From f4e420dc423148fba637af1ab618fa8896dfb2d6 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 4 Jun 2010 11:29:56 +0200 Subject: clean up write_begin usage for directories in pagecache For filesystem that implement directories in pagecache we call block_write_begin with an already allocated page for this code, while the normal regular file write path uses the default block_write_begin behaviour. Get rid of the __foofs_write_begin helper and opencode the normal write_begin call in foofs_write_begin, while adding a new foofs_prepare_chunk helper for the directory code. The added benefit is that foofs_prepare_chunk has a much saner calling convention. Note that the interruptible flag passed into block_write_begin is always ignored if we already pass in a page (see next patch for details), and we never were doing truncations of exessive blocks for this case either so we can switch directly to block_write_begin_newtrunc. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- fs/ufs/dir.c | 13 ++++--------- fs/ufs/inode.c | 11 +++++------ fs/ufs/util.h | 4 +--- 3 files changed, 10 insertions(+), 18 deletions(-) (limited to 'fs/ufs') diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c index ec784756dc65..dbc90994715a 100644 --- a/fs/ufs/dir.c +++ b/fs/ufs/dir.c @@ -95,8 +95,7 @@ void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de, int err; lock_page(page); - err = __ufs_write_begin(NULL, page->mapping, pos, len, - AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); + err = ufs_prepare_chunk(page, pos, len); BUG_ON(err); de->d_ino = cpu_to_fs32(dir->i_sb, inode->i_ino); @@ -381,8 +380,7 @@ int ufs_add_link(struct dentry *dentry, struct inode *inode) got_it: pos = page_offset(page) + (char*)de - (char*)page_address(page); - err = __ufs_write_begin(NULL, page->mapping, pos, rec_len, - AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); + err = ufs_prepare_chunk(page, pos, rec_len); if (err) goto out_unlock; if (de->d_ino) { @@ -518,7 +516,6 @@ int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir, struct page * page) { struct super_block *sb = inode->i_sb; - struct address_space *mapping = page->mapping; char *kaddr = page_address(page); unsigned from = ((char*)dir - kaddr) & ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1); unsigned to = ((char*)dir - kaddr) + fs16_to_cpu(sb, dir->d_reclen); @@ -549,8 +546,7 @@ int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir, pos = page_offset(page) + from; lock_page(page); - err = __ufs_write_begin(NULL, mapping, pos, to - from, - AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); + err = ufs_prepare_chunk(page, pos, to - from); BUG_ON(err); if (pde) pde->d_reclen = cpu_to_fs16(sb, to - from); @@ -577,8 +573,7 @@ int ufs_make_empty(struct inode * inode, struct inode *dir) if (!page) return -ENOMEM; - err = __ufs_write_begin(NULL, mapping, 0, chunk_size, - AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); + err = ufs_prepare_chunk(page, 0, chunk_size); if (err) { unlock_page(page); goto fail; diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c index 73fe773aa034..a9555b1ffd28 100644 --- a/fs/ufs/inode.c +++ b/fs/ufs/inode.c @@ -558,12 +558,10 @@ static int ufs_readpage(struct file *file, struct page *page) return block_read_full_page(page,ufs_getfrag_block); } -int __ufs_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) +int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) { - return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, - ufs_getfrag_block); + return block_write_begin_newtrunc(NULL, page->mapping, pos, len, 0, + &page, NULL, ufs_getfrag_block); } static int ufs_write_begin(struct file *file, struct address_space *mapping, @@ -571,7 +569,8 @@ static int ufs_write_begin(struct file *file, struct address_space *mapping, struct page **pagep, void **fsdata) { *pagep = NULL; - return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata); + return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, + ufs_getfrag_block); } static sector_t ufs_bmap(struct address_space *mapping, sector_t block) diff --git a/fs/ufs/util.h b/fs/ufs/util.h index 23ceed8c8fb9..0466036912f1 100644 --- a/fs/ufs/util.h +++ b/fs/ufs/util.h @@ -257,9 +257,7 @@ ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value) extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *); extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t); -extern int __ufs_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata); +extern int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len); /* * These functions manipulate ufs buffers -- cgit v1.2.3