/*
- * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#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.
*/
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. */
-#if CONFIG_PROTECT
- struct cprotect *b_cpentry; /* address of cp_entry, to be passed further down */
-#endif /* CONFIG_PROTECT */
+#ifdef BUF_MAKE_PRIVATE
+ buf_t b_data_store;
+#endif
+ struct bufattr b_attr;
#ifdef JOE_DEBUG
void * b_owner;
int b_tag;
/* 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
/*
- * 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' */
-#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
+#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 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 |\
- 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
*/
/*
* 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. */
#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 */
__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);
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);
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
projects / apple / xnu.git / blobdiff