xnu-2050.18.24.tar.gz

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

diff --git a/bsd/sys/buf_internal.h b/bsd/sys/buf_internal.h
index 6d3801a50f4e835dfb8a7ecb28510e1fd3114996..016632623e784d4fe3c07085c53e365bbf4396f8 100644 (file)
--- a/bsd/sys/buf_internal.h
+++ b/bsd/sys/buf_internal.h
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.

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


@@ -79,9 +79,19 @@
 #include <sys/buf.h>
 #include <sys/lock.h>
 
 #include <sys/buf.h>
 #include <sys/lock.h>
 

-

 #define NOLIST ((struct buf *)0x87654321)
 
 #define NOLIST ((struct buf *)0x87654321)
 

+/*
+ * Attributes of an I/O to be used by lower layers
+ */
+struct bufattr {
+#if CONFIG_PROTECT
+       struct cprotect *ba_cpentry;    /* address of cp_entry */
+       uint64_t ba_cp_file_off;        /* rounded file offset. See buf_setcpoff() for more comments */
+#endif
+       uint64_t ba_flags;      /* flags. Some are only in-use on embedded devices */
+};
+

 /*
  * The buffer header describes an I/O operation in the kernel.
  */
 /*
  * The buffer header describes an I/O operation in the kernel.
  */


@@ -115,7 +125,17 @@ struct buf {
        int     b_dirtyend;             /* Offset of end of dirty region. */
        int     b_validoff;             /* Offset in buffer of valid region. */
        int     b_validend;             /* Offset of end of valid region. */
        int     b_dirtyend;             /* Offset of end of dirty region. */
        int     b_validoff;             /* Offset in buffer of valid region. */
        int     b_validend;             /* Offset of end of valid region. */

+
+       /* store extra information related to redundancy of data, such as
+        * which redundancy copy to use, etc
+        */
+       uint32_t b_redundancy_flags;
+

        proc_t  b_proc;                 /* Associated proc; NULL if kernel. */
        proc_t  b_proc;                 /* Associated proc; NULL if kernel. */

+#ifdef BUF_MAKE_PRIVATE
+       buf_t   b_data_store;
+#endif
+       struct bufattr b_attr;

 #ifdef JOE_DEBUG
         void * b_owner;
         int     b_tag;
 #ifdef JOE_DEBUG
         void * b_owner;
         int     b_tag;


@@ -128,32 +148,43 @@ struct buf {
 
 /* cluster_io definitions for use with io bufs */
 #define b_uploffset  b_bufsize
 
 /* cluster_io definitions for use with io bufs */
 #define b_uploffset  b_bufsize

+#define b_orig      b_freelist.tqe_prev
+#define b_shadow     b_freelist.tqe_next
+#define        b_shadow_ref b_validoff
+#ifdef BUF_MAKE_PRIVATE
+#define b_data_ref   b_validend
+#endif

 #define b_trans_head b_freelist.tqe_prev
 #define b_trans_next b_freelist.tqe_next
 #define b_iostate    b_rcred
 #define b_cliodone   b_wcred
 
 /*
 #define b_trans_head b_freelist.tqe_prev
 #define b_trans_next b_freelist.tqe_next
 #define b_iostate    b_rcred
 #define b_cliodone   b_wcred
 
 /*

- * These flags are kept in b_lflags... 
+ * These flags are kept in b_lflags...

  * buf_mtxp must be held before examining/updating
  */
 #define        BL_BUSY         0x00000001      /* I/O in progress. */
 #define        BL_WANTED       0x00000002      /* Process wants this buffer. */
 #define BL_IOBUF       0x00000004      /* buffer allocated via 'buf_alloc' */
  * buf_mtxp must be held before examining/updating
  */
 #define        BL_BUSY         0x00000001      /* I/O in progress. */
 #define        BL_WANTED       0x00000002      /* Process wants this buffer. */
 #define BL_IOBUF       0x00000004      /* buffer allocated via 'buf_alloc' */

-#define BL_CALLDONE    0x00000008      /* callback routine on B_CALL bp has completed */

 #define BL_WANTDEALLOC 0x00000010      /* buffer should be put on empty list when clean */
 #define BL_WANTDEALLOC 0x00000010      /* buffer should be put on empty list when clean */

+#define BL_SHADOW      0x00000020
+#define BL_EXTERNAL    0x00000040
+#define BL_WAITSHADOW  0x00000080
+#define BL_IOBUF_ALLOC 0x00000100
+#define BL_WANTED_REF  0x00000200

 
 /*
  * Parameters for buffer cache garbage collection 
  */
 #define BUF_STALE_THRESHHOLD   30      /* Collect if untouched in the last 30 seconds */
 
 /*
  * Parameters for buffer cache garbage collection 
  */
 #define BUF_STALE_THRESHHOLD   30      /* Collect if untouched in the last 30 seconds */

-#define BUF_MAX_GC_COUNT       1000    /* Generally 6-8 MB */
+#define BUF_MAX_GC_BATCH_SIZE  64      /* Under a single grab of the lock */

 
 /*
  * mask used by buf_flags... these are the readable external flags
  */
 #define BUF_X_RDFLAGS (B_PHYS | B_RAW | B_LOCKED | B_ASYNC | B_READ | B_WRITE | B_PAGEIO |\
 
 /*
  * mask used by buf_flags... these are the readable external flags
  */
 #define BUF_X_RDFLAGS (B_PHYS | B_RAW | B_LOCKED | B_ASYNC | B_READ | B_WRITE | B_PAGEIO |\

-                      B_META | B_CLUSTER | B_DELWRI | B_FUA | B_PASSIVE | B_IOSTREAMING | B_THROTTLED_IO)
+                      B_META | B_CLUSTER | B_DELWRI | B_FUA | B_PASSIVE | B_IOSTREAMING | B_THROTTLED_IO |\
+                      B_ENCRYPTED_IO | B_STATICCONTENT)

 /*
  * mask used by buf_clearflags/buf_setflags... these are the writable external flags
  */
 /*
  * mask used by buf_clearflags/buf_setflags... these are the writable external flags
  */


@@ -186,15 +217,25 @@ struct buf {
 /*
  * private flags used by by the cluster layer
  */
 /*
  * private flags used by by the cluster layer
  */

-#define B_NEED_IODONE   0x20000000     /* need biodone on the real_bp associated with a cluster_io */
+#define B_TWANTED      0x20000000      /* but_t that is part of a cluster level transaction is wanted */

 #define B_COMMIT_UPL    0x40000000     /* commit/abort the UPL on I/O success/failure */
 #define B_COMMIT_UPL    0x40000000     /* commit/abort the UPL on I/O success/failure */

-
+#define B_TDONE                0x80000000      /* buf_t that is part of a cluster level transaction has completed */

 
 /* Flags to low-level allocation routines. */
 #define B_CLRBUF       0x01    /* Request allocated buffer be cleared. */
 #define B_SYNC         0x02    /* Do all allocations synchronously. */
 #define B_NOBUFF       0x04    /* Do not allocate struct buf */
 
 
 /* Flags to low-level allocation routines. */
 #define B_CLRBUF       0x01    /* Request allocated buffer be cleared. */
 #define B_SYNC         0x02    /* Do all allocations synchronously. */
 #define B_NOBUFF       0x04    /* Do not allocate struct buf */
 

+/*
+ * ba_flags (Buffer Attribute flags)
+ * Some of these may be in-use only on embedded devices.
+ */
+#define BA_RAW_ENCRYPTED_IO     0x00000001
+#define BA_THROTTLED_IO         0x00000002
+#define BA_DELAYIDLESLEEP       0x00000004     /* Process is marked to delay idle sleep on disk IO */
+#define BA_NOCACHE             0x00000008
+#define BA_META                        0x00000010
+

 
 extern int niobuf_headers;             /* The number of IO buffer headers for cluster IO */
 extern int nbuf_headers;               /* The number of buffer headers */
 
 extern int niobuf_headers;             /* The number of IO buffer headers for cluster IO */
 extern int nbuf_headers;               /* The number of buffer headers */


@@ -218,6 +259,8 @@ extern struct buf *buf_headers;             /* The buffer headers. */
 
 __BEGIN_DECLS
 
 
 __BEGIN_DECLS
 

+buf_t  buf_create_shadow_priv(buf_t bp, boolean_t force_copy, uintptr_t external_storage, void (*iodone)(buf_t, void *), void *arg);
+

 buf_t  alloc_io_buf(vnode_t, int);
 void   free_io_buf(buf_t);
 
 buf_t  alloc_io_buf(vnode_t, int);
 void   free_io_buf(buf_t);
 


@@ -235,8 +278,6 @@ void        bufinit(void) __attribute__((section("__TEXT, initcode")));
 void   buf_list_lock(void);
 void   buf_list_unlock(void);
 
 void   buf_list_lock(void);
 void   buf_list_unlock(void);
 

-void   buf_biowait_callback(buf_t);
-

 void   cluster_init(void) __attribute__((section("__TEXT, initcode")));
 void   buf_drop(buf_t);
 errno_t        buf_acquire(buf_t, int, int, int);
 void   cluster_init(void) __attribute__((section("__TEXT, initcode")));
 void   buf_drop(buf_t);
 errno_t        buf_acquire(buf_t, int, int, int);


@@ -244,6 +285,17 @@ errno_t    buf_acquire(buf_t, int, int, int);
 int    count_busy_buffers(void);
 int    count_lock_queue(void);
 
 int    count_busy_buffers(void);
 int    count_lock_queue(void);
 

+int buf_flushdirtyblks_skipinfo (vnode_t, int, int, const char *);
+void buf_wait_for_shadow_io (vnode_t, daddr64_t);
+
+#ifdef BUF_MAKE_PRIVATE
+errno_t        buf_make_private(buf_t bp);
+#endif
+
+#ifdef CONFIG_PROTECT
+void buf_setcpaddr(buf_t, struct cprotect *);
+void buf_setcpoff (buf_t, uint64_t);
+#endif

 
 __END_DECLS
 
 
 __END_DECLS