diff options
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_buf.h')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_buf.h | 696 |
1 files changed, 286 insertions, 410 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index 237a35b915d1e..4dd6592d5a4cb 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -32,44 +32,47 @@ * 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_ASYNC = (1 << 4), /* initiator will not wait for completion */ - PBF_DONE = (1 << 5), /* all pages in the buffer uptodate */ - 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_ORDERED = (1 << 11), /* use ordered writes */ - PBF_READ_AHEAD = (1 << 12), /* asynchronous read-ahead */ +#define XFS_BUF_DADDR_NULL ((xfs_daddr_t) (-1LL)) + +#define xfs_buf_ctob(pp) ((pp) * PAGE_CACHE_SIZE) +#define xfs_buf_btoc(dd) (((dd) + PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) +#define xfs_buf_btoct(dd) ((dd) >> PAGE_CACHE_SHIFT) +#define xfs_buf_poff(aa) ((aa) & ~PAGE_CACHE_MASK) + +typedef enum { + XBRW_READ = 1, /* transfer into target memory */ + XBRW_WRITE = 2, /* transfer from target memory */ + XBRW_ZERO = 3, /* Zero target memory */ +} xfs_buf_rw_t; + +typedef enum { + XBF_READ = (1 << 0), /* buffer intended for reading from device */ + XBF_WRITE = (1 << 1), /* buffer intended for writing to device */ + XBF_MAPPED = (1 << 2), /* buffer mapped (b_addr valid) */ + XBF_ASYNC = (1 << 4), /* initiator will not wait for completion */ + XBF_DONE = (1 << 5), /* all pages in the buffer uptodate */ + XBF_DELWRI = (1 << 6), /* buffer has dirty pages */ + XBF_STALE = (1 << 7), /* buffer has been staled, do not find it */ + XBF_FS_MANAGED = (1 << 8), /* filesystem controls freeing memory */ + XBF_ORDERED = (1 << 11), /* use ordered writes */ + XBF_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 */ + XBF_LOCK = (1 << 14), /* lock requested */ + XBF_TRYLOCK = (1 << 15), /* lock requested, but do not wait */ + XBF_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 */ - _PBF_DELWRI_Q = (1 << 21), /* buffer on delwri queue */ -} page_buf_flags_t; + _XBF_PAGE_CACHE = (1 << 17),/* backed by pagecache */ + _XBF_KMEM_ALLOC = (1 << 18),/* backed by kmem_alloc() */ + _XBF_RUN_QUEUES = (1 << 19),/* run block device task queue */ + _XBF_DELWRI_Q = (1 << 21), /* buffer on delwri queue */ +} xfs_buf_flags_t; +typedef enum { + XBT_FORCE_SLEEP = (0 << 1), + XBT_FORCE_FLUSH = (1 << 1), +} xfs_buftarg_flags_t; typedef struct xfs_bufhash { struct list_head bh_list; @@ -77,477 +80,350 @@ typedef struct xfs_bufhash { } 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 */ + dev_t bt_dev; + struct block_device *bt_bdev; + struct address_space *bt_mapping; + unsigned int bt_bsize; + unsigned int bt_sshift; + size_t bt_smask; + + /* per device buffer hash table */ uint bt_hashmask; uint bt_hashshift; xfs_bufhash_t *bt_hash; + + /* per device delwri queue */ + struct task_struct *bt_task; + struct list_head bt_list; + struct list_head bt_delwrite_queue; + spinlock_t bt_delwrite_lock; + unsigned long bt_flags; } xfs_buftarg_t; /* - * xfs_buf_t: Buffer structure for page cache-based buffers + * xfs_buf_t: Buffer structure for pagecache-based buffers + * + * This buffer structure is used by the pagecache buffer management routines + * to refer to an assembly of pages forming a logical buffer. * - * 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 + * The buffer structure is used on a temporary basis only, and discarded when + * released. The real data storage is recorded in the pagecache. Buffers are * hashed to the block device on which the file system resides. */ struct xfs_buf; +typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); +typedef void (*xfs_buf_relse_t)(struct xfs_buf *); +typedef int (*xfs_buf_bdstrat_t)(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 +#define XB_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; + struct semaphore b_sema; /* semaphore for lockables */ + unsigned long b_queuetime; /* time buffer was queued */ + atomic_t b_pin_count; /* pin count */ + wait_queue_head_t b_waiters; /* unpin waiters */ + struct list_head b_list; + xfs_buf_flags_t b_flags; /* status flags */ + struct list_head b_hash_list; /* hash table list */ + xfs_bufhash_t *b_hash; /* hash table list start */ + xfs_buftarg_t *b_target; /* buffer target (device) */ + atomic_t b_hold; /* reference count */ + xfs_daddr_t b_bn; /* block number for I/O */ + xfs_off_t b_file_offset; /* offset in file */ + size_t b_buffer_length;/* size of buffer in bytes */ + size_t b_count_desired;/* desired transfer size */ + void *b_addr; /* virtual address of buffer */ + struct work_struct b_iodone_work; + atomic_t b_io_remaining; /* #outstanding I/O requests */ + xfs_buf_iodone_t b_iodone; /* I/O completion function */ + xfs_buf_relse_t b_relse; /* releasing function */ + xfs_buf_bdstrat_t b_strat; /* pre-write function */ + struct semaphore b_iodonesema; /* Semaphore for I/O waiters */ + void *b_fspriv; + void *b_fspriv2; + void *b_fspriv3; + unsigned short b_error; /* error code on I/O */ + unsigned short b_locked; /* page array is locked */ + unsigned int b_page_count; /* size of page array */ + unsigned int b_offset; /* page offset in first page */ + struct page **b_pages; /* array of page pointers */ + struct page *b_page_array[XB_PAGES]; /* inline pages */ +#ifdef XFS_BUF_LOCK_TRACKING + int b_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 */ - +extern xfs_buf_t *_xfs_buf_find(xfs_buftarg_t *, xfs_off_t, size_t, + xfs_buf_flags_t, xfs_buf_t *); #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 */ + _xfs_buf_find(buftarg, blkno ,len, lockit, NULL) +extern xfs_buf_t *xfs_buf_get_flags(xfs_buftarg_t *, xfs_off_t, size_t, + xfs_buf_flags_t); #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 */ + xfs_buf_get_flags((target), (blkno), (len), XBF_LOCK | XBF_MAPPED) +extern xfs_buf_t *xfs_buf_read_flags(xfs_buftarg_t *, xfs_off_t, size_t, + xfs_buf_flags_t); #define xfs_buf_read(target, blkno, len, flags) \ - xfs_buf_read_flags((target), (blkno), (len), PBF_LOCK | PBF_MAPPED) - -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 */ + xfs_buf_read_flags((target), (blkno), (len), XBF_LOCK | XBF_MAPPED) -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 */ +extern xfs_buf_t *xfs_buf_get_empty(size_t, xfs_buftarg_t *); +extern xfs_buf_t *xfs_buf_get_noaddr(size_t, xfs_buftarg_t *); +extern int xfs_buf_associate_memory(xfs_buf_t *, void *, size_t); +extern void xfs_buf_hold(xfs_buf_t *); +extern void xfs_buf_readahead(xfs_buftarg_t *, xfs_off_t, size_t, + xfs_buf_flags_t); /* 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 */ +extern void xfs_buf_free(xfs_buf_t *); +extern void xfs_buf_rele(xfs_buf_t *); /* 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 */ +extern int xfs_buf_cond_lock(xfs_buf_t *); +extern int xfs_buf_lock_value(xfs_buf_t *); +extern void xfs_buf_lock(xfs_buf_t *); +extern void xfs_buf_unlock(xfs_buf_t *); /* Buffer Read and Write Routines */ - -extern void pagebuf_iodone( /* mark buffer I/O complete */ - xfs_buf_t *, /* buffer to mark */ - 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) +extern void xfs_buf_ioend(xfs_buf_t *, int); +extern void xfs_buf_ioerror(xfs_buf_t *, int); +extern int xfs_buf_iostart(xfs_buf_t *, xfs_buf_flags_t); +extern int xfs_buf_iorequest(xfs_buf_t *); +extern int xfs_buf_iowait(xfs_buf_t *); +extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, xfs_caddr_t, + xfs_buf_rw_t); + +static inline int xfs_buf_iostrategy(xfs_buf_t *bp) { - return pb->pb_strat ? pb->pb_strat(pb) : pagebuf_iorequest(pb); + return bp->b_strat ? bp->b_strat(bp) : xfs_buf_iorequest(bp); } -static inline int pagebuf_geterror(xfs_buf_t *pb) +static inline int xfs_buf_geterror(xfs_buf_t *bp) { - return pb ? pb->pb_error : ENOMEM; + return bp ? bp->b_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 */ +extern xfs_caddr_t xfs_buf_offset(xfs_buf_t *, size_t); /* 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 */ +extern void xfs_buf_pin(xfs_buf_t *); +extern void xfs_buf_unpin(xfs_buf_t *); +extern int xfs_buf_ispin(xfs_buf_t *); /* Delayed Write Buffer Routines */ - -extern void pagebuf_delwri_dequeue(xfs_buf_t *); +extern void xfs_buf_delwri_dequeue(xfs_buf_t *); /* Buffer Daemon Setup Routines */ +extern int xfs_buf_init(void); +extern void xfs_buf_terminate(void); -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 */ +#ifdef XFS_BUF_TRACE +extern ktrace_t *xfs_buf_trace_buf; +extern void xfs_buf_trace(xfs_buf_t *, char *, void *, void *); #else -# define pagebuf_trace(pb, id, ptr, ra) do { } while (0) +#define xfs_buf_trace(bp,id,ptr,ra) do { } while (0) #endif -#define pagebuf_target_name(target) \ - ({ char __b[BDEVNAME_SIZE]; bdevname((target)->pbr_bdev, __b); __b; }) +#define xfs_buf_target_name(target) \ + ({ char __b[BDEVNAME_SIZE]; bdevname((target)->bt_bdev, __b); __b; }) +#define XFS_B_ASYNC XBF_ASYNC +#define XFS_B_DELWRI XBF_DELWRI +#define XFS_B_READ XBF_READ +#define XFS_B_WRITE XBF_WRITE +#define XFS_B_STALE XBF_STALE -/* 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_TRYLOCK XBF_TRYLOCK +#define XFS_INCORE_TRYLOCK XBF_TRYLOCK +#define XFS_BUF_LOCK XBF_LOCK +#define XFS_BUF_MAPPED XBF_MAPPED -#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_DONE) -#define XFS_BUF_UNDONE(x) ((x)->pb_flags &= ~PBF_DONE) -#define XFS_BUF_ISDONE(x) ((x)->pb_flags & PBF_DONE) - -#define XFS_BUF_BUSY(x) do { } while (0) -#define XFS_BUF_UNBUSY(x) do { } while (0) -#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_ORDERED(x) ((x)->pb_flags |= PBF_ORDERED) -#define XFS_BUF_UNORDERED(x) ((x)->pb_flags &= ~PBF_ORDERED) -#define XFS_BUF_ISORDERED(x) ((x)->pb_flags & PBF_ORDERED) - -#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_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) - -static 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 BUF_BUSY XBF_DONT_BLOCK + +#define XFS_BUF_BFLAGS(bp) ((bp)->b_flags) +#define XFS_BUF_ZEROFLAGS(bp) \ + ((bp)->b_flags &= ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI)) + +#define XFS_BUF_STALE(bp) ((bp)->b_flags |= XFS_B_STALE) +#define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XFS_B_STALE) +#define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XFS_B_STALE) +#define XFS_BUF_SUPER_STALE(bp) do { \ + XFS_BUF_STALE(bp); \ + xfs_buf_delwri_dequeue(bp); \ + XFS_BUF_DONE(bp); \ + } while (0) -#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) +#define XFS_BUF_MANAGE XBF_FS_MANAGED +#define XFS_BUF_UNMANAGE(bp) ((bp)->b_flags &= ~XBF_FS_MANAGED) + +#define XFS_BUF_DELAYWRITE(bp) ((bp)->b_flags |= XBF_DELWRI) +#define XFS_BUF_UNDELAYWRITE(bp) xfs_buf_delwri_dequeue(bp) +#define XFS_BUF_ISDELAYWRITE(bp) ((bp)->b_flags & XBF_DELWRI) + +#define XFS_BUF_ERROR(bp,no) xfs_buf_ioerror(bp,no) +#define XFS_BUF_GETERROR(bp) xfs_buf_geterror(bp) +#define XFS_BUF_ISERROR(bp) (xfs_buf_geterror(bp) ? 1 : 0) + +#define XFS_BUF_DONE(bp) ((bp)->b_flags |= XBF_DONE) +#define XFS_BUF_UNDONE(bp) ((bp)->b_flags &= ~XBF_DONE) +#define XFS_BUF_ISDONE(bp) ((bp)->b_flags & XBF_DONE) + +#define XFS_BUF_BUSY(bp) do { } while (0) +#define XFS_BUF_UNBUSY(bp) do { } while (0) +#define XFS_BUF_ISBUSY(bp) (1) + +#define XFS_BUF_ASYNC(bp) ((bp)->b_flags |= XBF_ASYNC) +#define XFS_BUF_UNASYNC(bp) ((bp)->b_flags &= ~XBF_ASYNC) +#define XFS_BUF_ISASYNC(bp) ((bp)->b_flags & XBF_ASYNC) + +#define XFS_BUF_ORDERED(bp) ((bp)->b_flags |= XBF_ORDERED) +#define XFS_BUF_UNORDERED(bp) ((bp)->b_flags &= ~XBF_ORDERED) +#define XFS_BUF_ISORDERED(bp) ((bp)->b_flags & XBF_ORDERED) + +#define XFS_BUF_SHUT(bp) do { } while (0) +#define XFS_BUF_UNSHUT(bp) do { } while (0) +#define XFS_BUF_ISSHUT(bp) (0) + +#define XFS_BUF_HOLD(bp) xfs_buf_hold(bp) +#define XFS_BUF_READ(bp) ((bp)->b_flags |= XBF_READ) +#define XFS_BUF_UNREAD(bp) ((bp)->b_flags &= ~XBF_READ) +#define XFS_BUF_ISREAD(bp) ((bp)->b_flags & XBF_READ) + +#define XFS_BUF_WRITE(bp) ((bp)->b_flags |= XBF_WRITE) +#define XFS_BUF_UNWRITE(bp) ((bp)->b_flags &= ~XBF_WRITE) +#define XFS_BUF_ISWRITE(bp) ((bp)->b_flags & XBF_WRITE) + +#define XFS_BUF_ISUNINITIAL(bp) (0) +#define XFS_BUF_UNUNINITIAL(bp) (0) + +#define XFS_BUF_BP_ISMAPPED(bp) (1) + +#define XFS_BUF_IODONE_FUNC(bp) ((bp)->b_iodone) +#define XFS_BUF_SET_IODONE_FUNC(bp, func) ((bp)->b_iodone = (func)) +#define XFS_BUF_CLR_IODONE_FUNC(bp) ((bp)->b_iodone = NULL) +#define XFS_BUF_SET_BDSTRAT_FUNC(bp, func) ((bp)->b_strat = (func)) +#define XFS_BUF_CLR_BDSTRAT_FUNC(bp) ((bp)->b_strat = NULL) + +#define XFS_BUF_FSPRIVATE(bp, type) ((type)(bp)->b_fspriv) +#define XFS_BUF_SET_FSPRIVATE(bp, val) ((bp)->b_fspriv = (void*)(val)) +#define XFS_BUF_FSPRIVATE2(bp, type) ((type)(bp)->b_fspriv2) +#define XFS_BUF_SET_FSPRIVATE2(bp, val) ((bp)->b_fspriv2 = (void*)(val)) +#define XFS_BUF_FSPRIVATE3(bp, type) ((type)(bp)->b_fspriv3) +#define XFS_BUF_SET_FSPRIVATE3(bp, val) ((bp)->b_fspriv3 = (void*)(val)) +#define XFS_BUF_SET_START(bp) do { } while (0) +#define XFS_BUF_SET_BRELSE_FUNC(bp, func) ((bp)->b_relse = (func)) + +#define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->b_addr) +#define XFS_BUF_SET_PTR(bp, val, cnt) xfs_buf_associate_memory(bp, val, cnt) +#define XFS_BUF_ADDR(bp) ((bp)->b_bn) +#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_bn = (xfs_daddr_t)(bno)) +#define XFS_BUF_OFFSET(bp) ((bp)->b_file_offset) +#define XFS_BUF_SET_OFFSET(bp, off) ((bp)->b_file_offset = (off)) +#define XFS_BUF_COUNT(bp) ((bp)->b_count_desired) +#define XFS_BUF_SET_COUNT(bp, cnt) ((bp)->b_count_desired = (cnt)) +#define XFS_BUF_SIZE(bp) ((bp)->b_buffer_length) +#define XFS_BUF_SET_SIZE(bp, cnt) ((bp)->b_buffer_length = (cnt)) + +#define XFS_BUF_SET_VTYPE_REF(bp, type, ref) do { } while (0) +#define XFS_BUF_SET_VTYPE(bp, type) do { } while (0) +#define XFS_BUF_SET_REF(bp, ref) do { } while (0) + +#define XFS_BUF_ISPINNED(bp) xfs_buf_ispin(bp) + +#define XFS_BUF_VALUSEMA(bp) xfs_buf_lock_value(bp) +#define XFS_BUF_CPSEMA(bp) (xfs_buf_cond_lock(bp) == 0) +#define XFS_BUF_VSEMA(bp) xfs_buf_unlock(bp) +#define XFS_BUF_PSEMA(bp,x) xfs_buf_lock(bp) +#define XFS_BUF_V_IODONESEMA(bp) up(&bp->b_iodonesema); + +#define XFS_BUF_SET_TARGET(bp, target) ((bp)->b_target = (target)) +#define XFS_BUF_TARGET(bp) ((bp)->b_target) +#define XFS_BUFTARG_NAME(target) xfs_buf_target_name(target) + +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); + bp->b_fspriv3 = mp; + bp->b_strat = xfs_bdstrat_cb; + xfs_buf_delwri_dequeue(bp); + return xfs_buf_iostart(bp, XBF_WRITE | XBF_ASYNC | _XBF_RUN_QUEUES); } -static inline void xfs_buf_relse(xfs_buf_t *bp) +static inline void xfs_buf_relse(xfs_buf_t *bp) { - if (!bp->pb_relse) - pagebuf_unlock(bp); - pagebuf_rele(bp); + if (!bp->b_relse) + xfs_buf_unlock(bp); + xfs_buf_rele(bp); } -#define xfs_bpin(bp) pagebuf_pin(bp) -#define xfs_bunpin(bp) pagebuf_unpin(bp) +#define xfs_bpin(bp) xfs_buf_pin(bp) +#define xfs_bunpin(bp) xfs_buf_unpin(bp) #define xfs_buftrace(id, bp) \ - pagebuf_trace(bp, id, NULL, (void *)__builtin_return_address(0)) + xfs_buf_trace(bp, id, NULL, (void *)__builtin_return_address(0)) -#define xfs_biodone(pb) \ - pagebuf_iodone(pb, 0) +#define xfs_biodone(bp) xfs_buf_ioend(bp, 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_biomove(bp, off, len, data, rw) \ + xfs_buf_iomove((bp), (off), (len), (data), \ + ((rw) == XFS_B_WRITE) ? XBRW_WRITE : XBRW_READ) -#define xfs_biozero(pb, off, len) \ - pagebuf_iomove((pb), (off), (len), NULL, PBRW_ZERO) +#define xfs_biozero(bp, off, len) \ + xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO) -static inline int XFS_bwrite(xfs_buf_t *pb) +static inline int XFS_bwrite(xfs_buf_t *bp) { - int iowait = (pb->pb_flags & PBF_ASYNC) == 0; + int iowait = (bp->b_flags & XBF_ASYNC) == 0; int error = 0; if (!iowait) - pb->pb_flags |= _PBF_RUN_QUEUES; + bp->b_flags |= _XBF_RUN_QUEUES; - pagebuf_delwri_dequeue(pb); - pagebuf_iostrategy(pb); + xfs_buf_delwri_dequeue(bp); + xfs_buf_iostrategy(bp); if (iowait) { - error = pagebuf_iowait(pb); - xfs_buf_relse(pb); + error = xfs_buf_iowait(bp); + xfs_buf_relse(bp); } return error; } -#define XFS_bdwrite(pb) \ - pagebuf_iostart(pb, PBF_DELWRI | PBF_ASYNC) +#define XFS_bdwrite(bp) xfs_buf_iostart(bp, XBF_DELWRI | XBF_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); + bp->b_strat = xfs_bdstrat_cb; + bp->b_fspriv3 = mp; + return xfs_buf_iostart(bp, XBF_DELWRI | XBF_ASYNC); } -#define XFS_bdstrat(bp) pagebuf_iorequest(bp) +#define XFS_bdstrat(bp) xfs_buf_iorequest(bp) -#define xfs_iowait(pb) pagebuf_iowait(pb) +#define xfs_iowait(bp) xfs_buf_iowait(bp) #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) + xfs_buf_readahead((target), (rablkno), (ralen), XBF_DONT_BLOCK) /* * 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 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) +#define xfs_getsize_buftarg(buftarg) block_size((buftarg)->bt_bdev) +#define xfs_readonly_buftarg(buftarg) bdev_read_only((buftarg)->bt_bdev) + +#define xfs_binval(buftarg) xfs_flush_buftarg(buftarg, 1) +#define XFS_bflush(buftarg) xfs_flush_buftarg(buftarg, 1) #endif /* __XFS_BUF_H__ */ |