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/minix/dir.c | 21 +++++++-------------- fs/minix/inode.c | 11 +++++------ fs/minix/minix.h | 4 +--- 3 files changed, 13 insertions(+), 23 deletions(-) (limited to 'fs/minix') diff --git a/fs/minix/dir.c b/fs/minix/dir.c index 1dbf921ca44b..085a9262c692 100644 --- a/fs/minix/dir.c +++ b/fs/minix/dir.c @@ -271,8 +271,7 @@ int minix_add_link(struct dentry *dentry, struct inode *inode) got_it: pos = page_offset(page) + p - (char *)page_address(page); - err = __minix_write_begin(NULL, page->mapping, pos, sbi->s_dirsize, - AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); + err = minix_prepare_chunk(page, pos, sbi->s_dirsize); if (err) goto out_unlock; memcpy (namx, name, namelen); @@ -297,8 +296,7 @@ out_unlock: int minix_delete_entry(struct minix_dir_entry *de, struct page *page) { - struct address_space *mapping = page->mapping; - struct inode *inode = (struct inode*)mapping->host; + struct inode *inode = page->mapping->host; char *kaddr = page_address(page); loff_t pos = page_offset(page) + (char*)de - kaddr; struct minix_sb_info *sbi = minix_sb(inode->i_sb); @@ -306,8 +304,7 @@ int minix_delete_entry(struct minix_dir_entry *de, struct page *page) int err; lock_page(page); - err = __minix_write_begin(NULL, mapping, pos, len, - AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); + err = minix_prepare_chunk(page, pos, len); if (err == 0) { if (sbi->s_version == MINIX_V3) ((minix3_dirent *) de)->inode = 0; @@ -325,16 +322,14 @@ int minix_delete_entry(struct minix_dir_entry *de, struct page *page) int minix_make_empty(struct inode *inode, struct inode *dir) { - struct address_space *mapping = inode->i_mapping; - struct page *page = grab_cache_page(mapping, 0); + struct page *page = grab_cache_page(inode->i_mapping, 0); struct minix_sb_info *sbi = minix_sb(inode->i_sb); char *kaddr; int err; if (!page) return -ENOMEM; - err = __minix_write_begin(NULL, mapping, 0, 2 * sbi->s_dirsize, - AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); + err = minix_prepare_chunk(page, 0, 2 * sbi->s_dirsize); if (err) { unlock_page(page); goto fail; @@ -425,8 +420,7 @@ not_empty: void minix_set_link(struct minix_dir_entry *de, struct page *page, struct inode *inode) { - struct address_space *mapping = page->mapping; - struct inode *dir = mapping->host; + struct inode *dir = page->mapping->host; struct minix_sb_info *sbi = minix_sb(dir->i_sb); loff_t pos = page_offset(page) + (char *)de-(char*)page_address(page); @@ -434,8 +428,7 @@ void minix_set_link(struct minix_dir_entry *de, struct page *page, lock_page(page); - err = __minix_write_begin(NULL, mapping, pos, sbi->s_dirsize, - AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); + err = minix_prepare_chunk(page, pos, sbi->s_dirsize); if (err == 0) { if (sbi->s_version == MINIX_V3) ((minix3_dirent *) de)->inode = inode->i_ino; diff --git a/fs/minix/inode.c b/fs/minix/inode.c index 756f8c93780c..f4abe45229bb 100644 --- a/fs/minix/inode.c +++ b/fs/minix/inode.c @@ -357,12 +357,10 @@ static int minix_readpage(struct file *file, struct page *page) return block_read_full_page(page,minix_get_block); } -int __minix_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) +int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len) { - return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, - minix_get_block); + return block_write_begin_newtrunc(NULL, page->mapping, pos, len, 0, + &page, NULL, minix_get_block); } static int minix_write_begin(struct file *file, struct address_space *mapping, @@ -370,7 +368,8 @@ static int minix_write_begin(struct file *file, struct address_space *mapping, struct page **pagep, void **fsdata) { *pagep = NULL; - return __minix_write_begin(file, mapping, pos, len, flags, pagep, fsdata); + return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, + minix_get_block); } static sector_t minix_bmap(struct address_space *mapping, sector_t block) diff --git a/fs/minix/minix.h b/fs/minix/minix.h index 111f34ee9e3b..407b1c84911e 100644 --- a/fs/minix/minix.h +++ b/fs/minix/minix.h @@ -53,9 +53,7 @@ extern int minix_new_block(struct inode * inode); extern void minix_free_block(struct inode *inode, unsigned long block); extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi); extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *); -extern int __minix_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata); +extern int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len); extern void V1_minix_truncate(struct inode *); extern void V2_minix_truncate(struct inode *); -- cgit v1.2.3