xnu-2782.10.72.tar.gz

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

diff --git a/bsd/sys/vnode.h b/bsd/sys/vnode.h
index 965518cb08a0a266196a5a3b2ebd95e717550beb..72e1a85321b7edd5f695550264ace158c452fd61 100644 (file)
--- a/bsd/sys/vnode.h
+++ b/bsd/sys/vnode.h
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.

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


@@ -68,6 +68,7 @@
 #include <sys/cdefs.h>
 #ifdef KERNEL
 #include <sys/kernel_types.h>
 #include <sys/cdefs.h>
 #ifdef KERNEL
 #include <sys/kernel_types.h>

+#include <sys/param.h>

 #include <sys/signal.h>
 #endif
 
 #include <sys/signal.h>
 #endif
 


@@ -80,8 +81,14 @@
 /*
  * Vnode types.  VNON means no type.
  */
 /*
  * Vnode types.  VNON means no type.
  */

-enum vtype     { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD, VSTR,
-                         VCPLX };
+enum vtype     { 
+       /* 0 */
+       VNON, 
+       /* 1 - 5 */
+       VREG, VDIR, VBLK, VCHR, VLNK, 
+       /* 6 - 10 */
+       VSOCK, VFIFO, VBAD, VSTR, VCPLX 
+};

 
 /*
  * Vnode tag types.
 
 /*
  * Vnode tag types.


@@ -89,10 +96,21 @@ enum vtype  { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD, VSTR,
  * and should NEVER be inspected by the kernel.
  */
 enum vtagtype  {
  * and should NEVER be inspected by the kernel.
  */
 enum vtagtype  {

-       VT_NON, VT_UFS, VT_NFS, VT_MFS, VT_MSDOSFS, VT_LFS, VT_LOFS, VT_FDESC,
-       VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS,
-       VT_UNION, VT_HFS, VT_ZFS, VT_DEVFS, VT_WEBDAV, VT_UDF, VT_AFP,
-       VT_CDDA, VT_CIFS, VT_OTHER};
+       /* 0 */
+       VT_NON,
+       /* 1 reserved, overlaps with (CTL_VFS, VFS_NUMMNTOPS) */
+       VT_UFS,
+       /* 2 - 5 */
+       VT_NFS, VT_MFS, VT_MSDOSFS, VT_LFS,
+       /* 6 - 10 */
+       VT_LOFS, VT_FDESC, VT_PORTAL, VT_NULL, VT_UMAP, 
+       /* 11 - 15 */
+       VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, VT_MOCKFS,
+       /* 16 - 20 */
+       VT_HFS, VT_ZFS, VT_DEVFS, VT_WEBDAV, VT_UDF, 
+       /* 21 - 24 */
+       VT_AFP, VT_CDDA, VT_CIFS, VT_OTHER
+};

 
 
 /*
 
 
 /*


@@ -145,8 +163,13 @@ enum vtagtype      {
 #define IO_BACKGROUND IO_PASSIVE /* used for backward compatibility.  to be removed after IO_BACKGROUND is no longer
                                                                  * used by DiskImages in-kernel mode */
 #define        IO_NOAUTH       0x8000          /* No authorization checks. */
 #define IO_BACKGROUND IO_PASSIVE /* used for backward compatibility.  to be removed after IO_BACKGROUND is no longer
                                                                  * used by DiskImages in-kernel mode */
 #define        IO_NOAUTH       0x8000          /* No authorization checks. */

-#define IO_NODIRECT    0x10000         /* don't use direct synchronous writes if IO_NOCACHE is specified */
-
+#define IO_NODIRECT     0x10000                /* don't use direct synchronous writes if IO_NOCACHE is specified */
+#define IO_ENCRYPTED   0x20000         /* Retrieve encrypted blocks from the filesystem */
+#define IO_RETURN_ON_THROTTLE  0x40000
+#define IO_SINGLE_WRITER       0x80000
+#define IO_SYSCALL_DISPATCH            0x100000        /* I/O was originated from a file table syscall */
+#define IO_SWAP_DISPATCH               0x200000        /* I/O was originated from the swap layer */
+#define IO_SKIP_ENCRYPTION             0x400000        /* Skips en(de)cryption on the IO. Must be initiated from kernel */

 
 /*
  * Component Name: this structure describes the pathname
 
 /*
  * Component Name: this structure describes the pathname


@@ -194,7 +217,6 @@ struct componentname {
  * component name operational modifier flags
  */
 #define        FOLLOW          0x00000040 /* follow symbolic links */
  * component name operational modifier flags
  */
 #define        FOLLOW          0x00000040 /* follow symbolic links */

-#define NOTRIGGER      0x10000000 /* don't trigger automounts */

 
 /*
  * component name parameter descriptors.
 
 /*
  * component name parameter descriptors.


@@ -202,9 +224,6 @@ struct componentname {
 #define        ISDOTDOT        0x00002000 /* current component name is .. */
 #define        MAKEENTRY       0x00004000 /* entry is to be added to name cache */
 #define        ISLASTCN        0x00008000 /* this is last component of pathname */
 #define        ISDOTDOT        0x00002000 /* current component name is .. */
 #define        MAKEENTRY       0x00004000 /* entry is to be added to name cache */
 #define        ISLASTCN        0x00008000 /* this is last component of pathname */

-#define        ISWHITEOUT      0x00020000 /* OBSOLETE: found whiteout */
-#define        DOWHITEOUT      0x00040000 /* OBSOLETE: do whiteouts */
-

 
 /* The following structure specifies a vnode for creation */
 struct vnode_fsparam {
 
 /* The following structure specifies a vnode for creation */
 struct vnode_fsparam {


@@ -275,12 +294,6 @@ enum path_operation        {
        OP_MAXOP        /* anything beyond previous entry is invalid */
 };
 
        OP_MAXOP        /* anything beyond previous entry is invalid */
 };
 

-/*
- * is operation a traditional trigger (autofs)?
- * 1 if trigger, 0 if no trigger
- */
-extern int vfs_istraditionaltrigger(enum path_operation op, const struct componentname *cnp);
-

 /*!
  @enum resolver status
  @abstract Constants defining resolver status
 /*!
  @enum resolver status
  @abstract Constants defining resolver status


@@ -466,12 +479,13 @@ struct vnode_trigger_param {
  * Note that this structure may be extended, but existing fields must not move.
  */
 
  * Note that this structure may be extended, but existing fields must not move.
  */
 

-#define VATTR_INIT(v)                  do {(v)->va_supported = (v)->va_active = 0ll; (v)->va_vaflags = 0;} while(0)
+#define VATTR_INIT(v)                  do {(v)->va_supported = (v)->va_active = 0ll; (v)->va_vaflags = 0; } while(0)

 #define VATTR_SET_ACTIVE(v, a)         ((v)->va_active |= VNODE_ATTR_ ## a)
 #define VATTR_SET_SUPPORTED(v, a)      ((v)->va_supported |= VNODE_ATTR_ ## a)
 #define VATTR_IS_SUPPORTED(v, a)       ((v)->va_supported & VNODE_ATTR_ ## a)
 #define VATTR_CLEAR_ACTIVE(v, a)       ((v)->va_active &= ~VNODE_ATTR_ ## a)
 #define VATTR_CLEAR_SUPPORTED(v, a)    ((v)->va_supported &= ~VNODE_ATTR_ ## a)
 #define VATTR_SET_ACTIVE(v, a)         ((v)->va_active |= VNODE_ATTR_ ## a)
 #define VATTR_SET_SUPPORTED(v, a)      ((v)->va_supported |= VNODE_ATTR_ ## a)
 #define VATTR_IS_SUPPORTED(v, a)       ((v)->va_supported & VNODE_ATTR_ ## a)
 #define VATTR_CLEAR_ACTIVE(v, a)       ((v)->va_active &= ~VNODE_ATTR_ ## a)
 #define VATTR_CLEAR_SUPPORTED(v, a)    ((v)->va_supported &= ~VNODE_ATTR_ ## a)

+#define VATTR_CLEAR_SUPPORTED_ALL(v)   ((v)->va_supported = 0)

 #define VATTR_IS_ACTIVE(v, a)          ((v)->va_active & VNODE_ATTR_ ## a)
 #define VATTR_ALL_SUPPORTED(v)         (((v)->va_active & (v)->va_supported) == (v)->va_active)
 #define VATTR_INACTIVE_SUPPORTED(v)    do {(v)->va_active &= ~(v)->va_supported; (v)->va_supported = 0;} while(0)
 #define VATTR_IS_ACTIVE(v, a)          ((v)->va_active & VNODE_ATTR_ ## a)
 #define VATTR_ALL_SUPPORTED(v)         (((v)->va_active & (v)->va_supported) == (v)->va_active)
 #define VATTR_INACTIVE_SUPPORTED(v)    do {(v)->va_active &= ~(v)->va_supported; (v)->va_supported = 0;} while(0)


@@ -516,7 +530,19 @@ struct vnode_trigger_param {
 #define VNODE_ATTR_va_guuid            (1LL<<27)       /* 08000000 */
 #define VNODE_ATTR_va_nchildren                (1LL<<28)       /* 10000000 */
 #define VNODE_ATTR_va_dirlinkcount     (1LL<<29)       /* 20000000 */
 #define VNODE_ATTR_va_guuid            (1LL<<27)       /* 08000000 */
 #define VNODE_ATTR_va_nchildren                (1LL<<28)       /* 10000000 */
 #define VNODE_ATTR_va_dirlinkcount     (1LL<<29)       /* 20000000 */

-#define VNODE_ATTR_va_addedtime                (1LL<<30)               /* 40000000 */
+#define VNODE_ATTR_va_addedtime                (1LL<<30)       /* 40000000 */
+#define VNODE_ATTR_va_dataprotect_class        (1LL<<31)       /* 80000000 */
+#define VNODE_ATTR_va_dataprotect_flags        (1LL<<32)       /* 100000000 */
+#define VNODE_ATTR_va_document_id      (1LL<<33)       /* 200000000 */
+#define VNODE_ATTR_va_devid            (1LL<<34)       /* 400000000 */
+#define VNODE_ATTR_va_objtype          (1LL<<35)       /* 800000000 */
+#define VNODE_ATTR_va_objtag           (1LL<<36)       /* 1000000000 */
+#define VNODE_ATTR_va_user_access      (1LL<<37)       /* 2000000000 */
+#define VNODE_ATTR_va_finderinfo       (1LL<<38)       /* 4000000000 */
+#define VNODE_ATTR_va_rsrc_length      (1LL<<39)       /* 8000000000 */
+#define VNODE_ATTR_va_rsrc_alloc       (1LL<<40)       /* 10000000000 */
+#define VNODE_ATTR_va_fsid64           (1LL<<41)       /* 20000000000 */
+#define VNODE_ATTR_va_write_gencount    (1LL<<42)      /* 40000000000 */

 
 #define VNODE_ATTR_BIT(n)      (VNODE_ATTR_ ## n)
 /*
 
 #define VNODE_ATTR_BIT(n)      (VNODE_ATTR_ ## n)
 /*


@@ -537,8 +563,17 @@ struct vnode_trigger_param {
                                VNODE_ATTR_BIT(va_name) |               \
                                VNODE_ATTR_BIT(va_type) |               \
                                VNODE_ATTR_BIT(va_nchildren) |          \
                                VNODE_ATTR_BIT(va_name) |               \
                                VNODE_ATTR_BIT(va_type) |               \
                                VNODE_ATTR_BIT(va_nchildren) |          \

-                               VNODE_ATTR_BIT(va_dirlinkcount)|                \
-                VNODE_ATTR_BIT(va_addedtime)) 
+                               VNODE_ATTR_BIT(va_dirlinkcount) |       \
+                               VNODE_ATTR_BIT(va_addedtime) |          \
+                               VNODE_ATTR_BIT(va_devid) |              \
+                               VNODE_ATTR_BIT(va_objtype) |            \
+                               VNODE_ATTR_BIT(va_objtag) |             \
+                               VNODE_ATTR_BIT(va_user_access) |        \
+                               VNODE_ATTR_BIT(va_finderinfo) |         \
+                               VNODE_ATTR_BIT(va_rsrc_length) |        \
+                               VNODE_ATTR_BIT(va_rsrc_alloc) |         \
+                               VNODE_ATTR_BIT(va_fsid64) |             \
+                               VNODE_ATTR_BIT(va_write_gencount))

 /*
  * Attributes that can be applied to a new file object.
  */
 /*
  * Attributes that can be applied to a new file object.
  */


@@ -554,8 +589,12 @@ struct vnode_trigger_param {
                                VNODE_ATTR_BIT(va_encoding) |           \
                                VNODE_ATTR_BIT(va_type) |               \
                                VNODE_ATTR_BIT(va_uuuid) |              \
                                VNODE_ATTR_BIT(va_encoding) |           \
                                VNODE_ATTR_BIT(va_type) |               \
                                VNODE_ATTR_BIT(va_uuuid) |              \

-                               VNODE_ATTR_BIT(va_guuid))
+                               VNODE_ATTR_BIT(va_guuid) |              \
+                               VNODE_ATTR_BIT(va_dataprotect_class) |  \
+                               VNODE_ATTR_BIT(va_dataprotect_flags) |  \
+                               VNODE_ATTR_BIT(va_document_id))

 
 

+#include <sys/_types/_fsid_t.h>

 
 struct vnode_attr {
        /* bitfields */
 
 struct vnode_attr {
        /* bitfields */


@@ -611,17 +650,43 @@ struct vnode_attr {
        uint64_t        va_nchildren;     /* Number of items in a directory */
        uint64_t        va_dirlinkcount;  /* Real references to dir (i.e. excluding "." and ".." refs) */
 
        uint64_t        va_nchildren;     /* Number of items in a directory */
        uint64_t        va_dirlinkcount;  /* Real references to dir (i.e. excluding "." and ".." refs) */
 

-       /* add new fields here only */

 #ifdef BSD_KERNEL_PRIVATE
        struct kauth_acl *va_base_acl;
 #else
        void *          va_reserved1;
 #endif /* BSD_KERNEL_PRIVATE */
 #ifdef BSD_KERNEL_PRIVATE
        struct kauth_acl *va_base_acl;
 #else
        void *          va_reserved1;
 #endif /* BSD_KERNEL_PRIVATE */

-    struct timespec va_addedtime;      /* timestamp when item was added to parent directory */
-
+       struct timespec va_addedtime;   /* timestamp when item was added to parent directory */

                
                

+       /* Data Protection fields */
+       uint32_t va_dataprotect_class;  /* class specified for this file if it didn't exist */
+       uint32_t va_dataprotect_flags;  /* flags from NP open(2) to the filesystem */
+
+       /* Document revision tracking */
+       uint32_t va_document_id;
+
+       /* Fields for Bulk args */
+       uint32_t        va_devid;       /* devid of filesystem */
+       uint32_t        va_objtype;     /* type of object */
+       uint32_t        va_objtag;      /* vnode tag of filesystem */
+       uint32_t        va_user_access; /* access for user */
+       uint8_t         va_finderinfo[32];      /* Finder Info */
+       uint64_t        va_rsrc_length; /* Resource Fork length */
+       uint64_t        va_rsrc_alloc;  /* Resource Fork allocation size */
+       fsid_t          va_fsid64;      /* fsid, of the correct type  */
+
+       uint32_t va_write_gencount;     /* counter that increments each time the file changes */
+
+       /* add new fields here only */

 };
 
 };
 

+#ifdef BSD_KERNEL_PRIVATE
+/* 
+ * Flags for va_dataprotect_flags
+ */
+#define VA_DP_RAWENCRYPTED 0x0001
+
+#endif
+

 /*
  * Flags for va_vaflags.
  */
 /*
  * Flags for va_vaflags.
  */


@@ -666,14 +731,15 @@ extern int                vttoif_tab[];
 
 #define        REVOKEALL       0x0001          /* vnop_revoke: revoke all aliases */
 
 
 #define        REVOKEALL       0x0001          /* vnop_revoke: revoke all aliases */
 

-/* VNOP_REMOVE: do not delete busy files (Carbon remove file semantics) */
-#define VNODE_REMOVE_NODELETEBUSY  0x0001  
+/* VNOP_REMOVE/unlink flags */
+#define VNODE_REMOVE_NODELETEBUSY                      0x0001 /* Don't delete busy files (Carbon) */  
+#define VNODE_REMOVE_SKIP_NAMESPACE_EVENT      0x0002 /* Do not upcall to userland handlers */

 
 /* VNOP_READDIR flags: */
 #define VNODE_READDIR_EXTENDED    0x0001   /* use extended directory entries */
 #define VNODE_READDIR_REQSEEKOFF  0x0002   /* requires seek offset (cookies) */
 #define VNODE_READDIR_SEEKOFF32   0x0004   /* seek offset values should fit in 32 bits */
 
 /* VNOP_READDIR flags: */
 #define VNODE_READDIR_EXTENDED    0x0001   /* use extended directory entries */
 #define VNODE_READDIR_REQSEEKOFF  0x0002   /* requires seek offset (cookies) */
 #define VNODE_READDIR_SEEKOFF32   0x0004   /* seek offset values should fit in 32 bits */

-
+#define VNODE_READDIR_NAMEMAX     0x0008   /* For extended readdir, try to limit names to NAME_MAX bytes */

 
 #define        NULLVP  ((struct vnode *)NULL)
 
 
 #define        NULLVP  ((struct vnode *)NULL)
 


@@ -1176,7 +1242,7 @@ proc_t    vfs_context_proc(vfs_context_t);
  @abstract Get the credential associated with a vfs_context_t.
  @discussion Succeeds if and only if the context has a thread, the thread has a task, and the task has a BSD proc.
  @param ctx Context whose associated process to find.
  @abstract Get the credential associated with a vfs_context_t.
  @discussion Succeeds if and only if the context has a thread, the thread has a task, and the task has a BSD proc.
  @param ctx Context whose associated process to find.

- @return Process if available, NULL otherwise.
+ @returns credential if process available; NULL otherwise

  */
 kauth_cred_t   vfs_context_ucred(vfs_context_t);
 
  */
 kauth_cred_t   vfs_context_ucred(vfs_context_t);
 


@@ -1575,7 +1641,6 @@ int vn_getpath(struct vnode *vp, char *pathbuf, int *len);
  */
 #define VNODE_LOOKUP_NOFOLLOW          0x01
 #define        VNODE_LOOKUP_NOCROSSMOUNT       0x02
  */
 #define VNODE_LOOKUP_NOFOLLOW          0x01
 #define        VNODE_LOOKUP_NOCROSSMOUNT       0x02

-#define VNODE_LOOKUP_DOWHITEOUT                0x04    /* OBSOLETE */

 /*!
  @function vnode_lookup
  @abstract Convert a path into a vnode.
 /*!
  @function vnode_lookup
  @abstract Convert a path into a vnode.


@@ -1823,6 +1888,35 @@ void     vnode_putname(const char *name);
  */
 vnode_t        vnode_getparent(vnode_t vp);
 
  */
 vnode_t        vnode_getparent(vnode_t vp);
 

+/*!
+ @function vnode_setdirty
+ @abstract Mark the vnode as having data or metadata that needs to be written out during reclaim
+ @discussion The vnode should be marked as dirty anytime a file system defers flushing of data or meta-data associated with it. 
+ @param the vnode to mark as dirty
+ @return 0 if successful else an error code.
+ */
+int    vnode_setdirty(vnode_t);
+
+/*!
+ @function vnode_cleardirty
+ @abstract Mark the vnode as clean i.e. all its data or metadata has been flushed
+ @discussion The vnode should be marked as clean whenever the file system is done flushing data or meta-data associated with it.
+ @param the vnode to clear as being dirty
+ @return 0 if successful else an error code.
+ */
+int    vnode_cleardirty(vnode_t);
+
+/*!
+ @function vnode_isdirty
+ @abstract Determine if a vnode is marked dirty.
+ @discussion The vnode should be marked as clean whenever the file system is done flushing data or meta-data associated with it.
+ @param vp the vnode to test.
+ @return Non-zero if the vnode is dirty, 0 otherwise.
+ */
+int    vnode_isdirty(vnode_t);
+
+
+

 #ifdef KERNEL_PRIVATE
 /*! 
  @function vnode_lookup_continue_needed
 #ifdef KERNEL_PRIVATE
 /*! 
  @function vnode_lookup_continue_needed


@@ -1835,6 +1929,14 @@ vnode_t  vnode_getparent(vnode_t vp);
  @result 0 to indicate that a vnode can be opened, or an error that should be passed up to VFS.
  */
 int vnode_lookup_continue_needed(vnode_t vp, struct componentname *cnp);
  @result 0 to indicate that a vnode can be opened, or an error that should be passed up to VFS.
  */
 int vnode_lookup_continue_needed(vnode_t vp, struct componentname *cnp);

+
+/*!
+ @function vnode_istty
+ @abstract Determine if the given vnode represents a tty device.
+ @param vp Vnode to examine.
+ @result Non-zero to indicate that the vnode represents a tty device. Zero otherwise.
+ */
+int vnode_istty(vnode_t vp);

 #endif /* KERNEL_PRIVATE */
 
 #ifdef BSD_KERNEL_PRIVATE
 #endif /* KERNEL_PRIVATE */
 
 #ifdef BSD_KERNEL_PRIVATE


@@ -1864,7 +1966,7 @@ int       vnode_makeimode(int, int);
 enum vtype     vnode_iftovt(int);
 int    vnode_vttoif(enum vtype);
 int    vnode_isshadow(vnode_t);
 enum vtype     vnode_iftovt(int);
 int    vnode_vttoif(enum vtype);
 int    vnode_isshadow(vnode_t);

-int    vnode_istty(vnode_t vp);
+boolean_t vnode_on_reliable_media(vnode_t);

 /*
  * Indicate that a file has multiple hard links.  VFS will always call
  * VNOP_LOOKUP on this vnode.  Volfs will always ask for it's parent
 /*
  * Indicate that a file has multiple hard links.  VFS will always call
  * VNOP_LOOKUP on this vnode.  Volfs will always ask for it's parent


@@ -1872,16 +1974,65 @@ int     vnode_istty(vnode_t vp);
  */
 vnode_t vnode_parent(vnode_t);
 void vnode_setparent(vnode_t, vnode_t);
  */
 vnode_t vnode_parent(vnode_t);
 void vnode_setparent(vnode_t, vnode_t);

-const char * vnode_name(vnode_t);
+/*!
+ @function vnode_getname_printable
+ @abstract Get a non-null printable name of a vnode.
+ @Used to make sure a printable name is returned for all vnodes. If a name exists or can be artificially created, the routine creates a new entry in the VFS namecache. Otherwise, the function returns an artificially created vnode name which is safer and easier to use. vnode_putname_printable() should be used to release names obtained by this routine. 
+ @param vp The vnode whose name to grab.
+ @return The printable name.
+ */
+const char *vnode_getname_printable(vnode_t vp);
+
+/*!
+ @function vnode_putname_printable
+ @abstract Release a reference on a name from the VFS cache if it was added by the matching vnode_getname_printable() call.
+ @param name String to release.
+ @return void.
+ */
+void vnode_putname_printable(const char *name);

 void vnode_setname(vnode_t, char *);
 int vnode_isnoflush(vnode_t);
 void vnode_setnoflush(vnode_t);
 void vnode_clearnoflush(vnode_t);
 /* XXX temporary until we can arrive at a KPI for NFS, Seatbelt */
 thread_t vfs_context_thread(vfs_context_t);
 void vnode_setname(vnode_t, char *);
 int vnode_isnoflush(vnode_t);
 void vnode_setnoflush(vnode_t);
 void vnode_clearnoflush(vnode_t);
 /* XXX temporary until we can arrive at a KPI for NFS, Seatbelt */
 thread_t vfs_context_thread(vfs_context_t);

-
+#if CONFIG_IOSCHED
+vnode_t vnode_mountdevvp(vnode_t);
+#endif

 #endif /* BSD_KERNEL_PRIVATE */
 
 #endif /* BSD_KERNEL_PRIVATE */
 

+/*
+ * Helper functions for implementing VNOP_GETATTRLISTBULK for a filesystem
+ */
+
+/*!
+ @function vfs_setup_vattr_from_attrlist
+ @abstract Setup a vnode_attr structure given an attrlist structure.
+ @Used by a VNOP_GETATTRLISTBULK implementation to setup a vnode_attr structure from a attribute list. It also returns the fixed size of the attribute buffer required.
+ @param alp Pointer to attribute list structure.
+ @param vap Pointer to vnode_attr structure.
+ @param obj_vtype Type of object - If VNON is passed, then the type is ignored and common, file and dir attrs are used to initialise the vattrs. If set to VDIR, only common and directory attributes are used. For all other types, only common and file attrbutes are used.
+ @param attr_fixed_sizep. Returns the fixed length required in the attrbute buffer for the object. NULL should be passed if it is not required.
+ @param ctx vfs context of caller.
+ @return error.
+ */
+errno_t vfs_setup_vattr_from_attrlist(struct attrlist * /* alp */, struct vnode_attr * /* vap */, enum vtype /* obj_vtype */, ssize_t * /* attr_fixed_sizep */, vfs_context_t /* ctx */);
+
+/*!
+ @function vfs_attr_pack
+ @abstract Pack a vnode_attr structure into a buffer in the same format as getattrlist(2).
+ @Used by a VNOP_GETATTRLISTBULK implementation to pack data provided into a vnode_attr structure into a buffer the way getattrlist(2) does.
+ @param vp If available, the vnode for which the attributes are being given, NULL if vnode is not available (which will usually be the case for a VNOP_GETATTRLISTBULK implementation.
+ @param auio - a uio_t initialised with one iovec..
+ @param alp - Pointer to an attrlist structure.
+ @param options - options for call (same as options for getattrlistbulk(2)).
+ @param vap Pointer to a filled in vnode_attr structure. Data from the vnode_attr structure will be used to copy and lay out the data in the required format for getatrlistbulk(2) by this function.
+ @param fndesc Currently unused
+ @param ctx vfs context of caller.
+ @return error.
+ */
+errno_t vfs_attr_pack(vnode_t /* vp */, uio_t /* uio */, struct attrlist * /* alp */, uint64_t /* options */, struct vnode_attr * /* vap */, void * /* fndesc */, vfs_context_t /* ctx */);
+

 __END_DECLS
 
 #endif /* KERNEL */
 __END_DECLS
 
 #endif /* KERNEL */