fuse: fix attributes after open(O_TRUNC) (a0822c55) · Commits · 戴 / test

The attribute cache for a file was not being cleared when a file is opened with O_TRUNC. If the filesystem's open operation truncates the file ("atomic_o_trunc" feature flag is set) then the kernel should invalidate the cached st_mtime and st_ctime attributes. Also i_size should be explicitly be set to zero as it is used sometimes without refreshing the cache. Signed-off-by:

Ken Sumrall <ksumrall@android.com> Cc: Anfei <anfei.zhou@gmail.com> Cc: "Anand V. Avati" <avati@gluster.com> Signed-off-by:

Miklos Szeredi <miklos@szeredi.hu> Cc: <stable@kernel.org> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

fs/fuse/file.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -134,6 +134,7 @@ EXPORT_SYMBOL_GPL(fuse_do_open);
		void fuse_finish_open(struct inode inode, struct file file)
		{
		struct fuse_file *ff = file->private_data;
		struct fuse_conn *fc = get_fuse_conn(inode);

		if (ff->open_flags & FOPEN_DIRECT_IO)
		file->f_op = &fuse_direct_io_file_operations;
		@@ -141,6 +142,15 @@ void fuse_finish_open(struct inode inode, struct file file)
		invalidate_inode_pages2(inode->i_mapping);
		if (ff->open_flags & FOPEN_NONSEEKABLE)
		nonseekable_open(inode, file);
		if (fc->atomic_o_trunc && (file->f_flags & O_TRUNC)) {
		struct fuse_inode *fi = get_fuse_inode(inode);

		spin_lock(&fc->lock);
		fi->attr_version = ++fc->attr_version;
		i_size_write(inode, 0);
		spin_unlock(&fc->lock);
		fuse_invalidate_attr(inode);
		}
		}

		int fuse_open_common(struct inode inode, struct file file, bool isdir)

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