File: [Development] / xfs-linux / linux-2.4 / Attic / xfs_buf.h (download)
Revision 1.85, Tue Dec 30 01:31:52 2003 UTC (13 years, 10 months ago) by cattelan
Branch: MAIN
Changes since 1.84: +679 -0
lines
Final bit of code moving to unify the tree
rename page_buf.c/h to xfs_buf.c/h and merge in upper level xfs_buf.h
linux-2.4/page_buf.h 1.83 Renamed to linux-2.4/xfs_buf.h
rename
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/*
* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
/*
* Written by Steve Lord, Jim Mostek, Russell Cattelan at SGI
*/
#ifndef __XFS_BUF_H__
#define __XFS_BUF_H__
#include <linux/version.h>
#include <linux/config.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <asm/system.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/uio.h>
/*
* Base types
*/
/* daddr must be signed since -1 is used for bmaps that are not yet allocated */
typedef loff_t page_buf_daddr_t;
#define PAGE_BUF_DADDR_NULL ((page_buf_daddr_t) (-1LL))
#define page_buf_ctob(pp) ((pp) * PAGE_CACHE_SIZE)
#define page_buf_btoc(dd) (((dd) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT)
#define page_buf_btoct(dd) ((dd) >> PAGE_CACHE_SHIFT)
#define page_buf_poff(aa) ((aa) & ~PAGE_CACHE_MASK)
typedef enum page_buf_rw_e {
PBRW_READ = 1, /* transfer into target memory */
PBRW_WRITE = 2, /* transfer from target memory */
PBRW_ZERO = 3 /* Zero target memory */
} page_buf_rw_t;
typedef enum page_buf_flags_e { /* pb_flags values */
PBF_READ = (1 << 0), /* buffer intended for reading from device */
PBF_WRITE = (1 << 1), /* buffer intended for writing to device */
PBF_MAPPED = (1 << 2), /* buffer mapped (pb_addr valid) */
PBF_PARTIAL = (1 << 3), /* buffer partially read */
PBF_ASYNC = (1 << 4), /* initiator will not wait for completion */
PBF_NONE = (1 << 5), /* buffer not read at all */
PBF_DELWRI = (1 << 6), /* buffer has dirty pages */
PBF_FREED = (1 << 7), /* buffer has been freed and is invalid */
PBF_SYNC = (1 << 8), /* force updates to disk */
PBF_MAPPABLE = (1 << 9),/* use directly-addressable pages */
PBF_STALE = (1 << 10), /* buffer has been staled, do not find it */
PBF_FS_MANAGED = (1 << 11), /* filesystem controls freeing memory */
PBF_FS_DATAIOD = (1 << 12), /* schedule IO completion on fs datad */
/* flags used only as arguments to access routines */
PBF_LOCK = (1 << 13), /* lock requested */
PBF_TRYLOCK = (1 << 14), /* lock requested, but do not wait */
PBF_DONT_BLOCK = (1 << 15), /* do not block in current thread */
/* flags used only internally */
_PBF_LOCKABLE = (1 << 16), /* page_buf_t may be locked */
_PBF_PRIVATE_BH = (1 << 17), /* do not use public buffer heads */
_PBF_ALL_PAGES_MAPPED = (1 << 18), /* all pages in range mapped */
_PBF_ADDR_ALLOCATED = (1 << 19), /* pb_addr space was allocated */
_PBF_MEM_ALLOCATED = (1 << 20), /* underlying pages are allocated */
_PBF_MEM_SLAB = (1 << 21), /* underlying pages are slab allocated */
PBF_FORCEIO = (1 << 22), /* ignore any cache state */
PBF_FLUSH = (1 << 23), /* flush disk write cache */
PBF_READ_AHEAD = (1 << 24), /* asynchronous read-ahead */
PBF_RUN_QUEUES = (1 << 25), /* run block device task queue */
PBF_DIRECTIO = (1 << 26), /* used for a direct IO mapping */
} page_buf_flags_t;
#define PBF_UPDATE (PBF_READ | PBF_WRITE)
#define PBF_NOT_DONE(pb) (((pb)->pb_flags & (PBF_PARTIAL|PBF_NONE)) != 0)
#define PBF_DONE(pb) (((pb)->pb_flags & (PBF_PARTIAL|PBF_NONE)) == 0)
#define PBR_SECTOR_ONLY 1 /* only use sector size buffer heads */
#define PBR_ALIGNED_ONLY 2 /* only use aligned I/O */
typedef struct pb_target {
int pbr_flags;
dev_t pbr_dev;
kdev_t pbr_kdev;
struct block_device *pbr_bdev;
struct address_space *pbr_mapping;
unsigned int pbr_bsize;
unsigned int pbr_sshift;
size_t pbr_smask;
} pb_target_t;
/*
* page_buf_t: Buffer structure for page cache-based buffers
*
* This buffer structure is used by the page cache buffer management routines
* to refer to an assembly of pages forming a logical buffer. The actual
* I/O is performed with buffer_head or bio structures, as required by drivers,
* for drivers which do not understand this structure. The buffer structure is
* used on temporary basis only, and discarded when released.
*
* The real data storage is recorded in the page cache. Metadata is
* hashed to the inode for the block device on which the file system resides.
* File data is hashed to the inode for the file. Pages which are only
* partially filled with data have bits set in their block_map entry
* to indicate which disk blocks in the page are not valid.
*/
struct page_buf_s;
typedef void (*page_buf_iodone_t)(struct page_buf_s *);
/* call-back function on I/O completion */
typedef void (*page_buf_relse_t)(struct page_buf_s *);
/* call-back function on I/O completion */
typedef int (*page_buf_bdstrat_t)(struct page_buf_s *);
#define PB_PAGES 4
typedef struct page_buf_s {
struct semaphore pb_sema; /* semaphore for lockables */
unsigned long pb_flushtime; /* time to flush pagebuf */
atomic_t pb_pin_count; /* pin count */
wait_queue_head_t pb_waiters; /* unpin waiters */
struct list_head pb_list;
page_buf_flags_t pb_flags; /* status flags */
struct list_head pb_hash_list;
struct pb_target *pb_target; /* logical object */
atomic_t pb_hold; /* reference count */
page_buf_daddr_t pb_bn; /* block number for I/O */
loff_t pb_file_offset; /* offset in file */
size_t pb_buffer_length; /* size of buffer in bytes */
size_t pb_count_desired; /* desired transfer size */
void *pb_addr; /* virtual address of buffer */
struct tq_struct pb_iodone_sched;
atomic_t pb_io_remaining;/* #outstanding I/O requests */
page_buf_iodone_t pb_iodone; /* I/O completion function */
page_buf_relse_t pb_relse; /* releasing function */
page_buf_bdstrat_t pb_strat; /* pre-write function */
struct semaphore pb_iodonesema; /* Semaphore for I/O waiters */
void *pb_fspriv;
void *pb_fspriv2;
void *pb_fspriv3;
unsigned short pb_error; /* error code on I/O */
unsigned short pb_page_count; /* size of page array */
unsigned short pb_offset; /* page offset in first page */
unsigned char pb_locked; /* page array is locked */
unsigned char pb_hash_index; /* hash table index */
struct page **pb_pages; /* array of page pointers */
struct page *pb_page_array[PB_PAGES]; /* inline pages */
#ifdef PAGEBUF_LOCK_TRACKING
int pb_last_holder;
#endif
} page_buf_t;
/* Finding and Reading Buffers */
extern page_buf_t *pagebuf_find( /* find buffer for block if */
/* the block is in memory */
struct pb_target *, /* inode for block */
loff_t, /* starting offset of range */
size_t, /* length of range */
page_buf_flags_t); /* PBF_LOCK */
extern page_buf_t *pagebuf_get( /* allocate a buffer */
struct pb_target *, /* inode for buffer */
loff_t, /* starting offset of range */
size_t, /* length of range */
page_buf_flags_t); /* PBF_LOCK, PBF_READ, */
/* PBF_ASYNC */
extern page_buf_t *pagebuf_lookup(
struct pb_target *,
loff_t, /* starting offset of range */
size_t, /* length of range */
page_buf_flags_t); /* PBF_READ, PBF_WRITE, */
/* PBF_FORCEIO, _PBF_LOCKABLE */
extern page_buf_t *pagebuf_get_empty( /* allocate pagebuf struct with */
/* no memory or disk address */
size_t len,
struct pb_target *); /* mount point "fake" inode */
extern page_buf_t *pagebuf_get_no_daddr(/* allocate pagebuf struct */
/* without disk address */
size_t len,
struct pb_target *); /* mount point "fake" inode */
extern int pagebuf_associate_memory(
page_buf_t *,
void *,
size_t);
extern void pagebuf_hold( /* increment reference count */
page_buf_t *); /* buffer to hold */
extern void pagebuf_readahead( /* read ahead into cache */
struct pb_target *, /* target for buffer (or NULL) */
loff_t, /* starting offset of range */
size_t, /* length of range */
page_buf_flags_t); /* additional read flags */
/* Releasing Buffers */
extern void pagebuf_free( /* deallocate a buffer */
page_buf_t *); /* buffer to deallocate */
extern void pagebuf_rele( /* release hold on a buffer */
page_buf_t *); /* buffer to release */
/* Locking and Unlocking Buffers */
extern int pagebuf_cond_lock( /* lock buffer, if not locked */
/* (returns -EBUSY if locked) */
page_buf_t *); /* buffer to lock */
extern int pagebuf_lock_value( /* return count on lock */
page_buf_t *); /* buffer to check */
extern int pagebuf_lock( /* lock buffer */
page_buf_t *); /* buffer to lock */
extern void pagebuf_unlock( /* unlock buffer */
page_buf_t *); /* buffer to unlock */
/* Buffer Read and Write Routines */
extern void pagebuf_iodone( /* mark buffer I/O complete */
page_buf_t *, /* buffer to mark */
int, /* use data/log helper thread. */
int); /* run completion locally, or in
* a helper thread. */
extern void pagebuf_ioerror( /* mark buffer in error (or not) */
page_buf_t *, /* buffer to mark */
unsigned int); /* error to store (0 if none) */
extern int pagebuf_iostart( /* start I/O on a buffer */
page_buf_t *, /* buffer to start */
page_buf_flags_t); /* PBF_LOCK, PBF_ASYNC, */
/* PBF_READ, PBF_WRITE, */
/* PBF_DELWRI, PBF_SYNC */
extern int pagebuf_iorequest( /* start real I/O */
page_buf_t *); /* buffer to convey to device */
extern int pagebuf_iowait( /* wait for buffer I/O done */
page_buf_t *); /* buffer to wait on */
extern void pagebuf_iomove( /* move data in/out of pagebuf */
page_buf_t *, /* buffer to manipulate */
size_t, /* starting buffer offset */
size_t, /* length in buffer */
caddr_t, /* data pointer */
page_buf_rw_t); /* direction */
static inline int pagebuf_iostrategy(page_buf_t *pb)
{
return pb->pb_strat ? pb->pb_strat(pb) : pagebuf_iorequest(pb);
}
static inline int pagebuf_geterror(page_buf_t *pb)
{
return pb ? pb->pb_error : ENOMEM;
}
/* Buffer Utility Routines */
extern caddr_t pagebuf_offset( /* pointer at offset in buffer */
page_buf_t *, /* buffer to offset into */
size_t); /* offset */
/* Pinning Buffer Storage in Memory */
extern void pagebuf_pin( /* pin buffer in memory */
page_buf_t *); /* buffer to pin */
extern void pagebuf_unpin( /* unpin buffered data */
page_buf_t *); /* buffer to unpin */
extern int pagebuf_ispin( /* check if buffer is pinned */
page_buf_t *); /* buffer to check */
/* Delayed Write Buffer Routines */
#define PBDF_WAIT 0x01
extern void pagebuf_delwri_flush(
pb_target_t *,
unsigned long,
int *);
extern void pagebuf_delwri_dequeue(
page_buf_t *);
/* Buffer Daemon Setup Routines */
extern int pagebuf_init(void);
extern void pagebuf_terminate(void);
#ifdef PAGEBUF_TRACE
extern ktrace_t *pagebuf_trace_buf;
extern void pagebuf_trace(
page_buf_t *, /* buffer being traced */
char *, /* description of operation */
void *, /* arbitrary diagnostic value */
void *); /* return address */
#else
# define pagebuf_trace(pb, id, ptr, ra) do { } while (0)
#endif
#define pagebuf_target_name(target) bdevname((target)->pbr_kdev)
/*
* Kernel version compatibility macros
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,9)
#define page_buffers(page) ((page)->buffers)
#define page_has_buffers(page) ((page)->buffers)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,12)
#define PageUptodate(x) Page_Uptodate(x)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,17)
/*
* macro tricks to expand the set_buffer_foo() and clear_buffer_foo()
* functions.
*/
#define BUFFER_FNS(bit, name) \
static inline void set_buffer_##name(struct buffer_head *bh) \
{ \
set_bit(BH_##bit, &(bh)->b_state); \
} \
static inline void clear_buffer_##name(struct buffer_head *bh) \
{ \
clear_bit(BH_##bit, &(bh)->b_state); \
} \
/*
* Emit the buffer bitops functions. Note that there are also functions
* of the form "mark_buffer_foo()". These are higher-level functions which
* do something in addition to setting a b_state bit.
*/
BUFFER_FNS(Uptodate, uptodate)
BUFFER_FNS(Dirty, dirty)
BUFFER_FNS(Lock, locked)
BUFFER_FNS(Req, req)
BUFFER_FNS(Mapped, mapped)
BUFFER_FNS(New, new)
BUFFER_FNS(Async, async)
BUFFER_FNS(Wait_IO, wait_io)
BUFFER_FNS(Launder, launder)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,22)
BUFFER_FNS(Sync, sync)
#endif /* kernel >= 2.4.22 */
BUFFER_FNS(Delay, delay)
#endif /* kernel < 2.5.17 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,48)
#define get_seconds() CURRENT_TIME
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,67)
#define blk_run_queues() run_task_queue(&tq_disk)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
#define i_size_read(inode) ((inode)->i_size)
#define i_size_write(inode, sz) ((inode)->i_size = (sz))
#endif
/* These are just for xfs_syncsub... it sets an internal variable
* then passes it to VOP_FLUSH_PAGES or adds the flags to a newly gotten buf_t
*/
#define XFS_B_ASYNC PBF_ASYNC
#define XFS_B_DELWRI PBF_DELWRI
#define XFS_B_READ PBF_READ
#define XFS_B_WRITE PBF_WRITE
#define XFS_B_STALE PBF_STALE
#define XFS_BUF_TRYLOCK PBF_TRYLOCK
#define XFS_INCORE_TRYLOCK PBF_TRYLOCK
#define XFS_BUF_LOCK PBF_LOCK
#define XFS_BUF_MAPPED PBF_MAPPED
#define BUF_BUSY PBF_DONT_BLOCK
#define XFS_BUF_BFLAGS(x) ((x)->pb_flags)
#define XFS_BUF_ZEROFLAGS(x) \
((x)->pb_flags &= ~(PBF_READ|PBF_WRITE|PBF_ASYNC|PBF_SYNC|PBF_DELWRI))
#define XFS_BUF_STALE(x) ((x)->pb_flags |= XFS_B_STALE)
#define XFS_BUF_UNSTALE(x) ((x)->pb_flags &= ~XFS_B_STALE)
#define XFS_BUF_ISSTALE(x) ((x)->pb_flags & XFS_B_STALE)
#define XFS_BUF_SUPER_STALE(x) do { \
XFS_BUF_STALE(x); \
xfs_buf_undelay(x); \
XFS_BUF_DONE(x); \
} while (0)
#define XFS_BUF_MANAGE PBF_FS_MANAGED
#define XFS_BUF_UNMANAGE(x) ((x)->pb_flags &= ~PBF_FS_MANAGED)
static inline void xfs_buf_undelay(page_buf_t *pb)
{
if (pb->pb_flags & PBF_DELWRI) {
if (pb->pb_list.next != &pb->pb_list) {
pagebuf_delwri_dequeue(pb);
pagebuf_rele(pb);
} else {
pb->pb_flags &= ~PBF_DELWRI;
}
}
}
#define XFS_BUF_DELAYWRITE(x) ((x)->pb_flags |= PBF_DELWRI)
#define XFS_BUF_UNDELAYWRITE(x) xfs_buf_undelay(x)
#define XFS_BUF_ISDELAYWRITE(x) ((x)->pb_flags & PBF_DELWRI)
#define XFS_BUF_ERROR(x,no) pagebuf_ioerror(x,no)
#define XFS_BUF_GETERROR(x) pagebuf_geterror(x)
#define XFS_BUF_ISERROR(x) (pagebuf_geterror(x)?1:0)
#define XFS_BUF_DONE(x) ((x)->pb_flags &= ~(PBF_PARTIAL|PBF_NONE))
#define XFS_BUF_UNDONE(x) ((x)->pb_flags |= PBF_PARTIAL|PBF_NONE)
#define XFS_BUF_ISDONE(x) (!(PBF_NOT_DONE(x)))
#define XFS_BUF_BUSY(x) ((x)->pb_flags |= PBF_FORCEIO)
#define XFS_BUF_UNBUSY(x) ((x)->pb_flags &= ~PBF_FORCEIO)
#define XFS_BUF_ISBUSY(x) (1)
#define XFS_BUF_ASYNC(x) ((x)->pb_flags |= PBF_ASYNC)
#define XFS_BUF_UNASYNC(x) ((x)->pb_flags &= ~PBF_ASYNC)
#define XFS_BUF_ISASYNC(x) ((x)->pb_flags & PBF_ASYNC)
#define XFS_BUF_FLUSH(x) ((x)->pb_flags |= PBF_FLUSH)
#define XFS_BUF_UNFLUSH(x) ((x)->pb_flags &= ~PBF_FLUSH)
#define XFS_BUF_ISFLUSH(x) ((x)->pb_flags & PBF_FLUSH)
#define XFS_BUF_SHUT(x) printk("XFS_BUF_SHUT not implemented yet\n")
#define XFS_BUF_UNSHUT(x) printk("XFS_BUF_UNSHUT not implemented yet\n")
#define XFS_BUF_ISSHUT(x) (0)
#define XFS_BUF_HOLD(x) pagebuf_hold(x)
#define XFS_BUF_READ(x) ((x)->pb_flags |= PBF_READ)
#define XFS_BUF_UNREAD(x) ((x)->pb_flags &= ~PBF_READ)
#define XFS_BUF_ISREAD(x) ((x)->pb_flags & PBF_READ)
#define XFS_BUF_WRITE(x) ((x)->pb_flags |= PBF_WRITE)
#define XFS_BUF_UNWRITE(x) ((x)->pb_flags &= ~PBF_WRITE)
#define XFS_BUF_ISWRITE(x) ((x)->pb_flags & PBF_WRITE)
#define XFS_BUF_ISUNINITIAL(x) (0)
#define XFS_BUF_UNUNINITIAL(x) (0)
#define XFS_BUF_BP_ISMAPPED(bp) 1
typedef struct page_buf_s xfs_buf_t;
#define xfs_buf page_buf_s
typedef struct pb_target xfs_buftarg_t;
#define xfs_buftarg pb_target
#define XFS_BUF_DATAIO(x) ((x)->pb_flags |= PBF_FS_DATAIOD)
#define XFS_BUF_UNDATAIO(x) ((x)->pb_flags &= ~PBF_FS_DATAIOD)
#define XFS_BUF_IODONE_FUNC(buf) (buf)->pb_iodone
#define XFS_BUF_SET_IODONE_FUNC(buf, func) \
(buf)->pb_iodone = (func)
#define XFS_BUF_CLR_IODONE_FUNC(buf) \
(buf)->pb_iodone = NULL
#define XFS_BUF_SET_BDSTRAT_FUNC(buf, func) \
(buf)->pb_strat = (func)
#define XFS_BUF_CLR_BDSTRAT_FUNC(buf) \
(buf)->pb_strat = NULL
#define XFS_BUF_FSPRIVATE(buf, type) \
((type)(buf)->pb_fspriv)
#define XFS_BUF_SET_FSPRIVATE(buf, value) \
(buf)->pb_fspriv = (void *)(value)
#define XFS_BUF_FSPRIVATE2(buf, type) \
((type)(buf)->pb_fspriv2)
#define XFS_BUF_SET_FSPRIVATE2(buf, value) \
(buf)->pb_fspriv2 = (void *)(value)
#define XFS_BUF_FSPRIVATE3(buf, type) \
((type)(buf)->pb_fspriv3)
#define XFS_BUF_SET_FSPRIVATE3(buf, value) \
(buf)->pb_fspriv3 = (void *)(value)
#define XFS_BUF_SET_START(buf)
#define XFS_BUF_SET_BRELSE_FUNC(buf, value) \
(buf)->pb_relse = (value)
#define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->pb_addr)
extern inline xfs_caddr_t xfs_buf_offset(page_buf_t *bp, size_t offset)
{
if (bp->pb_flags & PBF_MAPPED)
return XFS_BUF_PTR(bp) + offset;
return (xfs_caddr_t) pagebuf_offset(bp, offset);
}
#define XFS_BUF_SET_PTR(bp, val, count) \
pagebuf_associate_memory(bp, val, count)
#define XFS_BUF_ADDR(bp) ((bp)->pb_bn)
#define XFS_BUF_SET_ADDR(bp, blk) \
((bp)->pb_bn = (page_buf_daddr_t)(blk))
#define XFS_BUF_OFFSET(bp) ((bp)->pb_file_offset)
#define XFS_BUF_SET_OFFSET(bp, off) \
((bp)->pb_file_offset = (off))
#define XFS_BUF_COUNT(bp) ((bp)->pb_count_desired)
#define XFS_BUF_SET_COUNT(bp, cnt) \
((bp)->pb_count_desired = (cnt))
#define XFS_BUF_SIZE(bp) ((bp)->pb_buffer_length)
#define XFS_BUF_SET_SIZE(bp, cnt) \
((bp)->pb_buffer_length = (cnt))
#define XFS_BUF_SET_VTYPE_REF(bp, type, ref)
#define XFS_BUF_SET_VTYPE(bp, type)
#define XFS_BUF_SET_REF(bp, ref)
#define XFS_BUF_ISPINNED(bp) pagebuf_ispin(bp)
#define XFS_BUF_VALUSEMA(bp) pagebuf_lock_value(bp)
#define XFS_BUF_CPSEMA(bp) (pagebuf_cond_lock(bp) == 0)
#define XFS_BUF_VSEMA(bp) pagebuf_unlock(bp)
#define XFS_BUF_PSEMA(bp,x) pagebuf_lock(bp)
#define XFS_BUF_V_IODONESEMA(bp) up(&bp->pb_iodonesema);
/* setup the buffer target from a buftarg structure */
#define XFS_BUF_SET_TARGET(bp, target) \
(bp)->pb_target = (target)
#define XFS_BUF_TARGET(bp) ((bp)->pb_target)
#define XFS_BUFTARG_NAME(target) \
pagebuf_target_name(target)
#define XFS_BUF_SET_VTYPE_REF(bp, type, ref)
#define XFS_BUF_SET_VTYPE(bp, type)
#define XFS_BUF_SET_REF(bp, ref)
#define xfs_buf_read(target, blkno, len, flags) \
pagebuf_get((target), (blkno), (len), \
PBF_LOCK | PBF_READ | PBF_MAPPED | PBF_MAPPABLE)
#define xfs_buf_get(target, blkno, len, flags) \
pagebuf_get((target), (blkno), (len), \
PBF_LOCK | PBF_MAPPED | PBF_MAPPABLE)
#define xfs_buf_read_flags(target, blkno, len, flags) \
pagebuf_get((target), (blkno), (len), \
PBF_READ | PBF_MAPPABLE | flags)
#define xfs_buf_get_flags(target, blkno, len, flags) \
pagebuf_get((target), (blkno), (len), \
PBF_MAPPABLE | flags)
static inline int xfs_bawrite(void *mp, page_buf_t *bp)
{
bp->pb_fspriv3 = mp;
bp->pb_strat = xfs_bdstrat_cb;
xfs_buf_undelay(bp);
return pagebuf_iostart(bp, PBF_WRITE | PBF_ASYNC | PBF_RUN_QUEUES);
}
static inline void xfs_buf_relse(page_buf_t *bp)
{
if ((bp->pb_flags & _PBF_LOCKABLE) && !bp->pb_relse)
pagebuf_unlock(bp);
pagebuf_rele(bp);
}
#define xfs_bpin(bp) pagebuf_pin(bp)
#define xfs_bunpin(bp) pagebuf_unpin(bp)
#define xfs_buftrace(id, bp) \
pagebuf_trace(bp, id, NULL, (void *)__builtin_return_address(0))
#define xfs_biodone(pb) \
pagebuf_iodone(pb, (pb->pb_flags & PBF_FS_DATAIOD), 0)
#define xfs_incore(buftarg,blkno,len,lockit) \
pagebuf_find(buftarg, blkno ,len, lockit)
#define xfs_biomove(pb, off, len, data, rw) \
pagebuf_iomove((pb), (off), (len), (data), \
((rw) == XFS_B_WRITE) ? PBRW_WRITE : PBRW_READ)
#define xfs_biozero(pb, off, len) \
pagebuf_iomove((pb), (off), (len), NULL, PBRW_ZERO)
static inline int XFS_bwrite(page_buf_t *pb)
{
int iowait = (pb->pb_flags & PBF_ASYNC) == 0;
int error = 0;
pb->pb_flags |= PBF_SYNC;
if (!iowait)
pb->pb_flags |= PBF_RUN_QUEUES;
xfs_buf_undelay(pb);
pagebuf_iostrategy(pb);
if (iowait) {
error = pagebuf_iowait(pb);
xfs_buf_relse(pb);
}
return error;
}
#define XFS_bdwrite(pb) \
pagebuf_iostart(pb, PBF_DELWRI | PBF_ASYNC)
static inline int xfs_bdwrite(void *mp, page_buf_t *bp)
{
bp->pb_strat = xfs_bdstrat_cb;
bp->pb_fspriv3 = mp;
return pagebuf_iostart(bp, PBF_DELWRI | PBF_ASYNC);
}
#define XFS_bdstrat(bp) pagebuf_iorequest(bp)
#define xfs_iowait(pb) pagebuf_iowait(pb)
/*
* Go through all incore buffers, and release buffers
* if they belong to the given device. This is used in
* filesystem error handling to preserve the consistency
* of its metadata.
*/
#define xfs_binval(buftarg) xfs_flush_buftarg(buftarg)
#define XFS_bflush(buftarg) xfs_flush_buftarg(buftarg)
#define xfs_incore_relse(buftarg,delwri_only,wait) \
xfs_relse_buftarg(buftarg)
#define xfs_baread(target, rablkno, ralen) \
pagebuf_readahead((target), (rablkno), (ralen), PBF_DONT_BLOCK)
#define xfs_buf_get_empty(len, target) pagebuf_get_empty((len), (target))
#define xfs_buf_get_noaddr(len, target) pagebuf_get_no_daddr((len), (target))
#define xfs_buf_free(bp) pagebuf_free(bp)
#endif /* __XFS_BUF_H__ */
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