X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fbuffer_head.h;h=3ce64b90118c20346a704d1c727ec9450d7ccb95;hb=5b37717a23b8e40f6cf7ad85a26ddcf41c171e2c;hp=5d9fb0e94156235eca46e199352933fc638b9596;hpb=58ff407bee5a55f9c1188a3f9d70ffc79485183c;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 5d9fb0e..3ce64b9 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -34,6 +34,7 @@ enum bh_state_bits { BH_Write_EIO, /* I/O error on write */ BH_Ordered, /* ordered write */ BH_Eopnotsupp, /* operation not supported (barrier) */ + BH_Unwritten, /* Buffer is allocated on disk but not written */ BH_PrivateStart,/* not a state bit, but the first bit available * for private allocation by other entities @@ -114,7 +115,6 @@ BUFFER_FNS(Uptodate, uptodate) BUFFER_FNS(Dirty, dirty) TAS_BUFFER_FNS(Dirty, dirty) BUFFER_FNS(Lock, locked) -TAS_BUFFER_FNS(Lock, locked) BUFFER_FNS(Req, req) TAS_BUFFER_FNS(Req, req) BUFFER_FNS(Mapped, mapped) @@ -126,6 +126,7 @@ BUFFER_FNS(Boundary, boundary) BUFFER_FNS(Write_EIO, write_io_error) BUFFER_FNS(Ordered, ordered) BUFFER_FNS(Eopnotsupp, eopnotsupp) +BUFFER_FNS(Unwritten, unwritten) #define bh_offset(bh) ((unsigned long)(bh)->b_data & ~PAGE_MASK) #define touch_buffer(bh) mark_page_accessed(bh->b_page) @@ -142,7 +143,7 @@ BUFFER_FNS(Eopnotsupp, eopnotsupp) * Declarations */ -void FASTCALL(mark_buffer_dirty(struct buffer_head *bh)); +void mark_buffer_dirty(struct buffer_head *bh); void init_buffer(struct buffer_head *, bh_end_io_t *, void *); void set_bh_page(struct buffer_head *bh, struct page *page, unsigned long offset); @@ -163,7 +164,7 @@ int sync_mapping_buffers(struct address_space *mapping); void unmap_underlying_metadata(struct block_device *bdev, sector_t block); void mark_buffer_async_write(struct buffer_head *bh); -void invalidate_bdev(struct block_device *, int); +void invalidate_bdev(struct block_device *); int sync_blockdev(struct block_device *bdev); void __wait_on_buffer(struct buffer_head *); wait_queue_head_t *bh_waitq_head(struct buffer_head *bh); @@ -172,21 +173,26 @@ struct super_block *freeze_bdev(struct block_device *); void thaw_bdev(struct block_device *, struct super_block *); int fsync_super(struct super_block *); int fsync_no_super(struct block_device *); -struct buffer_head *__find_get_block(struct block_device *, sector_t, int); -struct buffer_head * __getblk(struct block_device *, sector_t, int); +struct buffer_head *__find_get_block(struct block_device *bdev, sector_t block, + unsigned size); +struct buffer_head *__getblk(struct block_device *bdev, sector_t block, + unsigned size); void __brelse(struct buffer_head *); void __bforget(struct buffer_head *); -void __breadahead(struct block_device *, sector_t block, int size); -struct buffer_head *__bread(struct block_device *, sector_t block, int size); +void __breadahead(struct block_device *, sector_t block, unsigned int size); +struct buffer_head *__bread(struct block_device *, sector_t block, unsigned size); +void invalidate_bh_lrus(void); struct buffer_head *alloc_buffer_head(gfp_t gfp_flags); void free_buffer_head(struct buffer_head * bh); -void FASTCALL(unlock_buffer(struct buffer_head *bh)); -void FASTCALL(__lock_buffer(struct buffer_head *bh)); +void unlock_buffer(struct buffer_head *bh); +void __lock_buffer(struct buffer_head *bh); void ll_rw_block(int, int, struct buffer_head * bh[]); int sync_dirty_buffer(struct buffer_head *bh); int submit_bh(int, struct buffer_head *); void write_boundary_block(struct block_device *bdev, sector_t bblock, unsigned blocksize); +int bh_uptodate_or_lock(struct buffer_head *bh); +int bh_submit_read(struct buffer_head *bh); extern int buffer_heads_over_limit; @@ -198,20 +204,37 @@ void block_invalidatepage(struct page *page, unsigned long offset); int block_write_full_page(struct page *page, get_block_t *get_block, struct writeback_control *wbc); int block_read_full_page(struct page*, get_block_t*); +int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc, + unsigned long from); +int block_write_begin(struct file *, struct address_space *, + loff_t, unsigned, unsigned, + struct page **, void **, get_block_t*); +int block_write_end(struct file *, struct address_space *, + loff_t, unsigned, unsigned, + struct page *, void *); +int generic_write_end(struct file *, struct address_space *, + loff_t, unsigned, unsigned, + struct page *, void *); +void page_zero_new_buffers(struct page *page, unsigned from, unsigned to); int block_prepare_write(struct page*, unsigned, unsigned, get_block_t*); -int cont_prepare_write(struct page*, unsigned, unsigned, get_block_t*, - loff_t *); -int generic_cont_expand(struct inode *inode, loff_t size); +int cont_write_begin(struct file *, struct address_space *, loff_t, + unsigned, unsigned, struct page **, void **, + get_block_t *, loff_t *); int generic_cont_expand_simple(struct inode *inode, loff_t size); int block_commit_write(struct page *page, unsigned from, unsigned to); +int block_page_mkwrite(struct vm_area_struct *vma, struct page *page, + get_block_t get_block); void block_sync_page(struct page *); sector_t generic_block_bmap(struct address_space *, sector_t, get_block_t *); -int generic_commit_write(struct file *, struct page *, unsigned, unsigned); int block_truncate_page(struct address_space *, loff_t, get_block_t *); int file_fsync(struct file *, struct dentry *, int); -int nobh_prepare_write(struct page*, unsigned, unsigned, get_block_t*); -int nobh_commit_write(struct file *, struct page *, unsigned, unsigned); -int nobh_truncate_page(struct address_space *, loff_t); +int nobh_write_begin(struct file *, struct address_space *, + loff_t, unsigned, unsigned, + struct page **, void **, get_block_t*); +int nobh_write_end(struct file *, struct address_space *, + loff_t, unsigned, unsigned, + struct page *, void *); +int nobh_truncate_page(struct address_space *, loff_t, get_block_t *); int nobh_writepage(struct page *page, get_block_t *get_block, struct writeback_control *wbc); @@ -297,10 +320,15 @@ static inline void wait_on_buffer(struct buffer_head *bh) __wait_on_buffer(bh); } +static inline int trylock_buffer(struct buffer_head *bh) +{ + return likely(!test_and_set_bit_lock(BH_Lock, &bh->b_state)); +} + static inline void lock_buffer(struct buffer_head *bh) { might_sleep(); - if (test_set_buffer_locked(bh)) + if (!trylock_buffer(bh)) __lock_buffer(bh); } @@ -315,7 +343,7 @@ static inline int inode_has_buffers(struct inode *inode) { return 0; } static inline void invalidate_inode_buffers(struct inode *inode) {} static inline int remove_inode_buffers(struct inode *inode) { return 1; } static inline int sync_mapping_buffers(struct address_space *mapping) { return 0; } -static inline void invalidate_bdev(struct block_device *bdev, int destroy_dirty_buffers) {} +static inline void invalidate_bdev(struct block_device *bdev) {} #endif /* CONFIG_BLOCK */