/*
- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
#include <sys/lock.h>
-extern lck_mtx_t *buf_mtxp;
#define NOLIST ((struct buf *)0x87654321)
/*
daddr64_t b_lblkno; /* Logical block number. */
daddr64_t b_blkno; /* Underlying physical block number. */
void (*b_iodone)(buf_t, void *); /* Function to call upon completion. */
- vnode_t b_vp; /* Device vnode. */
- struct ucred *b_rcred; /* Read credentials reference. */
- struct ucred *b_wcred; /* Write credentials reference. */
+ vnode_t b_vp; /* File vnode for data, device vnode for metadata. */
+ kauth_cred_t b_rcred; /* Read credentials reference. */
+ kauth_cred_t b_wcred; /* Write credentials reference. */
void * b_upl; /* Pointer to UPL */
buf_t b_real_bp; /* used to track bp generated through cluster_bp */
TAILQ_ENTRY(buf) b_act; /* Device driver queue when active */
#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...
#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 */
/*
* mask used by buf_flags... these are the readable external flags
*/
-#define BUF_X_RDFLAGS (B_CLUSTER | B_PHYS | B_LOCKED | B_DELWRI | B_ASYNC |\
- B_READ | B_WRITE | B_META | B_PAGEIO)
+#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)
/*
* mask used by buf_clearflags/buf_setflags... these are the writable external flags
*/
-#define BUF_X_WRFLAGS (B_LOCKED | B_NOCACHE | B_ASYNC | B_READ | B_WRITE | B_PAGEIO)
+#define BUF_X_WRFLAGS (B_PHYS | B_RAW | B_LOCKED | B_ASYNC | B_READ | B_WRITE | B_PAGEIO |\
+ B_NOCACHE | B_FUA | B_PASSIVE)
/*
* These flags are kept in b_flags... access is lockless
#define B_AGE 0x00200000 /* Move to age queue when I/O done. */
#define B_FILTER 0x00400000 /* call b_iodone from biodone as an in-line filter */
#define B_CALL 0x00800000 /* Call b_iodone from biodone, assumes b_iodone consumes bp */
-#define B_RAW 0x01000000 /* Set by physio for raw transfers. */
+#define B_EOT 0x01000000 /* last buffer in a transaction list created by cluster_io */
#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 */
#define B_NOBUFF 0x04 /* Do not allocate struct buf */
-extern int niobuf; /* The number of IO buffer headers for cluster IO */
-extern int nbuf; /* The number of buffer headers */
-extern struct buf *buf; /* The buffer headers. */
+extern int niobuf_headers; /* The number of IO buffer headers for cluster IO */
+extern int nbuf_headers; /* The number of buffer headers */
+extern int max_nbuf_headers; /* The max number of buffer headers */
+extern int nbuf_hashelements; /* The number of elements in bufhash */
+extern struct buf *buf_headers; /* The buffer headers. */
/*
void free_io_buf(buf_t);
int allocbuf(struct buf *, int);
-void bufinit(void);
+void bufinit(void) __attribute__((section("__TEXT, initcode")));
void buf_setfilter(buf_t, void (*)(buf_t, void *), void *, void **, void **);
#define BAC_SKIP_NONLOCKED 0x04 /* Don't return LOCKED buffers */
#define BAC_SKIP_LOCKED 0x08 /* Only return LOCKED buffers */
-void cluster_init(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);
projects / apple / xnu.git / blobdiff