xnu-1699.22.81.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 5718861f67633d5c49eab6d1bfc8fff9a66eb316..d80eb21c865e35a6159acb921df021339dc33eee 100644 (file)
--- a/bsd/sys/buf_internal.h
+++ b/bsd/sys/buf_internal.h
@@ -115,7 +115,16 @@ 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. */
+
+       /* 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. */
+#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 */
@@ -131,6 +140,12 @@ struct buf {
 
 /* 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
@@ -143,20 +158,25 @@ struct buf {
 #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_SHADOW      0x00000020
+#define BL_EXTERNAL    0x00000040
+#define BL_WAITSHADOW  0x00000080
+#define BL_IOBUF_ALLOC 0x00000100
 
 /*
  * 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_COUNT       1024    /* Generally 6-8 MB */
+#define BUF_MAX_GC_BATCH_SIZE  128     /* 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_META | B_CLUSTER | B_DELWRI | B_FUA | B_PASSIVE | B_IOSTREAMING | B_THROTTLED_IO |\
+                      B_ENCRYPTED_IO)
 /*
  * mask used by buf_clearflags/buf_setflags... these are the writable external flags
  */
@@ -189,11 +209,10 @@ struct buf {
 /*
  * 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_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. */
@@ -222,6 +241,8 @@ extern struct buf *buf_headers;             /* The buffer headers. */
 
 __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);
 
@@ -239,8 +260,6 @@ void        bufinit(void) __attribute__((section("__TEXT, initcode")));
 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);
@@ -248,6 +267,9 @@ errno_t     buf_acquire(buf_t, int, int, int);
 int    count_busy_buffers(void);
 int    count_lock_queue(void);
 
+#ifdef BUF_MAKE_PRIVATE
+errno_t        buf_make_private(buf_t bp);
+#endif
 
 __END_DECLS