xnu-1228.0.2.tar.gz

[apple/xnu.git] / bsd / sys / vnode_internal.h

diff --git a/bsd/sys/vnode_internal.h b/bsd/sys/vnode_internal.h
index f2dd79ba268a264ef016201119b1d1616727372d..ae4be39a919a1c12961f826d49e0778c30ef99a8 100644 (file)
--- a/bsd/sys/vnode_internal.h
+++ b/bsd/sys/vnode_internal.h
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2005 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@
  * 


@@ -60,7 +60,13 @@
  *
  *     @(#)vnode.h     8.17 (Berkeley) 5/20/95
  */
  *
  *     @(#)vnode.h     8.17 (Berkeley) 5/20/95
  */

- 
+/*
+ * 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.
+ */
+

 #ifndef _SYS_VNODE_INTERNAL_H_
 #define _SYS_VNODE_INTERNAL_H_
 
 #ifndef _SYS_VNODE_INTERNAL_H_
 #define _SYS_VNODE_INTERNAL_H_
 


@@ -81,9 +87,11 @@
 #include <sys/vnode.h>
 #include <sys/namei.h>
 #include <sys/vfs_context.h>
 #include <sys/vnode.h>
 #include <sys/namei.h>
 #include <sys/vfs_context.h>

+#include <sys/sysctl.h>

 
 
 struct lockf;
 
 
 struct lockf;

+struct label;

 
 LIST_HEAD(buflists, buf);
 
 
 LIST_HEAD(buflists, buf);
 


@@ -109,6 +117,7 @@ struct vnode {
         LIST_HEAD(, namecache) v_nclinks;      /* name cache entries that name this vnode */
         LIST_HEAD(, namecache) v_ncchildren;   /* name cache entries that regard us as there parent */
         vnode_t         v_defer_reclaimlist;           /* in case we have to defer the reclaim to avoid recursion */
         LIST_HEAD(, namecache) v_nclinks;      /* name cache entries that name this vnode */
         LIST_HEAD(, namecache) v_ncchildren;   /* name cache entries that regard us as there parent */
         vnode_t         v_defer_reclaimlist;           /* in case we have to defer the reclaim to avoid recursion */

+        u_long  v_listflag;                    /* flags protected by the vnode_list_lock (see below) */

        u_long   v_flag;                        /* vnode flags (see below) */
        u_short  v_lflag;                       /* vnode local and named ref flags */
        u_char   v_iterblkflags;                /* buf iterator flags */
        u_long   v_flag;                        /* vnode flags (see below) */
        u_short  v_lflag;                       /* vnode local and named ref flags */
        u_char   v_iterblkflags;                /* buf iterator flags */


@@ -117,8 +126,9 @@ struct vnode {
        int32_t  v_usecount;                    /* reference count of users */
        int32_t  v_iocount;                     /* iocounters */
        void *   v_owner;                       /* act that owns the vnode */
        int32_t  v_usecount;                    /* reference count of users */
        int32_t  v_iocount;                     /* iocounters */
        void *   v_owner;                       /* act that owns the vnode */

-       enum vtype v_type;                      /* vnode type */
-       u_long   v_id;                          /* identity of vnode contents */
+       u_short  v_type;                        /* vnode type */
+       u_short  v_tag;                         /* type of underlying data */
+       int      v_id;                          /* identity of vnode contents */

        union {
                struct mount    *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
                struct socket   *vu_socket;     /* unix ipc (VSOCK) */
        union {
                struct mount    *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
                struct socket   *vu_socket;     /* unix ipc (VSOCK) */


@@ -128,20 +138,32 @@ struct vnode {
        } v_un;
        struct  buflists v_cleanblkhd;          /* clean blocklist head */
        struct  buflists v_dirtyblkhd;          /* dirty blocklist head */
        } v_un;
        struct  buflists v_cleanblkhd;          /* clean blocklist head */
        struct  buflists v_dirtyblkhd;          /* dirty blocklist head */

-        kauth_cred_t v_cred;
-        int    v_cred_timestamp;
+        /*
+        * the following 4 fields are protected
+        * by the name_cache_lock held in 
+        * excluive mode
+        */
+        kauth_cred_t   v_cred;                 /* last authorized credential */
+        kauth_action_t v_authorized_actions;   /* current authorized actions for v_cred */
+        int            v_cred_timestamp;       /* determine if entry is stale for MNTK_AUTH_OPAQUE */
+        int            v_nc_generation;        /* changes when nodes are removed from the name cache */
+        /*
+        * back to the vnode lock for protection
+        */

        long    v_numoutput;                    /* num of writes in progress */
        long    v_writecount;                   /* reference count of writers */
        long    v_numoutput;                    /* num of writes in progress */
        long    v_writecount;                   /* reference count of writers */

-       char *  v_name;                         /* name component of the vnode */
+       const char *v_name;                     /* name component of the vnode */

        vnode_t v_parent;                       /* pointer to parent vnode */
 #ifdef INTERIM_FSNODE_LOCK
        struct lockf    *v_lockf;               /* advisory lock list head */
         struct unsafe_fsnode *v_unsafefs;      /* pointer to struct used to lock */
 #endif                                         /* vnodes on unsafe filesystems */
        int     (**v_op)(void *);               /* vnode operations vector */
        vnode_t v_parent;                       /* pointer to parent vnode */
 #ifdef INTERIM_FSNODE_LOCK
        struct lockf    *v_lockf;               /* advisory lock list head */
         struct unsafe_fsnode *v_unsafefs;      /* pointer to struct used to lock */
 #endif                                         /* vnodes on unsafe filesystems */
        int     (**v_op)(void *);               /* vnode operations vector */

-       enum vtagtype v_tag;                    /* type of underlying data */

        mount_t v_mount;                        /* ptr to vfs we are in */
        void *  v_data;                         /* private data for fs */
        mount_t v_mount;                        /* ptr to vfs we are in */
        void *  v_data;                         /* private data for fs */

+#if CONFIG_MACF
+       struct label *v_label;                  /* MAC security label */
+#endif

 };
 
 #define        v_mountedhere   v_un.vu_mountedhere
 };
 
 #define        v_mountedhere   v_un.vu_mountedhere


@@ -160,6 +182,11 @@ struct vnode {
 #define VBI_DIRTY              0x8
 #define VBI_NEWBUF             0x10
 
 #define VBI_DIRTY              0x8
 #define VBI_NEWBUF             0x10
 

+/*
+ * v_listflag
+ */
+#define VLIST_RAGE    0x01            /* vnode is currently in the rapid age list */
+#define VLIST_DEAD    0x02            /* vnode is currently in the dead list */

 
 /*
  * v_lflags
 
 /*
  * v_lflags


@@ -173,11 +200,15 @@ struct vnode {
 #define        VL_MOUNTDEAD    0x0040          /* v_moutnedhere is dead   */
 #define VL_NEEDINACTIVE        0x0080          /* delay VNOP_INACTIVE until iocount goes to 0 */
 
 #define        VL_MOUNTDEAD    0x0040          /* v_moutnedhere is dead   */
 #define VL_NEEDINACTIVE        0x0080          /* delay VNOP_INACTIVE until iocount goes to 0 */
 

+#define        VL_LABEL        0x0100          /* vnode is marked for labeling */
+#define        VL_LABELWAIT    0x0200          /* vnode is marked for labeling */
+#define        VL_LABELED      0x0400          /* vnode is labeled */
+#define        VL_LWARNED      0x0800
+

 #define        VNAMED_UBC      0x2000          /* ubc named reference */
 #define VNAMED_MOUNT   0x4000          /* mount point named reference */
 #define        VNAMED_FSHASH   0x8000          /* FS hash named reference */
 
 #define        VNAMED_UBC      0x2000          /* ubc named reference */
 #define VNAMED_MOUNT   0x4000          /* mount point named reference */
 #define        VNAMED_FSHASH   0x8000          /* FS hash named reference */
 

-

 /*
  * v_flags
  */
 /*
  * v_flags
  */


@@ -185,9 +216,9 @@ struct vnode {
 #define        VTEXT           0x000002        /* vnode is a pure text prototype */
 #define        VSYSTEM         0x000004        /* vnode being used by kernel */
 #define        VISTTY          0x000008        /* vnode represents a tty */
 #define        VTEXT           0x000002        /* vnode is a pure text prototype */
 #define        VSYSTEM         0x000004        /* vnode being used by kernel */
 #define        VISTTY          0x000008        /* vnode represents a tty */

-#define        VWASMAPPED      0x000010        /* vnode was mapped before */
-#define        VTERMINATE      0x000020        /* terminating memory object */
-#define        VTERMWANT       0x000040        /* wating for memory object death */
+#define        VRAGE           0x000010        /* vnode is in rapid age state */
+#define VBDEVVP                0x000020        /* vnode created by bdevvp */
+#define VDEVFLUSH      0x000040        /* device vnode after vflush */

 #define        VMOUNT          0x000080        /* mount operation in progress */
 #define        VBWAIT          0x000100        /* waiting for output to complete */
 #define        VALIASED        0x000200        /* vnode has an alias */
 #define        VMOUNT          0x000080        /* mount operation in progress */
 #define        VBWAIT          0x000100        /* waiting for output to complete */
 #define        VALIASED        0x000200        /* vnode has an alias */


@@ -203,9 +234,11 @@ struct vnode {
 #define        VNOFLUSH        0x040000        /* don't vflush() if SKIPSYSTEM */
 #define        VLOCKLOCAL      0x080000        /* this vnode does adv locking in vfs */
 #define        VISHARDLINK     0x100000        /* hard link needs special processing on lookup and in volfs */
 #define        VNOFLUSH        0x040000        /* don't vflush() if SKIPSYSTEM */
 #define        VLOCKLOCAL      0x080000        /* this vnode does adv locking in vfs */
 #define        VISHARDLINK     0x100000        /* hard link needs special processing on lookup and in volfs */

-
-#define VCRED_EXPIRED  2               /* number of seconds to keep cached credential valid */
-
+#define        VISUNION        0x200000        /* union special processing */
+#if NAMEDSTREAMS
+#define        VISNAMEDSTREAM  0x400000        /* vnode is a named stream (eg HFS resource fork) */
+#endif
+#define VOPENEVT        0x800000        /* if process is P_CHECKOPENEVT, then or in the O_EVTONLY flag on open */

 
 /*
  * Global vnode data.
 
 /*
  * Global vnode data.


@@ -240,7 +273,7 @@ extern      struct vnode *rootvnode;        /* root (i.e. "/") vnode */
  */
 struct vnodeop_desc {
        int     vdesc_offset;           /* offset in vector--first for speed */
  */
 struct vnodeop_desc {
        int     vdesc_offset;           /* offset in vector--first for speed */

-       char    *vdesc_name;            /* a readable name for debugging */
+       const char *vdesc_name;         /* a readable name for debugging */

        int     vdesc_flags;            /* VDESC_* flags */
 
        /*
        int     vdesc_flags;            /* VDESC_* flags */
 
        /*


@@ -268,10 +301,6 @@ struct vnodeop_desc {
  */
 extern struct vnodeop_desc *vnodeop_descs[];
 
  */
 extern struct vnodeop_desc *vnodeop_descs[];
 

-/*
- * Interlock for scanning list of vnodes attached to a mountpoint
- */
-extern void * mntvnode_slock;

 
 /*
  * This macro is very helpful in defining those offsets in the vdesc struct.
 
 /*
  * This macro is very helpful in defining those offsets in the vdesc struct.


@@ -303,32 +332,40 @@ extern void * mntvnode_slock;
 #define VDESC(OP) (& __CONCAT(OP,_desc))
 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
 
 #define VDESC(OP) (& __CONCAT(OP,_desc))
 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
 

+struct ostat;

 
 

+#define BUILDPATH_NO_FS_ENTER 0x1 /* Use cache values, do not enter file system */
+int    build_path(vnode_t first_vp, char *buff, int buflen, int *outlen, int flags, vfs_context_t ctx);

 
 

-int    build_path(vnode_t first_vp, char *buff, int buflen, int *outlen);

 int    bdevvp(dev_t dev, struct vnode **vpp);
 void   cvtstat(struct stat *st, struct ostat *ost);
 void   vprint(const char *label, struct vnode *vp);
 
 
 int    bdevvp(dev_t dev, struct vnode **vpp);
 void   cvtstat(struct stat *st, struct ostat *ost);
 void   vprint(const char *label, struct vnode *vp);
 
 

-__private_extern__ int is_package_name(char *name, int len);
+__private_extern__ int is_package_name(const char *name, int len);

 __private_extern__ int set_package_extensions_table(void *data, int nentries, int maxwidth);
 int    vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base,
                        int len, off_t offset, enum uio_seg segflg, int ioflg,
 __private_extern__ int set_package_extensions_table(void *data, int nentries, int maxwidth);
 int    vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base,
                        int len, off_t offset, enum uio_seg segflg, int ioflg,

-                       struct ucred *cred, int *aresid, struct proc *p);
+                       kauth_cred_t cred, int *aresid, struct proc *p);

 int    vn_rdwr_64(enum uio_rw rw, struct vnode *vp, uint64_t base,
                        int64_t len, off_t offset, enum uio_seg segflg,
 int    vn_rdwr_64(enum uio_rw rw, struct vnode *vp, uint64_t base,
                        int64_t len, off_t offset, enum uio_seg segflg,

-                       int ioflg, struct ucred *cred, int *aresid,
+                       int ioflg, kauth_cred_t cred, int *aresid,

                        struct proc *p);
                        struct proc *p);

+#if CONFIG_MACF
+int    vn_setlabel (struct vnode *vp, struct label *intlabel,
+           vfs_context_t context);
+#endif

 void   fifo_printinfo(struct vnode *vp);
 int    vn_lock(struct vnode *vp, int flags, struct proc *p);
 int    vn_open(struct nameidata *ndp, int fmode, int cmode);
 int    vn_open_modflags(struct nameidata *ndp, int *fmode, int cmode);
 int    vn_open_auth(struct nameidata *ndp, int *fmode, struct vnode_attr *);
 void   fifo_printinfo(struct vnode *vp);
 int    vn_lock(struct vnode *vp, int flags, struct proc *p);
 int    vn_open(struct nameidata *ndp, int fmode, int cmode);
 int    vn_open_modflags(struct nameidata *ndp, int *fmode, int cmode);
 int    vn_open_auth(struct nameidata *ndp, int *fmode, struct vnode_attr *);

-int    vn_close(vnode_t, int flags, struct ucred *cred, struct proc *p);
+int    vn_close(vnode_t, int flags, vfs_context_t ctx);

 
 #define VN_CREATE_NOAUTH               (1<<0)
 #define VN_CREATE_NOINHERIT            (1<<1)
 
 #define VN_CREATE_NOAUTH               (1<<0)
 #define VN_CREATE_NOINHERIT            (1<<1)

+#define VN_CREATE_UNION                        (1<<2)
+#define        VN_CREATE_NOLABEL               (1<<3)

 errno_t vn_create(vnode_t, vnode_t *, struct componentname *, struct vnode_attr *, int flags, vfs_context_t);
 
 
 errno_t vn_create(vnode_t, vnode_t *, struct componentname *, struct vnode_attr *, int flags, vfs_context_t);
 
 


@@ -337,22 +374,46 @@ int       vn_setxattr(vnode_t, const char *, uio_t, int, vfs_context_t);
 int    vn_removexattr(vnode_t, const char *, int, vfs_context_t);
 int    vn_listxattr(vnode_t, uio_t, size_t *, int, vfs_context_t);
 
 int    vn_removexattr(vnode_t, const char *, int, vfs_context_t);
 int    vn_listxattr(vnode_t, uio_t, size_t *, int, vfs_context_t);
 

+int    default_getxattr(vnode_t, const char *, uio_t, size_t *, int, vfs_context_t);
+int    default_setxattr(vnode_t, const char *, uio_t, int, vfs_context_t);
+int    default_removexattr(vnode_t, const char *, int, vfs_context_t);
+
+#if NAMEDSTREAMS
+errno_t  vnode_getnamedstream(vnode_t, vnode_t *, const char *, enum nsoperation, int, vfs_context_t);
+errno_t  vnode_makenamedstream(vnode_t, vnode_t *, const char *, int, vfs_context_t);
+errno_t  vnode_removenamedstream(vnode_t, vnode_t, const char *, int, vfs_context_t);
+errno_t  vnode_flushnamedstream(vnode_t vp, vnode_t svp, vfs_context_t context);
+errno_t  vnode_relenamedstream(vnode_t vp, vnode_t svp, vfs_context_t context);
+#endif
+
+int vn_path_package_check(vnode_t vp, char *path, int pathlen, int *component);
+
+void   nchinit(void) __attribute__((section("__TEXT, initcode")));
+int    resize_namecache(u_int newsize);
+void   name_cache_lock_shared(void);

 void   name_cache_lock(void);
 void   name_cache_unlock(void);
 void   name_cache_lock(void);
 void   name_cache_unlock(void);

+void   cache_enter_with_gen(vnode_t dvp, vnode_t vp, struct componentname *cnp, int gen);

 
 

-char * vnode_getname(vnode_t vp);
-void   vnode_putname(char *name);
+const char     *vnode_getname(vnode_t vp);
+void   vnode_putname(const char *name);

 
 vnode_t        vnode_getparent(vnode_t vp);
 
 int vn_pathconf(vnode_t, int, register_t *, vfs_context_t);
 
 
 vnode_t        vnode_getparent(vnode_t vp);
 
 int vn_pathconf(vnode_t, int, register_t *, vfs_context_t);
 

+#define        vnode_lock_convert(v)   lck_mtx_convert_spin(&(v)->v_lock)
+
+void   vnode_lock_spin(vnode_t);
+
+

 void   vnode_list_lock(void);
 void   vnode_list_unlock(void);
 int    vnode_ref_ext(vnode_t, int);
 void   vnode_rele_ext(vnode_t, int, int);
 void   vnode_rele_internal(vnode_t, int, int, int);
 int    vnode_getwithref(vnode_t);
 void   vnode_list_lock(void);
 void   vnode_list_unlock(void);
 int    vnode_ref_ext(vnode_t, int);
 void   vnode_rele_ext(vnode_t, int, int);
 void   vnode_rele_internal(vnode_t, int, int, int);
 int    vnode_getwithref(vnode_t);

+int    vnode_get_locked(vnode_t);

 int    vnode_put_locked(vnode_t);
 
 int    vnode_issock(vnode_t);
 int    vnode_put_locked(vnode_t);
 
 int    vnode_issock(vnode_t);


@@ -361,16 +422,33 @@ void      unlock_fsnode(vnode_t, int *);
 int    lock_fsnode(vnode_t, int *);
 
 errno_t        vnode_resume(vnode_t);
 int    lock_fsnode(vnode_t, int *);
 
 errno_t        vnode_resume(vnode_t);

+errno_t        vnode_suspend(vnode_t);
+

 
 errno_t        vnode_size(vnode_t, off_t *, vfs_context_t);
 errno_t        vnode_setsize(vnode_t, off_t, int ioflag, vfs_context_t);
 int    vnode_setattr_fallback(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx);
 
 
 errno_t        vnode_size(vnode_t, off_t *, vfs_context_t);
 errno_t        vnode_setsize(vnode_t, off_t, int ioflag, vfs_context_t);
 int    vnode_setattr_fallback(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx);
 

+void vn_setunionwait(vnode_t);
+void vn_checkunionwait(vnode_t);
+void vn_clearunionwait(vnode_t, int);
+

 void SPECHASH_LOCK(void);
 void SPECHASH_UNLOCK(void);
 
 int check_cdevmounted(dev_t, enum vtype, int *);
 
 void SPECHASH_LOCK(void);
 void SPECHASH_UNLOCK(void);
 
 int check_cdevmounted(dev_t, enum vtype, int *);
 

-void   vnode_authorize_init(void);
+void   vnode_authorize_init(void) __attribute__((section("__TEXT, initcode")));
+
+void   vfsinit(void);
+
+/*
+ * XXX exported symbols; should be static
+ */
+void   vfs_op_init(void) __attribute__((section("__TEXT, initcode")));
+void   vfs_opv_init(void) __attribute__((section("__TEXT, initcode")));
+int    vfs_sysctl(int *name, u_int namelen, user_addr_t oldp, size_t *oldlenp,
+               user_addr_t newp, size_t newlen, struct proc *p);
+int    sysctl_vnode(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);

 
 #endif /* !_SYS_VNODE_INTERNAL_H_ */
 
 #endif /* !_SYS_VNODE_INTERNAL_H_ */