X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Flibfs.c;h=d93842d3c0a0b66943a0491622e0793971d70de5;hb=7a0079d9e3fe8826475a08785f3d348c4b509774;hp=1b1156381787896bdbb4b4a22c40897435e69241;hpb=726c334223180e3c0197cc980a432681370d4baf;p=safe%2Fjmp%2Flinux-2.6

diff --git a/fs/libfs.c b/fs/libfs.c
index 1b11563..d93842d 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -63,7 +63,7 @@ int dcache_dir_open(struct inode *inode, struct file *file)
 {
 	static struct qstr cursor_name = {.len = 1, .name = "."};
 
-	file->private_data = d_alloc(file->f_dentry, &cursor_name);
+	file->private_data = d_alloc(file->f_path.dentry, &cursor_name);
 
 	return file->private_data ? 0 : -ENOMEM;
 }
@@ -76,7 +76,7 @@ int dcache_dir_close(struct inode *inode, struct file *file)
 
 loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 {
-	mutex_lock(&file->f_dentry->d_inode->i_mutex);
+	mutex_lock(&file->f_path.dentry->d_inode->i_mutex);
 	switch (origin) {
 		case 1:
 			offset += file->f_pos;
@@ -84,7 +84,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 			if (offset >= 0)
 				break;
 		default:
-			mutex_unlock(&file->f_dentry->d_inode->i_mutex);
+			mutex_unlock(&file->f_path.dentry->d_inode->i_mutex);
 			return -EINVAL;
 	}
 	if (offset != file->f_pos) {
@@ -96,8 +96,8 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 
 			spin_lock(&dcache_lock);
 			list_del(&cursor->d_u.d_child);
-			p = file->f_dentry->d_subdirs.next;
-			while (n && p != &file->f_dentry->d_subdirs) {
+			p = file->f_path.dentry->d_subdirs.next;
+			while (n && p != &file->f_path.dentry->d_subdirs) {
 				struct dentry *next;
 				next = list_entry(p, struct dentry, d_u.d_child);
 				if (!d_unhashed(next) && next->d_inode)
@@ -108,7 +108,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 			spin_unlock(&dcache_lock);
 		}
 	}
-	mutex_unlock(&file->f_dentry->d_inode->i_mutex);
+	mutex_unlock(&file->f_path.dentry->d_inode->i_mutex);
 	return offset;
 }
 
@@ -126,7 +126,7 @@ static inline unsigned char dt_type(struct inode *inode)
 
 int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
 {
-	struct dentry *dentry = filp->f_dentry;
+	struct dentry *dentry = filp->f_path.dentry;
 	struct dentry *cursor = filp->private_data;
 	struct list_head *p, *q = &cursor->d_u.d_child;
 	ino_t ino;
@@ -149,10 +149,9 @@ int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
 			/* fallthrough */
 		default:
 			spin_lock(&dcache_lock);
-			if (filp->f_pos == 2) {
-				list_del(q);
-				list_add(q, &dentry->d_subdirs);
-			}
+			if (filp->f_pos == 2)
+				list_move(q, &dentry->d_subdirs);
+
 			for (p=q->next; p != &dentry->d_subdirs; p=p->next) {
 				struct dentry *next;
 				next = list_entry(p, struct dentry, d_u.d_child);
@@ -164,8 +163,7 @@ int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
 					return 0;
 				spin_lock(&dcache_lock);
 				/* next is still alive */
-				list_del(q);
-				list_add(q, p);
+				list_move(q, p);
 				p = q;
 				filp->f_pos++;
 			}
@@ -188,20 +186,23 @@ const struct file_operations simple_dir_operations = {
 	.fsync		= simple_sync_file,
 };
 
-struct inode_operations simple_dir_inode_operations = {
+const struct inode_operations simple_dir_inode_operations = {
 	.lookup		= simple_lookup,
 };
 
+static const struct super_operations simple_super_operations = {
+	.statfs		= simple_statfs,
+};
+
 /*
  * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
  * will never be mountable)
  */
 int get_sb_pseudo(struct file_system_type *fs_type, char *name,
-	struct super_operations *ops, unsigned long magic,
+	const struct super_operations *ops, unsigned long magic,
 	struct vfsmount *mnt)
 {
 	struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
-	static struct super_operations default_ops = {.statfs = simple_statfs};
 	struct dentry *dentry;
 	struct inode *root;
 	struct qstr d_name = {.name = name, .len = strlen(name)};
@@ -214,7 +215,7 @@ int get_sb_pseudo(struct file_system_type *fs_type, char *name,
 	s->s_blocksize = 1024;
 	s->s_blocksize_bits = 10;
 	s->s_magic = magic;
-	s->s_op = ops ? ops : &default_ops;
+	s->s_op = ops ? ops : &simple_super_operations;
 	s->s_time_gran = 1;
 	root = new_inode(s);
 	if (!root)
@@ -245,7 +246,7 @@ int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *den
 	struct inode *inode = old_dentry->d_inode;
 
 	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
-	inode->i_nlink++;
+	inc_nlink(inode);
 	atomic_inc(&inode->i_count);
 	dget(dentry);
 	d_instantiate(dentry, inode);
@@ -277,7 +278,7 @@ int simple_unlink(struct inode *dir, struct dentry *dentry)
 	struct inode *inode = dentry->d_inode;
 
 	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
-	inode->i_nlink--;
+	drop_nlink(inode);
 	dput(dentry);
 	return 0;
 }
@@ -287,9 +288,9 @@ int simple_rmdir(struct inode *dir, struct dentry *dentry)
 	if (!simple_empty(dentry))
 		return -ENOTEMPTY;
 
-	dentry->d_inode->i_nlink--;
+	drop_nlink(dentry->d_inode);
 	simple_unlink(dir, dentry);
-	dir->i_nlink--;
+	drop_nlink(dir);
 	return 0;
 }
 
@@ -305,10 +306,10 @@ int simple_rename(struct inode *old_dir, struct dentry *old_dentry,
 	if (new_dentry->d_inode) {
 		simple_unlink(new_dir, new_dentry);
 		if (they_are_dirs)
-			old_dir->i_nlink--;
+			drop_nlink(old_dir);
 	} else if (they_are_dirs) {
-		old_dir->i_nlink--;
-		new_dir->i_nlink++;
+		drop_nlink(old_dir);
+		inc_nlink(new_dir);
 	}
 
 	old_dir->i_ctime = old_dir->i_mtime = new_dir->i_ctime =
@@ -319,17 +320,9 @@ int simple_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 int simple_readpage(struct file *file, struct page *page)
 {
-	void *kaddr;
-
-	if (PageUptodate(page))
-		goto out;
-
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr, 0, PAGE_CACHE_SIZE);
-	kunmap_atomic(kaddr, KM_USER0);
+	clear_highpage(page);
 	flush_dcache_page(page);
 	SetPageUptodate(page);
-out:
 	unlock_page(page);
 	return 0;
 }
@@ -345,17 +338,18 @@ int simple_prepare_write(struct file *file, struct page *page,
 			flush_dcache_page(page);
 			kunmap_atomic(kaddr, KM_USER0);
 		}
-		SetPageUptodate(page);
 	}
 	return 0;
 }
 
 int simple_commit_write(struct file *file, struct page *page,
-			unsigned offset, unsigned to)
+			unsigned from, unsigned to)
 {
 	struct inode *inode = page->mapping->host;
 	loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
 
+	if (!PageUptodate(page))
+		SetPageUptodate(page);
 	/*
 	 * No need to use i_size_read() here, the i_size
 	 * cannot change under us because we hold the i_mutex.
@@ -368,7 +362,6 @@ int simple_commit_write(struct file *file, struct page *page,
 
 int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files)
 {
-	static struct super_operations s_ops = {.statfs = simple_statfs};
 	struct inode *inode;
 	struct dentry *root;
 	struct dentry *dentry;
@@ -377,7 +370,7 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
 	s->s_blocksize = PAGE_CACHE_SIZE;
 	s->s_blocksize_bits = PAGE_CACHE_SHIFT;
 	s->s_magic = magic;
-	s->s_op = &s_ops;
+	s->s_op = &simple_super_operations;
 	s->s_time_gran = 1;
 
 	inode = new_inode(s);
@@ -385,7 +378,6 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
 		return -ENOMEM;
 	inode->i_mode = S_IFDIR | 0755;
 	inode->i_uid = inode->i_gid = 0;
-	inode->i_blksize = PAGE_CACHE_SIZE;
 	inode->i_blocks = 0;
 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	inode->i_op = &simple_dir_inode_operations;
@@ -407,7 +399,6 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
 			goto out;
 		inode->i_mode = S_IFREG | files->mode;
 		inode->i_uid = inode->i_gid = 0;
-		inode->i_blksize = PAGE_CACHE_SIZE;
 		inode->i_blocks = 0;
 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 		inode->i_fop = files->ops;
@@ -424,13 +415,13 @@ out:
 
 static DEFINE_SPINLOCK(pin_fs_lock);
 
-int simple_pin_fs(char *name, struct vfsmount **mount, int *count)
+int simple_pin_fs(struct file_system_type *type, struct vfsmount **mount, int *count)
 {
 	struct vfsmount *mnt = NULL;
 	spin_lock(&pin_fs_lock);
 	if (unlikely(!*mount)) {
 		spin_unlock(&pin_fs_lock);
-		mnt = do_kern_mount(name, 0, name, NULL);
+		mnt = vfs_kern_mount(type, 0, type->name, NULL);
 		if (IS_ERR(mnt))
 			return PTR_ERR(mnt);
 		spin_lock(&pin_fs_lock);
@@ -549,7 +540,7 @@ int simple_attr_open(struct inode *inode, struct file *file,
 
 	attr->get = get;
 	attr->set = set;
-	attr->data = inode->u.generic_ip;
+	attr->data = inode->i_private;
 	attr->fmt = fmt;
 	mutex_init(&attr->mutex);