diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/buffer_head.h | 10 | ||||
| -rw-r--r-- | include/linux/fs.h | 30 | ||||
| -rw-r--r-- | include/linux/pagemap.h | 2 |
3 files changed, 41 insertions, 1 deletions
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 35cadad84b14..a562ecfb1a14 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -203,6 +203,16 @@ 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_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 *); diff --git a/include/linux/fs.h b/include/linux/fs.h index 86ce27c72554..e9344e6f877d 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -394,6 +394,8 @@ enum positive_aop_returns { AOP_TRUNCATED_PAGE = 0x80001, }; +#define AOP_FLAG_UNINTERRUPTIBLE 0x0001 /* will not do a short write */ + /* * oh the beauties of C type declarations. */ @@ -413,7 +415,7 @@ size_t iov_iter_copy_from_user_atomic(struct page *page, size_t iov_iter_copy_from_user(struct page *page, struct iov_iter *i, unsigned long offset, size_t bytes); void iov_iter_advance(struct iov_iter *i, size_t bytes); -int iov_iter_fault_in_readable(struct iov_iter *i); +int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes); size_t iov_iter_single_seg_count(struct iov_iter *i); static inline void iov_iter_init(struct iov_iter *i, @@ -454,6 +456,14 @@ struct address_space_operations { */ int (*prepare_write)(struct file *, struct page *, unsigned, unsigned); int (*commit_write)(struct file *, struct page *, unsigned, unsigned); + + int (*write_begin)(struct file *, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata); + int (*write_end)(struct file *, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *page, void *fsdata); + /* Unfortunately this kludge is needed for FIBMAP. Don't use it */ sector_t (*bmap)(struct address_space *, sector_t); void (*invalidatepage) (struct page *, unsigned long); @@ -468,6 +478,18 @@ struct address_space_operations { int (*launder_page) (struct page *); }; +/* + * pagecache_write_begin/pagecache_write_end must be used by general code + * to write into the pagecache. + */ +int pagecache_write_begin(struct file *, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata); + +int pagecache_write_end(struct file *, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *page, void *fsdata); + struct backing_dev_info; struct address_space { struct inode *host; /* owner: inode, block_device */ @@ -1866,6 +1888,12 @@ extern int simple_prepare_write(struct file *file, struct page *page, unsigned offset, unsigned to); extern int simple_commit_write(struct file *file, struct page *page, unsigned offset, unsigned to); +extern int simple_write_begin(struct file *file, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata); +extern int simple_write_end(struct file *file, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *page, void *fsdata); extern struct dentry *simple_lookup(struct inode *, struct dentry *, struct nameidata *); extern ssize_t generic_read_dir(struct file *, char __user *, size_t, loff_t *); diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 8f1e390fd71b..db8a410ae9e1 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -96,6 +96,8 @@ unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t start, unsigned find_get_pages_tag(struct address_space *mapping, pgoff_t *index, int tag, unsigned int nr_pages, struct page **pages); +struct page *__grab_cache_page(struct address_space *mapping, pgoff_t index); + /* * Returns locked page at given index in given cache, creating it if needed. */ |