| /* |
| * 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_bufhash { |
| struct list_head bh_list; |
| spinlock_t bh_lock; |
| } xfs_bufhash_t; |
| |
| 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; |
| |
| /* per-device buffer hash table */ |
| uint bt_hashmask; |
| uint bt_hashshift; |
| xfs_bufhash_t *bt_hash; |
| } 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 structures, as required by drivers. |
| * |
| * 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 block device on which the file system resides. |
| */ |
| |
| struct xfs_buf; |
| |
| /* call-back function on I/O completion */ |
| 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 *); |
| /* pre-write function */ |
| typedef int (*page_buf_bdstrat_t)(struct xfs_buf *); |
| |
| #define PB_PAGES 2 |
| |
| 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; /* hash table list */ |
| xfs_bufhash_t *pb_hash; /* hash table list start */ |
| xfs_buftarg_t *pb_target; /* buffer target (device) */ |
| 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_locked; /* page array is locked */ |
| unsigned int pb_page_count; /* size of page array */ |
| unsigned int pb_offset; /* page offset in first page */ |
| 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 */ |
| xfs_buf_t *); /* newly allocated buffer */ |
| |
| #define xfs_incore(buftarg,blkno,len,lockit) \ |
| _pagebuf_find(buftarg, blkno ,len, lockit, NULL) |
| |
| extern xfs_buf_t *xfs_buf_get_flags( /* 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 */ |
| |
| #define xfs_buf_get(target, blkno, len, flags) \ |
| xfs_buf_get_flags((target), (blkno), (len), PBF_LOCK | PBF_MAPPED) |
| |
| extern xfs_buf_t *xfs_buf_read_flags( /* allocate and read 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_ASYNC */ |
| |
| #define xfs_buf_read(target, blkno, len, flags) \ |
| xfs_buf_read_flags((target), (blkno), (len), PBF_LOCK | PBF_MAPPED) |
| |
| 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); \ |
| pagebuf_delwri_dequeue(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) |
| |
| #define XFS_BUF_DELAYWRITE(x) ((x)->pb_flags |= PBF_DELWRI) |
| #define XFS_BUF_UNDELAYWRITE(x) pagebuf_delwri_dequeue(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 = (xfs_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) |
| |
| static inline int xfs_bawrite(void *mp, xfs_buf_t *bp) |
| { |
| bp->pb_fspriv3 = mp; |
| bp->pb_strat = xfs_bdstrat_cb; |
| pagebuf_delwri_dequeue(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_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; |
| |
| pagebuf_delwri_dequeue(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 *, int); |
| extern void xfs_free_buftarg(xfs_buftarg_t *, int); |
| extern void xfs_wait_buftarg(xfs_buftarg_t *); |
| extern int 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__ */ |