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 d80eb21c865e35a6159acb921df021339dc33eee..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@
  * 
@@ -79,9 +79,19 @@
 #include <sys/buf.h>
 #include <sys/lock.h>
 
-
 #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.
  */
@@ -125,9 +135,7 @@ struct buf {
 #ifdef BUF_MAKE_PRIVATE
        buf_t   b_data_store;
 #endif
-#if CONFIG_PROTECT
-       struct cprotect *b_cpentry;     /* address of cp_entry, to be passed further down  */
-#endif /* CONFIG_PROTECT */
+       struct bufattr b_attr;
 #ifdef JOE_DEBUG
         void * b_owner;
         int     b_tag;
@@ -152,7 +160,7 @@ struct buf {
 #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. */
@@ -163,20 +171,20 @@ struct buf {
 #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 */
-#define BUF_MAX_GC_COUNT       1024    /* Generally 6-8 MB */
-#define BUF_MAX_GC_BATCH_SIZE  128     /* Under a single grab of the lock */
+#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 |\
                       B_META | B_CLUSTER | B_DELWRI | B_FUA | B_PASSIVE | B_IOSTREAMING | B_THROTTLED_IO |\
-                      B_ENCRYPTED_IO)
+                      B_ENCRYPTED_IO | B_STATICCONTENT)
 /*
  * mask used by buf_clearflags/buf_setflags... these are the writable external flags
  */
@@ -218,6 +226,16 @@ struct buf {
 #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 */
@@ -267,10 +285,18 @@ errno_t   buf_acquire(buf_t, int, int, int);
 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