| bio.h (10226) | bio.h (12404) |
|---|---|
| 1/* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 22 unchanged lines hidden (view full) --- 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)buf.h 8.7 (Berkeley) 1/21/94 | 1/* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 22 unchanged lines hidden (view full) --- 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)buf.h 8.7 (Berkeley) 1/21/94 |
| 39 * $Id: buf.h,v 1.20 1995/07/29 11:42:43 bde Exp $ | 39 * $Id: buf.h,v 1.21 1995/08/24 12:57:17 davidg Exp $ |
| 40 */ 41 42#ifndef _SYS_BUF_H_ 43#define _SYS_BUF_H_ 44#include <sys/queue.h> 45 46#define NOLIST ((struct buf *)0x87654321) 47 --- 31 unchanged lines hidden (view full) --- 79 void *b_saveaddr; /* Original b_addr for physio. */ 80 daddr_t b_lblkno; /* Logical block number. */ 81 daddr_t b_blkno; /* Underlying physical block number. */ 82 /* Function to call upon completion. */ 83 void (*b_iodone) __P((struct buf *)); 84 /* For nested b_iodone's. */ 85 struct iodone_chain *b_iodone_chain; 86 struct vnode *b_vp; /* Device vnode. */ | 40 */ 41 42#ifndef _SYS_BUF_H_ 43#define _SYS_BUF_H_ 44#include <sys/queue.h> 45 46#define NOLIST ((struct buf *)0x87654321) 47 --- 31 unchanged lines hidden (view full) --- 79 void *b_saveaddr; /* Original b_addr for physio. */ 80 daddr_t b_lblkno; /* Logical block number. */ 81 daddr_t b_blkno; /* Underlying physical block number. */ 82 /* Function to call upon completion. */ 83 void (*b_iodone) __P((struct buf *)); 84 /* For nested b_iodone's. */ 85 struct iodone_chain *b_iodone_chain; 86 struct vnode *b_vp; /* Device vnode. */ |
| 87 int b_pfcent; /* Center page when swapping cluster. */ | |
| 88 int b_dirtyoff; /* Offset in buffer of dirty region. */ 89 int b_dirtyend; /* Offset of end of dirty region. */ 90 struct ucred *b_rcred; /* Read credentials reference. */ 91 struct ucred *b_wcred; /* Write credentials reference. */ 92 int b_validoff; /* Offset in buffer of valid region. */ 93 int b_validend; /* Offset of end of valid region. */ 94 daddr_t b_pblkno; /* physical block number */ 95 caddr_t b_savekva; /* saved kva for transfer while bouncing */ 96 void *b_driver1; /* for private use by the driver */ 97 void *b_driver2; /* for private use by the driver */ 98 void *b_spc; | 87 int b_dirtyoff; /* Offset in buffer of dirty region. */ 88 int b_dirtyend; /* Offset of end of dirty region. */ 89 struct ucred *b_rcred; /* Read credentials reference. */ 90 struct ucred *b_wcred; /* Write credentials reference. */ 91 int b_validoff; /* Offset in buffer of valid region. */ 92 int b_validend; /* Offset of end of valid region. */ 93 daddr_t b_pblkno; /* physical block number */ 94 caddr_t b_savekva; /* saved kva for transfer while bouncing */ 95 void *b_driver1; /* for private use by the driver */ 96 void *b_driver2; /* for private use by the driver */ 97 void *b_spc; |
| 98 union cluster_info { 99 TAILQ_HEAD(cluster_list_head, buf) cluster_head; 100 TAILQ_ENTRY(buf) cluster_entry; 101 } b_cluster; |
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| 99 struct vm_page *b_pages[(MAXPHYS + PAGE_SIZE - 1)/PAGE_SIZE]; 100 int b_npages; 101}; 102 103/* Device driver compatibility definitions. */ 104#define b_active b_bcount /* Driver queue head: drive active. */ 105#define b_data b_un.b_addr /* b_un.b_addr is not changeable. */ 106#define b_errcnt b_resid /* Retry count while I/O in progress. */ --- 31 unchanged lines hidden (view full) --- 138#define B_WRITEINPROG 0x01000000 /* Write in progress. */ 139#define B_XXX 0x02000000 /* Debugging flag. */ 140#define B_PAGING 0x04000000 /* volatile paging I/O -- bypass VMIO */ 141#define B_VMIO 0x20000000 /* VMIO flag */ 142#define B_CLUSTER 0x40000000 /* pagein op, so swap() can count it */ 143#define B_BOUNCE 0x80000000 /* bounce buffer flag */ 144 145/* | 102 struct vm_page *b_pages[(MAXPHYS + PAGE_SIZE - 1)/PAGE_SIZE]; 103 int b_npages; 104}; 105 106/* Device driver compatibility definitions. */ 107#define b_active b_bcount /* Driver queue head: drive active. */ 108#define b_data b_un.b_addr /* b_un.b_addr is not changeable. */ 109#define b_errcnt b_resid /* Retry count while I/O in progress. */ --- 31 unchanged lines hidden (view full) --- 141#define B_WRITEINPROG 0x01000000 /* Write in progress. */ 142#define B_XXX 0x02000000 /* Debugging flag. */ 143#define B_PAGING 0x04000000 /* volatile paging I/O -- bypass VMIO */ 144#define B_VMIO 0x20000000 /* VMIO flag */ 145#define B_CLUSTER 0x40000000 /* pagein op, so swap() can count it */ 146#define B_BOUNCE 0x80000000 /* bounce buffer flag */ 147 148/* |
| 146 * This structure describes a clustered I/O. It is stored in the b_saveaddr 147 * field of the buffer on which I/O is done. At I/O completion, cluster 148 * callback uses the structure to parcel I/O's to individual buffers, and 149 * then free's this structure. 150 */ 151struct cluster_save { 152 long bs_bcount; /* Saved b_bcount. */ 153 long bs_bufsize; /* Saved b_bufsize. */ 154 void *bs_saveaddr; /* Saved b_addr. */ 155 int bs_nchildren; /* Number of associated buffers. */ 156 struct buf **bs_children; /* List of associated buffers. */ 157}; 158 159/* | |
| 160 * number of buffer hash entries 161 */ 162#define BUFHSZ 512 163 164/* 165 * buffer hash table calculation, originally by David Greenman 166 */ 167#define BUFHASH(vnp, bn) \ --- 54 unchanged lines hidden (view full) --- 222struct buf *geteblk __P((int)); 223int allocbuf __P((struct buf *, int)); 224int biowait __P((struct buf *)); 225void biodone __P((struct buf *)); 226 227void cluster_callback __P((struct buf *)); 228int cluster_read __P((struct vnode *, u_quad_t, daddr_t, long, 229 struct ucred *, struct buf **)); | 149 * number of buffer hash entries 150 */ 151#define BUFHSZ 512 152 153/* 154 * buffer hash table calculation, originally by David Greenman 155 */ 156#define BUFHASH(vnp, bn) \ --- 54 unchanged lines hidden (view full) --- 211struct buf *geteblk __P((int)); 212int allocbuf __P((struct buf *, int)); 213int biowait __P((struct buf *)); 214void biodone __P((struct buf *)); 215 216void cluster_callback __P((struct buf *)); 217int cluster_read __P((struct vnode *, u_quad_t, daddr_t, long, 218 struct ucred *, struct buf **)); |
| 230void cluster_wbuild __P((struct vnode *, struct buf *, long, daddr_t, int, 231 daddr_t)); | 219void cluster_wbuild __P((struct vnode *, long, daddr_t, int)); |
| 232void cluster_write __P((struct buf *, u_quad_t)); 233int physio __P((void (*)(), struct buf *, dev_t, int, u_int (*)(), 234 struct uio *)); 235u_int minphys __P((struct buf *)); 236void vfs_bio_clrbuf __P((struct buf *)); 237void vfs_busy_pages __P((struct buf *, int clear_modify)); 238void vfs_unbusy_pages(struct buf *); 239void vwakeup __P((struct buf *)); --- 16 unchanged lines hidden --- | 220void cluster_write __P((struct buf *, u_quad_t)); 221int physio __P((void (*)(), struct buf *, dev_t, int, u_int (*)(), 222 struct uio *)); 223u_int minphys __P((struct buf *)); 224void vfs_bio_clrbuf __P((struct buf *)); 225void vfs_busy_pages __P((struct buf *, int clear_modify)); 226void vfs_unbusy_pages(struct buf *); 227void vwakeup __P((struct buf *)); --- 16 unchanged lines hidden --- |