xnu-3789.1.32.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 6ff3284bc2b7256550522183c48854b612e1780b..18d0e1119615565fa5d95bda6fa88bb18969af8c 100644 (file)
--- a/bsd/sys/buf_internal.h
+++ b/bsd/sys/buf_internal.h
@@ -177,6 +177,7 @@ extern vm_offset_t buf_kernel_addrperm;
 #define BL_WAITSHADOW  0x00000080
 #define BL_IOBUF_ALLOC 0x00000100
 #define BL_WANTED_REF  0x00000200
+#define BL_IOBUF_VDEV  0x00000400      /* iobuf was for a diskimage */
 
 /*
  * Parameters for buffer cache garbage collection 
@@ -235,14 +236,9 @@ extern vm_offset_t buf_kernel_addrperm;
 #define        B_WASDIRTY      0x02000000      /* page was found dirty in the VM cache */
 #define        B_HDRALLOC      0x04000000      /* zone allocated buffer header */
 #define        B_ZALLOC        0x08000000      /* b_datap is zalloc()ed */
-/*
- * private flags used by the journal layer
- */
-#define        B_NORELSE       0x10000000      /* don't brelse() in bwrite() */
 /*
  * private flags used by by the cluster layer
  */
-#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 */
 
@@ -273,6 +269,8 @@ extern vm_offset_t buf_kernel_addrperm;
 
 #define BA_ISOCHRONOUS         0x00001000 /* device specific isochronous throughput to media */
 
+#define BA_STRATEGY_TRACKED_IO  0x00002000 /* tracked by spec_strategy */
+
 
 #define GET_BUFATTR_IO_TIER(bap)       ((bap->ba_flags & BA_IO_TIER_MASK) >> BA_IO_TIER_SHIFT)
 #define SET_BUFATTR_IO_TIER(bap, tier)                                         \
@@ -303,31 +301,18 @@ 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);
 
 int    allocbuf(struct buf *, int);
 void   bufinit(void);
 
-/*
- * Flags for buf_acquire
- */
-#define BAC_NOWAIT             0x01    /* Don't wait if buffer is busy */
-#define BAC_REMOVE             0x02    /* Remove from free list once buffer is acquired */
-#define BAC_SKIP_NONLOCKED     0x04    /* Don't return LOCKED buffers */
-#define BAC_SKIP_LOCKED                0x08    /* Only return LOCKED buffers */
-
 void   buf_list_lock(void);
 void   buf_list_unlock(void);
 
 void   cluster_init(void);
-void   buf_drop(buf_t);
-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);
@@ -356,6 +341,8 @@ struct bufstats {
        long    bufs_iobufmax;          /* Max. number of IO buffers used */
        long    bufs_iobufinuse;        /* number of IO buffers in use */
        long    bufs_iobufsleeps;       /* IO buffer starvation */
+       long    bufs_iobufinuse_vdev;   /* number of IO buffers in use by
+                                          diskimages */
 };
 
 #endif /* KERNEL */