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Commit 20fb1936 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'vfs-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs 

Pull vfs fixes from Miklos Szeredi.

This mainly fixes some confusion about whether the open 'mode' variable
passed around should contain the full file type (S_IFREG etc)
information or just the permission mode.  In particular, the lack of
proper file type information had confused fuse.

* 'vfs-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  vfs: fix propagation of atomic_open create error on negative dentry
  fuse: check create mode in atomic open
  vfs: pass right create mode to may_o_create()
  vfs: atomic_open(): fix create mode usage
  vfs: canonicalize create mode in build_open_flags()
parents 1ce41cd8 62b2ce96

fs/fuse/dir.c

+3 −0
Original line number Diff line number Diff line
@@ -383,6 +383,9 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, 
	struct fuse_entry_out outentry;

	struct fuse_file *ff;



	/* Userspace expects S_IFREG in create mode */

	BUG_ON((mode & S_IFMT) != S_IFREG);



	forget = fuse_alloc_forget();

	err = -ENOMEM;

	if (!forget)

fs/namei.c

+6 −2
Original line number Diff line number Diff line
@@ -2414,7 +2414,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry, 
		goto out;

	}



	mode = op->mode & S_IALLUGO;

	mode = op->mode;

	if ((open_flag & O_CREAT) && !IS_POSIXACL(dir))

		mode &= ~current_umask();
@@ -2452,7 +2452,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry, 
	}



	if (open_flag & O_CREAT) {

		error = may_o_create(&nd->path, dentry, op->mode);

		error = may_o_create(&nd->path, dentry, mode);

		if (error) {

			create_error = error;

			if (open_flag & O_EXCL)
@@ -2489,6 +2489,10 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry, 
			dput(dentry);

			dentry = file->f_path.dentry;

		}

		if (create_error && dentry->d_inode == NULL) {

			error = create_error;

			goto out;

		}

		goto looked_up;

	}

fs/open.c

+4 −3
Original line number Diff line number Diff line
@@ -852,9 +852,10 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o 
	int lookup_flags = 0;

	int acc_mode;



	if (!(flags & O_CREAT))

		mode = 0;

	op->mode = mode;

	if (flags & O_CREAT)

		op->mode = (mode & S_IALLUGO) | S_IFREG;

	else

		op->mode = 0;



	/* Must never be set by userspace */

	flags &= ~FMODE_NONOTIFY;