--- a/fs/yaffs2/yaffs_fs.c +++ b/fs/yaffs2/yaffs_fs.c @@ -207,10 +207,20 @@ static int yaffs_writepage(struct page * #else static int yaffs_writepage(struct page *page); #endif + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)) +static int yaffs_write_begin(struct file *f, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata); +static int yaffs_write_end(struct file *f, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *pg, void *fsdata); +#else static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to); static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to); +#endif static int yaffs_readlink(struct dentry *dentry, char __user * buffer, int buflen); @@ -223,8 +233,13 @@ static int yaffs_follow_link(struct dent static struct address_space_operations yaffs_file_address_operations = { .readpage = yaffs_readpage, .writepage = yaffs_writepage, +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)) + .write_begin = yaffs_write_begin, + .write_end = yaffs_write_end, +#else .prepare_write = yaffs_prepare_write, .commit_write = yaffs_commit_write, +#endif }; #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22)) @@ -687,6 +702,74 @@ static int yaffs_writepage(struct page * return (nWritten == nBytes) ? 0 : -ENOSPC; } +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)) +static int yaffs_write_begin(struct file *f, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata) +{ + struct page *pg; + pgoff_t index = pos >> PAGE_CACHE_SHIFT; + int ret = 0; + + pg = __grab_cache_page(mapping, index); + if (!pg) + return -ENOMEM; + + *pagep = pg; + + T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_begin\n")); + if (!Page_Uptodate(pg)) { + ret = yaffs_readpage_nolock(f, pg); + if (ret) + goto err_unlock; + } + + T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_begin\n")); + return 0; + + err_unlock: + unlock_page(pg); + page_cache_release(pg); + return ret; +} + +static int yaffs_write_end(struct file *f, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *pg, void *fsdata) +{ + void *addr = page_address(pg) + (pos & (PAGE_CACHE_SIZE - 1)); + loff_t pos2; + int nBytes = copied; + int nWritten; + + T(YAFFS_TRACE_OS, + (KERN_DEBUG "yaffs_write_end addr %x pos %x nBytes %d\n", (unsigned)addr, + (unsigned)pos, nBytes)); + + pos2 = pos; + nWritten = yaffs_file_write(f, addr, nBytes, &pos2); + + if (nWritten != nBytes) { + T(YAFFS_TRACE_OS, + (KERN_DEBUG + "yaffs_write_end not same size nWritten %d nBytes %d\n", + nWritten, nBytes)); + SetPageError(pg); + ClearPageUptodate(pg); + } else { + SetPageUptodate(pg); + } + + T(YAFFS_TRACE_OS, + (KERN_DEBUG "yaffs_write_end returning %d\n", + nWritten == nBytes ? nWritten : 0)); + + unlock_page(pg); + page_cache_release(pg); + + return (nWritten == nBytes) ? nWritten : 0; +} +#else static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to) { @@ -735,6 +818,7 @@ static int yaffs_commit_write(struct fil return nWritten == nBytes ? 0 : nWritten; } +#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)) */ static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj) {