstat.f_owner = kauth_cred_getuid(kauth_cred_get());
        (void) copystr(mntname, mp->mnt_vfsstat.f_mntonname, MAXPATHLEN - 1, 0);

+#if CONFIG_MACF
+       mac_mount_label_init(mp);
+       mac_mount_label_associate(ctx, mp);
+#endif

 
 

-       error = devfs_mount(mp, NULL, NULL, &context);
+       error = devfs_mount(mp, NULL, USER_ADDR_NULL, ctx);

 
        if (error) {
            printf("devfs_kernel_mount: mount %s failed: %d", mntname, error);
 
        if (error) {
            printf("devfs_kernel_mount: mount %s failed: %d", mntname, error);


@@ -438,6 +457,9 @@ devfs_kernel_mount(char * mntname)
            vfs_unbusy(mp);
 
            mount_lock_destroy(mp);
            vfs_unbusy(mp);
 
            mount_lock_destroy(mp);

+#if CONFIG_MACF
+           mac_mount_label_destroy(mp);
+#endif

            FREE_ZONE(mp, sizeof (struct mount), M_MOUNT);
            vnode_put(vp);
            return (error);
            FREE_ZONE(mp, sizeof (struct mount), M_MOUNT);
            vnode_put(vp);
            return (error);


@@ -461,5 +483,7 @@ struct vfsops devfs_vfsops = {
        devfs_fhtovp,
        devfs_vptofh,
        devfs_init,
        devfs_fhtovp,
        devfs_vptofh,
        devfs_init,

-       devfs_sysctl
+       devfs_sysctl,
+       NULL,
+       {NULL}

 };
 };