--- /dev/null
+/*
+ * Copyright (c) 2000-2004 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/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/buffer_head.h>
+#include <linux/uio.h>
+
+/*
+ * Base types
+ */
+
+#define XFS_BUF_DADDR_NULL ((xfs_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_STALE = (1 << 7), /* buffer has been staled, do not find it */
+ PBF_FS_MANAGED = (1 << 8), /* filesystem controls freeing memory */
+ PBF_FS_DATAIOD = (1 << 9), /* schedule IO completion on fs datad */
+ PBF_FORCEIO = (1 << 10), /* ignore any cache state */
+ PBF_FLUSH = (1 << 11), /* flush disk write cache */
+ PBF_READ_AHEAD = (1 << 12), /* asynchronous read-ahead */
+
+ /* flags used only as arguments to access routines */
+ PBF_LOCK = (1 << 14), /* lock requested */
+ PBF_TRYLOCK = (1 << 15), /* lock requested, but do not wait */
+ PBF_DONT_BLOCK = (1 << 16), /* do not block in current thread */
+
+ /* flags used only internally */
+ _PBF_PAGE_CACHE = (1 << 17),/* backed by pagecache */
+ _PBF_KMEM_ALLOC = (1 << 18),/* backed by kmem_alloc() */
+ _PBF_RUN_QUEUES = (1 << 19),/* run block device task queue */
+} 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)
+
+typedef struct xfs_buftarg {
+ dev_t pbr_dev;
+ struct block_device *pbr_bdev;
+ struct address_space *pbr_mapping;
+ unsigned int pbr_bsize;
+ unsigned int pbr_sshift;
+ size_t pbr_smask;
+} xfs_buftarg_t;
+
+/*
+ * xfs_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 xfs_buf;
+typedef void (*page_buf_iodone_t)(struct xfs_buf *);
+ /* call-back function on I/O completion */
+typedef void (*page_buf_relse_t)(struct xfs_buf *);
+ /* call-back function on I/O completion */
+typedef int (*page_buf_bdstrat_t)(struct xfs_buf *);
+
+#define PB_PAGES 4
+
+typedef struct xfs_buf {
+ struct semaphore pb_sema; /* semaphore for lockables */
+ unsigned long pb_queuetime; /* time buffer was queued */
+ 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;
+ xfs_buftarg_t *pb_target; /* logical object */
+ atomic_t pb_hold; /* reference count */
+ xfs_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 work_struct pb_iodone_work;
+ 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
+} xfs_buf_t;
+
+
+/* Finding and Reading Buffers */
+
+extern xfs_buf_t *pagebuf_find( /* find buffer for block if */
+ /* the block is in memory */
+ xfs_buftarg_t *, /* inode for block */
+ loff_t, /* starting offset of range */
+ size_t, /* length of range */
+ page_buf_flags_t); /* PBF_LOCK */
+
+extern xfs_buf_t *pagebuf_get( /* allocate a buffer */
+ xfs_buftarg_t *, /* 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 xfs_buf_t *pagebuf_lookup(
+ xfs_buftarg_t *,
+ loff_t, /* starting offset of range */
+ size_t, /* length of range */
+ page_buf_flags_t); /* PBF_READ, PBF_WRITE, */
+ /* PBF_FORCEIO, */
+
+extern xfs_buf_t *pagebuf_get_empty( /* allocate pagebuf struct with */
+ /* no memory or disk address */
+ size_t len,
+ xfs_buftarg_t *); /* mount point "fake" inode */
+
+extern xfs_buf_t *pagebuf_get_no_daddr(/* allocate pagebuf struct */
+ /* without disk address */
+ size_t len,
+ xfs_buftarg_t *); /* mount point "fake" inode */
+
+extern int pagebuf_associate_memory(
+ xfs_buf_t *,
+ void *,
+ size_t);
+
+extern void pagebuf_hold( /* increment reference count */
+ xfs_buf_t *); /* buffer to hold */
+
+extern void pagebuf_readahead( /* read ahead into cache */
+ xfs_buftarg_t *, /* 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 */
+ xfs_buf_t *); /* buffer to deallocate */
+
+extern void pagebuf_rele( /* release hold on a buffer */
+ xfs_buf_t *); /* buffer to release */
+
+/* Locking and Unlocking Buffers */
+
+extern int pagebuf_cond_lock( /* lock buffer, if not locked */
+ /* (returns -EBUSY if locked) */
+ xfs_buf_t *); /* buffer to lock */
+
+extern int pagebuf_lock_value( /* return count on lock */
+ xfs_buf_t *); /* buffer to check */
+
+extern int pagebuf_lock( /* lock buffer */
+ xfs_buf_t *); /* buffer to lock */
+
+extern void pagebuf_unlock( /* unlock buffer */
+ xfs_buf_t *); /* buffer to unlock */
+
+/* Buffer Read and Write Routines */
+
+extern void pagebuf_iodone( /* mark buffer I/O complete */
+ xfs_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) */
+ xfs_buf_t *, /* buffer to mark */
+ int); /* error to store (0 if none) */
+
+extern int pagebuf_iostart( /* start I/O on a buffer */
+ xfs_buf_t *, /* buffer to start */
+ page_buf_flags_t); /* PBF_LOCK, PBF_ASYNC, */
+ /* PBF_READ, PBF_WRITE, */
+ /* PBF_DELWRI */
+
+extern int pagebuf_iorequest( /* start real I/O */
+ xfs_buf_t *); /* buffer to convey to device */
+
+extern int pagebuf_iowait( /* wait for buffer I/O done */
+ xfs_buf_t *); /* buffer to wait on */
+
+extern void pagebuf_iomove( /* move data in/out of pagebuf */
+ xfs_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(xfs_buf_t *pb)
+{
+ return pb->pb_strat ? pb->pb_strat(pb) : pagebuf_iorequest(pb);
+}
+
+static inline int pagebuf_geterror(xfs_buf_t *pb)
+{
+ return pb ? pb->pb_error : ENOMEM;
+}
+
+/* Buffer Utility Routines */
+
+extern caddr_t pagebuf_offset( /* pointer at offset in buffer */
+ xfs_buf_t *, /* buffer to offset into */
+ size_t); /* offset */
+
+/* Pinning Buffer Storage in Memory */
+
+extern void pagebuf_pin( /* pin buffer in memory */
+ xfs_buf_t *); /* buffer to pin */
+
+extern void pagebuf_unpin( /* unpin buffered data */
+ xfs_buf_t *); /* buffer to unpin */
+
+extern int pagebuf_ispin( /* check if buffer is pinned */
+ xfs_buf_t *); /* buffer to check */
+
+/* Delayed Write Buffer Routines */
+
+extern void pagebuf_delwri_dequeue(xfs_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(
+ xfs_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) \
+ ({ char __b[BDEVNAME_SIZE]; bdevname((target)->pbr_bdev, __b); __b; })
+
+
+
+
+
+/* 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_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(xfs_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
+
+#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(xfs_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 = (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)
+#define xfs_buf_get(target, blkno, len, flags) \
+ pagebuf_get((target), (blkno), (len), \
+ PBF_LOCK | PBF_MAPPED)
+
+#define xfs_buf_read_flags(target, blkno, len, flags) \
+ pagebuf_get((target), (blkno), (len), PBF_READ | (flags))
+#define xfs_buf_get_flags(target, blkno, len, flags) \
+ pagebuf_get((target), (blkno), (len), (flags))
+
+static inline int xfs_bawrite(void *mp, xfs_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(xfs_buf_t *bp)
+{
+ if (!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(xfs_buf_t *pb)
+{
+ int iowait = (pb->pb_flags & PBF_ASYNC) == 0;
+ int error = 0;
+
+ 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, xfs_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)
+
+#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)
+
+
+/*
+ * Handling of buftargs.
+ */
+
+extern xfs_buftarg_t *xfs_alloc_buftarg(struct block_device *);
+extern void xfs_free_buftarg(xfs_buftarg_t *, int);
+extern void xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int);
+extern void xfs_incore_relse(xfs_buftarg_t *, int, int);
+extern int xfs_flush_buftarg(xfs_buftarg_t *, int);
+
+#define xfs_getsize_buftarg(buftarg) \
+ block_size((buftarg)->pbr_bdev)
+#define xfs_readonly_buftarg(buftarg) \
+ bdev_read_only((buftarg)->pbr_bdev)
+#define xfs_binval(buftarg) \
+ xfs_flush_buftarg(buftarg, 1)
+#define XFS_bflush(buftarg) \
+ xfs_flush_buftarg(buftarg, 1)
+
+#endif /* __XFS_BUF_H__ */
git://git.onelab.eu / linux-2.6.git / blobdiff