X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fnamei.c;h=21d85f1ac8395f82376e2dd5073494d568080e78;hb=b01ef8ffafc5239a871bc24af74f604654e7de2b;hp=4a27eb798118957544d52c9edbe013f30ce9cc43;hpb=8066eff0a1a0703ad901dbe5646a47dbfc089ef2;p=linux-2.6

diff --git a/fs/namei.c b/fs/namei.c
index 4a27eb7981..21d85f1ac8 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -501,6 +501,7 @@ struct path {
 static inline int __do_follow_link(struct path *path, struct nameidata *nd)
 {
 	int error;
+	void *cookie;
 	struct dentry *dentry = path->dentry;
 
 	touch_atime(path->mnt, dentry);
@@ -508,13 +509,15 @@ static inline int __do_follow_link(struct path *path, struct nameidata *nd)
 
 	if (path->mnt == nd->mnt)
 		mntget(path->mnt);
-	error = dentry->d_inode->i_op->follow_link(dentry, nd);
-	if (!error) {
+	cookie = dentry->d_inode->i_op->follow_link(dentry, nd);
+	error = PTR_ERR(cookie);
+	if (!IS_ERR(cookie)) {
 		char *s = nd_get_link(nd);
+		error = 0;
 		if (s)
 			error = __vfs_follow_link(nd, s);
 		if (dentry->d_inode->i_op->put_link)
-			dentry->d_inode->i_op->put_link(dentry, nd);
+			dentry->d_inode->i_op->put_link(dentry, nd, cookie);
 	}
 	dput(dentry);
 	mntput(path->mnt);
@@ -522,6 +525,22 @@ static inline int __do_follow_link(struct path *path, struct nameidata *nd)
 	return error;
 }
 
+static inline void dput_path(struct path *path, struct nameidata *nd)
+{
+	dput(path->dentry);
+	if (path->mnt != nd->mnt)
+		mntput(path->mnt);
+}
+
+static inline void path_to_nameidata(struct path *path, struct nameidata *nd)
+{
+	dput(nd->dentry);
+	if (nd->mnt != path->mnt)
+		mntput(nd->mnt);
+	nd->mnt = path->mnt;
+	nd->dentry = path->dentry;
+}
+
 /*
  * This limits recursive symlink follows to 8, while
  * limiting consecutive symlinks to 40.
@@ -549,9 +568,7 @@ static inline int do_follow_link(struct path *path, struct nameidata *nd)
 	nd->depth--;
 	return err;
 loop:
-	dput(path->dentry);
-	if (path->mnt != nd->mnt)
-		mntput(path->mnt);
+	dput_path(path, nd);
 	path_release(nd);
 	return err;
 }
@@ -810,13 +827,8 @@ static fastcall int __link_path_walk(const char * name, struct nameidata *nd)
 			err = -ENOTDIR; 
 			if (!inode->i_op)
 				break;
-		} else {
-			dput(nd->dentry);
-			if (nd->mnt != next.mnt)
-				mntput(nd->mnt);
-			nd->mnt = next.mnt;
-			nd->dentry = next.dentry;
-		}
+		} else
+			path_to_nameidata(&next, nd);
 		err = -ENOTDIR; 
 		if (!inode->i_op->lookup)
 			break;
@@ -856,13 +868,8 @@ last_component:
 			if (err)
 				goto return_err;
 			inode = nd->dentry->d_inode;
-		} else {
-			dput(nd->dentry);
-			if (nd->mnt != next.mnt)
-				mntput(nd->mnt);
-			nd->mnt = next.mnt;
-			nd->dentry = next.dentry;
-		}
+		} else
+			path_to_nameidata(&next, nd);
 		err = -ENOENT;
 		if (!inode)
 			break;
@@ -898,9 +905,7 @@ return_reval:
 return_base:
 		return 0;
 out_dput:
-		dput(next.dentry);
-		if (nd->mnt != next.mnt)
-			mntput(next.mnt);
+		dput_path(&next, nd);
 		break;
 	}
 	path_release(nd);
@@ -1311,10 +1316,8 @@ int vfs_create(struct inode *dir, struct dentry *dentry, int mode,
 		return error;
 	DQUOT_INIT(dir);
 	error = dir->i_op->create(dir, dentry, mode, nd);
-	if (!error) {
+	if (!error)
 		fsnotify_create(dir, dentry->d_name.name);
-		security_inode_post_create(dir, dentry, mode);
-	}
 	return error;
 }
 
@@ -1504,11 +1507,7 @@ do_last:
 	if (path.dentry->d_inode->i_op && path.dentry->d_inode->i_op->follow_link)
 		goto do_link;
 
-	dput(nd->dentry);
-	nd->dentry = path.dentry;
-	if (nd->mnt != path.mnt)
-		mntput(nd->mnt);
-	nd->mnt = path.mnt;
+	path_to_nameidata(&path, nd);
 	error = -EISDIR;
 	if (path.dentry->d_inode && S_ISDIR(path.dentry->d_inode->i_mode))
 		goto exit;
@@ -1519,9 +1518,7 @@ ok:
 	return 0;
 
 exit_dput:
-	dput(path.dentry);
-	if (nd->mnt != path.mnt)
-		mntput(path.mnt);
+	dput_path(&path, nd);
 exit:
 	path_release(nd);
 	return error;
@@ -1636,10 +1633,8 @@ int vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
 
 	DQUOT_INIT(dir);
 	error = dir->i_op->mknod(dir, dentry, mode, dev);
-	if (!error) {
+	if (!error)
 		fsnotify_create(dir, dentry->d_name.name);
-		security_inode_post_mknod(dir, dentry, mode, dev);
-	}
 	return error;
 }
 
@@ -1709,10 +1704,8 @@ int vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 
 	DQUOT_INIT(dir);
 	error = dir->i_op->mkdir(dir, dentry, mode);
-	if (!error) {
+	if (!error)
 		fsnotify_mkdir(dir, dentry->d_name.name);
-		security_inode_post_mkdir(dir,dentry, mode);
-	}
 	return error;
 }
 
@@ -1801,7 +1794,6 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
 	}
 	up(&dentry->d_inode->i_sem);
 	if (!error) {
-		fsnotify_rmdir(dentry, dentry->d_inode, dir);
 		d_delete(dentry);
 	}
 	dput(dentry);
@@ -1874,7 +1866,6 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
 
 	/* We don't d_delete() NFS sillyrenamed files--they still exist. */
 	if (!error && !(dentry->d_flags & DCACHE_NFSFS_RENAMED)) {
-		fsnotify_unlink(dentry, dir);
 		d_delete(dentry);
 	}
 
@@ -1950,10 +1941,8 @@ int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname, i
 
 	DQUOT_INIT(dir);
 	error = dir->i_op->symlink(dir, dentry, oldname);
-	if (!error) {
+	if (!error)
 		fsnotify_create(dir, dentry->d_name.name);
-		security_inode_post_symlink(dir, dentry, oldname);
-	}
 	return error;
 }
 
@@ -2023,10 +2012,8 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
 	DQUOT_INIT(dir);
 	error = dir->i_op->link(old_dentry, dir, new_dentry);
 	up(&old_dentry->d_inode->i_sem);
-	if (!error) {
+	if (!error)
 		fsnotify_create(dir, new_dentry->d_name.name);
-		security_inode_post_link(old_dentry, dir, new_dentry);
-	}
 	return error;
 }
 
@@ -2145,11 +2132,8 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
 			d_rehash(new_dentry);
 		dput(new_dentry);
 	}
-	if (!error) {
+	if (!error)
 		d_move(old_dentry,new_dentry);
-		security_inode_post_rename(old_dir, old_dentry,
-					   new_dir, new_dentry);
-	}
 	return error;
 }
 
@@ -2175,7 +2159,6 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
 		/* The following d_move() should become unconditional */
 		if (!(old_dir->i_sb->s_type->fs_flags & FS_ODD_RENAME))
 			d_move(old_dentry, new_dentry);
-		security_inode_post_rename(old_dir, old_dentry, new_dir, new_dentry);
 	}
 	if (target)
 		up(&target->i_sem);
@@ -2218,7 +2201,8 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		error = vfs_rename_other(old_dir,old_dentry,new_dir,new_dentry);
 	if (!error) {
 		const char *new_name = old_dentry->d_name.name;
-		fsnotify_move(old_dir, new_dir, old_name, new_name, is_dir, new_dentry->d_inode);
+		fsnotify_move(old_dir, new_dir, old_name, new_name, is_dir,
+			      new_dentry->d_inode, old_dentry->d_inode);
 	}
 	fsnotify_oldname_free(old_name);
 
@@ -2345,15 +2329,17 @@ out:
 int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen)
 {
 	struct nameidata nd;
-	int res;
+	void *cookie;
+
 	nd.depth = 0;
-	res = dentry->d_inode->i_op->follow_link(dentry, &nd);
-	if (!res) {
-		res = vfs_readlink(dentry, buffer, buflen, nd_get_link(&nd));
+	cookie = dentry->d_inode->i_op->follow_link(dentry, &nd);
+	if (!IS_ERR(cookie)) {
+		int res = vfs_readlink(dentry, buffer, buflen, nd_get_link(&nd));
 		if (dentry->d_inode->i_op->put_link)
-			dentry->d_inode->i_op->put_link(dentry, &nd);
+			dentry->d_inode->i_op->put_link(dentry, &nd, cookie);
+		cookie = ERR_PTR(res);
 	}
-	return res;
+	return PTR_ERR(cookie);
 }
 
 int vfs_follow_link(struct nameidata *nd, const char *link)
@@ -2396,23 +2382,20 @@ int page_readlink(struct dentry *dentry, char __user *buffer, int buflen)
 	return res;
 }
 
-int page_follow_link_light(struct dentry *dentry, struct nameidata *nd)
+void *page_follow_link_light(struct dentry *dentry, struct nameidata *nd)
 {
-	struct page *page;
+	struct page *page = NULL;
 	nd_set_link(nd, page_getlink(dentry, &page));
-	return 0;
+	return page;
 }
 
-void page_put_link(struct dentry *dentry, struct nameidata *nd)
+void page_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie)
 {
-	if (!IS_ERR(nd_get_link(nd))) {
-		struct page *page;
-		page = find_get_page(dentry->d_inode->i_mapping, 0);
-		if (!page)
-			BUG();
+	struct page *page = cookie;
+
+	if (page) {
 		kunmap(page);
 		page_cache_release(page);
-		page_cache_release(page);
 	}
 }